JPH0636397A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the number of parts and cost and to eliminate the malfunction of a reel base by moving the reel base whose position is to be changed according to the size of a tape cassette to be used by means of a motor for driving the reel base. CONSTITUTION:A reel base driving motor 26 is fixed to a reel base support arm 23 supported to rotate freely on a chassis 17 and a reel base 13 is connected to a rotary shaft 27. A gear train 37 having a clutch gear 30 to be freely movable in the vertical direction is provided on a reel base supporting arm. A gear 35 at the final stage of a gear train 37 is made a fixed gear and the clutch gear is engaged with an output gear 28 fixed to the rotary shaft and a second gear 31 when tape cassettes 2 or 3 is not loaded. By rotating the reel base driving motor in this state, the reel base supporting arm is rotated to change the position of the reel base. When the tape cassette is loaded, the clutch gear is separated from the gears at the front and rear stages and a lock pin 38 supported by the reel base supporting arm is inserted into a lock hole 19 or 20 of the chassis to prevent the reel base supporting arm from moving.

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 relates to a recording / reproducing device that changes the position of the reel stand according to the size of the tape cassette used, and the reel stand can be moved without providing a dedicated motor for moving the reel stand. It is an object of the present invention to provide a novel recording / reproducing apparatus that can reduce the number of parts and cost and can easily configure a structure that prevents malfunction of the movement.

[0002]

2. Description of the Related Art Some recording / reproducing apparatuses using a tape as a recording medium allow a plurality of tape cassettes having different sizes to be selectively used.

Tape cassettes of different sizes are usually
Since the axial distances between the two tape reels are different, in this type of tape player, the positions of the two reel stands can be selectively changed according to the size of the tape cassette used. It is like this.

FIG. 8 shows an example a of a conventional reel base moving mechanism provided in such a recording / reproducing apparatus.

In the figure, b and b are reel base support arms, which are horizontally rotatable about support shafts d and d which are erected on the chassis c and whose rear ends are separated from each other in the left-right direction. Is supported.

Reference numerals e, e denote reel stands, which are rotatably supported by the wide portions of the reel stand supporting arms b, b on the side of the pivoting end while protruding upward.

Reference numerals f, f denote reel stand driving motors fixed to the lower surfaces of the reel stand supporting arms b, b, and the reel stands e, e are individually rotated by these motors f, f.

Reference numeral g denotes a substantially T-shaped pressing lever, which is moved forward and backward by the guide shafts h, h, h, ..., etc. provided on the chassis c, that is, a forward position indicated by a solid line and a two-dot chain line. A rack i is movably supported between the retracted position shown in the figure and a rack i is formed on the left edge of the part extending in the front-rear direction, and long holes j, j elongated in the left-right direction are formed at both ends of the part extending in the left-right direction. Has been formed.

Reference numeral k denotes a reel stand moving motor fixed to the lower surface of the chassis c, and a pinion gear m fixed to the upper end of a rotary shaft l thereof meshes with the rack i.

Depressed pins n, n are erected on the side ends of the reel base support arms b, b on the side closer to each other, and these depressed pins n, n are provided in the long holes j, j of the pressing lever g. Each of them is slidably inserted.

Then, when the reel stand moving motor k rotates, the pinion gear m sends the rack i forward and backward, so that the pressing lever g is moved forward and backward.
The inner edge of the elongated hole j of the pressing lever g, the pressed pin n,
Since n is pressed forward or backward, the reel base support arms b, b are rotated in directions opposite to each other.

The reel base supporting arms b, b are
As shown by the solid line, it moves between a large cassette position where the inter-axis distance between the reel stands e is maximum and the small cassette position where the inter-axis distance is minimum as shown by the two-dot chain line. To be done.

[0013]

However, in the reel base moving mechanism a having such a structure, since the reel base supporting arms b and b are rotated by the dedicated motor k, the cost is reduced. In addition to being high in weight and requiring a space for arranging a dedicated motor k and the like, there is a problem that the entire apparatus becomes large.

Further, according to such a mechanism, if the motor k is erroneously rotated for some reason such as a malfunction of the circuit, the reel bases e, e may try to move to an unexpected timing or to an unexpected position. There is a problem that there is

Particularly, when such a malfunction occurs while the tape cassette is mounted, an unreasonable force is applied to the reel stand or the tape reel, so that the reel stand or the tape reel may be damaged or the reel stand may be damaged. This will cause a serious failure such as bending of the shaft.

[0016]

Therefore, in order to solve the above-mentioned problems, the recording / reproducing apparatus of the present invention is a reel in which a reel base whose position is changed according to the size of a tape cassette to be used is rotatably supported. The base supporting arm is rotatably supported on the chassis, the reel base driving motor is fixed to the reel base supporting arm, and the reel base supporting arm is rotated by the rotation of the reel base driving motor to change the position of the reel base. And a switching means for selectively switching between a functioning state and a non-functioning state of the reel stand moving means.

[0017]

Therefore, in the recording / reproducing apparatus of the present invention, since the reel base can be moved by utilizing the motor for rotating the reel base, the motor dedicated for moving the reel base can be omitted. Therefore, the cost can be reduced and the device can be downsized.

Further, by using mechanical switching means for switching between a state in which the reel base moving means for moving the reel base functions and a state in which the reel base moving means does not function, there is a fear that the reel base moving means may operate due to a malfunction. You can leave it out.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the recording / reproducing apparatus of the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

The embodiment shown in the drawings is an application of the present invention to a video tape player 1.

First, two types of tape cassettes, large and small, used in the video tape player 1 will be described (see FIG. 1).

Reference numeral 2 is a large large tape cassette, and 3 is a small small tape cassette.

Reference numeral 4 denotes a cassette case of the large tape cassette 2, which has a thin box-like shape having a long rectangle in the left-right direction when viewed from the thickness direction, and tape outlets 5, 5 are formed at both left and right ends of the front surface. In addition, a portion 6 between the tape outlets 5 and 5 on the front surface of the cassette case 4 is a mouth portion that is open forward and downward.

When the directions of the tape cassettes 2 and 3 are shown, the upward direction in FIG. 1 is the front side, and the downward direction is the rear side.

The mouse portion 6 is a portion for inserting a tape pull-out member, that is, a tape loading member when the tape cassette 2 is mounted on the video tape player 1.

Reference numerals 7 and 7 denote tape reels (only a reel hub is shown in the drawing), which are rotatably accommodated in the cassette case 4 in a state of being arranged side by side.

Reference numeral 8 is a magnetic tape, both ends of which are fixed to the tape reels 7 and wound by a predetermined amount.

Reference numerals 9 and 9 denote in-cassette guides rotatably supported by the tape outlets 5 and 5.

A part of the magnetic tape 8 is the tape outlet 5,
When the tape cassette 2 is not in use, this portion is extended from the cassette case 4 along the front surface of the mouse portion 5 as indicated by a chain double-dashed line.

The basic structure of the small tape cassette 3 is the same as that of the large tape cassette 2 except that the size of each part and the axial distance between two tape reels are smaller than those of the large tape cassette 2. Therefore, a description of the same parts in the large tape cassette 2 will be omitted by affixing the reference signs with "'" to the respective parts.

Next, an outline of the video tape player 1 will be described (see FIG. 1).

Regarding the direction of the video tape player 1, the upward direction in FIG. 1 is the rear side, and the downward direction is the front side, as opposed to the directions in the tape cassettes 2 and 3. .

A mechanical chassis 10 of the video player 1 is provided with a head drum 11 having a rotary magnetic head (not shown) at its rear end and a capstan 12 at a position on the substantially right side thereof.

Numerals 13 and 13 'are reel stands supported by a rotatable reel stand supporting arm which will be described later, and their positions are changed when the large tape cassette 2 is used and when the small tape cassette 3 is used. It has become so.

That is, in the reel bases 13 and 13 ', the positions for large cassettes where the axial distance between them is maximized as shown by the solid line and the axial distance is minimized as shown by the chain double-dashed line. It is moved to and from the small cassette position.

The axial distance between the reel bases 13 and 13 'is the axial distance between the two tape reels 7 of the large tape cassette 2 when the reel bases 13 and 13' are in the large cassette position. Match the distance and also reel stand 13, 1
When the 3'is in the small cassette position, the distance between the two tape reels 7'and 7'of the small tape cassette 3 coincides with the axial distance (see FIG. 1).

14 and 14 are tape loading guides,
Reference numeral 15 is a pinch roller, and these tape loading guides 14 and 14 and the pinch roller 15 are held at the initial position indicated by the chain double-dashed line in the initial state until the tape cassette 2 or 3 is mounted (see FIG. 1). ).

When the tape loading is started, the tape loading guides 14 and 14 are moved to the loading completion position shown by the solid line, and the pinch roller 15 is moved to the standby position close to the capstan 12.

A space above the head drum 11 of the mechanical chassis 10 is a cassette mounting portion.
The tape cassette 2 or 3 is removably mounted in the cassette mounting portion, and the mounting is performed in a horizontal posture in which the front surfaces of the cassette cases 4 and 4 ′ face the head drum 11 side.

Then, when the tape cassette 2 or 3 is mounted in the cassette mounting portion, the left reel stand 13 (hereinafter,
It is called "S side reel stand". ) Is engaged with the left tape reel 7 or 7 ', and the right reel stand 13' (hereinafter referred to as "T side reel stand") is engaged with the right tape reel 7 or 7 ', respectively. The tape loading guides 14, 14 and the pinch roller 15 are provided on the portion 6 or 6 '.
Is relatively inserted.

When the tape loading is started from this state, the tape loading guides 14 and 14 are moved to the loading completion positions slightly recessed from the positions on the left and right sides of the head drum 11, whereby the magnetic tape 8 or 8'is pulled out from the cassette case 4 or 4 ', and a part of the 8'is passed through a predetermined path wound around the outer peripheral surface of the head drum 11.

When recording or reproducing, the pinch roller 15 moves the magnetic tape 8 or 8'from the above state.
It is crimped to the capstan 12 by sandwiching it.

Reference numeral 16 is a reel base moving mechanism provided with the reel bases 13 and 13 '.

Reference numeral 17 denotes a sub-chassis which is a base of the reel base moving mechanism 16 and which is substantially T-shaped when viewed from above. The front and rear widths of both end portions of a portion 17a extending in the left-right direction are slightly larger than those of other portions. Arm support shafts 18, 18 are erected on these ends.

A portion 17b extending in the front-rear direction of the sub-chassis 17 is formed such that the tip portion thereof has a substantially triangular shape with a forward spread, and two relatively small circular shapes are formed at the left and right ends of the front end portion of the portion 17b. The lock holes 19 and 19 are formed, and the other lock holes 20 and 20 are formed at positions appropriately separated from the lock holes 19 and 19 along the left and right edges of the portion 17b.

The left lock holes 19 and 20 are formed on one circumference centering on the left arm support shaft 18,
The right lock holes 19 and 20 are formed on one circumference centering on the right arm support shaft 18, and the left lock holes 19 and 20 and the right lock holes 19 and 20 are symmetrical positions. Is formed in.

Reference numeral 21 denotes a cassette mounting plate disposed above the sub-chassis 17 in parallel with and facing the sub-chassis 17, and the tape cassette 2 or 3 is detachably mounted on the upper surface of the cassette mounting plate 21. It is placed (see FIGS. 5, 6, and 7).

22 and 22 'are reel base blocks.

Incidentally, these reel base blocks 22, 22 '.
Since there is no difference other than that it has a bilaterally symmetric structure, its structure will be described only for the left reel base block 22 (hereinafter, referred to as "S side reel base block"). Right reel stand block 22
′ (Hereinafter, referred to as “T-side reel base block”), the description thereof will be omitted by assigning the same reference numerals to the same portions in the S-side reel base block 22 as the respective portions.

The reference numeral 23 designates a reel base support arm which is in the form of a flat plate which is long in the front-rear direction, and its rear end portion 24 is bent so as to form a substantially U-shape open to the front when viewed from the left-right direction, and is from above. The position near the front end of the overlapping portion of the bent portion and the unfolded portion is supported by the arm support shaft 18, whereby the reel base support arm 23 is horizontally moved with respect to the sub chassis 17. It is rotatably supported.

Reference numeral 25 denotes a projecting portion projecting forward from the right end portion of the front end edge of the reel stand supporting arm 23.
Is positioned so as to overlap with the left side edge of the portion 17b extending in the front-rear direction of the sub-chassis 17 from above, and an insertion hole 25a is formed at a substantially central portion thereof.

Reference numeral 26 is a reel stand drive motor fixed to the lower surface of the reel stand support arm 23, and its rotation shaft 27 penetrates through the substantially central portion of the reel stand support arm 23 and is projected upward. Of the reel stand supporting arm 23 protrudes upward from the cassette placing plate 21 through a long hole 21a formed in the cassette placing plate 21, and the S-side reel stand 13 is attached to the upper end of the rotary shaft 27. Are combined.

The elongated hole 21a of the cassette mounting plate 21 is formed in an arc shape around the position corresponding to the arm support shaft 18 when viewed from above, and the elongated hole 21a is formed in accordance with the rotation of the reel stand supporting arm 23. The rotary shaft 27 can be moved inside.

28 is the cassette mounting plate 2 of the rotary shaft 27.
The output gear is fixed at a position slightly lower than 1.

Reference numeral 29 denotes a gear support shaft standing on the left side of the rotary shaft 27 of the reel base support arm 23, and a clutch gear 30 is supported on the gear support shaft 29.

Reference numeral 31 is a first reduction gear in which two large and small gear portions 31a and 31b are integrally formed, and 32 is a second reduction gear in which two large and small gear portions 32a and 32b are integrally formed. The reduction gears 31 and 32 are separately and rotatably supported by gear support shafts 33 and 34 provided upright on the reel base support arm 23. The large gear portion 31a of the first reduction gear 31 is It is located at approximately the same height as the output gear 28 fixed to the rotary shaft 27, and the small gear portion 3
1b and the large gear portion 32a of the second reduction gear 32 are meshed with each other.

A fixed gear 35 is fixed to the left arm support shaft 18, and the small gear portion 32b of the second reduction gear 32 is meshed with the fixed gear 35.

The clutch gear 30 is composed of a substantially cylindrical shaft portion 30a having an opened lower end surface and a gear portion 30b formed at the lower end portion of the shaft portion 30a.

Such a clutch gear 30 has a shaft portion 30a.
The gear support shaft 29 is inserted into the gear support shaft 29 so that the gear support shaft 29 is rotatably supported in the vertical direction.

Reference numeral 36 is a coil spring externally fitted to the gear support shaft 29, and is contracted between the lower end surface of the clutch gear 30 and the upper surface of the reel base support arm 23. Therefore, the clutch gear 30 is a coil spring. The upward movement force is urged by the elastic force of 36.

Reference numeral 21b is an arc-shaped elongated hole formed in the cassette mounting plate 21 at a position corresponding to the movement locus of the gear support shaft 29, and the shaft portion 30a of the clutch gear 30.
Is slidably inserted in the long hole 21b.

As a result, when the clutch gear 30 is not pressed downward, as shown in FIGS. 5 and 7, the position where the gear portion 30b abuts the lower surface of the cassette mounting plate 21 (hereinafter, referred to as In this state, the gear portion 30b meshes with the output gear 28 and the large gear portion 31a of the first reduction gear 31, and also the shaft portion 30a of the clutch gear 30. The front end of the is projected upward from the cassette mounting plate 21.

A gear train 37 composed of the output gear 28, the clutch gear 30, the reduction gears 31, 32, and the fixed gear 35 constitutes a reel stand moving means, and the reel stand supporting arm 23 is rotated by this rotation. It is performed by the gear train 37 and the reel base drive motor 26.

That is, when the reel base drive motor 26 rotates while the clutch gear 30 is in the meshing position, the rotation thereof causes the output gear 28, the clutch gear 30, the first reduction gear 31, and the second reduction gear 32 to rotate. Is applied to the fixed gear 35 via the, and the fixed gear 35 cannot rotate, so that the rotational force of the reel base drive motor 26 acts as a moving force for moving itself.

When the reel base drive motor 26 rotates with the clutch gear 30 in the meshing position, the reel base support arm 23 rotates about the arm support shaft 18 in the direction corresponding to the rotation direction. Be moved.

Such reel stand supporting arms 23, 23
Is performed between the first position shown in FIG. 2 and the second position shown in FIG. 3, and the reel base support arms 23, 23 move to the first position.
To the position of the reel stand 13, 13 '
Is positioned at the large cassette position, and the reel base support arms 23, 23 are moved to the second position to position the reel bases 13, 13 'at the small cassette position.

The clutch gear 30 is mounted on the tape cassette 2 or 3 so that the output gear 28 and the first gear
Is moved to the disengaged position where the meshing with the reduction gear 31 is released.

That is, as shown in FIG. 6, when the tape cassette 2 or 3 is mounted on the cassette mounting plate 21, the cassette case 4 or 4 ′ of the tape cassette 2 or 3 ′ is placed on the shaft portion 30 a of the clutch gear 30.
The tip end of the clutch gear 30 is pressed downward, the clutch gear 30 is moved to the disengagement position, which is slightly lower than the engagement position, and the output gear 28 of the clutch gear 30 and the first reduction gear 31 The mesh is released.

As a result, when the tape cassettes 2 and 3 are mounted, the transmission path by the gear train 37 is cut off, and even if the reel base drive motor 26 is rotated, its rotational force is not applied to the fixed gear 35. The reel base support arm 23 does not move.

When the tape cassette 2 or 3 is taken out, the clutch gear 30 is returned to the meshing position by the elastic force of the coil spring 36, and the gear train 37 is brought into a functioning state.

When the reel base support arms 23, 23 are moved, the reel base drive motors 26, 26 are rotated in synchronization with each other, and the rotation directions thereof are opposite to each other.

The insertion hole 25a formed in the projecting portion 25 of the reel stand supporting arm 23 is provided in the reel stand supporting arm 23.
Is located coaxially with the front lock hole 19 formed in the sub-chassis 17 (see FIG. 2) when the first position is reached, and when the reel base support arm 23 is at the second position. It is positioned coaxially with the rear lock hole 20 formed in the chassis 17 (see FIG. 3).

Reference numeral 38 is a lock pin for locking the reel base support arm 23 at the first position or the second position.

The lock pin 38 has a cylindrical main portion 38a.
And a flange 38c protruding laterally from the lower end of the upper end 38b, and the lower end of the main part 38a has a lower end than the main part 38a.
3 is slidably inserted into the insertion hole 25a formed in the hole 3.

Reference numeral 21c is an arc-shaped elongated hole formed at a position corresponding to the movement locus of the insertion hole 25a in the cassette mounting plate 21, and the upper end portion 38b of the lock pin 38 is upwardly moved through this elongated hole 21c. It is projected.

Reference numeral 39 is a coil spring externally fitted to the main portion 38a of the lock pin 38, and is used for the reel base support arm 23.
Is contracted between the upper surface of the lock pin 38 and the flange 38c of the lock pin 38.

Therefore, due to the elastic force of the coil spring 39,
The lock pin 38 is urged to move upward, and in the state where it is not pressed downward, its flange 38c abuts the lower surface of the cassette mounting plate 21, as shown in FIG. The lower end of the main portion 38a is held in an unlocked position where it does not project downward from the insertion hole 25a of the reel base support arm 23.

Like the clutch gear 30, the lock pin 38 is pushed downward by the mounting of the tape cassette 2 or 3 and inserted into the lock hole 19 or 20 of the sub chassis 17.

That is, when the tape cassette 2 or 3 is mounted, the cassette case 4 or 4 ′ of the tape cassette 2 or 3 ′ projects above the cassette mounting plate 21 of the lock pin 38 from the upper end portion 38 b.
Is pushed downward, whereby the lock pin 38 is moved downward, and the lower end portion of the main portion 38a is inserted into the lock hole 19 or 20 (see FIG. 6). It is locked in the first position or the second position.

When the tape cassette 2 or 3 is taken out, the lock pin 38 is returned to the non-locked position by the elastic force of the coil spring 39, whereby the lock made on the reel base support arm 23 is released. To be done.

Therefore, as in the above-described embodiment, the switching means for switching the reel base moving means between the functioning state and the non-functioning state can be mechanically switched by the clutch gear, and the reeling operation can be performed mechanically. It is possible to reliably prevent the platform moving means from operating.

[0082]

As is apparent from the above description, the recording / reproducing apparatus of the present invention is a recording / reproducing apparatus that changes the position of the reel base according to the size of the tape cassette used, and the reel base rotates. A reel base support arm supported freely is rotatably supported on the chassis, a reel base drive motor is fixed to the reel base support arm, and the reel base support arm is rotated by the rotation of the reel base drive motor. It is characterized in that a reel base moving means for changing the position of the reel base and a switching means for selectively switching between a state in which the reel base moving means works and a state in which the reel base moving means do not function are provided.

Therefore, in the recording / reproducing apparatus of the present invention,
Since the reel stand can be moved by using the motor for rotating the reel stand, a motor dedicated for moving the reel stand can be omitted, and the cost can be reduced accordingly, and the device can be It can be miniaturized.

Further, by using mechanical switching means for switching between a state where the reel base moving means for moving the reel base functions and a state where the reel base moving means does not function, there is a possibility that the reel base moving means may operate due to a malfunction. You can leave it out.

In the above embodiment, the two reel bases are moved by the respective reel base drive motors. However, in some cases, the two reel base support arms are connected by the link means. It is also conceivable to move two reel stands by one reel stand drive motor.

Further, in the above embodiment, the present invention is applied to the type in which both of the two reel stands are moved, but the present invention can also be applied to the type in which only one reel stand is moved.

In addition, the structures or shapes of the reel base support arm, reel base moving means, switching means and other parts shown in the above embodiment are merely examples of the embodiment of the present invention. However, the technical scope of the present invention should not be limitedly interpreted by these.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an example in which the recording / reproducing apparatus of the present invention is applied to a video tape player, in which two types of tape cassettes, large and small, are stacked.

FIG. 2 is a plan view of a reel stand moving mechanism showing a state where the reel stand is in a large cassette position.

FIG. 3 is a plan view of the reel stand moving mechanism showing a state where the reel stand is in the small cassette position.

FIG. 4 is an exploded perspective view of a main part of a reel base moving mechanism.

FIG. 5 is a front view of the reel base moving mechanism before a tape cassette is mounted.

FIG. 6 is a front view of the reel base moving mechanism with a tape cassette mounted.

7 is an enlarged cross-sectional view taken along the line VII-VII of FIG.

FIG. 8 is a plan view showing an example of a conventional reel base moving mechanism.

[Explanation of symbols]

 1 Recording / reproducing apparatus 2 Tape cassette 3 Tape cassette 13 Reel stand 13 'Reel stand 17 Chassis 19, 20, 38 Locking means 23 Reel stand supporting arm 26 Reel stand drive motor 28 Rotating gear (gear of adjacent stage) 30, 36 Switching means (Clutch gear) 31 Adjacent gear 35 Fixed gear 37 Reel stand moving means (gear train)

Claims (4)

[Claims] 1. A recording / reproducing apparatus for changing the position of a reel stand according to the size of a tape cassette used, wherein a reel stand supporting arm, on which the reel stand is rotatably supported, is rotatably supported on a chassis. A reel table moving means for fixing a reel table driving motor to the reel table supporting arm, and rotating the reel table supporting arm to change the position of the reel table by rotating the reel table driving motor; and the reel table moving means. A recording / reproducing apparatus provided with switching means for selectively switching between a functional state and a non-functional state. 2. The recording / reproducing apparatus according to claim 1, further comprising locking means for locking the reel base support arm at a predetermined position. 3. The reel base moving means is constituted by a gear train having a rotary gear for transmitting the rotation of the reel base drive motor and a fixed gear fixed to the chassis and meshing with the rotary gear. The recording / reproducing apparatus according to claim 1. 4. One of the gears in the gear train is a clutch gear which can be meshed with and separated from an adjacent gear, and when the tape cassette is mounted, the clutch gear is moved to a position where the mesh with the adjacent gear is released. The recording / reproducing apparatus according to claim 3, wherein the switching means is configured as described above.