JPH0754966Y2 - Motor driven slide type variable resistor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a motor-driven slide type variable resistor capable of both motor driving and manual driving.

[Prior Art] FIG. 6 is a schematic view for explaining the operation of a conventional motor-driven slide type variable resistor, in which 1 is a motor, 2, 3, 4, and 5 are rotatable according to the driving force of the motor 1. A pulley 7 is fixed to the shaft 6 of the motor 1 by means of a pulley supported by. Reference numeral 8 is a towing body, for example, a wire wound around the pulley 7 a plurality of times.
The slider receiver 9 is stretched around the wire 8 and the both ends of the wire 8 are projected onto the protrusion 9a.
It is fixed with an adhesive after tying to.

Then, by the rotation of the motor 1 or the slider receiver 9
A slider (not shown) attached to the slider receiver 9 is manually moved by the knob 10 to move on a resistor (not shown) to change the resistance value.

[Problems to be Solved by the Invention] By the way, in the above-mentioned conventional structure, since the wire 8 is not endless in the coupling structure of the wire 8 and the slider receiver 9,
A means for fixing both ends to the slider receiver 9 is required, workability in assembly is poor, and the connection is unstable, and
The transmission mechanism of the rotational force to the slider receiver 9 of the motor 1 needs to wind the wire 8 around the pulley 7 a plurality of times in order to generate an appropriate frictional force between the pulley 7 and the wire 8. ,
The workability in assembling is poor, and since the rotational force is transmitted to the wire 8 of the motor 1 through the frictional force between the pulley 7 and the wire 8, there are problems such as lack of stability.

The present invention is intended to solve the above-mentioned conventional problems, and an object of the present invention is to improve workability in assembling the connecting structure of the towing body and the slider receiver, as compared with the conventional one. In addition, a motor drive slide type variable resistor that is stable in coupling between the two, has stable transmission of rotational force to the slider receiver of the motor, and has good workability in assembling the transmission mechanism. It is the one we are trying to provide.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a resistor main body having a first frame for mounting resistor parts and a second frame for mounting drive mechanical parts. Is divided into a frame body, and the first frame body is provided with a resistance substrate that forms a resistance body and a slider receiver to which a slider that slides on the resistance substrate is fixed. A motor and a plurality of pulleys are attached to the frame body, and an endless traction body having generally irregular teeth is stretched around the gear fixed to the shaft of the motor and each pulley, and the traction is applied to the gear of the motor. The teeth of the body are meshed with each other, and the teeth provided on the traction body are meshed with the teeth having irregularities provided on the slider receiver.

[Operation] According to the above-described embodiment of the present invention, the connecting structure of the traction body and the slider receiver is provided with an uneven tooth on the endless traction body stretched around the pulley. Since it is carried out by meshing with the uneven teeth provided on the slider receiver, it is possible to omit the conventionally required means for connecting the end of the towing body and the slider receiver with an adhesive, and workability is improved. And the bond between the two increases stability.

In addition, the transmission of the rotational force to the slider receiver of the motor is performed by meshing the toothed teeth provided on one edge of the towing body with the gear that is fixed to the motor. Stability is increased compared to the one performed through the friction force of the motor, and the transmission mechanism does not need to wind the towing body around the pulley fixed to the rotation shaft of the motor multiple times, and Workability is also improved.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 4 are explanatory views of an embodiment of the present invention. FIG. 1 is an exploded perspective view showing a drive structure of a motor drive slide type variable resistor, FIG. 2 is a top view and FIG. 3 is a slide. FIG. 4 is a perspective view showing a part of the pendulum receiver, FIG. 4 is a schematic view for explaining the operation of the variable resistor of the present invention, and FIG. 5 is an enlarged sectional view of a portion A in FIG.

In FIG. 1, reference numeral 20 is a first frame body, and a resistance substrate 22 having a resistor body 21 is attached to the bottom surface of the frame body 20. Two guide rods 25, 25 of a slider receiver 24 are installed on the side plates 23, 23 of the first frame body 20, and the slider receiver is guided by the two guide rods 25, 25. 24 is moved to the left and right, and a slider (not shown) attached to the slider receiver 24 slides on the resistor 21 on the resistor substrate 22.

Reference numeral 26 is a second frame body, and a motor 27 is fixed to the bottom surface of the frame body 26, and a gear 28 is provided on a shaft 28 (shown in FIG. 4) of the motor 27.
Is fixed.

The first, second and third pulleys 30, 31, 32 are rotatably provided on the bottom surface of the second frame 26. Reference numeral 33 denotes a towing body, that is, an endless belt having uneven teeth 34 on one surface. The belt 33 is wound around a first pulley 30, and then one surface is wound around a third pulley 32. Gears
The tooth 34 meshes with the tooth 34, and further extends in parallel with the resistor 21 around the second pulley 31 and returns to the other side of the first pulley 30.

The first frame body 20 and the second frame body 26 as described above are fitted as shown in FIG. 2, and the knob 38 has the first and second frame bodies 20,
Projecting outward from the groove 39 between the 26, and pressing the belt 33 toward the first frame 20 with a driver or the like through the hole 35 provided in the second frame 26, as shown in FIG. Teeth 34 on belt 33
Is inserted into a groove 36 provided on the side surface of the slider receiver 24, and is meshed with a tooth 37 having an uneven shape on one surface of the groove 36.

Next, the operation of the above variable resistor will be described with reference to FIG.

In the case of manual operation first, when the knob 38 formed integrally with the slider receiver 24 is moved in the direction of arrow B, the slider receiver 24 is also moved in the same direction, and the slider (not shown) moves to the first position. The resistance value changes by moving on the resistor 21 shown in FIG. At the same time,
Along with the movement of the slider receiver 24, the belt 33 also moves in the B direction, and rotates the gear 29 of the motor 27 in the clockwise direction, that is, the C direction via the first pulley 30 and the third pulley 32.

Next, in the case of motor drive, the motor 27 is energized and the shaft 28
Is rotated in the clockwise direction in FIG. 4, that is, in the C direction, the belt 33
Also rotates in the B direction via the gear 29, the second pulley 31, the first pulley 30, and the third pulley 32, the slider receiver 24 also moves in the B direction, and the resistance value changes.

When the shaft 28 of the motor 27 rotates counterclockwise, that is, in the counter C direction, the belt 33 moves in the counter B direction, the slider receiver 24 also moves in the same direction, and the resistance value changes. .

According to the above-described embodiment of the present invention, the coupling between the belt 33 and the slider receiver 24 includes the first, second and third pulleys 30,3.
The endless belt 33 stretched around the gears 29 fixed to the rotary shafts 28 of the motors 1 and 32 and the motor 27, and the teeth 34 having irregularities.
Is provided and the teeth 34 are meshed with the uneven teeth 37 provided on the slider receiver 24. Therefore, it is possible to omit the conventionally required coupling means between the end of the belt and the slider receiver. The workability in assembling is improved, and the connection between the two is more stable.

Further, the mechanism for transmitting the rotational force to the slider receiver 24 of the motor 27 is
Since it is performed by meshing the uneven teeth 34 provided on the belt 33 with the gear 29 fixed to the shaft 28 of the motor 27, it is performed through the frictional force between the conventional wire and the pulley fixed to the shaft of the motor. The stability is increased as compared with the conventional one, and the workability in assembly is improved because there is no step of winding the conventional wire around the pulley of the motor a plurality of times.

The first, second and third pulleys 30, 31, 32 are rotatably supported on the side of the second frame 26, and the bearing members thereof are tensioned with grease. . Therefore, it is possible to prevent the flexure of the belt 33 by utilizing the viscosity of the grease.

[Advantages of the Invention] According to the present invention, as described above, the coupling mechanism of the towing body and the slider receiver has an improved workability in assembly as compared with the conventional one, and the coupling between the two has the conventional one. Increase stability.

Further, the mechanism for transmitting the rotational force to the slider receiver of the motor is more stable than the conventional one and the workability in assembling is improved.

[Brief description of drawings]

1 to 4 are explanatory views of an embodiment of the present invention. FIG. 1 is an exploded perspective view showing a drive structure of a motor drive slide type variable resistor, FIG. 2 is a top view and FIG. 3 is a slide. FIG. 4 is a perspective view showing a part of the pendulum receiver, FIG. 4 is a schematic view for explaining the operation of the variable resistor of the present invention, FIG. 5 is a sectional view of part A of FIG.
The figure is a schematic diagram for explaining the operation of a conventional motor-driven slide type variable resistor. 20 …… first frame, 21 …… resistor, 22 …… resistor board, 24
...... Slider holder, 26 …… Second frame, 27 …… Motor, 28
...... Motor shaft, 29 …… Gear, 30, 31, 32 …… Pulley,
33 …… Belt (towing body), 34 …… Tooth, 37 …… Slider bearing tooth.

Claims (1)

[Scope of utility model registration request] 1. A resistor body is divided into a first frame body for mounting a resistor component and a second frame body for mounting a drive mechanical component,
The first frame body is provided with a resistance substrate forming a resistor body and a slider receiver to which a slider sliding on the resistance substrate is fixed, and the second frame body is provided with a motor and a motor. A plurality of pulleys are attached, and an endless traction body having teeth with unevenness on one edge is stretched around the gear fixed to the shaft of the motor and each pulley, and the teeth of the traction body are meshed with the gears of the motor. In addition, the motor-driven slide-type variable resistor characterized in that the teeth provided on the towing member are meshed with the uneven teeth provided on the slider receiver.