KR20000032027A - Audio/control head assembly of tape recorder - Google Patents

Abstract

PURPOSE: An audio/control head assembly of a tape recorder is provided to improve a constructively and to reduce the production costs by constructing simple structure controlling the height, the tilt and the azimuth by locking of an adjust screw and eccentric rotational motion of a first and a second adjust cam. CONSTITUTION: An adjust screw(50) is locked on an upper surface of a deck(40) forming an odometer. A base plate(60) is movably installed at the adjust screw(50). A spring(70) is interposed between the deck(40) and the base plate(60) to bias the base plate(60). The first cam and the second cam(80,90) are installed on the upper surface of the deck(40) in a horizontal direction and in a vertical direction respectably to move the base plate(60) by eccentric rotational motion.

Description

Audio / Control Head Assembly on Tape Recorder

The present invention relates to a tape recorder, and more particularly, to an audio / control head assembly of a tape recorder which performs recording, reproduction, or erasing of an audio signal.

In general, a tape recorder such as a video cassette recorder (VCR) or a camcorder (recorder) or the like records or reproduces video and audio signals on a tape of a cassette traveling along a certain traveling path of a traveling system.

Looking at the traveling system of such a tape recorder, a head drum assembly for recording and reproducing video signals is installed on one side of the top surface of the deck, and an audio / control head assembly is installed on one side of the head drum assembly. The audio / control head assembly is equipped with an audio / control head, and the audio / control head has the concept of pulse on tape to perform recording, playback, or erasing of audio signals recorded on tape, or for servos in capstan motors. The regular control signal of the input or output, so that the input and output of the video and audio signals are matched with each other to be recorded or reproduced. The audio / control head assembly must then adjust the height, tilt and azimuth so that the tape travels in precise contact with the audio / control head.

In the audio / control head assembly of the conventional tape recorder, as shown in FIGS. 1A and 1B, the audio / control head assembly 20 is installed on one side of the deck 10, and the audio / control head assembly 20 is provided. The bracket 22 is installed to be able to rotate around the post 12 of the deck (10). In addition, a base plate 24 is installed on the upper portion of the bracket 22 to have a predetermined height by fastening the first, second, and third adjustment screws 26a, 26b, and 26c. The third adjustment screws 26a, 26b, 26c are arranged to form a substantially triangular shape. The first adjustment screw 26a is interposed with a compression coil spring 28, the tip of the second adjustment screw 26b is supported on the upper surface of the bracket 22, the audio / control on the upper end of the base plate 24 Head 30 is assembled.

Therefore, the audio / control head 30 is adjusted by adjusting the fastening amounts of the first, second and third adjustment screws 26a, 26b, 26c so that the height of the base plate 24 is adjusted with respect to the upper surface of the bracket 22. The height of the can be adjusted. And azimuth can be adjusted by fastening the 1st adjustment screw 26a by the 2nd adjustment screw 26b to a fixed point, and a tilt can be adjusted by engaging the 3rd adjustment screw 26c.

However, the conventional audio / control head assembly 20 uses the bracket 22, and the first, second and third adjusting screws 26a for adjusting the height and tilt of the audio / control head 20, azimuth, Since the number of parts is increased by using 26b and 26c, not only assembly is cumbersome and difficult, but also the assemblability is lowered, and the production cost of the product is increased due to the increase in the number of parts. For example, the first, second, and third adjustment screws 26a, 26b, and 26c are individually fastened to increase the assembly process, and it is difficult to accurately manage the fastening positions and the fastening amounts thereof. Have.

On the other hand, in parallel with the height of the audio / control head 20 made by the fastening of the first, second and third adjustment screws 26a, 26b, 26c, the second and third adjustments of the tilt and azimuth adjustment are also performed. Since the screws 26b and 26c are fastened, the adjustment work becomes cumbersome and difficult. In addition, since the fastening states of the first, second and third adjustment screws 26a 26b and 26c are easily changed by shock and vibration, it is difficult to keep the adjustment state stably.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is easy to assemble by a simple configuration to improve the assemblability, the production cost is reduced due to the reduction of the number of parts To provide an audio / control head assembly of a tape recorder.

Another object of the present invention is to provide an audio / control head assembly of a tape recorder so that the adjustment work is easy and the adjustment is improved.

It is still another object of the present invention to provide an audio / control head assembly of a tape recorder in which the adjustment state is kept stable and the reliability is improved.

1A and 1B are a plan view and a sectional view of a conventional audio / control head assembly,

2 is a perspective view of an audio / control head assembly according to the present invention;

3 is a plan view of an audio / control head assembly according to the present invention;

4 is a cross-sectional view of an audio / control head assembly according to the present invention;

Figure 5a is a cross-sectional view showing the adjustment of the tilt in the audio / control head assembly according to the present invention,

5B is a cross-sectional view illustrating an azimuth adjustment state in the audio / control head assembly according to the present invention.

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

40: deck 44: screw hole

50: adjusting screw 60: base plate

66 and 68: first and second support pieces 70: spring

72: pad 80, 90: first and second adjustment cam

100: audio / control head

A feature of the present invention for achieving the above object is in an audio / control head assembly of a tape recorder for recording and playing back and erasing audio signals or inputting or outputting control signals to a tape running along the deck's odometer, An adjusting screw fastened to an upper surface of the deck; A base plate installed to move freely on the adjustment screw; A spring interposed between the deck and the base plate to bias the base plate; An audio / control head assembly of a tape recorder comprising first and second adjustment cams respectively installed in the horizontal and vertical directions on an upper surface of the deck to move the base plate by an eccentric rotational movement.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an audio / control head assembly for a tape recorder according to the present invention will be described in detail with reference to the accompanying drawings.

2-5A and 5B are diagrams for explaining the audio / control head assembly for a tape recorder according to the present invention.

As shown in FIG. 2 and FIG. 4, the tape recorder is provided with the deck 40 which comprises a traveling system, and the boss 42 protrudes so that the boss 42 may have the screw hole 44 in the upper surface side of the deck 40. As shown in FIG. The boss 42 is preferably formed by burring the deck 40, and the screw hole 44 is preferably formed by tapping. The deck 40 has first and second shaft holes 46 and 48 formed in the horizontal and vertical directions with respect to the boss 42, respectively.

Then, the adjusting screw 50 is fastened to the screw hole 44 of the boss 42, and the adjusting screw 50 has a groove 54 fitted to a tool, for example, a screwdriver, on one side of the head 52. An extension 56 is formed at the other end of the head 52, and a screw 58 is formed at the distal end of the extension 56, which is fastened to the screw hole 44 of the boss 42.

As shown in FIG. 3 and FIG. 4, the base plate 60 is installed in the extension part 56 of the adjustment screw 50 so that it can move freely. The boss 62 is formed in the center of the base plate 60 to have the through hole 64, and the boss 62 is formed by the burring of the base plate 60. At this time, the diameter of the through-hole 64 is formed larger than the diameter of the extension 56, whereby the through-hole 64 of the boss 62 is inserted into the extension 56 of the adjustment screw 50, the base plate 60 is installed to move freely. The first support piece 64 is bent on the horizontal side surface of the base plate 60, the second support piece 66 is bent on the longitudinal side surface of the base plate 60, and the first and second supports are supported. The pieces 64 and 66 are preferably bent vertically with respect to the upper surface of the base plate 60.

On the other hand, a spring 70 for biasing the base plate 60 upward is interposed between the boss 42 of the deck 40 and the boss 62 of the base plate 60, and the spring 70 is a compression coil spring. Preference is given to using. An pad capable of elastic deformation is interposed between the head 52 of the adjusting screw 50 and the upper surface of the base plate 60, and the pad 72 is made of rubber or a flexible resin. .

As shown in FIGS. 4-5A and 5B, the first and second support pieces 64 and 66 of the base plate 60 are provided in the first and second shaft holes 46 and 48 of the deck 40. The first and second adjustment cams 80 and 90 are respectively provided so as to be supported and moved by an eccentric rotational motion. That is, each of the first and second adjustment cams 80, 90 is made of a resin material integrally molded to be rotatable in the first and second shaft holes 46, 48 of the deck 40, and thus the deck The molding of the resin material integrally with the 40 is called outsert molding. Each of the first and second adjustment cams 80, 90 has shaft portions 82, 92 that are rotated about the first and second shaft holes 46, 48, and at the top of the shaft portions 82, 92. Cylindrical eccentric portions 84 and 94 are formed to protrude upward of the deck 40, respectively. Grooves 86 and 96 are formed on the upper surfaces of the eccentric portions 84 and 94, respectively, to fit tools, for example, drivers, and the like, and lower ends of the shaft portions 82 and 92 are prevented from being separated. Flange portions 88 and 98 are formed, respectively. That is, the first and second adjustment cams 80 and 90 are formed such that the eccentric portions 84 and 94 have the maximum diameter and the minimum diameter with respect to the shaft portions 82 and 92. The audio / control head 100 is installed at the top end of the base plate 60.

The assembly and operation of the audio / control head assembly of the tape recorder according to the present invention as described above are as follows.

As shown in FIG. 4, in the state where the audio / control head 100 is installed at the tip of the base plate 60, the screw hole 44 of the deck 40 through the through hole 64 of the base plate 60. ), The screw 58 of the adjustment screw 50 is fastened. At this time, the spring 70 is interposed between the boss 42 of the deck 40 and the boss 62 of the base plate 60, and the top surface of the head 52 of the adjusting screw 50 and the base plate 60. The pad 72 is interposed between them.

As such, since the base plate 60 is formed on the upper surface of the deck 40 by the fastening of the adjustment screw 50, the assembly is easy and the assemblability is improved and the number of parts is reduced. Production costs are greatly reduced. In addition, by integrally molding the first and second adjustment cams 80 and 90 in the first and second shaft holes 46 and 48 of the deck 40, the assembly process and the production cost can be greatly reduced. .

On the other hand, the height of the base plate 60 is adjusted based on the upper surface of the deck 40 in accordance with the amount of fastening the screw 58 of the adjustment screw 50 to the screw hole 44 of the deck 40, so This makes it possible to easily adjust the height of the audio / control head 100. That is, when the fastening amount of the adjusting screw 50 is increased, the head 52 of the adjusting screw 50 lowers the base plate 60. On the contrary, when the fastening amount of the adjusting screw 50 is small, the base plate 60 is reduced. The height of the audio / control head 100 is adjusted while being biased upward by the elastic force of the spring 70.

As shown in FIG. 5A, when the tilt of the audio / control head 100 is to be adjusted, when the first adjustment cam 80 is rotated, the first adjustment cam 80 is eccentrically rotated and the base plate 60 is rotated. The first support piece (66) of the () or pushes away from the first support piece (66). That is, the first adjusting cam 80 pushes the first supporting piece 66 when the maximum diameter portion of the eccentric portion 84 contacts the first supporting piece 66, thereby causing the audio / control head ( 100) will tilt forward. And when the minimum diameter part of the eccentric part 84 contacts the 1st support piece 66, the 1st support piece 66 is biased toward the 1st adjustment cam 80 by the elastic force of the spring 70, As a result, the base plate 60 maintains a horizontal state with respect to the top surface of the deck 40.

By such an eccentric rotational motion of the first adjustment cam 80, the tilt of the audio / control head 100 can be easily adjusted. In addition, since the tilt of the audio / control head 100 can be finely adjusted according to the rotation amount of the first adjustment cam 80, the adjustment error is minimized and the controllability is remarkably improved.

As shown in FIG. 5B, when the azimuth of the audio / control head 100 is to be adjusted, when the second adjustment cam 90 is rotated, the second adjustment cam 80 is similar to the first adjustment cam 80 described above. 90 eccentric rotation to adjust the azimuth of the audio / control head 100. On the other hand, the pad 72 allows the base plate 60 to be tilted with elastic deformation corresponding to the tilt variation of the base plate 60 when adjusting the tilt and azimuth of the audio / control head 100. In addition, the pad 72 absorbs the transmission of vibration and shock, thereby stably maintaining the tilt and azimuth adjustment states.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and the scope of application of the present invention is not limited to these, and may be appropriately changed within the scope of the same idea. For example, the shape of each component specifically shown in the embodiment of the present invention can be modified.

As described above, according to the audio / control head assembly for a tape recorder according to the present invention, a simple structure capable of adjusting height, tilt, and azimuth by fastening the adjusting screw and the eccentric rotation of the first and second adjusting cams. Because it is made, assembling is easy to improve the assembly, as well as to reduce the production cost due to the reduction of the number of parts. In addition, the adjustment work is facilitated to improve the controllability, the adjustment state is kept stable and the reliability is improved.

Claims (3)

An audio / control head assembly of a tape recorder for recording and playing back audio signals and erasing audio signals or inputting or outputting control signals. An adjusting screw 50 fastened to the upper surface of the deck 40; A base plate (60) installed to move freely on the adjustment screw (50); A spring (70) interposed between the deck (40) and the base plate (60) to bias the base plate (60); Audio of a tape recorder comprising first and second adjustment cams 80 and 90 installed on the upper surface of the deck 40 in the horizontal and vertical directions to move the base plate 60 by an eccentric rotational motion. Control head assembly. The audio / control head assembly of a tape recorder according to claim 1, further comprising an elastically deformable pad (70) between the adjusting screw (50) and an upper surface of the base plate (60). The audio / control head assembly of claim 1, wherein each of the first and second adjustment cams (80, 90) is made of resin material integrally molded to the deck (40) to allow eccentric rotational movement.