JPS603522Y2 - Variable resistor with push-lock mechanism and click - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a clickable variable resistor with a bush locking mechanism.

Recently, in audio equipment such as car stereos (car components), emphasis has been placed on making the entire equipment smaller due to not only performance but also space factors, and the variable resistors used in equipment sets have also become smaller. There is a strong demand for development toward miniaturization.

However, if the overall size of the device is made smaller, a problem arises in that when several variable resistors are used in a device set, the spacing between the knobs of the variable resistors becomes narrower, making manual adjustment difficult.

Therefore, a button lock mechanism was proposed, in which the knob is locked and stored in the equipment set when the variable resistor is not adjusted or not adjusted, and the knob is removed and adjusted only when adjustment is required. It is liked by many as it is unique.

Therefore, the purpose of this invention is to provide a variable resistor with a button lock mechanism that has a click mechanism that can be most miniaturized, has a small number of parts, and is easy to assemble. That's true.

A first embodiment of this invention is shown in FIGS. 1 to 5.

That is, this variable resistor with a bush locking mechanism and click is composed of a bush locking mechanism A, a resistor main body B, and a click mechanism C.

In the bush locking mechanism A, a case 5 is attached to the resistor body B. At the bottom of the outer side of the case 5, there is a step stud 9 tightened to the case 5 as shown in FIG. A metal lock plate 8 is provided, and a torsion spring 10 is interposed to press the lock plate 8.

In FIG. 2, the terminal 10-1 of the torsion spring 10 is hooked on the cut-and-raised portion 5-1 of the case 5, and the other terminal 10-2 is inserted into the hole in the lower part 8-d of the lock plate 8. Therefore, the lock plate 8 is always connected to the torsion spring 10.
The spring force acts to return the step stud 9 in the opposite direction, and the stopper cut-and-raised portion 5-2 formed in the case 5 locks it.

Further, the lock plate 8 can be raised to the outside of the case 5 by the portion of the torsion spring 10 that is wound around the step stud 9 in a coil strip.

On the other hand, inside the case 5, a click spring 3 is inserted into the operating shaft 4 that passes through the resistor body B, and the locking groove 1-1 of the drive piece 1 is inserted into the locking collar 4-1 at the tip of the operating shaft 4. are fitted and connected.

A spring 6 is provided at the rear of the drive piece 1 between it and the case 5, a pin 1-a of the drive 1 protrudes from the side of the case 5, and a lid 7 is attached to the case 5.

To explain the operation of this bush lock mechanism, the operating shaft 4
is pushed (in the direction of arrow P) to move the drive piece 1 while compressing the spring 6.

As a result, the pin 1 fixed to the drive piece 1 in FIG.
-a moves to the push-off position of the button operation of the operating shaft 4, and contacts the guide surface 8-c of the opening plate 8, the detent hook 8-g, and the opposite hook 8-f, and sets the lock 8 in a stepped position. It rotates around the stud 9 as a fulcrum.

Then, when the bushing operation is released, the drive piece 1 attempts to return to its original position due to the pressure of the spring 6, but as mentioned above, the lock plate 8 is brought into contact with the protruding pin 1-a of the drive piece 1 due to the action of the torsion spring 10. In addition, since the hook portion 8-g and the hook portion 8-f of the lock plate 8 are dimensioned to protrude from the hook portion 8-g, the pin 1-a is latched to the hook portion 8-g and locked. (Figures 3 and 4)
figure).

Then, when the operating shaft 4 is operated again, the pin 1-a is moved to the raised guide portion 8-b formed by cutting and raising the lock plate 8.
This guide portion 8-b is cut and raised at a certain angle as shown in Fig. 1, so if the bushing operation is released in this state, the lock plate 8 will be lifted up by the pin 1-a and returned to its original position. become.

The fully returned normal state is shown in FIGS. 1 and 2, and the locked state is shown in FIGS. 3 and 4.

As a result, it has the function of locking by pressing and unlocking by pressing.

Next, the click spring 3 inserted into the operating shaft 4 of the click mechanism C bends a metal plate into a curved shape, forms a non-circular hole 3a in the center that engages with the operating shaft 4, and has a protrusion 3- It is an elastic body formed with 1.

Opposed to this, a groove 2-1 is formed in the mounting plate 2 of the resistor body B, and the drive piece 1 is constantly pressed by the spring 6, so that the click spring 3 is caused by the protruding column 1-3 of the drive piece 1. Pushed by the formed concave abdomen 1-2,
As a result, the click spring 3 comes into elastic contact with the mounting plate 2, and when the operating shaft 4 is rotated, the click protrusion 3-1 of the click spring 3
When it falls into or crosses the groove 2-1 of the mounting plate 2, a click feeling can be obtained.

On the other hand, when a large pulling force (to release the button) is applied to the operating shaft 4, the drive piece 1 covers the click spring 3, so the drive piece 1 and the mounting plate 2 can prevent the click spring 3 from being crushed. In addition to protecting the click spring, it also prevents plastic deformation of the click spring, ensuring a constant click feel.

With this configuration, click contact can be obtained by the drive piece 1 pushing the click spring 3 inserted into the operating shaft 4, so the number of additional parts is minimized and assembly is simple.

In addition, the click structure can be obtained with one click spring 3,
Moreover, since the driving piece 1 covers the click spring 3 and utilizes the pressing force of the spring 6 from the rear, the protruding column 1-3 of the driving piece 1 only needs to have a dimension equal to the bending height of the click spring 3. Even when the bush locking mechanism A is equipped with a click, the minimum dimensions can be obtained, so miniaturization is possible.

Furthermore, by increasing the number of grooves 2-1, it is possible to provide not only mid-point clicks but also different click angles and multi-point clicks.

A second embodiment of this invention is shown in FIG.

That is, in this clickable variable resistor with bush locking mechanism, the click spring 3' is provided with a notch 'fR3'-a, and the concave portion 1'-2 of the drive piece 1' is provided with the click spring 3'.
A conical protrusion 1'-1 is provided within the sliding locus of the notch 3'-a, and the spring 6
A click feeling is obtained by rotating the operating shaft 4 while the drive piece 1' presses the click spring 3 while being supported by the mounting plate 2-1.

The rest is the same as the first embodiment. As described above, the click variable resistor with a bush locking mechanism of this invention has a click spring on the operating shaft, and the click spring and the opposing member are brought into elastic contact by the return urging force in the thrust direction by the bush lock mechanism. Since the contact surface is provided with a concave-convex engaging means for generating a click, the number of parts is small, the click mechanism can be easily assembled, and a click mechanism can be added, and the device can be further miniaturized.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the first embodiment of this invention, Fig. 2 is a side view thereof, Fig. 3 is a longitudinal sectional view of the locked state, Fig. 4 is a side view thereof, and Fig. 5 is a longitudinal sectional view of the first embodiment. FIG. 6 is an exploded perspective view of the main part of the second embodiment. A... Button lock mechanism, B... Resistor body, C... Click mechanism, 1...
・Drive piece (non-rotating opposing member), 2...Mounting plate (
non-rotating opposing member), 3...click spring, 6.
...Spring, 2-1...Groove (uneven engagement means), 3-1...Protrusion (uneven engagement means)
, 1'-1...Protrusion (uneven engagement step), 3'-a
Groove (concave/convex engagement means).

Claims (4)

[Scope of utility model registration request] (1) A rotary operating shaft that can be thrust operated by a bush locking mechanism, a click spring that is attached to this operating shaft and rotates together with the operating shaft, and a non-rotating shaft that elastically contacts the click spring due to the spring bias of the bush locking mechanism. A clickable variable resistor with a bush locking mechanism, comprising a facing member and a click generating uneven engagement means formed between the click spring and the non-rotating facing member. (2) The click variable resistor with a bush lock mechanism according to claim 1, wherein the click spring is oil-soluble and is housed in a recess of the drive piece of the bush lock mechanism. (3) The rotating opposing member is a resistor body, and the click generating uneven engagement means has a protrusion protruding from the click spring, and a groove is formed in the resistor body with which the protrusion engages. A clickable variable resistor with a bush locking mechanism as set forth in claim (1) or (2) of the utility model registration. (4) A utility model in which the non-rotating opposing member is a driving piece of the push lock mechanism, and the click generating uneven engagement means is formed by forming a groove on the click spring and forming a protrusion on the driving piece. A clickable variable resistor with a bush locking mechanism according to registered claims (1) or (2).