JPH043382A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a tape stuck with dust as they are from proceeding to a recording and reproducing part by setting up a guide having a slit for sucking air and also having a blade with its tip facing into the slit after winding the tape around this guide. CONSTITUTION:The guide 11 possesses the slit 10 for sucking air to its surface of winding the tape 14. By connecting a negative pressure generating means 18, such as an air pump, etc., to an air suction room 17 of the guide 11 via a negative pressure supply pipe 16, a negative pressure is generated in the air suction room 17, and adherent substance on the surface of the tape 14 passing above the slit 10 is sucked to be removed from the tape 14. Moreover, with regard to such adherent substance which hardly comes off in flakes only by suction force, the tape 14 is pressed by the suction force against the blade 19, and the substance is scraped off from the surface of the tape by the blade 19.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention applies to a recording/reproducing apparatus in which a tape is guided and run by a guide.

BACKGROUND OF THE INVENTION As is well known in the art, in a recording and reproducing device such as a VTR in which a tape is guided and run by a guide, a drum, a head, etc. are used to record and reproduce signals on the tape from a container such as a tape cassette that stores the tape. The locations of the parts are quite far apart. Therefore, while the tape remains exposed in the atmosphere, it is guided by the fixed guide and the rotating guide, reaches the head section, records and reproduces signals, and is wound into the other storage section.

Problems to be Solved by the Invention However, in such a recording/reproducing apparatus, when the tape is exposed to the atmosphere, dirt, dust, etc. floating in the atmosphere adheres to the tape due to static electricity, etc. Since signals are recorded and reproduced with foreign matter still attached to the tape, so-called dropout occurs, in which signal dropouts occur.

%, and in recent high-density recording, even the adhesion of dust of several tens of micrometers causes signal loss for a long time, causing a big problem.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a recording and reproducing device that can prevent the tape from reaching the recording and reproducing section with foreign objects attached to the tape and can produce good recording and reproducing conditions. That is.

Means for Solving the Problems In order to solve the problems, the recording/reproducing device of the present invention has an air suction chamber inside and a slit communicating with the air suction chamber on the surface where the tape is wound. The air conditioner includes a guide having a blade with a tip facing inward, and negative pressure generating means connected to the guide so as to apply a negative pressure lower than atmospheric pressure to the air intake port.

Effect: With this configuration, foreign matter attached to the tape is guided by the tape or the guide, and while it is being wound around the tape, it is sucked by the negative pressure of the air suction chamber provided in the guide, and the friction force is generated by the plate whose tip faces the slit. As a result, the foreign matter is peeled off from the tape, and as a result, there is no longer any foreign matter attached to the guide-wrapping surface of the tape after passing through the guide. Therefore, recording and reproduction can be performed in good condition with less signal loss due to deposits.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

1 and 2 are a top view and a front view of a recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 3 is an A-A in FIG. 1.
Fig. 4 is a sectional view taken along the line B-B in Fig. 3, and shows a guide having a slit for air intake and a blade with its tip facing into the slit on the tape entry side of the drum. An example is shown below.

In FIGS. 1 to 4, reference numeral 11 indicates a guide having a slit 10 for air intake on the surface where the tape is wound, and 12
．． 13 is a tape guide for guiding tape running; 14 is a tape; 15 is a drum having a rotating head for recording and reproducing signals; a guide 11 having a slit 10 is connected to the tape guide 12 on the tape entry side of the drum 15; is also installed on the tape entry side. 16 is a negative pressure supply vibrator connected to the guide 11 so as to communicate with the slit 10 and an air suction chamber 17 provided inside the guide 11; the other end is connected to the negative pressure generating means 18; Negative pressure is supplied to the air suction chamber 17 of 11.

A blade 19 has its tip facing inside the slit 10, and is provided inside the air suction chamber 17 so as to protrude from the inner surface of the guide 11.

The id 11 has the slit 10 configured in this way.
The operation will be explained below. First, by connecting the negative pressure generating means 18 such as an air pump to the air suction chamber 17 of the guide 11 via the negative pressure supply pipe 16,
Negative pressure is generated in the air suction chamber 174C, and deposits on the surface of the tape 14 passing over the slit 10 are sucked and removed from the tape 14. Further, as for the deposits that are difficult to remove by suction force alone, the tape 14 is pressed against the blade 19 by the suction force, and the blade 19 scrapes off the adhered substances from the surface of the tape 14. Therefore, after the tape 14 passes through the guide 11 having the slit 10 for air suction and the blade with its tip facing into the slit 10, the surface of the tape 14 is free of deposits. Furthermore, the deposits scraped off by the blade 19 do not stay on the blade 19, but are carried away by the suction force of the air, and are prevented from being re-transferred onto the tape surface.

FIG. 5 is a perspective view showing a guide integrated with a fixed head according to another embodiment of the present invention, and FIG. 6 is a cross-sectional top view of FIG. 5. In FIGS. 5 and 6, reference numeral 21 denotes a guide that integrally has a fixed head portion 22 and a slot 7) Z3, which is connected to the air suction chamber 5.
The tip of the blade 24 provided in the guide faces a slit 23 formed in the front surface of the guide, which is the surface on which the tape is wound.

Effects of the Invention As described above, according to the present invention, a guide having a blade having a slit for air intake and a tip facing into the slit is installed by wrapping it around a tape.
Foreign matter attached to the tape is separated from the tape and sucked out by the negative pressure in the air suction chamber and the effect of the blade, leaving the tape free of foreign matter or adhesion, resulting in good recording and playback conditions with fewer signal dropouts. is obtained.

[Brief explanation of drawings]

1 and 2 are a top view and a front view of a case in which a guide having a slit for air intake is provided on the tape entry side of the drum according to an embodiment of the present invention, and FIG.
4 is a sectional view taken along line BB in FIG. 3, FIG. 5 is a perspective view of a guide with a fixed head and a slit, and FIG. FIG. 10...Slit, 11...Tape guide having slit, 12. 13...Tape guide, 14...
・Tape, 15...Drum, 16...Negative pressure supply pipe, I7...Air suction chamber, 18...Negative pressure generating means,
19...Blade, 21...Guide having a fixed head and slit, 22...Fixed head, 23...Slit, 24...Blade, 25...Air suction chamber. Agent Yoshihiro Morimoto No. S Figure 2 b1 Head Slit-Y. Illustration of the Kenshiki ν en-iri-kame-dai

Claims (1)

[Claims] 1. A guide having an air suction chamber inside and a slit communicating with the air suction chamber on the surface where the tape is wrapped, and a blade with its tip facing into the slit, and a large guide at the air suction port. and negative pressure generating means connected to the guide so as to provide a negative pressure lower than atmospheric pressure.