JPH0810860Y2 - Interlocking mechanism between the magnetic head of the tape drive and the pinch roller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a head of a tape drive device capable of retracting a magnetic head after a pinch roller is completely separated from a capstan from a reproducing operation state. And a pinch roller interlocking mechanism.

(Prior Art) Generally, in a tape drive device, a head mounting plate having a magnetic head mounted thereon is moved from a stop position to a reproducing operation position by a reproducing operation, and a pinch roller is capstaned by a moving force of the head mounting plate at this time. The moving force of the head mounting plate is transmitted to the pinch roller arm via the spring member in order to bring the head into contact with and to obtain the reproduction operation state.

In the conventional magnetic head and pinch roller interlocking mechanism, the head mounting plate and the pinch roller arm are interlocked with each other via a spring member so that the head mounting plate can be moved forward or backward, and the pinch roller can be moved. The arm is configured to follow this. For example, when the reproduction operation state is changed to the cue or review operation state, the head mounting plate is slightly retracted from the reproduction operation position to reduce the contact pressure between the magnetic head and the tape. At the same time, the pinch roller is moved away from the capstan.

(Problems to be solved by the invention) However, when the head mounting plate and the pinch roller arm are simply interlocked with each other via the spring member, when the playback operation state is changed to the cue or review operation state, the pinch roller arm is pinched. Since the contact pressure between the magnetic head and the tape is reduced before the roller has separated from the capstan, the tape moves in the width direction at this time, and in extreme cases, the tape comes off the capstan. There was a risk that problems such as being lost may occur.

The same problem occurs when the playback operation state is changed to the pause state.Therefore, a special mechanism for separating the pinch roller from the capstan must be provided while keeping the head mounting plate at the playback operation position. However, there was a new problem that the configuration became complicated.

Therefore, an object of the present invention is to move the pinch roller to the capstan before the magnetic head starts to move in the return direction when the reproduction operation state is changed to the cue, review operation state or pause state without complicating the configuration. It is an object of the present invention to provide an interlocking mechanism of a magnetic head of a tape drive device and a pinch roller that can completely prevent the tape from moving in the width direction and can be reliably prevented from coming off the capstan.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured to move a reproducing operation interlocking member, which is connected to a head mounting plate having a magnetic head mounted thereon, via a first spring member by a reproducing operation. The head mounting plate is moved from the stop position to the reproducing operation position, and the moving force of the head mounting plate at this time is transmitted to the pinch roller arm via the second spring member to move the pinch roller to the capstan. Interlocking the magnetic head and the pinch roller of the tape drive device in which the head mounting plate and the pinch roller are held at their respective moving positions by pressing them and locking the playback operation interlocking member at the moving position by the locking mechanism. In the mechanism, the head mounting plate and a slide plate that is provided so as to be movable back and forth in the same direction as the head mounting plate,
The slide plate is provided with a pinch roller arm engaging portion and a head mounting plate engaging portion while being connected via a third spring member. When retracting against the urging force of the third spring member, the slide plate moves the pinch roller arm in the return direction to separate the pinch roller from the capstan, and then the slide plate. Then, the head mounting plate is moved in the returning direction against the biasing force of the first spring member.

(Operation) The reproduction operation interlocking member that moves by the reproduction operation is connected to the head mounting plate via the first spring member, and the head mounting plate and the slide plate are connected to each other via the second spring member.
Further, when the head mounting plate moves from the stop position toward the reproducing operation position, the pinch roller arm receives the moving force of the head mounting plate via the third spring member and comes into pressure contact with the capstan. Further, the slide plate is engaged with the head mounting plate so as to be movable within a certain range, and acts to push the pinch roller arm back in the returning direction when moving in the returning direction.

Therefore, when shifting from the reproduction operation state to the cue, review operation state or pause state, the slide plate is moved in the return direction. Accordingly, the pinch roller can be completely separated from the capstan before the magnetic head starts moving in the return direction.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the assembled state of the interlocking mechanism of the magnetic head and pinch roller of the tape drive device of the present invention, FIG. 2 is a plan view of the same disassembled state, and FIG. 3 is a line III-III of FIG. 1 is a substrate along which a head mounting plate 2 is provided on the upper surface thereof so as to be movable back and forth in the directions of arrows A and B between a stop position and a reproducing operation position. Has been. A long hole 3 is formed at the tip of the head mounting plate 2.
Is slidably fitted to a guide shaft 4 projecting from the upper surface of the substrate 1, and the head mounting plate 2 has an arrow mark within the range of the elongated hole 3.
Move in the A and B directions. A magnetic head 5 is attached to the central upper surface of the rear end portion of the head attachment plate 2. A reproduction operation member 6 and a reproduction operation interlocking member 7 interlocked with the reproduction operation member 6 are located on one side of the head mounting plate 2 and are on the lower surface of the substrate 1.
It is provided so that it can move back and forth in the same direction (direction of arrows A and B). The regeneration operation interlocking member 7 is urged in the backward direction (arrow B direction) by the return spring 8 together with the regeneration operation member 6.
The return spring 8 is formed of a coil spring, one end of which is hooked to the first spring hook 9a of the reproduction operation interlocking member 7 and the other end of which is hooked to the first spring hook (not shown) of the substrate 1. . The reproduction operation interlocking member 7 is connected to the head mounting plate 2 via a first spring member 10. First spring member 10
Is a coil spring, one end of which is a reproduction operation interlocking member 7
The second spring hooking piece 9b and the other end thereof are hooked to the engaging wall 11 which also serves as a spring hooking portion and projects vertically downward at the center of the rear end of the head mounting plate 2. Then, by moving the reproduction operation interlocking member 7 forward in the direction of arrow A through the reproduction operation member 6 against the urging force of the return spring 8, the head mounting plate 2 moves from the stop position to the reproduction operation position. A contact protrusion 7a is provided at the rear end of the reproduction operation interlocking member 7, and the contact protrusion 7a is an engagement wall of the head mounting plate 2.
11 is in abutting engagement with the front surface. The reproduction operation interlocking member 7 is locked at the moving position by a locking mechanism (not shown). The moving force of the head mounting plate 2 is transmitted to the pinch roller arm 13 via the second spring member 12. The second spring member 12 is formed of a torsion spring and is provided on both upper surfaces of the head mounting plate 2. The second spring member 12 has a coil portion 12a at the center thereof on the second spring hook portion 14 of the head mounting plate 2 and one end 12b.
Are respectively hooked on the third spring hooks 15 of the head mounting plate 2, and the other ends 12c thereof are brought into contact with the spring contact portions 13a of the pinch roller arm 13. The pinch roller arms 13 are located on both sides of the head mounting plate 2 and are rotatably supported on the upper surface of the substrate 1. A pinch roller 16 is rotatably supported by the pinch roller arm 13, and the pinch roller 16 comes into contact with and separates from a corresponding capstan 17 as the pinch roller arm 13 rotates. The capstans 17 are located on both sides of the head mounting plate 2 and are rotatably projected on the upper surface of the substrate 1. Then, the head attachment plate 2 and the pinch roller 16 are held at the moving position by locking the reproduction operation interlocking member 7 at the moving position by the locking mechanism. A slide plate 18 is provided below the head mounting plate 2 and on the upper surface of the substrate 1 so as to be movable back and forth in the same direction as the head mounting plate 2. This slide plate 18
It is connected to the head mounting plate 2 via a third spring member 19 in a direction in which they are attracted to each other. The third spring member 19 is composed of a coil spring weaker than the first spring member 10, one end of which is the fourth spring hook portion 20 of the head mounting plate 2 and the other end of which is a spring hook portion 21 of the slide plate 18. It has been hung. A long hole 22 is formed in the slide plate 18, and the long hole 22 is slidably fitted to the guide shaft 4 like the long hole 3 of the head mounting plate 2. Engagement holes 18b as pinch roller arm engagement portions are formed on both sides of the rear end of the slide plate 18,
The engagement piece 1 of the pinch roller arm 13 is inserted into these engagement holes 18b.
3b is in abutting engagement. An engaging projection 24 as an upward head mounting plate engaging portion is provided at a substantially central portion of the slide plate 18, and the engaging projection 24 is provided in the second elongated hole 25 of the head mounting plate 2.
Movably engaged therein. An abutting protrusion 18a is provided at the center of the rear end portion of the slide plate 18, and the abutting protrusion 18a abuts and engages with the rear face of the engaging wall 11 of the head mounting plate 2. A downward engaging wall 26 is provided at a substantially central portion of the slide plate 18,
One end 27a of the return lever 27 contacts the engagement wall 26.

The center portion of the return lever 27 is rotatably supported on the lower surface of the substrate 1. The other end 27b of the return lever 27 engages with the engagement protrusion 29 at the tip of the fast-forwarding operation member 28. The fast-forwarding operation member 28 is located on the other side of the head mounting plate 2 and is located on the lower surface of the substrate 1 in the same direction as the head mounting plate 2 (arrow A,
It is installed so that it can move back and forth in the B direction). Fast forward operation member 2
8 is biased in the backward direction (arrow B direction) by a return spring 30. The return spring 30 is composed of a coil spring, one end of which is hooked on the spring hook 31 of the fast-forwarding operation member 28 and the other end of which is hooked on a spring hook (not shown) of the substrate 1. Then, when the head mounting plate 2 is in the reproducing operation position, the fast-forwarding operation member 28 is moved forward against the urging force of the return spring 30, so that the engaging projection 29 thereof is returned.
The return lever 27 rotates counterclockwise in FIG. 2, and the one end 27a of the return lever 27 abuts and engages with the engagement wall 26 of the slide plate 18. As a result, the slide plate 18 is pushed back in the backward direction against the biasing force of the third spring member 19. A stopper 32 for determining the position of the magnetic head 5 at the reproducing operation position of the head mounting plate 2 is provided on the upper surface of the substrate 1 so as to project vertically upward. The tip 18c of the reproduction operation interlocking member 18 contacts the stopper 32.

Next, the operation of the interlocking mechanism of the magnetic head and the pinch roller of the tape drive device having the above-mentioned configuration will be described.

1 to 3 show a stopped state. In this state, the head mounting plate 2 is retracted together with the slide plate 18 in the direction of arrow B, the magnetic head 5 is at the stop position, and both pinch rollers 16 correspond to the capstan.
Separated from 17. From such a stopped state, when a tape cassette (not shown) is loaded at a predetermined position and the reproduction operation interlocking member 7 is advanced in the arrow A direction against the urging force of the return spring 8 via the reproduction operation member 6, With this, the first
The head mounting plate 2 and the slide plate 18 are moved integrally with each other via the spring member 10 in the direction of arrow A. As the head mounting plate 2 advances, the second spring members 12 on both sides of the head mounting plate 2 move forward.
However, by pressing the spring contact portion 13a of the pinch roller arm 13, the left pinch roller arm 13 in FIGS. 1 and 2 is rotated counterclockwise and the right pinch roller arm 13 is rotated. Is rotated clockwise. Then, when the reproduction operation interlocking member 7 is locked at the forward position, the reproduction operation interlocking member 18 is locked at the reproduction operation position while the tip end 18c of the reproduction operation interlocking member 18 is in contact with the stopper 32 of the substrate 1, and FIG. The pinch roller 16 on the left side in the middle is in pressure contact with the corresponding capstan 7, and the pinch roller 16 on the right side in FIG. 2 is slightly separated from the corresponding capstan 17 by a tape running direction reversing mechanism (not shown). The respective states are held, and the reproduction operation state shown in FIG. 4 is set. In this state, the tape guides 33 in the tape cassette are located on both sides of the magnetic head 5, and the magnetic head 5 is in contact with the tape 34 between the tape guides 33. From one direction to the left, the reproduction operation is performed.

In such a reproduction state, when the fast-forwarding operation member 28 is pushed in the direction of the arrow A against the biasing force of the return spring 30, the engagement protrusion 29 thereof comes into contact with and engages with the other end 27b of the return lever 27. As a result, the return lever 27 is rotated counterclockwise in FIG. As the return lever 27 rotates, its one end 27a abuts and engages with the engagement wall 26 of the slide plate 18, so that only this slide plate 18 resists the urging force of the third spring member 19. Retreat in the direction of arrow B. This slide plate 18
Of the pinch roller arms 13 whose engaging pieces 18b are engaged with the engaging holes 18b thereof, the left pinch roller arm 13 in FIG. 4 is the clockwise pinch roller arm 13 in the clockwise direction. The arms 13 are rotated counterclockwise against the biasing forces of the second spring members 12, so that the pinch rollers 16 are separated from the corresponding capstans 17. The head mounting plate 2 does not change at the reproducing operation position (state of FIG. 5). When the fast-forwarding operation member 28 is further advanced in the direction of arrow A from the state of FIG. 5, the slide plate 18 is retracted in the direction of arrow B via the return lever 27, and both pinch rollers 16 are also corresponding. Further, the head mounting plate 2 retreats in the direction of arrow B as the engaging projection 24 of the slide plate 18 abuts and engages with the rear end surface 25a of the long hole 25 of the head mounting plate 2 while being further separated from the capstan 17. Then, as shown in FIG. 6, the fast-forward operation state is set. In this state, the magnetic head 5 is in slight contact with the tape 34, and the tape 34 runs at a high speed from right to left in FIG. When the pushing force of the fast-forwarding operation member 28 is removed, the fast-forwarding operation member 28 is returned by the urging force of the return spring 30, and the head mounting plate 2, the slide plate 18, and the pinch rollers 16 are
By the operation opposite to the above, the reproduction operation state shown in FIG. 4 is restored again, and the reproduction operation is performed. Incidentally, the fast-forwarding operation member 28 may be locked at the pushing position, and when the desired tape position is detected, the locking may be released by the signal.

When the stop operation member (not shown) is operated, the locked state of the reproduction operation interlocking member 7 is released, and the reproduction operation interlocking member 7 is released.
As shown in the figure, the slide plate 18 returns to the stop position together with the head mounting plate 2.

(Effects of the Invention) As described above, in the tape drive device of the present invention, the interlocking mechanism of the magnetic head and the pinch roller includes the head mounting plate and the slide plate provided so as to be movable back and forth in the same direction as the head mounting plate. The slide plate is connected through a spring member, and the slide plate is provided with a pinch roller arm engagement portion and a head attachment plate engagement portion, and the slide plate is provided with the head attachment plate in the reproduction operation position. When the slide plate retreats against the urging force of the spring member, the slide plate moves the pinch roller arm in the return direction to separate the pinch roller from the capstan, and then the slide plate moves the pinch roller arm away from the capstan. Since the head mounting plate is moved in the returning direction against the urging force of the first spring member, the reproducing operation state is changed to the cue, the review operation state or the reproduction operation state without complicating the configuration. When moving to the paused state, it is possible to completely separate the pinch roller from the capstan before the magnetic head starts moving in the return direction, so that the tape can move in the width direction or come off from the capstan. It can be surely prevented.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view of an interlocking mechanism of a magnetic head and a pinch roller of a tape drive device of the present invention, FIG. 2 is an exploded plan view of the same mechanism, and FIG. Figure 1
Sectional views taken along the line III-III and FIGS. 4 to 6 are exploded plan views for explaining the operation of the mechanism. 2 ... Head mounting plate, 5 ... Magnetic head, 7 ... Reproduction operation interlocking member, 10 ... First spring member, 12 ... Second spring member, 13 ...
Pinch roller arm, 16 ... Pinch roller, 17 ... Capstan, 18 ... Slide plate, 18b ... Engagement hole (pinch roller arm engaging portion), 19 ... Third spring member, 24 ... Engagement protrusion (Head mounting plate) Engaging part).

Claims (1)

[Scope of utility model registration request] 1. A head for moving a reproducing operation interlocking member (7) connected to a head mounting plate (2) having a magnetic head (5) attached thereto via a first spring member (10) by a reproducing operation. The mounting plate is moved from the stop position to the reproduction operation position, and the moving force of the head mounting plate at this time
Is transmitted to the pinch roller arm (13) through the spring member (12) and the pinch roller (16) supported by the pinch roller arm is pressed against the capstan (17) to lock the reproduction operation interlocking member. In the interlocking mechanism of the magnetic head and the pinch roller of the tape drive device, in which the magnetic head and the pinch roller are retained at the respective moving positions by locking the magnetic head and the pinch roller by a mechanism, the head mounting plate can be moved back and forth in the same direction A slide plate (18) provided on the pinch roller is connected to the head mounting plate via a third spring member (19), and the slide plate has the pinch roller when moving from the reproduction operation position to the stop position direction. A pinch roller arm engaging portion (18b) that engages with the arm and separates the pinch roller from the capstan is provided, and then when further moving in the stop position direction. Serial head mounting plate engaged with the magnetic head and the pinch roller interlocking mechanism of the tape drive device, characterized in that a head mounting plate engaging portion (24) for moving the head mounting plate in the stop position.