WO2003013359A1 - Tension-adjustable mechanism for stethoscope earpieces - Google Patents
Tension-adjustable mechanism for stethoscope earpieces Download PDFInfo
- Publication number
- WO2003013359A1 WO2003013359A1 PCT/CA2002/001101 CA0201101W WO03013359A1 WO 2003013359 A1 WO2003013359 A1 WO 2003013359A1 CA 0201101 W CA0201101 W CA 0201101W WO 03013359 A1 WO03013359 A1 WO 03013359A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tension
- neckpiece
- earpiece
- pivot
- adjusting
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/04—Electric stethoscopes
Definitions
- the present invention relates to a tension-adjustable mechanism for the earpieces of a stethoscope.
- the present invention also relates to a stethoscope headset comprising this mechanism.
- the two earpieces comprise respective weakened proximal end portions inserted side by side in a longitudinally movable sleeve. Longitudinal movement of the sleeve on the weakened end portions of the earpieces change the amplitude of the tension on the earpieces when these earpieces are spread apart from each other.
- a tension-adjusting mechanism for an elongated stethoscope earpiece having a proximal end comprises a stethoscope neckpiece, a pivot mechanism portion, a spring mechanism portion, and a tension-adjusting mechanism portion.
- the pivot mechanism portion is interposed between the proximal end of the earpiece and the neckpiece, and defines a pivot axis about which the earpiece pivots relative to the neckpiece.
- the spring mechanism portion is interposed between the proximal end of the earpiece and the neckpiece, and comprises a spring member which deforms upon pivoting of the earpiece about the neckpiece in an outward direction.
- Deformation of the spring member produces a tension on the earpiece opposing to further pivoting of the earpiece in the outward direction.
- the tension- adjusting mechanism portion it is interposed between the spring member and the neckpiece and defines a plurality of interchangeable point of contacts with the spring member. These points of contacts with the spring member have different positions relative to the neckpiece.
- pivot mechanism portion spring mechanism portion
- tension-adjusting mechanism portion provide for the level of versatility required to fulfill the requirements, needs and/or preferences of a wide range of users.
- the pivot mechanism portion comprises abutment surfaces restricting, by abutment, free pivotal movement of the earpiece about the neckpiece within given limits.
- the pivot mechanism portion comprises a pivot pin pivotally mounted on the neckpiece, and a pivot tube pivotally mounted on the pivot pin and connected to the proximal end of the earpiece;
- the spring member comprises a resilient blade having one end formed with the pivot pin
- the pivot tube has an open, axial slot through which the resilient blade extends when the pivot pin is inserted in that pivot tube, the resilient blade has a thickness, and the slot has a width larger than the thickness of the blade to allow limited pivotal movement of the pivot tube about the pivot pin;
- the pivot tube has an annular end face provided with a lug
- the neckpiece has a pair of abutment surfaces situated on opposite sides of the lug, and the lug abuts on either abutment surface to restrict pivotal movement of the pivot tube about the neckpiece within predetermined limits.
- the present invention further relates to a headset for electronic stethoscope, comprising first and second elongated stethoscope earpieces each having a proximal end, and the above described tension-adjusting mechanism for each elongated stethoscope earpiece.
- the stethoscope neckpiece is common to both the first and second elongated stethoscope earpieces, the neckpiece comprises a hollow shell formed with openings for the proximal ends of the earpieces, and the hollow shell comprises a front shell portion and a rear shell portion assembled together to form that hollow shell.
- the resilient blade associated to the first earpiece has a first distal end section opposite to the pivot pin;
- the resilient blade associated to the second earpiece has a second distal end section opposite to the pivot pin;
- the tension-adjusting mechanism portion associated to both the first and second earpieces comprises a tension-adjusting cam having a geometrical axis, rotatable about this geometrical axis and lockable in either first, second and third angular positions;
- the tension-adjusting cam comprises an axial member having an outer tubular surface and two first points of contact with the first and second distal end sections, respectively, formed by two points of this outer tubular surface, respectively, when the tension-adjusting cam is locked in the first angular position;
- the axial member of the tension-adjusting cam comprises, on its outer tubular surface, first and second diametrically opposite, axial and radial fins of intermediate height having respective first and second free axial edge surfaces, and two second points of contact with the first and second distal end sections, respectively, formed by these first and second free axial edge surfaces of the first fin, respectively, when the tension-adjusting cam is locked in the second angular position;
- the axial member of the tension-adjusting cam comprises, on its outer tubular surface, third and fourth geometically opposite, axial and radial fins of larger height with third and fourth free axial edge surfaces, respectively, and two third points of contact with the first and second distal end sections, respectively, formed by these third and fourth free axial edge surfaces of the second fin, respectively, when the tension-adjusting cam is locked in the third angular position;
- the neckpiece comprises a hole with peripheral notches
- the tension-adjusting cam comprises lugs engaging the peripheral notches of the hole in the neckpiece to lock the tension-adjusting cam in either the first, second and third angular positions
- the tension-adjusting mechanism associated to both the first and second earpieces comprises a spring element interposed between the neckpiece and the tension-adjusting cam and spring biasing the lugs of this tension-adjusting cam in the notches of the hole in the neckpiece, whereby, to be rotated, the tension-adjusting cam is moved against the spring-biasing force produced by the spring element to disengage the lugs from the notches and is rotated and then released to engage the lugs with other notches.
- Figure 1 is an exploded view of a headset for electronic stethoscope in accordance with the present invention
- Figure 2 is a first inner elevation view of a rear shell portion of a neckpiece of the headset of Figure 1 , showing a tension- adjusting cam in a first angular position;
- Figure 3 is an inner elevation view of a front shell portion of the neckpiece of the headset of Figure 1 ;
- Figure 4 is a second inner elevation view of the rear shell portion of the neckpiece of the headset of Figure 1, showing the tension- adjusting cam in a second angular position;
- Figure 5 is a third inner elevation view of the rear shell portion of the neckpiece of the headset of Figure 1 , showing the tension- adjusting cam in a third angular position.
- the tension-adjustable headset for electronic stethoscope is generally identified by the reference 10.
- the headset 10 comprises two earpieces 11a and 11b.
- the earpiece 11a,11b is constituted by an elongated, arched member advantageously made of slightly flexible plastic material.
- the earpiece 11a,11b comprises a distal cup-shaped end 12a, 12b to receive an earphone assembly 13a, 13b.
- the earphone assembly 13a, 13b comprises a speaker 14a, 14b, a speaker housing 15a, 15b and an eartip 16a, 16b.
- the distal cup-shaped end 12a, 12b comprises an inner shouldered, rim 17a, 17b.
- the speaker housing 15a, 15b comprises a proximal cup-shaped portion 21a,21b with an outer shouldered rim 18a, 18b.
- the shouldered rims 17a, 17b and 18a, 18b are configured to mate each other.
- the speaker housing 15a,15b finally comprises an axial, distal tube 19a, 19b with a distal, externally protruding rim 20a,20b.
- the speaker 14a, 14b is first placed in the cup-shaped end 12a, 12b of the earpiece 11 a, 11b.
- the shouldered rim 18a, 18b of the speaker housing 15a, 15b is then glued or otherwise secured to the shouldered rim 17a, 17b of the cup-shaped end 12a, 12b.
- the cup-shaped end 12a, 12b and portion 21a, 21b then define a cavity in which the speaker 14a, 14b snugly fits.
- the eartip 16a, 16b is placed on the tube 19a, 19b.
- the eartip 16a, 16b is tubular and has an inner configuration adapted to fit on the tube 19a, 19b.
- the distal, externally protruding rim 20a,20b will hold the eartip 16a, 16b on the tube 19a,19b.
- the eartip 16a, 16b is made of soft, resilient material such as foam, for ensuring comfort of the user's ear.
- the earpiece 11a,11b has a longitudinal channel 22a, 22b on the inner face of that earpiece 11a,11b.
- the shouldered rims 17a, 17b and 18a, 18b are structured to form an opening (see 23a,23b) through which the channel 22a,22b communicates with the cavity defined by the cup-shaped end 12a, 12b and portion 21a,21b when secured to each other.
- This opening 23a,23b and the channel 22a, 22b define a passage for electrical wires connected to the speaker 14a, 14b along the earpiece 11 a, 11b.
- the proximal end of the earpiece 11a,11b is provided with an integral, transversally extending pivot tube 24a,24b. Therefore, the earpiece 11a,11b and the pivot tube 24a, 24b are made of a single piece of plastic material.
- the pivot tube 24a,24b includes an annular flat face 25a,25b with a semicircular lug 26a,26b.
- the pivot tube 24a,24b has also an annular face 27a,27b from which an open, axial slot 28a, 28b extends.
- the position and width of the slot 28a, 28b corresponds to the position and length of the semicircular lug 26a,26b.
- a relatively thin wall 29a,29b is left between the inner end of the slot 28a,28b and the annular face 25a,25b.
- This spring blade 30a,30b is made of molded and resilient plastic material and has at the proximal end thereof an integral, proximal and transversally extending cylindrical pivot pin 31 a, 31b. Accordingly, the spring blade 30a,30b and the pivot pin 31a,31b are made of a single piece of plastic material.
- the spring blade 30a, 30b has a constant width but a thickness which gradually thins from the pivot pin 31a,31b to the distal end of that blade.
- the blade 30a,30b further comprises a lateral extension 32a, 32b adjacent to the pivot pin 31 a, 31b.
- the pivot pin 31 a, 31b has a semicircular groove 33a, 33b.
- the pivot pin 31 a, 31b is inserted in the pivot tube 24a,24b, with the blade 30a,30b including the lateral extension 32a,32b extending through the slot 28a,28b.
- the width of the blade 30a, 30b and lateral extension 32a, 32b is equal to the length of the slot 28a,28b.
- the width of the slot 28a,28b is larger that the thickness of the blade 30a,30b whereby free pivotal movement of the pivot tube 24a,24b about the pivot pin 31 a, 31b is allowed within predetermined limits.
- the electrical wires connected the speaker 14a, 14b and running through the channel 22a,22b leave the channel 22a,22b at the proximal end of the earpiece 11a,11b through a first hole 37a, 37b in the pivot tube 24a, 24b, the semicircular groove 33a, 33b in the pivot pin 31a,31b, and a hole 38a, 38b in the pivot tube 24a,24b to thereby reach the inside of a shell 35,36 of a neckpiece 34, common to the two earpieces 11a and 11b.
- the headset 10 comprises the stethoscope neckpiece 34 of which the shell 35,36 comprises a rear triangular shell portion 35 and a front triangular shell portion 36.
- the triangular shell portions 35 and 36 define an opening 39a,39b at an upper corner thereof and through which the proximal end of the earpiece 11a,11b and the pivot tube 24a,24b extend.
- the shell portion 36 comprises an inner cylindrical blind hole 40a,40b to receive a first end of the pivot pin 31a,31b.
- the shell portion 35 comprises an inner cylindrical blind hole 41a,41b ( Figure 3) coaxial with blind hole 40a,40b and receiving the second end of pivot pin 31 a, 31b.
- the pivot pin 31a,31b is free to pivot in the blind holes 40a,40b and 41a,41b. Pivotal movement of the pivot pin 31a,31b in the coaxial blind holes 40a,40b and 41a,41b is restricted within a given angle, that is within predetermined limits by the semicircular lug 26a,26b which abuts on faces 42a,42b and 43a,43b situated on opposite sides of the lug 26a,26b.
- pivot pin 31a,31b, the pivot tube 24a,24b, and the cylindrical blind holes 40a,40b and 41a,41b define a pivot axis about which the earpiece 11a,11b pivots relative to the neckpiece 34.
- the shell portion 36 further comprises a lower cylindrical hole 44 defining an inwardly extending cylindrical wall 45 having an inner annular edge formed with three 60° spaced apart pairs of diametrically opposite notches such as 46.
- a tension-adjusting cam 47 is disposed in the cylindrical hole 44 and is rotatable about its geometrical axis.
- Cam 47 comprises a circular flat wall 48 and an outer cylindrical wall 89 inwardly extending from the periphery of the circular flat wall 48 and having an annular edge surface formed with a pair of diametrically opposite and outwardly radially extending lugs 49.
- Cam 47 finally comprises a central inner tube 50 coaxial with the cylindrical wall 89 and inwardly extending from the flat wall 48.
- the shell portion 36 further comprises pegs 54 to receive a printed circuit board 53.
- the printed circuit board 53 comprises corresponding notches and/or holes such as 55 to receive the pegs 54.
- the electric wires from hole 38a and 38b can be connected to this printed circuit board 53.
- the shell portion 35 comprises holes 62 and 63 for receiving push-buttons 64 and 65, respectively.
- Push-buttons 62 and 63 operate corresponding switches such as 66 mounted on the printed circuit board.
- the headset 10 further comprises a T-shaped anchor 56 formed of a transversal section 57 and a vertical tube 58 perpendicular to section 57.
- the tube 58 fits in a bottom opening of the shell 35,36. This bottom opening is formed by semi-cylindrical opening portion 60 ( Figure 3) of shell portion 35 and semi-cylindrical opening portion 61 ( Figures 1 and 4) of shell portion 36.
- the section 57 it is shaped to fit inside the shell portions 35 and 36 just above the bottom opening 60,61.
- wires from the printed circuit board 53 can run toward the exterior through a hole 59 in the transversal section 57 and then through the tube 58.
- the outer surface of the tube 58 is structured to connect to a biological or other sound sensor (not shown).
- the shell portion 35 comprises four holes 67 for receiving four screws 68.
- the shell portion 35 comprises four threaded holes 69 in which the four screws 68 are screwed upon assembling the shell portions 35 and 36 together.
- the shell portion 35 comprises, as shown in Figure 3, an inwardly extending tube 70 in which a coil spring 71 is installed.
- the tube 70 is inserted in tube 50 through a circular hole 73 in the printed circuit board 53, whereby the coil spring extends in both tubes 50 and 70 to push and hold (spring bias) the lugs 49 in one pair of notches 46 and therefore the cam 47 in position in the cylindrical hole 44.
- the cam 47 To rotate the cam 47 and displace the diametrically opposite lugs 49 from one pair of diametrically opposite notches 46 to the other, one has only to push from the outside the cam 47 until the lugs 49 are withdrawn form the notches
- the outside face of the circular flat wall 48 can be grooved along a diameter in the same manner as the head of a screw. A coin can then be used in cooperation with this groove (not shown) to facilitate this operation.
- Cam 47 is positioned in cylindrical hole 44 from the inside of the shell half 36 with the pair of diametrically opposite lugs 49 inserted in one of the pair of diametrically opposite notches 46;
- pivot pin 31a is disposed in pivot tube 24a, with the blade 30a and lateral extension 32a in the slot 28a and with the blade 30a lying on the same side of the tube 50 as blind hole 40a;
- the pivot pin 31b is disposed in pivot tube 24b, with the blade 30b and lateral extension 32b in the slot 28b and with the blade 30a lying on the same side of tube 50 as blind hole 40b;
- pivot pin 31b The corresponding end of pivot pin 31b is positioned in blind hole 40b;
- the push-buttons 64 and 65 are placed in the holes 62 and 63, respectively;
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/907,796 | 2001-07-18 | ||
US09/907,796 US6595316B2 (en) | 2001-07-18 | 2001-07-18 | Tension-adjustable mechanism for stethoscope earpieces |
Publications (1)
Publication Number | Publication Date |
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WO2003013359A1 true WO2003013359A1 (en) | 2003-02-20 |
Family
ID=25424645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2002/001101 WO2003013359A1 (en) | 2001-07-18 | 2002-07-17 | Tension-adjustable mechanism for stethoscope earpieces |
Country Status (2)
Country | Link |
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US (1) | US6595316B2 (en) |
WO (1) | WO2003013359A1 (en) |
Cited By (1)
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WO2024040723A1 (en) * | 2022-08-23 | 2024-02-29 | 金岚芸 | Innovatively-designed stethoscope |
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Citations (2)
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---|---|---|---|---|
US882700A (en) * | 1907-05-13 | 1908-03-24 | George A Lewis | Hearing-tube for sound-reproducing devices. |
US4277654A (en) * | 1978-04-17 | 1981-07-07 | U.S. Philips Corporation | Stethoscopic headphone set |
Family Cites Families (7)
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US3630308A (en) * | 1969-05-28 | 1971-12-28 | Abe Ravin | Stethoscope |
US3746124A (en) * | 1971-12-21 | 1973-07-17 | R Wilson | Adjustable binaural tube assembly |
US4149610A (en) * | 1976-09-10 | 1979-04-17 | Instrument Systems Corporation | Acoustic headsets |
US4406346A (en) * | 1982-04-12 | 1983-09-27 | Marvin A. Clark | Stethoscope with one-handed headset operation |
US4783822A (en) | 1986-08-08 | 1988-11-08 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Multi-adjustable headband |
US5561275A (en) | 1994-04-28 | 1996-10-01 | Delstar Services Informatiques (1993) Inc. | Headset for electronic stethoscope |
US5862241A (en) | 1996-05-03 | 1999-01-19 | Telex Communications, Inc. | Adjustable headset |
-
2001
- 2001-07-18 US US09/907,796 patent/US6595316B2/en not_active Expired - Fee Related
-
2002
- 2002-07-17 WO PCT/CA2002/001101 patent/WO2003013359A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US882700A (en) * | 1907-05-13 | 1908-03-24 | George A Lewis | Hearing-tube for sound-reproducing devices. |
US4277654A (en) * | 1978-04-17 | 1981-07-07 | U.S. Philips Corporation | Stethoscopic headphone set |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024040723A1 (en) * | 2022-08-23 | 2024-02-29 | 金岚芸 | Innovatively-designed stethoscope |
Also Published As
Publication number | Publication date |
---|---|
US20030015368A1 (en) | 2003-01-23 |
US6595316B2 (en) | 2003-07-22 |
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