JPH0418093Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a tape recorder capstan mounting device used for driving the tape at a constant speed in a tape recorder.

(b) Prior Art In tape recorders, it is common practice to run the tape at a constant speed by pressing the tape against the capstan using a pinch roller. If the pinch roller is pressed against the capstan with a strong pressure, the capstan will tilt and the tape will run unstable. In order to eliminate this drawback, the base of the capstan is rotatably supported by a bearing attached to the chassis as described in Japanese Utility Model Application Publication No. 58-10249, and the shaft of the capstan is supported on the back side of the capstan. It is described that a bracket extending toward the front end is attached to the chassis, and the base of the bracket functions as a radial bearing for the capstan, while the front end of the bracket supports the back of the capstan.

(c) Problems that the invention aims to solve However, even with the aforementioned bracket that supports the back of the capstan at the tip, if the flywheel is made heavier to increase inertia, it becomes difficult to use it while walking, such as with a portable tape recorder. If the tape recorder was tilted during operation, the flywheel would shake and the capstan would tilt toward the pinch roller, deteriorating the tape running characteristics as described above.
The present invention provides a tape recorder that eliminates these drawbacks.

(d) Means for Solving Problems The capstan mounting device of the present invention includes a mounting portion fixed to the chassis, a shaft cylinder portion in which a through hole is formed through which the capstan shaft passes, and a portion located above the mounting portion. a capstan support member configured with a protruding capstan support portion; an auxiliary chassis disposed below the chassis;
The auxiliary shaft is fixed to the chassis, and the bearing is formed with a cylindrical hole into which the lower end of the capstan shaft is inserted and supports the lower end surface of the capstan shaft.

(E) Function The present invention rotatably supports the capstan shaft by the shaft cylinder portion and bearing of the capstan support member, and also prevents the pincher of the capstan shaft by the capstan support portion provided on the capstan support member. supports the opposite side of the part to be crimped.

(F) Embodiment The drawing is a sectional view showing an embodiment of the present invention.
In the figure, 1 is a chassis in which a reel shaft drive mechanism and the like constituting the tape recorder are incorporated;
Reference numeral 2 denotes an auxiliary chassis attached to the chassis 1 with a support 3; 4 a bearing fixed to the auxiliary chassis 2; a cylindrical hole is formed in the center thereof; Reference numeral 5 denotes a capstan shaft, and a capstan portion 5a disposed above the chassis 1.
The flywheel 6 and gear 7 are attached to rotate together. 8
is a capstan support member, which includes a shaft tube portion 9 in which a through hole is formed, and a mounting portion 10 that extends laterally from the shaft tube portion 9 and is fixed to the chassis 1.
A capstan support portion 11 that projects above the chassis 1 is formed. A pinch roller 12 is rotatably supported by a pinch roller mounting fitting 13, and is configured to be pressed against the capstan portion 5a of the capstan shaft 5 during a reproducing operation.

As described above, the capstan mounting device of the present invention has been constructed. Next, the assembly operation will be explained. First, the flywheel 6 and gear 7 are fitted and attached to the capstan shaft 5. Next, the mounting part 10 formed on the capstan support member 8 is fitted into the hole provided in the chassis 1, and the insert plate 14 fitted to the mounting part 10 is swaged to the chassis 1 with the swage pin 15. The capstan support member 8 is then attached to the chassis 1. Then, by passing the capstan shaft 5 to which the flywheel 6 and gear 7 are attached from below through the through hole of the shaft cylinder part 9 formed in the capstan support member 8, the capstan part 5a is attached to the chassis 1. protrude upwards. Finally, while inserting the lower end of the capstan shaft 5 into the cylindrical hole of the bearing 4 fixed to the auxiliary chassis 2, the auxiliary chassis 2 is attached and fixed to the column 3 with the screw 16. By performing such an operation, the capstan shaft 5 is rotatably attached to the chassis 1.

In the capstan mounting device configured as described above, the rotation of the motor (not shown) is transmitted to the flywheel 6 by the rope 18 suspended in the groove 17 formed in the flywheel 6. It is composed of When a regeneration operation is performed, the rotation of the motor is transmitted to the flywheel 6 via the rope 18, and the capstan shaft 5 is rotationally driven, and the pinch roller 12 is moved to the capstan portion 5a of the capstan shaft 5 via the tape 19.
is crimped. Therefore, the tape 19 is driven at a constant speed by the capstan shaft 5 and the pinch roller 12. The opposite side of the capstan portion 5a to which the pinch roller 12 is pressed is supported by the capstan support portion 11 of the capstan support member 8, so that the capstan shaft 5 is prevented from tilting due to the pressure force of the pinch roller 12. It can be prevented. Furthermore, even if the center of gravity of the flywheel 6 moves by tilting the tape recorder main body, the lower end surface of the capstan shaft 5 is supported by the cylindrical hole formed in the bearing 4, so in this case It is also possible to prevent the capstan shaft 5 from tilting.

(g) Effects of the invention The capstan mounting device of the invention rotatably supports the capstan shaft by the shaft cylindrical portion of the capstan support member and the bearing in which the cylindrical hole is formed. Since the opposite side of the capstan shaft to which the pinch roller is crimped is supported by the capstan support portion, the capstan shaft will not tilt under any circumstances and the tape will run stably. I can do it.

[Brief explanation of the drawing]

The figure is a sectional view of a capstan mounting device for a tape recorder according to the present invention. 1... Chassis, 2... Auxiliary chassis, 4...
bearing, 5...capstan shaft, 5a...capstan, 6...flywheel, 8...capstan support member, 12...pinch roller.

Claims (1)

[Scope of utility model registration request] A tape recorder equipped with a capstan shaft to which a pinch roller is pressed during playback operation to drive a magnetic tape at a constant speed, comprising: a mounting portion fixed to a chassis; a shaft cylinder portion having a through hole through which the capstan shaft passes; a capstan support member formed of a capstan support part projecting upward from the mounting part; an auxiliary chassis disposed below the chassis; and a lower end of the capstan shaft fixed to the auxiliary chassis. the capstan shaft is rotatably supported by the shaft cylinder portion of the capstan support member and the bearing; A capstan mounting device for a tape recorder, characterized in that a capstan support portion provided on the capstan support member supports the opposite side of the portion of the capstan shaft to which the pincher is crimped.