JPH04271051A - Tape recorder - Google Patents

Abstract

PURPOSE:To prevent a control mechanism system controlling a tape guiding mechanism from wearing and deforming and simultaneously to reduce consumed power. CONSTITUTION:A loading locking lever 45 bearing the counter force exerted on a loading lever 42 instead of a mode switching cam 44 by press-fixing sliding bases 35a, 35b to guiding catchers 38a, 38b is provided to stabilize the running path of a tape after tape loading is finished.

Description

[Detailed description of the invention]

[Object of the invention]

0002

[Industrial Application Field] The present invention is a compact cassette
tape recorder, VTR (video tape recorder),
The present invention relates to a tape recorder device such as a DAT (digital audio tape recorder).

0003

[Background Art] In recent years, tape recorder devices that record and play back signals using audio/visual video cassettes have become popular, and recently tape recorders that can record and play back digital signals using DAT cassettes have become popular. The device has also been commercialized.

[0004] In such a tape recorder device,
The tape in the DAT cassette is pulled out from within the DAT cassette by a tape guide mechanism, and is wound around a rotating head drum at a predetermined angle before signal recording/reproduction is performed. At this time, highly accurate positioning of the tape with respect to the rotating head drum is required, so the tape guide mechanism is pressed against the guide catcher with a relatively large force along the tape pulling direction using the force of a spring, etc. to control the tape tension. We try to deal with fluctuations and external vibrations.

The operation of the tape guide mechanism is controlled by a control mechanism system comprising a loading lever, a mode switching cam, and the like. FIG. 8 is a plan view showing the configuration of this control mechanism system. In the figure, 101 is a loading lever that drives the tape guide mechanism 102 by meshing with a loading gear 103 of the tape guide mechanism 102, and this loading lever 101 rotates around a shaft 104. Further, 105 is a mode switching cam rotationally driven by a drive motor (not shown). This mode switching cam 105 is provided with a cam groove 106 corresponding to at least the loading lever 101, and a guide shaft 107 protruding from the loading lever 101 is engaged with this cam groove 106 to rotate the loading lever 101. It is supposed to be done.

On the other hand, the tape guide mechanism 102 is pressed against a guide catcher 111 by the force of a spring 110 when the tape 108 is wound around the circumferential surface of the rotary head drum 109, thereby stabilizing the tape running path. There is.

However, in the above state, the spring 110
acts to press the tape guide mechanism 102 against the guide catcher 111, and at the same time, the force acts as a reaction force that rotates the loading lever 101 in the opposite direction. On the other hand, the cam groove 106 corresponding to the mode switching area after loading (switching between tape fast forward/rewind and stop mode and recording/playback mode) is located in the mode switching cam 105.
Since they are formed at equal distances from the center of rotation,
The aforementioned reaction force is received by the end face of this cam groove 106.

Therefore, each time the mode is switched, friction is generated on the end surface of the cam groove 106 due to the reaction force, and one concern is that this friction may cause the end surface of the cam groove 106 to wear out and cause abnormal operation. It had been.

[0009]Furthermore, there are some economic disadvantages, such as the need to increase the torque of the drive motor to compensate for the reaction force received by the mode switching cam 105.

0010

[Problems to be Solved by the Invention] As described above, in conventional tape recorder devices, the reaction force from the tape guide mechanism may cause wear or deformation of the control mechanism such as the mode switching cam, causing abnormal operation. Moreover, because the reaction force acts in the direction opposite to the rotation of the drive motor, extra power is consumed by the motor.

The present invention is intended to solve these problems, and has a simple structure that prevents wear and deformation of the control mechanism that controls the tape guide mechanism, and also reduces power consumption. The purpose is to provide a tape recorder device that can

[Configuration of the invention]

[0013]

[Means for Solving the Problems] In order to achieve the above object, the tape recorder device of the present invention includes a rotary head for recording and reproducing signals on and from a tape stored in a tape cassette, and a rotating head for recording and reproducing signals from a tape stored in a tape cassette. a tape guide mechanism that is pulled out to a position where it contacts the rotating head to form a predetermined tape running path; a guide catcher that regulates the end position of the tape guide mechanism in the tape pull-out direction; a guide pressing means for pressing the catcher; a control mechanical system for controlling the tape guide mechanism; and a reaction force bearing mechanism for bearing the reaction force caused by the tape guide mechanism pressing the guide catcher in place of the control mechanical system. Equipped with:

[0014]

[Function] In the tape recorder device of the present invention, the reaction force bearing mechanism is used to bear the reaction force caused by pressing the guide catcher of the tape guide mechanism instead of the control mechanism system. It is possible to prevent wear and deformation of the mechanism due to exposure, and to reduce power consumption.

[0015]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the configuration of a tape recorder device according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In each figure, 1 indicates the main chassis. On this main chassis 1, there is a rotary head drum 3 for recording and reproducing digital signals on a tape 2 housed in a DAT cassette (not shown), a capstan shaft 4, two guide rollers 5A, 5B and a tape guide mechanism equipped with various roller groups that pull out the tape 2 from the DAT cassette to a position where it contacts the peripheral surface of the rotary head drum 3 at a predetermined angle and length, and then maintain the running path of the tape 2. Each is supported.

The tape guide mechanism is roughly divided into first and second movable mechanical sections, and a control mechanism section that controls each of these movable mechanical sections.

The first movable mechanical section has a pinch roller 6 attached to the capstan shaft 4 at one end, and a pinch roller support lever 8 rotatable about a shaft 7 fixed to the main chassis 1; A pinch roller press lever 10 is rotatable about a shaft 7 and applies pressurization in the direction of arrow A1 to the pinch roller support lever 8 by the force of a coil spring (not shown), and a guide roller 11 is provided at one end. It also includes a guide roller support lever 13 that rotates around a shaft 12 fixed to the main chassis 1 as the pinch roller support lever 8 rotates.

In this first movable mechanical section, a guide shaft 10a is attached to one end of the pinch roller pressurizing lever 10.
is fixed. This guide shaft 10a engages with a cam groove 22a of a control slider 22 that is supported on a mechanical chassis (not shown) so as to be slidable in the directions of arrows B1 and B2. As a result, the pinch roller pressurizing lever 10 is rotated about the shaft 7 by movement of the control slider 22.

The second movable mechanical section includes a pair of loading gears 31A that mesh with each other on the back side of the main chassis 1.
, 31B at one end thereof, and are slidable along guide grooves 1A, 1B provided in the main chassis 1, and have guide rollers 33A, 33B and an inclined guide pin on the surface. Slide base 3 equipped with 34A and 34B
5A, 35B, and loading links 36A, 36B that respectively connect loading arms 32A, 32B and slide bases 35A, 35B.

[0020] Also, the above-mentioned loading gears 31A, 31
Spring 37A, 37B is locked between B and loading arm 32A, 32B, respectively. Each spring 37
The forces A and 37B are transmitted to the slide bases 35A and 35B via the loading arms 32A and 32B and the loading links 36A and 36B in the state where tape loading is finished, so that the slide bases 35A and 35B are attached to the main chassis 1. It is positioned by being elastically pressed against guide catchers 38A and 38B fixed above.

[0021] Also, the pair of loading gears 31A
, 31B, a gear of a loading lever 42 rotatably supported around a shaft 41 is meshed with one (31B) of the loading lever 42, as shown in detail in FIG. This loading lever 42 and the control slider 22
are adapted to rotate and slide, respectively, by a mode switching cam 44 rotatably supported around a shaft 43.

That is, the mode switching cam 44 is provided with cam grooves 44a and 44b corresponding to the loading lever 42 and the control slider 22, respectively. Each guide shaft 42a, 22b is engaged with each other.

[0023] Also, near this mode switching cam 44,
A loading lock lever 45 is arranged to lock the loading lever 42 in the rotational position after loading is completed. This loading lock lever 45 is rotatable around a shaft 46 fixed to the main chassis 1, and is always urged in the direction of arrow D1 by the force of a spring 47. The rotational position of the loading lock lever 45 is controlled by the engagement between a first protrusion 45a provided on the loading lock lever 45 and a wall portion 44c protruding from the mode switching cam 44. The second protrusion 45b provided on the loading lock lever 45 comes into contact with the end face of the opening 1C opened in the loading lock lever 45, thereby regulating the load.

Note that the mode switching cam 44 is connected to a connecting gear,
It is rotationally driven by a motor (not shown) through a driving force transmission means (not shown) such as a worm gear.

Furthermore, although not shown, a reel motor base on which two reel motors are mounted is fixed between the main chassis 1 and a mechanical chassis (not shown). Each reel motor has a tape supply reel 50 and a tape take-up reel 5 connected to each other via a reel rotation support shaft.
1 is installed.

Further, 60 is a reel brake mechanism for applying braking force to each reel 50, 51. This reel brake mechanism 60 includes reel brake arms 63 and 64, each having rubber pads 61 and 62 at one end thereof, which come into contact with the circumferential surface of the reel stand of each reel 50 and 51, and rubber pads 61 and 62 placed evenly on each reel stand. A brake spring 65 for applying a biasing force to each reel brake arm 63, 64 to press the reel with a strong force, and a brake spring 65 for turning on/off the supply of braking force to each reel 50, 51 by this reel brake mechanism 60.
It is composed of a brake switching lever 66 that switches off/off, and a solenoid 68 that is a drive source for rotating the brake switching lever 66 around a shaft 67.

Furthermore, 70 is for signal recording on the tape 2.
A tension detection arm for detecting the tension of the tape 2 on the tape running path during playback is shown. This tension detection arm 70 is attached to the main chassis 1
It is rotatably supported by a rotating shaft 71 supported by. A tension pole 72 that is in pressure contact with the surface of the tape 2 is rotatably supported at one end of the tension detection arm 71. On the other hand, the other end of a tension spring 73 whose one end is fixed is locked to the other end of the tension detection arm 70.
0 is always biased with a constant force in the direction of arrow C1. The tension detection arm 70 is turned on and off by a control pin 23 protruding from the control slider 22.

Next, the operation of this tape recorder device is shown in FIG.
This will be explained using FIGS. 3 to 5. Note that Figure 1 shows the state of the tape recorder device during signal recording and playback, Figure 3 shows the state before tape loading, Figure 4 shows the state with a DAT cassette installed, and Figure 5 shows the state when the tape is stopped and when the tape is fast-forwarding or rewinding. are shown respectively.

First, as shown in FIG. 4, when the DAT cassette 80 is installed in the tape recorder device, the guide rollers 33A on each slide base 35A, 35B
, 33B and the inclined guide pins 34A, 34B, the pinch roller 6, and the guide roller 11 are all located within the DAT cassette 80.

Thereafter, when the mode switching cam 44 is rotated in the direction of arrow E1 by the drive of a motor (not shown), the loading lever 42 is rotated in the direction of arrow F1, and the loading gears 31A and 31B rotate while meshing with each other. As a result, the slide bases 35A and 35B can move the guide catcher 38A along the guide grooves 1A and 1B, respectively.
, 38B.

Also, in parallel with this operation, the control slider 2
2 moves in the direction of arrow B1, and as a result, the pinch roller support lever 8 rotates in the direction of arrow A1, and the pinch roller 6 moves in the direction of arrow A1.
reaches a position just before being pressed against the capstan shaft 4 with the tape 2 in between.

As a result, as shown in FIG. 5, the tape 2 is wound around the circumferential surface of the rotary head drum 3 at a predetermined angle and length, and the running path of the tape 2 is changed from the tape supply reel 50 side to the guide roller. 5B, slide base 3
Guide roller 33B and inclined guide pin 34 on 5B
B, formed by the inclined guide pin 33A on the slide base 35A, the guide roller 34A, the guide roller 5A, the capstan shaft 4, and the guide roller 11.

At this time, the slide bases 35A, 35B are moved by the force of the springs 37A, 37B to the guide catcher 38.
A and 38B are elastically pressed against each other, and the loading lever 42 receives a rotational force in the opposite direction (direction of arrow F2) due to the reaction force. However, at this time, since the loading lock lever 45 comes into contact with one end of the loading lever 42, the reaction force applied to the loading lever 42 is substantially received by the main chassis 1 via the loading lock lever 45. .

[0034] After that, when a signal recording/reproducing instruction is given,
As shown in FIG. 1, the mode switching cam 44 is further moved by arrow E.
It is rotated by a predetermined angle in one direction. As a result, the loading lever 42 also rotates by a predetermined angle in the direction of arrow F1, and the rotation is transmitted to the loading gears 31A and 31B. here,
Since the movement of the slide bases 35A, 35B in the tape pulling direction is already regulated by the guide catchers 38A, 38B, the rotation of the loading gears 31A, 31B only works to increase the pressing force by the springs 37A, 37B. As a result, slide base 35A, 3
5B is stably positioned on the guide catchers 38A and 38B.

Therefore, the reaction force applied to the loading lever 42 also becomes stronger, but since the loading lock lever 45 is in contact with one end of the loading lever 42 at this time, the reaction force is ultimately applied to the main chassis 1. I will receive it.

On the other hand, due to the rotation of the mode switching cam 44,
The control slider 22 also moves further in the direction of arrow B1. Then, the tension detection arm 70 rotates in the direction of arrow C1 by engagement with the control pin 23 provided on the control slider 22, and as a result, the tension pole 72 on the tension detection arm 70 is pressed against the surface of the tape 2. The tension servo function starts operating.

Thereafter, by rotating the tape supply reel 50, the tape take-up reel 51, and the capstan shaft 4, the tape starts running at a constant speed, and signals are recorded and reproduced on the tape 2. In addition,
During this time, the tension of the tape 2 is detected by the tension detection arm 70, and a braking force corresponding to the detected tension is applied to the tape supply reel 50, thereby performing servo control of the tape tension.

Thereafter, when an instruction is given to fast forward or reverse the tape, the mode switching cam 44 rotates in the reverse direction toward the rotational position at which it stopped. As a result, the state returns to that shown in FIG. 5, and the pinch roller 6 and the tension pole 72 are released from contact with the capstan shaft 4 and the tape 2, respectively. However, the state of contact between the loading lever 42 and the loading lock lever 45 is maintained as before.

FIG. 6 shows the relationship between the rotation angle of the loading lever 42 and the rotation angle of the loading lock lever 45 in this embodiment. In this figure, the left rotation direction is taken as positive. As shown in the figure, in this tape recorder device, the lock is activated from the time when the loading lock lever 45 has rotated beyond one peak from the start of tape loading, and the timing at which this lock begins to function is immediately before the end of tape loading. .

Thus, in the tape recorder device of this embodiment, in each mode after tape loading, the reaction force applied to the loading lever 42 is received by the main chassis 1 via the loading lock lever 45. It is possible to prevent wear and deformation caused by force being applied to other mechanisms (for example, the mode switching cam 44), and it is also possible to prevent excess load from being applied to the drive motor.

FIG. 7 shows the mode switching cam 4 in this embodiment.
FIG. 4 is a diagram showing the results of comparing the drive load applied to No. 4 with the conventional case. As is clear from this figure, conventionally,
In addition to the load during tape loading, the load from the loading lever 42 was applied to the mode switching cam 44 even after tape loading was completed, but in this embodiment, the load from the loading lever 4 is applied after tape loading is completed.
No load from 2 is applied to the mode switching cam 44. Therefore, the peak value of the load applied to the mode switching cam 44 together with the load from the control slider 22 is significantly reduced.
Furthermore, the overall total load can be significantly reduced.

In the above embodiments, a tape recorder using a DAT cassette has been described, but the present invention can also be applied to a tape recorder using a videotape.

[0043]

As explained above, according to the tape recorder device of the present invention, the reaction force bearing mechanism bears the reaction force caused by the pressure on the guide catcher of the tape guide mechanism instead of the control mechanical system. It is possible to prevent wear and deformation of the mechanism due to reaction force being received by the control mechanism system, and to reduce power consumption.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a state during signal recording and reproduction in a tape recorder device according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of a part of FIG. 1;

FIG. 3 is a plan view showing a state before tape loading in the tape recorder device of FIG. 1;

4 is a plan view showing a state in which a DAT cassette is attached to the tape recorder device of FIG. 1; FIG.

5 is a plan view showing the state of the tape recorder device of FIG. 1 when the tape is stopped and when the tape is fast forwarded or rewound; FIG.

FIG. 6 is a diagram showing the relationship between the rotation angle of the loading lever and the rotation angle of the loading lock lever.

FIG. 7 is a diagram showing the results of comparing the drive load applied to the mode switching cam with the conventional one.

FIG. 8 is a plan view showing the configuration of a control mechanism system in a conventional tape recorder device.

[Explanation of symbols]

2...Tape 3...Rotating head drum 31A, 31B...Loading gear 32A, 32B...Loading arm 35A, 35B
...Slide base 36A, 36B...Loading link 37A, 37B
...Springs 38A, 38B...Guide catcher 42...Loading lever 44...Mode switching cam 45...Loading lock lever 80...DAT cassette

Claims (1)

[Claims] 1. A rotating head for recording and reproducing signals on a tape stored in a tape cassette, and a tape guide for drawing out the tape from the tape cassette to a position where it contacts the rotating head to form a predetermined tape running path. a mechanism, a guide catcher for regulating the end position of movement of the tape guide mechanism in the tape withdrawal direction, a guide pressing means for pressing the tape guide mechanism against the guide catcher, and a control mechanism system for controlling the tape guide mechanism. A tape recorder apparatus comprising: a reaction force bearing mechanism that bears the reaction force caused by the tape guide mechanism pressing the guide catcher in place of the control mechanical system.