JPH0528664Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a switch device used as a detection switch for detecting the operating state of a vehicle transmission.

``Prior art'' As a switch device used in a vehicle transmission that is electrically controlled by remote control,
There is one shown in Figure 6.

In FIG. 6, a switch body 10 formed into a substantially cylindrical shape has an operating chamber 11 formed therein and an opening 12 formed at one end. A shaft 13 is slidably inserted into the operating chamber 11, and a portion thereof protrudes from the opening 12 of the switch body 10 when the switch is not in operation.

A distal end 13a of the shaft 13 is formed into a substantially hemispherical shape, and an O-ring 14 is mounted between the distal end 13a and an enlarged diameter section 13b located slightly in the middle of the distal end 13a. Further, an E-ring 15 is attached to a ring groove on the base end side of the shaft 13. This E-ring 15 is inserted into the first insulator 1 through which the shaft 13 is inserted.
The first and second insulators 16 and 17 pressed by the contact spring 18 are always in contact with each other by a stopper that prevents the second insulator 6 and the second insulator 17 from coming off.

Further, the contact plate 19 is fitted into the cylindrical shaft portion of the second insulator 17 and is held between the first and second insulators 16 and 17. Movable contacts 20 and 21 are fixed to the outer peripheral side of this contact plate 19.

A return spring 22 is provided above the E-ring 15 so as to come into contact with the E-ring 15 and a groove 24 formed in the terminal base 23, and urges the shaft 13 in the direction of protruding from the opening 12. It is configured as a spring member.

On the other hand, in the operating chamber 11, fixed contact pieces 25 and 26 are arranged within the movement area of the movable contacts 20 and 21. These fixed contact pieces 25, 26 are fixed to the terminal base 23, and lead wires 27, 28 are fixed to the ends of each contact piece 25, 26 by soldering. The above-mentioned switch device has a switch main body 1
When the shaft 13 inserted into the 0 slides toward the operating chamber in response to the operation, the movable contacts 20 and 21 come into contact with the fixed contact pieces 25 and 26, respectively, and the circuit is closed via the contact plate 19, causing the switch to close. The closed state is sent as an electrical signal via lead wires 27 and 28.

"Problems to be Solved by the Invention" However, the above-mentioned conventional device has a structure in which the contact plate 19 is sandwiched between the first insulator 16 and the second insulator 17. , there is a problem that it takes time and effort to attach the second insulators 16, 17, contact plate 19, etc.
In addition, in order to manually assemble the contact plate 19 to the shaft 13 together with the first and second insulators 16 and 17, the movable contacts 20 and 2
The molding residue of each insulator, such as human oil and phenol resin, may adhere to the 1, and the grease applied to the shaft enlarged diameter portion 13b, E-ring 15, etc. may adhere to the movable contacts 20 and 21, causing electrical problems. Continuity accuracy sometimes deteriorated.

"Means for Solving the Problems" This invention aims to solve the above-mentioned problems, and is slidably inserted into the operating chamber of the switch body, and is normally inserted through the opening of the switch body. A shaft-like member to which a pushing force is applied so that a portion of the shaft-like member protrudes; and an insulator that is slidably supported by the shaft-like member and pressed against a stopper provided on the shaft-like member by a spring force. , a contact plate supported by the insulator, and a switch device configured such that as the shaft member moves backward, a plurality of movable contacts of the contact plate come into contact with fixed contacts provided in the switch body. , an insulator having a cylindrical part on which the shaft-like member slides, a locking mechanism formed on the left and right sides of the cylindrical part, a central hole to be fitted on the outside of the cylindrical part, and a locking mechanism in the cylindrical part. A contact plate is provided which has a locking portion for locking the insulator by a spring force. Press the stopper provided on the member and fit the central hole into the shaft cylinder,
A switch device is proposed in which a contact plate is integrally fixed to an insulator by being locked by a locking mechanism.

"Operation" In the above switch device, one insulator is attached to the shaft member in advance, and then the contact plate is locked by the locking mechanism of the insulator, so that the contact plate can be fixed integrally. .

``Example'' Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a switch device according to the present invention. In this figure, a shaft 30 is a shaft-like member similar to the conventional example, and is slidably inserted into an operating chamber 32 within a switch body 31.
Note that this shaft 30 receives the expanding force of the return spring 35 provided between the E-ring 33 and the terminal base 34, and its tip 30a is pushed out from the opening 36 of the switch body 31, as in the conventional example. It stands out.

Further, 37 is an insulator into which the shaft 30 is inserted, and is prevented from coming off by the E-ring 33 installed in the ring groove of the shaft 30, and the contact spring 38 provided between it and the enlarged diameter portion 30b. It is in pressure contact with the E-ring 33 due to the expansion force.

As shown in FIGS. 2 and 3, this insulator 37 is formed as a substantially quadrilateral frame made of synthetic resin, and has a shaft cylindrical portion 37a in the center.
However, locking claws 37b and 37c are integrally formed on the left and right sides thereof.

In the insulator 37, the shaft 30 is slidably inserted into the shaft cylindrical portion 37a, and is prevented from coming off by the E-ring 33, which is a stopper, as described above.

The contact plate 39 shown in FIG. 4 is locked to the insulator 37 thus attached to the shaft 30 using the locking claws 37b and 37c.

The contact plate 39, as shown in the figure,
It is approximately disk-shaped with symmetrical arms 39a and 39b around its periphery, and is provided with a central hole 39c whose diameter is slightly larger than the diameter of the shaft cylinder portion of the insulator 37. Note that this contact plate 39 is made of a conductive material, and movable contacts 40, 4 are provided on the symmetrical arms 39a, 39b.
1 is fixed by a fixing means such as spot welding or soldering.

This contact plate 39 has its central hole 3
9c is fitted into the shaft cylindrical portion 37a of the insulator 37, and its arcuate portions 39d and 39e are pushed in from above the locking claws 37b and 37c. In this way, the contact plate 39
are locked by the locking claws 37b and 37c, and are integrally fixed to the insulator 37 as shown in FIG.

In addition, reference numerals 42 and 43 shown in FIG. 1 are plates having fixed contacts 44 and 45 fixed to one end thereof, and these are fixed to the terminal base 34.
46 and 47 are lead wires electrically connected to the other end of the plate, 48 is a spacer for guiding the insulator 37, 49 and 50 are O-rings, and 5
1 is a covering member molded from a synthetic resin material.

In the above switch device, when the shaft 30 is pushed against the expanding force of the return spring 35 and slides upward in FIG. 1, the movable contacts 40,
41 contacts the fixed contacts 44 and 45, and the shaft 3
0 continues to slide upward, the expanding force of the contact spring 38 increases, and the contact between the movable contacts 40, 41 and the fixed contacts 44, 45 is maintained stably.

When the pushing force on the shaft 30 is released, it immediately returns to the state shown in FIG. 1 due to the expanding forces of the return spring 35 and the contact spring 38.

"Effects of the invention" As mentioned above, the switch device of the present invention has a structure that allows the contact plate to be fixed to the insulator, which is pre-attached to the shaft member, with a single touch operation, making it easy to assemble these parts. This makes the work easier and allows automation of mechanical installation.

In addition, since only one insulator is required, the number of parts can be minimized and costs can be reduced, and the contact plate can be fixed after the insulator is attached to the shaft member through automatic assembly. , human oil, grease, and other mold-cutting residue from synthetic resin materials are less likely to adhere to the movable contact.

Furthermore, in the present invention, since the shaft-like member slides on the cylindrical part of the insulator, the insulator and the contact plate always maintain a state at right angles to the shaft-like member, so that each of the plurality of movable contacts Contacts the fixed contact with uniform contact force.

As a result, the switch device becomes extremely advantageous in improving the switch operation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a switch device showing an embodiment of the present invention, FIG. 2 is a front view of an insulator provided in the switch device, and FIG. 3 is a line A--A in FIG.
4 is a front view of the contact plate provided in the switch device, FIG. 5 is a main part configuration diagram showing the contact plate fixed to the insulator attached to the shaft, and FIG. 6 is a conventional example. FIG. 2 is a cross-sectional view of the switch device. 30...Shaft, 31...Switch body, 3
2... Operating chamber, 33... E ring, 37... Insulator, 37a... Shaft cylinder part, 37b, 37c
...Latching claw, 39...Contact plate, 39
a, 39b... Symmetrical arm, 39c... Central hole, 4
0,41...Movable contact, 44,45...Fixed contact.

Claims (1)

[Scope of utility model registration request] A shaft-like member is slidably inserted into the operating chamber of the switch body, and a pushing force is applied so that a portion of the shaft-like member normally protrudes from the opening of the switch body. The insulator is pivotally supported and pressed against a stopper provided on the shaft-like member by a spring force, and a contact plate supported by the insulator, and as the shaft-like member moves backward, the plurality of contact plates A switch device having a configuration in which a movable contact contacts a fixed contact provided in a switch main body includes a shaft cylinder portion on which the shaft-shaped member slides, and a locking mechanism formed on the left and right sides of this shaft cylinder portion. an insulator having an insulator, a contact plate having a central hole to be fitted to the outside of the cylindrical shaft portion, and a locking portion to be locked by the locking mechanism, and a shaft-like member inserted through the cylindrical portion. The insulator is slidably supported on a shaft-like member, and the insulator is brought into pressure contact with a stopper provided on the shaft-like member by a spring force, and the central hole is fitted into the shaft cylindrical portion, and the locking mechanism engages the insulator. A switch device characterized by having a structure in which a contact plate is integrally fixed to an insulator by stopping the contact plate.