JPS5830347Y2 - Tuning circuit structure housing structure in television receiver - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for housing a channel selection circuitry in a television receiver.

In television receivers that use electronic channel selection, as shown in FIG. Usually, it is housed in a cabinet so that it can be freely drawn out, so that the potentiometer and band changeover switch can be adjusted as necessary.

In such a case, a configuration in which not only the potentiometer and the band changeover switch but also the connecting conductive portion of the circuit are exposed is undesirable from the viewpoint of the Electrical Appliance and Material Control Law.

The present invention proposes a new storage structure in which a means is provided that allows only a certain portion of the channel selection circuit component to be pulled out, but no more than that, and is devised so that this means does not have a negative effect on the assembly. It is something.

The present invention will be described in detail below according to embodiments shown in the drawings.

FIG. 2 is a back view showing the state before the tuning circuit component 2 is housed in the fixed body 3, and the fixed body 3 has a sliding hole 4 as shown in FIG. 4 is provided by integrally forming a first rib 5 protruding into the inside.

Although the fixed body 3 is shown as a single unit that fits into the cabinet of the television receiver, the cabinet itself may have this function instead of being formed separately from the cabinet.

As shown in FIG. 5, the channel selection circuit structure 2 includes a base 6, sliding frames 7, 8 extending in parallel from the base 6, a pedestal 9, an elastic claw 10, a second rib 11. A printed wiring board 13 that is formed by integrally molding the third rib 12 and includes a channel selection circuit.
It is formed by combining.

14 is a potentiometer, which can be adjusted individually by a knob 15.

16 is an IC unit, and 17 is an external connection terminal to which a lead wire 18 is connected.

Note that the band changeover switch is omitted.

These electrical components are connected to each other by a copper foil pattern formed on the back surface of the printed wiring board 13.

The printed wiring board 13 is attached with approximately half of it placed on the pedestal portion 9, but the structure of the attachment is not particularly illustrated.

The function of the elastic claw piece 10 provided on the inner lower part of the sliding frames 7, 8 will be described in detail later, but this elastic claw piece 10
The second and third ribs 11 and 12 provided near the tip of the elastic claw piece 10 suppress the movement of the elastic claw piece 10 within a certain range, thereby preventing damage to the elastic claw piece.

FIG. 4 shows a sectional view taken along the line BB' in FIG. 2 of the channel selection circuit structure 2.

The appearance of the elastic claw piece 10 and the first rib 5 when attaching the channel selection circuit structure 2 to the television receiver via the fixing member 3 is shown in FIGS. 6 and 7.

During the insertion of the channel selection circuit structure 2, the elastic claw piece 10 touches the fixed body 3.
Although it is slightly displaced by the first rib 5 as shown in FIG. 6, when it is further inserted, it is released from the first rib 5 and returns to its original state as shown in FIG.

Therefore, when pulling out the tuning circuit component 2 after installing it as described above, the elastic claw piece 10 comes into contact with the first rib 5 of the fixed body 3 when the component 2 is pulled out halfway (the eighth (see figure), you will not be able to withdraw any more.

At this time, if the tensile force is applied more strongly than necessary, the elastic claw piece 10 will move along the contact surface of the first rib 5 while remaining in contact with the first rib 5, but as mentioned earlier, this Since the displacement is suppressed within a certain range by the second and second ribs 11 and 12, the elastic claw piece 10 will not bend beyond the allowable range and be damaged.

As explained above, according to the storage structure of the present invention, only the part of the tuning circuit component where the potentiometer and band selection switch are arranged (in some cases, only the adjustment knobs thereof) can be pulled out, and the circuit can be connected. This has the safety effect of not exposing conductive parts or live parts.

In addition, during assembly, by simply inserting the channel selection circuit component through the insertion opening of the fixed body, the elastic claw piece integrally formed on the component comes into contact with the rib formed integrally on the fixed body. It has an extremely simple structure that prevents withdrawals beyond a certain level, so it is also an advantage in that it eliminates the need to use other parts to prevent withdrawals beyond a certain level, reducing the number of parts. The idea is very useful.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing how the channel selection circuit assembly is housed in a television receiver so as to be freely drawn out. Figure 2 and the following figures all relate to the storage structure of the present invention. Figure 2 is a back view showing the state before the channel selection circuit component is inserted into the fixed body, and Figure 3 is A of Figure 2. 4 is a sectional view taken along line BB' in FIG. 2. Figure 5 is an exploded perspective view of the channel selection circuit structure, Figures 6 and 7.
The figure is a drawing showing how the tuning circuit structure is installed.
FIG. 8 is a perspective view showing the structure of the main part. 2... Tuning circuit configuration body, 3... Fixed body, 4... Sliding hole, 5... First rib, 1
0...Elastic claw piece.

Claims (1)

[Scope of utility model registration request] In a device in which the channel selection circuit component can be freely pulled out and housed in a television receiver, a sliding hole is formed in a fixed body that forms part of the external contour of the receiver, and a sliding hole is formed in the fixed body, and a sliding hole is protruded into the hole. A rib is formed integrally with the fixed body,
On the other hand, an elastic claw piece opening outward is integrally formed inside the tuning circuit component which is configured to be freely drawn out through the sliding hole and is equipped with adjustment parts, and is integral with the component. When attaching, the claw piece enters in a bent state by the rib, but as it continues to enter, it is released from the rib, and when pulled out from the released state, the claw piece is blocked by the rib and the structure exceeds a certain level. A structure for storing a channel selection circuit component in a television receiver, characterized in that the body cannot be pulled out.