JPH0436010Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a delayed return pushbutton switch used in a hold pushbutton switch of a telephone or the like.

(Prior Art) Conventionally, as a delayed return mechanism for the slider of a delayed return type pushbutton switch, a bullet is attached to a part of an interlocking plate that interlocks with the pushbutton switches installed in parallel.
It is known that an actuating piece provided on a part of the slider comes into sliding contact with the bullet strip, and a ``lock push lever release mechanism for an interlocking lock push button switch'' was announced in Utility Model Publication No. 123144/1983. ing.

To outline this technique with reference to FIG. 14, an actuating piece c is provided protrudingly from a slider b of a delayed return type push button switch a, and a vertically long bullet strip having a horizontal V-shaped inclined surface body d is provided on an interlocking plate f. When the slider b is operated, its actuating piece c contacts and slides on the inclined surface body d of the bullet e, thereby imparting a cam operating effect to the interlocking plate f.

(Problems to be solved by the invention) The conventional delayed return type push button switch has an actuation piece protruding from the slider and a bullet suspended from the interlocking plate engaged with each other as described above. However, the following problems remained latent.

a. Hanging the bullets on the interlocking plate requires fitting and hammering, which is time consuming and tends to cause looseness in the hanging.
Furthermore, even if it were to be fastened with rivets, it would not be easy because the interlocking plates and bullets are small.

b The actuating piece protruding from the slider is formed integrally with the slider, so there are problems with quality maintenance such as breakage.

c. Since the bullets were suspended from the interlocking plate, it was a hindrance to the request to downsize the push button switch.

The present invention was created in view of these problems, and its purpose is to solve the problems of the conventional technology, and to have a simple structure, a small number of parts, easy assembly, and low cost. An object of the present invention is to provide a delay return type push button switch that can be manufactured.

(Means for solving the problem) In order to achieve the above object, the delayed return pushbutton switch of the present invention has an interlocking relationship between the pushbutton switches installed in parallel and the interlocking plate that constitutes the locking mechanism. A certain delayed return type push button switch has a spring piece formed with an oblique side part on one side of the rising part and a side part formed on this one side, and a spring piece provided on the interlocking plate that is always biased in one direction. the spring piece is movable in a direction perpendicular to the moving direction of the slider in a recess provided in a portion of the slider of the delayed return type push button switch corresponding to the interlocking plate; The engaging protrusion of the interlocking plate faces the rising part of the spring piece, and the engaging protrusion slides into contact with the rising part of the spring piece during the pushing stroke, and the engaging protrusion faces the rising part of the spring piece during the return stroke. It is characterized in that the mating protrusion comes into sliding contact with the side surface of the spring piece.

(Function) This delayed return type pushbutton switch is a delayed return type pushbutton switch that is interlocked with the pushbutton switches installed in parallel through the interlocking plate that constitutes the locking mechanism. The spring piece has an oblique side formed on the side and a side face on one side of the spring piece, and an engaging protrusion provided on the interlocking plate that is always biased in one direction, and the delay The spring piece is arranged movably in a direction perpendicular to the moving direction of the slider in a recess provided in a portion of the slider of the return type push button switch that corresponds to the interlocking plate, and Since the portion faces the rising portion of the spring piece, during the pushing stroke of the slider, the engaging protrusion comes into sliding contact with the rising portion of the spring piece, and during the return stroke, the engaging protrusion comes into contact with the side surface of the spring piece. sliding contact with the part.
In this way a camming effect is produced on the interlocking plate.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a delayed return pushbutton switch (HK type pushbutton switch), and 2 is a plurality of pushbutton switches (LK type pushbutton switches), and these switches are made of metal with a U-shaped cross section, for example. They are fixed in parallel on the frame 3, and inside the frame 3, the slider is locked when the push button switch 2 is pressed, and the lock is released when the delayed return type push button switch 1 is pressed. A rod-shaped interlocking plate 4 is biased in one direction and is slidably disposed. The basic structure of the pushbutton switches 1 and 2 as a switch is conventionally known and has not changed in any way; for example, a plurality of fixed contacts are buried in a board, a lid is placed on the board, and the switch casing is constructed. It consists of a slider with a clip-shaped movable contact mounted inside the housing, and as the slider moves, the movable contact slides over the fixed contact to perform switching connection. The slider of the push button switch 2 is locked by a combination of an engaging portion formed on the slider and an engaging protrusion formed on the interlocking plate 4.

2 to 4 show the slider portion of the delayed return type push button switch, and the slider 5 is formed with a recess 6 for accommodating a spring piece.
A projecting portion 7 for locking the end of the spring piece is formed at one end of the recess 6. Further, an opening 9 is formed in one side wall of the recess 6 so that the engaging protrusion 8 formed on the interlocking plate 4 can enter and exit, and a similar opening is formed in the side wall of the lid 10 constituting the switch housing. Form a section.

FIGS. 5 and 6 show a spring piece 11, which is made by bending an elastic metal material into a substantially U-shape, with the width gradually narrowing toward the tip on one side of the rising part 12. While forming the oblique side part 13, this one side part is lowered to form the side part 14, and the tip of the rising part 12 is bent to form the hook part 15. Note that the hook portion 15 does not necessarily need to be bent. As shown in FIG. 3, one end of this spring piece 11 is locked to the bottom wall of the recess 6, and the other end of the spring piece 11 is locked to the overhanging part 7, and the spring piece 11 is placed horizontally in the recess 6. accommodate. Further, the spring piece 11 is accommodated in the recess 6 such that both ends thereof are located on the push button switch side of the slider 5.

Note that the spring piece 11 is not limited to the U-shape, and as shown in FIG. 7, a curved plate spring may be used and the base thereof may be embedded or inserted into the slider 5 to be fixed.

The relationship between the spring piece 11 and the interlocking plate 4 is as follows.
As shown in the figure, when the push button is at rest (return position), the tip of the engagement protrusion 8 of the interlocking plate 4 abuts against the rising portion 12 of the spring piece 11, or there is a slight gap. They are made to face each other.

Here, the spring piece 11 that moves together with the slider 5 and the engagement protrusion of the interlocking plate 4 that is biased in one direction (the direction approaching the spring piece 11) perpendicular to the moving direction of this spring piece 11 and slides into contact with the spring piece 11 8 to 10. First, in the rest position (point a), the spring piece 11 is in a state where both ends are open, and the spring piece 11 and the interlocking plate 4 are in a state where both ends are open.
The engagement protrusion 8 has a relationship as shown in FIG. 3 described above. In the process of pushing the push button switch, the engagement protrusion 8 is stopped, but the spring piece 11
moves, so the tip of the engagement protrusion 8 touches the spring piece 11.
The spring piece 11, which has an open tip, slides against the rising portion 12 of the spring 11, and the rising portion 12 of the spring piece 11 is compressed (point b). Near the end of the pushing stroke, the rising portion 12 of the spring piece 11 remains pressed by the engaging protrusion 8 (point c),
Furthermore, at the end of the pushing stroke, the tip of the engagement protrusion 8 comes off from the rising part 12 of the spring piece 11, and the spring piece 11 rebounds due to its elastic force, opening both ends, and at the same time, the side surface of the engagement protrusion 8 opens. It comes into contact with the side surface 14 of the spring piece 11 (point d). Next, when the press of the push button is stopped and the push button is returned to its original position, the return stroke begins. At this time, the spring piece 11
remains open, and the spring piece 11 moves in the opposite direction to the pushing stroke, so the side surface of the engagement protrusion 8 relatively slides on the side surface 14 of the spring piece 11, and the engagement protrusion 8 is biased in one direction, but resists this force and moves by a length l in a direction perpendicular to the direction in which the spring piece 11 moves (point e). Since this engaging protrusion 8 is provided integrally with the interlocking plate 4, it will similarly move by the length l at this time. Furthermore, at the end of the return stroke, the side surface of the engagement protrusion 8 slides at the same height on the side surface of the spring piece 11 whose height becomes relatively gradually lower, so that the engagement protrusion 8 remains at a certain position. 8 is disengaged from the side surface 14 of the spring piece 11 (point f), and since the engaging protrusion 8 is always biased in one direction, it returns to its initial position (point a).

What should be noted here is the trajectory (in a straight line) of one end of the engagement protrusion 8 during the pushing stroke, as shown in FIG. Or more specifically, spring piece 1
The A-A line, which is the locus of one end of the distal end of the engaging protrusion 8 that actually contacts the rising portion 12 of the spring piece 1,
It must be within the range of the oblique side part 13 and side part 14 of 1. If such a relationship does not exist, the engaging protrusion 8 will not be able to come into contact with the side surface 14 of the spring piece 11, and the interlocking plate 4 will not be able to move.

Further, as shown in FIG. 10, the engaging protrusion 8
In order to be able to return to the initial state at the end of the return stroke, the locus of the height of the tip of the spring piece 11 or, more specifically, the line B-B, which is the locus of the tip of the side abutting portion, is the spring piece 11 near the end of the return stroke. It must be located outside of the rising portion 12 of the

The relationship between the operations of the delayed return type pushbutton switch 1 having the above structure and the pushbutton switch 2 disposed in parallel thereto will be explained with reference to FIGS. 11 to 13. In each figure, A and B represent a push button switch 2, and C represents a delayed return type push button switch 1. The push button switch 2 has an engaging portion 5 on the side of its slider 5'.
A is provided, and an engaging protrusion 8' provided on the interlocking plate 4 corresponds to this engaging portion 5a.

First, as shown in FIG. 11, it is assumed that the pushbutton switch 2 shown in A is locked and the pushbutton switch 1 shown in C is in the initial state (point a). Next, as shown in Fig. 12, push button switch 1 shown in
When pushed in (point d), the engagement protrusion 8 of the pushbutton switch 1 is located at the tip of the side surface 14 of the spring piece 11, so the interlocking plate 4 does not move yet and the pushbutton switch 2 shown in A is in the locked state. It remains as it is. As shown in FIG. 13, in the return stroke (point e) of the push button switch 1 (c), the engagement protrusion 8 moves by a certain length l, and the engagement protrusion 8 and the engagement protrusion 8' Since they are provided at regular intervals on the interlocking plate 4, the engagement protrusions 8'
When the push button switch 2 is moved by l, the engagement protrusion 8' and the engagement part 5a of the slider 5' are disengaged, and both the push button switches 1 and 2 return to their original positions.

(Effects of the invention) As described above, the delayed return type push button switch of the present invention has an oblique part formed on one side of the rising part, and a spring piece with a side part formed on this one side attached to the slider. Since the structure is such that the spring piece is accommodated and the engaging protrusion of the interlocking plate is related to the spring piece, the structure of the switch and the interlocking plate is simplified, and the number of parts is small, making assembly easy and improving productivity. The entire push button switch is made smaller,
The product can be provided at low cost.

[Brief explanation of the drawing]

Figures 1 to 6 are diagrams of the embodiment, with Figure 1 being a plan view of the switch, Figure 2 being a plan view of the slider section, Figure 3 being a vertical cross-sectional view, and Figure 4 being a cross-sectional view. 5 is a plan view of the spring piece, FIG. 6 is a side view, FIG. 7 is a partial sectional view of a switch according to another embodiment, and FIGS. 8 to 13 are explanatory diagrams of the operation. , FIG. 14 is an explanatory diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Delayed return type push button switch, 2... Push button switch, 4... Interlocking plate, 5... Slider, 6... Recess, 8... Engaging protrusion, 11... Spring piece, 12... Rising part, 13... Hypotenuse part, 1
4... Side part.

Claims (1)

[Scope of utility model registration request] In the delayed return type push button switch 1 which is interlocked with the push button switches 2 arranged in parallel and through the interlocking plate 4 constituting the lock mechanism, an oblique side portion 13 is formed on one side of the rising portion 12, and Spring piece 1 having a side surface 14 formed on one side thereof
1, and an engagement protrusion 8 provided on the front and rear interlocking plate 4 which is always biased in one direction, and the engagement protrusion 8 is provided on the slider 5 of the delayed return type push button switch 1 at a portion corresponding to the interlocking plate 4. The spring piece 11 is inserted into the recess 6.
are disposed movably in a direction perpendicular to the moving direction of the slider 5, and the engagement protrusion 8 of the interlocking plate 4
faces onto the rising portion 12 of the spring piece 11, and during the pushing stroke, the engaging protrusion 8 faces the spring piece 1.
1, and in the return stroke, the engaging protrusion 8 comes into sliding contact with the side surface 14 of the spring piece 11.