JPH0424582Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to improvements in push button switches used in various electronic devices.

"Prior Art" Figure 6 shows a conventional push button switch. The structure of this push button switch will be explained in advance. In the figure, numeral 1 indicates a switch body formed in a box shape from an insulating material.
A common contact 2 is provided at the center of the bottom surface of the switch body 1, and two fixed contacts 3 and 4 are installed symmetrically with the common contact 2 in between. Common contact 2 and fixed contacts 3, 4
are led out from the bottom of the switch body 1 as a common terminal 2A and terminals 3A and 4A.

The central portion of the movable contact piece 5 contacts the common contact 2, and performs seesaw motion using the common contact 2 as a fulcrum. For this purpose, the movable contact piece 5 is attached to a movable contact piece holder 6.
Supported by The movable contact piece holder 6 is made of an insulating material and has a groove 6A in its bottom surface as shown in FIG. 7, and the movable contact piece 5 is accommodated in this groove 6A. The movable contact piece 5 has a protrusion 5A that protrudes outward in the center part.
The protrusion 5A is engaged with a groove 6B provided in the movable contact piece holder 6, so that the movable contact piece 5 does not shift from the fulcrum position of seesaw movement.

On the other hand, on the outside of the movable contact piece holder 6 is a semi-column-shaped shaft 6.
This shaft 6C is inserted into the groove 1C formed between the two protrusions 1A and 1B formed on the inner wall surface of the switch body 1, and the fulcrum position of the movable contact piece holder 6 is held.

The movable contact piece holder 6 has a concave groove 6D on the upper surface side, and the pusher 7 engages with this concave groove 6D. The pusher 7 is supported by a converter 8.

The converter 8 has a shaft 8A protruding from both sides, and this shaft 8A forms a groove 1 in the upper edge of the switch body 1.
It is engaged with D and is rotatably supported. Furthermore, the converter 8 has a chevron-shaped protrusion 8B on the upper part, and this protrusion 8B
The slopes 8C and 8D formed by the above-described slopes form opposite slopes. Engaging portions 8E and 8F are formed at the lower ends of each of the reversely inclined surfaces, and these engaging portions 8E
The tip of the operating pin engages with and 8F to operate the converter 8.

The converter 8 is provided with a sliding guide portion 8G facing downward, and the pusher 7 is inserted into this sliding guide portion 8G. The pusher 7 is elastically biased downward by a spring 11. The movable contact piece holder 6 presses the free end of the movable contact piece 5 against the fixed contact 3 or 4 by the biasing force of the pusher 7.

The upper part of the switch body 1 is covered with a lid 10.
A hole is formed in the center of this lid 10, and a cylindrical body 12 is attached to this hole. The cylinder body 12 has an operating rod 1.
3 is attached so that it can move up and down. A hole 13A is formed from the lower end of the operating rod 13 along the axis, and the operating pin 9 is accommodated in this hole 13A. The operating pin 9 has a flange 9A on the upper end side, and a spring 15 is attached between the flange 9A and a spring receiver 14 attached to the lower end side of the cylindrical body 12, and the operating rod 13 is pulled upward by the spring 15. It biases and elastically supports the operating pin 9. This allows the tip of the operating pin 9 to swing in any direction. A push button 16 is attached to the upper end of the operating rod 13.

With this structure, each time the push button 16 is pressed down, the engaging portions 8E and 8F of the converter 8 are alternately pressed by the tip of the operating pin 9, and the converter 8 is alternately converted in opposite directions. Due to the switching operation of the converter 8, the movable contact piece holder 6 moves in seesaw motion due to the movement of the pusher 7, and the movable contact piece 5 switches from a state in which it is in contact with the contact point 3 to a state in which it is in contact with the contact point 4. . The reverse switching operation is also performed.

``Problem that the invention attempts to solve'' According to the conventional push button switch mentioned above, converter 8
When the converting operation is performed, the tip of the pusher 7 slides inside the groove 6D formed in the movable contact holder 6.
Therefore, the force for pressing down the push button 16 is the sum of the amount of work required to convert the movable contact piece 5 and the movable contact piece holder 6 and the amount of work required for sliding friction resistance between the pusher 7 and the movable contact piece holder 6.

Therefore, the force required to convert the converter 8 becomes relatively large. Further, since the pusher 7 engages with the groove 6A and slides, there is also a drawback that the switching operation does not feel good.

Furthermore, since the engagement between the pusher 7 and the groove 6A is shallow, the engagement is likely to come off during assembly, making it difficult to assemble the push button switch.

``Means for Solving the Problems'' This invention has a structure in which the push tool and the movable contact piece holder are axially coupled.

That is, a bearing part is provided at the upper part of the movable contact piece holder 6, and the pusher is axially coupled to this bearing part. Furthermore,
The pusher is provided with a projecting piece that protrudes downward from the center of the pusher and is located in the groove in the upper center of the movable contact piece holder.

Due to this axial connection, when the converter 8 performs a switching operation, the push tool causes the movable contact piece holder to seesaw through the axial connection.

As a result, since there is no sliding contact between the push button and the movable contact piece holder, the frictional resistance is reduced. Therefore, the present invention provides a push button switch that can be switched with a light operating force, and furthermore, the projecting piece of the pusher is located in the recessed groove, so that the engagement between the pusher and the movable contact piece holder is difficult to disengage, and therefore assembly work is easy. can.

Furthermore, since there are no sliding contact parts, the tactile sensation of operation is improved.

"Embodiment" FIG. 1 shows an embodiment of a push button switch according to this invention. In FIG. 1, parts corresponding to those in FIGS. 6 and 7 are designated by the same reference numerals. In other words, 1 indicates the box-shaped switchbox body. A common contact 2 is implanted in the center of the bottom surface of the switch body 1. Fixed contacts 3 and 4 are provided at positions apart from this common contact 2. The figure shows a case where two fixed contacts 3 and 4 are provided around the common contact 2, but it is not necessarily necessary to provide two fixed contacts 3. For example, if the switch is used only as a power switch, only one of the fixed contacts is used. Sometimes it is.

A central portion of a movable contact piece 5 contacts the common contact point 2, and the movable contact piece 5 is supported by a movable contact piece holder 6 so as to be capable of seesaw movement. Since the structure of this part is the same as the conventional one, explanation of the overlapping part will be omitted.

The feature of this invention is the movable contact holder 6.
Bearing parts 6D, 6D are provided on the upper edge as shown in FIG. 2, and shaft parts 7C, 7D of the push tool 7 shown in FIG. is provided with a protruding piece 7E that protrudes downward from the center portion and is located within the groove 6F of the movable contact piece holder 6,
This is the point where the push tool 7 applies a pressing force toward the movable contact piece holder 6 by means of a spring.

That is, as shown in FIG. 2, two protruding pieces 6E are provided on the upper side of the movable contact piece holder 6, a groove is formed in the protruding piece 6E, and a bearing portion 6D is formed by the groove.

On the other hand, the converter 8 is provided with a sliding guide portion that supports the pusher 7 so that it can slide in the vertical direction. As shown in FIGS. 3 and 4, this sliding guide portion forms a downwardly flat groove 8H in the converter 8, and a pusher 7 as shown in FIG. 5 is slid into this groove 8H. Store freely. The pusher 7 has two prongs 7A and 7B as shown in FIG. 5, and both side edges of the two prongs 7A and 7B are engaged with a sliding guide part 8H formed on the converter 8, so that the sliding Insert into the guide section 8H. Sliding guide part 8H
A circular part 8I for storing the spring 11 is provided in the center of the spring 11, and the spring 11 (see FIG. 1) is attached to this circular part 8I.

Shaft portions 7C and 7D (FIG. 5) having semicircular diameters are formed at the lower ends of the two prongs 7A and 7B of the pusher, and these shaft portions 7C and 7D are engaged with the bearing portion 6D of the movable contact piece holder 6. Match. A protruding piece 7E is provided at the center of the lower end of the pusher 7, and this protruding piece 7E is positioned in the groove 6F formed on the upper edge of the movable contact piece holder to ensure the seesaw movement of the movable contact piece holder 6. It has a structure.

The structure of the upper part of the push button 16, operating rod 13, operating pin 9, and converter 8 is the same as the conventional one.

``Operations and Effects of the Invention'' As described above, according to this invention, since the push tool and the movable contact piece holder are axially coupled, there is no part that comes into sliding contact during the switching operation of the switch. As a result, it is possible to obtain a push-button switch that can perform switching operations with a light operating force.

Also, since there are no sliding parts, the operation is smooth and the switching operation feels good.

Further, a projecting piece 7E provided at the center of the lower end of the pusher 7 is located within a groove 6F formed on the upper edge of the movable contact piece holder 6, and is prevented from coming off from the groove 6F.
Therefore, during assembly, the protruding piece 7E of the pusher 7 does not easily slip out of the groove 6F of the movable contact piece holder 6, resulting in the effect that the push button switch can be easily assembled.

[Brief explanation of the drawing]

Figure 1 is a sectional view for explaining an embodiment of this invention, Figure 2 is a perspective view for explaining the structure of a movable contact holder used in this invention, and Figure 3 is a converter used in this invention. 4 is a partially sectional front view to explain the internal structure of the converter shown in FIG. 3, and FIG. 5 is a side view of the pusher used in this invention. FIG. 6 is a perspective view for explaining the structure, FIG. 6 is a cross-sectional view for explaining the conventional push button switch, and FIG. 7 is a perspective view for explaining the structure of the movable contact piece holder used in the conventional push button switch. . 1...Switch body, 2...Common contact, 3, 4
...Fixed contact, 5...Movable contact piece, 6...Movable contact piece holder, 6D...Bearing part, 7...Press tool, 8...
Converter, 8A...Axis, 8B...Chevron protrusion, 8C,
8D... Inclined surface, 8E, 8F... Engaging portion, 8G...
...Sliding guide part, 9...Operation pin, 11...Spring,
12... Cylindrical body, 13... Operation rod, 14...
Spring receiver, 15... Spring, 16... Push button.

Claims (1)

[Scope of Claim for Utility Model Registration] A: A common contact provided at the center of the bottom of the switch body, B: At least one fixed contact provided at a position away from the common contact on the bottom of the switch body, C: The common contact mentioned above. a movable contact piece that makes seesaw movement with D as a fulcrum and one of its free ends comes into contact with and separates from the fixed contact; A movable contact piece holder in which a groove is formed, a chevron-shaped protrusion on the upper part that is pivotally supported on the upper side of the switch body, and an engaging part at the lower end of the slope formed by the chevron-shaped protrusion, and is directed downward. Once a converter has a sliding guide part, a push tool that applies a pressing force toward the movable contact holder and has a protruding piece that protrudes downward from the center part and is located in the groove; A push button switch comprising: an operation pin that moves and is assigned to either one of the engaging portions by the chevron-shaped inclined surface of the converter, and alternately switches the converter in the opposite direction.