JPH09102732A - Lock mechanism for rotary knob - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lock an adjustment rotary knob by using a means which moves a lock collar via the movement of the knob and prevents the rotation of the knob. SOLUTION: When a lock collar 13 is pushed down, the collar 13 touches the knife-edge part 18a of a lock plate 18 that is fixed to a frame 12 via screws 17a and 17b. The right and left voids are eliminated between a hole 13d and the head of a screw 9 when the collar 13 is engaged with the plate 18. Therefore, the rotation of the knob unified with the screw 9 is locked. For instance, an adjustment knob 2 is rotatively provided on a front panel 1 of a mini-disk recording/reproducing device in a friction state. Thus the recording levels of R and L channels can be controlled by the variable resistors 4 and 5, and the knob 2 can be operated by a single hand to control the balance between both channels.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism for a rotary knob used in a recording device such as MD or DAT.

[0002]

In a conventional recording device or the like, when the recording level adjusting knob is adjusted and the level is set, the setting knob is touched and the adjustment is deviated, or the left and right levels of the L channel and the R channel are adjusted. When adjusting with the coaxial knob, you had to use one hand while holding one with one hand and the other rotating.

[0003]

According to the present invention, in a rotary knob used in a recording device or the like, a knob, a cylindrical lock collar that slides along the outer circumference of the knob, and an inclined surface at one end of the lock collar are provided. Rotation including a knob that abuts and is operated from the outside of the panel, and means for moving the lock collar by the movement of the knob and abutting the other cylindrical end of the lock collar to the fixing member to prevent rotation of the knob It is a knob locking mechanism.

Further, according to the present invention, in a rotary knob used for a recording device or the like, the knob, a cylindrical lock collar which slides along the outer circumference of the knob, and an inclined surface at one end of the lock collar are brought into contact with the outside of the panel. A knob that is operated and moved,
A means for moving the lock collar by the movement of the knob to bring the other end of the lock collar into contact with a fixing member to prevent the lock collar from rotating, and a knob provided on the lock collar for connecting the knob to the volume shaft. A lock mechanism of a rotary knob, which comprises a screw fixed to the lock collar, and which abuts the screw in the hole in a state where the rotation of the lock collar is blocked, and blocks the rotation of the knob.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. 1 and 2 are views showing an embodiment of the present invention.
(a) is the figure seen from the upper surface of a front panel, (b) is a sectional side view. A plurality of adjusting knobs are arranged close to a front panel 1 of a recording / reproducing apparatus for a mini disk (MD). One of the knobs for adjusting the recording level 2
And 3 are provided so as to project from the hole 1a of the front panel 1, and are fixed to the friction type volume shafts 6 and 7 of the variable resistors 4 and 5 of the R and L channels by screws 8 and 9.

The variable resistors 4 and 5 are fixed to the frame 12 with a nut 11 through a hole provided in the frame 12 with a screw portion 10 connected integrally. The lock collar 1 is fitted around the knob 3 and has a cylindrical lock collar 13.
3 is slidably moved in the axial direction of the knob 3 and is pushed up from the frame 12 by the coil spring 14 and the stopper portion 13a.
Is brought into contact with the lower surface portion 3a of the knob 3.

An inclined surface 13 is provided at the upper end of the lock collar 13.
b is provided, the inclined surface 13b and the tip 16a of the knob 16 are brought into contact with each other by pushing the lock knob 16 that slides through the hole 1b provided in the front panel in the direction of the arrow, and the lock collar 13 is moved to the coil spring. Push down against 14.

When the lock collar 13 is pushed down, it comes into contact with the knife edge portion 18a of the lock plate 18 fixed to the frame 12 with screws 17a and 17b. FIG. 2 is a view showing a locked state of an embodiment of the present invention, and FIG. 3 is an enlarged view of the lock collar 13 and the knife edge portion 18a.

The peripheral portion of the lower end of the cylindrical portion of the lock collar 13 which abuts the knife edge portion 18a has a valley portion 13c which is connected and formed in an uneven shape, and the knife edge portion 18a is introduced into the valley portion 13c. In order to rotate the lock collar 13,
A hole 13d having a substantially triangular shape is provided so that the movable rotation range becomes narrower as the lock collar 13 approaches the knife edge portion 18a by the head of the screw 9.

With the lock collar 13 engaged with the lock plate 18, there is no space left and right with respect to the head of the screw 9 of the hole 13d. Therefore, in the locked state shown in FIG. 3B, the rotation of the knob 3 integrated with the screw 9 is locked. The knob 2 can be rotated in a friction state, and the recording level of the R channel can be adjusted, and the operation can be performed with one hand when adjusting the balance of the L and R channels.

Further, it is possible to prevent the level from being changed due to an erroneous operation of the recording state or accidental contact. Although the lock collar 13 and the lock plate 18 have been described with respect to the engagement relationship with the knife edge, a rubber damper or the like may be attached to the tip end portion for locking.

[0012]

According to the present invention, the rotary knob for adjustment can be locked.

[Brief description of the drawings]

FIG. 1 is a view showing a lock mechanism of a rotary knob according to an embodiment of the present invention, in which (a) is a top view and (b) is a side sectional view.

2A and 2B are diagrams showing a lock mechanism of a rotary knob according to an embodiment of the present invention, in which FIG. 2A is a top view and FIG. 2B is a side sectional view.

FIG. 3 is a diagram illustrating a locked state of the present invention.

[Explanation of symbols]

 1 Front Panel 2,3 Knob 4,5 Variable Resistor 6,7 Volume Shaft 8,9 Screw 10 Screw Part 11 Nut 12 Frame 13 Lock Collar 14 Coil Spring 15 Hole 16 Knob 17a, 17b Screw 18 Lock Plate

Claims (3)

[Claims] 1. A rotary knob for use in a recording device or the like, wherein the knob, a cylindrical lock collar that slides along the outer circumference of the knob, and an inclined surface at one end of the lock collar are operated from outside the panel. A lock for a rotary knob, comprising: a moving knob; and means for moving the lock collar by the movement of the knob to bring the other end of the lock collar into contact with a fixing member to prevent rotation of the knob. mechanism. 2. The rotary knob locking mechanism according to claim 1, wherein an outer knob of the dual volume is locked. 3. A rotary knob for use in a recording device or the like, wherein the knob, a cylindrical lock collar that slides along the outer periphery of the knob, and an inclined surface at one end of the lock collar are operated from outside the panel. A moving knob, a means for moving the lock collar by the movement of the knob to prevent the lock collar from rotating by abutting the cylindrical other end of the lock collar against the fixing member, and a hole provided in the lock collar. A lock for a rotary knob, comprising a screw for fixing the knob to a volume shaft, wherein the screw is brought into contact with the hole when the lock collar is prevented from rotating to prevent the knob from rotating. mechanism.