JPS6129149Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push button device for a tape recorder, etc., and more specifically, an elastic piece made of an elastic material such as resin, which is provided coaxially with the push button and rotates integrally with the push button, is connected to the push button. When pressed, the operating rod applies elastic deformation, and this elastic deformation generates a force that urges the push button in the rotating direction. By preventing the push button from swinging, and furthermore, by loading a spring between the cabinet and the push button to further urge the push button in the return direction when one end of the push button and the cabinet are in contact with each other when the push button returns. This invention relates to a push button device that eliminates uneven return positions of push buttons.

Cassette tape recorders are equipped with multiple push buttons for operations such as recording, playback, rewind, fast forward, and stop, but if these push buttons are installed integrally with the mechanism, it is difficult to use the common hole in the mechanism, and Recently, the push button device is often separated from the mechanism and installed on the cabinet side because it is difficult to locate the push button group exposed on the front of the panel.

FIG. 1 is a cross-sectional view of such a conventional push button device, showing its return state, and FIG. 2 showing its pressed state. In both figures, a push button 1 is rotatably supported by a shaft 3 fixed to a cabinet 2, and is biased by a spring 4 in the direction of arrow A (pushing direction) in the figures. Reference numeral 5 denotes an operating lever for performing mechanism operations for various operation modes, and a mechanism base 6
It is slidably attached to the top and is biased by a spring 7 in the direction in which the push button returns (downward in the figure).

Therefore, the push button 1 is urged in the direction of arrow B by the operating rod 5 and in the direction of arrow A by the spring 4 as described above, but the push button 1 is urged in the direction of arrow A by the spring 4.
Since the spring action of is much greater than that of spring 4, push button 1 is biased in the direction of arrow B when both springs are actuated.

In the return position shown in FIG.
As a result, the push button 1 is urged in the direction of arrow B against the spring 4, and comes to rest while being pressed against the mechanism side via the operating rod 5.

In addition, in FIG. 2, since the operating rod 5 is locked by a chain plate (not shown) in the pushing position, the downward force exerted by the spring 7 in the figure is eliminated, and therefore The auxiliary force in the direction of arrow B for pushbutton 1 disappears,
It is biased in the direction of arrow A by a spring 4 and remains pressed against the mechanism side via an operating rod 5.

However, in the conventional push button device described above, the force of the spring 4 is much smaller than the force of the spring 7 as described above, and its elastic deformation is minimal in the pressed state. The force applied by the spring 4 is also minimal, and the force of the spring 7 is so weak that the push button can be easily pressed with a finger. The push button can be easily moved with a finger in the direction of arrow B from the push position shown in Figure 2, and in the case of portable tape recorders, the push button can be swung even by a slight external impact force. There was a drawback. Furthermore, as described above, the return position of the push button is determined by the return position of the mechanism, so that the push buttons 1 may become misaligned, resulting in deterioration of the appearance.

The present invention was devised in view of the drawbacks of the conventional push button devices for tape recorders, etc., as described above, and is designed to hold the push button in the pressed position with a constant holding force in the pressed state, and then return it to the pressed position. It is an object of the present invention to provide a push button device in which the return positions of a plurality of push buttons are aligned under certain conditions.

This invention creates a gap in a part of the pushbutton,
An elastic piece made of an elastic material such as resin is attached to this part and rotates integrally with the push button, and when the push button is pressed, one end of the operating rod comes into contact with this elastic piece, giving elastic deformation to the elastic piece. The shape and installation direction of the bullet-resistant piece are selected so that the force based on the elastic deformation urges the push button in the pushing direction, and the push button is pushed in the return direction between the cabinet and the push button. The above objective is achieved by loading a spring that acts as a spring.

Embodiments of the present invention will be described below based on the drawings. Note that the same parts as in the above conventional example are given the same reference numerals, and detailed explanation thereof will be omitted. FIG. 3 is a sectional view showing an example of the embodiment of the present invention, and shows the push button in its returned state. In the figure, a push button 1 is rotatably supported by a fixed shaft 3, and a spring 4 is loaded between the push button 1 and the cabinet 2 to bias the push button in the direction of arrow B (return direction). There is. Further, one end of the push button 1 abuts against the cabinet 2 at the return position. A cushioning material 8 made of an elastic material such as rubber is provided. When the push button 1 is in the return position, the spring 4
The push button 1 is urged in the direction of the arrow B by the force , so that one end of the push button 1 is pressed against the cushioning material 8 . Therefore, there is no possibility that the return positions will be uneven between the push buttons, and at the same time, the return impact is alleviated by the elasticity of the cushioning material 8.

Further, the push button 1 is provided with a gap 1a (see FIG. 5), and an elastic piece 9 consisting of a cylindrical portion and two legs is fitted into the gap 1a. FIG. 4 is a diagram showing the shape of the elastic piece 9, and FIG. 5 is a diagram showing the state in which the elastic piece 9 is attached to the push button 1. In both figures and FIG. 3, the elastic piece 9 is molded from an elastic resin material such as polyacetal resin. The inner periphery of the cylindrical portion 9a of the elastic piece 9 is rotatably fitted to the outer periphery of the fixed shaft 3, and one leg 9b thereof
is inserted and fixed between the inner surface of the push button 1 and a locking pawl 10 fixed to the push button, so that the elastic piece 9 rotates around the fixed shaft 3 integrally with the push button 1.

One end of the operating rod 5 is inserted between one leg 9b and the other leg 9c of the elastic piece 9, and the end of the operating rod 5 is connected to the push button 1 when the push button 1 is in the returned state (FIG. 3). Neither the elastic piece 9 nor the elastic piece 9 are in contact with each other. However, when the push button 1 is in the pressed state shown in FIG. Elastic piece 9
The legs 9b and 9c are elastically deformed in the direction of spreading them apart. The elastic deformation given to the elastic piece 9 described above generates a force that urges the push button 1 in the direction of arrow A (pushing direction), and this force acts against the urging force of the spring 4 in the direction of arrow B. In other words, since the push button 1 is strongly pressed in the direction of the arrow A, when the push button 1 is pressed, the push button 1 does not move by a light touch with a finger or swing due to external vibrations or the like.

Although the above embodiments mainly describe a push button device for a tape recorder, it goes without saying that the present invention can be effectively implemented in push button devices other than tape recorders having a plurality of push buttons.

Further, in the embodiments described above, the cushioning material 8 was provided in the cabinet 2, but this cushioning material 8 is not necessarily necessary, and even when one end of the pushbutton comes into direct contact with a member of the cabinet 2, the pushbutton is The return positions are aligned and the present invention can be effectively implemented.

Since the present invention is configured as described above, when the push button is rotated, the push button and the operating rod are integrally connected by the pressing force of the elastic piece, so there is no backlash of the push button in the operating state, and , it does not swing easily even when touched, and on the other hand, when the push button is not operated, the position of the push button is not regulated by the return position of the operating rod, and is pressed by the spring. This has the advantage that there is no variation in the return position.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional push button device in its return state, FIG. 2 is a sectional view showing its pressed state, and FIG. 3 is a sectional view showing an example of the push button device according to the present invention in its return state. FIG. 4 is a diagram showing the shape of the elastic piece, FIG. 5 is a diagram showing how it is attached, and FIG. 6 is a sectional view showing the push button device according to the present invention in a pressed state. 1...Push button, 2...Cabinet,
3...Axis, 4...Spring, 5...Operation rod, 7
... Spring, 8 ... Cushioning material, 9 ... Elastic piece.

Claims (1)

[Scope of utility model registration request] It has a rotatable push button, an operating rod that operates in conjunction with the rotating operation of the push button, and two legs that rotate integrally with the push button. It is composed of an elastic piece having a substantially U-shaped cross section and a spring that urges the push button in the return direction, and when the push button is rotated, both legs of the elastic piece are elastically displaced. By pressing the respective ends of the push button and the operating rod, the push button is held in the rotation operation position via the elastic piece, and when the push button is not rotated, both legs of the elastic piece are elastic. The push button device is configured such that the push button is pressed and held at the return position by the spring without being displaced.