JPH0445182Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape cassette suitable for use in recording digital signals, such as PCM signals.

BACKGROUND TECHNOLOGY AND PROBLEMS Currently, a PCM recording and reproducing apparatus has been proposed that converts an analog signal such as an acoustic signal into a digital signal, such as a PCM signal, and records (or reproduces) the converted signal on a magnetic tape. Some PCM recording and reproducing apparatuses use a rotating head to achieve a relatively high recording density. Using this rotating head
In a PCM recording/reproducing apparatus, during recording or reproduction, a magnetic tape is pulled out from a tape cassette and loaded onto a rotating drum provided with a rotating head, and then recording or reproduction is performed.

By the way, in the tape cassette into which this magnetic tape is loaded, if a finger touches the magnetic tape and oil or fat or dust gets on it, drop-out occurs in the playback signal. It is necessary to seal the magnetic tape as tightly as possible to prevent this. Also, a space is required for inserting a guide so that the magnetic tape can be pulled out from the tape cassette during recording or reproduction.

For this reason, a tape cassette as shown in FIGS. 1 and 2 has been proposed. That is, in FIGS. 1 and 2, reference numeral 1 indicates a cassette case body, and this cassette case body 1 is composed of a pair of upper half 2 and lower half 3 that are joined together by screws. 2a
is a transparent window plate provided on the upper surface of the upper half 2. Reference numerals 4a and 4b denote a pair of reel hubs that are housed in the cassette case 1 and rotatably fitted loosely into a pair of reel shaft insertion holes 5a and 5b provided at predetermined positions in the lower half 3; A magnetic tape 6 is wound around 4a and 4b.
Reference numerals 7a and 7b are tape guide columns provided near the left and right side walls facing the front surface, respectively, and the magnetic tape 6 is wound around these tape guide columns 7a and 7b to maintain a predetermined position on the front surface. It is made runnable. Reference numeral 3a denotes a cutout section in which the lower half 3 on the back side of the magnetic tape 6 wound around the tape guide columns 7a and 7b is cut out in a substantially rectangular shape over a predetermined width.
A guide system for pulling out the magnetic tape from the recording/reproducing device is inserted into the inside.

8 indicates arm portions 8a and 8b provided on both left and right sides.
The front cover 8 is pivotally supported so as to be rotatable toward the front side of the cassette case 1, and the front side of the cassette case 1 is opened and closed by the front cover 8.

Reference numeral 9 denotes a substantially U-shaped slider that faces the lower surface and left and right side walls of the lower half 3 and slides in the front-rear direction. Further, 9a and 9b are reel shaft insertion holes that are bored in the slider 9 corresponding to the reel shaft insertion holes 5a and 5b, respectively, when the slider 9 is slid backward to open the notch 3a. . Note that 10a and 10b are positioning holes provided on the lower surface side corresponding to the tape guide columns 7a and 7b, respectively.

When such a tape cassette is not in use, the front part of the cassette case 1 is closed by the front cover 8 as shown in FIG. Then, the positioning holes 10a and 10b are closed by the slider 9, and the magnetic tape 6 is sealed inside the cassette case 1.

Further, during use, as shown in FIG. 2, the slider 9 is slid rearward to open the notch 3a, reel shaft insertion holes 5a, 5b, and positioning holes 10a, 10b, and the front cover 8 is rotated upward. The magnetic tape 6 is exposed on the front surface of the cassette case 1, and the guide system, reel shaft, and positioning pin are inserted into the notch 3a, the reel shaft insertion holes 5a, 5b, and the positioning holes 10a, 10b, respectively. As a result, the magnetic tape 6 is pulled forward from the front surface of the cassette case 1 and loaded onto the rotating drum for predetermined recording or reproduction.

Incidentally, in such a tape cassette, the magnetic tape 6 tends to become loose, and if the magnetic tape 6 becomes loose, the front cover 8 will move from the closed front side of the cassette case 1 to the second position as shown in FIG. As shown in the figure, when the front cover 8 is rotated upward to open the front side of the cassette case 1, the magnetic tape 6 and the edge of the front cover 8 come into contact with each other, causing the magnetic tape 6 to If the magnetic tape 6 is pulled out from inside the cassette case 1 by being scratched or hooked, the magnetic tape 6 becomes large slack, and the magnetic tape 6 cannot be held in a predetermined positional relationship with respect to the guide system. There was a risk that I would not be able to draw out the information. Also, contrary to the above, when the front cover 8 is rotated upward to the state where the front side of the cassette case 1 is closed, the loosened magnetic tape 6 is removed from the front cover 8 and the cassette case 1. There was an inconvenience in that the magnetic tape 6 was pinched between the magnetic tape 6 and the magnetic tape 6, causing creases and scratches.

Therefore, a brake body is provided in the cassette case 1, and this brake body allows the reel hubs 4a, 4b to
3 to 8 have been proposed in which the rotation of the rotor is restricted. That is, in FIG. 3, 2 and 3 indicate an upper half and a lower half, respectively, and these upper half 2 and lower half 3 are made of synthetic resin, such as ABS resin, and a front cover 8, a slider 9 and a Brake body 1 to be described later
1 to obtain a tape cassette.

Here, the lower half 3 will be explained. This lower half 3 is composed of a substantially rectangular flat plate part in which reel shaft insertion holes 5a and 5b are provided, and a frame part consisting of left and right side walls and a back wall part, excluding the front part where the front cover 8 is arranged. . In this case, slider 9
The left and right side walls and bottom surface of the lower half 3 other than the sliding range are made thicker by the plate thickness of the slider 9, and the left and right side walls and lower surface of the lower half 3 corresponding to the sliding range of the slider 9 are A step is provided to prevent a step between the lower half 3 and the slider 9 when the slider 9 is placed on the lower half 3.
Support walls 12 are provided at the front sides of the left and right side walls, respectively, with a step inward by the thickness of the arms 8a and 8b of the front cover 8, and the support walls 12 are provided with a support wall 12 that allows rotation of the front cover 8, which will be described later. A shaft hole for supporting the shaft is formed, and a position where the lower ends of the arms 8a and 8b of the front cover 8 on the back side cover the support wall 12 when the front cover 8 is rotated upward, that is, the support wall 12 is supported. A rectangular operator insertion hole 13 is provided near the lower end of the front side of the wall 12.
In addition, shielding walls 14a, 14b, and 14c are provided on both left and right sides and on the rear side of the notch 3a, respectively, so that the notch 3a
and the inside of the cassette case 1.
Furthermore, lateral grooves 15 parallel to the front-rear direction are provided at the upper ends of the left and right side walls, respectively, and rectangular sliding guide grooves 16 are provided below the lateral grooves 15 corresponding to the sliding range of the slider 9. In this case, the depths of the lateral grooves 15 and the sliding guide grooves 16 are
Make it shallower than the thickness of b.

Further, reference numerals 17a and 17b are collar portions provided annularly around the pair of reel shaft insertion holes 5a and 5b.
18 is a rectangular spring storage section provided parallel to the front and back direction at an intermediate position between the reel shaft insertion holes 5a and 5b;
Reference numeral 19 denotes a spring locking post installed near the front side of this spring storage portion 18. A tension coil spring for biasing a slider 9, which will be described later, is stored in this spring storage portion 18, and one end of this tension coil spring is It is locked to a spring locking post 19.

Next, the upper half 2 will be explained with reference to FIGS. 3 and 4. Like the lower half 3, this upper half 2 has a substantially rectangular flat plate part on which the window plate 2a is arranged, and a frame part consisting of left and right side walls and a rear wall part excluding the front part where the front cover 8 is arranged. It consists of more. In this case, the outer dimensions of the upper half 2 are made approximately equal to the outer dimensions when the slider 9 is arranged on the lower half 3, and there is a step difference between the upper half 2, the lower half 3, and the slider 9 when assembled. prevent this from occurring. Reference numeral 20 denotes a support wall that corresponds to the support wall 12 of the lower half 3 and is provided with a step on the inside of the left and right side walls closer to the front side by the thickness of the arm portions 8a and 8b of the front cover 8, respectively. , the shape of the abutting portion between this support wall 20 and the support wall 12 on the lower half 3 side is complementary. 14d indicates a shielding wall provided corresponding to the shielding wall 14c behind the notch 3a of the lower half 3, and when the upper half 2 and the lower half 3 are combined, the shielding wall 1 on the upper half 2 side
4d and the shielding wall 14c on the lower half 3 side butt against each other, and the notch 3a and the inside of the cassette case 1 are shielded. Reference numerals 21a, 21b, 21c and 21d indicate arcuate flanges provided corresponding to the annular flanges 17a and 17b of the lower half 3, respectively, and the flanges 21a, 21b, 21c and 21d on the upper half 2 side. The reel hubs 4a and 4b around which the magnetic tape 6 is wound are loosely fitted into the flanges 17a and 17b on the lower half 3 side so as to be rotatable. In this case, the collar portion 21a,
The heights of 21b, 21c, and 21d are made approximately equal to the thickness of a portion of the brake body 11 along this upper half 2, which will be described later, so that the brake body 11 has a height of 21b, 21c, and 21d.
21b, 21c, and 21d so as not to adversely affect the magnetic tape 6 wound around the reel hubs 4a, 4b. Reference numerals 22a and 22b indicate hook-shaped brake body support pieces that are vertically disposed diagonally rearward of the side end of the shielding wall 14d and near the left and right side walls, and these brake body support pieces 22a,
A sliding guide hole of the brake body 11, which will be described later, is fitted into the brake body 22b. 23 is the spring locking post 19 of the lower half 3
This is a U-shaped fixing boss provided correspondingly to the U-shaped fixing boss, and when the upper half 2 and the lower half 3 are combined, the spring locking post 19 is located within the opening of this fixing boss 23.
One end of a tension heel spring, which will be described later and which is locked to the spring locking column 19, is fixed at the end of the fixing boss 23. In addition, 24 is a non-slip uneven part provided on the back side of the left and right side walls, and 25 is a substantially V-shaped support recess provided in the approximate center of each side wall. When loaded into a recording/reproducing apparatus, this support recess 25 is held by support claws from both left and right directions.

Furthermore, the brake body 11 will be explained here. This brake body 11 is connected to a sliding guide plate 11a along the inner surface of the upper half 2, and an L-shaped arm 11 hanging below both left and right ends of this sliding guide plate 11a.
b and 11c. In this case, the reel hubs 4a and 4b are provided on the back side of the sliding guide plate 11a.
Brake pawls 11d and 11e are provided corresponding to each of the brake pawls 11d and 11e, respectively. In addition, these brake claws 11d, 11e
Correspondingly, ratchet wheels 26a and 26b are provided on the outer periphery of the upper half 2 side of the reel hubs 4a and 4b.

In addition, a spring support column 1 is provided at the center of the sliding guide plate 11a.
1f, and a pair of spring supports located on both sides of this spring receiving plate 11g and spaced apart from each other by the height of the coil portion of the spring, which will be described later. Brake body support pieces 22a, 22 of the upper half 2 are provided with pieces 11h and 11i.
Corresponding to b, rectangular sliding guide holes 11j and 11k are provided near both left and right ends of the sliding guide plate 11a, and operators 11 are provided at the ends of the arms 11b and 11c.
1 and 11m, respectively. In this case, the coil portion 27a of the spring 27 for biasing the brake body 11 is fitted into the spring support column 11f, and the one arm portion and the other arm portion of the spring 27 are connected to the spring receiving plate 11g and the pair of spring pressing pieces 11h. 11i, so that one arm portion and the other arm portion of this spring 27 press against the shielding wall 14d of the upper half 2, and the biasing force of this spring 27 causes the brake claws 11d and 11e to move between the reel hubs 4a and 11i.
The reel hubs 4a and 4b are caught in the ratchet wheels 26a and 26b of the reel hubs 4b and locked so that they cannot rotate. Further, when the brake body 11 is placed in the cassette case 1, the ends of the operating elements 11l and 11m project to the outside of the support wall 12 by a predetermined amount through the operating element insertion holes 13 of the lower half 3. When the front cover 8 is rotated upward, this protruding operator 1
1l and 11m are pressed by the ends of the arm parts 8a and 8b of the front cover 8, and the brake body 11 is pressed by the spring 27.
The brake pawl 1 is slid forward against the biasing force of the brake pawl 1.
1d and 11e are pawl wheels 2 of reel hubs 4a and 4b
6a, 26b so that the reel hubs 4a, 4b can rotate.

Further, the front cover 8 will be explained here. The front cover 8 is constructed in a substantially U-shape from a plate portion 8c for closing the front surface of the cassette case 1, and arm portions 8a and 8b provided at both left and right ends of the plate portion 8c so as to face each other. do. In this case, when the front cover 8 is rotated to the position where the front part is closed, the arms 8a and 8b of the front cover 8 cover the left and right support walls 12 of the upper half 2, and the front cover 8 is rotated in this rotation. When in the moving position, the slider 9 can be positioned below the arm parts 8a, 8b. Also, this arm part 8
A rotation shaft 8d is provided at a substantially central position inside of a and 8b. 8e and 8f are notches 3a of the lower half 3, respectively.
This is a U-shaped cut-out portion in the plate portion 8c corresponding to both left and right sides of the plate portion 8c.

Furthermore, the slider 9 will be explained here. The slider 9 is connected to a flat plate part 9c along the lower surface of the lower half 3, and side plate parts 9d and 9e located on both left and right sides of the flat plate part 9c and along the left and right side walls of the lower half 3.
It is made of metal, such as stainless steel, and has a substantially U-shape when viewed from the front and rear directions. Reference numerals 9f and 9g indicate bent portions obtained by bending the upper ends of the side plate portions 9d and 9e into hook shapes, respectively. Located in In addition, a convergent portion 28 protruding toward the cassette case 1 side is provided at a predetermined position on the left and right side plate portions 9d, 9e corresponding to the sliding guide groove 16 of the lower half 3. The cassette case 1 side of this constricted part 28 is formed into a smooth curved surface so that the contact angle with the sliding guide groove 16 is an obtuse angle, and the top part of this constricted part 28 and the bottom part of the sliding guide groove 16 The slider 9 is positioned in the left-right direction of the cassette casing 1 by contact with the cassette cassette 1 of the slider 9, and the cassette casing of the slider 9 is positioned by the contact between the upper and lower sides of the top of the constricted portion 28 and the side surfaces of the sliding guide groove 16. 1 in the vertical direction.

9h is a spring locking piece provided corresponding to the spring storage portion 18 of the lower half 3; 29 is a tension coil spring for biasing the slider 9; one end of this tension coil spring 29 is connected to the spring locking post 19 of the lower half 3; By locking the spring locking piece 9h and locking the other end of the spring locking piece 9h, the slider 9 is urged forward to close the notch 3a. Reference numerals 9i and 9j are contact pieces that are vertically provided at the front end of the flat plate portion 9c, corresponding to the cut-out portions 8e and 8f of the front cover 8, respectively. Others are shown in Figures 1 and 2.
The structure is similar to the tape cassette shown in the figure.

The operation of the tape cassette constructed in this way will be explained with reference to FIGS. 5 to 8.

First, when not in use, the front part of the cassette case 1 is closed by the front cover 8 as shown in FIGS. 5 and 6, and the slider 9 biased forward by the tension coil spring 28 closes the notch 3a and the reel Shaft insertion holes 5a, 5b and positioning holes 10a, 10b
is closed, and the magnetic tape 9 is sealed inside the cassette case 1. At this time, the brake body 11 is
7, the brake pawls 11d and 11e engage the ratchet wheels 26a and 26b of the reel hubs 4a and 4b, thereby locking the reel hubs 4a and 4b so that they cannot rotate. Furthermore, the side plate parts 9d and 9e of the slider 9 are located below the arm parts 8a and 8b of the front cover 8, and the upper end surfaces of the side plate parts 9d and 9e of the slider 9 and the front cover 8
The lower end surfaces of the arm portions 8a and 8b abut against each other,
Even if the front cover 8 attempts to rotate, it is locked so that it cannot be rotated, and the front cover 9 is prevented from inadvertently rotating when not in use. Therefore, when not in use, the front cover 8
It is possible to prevent the magnetic tape 6 from being accidentally rotated and exposing the magnetic tape 6 on the front surface of the cassette case 1, thereby preventing fingers or the like from touching the magnetic tape 6.

Next, when in use, the tape cassette is loaded into the recording/reproducing apparatus. That is, when inserting a tape cassette into the recording/reproducing apparatus, the fixing claws on the recording/reproducing apparatus side abut against the contact pieces 9i, 9j of the slider 9 via the cutouts 8e, 8f of the front cover 8, and in this state, the tape is further inserted. When the cassette is inserted into the recording/reproducing device to a predetermined position, the tension coil spring 2 is fixed with the slider 9 fixed by the fixing claw.
The cassette case 1 side is moved against the biasing force of the slider 9, and the slider 9 is slid rearward relative to the cassette case 1. By sliding the slider 9 backward in this manner, the notch 3a, the positioning holes 10a, 10b, and the reel shaft insertion holes 5a, 5b are opened. Then, from this state, the front cover 8 is rotated upward by the cover rotating member of the recording/reproducing apparatus to the state shown in FIGS. 7 and 8. In this case, when the front cover 8 is rotated upward, the lower ends of the arms 8a and 8b push the operators 11l and 11m of the brake body 11 forward, and the brake body 11 resists the biasing force of the spring 27. Then, it is slid forward, that is, toward the shielding wall 14c. At this time, the brake pawls 11d and 11e of the brake body 11 and the reel hub 4
The engagement of the ratchet wheels 26a, 26b of the reel hubs 4a, 4b is released, allowing the reel hubs 4a, 4b to rotate.

In such a state, the positioning holes 10a, 10
A positioning pin and a reel shaft are inserted into the reel shaft insertion holes 5a and 5b, respectively, and the magnetic tape 6 is exposed on the front surface of the cassette case 1. A guide system is inserted into the notch 3a, and the guide system is inserted into the notch 3a. The magnetic tape 6 is loaded by the system, and predetermined recording or reproduction is performed.

In addition, as described above, when the operation is performed from the time of non-use to the time of use, and when the operation is performed from the time of use to the time of non-use, the operation opposite to that described above is performed.

With such a tape cassette, the rotation of the reel hubs 4a, 4b can be restricted by the sliding of the brake body 11 as the front cover 8 rotates, and the magnetic tape 6 can be prevented from becoming unnecessarily slack. Inconveniences caused by looseness can be eliminated. In addition, since the brake mechanism can be constructed by simply providing separately the brake body 11 that regulates the rotation of the reel hubs 4a and 4b and the spring 27 located on the side of the reel hubs 4a and 4b, the number of parts is relatively small. There is an advantage that the number of assembly steps can be reduced.

On the other hand, when assembling such a tape cassette, as shown in FIG. 9, the coil portion 27a of the spring 27 is aligned with the spring support column 11f, and the one arm portion and the other arm portion of the spring 27 are pinched together. Once the spring press pieces 11h and 11i are brought close together and dropped, the coil portion 27 of the spring 27 is
a into the spring support column 11f, and the spring receiving plate 11
After positioning the spring 27 on the brake body 11, the spring 27 is positioned between the spring receiving plate 11g and the pair of spring push pieces 11h and 11i with one arm part and the other arm part of the spring 27 free. The spring 27 is attached so that it will not come off. Therefore, the brake body 11 and the spring 27 can be handled as one unit, making it easy to handle.

On the other hand, in the attachment of the brake body 11 and the spring 27, when the brake body 11 slides, the spring 2
One arm and the other arm of 7 are free so that they can be elastically deformed. For this reason, the brake body 11
When the spring 27 is attached to the brake body 11 as shown in FIG. When attaching the brake body 11 to the upper half 2 by engaging the sliding guide holes 11j and 11k, the spring 2
There was a problem in that one arm part and the other arm part of 7 came into contact with the end part of the shielding wall 14d, making it difficult to attach.

Purpose of the invention In view of the above, an object of the present invention is to obtain a device having a simple structure and easy to assemble.

Summary of the invention The present invention provides a tape cassette that includes a reel hub around which tape is wound inside the cassette case, a brake body that restricts the rotation of the reel hub, and a spring that biases the brake body toward the reel hub.
A spring support column and a pair of spring pushing walls are provided at predetermined positions on the plate part of the brake body, and a slip-off prevention claw is provided on the plate side of the pair of spring pushing walls, and the coil part of the spring is fitted into the spring support column. At the same time, one end and the other end of the spring are respectively located between the spring pushing wall and the plate part, and the one end and the other end of the spring are prevented from coming off from between the spring pushing wall and the plate part by a slip-off prevention claw. The tape cassette of the present invention has the advantage of being simple in construction and easy to assemble.

Embodiment Hereinafter, an embodiment of the tape cassette of the present invention will be described with reference to FIGS. 11 to 14. In FIGS. 11 to 14, parts corresponding to those in FIGS. 1 to 10 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In this example, as shown in FIGS. 11 and 12, a spring support column 11 is provided at an intermediate position between the brake pawls 11d and 11e of the sliding guide plate 11a of the brake body 11.
f, and a pair of substantially L-shaped walls 30a and 30b are provided near both sides of this spring support column 11f,
Approximately circular spring pushing walls 31a and 31b are provided at the upper ends of the bent portions of the walls 30a and 30b, and the sliding guide plates 11 of the spring pushing walls 31a and 31b are provided.
At the tip of the surface facing a, anti-slip claws 32a and 32b having a substantially triangular cross section are provided. in this case,
One side of each of the walls 30a and 30b is connected to the spring support column 11f in the longitudinal direction of the sliding guide plate 11a.
, and the other sides thereof are oriented diagonally toward the shielding wall 14d of the upper half 2. or,
A space is provided between the spring pushing walls 31a and 31b, as shown by the two-dot chain line in FIG. 11, such that the spring 27 holding one arm and the other arm can pass therethrough, and a spring pushing wall as shown in FIG. 13 is provided. The distances l and h between 31a and 31b and the sliding guide plate 11a are not approximately equal to the heights of one arm part and the other arm part of the spring 27 when the coil part 27a of the spring 27 is fitted to the spring support column 11f. , spring-loaded wall 3 of the falling-off prevention claws 32a, 32b
The protrusion height from 1a, 31b is determined by the spring push wall 31a,
Spring 2 located between 31b and sliding guide plate 11a
The one arm part and the other arm part of No. 7 should not easily come off.

33a and 33b are approximately circular punch holes provided in the portions of the sliding guide plate 11a facing the spring pushing walls 31a and 31b, respectively, as shown in FIG. Others upper half 2, lower half 3, reel hub 4a,
4b, front cover 8, and slider 9 are constructed in the same manner as the tape cassette shown in FIGS. 3 to 10 above.

According to such a configuration, the 11th
As shown by the two-dot chain line in the figure, with the coil portion 27a of the spring 27 aligned on the spring support column 11f, one arm portion and the other arm portion of the spring 27 are pinched to move between the pair of spring push walls 31a and 31b. Once close to the coil part 27a of the spring 27, drop it in so that it passes through.
is fitted to the spring support column 11f, and the sliding guide plate 1
After positioning the spring 27 on 1a, one arm part and the other arm part of the spring 27 are made free and the sliding guide plate 11
a and a pair of spring pushing walls 31a and 31b. In this case, one arm portion and the other arm portion of the spring 27 are connected to the sliding guide plate 11a and the pair of spring pushing walls 31a.
and 31b, the spring pushing walls 31a, 31b are elastically deformed to overcome the falling-off prevention claws 32a, 32b. For this reason, spring 27
When the one arm portion and the other arm portion are positioned at a predetermined position between the sliding guide plate 11a and the pair of spring pushing walls 31a and 31b, the one arm portion and the other arm portion of the spring 27 are held in place by the falling-off prevention claws 32a and 32b. Claw 3 to prevent arms from falling off
2a, 32b to prevent it from slipping out between the sliding guide plate 11a and the pair of spring pushing walls 31a, 31b. With such a simple operation, the brake body 11 and the spring 27 can be handled as one, making it extremely easy to handle.

Also, as shown in FIGS. 11 and 12, the spring 27
When the brake body 11 with the attached brake body 11 is attached to the upper half 2, the movement range of the one arm part and the other arm part of the spring 27 is restricted by the falling-off prevention claws 32a and 32b, so that the movement range of the spring 27 is centered around the spring support column 11f. The position of the spring 27, which rotates in the direction of the arrow A, is regulated within a predetermined range, and the one arm and the other arm of the spring 27 do not come into contact with the end of the shielding wall 14d, making installation, that is, assembly, easy. can.

Furthermore, when molding the brake body 11 by injection molding, the spring pushing walls 31a, 3 of the sliding guide plate 11a
Since the punch holes 33a and 33b are provided at positions opposite to 1b, it can be obtained with a mold having a simple configuration.

The operation of such a tape cassette during use and when not in use is the same as that of the tape cassette shown in FIGS. 3 to 10 described above.

As described above, according to the tape cassette of this example, the reel hubs 4a, 4a around which the magnetic tape 6 is wound inside the cassette case 1, and the reel hubs 4a, 4a,
In a tape cassette provided with a brake body 11 that restricts rotation of the reel 4a and a spring 27 that biases the brake body 11 toward the reel hubs 4a and 4b,
Sliding guide plate 11a as a plate part of brake body 11
A spring support column 11f and a pair of spring push walls 31a and 31b are provided at predetermined positions of the spring support column 11f, and slip-off prevention claws 32a and 32b are provided on the plate portion 11a side of the pair of spring push walls 31a and 31b, so that the spring support column 11f is provided with a spring support column 11f and a pair of spring push walls 31a and 31b. The coil portion 27a of the spring 27 is fitted into the coil portion 27a, and one arm portion and the other arm portion of the spring 27 are connected to the spring pushing wall 31, respectively.
a, 31b and the plate portion 11a, and the spring 2
Spring pushing walls 31a, 31 of one arm part and the other arm part of 7
b and the plate portion 11a.
Since the prevention is made at points a and 32b, there is an advantage that simple assembly is facilitated.

It goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.

Effects of the Invention According to the tape cassette of the present invention, a reel hub for winding the tape inside the cassette case, a brake body for regulating the rotation of this reel hub, and a spring for biasing this brake body toward the reel hub side are provided. In the tape cassette, a spring support column and a pair of spring pushing walls are provided at predetermined positions on the plate part of the brake body, and a pull-out prevention claw is provided on the plate side of the pair of spring pushing walls, and the coil part of the spring is attached to the spring supporting column. At the same time, one end and the other end of the spring are respectively positioned between the spring pushing wall and the plate part, and the one arm part and the other arm part of the spring are prevented from coming out from between the spring pushing wall and the plate part with a slip-out prevention claw. Since it is designed to prevent this, there is an advantage that it can be easily assembled with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a tape cassette having a rotatable front cover and a slidable slider;
FIG. 2 is a perspective view showing a state in which the front cover of FIG. 1 is rotated upward and the slider is slid backward;
Fig. 3 is an exploded perspective view showing an example of a tape cassette with a brake body, Fig. 4 is a perspective view showing the inside of the upper half of Fig. 3, and Fig. 5 shows the state of Fig. 3 when not in use. 6 is a schematic diagram for explaining FIG. 5, FIG. 7 is a schematic plan view showing the state in use of FIG. 3, and FIG. 8 is an explanation of FIG. 7. 9 and 10 are schematic diagrams for explaining the brake body and spring, respectively. FIG. 11 is a plan view showing an embodiment of the main part of the tape cassette of the present invention, and FIG. The figure is a front view of FIG. 11, and FIGS. 13 and 14 are diagrams for explaining the brake body, respectively. 1 is a cassette case, 2 and 3 are an upper half and a lower half, respectively, 3a is a notch, 4a and 4b are each a reel hub, 6 is a magnetic tape, 8 is a front cover, 11
11a is a brake body, 11a is a sliding guide plate, 11d and 11e are brake pawls, 11f is a spring support column,
14d is a shielding wall, 26a and 26b are ratchet wheels, 27 is a spring, 27a is a coil portion, 31a and 31b are spring pushing walls, and 32a and 32b are pull-out prevention claws, respectively.

Claims (1)

[Scope of Claim for Utility Model Registration] A sliding reel hub in which a pair of reel hubs for winding tape inside the cassette housing and a pair of brake pawls for regulating the rotation of the pair of reel hubs are integrally disposed on a plate part. It comes into contact with the brake body and the contact part provided inside the cassette housing,
A tape cassette including a biasing toggle spring that biases the brake body toward the reel hub, the tape cassette including a spring support column, a pair of walls provided near both sides of the spring support column, and a plate of the brake body. A pair of elastically deformable spring pushing walls provided at the upper ends of the pair of walls are connected to the pair of brake pawls on the plate portion of the brake body. The coil portion of the biasing toggle spring is integrally formed at an intermediate position, and the coil portion of the biasing toggle spring is fitted into the spring support column, and one arm portion and the other arm portion of the biasing toggle spring are connected to the pair of spring pushing walls and the spring support column. The retaining claw prevents one arm and the other arm of the biasing toggle spring from coming off between the pair of spring pushing walls and the plate. A tape cassette characterized by: