JPH0624065Y2 - Tape cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a tape cassette in which upper and lower halves are combined to form a cassette housing.

[Outline of device]

According to the present invention, upper and lower half aligning and positioning means formed by combining cassette housings for storing tapes are arranged so as to regulate the front-rear direction in one of the rear side corners and regulate the left-right lateral direction in the other. With this structure, the upper and lower halves are prevented from being displaced, the assembling accuracy of the tape path portion can be secured, and the appearance is excellent, and the quality of the tape cassette is improved.

[Conventional technology]

Conventionally, as a tape cassette of this type, it has been published as Shoji 61-5657.
As disclosed in Japanese Patent Publication, circular bosses are projected on each of the five screw tightening points on the lower half, and screw holes are formed on each boss, while the upper half has a lower hole. A fitting recess into which each half boss is fitted is formed and a screw insertion hole is formed therethrough.

Then, the upper and lower halves are fitted into the boss and the fitting recess, and in this state, a screw is inserted from the screw insertion hole of the upper half, screwed into the screw lower hole of the lower half and fastened together to form a tape cassette. There is something.

Further, in the tape cassette disclosed in Japanese Utility Model Publication No. 57-44550, circular bosses are provided at five locations on the lower half in the same manner as in the conventional example described above, while the circular boss of the lower half is fitted on the upper half. The fitting concave portion to be fitted is formed, but the fitting concave portion is formed in a U shape in which the peripheral wall on the front surface side is removed.

Then, in the upper and lower halves, with the circular boss and the U-shaped fitting concave portion fitted together, a screw is inserted through the screw insertion hole on the fitting concave portion side, screwed into the tapping hole on the circular boss side, and fastened together. Has been formed.

[Problems to be solved by the device]

In the former of those described in the prior art, in the state where the circular boss of the lower half and the fitting recess of the upper half are fitted together, the upper and lower halves are accurately positioned and united, but the upper and lower halves are Since it is formed by resin molding,
In this molding, it is difficult to obtain dimensional accuracy, so that the screw insertion hole and the screw pilot hole are misaligned, making it impossible to tighten the screw.If the screw hole is forcibly tightened with the screw hole misaligned, There is a problem that one half is lifted up, a step is formed on the side walls of the upper and lower halves, the appearance is deteriorated, and the quality of the tape cassette is deteriorated.

Also, in the latter, the fitting recess of the upper half that receives the circular boss of the lower half is U-shaped with the front side open, and therefore the positioning of the upper and lower halves in the forward direction is insufficient, and as a result, the front side In addition, there is a problem that not only the back side is displaced but the appearance is impaired, but also the front side tape path cannot be formed accurately.

The present invention has been made in view of the problems that the prior art has, and an object of the present invention is to prevent the upper and lower halves from being displaced and to accurately form the tape path portion, and to improve the appearance. It is also an object of the present invention to provide a tape cassette which is excellent in quality and improves the quality by preventing the occurrence of cracks during molding.

[Means for Solving the Problems]

To achieve the above object, the tape cassette according to the present invention is formed at both rear side corners of the upper half, and a positioning boss projectingly provided at both rear side corners of the lower half is brought into contact therewith. A horizontal guide surface on one of the left and right boss receiving parts,
A guide surface in the front-rear direction is formed on the other side, and both guide surfaces are arranged so as to face each other in directions orthogonal to each other.

[Action]

In the tape cassette of the present invention, when the upper and lower halves are combined, one positioning boss at the rear side corners of the lower half is brought into contact with one lateral guide surface of the rear side corners of the upper half. Movement in the front-rear direction is restricted, and the other positioning boss is in contact with the other guide surface in the front-rear direction to restrict lateral movement in the left-right direction. Is regulated to prevent deviation, the tape path portion is accurately formed, and the appearance is excellent.

〔Example〕

Hereinafter, an example of a tape cassette to which the present invention is applied will be described with reference to the drawings.

In the figure, (11) shows the box body of the tape cassette as a whole for housing the magnetic tape, and this cassette box body (11) makes the upper half (11a) and the lower half (11b) face each other, and the five screws (12
a), (12b), (12c), (12d) and (12e) are fastened together to form a magnetic tape T wound around a pair of reels (13a) and (13b). It

An opening (14) is formed on the front side of the cassette housing (11), and guide rollers (15a), (15b) are rotatably arranged at both sides of the front opening (14). This front opening
Between the guide rollers (15a) and (15b) of (14) is formed a tape lotion P of the magnetic tape T, and the magnetic tape T is guided by the guide roller (1
5a) and (15b) are wound and wound around reels (13a) and (13b). The upper and lower surfaces, that is, the upper and lower halves (11a) and (11b), respectively, are connected to reels (13a) and (13b) through reel shaft insertion holes (16a),
(16b) is formed symmetrically.

At each fastening point of this lower half (11b), a positioning boss (17
a), (17b), (18a), (18b), and (19) are projected and screw holes (20) are drilled at the center of each, and the lower half of each upper half (11a) is tightened. Positioning receiving parts (21a), (21b), (22a), (22b), (23) are formed in which the tips of the bosses of the half (11b) are abutted and fitted, and a step is formed at the center of each. A screw insertion hole (24) is provided.

Then, among the fastening parts of the upper half (11a), the receiving portions (22a) and (22b) at both corners on the back side are provided with bosses (1
8a), (18b) at a distance slightly larger than the guide surface (25a)
And (25b) are formed. The guide surface (25a) of the one receiving portion (22a) is formed in the left-right lateral direction, and the other receiving portion (22a) is formed.
The guide surface (25b) of (b) is formed in the front-back direction, and both guide surfaces (25
(a) and (25b) are formed in directions orthogonal to each other to form positioning means.

Upper and lower halves having positioning means configured in this way
Positioning in the combination of (11a) and (11b) is performed by the bosses (18a) and (18b) at the rear side corners of the lower half (11b) and the receiving portions (22a) at the rear side corners of the upper half (11a). , (22b), but at this time, the one boss (18a) abuts the guide surface (25a) at the one receiving portion (22a) to restrict the movement in the front-back direction, and the other. The boss (18b) comes into contact with the guide surface (25b) in the other receiving portion (22b) and its lateral movement is restricted, so that the upper and lower halves (11a) and (11b) are joined together. Displacement, twist, etc. are absorbed and the position is regulated as a whole. In this case, as a premise, it is desirable that the central boss (19) and the receiving portion (23) be a combination of a cylindrical shape and a circular concave portion with less rattle.

With this configuration, the upper and lower halves (11a), (11
The tape cassette with the five screws (12a) to (12e) of b) can be securely tightened, the side wall is not displaced, the appearance is excellent, and the tape path portion P is accurately formed. To be

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various configurations can be adopted without departing from the spirit of the present invention.

For example, as shown in FIG. 5, the guide surfaces of the receiving portions (22a) and (22b) at both corners on the rear side of the upper half (11a) are parallel guide surfaces (25a ₁ ), (25a ₂ ) and (25a ₂ ) respectively. 25b ₁ ), (25b ₂ ), in which case the upper half (11b) bosses (18a) and (18b)
Position regulation of b) can be performed more reliably.

Also, the receiving parts (21a), (21a) at both corners on the front side of the upper half (11a)
The guide surface may be formed in the same manner as in the above-described embodiment in b).

[Effect of device]

As described above, according to the present invention, the positioning of the upper and lower halves forming the cassette housing is performed in the rear side corners of the upper and lower halves, one in the front-rear direction and the other in the left-right lateral direction. The upper and lower halves are prevented from slipping and can be securely fastened together with screws to form the tape path accurately, and there is no step on the side wall surface. Since the position can be regulated at the time of uniting, the precision of the mold for molding the upper and lower halves can be kept relatively low, and the mold can be easily manufactured.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an example of a tape cassette according to the present invention, FIG. 2 is a plan sectional view of an essential part, FIG. 3 is a sectional view of the essential part, and A is a sectional view taken along the line AA of FIG. B is a sectional view taken along the line BB in FIG. 2, FIG. 4 is an external perspective view of the tape cassette, and FIG. 5 is a plan sectional view of a main part of another example. In the figure, (11) is a cassette housing, (11a) is an upper half, (11b) is a lower half, (12a), (12b), (12c), (12d), (12e) are screws, (17
a), (17b), (18a), (18b), (19) are positioning bosses, (21a),
(21b), (22a), (22b), (23) are positioning receiving parts, (25a), (2
5b) is a guide surface.

Claims (1)

[Scope of utility model registration request] 1. A tape cassette in which a cassette housing for accommodating a tape is formed by combining upper and lower halves. The tape cassette is formed at both rear-side corners of the upper half and protrudes at both rear-side corners of the lower half. A lateral guide surface is formed on one of the left and right boss receiving portions with which the positioning bosses provided are abutted, and a guide surface in the front-rear direction is formed on the other, so that both guide surfaces face each other in directions orthogonal to each other. Tape cassettes that are arranged.