KR940006859Y1 - Head drum for tape recorder - Google Patents

Abstract

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Description

Head drum of tape recorder

1 is a cross-sectional view showing a head drum of a conventional tape recorder.

(A) and (b) of FIG. 2 are a sectional view and a plan view showing the head drum of the tape recorder according to the present invention.

3 is a view showing a lead line by developing a head drum of a tape recorder according to the present invention.

* Explanation of symbols for main parts of the drawings

10: head drum 11: Upper Drum (Upper Drum)

12: Lower Drum 13: Rotary Shaft

14 flange drum 15 head

16: screw 17: boss

18: bearing 19a, 19b: cylindrical stator and rotor transformer

20a, 20b: flat stator and rotor transformer 100: head drum

30: upper drum 30a: lead line

31: boss 32: rotation axis

33: bearing 34a, 34b: flat stator and rotor transformer

40: lower drum 40a: lead line

41: boss 42: bearing

43a, 43b: flat stator and rotor transformer 50: flanged drum

51: Boss 52: Assemblyman

53: head 54: screw

60 frame 61 screw

62a, 62b: bush 63a, 63b: screw

The present invention relates to a head drum of a tape recorder, and more particularly, a head drum is manufactured by mounting a pair of stator and rotor transformers, which are manufactured in a flat shape, on upper and lower drums, respectively, to enable multi-channel signal transmission. The process was improved to improve assembly and at the same time reduce production costs.

In general, a head drum is installed on a deck in a tape driving apparatus of a tape recorder such as a video tape recorder (VTR) or a camcorder (Comcorder). The head drum is driven along a predetermined path while being rotated by the driving of a drum motor. Record the signal on the tape or play back the recorded signal.

The conventional head drum is as shown in FIG. 1, first, the head drum 10 is composed of an upper drum 11 and a lower drum 12, and the upper drum 11 A flange drum 14 having a rotary shaft 13 fitted into the center of the upper drum 11 is fitted and fixed to the center thereof. A head 15 is attached to the lower side of the upper drum 11 by tightening the screw 16.

In addition, a lower drum 12 is disposed to face the upper drum 11 in a lower direction, and a boss 17 formed at the center of the lower drum 12 includes a plurality of bearings 18. It is supported by the fitting, and is mounted on the outer periphery of the boss 17, the stator transformer (19a) made in a cylindrical shape.

In addition, a rotor transformer 19b formed in a cylindrical shape opposite to the stator transformer 19a is mounted on an inner side surface of the flange drum 14, and a stator transformer manufactured in a flat shape on an upper side surface of the low column 12. The rotor transformer 20b is mounted on the lower side of the fringe drum 14 so that 20a) is mounted and opposed thereto.

Here, the signal transmission of 6 channels or less can also be performed by using stator and rotor transformers 20a and 20b made of flat plates. This is not possible because the size of the head drum 10 is limited in the multi-channel signal transmission, so in the conventional head drum 10, the stator and rotor transformers 19a and 19b manufactured in a cylindrical shape may be used. It is delivering a signal.

However, the cylindrical stator and rotor dense 19a, 19b used in the conventional head drum 10 as described above not only acted as an increase factor in the production cost due to difficulties in manufacturing technology, but also the head. Since a high degree of precision is required in the assembly process of the drum 10, there is a problem in that the assembly of the product is lowered and the yield is reduced.

This invention is proposed in order to solve the conventional problems as described above, the object of the invention is to mount a pair of stator and rotor transformer manufactured in a flat plate to the upper and lower drum, respectively, the upper and lower By attaching the head to the flange drum mounted in the drum's internal space and rotating it, the use of flat stator and rotor transformer enables multi-channel signal transmission, improving the manufacturing process of the head drum and improving the assembly. Another object of the present invention is to provide a head drum of a tape recorder capable of improving a yield, such as a reduction in production cost of a product, than a cylindrical stator and rotor transformer used in a conventional head drum.

A feature of this invention for achieving the above object is a head drum of a tape recorder for transmitting a multi-channel signal; An upper drum having a rotating shaft supported by a plurality of bearings to be fitted to the boss, and having a flat stator and a rotor transformer mounted opposite to each other; The rotary shaft is supported by a plurality of bearings to be fitted to the boss, the upper side is located in the lower rum and the inner space formed between the upper drum and the lower drum, the plate-shaped stator and the rotor transformer are mounted opposite to each other It is in the head drum of the tape recorder consisting of a flange drum to be attached to the rotating shaft so as to be freely rotatable, and the head is attached to the lower side by fastening the screw.

Hereinafter, one preferred embodiment of the head drum of the tape recorder according to the present invention will be described in detail with reference to the accompanying drawings.

(A) and (b) of FIG. 2 are a plan view and a cross-sectional view showing the head drum of the tape recorder according to the present invention, wherein the head drum 100 is formed by opposing the upper drum 30 and the lower drum 40 to each other. The boss 31 of the upper drum 30, the rotary shaft 32 is supported by a plurality of bearings 33 to fit, a pair of stators made of a flat plate on the lower side of the upper drum 30 and The rotor transformers 34a and 34b are mounted to face each other.

At this time, the lower drum 40 is positioned so that a constant distance is maintained in the lower direction of the upper drum 30, and the bosses 41 of the lower drum 40 have a plurality of bearings 42 with a rotating shaft 32. And the rotor transformers 43a and 43b are mounted on the upper side of the lower drum 40 so as to face each other.

In addition, a flange drum 50 is positioned and installed in an inner space formed between the upper drum 30 and the lower drum 40, and an assembling hole of the boss 51 formed at the center of the flange drum 50 ( 52 is fitted so as to be freely rotatable to the boss 41 of the lower drum 40, the rotary shaft 32 is forcibly fitted at the center thereof, and the head 53 is screwed on the lower side of the flange drum 50. It is attached by the fastening of 54.

Then, the outer drum 30 and the lower drum 40, the outer periphery of the frame 60 is assembled by the fastening of the screw 61 to fix the upper drum 30 and the lower drum 40 to each other, Bushes 62a and 62b are fitted to the upper and lower ends of the rotary shaft 32, which are fitted to the bosses 31 and 41 of the upper drum 30 and the lower drum 40, respectively. 63b) for mounting.

On the other hand, as shown in FIG. 3, lead lines 39a and 40a are formed on the outer circumference of the upper drum 30 and the lower drum 40 in a predetermined form so that the tape is stable and smooth. It is possible to improve the compatibility at the same time assembling the set while driving.

Referring to the assembly process of the head drum 100 of the tape recorder according to the present invention as described above, first, the flat stator transformer 43a is mounted on the upper side of the lower drum 30, and the flange drum ( After attaching the head 53 to the lower side by tightening the screw 54 in the state in which the rotation shaft 32 is fitted to 50, the flat rotor transformer 43b is mounted.

In addition, the lower drum 40 and the flange drum 50 are assembled together, and the upper surface of the flange drum 50 is precisely processed.

After mounting the flat stator transformer 34a on the lower side of the upper drum 30 and mounting the flat rotor rotor 34b on the upper side of the flange drum 50, the flange drum Assembling the 50 and the upper drum 30, the assembly is completed by fixing the upper drum 30 and the lower drum 40 with the frame 60.

Accordingly, in the head drum 100 of the tape recorder according to the present invention, the flange drum 50 that is tightly fitted with the rotating shaft 32 by the driving of a drum motor (not shown) is rotated, and the flange drum 50 Rotation of the head 53 rotates the signal to record a signal on a tape traveling along a predetermined path, that is, the lead lines 30a and 40a formed on the outer circumference of the upper drum 30 and the lower drum 40. Alternatively, by reproducing the recorded signal, the multi-channel signal can be transmitted by using the flat stator and rotor transformers 34a, 34b, 43a, and 43b, so that the head drum 100 Not only is the manufacturing process improved but also the assembly is improved, and the production cost of the product can be reduced compared to the cylindrical stator and rotor transformers 19a and 19b used in the conventional head drum 10.

As described above, the head drum of the tape recorder according to the present invention is capable of transmitting a multi-channel signal using a pair of stator and rotor transformers manufactured in a flat plate shape, thereby improving the manufacturing process of the head drum and simultaneously assembling. This is a useful design to improve the yield, such as to reduce the production cost of the product is improved.

Claims (3)

A head drum of a tape recorder for transmitting signals of multiple channels; The upper shaft (32) is supported by a plurality of bearings (33) and fitted to the boss (31), and the lower side has an upper drum (20) in which flat stator and rotor transformers (34a, 34b) are mounted to face each other. 30); The rotary shaft 32 is supported by a plurality of bearings 42 to be fitted to the boss 41, the upper side of the lower drum to the plate-shaped stator and rotor transformers (43a, 43b) are mounted to face each other 40; It is located in the inner space formed between the upper drum 30 and the lower drum 40 and is interfitted with the rotating shaft 32 so as to be freely rotatable, the lower side of the head 53 by fastening the screw 54 Head drum of the tape recorder, characterized in that consisting of a flange drum (50) to be attached. The head of a tape recorder according to claim 1, characterized in that the frame (60) is assembled by fastening the screws (61) on the outer circumference thereof so that the upper drum (30) and the lower drum (40) are fixed to each other. drum. The screw 63a, 63b is fastened to both ends of the rotary shaft 32 which are fitted to the bosses 31 and 41 of the upper drum 30 and the lower 40, and protrudes. A head drum of a tape recorder, characterized in that the bushes (62a) and (62b) are mounted to each other by means of the mounting.