JP3040923B2 - Multi-stage drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage drive device,
For example, the present invention relates to a driving device that is driven by changing the rotation angle in multiple stages, such as a louver of a ventilation fan, a drain valve of a washing machine, and an electric washing mechanism of a flush toilet.

[0002]

2. Description of the Related Art Conventionally, in a mechanism that adjusts the opening in two or multiple stages, such as a louver of a ventilation fan, a motor for rotating and driving the louver includes: It is conceivable to provide detection means such as a limit switch or a proximity sensor for detecting the opening of the louver and a control device for stopping the motor based on a detection signal from the detection means. In this case, an object to be detected such as a dog or a detection plate that is rotated together with the louver is provided on the louver, and a signal for stopping the motor is sent to the control device when the detecting means detects the object to be detected. By transmitting and stopping the motor, the opening of the louver is appropriately adjusted.

[0003]

However, in such a method, it is necessary to provide one detecting means for each of the detected objects, and the structure becomes complicated. The inconvenience that the product unit price increases may be considered. Further, in order to avoid this, when a plurality of detected objects are detected by one detecting means while being identified, there is a disadvantage that a determination circuit in the control device becomes complicated.

The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide a multi-stage drive device capable of adjusting the rotation angle of a rotary shaft in multiple stages with a simple configuration.

[0005]

To achieve the above object, the present invention provides a rotating shaft, a motor for driving the rotating shaft in a single direction, and switching means for switching the rotating angle of the rotating shaft in multiple stages. Wherein the switching means comprises a plurality of terminals forming a plurality of parallel contacts between the motor and its driving power source, and a terminal for selecting a terminal to which the driving power source is to be connected among these terminals. A selection switch, and a contact disconnection mechanism that disconnects each contact according to the rotation angle of the rotating shaft,
The terminal is connected to the drive power supply by the selection switch.
Fixed terminals and operation terminals to be connected, and the motor
And fixed terminals.
Child, with the common terminal and operation terminal, for biasing in a direction to disconnect the contact point between the other terminal to the fixed terminal with superposed on the contact and separation direction of the contacts, which are arranged in superposition direction of the end Biasing means, and a stopper for stopping each terminal at a position where the contact is cut, wherein the contact cutting mechanism disposes step portions having different heights in a circumferentially adjacent state, and It proposes a multi-stage drive unit consisting of a multi-stage cam for displacing the operating pins disposed to an end in the superposing direction according to the height of the step portion.

It is effective if each terminal is constituted by a leaf spring and the biasing means is constituted by an elastic terminal itself.

[0007]

According to the multistage drive device of the present invention, the terminal to which the drive power supply is to be connected is selected from the terminals arranged in parallel between the motor and the drive power supply by operating the selection switch. When the motor is operated, the rotating shaft connected thereto is driven to rotate in a single direction. Since the multi-stage cam is attached to the rotating shaft, the multi-stage cam is also rotated in synchronization with the rotation of the rotating shaft, and an operation terminal arranged on a step portion disposed adjacent to the multi-stage cam in the circumferential direction is a terminal. Are displaced in the direction of superimposition.

Each terminal is urged in a direction to cut off a contact with respect to a fixed terminal disposed at one end in the overlapping direction, so that when the operation terminal is displaced in the overlapping direction, the urging means is pressed. All the terminals are displaced in the overlapping direction by the urging force. Then, when one contact is cut with respect to the fixed terminal, the contact is further prevented from being displaced by the stopper.

Further, when the rotating shaft is further rotated and the operation terminals are arranged on different steps of the multi-stage cam, the operation terminals are displaced in the direction in which the terminals are overlapped. Accordingly, all the terminals except the fixed terminal and the terminal fixed by the stopper are displaced in a direction away from the fixed terminal. As a result, the contact between one terminal fixed by the stopper and the other terminal is cut, and the other terminal is also fixed by the stopper.

In this manner, the contacts of the terminals are sequentially cut in accordance with the position of the step of the multi-stage cam, that is, the rotational angle position of the rotating shaft. Then, when the contact of the terminal to which the driving power supply is connected is cut off, the power supply to the motor is cut off and the motor is stopped, so that the rotating shaft is arranged at the rotation angle position selected by the selection switch. Will be done.

Further, in the above-mentioned multi-stage drive device, if each terminal is constituted by a leaf spring and the biasing means is constituted by an elastic terminal itself, the structure is further simplified and the same function is provided. Can be achieved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a multi-stage driving device according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a multi-stage driving device 1 according to the present embodiment comprises a rotating shaft 2 driven to rotate in one direction, a motor 3 for applying a driving force to the rotating shaft 2, Switching means 4 for switching the rotation angle of the second rotation angle. As shown in FIG. 2, the switching means 4 includes three terminals 8 forming two contacts 6 and 7 between the motor 3 and the driving power source 5.
9 and 10, and a selection switch 11 for switching the terminals 8 and 10 to which the drive power supply 5 is to be connected by the user.

The switching position of the selection switch 11 corresponds, for example, to the opening of a louver of a ventilating fan in one-to-one correspondence. If desired, the drive power supply 5 can be connected to the terminal 10.

The switching means 4 is provided with, for example, a contact disconnecting mechanism 12 for disconnecting power supply to the motor 3 when a desired opening of the louver is achieved. As shown in FIG. 2, the contact cutting mechanism 12 includes a substantially cylindrical multi-stage cam 13 which is integrally attached to the rotating shaft 2 and is rotated with the rotation of the rotating shaft 2. The multi-stage cam 13 has a first concave portion 13a and a second concave portion 13
b.

As shown in FIG. 2, the terminals 8, 9, and 10 are first terminals 8 (fixed terminals) which are fixed at positions spaced apart in the radial direction with respect to the axis of the rotating shaft 2. ) And a common terminal 9 and a second terminal 10 (operation terminal) arranged in a state of being superimposed on the first terminal 8. The first terminal 8 and the second terminal 10 are connected to the selection switch 1.
1, one of which is connected to the drive power supply 5 depending on the state of the selection switch 11. Further, the common terminal 9 is connected to the motor 3.

The common terminal 9 and the second terminal 10 are
One end is composed of a fixed leaf spring, and the other end is swingably disposed. The common terminal 9 is bent in the direction of the first terminal 8 to form the first contact 6 with the first terminal 8, and the second terminal 10 is bent in the direction of the common terminal 9. The second between the common terminal 9
A contact 7 is formed.

Further, the second terminal 10 has its swing end 1
A protruding portion 10b protruding in the center direction of the multi-stage cam 13 is provided near 0a, and the tip of the protruding portion 10b can be brought into contact with the outer surface of the multi-stage cam 13. That is, the second terminal 10 generates a resilient force by being bent by a predetermined dimension, and the resilient force maintains the distal end of the protruding portion 10 b in contact with the outer surface of the multi-stage cam 13.

In the vicinity of the oscillating end 9a of the common terminal 9, a stopper 14 abuts on the oscillating end 9a of the common terminal 9 at a position where the oscillating common terminal 9 is separated from the first terminal 8. Is provided. That is, the common terminal 9 generates an elastic force by being bent by a predetermined dimension, and the first terminal 8 between the common terminal 9 and the first terminal 8 by the elastic force.
The contact 6 is urged in the cutting direction, but when the first contact 6 is cut, further restoring by the elastic force is suppressed by the stopper 14.

The operation of the multi-stage driving device 1 according to the present embodiment having the above-described configuration will be described below. First, when the user sets the opening of the louver by using the selection switch 11, for example, the terminals 8 and 10 to which the driving power supply 5 is to be connected are selected, and the driving power supply 5 is connected to the terminals 8 and 10. Is done. For example, when the louver opening is set to be small, the drive power supply 5 is connected to the first terminal 8 by the selection switch 11 as shown in FIG.

At this time, the rotation shaft 2 is positioned at the rotation angle position shown in FIG.
At a position where the outermost portion 13 is in contact with the outermost periphery 13c of the multi-stage cam 13 (hereinafter, referred to as an initial position). Rotary axis 2
Is located at this initial position, the second terminal 10
The swinging end 10a of the common terminal 9 is made to swing in the direction of the common terminal 9 so that the second contact 7 between the swinging end 10a and the common terminal 9 is brought into contact with the swinging end 10a.
The common terminal 9 and the first terminal 8 are swung in the direction of the terminal 8.
The first contact 6 between them is also arranged in a contact state. This initial state is achieved by, for example, urging the rotating shaft 2 to the original position by a coil spring (not shown) or the like.

Therefore, the driving power supply 5 is connected to the first terminal 8,
The motor 3 is connected to the motor 3 via the first contact 6 and the common terminal 9, and power is supplied to the motor 3 to start rotating the rotary shaft 2. When the rotating shaft 2 is rotated by a predetermined angle, the multi-stage cam 13 is also rotated accordingly, and the first concave portion 13a is moved to the projecting portion 10b of the second terminal 10.
At the rotation angle position matched with the second terminal 10.
Is caused by the resilience of the second terminal 10 itself.
0a is displaced toward the center of the multi-stage cam 13.

As a result, as shown in FIG.
The common terminal 9 whose swing end 9 a is pressed by the terminal 10 also displaces the swing end 9 a with the swing of the second terminal 10, and the first contact 6 between the common terminal 9 and the first terminal 8 is disconnected. Will be done. As a result, the power supply to the motor 3 is stopped, the motor 3 is stopped, and a predetermined louver opening is achieved.

When the user sets a large louver opening, the drive power source 5 is connected to the second terminal 10 by the selection switch 11 as shown in FIG. Since the multi-stage cam 13 is arranged at the initial position,
The circuit passing through the terminal 10, the second contact 7, and the common terminal 9 is closed, and the electric power of the drive power supply 5 is supplied to the motor 3.

When the multi-stage cam 13 is rotated to dispose the protrusion 10b of the second terminal 10 in the first recess 13a, as shown in FIG. 4B, the second terminal 10 and the common terminal 9 are formed. Is swung to make the common terminal 9 and the first terminal 8
Is disconnected. However, the common terminal 9 is still urged by its own resilient force in a direction to keep the second contact 7 with the second terminal 10 in a contact state, so that the power supply to the motor 3 is continued. .

Thereafter, the multi-stage cam 13 is further rotated so that the protrusion 10b of the second terminal 10 is inserted into the second recess 13b.
Is disposed, the second terminal 10 further displaces the swing end 10a. In this case, the swinging end 9a of the common terminal 9 contacts the stopper 14 when the first contact 6 is cut off, and further swinging is restricted.
As shown in (c), when only the second terminal 10 is swung, the second contact 7 with the common terminal 9 is disconnected. Therefore, the rotating shaft 2 is rotated further more than in the above case, and the louver is greatly opened.

After the predetermined rotation angle of the rotating shaft 2 is achieved, the power supply to the motor 3 is stopped. For example, the position of the rotating shaft 1 is changed by a clutch or the like (not shown). It may be maintained for a predetermined time or until the ventilation fan is stopped. Further, when the rotation shaft 2 reaches a predetermined rotation angle, the louver and the rotation shaft 2 may be separated from each other, and only the louver may be kept open. In any case, when the holding force is released, the rotating shaft 2 is restored to the initial position by the coil spring or the like.

As described above, according to the multi-stage driving device 1 according to the present embodiment, the three terminals 8.9 arranged in a superposed state.
With a simple configuration including the ten and the multi-stage cam 13 for swinging these, the rotation angle position of the rotating shaft 2 can be reliably switched in two stages. Therefore, there is no need to use a limit switch or other detection sensors, and the multi-stage driving device 1 can be provided at a low price.

In this embodiment, the case where the multi-stage drive device 1 is applied to a louver of a ventilation fan has been described. However, the present invention can be applied to other arbitrary uses, for example, a flush mechanism of a flush toilet.

Further, by forming each of the terminals 9 and 10 by a leaf spring, an urging means for urging the terminals 9 and 10 in a direction in which the respective contacts 6 and 7 are cut by utilizing the resiliency of the terminals. , But instead of this, for example,
The terminals 9 and 10 are formed in a simple plate shape, and these terminals 9 and
It is good also as composition provided with other urging means, such as a coil spring, in 10 respectively. However, it is preferable to use a leaf spring since no special urging means is required and the number of components can be minimized.

In addition to the case where the rotating shaft 2 is directly connected to the motor 3, the rotating shaft 2 may be rotationally driven while being decelerated via a transmission mechanism such as a gear train or a pulley / belt.

[0032]

As described in detail above, the multi-stage driving device according to the present invention includes a motor for driving the rotating shaft to rotate in a single direction, and switching means for switching the rotating angle of the rotating shaft in multiple stages. Switching means, according to the rotation angle of the rotating shaft, a plurality of terminals forming a plurality of parallel contacts between the motor and its driving power supply, a selection switch for selecting a terminal to connect the driving power supply, It consists of a contact cutting mechanism for cutting each contact Te, the terminals, the driving by the selection switch
Fixed terminal and operation terminal to be connected to power supply, and motor
And a common terminal connected to the
Fixed terminal, common terminal and operation terminal
Child, and biasing means for biasing in a direction to disconnect the contact point between the other terminal with respect to the fixed terminals, and a stopper for stopping the terminals in position contacts are disconnected provided, the contacts cutting mechanism, high Since the steps with different heights are made adjacent to each other in the circumferential direction, and the operation terminal is constituted by a multi-stage cam that is displaced according to the height of the steps,
There is an effect that the rotation angle position of the rotation shaft can be easily and reliably switched to multiple stages without using a special angle detection sensor.

Therefore, such a multi-stage drive device is provided at a low price because of a small number of parts, and can be improved in reliability. Therefore, cost reduction and improvement in maintainability of various devices equipped with the multi-stage drive device can be achieved. Can be.

In the above-mentioned multi-stage drive device, if each terminal is constituted by a leaf spring and the biasing means is constituted by an elastic terminal itself, the number of parts can be further reduced and the structure can be simplified. It has the effect that it can be done.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a multi-stage driving device according to the present invention.

FIG. 2 is a schematic diagram for explaining switching means of the multi-stage drive device of FIG.

3A and 3B are diagrams for explaining an operation when one terminal of the multi-stage driving device of FIG. 1 is selected, wherein FIG. 3A illustrates a case where a selection switch is operated, and FIG. It is explanatory drawing which shows the state which cut | disconnected and the motor stopped.

4A and 4B are diagrams for explaining an operation when another terminal of the multi-stage driving device of FIG. 1 is selected, wherein FIG. 4A illustrates a case where a selection switch is operated, and FIG. (C) is an explanatory diagram showing a state where the second contact is disconnected and the motor is stopped when disconnected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-stage drive device 2 Rotating shaft 3 Motor 4 Switching means 5 Driving power supply 6 First contact (contact) 7 Second contact (contact) 8 First terminal (fixed terminal) 9 Common terminal (terminal) 10 Second terminal (operation terminal) 11) Selection switch 12 Contact disconnection mechanism 13 Multi-stage cam 13a First concave portion (step portion) 13b Second concave portion (step portion) 14 Stopper

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02P 7/00 G05D 3/12

Claims (2)

(57) [Claims] A rotating shaft, a motor for rotating the rotating shaft in a single direction, and switching means for switching the rotation angle of the rotating shaft in multiple stages, wherein the switching means comprises the motor and a power supply for driving the motor. And a plurality of terminals forming a plurality of parallel contacts between them, a selection switch for selecting a terminal to which a drive power supply is to be connected among these terminals, and each contact according to a rotation angle of the rotation shaft. The terminal is connected to the drive power supply by the selection switch.
Fixed terminals and operation terminals to be connected, and the motor
And fixed terminals.
Child, with the common terminal and operation terminal, for biasing in a direction to disconnect the contact point between the other terminal to the fixed terminal with superposed on the contact and separation direction of the contacts, which are arranged in superposition direction of the end Biasing means, and a stopper for stopping each terminal at the position where the contact has been cut, wherein the contact cutting mechanism arranges step portions having different heights in a circumferentially adjacent state, multistage driving apparatus characterized by consisting of a multi-stage cam be displaced in the direction superimposed in accordance with the steering <br/> operation terminals disposed in end to the height of the step portion. 2. The multi-stage driving device according to claim 1, wherein each of said terminals is constituted by a leaf spring, and said biasing means is constituted by an elastic terminal itself.