KR19980077145A - Headdrum Assembly of Tape Recorder - Google Patents

Abstract

Of a tape recorder installed such that a donut-type rotary transformer for transmitting the information signal of the magnetic tape read by the magnetic head to the main circuit board is supported by a holder member coupled to a corresponding surface of the rotating drum and the fixed drum to face each other. A headdrum assembly is disclosed. Each rotary transformer is clamped on both sides by a pair of hooks protruding parallel to the holder member.

Description

Headdrum Assembly of Tape Recorder

The present invention relates to a head drum assembly of a tape recorder, and more particularly, to a rotary transformer installed on a corresponding surface of a rotating drum and a fixed drum in order to transmit an information signal of a magnetic tape read by a magnetic head to a main circuit board. A head drum assembly of a tape recorder with improved coupling structure.

In general, a tape recorder employing magnetic tape as a medium for recording and / or playing back image information, such as a VTR or a camcorder, has a head that rotates at high speed to record or reproduce information by scanning the magnetic head on the magnetic tape. A drum assembly is provided.

1 is a cross-sectional view schematically illustrating a head drum assembly of a conventional tape recorder, and includes a rotor motor having an upper open rotor case 113 having a ring magnet 114 installed on an inner circumferential surface thereof so as to correspond to a stator core 115. 11, a rotating drum 12 coupled to a common rotating shaft 111 so as to be rotatable by the rotor motor 11 with a magnetic head 121, and a bearing coupled to the shaft 132 of the fixed drum. It comprises a fixed drum 13 is installed on the main base (not shown) so as to rotatably support the rotating shaft 111 by 112 and is located between the rotating drum 12 and the rotor motor (11). do. Reference numerals 122 and 131 denote reference surfaces of the rotating drum 12 and the fixed drum 13, respectively, to transmit information signals of the magnetic tape read by the magnetic head 121 to the main circuit board (not shown). Donut-shaped rotary rotary transformer and fixed rotary transformer.

Coils 122a and 131a are wound around annular grooves formed to form a plurality of concentric circles on each corresponding surface of the rotary transformers 122 and 131. The coil 122a of the rotary rotary transformer is connected to the magnetic head 121, while the coil 131a of the fixed rotary transformer is connected by a printed circuit cable (FPC) and a connector (not shown). It is connected to the circuit board.

In the conventional head drum assembly having the above configuration, the rotary transformer 122, 131 is the rotating drum 12 and the fixed drum (for example, by an adhesive such as a bond so that the coil 122a, 131a) to face each other. 13 to the corresponding surfaces 123 and 133, respectively.

However, in order to increase the adhesive force of the rotary transformers 122 and 131, each of the corresponding surfaces 123 and 133 of the rotating drum and the fixed drum must be precisely processed in advance, and a long time is required for curing the adhesive. There is a problem that the productivity is lowered. In addition, when an adhesive such as bond is excessively used, the adhesive may flow out of the adhesive surface, resulting in product defects, and the working environment becomes dirty.

The technical problem to be achieved by the present invention is to improve the problems of the conventional head drum assembly, the present invention is a head drum of a tape recorder improved structure so that the rotary transformer can be easily coupled to the fixed drum and the rotating drum The purpose is to provide an assembly.

1 is a cross-sectional view schematically showing a head drum assembly of a conventional tape recorder;

2 is a schematic cross-sectional view of a headdrum assembly of a tape recorder according to an embodiment of the present invention.

Explanation of symbols for the main parts of the drawings

21. Rotor motor 22. Fixed drum

23. Rotating drum 24, 25 holder parts

211.Rotary shaft 221.Fixed rotary transformer

221c, 232c Coil 231 Magnetic Head

232. Rotary rotary transformer 242,252. No. 1 hook

243,253 .. 2nd hook

In order to achieve the above object, the head drum assembly of the tape recorder according to the present invention includes a rotating drum coupled to a common rotating shaft to be rotatable by a rotor motor having a magnetic head, and the rotating shaft being connected to a shaft groove by a bearing. The drum is rotatably supported and installed on the main base so as to be positioned between the rotating drum and the rotor motor, and the rotation so as to face each other in order to transmit information signals of the magnetic tape read by the magnetic head to the main circuit board. In one or more rotary transformers are provided in the drum and the fixed drum, respectively, The rotating drum and the fixed drum is characterized in that each of the clamping means for clamping the rotary transformer.

The clamping means includes a pair of holder members coupled to the corresponding surfaces of the rotating drum and the fixed drum, respectively, and a pair of upper and lower sides protruding from the holder member to clamp both edges of the rotary transformer at positions corresponding thereto. It is preferable to include a hook.

The holder member is formed of a hollow case member, and the hook is preferably made of an annular protrusion protruding from the inner circumferential surface of the case member.

In addition, the holder member is formed of a pair of arc-shaped plate members are installed to correspond to each other, the hook is preferably made of a pair of protrusions protruding up and down side by side from the plate member.

The hook is preferably provided with an inclined portion for guiding the entry of the rotary transformer, it is preferably formed to be flexible to flow.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view showing the head drum assembly of the tape recorder according to the embodiment of the present invention. Referring to the drawings, the head drum assembly 20 has a rotor drum 21, a magnetic head 231 is installed and the rotating drum coupled to the common rotating shaft 211 to be rotatable by the rotor motor 21 ( 23, a fixed drum 22 installed on a main base (not shown) to rotatably support the rotating shaft 211 and to be positioned between the rotating drum 23 and the rotor motor 21, and the magnetic Donut-type rotary rotary transformers respectively provided on the corresponding surfaces of the rotating drum 23 and the fixed drum 22 to transmit the information signal of the magnetic tape read by the head 231 to the main circuit board (not shown). 232 and the fixed rotary transformer 221 are configured.

Each of the corresponding surfaces 221a and 232a of the rotary transformers 221 and 232 is formed with a plurality of concentric circles having annular grooves 221b and 232b to which the coils 221c and 232c are wound. . The coil 232c of the rotary rotary transformer is connected to the magnetic head 231 and the coil 221c of the fixed rotary transformer is connected to the main circuit board by a printed circuit cable (FPC) and a connector (not shown). Connected.

In FIG. 2, reference numeral 212 denotes a stator core, and 213 denotes a ring magnet formed on an inner circumferential surface of the upper open rotor case 214 to correspond to the stator core 212.

In the head drum assembly 20 of the above configuration, the present invention is characterized in that clamping means for clamping the rotary transformers 221 and 232 are provided on the rotary drum 23 and the fixed drum 22, respectively. to be.

The clamping means protrudes from the holder members 24 and 25 coupled to the rotary drum 23 and the fixed drum 22 so as to face each other, and protrudes from the holder members 24 and 25 in parallel. First hooks 242 and 252 and second hooks 243 and 253.

The holder members 24 and 25 are formed of hollow case members. The first hooks 242, 252 and the second hooks 243, 253 protrude in an annular shape from the inner circumferential surfaces of the holder members 24, 25, and the first hooks 242, 252. The second hooks 243 and 253 clamp both sides of the rotary transformers 221 and 232 so that the rotary transformers 221 and 232 face each other at corresponding positions.

Since the holder members 24 and 25 are injection molded into a mold to have a predetermined elastic force, when the rotary transformers 221 and 232 are coupled to each of the holder members 24 and 25, the second hook ( 243) and 253 elastically flow to receive the rotary transformers 221 and 232. And the end of the second hook (243) 253, the rotary transformer so that the rotary transformer (221, 232) is easily fitted to the first hook 242, 252 and the second hook (243, 253). It is provided in a tapered shape to guide the (221) (232). In addition, it is preferable that a stage is formed on the corresponding surfaces 221a and 232a of the rotary transformer so as to conform to the second hooks 243 and 253.

In particular, since the holder members 24 and 25 are coupled to the rotary drum 23 and the fixed drum 22 by, for example, screws 241 or equivalent fastening means, no cumbersome processes such as bonding are required. In addition, since the rotary transformers 221 and 232 are fitted to the holder members 24 and 25 in one-touch manner, the assembly is very easy.

Meanwhile, in the present embodiment, the holder members 24 and 25 are hollow case members which receive the entire outer circumferential surface of the rotary transformer, and the first hook and the second hook protrude in an annular shape along the inner circumferential surface of the holder member. However, the present invention is not limited thereto. For example, it may also be configured as a pair of plate members provided in mutually opposite positions with each of the rotary transformers 221, 232 so that only a portion of the outer peripheral surface of the rotary transformers (221, 232) are accommodated. (In this case, the cross-sectional shape of the plate member is the same as the holder member shown in Fig. 2).

As described above, the head drum assembly of the tape recorder according to the present invention has a holder member provided to be coupled to a rotary transformer at an end thereof, and thus does not use a bonding agent, thereby saving time for conventional bonding hardening. Therefore, there is an advantage that the assembly productivity of the head drum assembly is improved. In addition, the working environment is clean because there is no reason for the bonding agent to flow out.

Claims (6)

A rotating drum coupled to a common rotating shaft to be rotatable by the rotor motor with a magnetic head, and the rotating shaft is rotatably supported by a bearing coupled to the shaft groove, and located on the main base so as to be located between the rotating drum and the rotor motor. A head of a tape recorder including a fixed drum installed and a pair of rotary transformers installed on the rotating drum and the fixed drum so as to face each other so as to transmit information signals of the magnetic tape read by the magnetic head to the main circuit board. In a drum assembly, Wherein said rotating drum and said fixed drum each have clamping means for clamping said rotary transformer. The method of claim 1, The clamping means includes a pair of holder members coupled to the corresponding surfaces of the rotating drum and the fixed drum, respectively, and a pair of upper and lower sides protruding from the holder member to clamp both edges of the rotary transformer at positions corresponding thereto. A head drum assembly of a tape recorder comprising a hook. The method of claim 2, The holder member is formed of a hollow case member, wherein the hook is a head drum assembly of the tape recorder, characterized in that consisting of an annular projection protruding from the inner peripheral surface of the case member. The method of claim 2, The holder member is formed of a pair of arc-shaped plate members installed to correspond to each other, the hook is a head drum assembly of the tape recorder, characterized in that consisting of a pair of protrusions protruding up and down side by side from the plate member. The method of claim 2, The hook is a head drum assembly of the tape recorder, characterized in that the inclined portion for guiding the entry of the rotary transformer is provided. The method of claim 2, And the hook is elastically formed to be movable.