JPH10320064A - Operation knob equipped with lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent an operation mistake by forming a lock mechanism between an operation knob and a body chassis and simultaneously fixing the movement in the direction of turning with the knob thrust. SOLUTION: Relating to an operation knob 10 which is fixed at a position that is different from a normal state when it is thrust and returns to the position in the normal state when the knob 10 is thrust once more, a lock mechanism is formed between the rear plane of the knob 10 and a body chassis 30, the knob 10 is fixed, and also, the movement in the direction of turning is fixed when the knob 10 is thrust. The lock mechanism has at least one projection 4p on the rear plane of the knob 10, and holes 42 for locking into which the projection 40 is interfitted are provided on the chassis 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation knob provided with a lock mechanism which is fixed in a pushed state and at the same time is fixed in a rotational movement.

[0002]

2. Description of the Related Art Some rotary potentiometers used in various electric appliances are provided with an erroneous operation preventing function so that a setting is not accidentally changed during use. In simple ones,
In addition to those that are used frequently, some have a cover attached, and when used, the cover is opened for operation. However, in this case, the cover may get in the way when used,
Depending on the frequency of use (when the frequency of use is high), opening and closing the cover was troublesome in some cases. In addition, in operation, the operation knob protrudes from the panel surface and can be operated freely. However, when the knob is pushed in, it is fixed at the same position as the panel surface, and since it does not protrude, erroneous operation can be prevented. With this structure, when the knob is pushed again during use, the knob returns to the original position, and can be used with the same feeling as the other knobs.

[0003]

However, in this type of knob, although the surface of the head of the knob is fixed at the same position as the panel surface, the rotation of the knob itself is not fixed. When a hand or finger touches the panel surface, the knob may be accidentally touched and the knob may move. In particular, in the case of a large knob, such a problem is likely to occur.

[0004] The present invention has been made in view of the above points,
An object of the present invention is to form a lock mechanism between an operation knob and a main body chassis, and to fix a movement in a rotational direction at the same time when the knob is pushed in, thereby securely preventing an erroneous operation. An operation knob provided with:

[0005]

To achieve the above object, an operating knob provided with a lock mechanism according to the present invention is fixed at a position different from a normal state when the operating knob is pushed in, and the operating knob is pushed again. When the operation knob is configured to return to the normal position, a lock mechanism is configured between the back of the operation knob and the main unit chassis, and the operation knob is fixed while the operation knob is pushed in, and the rotation direction is Is also configured to be fixed.

In the above-mentioned operation knob, it is preferable that the position different from the normal state is configured so that the panel surface and the head surface of the operation knob are substantially at the same position. However, the operation knob is substantially the same as the panel surface. It is also possible to set it in a state where it is not fixed at the position (it protrudes from the panel surface even when it is pushed in). Further, the lock mechanism has a structure in which at least one (preferably two or more) protrusions are provided on the back surface of the operation knob, and a lock hole or a concave portion in which the protrusions are fitted is provided in the main body chassis. Be composed. On the contrary, the locking mechanism has at least one projection (preferably two or more) on the main body chassis, and has a locking hole or a concave portion on the back surface of the operation knob where the projection is fitted. It is configured to be a structure. Further, the lock mechanism may be configured to have an elastic member having a large frictional resistance on the back surface of the operation knob or on a portion of the main body chassis where the operation knob comes into contact. In this case, at least one projection may be provided on a portion of the main body chassis where the operation knob comes into contact with or on the back surface of the operation knob, but a configuration in which no projection is provided may be employed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments and can be implemented with appropriate modifications. 1 to 4 show an operation knob provided with a lock mechanism according to a first embodiment of the present invention. An operation knob 10 is provided with a flange 14 at the tip of a hollow shaft 12 of the knob 10. The hollow shaft 12 is provided with a head 16 of the knob.
It is slidably inserted into a hub (boss) 18 in the inside (see FIGS. 3 and 4). Hollow shaft flange 14 and hub 18 flange 1
9, a spring 20 is disposed, and the flange 14 of the hollow shaft is urged in a protruding direction by the spring. Reference numeral 22 denotes a knob flange, and reference numeral 24 denotes a hole into which the operation shaft 26 is inserted.

[0008] Electrical components, such as rotary volume 28
Is projected from the main body chassis 30, and this operation shaft 26 is inserted into the hole 24 of the hollow shaft 12 serving as a knob. 3
Reference numeral 2 denotes a fixing projection. In this state, the head of the knob 1
When the finger 6 is pressed with a finger or the like, the hollow shaft 12 and the flange 14 of the knob are pushed into the head 16 and fixed as shown in FIG. When using the knob, if the head 16 of the knob is pushed in again, the knob returns to the original position shown in FIG. 1 and the knob can be operated.

A structure in which the knob is fixed as described above is conventionally known, and this structure is shown in FIGS.
It will be described based on. FIG. 5 shows a normal state before the flange 14 of the hollow shaft 12 is pushed. A part of the surface of the hollow shaft 12 is cut out to form a flat part 44, and an engaging / guide member 46 having a shape as shown in FIG. Then, this engagement / guide member 46
A hook 48 made of a flexible material that engages with the inside of the hub 18 is attached to the inner surface of the hub 18. In the normal state shown in FIG. 5, the distal end of the hollow shaft 12 is located away from the claw 48. However, when the flange 14 is pushed in, the claw 48 is disengaged from the engagement / guide member 46 as shown in FIG. The groove 54 between the end projection 50 and the inner projection 52 is engaged. When the hand is released from the flange 14 in this state, as shown in FIG. 7, the flange 14 is pressed and returned by the urging force of the spring, and the pawl 48 is
Is engaged with the groove 60 between the central projections 56 and 58 and is fixed.

When operating the knob, as shown in FIG. 8, when the flange 14 is pushed in, the claw 48 is engaged with the groove 64 between the internal projection 52 and the projection frame 62. Then, collar 14
When the user releases his / her hand, as shown in FIG. 9, the flange portion 14 is pressed and returned by the urging force of the spring, and as shown in FIG. Thus, the collar 14 returns to the end. That is, a normal state is set.

The above structure is a structure of a conventional knob and a main body chassis. In this structure, as shown in FIG.
One (four in FIG. 1 as an example) projections 40 are provided, and a locking hole 42 in which the projections 40 are fitted is provided in the main body chassis 30. A large number of locking holes 42 are provided at a pitch smaller than the pitch of the projections so that the knob projections 40 can be easily fitted. The operation knob 10 is shown in FIG.
In the use state shown in FIG. 7, the projection 40 does not fit into the locking hole 42 because the hollow shaft 12 is projected, and the projection 40
Moves freely, and the knob 10 can be rotated. When the operation knob 10 is pushed in the direction of the main body chassis 30, the knob 10 is in a state where the hollow shaft 12 is pushed into the head 16 of the knob as shown in FIG.
Is fitted into the locking hole 42, and the knob 10 is locked without rotating. When the knob 10 is pushed again toward the main body chassis 30, the knob 10 returns to the state shown in FIG. 1 and the knob can be rotated.

In the present embodiment, the case where the locking hole 42 is provided in the main body chassis 30 has been described. However, instead of the locking hole, a locking concave portion is provided in the main body chassis 30 or the projection 40 abuts. An elastic member having a large frictional resistance (friction coefficient) such as a sponge to be engaged may be provided on the main body chassis 30. Note that the surface of the head 16 of the knob may be fixed substantially in the same plane as the panel surface, or may not be fixed in the substantially same plane (may be pushed in or protruded from the panel surface). .

As a second embodiment of the present invention, a locking mechanism having a structure in which a projection is provided on the main body chassis 30 and the projection is fitted to the operation knob 10 can be used. That is, at least one projection is provided on the main body chassis 30,
The locking mechanism is provided by providing a locking hole or a locking recess in which the projection fits into the flange portion 22 on the back surface of the operation knob 10, or an elastic member having a large frictional resistance such as a sponge with which the projection abuts and engages. Configure. Other configurations and operations are the same as those in the first embodiment.

As a third embodiment of the present invention, a structure in which an elastic member having a large frictional resistance such as a sponge is provided on the back surface of the operation knob 10 or on the main body chassis 30 at a portion where the operation knob comes into contact. . In this embodiment, the locking projection and the locking hole (or the locking recess) are not required. Other configurations and operations are the same as those in the first embodiment.

[0015]

As described above, the present invention has the following effects. (1) A lock mechanism is configured between the operation knob and the main body chassis. The knob is pushed in and the movement in the rotation direction can be fixed at the same time. It does not rotate, and erroneous operation can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an operation knob provided with a lock mechanism according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the knob shown in FIG. 1 in a state where the hollow shaft of the knob is pushed in and fixed.

FIG. 3 is a sectional view showing a normal state of an operation knob provided with a lock mechanism according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state where the operation knob is pushed in and locked from the state shown in FIG. 3;

FIG. 5 is an explanatory sectional view showing a relationship between a hollow shaft and a hub of the hollow shaft in a normal state in a general operation knob.

FIG. 6 is an explanatory cross-sectional view showing a state where it is pushed from the state shown in FIG. 5;

FIG. 7 is an explanatory cross-sectional view showing a state where the hand is released from the state shown in FIG. 6;

FIG. 8 is an explanatory cross-sectional view showing a state where the state shown in FIG. 7 is pushed again.

9 is an explanatory sectional view showing a state in which the user releases his / her hand from the state shown in FIG.

10 is an explanatory cross-sectional view showing a state where the state has returned from the state shown in FIG. 9 to the end;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 operation knob 12 hollow shaft 14 hollow shaft flange 16 knob head 18 hub 19 hub flange 20 spring 22 knob flange 24 hole for inserting operating shaft 26 operating shaft 28 rotary volume 30 main body chassis 32 Projection 40 Projection 42 Locking hole 44 Flat part 46 Engagement / guide member 48 Claw 50 End projection 52 Internal projection 54, 60, 64 Groove 56, 58 Central projection 62 Projection frame

Claims (5)

[Claims] An operation knob which is fixed at a position different from a normal state when the operation knob is pushed in, and is returned to a position of the normal state when the operation knob is pushed again, wherein a back surface of the operation knob and a main body chassis are connected to each other. An operation knob having a lock mechanism, wherein a lock mechanism is formed therebetween, and the operation knob is fixed while the operation knob is pushed in, and the movement in the rotation direction is also fixed. 2. An operation knob provided with a lock mechanism according to claim 1, wherein the position different from the normal state is such that the panel surface and the head surface of the operation knob are substantially at the same position. 3. The lock mechanism has a structure in which at least one projection is provided on a back surface of the operation knob, and a locking hole or a recess is provided in the main body chassis so that the projection is fitted.
Or an operation knob provided with the lock mechanism according to 2. 4. The locking mechanism according to claim 1, wherein the main body chassis has at least one protrusion, and a lock hole or a concave portion is provided on a back surface of the operation knob so that the protrusion is fitted.
Or an operation knob provided with the lock mechanism according to 2. 5. The lock mechanism according to claim 1, wherein a back surface of the operation knob or
3. A structure having an elastic member having a large frictional resistance at a portion where the operation knob of the main body chassis abuts and engages.
An operation knob provided with the lock mechanism described above.