JPS6213845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a band switching mechanism in a push-button tuner, and particularly relates to a mechanism for switching the reception band of the tuner in response to a push button being pressed. .

A push button tuner selects a predetermined push button from among a plurality of push buttons that are built into the tuner body so as to be able to move back and forth, and by pressing this button, the frequency that has been set in advance for that push button is set. It is something that makes you synchronize. In addition, this push button tuner allows you to select and receive multiple bands such as AM, FM, etc. When you select and press a predetermined push button,
The reception band of the tuner is changed according to the push of the button.

Incidentally, in such a push-button tuner, frequency selection and reception band switching are performed using a single arm attached to the push-button. That is, as shown in FIG. 1, a change plate 2 is disposed on the distal end side of the cross arm 1 in a direction perpendicular to the cross arm 1, and this change plate 2 is pressed by a pin 3 provided at the distal end of the cross arm 1. By doing this, the reception band was switched. Further, a setting plate 4 is provided in the center of the arm 1 apart from the pin 3, and a pressing projection 5 provided on the setting plate 4 allows the memory slide 4, which is also provided in a direction perpendicular to the arm 1, to be set. 6 was moved and the position of the core linked to the memory slide was adjusted to perform synchronized operation.

However, in this conventional type, the pin 3 for band switching and the setting plate 4 for tuning are located at the tip and center of the arm arm 1.
Since they were arranged at completely different positions, the overall length of the arm arm 1 inevitably became longer, which resulted in a drawback that the overall depth of the push button tuner also increased. In particular, the setting plate 4 that performs the tuning function needs to be attached to the arm arm 1 so that it can be rotated and fixed, but the fixing means such as a presser spring for this purpose is complicated, so it is difficult to use a tuning mechanism part like this. It has been common knowledge in the prior art to provide the band switching portion as separate from the band switching portion as possible. However, if the band switching section and the tuning section are provided separately in this way, the length of the arm arm becomes longer as described above, and a dedicated member must be provided for each, which increases the arm arm mechanism. The structure has become complicated, and the number of parts has also increased, making assembly difficult.

The present invention has been proposed to solve the above-mentioned drawbacks of the conventional type. That is, an object of the present invention is to utilize the setting pin, which is the support shaft of the setting plate provided on the arm arm, as it is as the pressing pin of the change plate for band switching, thereby replacing the setting pin that was previously provided separately. Provided is a new push-button tuner band switching mechanism that integrates the band switching section and tuning section that were previously used, shortens the depth of the arm arm, and reduces the number of parts installed on the arm arm. It's about doing.

Hereinafter, the present invention will be specifically explained based on the embodiments shown in FIGS. 2 and 3.

The push button tuner has multiple push buttons 10 and their arms 1.
1 is built in so that it can move freely back and forth. A setting pin 12 is protruded from the arm 11 of each push button 10, and a setting plate 13 is rotatably attached to the setting pin 12. A flange 14 is provided on the upper part of the setting pin 12 so as to protrude from the upper surface of the setting plate 13, and this flange 14 locks the setting plate 13 so that it does not come off from the setting pin 12. has been done. The setting plate 13 has a teardrop shape as a whole, with the distal end of the arm arm having an arc shape and the proximal end of the arm arm (the push button 10 side) having a triangular shape. A memory slide pressing protrusion 15 is provided on the proximal end side of the metal member 11 so as to face upward. Furthermore, a substantially U-shaped plate spring 16 is provided on the upper surface of the armrest 11 so as to surround the setting plate 13. The front end of the plate spring 16 is fixed to the armrest 11, while the left and right base end portions are extended toward the base end of the armrest 11 and fitted inside the push button 10. An arc-shaped tightening portion 17 is formed inside the tip of the plate spring 16.
7 is crimped around the setting plate 13.

A memory slide 18 is disposed above the setting plate 13, that is, in a portion between the setting pin 12 and the pressing protrusion 15, so as to run perpendicularly to each arm 11. The memory slide 18 is supported so as to be movable left and right with respect to the frame of the push button tuner, and has a front surface, that is, an edge on the push button 10 side facing the pressing protrusion 15 provided on each arm arm 11. A V-shaped notch 19 is formed.

Note that one end of this memory slide 18 is connected to a core slide that is movably attached to the push button tuner in the front and back direction, and the core provided on the core slide is inserted into a tuning coil that is fixed on a board. It has been inserted.

A change plate 20 is provided above the distal end side of the arm 11 in parallel with the memory slide 18. This change plate 20 is provided so as to be movable left and right with respect to the push button tuner. A notch 21 is formed on the front surface of the change plate 20 so as to face the flange 14 of the setting pin 12 provided on each cross arm 11. A tapered portion 22 is formed at the edge of the notch 21. In this case, the tapered portions 22 provided in each notch 21 are provided at different positions depending on the band selected by the push button 10 corresponding to the notch 21, and in the illustrated embodiment, A taper portion 22 is formed on the left side of the notch for the push button for selecting the AM band, while a tapered portion is provided on the right side of the notch 21 for the push button for selecting the FM band. . Further, the change plate 20 is provided with a switching protrusion 23 connected to a band switching switch fixed to the substrate of the push button tuner.

The band switching mechanism of the present invention has the above-mentioned configuration, and its operation will be explained next.

During push button synchronization, when a predetermined push button is selected and pressed, the pressing protrusion 15 of the setting plate 13 fixed on the arm 11 of this push button is pressed.
engages with the V-shaped notch 19 of the memory slide 18 and moves the memory slide 18 in the lateral direction while moving along the inclined surface. The memory slide 18 stops at the position where the pressing protrusion 15 reaches the apex of the V-shaped notch 19, and depending on the stopping position of the memory slide 18, the core interlocks with this via the link and the core slide. A stopping position within the tuned coil is determined and a predetermined frequency is selected.

In this way, when the push button 10 is pushed in and the arm 11 performs a synchronized operation, the flange 14 provided on the upper part of the setting pin 12 simultaneously enters into the notch 21 of the change plate 20. At that time, the change plate 20 comes into contact with the tapered part 22 provided at the edge of the notch part 21, and moves the change plate 20 laterally along the tapered part 22.
As a result, the changeover switch connected to the changeover protrusion 23 of the change plate 20 is operated, and the reception band corresponding to the push button is switched. On the other hand, in order to switch the receiving band of the tuner to another band, the other push button 10 is pressed and the flange 14 of the setting pin 12 is pressed against the other notch 21 of the change plate 20. In this case, since a tapered part 22 is formed on the edge of the other notch 21 on the side opposite to the notch 21, the flange 1 of the setting pin 12
4 comes into contact with the tapered portion 22 on the opposite side, and moves the change plate 20 to the opposite side.

As shown in the above embodiments, the band switching mechanism of the present invention utilizes the tip of the setting pin 12 provided at the tuning portion of the arm arm 11 as a member for pressing the change plate 20. Therefore, according to the present invention, there is no need to separately provide a pin for pressing the change plate as in the conventional type, and the number of parts constituting the arms can be reduced accordingly. Moreover, since this setting pin 12 is a member provided on the tuning part on the arm 11, the setting pin 12 is a member provided in the tuning part on the arm 11. 11 becomes extremely short, and the depth dimension of the push button tuner can be made small.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of a conventional band switching mechanism, FIG. 2 is a plan view showing an example of the band switching mechanism of the present invention, and FIG. 3 is a longitudinal sectional view of the same. 10...Push button, 11...Archive, 12...Setting pin, 13...Setting plate, 1
4...flange, 15..., pressing protrusion, 16...
Plate spring, 17...Tightening part, 18...
...Memory slide, 19...V-shaped notch, 2
0... Change plate, 21... Notch, 2
2...Tapered portion, 23...Switching protrusion.

Claims (1)

[Claims] 1. A setting pin is fixed on the arm of the push button tuner, a setting plate is rotatably attached to the setting pin, and a plate spring for fixing the setting plate is provided on the arm, while , a change plate is movably disposed in a direction perpendicular to the cross arm, a notch is formed in the change plate opposite to the setting pin, and a taper is provided at the edge of the notch. A band switching mechanism for a push-button tuner, characterized in that a setting pin is slidably brought into contact with the setting pin.