EP0521295A1 - Shaver head, especially the razor blade unit of a wet razor - Google Patents

Shaver head, especially the razor blade unit of a wet razor Download PDF

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Publication number
EP0521295A1
EP0521295A1 EP92108767A EP92108767A EP0521295A1 EP 0521295 A1 EP0521295 A1 EP 0521295A1 EP 92108767 A EP92108767 A EP 92108767A EP 92108767 A EP92108767 A EP 92108767A EP 0521295 A1 EP0521295 A1 EP 0521295A1
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EP
European Patent Office
Prior art keywords
razor
blade
blade block
plastic housing
articulated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92108767A
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German (de)
French (fr)
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EP0521295B1 (en
Inventor
Wolfgang Althaus
Michael Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilkinson Sword GmbH
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Wilkinson Sword GmbH
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Filing date
Publication date
Application filed by Wilkinson Sword GmbH filed Critical Wilkinson Sword GmbH
Publication of EP0521295A1 publication Critical patent/EP0521295A1/en
Application granted granted Critical
Publication of EP0521295B1 publication Critical patent/EP0521295B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/22—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously
    • B26B21/222—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit
    • B26B21/227—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit with blades being resiliently mounted in the changeable unit

Definitions

  • the invention relates to a razor head arranged at the front end of a handle, in particular a razor blade unit of a wet razor, in which a single or double razor blade is resiliently arranged in a plastic housing.
  • a single or double razor blade is embedded in the shaver head in a plastic housing. If the razor head is designed separately and can be attached to a handle, for which purpose the handle and the razor head have interlocking devices that correspond to one another, this is referred to as a so-called razor blade unit.
  • a plastic housing with a front guide bar is provided.
  • two razor blades are each resiliently arranged to form a double razor blade.
  • the two razor blades each rest on lateral spring tongues so that they can adapt to the contour of the face during the shave.
  • a disadvantage of this known system is that the angle and thus the setting of the razor blades does not remain constant during the shave. Undesired vibrations or movements can occur in the respective razor blade, which can be the cause of unsatisfactory cutting performance.
  • the object of the invention is to create a razor head, in particular a razor blade unit of a wet razor, with an improved spring mounting of the single or double razor blades.
  • the invention proposes that the single or double razor blade is attached to a blade block and that the blade block on a four-bar mechanism with two joints between the plastic housing and the blade block on joints with the cutting edge (s) of the razor blade (n) parallel axes against the spring force pivotable pivot levers is mounted.
  • a razor head designed according to this technical teaching in particular a razor blade unit of a wet razor with the single or double razor blade attached to a blade block, has the advantage of an improved spring suspension.
  • the two individual razor blades attached parallel to one another can be moved in parallel and thus synchronously.
  • a controlled directional movement of the razor blade block is achieved by means of the four-bar mechanism, this blade block executing a combination of rotational and translational movement.
  • the appropriate movement of the blade block and thus the razor blades depends on a corresponding positioning of the joints.
  • this controlled, directed blade bearing can achieve a movement in which undesired vibrations or movements do not occur in the razor blade or in the razor blades, so that optimum cutting performance can be achieved.
  • the resilient arrangement of the blade block within the plastic housing is such that the blade block is moved together with the razor blades essentially in the direction of the back during shaving. As soon as no more pressure is exerted on the razor block, the spring moves the blade block forward again into the basic position.
  • Another advantage of the razor head according to the invention is that only slight frictional forces occur in the pivot points of the joints and that the razor head is insensitive to contamination.
  • the one pivot lever in the front area of the blade block and the other pivot lever in the rear area of the blade block is articulated on the latter.
  • the rear linkage of the pivot lever is also to be understood as the possibility that the rear side of the blade block has an indentation within which the pivot lever is, as it were, articulated within the blade block.
  • the pivot lever articulated in the front region of the blade block is articulated with its other end in the front or middle, lower region of the plastic housing and the pivot lever arranged in the rear region of the blade block with its other end also in the lower region of the Plastic housing, but articulated behind it is.
  • the four joints preferably essentially form the corner points of a parallelogram.
  • the swivel lever articulated in the front area of the blade block is articulated with its other end in the front or middle, lower area of the plastic housing and the articulated arm articulated in the rear area of the blade block with its other end in the rear, upper area of the Plastic housing is articulated.
  • the plastic housing has the usual rear cover cap, it is proposed in a further development that the pivot lever which is articulated in the rear, upper region of the plastic housing is articulated essentially below the cover cap.
  • the swivel levers each have a bent tab at the end, through which parallel, round bearing rods are guided to the cutting edge (s) of the razor blade (s), which are fixed to the housing or fixed to the blade block. This represents a technically simple way to realize the joints.
  • the width of the pivot levers extends essentially over the entire length of the plastic housing, so that the blade block is supported over its entire width.
  • a spring is arranged on at least one pivot lever, which is supported on another part of the shaver head.
  • This other part of the shaver head can be the plastic housing, the blade block or the other pivot lever. It is only required that the spring be supported in such a way that it brings about a restoring force of the blade block in the event of a deflection.
  • the spring is preferably integrally formed on the pivot lever. This represents a technically simple possibility of realizing the spring, in particular no additional part being required.
  • a compression spring can be arranged between the blade block or one of the pivot levers and the rear wall of the plastic housing. This compression spring, supported between these two parts, represents a technically simple possibility for pivoting the blade block back into the starting position.
  • This compression spring is preferably a curved leaf or wire spring.
  • the plastic housing and / or the blade block and / or the pivot levers define stops limiting the pivoting movement with respect to one another. This specifies the start and end positions of the blade block as it moves within the plastic housing.
  • FIGS. 6 and 7 show a second embodiment of a razor blade unit.
  • the first embodiment of the razor blade unit shown in FIGS. 1 to 5 consists of a plastic housing 1. This is composed of a lower part 2 and an upper part 3, which can be correspondingly placed on one another and connected to one another, for example welded, glued, latched, plugged together, etc.
  • a blade block 4 is resiliently mounted between the lower part 2 and the upper part 3 within the plastic housing 1, this blade block 4 being able to carry out a combination of rotational and translatory movement by means of a corresponding bearing.
  • On the blade block 4 two razor blades 5 are attached to form a double razor blade, for example glued or welded.
  • This four-link mechanism 6 consists of two pivot levers 7, 7 'which (as can be seen in FIG. 2) extend over the entire width of the plastic housing 1, ie from the left side to the right side.
  • These pivot levers 7, 7 ' are formed, for example, by a correspondingly bent sheet metal stamped part or by a plastic molded part and each have flanged flaps at their ends 8 with a round inner recess.
  • These tabs 8 are pivotally mounted on bearing rods 9 and thereby form joints A to D.
  • the bearing rods 9 run parallel to the cutting edges 10 of the razor blades 5 and are either fixed to the housing (joints A and B) or fixed to the blade block (joints C and D).
  • the joints C and D of the blade block 4 are arranged on the front or rear thereof, while the joints A and B of the plastic housing 1 are inclined at the front downward in the plastic housing 1 are positioned so that the four joints A to D essentially form the corner points of a parallelogram.
  • a spring 11 is integrally formed on a pivot lever 7 and is supported on the front of the other pivot lever 7 'and thus tries to turn the pivot lever 7 counterclockwise into the basic position.
  • FIG. 4 This basic position of the blade block 4 is shown in FIG. During shaving, pressure is applied to the blade block 4, which has the effect that the blade block 4 is displaced in the direction of the rear wall 12 of the plastic housing 1 in a combined rotary and translatory movement (indicated by the arrow P). As soon as the pressurization ceases, the blade block 4 returns from the pivoting position shown in FIG. 5 to the basic position shown in FIG. 4 due to the force of the force of the spring 11.
  • the basic position is defined by stops between the plastic housing 1 and the pivot lever 7, as is the maximum pivoting position by stops between the pivot lever 7 'and the rear wall 12 of the plastic housing 1.
  • the joints A to D of the four-bar transmission 6 are arranged somewhat differently. While the joints A and C of the front pivot lever 7 correspond in their positions substantially to those of the first embodiment, the joints B and C of the rear pivot lever 7 'are arranged somewhat differently. Thus, the joint D is arranged somewhat within the blade block 4 on the rear side thereof. Above all, however, the joint B is not in the lower region of the plastic housing 1, but in the upper region above the joint D below a cover cap 13 of the plastic housing 1. For this purpose, the rear pivot lever 7 'is also angled.
  • a compression spring 14 is supported in the form of a leaf spring, which is received in a recess 15 of the plastic housing 1.
  • this second embodiment is similar to that of the first embodiment, namely that the blade block 4 with its two razor blades 5 executes a combined rotational and translational movement, provided that a force is exerted on the blade block 4 starting from the basic position shown in FIG. so that the blade block 4 reaches the end position shown in Fig. 7, which is limited by a stop between the rear pivot lever 7 'and the rear wall 12 of the plastic housing 1.

Abstract

The invention relates to a shaver head arranged at the front end of a handle, especially the razor blade unit of a wet razor, in which a single or double razor blade (5) is resiliently arranged in a plastic casing (1). In order to produce a shaver head, especially a razor blade unit of a wet razor, with improved spring bearing of the single or double razor blades, it is proposed according to the invention to attach the single or double razor blade (5) to a blade block (4) and to mount the blade block (4) on a four-bar mechanism (6) with two pivoting levers (7, 7') which can each be pivoted against the resistance of the spring between the plastic casing (1) and the blade block (4) on joints (A,C; B,D) with axes parallel to the cutting edge(s) (10) of the razor blade(s) (5). <IMAGE>

Description

Die Erfindung betrifft einen am vorderen Ende eines Handgriffs angeordneten Rasierapparatekopf, insbesondere Rasierklingeneinheit eines Naßrasierapparates, bei dem in einem Kunststoffgehäuse eine Einfach- oder Doppelrasierklinge federnd angeordnet ist.The invention relates to a razor head arranged at the front end of a handle, in particular a razor blade unit of a wet razor, in which a single or double razor blade is resiliently arranged in a plastic housing.

Bei Einwegnaßrasierapparaten ist eine Einfach- oder Doppelrasierklinge unlösbar im Rasierapparatekopf in einem Kunststoffgehäuse eingebettet. Ist der Rasierapparatekopf separat ausgebildet und kann an einem Handgriff befestigt werden, wobei zu diesem Zweck der Handgriff sowie der Rasierapparatekopf miteinander korrespondierende Verriegelungseinrichtungen aufweisen, spricht man von einer sogenannten Rasierklingeneinheit.With disposable wet shavers, a single or double razor blade is embedded in the shaver head in a plastic housing. If the razor head is designed separately and can be attached to a handle, for which purpose the handle and the razor head have interlocking devices that correspond to one another, this is referred to as a so-called razor blade unit.

Bei einer bekannten Rasierklingeneinheit eines Naßrasierapparates ist ein Kunststoffgehäuse mit einer vorderen Führungsleiste vorgesehen. Innerhalb dieses Kunststoffgehäuses sind zwei Rasierklingen zur Bildung einer Doppelrasierklinge für sich jeweils federnd angeordnet. Zu diesem Zweck liegen die beiden Rasierklingen jeweils auf seitlichen Federzungen auf, so daß sie sich während der Rasur jeweils der Gesichtskontur anpassen können.In a known razor blade unit of a wet shaver, a plastic housing with a front guide bar is provided. Within this plastic housing two razor blades are each resiliently arranged to form a double razor blade. For this purpose, the two razor blades each rest on lateral spring tongues so that they can adapt to the contour of the face during the shave.

Ein Nachteil bei diesem bekannten System ist, daß der Winkel und damit die Anstellung der Rasierklingen während der Rasur nicht konstant bleibt. Es können dabei unerwünschte Schwingungen oder Bewegungen in der jeweiligen Rasierklinge auftreten, die Ursache unbefriedigender Schnittleistungen sein können.A disadvantage of this known system is that the angle and thus the setting of the razor blades does not remain constant during the shave. Undesired vibrations or movements can occur in the respective razor blade, which can be the cause of unsatisfactory cutting performance.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, einen Rasierapparatekopf, insbesondere Rasierklingeneinheit eines Naßrasierapparates mit einer verbesserten Federlagerung der Einfach- oder Doppelrasierklingen zu schaffen.Proceeding from this, the object of the invention is to create a razor head, in particular a razor blade unit of a wet razor, with an improved spring mounting of the single or double razor blades.

Als technische Lösung wird mit der Erfindung vorgeschlagen, daß die Einfach- oder Doppelrasierklinge an einem Klingenblock befestigt ist und daß der Klingenblock an einem Viergelenkgetriebe mit zwei jeweils zwischen dem Kunststoffgehäuse und dem Klingenblock an Gelenken mit zu der (den) Schneidkante(n) der Rasierklinge(n) parallelen Achsen entgegen der Federkraft verschwenkbaren Schwenkhebeln gelagert ist.As a technical solution , the invention proposes that the single or double razor blade is attached to a blade block and that the blade block on a four-bar mechanism with two joints between the plastic housing and the blade block on joints with the cutting edge (s) of the razor blade (n) parallel axes against the spring force pivotable pivot levers is mounted.

Ein nach dieser technischen Lehre ausgebildeter Rasierapparatekopf, insbesondere Rasierklingeneinheit eines Naßrasierapparates mit der auf einem Klingenblock befestigten Einfach- oder Doppelrasierklinge hat den Vorteil einer verbesserten Federaufhängung. So sind bei der Verwendung der üblichen Doppelrasierklingen die beiden parallel zueinander befestigten Einzelrasierklingen parallel und damit synchron bewegbar. Mittels des Viergelenkgetriebes wird eine kontrolliert gerichtete Bewegung des Rasierklingenblocks erreicht, wobei dieser Klingenblock eine Kombination aus rotatorischer und translatorischer Bewegung ausführt. Die entsprechende Bewegungsführung des Klingenblocks und damit der Rasierklingen hängt dabei von einer entsprechenden Positionierung der Gelenke ab. Durch diese kontrolliert gerichtete Klingenlagerung kann eine Bewegung erreicht werden, bei der unerwünschte Schwingungen oder Bewegungen in der Rasierklinge bzw. in den Rasierklingen nicht auftreten, so daß damit optimale Schnittleistungen erzielt werden können. Die federnde Anordnung des Klingenblocks innerhalb des Kunststoffgehäuses ist dabei derart, daß während der Rasur der Klingenblock zusammen mit den Rasierklingen im wesentlichen in Richtung Rückseite bewegt wird. Sobald auf den Rasierklingenblock kein Druck mehr ausgeübt wird, bewegt die Feder den Klingenblock wieder nach vorne in die Grundstellung. Ein weiterer Vorteil des erfindungsgemäßen Rasierapparatekopfes liegt darin, daß in den Drehpunkten der Gelenke nur geringe Reibungskräfte auftreten und daß der Rasierapparatekopf unempfindlich gegen Verschmutzung ist.A razor head designed according to this technical teaching, in particular a razor blade unit of a wet razor with the single or double razor blade attached to a blade block, has the advantage of an improved spring suspension. Thus, when using the usual double razor blades, the two individual razor blades attached parallel to one another can be moved in parallel and thus synchronously. A controlled directional movement of the razor blade block is achieved by means of the four-bar mechanism, this blade block executing a combination of rotational and translational movement. The appropriate movement of the blade block and thus the razor blades depends on a corresponding positioning of the joints. By this controlled, directed blade bearing can achieve a movement in which undesired vibrations or movements do not occur in the razor blade or in the razor blades, so that optimum cutting performance can be achieved. The resilient arrangement of the blade block within the plastic housing is such that the blade block is moved together with the razor blades essentially in the direction of the back during shaving. As soon as no more pressure is exerted on the razor block, the spring moves the blade block forward again into the basic position. Another advantage of the razor head according to the invention is that only slight frictional forces occur in the pivot points of the joints and that the razor head is insensitive to contamination.

In einer bevorzugten Weiterbildung wird vorgeschlagen, daß der eine Schwenkhebel im vorderseitigen Bereich des Klingenblocks und der andere Schwenkhebel im rückseitigen Bereich des Klingenblocks an diesem angelenkt ist. Dadurch ergeben sich optimale Möglichkeiten für die sowohl rotatorische als auch translatorische Bewegungsführung des Klingenblocks. Unter der rückseitigen Anlenkung des Schwenkhebels ist auch die Möglichkeit zu verstehen, daß die Rückseite des Klingenblocks eine Einbuchtung aufweist, innerhalb der der Schwenkhebel gewissermaßen innerhalb des Klingenblocks angelenkt ist.In a preferred development it is proposed that the one pivot lever in the front area of the blade block and the other pivot lever in the rear area of the blade block is articulated on the latter. This results in optimal possibilities for both rotary and translational movement of the blade block. The rear linkage of the pivot lever is also to be understood as the possibility that the rear side of the blade block has an indentation within which the pivot lever is, as it were, articulated within the blade block.

In einer ersten alternativen Weiterbildung hiervon wird vorgeschlagen, daß der im vorderseitigen Bereich des Klingenblocks angelenkte Schwenkhebel mit seinem anderen Ende im vorderen oder mittleren, unteren Bereich des Kunststoffgehäuses angelenkt und der im rückseitigen Bereich des Klingenblocks angeordnete Schwenkhebel mit seinem anderen Ende ebenfalls im unteren Bereich des Kunststoffgehäuses, jedoch dahinter angelenkt ist. In einer Weiterbildung hiervon bilden dabei die vier Gelenke vorzugsweise im wesentlichen die Eckpunkte eines Parallelogramms.In a first alternative development of this, it is proposed that the pivot lever articulated in the front region of the blade block is articulated with its other end in the front or middle, lower region of the plastic housing and the pivot lever arranged in the rear region of the blade block with its other end also in the lower region of the Plastic housing, but articulated behind it is. In a development of this, the four joints preferably essentially form the corner points of a parallelogram.

In einer zweiten alternativen Variante wird vorgeschlagen, daß der im vorderseitigen Bereich des Klingenblocks angelenkte Schwenkhebel mit seinem anderen Ende im vorderen oder mittleren, unteren Bereich des Kunststoffgehäuses angelenkt und der im rückseitigen Bereich des Klingenblocks angelenkte Schwenkhebel mit seinem anderen Ende im hinteren, oberen Bereich des Kunststoffgehäuses angelenkt ist. Sofern das Kunststoffgehäuse die übliche hintere Abdeckkappe aufweist, wird in einer Weiterbildung vorgeschlagen, daß der im hinteren, oberen Bereich des Kunststoffgehäuses angelenkte Schwenkhebel im wesentlichen unterhalb der Abdeckkappe angelenkt ist.In a second alternative variant it is proposed that the swivel lever articulated in the front area of the blade block is articulated with its other end in the front or middle, lower area of the plastic housing and the articulated arm articulated in the rear area of the blade block with its other end in the rear, upper area of the Plastic housing is articulated. If the plastic housing has the usual rear cover cap, it is proposed in a further development that the pivot lever which is articulated in the rear, upper region of the plastic housing is articulated essentially below the cover cap.

Diese beiden Varianten sind nur zwei mögliche Ausführungsformen der Lagerung des Klingenblocks innerhalb des Kunststoffgehäuses, die eine Kombination aus rotatorischer und translatorischer Bewegung ermöglichen. Das Prinzip des Viergelenkgetriebes ist jedoch nicht auf diese beiden Ausführungsformen beschränkt, sondern es sind durchaus noch weitere Ausführungsformen denkbar. Diese hängen von der entsprechenden Wahl der Gelenkepositionen ab. Durch eine entsprechende Positionierung der Gelenke innerhalb des Kunststoffgehäuses können die gewünschten Bewegungsführungen des Klingenblocks und damit der Rasierklingen erreicht werden.These two variants are only two possible embodiments of the mounting of the blade block within the plastic housing, which enable a combination of rotary and translatory movement. However, the principle of the four-bar transmission is not limited to these two embodiments, but further embodiments are also conceivable. These depend on the corresponding choice of joint positions. Appropriate positioning of the joints within the plastic housing enables the desired movement guidance of the blade block and thus of the razor blades to be achieved.

In einer bevorzugten Weiterbildung der Schwenkhebel weisen diese endseitig jeweils eine umgebogene Lasche auf, durch die zu der (den) Schneidkante(n) der Rasierklinge(n) parallele, gehäusefeste oder klingenblockfeste sowie runde Lagerstangen geführt sind. Dies stellt eine technisch einfache Möglichkeit zur Realisierung der Gelenke dar.In a preferred development of the swivel levers, they each have a bent tab at the end, through which parallel, round bearing rods are guided to the cutting edge (s) of the razor blade (s), which are fixed to the housing or fixed to the blade block. This represents a technically simple way to realize the joints.

Um insgesamt eine stabile Bewegungslagerung des Klingenblocks zu schaffen, erstrecken sich die Schwenkhebel hinsichtlich ihrer Breite im wesentlichen über die gesamte Länge des Kunststoffgehäuses, so daß der Klingenblock über seine gesamte Breite unterstützt ist.In order to create a stable movement of the blade block as a whole, the width of the pivot levers extends essentially over the entire length of the plastic housing, so that the blade block is supported over its entire width.

Eine weitere Weiterbildung schlägt vor, daß wenigstens am einen Schwenkhebel eine Feder angeordnet ist, die an einem anderen Teil des Rasierapparatekopfes abgestützt ist. Dieses andere Teil des Rasierapparatekopfes kann das Kunststoffgehäuse, der Klingenblock oder der andere Schwenkhebel sein. Es ist lediglich gefordert, daß die Feder derart abgestützt ist, daß sie eine Rückstellkraft des Klingenblocks bei einer Auslenkung bewirkt.A further development suggests that a spring is arranged on at least one pivot lever, which is supported on another part of the shaver head. This other part of the shaver head can be the plastic housing, the blade block or the other pivot lever. It is only required that the spring be supported in such a way that it brings about a restoring force of the blade block in the event of a deflection.

Vorzugsweise ist dabei die Feder einstückig am Schwenkhebel angeformt. Dies stellt eine technisch einfache Möglichkeit zur Realisierung der Feder dar, wobei insbesondere kein zusätzliches Teil benötigt wird.The spring is preferably integrally formed on the pivot lever. This represents a technically simple possibility of realizing the spring, in particular no additional part being required.

Alternativ kann zwischen dem Klingenblock oder einem der Schwenkhebel und der Rückwand des Kunststoffgehäuses eine Druckfeder angeordnet sein. Diese zwischen diesen beiden Teilen abgestützte Druckfeder stellt eine technisch einfache Möglichkeit dar, um den Klingenblock in die Ausgangsposition zurückzuverschwenken.Alternatively, a compression spring can be arranged between the blade block or one of the pivot levers and the rear wall of the plastic housing. This compression spring, supported between these two parts, represents a technically simple possibility for pivoting the blade block back into the starting position.

Vorzugsweise handelt es sich bei dieser Druckfeder um eine gewölbte Blatt- oder Drahtfeder.This compression spring is preferably a curved leaf or wire spring.

Schließlich wird in einer Weiterbildung vorgeschlagen, daß das Kunststoffgehäuse und/oder der Klingenblock und/oder die Schwenkhebel bezüglich zueinander die Verschwenkbewegung begrenzende Anschläge definieren. Dadurch sind die Anfangs- und Endpositionen des Klingenblocks bei seiner Bewegung innerhalb des Kunststoffgehäuses vorgegeben.Finally, it is proposed in a further development that the plastic housing and / or the blade block and / or the pivot levers define stops limiting the pivoting movement with respect to one another. This specifies the start and end positions of the blade block as it moves within the plastic housing.

Zwei Ausführungsbeispiele eines erfindungsgemäßen Rasierapparatekopfes in Form einer Rasierklingeneinheit eines Naßrasierapparates werden nachfolgend anhand der Zeichnungen beschrieben. In diesen zeigt:

Fig. 1
eine perspektivische Ansicht der Rasierklingeneinheit;
Fig. 2
eine Art Explosionsdarstellung der Rasierklingeneinheit in Fig. 1 vor dem Zusammenbau;
Fig. 3
eine Darstellung entsprechend der in Fig. 1, wobei jedoch der Klingenblock aus seiner Grundstellung ausgelenkt worden ist;
Fig. 4
einen Schnitt durch die Rasierklingeneinheit in der Grundposition des Klingenblocks;
Fig. 5
eine Darstellung entsprechend der in Fig. 4, jedoch nach dem Verschwenken des Klingenblocks;
Fig. 6
eine alternative Ausführungsform der Lagerung des Klingenblocks innerhalb des Kunststoffge häuses in einer Schnittdarstellung entsprechend der in Fig. 4;
Fig. 7
eine Darstellung entsprechend der in Fig. 6, jedoch nach dem Verschwenken des Klingenblocks.
Two embodiments of a razor head according to the invention in the form of a razor blade unit of a wet shaver are described below with reference to the drawings. In these shows:
Fig. 1
a perspective view of the razor blade unit;
Fig. 2
a kind of exploded view of the razor blade unit in Figure 1 before assembly.
Fig. 3
a representation corresponding to that in Figure 1, but with the blade block has been deflected from its basic position.
Fig. 4
a section through the razor blade unit in the basic position of the blade block;
Fig. 5
a representation corresponding to that in Figure 4, but after pivoting the blade block.
Fig. 6
an alternative embodiment of the storage of the blade block within the Kunststoffge housing in a sectional view corresponding to that in Fig. 4;
Fig. 7
a representation corresponding to that in Fig. 6, but after pivoting the blade block.

In den Fig. 1 bis 5 ist eine erste Ausführungsform und in den Fig. 6 und 7 eine zweite Ausführungsform einer Rasierklingeneinheit dargestellt.1 to 5 show a first embodiment and FIGS. 6 and 7 show a second embodiment of a razor blade unit.

Die in den Fig. 1 bis 5 dargestellte erste Ausführungsform der Rasierklingeneinheit besteht aus einem Kunststoffgehäuse 1. Dieses setzt sich zusammen aus einem Unterteil 2 und einem Oberteil 3, die entsprechend aufeinandersetzbar und miteinander verbindbar sind, beispielsweise verschweißbar, verklebbar, verrastbar, ineinandersteckbar etc.The first embodiment of the razor blade unit shown in FIGS. 1 to 5 consists of a plastic housing 1. This is composed of a lower part 2 and an upper part 3, which can be correspondingly placed on one another and connected to one another, for example welded, glued, latched, plugged together, etc.

Innerhalb des Kunststoffgehäuses 1 ist zwischen dem Unterteil 2 und dem Oberteil 3 ein Klingenblock 4 federnd gelagert, wobei dieser Klingenblock 4 eine Kombination aus rotatorischer und translatorischer Bewegung durch eine entsprechende Lagerung ausführen kann. Auf dem Klingenblock 4 sind zwei Rasierklingen 5 zur Bildung einer Doppelrasierklinge befestigt, beispielsweise aufgeklebt oder aufgeschweißt.A blade block 4 is resiliently mounted between the lower part 2 and the upper part 3 within the plastic housing 1, this blade block 4 being able to carry out a combination of rotational and translatory movement by means of a corresponding bearing. On the blade block 4 two razor blades 5 are attached to form a double razor blade, for example glued or welded.

Die bereits erwähnte Lagerung des Klingenblocks 4 innerhalb des Kunststoffgehäuses 1 für eine kombinierte rotatorische und translatorische Bewegung ist durch ein sogenanntes Viergelenkgetriebe 6 realisiert. Dieses Viergelenkgetriebe 6 besteht aus zwei Schwenkhebeln 7,7', die sich (wie Fig. 2 erkennen läßt) über die gesamte Breite des Kunststoffgehäuses 1 erstrecken, d.h. von der linken Seite bis zur rechten Seite. Diese Schwenkhebel 7,7' sind beispielsweise durch ein entsprechend gebogenes Blechstanzteil oder durch ein Kunststofformteil gebildet und weisen an ihren Enden jeweils umgebördelte Laschen 8 mit einer runden Innenausnehmung auf. Diese Laschen 8 sind auf Lagerstangen 9 verschwenkbar gelagert und bilden dadurch Gelenke A bis D. Die Lagerstangen 9 verlaufen dabei parallel zu den Schneidkanten 10 der Rasierklingen 5 und sind entweder gehäusefest (Gelenke A und B) oder klingenblockfest (Gelenke C und D) angeordnet.The already mentioned storage of the blade block 4 within the plastic housing 1 for a combined rotary and translatory movement is realized by a so-called four-bar mechanism 6. This four-link mechanism 6 consists of two pivot levers 7, 7 'which (as can be seen in FIG. 2) extend over the entire width of the plastic housing 1, ie from the left side to the right side. These pivot levers 7, 7 'are formed, for example, by a correspondingly bent sheet metal stamped part or by a plastic molded part and each have flanged flaps at their ends 8 with a round inner recess. These tabs 8 are pivotally mounted on bearing rods 9 and thereby form joints A to D. The bearing rods 9 run parallel to the cutting edges 10 of the razor blades 5 and are either fixed to the housing (joints A and B) or fixed to the blade block (joints C and D).

Wie in den Fig. 4 und 5 der ersten Ausführungsform erkennbar ist, sind die Gelenke C und D des Klingenblocks 4 an dessen Vorderseite bzw. an dessen Rückseite angeordnet, während die Gelenke A und B des Kunststoffgehäuses 1 schräg vorne nach unten hin im Kunststoffgehäuse 1 positioniert sind, so daß die vier Gelenke A bis D im wesentlichen die Eckpunkte eines Parallelogramms bilden.As can be seen in FIGS. 4 and 5 of the first embodiment, the joints C and D of the blade block 4 are arranged on the front or rear thereof, while the joints A and B of the plastic housing 1 are inclined at the front downward in the plastic housing 1 are positioned so that the four joints A to D essentially form the corner points of a parallelogram.

Weiterhin ist erkennbar, daß am einen Schwenkhebel 7 eine Feder 11 einstückig angeformt ist und sich an der Frontseite des anderen Schwenkhebels 7' abstützt und somit den Schwenkhebel 7 entgegen dem Uhrzeigersinn in die Grundposition zu drehen versucht.Furthermore, it can be seen that a spring 11 is integrally formed on a pivot lever 7 and is supported on the front of the other pivot lever 7 'and thus tries to turn the pivot lever 7 counterclockwise into the basic position.

In Fig. 4 ist diese Grundposition des Klingenblocks 4 dargestellt. Während der Rasur erfolgt eine Druckbeaufschlagung auf den Klingenblock 4, was den Effekt hat, daß der Klingenblock 4 in Richtung Rückwand 12 des Kunststoffgehäuses 1 in einer kombinierten rotatorischen und translatorischen Bewegung verschoben wird (durch den Pfeil P angedeutet). Sobald die Druckbeaufschlagung aufhört, kehrt der Klingenblock 4 aufgrund der Kraft der Kraft der Feder 11 von der in Fig. 5 dargestellten Verschwenkposition wieder in die in Fig. 4 dargestellte Grundposition zurück. Die Grundposition ist dabei durch Anschläge zwischen dem Kunststoffgehäuse 1 und dem Schwenkhebel 7 definiert, ebenso die maximale Verschwenkstellung durch Anschläge zwischen dem Schwenkhebel 7' und der Rückwand 12 des Kunststoffgehäuses 1.This basic position of the blade block 4 is shown in FIG. During shaving, pressure is applied to the blade block 4, which has the effect that the blade block 4 is displaced in the direction of the rear wall 12 of the plastic housing 1 in a combined rotary and translatory movement (indicated by the arrow P). As soon as the pressurization ceases, the blade block 4 returns from the pivoting position shown in FIG. 5 to the basic position shown in FIG. 4 due to the force of the force of the spring 11. The basic position is defined by stops between the plastic housing 1 and the pivot lever 7, as is the maximum pivoting position by stops between the pivot lever 7 'and the rear wall 12 of the plastic housing 1.

Bei der alternativen Ausführungsform in Fig. 6 und 7 sind die Gelenke A bis D des Viergelenkgetriebes 6 etwas anders angeordnet. Während die Gelenke A und C des vorderen Schwenkhebels 7 in ihren Positionen im wesentlichen denen der ersten Ausführungsform entsprechen, sind die Gelenke B und C des hinteren Schwenkhebels 7' etwas anders angeordnet. So ist das Gelenk D etwas innerhalb des Klingenblocks 4 an dessen Rückseite angeordnet. Vor allem aber befindet sich das Gelenk B nicht im unteren Bereich des Kunststoffgehäuses 1, sondern im oberen Bereich oberhalb des Gelenks D unterhalb einer Abdeckkappe 13 des Kunststoffgehäuses 1. Zu diesem Zweck ist der hintere Schwenkhebel 7' auch abgewinkelt ausgebildet.In the alternative embodiment in FIGS. 6 and 7, the joints A to D of the four-bar transmission 6 are arranged somewhat differently. While the joints A and C of the front pivot lever 7 correspond in their positions substantially to those of the first embodiment, the joints B and C of the rear pivot lever 7 'are arranged somewhat differently. Thus, the joint D is arranged somewhat within the blade block 4 on the rear side thereof. Above all, however, the joint B is not in the lower region of the plastic housing 1, but in the upper region above the joint D below a cover cap 13 of the plastic housing 1. For this purpose, the rear pivot lever 7 'is also angled.

Ein weiterer Unterschied besteht darin, daß zwischen der Rückwand 12 des Kunststoffgehäuses 1 und dem Klingenblock 4 eine Druckfeder 14 in Form einer Blattfeder abgestützt ist, welche in einer Ausnehmung 15 des Kunststoffgehäuses 1 aufgenommen ist.Another difference is that between the rear wall 12 of the plastic housing 1 and the blade block 4, a compression spring 14 is supported in the form of a leaf spring, which is received in a recess 15 of the plastic housing 1.

Die Wirkungsweise dieser zweiten Ausführungsform ist allerdings ähnlich der der ersten Ausführungsform, indem nämlich der Klingenblock 4 mit seinen beiden Rasierklingen 5 eine kombinierte rotatorische und translatorische Bewegung ausführt, sofern auf den Klingenblock 4 ausgehend von der in Fig. 6 dargestellten Grundstellung eine Kraft ausgeübt wird, so daß der Klingenblock 4 die in Fig. 7 dargestellte Endposition erreicht, die durch einen Anschlag zwischen dem hinteren Schwenkhebel 7' und der Rückwand 12 des Kunststoffgehäuses 1 begrenzt ist.However, the mode of operation of this second embodiment is similar to that of the first embodiment, namely that the blade block 4 with its two razor blades 5 executes a combined rotational and translational movement, provided that a force is exerted on the blade block 4 starting from the basic position shown in FIG. so that the blade block 4 reaches the end position shown in Fig. 7, which is limited by a stop between the rear pivot lever 7 'and the rear wall 12 of the plastic housing 1.

In den Zeichnungen sind nur zwei mögliche Ausführungsformen der Lagerung des Klingenblocks mittels eines Viergelenkgetriebes 6 dargestellt. Andere Ausführungsformen sind grundsätzlich denkbar. Der wesentliche Vorteil der Lagerung des Klingenblocks 4 mittels eines Viergelenkgetriebes 6 innerhalb des Kunststoffgehäuses 1 liegt in einer kontrolliert gerichteten Bewegung des Klingenblocks 4 während der Rasur, so daß eine Bewegung der Rasierklingen 5 auf dem Klingenblock 4 erreicht werden kann, die eine Kombination aus rotatorischer und translatorischer Bewegung darstellt. Weitere Vorteile des Systems sind die geringen Reibungskräfte in den Gelenken A bis D sowie die Unempfindlichkeit gegen Verschmutzung, da die Schwenkhebel 7,7' nur seitwärts angeordnet werden können.In the drawings, only two possible embodiments of the mounting of the blade block by means of a four-bar linkage 6 are shown. Other embodiments are basically conceivable. The main advantage of the storage of the blade block 4 by means of a four-bar mechanism 6 within the plastic housing 1 lies in a controlled directional movement of the blade block 4 during shaving, so that a movement of the razor blades 5 on the blade block 4 can be achieved, which is a combination of rotary and represents translational movement. Further advantages of the system are the low frictional forces in the joints A to D and the insensitivity to dirt, since the swivel levers 7,7 'can only be arranged sideways.

BezugszeichenlisteReference symbol list

11
KunststoffgehäusePlastic housing
22nd
UnterteilLower part
33rd
OberteilTop
44th
KlingenblockBlade block
55
Rasierklingerazor blade
66
ViergelenkgetriebeFour-bar gearbox
77
SchwenkhebelSwivel lever
7'7 '
SchwenkhebelSwivel lever
88th
LascheTab
99
LagerstangeBearing rod
1010th
SchneidkanteCutting edge
1111
Federfeather
1212
RückwandBack wall
1313
AbdeckkappeCover cap
1414
DruckfederCompression spring
1515
AusnehmungRecess
AA
Gelenkjoint
BB
Gelenkjoint
CC.
Gelenkjoint
DD
Gelenkjoint
PP
Pfeilarrow

Claims (13)

Am vorderen Ende eines Handgriffs angeordneter Rasierapparatekopf, insbesondere Rasierklingeneinheit eines Naßrasierapparates,
bei dem in einem Kunststoffgehäuse (1) eine Einfach- oder Doppelrasierklinge (5) federnd angeordnet ist,
dadurch gekennzeichnet,
daß die Einfach- oder Doppelrasierklinge (5) an einem Klingenblock (4) befestigt ist und
daß der Klingenblock (4) an einem Viergelenkgetriebe (6) mit zwei jeweils zwischen dem Kunststoffgehäuse (1) und dem Klingenblock (4) an Gelenken (A,C; B,D) mit zu der (den) Schneidkante(n) (10) der Rasierklinge(n) (5) parallelen Achsen entgegen der Federkraft verschwenkbaren Schwenkhebeln (7,7') gelagert ist.A razor head arranged at the front end of a handle, in particular a razor blade unit of a wet razor,
in which a single or double razor blade (5) is resiliently arranged in a plastic housing (1),
characterized by
that the single or double razor blade (5) is attached to a blade block (4) and
that the blade block (4) on a four-bar mechanism (6) with two each between the plastic housing (1) and the blade block (4) at joints (A, C; B, D) with the cutting edge (s) (10 ) the razor blade (s) (5) have parallel axes pivotable against the spring force pivoting levers (7,7 '). Rasierapparatekopf nach Anspruch 1, dadurch gekennzeichnet, daß der eine Schwenkhebel (7) im vorderseitigen Bereich des Klingenblocks (4) und der andere Schwenkhebel (7') im rückseitigen Bereich des Klingenblocks (4) an diesem angelenkt ist.A razor head according to claim 1, characterized in that one pivot lever (7) is articulated to the blade block (4) in the front area of the blade block (4) and the other pivot lever (7 ') is articulated to the blade block (4) in the rear area thereof. Rasierapparatekopf nach Anspruch 2, dadurch gekennzeichnet, daß der im frontseitigen Bereich des Klingenblocks (4) angelenkte Schwenkhebel (7) mit seinem anderen Ende im vorderen oder mittleren, unteren Bereich des Kunststoffgehäuses (1) angelenkt und der im rückseitigen Bereich des Klingenblocks (4) angelenkte Schwenkhebel (7') mit seinem anderen Ende ebenfalls im unteren Bereich des Kunststoffgehäuses (1), jedoch dahinter angelenkt ist.A razor head according to claim 2, characterized in that the pivoting lever (7) articulated in the front area of the blade block (4) is articulated with its other end in the front or middle, lower area of the plastic housing (1) and that in the rear area of the blade block (4) Articulated pivot lever (7 ') with its other end also in the lower region of the plastic housing (1), but articulated behind it. Rasierapparatekopf nach Anspruch 3, dadurch gekennzeichnet, daß die vier Gelenke (A bis D) im wesentlichen die Eckpunkte eines Parallelogramms bilden.A razor head according to claim 3, characterized in that the four joints (A to D) essentially form the corner points of a parallelogram. Rasierapparatekopf nach Anspruch 2, dadurch gekennzeichnet, daß der im vorderseitigen Bereich des Klingenblocks (4) angelenkte Schwenkhebel (7) mit seinem anderen Ende im vorderen oder mittleren, unteren Bereich des Kunststoffgehäuses (1) angelenkt und der im rückseitigen Bereich des Klingenblocks (4) angelenkte Schwenkhebel (7') mit seinem anderen Ende im hinteren, oberen Bereich des Kunststoffgehäuses (1) angelenkt ist.A razor head according to claim 2, characterized in that the pivoting lever (7) articulated in the front area of the blade block (4) is articulated with its other end in the front or middle, lower area of the plastic housing (1) and that in the rear area of the blade block (4) Articulated pivot lever (7 ') is articulated with its other end in the rear, upper area of the plastic housing (1). Rasierapparatekopf nach Anspruch 5, wobei das Kunststoffgehäuse (1) eine hintere Abdeckkappe (13) aufweist, dadurch gekennzeichnet, daß der im hinteren, oberen Bereich des Kunststoffgehäuses (1) angelenkte Schwenkhebel (7') im wesentlichen unterhalb der Abdeckkappe (13) angelenkt ist.A razor head according to claim 5, wherein the plastic housing (1) has a rear cover cap (13), characterized in that the pivoting lever (7 ') articulated in the rear, upper region of the plastic housing (1) is articulated substantially below the cover cap (13) . Rasierapparatekopf nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Schwenkhebel (7,7') endseitig jeweils eine umgebogene Lasche (8) aufweisen, durch die zu der (den) Schneidkante(n) (10) der Rasierklinge(n) (5) parallele, gehäusefeste oder klingenblockfeste sowie runde Lagerstangen (9) geführt sind.A razor head according to one of claims 1 to 6, characterized in that the pivot levers (7, 7 ') each have a bent tab (8) at the end, through which the cutting edge (s) (10) of the razor blade (s) (5) parallel, housing-fixed or blade block-fixed as well as round bearing rods (9) are guided. Rasierapparatekopf nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sich die Schwenkhebel (7,7') hinsichtlich ihrer Breite im wesentlichen über die gesamte Länge des Kunststoffgehäuses (1) erstrecken.A razor head according to one of claims 1 to 7, characterized in that the pivot levers (7, 7 ') extend with respect to their width essentially over the entire length of the plastic housing (1). Rasierapparatekopf nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß wenigstens am einen Schwenkhebel (7) eine Feder (11) angeordnet ist, die an einem anderen Teil des Rasierapparatekopfes abgestützt ist.A razor head according to one of claims 1 to 8, characterized in that at least one swivel lever (7) a spring (11) is arranged, which is supported on another part of the shaver head. Rasierapparatekopf nach Anspruch 9, dadurch gekennzeichnet, daß die Feder (11) einstückig am Schwenkhebel (7) angeformt ist.A razor head according to claim 9, characterized in that the spring (11) is integrally formed on the swivel lever (7). Rasierapparatekopf nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß zwischen dem Klingenblock (4) oder einem der Schwenkhebel (7') und der Rückwand (12) des Kunststoffgehäuses (1) eine Druckfeder (14) angeordnet ist.A razor head according to one of claims 1 to 8, characterized in that a compression spring (14) is arranged between the blade block (4) or one of the pivot levers (7 ') and the rear wall (12) of the plastic housing (1). Rasierapparatekopf nach Anspruch 11, dadurch gekennzeichnet, daß die Druckfeder (14) eine gewölbte Blatt- oder Drahtfeder ist.A razor head according to claim 11, characterized in that the compression spring (14) is a curved leaf or wire spring. Rasierapparatekopf nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß das Kunststoffgehäuse (1) und/oder der Klingenblock (4) und/oder die Schwenkhebel (7,7') bezüglich zueinander die Verschwenkbewegung begrenzende Anschläge definieren.A razor head according to one of claims 1 to 12, characterized in that the plastic housing (1) and / or the blade block (4) and / or the pivot levers (7, 7 ') define stops which limit the pivoting movement with respect to one another.
EP92108767A 1991-07-03 1992-05-25 Shaver head, especially the razor blade unit of a wet razor Expired - Lifetime EP0521295B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9108212U DE9108212U1 (en) 1991-07-03 1991-07-03
DE9108212U 1991-07-03

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EP0521295B1 EP0521295B1 (en) 1995-04-19

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US (1) US5222300A (en)
EP (1) EP0521295B1 (en)
JP (1) JP3284474B2 (en)
AT (1) ATE121337T1 (en)
BR (1) BR9202599A (en)
DE (2) DE9108212U1 (en)
ES (1) ES2073812T3 (en)
RU (1) RU2058882C1 (en)

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JP5032729B2 (en) * 1999-11-29 2012-09-26 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ A shaving head having a subframe and a main frame and a shaving device including such a shaving head
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USD1005592S1 (en) * 2023-08-11 2023-11-21 Shenzhen Early Century Technology Co., Ltd. Shaver replacement head

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Also Published As

Publication number Publication date
ES2073812T3 (en) 1995-08-16
JP3284474B2 (en) 2002-05-20
BR9202599A (en) 1993-03-16
DE9108212U1 (en) 1992-10-29
ATE121337T1 (en) 1995-05-15
US5222300A (en) 1993-06-29
RU2058882C1 (en) 1996-04-27
EP0521295B1 (en) 1995-04-19
DE59201958D1 (en) 1995-05-24
JPH05184741A (en) 1993-07-27

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