JPH0720882Y2 - Operation knob - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to an operation knob that is preferably implemented to prevent a level change such as a volume knob or a balance adjustment knob for setting a recording level due to an inadvertent touch of a finger. ,
More specifically, the present invention relates to an operation knob that projects from the panel surface during operation and has a small amount of projection from the panel surface when not in operation, or is housed in the panel.

Prior Art FIG. 5 is a perspective view of a typical prior art operating knob 1. In this operation knob 1, as shown in FIG. 5 (1), a reticle 3 is formed on the outer peripheral surface of a cylindrical head portion 2, and the outer peripheral surface is grasped by fingers or the like. Level adjustment is performed by angularly displacing the head 2. An operating shaft 4 is fixed to the head 2, and the operating shaft 4 is angularly displaced by the angular displacement of the head 2 as described above, and the resistance value of the variable resistance portion 5 is changed. .

A storage hole 7 for storing the head 2 is formed in the panel 6 on which the operation knob 1 is arranged. The operation shaft 4 is also inserted into the variable resistance portion 5 and connected to the expansion and contraction mechanism portion 8. The extension / contraction mechanism 8 is realized by a locking mechanism using, for example, a heart-shaped cam, and by pressing the head 2 of the operation knob 1, the operation shaft 4 is retracted, so that
As shown in FIG. 2B, the head 2 is housed and held in the housing hole 7.

In this manner, with the head 2 stored in the storage hole 7,
It is difficult to grip the head 2, and it is possible to prevent an erroneous operation caused by an unintended level adjustment of the operator, for example, a careless contact of the finger with the head 2. When the head portion 2 is pressed again, the expansion and contraction mechanism portion 8 extends and holds the operation shaft 4 in the direction opposite to the pressing direction, and thus, as shown in FIG. The light comes out of the housing hole 7 and projects from the surface of the panel 6, and the level can be adjusted as described above.

Problems to be Solved by the Invention In the above-described conventional technology, when performing level adjustment,
The head 2 has to protrude from the surface of the panel 6,
Therefore, it is not possible to deal with quick operation, resulting in poor operability and convenience.

An object of the present invention is to provide an operation knob with improved operability and convenience.

Means for Solving the Problems The present invention provides a head having a pressing surface to be pressed with fingers, an operation shaft extending along the pressing direction from the head, and the operation shaft provided in association with the operation shaft. A holding mechanism that holds the operating shaft in each of the extended state and the retracted state; and a signal generating unit that is provided in association with the operating shaft and derives a signal corresponding to an angular displacement operation of the operating shaft, The operation knob is characterized in that the pressing surface of the head is processed to increase frictional force.

Operation According to the present invention, when the pressing surface of the head is pressed by the fingers, the pressing force is transmitted to the holding mechanism via the operation shaft extending from the head along the pressing direction. The holding mechanism holds the operation shaft in the extended state and the retracted state in response to the pressing operation. A signal generating means is also provided in association with the operating shaft, and a signal corresponding to the angular displacement operation of the operating shaft is derived from this signal generating means. The pressing surface of the head is processed to increase the frictional force, for example, by forming irregularities or roughening the surface.

Therefore, when the operating shaft is in the extended state, the outer peripheral surface of the head can be gripped to adjust the level, and even when the operating shaft is in the retracted state, the fingers are pressed against the pressing surface of the head. The head portion can be angularly displaced by applying frictional force. Thus, even when the operation shaft is in the retracted state, the level adjustment can be performed as in the extended state.
Therefore, it is no longer necessary to project the head each time the level is adjusted as described in the section of the prior art, and even if the level shifts when retracting, it is possible to easily adjust, and quick and precise operation is possible. Therefore, operability and convenience can be improved.

Embodiment FIG. 1 is an exploded perspective view of an operating knob 11 according to an embodiment of the present invention. The operation knob 11 includes a head portion 12 formed in a cylindrical shape, an operation shaft 14 having one end fixed to the head portion 12 and extending in the pressing operation direction side indicated by an arrow 13, and the operation shaft 14. The variable resistor portion 15 which is a shaft 14 insertion signal generating means,
The other end of the operation shaft 14 is connected to the operation shaft 14, and the operation shaft 14 is configured to include an expansion / contraction mechanism 16 that holds the operation shaft 14 in each of the extended state and the retracted state.

A protrusion 22 extending in the radial direction is formed on the pressing surface 21 of the head 12, and by this protrusion 22, when a finger is pressed against the pressing surface 21 and the head 12 is angularly displaced, Pressing surface
The frictional force between 21 and the fingers is increased. On the outer peripheral surface of the head portion 12, a loret 17 is formed. Also this head 12
On the surface opposite to the pressing surface 21 in
One end of 14 is fixed, and a flat engagement surface 23 is formed on the other end of the operating shaft 14.

The variable resistance portion 15 includes a disc-shaped casing 31, a cap-shaped casing 32, and a rotating member 33. An electrically insulating substrate is provided on the surface of the casing 31 on the rotating member 33 side.
34 is mounted on the board 34, and the resistor 35
And the conductor 36 are formed concentrically. The conductor 36 is connected to the terminal 37, and both ends of the resistor 35 are connected to the terminals 38 and 39, respectively.

The rotating member 33 is formed of an electrically insulating material into a cylindrical shape, and an inner peripheral surface 41 thereof has a flat engaging surface 42 corresponding to the engaging surface 23 of the operating shaft 14. To be done. Therefore, the rotating member 33 is displaceable in the axial direction of the operating shaft 14, and the rotating member 33 is also angularly displaced corresponding to the angular displacement of the operating shaft 14. A brush that makes sliding contact with the resistor 35 and the conductor 36 is provided on the surface of the rotating member 33 on the substrate 34 side.
43 and 44 are attached, and the brushes 43 and 44 are electrically connected. The rotating member 33 and the substrate 34 are the casings 31, 3
The variable resistance portion 15 is housed in the inside of the housing 2, and thus the variable resistance portion 15 is configured.

The other end of the operation shaft 14 inserted through the variable resistance unit 15 is connected to the expansion / contraction mechanism unit 16. A locking mechanism using, for example, a heart-shaped cam or the like is provided in the expansion / contraction mechanism section 16. The extension mechanism 16 is attached at a fixed position, and when the head 12 is pushed in the direction of the arrow 13 in this way, the operation shaft is
When the head 12 is pressed again, the operation shaft 14 is held in a stretched state.

The operation knob 11 configured as described above is attached to the panel 18 of the electronic device, and the terminals 37 to 39 of the variable resistance section 15 are connected to a wiring board or the like. A storage hole 19 is formed in the panel 18 so as to correspond to the head portion 12, and when the operation shaft 14 is extended, a second hole is formed.
As shown in FIG. 1A, the head 12 protrudes from the surface of the panel 18, and the operator can angularly displace the head 12 by gripping the low-lett 17 portion of the head 12. In addition, the operating shaft 14 is retracted, and as shown in FIG.
In the state where 12 is accommodated in the accommodation hole 19, the pressing surface 21 of the head 12 is angularly displaced while being pressed by the operator's fingers or the like.

As described above, in the operation knob 11 according to the present invention, the pressing surface 21 of the head 12 is provided with the projection 22 for increasing the frictional force.
The level can be adjusted even when the head 12 is stored in the storage hole 19, and it is not necessary to project the head 12 from the panel 18 every time the adjustment is performed, and the level is shifted when the head is retracted. Can be easily adjusted, and quick and precise operation can be performed. In addition, the level can be adjusted whether the head 12 is housed in the housing hole 19 or the state where the head 12 is projected on the panel 18, and thus the level can be adjusted significantly. Head when doing
Only when it is necessary to project 12 is it necessary to perform such a projecting operation, whereby operability and convenience can be improved.

FIG. 3 is a perspective view of the head portion 52 of the operating knob according to another embodiment of the present invention. In this head portion 52, the pressing surface 51 is roughened by a so-called sand brush or the like.

FIG. 4 is a perspective view of the head portion 62 of the operating knob according to still another embodiment of the present invention. In the head portion 62, a depression 60 for engaging a fingertip or the like is formed on the pressing surface 61. As a result, even when the head portion 62 is housed in the housing hole 19, a large level change can be performed quickly.

In the above-described embodiment, the single variable resistance portion 15 is adjusted and controlled in a state where the operation shaft 14 of the operation knob 11 is extended and a state where the operation shaft 14 is retracted. In the above, each variable resistance unit may be adjusted and controlled.

Effects of the Invention As described above, according to the present invention, the pressing surface of the head of the operation knob, which is pressed by fingers, is processed to increase the frictional force such as unevenness or roughening. Since the operation shaft is extended, it is possible to adjust the level by grasping the outer peripheral surface of the head when the operation shaft is in the extended state. By pressing, the head can be angularly displaced by utilizing the frictional force. Therefore, it is not necessary to project the head each time the level is adjusted, and even if the level shifts when retracting, the level can be adjusted easily, and quick and precise operation is possible. It is possible to improve the property. When the operating shaft is in the retracted state, contact with the head does not occur unless otherwise specified.
It is possible to sufficiently prevent an erroneous operation that is not intended by the operator.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an operating knob 11 according to an embodiment of the present invention, FIG. 2 is a perspective view showing an extended and retracted state of the operating knob 11, and FIG. 3 is an operating knob of another embodiment of the present invention. FIG. 4 is a perspective view of a head 52 of FIG. 4, FIG. 4 is a perspective view of a head 62 of an operating knob according to still another embodiment of the present invention, and FIG. 5 is a perspective view showing the extended and retracted states of the operating knob 1 of the prior art. Is. 11 …… Operation knob, 12,52,62 …… Head, 14 …… Operation axis,
15 ... Variable resistance part, 16 ... Expansion mechanism part, 17 ... Rollet, 18 ... Panel, 19 ... Storing hole, 21,51,61 ... Pressing surface, 22 ... Protrusion, 60 ... Recess

Claims (1)

[Scope of utility model registration request] 1. A head having a pressing surface to be pressed with fingers, an operation shaft extending from the head along a pressing direction, and an operation shaft provided in association with the operation shaft and in an extended state. A pressing mechanism for the head, which includes a holding mechanism that holds the contracted state and a signal generating unit that is provided in association with the operation shaft and that derives a signal in response to an angular displacement operation of the operation shaft. The operation knob is characterized by being processed to increase frictional force.