JPH0352918B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a crown for a portable watch.

[Conventional technology]

Generally, a portable watch with a crown protrudes from the outer periphery of the watch case, and the time, date, day of the week, etc. can be adjusted by pinching the crown with one's fingers, pulling it out, and rotating it.
However, in mobile watches with waterproof function,
If the crown protrudes from the outer periphery of the watch case, if the crown receives an external shock such as when an object hits the crown while carrying the watch underwater, the watch is placed so that the slight movement of the crown will cause a waterproof seal on the crown. There is a problem in that the uniform compression of the packing is disrupted, and water tends to seep through the weakly compressed areas. For this reason, particularly in high-pressure waterproof portable watches, the crown is provided with a screw lock mechanism to prevent the crown from moving when not in use.

FIG. 3 is a sectional view of a crown portion having a screw locking mechanism disclosed in Japanese Utility Model Application Publication No. 55-150389. A side pipe 2 is fixed to a through hole of the body 1 and has a threaded part 2a on the outer periphery of the body's outer protrusion, and a winding stem mounting part 3c is inserted into this side pipe 2 and has a winding stem fixed to its inner end. A reuse main body 3 having a shaft portion 3a and an irregularly shaped portion 3b continuous with the outer circumferential side of the shaft portion 3a and having at least a portion larger in diameter than the outer diameter of the threaded portion 2a of the side pipe 2;
An irregularly shaped part 4a that fits into the irregularly shaped part 3b and is slidable in the axial direction; a threaded part 4b that screws into the threaded part 2a of the side pipe 2; and a threaded part 4b that engages with the inner surface 3d of the irregularly shaped part 3b of the main body 3. It has a structure consisting of a reuse ring 4 provided with a removable engaging portion 4c. That is, the reuse main body 3 is provided with a deformed portion 3b, and the reuse ring 4 is provided with a deformed portion 4a.
By screwing into the main body 3, the main body 3 is screw-locked to prevent the main body 3 from being pulled out or rotated. When performing the reuse operation, the reuse ring 4 is unscrewed, the reuse ring 4 is slid until the engaging portion 4c and the inner surface 3a are engaged, and then the reuse main body 3 and the reuse ring 4 are operated simultaneously. ing.

[Problem that the invention seeks to solve]

According to the prior art, a watch without a screw lock mechanism has a problem with waterproofness, and in the conventional structure shown in FIG. 3, the crown ring 4 is screw locked to the side pipe 2 and does not move when not in use. Since the main unit 3 of the main unit 3 is held by the main unit 3 by the main unit 4, there is no need to worry about its waterproof function.However, when removing the screw lock, the threaded part 4b of the main unit 4 of the main unit 4 is moved outward from the threaded part 2a of the side pipe 2 in the axial direction. Since space is required, it is necessary to ensure the length from the engaging part 4c of the reuse ring 4 to the inner surface 3d of the reuse main body 3 in the locked state, and also to secure the length between the threaded part 4b of the reuse ring 4 and the thread of the side pipe 2. It is necessary to ensure a length on the axis in which the portion 2a is screwed. As mentioned above, by securing the length between the engaging portion 4c and the inner surface 3d, and securing the length on the axis for screwing, the amount of protrusion of the watch body 3 from the outer circumference of the watch case can be reduced. It is large and has a large amount of protrusion, and the main body 3 and side pipe 2
Because the crown ring 4 is disposed so as to surround the outer periphery of the crown, there is a design problem in that the crown part becomes large and too conspicuous in terms of appearance.

On the other hand, if a counterbore is provided in the watch case and a part of the reuse ring 4 is sunk into the counterbore,
Although the amount of protrusion of the crown body 3 from the outer periphery of the watch case can be reduced, there is a problem in that it becomes difficult to rotate the crown ring 4 by pinching it with fingers when releasing the screw lock.

The present invention solves the above problems, improves the design without reducing waterproof function and operability,
Moreover, it is an object of the present invention to provide a structure of a wristwatch crown part that is advantageous in terms of cost.

[Means for solving problems]

The structure of the present invention includes a body provided with a downwardly-opening counterbore formed on a side surface and a hole penetrating inward from the counterbore, and a body fixed to the hole of the shell and protruding into the counterbore. A side pipe provided with a protrusion, a winding stem mounting screw part and a groove part on the shaft part inserted into the side pipe, and an irregularly shaped part formed on the outside and having at least a portion larger in diameter than the outer periphery of the protrusion part of the side pipe. a small-diameter inner circumferential part formed on the inside that fits into the pipe so as to be able to slide in the axial direction and has a groove on the inner circumference; A deformed portion having an inner diameter larger than the small inner peripheral portion and slidably fitting in the deformed portion of the watch body in the axial direction; a reuse ring provided with an engaging portion that can engage with a wall; a ring member that is clamped between a groove of the reuse ring and an outer circumferential surface of the side pipe;
It is characterized in that it is comprised of a packing that is pressed between the groove of the main body and the inner circumferential surface of the side pipe, and that the main body and the main part can be inserted into the counterbore of the barrel.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 1a and 1b are a sectional view and a side view of the crown part of a timepiece showing an embodiment of the present invention. A counterbore 5a that opens downward is formed on the side surface of the case 5, and the counterbore 5a extends toward the inside of the watch.
A hole 5b passing through is provided.

The outer circumference of the side pipe 6 is formed in two stages and has a stepped portion, and the inner small-diameter outer circumferential portion 6a is inserted into the hole 5b and is positioned and fixed by the stepped portion. A continuous large-diameter outer peripheral portion 6b on the outside protrudes from the hole 5b into the counterbore portion 5a, and the shaft portion 7b of the main body 7 is inserted into the inner periphery of the side pipe 6.

A winding stem attachment screw part 7c to which a winding stem (not shown) is fixed is formed at the inner end of the shaft part 7b of the main body 7, and a groove part 7a is formed on the outer periphery of this shaft part 7b. It has a deformed part 7d continuous to the shaft part continuous to the outside side of the side pipe 6, at least a part of which has a larger diameter than the large diameter outer peripheral part 6b of the side pipe 6, and an inner wall 7e of the deformed part 7d. A groove portion 7f is formed. The packing 8 attached to the groove 7a is clamped between the groove 7a and the inner periphery of the side pipe 6 to form a waterproof structure, and the large-diameter outer periphery 6b of the side pipe 6 and the irregularly shaped portion of the main body 7 A reuse ring 9 is fitted across both of the parts 7d.

The reuse ring 9 has a circular cross-section formed on the inside, and has a small-diameter inner circumferential part 9b with a groove 9a formed on the inner side, and a small-diameter inner circumferential part 9b that is continuous to the outside of the small-diameter inner circumferential part 9b. The irregularly shaped part 9c has a large inner diameter and fits irregularly into the irregularly shaped part 7d of the watch body 7, and the irregularly shaped part 9c is formed at the boundary between the small diameter inner peripheral part 9b and the irregularly shaped part 9c and faces the inner wall 7e of the irregularly shaped part 7d of the watch body 7. , has an engaging portion 9d that can be engaged with the inner wall 7e, and a stepped portion 9e is formed on the outer periphery of the inner side. A ring member 10 made of rubber or synthetic resin attached to the groove 9a connects the groove 9a and the large diameter outer peripheral portion 6 of the side pipe 6.
Due to the appropriate frictional force at this time, the reuse ring 9 engages with the outer periphery of the side pipe 6 via the ring member 10, and is guided by the side pipe 6 and can slide in the axial direction. It's becoming like that. In the state where the reuse main body 7 and the reuse ring 9 are pushed in, the outer end surfaces of the reuse main body 7 and the reuse ring 9 are set to be approximately flush with the outer circumferential surface of the barrel 5, and the outer end surfaces of the side pipe 6 is loosely fitted into the groove 7f of the inner wall 7e of the main body 7.

Next, to explain the operating method, Fig. 2 is a cross-sectional view for explaining the operating state of the reuse section. When correcting the time, date, day of the week, etc. is hooked onto the stepped portion 9e of the reuse ring 9, and the reuse ring 9 is pulled to bring the engaging portion 9d of the reuse ring 9 into contact with the inner wall 7e of the reuse main body 7, as shown in the top diagram. From this state, when the reset ring 9 is pulled out by α and then pulled out one step as shown in the central figure, since the engaging portion 9d and the inner wall 7e are engaged, the reset main body 7 is also pulled out of the barrel 5 by α. .

By rotating the reset ring 9 in this state, the reset body 7 also rotates as the irregularly shaped portions 7d and 9c fit together, thereby making it possible to correct, for example, the date, day of the week, etc. Further, if the reuse ring 9 is pulled out by β and pulled out to the second position, the state shown in the figure below is obtained, and for example, the time can be adjusted in the same way.

When storing the reset main body 7 and the reset ring 9 in the counterbore 5a of the barrel 5, the outer diameter of the reset ring 9 is small enough to fit within a finger width, so press the outer end surface of the reset ring 9 with your finger. The outer end surface of the reuse ring 9 moves to the position of the outer end surface of the reuse main body 7, and if the button is continued to be pressed, the reuse main body 7 is also pressed together, and the reuse main body 7 is inserted into the counterbore 5a of the barrel 5 together with the reuse ring 9. It can be pushed to the desired position.

As a result of the above, the crown part is housed inside the counterbore of the body of the watch case, so there is no need for the crown part to be exposed to external shocks that would impede its waterproof function. Since it can be made invisible, there are no design problems.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the watch body can be housed so as to sink into the body of the watch case, making it difficult for objects to hit the watch body, so that the waterproof function of the watch case can be improved. Fully reliable. Furthermore, since the crown does not protrude from the outer periphery of the watch case, it is possible to obtain a neat design variation in which the crown is not visible from above the watch case. moreover,
Since a screw locking mechanism is not required, the burdensome screw machining is omitted and costs can be reduced.

In addition, even when the reuse ring is pulled out, the reuse ring is engaged with the side pipe via the ring member, so even if a force perpendicular to the axis of the reuse main body is applied to the reuse ring, the small diameter inner circumferential portion will not move through the ring member. The ring member is supported by the side pipe to prevent the reuse ring from rattling, and the ring member always provides an appropriate amount of frictional force when the reuse ring slides.

[Brief explanation of drawings]

Figures 1a and b are a cross-sectional view of a watch showing an embodiment of the present invention and a side view of the crown part, Figure 2 is a cross-sectional view for explaining the operational state of the crown part, and Figure 3 is a conventional example. It is a sectional view of the rear part shown. 5... Trunk, 5a... Counterbore, 5b... Hole, 6
...Side pipe, 6a...Small diameter outer circumference, 6b...Large diameter outer circumference, 7...Reuse body, 7a...Groove portion,
7b...Shaft part, 7c...Volume stem mounting screw part, 7d...
...Unusual part, 7e...Inner wall, 7f...Groove, 8...
...Patsking, 9...Reuse ring, 9a...
Groove portion, 9b...Small diameter inner peripheral portion, 9c...Unusual shaped portion, 9
d... Engaging portion, 9e... Step portion, 10... Ring member.

Claims (1)

[Claims] 1. A shell provided with a downwardly open counterbore formed on a side surface and a hole penetrating inward from the counterbore,
a side pipe fixed to the hole in the body and provided with a protrusion protruding into the counterbore; a shaft portion to be inserted into the side pipe having a winding stem attachment screw portion, a groove portion formed on the outside side of the side pipe; a main body, at least a portion of which is formed with an irregularly shaped part having a larger diameter than the outer periphery of the protruding part;
A small diameter inner circumferential part is formed on the inside and is slidably fitted in the side pipe in the axial direction and has a groove on the inner circumference, and a small diameter inner circumferential part is continuous to the outside of the small diameter inner circumferential part and has an inner diameter from the small diameter inner circumferential part. a large irregularly shaped part that is slidably fitted in the irregularly shaped part of the watch body in the axial direction; and a irregularly shaped part that is formed at the boundary between the irregularly shaped part and the small diameter inner circumferential part so as to be able to engage with the inner wall of the strange shaped part of the watch body. a reuse ring provided with an engaging portion;
The reuse ring and the reuse ring are composed of a ring member that is clamped between the groove of the reuse ring and the outer peripheral surface of the side pipe, and a packing that is compressed between the groove of the reuse main body and the inner peripheral surface of the side pipe. A structure of a crown part for a portable watch, characterized in that a main body can be inserted into a counterbore part of the body.