JP2001344935A - Tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape cassette having a half structure which prevents the infiltration of outdoor air into the tape cassette during traveling of the tape in a VTR and with which the always stable traveling action of the tape is carried out. SOLUTION: The tape cassette is so constituted that areas to be housed with a supply side reel and take-up side reel in a cassette body consisting of an upper half and a lower half are segmented by a partition wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a half structure for forming a cassette body of a tape cassette used for a magnetic recording / reproducing device such as a video tape recorder or other various information processing devices.

[0002]

2. Description of the Related Art In recent years, with the increase in density of magnetic recording,
Video tape recorders (hereinafter, referred to as VTRs) and tape cassettes have become compact, and VTRs have been increasingly used outdoors, such as for capturing landscapes and photographing.

However, in outdoor use, it is particularly important to consider dust, and the tape cassette also has a two- or three-sheet type lid structure that covers the front and rear surfaces of the tape to shield the tape from outside air as a measure against dust. Has been devised and put into practical use.

Hereinafter, the above-described conventional tape cassette 10 will be described with reference to the drawings. 7 is an assembled perspective view in a closed state, FIG. 8 is an assembled perspective view in an opened state, and FIG. 9 is an exploded perspective view. In FIG. 8, the cassette body is formed as an integral housing by combining upper half 2 and lower half 3 formed of synthetic resin from above and below. The cassette body contains a supply reel 5a around which the tape 4 is wound and a take-up reel 5b. An opening 6 for inserting a tape pull-out member (not shown) on the VTR side is provided on the front surface of the cassette body.
A pair of tape guides 7 formed integrally with the lower half 3 is provided on both sides of the lower half 3 side of the opening 6, and the tape 4 is guided by the tape guide 7 and stretched along the opening 6. Is done. When the tape 4 is closed, the tape 4 is covered by an upper cover 8, an inner rear cover 9 and a front cover 11 as shown in FIG. Chips are coming in.

[0005] In FIG. 9, a front cover 11 includes a front portion 11 a for covering the front surface of the tape 4 stretched over the opening 6 and an upper half 2.
And a side plate 11b that covers the front side surface of the lower half 3, and has a substantially U-shape. A pair of fulcrum pins 11c is provided on the side plate 11b of the front lid 11, and the fulcrum pins 11c are inserted into a pair of notches 2b provided on both front side walls of the upper half 2. A coil spring 12 is mounted on one side of the fulcrum pin 11c of the front cover 11, and constantly biases the front cover 11 in the closing direction. Further, a pair of pin holes 11d are formed at both ends of the front portion 11a of the front lid 11, and a pair of notches 11e are formed at the lower portions of both ends.

[0006] The upper lid 8 is provided with a tape 4 stretched over the opening 6.
And a side plate 8b that covers the side surface of the upper half 2. A pair of support pins 8c are provided on the front inner side of the side plate 8b of the upper lid 8, and the support pins 8c are inserted into pin holes 11d of the front lid 11 and are rotatable. A pair of guide pins 8d is provided on the rear inner side of the side plate 8b. Further, a pair of bearing portions 8e having an interval distance substantially equal to the width of the opening 6 is provided on the inner surface side of the upper surface portion 8a. A pair of cutouts 2c are provided in front of the side wall of the upper half 2 so that the cutouts are approximately the same as the thickness of the side plate 8b of the upper lid 8. The notch 2c has a curved portion and a straight portion, and has a pair of guide grooves 2d open at one end.
Guide pins 8d are slidably mounted.

The rear cover 9 has a substantially U-shape, and covers the back surface of the tape 4 stretched over the opening 6. Back lid 9
A pair of support pins 9a are provided on the upper side surface of the
The support pin 9a is rotatably attached to a bearing 8e of the upper lid 8. Further, a projection 9c having a pair of guide pins 9b is provided on a lower side surface of the rear lid 9.

The tape 4 is provided on both sides of the opening 6 of the lower half 3.
Is formed with a supply side passage opening 3a and a winding side passage opening 3b. A pair of tape guides 7 and a pair of rear lid guide grooves 3c are provided behind the pair of tape guides 7 on the opening 6 side of the passage openings 3a and 3b. A guide pin 9b of the rear lid 9 is slidably inserted into the rear lid guide groove 3c. On the other hand, passage 3
At the front ends of the tape cassettes a and 3b, there are provided front position restricting projections 3d for determining a front position when the tape cassette 10 is inserted into a cassette holder (not shown) of the VTR.
A substantially triangular rib 13 having an insertion hole 13a into which a detection lamp (not shown) on the VTR side for detecting the start and end of the tape 4 is formed at the center of the opening 6 of the lower half 3. Have been. A pair of walls 14 and 15 are provided upright at the center of the rear surface of the lower half 3 in the front-rear direction. A pair of walls 1
A reel lock member 16 is inserted between the reels 4 and 15 to lock the supply reel 5a and the take-up reel 5b. Reference numeral 17 denotes a spring that constantly biases the reel lock member 16 in the lock direction. 18 is a reel lock member 1
6 is a position regulating pin for positioning in the front direction. A slit 19 is provided in one wall 3e of the lower half 3, and a bearing portion 19a is formed in an upper part of the wall inside the slit 19. A lid lock member 20 is attached to the bearing portion 19a, and the lid lock member 20 is urged in a locking direction by a leaf spring 21. The upper half 2 and the lower half 3 are fastened by screws 22.

The tape cassette 10 constructed as described above
The operation will be described below. FIG. 10 is an overall internal plan view showing a state in which a lid is closed, FIG. 11 is an overall internal plan view showing a state where the tape cassette 10 is mounted on a VTR, and FIG.
FIG. 3 is an overall internal plan view showing a state where a predetermined tape path is formed.

When not in use, as shown in FIG.
Is covered by an upper cover (not shown), a front cover 11a of a rear cover 9 and a front cover 11, and a supply-side passage opening 3a on both sides of the opening 6 of the lower half 3 and The take-up side passage opening 3b is closed by the front surface 11a of the front cover 11, so that the tape 4 does not come into contact with the outside air.

When the tape cassette 10 is mounted on the VTR, the front lid 11 is rotated by a lid opening / closing lever (not shown) provided on the VTR side as shown in FIG. The side passage opening 3a and the winding side passage opening 3b are opened. Also, the second VTR side
The guide post 23, the third guide post 24, the fourth guide post 25, the fifth guide post 26, the sixth guide post 27, the tenth guide post 28, and the pinch roller 29 enter. 30 is a first guide post, 31 is an erase head, 32 is a rotary head cylinder, 33 is a seventh guide post, 34 is an audio control head, 3
5 is an eighth guide post, 36 is a ninth guide post, 37
Is a capstan, 38 is an eleventh guide post, and 39 is a twelfth guide post.

Next, the tape 6 is attached to the second guide post 23,
The movement of the third guide post 24, the fourth guide post 25, the fifth guide post 26, the sixth guide post 27, the tenth guide post 28, and the pinch roller 29 forms a predetermined tape path as shown in FIG. , Playback, fast forward, rewind, etc. are performed.

[0013]

However, this configuration has the following problems. The tape running is performed at a relatively low speed in the recording mode or the reproducing mode, but is performed at a high speed exceeding 100 times the recording mode or the reproducing mode in the fast-forward mode or the rewind mode. FIG.
FIG. 14 is a state diagram showing the flow of air in the tape cassette 10 during fast-forward traveling, and FIG. 14 is a state diagram showing the flow of air in the tape cassette 10 during rewinding traveling.

At the time of fast-forward running, as shown in FIG. 13, since the supply reel 5a rotates at a high speed in the direction a, an air flow in the direction B is generated around the supply reel 5a. On the other hand, the take-up reel 5b rotates at a high speed in the direction C, so that a flow of air in the direction D occurs around the take-up reel 5b. As a result, a large air flow (arrow e in the drawing) occurs from the take-up reel 5b to the supply reel 5a inside the cassette. Since the supply-side passage opening 3a and the winding-side passage opening 3b are open, outside air flows from the winding-side passage opening 3b to the arrow F.
To the supply side passage opening 3a
Is discharged in the direction of arrow G.

Next, during rewinding, as shown in FIG. 14, the supply reel 5a rotates at a high speed in the H direction, so that an air flow in the I direction is generated around the supply reel 5a. On the other hand, since the take-up reel 5b rotates at a high speed in the J-direction, air flows in the K-direction around the take-up reel 5b. As a result, a large air flow (arrow L in the drawing) is generated from the take-up reel 5b to the supply reel 5a inside the cassette. Since the supply-side passage 3a and the winding-side passage 3b are open, outside air enters in the direction of arrow M from the supply-side passage 3a, passes through the inside of the cassette, and moves in the direction of arrow N from the winding-side passage 3b. Is discharged.

As a result, air containing dust floating in the VTR enters the tape cassette 10 and adheres to the tape or bites between the tapes, so that image deterioration and recording / reproduction cannot be performed. And other problems have occurred.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a tape cassette having a half structure for preventing outside air from entering the tape cassette when the tape runs in a VTR.

[0018]

A tape cassette according to the present invention that solves the above-mentioned problems is configured such that an area in a cassette body in which a supply reel and a take-up reel are stored is partitioned by a partition wall. I have.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is an exploded perspective view of a tape cassette 1 according to the present invention. The same members as those of the conventional tape cassette 10 shown in FIGS. 7 to 14 are denoted by the same reference numerals. The basic structure of the tape cassette 1 is the same as that of the conventional tape cassette 10.

In FIG. 1, a front lid 11 has a front surface 11 a for covering the front surface of the tape 4 stretched over the opening 6 and an upper half 2.
And a side plate 11b that covers the front side surface of the lower half 3, and has a substantially U-shape. A pair of fulcrum pins 11c is provided on the side plate 11b of the front lid 11, and the fulcrum pins 11c are inserted into a pair of notches 2b provided on both front side walls of the upper half 2. A coil spring 12 is mounted on one side of the fulcrum pin 11c of the front cover 11, and constantly biases the front cover 11 in the closing direction. Further, a pair of pin holes 11d are formed at both ends of the front portion 11a of the front lid 11, and a pair of notches 11e are formed at the lower portions of both ends.

The upper lid 8 is provided with a tape 4 stretched over the opening 6.
And a side plate 8b that covers the side surface of the upper half 2. A pair of support pins 8c are provided on the front inner side of the side plate 8b of the upper lid 8, and the support pins 8c are inserted into pin holes 11d of the front lid 11 and are rotatable. A pair of guide pins 8d is provided on the rear inner side of the side plate 8b. Further, a pair of bearing portions 8e having an interval distance substantially equal to the width of the opening 6 is provided on the inner surface side of the upper surface portion 8a. A pair of cutouts 2c are provided in front of the side wall of the upper half 2 so that the cutouts are approximately the same as the thickness of the side plate 8b of the upper lid 8. The notch 2c has a curved portion and a straight portion, and has a pair of guide grooves 2d open at one end.
Guide pins 8d are slidably mounted.

The rear cover 9 has a substantially U-shape, and covers the back surface of the tape 4 stretched over the opening 6. Back lid 9
A pair of support pins 9a are provided on the upper side surface of the
The support pin 9a is rotatably attached to a bearing 8e of the upper lid 8. Further, a projection 9c having a pair of guide pins 9b is provided on a lower side surface of the rear lid 9.

Tapes 4 are provided on both sides of the opening 6 of the lower half 3.
Is formed with a supply side passage opening 3a and a winding side passage opening 3b. A pair of tape guides 7 and a pair of rear lid guide grooves 3c are provided behind the pair of tape guides 7 on the opening 6 side of the passage openings 3a and 3b. A guide pin 9b of the rear lid 9 is slidably inserted into the rear lid guide groove 3c. On the other hand, passage 3
At the front ends of the tape cassettes 1a and 3b, there are provided front position regulating projections 3d for determining a front position when the tape cassette 1 is inserted into a cassette holder (not shown) of the VTR.
A substantially triangular rib 13 having an insertion hole 13a for inserting a detection lamp (not shown) on the VTR side for detecting the start and end of the tape 4 is provided at the center of the opening 6 of the lower half 3. The half 2 is formed to extend to the height position of the inner surface. A pair of walls 14 and 15 are provided upright at the center of the rear surface of the lower half 3 in the front-rear direction. The reel lock member 16 is inserted between the pair of walls 14 and 15, and the supply-side reel 5a is
The take-up reel 5b is locked. The reel lock member 16 is constantly urged in the lock direction by a spring 17, and the front position is determined by the upper half 2.
This is performed by a position regulating pin 18 which is extended to the height position of the inner surface of the second member. A partition wall 40 is provided between the above-described substantially triangular rib 13 and the position regulating pin 18 so as to partition a supply-side reel area and a take-up reel area. A slit 19 is provided in one wall 3 e of the lower half 3, and a bearing 1
9a are formed. A lid lock member 20 is attached to the bearing portion 19a, and the lid lock member 20 is urged in a locking direction by a leaf spring 21. In addition, upper half 2
And the lower half 3 are fastened by screws 22.

The operation of the tape cassette 1 of the present invention configured as described above will be described below. FIG. 2 is a state diagram showing the flow of air in the tape cassette 1 during fast-forward travel, and FIG. 3 is a state diagram showing the flow of air in the tape cassette 1 during rewind travel.

At the time of fast-forward traveling, as shown in FIG. 2, the supply reel 5a rotates at a high speed in the O direction, so that air flows in the P direction around the supply reel 5a. On the other hand, the take-up reel 5b rotates at a high speed in the Q direction, so that air flows in the R direction around the take-up reel 5b. However, since the flow of air from the take-up reel 5b side to the supply-side reel 5a side, which is conventionally caused by the partition wall 40, is blocked, the take-up reel 5 in the tape cassette 1 is blocked.
A large flow from the b side to the supply side reel 5a side does not occur, and no air flows from the winding side passage opening 3b.

Next, during rewinding, as shown in FIG. 3, the supply reel 5a rotates at a high speed in the S direction, so that a flow of air in the T direction is generated around the supply reel 5a. On the other hand, since the take-up reel 5b rotates at a high speed in the U-direction, air flows in the V-direction around the take-up reel 5b. However, the flow of air from the take-up reel 5b side to the supply-side reel 5a side, which is conventionally caused by the partition wall 40, is blocked, so that the take-up reel 5b side to the supply side reel 5a side in the tape cassette 1 Does not occur, and no air flows from the supply-side passage 3a.

As described above, Embodiment 1 of the present invention
With this configuration, the air containing dust floating in the VTR does not enter the tape cassette 1 and adheres to the tape or bites between the tapes. Can be solved. Further, since the cassette main body can be divided into two by the partition wall, there is an advantage that rigidity against bending and torsion can be improved.

(Embodiment 2) FIG. 4 is an exploded perspective view of a tape cassette 45 according to the present invention. The same members as those of the conventional tape cassette 10 shown in FIGS. 7 to 14 are denoted by the same reference numerals. Also, the tape cassette 45
Is basically the same as that of the conventional tape cassette 10.

In FIG. 4, a front lid 11 covers a front surface 11a for covering the front surface of the tape 4 stretched over the opening 6 and an upper half 2.
And a side plate 11b that covers the front side surface of the lower half 3, and has a substantially U-shape. A pair of fulcrum pins 11c is provided on the side plate 11b of the front lid 11, and the fulcrum pins 11c are inserted into a pair of notches 2b provided on both front side walls of the upper half 2. A coil spring 12 is mounted on one side of the fulcrum pin 11c of the front cover 11, and constantly biases the front cover 11 in the closing direction. Further, a pair of pin holes 11d are formed at both ends of the front portion 11a of the front lid 11, and a pair of notches 11e are formed at the lower portions of both ends.

The upper lid 8 is provided with the tape 4 stretched over the opening 6.
And a side plate 8b that covers the side surface of the upper half 2. A pair of support pins 8c are provided on the front inner side of the side plate 8b of the upper lid 8, and the support pins 8c are inserted into pin holes 11d of the front lid 11 and are rotatable. A pair of guide pins 8d is provided on the rear inner side of the side plate 8b. Further, a pair of bearing portions 8e having an interval distance substantially equal to the width of the opening 6 is provided on the inner surface side of the upper surface portion 8a. A pair of cutouts 2c are provided in front of the side wall of the upper half 2 so that the cutouts are approximately the same as the thickness of the side plate 8b of the upper lid 8. The notch 2c has a curved portion and a straight portion, and has a pair of guide grooves 2d open at one end.
Guide pins 8d are slidably mounted.

The rear cover 9 has a substantially U-shape, and covers the back surface of the tape 4 stretched over the opening 6. Back lid 9
A pair of support pins 9a are provided on the upper side surface of the
The support pin 9a is rotatably attached to a bearing 8e of the upper lid 8. Further, a projection 9c having a pair of guide pins 9b is provided on a lower side surface of the rear lid 9.

The tape 4 is provided on both sides of the opening 6 of the lower half 3.
Is formed with a supply side passage opening 3a and a winding side passage opening 3b. A pair of tape guides 7 and a pair of rear lid guide grooves 3c are provided behind the pair of tape guides 7 on the opening 6 side of the passage openings 3a and 3b. A guide pin 9b of the rear lid 9 is slidably inserted into the rear lid guide groove 3c. On the other hand, passage 3
The front end portions a and 3b are provided with front position restricting projections 3d for determining a front position when the tape cassette 45 is inserted into a cassette holder (not shown) of the VTR.
A substantially triangular rib 13 having an insertion hole 13a for inserting a detection lamp (not shown) on the VTR side for detecting the start and end of the tape 4 is provided at the center of the opening 6 of the lower half 3. The half 2 is formed to extend to the height position of the inner surface. A pair of walls 14 and 15 are provided upright at the center of the rear surface of the lower half 3 in the front-rear direction. The reel lock member 16 is inserted between the pair of walls 14 and 15, and the supply-side reel 5a is
The take-up reel 5b is locked. The reel lock member 16 is constantly urged in the lock direction by a spring 17, and the front position is determined by the upper half 2.
This is performed by a position regulating pin 18 which is extended to the height position of the inner surface of the second member. A partition wall 41 which extends to the height of the inner surface of the lower half 3 provided on the upper half 2 when assembled is inserted between the above-described substantially triangular rib 13 and the position regulating pin 18, and the supply side reel. And a take-up reel area. A slit 19 is provided in one wall 3e of the lower half 3 and the slit 19
A bearing portion 19a is formed on the upper part of the inner wall. A lid lock member 20 is attached to the bearing portion 19a, and the lid lock member 20 is urged by a leaf spring 21 in the locking direction. The upper half 2 and the lower half 3 are fastened by screws 22.

As described above, Embodiment 2 of the present invention
With the configuration described above, the same effect as in the first embodiment can be obtained.

(Embodiment 3) FIG. 5 is an exploded perspective view of a tape cassette 46 according to the present invention. The same members as those of the conventional tape cassette 10 shown in FIGS. 7 to 14 are denoted by the same reference numerals. Also, the tape cassette 46
Is basically the same as that of the conventional tape cassette 10.

In FIG. 5, the front lid 11 has a front surface 11a for covering the front surface of the tape 4 stretched over the opening 6 and an upper half 2.
And a side plate 11b that covers the front side surface of the lower half 3, and has a substantially U-shape. A pair of fulcrum pins 11c is provided on the side plate 11b of the front lid 11, and the fulcrum pins 11c are inserted into a pair of notches 2b provided on both front side walls of the upper half 2. A coil spring 12 is mounted on one side of the fulcrum pin 11c of the front cover 11, and constantly biases the front cover 11 in the closing direction. Further, a pair of pin holes 11d are formed at both ends of the front portion 11a of the front lid 11, and a pair of notches 11e are formed at the lower portions of both ends.

The upper lid 8 is provided with the tape 4 stretched over the opening 6.
And a side plate 8b that covers the side surface of the upper half 2. A pair of support pins 8c are provided on the front inner side of the side plate 8b of the upper lid 8, and the support pins 8c are inserted into pin holes 11d of the front lid 11 and are rotatable. A pair of guide pins 8d is provided on the rear inner side of the side plate 8b. Further, a pair of bearing portions 8e having an interval distance substantially equal to the width of the opening 6 is provided on the inner surface side of the upper surface portion 8a. A pair of cutouts 2c are provided in front of the side wall of the upper half 2 so that the cutouts are approximately the same as the thickness of the side plate 8b of the upper lid 8. The notch 2c has a curved portion and a straight portion, and has a pair of guide grooves 2d open at one end.
Guide pins 8d are slidably mounted.

The rear cover 9 has a substantially U-shape, and covers the back surface of the tape 4 stretched over the opening 6. Back lid 9
A pair of support pins 9a are provided on the upper side surface of the
The support pin 9a is rotatably attached to a bearing 8e of the upper lid 8. Further, a projection 9c having a pair of guide pins 9b is provided on a lower side surface of the rear lid 9.

Tapes 4 are provided on both sides of the opening 6 of the lower half 3.
Is formed with a supply side passage opening 3a and a winding side passage opening 3b. A pair of tape guides 7 and a pair of rear lid guide grooves 3c are provided behind the pair of tape guides 7 on the opening 6 side of the passage openings 3a and 3b. A guide pin 9b of the rear lid 9 is slidably inserted into the rear lid guide groove 3c. On the other hand, passage 3
At the front ends of the tape cassettes a and 3b, there are provided front position regulating projections 3d for determining a front position when the tape cassette 46 is inserted into a cassette holder (not shown) of the VTR.
A substantially triangular rib 13 having an insertion hole 13a for inserting a detection lamp (not shown) on the VTR side for detecting the start and end of the tape 4 is provided at the center of the opening 6 of the lower half 3. The half 2 is formed to extend to the height position of the inner surface. A pair of walls 14 and 15 are provided upright at the center of the rear surface of the lower half 3 in the front-rear direction. The reel lock member 16 is inserted between the pair of walls 14 and 15, and the supply-side reel 5a is
The take-up reel 5b is locked. The reel lock member 16 is constantly urged in the lock direction by a spring 17, and the front position is determined by the upper half 2.
This is performed by a position regulating pin 18 which is extended to the height position of the inner surface of the second member. A partition wall 42 having substantially the same height as that of the lower half 3 is provided between the above-described substantially triangular rib 13 and the position regulating pin 18. A partition wall 4 having substantially the same height as the height of the upper half 2 is provided at the same position on the inner surface of the upper half 2.
The supply side reel area and the take-up side reel area are partitioned by the partition wall 42 and the partition wall 43 when they are combined. A slit 19 is provided in one wall 3e of the lower half 3 and the slit 19
A bearing portion 19a is formed on the upper part of the inner wall. A lid lock member 20 is attached to the bearing portion 19a, and the lid lock member 20 is urged in a locking direction by a leaf spring 21. The upper half 2 and the lower half 3 are fastened by screws 22.

As described above, Embodiment 3 of the present invention
With this configuration, the same effect as in the first and second embodiments can be obtained.

(Embodiment 4) FIG. 6 is an exploded perspective view of a tape cassette 47 according to the present invention. The same members as those of the conventional tape cassette 10 shown in FIGS. 7 to 14 are denoted by the same reference numerals. Also, the tape cassette 47
Is basically the same as that of the conventional tape cassette 10.

In FIG. 6, a front lid 11 includes a front surface 11a for covering the front surface of the tape 4 stretched over the opening 6 and an upper half 2.
And a side plate 11b that covers the front side surface of the lower half 3, and has a substantially U-shape. A pair of fulcrum pins 11c is provided on the side plate 11b of the front lid 11, and the fulcrum pins 11c are inserted into a pair of notches 2b provided on both front side walls of the upper half 2. A coil spring 12 is mounted on one side of the fulcrum pin 11c of the front cover 11, and constantly biases the front cover 11 in the closing direction. Further, a pair of pin holes 11d are formed at both ends of the front portion 11a of the front lid 11, and a pair of notches 11e are formed at the lower portions of both ends.

The upper lid 8 is provided with the tape 4 stretched over the opening 6.
And a side plate 8b that covers the side surface of the upper half 2. A pair of support pins 8c are provided on the front inner side of the side plate 8b of the upper lid 8, and the support pins 8c are inserted into pin holes 11d of the front lid 11 and are rotatable. A pair of guide pins 8d is provided on the rear inner side of the side plate 8b. Further, a pair of bearing portions 8e having an interval distance substantially equal to the width of the opening 6 is provided on the inner surface side of the upper surface portion 8a. A pair of cutouts 2c are provided in front of the side wall of the upper half 2 so that the cutouts are approximately the same as the thickness of the side plate 8b of the upper lid 8. The notch 2c has a curved portion and a straight portion, and has a pair of guide grooves 2d open at one end.
Guide pins 8d are slidably mounted.

The rear cover 9 has a substantially U-shape, and covers the back surface of the tape 4 stretched over the opening 6. Back lid 9
A pair of support pins 9a are provided on the upper side surface of the
The support pin 9a is rotatably attached to a bearing 8e of the upper lid 8. Further, a projection 9c having a pair of guide pins 9b is provided on a lower side surface of the rear lid 9.

The tape 4 is provided on both sides of the opening 6 of the lower half 3.
Is formed with a supply side passage opening 3a and a winding side passage opening 3b. A pair of tape guides 7 and a pair of rear lid guide grooves 3c are provided behind the pair of tape guides 7 on the opening 6 side of the passage openings 3a and 3b. A guide pin 9b of the rear lid 9 is slidably inserted into the rear lid guide groove 3c. On the other hand, passage 3
At the front ends of the tape cassettes a and 3b, a front position regulating projection 3d for determining a front position when the tape cassette 47 is inserted into a cassette holder (not shown) of the VTR is provided.
A substantially triangular rib 13 having an insertion hole 13a for inserting a detection lamp (not shown) on the VTR side for detecting the start and end of the tape 4 is provided at the center of the opening 6 of the lower half 3. The half 2 is formed to extend to the height position of the inner surface. A pair of walls 14 and 15 are provided upright at the center of the rear surface of the lower half 3 in the front-rear direction. The reel lock member 16 is inserted between the pair of walls 14 and 15, and the supply-side reel 5a is
The take-up reel 5b is locked. The reel lock member 16 is constantly urged in the lock direction by a spring 17, and the front position is determined by the upper half 2.
This is performed by a position regulating pin 18 which is extended to the height position of the inner surface of the second member. The above-mentioned substantially triangular rib 13 is provided with a slit 13b, and the position regulating pin 18 is provided with a slit 18a. A partition plate 44 is inserted between the slits 18b, and a supply reel area and a take-up reel area are formed. It is designed to be divided. A slit 19 is provided in one wall 3e of the lower half 3, and a bearing portion 19a is formed in an upper part of the wall inside the slit 19. A lid lock member 20 is attached to the bearing portion 19a, and the lid lock member 20 is urged by a leaf spring 21 in the locking direction.
The upper half 2 and the lower half 3 are fastened by screws 22.

As described above, Embodiment 4 of the present invention
In the configuration of Embodiment 1, Embodiment 2,
The same effect as that of the third embodiment can be obtained, and furthermore, since the partition wall is constituted by independent parts, there is no restriction on material selection, so that the degree of freedom in design is increased and the rigidity can be further improved. is there.

[0047]

As described above, according to the present invention, the area in which the supply-side reel and the take-up reel in the cassette main body are housed is partitioned by the partition wall, so that it floats in the VTR. It is possible to prevent problems such as image deterioration and recording / reproducing that the air containing dust does not enter the tape cassette and adhere to the tape or become jammed between the tapes. Further, since the cassette main body can be divided into two by the partition wall, there is an advantage that rigidity against bending and torsion can be improved.

As described above, according to the present invention, it is possible to provide a tape cassette having a half structure in which outside air can be prevented from entering the tape cassette and a stable tape running operation is always performed when the tape runs in the VTR. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a tape cassette 1 according to a first embodiment of the present invention.

FIG. 2 is a state diagram showing the flow of air in the tape cassette during fast-forward running according to the present invention.

FIG. 3 is a state diagram showing the flow of air in the tape cassette during rewinding travel according to the present invention.

FIG. 4 is an exploded perspective view of a tape cassette 45 according to Embodiment 2 of the present invention.

FIG. 5 is an exploded perspective view of a tape cassette 46 according to Embodiment 3 of the present invention.

FIG. 6 is an exploded perspective view of a tape cassette 47 according to Embodiment 4 of the present invention.

FIG. 7 is an assembled perspective view of a conventional tape cassette 10 in a closed state.

FIG. 8 is an assembled perspective view of a conventional tape cassette 10 in an open state.

FIG. 9 is an exploded perspective view of a conventional tape cassette 10.

FIG. 10 is an overall internal plan view of a conventional tape cassette 10 in a closed state.

FIG. 11 is an overall internal plan view showing a state in which a conventional tape cassette 10 is mounted on a VTR.

FIG. 12 is an overall internal plan view showing a state in which a conventional tape cassette 10 is guided by a predetermined tape path of a VTR.

FIG. 13 is a state diagram showing the flow of air in the tape cassette 10 when the conventional tape cassette 10 travels fast.

FIG. 14 is a state diagram showing the flow of air in the tape cassette 10 when the conventional tape cassette 10 is rewound.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tape cassette (of Embodiment 1 of this invention) 2 Upper half 3 Lower half 3a Supply side passage opening 3b Take-up side passage opening 4 Tape 5a Supply side reel 5b Take-up side reel 6 Opening 7 Tape guide 8 Top lid 9 Rear lid 10 (Conventional) tape cassette 11 Front lid 11a Front part (of front lid) 13 Substantially triangular rib 18 Position control pin 40 (for reel lock member) 40, 42 (Lower half) partition wall 41, 43 Partition wall (of upper half) 44 Partition plate 45 Tape cassette 46 (of Embodiment 3 of the present invention) Tape cassette 47 (of Embodiment 3 of the present invention) Tape cassette (of Embodiment 4 of the present invention)

Claims (5)

[Claims] 1. A cassette body comprising an upper half (2) and a lower half (3), a supply reel (5a) and a take-up reel (5b) having a tape (6) wound inside the cassette body. A partition wall (4) for dividing an area in which the supply-side reel (5a) and the take-up reel (5b) are stored.
0, 41, 42, 43, 44). 2. A partition wall (40) for defining an area in which the supply-side reel (5a) and the winding-side reel (5b) are stored is integrally formed on the inner surface of the lower half (3). The tape cassette according to claim 1, wherein: 3. A partition wall (41) defining an area in which the supply-side reel (5a) and the winding-side reel (5b) are stored is integrally formed on the inner surface of the upper half (2). The tape cassette according to claim 1, wherein: 4. A partition wall (43) integrally formed on the inner surface of the upper half (2) with a partition wall (43) in which the supply-side reel (5a) and the winding-side reel (5b) are stored. The partition wall (4) integrally formed on the inner surface of the half (3)
2. The tape cassette according to claim 1, wherein the tape cassette is constituted by a combination of (2). 5. A partition plate (44) which is independent of the upper half (2) and the lower half (3) by dividing a section of an area in which the supply reel (5a) and the winding reel (5b) are stored. 3. The tape cassette according to claim 1, wherein the tape cassette is formed by incorporating the tape cassette.