JP2002170297A - Magnetic recorder and reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized and thin magnetic recorder/reproducer which reduces a load current to reel driving, and which corresponds to multiple modes. SOLUTION: The magnetic recorder/reproducer is constituted in such a way that the operations of oscillating gears 115 and 116 which are engaged by rocking with one of a supply side reel base 107 and a winding side reel base 118 to drive the reel bases 107 and 118 are performed by a motor which changes-over loading and modes, the oscillating gears 115 and 116 are made to be neutral or engaged with one of the bases when loading and, then, the gears 115 and 116 are engaged with the other base when unloading.

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 such as a video tape recorder (VTR), which selectively contacts a reel base to change a swinging gear for driving the reel base for loading or mode switching. The present invention relates to a magnetic recording / reproducing apparatus which is configured so that a swinging gear is meshed with a neutral or any one during loading and a swinging gear is meshed with the other during unloading.

[0002]

2. Description of the Related Art It is clear from the trend of the times that a mechanism capable of coping with multiple modes with a small number of components is desired as a structure of a control member used to cope with each operation mode (multi-mode) such as a VTR. It is something. Incidentally, as a mechanism for coping with this kind of multi-mode, for example, Japanese Patent Application Laid-Open No. H10-162450 is found.

As described above, in a VTR or the like, the number of components (the number of components) is small and the moving distance and the like can be made as large as possible because it is necessary to cope with multiple modes with a small number of components. Need to be. This is because, if each operation mode can be handled with a small number of components, the mechanism is not complicated, and the size and thickness can be further reduced. In that sense, one solution described in the above publication is
It is a nod. However, according to the configuration described in this publication, the shape of the cam groove provided in the cam gear is made more complicated to cope with multiple modes, and the control member of the control member for coping with each operation mode meshed with this. The configuration is inevitably complicated.

As another configuration, there is a technique described in Japanese Patent Publication No. 8-34023, for example, when the mode is switched from the reproduction mode to the reverse reproduction mode, and vice versa. Although the swinging operation is forcibly performed while the head is being moved to prevent image omission, etc., since the forced swinging operation is performed by an external power, the structure is inevitably complicated.

Further, as described in Japanese Patent Application Laid-Open No. 2-260160, the forward (FWD) mode is switched to the reverse (RWD) mode.
When the mode is switched to the EV) mode and vice versa, the pinch roller is pressed against the capstan, and the capping shaft is not rotated. Although a mechanism for preventing the rotation of the capstan shaft has been proposed, the oscillating mechanism used in the other mode is configured to swing by a frictional force following the rotation of a motor for rotating the capstan shaft in other modes. For this reason, since the frictional force is always a load on the motor that rotates the capstan shaft, the power consumption is increased and the FF is increased.
There is a minus that also affects the / REW speed.

In view of the above problems, the applicant of the present invention has proposed, in Japanese Patent Application No. 10-209918, an improved structure capable of solving the above problems, reducing the number of parts and achieving a thinner mechanism. A magnetic recording / reproducing device has been proposed.

Hereinafter, the configuration of the improved magnetic recording / reproducing apparatus will be described with reference to FIGS. FIG.
FIG. 1 is a plan view of an illustrative example of the improved magnetic recording / reproducing apparatus, showing an arrangement of main components of the magnetic recording / reproducing apparatus 1. The magnetic recording / reproducing apparatus 1A includes a main deck 2 and a sub-deck 3 slidably mounted on the main deck 2. 40 is a sub-deck slide mechanism provided on the main deck 2 and the sub-deck 3, and 50 is a mode switching mechanism provided on the main deck 2 and the sub-deck 3. Here, T is a cassette tape, and the cassette half is omitted, and only the magnetic tape T1 is shown.

The main deck 2 includes a main chassis 11
A loading motor 12 as a drive source attached to the main chassis 11;
2, a control gear 14, which is rotatably mounted via a gear train 13, a drum 15, and a capstan motor 16
, A supply side guide pole 17, a winding side guide pole 18, and fixed guides 21, 22, 23. 11
a is a guide boss formed on the main chassis 11, 11b
Is a guide groove of a supply side guide pole 17 formed in the main chassis 11, 11c is a guide groove of a take-up side guide pole 18, 16a is a capstan which is a motor shaft of a capstan motor, and 24 is a guide boss 11a. Mounting screw for slidably mounting the sub-deck 3 to the sub-deck 3.

The loading motor 12 includes a supply-side guide pole 17, a take-up side guide pole 18, a pinch roller unit 37, a tension unit 38,
Movement guide unit 39, sub-deck slide mechanism 4
0 and a drive source of the mode switching mechanism 50. The control gear 14 includes a gear portion 14 a fitted to the gear train 13.
And a pin 14b for driving the sub-deck slide mechanism 40 and the mode switching mechanism 50.

The sub-deck 3 is driven by the sub-chassis 31, a driving lever 32 swingably mounted on the sub-chassis 31, a mode switching plate 33 for switching the operation mode by the driving lever 32, and the mode switching plate 33. It comprises a brake unit 34, a supply-side reel base 35, a take-up reel base 36, a pinch roller unit 37, a tension unit 38, and a movement guide unit 39. Brake unit 34
Is a member that is swingably attached to the sub-chassis 31 and stops the take-up reel base 36, and is an example of a member that is driven by the mode switching plate 33.

The state shown in FIG. 8 and FIG.
11 (a), (b), and the state of FIG. 11 (a) show a state in which the brake unit 34 is operated and the take-up reel base 36 is stopped. Other members driven by the mode switching plate 33 include a driving member (not shown) for turning the tension unit 38 on and off.

Reference numeral 31a denotes a cam groove formed in the sub-chassis 31, reference numeral 31b denotes a support hole serving as a fulcrum for supporting the drive lever 32 formed in the sub-chassis 31, and reference numeral 31c denotes a configuration of the drive lever 32 formed in the sub-chassis 31. Arc holes for penetrating components, 31d are slide grooves formed in the sub-chassis 31, and 31e, 31f, 31g are guide pins for guiding the operation switching plate 33 formed in the sub-chassis.

FIG. 9 is an exploded perspective view of the magnetic recording / reproducing apparatus, showing the sub-deck slide mechanism 40 and the mode switching mechanism 50. The sub-deck slide mechanism 40
The loading motor 12 described above, a control gear 14 meshed with the loading motor 12 via a gear train 13, a sub-chassis 31 for fitting to the pin 14b of the control gear 14, and And a cam groove 31a.

The mode switching mechanism 50 includes a loading motor 12, a gear train 13 and a control gear 14, which are shared with the sub-deck slide mechanism 40, a driving lever 32 described above fitted to the pin 14b of the control gear 14, and A mode switching plate 33 for switching the operation mode with the drive lever 32 is provided.

More specifically, the drive lever 32 is a substantially L-shaped lever, and has a support pin 32a which fits into a support hole 31b of the sub-chassis 31, and one end of the support pin 32a has a control gear. 14 is formed with a cam hole 32b to be fitted to the pin 14b, and the driving pin 3 to be fitted to the mode switching plate 33 is provided at the other end of the support pin 32a.
2c is formed.

The mode switching plate 33 is a plate formed by bending into a substantially L-shape. The mode switching plate 33 has elongated holes 33a, 33b, and 33c to be fitted into guide pins 31e, 31f, and 31g of the sub-chassis 31, respectively. 32
An elongated hole 33d to be fitted to the drive pin 32c is formed, and a drive unit 33e for operating the brake unit 34 (see FIG. 8) is formed.

The operation of the magnetic recording / reproducing apparatus 1A described above will now be described. First, the operation of the magnetic recording / reproducing apparatus 1A will be described. FIGS. 10A and 10B are explanatory diagrams of a first operation of the magnetic recording and reproducing apparatus described above. In (a), the cassette tape T is mounted on the sub-deck 3. In the state shown in this figure, the cassette tape T is at the position where the sub-deck 3 is farthest from the drum 15 of the main deck 2, that is, at the unloading end position which is the initial position. Next, the loading motor 12 (FIG. 8)
) To rotate the control gear 14 as shown by the arrow A to start tape loading.

In FIG. 2B, the control gear 14 is rotated clockwise as indicated by an arrow B to move the sub-deck 3 toward the drum 15 of the main deck 2 as indicated by an arrow C, and the loading motor 12 (see FIG. 8). )
Then, the tension unit 38, the supply side guide pole 17, the winding side guide pole 18, and the moving tape guide unit 39 are moved from the left side of the drawing, and the magnetic tape T1 is pulled out from a cassette half (not shown).

FIGS. 11A and 11B are diagrams for explaining the second operation of the magnetic recording and reproducing apparatus 1A. 5A, the sub-deck 3 is further moved to the drum 15 side of the main deck 2 as indicated by an arrow D, and the tension unit 38, the supply-side guide pole 17, and the take-up side guide pole 18 are loaded by a loading motor from the left of the drawing. Then, the moving tape guide 39 is moved, the magnetic tape T1 is pulled out from the cassette half (not shown), and the tape loading is completed. The pinch roller unit 37 is still
The magnetic recording / reproducing apparatus 1 is in a stopped state, being away from the capstan 16a.

In FIG. 2B, the loading motor is rotated to move the pinch roller unit 37 to the capstan 16.
a, the control gear 14 is rotated as indicated by an arrow F, and the drive lever 32 connected thereto is swung as indicated by an arrow G, whereby the mode switching plate 33 is swung as indicated by an arrow H. Then, the brake unit 34 is moved to the take-up reel base 36.
To start recording and reproduction on the magnetic tape T1. That is, the magnetic recording / reproducing apparatus 1 enters the play state.

FIGS. 12 (a) and 12 (b) are diagrams for explaining the operation of the magnetic recording / reproducing apparatus described above. FIG. 12 (a) shows a magnetic recording / reproducing apparatus 70 of a comparative example, and FIG. 12 (b) is an improved explanation. 1 shows an example magnetic recording / reproducing apparatus 1B. 9A, the magnetic recording / reproducing apparatus 70 has a control gear 76 provided with a pin 76b for sliding the sub-chassis 78.
In order to drive the drive lever 77, the control gear 7
6 is provided with a cam portion 76c.
Space efficiency of the control gear 76
Therefore, it is not possible to newly add a cam portion or the like in order to perform another function, so that a separate part or the like is required, and the mechanism becomes complicated.

The drive lever 7 is attached to the main chassis 74.
7 so as to be swingable, and while the fitting pin 77b is fitted to the control gear 76 on the main chassis 74,
Since the long hole 77c is fitted to the mode switching plate 79 on the sub-deck 78, it is difficult to assemble the sub-deck 73 on the main deck 72.

In (b), the magnetic recording / reproducing apparatus 1B
A cam groove 31a formed in the control chassis 14 with a pin 14b formed in the sub-chassis 31
And the drive lever 32 is also swung by the pin 14b, so that the control gear 14 can be simplified. In addition, the assembly of the drive lever 32 and the mode switching plate 33 on the sub-chassis 31 in advance can be mounted on the main chassis 11, so that the assembly is facilitated.

FIG. 13 shows the magnetic recording / reproducing apparatus 1A described above.
FIG. 11 is an exploded perspective view of a sub-chassis used in another improved explanation example of FIG. 10, and the same parts as those of the sub-chassis 31 shown in FIG. The sub-chassis 61 includes a sub-chassis main body 62 as a main body, and a sub-chassis main body 6.
2 and an adjustment plate 63 that is attached to be adjustable. 64 is a mounting screw. The sub-chassis main body 62 is a plate whose periphery is reinforced and bent. The sub-chassis main body 62 is formed with an arc-shaped hole 31c for penetrating the drive pin 32c of the drive lever 32, and the guide boss 1 of the main chassis 11 shown in FIG.
1a is formed with a slide groove 31d, and guide pins 31e, 31f, 31g for guiding the mode switching plate 33 (see FIG. 9) are set up.
And a screw hole 62b for mounting the adjusting plate 63 is formed. Reference numeral 62c is a slide groove formed in the escape hole 62a.

The adjusting plate 63 is a substantially flat member, and forms a cam groove 31a to be inserted into the pin 14b of the control gear 14 shown in FIG. 9, and forms a support hole 31b for supporting the drive lever 32. In addition, a long hole 63a for attachment is formed, and the slide groove 6 of the escape hole 62a is formed.
A guide portion 63b to be fitted to 2c is formed.
That is, the sub-chassis 61 has a support hole 31b for supporting the drive lever 32 and a cam groove 31a formed on an adjustment plate 63 different from the sub-chassis 31 shown in FIG. Is adjustable.

Next, the operation of the sub-chassis 61 will be described. FIGS. 14A and 14B are explanatory diagrams of the operation of a subchassis used in another improved example of the magnetic recording / reproducing apparatus 1B described above. FIG. FIG. 3B shows an example in which the sub-chassis 61 is initially set at a position farthest away from the drum 15, and FIG. L is the sub-chassis 61
Shows the setting range of the initial position of.

Here, the initial position of the sub-chassis 61 is changed from the state shown in (a) to the state shown in (b). Sub chassis 6
1 separates the cam groove 31a and the support hole 31b from the sub-chassis main body 62 as another adjustment plate 63, so that the phase relationship between the cam groove 31a and the support hole 31b with respect to the pin 14b of the control gear 14 is not changed. The initial position of the sub-chassis body 62 in the sliding direction can be adjusted.

The adjusting plate 63 shown in FIG. 14 has a cam groove 31a and a supporting hole 31b as a fulcrum.
It may include guide pins 31e, 31f and 31g for guiding the mode switching plate 33 shown in FIG.

By the way, the above-mentioned magnetic recording / reproducing apparatus 1A
For example, when the brake is applied to the take-up reel base 36 and the brake is released (brake control), the rotational force of the loading motor 12 is transmitted to the mode switching plate 33 via the gear train 13, the control gear 14, and the like. This is done by sliding the mode switching plate 33 in the horizontal direction.

A rotatable drive lever 32 provided with a cam groove 32b is provided between the control gear 14 and a mode switching plate 33 capable of horizontal reciprocating movement in order to smoothly perform this sliding movement. .

On the other hand, as described above, the control gear 1
4 is provided on the main chassis 11 and the drive lever 32 is provided on the sub-chassis 31.
Since the relative position changes, the cam shape of the drive lever 32 is complicatedly formed. Further, because of such a configuration, the thickness of the mechanism is increased, which hinders miniaturization and thinning.

On the other hand, the reel drive which is not the direct drive is performed by transmitting the rotation from the drive source using the swinging gear at the time of the mode transition. In today's increasingly compact and lightweight world, some of the components that make up the equipment are mounted on a slide deck, and this type of reel drive mechanism, which has been further reduced in size and weight, is not suitable for mode transition. The swing motion of the drive uses a capstan motor etc. in the drive system, applies a rotational load to the gear using a clutch,
There are many things that go with that power.

FIG. 7 shows a conventional magnetic recording / reproducing apparatus 1 of this kind.
FIG. 2 is a plan view of a main deck 2 constituting the main deck. The same parts as those in the above-described conventional example are denoted by the same reference numerals, and the detailed description thereof will be omitted. This magnetic recording / reproducing apparatus 1
The configuration is roughly as follows. That is, main deck 2
On the upper side, the supply side reel base 35 and the supply side reel base 3
A drum 1 on which a tape T unreeled from a tape cassette (not shown) mounted on
5, a capstan motor 16 for running the tape T sent from the outlet side of the drum 15, a capstan shaft 16a which is a rotation axis of the capstan motor 16, and a tape together with the capstan shaft 16a. A pinch roller 4 for nipping and performing a predetermined tape running, and a take-up reel base 36 for taking up the fed tape T by the pinch roller 4 and the capstan shaft 16a are provided. .

Reference numeral 5 denotes a rotor provided on the above-described capstan motor 16, and a gear 5a is formed on the outer periphery. Reference numeral 6 denotes a reduction gear for reducing the rotation of the capstan shaft 16a by meshing with the gear 5a. Reference numeral 8 is provided around the reel disc, and rotates by the timing belt 7 from the reduction gear 6 described above. The transmission member, 8a is a gear attached to the relay member 8, and 9 is a swing arm.
A swing gear 10 meshing with the gear 8a is provided. The swing operation is performed by utilizing the torque generated by a clutch mechanism (not shown) provided in the swing gear 10.

[0035]

As described above, in the conventional reel driving mechanism, the load (torque) is applied to the swing gear 10.
, The load current increases when driving the reel. Moreover, since the clutch mechanism is provided in the swing gear 10, the components are overlapped in the thickness direction and the structure becomes complicated, which hinders the thinning of the mechanism.
Furthermore, the number of parts for configuring the clutch mechanism increases,
The cost will also increase.

On the other hand, the VTR has a so-called jog shuttle function that can appropriately perform slow reproduction, high-speed reproduction, slow or high-speed reproduction of frames, or frame transmission of a still image in the reproduction direction or the reverse reproduction direction. Some of these are additionally provided. With such a function, for example, a playback mode (a mode in which a tape is run in a playback direction and a mode in which an image signal is played) is changed to a reverse playback mode (a tape is run in a reverse playback direction). Further, when the mode is switched to the mode of reproducing the image signal), the screen being reproduced at the time of the switching includes noise, the screen is blurred, or the image is misaligned. There was a problem.

That is, in a video tape recorder in which the capstan shaft is rotated by one motor and the reel base gear is rotated, when the mode is switched from the reproduction mode to the reverse reproduction mode, the swing lever swings. During this time, the reel base gear does not rotate at all and the capstan shaft continues to rotate and feeds out the tape, even though the tape is not wound up, causing slack in the tape path system. As a result, a gap occurs between the rotary head drum and the tape surface, and a problem such as a missing image, a misalignment, or noise on the screen has occurred.

When the driving source is a capstan motor, it is necessary to perform a swing operation before pressing the pinch roller to prevent the tape from sagging. It takes time to shift the mode, and an unrecorded image (image omission) occurs. For this reason, there is a risk that a recording chance may be missed in shooting with a video camera or the like. In order to eliminate the image omission, a special mechanism for swinging the swing arm in parallel with the pressing of the pinch roller to the capstan shaft is required, so that the cost is increased. There was a problem.

Therefore, according to the present invention, a swing gear for selectively contacting the reel base and driving the reel base is performed by a motor for loading or mode switching. It is an object of the present invention to provide a high-performance and low-power-consumption magnetic recording / reproducing apparatus that solves the above-mentioned problem by configuring the swing gear to mesh with the swing gear during unloading. It is.

[0040]

SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and the invention according to claim 1 is characterized in that one of the supply-side reel table 107 and the take-up reel table 118 swings. The operation of the swinging gears 115 and 116 for driving the reel bases 107 and 118 by meshing with each other is performed by a motor that switches between loading and mode switching.
5, 116 are engaged with each other, and at the time of unloading, the swinging gears 115, 116 are engaged with each other.

[0041]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that since the following examples are preferred specific examples of the present invention, various technically preferable limitations are added. However, the scope of the present invention is particularly limited in the following description. Are not limited to these embodiments unless otherwise described.

FIG. 1 is a plan view showing an eject (EJECT) mode as a preferred embodiment of the magnetic recording / reproducing apparatus according to the present invention, FIG. 2 is a plan view showing a forward (FWD) mode, and FIG. FIG. 4 is a plan view of a reverse (REV) mode state, FIG. 4 is a plan view of a process of unloading from a reverse (REV) mode to an eject (EJECT) mode, and FIG. FIG. 6 is a plan view showing the relationship between a certain cam and a pin, and FIG. 6 is a detailed explanatory view of the cam. In the following description, the same parts as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 100 denotes a magnetic recording / reproducing apparatus, and 101 denotes a main chassis serving as a fixed portion of the magnetic recording / reproducing apparatus 100. This main chassis 101
Has a drum 15 and a pulley 1 of a capstan motor.
6, supply side guide pole 17, winding side guide pole 1
8, a loading motor (not shown) which is a driving source of the supply side guide pole 17, the winding side guide pole 18, and the like;
A driving force transmitting member 102, a cam portion 103, and the like are attached. In addition, 16a is a capstan which is a motor shaft of the capstan motor.

Reference numeral 104 denotes an arm member. The arm member 104 has a pin 123 fixedly provided at a tip end thereof, and the pin 123 is inserted into the cam portion 103. The pin 123 moves in the cam portion 103 according to each operation mode (multi-mode) of the driving force transmitting member 102 described above.

Reference numeral 105 denotes a slider which moves left and right in the direction of the arrow in FIG. 1. The slider 105 and the arm member 104 are connected by a pin 124. Accordingly, as described above, the transmission force corresponding to each operation mode transmitted via the loading motor (not shown) and the control member (not shown) connected to the loading motor is transmitted to the gear unit 102, the cam unit 103, and the arm. This is transmitted to the slider 105 via the member 104.

Reference numeral 106 denotes a cam portion, which is a main portion of the present embodiment, which will be described in detail later. Reference numeral 107 denotes a supply-side reel base, and the supply-side reel base 107 is provided with a gear portion 107a.
A gear 119 is always meshed with the gear portion 107a.

Reference numeral 108 denotes a substantially L-shaped swing arm.
A pin 110 that engages with the cam groove in 06 is implanted, and a long hole 121 is formed at the tip of the other end 108b.
Reference numeral 109 denotes a pivot of the swing arm 108.

Reference numeral 112 denotes a swing arm. The swing arm 112 has a pin 111 and a support shaft 117, respectively.
The gear 115 and the gear 116 are attached via the.
On the other hand, a relay member 114 is attached to the center of the swing arm 112 via a pin 113, and the relay member 114 is formed with a gear portion 114a. The gear portion 114a is always meshed with the gears 115 and 116 described above.

The pin 1 fixed on the swing arm 112
The gear 115 mounted on the gear 11 is in contact with and separates from the gear 119 which is always meshed with the gear portion 107a provided on the supply side reel base 107 according to the operation mode.

Reference numeral 118 denotes a take-up reel base. The take-up reel base 118 is provided with a gear 118a, and the gear 120 is always engaged with the gear 120. is there. A belt 122 is mounted between the capstan motor 16 and the relay member 114.

Next, the operation of the magnetic recording / reproducing apparatus 100 will be described with reference to FIGS. As described above, the magnetic recording / reproducing apparatus 100 is configured to correspond to each operation mode.

FIG. 1 is a plan view of the cassette ejection (EJECT) mode. Next, this eject (EJ
A so-called loading operation for shifting from the (ECT) mode to the forward (FWD) mode will be described. A tape cassette (not shown) is inserted into the apparatus, and loading is started by operating a mode motor (not shown).
Operates to move the slider 105 leftward in the figure. In response to the movement of the slider 105, the supply-side guide pole 1
7. The take-up guide pole 18 pulls out the tape from the tape cassette and winds it around a predetermined position on the drum 15. In this state, each gear 107a, gear 1
The gear 19, the gear 115, the gear 114a, and the gear 116 are meshed as shown in the figure.

On the other hand, in response to the leftward movement of the slider 105, the pin 110 moves in the cam groove of the cam portion 106.
FIG. 2 is a plan view showing a state in which a transition has been made from the above-described eject (EJECT) mode of FIG. 1 to a forward (FWD) mode via a loading operation, and FIGS.
(A) As is clear, during the loading operation, the pin 110 first moves on the slope 106a and reaches the flat plateau 106b. Thereafter, the light reaches the flat portion 106d via the cliff portion 106c. The movement of the pin 110 by the leftward movement of the slider 105 causes one end 108a of the swing arm 108 to rotate clockwise, and the other end 108b of the swing arm 108 provided integrally with the swing arm 108 to be centered on the fulcrum 109. Is supplied with a clockwise turning force.

The other end 108 of the swing arm 108
pin 1 engaged with a long hole 121 provided at the tip of b
Similarly, clockwise turning power is applied to the rotation arm 11, and this turning power is supplied to the swing arm 1 via the support shaft 113.
12 will be applied to the other end as counterclockwise turning power. Therefore, the gear 116 provided at the other end of the swing arm 112 meshes with the gear 120 which is always meshed with the gear portion 118a provided on the take-up reel base 118. Then, the magnetic recording / reproducing device 100
Enters the forward (FWD) mode and the tape
It is wound on a take-up reel 118.

FIG. 3 shows the forward (FWD) of FIG.
FIG. 11 is a plan view showing a state in which the slider 105 further moves leftward from the mode to shift to a reverse (REV) mode.
When the slider 105 moves leftward, it is performed after the capstan shaft stops. At the time of transition from the forward (FWD) mode to the reverse (REV) mode, as shown in FIG. 5, the pin 110 is moved from the forward (FWD) position to the cam portion 1.
It moves along the cam groove No. 06 and reaches the REV position shown in the figure.

The pin 110 is connected to the reverse (RE
When reaching the position V), the pin 110 is given a counterclockwise turning force. Accordingly, the counterclockwise turning force is applied to the other end 108 b of the swing arm 108 via the pin 109 as a counterclockwise turning force. As a result, a clockwise turning force is applied to the swing arm 112 about the support shaft 113. Therefore, the take-up reel base 1
The gear 120 that is always meshed with the gear portion 118a provided on the gear 18 and the gear 116 provided on the other end of the swing arm 112 are disengaged, and the swing arm 1
The gear 115 provided at one end of the gear 12 and the gear 119 which is always meshed with the gear portion 107a provided on the supply-side reel base 107 mesh with each other. Then, the rotation of the capstan shaft is returned. Then, the magnetic recording / reproducing apparatus 100 shifts to the reverse (REV) mode, and the tape is wound on the supply reel 107.

FIG. 4 is a plan view showing a process of unloading from the forward (FWD) mode to the eject (EJECT) mode. Here, the unloading operation will be described. When the operation shifts to the unloading operation, unloading is started by operating a mode motor (not shown), and accordingly, the arm member 104 is operated to move the slider 105 rightward in the figure. And this slider 10
In response to the movement of 5, the supply-side guide pole 17 and the take-up side guide pole 18 are retracted from the tape cassette and returned to their original positions by means not shown.

At the time of this unloading operation,
As shown in FIG. 5, 0 moves from the reverse (REV) position along the cam groove of the cam portion 106 in a direction opposite to the above-described direction, and reaches a position in the middle of unloading as shown.
Hereinafter, this point will be described in detail.

As clearly shown in FIG. 5, the pin 110 moves from the reverse (REV) position to the above-mentioned plane portion 106d in a direction opposite to the above-mentioned direction, and first reaches the forward (FWD) mode position. This forward (FW
D) When reaching the mode position, as described above, the swing arm 1
08 rotates clockwise, and a clockwise turning force is applied to the other end 108b of the swing arm 108 provided integrally therewith about the fulcrum 109.

The other end 108 of the swing arm 108
The pin 11 engaged with the long hole portion 121 provided at the tip of b
Similarly, the clockwise turning force is applied to 1 as well,
This turning force is transmitted to the swing arm 112 via the support shaft 113.
Is applied to the other end in the counterclockwise direction. Therefore, the gear 116 provided at the other end is engaged with the gear 120 which is always engaged with the gear portion 118a provided on the take-up reel base 118. Thus, when unloading, the swing arm 1
Since the gear 116 attached to the gear 12 meshes with the gear 120, the tape can be wound without loosening the tape. Thereafter, the robot further moves to reach the unloading intermediate position shown in the figure.

Next, a case where the unloading halfway position is shifted to the cassette ejection (EJECT) position will be described with reference to FIGS. In FIG. 5, the pin 110 is moved from the middle of the unloading position to the slope 106.
Through e, reach the top. Then, after reaching the flat portion 106g via the cliff portion 106f, the cassette is taken out (EJ
(ECT) position.

As described above, the pin 110 that moves in the cam portion 106 passes through a plurality of slopes according to the operation mode. The pin 110 is provided with an inclination, and because of its shape, the pin 110 cannot reverse in the moving direction, that is, since the mode is changed only by moving in one direction, the pin 110 It can move smoothly.

[0063]

According to the first aspect of the present invention, the operation of the oscillating gear that swings and meshes with one of the supply-side reel base and the take-up reel base to drive the reel base is performed in the loading or mode. When switching from the FWD mode to the REV mode, the motor is used for switching, and when loading, the swinging gear is neutral or one of them is meshed with the swinging gear, and the other is unloading, the swinging gear is meshed with the other. And at the time of converse, while the pinch roller is pressed against the capstan, and forcibly perform the swing operation by the swing mechanism in a state where the capstan shaft does not rotate,
Missing images can be prevented. In addition, the frictional force for swinging is unnecessary, so that power consumption can be reduced and F
The F / REW speed can be increased. Further, since a motor dedicated to swinging is not required, cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an eject mode according to an embodiment of the present invention.

FIG. 2 is a plan view of a magnetic recording / reproducing apparatus according to the present invention in a forward (FWD) mode state.

FIG. 3 shows the reverse (R) of the magnetic recording / reproducing apparatus according to the present invention.
It is a top view of an EV) mode state.

FIG. 4 is a plan view showing a process of shifting to unloading of the magnetic recording / reproducing apparatus according to the present invention.

FIG. 5 is a plan view showing a relation between a cam and a pin, which are main parts of the present invention.

FIG. 6 is a detailed explanatory view of a cam.

FIG. 7 is a plan view of a main part of a main deck constituting a conventional magnetic recording / reproducing apparatus.

FIG. 8 is a plan view of an illustrative example of an improved magnetic recording / reproducing device.

FIG. 9 is an exploded perspective view of the same.

FIG. 10 is a first operation explanatory view of the same.

FIG. 11 is a second operation explanatory diagram of the same.

FIG. 12 is an operation explanatory view of the same.

FIG. 13 is an exploded perspective view of a subchassis according to another embodiment.

FIG. 14 is an exploded perspective view of a sub-chassis according to another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 magnetic recording / reproducing device 105 slide member 106 cam portion 107 supply reel stand 108 swing arm 111 pin 112 swing arm 114 relay member 118 take-up reel stand 115, 116, 119, 120 gear

Claims (1)

[Claims] An oscillating gear that swings and meshes with one of a supply-side reel base and a take-up reel base to drive the reel base is operated by a motor that performs loading and mode switching. A magnetic recording / reproducing apparatus characterized in that a swinging gear is meshed with either the neutral or one of them at the time, and a swinging gear is meshed with the other at the time of unloading.