JPH06162610A - Recording/reproducing apparatus - Google Patents

Abstract

PURPOSE:To move a reel stage to a predetermined position by the movement of a driving plate by providing the driving plate reciprocated linearly by a rack gear, gears having some teeth removed, a pair of reel stage arms and reels. CONSTITUTION:When a small cassette is used, a rack gear 29 and a driving plate 25 are moved right by a pinion 33. Fan-shaped gears 34, 34' are rotated in the counterclockwise direction by rack gears 30, 31, and reel stage arms 21, 21' are pressed via links 36, 36'. The arms 21, 21' are rotated in the opposite directions to be in touch with stoppers 39, 39' and held at a position fit for the small cassette. When a large cassette is to be used, the driving plate 25 is moved left. The fan-shaped gears 34, 34' are rotated in the clockwise direction by the rack gears 30, 31, and the arms 21, 21' are rotated in the opposite directions via the links 36, 36' into touch with sleeves outfitted with pins 35, 35'. As a result, the arms are kept at a position for the large cassette.

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 device. More specifically, the present invention aims to make a recording / reproducing device using tape cassettes of different sizes smaller and more cost-effective.

[0002]

2. Description of the Related Art A recording / reproducing apparatus using a tape cassette in which a tape reel around which a recording medium tape is wound is housed in a cassette case, that is, a tape recorder, selectively selects a plurality of tape cassettes of different sizes. There are some that can be used.

Since tape cassettes of different sizes usually have different axial distances between the two tape reels, a tape recorder using this type of tape uses the positions of two reel stands. It is movably provided so that it can be selectively changed according to the size of the cassette.

FIG. 7 shows an example of such a tape recorder a.
Is shown.

In the figure, b is an S-side reel base that is movably supported by guide shafts c and c, and d is a T-side reel base that is movably supported by other guide shafts e and e. An S-side reel stand f and a T-side reel stand g protruding upward are separately supported on the reel stand bases b and d, and motors h and h for rotating the reel stand are provided on the lower surface thereof. It is fixed separately.

The guide shafts c, c and e, e are arranged so as to extend toward the front side in a direction in which they are opened by approximately 90 °, whereby the reel stands f, g are indicated by two-dot chain lines. As shown, it is moved between a large cassette position where the axial distance between them is maximum and a small cassette position where the axial distance is minimum as shown by the solid line.

Reference characters i and i are foldable crank arms, and one end of one arm j, j is separately and rotatably provided at both left and right ends of a supporting member k fixed on a chassis (not shown). And the other end of the other arm 1, 1 whose one end is connected to the rotating end of the arm j, is connected to the reel bases b and d separately. Then, the one arm j, j is rotated by the drive gears m, m supported by the supporting member k, whereby the crank arms i, i are expanded and contracted to move the reel bases b, d.

[0008]

However, in the above-mentioned conventional tape recorder, the reel bases b and d are used.
Moves along the guide axes c, c, e, and e, but the number of parts is large and the positional accuracy of the reel bases f and g depends on the guide axes c, c, e, and e. The adjustment is difficult, and further, it is difficult to reduce the size and cost.

[0009]

In view of the above, the recording / reproducing apparatus of the present invention includes a drive plate which is formed with a first rack gear and second and third rack gears and which is linearly reciprocated by a drive means. A toothless gear that meshes with the second and third rack gears separately and is rotatably supported by the mechanical chassis, and a reel around which a recording medium tape is wound are mounted, and the reels on the supply side and the winding side are rotated. A pair of reel base arms, each of which has a base end rotatably supported by the mechanical chassis, and a pair of reel base arms, each of which is supported by a rotation end portion of the reel base and is spaced a predetermined distance from each other, A pair of link means connected to the reel base arm for transmitting the rotations of the pair of toothless gears to the pair of reel base arms and rotating the pair of reel base arms in opposite directions. ,Up By the movement of the drive plate is obtained so as to move the reel stand respectively the supply side and the take-up in place.

[0010]

Therefore, the recording / reproducing apparatus of the present invention does not require a guide shaft for guiding the reel base and can be arranged in a small space, and the mechanism is simple and compact. And cost reduction is possible.

[0011]

The details of the recording / reproducing apparatus of the present invention will be described below with reference to the illustrated embodiments.

In the illustrated embodiment, the present invention is applied to a video tape recorder.

Reference numeral 1 is a video tape recorder to which the present invention is applied.

First, two types of tape cassettes, large and small, used in the video tape recorder 1 will be described.

2 is a small tape cassette (see FIG. 2), and 3 is its cassette case (only the lower half is shown in the drawing). The cassette case 3 has a thin rectangular box shape that is long in the left-right direction when viewed from the thickness direction, and has tape outlets 4 and 4 formed at the left and right ends of the front surface of the cassette case 3. Of these, a portion 5 between the tape outlets 4 and 4 is a mouth portion that is open forward and downward. The mouse portion 5 is a portion into which a tape pull-out member, that is, a tape loading member is inserted when the tape cassette 2 is mounted on the video tape recorder 1, and is rotatably supported by the cassette case 3 (not shown). The front side is opened and closed by the lid.

6 is a supply-side tape reel (hereinafter referred to as "S reel"), and 6'is a take-up tape reel (hereinafter, referred to as "S reel").
Say "T reel". ), Which are rotatably housed in the cassette case 3 side by side. The tape reels 6, 6'include reel hubs 7, 7 each having a substantially cylindrical shape and flanges 8, 8, ... which laterally protrude from the upper and lower end portions of the reel hubs 7, 7, respectively. The lower end of 7 is arranged in a reel stand insertion hole (not shown) formed in the bottom plate 3a of the cassette case 3.

Reel hubs 7 and 7 are formed with reel base engaging holes 7a and 7a so as to open at their lower end surfaces.

Reference numeral 9 is a magnetic tape, both ends of which are fixed to the reel hubs 7 and wound by a predetermined amount.

Numerals 10 and 10 are in-cassette guides provided on the mouth portion 5 side of the tape outlets 4 and 4.

A part of the magnetic tape 9 is drawn out of the cassette case 3 through the tape outlets 4 and 4, and is wound around the cassette guides 10 and 10 when the tape cassette 2 is not in use. It hangs along the front of the department.

Reference numeral 11 is a large tape cassette (see FIG. 1), and 12 is its cassette case (only the lower half is shown in the drawing). The cassette case 12 is in the shape of a thin box having a rectangular shape that is long in the left-right direction when viewed from the thickness direction, and its left-right width and front-back width are considerably larger than those of the cassette case 3 of the small tape cassette 2. .

Tape outlets 13, 13 are formed at both left and right ends of the front face of the cassette case 12, and a portion 14 between the tape outlets 13 and 13 of the front face portion of the cassette case 12 is located at the front. It is a mouse part that opens downward. The mouse portion 14 is a portion into which a member for pulling out the tape is inserted when the tape cassette 11 is attached to the video tape recorder 1. This is also a lid body rotatably supported by the cassette case 12 (not shown). The front side is opened and closed by.

Reference numeral 15 is a supply-side tape reel (hereinafter referred to as "S reel"), and 15 'is a winding-side tape reel (hereinafter referred to as "T reel").
It is stored rotatably side by side in 2 inside.
These tape reels 15 and 15 'are reel hubs 16 and 16 having a substantially cylindrical shape, and flanges 17 and 17 protruding laterally from the upper and lower ends of the reel hubs 16 and 16 ,.
And the lower ends of the reel hubs 16 and 16 are arranged in a reel base insertion hole (not shown) formed in the bottom plate 12a of the cassette case 12.

Further, reel hubs 16 and 16 are provided with reel base engaging holes 16a and 16a which are opened at their lower end surfaces.

Reference numeral 18 is a magnetic tape, both ends of which are fixed to the reel hubs 16 and 16 and wound by a predetermined amount.

Numerals 19 and 19 are in-cassette guides provided on the side portions of the tape outlets 13 and 13 on the side of the mouth portion 14.

A part of the magnetic tape 18 is drawn out of the cassette case 12 from the tape outlets 13 and 13 and wound around the guides 19 and 19 in the cassette when the tape cassette 11 is not in use. It is laid along the front of 14.

Reference numeral 20 is a mechanical chassis of the video tape recorder 1.

Numerals 21 and 21 'are reel base arms, the base ends of which are rotatably supported by shaft support pins 22 and 22 at a position near the front side of the mechanical chassis 20, which is the base body, and are spaced apart from each other. Has been done. And reel stand arm 2
Reel bases 23 and 23 'are rotatably supported at the rotating ends of the reference numerals 1 and 21'. 23a and 23'a are reel stands 2
3, 23 ', which are reel engaging shafts projecting from the upper surface.

The reel base arms 21 and 21 'are rotated between the small cassette position shown in FIG. 2 and the large cassette position shown in FIG. When in the small cassette position, the axial distance between the reel stands 23 and 23 'is equal to the axial distance between the tape reels 6 and 6'of the small tape cassette 2,
Also, when in the large cassette position, the reel stands 23, 2
The axial distance of 3'is equal to the axial distance of the tape reels 15 and 15 'of the large tape cassette 11.

Reference numerals 24 and 24 denote reel stand motors, which are fixed to the lower surfaces of the reel stand arms 21 and 21 ', and the reel stand 2 is attached to the upper ends of the rotor shafts 24a and 24a.
3, 23 'are attached.

Reference numeral 25 denotes a drive plate that is long in the left-right direction, and is supported on the lower surface side of the mechanical chassis 20 near the front end so as to be slidable in the left-right direction. Reference numerals 26, 26 denote a left end of the rear edge of the drive plate 25 and a protrusion protruding rearward from the center. Sliding pins 27, 27 erected from the protrusions 26, 26 are provided at the front end of the mechanical chassis 20 in the left and right The drive plate 25 is slidably supported by the front end portion of the mechanical chassis 20 in the left-right direction by being slidably engaged with the sliding slits 28, 28 formed so as to extend.

At the rear edge of the drive plate 25, the first end is provided at the right end.
The second rack gear 30 is formed substantially adjacent to the left side of the first rack gear 29, and the third rack gear 31 is formed at the left end thereof.

Reference numeral 32 denotes a drive motor fixed to the lower surface of the right end portion of the front end portion of the mechanical chassis 20, and its output shaft 32a.
A pinion gear 33 is fixed to the pinion gear 33, and the pinion gear 33 is meshed with the first rack gear 29 of the drive plate 25.

Therefore, when the drive motor 32 is driven,
The drive plate 25 is moved leftward or rightward depending on the direction of the rotation.

34 and 34 'are fan-shaped gears rotatably supported on the lower surface of the mechanical chassis 20 by shaft support pins 35 and 35 behind the second and third rack gears 30 and 31 of the drive plate 25, respectively. The fan gear 34 is meshed with the third rack gear 31, and the fan gear 34 'is meshed with the second rack gear 30.

Therefore, when the drive plate 25 slides as described above, these fan-shaped gears 34, 34 'are rotated.

Incidentally, 35a, 35a are the shaft support pins 35,
35 is a sleeve that is fitted over the sleeve 35.

Reference numerals 36 and 36 'denote the fan gears 34 and 34'.
And the reel base arms 21 and 21 'for connecting the drive arms 37 and 37' to the drive link 3.
It consists of 8, 38 '.

The drive arms 37, 37 'are fan-shaped gears 34,
One end of each of drive links 38 and 38 'is rotatably connected to a tip end portion of the fan gear 34, 34' which is fixed to each of the fan gears 34, 34 '.

The other ends of the drive links 38, 38 'are rotatably connected to one side edge of the reel base arms 21, 21', respectively.

Numerals 39 and 39 'are stoppers, which are hung from the mechanical chassis 20 at an intermediate position between the rotating ends of the reel base arms 21 and 21'.

Reference numeral 40 denotes a head drum provided in the central portion of the mechanical chassis 20 in the left-right direction in the left-right direction. The head drum 40 has a fixed drum and a rotary drum, and a magnetic head (not shown) is supported on the rotary drum.

Reference numerals 41 and 41 'denote tape loading blocks, which have loading guides 42 and 42 and slant guides 43 and 43, respectively, and are used for the mechanical chassis 20.
It is moved along the guide grooves 44, 44 formed on the head drum 40, and is in the initial position shown by the two-dot chain line in FIGS. 1 and 2 in the initial state. It is moved to the completed loading position.

Reference numeral 45 denotes a capstan, which is rotated by a capstan motor 46 and projects above the mechanical chassis 20 at a position slightly separated to the right of the head drum 40.

Reference numeral 47 denotes a pinch roller arm, the base end portion of which is rotatably supported at a position closer to the right side on the far side from the center of the mechanical chassis 20. A pinch roller 48 is rotatably supported on the rotating end portion.
Then, the pinch roller arm 47 is located at the initial position shown by the two-dot chain line in FIGS. 1 and 2 in the initial state,
When reproducing or recording, the pinch roller 48 is moved to the pressure-bonding position where it is pressure-bonded to the capstan 45 via the magnetic tape 9 or 18 as shown by the solid line in the figure.

Reference numeral 49 denotes a tension regulator arm, which is rotatably supported at a position near one end of the tension regulator arm to the left of the center of the mechanical chassis 20 to the left. A tension pin 50 is erected on the other end of the tension regulator arm 49.

When the small tape cassette 2 is used, however, the drive motor 32 is driven and its output shaft 32 is driven.
The pinion gear 33 fixed to a is rotated counterclockwise as viewed from above, and the pinion gear 33 causes the first
The rack gear 29 is sent to the right and the drive plate 25 is moved to the right.

When the drive plate 25 moves to the right,
The fan gears 34 and 34 'are rotated counterclockwise by the second and third rack gears 30 and 31. When the sector gears 34, 34 'are rotated counterclockwise, the reel base arms 21, 21' are pressed via the link means 36, 36 ', and the reel base arms 21 move clockwise. The reel stand arm 21 'moves counterclockwise,
Each of them is rotated, and a portion of one side edge thereof near the rotation end abuts on the stoppers 39 and 39 ', and is held at the small cassette position.

When the large tape cassette 11 is used, the drive motor 32 is driven to output its output shaft 32a.
The pinion gear 33 fixed to is rotated clockwise when viewed from above, and the first rack gear 29 is sent to the left by the pinion gear 33 and the drive plate 25 is moved to the left.

When the drive plate 25 moves to the left,
The fan gears 34, 34 'are rotated clockwise by the second and third rack gears 30, 31. When the fan gears 34, 34 'are rotated clockwise, the reel stand arm 2 is moved through the link means 36, 36'.
1, 21 'are pressed, the reel base arm 21 is rotated in the counterclockwise direction, and the reel base arm 21' is rotated in the clockwise direction. The part of the other side edge near the rotation end is a fan gear. The sleeves 35a, 35a externally fitted to the shaft support pins 35, 35 of 34, 34 'are brought into contact with each other and held at the large cassette position.

[0052]

As is apparent from the above description, the recording / reproducing apparatus of the present invention has the first rack gear and the second rack gear.
A third rack gear is formed, and a drive plate linearly reciprocally moved by a drive means, and a toothless gear that meshes with the second and third rack gears separately and is rotatably supported by a mechanical chassis. A reel around which a recording medium tape is wound is mounted, and a reel stand on a supply side and a reel stand on which the reel is rotated are supported by respective rotating end portions, and are separated from each other by a predetermined distance, and a base end portion is provided on the mechanical chassis. A pair of rotatably supported reel base arms is connected between the pair of toothless gears and the pair of reel pedestal arms to rotate the pair of toothless gears to the pair of reel pedestal arms. A pair of link means for respectively transmitting the pair of reel base arms in opposite directions to each other, and moving the drive plate to move the supply side and take-up side reel bases to predetermined positions. It is characterized in.

Therefore, in the recording / reproducing apparatus of the present invention,
A guide shaft for guiding the reel base is not required, and the reel base can be arranged in a small space. Further, the mechanism is simple, and downsizing and cost reduction are possible.

The specific shapes and structures of the respective portions 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 construed in the open.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an example of an embodiment of a recording / reproducing apparatus of the present invention, showing a state in which a large tape cassette is mounted in 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 an enlarged plan view showing a main part at a large cassette position.

FIG. 4 is an enlarged plan view showing a main part at a small cassette position.

5 is an enlarged cross-sectional view taken along the line VV of FIG.

6 is an enlarged cross-sectional view taken along line VI-VI of FIG.

FIG. 7 is a schematic plan view showing an example of a conventional recording / reproducing apparatus.

[Explanation of symbols]

 1 recording / reproducing device 6, 6'reel 9 recording medium tape 15, 15 'reel 18 recording medium tape 20 mechanical chassis 21, 21' reel stand arm 23, 23 'reel stand 24 reel drive motor 25 drive plate 29 first rack gear 30 second rack gear 31 third rack gear 32 motor 32a motor drive shaft 33 gears 34, 34 'toothless gear 36, 36' link means 37, 37 'drive arm 38, 38' drive link

Claims (4)

[Claims] 1. A drive plate which is formed with a first rack gear and second and third rack gears and which is linearly reciprocated by a drive means, and is meshed with the second and third rack gears, respectively. A toothless gear rotatably supported on a mechanical chassis and a reel around which a recording medium tape is wound are mounted, and supply-side and take-up-side reel stands are respectively supported at rotating ends. A pair of reel base arms, which are rotatably supported by the mechanical chassis and are rotatably supported by a predetermined distance, are connected between the pair of toothless gears and the pair of reel base arms. A pair of link means for respectively transmitting the rotation of the toothed gear to the pair of reel base arms to rotate the pair of reel base arms in opposite directions, and by the movement of the drive plate, the supply side and the winding Side it A recording / reproducing apparatus characterized in that each reel stand is moved to a predetermined position. 2. The recording / reproducing apparatus according to claim 1, wherein the drive means is a motor having a gear whose drive shaft is meshed with the first rack gear. 3. The pair of linking means has a pair of drive arms fixed to the pair of toothless gears, and both ends of the pair of drive arms and the pair of reel base arms are rotatable. The recording / reproducing apparatus according to claim 1 or 2, comprising a pair of drive links connected to each other. 4. The supply side and take-up side reel bases attached to the pair of reel base arms respectively have reel drive motors. Recording / playback device.