JPS636819Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switching device used in a portable watch or the like.

2. Description of the Related Art Conventionally, a portable watch has been proposed in which an inner case incorporating a watch mechanical body is slid from the side into a cylindrical outer case. In this type of watch, in order to make the switch button protrude a certain height forward of the outer case in order to improve the operability of the switch, the thickness of the outer case must be made thicker by the protruding height of the button. Furthermore, it becomes necessary to insert some kind of spacer member between the inner case and the outer case, which has the disadvantage of increasing the thickness of the outer case.

An object of the present invention is to provide a switching device that has a thinner outer case, does not impair the operability of the switch, and is easier to assemble.

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, a front cover 2 is attached to the front of an outer case 1 of a portable digital watch, and push switch buttons 3, 3a and slide switch buttons 4, 4 are located below the front cover.
a and 4b are provided respectively. Each switch can be opened and closed by pressing each switch button 3, 3a or by sliding each switch button 4, 4a, 4b.

In this example, the specific structure of each switch opened and closed by switch buttons 3 and 4 will be explained.

In Figures 1 to 4, an outer case 1 is a thin cylindrical body, and a synthetic resin inner case 5 is housed inside this case, which is slid inward from one side (right side in Figure 1). .

The inner case 5 is provided with button support storage holes 7 and 7a opposite to the switch button holes 6 and 6a provided on the front surface of the outer case 1.
In this example, the switch button holes 6, 6a are one horizontally long hole 1a provided on the front surface of the outer case 1.
It is formed on the frame 8, which is attached to the frame 8.

A switch button support 9 is supported in one of the storage holes 7. The button support 9 has three locking holes 9a, 9b, 9 that face the button hole 6 and pass through the support in the front-rear direction (vertical direction in FIG. 2).
c is provided. Each locking hole 9a, 9b and 9c
The legs 10, 11 and 12 of the push button 3 are inserted into the . In other words, pushbutton 3
The planar shape of the head is rectangular, and the pressing leg 10 with a large diameter is located at the center of the rear side.
On both sides thereof, locking legs 11 and 12 having a smaller diameter and shorter length are provided, respectively. Locking protrusions 11a, 1 are provided at the tips of the locking legs 11, 12.
2a is provided. The pushbutton 3 is inserted from the front of the outer case 1 through the buttonhole 6 and into the legs 10, 11,
12 is attached by fitting and penetrating the locking holes 9a, 9b, 9c of the support body 9, and the button head protrudes toward the front of the outer case 1. As shown in FIG. 2, the locking projections 11a and 12 of the legs 11 and 12
a engages with the engaging surface 9d of the support body 9 to maintain the position of the push button 3 and prevent the button from coming off easily. Note that the engagement force is set so that this engagement can be released as necessary. The tip of the pressing leg 10 is in elastic contact with the center of a bowl-shaped rubber elastic body 14 held on the circuit board 13, facing the support 9. Further, a positioning fitting part 9e is formed in the center of the lower surface of the switch button support 9, as shown in the fourth figure, and a fitting part 14b of the head of the elastic body 14 is fitted into this fitting part. This elastic body is thus positioned at a predetermined position. A contact portion 15 made of conductive rubber is fixed to the lower surface of the center of the elastic body 14. The elastic body 14 can be deformed by pressing the push button 3, and as a result of this deformation, the contact portions 15 are connected to the adjacent conductive portions 16, 16 provided on the circuit board 13.
can come into contact with a. This contact brings electrical conduction between the conductive parts 16 and 16a, closing the switch. The circuit board 13 is attached with screws 1 on the back of the middle case 5.
7..., and these screws are fixed to the inner case with nuts 18....

Furthermore, as shown in FIGS. 2, 3, and 5, a switch button support 19 having a substantially U-shaped cross section is movably stored in the other storage hole 7a, and the support has sliding portions 19a, 19a. is slidable on the front surface of the circuit board 13. The support body 19 has two locking holes 19.
b, 19c are provided. Each locking hole 19b, 19
c, the legs 20 and 2 of the slide button 4 are inserted from the front of the outer case 1 through the switch button hole 6a.
1 is involved. Locking protrusions 20a and 21a provided at the tips of the legs 20 and 21 engage with an engagement surface 19d provided on the support 19, thereby locking the slide button 4 to the support 19.

A bifurcated spring contact piece 22, which is a contact part, is attached to the support body 19, and the tip of this spring contact piece connects to the adjacent conductive part 2 provided on the front surface of the circuit board 13.
3 and 23a can be slidably connected. Slide button 4
With the sliding operation of the spring contact piece 22, both conductive parts 2
The switch can be closed to bring 3 and 23a into conduction.

Next, assembly will be explained.

Attach the circuit board 13 to the back of the inner case 5 with screws 17 in advance, and also attach it to the storage hole 7,
The elastic body 14 is housed in a state in which the elastic body 14 is positioned by the supports 9, 19 and the fitting portion 9e of the support 9, respectively. When the inner case 5 is slid from the side of the outer case 1 and stored, the support body 9 faces the switch button hole 6 of the outer case, and the support body 19 faces the switch button hole 6a. Therefore, as shown by the chain lines in FIG.
When the legs 11 and 12 are inserted toward the locking holes 9
The locking protrusions 11a and 12a pass through b and 9c and engage with the engagement surface 9a of the support body with a certain spring force, and at the same time, the leg body 10 abuts the center portion of the elastic body 14. Similarly, for the slide switch button 4, the legs 20 and 21 are inserted into the locking holes 19b and 19c of the support body 19 from the front, and the locking protrusion 20
a, 21a to engage the engagement surface 19d to fix the button.

The other switch buttons 3a, 4a, and 4b are also attached from the front of the outer case 1 by an insertion method.

Therefore, when the push button 3 is pressed from the position shown by the solid line in FIG. enters,
When the push button is released, the elastic body returns to its original shape and the contact part separates from the conductive part, opening the switch.

Further, when the slide button 4 is set at the position shown by the solid line in FIG.
3 and 23a, the switch is open, but when this button is moved to the position indicated by the chain line, the spring contact short-circuits the conductive parts 23 and 23a, and the switch is turned on.

As explained above, according to the present invention, the push switch button can be attached from the outside of the outer case, so the end of the button can protrude from the outer surface of the outer case without increasing the thickness of the outer case. This makes button operation easier. The elastic body is positioned in advance with the switch button support, and this support makes it easy to attach the button, and the switch button is attached after the mechanical body is assembled in the outer case, which improves assembly efficiency. It has great practical effects, such as being able to increase

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the watch, FIG. 2 is an enlarged cross-sectional view taken along the line of FIG. 1, FIG. 3 is a cross-sectional view taken along the line of FIG. 2, and FIG. FIG. 2 is a cross-sectional view taken along the line in FIG. 2, and FIG. 5 is a cross-sectional view taken along the line shown in FIG. 1...Outer case, 3...Push switch button, 5...Inner case, 6...Switch button hole,
7... Button support storage hole portion, 9... Switch button support, 9a, 9b, 9c... Locking hole, 9e
... Fitting part, 10, 11, 12 ... Leg body, 11
a, 12a...Locking protrusion, 13...Circuit board, 1
4...Elastic body, 14a... Fitting part, 15... Contact part, 16, 16a... Conductive part.

Claims (1)

[Scope of Claim for Utility Model Registration] An outer case with a switch buttonhole, an inner case installed inside the outer case and having a storage hole facing the switch buttonhole, and a circuit fixed to the inner case. a circuit board; an elastic body having a fitting part on the head and a contact part on the lower surface that connects and separates from the conductive part of the circuit board; and an elastic body that is housed in the storage hole of the middle case and faces the switch button hole. a switch button support body having a locking hole and a positioning fitting part that fits into a fitting part of the elastic body to position the elastic body; a leg body passes through the switch button hole and connects the switch button support body; A switching device consisting of a push switch button inserted into a locking hole.