JPH06162721A - Tape cassette - Google Patents

Abstract

PURPOSE:To prevent a shutter, which floats from the region holding a cassette case and moves, from wearing during the movement of the shutter. CONSTITUTION:A lock arm 29 is placed in a cassette case 2. The arm is made of a synthetic resin molding and has a lock section 31 which engages with a lock pawl of a shutter 22. The section 31 of the arm 29 is made to engages with the lock pawl of the shutter so that the shutter is locked at the clogging position and a receiving projecting section 15, which butts against the lock arm 29 at slightly upper portion of the lock arm 29, is formed in the cassette case 2. A lock disengaging cam section 32 is formed on the lock arm. This section 32 is pressed by a lock disengaging member 38 provided in a recording and reproducing device, the lock arm 29 is moved up, the lock against the shutter 22 is disengaged, the lock arm 29, which is moving up, butts against the section 15 to move slightly up the entire cassette case.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a novel tape cassette. More specifically, regarding a tape cassette in which a shutter that moves between a closed position and an open position is slidably provided on the bottom surface of a cassette case that accommodates a tape reel wound with a recording medium tape, Another object of the present invention is to provide a novel tape cassette in which the cassette case is lifted from the area where it is held so that the moving shutter is not scratched.

[0002]

2. Description of the Related Art There is a tape cassette in which a shutter for moving between a closed position and an open position is provided on the bottom surface of a cassette case accommodating a tape reel wound with a recording medium tape.

Then, the tape cassette is usually mounted on a predetermined cassette mounting portion of the recording / reproducing apparatus while being held by a member for holding the tape cassette, which is called a cassette holder. The lock release member provided on the cassette holder releases the lock of the shutter to the closed position and moves the shutter to the open position.

[0004]

By the way, when the shutter is moved between the closed position and the open position, rubbing occurs between the shutter and the cassette holder, and the shutter and the cassette holder are scratched. If the shavings of the shutter or the cassette holder are generated, and the shavings adhere to the recording medium tape, the signal dropout may be caused.

[0005]

In order to solve the above-described problems, the tape cassette of the present invention has a lock arm having a lock portion which is made of a synthetic resin molded product and is engaged with the lock claw of the shutter in the cassette case. The lock arm of the lock arm is engaged with the lock claw of the shutter to lock the shutter in the closed position, and the receiving protrusion that abuts the lock arm is formed in the cassette case slightly above the lock arm. Then, a lock release cam portion is formed on the lock arm, and the lock release cam portion is pressed by a lock release member provided in the recording / reproducing apparatus to move the lock arm upward to release the lock on the shutter. At the same time, the lock arm that moves upward collides with the receiving projection so that the entire cassette case moves upward. One in which the.

[0006]

Therefore, in the tape cassette of the present invention, when the shutter is moved, the entire cassette case is lifted upwards, and the shutter is released between the cassette cassette and a member holding the tape cassette. Does not rub.

[0007]

The details of the tape cassette of the present invention will be described below with reference to the illustrated embodiments.

In the figure, 1 is a tape cassette, and 2 is a cassette case made of synthetic resin.

The cassette case 2 has a rectangular shape that is long in the horizontal direction when viewed from above, and is formed into a thin box shape with a vertical width.
Tape outlets 3 are formed at both left and right ends of the front surface.

Further, a concave portion 4 called a mouth portion is formed in a portion between the tape outlets 3 and 3 and is opened forward and downward.

In the cassette case 2, tape reels 6, 6 around which a magnetic tape 5 is wound are rotatably accommodated in a state of being arranged side by side, and a part of the magnetic tape 5 is the tape outlets 3, 3. And is located along the front surface of the mouse unit 4.

Numerals 7 and 7 are reel stand insertion holes formed on the bottom wall 8 of the cassette case 2 side by side, and reel stand engaging holes opened on the lower surfaces of the reel hubs 9 and 9 of the tape reels 6 and 6, respectively. 9a and 9a are exposed to the outside through the reel stand insertion holes 7 and 7.

The front end portions 10a, 10a of the side walls 10, 10 of the cassette case 2 are displaced toward the inside so that they approach each other, whereby the lock arm placement spaces 10b, 10b are formed on the outer side of the front end portion of the cassette case 2. Has been done.

Front end portions 10a, 10a of the side walls 10, 10
Further, the tip portions 10c, 10c are displaced slightly further inward, and rib-shaped stop strips 11, 11 extending in the front-rear direction are integrally provided on the outer surface of the tip portions 10c, 10c.

Reference numerals 12 and 12 denote side wall front end portions 10a and 10a.
Is a columnar support pin integrally projectingly provided at a substantially central portion of the outer surface of the support pin 12, and the locking claw piece 1 is provided from the front of the support pin 12, 12.
3, 13 are integrally formed to project in the same direction as the support pins 12, 12, and the support pin 1 is provided at the tip of the locking claw pieces 13, 13.
Locking claws 13 projecting toward the tips of 2 and 12
a and 13a are formed.

Reference numerals 14, 14 denote side wall front end portions 10a, 10a.
Is a hooking portion projecting from a position behind the support pins 12, 12 in the outer surface of the same in the same direction as the projecting direction of the support pins 12, 12.

Reference numerals 15 and 15 denote front end portions 10a and 10a of the side wall.
Of the outer surfaces of the support pins 12, 12 and the front ends thereof, the receiving projections are provided at a height substantially lower than the support pins 12, 12.

Further, 16 and 16 are also the front end portion 1 of the side wall.
0a, 10a is a receiving rib projectingly provided on the outer surface of the support pins 12, 12 just below the support pins 12, 12, and its lower surface 17,
Reference numeral 17 is formed in an inverted trapezoidal shape. That is, the receiving rib 1
The lower surfaces 17 and 17 of the reference numerals 6 and 16 are front slopes 17a and 17a,
It is provided with intermediate planes 17b and 17b and rear slopes 17c and 17c.

Reference numeral 18 denotes a front lid rotatably supported on the front end of the cassette case 2 in the vertical direction, and has a plate-shaped front surface portion 19 and a front surface portion 19 having a size that covers substantially the entire front surface of the cassette case 2. Side surface portions 20 and 20 projecting rearward from both left and right edges of 19 are provided, and the side surface portions 20 and 20 are rotatably supported by the front end portion of the cassette case 2.

The front portion 19 of the front lid 18
Notches 21 and 21 are formed at both left and right ends of the lower edge.

A shutter 22 is slidably supported on the bottom surface of the cassette case 2 in the front-rear direction. The shutter 22 is made of synthetic resin or a metal plate.

The shutter 22 includes a bottom surface portion 23 and a side surface portion 2 which is erected upward from both left and right edges of the bottom surface portion 23.
4 and 24, the front end is provided with notches 25, 25 that are open in the front end and that are long in the front-rear direction between the side surface parts 24, 24 and the bottom surface part 23.

Then, the notch 25 in the bottom portion 23,
Hook holes 26, 26 are formed at a position just behind 25.

Further, the lock claw 2 is provided at a position along the inner side edges of the cutouts 25, 25 at the left and right end portions of the front end portion of the bottom surface portion 23.
7, 27 are formed in a rising shape.

Reference numerals 28 and 28 denote bottom portions 23 of the shutter 22.
Is a facing hole formed side by side in the left-right direction.

However, such a shutter 22 is
The bottom surface portion 23 is in contact with the bottom surface of the cassette case 2, and the side surface portions 24, 24 are in contact with the left and right side surfaces of the cassette case 2. .

Then, with the shutter 22 positioned at the front end of its movement range (in the closed position), the front end portion closes the lower surface opening of the mouth portion 4 of the cassette case 2 and its facing hole. 28 and 28 are displaced from the reel base insertion holes 7, 7 on the bottom surface of the cassette case 2 to close the reel base insertion holes 7, 7.

Further, with the shutter 22 positioned at the rear end of its moving range (in the open position), the lower surface opening of the mouse portion 4 of the cassette case 2 is opened and its facing holes 28, 28 are formed. Coincides with the reel stand insertion holes 7, 7 of the cassette case 2, and thereby the reel stand engagement holes 9a, 9a of the tape reels 6, 6 are exposed to the outside.

29 and 29 'are lock arms. Since these lock arms 29, 29 'have a symmetrical shape, one of them 29 will be described in detail, and the other 2
As for 9 ', the reference numeral assigned to each portion of the one 29 is attached with the reference numeral "'", and the description thereof is omitted.

Reference numeral 30 denotes a main part of the lock arm 29, which has a substantially inverted "F" shape when viewed from the side and has a plate shape whose width direction follows the vertical direction. Is bent inwardly, and the front surface 31 of the portion bent in the left-right direction of the crank-shaped bent portion serves as a lock portion, and further, a locking projection 30a is provided on the inner surface of the front end.

Reference numeral 32 denotes a rib-shaped lock releasing cam portion formed on the inner side surface of the main portion 30 excluding the front end portion thereof. The horizontal portion 32a extends substantially horizontally and the front side extending upward from the front end of the horizontal portion 32a. And an inclined portion 32b. Incidentally, 32c is a rear side inclined portion extending rearward and upward from the rear end of the horizontal portion 32a.

A boss portion 33 extending in the left-right direction is integrally formed at the rear end of the main portion 30, and a receiving hole 34 is formed in the boss portion 33 so as to pass through the boss portion 33 in the left-right direction.

Reference numeral 35 denotes an integral spring portion integrally provided so as to project rearward from the boss portion 33, and is formed in a plate shape whose width direction extends in the left-right direction.

Reference numeral 36 denotes a fan-shaped sliding engagement portion projecting forward from just above the portion of the front surface of the boss portion 33 where the base end of the main portion 30 is located.

The lock arm 29 described above is assembled in the lock arm arrangement space 10b of the cassette case 2 in the following manner.

That is, the front end portion 1 of the side wall of the cassette case 2
The support pin 12 formed at 0a is inserted into the receiving hole 34 of the lock arm 29. At this time, at the same time, cassette case 2
The locking claw 13a of the locking claw piece 13 engages with the front end edge portion of the outer surface of the sliding locking portion 36 of the lock arm 29 to prevent the lock arm 29 from coming off the support pin 13. . Thus, the lock arm 29 is supported in the lock arm placement space 10b of the cassette case 2 so as to be vertically rotatable.

The integral spring portion 35 of the lock arm 29 is also included.
The rear end portion is elastically contacted from above with the hooking portion 14 formed on the front end portion 10a of the side wall of the cassette case 2, whereby the lock arm 29 is rotated clockwise when viewed from the right side (see FIG. 4). The turning force is activated.

Then, the locking projection 30a formed on the front end of the lock arm 29 comes into contact with the stopper piece 11 formed on the tip of the front end 10a of the side wall of the cassette case 2 from above to lock the lock arm 29. Rotation in the rotational direction is blocked, and the lock arm 29 is held in the locked position.

In this way, the lock claw 27 of the shutter 22 in the closed position is positioned in front of the lock portion 31 of the lock arm 29 held in the lock position, and the shutter 22
Are locked in the closed position.

In addition, the lock arm 29 in the lock position
A receiving projection 15 projecting from the front end 10a of the side wall of the cassette case 2 faces the upper part of the middle part of the main part.

Reference numeral 37 denotes a cassette holder provided in the recording / reproducing apparatus, and lock releasing protrusions 38, 38 are provided at positions corresponding to the inside of the lock arm arrangement spaces 10b, 10b of the tape cassette 1 loaded in the cassette holder. Shutter drive claws 39, 39 are provided at positions corresponding to the outer sides of the lock arm placement spaces 10b, 10b.

When the tape cassette 1 is loaded into the cassette holder 37 (inserted in the direction shown by the arrow in FIG. 14), the cassette holder 37 is inserted.
Lock release protrusions 38, 38 and shutter drive pawl 3
9 and 39 are relatively inserted into the lock arm arrangement spaces 10b and 10b of the tape cassette 1 through the notches 21 and 21 formed on the left and right of the front lid 18 (see FIGS. 14 and 15).

Then, the lock release projections 38, 38 are provided on the lock release cam portions 32, 3 of the lock arms 29, 29 '.
The lock arms 29, 29 'contact the front inclined portions 32b, 32'b of the 2' (see FIG. 16) and push the inclined portions 32b, 32'b upward and rearward, so that the lock arms 29, 29 'are integrated springs. It rotates so that its front end moves upwards against the turning force urged by the parts 35 and 35 '(see FIG. 1).
7), and eventually, the unlocking protrusions 38, 38 come into contact with the lower surfaces of the horizontal portions 32a, 32'a of the unlocking cam portions 32, 32 ', and the locking portions 3 of the locking arms 29, 29'.
1, 31 'move upward from the rear of the lock claws 27, 27 of the shutter 22 (see FIG. 18). At the same time, the lock release protrusions 38, 38 have their rear end surfaces 38a,
38a abuts on the inner edges of the cutouts 25, 25 of the shutter 22, and from here, the rear end surface 38 of the lock release protrusions 38, 38.
a and 38a press the shutter 22 toward the open position (see FIGS. 5 and 18).

Further, in the state shown in FIG. 18, the upper surfaces 30b, 3 of the main portions 30, 30 'of the lock arms 29, 29'.
0'b is the front end portions 10a, 10 of the side wall of the cassette case 2.
It abuts on the lower surfaces of the receiving projections 15 and 15 that are provided to project from a.
Then, the upper surfaces of the lock release protrusions 38, 38 are locked to the lock arms 29, 29 'while proceeding from here to the position shown in FIG.
Horizontal portions 32b, 3 of the unlocking cam portions 32, 32 'of
Since the 2'b is pushed upward, the lock arms 29, 2
The receiving projections 15, 1 through the main portions 30, 30 'of 9'.
5 is pushed upwards, whereby the cassette case 2
Is slightly lifted from the bottom wall 37a of the cassette holder 37, and the shutter 22 moving toward the open position can be prevented from rubbing against the bottom wall 37a of the cassette holder 37.

In the state shown in FIG. 19, the lock release projection 3
The upper surfaces of 8, 38 are the front end portions 10 of the side wall of the cassette case 2.
The state where the cassette case 2 is in contact with the lower surfaces of the receiving ribs 16 and 16 projecting from a and 10a, and the cassette case 2 is lifted from the bottom wall 37a of the cassette holder 37 is maintained.

Then, the tape cassette 1 is further inserted into the cassette holder 37, and the shutter 22 reaches the completely open position (see FIG. 20). In this state, the upper surfaces of the lock release protrusions 38, 38 have the receiving ribs 16,
16, the cassette case 2 is placed on the bottom wall 37a of the cassette holder 37.

As shown in FIG. 21, the lengths of the lock release protrusions 38, 38 in the front-rear direction are formed to be long so that the cassette case 2 can be opened even when the shutter 22 reaches the open position.
May be lifted from the bottom wall 37a of the cassette holder 37.

In this way, the shutter 22 is opened (see FIG. 6).

The tape cassette 1 is the cassette holder 37.
When it is taken out from, it moves in the opposite direction, so
The unlocking protrusions 38, 38 of the cassette holder 37 firstly cause the unlocking cam portion 3 of the locking arms 29, 29 '.
The lock arms 29, 29 'are brought into contact with the rear side inclined portions 32c, 32'c of the reference numerals 32, 32' and press the inclined portions 32c, 32'c forward and upward.
The front end portion pivots so as to move upward against the turning force urged by the lock release cams 5, 35 ', and the lock release protrusions 38, 38 eventually release the lock release cam portions 32, 32'.
Of the lock arms 29, 29 'are brought into contact with the lower surfaces of the horizontal portions 32a, 32'a of the shutter 2,
It moves to a position higher than the second lock claws 27, 27.

Meanwhile, the catch holes 26, 2 of the shutter 22 are provided.
The shutter drive claws 39, 39 of the cassette holder 37, which are engaged with 6, move relatively toward the front side of the tape cassette 1 and move the shutter 22 toward the closed position.

The shutter 22 has its lock claw 2
7 and 27 are lock portions 31 of lock arms 29 and 29 '.
When it reaches the position immediately before 31 ', the cassette holder 37
The lock release protrusions 38, 38 of the lock arms 29, 2
9'is disengaged from the unlocking cam portions 32, 32 'via the front side inclined surfaces 32b, 32'b, whereby the lock arms 29, 29' have their lock portions 31, 31 'locked by the lock claws 27 of the shutter 22. , 27 back to the locked position, which locks the shutter 22 in the closed position.

While the shutter 22 is returned to the closed position, the cassette case 2 is lifted from the bottom wall 37a of the cassette holder 37 during the movement to the open position as shown in FIGS. It is the same.

[0053]

As is clear from the above description, the tape cassette of the present invention moves between the closed position and the open position on the bottom surface of the cassette case that accommodates the tape reel wound with the recording medium tape. In a tape cassette having a shutter slidably provided, a lock arm having a lock part that is made of a synthetic resin molded product and engages with a lock claw of the shutter is arranged in the cassette case, and the lock part of the lock arm is The shutter is locked at the closed position by engaging with the lock claw of the shutter, and the receiving protrusion that abuts against the lock arm is formed in the cassette case slightly above the lock arm. Is formed, and the lock releasing cam portion is pressed by a lock releasing member provided in the recording / reproducing apparatus to move the lock arm upward. Are moved together to release the lock on the shutter, characterized in that the locking arm to move upward and to the entire cassette case and abutting the said receiving protruding portion is moved to 稍上 direction.

Therefore, in the tape cassette of the present invention, when the shutter is moved, the entire cassette case is lifted upward, and the shutter is released between the cassette cassette and a member holding the tape cassette. Does not rub.

The shapes and structures of the respective parts shown in the above embodiments are merely examples of the implementation of the present invention, and the technical scope of the present invention is limited by these. Should not be interpreted.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of implementation of a tape cassette of the present invention.

FIG. 2 is a horizontal sectional view.

FIG. 3 is a bottom view.

FIG. 4 shows a state in which the shutter is in the closed position, IV of FIG.
It is a figure cut and shown by a-IV line.

5 is a diagram showing a state in which a lock with respect to a shutter is released, cut at the same position as in FIG. 4;

FIG. 6 is a diagram showing a state in which a shutter is in an open position, cut at the same position as in FIG. 4;

FIG. 7 is a side view of a lock arm.

FIG. 8 is a side view showing the side of the lock arm opposite to that of FIG. 7.

FIG. 9 is a plan view of a lock arm.

FIG. 10 is a plan view of a shutter.

FIG. 11 is a side view of the shutter.

FIG. 12 is a plan view of the front lid.

FIG. 13 is a front view of the front lid.

FIG. 14 is a cross-sectional view of a main part showing the opening operation of the shutter together with FIGS. 15 to 20, and this figure shows the initial state.

FIG. 15 shows a state following FIG.

16 shows a state following FIG. 15. FIG.

FIG. 17 shows a state following FIG. 16.

FIG. 18 shows a state following FIG.

FIG. 19 shows a state following FIG. 18.

FIG. 20 shows a state following FIG. 19.

FIG. 21 is a cross-sectional view of a main part showing a modified example.

[Explanation of symbols]

 1 tape cassette 2 cassette case 5 recording medium tape 6 tape reel 15 receiving protrusion 16 receiving rib 22 shutter 27 locking pawl 29, 29 'locking arm 31, 31' locking portion 32, 32 'unlocking cam portion 38 unlocking member

Claims (4)

[Claims] 1. A tape cassette in which a shutter for moving between a closed position and an open position is slidably provided on a bottom surface of a cassette case accommodating a tape reel wound with a recording medium tape. A lock arm that is made of a synthetic resin molded product and has a lock part that engages with the lock claw of the shutter is arranged, and the lock part of the lock arm is engaged with the lock claw of the shutter to lock the shutter in the closed position. And a receiving projection that abuts against the lock arm is formed in the cassette case slightly above the lock arm, and a lock releasing cam portion is formed on the lock arm, and the lock releasing cam portion is provided in the recording / reproducing apparatus. The lock arm is pushed by the lock release member, and the lock arm is moved upward to unlock the shutter and move upward. A tape cassette, characterized in that a lock arm abutting against the receiving projection is adapted to move the entire cassette case upwards. 2. A receiving rib is formed in the cassette case, and immediately after the lock is released, the receiving rib abuts against the upper end portion of the lock releasing member and the cassette case is kept in a state of being moved upwards. The tape cassette according to claim 1, wherein: 3. The tape cassette according to claim 1, wherein the shutter is made of synthetic resin. 4. The tape cassette according to claim 1, wherein the shutter is made of metal.