JPH0364937B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a locking mechanism for a tape player, and in particular, a locking mechanism for a tape player that requires multiple locking positions, such as locking a head plate during play and fast forward/rewind. This invention relates to a locking mechanism capable of locking a member with a single electromagnetic plunger.

[Technical Field of the Invention] Recently, automation of tape players has progressed, and tape players have been proposed in which each operation is performed using the driving force of a motor or the suction force of an electromagnetic plunger. Among these, the motor's driving force can be used to move each member when switching between modes, because even a relatively small-capacity motor can obtain a considerably large driving force by using a reduction gear. Electromagnetic plungers, on the other hand, are often used to lock parts that have been brought into position by a motor, because their movement is instantaneous and easy to control.

By the way, each mode and function used in a tape player generally includes stop, play, fast forward, rewind, channel change, and pause.If all of these operations are automated, each operation other than stop will have its own dedicated function. A drive system and lock mechanism are required. Therefore,
Conventionally, attempts have been made to make tape players smaller and simpler by providing several drive systems and locking mechanisms with multiple functions.

From this point of view, the applicant previously proposed the following tape player.

That is, this mechanism includes two cam gears that can be linked with a motor, and two cam gears that are driven by each cam gear.
Equipped with two mode players, if one of the cam gears is unlocked and one mode plate is moved by the rotation of that cam gear, it becomes a fast forward or rewind state, and both cam gears are unlocked and both are moved. It enters the play state when the mode plate is moved. With this mechanism, when either mode plate moves, the head plate moves forward and presses the head against the tape (during play) or makes contact with the tape (during fast forward/rewind), and at the same time, during play, there is a pinch that works in conjunction with the head plate. The roller is crimped to the capstan shaft, and the idler is crimped to the reel base on the take-up side. Further, during fast forwarding and rewinding, the movement of one of the mode plates moves the change plate interlocked with this to the left and right, thereby pressing the fast forwarding and rewinding idler against the forward or reverse side idler. While the play or fast forward/rewind state continues, each electromagnetic plunger locks the rotation of the cam gear in the middle and locks the mode plate in the forward position, thereby preventing the head plate etc. from retreating to the stop position. are doing.

[Problems with the Background Art] It is true that the tape player described above has three modes, play and fast forward/rewind, using two drive systems and a lock mechanism, which greatly contributes to the miniaturization and simplification of the mechanism. However, there are the following problems in further miniaturizing and simplifying tape players.

That is, in the above mechanism, the electromagnetic plungers on the fast forward side and the rewind side lock their respective mode plates, so during play, the two electromagnetic plungers simultaneously lock the two mode plates that have moved forward together. I will do it. As a result, these two electromagnetic plungers cannot be used for operations such as program changes and pauses performed in the play state, and the range of use of the two electromagnetic plungers is severely limited. It can only support 3 modes. For this reason, a locking mechanism using a separate electromagnetic plunger must be provided for operations such as program change and pause, which impedes miniaturization of the tape player and also has the disadvantage of complicating the control system. arise.

[Object of the Invention] The present invention was proposed in order to solve the problems of the tape player described above, and the purpose is to lock each member during fast forwarding, rewinding, and playing by using one electromagnetic device. To provide a locking mechanism that can be performed by a plunger and other operations such as program change and pause can be controlled by another electromagnetic plunger, thereby obtaining a smaller and simpler tape player. It is in.

[Summary of the Invention] In the tape player locking mechanism of the present invention, mode plates on the fast-forward side and the rewind side, each having its own drive system, are connected via a joint plate rotatably attached to the mode plates. When each mode plate moves forward independently, the joint plate is rotated to the left or right, and when both mode plates move forward together, the joint plate is moved forward, and the joint plate is rotated. Accordingly, the fast forward rewind plate is moved from the central play position to the left and right fast forward rewind positions.

An engaging portion is provided on the head plate that moves forward when at least one of the mode plates moves forward, and during play, the fast forward rewinding plate at the neutral position is engaged with the engaging portion, thereby causing the fast forwarding rewinding plate to move forward. Even if one of the two electromagnetic plungers that prevents movement and rotation of the joint plate and holds each mode plate in the forward position is released, the other electromagnetic plunger will prevent the mode plate from moving. While the head plate is locked via the fast forward/rewind plate and the joint plate, the play state is maintained without moving.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be specifically described based on the drawings.

(1) Configuration Forward (fast-forward) side drive section This tape player consists of two parts: a forward side drive section and a reverse side drive section extending left and right in the figure.
It has two driving parts, which are installed in parallel in the vertical direction in the figure. A drive flywheel gear 1 common to each drive unit is disposed between each cam gear (to be described later) provided in each drive unit.

The configuration of the forward side drive section located at the bottom in the figure is as follows. The tip of a lock arm 3F is attached to an electromagnetic plunger 2F attached to the right end of the tape player. This lock arm 3 has a central shaft 4.
When the plunger is turned on, it can be rotated counterclockwise, and when it is turned off, it can be rotated in the opposite direction.

This lock arm 3F is a plate-like member extending laterally in the figure, and a lock portion 5F is provided protruding from the front surface of its left end.
This lock portion 5F has a roller-shaped tip and is capable of engaging with a stop portion and a mode portion of a cam gear, which will be described below.

A cam gear 6F is arranged above the lock arm 3F and close to the drive gear 1. This cam gear 6F has a notch 7F without gear teeth around it, and when this notch faces the drive gear 1, no driving force is transmitted from the drive gear, and the position of the notch shifts. In some cases, it is rotated by meshing with a drive gear.

A mode section 8F is provided near the back gear of the cam gear 6F in a direction facing the notch, and a stop section 9F is provided at a position slightly counterclockwise inside the mode section 8F. The mode section 8F and stop section 9F are
The lock part 5F maintains an interval that allows the plunger to pass through, and when the plunger is in the OFF state, the stop part 9F and the lock part 5F are also connected to each other.
In the ON state, the mode section 8F and the lock section 5F are configured to be able to engage with each other.

Further, a spiral-shaped intake cam 10F is provided at the center of the back surface of the cam gear 6F, and there are two bent portions on the outer periphery thereof. A spring plate 11F, which is attached to the tape player board and has a biasing force in the clockwise direction, is always pressed onto the surface of the drawing cam 10F. This spring plate 11F functions to slightly rotate the cam gear 6F when the cam gear 6F is unlocked at the start of play, thereby meshing the drive gear 1 and the cam gear 6F. Note that when the cam gear is stopped and locked, this spring plate 11F is pressed against the bent part on the short diameter side of the drawing cam 10F, and when the cam gear is stopped in the play state, it is pressed against the bent part on the long diameter side. It is crimped onto the bent part.

On the other hand, on the surface of the cam gear 6F, there is a drive cam 12 which has a spiral shape extending from the center.
F is provided. A mode plate 13F is disposed on the further surface of the drive cam 12F so as to be able to reciprocate from side to side in the figure, and is always urged in a direction away from the plunger by a spring 14F. This mode plate 13
A roller-shaped cam follower 17F is attached to the lower surface of F on the cam gear 6F side, and is in contact with the outer peripheral portion of the drive cam 12F. The position of this cam follower 17F is set so that it is located at the shortest radius of the cam gear 6F when the cam gear 6F does not mesh with the drive gear 1 and does not rotate. A protruding pressing portion 15F is provided near the center of the stroke on the drive gear 1 side of the mode plate 13F, and when the mode plate 13F moves forward (rightward in the figure), a pin of the lock plate 19 (described later) is pressed. It is something that presses on. Also,
An engaging pin 16F protrudes from the surface further toward the plunger on the pressing portion side and engages with a joint plate described later.

Reverse (rewind) side drive section The reverse side drive section is provided in parallel with the forward side drive section, and includes the electromagnetic plunger 2R,
Lock arm 3R, lock part 5R, cam gear 6R, notch part 7R, mode part 8R, stop part 9R, pull-in cam 10R, spring plate 11R, pressing part 15R, engagement pin 16
Similarly, it has a cam follower 17R.

However, the cutout 7R attached to the cam gear 6R is provided opposite to the cutout 7F of the cam gear 6F so that the cutout 7R faces the drive gear 1 in the stopped state.

Slide Plate and Joint Plate A slide plate 18 is disposed between each mode plate 13F, 13R so as to be reciprocatable in a direction parallel to the mode plates 13F and 13R. A small hole 18a is located approximately in the center of this slide plate 18.
A pressed pin 19a at the center of the lock plate 19 is provided in the small hole 18a and is reciprocably provided below the slide plate 18.
is inserted. This pressed pin 19a
has a length that reaches the mode plates 13F, 13R, and comes into contact with the pressing portions 15F, 15R of the mode plates 13F, 13R. The slide plate 18 and the lock plate 19 are regulated to move parallel to the direction of movement of the mode plate 19 by a slide groove 18b of the slide plate 18 and a pin P of the substrate.

On the other hand, a joint plate 20 is installed above each mode plate 13F, 13R with a tape player board sandwiched therebetween. The joint plate 20 has a substantially inverted triangular shape, and a guide pin 20a is attached to the apex thereof. The other two points have elongated holes 20F and 20R, respectively, and the mode plates 13F and 13R are inserted into these elongated holes.
The engagement pins 16F and 16R are engaged.
The engaging pins 16F and 16R move within elongated holes in a tape player board (not shown), and are regulated so that they always move in parallel in the lateral direction in the drawing.

Fast Forward Rewind Plate A fast forward rewind plate 21 is provided at a position that substantially overlaps the joint plate 20. The fast forward/rewind plate 21 is attached to the tape player board so as to be able to reciprocate toward the forward side and the reverse side. A fast forward rewind pin 22 is attached to the forward end of the fast forward rewind plate 21 and is connected to a search ring 35 on the head plate side, which will be described later. In addition, a guide groove 23 is provided in the forward direction of the joint plate 20 in a portion that overlaps with the central portion of the joint plate 20, and the guide pin 20a of the joint plate 20 is always engaged with this guide groove 23. When the joint plate 20 moves back and forth, the guide pin 2
0a reciprocates within the guide groove 23.

Head plate mechanism Head plate 25 with head 24 attached
is supported so as to be movable in the width direction of the tape player in the figure, and is always urged in the backward direction (to the left in the figure) by springs 26 and 27. This head plate 25 is driven by a spring 2 by the driving force of the drive unit so that the head 24 is pressed against the surface of the tape T running across the capstan shafts 28F and 28R during play on the tape player.
It is controlled so that it can move forward against the forces of 6 and 27.

A hold plate 29 is attached to the right side of the head plate 25 so as to be rotatable about a shaft 30. A head plate advancement pin 31 is attached to one end of the hold plate 29, and this pin 31 engages with a head plate arm 34, which will be described later. Further, this hold plate 29 is connected to the head plate 25 and the spring 3.
2, and is always connected to head plate 2.
5 in the backward direction. This spring 32 has a larger urging force than the springs 26 and 27 of the head plate 25.

There is a mounting shaft 33 on the back of the tape player board.
Head plate arm 3 can be rotated freely around
4 is installed. This head plate arm 34 has two arms, upper and lower. The head plate advancement pin 31 is engaged with a small hole 34a provided at the tip of the upper arm, and the slide plate is attached to the tip of the lower arm. A connecting pin 18c attached to 18 is engaged with the connecting pin 18c.

The search link 35 is rotated around the mounting shaft 33 of the head plate arm 34.
is attached to the surface of the tape player board. This search link 35 is provided with a control roller 35a, which engages with a control hole 36 provided in the head plate 25. The control hole 36 is an irregularly shaped hole having a U-shaped groove 36P and shallower right and left protrusions 36F and 36R on the head side, and a control roller 35 in the U-shaped groove 36P.
When a enters the search link 35, it is fixed in parallel, and when it enters the left and right convex parts 35F and 36R, the search link 35 is fixed diagonally.

Further, this search link 35 has a small hole 35b at its tip, and a fast forward rewind pin 22 attached to the fast forward rewind plate 21 is always connected in this small hole 35b.
By moving this fast forward/rewind pin 22 back and forth within the elongated hole 37 of the tape player board,
This is for rotating the search link 35.

A search plate 38 is inserted between the search link 35 and the substrate surface, and is adapted to engage and interlock with the head plate advancement pin 31 when it advances beyond a certain level.
This search plate 38 has a U-shaped recess 38a at its end on the head 24 side, which engages with the fast-forward rewind pin 22, and restricts the movement of the fast-forward rewind pin in the left-right direction when it is at the stop position. The search link 38 also has a spring 38b on the tape player board.
is energized by In addition, this spring 3
8b has a smaller bias than the springs 26 and 27 of the head plate 25 described above.

Further, between the head plate 24 and the tape player board, there are provided a roller change plate 39 that is interlocked with a pinch roller and an idler change plate 40 that is interlocked with an idler gear for driving the reel base.
The roller change plate 39 moves integrally with the back and forth movement of the head plate 25 by a member not shown. Note that a roller 39a is provided on the lower side of the roller change plate 39, and is inserted into a hole 40a provided in the idler change plate 40. Due to the engagement between the roller 39a and the hole 40a, the relationship between the two plates is such that they are free in the front-rear direction and are interlocked in the left-right direction when moving forward. A small hole 40b provided at the end of the idler change plate 40 is engaged with one end of a reverse link 41 that connects the plate to a program change mechanism, which will be described later.

Off-Plate An off-plate 42 is attached to the lower surface of the lock arm 3R of the reverse side drive section, so as to overlap with the lock arm 3R so as to move with it, and to be able to reciprocate with respect to the lock arm 3R. This off plate 42
are the off-plate pin 18d provided on the slide plate 18 and the spring 43.
The slide plate 18 is connected at all times.
is biased in the forward direction. This off plate 42 has a change control hole 44.
A chain pin 45 of a chain off plate 45, which will be described later, is provided in this hole.
a has been inserted. This change control hole has a wide relief part 44a and a narrow contact part 44b, and when the off plate 42 is retracted, the change pin 45a is inside the relief part 44a, and when the off plate 42 is moved forward, the change pin 45a is inside the relief part 44a.
5a is arranged within the contact portion 44b.

Program change mechanism A program change mechanism is located at the back of the reverse side drive section. This program change mechanism has a change off plate 4.
5, a change gear 43, and a switch change plate 47.

The change-off plate 45 is a plate-shaped member having a change pin 45a inserted into the change control hole 44 and a gear lock portion 45b for stopping and locking the change gear 43, and is attached to the tape player board so as to be reciprocatable. The direction of movement of the change-off plate 45 is perpendicular to the direction of movement of the mode plate, etc. in the drive section, and is biased in the backward direction by a spring 45c.

A change gear 46 is attached to the back surface of the change-off plate 45 at approximately the center thereof. This change gear 46 is an intermittent gear having toothless notches 46a at two opposing locations, and when the notches 46a face the flywheel 48, it is constantly rotated by the motor. flywheel 48
If the rotation of the cutout portion 46a is not transmitted and the position of the cutout portion 46a is shifted, the cutout portion 46a engages with the flywheel 48 and rotates. Two stopped portions 46b are provided on the surface of the change gear 46 facing each other in a direction perpendicular to the cutout portion 46a, and are engageable with the gear lock portion 45b of the change-off plate 45.

Furthermore, a switch change plate 47 is provided on the back surface of the change gear 46. The switch change plate 47 has a long hole 47a into which a pin 46c attached to the change gear 46 is inserted, whereby the rotation of the change gear 46 is transmitted to the switch change plate 47. One end of this switch change plate 47 is attached to the tape player board so that it can reciprocate, and moves back and forth in the same direction as the change off plate 45 as the change gear 46 rotates. Further, a U-shaped recess 47b is provided on the head side of the switch change plate 47, and is connected to the idler change plate 40 by inserting the aforementioned reverse link 41 into the U-shaped recess 47b. As the switch change plate 47 moves back and forth, either the forward side or reverse side pinch roller presses against the capstan shaft, and the idler gear engages with the forward side or reverse side reel base.
This is a program change.

Note that the switch engine plate 47 is provided with a leaf spring, which serves as a pressing piece for the output signal changeover switch of the head.

Electromagnetic plunger By the way, the electromagnetic plungers 2F and 2R
is controlled ON and OFF in each mode of the tape player as follows.

That is, in the fast-forward mode, only the forward-side electromagnetic plunger 2F is turned on among both the electromagnetic plungers 2F and 2R, which are both turned off, and in the rewind mode, only the reverse-side electromagnetic plunger 2R is turned on.

Both electromagnetic plungers 2 at the start of play
After both F and 2R are turned on, only the electromagnetic plunger 2R on the reverse side is turned off after a predetermined timing (after the cam gear starts rotating).

In the play state, only the forward electromagnetic plunger 2F remains on, and during other operations in the play state (program change operation), the reverse electromagnetic plunger 2R, which is off in the play state, temporarily remains on. It turns on.

(2) Action Stop state...Fig. 1, Fig. 5 In the stop state, both the forward side electromagnetic plunger 2F and the reverse side electromagnetic plunger 2R are OFF, so both lock arms 3F and 3R continue to rotate clockwise. It is. At this time, the notches 7F and 7R of each cam gear 6F and 6R are facing the drive gear 1, and the lock part 5 of each lock arm 3F and 3R is facing the drive gear 1.
F and 5R are the respective stop parts 9F and 9 of the cam gear.
It is engaged with R. Therefore, each spring plate 11F, 11R is
Cam gears 6F and 6R do not rotate even though the drawing cam is pressed so as to contact the bent portions of the rectangular sides of F and 10R and contact the flat portions thereof. Therefore, each mode plate 13
F, 13R, slide plate 18, and lock plate 19 remain in the retracted position, and the joint plate 20, which is connected to each mode plate 13F, 13R with engagement pins 16F, 16R, retracts while maintaining the parallel state. in position. Since the guide pin 20a attached to the joint plate 20 is also in the neutral position, the guide pin 20a does not press the guide groove 23 of the fast forward rewinding plate 21 to either the forward or reverse side, and the fast forwarding rewinding plate 21 is stopped midway through its travel stroke.

On the other hand, the slide plate 18 is connected to the connecting pin 18c attached to the slide plate 18.
The head plate arm 34, which is interlocked with the slide plate 18, is rotating counterclockwise because the slide plate 18 is in the retracted position. Since the upper arm of the head plate arm 34 does not press the head plate advancement pin 31 inserted into the small hole 34a provided at its tip, the head plate 25 does not move forward and the spring 2
It is in the retracted position due to the urging forces of 6 and 27. Since the head plate arm 34 is rotating counterclockwise and the head plate 25 is retracted, the hold plate 29 is retracted together with the head plate 25 by the bias of the spring 32. Accordingly, the search plate 38 that engages with the head plate advance pin 31 is also biased by the spring 38b to the retracted position, and the movement of the fast forward/rewind pin 22 is restricted by the U-shaped recess 38a.

The search link 35, which is located on the back side of the head plate 25 and is connected to the fast-forward rewind plate 21 by the fast-forward rewind pin 22, is
Since the fast forward/rewind plate 21 is in the neutral position, it is parallel to the moving direction of the head plate 25. Since the head plate 25 is retracted, the control roller 35 of the search link 35 is moved to the U-shaped groove 36P of the control hole 36.
It is in a free position on the extension.

At this time, the program change mechanism is in the following state. First, the change-off plate 45 is in the retracted position, and the change-off plate 45 has a change pin 45a on the off-plate 4.
Off plate 42 because 2 is not moving forward
It is located within the relief part 44a of the change control hole 44. Further, the change gear 46 has a notch 46a facing the flywheel 48, and a gear lock portion 45b of the change off plate 45 and the change gear 4
Since the stopped portion 46b of No. 6 is engaged and the change gear 46 is locked, the change gear 4
6 does not rotate. And change gear 4
Switch change plate 47 linked with 6
is stopped at a position where it has retreated to the forward side or a position where it has completely moved forward to the reverse side. Therefore, the idler change plate 40 and the roller change plate 39, which are sequentially connected via the reverse link 41, are also stopped facing the operating direction of the program change mechanism. Note that, as described above, the roller change plate 39 advances integrally with the head plate 25 in the direction of movement of the head plate 25.

At the start of play...Figure 2 When the power to the tape player is turned on and each electromagnetic plunger 2F, 2R is turned on, the lock arms 3F, 3R rotate counterclockwise,
Each lock member 5 of lock arms 3F and 3R
F and 5R are respectively the cam gear stop portions 9F,
Leave 9R. Then, the cam gears 6F, 6R, which had until now stopped against the pressing force of each spring plate 11F, 11R, are shifted from the bent portions of the drawing cams 10F, 10R, and are pressed against the flat portions of the spring plates 11F, 11R. The flywheel 1 and each cam gear 6F,
6R engages, and cam gears 6F and 6R begin to rotate. At the same time, mode plate 1
Cam follower 17F, 17R on 3F, 13R
When the cam gears 6F and 6R rotate slightly, the drive cam 1 on the surface of the cam gears 6F and 6R
Contact with 2F, 12R, cam gear 6F, 6R
With the rotation of the mode plates 13F, 13R
It moves forward.

When the cam gears 6F and 6R begin to rotate in this manner, only the reverse side electromagnetic plunger 2R is immediately turned off, and the lock arm 3R rotates clockwise to return to the same position as in the stopped state. However, since cam gear 6R has already started rotating, plunger 2R is turned off.
Even so, the mode plate 13R moves forward together with the forward side mode plate 13F. Further, the slide plate 18 and lock plate 19 located between each mode plate 13F, 13R are such that the pressed pin 19a on the lock plate is connected to each mode plate 13F, 13R.
Since the pin 19 is in contact with the pressing portions 15F and 15R, the pressed pin 19 is pressed by the advancement of the mode plates 13F and 13R, thereby moving forward.

On the other hand, when the engagement pins 16F and 16R of each mode plate 13F and 13R move forward simultaneously, the joint plate 20 connected thereto
also moves in parallel, and the guide pin 20a of the joint plate 20 moves in parallel with the fast forwarding and rewinding plate 2.
Since the fast-forwarding/rewinding plate 21 is moved in parallel to the right in the figure in the guide groove 23 of No. 1, it is not pressed to either the forward side or the reverse side and maintains a neutral position.

Each member on the head plate side at this time is as follows. First, the head plate arm 34 interlocking with the connecting pin 18c of the slide plate 18 begins to rotate clockwise as the slide plate 18 moves forward. Therefore, the upper arm of the head plate arm 34 presses the head plate advancement pin 31 below the hold plate 29, and the head plate 25 to which the hold plate 29 is attached begins to move forward. The spring 32 that urges the hold plate 29 in the head plate backward direction is
Since the biasing force is larger than the springs 26 and 27 that bias the head plate 25, when the hold plate 29 is pulled in the forward direction, the hold plate 29 alone does not rotate and can move forward together with the head plate 25. When the head plate advancement pin 31 of the hold plate 29 advances to a certain position, the search plate 38 engages with it and begins to advance.

At this time, the search link 35 maintains the same position as in the stopped state because the fast forward rewinding plate 21 maintains the neutral position. Further, the head plate 25 is still moving forward, and the control roller 35a is in the control hole 3.
It does not fit into the U-shaped groove of 6. On the other hand, the program change mechanism does not operate for the following reason. In other words, the reverse side plunger 2R is ON.
Thus, the off plate 42 also rotates in the direction of unlocking the cam gear (counterclockwise in the figure) together with the lock arm 3R. However, in this state, the off plate 42 has not moved forward yet, so the change pin 45 of the change off plate 45
a is the relief part 4 of the change control hole 44
4a, even if the off plate 42 rotates, it is not pressed from any side of the relief part, so
The change-off plate 45 does not move and the program is not changed.

Also, plunger 2R is immediately after that.
OFF and the off plate 42 also returns to its original position, so even if the off plate 42 moves forward and the change pin 45a moves from the relief part 44a of the change control hole 44 to the contact part 44b, it will not be pressed against the side of the contact part. There is no program change.

Play state...The forward side cam gear 6F that was rotating in the state shown in Figs. 3 and 6 has its notch connected to the drive gear 1.
The rotation stops when the cam gear 6F is reached, and the lock portion 5F of the lock arm 3F engages with the mode portion 8F of the cam gear 6F, thereby locking the cam gear 6F. In addition, in the reverse side cam gear 6R, since the plunger 2R is OFF and the lock arm 3R is rotating clockwise, the lock portion 5R does not engage with the mode portion 8R of the cam gear 6R, and the cam gear 6R rotates once. Then, the notch portion and the drive gear 1 face each other, and the stop portion 9R and the lock portion 5R engage to lock the cam gear 6R.

At this time, mode plate 1 on the forward side
3F, the cam follower 17F is the drive cam 1
Since it is at the longest diameter part of 2F, forward movement has been completed, and both the slide plate 18 and lock plate 19 have completed forward movement. Accordingly, the head plate arm 34 connected to the slide plate 18 pulls the hold plate 29 to complete the advance of the head plate 25 to the position where the head 24 presses against the tape.

On the other hand, the reverse side cam gear 6R rotates once, so the mode plate 1 has completed forward movement.
The 3R cam follower 17R faces the drive cam at its shortest diameter portion, and the mode plate 13R attempts to retreat due to the spring 14R. However, since the joint plate 20 is fixed in parallel at the fully advanced position, the mode plate 13R can be stopped at the advanced position.

That is, when the head plate 25 completes its forward movement, the recess 38a of the search plate 38 restricts the movement of the fast forward/rewind pin 22 in the left and right direction, thereby preventing the search link 35 from rotating. The control roller 35a attached to the head plate 25 is connected to the U-shaped groove 3 of the control hole 36 of the head plate 25.
In order to enter 6P, the search link 35 is fixed at the neutral position. Therefore, search link 35
The fast-forward rewind pin 22 on the fast-forward rewind plate 21 inserted into the small hole 35b of the fast-forward rewind plate 21 also remains in that position.
1 is fixed at the midpoint of the moving stroke. Then, the guide pin 20a of the joint plate 20 located at the tip of the guide groove of the fast forward/rewind plate 21 tries to rotate counterclockwise in the figure, but it is caught in the guide groove 23 and fixed, and eventually The joint plate 20 fixed by the engagement pin 16F and the guide pin 20a is fixed parallel to the mode plate 13 in the forward position and connected to the engagement pin 16R.
R also stops at the forward position.

Each member operates in this manner, and the play state continues while the forward side plunger 2F is ON. Also, at this time, since the plunger 2R on the reverse side is in the OFF state, the change pin 45a on the change off plate 45
Even if the change pin 45a is located within the contact portion 44b of the change control hole 44 of the off plate 42, the change pin 45a is not pressed by the off plate 42, and no program change is performed.

Fast forwarding and rewinding...Fig. 4, Fig. 7 When a fast forwarding instruction is given and the forward side electromagnetic plunger 2F is turned on, the lock arm 3F rotates counterclockwise, and the mode plate 1 is rotated by the rotation of the cam gear 6F.
3F, lock plate 19, slide plate 18, head plate arm 34, and head plate 25 perform a series of movements similar to those during play.

The difference from when playing is mode plate 13
F moves and the mode plate 13R does not move, so the joint plate 20 is moved around the engagement pin 16R of the mode plate 13R.
rotates counterclockwise. Since the shaft 20a of the joint plate 20 is fitted into the guide groove of the fast-forward rewinding plate 21, the fast-forwarding rewinding plate 21 moves in parallel toward the forward drive section as the joint plate 20 rotates. Furthermore, fast forward rewind pin 2
2 connects the search link 3 through the long hole 37 of the board.
Since the search link 35 is engaged with the small hole 35b of No. 5, the search link 35 also rotates in the same direction. This rotation causes the control roller 35a on the search link 35 to move toward the convex portion 3 of the control hole 36.
It moves to the 6F side and enters the convex portion 36F of the control hole 36 as the head plate 25 moves forward. At this time, the recessed portion of the search plate 35 advances as the head plate 25 advances, and when the head plate 25 completes its advance,
The fast forward rewind pin 22 is disengaged. As a result, the fast forward rewinding pin 22 completes its movement toward the forward side at the same time as the head plate 25 completes its forward movement.

In conjunction with this, the idler gear meshes with the forward side reel base, and rapid feed is performed.

Note that the convex portion 36F of the control hole 36 is shallower than the U-shaped groove 36P, and since the head plate 25 is fixed in front of the play position, the pinch roller and play idler are in a released state.

In the case of rewinding, the basic movement is the same as fast forwarding, only the forward side and reverse side are symmetrically swapped. That is, the electromagnetic plunger 2F remains OFF, the electromagnetic plunger 2R is turned ON, the mode plate 13R moves, the joint plate 20 rotates clockwise, and the fast forward/rewind plate 21 moves toward the reverse drive section. Move in parallel. Also, the control roller 35a on the search link 35
enters the convex portion 36a of the control hole 36.

At the start of a program change...In the play state shown in Figure 8, when the program change switch is pressed, the reverse side electromagnetic plunger 2R, which has been in the OFF state, is turned ON. At this time, since the off plate 42 maintains the forward position, the change pin 45a of the change off plate 45 is in the same position as in the play state. and,
When the plunger 2R turns ON and the lock arm 3R rotates counterclockwise, the off plate 42 attached to the lock arm 3R also rotates, and the reverse side side of the contact portion 44b of the change control hole 44 is turned off. Press the change pin 45a of the plate 45 toward the forward side.

As a result, the entire change-off plate 45 moves to the forward side, and the gear lock portion 45b on the change-off plate 45 separates from the gear lock portion 45b of the change gear 46, releasing the lock on the change gear 46. As a result, the change gear 46 rotates a little and meshes with the flywheel 48, and then the flywheel 48 starts rotating.

The reason why the change gear 46 rotates a little and engages the flywheel 48 is due to the spring action of the output signal changeover switch pressing piece of the head provided on the switch change plate 47, the idler gear neutral position return spring (not shown), etc. This is because it is biased to the neutral position.

Then, when the change gear 46 rotates, the pin 46c attached to the back side presses the switch change plate 47, and the switch change plate 47 begins to move toward the forward side, and as a result, the reverse link 4
The roller change plate 39 (not shown) on the back surface of the head plate 25, which is connected to the switch change plate 47 via the switch 1, begins to move toward the reverse side.

When the electromagnetic plunger 2R is turned ON at the start of this program change, the lock of the cam gear 2R is released and the cam gear 2R starts rotating, as at the start of play, but since the mode plate 13R has already completed forward movement, the cam gear 6R is It is in a state of confusion.

Program change complete...Figure 9 Electromagnetic plunger 2R, which was turned ON at the start of program change, immediately turns OFF again. Since the lock arm 3R and the off plate 42 rotate clockwise and return to their original positions, the change pin 45a located in the abutment part of the change control hole 44 is inserted into the abutment part 44.
It no longer comes into contact with the reverse side side of b. Then, the change-off plate 45 returns to the stopped position due to the biasing force of the spring 45c.

Further, the change gear 46 continues to rotate, and the switch change plate 47 continues to advance toward the forward side. and change gear 4
When the part of the stopped part located at 6 on the opposite side from the stopped state comes to engage with the change-off plate 45 and the gear lock part 45b,
This locks the change gear 46,
When the notch 46a faces the flywheel 48, the rotation of the change gear 46 is stopped.

In addition, after the cam gear 6R, which had been spinning idly, rotated once, the notch part faced the flywheel 1, and the lock part 5R of the lock arm 3R
The stop portion 9R engages with the cam gear 6R to lock the cam gear 6R, and the rotation of the cam gear 6R is stopped.

On the other hand, when the stitch change plate 47 completes moving toward the forward side, the roller change plate 39 on the head plate 25 side, which is connected via the reverse link 41, completes its movement toward the reverse side, thereby causing the forward side pinch roller to move away from the capstan shaft. The pinch roller on the reverse side presses against the captan shaft, and at the same time the idler change plate 40 also moves to the reverse side and the idler gear engages with the reel base on the reverse side, completing the program change from the forward side to the reverse side and running on the reverse side. becomes.

Although the state of channel change from the forward side to the reverse side has been shown above, the channel change from the reverse side to the forward side is performed in the same manner.

End of play ~ Stop state When the play state ends, the electromagnetic plunger 2F, which has been in the ON state until now, is turned OFF.
Then, the lock arm 3F rotates clockwise in the figure, and the lock portion 5F of the lock arm 3F separates from the mode portion 8F of the cam gear 6F. At this time, the spring plate 11F is located at the long diameter bent part of the pull-in cam 10F, but since the lock of the cam gear 6F is released, the pull-in cam 10 is pressed against the flat part of the pull-in cam 10F.
Press F to rotate the cam gear 6F a little.

Then, the cam follower 17F, which was in contact with the longest diameter part of the drive cam 12F, leaves due to the rotation of the cam gear 6F, and the mode plate 13F, cam follower 17F, and joint plate 2
0 is retreated by the biasing force of the spring 14F and returns to the stop position. At the same time, when the joint plate 20 is no longer fixed, the reverse side mode plate 13R is also urged by the spring 14R and moves backward. On the other hand, the pull-in cam 10F is further pressed by the spring plate 11F and rotates together with the cam gear 6F to a position where the spring plate 11F comes into contact with the bent portion on the short diameter side, and at this point, the stop portion 9F of the arm gear and the lock portion of the lock arm 3F engage. Therefore, the rotation of cam gear 6F stops.

As mentioned above, mode plates 13F and 13R
When the pin 19a of the lock plate 19 moves backward, the pressed pin 19a of the lock plate 19
The lock plate 19 and the slide plate 18 interlocked with the lock plate 19 are in a free state.
As a result, the head plate 25 loses its supporting force and retreats due to the urging force of the springs 27 and 28, and the control roller 35a leaves the control hole 36 and the U-shaped groove 36P and becomes free, while being interlocked via the head plate link 34. The slide plate 18 and lock plate 19 return to the stop position as the head plate 25 retreats.

As explained above, in this embodiment, since the play, fast forward and rewind states can be locked with one plunger, the program can be changed using the other plunger. There is an advantage that control of four types of modes is possible.

In this embodiment, only the use for program change is shown, but it is also possible to use it for pauses and the like.

[Effects of the Invention] As described above, according to the lock mechanism of the present invention, by providing an engaging portion such as a U-shaped groove in the head plate and engaging a part of the fast forward/rewind plate therein, Since it is possible to lock only the plunger on the forward side during play, it can be used for programming, pausing, and other operations of the other plunger, making it possible to provide a tape player that is smaller, has a simpler structure, and is more economical.

[Brief explanation of drawings]

1 to 9 are plan views showing one embodiment of the locking mechanism of the present invention, in which FIGS. 1A and B show the drive section in a stopped state, and FIGS. 2A and B show the drive section at the start of driving force transmission. Drive unit, Figures 3A and B show the drive unit in the play state, Figure 4 shows the relationship between the drive unit and the fast forward rewind plate during fast forwarding, Figure 5 shows the head plate side mechanism in the stop state, and Figure 6 7 shows the head plate side mechanism in the play state, FIG. 7 shows the head plate side mechanism during fast forwarding, FIG. 8 shows the channel change mechanism at the start of a program change, and FIG. 9 shows the channel change mechanism when the program change is completed. 1... Flywheel, 2F, 2R... Electromagnetic plunger, 3F, 3R... Lock arm, 5F,
5R...Lock part, 6F, 6R...Cam gear, 7
F, 7R...Notch part, 8F, 8R...Mode part,
9F, 9R...Stop part, 10F, 10R...
Call-in cam, 11F, 11R... Spring plate, 12F, 12R... Drive cam, 13F,
13R...Mode plate, 14F, 14R...
Spring, 15F, 15R... Pressing part, 16
F, 16R...Engagement pin, 17F, 17R...Cam follower, 18...Slide plate, 18a...
...Small hole, 18b...Slide groove, 18d...Off plate pin, 18c...Connection pin, 19...
Lock plate, 20...joint plate,
21a...Guide pin, 21...Fast forward rewinding plate, 22...Fast forwarding rewinding pin, 23...Guide groove, 24...Head, 25...Head plate, 26F, 26R...Capstan shaft, 27,
28... Spring, 29... Hold plate, 30... Shaft, 31... Head plate advancement pin, 32... Spring, 34... Head plate arm, 35... Search link, 35a...
Control roller, 36...control hole,
36P...U-shaped groove, 36F, 36R...Protrusion, 3
8...Search plate, 38a...Recess, 38b
... Spring, 39 ... Roller chain plate, 39a ... Roller, 40 ... Idler chain plate, 40a ... Hole, 40b ... Small hole, 4
1...Reverse link, 42...Off plate,
43... Spring, 44... Change control hole, 44a... Relief part, 44b... Contact part,
45...Change off plate, 45a...Change pin, 45b...Gear lock part, 46...Change gear, 46a...Notch part, 46b...Stopped part, 46c...Pin, 47...Switch change plate, 47a... ...Long hole, 48...Flywheel.

Claims (1)

[Scope of Claims] 1. Mode plates for fast forwarding and rewinding, each having its own drive system, and a head plate that moves forward in conjunction with at least one of these mode plates, and each mode plate is provided with a head plate. In a tape player having respective electromagnetic plungers for locking the plate in the forward position, each of said electromagnetic plungers is such that only the electromagnetic plunger on either side is turned on in fast forward or rewind mode, and both electromagnetic plungers are turned on at the start of play. After both plungers are turned on, only one electromagnetic plunger is turned off, and in the play state, only one electromagnetic plunger is turned on, and during other operations in the play state, the electromagnetic plunger on the side that is off in the play state is turned off. The mode plates are connected to each other via a joint plate that is rotatably attached to them, and as the joint plate rotates, fast forward movement from the central play position to the left and right can be performed. A fast-forward rewind plate that moves to a rewind position is connected to the head plate, and a portion of the fast-forward rewind plate is engaged with the head plate when the fast-forward rewind plate is in a central play position and the head plate is advanced. A locking mechanism for a tape player, characterized in that it is provided with an engaging portion that fits together. 2. The engaging portion of the head plate is a U-shaped groove, and branch holes are formed on both sides of the U-shaped groove into which a part of the fast-forwarding and rewinding plate is inserted during fast-forwarding and rewinding. The locking mechanism of the tape player described in Section 1.