JPS6119563Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the invention of a clutch mechanism for a push-button tuner, and aims to provide an advantageous mechanism that reduces the number of parts required to construct the clutch mechanism in a push-button tuner and reduces the number of assembly steps. That is.

It is well known that a push-button tuner needs to be equipped with a fine-tuning mechanism by manual rotation and a one-touch tuning mechanism by push-button operation. It is necessary to establish the operation system, and to operate the push button, operate the clutch mechanism to switch the manual rotation tuning operation system to the push button tuning operation system, and then perform the tuning operation by operating the push button. By the way, the conventional clutch mechanism adopted for this purpose is as shown in FIG. 23 and a washer 36 are attached, and the clutch lever 24 whose base end is supported by the support bracket 22 is attached to the washer 36, and the passive part 32 of the clutch lever 24 is an operating piece 33 which is tilted by push button operation. The rotating shaft 35 is facing the clutch lever 24.
The pinion 31 is connected to the crown gear 28 by connecting the elastic member 34 attached to the sleeve 25 to the tip of the manual rotation synchronization shaft 30 as described above. The crown gear 28 is engaged with the friction material 2.
The clutch plate 26 is pressed against the clutch plate 26 fixed to the tip of the rotating shaft 35 via the clutch plate 7. However, when using such a conventional clutch lever 24, a crown gear 28 is simply attached to the clutch lever 24.
The pinion 3 was only used to change the pressure relationship between the clutch plate 26 and the friction material 27.
In order to attach the bullet plate 34 that engages the tip of the spring 1, it is necessary to interpose a collar 29 between the sleeve 25 and the crown gear 28, and a washer 36 to receive the elastic force of the spring 23. Because these components must be used, their overall structural relationship is complicated, the number of required parts is large, and a considerable number of man-hours are required to assemble them, which are disadvantageous.

The present invention has been devised to overcome the disadvantages of the conventional ones as described above, and its specific embodiment is as shown in FIG. That is, the clutch gear 1 and the support bracket 2 are attached to the machine frame 10, the spring 3 and the clutch lever 4 are attached to the rotating shaft 15 of the clutch gear 1, and the base end of the clutch lever 4 is pivotally supported by the support bracket 2. This is the same as the conventional one described above, but in the present invention, a protrusion 4a is provided on one side of the clutch lever 4, and the large diameter end of the spring 3 is supported by the clutch lever 4 itself. A bullet plate 9 is attached to the other side of the clutch lever 4, and the distal end of the manual rotation synchronization operation shaft 30, that is, the pointed end protruding from the pinion 31, is pressed against the circumferential side of the bullet plate 9. 31 is pressed against the crown gear 8. Rotating shaft 15 of the clutch gear 1 described above
A clutch plate 6 is fixed to the clutch plate 6.
is connected to the back surface of the crown gear 8 via the friction member 7, and the clutch lever 4 is operated by operating the passive part 32 with an operating piece 33 which is operated by push button operation, similar to that shown in FIG. Then, the elastic force of the spring 3 is released, and the pressure contact relationship between the clutch plate 6 and the crown gear 8 via the friction member 7 is released. Releasing the interlocking relationship with is similar to that shown in FIG.

According to the present invention as described above, the manual rotation operation shaft 30 is activated by actuating the clutch lever 4.
By canceling the interlocking relationship between the sleeve 25 and the collar 29, the desired clutch action can be obtained appropriately. Moreover, there is no need for a special washer 36 as in the conventional one, and a bullet plate 34 is interposed between the sleeve 25 and the collar 29. There is no need to fix the pinion 31 so that the tip of the pinion 31 is pressed into engagement with the crown gear 28, the spring 3 is supported by the protrusion 4a formed on the clutch lever 4, and the bullet plate 9 is attached to the clutch lever 4. As a result, the number of required parts is small, and the structure is simplified and the number of assembly steps is reduced, thereby achieving a preferable clutch function and reducing costs.

[Brief explanation of the drawing]

The drawings illustrate the technical contents of the present invention, in which FIG. 1 is a plan view of a conventional clutch mechanism for a push button tuner, and FIG. 2 is a plan view of the clutch mechanism according to the present invention. In these drawings, 1 is a clutch gear, 2 is a support bracket, 3 is a spring, 4 is a clutch lever, 4a is a projection thereof, 5 is a sleeve, 6 is a clutch plate, 7 is a friction member, 8 is a crown gear,
9 indicates a bullet plate.

Claims (1)

[Scope of utility model registration request] A clutch in which a clutch lever is mounted on a rotating shaft of a clutch gear, and a friction member is interposed between a clutch plate attached to the rotating shaft and a crown gear, and the friction member is interposed when the clutch lever is operated. In a device for switching the interlocking relationship between the plate and the crown gear, the spring is supported by a protrusion formed on one side of the clutch lever, and a projection is formed on the other side of the clutch lever relative to the crown gear. A clutch mechanism for a push-button synchronizer, which is equipped with a bullet plate for pressing the pinion of the manual rotation synchronization operation shaft.