JPH0442740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape roller that pulls out a tape from a tape cassette using a tape guide moved along a predetermined movement path and loads the tape onto the circumferential surface of a rotating head drum in a helical shape. This invention relates to a deing device.

Configuration of Conventional Example and Its Problems A conventional tape loading device will be described with reference to FIG. Fig. 1 is a schematic diagram of a tape loading device for a conventional video tape recorder (hereinafter referred to as VTR). 4 is a tension post that is rotatably supported by the chassis; 5 is a P1 post that is rotatably supported by a fixed shaft (not shown) installed in the chassis; 6 is a full-width erasing head; 7 and 11 are tape guides for pulling out the magnetic tape 3 from the video cassette 2; 8 and 10 are inclined posts installed opposite to the tape guides 7 and 11; and 12 is an impedance roller rotatably supported on the chassis. , 13 is an audio oil race head, 14 is an audio control head,
15 is a magnetoresistive head (MR head), 16 is a
P4 post, 9 is a rotary head drum equipped with a rotary head (not shown), 18 is a pinch roller that can press against and separate from the capstan 17 to run or stop the magnetic tape 3, and 19 is a P5 rotatably supported by the chassis. 21 is a supply side tape guide support member, 22 is a take-up side tape guide support member, and 23 to 26 are loading arms. When switching to the tape loading mode, the loading arms 24 and 26 are rotated by a loading motor (not shown) as shown by arrow B, thereby supporting the supply tape guide support member 21 and the take-up tape guide. The member 22 is pulled out along a guide groove (not shown) as indicated by arrow C, and the magnetic tape 3 is loaded onto the circumferential surface of the rotary head drum 9 in a helical shape.

As described above, in the conventional tape loading apparatus, the loading arms 23 to 26 overlap with the video cassette during unloading, resulting in space loss, which is a major hindrance to miniaturization of the apparatus. Also, due to the friction between the tape guide support members 21, 22 and the guide groove during loading, the tape guide support members 21, 22,
There was a problem that the loss of the transmission force to 22 was large and the moving operation was not performed smoothly.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide a tape loading device that can minimize space loss and realize smooth tape loading with little transmission loss. purpose.

Structure of the Invention In order to achieve the above object, the loading device of the present invention includes a tape guide that pulls out a tape from a tape cassette by moving along a predetermined movement path and loads the tape onto the circumferential surface of a rotating head drum in a helical shape; A large gear disposed on the substrate along the predetermined movement path, a tape guide support member that supports the tape guide and has teeth, and a tape guide support member located between the large gear and the tape guide support member. A small gear that meshes with both the large gear and the teeth of the tape guide support member is provided, and by rolling and rotating the small gear in the pitch line direction of the large gear, the The tape guide support member, which is in mesh with the pinion, moves toward the movement side of the pinion by about twice the amount of movement of the pinion.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic plan view of a tape loading device for a VTR according to an embodiment of the present invention in an unloading state, and FIG. 3 is a schematic plan view of the same device in a tape loading completed state. The head drum is a head drum, and when the tape is running for recording, playback, etc., the upper drum and lower drum are fixed, and only the head mounting bar 27 to which the rotary head is attached rotates to perform recording and playback. A portion of the rotating head drum 9 is D-cut, so that when the video cassette 2 is installed in the VTR, the D cassette portion is located on the side of the video cassette 2, and rotates in the direction of arrow A at the same time as tape loading. Then, the rotating head drum 9 bites into the video cassette 2 and is fixed at the position shown in FIG. 39 is capstan 1
7, the pinch roller 18 is pressed against the capstan 17, and the tape speed is controlled.
is inclined post, 29, 30, 7, 11, 38, 4
2 and 41 are tape guides. In FIG. 4, 34 is a small gear whose shaft is fixed on the board. 44 and 43 are loading arms having teeth that mesh with the pinion 34;
3 and 35 are attached by support shafts 53 and 52. Loading arms 45 and 46 have teeth that mesh with the small gears 33 and 35, have spindles 54 and 55 at one end, and small gears 32 and 36 that mesh with the large gears 31 and 37. . Small gear 3
3 and 35 also mesh with large gears 31 and 37 installed on the board along a predetermined movement record. 2
Reference numerals 1 and 22 designate tape guide support members each having teeth that mesh with small gears 32 and 36, tape guides 7 and 11, and inclined posts 8 and 10, respectively. Fifth
In the figure, 47 is a loading motor equipped with a worm 48. The worm 48 meshes with a worm gear 50. 57 is a worm gear 50
The pin 57 and the loading arm 45 are connected by a connecting rod 49. 51 is a lever that rotates around a fulcrum 56 and includes a tape guide 30 and an inclined post 28.

Next, the operation will be explained. When video cassette 2 is not attached to the VTR, load arm 4
3, 46, 44, 45 and tape guide support members 21, 22 are stored in an overlapping manner as shown in FIG. Next, from this state, when the video cassette 2 is attached to the VTR, the loading motor 4
7 operates, the worm gear 50 rotates counterclockwise via the worm 48, and the connecting rod 49 moves in the direction of arrow B.
(FIG. 5) direction, and the loading arm 45 is moved in the tape loading direction. As a result, the loading arm 45 in FIG.
A small gear 32 provided on the board is fixed on a base plate and rotates counterclockwise by a large gear 31.
The tape guide support member 21 meshing with the large gear 31 on the opposite side is connected to the small gear 32 by the roller principle.
It moves about twice the distance, moves to position 21a, and is fixed. At the same time, loading arm 4
The small gear 33 and the loading arm 44 located between 5 and the large gear 31 are based on the same principle.
The loading arm 45 moves approximately 1/2 of the moving distance. That is, in the state shown in FIG. 2, the loading arms 44, 45 and the tape guide support member 21 are stored in an overlapping manner, and when tape loading is started, the movement of the loading arm 44 is controlled by the small gear. 33 and the large gear 31, the loading arm 45 is increased in speed by about twice as much.
By moving the small gear 32 and the large gear 31, the movement of the loading arm 45 is doubled to move the tape guide support member 21, and as a result, the loading arm 44 Tape guide support member 2 moves a distance approximately four times the amount of movement of
1 will move. Furthermore, the movement of the loading arm 44 is transmitted to the loading arm 43 via the pinion 34, and the loading arm 46 and tape guide support member 22 move in the same way as the loading arm 45 and tape guide support member 21. I will do it. Further, as the tape is loaded, the tape guide 30 and the inclined post 28 are moved to the fulcrum 5 to the positions 30a and 28a.
6, the pinch roller 18 and tape guides 42, 29 rotate around 18a, 42a, 2
It is moved to position 9a and fixed (not shown).

In the above embodiment, five small gears were used, but the number of small gears can be arbitrarily selected in consideration of the loading amount, space factor, etc.

Effects of the Invention As explained above, according to the present invention, by storing the loading arms one on top of the other during tape unloading, the space loss of the tape loading device can be minimized and the tape loading device can be downsized. At the same time, it is possible to realize a VTR in which the rotating head drum and video cassette overlap. In addition, since everything is configured by gear drive, there is little mechanical loss in each loading arm, allowing for smooth operation, and gear drive also allows the device to be made thinner.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a conventional VTR tape loading device, FIG. 2 is a schematic plan view of a tape loading device according to an embodiment of the present invention in an unloading state, and FIG. 3 is a loading diagram of the same device. FIG. 4 is an enlarged perspective view of the main parts of the apparatus, and FIG. 5 is an enlarged plan view of the main parts of the apparatus. 2...video cassette, 3...magnetic tape,
7, 11... Tape guide, 8, 10... Inclined post, 9... Rotating head drum, 21, 22...
Tape guide support member, 31, 37... large gear,
32-36...small gear.

Claims (1)

[Claims] 1. A tape guide that moves along a predetermined movement path to pull out the tape from the tape cassette and loads it in a helical manner onto the circumferential surface of the rotary head drum, and a large gear disposed on the substrate along the predetermined movement path. a tape guide support member that supports the tape guide and has teeth; and a tape guide support member that is located between the large gear and the tape guide support member and meshes with both the large gear and the teeth of the tape guide support member. The tape guide support member is provided with a small gear that is in mesh with the small gear on the opposite side of the large gear by rolling and rotating the small gear in the pitch line direction of the large gear. A tape loading device configured to move approximately twice the amount of movement of the pinion on the moving side of the pinion.