JPH074749Y2 - Lever switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention swings and displaces a leaf spring movable contact piece by swinging an operating lever to open and close a normally open contact and a fixed contact.
The present invention relates to improvement of a lever switch.

[Prior Art] Conventionally, as a lever switch of this type, for example, there is a technology according to Japanese Utility Model Laid-Open No. 58-150235. In the vehicle lever switch, this is a configuration in which the rod moves up and down in the same direction as the swing direction of the operating lever, and the movable contact piece is pushed down by the lowering of the rod and comes into contact with the fixed contact piece.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technique, when the movable contact piece is welded to the fixed contact piece, there is a problem that the conductive state is maintained without separating even if the rod is lifted. .

[Means for Solving Problems] The present invention has been devised in view of the above problems, and includes an operation lever supported so as to be swingable in a predetermined direction, and the operation lever according to the swing of the operation lever. A contact piece actuating member that horizontally slides; a movable contact piece that has a normally open contact and is oscillatingly displaced in the moving direction of the contact piece actuating member in accordance with the movement of the contact piece actuating member; A contact and a fixed contact that are spaced apart and face each other are provided, and the contact piece actuating member presses the movable contact piece to force the normally open contact of the movable contact piece to be separated from the fixed contact. To solve the above problems, a lever switch having a pusher and having the forced pusher projecting near the normally open contact and hanging down is formed.

[Operation] According to the above configuration, even when the movable contact and the fixed contact are welded, the two contacts are forcibly separated from each other to turn off the switch to ensure a reliable switch operation. A good lever switch can be provided.

[Embodiment] A preferred embodiment according to the present invention will be described with reference to the accompanying drawings by an example applied to a vehicle dema passing switch.

Reference numeral 1 is a support member, 2 is a movable bracket rotatably supported in a shaft support hole 1a of the support member 1, 3 is a center shaft, 4 is the center shaft 3
It is an operation lever that is rotatably fitted.

The operation lever 4 is pivotally supported on the movable bracket 2 by a support pin 5 so as to be vertically swingable, and a ball 7 urged by a compression spring 6 is attached to a moderation mountain 2a formed on the movable bracket 2 at a tip position thereof. They are engaged to form a moderation mechanism.

Reference numeral 8 denotes a latching case mounted on the support member 1, and a latching cam 9 is rotatably supported by a support shaft 9a. An operating pin 11 urged by a compression spring 10 is fitted on the lower surface of the latching cam 9, and the operating pin 11 is in contact with a swinging movable contact piece 12. 13 and 14 are movable contacts
These are fixed contacts that come into contact with and switch to the twelve movable contacts 12a, 12b. In addition, on the latching cam 9, on the left and right of the upper surface,
Engagement grooves 9b and 9c having two substantially V-shaped groove surfaces are formed. Above the latching cam 9, the upper surface of the support member 1 is provided.
The slider 16 is urged toward the actuating portion 4a side of the operation lever 4 by the compression spring 15 from 1b so as to be vertically movable within the movable platen 17.

The movable plate 17 has an insertion hole 17a formed through the two support pins 1b provided upright on the upper surface of the support member 1 so as to be supported in a vertically movable manner. Is forming.

A push rod 18 formed in a substantially T-shape is interposed between the canopy 17b of the movable plate 17 and the seat 16a.

The push rod 18 is provided with a head portion 18a and a support shaft 18b in a direction perpendicular to the head portion 18a so as to be vertically movable and swingable.
And is fitted into a groove (not shown) formed on the inner wall surface of the slider 16. The push rod 18 is the rod
18c hangs from the seat 16a of the slider 16 and faces the engaging grooves 9b and 9c of the latching cam 9. Thus, the push rod 18 is supported by the movable plate 17 so as to be vertically movable and swingable and biased in the pressing direction of the movable plate 17.

Reference numeral 19 denotes a contact piece actuating member, which is guided by a guide groove 1c formed on the upper surface inside the support member 1 and horizontally slides in conjunction with the movement of the operation lever, as shown in FIG. An engaging elongated hole 19a extending in the left-right direction orthogonal to the axial direction of the operating lever 4 is formed through one end of the contact piece actuating member 19, and the engaging elongated hole 19a is provided below the operating lever 4. The first operating rod 4b protruding from is inserted and engaged.
The other end of the contact piece actuating member 19 has a movable contact piece to be described later.
An actuator 19b for activating 20 and a force pusher 19c on the back side of the movable contact piece 20 for pressing the movable contact piece 20 in order to forcibly separate the normally open contact 20a from the fixed contact 22a. is doing. The movable contact piece 20 is made of an elastic plate material, one end of which is fixed to a support material 28 arranged on the base 21, and the other end of which is a normally open contact 20.
a is stuck. In the fixed contact piece 22 arranged on the base 21,
The fixed contact 22a is fixed so as to face the normally open contact 20a. The movable contact piece 20 is oscillated and displaced in the moving direction of the contact piece actuating member 19, and in the normal state, is biased by a self-elastic force in a direction in which the normally open contact 20a and the fixed contact 22a are separated. Center axis 3
Has a knob 23 fixed to one end and an operating body 24 fixed to the other end. The operation body 24 is provided with a second operation rod 24a projecting downward, penetrating through the escape slot 19d in the contact piece actuating member 19 and hanging into the support member 1. The escape elongated hole 19d extends in the same direction as the engaging elongated hole 19a and is formed so as to penetrate therethrough. 2
5 is a movable contact board, and as shown in FIG.
By being guided by the guide groove 1d formed in the support member 1, 5a slides in the left-right direction orthogonal to the contact piece operating member 19. An engaging groove 25b extending in the moving direction of the contact piece actuating member 19 is formed on the upper surface of the movable contact point board 25, and the second operating rod 2
4a is fitted and engaged. Further, a movable contact plate 26 is fitted on the lower surface of the movable contact board 25, and the switch is opened / closed in association with the fixed contact 27 to function as a light switch.

Thus, the contact actuating member 19 and the movable contact board 25 are in an overlapping relationship with each other, and can be easily assembled by only inserting from the base 21 side.

Next, the operation of the above configuration will be described.

When the operating lever 4 is in the M position shown in FIG. 1 and the latching cam 9 is in the state shown in FIG. 2, the movable contact 12a is in contact with the first fixed contact 13 and the main lamp lighting circuit (not shown). No) works. Now operate the operating lever 4 and press M
When the movable platen 17 is lifted from the position toward the D position, the movable platen 17 starts to descend against the biasing force of the compression spring 15 and presses the slider 16 and the push rod 18. As the push rod 18 descends, the tip of the rod portion 18c comes into contact with the engagement groove 9b on the right side of the latching cam 9, so that the tip can move to the right along the surface of the engagement groove 9b.

Therefore, when the movable platen 17 is further lowered, the push rod 18 presses the latching cam 9 while tilting to the right side from the neutral position as shown by a virtual line in FIG. Thus, the latching cam 9 moves over the movable contact piece 12 while the operating pin 11 moves backward, and is reversed to the left. Then, the movable contact 12a of the movable contact piece 12 separates and the movable contact 12b switches to contact conduction with the second fixed contact 14. At this time, the Dima lamp lighting circuit (not shown) operates. When the operating lever 4 is lifted to the D position, the first operating rod 4b moves the contact piece actuating member 19 to the knob 23 side through the engaging elongated hole 19a. Thus, the actuator 19b presses the movable contact piece 20 to bring the normally open contact 20a into contact with the fixed contact 22a.

After that, when you release your hand, the operating lever 4 moves to the ball 7 and the moderation mountain.
When the detent mechanism consisting of 2a is returned to the neutral position, the push rod 18, slider 16 and movable plate are automatically returned to the M position.
17 is also automatically returned to the state shown in FIG. 2 by the pressing force of the compression spring 15. At the same time, the contact piece actuating member 19 also returns to the state shown in FIG. Thus, the movable contact piece 20 automatically returns by its own elastic force to separate the normally open contact 20a from the fixed contact 22a.

When the operating lever 4 is operated again to the D position, the rod portion 18c of the push rod 18 is locked by the locking groove 9 on the left side of the latching cam 9.
By pressing the c surface, the movable contact 12a of the movable contact piece 12 is switched to contact conduction with the first fixed contact 13.

As described above, only when the operation lever 4 is operated to the D position, the normally open contacts 20a and the fixed contacts 22a come into contact with each other, and the passing operation can be performed. Further, even when the welding phenomenon occurs between the normally open contact 20a and the fixed contact 22a, the forced pressing element 19c of the contact actuating member 19 forcibly presses the movable contact piece 20 in the lateral direction, and the normally open contact 20a. Is separated from the fixed contact 22a.

On the other hand, when the knob 23 is rotated, the operating body 24 fixed to the tip of the center shaft 3 also rotates. Thus, the second operating rod 24a moves the movable contact point board 25 in the left-right direction through the engagement groove 25b to bring the movable contact point plate 26 as a light switch into contact with and separate from the fixed contact point 27.

Further, when the operation lever 4 is operated to swing from the neutral position N shown in FIG. 3 to the left turn signal position L or the right turn signal position R, the movable bracket 2 rotates with reference to the shaft support hole 1a of the support member 1 and turns. Activate the signal switch (not shown).

[Effects of the Invention] As described in detail above, according to the present invention, even when the movable contact and the fixed contact are welded together, the two contacts are forcibly separated from each other to ensure a reliable switch operation. A lever switch having good properties can be provided. Especially, in the present invention,
Since a forced presser for forcibly separating the normally open contact of the movable contact piece from the fixed contact was provided so as to project near the normally open contact and hung down, it was forced to the welding part between the normally open contact and the fixed contact. The force from the pressing element is directly applied, the welded portion between both contacts is easily separated and opened, and the movable contact piece may have the existing shape.

[Brief description of drawings]

1 to 4 show an embodiment of a lever switch according to the present invention. FIG. 1 is a sectional assembly view, FIG. 2 is a sectional view taken along the line AA of FIG. 1 is a sectional view taken along line BB in FIG. 1, and FIG. 4 is an exploded perspective view in which constituent members such as a contact piece actuating member are enlarged. 4 ... Operating lever, 4b ... First operating rod, 19 ... Contact piece actuating member, 19a ... Engaging slot, 19b ... Actuator, 19c ... Force pusher, 20 ... Movable contact piece, 20a: Normally open contact, 22a: Fixed contact.

Claims (1)

[Scope of utility model registration request] 1. An operating lever rotatably supported in a predetermined direction, a contact piece actuating member which slides horizontally in response to the operation lever swinging, and an actuating piece actuating member moves in response to the movement. The contact piece actuating member includes a movable contact piece that is oscillatingly displaced in the moving direction of the contact piece actuating member, and that has a normally open contact point; However, in order to forcibly separate the normally open contact of the movable contact piece from the fixed contact, it has a force pressing element that presses the movable contact piece, and the force pressing element projects near the normally open contact. A lever switch characterized by being drooped.