JP2582220B2 - Tape drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus using a tape such as a VTR as a recording medium, and more particularly to a tape drive suitable for a small and light-weight VTR or the like with a camera.

[0002]

2. Description of the Related Art Conventionally, in a device such as a VTR, main factors governing the size of a mechanism include a size of a tape guide drum, a size of a cassette, and a loading mechanism which are systematically determined. For example, in recent years, a ring-type loading mechanism is becoming the mainstream because a wide-angle winding as a four-head small-diameter drum system is required in correspondence with a VTR-integrated camera such as a VHS-C cassette in recent years. That is, a ring is disposed substantially concentrically around a tape guide drum having a built-in rotary head, a tape guide group is connected to this ring, and the rotation of the ring (tape guide driving member) causes loading and unloading of the tape. It performs loading.

[0003] Such a ring system can easily cope with wide-angle winding on a drum and can reduce the number of parts without requiring a complicated articulated arm, as compared with the conventional arm system. The base on which these mechanisms are mounted is usually configured in a rectangular shape. Related to this type of device is, for example, the structure described in Japanese Patent Application Laid-Open No. 60-18848.

[0004]

In the above prior art, sufficient consideration has not been given to reducing the size and weight of the mechanism, and the mechanism has an unnecessarily large shape because the chassis is rectangular. .

On the other hand, a camera-integrated VTR that requires small size and light weight includes not only a mechanism but also a circuit section and a camera section, and therefore, it is necessary to arrange them as a whole compactly. Therefore, if the mechanism that forms the main shape is a rectangle, this is
This also affects the overall shape of the TR, resulting in an increase in the size of the entire device and an increase in weight.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape drive capable of solving the above-mentioned disadvantages of the prior art, reducing the plane area of the chassis, and reducing the size and weight of the mechanism and the device. To provide.

[0007]

According to the present invention, the following structure is employed to solve the above-mentioned problems. A tape running means having a tape guide means and a capstan axis coaxial with the rotation axis of the capstan motor is disposed on the base, and a cassette containing a tape and compliant with the VHS-C standard is mounted, and A tape drive device configured to draw out the tape from the cassette by the tape guide means to form a tape travel path including a guide drum, and to drive the tape to travel along the tape travel path by the tape travel drive means; Wherein the base has a substantially oblique edge from the vicinity of the guide drum on the side opposite to the side facing the cassette to the vicinity of the tape running drive means, and the tape guide The means comprises a first group of tape guides and a second tape guide, opposite to the side of the guide drum facing the cassette. The innermost peripheral surface of the guide drum is defined as the innermost point of the guide drum, and at least a part of the guide roller in the first tape guide group on the tape exit side of the guide drum is the innermost point of the guide drum. The tape is wound substantially 270 degrees around the guide drum by moving along the outer peripheral surface of the guide drum until it turns around the point or more, cooperating with a tape guide group on the tape entry side of the guide drum, The guide rollers in the first tape guide group are:
On the tape exit side of the guide drum, with respect to the direction of the tape running in contact with the guide drum, the tape is folded substantially in the opposite direction, and the tape is caused to run substantially along the outer periphery of the guide drum, The tape guide 2 is inserted into the cassette opening when the cassette is mounted, and together with the audio control head and the tape running driving means, the first tape guide is formed when the tape running path is formed.
The tape from the tape guide group is caused to travel along the outer periphery of the guide drum between the guide drum and the peripheral portion so as to guide the tape in the direction of the cassette. Wherein the first tape guide group is positioned substantially below the tape guide group on the entry side of the guide drum by a tape width when the tape running path is formed.

[0008]

A tape guide means and a tape running drive means having a capstan shaft coaxial with the rotation axis of the capstan motor are arranged on a base, and the guide in the first tape guide group is provided on the tape exit side of the guide drum. At least a portion of the roller moves substantially along the outer peripheral surface of the guide drum until the roller goes around the innermost point of the guide drum, thereby cooperating with the tape guide group on the tape entry side of the guide drum. Then, the tape is wound around the guide drum by approximately 270 degrees, and the guide roller in the first tape guide group turns the tape in a direction substantially opposite to the direction of the running tape so that the tape runs substantially along the outer periphery of the guide drum. To form a tape running path, so that the guide drive on the base is opposite to the side facing the cassette. It can be from the side near the provided edges of the substantially diagonal shape in a direction F towards the vicinity of the tape running driving means. For this reason, the plane area of the base can be sufficiently reduced by the provision of the peripheral portion, and as a result, the entire apparatus can be downsized. Further, the first tape guide group on the exit side of the guide drum is positioned substantially below the tape guide group on the entry side of the guide drum by a tape width when the tape traveling path is formed, so that the tape guide drum Can be reduced, and the size of the device can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a plan view showing a loading state of a magnetic recording / reproducing apparatus using an embodiment of a tape drive according to the present invention, wherein 1 is a chassis, and 2 is equipped with a rotating magnetic head (not shown). A tape guide drum on which the tape 6 is wound obliquely at a predetermined angle; 3, a cassette containing the tape 6 wound on the supply reel 4 and the take-up reel 5;
Reference numeral 7 denotes a capstan directly connected to a motor 9 at the lower end, reference numeral 8 denotes a pinch roller, reference numeral 10 denotes an erasing head for erasing the entire width of the tape 6, and reference numeral 11 records and reproduces audio signals and control signals at the upper and lower ends of the tape 6. audio·
Control head.

In FIG. 1, when the cassette 3 is mounted on the apparatus, the lid 12 on the front face of the cassette 3 is opened. A tension pin 16, a guide roller 17 and an inclined pin 18 are provided in the opening 13 of the cassette 3, and a guide roller 19 and an inclined pin 20 are provided in the opening 14 of the cassette 3. Are inserted at the positions where the inclined pin 21 and the capstan 7 are indicated by broken lines and solid lines, respectively. At this time, the pinch roller 8 is also at the position shown by the broken line.

When a loading operation is performed, each guide moves while pulling out the tape 6. The guide roller 17 and the inclined pin 18 together form a first guide roller group, which moves horizontally as a pair and is positioned near the illustrated tape guide drum 2. Further, the guide roller 19 and the inclined pin 20 together form a second guide roller group, which moves as a pair horizontally to the vicinity of the audio control head 11, and then moves obliquely downward therefrom. The guide drum 2 is positioned near the side substantially opposite to the cassette 3 side. By positioning the first and second guide roller groups in this manner, the tape 6 is wound around the tape guide drum 2 by approximately 270 °.

[0013] Here, the second position is determined as described above.
The position of the guide roller group is set outside the chassis 1, so that the second guide roller group positioned in this way can be arranged at a position lower than the chassis 1 surface, and this is placed on the chassis 1. , The height of the entire device can be reduced.

The tilting pin 21 moves horizontally from behind the tilting pin 20 and is fixed upstream of the audio control head 11, whereby the attitude of the tape 6 is corrected and guided to the take-up reel 5.

As a result, the tape 3 is spirally wound around the tape guide drum 2 through the tension pin 16, the height regulating guide 22, the erasing head 10, the guide roller 17, and the inclined pin 18 from the cassette 3 at a predetermined angle. 19, an inclined pin 20, an inclined pin 21, a fixed guide 23, an audio control head 11, a height regulating guide 24, a fixed guide 25, and a take-up reel through a portion sandwiched between the capstan 7 and the pinch roller 8. 5, a running path of the tape 6, that is, a running path of the tape 6 is formed. Here, on the tape running path, on the tape exit side of the tape guide drum 2, the tape 6 is folded substantially in the opposite direction by the illustrated guide roller 19 and the inclined pin 20, and the tape runs along the vicinity of the tape guide drum 2. The tape guide drum 2 is formed so as to run along the tape guide drum 2 as far as possible in the direction of the capstan. When the capstan 7 is driven to rotate, the tape 6 travels along the tape traveling path.

Further, since the tape running path on the tape exit side of the tape guiding drum 2 is formed as described above, the tape running comprising the capstan 7, the pinch roller 8, and the motor 9 from the vicinity of the tape guiding drum 2. Since a portion outside the tape running path of the chassis 1 up to the vicinity of the drive means can be made an empty space, the tape drive from the side near the tape guide drum 2 is performed in the chassis 1 except for this empty space portion. A slanted outer portion 1a is formed over the side near the means, and the exit side of the tape running path is formed substantially along the slanted outer portion 1a. As a result, the area of the chassis 1 can be reduced, and the size of the entire apparatus can be reduced.
Since the tape running path can be shortened, the friction applied to the tape 6 can be reduced.

FIG. 2 is a side view showing a state at the time of completion of loading, and FIG. 3 is a side view showing a state at the time of completion of unloading. Parts corresponding to FIG. 1 are denoted by the same reference numerals.

In FIG. 2, reference numeral 26 denotes a guide base on which a guide roller 17 and an inclined pin 18 are erected and are positioned and held by a catcher 28. 27 is also a guide base, on which the guide roller 19 and the inclined guide 20 are erected, and similarly positioned and held by the catcher 28.

As shown in the figure, the tape guide on the output side of the tape guide drum 2 descends largely by the tape width as compared with the input side. Thereby, the tape guide drum 2
The tape guide drum 2 can be arranged under the front lid 12 that opens forward of the cassette 3 when the cassette 3 is mounted by reducing the inclination angle of the cassette 3 and arranging the tape guide drum 2 at a position slightly lower than the cassette 3. It is designed to be smaller and lighter.

Here, the loading mechanism in the magnetic recording / reproducing apparatus shown in FIG. 1 will be described in detail.

FIG. 4 is a perspective view showing the guide moving member on the exit side of the loading mechanism. In the figure, a guide base 2 on which a guide roller 19 and an inclined pin 20 are erected is shown.
7 is supported by a connecting plate 29 rotatably in a plane as indicated by an arrow in the figure, and this connecting plate 29 is also rotatably connected in a plane as indicated by another arrow. Supported by 30. Further, as shown by another arrow, the connecting plate 30 is supported by one end of the output side driving member 31 so as to swing freely in the vertical direction. The exit side driving member 31 has an arc shape, and a gear portion 31a is provided on an outer periphery thereof.

FIG. 5 is a perspective view showing a guide moving member on the entry side of the loading mechanism. In the figure, a guide base 2 on which a guide roller 17 and an inclined pin 18 are planted is shown.
Reference numeral 6 denotes a connecting plate 3 rotatably in a plane as indicated by an arrow.
2 and the connecting plate 32 is connected to the input side driving member 3
As shown by another arrow, it is rotatably supported by a U-shaped portion 33b provided at one end of the third. Exit drive member 31
Is located inside the U-shaped portion 33b, that is, the entry side driving member 33
The two driving members do not collide with each other or the driving member and the guide group do not collide with each other during the movement. The entry side driving member 33 is also formed in a circular arc shape, and a gear portion 33a is provided on the outer periphery thereof.

FIG. 6 is a perspective view showing the cam 34 of the loading mechanism. In the same figure, the cam 34 is composed of two upper and lower stages, the upper stage includes a gear portion 34a and a cam portion 34b from the left, and the lower stage includes a stopper surface 34b corresponding to a Geneva gear (described later), There are a cam portion 34c corresponding to the mode operation, a cam portion 34f corresponding to the middle of loading / unloading, and a cam portion 34e corresponding to the mode operation after the unloading, and has an arc shape as a whole. These are arranged on the chassis 1 concentrically from the top in the order of the output drive member 31, the input drive member 33, and the cam.

FIG. 7 is a plan view showing a mechanism for moving the inclined pin 21 disposed on the exit side of the loading mechanism.

In the same figure, the gear portion of the support roller 67d engaged with the gear portion of the output side driving member 31 is provided with a gear 6
9 and is integrated with the gear 69 to about 1 /
The gear 70, which is reduced to two, passes through the gears 71 and 72 and the gear 73.
It is connected to. Therefore, the rotation of the output side drive member 31 is transmitted to the gear 73 via these gears, and the gear 73 is driven to rotate. At this time, the rotation is reduced to about ２ by the gears 69 and 70. The gear 73 is coaxially engaged with the arm 74 via a crimp spring (not shown), and moves the inclined pin 21 implanted at the tip of the arm 74 to a predetermined position defined by the catcher 75 to crimp. I do.

It should be noted that the inclined pin 21
, The inclined pin 21 is loaded following the guide base 27 from behind. That is, since the movement trajectories of the inclined pin 21 and the guide base 27 partially overlap, when the guide base 27 passes through the overlap portion in advance, the output side driving member 31 and the support roller 67d are engaged. The position of the support roller 67d and the reduction ratio of the arm 74 drive system are set so as to drive the inclined pin 21. Accordingly, since the movement of the arm 74 is controlled by the movement of the exit side driving member 31, there is no interference at the overlap portion. Further, the support of the output side driving member 31 and the transmission of the driving force are performed by one support roller 67d, so that the number of parts can be reduced.

[0027]

As described above, according to the present invention,
Although the tape pulled out from the VHS-C cassette on the tape exit side of the guide drum is wound around the guide drum farther than the rotation center of the guide drum as viewed from the cassette side, the tape exit By providing the first tape guide group including the guide roller and the second tape guide on the side, a tape traveling drive unit having a capstan shaft coaxial with the rotation axis of the capstan motor is also employed. As a result, the tape can be folded back in the opposite direction without difficulty at the tape exit side of the guide drum (by adopting the guide roller), so that the tape running path follows the guide drum, and the base has a substantially oblique shape. A peripheral portion can be formed, and at the same time, the oblique angle of the peripheral portion toward the tape running drive means disposed at the cassette opening portion is made more acute. The flat area of the base on which each mechanism element of the mechanism is mounted can be minimized, and the tape drive mechanism can be made smaller and lighter, and the whole device can be made smaller and lighter easily. it can. Also, the first tape guide on the exit side of the guide drum is
When the tape running path is formed, the tape guide drum is positioned almost below the tape guide on the entry side of the guide drum by the width of the tape, so that the inclination angle of the tape guide drum can be reduced, and the apparatus can be downsized. I have.

[Brief description of the drawings]

FIG. 1 is a plan view showing a magnetic recording / reproducing apparatus to which an embodiment of a tape drive according to the present invention is applied.

FIG. 2 is a side view showing a state when loading of the magnetic recording / reproducing apparatus shown in FIG. 1 is completed.

FIG. 3 is a side view showing a state at the time of unloading of the magnetic recording / reproducing apparatus shown in FIG. 1;

4 is a perspective view showing an output side tape guide driving member and a tape guide group of a loading mechanism in the magnetic recording / reproducing apparatus shown in FIG. 1;

FIG. 5 is a perspective view showing an entry-side tape guide driving member and a tape guide group of a loading mechanism in the magnetic recording and reproducing apparatus shown in FIG. 1;

FIG. 6 is a perspective view showing a mode operation unit using a cam member of a loading mechanism in the magnetic recording and reproducing apparatus shown in FIG. 1;

7 is a plan view showing an output side inclined pin driving mechanism of a loading mechanism in the magnetic recording and reproducing apparatus shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chassis 1a Slant external part 2 Tape guide drum 3 Cassette 4 Supply reel 5 Take-up reel 6 Tape 7 Capstan 8 Pinch roller 17, 19 Guide roller 18, 20, 21 Inclined pin 26, 27 Guide base 28 Catcher (tape guide) Positioning mechanism) 31 Outgoing side (second) tape guide driving member 33 Inlet side (first) tape guide driving member 34 Cam member

Claims (1)

(57) [Claims] 1. A tape traveling means having a tape guide means and a capstan axis coaxial with a rotation axis of a capstan motor is disposed on a base, and a cassette accommodating a tape and conforming to the VHS-C standard is accommodated. The tape is pulled out from the cassette by the tape guide means, and a tape running path including a guide drum is formed. The tape running drive means drives the tape along the tape running path. In the tape drive device having the above configuration, the base has a substantially oblique edge from a side near the guide drum opposite to a side facing the cassette to a direction near the tape traveling drive unit. The tape guide means includes a first tape guide group and a second tape guide group.
The first tape guide on the tape exit side of the guide drum, with the innermost peripheral surface of the guide drum opposite to the side facing the cassette as the innermost point of the guide drum. A tape guide group on the tape entry side of the guide drum by at least part of the guide rollers in the group being moved substantially along the outer peripheral surface of the guide drum until the guide roller goes beyond the innermost point of the guide drum. Works together with the tape on the guide drum
The guide roller in the first tape guide group is folded back substantially opposite to the direction of the tape running in contact with the guide drum on the tape exit side of the guide drum. The tape is caused to travel substantially along the outer circumference of the guide drum. The second tape guide is inserted into the cassette opening when the cassette is mounted, and the audio control head and the tape are inserted when the tape travel path is formed. Along with the traveling drive means, the tape from the first tape guide group is caused to travel along the outer circumference of the guide drum between the guide drum and the peripheral portion so as to guide the tape in the direction of the cassette. The first tape guide group on the tape exit side of the guide drum is used to form the guide drum when the tape running path is formed. Positioned below only about the tape width of than the tape guide group entry side of the tape drive, characterized in that.