JP2002040167A - Wristwatch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wristwatch that prevents backlashes due to external force applied to a crown during underwater use or during washing in a protection case or the like and has improved waterproof properties in the waterproof structure of the wristwatch. SOLUTION: The outer periphery of a crown shaft part is partially inclined from the root to the tip, and the inner periphery of a crown pipe is partially inclined from the outside to the inside of a clock case or either of them is inclined, thus bringing the outer-periphery surface of the crown shaft part into contact with the inner-periphery surface of the crown pipe partially on the periphery surface, and hence preventing biasing due to backlash and improving waterproof properties.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wristwatch, and more particularly to a wristwatch which is free from rattling between a crown pipe and a crown shaft and has excellent waterproofness even when an external force is applied to the crown during use in water.

[0002]

2. Description of the Related Art FIG. 3 is a partial sectional view showing a conventional wristwatch structure. In FIG. 3, a crown pipe 4 is fixed to the watch case 1, a crown 2 has an annular groove 5 provided in a crown shaft portion 7, and a waterproof packing 3 is fitted in the annular groove 5. The winding stem 6 is connected to the crown shaft portion 7 in order to set the time. In this structure, the crown shaft portion 7 of the crown 2 swings inside the crown pipe 4 via the waterproof packing 3, and the waterproofness of the watch case 1 is pressed against the inner peripheral surface of the crown pipe 4. It is kept by waterproof packing 3.

[0003]

In the structure shown in FIG. 3, the crown 2 inserted into the crown pipe 4 has an outer peripheral surface of the crown shaft 7 and an inner periphery of the crown pipe 4 in a direction perpendicular to the axial direction. There is backlash for the distance of the surface gap, and the outer peripheral surface of the crown pipe 4 and crown crown 1
Since the rattling occurs between the inner surface of the crown and the inner surface of the crown by the distance corresponding to the gap, if a large external force is applied to the crown 2 by hitting an object in the water or the like, the crown will interlock with the rattling of the crown 2 Due to the movement of the shaft 7, the uniform compression state of the waterproof packing 3 collapses to a one-sided state, and there is a problem that water is easily immersed in the part where the compression is weakened.

An object of the present invention is to solve the above-mentioned problem and to provide a wristwatch which is free from a biased state due to an external force applied to the crown and is excellent in waterproofness.

[0005]

To achieve the above object, the wristwatch of the present invention employs the following configuration. In the waterproof structure of a wristwatch consisting of a crown, a winding stem, a waterproof packing and a crown pipe, the outer periphery of the crown shaft is partially formed on the slope from the base toward the tip, and the inside circumference of the crown pipe is A part is sloped from the outside to the inside, or one of them is a slope, and the crown shaft outer peripheral surface and the crown pipe inner peripheral surface are partially in contact with the peripheral surface. Features.

(Action) In the present invention, by contacting the outer peripheral surface of the crown shaft with a part of the inner peripheral surface of the crown pipe, a large external force is applied to the crown due to hitting an object in water or the like. Even when the watch is being washed in a protective device such as the one described above, the crown is in contact with the crown and the crown is not in contact with the crown. Uniform compression can be maintained and water can be prevented from entering the inside.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wristwatch according to the present invention will be described below.

(First Embodiment) FIG. 1 is a partial sectional view showing the structure of a wristwatch according to this embodiment. The wristwatch of the present embodiment has a waterproof structure of a wristwatch having a crown 2, a winding stem 6, a waterproof packing 3, and a crown pipe 4, and the outer periphery of the crown shaft portion 7 is partially sloped from the base toward the tip. Thus, a crown shaft slope 8 is formed.

A crown pipe slope 9 is formed on the inner periphery of the crown pipe 4 so that a part of the crown pipe 4 slopes from the outside to the inside of the watch case 1.

The crown 2 has an annular groove 5 provided in the crown shaft portion 7, and a waterproof packing 3 is fitted in the annular groove 5 to uniformly compress the inner peripheral surface of the crown pipe 4 for waterproofing. .

When the crown 2 is inserted into the normal position, the outer peripheral surface of the crown shaft slope 8 of the crown shaft portion 7 and the inner peripheral surface of the crown pipe slope 9 of the crown pipe 4 are partially contacted with each other. I have. If you increase the contact surface,
When the crown 2 is pulled, the resistance increases and the operability deteriorates. For this reason, by changing the slope angles of the crown shaft slope 8 and the crown pipe slope 9 so that only a small part of each slope comes into circumferential contact, the operability is not affected. I have to.

Crown shaft slope 8 and crown pipe slope 9
, The looseness of the gap between the outer peripheral surface of the crown shaft 7 and the inner peripheral surface of the crown pipe 4 can be suppressed, so that the crown does not move and there is no one-sided movement. For example, crown 2 does not move even if a large external force is applied to crown 2 while it is being used in the water, or if a shock is applied from the outside while washing the watch in a protective device such as a net, the crown 2 will not move. , The compression of the waterproof packing 3 is kept uniform,
For this reason, the watch becomes excellent in waterproofness.

(Second Embodiment) FIG. 2 is a partial sectional view showing the structure of a wristwatch according to a second embodiment of the present invention. In the waterproof structure of a wristwatch including the crown 2, the winding stem 6, the waterproof packing 3, and the crown pipe 4, the crown shaft 7 is formed such that the outer periphery of the crown shaft 7 is partially sloped from the base toward the tip to form a crown shaft slope 8. I have.

The inner periphery of the crown pipe 4 is straight as usual, and has a structure in which a slight chamfer is provided on the inner periphery of the crown pipe 4 into which the crown 2 is inserted. With this structure, the crown pipe 4 can be used without any need for processing. By designing such that a part of the slightly chamfered slope and the crown shaft slope 8 which is the outer periphery of the crown shaft portion 7 are in contact with each other, there is a play between the outer circumferential surface of the crown shaft portion 7 and the inner circumferential surface of the crown pipe 4. By suppressing the sticking, crown 2 will not move and there will be no misalignment. With such a configuration, there is an advantage that only part of the components need be designed without newly designing components. In addition, the present invention can be applied to a case in which a slope is formed only in the crown pipe 4 and the crown shaft 7 remains straight as in the conventional shape.

[0015]

As described above, in the waterproof structure of a wristwatch comprising a crown, a winding stem, a waterproof packing, and a pipe, the outer periphery of the crown shaft is partially sloped from the root toward the tip. By forming a slope on the inner circumference of the pipe from the outside to the inside of the watch case, or by forming a slope on either the crown shaft or the inner circumference of the pipe. , Because the outer peripheral surface of the crown shaft part and the part of the inner peripheral surface of the pipe are in contact with each other to prevent rattling of the inner peripheral surface, a large external force is applied to the crown during use in water, The crown does not move even if an external shock is applied while washing the watch in a protective device such as a net, so the crown does not move, so the compression of the waterproof packing is kept uniform and therefore excellent in waterproofness Arm The total.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing a wristwatch according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a wristwatch according to a second embodiment of the present invention.

FIG. 3 is a partial sectional view showing a conventional wristwatch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Watch case 2 Crown 3 Waterproof packing 4 Crown pipe 5 Annular groove 6 True winding 7 Crown shaft section 8 Crown shaft slope 9 Crown pipe slope 10 Crown section

Claims (7)

[Claims] 1. A wristwatch having a crown, a winding stem, a waterproof packing, and a crown pipe, wherein the crown shaft and a part of an inner peripheral surface of the crown pipe are in contact with each other. 2. The wristwatch according to claim 1, wherein one of the crown shaft and the crown pipe has a slope. 3. The crown shaft portion has a part whose outer periphery is inclined from the root toward the tip, or a part of the crown pipe whose inner periphery is directed from the outside to the inside of the watch case. The wristwatch according to claim 2, wherein the wristwatch has a slope. 4. The wristwatch according to claim 1, wherein the crown shaft and the crown pipe have slopes. 5. The crown shaft has a part whose outer periphery is inclined from the root toward the tip, and a part of the crown pipe whose inner periphery is inclined from the outside to the inside of the watch case. The wristwatch according to claim 4, wherein: 6. The wristwatch according to claim 4, wherein a slope angle of the crown shaft and a slope angle of the crown pipe are different. 7. The wristwatch according to claim 1, wherein the crown pipe is in contact with the crown shaft without any space.