KR960016268B1 - Motor driving rotari switch - Google Patents

Abstract

none.

Description

Rotary switch for motor drive

The drawings are all for explaining an embodiment of the present invention,

1 is a front view showing a part of the rotary switch broken according to the present invention.

2 is an exploded perspective view.

3 (a) and 3 (b) are explanatory diagrams showing the positional relationship between the first divided part and the second divided part;

4 is an operation explanatory diagram.

* Explanation of symbols for main parts of the drawings

2: rotating shaft 3: cam plate

4: connecting gear 5: spring

6: bowl 8: motor

10: first encoder 12: wafer

20: CPU21: second encoder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary switch for motor drive, and more particularly, to a rotary switch for motor drive, which is operated by any of driving and manual operation by a motor, and in which a click feel can be obtained during manual operation.

In audio or TV equipment, for example, it is common to perform a selection switching operation of various functions such as FM and CD by manual operation and remote operation.

As the mechanism of the switching operation, the drive shaft of the motor is connected to the drive shaft of the manual operation of the rotary switch, and the split mechanism for rotation positioning is provided on the drive shaft of the rotary switch.

In such a conventional apparatus, by driving the drive shaft of a rotary switch during manual operation, this drive shaft is positioned by a split mechanism. Since this divided position corresponds to each contact, switching of a contact is performed with a click feeling. On the other hand, when driving by a motor, the drive shaft of the rotary switch connected with the drive shaft of a motor is rotated, and switching is performed similarly to the above.

However, in the above-described conventional rotary switch, the dividing mechanism for manual operation is operated even when driven by a motor. Therefore, in this case, when the rotating shaft provided with a split mechanism is driven by a motor, a rotational force will fluctuate every time it passes through the protrusion part and the groove part of a split mechanism. For this reason, the motor has to be the torque more than the maximum of the fluctuating torque, and it is necessary to use the motor of the high drive torque, and it was expensive. In addition, an unnecessary click sound was generated when the motor was driven, which was annoying to the ears.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to be driven by a motor and a manual operation. It is to provide a rotary switch that can be performed.

The object includes a rotating shaft, a contact switching means for exchanging a contact by rotating the rotating shaft, a first divided part having a cam mount, and a second divided part having a dividing element adjacent to the cam mount, A split mechanism provided by loosely inserting a second divided part which is one side of the divided part on the pivot shaft, and fixing the other first divided part, and a second divided part in the loosely inserted state during automatic operation. A motor which rotates the rotational shaft integrally with the first divided part in a fixed state, a reduction gear means interposed between the motor and the second divided part, and decelerates the rotation of the motor, and the contact point. And a first encoder for detecting a rotation angle position of the first encoder and a first encoder for detecting a rotation angle position of the second divided component in the loosely fitted state. When the automatic operation is performed, the first and second bipartite parts rotate integrally to switch the contact by the contact switching means, and during the manual operation, the first divided part in the fixed state is moved. It is achieved by slid with respect to the second divided part in the loosely fitted state, and configured to switch the contact by the contact switching means while giving a split feel.

In the present invention, since the divided parts in the loosely inserted state are rotated by the motor during the automatic operation, and the divided parts fixed to the rotating shaft are rotated integrally with the loosely inserted divided parts, the contact is switched by the contact switching means. This is done.

In the case of manual operation, when the rotating shaft is rotated by manual operation, the divided parts fixed to the rotating shaft are prevented from transmitting rotation of the rotating shaft by the reduction gear means, and the divided parts in the loosely inserted state are stopped. The contact is switched by the contact switching means while sliding and giving a division reduction.

Then, the motor is corrected and driven based on the detection signal of the first encoder for detecting the rotation angle of the rotational shaft and the detection signal of the second encoder for detecting the rotation angle of the divided parts in a loosely fitted state. The switching of the contact by can always be performed correctly.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 is a front view showing a part of a rotary switch broken according to the present invention, FIG. 2 is an exploded perspective view, and FIGS. 3 (a) and (b) show a first divided part and a second division in an embodiment. Explanatory drawing which shows the positional relationship with a component, FIG. 4 is explanatory drawing of an Example.

As shown in these figures, the bearing part 1a is provided in the front plate 1, and the rotating shaft 2 is inserted in this bearing part 1a, and is rotatably supported. This rotating shaft 2 is formed in the same diameter shape through the operation part 2a of the circular cross section which protrudes outside the bearing part 1a, and the operation part 2a and the annular groove 2b, and is formed in the said bearing part 1a. The shaft portion 2c to be fitted, the fixing shaft portion 2d having a non-circular cross section having a flat surface at the end of the shaft portion 2c, and a smaller diameter than the shaft portion 2d are loosely fitted. It consists of the small-axis part 2e and the non-circular-operation shaft part 2g which is the same diameter shape as this small-axis part 2C, and formed the flat surface.

In this fixing shaft portion 2d, the cam plate 3 having the non-circular cross-section hole 3a is fitted and fixed at the hole portion 3a. Therefore, when the rotation shaft 2 rotates, the cam plate 3 ) Is to be rotated integrally.

On one surface of the cam plate 3, a plurality of cams 3b made of a concave-convex surface formed in a ring shape around its outer circumference are provided.

The shaft part 2e is rotatably fitted in the insertion hole 4a of the connection gear 4, and the connection gear 4 is rotatably supported with respect to the shaft part 2e.

The receiving holes 4b and 4b are formed at symmetrical positions on the surface of the coupling gear 4 facing the cam plate 3 with the insertion holes 4a interposed therebetween, and in these receiving holes 4b. A spring 5 and a bowl 6, which are divided parts, are accommodated. The bowl 6 is pressed against the cam 3b of the cam plate 3 by the elasticity of the spring.

A worm gear 7 is engaged with the connecting gear 4, and the worm gear 7 is fitted and fixed to the rotation shaft 8a of the motor 8.

Therefore, when the worm gear 7 for driving the motor 8 is rotated, the connecting gear 4 engaged with the worm gear 7 rotates, and the bowl 6 causes the cam 6 to be cam 3b. Since the cam plate 3 pressed against the shaft rotates integrally with the connecting gear 4, the rotating shaft rotates with this.

On the other hand, when the rotating shaft 2 is manually operated, as described above, the cam plate 3 rotates integrally, but the worm gear 7 does not rotate relative to the drive from the drive transmission path of the motor 8 and the reverse direction. , The connecting gear 4 is in a non-rotating state, and the bowl 6 slides on the cam 3b of the cam plate 3 to give a divided feel to the rotating shaft 2 by the rotation of the cam plate. .

The working shaft portion 2g is fitted to the hole portion 3a on the non-circular cross section of the first encoder 10 for angular position detection. In the first encoder 10 for detecting the angular position, a rotating body having a code plate (not shown) and a sliding element that slides on the code plate is provided, and the rotating body is integral with the rotation shaft 2. It is supposed to rotate. The output terminal 10b of the first encoder 10 is connected to the input terminal of the CPU 20.

In addition, a second encoder 21 for detecting the angular position is provided for the connection gear 4, and the output terminal 21b of the second encoder 21 is an input terminal of the CPU 20. Is connected to. In addition, 21a is a round hole in which the rotation shaft 2 is loosely fitted, and 21c is an engagement hole which is provided in the rotating body and into which the engagement protrusion pin 4c of the connecting gear 4 is fitted. In this way, the rotational angle of the rotational shaft 2 is detected by the first encoder 10, the rotation of the motor 8 is controlled by the CPU 20 to which the detection signal is input, and the rotational axis at the time of automatic operation. (2) It is comprised so that only the angle of this objective may rotate. In addition, when the detection signal of the 1st encoder 10 and the detection signal of the 2nd encoder 21 are judged compared with the CPU 20 at the end of automatic operation, and are not a normal state (it demonstrates later in detail). ), The motor 8 is driven by the control signal from the CPU 20 to rotate the rotating shaft 2 to the end, thereby correcting it to a normal state.

The working shaft portion 2g fitted into the hole portion 10a of the position detection encoder 10 is fitted into the signal switching wafer 12 through the insertion hole 11a of the frame body 11. . Although not shown in the wafer 12 for signal switching, a conductor plate and a rotating plate are accommodated. Six conductors ... are formed in this conductor plate in the circumferential direction, and a flap is extended in the radial direction. In the rotating plate, the conductor plate and the rotating plate are integrated by caulking the tip of the pin by six holes of the conductive plate with twelve pins installed in the circumferential direction of one side thereof. On the other hand, the pin not facing the hole is pressed and locked between the conductor plate and the rotating plate. In this way, the integrated conductor plate and the rotating plate are provided on the rotational shaft 2 to rotate integrally.

An insertion hole 12a through which the rotation shaft 2 is inserted is formed in the wafer 12, and clips are arranged radially at equal intervals at the peripheral edges of the insertion hole 12a. The clip is formed in a shape folded into two, and an eyelet is inserted into the small hole of the retracted portion and inserted into the mounting hole of the wafer 12 for caulking. Therefore, each clip is arranged radially from the periphery of the insertion hole 12a toward the center, and the tip of each flip is arranged in a circular shape. The contact part of a conductor plate is arrange | positioned between two pieces of the front-end | tip of this clip, for example, two adjacent clips are connected by this contact part. By rotating the rotational shaft 2, the conductor plate is also rotated, so that the contact portion of the conductor plate slides the leading end of each clip in order to perform the switching operation of the switch. Each clip is connected to each terminal 12b ... protruding from the lower surface of the wafer 12.

In the embodiment, the contact switching means is constituted by the conductor plates, the rotating plate, the clip, the wafer 12, and the like attached to each other. In the embodiment, two wafers 12 are provided in parallel. It is.

The front plate 1 is caulked to the frame body 11, the fixing piece 11b of the frame body 11 is inserted into the rear plate 13 while holding the signal switching 12, and is caulked to the first plate. As shown in the figure, the rotary switch of the embodiment is assembled. In addition, 14 is a shaft stop washer, 16 is a motor 8 installation hole, and 17 is a drive shaft 8a insertion hole of the motor 8.

Next, the operation of the embodiment will be described. At the time of motor driving, the connecting gear 4 is rotated via the worm gear 7 by the rotation of the motor 8. Since the bowl 6 is press-contacted to the cam 3b of the cam plate 3 by the spring 5, the cam plate 3 rotates integrally with the connecting gear 4 by the pressure contact force, and the hole part In (3a), the rotation shaft 2 fitted to the cam plate 3 rotates.

Thus, when the predetermined rotation angle is reached, the first encoder 10 for angular position detection detects the angle, a detection signal is generated from the terminal 10b, and the detection signal is input to the CPU 20, and the motor (8) stops. At this time, in the signal switching wafer 12, the contact portion of the conductor plate connects two clips which are connected at predetermined positions, and a switch signal is output from the terminal 12b.

At the time of driving the motor, the connecting gear 4 and the cam plate 3 rotate integrally, and a smooth switching operation is performed without generating a click feeling.

On the other hand, when the operator rotates the rotation shaft 2 during the manual operation, the cam plate 3 rotates integrally with the rotation shaft 2, and the connection for which rotation is prevented by the worm gear 7 It is rotated with respect to the gear 4. Then, the cam 3b of the cam plate 3 slides with respect to the bowl 6 in the receiving hole 46 of the connection gear 4, and the bowl 6 in turn moves the cam 3b of the cam plate 3 in order. I'm riding over. By this operation, a click feel is obtained on the rotational shaft 2, and positioning is performed for each contact position of the contact switching means as described above by rotation of the rotational shaft 2, so that a desired switch switching operation is performed. This is done.

As described above, in the above embodiment, during the manual operation, the operator can feel the click and rotate the rotation shaft 2 at a predetermined position to perform the switch operation. The switching operation of the switch is performed.

By the way, in the above embodiment, in the automatic operation by the motor 8, the relation between the bowl 6 and the cam 3b is not normal compared to the normal state shown in FIG. ), The motor may be driven. Even in the state of FIG. 3 (a), when the motor is driven, the CPU 20 controls the position of the stop pulse and enters the stop pulse, so there is no problem, but from the state of FIG. The operation had the following problems. That is, at the position where the bowl 6 has stopped at the top of the cam 3b, as shown in FIG. 3 (a), the wafer 12 has a normal stop position (P1, P2, P3) as shown in FIG. In comparison, for example, positioning is performed in the states P4 and P5 which are shifted by 15 degrees. Therefore, in the positioning of the rotating shaft 2, the switching position is all turned OFF.

In the present embodiment, however, the detection signal of the first encoder 10 and the detection signal of the second encoder 21 are compared by the CPU 20 as described above at the end of the automatic operation. If a difference of more than a predetermined value is present in both detection signals, a correction signal is input from the CPU 20 to the motor 8, and the motor is corrected and driven by this correction signal, that is, the rotation shaft 2 is right or left. By turning to the end, the bowl 6 is moved from the state of FIG. 3A to the state of FIG. For this reason, even if there is a difference (deviation) between the rotation angle of the rotational shaft 2 and the rotation angle of the connecting gear 4 during the automatic operation by the drive of the motor 8, the motor at the end of the automatic operation (8) is corrected and driven, and the rotation angle of the rotation shaft 2 and the rotation angle of the connection gear 4 are in a normal state. Therefore, the switching operation of the contact by the wafer 12 at the time of manual operation is always performed normally.

Thus, according to the embodiment, since the torque of the motor 8 does not fluctuate by a click action at the time of motor drive, a low-torque motor can be used, and the switch operation | movement which does not generate a click sound at the time of operation is performed, and motor drive is complete | finished. If a deviation occurs in the rotational angle between the rotational shaft 2 and the connecting gear 4 later (or other timing), the correction drive is performed and is always set in a state where accurate manual operation is possible.

Moreover, also in the structure, each component is attached (attached) with respect to a common rotating shaft, the whole becomes compact, and it becomes a simple structure.

As described above, in the present invention, a click is generated only during manual operation, a low torque motor is used for motor driving without torque fluctuation, and a comfortable switching operation without a click sound can be performed. Even if an angle shift of the rotation shaft occurs, the manual operation is always performed by correcting it, and the structure can be simplified to make the whole compact.

Claims (1)

The first divided part 3 and the cam peak 3b each having a rotation shaft 2, contact contact means 12 in which contacts are exchanged by rotation of the rotation shaft 2, and a cam peak 3b. Second split parts 4, 5, 6 having split elements 6 which are pressed against each other, and the second split parts 4, 5, 6 which are one of the split parts on the pivot shaft 2; The split mechanisms 3, 4, 5 and 6, which are loosely fitted and fixed by fixing the first split part 3 on the other side, and the second split parts 4, 5, which are in the loosely inserted state during automatic operation. 6) the motor 8 for rotating the pivot shaft 2 by integrally rotating the first divided part 3 in the fixed state, the motor 8 and the second divided parts 4, 5, 6) a deceleration gear means (7) intervening between (6) and decelerating the rotation of the motor (8), a first encoder (10) for detecting the rotation angle position of the contact point, and the loosely fitted state Above the rotation angle of the second divided part (4, 5, 6) 2nd encoder 21 which detects a tooth, and at the time of the automatic operation by which the said motor 8 is performed, the said 1st, 2nd bipartite parts 3, 4, 5, 6 are carried out. The switch is integrally rotated to switch the contact by the contact switching means 12, and during the manual operation, the second divided parts 4, 5 and 6 in the loosely fitted state of the first divided part 3 are fixed. And a switch to slide the contact by the contact switching means (12) while providing a split feel.

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