JPS6134758Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a manual adjustment mechanism in a push-button tuner, and in particular improves the uncertainty in the rotation transmission function due to wear in the clutch portion of the mechanism.
The embodiment will be described in detail with reference to the drawings below. Reference numeral 1 denotes a tuning member comprising a tuning frequency regulation plate 3 having a shaft pin 2, which is slidable on the front and rear plates A ₁ and A ₂ of the device frame A. Supported. Reference numeral 4 denotes a horizontal movement plate disposed on the vessel frame A perpendicularly to the channel selection member 1, and a V
A letter-shaped cam portion 5 is provided, and when the channel selection member 1 is slid forward, the shaft pin 2 abuts against the cam portion 5, thereby causing the transverse movement plate 4 to move laterally. Reference numeral 6 denotes a clutch actuating plate arranged on the device frame A in parallel with the transverse moving plate 4, and a notch 7 having an inclined portion is provided in this clutch actuating plate, so that when the tuning member 1 is slid forward, the clutch operating plate 1
The protrusion 8 provided in the notch 7 abuts against the inclined part of the notch 7,
As a result, the clutch actuating plate 6 moves laterally against the urging force in the direction of arrow a. Reference numeral 9 denotes a variable tuning element that is variable in accordance with the lateral movement of the transverse movement plate 4, and 10 a manual adjustment mechanism, which includes a manual shaft 11 rotatably supported on the front plate _A1 of the instrument frame A, and this manual shaft 11. a main drive gear 12 that is shaft-locked to the main drive gear 12; first and second driven gears 13 and 14 that mesh with the main drive gear 12 at left and right positions, respectively;
First and second small-diameter friction wheels 15 and 16 are integrally provided to the driven gears 13 and 14, respectively, and these friction wheels 15 and 16 are in pressure contact with the outer periphery of the manual shaft 1.
A large-diameter friction wheel 18 is fixed to a rotary shaft 17 rotatably supported on the front plate _A1 of the container frame A in parallel with the rotary shaft 17.
and a large-diameter friction wheel 19 integrated with this friction wheel 18,
One end is pivotally supported by the manual shaft 11 and the other end is supported by the first manual shaft 11.
A first pivot lever 20 pivots on a shaft 13' of a driven gear 13, and one end is attached to a pivot ₂ on the front plate A1 of the container frame A.
1, the other end of which supports the shaft 14' of the second driven gear 14 through an elongated hole 22'; said shaft 13' on its upper edge during its tilting;
A tilting piece 2 forming an inclined cam surface 23 that makes the small diameter friction wheels 15 and 16 move away from the large diameter friction wheel 18 by coming into contact with and lifting up the small diameter friction wheels 14'.
4, and the manual shaft 11 and the shaft 14' of the second driven gear 14 are connected by a link piece 25. The large-diameter gear 19 meshes with a rack piece 26 extending from one end of the lateral moving plate 4, and the lower end of the tilting piece 24 is provided with a rack piece 26 extending from one end of the clutch actuating plate 6. Piece 27
It is engaged with an engagement step portion 28 formed in . 2
9 and 30 replace the small diameter friction wheels 15 and 16 with the large diameter friction wheel 1.
8, a spring 31 for restoring the tilting piece 24, and 32 an elastic piece for maintaining the meshing state between the rack piece 26 and the large-diameter gear 19.

Therefore, when the manual shaft 11 is rotated during use, the rotation is caused by the rotation of the 2
The transmission is transmitted to two driven gears 13 and 14, and further to small diameter friction wheels 15 and 16, and a large diameter friction wheel 1 in pressure contact therewith.
8, the transmission is transmitted to the large-diameter gear 19 integral therewith and the rack piece 26 meshing with the gear, and as the transverse movement plate 4 moves laterally, the variable tuning element 9 is varied. Further, when the channel selection member 1 is pressed, the protrusion 8 first acts on the slope of the notch 7 and moves laterally in the direction opposite to the arrow a. Then, the lower end of the tilting member 24 is pressed by the engagement step 28 provided on the actuating member 27, and the member 24 rotates clockwise, so that the inclined cam surface 23 on the upper edge of the tilting member 24 is rotated clockwise.
3' and 14', and thereby the driven gears 13,
14 rolls around the main drive gear 12 while maintaining its meshing state, and the first and second friction wheels 15 and 16, which are integrated therewith, separate from the large diameter friction wheel 18. Next, as the channel selection member 1 slides forward, the lateral movement plate 4 is moved by the abutting action between the shaft pin 2 and the cam part 5.
moves laterally, and as a result, the variable tuning element 9 is varied, and the large diameter gear 19 and the large diameter friction wheel 18 are rotated via the rack piece 27. At this time, the first and second small-diameter friction wheels 15 and 16 have already been connected to the large-diameter friction wheel 1.
8, the rotation of the large diameter friction wheel 18 is not transmitted to the manual shaft 11. That is, the large diameter friction wheel 18 and the small diameter friction wheels 15 and 16 constitute a clutch portion.

In addition, although the case where two driven gears with friction wheels are provided is shown above, the number is not necessarily limited to two. Furthermore, when the main gear is connected to the manual shaft via the universal joint, it goes without saying that the main gear and the driven gear may be mounted on a single rotating lever.

Generally, in the manual adjustment mechanism of this type of push-button tuner, it is necessary to reduce the variable stroke of the variable tuning element relative to the rotation speed of the manual shaft in order to facilitate tuning adjustment. The friction wheel is configured with a large diameter and the friction wheel on the manual shaft side is configured with a small diameter, but according to the conventional configuration,
Since the small-diameter friction wheel on the manual shaft side is single and rotates at a high number of revolutions, its wear becomes severe, resulting in a defect in which the rotation transmission function of the clutch section is greatly reduced over a long period of time.

However, according to the present application, the number of small-diameter friction wheels on the manual shaft side is increased and these are pressed into contact with the large-diameter friction wheel on the variable tuning element side, and the small-diameter friction wheels are brought into contact with the rotation of the manual shaft through meshing of gears. Since each of the small-diameter friction wheels is configured to be driven independently, it is possible to reduce the individual pressing force of the small-diameter friction wheels against the large-diameter friction wheels, thereby reducing the degree of wear of the small-diameter friction wheels. Since each of the large-diameter friction wheels has a rotation transmission function, it has the advantage that the rotation transmission function of the clutch portion as a whole can be reliably maintained for a long period of time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view, and FIG. 2 is an enlarged longitudinal sectional view with a portion omitted. In the figure, 1 is a tuning member, 4 is a transverse movement plate, 6 is a clutch actuation plate, 9 is a variable tuning element, 10 is a manual tuning mechanism, 11 is a manual shaft, 12 is a driving gear, 13, 14
15 and 16 are driven gears, 15 and 16 are small diameter friction wheels, 18 are large diameter friction wheels, 19 are large diameter gears, 20 and 22 are rotating levers, 23 is an inclined cam surface, 24 is a tilting piece, 25
is a link piece, 26 is a rack piece, 27 is an action piece,
28 is an engagement stepped portion.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of small-diameter friction wheels supported by a rotating lever that rotates with respect to the container frame are pressed onto the outer periphery of a large-diameter friction wheel that rotates in conjunction with a variable tuning element. With,
Each of the small-diameter friction wheels is integrally provided with a driven gear that meshes with a main drive gear rotated by a manual shaft, and tilts with respect to the container frame, and at the time of the tilting, the plurality of small-diameter friction wheels are separated from the large-diameter friction wheel. a push-button type tuner comprising a restorable tilting member, and an actuating member provided on a clutch actuating plate that is movable in relation to a tuning member, and that biases the tilting member for a tilting action when the clutch actuating plate is movable. Manual adjustment mechanism. (2) The push-button tuner according to claim 1, wherein each rotary lever supports one small-diameter friction wheel.