JPH07210958A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To freely rotatably support a pinch roller arm having a pinch roller on a main base when a slide base for loading a tape cassette is provided. CONSTITUTION:A tape cassette 1 is loaded on a slide base 41 and when a tape is loaded, a magnetic tape T is pulled out of the tape cassette 1 by means of a plurality of tape loading members and a pinch roller 23 standing by in a loading pocket 2a formed in a cassette casing 2. The tape cassette 1 is moved integrally with the slide base 41 in the direction of a rotatry drum 12 provided on a main base 11 and a part of the rotatry drum 12 having the pulled out magnetic tape T wound thereon is inserted into the loading pocket 2a. At the same time, the magnetic tape T is travelled held between a capstan 13 provided on the main base 11 and the pinch roller 23 erected on the tip of a pinch roller arm 22 rotatably supported on the main base 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a tape cassette accommodating a magnetic tape from above a slide base which is movable along a main base, and the tape cassette is integrated with the slide base in a rotating drum direction. In a magnetic recording / reproducing apparatus constructed by moving a part of a rotating drum into a tape cassette by moving it to a tape cassette, in particular, a magnetic recording / reproducing device configured to rotatably support a pinch roller arm having a pinch roller on a main base. The present invention relates to a recording / reproducing device.

[0002]

2. Description of the Related Art In recent years, video tape recorders (VT
Magnetic recording / reproducing devices such as R) and rotary digital audio tape recorders (R-DAT) have been remarkably reduced in size and weight for both stationary and portable types. Along with this, the tape cassette used in the magnetic recording / reproducing apparatus has been downsized, and further, high density recording / reproducing on the magnetic tape has been attempted.

Generally, in the above magnetic recording / reproducing apparatus, a tape cassette is used in which a magnetic tape is accommodated while being stretched in front of a loading pocket formed in the cassette housing. It is well known that while a magnetic tape is spirally wound around a rotary drum provided with a head at a predetermined angle, a rotating magnetic head helically scans to record and reproduce.

By the way, in the above magnetic recording / reproducing apparatus, a tape cassette is mounted from above a slide base which is movable along a main base, and the tape cassette is moved integrally with the slide base in the direction of the rotary drum. Japanese Patent Laid-Open No. 5-258416 discloses a conventional magnetic recording / reproducing apparatus in which a part of a rotary drum on the apparatus side is inserted into a tape cassette to reduce the size of the apparatus.

FIG. 4 is a block diagram for explaining a conventional magnetic recording / reproducing apparatus, (A) showing a tape unloading state, (B) showing a tape loading completion state, and FIG. Is a conventional magnetic recording and reproducing device,
It is a side view for explaining a capstan provided on a main base and a pinch roller erected on a pinch roller arm rotatably supported on a slide base.

In the conventional magnetic recording / reproducing apparatus (hereinafter referred to as apparatus) 110 shown in FIG. 4A, the tape cassette 10 is provided on the front side of the main base 111 which is a base.
Slide base assembly 13 for mounting 0 from above
0 is provided slidably along the main base 111. In the slide base assembly 130, the slide base 131 is connected to a pin 112a fixed to a rotatable arm gear 112 by a drive source on the main base 111 side, and a rotary drum 120 described later from a cassette mounting position.
Is provided slidably in the direction (arrow direction), and a supply reel base 132 and a take-up reel base 133 are provided on the slide base 131 so as to be rotatable at appropriate times. Here, when the slide base assembly 130 reaches the cassette mounting position as illustrated, the slide base 13
The front end portion 131a of No. 1 is the front end portion 11 of the main base 111.
It projects forward from 1a.

When the tape cassette 100 is mounted from above the slide base assembly 130, the supply reel 102 in the cassette housing 101 in which the magnetic tape T is stored.
The take-up reel 103 is fitted into the supply reel base 132 and the take-up reel base 133, respectively, and the magnetic tape T ejected from the supply reel 102 in the tape unloading state.
Are wound around a supply reel and a take-up side guide poles 104 and 105 provided on the front surface in the cassette housing 101 and wound on a take-up reel 103. In addition, the cassette housing 101
A loading pocket 101a having a large bottom surface is formed in front of the loading side guide pole 104 and the winding side guide pole 105, and the magnetic tape T is placed in the front portion of the loading pocket 101a. It is stretched. In the loading pocket 101a of the cassette housing 101, a plurality of tape loading members and pinch rollers for pulling out the magnetic tape T to a predetermined tape path outside the tape cassette 100 are waiting at a plurality of illustrated positions.

The plurality of tape loading members are roughly divided into a supply side and a winding side. On the supply side, the tension pole 13 rotatably supported on a slide base 131.
4 and a first tape guide 114 supported by a first loading base 113 that is movable to the left of the rotary drum 120 on the main base 111.
It goes into 01a.

On the other hand, on the take-up side, a second tape guide 116 supported by a second loading base 115 which is movable to the right of the rotary drum 120 on the main base 111.
And a capstan 127 described later on the main base 111.
A third tape guide 118 supported by a third loading base 117 which is movable in the back of the slide base 1.
A pinch roller 135 and a tick-up guide pole 138, which are rotatably supported on 31, enter into the loading pocket 101a.

In the back of the main base 111,
A rotary drum 120 integrally provided with a magnetic head 119 is rotatably provided, and on the left main base 111 with the rotary drum 120 as a center, a first supply side drum is provided.
First guide for guiding the first loading base 113 supporting the tape guide 114 to the left of the rotary drum 120.
A guide groove 121 is formed. On the other hand, the rotating drum 12
A second guide groove for guiding the second loading base 115, which supports the second tape guide 116 on the winding side, to the right of the rotating drum 120 on the main base 111 on the right side of 0. 122 and the third loading base 117 supporting the third tape guide 118 are attached to the capstan 1
A third guide groove 123 for guiding the inside of 27 is formed.

Further, on the main base 111, a supply side inclined pole 124 and a supply side tape guide 125 which is inclined and attached are provided near the end of the first guide groove 121 on the inlet side of the rotating drum 120. In addition, the take-up side inclined pole 126 is provided on the inlet / outlet side of the rotary drum 120 so that the third guide groove 12
It is provided near the end of 3. These tape guide members 125 to 127 cooperate with each other when the above-mentioned first to third tape guides 114, 116 and 118 are moved inward, and wind the magnetic tape T spirally along the rotary drum 120. It has a function to correct the traveling direction.

Further, on the main base 111, a capstan 127 that runs while holding the magnetic tape T between the pinch roller 135 is provided downstream of the winding side inclined pole 126 to the right of the third guide groove 125. It is rotatably installed in the back.

While the tape is being unloaded, the magnetic tape T is pulled out in the direction of the rotary drum while moving the tape loading member, which has been inserted into the loading pocket 101a of the tape cassette 100, to the outside of the tape cassette 100, and the slide base assembly. Thirteen
When the tape cassette 100 is moved in the direction of the rotary drum integrally with 0, a part of the rotary drum 120 enters the loading pocket 101a as shown in FIG. While a predetermined tape path as shown in the drawing is formed while being spirally wound around the magnetic tape T, the magnetic tape T is attached to the capstan 127 and the slide base 1 on the main base 111.
Recording and reproduction are performed by a magnetic head 119 that travels while being sandwiched by the pinch roller 135 on 31 and rotates integrally with the rotary drum 120. At this time, the slide base assembly 130 moves in the direction of the rotary drum, so that the front end portion 131a of the slide base 131 moves toward the main base 1.
11 does not project from the front end portion 111a, so that the depth dimension of the device 110 can be shortened and the device can be downsized.

[0014]

In the conventional device 110 described above, the slide base assembly 130 (slide base 1) for mounting the tape cassette 100 is used.
31), a part of the rotary drum 120 can be inserted into the tape cassette 1, so that the depth dimension of the device 110 can be set short, but the magnetic tape T is enlarged as shown in FIG. A pinch roller 135 for traveling around is rotatably supported on the slide base 131.

That is, as shown in FIG. 5, on the slide base 131, a pinch roller arm 136 having a pinch roller 135 erected at its tip is rotatably supported around a shaft 137 fixed on the slide base 131. When the tape is loaded, the pinch roller 135 moves integrally with the slide base 131 in the arrow direction (rotating drum direction), so that the pinch roller 135 is pressed against the capstan 127 provided on the main base 111.

However, the pinch roller arm 136
Since the shaft 137 serving as the pivot fulcrum of is supported on the slide base 131, the length L ₁ of the shaft 137 is shortened, and it is difficult to obtain the accuracy of tilting the pinch roller 135 with respect to the capstan 127. Since 135 cannot be pressed uniformly onto the capstan 127, there is a problem that the running of the magnetic tape T becomes unstable. Further, since the pinch roller arm 136 is supported on the movable slide base 131, the capstan 127 of the pinch roller 135 is repeatedly moved by the repeated movement of the slide base 131.
There is also a problem that the state of crimping to is changed.

Therefore, in a structural form using a slide base for mounting a tape cassette, a magnetic recording / reproducing apparatus employing a pinch roller supporting structure in which the pinch roller is always in good pressure contact with a capstan is desired. There is.

[0018]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and uses a tape cassette in which a magnetic tape is stored while being stretched over a front portion of a loading pocket formed in a cassette housing, and When a slide base movable along the main base is mounted on a cassette, the front end of the slide base is brought to a cassette mounting position protruding from the front end of the main base, and
At this cassette mounting position, the tape cassette is mounted from above the slide base, and at the time of tape loading, the magnetic tape is pulled out of the tape cassette by a plurality of tape loading members and pinch rollers that are waiting in the loading pocket. The tape cassette is moved integrally with the slide base in the direction of the rotary drum provided on the main base, and a part of the rotary drum around which the magnetic tape that has been drawn is wound is inserted into the loading pocket. In a magnetic recording / reproducing apparatus that runs while holding a magnetic tape between a capstan provided on the main base and the pinch roller, a pinch roller arm having the pinch roller is rotatably supported on the main base. I configured There is provided a magnetic recording and reproducing apparatus according to symptoms.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic recording / reproducing apparatus according to the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a configuration diagram for explaining a magnetic recording / reproducing apparatus according to the present invention, and is a plan view showing a tape unloading state, and FIG. 2 is a main base of the magnetic recording / reproducing apparatus. A side view for explaining a provided capstan and a pinch roller erected on a pinch roller arm rotatably supported on a main base,
FIG. 3 is a plan view showing a tape loading completion state in the magnetic recording / reproducing apparatus.

The magnetic recording / reproducing apparatus 10 according to the present invention shown in FIG. 1 uses a tape cassette 1 in which a magnetic tape T is stored while being stretched over a front portion of a loading pocket 2a formed in a cassette housing 2. The tape cassette 1 is mounted from above a slide base 41 that is movable along the main base 11, and a plurality of tape loading members 19, 20, 24, 26, 28, 46 that stand by in a loading pocket 2a during tape loading.
While pulling the magnetic tape T out of the tape cassette 1 by the pinch roller 23, the tape cassette 1 is moved integrally with the slide base 41 toward the rotary drum 12 provided on the main base 11 to pull out the magnetic tape T. A part of the wound rotary drum 12 is inserted into the loading pocket 2a, and the magnetic tape T is provided on the main base 11 and the capstan 13 and the main base 1 are provided.
The pinch roller arm 22 is rotatably supported above the pinch roller arm 22.

As shown in FIG. 1, the magnetic recording / reproducing apparatus 10
The main base 11 serving as a base is formed on a flat surface using a sheet metal member such as an aluminum plate. A slide base assembly 40 for mounting the tape cassette 1 is provided on the front side of the main base 11 so as to be movable in the depth direction of the apparatus 10 (arrows X ₁ and X ₂ directions).

The tape cassette 1 used here is also used.
In a rectangular cassette housing 2, a magnetic tape T is wound and stored between a supply reel 3 and a take-up reel 4. Further, a loading pocket 2a is formed in the front of the cassette housing 2 by removing a large amount of the bottom surface side thereof, and a magnetic tape T wound between both reels 3 and 4 is formed at a front portion of the loading pocket 2a. The front tape path TP ₁ is formed as illustrated while the tape is unloaded while being stretched.

When the slide base assembly 40 reaches the cassette loading device in the initial state, the front end portion 41a of the movable slide base 41 projects toward the front side from the front end portion 11a of the main base 11, and,
The tape cassette 1 mounted from above the slide base 41 by the cassette mounting device is moved integrally with the slide base 41 from the cassette mounting position in the rotating drum direction (arrow X ₁ direction) into the tape cassette 1 along with the tape loading operation. A part of the rotary drum 12 is made to enter.

A rotary drum 12 provided with a rotary head (not shown) is rotatably provided on the back side of the main base 11, and a capstan 13 is rotatably provided on the right side of the rotary drum 12. It is provided.

The slide base 41 is formed by appropriately bending the periphery using a sheet metal member such as an aluminum plate. Sliding grooves 41b to 41e are formed in the slide base 41 in the front, rear, left and right, and pins 14 to 17 fixed to the front, rear, left and right of the main base 11 are fitted in the sliding grooves 41b to 41e. By fitting them together, the slide base 41 is guided in the directions of the arrows X ₁ and X ₂ . At this time, although a drive source for moving the slide base 41 is not shown, the slide base 41 is movable in the directions of the arrows X ₁ and X ₂ by being connected to a slide base driving lever driven by a cam gear or the like. Has become.

Further, on the slide base 41, supply and take-up reel bases 42 and 43 are provided so as to be selectively rotated, and these supply and take-up reel bases 4 are provided.
The supply and take-up reels 3 and 4 in the tape cassette 1 are fitted into the tapes 2 and 43, respectively, and the tape cassette 1 is mounted on the slide base 41.

A notch 41f is formed in a concave shape on the side of the slide base 41 which faces the rotary drum 12 in the back, and the notch 41f is formed in front of the cassette housing 2. Notches are formed corresponding to the pockets 2a, and the notches 41f are separated from the rotary drum 12 when the slide base 41 reaches the cassette mounting position. And
When the tape is unloaded when the slide base 41 reaches the cassette mounting position, a plurality of tape loading members 19, 20, 24, 26, 28, 46 and a pinch roller 23, which will be described later, are provided in the cutout portion 41f of the slide base 41 and in the cassette housing. Body 2 loading pocket 2
faces the magnetic tape T to form a front tape path TP ₁ enters into a, and, when the tape loading completes the slide base 41 is moved in the rotary drum direction, one rotary drum 12 winding the magnetic tape T The portion is adapted to be inserted into the cutout portion 41f of the slide base 41 and the loading pocket 2a of the cassette housing 2.

The plurality of tape loading members described above are roughly divided into a supply side and a winding side. On the supply side, a tension arm 45 rotatably supported on a slide base 41 about a shaft 44 is provided. A tension pole 46 provided upright at the tip and a first tape guide 19 supported by a first loading base 18 movable leftward of the rotary drum 12 along a first guide groove (not shown) on the main base 11.
Also, the inclined pole 20 is inserted in the notch portion 41f of the slide base 41 and the loading pocket 2a of the cassette housing 2. On the other hand, on the take-up side, a pinch roller 23 erected at the tip of a pinch roller arm 22 rotatably supported on the main base 11 about a shaft 21.
And a guide pole 24, a second tape guide 26 supported on a second loading base 25 that is movable to the right of the rotary drum 12 along a second guide groove (not shown) on the main base 11, and a main base. 11 not shown on the third
A third tape guide 28 supported by a third loading base 27 movable along the guide groove to the inner side of the capstan 13 and a third tape guide 28 inside the cutout portion 41f of the slide base 41 and the loading pocket 2a of the cassette housing 2. It is inside.

Further, on the supply side on the main base 11,
A guide pole 29 is installed on the left side of the rotating drum 12,
Moreover, on the winding side on the main base 11, an inclined pole 30 is installed behind the capstan 128.

Here, the pinch roller support structure forming the essential part of the present invention will be described in more detail. That is, the shaft 21 that rotatably supports the pinch roller arm 22 has one end fixed to the main base 11 and the other upper end formed to the left of the slide base 41, as shown in FIG. By projecting from above the escape hole 41g to above the slide base 41, the length L ₂ of the shaft 21 is set longer than that described in the conventional example. The pinch roller arm 22 has a pinch roller 23 and a guide pole 2 at the tip.
4 is erected, and the upper arm portion 22a extending on the slide base 41 and the other end of the upper arm portion 22a are caulked, enter the escape hole 41g of the slide base 41, and fit into the shaft 21. The bearing boss portion 22b and the lower arm portion 22c obtained by crimping the bearing boss portion 22b on the main base 11 side are integrally formed. At this time, the lower arm portion 22c of the pinch roller arm 22 is connected to a cam gear (not shown) provided on the main base 11 side so that the slide base 41 moves in the arrow X ₁ direction (rotating drum direction). Upon completion, the pinch roller arm 22 is rotated counterclockwise about the shaft 21 so that the pinch roller 23 is pressed against the capstan 12 provided on the main base 11.

Next, the operation of the magnetic recording / reproducing apparatus 10 configured as described above will be briefly described.

First, as shown in FIG. 1, the front end portion 41a of the slide base 41 is projected from the front end portion 11a of the main base 11 when the cassette is mounted.
Here, from above the slide base 41, the tape cassette 1
Put on. In this case, magnetism loading of the plurality in the pocket 2a tape loading members 19,20,24,26,28,46 and the pinch roller 23 which is formed in front of the cassette housing 2 is formed a front tape path TP ₁ while waiting It faces the tape T.

Thereafter, while the magnetic tape T is pulled out of the tape cassette 1 by the tape loading members 19, 20, 24, 26, 28, 46 and the pinch roller 23 from the state shown in FIG. 3, when the tape loading is completed after the tape loading members 19, 20, 24, 26, 28, 46 and the pinch roller 23 have respectively moved to predetermined positions, the drawn magnetic tape T is wound, as shown in FIG. A part of the rotary drum 12 is made to enter the notch portion 41f of the slide base 41 and the loading pocket 2a of the cassette housing 2, and the magnetic tape T is provided on the main base 11 and the capstan 13 and the main base 11 are provided. A pin erected at the tip of a pinch roller arm 21 which is rotatably supported above While sandwiched between the roller 23 running along a tape running path TP ₂ shown in FIG.

As described above, in the structural form using the slide base 41 for mounting the tape cassette 1, the pinch roller arm 22 in which the pinch roller 23 is erected at the tip is rotatably supported on the main base 11. By doing so, the length L ₂ of the shaft 21 that serves as the rotation fulcrum of the pinch roller arm 22 can be set to be longer than that described in the conventional example, whereby the capstan 13 of the pinch roller 23 can be set.
Since it is possible to accurately obtain the inclination accuracy to and the pinch roller 23 can be uniformly pressed against the capstan 13,
The running of the magnetic tape T becomes stable. Further, since the crimping operation of the pinch roller 23 is not influenced by the movement of the slide base 41, the repeated crimping operation can be performed without any change, and the crimping state of the pinch roller 23 to the capstan 13 is always good. Of course, in order to mount the tape cassette 1, the slide base assembly 40 (slide base 4
By providing 1), a part of the rotary drum 12 can be inserted into the tape cassette 1, so that the depth dimension of the magnetic recording / reproducing apparatus 10 can be set short as in the conventional case.

[0036]

According to the magnetic recording / reproducing apparatus according to the present invention described in detail above, a tape cassette in which a magnetic tape is accommodated while being stretched over a front portion of a loading pocket formed in the cassette housing is used. Mounted from above the slide base that can move along the main base, and pulling the magnetic tape out of the tape cassette by a plurality of tape loading members and pinch rollers that were waiting in the loading pocket during tape loading, and integrated with the slide base. The tape cassette is moved in the direction of the rotating drum provided on the main base, and a part of the rotating drum around which the drawn magnetic tape is wound is inserted into the loading pocket, and the magnetic tape is provided on the main base. And is pivotally supported on the main base Since it is configured to travel while being pinched by the pinch roller that is erected on the pinch roller arm, as a result, the length of the shaft that serves as the fulcrum of rotation of the pinch roller arm can be set longer than that described in the conventional example. As a result, the accuracy of tilting the pinch roller to the capstan can be accurately obtained, and the pinch roller can be evenly pressed against the capstan, so that the running of the magnetic tape becomes stable. Further, since the pinch roller crimping operation is not affected by the movement of the slide base, the repeated crimping operation can be performed without change, and the pinch roller crimping state to the capstan is always good. Of course, by providing the slide base for mounting the tape cassette, a part of the rotary drum can be inserted into the tape cassette, so that the depth dimension of the magnetic recording / reproducing apparatus can be set short as in the conventional case.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining a magnetic recording / reproducing apparatus according to the present invention and is a plan view showing a tape unloading state.

FIG. 2 shows the same magnetic recording / reproducing apparatus according to the present invention.
It is a side view for explaining a capstan provided on the main base and a pinch roller erected on a pinch roller arm rotatably supported on the main base.

FIG. 3 is a plan view showing a tape loading completion state in the magnetic recording / reproducing apparatus according to the present invention.

FIG. 4 is a configuration diagram for explaining a conventional magnetic recording / reproducing apparatus.

FIG. 5 is a side view for explaining a capstan provided on a main base and a pinch roller erected on a pinch roller arm rotatably supported on a slide base in a conventional magnetic recording / reproducing apparatus. Is.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tape cassette, 2 ... Cassette housing, 2a ... Loading pocket, 10 ... Magnetic recording / reproducing apparatus, 11 ... Main base, 11a ... Front end part, 12 ... Rotating drum, 13 ...
Capstan, 19 ... First tape guide, 20 ... Inclined pole, 21 ... Shaft, 22 ... Pinch roller arm, 23 ... Pinch roller, 24 ... Guide pole, 26 ... Second tape guide, 28 ... Third tape guide, 46 ... tension pole, 19, 20, 24, 28, 46 ... tape loading member, 41 ... slide base, 41a ... front end, T ...
Magnetic tape.

Claims (1)

[Claims] 1. A tape cassette in which a magnetic tape is stretched and housed in a front portion of a loading pocket formed in a cassette housing, and a slide base movable along a main base is mounted when the cassette is mounted. Bring the front end of the base to the cassette mounting position that protrudes from the front end of the main base, and mount the tape cassette from above the slide base at this cassette mounting position, and wait in the loading pocket when loading the tape. While pulling the magnetic tape out of the tape cassette by the plurality of tape loading members and the pinch rollers, the tape cassette is moved integrally with the slide base toward the rotary drum provided on the main base and pulled out. Wrapped the magnetic tape A magnetic recording / reproducing apparatus that allows a part of a rotary drum to enter the loading pocket and allows the magnetic tape to travel while being sandwiched between a capstan provided on the main base and the pinch roller, the pinch roller being provided. A magnetic recording / reproducing apparatus characterized in that a pinch roller arm is rotatably supported on the main base.