JP2014149219A - Push button structure and timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a push button structure and a timepiece which prevent penetration of foreign matters and are capable of improving operability of a button member.SOLUTION: In a push button structure, a shaft insertion cylinder part 14 of a cylindrical member 11 is inserted to a through hole 10 of a wristwatch case 1, and a button shaft part 20 of a button member 12 is inserted to the shaft insertion cylinder part 14 of the cylindrical member 11, and a button head part 21 of the button member 12 is inserted to a button insertion cylinder part 15 of the cylindrical member 11, and the button member 12 is urged in such a direction as to be pushed out, by a coil spring 13. A waterproof ring 24 is provided on an outer peripheral surface of the button head part 21, and a press-contact surface 26 with which the waterproof ring 24 is brought into press contact when the button member 12 is moved in such the direction as to be pushed out, and a release surface 27 which releases press contact of the waterproof ring 24 when the button member 12 is moved in such a direction as to be pushed in are provided in an inner peripheral surface of the button insertion cylinder part 15. Consequently, the waterproof ring 24 is brought into press contact with the press-contact surface 26 to prevent penetration of foreign matters, and the waterproof ring 24 is moved to the release surface 27 to release the press contact of the waterproof ring 24 to the press-contact surface 26.

Description

  The present invention relates to a push button structure used for an electronic device such as a timepiece and a timepiece having the same.

  For example, in the pushbutton structure of a wristwatch, as described in Patent Document 1, a through hole is provided in a wristwatch case, and a button shaft portion of a button member is slidably inserted into the through hole, and this button shaft portion is inserted into the button shaft portion. By projecting the provided button head to the outside of the watch case and pushing in the projected button head, the switch portion in the watch case is pressed at the end of the button shaft portion located in the watch case. What is composed is known.

JP 2007-256067 A

  In this case, the through hole of the watch case has a shaft hole portion into which the button shaft portion of the button member is inserted, and a head hole portion into which the button head portion is inserted so as to be able to appear and retract. An auxiliary pipe is provided in the shaft hole portion of the through hole, and a button shaft portion is inserted into the auxiliary pipe through a waterproof packing. In addition, a coil spring that urges the button head toward the outside of the watch case is provided on the outer periphery of the button shaft that is located between the head hole of the through hole and the button head of the button member. Has been placed. Further, a retaining member for preventing the button member from coming out of the wristwatch case is attached to an end portion of the button shaft portion protruding into the wristwatch case.

  In such a push button structure, the button head of the button member is normally pushed out by the spring force of the coil spring and protrudes from the head hole of the through hole to the outside of the watch case. When pushed against the spring force, the button shaft slides in the auxiliary pipe provided in the shaft hole of the through hole of the watch case, and the button head is inserted into the head hole of the through hole, The end portion of the button shaft portion is configured to press the switch portion in the watch case to perform a switch operation.

  However, in such a push button structure, when the button head of the button member is pushed out by the spring force of the coil spring and protrudes from the head hole of the through hole to the outside of the watch case, Since there is a gap between the hole and the button head of the button member, foreign matter such as sand, mud, and dust enters the head hole of the through hole from this gap, and the operability of the button member is affected by this foreign matter. There is a problem of lowering.

  The problem to be solved by the present invention is to provide a push button structure and a timepiece capable of preventing entry of foreign matter and improving the operability of the button member.

The present invention includes a case having a through hole, a cylindrical member having a shaft insertion cylindrical portion inserted into the through hole of the case, and a button insertion cylindrical portion positioned outside the case, and the cylindrical member A button member having a button shaft portion slidably inserted into the shaft insertion tube portion, a button head portion slidably inserted into the button insertion tube portion, and a biasing member for urging the button member in a pushing direction. ,
A waterproof ring is annularly provided on one of the outer peripheral surface of the button head of the button member and the inner peripheral surface of the button insertion tube portion of the cylindrical member, and the button head of the button member The other of the outer peripheral surface of the cylindrical member and the inner peripheral surface of the button insertion tube portion of the tubular member is a pressure contact surface to which the waterproof ring is pressed when the button member moves in the pushing direction, and the button member The push button structure is provided with a release surface on which the waterproof ring slides when the waterproof ring is released when the waterproof ring is moved in the pushing direction.

  According to this invention, when the button member is moved in the pushing direction by the urging force of the urging member, the waterproof ring can be brought into pressure contact with the pressure contact surface. Foreign matter can be reliably prevented from entering, and when the button member is pushed against the biasing force of the biasing member, the waterproof ring is moved to the release surface and the waterproof ring against the pressure contact surface is moved. Since the pressure contact can be released, the waterproof ring can be smoothly slid, and thus the operation load of the button member can be reduced, so that the operability of the button member can be improved.

It is the enlarged front view which showed the principal part in one Embodiment which applied this invention to the wristwatch. It is an expanded sectional view of the principal part in the AA arrow of the wristwatch shown in FIG. FIG. 3 is an enlarged cross-sectional view showing a portion B of the pushbutton switch shown in FIG. FIG. 3 is an enlarged cross-sectional view of a main part showing a state where a button member of the push button switch shown in FIG. 2 is pushed into a watch case. FIG. 5 is an enlarged cross-sectional view showing a portion C of the pushbutton switch shown in FIG. 4. FIG. 6 is an enlarged cross-sectional view of a main part showing a first modification of the release surface of the pushbutton switch shown in FIG. 5. It is an expanded sectional view of the important section showing the 2nd modification of the pushbutton switch shown in FIG.

Hereinafter, an embodiment in which this invention is applied to a wristwatch will be described with reference to FIGS.
As shown in FIG. 1, the wristwatch includes a wristwatch case 1. Band attachment portions 2 are respectively provided on the side surfaces of the wristwatch case 1 on the 12 o'clock side and the 6 o'clock side (not shown). Further, a push button switch 3 is provided on the side surface portion of the wristwatch case 1 on the 3 o'clock side.

  As shown in FIGS. 1 and 2, a watch glass 4 is attached to the upper opening of the watch case 1 via a packing 4a. A back cover 5 is attached to the lower part of the watch case 1 via a waterproof ring 5a. Further, a watch module 6 is provided inside the watch case 1. The timepiece module 6 includes various parts (not shown) necessary for a timepiece function such as a dial plate and a circuit board.

  By the way, as shown in FIGS. 1 to 5, the push button switch 3 performs a switch operation in response to a pressing operation. The push button portion 7 provided in the watch case 1 and the switch portion provided in the timepiece module 6. 8 and. The push button portion 7 includes a cylindrical member 11 that is inserted and fixed in a through hole 10 provided in the watch case 1, a button member 12 that is slidably inserted into the cylindrical member 11, and the button member 12. And a coil spring 13 that is urged in the pushing direction.

  In this case, as shown in FIGS. 2 and 4, the through hole 10 of the watch case 1 is formed in a stepped shape having a small-diameter hole 10a provided on the watch case 1 side. The cylindrical member 11 includes a shaft insertion cylinder portion 14 that is inserted into the through hole 10 of the watch case 1 and a button insertion cylinder portion 15 that is located outside the watch case 1.

  As shown in FIGS. 2 and 4, the shaft insertion tube portion 14 of the tubular member 11 has a small diameter tube portion 14 a whose outer peripheral surface is inserted into the small diameter hole portion 10 a of the through hole 10 and protrudes into the watch case 1. And a large-diameter cylindrical portion 14b that is inserted into the through hole 10 and located at the outer end of the watch case 1 is formed in a stepped shape. In this case, a plurality of waterproof packings 14c are annularly provided on the outer peripheral surface of the large-diameter cylindrical portion 14b.

  As shown in FIGS. 2 and 4, the waterproof packing 14 c is formed in a ring shape, and is configured such that its outer peripheral surface is in pressure contact with the inner peripheral surface of the through hole 10 to ensure airtightness. In addition, holes having the same inner diameter are continuously formed inside the small diameter cylindrical portion 14a and the large diameter cylindrical portion 14b. Then, the inner end of the shaft insertion tube 14, that is, the inner end of the shaft insertion tube 14 located in the watch case 1, is used to fix the cylindrical member 11 in the through hole 10 of the watch case 1. A retaining ring 16 is attached.

  Further, as shown in FIGS. 2 and 4, the button insertion cylinder portion 15 of the cylindrical member 11 is formed in a cylindrical shape having an outer diameter sufficiently larger than the outer diameter of the shaft insertion cylinder portion 14. 1 is arranged via a neck portion 17 outside. An insertion hole 18 into which a button head 21 (described later) of the button member 12 is inserted is formed inside the button insertion cylinder portion 15. Further, the neck portion 17 is formed to be larger than the outer diameter of the shaft insertion tube portion 14 and smaller than the outer diameter of the button insertion tube portion 15, and is configured such that its inner end surface comes into contact with the outer surface of the watch case 1. ing.

  On the other hand, as shown in FIGS. 2 and 4, the button member 12 includes a button shaft portion 20 that is slidably inserted into the shaft insertion tube portion 14 of the tubular member 11, and a button insertion tube portion 15 of the tubular member 11. The button head 21 is slidably inserted into the insertion hole 18. A plurality of waterproof packings 20 a are respectively provided in an annular shape on the outer peripheral surface of the button shaft portion 20. The waterproof packing 20a is formed in a ring shape and is configured to slide along the axial direction in a state where the outer peripheral surface thereof is in pressure contact with the inner peripheral surface of the shaft insertion cylinder portion 14.

  Further, as shown in FIGS. 2 and 4, the button shaft portion 20 has an inner end portion protruding from the shaft insertion tube portion 14 of the cylindrical member 11 into the watch case 1 and an outer end portion thereof being the cylindrical member 11. It is configured to protrude from the shaft insertion tube portion 14 into the button insertion tube portion 15. In this case, a retaining ring 22 for preventing the button member 12 from slipping out of the watch case 1 is attached to the inner end portion of the button shaft portion 20.

  On the other hand, as shown in FIGS. 2 and 4, the button head 21 has a cap shape having an outer diameter substantially the same as the inner diameter of the insertion hole 18 provided in the button insertion cylinder portion 15 of the cylindrical member 11. Is formed. The axial length of the button head 21 is slightly longer than the depth of the button insertion cylinder 15 in the insertion hole 18, that is, the axial length of the insertion hole 18. Thus, the button shaft portion 21 is configured such that the outer end portion thereof always protrudes outward from the button insertion tube portion 15.

  Further, as shown in FIGS. 2 and 4, the button head portion 21 is formed with a shaft portion 23 at the center of the shaft, and the outer end portion of the button shaft portion 20 is formed at the inner end portion of the shaft portion 23. They are integrally connected, and are configured to rotate and slide together with the button shaft portion 20. In this case, the outer diameter of the shaft portion 23 is formed larger than the outer diameter of the button shaft portion 20.

  As shown in FIGS. 2 and 4, the button member 12 is configured to be urged in a direction to be pushed out of the watch case 1 by the spring force of the coil spring 13. That is, the coil spring 13 is formed on the button shaft portion 14 positioned between the inner end surface of the shaft portion 23 of the button head portion 21 of the button member 12 and the outer end surface of the neck portion 16 of the button insertion tube portion 15 of the tubular member 11. It is arranged on the outer periphery.

  Thus, as shown in FIG. 2, the button member 12 is urged and pushed in the direction of being pushed toward the outside of the watch case 1 by the spring force of the coil spring 13 in the normal state. The retaining ring 22 attached to the inner end portion 20 is configured to abut against the inner end portion of the shaft insertion tube portion 14 of the tubular member 11 so that the pushing position is regulated.

  Further, as shown in FIG. 4, when the button head 21 is pushed toward the inside of the wristwatch case 1 against the spring force of the coil spring 13, the button head 21 is cylindrical. The button shaft 20 is pushed into an insertion hole 18 provided in the button insertion cylinder 15 of the cylindrical member 11, and the button shaft 20 slides in the shaft insertion cylinder 14 of the cylindrical member 11, The end portion is pushed into the wristwatch case 1, and the inner end portion of the pushed button shaft portion 20 is configured to press the switch portion 8 of the timepiece module 6 to perform a switch operation.

  In this case, as shown in FIG. 2 and FIG. 4, the switch portion 8 is provided on the side portion located at the 3 o'clock side of the timepiece module 6, and the button head portion 21 of the button member 12 When pushed against the inside of the watch case 1, the inner end portion of the button shaft portion 20 is pushed into the watch case 1, and is pressed by the inner end portion of the pushed button shaft portion 20. The switch is configured to operate.

  Incidentally, a waterproof ring 24 is annularly provided on the outer peripheral surface of the button head 21 as shown in FIGS. The waterproof ring 24 is made of an elastic material such as rubber and has a ring shape with a circular cross section. The waterproof ring 24 is configured such that the outermost peripheral portion projects from the outer peripheral surface of the button head 21 in a state where the waterproof ring 24 is fitted in an annular groove 25 formed on the outer peripheral surface of the button head 21. Yes.

  On the other hand, on the inner peripheral surface of the insertion hole 18 in the button insertion cylinder portion 15 of the cylindrical member 11, as shown in FIGS. A pressure contact surface 26 with which the outer peripheral portion is pressed, and a release surface 27 for releasing the pressure contact of the waterproof ring 24 and sliding the waterproof ring 24 when the button member 11 is moved in the pushing direction are provided.

  In this case, as shown in FIGS. 2 to 5, the press contact surface 26 is provided on the outer side (the left side in FIG. 2) of the watch case 1 in the insertion hole 18 of the button insertion cylinder portion 15 of the cylindrical member 11. It is an inner peripheral surface, and the inner diameter thereof is substantially the same as or slightly smaller than the outer diameter of the button head portion 21 of the button member 12.

  2 to 5, the release surface 27 is an inner peripheral surface provided on the watch case 1 side (right side in FIG. 2) in the insertion hole 18 of the button insertion tube portion 15 of the tubular member 11. The inner diameter of the button member 12 is slightly larger than the outer diameter of the waterproof ring 24 provided on the outer peripheral surface of the button head 21.

  Further, as shown in FIGS. 2 to 5, a stepped portion 28 is formed at the boundary between the pressure contact surface 26 and the release surface 27. The step portion 28 is formed on an inclined surface that is inclined from the inner end portion of the pressure contact surface 26 located outside the watch case 1 toward the outer end portion of the release surface 27 located on the watch case 1 side.

  Accordingly, the waterproof ring 24 is gradually pressed from the release surface 27 along the inclined surface of the step portion 28 when the button member 11 is pushed out by the spring force of the coil spring 13 as shown in FIGS. It is configured to move to the pressure contact surface 26 and press-contact while the force increases. Further, as shown in FIGS. 4 and 5, the waterproof ring 24 extends from the pressure contact surface 26 along the inclined surface of the step portion 28 when the button member 11 is pushed against the spring force of the coil spring 13. While the pressure contact force is gradually reduced, it moves to the release surface 27 to release the pressure contact force, and in this state, it is configured to slide along the release surface 27 in a non-contact state.

Next, the operation of the push button switch 3 of such a wristwatch will be described.
As shown in FIGS. 2 and 3, the push button switch 3 pushes the button member 12 toward the outside of the watch case 1 by the spring force of the coil spring 13 in a normal state. That is, when the button member 12 is pushed out by the spring force of the coil spring 13, the button shaft portion 20 of the button member 12 slides inside the shaft insertion tube portion 14 of the tubular member 11, and the button head portion 21 is moved to the tube. The inside of the insertion hole 18 of the button insertion cylinder part 15 of the shaped member 11 is slid and pushed out.

  At this time, the waterproof packing 20a of the button shaft portion 20 of the button member 12 slides in a state of being pressed against the inner peripheral surface of the shaft insertion tube portion 14 of the cylindrical member 11, and is attached to the inner end portion of the button shaft portion 20. The retaining ring 22 is brought into contact with the inner end portion of the shaft insertion tube portion 14 of the tubular member 11 so that the push-out position of the button member 12 is restricted. Further, at this time, the outermost peripheral portion of the waterproof ring 24 provided on the outer peripheral surface of the button head portion 21 is the boundary portion between the press contact surface 26 and the release surface 27 provided on the inner peripheral surface of the button insertion cylinder portion 21. When climbing over the stepped portion 28, the waterproof ring 24 moves to and comes into pressure contact with the pressure contact surface 26 while gradually increasing the pressure contact force along the inclined surface of the stepped portion 28.

  In this state, the outer peripheral portion of the waterproof ring 24 is in pressure contact with the press-contact surface 26 of the button insertion tube portion 21, so that the outer peripheral surface of the button head 21 of the button member 12 and the button insertion tube portion 21 of the tubular member 11. Even if there is a gap between the insertion hole 18 and the inner peripheral surface of the insertion hole 18, the gap is sealed by the waterproof ring 24. For this reason, foreign matters such as sand, mud, and dust enter the insertion hole 18 of the button insertion cylinder portion 21 from the gap between the outer peripheral surface of the button head portion 21 and the inner peripheral surface of the insertion hole 18 of the button insertion cylinder portion 21. Can be surely prevented from entering.

  On the other hand, when the button head portion 21 of the button member 12 is pushed toward the inside of the watch case 1 against the spring force of the coil spring 13, the button shaft portion 20 of the button member 12 is shown in FIGS. Slides in the shaft insertion cylinder portion 14 of the cylindrical member 11, and the button head 21 is slid into the insertion hole 18 of the button insertion cylinder portion 15 of the cylindrical member 11. As a result, the inner end portion of the button shaft portion 20 of the button member 12 protrudes toward the timepiece module 6 in the wristwatch case 1, and the inner end portion of the projected button shaft portion 20 presses the switch portion 8 of the timepiece module 6. Switch operation.

  At this time, the waterproof packing 20 a of the button shaft portion 20 of the button member 12 slides in a state of being pressed against the inner peripheral surface of the shaft insertion tube portion 14 of the tubular member 11. Further, at this time, the outermost peripheral portion of the waterproof ring 24 provided on the outer peripheral surface of the button head portion 21 is the boundary portion between the press contact surface 26 and the release surface 27 provided on the inner peripheral surface of the button insertion cylinder portion 21. When climbing over the stepped portion 28, the waterproof ring 24 moves to the release surface 27 while gradually reducing the pressure contact force along the inclined surface of the stepped portion 28, and the pressure contact force of the waterproof ring 24 is released.

  For this reason, when the button head portion 21 of the button member 12 is pushed toward the inside of the watch case 1 against the spring force of the coil spring 13, the pressure contact force of the waterproof ring 24 follows the inclined surface of the step portion 28. The water-proof ring 24 slides smoothly. In this case, since the waterproof ring 24 slides in a non-contact state with respect to the release surface 27, the operation load of the button member 12 is reduced, and the operability of the button member 12 is improved.

  As described above, according to the push button structure of the wristwatch, the shaft insertion tube portion 14 of the cylindrical member 11 is inserted into the through hole 10 of the watch case 1, and the button shaft portion of the button member 12 is inserted into the shaft insertion tube portion 14. 20 is slidably inserted, and the button head portion 21 of the button member 12 is slidably inserted into the button insertion tube portion 21 of the tubular member 11. In this state, the button member 12 is pushed out by the coil spring 13. An energized push button structure is provided with a waterproof ring 24 on the outer peripheral surface of the button head 21, and when the button member 12 moves in the direction in which the button member 12 is pushed out, the waterproof ring 24 Is provided with a pressure-contact surface 26 that is in pressure-contact with and a release surface 27 that releases the pressure-contact of the waterproof ring 24 and slides when the button member 12 is moved in the pushing direction. Intrusion of the button member 12 It is possible to improve the work of.

  That is, in this push button structure, when the button member 12 is moved in the pushing direction by the spring force of the coil spring 13, the waterproof ring 24 of the button head 21 is brought into contact with the pressure contact surface 26 of the button insertion tube portion 15 of the tubular member 11. Therefore, even if there is a gap between the button head 21 and the button insertion cylinder 15, this gap can be sealed by the waterproof ring 24, so that the button insertion cylinder 15 can be sealed in the button insertion cylinder 15. Foreign objects such as sand, mud, and dust can be reliably prevented from entering.

  In this push button structure, the waterproof ring 24 of the button head 21 moves to the release surface 27 of the button insertion cylinder 15 when the button member 12 moves in the direction in which it is pushed against the spring force of the coil spring 13. Thus, the pressure-contact of the waterproof ring 24 against the pressure-contact surface 26 of the button insertion cylinder portion 15 can be released, so that the waterproof ring 24 can be smoothly slid, thereby reducing the operation load on the button member 12. Therefore, the operability of the button member 12 can be improved.

  In this case, the step member 28 is inclined at the boundary between the pressure contact surface 26 and the release surface 27 of the button insertion cylinder 15, so that the button member 11 is pushed out by the spring force of the coil spring 13. At this time, since the waterproof ring 24 can be gradually moved from the release surface 27 along the inclined surface of the stepped portion 28, the waterproof ring 24 is moved to the pressure contact surface 26 while gradually increasing the pressure contact force of the waterproof ring 24. The gap between the button head 21 and the button insertion cylinder portion 15 can be reliably sealed by the waterproof ring 24.

  Further, when the button member 11 is pushed against the spring force of the coil spring 13, the waterproof ring 24 can be gradually moved from the pressure contact surface 26 along the inclined surface of the stepped portion 28. While the pressure contact force of 24 is gradually reduced, the waterproof ring 24 can be moved to the release surface 27 to release the pressure contact force, and thus the waterproof ring 24 can be smoothly slid. The operability can be further improved.

  Further, in this push button structure, the coil spring 13 is disposed on the outer periphery of the button shaft portion 20 located between the button head portion 21 of the button member 12 and the button insertion tube portion 15 of the tubular member 11, The button member 12 can be urged in the direction of pushing out reliably and satisfactorily along the axial direction of the button shaft portion 20. In this case, since the button head portion 21 is provided with a shaft portion 23 having an outer diameter larger than the outer diameter of the button shaft portion 20, the outer end portion of the coil spring 13 is elastically applied to the inner end surface of the shaft portion 23. Accordingly, the coil spring 13 can be arranged in a stable state.

  Further, in this push button structure, a retaining ring 22 for preventing the button member 12 from coming out of the watch case 1 is provided at the end of the button shaft portion 20 of the button member 12 protruding into the watch case 1. Therefore, even if the spring force of the coil spring 13 is increased in order to securely press the waterproof ring 24 against the pressure contact surface 26 of the button insertion cylinder portion 21, the retaining ring 22 of the button member 12 can be secured to the cylindrical member 11. Since the push-in position of the button member 12 is regulated, the button member 12 can be reliably prevented from coming out of the watch case 1 because the push-in position of the button member 12 can be regulated. it can.

  Further, in this push button structure, a waterproof packing 20 a that slides in pressure contact with the inner peripheral surface of the shaft insertion tube portion 14 of the tubular member 11 is provided in an annular shape on the outer peripheral surface of the button shaft portion 20 of the button member 12. Therefore, even if there is a gap between the outer peripheral surface of the button shaft portion 20 of the button member 12 and the inner peripheral surface of the shaft insertion tube portion 14 of the cylindrical member 11, the gap is sealed with the waterproof packing 20a. As a result, water or the like can be surely prevented from entering the wristwatch case 1, so that waterproofness can be ensured.

  In the above-described embodiment, the case where the waterproof ring 24 is configured to slide in the non-contact state along the release surface 27 of the button insertion cylinder portion 15 is described. As in the first modification, the inner surface of the release surface 30 is formed with the same diameter as the outermost diameter of the waterproof ring 24 provided on the outer peripheral surface of the button head 21 of the button member 12. You may comprise so that it may slide in the state which contacted the outermost peripheral part, without making it press-contact with the release surface 30 of the button insertion cylinder part 15. FIG.

  With this configuration, the outermost peripheral portion of the waterproof ring 24 comes into contact with the release surface 30 of the button insertion cylinder portion 15 and slides, so that the button member 12 resists the spring force of the coil spring 13 and the wristwatch. When pushed into the inside of the case 1, foreign matter such as sand, mud, and dust enters the button insertion cylinder portion 21 from the gap between the outer peripheral surface of the button head portion 21 and the release surface 30 of the button insertion cylinder portion 21. Can be prevented from entering.

  In this case, foreign matters such as sand, mud, and dust enter between the outer peripheral surface of the button head 21 located on the outer side of the wristwatch case 1 with respect to the waterproof ring 24 and the release surface 30 of the button insertion cylinder portion 21. However, when the button member 12 is pushed out by the spring force of the coil spring 13, foreign matter such as sand, mud, and dust that has entered is pushed out between the pressure contact surface 26 and the outer peripheral surface of the button head 21 by the prevention ring 24. Therefore, the operability of the button member 12 can be improved over a long period of time.

  Further, in the above-described embodiment, the waterproof ring 24 is provided on the outer peripheral surface of the button head 21 of the button member 12, and the press contact surface on which the waterproof ring 24 is pressed against the inner peripheral surface of the button insertion tube portion 15 of the tubular member 11. 26 and the release surface 27 for releasing the pressure contact of the waterproof ring 24 have been described. However, the present invention is not limited to this. For example, as in the second modification shown in FIG. An annular groove 25 is provided on the inner peripheral surface of the portion 15, and a waterproof ring 31 is provided in the annular groove 25 so as to protrude to the inner peripheral side, and the waterproof ring 31 is pressed against the outer peripheral surface of the button head 21 of the button member 12. The structure which provided the press-contact surface 32 and the cancellation | release surface 33 which cancels | releases the press-contact of the waterproof ring 31 may be sufficient.

  In this case, a pressure contact surface 32 is provided on the outer peripheral surface of the button head 21 of the button member 12 positioned on the wristwatch case 1 side, and the outer peripheral surface of the button head 21 of the button member 12 positioned on the outer side of the wristwatch case 1. It is sufficient to provide the release surface 33. Further, the stepped portion 34 may be inclined and provided at the boundary between the pressure contact surface 32 and the release surface 33 on the outer peripheral surface of the button head 21. Even if comprised in this way, there exists an effect similar to embodiment mentioned above.

  In the above-described embodiment, the case where the coil spring 13 is used as the biasing member has been described. However, the coil spring 13 is not necessarily used, and a spring member such as a leaf spring may be used. An elastic member may be used.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to a wristwatch has been described. However, the present invention is not necessarily a wristwatch. The present invention can be widely applied not only to watches but also to electronic devices having pushbutton switches.

As mentioned above, although one Embodiment of this invention and each 1st, 2nd modification were demonstrated, this invention is not restricted to these, The invention described in the claim, and its equivalent range Is included.
The invention described in the claims of the present application will be appended below.

(Appendix)
The invention according to claim 1 includes a case having a through hole, a cylindrical member having a shaft insertion cylinder part inserted into the through hole of the case, and a button insertion cylinder part located outside the case, and A button member having a button shaft portion that is slidably inserted into the shaft insertion tube portion of the tubular member and a button head portion that is slidably inserted into the button insertion tube portion, and an urging force for pushing the button member in a pushing direction. A force ring member, and a waterproof ring is annularly provided on one of an outer peripheral surface of the button head of the button member and an inner peripheral surface of the button insertion tube portion of the tubular member, and the button On the other of the outer peripheral surface of the button head portion of the member and the inner peripheral surface of the button insertion tube portion of the cylindrical member, the pressure contact surface to which the waterproof ring presses when the button member moves in the pushing direction And the waterproof ring when the button member is moved in the pushing direction. The waterproof ring to release the pressure contact is push button structure, wherein a and releasing surface that slides are provided.

  According to a second aspect of the present invention, in the push button structure according to the first aspect, the waterproof ring is provided on an outer peripheral surface of the button head of the button member, and the press contact surface and the release surface are The push button structure is provided on an inner peripheral surface of the button insertion tube portion of the tubular member.

  According to a third aspect of the present invention, in the pushbutton structure according to the first or second aspect, the release surface of the button insertion cylinder portion slides in a state in which the waterproof ring is in contact. Structure.

  According to a fourth aspect of the present invention, in the push button structure according to any one of the first to third aspects, a stepped portion is inclined at a boundary portion between the pressure contact surface and the release surface. The push button structure is characterized by this.

  According to a fifth aspect of the present invention, in the push button structure according to any one of the first to fourth aspects, the urging member is a coil spring, and the button head portion of the button member and the cylindrical member The push button structure is arranged on the outer periphery of the button shaft portion positioned between the button insertion tube portion.

  A sixth aspect of the present invention is a timepiece having the push button structure according to any of the first to fifth aspects.

DESCRIPTION OF SYMBOLS 1 Watch case 3 Pushbutton switch 6 Watch module 7 Pushbutton part 8 Switch part 10 Through-hole 11 Cylindrical member 12 Button member 13 Coil spring 14 Axis insertion cylinder part 15 Button insertion cylinder part 18 Insertion hole 20 Button shaft part 20a Waterproof packing 21 Button Head 22 Retaining ring 24, 31 Waterproof ring 25 Annular groove 26, 32 Pressure contact surface 27, 30, 33 Release surface 28, 34 Stepped portion

Claims (6)

A case having a through hole;
A cylindrical member having a shaft insertion cylinder part inserted into the through hole of the case and a button insertion cylinder part located outside the case;
A button member having a button shaft portion slidably inserted into the shaft insertion tube portion of the tubular member and a button head portion slidably inserted into the button insertion tube portion;
An urging member that urges the button member in a pushing direction,
On one of the outer peripheral surface of the button head of the button member and the inner peripheral surface of the button insertion tube portion of the cylindrical member, a waterproof ring is provided in an annular shape,
The waterproof ring is pressed against the other of the outer peripheral surface of the button head of the button member and the inner peripheral surface of the button insertion tube portion of the cylindrical member when the button member moves in the pushing direction. 2. A push button structure comprising: a pressure contact surface; and a release surface on which the waterproof ring is slid by releasing the pressure contact of the waterproof ring when the button member is moved in a pushing direction.   2. The push button structure according to claim 1, wherein the waterproof ring is provided on an outer peripheral surface of the button head of the button member, and the pressure contact surface and the release surface are the button insertion tube portion of the tubular member. A push button structure provided on the inner peripheral surface of the push button.   3. The push button structure according to claim 1, wherein the release surface of the button insertion cylinder part slides in a state in which the waterproof ring is in contact with the push button structure.   4. The push button structure according to claim 1, wherein a stepped portion is inclined at a boundary portion between the press contact surface and the release surface. 5.   5. The pushbutton structure according to claim 1, wherein the urging member is a coil spring, and is between the button head of the button member and the button insertion cylinder of the cylindrical member. The push button structure is arranged on the outer periphery of the button shaft portion located at the top. A timepiece comprising the push button structure according to any one of claims 1 to 5.

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