JPS61284857A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To make the titled device small in size and to reduce its cost by a simple constitution by rotating a reel and winding a magnetic tape when moving relatively a substrate to which a rotary head cylinder and a rack are attached and a cassette substrate provided with a rotary means containing a gear engaged to a rack. CONSTITUTION:When a cassette substrate 3 or a substrate 1 is moved relatively to the other, an arm 31 and an arm 35 turn clockwise and counter-clockwise, respectively, and a magnetic tape 18 is drawn out of a cassette 19. A link mechanism presses upward moving bases 9 and 10, respectively, and the magnetic tape 18 is wound roughly symmetrically to a rotary head cylinder 9. When a cassette 19 is moved to a musical performance position, the arm 31 turns clockwise, therefore, a pinch roller 33 contacts with the pressure of the magnetic tape 18 to a capstan 4. As the magnetic tape 18 runs, the capstan 4 and gears 24, 25 rotate together, and this rotation is transferred to a winding reel. When the cassette substrate 3 moves backward, a gear 44 engaged to a rack 43 rotates clockwise.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing device typified by a cassette video tape recorder.

[Summary of the invention]

The present invention relates to a magnetic recording/reproducing device in which a magnetic tape wound and stored between a supply reel and a take-up reel of a cassette is pulled out and loaded onto the outer periphery of a rotary head cylinder, in which a rotary head cylinder is attached. a cassette board on which a cassette is attached and is movable relative to the board; a rack attached to the board; and at least a gear meshing with the rack;
a rotating means supported by the cassette board so as to rotate at least one of the supply reel or the take-up reel in conjunction with the movement of the rack; When moving relative to each other, at least one of the supply reel and the take-up reel is rotated by a rack supported on the substrate through a rotation means supported on the cassette substrate, and the cassette is pulled out and loaded into the rotating head cylinder. In this system, the magnetic tape is wound up, and the cassette and the magnetic tape can be unloaded in a short time by using the relative movement between the substrate and the cassette substrate with a simple structure.

[Conventional technology]

In cassette video tape recorders, etc., the magnetic tape is housed in the cassette, so there is a so-called cassette loading operation in which the cassette is moved between the loading position and the playing position, and the magnetic tape is rotated while it is housed in the cassette. A so-called tape loading operation is required in which the head is moved between the rotating state in which the head is attached and the state in which it is wound around the outer periphery of the Rad cylinder. In order to realize such cassette loading and tape loading, various devices have been proposed in the past, but most of them perform cassette loading and tape loading separately and independently. That is, first, cassette loading is performed,
Tape loading is performed after cassette loading is completed. Similarly, tape unloading is first performed, and after that, cassette unloading is performed.

[Problem that the invention seeks to solve]

In this way, conventional devices perform cassette loading and tape loading separately and independently, which not only increases the complexity and size of the device, but also increases the complexity and size of the device.

This has the disadvantage that it takes a long time until the magnetic tape is loaded or the cassette is ejected.

[Means for solving problems]

Each figure shows the configuration of the magnetic recording/reproducing apparatus of the present invention. In these figures, reference numeral 1 denotes a substrate, and a rotary head cylinder 2 on which a rotary head (not shown) is mounted is attached. Reference numeral 3 designates a cassette board on which the cassette is mounted, which has a plurality of pins that fit into a plurality of long holes formed in the board 1 (all of which are not shown), and is movable relative to the board 1. It has become. 4 is a capstan attached to the board 1. Guide plates 5.6 are fixed to the substrate 1 on the outer periphery of the rotary head cylinder 2 in a substantially bilaterally symmetrical manner, and each guide plate has a guide groove 7.8. 9.10
are moving tables, and guide grooves 7.8 of guide plates 5.6, respectively
It is guided by and is movable around the outer periphery of the rotary head cylinder 2. Since the rotary head cylinder 2 is provided inclined at a predetermined angle with respect to the substrate 1, the guide plate 5.6 is provided parallel to the substrate 1 (of course, the reverse is also possible). . The movable carriages 9.10 each have rotating guide rollers 11.12 and guide balls 13.14 inclined at a predetermined angle. The relative movement between the substrate 1 and the cassette substrate 3 is transmitted to the movable tables 9, 1o by a link (not shown). 15.
Reference numeral 16 denotes a reel stand provided on the cassette board 3 for one winding and for supply. An arm 31 is rotatably supported on a fulcrum 32 of the cassette board 3, and has a pinch roller 33 and a guide 34 for pulling out the magnetic tape. Reference numeral 35 denotes an arm rotatably supported around a fulcrum 36 of the cassette board 3.

It has a guide 37 for pulling out the magnetic tape. Arm 3
1 and 35 are respectively rotated by the relative movement of the substrate 1 and the cassette substrate 3 by a cam mechanism (not shown).

Reference numeral 20 denotes a motor fixed to the substrate 1, which transmits rotation via a belt 21 to a flywheel 22 to which the capstan 4 is connected. 23 is a pulley that applies tension to the belt 21. A gear 24 is connected to the capstan 4, and is also connected to a gear 25. 26 and 27 are gears supported by the cassette board 3 that mesh with each other. 28 is a pulley coaxially connected to the gear 27, 29 is a pulley coaxially connected to the reel stand 15 of the take-up reel, and 30 is a belt that transmits rotation between the pulleys 28 and 29. The pulley 29 is urged toward the reel stand 15 by a spring, and the two are brought into pressure contact with each other via felt (neither is shown). A pin 39 coaxially connecting the gear 27 and the pulley 28 also functions as a reference pin for positioning the cassette at a predetermined position.

A rack plate 41 is fixed to the substrate 1 by a pin 42 inserted into a long hole 38 formed in the cassette substrate 3, and is integrated with the substrate 1. The elongated hole 38 is provided to prevent the pin 42 from coming into contact with the rack plate 41 when the board 1 moves relative to the cassette board 3. A pin 61 is embedded in the cassette board 3 and is inserted into a long hole 62 formed in the rack plate 41 to guide the rack plate 41 when the board 1 and the cassette board 3 move relative to each other. There is.

43 is a rack formed on the rack plate 41;
It meshes with a gear 44 attached to the cassette board 3. 45 is a gear provided coaxially with gear 44, 46 is a gear provided to mesh with gear 45, and the gear ratios of these gears are set so that the transmitted speed increases sequentially. 47 is a pulley provided coaxially with the gear 46, and 651 is a spring whose rotation is transmitted to the pulley 49 via the belt 48, which connects the pulley 49 to the reel stand 16 via the felt 52. They are in pressure contact. Reference numeral 53 designates a spring having a substantially rectangular cross section with one end 54 fitted into a hole 55 formed in the pulley 47. The pulley 47 is pressed against the gear 46 via a felt 56 and a washer 57.

It constitutes a kind of one-way clutch.

[Effect]

The effect will now be explained. As shown in FIG. 1, the cassette 19 is mounted on the cassette substrate 3 in a state where the cassette substrate 3 is separated from the rotary head cylinder 2. In the state before such loading is started, the guides 34, 37. Pinch roller 33. Guide roller 11.
12, a magnetic tape 18 is positioned between the guide poles 13, 14, etc. and the rotary head cylinder 2. Next, the cassette substrate 3 or the substrate 1 is moved relative to the other by driving a motor (not shown) or by manual operation (for example, the cassette substrate 3 is moved upward in the figure). At this time, the arm 31 is rotated clockwise by the cam mechanism. As a result, the magnetic tape 18 is pulled out from the cassette 19 by the guide 34. Similarly, as the cassette board 3 moves, the arm 35 rotates counterclockwise, and the magnetic tape 18 is pulled out from the cassette 19. At this time, gears 25 and 26 are not yet coupled. Thus, magnetic tape 18 can be withdrawn from a supply reel, a take-up reel, or both.

For example, when the magnetic tape 18 is pulled out from the supply reel, a brake is applied to the reel stand 15 by means not shown. When the cassette board 3 moves upward, since the rack plate 41 is fixed to the board 1, the gears 44, 45
rotates counterclockwise, and gear 46 rotates clockwise. When the gear 46 rotates clockwise, the spring 53 loosens and its diameter increases, and when the gear 46 rotates counterclockwise, it contracts and its diameter decreases.

As a result, the spring 53 is loosened, the rotation of the gear 46 is transmitted with slippage, and the pulley 47 rotates clockwise.

On the other hand, as described above, since the magnetic tape 18 is pulled by the guides 34, 37, etc., the supply reel and therefore the reel stand 16
rotates clockwise, this rotation is transmitted by belt 48, and pulley 47 rotates clockwise. The rotational force caused by the pulling out operation of the magnetic tape 18 is set to be larger than the rotational force caused by the movement of the rack 43.

As a result, the magnetic tape 18 can be pulled out from the cassette 19, and at this time, an appropriate pack tension is applied to the magnetic tape 18.

When the cassette board 3 is further moved upward, the link mechanism presses the movable bases 9 and 10 upward, and the movable bases 9.1
0 is guided by the guide plate 5.6 and moves upward. As a result, as shown in FIG. 2, the magnetic tape 18 is wound approximately symmetrically around the rotary head cylinder 2 by the guide rollers 11.12 and guide balls 13.14 provided on the moving table 9.10 (of course). By appropriately selecting the position of the movable table 9.1o (that is, the position of the guide plates 5, 6), it is also possible to wind it asymmetrically. When the cassette board 3 moves the cassette 19 to this playing position, the arm 31 rotates significantly clockwise, and the pinch roller 33 presses the magnetic tape 18 against the capstan 4.

On the other hand, when the cassette board 3 advances to a predetermined position relative to the board 1, the gear 26 is coupled to the gear 25.

Therefore, the capstan 4 is rotated via the motor 20, the belt 21, and the flywheel 22, and the magnetic tape 18 is run, and since the capstan 4 is rotated, the gears 24 and 25 are also rotated.

This rotation is transmitted to the gears 26, 27, and then to the reel stand 15 of the take-up reel via the pulley 28, belt 30, and pulley 29. Therefore, the magnetic tape 18 can be wound up by a take-up reel. The brake applied to the reel stand 15 for winding is released as necessary (if it is a so-called soft brake, it may be forced not to be released).

Next, the unloading operation will be explained.

During unloading, the cassette substrate 3 is moved relative to the substrate 1 in the opposite direction to that during loading. Therefore, the gears 25 and 26 are separated, and the reel stand 1
5 is no longer available, and the supply reel is no longer rotated.

On the other hand, when the cassette board 3 retreats with respect to the board 1, the gear 44 meshing with the rack 43 rotates clockwise. Therefore, the gear 45 rotates clockwise and the gear 46 rotates counterclockwise. When the gear 46 rotates counterclockwise, the spring 53 contracts and becomes integrated with the gear 46, and there is no slippage between the spring 53 and the gear 46, so the gear 4
6 is directly transmitted to the pulley 47. Pulley 4
The rotation of 7 is transmitted to the pulley 49 via the belt 48,
The reel stand 16 is rotated counterclockwise.

Since the ratio of each gear 44, 45, 46 is set so that the movement of the rack 43 is accelerated and transmitted, even if the stroke of the cassette board 3 with respect to the board 1 is small, the reel stand 16 is relatively Rotate at high speed. In addition, as the cassette board 3 moves backward, the moving table 9.10 and the arm 31
．． 35 etc. moves to its original state. As a result, cassette 19
is returned to the mounting position, and the magnetic tape 18 is also returned (taken up) to the supply reel without loosening.

Note that the relative movement between the substrate 1 and the cassette substrate 3 is not a linear movement as described above, but may be a rotational movement or a combination thereof. Also gear, 24.25.26
．． It is clear that 27 can also be a rotation means rotated by friction, such as an idler, for example. Also gear 2
It is also possible to omit gears 5 and 26 and have gears 24 and 27 mesh directly. However, in this case, in order to mesh the gears 24 and 27, it is necessary to increase the diameter thereof, which occupies a large space. Therefore, it is preferable to arrange a plurality of gears with relatively small diameters as in the embodiment.

〔effect〕

As described above, the present invention is directed to a magnetic recording/reproducing apparatus which draws out a magnetic tape stored and wound between a supply reel and a take-up reel of a cassette and loads it onto the outer periphery of a rotary head cylinder.

The rack includes a substrate to which a rotating head cylinder is attached, a cassette substrate to which a cassette is attached and is movable relative to the substrate, a rack attached to the substrate, and at least a gear meshing with the rack. a rotation means supported by the cassette substrate so as to rotate at least one of the supply reel or the take-up reel in conjunction with the movement, and the cassette substrate is moved from the playing position of the cassette to the mounting position relative to the substrate When the cassette is moved, a rack supported on the substrate rotates at least one of the supply reel or the take-up reel via a rotation means supported on the cassette substrate, and the cassette is pulled out from the cassette.
Since the magnetic tape loaded on the rotary head cylinder is wound up, the cassette and magnetic tape can be unloaded simultaneously in a short time by utilizing the relative movement between the substrate and the cassette substrate with a simple configuration. I can do it. Therefore, it is possible to reduce the size and cost of the device.

[Brief explanation of drawings]

FIG. 1 is a plan view of the magnetic recording/reproducing apparatus of the present invention when loading is started, FIG. 2 is a plan view when loading is completed, FIG. 3 is a partial plan view thereof, and FIGS. 4 and 5 are portions thereof. FIG. 1... Board 2... Rotating head cylinder 3...
Cassette board 4...Capstan 5.6...Guide plate 9,10...Movement base 15.1
6... Reel stand 20... Motor 21.30.4
8...Belt 22...Flywheel 23.28.29.47.49...Pulley 24.25
．． 26.27.44.45.46...Gear 31.
35...7-mu 33...Pinch roller 34.37...Guide 41...Rack plate 43...Rack 51.
53...Spring 52.56...More than felt

Claims (1)

[Claims] A magnetic recording and reproducing device that pulls out a magnetic tape that is wound and housed between a supply reel and a take-up reel of a cassette and loads it onto the outer periphery of a rotary head cylinder, the rotary head cylinder comprising: a cassette board to which the cassette is mounted and which is movable relative to the board; a rack mounted to the board; and a gear meshing with at least the rack, the rack rotating means supported by the cassette substrate to rotate at least one of the supply reel or the take-up reel in conjunction with the movement of the cassette substrate, the rotation means being supported by the cassette substrate from the playing position to the mounting position of the cassette; When moving relative to the substrate, the rack supported by the substrate rotates at least one of the supply reel or the take-up reel via the rotation means supported by the cassette substrate. , a magnetic recording and reproducing apparatus characterized in that the magnetic tape that has been pulled out from the cassette and loaded onto the rotary head cylinder is wound up.