JPH034008Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a variable resistor used in a dimmer or the like.

[Technical background of the invention and its problems]

Conventionally, commonly used variable resistors are contactors that come into contact with a resistor by sliding or rotating the operating body in one direction, as shown in, for example, Japanese Utility Model Application Publication No. 56-53305. In many cases, the resistance value can be varied step-by-step by selecting the position of the resistor, or the resistance value can be varied step-by-step by sequentially bringing a contact into contact with the step-by-step positions of the resistor.

All of these devices sequentially change the resistance value from large to small or from small to large, and cannot omit an intermediate step and cannot make large changes instantaneously. Furthermore, since the stepless type and the stepped type cannot be used in common, they are used depending on the purpose.

[Purpose of invention]

The present invention is an attempt to improve the above-mentioned points, and allows for free stepless and stepwise variation, as well as easy large variation.
The purpose is to reduce the number of parts and make it inexpensive.

[Means for solving problems]

The variable resistor of the present invention includes a device main body, a resistor arranged approximately in an annular shape on the device main body, and a resistor that swings or slides approximately 360° around a certain point on the central axis of the device. The apparatus includes an operating body freely provided on the instrument body, and a contactor as a connecting conductor that is attached to the operating body via a spring and connected to and separated from the resistor.

[Effect]

In the variable resistor of the present invention, the contactor comes into contact with the resistor by swinging or sliding the operating body in any direction approximately 360 degrees around a certain point on the central axis of the approximately annular resistor. The resistance value is changed depending on the contact position, and the resistance value can be varied steplessly or in stages.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 5.

Reference numeral 1 denotes an instrument main body, and the instrument main body 1 includes a lower case 3 made of synthetic resin that is open on the upper surface and has a flange 2 formed on the outer periphery of the upper end, and a circular window hole 4 that is open on the lower surface and in the center of the upper surface. The upper case 5 is mounted on the lower case 3 with a support 7 made of synthetic resin having a through hole 6 formed in the center, and is screwed with several screws 8. combined.

At the upper center of the support 7, a metal support 10 having a spherical support part 9 is connected to several screws 11.
The operating body 12 is supported by the support body 10. This operation body 12 has a metal support rod 14 attached to the lower center of a disk-shaped push button 13 made of synthetic resin located inside the window hole 4 of the upper case 5. Spherical fulcrum part 1
5 is formed, and an operating rod 1 is provided at the bottom of this fulcrum portion 15.
6 is provided protrudingly, and a metal cylindrical contact 17 with an open upper end is fitted into this operating rod 16 so as to be able to move forward and backward, and between the lower end of the operating rod 16 and the inner bottom of the contact 17. A coil spring 18 is interposed,
The contact 17 is always urged downward. The fulcrum portion 15 is rotatably fitted into the support portion 9 of the support body 10, and the push button 13 of the operating body 12 is supported so as to be movable by pressing in all directions from a horizontal state.

A circular insulating board 19 is attached to the center of the bottom wall of the lower case 3 with several screws 20, and a recess 21 is formed in the upper center of the board 19. recess 21
A resistor 22 is formed concentrically and substantially annularly around the recess 21 on the outside of the resistor 22 , and a terminal piece 23 is provided at one end of the resistor 22 . The lower end of the contactor 17 is slidably abutted on the substrate 19.

In this way, the operating body 12 is provided so as to be able to swing approximately 360° about the fulcrum 15 at a certain point on the central axis of the resistor 22.

Further, a phase control device 24 is attached to one side of the lower case 3 with its terminal piece 25 protruding downward, and the phase control device 24 is attached to the support body 10.
and the terminal piece 23 of the resistor 22 are connected.

The phase control device 24 includes, for example, a triax Q ₁ , a trigger diac Q ₂ , a capacitor C, a coil L, and a variable resistor R of the present invention, as shown in FIG. E is connected to the main switch S and a load M such as a lamp, and the value of the variable resistor R is changed to change the phase of the trigger signal, which triggers the tryout.
The phase of _Q1 is controlled to control the power given to the load M.

Then, press button 13 from the off state shown in FIG.
When the push button 13 is pressed at any point on the outer circumference side, the push button 13 rotates on the fulcrum 15, and together with the operating rod 16, the contact 17 is deflected to one side, and its lower end is connected to the resistor 2.
2, the circuit consisting of the support 10, the support rod 14, the spring 18, the contactor 17, and the resistor 23 is brought into conduction, resulting in the ON state shown in FIG.

At this time, no matter which position on the outer periphery of the push button 13 is pressed, that is, no matter which direction the push button 13 is tilted, the contact 17 can be tilted correspondingly to turn on.

Then, in this state, if the push button 13 is continuously moved and pressed along its outer periphery and the slope of the push button 13 is moved as it is, the contact position of the contact 17 with respect to the resistor 22 changes continuously, and the resistance value can be varied steplessly. Further, by pressing the outer circumference of the push button 13 at intervals, the resistance value can be varied in steps. Furthermore, push button 13
The desired resistance value can be immediately set by tilting the resistor to the position of the desired setting value.

In this way, the resistance value for phase control can be quickly set as desired.

Further, when the push button 13 is rotated from the ON state shown in FIG. 2 to the horizontal state, the lower end of the contact 17 engages with the central recess 21, resulting in the OFF state shown in FIG. 1.

In the above embodiment, the surface of the push button 13 of the operating body 12 is made to protrude slightly from the upper surface of the upper case 5, but as shown in FIG.
3 may be set to be the same as the upper surface of the upper case 5.

By doing this, it becomes easy to distinguish between off and on states, and when turning off from the on state, the push button 13 is set horizontally using the upper surface of the upper case 5 as a guide, making it easy to change the off position. can be decided.

Next, in the embodiment shown in FIGS. 7 to 10, the operating body is of a sliding type in the embodiment shown in FIGS. 1 to 5. Note that the configurations of the instrument main body 1 and the phase control device 24 are basically the same as those in the previous embodiment.

The operating body 31 is a cylindrical knob 3 made of synthetic resin.
A disc-shaped guide plate 33 is formed on the outer circumference of the lower end of the guide plate 2, and an annular protrusion 34 is formed on the upper surface of the outer circumferential side of this guide plate 33. Further, a cylindrical support tube 35 is provided at the lower center of the knob 32, a coil spring 36 is inserted into this support tube 35, and a metal ball 37 as a contact is attached to the lower end of this spring 36. It is attached in a downwardly biased state.

Further, the gap between the inner surface of the upper case 5 of the instrument body 1 and the upper surface of the support 7 is formed to a size that allows the guide plate 33 of the operating body 31 to be inserted, and the through hole 6 is centered on the upper surface of the support 7. A ring-shaped protrusion 38 is formed.

The guide portion 33 of the operating body 31 is slidably inserted into the gap between the upper case 5 and the support 7 in approximately 360° direction about a certain point on the central axis of a substantially annular resistor 43, which will be described later. has been done.

A bottomed cylindrical connection terminal 39 that supports the ball 37 at its upper edge is fixed to the center of the bottom wall of the lower case 3 with a rivet 41 together with an external terminal piece 40. Furthermore, lower case 3
An annular insulating substrate 42 with the connection terminal 39 as its center is mounted concentrically outside the connection terminal 39 on the bottom wall of the , and a substantially annular insulating substrate 42 is mounted on the bottom wall of the substrate 42 in a substantially annular shape and inclined inward. A resistor 43 is formed, a terminal piece 44 is provided at one end of this resistor 43, and this terminal piece 44 is connected to the phase control device 24. The upper end edge of the connection terminal 39 and the resistor 43 are formed concentrically at an interval at which the ball 37 is supported.

Then, turn knob 3 from the off state shown in FIG.
2 moves in an arbitrary direction, the ball 37 moves in the same direction, that is, moves from above the connection terminal 39 to between the connection terminal 39 and the resistor 43, and connects the connection terminal via the ball 37 as a conductive connection body. 39 and the resistor 43 are brought into conduction to be in the on state shown in FIG.

When moving the knob 32, the guide plate 33 provides appropriate resistance due to the protrusion 34 of the guide plate 33 that slides on the lower surface of the upper case 5 and the protrusion 38 of the support 7 that slides on the lower surface of the guide plate 33. It slides while being received, and maintains its position when stopped.

At this time, no matter which direction the knob 32 is moved, the ball 37 moves correspondingly and can be turned on.

If the knob 32 is continuously moved in a circular motion in this state, the contact position of the ball 37 as a contact element with respect to the resistor 43 changes continuously, and the resistance value can be varied steplessly. Further, by moving the knob 32 to the position of the desired setting value, the desired resistance value can be immediately set.

If the knob 32 is moved to the center from the on state shown in FIG. 8, the ball 37 will move onto the connection terminal 39, resulting in the off state shown in FIG. 7.

[Effect of idea]

According to the present invention, the contact and the resistor are electrically connected even when the operating body is swung or slid in any direction of approximately 360 degrees around a certain point on the central axis of the approximately annular resistor. If the operating body is continuously displaced, the contact position of the contact with respect to the resistor changes continuously, and stepless variation can be achieved. Since the operating body can be freely moved to the desired position, the desired resistance value can be set immediately, and the contact for conducting to the resistor is attached to the operating body. Since there is no contactor as a separate movable part, the number of parts is small, assembly is easy and inexpensive, and it is suitable for use in dimmers and the like.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing one embodiment of the variable resistor of the present invention, and FIG. 3 is a plan view of FIG. 1.
FIG. 4 is a plan view of the portion shown in FIG. 1, FIG. 5 is a circuit diagram, and FIG. 6 is a sectional view showing another embodiment of the present invention.
7 and 8 are cross-sectional views showing still other embodiments of the present invention, FIG. 9 is a plan view of FIG. 7, and FIG.
The figure is a perspective view of the parts of FIG. 7. DESCRIPTION OF SYMBOLS 1... Instrument body, 12... Operating body, 17... Contact, 18... Spring, 22... Resistor, 3
1... Operating body, 36... Spring, 37... Ball as a contact, 43... Resistor.

Claims (1)

[Claims for Utility Model Registration] A device main body, a resistor arranged approximately in an annular shape on the device main body, and a resistor that swings or slides approximately 360° around a certain point on the central axis of the device. A variable resistor comprising: an operating body freely provided on the device main body; and a contactor as a connecting conductor that is attached to the operating body via a spring and connected to and separated from the resistor.