JP2010230362A - Timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a timepiece that allows a crown to be always in conduction to a case and reduces costs. <P>SOLUTION: A conductive elastic member 7 provided between the crown 5 of a winding core pipe 6 and a shaft section 51 includes one end 71 abutting on the same position of the winding core pipe 6 and the other end 72 abutting on the same position of the crown 5 in pull-out operation and push-in operation of the crown 5, and expands and contracts according to operation positions of the crown 5, thus allowing the crown 5 to be always in conduction to the winding core pipe 6 by the elastic member 7 and hence allowing the crown 5 to be in conduction to the case 2. Thus, even if a user building up static electricity touches the crown 5, the static electricity is released to the side of the case 2 regardless of the operation position of the crown 5, thus preventing malfunction, or the like of an electronic circuit section because of the static electricity. Also, since the screw 5 is in conduction to the case 2 by a simple configuration of merely providing the elastic member 7 between the winding core pipe 6 and the shaft section 51 of the crown 5, costs are reduced. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a timepiece.

  In a watch with an electronic circuit part in the movement, if the user touches the crown with static electricity, the static electricity will flow to the electronic circuit part through the crown and winding stem, causing the electronic circuit part to malfunction. There is a risk that it will be destroyed. As a solution to such a problem, a screw lock structure has been conventionally employed in a timepiece (for example, Patent Document 1).

  In the screw lock structure described in Patent Document 1, the crown is screwed into a support cylinder installed inside the case when not operated. In the screw lock structure, by rotating the crown and removing it from the support tube, the crown moves to the outside of the case and the timepiece can be operated. In the watch described in Patent Document 1 having such a screw lock structure, the crown is screwed into the support tube inside the case when not operated, so that even if a user with static electricity touches the crown, And it can escape to a case via a support pipe | tube, and it can prevent that static electricity flows into the electronic circuit part inside a case.

JP 2000-258560 A

  However, in the timepiece described in Patent Document 1, the crown is detached from the support tube during operation, and is not in conduction with the case. Therefore, when the user touches the crown while being charged with static electricity, the electronic circuit unit Static electricity may flow into the electronic circuit unit and cause problems such as malfunction of the electronic circuit unit. In addition, the timepiece described in Patent Document 1 employs a screw lock structure with a complicated configuration, and thus there is a problem that costs are increased.

  An object of the present invention is to provide a timepiece that can always connect a crown and a case and can reduce costs.

  A timepiece according to the present invention includes a winding stem pipe attached to a case, and a crown having a shaft portion inserted through the winding stem pipe, and the crown is configured to be able to be pulled out outward from the case. An elastic member is provided between the winding stem pipe and the shaft portion and is electrically conductive and expands and contracts in response to the crown pull-out operation and push-back operation, and the crown pull-out operation and During the push-back operation, one end of the elastic member is in contact with the same position of the winding stem pipe, and the other end is in contact with the same position of the crown.

  According to the present invention, the elastic member having conductivity is provided between the winding stem pipe and the shaft portion of the crown. This elastic member has one end in contact with the same position of the winding stem pipe and the other end in contact with the same position of the crown at the time of pulling out and pushing back of the crown, and expands and contracts according to the operation position of the crown. By the member, the crown and the winding stem pipe can be always conducted, and as a result, the crown and the case can be conducted. Therefore, even if a user with static electricity touches the crown, the static electricity can be released to the case regardless of the operation position of the crown, and the static electricity will flow to the electronic circuit part arranged inside the case. This can prevent the malfunction of the electronic circuit portion. In addition, since the crown and the case can be conducted with a simple configuration in which an elastic member is simply provided between the winding stem pipe and the crown shaft, the cost can be reduced.

In the timepiece of the present invention, it is preferable that the one end of the elastic member is fitted to the inner periphery of the winding stem pipe, and the other end is locked to the outer periphery of the shaft portion.
According to the present invention, one end of the elastic member is fitted and fixed to the inner periphery of the winding stem pipe, and the other end is locked and fixed to the outer periphery of the shaft portion of the crown. It can be installed, and the elastic member can be prevented from moving when the crown is pulled out. Therefore, the user may feel uncomfortable if the elastic member moves during the operation of pulling out the crown, but this does not occur and the operational feeling of the crown can be improved.

In the timepiece of the present invention, a concave portion that is recessed outward is provided around the shaft portion of the crown, and the winding stem pipe includes a guide portion that guides the shaft portion, and an outer side of the guide portion. The elastic member is formed in a stepped shape with a large-diameter portion larger in diameter than the guide portion, and the elastic member includes a bottom portion of the large-diameter portion and a bottom of the concave portion provided in the crown. It is preferable to be sandwiched between the parts.
According to the present invention, since the elastic member is sandwiched between the bottom portion of the large diameter portion of the winding stem pipe and the bottom portion of the concave portion of the crown, the elastic member is prevented from moving during the operation of pulling out the crown. And the operability of the crown can be improved.

In the timepiece of the invention, it is preferable that the elastic member is a coil spring inserted through the shaft portion.
According to the present invention, since the coil spring is used as the elastic member, the cost can be further reduced.

In the timepiece of the invention, the elastic member is a coil spring inserted through the shaft portion, and a male screw is formed on the outer side of the shaft portion, and the other end of the coil spring is locked to the male screw. It is preferable that
According to the present invention, the coil spring is used as the elastic member, and the other end of the coil spring is locked to the male screw formed on the outer side of the shaft portion, so that the crown and the winding stem pipe can be connected with a very simple configuration. The coil spring can be stably installed and the cost can be further reduced.

Sectional drawing which shows the timepiece which concerns on 1st Embodiment of this invention. Sectional drawing which shows the winding stem pipe and crown of the said embodiment. The figure which shows a coiled spring when the crown of the said embodiment is pulled out. Sectional drawing which shows the large diameter part of the winding stem pipe which concerns on 2nd Embodiment of this invention. Sectional drawing which shows a coiled spring when the crown of the said embodiment is pulled out.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a timepiece 1 according to the first embodiment of the present invention.
The timepiece 1 is attached to the case 2, a movement 3 for an analog electronic timepiece provided inside the case 2, a crown 5 for operating a train wheel in the movement 3 via a winding stem 4, and the case 2. And a winding stem pipe 6 through which the shaft portion 51 of the crown 5 is inserted.

The case 2 includes a cylinder 21 formed in a ring shape, a cover glass 22 attached to the front surface side of the cylinder 21, and a back cover 23 attached to the back surface side of the cylinder 21.
The movement 3 includes a pointer 31 for displaying time, a stepping motor (not shown) for driving the pointer 31, an electronic circuit unit (not shown) for outputting a pulse signal to the stepping motor, and the like. In addition, the movement 3 includes a generator that operates by rotation of a rotating spindle, and a capacitor that charges electric energy generated by the generator, in addition to a general analog electronic timepiece using a primary battery. The electric circuit unit may be operated with electric energy. The movement 3 includes a mainspring as a driving source, a train wheel that transmits the power of the mainspring to the pointer 31, and a generator driven by the mainspring. The electronic circuit unit is operated by electric energy from the generator to operate the electronic circuit unit. It may be one that regulates the train wheel.

FIG. 2 is a cross-sectional view showing the winding stem pipe 6 and the crown 5.
The winding stem pipe 6 has conductivity and is attached in a state of being inserted into an attachment hole 24 formed in the body 21. The winding stem pipe 6 includes a guide portion 61 that comes into contact with the inner surface of the mounting hole 24, and a large-diameter portion 62 that is formed to have a larger diameter than the guide portion 61 and is exposed to the outside of the case 2. Yes. The inner diameter of the large-diameter portion 62 is slightly larger than the spring diameter (outer diameter) of the coil spring 7 described later. The inner diameter of the large diameter portion 62 is slightly smaller than the inner diameter on the outer side.

  The crown 5 is configured to be able to be pulled out from the case 2 to the outside, and the operation such as time adjustment can be performed by pulling out the crown 5. Around the shaft portion 51 of the crown 5 is a concave portion 52 that is recessed outward, and the large diameter portion 62 of the winding stem pipe 6 is disposed inside the concave portion 52. A ring-shaped resin member 521 for preventing play is attached to the inner surface of the concave portion 52 of the crown 5. In such a crown 5, the shaft portion 51 protruding inward is guided to the guide portion 61 of the winding stem pipe 6. A ring-shaped groove 511 is provided at an intermediate position in the axial direction of the shaft portion 51. A packing 512 is attached to the groove 511. A male screw 513 is formed at the outer end of the shaft 51.

  Between the shaft portion 51 of the crown 5 and the large diameter portion 62 of the winding stem pipe 6, a coil spring 7 as an elastic member inserted through the shaft portion 51 is provided. One end 71 of the coil spring 7 is in a state of being fitted and fixed to the inner circumference on the inner side of the large-diameter portion 62 having a slightly smaller diameter. The other end 72 of the coil spring 7 is locked and fixed to a male screw 513 formed at the outer end of the shaft portion 51. The coil spring 7 has only the end portions 71 and 72 because the inner diameter of the large diameter portion 62 of the winding stem pipe 6 in which the coil spring 7 is accommodated is slightly larger than the spring diameter of the coil spring 7. It is fixed to the winding stem pipe 6 or the shaft portion 51, and the portions other than the end portions 71 and 72 are only slightly in contact with the winding stem pipe 6 and the shaft portion 51.

Therefore, in this embodiment, when a user who is charged with static electricity touches the crown 5 when the crown 5 is located on the case 2 side, the static electricity from the crown 5 is changed from the other end 72 to the one end 71 of the coil spring 7. , It flows into the winding stem pipe 6 and flows from the winding stem pipe 6 to the case 2 side, so that static electricity can be prevented from flowing into the electronic circuit section inside the movement 3, and the electronic circuit due to static electricity can be prevented. The malfunction of the part can be prevented.
The coil spring 7 is installed so as to be slightly compressed when the crown 5 is located on the case 2 side.

FIG. 3 is a view showing the coil spring 7 when the crown 5 is pulled out.
When the crown 5 is pulled out, such a coil spring 7 has an end 71 fixed to the winding stem pipe and the other end 72 follows the drawer of the crown 5 as shown in FIG. As a result, the crown 5 is slightly extended as compared to when the crown 5 is positioned on the case 2 side. However, even when the crown 5 is pulled out, the coil spring 7 has one end 71 at the same position on the inner peripheral surface of the large-diameter portion 62 (inner side on the inner side of the large-diameter portion 62 having a slightly smaller diameter). And the other end 72 is in a state of being in contact with the same position (male thread 513) of the outer peripheral surface of the shaft portion 51. Therefore, even when the crown 5 is pulled out, the coil spring 7 The crown 5 and the winding stem pipe 6 can be electrically connected, so that the crown 5 and the case 2 can be electrically connected. Therefore, in this embodiment, even when a user who is charged with static electricity touches the crown 5 when the crown 5 is pulled out, the static electricity can be released to the case 2 side, and malfunction of the electronic circuit portion is prevented. be able to.

  The coil spring 7 has only end portions 71 and 72 fixed to the winding stem pipe 6 or the shaft portion 51, and the portions other than the end portions 71 and 72 are only slightly in contact with the winding stem pipe 6 and the shaft portion 51. Therefore, the coil spring 7 does not rub against the winding stem pipe 6 or the shaft 51 when the crown 5 is pulled out, and almost no sliding resistance is generated by the coil spring 7 when the crown 5 is pulled out. ing. Therefore, the crown 5 can be pulled out smoothly without feeling any sliding resistance.

  In the present embodiment, the amount of compression of the coil spring 7 when the crown 5 is located on the case 2 side is very small, and the spring force of the coil spring 7 is used when the user pulls out the crown 5. So as not to affect the user's feeling of operation. Further, when the crown 5 is pushed back to the case 2 side, the coil spring 7 is displaced by the other end 72 following the push-back operation of the crown 5 while the one end 71 is fixed to the case 2 side. The original compression state is restored (FIG. 2).

According to the present embodiment as described above, the following effects can be obtained.
(1) When the crown 5 is pulled out and pushed back, the coil spring 7 has one end 71 in contact with the same position of the winding stem pipe 6 and the other end 72 in contact with the same position of the crown 5. Since it expands and contracts according to the operating position, the crown 5 and the winding stem pipe 6 can be always connected by this coil spring 7, and as a result, the crown 5 and the case 2 can be connected. Therefore, even if a user with static electricity touches the crown 5, the static electricity can escape to the case 2 side regardless of the operation position of the crown 5, and the static electricity can be prevented from flowing into the electronic circuit portion. This can prevent malfunction of the electronic circuit section. Further, since the crown 5 and the case 2 can be electrically connected with each other with a simple configuration in which the coil spring 7 is provided between the winding stem pipe 6 and the shaft portion 51 of the crown 5, the cost can be reduced.

(2) Since one end 71 of the coil spring 7 is fitted and fixed to the inner periphery of the winding stem pipe 6 and the other end 72 is fixed to the outer periphery of the shaft portion 51 of the crown 5, the crown 5 is pulled out. The coil spring 7 can be prevented from moving during operation, and the operational feeling of the crown 5 can be improved.
(3) Since the coil spring 7 is used as an elastic member provided between the winding stem pipe 6 and the shaft portion 51 of the crown 5, the cost can be further reduced.

(4) Since the other end 72 of the coil spring 7 is locked to the male screw 513 formed on the outer side of the shaft portion 51 of the crown 5, the coil spring 7 can be stably installed with a very simple configuration. Cost can be further reduced. The coil spring 7 has only end portions 71 and 72 fixed to the winding stem pipe 6 or the shaft portion 51, and the portions other than the end portions 71 and 72 are only slightly in contact with the winding stem pipe 6 and the shaft portion 51. Therefore, the coil spring 7 is not greatly rubbed against the winding stem pipe 6 or the shaft portion 51 when the crown 5 is pulled out, and the crown 5 can be smoothly pulled out without feeling any sliding resistance.

[Second Embodiment]
4 is a cross-sectional view showing the large diameter portion 62A of the winding stem pipe 6 according to the second embodiment, and FIG. 5 is a cross-sectional view showing the coil spring 7 when the crown 5 is pulled out. Hereinafter, the same functional parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.
In the first embodiment, one end 71 of the coil spring 7 is fitted and fixed to the inner periphery of the large diameter portion 62, and the other end 72 is locked and fixed to the male screw 513. As a result, the entire coil spring 7 is prevented from moving when the crown 5 is operated.

  On the other hand, in this embodiment, the inner diameter of the large-diameter portion 62A is the same from the inner side to the outer side, and the coil spring 7 is a compression spring having a weak spring force, and the bottom portion 621 of the large-diameter portion 62A. And the bottom portion 522 of the concave portion 52 of the crown 5. Also in this embodiment, as shown in FIGS. 4 and 5, the coil spring 7 has its end portions 71 and 72 at the same position (large diameter) of the large diameter portion 62 </ b> A according to the operation position of the crown 5. The entire coil spring 7 does not move because it expands and contracts while being in contact with the bottom portion 621) of the portion 62A and the same position of the crown 5 (bottom portion 522 of the concave portion 52).

  Also in this embodiment, the coil spring 7 can always connect the crown 5 and the winding stem pipe 6, and hence the crown 5 and the case 2 can be electrically connected. Even if touched, static electricity can be released to the case 2 side regardless of the operation position of the crown 5, and malfunction of the electronic circuit portion can be prevented. Further, since the intermediate portion of the coil spring 7 is not in contact with the winding stem pipe 6 and the crown 5, sliding resistance due to the coil spring 7 is not generated, and the crown 5 is smoothly pulled out and pushed back. It can be carried out. In addition, the cost can be reduced because the winding stem pipe 6 and the winding stem 4 are not processed to lock the ends 71 and 72 of the coil spring 7.

[Modification of Embodiment]
Note that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope in which the object of the present invention can be achieved are included in the present invention.
In each of the above embodiments, the coil spring 7 is used as the elastic member. However, for example, a cylindrical resin member having conductivity may be used as the elastic member, and the winding stem pipe 6 and the crown 5 can be electrically connected. Any member may be used as the elastic member.

In each of the embodiments described above, the elastic member is formed in a coil shape, but the elastic member is formed in a longitudinal shape along the shaft portion 51 of the crown 5, and the winding stem pipe 6 is formed along the shaft portion 51 of the crown 5. And the crown 5 may be provided.
In the first embodiment, the other end 72 of the coil spring 7 is locked to the male screw 513 formed on the shaft portion 51 of the crown 5, but the other end 72 of the coil spring 7 is bonded to the crown 5 by, for example, bonding. May be locked to the shaft portion 51 of the crown 5 and may be locked to the shaft portion 51 of the crown 5 by any configuration.

  DESCRIPTION OF SYMBOLS 1,1A ... Clock, 2 ... Case, 4 ... Winding stem, 5 ... Crown, 6 ... Winding stem pipe, 7 ... Coil spring (elastic member), 51 ... Shaft part, 52 ... Concave part, 61 ... Guide part, 62 , 62A ... large diameter portion, 71 ... one end, 72 ... other end, 513 ... male screw, 522 ... bottom portion of the concave portion, 621 ... bottom portion of the large diameter portion.

Claims (5)

A watch having a winding stem pipe attached to a case, and a crown having a shaft inserted through the winding stem pipe, the crown being configured to be able to be drawn outward from the case,
Between the winding stem pipe and the shaft portion, there is provided an elastic member that has electrical conductivity and expands and contracts according to the operation of pulling out and pushing back the crown,
At the time of the operation of pulling out and pushing back the crown, one end of the elastic member is in contact with the same position of the winding stem pipe and the other end is in contact with the same position of the crown. The timepiece according to claim 1,
The timepiece characterized in that the one end of the elastic member is fitted to the inner periphery of the winding stem pipe, and the other end is locked to the outer periphery of the shaft portion. The timepiece according to claim 1,
Around the shaft portion of the crown is provided with a concave portion recessed outward.
The winding stem pipe is formed in a stepped shape including a guide portion that guides the shaft portion, and a large diameter portion that is provided on the outer side of the guide portion and is larger in diameter than the guide portion,
The timepiece characterized in that the elastic member is sandwiched between a bottom portion of the large diameter portion and a bottom portion of the concave portion provided on the crown. The timepiece according to any one of claims 1 to 3,
The timepiece, wherein the elastic member is a coil spring inserted through the shaft portion. The timepiece according to claim 2,
The elastic member is a coil spring inserted through the shaft portion,
A male screw is formed on the outer side of the shaft portion,
The timepiece, wherein the other end of the coil spring is engaged with the male screw.

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