JPH0136254Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for operating springs of switches in electrical equipment and various actuators in industrial control mechanisms.

As one type of operating mechanism, a tension coil spring has been used as the operating element recovery spring of a conventional telephone switch. However, there are drawbacks such as there is a limit to miniaturization and the installation work of the recovery spring is cumbersome. There is, and in order to solve it, JP-A-57
In No. 180022, we proposed an improvement method using a compression coil spring as the recovery spring. However, although the compression coil spring was miniaturized, it had to be compressed by a predetermined amount before being pushed into a designated location on the switch frame and lever, so the center of the spring was biased and could not be installed uniquely. There were flaws.

In order to solve these drawbacks, the present invention has a pin with an outer diameter smaller than the inner diameter of the coil protruding from the support seat of the frame to loosely support one end of the working coil spring, and the support seat of the lever. A mounting tool is provided with a passage groove for compressing the coil spring, and the spring housing wall is arranged with a spacing smaller than the coil diameter, and when a predetermined load is applied, the coil passes through due to deformation of the coil part etc. To provide an action spring mounting structure in which a coil spring is held between a pair of seats by forming a protrusion that is possible and does not pop out due to the biasing force of the coil spring.

The present invention will be explained in detail below with reference to the drawings.

Fig. 1 shows a switch to which an embodiment of the present invention is applied; 1 is a frame on which the contact spring group 2 that constitutes the switch is installed; 3 is a lever that drives the contact spring group 2; and 4 is a lever for restoring the lever. It is a coil spring. . One support part 1-1 of the coil spring 4 of the frame 1
In this case, a pin 1-1b having a diameter smaller than the inner diameter of the coil is protruded from a seat 1-1a of a coil spring 4 shown in FIG. On the other hand, the coil spring 4 is placed in the seat 3-1a position of the support end 3-1 of the lever 3 on the seat 3-1a of the coil spring 4 shown in FIG. 3 using a mounting tool 5 as shown in FIG. The passage groove 3-1b is compressed to
A pair of protrusions 3-1d are formed on the opposing housing wall 3-1c in which the coil spring 4 is housed,
This protrusion 3-1d interval L is positioned so that it is smaller than the outer diameter of the coil, and when a predetermined load is applied to the coil spring 4 with the installation tool 5, the coil part is changed and the passage groove 3
-1b, the space between the opposing housing walls 3-1c is expanded (deformed), and after the coil portion passes through, it is dimensioned so that it will not pop out due to the biasing force of the coil spring 4, and serves as a stopper. There is. .

The installation procedure is to insert one end of the coil spring 4 into the pin 1-1b in a natural state, support the other end with the installation tool 5, compress it to the position of the catch 3-1a, and then push it into the protrusion 3-1d. The coil spring 4 is held between the support end 1-1a and the seat 3-1a, and when the installation is completed, the installation tool 5 is released, so that the passage groove 3-
All you have to do is exit through 1b.

In addition, in this embodiment, the seat 1-1a of the frame 1
A pin 1-1b is provided protrudingly in the hole portion 1-1 in which the coil is inserted and the outer diameter is held down, as shown in Fig. 5.
b' may be provided, or may have the same shape as the protrusion 3-1d of the lever 3.

As explained above, according to the present invention, the support end on the frame side supports the coil spring in a loose manner, and the support end of the other end of the lever is provided with a passage groove for the installation tool so that it can be pushed into the coil spring accommodating part. As a result, automatic assembly by robots is possible.

[Brief explanation of the drawing]

Fig. 1 is an external view of a switch to which an embodiment of the present invention is applied, Fig. 2 is a perspective view showing details of the coil spring support part on the frame side, and Fig. 3 shows details of the coil spring support part on the lever side. FIG. 4 is a perspective view showing an example of a coil spring mounting tool, and FIG. 5 is a perspective view showing another embodiment of a coil spring support portion on the frame side. 1... Frame, 1-1... Support part, 1-1a
... Seat, 1-1b... Pin, 1-1b'... Holding hole part, 2... Contact spring group, 3... Lever, 3
-1...Support end, 3-1a...Socket, 3-1b...
...Passing groove, 3-1c...Accommodating wall, 3-1d...Protrusion, 4...Coil spring, 5...Mounting tool.

Claims (1)

[Scope of utility model registration request] In a control mechanism such as a switch having a frame on which a contact spring is mounted, a lever that drives the contact spring, and a coil spring that acts on the lever, the coil spring is supported on either one side of the frame or the lever. One support part is configured to loosely insert and support the coil spring, and the other support part that supports the coil spring on the other side of the frame or the lever is a tool for applying an elastic force to the coil spring. The spring accommodating wall of the seat has a pair of protrusions with an interval smaller than the outer diameter of the coil spring, and the coil spring is arranged between the pair of protrusions. An action spring mounting structure characterized in that the coil spring is configured to be held and housed between the one support end and the seat by pushing the coil spring through the support end.