JPH0622984U - Dust proof watch - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a dust-proof watch with a simple structure that prevents the intrusion of iron powder into the watch case. [Structure] A watch case 2 including a watch body 7 and having a time display portion 8 on the front surface, and a support frame 1 to which the watch case 2 is joined. The support frame 1 and the watch case 2 are joined to each other. A magnetic elastic body 9 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a simple dust-proof watch that prevents iron powder from entering the watch case.

[0002]

[Prior art]

 In a clock installed on a railway platform or near a railway, iron powder scattered by wear of the train wheels and the railway rail may enter the inside of the watch case. The iron powder that has entered may reach the circuit board inside the watch case and cause various problems such as a short circuit on the circuit or a malfunction of the machine.

Therefore, in order to prevent the iron powder from entering the inside of the watch case, a rubber packing is interposed at the joint between the watch case and a support frame that supports the watch case, or putty, silicone resin, or the like is used. By coating and sealing with, dust-proof measures were taken, such as filling in the gaps where iron powder would enter.

[0004]

[Problems to be solved by the device]

 Among the above-mentioned conventional techniques, in the structure in which the rubber packing is interposed to fill the gap, the rubber packing needs to be compressed to some extent, so that the watch case side needs to have a certain degree of rigidity. There are restrictions such as the fact that metal must be used as the material. Further, the rubber packing may lose its original purpose, such as the elasticity thereof being deteriorated due to long-term compression and a gap may be generated.

In the configuration in which putty, silicone resin, or the like is coated and sealed instead of the rubber packing, it is not necessary to compress it like the rubber packing, but the watch case is removed from the support frame for the purpose of repairing troubles inside the watch. When removing and reattaching to the support frame, it is necessary to carry out a sealing operation for coating putty or silicone resin each time, which is very troublesome.

The present invention has been proposed in view of the above-mentioned prior art, and an object thereof is to provide a dust-proof timepiece having a simple structure and preventing iron powder from entering the timepiece case.

[0007]

[Means for Solving the Problems]

 The dust-proof timepiece of the present invention for achieving the above object comprises a timepiece case having a timepiece built-in and a time display portion on the front surface, and a support frame to which the timepiece case is joined. A magnetic elastic body is provided at the joint portion with.

The watch case is provided with a time setting hole, and a magnetic plate may be provided near the time setting hole.

[0009]

【Example】

The present invention will be described below with reference to an embodiment applied to a double-sided display type LED light emitting timepiece. As shown in FIGS. 1 and 2, watch cases 2 are joined to the front and back of a support frame 1 whose front shape is a horizontally long rectangle. Two suspension columns 3 and 3 project from the upper surface of the support frame 1, and the upper ends of the suspension columns are fixed to a ceiling (not shown). Inside the support frame 1, there are provided fixing plates 4 and 4 having a U-shaped cross section for fixing the above-mentioned supporting columns 3 and 3. The front and rear surfaces of the fixing plates 4 and 4 have hooks 5 and 5, respectively. Is fixed. The hooks 5 and 5 are formed with claw portions 5a and 5a that are bent in an L shape and project toward the front. Brackets 6 and 6 are fixed to the inner rear surfaces of the watch cases 2 and 2. The brackets 6 and 6 are formed with windows 6a and 6a which engage with the claws 5a and 5a of the hooks 5 and 5, respectively. The windows 6a, 6a have a shape in which two rectangular portions communicate with each other in a stepped manner, as shown by the broken line in FIG. 1, and when the watch case 2 is attached to the support frame 1, the windows 6a, After penetrating the claw portion 5a into the rectangular portion at, the watch case 2 is displaced to the left with respect to the support frame 1, and then downwardly displaced to the rectangular portion at the upper side of the window 6a. 5a is engaged. By the engagement of the claw portion 5a with the window 6a in this manner, the watch case 2 is joined to the support frame 1. When detaching the watch case 2 from the support frame 1, it may be carried out in the reverse order of attachment. In the inside of the watch case 2, LED light-emitting watch bodies 7 and 7 are incorporated,
The time is displayed by digital numbers (Fig. 1) through the translucent covers (time display parts) 8 provided on the front surfaces of the clock cases 2 and 2. As shown in FIGS. 2 and 3, on the outer peripheral portions 1a, 1a on the front and back sides of the support frame 1,
Magnetic elastic bodies (rubber magnets) 9 ... Are adhered over the entire area. As shown in FIG. 3, long-size rubber magnets 9 and 9 are adhered to the upper and lower sides of the outer periphery of the front and rear surfaces of the support frame 1, and short-sized rubber magnets are attached to the right and left sides. Gnets 9 and 9 are adhered to each other. Therefore, as shown in FIG. 2, the rubber magnet 9 is interposed at the joint between the support frame 1 and the watch cases 2 and 2, and the iron powder reaching the gap between the support frame 1 and the watch case 2 is reached. Is attracted by the rubber magnet 9 and does not enter the inside of the watch case 2. As shown in FIG. 4, the right side surface of the watch case 2 has a through hole 2a ...
Is provided. As shown in FIG. 5, the time setting buttons 10 ... Connected to the timepiece body 7 are located at the back of the holes 2a. The time setting buttons 10 ... are, in order from the top, for hour unit setting, minute unit setting, and reset / start. The magnetic plate 11 made of a magnetic elastic material is formed on the inner surface of the through-hole 2a of the watch case 2.
Is provided. As shown in FIG. 5, the magnetic plate 11 is provided with holes 11a ... Corresponding to the through holes 2a. Therefore, the iron powder reaching the through holes 2a ... Is adsorbed by the magnetic plate 11 and does not enter the timepiece case 2. When setting the time, it suffices to insert the thin rod-shaped member 12 into the predetermined through hole 2a and press the button 10. Although the present embodiment has been described with reference to a double-sided display type LED light emitting timepiece,
The present invention is not limited to this, and may be applied to a single-sided display type timepiece or a hand display (analog) type timepiece. The timepiece body 7 may be provided inside the support frame 1 instead of inside the timepiece case 2.

[0010]

[Effect of device]

 As described above, according to the dustproof timepiece of the present invention, since the elastic magnetic body (rubber magnet) is interposed between the timepiece case and the support frame, the timepiece does not have to be compressed like normal rubber packing, and the timepiece does not need to be compressed. It is possible to prevent iron powder from entering the case. Further, even when the watch case is removed from the support frame and attached to the support frame again for the purpose of repairing the inside of the watch, it is not necessary to carry out sealing work each time like putty or silicone resin. . Furthermore, since the magnetic plate is provided in the vicinity of the time setting hole, invasion of iron powder from this hole can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a front view of a dustproof timepiece to which the present invention is applied.

FIG. 2 is an enlarged vertical sectional view of FIG.

3 is an exploded perspective view of FIG. 1. FIG.

FIG. 4 is an enlarged right side view of FIG.

5 is an enlarged cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Support Frame 2 Watch Case 2a Time Setting Hole 7 Watch 8 Time Display 9 Magnetic Elastic Body 11 Magnetic Plate

Claims (2)

[Scope of utility model registration request] 1. A watch case including a watch body and having a time display portion on the front surface, and a support frame to which the watch case is joined, wherein a magnetic field is provided at a joining portion between the support frame and the watch case. A dustproof timepiece having an elastic body. 2. The dust-proof timepiece according to claim 1, wherein the timepiece case is provided with a time setting hole, and a magnetic plate is provided in the vicinity of the time setting hole.