JP2627465B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a magnetic recording / reproducing apparatus having a mechanism for moving a slide chassis relative to a main chassis.

[0002]

2. Description of the Related Art FIG. 24 is a plan view of a slide chassis of a conventional magnetic recording / reproducing apparatus. This magnetic recording / reproducing apparatus is provided in a camera-integrated video or the like.

[0003] On the back side of the slide chassis 1, loading arms 3a, 3b are mounted so as to be rotatable about rotation shafts 5a, 5b. Parts such as a relay arm and a guide base connected to the loading arm are omitted.

[0004] The slide chassis 1 is provided with slide chassis guide grooves 43a, 43b, 43c and 43d. Slide chassis guide grooves 43a, 43b, 4
Guide pins attached to a main chassis 51, which will be described later, are fitted into 3c and 43d, so that the slide chassis 1 can slide in the directions of arrows A and B. Also, on the slide chassis 1,
The spring hook 41 is fixed.

FIG. 25 is a plan view of a main chassis of a conventional magnetic recording / reproducing apparatus.

A loading motor 93, intermediate gears 96a to 96e, and a main cam 53 are rotatably mounted on the main chassis 51. 55 is the main cam 53
It is a rotation axis. The driving force of the loading motor 93 is
The power is transmitted to the main cam 53 via the intermediate gears 96a to 96e.

A slide chassis driving lever 59 is mounted on the main chassis 51 so as to be rotatable about a rotation shaft 61. Slide chassis drive lever 59
Are arranged on the main cam 53, and the cam pins 63 provided on the slide chassis drive lever 59 are connected to the slide chassis drive grooves 5 provided on the main cam 53.
7 is fitted.

A slide chassis drive pin 65 provided on a slide chassis drive lever 59 is fitted into a groove 56 provided on the spring hook 41 on the slide chassis 1 (see FIG. 24). Main cam 5
By the rotation of 3, the cam pin 63 drives the slide chassis driving lever 59 in the directions of arrows C and D, whereby the slide chassis 1 (see FIG. 24) slides in the directions of arrows A and B.

On the main chassis 51, a loading lever 101 is arranged. Loading lever 1
01 in the loading lever guide groove 50 provided in
By fitting the guide pins 52 mounted on the main chassis 51, the loading lever 101 is slidable in the directions of arrows A and B. A cam pin 66 provided on the loading lever 101 is fitted into a loading lever driving groove 60 provided on the main cam 53. Therefore, the rotation of the main cam 53 causes the loading lever 101 to slide in the directions of arrows A and B.

On the main chassis 51, a pinch pressure lever 71 is rotatably mounted. The magnetic tape is pulled by a pinch roller (not shown), and the magnetic tape is pressed against a capstan (not shown) attached to the capstan motor 75. The pinch roller is driven by the pinch pressure lever 71. This is performed using rotation. On the main chassis 51, a pinch roller pressing cam 70 and intermediate gears 78a and 78b are rotatably mounted. The rotational force of the main cam 53 is
b, 78a, and transmitted to the pinch pressing lever 71 through the pinch roller pressing cam 70, whereby the pinch pressing lever 71 rotates. In the figure, reference numeral 77 denotes a drum.

[0011]

The weight of a camera-integrated video or the like has been reduced so that a user can easily carry it. Therefore, it is necessary to make the magnetic recording / reproducing device provided in the camera-integrated video or the like as light as possible.

[0012]

The present invention has been made to solve such a conventional problem. SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic recording / reproducing apparatus which can be used both as a drive mechanism for a slide chassis and a drive mechanism for a pinch roller, and can be reduced in weight.

[0014]

SUMMARY OF THE INVENTION The present invention provides a cam for moving a slide chassis relative to a main chassis, a slide chassis driving lever connected to the cam and the slide chassis and driven by rotation of the cam. ,
A link rod connected to the cam and driven by rotation of the cam, and a pinch roller driven by the link rod and pressed against the capstan shaft are provided.

[0015]

In the magnetic recording / reproducing apparatus according to the present invention, the rotation of the cam drives the slide chassis driving lever connected to the cam and the slide chassis, so that the slide chassis moves relative to the main chassis. At the same time, the link rod connected to the cam is driven. The pinch roller is driven by the driven link rod, and is pressed against the capstan shaft. Therefore, the drive mechanism of the slide chassis and the drive mechanism of the pinch roller can be shared by one cam, and there is no need to separately provide the drive mechanism of the slide chassis and the drive mechanism of the pinch roller. Therefore, the number of components used for the drive mechanism of the slide chassis and the drive mechanism of the pinch roller can be reduced, and the weight of the magnetic recording / reproducing apparatus can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a magnetic recording / reproducing apparatus according to the present invention will be described below. FIG. 2 is a plan view of a slide chassis of one embodiment of the magnetic recording / reproducing apparatus according to the present invention.

On the back side of the slide chassis 1, loading arms 3a and 3b are attached so as to be rotatable about rotation shafts 5a and 5b. On the slide chassis 1, slide guide rails 20a and 20b are slidably mounted in the directions of arrows A and B.
FIG. 8 is a plan view of the slide guide rail 20b,
FIG. 9 is a plan view of the slide guide rail 20a.
A guide pin 44a provided on the slide chassis 1 is fitted into a slide guide rail guide groove 45a provided on the slide guide rail 20a. A guide piece 48 provided on the slide chassis 1 is arranged on a guide portion 46 provided on the slide guide rail 20a. These structures allow the slide guide rail 20a to slide. One end of the slide guide rail biasing spring 8a is connected to a guide piece 48.
And the other end is a slide guide rail 2
0a. The slide guide rail 20a is urged in the B direction by the slide guide rail urging spring 8a.

A guide pin 44b provided on the slide chassis 1 is fitted into a slide guide rail guide groove 45b provided on the slide guide rail 20b. Thus, the slide guide rail 20b can be slid. One end of the slide guide rail biasing spring 8b is attached to the slide chassis 1, and the other end is attached to the slide guide rail 20b. The slide guide rail 20b is also urged in the B direction by the slide guide rail urging spring 8b.

A third relay arm 7a is rotatably mounted on one end of the loading arm 3a, and a first relay arm 9a and a second relay arm 11a are rotatable on the third relay arm 7a. Attached to. A first guide base 13a slidably disposed in a first guide base guide groove 47a provided on the slide guide rail 20a is attached to the first relay arm 9a. A first guide roller 17a and an inclined guide 21 are attached to the first guide base 13a.

The second relay arm 11a has a second guide base 1 slidably disposed in a second guide base guide groove 49a provided on the slide guide rail 20a.
5a is attached. The second guide roller 19a is attached to the second guide base 15a.

The slide guide rail 20b side has the same structure, the third relay arm 7b corresponds to the third relay arm 7a, the first relay arm 9b corresponds to the first relay arm 9a, and the second relay arm 9b corresponds to the second relay arm 9a. The relay arm 11b corresponds to the second relay arm 11a, the first guide base 13b corresponds to the first guide base 13a, and the second guide base 15b corresponds to the second
The first guide roller 17b corresponds to the guide base 15a.
Corresponds to the first guide roller 17a, the second guide roller 19b corresponds to the second guide roller 19a, and the first guide base guide groove 47b corresponds to the first guide base guide groove 47.
a, the second guide base guide groove 49b (see FIG. 8) corresponds to the second guide base guide groove 49a.

The slide chassis 1 is provided with slide chassis guide grooves 43a, 43b, 43c and 43d. Slide chassis guide grooves 43a, 43b, 4
Guide pins attached to a main chassis 51, which will be described later, are fitted into 3c and 43d, so that the slide chassis 1 can slide in the directions of arrows A and B.

A tension arm 23 is attached to the slide chassis 1 so as to be rotatable about a rotation shaft 25. A guide 27 is attached to the tension arm 23.

A take-up guide arm 29 is mounted on the slide chassis 1 so as to be rotatable about a rotation shaft 31. A take-up guide 33 is attached to the take-up guide arm 29.

Further, a sub-pinch arm 39 is attached to the slide chassis 1 so as to be rotatable about a rotation shaft 37 provided on the slide chassis 1. On the sub-pinch arm 39, the pinch arm 35 is
It is attached so that it can rotate around. A pinch roller 167 is attached to the pinch arm 35.

FIG. 3 is a plan view of a main chassis 51 of one embodiment of the magnetic recording / reproducing apparatus according to the present invention. A loading motor 93, a loading gear 95, a tension cam 97, a mode detection gear 99, and a main cam 53 are rotatably mounted on the main chassis 51. Reference numeral 55 denotes a rotation shaft of the main cam 53. The driving force of the loading motor 93 is
5, transmitted to the main cam 53 via the tension cam 97 and the mode detection gear 99.

A slide chassis drive lever 59 is mounted on the main chassis 51 so as to be rotatable about a rotation shaft 61. Slide chassis drive lever 5
9 is disposed on the main cam 53, and the cam pin 63 provided on the slide chassis driving lever 59 is
It is fitted into a slide chassis drive groove 57 provided in the main cam 53.

A slide chassis drive pin 65 provided on a slide chassis drive lever 59 is fitted into a groove 56 provided on the spring hook 41 on the slide chassis 1. By the rotation of the main cam 53, the cam pin 63 drives the slide chassis driving lever 59 in the directions of arrows C and D, whereby the slide chassis 1 (see FIG. 2) slides in the directions of arrows A and B.

On the main chassis 51, a drum 77 is provided.
Is attached. On both sides of the drum 77, a first guide rail 79a and a second guide rail 79b are arranged. Guide base guide grooves 81 and 83 are provided in the first guide rail 79a. Guide base guide grooves 85 and 87 are provided in the second guide rail 79b.

The guide base guide groove 81 is connected to the second guide base guide groove 49a (see FIG. 2), and the guide base guide groove 83 is connected to the first guide base guide groove 47a (see FIG. 2). The groove 85 is connected to the first guide base guide groove 47b (see FIG. 2), and the guide base guide groove 87 is connected to the second guide base guide groove 49.
b (see FIG. 8).

A capstan motor 75 having a capstan 76 as an axis is mounted near the second guide rail 79b. 89a is a first inclined guide, 89b
Is a second inclined guide. 91a is a first impedance roller, and 91b is a second impedance roller.

Reference numeral 69 denotes a pinch operation lever,
1 is a pinch crimp lever. Reference numeral 101 denotes a loading lever, which is related to driving of the loading arms 3a and 3b (see FIG. 2). A detailed description of the loading lever 101 will be given later.

Next, the loading operation, that is, the operation of the first guide bases 13a and 13b and the second guide bases 15a and 15b shown in FIG. 2 will be described with reference to FIGS.
This is performed using FIG. 23 is a system diagram for explaining loading of the magnetic recording / reproducing apparatus.

FIG. 4 shows the eject state. The cassette 113 (see FIG. 1, the cassette 113 is omitted in FIGS. 4 to 7) is placed on the slide chassis 1. In the eject state, the guide group (the guide 27 and the like) and the pinch roller 167 that are in contact with the non-magnetic surface side of the tape 105 are housed in the cassette mouse 22, and the cassette 113 is attached and detached in this state. .

In the eject state, the arm protrusions 103a provided on the loading arms 3a and 3b are provided.
103b abuts on loading lever bending portions 107a and 107b provided on the loading lever 101,
It is bent inward. Since the loading lever 101 is a spring material, a force for spreading is generated, and as a result, a force in the E direction and the F direction is generated on the loading lever 101. The loading arm 3
A force in the H direction acts on a. Further, a force in the I direction acts on the loading arm 3b by the force in the F direction.

When the loading arm 3a receives a force in the H direction, the first guide base 13a and the second guide base 15a are drawn in the A direction. The first guide base 13a and the second guide base 15a push the slide guide rail 20a in the A direction when sliding in the A direction. Thus, the slide guide rail 20a slides in the direction A against the slide guide rail biasing spring 8a and stops at a predetermined position.

The loading arm 3b receives a force in the direction I similarly to the case of the loading arm 3a, so that the first guide base 13b and the second guide base 15b.
In the direction A. When the first guide base 13b and the second guide base 15b slide in the A direction, the slide guide rail 20b also pushes in the A direction. Thus, the slide guide rail 20b slides in the direction A against the slide guide rail biasing spring 8b and stops at a predetermined position.

In this state, the loading motor 9
When 3 rotates, the slide chassis driving lever 59 starts rotating in the direction of arrow D. Thereby, the slide chassis 1 starts to move in the direction of arrow B.

Further, as the slide chassis 1 slides in the direction of arrow B, as shown in FIG. 5, the arm protrusions 103a and 103b and the loading lever bending portion 10 are formed.
The contact with the loading arms 3a, 107b is released, and then the loading arm hooks 109a, 109b provided on the loading arms 3a, 3b are moved to the loading lever pins 111a, 111b provided on the loading lever 101.
Engage with.

When the sliding of the slide chassis 1 in the direction of arrow B further proceeds, the loading arms 3a and 3b start rotating in the directions of arrows J and K. Thereby, the first guide bases 13a and 13b, the second guide base 15a,
15b starts moving in the direction of arrow B.

When the first guide bases 13a and 13b and the second guide bases 15a and 15b move in the direction of arrow B, there is no force against the slide guide rail biasing springs 8a and 8b, and the slide guide rails 20a and 20b are moved.
b is the first and second guide bases 13a, 13b, 1 by the urging forces of the slide guide rail urging springs 8a, 8b.
It moves in the direction of arrow B together with 5a and 15b. Note that 17
Reference numeral 3 denotes the amount of movement of the slide chassis 1 from the ejected state. 175 is a slide guide rail 20
The movement amount of “a” is shown.

When the sliding of the slide chassis 1 in the direction of arrow B further proceeds, as shown in FIG. 6, the slide guide rail 20a and the first guide rail 79a are connected, and the slide guide rail 20b and the second guide rail 79b are connected. I do. The first guide bases 13a and 13b and the second guide bases 15a and 15b are slide guide rails 20a,
By the end of passing through 20b, slide guide rail 2
0a and the first guide rail 79a, and the slide guide rail 20b and the second guide rail 79b.

When the sliding of the slide chassis 1 in the direction of arrow B further proceeds, the first guide bases 13a, 13b,
The second guide bases 15a and 15b are connected to the first guide rail 7
9a and the second guide rail 79b.

When the slide of the slide chassis 1 in the direction of arrow B further proceeds, the first guide bases 13a and 13b and the second guide bases 15a and 15b are moved to catchers before the slide of the slide chassis 1 is completed, as shown in FIG. Positioned by pins (not shown).

After the slide of the slide chassis 1 is completed, the loading arms 3a and 3b are
When the first guide bases 13a, 13b are bent, the forces in the directions of arrows J and K are urged.
b, the second guide base 15a is in a state of pressing a catcher pin (not shown). Therefore, the positioning of the guide base is performed more reliably.

Further, regarding unloading, since the loading arm hooks 109a and 109b are engaged with the loading lever pins 111a and 111b,
Just slide the slide chassis 1 in the A direction,
Unloading can be performed.

Further, since the spring hooks 41 have spring properties, even when the slide chassis driving pin 65 moves beyond the stroke of the slide chassis 1 during unloading, the overstroke can be absorbed. .

Next, the tape path in this embodiment will be described with reference to FIG. Supply side reel 11 of cassette 113
The tape 105 that has exited the tape 5a passes through the guide 27, the first inclined guide 89a, is inclined on the running plane, and further passes through the second guide roller 19a, the first impedance roller 91a, the first guide roller 17a, and the inclined guide 21, and then the drum 105 7
7 is wound. The tape 105 recorded and reproduced by the drum 77 passes through the first guide roller 17b, the second impedance roller 91b, the second guide roller 19b, and the second inclined guide 89b, and returns to its original running plane. It is sandwiched between pinch rollers 167 and is driven at a constant speed.

Further, the tape 105 is wound around the take-up reel 115b through the guide 33.

FIG. 19 is a plan view of the pinch operation lever 69. A cam pin 139 is provided at one end of the pinch operation lever 69, and a hole 141 is provided at the other end. The pinch operation lever 69 is provided with a pinch operation lever slide groove 137.

As shown in FIG. 11, the pinch operation lever 6
9 is arranged on the main chassis 51. The main chassis 51 includes a pinch operation lever slide shaft 135.
Is mounted, and the pinch operation lever slide groove 137 is fitted into the pinch operation lever slide shaft 135. Thus, the pinch operation lever 69 can slide in the P direction and the Q direction. The pinch operation lever 69 is arranged below the main cam 53. The cam pin 139 provided at one end of the pinch operation lever 69 is
Pinch roller press-fit groove 67 provided in main cam 53
It is fitted in.

FIG. 20 shows the pinch crimp lever 7 shown in FIG.
1 is a plan view of FIG. The pinch crimp lever 71 has a hole 1
45 are provided. Since the hole 145 is fitted into a shaft (not shown) provided in the main chassis,
The pinch pressure lever 71 is rotatable about its axis.

The pinch pressure lever 71 is provided with a shaft 143. The shaft 143 is fitted in the hole 141 shown in FIG. Therefore, the pinch operation lever 69
, The pinch pressure bonding lever 71 rotates.

FIG. 21 is a plan view of the sub-pinch arm 39 shown in FIG. The sub-pinch arm 39 has a hole 153. The hole 153 is fitted into a rotating shaft 37 provided in the slide chassis 1 shown in FIG. Thereby, the sub-pinch arm 39 is rotatable about the rotation shaft 37. The sub-pinch arm 39 is provided with a rotation pin 149. The rotation pin 149 can be brought into contact with contact surfaces 147a and 147b provided on the pinch crimping lever 71 shown in FIG. 20 via an elongated hole (not shown) provided on the slide chassis. .

At the time of loading, the slide chassis slides, but the rotation pin 149 (see FIG. 21) first comes into contact with the contact surface 147a (see FIG. 20). Contact surface 147b
And the sub-pinch arm 39 rotates.

As shown in FIG. 11, the sub-pinch arm 3
Above 9, a pinch arm 35 is arranged. FIG.
As shown in FIG. 2, the pinch arm 35 is provided with a hole 163. The hole 163 is provided on the rotating shaft 3 shown in FIG.
7 is fitted. For this reason, the pinch arm 35 is rotatable about the rotation shaft 37. The pinch arm 35 is provided with a hole 159, and the hole 159
Is provided with a contact piece 161. Contact side 161
Are arranged in a hole 151 provided in the sub-pinch arm 39 shown in FIG.

One end of a pinch compression spring 171 shown in FIG. 11 is attached to a shaft 165 provided on the pinch arm 35 shown in FIG. Also, a pinch crimp spring 1
The other end of the sub pinch arm 3 shown in FIG.
9 are attached by hooks 155 provided on the horn 9. Thereby, the pinch arm 35 and the sub-pinch arm 39 are attracted to each other, but the contact piece 161 (see FIG. 22) is a contact surface 157 which is one of the side surfaces of the hole 151 shown in FIG.
Therefore, a predetermined state can be obtained. Thus, when the sub-pinch arm 39 rotates, the pinch arm 35 also rotates.

FIG. 10 shows a contact surface 147 of the pinch arm 35, the sub-pinch arm 39, and the pinch pressure lever 71.
It is a schematic diagram which shows the positional relationship with b. Reference numeral 169 denotes an elongated hole provided in the slide chassis 1.

The operation of the pinch roller 167 is shown in FIGS.
4 and FIG.

FIG. 11 shows the ejected state as described above. FIG. 12 shows the members shown in FIG.
FIG. 9 is a diagram illustrating a state of members related to the operation of the pinch roller 167. FIG. 13 is a diagram showing the state at the time of completion of loading. FIG. 14 is a diagram illustrating a state of members related to the operation of the pinch roller 167 among the members illustrated in FIG.

Referring to FIGS. 11 and 12, when the main cam 53 starts rotating in the S direction, the slide chassis 1
Starts moving in the B direction. When the slide of the slide chassis 1 advances, the rotation pin 149 contacts the contact surface 147a. When the slide of the slide chassis 1 further advances, the rotation pin 149 contacts the contact surface 147b, so that the pinch arm 35 and the sub-pinch arm 39 are moved. Rotate.

When the rotation of the main cam 53 advances, a pinch operation lever 69 starts from a point detected by a sensor (not shown).
Starts moving in the P direction, and the pinch pressure bonding lever 71 rotates. For example, a sensor that detects that the tape cannot be loaded at the end of the winding works, and a tape rewinding mechanism (not shown) provided on the pinch pressure bonding lever 71 performs an operation of slightly rewinding the tape in this state.

Next, switching between the mode standby state and the recording / reproducing mode is performed with reference to FIGS. FIG.
FIG. 7 is a diagram showing a mode standby state. FIG.
9 is a diagram showing a state of members related to the operation of the pinch roller 167 among the members shown in FIG. FIG. 17 is a diagram illustrating the recording / reproducing mode. FIG. 18 is a diagram illustrating a state of members related to the operation of the pinch roller 167 among the members illustrated in FIG.

Referring to FIG. 15 and FIG.
Is rotated in the S direction, the pinch operation lever 69 moves in the P direction, and the movement of the pinch operation lever 69 causes the pinch pressure lever 71 to further rotate in the R direction. When the pinch pressure lever 71 rotates in the R direction, the pinch arm 35
Rotate in the T direction, and the pinch roller 167 presses against the capstan 76 as shown in FIG.

[0065]

According to the present invention, the cam for moving the slide chassis relative to the main chassis is provided with a slide chassis drive lever and a link rod for pressing the pinch roller to the capstan. The drive mechanism can be used both as the drive mechanism for the pinch roller and the drive mechanism for the slide chassis and the drive mechanism for the pinch roller do not need to be provided separately. Therefore, the number of components used for the drive mechanism of the slide chassis and the drive mechanism of the pinch roller can be reduced, and a magnetic recording / reproducing apparatus that can be reduced in weight can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a tape path of an embodiment of a magnetic recording / reproducing apparatus according to the present invention.

FIG. 2 is a plan view of a slide chassis of one embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 3 is a plan view of a main chassis of one embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 4 is a plan view for explaining the operation of a first guide base and a second guide base provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 5 is a plan view for explaining operations of a first guide base and a second guide base provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 6 is a plan view for explaining operations of a first guide base and a second guide base provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 7 is a plan view for explaining the operation of a first guide base and a second guide base provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 8 is a plan view of a slide guide rail 20b provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 9 is a plan view of a slide guide rail 20a provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 10 is a schematic diagram showing a positional relationship among a pinch arm 35, a sub-pinch arm 39, and a contact surface 147b of a pinch pressure-contacting lever.

FIG. 11 is a plan view for explaining the operation of a pinch roller 167 provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 12 shows a pinch roller 16 of the members shown in FIG.
FIG. 9 is a diagram illustrating a state of members related to the operation of FIG.

FIG. 13 is a plan view for explaining the operation of a pinch roller 167 provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 14 shows a pinch roller 16 of the members shown in FIG. 13;
FIG. 9 is a diagram illustrating a state of members related to the operation of FIG.

FIG. 15 is a plan view showing a mode standby state of one embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 16 shows a pinch roller 16 of the members shown in FIG.
FIG. 9 is a diagram illustrating a state of members related to the operation of FIG.

FIG. 17 is a plan view showing a recording / reproducing mode of one embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 18 shows a pinch roller 16 of the members shown in FIG. 17;
FIG. 9 is a diagram illustrating a state of members related to the operation of FIG.

FIG. 19 is a plan view of a pinch operation lever provided in an embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 20 is a plan view of the pinch crimp lever shown in FIG. 3;

FIG. 21 is a plan view of the sub-pinch arm shown in FIG.

FIG. 22 is a plan view of the pinch arm 35 shown in FIG.

FIG. 23 is a system diagram for explaining the operation of one embodiment of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 24 is a plan view of a slide chassis of a conventional magnetic recording / reproducing apparatus.

FIG. 25 is a plan view of a main chassis of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 1 slide chassis 51 main chassis 53 main cam 69 pinch operation lever 167 pinch roller

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Yokomachi 22-22 Nagaikecho, Abeno-ku, Osaka City Inside Sharpe Corporation (72) Inventor Kazutaka Abe 22-22 Nagaikecho, Abeno-ku, Osaka City Inside Sharpe Corporation (56) References JP-A-61-296557 (JP, A) JP-A-58-200459 (JP, A)

Claims (1)

(57) [Claims] A cam for moving a slide chassis relative to a main chassis; a slide chassis drive lever connected to the cam and the slide chassis and driven by rotation of the cam; A magnetic recording / reproducing apparatus, comprising: a link rod connected to the cam and driven by rotation of the cam; and a pinch roller driven by the link rod and pressed against a capstan shaft.