KR900001494Y1 - Auto-reverse device for tape recorder - Google Patents

Abstract

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Description

Tape recorder automatic reversing device

1 to 4 is a schematic configuration of the present invention.

5 to 7 is a plan view showing a part of the present invention.

8 is a cross-sectional view taken along line X-ray of FIG.

* Explanation of symbols for main parts of the drawings

1a, 1b: Rail side 2: Magnetic head

3a, 3b: Capstan shaft 4a, 4b: Pinch roller

8a, 8b, 9a, 9b: gear (rotary transmission body) 11a, 11b: eccentric cam surface

12a, 12b: push protrusion 17: pinch roller switching member

25: tape direction switching operation member 29a, 29b: the push stop section

31a, 31b: Cam drill 33a, 33a: butting part

38: head mounting member 40: fast sending operation member

24: interlocking member 47: hook member

The present invention detects this when the rail stops, switches the left and right pinch rollers, and at the same time, switches from the replay operation to the fast send operation state, and from the fast send operation state to the replay operation state in the same direction. An automatic reversing apparatus of a tape recorder which is switched from an operating state to a reproducing operating state in a different direction.

[Prior art]

As an automatic reversing device of a tape recorder, a solenoid is operated by electrically detecting the end of a tape, thereby switching the left and right pinch rollers, or mechanically detecting the tension of the tape end and borrowing a rotation force such as a frying wheel to remove the pinch roller. It is known to switch operation.

[Problem solved by problem]

Electrically detecting the tape end is a configuration that must be provided with a solenoid, which is very disadvantageous for miniaturization due to complexity.

Using the rotational force of the frying wheel is generally a structure in which a pin is placed on a part of the frying wheel and the pinch roller is used to turn the change mechanism, which may hinder the balance of the frying wheel. It may become strong and may detect this and cause a malfunction.

In addition, the conventional tape recorder with the automatic reversing device switches from the reproducing operation state to the fast forwarding operation state, from the fast forwarding operation state to the same reproducing operation state, and from the fast forwarding operation to the reproducing operation state of the different direction. Switching was not possible.

[Purpose of designation]

The present invention has been made to solve such a problem, and its purpose is to minimize the need for an accessory such as a solenoid and to reduce the size of the flywheel. Provides an automatic reversing device for tape recorders that can be switched to the send operation state, the switch from the fast send operation state to the regeneration operation state in the same direction, and the switch from the fast send operation state to the regeneration operation state in the different direction. It's in the nose.

[Means to solve the problem]

The present invention includes a rotation transmission member and a cam drill in symmetrical symmetry, an eccentric cam surface and an extrusion protrusion are formed on the rotation transmission body, and an extrusion stop part is formed on the rail side to prevent rotation of the capstan shaft. It transmits to a rail side via a rotation transmission body and a friction mechanism.

In addition, while the rail side is rotating, the push-cart part supports the cam drill so that the abutment formed on a part of the cam drill slides against the cam surface. The elastic side stops and the elasticity of the push-cart part is lost. When the abutment portion stays at a position away from the cam surface, the push protrusion touches the abutment portion, and the rotational transmission body is released at the rotational transmission position from the capstan shaft to the rail side and responds to the motion of the rotational transmission body at this time. The switching member is actuated by a pinch roller.

In addition, the pinch roller switching member can be moved back and forth manually by the tape direction switching operation member, thereby switching the running direction of the tape.

In addition, a quick sending operation member is connected to the head mounting member on which the magnetic head is mounted, and by pressing the operating member, the head member and the pinch roller interlocked with it can be retracted to make a fast sending operation state. The fastening operation state is maintained by the hook member fastened to the pressed position.

On the other hand, the hook member is fastened by pressing the fast-operating operation member once, and the hook member is latched to the pressed position, and when pressed again, the hook member is released.

At this time, the tape recorder enters a reproducing operation state in the same direction.

In addition, an interlocking member interlocked with the tape direction switching operating member is formed, and when the tape direction switching operating member is pressed in the quick sending operation state, the hook member is released from the interlocking member.

At this time, the tape recorder enters a reproducing operation state in the other direction.

In this configuration, the pinch roller switching mechanism does not operate as long as the rail side rotates, and the moving mechanism operates when the rail side stops, thereby eliminating the need for accessory parts such as solenoids and miniaturization.

In addition, there is no fear of impairing the rotational balance of the frying wheel or malfunctioning during startup.

In addition, it is possible to switch manually from the play operation state to the fast-send operation state, switch from the fast-send operation state to the regeneration operation state in the same direction, and switch the regeneration operation state of the other direction from the fast-send operation state manually. It may be provided.

EXAMPLE

FIG. 1 shows a state in which the right rail side 1a is rotating, and FIG. 4 shows a state in which the left rail side 1b is rotating.

Firstly, FIGS. 2 and 3 show an intermediate process of changing from the state of FIG. 1 to the state of FIG.

First, referring to FIG. 1, capstan shafts 3a and 3b, pinch rollers 4a and 4b and the rail sides 1a and 1b are disposed symmetrically on both sides of the magnetic head 2, respectively. Rotating plates 7a and 7b which are mounted 5a, 5b and fry wheels 6a and 6b and which are rotated around the cap stand shafts 3a and 3b are formed.

At one end of each of the rotating plates 7a and 7b, a rotary transmission body consisting of large and small gears 8a, 8b: 9a, and 9b is supported through the shafts 10a and 10b, and circumferential cam faces 11a and 11b are formed around the shafts 10a and 10b. At the same time, the pushing projections 12a and 12b protrude continuously along the shafts 10a and 10b at the maximum radial portions in the eccentric cam surfaces 11a and 11b.

Moreover, the other end of each rotation board 7a, 7b becomes the bending piece 13a, 13b.

The pinch rollers 4a and 4b are supported by the supports 15a and 15b which can be rotated about the shafts 14a and 14b, and are made of blowing material with respect to the cap stand shaft 3a.

Moreover, bent pieces 16a and 16b are formed also in each support body 15a and 15b.

17 is a pinch roller switching member which slides in the left and right direction, and the switching member 17 is provided with protrusions 18a, 18b: 19a, 19b so as to sandwich the bent pieces 13a, 13b of the pivot plates 7a, 7b. Trimming portions 20a and 20b into which the bent pieces 16a and 16b of the respective supports 15a and 15b are inserted are formed.

Incidentally, inclined edges 21a and 21b are formed in a part of each of the trimming portions 20a and 20b. When the switching member 17 moves to the right side, the left inclined corner 21b is slid to the bent piece 16b of the left support 15b as shown in FIG. When the switch member 17 is moved to the left side, as shown in FIG. 4, the right inclined edge 21a is slid to the bent piece 16a of the right support 15a so that the right pinch roller 4a is separated from the cap stand shaft 3a.

However, each support body 15a, 15b is a spring which is not shown in figure, and it pinches in the direction which presses 4a, 4b to the capstan shaft 3a, 3b by the pinch roller.

In addition, one end of the switching member 17 is connected to a driving plate 24 which can be pivotally rotated within the range regulated by the stopper pin 23 by the deployment spring 22.

Example: When the switching member 17 moves to the left and the turning plate 24 rotates to a position beyond the neutral point, this time, by the reverse force of the switching plate 24, the switching member 17 is moved to the left side and accordingly The pinch rollers 4a are separated from the capstan shaft 3a.

The driving plate 24 is provided with an outer cylinder (not shown) of the tape recorder for indicating the position of the tape direction switching operating member 25 such as "F" and "R", that is, the direction of travel of the magnetic tape.

Large-diameter gears 8a, 8b and 8b of the large and small gears 8a, 8b: 9a, and 9b constituting the rotational transmission body are fitted with capstan shafts 3a and 3b and integral small gears 5a and 5b. Is configured to selectively engage the counterparts 26a and 26b coaxially formed with the rail sides 1a and 1b.

The teeth 9a and 26a or the teeth 9b and 26b are controlled by the rotation of the pivoting plates 7a and 7b. All the pivoting plates 7a and 7b also have the gears 9a and 9b in the direction in which the gears 26a and 26b are engaged. It is supported by the pull springs 27a and 27b.

However, the rotation of the pivoting plates 7a and 7b is controlled by the left and right movement of the switching member 17. When one tooth (e.g., the right tooth 9a) is engaged with the tooth 26a, the other tooth 9b falls away from the tooth 26b. Built.

Rotating members 28a and 28b which are integrally rotated thereto are mounted on the shaft common to the rails 1a and 1b, and pin-shaped push-in stops 29a and 29b are fixed to the rotating members 28a and 28b.

Further, a friction mechanism (not shown) is provided between the rails 1a and 1b and the rotation members 28a and 28b and the counterparts 26a and 26b. For example, the counterpart 26a is stopped even when the rail side 1a stops rotating. It can be rotated, in which case the friction mechanism will also generate a slip.

In the figure, 30 is a stationary plate, on which the cam drills 31a and 31b and the pressing auxiliary members 32a and 32b are supported by a rotating material.

The cam drills 31a and 31b have abutting portions 33a and 33b in a portion farther from the support point position, and at the same time, the cam drills 31a and 31b are elastic in the vicinity of the support point positions and the hydraulic parts 34a and 34b located on the rotation trajectories of the push stops 29a and 29b. Part 35a, 35b, etc. are provided.

In addition, the pressing auxiliary member 32a generally has an L shape, and positions 36a and 36b at the first position outside the shafts 10a and 10b, and the other side 37a and 34b are opposed to the elastic pieces 35a and 35b of the cam drills 31a and 31b. have.

In the figure, 38 is a head attaching member to which the magnetic head 2 is mounted, which is formed of a forward and backward material.

The cam pin 39 protrudes from the front end of the head attaching member 38, and the cam pin 39 is fitted with the cam hole 41 of the quick-forward operating member 40 formed of the left and right retraction material.

The fast-acting operating member 40 has an engaging protrusion 42 in the vicinity of the cam hole 41, and is always held in the right direction in the drawing by the pulling spring 43. The force of this spring causes the head mounting plate 38 to hold the magnetic head 2. It is touching in the direction of the operation position to be brought into contact with the tape.

On the other hand, an engagement pin 44 protrudes from the center portion of the pinch roller switching member 17, and one end of the interlocking member 45 is engaged with the pin 44 as shown in FIGS.

The interlocking member 45 is supported by a rotating material on a substrate (not shown) of the tape recorder, and has a bulging protrusion 46 at the other end thereof.

In Figs. 5 to 7, 47 is a hook member, and the hook member 47 is engaged with the engaging protrusion 42 to be quickly sent. The fastening member 48 to be fastened to the moving position is pressed. A stopper portion 49 opposed to the portion 48 and a slanted piece 50 adjacent to the engaging portion 48, an escape claw 51 opposed to the inclined piece 50, and a sliding protrusion 52 located on the operation line of the bulging protrusion 46 of the interlocking member 45. And a protrusion 54 or the like which contacts the stopper pin 53 formed on the fixed portion and regulates its rotation range, and is always rotated in the counterclockwise direction by the spring 55.

Referring to the following, FIG. 1 shows that the right pinch roller 4a is pressed against the capstan shaft 3a, and the rotation of the capstan shaft 3a in the direction of the arrow causes the gears 5a, 8a, 9a, 26a and a friction mechanism not shown. The tape direction switching operating member 25 is in the " F " position by displaying the state transmitted to the right rail side 1a through the valve.

At this time, the rotational force of the rail side 1a is transmitted to the cam drill 31a through the push stop part 29a, and the contact part 33a of the cam drill 31a is in sliding contact with the cam surface 11a.

Thus, as long as the contact part 33a is in sliding contact with the cam surface 11a, there is no case where the contact part 33a and the pushing protrusion 12a touch.

If playback or recording is performed while the tape is wound on the right side 1a at this time, at this time, since the left side 1b is the release side, the push stop part 29b does not push the hydraulic part 34b of the cam drill 31b.

However, in this state, the left rotational transmission bodies (gear 8b, 9b) move away from the counterbalance 26 and are not engaged with the rail side 1b, and push one side 36b of the pressing auxiliary member 32b on the axis 10b.

Thus, the other side 37b of the pressing auxiliary member 32b pushes the elastic piece 35b of the cam drill 31b, and the pressing auxiliary member 32b is in sliding contact with the cam face 11b against the cam 33a in place of the pushing stop 29b. To be maintained.

Next, when the tape is all wound on the right rail, slippage occurs in the friction mechanism provided between the counterbalance 26a and the rail side 1a, and the rail side 1a stops.

There, the contact portion 33a sliding in contact with the cam surface 11a is separated from the cam surface 11a at a position closer to the shaft 10a, and the push protrusion 12a contacts the contact portion 33a as shown in FIG.

In this case, since the support point of the cam drill 31a does not move, it rotates against a rotation transmission body, ie, the rotating plate 7a side spring 27a, and the gear 9a is dropped from the counterbalance 26a.

As a result, the rotational force transmission path is disconnected from the cap stand shaft 3a to the rail side 1a.

On the other hand, by the rotation of the rotating plate 7a, the bending piece 13a of the rotating plate 7a pushes the projection 19a of the switching member 17 from the right side as shown in FIG. 3, and moves the switching plate 17 to the left direction.

Therefore, the driving plate 24 rotates clockwise while accumulating the expansion spring 22, and when the spring 22 exceeds the neutral point, the elasticity of the spring 22 acts in the direction to rotate the driving plate 24, so that the switching member 17 rapidly moves to the left. By moving, the tape direction switching operating member 25 moves to the "R" side.

At this time, the left inclined corner 21b of the pinch roller switching member 17 is released as opposed to the support 15b as shown in FIG. 4, and on the contrary, the right inclined corner 21a rotates the support 15a in the anti-thrust direction, so that the left pinch roller 4b Is pressed against the capstan shaft 3b and the right pinch roller 4a falls off the capstan shaft 3a.

Moreover, the left rotating plate 7b is dragged by the spring 27b to rotate in the clockwise direction, thereby engaging the small difference 9b of the rotational transmission body with the counterpart 26b.

Therefore, as shown in FIG. 4, the shape is opposite to that of FIG. 1, and the left rail side 1b is rotated in the winding direction so that the tape is wound around the left rail, so that playback or recording is performed.

When the tape is to be sent quickly next time, the fastening operation member 40 is pushed as shown in FIG. 6, and the engaging projection 42 is fastened to the engaging portion 48 of the hook member 47, and then released.

At this time, the cam pin 39 formed in the head attaching member 38 moves along the cam hole 41 of the quick-operating operating member 40, and the head attaching member 38 retreats to detach the magnetic head 2 from the magnetic tape.

At the same time, both of the supports 15a and 15b are interlocked with the retracting operation of the head mounting member 38, and the pinch rollers 4a and 4b are all separated from the cap stand shafts 3a and 3b, thereby moving the tape at a high speed in the same direction and quickly moving.

There are two ways to return to the play or record operation state from this quick send operation state.

That is, when it is going to be in a reproducing or recording operation state without changing the running direction of the tape, the sending operation member 40 is pressed once again.

In this way, the fastening protrusion 42 of the operating member 40 is fastened to the inner surface of the inclined piece 50 from the pinned portion 48 and positioned in front of the inclined piece 50. Through the lower surface, the hook member 47 can be removed from the hook member 47 and returned to the position of FIG. 5, as well as changed from the quick send operation state to the play or record operation state again.

Next, in order to change the running direction of the tape to a playback or recording operation state, the tape direction switching operating member 25 may be switched from right to left and left to right.

In this way, the interlocking member 45 rotates according to the sliding action of the switching member 17 of the pinch roller, and the bulging protrusion 46 of the interlocking member 45 is slid to the sliding alignment protrusion 52 to float the hook member 47 as shown in FIG.

Here, the fastening operation 42 of the fastening operating member 40 is released from the fastening recess 48 of the hook member 47, and the fasting fastening operating member 40 returns to the position of FIG. 5, in this case, the pinch roller moves to the operation of the switching member 17. As a result, the running direction of the tape is switched to enter the playback or recording operation state.

In addition, when the automatic reversing apparatus is applied to a cassette type tape recorder, the quick-sending operation member 40 may be provided with a cassette and eject function.

In other words, the ejecting operation member 40 may be pushed back in the position of FIG. 6 again to operate the ejection mechanism by pressing the spare.

In addition, the present invention is not limited to the embodiment, for example, in the above embodiment, the gears 8a, 8b, 9a, and 9b as rotational transmission bodies are rotated plates 7a and 7b which are rotated around the cap stand shafts 3a and 3b. The pinch roller may extend a portion of the switching member and support the rotational transmission member by the extension portion.

The switching member 17 may be moved through a separate member without directly moving the switching member 17 to the member supporting the rotational transmission member.

The tape direction switching operating member is not limited to the left and right pivot type shown in the embodiment, but may be a pair of members connected separately to both ends of the left and right slide type or the switching member 24.

[Effect of design]

As described above, the present invention eliminates the need for an accessory such as a solenoid, and thus can be miniaturized. Also, without stopping the flywheel's balance, the stop of the rail is detected to operate the switching mechanism by a pinch roller. Even if the tape tension first increases during startup, no malfunction occurs.

In addition, it is possible to switch from the regeneration operation state to the fast-send operation state, to the resend operation state from the fast-send operation state, and to the regeneration operation state of the other direction from the fast-send operation state. You can get the effect.

Claims (1)

The cap stand shaft 3, the pinch roller 4, and the rail side 1 are arranged symmetrically on the left and right sides of the magnetic head 2, and the cap stand shaft 3 on both sides and one of the rail sides are always on. At the same time as the rotational drive, the pinch roller 4 of the same axis as the rail side 1 of the rotating shaft was pressed against the capstan shaft 3 corresponding thereto, and the magnetic tape was moved in one direction to wind the magnetic tape to the end. In the automatic reversing apparatus of a tape recorder which automatically switches the running direction of a magnetic tape when being pushed, the push stop part 29 formed in the eccentric position of each said rail side 1, and each said cap stand shaft 3 It rotates in response to the rotational force of the eccentric cam face 11 and the symmetrical rotational transmission body which transmits rotational force through the friction mechanism to the rail side 1 corresponding to each other, and the rotation axis of this rotational transmission body, and pushes With a zoom protrusion 12 and abutting portion 33 While the rail side 1 is being rotated, it is supported by the push-out fingering part 29 to push the contact part 33 by sliding each contact part 33 to the cam surface 11. If the contacting part 33 stays away from the cam surface 11 due to the loss of the holding force of the pushing fingering part 29 and the rail side 1 stops, the contacting part The cam drill 31 and the rotation carrier having a right and left symmetry to contact the push protrusion 12 with each other to release the rotation carrier from the capstan shaft 3 to the rotation side from the rail side 1 are rotated. When it is released from the transfer position, the pinch roller switching member 17 and the magnetic head 2 are supported by removing the left and right pinch rollers 4 with respect to the cap stand shaft 3 in response to the movement. Operational position to contact the magnetic head 2 to the magnetic tape and the stop away from the magnetic tape It is possible to move back and forth in the range of the tooth, and when moving from the operating position to the stop position, the head mounting member 38 falling from both the pinch rollers 4 and the cap stand shaft 3, and the pinch roller switching member 17 ) Is connected to the tape direction switching operation member 25 which switches the traveling direction of the magnetic tape by manually moving back and forth, and the head mounting member 38 so that the head mounting member is always in the operation position direction from the stop position by elasticity. The quick-sending operation member 40 and the quick-sending member 40 which make a tape recorder quick-operation state by retracting the head attaching member 38 to a stop position direction by pressing manually and operating manually, and this quick-sending member 40 are manually operated. Hook member to keep the tape recorder in the operating state quickly by pressing it to the stuck position when it is pressed, and releasing it by pressing it again (4 7) and an interlocking member (45) for releasing the hook member (47) in conjunction with the operation of the tape direction switching operating member (25).