JP2748166B2 - Electric slide volume - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric slide volume housed in a rectangular parallelepiped unit case for assembling a device and having a slide terminal moved by a drive motor.

2. Description of the Related Art A slide volume used as a fader in a sound adjustment desk or the like includes a model that can automatically perform setting of its position, and the configuration of the model is as follows.
A wire 95 guided by four pulleys 98, the end of which is wound around a pulley 94 which is rotated by a drive motor 93 mounted in a unit case 96 as shown in FIG.
With a slide terminal 92 guided by a guide rail 91.
It has a structure in contact with.

Outside the unit case 94, there is provided a board 97 on which two drive circuits for controlling the drive motor 93 are mounted (a unit corresponding to the other drive circuit is not shown in the drawing). Control), the control of moving the slide terminal 92 to a predetermined position is performed by controlling the rotation of the drive motor 93 in response to a signal from a control device (not shown).

The drive circuit mounted on the board 97 and controls the rotational position of the drive motor 93 according to an external control signal includes:
Since the control characteristics need to be delicately changed in accordance with the characteristics of the resistor on which the slide terminal 92 slides, the drive circuit board includes an adjusting device for achieving control characteristics corresponding to the characteristics of the resistor. A semi-fixed resistor is installed.

Therefore, when the entire unit case 96 is replaced as a consumable part during maintenance or repair (the board 97 on which the drive circuit is mounted is not replaced), the characteristics of the resistor in the newly installed unit and the Since there is a difference between the characteristics of the resistor in the unit that was installed before, it is necessary to adjust the semi-fixed resistor to compensate for the difference. Since it is not a task that anyone can do because of the necessity of a suitable measuring instrument and a skilled technique, there has been a problem that a technician has to go to the site at the time of replacement.

In addition, since a long time is required for the adjustment, there is a problem that when replacing all units of the adjustment console to which a large number of electric slide volumes are attached, the replacement work becomes extremely long.

Furthermore, when the drive motor 93 is driven, heat is generated in the components (transistors) attached to the drive circuit board, and this heat also causes damage to the components.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric slide volume that can be easily replaced and has less damage due to heat generation.

Means for Solving the Problems To solve the above problems, the electric slide volume of the present invention is housed in a rectangular parallelepiped unit case for device integration, the slide terminal is moved by a drive motor, and the drive motor, A drive circuit board on which a drive circuit for driving the drive motor is mounted, and an electric slide volume housed in the unit case, wherein the unit case is formed of a metal having good heat conductivity; A configuration is adopted in which heat generated by the drive circuit is radiated to the outside through the unit case.

Further, another electric slide volume of the present invention is housed in a rectangular parallelepiped unit case for incorporating a device, a slide terminal is moved by a drive motor, and the drive motor and a drive circuit for driving the drive motor are provided. An electric slide volume in which the mounted drive circuit board is housed in the unit case, wherein the drive circuit board has a heat-generating component mounting portion and a component surface heat radiation formed in the vicinity of the heat-generating component mounting portion. The pattern and the solder surface heat radiation pattern formed on the solder surface corresponding to the component surface heat radiation pattern are connected by through holes, and the unit case has a thick portion that contacts the solder surface heat radiation pattern. The configuration that has been adopted.

Operation Since the drive circuit board on which the drive circuit is mounted and the drive motor are built in the unit case, when the electric slide volume is replaced, the drive circuit board and the drive motor are connected to the new unit. Replace with a suitable adjusted one.

Also, the heat generated from the components that make up the drive circuit is
It is released to the outside through a unit case made of a metal having good thermal conductivity.

Further, heat from the component is transmitted in the order of the component-side heat radiation pattern → the through hole → the solder surface heat radiation pattern → the thick part of the unit case, and is released to the outside.

Embodiment FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line BB in FIG.

In the figure, a unit case 12 is made of a metal having good heat conductivity such as aluminum, and is formed of a substantially rectangular parallelepiped unit case body 121 having one side wall opened, and a material similar to the unit case body 121. And a unit case side wall 122 that is a side wall that seals the unit case main body 121.

Further, two parallel guide rails 14 and 19 are attached to the unit main body 121 in the vertical direction.

A slider 191 which is made of plastic and moves along the guide rail 19 is fixed to a lower portion of substantially the center of the slider 141 which is made of metal and moves while being guided by the guide rail 14. Also, the slider 141
In the upper part of the is a knob support plate 131 is attached,
The knob 13 is fixed to an upper portion of the knob support plate 131.

At one end of the unit case main body 121, a drive motor 20 having a pulley 112 fixed to its rotating shaft is fixed by a fixed belt 201, and at the other end, a pulley paired with the pulley 112 is provided. 111 is rotatably supported by a pulley support 1111. A rubber belt 11 is hung between the pulleys 111 and 112, and the rubber belt 11 and the slider 191 are connected to each other at a substantially center of the slider 191 by a belt fixing member 17.

A slide terminal 15 as a pair of sliders is attached to the upper part of the slider 191.A resistor is applied to the surface of a unit case side wall 122 corresponding to the slide terminal 15, and the guide rail 14, A rectangular resistance unit 16 long in the axial direction of 19 is attached, and the slide terminal 15 is in contact with the resistance unit 16.

A substantially rectangular drive circuit board 23 is attached to the innermost portion below the unit case main body 121, and near one end of the drive circuit board 23, an electrode 18 constituting a touch switch is connected. A connector 231 for connecting the lead wire 181 and a connector 232 for connecting an external control line are attached, and the other end thereof controls a DC current supplied to the drive motor 20. A transistor 24, which is a heat-generating component that generates heat during operation, is mounted. Further, a wiring for supplying a direct current to the drive motor 20 is provided between the drive circuit board 23 and the drive motor 20.

FIG. 3 is a plan view showing a detailed configuration of the drive circuit board 230, and FIG. 4 is a sectional view taken along the line AA in FIG.

The drive circuit board 23 includes a touch detection circuit for configuring a touch switch, and a drive circuit that drives the drive motor 20 in response to a control signal externally supplied via a connector 232, and includes a transistor. On the heat radiating surface of the heat radiating plate 244 and the component surface 233 in the vicinity thereof, a rectangular component surface heat radiating pattern 241 is formed. A solder surface heat radiation pattern 243 having the same shape as the surface heat radiation pattern 241 is formed. The component-side heat dissipation pattern 241 and the solder-side heat dissipation pattern 243 are connected by a large number of through holes 242.

In a state where the drive circuit board 23 is attached to the unit case main body 121, a thick portion 1212 which is raised on the drive circuit board 23 is formed at a position corresponding to the solder surface heat radiation pattern 243 on the side wall 1211 of the unit case main body 121. The thick portion 1212 is in contact with the solder surface heat radiation pattern 243.

The operation of the electric slide volume of the present invention having the above configuration will be described below.

When the unit case side wall 122 is attached to the unit case body 121, the drive circuit board 23,
The operation as an electric slide volume incorporating the resistance unit 16, the slide terminal 15, and the like is performed. That is, the connector
When a signal is guided from the outside via 232, the drive motor 20 rotates to move the slide terminal 15 to the position indicated by the signal.

Further, during the operation of rotating the drive motor 20, heat is generated in the transistor 24, and the generated heat is transmitted from the heat radiating plate 244 to the component surface heat radiating pattern 241, Is transmitted to Then, the heat guided to the solder surface heat radiation pattern 243 is applied to the thick portion 1 in contact with the solder surface heat radiation pattern 243.
The heat is transmitted to 212, and is radiated to the outside via the side wall 1211 constituting the unit case 12.

The electric slide volume according to the present invention is incorporated in an operation panel of a control console in a theater, a hall, a studio, or the like, and is used for adjusting various facilities such as sound, video, and lighting for controlling volume, sound image, reverberation time, light amount, video, and the like. Usually used as

In particular, in the case of a large adjustment table incorporating a large number of units corresponding to dozens of signal systems, at a manufacturing site or an installation site, a semi-fixed resistor and a resistor of a drive circuit board are required.
Conventionally complicated adjustment work can be omitted or reduced.

That is, when incorporated in the drive circuit board unit, the semi-fixed resistor and the resistor are adjusted in a one-to-one correspondence, and thereafter, a single component is handled as an adjusted unit. Therefore, when the unit is incorporated into the operation panel or frame of the large-sized console, there is no need for readjustment.

Advantageous Effects of the Invention The electric slide volume according to the present invention is housed in a rectangular parallelepiped unit case for incorporating a device, a slide terminal is moved by a drive motor, and the drive motor
A drive circuit board on which a drive circuit for driving the drive motor is mounted, and an electric slide volume housed in the unit case, wherein the unit case is formed of a metal having good heat conductivity; Since the heat generated by the drive circuit is radiated to the outside through the unit case, adjustment of the drive circuit at the time of replacement is not required, and thus the replacement can be completed easily. It works. In addition, since the heat from the heat-generating components of the drive circuit is radiated to the outside via the unit case made of a metal having good thermoelectricity, even when the drive circuit board is built in the unit case, Can be prevented from rising, and damage to components due to heat can be prevented.

Further, another electric slide volume according to the present invention is housed in a rectangular parallelepiped unit case for incorporating a device, a slide terminal is moved by a drive motor, and the drive motor and a drive circuit for driving the drive motor And a drive circuit board on which is mounted an electric slide volume housed in the unit case, wherein the drive circuit board has a mounting portion for the heat-generating component and a component surface formed near the mounting portion for the heat-generating component. The heat radiation pattern and the solder surface heat radiation pattern formed on the solder surface corresponding to the component surface heat radiation pattern are coupled by through holes, and the unit case has a thick portion that contacts the solder surface heat radiation pattern. Since it is formed, the replacement is similarly simplified, and it is possible to prevent damage to the component due to heat.

[Brief description of the drawings]

 FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line BB in FIG. 1, FIG. FIG. 1 is a sectional view taken along line AA in FIG. 1, and FIG. 5 is a front view showing a conventional technique. 12 Unit case 1212 Thick part 15 Slide terminal 20 Drive motor 23 Drive circuit board 24 Heat-generating component 241 Heat-dissipation pattern on component surface 242 Through-hole 243 Heat radiation on solder surface pattern

Claims (2)

(57) [Claims] 1. A drive circuit board in which a slide terminal is accommodated in a rectangular parallelepiped unit case for incorporating a device, a slide terminal is moved by a drive motor, and a drive circuit for driving the drive motor is mounted. In the electric slide volume housed in the unit case, the unit case is formed of a metal having good heat conductivity, and heat generated from the drive circuit is radiated to the outside through the unit case. Characterized electric slide volume. 2. A drive circuit, wherein a slide terminal is accommodated in a rectangular parallelepiped unit case for incorporating a device, the slide terminal is moved by a drive motor, and a drive circuit board on which a drive circuit for driving the drive motor is mounted. In the electric slide volume housed in the unit case, the drive circuit board includes a heat-generating component mounting portion and a component-surface heat radiation pattern formed near the mounting portion of the heat-generating component. A corresponding solder surface heat radiation pattern formed on the solder surface is connected by a through hole, and the unit case has a thick portion that is in contact with the solder surface heat radiation pattern. Slide volume.