JPH0341391Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rotationally operated electrical component that combines a switch device and a sliding electrical component.

[Background of the idea]

Sliding type electrical components such as variable resistors and rotary switches are used in various electrical equipment including audio equipment. Such a sliding electric component includes a conductive pattern formed on a substrate, such as a resistive layer, a conductive layer, or an electrode, and a slider that slides on the conductive pattern, and rotates the slider. This changes the resistance and turns the switch on and off. When this type of sliding electric component is used, for example, to adjust the volume of an audio device, the sliding electric component is usually used only when the power switch of the electric circuit provided in the main device to which it is installed is turned on. It is being activated for the first time.

In such a case, if the operating shaft of the power switch and the operating shaft of the above-mentioned sliding electric component can be used in common, the device can be made smaller, but generally the rotation range of the operating shaft of the power switch is not very large. For this reason, conventionally,
It is necessary to install a sliding electric component and a separate power switch component on the main device's operation panel, etc.
However, the disadvantage was that the entire main device became larger.

[Purpose of invention]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a rotationally operated electrical component that integrates a power switch device and a sliding electrical component into one component.

[Summary of the idea]

In order to achieve this object, the present invention includes first and second substrates facing each other with a predetermined spacing between them, and a rotatable structure that is rotatably arranged between the first and second substrates, and is supported by a return spring. an operating shaft that automatically returns to a neutral position; a cam body that is swingably supported by the first board about the support shaft and swings as the operating shaft rotates; The cam body includes a movable terminal and a fixed terminal that perform on/off operations of the switch, and a slider that is attached to the operating shaft and slides on a conductive pattern provided on the second board. The present invention is characterized in that two engaging portions are provided in a protruding manner, and a pair of operating protrusions that can be engaged with and disengaged from the engaging portions are formed on the operating shaft at a predetermined distance.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings.

The first substrate 1 shown in FIG. 2 is made of an insulating material, has a pair of fixed terminals 2 and 3 made of a conductive material fixed to the left and right parts of the lower part, and has a flat receiving part on the upper part of both terminals 2 and 3. 2a and 3a are provided. Also board 1
A transparent fitting 5 is provided in the center of the board 1 to rotatably block an operating shaft 4, which will be described later.
A movable terminal 6 is provided with contact portions 6a and 6b that come into contact with either one of the two, and is swingably provided on a support shaft 7 fixed to the substrate 1. The movable terminal 6 has a main body 6c having a substantially annular shape, a lower hanging portion 6d supported by the support shaft 7, and the contact portions 6a and 6b formed at both ends of the main body 6c.

A cam body 8 made of synthetic resin is swingably supported on the support shaft 7, and a protrusion 8a serving as an engaging portion is provided above the cam body 8 at one location. This protrusion 8a is disposed between a pair of operating protrusions 4a formed around the operating shaft 4 shown in FIGS. 4 to 6, and is pressed by either one of the operating protrusions 4a. The cam body 8 is rotated clockwise or counterclockwise around the support shaft 7.

In this embodiment, the switch is turned off when the receiving part 2a of the fixed terminal 2 and the contact part 6a of the movable terminal 6 come into contact, and the switch is turned off when the receiving part 3a of the fixed terminal 3 and the contact part 6b of the movable terminal 6 come into contact. It is in a state of

In FIG. 2, reference numeral 10 has an arcuate shape that engages one end 10a at the tip of the protruding part 8a of the cam body 8, and the other end 10b at the receiving part 6e formed at the top of the main body 6c of the movable terminal 6. The other end 10 is an oval wire spring.
One end 10 with respect to the line L connecting b and the center of the support shaft 7
a to the left and right, the operation of the cam body 8 provides a biasing force for the movable terminal 6 to quickly swing in a direction opposite to the swing direction of the cam body 8.

Further, the second board 20 shown in FIG. 3 is made of an insulating material, and has three fixed terminals 21, 22, 23 fixed to its lower part.
The electrode layers 24a and 24b are electrically connected to each other. Furthermore, the operation shaft 4 is located at the center of the second board 20.
The electrode layers 24a and 24b are formed in a substantially arc shape on the surface of the second substrate 20 around the periphery of the hole 25. Further, among the three fixed terminals, the fixed terminal 22 located at the center is electrically connected to a straight part 26b of a conductor 26 having an arcuate part 26a formed on the upper part.

Either one of the electrode layers 24a, 24b is
The sliding body 27a formed on the current collector 27 fixed to one side of the operating shaft 4 and the arcuate portion 26a of the conductor 26 are in contact with the peripheral portion 27b of the current collector 27, respectively.

The operating shaft 4 has a non-circular through hole 28 formed in the center, into which an operating knob 29 can be inserted.
Then, the circumferential portion of the through hole 28 is slightly raised, and the circumferential portion 27 of the current collector 27 is formed in a ring shape around the raised portion.
b is arranged, and two places on this peripheral part 27b are connected to the operating shaft 4.
It is fixed by a small protrusion 4b protruding from the upper surface. A cylindrical portion 4c protrudes from the lower part of the operating shaft 4, and an arcuate portion 4d is formed around the upper portion concentrically with the cylindrical portion 4c. An operating protrusion 4a is formed. The distance between the operating protrusions 4a can be set arbitrarily as long as it is around the operating shaft 4. Further, a return spring 30, which will be described later, is wound between the back of the operating protrusion 4a and the cylindrical part 4c, and both ends 3 of this return spring 30
0a, 30b extend outward from the operating projection 4a.

The first substrate 1 and the second substrate 20 described above are opposed to each other and are integrally held by a holding frame 32 through a box-shaped outer case 31 made of an insulator with an opening 31a formed in the lower part. Ru. and the outer case 3
An operating shaft 4 is disposed inside the operating shaft 4, and the operating protrusion 4a of the operating shaft 4 can be engaged with and detached from the protrusion 8a of the cam body 8 provided on the first substrate 1.
The sliding body 27a and peripheral portion 27b are configured to contact the electrode layers 24a, 24b and the arcuate portion 26a of the second substrate 20, respectively. Furthermore, both ends 30a and 30b of the return spring 30 are in contact with the sides of the opening 31a of the outer case 31, so that a biasing force in a direction opposite to the rotational direction of the operating shaft 4 is stored.

In this embodiment, when the sliding body 27a and the left electrode layer 24a are kept in contact with each other, the resistance or capacitance value is reduced by an electrical processing means (not shown), and the volume of the audio equipment is increased, for example. Further, if the sliding body 27a and the right electrode layer 24b are left in contact with each other, the volume is reduced by electrical processing means.

Next, the operation of the above embodiment will be explained.

When the operating shaft 4 is rotated counterclockwise by rotating the operating knob 29 counterclockwise, the left operating protrusion 4a comes into contact with the protrusion 8a of the cam body 8, causing the cam body 8 to rotate clockwise. . At this time,
Due to the swinging of the cam body 8, one end 10a of the wire spring 10 moves to the right side of the line L. Due to this movement, the elastic force of the wire spring 10 is applied to the movable terminal 6, and the movable terminal 6 moves counterclockwise. The receiving portion 2a of the fixed terminal 2 and the contact portion 6a of the movable terminal 6 come into contact with each other, and the switch is turned off.

Also, when the operating shaft 4 is rotated clockwise, the second
As shown in the figure, the right operating protrusion 4a is connected to the cam body 8.
The cam body 8 is rotated counterclockwise. At this time, the one end 10a of the wire spring 10 moves to the left side of the L due to the swinging of the cam body 8, and this movement causes the elastic force of the wire spring 10 to be applied to the movable terminal 6. is quickly rotated clockwise, and the receiving portion 3a of the fixed terminal 3 and the contact portion 6b of the movable terminal 6 come into contact, resulting in a switch-on state.

In addition to the above-mentioned switch operations, volume adjustments and the like are also performed. That is, if the operating knob 29 is kept rotated clockwise with the switch turned on by the operating shaft 4, the sliding body 2
Since the left electrode layer 7a and the left electrode layer 24a are in contact with each other, the volume increases corresponding to the contact time. To maintain the switch-on state, when the rotational force of the knob 29 is released, the sliding body 27a is moved to the insulating layer portion 24c, which is the neutral position between the left and right electrode layers 24a and 24b, by the action of the return spring 30. The operating shaft 4 is held.

Also, to lower the volume, use the operation knob 29.
is kept rotated counterclockwise by the operating shaft 4 to the extent that the cam body 8 is not activated.
Since the sliding body 27a and the right electrode layer 24b are in contact with each other, the volume is decreased by an amount corresponding to the contact time. Then, by releasing the rotational force of the knob 29, the sliding body 27a is positioned in the non-resistance layer portion 24c by the return spring 30, and is maintained at the volume value, in the same manner as described above.

In the above embodiment, a rotary switch in which the electrode layers 24a and 24b were formed on the second substrate 20 was explained, but the present invention can be similarly applied to a variable resistor in which a resistance layer is formed in place of the electrode layer. It is possible.

[Effect of idea]

As explained above, according to the present invention, other sliding electric parts can be operated within the rotation range of the operating shaft that turns on and off the power switch device, so it has both of these functions. The structure of the main device to which the rotary operation type electric component is attached can be simplified and downsized, and by providing a return spring, the operation shaft can always be automatically returned to the neutral position.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the present invention, with Figure 1 being a side view of the entire switch device, Figure 2 being a front view showing the first board, and Figure 3 being a front view showing the second board. 4 is a perspective view showing the operating shaft, FIG. 5 is a front view of the operating shaft, and FIG. 6 is a side view of the operating shaft. 1... Board, 2, 3... Fixed terminal, 4... Operating shaft, 6... Movable terminal, 7... Support shaft, 8... Cam body, 20... Second board, 24a, 24b... Conductive Pattern, 27a...Sliding body.

Claims (1)

[Scope of utility model registration request] a first and a second substrate facing each other with a predetermined interval therebetween; an operating shaft rotatably disposed between the first and second substrates and automatically returned to a neutral position by a return spring; A cam body that is swingably supported on a first board about a support shaft and is swung by the rotation of the operating shaft, a movable terminal that operates the switch on and off in conjunction with the cam body, and a fixed a terminal, a slider attached to the operating shaft and sliding on a conductive pattern provided on the second board, one engaging portion protruding from the cam body, and the operating shaft. A rotationally operated electric component, characterized in that a pair of operating protrusions that can be engaged with and detached from the engaging portion are formed on a shaft at a predetermined distance.