JPS6233374Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dial device that is most suitable for application to a frequency tuning device (tuning device) such as a radio receiver or a tuner.

Conventionally, dial devices for pocketable devices such as radio receivers and tuners that can be inserted into the chest pocket of clothes, etc., have been accidentally rotated when the device is inserted into or taken out of the chest pocket, causing the frequency to become untuned. There was a defect that could easily change unexpectedly.

The present invention was devised in view of the above-mentioned actual situation, and is designed to prevent the rotation of the dial shaft as necessary to prevent the dial shaft from rotating unexpectedly. The aim is to provide something that is simple and can be operated with a single touch.

An embodiment in which the present invention is applied to a dial device of a portable device such as a radio receiver or a tuner will be described below with reference to the drawings.

First of all, Figure 1 shows the entire pocketable device 1. On the top surface of the cabinet 2, which is made of ABS resin, there are a knob 3 for dial operation, a knob 4 for adjusting volume, and a jack for inserting an earphone plug. 5th grade is provided. Also, cabinet 2
A knob 6 for switching a power switch, knobs 7 and 8 for switching a band, etc. are provided on the front surface of the unit.

Next, FIGS. 2 and 3 show details of the dial shaft 10, and the dial shaft 10 is
Through holes 13 and 1 of chassis 11 and 12 are molded from ABS resin and provided inside the cabinet 2.
It is arranged to penetrate through 4. The dial shaft 10 is configured to be rotatable around the axis within the through holes 13 and 14 and movable in the axial direction (vertical direction), and is screwed to the upper end of the dial shaft 10 with a set screw 15. Rotation and movement in the axial direction are performed by a knob 3 fixed with a screw or the like. Note that the dial shaft 10 has a wide gear 16 provided thereon, for example, and a variable capacitor (frequency tuning element) 17.
The variable capacitor 17 is configured to be rotatably driven by a gear mechanism meshed with a gear 19 fixed to a rotating shaft 18 or by a threading method (not shown).

Next, the dial shaft 10 is provided with a positioning mechanism 21 for positioning it at two locations in the axial direction, and this positioning mechanism 21 is provided, for example, on the circumferential surface of the variable condenser shaft 10 in two stages in the axial direction. A pair of V grooves 22 and 23 provided, a spherical body 24 which is a positioning member that is selectively and elastically press-fitted into one of these, and a spring 2 that presses the spherical body 24.
It is composed of a click mechanism consisting of 5.
The sphere 24 and the spring 25 are connected to the chassis 11.
It is held in a holding part 26 that is integrally provided with.

Next, the dial shaft 10 is provided with a lock mechanism 28 for preventing its rotation. This lock mechanism 28 is composed of an engaged body 29 that faces each other in the axial direction of the dial shaft 10 and is fixed to the dial shaft 10, and a fixed engaging body. A chassis 12 is used as an example. Further, as the engaged body 29, for example, conductive rubber is used.

According to the dial device configured as above,
First, as shown in Figure 2, pinch the knob 3 and turn the dial shaft 1.
0 in one direction in the axial direction, upward in the figure, the sphere 24 is aligned with one V-groove 22.
In the state in which it is press-fitted, the engaged body 29 is separated from the chassis 12, which is the engaged body, and the locking mechanism 28 is in an unlocked state. In this state, the dial shaft 10 can be rotated smoothly using the knob 3, and frequency tuning operation (tuning operation) can be performed using the variable capacitor 17.

Next, as shown in FIG. 3, when the upper surface of the knob 3 is pressed with a fingertip and the dial shaft 10 is pushed in the other direction of the axis, which is the downward side in the figure, the sphere 24 is relatively inserted into the other V-groove 23. The dial shaft 10 is pressed into position by being moved in a click-like manner, and at the same time the dial shaft 10 is positioned at the position where it is pushed in. At the same time, the engaged body 29 is pressed onto the upper surface of the chassis 12, which is the engaging body. As a result, the lock mechanism 28 becomes locked, and the engaged body 2
The rotation of the dial shaft 10 is prevented (the rotational operation becomes extremely difficult) due to the frictional force caused by the pressure contact between the dial shaft 9 and the chassis 12, which is an engaging member.

Therefore, after the frequency tuning operation, the dial shaft 10 can be locked as described above by simply pressing down the knob 3 with a fingertip. Matsuko 3
By pulling up the dial shaft 10 as shown in FIG. 2, the lock can be released.

In the locking mechanism 28, when the ball 24 is press-fitted into the V-groove 23 as shown in FIG.
4 is configured such that the center P ₁ of the V-groove 23 is slightly biased downward from the center P ₂ of the V-groove 23 . With this configuration, the dial shaft 10 is pressed against the slope 23a of the V-groove 23 from the lateral side (in the direction of arrow a) of the sphere 24.
A pressing force component downward (in the direction of arrow b) can be generated, and the engaged body 29 can be effectively (strongly) pressed against the chassis 12, and the dial shaft 1
0 lock can be performed reliably.

Furthermore, if the engaged body 29 is made of conductive rubber and a metal bearing 31 is provided in the through hole 14 portion of the chassis 12 as shown in FIGS. It is preferable that no noise is generated due to charging when separated.

Next, FIG. 5 shows how to use the pocketable device 1 described above, in which the pocketable device 1 is inserted into the breast pocket 33 of clothes, and the knob 3 is viewed from above. Pinch and rotate with your fingertips to tune to the desired frequency (tuning).
After that, the dial shaft 10 is locked by pressing the knob 3 lightly downward with the index finger or the like, which is an extremely convenient method of use. Note that 34 is an earphone, which is inserted into the jack 5 through a plug 35.

Although the embodiments of the present invention have been described above, the present invention can be widely applied to various dial devices other than radio receivers and tuners.

Further, the positioning mechanism referred to in the present invention is not limited to that shown in the embodiments.

Further, as the locking mechanism of the present invention, in the embodiment, a so-called frictional engagement mechanism is shown in which the engaged body 29 made of conductive rubber and the chassis 12 are used, but a frictional engagement mechanism using a member other than rubber such as a leaf spring may also be used. Alternatively, it may be a so-called meshing engagement mechanism using gears, chrysanthemum seats, or the like.

As described above, the dial device of the present invention includes a dial shaft that is provided with a knob at one end and is configured to be rotatable around the axis and movable in the axial direction, and a dial shaft that rotates integrally with the dial shaft. a locking mechanism having an engaged body and a fixed engaging body, the engaged body and the engaging body facing each other in a direction substantially parallel to the axial direction of a dial shaft; A pair of V-grooves are provided in two stages in the axial direction of the dial shaft. By moving these pairs of V
a positioning member selectively engaged within the groove;
When the dial shaft is moved in one direction in the axial direction and the positioning member is engaged in one of the V grooves, the dial shaft is positioned so that the engaged body is separated from the engaging body, and the dial shaft is When the positioning member is moved in the other direction in the axial direction to engage the positioning member in the other V-groove, the dial shaft is positioned in a state in which the engaged body is pressed against the engaging body. Simply by pressing the knob with a fingertip and moving the dial shaft in the other direction in the axial direction, the engaged body is pressed against the engaging body and rotation of the dial shaft is prevented.

Therefore, in order to prevent the dial shaft from rotating unexpectedly, the rotation of the dial shaft can be prevented with a single touch as necessary. In particular, the positioning mechanism consisting of a pair of V grooves and a positioning member is For example, the structure is simpler and cheaper than a push-push type positioning mechanism, and although it is a very compact mechanism, the engaged body of the lock mechanism is securely pressed against the engaging body, and the dial Unexpected rotation of the shaft can be reliably prevented. Moreover, as the positioning member moves in the axial direction of the dial shaft, the positioning member clicks over the pair of V-grooves against elasticity. Although it is a mechanism, it provides a light click feeling, making it very easy to operate.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall perspective view, Figs. 2 and 3 are sectional views of the dial shaft portion, and Fig. 4 is a main part of the lock mechanism. The sectional view and FIG. 5 are perspective views showing the method of use. In addition, in the symbols used in the drawings, 3... dial operating knob, 10... dial shaft, 12...
... Chassis that is an engaging body, 13, 14 ... Through hole, 21 ... Positioning mechanism, 22, 23 ... V
Groove, 24... Chassis, which is a positioning member, 25
... Spring, 28 ... Lock mechanism, 29 ...
It is an engaged object.

Claims (1)

[Scope of Claim for Utility Model Registration] A dial shaft provided with a knob at one end and configured to be rotatable around the axis and movable in the axial direction; A locking mechanism has a combined and fixed engaging body, and the engaged body and the engaged body are opposed to each other in a direction substantially parallel to the axial direction of the dial shaft; A pair of V grooves are provided in two stages in the direction, and the dial is elastically biased to move in the direction in which it is engaged with the V grooves, and is moved in one direction and the other direction in the axial direction of the dial shaft. It has a positioning member selectively engaged in the pair of V-grooves, and when the dial shaft is moved in one direction in the axial direction and the positioning member is engaged in one of the V-grooves, the positioning member is engaged in the V-groove. When this dial shaft is positioned so that the engaging body is separated from the engaging body, and the dial shaft is moved in the other direction in the axial direction to engage the positioning member in the other V groove, the engaged body and a positioning mechanism configured to position the dial shaft in a state in which the dial shaft is pressed against the engaging body.