JPH054659Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a button mounting structure suitable for mounting a button in a push button switch.

[Technical background of the invention]

In electronic devices that are used under vibration, such as car-mounted telephones, an operating button is placed between the casing of the phone and a switch provided inside the casing, and by pressing this button, the If a push button switch configured to operate the switch via a button is used, the button may rattle between the housing and the switch due to vibrations when the vehicle is running, causing abnormal noise or causing the switch to malfunction. When the operating pressure of the switch is small, that is, when the switch is operated by a light pressing force, there is a risk that the switch may malfunction due to the above-mentioned rattling.

Therefore, conventionally, as shown in FIG. 3, a configuration has been adopted in which the elastic force of a coil spring is used to press and hold the button on the housing.

In the figure, reference numeral 1 denotes a casing of the telephone, and a button insertion hole 2 is formed in the casing 1, and a button 3 is loosely fitted into the button insertion hole 2.

A switch having a case 4a and an operating part 4b is disposed in the lower area of the button 3,
The switch 4 is disposed on a substrate 5, such as a printed circuit board, which is fixed within the housing 1.

A coil spring 6 is interposed between the button 3 and the switch 4, and the button 3 is urged upward by the elastic force of the coil spring 6.

According to the push button switch having such a configuration, the locking protrusion 3a formed at the lower edge of the button 3 locks into the opening edge 2a of the button insertion hole 2 in the normal state, so that the button 3 The housing 1 is crimped and held, and is prevented from rattling due to vibrations when the vehicle is running.

[Problems with background technology]

However, in the conventional push button switch having the structure as described above, a complicated work process is required when assembling the switch.

That is, first, the button 3 is loosely fitted into the button insertion hole 2 of the case 1 which is turned over, and then the coil spring 6, which is a separate body, is placed on the button 3, and then the board 5 on which the switch is attached is inserted into the The switch 4 must be fixed to the housing 1 while being aligned so that it faces a position corresponding to one end of the coil spring 6, which results in a decrease in mass productivity.

Furthermore, when mass-producing telephones and the like having a push-button switch with the above structure, if a large number of coil springs 6 are placed in one product box, the coil springs 6 become intertwined with each other, making it difficult to take out only one coil spring 6. In the worst case, the coil spring 6 may become deformed and become unusable.

[Purpose of invention]

In view of the above-mentioned circumstances, the present invention aims to provide a button mounting structure that improves assembly efficiency, prevents damage due to deformation of component parts, and improves mass productivity. .

[Summary of the idea]

Therefore, in the present invention, a block-shaped elastic body is used instead of the conventional coil spring as a means for biasing the button, and a protruding attachment part is provided in the center of the back side of the button, and the attachment part is attached to the By configuring the block-shaped elastic body to be fitted and attached, ease of assembly is improved, and deformation of the elastic body as a component is prevented, thereby achieving the above object.

[Example of idea]

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention will be explained in detail based on drawing which shows one Example.

FIG. 1 is a longitudinal cross-sectional view of the main parts of a car phone that adopts the button mounting structure according to the present invention.
The same reference numerals are given to parts having the same functions as those of the conventional button mounting structure shown in the figure.

As mentioned above, in the figure, reference numeral 1 is the housing, reference numeral 2 is the button insertion hole, and reference numeral 3 is the button.
has an operation surface portion 3b and a peripheral wall 3c erected downward from the periphery of the operation surface portion 3b, and the aforementioned locking protrusion 3a is formed on the outer side of the lower end of the peripheral wall 3c.

Furthermore, a cylindrical mounting portion 3d is protruded from the center of the back side of the operation surface portion 3b, and a block-shaped elastic body 20, which will be described later, is fitted into this mounting portion 3d.

On the other hand, below the button 3, as mentioned above, a switch 4 having a case 4a and an operating part 4b is arranged, and this switch 4 is arranged on a board 5 fixedly installed in the housing 1. It is set up.

Further, one end of the block-shaped elastic body 20 is in contact with the actuating part 4b of the switch 4 as an actuated body, so that the movement of the button 3 is transmitted via the block-shaped elastic body 20 to the actuation part 4b of the switch 4 as an actuated body. It will be transmitted to the section 4b.

As is clear from the overall perspective view shown in FIG. 2 with a portion of the block-shaped elastic body 20 in cross section, the block-shaped elastic body 20 includes a fitting portion 20a having a cylindrical shape that fits into the button 3, and a fitting portion 20a having a cylindrical shape that fits into the button 3. and a cushion portion 20b for applying an upward biasing force to 3.

As is clear from the figure, the cushion portion 20b has a cup shape, and a substantially disc-shaped contact portion 20c that comes into contact with the operating portion 4b of the switch 4.
and the outer peripheral edge of this contact portion 20c and the fitting portion 2
0a.

According to the push button switch configured as described above, when the button 3 is in the normal state as shown in FIG.
The locking protrusion 3a is located at the opening edge 2a of the button insertion hole 2.
By coming into contact with the button 3, the button 3 is pressed and held on the housing 1. In other words, according to the above configuration, rattling of the button 3 with respect to the housing 1 is prevented as much as possible.

When the operator presses the button 3 to operate the switch 4, first the cushion portion 20b
deforms so as to be crushed, and then when the button 3 is further pressed down, this pressing force is transmitted from the button 3 via the block-shaped elastic body 20 to the actuating part 4b of the switch 4, and the said actuating part 4b is pushed down, Switch 4 will be activated.

Also, even when the button 3 is pressed on one side, that is, when the button 3 is pressed in a tilted state,
As described above, the cylindrical fitting portion 20a that fits into the button 3 and the outer peripheral edge of the contact portion 20c that is in contact with the actuating portion 4b of the switch 4 are connected to the connecting portion 20.
d, the outer peripheral edge of the contact portion 20c moves as the button 3 is tilted, thereby pressing down the actuating portion 4b of the switch 4, thereby ensuring that the switch 4 is activated. This results in a switching operation.

On the other hand, when the operator releases button 3,
The button 3 returns to its normal state due to the cooperative action of the elastic return force of the operating portion 4b of the switch 4 that attempts to return to the initial position and the elastic return force of the cushion portion 20b of the block-shaped elastic body 20. becomes.

Below, the assembly order of an electrical device that employs the button mounting structure according to the present invention will be explained in detail.

First, before the overall assembly work, the fitting part 20a of the block-shaped elastic body 20 is fitted into the attachment part 3d of the button 3, and the button 3 and the block-shaped elastic body 20 are integrally assembled.

At this time, since the depth D' of the fitting part 20a and the H' of the mounting part 3d are set to the same dimension,
When the block-shaped elastic body 20 is fitted into the attachment portion 3d, the cushion portion 20b of the block-shaped elastic body 20 occupies the lower part of the attachment portion 3d.

Next, as described above, the button 3 integrated with the block-shaped elastic body 20 is loosely fitted into the button insertion hole 2 of the turned-over housing 1, and then the board 5 on which the switch 4 is attached is inserted between the switch 4 and the block. What is necessary is just to fix to the housing|casing 1, making the cushion part 20b of the shaped elastic body 20 contact|abut.

As mentioned above, when assembling the push button switch, the button 3 and the block-shaped elastic body 20 can be assembled together in advance before the overall assembly work, so the ease of assembling the push button switch is streamlined. It becomes easy to aim for.

Furthermore, in the above-described configuration, an elastic block (block-shaped elastic body 20) is used instead of the conventional coil spring (see FIG. 3) as a means for biasing the button 3 upward, so that the push button switch is When mass-producing in-vehicle telephones equipped with such a device, even if a large number of block-shaped elastic bodies 20 are stored in one parts box, they do not become entangled with each other as in the case of conventional coil springs 6, making it easy to take out the parts. Then,
It has also become possible to eliminate deformation and damage to parts due to excessive loads.

Although this embodiment shows an example in which the button mounting structure of the present invention is applied to a push-button switch in an in-vehicle telephone, it can also be applied to electronic equipment that is subject to vibrations, such as a telephone or radio cassette with a speaker inside its housing. By applying this invention to push button switches used in recorders etc.
Of course, this also effectively acts against slight vibrations of the housing when the speaker is operated.

Further, in the above embodiment, the actuating portion 4b of a switch is pressed down by an elastic body, but the present invention is not necessarily limited to a switch, and can be applied to, for example, a release of a lock mechanism, a button portion, etc.

[Effect of idea]

As described in detail above, according to the button mounting structure according to the present invention, a protruding mounting portion is provided at the center of the back side of the button, a block-shaped elastic body is fitted into this mounting portion, and the block-shaped elastic body is fitted into the mounting portion. By bringing one end of the shaped elastic body into contact with the actuated body and holding the button crimped to the housing,
In addition to improving assembly efficiency, damage due to deformation of component parts can be prevented, and mass productivity of electronic devices equipped with push button switches can be improved.

Further, according to the button mounting structure according to the present invention, the block-shaped elastic body has a cylindrical fitting part, a contact part that comes into contact with the actuated body, and an outer part of the fitting part and the contact part. As the button is made up of a connecting part that connects to the peripheral edge, even if the button is tilted and pressed, the outer peripheral edge of the abutting part will move down with the button operation via the mounting part and the connecting part, and the switch will not be activated. Since the switch 4 is actuated by pressing down the actuating portion 4b of the switch 4, it is possible to respond to a single press of the button by the operator, thereby ensuring a reliable switching operation.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the main part of the button mounting structure according to the present invention, and FIG. 2 is a partially cutaway view of the entire block-shaped elastic body in the embodiment shown in FIG. 1. The perspective view and FIG. 3 are longitudinal sectional views of a conventional button mounting structure. 1... Housing, 3... Button, 3d... Mounting part, 4... Switch, 4a... Case, 4b...
Actuating part (actuated body), 20... block-shaped elastic body,
20a... Fitting part, 20b... Cushion part, 2
0c...Abutment part, 20d...Connection part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A button with an attachment part provided in the center of the back side, a cylindrical fitting part that fits into the attachment part, and an abutment that comes into contact with the actuated body. a block-shaped elastic body having a contact part and a connection part connecting the outer peripheral edge of the contact part and the fitting part; the block-shaped elastic body is assembled to the button; A button mounting structure characterized in that the button is held by pressure on a housing by bringing the contact portion of the body into contact with the actuated body. (2) Utility model registration claim No. (1) characterized in that the block-shaped elastic body is formed of a rubber-like member.
The mounting structure of the button described in section.