KR19990028278U - Video head connector of the head drum assembly - Google Patents

Abstract

The present invention relates to a video head connecting device of the head drum assembly. Conventionally, the connection between the rotary transformer and the video head of the head drum assembly is performed by soldering the end of the coil drawn out from the rotor transformer, resulting in deterioration in workability and deterioration in recording and playback characteristics.

According to the present invention, a circuit board is attached to the upper surface of the rotor transformer and the lower surface of the video head, respectively, the snap hook of the holder is coupled to the coupling hole of the upper drum, the connector of the conductor is fixed to the fixing protrusion of the holder, and the first connector of the connector And the second elastic piece are respectively connected to the circuit boards of the rotor transformer and the video head by elastic deformation. Therefore, since the rotor transformer and the circuit board of the video head are easily connected by a connector having a simple configuration and structure, the assembly performance of the product is improved, the reproduction and recording characteristics are improved, and the image quality is clearly improved. Reliability is improved.

Description

Video head connector of the head drum assembly

The present invention relates to a head drum assembly, and more particularly, to a video head connection device of a head drum assembly for connecting a video head.

In general, a tape recorder such as a video cassette recorder (VCR) or a camcorder (camcorder) is a cassette that travels along a certain traveling path of the traveling system by the rotation of the head drum assembly installed on the top of the deck. To record or play back video and audio signals on tape. In addition, the head drum assembly of the tape recorder adopts a so-called helical scan type in which the video head is rotated obliquely while the tape is rolled and driven.

One example of such a head drum assembly will be described with reference to FIG. 1. In the head drum assembly 10, an upper drum 11 and a lower drum 12 have upper and lower portions of the shaft 13. The lower drum 12 is supported and mounted by two bearings 14a and 14b, respectively.

In addition, a rotary transformer (rotary) 15 for transmitting a video signal is mounted in the space between the upper drum 11 and the lower drum 12. The rotary transformer 15 is composed of a rotor transformer 15a attached to the lower surface of the upper drum 11 and a stator transformer 15b attached to the upper surface of the lower drum 12, and the rotor and stator transformers 15a and 15b. Are interposed so that a constant air gap is maintained on the opposite surface.

Then, two or more video heads 16 are assembled on the lower surface of the upper drum 11, and the video heads 16 are coiled by a coil 17 drawn from the rotor transformer 15a. Are connected in a corresponding relationship with each other. A drum motor 17 is installed below the lower drum 12, and the upper drum 11 is rotated together with the shaft 13 according to the driving of the drum motor 17. The action causes recording or reproduction of a video signal to tape.

However, the connection of the rotary transformer 15a and the video head 16 of the head drum assembly 10 as described above is performed by soldering the end of the coil 17 withdrawn from the rotor transformer 15a. Because there was a troublesome work. That is, since the coil 17 is relatively thin in diameter, when the soldering of the coil 17 automatically occurs, disconnection is easily generated, and thus, the connection 17 may be troublesomely performed by the worker's manual work. There is a situation.

In addition, when the coil 17 is soldered, the remaining flux component is melted in a high temperature environment, and the flux component is scattered to the video head 16 side during the rotation of the upper drum 11 and adheres to the surface. This not only adversely affects the recording and reproducing characteristics of the video head 16, but also causes a problem of lowering image quality, such as causing the coil 17 to be relatively long, causing noise.

On the other hand, in the case of a multi-channel head drum assembly in which about 3 to 5 video heads 16 are employed, the diameter of the rotary transformer 15 is made relatively large so that the coil 17 is connected to the video head 16. It is assembled into a structure that is difficult to solder directly to the. Therefore, for connecting the video head 16, a circuit board (not shown) is mounted on the upper drum 11 and soldered using this circuit board and a connector leader. The use of such a circuit board and a connector reader has a problem in that a configuration and a structure become complicated, thereby degrading product assembly.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is that the video head is simply and easily connected to improve the assemblability, the image quality is improved to improve the reliability of the product It is to provide a video head connecting device of the head drum assembly as possible.

1 is a cross-sectional view showing an example of a general head drum assembly,

2 is a cross-sectional view showing a video head connecting device of the head drum assembly according to the present invention;

3 is a perspective view partially showing a video head connecting device according to the present invention;

4 is a cross-sectional view showing a connected state of a video head connecting device according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

20: head drum assembly 21: upper drum

22: lower drum 23: shaft

30: rotary transformer 35: video head

50: holder 51: fixed plate

55: fixing protrusion 60: connector

61 and 62: first and second elastic pieces 61b and 62b: connection head

In order to achieve the above object, a feature of the present invention is a head drum assembly for performing recording and reproduction of a video signal, comprising: an upper drum having a coupling hole formed at one side thereof; A rotor transformer attached to a lower surface of the upper drum and having a circuit board attached to the upper drum; A video head assembled to a lower surface of the upper drum and having a circuit board attached to the lower surface of the base so as to be coaxial with the circuit board of the rotor transformer; A snap hook is formed on an upper surface of the fixing plate so that the coupling holes of the upper drum are coupled to each other in a corresponding relationship. A holder formed; A video head connection device of a head drum assembly comprising a connector of a conductor fixed to a fixing projection of a holder such that a circuit board of a rotor transformer and a circuit board of a video head are connected in a corresponding relationship with each other.

Hereinafter, one preferred embodiment of a video head connecting apparatus of a head drum assembly according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 4 are views for explaining the video head connection device of the head drum assembly according to the present invention.

First, referring to FIGS. 2 and 3, the head drum assembly 20 has an upper drum 21 and a lower drum 22 mounted on upper and lower portions of the shaft 23, respectively. The upper drum 21 is press-fitted into the upper portion of the shaft 23 is mounted so as to rotate freely with the shaft 23, the one side of the upper drum 21 is formed so that two or more coupling holes (21a) to correspond to each other, The lower drum 22 is supported and mounted by two bearings 24a and 24b.

In addition, in the space between the upper drum 21 and the lower drum 22, a rotary transformer 30 for transmitting a video signal in a contactless manner is mounted. The rotary transformer 30 is composed of a rotor transformer 31 attached to the lower surface of the upper drum 21 and a stator transformer 32 attached to the upper surface of the lower drum 22. The rotor and stator transformers 31 and 32 Are interposed so as to maintain a constant void on the opposite surface. A plurality of channels 31a and 32a are formed on the opposing surfaces of the rotor and stator transformers 31 and 32 to form concentric circles, respectively, and coils are formed in the channels 31a and 32a of the rotor and stator transformers 31 and 32, respectively. 31b and 32b) are respectively wound up. On one side of the upper surface of the rotor transformer 31, a circuit board 33 to which the end of the coil 31b is connected is attached.

Then, two or more video heads 35 are assembled to the lower surface of the upper drum 21 so as to correspond to each other, and the circuit board 37 is attached to the lower surface of the base 36 of the video head 35. . Here, the video head 35 is assembled to be adjacent to the engaging hole 21a of the upper drum 21, and the engaging hole 21a of the upper drum 21 is formed by numbers corresponding to each other with the video head 35. do.

In addition, the circuit board 33 of the rotor transformer 31 and the circuit board 37 of the video head 35 are attached so as to be located coaxially. The drum motor 40 is installed at the lower part of the lower drum 22, and the upper drum 21 is rotated together with the shaft 23 according to the driving of the drum motor 40 by the action of the video head 35. Recording or reproduction of a video signal is performed on the tape.

As shown in FIG. 3 and FIG. 4, a holder 50 is assembled to the lower surface of the upper drum 21. The holder 50 has a fixing plate 51 fixed to the lower surface of the upper drum 21, a snap hook 52 is formed on one side of the upper surface of the fixing plate 51, and the snap hook 52 is an upper drum. The coupling holes 21a of the 21 are fitted and engaged in a relationship corresponding to each other, whereby the holder 50 is firmly fixed to the lower surface of the upper drum 21 to be assembled.

The holder 50 has the support plate 53 extended downwards on one side of the fixed plate 51, and the side plate 54 extends downward on one side of the fixed plate 51. That is, the holder 50 is formed in a substantially L-shape in the front and the bottom by the fixing plate 51 and the support plate 53, the side plate 54 is formed here. In addition, although the fixing protrusion 55 protrudes from the inner surface of the side plate 54 and the fixing protrusion 55 has a cross section, the shape of the fixing protrusion 55 may be appropriately changed to a circle or the like. have.

On the other hand, the circuit board 33 of the rotor transformer 31 and the circuit board 37 of the video head 35 are connected to each other by a plurality of connectors 60. The connector 60 is made of a conductor, and the connector 60 is such that the first elastic piece 61 and the second elastic piece 62, which are elastically deformable, are connected by the connecting piece 63. Is formed. That is, the connector 60 is formed such that the first and second elastic pieces 61 and 62 are integrally formed by the connecting piece 63 to form an approximately C-shaped shape with one side open, and the connecting piece 63 has a fixed space therein. Has 64.

The first and second elastic pieces 61 and 62 have free ends 61a and 62a, and at the free ends 61a and 62a, the circuit board 33 of the rotor transformer 31 and the circuit of the video head 35 are provided. Connection heads 61b and 62b are formed on the substrate 37 so as to correspond to each other. In addition, the connector 60 is fixed to the fixing space 64 of the connecting piece 63 is fixed to the fixing projection 55 of the holder 50, the outside of the connecting piece 63 to the support plate 53 of the holder 50 Supported.

The connection state of the head drum assembly according to the present invention as described above with respect to the video head connection device is as follows.

As shown in FIG. 4, in the state where the video head 35 is assembled to the lower surface of the upper drum 21 by fastening, the snap hook 52 of the fixing plate 51 is engaged with the engaging hole 21a of the upper drum 21. ) Is fitted in a corresponding relationship to each other, the holder 50 is firmly assembled to the lower surface of the upper drum (21). When the fixing space 64 of the connector 60 is inserted into the fixing protrusion 55 of the holder 50, the outside of the connecting piece 63 is supported by the support plate 53 of the holder 50 while the connector 60 is supported. ) Position is correctly set and fixed.

When the rotor transformer 31 is attached to the lower surface of the upper drum 21 by an adhesive or the like, the connection head 62b of the second elastic piece 62 is attached to the rotor transformer 31 by attachment of the rotor transformer 31. The elastically deformed by being pushed upward while being in contact with the circuit board 37 of the first and second elastic pieces 61 and 62 are elastically deformed, thereby connecting the connection heads (61b, 62b) to the rotor transformer (31). Circuit board 33 and the circuit board 37 of the video head 35 are respectively connected in a corresponding relationship.

In this way, the circuit board 33 of the rotor transformer 31 and the circuit board 37 of the video head 35 are connected to each other by the connector 60 so that the recording or reproducing of the video head 35 is possible. This simple and easy improvement improves the assembly of the product significantly. In addition, the use of the connector 60 not only removes the flux components remaining by soldering the conventional video head 16, but also allows the rotor transformer 31 and the video head 35 to be relatively short by the connector 60. It is connected by distance, so as not to be affected by noise, and as a result, recording and playback characteristics are improved, and image quality is clearly improved. In particular, the present invention can connect the rotor transformer 31 and the video head 35 with a simple configuration and structure even in a multi-channel head drum assembly, thereby improving product assembly.

On the other hand, the above-described embodiment is merely to describe one preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and can be changed appropriately within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, in the video head connection device of the head drum assembly according to the present invention, since the rotor transformer and the circuit board of the video head are easily connected by a connector having a simple configuration and structure, the assemblability of the product is remarkable. In addition to the improvement, the reliability of the product is improved, such as the reproduction and recording characteristics are improved and the image quality is clearly improved.

Claims (2)

A head drum assembly for performing recording and reproduction of video signals, An upper drum 21 having a coupling hole 21a formed at one side thereof; A rotor transformer 31 attached to a lower surface of the upper drum 21 and having a circuit board 33 attached to an upper surface thereof; The video head 35 is assembled to the lower surface of the upper drum 21 and has a circuit board 37 attached to the lower surface of the base 36 so as to be coaxial with the circuit board 33 of the rotor transformer 31. )Wow; A snap hook 52 is formed on an upper surface of the fixing plate 51 so as to be coupled to the coupling hole 21a of the upper drum 21 in a corresponding relationship, and a support plate (1) is directed downward on one side of the fixing plate 51. A holder 50 having a side plate 54 having a fixing protrusion 55 downwardly formed at one side of one side of the fixing plate 51; The connector of the conductor fixed to the fixing projection 55 of the holder 50 so that the circuit board 33 of the rotor transformer 31 and the circuit board 37 of the video head 35 are connected in a corresponding relationship. A video head connecting device of a head drum assembly, comprising: (60). The method of claim 1, wherein the connector 60 is formed so that the first elastic piece 61 and the second elastic piece 62 capable of elastic deformation are connected by the connecting piece 63, the connecting piece 63 is the inner side And a fixing space 64 into which the fixing protrusion 55 of the holder 50 is inserted and fixed, and the first and second elastic pieces 61 and 62 have free rotors 61a and 62a at the rotor transformer. Connection heads 61b and 62b are formed to be connected to the circuit board 33 of 31 and the circuit board 37 of the video head 35, respectively. Device.