JPS6040983Y2 - Operation mechanism of cassette tape recorder - Google Patents

Description

[Detailed description of the invention] The purpose of the invention is to provide an operating mechanism for a cassette tape recorder that can easily perform various operations such as forward and reverse winding, fast forwarding, rewinding, and pausing. A head panel configured to move forward and backward, left and right pinch roller arms equipped with pinch rollers, one end of which is connected to the head panel and an intermediate portion pivoted to the chassis, and the other end of the Masatomo right pinch roller arm. Left and right operating arms each having an engaging piece that can be engaged with the engaging portion provided at one end and a required inclined plate at the other end, and left and right solenoids for moving the Masatomo and right operating arms. and a center arm disposed between a reel holder that can be installed at a predetermined position and having a lower end corner contacting the inclined plate so that it can be moved by being pushed by the inclined plate when the inclined plate moves; The center arm is characterized by comprising an idler provided at a predetermined position on the center arm so as to be able to contact the reel pedestal and transmit the rotational force of the drive pulley when the arm moves to a predetermined position, and a device for rotating the drive pulley in the forward and reverse directions. This relates to the operating mechanism of a cassette tape recorder.

Embodiments of the present invention will be described below with reference to the drawings.

A motor 2 and a flywheel 2' that can communicate with the motor 2 are mounted on both sides of the head panel 1, which is configured to be able to advance and retreat in the vertical direction in the figure by operating a predetermined switch.
Capstans 2a and 2b (left capstan 2a, right capstan 2
b), and the left and right pinch roller arms 4a and 4b equipped with left and right pinch rollers 3 and at3b are arranged further to the sides of the right capstans 2a and 2b, and Masatomo and the right roller arm are installed. The intermediate portions of 4a and 4b are pivotally connected to a chassis (not shown).

In addition, springs 5a and 5b connect one end of the left and right roller arms 4a and 4b to a proper position on the head panel 1, and when the head panel 1 rises (in the direction of approach to the cassette), the springs 5a+5b1 left and right roller arms 4a, 4b to the left and right pinch rollers 3a, 3b to the left,
The structure is such that the right capstan 2at2b can be pressed.

Left and right solenoids 7a and 7b are disposed above engaging portions 6a and 6b provided at the other ends of left and right roller arms 4a and 4b, and plungers 8a and 8b of Masatomo and right solenoids 7a and 7b are provided. It is configured to be movable in the vertical direction, and has engaging portions 6a, 6 of the left and right roller arms 4at4b at one end.
A plunger 8a connects the left and right operating arms 10a, 10b at appropriate positions, and includes engagement pieces 9a, 9b that can be engaged with the left and right operating arms 10a, 10b.

In the extended state of 8b, the engaging parts 6a, 6b and the engaging pieces 9a, 9
b), left and right solenoids? When the plungers 8a and 8b of the left and right operating arms 10a and 10b are moved by contracting the plungers 8a and 8b of the left and right operating arms 10a and 10b, the engagement pieces 9a and 9b of the left and right operating arms 10a and 10b engage the left and right roller arms 4a and 4b. By engaging with the joining parts 6a, 6b, the left and right roller arms 4a*4b are rotated in a predetermined direction, and the left and right pinch rollers 3a, 3b are configured to be separated from the left and right capstans 2a, 2b. .

Further, the other ends of the left and right operating arms 10a and 10b are extended above the head panel 1 so as to face each other, and furthermore, the other ends of the left and right operating arms 10a and 10b have sloped portions in opposite predetermined directions. Inclined plate 11a made of an elastic material such as a leaf spring
, llb are mounted facing each other at a predetermined interval.

Between a supply reel holder 12 and a take-up reel holder 13 (for convenience of explanation, the left reel holder is used for supplying and the right reel holder is used for winding), which can be installed at a predetermined position above the head panel 1. A center arm 14 is provided, and the center arm 1
4 are brought into contact with the inclined plates 11a and 11b, the lower end is connected to the other end of a spring 15 with one end fixed in place, and the upper end is supported on the chassis by a slide guide 17.

Brake shoes 16a and 16b for contacting the supply reel holder 12 and the take-up reel holder 13 are provided on both sides of the lower part of the brake arm 16 disposed above the supply reel holder 12 and the take-up reel holder 13, and A vertically elongated hole 18 is provided at a proper central position, and a support pin 19 erected on the chassis in the elongated hole 18 and a guide pin 19' erected at a required distance from the support pin 19 are loosely fitted into the elongated hole 18. It is configured so that it can move up and down within the range of .

Further, a spring 20 is interposed between the brake arm 16 and the support pin 19, so that the brake shoes 16a and 16b are connected to the supply reel holder 12 when the tape recorder is stopped.
, and is configured to press against the take-up reel holder 13.

In addition, brake arm push-up parts 21a and 21b are provided at appropriate locations on the window and the right operating arms 10a and 10b, and the push-up parts 21
a, 21b are engaged with appropriate positions on the brake arm 16, the left solenoid 7a or the right solenoid 7b is contracted, and the brake arm 16 is moved upward by the pushing part 21a or 21b, that is, the brake shoe 1
6a.

16b is constructed so that it can be separated from the supply reel holder 12 and the take-up reel holder 13.

Further, an idler 22 is provided at the center of the center arm 14, and when the plunger 8a of the left solenoid 7a is contracted, the center arm 14 is moved diagonally upward and to the right by the inclined plate 11a, and the idler 22 is disposed on the back side of the center arm 14. The right solenoid 7b is configured so that the take-up reel holder 13 can be rotated by contacting the pulley 24 attached to the shaft of the motor 23 that rotates the motor 23 and at the same time contacting the take-up reel holder 13.
When the plunger 8b is retracted, the center arm 14 is moved obliquely to the upper left by the inclined plate 11b, and the idler 22 contacts the pulley 24, and at the same time the supply reel cradle 12
The supply reel holder 12 is configured to be able to rotate in contact with the supply reel holder 12.

Furthermore, protrusions 25a and 25b are provided at appropriate positions on the left and right operating arms lea and 10b, and when the protrusions 25a rise due to the rise of the left operating arm 10a, they are placed at required positions above the protrusions 25a. The changeover switch 26a is turned on before the idler 22 and the pulley 24 come into contact with each other, so that when only the changeover switch 26a is turned on, the motor 23 can rotate forward (in the X direction). When the projecting portion 25b rises due to the rise of
(anti-X direction).

In the figure, 1' is the slide guide, 4, 4' are the shafts, 10.10
' is a slide guide.

In addition, in this invention, in order to be able to perform forward (forward rotation) and reverse (reverse direction rotation), the forward recording, playback, and fast forward switch is connected to the left solenoid 7a, and The reverse recording, playback and rewind switches are connected to the right solenoid 7b.

Furthermore, when the pause switch is operated in forward mode, the right solenoid 7b is energized, and when the pause switch is operated in reverse mode, the left solenoid 7a is energized, and when the pause switch is operated again, each Tsure/id 7a.

7b is arranged to be demagnetized.

Next, the operation will be explained.

First, the left and right capstans 2a*2b are rotated in a predetermined direction by turning the power switch ON to drive the motor 2 and flywheels 2', 2'.

When recording or the like, the head panel 1 is raised (direction A) by operating a predetermined switch.

At the same time, the left solenoid 7a is energized to contract the plunger 8a and pull up the left operating arm 10a (in direction B).
.

When the head panel 1 rises, the right roller arm 4b connecting the head panel 1 and the spring 5b is connected to the spring 5b.
Since the force causes the right pinch roller 3b to rotate in the direction B about the shaft 4' as a fulcrum, the right pinch roller 3b is pressed against the right capstan 2b which is rotating in a predetermined direction and rotates in a predetermined direction (
At this time, the engaging piece 9b and the engaging portion 6b do not engage because there is a gap G).

On the other hand, the left roller arm 4a also tries to rotate in the D direction due to the force of the spring 5a, but the left operating arm 10a moves in the B direction due to contraction of the plunger 8a, so the engagement piece 9a
The engaging portion 6a is pulled up to rotate the left roller arm 4a in the warping direction, so that the left pinch roller 3a does not come into contact with the left capstan 2a.

Furthermore, when the left operating arm 10a is pulled up in the B direction, the push-up part 21a pushes up the brake arm 16 in the E direction, so that the brake shoes 16a and 16b are pushed up against the supply reel cradle 12.
At the same time, the engaging slant plate 11a is also pulled up in the E direction, so that the center arm 14 in contact with the slant plate 11a moves diagonally upward and to the right, and the center arm 141; the installed idler 22 is pulley 24
The rotational force of the pulley 24 can be transmitted to the take-up reel holder 13 by rotating in contact with the take-up reel holder 13 and also in contact with the take-up reel holder 13 .

Therefore, the tape can be fed forward by the rotational force of the right pinch roller 3b and the rotational force of the take-up reel cradle 13.

The motor 23 is rotated in the forward direction (X direction) by moving the left operating arm 10a in the B direction so that the protrusion 25a contacts the left changeover switch 26a and turns it on.

If you want to pause in this forward state, operate the pause switch.
b is energized and the plunger 8b is pulled up.

When the plunger 8b is pulled up, the engagement piece 9b of the right operating arm IDb pulls up the retaining portion 6b of the right roller arm 4b, so the right roller 4b is rotated in the counter-C direction and the right pinch roller 3b is rotated. It separates from the right capstan 2b.

At the same time, the inclined plate 11b of the right operating arm 10b is pulled upward, so the center arm 14 is pushed to the left, the idler 22 is separated from the take-up reel holder 13, and the rotation of the take-up reel holder 13 is stopped. do.

In this way, the head panel 1 can be temporarily stopped by stopping the rotation of the take-up reel holder 13 while remaining in the cassette, and by separating the right pinch roller 3b from the right capstan 2b.

When restarting the operation, the right solenoid 7b is demagnetized by operating the temporary stop switch again.

When the right solenoid 7b is demagnetized, the plunger 8b extends, so that the engagement piece 9b of the right operating arm 10b and the engagement part 6b of the right roller arm 4b are released, and the right pinch roller 3b is moved again to the right capstan 2b. Rotates in contact with .

At the same time, the right inclined plate 11b moves downward, so the center arm 14 moves rightward, and the idler 22 contacts the take-up reel pedestal 13 again to transmit rotation.

In this way, when reoperating, the head panel 1 can be kept in the advanced state, so there is no impact force on the tape, and the tape does not shift.

Next, when recording etc. in reverse, raise the head panel 1 by operating the specified switch (A
direction).

At the same time, the right solenoid 7b is energized to contract the plunger 8b and pull up the right operating arm 10b (in the F direction).
.

When the head panel 1 rises, the left roller arm 4a connecting the head panel 1 and the spring 5a is connected to the spring 5a.
Since the force causes the left pinch roller 3a to rotate in the D direction about the shaft 4, the left pinch roller 3a is pressed against the left capstan 2a, which rotates in a predetermined direction, and rotates in a predetermined direction.

On the other hand, the roller arm 4b also tries to rotate in the C direction by the spring 5b, but the right operating arm 10b moves in the F direction due to the contraction of the plunger 8b, so the engaging part 9b is pulled up by the engaging piece 9b, and the right roller arm 4b in the counter-C direction, so that the right pinch roller 3b does not come into contact with the right capstan 2b.

Also, when the right operating arm 10b is pulled up in the F direction, the push-up part 21b pushes up the brake arm 16 in the C direction, so the brake shoes 16a and 16b are pushed up against the supply reel cradle 12.
At the same time, the inclined plate 11b is also pulled up in the C direction, so that the center arm 14 in contact with the inclined plate 11b moves diagonally upward to the left, and the idler 22 provided on the center arm 14 moves upward. It rotates in contact with the pulley 24 and also contacts the supply reel pedestal 12 so that the rotational force of the pulley 24 can be transmitted to the supply reel pedestal 12.

Therefore, the tape can be fed in the reverse direction by the rotational force of the left pinch roller 3a and the rotational force of the supply reel holder 12.

The motor 23 is rotated in the reverse direction (anti-X direction) by moving the right operating arm 10b in the F direction so that the protrusion 25b contacts the right changeover switch 26b and turns it on.

If a temporary stop is to be performed during this reverse state, the left solenoid 7a is energized by operating the temporary stop switch, and the plunger 8a is pulled up.

When the plunger 8a is pulled up, the engagement portion 6a of the left roller arm 4a is pulled up by the engagement piece 9a of the left operating arm 10a, so the left roller arm 4a is rotated in the warping direction and the left pinch roller 3a is It separates from the left capstan 2a.

At the same time, the inclined plate 11a of the left operating arm 10a is pulled upward, so the center arm 14 is pushed to the right, the idler 22 is separated from the supply reel pedestal 12, and the rotation of the supply reel pedestal 12 is stopped.

In this way, the head panel 1 can be temporarily stopped by stopping the rotation of the supply reel receiver 12 and separating the left pinch roller 3a from the left capstan 2a while the head panel 1 remains in the cassette.

When restarting the operation, the left solenoid 7a is demagnetized by operating the temporary stop switch again.

When the left solenoid 7a is demagnetized, the plunger 8a extends, so that the pinch roller 3a, which has been disengaged from the engagement piece 9a of the left operating arm 10a and the engagement portion 6a of the left roller arm 4a, moves again to the left capstan. 2a and rotates.

At the same time, the left inclined plate 11a moves downward, so the center arm 14 moves to the left, and the idler 22 contacts the supply reel pedestal 12 again to transmit rotation.

In this way, even when the reverse operation is restarted, the head panel 1 can be operated in the advanced state, so that there is no impact force on the tape and the tape does not shift.

When performing fast forwarding, the head panel 1 is kept in a retracted state, and a predetermined switch is operated to excite the left solenoid 7a.

When the left solenoid 7a is energized, the brake arm 16 is pushed up by the pushing part 21a of the left operating arm 10a and separated from the supply reel holder 12 and the take-up reel holder 13, and at this time, the engaging piece 9a and the engaging part 6a What is gap G?
At the same time, the left inclined plate 11a moves the center arm 14 diagonally upward and to the right, and the pulley 24
The idler 22 that has come into contact with the
4 is rotating forward).

Rapid feed can be performed by rotating the supply reel cradle in this manner.

At this time, of course, the left and right pinch rollers 3at
3b is in a non-contact state with the left and right capstans 2a and 2b.

Further, when performing rewinding, the right solenoid 7b is energized by operating a predetermined switch, so that rewinding can be performed in an operation symmetrical to the above-described fast forwarding operation.

Since the present invention is a mechanism that can perform forward and reverse operations, it is of course possible to easily perform auto-reverse operations by, for example, providing a tape tension detector and incorporating the detector and each plunger into a logic circuit. In addition, in the above embodiment, a changeover switch is provided to rotate the drive pulley in the forward and reverse directions, but it is also possible to change the drive pulley in the forward and reverse directions by controlling the stoppage of rotation of the reel pedestal using logic. It goes without saying that the above system may be adopted for forward and reverse rotation, and that other changes may be made without departing from the gist of the present invention.

Since the present invention has a structure similar to that described above, winding in the forward and reverse directions, rewinding, and pausing operations can be performed easily and reliably, especially when pausing during recording and playback. Since the rotation of the reel pedestal is stopped while the head panel remains in the state, and the pinch roller is separated by the capstan, the impact force on the tape when the head panel enters is eliminated, and the tape is prevented from slipping. This has the excellent effect of eliminating erased residue caused by misalignment.

[Brief explanation of the drawing]

The figure is a configuration diagram of an embodiment of the present invention. 1...Head panel, 2a, 2b...
Capstan, 3at3b...pinch roller,
4a, 4b...Pinch roller arm, 6a, 6
b...Engagement portion, 7a, 7b...Solenoid, 9a, 9b...Engagement piece, 10a, 10b
......Operation arm, 11a, llb...
Inclined plate, 12... Supply reel cradle, 13...
...Take-up reel pedestal, 14...Center arm, 22...Idler, 24...Pulley.

Claims (1)

[Scope of utility model registration request] A head panel configured to move forward and backward, left and right pinch roller arms equipped with pinch rollers, one end of which is connected to the head panel and an intermediate portion pivoted to the chassis, and an engagement provided at the other end of the Masatomo right pinch roller arm. Between the left and right solenoids for moving the left and right operating arms, which have an engagement piece that can be engaged with the joint at one end and a required slope plate at the other end, and a reel holder that can be installed at a predetermined position. a center arm which is arranged in the center arm and whose lower end corner is in contact with the inclined plate so that it can be moved by being pushed by the inclined plate when the inclined plate moves; and when the center arm moves to a predetermined position, the reel receiver An operating mechanism for a cassette tape recorder, comprising: an idler provided at a predetermined position on a center arm so as to be in contact with the base and capable of transmitting the rotational force of the drive pulley; and a device for rotating the drive pulley in forward and reverse directions.