JP3185388B2 - Switch position storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch position storage device, and more particularly to a switch position storage device for easily storing a control mode in an air conditioner.

[0002]

2. Description of the Related Art For example, in an air conditioner, when a switch is depressed, a switch (O) is turned on to switch an air volume, an air inlet, an air outlet, and operation / stop of the air conditioner.
N) and then open (OF) by pressing this switch or by pressing another switch associated with this switch.
F) A locking switch is used. Since the lock-type switch is kept in the conducting position, when the operation is started, the control mode at the time when the previous operation was stopped is automatically started. Further, by turning on a light emitting diode (LED) in conjunction with the lock type switch, the driver can visually recognize the control mode at that time.

As another changeover switch, there is used a self-returning momentary switch which conducts only when the switch is pressed and opens when released. According to this momentary switch, the control mode of the air conditioner at the time of the previous stop of operation cannot be mechanically stored and held because the switch is ON only while the switch is being pressed. At the time of restart, it cannot be determined which control mode is in. Therefore, it is necessary to store the control mode.
As disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, there is a type in which a control mode when the engine is stopped is stored in a microcomputer by a backup power supply requiring a small current, and the microcomputer is started in the next operation in the stored control mode.

[0004]

The above-mentioned conventional lock-type switch cannot be used in an environment where the amount of dust is large because dust may enter through a gap between the switches and cause a failure. There's a problem. Therefore, it is possible to prevent dust from entering through gaps between the switches by covering the panel on which the changeover switches are arranged with a flat flat sheet. However, when such a flat sheet is used, the depth (stroke between the conduction position and the open position) at which the lock-type switch can be pressed cannot be set to a necessary distance, and thus the lock-type switch is used. Can not do.

A self-returning momentary switch can be used even on a panel covered with a flat sheet, since conduction and opening can be performed in a short stroke, but this momentary switch is always open. Yes, it becomes conductive only when the switch is pressed. Therefore, when the momentary switch is used, it is necessary to store the previous control mode in the microcomputer by the backup power supply. Since a backup power supply is required to store the previous control mode in the microcomputer, there is a problem that an extra power supply is required and a problem that the cost is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a switch position storage device capable of storing a control mode without using a backup power supply without causing any trouble due to dust.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a self-return type switch which closes an electric circuit by receiving a pressing force and opens the electric circuit by releasing the pressing force. A cover member that covers an outer periphery of the switch and is displaced together with the switch by receiving the pressing force, a plurality of contacts made of a conductor, potential applying means for applying a constant voltage to one of the contacts, Conducting means comprising a conductor which is displaced between a conducting position where the contact is provided with another contact and a non-conducting position where the contact and the other contact are made non-conductive, and the switch A driving means for displacing the conducting means in accordance with the conduction of the detecting means, a detecting means for detecting the potential of the other contact, and an output for judging and outputting the position of the conducting means based on the potential detected by the detecting means. means , And adopts the switch position storage device comprising a.

[0008]

According to the switch position storage device of the present invention having the above-described structure, a self-returning type switch is used which closes an electric circuit by receiving a pressing force and opens the electric circuit by releasing the pressing force. A plurality of contacts made of a conductor are provided, and a constant voltage is applied to one of the contacts by a potential applying means. Conducting means for displacing a position between a contact applied with the given voltage and another contact and a non-conductive position for bringing the contact and the other contact into a non-conductive state are provided. The driving means displaces the conducting means in accordance with the conduction of the switch, and drives the conducting means to the conducting position or the non-conducting position.

If the potential of the contact is detected by the detecting means,
Based on the potential detected by the detecting means, it is possible to determine whether the position of the conducting means is in the conducting position or in the non-conducting position and output the result. That is, the state of the switch can be stored based on the position of the conduction unit.

Further, since the self-returning type switch is covered with its outer periphery and the switch is covered by a cover member which is displaced together with the switch by receiving a pressing force, dust and the like do not enter through the gap of the switch. Since the self-returning type switch can be turned on and off in a short stroke, it can be used even if it is covered by a cover member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the switch position storage device of the present invention is used in an air conditioner of a construction machine vehicle used under conditions with much dust and the like will be described below with reference to the drawings.

FIG. 1 shows an example of a vehicle air conditioner according to the present invention. This air conditioner has an air duct (outlet) 10 mounted on a vehicle.
In the upstream part of the “0”, an inside / outside air switching damper 17, a blower 18, an evaporator 19, an air mix damper 20, and a heater core 21 are arranged from the upstream to the downstream.

The inside / outside air switching damper 17 is a servo motor 1
Under the drive by 7a, outside air flows into the air duct 10 from the inlet 11 or flows into the air duct 10 via the inlet 12 depending on the opening degree.

The blower 18 has a blower controller 18a.
According to the rotation speed of the blower motor M driven by the air blower, at least one of the outside air from the inlet 11 and the inside air from the inlet 12 is blown toward the evaporator 19 as an air flow. The evaporator 19 cools the airflow from the blower 18 with the refrigerant circulating according to the operation of the refrigeration cycle of the air conditioner.

The air mix damper 20 is driven by a servomotor 20a, and according to its opening degree, the air flow passing through the evaporator 19 flows into the heater core 21 and the upper outlet duct 10a bypassing the heater core 21.
And the air flowing directly into it. Air duct 10
The downstream part is composed of an upper outlet duct 10a and a lower outlet duct 1
In the air mixing chamber 13 on the downstream side, the air bypassing the heater core 21 and the air passing through the heater core 21 are mixed.

As shown in FIG. 1, the heater core 21 is inclined at the inner end of the lower blow-out duct 10b, and the heater core 21 is provided with the actual cooling water from the engine cooling system of the vehicle. In accordance with the temperature, the inflow cooling air flow is heated and flows into the lower blow duct 10b.

As shown in FIG. 1, the outlet switching damper 22 is rotatably disposed downstream of the air mix chamber 13. The outlet switching damper 22 is formed by a rotary damper having an arc-shaped cross section and a ventilation hole 22c through which an air flow passes in a part thereof, and is driven by a servo motor 22a to rotate the center shaft 22b. It rotates according to the rotation. With this rotation, the vent hole 22c of the outlet switching damper 22 moves, and the upper outlet 15 that blows out toward the upper part of the occupant and the lower part that blows out toward the lower part of the occupant according to the location of the vent hole 22c An airflow is blown into the vehicle cabin from one of the outlet 16 and the defroster blowout port 14 that blows out toward a windshield provided on the front of the vehicle.

FIG. 3 shows an operation panel 24 on which an occupant of the vehicle operates the air conditioner. The operation panel 24 is provided on the instrument panel in front of the driver's seat in the vehicle cabin. Operation panel 2
4 includes an air conditioner switch 25, an off switch 26, an inside air suction switch 27, an outside air suction switch 28, air volume setting switches 29, 30, 31 and outlet temperature setting devices 32, 3
3, indicator 34, upper outlet setting switch 35,
A lower outlet setting switch 36 and a defroster outlet setting switch 37 are provided.

The air conditioner switch 25 switches the operation / stop of the air conditioner by switching the operation / stop of a compressor (not shown) constituting the refrigeration cycle of the air conditioner. The off switch 26 stops the operation of the blower controller 18a that drives the blower 18, and stops the operation of the air conditioner. The inside air suction switch 27 switches the position of the inside / outside air switching damper 17 of the vehicle to the outside air suction port 11 side, and allows inside air in the vehicle compartment to flow. The outside air suction switch 28 is connected to the inside / outside air switching damper 1 of the vehicle.
The position 7 is switched to the inside air suction port 12 side to allow outside air to flow into the vehicle interior.

The air volume setting switches 29, 30, and 31 are switches for setting the air volume from the blower 18 to low, medium, or high, respectively. The blowout temperature setting devices 32 and 33 are switches for adjusting the temperature of the blown air blown out from the upper blowout port 15, the lower blowout port 16, and the defroster blowout port 14, and a cool switch 3 for lowering the temperature.
2 and a warm switch 33 for raising the temperature.
The indicator 34 provided above the outlet temperature setting devices 32 and 33 is composed of a light-emitting diode (LED) that allows the occupant to visually recognize the current temperature state.

When the upper air outlet setting switch 35 is pressed, the servo motor 22a drives the air outlet switching damper 22 to bring the air vent hole 22c to a position corresponding to the upper air outlet 15. Blows the air toward the passenger compartment. When the lower outlet setting switch 36 is depressed, the servo motor 22a drives the outlet switching damper 22 so that the lower
2c is located at a position corresponding to the lower outlet 16, and the outlet air is blown from the lower outlet 16 toward the vehicle interior. By pressing this switch 37, the defroster outlet setting switch 37 switches the outlet switching damper 22 to the servo motor 2.
2a is driven to set the ventilation hole 22c at a position corresponding to the defroster outlet 14, and the blown air is blown from the defroster outlet 14 toward the vehicle interior. In addition, above each switch, an indicator indicating each operation state is provided,
The state of each switch is shown.

The above switches are constituted by self-returning momentary switches, and the air flow rate setting switches 29, 30,
31 is a set, operates only in one of the modes, and the indicator 29a, 30a, 31a is also one of the ones corresponding to the air volume setting switches 29, 30, 31 at that time.
Only one light. Each switch of an inside air suction switch 27 and an outside air suction switch 28, an upper air outlet setting switch 35, a lower air outlet setting switch 36, and a defroster air outlet setting switch 37 is also a set. Only operates in one of the two modes, and only one of the corresponding indicators lights up.

On the front surface of the operation panel 24, a thin flat sheet 3 made of elastic resin is provided.
An arrangement 8 is provided to cover each switch so that dust does not enter into each switch.

The configuration of the servomotor 17a for driving the inside / outside air switching damper 17 will be described with reference to FIG. As shown in the drawing, a rectangular first short contact 42 and a long second contact 43 in the form of a flat plate made of an electric conductor are arranged in parallel with one end thereof aligned at an interval. A terminal 44 made of a conductor is orthogonal to the first contact 42 and the second contact 43, and the second contact 43 is moved from the first mode 45 on one end to the second contact on the other end.
Up to a mode 46, a parallel movement is provided between the contacts.
The terminal 44 is connected to the first mode 45 in the first mode 45.
The connection between the contact 42 and the second contact 43 is conducted, and the second mode 46
, The first contact 42 is opened. The servomotor 17a drives the inside / outside air switching damper 17 and also drives the terminal 44. The servo motor 17a is driven when a high-level voltage, which is a high voltage, is applied to one terminal and a low-level voltage, which is a low voltage, is applied to the other terminal. When a voltage is applied to the opposite terminal, it is driven in the opposite direction. These servo motors 17a, contacts 42, 43,
The terminal 44 constitutes a motor unit 41 that is involved in storing the control mode of the inside / outside air switching damper 17.

A control section 40 for controlling the servomotor 17a is connected to the motor section 41 via terminals A, B, C and D. Terminal A and terminal B indicate terminals of a relay connected to both poles of the servomotor 17a, terminal C indicates a terminal connected to the first contact 42, and terminal D
Indicates a terminal connected to the second contact. Terminal D
Are grounded (earthed).

The control unit 40 includes an inside air suction switch 27 and an outside air suction switch 28 on the operation panel 24 of the air conditioner shown in FIG.
An indicator 28a is provided.

When the inside air suction switch 27 is pressed, a high-level (H) voltage is output to the terminal A and a low-level (L) voltage is output to the terminal B. Then, the servo motor 17a
Is operated to drive the inside / outside air switching damper 17 so as to close the outside air introduction port 11 and open the inside air introduction port 12, thereby introducing inside air into the vehicle interior. At the same time, the terminal 44 is driven to the first mode 45 by the servo motor 17a. Further, the indicator 27a disposed above the inside air suction switch 27 is turned on so that the occupant of the vehicle can visually recognize that the inside air suction mode is set.

Conversely, when the outside air suction switch 28 is pressed, a high-level voltage is output to the terminal B and a low-level voltage is output to the terminal A. By the operation of the servomotor 17a, the inside / outside air switching damper 17 is driven so as to close the inside air introduction port 12 and open the outside air introduction port 11, thereby introducing outside air into the vehicle interior. At the same time, the terminal 44 is driven to the second mode 46 by the servo motor 17a. The indicator 28a disposed above the outside air suction switch 28 is turned on so that the occupant of the vehicle can visually recognize that the outside air suction mode is set.

The switches 27 and 28 are operated only when they are continuously pressed for about 0.1 second or more in order to prevent malfunction due to noise. Next, the initial setting of the indicators 27a and 28a, which indicate whether the inside / outside air switching damper 17 is in the inside air suction mode or the outside air suction mode, at the start of vehicle operation will be described.

At the start of vehicle operation, the inside / outside air switching damper 17 is used to make the occupant visually recognize which of the inside air suction mode and the outside air suction mode the vehicle is in.
7. One of the indicators 27a, 28a provided above both of the outside air suction switches 28 is turned on for the corresponding one of the indicators 27a, 28a.

When the terminal 44 is in the first mode 45 side, the voltage at the terminal C is at a low level (0 V) because the first contact 42 is electrically connected to the grounded second contact 43. Further, when the terminal 44 is in the second mode 46, the first contact 42 and the second contact 43 are not conducting, that is, since the first contact 42 and the second contact 43 are not conducted by the terminal 44, the terminal C is not connected. Is in an open state and is determined to be at a high level.

By the determination of the voltage at the terminal C, the mode of the inside / outside air switching damper 17 is determined at the time of starting. Next, the operation of the initialization at the time of starting the engine in this air conditioner will be described with reference to the flowchart shown in FIG.

When the ignition key 47 for starting the engine of the vehicle is turned on, the control unit 40 is supplied with power from the battery Ba, and in step 100, the control of the initial setting of the air conditioner is started.

At step 110, it is detected whether the voltage of the terminal C is at a high level or a low level (0 [V]). In step 120, it is determined whether or not the voltage of the terminal C detected in step 11 is at a low level.

When the voltage of the terminal C is at the low level, the judgment is "YES", and the routine goes to step 130. When the voltage of the terminal C is at a high level, it is determined as “NO”,
Move to step 150.

In step 130, since the voltage of the terminal C is at the low level, it is determined that the inside air suction mode is set, and the indicator 27a arranged above the inside air suction switch 27 is set.
Lights up.

In the next step 140, a high-level voltage is output to the terminal A and a low-level voltage is output to the terminal B to drive the servomotor 17a, and the inside / outside air switching damper 17 is driven.
Is driven toward the outside air suction port 11 to allow air to flow through the inside air suction port 12. As an output voltage used for driving the inside / outside air switching damper 17, a power supply voltage allocated to the vehicle is output. Specifically, a voltage of 12 [V] is output as a high-level voltage for passenger cars and a voltage of 24 [V] for a large-sized vehicle, and a voltage of 0 [V] is output as a low-level voltage. Then, control goes to the next step 170.

On the other hand, in step 150, since the terminal voltage of the terminal C is at the high level, it is determined that the air is in the outside air suction mode, and the indicator 28a disposed above the outside air suction switch 28 is turned on.

In the next step 160, a low-level voltage is output to the terminal A and a high-level voltage is output to the terminal B to drive the servomotor 17a.
Is driven toward the inside air suction port 12 to allow air to flow from the outside air suction port 11. Then, the process proceeds to step 170.

When the process proceeds from step 140 and step 160 to step 170, the control of the initial setting is completed. As described above, even when the momentary switch is used, the control mode of the air conditioner at the time of the previous operation can be determined from the terminal voltage based on the contact signal in the servomotor 27a, and the initial setting can be performed.

Next, the configuration of the servomotor 22a for driving the outlet switching damper 22 will be described with reference to FIG. As shown in the figure, a flat first contact 7 made of a conductor
2, the second contact 73, the third contact 74, and the fourth contact 75
Are arranged in parallel at intervals. The contact 72 is grounded. Conductor terminals 76 connect these contacts 72, 73,
The terminals 76 are arranged so as to be movable in the longitudinal direction of the respective contacts at right angles to the contacts 74 and 75, and the terminals 76 conduct between desired contacts according to the positions thereof. The terminal 76 provides a first mode 77 for conducting the contact 72 and the contact 73, a second mode for conducting the contact 72 and the contact 75, and a third mode for conducting the contact 72 and the contact 74. These servo motors 22a, contacts 72, 73, 74, 75,
The motor unit 71 that is involved in storing the control mode of the outlet switching damper 22 from the terminal 76 includes a control unit 70 that controls the servo motor 22a, and includes a terminal A, a terminal B, a terminal C, and a terminal. D, terminal E, and terminal F are connected. Terminal A and terminal B indicate terminals of a relay connected to both poles of the servomotor 22a. Terminal C indicates a terminal connected to the fourth contact 75, terminal D indicates a terminal connected to the second contact, terminal E indicates a terminal connected to the third contact, and terminal F indicates a terminal connected to the first contact. Are shown.

The controller 70 includes an upper outlet setting switch 35, a lower outlet setting switch 36, a defroster outlet setting switch 37 on the operation panel 24 of the air conditioner shown in FIG. 36a and an indicator 37a are provided. In addition, the control unit 70 controls the ignition switch 47
Connected to the battery Ba, and operates by being supplied with power from the battery Ba.

Each of the terminals A, B, C, and D is determined to be at a low level when the potential of the corresponding contact is 0 [V], and when the potential of the corresponding contact is not 0 [V], Judge as high level. When the terminal 76 is in the first mode 77, the contact 73 is electrically connected to the grounded contact 72, so that the potential of the contact 73, that is, the potential of the terminal D becomes low level. At this time, the potentials of the terminals C and E are at a high level. When the terminal 76 is in the second mode 78,
Since the contact 75 is electrically connected to the contact 72, the potential of the terminal C is at a low level, and the potentials of the terminals D and E are at a high level. When the terminal 76 is in the third mode 79, the potential of the terminal E is at a low level because the contact 74 is electrically connected to the contact 72, and the potentials of the terminals C and D are at a high level. Since the terminal F is grounded, it is always at a low level.

When the upper outlet setting switch 35 is pressed, the controller 70 applies a voltage to the terminals A and B to drive the servomotor 22a, thereby driving the outlet switching damper 22. By this driving, the ventilation hole 22c of the outlet switching damper 22 is
It corresponds to the position of the upper outlet 15. The terminal 76 is driven together with the drive of the outlet switching damper 22 to drive to the position of the second mode. At this time, the indicator 35a provided above the upper outlet setting switch 35 is turned on so that the occupant of the vehicle can visually recognize which mode is currently being controlled.

When the lower outlet setting switch 36 is pressed, the controller 70 applies a voltage to the terminals A and B to drive the servomotor 22a, thereby driving the outlet switching damper 22. By this driving, the ventilation hole 22c of the outlet switching damper 22 is
It corresponds to the position of the lower outlet 16. The terminal 76 is driven together with the driving of the outlet switching damper 22 to drive to the position of the third mode. At this time, an indicator 36a provided above the lower outlet setting switch 36 is turned on.

When the defroster outlet setting switch 37 is pressed, the controller 70 applies a voltage to the terminals A and B to drive the servo motor 22a, thereby driving the outlet switching damper 22. By this driving, the ventilation hole 22 of the outlet switching damper 22
c is made to correspond to the position of the defroster outlet 14. By driving the terminal 76 together with the driving of the outlet switching damper 22,
Drive to the position of the first mode. At this time, an indicator 37a provided above the defroster outlet setting switch 37 is turned on.

When a high-level voltage is applied to the terminal A and a low-level voltage is applied to the terminal B, the servomotor 22a for driving the outlet switching damper 22 and the terminal 76, as shown in FIG. Driving is performed so that the ventilation hole 22c moves toward the lower outlet 16 side, and at the same time, the terminal 76 is driven so as to move from the first mode side to the third mode side. When a low-level voltage is applied to terminal A and a high-level voltage is applied to terminal B, in FIG.
Is driven in the direction in which the ventilation hole 22c moves toward the defroster outlet 14, and at the same time, the terminal 76 is driven to move from the third mode side to the first mode side.

The servo motor 22a is driven based on the terminal voltage of each of the contacts 73, 74, and 75 which changes at the terminal 76, that is, the potential of the terminals D, E and C. For example, to blow air from the defroster outlet 14 into the vehicle interior, the controller 70 drives the servomotor 22a and
6 is in the first mode 77, when it is determined that the potential of the terminal C is at the high level and the potential of the terminal D is at the low level, the driving of the servomotor 22a is stopped. At this time, the outlet switching damper 22 is being driven at the same time, and the ventilation hole 22 c is at a position corresponding to the defroster outlet 14.

To blow air into the passenger compartment from the upper outlet 15, the controller 70 drives the servomotor 22a and
6 is located in the second mode 78, and when it is determined that the potential of the terminal C is at the low level, the potential of the terminal D is at the high level, and the potential of the terminal E is at the high level, the driving of the servomotor 22a is stopped. . At this time, the outlet switching damper 22 is being driven at the same time, and the ventilation hole 22c is
At a position corresponding to

To blow air from the lower outlet 16 into the vehicle interior, the controller 70 drives the servomotor 22a to
6 is located in the third mode 78, when it is determined that the potential of the terminal C is at the high level and the potential of the terminal E is at the low level, the driving of the servomotor 22a is stopped. At this time, it is assumed that the outlet switching damper 22 is being driven at the same time, and the vent hole 22c is at a position corresponding to the lower outlet 16.

Next, the operation of initial setting of the air outlet at the time of engine start in this air conditioner will be described with reference to the flowcharts shown in FIGS. When the ignition key 47 for starting the engine of the vehicle is turned on, control for initial setting of the air conditioner is started in step 200.

In step 210, it is detected whether the voltage of each of the terminals C, D and E is at a high level or a low level (0 [V]). Step 220
Then, it is determined whether or not the voltage of the terminal C detected in step 210 is at a low level (0 [V]).

When the voltage of the terminal C is at the low level, "YES" is determined, and the routine proceeds to step 230, where the terminal C
When the voltage is not at the low level, that is, when it is at the high level, the process proceeds to the next step M.

In step 230, it is determined whether the potential of the terminal D is at a high level or at a low level. "YES" when the potential of the terminal D is low level
It proceeds to step 240. When the potential of the terminal D is at a high level, it is determined as “NO” and
Move to 50.

In step 240, when both the terminals C and D are at the low level, that is, when the terminal 76 is in the first mode 77
When the contact 76 is located between the first mode 77, the second mode 78, and the third mode 79, the state shifts to this state. Never be. However, when the ignition key 47 is turned off immediately after the switches 35, 36, and 37 for switching the outlet are pressed, the servomotor 22a is being driven, and the position corresponding to each mode 77, 78, 79 is set. Instead, it may stop on the way. At this time, it is not possible to determine which of the first mode 77 and the second mode 78 the mode is being shifted to. Therefore, the servo motor 22a is driven toward the second mode 78 blown out from the upper outlet 15 uniquely. , The terminal C is at a low level, the terminal D is at a high level, and the terminal E is at a high level.
Then, the process proceeds to step 270.

In step 250, it is determined whether the potential of the terminal E is at a high level or a low level. "YES" when the potential of the terminal E is low level
It proceeds to step 260. When the potential of the terminal E is at a high level, it is determined as "NO" and
Move to 70.

When "NO" is determined in step 250, the terminal C is at the low level, the terminal D is at the high level, the terminal E is at the high level, and the terminal 76 is in the second mode 78. .

In step 260, when both the terminals C and E are at the low level, that is, when the terminal 76 is in the second mode 78
The state shifts when it is located between the second mode 79 and the third mode 79.
At this time, as in step 240, the servo motor 22a is moved toward the second mode 78 that blows out from the upper outlet 15.
Is driven until the second mode 78 in which the potential of the terminal C is at the low level, the potential of the terminal D is at the high level, and the potential of the terminal E is at the high level. And step 2
Move to 70.

In step 270, since the terminal 76 is located in the second mode 78 and blows out from the upper outlet 15 toward the vehicle interior, the terminal 76 is provided above the upper outlet setting switch 35 on the operation panel 24. Indicator 3
5a is turned on so that the occupant of the vehicle can visually recognize that air is being blown from the upper outlet 15.

At step 220, “NO” is determined,
When the process proceeds to step M, as shown in FIG. 7, the process proceeds to step 300 to determine whether the potential of the terminal D is at a low level or at a low level. When the potential of the terminal D is at the low level, “YES” is determined, and the process proceeds to step 310. When the potential of the terminal D is at the high level, “NO” is determined and the process proceeds to step 320.

In step 310, the terminal C is at a high level,
Terminal D is at low level and terminal 76 is in first mode 77
It is time to be located. At this time, the defroster outlet 1
4, an indicator 37 a provided above the defroster outlet setting switch 37 is illuminated on the operation panel 24 so that the vehicle occupant can visually check the state. Then, the process proceeds to step N.

In step 320, the terminal C is at a high level,
Terminal D is at a high level, and terminal 76 is in a third mode 79.
It is time to be located. At this time, the air is blown from the lower air outlet 16 toward the vehicle interior, and an indicator 36a provided above the lower air outlet setting switch 36 on the operation panel 24 so that the vehicle occupant can visually recognize the state.
Lights up. Then, the process proceeds to step N.

As described above, step 270, step N
Is completed, the process proceeds to step 280, and the control of the initial setting is completed. With such a configuration, three types of control modes can be stored.

Next, another embodiment will be described with reference to FIG. As shown in FIG.
A flat second contact 53, a flat short third contact 54, a flat short fourth contact 55, a flat short fifth contact 56,
Sixth flat short contact points 57 are arranged in parallel at intervals. The contact 52 is grounded. These contacts 52,
Terminals 58 are provided so as to be movable in the longitudinal direction of the respective contacts in a direction perpendicular to 53, 54, 55, 56, 57, and to conduct between desired contacts according to the positions. A first mode 60 in which the first contact 52 and the second contact 53 are electrically connected by the terminal 58, a first mode 52 in which the first contact 52, the second contact 53 and the third contact 5
4, a third mode 62 for conducting between the first contact 52, the second contact 53, the third contact 54, and the fourth contact 55; a first mode 52 for conducting the first contact 52 and the second contact 53; A fourth mode 63 for conducting the fourth contact 55, a fifth mode 64 for conducting the first contact 52 and the fifth contact 56,
A sixth mode 65 for conducting the first contact 52, the sixth contact 57, and the fifth contact 56, a seventh mode for conducting the first contact 52 and the sixth contact 57, and other modes using only the first contact 52. And an eighth mode in which the contacts are not conducted. These servo motors 17a and contacts 52, 53, 54, 55, 5
6, 57 and the terminal 58, the inside / outside air switching damper 1
The motor unit 51 involved in storage of the control mode 7 is configured.

A control section 50 for controlling the servomotor 17a is connected to the motor section 51 via terminals a, b, c, d, e and f. Terminals a and b indicate terminals of a relay connected to both poles of the servomotor 17a. Terminal c indicates a terminal connected to the fourth contact 55 and the fifth contact 56, terminal d indicates a terminal connected to the third contact 54 and the sixth contact 57, and terminal e indicates a terminal connected to the second contact 53. The terminal and the terminal f indicate the terminal connected to the first contact.

In the above-described servo motor 17a for driving the inside / outside air switching damper 17, the servo motor 17a moves in the areas A, B, and C. These areas A, B,
In C, the inside / outside air switching damper 17 is driven only for driving the servomotor 17a in the range of the region C, and is not driven for driving the servomotor 17a in the range of the regions A and B. Only a link mechanism provided with a dead body (idling) that is driven.

The air conditioner switch 25, the off switch 26, the inside air suction switch 27, and the outside air suction switch 2 on the operation panel 24 of the air conditioner shown in FIG.
8, an air volume setting switch 30 and indicators 25a, 27a, 28a, 30a indicating the status are provided. Further, the control unit 50 controls the ignition switch 47
Is connected to the battery Ba.
It operates by being supplied with power from a.

Each of the terminals c, d, and e is determined to be at the low level when the potential of the corresponding contact is 0 [V], and is determined to be at the high level when the potential of the corresponding contact is not 0 [V]. Is determined to be.

When the terminal 58 is in the first mode 60, the contact 53 is electrically connected to the grounded contact 52.
The potential of the contact 53, that is, the potential of the terminal e becomes low level.
At this time, the potentials of the terminals c and d are at the high level.

When the terminal 58 is in the second mode 61, the contacts 53 and 54 are electrically connected to the contact 52, so that the potentials of the terminals d and e are low, and the potential of the terminal c is high. is there.

When the terminal 58 is in the third mode 62, the potential of each of the terminals c, d, and e becomes low because the contact 53, the contact 54, and the contact 55 conduct with the contact 52.
When the terminal 58 is in the fourth mode 63, the potentials of the terminals c and e are low and the potential of the terminal d is high because the contacts 53 and 55 are electrically connected to the contact 52.

When the terminal 58 is located in the fifth mode 64, the potential of the terminal c is at a low level because the contact 56 is electrically connected to the contact 52, and the potential of the terminal d and the terminal e is at a high level.

When the terminal 58 is in the sixth mode 65, the contacts 56 and 57 are electrically connected to the contact 52, so that the potentials of the terminals c and d are low and the potential of the terminal e is high. is there.

When the terminal 58 is in the seventh mode 66, the contact 57 is electrically connected to the contact 52, so that the potential of the terminal d is low, and the potentials of the terminals c and e are high.

When the terminal 58 is in the eighth mode 67, the terminals c, d,
The potential of e is at a high level. As described above, it is possible to determine which mode is in accordance with the potential of each terminal. In each of the terminals c, d and e, the terminal c switches between a low level and a high level in accordance with the ON / OFF of the air conditioner switch 25, and the terminal d switches the air volume setting switches 29, 3
A low level and a high level are switched in response to ON / OFF of the blower 18 by 0 and 31, and a terminal e switches between a low level and a high level corresponding to the inside air suction switch 27 and the outside air suction switch.

For the air conditioner switch 25, a low level corresponds to the on state, and a high level corresponds to the off state.
It is assumed that a low level corresponds to a blowing (ON) state and a high level corresponds to a non-blowing (OFF) state. The low level corresponds to the inside air suction switch 27, and the high level corresponds to the outside air suction switch 28.

According to this configuration, for example, when the inside air is sucked, the blower 18 is turned on, and the air conditioner is turned off,
The servo motor 17a is driven so that the terminal 58 is located in the second mode 61.

In driving the terminal 58 in each mode, the terminal 58 is driven by the servo motor 17a in the target mode direction, and the control unit 50 determines from the potentials of the terminals c, d, and e that the mode is the target mode. It is assumed that it is driven until

It should be noted that instead of switching the inside / outside air switching damper 17, the air conditioner switch 25 and the off switch 2
6. When the air conditioner is turned on / off and the blower 18 is turned on / off by the air volume setting switch 30, the terminal 58 is driven only in the area A or the area B to switch the mode. At this time, as described above, the terminal 58 is driven from the potentials of the terminals c and d until a terminal voltage corresponding to each mode is reached as shown in FIG.

When driving the inside / outside air switching damper 17, for example, when switching to the outside air suction mode when the terminal 58 is located in the area A in the inside / outside air suction mode, the terminal 58 is moved to the area B side for a predetermined time. To the eighth mode 67. Thereafter, in order to maintain the potentials of the terminals c and d before the movement, the terminal 58 is driven toward the region c until the terminal potential becomes the same as that of the previous mode.

Since the terminal 58 is normally driven in the areas A and B, the terminal 58 does not stop in the area C. However, the inside / outside air switching damper is controlled by the inside air switch 27 or the outside air switch 28. When the ignition switch 47 is turned off immediately after driving the motor 17, the terminal 58 is set in the area C while the servo motor 17 a is driving.
May stop.

Therefore, when the potentials of the terminals c and d are simultaneously at the high level, the first mode 60 and the eighth mode 6
7 or area C, it is not possible to determine
In this state, the state of the inside / outside air switching damper 17 is determined based on the potential of the terminal e, and the state is driven for a predetermined time toward the corresponding first mode 60 and eighth mode 67, and the first The air conditioning control is started in either the mode 60 or the second mode 67.

Next, the operation of initial setting of the air outlet at the time of engine start in this air conditioner will be described with reference to the flowchart shown in FIG. When the ignition key IG for starting the engine of the vehicle is turned on, step 40
At 0, the control of the initial setting of the present air conditioner is started.

In step 410, it is detected whether the potential of each of the terminals c, d and e is at a high level or a low level. In the next step 420, it is determined whether or not the potential of the terminal c detected in step 410 is at a low level. When the potential of the terminal c is low level, the determination is “YES” and the process proceeds to step 430. When the potential of the terminal c is not low level, that is, when the potential of the terminal c is high level, “NO” is determined and step 440 is performed.
Move to

Step 430 is performed when the potential of the terminal c is at the low level. At this time, it is determined that the air conditioner switch 25 was in the ON state during the previous operation of the vehicle.

Step 440 is performed when the potential of the terminal c is at the high level. At this time, it is determined that the air conditioner switch 25 was turned off during the previous operation of the vehicle.

In the next step 450, step 410
It is determined whether or not the potential of the terminal d detected at is low level. When the potential of the terminal d is at the low level, "YES" is determined and the process proceeds to step 460, where the terminal d
When the potential of is high, the determination is "NO" and the routine goes to step 470.

Step 460 is performed when the potential of the terminal d is at the low level. At this time, the blower 18 is operated by one of the air volume setting switches 29, 30, and 31 during the previous operation of the vehicle. Judge that

Step 470 is performed when the potential of the terminal d is at the high level. At this time, it is determined that the operation of the blower 18 has been stopped by the off switch 26 during the previous operation of the vehicle. In the next step 480, it is determined whether or not the potential of the terminal e detected in step 410 is at a low level. When the potential of the terminal e is at the low level, "YES" is determined and
0, and when the potential of the terminal e is at the high level, “NO” is determined and the process proceeds to step 500.

Step 490 is performed when the potential of the terminal e is at the low level. At this time, it is determined that the inside / outside air switching damper 17 was in the inside air mode during the previous operation of the vehicle.

Step 500 is performed when the potential of the terminal e is at the high level. At this time, it is determined that the inside / outside air switching damper 17 was in the outside air mode during the previous operation of the vehicle.

In the next step 510, the indicators 25a, 27a, 28a and 30a indicating the respective states are turned on based on the respective states determined as described above. Further, based on each determined state, the compressor (not shown) and the blower 18 are operated, and the inside / outside air switching damper 17 is operated toward the corresponding mode.

Then, the process proceeds to the next step 520, and the control of the initial setting of the present air conditioner is completed. As described above, the control mode can be stored by configuring the idling portion of the servo motor where the terminals are driven but the damper is not driven by a link mechanism or the like, and by providing a contact in the idling portion.

In the above embodiment, the contact is formed by a rectangular parallelepiped conductor. However, the present invention is not limited to this.
The contacts may be arranged in parallel, and the terminals may be provided so as to be movable between the contacts.

In this embodiment, the control mode is determined by grounding the contact 52 and determining whether or not each of the other contacts is grounded by the terminal 58. A configuration may be employed in which a constant voltage is applied to the contact 52 and the potential corresponding to each of the other contacts is measured.

When the switch position storage device of the present invention is used, as in the above embodiments, the control mode can be stored using a self-returning momentary switch capable of conducting and opening in a short stroke. Therefore, it can be used even if the operation panel on which the switches are arranged is covered with a flat sheet, and can be used even in an environment where there is a lot of dust. In addition, since the operation panel has a design surface, it is preferable to cover the operation panel with a flat sheet in consideration of appearance.

[0097]

As described above, according to the switch position storage device of the present invention, the position between the conductive position and the non-conductive position provided by a plurality of contacts is determined according to the conduction of the self-returning switch. Drive the displacing conducting means. Since a constant voltage is applied to one of the contacts by the voltage applying means, the voltage of the contact varies depending on the position of the conducting means. If the voltage of this contact is detected by the detecting means, the output means can determine the position of the conducting means and output it. Therefore,
The state of the switch can be stored.

Further, by using a self-returning switch, the switch can be operated even if it is covered with a cover member. Therefore, dust can be prevented from entering by covering with the covering member, and defects can be eliminated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of an air conditioner using a switch position storage device of the present invention.

FIG. 2 is a configuration diagram of a servomotor showing one embodiment of a switch position storage device of the present invention.

FIG. 3 is a front view of an operation panel used in the air conditioner.

FIG. 4 is a flowchart showing the operation of the control unit of the present invention.

FIG. 5 is a configuration diagram of a servomotor showing another embodiment of the switch position storage device of the present invention.

FIG. 6 is a flowchart illustrating an operation of a control unit according to another embodiment of the present invention.

FIG. 7 is a flowchart illustrating an operation of a control unit according to another embodiment of the present invention.

FIG. 8 is a configuration diagram of a servomotor showing another embodiment of the switch position storage device of the present invention.

FIG. 9 is a flowchart illustrating an operation of a control unit according to another embodiment of the present invention.

FIG. 10 is a diagram showing a relationship between a terminal voltage and a control mode according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 17 inside / outside air switching damper 17a servo motor 18 blower 18a servo motor 22 outlet switching damper 22a servo motor 27 inside air suction switch 27a indicator 28 outside air suction switch 28a indicator 40 control unit 41 motor unit 42 first contact 43 second contact 44 terminal 47 Ignition key

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 9/54 B60R 16/02 B60H 1/00

Claims (2)

(57) [Claims] 1. A self-recovering type switch for closing an electric circuit by receiving a pressing force and opening the electric circuit by releasing the pressing force, and for covering the outer periphery of the switch and receiving the pressing force, the switch A cover member displaced together with the plurality of contacts, a plurality of contacts made of a conductor, a potential applying means for applying a constant voltage to one of the contacts, and a conduction position for conducting the potential-applied contact to another contact. And a conducting means comprising a conductor which is displaced between a non-conducting position for bringing the contact and another contact into a non-conducting state; a driving means for displacing the conducting means in accordance with conduction of the switch; A switch position storage device comprising: a detection unit that detects a potential of a contact point of the switch; and an output unit that determines and outputs a position of the conduction unit based on the potential detected by the detection unit. 2. The switch position storage device according to claim 1, wherein said potential applying means grounds one of said contacts.