JPH05172956A - Button device of portable timepiece - Google Patents

Abstract

PURPOSE:To achieve the introduction of air and the reduction of pressure by simple constitution by providing a packing to a button and constituting the packing so as to have a clamping flap at a usual position not pressing the button but no clamping flap at a pressing position. CONSTITUTION:For example, in the case of a front button 2, when the front button is in a usual state by the reaction force of a coil spring 8, a front button packing 4 composed of synthetic rubber has a clamping flap between the inner wall of the button of a middle 1 and the packing 4 and waterproofness and airtightness are held. When switching operation is performed by pressing the button 2, the clamping flap to the packing 4 in the diameter direction of the button is released because a packing introducing guide surface 1a having a conical shape having an angle of about 20-40 deg. with respect to the shaft of the button is formed to the inner wall surface of the middle 1. When the button returns to the usual state, the packing 4 smoothly returns to the interior of the middle 1 by the guide surface 1a and waterproofness and airtightness are again held by the clamping flap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable watch such as a wrist watch and a lantern watch, and particularly to a watch using an air / zinc battery, a watch such as a diver's watch used for saturated diving, which has a large internal pressure of the watch case. It is used for mobile phones for various purposes.

[0002]

2. Description of the Related Art In a conventional watch with a paging function using an air / zinc battery as a portable watch, air is introduced into the watch case by providing a ventilation hole in the case or the like. In addition, as a helium gas resistance of diver's watch used for saturated diving, a seal structure and a seal material that helium molecules are difficult to permeate are being developed,
It was difficult to keep the case internal pressure rise to zero, and the internal pressure rise was inevitable.

[0003]

When the air / zinc battery is used in a conventional watch with a paging function or the like, since a vent hole for introducing air is provided, water droplets such as sweat water and rain water that are taken when carrying the watch are kept inside the watch case. It often penetrated into the body and caused functional abnormality in the watch body.

In the case of a diver's watch used for saturated diving, it is known that the internal pressure of the watch case rises to 0.5 to 15 bar after 300 m of saturated diving.
When the internal pressure of the case was high and the pressure was reduced to atmospheric pressure, functional abnormalities such as glass detachment occurred.

The present invention is intended to solve the above two problems, and it is advantageous in terms of quality and performance without increasing the size of a portable timepiece, and also in terms of cost. To get the device.

[0006]

A button device for a portable timepiece according to the present invention comprises a packing made of synthetic rubber on a button which is constructed so as to be movable on a body for housing a timepiece body, and the packing is a button. The problem described in the preceding paragraph is solved by the construction in which the normal position where the button is not pressed has the tightening allowance and the position where the button is pressed does not have the tightening allowance. The button may be returned by using the reaction force of the switch spring of the watch body or by using an elastic member such as a coil spring installed in the case. Up to 2 to 10 bar for everyday waterproofing, 12.5 to 125 ba for diver's watch
Since it is necessary to endure up to r, it is preferable to use an elastic member such as a coil spring provided on the button portion of the case itself from the viewpoint of guaranteeing water pressure resistance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is a body of a timepiece case for accommodating a timepiece body 11, and a front button 2 is provided on the front side and a lateral side is provided. Is provided with a side button 3, and a packing, a coil spring, and a snap ring are formed in each button portion. The front button portion in FIG. 1 shows an embodiment without a button pipe and a washer, and the side button portion shows an embodiment with a button pipe and a washer.

In the case of returning to the normal position by the reaction force of the coil spring in FIG. 1, in the case of the front button 2, the button packing has a radial interference with the inner wall of the button hole of the case 1, In the case of the button 3, the button 3 has an interference with the inner wall of the hole of the button pipe 10 in the radial direction, so that waterproofness and airtightness are maintained.

FIG. 2 shows a state in which the front button 2 is pressed to perform a switching operation, and the inner wall surface of the body 1 has a conical packing having an angle of 20 ° to 40 ° with respect to the button axis. Since the guide surface 1a for introduction exists, the tightening margin in the radial direction is released, and the airtightness between the inside and the outside of the case becomes open. Therefore, when using an air / zinc battery, air is automatically introduced every time a paging function is called or a switching button operation such as time adjustment is performed, and in the case of a diver's watch used for saturated diving, helium gas penetration Even if the internal pressure rises, the internal pressure automatically returns to the external atmospheric pressure at the touch of a button.

When the button operation state of FIG. 2 is returned to the normal state of FIG. 1, the button packing is smoothly returned by the guide surface of the packing provided on the inner wall of the body 1, and the button packing has a tightening allowance and is waterproof again. It will be airtight.

Although FIG. 2 has been described for the front button portion, the same applies to the side button portion. All of the button packings are coated with a lubricant such as silicon grease.
DOS inside the material such as R (nitrile butadiene rubber)
It is preferable that a self-activator such as (dioctyl sebagate) is contained in a few%.

Further, when the reaction force of the coil spring is used for a diver's watch, the button does not move even with a high water pressure of 10 to 100 bar.

In the drawings, the button is returned by the reaction force of the coil spring provided inside the button.
In the case of usage where high water pressure resistance is not applied, it is possible to use only the reaction force of the switch spring inside the watch body.

Further, the constituent parts of the button are not limited to the front side and the lateral side, and may be on the back side (particularly in the case of a one-piece case in which the back lid and the body are integrated).

[0015]

The present invention has the following effects due to the above-mentioned constitution.

The effect of introducing air or reducing the pressure can be obtained with a simple structure without increasing the number of parts, and the cost responsiveness is excellent.

Since it can be realized in the conventional size without increasing the size of the watch case and there are no design restrictions,
The appearance is great.

Since the purpose was achieved while ensuring the waterproofness and airtightness during normal carrying, the reliability in terms of quality is extremely high.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view showing a normal state of an embodiment of the present invention.

FIG. 2 is a partial vertical cross-sectional view showing a state where a button of one embodiment of the present invention is pressed.

[Explanation of symbols]

 1a ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ side button 4 Coil spring

Claims (2)

[Claims] 1. A packing made of synthetic rubber is formed on a button movably mounted on a body for housing a timepiece,
A button device for a portable watch characterized in that the packing has a tightening margin at a normal position where the button is not pressed, and has no tightening margin at a position where the button is pressed. 2. The portable timepiece according to claim 1, wherein an elastic member such as a coil spring is provided between the button and the case, and a packing guide surface is formed on the inner wall of the case or the inside of the button pipe. Button device.