JPH069567Y2 - Motor Actuator - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" This invention is used for an operation part for an intake door of an air conditioner for an automobile, and detects a stop position in which the output shaft rotates in a constant rotation direction and stops in multiple positions. The present invention relates to a motor actuator having an electric switch having a function.

"Prior Art" FIG. 7 shows an example of a conventional stop position detection circuit, in which a notch portion 41 which is a non-conductive portion is provided on the outer peripheral edge of a conductive plate 40 attached to the lower surface of the output gear 3. The first and second brushes 42 and 43 are located on a circular orbit passing through the notch. For example, when the first brush 42 is located in the cutout portion 41,
The conductive plate 40 and the first brush 42 are not electrically connected to each other, but the common brush 44 is always in contact with the conductive plate 40. The common brush 44 includes a motor 45 and a first terminal piece 46.
To the first and second brushes 42 and 43, respectively.
A motor actuator 61 is formed by connecting to the terminal pieces 47 and 48.

The external circuit 62 will be described. The first terminal piece 4
6 is connected to the negative pole of the power source 50, and the other positive pole is connected to the common terminal 53 of the two-circuit two-contact type electrical switches 51 and 52. Fixed contact 54 of one electric switch 51,
The second and third terminal pieces 47, 48 are connected to 55, and one of the fixed contacts 56, 57 of the other electric switch 52 is connected to one end of the lamp 60 and the other end of the lamp 60 is connected. Is connected to the negative pole of the power supply 50.

The switch pieces of the electric switches 51 and 52 are fixed contacts 5.
When it is located on the side of Nos. 4 and 56, the lamp 60 is lit, it is displayed to the outside that the output gear of the motor actuator 61 is in the state of FIG. 7, and when the first brush 42 is located in the notch 41 and turned off. The motor 45 is stopped without being energized.

When the output gear 3 is located at a position other than the position shown in FIG. 7, the first brush 42 is connected to the conductive plate 40, so that the motor 45 rotates and the conductive plate rotates to rotate the conductive plate of FIG. Stop in the state.

When the electric switches 51, 52 are switched to the other fixed contacts 55, 57 side, the lamp 60 is turned off and the conductive plate 40 integrated with the output gear reaches the position of the second brush 43 until the cutout portion 41 reaches. Rotate and stop.

[Problems to be Solved by the Invention] A conventional motor actuator requires two circuit / two-contact electric switches 51 and 52 in which the configuration of the external circuit 62 is complicated, and the push button switch remains pressed. Keep the position. Furthermore, in view of the drawback that an electric switch with a mechanism that returns to the original state when pressed again is required,
A simple circuit of one circuit and one contact system is used for the electric switching unit of the external circuit 62, and a motor circuit for indicating the stop position equivalent to the conventional one and for detecting the motor stop position and the motor stop position are displayed. The lamp circuit is provided inside the actuator.

[Means for Solving the Problems] The present invention is a notch-shaped outer peripheral edge of a conductive plate provided on one surface of an output gear that is interlocked with a motor shaft via a reduction gear group or on a fixed surface corresponding to the output gear. 1 and a second non-conducting portion are provided,
A concentric semicircular arc-shaped non-conducting portion is formed in an intermediate portion of the output gear, the conductive plate and a common brush forming a circuit, and the first and second brushes are arranged on a printed circuit board. During rotation of the gear toward a specific stop position or toward the specific stop position, the first and second non-conducting parts and the first brush, and a semicircular arc-shaped non-conducting part provided on the conductive plate. A configuration in which the conductive plate is used for a part of each of the electric switches formed by the second brush, the non-conducting portion, and the common brush is used as means for solving the above problems.

"Operation" A conductive plate having cutout-shaped first and second non-conducting portions and a semi-circular arc-shaped non-conducting portion in the peripheral portion, and first and second contacting and separating the first and second non-conducting portions. When each electric switch is formed by the second brush and the common brush that comes in contact with and separates from the arc-shaped non-conducting portion, each electric switch is formed by utilizing a part of the conductive plate, The switch device of the circuit can be formed by a simple circuit.

[Embodiment] The present invention will be described with reference to the drawings of an embodiment. In FIG. 1, a motor shaft 1 of a motor M and a reduction gear group 2 are interlocked with each other, and a circular shape is formed on a lower surface of an output gear 3 which is a final reduction gear. The conductive plate 4 is concentrically fixed, and the output gear 3 has a shaft 8 attached thereto. The conductive plate 4 has first and second non-conducting portions 5 and 6 formed by notches and the like on the outer periphery and on the same circular orbit. Further, an arc-shaped non-conducting portion 7 which is a concentric circle and is formed of a semi-circular cutout groove is formed in an intermediate portion of the conductive plate 4.

A shaft hole 9 for bearing a shaft 8 axially attached to the output gear 3,
A common brush 10 is arranged on the printed circuit board 19 for profit. The common brush 10 is usually installed so as to come into contact with the central portion of the conductive plate 4.

The first brush 11 for opening and closing the motor circuit A for detecting the motor stop position is positioned on a circular orbit passing over the first and second non-conducting portions 5 and 6 and is in contact with the conductive plate 4. .
The second brush 12 for opening and closing the lamp circuit B for displaying the motor stop position is located on a circular orbit passing through the arc-shaped non-conducting portion 7 and placed on the printed circuit board 19 so as to come into contact with the conductive plate 4. The two circuits A and B are arranged depending on the stop position of the output gear 3 to which the conductive plate 4 is integrally attached.
Open and close.

In FIG. 3, the common brush 10, the first brush 11, and the second brush 12 are mounted on a fixed surface (not shown) such as a printed circuit board 19 or an inner wall of a case accommodating the actuator, and the wirings 15, 16 are provided. , 17, 18 contact the motor circuit A for detecting the motor stop position and the lamp circuit B for displaying the motor stop position.
0, 21, 22, 23 are connected. In particular, the first brush 11 is connected to one end of the motor M together with the third terminal 22, and the other end of the motor M is connected to the second terminal 21 by the wiring 16.

The first and third terminals 20 and 22 are connected to the negative pole of the power source 30 by the lead wires 24 and 26, and the second terminal 21 is connected to the positive pole of the power source 30 by the lead wire 25.
The third terminal 22 is connected by a lead wire 26 to one end of a switch device 35 having a simple structure of one circuit and one contact system, and the other end of the switch device is connected to the negative terminal of the power source 30 and the first terminal 20. ing. Terminal 4 23
Is connected to one of the lamps 32 for indicating the position of the output gear 3 by the lead wire 27, and the other of the lamps is + of the power source 30.
It is connected to the pole.

Here, the first and second non-conductive portions 5 and 6 of the conductive plate 4, the first brush 11, the motor M, the power supply 30, the common brush 20, the conductive plate 4
The first electric switch C of the motor circuit A formed in 1. is formed of the first brush 11, the non-conducting portions 5 and 6, and the conductive plate 4. The second electrical switch D of the lamp circuit B formed by the arc-shaped non-conducting portion 7 of the conductive plate, the second brush 12, the lamp 32, the power supply 35, the common brush 10, and the conductive plate 4 is non-conducting with the second brush 12. It is formed by the portion 7 and the conductive plate 4.

Next, the operation of this embodiment will be described. In the state shown in FIG. 3, when the first brush 11 is located in the first non-conducting portion 5,
The motor M is not energized and stopped. In this case, since the second brush 12 is in contact with the conductive plate 4, the lamp 32 is turned on. When the switch device 35 is turned on in this state, the output gear 3 rotates in the direction of the arrow X while the lamp 32 remains lit, and when the first brush 11 comes into contact with the conductive plate 4, the second brush 12 causes the arc-shaped non-conducting portion 7 to come into contact. Inside, the lamp 32 goes out and the stop position of the output gear 3 is displayed. However, even if the switch device 35 is turned off at this point, the first brush 1
Since 1 is in contact with the conductive plate 4, the motor M continues to rotate in the energized state (FIG. 4).

Then, when the first brush 11 reaches the second non-conducting portion 6, the motor M is de-energized from the power source and stops (fifth fifth).
Figure). In this case, the second brush 12 still has the arc-shaped non-conducting portion 7.
Since it is located inside, the lamp 32 remains off. When the switch device 35 is turned on in this state, the conductive plate 4 rotates in the direction of the arrow X, the first brush 11 and the second brush 12 both come into contact with the conductive plate 4, and the first and second electric switching parts C, D. Both the motor circuit A and the lamp circuit B are
When the switch device 35 is turned to N (FIG. 6) and the switch device 35 is turned off, the motor M continues to rotate, and the state shown in FIG. 3 is reached and stopped.

In this embodiment, the case where the conductive plate 4 is attached to one side of the output gear 3 has been described.
The same applies when 11 and 12 are attached and the conductive plate 4 is attached to the fixed surface.

"Effects of the Invention" The present invention has the following effects.

The stop position of the motor is determined by opening / closing the first brush and the semicircular arc-shaped non-conducting portion provided on the conductive plate, and is displayed by blinking a lamp by opening / closing the second brush and the arc-shaped non-conducting portion of the conductive plate. be able to.

A first circuit for opening and closing a motor circuit for detecting a stop position and a lamp circuit for displaying a motor stop position by using a part of a conductive plate
Since the second electric switch is housed in the motor actuator, the operating means of the motor actuator can be simplified and the handling becomes convenient.

The switch position of the operating means for displaying the stop position of the actuator is O only while the output gear in the stopped state is activated.
N is sufficient, and since the mechanism for holding the ON state is not necessary, the configuration is simple and the size and weight can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing the relationship among a motor, a reduction gear group, and an output gear, and FIG. 2 is a plan view of a printed circuit board.
4, 5 and 6 are circuit diagrams showing the respective operating states, and FIG. 7 is a circuit diagram of a conventional actuator. 1 ... motor shaft, 2 ... reduction gear group, 3 ... output gear,
4 ... Conductive plate, 5 ... First non-conducting portion, 6 ... Second non-conducting portion, 7 ... Arc non-conducting portion, 10 ... Common brush, 11 ... First brush, 12 ... Second Brush, 19 ... Printed circuit board, A ... Motor circuit, B ... Printed circuit, C ... First electric switch, D ... Second electric switch, M ... Motor.

Claims (1)

[Scope of utility model registration request] 1. A cutout-shaped first and second non-conducting portion is provided on an outer peripheral edge of a conductive plate provided on one surface of an output gear which is interlocked with a motor shaft through a reduction gear group or on a fixed surface corresponding to the output gear. A concentric semicircular arc-shaped non-conducting portion is formed in an intermediate portion of the output gear, and the conductive plate, a common brush forming a circuit, and the first and second brushes are arranged on a printed circuit board. , The output gear is rotating at a specific stop position or toward the specific stop position, the first and second non-conducting portions and the first brush, and a semi-circular arc-shaped non-conducting portion provided on the conductive plate A motor actuator, characterized in that the conducting plate is used for a part of each of the electric switches formed by the portion, the second brush, and the non-conducting portion and the common brush.