JPH018016Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tuning axis in car radios and the like.

A conventional tuning axis is as shown in FIG.

A metal shaft 1 that transmits the movements of a listener has a two-stage diameter structure, and a slit 3 is provided in a large diameter portion 2 on the base end side, into which a knob (not shown) is fitted. Further, a knurled part 5 is provided at the boundary between the narrow diameter part 4 and the large diameter part 2,
A collar 6 is press-fitted into the knurled portion 5, and a shaft bearing 7 is rotatably fitted into the narrow-diameter portion 4. The tip of the narrow diameter portion 4 is caulked to the universal joint 8, thereby preventing the shaft bearing 7 from falling off in the direction of the tip. Further, a shaft 9 having a tuner driving pinion (not shown) is connected to the distal end side of the universal joint 8.

Incidentally, a screw is provided on the outer peripheral surface of the shaft bearing 7, and the shaft bearing 7 is fixed to an escutcheon or the like via a nut screwed onto the screw.

Here, the tuning shaft having the above-mentioned structure is a common part for various models, and must be slightly modified to correspond to each model. That is, car radios and the like are provided with a volume knob in addition to a tuning knob. and,
Regarding the volume knob, the sound quality adjustment knob may be provided on the same axis, and the outer diameter of the shaft will be different depending on whether the sound quality knob is provided on the same axis or not. For this reason, it is necessary to make the external appearance of the tuning shaft thicker or thinner.
These demands have been met by pivoting collars 6 with or without the collar 6 or with different outer diameters. However, since conventional collars are fixed by press-fitting, the reciprocity of the assembled tuning shafts is lost, making parts management extremely troublesome. In addition, the conventional type required a two-step diameter shaft, knurling, and press-fitting of the collar, making the manufacturing extremely troublesome.

An object of the present invention is to provide a new tuning shaft that eliminates the above-mentioned problems by allowing a collar to be fitted as appropriate depending on the situation after the tuning shaft is almost completely assembled.

Hereinafter, an embodiment of the present invention will be described based on FIG.

In this embodiment, a shaft 10, a pinion shaft 11
and a universal joint 12 that connects both shafts 10 and 11.
is integrally molded from synthetic resin. axis 10
The base end has a slit 13 so that a knob can be attached.
A collar locking groove 14 and a retaining ring groove 15 such as an E-ring are provided from the base end side. The universal joint 12 is generally called an Oldham joint, and as shown in the perspective view of FIG. The shaft 10 and pinion shaft 11 are connected by bending portions a and b extending from each other, and by bending these bending portions a and b, the relative inclination of each disk 16, 17, and 18 causes the shaft 10 and pinion shaft 11 to be This can absorb misalignment of the axis.

The shaft bearing 7 is fitted from the tip side of the shaft 10, and by fitting the E-ring 19 into the E-ring groove 15, movement of the shaft bearing 7 in the axial direction is restricted.

Furthermore, a collar 20 made of polyurethane resin or the like having appropriate elasticity is fitted from the base end of the shaft 10 as required.

An annular protrusion 21 that engages with the locking groove 14 is provided on the inner surface of the collar 20, and when the collar 20 is inserted to the required position, the annular protrusion 21 restores and engages with the locking groove 14. It's becoming like this. Thus, the collar 20 is prevented from falling off by the engagement between the locking groove 14 and the ring protrusion 21.

With the above structure, the collar 20 is inserted in the final step, so all models can be prepared in advance with the shaft 10 and shaft bearing 7 assembled, making product management extremely easy.
Also, the thrust force of the shaft bearing 7 itself is E
Since the ring 19 receives the locking force, the locking force of the collar 20 to the shaft 10 can be small since it is only necessary to prevent the collar 20 itself from falling off. Therefore, its insertion can be carried out very easily.

In the above embodiment, the shaft 10 is made of synthetic resin, but the shaft may be made of metal. FIG. 3 shows an embodiment using a metal shaft 10'.

As described above, according to the present invention, it is possible to easily manufacture and process the shafts, and there is no need to separately manufacture synchronized shafts depending on the presence or absence of collars, which improves work efficiency and facilitates parts management. When a collar is not required, the press-fitting process can be reduced and other excellent effects can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional tuning shaft, Fig. 2 is a sectional view of a tuning shaft according to the present invention, Fig. 3 is a sectional view of another embodiment, and Fig. 4 is a perspective view showing an example of a universal joint. It is a diagram. 10... Shaft, 14... Locking groove, 15... E-ring groove, 19... E-ring, 20... Collar, 21
... ring ridge.

Claims (1)

[Scope of utility model registration request] A locking groove and a retaining ring groove are sequentially provided on the shaft from its base end, a shaft bearing is fitted from the base end of the shaft, and the proximal portion of the shaft bearing is fitted into the retaining ring groove. A collar made of an elastic material and having a protrusion that engages with the locking groove on the inner surface can be fitted into the shaft on the proximal end side of the shaft bearing by a matching retaining ring. A tuning axis characterized by being configured in a similar manner.