JPH01320663A - Threading device for tape recorder - Google Patents

Abstract

PURPOSE:To hold the position of a threading mechanism under a constant state during its separation time by preventing the rotation of a rotary member for operating the threading mechanism with a detaining part of an oscillating detainer body in connection with the rotary member. CONSTITUTION:When a motor is commenced to rotate in the reverse direction based on an eject command from the outside, a threader gear 25 and the oscillating detainer body are reversely rotated, and after a pin 14a of a rack is withdrawn from a groove part 25a of the threader gear 25, the oscillating detainer body is pulled by a spring 27 to oscillate, and a pin 26e is fitted into a recessed part 30 of a chassis F so that the oscillating detainer body and the threader gear 25 are prevented from rotating, and simultaneously a pin 26c is pressed against a detaining piece 31 of the chassis F to regulate the oscillating detainer body in its stopping position. Then, when a tape cassette is set in a threading position, a projecting piece of the oscillating detainer body is pushed by the pin 14a of the rack, so that the pin 26e is withdrawn from the recessed part 30 as the result of oscillation of the oscillating detainer body around its hole 26b, thus making the oscillating detainer body rotatable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention performs the above-mentioned threading operation on a tape cassette set at the threading position of a tape recorder where the tape from the tape cassette is pulled out and wound around the cylinder head. This invention relates to an improvement in a threading device for a tape recorder.

[Conventional technology]

Conventional tape recorders for video, 8mm video, digital audio, etc. have a loading mechanism that transports the tape cassette from the tape recorder's insertion slot to the threading position, and a threading mechanism that pulls out the tape from the tape cassette and wraps it around the cylinder head. They are usually driven by separate motors.

[Problem to be solved by the invention]

Therefore, conventionally, two motors were required, and these two motors were required.
Not only is a sensor required for timing the start and end of driving each monitor, but the control circuit thereof also becomes complex and expensive.

Moreover, due to its complexity, it has disadvantages such as frequent failures.

[Object of the Invention] In order to solve the problems of conventional tape recorders as described above, the present invention drives the loading mechanism and the threading mechanism with one motor, and improves reliability by simplifying the mechanism and eliminating the need for a control circuit. Improve performance and reduce costs.

If the threading mechanism is driven by one motor, the motor and threading mechanism will be separated from each other while the loading mechanism is in operation.

Therefore, during this disconnection period, due to vibration or otherwise,
If the threading mechanism moves, it may become impossible to set the tape cassette to the threading position, or
This may cause damage to the tape.

Furthermore, when the threading mechanism and the motor are next connected, there is a risk that their relative positions will be out of order, making them unable to connect or malfunctioning.

In order to prevent such a situation from occurring, the present invention also aims to maintain the threading mechanism in a constant state even if it is disconnected from the motor, and to prevent the threading mechanism from moving due to external force. It is something to do.

[Summary of the Invention] The present invention relates to a threading device for a tape recorder to achieve the above-mentioned object. The locking portion of the dynamic locking body prevents rotation by engaging with the recess of the fixed member, and the linear motion member is inserted into the disengagement portion of the swing locking body before the rotation member of the linear motion member is engaged. This is to release the rotation prevention by bringing them into contact with each other.

[Embodiment] Next, the second embodiment will be described with respect to a digital audio tape recorder shown in the drawings.

In FIGS. 4 to 7, 1 is a front panel, in which an insertion slot 2 for inserting a tape cassette A is opened, and a door 4 is connected to a hinge 3 on the lower side of the back surface of this insertion slot 2.
is hinged, and a spring 5 is installed on this cover plate 4,
The door 4 is biased to close the insertion port 2.

A chassis B is fixed to the back side of the front panel 1, and this chassis B has three parallel inverted characters, and at the horizontal part thereof, at a place approaching the front panel 1, there is a stepped portion 6a+ +6b+ 56C3. A guide groove 5 a T 6 b t 6 c is formed which descends at a lower angle.

The pins 8a, 8b, 8C of the cassette box 7 shown in FIG. are guide grooves 6a, 6
Move according to the shapes of b and 6c.

Therefore, the cassette box 7 has the guide groove 6a.

When moving the horizontal parts of 6b and 6c toward the front panel 1, they are once lowered by the stepped parts 6a+, sb, and 6c+, and when they move to the frontmost end, the insertion slot 2
It is located at the back.

On the outside of the chassis B, an arm 9 having a cam surface 9a in contact with the pin 8b and a key portion 9b that presses the pin 4a of the door 4 is pivotally supported by the pin 9c, and a spring 10 is installed to push the cam surface 9a downward. has been done.

In FIGS. 2 and 12 to 14, reference numeral 11 is a loading and threading motor, and its rotation is transmitted to a gear 12 via a belt and gear mechanism.

This gear 12 moves the pin 1 inside the guide groove 13 of the chassis B.
4a slides and meshes with a rack 14 that moves linearly.

The rack 14 is provided with a retaining groove 14b, push walls 14c and 14d on both sides thereof, and rotation preventing surfaces 14e and 14f continuous to the engaging groove 14b.

1, 15 to 17, reference numeral 15 denotes a gear rotatably supported by the chassis B. The gear 15 is engaged with the engagement groove 14b of the rack 14 and rotated. The rotation prevention surface 14e causes the gear 15 to move in the direction of arrow C in FIG.
The rotation prevention surface 14f prevents rotation in the direction of
Long pin 1 that prevents rotation in the opposite direction to C by
5a is erected.

The gear 15 also has a short pin 15b that is pushed by a pushing wall 14d formed on one side of the engagement groove 14b and rotates the gear 15 in the direction of arrow C, and a short pin 15b formed on the other side of the engagement groove 14b. Pushed by the pushing wall 14c, the gear 15 is rotated in the opposite direction to the arrow C, and a short pin 15c is erected.

As shown in FIG. 1, the gear 15 meshes with a gear 16 via a gear mechanism that is provided with a known buffering mechanism for rotation in one direction.

As shown in FIG. 5, the rotation of the gear 16 causes the pin 8b of the cassette box 7 to be inserted into the long hole 17a of the interlocking arm 17, and the rotation of the gear 16 causes the cassette box 7 to move into the guide groove 5a.

6b and 6c.

4 and 7, 18 indicates that the cassette box 7 is guided by the vertical portions of the guide grooves 6a, 6b, and 6c, and near the end of its descent, one end is closed by the tape cassette A inserted into the cassette box 7. It is a rotating arm that is pressed down.

This rotating arm 18 is pivotally supported by a shaft 18a on the frame D, and when one end thereof is pressed down and rotated by the tape cassette A as described above, the blocking portion 18b at the other end is rotated to the rear of the insertion opening 2. It is designed to rise as shown in Figure 4.

In FIGS. 3, 10, and 11, reference numeral 19 denotes a sliding piece whose guide groove 19a is guided by the chassis B, and a bent piece that is pushed when the rack 14 moves to the top end in FIG. 1O. 19b and the gripping portion 19c are connected to this slide piece 1.
It is set at 9.

A pin 20b of the rotating arm 20, which has a hole 20a pivotally supported in the frame H, is attached to the clamping portion 19c of the slide piece 19.
is inserted, and when the slide piece 19 is pushed and slid by the rack 14, the rotating arm 20 also rotates.

A hole 21a of the first push-out arm 21 is supported coaxially with the hole 20a of the pivot arm 20, and a spring 22 is mounted between the pivot arm 20 and the first push-out arm 21.

The side 20c of the rotating arm 20 is the first push-out arm 2.
The rotating arm 20 and the first push-out arm 21 are pressed against the first bending portion 21b by the biasing force of the spring 22, thereby maintaining the relative position of the rotating arm 20 and the first push-out arm 21.

Therefore, when the rotating arm 20 rotates in the direction of the arrow in FIG. 3, the first push-out arm 21 also rotates together with the spring 22, but the rotation of the first push-out arm 21 is prevented. In this case, even when the rotating arm 20 rotates, the spring 22 is extended, the side 20c is separated from the bent portion 21b, and the interlocking movement is released.

Reference numeral 23 designates a second push-out arm having a hole 23a pivotally supported in the frame E, and a first push-out arm 21 in the F-shaped groove 23b.
When the pin 21c is inserted and the first extrusion arm 21 rotates, the second extrusion arm 23 also rotates in conjunction.

21d and 23C are the first push-out arms 21. The extrusion rollers 21 d and 23 c are attached to the tip of the second extrusion arm 23 and move toward the cassette box 7 when the rotating arm 20 is rotated by the rack 14 .

Reference numeral 24 denotes a spring for returning the second extrusion arm 23. When the second extrusion arm 23 is returned by the spring 24, the first extrusion arm 21 and the rotating arm 2o are also returned in conjunction with this.

3 and 18 to 20, 25 is a threader gear rotatably supported by a stepped washer 28 attached to the chassis F with a screw 29, and has a groove into which the pin 14a of the rack 14 is inserted. 25a and a fan-shaped gear portion 25b are formed.

Reference numeral 26 denotes a swinging locking body in which a swinging hole 26a is fitted coaxially with the threader gear 25. A pin 25c of the threader gear 25 is inserted into the hole 26b, and the swinging locking body 26 is fitted with a swinging hole 26a coaxially with the threader gear 25. It is possible to swing within the movable range of the swing hole 26 around the center.

A spring 27 is mounted between the threader gear 25 and the swing locking body 26, and its urging force biases the swing hole 26a to one side with respect to the stepped washer 28.

A pin 26e is provided upright on the rocking locking body 26, and when the rocking locking body 26 is biased as described above, this pin 26e fits into the recess 30 of the chassis B and locks the rocker. Dynamic locking body 2
6 is prevented from rotating, the threader gear 25
Rotation is also prevented by pin 25c.

The swing locking body 26 has a protrusion 26 that protrudes into the guide groove 13.
d is formed, and when this projecting piece 26d is pushed by the pin 14a, the swing locking body 26 resists the bias of the spring 27 and the swing hole 26a swings in the opposite direction to the stepped washer 28. do.

Then, the pin 26e is pulled out from the recess 30, and the swing locking body 26 becomes rotatable, so that the threader gear 25 also becomes rotatable.

Further, a pin 26c is provided upright on the swinging locking body 26,
When the swing locking body 26 is pulled by the spring 27 and the pin 26e is fitted into the recess 30, it hits the locking piece 31 of the chassis F and restricts the rotational position of the swing locking body 26. ing.

In FIG. 2, 32.33 is a slide block that slides in guide grooves 34.35 bored in the chassis G, and a shaft 32 a t 33 a to be inserted into the guide groove 34 35 is located on the lower surface of this slide block. The tape is pulled out from the tape cassette A on the upper surface of the cylinder head 36.
Guide rollers 37 and 38 for winding the tape around the cylinder head 36 and guide bins 39 and 40 for stretching the tape obliquely to the cylinder head 36 are provided.

Note that the length of the guide grooves 34 and 35 is the same as that of the guide plotter 3.
2. In the position (initial position) before 33 pulls out the tape from the tape cassette A, the shaft 33a of the guide block 33 is in contact with the end of the guide groove 35, and the shaft 32a of the guide block 32 is in contact with the end of the guide groove 34. It is formed to a length that does not come into contact with the This is to ensure that the slide block 33 contacts the guide groove 35 and to prevent the slide block 32 from contacting the guide groove 34 due to dimensional errors or the like.

Reference numeral 41 denotes an arm to which a pinch roller 43 is attached, which is driven by sandwiching the tape between it and the capstan 42.

The gear portion 25b of the threader gear 25 includes a series of gears 4.
8 are sequentially meshed with each other, and an arm 44 is fixed to a gear 48a therein, and this arm 44 and the slide block 32 are connected by a connecting rod 44a.

An arm 45 is also fixed to a gear 48b in a series of gears 48, and this arm 45 and slide block 33 are connected by a connecting rod 45a.

Therefore, when the threader gear 25 rotates in the direction of the arrow, the series of gears 48 also rotates, and the arms 44 and 45 are also rotated, so that the arms 44 and 45 are connected to the connecting rods 44a and 45a.
Push the slide blocks 32 and 33 into the guide grooves 34.
35, the tape is pulled out from the tape cassette A, and wound around the cylinder head 36.

A pin 48a1 is erected on the gear 48a, and a spring 54 is installed between the pin 48a and the chassis G so that the slide block 32 passes through the dead center while sliding. .

In FIGS. 21 and 22, 49 is a spring plate, and its pressing portion 49a is the pin 8a, 8b, 8c of the cassette box 7.
When it reaches the corners of the guide grooves 6a, 6b, and 6c, it pushes down the rear end side of the cassette box 7.

Next, the operation of this digital audio tape recorder will be explained.

As shown in FIG. 5, guide vias 8a, 8b, 8c of cassette box 7 are guide grooves 6a, 6b.

I'll be waiting at a location near door 4 on 6c.

At this time, the tape cassette A is pushed into the cassette box 7 from the insertion slot 2 of the front panel 1 by folding down the door 4.

Then, the pressure causes the buffer mechanism between gear 15 and gear 16 to operate, causing gear 16 to rotate slightly, but gear 15 does not rotate.

When the gear 16 rotates slightly in this manner, the switch 50 shown in FIG. 2 is turned on by the gear 16.

When the switch 50 is turned on, the motor 11 rotates, the gear 12 is driven, and the rack 14 slides downward in FIG.

The relative positions of the rack 14 and gear 15 at the start of this movement are:
This is the position shown in FIGS. 12 and 15.

Then, since the rack 14 slides to the left in FIG. 15, the pushing wall 14d pushes the similar bin 15b of the gear 15, causing the gear 15 to rotate.

This rotation of the gear 15 causes the long pin 15a to move into the engagement groove 14.
b, and the rotation of the gear 15 continues due to the engagement, but the long bottle 15a finally comes out of the engagement groove 14b due to the rotation angle.

However, at this time, the long pin 15a rides on the rotation preventing surface 14f and prevents the gear 15 from rotating, so the rotation angle of the gear 15 is maintained at a constant angle and does not deviate from its rotational position.

This rotation of the gear 15 causes the gear 16 to rotate, and the arm 17 interlocked with this moves the pin 8b from the position shown in FIG. 5 to the position shown in FIG. moves to the threading position where it is pulled out from tape cassette A.

During this time, the guide grooves 6a, 6b, and 6c have stepped portions 6a+.
Since s 6 b+ t 6 C+ is formed,
The cassette box 7 is raised to a position higher than the insertion position of the tape cassette A, and the height between this position and the threading position can be set to the height necessary for setting the tape cassette in the tape cassette.

The height of the insertion slot 2 can be made lower than this height, so if the height of a tape recorder for automobiles etc. is restricted, the front panel 1 can be left above the insertion slot 2, and the front panel 1 can be left above the insertion slot 2. You can maintain your appearance.

During horizontal movement, the pin 8b contacts the cam surface 9a and rotates the arm 9 against the spring 10 as shown in FIG.

By this rotation of the arm 9, the key part 9b pushes the pin 4a of the door 4, opening the door 4, and when the pin 8b moves further, it separates from the cam surface 9a, so the force of the spring 10 causes the door to open.
is closed to prevent dust and the like from entering the door 4.

This opening and closing of the door 4 by the arm 9 is necessary because the tape cassette A cannot be ejected if the door 4 remains closed.

During this loading, when the cassette box 7 reaches the corner of the guide grooves 6a, 6b, 5c, if the door 4 side of the cassette box 7 is lowered due to vibration etc. as shown in FIG. 22, the pin 8c is In the horizontal direction, the pin 8a becomes unable to move vertically.

Therefore, further transfer of the cassette box 7 becomes impossible.

However, when the cassette box 7 reaches this corner, the pushing part 49a of the spring plate 49 pushes down the back side of the cassette box 7, keeping the cassette box 7 horizontal.
There is no possibility that the cassette box 7 cannot be transferred as described above.

In this way, the cassette box 7 is vertically lowered, the lid is opened, and the cassette box 7 is set at the threading position.

By setting the tape cassette to the threading position, the tape cassette A presses the switch 51 shown in FIG. 2, turning it on.

Further, when the tape force set A is set at the threading position, the two tape end sensors 52 shown in FIG. 2, which detect the end of the tape in the tape cassette A, start operating.

However, even if a foreign object or tape cassette A is inserted into the insertion slot 2 in the wrong direction and the cassette box 7 is pushed, the above-mentioned loading operation is performed and the cassette box 7 moves to the threading position. .

When the loading operation is performed due to such foreign matter or wrong direction, the switch 51 will not be pressed or the tape end sensor 52 will not operate normally.

When either one of them occurs at the threading position, the motor 11 immediately rotates in the reverse direction, causing the cassette box 7 to perform an eject operation that is opposite to the loading operation.

On the other hand, when the tape cassette A is set at the threading position, one end of the rotary arm 18 is pressed down by the tape cassette A, and the rotary arm 18 rotates to prevent its blocking portion 18b.
rises behind door 4, and one more tape cassette A
Prevent insertion of.

The blocking portion 18b may be raised immediately after the door 4 so that the door 4 is not opened.

In this way, when the rotation of the gear 15 ends and the long pin 15a is prevented from rotating by the rotation preventing surface 14f, the setting of the tape cassette A to the threading position is completed, but the rack 14 continues to move thereafter. And that pin 1
4a pushes the protrusion 26d of the swing locking body 26.

Then, due to the pressure of this projecting piece 26d, the swing locking body 2
6 swings around the hole 26b, the pin 26e is pulled out from the recess 30, and the swing locking body 26 becomes rotatable.

Therefore, the threader gear 25 also becomes rotatable, but the pin 14a fits into the groove 25a of the threader gear 25 due to the swinging of the swing locking body 26.

As the rack 14 moves, the threader gear 25 and the swing locking body 26 are rotated by being pushed by the pin 14a, and the rotation is transmitted to a series of gears 48 from the fan-shaped gear portion 25b.

This rotation of the swinging locking body 26 causes the pin 26c to separate from the locking piece 3, but at this time the pin 26c operates the switch 53, indicating that the cassette box 7 has arrived at the threader position and that the threader has started. is detected.

Then, by rotation of a series of gears 48, arms 44.
45 rotates and pushes the connecting rods 44a, 45a to move the slide block 32.33, and its guide roller 37.3
8 pulls out the tape from the tape cassette A, and guide pins 39 and 40 wind the tape around the cylinder head 36.

At this time, the spring 54 passes the dead center due to the rotation of the gear 48a, and thus again generates a biasing force in the pulling direction against the pin 48a1. Work to keep it in that position.

In conjunction with this operation, the arm 47 also rotates, and the pinch roller 43 is brought into contact with the capstan 42, allowing the tape to run, thus completing threading.

Next, the operation from this threading completion state to ejection will be explained.

Since the motor 11 starts rotating in the opposite direction based on an eject command from the outside, the rack 14 also starts to return in the opposite direction.

Therefore, the threader gear 25 and the swing locking body 26 are rotated in the opposite direction, so that the slide block 32, 33 and the pinch roller 43 are also returned to their initial positions by the rotation of the series of gears 48, and the threading gear 25 and the swing locking body 26 are rotated in the opposite direction. The attached tape is rewound into tape cassette A.

Due to this rotation of the gear 48a, the spring 54 pulls the pin 48a to pass through the dead center again, thereby biasing the gear 48a in the direction of arrow E.

This urging force is transmitted to the slide block 32 by the arm 44 and the connecting rod 44a, and urges it toward the end of the guide groove 34, but at this time, the shaft 32a abuts against the end of the guide groove 34. Not in contact.

Therefore, although some play occurs in the slide block 32, the tension arm 56, which is biased by the spring 55,
Since they are in contact with each other, this position is maintained without any wobble.

Further, the biasing force in the direction of arrow E to the gear 48a is
b is biased in the direction of arrow F.

Therefore, this urging force is transmitted to the slide block 33 via the arm 45 and the connecting rod 45a, and the shaft 33a of the slide block 33 is pressed against the terminal end of the guide groove 35 as shown in FIG. is held at the end position without any play.

Therefore, when the tape cassette A reaches the threading position next time, the guide roller 37.3B and the guide bin 3
9.40 gets into the back side of the tape and does not hit the tape and bend or damage it.

Furthermore, the biasing force of the spring 54 also biases the threader gear 25 in the opposite direction to the direction of the arrow, so that the pin 26c of the swing locking body 26 is pressed against the locking piece 31 of the chassis F. ,
This is to keep the swing locking body 26 and the threader gear 25 at their initial positions.

Further, after the threader gear 25 is reversely rotated as described above and the pin 14a is pulled out from the groove 25a, the swing locking body 26 is pulled by the spring 27 and swings, and the pin 26e is pulled out of the groove 25a. 30 to prevent rotation of the swing locking body 26 and the threader gear 26.

At the same time, since the pin 26c is pressed against the locking piece 31, the stop position of the swing locking body 26 is regulated, and the switch 53 can be stably turned on.

Next, the pushing wall 14c of the rack 14 presses the similar pin 15c to rotate the gear 15, and the long pin 15a is put into the engagement groove 14b to continue rotating the gear 15. Finally, the long pin 15a is pushed into the engagement groove 14b. When the gear 15 is separated from the gear 14b as shown in FIG. 17, the rotation of the gear 15 stops.

During this time, due to the reverse rotation of the gear 16, the cassette box 7 moves in the opposite direction to that at the time of loading, and reaches the opposite position on the back side of the insertion slot 2, and the tape cassette A is placed on the door 4. Become.

However, the rack 14 continues to retreat even after that, and at this time the long pin 15a rides on the rotation prevention surface 14e of the rack 14.
Further rotation of the gear 15 is prevented.

As the rack 14 retreats in this manner, the slide piece 19
The bent portion 19b is pushed by the rack 14, and the slide piece 19 slides rearward.

When the slide piece 19 retreats, the pin 20b held by the holding part 19C is pulled, so the rotating arm 20 rotates, and the first extrusion arm 21 is pulled by the spring 22 and rotated, and the extrusion arm 21 is rotated. The roll 21d is displaced forward.

At the same time, the first extrusion arm 21 rotates the second extrusion arm 23 and displaces its extrusion roller 23c forward, so that the extrusion rollers 21d and 23c extrude the tape cassette inserted into the cassette box 7, This makes extraction possible.

When the movement of the rack 14 is completed, the pin 14g of the rack 14 presses the switch 54 shown in FIG. At the position where 23 returns to the state shown in FIG. 1, the motor 11 stops.

If the extrusion rollers 21d and 23c cannot be displaced, the spring 22 will be extended even if the rotation arm 20 rotates, and the first extrusion arm 21 and the second extrusion arm 23 will not rotate. Damage and failure can be prevented.

〔Effect of the invention〕

As described above, in the present invention, the rotating member, which is a threader gear in the embodiment, has a pin of a swing locking body connected to the rotating member, which is engaged in a recessed part of the chassis. Rotation is prevented by.

Therefore, even if the threading mechanism, such as a slide block equipped with a guide roller that pulls out the tape from the tape cassette, is moved by vibration or other external force, it will not move, and the threading mechanism will remain in the position it was in before the threading operation started. It will be done.

Therefore, the tape cassette can always be set in the threading position without causing damage such as failure to set the tape or bending of the tape.

Then, the next time the linear motion member, which is a rack in the embodiment, and the rotating member engage, they will engage at the correct relative position, allowing for accurate threading operation.

Before the start of such threading operation, the engagement/disengagement part of the swing locking body is pushed by the linear motion member, and its pin is disengaged from the recessed part, so that rotation of the rotating member becomes possible, and at this time, the rotating member and the linear motion member are in an engaged state, so
Even when external forces such as vibrations are applied, the two are engaged in the correct mutual relationship.

Therefore, accurate threading operation is performed, and one motor can drive the loading mechanism and threading, reducing the number of motors and eliminating sensors and control circuits, thereby reducing costs and improving reliability. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a plan view with the cassette box and extrusion arm removed from Fig. 1, Fig. 3 is an exploded perspective view of the main parts, Fig. 4 is a front view, Figure 5 is a side view of the introduction section of the tape cassette before the tape cassette is inserted, Figure 6 is a side view of the same as above during loading, Figure 7 is a side view of the same as above after loading is completed and the thread is at the threading position. The figure is a front view of the rotating arm that prevents double insertion of tape cassettes, Figure 9 is a front view of the same as above when it is lowered, Figure 10 is a plan view of the tape cassette ejection mechanism, and Figure 11 is the same as above. Fig. 12 is a plan view of the rack operating section before it starts operating; Fig. 13 is a plan view during operation;
14 is a plan view of the same tape cassette extrusion mechanism in operation, FIG. 15 is a side view of FIG. 12, FIG. 16 is a side view of FIG. 13, Figure 17 is a side view of Figure 14, Figure 18 is a perspective plan view of the threader gear before operation, and Figure 18 is a perspective view of the threader gear before operation.
Figure 9 is a perspective plan view when the above threading operation starts, Figure 20 is a perspective view when the same operation is completed, Figure 21 is a side view showing the movement of the spring plate relative to the cassette box, and Figure 22 is the spring plate. FIG. 3 is a side view showing a cassette box inoperable state without the cassette box. DESCRIPTION OF SYMBOLS 11... Motor, 14... Rack, 14a... Pin, 25... Threader gear, 25a... Groove, 25
．． b... Gear part, 25c... Pin, 26... Swing locking body, 26a... Swing hole, 26b... Hole, 26c
...Pin, 26d...Protrusion piece, 26e...Pin, 2
7... Spring, 3o... Recess, 31... Locking piece, 3
2, 33...Slide block, 36...Cylinder head, 37.38...Guide roller, 48, 48
a, 48 b = gear, 44, 45... arm, 44a*45a... link, A... tape cassette, B... chassis. Patent applicant: Pioneer Corporation Figure 15 Figure 17 Figure 19 Figure 2Q

Claims (1)

[Claims] a linear motion member that moves linearly for threading; a rotation member that engages with the linear motion member and rotates to pull out the tape from the tape cassette and move a slide block provided with a guide roller; A swinging locking body whose locking part engages in a recessed part of a fixed member to prevent rotation of the rotating member; and a swinging locking body formed on the swinging locking body to prevent the rotating member from moving linearly before coming into contact with the linearly moving member. 1. A threading device for a tape recorder, comprising: an engagement/disengagement portion that contacts the member and pulls out the locking portion from the recess of the fixed member to enable rotation of the swing locking body and the rotating member.