JPS5844503Y2 - electronic clock push button switch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a button switch portion provided on the back cover, etc., which is a plate-shaped portion of an electronic wristwatch case.

FIG. 1 shows an embodiment of the button switch according to this invention, and is a longitudinal sectional view of the button switch portion of an electronic wristwatch.

FIG. 2 shows a sectional view taken along the line II--II.

This invention will be explained below based on FIGS. 1 and 2.

What is indicated by the reference numeral 1 in the figure is a plate-shaped portion of the wristwatch case.

This plate-shaped portion is, for example, the back cover of a wristwatch case or a relatively flat portion provided adjacent to the front display section.

A hole 1a is bored in this plate-like portion 1, and a bushing 2 is fitted into the hole 1a.

For example, as shown in the figure, two step portions 2 a and 2 b are formed on the outer periphery of the bush 2, and the bush 2 reaches a position where the first step portion 2 a abuts the inner surface 1 b of the plate-shaped portion 1. The inserted bushing 2
is fixed to the plate-shaped portion 1 by, for example, adhesive.

At this time, the upper surface 2C of the bushing 2 is
It is formed flush with the upper surface 1C of.

The inner part of this bushing 2 has a bushing button hole 2d.
There is a packing storage space 2e.

The head 3a of the bush button 3 is in the bush button hole 2d.
are fitted together, and normally their top surface t is flush with the top surface 2C of the bushing 2 and is exposed to the outside.

This button button 3 is composed of three diameter parts, of which the largest diameter part is a head part 3a located on the outside, inside which there is a spring retaining part 3b of intermediate diameter, and There is a switch part 3C with the smallest diameter on the inside,
The entire structure is made of a conductive member.

The shape of the bushing 2 described above is merely an example, and it goes without saying that the bushing used in this invention is not limited to the bushing 2 described above.

Between the outer periphery of the head 3a of the bushing button 3 and the inner periphery of the bushing 2, a packing 4 such as an O-ring stored in the packing storage space 2e is compressed. Retains waterproofness.

The gasket 4 is prevented from escaping from the gasket storage space 2e by a gasket presser 5 provided inside the gasket 4.

The outer periphery of the packing presser foot 5 faces the inner surface of the bushing 2,
It is also an annular plate facing the inner circumference of the head 3a (7) ly + circumference, and is fixed to the bush 2 by contacting the upper surface with the downwardly facing step part of the inner circumference of the bush 2 and then caulking the lower end of the inner circumference of the bush 2. be done.

A hole made in the spring part 6a of the leaf spring 6 is fitted into the spring engaging part 3b of the bush button 3, and the lower edge of the retaining part 3b is fixed by caulking.

Therefore, the bush button 3 is held movably in the axial direction by the leaf spring 6.

As shown separately in FIG. 3, this leaf spring 6 includes a C-shaped base 6b and a square-shaped spring portion 6a sandwiched between the C-shaped base 6b and the base 6b. The crotch portion of the base 6b has an undulating portion 6C, and the spring portion 6a is a portion that is bent up from the base 6b at this undulating portion 6C and is provided parallel to the base 6b.

Then, inside the C-shaped base 6b near the image tip, there is an arc-shaped holding part that is inserted between the second step part 2b of the bushing 2 and the plate-like part 1 and that holds the outer periphery of the bushing 2. There are a, l).

The leaf spring 6 is entirely supported along the plate-shaped portion 1 by fitting the holding portions a, l) into the bushing 2.

In addition, there is the above-mentioned hole near the tip of the spring part 6a,
Hold the button 3.

The spring portion 6a gives the bushing button 3 an outward tendency, and the top surface C of the spring portion 6a comes into contact with the bottom surface 2f of the bushing 2 and stops there.

The leaf spring support structure of the bushing 2 described above is an example of a leaf spring support structure used in this invention.

With the fitting structure as in the embodiment, it is easy to attach the leaf spring, and it is convenient to disassemble and assemble.

However, the leaf spring support structure used in this invention is
The present invention is not limited to such a structure, and includes all structures that support a leaf spring along a plate-shaped portion.

The switch portion 3C of the bushing button 3 is formed facing inward, and its tip face passes through the hole 7a of the shield cap 7 and faces the fixed contact 9 forming an electronic circuit on the circuit board 8.

In particular, in the bush button 3 shown in the embodiments above,
The shape of the spring retaining portion 3b that engages with the spring portion 6a and the shape of the switch portion 3C that contacts the fixed contact can be changed as appropriate.

For example, contrary to the embodiment, an engagement hole may be provided in the spring retaining portion 3b, and the spring portion 6a may be inserted into the retaining hole to hold the button button 3. Ordinary fixing structures or holding structures including adhesives etc. can be applied.

Further, the switch section 3C is also configured such that, for example, a non-conductive member is attached to its tip, and a conductive member is provided at the tip of the non-conductive member, so that when the button is pressed, the type 2 constant contacts on the circuit board 8 are connected. You can.

This idea is constructed as described above.

Therefore, the button 3 is attached to the spring portion 6a of the plate 6.
When pushed inward (in the direction shown by arrow d in the figure) against the For example, by opening and closing the clock, you can adjust the time on the clock.

When the button 3 is released, the button 3 returns to its original position by habit.

In the embodiment shown in the drawings, a recess P with a V-shaped cross section is formed on the top surface t of the bushing button 3, and by inserting the tip of a pencil or the like into this recess P and pressing the bushing button 3, it is possible to press the bushing button 3. It should work.

This invention has the above-mentioned structural effects.

Therefore, according to this invention, since the button can be easily and reliably positioned in the operating direction of the button and in the direction perpendicular thereto, it is possible to obtain a highly reliable button switch that operates reliably. can.

Moreover, since the leaf spring that gives the button its habit is arranged along the plate-like part, the entire structure can be made thin and take up a lot of space.

Not only is the overall configuration simple, but the waterproof parts, which are made up of bushings and gaskets, and the operating parts, which are made up of bushing buttons and leaf springs, can be handled as sub-assemblies. , extremely easy to handle.

Of course, waterproofness is also reliably maintained. Moreover, since a leaf spring is used, even if a plurality of bush buttons are provided, the spring can be shared, which has the great advantage of reducing the number of parts.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the button switch according to this invention, and is a longitudinal sectional view of the button switch portion of an electronic wristwatch. FIG. 2 shows a sectional view taken along line II-II in FIG. 1. FIG. 3 is a plan view of the leaf spring shown in FIGS. 1 and 2. FIG. 1... Plate-shaped portion, 1a... Hole, 2...
...button, 3...button,
3a...Head, 3C...Switch part,
4...Putskin, 6...Leaf spring, 9.
...Fixed contact.

Claims (1)

[Scope of utility model registration request] A plate-shaped part of a watch case, a bushing fixed to a hole in the plate-shaped part, and a bushing movably held within the bushing so that the switch part faces inward and the head is exposed to the outside. a button, a padding compressed between the button and the bushing, and a leaf spring supported along the plate portion by the bushing and holding the bushing button and giving it an outward tendency. and a fixed contact of an electronic circuit that the switch part comes into contact with when the button is pressed against the leaf spring.