JPS5931055Y2 - push button tuner - Google Patents

Description

[Detailed Description of the Invention] The present invention is a simplified structure of a push-button tuner that can receive a plurality of reception frequency bands.

Conventionally, a push-button tuner capable of receiving multiple bands required an ordinary push-button tuner to be provided with an actuating plate for changing the band selection switch so that it would be displaced as the tuning member was depressed. .

Therefore, a space was required to install the actuating plate, which made the tuner that much larger, making it impossible to meet the strong demands of users for a thinner and more compact design.

In order to solve the above problems, the present invention makes it possible to downsize the tuner by making the band changeover switch actuation plate also serve as the clutch actuation plate.

Hereinafter, the present invention will be explained based on an embodiment. A is a picture frame, and a manual adjustment shaft 1 is supported on the sleeve of the front plate A'.

2 is a clutch mechanism in which a sleeve 3 slides on a clutch shaft 4, and a friction plate 5 on the sleeve 3 and a friction plate 6 on the clutch shaft 4 come into contact with and separate from each other.

γ is a transfer crank consisting of two parallel rods 8, and is supported on both sides of the picture frame A.

Reference numeral 9 denotes a tuning member, which is provided with a regulation plate 10 for recording the received frequency and has a stepped portion 11 formed therein.

Reference numeral 12 denotes a sliding plate that is installed on the picture frame A so as to be able to move laterally, and has a cam portion 13 formed thereon corresponding to the stepped portion 11, and further engages with a band changeover switch 14 at the end thereof to switch the switch. A notch 15 is formed with a width twice as large as the stroke required for this purpose.

A wedge-shaped sliding piece 16 is provided on the side wall of the frame A so as to be slidable back and forth, and is usually pulled sideways by a spring 11 to the front plate of the picture frame.

1B is a roller provided on the sliding piece 16, which faces the V-shaped hole 19 bored in the sliding plate 12, and is connected to the spring 1.
γ settles on the V-shaped bottom and regulates the position of the sliding plate 12.

13 is a sliding plate so that when the cam part presses the selection member, the sliding plate is moved equally on the left and right sides by the switching stroke of the band selection switch, centering on the sliding plate resting position. It is formed in 12.

The changeover switch is provided in the picture frame so that the center of the width of the cut arrow when the sliding plate is regulated in position coincides with the center of the switch changeover stroke width.

Reference numeral 20 denotes a clutch operating piece which, when the sliding piece 16 slides, tilts around a fulcrum plate 21 provided in the picture frame by means of an inclined portion 16', thereby bringing the clutch mechanism 2 into and out of contact with each other.

In the above configuration, when selecting a channel, for example, when the leftmost channel selection member 9 is pressed with the switch switched to the left as shown in FIG. However, until the forward movement of the tuning member stops, the sliding plate 12 is moved laterally to the left in FIG. 1 by the switching stroke of the band switching switch.

During this time, the roller 18 is pushed away from the front plate by the ■-shaped hole 19, so the sliding piece 16 integrated with the roller slides against the spring 17, and the inclined portion 16' causes the clutch actuating portion to By tilting the piece 20, the friction plates 5 and 6 are separated, the clutch mechanism is opened, and the transfer crank becomes freely rotatable.

Thereafter, the regulation plate collides with the transfer crank 1, and the received frequency is reproduced.

When the pressure on the channel selection member is released, the channel selection member is returned by the return spring 22, and the roller 18 is moved by the spring 1T.
Since it settles on the V-shaped bottom of the V-shaped hole 19, the sliding plate 12 is slid back to its original position.

On the other hand, in the clutch mechanism, while the roller falls to the bottom of the letter ■, the sliding piece approaches the front plate together with the roller, and the inclined part 1
6' is further away from the clutch actuating member 20, so the friction plate 5
6 is pressed by the spring 23 and the clutch mechanism is closed.

In the above operation, the clutch mechanism only opens and closes as the channel selection member moves forward and backward, but the switch 14 does not change.

Next, the channel selection member (for example, the first
When the slide plate 12 (second from the left in the figure) is pressed, the sliding plate 12 moves to the right in FIG. 1 and comes into contact with the contact portion 15' of the notch 15, thereby switching the band changeover switch to the right.

On the other hand, in the clutch mechanism, the inclined surface of the V-shaped hole on the opposite side to the above-mentioned case pushes up the roller and slides the sliding piece, so that the clutch mechanism is disconnected.

Thereafter, when the selection member is released, the roller settles on the V-shaped bottom and the sliding plate returns to its original position.

In this case, the engagement state between the switch 14 and the notch 15 is the third one.
It will look like the figure.

As described above, according to the present invention, the clutch mechanism 2 is connected to the sliding plate 1.
2 is designed to open and close when moved in either the left or right direction, but the band changeover switch will not open or close unless you press the channel selection member corresponding to the cam in the inclined direction of the cam corresponding to the previously pressed channel selection member. There is no need to switch.

Therefore, according to the present invention, a single sliding plate is used to operate the clutch mechanism and the band changeover switch, so the band changeover switch actuation plate used in the past can be omitted, and the structure is simplified. , a small push-button tuner can be obtained.

[Brief explanation of drawings]

FIG. 1 is an embodiment of the present invention, and FIGS. 2 and 3 are operational diagrams of the embodiment of the present invention. In the figure, A is the picture frame, R is the front plate, 2 is the clutch mechanism, T is the transfer crank, 9 is the channel selection member, 11 is the step, 12 is the sliding plate,
13 is a cam part, 14 is a band selection switch, 15 is a notch, 15' and 1! / is a contact portion, 16 is a sliding piece, 1T is a spring, 18 is a roller, 19 is a V-shaped hole, and 20 is a clutch actuating member.

Claims (1)

[Scope of utility model registration request] A plurality of channel selection members that are slidably mounted on the picture frame and each of which is assigned a reception band; a band changeover switch that switches to the band corresponding to the push button member by pressing the plurality of channel selection members; In a push-button tuner equipped with a clutch mechanism that is activated by pressing the tuning member, the tuning member is in a neutral position when the tuning member is not pressed, and when the tuning member is pressed, a selection is made corresponding to the tuning member. 1. A push-button tuner comprising a displacement member that is displaced in two directions from a neutral position depending on a band that has been set, and that the displacement member switches a band changeover switch and operates a clutch mechanism.