JPS6318102Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a switch, and more specifically, to a non-lock type pull switch in which the mounting structure of the fixed contact piece has been improved.

[Conventional technology]

Japanese Utility Model Publication No. 49-9967 discloses a non-lock type pull switch for vehicles, etc., which opens and closes upon operation in order to confirm driving operation.

In this conventional example, in a switch in which a fixed contact plate is fixed by fitting the main body and the holder, one side has an elliptical cross section with a hole for fitting in the short axis direction, and the other side is a perfect circle with a circular hole. This is a stop lamp switch for a vehicle, characterized in that a protrusion is provided at a position where the two protrusions intersect with each other, and the two are fitted together.

This switch has a bottomed casing with a thread formed on a part of its outer periphery, and a pair of fixed contact pieces that fit into the opening of the casing, which are inserted into a hole in the bottom of the casing, and the end a movable contact rod to which a movable contact piece that short-circuits between the pair of fixed contact pieces is attached;
It is comprised of a coil spring that urges the movable arm to the fixed arm.

[Problem that the invention attempts to solve]

In such conventional switches, a pair of fixed contact pieces were inserted into a lid that fits into the housing opening, so post-processing was required to curve the end of the fixed contact piece so that it came into elastic contact with the movable contact piece. It is very troublesome to install, requires a lot of manpower, and has the disadvantage that it cannot be constructed at a low cost.

[Means for solving problems]

This invention aims to eliminate the above-mentioned drawbacks, and its features include a bottomed casing with mounting screws formed on the outer periphery, and a bullet that penetrates the bottom of the casing. a movable arm that is attached to the opening of the housing so that it is always pushed toward the opening of the housing, and a fixed arm that is attached to the opening of the housing that regulates the upper limit of the movement of the movable arm within the housing. A lid body having a mounting hole, a pair of locking claws cut and raised laterally at approximately the center, and a curved portion formed inside so that one end comes into elastic contact with the contact piece of the movable arm rod, the lid body. The present invention provides a non-lock type pull switch which is comprised of a fixed contact piece that can be inserted into a fixed contact piece mounting hole, and which allows free adjustment after assembly.

[Effect]

When this switch is not operated, the elasticity of the elastic piece 3 made of a coil spring or the like causes the movable contact piece rod 2 to rise to a position where its collar 21 contacts the inside of the recess 42 of the lid body 4, and in this state, the fixed contact pieces 5a, 5b The contact portions 53 of both contact the second insulating member 25, and an insulator is interposed between the contact portions 53 of both fixed contact pieces, resulting in a broken state.

Next, by pulling the drawstring a attached to the drawstring attachment hole 22 of the rod body 23, the movable armature rod 2 descends against the elasticity of the bullet 3 such as a coil spring, and the deflection of the bullet is eliminated. Fixed contact piece 5 in the position
The contact portions 53 of a and 5b are in contact with the cylindrical contact piece 26,
A conductor is interposed between the contact portions 53 of both fixed contact pieces, resulting in a make state, and when the pulling force applied to the drawstring a is cut off, the elasticity of the bullet piece 3 returns to the break state, and the make state is locked. There is no.

〔Example〕

An embodiment of this invention shown in the drawings will be described in detail below.

As shown in FIGS. 1 and 2, the switch of this invention has a switch housing 1 made of an insulating material, and a mounting nut 6, which will be described later, can be screwed onto most of the outer periphery of this housing. A screw 11 is formed in the bottom part 12 as shown in FIG. has a slot groove 15 for attaching the lid body 4 and a mounting groove 1.
6 is provided.

Reference numeral 2 denotes a movable contact rod, which is composed of a metal rod 23 having a flange 21 at one end and a drawstring attachment hole 22 at the other end, a cylindrical first insulating member 24 which is attached in contact with the flange 21 of the rod, a cylindrical second insulating member 25 which has a flange at its end which is attached slightly away from the first insulating member and has a diameter smaller than the inner diameter of the housing cavity 17, and a cylindrical contact piece 26 which is fitted into the small diameter portions of both insulating members and is attached so as to be insulated from the rod 23 by both insulating members 24, 25 which have an outer diameter equal to the flange diameter, and both insulating members 24, 25 are fixed to the rod 23 with an adhesive so as not to move.

3 is an elastic piece made of a coil spring or the like; 4 is a lid body made of an insulating member; on one side there is a convex portion 41 whose outer peripheral surface is in contact with the inner surface of the inner cavity 17; is the recessed part 42 that the collar 21 comes into contact with.
on the other side, so that the inner edges of a pair of rectangular fixed contact piece mounting holes 43a, 43b, which are opened at positions equidistant from the center (wider than the outer diameter of the flange 21) and the outer peripheral surface thereof, coincide with each other. A pair of protruding support protrusions 44a,
Expanded portions 45a and 45b are formed at the openings on one side of the mounting holes 44b and the mounting holes 43a and 43b.

5a and 5b are fixed contact pieces made of elastic conductive metal such as phosphorus or bronze, which are folded in half at about 4/7 of the length of the band-shaped conductive member 51, and the end of the inner piece 52 is inserted from the outside to the tip. The contact part 53 is curved inward to make contact with the contact piece 26, and the outer part 54, which is located approximately at the center of the overall length, has a U-shaped cut so that the ends thereof extend sideways. A pair of locking claws 55a and 55b are cut and raised so that the lines intersect and the distance between the tips is slightly narrower than the thickness of the lid body 4.
A terminal portion 57 having a hole 56 passing through both the inner and outer pieces is formed on the bent end side.

Reference numeral 6 denotes a mounting nut made of synthetic resin or the like that is screwed onto the screw 11, and includes a main body portion 61 of the nut and an annular groove 62 into which a mounting member (not shown) is fitted on one side.
A mounting body 63 having a plurality of longitudinal grooves (not shown) on the nut main body side is integrally attached.

The configuration of each part of this switch is as described above, and when assembling, as shown in FIG. The part 57 side is inserted from the expanded part 45a, 45b forming side of the hole,
A pair of locking claws 55a and 55b are attached to engage both surfaces of the lid body 4 and supported by the support protrusions 44a and 44b, and in this state, there is a gap slightly narrower than the diameter of the contact piece 26 between the contact portions 53. is formed. Next, the movable switch housing 1 is inserted into the inner cavity 17 from the opening 14 side, the rod body 23 is made to protrude outward from the through hole 13, and the lid body 4 with the above-mentioned fixed contact pieces 5a and 5b attached thereto is Opening 1 of switch housing 1
By heating and curling 4, groove 1 is formed.
The assembly is completed by fitting the mounting nuts 6 into the mounting grooves 16 by utilizing the softening of the parts 5 and 5, and screwing the mounting nuts 6 onto the screws 11 of the switch housing 1.

As shown in FIG. 1, when this switch is not operated, the elasticity of the elastic piece 3 made of a coil spring or the like causes the movable arm 2 to move its flange 21 into the recess 4 of the lid 4.
In this state, the contact portions 53 of the fixed contact pieces 5a, 5b touch the second insulating member 25.
An insulator is interposed between the contact portions 53 of both fixed contact pieces, resulting in a broken state.

Next, by pulling the drawstring a attached to the drawstring attachment hole 22 of the rod body 23, the movable contact rod 2 descends against the elasticity of the elastic piece 3 such as a coil spring, as shown in FIG. The contact portions 53 of the fixed contact pieces 5a and 5b come into contact with the cylindrical contact piece 26 at the position where the bending allowance of the pieces disappears, and a conductor is interposed between the contact portions 53 of both fixed contact pieces, resulting in a make state. When the retracting force applied to the drawstring a is cut off, the elasticity of the bullet piece 3 causes it to return to the break state as shown in FIG. 1, and the make state is not locked.

[Effect of idea]

As mentioned above, this idea consists of a bottomed casing with mounting screws formed on the outer periphery, and a bullet that penetrates the bottom of the casing and is attached so that it is always fired toward the opening of the casing. a movable contact rod attached to the opening of the casing, which regulates the upper limit of movement of the movable contact rod within the casing, and a lid body having a fixed contact piece mounting hole; a fixed contact piece having a pair of locking claws cut and raised and a curved part formed on the inside so that one end comes into elastic contact with the contact piece of the movable contact piece rod, and which can be inserted into the fixed contact piece mounting hole of the lid body; Since it is composed of
It is easy to attach the fixed contact piece to the lid body, there is no need to bend the contact piece after installation, and this curving process can be made uniform mechanically, so products with uniform quality can be mass-produced. has.

[Brief explanation of drawings]

The figures all show one embodiment of this invention; Fig. 1 is a sectional view of the switch in the break state, Fig. 2 is a sectional view of the switch with the fixed contact piece inserted into the lid, and Fig. 3 is a sectional view of the switch in the broken state. is a sectional view of the switch in a makeup state. 1...Switch housing, 2...Movable contact rod, 3...
... Bullet piece, 4 ... Lid body, 5a, 5b ... Fixed contact piece,
6...Nut, 43a, 43b...Fixed contact piece mounting hole, 44a, 44b...Support protrusion, 45a, 45
b...extension part.

Claims (1)

[Scope of utility model registration request] A bottomed housing 1 having a mounting screw 11 formed on its outer periphery; a movable contact rod 2 that penetrates the bottom 12 of the housing 1 and is attached so as to be always resiliently pushed toward the opening of the housing by means of an elastic piece 3; attached to the opening 14 of the housing 1,
A lid body 4 that restricts the upper limit of movement of the movable contact rod 2 within the housing and has fixed contact mounting holes 43a, 43b, and a pair of locking claws 55a, 55b cut and raised laterally at approximately the center. Fixed contact pieces 5a and 5b are formed with a curved part on the inside so that one end can come into elastic contact with the contact piece 26 of the movable contact piece rod 2, and can be inserted into the fixed contact piece mounting holes 43a and 43b of the lid body 4. Naru switch.