JPH062006Y2 - Pneumatic switch device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pneumatic switch device, and more particularly to a pneumatic switch device in which a plurality of pneumatic switches are used to switch an air conditioning mode in an air conditioner of a vehicle, for example. The present invention relates to a connecting device forming a pneumatic passage for connecting a power source and a pneumatic actuating means to a predetermined switching port of the pneumatic switch.

(Prior Art and Problems Thereof) Conventionally, in order to obtain a predetermined operating state in various devices, a pneumatic operating means is provided, and the pneumatic operating means is operated by a predetermined air pressure source. Things are known. In such an apparatus, normally, a structure in which a predetermined operating state is obtained by controlling switching of a predetermined air pressure source with respect to the air pressure operating means by using an air pressure switch is provided.

For example, in an air conditioner for an automobile, in recent years, a negative pressure source can be easily obtained, a structure is simple, and further, a preference of a user is satisfied. As described above, an air-conditioning control device having the above-described structure, in which the connection and disconnection of the negative pressure source with respect to a predetermined diaphragm is controlled to switch and set the air-conditioning mode, has come to be preferably used.

And, in an apparatus having such pneumatic operating means, a pneumatic switch device for selectively connecting the pneumatic operating means to a predetermined pneumatic pressure source is generally
It is composed of the air pressure switch and a hose made of rubber or the like for connecting a predetermined air pressure source and the air pressure operating means through the air pressure switch.

By the way, in the pneumatic switch device as described above, in the case where a plurality of pneumatic switches are required to obtain a predetermined operating state, the pneumatic circuit formed by the hose made of rubber or the like is It was inevitable that it would be complicated.

For example, in the air conditioning control device for an automobile as described above,
As shown in FIG. 13, four negative pressure changeover switches 100 are required in the air pressure switch device that can be set to change over to five air conditioning modes, and a predetermined pressure changeover switch 100 is provided. Switch port unit 102,
The port portion 106 provided on the joint member 104 or another switching port portion 102 of the negative pressure changeover switch 100.
On the other hand, a pneumatic circuit is formed by connecting the hoses 108 to each other. Then, the joint member 104 is made to communicate with a predetermined negative pressure source and a diaphragm as an air pressure operating means.
By connecting to a joint (not shown), it is possible to obtain an air pressure switch device in an air conditioning control device capable of setting the air conditioning mode according to the switching setting of the four negative pressure changeover switches 100.

However, as is clear from FIG. 13, the pneumatic circuit formed by the large number of hoses 108 is very complicated, and therefore, there is a large number of hoses 108 at the time of assembly thereof, so that workability is improved. However, there is a problem in that the operator is likely to make a mistake in the connection. In addition, due to breakage or disconnection of the hose 108, such circuit continuity failure is likely to occur, and in addition, a wide space is required for connection and handling of the hose 108. It was never desirable for places where the installation space was extremely limited, such as the instrument panel section.

Moreover, a large number of hoses 1 connected to a plurality of switches
If the pneumatic circuit formed by 08 is forcibly arranged in a space-restricted portion such as the above-described automobile instrument panel, the hose 108 is more likely to be broken or pulled out, and therefore the hose 108 is likely to be broken. Problems such as air leakage and poor continuity of the pneumatic circuit also occur due to breakage or disconnection, and even the basic conditions for the pneumatic circuit, such as good air continuity and circuit sealability, cannot be satisfied. There were many cases.

(Solution) The present invention has been made in view of the above circumstances, and its gist is to provide a plurality of pneumatic actuating means and a plurality of pneumatic pressure sources by selectively connecting a plurality of pneumatic pressure means. In a pneumatic switch device adapted to perform switching of a plurality of pneumatic passages by a pneumatic switch, a base having a plurality of first connection ports connected to the pneumatic operating means and at least one of the pneumatic sources, and a plurality of the A predetermined connection port of the pneumatic switch is directly connected, and a second connection port provided as a cylindrical projection protruding toward the switching port side is integrally formed of a rubber material on the base. A connecting device including a plate-shaped seal rubber to be overlapped, a plurality of circuit grooves corresponding to a predetermined pneumatic circuit form is formed on the base,
By overlaying the seal rubber on the base and covering the circuit groove, a plurality of pneumatic circuits corresponding to at least the first connection ports are formed, and the second connection ports are respectively provided in the pneumatic circuits. The air pressure actuating means and the air pressure source are connected in a predetermined combination in accordance with the switching operation by the air pressure switch.

(Operation / Effect) That is, in the pneumatic switch device according to the present invention, the switching port of the pneumatic switch is connected to the switching port of the pneumatic pressure source, pneumatic operating means or another pneumatic switch to form a pneumatic passage. As a connection device to
The first connection port connected to the air pressure source or the air pressure operating means, the second connection port connected to the switching port of the air pressure switch, and the respective ports are connected to each other to form a predetermined circuit. The pneumatic circuit is used as the connecting device integrally provided in the main body. Then, according to the switching operation of the air pressure switch, the air pressure operating means and the air pressure source are connected in a predetermined combination, whereby a predetermined operating state is obtained.

Therefore, in the present invention, the pneumatic circuit, which is conventionally formed by a hose made of rubber or the like, has a plurality of grooves formed on the base and the plate-like shape in the connection device in which the plate-shaped seal rubber is superposed on the base. Since a plurality of pneumatic circuits are formed by the seal rubber, it is possible to advantageously avoid the occurrence of defective conduction due to crushing or disconnection of the hose, and the pneumatic circuit in such a connecting device can be installed in an installation space. Since it can be designed as an arbitrary shape, it is possible to design it as a flat shape that does not require depth or thickness like in the case of a hose. It can be realized.

Further, in the connecting device in the pneumatic switch device of the present invention, the base which is superposed to form the connecting device and the plate-shaped seal rubber respectively connect to the pneumatic operating means or the pneumatic source, and the pneumatic switch. Since it is integrally formed with the second connection port that is connected to the switching port of, the connection device that connects many hoses to the switching port of many pneumatic switches, the pneumatic actuation means, or the pneumatic source, which has been conventionally performed. Since it is complicated and error-prone to assemble a predetermined pneumatic circuit by connecting to the connection port of No.3, it does not require any assembly process that has poor workability. This prevents the occurrence of port connection mistakes that may occur and significantly improves assembly workability. And it has the air pressure switch device according to the present invention, also, especially in the present invention, a second connection port that connects directly with the switching port of the pneumatic switch,
Since the plate-shaped seal rubber is integrally formed of a rubber material, the connection between the switching port of the pneumatic switch and the second connection port is significantly strengthened despite the compact structure of the present invention. You can do it.

In addition, according to the present invention, a pneumatic circuit is formed by stacking a plate-shaped seal rubber having the second connection port on a substrate provided with a circuit groove. In order to further simplify the structure of the connecting device formed with, the connection to the pneumatic switch can be performed more easily, and the shape of the connecting device can be adapted to any space as described above.
Combined with the fact that it can be designed to be modified, even in products where mountability and compactness of parts are generally important issues, such as automobiles, especially in the instrument panel part of automobiles, installation space Even in places where the air pressure is significantly limited, the pneumatic switch device of the present invention is suitable for installation while ensuring good air continuity and circuit sealability, which are the basic conditions for pneumatic circuits. It can be done.

That is, in the present invention, as described above, since the pneumatic circuit is formed by stacking the plate-shaped sealing rubber on the base plate having the circuit groove, the pneumatic circuit is substantially completely sealed. Therefore, there is no possibility of air leakage, and there is no possibility that the pneumatic circuit is crushed because good air conduction is always ensured. Therefore, conventionally, when a complicated pneumatic circuit formed by a large number of hoses connected to a plurality of pneumatic switches is arranged in a space-limited part such as the above-mentioned automobile instrument panel, it occurs. Problems such as air leakage and poor continuity of the pneumatic circuit due to breakage and disconnection of the hose were also easy.
The pneumatic switch device of the present invention can be completely eliminated.

(Example) In order to clarify the present invention more concretely,
One example thereof will be described in detail with reference to the drawings.

In the present embodiment, "DEF", "HEA"
"T", "BI-LEVEL", "VENT" and "A"
A case will be described in which the present invention is applied to an air pressure switch device in a vehicle air conditioning control device capable of switching setting to five air conditioning modes of "UTO".

First, FIG. 1, FIG. 2 and FIG. 3 show a plan view and two sectional views of the pneumatic switch device 14 of this embodiment, respectively, and FIG. 4 shows an exploded view thereof. There is. As is apparent from these figures, the pneumatic switch device 14 of the present embodiment is constructed by integrally connecting four negative pressure changeover switches 12 to the connecting device 10 according to the present invention. .

The respective negative pressure changeover switches 12 have been clarified in the air conditioning control device previously proposed by the applicant of the present application as Japanese Utility Model Application No. 60-74031.
As shown in FIG. 1, a rear member 16 and a front member 18 forming a housing, a port member 22 having three switching ports 20 fixed to the outer surface of the rear wall of the rear member 16, and a rear member 22. The seal member 2 made of a rubber elastic body is slidably contacted with the inner surface of the rear wall of the side member 16 and accommodated in the inner space of the housing in a state of being movable in the longitudinal direction of the housing.
4 and an operation member 28 which holds the front surface of the seal member 24 on its rear side and has an operation portion 26 which is projected on the front center portion of the housing on the front surface thereof.
A notch hole through which the operating portion 28 penetrates is provided at a substantially central portion thereof, and has a plate shape that is slidably contacted with the inner surface of the front member 18 and can move integrally with the operating member 28 in the longitudinal direction of the housing. And a compression coil spring 32 which is interposed between the operating member 28 and the sliding member 30 and applies an urging force to the seal member 24 via the operating member 28.

Further, in such a negative pressure changeover switch 12, the operating member 26 of the operating member 28 projected from the front wall of the housing is slid in the longitudinal direction of the housing so that the sealing member 24 is moved backward. The side member 16 is slidable along the inner surface of the rear wall of the side member 16.
Then, two substantially circular recesses 34, 34 formed on the sliding surface of the seal member 24 are connected to a predetermined air pressure source or a diaphragm or the like as an air pressure operating means provided behind the recesses. Two switching ports 2 in which the central one of the switching ports 20 is selectively communicated with one of the two switching ports 20, 20 on both sides thereof, while the remaining switching ports 20 are communicated with them.
It has a structure that reliably blocks 0, 20 and the external space.

On the other hand, as shown in FIGS. 1 to 4, the connection device 10 is configured by integrally laminating the base 36, the plate-shaped seal rubber 38, and the holding plate 40.

More specifically, as shown in FIG. 4, FIG. 5 and FIG. 6, the base 36 is provided integrally with a main body 42 having a substantially rectangular shape and having a predetermined thickness, and a back surface thereof. And the joint portion 44 formed as described above. As shown in FIG. 3 and FIG. 5, the joint portion 44 is connected to the joint portion 44 which is in communication with the diaphragm as the air pressure operating means and the negative pressure source as the air pressure source. It is composed of five ports 46 as a first connection port corresponding to a joint (not shown), a wall portion 48 and two locking claws 50, 50. Further, as shown in FIGS. 4 and 6, the front surface of the base 36 is formed as a recess 52 in which a seal rubber 38 and a pressing plate 40, which will be described later, are accommodated in substantially the entire surface thereof. Then, on the bottom surface of the recess 52, the five ports 46 and a seal rubber 38 described later are provided.
A circuit groove 56 for forming a pneumatic circuit for connecting the ten ports 54 as the second connection ports formed in 1) in a predetermined combination is provided.

Further, as shown in FIGS. 4 and 7, the seal rubber 38 has a plate shape having a plane shape corresponding to the size of the recess 52 of the base 36, and the front surface thereof has the
Port 5 as a second connection port connected to each of the switching ports 20 of the two negative pressure changeover switches 12.
4 is a switching port 20 in the longitudinal direction of the seal rubber 38.
As the cylindrical protrusions projecting to the side to be connected to the seal rubber 38, ten rubbers of the same quality as the seal rubber 38 are provided integrally with the seal rubber 38 in a straight line.

On the other hand, as shown in FIGS. 4 and 8, the holding plate 40 has a plate shape having a plane shape corresponding to the size of the recess 52 of the base 36, and is superposed on the seal rubber 38. In the opened state, the through hole 58 through which the port 54 is inserted is provided at a position corresponding to the port 54.
It is provided individually.

Then, as shown in FIG. 4, the seal rubber 38 and the pressing plate 40 are fitted into the recesses 52 of the base 36, and by the back surface of the seal rubber 38,
The circuit groove 56 provided in the recess 52 of the base 36 is covered, and the seal rubber 38 is attached to the recess 52 of the base 36.
As shown in FIGS. 1 to 3, the connection device 1 integrally provided with the joint portion 44, the predetermined pneumatic circuit 60 and the port 54 by being fixed to the
0 will be formed.

Further, as shown in FIG. 1, the ten ports 54 are connected to the diaphragms of the four negative pressure changeover switches 12 or the negative pressure sources or the changeover ports 20 of the other negative pressure changeover switches 12. Switching port 20 to be done
, Respectively, and the five ports 46 of the joint portion 44 are connected to a predetermined diaphragm or an air pressure passage communicated with a negative pressure source, so that the negative pressure changeover switch 12 is changed over. Accordingly, the air pressure sources connected to the respective diaphragms are switched to form the air pressure switch device 14 that is set to the target air conditioning mode.

And, the pneumatic switch device 1 as described above
As shown in FIG. 12, reference numeral 4 designates three plate cams 62 each having a notch groove that engages with the operating portion 26 of the negative pressure changeover switch 12, which are different from each other, and the plate cams 62.
And the five push lever devices 64 for relatively moving them relative to each other in the longitudinal direction, and they are housed in the housing 66 in a state of being engaged with each other.

In such an air conditioning control device, when the push lever 68 of one of the push lever devices 64 is selectively pushed, the length of each plate cam 62 is changed according to the operation of the push lever 68. The negative pressure changeover switches 12 engaged with the plate cams 62 are changed over by being relatively moved in association with the direction. That is, the four negative pressure changeover switches 12 are interlocked with each other in accordance with the pushed push lever 68, and the air pressure sources connected to the respective diaphragms are changed over. The air conditioning mode of the air conditioning controller is switched to the air conditioning mode corresponding to the pushed push lever 68.

Since the specific structure and operation of the air conditioning control device itself as described above are disclosed in the above-mentioned Japanese Utility Model Application No. 60-74031, a detailed description of such an air conditioning control device will be given here. The description will be omitted.

In order to further clarify the connection circuit of the pneumatic switch device and the specific operation thereof in the present embodiment described above, a description will be added below.

That is, as shown in FIG. 1, the four negative pressure changeover switches 12 in the air pressure switch device 14 according to the present invention are arranged in order from the left side 12A, 12B, 12C and 1.
2D, and when the respective switching ports 20 in each negative pressure changeover switch are set to 20a, 20b, and 20c in order from the left side, in accordance with the pressing operation of a push lever (not shown) for switching to a predetermined air conditioning mode, each pneumatic pressure is changed. Each switching port 20 of the switch 12 is set so as to communicate with each other as shown in Table 1 below. In addition, in the following Table 1, switching ports 20 are shown which are communicated with each other by subscripts.

And, in such a pneumatic switch device 14,
As shown in FIG. 9, each of the changeover ports 20 of each of the negative pressure changeover switches 12 passes through the pneumatic circuit provided in the connecting device 10, and as shown in FIG. , A negative pressure source 74 as an air pressure source and a negative pressure source for AUTO, that is, AUTO
Negative pressure source 76,7 with ON / OFF switch by signal
8 or by directly opening to the atmosphere, the air-conditioning states are changed to "AUTO", "VENT", and
"BI-LEVEL", "HEAT" and "DEF"
It is designed to be switched among the five modes.

That is, when the air pressure switch device 14 is set to the AUTO state, the negative pressure changeover switches 12 are changed over according to the table 1 as a result, and as a result, in the air pressure circuit shown in FIG. Negative pressure sources 76 and 78 are connected to the first and second diaphragms 70 and 72, respectively, so that the diaphragms 70 and 72 are driven by the negative pressure from the negative pressure sources 76 and 78 for AUTO, The "AUTO" air-conditioning state is obtained, and when the air pressure switch device 14 is set to the VENT state, similarly, both the diaphragms 70 and 72 are opened to the atmosphere as the air pressure source, and as a result, " The air conditioning state of "VENT" is obtained.

When the air pressure switch device 14 is switched to the BI-LEVEL state, the first diaphragm 70 is connected to the negative pressure source 74 while the second diaphragm 72 is opened to the atmosphere, resulting in "BI-LEVEL". That is, the air-conditioning state is obtained. Similarly, the air pressure switch device 14 is switched to the state of HEAT or DEF to set "HEAT" to "DE".
The air conditioning state of "F" will be obtained.

As is apparent from the above description, the connecting device 10 in the present embodiment forms the predetermined pneumatic passage according to the switching operation of each negative pressure changeover switch 12, and the pneumatic circuit as shown in FIG. And the connection device 1
By connecting the negative pressure changeover switch 12 and the air pressure passage connected to a predetermined air pressure source to the rubber port 54 and the joint portion 44 which are integrally provided at 0, the air pressure switch device 14 can be operated. Since it is formed, the connection is extremely easy and no connection error occurs.

In particular, the second connection port 54, which is connected to the switching port 20 of the pneumatic switch, is provided integrally with the plate-shaped seal rubber 38 with the same rubber material, and the second connection port 54 is the same as that of the pneumatic switch. Switching port 20
Since it is formed on the plate-shaped seal rubber 38 as a cylindrical protrusion projecting toward the side of, the connection between the switching port 20 and the second connection port 54 has a compact structure. Instead, it can be made extremely strong.

Further, since a tube member such as rubber is not used in the pneumatic circuit 60, there is no possibility that the circuit is not electrically connected due to crushing, breaking, pulling out, or the like of the tube.
The performance and the assembling workability of such an air conditioning control device can be significantly improved.

In addition, since the pneumatic circuit 60 is formed on a plane inside the connecting device 10, the connecting device 1
0 can be effectively reduced, and by adopting the above-mentioned vehicular air-conditioning control device proposed by the applicant of the present application, the operability is good and the air-conditioning control device is It was possible to make the car even more compact and improve its performance.

Therefore, according to the conventional structure, it can be installed satisfactorily even in a place where the space is remarkably limited, such as an instrument panel portion of an automobile, and at the same time, the board 36 provided with the circuit groove and the plate-like seal rubber 38 are provided. By overlapping and, inside the connection device 10,
Since the pneumatic circuit 60 is formed, the pneumatic circuit 60 of the pneumatic switch device having such a structure is excellent in basic conditions as a pneumatic circuit, such as good air conduction and circuit sealing property. It was possible to realize a pneumatic switch device with excellent performance. If the air pressure switch having the above-described structure is applied to the vehicle air-conditioning control device previously proposed by the applicant of the present application, a high-performance air-conditioning control device can be advantageously realized.

Although one embodiment of the present invention has been described in detail above, this is a literal example, and the present invention should not be construed as being limited to such a specific example.

For example, the pneumatic circuit 60 in the above embodiment is formed by covering the circuit groove 56 provided in the base 36 of the connection device 10 with the sealing rubber 38, but such a circuit is engraved or penetrated. It is also possible to form it by a printed circuit board.

Further, in the above-described embodiment, the pneumatic circuit 60 in the connection device 10 is provided on the vertical surface with respect to the port 54 and the joint portion 44, but the pneumatic circuit 60 may be provided on the horizontal surface with respect to them. It is possible.

Further, in the above embodiment, the air conditioning mode is set to "AUTO",
The case where the present invention is applied to an air-conditioning control device capable of switching to five modes of "VENT", "BI-LEVEL", "HEAT" and "DEF" has been described. The air pressure source to be connected is not limited to the negative pressure source as in the above-mentioned embodiment, and the predetermined pressure source larger than the atmospheric pressure can be applied to the air conditioning control device for the combination. It can be effectively used as a pneumatic circuit for.

Further, in the above-mentioned embodiment, the present applicant has applied to the vehicle air-conditioning control device previously proposed, whereby the above-mentioned effects can be synergistically achieved.
It is of course possible to employ it for connection of air passages in other air-conditioning control devices and various air pressure switch devices, and by doing so, such devices can be made compact, performance and assembly workability can be improved. The effect can be effectively exhibited.

Although not enumerated one by one, it goes without saying that the present invention can be carried out in a state in which various variations, modifications, and the like are made without departing from the spirit of the invention.

[Brief description of drawings]

1 is a plan view showing an embodiment of a pneumatic switch device according to the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is an exploded view of the pneumatic switch device shown in FIG. 1, FIG. 5 is a rear view showing the base of the connecting device in FIG. 1, and FIG. 6 is a front view of the base. FIG. 7 is a front view showing a seal rubber of the connecting device, FIG. 8 is a front view showing a holding plate of the connecting device, and FIG. 9 is provided in the connecting device in the embodiment device shown in FIG. It is an explanatory view showing a pneumatic circuit for connecting each port of each pneumatic pressure changeover switch, each pneumatic pressure source, and each diaphragm. FIG. 10 is an exploded explanatory view of the negative pressure changeover switch used in the above embodiment, FIG. 11 is a plan sectional view of the negative pressure changeover switch, and FIG. 12 is also applied to the above embodiment. FIG. 13 is a partially cutaway explanatory view showing an air conditioning control device, and FIG. 13 shows a conventional air conditioning control device,
It is explanatory drawing which shows the connection state of the predetermined pneumatic passage with respect to the negative pressure changeover switch. 10: Connection device 12 (12A to 12D): Negative pressure changeover switch 14: Pneumatic pressure switch device 20 (20a to 20c): Changeover port 36: Base plate 38: Seal rubber, 40: Presser plate 46: Port (first connection port) 54: Port (second connection port) 56: Circuit groove, 60: Pneumatic circuit 70: First diaphragm (pneumatic pressure operating means) 72: Second diaphragm (pneumatic pressure operating means) 74: Negative pressure source (air pressure source) 76, 78: Negative pressure source (air pressure source) for AUTO

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location F24F 11/02 104 Z

Claims (1)

[Scope of utility model registration request] 1. An air pressure switch device in which a plurality of air pressure operating means and a plurality of air pressure sources are selectively connected by switching a plurality of air pressure passages by a plurality of air pressure switches. A base having a plurality of first connection ports connected to at least one of the pneumatic sources;
A predetermined connection port of the plurality of air pressure switches is directly connected, and a second connection port provided as a cylindrical protrusion protruding toward the side of the switching port is integrally formed of a rubber material. There is a connecting device including a plate-shaped sealing rubber laminated on the base, and a plurality of circuit grooves corresponding to a predetermined pneumatic circuit form are formed in the base, and the circuit groove is formed by superposing the sealing rubber on the base. By covering at least a plurality of pneumatic circuits corresponding to the first connection ports, the second connection ports are respectively communicated with these pneumatic circuits, and the pneumatic pressure is changed according to the switching operation by the pneumatic switch. An air pressure switch characterized in that the actuating means and the air pressure source are connected in a predetermined combination. Apparatus.