JPH02168482A - Tape cassette - Google Patents

Abstract

PURPOSE:To attain automatic of mount of an elastic plate, to quicken the manufacture and to reduce the manufacture cost by mounting the elastic plate to a cassette half with the loading to a slit simply. CONSTITUTION:Elastic plates 29, 30 are inserted in a slit so that one end being a stationary side having a fit notch 31 is placed between projection stripes 26, 27 provided in the slit of supports 20, 21. Simultaneously, the fit notch 31 is engaged with a stopper 28 provided in the supports 20, 21 to be fixed to the supports 20, 21. Thus, the elastic displacement of the elastic bodies 29, 30 fixed in this way is applied by using one end inserted to the slit as the fixed part.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a tape tape wound between a pair of tape reels rotatably mounted in a cassette half formed by combining an upper half and a lower half. This invention relates to a tape cassette having an elastic plate that comes into contact with a magnetic tape and prevents loosening of the staple.

[Conventional technology]

-m, tape cassettes used in tape recorders and video tape recorders are those cassettes! - There is a slight clearance between the half and the tape reel containing the magnetic tape, and this clearance allows the tape cassette to be removed when the tape cassette is installed in a tape recorder, etc.

The tape reel is set to be interlayered from the inner surface of the upper and lower halves of the tray.

However, in reality, since the tape reel is free to rotate when the tape cassette is not in use, the magnetic tape tends to loosen at the cassette opening window (when installing the tape cassette in a tape recorder, etc., or when setting the tape force). The loosening becomes noticeable due to the vibrations received when handling the cassette.This loosening of the magnetic tape not only causes damage to the magnetic tape in the cassette opening window, but also causes damage to the magnetic tape when opening/closing or attaching the opening window cover. When carrying out the loading operation, various inconveniences occur, such as the magnetic tape being pinched by the opening window cover and being wrapped around the loading means.

In order to solve this problem, a tape cassette as shown in FIG. 10 has been proposed which is designed to prevent the tape wound around the tape reel from loosening.

This tape cassette will be briefly explained in the following sections. In the figure, l is a lower part (i) which is combined with an upper half (not shown) to form a cassette half. On the inner surface of this lower bar 21, as is well known, a pair of A tape reel 2.3 and a guide pin 4.5 are disposed, and a guide roller 7.8 is disposed near the opening window 6 formed at the center of the front side of the lower half l. There is.

The magnetic tape 9 is wound around the tape reels 2 and 3 with both ends thereof fixed to hubs provided on each of the tape reels 2 and 3.

This magnetic tape 9 is guided along the guide pins 4, 5 and guide rollers 7.8, and a portion thereof is exposed to the opening window 6.

Further, on the inner surface of the lower half 1, protruding pieces 10.11 are located near each of the tape reels 2.3. Elastic plates 12 and 13 are attached to prevent the parts 9 from loosening.These elastic plates 12 and 13 are made of sheet-shaped synthetic resin such as Mylar (trade name). The elastic plate 12.13 is configured by providing a contact portion 16.17 for the magnetic tape 9 formed by pasting a synthetic resin sheet such as Teflon (trade name) with a small coefficient of friction. -1- rising piece 10.1 via adhesive tape 18.19 such as double-sided tape affixed to the proximal end opposite to the side where ゜17 is provided.
1 and can be attached to each. That is, as shown in FIG. 10, each of the elastic plates 12.13 contacts the magnetic tape 9 running between the guide pin 4 and the guide roller 7 and between the guide pin 5 and the guide roller 8 at a contact portion 16.1.
7 is attached to the upright piece 10.11 via an adhesive tape 18.19 so as to make pressure contact therewith.

By arranging the elastic plates 12, 13 in the cassette half in this manner, a predetermined pressing force is applied to the magnetic tape 9, thereby achieving prevention of loosening of the magnetic tape 9.

[Problem to be solved by the invention]

But 2. The elastic plates 12.13 of the magnetic tape 9 marked F are attached to the upright pieces 10.11 in the lower half l using adhesive tapes 18.19 as described above. .19 is subjected to various forces and becomes fatigued, and furthermore, due to aging, it becomes fatigued and dry, causing it to peel off easily, causing an accident in which the magnetic tape 9 loses its pressing support function. It ends up.

Furthermore, if the adhesive of the adhesive tape 18.19 leaks out when attaching the elastic plates 12.13 to the upright pieces +o and li, the leaked adhesive may adhere to the magnetic tape 9, causing the magnetic This creates a problem in that stable running of the tape 9 is hindered and smooth recording and reproducing operations are hindered.

Furthermore, as described above, in the case of a structure in which the elastic plate 12.13 is installed simply by pasting it on the upright piece 10.11 using adhesive tape 18.19, the positioning of the elastic plate 12.13 when installing it in the cassette half is This cannot be done accurately, and a stable pressing and supporting effect on the magnetic tape 9 cannot be guaranteed.

Furthermore, it is difficult to automatically assemble the elastic Fi12.13 by pasting with adhesive tape18.19, which not only complicates the manufacturing process but also increases the manufacturing cost of the entire tape cassette. I can't escape it.

Since the sheet-shaped elastic plate made of synthetic resin that constitutes the locking member described above is easily bent or torn, there is a risk of bending or tearing inside the cassette half. It is necessary to arrange it so that it does not receive heavy loads.

Therefore, the present invention has been devised for the purpose of solving the above-mentioned problems, and it is easy to install and prevents the occurrence of loosening of the &i magnetic tape wound inside the cassette half. To provide a tape cassette which can reliably prevent damage to the magnetic tape and magnetic tape loading means caused by loosening of the magnetic tape, and can ensure smooth running of the magnetic tape fed out from the cassette half. This is what I am trying to do.

A further object of the present invention is to provide a tape cassette that can sufficiently protect a fragile elastic plate made of sheet-like synthetic resin that is prone to bending and tearing.

[Means for Solving the Problems] In order to achieve the above-mentioned objects, the present invention includes a pair of tape reels, a magnetic tape wound between these tape reels, one end of which is fixed, and the other end of which the above-mentioned magnetic tape is fixed. A cassette half consisting of an upper half and a lower half in which a sheet-like elastic plate having a contact portion that contacts the 611 tape is housed, is provided with a fitting notch having an arc-shaped portion, and a holding portion having a slit portion that is integrally planted with the lower half is formed on the inner surface of the lower half, and the slit portion has the above-mentioned elastic A protruding stopper portion is provided to fit into the fitting notch for preventing horizontal movement of the plate, and the elastic plate is inserted into the slit from above the lower half to close the fitting notch. One end of the elastic plate is fixed in the holding part by engaging the notch with the stopper part.

(Function) In the present invention, the J-type elastic plate is inserted into the slit portion of the holding portion provided in the cassette half and held and fixed. At this time, the fitting notch having an arc-shaped portion provided at the lower edge of the fixed end engages with the stopper portion in the slit portion, and the elastic plate is fixed in the holding portion.

Further, the magnetic tape housed in the cassette half is pressed and supported by the elastic plate via the contact portion on the front end side facing the fixed end.

[Actual hili example]

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the main parts of a tape cassette according to an embodiment of the present invention, and is a plan view showing the inside of the lower half of the cassette half, excluding the upper half.

Note that the tape cassette shown in FIG. 1 has the same basic configuration as that shown in FIG.
Identical parts are given the same reference numerals and detailed explanations will be omitted.

In this tape cassette, a holding portion 20.21 for holding an elastic plate 29.30 is integrally planted on the inner surface side of the lower half 1 constituting the cassette half. These holding parts 20
．． Reference numeral 21 denotes a tape reel 2 which is formed to have a U-shaped cross section so that a slit portion 51 is formed in the longitudinal direction, and is rotatably housed in a cassette half.
, 3. These holding parts 20.21
have symmetrical shapes, one of which will be explained in detail with reference to FIGS. 2 and 3. In other words, the holding section 20
．． 21 is the front plate 22.21 so as to form a slit portion 51. Rear plate 23. Consisting of a bottom plate 24 and a side plate 25, the front plate 22
Slits 5 are provided near the opening on one side of the inner surface and in the center of the inner surface of the rear plate 23 so that the protrusions 26 and 27 alternate with each other.
They are each provided so as to bulge out to the first side. Also,
In the vicinity of the one-side plate 25 on the bottom plate 24, there is an elastic plate 2 that is partially inserted into the slit portion 51 as will be described later.
A stopper portion 28 is provided to prevent the cassette half from moving in the horizontal direction, that is, in the planar direction.

On the other hand, the elastic plate 29.30 inserted and fixed into the slit portion 5I of the holding portion 20.21 is formed of a sheet-shaped synthetic resin such as Mylar (trade name) like the elastic plate. It is what it is. These elastic plates 29.
As shown in FIGS. 4 and 5, 30 is made of synthetic resin in the form of a sheet and is formed into a long length having a width approximately equal to the height inside the cassette half. A notch 31 for fitting into the stopper portion 28 having an arcuate portion 31a is provided at the lower edge of one end serving as the fixed end. Since this fitting notch 31 is to be relatively fitted with the stopper part 2B, its size is determined to suit the height etc. of this stopper part 28, but at least on the inner peripheral surface side. It is formed so as to have a continuous arcuate portion 31a, which is a curved surface having no acute corner.

Note that the stopper portion 28 is also desirably shaped to correspond to the fitting notch 31 in order to ensure stable attachment of the elastic plates 29, 30 to the holding portion 20.21.
Therefore, it is desirable that the tip has an arcuate surface corresponding to the arcuate portion 31a of the fitting notch 3I.

Then, a magnetic tape 9 formed by pasting a synthetic resin sheet such as Teflon (trade name) with a small coefficient of friction is attached to the tip of the other end opposite to the one end that is the fixed end of the elastic plate 29,30. A contact portion 33 is provided. The contact portion 33 is formed by covering the distal end side of the elastic plate 29.30 with the synthetic resin sheet to prevent a part of the elastic plate 29.30 from directly contacting the magnetic tape 9. is being done. In this way, the contact portion 33 made of a synthetic resin sheet such as Teflon (trade name) with a small coefficient of friction allows good sliding on the magnetic tape 9, and prevents static electricity from building up on the magnetic tape 9 that slides here. Become.

The elastic plate 29.30 configured as described above has one end, which is the fixed side, having the fitting notch 31, as shown in FIG. The slit 5 is inserted between the strips 26 and 27.
1 and is fixed to the holding part 20.21 by engaging the fitting notch 31 with the stopper part 28 provided in the holding part 20.21. 1. The elastic plate 29.30 is securely fixed at one end within the holding portion 20.21, and is prevented from moving in the horizontal direction in the direction of the arrow in FIG. 6. The elastic plates 29, 30 attached in this manner can be elastically displaced as shown by the dashed line in FIG. 6, with one end inserted into the slit portion 51 serving as a fixed end. Due to this elastic displacement, the magnetic tape 9 comes into relative sliding contact with the contact portion 33 at the tip.
By imparting appropriate elasticity to the magnetic tape 9, the surface of the magnetic tape 9 can be pressed.

Next, FIGS. 7 and 8 show other examples of the above-mentioned holding part 20.21, in which the upper side and the left side in the figure are open, and the elastic plate 29. An arcuate slit portion 52 for inserting the slit 30 is formed, and a stopper portion 28 is provided protruding from the bottom upper surface of the slit portion 52 .

The elastic plate 29.30 is inserted from above into the holding portion 20.21 formed in this way, as in the example described above, and its fitting notch 31 is engaged with the stopper portion 28. Accordingly, the elastic plate 29.30 is attached to the holding portion 20.
One end is fixed in the slit portion 52 of 21 and attached as shown in FIG. Even with the elastic plates 29 and 30 attached in this manner, the other end side where the contact portion 33 is provided is elastically displaced as shown by the dotted chain line in FIG. can be brought into contact with the magnetic tape 9 with appropriate pressure. Therefore, the magnetic tape 9 is prevented from flowing out or loosening unnecessarily.

[Effects of the Invention] As described above, the present invention can be applied to
Since no adhesive is used to attach the elastic plate into the cassette half, all the problems associated with using adhesive can be solved. Since the elastic plate is attached to the cassette half simply by inserting it into the slit, automation of the attachment of the elastic plate to the container can be achieved.
It becomes possible to speed up manufacturing and reduce manufacturing costs.

In particular, in the tape cassette according to the present invention, the fitting notch provided in the elastic plate that fits into the stopper part provided on the slit part side is formed with an arc-shaped part, so that the fitting notch is made of Mylar. It is possible to reduce the risk of damage to elastic plates made of synthetic resin such as.

That is, the elastic plate is a sheet-shaped pole (made of a thin synthetic resin material) such as Mylar.
The contact portion at the tip of this elastic plate is always in contact with the magnetic tape and is elastically displaced, so that minute vibrations generated as the magnetic tape runs are transmitted to the fixed end side to the holding portion. Therefore, there is a possibility that the above-mentioned fitting notch part may be torn due to long-term use, but since this fitting notch part is formed with an arcuate part without having an acute corner, the above-mentioned small There are no parts where the load due to vibration is concentrated, and the probability of damage is reduced accordingly.

Therefore, according to the present invention, it is possible to reliably prevent the magnetic tape from flowing out or loosening more than necessary for a long period of time.
A highly reliable tape cassette can be produced.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the lower half of the tape cassette according to the present invention. FIG. 2 is a plan view of the holding section configured in the lower half, FIG. 3 is a partially cutaway sectional view thereof, and FIG. 4 is a front view of the elastic plate held by the holding section. , FIG. 5 is a plan view thereof, and FIG. 6 is a plan view showing how the elastic plate is attached to the holding portion. Fig. 7 is a plan view showing another example of the holding member, Fig. 8 is a partially cutaway sectional view thereof, and Fig. 9 is a plan view showing the state in which the elastic plate is attached to the holding part. be. FIG. 1θ is a plan view of the lower half of a conventional tape cassette. ... Lower half ... Magnetic tape 0.21 ... Holding part 8 ... Stopper part 9.30 ... Elastic plate 1 ... Fitting notch 1a ... Arc-shaped part 3 ... Contact part I, 52...Slit part Fig. 1 Fig. 2

Claims (1)

[Scope of Claims] A pair of tape reels, a magnetic tape wound between these tape reels, and a sheet-like elastic plate having one end fixed and a contact portion contacting the magnetic tape formed at the other end. a cassette half consisting of an upper and a lower half in which is housed, a fitting notch having an arcuate portion is provided at the lower edge of the fixed end side of the sheet-like elastic plate, and the inner surface of the lower half is provided with a fitting notch having an arc-shaped portion; A holding part having a slit part is formed integrally with the lower half, and the slit part is designed to fit into the fitting notch for preventing horizontal movement of the elastic plate. A protruding stopper portion is provided, and the elastic plate is inserted into the slit portion from above the lower half, and the engagement of the fitting notch with the stopper portion causes one end of the elastic plate to be attached to the holding portion. A tape cassette that is fixed inside.