JPS6288984A - Construction of crown part for portable watch - Google Patents

Abstract

PURPOSE:To improve design without deteriorating a waterproofing function and operability by forming a crown ring and crown body in such a manner that both can be put into a spot facing part of a case band. CONSTITUTION:The spot facing part 5a which opens downward is formed to the side face of the case band 5 and further a hole 5a penetrating the case band 5 is provided toward the inner side of a timepiece. A packing 8 mounted in a groove part 7a is grasped by a pressure between the part 7a and a side pipe 6 to provide a waterproof construction. The crown ring 9 is fitted across both of the large-diameter outside peripheral part 6b of the pipe 6 and the irregular shape part 7d of the crown body 7. The ring 9 is formed with the circular section on the inner side to which a small-diameter inside peripheral part 9b formed with a groove part 9a, an irregular shape part 9c having the inside diameter larger than the inside diameter of the part 9b and making an irregular-shape fit to the part 7d of the body 7, an engaging part 9d, and a step part 9e are formed. The crown part is housed in the spot facing part of the timepiece case and has the good waterproof construction and design.

Description

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

[Conventional technology]

・Generally, in a mobile watch with a crown, the crown protrudes from the outer periphery of the watch case, and the time and time can be determined by pinching the crown with your fingers, pulling it out, and rotating it.
Correct the date, day of the week, etc.

However, in a waterproof watch, if the crown protrudes beyond the outer periphery of the watch case, the crown may move slightly if it receives an external impact such as an object hitting the crown while carrying it underwater. This causes a problem in that the state of uniform compression of the packing provided for waterproof sealing of the rieuse part is disrupted, and water is likely to seep in from the weakly compressed part. For this reason, particularly in high-pressure waterproof portable watches, a screw locking mechanism is provided on the leeue to prevent the leeue 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. It has a side pipe 2 that is fixed to the through hole of the body 10 and has a threaded portion 2a on the outer periphery of the body outer protrusion, and a winding stem attachment part 6C that is inserted into this side pipe 2 and has a winding stem fixed to the inner end thereof. A crown body 3 is provided with a shaft portion 3a and an irregularly shaped portion 3b which is continuous to the outside of the shaft portion 3a and has a diameter smaller than the outer diameter of the threaded portion 2a of the side pipe 2 (both of which are partially larger in diameter); An irregularly shaped part 4a that fits into the irregularly shaped part 3b and is slidable in the axial direction, and a threaded part 4 that is screwed into the threaded part 2a of the side pipe 2.
This structure consists of a crown ring 4 having an engaging portion 4c that can be engaged with the inner surface 3d of the irregularly shaped portion 6b of the crown body 3. That is, the crown body 6 is provided with an irregularly shaped part 6b, and the crown ring 4 is provided with an irregularly shaped part 4a, and by pushing the crown body 3 and screwing the crown ring 4 into the side pipe 2, the crown body B can be pulled out and rotated. Lock the screws to prevent this. When operating the crown, unscrew crown ring 4,
After the crown body 6 and the crown ring 4 are slid until the engaging portion 4C and the inner surface 6a are engaged, the crown body 6 and the crown ring 4 are operated at the same time.

[Problem that the invention seeks to solve]

According to the prior art, watches without a screw lock mechanism have 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 crown body 6 is held by the crown ring 4, there is no need to worry about the waterproof function, but when removing the screw lock, the threaded part 4b of the crown ring 4 is moved outward from the threaded part 2a of the side pipe 2 in the axial direction. Because space is required, it is necessary to ensure the length from the engagement part 4C of the crown ring 4 to the inner surface 6d of the crown body B in the locked state, and also to secure the length between the threaded part 4b of the crown ring 4 and the side nozzle. It is necessary to ensure a length on the axis in which the threaded portion 2a of the tube 2 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 crown body 60 from the outer periphery of the watch case is large, and the protrusion becomes large. Due to the large size and the arrangement of the crown ring 4 to surround the outer periphery of the crown body 3 and the side pipe 2, there was a design problem in that the crown part became too large and conspicuous in appearance. .

On the other hand, if a counterbore is provided in the watch case and a portion of the crown ring 4 is sunk into the counterbore, the amount of protrusion of the crown body 6 from the outer periphery of the watch case can be reduced. When releasing the screw lock, press the crown ring 4.
There was a problem in that it was difficult to rotate it by pinching it with your fingers.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problems and provide a structure for a wristwatch crown that does not reduce waterproof function and operability (improves design, and is advantageous in terms of cost). be.

[Means for solving problems]

The structure of the present invention includes a body 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; The main body of the crown has an irregularly shaped part with a diameter smaller than the outer circumference of the protruding part of a small inner periphery; a deformed part that is continuous with the outside of the small-diameter inner periphery and has a larger inner diameter than the small-diameter inner periphery and is slidably fitted in the deformed part of the crown body in the axial direction; and the deformed part and the diameter a crown ring provided with a mating portion formed at the boundary of the small inner peripheral portion and capable of engaging with the inner wall of the irregularly shaped portion of the crown body; and a crown ring that is sandwiched between the groove of the crown ring and the outer peripheral surface of the side pipe. a ring member that is pressed;
It is characterized in that it comprises a packing that is pressed between the groove of the crown body and the inner peripheral surface of the side pipe, and the crown ring and the crown body 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.

1A and 1B are a sectional view and a side view of the crown portion of a timepiece showing an embodiment of the present invention, and a counterbore portion 5a opening downward is formed on the side surface of the case 5; A hole 5b is provided that penetrates the case 5 toward the inside of the watch.

The side vibro has an outer periphery formed in two stages and has a stepped part, and the inner small diameter outer circumferential part 6a is inserted into the hole 5b and is positioned and fixed by the stepped part, and the outer circumferential part continuous to the small diameter outer peripheral part 6a is inserted into the hole 5b and is positioned and fixed by the stepped part. The side large-diameter outer peripheral portion 6b protrudes from the hole 5b into the counterbore portion 5a, and the shaft portion 7b of the leash body 7 is inserted into the inner periphery of the side eve 6.

A winding stem mounting 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 crown body 7, and a groove part 7a is formed on the outer periphery of this shaft part 7b. An irregularly shaped part 7 that is continuous with the shaft part that is continuous to the outside of the side vibro, and that is formed at least in part to have a larger diameter than the large diameter outer peripheral part 6b of the side vibro.
d, and the inner wall 7e of the irregularly shaped portion 7d has a groove 7f.
is formed. Then, the nokunking 8 attached to the groove 7a is clamped between the groove 7a and the inner periphery of the side pipe B, resulting in a waterproof structure, and the large-diameter outer periphery 6 of the side vibro.
A crown ring 9 is fitted across both the crown body 7 and the irregularly shaped portion 7d of the crown body 7.

The crown ring 9 is formed inside with a circular cross section,
A small-diameter inner peripheral part 9b with a groove 9a formed inside thereof, and a small-diameter inner peripheral part 9b that is connected to the outside of the small-diameter inner peripheral part 9b and has a larger inner diameter than the small-diameter inner peripheral part 9b and fits into the irregularly shaped part 7d of the crown body 7. The irregularly shaped portion 9C is formed at the boundary between the small diameter inner peripheral portion 9b and the irregularly shaped portion 9C and faces the inner wall 7e of the irregularly shaped portion 7d of the crown body 7,
It has a retaining portion 9d that can be secured to the inner wall 7e, and a stepped portion 9e is formed on the inner outer periphery. Then, a ring member 10 made of rubber or synthetic resin attached to the groove part 9a is pressed between the groove part 9a and the large diameter outer peripheral part 6b of the side vibro,
Due to the appropriate frictional force at this time, the crown ring 9 engages with the outer periphery of the side vibro via the ring member 10, and is guided by the side pipe B so that it can slide in the axial direction. When the crown body 7 and the crown ring 9 are pushed in, the outer end surfaces of the crown body 7 and the crown ring 9 are set to be approximately flush with the outer peripheral surface of the barrel 5, and the outer surface of the side vibro The side end portion loosely fits into the groove 7f of the inner wall 7e of the crown body 7.

Next, to explain the operation method, Fig. 2 is a cross-sectional view for explaining the operating state of the crown part. When adjusting the time, date, day of the week, etc. hook onto the stepped portion 9e of the crown ring 90 and pull the crown ring 9 to bring the engaging portion 9d of the crown ring 9 into contact with the inner wall 7e of the crown body 7, as shown in the uppermost figure.

From this state, when the crown 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 crown main body 7 is also pulled out of the barrel 5 by α. It will be done.

By rotating the crown ring 9 in this state, the crown body 7 also rotates as the irregularly shaped portions 7d and 9C fit together, thereby making it possible to adjust the date, day of the week, etc., for example. Further, if the crown 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 crown body 7 and the crown ring 9 in the counterbore 5a of the barrel 5, the outer diameter of the crown ring 9 is small enough to fit within a finger width, so press the outer end surface of the crown ring 9 with your finger. (and the outer end face of the crown ring 9 moves to the position of the outer end face of the crown body 7,
Keep pressing.

If this continues, the crown body 7 is also pressed together, and the crown body 7 is pushed together with the crown ring 9 to a position where it is recessed into the counterbore portion 5a of the barrel 5.

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 receive external shocks that would impede its waterproof function (also, 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 crown body can be stored so as to sink into the body of the watch case, so that objects can come into contact with the crown body, so that the waterproof function of the crown part can be reduced. It is fully reliable.Also, since the crown does not protrude from the outer periphery of the watch case, it is possible to obtain a clean design variation in which the crown is not visible from above the watch case.Furthermore, since there is no need for a screw locking mechanism, the load can be reduced. This screw processing is omitted, and costs can be reduced.

In addition, even when the crown ring is pulled out, the crown ring is engaged with the side pipe via the ring member, so even if a force perpendicular to the axis of the crown body is applied to the crown ring, the small diameter inner circumference It is supported by the side pipe via the ring member to prevent the crown ring from rattling, and the ring member always provides an appropriate amount of frictional force when the crown ring slides.

[Brief explanation of drawings]

Figures 1a and b are a sectional view of a watch showing an embodiment of the present invention and a side view of the crown part, Figure 2 is a sectional view to explain the operating state of the crown part, and Figure 3 is a conventional example. It is a sectional view of the crown part shown. 5... Trunk, 5a... Counterbore, 5b... Hole, 6...
...Side pipe, 6a...Small diameter outer circumference, 6b...Large diameter outer circumference, 7...Crown body, 7a...Groove, 7b
... Shaft part, 7c... Winding stem attachment screw part, 7d... Irregular shape part, 7e... Inner wall, 7f... Groove part, 8... Para kink, 9... Reuse ring, 9a...・Groove, 9
b... Small diameter inner peripheral part, 9c... Irregular shape part, 9d... Engaging part, 9c... Step part, 1o... Ring member. ff11 figure

Claims (1)

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