JPS601476Y2 - Push button mounting structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push button mounting structure that has a simple configuration, a small number of parts, and is easy to assemble.

Conventionally, this type of push button was attached to one end of an operating rod disposed inside the device body, and was made to protrude to the outside, and by pressing the push button, a switch etc. was operated, and the device body was operated. The push button is controlled so that the push button is returned to its original position using an elastic member such as a spring.

However, such a configuration has the disadvantage that the number of parts is large, making manufacturing and parts management troublesome, resulting in high costs, and the assembly process takes a long time, resulting in poor productivity.

Furthermore, when the device is disassembled for repair or maintenance inspection due to failure, there are inconveniences such as parts being lost.

This invention has been improved in view of the above circumstances.
By rotatably assembling the push button to the case body at the same time as the case body is assembled, the number of parts can be minimized, making manufacturing and assembly work extremely easy and making the entire device cheaper. Mounting provides structure.

Hereinafter, one embodiment of the push button mounting structure according to the present invention will be described in detail based on the drawings.

Fig. 1 is an external perspective view showing an embodiment of the present invention applied to a digital watch, Fig. 2 is an exploded perspective view of the case body, Fig. 3 is a perspective view of main parts showing details of the push button mounting structure, Fourth
The figure is a sectional view taken along the line I-I of FIG. 1.

In these figures, a digital watch 1 includes a case body 4 formed by integrally joining shallow box-shaped first and second case pieces 2 and 3 that are separately molded from a synthetic resin material.
Various mechanisms and members such as a printed circuit board 5, a liquid crystal display mechanism 6 fixed to the printed circuit board 5, and an alarm mechanism (not shown) are housed within the case body 4, and normally the first It is used in an upright state as shown in FIGS.

Of the first and second case pieces 2 and 3, the first case piece 2 constituting the front side of the digital watch 1 has a fitting protrusion 7 integrally protruding from the periphery of the opening on its back surface. , a pair of hook-shaped engaging pieces 9a, 9b (9b not shown) are provided integrally at approximately the center of the rear end surfaces of both left and right sides 8a, 8b, respectively, and the fitting protrusions 9b are not shown. The strips 7 are fitted and engaged along the inner wall surface of the second case piece 3 that constitutes the back side of the digital watch 1, and the pair of engaging pieces 9a and 9b are inserted into the left and right sides of the second case piece 3. By fitting and engaging the engaging recesses 10a and 10b formed on the inner wall surface of the surface,
It is designed to be integrally combined with the second case piece 3.

In the divided portion of the upper surface of the case main body 4, there is a first
A push button mounting opening 11 is formed by cutting corresponding parts of the upper surface periphery of the second case pieces 2 and 3, and the push button mounting opening 11 is integrally formed of synthetic resin. It is closed by a flat push button 12 formed therein.

The push button 12 is formed to be slightly smaller than the push button mounting opening 11, and a pair of horizontal shafts 13a and 13b are coaxially protruded from approximately the center of both left and right sides of the push button 12.

Further, a stopper piece 15 is integrally provided on the front end of the push button 12, that is, the end 14a on the side of the first case piece 2, and a stopper piece 15 is integrally provided on the back surface of the end 14a. A protrusion 16 is provided vertically.

A pair of substantially U-shaped bearings 18a and 18b are formed on both side edges of the opening end of the notch recess 17 formed in the upper peripheral edge of the second case piece 3, and the notch recess 17 A push button receiving portion 20 is integrally provided on the bottom edge portion 19 of the push button holder 20 .

The push button receiving portion 20 is provided at a position lower than the upper surface of the second case body 3 by the thickness of the push button 12.

On the other hand, among the fitting protrusions 7 protruding from the first case piece 2, the portion corresponding to the l pair of bearing parts 18a, 18b formed on the second case piece 3, that is, the first The distal end side of the fitting protrusion 7 is notched in a portion continuous with the left and right side edges of the cutout recess 21 formed on the upper surface of the case piece 2, thereby forming a stepped portion that restricts the movement of the push button 12 in the front-rear direction. 2
2a.

22b is formed.

That is, the pair of shafts 13a, 13b are connected to the bearing portions 18a, 1.
8b, respectively, and place the push button 12 in the notch recess 17 of the second case piece 3, and then
When the is integrally connected to the second case piece 3, the pair of stepped portions 22a and 22b fit into the recesses of the bearing portions 18a and 18b, respectively, thereby allowing the shafts 13a and 13b to move in the front and back direction. is configured to prevent

In this case, in the push button 12, the upper surface of the stopper piece 15 comes into contact with the back side peripheral edge of the notch recess 21 formed in the first case piece 2, and the rear end of the push button 12, that is, on the second case piece 3 side. The end portion 14b is attached so as to be placed on the push button receiving portion 19.

Therefore, when the front end portion 14a of the push button 12 is pressed with a finger, the push button 12 is rotated only in the direction of the arrow 25 shown in FIG. The protrusion 16 presses, for example, a leaf switch 26 attached to the printed circuit board 5 to elastically deform it, and brings it into contact with a contact 27 provided on the printed circuit board 5 corresponding to the leaf switch 26. The operation of the alarm mechanism is controlled.

Note that the push button 12 is normally held almost horizontally because the front end 14a is always biased in the direction of floating by the spring force of the leaf switch 26, and the rotation range of the push button 12 during the pressing operation is limited. is regulated by the lower surface of the front end portion 14a coming into contact with the upper end surface 5a of the printed circuit board 5.

Furthermore, what is indicated by the reference numeral 30 is a stand plate, and this stand plate 30 has an integrally protruding shaft 31 that is attached to the halves provided on the first case piece 2 and the second case piece 3 when the case body 4 is assembled. Bearing hole 3 composed of circular notches 32 and 33
4 is prevented from coming off and is rotatably supported, so that the case body 4, in other words, the digital watch 1, is stored in the stand plate storage recess 35 formed on the bottom of the case body 4, and the case body 4, in other words, the digital watch 1, is stored on the shelf. Alternatively, when placed upright on furniture etc., the surface area of the bottom of the case body 4 can be substantially reduced by rotating approximately 90 degrees as shown by the chain line in FIG. 4 or FIG. It is wide enough to prevent the digital watch 1 from tipping over in the front-back direction.

Therefore, according to the push button mounting structure configured as described above, the push button 12 integrally formed of synthetic resin is attached to the case body 4.
It can fully perform its functions simply by incorporating it into the device, so there is no need for any accessory parts such as operating rods or springs, and the number of parts can be significantly reduced.

Therefore, compared to the conventional structure, manufacturing and parts management are simpler and easier, and since the push button 12 is easy to assemble, the time required for the assembly process can be shortened and productivity can be improved. There are advantages such as

In addition, in the above embodiment, the second case piece 3 has a bearing portion 18a,
18b is provided, but this invention is not limited to this in any way, and it goes without saying that it may be provided on the first case piece 2.

Further, in the above embodiment, the first case piece 2 is connected to the case body 4.
Although the description has been made with the second case piece 3 on the front side and the second case piece 3 on the rear side, the reverse may be possible.

Furthermore, although the above embodiment has been described with reference to the case where it is applied to a digital clock, it is of course applicable to any electrical equipment that requires button operation, such as tape recorders, stereos, televisions, etc.

As explained in detail above, according to the structure of the push button mounting according to the present invention, a push button formed by integrally protruding a shaft and a protrusion for switch operation is integrated with two case pieces formed separately. Since the structure is such that it is connected to the case body and assembled at the same time when the case body is assembled, and is rotatably held by both case pieces, the structure is simpler than the conventional structure, and the number of parts, manufacturing man-hours, and assembly man-hours are reduced. As a result, the entire device can be provided at a low cost, which is a great effect.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing an embodiment of the push button mounting structure according to the present invention applied to a digital watch, Fig. 2 is an exploded perspective view of the case body, and Fig. 3 is a detailed structure of the push button mounting structure. FIG. 4 is a sectional view taken along line II in FIG. 1,
FIG. 5 is a bottom view of the case body. 1...Digital watch, 2...First case piece, 3...Second case piece 1.4...
...Case body, 11...Push button mounting opening,
12...Push button, 13a, 13b...shaft, 14a, 14b, curve, end of push button, 15...
Stopper piece, 16... Protrusion for switch operation,
17, 21... Notch recess, 18a, 18b...
...Bearing part, 19...Bottom edge of notch recess.

Claims (1)

[Scope of utility model registration request] A case body formed by integrally joining two case pieces molded in two, and a push button mounting formed in a part of the divided part of the case body by cutting out the peripheral edges of both case pieces. a pair of bearings formed on both side edges of the opening end of the notch recess cut out in the one case piece; and a push button receiver provided at the bottom edge of the notch recess. , L pairs of shafts pivotally supported by the bearing portion are provided protrudingly, a stopper piece is provided protrudingly from one end of the other case, and a switch operating protrusion is provided vertically from the back surface of this end; a push button disposed facing the push button mounting opening, the push button having one end of the one case placed on the push button receiver, and a stopper piece formed on the other case piece. The push button mounting structure is characterized in that the end of the other case side can be exposed into the case body by engaging with the peripheral edge on the back side of the cutout recess.