JPS6310497B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small, thin, and lightweight magnetic recording/reproducing device.

A tape driving and operating method for a conventional magnetic recording/reproducing device includes: a rotating cylinder on which a magnetic head for recording and reproducing video signals is mounted; a cylinder motor for stably rotating the rotating cylinder at a constant speed;
A capstan for driving the magnetic tape at a constant speed, a capstan motor for stably rotating the capstan at a constant speed, a reel motor for fast forwarding and rewinding the tape between reels, and a cylinder for moving the tape. It is generally provided with a loading motor etc. for winding the wire around the wire.

Furthermore, in order to stably drive the tape, the capstan was equipped with a large flywheel that rotated integrally with the capstan, resulting in a larger product.

In order to reduce the floor space of a device that uses a capstan motor and a capstan flywheel, a capstan direct drive motor system was devised in which the capstan was used as the motor shaft and the flywheel effect was used as a rotor magnet. However, because the capstan rotation speed is low,
In order to obtain stable rotation, a large diameter rotor is required, which increases the size of the product and has little effect on weight reduction.

An object of the present invention is to provide a magnetic recording/reproducing device that can be made smaller, thinner, and lighter by eliminating the drawbacks of the prior art products described above, which make it difficult to reduce the size and weight of the products.

In order to achieve the above object, the present invention uses one drive source for a capstan to feed the tape at a constant speed during recording and playback, and one drive source for the reel to wind the tape onto each reel during fast forwarding and rewinding of the tape. The rotation direction and speed of the motor are controlled according to the operating conditions during recording, playback, fast forwarding, and rewinding, and the motor is flat in shape, with a rotor magnet inside the motor. By making it flat and large in diameter, we have realized a smaller flywheel on the capstan shaft as a tape drive motor structure that increases driving force by effectively utilizing magnetic force and smoothes rotation by increasing inertia. The cylinder has a thin structure, and a thin rack made of flexible material is used as the drive means for the tape pull-out member of the tape loading mechanism, thereby making the VTR smaller, lighter, and thinner. be.

Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 1 is a plan view showing the overall configuration of a magnetic recording/reproducing apparatus according to the present invention in a stopped state, and FIG. 2 is a plan view showing the same recording and reproducing state as in FIG. 1. FIG. 3 is a schematic front view showing the overall configuration according to the present invention. FIG. 4 is a perspective view showing the main parts of the tape drive mechanism according to the present invention, FIGS. 5a and 5b are views showing the main parts of the tape loading mechanism according to the invention, and FIG. This is an example of the main parts of a conventional VTR loading mechanism shown for reference. Figure 7 is a sectional view showing the structure of a flat small cylinder, and Figure 8 is a conventional
FIG. 1 is a sectional view of an embodiment showing the cylinder structure of a VTR.

In an embodiment of the present invention, the large direct drive capstan motor and reel motor in the conventional mechanism are integrated and placed in the position of the reel motor in the conventional mechanism, in order to create a compact, lightweight, and flat mechanism. (shown in Figure 4),
The rotation direction and rotation speed of the motor are controlled to handle each operating condition, and as a result,
Compared to a VTR mechanism, the number of parts has been significantly reduced and the structure has been made smaller, the motor structure has been flattened, the cylinder structure has been made thinner, and the loading mechanism has been made simpler and thinner, all of which are not possible with conventional VTRs. It has a smaller, thinner mechanism with full-fledged portability. In FIGS. 1 to 3, 13 is a chassis, and 14 is a rotating cylinder of the direct drive. 15 is Capstan, 16
is a pinch roller; 17 is a motor for driving the capstan 15 and reels 20, 21;
Reference numeral 18 denotes a rotating body having a gear or roller section for fast forwarding and rewinding that rotates integrally with the motor 17 on the rotation axis of the motor 17, and a belt transmission pulley section for driving the capstan 15. Reference numeral 19 denotes an idler 22 connected to the gear or roller portion of the rotating body 18, and 23 refers to a capstan pulley in which the capstan 15 is set up; 23 spans the capstan pulley 22 and the rotating body 19; A capstan belt that rotates the capstan is shown. Reference numeral 24 denotes a feed-out side guide for pulling out a magnetic tape from a cassette magazine (not shown) placed in the magnetic recording/reproducing device, winding it around the cylinder 14, and bringing the tape to a travel regulation position (hereinafter referred to as loading). The post member 25 is also a guide post member on the winding side. 29 is a guide post positioning member for holding and positioning the feed-side guide post member 24 in order to wrap the tape around the cylinder 14 and run it to a predetermined position; 30 is a guide post positioning member for holding and positioning the feed-side guide post member 24; This is a guide post positioning member for holding and positioning the member 25.

FIG. 4 is a perspective view showing in detail the tape drive unit, which is one of the simple and compact mechanisms of the present invention, and shows the capstan motor conventionally used for driving the capstan 15, the reel 20, 21
The reel motors for driving the motors are integrated and arranged as one motor 17. The capstan 15 is driven by a capstan belt 23, and the reel is driven by an idler 19. A numeral 31 transfers the tape driven by the capstan 15 and pinch roller 16 to the take-up reel 21 during recording and playback. This is an idler for winding, and the drive is transmitted from the capstan pulley 22. In this way, each drive transmission section is arranged close to each other, thereby minimizing the area occupied by the mechanism.

FIG. 5 shows the main parts of a tape loading mechanism made of flexible material, which is a component of the flattening mechanism of the present invention, and is compared with the main parts of the tape loading mechanism in the conventional mechanism shown in FIG.

26 is engaged with the guide post member 24 on the unwinding side and is housed in a groove provided on the chassis 13, and the movable flexible rack 27 is engaged with the guide post member 25 on the winding side. Shows flexibility. A pinion 28 drives the racks 26 and 27 in synchronization.

In FIG. 6, 32 to 37 are chain members of a loading mechanism in a conventional VTR, 38 is a loading worm for driving the chain members 32 to 37, and 39 and 40 are loading worms for winding up the chain members 32 to 37. Showing the wheels.

In this way, with the conventional loading mechanism,
As the number of parts increases, such as by connecting chains, each part is arranged in the thickness direction by joining and stacking.
It was difficult to make the structure thinner. On the other hand, the fifth
If the rack made of flexible material shown in Figures a and b is used, the mechanism can be simplified by integral molding of the rack, and the device can be made smaller and thinner.

FIG. 7 shows an example of a cylinder structure used in the present invention, and FIG. 8 shows a conventional VTR cylinder structure.
In Fig. 7, 14-1 is the rotation axis of the cylinder;
14-2 is a motor unit having the cylinder rotation shaft 14-1 as a common rotation axis; 14-3 is a fixed cylinder having a member to be fixed to the chassis; -1 shows a rotating cylinder that rotates integrally with 1. 14-5 and 14-6
indicates a bearing that supports the rotating shaft 14-1. In Fig. 8, 2-1 is the rotating shaft of the conventional cylinder structure;
Similarly, 2-2 is a fixed cylinder, 2-3 is a rotating cylinder, and 2-4 and 2-5 are bearings. In the cylinder used in the present invention, the bearings 14-5 and 14-6 are attached to the motor 14 in order to improve the rotational performance of the cylinder by having a long bearing point, and to have a flat structure.
-2 and fixed cylinder 14-3 to reduce the thickness of the mechanism.

With this configuration, the bearing 14-
The length L between 5 and 14-6 can be made longer than in the conventional configuration, making the overall length shorter and thinner. Note that 14-7 is a rotary transformer used for transmitting signals between the video head and the circuit section;
-8 is a stator coil of the motor 14-2.

Next, the operation of the present invention will be explained.

When a recording or reproducing operation is performed from the stopped state shown in FIG. is driven in the direction of arrow C. (See Figure 5) The above rack 26,
27, the feeding-side guide post member 24 engaged with the rack 26 and the winding-side guide post member 25 engaged with the rack 27 also move toward the shaft 1.
The tape is pulled out from inside the cassette half while being guided by a guide groove provided on the cylinder, and the tape is driven to a predetermined position where the cylinder is wound, and is held in the state shown in FIG. In this way, in the tape loading method, the mechanism can be simplified and flattened by the mechanism for advancing and retracting the guide post members 24 and 25 using the flexible racks 26 and 27, as shown in FIG. becomes.

In addition, in order to run the loaded tape, as shown in FIG. 23, the capstan 15 is rotated in the direction of arrow H to drive the tape. The tape driven by the capstan 15 and the pinch roller 16 is wound onto the take-up reel 21 by a take-up idler 31.
in the direction of the arrow, and then move the capstan pulley 2.
2 and the roller portion 21-2 of the take-up reel 21, and the take-up reel 2
1 by rotating it in the direction of arrow H. At the same time, the gear 18-2 on the motor shaft 17-1 also rotates in the direction of arrow D, causing the idler gear 19-1 meshed with the gear 18-2 to rotate in the direction of arrow R. However, the swinging of the idler gear 19-1 in the direction of the arrow N about the pivot shaft 19-3 installed on the chassis is prevented by the intervention of a member (not shown) that restricts the range of swing. The gear portion 21-1 of the take-up reel 21 is blocked by the
is restricted from engaging with the

Next, during fast forwarding, the capstan 15 is rotated in the direction of arrow H by the rotation of the motor 17 in the direction of arrow 2 in the same manner as during recording or reproduction, but the pinch roller 16 is pressed against the capstan 15 and the take-up reel of the take-up idler 31 is rotated. The capstan 15 continues to idle due to the mechanism that does not allow it to engage with the capstan 21. Due to the rotation of the gear 18-2 in the direction of the arrow 2, the idler gear 19-1 meshed with the gear 18-2 rotates in the direction of the arrow 2, and the rotational force obtained by the rotational force of the idler gear 19-2 rotates around the rotation support shaft 19-3 as an axis. The rotation in the direction of arrow Z meshes with the gear portion 21-1 of the take-up reel 21, rotates the take-up reel 21 in the direction of the arrow H, and the tape is wound onto the take-up reel 21 from the feeding reel 20.

During the rewinding operation, the capstan 15 is idled in the same way as during the fast forwarding operation, and the idler gear 19-1 is rotated in the opposite direction of the arrow L by the rotation of the motor 17 in the opposite direction of the arrow D, and the gear portion 20-1 of the feed reel 20 is rotated. The feed reel 20 is rotated in the direction of the arrow R, and the tape is transferred to the take-up reel 2.
1 to the feed reel 20.

As described above, by employing an integrally molded flexible rack mechanism for the tape loading mechanism, the number of parts can be reduced and the mechanism can be made flat and compact. In addition, the tape drive mechanism is equipped with a motor that drives the capstan or reel by controlling the rotation direction and rotation speed depending on the operating state of the tape drive between both reels, thereby reducing the floor space of the mechanism configuration. Can be reduced. Moreover, the motor shape is a flat motor, and the mechanism is made thin. Along with these measures, by making the cylinder thinner and using the direct drive system, these mechanism configurations allow VTRs to be made smaller, lighter, and thinner.

[Brief explanation of the drawing]

1 and 2 are plan views of the overall structure of the magnetic recording/reproducing device mechanism according to the present invention, with FIG. 1 showing the stopped state and FIG. 2 showing the recording or reproducing state. FIG. 3 is a schematic front view showing the overall configuration of the present invention, FIG. 4 is a perspective view showing the main parts of the tape drive mechanism according to the present invention, and FIG. 5 is a diagram of the tape loading mechanism according to the present invention. Main parts are shown, with a being a plan view and b being a front view. FIG. 6 is a plan view showing the main parts of a conventional loading mechanism, FIG. 7 is a sectional view showing the structure of a flat small cylinder, and FIG. 8 is a sectional view showing the structure of a conventional cylinder. 14...Cylinder, 15...Capstan, 1
7... Motor, 18... Rotating body, 19... Idler, 24, 25... Guide post member, 26, 2
7...Rack, 28...Pinion.

Claims (1)

[Claims] 1. In a magnetic recording and reproducing device, a single motor is connected to a pair of motors that supply a driving source for a capstan to feed the tape at a constant speed during recording and reproducing, and a power source for winding the tape onto a reel during fast forwarding and rewinding. A flexible mechanism that is placed between the reels and controls the rotational speed and direction of the motor by each tape drive operation, and serves as a tape mounting mechanism for winding the tape around a cylinder during recording and playback. Due to its nature, a pair of integrally molded racks are synchronized by engagement with a pinion and driven along a guide groove provided on the chassis.The motor and mounting mechanism are of a flat structure, and a thin direct A magnetic recording/reproducing device characterized by mounting a rotating head cylinder using a drive method.