JPH0237143Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in the bearing holder and reference pin holder of a tape recorder.

In conventional tape recorders, especially cassette tape recorders, due to the limitations of the cassette tape standards, the distance between the capstan shaft and the reference pin is narrow, making it difficult to secure space for the mounting screws and obtain stable fixation. It was difficult.

A conventional example will be explained with reference to the drawings. FIG. 1 is a sectional view of a main part of a tape recorder. A flywheel bearing 2 caulked to the casing 1, a flywheel shaft 3 rotatably fitted into the bearing 2, a flywheel 4 fixed to the shaft 3, and a rift in the vicinity of the flywheel bearing 2. An Allen pin holder 5 is fixed to the housing 1.

A reference pin 6 is erected on the holder 5.

In such a structure, since the caulking margin to the housing 1 is small, problems tend to occur in the reliability, strength, and accuracy of attachment. Furthermore, as shown in FIG. 3, some devices were attached to the housing 1 with screws, but this had the disadvantage that it was difficult to secure space, especially for cassette tape recorders.

Therefore, the present invention aims to solve the above-mentioned drawbacks.

To explain the present invention according to the drawings, in FIGS. 4 and 5, the flywheel bearing 11 is attached to the collar 1.
2 and the reference pin holder 13 are integrally formed by casting. Here, the flywheel bearing 11 has a substantially cylindrical shape, and has a shaft hole 14 into which a flywheel shaft is inserted. Further, the collar 12 is disc-shaped and has a fixing hole 15 bored around its circumference. The reference pin holder 13 is cylindrical and has a flange 12.
A reference pin hole 17 is provided at the upper end of the reference pin.

Since each of the above components is constructed as one piece, flywheel bearings can be installed in a small space, making them particularly effective in cases where design space is limited, such as in cassette tape recorders. be.

Furthermore, since there is no need to assemble each component separately as in the past, the number of assembly steps can be reduced, and since the positional relationship between the components is fixed, mounting accuracy and strength can be improved.

As another embodiment of the present invention, as shown in FIG. 6, the reference pin 16 itself is cast integrally with the flywheel bearing.

In the case of the above structure, since it is integrally formed, the number of steps for attaching the reference pin can be saved, and there is no fear of loosening due to caulking.

This is particularly beneficial if there are no restrictions on the material of the pin.

Incidentally, examples of the material constituting the present invention include zinc and aluminum.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing a conventional example, Fig. 2 is a plan view of the main part thereof, Fig. 3 is a plan view showing another conventional example, and Fig. 4 is a main part showing the present invention. Plan view,
FIG. 5 is a sectional view thereof, and FIG. 6 is a sectional view showing another embodiment of the present invention. 1... Housing, 2, 11... Flywheel bearing, 3... Flywheel shaft, 4... Flywheel, 5, 13... Reference pin holder,
6, 16... Ref Allen spin, 12... Tsuba, 1
4...Shaft hole, 15...Hole, 17...Pin hole.

Claims (1)

[Scope of utility model registration request] A cylindrical flywheel bearing, a collar, and a reference pin holder are integrally molded by casting, and the flywheel bearing and reference pin holder are screwed to a casing through holes formed in the collar. A tape recorder featuring: