JPS6230191Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tape recorder, and its purpose is to have a solenoid that is driven during recording and playback, and a solenoid that is driven when fast forwarding and rewinding. A transmission mechanism is used to release the brake on the reel stand and change the tape running path.
To provide a tape recorder that can accurately perform various operations such as recording, playback, and fast forwarding, and can also cope with increases and decreases in the number of heads without requiring major design changes.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is the main body, and below the front of it is an operation section 2 in which a VU meter, a volume control for level control, various switches, a digital display counter (none of which are shown), etc. are arranged.
is formed. A board 3 is installed above the operating section 2, and on this board 3, a drive mechanism for the tape recorder, a running mechanism for the tape T, a magnetic head, etc. are arranged as described below. be.

That is, reel stands 4a and 4b for feeding and winding the tape T are pivotally supported on the upper left and right sides of the board 3, and these reel stands 4a and 4b are driven by motor pulleys 6a and 5b fixed to the back surface of the board 3, respectively. 6b, V-belts 7a, 7b, respectively. One end of the lower half of the periphery of the reel stands 4a, 4b is attached to the board 3 with a stopper 8a, 8b.
Brake shoes 9a and 9b are fixed to the base plate 3 and have appropriate brake pads or the like affixed to the inner surface, respectively, and are wound around each other, and the other ends of the brake shoes 9a and 9b are rotatable about pivots 10a and 10b approximately at the center of the upper part of the base plate 3. It is connected to one end of each of the brake arms 11a and 11b which are pivotally supported. The other ends of the brake arms 11a and 11b are arranged close to each other and are pressed by a slide plate 23, which will be described later. Also, brake arm 11
Parts of a and 11b are connected to the upper end of the substrate 3 by springs 12a and 12b.

Below one reel stand 4b, a solenoid 13 that is energized during recording or playback operation is installed on the board 3.
Fixed on top. A spring 14 is connected to the tip of the plunger of the solenoid 13, and the end of the spring 14 is attached to the center plate 1, which is attached at a slight distance from the base plate 3.
A substantially F-shaped rotatable arm 16 pivotally supported by 5
is fixed at one end of the Pivot 17 of arm 16
The upper end of the arm 16 is connected to the upper edge of the center plate 15 by a spring 18, so that the upper end of the arm 16 is constantly biased toward the left in the figure. It can be rotated freely against the restoring force. Further, a pinch roller 19 is rotatably supported at the lower end of the arm 16 so as to be located on the front side of the center plate 15. Further, a link rod 20 is attached to the upper end of the arm 16, and the end of the link rod 20 is connected to a rotatable arm 2 which is pivotally supported on the central plate 15 by a pivot 21, similar to the arm 16.
It is connected to one end of 2. This arm 22 is approximately L
It has a letter-like shape, and its tip abuts against the lower end of the slide plate 23 mounted on the substrate 3.

The slide plate 23 is arranged along the height direction at the center of the board 3, and has guide pins 24a protruding from the board 3 at two locations, near the top end and near the approximate center in the length direction. , 24b, 24c, and is vertically movable along the length direction. The upper end of the slide plate 23 is close to the ends of both the brake arms 11a and 11b, and by sliding the slide plate 23 upward, it is possible to press the ends of both the brake arms 11a and 11b. The upper end of the slide plate 23 is always resiliently urged downward by a spring 25 whose one end is attached to the base plate 3.

A capstan driving motor 26 is fixed to the board 3 in the vicinity of the motor 5b, and a motor pulley 27 disposed on the board 3 and a capstan drive motor 26 are fixed to the board 3 in the vicinity of the motor 5b.
The flywheel 29 is connected to a flywheel 29 formed by 8 connected in series by a belt 30. The flywheel 29 is arranged on the back side of the center plate 15, and the capstan 28 is arranged close to the pinch roller 19 on the front side of the center plate. An impedance roller 31 is disposed on the center plate 15 near the pinch roller 19, and the pivot 3 of this impedance roller 31
2, a tension arm 34 whose end is biased by a spring 33 is rotatably supported, and a tension roller 35 is pivotally supported at the tip of the tension arm 34. In addition, a weight 36 is fixed to the other end of the tension arm 34.

A solenoid 37 is fixed adjacent to the slide plate 23 and is energized during fast forwarding or rewinding operations. The plunger of this solenoid 37 has guide pins 24b and 24 in the same way as the slide plate 23.
A vertically movable slide plate 3 supported by c
8 are connected. The lower end of this slide plate 38 is supported by a guide pin 39 protruding from the board 3, and the right end is supported by the arm 22.
Similarly, the slide plate 23 comes into contact with the lower end of the slide plate 23, and as the slide plate 38 moves upward, the slide plate 23
It is designed so that it can be pushed upward.

The left end of the slide plate 38 is a substantially V-shaped arm 41 rotatably supported on the base plate 3 by a pivot 40.
It is in contact with one end of the The other end of this arm 41 is in contact with one end of a substantially F-shaped lifter 42 which is rotatably supported by the central plate 15, and the lifter 42 can be driven by the rotational movement of the arm 41. . The lifter 42 is attached to the back side of the center plate 15, and a portion of the lifter 42 near the pivot 43 is connected to the upper edge of the center plate 15 by a spring 44. Also arm 41
A lifter rod 45 that protrudes inside the head housing 50 (described later) is connected to the tip of the lifter 42 on the opposite side from the contact portion with the head. The tape T, which is moving and is in sliding contact with an erasing head 51, a recording head 52, and a reproducing head 53, which will be described later, is pressed perpendicular to its running direction to check the sliding contact between the tape T and each head 51, 52, and 53. It acts to release it.

Below the slide plate 38, the other rotatable lifter 46 is supported by a pivot 47 on the back surface of the center plate 15 so as to be positioned substantially horizontally. One end of this lifter 46 is connected to the end of the upper slide plate 38 by a spring 48, and the other end of the lifter 46 has a lifter rod 49 that projects inside the head housing 50 similarly to the lifter 42. are installed in succession.
The upper end of the lifter 46 with the lifter rod 49 projecting therefrom is connected to the end of the arm 22 via a spring 66.

The head housing 50 has a substantially L-shaped side surface and is attached to the substantially central portion of the center plate 15. Inside this head housing 50, an erasing head 51, a recording head 52, and a playback head 53 are fixed in sequence along the running direction of the tape T via lifter rods 45 and 49, respectively, and guide rollers 54a for guiding the tape T. ,54b,54
c are attached to each. A notch 55 is provided on the front surface of the head housing 50 for receiving a lifter rod 49 that is driven by the lifter 46, and the tip of the lifter rod 49 is inserted into the notch 55.
It protrudes slightly from the outside. A cue operation plate 56 is disposed on the front surface of the head housing 50 adjacent to the notch 55 so as to be slidable vertically by a guide pin 57. This cue operation board 5
6 has its upper end secured to the upper end of the head housing 50 via a spring 58, and is always elastically biased downward, and is pressed by the upper edge of a pressing piece 59 provided at its lower end. Tsute lifter rod 49
It acts to push up the tape T and change the running path of the tape T to perform a cue operation. The cue operation plate 56 is provided with a knob or the like so that it can be operated from outside, such as a casing (not shown) covered with the head housing 50.

An impedance roller 60, a pivot 61, a spring 62, a tension arm 63, a tension roller 64, and a weight 65 are arranged at the left end of the central plate 15 in symmetry with the impedance roller 31 and the like.

To explain its operation, during recording or playback, the solenoid 13 is energized, and the suction action of the plunger causes the arm 16 to move the spring 16 around the pivot 17 via the spring 14.
8, the pinch roller 19 pivotally supported by the lower end of the arm 16 is moved obliquely upward, and the tape T is pinched between the pinch roller 19 and the capstan 28.
At the same time, the arm 16 is connected to the arm 2 via the link rod 20.
2 against the spring 66, and move the left end of this arm 22 upwards to remove the slide plate 2.
3 upward against the spring 25.
Due to this movement of the slide plate 23, the slide plate 23
The upper end pushes up each end of the brake arms 11a, 11b which are disposed close to each other upward, and the brake arms 11a, 11b are pushed up by the springs 12a, 1.
2b about the respective pivots 10a and 10b. Therefore, the brake shoes 9a, 9b whose one ends are fixed to the stops 8a, 8b, respectively, have their other ends relaxed by the rotation of the brake arms 11a, 11b, and the respective reel stands 4a, 4b
Each reel stand 4a, 4 is released from the pressure contact state with
This means that the braking state of b is released. During this time, the motors 5a, 5b for driving the reel stands 4a, 4b are energized, and the motor pulleys 6a, 6b and V
Reel stands 4a and 4b are rotated via belts 7a and 7b, respectively. On the other hand, the motor 26 for driving the capstan is also energized, and its rotation is transmitted through the motor pulley 27 and the belt 30 to the flywheel 26.
9 and the capstan 28,
The tape T, which is held between the capstan 28 and the pinch roller 19, runs over the recording head 52 and the reproducing head 53 while sliding thereon. In this way, a recording operation or a reproduction operation is performed together with the operation of a circuit (not shown).

Next, when fast forwarding or rewinding, the solenoid 37
is excited, and its plunger is attracted to move the slide plate 38 upward. Accordingly, the lower right end portion of the slide plate 38 pushes up the lower end portion of the slide plate 23, and similarly to the above, the slide plate 23 is moved upward, and the brake arms 11a, 11b are moved upward.
is rotated to release the brake shoes 9a, 9b pressed against the reel stands 4a, 4b, thereby making the reel stands 4a, 4b rotatable. On the other hand, the arm 41 in contact with the upper left end of the slide plate 38 is rotated about the pivot 40 by the movement of the slide plate 38, and its lower end kicks the lifter 42 below the arm 41. As a result, the lifter 42
rotates about the pivot 43 against the spring 44, moves the lifter rod 45 downward, and the lifter rod 45 lifts the tape T.
is pressed perpendicular to the running direction to release it from above the erasing head 51. At the same time, the left end of the other lifter 46 is connected to the left end of the slide plate 38 via a spring 48, so the movement of the slide plate 38 causes the lifter 46 to move around the pivot 47 and against the spring 66. Turn the lifter rod 49 to the center clockwise and move the lifter rod 49 to the cue operation plate 5.
The pressing piece 59 of No. 6 is moved downward until it reaches the vicinity of the upper edge. Therefore, the tape T, which was in sliding contact with the recording head 52, is pushed by the lifter rod 49 at right angles to the running direction and is released from above the recording head 52 and the reproducing head 53.

During this time, the motors 5a and 5b rotate and the reel stand 4
On the other hand, the solenoid 13 is in a de-energized state and the arm 16 is maintained in its original state by the spring 18 to separate the pinch roller 19 and the capstan 28, so that each head 5 is rotated.
The tape T released from the tapes 1, 52, and 53 is in a free state, and fast-forwarding or rewinding is performed by rotating the reel stands 4a, 4b.

At this time, by moving the cue operation plate 56 mounted on the head housing 50 upward against the spring 58, the upper edge of the pressing piece 59 comes into contact with the lifter rod 49, and the lifter rod 49 and therefore the lifter 46 is moved against the spring 48. Rotate upward against the force. As a result, the tape T, which had been running in sliding contact with the lower peripheral surface of the lifter rod 49 under a constant tension, moves upward following the lifter rod 49, and the reproducing head 53 is located behind the lifter rod 49 on the running path of the tape T.
The tape T comes into sliding contact with the top, and a cueing operation, that is, so-called cueing of the tape T becomes possible. In this embodiment, the cue operation board 56 is explained as having a sliding operation, but the present invention is not limited to this. The lifter rod 49 can also be pressed and moved.

Also, in the illustrated example, a so-called three-way head including an erasing head 51, a recording head 52, and a playback head 53 is shown.
Although a head-type tape recorder is shown, a so-called two-head type tape recorder having an erasing head and a recording/playback head can also be easily realized by the present invention. That is, in the case of a two-head type, for example, assuming that the head corresponding to the position of the erasing head 51 in the figure becomes unnecessary, the arm 41, lifter 4, spring 44, etc. become unnecessary, and by removing these, A two-head type tape recorder can be constructed without the need to replace other mechanical parts, and the compatibility of the device can be improved. In this case, it is of course necessary to change the electric circuit appropriately.

As described above, according to the present invention, an arm, a slide plate, etc. linked to a solenoid for recording or playback is used to press the capstan and the pinch roller, and to release the brake. A slide plate interlocked with the solenoid and at least one lifter are used to release the brake and release the tape from the magnetic head by moving the lifter rod. In addition, the reel stand brake release operation and tape running path change operation can be performed accurately during recording, playback, fast forwarding, and rewinding operations by only rotating or sliding operations using a simple transmission mechanism. This has the effect of simplifying the structure of the tape recorder and contributing to cost reduction.

In addition, by simply removing or adding an arm or a lifter, mechanical compatibility between the 3-head type and the 2-head type can be achieved, which has advantages such as being excellent in practicality and economy.

[Brief explanation of the drawing]

The figure is a front view of essential parts showing an embodiment of the present invention. 1...Main body, 2...Operation unit, 3...Board, 4
a, 4b...Reel stand, 5a, 5b...Motor,
6a, 6b...Motor pulley, 7a, 7b...V
Belt, 8a, 8b...stop, 9a, 9b...brake shoe, 10a, 10b...pivot, 11
a, 11b...Brake arm, 12a, 12b
...Spring, 13...Solenoid, 14...
Spring, 15...Central plate, 16...Arm, 17...Pivot, 18...Spring, 19
... Pinch roller, 20 ... Link rod, 21 ...
Pivot, 22... Arm, 23... Slide plate, 2
4a, 24b, 24c...Guide pin, 25...
Spring, 26... Motor, 27... Motor pulley, 28... Capstan, 29... Flywheel, 30... Belt, 31... Impedance roller, 32... Pivot, 33... Spring,
34...Tension arm, 35...Tension roller, 36...Weight, 37...Solenoid, 38...Slide plate, 39...Guide pin,
40... Pivot, 41... Arm, 42... Lifter, 43... Pivot, 44... Spring, 45...
...Lifter rod, 46...Lifter, 47...
Pivot, 48... Spring, 49... Lifter rod, 50... Head housing, 51... Erasing head, 52... Recording head, 53... Playback head, 54a, 54b, 54c... Guide roller,
55...notch, 56...queue operation panel, 57...
... Guide pin, 58 ... Spring, 59 ... Pressing piece, 60 ... Impedance roller, 61 ...
Pivot, 62... Spring, 63... Tension arm, 64... Tension roller, 65... Weight, 66... Spring.

Claims (1)

[Scope of utility model registration request] Solenoid 13 energized during recording or playback
, an arm 16 that is driven by the solenoid 13 and moves a pinch roller 19 pivotally supported at its end to press against the capstan 28;
6 by a link rod 20 and driven by the arm 16; an arm 22 driven by the arm 22;
and a brake arm 11a connected to the brake shoes 9a, 9b in order to relax the brake shoes 9a, 9b that press the reel stands 4a, 4b.
11b, a solenoid 37 that is excited during fast forwarding or rewinding, and a solenoid 37 that is driven by the solenoid 37 to relax the brake shoes 9a, 9b via the slide plate 23 and the brake arms 11a, 11b. at least one lifter that is driven by the slide plate 38 and includes a lifter rod that presses the tape T in sliding contact with the magnetic head to release the tape T from the magnetic head. A tape recorder characterized by: