JP3127637B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel recording / reproducing apparatus . More specifically, the cost of the recording / reproducing apparatus can be reduced, and reliable locking and unlocking of the reel can be realized.

[0002]

2. Description of the Related Art In a tape cassette in which a tape reel on which a recording medium tape is wound is housed in a cassette case in a rotatable manner, the tape reel is prevented from rotating when not in use to prevent the recording medium tape from loosening. A reel lock mechanism for locking is provided.

In such a reel lock mechanism, a reel lock member that moves between a lock position for locking the tape reel so as not to rotate and a lock release position for releasing the lock is disposed in the cassette case. In some cases, a reel unlocking member is moved to an unlocking position by inserting an unlocking member provided in a reproducing apparatus into a cassette case.

[0004]

Incidentally, there is a so-called compatible type recording / reproducing apparatus in which two types of tape cassettes having different sizes can be used as the recording / reproducing apparatus.

In a compatible recording / reproducing apparatus, the distance between the chassis surface and the bottom surface of the tape cassette when the tape cassette is mounted is large or small due to tape loading or other reasons. May be different.

In such a case, in order to unlock the tape reels of the tape cassettes having different sizes with a single unlocking member, the unlocking members must be moved three-dimensionally. There is a problem that the moving mechanism becomes complicated.

[0007] The size of the tape reel differs between the large tape cassette and the small tape cassette.
The size of the reel lock member must also be changed according to the size of the tape reel.

If the size of the reel lock member changes, the movement stroke for releasing the lock will also differ between large and small tape cassettes. Unless the shape of the lock release member is changed according to the large and small tape cassettes. No.

Under such circumstances, conventionally, it was impossible to unlock the tape reels of the large and small tape cassettes with a single unlocking member.

[0010]

In order to solve the above-mentioned problems, the recording / reproducing apparatus of the present invention has an unlocking member formed so as to be movable on a plane parallel to the chassis, and the unlocking member is mounted. The tape cassette is moved to an insertion position corresponding to the inserted tape cassette.

[0011]

[0012]

According to the present invention, a single unlocking member can be moved two-dimensionally to unlock the tape reels of the large and small tape cassettes, thus complicating the mechanism. Can be avoided.

[0013]

EXAMPLES Hereinafter, it will be described in accordance with the illustrated embodiment of the detail of the present invention the recording and reproducing apparatus.

First, the tape cassette will be described.

1 is a large tape cassette, and 2 is its cassette case.

The cassette case 2 is in the shape of a flat box having a horizontally-long rectangular shape when viewed from above, and tape outlets 3 and 3 'are formed at the left and right ends of the front surface thereof. ′, A mouth part 4 opened forward and downward is formed.

In the cassette case 2, tape reels 6 and 6 'on which both ends of a magnetic tape 5 are fixed and wound are rotatably housed.
Reel base engaging holes 7a, 7a opened at the lower ends of the hubs 7, 7 of 6 'are formed.
Reference numeral 7a faces the outside through a reel base insertion hole (not shown) formed in the bottom wall of the cassette case 2.

A part of the magnetic tape 5 is led out of the cassette case 2 from the tape outlets 3 and 3 ', and is located along the front surface of the mouth portion 4.

Reference numeral 8 denotes a reel lock member slidably disposed in the center of the rear end of the cassette case 2 in the front-rear direction. The slide lock 9 has a substantially square block shape and a front end of the slide 9. And engagement pieces 10, 10 'projecting obliquely forward from the surface so that their front ends are separated from each other.

The sliding portion 9 has a concave portion 11 opened on the lower surface thereof.
A portion of the rear surface of the concave portion 11 except for the lower end portion is a substantially vertical vertical portion 12a, and the lower end portion following the vertical portion 12a is a rearwardly inclined slope portion 12b.

Reference numerals 13, 13 stand upright from the bottom wall 2a at the center of the rear end of the cassette case 2, and are separated from each other to the left and right and extend in parallel in the front-rear direction.
3 is a sliding space in which the sliding portion 9 of the reel lock member 8 slides.

In the bottom wall 2a of the cassette case 2, an insertion hole 14 is formed in a portion of the bottom wall 2a between the standing walls 13 for allowing a lock release member to be described later to be inserted into the cassette case 2. ing.

Reference numeral 15 denotes a coil spring, which is provided between the rear end face of the sliding portion 9 of the reel lock member 8 and the cassette case 2.
In this state, the reel lock member 8 is urged forward by a moving force, and is not receiving the moving force toward the rear. , The front ends of the engagement pieces 10, 10 'are the tape reel 6,
, 17 ', 17',... Formed on the peripheral edge of the lower flanges 16, 16 'of the 6', and the tape reels 6, 6 'rotate. Not locked this up.

In addition, a front lid for opening and closing the front surface of the magnetic tape 5 rotatably supported on the front surface of the cassette case 2 and extending along the front surface of the cassette case 2 is provided. , And their illustration and description are omitted.

Reference numeral 18 denotes a small tape cassette, and reference numeral 19 denotes a cassette case.

The cassette case 19 has a flat rectangular box shape which is considerably smaller than the cassette case 2 of the large tape cassette 1 when viewed from above.
0, 20 ', a mouse section 21, etc., and tape reels 23, 23' around which a magnetic tape 22 is wound are housed therein. 24, 24 are tape reels 23,
23 'hubs, 24a and 24a are reel base engaging holes opened at the lower ends of the hubs 24 and 24. These reel base engaging holes 24a and 24a are the reel bases of the tape reels 6 and 6' of the large tape cassette 1. It has substantially the same size as the engagement holes 7a, 7a.

Reference numeral 25 denotes a reel lock member which is slidably disposed in the center of the rear end of the cassette case 19 in the front-rear direction.
6 has engaging pieces 27 and 27 'projecting obliquely forward from the front end face so that their front ends are separated from each other.

The sliding portion 26 has a concave portion 2 opened on the lower surface thereof.
8 is formed, and the rear surface of the concave portion 28 except for the lower end portion is a substantially vertical portion 29a, and the lower end portion following the vertical portion 29a is a rearwardly inclined slope portion 29b.

Numerals 30 and 30 stand upright from the bottom wall 19a at the center of the rear end of the cassette case 19, and are vertically separated from each other and extend in parallel in the front-rear direction.
Is a sliding space in which the sliding portion 26 of the reel lock member 25 slides.

Then, the bottom wall 19 of the cassette case 19
An insertion hole 31 for inserting a lock release member, which will be described later, into the cassette case 19 is formed in a portion of the portion a located between the standing walls 30.

Reference numeral 32 denotes a coil spring, which is contracted between the rear end surface of the sliding portion 26 of the reel lock member 25 and the inner surface of the rear wall 19b of the cassette case 19.
As a result, a forward moving force is urged to the reel lock member 25, and in a state where the rearward moving force is not received, the front ends of the engaging pieces 27, 27 ' , 34 ', 3' formed on the periphery of the lower flanges 33, 33 'of 23'.
4 'are locked so that the tape reels 23 and 23' do not rotate.

In addition, a front lid or the like is provided for opening and closing the front surface of the magnetic tape 22 rotatably supported on the front surface of the cassette case 19 and extending along the front surface of the cassette case 19. , And their illustration and description are omitted.

Reference numeral 35 denotes a video tape recorder, which is a so-called compatible type which can use the two types of tape cassettes 1 and 18 of the above-mentioned size.

Reference numerals 36 and 36 'denote reel base arms, the base ends of which are rotatably supported at a position slightly closer to the front side of a mechanical chassis 37 serving as a base, with a slight left and right distance therebetween. Reel stands 38, 38 'are rotatably supported at the rotating ends of the reel stand arms 36, 36'.

38a, 38'a are reel stands 38, 38 '
Is a reel engagement shaft protruding from the upper surface of the reel. A brake drum 38 'is provided at the lower end of the supply-side reel base 38'.
b is formed.

Then, the reel base arms 36 and 36 'are rotated between the small cassette position shown in FIG. 2 and the large cassette position shown in FIG. When the small cassette is in the small cassette position, the center distance between the reel stands 38 and 38 'is equal to the center distance between the tape reels 23 and 23' of the small tape cassette 18, and
When the cassette is at the large cassette position, the reel tables 38 and 38 '
The distance between the axes of the tape reel 6 of the large tape cassette 1,
It is equal to the interaxial distance 6 '.

Reference numerals 39 and 39 'denote pull-out arms, one end of which is rotatably supported by a mechanical chassis 37, and the pull-out guides 40 and 40' are provided upright at the other ends. Then, until the tape cassette 1 or 18 is mounted,
That is, in the initial state, the magnetic tape 5 or 22 is located at the initial position shown by a two-dot chain line in FIGS. 1 and 2 and when the magnetic tape 5 or 22 is pulled out from the cassette case 2 or 19 and wound around the head drum, the tape loading shown in FIG. When the reel base arms 36, 36 'are in the small cassette position, they rotate to the first pull-out position shown in the figure, and the reel base arms 36, 36' are in the large cassette position as shown in FIG. At this time, the pull-out arm 39 on the tape take-up side rotates to the second pull-out position shown in FIG.
9 'pivots to the same withdrawal position shown in FIGS.

That is, the pull-out arm 39 'on the tape supply side rotates to the same position regardless of whether the large tape cassette is used or the small tape cassette is used. Therefore, the position of the pull-out guide 40 'on the tape supply side when the tape runs is always the same.

Reference numeral 41 denotes a head drum provided at a substantially central portion in the left-right direction on the back side of the mechanical chassis 37, has a fixed drum and a rotating drum, and a magnetic head (not shown) is supported on the rotating drum.

Reference numerals 42, 42 denote tape loading blocks, which have loading guides 43, 43 and inclined guides 44, 44, respectively, and are moved along guide grooves 45, 45 formed in the mechanical chassis 37. In the initial state, the head drum 41 is at an initial position indicated by a two-dot chain line in FIGS. 1 and 2, and is moved to a loading completion position located slightly deeper on both sides of the head drum 41 during tape loading.

Reference numeral 46 denotes a capstan, which is rotated by a capstan motor 47 and protrudes above the mechanical chassis 37 at a position slightly separated to the right of the head drum 41.

Reference numeral 48 denotes a pinch roller arm, the base end of which is rotatably supported at a position slightly closer to the right side than the center of the mechanical chassis 37. A pinch roller 49 is rotatably supported at the rotating end.
In the initial state, the pinch roller arm 48 is located at an initial position shown by a two-dot chain line in FIGS.
When performing reproduction or recording, the pinch roller 49 is moved to the crimping position where the pinch roller 49 is crimped to the capstan 46 via the magnetic tape 5 or 22 as shown by a solid line in FIG.

Reference numeral 50 denotes a tension regulator arm, which is rotatably supported at a position somewhat closer to the other end than one end to a position slightly closer to the left side than the center of the mechanical chassis 37. A tension pin 51 is provided upright at the other end of the tension regulator arm 50.

In the initial state, the tension regulator arm 50 is locked at a standby position extending substantially straight in the front-rear direction. The lock is released at the time of operation during reproduction or recording, and is released by a resilient means (not shown). The magnetic tape 5 or 22 is rotated from the outside in a clockwise direction by the biasing moving force so as to resiliently contact the portion between the left pull-out guide 40 ′ and the loading guide 43 of the magnetic tape 5 or 22 from the outside. become.

Reference numeral 52 denotes a band-like brake band.
One end is supported by a support 53 near the left end of the center of the mechanical chassis 37, and the other end is supported by a support 54 at one end of the tension regulator arm 50. The middle part of the brake band 52 is wound around the brake drum 38'b of the reel base 38 'on the supply side.

When the tape cassette 1 or 18 is mounted at the cassette mounting position of the video tape recorder 35, the pull-out guides 40 and 40 ', the loading guides 43 and 43, the inclined guides 44 and 44, the pinch rollers at the initial positions. 48 is relatively inserted into the mouth part 4 or 21 of the tape cassette 1 or 18. When the large tape cassette 1 is mounted, the reel base 3 at the large cassette position
8, 38 'are engaged with the reel base engaging holes 7a, 7a of the tape reels 6, 6'.
When the small tape cassette 18 is mounted, the reel engaging shafts 38a of the reel tables 38, 38 'at the small cassette position,
38'a is engaged with the reel stand engaging holes 24a, 24a of the tape reels 23, 23 '.

Then, the tape loading block 4
2 and 42 are moved to the loading completion position, the tape supply side pull-out guide 40 'is at a predetermined position shown in FIGS.
1 is used, and when the small tape cassette 18 is used, it is moved to the first position shown in FIG. 2, whereby the magnetic tape 5 or 22 is moved.
Is passed through a predetermined tape path.

When reproduction or recording is performed, the pinch roller 49 is pressed against the capstan 46 with the magnetic tape 5 or 22 interposed therebetween, and the lock of the tension regulator arm 50 to the standby position is released.
1 is elastically contacted to the magnetic tape 5 or 22 from the outside.

When the tension of the magnetic tape 5 or 22 on the supply side with respect to the head drum 41 becomes smaller, the tension regulator arm 50 rotates clockwise as viewed from above, and its one end 54 (supporting portion of the brake band 52). Moves away from the reel base 38 ', the brake band 52 tightens the brake drum 38'b of the reel base 38', and the magnetic tape 5
Or the tension of 22 is increased.

When the tension of the magnetic tape 5 or 22 on the supply side from the head drum 41 is increased, the tension regulator arm 50 rotates counterclockwise as viewed from above, and one end 54 thereof approaches the reel base 38 '. To the reel base 3 of the brake band 52
The tightening of the 8 'on the brake drum 38'b is weakened, thereby reducing the tension of the magnetic tape 5 or 22.

Reference numeral 55 denotes a movable plate supported on the mechanical chassis 37 so as to be movable in the front-rear direction, and has guided grooves 56, 56, 56 extending in the front-rear direction. The guide pins 57, 57, 57 erected on the mechanical chassis 37 are slidably engaged with 56, so that the mechanical pins 37 are movably supported in the front-rear direction by the mechanical chassis 37.

A rack gear 58 is formed on one of the two side edges of the moving plate 55 extending in the front-rear direction, and a pinion gear fixed to an output shaft 59 a of a motor 59 with a reduction gear fixed to the mechanical chassis 37. 60 is meshed with the rack gear 58 of the moving plate 55.

Accordingly, when the motor 59 rotates, the rack gear 5 is rotated by the pinion gear 60 which rotates.
8, the moving plate 55 is moved in a direction corresponding to the rotation direction of the motor 59.

Reference numeral 61 denotes a lock release member provided upright on the moving plate 55.

The lock releasing member 61 has a slightly thick plate shape in the width direction along the front-rear direction, and the front-rear width of the upper end 61a is smaller than the front-rear width of the other portion 61b.
The rear edge of the upper end 61a is located on the same plane as the rear edge of the other portion 61b.

At the upper end of the upper end portion 61a, a slope portion 62a is formed which descends forward, and a vertical portion 62b is formed following the slope portion 62a.

At the upper end of the other portion 61b, a slope 63a is formed which is continuous with the vertical portion 62b and descends forward, and a vertical portion 63b is formed following the slope 63a.

On the mechanical chassis 37, a detection switch 64a pressed by the bottom surface of the small tape cassette 18 and the large tape cassette 1 mounted at the cassette mounting position and a detection switch 64b pressed only by the bottom surface of the large tape cassette 1 are provided. These detection switches 6
The detection signals from 4a and 64b are input to the microcomputer 65, and the microcomputer 65, which determines whether the tape cassette to be mounted is large or small, controls the driver 66 to drive the motor 59 to mount the moving plate 55. Is moved to a predetermined position corresponding to the tape cassette 1 or 18 to be moved.

FIGS. 5 to 7 are for explaining the reel unlocking operation when the large tape cassette 1 is mounted.

When the large tape cassette 1 is loaded,
The moving plate 55 moves so that the unlocking member 61 mounted on the moving plate 55 is located at a position corresponding to the insertion hole 14 of the large tape cassette 1.

When the large tape cassette 1 descends to the cassette mounting position, first, the unlocking member 61
Is inserted into the cassette case 2 through the insertion hole 14, the upper slope portion 62a contacts the slope portion 12b of the reel lock member 8 (see FIG. 5), and the tape cassette 1 further descends from there. Since this is pressed substantially rearward, the reel lock member 8 is moved rearward against the resilience of the coil spring 15 and its vertical portion 1
2a comes into contact with the vertical portion 62b of the unlocking member 61 (see FIG. 6).

When the tape cassette 1 further descends, the slope 12b of the reel lock member 8 comes into contact with the lower slope 63a of the unlocking member 61 (see FIG. 6). When the slope 12b is pressed, the reel lock member 8 is further moved rearward,
Eventually, the lock reaches the unlock position, and the vertical portion 12a contacts the lower vertical portion 63b of the unlock member 61 and is held at the unlock position (see FIG. 7).

FIGS. 8 and 9 are for explaining the reel unlocking operation when the small tape cassette 18 is mounted. The mounting position of the small tape cassette 18 is higher than the mounting position of the large tape cassette 1.

When the small tape cassette 18 is mounted, the moving plate 55 is moved to the unlocking member 61 mounted thereon.
Is moved to a position corresponding to the insertion hole 31 of the small tape cassette 18.

When the small tape cassette 18 descends to the cassette mounting position, first, the lock release member 6
1 is inserted into the cassette case 19 through the insertion hole 31, and the upper slope portion 62 a is inserted into the reel lock member 25.
(See FIG. 8), and when the tape cassette 18 further descends, it is pressed substantially rearward, so that the reel lock member 25 resists the elastic force of the coil spring 32. The vertical portion 29a is moved to the rear unlocking position,
The first vertical portion 62b abuts and is held at the unlocked position (see FIG. 9).

[0066]

As is apparent from the above description, the recording / reproducing apparatus of the present invention comprises a cassette case in which a tape reel on which a recording medium tape is wound is rotatably housed and a lock for locking the tape reel. A reel lock member is provided movably between a position and an unlock position for releasing the lock, and the unlock member provided in the recording / reproducing apparatus is inserted into the cassette case to press the reel lock member. What is claimed is: 1. A recording / reproducing apparatus which can use tape cassettes of different sizes, wherein a reel lock member is moved to an unlock position, wherein the unlock member is movable on a plane parallel to a chassis. The lock release member is formed and moved to an insertion position corresponding to the mounted tape cassette.

[0067]

Accordingly, in the present invention, the single reel unlocking member can be moved two-dimensionally to unlock the tape reels of the large and small tape cassettes, and the mechanism becomes complicated. Can be avoided.

It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiment for carrying out the present invention, and the technical scope of the present invention is thereby reduced. It should not be interpreted restrictively.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an embodiment of a recording / reproducing apparatus according to the present invention, showing a state in which a large tape cassette is mounted and a horizontal section of the large tape cassette.

FIG. 2 is a schematic plan view showing a state in which the small tape cassette is mounted in a horizontal cross section of the small tape cassette.

FIG. 3 is a schematic plan view showing a main part.

FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is an enlarged sectional view of a main part showing an unlocking operation when a large tape cassette is mounted.

FIG. 6 is an enlarged cross-sectional view of a main part showing an operation subsequent to FIG. 5;

FIG. 7 is an enlarged sectional view of a main part showing an operation following FIG. 6;

FIG. 8 is an enlarged sectional view of a main part showing an unlocking operation when a small tape cassette is mounted.

FIG. 9 is an enlarged cross-sectional view of a main part showing an operation subsequent to FIG. 8;

FIG. 10 is a schematic plan view in which two large and small tape cassettes are mounted in an overlapping manner.

[Explanation of symbols]

 Reference Signs List 1 Large tape cassette 2 Cassette case 5 Recording medium tape 6, 6 'Tape reel 8 Reel lock member 12a Vertical portion 18 Small tape cassette 19 Cassette case 22 Recording medium tape 23, 23' Tape reel 25 Reel lock member 29a Vertical portion 35 Recording Playback device 37 Chassis 61 Unlocking member 62a Slope portion 62b Vertical portion 63a Slope portion 63b Vertical portion

Claims (3)

(57) [Claims] A tape reel having a recording medium tape wound thereon is rotatably stored in a cassette case, and is movably movable between a lock position for locking the tape reel and an unlock position for releasing the lock. A lock member is provided, and a lock release member provided in the recording / reproducing apparatus is inserted into the cassette case, and the reel lock member is moved to the lock release position by pressing the reel lock member. A recording / reproducing apparatus capable of using different tape cassettes, wherein the unlocking member is formed so as to be movable on a plane parallel to the chassis,
A recording / reproducing apparatus wherein the lock releasing member is moved to an insertion position corresponding to the mounted tape cassette. 2. The recording / reproducing apparatus according to claim 1, wherein the smaller tape cassette, ie, the small tape cassette, is mounted at a position higher than the larger tape cassette, ie, the large tape cassette. 3. The unlocking member is formed with two inclined surfaces and two vertical portions. One vertical portion unlocks the small tape cassette and the other vertical portion unlocks the large tape cassette. 3. The recording / reproducing apparatus according to claim 2, wherein the apparatus is used for: