JPS6025846Y2 - Operation axis device - Google Patents

Description

[Detailed description of the invention] The present invention is an operation that allows two or more operating shafts to be coaxially arranged to operate two or more variable resistors, etc., and to be able to slide in the axial direction. Regarding shaft devices.

Conventional operating knobs of operating shafts of electronic components such as variable resistors usually protrude from the panel surface of the set.

However, in recent years, sets have been made smaller, and in order to solve the problem that when many rotary-operated variable resistors are used side by side, the distance between their operation knobs becomes narrower, making it difficult to operate them. , or if you want to flatten the surface of the front panel of the set to create a temporary new design, push the operation knobs of electronic components such as variable resistors until they are almost flat with the panel surface except when operating them. This method is increasingly being adopted.

A single-axis type electronic component that satisfies this purpose is known, as shown in FIG. 1, in which the operating shaft is moved in and out of the panel surface of the device.

That is, in this case, the operating shaft 1 is locked and held at an intermediate position 4 of the sliding movement by a locking mechanism 3 connected to the rear part of the variable resistor 2.

However, in the past, only single-axis types were available, and all types with two or more axes did not slide in the fine line direction, and were inconvenient in that they could not be used for the above-mentioned applications.

Therefore, the present invention aims to make it easier to operate the knobs of multiple operating axes when attempting to rotate the electronic components in equipment that uses electronic components with multiple functions, such as rotary-operable multi-axis multi-variable resistors. To provide an operating shaft device having a structure that allows the device to protrude from the panel surface of the device, and also allows the knob portion of the overall operating shaft to be pushed into a position almost flat with the panel surface of the device when not in operation. This is the purpose.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to drawings showing an embodiment of the present invention implemented in a rotary-operable multi-axis multi-variable resistor.

First, electronic components such as variable resistors 13 and 14 are rotatably held by a bearing 10 and rotated by two coaxially arranged operating shafts, that is, an outer operating shaft 11 and an inner operating shaft 12. Rotary bodies 15.16 are arranged axially slidably connected to the operating shaft 11.12, each rotary body 15.16 having a brush 1.
7 is attached, and the resistance element 1 is attached on the opposite surface thereof.
8 and rotates and slides on it.

A retaining ring 19 is attached to the tip of the outer operating shaft 11 to prevent the outer operating shaft 1 from coming off.

A retaining ring 20 forming a coupling step is attached near the tip of the outer operating shaft 11 of the inner operating shaft 12 with a slight gap between the outer operating shaft 11 and the inner operating shaft 12. It is made to slide along with the sliding movement in the axial direction.

Since the outer operating shaft 11 is sandwiched between the retaining ring 20 and the neck portion 21 of the inner operating shaft 12 with a slight gap, it is synchronized with the sliding operation of the inner operating shaft 12 in the axial direction. and slide.

Further, the inner operating shaft 11 is point-fitted and supported only by the supporting convex portion 11' on the inner diameter part of the outer operating shaft 12,
The other parts become narrow diameter parts and escape, and the rotating body 16 of the electronic component near the tip of the inner operating shaft 11
It is point-fitted and supported by the center hole 16'.

Therefore, even if some eccentricity or inclination occurs when the two sets of electronic components 13 and 14 are combined, the rotational operation and axial sliding of these two operating shafts can be performed smoothly.

Further, a locking mechanism 23 is provided connected to the other end 22 of the inner operating shaft 12 .

This locking mechanism 23 locks and holds the inner operating shaft 12 at an intermediate position in the axial direction.

Since the outer operating shaft 11 is synchronized with the sliding movement of the inner operating shaft 12, when the inner operating shaft 12 slides, the outer operating shaft 11 also slides in the same way, and the inner and outer operating shafts 11. 12
The two pieces will be held in lock at the same time.

Next, the configuration of the lock mechanism 23 will be explained.

The housing 24 is attached to a case 25 of the variable resistance mechanism storage section via an insulating plate 26, and a lock plate 27 is slidably mounted inside the housing 24.

A groove 22a is formed in the tip 22 of the operating shaft 12, and is fitted into a notch 27a provided on the lower side of the lock plate 27, so the operating shaft 12 can rotate within the notch 27a. Further, in response to the button operation of the operating shaft 12, the lock plate 27 slides within the housing 24 against the biasing force of the spring 28.

The upper surface 27b of this lock plate 27 is provided with a specially shaped uneven part as will be described in detail later, and this uneven part is provided on the tip of a lock pin 29 disposed above the lock plate 27 at a protruding part 29a. By engaging or disengaging the variable resistor, the variable resistor has a locking or unlocking function.

That is, the upper surface of the lock pin 29 has a rotation holding portion 29b.
This T-shaped protrusion is rotatably inserted and engaged into the through hole 30a of the cover plate 30 attached to the upper part of the housing 24, and the lock plate 27 slides directly below the lock pin 29, the protruding portion 29a of the lock pin 29 presses the upper surface 27b of the lock plate 27, and engages with or disengages from the uneven portion provided on the upper surface 27b of the lock plate 27. It is.

In order to enhance the pressing effect of the lock pin 29, a pressing plate spring 31 may be interposed between the lock pin 29 and the cover plate 30. Next, based on FIGS. 4 and 5 a to 5C, , the shape of the upper surface 27b of the lock plate 27 will be explained.

In FIG. 4, 27c is the side wall portion that projects upward, 27d, 27e and 27f are the second projecting V-shaped locking portions, triangular projections and trapezoidal projections, and 27g is the respective portion. The bottom part is one step lower than 27d to 27f, and the bottom part 27h is one step lower than the bottom part 27g.
27j is a sloped portion that smoothly connects the bottom portion 27h and the end of the v-shaped locking portion 27d; A guide side wall leading to the gap between the stop portions 27d, and a bottom portion 27g on the 27
A stepped portion 271 is formed at the boundary between the lower portion 27h and the lower portion 27h to prevent the lock pin 29 from moving backward.
This is an open end portion that leads a to the upper surface of the lock plate 27.

Note that the bottom surface portion 27g, the lower portion 27h, and the inclined portion 27i form a passage for the protruding portion 29a of the lock pin 29.

Further, the upper surface 27b of the lock plate 27 using FIGS.
To explain in detail the relationship between the unevenness in FIG.
Between H and J there is a gentle slope, there is a step at J, and between K and L a slope is formed again.

Furthermore, FIG. 5C shows a vertical cross-sectional view along M-N-0-P-Q in FIG. It can be seen that there is a slope between O and P.

The operation of the variable resistor having the above configuration will be explained.

First, as shown in FIG. 2, when the operating knob of the operating shaft 12 is pushed to the left with a finger to perform a push action, the tip 22 of the operating shaft 12 pushes the lock plate 27 to the left against the biasing force of the spring 28. move it.

Eventually, the upper surface 27b of the lock plate 27 comes into contact with the protrusion 29a of the lock pin 29.

That is, in FIG. 4, the protrusion 29 of the lock pin 29
This means that a has moved from a position A away from the lock plate 27 to a position B at the open end 271.

Further, when the operating shaft 12 is pushed to move the lock plate 27 to the left, the protrusion 29a of the lock pin 29 is guided onto the passage 27g while being smoothly guided by the guide side wall 27j, and eventually reaches the side wall 27c. Ending (position C)
, along this side wall portion 27C to reach the gap (position D) between the triangular convex portion 27e and the trapezoidal convex portion 27f.

At this point, the sliding movement of the operating shaft 12 is stopped, and when you release your finger from the operating knob at this point, the locking plate 27 attempts to return to the right side by the biasing force of the spring 28, and the gap between the V-shaped locking portion 27d (Position E), and in this state it is stopped by the V-shaped locking portion 27d.

Through the above process, the operating shaft 12 enters the inside of the variable resistor and is locked in an apparently shortened state.

In this state, even if the operating shaft 12 is rotated, the variable resistor can operate normally.

Next, in order to project the operating shaft 12 outward, the operating knob 12a may be pushed again.

Then, in FIG. 4, the protrusion 2 of the lock pin 29
9a falls from the bottom part 29g (position E) to the lower part 27h (position F) by the stepped part 27k, and when you release your finger from the operating knob in this state, the lock plate 27 starts to restore itself by the urging force of the spring 28. It passes through the inclined portion 27i and returns to the state before operation (position A).

In the above embodiment, the lock pin 29 is made of an elastic molding material, so if an abnormal tensile force is applied in the locked state, the lock pin 29 will bend and the lock will be released, thereby preventing damage. .

In this way, when the bushing operation is repeated, the above operation is repeated, and the bushing is locked and unlocked repeatedly.

When the protrusion 29a of the lock pin 29 separates from the lock plate 27, the position of the protrusion 29a becomes arbitrary.

Even if the initial position of the protrusion 29a is slightly shifted when the next button operation is performed, the protrusion 29a will not malfunction.
It is important that the opening end 271 is smoothly introduced into the bottom surface 27g of the lock plate 27, and that it is reliably engaged with the gap (position E) of the V-shaped locking portion 27d. In order to do this, the guide side wall 27j is effectively utilized as a guide portion for the lock pin 29.

Furthermore, the bottom surface portion 27g and the slope portion 27i, which serve as a passage for the protruding portion 29a, are formed by sloped surfaces to make the movement of the operating shaft 12 feel smooth, and a stepped portion 27k is formed at the boundary between the bottom surface portion 27g and the lower portion 27h. This prevents malfunction due to backward movement of the lock pin 29.

Figures 6a and 6b are plan views of a locking plate of a variable resistor in another embodiment of the present invention and H'-I of the locking plate.
It is a sectional view at '-J'- and '-L'.

In this embodiment, step portions are provided at each of I', J', and K', which has the effect of reliably preventing the protrusion of the lock pin from moving backwards.

By such sliding of the inner operating shaft 12, the outer operating shaft 11, which is sandwiched and connected between the stop pin 20 of the stepped portion and the neck portion 21, also slides.

In addition, in the above embodiment, two operating shafts 11 and 12 are used.
Although the case has been described in which three or more wires are used, it goes without saying that three or more wires may be arranged coaxially.

As described above, according to the present invention, in an electronic component in which two or more operating shafts are arranged coaxially, the two or more operating shafts can be slid smoothly in the axial direction at once, and each operating shaft can be moved smoothly. It is possible to obtain a convenient device that allows rotation operations to be performed smoothly.

[Brief explanation of the drawing]

Fig. 1 is a front view of a variable resistor using a conventional operating shaft device, Fig. 2 is a sectional front view of a variable resistor using an operating shaft device according to an embodiment of the present invention, and Fig. 3 is its lock. FIG. 4 is a plan view of a lock plate sliding inside the lock mechanism, FIGS. 5 a to C are a plan view and a vertical sectional view of the lock plate, and FIGS. 6 a and b are exploded perspective views of the mechanism. FIG. 7 is a plan view and a longitudinal cross-sectional view of another lock plate. 11...Outer operating shaft, 12...Inner operating shaft, 13, 14... Variable resistor, 15.
16...Rotating body, 17...Brush, 18
...Resistance element, 19.20 ... Retaining ring, 21 ... Neck, 22 ... Other end,
23...Lock mechanism, 27...Lock plate, 29---Lock pin.

Claims (1)

[Scope of utility model registration request] At least two operating shafts that can slide in the axial direction are arranged such that the inner shaft is connected to the inner diameter of the outer shaft and the center hole of the rotating body of the electronic component that is rotatably operated by the operating shaft so that each of the operating shafts can be rotated independently. The two steps of the inner shaft are arranged so as to sandwich the outer shaft with a slight gap, and the electronic components that are operated by the rotation of each of the operating shafts are attached to the operating shafts respectively. At the same time, one of the operating shafts is provided with a locking mechanism for regulating the sliding position in the axial direction, and another operating shaft is coupled to the operating shaft so as to slide in the axial direction together with the one operating shaft. Control axis device for electronic components.