JPH0726743Y2 - Locking device for operating knob - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention controls the rotating operation of an adjusting knob provided on an operation panel of an electric device or an electronic device, and locks it at an appropriate position with one touch. It is related to the device.

[Conventional technology]

Conventionally, radios for general household use, televisions, factories, parks, station platforms, and other loudspeaker amplifiers, other radars,
Operation knobs for rotation adjustment are used in electronic calculators, etc., but sometimes the operation knobs could easily turn due to the operator's carelessness or the surrounding environment.

That is, for example, when the coordinator is a technician and the operator (user) of the apparatus is a general consumer such as an audio device or a color television, the operator frequently changes. However, these devices are usually adjusted to the best condition when in use, but often the operator makes unnecessary adjustments, inadvertent contact, or vibration, etc. I had to readjust because there was a gap.

At this time, the proper position may be lost due to excessive adjustment operations, or the volume may be disturbed by loud sounds, which not only complicates the handling operation but also the time loss. Therefore, I was particularly worried about use in an emergency.

In order to solve these problems, the applicant of the present invention
We have already devised a cover mounting structure for the operating knob as shown in Japanese Patent No. 61-37050. That is, in the device described in this publication, an opening having a diameter larger than the diameter of the knob is provided around the knob provided on the operation panel, and an elastic leg having an outward hook-shaped portion at the tip is provided at the opening. The hook-shaped part of the cup-shaped knob cover thus obtained is fitted, and after the operation knob is adjusted to an appropriate position, the knob cover is detachably attached to the operation panel.

[Problems to be solved by the device]

In the structure described in Japanese Utility Model Publication No. 61-37050, when the knob cover comes off due to carelessness of the user,
Since the operation knob is not locked, there was a problem that it could easily turn.

The present invention has been made in view of the above points, and once the position of the operation knob is determined to be in the most appropriate state, the adjuster can surely lock the position in a fixed state with one touch, and it is necessary. Accordingly, it is an object of the present invention to provide a lock device for an operation knob that can also be unlocked with a single touch to change the adjustment position.

[Means for Solving the Problems]

In order to achieve the above object, the operating knob locking device according to the present invention will be described with reference to FIGS. 1 to 5. The operating shaft 14 of the variable resistor 12 mounted on the panel chassis 10 will be described.
And a shaft through hole 16 having the same sectional shape as that of the operating shaft 14, into which the operating shaft 14 is fitted, is provided at a substantially central portion, and guide grooves 18 having a substantially U-shaped cross section are provided on both sides. A guide member 22 having protrusions 20 on the inner surface of 18 and two recesses 24, which slide in the guide groove 18 and fit with the protrusions 20, are provided on each side, and the shaft insertion hole 16 is provided at the substantially central portion. A slide member 32 having a large elongated hole 26, an engagement protrusion 28 at one end, and a pressing piece 30 at the other end, and a slide member 32 arranged in the same plane as the slide member 32.
A panel 38 having a circular opening 36 having an internal tooth portion 34 with which the 28 engages, and an operation knob 40 for attaching to the tip of the operation shaft 14 penetrating the shaft through hole 16 of the guide member 22 are included. The amount of sliding of the slide member 32 is restricted by the projection 20 and the depression 24 at two points, and the distance between these two points is determined by the engaging protrusion 28.
And the distance between the protrusion 28 and the internal tooth-like portion 34 with which the protrusion 28 engages.

In addition, as described above, one projection 20 is provided on the guide member 22,
Instead of providing the two recesses 24 in the slide member 32, as shown in FIG. 7, the guide member 22 may be provided with two recesses 46 and the slide member 32 may be provided with one protrusion 48.

[Action]

After the operation knob 40 is rotated to adjust the operation shaft 14 to the most appropriate position, the pressing piece 30 is pressed to insert and engage the engagement protrusion 28 with the internal tooth portion 34. At this time, the protrusion 20 on the inner surface of the guide groove 18 is fitted into the recess 24 near the center of the slide member 32, so that the end of the elongated hole 26 of the slide member 32 abuts the operation shaft 14 and the operation shaft 14 is locked securely.

When readjustment becomes necessary, the pressing piece 30 is pulled to release the lock.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the shapes of the components described in this embodiment, their relative arrangements, etc., are not intended to limit the scope of the present invention to only those unless otherwise specified, and are merely illustrative examples. Only.

FIG. 1 is a sectional explanatory view showing an embodiment of a lock device for an operating knob of the present invention, FIG. 2 is a perspective view of the main part thereof, FIG. 3 is a plan view thereof, and FIG. 4 is that of FIG. It is a perspective view which combined the operation knob with.

Reference numeral 10 denotes a panel chassis of an electric device or an electronic device, and a variable resistor 12 and its operation shaft 14 are attached to the panel chassis 10. The operation shaft 14 is, for example, a D-cut type having a D-shaped cross section as shown in FIG. 15 is a plane part.

Reference numeral 22 is a guide member, which is provided with a shaft through hole 16 having the same shape as the cross-sectional shape of the operating shaft 14 at a substantially central portion thereof, and guide grooves 18 having a substantially U-shaped cross section on both sides, and inner surfaces of these guide grooves 18 are provided. Each of them has a protrusion 20.

Reference numeral 32 denotes a slide member that slides in the guide groove 18. The slide member 32 has two recesses 24 on both sides to which the projections 20 fit, and a long hole 26 having a larger major axis and a smaller minor diameter than the shaft through hole 16 is formed at a substantially central portion. Prepare,
A mountain-shaped engaging protrusion 28 is provided at one end, and a pressing piece 30 is provided at the other end.

Further, a panel 38 is arranged in the same plane as the slide member 32, and the panel 38 has a circular opening 36 having an internal tooth portion 34 with which the protrusion 28 engages. Then, the guide member 22
Operation knob 40 at the tip of the operation shaft 14 that penetrates the shaft through hole 16
Is installed.

The slide member 32 slides in the direction vertical to the shaft through hole 16 of the guide member 22 and also in the plane portion 15 of the operation shaft 14 in the vertical direction. The amount of sliding is restricted by the protrusion 20 inside the guide member 22 and the two recesses 24 on both side surfaces of the slide member 32. The distance between the two points should be equal to the distance between the engaging protrusion 28 and the internal tooth portion 34 provided around the circular opening 36 of the panel 38, into which the protrusion 28 fits. Adjust it.

When the D-cut type is used as the operation shaft 14, the end of the slide member 32 farther from the protrusion 28 of the long hole 26 is formed in the linear portion 27, and the protrusion 28 has an internal tooth shape. Part 34
When it is fitted to the operation shaft 14 and the linear portion 27 of the long hole 26,
So that it contacts the flat surface portion 15.

With the above configuration, after the operation knob 40 is installed at an arbitrary position, the pressing piece 30 is pressed as it is, thereby moving the slide member 32 to the position shown by the chain double-dashed line in FIG. 3 and locking the operation shaft 14. can do. To release the lock, it is sufficient to pull the pressing piece 30.

FIG. 6 shows an adapter 44 to be inserted into the round hole 42 of the conventional panel 38. The adapter 44 has a circular opening 36 with internal teeth 34. If such an attachment is manufactured, it can be applied to a panel having a conventional round hole 42.

FIG. 7 shows another embodiment of the locking device for the operating knob of the present invention. In this example, the guide member 22 has two recesses 46.
And one projection 48 is provided on the slide member 32. Other configurations and operations are similar to those of the embodiment shown in FIGS.

In the above embodiments, the case of the D-cut type operating shaft has been described, but it is also possible to use a serration type (vertical groove type) operating shaft. Also, as the variable resistance,
It may be of a type in which the operation shaft 14 is rotationally adjusted within a range of an angle of less than 360 degrees, or may be of a rotary type in which it is rotated only in one direction.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

(1) Since the guide member and the slide member can reliably lock, the setting of the operating axis is extremely unlikely to be inadvertent due to carelessness or the like.

(2) The structure is simple, and the lock operation and the lock release operation can be performed by one touch with one finger of one hand.

(3) If an attachment in the shape of an internal gear is created, it can be applied to a conventional panel having a round hole and has high versatility.

(4) It can be applied to almost all variable resistances from variable resistances having a fixed movable range to variable resistances of the rotary type, and is extremely versatile.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing an embodiment of a lock device for an operating knob of the present invention, FIG. 2 is a perspective view of a main part in FIG. 1, FIG. 3 is a plan view of the same, and FIG. FIG. 5 is a perspective view in which the operation knob is combined with FIG. 5, FIG. 5 is a cross-sectional view showing an example of an operation shaft, FIG. 6 is a perspective explanatory view showing an example of an adapter, and FIG. 7 is a locking device of the operation knob of the present invention. It is a top view of the important section showing other examples of. 10 …… Panel chassis, 12 …… Variable resistance, 14 …… Operation axis, 15 …… Flat part, 16 …… Shaft through hole, 18 …… Guide groove,
20 ... Protrusion, 22 ... Guide member, 24 ... Recess, 26 ... Long hole, 27 ... Straight portion, 28 ... Engaging projection portion, 30 ... Pressing piece, 32 ... Slide member, 34 …… Internal teeth, 36 …… Circular opening, 38 …… Panel, 40 …… Operating knob, 42 …… Round hole,
44 …… Adapter, 46 …… Dimple, 48 …… Protrusion

Claims (2)

[Scope of utility model registration request] 1. An operating shaft (14) of a variable resistor (12) mounted on a panel chassis (10) and a sectional shape of the operating shaft (14) with which the operating shaft (14) is fitted. A guide member (provided with a shaft through hole (16) at a substantially central portion, guide grooves (18) having a substantially U-shaped cross section on both sides, and projections (20) provided on the inner surfaces of these guide grooves (18) ( 22) and two depressions (24) on both sides that slide in the guide groove (18) and fit the projections (20), and have a long hole larger than the shaft through hole (16) in the approximate center. A slide member (32) having (26), an engaging protrusion (28) at one end, and a pressing piece (30) at the other end, and the slide member (32) arranged in the same plane as the slide member (32). A panel (38) having a circular opening (36) having an internal tooth-like portion (34) with which the fitting projection (28) engages, and a shaft through hole (16) of the guide member (22). The operation knob (40) for mounting on the tip of the operation shaft (14) is included, and the slide amount of the slide member (32) is restricted at two points by the protrusion (20) and the depression (24). The distance between the points is
The operating knob locking device is characterized in that it is configured to have a distance equal to the distance between the engaging projection (28) and the internal toothed portion (34) with which the projection (28) engages. . 2. A projection (20) on the guide member (22),
Instead of providing the slide member (32) with two recesses (24), the guide member (22) is provided with two recesses (46) and the slide member (32) is provided with one protrusion (48). The locking device for the operating knob according to claim 1,