JPH01231227A - Pushbutton switch - Google Patents

Abstract

PURPOSE:To make the pushbutton switch of push-lock and turn-reset type compact and lightweight, and reduce the manufacture cost thereof by constituting the switch with a cylindrical fixing member and a plastic member having elasticity. CONSTITUTION:The pushbutton switch in the title comprises a cylindrical fixing member 11 and a plastic member having elasticity as a whole. When an operation button 5 in a reset state is pressed, the tip of the spring part 5 thereof is displaced together with a movable member 2, while being displaced sliding on a restraining plane 6. After passing a stepped part 8, the tip of the spring part 5 is released in a space 7 and projected outside, thereby locking the button 3. The movable member 2 in this state, when the operation button 3 is turned to a reset direction by the predetermined angle, comes to be freed from hindrance by the stepped part 8 and returns to the rest state via a reset passage 9 formed on the fixing member 1 with the restoring force of a spring 4. According to the aforesaid construction, it is possible to reduce the quantity of parts and make the switch compact and lightweight.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a pushbutton switch, and more specifically, when the operation button is pushed in, it is locked, and when it is rotated in a predetermined direction from the locked state, it is unlocked and operated. This invention relates to a so-called button lock/turn resent type pushbutton switch in which the button returns.

<Prior art> This type of conventional pushbutton switch has a rectangular housing at the rear of the operating section, and the four corners of the housing are used to arrange a stopper, etc., and the shaft is integrated with the pushbutton. A cylindrical cam or the like is provided at the rear of the movable part that is displaced in the direction and the circumferential direction, and the functions of the bush lock and the turn recessor 1- are controlled by engaging the cylindrical cam or the like with the above-mentioned stopper or the like. (For example, JP-A-54-139276, JP-A-54-124281) <Problem to be solved by the invention> According to such prior art, since it has a rectangular housing, it is difficult to attach it to a panel. The occupied area and the depth required behind the pallet are large, requiring a large occupying volume.
Furthermore, there is a drawback that the number of parts such as a cam, a stopper, and a spring that presses the stopper is large, and the number of assembly steps is also increased.

The present invention has been made in order to eliminate the above-mentioned drawbacks all at once, and to dramatically advance the reduction in size and weight and manufacturing cost.

<Means for Solving the Problems> The configuration of the present invention will be described with reference to drawings of embodiments.

The pushbutton switch of the present invention includes a fixed member 1 having a generally cylindrical shape, and a movable member 2 having a generally cylindrical shape, which is made of elastic plastic and is fitted inside the fixed member and slidably displaced in the axial direction. , an operation button 3 provided at the front end of the movable member 2, the fixed member 1 and the movable member 2.
A spring 4 is attached between the movable member and presses the movable member forward while pushing the movable member in the opposite direction to the reset direction. a spring part 5 formed such that its free end protrudes outward in a natural state; a ring member 20 having a ring shape that covers the rear end surface of the spring part 5 and fixed to the movable member 2; a restraining surface 6 which is a structure formed on the fixed member 1 and which restrains the spring portion 5 from protruding outward when the operation button 3 and the movable member 2 are in a first state in which they are in their returned positions; A space portion 7 that releases the inhibition when the operation box 3 and the movable member 2 are in the pushed-in second state.
When the operating button 3 and the movable member 2 are rotated in the reset direction from the second state, the operating button 3 and the movable member 2 are rotated by the restoring force of the spring 4. The spring part side consisting of the reset passage 9 of the spring part 5 for not returning the member 2 to the above-mentioned first state? ff
It is characterized by having a 1l structure.

Effect> In the return state, the operation button 3 and the movable member 2 are in the front due to the force of the spring 4, and at that time, the movable member 2
The tip of the spring portion 5 integrally formed with the fixing member 1 is in contact with the restraining surface 6 of the fixing member 1. When the operation button 3 is pushed in from this return state, the tip of the spring portion 5 is displaced along with the movable member 2 while sliding on the restraining surface, and when it passes the stepped portion 8, it is released into the space 7 and springs. The tip of the part protrudes outward.

In this state, since the stepped portion 8 exists, the movable member 2 cannot return forward and is locked in the pushed-in state.

In this second 4&G, the movable member is allowed to rotate in the circumferential direction, and when the operation button is rotated by a predetermined angle in the reset direction, the step barrier disappears, and the reset button formed on the fixed member disappears. The movable member moves forward through the passage 9 due to the restoring force of the spring 4, and then rotates in the opposite direction to the reset direction due to the restoring force of the spring 4 in the circumferential direction and returns to the restoring state.

<Example> Fig. 1 shows a sleeping area (cross section BB in Fig. 2) in the restored state (first state) of the embodiment of the present invention, and Fig. 2 shows a cross section taken along A-A in Fig. 1. A cross-sectional view is shown.

The fixing member 1 has a cylindrical shape as a whole, and has a stepped portion 10 for attaching to a circular hole in a panel from the front, a male attachment screw 11 at the rear thereof, and a rear end portion for connecting a switch portion 12. Cuts 13...13 are formed. The movable member 2 fitted inside the fixed member 1 is made of an elastic plastic material, and has a cylindrical shape with a cavity 14 in the center in which a light source for illumination can be provided if necessary. , an operation box 3 is fitted to its front end. Shoulder 15 formed on the inner surface of fixed member 1 and movable member 2
A spring (hinging spring) 4 is provided between shoulders 16 formed on the outer surface of the spring 4, and both ends of the spring 4 are fitted into recesses in the scrap 15 and the shoulder 16 and fixed.

Movable portions (two portions 5, 5 are provided at the second rear end portion symmetrically with respect to the axis). The spring portion 5 has an arcuate rod shape whose base portion is integrally formed with the flexible/auxiliary member 2 and whose tip is a free end, and has a protruding portion 17 that slightly protrudes outward. When no restraining force is applied, the protrusion 17 is formed to protrude outward as shown by the solid line in FIG.

A ring member 20 is integrally fixed to the rear end of the movable member 2 . As shown in a perspective view in FIG. 5, this ring member 20 has a ring shape that covers an arcuate spring portion 5.5, and in order to be fixed to the movable member 2, locking portions 21 are provided at two locations on the front surface. A small protrusion 22 is formed on the inner surface of each locking part 21, and a small hole 23.23 into which the small protrusion 22 fits is formed at the rear end of the movable member 2.

This ring member 20 serves to maintain a space for the movable member 2 and the knob portion 5.5 to operate, and also to transmit the movement of the operation button 3 to the switch portion 12. doing.

Also at the rear end of the fixing member 1, the above-mentioned 2
The spring part side for operating the button opening, ri, turn reset function in cooperation with the individual spring parts? A TII structure is formed. In other words, as shown in FIG. 1, there is a restraining surface 6 for restraining the outward protrusion of the spring part 5, especially the distal end protrusion 17, a space 7 continuous to the rear thereof, and a space between the restraining surface 6 and the space. Part 7
A stepped portion 8 is formed between the two. The range in which this restraining surface 6 is formed is indicated by α in FIG. 2, including the rounded portion.

In the example, it is α-140°. Therefore, (180
The restraining surface 6 and the stepped portion 8 are not formed in the 1·n area of °−α), and are continuous with the space 7 that releases the protruding portion 17. The axial groove 18 in the range of (180°-α) constitutes the front half of the reset passage 9. Further, an inclined surface 19 for returning from the front part of the groove 18 to the 1rll stop face 6 constitutes the rear part of the reset passage 9.

Figure 3 shows the first state shown in Figure 1 (lower 1'' part) and the second state (lower half) when the operation button is pressed and locked.
are also shown. FIG. 4 also shows the above-mentioned second state (solid line) and the state of the spring section (double-dashed line) when the operation button is rotated in the seven-fold direction from that state.

<Effects of the Invention> According to the present invention, since the generally cylindrical flexible and auxiliary member is fitted inside the generally cylindrical fixing member,
As before, the illumination light source can be provided at the axial center of the movable member, and in addition, the spring part is integrally formed with the movable member, and the hinge part control structure that engages with the spring part is integrally formed with the fixed member. Therefore, there is no need for any parts to operate the Bunon Yurosok turn reset function, and the entire unit is housed within a cylindrical housing, achieving a dramatic reduction in size and weight.

In addition, a movable part (a ring part made individually at the second rear end)
Since the No. 20 is fixed, not only is it easy to form the circular arc shape ＼ missing part 5.5, but also the movement of the spring part 5.5 is limited to the radial direction 1iil, and the external force in the axial direction is applied to the spring part. is no longer activated, improving the durability and reliability of the spring section.

Furthermore, compared to the front half where the operation buttons etc. are located, the rear half, where the button lock and turn reset FUR are built in, is lighter than before, so the overall center of gravity has been moved forward, and compared to the previous half. Since the rear protrusion like the rear rectangular housing is no longer provided, the pushbutton switch can be mounted from the front of the control panel by providing the stepped portion 10 and mounting pad 11 as shown in the embodiment. This makes it possible to improve the efficiency of the control panel mounting work.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view (BB cross section in Fig. 2) showing the first submersion plate of the embodiment of the present invention, Fig. 2 is a view from A-A 1jJi in Fig. 1, and Fig. 3 is FIG. 4 is a longitudinal cross-sectional view showing the first state (lower half) and the second state (upper half) of the spring of the above embodiment. FIG. FIG. 5 is an exploded perspective view showing the 20th ring part and its surrounding parts in the above embodiment. 1...Fixed member 2...Movable member 3...Operation button 4...Spring 5...Spring part 6...Suppressing surface 7...Space part □ 8...Step part 9 ...Reset passage 20...Ring member patent applicant Izumi Electric Co., Ltd. Agent Patent attorney Nishi 1) Shin

Claims (1)

[Claims] a generally cylindrical fixed member; a generally cylindrical movable member made of elastic plastic that is fitted inside the fixed member and slidably displaced in the axial direction; and a movable member provided at the front end of the movable member. an operation button, a spring installed between the fixed member and the movable member that presses the movable member forward and in the opposite direction to the reset direction; a spring portion having an arcuate rod shape and whose free end protrudes outward in a natural state, and a ring shape that covers the rear end surface of the spring portion and is fixed to the movable member. A ring member and a structure formed on the fixing member,
A deterrent surface that prevents the spring portion from protruding outward when the operating button and the movable member are in a first state in which they have returned; and a deterrent surface that prevents the spring portion from protruding outward when the operating button and the movable member are in a second state in which they are pushed in. and a step formed between the space for releasing the button, and when the operating button and the movable member are rotated in the reset direction from the second state, the operating button and the movable member are rotated by the restoring force of the spring. A pushbutton switch having a spring part control structure comprising a spring part reset path for returning the member to the first state.