JPS60109085A - Tape cassette - Google Patents

Abstract

PURPOSE:To improve the efficiency of assembly by providing a taper part on the surface opposite to the head insertion side of tape guide pins of a tape cassette. CONSTITUTION:A lower half 20 consists of a shield plate insertion groove 21, bottom surface 22, leaf spring mount parts 23a and 23b, tape guide pins 25 and 26 with taper parts 24a and 24b, and leaf spring support pins 27 and 28. The tape guide pins 25 and 26 provided the leaf spring support pins 27 and 28 successively at both sides of the head insertion part integrally with the lower half 20 have the tape parts 24a and 24b which increase in diameter toward the bottom surface 22 on the surface opposite to the head insertion side.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates primarily to tape cassettes for tape recorders.

Conventional Structure and Problems Cassette-type recording and reproducing devices, such as tape cassettes for tape recorders, tape players, video tape recorders, etc., have a head inserted into the head insertion section to ensure good contact between the head and the magnetic tape. A shield plate is provided facing the head pad.

Now, referring to Fig. 1 as an example of a tape cassette for a tape recorder, the tape cassette has a magnetic tape 6 inside a top half 1 and an upper half 2 made of synthetic resin such as polystyrene. The wound reel 62L, 6b is d
The guide roller 8a is rotatably stored through the guide rollers 1, 3, and 4, which have excellent mechanical properties, and the guide roller insertion pins 7a and 7b are fitted with tape guide rollers 8a.

8b is assembled by inserting the shield plate 10 into the shield plate insertion groove 9 and then placing the leaf spring 19 with the head pad 12 attached on the leaf spring placement part 11. Figure~4th
As shown in the figure, the workability of assembling the shield plate 10 and the head buff 1-12 was poor. To explain this part in more detail, the shield plate 10 is the lower bar) 1
The leaf spring 19 is placed on the leaf spring mounting portion 11 so that it is inserted into the shield plate insertion groove 9 formed integrally with the shield plate 1Q, and the head pad 12 is positioned facing the shield plate 1Q. above shield), 1y,
1-ou is formed in a hollow shape, and has protrusions 15&, 15b on both sides, and these protrusions 15a, 1
5b has a stepped portion 16a on the upper side.

16b, and the stepped portions 17a, j7b and 18a on the lower side.
, 1ab, respectively, and a protrusion 16a.

19 of 15b is also formed so that the leaf spring 19 to which the head pad 12 is attached is still in contact with the protruding portion at the tip. The method of assembling the shield plate 1o and the head panel 12 as described above will be explained with reference to FIG. After that, the leaf spring 19 with the head pad 12 attached is inserted and placed on the leaf spring mounting portion 11 so as to be positioned between the shield plate 1o and the tape guide pins 13 and 14 provided integrally on the lower half 1. In this case, as shown in FIG.
, 15b, it often occurs that the stepped portions 16a and 16b cannot be inserted smoothly during the assembly work, resulting in poor work efficiency.

Aspects of the Invention The present invention aims to eliminate the above-mentioned drawbacks, and provides a tape force center that can easily attach a head pad and insert a spring with a simple structure. It is.

Structure of the Invention To achieve this object, the present invention
In this case, tape guide pins are integrally provided on both sides of the head insertion part of the lower half, and the diameter increases toward the bottom surface of the tape guide pin on the opposite side of the head insertion side. A tapered portion is formed. According to this configuration, the leaf spring can be inserted smoothly.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 6 and 6 show the lower half (this lower bar) 20, which is a feature of the present invention, includes a shield plate insertion groove 21, a bottom surface 22, leaf spring mounting portions 23fL and 23b, and a tapered portion. Tape guide pin 25°261. having 24a and 24b. It consists of a leaf spring support bin 27.2'8. Tape guide pins 2 are integrated with the lower half 2o and are arranged in parallel with leaf spring support bins 27 and 28 on both sides of the head insertion portion.
5.degree. 26 has tapered portions 2za and 24b whose diameter increases toward the bottom surface 22 on the surface opposite to the head insertion side.

Next, the state of assembling the leaf spring 3o having the shield plate 29 and the head panod 31 into the lower no.-720 will be explained based on FIGS. 7A to 7C. First, as shown in FIG. ...-Insert the flat shield plate 29 into the shield plate insertion groove 21 of the frame 2Q. This insertion is carried out smoothly because the shield plate 29 has a flat plate shape.Next,
As shown in FIG. 7B, insert the leaf spring 30 with the head pad 31 removed. This leaf spring 3
0 is inserted between the tape guide pin 26.26 and the leaf spring support pin 27.28, and the tapered portion 24a is inserted into the tape guide pin 25.26.

24b, so it can be inserted smoothly.

Therefore, work efficiency is very good. And finally the seventh
As shown in FIG. C, the head pad mounting portion 23a.

A leaf spring 3o is placed on the heel dopant 31 attached to 23b to improve the adhesion between the tape and the head.

Here, in the above embodiment, a case was explained in which a head pad was attached and a one-fusplinog was inserted between a tape guide pin and a leaf spring support pin. The present invention (d) is also effective when a leaf spring is inserted between the tape guide pin and the tape guide pin.

Effects of the Invention As described above, according to the deep case notebook of the present invention, a tapered portion is provided on the face opposite to the groove insertion side of the tape guide pin. This can improve efficiency.

[Brief explanation of the drawing]

Figure 1 is a molecular W perspective view showing a conventional tape cassette, Figure 2 is a partially cutaway perspective view showing the shield plate and head pad of the tape cassette, and Figure 3 is the same shield plate and head pad. A perspective view, No. 41ZI is a cross-sectional view showing a state in which a leaf spring with a head pad removed is inserted, FIG. The figure is A in Figure 5.
A sectional view taken along the line -A' and FIG. 7A-C is a diagram illustrating the n1 standing state of the shield plate and leaf spring in the tape cassette of the present invention. 2...lower half, 6...magnetic tape, s? L
, 6b--Reel, 20--Lower half, 22 ・
...bottom of lower half, -242L, 24b...taper, 25.26...tape guide pin.

Claims (1)

[Claims] It has a reel wound up with magnetic deso, and a case that rotatably stores this reel and consists of a lower half and a pair of upper and lower lower halves, and tape is placed on both sides of the head insertion part of the lower half. A tape cassette in which a guide bin is integrally provided, and a tapered part whose diameter increases toward the bottom of the lower part is formed on the opposite side of the head insertion side of the guide bin.