JP3778627B2 - Push button switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pushbutton switch used for a call operation in a door calling device or the like.
[0002]
[Prior art]
For example, as a push button switch used for a call operation in an entrance call device or the like, the one shown in FIG. 6 has been proposed. This was filed by the inventors of the present invention in order to improve the feel of the push operation of the push button handle and the contact stability of the contact spring of the conventional push button switch, and is disclosed as Japanese Patent Application No. 08-037834. ing.
[0003]
The push button switch 1 is fixedly disposed so that the push operation portion 3a is exposed from an opening window 2a provided in the cover body 2 so as to be a fulcrum when one end of the thin plate tongue piece 3b is pushed on the cover body 2. When the push button handle 3 and the push operation portion 3a are pushed on the back of the push button handle 3, the leaf spring 4e provided on the base 4 is pushed and the disc spring 3i is pushed and reversed by the urging force of the leaf spring 4e. This is provided with a disc spring mechanism 5 having a pressing piece 3h that provides a click feeling.
[0004]
The push button handle 3 has a shape in which a thin plate tongue piece 3b is extended to the push operation portion 3a, and the thin plate tongue piece 3b is formed to have substantially the same width as the push operation portion 3a. And after inserting the protrusion 2c which protruded in the inner surface 2b of the cover body 2 in the hole 3c so that the end of the pushbutton handle 3, ie, the front-end | tip of the thin-plate tongue piece 3b, may become a fulcrum in the pushing operation of the pushing operation part 3a, The portions are heat-welded and fixed to the cover body 2. As shown in FIG. 6C, the inner surface 2b of the cover body 2 is formed to be curved toward the opening window 2a. And since the thin tongue piece 3b is attached along this curved surface, when the pushing operation of the pushing operation part 3a is cancelled | released, sufficient elastic restoring force is given and the pushing operation part 3a which is a free end is original. Immediately return to the position before the push operation.
[0005]
The disc spring mechanism 5 provided on the back surface of the push button handle 3 is provided to reverse the disc spring 3i to obtain a click feeling when the push operation portion 3a is pushed, and is provided on the back surface of the push button handle 3. A pair of drive pieces 3f are integrally projected on the plate-like body 3e fixed to the projection 3d, and a pressing piece 3h is projected on the gap between the plate-like body 3e and the back surface of the push button handle 3. A bowl-shaped body 3g is inserted, and the back surface of the pressing piece 3h of the bowl-shaped body 3g is in contact with a disc spring 3i disposed on the back surface of the push button handle 3. When the push operation portion 3a of the push button handle 3 is pushed, the pressing piece 3h of the hook-like body 3g presses the leaf spring 4e provided on the base and the back surface of the pushing piece 3h by the urging force of the leaf spring 4e. Is configured such that a good click feeling can be obtained by pressing and reversing the disc spring 3i and the disc spring 3i being recessed. The disc spring 3i instantaneously returns to the original state when not pressed.
[0006]
The base 4 is provided with a pair of connection terminals 4a and 4a into which terminal screws 4b and 4b are screwed, and a contact 4d is a distal end of a contact spring 4c having a base end fixed to one of the connection terminals 4a. Is provided. The contact spring 4c has a leaf spring 4e that is lifted from the proximal end portion toward the distal end portion, and is punched in the center portion in the longitudinal direction in a U-shape. The other end of the connection terminal 4a is positioned below the contact 4d. Therefore, when the push operation portion 3a of the push button handle 3 is pushed, the lifted portion is pushed by the pair of drive pieces 3f. The contact 4d provided on the contact spring 4c comes into contact with the other end of the connection terminal 4a, and the contact is closed.
[0007]
A locking projection (not shown) is provided on the inner surface of the side wall of the cover body 2, and the locking projection is provided at a corresponding portion of the base 4 by pressing the cover body 2 from above. The base 4 is connected and fixed by fitting into the locking recess.
[0008]
[Problems to be solved by the invention]
By the way, the above-mentioned push button switch 1 has a good touch feeling and contact stability of the push button handle. However, when the finger is released from the push operation part 3a after the push operation or the push operation, the sound when the disc spring 3i is reversed is loud, which makes the person operating the push button switch uncomfortable. there were. In some cases, the stability of the contact of the pushbutton switch contact may be anxious.
[0009]
The present invention has been made in view of the above-described reasons, and an object thereof is to provide a pushbutton switch that provides a good click feeling when operating a push operation unit and does not generate an unpleasant operation sound. It is in.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the push button switch according to claim 1 is fixed so that the push operation portion is exposed from an opening window provided in the cover body so as to be a fulcrum when one end is pushed on the cover body. The push button handle provided and the leaf spring provided on the base when the push operation portion is pushed on the back of the push button handle are pressed, and the disc spring is pressed and reversed by the urging force of the leaf spring to thereby provide a click feeling. In the pushbutton switch provided with a disc spring mechanism having a pressing piece to be obtained, in the disc spring mechanism, the disc spring has a contact surface that displaces and abuts the mounting surface for supporting the periphery of the disc spring and the curved surface of the inverted disc spring. The disc spring is housed in a disc spring storage section having two contact surfaces, and the step size between the mounting surface and the abutting surface is the same as that of the pressing piece. set so as to be sandwiched between the contact surface, the dish Click feeling is no way obtained by inverting operation of the root. Thereby, the fine vibration at the time of reversal of a disc spring will decrease.
[0011]
According to a second aspect of the present invention, in the push button switch according to the first aspect, the disc spring according to the first aspect is accommodated in a disc spring accommodating portion formed by two surfaces of a mounting surface for supporting a peripheral edge and the contact surface. It is said. As a result, less air is discharged from the periphery when the disc spring is reversed.
[0012]
According to a third aspect of the present invention, there is provided the push button switch according to the first or second aspect, further comprising an elastic body between the disc spring and the abutting surface that absorbs a collision sound that the disc spring collides with the abutting surface during the pressing operation. Yes. As a result, the disc spring is reversed when the push operation portion is pushed, and is sandwiched between the pressing piece and the contact surface via the elastic body.
[0013]
In the push button switch according to claim 4, the elastic body according to claim 3 is attached to a surface facing the contact surface of the disc spring. Thereby, at the time of the punching process of the disc spring, the punching material to which the sheet material is stuck by the elastic body material can be punched and formed by the die.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the first embodiment of the pushbutton switch of the present invention is based on FIGS. 1 to 3, the second embodiment is based on FIG. 4, and the third embodiment is based on FIG. explain. In addition, the same code | symbol is attached | subjected about the same member as the thing of a prior art example.
[0015]
[First Embodiment]
FIG. 1 is an exploded perspective view of a cover body and a push button handle of the push button switch according to the first embodiment. 2A and 2B are enlarged cross-sectional views of a disc spring mechanism that is a main part of the push button switch shown in FIG. 1, in which FIG. 2A shows a normal state and FIG. FIG. 3 is an enlarged cross-sectional view of a conventional disc spring mechanism for comparison, in which (a) is a normal state and (b) is a pushing operation state.
[0016]
This push button switch 1 also includes a cover body 2, a push button handle 3, a base 4, and a disc spring mechanism 5 having substantially the same functions as the conventional example.
[0017]
This disc spring mechanism 5 has an abutment surface 3j as shown in FIG. In detail, the disc spring 3i of this thing is accommodated in the disc spring accommodating part 5a which is the gap part of the same plate-shaped body 3e and the back surface of the pushbutton handle 3 as the thing of a prior art example, The curved surface of the inverted disc spring 3i is displaced and contacted, and the mounting surface 3k for supporting the peripheral edge of the disc spring 3i is formed. The step size between the mounting surface 3k and the contact surface 3j is, for example, a plate spring 3i having a plate thickness of 0.08 mm, a diameter of 12 mm, and a curved surface height of 0.4 mm before loading. , Approximately 0.2 mm.
[0018]
According to this, as shown in FIG. 2 (b), the disc spring 3i is inverted when the push operation portion 3a is pushed, and the curved surface of the disc spring 3i is displaced. By being held between the contact surfaces 3j, the fine vibration when the disc spring 3i is reversed is reduced. As a result, as compared with the conventional example shown in FIG. 3, the click spring 3i is reversed so that a good click feeling is obtained and no unpleasant operation sound is generated.
[0019]
[Second Embodiment]
FIG. 4 is an enlarged cross-sectional view of a disc spring mechanism, which is a main part of the push button switch according to the second embodiment. FIG. 4A is a normal state, and FIG. 4B is a push operation state.
[0020]
This is different from the first embodiment only in the configuration of the disc spring accommodating portion 5a.
[0021]
That is, the disc spring accommodating portion 5a is formed by two surfaces, a placement surface 3k for supporting the peripheral edge of the disc spring 3i and the contact surface 3j. And the amount of air interposed between the disc spring 3i and the opposing surface of the disc spring 3i is small.
[0022]
According to this, as shown in FIG. 3 (b), the disc spring 3i is reversed when the push operation portion 3a is pushed, and the amount of air compressed at that time is the amount of air compressed in the first embodiment. When the disc spring 3i is reversed, the amount of air discharged from the peripheral edge is reduced, and the fine vibration of the disc spring 3i is further reduced.
[0023]
[Third Embodiment]
FIG. 5 is an enlarged cross-sectional view of a disc spring mechanism that is a main part of the pushbutton switch according to the third embodiment. FIG. 5A is a normal state, and FIG. 5B is a push operation state.
[0024]
This is different from the first embodiment only in the configuration of the disc spring mechanism 5.
In other words, the disc spring mechanism 5 of this device has an elastic body 3m between the disc spring 3i and the abutting surface 3j, which absorbs a collision sound in which the disc spring collides with the abutting surface during a pressing operation. The elastic body 3m is formed of, for example, a polyethylene film material having an adhesive applied to the back surface, and is adhered to a surface facing the contact surface 3j of the disc spring 3i. Further, in this case, the step size between the mounting surface 3k and the contact surface 3j is, for example, a plate thickness size of 0.08 mm, a diameter size of 12 mm, and a curved surface height before loading of 0.4 mm of this embodiment. In the disc spring 3i, it is set to about 0.3 mm.
[0025]
According to this, by having the elastic body 3m having a thickness dimension of about 0.1 mm, the disc spring 3i is reversed when the push operation portion 3a is pushed as shown in FIG. 5 (b). The fine vibration of the disc spring 3i is further reduced by being sandwiched between the pressing piece 3h and the contact surface 3j via the elastic body 3m. In the configuration in which the elastic body 3m is adhered to the surface facing the contact surface 3j of the disc spring 3i, when the disc spring 3i is punched, it is substantially the same as the punching material of the disc spring 3i in advance. It is possible to stick a sheet material made of an elastic material having the outer dimensions of the above-described outer dimensions, and to punch and mold the stamping material to which the sheet material is stuck using a mold. As a result, it is possible to avoid an increase in cost due to the addition of the work of adhering to the elastic body 3m in the assembly process of the disc spring mechanism 5 and an increase in the assembly work time, and to suppress the increase in cost due to the addition of the elastic body 3m. be able to.
[0026]
In the above description of the third embodiment, the elastic body is exemplified by being attached to the surface facing the contact surface of the disc spring. However, the present invention is limited only to the elastic body. For example, an elastic body may be attached to the contact surface.
[0027]
【The invention's effect】
The push button switch according to the first aspect of the invention reduces fine vibrations when the disc spring is reversed, so that a good click feeling can be obtained by the inversion of the disc spring and no unpleasant operation sound is generated.
[0028]
In addition to the effect of the first aspect, the push button switch according to the second aspect reduces the amount of air discharged from the peripheral edge when the disc spring is reversed, so that the slight vibration of the disc spring is further reduced.
[0029]
Further, in the push button switch according to claim 3, in addition to the effect of claim 1 or 2, the disk spring is reversed when the push operation portion is pushed, and an elastic body is interposed between the press piece and the contact surface. Therefore, the slight vibration of the disc spring is further reduced.
[0030]
According to a fourth aspect of the present invention, in addition to the effects of the third aspect, the pushbutton switch is used to punch out the punching material to which the sheet material is stuck by the elastic material by the die when punching the disc spring. Since it becomes what can be shape | molded, the cost increase accompanying the addition of an elastic body can be suppressed low.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a cover body and a push button handle of a push button switch according to a first embodiment of the present invention.
FIGS. 2A and 2B are enlarged cross-sectional views of a disc spring mechanism, which is a main part of the push button switch shown in FIG. 1, in which FIG.
FIGS. 3A and 3B are enlarged sectional views of a conventional disc spring mechanism, in which FIG. 3A shows a normal state and FIG. 3B shows a push operation state;
4A and 4B are enlarged cross-sectional views of a disc spring mechanism that is a main part of a push button switch according to a second embodiment, in which FIG. 4A is a normal state and FIG. 4B is a push operation state.
FIGS. 5A and 5B are enlarged cross-sectional views of a disc spring mechanism that is a main part of a push button switch according to a third embodiment, in which FIG. 5A shows a normal state and FIG. 5B shows a push operation state;
6A and 6B are diagrams illustrating a pushbutton switch, in which FIG. 6A is a front view, FIG. 6B is a front view with a cover body removed, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pushbutton switch 2 Cover body 2a Opening window 3 Pushbutton handle 3a Pushing operation part 3h Pushing piece 3i Disc spring 3j Contact surface 3k Placement surface 3m Elastic body 4e Leaf spring 5 Disc spring mechanism

Claims (4)

A push button handle fixedly disposed so as to be a fulcrum when one end is pushed to the cover body so that the push operation section is exposed from an opening window provided in the cover body, and a push operation section on the back of the push button handle In a pushbutton switch provided with a disc spring mechanism having a pressing piece that presses and reverses the disc spring by the urging force of the plate spring and obtains a click feeling by pressing the leaf spring provided on the base when the button is pressed.
In the Belleville spring mechanism, the Belleville spring is housed in a Belleville spring storage section having two surfaces: a placement surface for supporting the peripheral edge thereof and a contact surface on which the curved surface of the reversed Belleville spring is displaced and abuts. The step size between the mounting surface and the contact surface is set so that the disc spring whose peripheral edge is supported by the same mounting surface during the pressing operation is sandwiched between the pressing piece and the contact surface , A push button switch characterized in that a click feeling can be obtained by the reversing operation of the disc spring . 2. The pushbutton switch according to claim 1, wherein the disc spring is housed in a disc spring housing portion formed by two surfaces of a mounting surface for supporting a peripheral edge and the contact surface. The pushbutton switch according to claim 1 or 2, further comprising an elastic body between the disc spring and the abutment surface that absorbs an impact sound that the disc spring collides with the abutment surface during a pressing operation. 4. The pushbutton switch according to claim 3, wherein the elastic body is attached to a surface facing the contact surface of the disc spring.

Images