JP2019154850A - Geared motor and geared motor unit - Google Patents

Abstract

To provide a geared motor capable of operating a drive object, such as a toy, to a user's taste in a simple configuration.SOLUTION: A geared motor 10 includes a rotating member 20, a position detection sensor 50, and a board 60. The rotating member 20 includes a flange 24 having a different diameter in a rotation limit position, and a movable contact piece 55 of the position detection sensor 50 abuts on the rotating member 20 when the rotating member 20 turns to step parts B1, B2 of the rotation limit position. A motor driver assembled into the board 60 stops drive of a motor 40 according to detection of the rotation limit position by the position detection sensor 50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motor, and more particularly to a motor that can be used for toys, machine tools, and the like.

  In the field of toys, machine tools, and the like, movable devices such as robot toys and animal toys can have a built-in driving device to move limbs and the like in a complex manner. In order to control the movement of such a toy, the toy is equipped with a servo motor and a position detection sensor. For example, the position detection sensor detects a rotation angle of a foot or the like, and the servo motor performs feedback control based on the detected rotation angle (see, for example, Patent Document 1).

Japanese Patent No. 4695243

  When using a servo motor, the control program must be designed and the control circuit must be mounted on the board. Also, the position detection sensor must be configured to detect the position with high accuracy in performing feedback control. This is an excessive drive control for machines such as toys and machine tools that simply require movement according to the user's preference.

  Therefore, there is a need for a drive system that has a simple configuration and can make a toy or the like perform an operation that suits the user's preference.

  A geared motor according to an aspect of the present invention is provided around a rotation member attached to an output shaft of a motor capable of rotating in the forward and reverse directions, and around or inside the gear case, and sets a rotation limit position in each of the rotation directions of the rotating member. And a position detection sensor capable of detection. The motor can rotate between the rotation limit positions in the forward and reverse rotation directions according to the rotation limit position detected by the position detection sensor.

  On the other hand, the geared motor according to another aspect of the present invention includes a position detection sensor that can detect the rotation limit position in each of the forward and reverse rotation directions of the rotating member, and the rotating member is detachable. When the rotation member is attached to the output shaft of the motor from the output shaft end side, the position detection sensor can detect the rotation limit position in each of the forward and reverse rotation directions of the rotation member. As such a geared motor, a motor capable of forward and reverse rotation and a contact switch provided around or inside the gear case, and when a rotating member is attached to the motor output shaft from the output shaft end side, It is possible to configure a geared motor in which the switch contacts the rotating member at the rotation limit position in each of the forward and reverse rotation directions of the rotating member.

  The rotating member of the present invention that can be attached to such a geared motor can be detachably attached to the output shaft of the geared motor from the end side of the output shaft, and can be directly (directly or indirectly) driven. A power transmission member to be connected and a flange whose shape changes at the boundary of the rotation limit position, that is, at the boundary portion of its own rotatable range.

  Further, the above-mentioned geared motor, an operation unit operated to turn the motor on / off in each of the forward and reverse rotation directions, a motor driver connected to the motor, the operation unit, and the position detection sensor, and a power source The provided geared motor unit can be configured, and the motor driver stops driving the motor when the rotating member rotates to the rotation limit position in each of the forward and reverse rotation directions.

  According to the present invention, a driving object such as a toy can be operated so as to meet a user's preference with a simple configuration.

The perspective view of a geared motor is shown. The top view of a geared motor is shown. The front view of a geared motor is shown. The side view of a geared motor is shown. It is an electric circuit diagram of a geared motor unit. It is the top view which looked at the other example of the rotation member from the top.

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

  1 to 4 are diagrams showing configurations of a geared motor and a geared motor unit according to the present embodiment. FIG. 1 is a perspective view of a geared motor, and FIG. 2 is a plan view of the geared motor as viewed from above. 3 is a front view of the geared motor, and FIG. 4 is a side view of the geared motor.

  The geared motor 10 including the gear 30 and the motor 40 such as a DC motor is configured as a small geared motor applicable to toys, machine tools, and the like here. The gear 30 that is a reduction mechanism is accommodated in the gear case 30C. The gear case 30C is fixed to a motor 40 (motor case), and the gear 30 and the motor 40 are integrated.

  The geared motor 10 includes a substrate 60. The board | substrate 60 is arrange | positioned beside the gear case 30C and the motor 40, and is arrange | positioned along the direction of the output shaft 45 of the motor 40 (refer FIG. 4 etc.). Along with the substrate 60, a substrate 62 and a substrate 64 are disposed along the output shaft side end surface 30T of the gear case 30C and the end surface 40T of the motor 40, respectively (see FIG. 4).

  The substrate 60 is fixed to the gear case 30C with screws or the like. On the other hand, the protrusion 60T of the substrate 60 fits into the recess 62T of the substrate 62, while the protrusion 64C of the substrate 64 fits into the rectangular opening 60C of the substrate 60. The substrate 60 and the substrates 62 and 64 are fixed and supported with respect to the gear 30 and the motor 40 by such connection between the substrates and soldering.

  A rotating member 20 that can be detachably attached is attached to an output shaft 45 of the motor 40. The rotating member 20 includes a gear 22, a flange 24, and a cylindrical portion 26 that transmit a driving force of the motor 40 to a driving object such as a toy (see FIG. 4). The gear 22 can be connected to a gear mechanism (not shown) connected to the driven object. For example, when the rotating driving object is connected to the gear 22, the driving object rotates according to the rotation of the motor 40.

  The flange 24 formed between the gear 22 and the cylindrical portion 26 regulates its own rotation range and rotates at a position separated from the gear case 30C by a predetermined distance S. Here, the shape of the flange 24 is a disc shape having a different diameter with a half circumference as a boundary, and a region having a large diameter is a first flange portion 24A and a region having a small diameter is a second flange portion 24B. The flange 24 can be integrally formed by manufacturing with a 3D printer or the like. Note that the gear 22 may be formed of another member capable of transmitting power, such as a servo horn.

  The position detection sensor 50 is disposed on a protrusion 60T that is an end portion of the substrate 60, and here is constituted by a lever-type contact switch that outputs in two directions. The movable contact piece 55 of the position detection sensor 50 faces the direction along the substrate 60, that is, the direction along the output shaft 45 of the motor 40, and can swing along the substrate 60.

  The position of the position detection sensor 50 is determined so as to switch from the non-contact state to the contact state depending on the rotation position of the rotary member 20. Specifically, the position along the output shaft direction so that the stepped portions B1 and B2 that are the boundary of the change (shape change) of the diameter of the rotating member 20 and the movable contact piece 55 are in contact outside the gear case 30C, and A distance D from the axis center X of the output shaft 45 to the movable contact piece 55 is determined. 1 to 4 illustrate a state in which the rotating member 20 does not contact the movable contact piece 55, that is, the second flange portion 24 </ b> B is adjacent to the movable contact piece 55.

  A power source and an operation unit (not shown here) are connected to the substrate 60, and a motor driver is mounted. When power is supplied to the motor 40 and the user operates the operation unit, the motor 40 rotates and stops (hereinafter referred to as a geared motor unit including these elements). In the present embodiment, the geared motor unit is used as a drive system for a drive object, so that the drive object is driven and the drive range is limited in accordance with a user's manual operation. This will be described below.

  FIG. 5 is an electric circuit diagram of the geared motor unit.

  The motor driver 80 is connected to the position detection sensor 50, the operation unit 70, and the power supply 90, and is connected to the motor 40 through signal lines formed on the substrate 60 and the substrate 64. The operation unit 70 includes a pair of switches (hereinafter referred to as operation switches) 72 and 74, and is connected to input terminals 82 and 84 of the motor driver 80, respectively. When the operation switch 72 is pressed and turned on, the motor 40 rotates in the forward rotation direction (clockwise) CW and continues to rotate until it is turned off. When the operation switch 74 is pressed and turned on, the motor 40 rotates in the reverse rotation direction (counterclockwise) CCW and continues to rotate until it is turned off.

  The position detection sensor 50 includes a pair of switches (hereinafter referred to as position detection switches) 52 and 54 and is connected to input terminals 82 and 84 of the motor driver 80, respectively. When the rotary member 20 rotates in the forward rotation direction CW and the stepped portion B2 comes into contact with the movable contact piece 55, the position detection switch 52 is turned on. On the other hand, when the rotating member 20 rotates in the reverse rotation direction CCW and the stepped portion B1 comes into contact with the movable contact piece 55, the position detection switch 54 is turned on. When the position detection switch 52 or the position detection switch 54 is turned on, the motor driver 80 sets the drive signal to the motor 40 to the OFF state and stops driving the motor 40.

  When the above-described geared motor unit is used as a drive system that rotates a drive object such as a toy in both directions, the user can rotate the drive object by operating one of the operation switches 72 and 74. . For example, when a geared motor unit is used as a drive system for a battleship model turret, the user can experience a movement similar to the movement of an actual turret by pressing the operation switches 72 and 74 alternately. It is also possible to make the driven object reciprocate linearly.

  On the other hand, when the motor 40 continues to rotate, the rotating member 20 comes into contact with the movable contact piece 55 of the position detection sensor 50, and the motor 40 stops driving. The rotating member 20 can rotate clockwise CW and counterclockwise CCW within a range where the movable contact piece 55 is in contact with the stepped portions B1 and B2 (here, a half circumference) so that the rotation range is less than one rotation. Is regulated.

  Therefore, even if the user continues to press either one of the operation switches 72 and 74, when the rotating member 20 rotates to a contact position with the movable contact piece 55 (hereinafter referred to as a rotation limit position), the rotation of the drive target is also stopped. Since the rotatable range (movable range) of the driving object follows the rotatable range of the rotating member 20, by adjusting the gear ratio of the coupling mechanism between the driving object and the gear of the rotating member 20, The movable range of the driven object can be limited. For example, if the movable range of the turret of the battleship model is set to a range in which the cannon does not come into contact with other parts, the rotation will not be over by the user operation.

  Thus, according to the present embodiment, the geared motor 10 includes the rotating member 20, the position detection sensor 50, and the substrate 60. The rotating member 20 has flanges 24 having different diameters at the rotation limit position, and the movable contact piece 55 of the position detection sensor 50 comes into contact when the rotation member 20 rotates to the step portions B1 and B2 at the rotation limit position. The motor driver 80 incorporated in the substrate 60 stops driving the motor 40 in response to detection of the rotation limit position by the position detection sensor 50.

  By configuring the geared motor 10 including the rotation member 20 and the position detection sensor 50, it is possible to set the movable range of the drive target, and the user can operate the operation unit without knowing the movable range of the drive target. The object to be driven can be moved as intended by operating 70.

  The geared motor 10 according to the present embodiment is a general-purpose geared motor including a gear 30 and a motor 40, in which the rotating member 20 is mounted on the output shaft 45, the substrate 60 is disposed along the output shaft 45, and the position The detection sensor 50 is configured to be easily assembled by mounting it on the substrate 60. Accordingly, it is possible to provide a drive system that can realize a reliable operation even for a user's own crop.

  In particular, the movable range can be defined only by the combination of the rotating member 20 and the position detection sensor 50, and it is necessary to configure a feedback control system that performs control based on a continuous output signal from the position detection sensor, such as a servo motor. There is no. Further, since manual operation is performed by the user operation unit 70, there is no need for programming to move the drive target (motor 40).

  Furthermore, by providing the position detection sensor 50 and the rotation member 20 near or around the gear case 30C of the geared motor 10, the structure for contacting the position detection sensor 50 and the rotation member 20 is facilitated. It is possible to configure a switch having a typical movable contact piece 55.

  In this embodiment, the position detection sensor 50 is configured by a two-way output contact switch. For this reason, the rotation of the motor 40 can be prepared and reliably stopped at the rotation limit position of the rotating member 20. In particular, since the lever-type movable contact piece 55 is composed of a swinging switch, it becomes possible to detect the rotation limit position in both the forward rotation direction CW and the reverse rotation direction CCW with only one movable contact piece 55, The allowable rotation range of the rotating member 20 can be made larger or smaller.

  Further, the pair of position detection switches 52 and 54 constituting the position detection sensor 50 are connected to the forward rotation direction input terminal 82 and the reverse rotation direction input terminal 84 of the motor driver 80, respectively, like the pair of operation switches 72 and 74. ing. With such a simple circuit configuration, the rotating member 20 during rotation (during user operation) can be automatically stopped at the rotation limit position.

  On the other hand, in the present embodiment, the substrate 60 on which the position detection sensor 50 and the motor driver 80 are mounted is fixed and attached to the geared motor 10 (gear case 30C). With such an integrated configuration, it is not necessary to arrange the motor driver in a space different from the geared motor 10, and a drive system can be constructed simply by connecting the operation unit 70 and the power supply 90 to the substrate 60. Further, by disposing the substrate 60 along the output shaft 45, it is easy to determine the installation of the position detection sensor 50 so that the movable contact piece 55 is brought into contact with the rotating member 20.

  FIG. 6 is a plan view of another example of the rotating member as seen from above. However, the gear 22 is not illustrated.

  The rotating member 20 can be detached from the output shaft 45 as described above, and a rotating member having another flange shape can be attached. The rotating member 120 shown in FIG. 6A has a flange 124 partially formed with a notch portion 124A, and the rotating member 20 is within a range (within 60 °) of stepped portions B1 and B2 whose shapes change. It can be rotated. On the other hand, the rotating member 220 shown in FIG. 6B includes a flange 224 in which a fan-shaped protruding portion 224A is formed. Thereby, the rotating member 220 can rotate in a range of 300 ° or more.

  Considering that a rotating member having various rotatable ranges can be attached to the output shaft 45, the connection structure between the geared motor 10 and the drive target is left as it is, and the movable range of the drive target is maintained. A rotating member (such as the rotating members 120 and 220 in FIG. 6) having an adapted rotation limit position can be selectively attached to the output shaft 45. The shape of the flange may be other than that shown in FIG. A flange whose shape changes at the boundary of the rotatable range is formed in accordance with the rotation limit positions of both forward and reverse rotation, and the position is detected at the boundary where the shape change appears without contacting the position detection sensor 50 in the rotatable range. What is necessary is just to make it contact with the sensor 50. FIG.

  On the other hand, the position detection sensor 50 can be configured by an optical sensor or the like. In this case, light is emitted along the output shaft 45, and the rotation limit position of the rotating member 20 is detected by the light hitting the flange whose shape changes with the rotation limit position in each of the forward and reverse rotation directions as a boundary. Can do. Moreover, you may comprise so that the board | substrate 60 may not be integrated with the geared motor 10 but to install in another space. The motor 40 may be automatically driven without providing the operation unit 70.

  The gear case 30 </ b> C may be configured by a case in which the gear 30 is partially exposed and is configured by a receiving plate and a support column. In this case, the position detection sensor 50 may be provided inside the gear case 30C. Further, the geared motor 10 and the geared motor unit can be applied to a driving object other than the toy and the machine tool.

10 geared motor 20 rotating member 22 gear (power transmission member)
24 flange 30 gear 30C gear case 40 motor 50 position detection sensor 52, 54 position detection switch 55 movable contact piece 60 substrate 70 operation unit 72, 74 operation switch 80 motor driver 90 power supply

Claims (12)

A rotating member attached to the output shaft of the motor capable of rotating forward and reverse;
A position detection sensor provided around or inside the gear case and capable of detecting a rotation limit position in each of the forward and reverse rotation directions of the rotating member;
The geared motor, wherein the motor is rotatable between rotation limit positions in forward and reverse rotation directions in accordance with rotation limit position detection by the position detection sensor. The rotating member has a flange whose shape changes at a rotation limit position;
The geared motor according to claim 1, wherein the position detection sensor detects a boundary of the rotating member when the rotating member rotates to a rotation limit position.   The geared motor according to claim 1, wherein the position detection sensor detects a rotation limit position by contacting the rotation member.   The geared motor according to claim 3, wherein the position detection sensor is a switch having a movable contact piece that swings in response to contact with the rotating member.   The geared motor according to any one of claims 1 to 4, further comprising a board connected to the gear case and mounted with the position detection sensor.   The geared motor according to claim 5, wherein the substrate is disposed along an output shaft of the motor. A geared motor unit comprising the geared motor according to any one of claims 1 to 6,
An operation unit operated to turn the motor on / off in each of forward and reverse rotation directions;
A motor driver connected to the motor, the operation unit, and the position detection sensor;
With power supply,
The geared motor unit, wherein the motor driver stops driving the motor when the rotating member rotates to a rotation limit position in each of forward and reverse rotation directions. The position detection sensor has first and second position detection switches for detecting rotation limit positions in the forward rotation direction and the reverse rotation direction of the rotating member, respectively.
The operation unit has first and second operation switches operated to rotate the motor in the forward rotation direction and the reverse rotation direction, respectively.
The first position detection switch and the first operation switch are connected to a forward rotation input terminal of the motor driver,
The geared motor unit according to claim 7, wherein the second position detection switch and the second operation switch are connected to a reverse rotation input terminal of the motor driver. A motor capable of rotating forward and reverse,
A position detection sensor provided around or inside the gear case and capable of detecting a rotation limit position in each of the forward and reverse rotation directions of the rotating member;
When the rotation member is attached to the output shaft of the motor from the output shaft end side, the position detection sensor can detect the rotation limit position in each of the forward and reverse rotation directions of the rotation member. Geared motor. A motor capable of rotating forward and reverse,
A contact switch provided around or inside the gear case,
When the rotating member is attached to the output shaft of the motor from the output shaft end side, the contact switch contacts the rotating member at each rotation limit position in the forward and reverse rotation directions of the rotating member. And geared motor.   The rotating member having a rotation limit position corresponding to the movable range of the driven object among a plurality of rotation members having different rotation limit positions is attached to the output shaft of the motor. 10. A geared motor according to 10. It can be detachably attached to the output shaft of the geared motor from the output shaft end side,
A power transmission member coupled to the driven object;
A rotating member comprising: a flange whose shape changes at the boundary of the rotation limit position.

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