JPH0233315Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette loading device for a VTR.

[Prior art]

One of the tape loading methods is the so-called new U loading method, which is designed to reduce the thickness of the loading device (Japanese Patent Application Laid-Open No. 1983-1999).
No. 86161).

This new U loading system will be explained based on FIG.
4, 14, and the lid 36 on the side of the cassette is automatically opened on the way down.

A first leading guide 61 on the tape supply side, a tape guide 62, a second leading guide 71 on the tape winding side, and a pinch roller 73 are fitted into the notch 39 on the bottom of the cassette 34, as shown by chain lines.

The first leading guide 61 and tape guide 62 are
From the cassette mounting station to the head drum 13
is provided on a first slider 6 that is slidably fitted into an arc-shaped first guide portion 4 provided through the left side of the slider,
The second leading guide 71 and the pinch roller 73 are provided on the second slider 7 which is slidably fitted into the arcuate second guide portion 5 provided on the right side of the head drum 13.

The second guide part 5 is provided horizontally, but the first
The guide portion 4 is inclined gradually higher in the loading direction indicated by the arrow _A1 .

An annular first driving member (not shown) that moves along an arc of the first guiding part 4 in a horizontal plane is disposed below the first guiding part 4, and the driving member and the first slider 6 are connected by a movable connecting member (not shown).

An annular second drive member (not shown) that moves along the arc of the second guide part 5 in a horizontal plane is provided below the second guide part 5, and the drive member and the second slider 7 are connected. ing.

Moreover, a plurality of guide pins 33, 33 that can be raised and lowered are arranged on the first driving member.

After the cassette is installed, the first and second drive members operate simultaneously, the first slider 6 moves clockwise around the outer circumference of the drum 13 along the first guide section 4, and the second slider 7 moves along the second guide section 5. move counterclockwise along.

First and second leading guides 61 on each slider,
71, the tapes T in the cassette are sequentially pulled out.

The guide pins 33, 33 on the first drive member stand up when passing the cassette 34 and hook the tape T thereon.

As described above, the first guide part 4 is inclined gradually higher in the clockwise direction, so the first leading guide 61 moving on the guide part 4 pulls out the tape T while lifting it. The second leading guide 71 pulls out the tape horizontally. When the first and second leading guides 61, 71 and the pinch roller 73 reach the position shown by the solid line in FIG. 12, loading of the tape is completed.

The tape T is wound helically around the drum 13 about half a turn and comes into sliding contact with the full-width erasing head 3, the audio control head 31, and the captan 32.

When the record button or playback button is pressed in the above state, the pinch roller 43 is moved to the position indicated by the chain line by a pinch roller drive device (not shown), presses the tape T onto the capstan 32, and rotates the capstan 32. Then the tape T runs.

In the new U-loading device, the drive device for driving the first and second leading guides 61 and 71 moves in a horizontal plane, so the height of the tape-loading device is higher than that of the conventional U-loading device that uses an inclined loading ring. It has the advantage of being able to reduce the thickness in both directions.

However, even in this new U loading mechanism, the cassette 34 must be fitted into the reel stand 14 in a fixed position from above, and the loading height of the cassette 34 and the mounting height on the reel stand 14 must be adjusted. The difference appears in the thickness of the VTR in the height direction.
This is a constraint on reducing the thickness of the material.

[Purpose of this invention]

The purpose of the present invention is to reduce the thickness of the entire device by eliminating vertical movement when the cassette is attached.

[Structure of the present invention]

The present invention provides the new U loading device, in which the chassis of the device is composed of a head side chassis and a cassette receiving chassis that can approach and move away from the chassis, and a portion of each of the first guide section and the second guide section. is connected to the cassette receiver chassis.

[Operation of the present invention]

If the cassette receiver chassis is moved forward, a cassette is loaded from above the chassis, and the cassette receiver chassis is returned to the head drum side chassis again, the first guide section and the second guide section are connected to each other, and the first guide section is connected to the first guide section. The guide and the second leading guide are allowed to move from the cassette receiver chassis side to the head drum side chassis, and pull out the tape from the cassette and wind the tape around the head drum.

[Special effects of the present invention]

The cassette holder chassis is exposed from the front of the VTR body and the cassette can be installed.
There is no need to raise and lower the cassette inside the main body of the VTR, and it corresponds to the space allowed for raising and lowering the conventional cassette.
The thickness of the VTR can be reduced.

The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 is a plan view of the loading device.

The chassis 1 of the loading device is separable into a head side chassis 11 (hereinafter referred to as the rear chassis) including a head drum 13 and a cassette receiver side chassis 12 (hereinafter referred to as the front chassis) including the reel stand 14.

As shown in FIG. 2, the front chassis 12 is removable from the front surface 15 of the main body 10 of the VTR, and has a front plate 17 and side plates 18, 18 of a size corresponding to the opening 16 in the front surface. Post 19a
A trapezoidal cover 19 is provided via the trapezoidal cover 19.

The cover 19 is sized to fit into a notch in the bottom of the cassette.

A front and rear drive device 2 is connected to the front chassis 12. The longitudinal drive device 2 includes rack plates 21, 21 with elongated holes 20 that protrude rearward from both side plates 18, 18 of the front chassis 12 in parallel, and pinion gears 22, 22 meshed with the rack plates 21, which are connected to a transmission member 23. The motor 24 is driven by a motor 24.

As shown in FIG. 2, a guide roller 25 pivotally supported on the rear chassis 11 is rotatably fitted into the long hole 20 of the rack plate 21, and support rods 26, 26 protruding forward from the rear chassis 11 are fitted in the front. The front chassis 12 is horizontally supported by a guide roller 27 pivotally supported on the back surface of the chassis 12, which is rotatably mounted on the rear surface of the chassis 12. The pinions 22, 22 are rotated by the operation of the motor 24, and the rack plate 21 and the front chassis 12 are rotated. moves forward or backward.

The reel stands 14, 14 on the front chassis 12 are driven by a direct motor (not shown) provided on the back surface of the chassis 12.

A full-width erasing head 3, an audio control head 31, and a capstan 32 are provided at predetermined positions on the rear chassis 11.

When the front chassis 12 is moved back and comes into contact with the rear chassis 11 as shown by the solid line in FIG. First guide part 4
A second guide portion 5 is formed.

The first guide section 4 extends in a perfect circle from approximately the center below the cover 19 of the front chassis 12 to the vicinity of the full-width erasing head 3 through the left side of the head drum 13, and gradually slopes higher on the full-width erasing head side. A perfect circular guide groove 42 is provided over substantially the entire length of the arcuate plate 41 deployed. The second guide part 5 is the front chassis 12
from the lower center of the cover 19 of the capstan 3.
An arcuate plate 51 is disposed horizontally toward the back of the rear chassis 11 through the right side of the rear chassis 11, and a perfect circular guide groove 52 is provided over substantially the entire length of the arcuate plate 51.

The first guide part 4 is composed of a fixed guide part 4b on the rear chassis 11 and a movable guide part 4a on the front chassis side, and a tape drawer first leading guide 61 and a tape guide 62 are provided on the movable guide part 4a to project upward. A first slider 6 is slidably provided.

The second guide section 5 is composed of a fixed guide section 5b on the rear chassis 11 and a movable guide section 5a on the front chassis 12, and the movable guide section 5a includes a tape drawer second leading guide 71 and a pinch roller 73. A second slider 7 with a pinch roller support lever 72 is slidably arranged.

In the unloading state, the first and second sliders 6 and 7 are provided with soft locks formed on the movement guide parts 4a and 5a of the first and second guide parts 4 and 5, as shown in FIGS. 4 and 5. Recesses 60 in the pieces 43 and 53, respectively.
70 is fitted and movement is stopped.

Also, in this state, as shown in FIG.
9 and does not interfere with the installation of the cassette, but enters the notch in the bottom of the cassette when the cassette is installed.

A first driving member 45 is arranged below the first guide part 4 .

The first driving member 45 has a ring 44 having a curvature corresponding to the first guide part 4 rotatably arranged in a horizontal plane,
A connecting member 8 connecting the ring 46 and the first slider 6 is provided on the ring 44 as shown in FIG.
As shown in the figure, it is connected to a motor 47 via a gear train 46.

The connecting member 8 shown in FIG. 6 has a push rod 81 pivotally supported on the ring 44 so as to be able to rise and fall, the tip of the push rod 81 is slidably fitted into a guide tube 82, and is biased in the projecting direction by a spring 83. Slit groove 8 opened in tube 82
4 is engaged with a retaining pin 85 protruding from the push rod 81. A ball joint 86 is formed at the tip of the cylinder 82,
The ball joint engages with the first slider receiving portion 87.

As shown in FIGS. 5 and 6, a pair of lock claws 88, 88 are protruded from the first slider receiving portion 87.
A receiving groove 89 is formed between the lock pawls 88, 88, extending in the front-rear direction of the chassis and enlarged downwardly.

The receiving groove 89 is provided on the back surface of the first slider 6.
An engaging piece 63 that is removably fitted is provided in a protruding manner.

As is well known, the connecting member 8 is connected to the first connecting member 8 as shown in FIG.
Even if the guide part 4 is inclined gradually higher in the loading direction with respect to the ring 44, the push rod 81 of the connecting member 8 rises and pushes the slider 6, so there is no problem in driving the slider.

As shown in FIG. 4, a second driving member 55 is provided below the second guide portion 5.

The second drive member 55 has an arc-shaped rack 56 having a curvature corresponding to the second guide part 5 so as to be horizontally slidable along the second guide part 5, and a second slider locking part 57 on the rack 56. The toothed surface 56a of the rack 56 is connected to the loading motor 47 via a gear train 48, and the rack 56 and the ring 44 are rotated in opposite directions.

The second slider locking portion 57 has a pair of loadings 88, 88 protruding from the front end of the rack 56, and a receiving groove 59 extending from the front and back of the chassis is formed between the locking pieces 58, 58. An engagement piece 7 that is removably fitted into the receiving groove 59 on the lower surface of the slider 7
4 is provided protrudingly.

Straddling the rear chassis 11 and front chassis 12, there is a cassette lid lock release device 9 at the left end of the chassis.
is provided, and a lid opening device 94 is provided at the right end.

As shown in FIGS. 8 and 9, the lock release device 9 has a lock lever 91 slidably disposed on the rear chassis 11 toward the front chassis 12, and the lever 91 is constantly biased forward by a spring 92. A protrusion 93 is provided at the tip of the lever 91 and can be engaged with the lid lock piece 35 on the back side of the cassette 34.

The lid opening device 94 is for forcibly opening the lid 36 of the cassette after the lock is released. As shown in FIGS. 10 and 11, an opening lever 95 is pivotally supported on the right side plate 18a of the front chassis 12. The lower end of the lever 36 is bent inward to form a lid support piece 96.
A roller 97 is pivotally supported at the tip. On the rear chassis 11, a cam plate 98 with a downwardly inclined tip is provided at a position opposite to the roller 97 and protrudes forward.

As shown in FIG. 2, a cassette pressing roller 37 is provided above the transition path of the front chassis 12 inside the VTR main body, and the roller 37 is biased downward by a spring 38 to press the top surface of the cassette and press the front of the cassette. This prevents it from floating up from the chassis 12.

Incidentally, on the ring 44 of the first drive member 45, there is a first
Guide pin 3 that can be raised and lowered similar to the conventional example shown in Figure 2
3,33 are deployed.

However, when loading a cassette, first the front chassis drive motor 24 is activated, and the front chassis 12 is moved to the first position.
As shown by the chain line in the figure, it protrudes from the front of the VTR body.

At this time, the first and second sliders 6 and 7 are fitted and covered in the cover 19 of the front chassis 12, and the cassette is directly fitted onto the front chassis 12 which is open at the top.

The reels of the cassette fit into the reel stands 14, 14, and the cover 19a on the front chassis 12 and the first and second sliders 6, 7 fit into the notches in the bottom of the cassette.

When the motor 24 is reversed, the front chassis 12 moves rearward.

During the movement, the slope of the lock pawl 35 of the cassette 34 comes into contact with the lock release lever 91 as shown in FIGS. 8 and 9, and the lock pawl 35 moves in the direction of arrow _A2 to release the lock.

As the front chassis 12 moves further rearward, the lock release lever 91 also moves backward against the spring 92.

On the other hand, as shown in FIGS. 10 and 11, just before the front chassis 12 reaches the rear end, the roller 97 of the lid opening lever 95 rides on the slope of the cam plate 98, causing the lever 95 to rotate upward. A support piece 96 of 95 hooks the lid 36 to open it.

The rear end of the front chassis 12 abuts the front end of the rear chassis 11, and the first guide part 4 and the second guide part 5 are continuous with the front and rear chassis, respectively.

In the above state, the engaging pieces 63 and 74 of the first slider 6 and the second slider 7 fit into the receiving groove 89 of the first driving section and the receiving groove 59 of the second driving section, respectively, which are waiting.

Next, the tape loading motor 47 rotates,
The first and second drive members 44 and 55 are driven to rotate in opposite directions, with the first slider 6 moving clockwise and the second slider 7 moving counterclockwise.

tape leading guide 61 for each slider 6, 7;
71 hooks the tape and moves, and the tape T is wound around the drum 13 as in the conventional example shown in FIG.

[Brief explanation of the drawing]

Figure 1 is a plan view of the cassette loading device.
Fig. 2 is a perspective view of the same as above, Fig. 3 is a sectional view along the line shown in Fig. 2, Fig. 4 is a plan view of the second slider portion, Fig. 5 is a plan view of the first slider portion, and Fig. 6 is a plan view of the first slider portion.
The figure is a side view of the first slider part, Figure 7 is a side view of the connecting member in an upright state, Figures 8 and 9 are plan views of the lock release device, and Figures 10 and 11 are the lid opening device. FIG. 12 is a plan view of the tape mounted state. 11... Head drum side chassis (rear chassis), 12... Reel stand side chassis (front chassis), 4... First guide section, 5... Second guide section, 6
...First slider, 61...First leading guide,
7...Second leading guide, 71...Second leading guide.

Claims (1)

[Scope of utility model registration request] A first guide part 4 that guides the first tape drawer leading guide 61, a second guide part 7 that guides the second tape drawer leading guide 71, and first and second driving members that move the first and second leading guides. 45, 55, and loads the tape pulled out from the tape cassette by the first and second leading guides onto the circumferential surface of the head drum 13 in a helical shape, the chassis 1 of the device includes the head drum. A head drum side chassis 11 and a reel stand 1 arranged so as to be able to approach and separate from the head drum side chassis 11.
4 and 14, and the first guide part 4 and the second guide part 5 are constructed by the fixed guide parts 4b and 5b on the head drum side chassis 11 and the cassette receiver side chassis, respectively. This cassette loading device is composed of twelve moving guide sections 4a and 5a.