JPH03295058A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable a pinch roller and a guide part to be closely disposed and to increase the degree of freedom in forming a tape path by providing a guide part for forming the tape path in the vicinity of a pinch roller to a movable part mounted with the pinch roller. CONSTITUTION:When the moving chassis 200 is advanced at the time of loading a tape, a pin of a pinch roller arm 260 is moved in contact with a taper of a cam groove on the side of a fixed chassis by energizing of a spring 268, and as a result, the arm 260 is turned clockwise. When the chassis 200 reaches a loading completion position, the pinch roller 262 is pressed via the tape against a shaft of a capstan motor. Since the pinch roller 262 and a slant post 264 as a guide are provided on a tip of the arm 260, the arm 260 is regulated in its turning position by bringing the roller 262 into contact with a capstan shaft via the tape, and consequently, the post 264 is positioned on an X-Y plane.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing device, and particularly to a magnetic recording and reproducing device having a tape rope ink mechanism that winds a magnetic tape around a rotating head drum and forms a predetermined tape path. Regarding equipment.

[Conventional technology]

In general, magnetic recording and reproducing devices such as video tape recorders (VTRs) and digital audio recorders (DATs) employ a so-called helical scanning method in which a tape is wound obliquely around a rotating head drum to record and reproduce data.

Conventionally, various tape running systems have been tried to stabilize and simplify tape running. There are countless variations in the position and inclination of various tape guide members such as posts, the inclination angle of the rotary head drum, the tape wrapping angle, the position of the tape inlet/outlet relative to the inclined rotary head drum, etc.

Further, during tape loading, the pinch roller arm is rotated, and the pinch roller is pressed against the capstan shaft via the tape, so that the tape can run at a constant speed.

By the way, some conventional tape loading mechanisms are designed to move a tape guide member near the pinch roller by a drive arm or the like during loading to form a predetermined tape path.

[Problem to be solved by the invention]

However, since the pinch roller arm and the drive arm on which the tape guide member is placed are each independently driven and positioned, there is a limit to arranging the tape guide member close to the pinch roller. The degree of freedom in tape path formation was restricted.

The present invention has been made in view of the above circumstances, and provides a magnetic recording and reproducing device in which a tape guide member can be placed close to a pinch roller and a tape loading mechanism can be simplified. The purpose is to

[Means to solve problems]

In order to achieve the above object, the present invention includes a tape loading mechanism that moves along a predetermined path during tape loading, pulls out the tape from the cassette, winds it around a rotating head drum, and forms a predetermined tape path; In a magnetic recording/reproducing device having a movable member on which a pinch roller is mounted which presses and releases the tape via the tape, a tape path near the pinch roller is formed on the t-movable member on which the pinch roller is mounted. It is characterized by having a tape guide member mounted thereon.

Further, the tape guide member is an inclined post that is inclined relative to the capstan shaft, and the inclined post is such that when the pinch roller is pressed against the capstan shaft and is elastically deformed, a predetermined tape path is achieved. It is characterized in that it is placed on the movable member in anticipation of the elastic deformation.

[Effect]

According to the present invention, a tape guide member that forms a tape path near the pinch roller is placed on the movable member on which the pinch roller is placed.

This makes it possible to arrange the pinch roller and the tape guide member close to each other, and eliminates the need for a drive arm or the like for independently moving the tape guide member.

In addition, the tape guide member is positioned by the pinch roller pressing against the capstan shaft, but when mounting an inclined post that requires particularly high positioning accuracy as a tape guide member, the pinch roller is pressed against the capstan shaft. In anticipation of the amount of deformation that will occur when it is compressed and elastically deformed, it is offset in advance and placed on the movable member.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the magnetic recording and reproducing apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 and FIG. 2 respectively show a fixed chassis part and a movable/year part of a magnetic recording/reproducing apparatus (certified 8 VTR) according to the present invention.
FIG.

As shown in these drawings, the fixed steering wheel 100 includes:
Rotating head drum 110, capstan motor 120,
A loading motor 13o, a fan-shaped arm 140, a loading ring 150, 160, and arms 170 and 180 on which guide rollers 172 and 182 are mounted, respectively, are provided, and the moving/yaar 7200 is provided with a pair of left and right reel stands 210. 220, arm 230 on which the inclined post 232 is mounted, tension regulator arm 240 on which the guide roller 242 is mounted, kite 0-ra 2
52 is placed on the arm 250, the pinch roller arm 2 on which the pinch roller 262 and the inclined post 264 are placed.
60 etc. are installed.

The moving steering wheel 200 has four guide grooves 201 and 202.
．． 203 and 204 are formed, and these guide grooves 201
．． Guide pins 101.102.103.104 implanted in the fixed chassis 100 are inserted into the guide pins 101.102.103.104, which guide the movable chassis 200 in a direction toward and away from the rotating head drum 110 so as to be freely forward and backward. Ru.

Further, the bins 142 planted in the fan-shaped arm 140 on the fixed chassis side engage with the elongated holes 205 formed in the movable chassis 200, and the bins 234. 254
and 266 are engaged with cam grooves 105, 106 and 107 formed in the fixed chassis 100, respectively.

Next, the operation of each part when loading is performed from the unloading state will be explained.

When the loading motor 130 is rotated in the loading direction, the rotational driving force is transmitted from the gear 131 disposed on the output shaft of the motor to the gear 132, the shaft 133, and the gear 1.
34, 135, 136 to the disk cam 137, and causes the disk cam 137 to move in the counterclockwise direction (CC
(W direction).

Two cam grooves 138 and 139 are formed in the disk cam 137, and the fan-shaped arm 140 with the cam follower 144 engaged with the cam groove 138 rotates the rotation shaft 146 by the rotation of the disk cam 137 in the CCW direction. Rotate in the CCW direction around the center.

A gear 148 is formed on the arc portion of this fan-shaped arm 140, and this gear 148 can transmit driving force to loading rings 150 and 160 via a gear train 149.

Therefore, when the sector arm 140 rotates in the CCW direction,
Loading ring 150 is clockwise (CW direction)
The loading ring 160 rotates in the CCW direction.

In addition, loading bases 153 and 163 are disposed on the loading rings 150 and 160 so as to be movable in the vertical direction via guide shafts 151152 and 161.162 installed vertically on the rings, respectively. are guide roller 154, inclined post 1
55 are provided, and the loading ring base 163 is provided with guide rollers 164 and 165 and an inclined post 166. And loading base 153 and 1
As the rope ink links 150 and 160 rotate, the rope ink link 63 moves on the X-Y plane parallel to the upper surface of the fixed yarn 7100, and also moves in the Z-axis direction guided by a guide groove of the drum base (not shown). , the deso is obliquely wound around a rotary head drum 110 whose drum axis is disposed perpendicularly to the fixed shear 100.

Further, as the fan-shaped arm 140 rotates in the CCW direction, the movable seam 2200 whose elongated hole 205 is engaged with the bin 142 of the fan-shaped arm 140 moves toward the rotary head drum 110.
Move D (forward) in a direction that approaches .

On the other hand, the cam follower 52 is inserted into the cam groove 139 of the disc cam 137.
The engaged cam arm 50 swings as the disk cam 137 rotates, moving the arm 54 in the left-right direction in FIG. 1 and rotating the arm 56 via the arm 54. The arm 54 operates the lock brake gears 212 and 222 (FIG. 2) of the reel stands 210 and 220, and the arm 56 releases the pinch roller 262.

Next, the operation of each part linked to the movement of the moving yarn 200 will be explained.

As the movable shear 200 moves forward as described above, the bin 234 is inserted into the cam groove 105 formed in the fixed chassis 100.
The arm 230 engaged with rotates in the CCW direction about the support shaft 236.

In addition, the tennyon regulation arm 240 is the arm 2
It rotates in conjunction with the rotation of 30.

Here, the tension regulator arm 240 is wrapped around the reel stand 210 and has a cassette positioning bin 2.
44 is fixed, and one end of a spring 246 that urges the arm 240 in the CCW direction is disposed at the lower end of the tension regulator arm 240. The tension regulator arm 240 is designed not to interfere with the arm 230 within a predetermined rotation range for adjusting tape tension.

Further, the arm 250, in which the pin 254 is engaged with the cam groove 106 formed in the fixed steering wheel 100, has a support shaft 256.
Similarly, the pin 266 engages with the cam groove 107 formed in the fixed chassis 100, and a CW force is applied around the support shaft 269 by the pinch roller biasing spring 268. The directionally biased pinch roller arm 260 rotates in the CW force direction when the movable chassis 200 moves forward and the pin 266 slides along the tapered portion of the cam groove 107 . Note that one locking portion of the spring 268 engages with the pin 266, and the other locking portion moves from the side end of the movable chassis 200 to the guide pin 103 on the fixed chassis side while the movable chassis 100 is moving. engage by changing.

Furthermore, when the movable chassis 200 moves forward, the arm 170, which is rotatably disposed on the fixed chassis 110 and is biased by a spring in the CCW direction, is pressed by the arm 230 on the movable chassis side and is subjected to the spring biasing force. Against CV, /
rotate in the direction. Further, the drive arm 1 is rotatably disposed on a support shaft 183 coaxially with a screw for fixing the capstan motor 120, and is biased in the CW force direction by a spring 185.
84 is rotated in the CCW direction by a convex portion 206 at the tip of the movable chassis 200, and is rotatably disposed on a support shaft 187 coaxial with a screw for fixing the capstan motor 120 via a leaf spring 186. The arm 180 that has been rotated is rotated in the cW direction.

Next, the pinch roller arm 260, the pinch roller 262
and the inclined post 264 will be explained in more detail with reference to FIGS. 3 to 5.

3 and 4 are a rear view and a plan view showing the pinch roller arm and the like, respectively. As shown in these drawings, the pinch roller arm 260 has a bearing portion 261 inserted through a support shaft 269 (FIG. 2) installed on the movable chassis 200, and rotates within a plane parallel to the X-Y plane. It is freely arranged. As described above, the pinch roller 262 and the inclined post 264 are placed at the tip of the pinch roller arm 260.

When the movable chassis 200 moves forward during tape loading, the pin 266 of the pinch roller arm 260 is fixed by the biasing force of the spring 268.
107 (FIG. 1), and as a result, the pinch roller arm 260 rotates in the 0w direction in FIG.

When the movable steering wheel 200 advances to the loading completion position, the pinch roller 264
It comes into contact with the capstan shaft 122 of No. 20 via the magnetic tape 60, and is pressed by the biasing force of the spring 268 (FIG. 5). In addition, at this time, the pinch roller arm 260
Needless to say, the pin 266 is spaced apart from the sliding surface of the cam groove 107.

Now, the pinch roller arm 206 is the pinch roller 262.
comes into contact with the capstan shaft 122 via the tape 60, thereby regulating its rotational position, and as a result, the tilted post 264 placed on the pinch roller arm 260
will be positioned on the x-y plane.

By the way, the pinch roller 262 is attached to the capstan shaft 122.
The pinch roller arm 2
60 rotates slightly from the position where the pinch roller 262 contacts the capstan shaft 122 via the tape 60 in accordance with the amount of deformation thereof.

Therefore, the inclined post 264 is offset to take into account the amount of deformation of the pinch roller 262, and the pinch roller foot'
260, and when the pinch roller 262 is pressed and subjected to a predetermined elastic deformation, it can be positioned at a desired position.

In this embodiment, the inclined post 264 is placed on the pinch roller arm 260, but the present invention is not limited to this, and other tape guide members such as a guide roller may be placed on the pinch roller arm 260.

〔Effect of the invention〕

As explained above, according to the magnetic recording and reproducing apparatus according to the present invention, since the tape guide member that forms the tape path near the pinch roller is placed on the movable member on which the pinch roller is placed, the pinch roller This makes it possible to arrange the tape guide member and the tape guide member in close proximity, increasing the degree of freedom in tape path formation, and eliminating the need for a drive arm or the like to independently move the tape guide member near the pinch roller, making tape loading easier. The mechanism can be simplified.

Incidentally, since the tape guide member is placed in consideration of the elastic deformation of the pinch roller, the desired positioning accuracy required of the tape guide member can be achieved.

[Brief explanation of drawings]

1 and 2 are plan views respectively showing an embodiment of a fixed chassis section and a movable chassis section of a magnetic recording/reproducing apparatus according to the present invention, and FIGS. 3 and 4 respectively show the pinch roller arm of FIG. 2. FIG. 5 is a plan view showing a state in which the pinch roller is pressed onto the capstan shaft. 60... Magnetic tape, 110... Rotating head drum, 150.160... Loading ring, 26
0...Pinch roller arm, 261...Bearing part,
262... Pinch roller, 264... Inclined post, 268... Spring, 269... Support shaft.

Claims (2)

[Claims] (1) A tape loading mechanism that moves along a predetermined path during tape loading, pulls out the tape from the cassette, wraps it around the rotating head drum, and forms a predetermined tape path; and In a magnetic recording/reproducing device having a movable member on which a detachable pinch roller is placed, a tape guide member for forming a tape path near the pinch roller is placed on the movable member on which the pinch roller is placed. A magnetic recording/reproducing device characterized by: (2) The tape guide member is an inclined post that is inclined relative to the capstan shaft, and the inclined post allows a predetermined tape path to be formed when the pinch roller is pressed against the capstan shaft and is elastically deformed. The magnetic recording/reproducing device according to claim 1, wherein the magnetic recording/reproducing device is placed on the movable member in anticipation of the elastic deformation.