JPS63263661A - Cassette loading device for vtr - Google Patents

Abstract

PURPOSE:To make the whole device compact by providing rotatably a push-in lever pushing the tape exposed at an opening part to the back of the opening part. CONSTITUTION:At the time of loading a cassette 9 a sub-chassis 2 is located at the position apart from a main chassis 1, the tape cassette 9 is loaded on the reel bases 3, 30 on the sub-chassis 2 in this state and the cover of the cassette 9 is opened by an abutting part 25 to release the opening 91 of the cassette 9. A tape push-in lever 6 is rotated inwards with moving the sub-chassis 2 to the main chassis 1 side to push the tape exposed at an opening part 91 into the back of the opening part. When the sub-chassis 2 approaches further the chassis 1, one part of a cylinder 11 comes into the opening part 91 and the tape inside the opening part 91 is pushed-in to the back of the opening part 91 and not brought into contact with the cylinder 11.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is characterized in that a reel stand approaches and separates from a head cylinder (hereinafter referred to as a cylinder), and a part of the cylinder is inserted into an opening of a tape cassette (hereinafter referred to as a cassette). This invention relates to a VTR cassette loading device that performs tape loading by entering the device.

(Prior art and its problems) ' Conventionally, this type of VTR has a sliding chassis on the main chassis, a cylinder on the main chassis,
There is a reel stand installed on the sub-chassis (for example, Japanese Patent Laid-Open No. 59-171070). This means that the reel stand on the sub-chassis is placed in a position where the sub-chassis is retracted from the cylinder, that is, in a position where the cassette lid does not touch the cylinder. Attach the cassette to the stand and when playing,
With the cassette lid open, that is, with the cassette opening opened, move the subchassis forward toward the cylinder,
A portion of the cylinder enters the opening, making the entire device compact and making the VTR easier to handle.

(Problem to be Solved) The VTR described above has the disadvantage that the depth dimension of the VTR increases when the cassette is mounted or removed, corresponding to the receding bone of the sub-chassis.

Furthermore, since a portion of the cylinder enters the opening of the cassette, the tape exposed at the opening of the cassette inevitably comes into contact with the cylinder even before tape loading begins.
Fast-forwarding and rewinding the tape in this state has the problem of forcing the tape to run (Means for solving the problem) The present invention discloses a cassette loading device for a VTR that solves the above problem. It is something to do.

The cassette loading device of the present invention has a cylinder (11
) and a main chassis (
1) A sub-chassis (2) is provided on the chassis so as to be able to approach and separate from it in the vertical direction, and the reel stand (3) (31) and the lid (92) of the cassette (9) are mounted on the sub-chassis (2).
) to open and release the opening (91) (25)
is provided protrudingly, and the tape (93) exposed in the opening (91) is
) to the back of the opening (91).
) is rotatably arranged.

(Operations and Effects) When the cassette (9) is installed, the sub-chassis (2) is located far away from the main chassis (1), and in this state, the reel stand (3) on the sub-chassis (2) ( 31) and attach the tape cassette (9) to the contact part (2).
5) to open the lid (92) of the tape cassette (9) and release the opening (91) of the tape cassette (9).

While moving the sub-chassis (2) toward the main chassis (1), the tape pushing lever (6) is rotated inward to push the tape exposed in the opening (91) deep into the opening.

In this state, the sub chassis (2) is further connected to the main chassis (
1), and a part of the cylinder (11) enters the opening (91).

The tape inside the opening (91) is pushed deep into the opening (91) and does not come into contact with the cylinder (11).

Since the tape is fast-forwarded and rewound in the above state,
The conventional problem of fast forwarding and rewinding while the tape is wound around a cylinder is solved.

When loading the tape, press the tape push lever (6)
rotates outward in the opposite direction to the above to release the pressure on the tape, and in this state, as is known in the art, the tape leading guide (14) (
The tape is pulled out by the cylinder (11)
It is wrapped around.

When unloading the tape, use the tape leading guide (14
) (15) returns to its original position, and then the tape push lever (6) rotates inward again to push the tape into the cassette (9).
Pull the tape into the back of the opening (91) of the cylinder (
11).

In this state, connect the sub chassis (2) to the main chassis (1
) and take out the cassette (9).

The sub-chassis (2) moves vertically with respect to the main chassis (1), and when the cassette (9) is installed or removed, the thickness of the VTR increases in proportion to the thickness of the cassette (9). However, it is easier to handle than the conventional VTR in which a sub-chassis equipped with a reel stand slides on the main chassis to approach and move away from the cylinder, and the depth of the VTR varies greatly.

(Example) Before entering into the explanation of the cassette loading device, the state of the cassette and tape from insertion of the cassette to completion of tape loading is shown in Figs. 10, 11, 12, and 13.
A brief explanation will be given in order starting from the figure.

FIG. 10 is a plan view when the cassette (9) is loaded into the VTR, and the cassette loading section is located above the cylinder (11) and the opening of the cassette (9).

The lid (92) of the section (91) and the tape (93) inside the opening (91) never come into contact with the cylinder (11).

Figure 11 shows the cassette (9) in a lowered state, and on the way down, the M (92) of the cassette (9) engages, causing the pair of tape pushing levers (6) (6) to rotate inward. Then, push the tape (93) in the cassette opening (91) to the back of the opening.

Left and right tape drawer guides (12) (13), tape leading guides (14) (15), and pinch rollers (16)
has entered the tape loop, and a portion of the cylinder (11) has entered the opening (91) of the cassette (9).

Figure 12 shows the left and right tape drawer guides (12) (13).
) hooks the tape and moves outward, and the cassette (9)
The tape is pulled out on both sides of the front.

Figure 13 shows that the tape pushing lever (6) rotates outward and leaves the tape, and then the pair of tape leading guides (14)
(15) pulls out the tape to both sides of the cylinder (11), wraps the tape around the cylinder (11), and the pinch roller brings the tape into close contact with the capstan (17) to complete tape loading. .

Next, the cassette and Qi 1 loading device will be explained.

The main chassis (1) includes a cylinder (11), tape leading guides (14) (15), and a tape drawer guide (15).
12) (13) are arranged as known.

As shown in FIGS. 1 and 3, a sub-chassis (2) is attached to a main chassis (1) so as to be able to approach and separate from the main chassis (1) in a vertical plane.

The subchassis (2) has downward guide legs (2B) at the four corners.
The legs are slidably fitted into a guide tube (18) (1B) provided on the main chassis (1). The guide cylinder also serves as a height positioning member for regulating the descending height of the sub-chassis (2).

A notch (27) into which a part of the cylinder (11) fits is provided on the side edge of the sub-chassis (2) on the cylinder (11) side.

Both ends of the sub-chassis (2) and both ends of the main chassis (1) are connected by X-shaped links (23), and each end of the link (23) on the main chassis (1) side is connected to a groove formed in the chassis. The link is slidably engaged with the hole (19), and the other end of the link is pivotally supported by the subchassis.

The tips of the links engaged in the slots (19) are connected by a tension spring (24), and the direction in which the links are always extended is
That is, the sub-chassis (2) is urged in a direction away from the main chassis (1).

A loading motor and a cam device (none of which are shown) are connected to the X-shaped link (23), and a spring (14) is connected to the X-shaped link (23).
Retract the link (23) to lower the subchassis (2) or extend the link (23) to lower the subchassis (2).
2) Increase.

The subchassis (2) includes a supply reel stand (3), a take-up reel stand (31), and between both reel stands (3) (31),
A known oscillating idler device (21) for selectively rotating the reel stand (3) <31) is provided.

Furthermore, the base end of a tape push lever (6) is pivotally supported on both ends of the sub-chassis (2) on the side of the cylinder (11) so as to be rotatable in a plane parallel to the chassis.

A roller <61) that contacts the tape is provided at the free end of the tape push lever (6) to freely rotate and protrude upward.

As shown in Figures 1 and 2, an axially long gear (63) is fitted and fixed to the support shaft (62) at the base end of the tape push lever (6), and the gear is rotated by the main chassis (1). axially slidably fitted.

A drive gear (84) that meshes with the gear (63) is provided on the main chassis (1), and the drive gear is connected to a motor (
(not shown).

When the sub-chassis (2) approaches the main chassis (1), the gear (63) on the support shaft (62) of the tape push lever (6) slides downward while meshing with the drive gear (64). The gears (63) and (64) never come out of mesh.

A cassette holder (2) is arranged on the sub-chassis (2) via a link mechanism (1) so as to be able to approach and separate from the sub-chassis (2).

The mounting structure of the cassette holder is the same as that of a conventional hop-up type cassette loading holder, and when the holder is pushed down, it descends until it touches the subchassis (2) and is automatically locked.

When the holder (7) approaches the sub-chassis (2), the diamond (9) of the cassette (9) is attached to the sub-chassis (2).
2) The contact part (25) that opens the II (92) upon contact
is installed protrudingly.

Factor 6, FIG. 7 shows the tape pack tensioning device (4) connected to the supply reel stand (3).

The pack tension device (4) has a bush (20) fixed to the sub-chassis (2) that freely rotates through the rotary support shaft (31) of the supply reel stand (3), and has a disc (4) at the end of the through-hole.
1) is fixed, and a plurality of leg pieces (42) are provided to protrude downward from the disc.

A rotary body (43) is rotatably supported on the main chassis (1) at a position corresponding to the supply reel stand (3), and a lip (44) is provided projecting on the diameter line of the rotary body.

Tension brake band (45) on rotating body (43)
is wound, one end of the band is locked to the locking piece (48) on the main chassis (1), and the other end is locked to the locking piece (48) on the main chassis (1).
) Rotatably located on the tape drawer lever (46
).

The tape pull-out guide (12) on the left side is rotatably supported on the free end of the tape pull-out lever (46). A forced drive device (not shown) that can rotate the lever is connected to the lever, and a spring (47) that slightly biases the lever outward when the lever is in its neutral position is connected.

When the sub-chassis (2) is lowered, the claw piece (42) on the rotation support shaft (31) of the supply reel stand (3) moves to the rotating body (43).
the tape pull-out lever (46).
The movement of the lever due to the tape tension acting on the brake band (45) tightens or loosens the brake band (45), and the rotating body (43)
and the supply reel stand (3) to keep the tape tension constant.

8 and 9 show the brake device (5) of the reel stand (3) (31).

The configuration of the brake device (5) itself is the same as the conventional one, with a pair of brake levers (51) (
52) is swingably arranged, both levers are connected by a spring (53), and a brake lever drive device (not shown) is provided.
Connect.

The sub-chassis (2) has penetration parts (22) (22) into which the brake shoe attachment parts (54) (54) of the brake levers (51) (52) fit when the chassis is lowered.
) is provided.

Therefore, when the sub-chassis (2) is lowered, the brake shoe attachment portion (54) passes through the penetration portion (22) and corresponds to the side surface of the reel stand (3) (31).

The brake lever drive device operates according to each mode of the VTR, and the brake levers (51) and (52) operate on both sides (
3) Release the brake of (31) or remove both reel stands (3).
) (31), or either one of the reel stands can be braked.

The pack tension device (4) and the reel stand brake device (5) can be installed on the sub-chassis (2), but since the sub-chassis (2) moves up and down, many mechanisms are mounted on the chassis. This means that the overall structure becomes complicated.

If the pack tension device (4) and the reel stand brake device (5) are arranged on the main chassis (1) as in the embodiment, the configuration can be simplified.

However, as shown in Fig. 3, when the tape cassette (9) is inserted into the cassette holder (7) in the raised position and the cassette holder (7) is pushed downward, it hits the subchassis (2) as shown in Fig. 4. Cassette (9) in section (25)!
! (92) hits and the lid (92) opens.

When the cassette holder (7) is pushed to the locked position, a switch (not shown) is turned on and the subchassis (2) begins to descend.

At this time, the brakes of the reel stands (3) and (31) are released, and the tape pushing lever (6) rotates inward to expose the tape (93) to the opening (91) of the cassette (9).
) into the back of the opening (91) (Fig. 10 → 1st
Figure 1).

As shown in Figure 5, the cassette (9) further descends and the opening (9)
1), the cylinder (11) enters into the tape loop, and the left and right tape pull-out guides (12) (13), the left and right tape leading guides (14) (15), and the pinch roller (
16) enters and the loading of the cassette is completed.

Next, the left and right tape drawer guides (12) and (13) rotate outward to enter the tape loading standby state (FIG. 12).

This state is also the tape fast forward and rewind mode state. The tape is attached to the rollers (61) of the left and right drawer guides (12) (13) and the left and right push levers (6) (6).
(61) and not in contact with the cylinder (11), and the guides (12) and (13) and rollers (61 and 61) are all in contact with the tape and rotate by friction, so the tape The load on the tape is small, and there is no disturbance in the high-speed running of the tape during fast forwarding or rewinding.

From the state shown in Figure 12, tape leading guide (14) (15)
Then, the pinch roller (16) moves to the cylinder (11) side, winds the tape around the cylinder (11), brings the tape into close contact with the capstan (17), and completes tape loading.

Tape unloading and cassette unloading are performed in the reverse order of operation.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the claims.

[Brief explanation of the drawing]

Fig. 1 is a slope view of the cassette loading device, Fig. 2 is a slope view of the cassette loading device with the reel stand lowered, Figs. 3, 4, and 5 are explanatory diagrams of the operation sequence of cassette loading, Fig. 6 is a sectional view of the pack tension device, Fig. 7 is a slope view of the same as above, Fig. 8 is a slope view of the reel stand braking device, and Fig. 9 is a cassette loading device with the brake applied to the reel stand. Slope map, 1st
0, FIG. 11, FIG. 12, and FIG. 13 are explanatory diagrams showing the operational order of cassette loading and tape loading. (1) Main chassis (11) Cylinder (14) (15) Tape leading guide (2)
Subchassis (25)...Attaching part (6)...
Tape push lever (9)...Tape cassette (91)...Opening $
Figure 7

Claims (1)

[Claims] [1] In a VTR that performs tape loading with a part of the cylinder (11) inserted into the opening (91) of the tape cassette (9), the cylinder (11) and the Tape leading guide for wrapping tape around the cylinder (
14) A sub-chassis (2) is provided on the main chassis (1) in which (15) is installed so as to be able to approach and move away from the chassis in the vertical direction, and a reel stand (3) is provided on the sub-chassis (2).
) (31), a contact part (25) is provided for opening the lid (92) of the tape cassette (9) to release the opening (91),
Furthermore, the tape exposed in the opening (91) is inserted into the opening (91).
) A cassette loading device for a VTR, characterized in that a push-in lever (6) is rotatably arranged to be pushed into the back of the cassette-loading device. [2] A cassette loading device for a VTR according to claim 1, wherein a roller (61) that rotates by friction in contact with the tape is protruded from the free end of the push lever (6) so as to rotate freely.