JPH09306285A - In-liquid switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent troubles from generated due to an insulation failure and improve assembly property by mounting a fixed contact of a base board downwardly, ensuring insulation property between fixed contacts on plural walls, and further cleaning a surface by means a protrusion of a movable base board. SOLUTION: This in-liquid switch device is mounted on a speed changer case in an UP direction. Therefore, a fixed contact 11 of a base board 1 is directed downwardly, and a foreign object adhered to the fixed contact 11 is peeled off and dropped by means of gravity. If the foreign object adhered to the fixed contact 11 is hardly peeled of the and dropped, plural walls ensure insulation property between fixed contacts 11. Further, since a protrusion 31 of a movable board 3 cleans the surface of the fixed contact 11, the adhered foreign object is forcibly peeled off from the fixed contact 11. Therefore, even if the in-liquid switch device is used by impregnating it in the oil inside an auto speed changer in which a conductive foreign object is mixed and is dirt, an insulation failure between fixed contacts 11 is not generated. Thus, a conductive foreign object is hardly adhered to the surface of the fixed contacts, a trouble due to an insulation failure is not generated, and good assembling property is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submerged switch device which can be used while being immersed in a liquid such as oil in an automatic transmission, and more particularly to a dirty liquid containing conductive foreign matter or the like. The present invention relates to a submerged switch device in which troubles such as poor insulation do not easily occur even when used inside.

[0002]

2. Description of the Related Art Conventionally, there is a switch device disclosed in Japanese Utility Model Laid-Open No. 4-65622 which can be used while being immersed in oil inside an automatic transmission. Its technical content is to house a fixed contact and a movable contact inside a case sealed with an O-ring, and connect one of the rods movably supported by a bellows to the movable contact and the other to a manual valve, respectively. The movable contact comes into contact with the fixed contact according to the operating position of the manual valve.

[0003]

However, in the above-mentioned conventional submerged switch device, the contact surface of the fixed contact with respect to the movable contact is provided so as to face upward.
Foreign matter easily gets on the surface of the fixed contact. Therefore, when oil penetrates into the submerged switch device, conductive foreign matter such as metal powder mixed with oil may settle and adhere to the surface of the fixed contact, causing a problem such as insulation failure. It was. Therefore, in the conventional structure, it is necessary to store the fixed contacts and the like in an enclosed space isolated from the outside. However, as in the automatic transmission, when the temperature of the oil greatly rises and falls with the operation of the engine, the air inside the closed space expands and contracts, or when the rod and bellows operate, it becomes A pressure difference is generated, and due to the pressure difference, a phenomenon occurs that oil is sucked into the closed space, and a conductive foreign substance is sucked together with the oil. For that reason,
It is necessary to completely seal the case in order to solve the problem of foreign matter settling and adhering to the surface of the fixed contact, but it is reasonable to completely seal the case because the case becomes expensive or complicated. It wasn't a solution.

The present invention solves the above-mentioned problems, and even if it is used by immersing it in a dirty liquid containing conductive foreign matter such as oil inside the automatic transmission, the conductive foreign matter is not used. It is an object of the present invention to provide a submerged switch device which is less likely to adhere to the surface of the fixed contact, which makes it difficult for problems such as insulation failure to occur, and which has a good assembling property.

[0005]

In order to solve the above-mentioned problems, first, the invention according to claim 1 has a movable contact, a movable plate supporting the movable contact, and a fixed contact with which the movable contact is in sliding contact. In a submerged switch device which is provided with a base supporting the fixed contact and is used by being immersed in the liquid,
The fixed contact is provided on the lower surface of the base, and a frame body having an open hole at the bottom, which is large enough for liquid to freely flow in and out, is assembled to the base, and a space formed by the base and the frame body. Provided is an in-liquid switch device having the movable plate housed therein.

Further, the invention according to claim 2 provides an in-liquid switch device in which a bracket is attached to the frame body, and an operation portion of the movable plate is movably mounted in a gap formed by the bracket and the frame body. To do.

According to a third aspect of the present invention, the operating portion has a first convex portion projecting toward the bracket side and a second convex portion projecting toward the frame body side, and the movable plate from the outer side to the inner side of the frame body. Provided is a submerged switch device having a connecting pin fitted therein.

The invention according to claim 4 provides an in-liquid switch device in which the connecting pin is fitted to the movable plate through the opening hole.

In the liquid according to the present invention, the width of the open hole is larger than the diameter of the connecting pin, and the length of the open hole is larger than the moving range of the connecting pin. A switch device is provided.

The invention according to claim 6 provides the submerged switch device in which the shape of the open hole is a taper shape suitable for the oil that has penetrated into the frame body to flow out.

The invention according to claim 7 provides an in-liquid switch device in which the movable plate is connected to one end of a manual valve of an automatic transmission.

[0012]

1 is a block diagram of a first embodiment of the present invention.
This will be described with reference to FIG. First, the base 1 is formed of a synthetic resin having heat resistance and oil resistance sufficient to endure when used by being immersed in high temperature oil in an automatic transmission. As shown in FIGS. 5 rows of fixed contacts 11 are provided. The fixed contact 11 is a portion where a movable contact 2 described later is in sliding contact, and a first wall 14 and a second wall 15 are provided along the fixed contact 11.
The first wall 14 and the second wall 15 have both a function of enhancing the insulating performance between the fixed contacts 11 and a function of guiding the protrusion 31 of the movable plate 3 described later, and particularly the first wall 14 and the second wall 15.
The wall 14 has a first positioning hole 13 in the middle thereof.

Further, the board 1 is integrally formed with a connector 16, and the terminal 1 electrically connected to the fixed contact 11 is provided.
7 is projected inside the connector 16. Further, the base 1 is provided with caulking portions 18 at several points on the periphery. The caulking portion 18 is a portion for caulking a caulking piece 53 of the frame body 5 described later.

Next, the movable contact 2 is a member that makes sliding contact with the fixed contact 11, and a number of contact pieces 21 corresponding to the number of rows of the fixed contact 11, that is, five sets of contact pieces 21, are alternately arranged as shown in FIG. The contact pieces 21 are arranged in pairs, and each pair of contact pieces 21 is formed as a pair. The movable contact 2 is attached to the movable platen 3 by using a washer 22 and a rivet 23.

Next, the movable plate 3 is provided with a protrusion 31 for wiping the surface of the fixed contact 11 and the first positioning hole 1 of the base 1.
3 and a second positioning hole 32 corresponding to No. 3, and the operation portion 4 is insert-molded. The operating portion 4 has a connecting hole 41 for connecting to the manual valve 9 of the automatic transmission. The connecting hole 41 is formed in a long hole shape having a shape elongated in a direction substantially perpendicular to the moving direction of the movable platen 3.

Next, the frame body 5 is a member formed by pressing a metal plate, and has an opening hole 51, a positioning pin insertion hole 52, and a caulking piece 53, which are large enough to allow the liquid to freely flow in and out.
And a screw hole 54. The movable board 3 is housed in the space defined by the frame 5 and the base 1.

The bracket 7 also has a mounting hole 71 for mounting on the case of the automatic transmission and a long hole 72 for mounting on the frame body 5, and the nut 8 inserted into the long hole 72.
When the screw is tightened in the screw hole 54 of the frame body 5, the screw tightening position is adjusted so that the automatic transmission case can be positioned.

Reference numeral 6 is a positioning pin. The positioning pin 6 is used for moving the movable platen 3 and the manual valve 9
It is a member used to match the movement position of the. Here, a procedure for matching the positional relationship between the movable platen 3 and the manual valve 9 will be exemplified. First, as a first procedure, the positioning pin 6 is inserted into both the first positioning hole 13 of the base 1 and the second positioning hole 32 of the movable platen 3. At this point, the position of the movable platen 3 with respect to the base 1 is temporarily held by the positioning pins 6. Next, as a second procedure, the bracket 7 is fastened to the automatic transmission case. At this point, the nut 8 is in a state of being lightly tightened in the screw hole 54 of the frame body 5. Next, as a third procedure, the manual valve 9 and the detent lever 1 which have been previously operated to the predetermined shift positions.
0 is connected to the connection hole 41 of the operation portion 4 within a range allowed by the long hole 72 of the bracket 7 and the frame body 5 and the bracket 7.
Correct the relative position of. Next, as the fourth procedure, the nut 8
Can be firmly tightened in the screw hole 54 of the frame body 5. At this time, the frame body 5 is fixed to the bracket 7, and the positional relationship between the movable platen 3 and the manual valve 9 matches. Finally the fifth
As a procedure, the positioning pin 6 is attached to the first positioning hole 1
3. Pull out from the second positioning hole 32 and the positioning pin insertion hole 52.

Next, the operation of the first embodiment will be described.
The submerged switch device C of the first embodiment is mounted on the automatic transmission case in a posture in which the arrow UP direction shown in FIG. 4 is the upper side, and the manual valve 9 and the detent lever are provided in the connecting hole 41 of the operation portion 4. 10 are connected. For that reason,
When the driver operates the shift lever (not shown) to operate the detent lever 10, the manual valve 9 and the operating portion 4 move to the corresponding shift positions in conjunction with the operation, and the movable contact 2 also moves. 4, and the contact position with respect to the fixed contact 11 is switched. As a result, the submerged switch device C operates as a switch corresponding to the shift position.

At this time, since the submerged switch device C is mounted on the automatic transmission case in a posture in which the arrow UP direction shown in FIG.
1 is facing down. Therefore, the foreign matter attached to the fixed contact 11 falls due to gravity and is peeled off from the fixed contact 11. Further, even if the foreign matter attached to the fixed contact 11 is difficult to peel off, the first wall 14 and the second wall 1
Not only does 5 secure the insulation between the fixed contacts 11, but the protrusion 31 of the movable plate 3 wipes the surface of the fixed contacts 11, so that the adhered foreign matter is forcibly separated from the fixed contacts 11. Thus, the submerged switch device C does not cause insulation failure between the fixed contacts 11 even when it is used by immersing it in the dirty oil inside the automatic transmission mixed with conductive foreign matter.

Next, a second embodiment of the present invention will be described with reference to FIGS. The submerged switch device D of the second embodiment is the submerged switch device C of the first embodiment described above.
The operation unit 4A, the frame body 5A, and the bracket 7A, which have substantially the same configuration as those of the first embodiment, but have different configurations from the submerged switch device C of the first embodiment will be described.

First, the operating portion 4A is similar to the operating portion 4 in that it has an elongated hole-shaped connecting hole 41A for connecting to the manual valve 9 of the automatic transmission, but the operating portion in the second embodiment is the same. Unlike the operation unit 4 of the first embodiment, the portion 4A has a structure that slides on the outer wall of the frame body 5A. More specifically, the operation portion 4A includes a caulking hole 43A for caulking the connecting pin 42A and a pin hole 4 into which the positioning pin 6 is inserted.
4A and the first convex portion 45A protruding toward the bracket 7A side
And a second convex portion 46A protruding toward the frame body 5A, and connecting pins 42 from the outside of the frame body 5A to the movable plate 3 inside.
A is fitted.

Next, the frame 5A is a member obtained by pressing a metal plate, has an open hole 51A in the lower portion 52A which is large enough for liquid to freely flow in and out, and also has a caulking piece 5
3A. The movable board 3 is housed in the space formed by the frame 5A and the base 1. Open hole 51A
Is slightly larger than the diameter of the connecting pin 42A, and the length of the open hole 51A is the connecting pin 42.
The size is slightly larger than the moving range of A. Further, the open hole 51A has a tapered shape suitable for flowing the oil that has penetrated into the frame body 5A.

Further, the bracket 7A has a mounting hole 71A for mounting to the automatic transmission case and a pin hole 72A into which the positioning pin 6 is inserted. The bracket 7A
Is welded to and integrated with the frame body 5A. The step is to first fit the connecting pin 42A of the operation portion 4A to the movable platen 3, and then to connect the operation portion 4A to the frame body 5A and the bracket 7A. It comprises a step of sandwiching and a step of finally welding the frame body 5A and the bracket 7A. The operation of the submerged switch device D of the second embodiment is the same as that of the submerged switch device C of the first embodiment described above, and a description of the operation is omitted.

[0025]

Since the submerged switch device according to the present invention has the above-described structure and action, it should be used by immersing it in a dirty liquid containing conductive foreign matter such as oil in the automatic transmission. However, the conductive foreign matter is unlikely to adhere to the surface of the fixed contact, so that troubles such as defective insulation are unlikely to occur and the assembling property is good.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

2 is a side view seen from the direction of arrow A shown in FIG.
The main part is shown in cross section.

FIG. 3 is a bottom view seen from the direction of arrow B shown in FIG.

FIG. 4 is a perspective view illustrating a state in which the submerged switch device shown in FIG. 1 is connected to a manual valve and a detent lever.

FIG. 5 is an exploded perspective view showing a second embodiment of the present invention.

6 is a cross-sectional view of a frame body, an operation portion and a bracket shown in FIG.

[Explanation of symbols]

 1 Base 2 Movable contact 3 Movable plate 4, 4A Operation part 5, 5A Frame 6 Positioning pin 7, 7A Bracket 8 Nut 9 Manual valve 10 Detent lever

Claims (7)

[Claims] 1. A movable contact (2), a movable plate (3) supporting the movable contact (2), a fixed contact (11) with which the movable contact (2) is in sliding contact, and the fixed contact (11). ) Supporting a substrate (1), and the submerged switch device used by being immersed in the liquid, the fixed contact (11) is provided on the lower surface (12) of the substrate (1), and the liquid is free. A frame body (5A) having an open hole (51A) of a size sufficient for moving in and out of is attached to the base body (1), and the base body (1) and the frame body (5A) An in-liquid switch device in which the movable plate (3) is housed in the space formed by. 2. The invention according to claim 1, wherein a bracket (7A) can be attached to the frame body (5A), and the movable plate (7A) and the frame body (5A) are provided in a gap formed between the movable plate (7A) and the frame body (5A). An in-liquid switch device in which the operation unit (4A) of 3) is movably mounted. 3. The invention according to claim 2, wherein the operation portion (4A) has a first protrusion (45A) protruding toward the bracket (7A) and a second protrusion (45A) protruding toward the frame (5A).
An in-liquid switch device having a convex portion (46A) and a connecting pin (42A) fitted from the outside of the frame body (5A) to the movable plate (3) inside. 4. The submerged switch device according to claim 3, wherein the connecting pin (42A) is fitted to the movable platen (3) through the opening hole (51A). 5. The invention according to claim 4, wherein the width dimension of the opening hole (51A) is the connecting pin (42).
A submerged switch device having a size larger than the diameter of A) and a length size of the open hole (51A) larger than a moving range of the connecting pin (42A). 6. The invention according to claim 1, 2, 3, 4 or 5, wherein the open hole (51A) has a tapered shape suitable for the oil that has penetrated into the frame (5A) to flow out. Submerged switch device made of. 7. The submerged switch device according to claim 1, 2, 3, 4, 5 or 6, wherein the movable plate (3) is connected to one end of a manual valve (9) of an automatic transmission.