JP3518171B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a video tape recorder.
Recorder, digital audio tape recorder, etc.
To provide a mechanism that can greatly reduce the number of parts
The present invention relates to a magnetic recording / reproducing apparatus characterized by the above-mentioned. [0002] 2. Description of the Related Art FIG. 5 shows a video tape recorder (hereinafter referred to as a video tape recorder).
It is called VTR. Conventional magnetic recording / reproducing device used for
It is a top view showing the schematic structure of. Figure 6 shows when the cassette is installed
That is, the description at the start of the loading operation of the magnetic tape
FIG. First, referring to the drawings,
explain. In this figure, the capstan motor 1 is
It is a drive source for the take-up reel base 3 and the supply-side reel base 4.
The magnetic tape 5 has two tapes provided in the tape cassette 2.
Both ends are wound on a reel. And tape cassette
When the tape 2 is mounted on the VTR, the magnetic tape 5
And is wound around cylinder 6
Is completed. Reproduction or reverse reproduction of magnetic tape 5
Sometimes it is pinched between the capstan shaft 7 and the pinch roller 8.
From the capstan shaft 7 when rewinding or fast-forwarding.
The travel is performed with the pinch roller 8 separated. The running of the magnetic tape 5 is caused by this magnetic tape.
The capstan shaft 7, which is driven to rotate while holding the
In this case, the magnetic tape is used.
Mode 5 so that there is no slack or excessive tension
Back tension must be added. Such ba
In order to add a back tension to the magnetic tape 5,
Arm 9 is provided, and the supply side reel base 4 is wound.
A tension bar that acts as a braking member over a predetermined angle
And a first and a second holding portion.
Attached to the tension arm 9 via the members 12 and 13
I have. The back tension of the magnetic tape 5 begins to wind.
Must be uniform and moderate from to the end of the roll
However, such adjustment is performed by adjusting the position of the tension arm 9 or by adjusting the lead.
Adjustment of the contact force of the tension band 11 as a braking member
It can be done in a regular manner. Next, the actual back tension of the magnetic tape 5
The configuration of the option adjustment mechanism will be described with reference to FIG.
You. The tension arm 9 is press-fitted and fixed to the base 14.
One pin 15 is the center of rotation, and it is attached to be freely rotatable.
ing. Tens serving as a tension detecting member of the magnetic tape 5
The tension post 10 is beyond the turning radius of the tension arm 9.
It is arranged near the end and can slide freely on the running magnetic tape 5
It is fixed to. Also, the tension arm 9 has the first
One end of a tension coil spring 16 which is an urging member is held.
Have been. Therefore, in the tension arm 9,
When there is a restoring force of the tension coil spring 16
Indicates that a rotational couple acts in the direction of arrow A.
You. A tension van, which is a braking member of the supply-side reel base 4
The first and second holding members 12 and 13
While being held by the tension arm 9
And is wound around the outer periphery of the supply-side reel base 4.
You. The tension arm 9 has a tension
Rotational movement in the direction A until the slack of the band 11 disappears
Then, the rotation couple of the tension arm 9 described above was caught.
Since tension acts on the tension band 11, the supply side
Equivalent to the tension of the tension band 11 applied to the
A braking load is generated. Also, a tension coil as a first biasing member
The other end of the spring 16 is an elastic member rotatably disposed on the base 14.
And a tension coil spring
16 biasing forces can be adjusted. Also,
The follower 18 is formed integrally with the elastic force adjusting member 17.
And, as shown in the figure, a guide means for the elastic force adjusting member 17.
It is provided on a driving plate 19 slidably disposed on the base 14.
Driven by the engagement relationship between the guided portion 20 and the follower 18
The elastic force adjusting member 17 moves in the direction of arrow B according to the amount of movement of the plate 19.
Alternatively, it can be turned in the direction of arrow C.
You. [0008] The second pin 21 is press-fitted and fixed to the base 14.
And becomes the rotation center of the brake member 22. Second appendix
One end of a tension coil spring, which is a biasing member 23, is a brake unit.
Material 22 to reduce the restoring force of the tension coil spring.
Accordingly, the brake member 22 is rotated counterclockwise,
The tension band 11 wound around the supply side reel base 4
Supplied by being pressed against the pinch supply side reel base 4
A braking load is applied to the side reel base 4.
You. In addition, when there is no need for a braking load on the supply-side reel base 4,
In this case, the second brake unit is controlled by a regulating member (not shown).
The material 22 is separated from the supply-side reel base 4 and the braking load is
Does not act on the reel base 4. A conventional magnetic recording constructed as described above.
The detailed operation of the reproducing apparatus will be described with reference to FIGS.
I will explain. After the tape cassette 2 is mounted, the magnetic tape 5
During the loading operation, the driving plate 19 moves in the D direction.
The follower 18 slides on the guide 20 of the drive plate 19
And the elasticity of the tension coil spring 16
The force adjusting member 17 is rotated in the direction of arrow C,
The restoring force of the spring 16 is further increased, and
The arm 9 rotates in the direction of arrow A, and the tape cassette
The tension post 10 moves from the storage position in the
It comes into contact with the tape 5. Next, a recording or reproducing mode is set.
Then, the driving plate 19 is further moved by the driving means (not shown) to D
Direction, and the first biasing member is a pulling coil.
B direction until the restoring force of the spring 16 is adjusted to a predetermined value
The tension arm 9 is rotated by a predetermined rotation angle.
Force acts. Here, when the magnetic tape 5 runs,
To the tension post 10 according to the tension of the air tape 5
The contact force of the magnetic tape 5 changes, and the
The arm 9 is rotated according to the tension of the magnetic tape 5,
As a result, the tightening state of the tension band 11 changes.
Let me do. Now, when the tension of the magnetic tape 5 increases,
Since the tension arm 9 rotates clockwise, the tension
The tightening of the band 11 is loosened, and the reel base 4 is under braking.
The load is reduced, and the tension of the magnetic tape 5 decreases. This and
Conversely, when the tension of the magnetic tape 5 decreases, the tension
The contact force of the magnetic tape 5 against the post 10 is reduced.
From the tension by the restoring force of the tension coil spring 16
The arm 9 rotates counterclockwise, and the tension band 11
Tightens the reel base 4, and the braking load is applied to the reel base 4.
And the tension of the magnetic tape 5 increases.
The operation adjustment mechanism operates. In the tape cassette 2, the magnetic tape is
Release the brake inside the cassette provided to prevent slack
Cassette mounted on reel bases 3 and 4
As for the operation, when the cassette is
Magnetic tape unwinded by the sudden release of
The tape 5 goes out of the tape cassette and sags greatly.
5 drops from the height regulating member and then loads
No tape damage to the magnetic tape 5 during operation
During the cassette mounting operation, a restriction (not shown)
The member is separated from the brake member 22 and the brake member 2
2 is the restoration of the tension coil spring which is the second urging member 23.
The rotation couple balanced with the force causes the rotation of the brake member 22.
The moving radius portion is brought into contact with the reel base 4 and the inside of the tape cassette is
No braking is applied to the reel base 4 even if the brake is suddenly released.
Load is applied to maintain the tape tension when the cassette is mounted
Height restriction of magnetic tape 5 due to slack
Prevents falling from the material. In addition, since the cassette is mounted,
During the operation, that is, when the magnetic tape 5 is
Recording and playback from the position stored in the cassette
The tension post 10 is pulled out to the position where the line is possible.
Until the tape contacts the magnetic tape 5.
The reel band 4 is in a state of loosening, so the reel base 4 is braked.
The load cannot be applied. Therefore, with the loading operation,
Tension of magnetic tape 5 pulled out from tape cassette 2
Will be very low. Therefore, the loading behavior
During contact of the magnetic tape 5 with the cylinder 6 during operation
Then, the magnetic tape 5 drops from the regulating lead surface of the cylinder 6.
Or pulling out of the magnetic tape 5 during the loading operation
When the speed changes, the magnetic tape 5 sags, and the height
Dropping or sending near the completion of loading operation
Due to the inertia of the rotation of the reel base 4 by the magnetic tape 5
The magnetic tape 5 is too large and the magnetic tape 5 is slack
Damage to the magnetic tape 5 due to deviation from the running path
So-called tape damage occurred. For this reason, the cassette is mounted in the same manner as when the cassette is mounted.
Loading movement from loading
During operation, the regulating member (not shown) separates from the brake member 22.
The brake member 22 is a second biasing member 23
Due to the rotational couple balanced with the restoring force of the tension coil spring
The radius of rotation of the brake member 22 contacts the reel base 4
Then, a braking load is applied to the reel base 4 and the reel base 4 is pulled out.
By applying a predetermined tension to the magnetic tape 5 to be
From the control lead surface when the air tape 5 contacts the cylinder 6
Occurs when the magnetic tape 5 is pulled out or when the speed of pulling out the magnetic tape 5 changes.
If the magnetic tape 5 falls from the height regulating member or the reel base 4
Due to the magnetic tape 5 coming out too much due to the inertia of rotation
Prevents sagging. [0017] SUMMARY OF THE INVENTION A conventional magnetic recording medium having the above-described structure is used.
In a magnetic recording / reproducing apparatus, the
The speed of pulling out the magnetic tape during the loading operation
From the regulated lead surface due to changes or when the magnetic tape abuts the cylinder
Of magnetic tape near the end of loading or when loading is complete.
To prevent tape damage due to slack,
Brake components, i.e., brake arm, and rotating
A pin serving as a core, an elastic member spring for a predetermined braking force, and
Many parts such as regulating means for regulating the brake arm
Material is required, and the number of parts and assembly
There was a problem that the price as a product increased. Also, the point of application of the brake is a point on the reel base.
The contact state between the brake member and the reel
In the case of instability or friction between the brake member and the reel base
The braking load may vary widely due to variations in numbers, etc.
In some cases, an excessive braking load acts on the reel base.
As a result, when the tape tension is
May be high, contrary to tape sag
Tape damage due to loading of tape by tension
May occur or the operating load may become excessive.
Was a problem. Therefore, the present invention has the above conventional problems.
The number of parts has been greatly reduced.
It is extremely inexpensive,
Applying a stable reel base braking load during the
It can hold an appropriate tape tension.
Tape due to tape slack or excessive tension during loading
Magnetic recording and reproduction that can prevent damage
It is intended to provide a device. [0020] [MEANS FOR SOLVING THE PROBLEMS] To solve this problem
The present invention also relates to a reel for supplying or winding a magnetic tape.
Reel base and a reel base and wound at a predetermined angle, and
A tension band capable of braking the base and the tension
A first holding member for holding one end of the band;
A second holding member for holding the other end of the band and having a guide portion
The member and the first and second holding members are rotatably locked.
Tension detecting member that the magnetic tape slides when running
And a pivotable pivotally supported tension arm
And one end of the arm with the tension arm.
Adjust the tape tension during recording or playback to the desired value.
A second urging member and the other end of the urging member, and
A contact portion that can contact the guide portion of the holding member;
A control member capable of contacting or separating from the guide portion of the holding member,
The contact part of the control member can freely contact the guide part of the second holding member
The first position and the guide portion of the second holding member.
The second position is provided with guide means capable of being guided freely.
I do. [0021] According to the present invention having such features,
Without a dedicated brake member, it can be used for cassette mounting operation and magnetic
During the loading operation of the tape,
Control by the restoring force of the biasing member
The member presses and biases the second holding member, and the tension band
To the desired braking load on the reel base
It can be given while making. [0023] [0024] BEST MODE FOR CARRYING OUT THE INVENTIONThe magnetic recording / reproducing apparatus of the present invention
Pull out the magnetic tape in the tape cassette to record or
A magnetic recording / reproducing apparatus for reproducing, comprising supplying a magnetic tape
Alternatively, a reel base for winding and a predetermined
A tension wound at an angle and capable of braking the reel base.
And a second band for holding one end of the tension band.
1 holding member and the other end of the tension band
And a second holding member having a cam surface,
The magnetic tape is freely supported, and its magnetic tape is
A tension detecting member that is in sliding contact with the
A tensioner in which the first and second holding members are rotatably supported.
One end of the tension arm and the tension arm.
Tape tension during recording or playback of magnetic tape
Urging member that adjusts the pressure to a desired value, and the other end of the urging member
Is locked, and can contact the cam surface of the second holding member.
A rotatable elastic force adjusting member having a functional contact portion;
The contact portion of the elastic force adjusting member is connected to the cam surface of the second holding member.
A driving means for holding at a position separated from the
When a tape cassette is mounted and from the tape cassette
When loading the magnetic tape, the tension
The driving means in a state in which the detection member does not slide on the magnetic tape.
By releasing the holding state of the elastic force adjusting member due to
The elastic force adjusting member is rotated by the restoring force of the urging member.
And the contact portion contacts the cam surface of the second holding member.
Then, the second holding member is rotated, and the second holding member is rotated.
Due to the tension acting on the tension band due to the rotation of
The reel base is configured to apply a braking load.
And is characterized byLoading magnetic tape
During operation, that is, during rotation of the tension arm
Even without adding a dedicated brake member, the biasing member
Control by the resilience ofThe elastic holding member serves as the second holding member.
Press and biasApply a predetermined tension to the tension band,
Apply a braking load as necessary to the reel base,And the second security
By making the shape of the cam surface of the holding member appropriate,
When loading a cassette tape or loading a magnetic tape.
Optimum braking load is applied to the reel base during loading operation
It can be. [0025] Embodiments of the present invention will be described below with reference to the drawings.
The state will be described in detail with reference to FIGS. (Embodiment 1) FIG. 1 shows an embodiment of the present invention.
Plane showing the configuration of the main part of the magnetic recording / reproducing apparatus in the standby state
FIG. 2 illustrates the start of the loading operation.
It is a top view. The same parts as those in the conventional example are denoted by the same reference numerals.
I will explain. First, the overall configuration will be described. FIG.
, The capstan motor 1 is connected to the take-up reel base 3
It is a rotation drive source of the supply reel base 4. Magnetic tape 5
Are both ends on two reels provided on the tape cassette 2.
Has been wound. And tape cassette 2 is VTR
When the magnetic tape 5 is loaded into the
It is pulled out and wound around the cylinder 6. Magnetic tape 5
During playback or reverse playback, the capstan shaft 7 and pinch
And rewinding or fast-forwarding.
When the pinch roller 8 is separated from the pusher shaft 7, travel is stopped.
Is done. The running of the magnetic tape 5 is based on the magnetic tape.
The capstan shaft 7, which is driven to rotate while holding the
In this case, the magnetic tape is used.
Mode 5 so that there is no slack or excessive tension
Back tension must be added. The back tension is applied to the magnetic tape 5.
To add, a tension arm 9 is provided,
Braking section over a predetermined angle of the winding section of supply side reel base 4
The first and second tension bands 11 are provided.
2 are tensioned through both holding members 12 and 102.
Attached to the room 9. The back tension of the magnetic tape 5
Must be uniform and moderate from the beginning to the end
The adjustment must be made in the position of the tension arm 9
Adjustment and adjustment of the contact force of the tension band 11
I can do it. Next, the actual back tension adjusting mechanism
The configuration will be described with reference to FIG. tension
The arm 9 has a first pin 15 press-fitted and fixed to the base 14.
The center of rotation is attached so as to be freely rotatable. Tensi
Of the turning radius of the tension arm 9
Magnetic tape which is arranged near the part and runs depending on the rotation position
5 is slidably fixed to the base member 5. Also, tensioner
One end of a tension coil spring 16 as an urging member is
Is held. Therefore, in the tension arm 9,
When there is a restoring force of the tension coil spring 16
Indicates that a rotational couple is urged in the direction of arrow A.
You. Tension band 11 which is a braking member of reel base 4
Is held in the first holding member 12
The reel arm 4 is locked by the tension arm 9
The other end is held by the second holding member 13
It is locked by the tension arm 9 in the state of being closed. The tension band 11 is
Until the slack disappears, that is, the loading of the magnetic tape 5
A direction of the tension arm 9 up to the
To the rotation couple of the tension arm 9 described above.
The fished tension acts on the tension band 11
Therefore, the reel base 4 has a rotation braking action.
ing. Further, a tension coil spring 1 as an urging member
The other end of 6 is a control member rotatably disposed on the base 14.
Is engaged with the elastic force adjusting member 101 which is
The restoring force of the coil spring 16 can be adjusted.
You. The follower 18 is integrated with the elastic force adjusting member 101.
The elastic force adjustment which is formed and is a control member as shown in the figure
The driving plate 19 is a guide means for guiding the rotation position of the member 101.
The engagement relationship between the guide portion 20 and the follower 18
The elastic force adjusting member 101 is moved in accordance with the amount of movement of the drive plate 19.
So that it can be turned in the direction of arrow B or in the direction of arrow C.
Has become. In the present embodiment configured as described above,
FIGS. 1 and 2 show an operation example of a magnetic recording / reproducing apparatus according to the present invention.
2, 3 and 4 are also described. After the tape cassette 2 is loaded, the magnetic tape 5
During the loading operation, the driving means (not shown)
As a result, the drive plate 19 slides in the D direction, and the follower 18
The tension coil spring 1 is guided by the guide portion 20 of the moving plate 19.
6 restores the tension arm 9 to a rotational couple.
Is further rotated in the direction of arrow A, and
Move from the delivery position and load tension post 10
The magnetic tape 5 is brought into contact with the completed magnetic tape 5. Next, a recording or reproduction mode is set.
Then, the driving plate 19 is further moved to D by driving means (not shown).
Tension coil spring which is moved in the direction
B until the restoring force of No. 16 reaches the predetermined rotational position.
The elastic force adjusting member 101 in the direction
A predetermined rotation couple acts on the arm 9. Where the magnetic
When the tape 5 runs, it responds to the tension of the magnetic tape 5.
Contact of the magnetic tape 5 with the tension post 10
The force changes, which causes the tension arm 9 to move
It rotates according to the tension of the loop 5 and thus
The fastening state of the attachment band 11 changes. Now, when running in the recording or reproducing mode,
When the tension of the magnetic tape 5 increases, the tension arm 9
Is rotated clockwise, so that the tension band 1
1 is loosened and the braking force of the reel base 4 is reduced.
The tension of the magnetic tape 5 decreases. On the contrary, magnetic
When the tension of the tape 5 decreases, the tension post 10
Since the contact force of the magnetic tape 5 on the magnetic tape 5 decreases,
The tension arm 9 is counterclockwise due to the restoring force of the ill spring 16
The tension band 11 rotates the reel base 4
Tighten more, so that the tension of the magnetic tape 5 increases
As in the prior art, the tension adjustment mechanism is activated.
It has become. Here, in the present embodiment, FIG.
As shown in the figure, the magnetic
During the loading operation of the air tape 5, that is, tension
The post 10 is pulled from a position in the tape cassette (not shown).
Drawn out by the extraction means and brought into contact with the magnetic tape 5
Until the tension arm 9 rotates,
A driving plate 19 serving as a guiding unit is driven by a driving unit (not shown).
Driven in the E direction. The elastic force depends on the shape of the guide portion of the driving plate 19.
The follower 18 provided integrally with the adjustment member 101 is separated.
The elastic force adjusting member 101 is connected to the tension coil spring 16.
State that it can rotate to the position regulated by the restoring force of
And is urged to rotate in the direction of arrow F. The elastic force adjusting member 101 is provided integrally.
Pressed portion 104 serves as a guide portion for second holding member 102
It is regulated in the state where it is in contact with the cam surface 103, that is, in the first position.
It is. The tension arm 9 is an elastic member.
Is rotated in the direction A by the restoring force of the tension coil spring 16.
And continue rotating to the loading completed state.
You. Then, the elastic force adjusting member 101 is integrally formed.
The pressing portion 104 provided is a ten
Of the second holding member 102 for holding the cushion band 11
By pressing the cam surface 103 inside, the tension band
11 until the slack of the second holding member 102 disappears.
Is rotated in the direction of arrow G and the tension band 11 is slack.
The rotation is restricted when the error has disappeared. In the second holding member 102, the tension
The elastic force adjusting member 101 by the restoring force of the coil spring 16
The pressing force balanced with the rotational couple is applied to the second holding member 10.
2 is acted on the cam surface 103 which is a guide portion.
You. Further, in the second holding member 102, the
Pressing portion 104 of sex force adjusting member 101 and second holding member 1
02, the second holding unit
Pull in the direction of arrow G around the pivot point of the material 102
Rotational couple balanced by the restoring force of the spring 16 works
As a result, tension acts on the tension band 11.
Will be. Therefore, when the tape cassette is mounted,
Loading from cassette loading to loading completion
The tension post is applied to the magnetic tape 5 during the
While the tension bar is not in contact with the tension bar.
Since tension is applied to the reel,
A braking load will be applied. In particular, in the tension arm 9,
Since the end is locked, during the loading operation,
During the rotation of the tension arm 9, pulling
Since the locking portion of the coil spring 16 is also rotated,
The working length of the tension coil spring 16 is
9 changes according to the amount of rotation of the elastic force adjuster 9 described above.
The rotational couple of the material 101 is also changed. Therefore, the second holding member 102 and the elastic force adjustment
A cam surface 103 serving as a guide portion is provided on a contact surface with the adjusting member 101.
Is formed, and the pressing portion 104 of the elastic force adjusting member 101 and the second
Of the holding member 102 with the cam surface 103 which is the guide surface
By setting the relationship to the appropriate one,
During loading operation from the time of arrival until the completion of loading
Over the optimal tension band 11 as needed
Can be changed to the tension of
During loading operation until loading is completed.
To change the optimum braking load on the wheel base 4
be able to. (Embodiment 2) In the present invention,
In the second embodiment, as shown in FIG.
During the loading operation of the air tape 5, that is, tension
Until the post 10 contacts the magnetic tape 5
When the tension arm 9 is turned, a driving unit (not shown)
As a result, the driving plate 19 serving as a guiding means is driven in the H direction,
Adjustment of guide portion 20 of drive plate 19 and elastic force as control member
The follower 18 provided integrally with the member 101 is separated
It is. Therefore, the elastic force adjusting member 101 rotates.
Flexible first position, tension coil as biasing member
Due to the restoring force of the spring 16, the spring 16 is urged to rotate in the direction of arrow I.
That is, the elastic force adjusting member 101 is integrally provided.
With the pressed portion touching the tension band 11,
Is controlled. The tension arm 9 is a biasing member.
Rotated in the direction A by the restoring force of the tension coil spring 16
And the state is continuously shifted to the loading completed state. The elastic force adjusting member 101 has a biasing portion.
Another end of the tension coil spring 16 is stretched.
The spring force of the tension coil spring 16
It is rotated in the direction I by a rotating couple. And ammunition
Pressing portion 104 provided integrally with sex force adjusting member 101
Presses the tension band 11 wound on the reel base 4
Until the tension band 11 is no longer slack.
Then, the second holding member 13 rotates in the direction of arrow J and pulls
The elastic force adjusting member 101 by the restoring force of the coil spring 16
The pressing force balanced with the rotating couple is the tension band
11 Further, in the tension band 11,
Is the tension band 11 by the applied pressing force.
Until the slack disappears, the pivotal support of the second holding member 13
Is turned around the point in the direction of arrow J and tension band 1
When the slack of 1 disappears, the tension band 11 becomes elastic.
The tension corresponding to the rotation couple of the force adjusting member 101 is directly
Used. Therefore, loading
During the operation, tension post 1
Tension band while 0 is not in contact
Since a direct tension is applied to 10, the reel base
4 is provided with a braking load. According to the present embodiment configured as described above,
If you don't add a dedicated brake
Loading operation from loading to completion of loading
Applies a stable and optimal braking load to the reel base even in the middle
Tape slack and load
The magnetic tape's cylinder regulation lead surface during the
Speed of pulling out magnetic tape when dropping or loading
From the height regulating member and loading
Caused by the inertia of the reel base rotation near the completion of
Prevents slack due to too much magnetic tape
Optimal as needed during loading operation
Tape tension, causing tape damage.
Can be prevented. Also, according to the present embodiment, a dedicated shake
Without adding additional parts
Even during loading operation until loading is completed,
Can apply a braking load to the
Tape slack or magnetic tape during loading
When dropping from the cylinder regulation lead surface or when loading
From the height regulating member when the pull-out speed of the air tape changes
Rotation of the reel base near the
Rolling out of magnetic tape caused by inertia of rolling
Can be prevented. Therefore, in this type of conventional apparatus,
Control the reel base when loading a cassette or during loading.
Dedicated brake structure needed to add power
Components: brake arm, pivot pin, location
The elastic member spring for constant braking force and the brake arm
Many members such as regulating means for regulating operation can be eliminated,
Dramatic reduction in the number of parts is possible, resulting in a reduction in component parts
The number of assembling steps has been reduced, and the cost has been significantly reduced.
Reduction is achieved. In addition, a conventional dedicated brake member is used.
In comparison, with a band brake that also serves as a tension band
And acts over the winding angle of the tension band.
Pressure is applied to apply a braking load.
Compared to block-type brake with contact or partial pressing
That stable braking load with little variation can be expected
There are advantages. In addition, the conventional dedicated brake member
In comparison, the contact pressure of the contact part on the reel
The life is relatively low
Has the advantage that the reliability of
You. [0058] As described above, the magnetic recording reproduction of the present invention
According to the raw equipment, when the cassette is loaded or loading is completed
During the loading operation of the
The cassette unit can be loaded by
Tape slack when loading or magnetic tape during loading
Dropping or loading from the cylinder's cylinder lead
Control section when the magnetic tape withdrawal speed changes
Reel near dropping material and completion of loading operation
Excessive magnetic tape caused by the inertia of the table rotation
Prevents sagging and causes tape damage
Can be prevented. [0059]And the present invention is compared with this type of conventional device.
Compared to a tape while recording or reproducing on a magnetic tape
The restoring force of the biasing member that adjusts the tension to a desired value
When the tape cassette is mounted and the tape cassette
Tension band when loading to pull out the tape
To apply a braking load to the reel base
The special brake member is not required
Therefore, the number of parts can be reduced, and
Less assembly man-hours, and ultimately lower costs
It is. In addition, the conventional dedicated brake member
In comparison, with a band brake that also serves as a tension arm
Over the winding angle of the tension band.
To apply a braking load with the applied pressure.
Stable braking force compared to block type brake
It can be expected, and during the loading operation,
Is pulled out with stable tape tension
Tape damage due to tension can be prevented. In addition, a conventional dedicated brake member is used.
In comparison, the contact pressure of the contact part on the reel
Life is relatively low
Has the advantage that the reliability of
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a magnetic recording / reproducing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a plan view showing a start of a loading operation in Embodiment 1. FIG. FIG. 4 is a plan view of a magnetic recording / reproducing apparatus according to Embodiment 2; FIG. 4 is a plan view showing a start of a loading operation in Embodiment 3 of the present invention; FIG. 5 is a plan view showing a schematic configuration of a conventional magnetic recording / reproducing apparatus; FIG. 6 is a plan view showing a conventional configuration at the start of a loading operation. [Description of References] 1 Capstan motor 2 Tape cassette 3 Take-up reel base 4 Supply-side reel base 5 Magnetic tape 6 Cylinder 7 Capstan shaft 8 Pinch roller 9 Tension arm 10 Tension post 11 Tension band 12 First holding member 13 Second holding member 14 Base 15 First pin 16 Tension coil spring 17 Elastic Sexual force adjusting member 18 Follower 19 Drive plate 20 Guide portion 21 Second pin 22 Brake member 23 Second urging member 101 Elastic force adjusting member 102 Second holding member 103 Cam surface 104 Pressing portion

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuki Tanabe 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-220251 (JP, A) JP-A-7- 29253 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 15/43

Claims (1)

(57) [Claims] [Claim 1] Pull out the magnetic tape in the tape cassette
A magnetic recording / reproducing apparatus for recording or reproducing data , comprising: a reel base for supplying or winding a magnetic tape; a tension band wound around the reel base at a predetermined angle and capable of braking the reel base; A first holding member that holds one end of the band; a second holding member that holds the other end of the tension band and has a cam surface ; Sometimes
A tension detecting member that slides on the magnetic tape,
The first and second holding members are rotatably supported.
The tension arm has one end locked to the tension arm, and adjusts the tape tension during recording or reproduction of the magnetic tape to a desired value.
A biasing member having an abutting portion, the other end of the biasing member being locked , and a contact portion capable of contacting a cam surface of the second holding member.
A force adjusting member and an abutting portion of the elastic force adjusting member are attached to the force of the second holding member.
A drive means for holding the tape cassette at a position separated from the tape surface when the tape cassette is mounted and the tape cassette.
When loading the magnetic tape from the
Drive in the non-sliding state of the magnetic detection member to the magnetic tape
Releasing the holding state of the elastic force adjusting member by means
As a result, the elastic force adjusting member is rotated by the restoring force of the urging member.
And the contact portion contacts the cam surface of the second holding member.
The second holding member is rotated in contact with the second holding member,
Due to the tension acting on the tension band due to the rotation of the material.
And a braking load is applied to the reel base.
Magnetic recording and reproducing apparatus, characterized in that.