JPH0430680Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tape guide for a tape recorder used in an answering machine or the like.

[Prior art]

Conventionally, in tape recorders used in answering machines, the tape is run frequently, and uneven tape winding causes poor sound quality during recording. Since it is necessary to guide the tape sufficiently, an independent fixed tape guide 33 is provided on the head board 1 as shown in FIG.

However, when the tape runs at a constant speed, the pinch roller 1
Since the pinch roller 2 pinches the tape and is pressed against the capstan shaft 11, there is no vertical vibration of the tape, but when running at high speed, the pinch roller 12 presses the capstan shaft 11.
Since the fixed tape guide 33 and the magnetic heads 28 and 29 are separated from each other, a blank area of the guide is created, which causes the tape to swing up and down, and when erasing the tape during high-speed rewinding with an answering machine, it cannot be erased reliably. Something happened. Furthermore, providing an independent fixing tape guide 33 has the drawback of increasing installation and component costs.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention reduces the vertical deflection of the tape even during high-speed rewinding when the pinch roller is separated from the capstan shaft, and reduces the number of parts to reduce installation and parts costs.

[Structure of the idea]

The present invention provides a tape recorder in which a pinch roller is provided on a rotatable arm, the pinch roller is pressed against a capstan shaft for playback, and the pinch roller and the capstan shaft are slightly separated for high-speed running. , the arm is formed in a substantially inverted L-shape, and the pinch roller is provided on the long side of the substantially inverted L-shaped arm with the pivot point of the arm as a boundary;
A tape guide is provided on each short side of the approximately inverted L-shaped arm, and even in a high-speed running state where the pinch roller and the capstan shaft are slightly separated, the tape guide guides the tape and maintains the contact position between the head and the tape. The reason is that it has been regulated.

〔Example〕

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. The tape guide of the tape recorder is shown in FIGS. 1 and 2 in which the head board 1 is placed on the resin-molded board 2 so that the tape cassette 10 is manually moved back by grasping the bent part 1a only when loading or unloading the tape cassette 10. This is a type of tape recorder. Pin 3a of arm 3 that holds the pinch roller provided on head board 1
is pushed by an eccentric cam 4a of an assist gear 4 supported on the lower side of the base plate 2 and moved back and forth, and the pinch roller 12 is pressed against the capstan shaft 11. Board 2
Reel shafts 13 and 14 are fixedly planted upward in the reel shafts 13 and 14, respectively, and a tape take-up reel stand 15 and a tape supply reel stand 16 are mounted on each of these reel shafts 13 and 14.
is rotatably inserted. Take-up reel stand 15
A take-up reel gear 17 and a supply reel gear 18 are respectively attached to the supply reel stand 16 via a friction mechanism. A flywheel 19 integrally having a capstan shaft 11 is rotatably supported on the board 2, and the capstan shaft 11 passes through the head board 1 and projects upward. The flywheel 19 has a circumferential groove, and the belt 2 hung on the circumferential groove.
It is designed to be rotationally driven by a motor 21 which rotates in both directions via a motor.

A capstan gear 22 is attached to the capstan shaft 11.
is fixed, and the gear arm 5 is provided so as to be rotated in the rotational direction of the capstan shaft 11 via a friction mechanism. On both sides of the gear arm 5, gears 23 and 24, which are always in mesh with the capstan gear 22, are supported by shafts 25 and 26, and one gear 23 and shaft 25 are provided with a friction mechanism.

The head board 1 is always urged forward by a spring 27. A recording/reproducing head 28 and an erasing head 29 are provided on the head substrate 1, and a shaft 30 for rotatably supporting the arm 3 is fixedly mounted thereon.

As shown in FIGS. 1 to 3, the arm 3 is rotatably supported around a shaft 30 as a rotational fulcrum, and is formed into a substantially inverted L shape, with the right side longer than the shaft 30 and the left side shorter than the shaft 30. ing. A pinch roller 12 is rotatably supported on the long side of the arm 3 to the right of the shaft 30, and the pinch roller 12 is urged to be pressed against the capstan shaft 11 by a spring 31 fitted to the shaft 30. There is. The pin 3a is formed on the long side of the arm 3 and passes through the hole 2a of the substrate 2 to connect the eccentric cam 4.
It faces so that it can slide into contact with a. Axis 3 of arm 3
A tape guide 3b and a cassette stop 3c are formed on the short side to the left of 0, and the cassette stop 3c
The tape cassette 10 is constructed so that the tape cassette 10 cannot be loaded unless the head board 1 is manually moved back sufficiently. The tape guide 3b is the arm 3
The pinch roller 12 is provided on the opposite side of the rotation fulcrum. On the board 2 are guide pins 2b,
2b is fixed and the tape cassette 10 is positioned.

The operation of the tape guide of the tape recorder is such that in the recording/playback mode shown in FIG. 1, the motor 21 and flywheel 19 shown in FIG.
A gear 23 that is constantly meshed with the take-up reel gear 1
7 is engaged. The arm 3 is controlled by a pin 3a and an eccentric cam 4a and moved forward by a spring 31, and the pinch roller 12 on the long side is pressed against the capstan shaft 11 by sandwiching the tape 32 shown in FIG. is tape take-up reel stand 1
It is running at a constant speed on the 5 side. The tape guide 3b and cassette stopper 3c on the short side are connected to the tape cassette 10.
The tape guide 3b is inserted into the tape 32 and is in shallow sliding contact with the tape 32.

Next, when the mode is switched to high-speed rewinding mode, the motor 21 and flywheel 19 are rotated counterclockwise, the gear arm 5 is rotated counterclockwise, and the gear 24 that is constantly meshed with the capstan gear 22 is supplied. It is meshed with the reel gear 18. The arm 3 is rotated as shown in FIG. 4 with the pin 3a controlled by an eccentric cam 4a, and the pinch roller 1
2 is retracted and separated from the capstan shaft 11. The tape 32 is rewound toward the tape supply reel stand 16 at high speed. At this time, the tape guide 3b provided on the short side of the arm 3 is inserted deeper into the tape cassette 10 than in the recording/playback mode, and the tape 3
It is in sliding contact with 2.

If the tape guide 3b is provided on the short side to the left of the shaft 30 of the arm 3 as described above, even if the pinch roller 12 separates from the capstan shaft 11 due to unwinding of the tape during high-speed running, the tape guide 3b will not hold the tape cassette. Since the tape is inserted deeper into the tape cassette than in the recording/playback mode, vertical vibration of the tape is reduced, and the contact position between the head and the tape is regulated, eliminating slack in the tape inside the tape cassette and allowing high-speed operation. The tape is reliably erased by running. Furthermore, since the tape guide is provided on the opposite side of the arm rotation fulcrum from the pinch roller,
The configuration is simple, and the tape guide is advanced in synchronization with the retraction of the pinch roller without using any other means.
Furthermore, the fixing tape guide 33 of the conventional example is no longer necessary, the number of parts is reduced, and installation and parts costs are reduced.

When a tape recorder is incorporated into an answering machine, the operation is as follows: A call is made → An announcement is made using a voice synthesis IC, etc. → The motor is rotated to record the message → The call is hung up → The motor stops and stands by. ...is repeated.

Next, when you want to play back the contents of a call, cancel the answering machine → the motor rotates and rewinds → the tape winding start position → the motor rotates to play the message → playback ends → the motor rotates to rewind and at the same time erase the recorded content → the motor rotates Stop and wait. ...becomes...

Even if the tape is run at high speed when erasing the tape, the tape guide 3b reduces the vertical vibration of the tape and ensures erasing.

[Effect of idea]

Since the present invention is constructed as described above, even if the pinch roller is separated from the capstan shaft during high-speed rewinding, the tape guide is inserted deeper into the tape cassette than in the recording/playback mode to guide the tape. This reduces vertical vibration of the tape and regulates the contact position between the head and tape.
There is no tape slack in the tape cassette, and the tape can be erased reliably at high speed.
Since the tape guide is integrally formed with the arm, it is possible to provide a tape guide for a tape recorder that has excellent practical effects such as easy assembly and reduced installation and component costs.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view showing the position of the tape guide in the recording/playback mode of the tape recorder, FIG. 2 is an exploded perspective view of the tape recorder, and FIG. is a perspective view of the arm, the fourth
This figure is a plan view showing the position of the tape guide in rewind mode, and FIG. 5 is a plan view of a conventional tape recorder. 3... Arm, 3b... Tape guide, 11...
... Capstan shaft, 12 ... Pinch roller, 30
...Rotation fulcrum (axis), 32...Tape.

Claims (1)

[Scope of utility model registration request] In a tape recorder, a pinch roller is provided on a freely rotatable arm, the pinch roller is pressed against a capstan shaft for playback, and the pinch roller and the capstan shaft are slightly separated for high-speed running. The pinch roller is formed in a substantially inverted L-shape, and the pinch roller is disposed on the long side of the substantially inverted L-shaped arm with the pivot point of the arm as a boundary.
Tape guides are provided on each of the short sides of the letter-shaped arms, so that even when the pinch roller and the capstan shaft are running at high speed with a slight distance between them, the tape guides guide the tape and regulate the contact position between the head and the tape. A tape guide for a tape recorder that is characterized by: