JPS5853714Y2 - Tape recorder reel stand device - Google Patents

Description

[Detailed description of the invention] The present invention is a tape recorder reel stand in which the axial movement of the reel stand shaft fixed to the reel stand can be slightly adjusted in a reel stand device in which a reel motor and a reel stand are integrally connected. Regarding equipment.

The reel stand shaft of a conventional tape recorder reel stand device is
- It is rotatably supported by bearings provided above and below a cylindrical portion extending up and down that is integrally provided with the housing, and the reel stand shaft can move slightly in the axial direction.

Further, a disk-shaped bearing plate fixed with a screw is provided at the tip of the cylindrical portion, and the tip of the reel stand shaft is supported at the center of the bearing plate.

However, since the bearing plate is a simple flat disk, there is a drawback that the reel shaft cannot be adjusted up and down with a screw.

The object of the present invention is to eliminate the drawbacks of the conventional tape recorder and provide a reel stand device for a tape recorder that can vertically adjust the reel shaft integrally connected to the reel stand with a simple bearing plate configuration.

The present invention will be explained based on the drawings.

FIG. 1 is a cross-sectional view of a reel stand device for a tape recorder according to the present invention, and FIG. 2 is a bottom view as seen from the direction of the arrow in FIG.

In the figure, 1 is a housing, and in the center of the housing 1 is a cylindrical part 3 that extends upwardly and protrudes and has a hole 2 inside.
Bearings 4a and 4b are fixed in the hole 2 of the cylindrical portion 3 at the top and bottom, respectively, and female threaded portions 5a and 5b are provided on the outer periphery of the lower end of the cylindrical portion 3.

Reference numeral 6 denotes a reel stand shaft whose lower end surface is formed into a spherical shape 7 and passes through the bearings 4a and 4b. Washers 8 and 9 are fitted into the upper and lower ends of the bearings 4a and 4b, respectively, and a retaining ring 10
11 is locked to prevent removal.

A reel stand 13 on which an upper surface mat 12 is provided is fixed to the upper part of the reel stand shaft 6 by press-fitting or the like, and a button is attached to the reel stand 13. The provided cylindrical reel shaft part 14 is integrally formed, and a claw 15 that fits into the engagement groove of the reel is formed on the outer periphery of the reel shaft part 14-1 that extends outward by the reel shaft part 14. has been done.

Further, a disk-shaped bearing plate 16 is provided at the lower end of the cylindrical portion 3 of the housing 1, and is attached to the housing 1 with screws 18a, 18b, 18c, etc.

The bearing plate 16 is provided with at least three arcuate long holes 16-1.16-2.16-3 located on the same circumference.
Stairs A and B are provided on both sides of each elongated hole from one end to the other end, and a screw 18a is provided in the elongated hole.

18b and 18c are inserted to support the spherical tip provided at the tip of the reel stand shaft 6 at the center of the bearing plate 16.

Reference numeral 19 denotes a ring-shaped stator core that is attached by screws 21 to a base part 20 provided in the housing 1 so as to protrude in the same direction as the cylindrical part 3.A stator coil 22 is wound around this stator core 19, and the position of the stator core 19 is fixed. A detection coil 23 is wound around it.

Further, a printed circuit board 26 incorporating a rotation control circuit is attached to the stator core 19 by screws 25 via a collar 24 .

Reference numeral 27 denotes a hat-shaped shield plate which is attached to the lower surface of the reel stand 13 with screws 28 and has a vertical plate portion 27a formed at its outer end.The inner peripheral surface of the vertical plate portion 27a is magnetized in the circumferential direction. A ring-shaped magnet 29 is attached, and the vertical height of this magnet 29 is equal to that of the stator core 1.
The stator core 19 is formed to be larger than the vertical height of the magnet 9, and the stator core 19 is opposed to the lower part of the inner peripheral surface of the magnet 29, thereby forming a motor drive section.

In this way, the vertical height of the magnet 29 is formed to be larger than the vertical height of the stator core 19, and the stator core 19 is arranged so as to be opposite to the lower part of the magnet 29. A force acts to move the magnet 29 upward so that the vertical center positions of the The spherical tip 7 of
is pressed against the upper surface of the center of the bearing plate 16 to prevent the reel stand shaft 6 and the reel stand 13 from wobbling in the thrust direction.

30 is fixed to a protruding cylindrical part 31 provided concentrically outside the reel bearing 14 on the lower surface of the reel stand 13, and faces a part 19a of the stator coil 19 around which the position detection coil 23 is wound. These position detection cores constitute a position detection mechanism.

The present invention has the above-described configuration, and by mounting the reel on the reel stand 13 and energizing the stator coil 22, a rotational force is generated between the stator core 19 and the magnet 29, and the magnet 29 is connected to the shield plate 27 and the reel. Platform 13
At the same time, it rotates with the reel stand shaft 6, and can obtain tape tension force for tape winding or tape supply.

Furthermore, a reel stand shaft 6 integrally configured with the reel stand 13
is rotatably held by a bearing plate 16, and a step portion is provided on the bearing plate 16 along the arc-shaped long hole as a means for biasing the reel stand 13 in the direction of the reel mating axis 6. The relative position of the reel stand 13 with respect to the housing 1 can be adjusted by engaging the housing 1 and the bearing plate 16 with screws 18a, 18b, and 18c, and selecting and moving the screwing positions of the housing 1 and the bearing plate 16. .

According to the invention, screws 18a, 18b. If the bearing plate 16 is rotated with the parts 18c and the like slightly loosened, the height of the reel stand 13 can be easily adjusted even while the reel stand 13 is rotating.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the reel stand device of a tape recorder of the present invention, FIG. 2 is a bottom view seen from the direction of the arrow in FIG. 1, and FIG. 3 is a plan view of the bearing plate 16 of the present invention. Figure 4 shows the third
A sectional view taken along the Al-A2 line in the figure is shown. 1...Housing, 3...Cylinder part, 4a, 4b...
Bearing, 6... Reel stand shaft, T... Spherical tip, 13
... Reel stand, 14... Reel shaft, 16... Bearing plate, 16-1゜16-2, 16-3-... Long hole, 1
8a, 18b. 18c...Screw, A, B...Step part, 19...Stator core, 20...Base part, 22...Stator coil, 27...Shield plate, 29...Magnet.

Claims (1)

[Scope of utility model registration request] The reel stand shaft to which the reel stand is fixed is supported by a vertically extending cylindrical part provided integrally with the no-using, and a disc-shaped bearing plate is installed at the lower end of the cylindrical part provided on the reel stand. In a tape recorder reel stand device that holds the tip of the shaft at the center of the bearing plate, the bearing plate is provided with a plurality of arc-shaped long holes located on at least one same circumference,
A plurality of step portions are provided between the elongated holes facing from one end of the elongated hole to the other end, and a bearing plate is fixed at the corresponding step portion of each elongated hole to adjust the moving distance of the reel stand shaft in the axial direction. Tape recorder reel stand device.