KR20000005395U - Cleaner of head drum assembly for tape recorder - Google Patents

Abstract

The present invention relates to a cleaner of a head drum assembly for a tape recorder. The cleaner of the conventional head drum assembly has limited cleaning only at the loading time of the pole base assembly, and the cleaning effect is reduced, and the contact state of the cleaning roller is continuously maintained, thereby causing damage due to wear.

The present invention has a cam gear rotatably installed on one side of the upper surface of the deck, the cam gear has a cam formed by continuous projections and grooves on the outer peripheral surface. A lever is rotatably installed between the head drum assembly and the cam gear, and a tappet is formed at one end of the lever in contact with and interlocked in a relationship corresponding to the cam of the cam gear, and an axis is formed at the other end of the lever. A cleaning roller is mounted on the shaft of the lever to wipe off foreign matter from the head drum assembly. Therefore, since the foreign matter of the head drum assembly is wiped by the repeated contact of the cleaning roller, the cleaning effect is improved, and the wear of the cleaning roller is prevented, thereby improving reliability such as extending the life.

Description

Cleaner of head drum assembly for tape recorder

The present invention relates to a head drum assembly for use in a tape recorder, and more particularly to a cleaner of a head drum assembly for a tape recorder for wiping off the foreign matter of the head drum assembly.

In general, a tape recorder such as a video cassette recorder or a camcorder records or reproduces video and audio signals on a tape of a cassette traveling along a certain running path of a traveling system by rotation of a head drum assembly.

In the traveling system of such a tape recorder, a pole base assembly for loading or unloading a tape of a cassette is respectively located on the supply and take-up side of the head drum assembly along the loading hole of the deck. The pawl base assembly receives the rotational force of the cam gear by the loading gear assembly and moves along the loading hole to load or unload the tape of the cassette. The pinch roller assembly is pressed onto the shaft of the capstan motor as the cam gear rotates. The tape will run. However, since the tape recorder is contaminated with foreign matters such as dust and magnetic material on the outer circumferential surface of the head drum assembly for recording or reproducing the tape, the tape recorder is separately provided to prevent damage to the tape and deterioration of the function of the head drum assembly due to contamination of the foreign matter. Crunner is used.

As shown in FIG. 1, the cleaner of the head drum assembly for a conventional tape recorder is provided with a head drum assembly 11 on an upper surface of the deck 10, and the head drum assembly 11 has an upper drum 12 and a lower. The drum 13 is constructed by assembling the upper and lower portions of the shaft 14. In the loading hole 15 of the deck 10, a pole base assembly 16 for loading or unloading a tape of a cassette (not shown) is located, and the pole base assembly 16 has a base 17. A post 18 is provided on one side of the upper surface of the deck 10 so as to be adjacent to an upper portion of the loading hole 15, and a stopper 19 is provided below the post 18.

Meanwhile, the cleaner 20 is installed to be adjacent to the loading hole 15 of the deck 10. The lever 21 of the cleaner 20 is freely rotatable about the post 18 of the deck 10. The tension plate 22 is extended to be supported by the stopper 19 of the deck 10 at one center of the lever 21 to enable elastic deformation, and at one end of the lever 21, a pole base assembly ( A pusher 23 is formed to selectively contact the base 17 of 16. A shaft 24 is mounted on the other end of the lever 21, and the shaft 24 of the lever 21 selectively contacts the outer circumferential surface of the head drum assembly 11 to clean foreign substances. ) Is rotatably mounted. Here, the cleaning roller 25 is made of relatively soft fibers or sponges.

Thus, when the base 17 pushes the pusher 23 of the lever 21 while the pawl base assembly 16 is transported along the loading hole 15 of the deck 10, the post 18 of the deck 10. The lever 21 is rotated around the cleaning roller 25 so that the cleaning roller 25 comes in contact with the outer circumferential surface of the head drum assembly 11 to wipe off the foreign matter. Then, when the base 17 of the pawl base assembly 16 exceeds the state in which the pusher 23 of the lever 21 is pushed, the tension plate 22 which is elastically deformed while being supported by the stopper 19 of the deck 10 is supported. ) Is restored to its original state so that the cleaning roller 25 is dropped from the outer circumferential surface of the head drum assembly 11.

However, the cleaner of the head drum assembly for a conventional tape recorder as described above has limited cleaning because the cleaning roller 25 is in contact with the outer circumferential surface of the head drum assembly 11 only at the time of loading the pole base assembly 16. You lose. That is, since the cleaning operation is not performed while the head drum assembly 11 and the cleaning roller 25 are dropped in the driving section other than the loading point of the tape, the cleaning time is very short and the cleaning effect is reduced.

In addition, since the cleaning roller 25 contacts the outer circumferential surface of the head drum assembly 11 by rotating the lever 21 of the cleaner 20 in a stopped state, the head drum assembly 11 and the cleaning roller 25 At the initial point of contact, the friction of the cleaning roller 25 is greatly applied to perform cleaning. However, after the initial time point, there was a problem that the cleaning effect was lowered while the frictional force of the cleaning roller 25 fell. That is, the cleaning roller 25 is rotated about the shaft 24 after the initial time point, and the friction force between the head drum assembly 11 and the cleaning roller 25 is dropped by the rotational movement of the cleaning roller 25. However, the cleaning effect decreases in proportion to the contact time. In addition, the cleaning effect decreases in proportion to the contact time, but since the head drum assembly 11 and the cleaning roller 25 are in constant contact with each other, damage caused by abrasion of the cleaning roller 25 occurs, resulting in a shortened life. It became. Therefore, there is a troublesome and inconvenient problem of frequently replacing the cleaning roller 25.

Meanwhile, a cleaner cassette tape is separately used to remove foreign substances from the head drum assembly 11. However, when a cleaner cassette tape is used, loads and loads are applied to the head drum assembly 11 and related components constituting the traveling system. There is a problem that the use is limited because of the wear occurs, there was a problem to purchase a separate cassette tape for the cleaner.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is to provide a cleaner of the head drum assembly for a tape recorder to improve the cleaning effect.

Another object of the present invention is to provide a cleaner of a head drum assembly for a tape recorder, in which damage caused by wear is prevented.

1 is a perspective view showing a cleaner of a head drum assembly for a conventional tape recorder;

2 is a perspective view showing a cleaner of the head drum assembly for a tape recorder according to the present invention;

3A and 3B are plan views showing an operating state of the cleaner of the head drum assembly for a tape recorder according to the present invention.

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

30: Deck 31: Head Drum Assembly

40: cam gear 41: cam

42: turning 43: home

60: cleaner 70: lever

74: tappet 76: axis

77: tension plate 80: cleaning roller

A feature of the present invention for achieving the above object is a tape recorder which records or reproduces video and audio signals by rotating a head drum assembly installed on an upper surface of a deck, so as to be rotatable on one side of an upper surface of the deck. A cam gear having a cam installed on the outer circumferential surface of the projections and the grooves; A lever rotatably installed between the head drum assembly and the cam gear, the tappet being in contact with and interlocked in a relationship corresponding to the cam of the cam gear, and having a shaft formed at the other end thereof; The cleaner of the head drum assembly for a tape recorder comprising a cleaning roller mounted to wipe the foreign matter of the head drum assembly on the shaft of the lever.

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

2 to 3A and 3B are views for explaining the cleaner of the head drum assembly for a tape recorder according to the present invention.

First, as shown in FIG. 2, a head drum assembly 31 for recording or reproducing video and audio signals is provided on a tape of a cassette (not shown) on the upper surface of the deck 30 in which the traveling system of the tape recorder is configured. The head drum assembly 31 is configured by the upper drum 32 and the lower drum 33 assembled to the upper and lower portions of the shaft 34, respectively.

On the other hand, the cam gear 40 is installed on one side of the upper surface of the deck 30, the cam gear 40 is rotated by the driving of a loading motor (not shown) rack bar (rack bar) for loading and unloading the cassette or In accordance with the change of mode, driving parts such as a connecting plate, a pinch roller assembly, and the like are operated. A cam 41 is formed on the outer circumferential surface of the cam gear 40, and the cam 41 is formed by successively connecting the arcuate protrusions 42 and the grooves 43. Here, the cam 41 has been shown to be formed on the outer peripheral surface of the cam gear 40, the cam 41 has a hole or groove shape in which projections and grooves continuously connected to the upper or lower surface of the cam gear 40 It may be formed.

2 and 3A, a post 50 is installed on the top surface of the deck 30 so as to be positioned between the head drum assembly 31 and the cam gear 40, and assembled at a position adjacent to the post 50. The hole 51 is formed. The cleaner 60 is rotatably installed in the post 50 of the deck 30. The cleaner 60 has a lever 70, and a boss 72 having a shaft hole 71 is formed in the center of the lever 70 so as to be inserted into the post 50 and rotatable. A first arm 73 is formed at one side of the boss 72, a tappet 74 is formed at the end of the first arm 73, and the tappet 74 is a cam 41 of the cam gear 40. Are interlocked in contact with each other. The second arm 75 is formed on the other side of the boss 72, and the shaft 76 is formed at the end of the second arm 75. A tension plate 77 is formed on the outer circumferential surface of the boss 72 to allow elastic deformation. An end of the tension plate 77 is fixed to the assembly hole 51 of the deck 30, and the tension plate 77 is The elastic deformation causes the lever 70 to return to the initial position.

On the other hand, the shaft 76 of the lever 70 is rotatably mounted to the cleaning roller 80 that can be selectively in contact with the outer peripheral surface of the head drum assembly 31 to wipe off foreign matter such as dust or magnetic materials, At the end of the 76, a snap ring 81 is engaged to prevent the cleaning roller 80 from detaching. Here, the cleaning roller 80 is preferably mounted to be in contact between the upper drum 32 and the lower drum 33, and the cleaning roller 80 is made of relatively soft fibers or sponges.

Referring to the operation of the cleaner of the head drum assembly for a tape recorder according to the present invention as described above are as follows.

As shown in FIGS. 3A and 3B, the tappet 74 in contact with the cam 41 is engaged by the rotation of the cam gear 40 when the loading or unloading of the tape is performed, thereby lever 70 is engaged. Is rotated about the post 50. That is, when the tappet 74 of the lever 70 is positioned at the apex of the protrusion 42, the cleaning roller 80 contacts the outer circumferential surface of the head drum assembly 31 by the rotation of the lever 70. Wipe off foreign substances such as dust, magnetic material, etc. At this time, the tension plate 77 of the lever 70 is maintained in an elastically deformed state.

Subsequently, when the cam gear 40 is rotated so that the tappet 74 is positioned in the groove 43, the tension plate 77, which has been elastically deformed, is restored to its original state, which causes the lever 70 to rotate to the initial position. Thus, the cleaning roller 80 is separated from the outer circumferential surface of the head drum assembly 31.

When the tape is loaded or unloaded as described above, the tappet 74 of the lever 70 is interlocked along the protrusion 42 and the groove 43 of the cam 41, and the cleaning roller 80 is connected to the head drum assembly ( 31) Repeated contact with the outer circumferential surface wipes off foreign substances. Here, during the cleaning operation, the frictional force of the cleaning roller 80 is largely applied at an initial time when the cleaning roller 80 contacts the outer circumferential surface of the head drum assembly 31 by the rotation of the lever 70. 80) contact is repeated to improve the cleaning effect.

In addition, since the abrasion due to the continuous contact of the head drum assembly 31 and the cleaning roller 80 is effectively prevented by the repeated contact of the cleaning roller 80, the life of the cleaning roller 80 is extended to improve reliability. do. On the other hand, the cam gear 40 is operated in addition to the loading or unloading of the tape, it is possible to improve the cleaning effect. For example, the rotational motion of the cam gear 40 is the greatest when the cassette is loaded. In this case, the cleaning roller 80 can wipe the foreign matter of the head drum assembly 31 several times.

In addition, the rotational movement of the cam gear 40 is reduced between the respective modes that are switched from the regeneration state to the stationary state so that the foreign matter of the head drum assembly 31 can be wiped off by the cleaning roller 80 little by little. Therefore, not only the tape damage due to the foreign matter of the head drum assembly 31 is prevented, but also the phenomenon that the running characteristic of the tape is prevented is reduced, thereby improving the image quality and sound quality clearly, and consequently the reliability of the product is significantly improved. do.

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

As described above, according to the cleaner of the head drum assembly for a tape recorder according to the present invention, since the foreign matter of the head drum assembly is wiped by repeated contact with the cleaning roller, the cleaning effect is not only improved, but the wear of the cleaning roller is improved. Is prevented and the lifespan is extended and reliability is improved.

Claims (2)

A tape recorder for recording or reproducing video and audio signals by rotating a head drum assembly provided on an upper surface of a deck, A cam gear (40) rotatably installed on one side of an upper surface of the deck (30) and having a cam (41) formed on the outer circumferential surface of the projections (42) and the grooves (43) continuously; A tappet 74 is rotatably installed between the head drum assembly 31 and the cam gear 40, and contacts and interlocks at one end in a relationship corresponding to the cam 40 of the cam gear 40. A lever 70 formed at the other end with a shaft 76; And a cleaning roller (80) mounted on the shaft (76) of the lever (70) to wipe off the foreign matter of the head drum assembly (31). The cleaner of claim 1, wherein the lever (80) is further provided with a tension plate (77) capable of returning the lever (70) to an initial position by elastic deformation.