JPH0553064U - Sliding switch - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a sliding switch that prevents insulation failure and short circuit due to abrasion powder. [Structure] The base 6 is embedded with a plurality of fixed contacts 5 and 5 having contact surfaces on the same surface. The movable contact 3 is brought into sliding contact with the contact surfaces of the plurality of fixed contacts 5 and 5 to act as a switch. The base 6 is provided with a recess 6c for accommodating the abrasion powder 9 between the plurality of fixed contacts 5 and 5. The recess 6c has a wear powder 9
6d for separating the fixed contact points 5 and 5 from each other
Is provided.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an improvement of a sliding switch that performs a switch action by sliding contact between a fixed contact and a movable contact embedded in a base.

[0002]

[Prior Art]

 Conventionally, as a sliding switch of this type, for example, a technique relating to the Japanese Utility Model Publication No. 56-28119 publication is generally used. In this structure, a plurality of contact portions having contact surfaces are embedded on the same surface of the insulator, and a movable contact slides on the contact surfaces of the plurality of contact portions to perform a switch function. With such a configuration, each contact portion can be integrally molded with the resin molding die.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technique, abrasion powder generated by the switching action of the movable contact may remain on the insulator surface, resulting in poor insulation between the contact portions. In order to solve such a problem, it is possible to fix by caulking so that a plurality of fixed contacts are projected on the surface of the insulator as in the technique disclosed in Japanese Utility Model Publication No. 2-27475. The production man-hour increased. It is also possible to simply form these fixed contacts integrally with the insulator without fixing them by crimping, but since the height of the insulator and each fixed contact is different, the fitting of the resin molding die and each fixed contact is not possible. It is difficult to fit, and very precise mating accuracy is required. The present invention has been devised in view of the above problems, and a plurality of fixed terminals can be easily arranged on the base without increasing the number of production steps, and the insulation failure and short circuit phenomenon due to abrasion powder can be prevented. The purpose is to provide a dynamic switch.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention embeds a plurality of fixed contacts having contact surfaces on the same surface of a base, and a movable contact slides on the contact surfaces of the plurality of fixed contacts to perform a switch action. In the sliding switch, the base has a recess for accommodating wear powder generated by the contact action of the movable contact and the fixed contact formed between the plurality of fixed contacts, and the recess divides the wear powder. The sliding switch is characterized in that the sliding switch is provided.

[0005]

【Example】

 A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Reference numeral 1 denotes a sliding switch, which comprises a rotatable movable platen 4 having a rotary shaft portion 2 and a movable contact 3, and a plurality of fixed contacts 5 with which the movable contact 3 slides. It has a board 6 and a plurality of connecting conductors 8 having one end connected to the fixed contact 5 and the other end connected to a connector terminal 7. More specifically, the rotary shaft portion 2 and the movable platen 4 are integrally formed of a resin material, and the movable platen 4 has three recesses 4a, and a return spring 4b is provided in each of the recesses 4a. Have The movable contact 3 is elastically supported by the return spring 4b.

The base 6 is integrally molded with a resin material so as to have a contact surface on the same surface and to embed a plurality of concentric arc-shaped fixed contacts 5. In addition, as shown in FIG. 2, the base plate 6 has a ridge 6a formed between the fixed contacts 5 and 5 spaced apart from each other in the diametrical direction and protruding from the contact surface of these fixed contacts 5 and 5 by a height dimension H. is doing. Further, the substrate 6 faces the circumferential end surface 6b of the protrusion 6a, forms a recess 6c between the plurality of fixed contacts 5 and 5, and occurs when the movable contact 3 and the fixed contact 5 come into contact with each other. Store the abrasion powder 9. The recess 6c forms a separating protrusion 6d for dividing the stored abrasion powder 9 between the plurality of fixed contacts 5 and 5. The separation protrusion 6d is formed, for example, in a substantially triangular plate shape that extends in the circumferential direction with the circumferential end surface 6b of the protrusion 6a as the base end.

The separation protrusion 6d may be provided at a recess width of the recess 6c, that is, at a substantially intermediate position between the fixed contacts 5 and 5, and may extend to the vicinity of the upper end surface of the protrusion 6a. desirable.

Next, the operation of the sliding switch 1 having the above configuration will be described. When the movable platen 4 rotates left and right, the movable contact 3 slides on the contact surface of the corresponding fixed contact 5 to act as a switch. As shown in FIG. 4, when the movable contact 3 is brought into conduction with the fixed contact 5 at the position 3a and comes into contact with the circumferential end face 6b when the movable contact 3 is moved to the position 3b, the ridge 6a rides up and becomes non-conductive. It is performed by moving to position 3c. Therefore, the movable contact 3 acts as a switch ON-OFF with reference to the position 3b.

By the way, abrasion powder 9 is generated due to the contact action of the movable contact 3 and the fixed contact 5. The abrasion powder 9 is moved and dropped into the recess 6 c by the movable contact 3. The abrasion powder 9 that has fallen into the recess 6c is divided by the separation protrusion 6d and stored. Therefore, the adjacent fixed contacts 5 and 5 are not electrically connected by the abrasion powder 9 to cause insulation failure or short circuit.

In the above embodiment, the separating protrusion 6d is not limited to the triangular plate shape, and the abrasion powder 9 stored in the recess 6c does not electrically connect between the adjacent fixed terminals 5 and 5. It is sufficient if it can be divided. Such a sliding switch is most suitable for an inhibitor switch or the like that detects the shift position of an automobile transmission.

[0011]

[Effect of the device]

 As described in detail above, according to the configuration of the present invention, a sliding switch is provided in which a plurality of fixed terminals are easily arranged on the base without increasing the number of production steps, and the insulation failure and the short circuit phenomenon due to abrasion powder are prevented. Can be provided.

[Brief description of drawings]

FIG. 1 is an assembled sectional view showing an embodiment according to the present invention.

FIG. 2 is a plan view of the base in FIG.

FIG. 3 is an enlarged perspective view of a main part around a recess in FIG.

FIG. 4 is an enlarged cross-sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Sliding switch 3 Moving contact 5 Fixed contact 6 Base 6c Recess 6d Separation protrusion 9 Wear powder

Claims (1)

[Scope of utility model registration request] 1. A sliding switch in which a plurality of fixed contacts having contact surfaces are embedded on the same surface of a base, and a movable contact slides on the contact surfaces of the plurality of fixed contacts to perform a switch action. A recess for accommodating wear powder generated by the contact action of the movable contact and the fixed contact is formed between the plurality of fixed contacts, and the recess has a separation protrusion that divides the wear powder. Sliding switch characterized by.