JPH0126910Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention provides support for a spring for biasing a rotary lever, which has a torsion spring that biases a rotary lever in a predetermined direction. The present invention relates to the structure, and particularly to improving the ease of assembly. This type of support structure for a spring for biasing a rotating lever is used in an automobile door lock device and the like.

(Prior Art) As a support structure for a spring for biasing a rotary lever of this type, the structure used in the torque lock device of Japanese Utility Model Publication No. 55-49400 is known.

As illustrated in FIG.
a cover plate (not shown) that is fixed to the base plate 1 and covers the recess 1b; a pivot pin 3a fixed to the plate; a pivot lever 3 disposed between the base plate 1 and the cover plate and pivoted to the pivot pin 3a; Arranged torsion spring 2
and.

One end 2a of the torsion spring 2 is locked to the locking portion 1a of the base plate 1, and the other end 2b is locked to the rotating lever 3 to bias the rotating lever 3.

(Problems to be Solved by the Invention) In this prior art, the mounting recess 1b of the base plate 1 is formed with a bottom surface. Therefore, it is assembled as follows. A pivot pin 3a is inserted into the recess of the base plate 1 and its lower end is fixed to the base plate 1. Thereafter, the torsion spring 2 is fitted around the pivot pin 3a, and its locking end 2a is engaged with the locking portion 1a of the base plate 1. The rotating lever 3 is fitted onto the upper end of the pivot pin 3a, and the other end 2b of the torsion spring 2 is engaged with the rotating lever 3. Then, a cover plate is placed on the base plate 1, and the upper end of the pivot pin 3a is fixed to the cover plate by caulking or the like.

In this way, the end portion 2b of the torsion spring 2 is engaged with the rotating lever 3, and the rotating lever 3 is in a biased state. Therefore, until the cover plate is fixed to the base plate 1, the pivot pin 3a
The rotating lever 3 that is fitted to the upper end of the
The pivot pin 3a is pushed by the biasing force of the torsion spring 2.
There is a risk of it falling off. Therefore, there was a problem in that fixing the cover plate to the base plate 1 was very complicated.

Therefore, the present invention aims to solve the above problem.

[Structure of the idea]

(Means for solving the problem) In order to solve the above problem, in the present invention, in the conventional device, the recess provided in the base plate is made into a through hole, and the sub-plate fixed to the base plate is A measure was taken to cover the through-holes.

(Function) As a result, after the rotation lever, pivot pin, and cover plate are assembled to the base plate from one end of the through hole, the torsion spring is inserted into the through hole from the other end of the through hole. is disposed, and the sub-plate is fixedly attached to the base plate to close the other end side of the through hole.

As a result, before the torsion spring is assembled, the pivot lever is pivoted on the pivot pin and held between the cover plate and the base plate. In other words, even if the end of the torsion spring is locked, it will not fall off from the pivot pin. Moreover, the sub-plate can be attached to the base plate simply by pushing the end of the torsion spring protruding from the other end of the through-hole into the through-hole. Therefore, ease of assembly is significantly improved.

(Embodiments) Preferred embodiments of the present invention will be described below with reference to the drawings.

As illustrated in FIGS. 1, 3 and 4,
The support structure for a spring for biasing a rotary lever according to the present invention has a base plate 4 made of resin or aluminum formed by molding, and a through hole 4a for attachment is formed in the base plate 4. The through hole 4a is open to each of the upper and lower surfaces 4c and 4d of the base plate 4. Both openings of the through hole 4a are connected to the cover plates 1 attached to the upper and lower surfaces 4c and 4d of the base plate 4, respectively.
5 and a sub-plate 6.

A pivot pin 6a is arranged in the through hole 4a,
Both ends of the pivot pin 6a are connected to the cover plate 1, respectively.
5 and sub-plate 6 by caulking (see Fig. 3). Cover plate 15 for pivot pin 6a
A small-diameter pivot portion 6b is formed at the side end portion 6b,
A rotating lever 7 is pivotally supported on this pivot portion 6b. The rotating lever 7 has a flat plate shape, and the cover plate 1
It is held between the inner surface of the cover plate 15 and the recessed portion 4e on the upper surface of the base plate 4 by the boss portion 15a of No.5.

A torsion spring 5 is fitted around the pivot pin 6a, and one end 5 of the torsion spring 5 is engaged with the rotation lever 7. The other end 5a of the torsion spring 5 is locked to a projection 4b, which is a locking part, integrally formed along the through hole 4a of the base plate 4. The biasing force of the torsion spring 5 biases the rotating lever 7 around the pivot pin 6b. Note that a hole is formed in the sub-plate 6 so as to fit with the projection 4b.

A gap is provided between the windings of the torsion spring 5, and the height of the gap is larger than the width of the base plate in a normal state. Therefore, after assembly, it has a compression force and the rotation lever 7
is elastically urged toward the cover plate 15 side. This prevents the rotary lever 7 from wobbling.

The support structure constructed as described above is assembled in the following manner.

First, the end of the pivot pin 6a is fixed onto the cover plate 15. At this time, the rotating lever 7 is pivotally supported on the pivot portion 6b of the pivot pin 6a, and is held by the boss portion 15a of the cover plate 15. Next, the pivot pin 6a is inserted from the upper surface 4c side of the base plate 4 and placed in the through hole 4a. In this state, the cover plate 15 is fixed to the upper surface 4c of the base plate 4 (see FIG. 3).

By fixing the cover plate 15, the through hole 4a
The opening on the upper surface 4c side is closed. Then,
As shown in FIG. 4 (the cover plate 15 is omitted for convenience of illustration), the torsion spring 5 is fitted into the through hole 4a from the lower surface 4d side of the through hole 4a. One end 5b of the fitted torsion spring 5 is locked to the rotating lever 7, and the other end 5a is locked to the locking portion 4b of the base plate 4 (the state shown in FIG. 4).

After this, the sub-plate 6 is attached on the lower surface 4d of the base plate 4. And the pivot pin 6a
The end of the plate is fixed to the sub-plate 6 by caulking (see Fig. 5).

Therefore, when fixing the sub-plate 6 to the base plate 4, the sub-plate 6 can be attached to the base plate 1 by simply pushing the torsion spring 5, whose end 5a is temporarily fixed to the projection 4b, into the through-hole 4a. . Therefore, since no urging force is applied from the torsion spring, assembly can be easily performed.

Further, a locking portion 4b for the end portion 5a of the torsion spring 5 protrudes from the base plate 4. Therefore, even if the height of the torsion spring 5 is increased so as to have compression force after assembly, the height of the torsion spring 5 is increased before the sub-plate 6 is attached.
The end portion 5a can be locked and held on the base plate 4 without falling off.

In particular, in the modified embodiment shown in FIG. 6, since the protrusion 8 is hook-shaped, there is no fear that the end 5a of the torsion spring 5 will fall off. Then,
Assembly becomes easier.

[Effect of idea]

According to the means taken in the present invention, the recess formed in the base plate for arranging the torsion spring is made into a through hole. Therefore, the assembly is substantially completed before the sub-plate for covering the opening of the through-hole is attached to the base plate. Then,
Since the inside of the through hole can be visually observed when attaching the sub-plate, there is an advantage that incorrect or defective assembly can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view showing one embodiment of the present invention, FIG. 2 is a partial perspective view showing the prior art, FIG. 3 is a sectional view of the embodiment shown in FIG. 1, and FIGS. The figure is a perspective view showing the assembly procedure of the embodiment, and FIG. 6 is a perspective view showing a modified embodiment of the present invention. 4...Base plate, 4a...Through hole, 5...
...Tension spring, 6...Sub plate,
6a... Pivot pin, 7... Rotating lever, 15...
cover plate.

Claims (1)

[Scope of utility model registration request] a base plate having a mounting recess; a cover plate fixed to the base plate;
A pivot pin is inserted into the mounting recess of the base plate and has both ends fixed to the base plate and the cover plate, respectively, and a pivot pin is disposed between the base plate and the cover plate and is attached to the pivot pin. The torsion spring includes a supported rotating lever and a torsion spring disposed around the pivot pin, one end of the torsion spring being locked to the base plate and the other end of the torsion spring being attached to the rotating lever. In the support structure for a rotation lever biasing spring that is engaged with and biases the rotation lever, the recess of the base plate is a through hole, and the sub-plate is fixed to the base plate. A support structure for a rotation lever biasing spring that covers the through hole.