JPH0442742B2 - - 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 that is moved along a predetermined movement path and loads the tape in a helical manner onto the circumferential surface of a rotating head drum. 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 configuration diagram of a tape loading device for a conventional video tape recorder (hereinafter referred to as VTR). In the figure, 3 is a magnetic tape pulled out from a video cassette 2, 1 is a supply reel stand, and 20 is a tape loading device. Take-up side reel stand, 4 is a tension post rotatably supported by the chassis, 5
1 is a P1 post rotatably supported by a fixed shaft (not shown) embedded in the chassis, 6 is a full-width erasing head, and 7 and 11 are first tape guides for drawing out the magnetic tape 3 from the video cassette 2. ,8,
10 is a first inclined post installed opposite to the first tape guides 7 and 11; 12 is an impedance roller rotatably supported on the chassis; 13;
14 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 rotating head drum equipped with a rotating head (not shown), 18
is a pinch roller that can be pressed against and separated from the capstan 17 in order to run or stop the magnetic tape 3;
19 is a P5 post 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 tape loading mode, loading arms 24, 26
is rotated by a loading motor (not shown) as shown by arrow B, so that the supply side tape guide support member 21 and the take-up side tape guide support member 22 are moved into the guide groove (not shown) as shown by arrow C. Then, 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. In addition, in order to reduce the inclination of the rotating head drum 9 in order to make the VTR body thinner, and to minimize the total tape wrapping angle on the inclined post (fixed post) in order to improve tape running characteristics, tape guides and Added a slanted post and added a new second tape guide support member to hold it.
In VTR, loading arm 23~2
6 requires a new loading arm for loading the second tape guide support member, which has been a major hindrance to reducing the size and weight of the device.

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.

Composition of the Invention In order to achieve the above object, the loading device of the present invention has a first and second loading device that pulls out a tape from a tape cassette by moving along a predetermined movement path, and loads the tape in a helical manner onto the circumferential surface of a rotating head drum. a large gear disposed on the substrate along the predetermined movement path; a first tape guide support member that supports the first tape guide and has teeth; A two-stage gear in which two different gears are coaxially fixed to each other, one gear meshing with the large gear and the other gear meshing with the first tape guide support member; a second tape guide support member having a support shaft and supporting the second tape guide, and by causing the two-stage gear to roll and rotate along the large gear,
The first tape guide support member is configured to be moved in the moving direction of the two-stage gear.

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, FIG. 3 is a schematic plan view of the same device in a tape loading completed state, and 9 is a rotary head drum. When the tape is running during recording, playback, etc., the upper and lower drums are fixed, and only the head mounting bar 27 to which the rotary head is attached rotates to perform recording and playback. Also, this rotating head drum 9
is partially D-cut, and when the video cassette 2 is installed in the VTR, the D-cut 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, and the rotating head drum 9 is inserted into the video cassette 2 and fixed at the position shown in FIG. 39 is a capstan motor having a capstan 17, and a pinch roller 18.
is crimped onto the capstan 17 to control the tape speed, 8 and 10 are first inclined posts, 28 and 40 are second inclined posts, 7 and 11 are first tape guides, and 30 and 38 are This is the second tape guide. In FIGS. 3 to 5, 34 is a pinion whose shaft is fixed on a substrate. 44,4
Reference numeral 3 denotes a loading arm having a toothed portion that meshes with the small gear 34, and two-stage gears 33 and 35 are arranged at one end by support shafts 53 and 52, and the two-stage gear 3
3, 35 on the lower gear and the first and second
The tape guides 7, 11, 30, 38 mesh with large gears 31, 37 installed along predetermined movement paths. 45, 46 are two-stage gears 33, 3
5, and has teeth that mesh with the upper gear of the second gear.
This is a second tape guide support member having tape guides 30, 38 and second inclined posts 28, 40, and two-stage gears 32, 36 at one end are attached to a support shaft 5.
4, 55, two-stage gears 32, 36
The lower gear and large gears 31 and 37 are meshed with each other. 41 and 42 are the teeth that mesh with the upper gears of the two-stage gears 32 and 36, and the first tape guides 7 and 1.
1 and first inclined posts 8 and 10, respectively. In FIG. 6, 47 is a loading motor equipped with a worm 48. Worm 48 is worm gear 5
It meshes with 0. 57 is a pin provided on the worm gear 50, and the pin 57 and the second tape guide support member 45 are connected by a connecting rod 49.

Next, the operation will be explained. When video cassette 2 is not attached to the VTR, load arm 4
3, 44 and the first and second tape guide support members 41, 42, 45, 46 are housed in an overlapping manner as shown in FIG. Next, when the video cassette 2 is loaded into the VTR from this state, the loading motor 47 operates, and the worm gear 50 rotates counterclockwise via the worm 48.
Move the connecting rod 49 in the direction of arrow B (Fig. 6),
The second tape guide support member 45 is moved in the tape loading direction. As a result, the two-stage gear 32 provided on the second tape guide support member 45 in FIG.
The first tape guide support member 41, which rotates counterclockwise and meshes with the two-stage gear 32 and the large gear 31 on the opposite side, moves in the tape loading direction by the roller principle and moves to the position 41a. Fixed. At the same time, the two-stage gear 3 located between the second tape guide support member 45 and the large gear 31
3 and the loading arm 44 move in the tape loading direction according to the same principle. That is, in the state shown in FIG. 2, the loading arm 44 and the first and second tape guide support members 41 and 45 are stored in an overlapping manner.
When tape loading is started, the movement of the loading arm 44 is caused by the two-stage gear 33 and the large gear 3.
1, the speed is increased or decreased according to the tooth number ratio of the two-stage gear 33, and the second tape guide support member 45
move. Furthermore, the movement of the second tape guide support member 45 is accelerated or decelerated by the two-stage gear 32 and the large gear 31 according to the tooth ratio of the two-stage gear 32, and the movement of the second tape guide support member 45 is 41, and as a result, the second tape guide support member 45 and the first tape guide support member 4
1 can be arbitrarily determined by the ratio of the number of teeth of the two-stage gears 33 and 32. Further, the movement of the loading arm 44 is transmitted to the loading arm 43 by rotating the small gear 34, and the second tape guide support member 46 and the first tape guide support member 42 are transferred to the second tape guide support member 43. 45
and the same movement as the first tape guide support member 41.

In the above embodiment, four two-stage gears are used, but the number of two-stage gears can be arbitrarily selected in consideration of the loading amount, space factor, etc.

Effects of the Invention As described above, according to the present invention, each loading arm and tape guide support member can be stored in an overlapping manner during tape unloading. Further, by arbitrarily setting the ratio of the number of teeth of the two-stage gear, the amount of advancement of the two-stage gear in which each of the first tape guide support member and the second tape guide support member are meshed can be arbitrarily set. is formed, and the first tape guide support member and the second tape guide support member
The length of the teeth of the tape guide support member can be set to a length that makes the tape loading device most compact during tape unloading. In addition, tape guides and slanted Added a post and added a new second tape guide support member to hold it.
When unloading tape on a VTR,
The first and second tape guide support members are housed in a video cassette close to each other, and when loading starts, the number of teeth of the two-stage gear can be arbitrarily set, so that each tape guide can be adjusted when loading is completed. Since the position can be freely selected, the second
There is no need to add a new loading arm specifically for the tape guide, and the mechanism can be made more compact. Furthermore, there is no interference with the reel drive mechanism installed at the bottom of the video cassette, and it is possible to realize a VTR in which the rotating head drum and video cassette overlap easily.
Furthermore, since everything is constructed using a gear drive system, there is little friction loss between each loading arm and the tape guide support member, allowing smooth operation, which is also effective in making the device 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, FIG. 5 is an enlarged front view of the main parts of the apparatus, and FIG. 6 is an enlarged plan view of the main parts of the apparatus. 2...video cassette, 3...magnetic tape,
7, 11...first tape guide, 8, 10...
First inclined post, 9...Rotating head drum, 2
8, 40... second inclined post, 30, 38...
Second tape guide, 31, 37...Large gear, 3
2, 33, 35, 36... 2-stage gear, 41, 42
...First tape guide support member, 45, 46...
...Second tape guide support member.

Claims (1)

[Claims] 1 first and second tape guides that move along a predetermined movement path to pull out the tape from the tape cassette and load it helically onto the circumferential surface of the rotary head drum; A first tape guide support member that supports the first tape guide and has teeth, and two gears with different numbers of teeth are coaxially fixed to each other. a two-stage gear whose gear meshes with the large gear and whose other gear meshes with the first tape guide support member; and a second gear having a support shaft of the two-stage gear and which supports the second tape guide. and a second tape guide support member, and the two-stage gear is rolled and rotated along the large gear, so that the first
A tape loading device configured to move the tape guide support member in the moving direction of the two-stage gear.