JPH0424841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary knob structure for electronic components such as rotary variable resistors and rotary switches.

[Prior art]

2. Description of the Related Art Rotary electronic components equipped with rotary knobs such as rotary variable resistors and rotary switches are often used in electronic devices. For example, a radio receiver is provided with a rotary variable resistor equipped with a rotary knob for channel selection and volume adjustment. By rotating the rotary knob, the user selects a desired channel, displays the channel selection using the channel selection indicator, and adjusts the volume.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional rotary knob structure, especially in a rotary knob structure where a smaller and thinner structure is desired, when the rotary knob is fully rotated in one direction,
Furthermore, if this rotary knob is forcibly rotated in the same direction, the locking mechanism that restricts the rotation of the rotary knob, the rotation of a rotary variable resistor, etc. that operates in conjunction with the rotation of the rotary knob, or the gear mechanism, etc. There was a problem in that the parts that were used were destroyed. Particularly in electronic devices that are smaller and thinner, the rotary electronic components used therein are also required to be smaller and thinner, so the strength of the component parts is also low, and if you forcefully turn the rotary knob, these parts will easily break. The problem is that it gets destroyed.

The present invention has been made in view of the above-mentioned points, and even if the rotating knob is forcibly rotated in one direction, when the torque applied to the rotating body exceeds a predetermined value, the engagement that transmits the rotational force of the rotating knob to the rotating body is made. To provide a rotary knob structure for an electronic component configured so that engagement of a mechanism is automatically released and the rotary knob does not rotate idly and destroy or damage other components.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a plate-shaped rotating body and a rotating knob, which are arranged opposite to each other, have at least a flat opposing surface, and are rotatable about an axis perpendicular to the opposing surface. The rotating body or rotating knob is equipped with a V that extends radially around the axis.
A cantilever-shaped leaf spring is formed by providing a through groove in the shape of a letter, and a convex part or a concave part is formed in the leaf spring, and a surface of the rotating body or rotating knob facing the convex part or the concave part of the leaf spring is is characterized in that a concave or convex portion that engages with the convex or concave portion is formed, and the convex or concave portion of the plate spring is engaged with the concave or convex portion of the rotary body or the rotary knob.

[Effect]

By configuring the rotary knob structure of the electronic component as described above, when the rotary knob is rotated in any one direction beyond the limit, the leaf spring is deflected away from the rotating body or the opposing surface of the rotary knob, causing a protrusion. The engagement between the part and the concave part becomes disengaged, and the convex part rides on the rotating body or the opposing surface of the rotating knob, causing the rotating knob to rotate idly, resulting in destruction of other parts or damage to these parts. There is no.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing a schematic configuration of a rotary knob structure for an electronic component according to the present invention.

In the figure, the rotary knob structure includes a rotary knob 1 and a rotating body 2 that rotates by receiving rotational force from the rotary knob 1. Note that 3 and 4 are gears that rotate in conjunction with the rotation of the rotating body 2.

The rotary knob 1 is formed into a disk shape from a resin material or the like, and a rotary shaft 13 is inserted in the center of the rotary knob 1 into a rotary support hole 21 formed in the center of a rotating body 2, which will be described later. is formed. Also,
Approximately V-shaped grooves 14, 14 passing through both sides of the rotary knob 1 are formed on both sides of the rotary shaft 13, so that a cantilever-shaped leaf spring 11, 11 is formed. Convex portions 12, 12 are formed at the tips of the leaf springs 11, 11 to engage with concave portions 22 of the rotating body 2, which will be described later. Furthermore, fine grooves are formed on the outer periphery of the rotary knob 1 in order to make it easier for the fingers to rest on the rotary knob 1 when rotating the rotary knob 1 with the fingers.

The rotary body 2 is formed of a synthetic resin material or the like into a disk shape, and a rotary support hole 21 having a shape and size through which the rotary shaft 13 of the rotary knob 1 is inserted is formed in the center of the rotary body 2. ing. Further, the plate spring 1 is provided on the surface of the rotating body 2 facing the rotating knob 1.
1, 11 Concave portion 2 in which the convex portions 12, 12 at the tips engage
A plurality of (four in the figure) 2 are provided circumferentially at equal intervals.

The rotating shaft 13 at the center of the rotating knob 1 is connected to the rotating body 2.
The convex parts 12, 12 at the tips of the plate springs 11, 11 of the rotary knob 1 are inserted through the rotation support hole 21 in the center of the rotary knob 1.
By inserting it into the recess 22 of the rotating body 2, a rotating knob structure with a cross-sectional structure as shown in FIG. 2 is obtained. Here, when the rotary knob 1 is rotated with a finger or the like, the rotational force is transferred to the rotary body 2 due to the engagement between the convex portions 12, 12 of the rotary knob 1 and the concave portion 22 of the rotary body 2.
The rotation body 2 rotates. This rotating body 2
The gears 3 and 4 also rotate in conjunction with the rotation of the gears.
In conjunction with the rotation of the gear 4, for example, a sliding type of a rotary variable resistor or a sliding type of a rotary movable switch is configured to rotate.

In the rotary knob structure of the above structure, normally the convex parts 12, 12 of the rotary knob 1 are engaged with the concave parts 22, 22 of the rotating body 2, as shown in FIG. For example, the rotating body 2 also rotates in conjunction with this rotation.

When the gears 3 and 4, which are the driven parts, reach a predetermined position, that is, when they reach the rotation restriction position and their rotation is stopped, when the rotary knob 1 is further rotated in the same direction, the plate of the rotary knob 1 Spring 11, 11
is displaced as shown in FIG. 2b, and the convex portions 12, 12
The tip of the is mounted on the surface of the rotating body 2, and the convex portion 12,
12 and the recesses 22, 22 are disengaged, and the rotary knob 1 rotates idly. Therefore, even if the rotary knob 1 is rotated beyond the rotation restriction position, the rotary knob 1 will idle as described above, so that the rotary knob 1 and the gears 3, 4, etc. that rotate in conjunction with the rotary knob 1 will rotate idly as described above. The driven parts will not be destroyed or damaged.

Furthermore, if the convex portions 12, 12 of the rotary knob 1 are formed into a chevron shape as shown in FIG.
Since the deviation as shown in FIG. 2 of 1 and 11 is performed smoothly, the rotation of the rotary knob 1 is smooth, and no unpleasant noise is generated when the rotation knob 1 is turned idly.

When the rotary knob 1 is reversed from the above-mentioned idling state, the convex parts 12, 12 of the rotary knob 1 are again engaged with the concave part 22 of the rotating body 2 and become one body, and the driven parts such as the gear 3 and the gear 4 are turned in the opposite direction. rotated in the direction

In the above embodiment, the convex portions 12, 12 are provided at the tips of the leaf springs 11, 11, and the concave portion 22 with which the convex portions 12, 12 engage is provided on the opposing surface of the rotating body 2. It is not limited to,
As shown in FIG.
5 and 15, and a convex portion (not shown) that engages with the recessed portions 15 and 15 may be provided on the opposing surface of the rotating body 2.

〔Effect of the invention〕

As explained above, according to the present invention, when the rotary knob is rotated in any one direction beyond the limit, the leaf spring is deflected in a direction away from the rotating body or the opposing surface of the rotary knob, and the convex portion and the concave portion are The engagement is released and the convex portion rides on the opposing surface of the rotating body or rotating knob,
Since the rotary knob rotates idly, it does not destroy or damage other parts, and furthermore, when the rotary knob idles, it does not generate any unpleasant noise, which is an excellent effect.

In addition, the rotating body and rotating knob are made of plate-shaped bodies,
Furthermore, until the plate spring is formed by providing a V-shaped groove in the rotating body or the rotating knob, an excellent effect can be obtained in that the thickness of the rotating knob structure can be made extremely thin.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a rotating knob structure for an electronic component according to the present invention, FIGS. 2 a and b are sectional views showing the rotating knob structure for an electronic component according to the present invention, and FIG. FIG. 7 is a perspective view showing a rotary knob structure of another electronic component according to the invention. In the figure, 1... Rotating knob, 2... Rotating body, 3,
4... Gear, 11... Leaf spring, 12... Convex portion, 1
3... Rotating shaft, 14... Groove, 15... Recess, 21
... Rotation support hole, 22 ... recess.

Claims (1)

[Scope of Claims] 1. A plate-shaped rotating body and a rotating knob, which are arranged opposite to each other, have at least flat opposing surfaces, and are rotatable about an axis perpendicular to the opposing surfaces, A V-shaped through groove extending radially around the shaft is provided in the rotating body or the rotating knob to form a cantilever-like leaf spring, and a convex portion or a recess is formed in the leaf spring, and the rotation A concave part or convex part that engages with the convex part or concave part is formed on a surface of the body or rotary knob that faces the convex part or concave part of the plate spring, and the convex part or concave part of the plate spring and the rotary body or the rotary knob are formed. A rotary knob structure for an electronic component, characterized in that the knob is engaged with a recessed portion of the electronic component.