JPH11126539A - Hinge type push button attaching apparatus for push button switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single elastic arm-using type push button attaching apparatus which can precisely arrange push buttons in positions relative to button holes and prevents appearance impairment by simple constitution even in the case an elastic arm is deformed before assembly. SOLUTION: The axes of push buttons 4 are intentionally biased to the axes of button holes 2 to apply dynamic bias to the push buttons 4 in assembling the buttons 4 and even when the elastic arms 5 of the push buttons 4 are deformed, the deformation is therefore compensated and the push buttons 4 can be assembled while the relative positions of the push buttons 4 to the button holes 2 being kept precisely. Further, protrusions 9 for sliding such as projected strips are formed in the axial directions in the side faces of the push buttons 4 in the biased direction or side faces of the button holes 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge-type push button mounting apparatus in which a push button is continuously provided on a supporting frame by integral molding with an elastic arm interposed therebetween. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge type push button mounting device for a push button switch, wherein one push button can be mounted at the center of a button hole while being supported by a single elastic arm.

[0002]

2. Description of the Related Art As a conventional hinge type push button mounting apparatus, a push button A is supported by a support frame C by two elastic arms B as shown in FIGS. 6 (a) and 6 (b). 6C, or as shown in FIG. 6C, the push buttons A are integrally formed so as to be supported by the support frame C by a single elastic arm B, and each of the push buttons A has a button hole. D is located at the center.

[0003]

As shown in FIGS. 6 (a) and 6 (b) in the above conventional structure, in the case of a type using a plurality of elastic arms, the position of the push button A with respect to the button hole D is determined with high precision. On the other hand, since the elastic arm B requires a relatively large occupied volume, the size of the device is increased due to an increase in the button pitch, and the design is restricted. In the case of the type using a single elastic arm as shown in (c), since the volume occupied by the elastic arm B is small, the device can be downsized by reducing the button pitch, and there are few restrictions on the design. Although there is an advantage, it is difficult to maintain the position of the push button A stably, so that it is necessary to take measures for accurately maintaining the position of the push button A with respect to the button hole D.

[0004] In the case of the single elastic arm type, the push button A is liable to deform the elastic arm B particularly during handling and transportation. When the push button A is assembled using the deformed push button A, the button hole D is formed. The position of the push button A is shifted or deflected to cause a poor appearance. Therefore, it is extremely costly to handle, pack, and transport the elastic arm B in a state where the deformation of the elastic arm B is prevented. There is a disadvantage to worship.

As a measure for accurately maintaining the position of the push button with respect to the button hole, it is conceivable to make the gap between the button hole and the push button as small as possible or to make the elastic arm thick and strong. If the gap between the button and the push button is made narrow, there is a disadvantage that functional failure is likely to be caused by the adhesion of dust or sticky liquid such as juice or coffee. In this case, not only the click feeling is impaired, but also the durability of the elastic arm is reduced due to lack of elasticity. Therefore, these disadvantages are eliminated, and the position of the push button with respect to the button hole is always accurately maintained. A push-button mounting device using a single elastic arm that can be used is desired.

Accordingly, an object of the present invention is to provide a simple structure in which the position of the push button with respect to the button hole is accurately maintained even when the elastic arm is deformed before assembly. It is an object of the present invention to provide a single elastic arm type push button mounting device which can be assembled to prevent appearance failure.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is manufactured such that the axis of the push button is deliberately deviated from the axis of the button hole, in other words, the push button has a mechanical axis. A bias is applied, and a sliding convex portion is provided on the side surface of the push button or the side surface of the button hole in the deviated direction. Thus, even if the push button has an elastic arm deformed, the position of the push button with respect to the button hole is reduced. Can be assembled in a state where they are accurately held, and appearance defects can be prevented.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hinge type push button mounting device according to the present invention.

As a push-button switch to which the present invention is applied, for example, as shown in FIGS. 1 to 3, a button hole 2 for a ten-key pad is juxtaposed on a top wall 1 of a telephone case. A grid-like support frame 3 corresponding to the arrangement of the button holes 2 is provided.
The button unit 6 is integrally formed of plastic under the condition that the button unit 6 is aligned with the arrangement of the button holes 2 while being individually supported by the single elastic arms 5 in the shape of a letter. The push button 4 is fixed to the inner surface of the top wall 1 of the housing in a state in which the push button 4 protrudes moderately outward from the button hole 2, and furthermore, the inside of the housing is substantially parallel to the top wall 1 or moderately inclined. A printed circuit board 7 is fixed in this state, and a so-called rubber contact type switch 8 is disposed on the printed circuit board 7 at a position corresponding to each push button 4, and its passive top is pressed against the drive surface of the push button 4. Thereby, the push button 4 is supported by the elastic arm 5, and at the same time,
A rubber contact type switch 8 is used to keep the outward push-up tendency.
And a type in which the contacts of the switch 8 can be closed by pressing from above against the rubber contact type switch 8.

As a special configuration of the present invention for a push button switch of the above type, for example, as shown in FIGS.
As shown in FIG. 4 (a), the axis of the push button is intentionally deviated in both the vertical and horizontal directions (diagonal direction) with respect to the axis of the button hole 2, and the axial direction of the push button in the deviated direction is The sliding protrusion 9 is provided. When the button unit 6 is attached to the top wall 1 of the housing, the push button 4 is moved to the button hole 2 as shown in FIG. The push button 4 with respect to the button hole 2 is held in an accurate position even when the elastic arm 5 is deformed during handling or transportation before assembly, so that the push button 4 is pressed against the side surface of the button hole 2. Not only can it be assembled in a state to prevent appearance defects, but also the push button 4 can be kept in a normal position when the push button 4 is pressed, and the side surface of the button hole 2 and the sliding convex portion 9 can be rubbed. Due to low resistance It can be lightly performed pressing and restore operations.

Note that the sliding protrusion 9 has a push button 4
It is desirable to form only the portion near the lower end of the push button 4. In the illustrated embodiment, the sliding convex portion 9 is provided on the side surface of the push button 4.
The effect may be equivalent.

The shape of the sliding projection 9 is desirably an axial ridge as in the embodiment shown in FIGS. 1 to 3, but is more preferably than the upper edge of the button hole 2 as shown in FIG. It may be formed stepwise at a slightly lower position, or may be formed stepwise at a position slightly lower than the upper edge of the side surface of the button hole 2 as shown in FIG.

The shape of the push button 4 is not limited to a rectangle, but may be a circle or an oval. In this case, the push button 4 may be biased in any one direction.
Further, the shape may be triangular, pentagonal, or irregular. In this case, the push button 4 may be biased in any one of the apex angles as much as possible.

[0014]

As described above, according to the present invention,
The following effects can be obtained.

The button unit 6 is manufactured by intentionally deviating the axis of the push button 4 with respect to the axis of the button hole 2 and providing an axial sliding protrusion 9 on the side of the push button in the deviating direction. When the push button 4 is attached to the housing, the push button 4 is forcibly inserted so that the sliding projection 9 is pressed against the side surface of the button hole 2, so that a particularly simple configuration can be achieved without using any special additional member. Even if the elastic arm 5 is deformed at the time of handling or transportation before assembling, the push button 4 with respect to the button hole 2 is assembled in a state where the push button 4 is held at an accurate position to easily prevent a defective appearance. Not only can the push button 4 be pressed, but also the push button 4 can be kept in the normal posture when the push button 4 is pressed.

By providing the step-like sliding convex portion 9 at a position slightly lower than the upper end edge of the button hole 2, the sliding convex portion 9 can be formed in a state where it does not become an obstacle.

By adopting an axial ridge as the sliding convex portion 9, the resistance due to sliding friction with the side surface of the button hole 2 is significantly reduced, and the pressing operation and the restoring operation can be performed lightly.

Since the axis of the push button 4 is intentionally deviated from the axis of the button hole 2, it is not necessary to ensure the exact position of the axis at the time of molding, and therefore the accuracy of the molding die is reduced. Even if it does, there is no problem, so that the cost of the molding die can be reduced.

The elastic arm 5 during handling and transportation
Even if slight deformation occurs, if the deformation is less than the amount of deviation at the time of design, the assembly can be assembled in a state where the deformation is compensated. It can be simplified.

Not only the appearance defect rate of the push button 4 is remarkably reduced, but also the number and time required for the appearance inspection can be reduced, so that the manufacturing cost can be reduced as a whole.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view illustrating a pushbutton switch to which a hinge-type pushbutton mounting device of the present invention is applied.

FIG. 2 is a longitudinal side view of the device of FIG. 1;

FIG. 3 is a perspective view of a main part of the apparatus of FIG. 1;

FIG. 4 is a plan view illustrating a relationship between a push button and a button hole.

FIG. 5 is a longitudinal sectional side view of a main part showing another embodiment.

FIG. 6 is a plan view of a conventional hinge-type push button structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top wall 2 Button hole 3 Support frame 4 Push button 5 Elastic arm 6 Button unit 8 Switch 9 Sliding convex part

Claims (4)

[Claims] 1. A button hole (2) is juxtaposed to a top wall (1) of a housing, and a grid-like support frame (3) corresponding to an arrangement of the button holes (2) is provided for the button hole (2). A button unit (6) is integrally formed of plastic while the push buttons (4) are individually supported on the support frame (3) by a single elastic arm (5). The button unit (6) is fixed to the housing with each of the push buttons (4) appropriately projecting outward from the button hole (2), and the push button (4) is provided inside the housing. In the push button switch of the type in which the switch (8) is disposed corresponding to the above, the axis of each push button (4) is intentionally deviated with respect to the axis of the button hole (2), and the direction of the deviation is changed. An axial sliding projection (9) is provided on the side of the push button, and the button unit (6) is attached to the housing. The push button (4) is forcibly inserted so that the sliding protrusion (9) is pressed against the side surface of the button hole (2) when attaching the hinge. apparatus. 2. A hinge-type push button mounting device for a push button switch according to claim 1, wherein a step-like sliding projection (9) is provided at a position slightly lower than an upper edge of the button hole (2). 3. The hinge-type push button mounting device for a push button switch according to claim 1, wherein a sliding convex portion (9) of the ridge is adopted. 4. A hinge type push button mounting device for a push button switch according to claim 1, wherein said sliding protrusion (9) is not provided on said push button (4). And a hinge type push button mounting device for a push button switch formed on the side surface of the button hole (2).