JPS594518Y2 - Push/pull lock device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a button/button lock device associated with a pause switch of a tape recorder, etc., and in particular,
This invention relates to a device whose structure is simplified to facilitate assembly and reduce material costs.

Traditionally, it has been used as a pause switch for tape recorders, etc.
A bushing-bush locking device as shown in FIG. 1 is widely used.

In other words, this bushing/bushing locking device
A torsion spring 3 and a bush/button lock plate 4 in the shape of a well-known cod drop are fitted and inserted into the support shaft 2 erected on the support shaft 2, and are compressed to form a retaining ring 5 for preventing falling off. is fixed to the upper end of the support shaft 2.

One end of the torsion spring 3 is connected to a locking pin 6 set on the base plate 1, and the other end is connected to a locking piece 7 that hangs down to the rear of the lock plate 4. is biased upward in the A direction, and rotationally biased counterclockwise around the support shaft 2.

A well-known lock notch 7a and a rising piece 8 are provided in front of the lock plate 4.

In the button/button locking device having such a structure, when the operating rod 9 associated with the pause button etc. is pushed in, the pin 10 thereon moves along the periphery of the locking plate 4 in the pushing direction, and its effect is As a result, the lock plate 4 rotates clockwise about the support shaft 2 against the elastic force of the torsion spring 3.

In this way, the pin 10 is guided to the lock notch 7a, and when the operating rod 9 moves back by releasing the push-in operation, it engages with the upright piece 8 in the lock notch 7a and stops.

That is, the operating rod 9 does not completely return to its original position.

Next, when the operating rod 9 is pushed in again, the pin 10 is released from the upright piece 8, and the lock plate 4 rotates counterclockwise. ,
The pin 10 goes under the upright piece 8, and due to the return action of the spring of the operating rod 9 itself, the operating rod 9
completely returns to its original position.

That is, the locking and unlocking actions of the buttons of the operating rod 9 are performed.

By the way, in such a conventional bushing/button locking mechanism, the metal spindle 2 on which the torsion spring 3 is mounted is planted on the base plate 1, and the retaining ring 5 for holding the lock plate 4 etc. is attached to the end of the spindle 2. It is necessary to fix the retaining ring 5 to the retaining ring 5, which not only makes the work extremely troublesome, but also increases costs due to the use of the retaining ring 5.

Furthermore, a torsion spring 3, a lock plate 4 and a retaining ring 5
There is a problem in that by stacking these on the same support shaft 2, the vertical dimension increases, and the height of the mechanical chassis and the entire device inevitably increases.

Furthermore, although there is a support shaft 2 that has a flange protruding from its upper end to prevent it from being pulled out, it is not only troublesome to attach the torsion spring 3 etc. to the support shaft 2, but also because of the size. Problem not resolved.

The present invention was developed in view of these conventional problems, and in particular, the torsion spring and lock plate are attached to separate support shafts, and the lock plate is easily attached to and detached from the support shaft that is integrated with the board. To provide a bush-bush locking device which is easy to assemble and has a simple structure, which is configured so that the torsion spring applies vertical and rotational forces to the lock plate without any attachment.

FIG. 2 is a perspective view showing a specific example of the bushing and bushing locking device according to the present invention.

In the figure, 11 is a torsion spring 14 installed on the base plate 13.
One end of the torsion spring 14 supported by this support shaft 21 is engaged with a locking pin 15 set on the base plate 13, and the other end is connected to a locking plate to be described later. It is locked to.

Further, the substrate 13 is provided with a cylindrical support shaft 12 that is integrally formed with the substrate 13 from synthetic resin and separate from the support shaft 11. 3
As shown in the figure, there is a roughly rectangular protrusion 1 on the top end to prevent it from falling off.
6 is provided so as to protrude in the outer circumferential direction.

A lock plate 17 is inserted through this support shaft 12 and is rotatably held therein.

That is, the lock plate 17 has a center hole 18 for rotation as shown in FIG. 3 near the rear thereof, and a notch 19 that is continuous with the center hole 18 and is large enough to allow the projection 16 to be inserted therethrough. is provided.

The lock plate 17 is rotatably attached to the support shaft 12 as shown in FIG. 2 by inserting the through hole 18 into the support shaft 12 so that the protrusion 16 passes through the notch 19.

Incidentally, reference numeral 20 denotes a holding plate protrudingly provided on the base plate 13 around the support shaft 12, which functions to support the lock plate 17 from below and hold it substantially horizontally.

However, the retaining plate 20 is provided in front of the support shaft 12 so that the rear part of the lock plate 17 is allowed to be lowered by an operation described later.

Reference numeral 21 denotes an L-shaped locking piece protruding around the base of the lock plate, and the other end of the torsion spring 14 is locked to this locking piece 21, so that the lock plate 17 can be rotated clockwise at all times. It is dynamically energized.

What is important here is that the position at which the other end of the torsion spring 14 is locked by the locking piece 21 is set higher than the position at which the lock plate 17 is supported by the support shaft 12;
This allows a downward elastic force to be applied to the front portion of the lock plate 17.

Reference numeral 22 denotes a regulating pin that regulates its rotation, and is planted on the substrate 13.

Reference numerals 23 and 24 designate lock notches and upright pieces similar to those already described, and the shapes of their peripheries are almost the same as those shown in FIG.

Reference numeral 25 denotes an operating rod related to the pause button, and an operating element 26 is formed in the vicinity of its tip so as to be bent.

Further, as shown in FIG. 4, the end of the operating rod 25 is bent, and passes through the through hole 27 of the base plate 13 and becomes part of the rotating plate 28 movably attached to the lower part of the base plate 13. is engaged with the part.

A pinch roller 29 is rotatably attached to the rotary plate 28.

Next, the operation of the bushing and bushing lock device having the above structure will be described.

First, when the operating rod 25 is pushed in the direction of the arrow, the operating element 26 comes into contact with the front edge of the lock plate 17, but by continuing to push it, the lock plate 17 is moved around the support shaft 12 and the torsion spring 14 Forcibly rotate counterclockwise against the force of.

When the operator 26 reaches the lock notch 23, the operator 2
6 is released, the operating element 26 is locked in the lock notch 23 near the upright piece 24, and the operating rod 25 is temporarily held in its original position.

Note that, at this time, the lock plate 17 is biased in the downward direction by the above-described action of the torsion spring 14 .

Next, when the operating rod 25 is pushed in again, the lock plate 1
7 is always biased counterclockwise, so the operator 26
The engagement in the vicinity of the upright piece 24 is released.

When the pushing operation is released, the operating element 26 slips into the lower part of the upright piece 24, and the operating rod 25 returns to its original position before operation due to the restoring force of the spring or the like.

In this way, the operation of locking and releasing the button is accomplished.

Again, what is important here is to place one end of the upper part of the torsion spring 14 above the support point of the lock plate 17, so that the front part of the lock plate 17 can be elastically lowered and operated. This can effectively act on the child 26.

By adopting such a configuration, the lock plate 17
To form a bushing/bushing locking device with a simple configuration and easy assembly without using a retaining ring for holding the bushing.

As described above, according to the present invention, there is provided an operating rod that is provided so as to be able to reciprocate in parallel to a base plate that is equipped with a support shaft that has a protrusion to prevent falling off at the tip, and a through hole that can be inserted into the support shaft. a bushing/button locking plate having a notch through which the protruding piece is inserted, and a support portion formed as a supporting shaft into which a torsion spring is inserted, which is provided on the base plate at a position close to the supporting shaft. and one end of the torsion spring is locked to the board side, and the other end is locked to the bushing/button locking plate, and a biasing force is applied to the bushing/buttonlocking plate in the vertical direction and the rotational direction. By providing this, assembly man-hours are reduced and serviceability is improved.

Additionally, the cost of materials can be reduced by eliminating the retaining ring.

Furthermore, since the torsion springs and lock plates are not stacked vertically on the support shaft as in the prior art, there are various practical advantages such as the ability to reduce the thickness of the entire device such as a tape recorder.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional bushing and bushing locking device, Fig. 2 is a perspective view of a bushing and bushing locking device of the present invention, Fig. 3 is a perspective view of the main parts, and Fig. 4 is a perspective view of the main parts. FIG. 12... Support shaft, 13... Board, 14...
... Torsion spring, 15 ... Locking pin, 16 ... Fall prevention protrusion, 17 ...
Bush/Butush lock plate, 18......through hole,
19...notch, 25...operating rod.

Claims (1)

[Scope of utility model registration request] An operating rod provided with a support shaft having a drop-preventing protrusion at the tip so as to be able to reciprocate in parallel to the base plate, and a notch having a through hole into which the support shaft can be inserted and into which the protrusion is inserted. and a support portion into which a torsion spring provided on the substrate at a position close to the support shaft is inserted, one end of the torsion spring being locked to the substrate side. and the other end thereof is locked to the bushing/button locking plate to apply biasing forces in the vertical direction and rotational direction to the bushing/buttonlocking plate.