US3433914A - Pushbutton switch - Google Patents
Pushbutton switch Download PDFInfo
- Publication number
- US3433914A US3433914A US678108A US67810867A US3433914A US 3433914 A US3433914 A US 3433914A US 678108 A US678108 A US 678108A US 67810867 A US67810867 A US 67810867A US 3433914 A US3433914 A US 3433914A
- Authority
- US
- United States
- Prior art keywords
- spring
- contact
- board
- pushbutton
- coil
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
- H01H1/245—Spring wire contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/20—Driving mechanisms
- H01H13/22—Driving mechanisms acting with snap action
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/51—Fixed connections for rigid printed circuits or like structures
- H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
- H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/7076—Coupling devices for connection between PCB and component, e.g. display
Definitions
- the present invention relates to a switching device, especially suitable for application to printed circuit boards.
- Such switching devices comprising push button operating means are used for instance in pushbutton sets for pulsing in telephone instruments.
- These pushbutton sets which must be mounted in the space provided for the conventional dial, must not be bulky, whereby the design of the device presents a problem, especially as the space available for the required contact springs is limited.
- a known design uses reed contacts that are located substantially in parallel relationship to thecircuit board and conveniently secured to the same. When actuated, the movable springs make or break the contact with fixed contacts provided on the board. In this arrangement, however, it becomes necessary to use short contact springs, which has inherent disadvantages, such as a bad contact sliding at the closure moment of contact engagement, which may jeopardize an effective operation, as well as cause a relatively high deflection stress on a short spring length.
- reed springs of U-form are mounted on a support projecting from the board, so that the arms of the U-formed springs are placed perpendicularly to the board.
- the ends of the spring arms are inserted into holes in the board to cooperate with fixed contacts arranged on the edges of the holes. Ihe spring movement is obtained by displacement of the push button in a direction tangential to the spring.
- This device has the disadvantage that the deflection of the contact spring might cause fracture t of the spring.
- the device of the invention is similar to this lastmentioned construction in that the springs are located on supports projecting vfrom the board and have contact arms that are substantially perpendicular to the board. It constitutes, however, an improvement of the known device in that the detlection length of the spring is considerably greater although the spring still occupies a reduced space. The spring furthermore is not subjected to bends that are likely to cause a fracture.
- FIGURE 1 shows an exploded view of the pushbutton mechanism and FIGURE 2 shows the position of the contact spring in three different phases of the pushbutton movement.
- the pushbutton mechanism is supported by a base plate 1 of insulating material that may be common to a plurality of pushbuttons.
- the base plate has secured thereon an elastic support 2 for each pushbutton mechanism.
- a pushbutton 3 has a center shaft 4 that tits into a hole 5 in the base plate 1, which hole serves as a guide for the shaft.
- a cover plate 6 with a square hole 7 is provided, through which hole the upper square portion of the pushbutton may protrude.
- the shaft 4 is inserted into the hole 5, whereafter the cover plate 6 is placed over the upper part of the pushbutton and in a convenient manner secured to the base plate 1 at a predetermined distance from the same.
- the button is provided with a helical spring 10, located on an upper part 8 of the center shaft, which spring normally pushes the button 3 upwards, so that its flange 9 rests against the bottom side of the cover plate 6.
- the switching device further comprises two movable contact ⁇ springs 13 and 14, one being a mirror image of the other.
- the contact springs are made of resilient wire and designed to be mounted on the support 2. For this purpose they are provided 'with a coil spiral 19 at their upper part, which coil spiral fits into a recess 21 in the support 2, where it is retained without being squeezed.
- the recess 21 has an upper opening that is somewhat narrower than the outer diameter of the coil spiral. The coil spiral may, however, be pushed down through this opening because the support 2 is made of an elastic material.
- each spring has at the end of one 'arm a cylindrical contact 17 for cooperation with a fixed contact '12. At an intermediate portion of this arm is provided with a coil spiral 20 which partly serves to absorb the deection stresses during the actuation of the spring and partly serves as an actuation surface for the pushbutton, thereby providing a convenient trigger point as is explained below.
- the other arm of the spring is straight and, when mounting the spring in the support 2, this arm is inserted into a hole 25 through the base plate 1 and the printed circuit board 11, so that this arm may be soldered to a printed circuit on the bottom side of the circuit board as shown at 15 and 16 (FIG. 2).
- the cylindrical contact 17 provided on the end of the other arm is inserted into another hole 26.
- the fixed contact 12 made in form of a wire, is located in a groove 27 in the bottom side of the base plate and has a V-formed portion 18 for cooperation with the contact 17.
- the wire 12 may at a convenient place cross the circuit board and be connected to a conductor on this board.
- the pushbutton is provided with an actuation member 23 for actuating the springs.
- the actuation member is at its lower end provided with two symmetrical curved recesses 24 for actuating the coil spirals 20 of the springs 13 and 14.
- the vertical diameter of the coil spirals are practically in the same plane as the vertical side of the respective actuation member, a fact that produces the desired trigger point effect (see FIG. 2).
- a person pressing the pushbutton has, in order to overcome the reaction of the spring, to increase the force so that the springs are displaced laterally thereby making contact with the fixed contacts.
- a switching device for switching conductors of a printed circuit board comprising in combination:
- an actuating member supported by said board on the side thereof mounting the support and displaceable normal to the plane of the board, said member having on one end a portion engaging said spiral coil upon depressing the actuating member from an inactive position into a predetermined depressed position with reference to the plane of the board, engagement of said portion with said spiral coil displacing the latter substantially parallel to the plane of the board thereby exing said other spring arm into the other one of its switching positions and retaining said other arm in said other switching position.
- a pushbutton is secured to the other end of the actuating member and a mounting post extends from the pushbutton into a hole of the board slidable therein, and wherein a spring is interposed between the board and the pushbutton biasing the later into a position in which the actuating member is in said inactive position.
Description
March 18, 1,969 E- R- ERICSSON 3,433,914
PusHBu'rToN SWITCH Filed Oct. 25. 1967 II'UIENTOP. R\L Rlbnb. E lmsso 'BY QN.
TTQRNEYS United States Patent O 3,433,914 PUSHBUTTON SWITCH Eric R. Ericsson, Hagersten, Sweden, assignor to Telefonaktiebolaget L M Ericsson, Stockholm, Sweden, a corporation of Sweden Filed Oct. 25, 1967, Ser. No. 678,108 Claims priority, application Sweden, Feb. 24, 1967,
2,633/ 67 U.S. CI. 200-159 Int. Cl. H01h 3/12, 3/14, 13/64 6 Claims ABSTRACT F THE DISCLOSURE The present invention relates to a switching device, especially suitable for application to printed circuit boards. Such switching devices comprising push button operating means are used for instance in pushbutton sets for pulsing in telephone instruments. These pushbutton sets which must be mounted in the space provided for the conventional dial, must not be bulky, whereby the design of the device presents a problem, especially as the space available for the required contact springs is limited.
A known design uses reed contacts that are located substantially in parallel relationship to thecircuit board and conveniently secured to the same. When actuated, the movable springs make or break the contact with fixed contacts provided on the board. In this arrangement, however, it becomes necessary to use short contact springs, which has inherent disadvantages, such as a bad contact sliding at the closure moment of contact engagement, which may jeopardize an effective operation, as well as cause a relatively high deflection stress on a short spring length.
In another known construction, reed springs of U-form are mounted on a support projecting from the board, so that the arms of the U-formed springs are placed perpendicularly to the board. 'By this arrangement an increased spring length is obtained in comparison with the first-mentioned arrangement. The ends of the spring arms are inserted into holes in the board to cooperate with fixed contacts arranged on the edges of the holes. Ihe spring movement is obtained by displacement of the push button in a direction tangential to the spring. In order to obtain the required magnitude of the movement of the contact it is necessary to provide the spring with a deflection that is laterally displaced when pressing the button. This device, however, has the disadvantage that the deflection of the contact spring might cause fracture t of the spring.
The device of the invention is similar to this lastmentioned construction in that the springs are located on supports projecting vfrom the board and have contact arms that are substantially perpendicular to the board. It constitutes, however, an improvement of the known device in that the detlection length of the spring is considerably greater although the spring still occupies a reduced space. The spring furthermore is not subjected to bends that are likely to cause a fracture. These advantages are obtained by the contact springs being made of resilient 3 ,433 ,9 14 Patented Mar. 18, 1969 ICC wire and the spring arm carrying the movable contact at an intermediate portion having a coil spiral of cylindrical form, the center axis of which is parallel to the plane of the board.
These and other advantages of the invention will be understood from the following description that is made with reference to the attached drawing.
In the drawing FIGURE 1 shows an exploded view of the pushbutton mechanism and FIGURE 2 shows the position of the contact spring in three different phases of the pushbutton movement.
The pushbutton mechanism is supported by a base plate 1 of insulating material that may be common to a plurality of pushbuttons. The base plate has secured thereon an elastic support 2 for each pushbutton mechanism. A pushbutton 3 has a center shaft 4 that tits into a hole 5 in the base plate 1, which hole serves as a guide for the shaft. As an additional guiding means for the pushbutton 3 a cover plate 6 with a square hole 7 is provided, through which hole the upper square portion of the pushbutton may protrude. To mount the mechanism, the shaft 4 is inserted into the hole 5, whereafter the cover plate 6 is placed over the upper part of the pushbutton and in a convenient manner secured to the base plate 1 at a predetermined distance from the same. For holding the buttonv in an inactive position the button is provided with a helical spring 10, located on an upper part 8 of the center shaft, which spring normally pushes the button 3 upwards, so that its flange 9 rests against the bottom side of the cover plate 6.
On the bottom side of the base plate a circuit board 11 with printed4 circuits (not shown in the figure) is provided. The switching device further comprises two movable contact `springs 13 and 14, one being a mirror image of the other. The contact springs are made of resilient wire and designed to be mounted on the support 2. For this purpose they are provided 'with a coil spiral 19 at their upper part, which coil spiral fits into a recess 21 in the support 2, where it is retained without being squeezed. The recess 21 has an upper opening that is somewhat narrower than the outer diameter of the coil spiral. The coil spiral may, however, be pushed down through this opening because the support 2 is made of an elastic material.
`Each spring has at the end of one 'arm a cylindrical contact 17 for cooperation with a fixed contact '12. At an intermediate portion of this arm is provided with a coil spiral 20 which partly serves to absorb the deection stresses during the actuation of the spring and partly serves as an actuation surface for the pushbutton, thereby providing a convenient trigger point as is explained below. The other arm of the spring is straight and, when mounting the spring in the support 2, this arm is inserted into a hole 25 through the base plate 1 and the printed circuit board 11, so that this arm may be soldered to a printed circuit on the bottom side of the circuit board as shown at 15 and 16 (FIG. 2). The cylindrical contact 17 provided on the end of the other arm is inserted into another hole 26. The fixed contact 12, made in form of a wire, is located in a groove 27 in the bottom side of the base plate and has a V-formed portion 18 for cooperation with the contact 17. The wire 12 may at a convenient place cross the circuit board and be connected to a conductor on this board. a
The pushbutton is provided with an actuation member 23 for actuating the springs. The actuation member is at its lower end provided with two symmetrical curved recesses 24 for actuating the coil spirals 20 of the springs 13 and 14. At the first moment of actuation the vertical diameter of the coil spirals are practically in the same plane as the vertical side of the respective actuation member, a fact that produces the desired trigger point effect (see FIG. 2). A person pressing the pushbutton has, in order to overcome the reaction of the spring, to increase the force so that the springs are displaced laterally thereby making contact with the fixed contacts. At the moment this occurs he cannot avoid pressing down the button to its lowermost position, whereby the actuation member slides down between the coil spirals 20 Iof the contact springs, the coil spirals resting against the side surfaces 28. By this trigger point etfect a minimum length of the spring movement is obtained.
I claim:
1. A switching device for switching conductors of a printed circuit board, said switching device comprising in combination:
a printed circuit board mounting a support protruding from one side of the board;
a substantially V-shaped contact spring supported on said support straddling the same, one of the arms of the spring being connected to one of the conductors of the board and the other arm being switchable into and out of contact with another conductor and biased into one of its switching positions, said other arm having intermediate its length a spiral coil the center axis of which is substantially parallel to the plane of the board; and
an actuating member supported by said board on the side thereof mounting the support and displaceable normal to the plane of the board, said member having on one end a portion engaging said spiral coil upon depressing the actuating member from an inactive position into a predetermined depressed position with reference to the plane of the board, engagement of said portion with said spiral coil displacing the latter substantially parallel to the plane of the board thereby exing said other spring arm into the other one of its switching positions and retaining said other arm in said other switching position.
2. The switching device according to claim 1 wherein said portion of the actuating member terminates in a curved taper, the curvature of said taper mating with the outside of said spiral coil in the inactive position of the actuating member, depression of the actuating member into said predetermined depressed position causing pressure engagement of said portion with the spiral coil thereby `snapping said otherspring arm into said other switching position.
3. The switching device according to claim 2 wherein the center axis of said spiral coil and a at side wall of the actuating member portion engageable with the spiral coil are substantially disposed in a common plane normal to the plane ofthe circuit board whereby an initial depression of the actuating membercauses sliding of the curved taper surface and the outer coil surface relative to each other and continued depression of the actuating member causes a large and abrupt deflection of said other spring arm in response to a small depression movement of the actuating member.
4. The device according to claim 1 wherein a pushbutton is secured to the other end of the actuating member and a mounting post extends from the pushbutton into a hole of the board slidable therein, and wherein a spring is interposed between the board and the pushbutton biasing the later into a position in which the actuating member is in said inactive position.
S. The device according to claim 1 wherein the arms of said V`shaped contact spring are joined at the apex thereof by a second spiral coil, and wherein said support has at its upper end a recess, said second coil being received in said recess.
y6. The switching device according to claim 1 wherein said one arm of the contact spring is secured to a wire connected to said one conductor and including a V-shaped portion, said one end of the other spring arm engaging both branches of said V-shaped portion in said other switching position of the other spring arm.
References Cited UNITED STATES PATENTS 7/ 1956 Fisher 20D-166.1 XR 8/1958 Munn 20G- 166.8 XR
U.S. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE263367 | 1967-02-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3433914A true US3433914A (en) | 1969-03-18 |
Family
ID=20260343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US678108A Expired - Lifetime US3433914A (en) | 1967-02-24 | 1967-10-25 | Pushbutton switch |
Country Status (11)
Country | Link |
---|---|
US (1) | US3433914A (en) |
BE (1) | BE708752A (en) |
BR (1) | BR6794627D0 (en) |
CH (1) | CH470063A (en) |
DE (1) | DE1277981B (en) |
DK (1) | DK114211B (en) |
ES (1) | ES347235A1 (en) |
FI (1) | FI44920C (en) |
GB (1) | GB1155505A (en) |
NL (1) | NL6800655A (en) |
NO (1) | NO120587B (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3801766A (en) * | 1973-01-22 | 1974-04-02 | Valleylab Inc | Switching means for an electro-surgical device including particular contact means and particular printed-circuit mounting means |
US3860776A (en) * | 1973-07-19 | 1975-01-14 | Amp Inc | Momentary switch with wire spring components |
US3920943A (en) * | 1974-03-22 | 1975-11-18 | Magsat Corp | Electrical switch |
US3946185A (en) * | 1974-08-21 | 1976-03-23 | Intersil, Inc. | Spring wire contact assembly |
US3949181A (en) * | 1974-09-03 | 1976-04-06 | Kempf Dean R | Low profile-low bounce electrical switch apparatus |
US4092503A (en) * | 1975-12-22 | 1978-05-30 | Johan Nils Eskil Raeder | Push button switch or keyboard assembly having flexible wire contacts |
US4112284A (en) * | 1975-08-22 | 1978-09-05 | The General Electric Company Limited | Fall-through return spring arrangement for a push-button switch mechanism |
US4144430A (en) * | 1978-03-10 | 1979-03-13 | Amp Incorporated | Cantilever spring contact having integral support pin |
US4150272A (en) * | 1976-12-21 | 1979-04-17 | Telefonaktiebolaget L M Ericsson | Push button contact mechanism for use at printed circuit cards |
US4488018A (en) * | 1982-12-06 | 1984-12-11 | Hosiden Electronics Co., Ltd. | Miniature switch |
US5743382A (en) * | 1996-09-03 | 1998-04-28 | Shin Jiuh Corp. | Switch having a displaying function |
US5804786A (en) * | 1996-09-25 | 1998-09-08 | Braaten; Ronald J. | Switch operating mechanism |
US6307181B1 (en) * | 1997-04-07 | 2001-10-23 | Kenji Hashimoto | Body hair treating implement |
EP3166124A1 (en) * | 2015-11-06 | 2017-05-10 | Omron Corporation | Switch |
CN106971872A (en) * | 2015-11-06 | 2017-07-21 | 欧姆龙株式会社 | Switch |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK137586B (en) * | 1976-06-30 | 1978-03-28 | Gnt Automatic As | Pushbutton mechanism. |
DE2705914C2 (en) * | 1977-02-09 | 1982-06-16 | Siemens AG, 1000 Berlin und 8000 München | Reversing valve |
DE2948432C2 (en) * | 1979-12-01 | 1982-09-02 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Push button switch with snap action |
EP0261702A1 (en) * | 1986-08-27 | 1988-03-30 | Koninklijke Philips Electronics N.V. | Switch provided with wire-shaped contact members |
FR2615045B1 (en) * | 1987-05-06 | 1992-09-11 | Hager Electro | DEVICE FOR QUICK CONNECTION OF PRINTED CIRCUITS FOR MODULAR BOXES |
DE4016292A1 (en) * | 1990-05-21 | 1991-11-28 | Mannesmann Kienzle Gmbh | CONTACT DEVICE FOR A SWITCH |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2755346A (en) * | 1950-09-19 | 1956-07-17 | Charles P Fisher | Sensitive relay |
US2847529A (en) * | 1956-12-31 | 1958-08-12 | Ibm | Electrical contact assembly |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3244847A (en) * | 1964-05-22 | 1966-04-05 | Navigation Computer Corp | Manually operated keyboard switch in a stationary mount with guided shaftway |
-
1967
- 1967-10-24 FI FI672868A patent/FI44920C/en active
- 1967-10-25 US US678108A patent/US3433914A/en not_active Expired - Lifetime
- 1967-11-01 DE DET35161A patent/DE1277981B/en not_active Withdrawn
- 1967-11-10 BR BR194627/67A patent/BR6794627D0/en unknown
- 1967-11-14 NO NO170531A patent/NO120587B/no unknown
- 1967-11-16 ES ES347235A patent/ES347235A1/en not_active Expired
- 1967-12-29 BE BE708752A patent/BE708752A/xx unknown
- 1967-12-29 DK DK670267AA patent/DK114211B/en unknown
-
1968
- 1968-01-16 NL NL6800655A patent/NL6800655A/xx not_active Application Discontinuation
- 1968-02-20 CH CH244768A patent/CH470063A/en unknown
- 1968-02-23 GB GB9022/68A patent/GB1155505A/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2755346A (en) * | 1950-09-19 | 1956-07-17 | Charles P Fisher | Sensitive relay |
US2847529A (en) * | 1956-12-31 | 1958-08-12 | Ibm | Electrical contact assembly |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3801766A (en) * | 1973-01-22 | 1974-04-02 | Valleylab Inc | Switching means for an electro-surgical device including particular contact means and particular printed-circuit mounting means |
US3860776A (en) * | 1973-07-19 | 1975-01-14 | Amp Inc | Momentary switch with wire spring components |
US3920943A (en) * | 1974-03-22 | 1975-11-18 | Magsat Corp | Electrical switch |
US3946185A (en) * | 1974-08-21 | 1976-03-23 | Intersil, Inc. | Spring wire contact assembly |
US3949181A (en) * | 1974-09-03 | 1976-04-06 | Kempf Dean R | Low profile-low bounce electrical switch apparatus |
US4112284A (en) * | 1975-08-22 | 1978-09-05 | The General Electric Company Limited | Fall-through return spring arrangement for a push-button switch mechanism |
US4092503A (en) * | 1975-12-22 | 1978-05-30 | Johan Nils Eskil Raeder | Push button switch or keyboard assembly having flexible wire contacts |
US4150272A (en) * | 1976-12-21 | 1979-04-17 | Telefonaktiebolaget L M Ericsson | Push button contact mechanism for use at printed circuit cards |
US4144430A (en) * | 1978-03-10 | 1979-03-13 | Amp Incorporated | Cantilever spring contact having integral support pin |
US4488018A (en) * | 1982-12-06 | 1984-12-11 | Hosiden Electronics Co., Ltd. | Miniature switch |
US5743382A (en) * | 1996-09-03 | 1998-04-28 | Shin Jiuh Corp. | Switch having a displaying function |
US5804786A (en) * | 1996-09-25 | 1998-09-08 | Braaten; Ronald J. | Switch operating mechanism |
US6307181B1 (en) * | 1997-04-07 | 2001-10-23 | Kenji Hashimoto | Body hair treating implement |
EP3166124A1 (en) * | 2015-11-06 | 2017-05-10 | Omron Corporation | Switch |
CN106971873A (en) * | 2015-11-06 | 2017-07-21 | 欧姆龙株式会社 | Switch |
CN106971872A (en) * | 2015-11-06 | 2017-07-21 | 欧姆龙株式会社 | Switch |
US9947487B2 (en) | 2015-11-06 | 2018-04-17 | Omron Corporation | Switch |
Also Published As
Publication number | Publication date |
---|---|
FI44920C (en) | 1972-02-10 |
DE1277981B (en) | 1968-09-19 |
ES347235A1 (en) | 1969-01-16 |
BR6794627D0 (en) | 1973-09-18 |
GB1155505A (en) | 1969-06-18 |
CH470063A (en) | 1969-03-15 |
BE708752A (en) | 1968-05-02 |
FI44920B (en) | 1971-11-01 |
DK114211B (en) | 1969-06-09 |
NL6800655A (en) | 1968-08-26 |
NO120587B (en) | 1970-11-09 |
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