JPH0822732A - Changeover switch - Google Patents

Abstract

PURPOSE:To provide a changeover switch to perform switching operation so as to prohibit ON of a car air conditioner as long as a fan is not driven by respectively and independently performing plural-stage switching of an air quantity of the fan, ON-OFF of the car air conditioner and plural-stage switching of a combination of inside air circulation or outside air intake. CONSTITUTION:A first rotary piece 5 rotates in a switching system with a central shaft as the center, and performs plural-stage switching of an air quantity of a fan, and a second rotary piece 10 coaxially arranged to the first rotary piece 5 and the central shaft rotates in a switching system with the central shaft as the center, and performs plural-stage switching of a combination of ON-OFF of a compressor 13 and ON-OFF of a switching motor 12 of an intake door for inside air circulation and outside air instake. In this case, in a condition where the fan is stopped by switching to an OFF terminal of the first rotary piece 5, formation of a switch circuit 14 of the second rotary piece 10 is invalidated, and since actuation of a car air conditioner is prohibited, the car air conditioner performs always stable operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a changeover switch, and more particularly to a changeover switch suitable for use in a car air conditioner.

[0002]

2. Description of the Related Art In order to drive and control an air conditioner for an automobile (hereinafter referred to as a car air conditioner), the air volume of a fan is switched in a plurality of stages, the air conditioner is turned on and off, and the inside air circulation or the outside air intake is switched. It is necessary. For this reason, conventionally, a controller of a car air conditioner is provided with an operation switch for switching between cooling and heating and an intensity adjustment, a changeover switch for switching an outlet, an air volume switch for adjusting a fan air volume, an internal air circulation / outside air intake. Ventilation switch for switching and ON / OFF for turning on / off the operation of the air conditioner
The OFF switches are provided separately. In this case, in the control of the car air conditioner, in order to stably drive the air conditioner, a condition circuit that prohibits the air conditioner from being driven even when the ON / OFF switch is turned on is provided with an air volume switch and an ON / OFF switch when the fan is stopped. It is necessary to provide it in between.

Not only in the case of this car air conditioner, generally, the states of a plurality of objects are individually controlled to be switched in a plurality of stages, and unless a certain object is selected, other objects having a specific relationship with the object are selected. In the case of performing switching control under the condition that selection is prohibited, if the switching of a plurality of objects can be performed by the same switch, operability is improved and the device is downsized, which is convenient.

[0004]

To explain this in the case of a controller for a car air conditioner, the controller has recently been strongly demanded to be small and flat, and the operation switch,
Changeover switch, air volume switch, ventilation switch, ON / O
The FF switches are arranged on a narrow operation surface, and the operability is not good. Also, in a car air conditioner, it may be necessary to operate the air volume switch, the ventilation switch, and the ON / OFF switch even while driving in order to keep the air condition inside the vehicle in an optimum state. If the number of switches is large, there will be problems in safe driving.

The present invention has been made on the basis of the current state of the controller of this type as described above.
The purpose of is to independently switch the plurality of stages of the state of the first target and the plurality of stages of the state of the second target independently of each other, unless the first target is selected. It is to provide a changeover switch capable of prohibiting selection.

A second object of the present invention is to switch the air volume of the fan in a plurality of stages and to turn on and off the car air conditioner.
It is an object of the present invention to provide a changeover switch which independently performs a plurality of stages of combination of inside air circulation or intake of outside air and inhibits the turning on of a car air conditioner unless a fan is driven.

[0007]

In order to achieve the first object, the invention according to claim 1 is configured such that switching rotation is performed around a central axis to switch a plurality of stages of a first target state. And a first rotating piece for performing the above-mentioned operation, and the first rotating piece and the first rotating piece are coaxially arranged with respect to the central axis, and are switched and rotated around the central axis to change the state of the second target state. In the switching state of the second rotating piece that performs switching in a plurality of stages and the OFF terminal of the first rotating piece,
And a nullifying unit for nullifying the formation of the switch circuit of the second turning piece.

In order to achieve the second object, the invention according to claim 2 is the invention according to claim 1, wherein the first object is a fan air volume and the second object is a car. It is characterized in that it is a combination of ON-OFF of the air conditioner and circulation of inside air or intake of outside air.

In order to achieve the first object, the invention according to claim 3 is the invention according to claim 1, wherein the prohibiting means connects the first rotating piece and the second rotating piece. It is characterized by being a common guide piece.

[0010]

In the invention described in claim 1 or 3, the first
Of the first rotating piece and the central axis are coaxially arranged with respect to the first rotating piece. The second rotating piece is switched and rotated about the central axis to perform a plurality of stages of switching of the second target state. In this case, in the switching state of the first rotating piece to the OFF terminal, the invalidating means invalidates the formation of the switch circuit of the second rotating body.

According to the second aspect of the present invention, the first rotating piece is switched and rotated about the central axis to switch the air volume of the fan in a plurality of stages, and the first rotating piece and the central axis are switched. On the other hand, the second rotating piece coaxially arranged switches and rotates around the central axis to switch the car air conditioner between ON-OFF and internal air circulation or external air intake in a plurality of stages. Do. in this case,
When the fan is stopped by switching the first turning piece to the OFF terminal, the invalidating means invalidates the formation of the switch circuit of the second turning piece, and the operation of the car air conditioner is prohibited.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a circuit diagram showing the configuration of the present embodiment, and FIG. 2 is a perspective view showing the external configuration of the present embodiment.

In this embodiment, the changeover switch S is used as an operation control switch of a car air conditioner. As shown in FIG. 2, a cylindrical shaft support portion 2 is provided on the front surface of a substantially rectangular casing 1. And a first drive shaft and a second drive shaft are coaxially attached to the shaft support portion 2.
The first knob 3 is fixed to the tip of the drive shaft of the above, and the second knob 4 is fixed to the tip of the second drive shaft. As shown in FIG. 1, a first turning piece 5 that turns by the operation of the first knob 3 is provided, and the first turning piece 5 is grounded. Switching contacts 6a to 6e are provided for
An air volume control motor 8 supplied with a power source E is connected to the switching contact 6d. Between the switching contacts 6a and 6d, resistors 7a to 7 for adjusting the rotation speed of the air volume control motor 8 are provided.
c is connected in series with each other, the switching contact 6b is connected to the connection point of the resistors 7a and 7b, the switching contact 6c is connected to the connection point of the resistors 7b and 7c, and the switching contact 6e is an OFF terminal. . Further, a guide piece 9 is provided, and the rotating piece 5 contacts the guide piece 9 at the switching position with the switching contacts 6a to 6c, and does not contact the guide piece 9 at the switching position with the switching contact 6e. Is configured.

On the other hand, the second knob rotated by the operation of the second knob 4.
The turning piece 10 is provided, and the switching contacts 11a to 11d are provided for the second turning piece 10. The second turning piece 10 switches positions with the switching contacts 11a to 11d. Then, it is always in contact with the guide piece 9. By the way, in the present embodiment, the switching motor 12 for switching the intake door for switching between the internal air circulation and the external air intake, and the compressor 13 for operating the car air conditioner are provided, and the switching motor 12 supplied with the power source E and ON / OFF of the car air conditioner between the compressor 13 and the switching contacts 11a to 11d
And a switch circuit 14 for switching the combination of the inside air circulation and the outside air intake.

The switch circuit 14 includes a switching motor 1
Contact t1 for turning on / off the supply of the power source E to the
ON / OFF of the power supply E to the compressor 13
And a contact point t2 for performing. Contact t1 is ON
In this state, the switching motor 12 is driven and the contact t1 becomes O.
The intake door that is in the outside air intake state in the FF moves to the inside air circulation position. Also, the contact t2 is O
In the state of N, the compressor 13 operates and the car air conditioner is driven. Further, in the switch circuit 14, one ends of the contacts t1 and t2 are connected to the switching motor 12 and the compressor 13, respectively, and the contacts t1 and t2.
Are provided with circuits C1 to C4 whose other ends are connected to each other,
In the circuit C1, the contact t1 is set to OFF and the contact t2 is set to ON, and in the circuit C2, the contact t1 is ON and t2 is OFF.
Is set to ON, and in the circuit C3, the contacts t1 and t2 are both OF
In the circuit C4, the contacts t1 and t2 are both set to O
It is set to N. The switching contacts 11a to 11d are connected to the other ends of the circuits C1 to C4, respectively.

Next, the operation of the embodiment having such a configuration will be described. To adjust the air condition inside the vehicle, operate the operation switch that switches between cooling and heating and adjust the strength in the controller of the car air conditioner (not shown), select cooling and heating in advance, set the strength, and blow. Operate the changeover switch to select the outlet and place it. In this state, the first knob 3 of the changeover switch S is operated to
When the switching contacts 6a to 6d for setting a desired air volume are selected by rotating the rotating piece 5 of No. 1 and the first rotating piece 5 is set on the switching contact, the air volume control motor 8 has a resistance of a predetermined value. Is inserted, the air volume control motor 8 rotates at a predetermined speed,
A desired air volume is set. In this state, the second knob 4 is rotated, and the desired switching contact 11 is rotated by the second rotating piece 10.
The air condition inside the vehicle is adjusted by selecting a to 11d and setting the second rotating piece 10 on the switching contact.

In this case, when the switching contact 11a is selected by the second rotating piece 10, the circuit C1 is connected between the switching motor 12 and the compressor 13 and the switching contact 11a.
In this circuit C1, the contact t1 is OFF and the contact t2 is ON.
Therefore, the switching motor 12 does not operate and the compressor 13 operates, so that the car air conditioner operates according to the operation setting condition of the drive switch, and this operation is performed in the outside air intake state (FRESH), and the outside air is It is taken in and the cooling or heating operation is performed.

Further, the switching contact 1 is provided by the second rotating piece 10.
When 1b is selected, the switching motor 12 and the compressor 1
A circuit C2 is connected between the switch 3 and the switching contact 11b. In this circuit C2, the contact t1 is ON and the contact t2 is OFF, so that the switching motor 12 operates and the compressor 13 does not operate. In this state, the intake door is in the internal air circulation state, and the current air state is maintained in the vehicle.

Further, when the switching contact 11c is selected by the second rotating piece 10, the circuit C3 is connected between the switching motor 12 and the compressor 13 and the switching contact 11c. In this circuit C3, both the contacts t1 and t2 are connected. Since it is turned off, the intake door maintains the outside air intake state, the air conditioner does not operate, and a ventilation state in which the outside air naturally flows into the vehicle is set.

When the switching contact 11d is selected by the second rotating piece 10, the circuit C4 is connected between the switching motor 12 and the compressor 13 and the switching contact 11d. In this circuit C4, both the contacts t1 and t2 are connected. Since it will be ON,
Both the switching motor 12 and the compressor 13 operate, and the car air conditioner operates according to the operation setting condition of the drive switch. This operation is an internal air circulation state (RECYCLE).
The cooling or heating operation is performed in the internal air circulation state.

Further, in the embodiment, when the first turning piece 5 is switched to the switching contact 6e, the first turning piece 5 is brought into a non-contact state with the guide piece 9, and the second turning piece 5 is turned. Since the second rotating piece 10 is not grounded regardless of which of the switching contacts 11a to 11d is switched to the switching contact 11a to 11d, the rotation switching of the second rotating piece is invalidated and the compressor is operated when the fan is not operating. It is prohibited to operate, and stable air conditioner operation is always performed. Particularly, in the embodiment, the turning switching of the second turning piece can be invalidated easily by the guide piece 9 incorporated in the changeover switch without adding an external circuit.

As described above, according to this embodiment, the common changeover switch S is used to switch the fan air flow rate of the car air conditioner in a plurality of stages, and the car air conditioner is turned on and off and the inside air is circulated or the outside air is taken in. It is possible to control the switching of the combination and the operation is simplified, and it becomes possible to perform a safe operation even during operation. Further, the controller of the car air conditioner can be downsized, and the number of parts can be reduced and the manufacturing cost can be reduced.

In the embodiment, the case where the switching between the inside air and the outside air is prohibited when the air volume switch is turned off has been described, but the present invention is not limited to the embodiment and the air volume switch O
At the time of FF, it is possible to prohibit only the drive of the car audio control.

[0024]

According to the first or third aspect of the present invention, the first rotating piece is switchably rotated about the central axis to switch a plurality of stages of the first object. The second turning piece coaxially arranged with respect to the turning piece and the central axis is switched and turned about the central axis to switch the second target in a plurality of stages. It is possible to perform the switching of the plurality of stages of the first target and the switching of the plurality of stages of the second target by a simple operation with a compact configuration using the same switch. Further, in the switching state of the first turning piece to the OFF terminal, the invalidating means invalidates the formation of the switch circuit of the second turning piece, so that the second target is not selected unless the first target is selected. It becomes possible to easily set the operating condition of prohibiting the selection of the target of the above with a single switch. According to the second aspect of the present invention, the first rotating piece is switched and rotated about the central axis to switch the air volume of the fan in a plurality of stages.
The first rotating piece and the second coaxially arranged with respect to the central axis
Since the turning piece of (1) switches and turns around the central axis to switch the ON / OFF of the car air conditioner and the combination of the inside air circulation or the intake of the outside air, a plurality of stages of the air volume of the fan of the car air conditioner can be selected. Switching, switching ON / OFF of the car air conditioner, and switching of multiple stages of combination of inside air circulation or outside air intake can be performed by a simple operation with a compact circuit using the same switch. It will be possible to perform a safe operation. Further, in the fan inoperative state in which the first rotating piece is switched to the OFF terminal, the invalidating means invalidates the formation of the switch circuit of the second rotating piece, so that the car air conditioner does not operate when the fan does not operate. Is easily prevented with a single switch, and the car air conditioner can always be operated in a stable manner.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a perspective view showing an external configuration of the same embodiment.

[Explanation of symbols]

 1 case 3 1st knob 4 2nd knob 5 1st turning piece 6a-6e switching contact 7a-7c resistance 8 air volume control motor 9 guide piece 10 2nd turning piece 11a-11d switching contact 12 switching Motor 13 Compressor

Claims (3)

[Claims] 1. A first rotating piece for switching and rotating about a central axis to switch a plurality of stages of a first target state, and to the first rotating piece and the central axis. And a second rotating piece that is coaxially arranged and that is switched and rotated about the central axis to switch a plurality of stages of a second target state, and the first rotating piece is turned off. A changeover switch comprising: invalidating means for invalidating the formation of the switch circuit of the second rotating piece in the state of switching to the terminal. 2. The air volume of the fan is the first object,
2. The changeover switch according to claim 1, wherein the second object is a combination of ON-OFF of a car air conditioner and internal air circulation or external air intake. 3. The changeover switch according to claim 1, wherein the invalidating means is a common guide piece to which the first rotating piece and the second rotating piece are connected.