JP2015117982A - Timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a timepiece capable of eliminating the deviation of a clearance by certainly positioning a parting ring on a watch case, and improving appearance.SOLUTION: A watch case 20 has a first groove portion 25 along an inner peripheral surface 24. A parting ring 30 disposed inside the watch case 20 has a second groove portion 36 on an outer peripheral surface 31. Between the first groove portion 25 and the second groove portion 36, an O-ring having elasticity is provide. Namely, the O-ring 27 covers a clearance CL between the first groove portion 25 and the second groove portion 36, so that the clearance CL is made to be inconspicuous. The O-ring 27 regulates the movement of the parting ring 30 accompanied with the clearance CL. Therefore, by preventing the deviation of the clearance CL, the clearance CL is prevented from being conspicuous.

Description

  The present invention relates to a timepiece to which a timepiece glass is attached via a parting ring provided on an inner peripheral surface of a timepiece case.

Conventionally, there is known a timepiece having a parting ring interposed for attaching a timepiece glass to a timepiece case (see, for example, Patent Document 1).
As shown in FIG. 6, a timepiece (pointer type wristwatch) 100 described in Patent Document 1 includes a timepiece case 101. A watch glass 104 is mounted on the upper part of the watch case 101 via a packing 105 in a state where a parting ring (parting member) 103 is arranged on a collar part 102 formed on the inner surface. The parting ring 103 is fixed by being pressed against the flange 102 by the watch glass 104.
A watch module 106 is housed in the watch case 101, and a dial plate 109 is provided on the top surface of the watch module 106. Further, a back cover 107 is attached to the watch case 101 via a packing 108 on the lower surface of the watch case 101.

JP 2000-88972 A (FIG. 2)

By the way, in the timepiece described in Patent Document 1 described above, the parting ring and the timepiece case are provided with a clearance in the fitting diameter in consideration of assemblability.
However, with a normal setting, the outer diameter has a one-side clearance of about 0.05 mm, and it is difficult to incorporate it with a uniform clearance around the entire circumference, resulting in a difference between the clearance widths on the left and right sides, which is not very beautiful in appearance.
In particular, when the distance between the back surface of the watch glass and the upper surface of the parting ring is wide, the tendency is remarkable. Therefore, conventionally, the outer peripheral cut on the upper surface of the glass is overlapped to make it difficult to see, or is printed on the glass so that the clearance portion is not visible. However, this is not preferable because the display surface of the watch feels narrow.

  The present invention has been made to solve the conventional problems, and it is an object of the present invention to provide a timepiece capable of eliminating the unevenness of clearance and improving the appearance by reliably positioning the parting ring on the timepiece case. To do.

One aspect according to the present invention is as follows:
A watch case having a first groove formed along the inner peripheral surface;
A parting member having a second groove portion disposed along the outer peripheral surface with a clearance inside the watch case;
An elastic member having elasticity provided between the first groove portion formed on the inner peripheral surface and the second groove portion formed on the outer peripheral surface;
There is provided a timepiece in which the elastic member regulates movement of the parting member due to a clearance between the outer peripheral surface and the inner peripheral surface.

  In the present invention, the O-ring provided between the first groove portion on the inner peripheral surface of the watch case and the second groove portion on the outer peripheral surface of the parting ring provides clearance between the first groove portion and the second groove portion. Since it covers, the clearance can be made inconspicuous. Further, since the O-ring regulates the movement of the parting ring associated with the clearance, it is possible to provide a timepiece having an effect of improving the aesthetics by preventing the clearance from conspicuous by preventing the clearance from being biased. .

Front view of a timepiece according to an embodiment of the present invention (A) is a principal part top view of the timepiece of embodiment which concerns on this invention, (B) is sectional drawing of a BB position in (A). Enlarged view of part “III” in FIG. Exploded view showing the relationship between the watch case, parting ring and O-ring Explanatory drawing of force acting with deformation of O-ring Cross section of the main part of a conventional watch

Hereinafter, a timepiece according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the timepiece 10 according to the embodiment of the present invention can be applied to a pointer-type wristwatch.
As shown in FIGS. 1 and 2, the timepiece 10 has a timepiece case 20. The watch case 20 has a substantially ring shape as a whole, and has a hollow portion 21 inside. The timepiece module 40 is accommodated in the hollow portion 21, and a back cover 45 is attached to the timepiece case 20 on the back side of the timepiece module 40 (the lower side in FIG. 2B).

On the surface side of the timepiece module 40 (upper side in FIG. 2B), a timepiece glass 43 is attached to the inner side of the front surface side end portion of the timepiece case 20 via a packing 44.
In this example, a minute gap is provided between the parting ring 30 (parting member) and the watch glass 43 (see FIG. 3), but the parting ring 30 and the watch glass 43 seem to be in contact with each other. In some cases.
Further, a fixing portion 22 for attaching the band 11 is provided opposite to an upper end portion (upper end portion in FIG. 1) and a lower end portion of the watch case 20.
In the following description, the timepiece glass 43 side will be described as “front side” and the back cover 45 side will be described as “back side”.

A space 46 for accommodating the parting ring 30 is provided between the surface side surface of the timepiece module 40 accommodated in the hollow portion 21 of the timepiece case 20 and the timepiece glass 43.
The timepiece module 40 includes an electronic circuit and an analog movement necessary for a timepiece function, and a dial 41 and hands 42 such as an hour hand, a minute hand, and a second hand are provided on a surface side of the timepiece module 40.
In the space 46, the dial 41 is accommodated, and the pointer 42 is accommodated so as to be able to move the hand.

As shown in FIG. 3, a glass attachment surface 23 for fitting the watch glass 43 is provided at the front side end portion of the inner surface of the watch case 20. The glass attachment surface 23 is provided in a cylindrical shape along the inner periphery of the watch case 20.
A parting ring mounting surface (inner peripheral surface) 24 having an inner diameter smaller than that of the glass mounting surface 23 is provided on the back surface side of the glass mounting surface 23 of the watch case 20. The parting ring mounting surface 24 is provided in a cylindrical shape along the inner periphery of the watch case 20.

As shown in FIGS. 3 and 4, a first groove portion 25 is provided on the entire periphery along the inner periphery of the timepiece case 20 at the lower portion (back end portion) of the parting ring mounting surface 24.
A first inclined surface 251 is provided in the first groove portion 25.
More specifically, the front-side end of the first inclined surface 251 is located closer to the inner peripheral surface of the watch case 20, and the rear-side end is located closer to the outer peripheral surface of the watch case 20, It becomes the 1st inclined surface 251 which faced the direction.
Further, the upper horizontal surface 252 extending in the horizontal direction (the direction orthogonal to the vertical direction) from the surface side end portion of the first inclined surface 251 toward the hollow portion 21 and the rear surface side end portion of the first inclined surface 251 is hollow. A sewage horizontal surface (back side wall surface) 253 extending horizontally toward the portion 21 is provided.

There is a surface extending further toward the center side of the watch case 20 than the parting ring mounting surface 24 of the sewage horizontal surface 253, and this extended surface serves as a receiving surface for receiving the parting ring 30.
As shown in FIG. 4, the receiving surface of the parting ring 30 is configured by a surface on the surface side of the receiving part 26 formed so as to protrude toward the center side of the watch case 20 from the parting ring mounting surface 24. Has been.
In this example, the surface side of the receiving portion 26 is flush with the sewage flat surface 253, but is provided on the back surface side of the sewage flat surface 253 at a position almost directly below the parting ring mounting surface 24. The surface on the front surface side of the receiving portion 26 may be formed so as to be lowered by one step on the back surface side from the sewage horizontal surface 253.
The receiving portion 26 has a cutout portion 261 cut out from the inside to the outside at the inner end portion. The notch 261 is a straight line that is substantially perpendicular to the straight line connecting the substantially central positions of the pair of fixing parts 22 of the watch case 20 at the substantially center position of the watch case 20, that is, 3 o'clock and 9 o'clock in the dial 41. A pair is provided at a position connecting the two. Although FIG. 2A shows only the 3 o'clock position, the notch 261 is similarly provided at the 9 o'clock position.

As shown in FIGS. 3 and 4, a parting ring 30 having a circular ring shape is attached facing the inside of the parting ring attaching surface 24 (see FIG. 4) of the watch case 20.
The parting ring 30 has an outer peripheral surface 31, an upper surface 32, a slope 33, an inner peripheral surface 34, and a bottom surface 35, and has a substantially trapezoidal cross section as a whole.
In this example, there is a minute gap between the upper surface 32 of the parting ring 30 and the watch glass 43, but the bottom surface 35 of the parting ring 30 so that the upper surface 32 is in contact with the watch glass 43. May be further restricted from separating from the receiving portion 26 of the watch case 20.

The outer peripheral surface 31 faces the parting ring mounting surface 24 of the watch case 20. The outer diameter of the outer peripheral surface 31 is set smaller than the inner diameter of the parting ring mounting surface 24, and a clearance CL (see FIG. 3) is provided between the outer peripheral surface 31 and the parting ring mounting surface 24. . The clearance CL is about 0.05 mm in a state where the parting ring 30 is evenly attached inside the watch case 20.
Therefore, due to the clearance CL, the parting ring 30 is easily inserted into the watch case 20 and is held movably.

A second groove portion 36 is provided over the entire circumference at the back surface side end portion (the lower end portion in FIG. 4) of the outer peripheral surface 31. A second inclined surface 361 is provided in the second groove portion 36.
More specifically, the front side end of the second inclined surface 361 is located on the center side of the watch case 20, and the back side end is located on the outer peripheral surface 31, and faces outward in the front side direction. A second inclined surface 361 is formed.
The second inclined surface 361 is provided substantially in parallel with the first inclined surface 251 provided in the first groove portion 25 of the watch case 20. The second groove 36 has an upper horizontal surface 362 extending in the horizontal direction (direction perpendicular to the vertical direction) from the surface-side end of the second inclined surface 361 toward the outer peripheral surface 31.

A cylindrical convex portion 37 is provided on the bottom surface 35 so as to protrude to the back surface side. A pair of convex portions 37 are provided at symmetrical positions with respect to the center of the parting ring 30. The outer diameter D1 of the convex portion 37 is substantially equal to the width D2 (see FIG. 2A) of the notch portion 261 provided in the receiving portion 26 of the watch case 20. In addition, the height H1 of the convex portion 37 is set to be approximately equal to or slightly smaller than the height H2 of the notch portion 261.
Therefore, when the convex portion 37 is fitted into the notch portion 261, the convex portion 37 restricts the movement of the notch portion 261 in the direction perpendicular to the 3 o'clock to 9 o'clock direction. The movement in the direction of arrow A2 in FIG.

On the other hand, when the convex part 37 of the parting ring 30 is fitted, the notch part 261 is notched to the outer side (right side in FIG. 2A) than the position where the convex part 37 is located. For this reason, the convex part 37 is movable along the notch part 261 inside the notch part 261.
That is, when an impact is applied in the 3 o'clock to 9 o'clock direction with the convex portion 37 fitted to the notch 261, the parting ring 30 is located between the parting ring 30 and the parting ring mounting surface 24. Within the range of the clearance CL, the movement in the 3 o'clock to 9 o'clock direction (the direction of the arrow A1 in FIG. 2A) is held in a possible manner.
In addition, the effect related to the movement is described later.

An O-ring 27 (elastic member) is provided between the first groove portion 25 of the parting ring mounting surface 24 of the watch case 20 and the second groove part 36 of the outer peripheral surface 31 of the parting ring 30.
The distance between the first inclined surface 251 of the first groove portion 25 and the second inclined surface 361 of the second groove portion 36 in the state where the parting ring 30 is attached to the watch case 20 is outside the O-ring 27. Smaller than the diameter.
Therefore, in a state where the parting ring 30 is attached, the O-ring 27 is crushed between the first inclined surface 251 and the second inclined surface 361 (see FIGS. 3 and 5).

Next, the force accompanying the deformation of the O-ring 27 will be described.
As shown in FIG. 5, the first inclined surface 251 of the first groove portion 25 and the second inclined surface 361 of the second groove portion 36 are all caused by the elastic force generated when the O-ring 27 is crushed. It is urged | biased in the direction away from each other in the circumference.
Here, since the first inclined surface 251 is provided on the watch case 20 and does not move, the O-ring 27 is urged toward the center rear surface side of the watch case 20 by the reaction force F1 from the first inclined surface 251. Is done.

In the parting ring 30, the second inclined surface 361 of the second groove 36 receives a force F <b> 2 corresponding to the reaction force F <b> 1 from the O-ring 27. The force F <b> 2 includes a force F <b> 3 in the rear surface direction and a force F <b> 4 directed toward the center side of the watch case 20.
Therefore, the parting ring 30 tends to move toward the center over the entire circumference by the force F4.
Further, the parting ring 30 is pressed against the receiving part 26 of the watch case 20 by the force F <b> 3 and is fixed to the receiving part 26.
In addition, the upper surface 32 of the parting ring 30 and the watch glass 43 may be arranged so as to contact each other, and the parting ring 30 may be further restricted from moving away from the receiving portion 26.

The effect of the timepiece 10 of the present invention will be described.
In the timepiece 10 according to the embodiment of the present invention, the timepiece case 20 has a first groove portion 25 along the parting ring mounting surface 24. The parting ring 30 disposed inside the watch case 20 has a second groove portion 36 on the outer peripheral surface 31. An elastic O-ring 27 is provided between the first groove portion 25 and the second groove portion 36 (see FIG. 4).

That is, the O-ring 27 is located between the first groove portion 25 and the second groove portion 36 and makes it difficult to recognize the clearance CL, so that the clearance CL can be made inconspicuous (see FIG. 3). .
The O-ring 27 restricts the movement of the parting ring 30 that is allowed by the clearance CL between the outer peripheral surface 31 of the parting ring 30 and the parting ring mounting surface 24 of the watch case 20 (see FIG. 2A). .

More specifically, the O-ring 27 positions the parting ring 30 approximately at the center of the watch case 20 (see force F4 in FIG. 5).
For this reason, the clearance CL between the outer peripheral surface 31 of the parting ring 30 and the parting ring mounting surface 24 of the watch case 20 becomes uniform, and the clearance CL can be prevented from being noticeable.

Further, when the time viewing side is the front side and the opposite side is the back side, the watch case 20 is equal to the lower horizontal surface 253 of the first groove 25 formed on the parting ring mounting surface 24 or the back side. In the side position, it has the receiving part 26 which receives the parting ring 30 (refer FIG. 3).
Since the receiving part 26 is formed to travel inward along the parting ring mounting surface 24 of the watch case 20, the parting ring 30 is supported from the back side by the receiving part 26 of the watch case 20.

Further, the first groove portion 25 formed on the parting ring mounting surface 24 of the watch case 20 has a first inclined surface 251 that presses the O-ring 27 toward the center rear surface. Further, the second groove portion 36 formed on the outer peripheral surface 31 of the parting ring 30 is the first facing toward the outer side in the front surface direction that receives the O-ring 27 pressed by the first inclined surface 251 facing toward the center rear surface side. 2 inclined surfaces 361 (see FIG. 4).
The parting ring 30 is pressed against the receiving portion 26 of the watch case 20 by the elastic force of the O-ring 27 (see force F3 in FIG. 5).
Therefore, when the watch falls or an impact occurs, the parting ring 30 can move toward the watch glass 43 within the gap between the upper surface 32 of the parting ring 30 and the watch glass 43. The moving force (impact) is absorbed by the elasticity of the O-ring 27 and is prevented from colliding with the watch glass 43 in advance.
Even if the parting ring 30 collides with the watch glass 43, the impact force is greatly reduced by the elasticity of the O-ring 27, so that the watch glass 43 can be prevented from being scratched.
When the impact is settled, the parting ring 30 is returned to the original state pressed by the receiving portion 26 of the watch case 20 by the elastic force of the O-ring.

Moreover, the receiving part 26 has the notch part 261 notched toward inner side from the inner side. The parting ring 30 has a convex part 37 having an outer diameter substantially equal to the width of the notch part 261 fitted into the notch part 261. When the convex portion 37 is fitted, the notched portion 261 is notched to the position in the outer side direction of the timepiece case 20 from the position where the normal convex portion 37 is located.
Thus, the parting ring 30 can move in the notch direction within the range of the clearance CL between the parting ring mounting surface 24 of the watch case 20 and the outer peripheral surface 31 of the parting ring 30. The positional relationship is easily and reliably determined.
When the watch falls or an impact occurs, the parting ring 30 is notched within the clearance CL between the parting ring mounting surface 24 of the watch case 20 and the outer peripheral surface 31 of the parting ring 30. Although the moving force (impact) is absorbed by the elasticity of the O-ring 27, the parting ring 30 is moved to a position almost the same as the position before receiving the impact by the restoring force of the O-ring 27. Can be restored.

In particular, in this example, the watch case 20 is a wristwatch having a pair of fixing portions 22 that fix the band 11 to be attached to the arm at opposite positions on the outer periphery of the watch case 20.
In the watch case 20, when the watch case 20 is viewed from the front surface side, a straight line (ie, 3 o'clock) that is substantially orthogonal to the straight line connecting the substantially center positions of the fixing portion 22 at the substantially center position of the watch case 20 Assuming (−9 o'clock)), the case where a pair of opposed notches 261 are arranged in the receiving portion 26 located on the assumed straight line is illustrated.

That is, the cutout portion 261 is provided at the 3 o'clock to 9 o'clock position in the receiving portion 26, and the parting ring 30 is provided with a pair of convex portions 37 at positions corresponding to the pair of cutout portions 261.
Therefore, in the case where an impact is generated due to the timepiece dropping or the like, the effect of absorbing the impact force by the elasticity of the O-ring while allowing the parting ring 30 to move in the notch direction (hereinafter referred to as the “ring-off ring 30”). In the case of this example, the impact absorbing effect) is particularly exerted against an impact in the 3 o'clock to 9 o'clock direction.
Generally, in a wristwatch (timepiece 10), when an impact is applied in a direction (3 o'clock to 9 o'clock) where the band 11 is not provided, the impact force is increased.
In the case of this example, the shock absorbing effect is exerted in the direction in which the impact force tends to increase (3 o'clock to 9 o'clock direction), so it is suitable for damage such as when the watch is dropped. Can be suppressed.

The timepiece of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
The first groove portion 25 of the watch case 20 and the second groove portion 36 of the parting ring 30 do not have to have the shape as described above. For example, as a first modification, the first groove 25 of the watch case 20 has a vertical surface instead of the first inclined surface 251, and the second groove 36 of the parting ring 30 is the second inclined surface 361. Alternatively, a vertical surface may be provided, and an O-ring 27 may be provided between the first groove portion 25 and the second groove portion 36. In addition, as a second modification, the first groove portion 25 of the watch case 20 has two inclined surfaces (in the shape of a cross) instead of the upper horizontal surface 252 and the first inclined surface 251, and the first part of the parting ring 30 The second groove portion 36 has two inclined surfaces (in a U shape) instead of the upper horizontal surface 362 and the second inclined surface 361, and there is an O between the first groove portion 25 and the second groove portion 36. A ring 27 may be provided. Also in Modification 1 and Modification 2, the clearance CL between the outer peripheral surface 31 of the parting ring 30 and the parting ring mounting surface 24 of the watch case 20 becomes uniform, and the clearance CL is conspicuous as in the above embodiment. Can be prevented. Further, when an impact occurs due to the timepiece falling or dropping, the parting ring 30 is notched within the clearance CL between the parting ring mounting surface 24 of the watch case 20 and the outer peripheral surface 31 of the parting ring 30. Although the moving force (impact) is absorbed by the elasticity of the O-ring 27, the parting ring 30 is moved to a position almost the same as the position before receiving the impact by the restoring force of the O-ring 27. Can be restored.
In the above description, an analog type wristwatch having a dial is described as an example, and thus the positions of the convex portion 37 and the cutout portion 261 have been described as the 3 o'clock and 9 o'clock positions. It is desirable to provide in.
In that case, the position at 3 o'clock and 9 o'clock is assumed to be a straight line that is substantially orthogonal to the straight line connecting the substantially central positions of the fixing portion that fixes the belt attached to the arm at the substantially central position of the watch case. A pair of notches are provided in the receiving part located on the assumed straight line, and the corresponding convex part is provided on the parting ring.
Further, the present invention is not limited to a wristwatch, and the present invention can be preferably applied to a clock such as a table clock as long as it uses a parting ring.
As mentioned above, although several embodiment of this invention was described, this invention is not restricted to these, The invention described in the claim and its equal range are included.

The invention described in the claims of the present application will be appended below.
(Appendix)
According to the first aspect of the present invention, there is provided a watch case having a first groove formed along the inner peripheral surface, and a watch case arranged along the outer peripheral surface with a clearance inside the watch case. A parting member having two groove portions, and an elastic member having elasticity provided between the first groove portion formed on the inner peripheral surface and the second groove portion formed on the outer peripheral surface, In the timepiece, the elastic member regulates the movement of the parting member accompanying the clearance between the outer peripheral surface and the inner peripheral surface.
The invention according to claim 2 is the timepiece according to claim 1, wherein the elastic member has the parting member positioned substantially at the center of the watch case.
According to a third aspect of the present invention, in the timepiece according to the first or second aspect, when the time viewing side is the front side and the opposite side is the back side, the timepiece case has the inner circumference. A receiving portion that receives the parting member at a position that is equal to or closer to the back side wall surface of the first groove formed on the surface, and the receiving portion travels inward along the inner peripheral surface. The timepiece is formed as described above.
According to a fourth aspect of the present invention, in the timepiece according to the third aspect, the first groove portion formed on the inner peripheral surface is directed to the central back surface direction pressing the elastic member in the central back surface direction. The second groove portion formed on the outer peripheral surface receives the elastic member pressed by the first inclined surface facing the back surface side, and faces the outer side in the front surface direction. And the parting member is pressed against the receiving part by the pressing of the elastic member, and movement in a direction away from the receiving part is restricted by an impact. It is a clock.
According to a fifth aspect of the present invention, in the timepiece according to the third or fourth aspect, the receiving portion has a cutout portion cut out from the inside to the outside, and the parting member is the cutout portion. A convex portion having an outer diameter substantially equal to the width of the cutout portion fitted into the cutout portion, and the cutout portion is cut out to the outside of the position where the convex portion is located when fitted. When the impact is received, the parting member moves in a direction along the notch in the clearance range, and the elastic member absorbs the impact acting on the parting member. The timepiece is characterized in that the parting member is positioned at substantially the same position as the position before receiving.
According to a sixth aspect of the present invention, in the timepiece according to the fifth aspect, the timepiece case has a fixing portion for fixing a belt to be attached to an arm at a position facing the outer periphery of the timepiece case. The assumption is made when the case assumes a straight line that is substantially orthogonal at a substantially central position of the watch case with respect to a straight line connecting the substantially central positions of the fixing portion when the watch case is viewed from the front side. A timepiece having a pair of opposed cutout portions provided on a receiving portion positioned on a straight line, and the parting ring having a pair of convex portions corresponding to the pair of cutout portions. It is.

10 watch 11 band 20 watch case 22 fixing part 24 parting ring mounting surface (inner peripheral surface)
25 1st groove part 251 1st inclined surface 253 Sewer horizontal plane (back side wall surface)
26 receiving portion 261 notch portion 27 O-ring 30 parting ring 31 outer peripheral surface 36 second groove portion 361 second inclined surface 37 convex portion CL clearance

Claims (6)

A watch case having a first groove formed along the inner peripheral surface;
A parting member having a second groove portion disposed along the outer peripheral surface with a clearance inside the watch case;
An elastic member having elasticity provided between the first groove portion formed on the inner peripheral surface and the second groove portion formed on the outer peripheral surface;
The timepiece characterized in that the elastic member regulates the movement of the parting member accompanying the clearance between the outer peripheral surface and the inner peripheral surface. The timepiece according to claim 1,
The timepiece characterized in that the elastic member positions the parting member substantially at the center of the timepiece case. The timepiece according to claim 1 or 2,
When the time viewing side is the front side and the opposite side is the back side,
The watch case has a receiving portion that receives the parting member at a position that is equal to or closer to the back surface side wall surface of the first groove portion formed on the inner peripheral surface,
The timepiece characterized in that the receiving part is formed so as to travel inward along the inner peripheral surface. The timepiece according to claim 3,
The first groove formed on the inner peripheral surface has a first inclined surface facing the central back surface direction that presses the elastic member in the central back surface direction,
The second groove formed on the outer peripheral surface has a second inclined surface facing outward in the front surface direction to receive the elastic member pressed by the first inclined surface facing toward the back surface. ,
A timepiece in which the parting member is pressed against the receiving portion by the pressing of the elastic member, and movement in a direction away from the receiving portion is restricted by an impact. The timepiece according to claim 3 or 4,
The receiving part has a notch cut out from the inside to the outside;
The parting member has a convex part having an outer diameter substantially equal to the width of the notch part fitted into the notch part,
When the cut-out portion is cut out to the outside of the position where the convex portion is located when the fitting is performed, the parting member extends along the cut-out portion within the clearance in the event of an impact. The elastic member absorbs an impact acting on the parting member, and then the parting member is positioned at substantially the same position as before the elastic member receives the impact. . The timepiece according to claim 5,
The watch case has a fixing portion for fixing a belt to be attached to an arm at a position opposite to an outer periphery of the watch case;
When the watch case assumes a straight line that is substantially orthogonal at a substantially central position of the watch case with respect to a straight line that connects the substantially central positions of the fixing portion when the watch case is viewed from the front side, A pair of opposed notches provided in the receiving portion located on the assumed straight line,
The timepiece ring has a pair of convex portions corresponding to the pair of notches.

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