JPH048509Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a loading eject mechanism for a tape player, and in particular, uses a spring whose biasing direction is reversed and a drive mechanism to move a cassette to an eject position. It pertains to things that are sucked and discharged between and the operating position.

[Technical background of the invention] In a tape player, a loading/eject mechanism that loads (suctions) and ejects a cassette raises and lowers a pack guide that houses a cassette, and a guide arm that supports this pack guide. By moving the pack stopper provided on the top back and forth, the cassette housed in the pack guide is moved to an eject position on the front side and an operating position on the back side.

In this mechanism, a pack stopper that moves together with the cassette is attached to the front end of an eject arm that rotates back and forth under the action of a drive mechanism.
The back and forth rotation of the eject arm causes the pack stopper to move back and forth in parallel.

An eject spring is attached to this eject arm to urge it toward the front side (toward the cassette ejection side). When ejecting, the eject arm is first driven by the drive mechanism to move toward the ejection side, and when it reaches a predetermined position, it is separated from the drive mechanism, and then the cassette is pushed to the eject position by the bias of the spring. It's becoming like that. Furthermore, during loading, the eject arm advances toward the back as the cassette is pushed from the eject position against the spring to the aforementioned predetermined position, and from this point it is driven by the drive mechanism. It is sucked in.

By the way, in this loading eject mechanism, when lowering the cassette to its operating position, if the backward movement does not reach the specified stroke, the cassette may ride on the capstan shaft, guide pin, reel base, etc. , it becomes impossible to install the cassette. Therefore, in the conventional loading eject mechanism, the amount of rotation of the eject arm, that is, the amount of movement of the pack stopper and the cassette that interlocks with it, is regulated by the position of the end of the guide hole provided in the guide pin. , the drive mechanism that rotates the eject arm has an overstroke, and by operating the drive mechanism further after the eject arm reaches the specified position, the amount of rotation of the eject arm can be adjusted. I made sure there was no shortage.

[Problems with Background Art] However, the conventional loading eject mechanism as described above has the following drawbacks.

That is, in the conventional loading eject mechanism, the amount of overstroke given to the drive stroke of the drive mechanism needs to be large to some extent in order to ensure the accuracy of the mechanism. On the other hand, since the cassette stops at a specified operating position, the only way to absorb the displacement between the drive mechanism that has an overstroke and the eject arm that has stopped at the specified position is to use an elastic mechanism such as a spring between the two. An appropriate section is provided to absorb overstroke. However, this elastic part normally moves the drive mechanism and eject arm together and absorbs displacement only during overstroke, so it is a strong elastic part that does not produce an elastic effect until a certain force is applied. something is needed.
Therefore, during overstroke, a fairly large load is applied to the drive mechanism, which reduces the durability of the mechanism.

Furthermore, even if the drive mechanism is provided with an overstroke, the drive stroke must cover almost the entire rotation amount of the eject arm, and increasing the amount of overstroke more than necessary is important for downsizing the equipment and Since this is not preferable from the point of view of saving power in the drive system, considerable accuracy is required for the stroke amount. However, in order to ensure the precision of the mechanism, each component that makes up the mechanism requires considerable processing precision, which is technically difficult and has been a problem.

Furthermore, as mentioned above, the spring that urges the eject arm to the eject position is always acting in the ejecting direction, and as the cassette is drawn toward the back of the tape player by the drive mechanism, the spring is compressed. As the amount increases, the load placed on the drive mechanism also increases, so there is also the problem that the drive mechanism is required to have a large capacity to overcome the load when the spring is fully compressed.

[Purpose of the invention] The present invention was proposed in view of the shortcomings of the prior art as described above, and its purpose is to make it possible to suction the cassette to a specified position without overstroke of the drive mechanism. By eliminating the extra load of the ejecting spring, we provide a loading eject mechanism that does not require high-precision machining of each member, and also achieves a smaller, labor-saving drive mechanism and improved durability. It's about doing.

[Summary of the invention] The loading eject mechanism according to the invention is
As a spring for suction and ejection of the cassette, the direction of force is reversed during the rotation of the eject arm, and when the eject arm is in the operating position of the tape player, the spring is applied in the direction that presses it to the same position. and when it is at the eject position side, it shall be biased in the direction of pressing it to the same position,
In addition, the eject arm is separated from the drive mechanism on both sides of its movement stroke.

With this configuration, the cassette is positioned at the suction/ejection position using the biasing force of a single spring in both directions, and the drive mechanism has the ability to simply reverse the suction/ejection spring. The device is designed to be small and have low precision.

[Embodiment of the invention] An embodiment of the loading eject mechanism according to the invention as described above will be described with reference to the drawings.

In FIG. 1, an eject arm 1 for suctioning and ejecting a cassette is attached to a shaft 1a provided in the frame of the tape player so that its tip can rotate back and forth. A pack guide 2 for mounting a cassette is supported at the tip of a guide arm 3 that rotates up and down about a shaft provided at the rear of the tape player. Guide 2
is designed to rise and fall up and down. The guide arm 3 is provided with a guide hole 3a that extends back and forth, and the eject arm 1 is inserted into a pack stopper 3b that is slidably fitted into the guide hole 3a.
The tip is attached so that it can move back and forth.

At the tip of the eject arm 1, one end of a torsion spring 4 constituting the suction/discharge spring of the present invention is attached. This torsion spring 4 is arranged with its center ring portion 4a projecting forward, and the other end is attached to the pack guide 2. The attachment point of the other end of the torsion spring 4 is on the extension line of the eject arm 1 when it rotates to the central position during suction or ejection of the cassette.
Therefore, the torsion spring 4 configured in this way moves the eject arm 1 forward when it is in front of the center position, and moves it forward when the eject arm 1 is in the rear of the center position. It urges the body backward.

The mechanism of this embodiment having such a configuration operates as follows.

First, before suctioning (loading) the cassette, the tip of the eject arm 1 is in the guide hole 3a.
Since it is located at the front end of the torsion spring 4
The eject arm 1 is also rotated toward the front, and the spring 4 urges the eject arm 1 toward the front. When the cassette is pushed into the pack guide 2 in this state, the tip of the cassette will be pushed into the pack stopper 3 of the guide arm 3.
b is pressed along the guide hole 3a, the pack stopper 3b and the distal end of the eject arm 1 interlocked therewith move toward the inner side against the torsion spring 4. This movement is initially performed by manual operation by pushing in the cassette, but after that, a drive mechanism (not shown) detects the cassette and operates, and its force moves the eject arm 1 and the cassette into the pack guide 2. Suction to the inner part.

During this suction, when the eject arm 1 reaches the center position of its rotation, as shown in Fig. 2,
The front-to-back relationship between both ends of the torsion spring 4 is reversed, the urging direction is reversed, and the eject arm 1 is pressed toward the inner part. After the torsion spring 4 is reversed in this way, the eject arm 1 is disconnected from the drive mechanism (not shown),
The eject arm 1 is sucked toward the inner part by the force of the torsion spring 4. When the pack stopper 3b pressed by the eject arm 1 reaches the inner end of the guide hole 3a, the eject arm 1 stops rotating, and the cassette is positioned in conjunction with this. In this case, the drive mechanism only needs to drive the eject arm 1 until the torsion spring 4 overcomes its inverted position. There is no need to further aspirate the overstroke.

Therefore, it is no longer necessary to accurately set the stroke of the drive mechanism to match the stroke of the eject arm 1, and even if there is some play or backlash in the drive mechanism itself or in the connection between the drive mechanism and the eject arm, Since the cassette can be positioned accurately, there is no need to increase the processing accuracy of each member. In addition, since the torsion spring applies force in the direction of movement of the eject arm 1 after being reversed midway, the load does not increase as the cassette approaches the suction position, unlike conventional eject springs. Since the load on the drive mechanism and each member is reduced, it is possible to save labor on the drive mechanism and improve the durability of each member.On the other hand, when ejecting, contrary to the above, the drive force of the drive mechanism causes the eject arm 1 to rotates in the ejection direction against the biasing force of the torsion spring 4, and after the spring has passed the reversal position,
The connection between the eject arm and the drive mechanism is released,
Eject arm 1 has torsion spring 4
It rotates toward you due to the biasing force of. Since the pack stopper 3b that interlocks with the cassette is pressed against the front end of the guide hole 3a by the biasing force of the torsion spring 4, the cassette can be accurately positioned even if the drive mechanism does not move the cassette forward stroke. will be done.

Next, an example of a drive mechanism for driving the loading eject mechanism of the present invention as described above will be explained with reference to FIG. 4 and subsequent drawings.

This drive mechanism rotates the eject arm using two eject plates, one for suction and ejection of cassettes and one for raising and lowering the cassette. The eject plate moves back and forth by engaging an intermittent gear that interlocks with the gear, and input to the motor that drives the drive gear is performed by a slide plate superimposed on the two eject plates. It is.

That is, the drive gear 10 rotates clockwise in the figure during ejection in conjunction with the motor, and vice versa during loading.
Large gear portion 11 of connecting gear 11 consisting of a and 11b
It meshes with a. The connecting gear 11 has an intermittent gear 12 having an intermittent portion in its small gear portion 11b.
The small gear portion 12a of this intermittent gear meshes with each rack of the eject plate 13 for suction and discharge and the eject plate for elevating and lowering (not shown) superimposed below it.

The suction/ejection ejection plate 13 has the aforementioned racks 13a on its side edges and two on its front and rear ends.
A locking portion 13c is provided at the end of the slide hole 13b on the inner side. The length of the rack 13a is equal to the sum of the movement stroke for suction and discharge and the movement stroke for raising and lowering, and as described above, it meshes with the small gear part 12a of the intermittent gear.
On this eject plate 13,
Slide plates 14 are provided one on top of the other, and both plates are urged by a spring 14a to a position where they overlap each other. Further, the tip of the slide plate 14 is connected to the eject plate 13 for suction and discharge.
It comes into contact with a locking part 13c provided at the end of the plate 13, and cannot move further than the plate 13.

In addition to a roller 14b that engages with a cam provided at the base of the eject arm, the slide plate 14 has two slide holes 14c at the same position as the suction/ejection eject plate 13, and further has a slide hole 14c at the front end. is the input protrusion 1 of the motor starting switch 16
It is equipped with 4d.

That is, a hole-shaped cam 7 consisting of a pressing part 7a and a relief part 7b is formed at the base of the eject arm 1, and a slide plate 14 is inserted into this cam 7.
roller 14b is inserted and engaged. This cam 7
The shape of is such that when the roller 14b is at the pressing part 7a, the eject arm 1 rotates back and forth in conjunction with the back and forth movement of the slide plate 14, and the roller 14b
When it is in the relief portion 7b, the two members are disengaged from each other.

Each slide hole 13b, 1 provided in the suction/discharge eject plate 13 and the slide plate 14
A pin 15 provided on a lift eject plate (not shown) is inserted into the pin 4c by penetrating the two plates. As a result, when the two upper plates 13 and 14 are further back than the predetermined position (the position where the eject arm has rotated until the cassette reaches the back of the pack guide), the lower eject plate for elevating It is said that it can be slid freely against
When moved forward to a predetermined position, the rear edges of the slide holes 13b, 14c that engage with the pins 15 press the eject plate for elevating and lowering toward the front.

The eject plate for elevating and lowering is connected to the guide arm 3 via a tapered cam, etc., and its back and forth movement causes the guide arm 3 to rotate up and down about the axis at the back, and the guide arm 3
This is for raising and lowering the pack guide 2 at the tip.

The operation of the drive mechanism of this embodiment as described above is as follows.
It is as follows.

During loading In the state before loading, the small gear 11b of the connecting gear 11 is connected to the intermittent gear 12
The small gear part 12a of the intermittent gear 12 is engaged with one end of the eject plate 13 for suction and discharge.
It engages with the tip of the rack 13a. At this time,
Both the slide plate 14 and the two eject plates are located at the innermost part of the tape player, and the pin 15 is located at the inner end of both slide holes 13b and 14c. Further, the eject arm 1 is rotating toward the front side, and therefore the pack stopper 3b and the torsion spring 4 are also on the front side, and the force of the torsion spring 4 is applied to the eject arm 1.
is biased toward the front.

In this state, when the cassette is inserted and the eject arm 1 is rotated backwards against the biasing force of the torsion spring 4 via the pack stopper 3c, its base end rotates toward you, and this rotation Accordingly, the pressing part 7 of the cam 7 of the eject arm 1
The roller 14b of the slide plate 14 is pressed by a, and the slide plate 14 moves forward. At this time, the slide plate 14 moves independently of the suction/ejection eject plate 13, so the eject arm 1 that interlocks with the slide plate 14 is also separated from the suction/ejection eject plate 13 that constitutes the drive mechanism. move away.

When the slide plate 14 moves forward and its protrusion 14d presses the motor start switch 16, the motor rotates and the drive gear 10 rotates counterclockwise. also rotates counterclockwise, and the suction/discharge eject plate 13, which is engaged with this via the rack 13a, is moved toward the front. As a result, the suction and discharge eject plate 13 and the slide plate 1
4 overlap again, and both plates move as one by the biasing force of the spring 14a. Then, contrary to before the power was turned on, slide plate 1
Eject arm 1 rotates according to the movement of 4,
The cassette is sucked into the back of the pack guide 2 via the pack stopper 3b engaged with the tip thereof.

Eject arm 1 driven by the force of the drive mechanism
When the torsion spring 4 reaches the center position as shown in FIG. 4 is reversed, and the torsion spring 4 presses the eject arm 1 toward the back of the tape player in the opposite direction.

Eject arm 1 is torsion spring 4
When the roller 14b of the slide plate 14 rotates further beyond the inverted position of the cam 7, the roller 14b of the cam 7
The roller 14b and the cam 7 are disengaged from each other.
The eject arm 1 is separated from its drive mechanism. However, due to the force of the inverted torsion spring 4, the eject arm 1 is forced to move the guide hole 3a of the guide arm 3 into the guide hole 3a of the guide arm 3.
is pressed until it touches the inner end of the As a result, the cassette is positioned in conjunction with the pack stopper 3b.

Suction and discharge eject plate 13 and slide plate 14 separated from eject arm 1
means that the intermittent gear 1 continues to mesh with the rack 13a.
Move it forward with the force of 2, and when it reaches the specified position,
Since the inner ends of both slide holes 13b and 14c provided in these press the pin 15, the lower lifting eject arm moves forward a little and meshes with the small gear part 12a of the intermittent gear 12. Thereafter, the lifting eject plate 13 is also moved forward by the force of the intermittent gear 12, and the guide arm 3 is rotated downward by the action of the taper cam provided on the lifting eject plate to store the cassette. Pack guide 2
lower to the tape playback position.

In addition, when the pack guide 2 has completed its descent, as shown in FIG. 6, the intermittent portion of the intermittent gear 12 faces the rack of each plate, so that the driving force from the drive gear is not transmitted to each plate. Become.

When ejecting When ejecting, the motor reverses in response to the command, and the drive gear 10 rotates clockwise. Then, the connecting gear 11 that meshes with the drive gear rotates around the drive gear due to its rotational force, and meshes with the small gear 12a of the intermittent gear 12, causing the intermittent gear 12 to rotate clockwise. As a result, the three plates begin to move toward the back, and the guide arm 3 and pack guide 2 rise due to the action of the tapered cam of the lifting ejector. At this time, since the slide plate cannot move because it is obstructed by the eject arm which is in a stopped state, only the eject plate moves while stretching the spring 14a.

When the guide arm 3 rises, the eject plate for elevating and lowering, which has a short rack distance, moves to the intermittent gear 12.
The suction/ejection eject plate 13 and slide plate 14 alone are moved to the back by the driving force of the intermittent gear. This slide plate 14
, the roller 14b reaches the pressing part 7a from the relief part 7b of the cam 7, and presses the base of the eject plate 1, which has been separated from the drive mechanism, inward, so that its tip becomes a toe. It rotates toward you against the biasing force of the spring spring 4.

In this way, when the eject plate 1 is driven by the drive mechanism and rotated to the intermediate position,
Since the end of the torsion spring 4 on the eject plate side is located in front of the end on the guide arm side, the biasing direction of the torsion spring 4 is reversed and the eject plate 1 is pressed forward.

Then, the eject plate 1 rapidly rotates toward the front side together with the slide plate 14 by the force of the torsion spring 4. As a result, the pack stopper 3 interlocks with the tip of the eject arm 1.
b comes into contact with the front end of the guide hole 3a, so
The cassette moving with the pack guide is ejected from the tape player. At this time, the driving force is disconnected (absorption of displacement) between the rapidly rotating eject arm 1 and the eject plate that moves slowly by the intermittent gear. Spring 14
This is done by rapidly shrinking a and causing both plates to overlap.

On the other hand, the drive mechanism ultimately consists of an intermittent gear 12
meshes with the connecting gear 11 at its end, and when the suction/discharge eject plate 13 and the slide plate 14 return to their pre-loading positions as shown in FIG. The power is then cut off, so the drive mechanism stops.

In this way, the drive mechanism of this embodiment has a suction/discharge eject plate 13 that moves back and forth using an intermittent gear.
The driving force is appropriately separated from the eject arm by using the cam 7 at the base of the eject arm, the roller 14b of the slide plate, the slide plate 14, and the eject plate 13 for suction and discharge. However, this drive mechanism is designed to drive the eject arm 1 until the eject arm 1 overcomes the inverted position of the torsion spring 4. Therefore, the stroke of this drive mechanism does not need to exactly match the rotation start and completion positions of the eject arm, and it is only necessary to consider the lifting eject plate that is driven at the same time. As a result, the precision of the drive mechanism is low, and each member can be easily processed. In addition, the torsion spring that drives the eject plate 1 reverses its biasing direction midway through, so the load applied to the drive mechanism is greatest when the torsion spring is reversed and decreases thereafter. capacity can be halved compared to conventional mechanisms.

As described above, the loading eject mechanism of the present invention uses a spring that reverses the eject arm to bias the eject arm in both directions to position the cassette during suction and ejection. It is characterized by the fact that it is used only for practical purposes. Therefore, the invention is not limited to the illustrated embodiment.

For example, as the drive mechanism, an idler gear for reversing may be provided between the intermittent gear and the motor without reversing the motor as a means for reversing the intermittent gear. In addition, regarding the connection between the intermittent gear and the eject plate, instead of using a rack, a cam is provided on the intermittent gear to move the eject plate back and forth. You can also rotate it. Further, the number of eject plates does not need to be two, and a single eject plate may be used to rotate the eject arm and move the guide arm up and down.

Further, instead of a torsion spring, a coil spring and a link may be used as the spring, and the biasing direction thereof may be reversed.

[Effects of the invention] As described above, according to the invention, there is a simple means of rotating the eject arm using a reversing spring and separating the eject arm and its drive mechanism at both ends of its stroke. Provides a loading eject mechanism for a tape player that reduces the load on the drive mechanism, reduces the size of the mechanism, saves labor, and improves durability, and does not require high precision from each member that makes up the drive mechanism. can.

[Brief explanation of drawings]

Figures 1 to 3 are plan views showing the basic embodiment of the present invention. Figure 1 shows the eject position of the cassette, Figure 2 shows the position in the middle of loading, and Figure 3 shows the position when loading is completed. show. Figures 4 to 6 are plan views showing an example of the drive mechanism of the present invention, with Figure 4 showing the eject position of the cassette, Figure 5 showing the position in the middle of loading, and Figure 6 showing the position at the end of loading. . 1...Eject arm, 2...Pack guide, 3...Guide arm, 3a...Guide hole, 3
b...Pack stopper, 4...Torsion spring, 7...Cam, 7a...Pushing part, 7b...Relief part, 10...Drive gear, 11...Connection gear, 1
2...Intermittent gear, 13...Eject plate for suction and discharge, 13a...Rack, 14...Slide plate, 15...Pin, 16...Switch.

Claims (1)

[Claims for Utility Model Registration] Eject arm that moves back and forth between the front and back of the tape player by a drive mechanism, and a pack stopper that moves back and forth within the pack guide together with the cassette, which is interlocked with the eject arm. In the loading eject mechanism, the eject arm is provided with a spring whose biasing direction is reversed halfway through its rotational position, and when the eject arm is at the cassette eject position than the reversal position of the stroke, the The eject arm is biased toward the eject side, and when the eject arm is at the loading completion side, the eject arm is biased toward the loading completion side. A loading eject mechanism characterized by being separated from the drive mechanism.