JPS643232Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dial device for electrical equipment such as a radio receiver.

In a dial device of a radio receiver that uses a dial rope, if the length of the dial rope is too short, the torque of the tuning shaft increases, resulting in poor tuning operability. On the other hand, if the dial rope is too long, it will slip at the tuning shaft, making it impossible to tune. Therefore, it is necessary to control the length of the dial rope within a certain range to make the tension of the dial rope uniform.

In view of this, the present invention proposes a dial device in which the chassis or cabinet is provided with a protrusion for setting the dial rope to a certain length, and the length of the dial rope is managed.
An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In each figure, 1 is a synthetic resin chassis,
A dial drum 2, a tuning shaft 3, and pulleys 4 and 5, which constitute a dial device, are respectively attached to the chassis. 6 is a cylindrical first projection provided integrally with the chassis 1 at the lower end of the left side 7 of the chassis 1; 8 is the upper side 9 of the chassis 1;
, a substantially L-shaped second protrusion integrally provided on the chassis 1 at a predetermined distance from the first protrusion 6 in accordance with the set dimensions of the dial rope; 10 is between the members forming the dial device, that is, the dial drum 2. A dial rope stretched between the tuning shaft 3 and the pulleys 4 and 5. Reference numeral 11 is a spring coil for applying tension to the dial rope. The protrusions 6 and 8 provided on the chassis 1 are prepared to have a fixed length using a jig dedicated to mass production or when creating a replacement dial rope of a fixed length during services such as dial rope replacement. Used to check the dimensions of the dial rope.

Next, we will explain the procedure for creating a replacement dial rope of a certain length and tensioning this dial rope during service.

As shown in Fig. 2, the dial rope 10 is hooked onto the first protrusion 6 and tied into a loop using the second protrusion 8 as a guide, thereby making the dimension A shown in Fig. 3 A constant. In other words, the loop-shaped dial rope 10 of a constant length can be easily and accurately created. More specifically, as shown in FIG. 2, the second protrusion 8 is parallel to the side surface of the chassis 1 and protrudes in a direction perpendicular to the direction in which the dial rope 10 is stretched. Since the stretched outer edge side (that is, the knot side of the rope) has a flat shape that gradually becomes thinner at an acute angle, by tying the knot of the dial rope here, the length of the dial rope can be regulated very accurately. Moreover, after tightening the knot, the dial rope can be easily removed from the projection 8 by simply pulling the edge of the dial rope 10 a little in a direction substantially perpendicular to the rope tensioning direction, that is, in the direction of the edge of the projection 8. I can do it.

Then, a dial rope 10 tied into a loop and set to a constant length is tied to one end of the spring coil 11 as shown in FIG. 3B. The spring coil 11 has the dial rope 10 tied to one end thereof, and the hook-shaped hook portion 12 at the other end is engaged with a small hole 13 provided in the dial drum 2. Next, the dial rope 10 is wound counterclockwise around the outer circumferential groove 14 of the dial drum 2, and then wound around the tuning shaft 3 four times, and the rope is hung on the pulleys 4, 5 and the dial drum 2 in this order.

The dial rope 10 stretched between the dial drum 2, the tuning shaft 3, and the pulleys 4 and 5 in this way is set to a constant length, so the dial rope 10 has a constant moderate tension. It will be stretched.

On the other hand, during mass production, the length of the dial rope 10, which is prepared to a certain length using another special jig and tied to one end of the spring coil 11, is measured at hand before the dial rope 10 is stretched. To check, do the following: That is, as shown in FIG. 4, the dial rope 10 is hooked onto the first projection 6, and the knot 15 between the dial rope 10 and the spring coil 11 is aligned with the inner end 16 of the second projection 8. Here, the loop-shaped dial rope 10 is a little shorter because it is tied to the spring coil 11, but the width W of the second protrusion 8 is approximately equal to the shortened dimension of the dial rope 10. Therefore, depending on whether the knot 15 of the dial rope 10 matches the inner end 16 of the second protrusion 8,
It is possible to check whether the dial rope 10 has reached the set length. In this manner, the length of the dial rope 10 tied to the spring coil 11 can be easily checked at hand during mass production.

Note that the length of the dial rope 10 to which the spring coil 11 is tied can be checked using the protrusions 6 and 8 not only during mass production but also during service.

Furthermore, in this embodiment, the protrusions 6 and 8 are connected to the chassis 1.
Although an example has been described in which the projections 6 and 8 are provided in a synthetic resin cabinet (not shown), the invention is not limited to this example.

As described above, the dial device according to the present invention has two protrusions on the chassis or cabinet for setting the dial rope to a certain length, and one of the protrusions is parallel to the surface of the chassis or cabinet. Since it protrudes in the direction perpendicular to the direction in which the dial rope is stretched, even if the protrusion extends a little longer, there is no risk of it getting in the way because the protrusion is parallel to the surface of the chassis or cabinet. . In addition, the shape of one of the protrusions is a flat shape that gradually becomes thinner at an acute angle on the outer edge side where the dial rope is stretched, so if you tie a knot on the dial rope here, the length of the dial rope can be determined extremely accurately. It can be regulated. Further, even if there is no fixed tree on hand during service, a replacement rope of a certain length can be easily, quickly and accurately made. Also, the length of the dial rope can be easily checked before the dial rope is stretched.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the dial device of the present invention;
FIG. 2 is a perspective view showing how a dial rope of a certain length is created using the dial device of the present invention;
3A, 3B, and 3C are views showing the procedure for connecting the dial rope to the spring coil, and FIG. 4 is a perspective view showing how the length of the dial rope is checked using the dial device of the present invention. 1... Chassis, 6... First protrusion, 8... Second protrusion, 10... Dial rope.

Claims (1)

[Scope of utility model registration request] A pair of dial ropes is attached to the side of the chassis or cabinet of the electrical equipment so that the dial rope tied in a loop is set to a certain length that will provide an appropriate tension when stretched between the members that make up the dial device. protrusions are provided at a predetermined interval, one of the pair of protrusions protruding in a direction substantially parallel to the surface of the chassis or cabinet and perpendicular to the direction in which the rope is stretched, and on the outer edge of the rope in which the rope is stretched. 1. A dial device for electrical equipment, characterized in that the dial rope has a flat shape that gradually becomes thinner at an acute angle, and a knot of a dial rope is made on the protrusion side of the flat shape.