JPH0447829Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] Conventional tape reels for video tape recorders, etc. have a center pivot 1 as shown in Fig. 3.
The lower reel 11 is made of synthetic resin and the upper reel 13 is made of synthetic resin. It is joined and integrated.

In this conventional example, the lower reel center pivot is prevented from being worn out by using a synthetic resin material with excellent wear resistance, such as polyacetal, for the lower reel 11. On the other hand, on the other hand, the fourth
As shown in the figure, for reasons such as cost and dimensional accuracy, the center pivot 14 is separate from the lower reel 11, that is, the lower reel 11 with the hub 12 integrally formed, and the disc-shaped upper reel 13. A device is known that is composed of three members: and a center pivot 14 molded from synthetic resin with high wear resistance. In the tape reel shown in FIG. 4, the lower protrusion 14a of the center pivot 14 having a flange 14b is inserted into the positioning hole 15 of the lower reel 11, and then the upper reel 14 is placed on the upper surface of the lower reel 11. Flange 14 of center pivot 14
b is held down by an upper reel 13, and then the upper reel 13 is fixed to the lower reel 11 by means of ultrasonic welding. Therefore, in this conventional example, the center pivot 14 is fixed by being pinched by the upper and lower reels 11 and 13 at the flange 14b.

However, in such a tape reel in which the center pivot 14 is separate, the center pivot 14 may not align with the positioning hole 15 due to vibrations or the like during assembly.
This has disadvantages in that the center pivot may come off and pop out, or the center pivot may become deviated from the center of the tape reel and the flange of the center pivot may be damaged.

[Problem that the invention attempts to solve]

The problem to be solved by this invention is that it is a three-piece type tape reel with a separate center pivot, which is easy to install, does not have the above-mentioned drawbacks during assembly, and can be reliably positioned in an accurate position. To provide a tape reel for a video tape recorder or the like whose center pivot can be fixed.

[Means for solving problems]

In order to solve the above problems, the tape reel for video tape recorders and the like of the present invention has a pawl at the bottom of the center pivot, and the pawl of the center pivot fits into the top of the hub of the lower reel. By forming a fitting hole, the center pivot is fitted into the fitting hole of the hub of the lower reel and fixed to the upper and lower reels.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tape reel for a video tape recorder or the like according to the present invention will be described below with reference to the drawings.

1 and 2 are cross-sectional views of an embodiment of the present invention. FIG. 1 shows the entire tape reel, and FIG. 2 shows an enlarged view of the center pivot mounting portion. In these figures, 1 is a lower reel with a hub 2, 3 is an upper reel, and 4 is a center pivot. This center pivot 4 is a mounting claw 4a.
On the other hand, a fitting hole 5 is formed at the top of the hub 2, and this fitting hole 5 is provided with an undercut portion 5a.

In the tape reel of this embodiment, the claw 4a of the center pivot 4 is inserted into the fitting hole 5 provided in the hub 2 of the lower reel 1, and the center pivot 4 is inserted into the hub 2.
Attach. At this time, the claw 4a of the center pivot 4 engages with the undercut portion 5a of the fitting hole 5, and is held so as not to slip out, so that no displacement occurs. Further, by combining the upper reel 3 and fixing the upper and lower reels 1 and 3 by means such as ultrasonic welding, the upper and lower reels 1 and 3 become integrated. Incidentally, the center pivot 4 may be fixed at its flange 4b by being held between the upper and lower reels 1 and 3. In addition, in this illustrated example, the center pivot 4
Although the undercut portion 5a is provided and engaged with the undercut portion 5a, the pawl 4a is not limited to this, and the pawl 4a is made to protrude from the mounting side end face of the hub 2, and an undercut portion is provided on the pivot 4 side and fitted and fixed. You can do it like this.

[Effect of idea]

In the tape reel for video tape recorders and the like of the present invention, the center pivot is attached with a claw so that it cannot move, so the center pivot does not come off or become misaligned during assembly, so it is easy to assemble. The work becomes convenient and the center pivot can be installed accurately.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the tape reel of the present invention, Fig. 2 is an enlarged sectional view of the center pivot attachment part of the above embodiment, and Figs. 3 and 4 are sectional views of a conventional tape reel. It is a diagram. 1...Lower reel, 2...Hub, 3...Upper reel, 4...Center pivot, 4a...Claw, 5...
...Mating hole.

Claims (1)

[Scope of utility model registration request] A tape reel consisting of a lower reel having a hub, an upper reel, and a center pivot, and a fitting hole having an undercut portion is provided at the top of the hub, and the center pivot has a plurality of attachment claws extending downward. Furthermore, the upper reel is provided with an opening that does not interfere with the center pivot, and the claw of the center pivot is fitted into the fitting hole through the opening, regardless of the installation of the upper reel, and the center pivot is attached to the top of the hub. A tape reel configured to be attached.