JPH064408Y2 - Magnetic head rotation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to a magnetic head rotating mechanism used in a cassette tape player or the like having an automatic reverse mechanism,
In particular, the present invention relates to a structure for preventing the lead wire of the magnetic head from being caught in a mechanism portion that rotationally drives the magnetic head.

(B) Prior Art A magnetic head rotating mechanism used in an auto-reverse mechanism of a cassette player is constructed as shown in the perspective view of the main part of FIG. 4, for example.

The magnetic head rotating mechanism shown in FIG. 4 is driven to rotate 180 degrees to perform automatic reverse reproduction and the like, and the magnetic head 1 is attached to one end and the lead wire 2 of the magnetic head 1 is attached. A rotary shaft 3 having a through hole through which it passes, a holder 4 that rotatably supports the rotary shaft 3, and a headgear 5 attached to the other end of the rotary shaft 3.
And a direction gear 6 that transmits rotation to the head gear 5, and a spring 7 that applies a rotational force to the direction gear 6.

In FIG. 4, 8 is an azimuth adjusting screw, 9 is an azimuth adjusting spring, 10 is a set screw for the direction gear 6, and 11 is a spring locking spring provided on the direction gear 6 for locking one end of the spring 7. Hook, 12
Is a spring locking hook provided on the holder 4 for locking the other end of the spring 7.

In the magnetic head rotating mechanism configured as shown in FIG. 4, the operation lever 61 formed on the direction gear 6 is driven and controlled, whereby the spring 7 accumulates a rotating force enough to rotationally drive the direction gear 6. ,
Alternatively, the accumulated rotational force is applied to the direction gear 6.

In this way, when the rotational force accumulated in the spring 7 is transmitted to the headgear 5, the headgear 5 is rotated by the rotating shaft 3
Can be rotated by 180 degrees to rotate the magnetic head 1 by 180 degrees for automatic reverse reproduction or the like.

(C) Problems to be solved by the invention However, in the magnetic head rotating mechanism of FIG. 4 described above, the lead wire 2 meshes with the head gear 5 and the direction gear 6 and the spring 7 that gives a rotating force to the direction gear 6. Since it is located in the vicinity of, due to the twisting of the lead wire 2 and instability of styling, it is caught between the gears 5 and 6, caught on the spring 7, or a hook for locking the spring 7. There was a drawback that it got caught in 11,12.

An object of the present invention is to provide a magnetic head rotating mechanism that solves the drawbacks of the conventional example.

(D) Means for Solving the Problem The magnetic head rotating mechanism of the present invention has a magnetic head attached to one end, a rotary shaft having a through hole through which the lead wire of the magnetic head passes, and the other end of the rotary shaft In a magnetic head rotating mechanism consisting of a mounted head gear, a direction gear that transmits a rotating force to this head gear, and a spring that gives a rotating force to this direction gear, a rib is provided on the direction gear and a lead wire of the magnetic head is provided. It is configured to prevent biting.

(E) Action The wiring position of the lead wire of the magnetic head can be regulated by the rib provided on the direction gear that transmits the rotational force to the head gear. Therefore, it is possible to prevent the lead wire from being caught between the head gear and the direction gear and from being caught by the spring or the spring locking hook.

(F) Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing the entire structure, FIG. 2 is a side view, and FIG. 3 is a perspective view of a direction gear.

The same parts as those in the conventional example of FIG. 4 described above are designated by the same reference numerals and the description thereof will be omitted.

The magnetic head rotating mechanism of the embodiment of the present invention shown in FIGS. 1 to 3 is provided with a rib 13 protruding downward from the lower surface of the direction gear 6 formed by molding. The rib 13 is formed in a substantially trapezoidal shape, and inclined portions are formed at both ends 13a, 13b thereof to prevent the lead wire 2 from being caught by the both ends 13a, 13b of the rib 13 and to prevent the lead wire 2 from being wired. It is made up of an arcuate portion 13c to be determined.

Further, the ribs 13 are spring locking hooks 11 and 12 respectively formed on the direction gear 6 and the holder 4 for locking the spring 7, and the spring 7.
Is formed so as to protrude outwardly higher than the position where is provided. (Refer to FIG. 2) With the above configuration, even if the direction gear 6 rotates, the lead wire 2 is regulated by the rib 13 pushing the wiring position outward, and the meshing of the gears 5 and 6 is achieved. It is possible to prevent the conventional bite without approaching the portion. Further, since the wiring position of the lead wire 2 is restricted with respect to the spring 7 and the hooks 11 and 12 for locking the spring 7, there is no fear of being caught.

(G) Effect of the Invention According to the magnetic head rotating mechanism according to the present invention, by providing the direction gear with the rib, the lead wire is caught between the head gear and the direction gear, and the spring or the spring locking spring. It can be prevented from getting caught in the hook. Moreover, the structure is simple, and since it can be constructed at a low cost, it has excellent features such as easy implementation.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention,
1 is a perspective view showing the overall structure, FIG. 2 is a side view, and FIG.
The figure is a perspective view of the direction gear. FIG. 4 is a perspective view showing the overall structure of a conventional example. Explanation of symbols of main parts 1: Magnetic head 2: Lead wire 3: Rotating shaft 4: Holder 5: Head gear 6: Direction gear 7: Spring 13: Rib

Claims (1)

[Scope of utility model registration request] 1. A magnetic head is attached to one end, and
A rotary shaft having a through hole for passing the lead wire of the magnetic head, and a head gear attached to the other end of the rotary shaft,
In a magnetic head rotating mechanism consisting of a direction gear that transmits a rotating force to this head gear and a spring that gives a rotating force to this direction gear, a rib is made to project to the lower surface of the direction gear, and the lead wire of the magnetic head is bitten. A magnetic head rotating mechanism characterized by being configured to prevent jamming.