JPH0726740Y2 - Locking device for operating knob - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention controls the rotary 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. The present invention relates to a highly versatile 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 the fixed state and, if necessary, It is an object of the present invention to provide a highly versatile locking device for operating knobs that can also be unlocked to change the adjustment position.

[Means for Solving the Problems]

In order to achieve the above object, the lock device for the operating knob according to claim 1 will be described with reference to FIGS. 1 to 3.
Operation axis of variable resistor 12 mounted on panel chassis 10
14, a first gear 18 having a shaft through hole 16 having the same sectional shape as that of the operation shaft 14 into which the operation shaft 14 is fitted, and a through hole 20 meshing with the first gear 18. The second gear 22, the locking screw 24 that passes through the through hole 20 of the second gear 22, and the female screw portion 26 with which the locking screw 24 is screwed are provided at one end, and the protrusion 28 is provided at the other end. The fixing member 30, a holding member 34 having one end vertically connected to the fixing member 30 and having an opening 32 through which the operation shaft 14 is inserted at the other end, and a protrusion 28 at the other end of the fixing member 30 are inserted. A small hole 36 provided in the panel chassis 10, an operation knob 38 to be attached to the tip of the operation shaft 14 penetrating the shaft through hole 16 of the first gear 18, a first gear 18 and a first gear 18 and It is arranged between the gear 22 of No. 2 and the operating knob 38, the operating shaft 14 penetrates, and the locking screw 24
And a panel 42 having a common opening 40 for operating the.

The lock device for the operating knob according to claim 2 will be described in detail with reference to FIG.
Instead of providing a common opening 40 through which the operating shaft 14 penetrates and operating the locking screw 24 in 42, the panel 42 is provided with
An opening 40a through which the operation shaft 14 penetrates and a small opening 41a for operating the locking screw 24a are separately provided.

[Action]

The operating shaft 14, the first gear 18, the second gear 22 shown in FIG.
After assembling the lock screw 24, the fixing member 30, the holding member 34, etc. as shown in FIG. 2, the operation knob 38 is attached to the tip of the operation shaft 14 and adjusted to the most appropriate position. At this proper position, the locking screw 24 is tightened to lock.

When readjustment is necessary, loosen the lock screw 24 to release the lock, and then rotate the operation knob 38 to make adjustment. In this case, when the small opening 41 is covered by the operation knob 38, the operation knob 38 is also attached and detached.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, unless otherwise specified, the materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention to them, but are merely an explanation. It's just an example.

Embodiment 1 FIG. 1 is an exploded perspective view of a lock device for an operating knob in Embodiment 1, FIG. 2 is an assembled sectional view of the main part, and FIG.
It is an expanded sectional view around a lock screw in the drawing.

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 variable resistor 12 may be of a type in which the operating shaft 14 is rotated and adjusted within a range of an angle of less than 360 °, or may be of a rotary type that rotates only in one direction.

Reference numeral 18 is a first gear made of synthetic resin (for example, Duracon) or metal, and has a shaft through hole having the same cross-sectional shape as the operation shaft 14.
Equipped with 16. This first gear 18 has a second gear 22
Mesh with each other. This second gear 22 is also made of synthetic resin (for example,
It is made of Duracon or metal and has a through hole 20 having a size into which one end of the fixing member 30 can be inserted.

Reference numeral 24 denotes a lock screw, which is screwed into the female screw portion 26 at one end of the fixing member 30 through the through hole 20 of the second gear 22. Fixing member 30
Is made of synthetic resin or metal and has a protrusion 28 at the other end. Reference numeral 31 is a stopper for contacting the second gear 22.

Reference numeral 34 denotes a holding member, one end of which is vertically connected to the fixed member 30, and the other end of which has an opening 32 through which the operation shaft 14 is inserted. The holding member 34 and the fixing member 30 may be integrally formed, or the protrusion 28 of the fixing member 30 may be preliminarily provided with a screw, and the protrusion 28 may be inserted and screwed into the boss at the lower end of the holding member 34. May be.

By the fixing member 30 and the holding member 34, the first gear 18 and the second gear 18
Meshes well with the gear 22 of.

Then, after meshing the both gears 18, 22, by inserting the protrusion 28 of the fixing member 26 into the small hole 36 of the panel chassis 10, by tightening the locking screw 24 into the female screw portion 26 of the fixing member 30, The operating shaft 14 can be locked by fixing the first gear 18.

A panel 42 is arranged between the first gear 18 and the second gear 22 and the operation knob 38. The panel 42 is for penetrating the operation shaft 14 and for operating the locking screw 24. It has a common opening 40. Reference numeral 41 is a small opening for operating the locking screw 24.

FIG. 4 shows another example around the lock screw. That is, the tapered opening 44 is provided at one end of the fixing member 30a, and the locking screw 24a is tightened in the tapered opening 44.

Also, instead of the fixing member 30, a small screw as shown in FIG.
The fixing member 30b including the 46 and the nut portion 48 may be used. The combination state with the locking screw 24 in this case is as shown in FIG.

Although the D-cut type operating shaft 14 is shown in FIG. 1, it may be a serration type (vertical groove type) operating shaft.

Embodiment 2 In this embodiment, as shown in FIG. 7, the panel 42 is provided with an opening 40a through which the operating shaft 14 penetrates and a small opening 41a for operating the locking screw 24a separately. . 50 is a screw operation knob for locking.

In this example, unlike the first embodiment, it is not necessary to remove the operation knob 38 when operating the locking screw, and the lock or unlock can be performed with one touch while the operation knob 38 is attached.

Other configurations and operations are similar to those of the first embodiment.

[Effect of device]

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

(1) Since the lock can be surely locked by the lock screw, the possibility that the setting of the operation axis is inadvertently changed is extremely small.

(2) If the lock is unnecessary, it can be easily released.

(3) It can be applied to almost any variable resistor from a variable resistor having a fixed movable range to a rotary type variable resistor, and is extremely versatile.

(4) In the case of claim 2, locking and unlocking can be performed with one touch.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a locking device for an operating knob of the present invention, FIG. 2 is an assembled sectional view of an essential part in FIG. 1, and FIG. 3 is a view around a locking screw in FIG. FIG. 4 is an enlarged sectional view, FIG. 4 is a sectional view showing another example around the locking screw, FIG. 5 is a perspective view showing another example of the fixing member in FIG. 1, and FIG. 6 is a fixing shown in FIG. 7 is an exploded perspective view showing another embodiment of the locking device for the operating knob according to the present invention. 10 …… Panel chassis, 12 …… Variable resistance, 14 …… Operating shaft, 16 …… Shaft through hole, 18 …… First gear, 20 …… Through hole,
22 …… Second gear, 24, 24a …… Lock screw, 26 ……
Female thread part, 28 ... Protrusion, 30, 30a, 30b ... Fixing member, 31
...... Stopper, 32 …… Opening, 34 …… Holding member, 36 …… Small hole, 38 …… Control knob, 40,40a …… Opening, 41,41a ……
Small opening, 42 …… Panel, 44 …… Tapered opening, 46 …… Small screw, 48 …… Nut part, 50 …… Lock screw operating knob

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. First gear (18) having a shaft through hole (16)
And a second gear (22) having a through hole (20) that meshes with the first gear (18), and a locking screw (through which the through hole (20) of the second gear (22) is inserted. 24) and a fixing member (30) having a female screw portion (26) with which the locking screw (24) is screwed, at one end, and a protrusion (28) at the other end.
A holding member (34) having one end vertically connected to the fixing member (30) and an opening (32) through which the operation shaft (14) is inserted, and the other end of the fixing member (30). For inserting the protrusion (28) of
A small knob (36) provided in the panel chassis (10) and an operation knob (38) for attaching to the tip of the operation shaft (14) penetrating the shaft passage hole (16) of the first gear (18). And the first gear (18) and the second gear (22) and the operating knob (38), the operating shaft (14) penetrates, and the locking screw (24) is operated. And a panel (42) having a common opening (40) for operating the operating knob locking device. 2. An operating shaft (14) penetrates the panel (42),
Moreover, instead of providing the common opening (40) for operating the locking screw (24), the operation shaft (14) is provided on the panel (42).
2. The lock device for an operating knob according to claim 1, wherein an opening (40a) through which the opening penetrates and a small opening (41a) for operating the locking screw (24a) are separately provided.