JPS587494Y2 - Jikiki Rokusai Seisouchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic recording/reproducing device such as a tape recorder.

In tape recorders, etc., when switching between constant speed running of the tape in the forward and reverse directions, conventionally a drive source such as a solenoid was used to switch the rotation of the first and second reel stands. However, the mechanism is complicated, it takes time and effort to assemble, and there are disadvantages such as high cost and the need to integrate the entire device.

SUMMARY OF THE INVENTION The present invention aims to eliminate such inconveniences and to provide an apparatus for running a tape at a constant speed in forward and reverse directions with an inexpensive and simple configuration.

An embodiment of the present invention will be described below.

In the drawings of this embodiment shown in FIGS. 1 to 6, 1 indicates a small capstan.

The cap stan 1 is located approximately on the midline between a first reel stand and a second reel stand, which will be described later. The base plate 2 is attached by transmitting the rotational force of a motor 6 attached to the plate 5 via a motor pulley 7 and a belt 8, thereby rotating the cab stand and flywheel 4.

9 presses the pinch roller 14 against the capstan 1;
A pinch roller support plate serving as a separating control member, and guide shafts 10 implanted at four locations on the substrate 2.
A pinch roller lever 13 is pivotally attached to the pinch roller support plate 9 and is pivotable about a shaft 12. A pinch roller 14 is mounted on a shaft at the free end of the pinch roller lever 13, and is urged by a spring 15 so as to be pressed against the capstan 2.

16 is a head substrate having a magnetic head (reproduction head) 17, which is slid onto the guide shaft 10 through a long hole 18 in the same manner as the support plate 9 at the upper position of the pinch roller support plate 9. It is freely mounted and biased in the direction of arrow A by a spring 19.

Reference numeral 20 denotes a flywheel support plate that rotatably supports the flywheel 4, and is fixed to the base plate 2 via a shaft 21.

22 is a take-up reel stand, 23 is a rewind reel stand,
These reel stands 22 and 23 each have a shaft 2 fixed to the board 2.
4 and 25, and have blade-like portions 27 and 28 protruding from their local portions to engage with protrusions (not shown) of the glue pub of the cassette 26, respectively.

Furthermore, each of the shafts 24 and 25 has a slip pulley 29°3.
0 are loosely fitted so as to be rotatable, and these slip gooses IJ 29 and 30 are pressed by springs (not shown) so as to transmit the slip rotation to the take-up reel stands 22 and 23.

Furthermore, reference numerals 31 and 32 indicate a first idler and a second idler that are located on both sides of the capstan 1, and these idlers 31 and 32 are in pressure contact with the pulley 4T, respectively, and are connected to the pulley 47 and the winding 9. It is pivotably supported to be movable between the reel stand 22 and the unwind reel stand 29.

That is, idler levers 35 and 36 are rotatably pivoted to shafts 33 and 34 fixed to the base plate 2, respectively, and shafts 37 and 38 are fixed to the free ends of the idler levers 35 and 36, respectively.
Arms 39, 40 are rotatably pivoted to the arms 39, 40, and first idlers 31,
The second idler has 32 walls and a spring 41 as shown in FIG.
, 42, the shaft 43.44 is subjected to a rotational load due to
It is pivotally supported through.

Each idler lever 35, 36 is biased by a spring 45, 46 so as to press each idler 31, 32 against a pulley 47 of the capstan 1.

The third idler 48 provided between the take-up 9 reel stand 22 and the unwind reel stand 23 is also connected to the substrate 2.
An idler lever 50 is rotatably attached to a shaft 49 fixed to the shaft, and an arm 52 is attached to a shaft 51 at the free end of the idler lever 50.
The idler 48 is pivotally mounted to the free end of the arm 52 via a shaft 53 and under a rotational load by a spring 54.

The idler lever 50 is biased by a spring 56 so that the idler 48 is pressed against the first intermediate wheel 55.

The first intermediate wheel 55 and the second intermediate wheel 57 are rotatably supported via a shaft 60 at the free end of an intermediate lever 59 which is rotatably connected to a shaft 58 .

Reference numerals 61 and 62 indicate a first button and a second plunger, and these plungers t-61 and 62 are each rotatably supported at the center by shafts 63 and 64 fixed to the board 2, and each Plungers 65 and 66 are respectively engaged with one end of the plunger levers 61 and 62, and a pin 69 protruding from the other end of the first plunger lever 61 is engaged in a square hole 68 bored in the head base plate 16. A pin 61 protruding from the other end of the second plunger lever 62 is engaged across the long hole 70 of the pinch roller support plate 9 and the square hole 68.

Even if the first plunger lever 61 is biased counterclockwise by the spring 71 and the second plunger lever 62 is biased clockwise by the spring 12, the first plunger lever 61 side The leaf spring 73 is connected to the second intermediate wheel 5 in the operating state of the first plunger 65 shown in FIG.
7 in contact with the flywheel 4,
A portion thereof is in contact with a convex portion 59a formed integrally with the intermediate wheel lever 59.

Further, it is assumed that the intermediate wheel 5r is pressed against the flywheel 4 within the contact locus of the belt 8 and in a direction opposed to the side pressure applied by the belt 8 to the flywheel 4.

Incidentally, reference numerals 74 and 15 are guide portions provided on the side edges of the pinch roller support plate 9 and the head substrate 16, which control the rotation of the idler levers 35 and 36 when the pinch roller support plate 9 button and the head substrate 16 are moved. It regulates the contact and separation of the pulley 47 and each idler 31, 32.

That is, when the pinch roller support plate 9 and the head substrate 16 are pulled by the operation of the second plunger 66 during the tape constant speed running operation to be described later, each idler 31, 32
74.75 so that it is in contact with pulley 47.
However, if only the head substrate 16 is pulled by the operation of the first plunger 65 during fast forwarding and rewinding operations, each idler 3
1.32 and the pulley 47 are prevented from coming into contact with each other.

Next, each operation of the above configuration will be explained.

・Tape constant speed running operation When the second plunger 66 is operated, the second plunger lever 62 is rotated counterclockwise about the shaft 64 and against the spring 12, so that the pin 61 and the elongated hole are rotated. 70 and the square hole 68, the pinch roller support plate 9 and the head substrate 16 are slid in the direction opposite to the arrow A against the spring 19, resulting in the state shown in FIG. At the same time, the magnetic header 17 is brought into contact with the magnetic tape (not shown) of the cassette 26.

In this state, when the motor 6 is rotated clockwise at a constant speed, the flywheel button 4 and the capstan 1 are also rotated clockwise, so that the magnetic tape is run at a constant speed to the left in FIG.

Further, when the capstan 1 is rotated clockwise as described above, the pulley 4γ is also rotated clockwise, and the first idler 31 in contact with the pulley 4T is rotated counterclockwise. At this time, since the first idler 31 is given a rotational load by the spring 41, it comes into pressure contact with the slip pulley 29, and the take-up reel stand 22 is rotated clockwise. cassette 26
A magnetic tape is wound on a...pu (not shown).

When the pulley 41 is rotated clockwise, the second idler 32 is rotated counterclockwise, and the idler 32
Since the rotational load is applied by the spring 42, the shaft 44 is moved in the opposite direction to the slip pulley 30, and the shaft 44 is moved toward the substrate 2.
is held in the state shown in FIG. 6 by contacting a notch (not shown).

Next, when the motor 6 is rotated counterclockwise at a constant speed while the second plunger 66 is in operation, the flywheel 4, capstan 1, shark, and pulley 4T are also rotated counterclockwise. is traveling at a constant speed in the right direction in FIG.

Further, when the pulley 4γ is rotated counterclockwise, the second idler 32 is not rotated clockwise, and since the rotational load is applied by the spring 42, the idler 32 is rotated counterclockwise. The rewind reel stand 23 is rotated counterclockwise, and the magnetic tape of the cassette 26 is wound up.

Furthermore, when the pulley 47 is rotated counterclockwise, the first idler 31 is rotated clockwise and is moved in the opposite direction to the slip pulley 29 side because it is applied with a rotational load by the spring 41. The shaft 43 is brought into contact with a notch (not shown) in the substrate 2 and is held in the same manner as the second idler 32 described above.

When the operation of the second plunger 66 is released, the pinch roller support plate 9 and the head substrate 16 are moved in the direction of the arrow A by the springs 72.19, and thereby the first and second
The idlers 31 and 32 are separated from the pulley 47 and stopped.

- Rewinding operation When the first plunger 65 is operated, the head substrate 16 is moved in the direction opposite to the arrow A as shown in FIG. 2, and the second intermediate wheel 51 is pressed against the flywheel 4 by the spring 73.

When the motor 6 is rotated clockwise from this state,
The flywheel 4 is rotated clockwise, and the second intermediate wheel 57 is rotated counterclockwise.

In this way, when the second intermediate wheel 5T is rotated counterclockwise, the first intermediate wheel 55 is also rotated counterclockwise, and the third idler 48 is rotated clockwise and at the same time applies a rotational load. The spring 54 rotates so as to press against the rewind reel stand 23, thereby rotating the rewind reel stand 23 and winding the magnetic tape of the cassette 26 onto the hub.

-Fast forward operation When the motor 6 is rotated counterclockwise with the first plunger 65 in operation, the flywheel 4 is rotated counterclockwise and the second intermediate wheel 57 is rotated clockwise.

When the second intermediate wheel 57 is rotated clockwise, the first intermediate wheel 55 is also rotated clockwise, and at the same time, the third idler 48 is rotated clockwise, and at the same time, the spring 54 applying rotational load is rotated clockwise. For this reason, it is pressed against the take-up reel stand 22, and the take-up reel stand 22 is rotated clockwise, and the magnetic tape of the cassette 26 is wound onto the hub.

When the operation of the first plunger 65 is released, the head substrate 16 is moved back in the direction of arrow A by the spring 19, and the first plunger lever 61 is rotated counterclockwise by the spring 71, and the convex portion The pressing force of the spring 13 against the flywheel 50a also becomes smaller, and the second intermediate wheel 57 is separated from the flywheel 4 and comes to a stopped state.

In the above-mentioned fast forward and rewind states, the magnetic head 17
is brought into contact with the magnetic tape of the cassette 26, and is configured to determine whether or not recording is being performed on the magnetic tape while the tape is running.

Furthermore, when the stroke of the first plunger 65 is increased, the amount of movement of the head substrate 16 in the opposite direction to the arrow A also becomes larger.1 Therefore, the amount of insertion of the cassette of the magnetic head 17 also becomes larger, and the running load of the magnetic tape is also increased. However, at the same time, the pressing force of the second intermediate wheel 5γ against the flywheel 4 is also increased by the spring 73, and a large driving force is obtained.

As detailed above, according to the present invention, a rotational load is applied to the first and second idlers that are in pressure contact with the pulley rotated by the motor and transmit rotational force to the first and second reel stands. Therefore, just by switching the rotation direction of the motor,
Constant running of the tag in both forward and reverse directions is achieved, the mechanism is simple, and therefore a small device with low cost and simple assembly can be provided.

In addition, the control member that presses and separates the pinch roller from the capstan controls the pressure and separation of the first and second eyes 2 from the capstan pulley. Both idlers are kept in a neutral position away from both the capstan pulley and the reel stand, so they can be used during normal fast forwarding or rewinding or when the head is in contact with the tape. No unnecessary load is applied to the reel table during return, etc., and the tape can be fed smoothly at high speed.Moreover, this is a pinch roller control member that controls the first and second idlers. It can be easily realized because the operation control is also performed.

Furthermore, by applying a rotational load to the first and second idlers and switching the rotation direction of the cap stan, the first and second reel stands are rotated in the forward direction through the first idler 2 and the second idler, respectively. Since the configuration is configured to transmit rotation in the opposite direction, when switching the tape running direction, the rotation transmission to the first and second reel stands can be switched almost simultaneously.
There will be no slack in the magnetic tape, and there will be no tape separation from the guide, no protrusion from the cassette,
Problems such as changes in constant speed running between the button and the tip do not occur, and reliability can be significantly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view showing a tape running state in the forward direction in a tape constant speed running state, FIG. 2 is a side view of FIG. 1, and FIG. FIG. 4 is a plan view of main parts showing a fast-forward state, FIG. 5 is a side view showing an example of application of rotational load to the idler, and FIG. 6 is a tape constant-speed running state in the forward direction. FIG. 1...capstan, 2...curved board, 4...
... Flywheel, 5 ... Mounting is on board, 6...
...Motor, 7゜41...-y-v, S, curve, belt, 9...Pinch roller support plate, 10.
...Guide shaft, 11, 18.70...
Elongated hole, 13... Punch roller lever, 14...
...Pinch roller, 15, 19, 41, 42, 45
゜4&, 54shi 56, 71, 72, 73... Spring, 16... Head board, 11... Magnetic head, 2°... Flywheel Receiver plate, 22・
・Open take-up reel stand, 23...Rewind reel stand, 26...Cassette, 29.30...
Slip pulley, 31, 32° 48... Idler, 35, 36, 50... Idler lever, 3
9,40.52... Arm, 56.51...
...Intermediate wheel, 59...Intermediate wheel lever, 61゜62...Plunger lever, 65.66...Curved y" plunger, 6γ, 69...Pin, 68...
Curved hole, 74.75... Guide part.

Claims (1)

[Scope of utility model registration request] A 11th and 2nd reel stand rotated via a slip mechanism, a capstan button provided approximately on the midline of these reel stands to be rotated by a motor capable of forward and reverse rotation, and a capstan button directly connected to the capstan. Boorid, a pinch roller for running the tape at a constant speed, a control member for pressing the pinch roller against and separating it from the capstan, and a pivot movable between the pulley and the first and second reel stands. supported first and second idlers, and as the pinch roller is pressed against and separated from the capstan by movement of the control member, the first and second idlers are pressed against and separated from the pulley. The position of the first and second idlers is controlled by the control member so that the first and second idlers
A rotational load is applied to each of the second idlers, and when the pinch roller is pressed against the capstan and the first and second idlers are pressed against the pulley by moving the control member, the pulley rotates in the forward direction. is transmitted to the first reel stand via the first idler, and the reverse rotation of the pulley is transmitted to the second reel stand via the second idler, and the pinch roller is separated from the capstan by the control member. 1. A magnetic recording and reproducing apparatus, characterized in that the first and second idlers are separated from both the pulley and the first and second reel stands when the idler is in a closed state.