JPH04119576A - Tape cassette - Google Patents

Abstract

PURPOSE:To obtain the tape cassette with high handleability by setting the depth of a groove, which is formed in the lengthwise direction of a central part, to 0.2-0.4mm. CONSTITUTION:Plural grooves 5a and 5b having the entire almost projecting shape from the rear edge part to the front side of an upper half 1a are formed along the lengthwise direction of a tape cassette A on the upper face of the upper half 1a. The depth of the grooves 5a and 5b is set to 0.2-0.4mm. Therefore, since the groove 5a formed on the upper half 1a of the tape cassette A has an enough slip stopping function, a thumb is sufficiently hung on the part of the groove 5a, and force can be applied so as to press the tape cassette A. Thus, workability clamping the tape cassette A is improved.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a tape cassette.

[Background of the invention]

The general structure of a video tape cassette is that a supply reel and a take-up reel are arranged in the lower half of the case body, and a gap between the supply reel and the take-up reel is provided. After stretching the tape on the designated tape path and arranging various other parts, assemble the rotary opening/closing front cover, align the upper half that makes up the case body with the lower half, and then remove the upper half. and the lower half are integrated with screws. When such a tape cassette is held by the rear end and inserted into the loading slot of a recording/playback device, each mechanism of the recording/playback device operates, the front cover is opened, the magnetic tape is fed out, and recording/playback begins. be exposed. By the way, when inserting such a tape cassette into the loading port of a recording/reproducing apparatus, it is often felt that the handling of the tape cassette is inconvenient.

[Disclosure of the invention]

As the inventor of the present invention diligently investigated the above-mentioned problem, he realized that the problem was that the groove formed in the upper half of the tape cassette did not function as a slipper. . That is, in the tape cassettes that have been provided so far, although a groove of considerable depth is formed on the lower surface of the lower half, the depth of the groove formed on the upper surface of the upper half is shallow. The shallow depth of the grooves used in the past did not provide enough anti-slip functionality when held in the hand. In other words, there are usually three fingers that will hold the lower half side, the large finger, middle finger, and ring finger, and the three fingers that will hold the lower half side are the large finger, middle finger, and ring finger. Since the weight of the tape cassette is added and supported, it is relatively stable, but the finger that will hold the upper half side is only one thumb, and this thumb is used to hold the tape cassette. You have to apply force to hold it down, and since this press is at the end of the tape cassette, unless a large anti-slip mechanism is formed on the upper half side,
In practice, it has proven to be of no use. The present invention was achieved as a result of further intensive research from this viewpoint, and an object of the present invention is to provide a tape cassette with excellent handling properties. The object of the present invention is to
A tape cassette in which a longitudinal groove is formed at least in the center in a range of 24 mm to 24 mm, and the groove is configured to have a depth of 0.2 to 0.4 mm. This is accomplished by using a tape cassette. In addition, in the above tape cassette, the groove interval is 2 mm.
It is preferably 2.0 to 4 or more, more preferably 2.0 to 4.
．． 0 mm, more preferably 2.4 to 3.
Preferably, the width is 5 mm, and the width of the groove is 0.5 mm.
or more, more preferably 0.7 to 1
．． The length of the groove in the longitudinal direction is preferably 1/3 or more, more preferably 40% or more of the length of the tape cassette in the longitudinal direction.

【Example】

1 and 2 show a first tape cassette according to the present invention.
1 is a plan view, and FIG. 2 is an enlarged sectional view taken along the line 1--2 in FIG. 1. In each figure, A is a so-called V with a longitudinal length a of 188 mm, a transverse length b of 104 mm, and a height C of 25 mm.
This tape cassette is said to be an HS type, and the case body of this tape cassette A is composed of an upper half 1a and a lower half 1b, and a front cover 2 that can be opened and closed by rotation is attached to the case body. is installed. A supply reel and a take-up reel are rotatably arranged in this tape cassette A, and the magnetic tape is placed on a predetermined tape bus between the supply reel and the take-up reel. It is stretched. In addition, there is also a reel lock mechanism for preventing rotation of the supply reel and take-up reel, a front cover lock mechanism for preventing the front cover 2 from opening, a light source entry hole for tape end detection, and a tape guide. A guide bin, transparent windows 3a, 3b, a recess 4 for attaching a label, etc. are provided. Incidentally, since these points are well known, detailed explanation will be omitted. The entire upper half 1a has a substantially convex shape from the rear end to the front side (dimensions d is 188 mm, e is 100 mm, r is 80 mm)
, g is 19 mm x h is 10 mm), and a plurality of grooves 5a and 5b are formed along the longitudinal direction of the tape cassette A on the upper surface of the upper half la (the thickness of the upper surface of the upper half 1a is 2 mm). There is. The grooves 5a have a substantially square cross section, and the interval (pitch, distance from the center or deepest part of the groove to the center or deepest part of the adjacent groove) i is 2.
4 mm, the width j of the groove 5a is 0°8 mm, and the depth k of the groove 5a is O-3 mm. - The groove 5b at the end (front side) has a depth of 0.3 m.
Although they are the same, the groove width is about 1.7 mm, and the groove shape is somewhat different from the shape of the groove 5a. Although not shown, the same groove as before is also formed on the rear end side of the lower surface of the lower half Ib side. This groove may be formed along both the longitudinal direction and the transverse direction of the tape cassette A as before, or it may be formed only along the longitudinal direction of the tape cassette A like the groove 5a. You can leave it there. In addition, the region R1 on the front end side and the region R2 on the rear end side where the groove 5a is not formed on the upper surface of the upper half la is textured with a center line average roughness of about 25 μm, and the groove 5a The center line average roughness is 1011 in the area R3 on the rear end side where the 3D is formed, the concave part 4 for attaching the label, etc.
It has a textured texture of about m. When inserting the tape cassette A configured as described above from the loading port of the recording/reproducing device while holding the rear end of the tape cassette A, the finger that will hold the bottom surface of the lower half lb side will be For example, there are three fingers, the large finger, middle finger, and ring finger, and the weight of the tape cassette A is applied to the three large finger, middle finger, and ring finger, which will hold the bottom surface of the lower half lb side, so the tape cassette A is stable. Although the finger that holds the upper surface of the upper half la side is the thumb, the groove 5a formed in the upper half 1a of the tape cassette A has a sufficient anti-slip function. Because of this structure, the thumb is sufficiently caught in the groove 5a and can apply force to press down the tape cassette A, making it easy to work while gripping the tape cassette A. Furthermore, since the depths of the grooves 5a and 5b are not made deeper than necessary, the tape cassette A has sufficient strength and there is no fear of damage. 3 and 4 are plan views showing a second embodiment and a third embodiment of the tape cassette according to the present invention. In these embodiments, the basic technical idea is the same as that of the above embodiments, and the only difference is the overall shape of the grooves 5a and 5b formed on the upper surface of the upper half 1a.
In other words, the only difference is whether or not grooves are formed in the left and right peripheral portions in the longitudinal direction of the tape cassette A, and a detailed explanation thereof will be omitted.

【effect】

The tape cassette according to the present invention is a tape cassette in which a longitudinal groove is formed at least in the center of the upper surface within a range of 15 to 24 mm from the rear end side, and this groove has a depth of 0.5 mm. Since the length of the tape cassette is 2 to 0.4 mm, when holding the rear end of the tape cassette and inserting it into the loading port of the recording/reproducing device, the finger that will be holding the bottom surface of the tape cassette should be, for example, the index finger. There are three fingers, the middle finger and the ring finger, and the weight of the tape cassette is added to these three big fingers, the middle finger, and the ring finger, so it is stable. Although the finger is one thumb, the groove formed on the top surface of the tape cassette is 15 to 24 mm from the rear end side.
over a range of 0.2 to 0.4 mm and a depth of 0.2 to 0.4 mm
mm, it has a sufficient anti-slip function, and the thumb can be sufficiently caught in the groove to apply force to hold down the tape cassette, making it easy to work while gripping the tape cassette. , and because the depth of the groove is not deeper than necessary, the tape cassette is strong enough.
It has the advantage that there is no risk of damage.

[Brief explanation of drawings]

1 and 2 show a first tape cassette according to the present invention.
Fig. 1 is a plan view, Fig. 2 is an enlarged sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 and Fig. 4 show examples.
The figures show a second embodiment and a third embodiment of the tape cassette according to the present invention.
FIG. 2 is a plan view showing an example. A... Tape cassette, 1a... Upper half, 1b.
...Lower half, 2...Front lid, 5a, 5b...Groove.

Claims (4)

[Claims] (1) A tape cassette in which a longitudinal groove is formed at least in the center of the upper surface within a range of 15 to 24 mm from the rear end side, and this groove has a depth of 0.2 mm.
A tape cassette characterized in that it is configured to have a thickness of 0.4 mm. (2) In the tape cassette according to claim 1, the groove interval is 2 mm or more. (3) The tape cassette according to claim 1, wherein the width of the groove is 0.5 mm or more. (4) In the tape cassette according to claim 1, the length of the groove in the longitudinal direction is 1/3 or more of the length of the tape cassette in the longitudinal direction.