JPH0376544B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a program change control device for a tape player, and in particular, uses two suction plungers to control play, fast forward, rewind, etc.
This invention relates to a tape player that is configured to execute each stop mode, and is capable of controlling even program changes by using plungers for controlling these four modes as they are.

[Technical Background of the Invention] There are five tape player modes: stop, play, fast forward, rewind, and program change.Recently, tape players have become more automated, and each mode can be maintained and switched using electromagnetic technology. By utilizing the attraction force of the plunger and the driving force of the motor, a tape player has been put into practical use that allows switching between modes with the extremely light operation of simply pressing a switch, without the need for manual operating force. .

In such an automated tape player, while a certain mode is being executed, the parts of other modes are locked so that they do not move, and then when the other mode is being executed, the previous locks are released. It is necessary to move each member to a predetermined position in conjunction with a power plate that is moved by a motor. Control of locking of the members and interlocking with the power plate in each of these modes is normally performed by a plunger. However, the control plunger has a complicated structure and requires many man-hours to manufacture, and is expensive compared to other members made of sheet metal, etc. Therefore, by controlling multiple modes with one plunger, the whole tape player Attempts have been made to reduce the number of plungers. Up to now, the mechanism with the greatest reduction in the number of plungers has been considered to use three plungers to execute the five modes.

That is, while the head plate and other members are moving to a predetermined mode position, each member is connected to the power plate, and after the head plate and other members are moved to a predetermined mode position, they are separated from the power plate and the mode position is maintained. This operation is performed by turning on two plungers simultaneously in the play mode, and by turning on one plunger each in the fast forward or rewind mode. and,
During each mode, the third plunger controls the locking of the power plate that is separated from the member in that mode, and the operation of unlocking the power plate and executing a program change. In addition,
The fifth mode, stop mode, is running with all three plungers off.

[Problems in the Background Art] Now, in order to further improve the mechanism in which each mode is controlled by three plungers, and to control all modes by two plungers, the following steps are required. There are problems such as.

That is, if the conventional third plunger for program change is removed, it will be necessary to use the remaining two plungers to unlock the power plate for program change operation.
However, since the program change is executed from the play mode, and during the program change the head plate and other parts remain in the same position as in the play mode, the two plungers must be turned off for the program change. When the power plate is unlocked, the head plate, etc. held by these plungers are unlocked and enters stop mode, making it impossible to change the program. on the other hand,
In order to hold the head plate and the like in the play position, the power plate cannot be unlocked by simply turning off one plunger, and in this case, program change is also impossible.

Next, we will focus on program changes and
It is also conceivable that each mode is maintained by engaging and holding the power plate with each member using the second plunger, and the program is changed by turning the second plunger on and off to unlock the power plate. However, since one plunger can only have two modes, on and off, it is impossible to control the three modes of play, fast forward, and rewind with just one plunger, and even with this method, two plungers can control the tape player It is not possible to control all modes of

In this way, with the conventional technology, it was considered impossible to control all five modes of a tape player using two plungers, and each mode had to be controlled using three plungers. It is.

[Object of the invention] In order to solve these problems, the applicants have
In Japanese Patent Application Laid-Open No. 60-212853, we proposed a tape player that can control five modes using two plungers. The invention of this earlier application improves the fast-forwarding and rewinding mechanism of a tape player. In the play mode, one plunger locks each member, and the remaining plunger unlocks the power plate. For example, channel change is performed.

By the way, when the channel change operation is performed by the remaining one plunger as in the invention of the earlier application, it is possible to control the tape player in 5 modes even if the conventional device is used as is, but the invention of the earlier application Since the fast forward/rewind mechanism itself is new,
A program change control device used in combination with this is also desired to be more rational and mechanically reliable than the prior art.

The present invention was proposed in view of the above-mentioned prior art, and its purpose is to provide a tape player capable of controlling all five modes of the tape player using two suction plungers. An object of the present invention is to provide a program change control device.

That is, a specific object of the present invention is to turn off both the first and second suction plungers in the stop mode, turn them both on in the play mode, and turn one of them on and the other off in the fast forward/rewind mode. Furthermore, in a tape player in which the program change mode turns the second plunger on and off, when transitioning to the play mode, the first and second plungers are switched on and off.
Both plungers are turned on and the head plate and other parts are moved to a different position than in the fast forward/rewind mode where only one of the plungers is turned on, and after each of these parts reaches the play mode position, These parts are separated from the power plate and held in the play position by the first plunger, which is used to lock the power plate, allowing the second plunger to be used for program changes. This prevents the head plate and other members from being unlocked even when turned on and off.

[Summary of the Invention] In order to achieve the above object, the present invention employs the following configuration.

First, an engaging means is provided between the power plate and a member such as a head plate that moves from the stop position to each mode position, and this engaging means is connected to the first and second plungers. Interlocking retaining means hold at least one of the two plungers engaged when on to move the head plate or the like to a play or fast forward rewind position.

In this case, a control plate is provided which is controlled by turning on and off the first and second plungers to control the play position and fast forward/rewind position of each member such as the head plate. Each member is moved to the play position only when both plungers are on.

For the head plate and other members that have reached the play mode position, a locking means is provided that is controlled by turning on and off the first plunger, and when the first plunger is turned on when entering the play mode, the first plunger is turned on. The lightening means is then activated to lock each member in the play mode position.

On the other hand, the power plate separated from the head plate and other members locked by the locking means is locked by the locking means controlled by the second plunger that is still turned on. Locks in a position disconnected from the drive system on the motor side.

The program change operation is performed by turning off the second plunger that is on in the play mode, releasing the locking means of the power plate, connecting the power plate to the drive source on the motor side, and moving the power plate. Therefore, the program change mechanism is moved to a position where the tape is run in the opposite direction to the previous play mode.

At this time, a head plate position detection mechanism is provided between the power plate and the program change mechanism, and this position detection mechanism allows the power plate to move the change plate only when the head plate is in the play position. When the head plate is in the stop position, the power plate moves and the change plate does not move even if the head plate moves to the play or fast forward/rewind position.

[Embodiment of the Invention] An embodiment of the present invention will be specifically described below with reference to the drawings.

In this embodiment, the fast forward mode is executed with the first plunger turned off, and at this time, the second plunger locks the power plate and holds each member, while the second plunger is turned off. When the rewind mode is executed, the first plunger that is turned on holds each member, and the control plate that is interlocked with the second plunger that is turned off locks the power plate. Therefore, in this embodiment, the first plunger is called a fast-forward plunger, and the second plunger is called a rewind-side plunger.

(1) Structure of the embodiment Head plate...Figs. 1 to 3 The head plate 1 is equipped with a head (not shown), and is connected by front and rear guide pins 2, 2' fixed to the base of the tape player. ,
It is supported so as to be movable in the vertical direction in the figure.

When this head plate 1 is in the forward position (lower part in the figure), it is in a play state where the head is pressed against the tape, and when it is in a position slightly backward from the forward position, it is in a fast forward rewind state where the head and tape are in slight contact. When the head is in the fully retracted position (upper part of the figure), the head comes out of the cassette and is in a stopped state, completely separated from the tape. Further, the head plate 1 switches the drive system (reel base, capstan, pinch roller, etc.) of a tape player (not shown) between stop and play by moving back and forth.

Furthermore, a position detection pin 1b is provided at the right end of the head plate 1 in the drawing, and engages with a position detection link to be described later to regulate its position, thereby controlling program change. There is.

On the other hand, a link 3 is provided at the front of the head plate 1 on the left side in the figure, which is rotatably attached to a shaft provided on a base. A pin is fixed to one end of the link 3, and this pin faces a pressing portion formed at the end of the head plate 1. A spring 4 is stretched between the link 3 and the head plate 1 to pull them together. This spring 4
This serves as a displacement absorbing means for the stroke difference between the head plate 1 and the power plate, which will be described later.

Further, a stop spring 5 is provided between the link 3 and the base of the tape player for biasing the link 3 and the head plate 1 interlocked with the link 3 via a pin in the backward direction. . Spring 5 for this stop
is set to such a force that it can be released against the urging force of each spring (plunger adsorption spring, fast forward/rewind control plate rotation spring) to be described later.

Engagement means for head plate and power plate...Figs. 1 to 3 A proximal end of a head plate 6 is movably connected to the other end of the link 3 via a pin. This headlock plate 6 is
It is a member that extends in the horizontal direction in the figure, and rotates up and down about a pin at its base end.
The headlock plate 6 is provided with an engagement hole having a tapered engagement portion 6a and a relief portion on the distal end thereof, and a pressing protrusion of the power plate extending later is inserted into this engagement hole. ing.

Further, a hook-shaped engaging portion 6b, which constitutes a holding means for the advanced headlock plate 6, is integrally formed at the tip of the headlock plate 6. On the board of the tape player, opposite to this hook-like engaging portion 6b,
A lock plate 7 is rotatably supported around an axis, and a roller-shaped engagement member 7a provided on the lock plate 7 can engage with a hook-shaped engagement portion 6b of the head lock plate. There is. That is, the lock plate 7 is always urged counterclockwise by the spring 8, and the roller-shaped engagement member 7a at the tip engages the hook-shaped engagement portion 6.
It is designed to fit inside b.

Power plate...Figs. 1-3, 10 A power plate 9 is provided below the headlock plate 6 to pull it. This power plate 9 is guided by left and right pins 10, 10 fixed to the board,
It is capable of reciprocating in the same direction as the head lock plate 6, and is biased toward the left side in the figure by the action of the spring 11. When the plunger, which will be described later, is energized and in the suction state, the lock portion of the presser plate that moves in conjunction The engaging portion 9 is connected by 13a.
c is locked and held in the standby position. A pin-shaped pressing projection 9a is fixed to the surface of the power plate 9, and this pressing projection 9a is inserted into the engagement hole of the headlock plate 6. Further, a roller 9b is rotatably provided on the tip (right end) side of the power plate 9, and this roller 9b is attached to the outer periphery of a cam integrally provided on the surface of an intermittent gear 12 that is intermittently rotated by a motor. is in contact with.

As shown in FIG. 10, the intermittent gear 12 has an intermittent portion without gear teeth around it, and does not rotate when the drive gear 12a interlocked with the motor faces the intermittent portion.

A cam 12b is integrally provided on the surface of this intermittent gear 12, and as described above, this cam 12b
The roller 9b of the power plate is in contact with the outer periphery of the power plate. Note that this roller 9b is connected to a spring 11 that urges the power plate 9 to the left.
It is constantly pressed onto the outer periphery of the cam 12b with a force of . The shape of the cam 12b is such that the roller 9b in contact with its outer periphery has a stop part A where the drive gear and the intermittent gear are separated, a lead-in part that goes from the stop part to the smallest diameter part, a small diameter part closest to the center of the cam, and a stop part A where the driving gear and the intermittent gear are separated. It is set to move in the order of the large diameter part farthest from the center and the original stop part A. When the presser plate is in a locked state due to suction of the plunger, the power plate 9 is held at the standby position, and the roller 9b is positioned between the intermediate stop portions A and A', is also set to face the drive gear. Therefore, when the plunger is de-energized, the lock portion 13a of the presser plate 13
is unlocked, the power plate 9 moves to the left by the action of the spring 11, and the roller 9b pushes the stop part A, which is an inclined surface, to rotate the intermittent gear in the direction of meshing with the drive gear 12a.

Means for maintaining the engaged state of the head plate and the power plate...Figs. 1 to 3, and 11 The press plate 13F on the fast-forward side and the press plate 13R on the rewind side are located above the head plate 6 and the power plate 9. and are supported rotatably around their respective axes. Each presser plate 13
F, 13R has three arms centered around the shaft, and these three arms are arranged symmetrically with the center of the tape player in between.

First, the arm protruding downward in the figure serves as an engaging portion between the plunger on the fast forward/rewind side and the rewind side. As shown in the side view of FIG. 10, the tip of this engaging portion engages with the tip of a link 14 that is rotatably attached to the side plate of the tape player about an axis. The core 14a is integrally attached to the core 14a.
are opposed to the suction plungers 15F and 15R on the fast-forward and rewind sides. Spring 16 is provided between these links 14 and the side plate of the tape player to pull the link 14 toward the suction plunger, and the force of the spring 16 causes the presser plate 13F on the fast-forward side (left side) to move clockwise. The presser plate 13R on the rewinding side (right side) is biased counterclockwise.

A lock portion 1 that engages with the power plate 9 is provided at the portion of the presser plate 13R on the rewinding side that engages with the plunger as one of the lock means for locking the drive means at the stop position.
3a is provided. This lock part 13a
, the presser plate 13R is the plunger 15
When it is attracted to R, it engages with the power plate, prevents the power plate from retreating to the left in the figure by the force of the pull-in spring 11, and connects the intermittent part of the intermittent gear 12 to the drive gear 12a.
It should be placed opposite to.

The tip of the second arm protruding toward the center of the tape player serves as a presser portion that comes into slidable contact with the upper edge of the headlock plate 6. These holding parts are connected to the plunger adsorption spring 16 which urges each holding plate 13F, 13R in the rotational direction.
It is always urged toward the headlock plate 6 by the force of .

The third arm of each presser plate 13F, 13R serves as an operating section for fast forward/rewind control plates 17F, 17R, which will be described below.

Locking means for the power plate separated from the head plate...Figures 1 to 3 The fast forward control plate 17F and the rewind control plate 17R are rotated relative to the pins 2' and 2' that were guiding the head plate 1. The fast forward control plate 17F is biased clockwise and the rewind control plate 17R is biased counterclockwise by a spring 18 which is movably supported and stretched between it and the base plate of the tape player.

One end of the fast-forward control plate 17F and the rewind control plate 17R serves as an engaging portion with the operating portion provided on each presser plate 13F, 13R, as described above. Furthermore, a lock portion 17a that can be engaged with a protrusion 9c provided on the power plate 9 is provided at that portion of the rewind control plate 17R. This lock part 1
7a, when the head plate is operated with the plunger on the presser plate 13R side in the OFF state, a pin-shaped member 17b, which will be described later, fits into a groove on the fast forward/rewind side of the Y-shaped groove 1a of the head plate, and the rewind control plate is closed. When the rotation of the power plate is restricted, the protrusion 9c of the power plate
The power plate 9 is prevented from moving by coming into contact with the power plate 9, and the roller 9b is prevented from moving toward the center from the large diameter portion of the cam of the intermittent gear, and the roller 9b is brought to a stop position. In this way, the lock portion 17a is attached to the presser plate 13R.
When there is no action of the side plunger, the power plate 9 is instead locked in the standby position.

Head plate position regulating means in play and fast forward/rewind modes...FIGS. 1 to 3 On the other hand, a position regulating member 17b is provided at the upper end of each control plate 17F, 17R in the figure. This position regulating member 1
Reference numerals 7b denote pin-shaped members, each of which is inserted into a Y-shaped position regulating hole 1a provided in the head plate 1. This position regulation hole 1a is
One branch of the Y-shape is a regulation part for play with a long stroke, and the other branch is a regulation part for fast forwarding and rewinding with a short stroke, and electric position regulation is performed as each control plate 17F, 17R rotates. The member 17b enters into one of the branch parts of the position regulating hole 1a and comes into contact with the end thereof, thereby regulating the forward stroke of the head plate 1.

Each control plate 17F, 17R is provided with an idler (not shown) for fast forwarding or rewinding, with the opposite side of the position regulating member 17b as an axis, and these idlers move as each control plate rotates. Fast forwarding or rewinding is performed by meshing with the reel base and flywheel.

Change plate...Figures 12 and 13 The change plate 19 is a T-shaped member extending vertically in the figure, and is attached to be rotatable left and right around a shaft 19a.
It is biased to the central position by the shape spring 19b.

This change plate 19 can be positioned on either the left or right side of the head plate 1.
When the reel moves forward, one of the pinch rollers is pressed against the capstan shaft, and the idler gear on the same side is engaged with the reel base and the drive gear 12a. The change plate 19 is driven by a change gear, which will be described later, via a connecting plate 20 that moves from side to side in the figure.

The change gear 21 has an outer intermittent gear 21a that meshes with the drive gear 12a and has notches at two diametrically opposing locations, and an inner cam 21b that has locking sections at two diametrically opposing locations. By meshing with the drive gear 12a, it is driven by the gear 12a to rotate, and by making a half rotation, the connecting plate 20 is moved from either the left or right side to the other side (therefore, it rotates). A program change is performed by rotating the change plate 19 in the same direction. At this time, the change gear lock plate 22 that engages with the cam 21b locks at the locking part, and the notch of the intermittent gear 21a is connected to the drive gear 12a. It is designed to face the

The change gear lock plate 22 is attached to the shaft 2.
The change gear 21 is rotatably attached to the tape player base centering around 2a, and is designed to lock the change gear 21 when turned clockwise, and release the lock when turned counterclockwise.
A connecting pin 23 is provided at the opposite end of the change gear lock plate 22 from the locking portion, and a position detection link 24, which will be described later, is attached to this connecting pin 23.

Position detection means...Figs. 4 to 9 The position detection link 24 is rotatable around the connecting pin 23, and includes an arm for engaging the head plate 1 extending upward in the figure and a change gear extending to the left in the figure. It consists of an arm for engaging the lock plate 22. At the tip of the upper arm is a locked part 24 that is locked clockwise by the position detection pin 1b of the head plate.
a is formed, and an engagement hole 2 is formed at the tip of the side arm.
4b, into which the engagement pin 22b of the change gear lock plate 22 is inserted. Further, a spring 25 is provided between the connecting pin 23 and the tape player base, and urges the connecting pin 23 downward in the figure (therefore, the change gear lock plate 22 in the locking direction), and furthermore, the position is detected. A spring 26 is also provided between the tip of the upper arm of the link 24 and the engagement pin 22b of the change gear lock plate 22, and biases the two in a direction toward each other. (Therefore, the position detection link 24 is biased counterclockwise.) When the head plate 1 is in the retracted position (upward in the figure), the position detection link 24 is pressed against the position detection pin 1b of the head plate. Therefore, when the head plate 1 is locked clockwise at the locked portion 24a and is in the forward position (lower in the figure), the position detection pin 1b of the head plate is located in the relief part between both arms of the position detection link 24. When inserted, the lock of the position detection link 24 is released, and the link 24 is rotated counterclockwise by the biasing force of the spring 26, so that the link 24 engages with the change gear lock plate inserted into the engagement hole 24b. Matching pin 2
2b engages with the clockwise end within the engagement hole 24b.

Furthermore, a protrusion 24c for engaging with the power plate 9 is provided on the side arm of the position detection link 24, so that when the link 24 is located in the counterclockwise direction (therefore, when the head plate 1 is in the play position) It is designed to engage with an engaging pin 27 provided at the end of the power plate 9 only when the power plate 9 is closed. In this case, when the power plate 9 moves back and forth (rightward in the figure), the position detection link 24 is pressed counterclockwise, so that the shaft of the change gear lock plate 22 engaged with the link 24 is 22a as a center, both rotate counterclockwise as a unit (thus, the lock of the change gear 21 is released), and when the power plate 9 returns (to the left in the figure), the position detection link 24 By being pressed clockwise, the engagement pin 22b in the engagement hole 24b of the link 24 can move within the engagement hole.
Only the link 24 rotates.

(2) Effects of the embodiment Stop mode...Fig. 1, Fig. 4 In the stop mode, the power to the motor and two plungers is cut off, so the presser plate 13 of both fast forward and rewind
F, 13R is in a free state. The head plate 1 is also retracted to the upper stop position in the figure by the force of the stop spring 5 which urges it to the retracted position via the link 3. Therefore, the position control members 17b provided on the fast-forward control plate 17F and the rewind control plate 17R are located at the bases of the Y-shaped position regulation holes 1a provided on the left and right sides of the head plate 1. Both fast forward and rewind control plates are pivoted outwardly of the head plate 1 against the force of the spring 18.

Further, in the power plate 9, the rewind side presser plate 13R that locks the power plate 9 is in a free state, and the rewind control plate 17 is in a free state.
Since the lock portion 17a provided at the base of R is separated from the protrusion 9c of the power plate 9, it is in a free state. Therefore, the power plate 9 is pulled to the left in the figure by the force of the drawing spring 11, and the roller 9b is located at the small diameter part of the intermittent gear cam 12b, and the teeth of the intermittent gear 12 are in mesh with the drive gear. has stopped at the starting position.

On the other hand, the chain gear 21
It is locked by a change gear lock plate 22 at one of the locking portions b, and the change plate 19 is held on the right side via a connecting plate 20. Further, the position detection link 24 is locked clockwise by the position detection pin of the head plate 1, and the change gear lock plate 2 in the engagement hole 24b is locked clockwise by the position detection pin of the head plate 1.
The second engagement pin 22b is located on the counterclockwise side.

Note that since the head plate 1 is in the retracted position, the drive system (not shown) (pinch roller, capstan shaft, reel base) is in an open state.

At the start of play...Figures 2 and 5 When the motor is powered on and a play command is applied to the tape player, both plungers are turned on. At this time, since the presser plate 13F on the fast-forwarding side can rotate without any restriction, the link 14 interlocked with it also rotates, and its core is attracted to the suction plunger 15F. However, the holding plate 13R on the rewinding side is unable to rotate because its lock portion 13a is pressed by the power plate 9, which is moving to the left in the figure.
It cannot be attracted to the plunger 15R. Therefore, the headlock plate 6 is held down only by the holding part at the tip of the fast-forward side holding plate 13F, and is restricted from rotating upward in the figure.

In this state, due to the drive of the motor, the intermittent gear 12, which had stopped while being engaged with the drive gear 12a at the time of stop, rotates, and the cam 12
When b rotates, the roller 9b is pressed from the small diameter part to the large diameter part of the cam 12b, so the power plate 9, which moves together with the roller 9b, moves to the right in the figure.

As the power plate 9 moves, its pressing protrusion 9a comes into contact with the tapered engagement portion 6a of the headlock plate 6 and pulls the headlock plate 6 to the right. At this time, since the headlock plate 6 is pressed down from above by the fast-forward side presser plate 13F, the engaging portion 6a moves to the right without escaping.

Due to this movement of the power plate 9, the presser plate 13R on the rewinding side, which had been pressed by the power plate 9 until now, becomes free.
It is fixed to the plunger 15R by suction. Then, the headlock plate 6 is held down by both holding plates 13F and 13R.

As the head plate 6 moves in this manner, the head plate 1 connected thereto via the link 3 moves forward.

On the other hand, at this stage when the head plate 1 is still moving forward, the position detection link 2
4 is locked clockwise by the position detection pin 1b of the head plate 1, so when the power plate 9 moves back and forth, the engagement pin 2
7 never engages with the position detection link 24. Therefore, the link 24 and the change gear lock plate 22 are held in the same position as when stopped, and the positions of the change gear 21, the connecting plate 20, and the change plate 19 are also not changed without the change gear 21 being unlocked. do not have.

In addition, when starting play from key-off,
After turning on both plungers, the plunger on the rewinding side is turned off momentarily to unlock the power plate 9, engage the intermittent gear with the drive gear again, and move the power plate forward to the right again. in,
The same effect as the play from the normal stop state described above is made.

Also, turn off the plunger on the rewind side,
When the holding plate 13R becomes free, the power plate 9 moves to the left by the action of the spring 11, and the roller 9b provided on the power plate presses the intermittent gear 12 while sliding down the drawing part of the cam 12b.
The intermittent gear rotates and meshes with the drive gear, and is then rotated by the force of the drive gear, driving the power plate together with the link 3 and the head plate 1 to the right.

Play state...Figs. 3 and 6 As described above, the head plate 6 moves to the right and the head plate 1 starts moving forward. At this time, since both presser plates are attracted to their respective plungers, the fast-forward control plate 17F and the rewind control plate 17R are pressed against the operation section by each presser plate, and are pressed against the force of the spring 18. The position regulating member 17b is rotated to the outside. Therefore, when the head plate 1 moves forward, the position regulating member 17b
The head plate 1 enters the play regulating portion (branch on the outside of the head plate) of the letter-shaped position regulating hole 1a, allowing the head plate 1 to move greatly forward to the play position.

The headlock plate 6, which moves forward together with the headplate 1, has a hook-like engagement portion 6b at its tip that presses the engagement member 7a of the lock plate 7, causing the entire lock plate 7 to move against its spring 8, causing the lock plate 6 to move forward. direction. When the headlock plate 6 moves further and its hook-like engaging portion 6b overcomes the engaging member 7a,
The lock plate 7 is rotated in the original direction by the force of the spring 8 and engages inside the hook-like engaging portion 6b, thereby preventing the head lock plate 6 from returning to its original left side. As a result, the head plate 1, which is interlocked with the head lock plate 6, is also fixed in the forward position.

On the other hand, after the head plate 6 is fixed at the forward position of the head plate 1, the power plate 9, which has been pulling it until now,
Since the roller 9b passes over the large diameter portion of the cam 12b, it moves to the left side of its original position, and the pressing protrusion 9a also separates from the engaging portion 6a of the headlock plate 6. Then, the intermittent gear rotates further, and the intermittent part becomes the drive gear 1.
2a, the power plate 9 is locked by the rewind side presser plate 13R which is in an adsorbed state, so the driving force from the drive gear is no longer transmitted and the power plate 9 stops at that position. do.

Furthermore, when the head plate 1 completes its forward movement, the position detection pin 1b thereon enters the escape part of the position detection link 24, so the position detection link 24 is rotated counterclockwise by the biasing force of the spring 26. . Therefore, when the power plate 9 returns to the left, its engagement pin 27 engages with the engagement protrusion of the position detection link 24, causing the link 24 to rotate clockwise. At this time, the engagement pin 22b of the change gear lock plate 22 is connected to the position detection link 2.
4, the plate 22 does not move and the change gear 21 is not unlocked.
Then, when the engagement protrusion 24c gets over the engagement pin 27, the position detection link 24 returns counterclockwise again due to the biasing force of the spring 26.

In the play mode, the operation of pressing the pinch roller to the capstan shaft and connecting the drive idler to the reel base are performed using a control member formed on a part of the head plate as the head plate moves forward. .
Regarding this point, various mechanisms have been proposed for conventional tape players, and since they can be used as appropriate in the present invention, their explanation will be omitted.

Program change mode...Figures 7 to 9, 12, and 13 To execute a program change from play mode, momentarily turn off plunger 17R on the rewind side of the plungers that are both turned on. shall be. Then, this plunger 17
The power plate 9, which had been locked by the lock portion 17a of R, moves to the left by the force of the pull-in spring 11, and the intermittent gear interlocked with this rotates while meshing with the drive gear. The power plate 9 then reciprocates. The reciprocating movement of the power plate operates the program change mechanism for the next purpose.

That is, in the play mode, as described above, since the position detection link 24 is located in the counterclockwise direction, the reciprocating movement of the power plate 9 causes the engagement pin 27 to engage with the engagement protrusion 24c. It's getting old. First, when the power plate 9 moves back and forth, the position detection link 24 is pressed counterclockwise, so that the two are integrated around the shaft 22a of the change gear lock plate 22 that is engaged with the link 24. Then, it rotates counterclockwise, and the change gear 21 is unlocked. As a result, the change gear 21 meshes with the drive gear 12a, rotates, and moves the change plate 19 located on the right side to the left side via the connection plate 20.

At this time, the chain gear 21 is called in as follows.
This is done by the biasing force of the V-shaped spring 19b that biases the change plate 19 to the central position. That is, the change plate 19 is biased to the center position, so that it moves slightly,
Along with this, the connection plate 20 similarly moves, and the power plate 9 that rotates the chain gear 21 further moves, and the engagement pin 27 moves into the engagement protrusion 2 of the position detection link 24.
After overcoming 4c, the link 24 returns again and the chain gear lock plate 22 also tries to return in the same direction, but at this time the chain gear 21 is rotating, so it slides on the cam. Become. Then, when the power plate 9 completes its forward movement, the change plate 19 completes its movement to the left, and the change gear 21 that has rotated half a rotation is locked by the change gear lock plate 22 again.

After that, when the power plate 9 returns to its original position, the power plate 9 is locked by the plunger 17R on the rewinding side which is turned on again, so the play mode is resumed after the program change operation is completed. can be retained.

Fast Forward Mode In the tape player of the present invention, in order to enter the fast forward mode, whatever state the tape player is in, the tape player is first set to the stop mode and then switched to the fast forward mode.

That is, to set the fast forward mode, the motor is driven when the power is turned on, and at the same time, the plunger 15F on the fast forward side is turned off and the plunger 15R on the rewind side is turned on.

Then, the presser plate 13F on the fast-forward side becomes free, and its operating section no longer presses the fast-forward control plate 17F, so the fast-forward control plate 17F rotates clockwise by the force of the spring 18, regulating the position of its tip. The member 17 enters into the short stroke inner branch of the Y-shaped position regulating hole 1a of the head plate 1. The force of this spring 18 is stronger than the force of the plunger suction spring 16, so unless the plunger is suctioned,
The control plate can be pivoted inward.

On the other hand, the rewind side presser plate 13R attracted by the plunger presses the rewind control plate 17R against the spring 18, so that the rewind control plate 17R
It is in the same position as when playing. Then, the headlock plate 6 is locked by the unwinding side holding plate 13R so that it does not escape upward, and when the power plate 9 is moved by the intermittent gear 12 rotated by the drive of the motor, the headlock plate 6 and Head plate 1 moves forward via link 3.

The forward motion of the head plate 1 and the locking motion after the advance is completed are the same as those during play, but the forward stroke is controlled by the position regulating member 17b of the fast-forward control plate 17F.
Because it enters the short branch of the stroke of the position regulation hole 1a of the head plate 1, it cannot advance to the playing position, but it advances to the position where the head on the head plate 1 lightly contacts the tape in the cassette. It stops. At this time,
The movement stroke of the power plate on the drive mechanism side is the same as the movement stroke during play, but since the head plate 1 is regulated by the position regulating means, its forward stroke is shorter than the stroke of the drive mechanism. Therefore, in this embodiment, the head plate 1
and the link 3 are connected by a spring 4, and the displacement of the two is absorbed by the spring 4.

Further, if the head plate 1 does not move completely forward, a control member provided therein is set so that the pinch roller and the idler for driving the reel base do not enter the play state.

On the other hand, when the fast-feeding control plate 17F is rotated inside the head plate 1 by the spring 18, a fast-feeding idler (not shown) provided there engages with, for example, a gear on the outer periphery of the flywheel and a gear on the outer periphery of the reel base. Therefore, the reel base can rotate at high speed, and the tape player enters the fast forward mode.

In addition, in the case of fast-forward mode from key-off, similarly to play from key-off, turn off the plunger on the rewind side that was once turned on, release the lock on the power plate, and drive the power plate again to lock the head. Advance the plate.

Rewind Mode In the rewind mode, contrary to the fast forward mode, the plunger on the rewind side is turned off and the plunger on the fast forward side is turned on.

Then, the head plate 6 is held down by the presser plate 13F on the fast-forward side, so that the driving force of the power plate 9 advances the head plate 1 via the link 3.

Further, the forward stroke of the head plate 1 is controlled by rotating the rewind control plate 17R, which is no longer pressed by the presser plate 13R, by the force of the spring 18, and its position regulating member 17b regulates the position of the head plate 1. This is done by entering the short branch of the stroke of the hole 1a. Furthermore, control of the pinch roller, play idler, and rewind idler is also performed by the forward stroke of the head plate 1 and the rotation of the rewind control plate, as in the fast forward mode.

By the way, the important point in this rewind mode is that in other modes, the head plate 1
When the power plate 9 that has been advanced reaches the stop position (the position where the intermittent part of the intermittent gear faces the drive gear), the power plate is engaged with the lock part of the presser plate 13R on the rewinding side fixed by the plunger. However, in the unwinding mode in which the presser plate on the unwinding side is in a free state, it becomes impossible to stop the power plate as it is.

Therefore, in the present invention, the spring 1
By engaging the lock portion 17a provided on the rewind control plate 17R, which has been rotated to the rewind side with a force of 8, with the protrusion 9c of the power plate 9,
After pulling the headlock plate 6, the power plate 9, which has returned toward the left side, is locked at the stop position.

Stop mode...Figure 1, Figure 4 From play or fast forward/rewind mode,
To enter stop mode, power to both plungers and motors is cut off.

Then, one or both of the presser plates on the fast-forwarding side and the rewinding side, which were fixed by the plunger, become free and cannot press the headlock plate 6. Together with the interlocking head plate 1, it is moved backward by the force of its stop spring 5. At this time, the headlock plate 6 rotates upward in the figure as its tapered engagement portion 6a slides along the pressing protrusion 9a of the power plate 9, so that the hook-shaped engagement portion 6b at the tip thereof rotates upward in the figure.
is removed from the roller-like engaging member 7a of the lock plate 7. Further, as the head plate 1 retreats, the position detection link 24 rotates clockwise, but the change gear and the change plate are held in the same position.

Similarly, during play and fast forwarding, the rewind side presser plate 13R is in a free state and its lock portion 13b is removed from the power plate 9, and during rewind, the rewind side presser plate 13R is in a free state and its lock portion 13b is removed from the power plate 9. When the return control plate 17R rotates clockwise in the figure, its lock portion 17a is disengaged from the protrusion 9c of the power plate. As a result, the power plate 9 also becomes free, and the spring 11
is pulled to the left by the force of the roller 9.
b presses the cam 12b, so the intermittent gear 1
2 rotates, the position of the intermittent part shifts, and the surrounding gears mesh with the drive gear.

The transition to this stop mode is caused by a normal stop command, but the same effect can be obtained by turning off the power (key off) from play or fast forward/rewind mode. however,
If the power is cut off during the transition to each of the modes mentioned above, the head plate will completely retreat, but the meshing position of the related gears and the drive gear and the moving position of the power plate will change during the operation, unlike in the normal stop mode. It will stop.

[Other Embodiments] As described above, the fast forward/rewind mechanism of the present invention has the following features:
The first plunger engages each member with the power plate when switching each mode, and locks each member while the mode continues, and the second plunger engages the power plate with the power plate separated from each member. The power plate is locked in a position separated from the drive gear, and the second plunger, which is turned on in the play mode, is turned off to unlock the power plate, and the power plate is connected to the drive gear and moved. However, the structure thereof is not limited to the illustrated embodiment.

For example, it is also possible to reverse the roles of the first and second plungers on the fast forward side and the rewind side.
Further, an engaging means between the head plate and the power plate, a means for maintaining the engaged state of the head plate and the power plate by the engaging means, and a head plate which is moved forward and separated from the power plate are held in that position. Holding means for locking, means for regulating the forward position of the head plate whose forward strokes differ between play and fast forward/rewind, means for connecting the change plate and change gear, and further controlled by the head plate and control plate in the above embodiment. The specific configuration of each idler, pinch roller, etc. can be changed as appropriate.

[Effects of the Invention] As described above, according to the program change control device of the present invention, it is possible to lock the power plate separated from the head plate by one plunger at the position separated from the motor. Therefore, even if the plunger is turned off and the fast forward or rewind mode is executed, the power plate can be locked. As a result, in a tape player in which each member in the fast forward/rewind mechanism is held by a dedicated plunger, and each member is held in play mode by two plungers, one of the two plungers can be turned off in play mode. Since the lock of the power plate can be released as a single plunger, the power plate can be moved and a program change can be executed while each member is held with the other plunger, making this tape player capable of controlling all modes with two plungers. It is effective in providing the following.

[Brief explanation of drawings]

1 to 9 are plan views showing one embodiment of the program change control device for a tape player according to the present invention, and FIGS. 1 to 3 show the head during transition to stop mode, play mode, and play mode, respectively. FIGS. 4 to 9 show the state of engagement between the plate and the power plate, and FIGS. 4 to 9 show the position detection mechanism during transition to stop mode, play mode, play mode, start of program change, midway through program change, and completion of program change, respectively. Fig. 10 is a plan view of the power plate portion in the above embodiment, Fig. 11 is a side view of the suction plunger portion, and Figs. 12 and 13 show the program change mechanism in the left and right fixed positions, respectively. FIG. 1...Head plate, 1a...Position regulation hole,
1b...position detection pin, 3...link, 4...displacement absorption spring, 5...stop spring, 6...headlock plate, 6a...engaging portion with power plate, 6b...lock plate Engagement part with 7... Lock plate, 9... Power plate,
9a...Headlock plate pressing protrusion, 9b
...Roller, 12...Intermittent gear, 12a...Drive gear, 12b...Cam, 13F...Fast-forward side presser plate, 13R...Rewind side presser plate, 1
3a...Lock part with power plate, 15F...
...Fast forward side plunger, 15R...Rewind side plunger, 17F...Fast forward control plate, 17R
... Rewinding control plate, 17a ... Lock part with power plate, 17b ... Position regulating member, 1
9...Change plate, 20...Connection plate, 21...Change gear, 22...Change gear lock plate, 22b...Engagement pin, 23...
...Connection pin, 24...Position detection link, 24a...
...Locking portion, 24b...Engagement hole, 24c...Engagement protrusion, 25, 26...Spring, 27...Engagement pin of power plate.

Claims (1)

[Claims] 1. An intermittent gear that is intermittently rotated by a drive gear;
A tape player is equipped with a power plate that reciprocates by the action of a cam provided on the intermittent gear, and the movement of the power plate advances the head plate to a play position or a fast forward/rewind position. An engaging means is provided between the two, and the retaining means for the engaged state of the engaging means and the retaining means for the advanced head plate are connected to the first and second plungers in the play mode. In the play mode, the power plate is held by one of the plungers in the fast forward or rewind mode, and locks the power plate, which is separated from the head plate after the head plate moves forward, in a position away from the drive gear. And in either fast forward or rewind mode,
The power plate is locked by said second plunger, and in the other mode of fast forward/rewind, the power plate is locked by a fast forward or rewind control plate which is unlocked by said second plunger. When the power plate is unlocked and connected to the drive gear by turning off the second plunger, which is turned on in the play mode, the drive of the program change mechanism is changed to the program change mechanism by its movement. The change mechanism is configured to move, and a head plate position detection mechanism is provided between the power plate and the program change mechanism.
A program change control device for a tape player, characterized in that the position detection mechanism causes the power plate and the program change mechanism to engage only when the head plate is in the play position. 2. The position detection mechanism of the head plate includes a lock plate for locking the change gear that engages with the drive gear to perform a channel change, a position detection pin provided on the head plate, and a position detection link that connects the power plate and the lock plate. When the head plate is in the retracted position, the position detecting pin holds the position detecting link in a free state with respect to the power plate and the lock plate, and when the head plate is in the play position,
The position detection link and the position detection pin are disengaged, and the position detection link can be engaged with the lock plate and the power plate, and the movement of the power plate causes the lock plate to move and unlock the change gear. A program change control device for a tape player according to claim 1. 3 The engagement means between the head plate and the power plate connects the head plate, which is always biased in the backward direction by the stop spring, to the head lock plate that interlocks with the head plate, and The program change control device for a tape player according to claim 1, wherein the head plate is engaged with a power plate that pulls the head plate in the forward direction. 4 The means for holding the head plate and the power plate in the engaged state causes the two suction plungers to interlock the presser plates, and when at least one of these presser plates is turned on, the head plate and the power plate are engaged with each other. A program change control device for a tape player according to claim 1, wherein the program change control device for a tape player ensures a matching state. .