JPH03202093A - Driving circuit for movable figurative subject - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a drive circuit used for a movable shaped object that bends a part of its outer shape by sensing an external stimulus such as sound or light.

[Problem to be solved by the invention]

The applicant previously proposed that the appearance of a still life, such as a flower or a can, is used as a stationary interior decoration in a quiet environment, but for example, when a person speaks or applauds. He proposed a movable object whose external shape changes when the object is moved or when music is played. In the proposed movable object, a sound sensor including a microphone outputs an output, which turns on a switching element and supplies power to a motor drive circuit, thereby rotating the motor and causing its rotational movement. The external shape is changed by operating the swinging member, and when the external stimulus is removed, the motor is driven by a posture angle detection switch until the object returns to its original posture. However, for the movable object according to the above-mentioned optical proposal, either the posture angle detection switch detects the original posture of the object and the motor is stopped, or the electric charge accumulated in the drive coil of the motor is used to power the movable object. Even when the motor is turned off, the motor continues to rotate to some extent, making it difficult to stop the movable object at a predetermined position. In order to prevent such inconvenience, the attitude angle detection switch may be activated by considering the over-rotation angle of the motor in advance, but in this case, the moment of inertia of the movable object body and the load on the motor Because each item is different, it takes time to make adjustments, making the work process complicated and impractical. In view of the above-mentioned problems, the present invention provides a movable figure that can always keep the figure stationary in a predetermined posture by causing the motor to act as a brake when the motor stops without an external stimulus. The purpose is to provide a drive circuit.

[Means to solve the problem]

In order to achieve the above object, the movable figure according to the present invention has the following features:
A movable shaped body whose outer shape is bent and moved by a swinging member that swings as a result of the rotation of a motor installed therein, a motor drive switching element that supplies power from a power source to the motor, and a drive coil for the motor. a short-circuit switching element that short-circuits the motor; a sensor that detects an external stimulus such as sound or light; a posture angle detection switch that detects the posture angle of the movable object body; Turning on the drive switching element to rotationally drive the motor, and when the attitude angle detection switch detects a predetermined angle of the movable successor body, turning off the motor drive switching element and turning on the short circuit switching element. and a selection circuit for discharging the electric charge of the drive coil of the motor. The present invention is also characterized in that the selection circuit includes a prohibition circuit that prohibits selection of the motor drive switching element for a predetermined period of time after the short circuit is turned on.

[Effect]

In the above configuration, when the sensor catches an external stimulus, the motor drive switching element is turned on via the selection circuit.
Then, power is supplied to the motor from the power source to rotate the motor and swing the movable figure body. When the attitude angle detection switch is turned on as the motor rotates, the selection circuit turns off the motor drive switching element.
At the same time, the discharge switching element is turned on to short-circuit the drive coil of the motor, whereby the rotational force of the motor is applied to the braking force. Further, sensor input to the selection circuit is prohibited until the motor is stopped. Therefore, even if the external stimulus continues, the swinging motion of the movable figure body is temporarily stopped at a predetermined position.

【Example】

Before describing the embodiments of the present invention, the structure of the can-shaped movable object main body A will be described with reference to FIGS. 3A and 4. Reference numeral 1 denotes a bottom portion, which has a storage section 2 that can be opened and closed from the bottom surface, and a dry battery 3 as a power source is housed in this storage section in a replaceable manner. Further, a main switch 4 for supplying power from a battery 3 to a motor to be described later, and a microphone 5 corresponding to a sensor are attached to the bottom Ill. The main switch 4 is a lever 4a facing the outside of the bottom cover.
It is configured so that it can be turned ON and OFF by operating . A housing 6 is fixed to the upper surface of the bottom cover 1 with screws. This housing houses a motor 7, a gear group 8 including a spur gear for transmission, a deceleration gear consisting of a worm and a worm gear, and a friction clutch for overload prevention. The shaft 9 of the final gear in the gear group 8 is connected to the housing 6
A cam 10 is provided through the upper surface of the cam, and a drive pin 11 protrudes upward from the upper surface of the cam.
have. A fixing pin 12 is provided at the upper part of the housing 6 on opposite sides.
．． 12 is provided, and a swinging member 13 is attached to the fixed pin.
is provided. The swinging member 13 has left and right legs 14.14, a hole 15.15 provided at the lower end thereof is rotatably supported by the fixing pin 12.12, and a hole 15.15 provided at the lower end thereof is rotatably supported by the fixing pin 12.12. , a connecting member 16 is provided. Further, a long groove 17 is provided on the lower surface of the connecting member in a direction that connects both legs, and the driving pin 11 is inserted into the long groove. A cylindrical member 18 is integrally provided on the upper part of the swinging member 13, and an outward locking protrusion 1 is provided around the upper edge of the cylindrical member.
9 is formed. Furthermore, a protrusion 21 having a guide hole 20 into which a guide pin (to be described later) is inserted is integrally provided at the center of the cylindrical member 18 . A coil spring 22 is inserted inside the cylindrical member 18 so as to surround the protrusion 21, and an upper cover 23 having the same diameter as the bottom cover 1 is placed on the upper surface of the coil spring. The upper lid 23 has a guide pin 24 inserted into the guide hole 20 at the center of the lower surface thereof, and a plurality of downward protrusions 2 at positions corresponding to the outer periphery of the cylindrical member 18 on the lower surface thereof.
5, 25, etc. are provided. A locking pawl 26 that is engaged with one of the locking protrusions is integrally formed at the lower end of the projecting piece 25. Therefore, the upper lid 2
The locking protrusion 19 and the locking pawl 26 engage with each other, and the coil spring 22 prevents the locking member 3 from being moved upward by a predetermined amount or more. Reference numeral 27 denotes an outer skin member, which is made of a flexible plastic sheet. This outer skin member is attached by adhesive between the periphery of the bottom cover 1 and the periphery of the top cover 23, with the coil spring 22 being held somewhat compressed. The upper end of this outer skin member 27 is bent inside the upper lid 23, and a can lid-shaped case 23a is fitted therein. In FIG. 3, reference numeral 28 denotes an attitude angle detection switch, which is provided on the upper part of the housing 6, facing the outer periphery of the cam 10. The posture angle detection switch 28 is positioned so that it is turned off when the movable object is in an upright posture, that is, in a state other than the normal posture of a can, and turned on when it is in the normal posture. Further, reference numeral 29 denotes a substrate of the drive circuit shown in FIG. Figure 3B shows the movable figure main body A shown in Figure 3A above.
In this other example, the upper lid 23 is rotatably and vertically movably connected by a ball joint 30. That is, a rod 31 having a ball 30a is provided protruding from the upper end of the swinging member 13, and a recess 30b is provided on the lower surface of the lower lid 23 so that the ball 30a can freely rotate and move in the vertical direction. be. By using such a ball joint type, the movement of the movable object main body A can be made smoother. FIG. 4 shows a bent state of the movable object main body A according to this embodiment. That is, when the motor 7 rotates and the cam 10 is rotated via the gear group 8, the drive pin 11 rotates, and the swinging member 13 swings back and forth (or left and right). The member 27 is also bent as shown in FIG. 4(b), and the upright can is transformed into a bent can, and after returning to the state of FIG. 4(a), it is bent as shown in FIG. 4(c). bend in the opposite direction. In addition, this movable figure main body A, when in a normal resting state,
The can is maintained in a tensioned state by the action of the outer skin member 27 or the coil spring 22, and the original external shape of the can is maintained. Now, FIG. 1 is a drive circuit diagram of the movable figure main body A according to this embodiment, and the same components as those shown in FIG. 3 are given the same reference numerals. When the microphone 5 catches a sound exceeding a predetermined value, the microphone 5
It is connected to be input to one input terminal of a first NAND circuit (hereinafter referred to as NANDl) via a switching element Q1 made of a PN type transistor. In the figure, a is a selection circuit, which is a well-known flip-flop circuit (hereinafter referred to as F/F) configured by connecting two NAND circuits cross-connected. This F/F functions to turn on the motor drive switching element Q2 by using the signal from the NAND1 as a start signal, and to turn on the short-circuiting switching element Q3 by using the signal from the second NAND circuit, which will be described later, as a reset signal. In other words, this F/F acts to selectively operate both switching elements Q2 and Q3. The second NAND circuit (hereinafter referred to as NAND2) is turned on by the cam IO, which is rotated in synchronization with the rotation of the motor 7.
, the signal of the attitude angle detection switch 28 which is turned off is inputted through the inhibit circuit. The inhibiting circuit is composed of a well-known differentiating circuit consisting of a capacitor C1 and a resistor R1, and the signal of the attitude angle detection switch 28 is inverted from the output of the NAND2 after a delay of the time constant thereof. That is, during this time constant, even if the NAND1 outputs a signal to the F/F, the F/F acts to inhibit reverse operation. Both switching elements Q2. Q3 are both PNP type transistors, and their respective base terminals are connected to the two output terminals of the F/F. Among these, the collector terminal and emitter terminal of the motor drive switching element Q2 are connected to one line that supplies power from the power source 3 to the motor 7. Therefore, when a signal is input from the F/F to the base terminal of this motor drive switching element Q2, the motor 7 can be rotationally driven. On the other hand, the short-circuit switching element Q3 is provided such that its collector terminal and emitter terminal connect the drive coil of the motor 7 and both ends of the capacitor C8 provided in parallel with the drive coil. Therefore, when a signal is input from the F/F to the base of this short-circuit switching element Q3, the drive coil of the motor 7 is short-circuited, the electric charge in the drive coil is discharged, and the rotational force of the motor 7 is braked. be able to. Next, the drive circuit having the above configuration will be explained with reference to the time chart of FIG. It is now assumed that the main switch 4 is turned on and the movable figure main body A is in an operable state. At this time, if a sound exceeding a predetermined value is caught by the microphone 5, the NA
NDl drives F/F. The driven F/F operates the motor drive switching element Q2 and drives the motor 7 to rotate. As the motor 7 rotates, the outer shape of the movable object main body A is bent as described above. The rotation of the motor 7 causes the cam 10 to rotate at the same time, turning on the attitude angle detection switch 28. Turning on this posture angle detection switch 28 means that the movable object main body A
This means that the motor 7 has reached a predetermined position, and at this point it is necessary to stop the motor 7 as soon as possible. Therefore, when the posture angle detection switch 28 is turned on, N
AND2 inverts the output by a time constant T. As a result, the F/F stops driving the motor drive switching element Q2 and turns on the short circuit switching element Q3. By turning on the short-circuit switching element Q3, the charge in the drive coil of the motor 7 is discharged, and the motor 7 is braked and suddenly comes to a halt. Therefore, when the movable object main body A is located at a predetermined position, the motor 7 acts as a brake, and even if there is a slight difference in the moment of inertia of the movable object main body A or due to a change in the environmental temperature, the motor 7 acts as a brake. Even if the load applied to the motor from the outer skin member 27 differs due to the different degrees of flexibility of the motor 27, the motor can always be kept stationary in a predetermined normal state. The time constant T, which is the inversion time of the NAND 2, is set to a value greater than or equal to the voltage at the terminals of the motor 7 when the power is turned off, as shown by t in FIG. This NAND2
During the reversal time, even if input is received from microphone 5 to NANDl, F/F remains in the same state (motor 7 is stopped)
keep it. Therefore, even if sound is continuously captured by the microphone 5, the movable state of the movable object main body A is the state shown in FIG. It can be done. In the above embodiment, sound is used as an example of external stimulation, but it is also possible to use sensors that detect static electricity, light, pressure, etc. to cause bending motion. Furthermore, although a can is shown as an example of a movable object, it may also be a bottle or the like.

【Effect of the invention】

As mentioned above, the movable figure drive circuit according to the present invention includes:
When the posture angle detection switch detects a predetermined angle of the movable figure, the power to the motor is turned off, the drive coil of the motor is short-circuited, and the motor is braked, so that the movable figure is always at its original position. The normal posture angle can be maintained.

[Brief explanation of drawings]

Fig. 1 is a drive circuit diagram of a movable figure according to the present invention, Fig. 2 is a time chart, Fig. 3A is a sectional view of the can-shaped movable figure in its normal posture, and Fig. 3B is a diagram of the movable figure and other parts. FIG. 4 is a cross-sectional view of the example in the normal posture, and FIG. 4 is a process diagram illustrating the bending movement. 3... Power supply, 4... Main switch, 5... Sensor (microphone), 7... Motor, 13... Rocking member, 28... Attitude angle detection switch, A... Movable Figure body, a... selection circuit, b... prohibition circuit, Q2... motor drive switching element, Q3... short circuit switching element.

Claims (2)

[Claims] (1) A drive circuit for a movable figure, characterized by comprising the following components. (a) A movable figure main body whose external shape is bent and moved by a swinging member that swings by the rotation of a motor installed inside; (b) A motor drive switching element that supplies power from a power source to the motor; ( C) A short-circuit switching element that short-circuits the drive coil of the motor; (D) A sensor that detects external stimuli such as sound or light; (E) A posture angle detection switch that detects the posture angle of the movable object body; (F) ) When the sensor detects an external stimulus, the motor drive switching element is turned on to drive the motor to rotate, and when the posture angle detection switch detects a predetermined angle of the movable successor body, the motor drive switching element is turned on. A selection circuit that turns off the element and turns on the short-circuit switching element to discharge the electric charge of the drive coil of the motor. 2. The drive circuit for a movable figure according to claim 1, further comprising a prohibition circuit that prohibits the selection circuit from selecting the motor drive switching element for a predetermined period of time after the short circuit is turned on.