JP2569525B2 - Tape-producing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading device applied to a magnetic recording / reproducing device having a rotating head drum such as a cassette type video tape recorder (VTR), and particularly to a thin device. The present invention relates to a tape loading device capable of reducing the size and size.

[Summary of the Invention] The present invention relates to a tape loading device for a rotary head drum of a magnetic recording / reproducing apparatus, in which the rotary head drum is thinned, and the guide positions of a tape entrance guide and a tape exit guide for winding a tape around the rotary head drum. It is arranged so that the rotating head drum enters the mouth space of the tape cassette in the loading state while being distributed in the opposite direction from the tape center of the tape cassette, and further includes a plane including the upper end of the capstan housing and the lower end of the motor for driving the capstan. By locating at least the rotary head drum and the tape entrance and exit guides between the flat surface, the peripheral mechanism including the rotary head drum can be made thinner and smaller.

[Prior Art] VTRs and digital recording type PCM recorders use a rotating head drum to form a diagonally long track on a narrow magnetic tape and record a lot of information on one track. A method of scanning the head obliquely with respect to the tape is employed. For this reason, the tape is arranged in an inclined relationship with respect to the rotating head drum,
It is necessary to wind at the required winding angle.

FIG. 4 (a) shows a conventional tape loading method.
There are two methods shown in FIG.

One of them is the U loading method shown in FIG.
In this U-loading method, one of the tape winding entrance 101 and the exit 102 has the same tape height as the tape cassette, and the other has an upper / lower difference h ₁₀₀ generated by a lead angle, that is, an inclination angle between the head and the tape. The rotary head drum 100 is disposed almost vertically.

The other is the M loading method shown in FIG.
In the M-loading method, the rotary head drum 100 'is inclined so that the height of the tape winding entrance 101' and the exit 102 'are the same as the height of the tape cassette.

[Problems to be Solved by the Invention] In recent years, there has been a demand for thinner and smaller devices for VTRs and PCM recorders. One is for portability of listening while carrying around like audio playback.
This is for operability such as portability as well as ease of holding like 8mm video camera.

When the conventional loading method described above is applied to these small and thin VTRs, there are the following problems.

In order to reduce the size of the device, it is necessary to insert at least a relatively large rotating head drum into the space inside the mouse of the tape cassette. However, in the M loading method, the rotating head drum is greatly inclined and the occupied space is increased. There is a problem that the size cannot be reduced because it is too large to fit in the space inside the mouse of the tape cassette.

For this reason, the rotating head drum is not greatly inclined.
In the loading system, when the rotary head drum is inserted into the space inside the mouse of the tape cassette to reduce the size, even if the height of the rotary head drum can be reduced, the tape is inserted at one of the tape entrance and exit of the rotary head drum. There has been a problem that the height cannot be reduced due to the height of the tape guide mechanism and the protrusion of the tape guide mechanism.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a tape loading device which enables a peripheral mechanism including a rotary head drum to be made thinner and smaller.

[Means for Solving the Problems] The configuration of the present invention for achieving the above object is as follows: in tape loading in which a tape of a tape cassette is wound around a peripheral surface of a rotary head drum by a tape entrance guide and a tape exit guide; The rotary head drum includes a rotor having a permanent magnet, which is a coreless motor, and a stator that generates a rotating magnetic field. The guide position of the tape entrance guide and the guide position of the tape exit guide in a loading state are determined by the tape cassette. A plane including the upper end of a capstan housing for storing the capstan for driving the tape, arranged so that the rotating head drum enters the mouth space of the tape cassette in the loading state while being distributed in the opposite direction from the tape center. Die the capstan Characterized in that said at least said rotary head drum tape inlet and outlet guide was positioned between the plane including the coreless motor bottom of transfected driving.

It is preferable that the above-mentioned sorting be performed evenly from the tape center of the tape cassette.

[Operation] In the present invention, the rotary head drum itself is made thinner, the height of the motor for driving the capstan is made thinner, and the tape inlet guide and tape outlet guide are distributed in both directions from the tape center to reduce the inclination of the rotary head drum. In addition to lowering the storage height, the space for storing the tape cassette can be effectively used for storing the rotating head drum and peripheral mechanisms, and furthermore, the plane including the upper end of the capstan housing and the capstan are driven. By positioning at least the rotary head drum and the tape entrance and exit guides between the plane including the lower end of the motor, a thin and compact tape loading mechanism is realized in total.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic configuration view from the side of a tape loading device showing one embodiment of the present invention, FIG. 2 is a schematic configuration view from the top surface, and FIG. 3 is a schematic diagram of a tape guide and its moving mechanism. It is a perspective view which shows a structure. This embodiment shows an example applied to an 8 mm VTR.

Reference numeral 1 denotes a storage space for the mechanical unit, and the storage space for the tape cassette 2 occupies a large portion in the thickness direction. 1 and 2 show a loading state, in which the tape entrance guide 4
The tape 2a of the tape cassette 2 is pulled out by the tape exit guide 5 and wound at a required winding angle. The tape entrance guide 4 is used for the tape cassette 2 as described later.
The tape exit guide 5 moves downward from the tape center xx 'and moves downward from the tape center xx'. Placed.

In the embodiment, the rotary head drum 3 is arranged to be slightly inclined rearward in FIG. 1 in relation to the tape guide in consideration of tape damage, but basically, the tape side is inclined up and down. Because it is wound, it may be vertical. The rotary head drum 3 is a coreless motor drive that can be manufactured to be thin, and the rotor side having a permanent magnet is disposed on the rotation side, and the stator side that generates a rotating magnetic field is disposed on the fixed side together with a rotary transformer and the like. hand,
Form thin. When the tape cassette 2 is loaded as shown in FIG. 2 in order to reduce the size of the rotary head drum 3, the rotary head drum 3 is loaded while being inserted into the space of the mouse. In addition, between the plane including the upper end of the capstan housing 16 accommodating the capstan 9 for driving the tape and the plane including the lower end of the coreless motor 12 for directly driving the capstan 9, at least the rotating head drum 3 The tape entrance guide 4 and the tape exit guide 5 are disposed so as to be located.

As shown in FIG. 2, the tape entrance guide 4 and the tape exit guide 5 for loading are moved along the guide grooves 6a and 7a formed on the guide rails 6 and 7, respectively, by a driving mechanism described later. Are moved from the waiting positions A ', B' inside the tape to the loading positions A, B. This movement is performed by another tape guide or guide roller 8.
a, 8b, 8c, 8d, and the pulling of the tape 2a by the guide rollers 10a, 10b, 10c for attaching the tape 2a to the capstan 9, etc., and the pressing of the pinch roller 11, etc., are performed.
An attempt is made to ensure that the tape can be wound around the rotary head drum 3. In the vicinity of the standby position A 'of the tape entrance guide 4, the guide rail 6 sets the tape entrance guide 4 at the same height as the tape in order to pull out the tape 2a.
In its center as shown in Figure 1 is arranged so as to be positioned at a height of h ₁ upward from the tape center x-x of the tape cassette 2 '. The other guide rail 7
In the vicinity of the standby position B ', the tape exit guide 5 has the same height as the tape, and at the loading position B, the center thereof is lower than the tape center xx' of the tape cassette 2 as shown in FIG. It is arranged so as to be positioned at a height of h ₂ in.

During recording and playback, the tape 2a
The tape cassette is moved at a constant speed from the supply reel 2b side to the take-up reel 2c side by the pressing of 11 and the driving of the capstan 9. A motor for rotating the capstan 9 at a constant speed
For 12, it is preferable to use a thin coreless motor for direct drive and to reduce the thickness.

FIG. 3 is an exploded perspective view of an example of a loading tape guide and its driving mechanism.

The tape entrance guide 4 and the tape exit guide 5 respectively have inclined guides 4b, 5b and inclined roller guides 4c, 5c attached to the movable bases 4a, 5a, respectively, and guide pins 4d, 5d on the lower surfaces of the movable bases 4a, 5a. It is configured by attaching pins 4e and 5e. These pins are fitted into the guide grooves 6a, 7a (FIG. 2) of the respective guide rails, and the guide pins 4d, 5d are provided with members for preventing the guide rails 6a, 7a from falling off, respectively. The guide rails 6 and 7 can be moved along the plane. The drive pins 4e and 5e are connected to the ring gears 13 and 14, respectively.
Are loosely fitted into the pin insertion holes 13b and 14b of the link members 13a and 14a and move up and down.

The ring gears 13 and 14 are actually arranged on the outer periphery of the rotary head drum with their end faces close to each other, and the ring gear 13 is first rotated by meshing of a gear 15 driven by a drive motor (not shown). The transmission gear 13c meshing with the ring gear 14 is rotated in reverse with respect to the transmission gear 13c via the transmission gear 13c meshing with the ring gear 13 and further via an intermediate gear (not shown), and the ring gear 13 is rotated.
Is rotated in the opposite direction.

The link members 13a, 14a are rotatably supported by slidable shafts 13e, 14e locked in grooves 13d, 14d formed on the end faces of the ring gears 13, 14, respectively.
Powered by 3f, 14f. These biasing members 13f, 14f
When the tape guides 4 and 5 are fixed to the loading position by engaging the guide pins 4d and 5d with the V-grooves provided on the guide rails and the like, they are used to obtain an urging force for holding the fixing.

 The operation of the embodiment configured as described above will be described.

Techniques for reducing the thickness and size of the device include reducing the thickness and size of the members themselves and eliminating dead spaces (unused spaces). In the conventional U-loading method, in the loading state, if one tape guide comes above the tape cassette, a dead space occurs above the tape cassette, and if it goes below the tape cassette, the thickness of the apparatus increases by an amount protruding downward. With
Dead space also occurs in the thickness range of the tape cassette storage.

In the present embodiment, the tape guides 4 and 5 at the entrance and exit for loading the tape to the rotary head drum 3 are provided with guide rails 6 and 7 inclined in opposite directions after the tape is pulled out.
The rotary head drum 3 is arranged up to the height of the case of the tape cassette by distributing and arranging the tape cassette 2 in the opposite direction from the tape center xx 'of the tape cassette 2, and the tape guide and the like are similarly arranged at the full height of the case. Therefore, it is possible to effectively utilize the space that can be inevitably formed by storing the tape cassette without generating the conventional dead space related to their storage arrangement. In the above description, the distribution of the tape guide positions from the tape center xx ′ is preferably performed evenly from the viewpoint of design and effective use of space in many cases, but is not particularly limited to the uniformity. In addition, the components can be appropriately sorted so as to achieve a total reduction in thickness according to the arrangement and shape of other members, and in that sense, design freedom is obtained.

The above is one embodiment of the present invention, and the present invention is not limited to the embodiment. The present invention can have various applications and embodiments according to the gist.

Although the present embodiment shows an example in which the present invention is applied to an 8 mm VTR, it goes without saying that the present invention can be applied to other types of VTRs and digital recorders. Further, even if the loading by the present apparatus is combined with the conventional M-loading method, the object of the present invention can be achieved by reducing the inclination angle of the rotary head drum in the M-loading method. Other known drive mechanisms for the tape guide can be used.

[Effects of the Invention] As is apparent from the above description, according to the tape loading device of the present invention, the tape guide positions of the entrance and the exit are set in both directions from the tape center of the tape cassette when the tape is loaded on the rotary head drum. Since the sorting is done, the space created for storing the tape cassette can be effectively used for storing the peripheral mechanisms such as the rotating head drum and the tape guide, and the rotating head drum itself is thinned to drive the capstan. Since the height of the motor to be driven is reduced and the plane including the upper end of the capstan housing and the plane including the lower end of the motor driving the capstan, at least the rotary head drum and the tape inlet and outlet guides are located. Thinner. In addition to this reduction in thickness, the inclination of the rotating head drum can be reduced by winding the tape around the rotating head drum, so that the rotating head drum can be inserted into the mouse of the tape cassette. In addition, the effect that can be obtained is obtained.

The distribution amount of the tape guide positions at the entrance and the exit in the above is freely in principle, and the distribution can realize a small and thin mechanism in total. Therefore, the present invention has an effect of giving a degree of freedom even in the design of the mechanism and the like. .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a tape loading device according to an embodiment of the present invention as viewed from a side, FIG. 2 is a schematic configuration diagram of the tape loading device as viewed from above, and FIG. 3 is an exploded perspective view of a tape guide and its moving mechanism. FIG. 4 is an explanatory view of a conventional loading method. 2 ...... tape cassette, 2a ...... tape, 3 ...... rotary head drum, 4 ...... tape entrance guide, 5 ...... tape exit guide, x-x '...... tape center, h _1, h ₂ ...... allocation amount .

Claims (2)

(57) [Claims] 1. A tape loading device for winding a tape of a tape cassette around a peripheral surface of a rotary head drum by a tape inlet guide and a tape outlet guide, wherein the rotary head drum has a rotor having a permanent magnet as a coreless motor and a rotating magnetic field. And a guide position of the tape entrance guide and a guide position of the tape exit guide in the loading state are allotted in opposite directions from the tape center of the tape cassette, and the tape is loaded in the loading state. The rotary head drum is arranged to enter the mouth space of the cassette, and between a plane including an upper end of a capstan housing for housing a capstan for driving a tape and a plane including a lower end of a coreless motor for directly driving the capstan. Less A tape loading device wherein the rotary head drum and the tape inlet and outlet guides are located. 2. The tape loading device according to claim 1, wherein the distribution is uniform from a tape center.