JPS6318103Y2 - - 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 type of switch has a bottomed casing with a thread formed on a part of its outer periphery, a pair of fixed contact pieces that fit into the opening of the casing, and are inserted into holes made at the bottom of the casing.
It is comprised of a movable armature rod having a movable armature attached to its end to short-circuit between the pair of fixed armature arms, and a coil spring housed within the housing to spring the movable armature arm toward the fixed armature. ing.

[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 and a locking protrusion connected to the hole; a locking hole approximately in the center; and a curved portion formed on the inside so that one end comes into elastic contact with the contact piece of the movable contact rod; To provide a non-lock type pull switch which is composed of a fixed contact piece that can be inserted into a fixed contact piece mounting hole of a body, and 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 the contact portions are in contact with 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 2a, the switch of this invention has a switch casing 1 made of an insulating material, and a mounting nut 6, which will be described later, is screwed onto most of the outer periphery of this casing. screw to get 11
A through hole 13 is provided in the center of the bottom part 12 to attach the movable contact rod 2, and the diameter is slightly increased on the opening 14 side, and a lid body is formed at the opening and the inner circumferential surface near the opening. 4. A slotted groove 15 and a mounting groove 16 for mounting are provided.

Reference numeral 2 designates a movable contact rod, which includes a metal rod body 23 having a flange 21 at one end and a drawstring attachment hole 22 at the other end, and a cylindrical first insulating member 24 attached in contact with the flange 21 of the rod body. , a cylindrical second insulating member 25 having a flange with a smaller diameter than the inner diameter of the housing inner cavity 17 at the end which is attached slightly apart from this member; It consists of both insulating members 24 and 25 having an outer diameter equal to that of the rod 23 and a cylindrical contact piece 26 that is attached to insulate the rod. It is fixed using

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 locking protrusions 44a,
Locking protrusions 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 portion 53 is curved inward to make contact with the contact piece 26, and the locking protrusions 44a, 44b, 45 of the lid body 4 are located approximately in the center of the entire length.
A, 45b are provided with locking holes 55a and 55b that engage with each other, and a hole 5 that penetrates both the inner and outer pieces is provided on the bent end side.
Terminal portions 57 with openings 6 are formed respectively.

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.
3b, the terminal portion 57 side of the fixed contact pieces 5a, 5b is inserted from the side where the locking protrusions 44a, 44b are formed in the hole, and the locking claws 55a, 55b engage with both sides of the lid body 4. It is attached so as to be supported by the locking protrusions 44a and 44b, and in this state, the contact portion 5
3, an interval slightly narrower than the diameter of the contact piece 26 is formed. Next, insert the rod 23 into the inner cavity 17 from the opening 14 side of the movable switch housing 1, and insert the rod 23 into the through hole 13.
The above fixed contact pieces 5a, 5 are made to protrude further outward.
By heating the opening 14 of the switch casing 1 and curling the lid 4 to which b is attached, the split groove 15 and the softening of the material are used to fit the lid 4 into the mounting groove 16, and the switch casing The assembly is completed by screwing the mounting nut 6 onto the screw 11 of No. 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 armature rod attached to the opening of the casing, regulating the upper limit of movement of the movable armature arm within the casing, and a fixed armature mounting hole and a locking protrusion connected to the hole. a fixed contact piece having a locking hole approximately in the center and a curved part formed on the inside so that one end comes into elastic contact with the contact piece of the movable contact rod, and which can be inserted into the fixed contact piece mounting hole of the cover 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 the drawing]

The figures all show one embodiment of this invention; Fig. 1 is a sectional view of the switch in the break state, Fig. 2a is a sectional view of the switch with the fixed contact piece inserted into the lid body, and Fig. 2a is a sectional view of the switch in the broken state. Figure b is a sectional view of the fixed contact piece, Figure 2c
3 is a cross-sectional view of the lid, and FIG. 3 is a cross-sectional view of the switch in the 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, 45a, 45b... Locking protrusion, 55a, 55b... Locking hole.

Claims (1)

[Scope of utility model registration request] A bottomed housing 1 having a mounting screw 11 formed on the outer periphery, and a movable contact rod 2 that penetrates the bottom 12 of the housing 1 and is attached so that it always springs toward the opening side of the housing with an elastic piece 3. , fixed contact piece mounting holes 43a and 43b, which are attached to the opening 14 of the housing 1 and restrict the upper limit of movement of the movable contact piece rod 2 within the housing, and a locking protrusion 44a connected to the mounting holes; 44b, 45
a, 45b, and a locking hole 5 approximately in the center.
5a, 55b and one end of the armature 2 of the movable armature 2.
A switch comprising fixed contact pieces 5a and 5b which have curved portions formed on the inside so as to come into elastic contact with the fixed contact pieces 5a and 5b which can be inserted into fixed contact piece mounting holes 43a and 43b of the lid body 4.