JPH0334141B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing apparatus 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 housed 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 a gear meshing with at least the rack;
a rotating means supported by the cassette board so as to rotate at least one of the supply reel and the take-up reel in conjunction with the movement of the rack;
When the cassette board is moved relative to the board from the playing position to the loading position of the cassette, a rack supported by the board moves at least one of the supply reel and the take-up reel through a rotating means supported by the cassette board. One side is rotated to wind up the magnetic tape that has been pulled out from the cassette and loaded onto the rotating head cylinder.With a simple configuration, the cassette and magnetic tape are connected by utilizing the relative movement between the substrate and the cassette substrate. This allows the tape to be unloaded in a short time.

[Prior Art] In a cassette video tape recorder, 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 loaded in the cassette. A so-called tape loading operation is required to move between the state in which the tape is wrapped around the outer periphery of the rotary head cylinder to which the rotary head is attached. 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, cassette loading is performed first, and after cassette loading is completed, tape loading is performed. Similarly, tape unloading is performed first, 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 makes it difficult to load the magnetic tape after commanding to start or stop playback. The drawback was that it took a long time to load the cassette or eject the cassette.

[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 base plate, to which is attached a rotating head cylinder 2 to which a rotating head (not shown) is mounted. 3 is a cassette board to which a cassette is attached, and board 1
It has a plurality of pins (none of which are shown) that fit into a plurality of long holes formed in the substrate 1, and is movable relative to the substrate 1. 4 is a capstan attached to the substrate 1. Reference numerals 5 and 6 designate guide plates fixed to the base plate 1 on the outer periphery of the rotary head cylinder 2 in a substantially bilaterally symmetrical manner, and have guide grooves 7 and 8, respectively. Reference numerals 9 and 10 denote movable tables, which are guided by guide grooves 7 and 8 of guide plates 5 and 6, respectively, and are movable around the outer periphery of the rotary head cylinder 2. Since the rotating head cylinder 2 is provided inclined at a predetermined angle with respect to the substrate 1, the guide plates 5 and 6 are provided parallel to the substrate 1 (of course, it is also possible to reverse the arrangement). . Mobile table 9,1
0 includes guide rollers 11 and 12 that rotate, respectively;
It has guide poles 13 and 14 inclined at a predetermined angle. Relative movement between the substrate 1 and the cassette substrate 3 is controlled by moving tables 9 and 10 by links (not shown).
It is now being transmitted to Reference numerals 15 and 16 are reel stands provided on the cassette board 3 for winding and 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. An arm 35 is rotatably supported around a fulcrum 36 of the cassette board 3, and has a guide 37 for drawing out the magnetic tape. The arms 31 and 35 are each 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 base plate 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 connected to a gear 25. 26,
Reference numeral 27 indicates gears supported by the cassette base plate 3 that mesh with each other. 28 is a pulley coaxially connected to the gear 27, and 29 is a reel stand 15 of the take-up reel.
A pulley 30 is coaxially connected to both pulleys 2 and 30.
This is a belt that transmits rotation between 8 and 29. The pulley 29 is biased toward the reel stand 15 by a spring, and the two are pressed against each other via felt (neither is shown).
Pin 39 coaxially connects gear 27 and pulley 28
The pins also function as reference pins for positioning the cassette in a predetermined position.

41 is a rack plate, and the cassette board 3
A pin 42 inserted into a long hole 38 formed in
is fixed to the substrate 1 and integrated with the substrate 1. The elongated hole 38 allows the pin 42 to be inserted into the rack plate 41 when the substrate 1 moves relative to the cassette substrate 3.
This is to prevent contact with the 61
is a pin embedded in the cassette board 3, which is inserted into a long hole 62 formed in the rack plate 41, and when the board 1 and the cassette board 3 move relative to each other,
It is adapted to guide the rack plate 41. A rack 43 is formed on the rack plate 41 and 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.
A pulley 47 is provided coaxially with the gear 46, and its rotation is transmitted to the pulley 49 via a belt 48. A spring 51 presses the pulley 49 against the reel stand 16 via a felt 52. Reference numeral 53 denotes a spring having a substantially square 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 one-way clutch.

[Effect]

The effect will now be explained. As shown in FIG. 1, the cassette 19 is mounted on the cassette base 3 while the cassette base 3 is separated from the rotary head cylinder 2. Before such loading is started, the magnetic tape 18 is positioned between the guides 34, 37, the pinch roller 33, the guide rollers 11, 12, the guide poles 13, 14, etc. and the rotating head cylinder 2. is being done. Next, the cassette board 3 or the board 1 is moved relative to the other by driving a motor (not shown) or by manual operation (for example, the cassette board 3
(move it upwards in the diagram). 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 and 45 rotate counterclockwise, and the 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, as the magnetic tape 18 is pulled by the guides 34, 37, etc., the supply reel and therefore the reel stand 16 rotate clockwise, and this rotation is transmitted by the belt 48, causing the pulley 47 to rotate clockwise. . The rotational force caused by the movement of the magnetic tape 18 is set to be greater than the rotational force caused by the movement of the rack 43.
As a result, it becomes possible to pull out the magnetic tape 18 from the cassette 19, and at this time, an appropriate back tension is applied to the magnetic tape 18.

When the cassette board 3 is further moved upward,
The link mechanism presses the movable tables 9 and 10 upward, and the movable tables 9 and 10 are guided by the guide plates 5 and 6 and move upward. As a result, as shown in FIG.
1, 12, the magnetic tape 18 is wound approximately symmetrically around the rotary head cylinder 2 by the guide poles 13, 14 (of course, the positions of the movable tables 9, 10 (that is, the positions of the guide plates 5, 6) are selected as appropriate). (This allows for asymmetrical winding.) 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 substrate 3 advances to a predetermined position relative to the substrate 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 rotated together. This rotation is transmitted to the gears 26 and 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 gears 25 and 2
6 is separated, the drive source for the reel stand 15 is lost,
The supply reel is no longer rotated.

On the other hand, when the cassette board 3 moves backward 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 is contracted and integrated with the gear 46, and there is no slippage between the spring 53 and the gear 46, so the rotation of the gear 46 is directly transmitted to the pulley 47. Pulley 4
7 is transmitted to the pulley 49 via the belt 48, and 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 transmitted at an increased speed, 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. Further, as the cassette board 3 moves backward, the movable tables 9, 10, arms 31, 35, etc. move to their original states. As a result, the cassette 19 is returned to the mounting position, and the magnetic tape 18 is also returned (taken up) to the supply reel without slack.
It turns out.

Incidentally, 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. It is clear that the gears 24, 25, 26, 27 may also be frictionally rotating means, such as idlers, for example. It is also possible to omit the gears 25 and 26 and have the gears 24 and 27 directly mesh with each other. 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 each having a relatively small diameter as in the embodiment.

〔effect〕

As described above, the present invention provides a magnetic recording/reproducing apparatus in which a magnetic tape wound and housed 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. A cassette board with a cassette mounted thereon, a rack mounted on the board, and a gear that meshes with at least the rack, and is interlocked with the movement of 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, and the cassette board is moved from the playing position to the mounting position relative to the board. , rotating at least one of the supply reel and the take-up reel through a rotating means supported by the cassette board by means of a rack supported by the board, and the magnetic tape being pulled out from the cassette and loaded into the rotating head cylinder. Since the magnetic tape is wound up, the cassette and the magnetic tape can be unloaded simultaneously in a short time by using the relative movement between the substrate and the cassette substrate with a simple structure. 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 at the start of loading, FIG. 2 is a plan view when loading is completed, FIG. 3 is a partial plan view thereof, and FIG.
FIG. 5 is a partial side sectional view thereof. 1... Board, 2... Rotating head cylinder, 3...
...Cassette board, 4...Capstan, 5, 6...
...Guide plate, 9, 10...Movement table, 15, 16...
...Reel stand, 20...Motor, 21, 30, 48
... Belt, 22 ... Flywheel, 23,2
8, 29, 47, 49...Pulley, 24, 25,
26, 27, 44, 45, 46... Gear, 31,
35...Arm, 33...Pinch roller, 34,
37...Guide, 41...Rack plate, 43
...Rack, 51, 53...Spring, 52,
56...Felt.

Claims (1)

[Scope of Claims] 1. A magnetic recording and reproducing device that pulls 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 rotating head cylinder, comprising: a cassette board to which the cassette is mounted and movable relative to the board; a rack mounted to the board; and a gear meshing with at least the rack. rotating means supported by the cassette base plate 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 the substrate,
At least one of the supply reel and the take-up reel is rotated by the rack supported on the base plate via the rotating means supported on the cassette base, and the supply reel or the take-up reel is pulled out from the cassette and attached to the rotating head cylinder. A magnetic recording/reproducing device characterized by winding up the loaded magnetic tape.