JPH0215224Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanism for preventing erroneous operation of a slide switch.

Conventionally, there are slide type switches that attempt to prevent erroneous operation due to overrun by varying the magnitude of the operating force induced in each position. However, the slide type switch is prone to erroneous operation when operated roughly. Further, depending on the setting location or operating direction, it may be difficult to confirm the position of the knob. For example, in the case of a front-rear sliding hazard park switch 2 disposed on a steering column 1 of an automobile as shown in FIG. 1, the switch position can be determined based on the position of the knob of the hazard park switch 2. This is difficult because the handle slides back and forth in the axial direction.
The conventional slide-type hazard park switch 2 makes the necessary operating force from the N position to the H position and from the N position to the P position larger than the operating force from the H position to the N position and from the P position to the N position. This prevents erroneous operation of the hazard park switch 2 due to running. The hazard park switch 2 is set to H.
If you perform a rough operation from the N position to the N position, or use excessive force from the N position to the P position, the hazard park switch 2 knob will likely overrun to the P position without stopping at the N position. .
Due to this erroneous operation, a park switch not equipped with an indicator may be left in the switched-on state, which may cause the battery to run out.

The mechanism for preventing erroneous operation of a slide switch according to the present invention was devised to solve the above-mentioned problems, and by forming a stepped part on the movable plate and a stepped part on the pole plate, the above-mentioned problems are solved. It is intended to.

Hereinafter, the slide switch erroneous operation prevention mechanism according to the present invention will be explained in detail based on FIGS. 2, 3, and 4.

In FIGS. 2, 3, and 4, reference numeral 3 designates a switch case, which has an opening 3a in the center of its upper surface for moving a knob 4a forward and backward, and a pole plate 5 is fixed below. 4 is a movable plate, switch case 3
and the pole plate 5. The movable platen 4 has a protruding knob 4a at the center of its upper part, and a stepped portion 4b at the shoulder of the knob 4a. The stepped portion 4b is a stopper formed in pressure contact with the edge of the opening 3a of the switch case 3 to prevent sliding movement. The movable platen 4 has a moderation ball protrusion 4c having a rib-shaped portion at its lower end, and the protrusion 4c
A spring insertion hole 4d is bored in the center.
The spring insertion hole 4d is a hole that holds a moderation spring 7a for imparting elastic movement to the steel ball 6. A contact support protrusion 4e for supporting the movable contact 8 is formed at a position facing the moderation protrusion 4c having an insertion hole 4d drilled in the lower surface of the movable platen 4. The contact support protrusion 4e has a spring insertion hole 4f in the center, and contact insertion holes 4g on both sides of the spring insertion hole 4f. The spring 7b is a coil spring for applying a pressing force to the movable contact 8, and is inserted into the spring insertion hole 4f. Movable contact 8 has contact insertion hole 4g
, and is held between the spring 7b and the pole plate 5, and is always in pressure contact with the pole plate 3 due to the elasticity of the spring 7b. The pole plate 5 has three moderation grooves 5a,
5b and 5c, and step portions 5d and 5e having ribs are formed.

The slide switch erroneous operation prevention mechanism according to the present invention has the above-mentioned configuration.

Next, the operation of the slide switch erroneous operation prevention mechanism according to the present invention will be explained in detail with reference to FIGS. 2, 3, and 4.

In FIG. 2, the knob 4 is located at the center position of N. That is, the steel ball 6 is fitted into the central moderation groove 5b. The steel ball 6 is fixed to the pole plate 5 by the moderation spring 7a.
is pressed against the moderation groove 5b. The movable contact 8 is pressed against the pole plate 5 by a spring 7b. The movable platen 4 is pressed against the upper inner surface of the switch case 3 by a moderation spring 7a and a spring 7b. The knob 4a protruding from the opening 3a of the switch case 3 cannot slide leftward because the stepped portion 4b is in contact with the edge of the opening 3a.

FIG. 3 is a sectional view when the movable platen 4 shown in FIG. 2 is slid to the right to the H position. The sliding movement at this time is prevented by the side surface of the movable platen 4 coming into pressure contact with the inner surface of the switch case 3 and the opening 3a. Then, the steel ball 6 moves from the moderation groove 5b to the moderation groove 5a,
The moderation projection 4c slides on the surface of the stepped portion 5d, and the movable contact 8 slides on the surface of the pole plate 5. Lower end 4 of movable platen 4
h contacts the surface of the stepped portion 5e. Therefore, the movable platen 4 at the H position is prevented from moving upward or downward by contacting the stepped portions 5d and 5e. When returning the knob 4a from the H position to the N position, the knob 4a is slid to the left to the N position. Then, the stepped portion 4b corresponds to the opening 3a of the switch case 3, and the operation of the knob 4a is blocked.
Overruns are prevented.

FIG. 4 is a sectional view when the movable platen 4 shown in FIG. 2 is pushed and slid to the left to the P position. When the knob 4a is pushed, the steel ball 6 is inserted into the spring insertion hole 4a.
Then, the movable contact 8 is inserted deeper into the contact insertion hole 4g. Then, when the knob 4a is pushed and slid toward the left P position, the stepped portion 4b comes into contact with the inner surface of the switch case 3,
The steel ball 6 moves from the moderation groove 5b to the moderation groove 5c.
Then, the movable contact 8 slides on the pole plate 5. and,
When moving the knob 4a from the P position to the N position,
It can be moved only by the operating force of sliding it in the right N direction. When the knob 4a returns from the push position P to the N position, the steel ball 6 moves from the moderation groove 5c to the moderation groove 5b, the step 4b that was in contact with the inner surface of the switch case 3 comes off, and the knob 4a rises to a normal height corresponding to the height of the stepped portion 4b. Therefore, when the knob 4a is operated and moved from the P position to the N position, the knob 4a rises, making it possible to accurately know the position of the knob 4b.

The mechanism for preventing erroneous operation of a slide switch according to the present invention has the structure and operation as described above, and has the following advantages.

That is, by forming the stepped portion 4b on the movable platen 4 and the stepped portions 5e and 5d on the pole plate 5, the operation of the knob 4a can be divided into the operating force by pushing and sliding, and the movement by only the sliding operating force. This makes it possible to prevent switch operation overruns. Further, by varying the height of the knob 4a during operation of the knob 4a using the moderation spring 7a, the spring 7b, and the stepped portion 4b, it is possible to more accurately know the operating position of the knob 4a. . Therefore, the operator can slide the knob 4a without erroneously using the sense of the fingertips without visually recognizing the knob 4a.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional automobile hazard park switch. Figures 2, 3, and 4 are drawings showing the mechanism for preventing erroneous operation of the slide switch according to the present invention. Figure 2 is a sectional view when the knob is in the N position, and Figure 3 is a sectional view when the knob is in the H position. FIG. 4 is a sectional view with the knob in the P position. 1...Steering column, 2...Hazard park switch, 3...Switch case, 4...
Movable plate, 4a...knob, 4b...step, 4c...
Protrusion for moderation ball, 4e... Protrusion for contact support, 4g
...Contact insertion hole, 5...Pole plate, 5a, 5b, 5c
... Moderation groove, 5d, 5e... Step portion, 8... Movable contact.

Claims (1)

[Scope of utility model registration request] A slide type switch having a movable plate having a movable contact that slides on the pole plate, the pole plate having three moderation grooves for locking the movable plate, and the pole plate being inserted into the movable plate. A moderation spring for urging a steel ball that presses into the moderation groove, a movable contact inserted into the movable plate via the spring, and an opening of the switch case when operating the knob in one direction from the center operating position. There is a step formed on the shoulder of the movable plate to prevent the knob from sliding due to collision with the lower end of the movable plate when the knob is slid from the center operating position to the other side. The switch case has a stepped portion formed on the pole plate to prevent the knob from being pushed by the movable plate, and a switch case whose internal height is higher than the height from the bottom of the movable plate to the stepped portion. A mechanism to prevent erroneous operation of the slide switch.