JPS6336908Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a contactor for a rotary switch.
By swingably supporting the contact piece via the lever part on the U-shaped fixed part, it is intended to ensure reliable contact with the opposing contact and to provide high reliability.

Conventionally, as a contact for a rotary switch, a contact piece is supported on a U-shaped or box-shaped fixed part so as to be movable in the dorsal and ventral direction, and a compression coil spring is interposed between the back plate part of the fixed part and the contact piece. , there is one that urges the contact piece to advance toward the inner side of the fixed part.

However, in this case, the contact piece is twisted and locked to the fixed part, and the compression coil spring is unable to advance the contact piece sufficiently, which tends to make the contact between the contact piece and the opposing contact unstable.

In view of these circumstances, the present invention was proposed with the aim of providing a device that can ensure contact with opposing contacts, is highly reliable, has a simple structure, and can be implemented easily and inexpensively. be.

Hereinafter, the present invention will be explained in detail based on the drawings.

1 to 5 show an embodiment of the present invention, and this rotary switch has a rotor 2 inserted into a main body case 1, and a dial 2 outside the main body case 1.
It is used to switch connections by turning it by hand.

The main body case 1 consists of a cylindrical body 4 and a lid 5 that closes the open end of the body 4. A rotor 2 is mounted on the bottom wall 6 of the body 4.
A pivot hole 7 for pivoting is provided therethrough.

The rotor 2 consists of a shaft portion 8 and a flange portion 9, and a pair of arc-shaped opposing contacts 10 are fixedly insulated from each other on the side surface of the distal end of the flange portion 9.

Now, the contactor 11 according to the present invention is fitted into a sickle groove 13 recessed in the inner peripheral surface of the peripheral wall 12 of the body 4 of the main body case 1 in the direction of its generatrix.

As shown in FIGS. 3 to 5, each contact 11 consists of three parts: a U-shaped fixed part 14, a movable part 15, and a compression coil spring 16.

The movable part 15 is composed of a lever part 17 and a contact piece 18 formed by bending the tip end thereof downward. Engagement piece 21 at the base end of
By engaging the lever part 17 with the lower side part 1
It is pivotally connected to the fixed part 14 so that it can be moved up and down on the holder 9.

The engaging piece 21 is formed by bending the base end portion of the lever portion 17 downward.

The compression coil spring 16 is attached to the upper side 2 of the fixed part 14.
2 and the lever portion 17, the movable portion 15 is urged to swing downward, and the contact piece 18 is pressed against the opposing contact.

The upper side 22 of the fixing part 14 is provided with a downwardly protruding protrusion 23 for preventing the compression coil spring from slipping. This protrusion 23 is formed by a burring portion formed by burring processing, and a punched hole 24 of the burring portion is formed as a screw hole into which a lead wire fixing screw 25 is screwed. Further, the tip of the upper side 22 of the fixing part 14 is bent downward to form a compression coil spring escape prevention part 26, and the projection 23 is fitted straightly onto the outside without tilting the upper end of the compression coil spring 16.

Since the lever part 17 is provided with projections 27 for preventing the compression coil spring from slipping, which are bent upward from both sides of the lever part 17, the compression coil spring 16 does not escape from the lower part thereof in the horizontal axis direction of the fixing part 14. Also,
Another protrusion 28 formed by bending the tip of the lower side part 19 of the fixing part 14 upward is inserted into the lever part 1 through an insertion hole 29 formed through an intermediate part near the tip of the lever part 17.
7, the lower part of the compression coil spring 16 does not escape toward the ventral side of the fixing part 14.

Reference numeral 30 indicates a back plate portion of the fixing portion 14, and 31 indicates a sickle portion protruding from both side edges thereof.

It is free to modify a part of the structure of the above embodiment in various ways. For example, as shown in FIG. 6 and FIG. The engaging piece 21 of the lever part 17 formed in a fork shape is inserted into the locking hole 20, and the protrusion 28 of the lower side part 19 of the fixing part 14 and the insertion hole 29 of the lever part 17 are connected. Movable part 15 due to engagement
may be prevented from coming off from the fixing part 14. In addition, as shown in FIGS. 8 and 9, the lower side 1
Instead of the protrusion 28 of 9, an upward protrusion 28 may be punched and formed at the intermediate portion of the lever portion 17 near the tip. Furthermore, the protrusion 23 on the upper side 22 of the fixing part 14
Alternatively, or in addition to this, downward protrusions (not shown) may be formed from both side edges of the upper side portion 22 to prevent the compression coil spring 16 from slipping.

In addition, it is also conceivable to make the opposing contact point 10 a cylindrical semicircumferential surface.

As mentioned above, the present invention has a structure in which the contact piece is swingably supported on the fixed part via the lever part, so that the contact piece and the lever part are not forced together with the fixed part. can be smoothly displaced, the elasticity of the compression coil spring always works effectively, a suitable contact state between the opposing contact and the contact piece is maintained, and a highly reliable rotary switch can be obtained. In addition, it has a simple structure in which only three inexpensive parts are assembled together: a fixing part, an integrally formed lever part and a contact piece, and a compression coil spring. In particular, the fixing part and the lever part are When the two are pivotally connected by engagement between the locking hole and the engagement piece, the structure is much simpler than that using a hinge connection, resulting in extremely high assembly workability, high efficiency,
Moreover, it can be mass-produced at low cost. Furthermore, if a protrusion is provided on one or both of the fixed part and the lever part to prevent the compression coil spring from slipping or escaping, the protrusion can be used to prevent the compression coil spring from slipping or escaping during transportation or when the rotary switch is assembled into the main body case. Prevents the compression coil spring from falling off during installation and subsequent complete disassembly.
The rotary switch assembly work can be performed easily and efficiently.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, with Figure 1 being a vertical sectional side view of the rotary switch, Figure 2 being a plan view of the rotary switch with its lid removed, and Figure 3 being an exploded perspective view of the contact. , FIG. 4 is a side view of the contact, FIG. 5 is a front view of the contact, FIG. 6 is an exploded perspective view of a modified example of the present invention, FIG. 7 is a side view thereof, and FIG. 8 is a diagram of the present invention. FIG. 9 is an exploded perspective view of another modified example of , and FIG. 9 is a side view thereof. 14... Fixed part, 16... Compression coil spring, 1
7... Lever part, 18... Contact piece, 19... Lower side part, 20... Locking hole, 21... Engagement piece, 22...
Upper side, 23...Protrusion, 24...Punching hole, 25
...Lead wire fixing screw, 27, 28...Protrusion, 2
9...Insertion hole.

Claims (1)

[Claims for Utility Model Registration] (1) A lever part is pivotally attached to the base end of the lower side of the U-shaped fixed part so as to be able to move up and down on the lower side, and a contact point extends downward from the tip edge of the lever part. A contact for a rotor switch, characterized in that the piece extends, and a compression coil spring is interposed between the upper side of the fixing part and the lever part to press the lever part and the contact piece downward. (2) A contactor for a rotary switch according to claim 1 of the utility model registration, in which a protrusion for preventing the compression coil spring from slipping protrudes from the lower surface of the upper side. (3) In the rotary switch contactor described in claim 2 of the utility model registration, the downward burring part provided on the upper side constitutes a projection for preventing the compression coil spring from slipping, and the punched hole in the burring part forms a lead. A screw hole into which a wire fixing screw is screwed (4) In the rotary switch contactor according to claim 1, 2, or 3 of the utility model registration, (5) In the rotary switch contactor described in claim 4 of the utility model registration claim, a part of the lever portion is bent upward to form the protrusion. . (6) In the rotary switch contact described in claim 4 of the utility model registration, a part of the lower side of the fixing part is bent upward to form the protrusion, and the protrusion is inserted through the lever part. It protrudes from the hole onto the top surface of the lever part. (7) In the rotary switch contactor described in claim 4 of the utility model registration, projections are formed by bending from both side edges of the lever part, and the tip edge of the lower side of the fixing part is bent upward to form another projection. A protrusion is formed, and this other protrusion is made to protrude onto the upper surface of the lever part from an insertion hole provided in the middle part of the lever part. (8) In the rotary switch contactor according to claim 1, 2, 3, or 4 of the utility model registration claim, a locking hole is provided at the base end of the lower side of the fixing part, A locking piece extending downward from the base end of the lever portion is pivotally connected to the locking hole, thereby pivotally connecting the lever portion to the fixed portion.