JPH0319084Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cassette tape recorder, and more particularly to a cassette tape recorder in which the playing state is powered-assisted and the cassette pack is manually removed.

[Prior Art] Conventionally, power assist in this type of tape recorder is as shown in FIG. The lock lever 4 that is rotated by the lock lever 4 releases the lock of the intermittent gear 5 and slightly rotates the intermittent gear 5, causing the intermittent gear 5 to mesh with the pinion 6 that interlocks with the flywheel (not shown), and by the inertia of the flywheel. The roller 5a provided on the intermittent gear 5 is connected to the head base 7.
This moves the head 8 to the recording/playback position. Note that 9 is a pinch roller, 10 is a pinch roller bracket, and 11 is a capstan shaft.

This power assist mechanism will be explained in detail with reference to the enlarged view of FIG. 2. Reference numeral 5 denotes an intermittent gear that meshes with a pinion 6 of the flywheel. As shown in Figure (a), in the ejected state, the intermittent portion 5c faces the pinion 6 side and is out of mesh with the pinion 6. The lock lever 4 has a substantially Y-shape, and its branch part is supported on the chassis by a shaft 12, and one end 4a of the lock lever 4 is
is connected to solenoid 3 and braked. Also, one of the other ends has a locking portion 4 that engages with the protrusion 5b.
b, and the other has a sloped portion 4c at its tip. The pressing lever 13 is supported by the chassis by a shaft 14, and is always pressed in a fixed direction by a spring 15. When the solenoid 3 is OFF [Fig. 2 (a)], the protrusion 5b of the intermittent gear 5 locks the locking lever 4. Part 4b
At the same time as the press lever 13 is locked, it is located at the oblique side 13a at the tip of the press lever 13, and the solenoid 3 is turned on.
At the same time, the lock lever 4 moves clockwise and the protrusion 5
b is released from the locking portion 4b, the protrusion 5b is pushed by the oblique side 13a of the pressing lever 13, and the intermittent gear 5 is sent to a position where it meshes with the pinion 6 as shown in FIG. 2(b).

Next, due to the inertia of the flywheel, the pinion 6
When the rotation of the intermittent gear 5 is transmitted to the intermittent gear 5 and further rotates counterclockwise, the roller 5a of the intermittent gear 5 comes into contact with the inside of the bent portion 7a of the head base 7, as shown in FIG. As the head base 7 rotates, it moves in the direction of the arrow in FIG. 2(c), that is, moves forward. When the solenoid 3 is turned on and the intermittent gear 5 rotates, the protrusion 5b is locked at the slope portion 4c of the lock lever 4, and the head base 7 is in the stopped state in the forward position, that is, in the recording or playback state.
Next, in the case of canceling this performance state, when the eject lever 16 shown in FIG. 1 is pushed in, the lever 16
By pushing the lever 17 laterally on the inclined surface 16a at one end, a switch fixed to the chassis is operated, and the solenoid 3, which was in the ON state during the performance, is switched to the OFF state. When the solenoid 3 is turned off, the lock lever 4 that was being held is pulled back counterclockwise by the spring 18. At this time, the head base 7 is pressed in the backward direction by the spring 19, and the bent portion 7a of the base 7 pushes the roller 5a of the intermittent gear 5, causing the intermittent gear 5 to rotate counterclockwise. Then, as shown in FIG. 2(a) again, the intermittent gear 5, which had been locked by the slope part 4c of the lock lever 4, reaches a position between the position of the locking part 4b of the lock lever 4 and the tip of the slope part 13a of the pressing lever 13. It rotates and stops, and is in an ejected state where it disengages from the pinion 6 of the flywheel.

[Problems to be Solved by the Invention] However, in the conventional cassette tape recorder described above, the cassette pack 1 cannot be moved between the time when the intermittent gear 5 engages with the pinion 6 and the time when the head base 7 starts moving forward. If you eject,
The head base 7 did not stop immediately, but continued to move forward due to the inertia of the flywheel, stopping near the recording/playback position, and then moving the cassette pack 1.
Even if the user attempts to insert the cassette pack 1, the cassette pack 1 collides with the advanced head 8, making it impossible to insert the cassette pack 1.

In view of the above points, it is an object of the present invention to provide a cassette tape recorder in which the head base does not move forward even with power assist in the ejected state where a cassette pack is not attached.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a stopper body that moves back and forth in conjunction with the attachment of the cassette pack, and the pinch roller bracket is provided with a stopper body that moves back and forth in conjunction with the attachment of the cassette pack. The device is characterized by the provision of a first engaging portion that abuts the locking portion and a second engaging portion that abuts the head base and restricts the forward movement of the head base.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 3 is a plan view of a cassette tape recorder according to an embodiment of the present invention, FIG. 4 is a plan view of the main parts, and FIG.
The figure is a side view of the main parts. 3 shows a state in which the head base has finished moving forward after the cassette pack is attached, and FIGS. 4 and 5 show the state in which the cassette pack is not attached. Also, in this embodiment, similar to the conventional example described above, The same reference numerals are given to the configurations, and the explanation thereof will be omitted.

As shown in these figures, a pinch roller bracket 10 that supports the pinch roller 9 is provided with a guide pin 20 that projects upward and a guide roller 21 that is coaxially arranged at the base of the guide pin 20. Further, the head base 7 is provided with an opening 7c into which the guide roller 21 is inserted, and a locking portion 7b is provided at the upper edge of the opening 7c in the figure. The pinch roller bracket 10 is configured to move backward in conjunction with the head base 7 by the guide roller 21 coming into contact with the lower edge of the opening 7c in the figure, and thereby the pinch roller 9
is separated from the capstan shaft 11.

Reference numeral 22 denotes a switch lever, which has a bent portion 22a, a switch operation portion 22b, and an elongated hole 22c, and the bent portion 22a is formed at a position opposite to the guide pin 20. This switch lever 22 has an elongated hole 22c at the upper end that is loosely fitted into a support shaft 23 planted in the chassis, and a lower end which is connected to the connecting rod 23.
It is fixed to 4. This connecting rod 24 is fixed by a screw 26 to a link 25 supported by the cassette holder 2, and when the cassette pack 1 is inserted into the cassette holder 2, the link rotates in conjunction with the cassette holder 2 that descends. It is designed to move forward following the movement of 25. Therefore, when the cassette pack 1 is inserted into the cassette holder 2, the switch lever 22 follows the advancing connecting rod 24 and is in the forward position as shown in FIG. When not, it is in the retracted position.

In the cassette tape recorder configured in this manner, when the cassette pack 1 is installed in the cassette holder 2, the cassette holder 2 is lowered and the connecting rod 24 is connected via the link 25, which rotates in conjunction with the lowering of the cassette holder 2. moves forward, and the switch lever 22 also moves forward by the connecting rod 24.
When the switch lever 22 moves forward, the switch operating section 22b turns on a switch (not shown) to turn on the solenoid 3, and as in the conventional example described above, the intermittent gear 5 rotates due to the inertia of the flywheel.
As shown in FIG. 2(c), the roller 5a presses the bent portion 7a of the head base 7 to move the head base 7 forward. In this case, the switch lever 22 is in the forward position as described above, and the bent portion 22a is in a position sufficiently separated from the guide roller 20, so the pinch roller bracket 10 rotates in the forward direction in conjunction with the head base 7. The pinch roller 9 can be brought into pressure contact with the capstan shaft 11, and the recording/playback state is established.

On the other hand, if the cassette pack 1 is removed by the eject operation immediately after the cassette pack 1 is installed, that is, if the cassette pack 1 is ejected between the time when the intermittent gear 5 engages with the pinion 6 and the time when the head base 7 starts moving forward. In this case, the connecting rod 24 and the switch lever 22 return to the retracted position in conjunction with the rising cassette holder 2, and the bent portion 22a moves to a position close to the guide pin 20, so that the guide pin 20 comes into contact with the bent portion 22a. Possibly pinch roller bracket 10
rotation of the pinch roller bracket 1 is prevented.
The locking portion 7b on the upper edge of the opening 7c comes into contact with the guide roller 21 of 0, thereby preventing the head base 7 from moving forward. Therefore, even if the cassette pack 1 is ejected immediately after being folded and installed, the cassette pack 1 can be installed again next time, and after the cassette pack 1 is reinstalled, the switch lever 22 moves forward to release the pinch roller bracket. In order to release the restriction 10, the head base 7 can move forward and enter the recording/playback state.

[Effect of the invention] As explained above, according to the invention, since the stopper body is provided to prevent the head base from moving forward when the cassette pack is not attached, even if the cassette pack is ejected immediately after being attached. , then the cassette pack can be fitted again.

[Brief explanation of the drawing]

Figure 1 is a plan view of a conventional cassette tape recorder, and Figure 2 is a diagram showing the power assist structure and operation in the tape recorder, (a) at eject, (b) at the beginning of power assist operation, and (c). Each figure shows the state in which the head base has finished moving forward in the later stages of power assist. Fig. 3 is a plan view showing the overall structure of the embodiment of the invention, Fig. 4 is a plan view showing the main parts of the embodiment of the invention, and Fig. 5 is a side view showing the main parts of the embodiment of the invention. . 1...Cassette pack, 2...Cassette holder, 7...Head base, 7c...Opening, 8...
...Head, 9...Pinch roller, 10...Pinch roller bracket, 20...Guide pin (first engagement part), 21...Guide roller (second engagement part), 22...Switch lever ( stoppa body), 2
2a...Bending piece (locking part), 24...Connecting rod,
25...link.

Claims (1)

[Scope of utility model registration request] A cassette holder 2 into which the cassette pack 1 is loaded and unloaded, a rotatable pinch roller bracket 10 that supports the pinch roller 9, a head base 7 on which the head 8 is mounted and which can be moved back and forth, and a head base 7 that is positioned at the recording/playback position. A cassette tape recorder is provided with a power assist mechanism that moves the head base 7 forward and backward relative to the cassette tape recorder, and the head base 7 is advanced to a recording/playback position by the power assist mechanism when the cassette pack 1 is inserted into the cassette holder 2. The cassette holder 2 is provided with a connecting rod 24 that moves back and forth in conjunction with the loading and unloading of the cassette pack 1. A stopper body 22 having a locking portion 22a is connected to the connecting rod 24, and the pinch roller bracket 10 is connected to the connecting rod 24. A first engaging part 20 that is removably engageable with the locking part 22a and a second engaging part 21 that is removable with the head base 7 are provided, and when the cassette pack 1 is not attached, the cassette pack 1 is placed in the retracted position. The first engaging portion 20 is attached to the locking portion 22a of a certain stopper body 22.
The rotation of the pinch roller bracket 10 is regulated by the abutment of the pinch roller bracket 10, and the forward movement of the head base 7 is regulated by the abutment of the head base 7 with the second engaging portion 21 of the pinch roller bracket 10. A cassette tape recorder characterized by being configured as follows.