KR0160667B1 - Vcr with head cleaning function - Google Patents

Abstract

Disclosed is a VCR having a head cleaning function for removing foreign substances generated in a magnetic head. If foreign matter is attached to the magnetic head, the foreign material can be removed during loading and unloading or during loading and unloading, and to provide a VCR with improved head cleaning function that can remove foreign substances more powerfully. A brush for removing foreign substances attached to the head, a sensor installed in the brush to detect foreign substances in the magnetic head, and installed in the base frame means for moving the brush based on the signal detected by the sensor.

Description

V-Cal with Head Cleaning Function

1 is a perspective view showing a main part of a VCR having a conventional head cleaning function.

2 is a view showing main parts of a VCR having a cleaning function according to the present invention;

* Explanation of symbols for main parts of the drawings

20: base frame 30: head drum

31: lower head drum 32: upper head drum

33: magnetic head 40: cleaning means

41: sensor 42: spring

43: solenoid 44: solenoid shaft

50: brush 51: brush stand

52: Besssimo

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape image reproducing apparatus, and more particularly to a VCR having a head cleaning function for removing foreign substances generated between a tape and a head.

A head drum is installed in a video that plays back and records an image using a video tape. The head drum is divided into a rotating upper head drum and a lower head drum fixed thereto. The upper head drum is provided with a magnetic head and rotates together.

The magnetic head mounted on the upper drum records video and audio signals on the video tape conveyed while surrounding the upper head drum and the lower head drum, or reads the contents recorded on the tape. In this process, foreign matter is generated by friction between the magnetic head and the tape, or foreign matter is generated by friction between the drum and the tape. These foreign matters are attached to the magnetic head and cause many problems when recording or playing back.

In order to solve this problem, as shown in FIG. 1, a head cleaner (not shown) is driven by a mechanism of a deck mechanism (not shown) for loading and unloading a tape (not shown) onto the head drum. 1) is designed to reciprocate in the a direction and the opposite direction. The roller 13 is rotatably assembled to the pushed pin 12 of the lever 11 of the head cleaner 1. This roller 13 is in contact with the magnetic head serves to remove foreign matter.

The roller 13 is in contact with the head drum 15 because the lever 11 is moved in the a direction by the deck mechanism (not shown) when the tape is loaded. Therefore, as the upper head drum 16 rotates, foreign matter attached to the magnetic head 19 is removed. And when the tape is completely loaded into the head drum, the lever 11 is moved back in the opposite direction of a by the mechanism not shown. In this state, the VCR performs predetermined recording and reproducing operations.

When the tape is unloaded by the deck mechanism, the lever 11 is moved in the a direction by the deck mechanism so that the roller 13 is in close contact with the head drum 15 once again. The foreign matter attached to the head 19 is removed and moved to the original position by moving in the opposite direction of a when the tape is completely unloaded.

As described above, when the foreign matter is attached or not attached to the magnetic head 19, or when the tape is loaded and unloaded, the roller 13 is in close contact with the drum to remove the foreign matter of the magnetic head 19 is made. lost.

However, there is a problem when the tape is loaded for long time recording and reproducing. That is, when foreign matter is generated and attached to the magnetic head 19 during recording and playback, the video and audio signals are not recorded at all or the video is not reproduced well. In addition, the foreign matter of the roller 13 lacked the ability to remove the foreign matter did not see a satisfactory effect.

Therefore, an object of the present invention is to remove the foreign matter in the state of loading and unloading or the loading and unloading state when foreign matter is attached to the magnetic head, the head cleaning function to remove the foreign matter more powerfully is improved To provide a VCR.

In order to achieve the above object, a VCR having an improved head cleaning function includes a head drum fixed to a base frame to wind and rotate a magnetic tape, and installed on the head drum to record and reproduce information on the magnetic tape. A V-Cal with an improved magnetic head cleaning function having a magnetic head, comprising: a brush for removing the foreign matter attached to the magnetic head, a sensor installed in the brush to detect the foreign material of the magnetic head, and the base frame. And a means for moving the brush based on the signal detected by the sensor.

The means is characterized by having a solenoid with an axis moving based on the signal sensed by the sensor and a spring providing elasticity to return the axis to its original position.

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

2 is a perspective view showing the main part of the VCR with improved head cleaning function according to the present invention.

VCR improved head cleaning function according to the present invention is largely divided into the head drum 30 and the cleaning means 40 installed on the base frame 20.

As shown, the head drum 30 is wound around the base frame 20 to rotate and rotate a magnetic tape (not shown). The head drum 30 is divided into a lower head drum 31 fixed to the base frame 20 and an upper head drum 32 installed and rotating on the lower head drum 31. The upper head drum 32 is provided with a magnetic head 33 for recording video and audio signals on a magnetic tape.

The cleaning means 40 includes a sensor for detecting a foreign matter in the magnetic head 33, a brush 50 for removing the foreign matter, a solenoid 43 for moving the brush 50, and a spring for returning the solenoid. It consists of 42.

The brush 50 is divided into a brush stand 51 and a brush brim 52, and a brush brim 52 for directly removing the foreign matter by directly contacting the magnetic head 33 is installed on the brush strip 51. In order to use a suitable brush according to the degree of foreign substances generated in the magnetic head 33, a weak brush strong brush and a short brush long brush are made in a multi-stage combination. In addition, a sensor 41 is installed at the brush stage 51 to detect the presence or absence of foreign matter on the magnetic head 33.

A solenoid 43 is installed at one side of the brush stand 51, and the solenoid 43 is multistage such that the multi-stage brush head 51 can reach the magnetic head 33 according to a predetermined state. It has a solenoid shaft 44 that extends. The spring 42 serves to return the shaft 44 of the elongated solenoid 43 to its original position.

The operation of the VCR with improved magnetic head cleaning function according to the present invention configured as described above will be described in detail. When the tape 41 is loaded or not or in any case, that is, in any state in which the upper head drum is rotated, when the sensor 41 installed in the brush holder 51 detects a foreign matter in the magnetic head 33, the solenoid 43 is operated. The brush stage 51 advances. Therefore, the brush bristles 52 are in contact with the magnetic heads to remove foreign substances from the magnetic heads 33. In this state, the sensor 41 continuously detects the presence or absence of foreign matter in the magnetic head. If there is no foreign matter, the solenoid shaft is retracted to retreat the brush stand 51, and if the foreign matter is detected, the solenoid 43 The solenoid shaft 44 was advanced one more step so that the stronger hair of the brush bristles 52, which were in the multi-stage, contacted the magnetic head to remove foreign substances.

Therefore, V-Cal improved magnetic head cleaning function according to the present invention can remove foreign matters during loading and unloading or when loading and unloading when foreign matters are attached to magnetic heads, and remove foreign substances more powerfully. You can always record and play back video and audio information on tape.

Claims (3)

In a V-CAL having an improved magnetic head cleaning function having a head drum fixed to a base frame to wind and rotate magnetic tape and a magnetic head mounted on the head drum to record and reproduce information on the magnetic tape, A brush for removing foreign matter attached to the head, a sensor installed in the brush to detect the foreign material of the magnetic head, and installed in the base frame before and after the brush forward and backward based on the signal detected by the sensor V-Cal with an improved head cleaning function, characterized in that it is provided with a vacuum means. The head according to claim 1, wherein the forward and backward means includes a solenoid provided with a shaft moving forward and backward based on a signal sensed by the sensor, and a spring providing elasticity to return the shaft to its original position. VRT with improved cleaning. The head of claim 1, wherein the brush is made of a multi-stage with a strong and long brush in a soft and short bristle from the end of the brush.