JPS59201280A - Magnetic recording device - Google Patents

Abstract

PURPOSE:To prevent a magnetic tape from being rolled into a capstan, and also to remove dust, etc. adhering onto the magnetic tape by providing a rolling-in preventive wall formed as one body with a dust preventive part on a position for covering a part of the capstan. CONSTITUTION:A rolling-in preventive wall 14 is provided vertically on a position for covering a part of a downstream part of a capstan 3. A dust preventive part 19 is formed as one body with said wall, on the outside of this wall 14. According to this constitution, a tape 6 fed by the capstan 3 and a pinch roller 11 is prevented from being rolled into the capstan 3, and also dust adhering onto the tape 6 and a free magnetic powder, etc. are removed satisfactorily by the dust preventive part 19.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a magnetic recording device that reads and writes a large amount of information to and from an endless magnetic tape housed in a cassette case.

Technical background of the invention and its problems First, a conventional example is shown in FIG. (1) is the base of the magnetic recording device, and this base (1) includes a magnetic head 2) and a capstan (3) located downstream of the magnetic head 2).
) and the pinch roller (
4) is provided. The cassette tape (5) mounted on the base (1) is an endless magnetic tape (6)
One reel (7) wound with is placed in a cassette case (
8) is fixedly provided. A pullout opening (9) for pulling out the magnetic tape (6) is formed in a part of the inner circumference of the reel (force).In addition, the cassette case (8) has a reel (
Loop kite 00) is located on one side of the inner circumference of the force and bends the magnetic tape (6) that has passed through the capstan (3) into a U shape to loosen it, and the other side of the inner circumference of the reel (7). Position the magnetic tape (01) on the reel (from the inner periphery of the force and gradually move it upwards from the turn guide circle and from this turn kite (lυ) to the top of the magnetic tape (6) (c!J-le (7)). A shade-shaped turn guide (l''IJ) is provided along the outer periphery.

Further, an entrainment prevention plate 03) is attached to the base (1) with a gap S between it and the capstan (3).

Next, the effect will be explained. When the capstan (3) is driven, the magnetic tape (6) is pulled out from the outlet (9) to the front of the magnetic head (2), and after information is read or written, it is transferred to the reel (
7) is guided to the outermost circumference.

In order to run the endless magnetic tape (6) wound around the fixed reel (forcefully wound), the magnetic tape (6) is
) must be allowed to slip between each winding layer, and therefore the tension is low. However, if used for a long time, u′
The winding diameter of the magnetic tape (6) increases due to fine dust adhering to the tape (6) and magnetic powder being released from the surface.
Since the overall length of the magnetic tape (6) does not change, the tension tends to increase, resulting in poor running performance and resulting in read/write errors. Since this phenomenon cannot be ignored, the magnetic tape (6) that has passed through the capstan (3)
is guided through the loop guide 0Q and loosened in a U-shape to allow room for the winding diameter to increase. This slack will serve no purpose if the magnetic tape (6) is wound around the capstan (3), so a winding prevention plate (I31) is provided for this purpose.Capstan (3) and winding prevention plate The gap S with C131 is small at 0.2 mm, but if it touches the capstan 09, it will have a serious effect on the running speed, so adjustment is extremely difficult. There are many things that aren't there.

Further, if dust and loose magnetism attached to the magnetic tape (6) are left as they are, read/write errors will occur, so it is necessary to clean the magnetic tape. For this purpose, there are systems in which each cassette tape is equipped with a cleaning mechanism, but such systems complicate the structure of the cassette tape and increase the number of parts, making it uneconomical.

Purpose of the Invention The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to improve the running performance of the magnetic tape by preventing the magnetic tape from being wound around the capstan, and to further complicate the structure of the cassette tape. It is an object of the present invention to provide a magnetic recording device that can remove dust and loose magnetic powder adhering to a magnetic tape without any problem.

F2 Summary of the Invention This invention makes it easier for the magnetic tape to be wound around the capstan by creating slack in the magnetic tape when the cassette tape is mounted on the base. The wall reliably prevents the magnetic tape from getting entangled in the capstan, maintaining stable running performance over a long period of time.Furthermore, by providing a dust removal section on the entrapment prevention wall installed on the base, It is possible to remove dust attached to the magnetic tape and free magnetic powder while maintaining the structure of the cassette tape. Furthermore, by providing a dust storage box on the dust removal prevention wall as well as the dust removal section, it is possible to remove dust and free magnetic powder when necessary. It is possible to pick up dust and magnetic powder accumulated in the dust collection box, and furthermore, a dust storage recess is integrally formed with an entrapment prevention wall that is held by a holding member, so that dust and magnetic powder can be collected as needed. Accordingly, the entrainment prevention wall is removed from the holding member to pick up dust and magnetic powder adhering to the dust removal section or dust and magnetic powder accumulated in the dust storage recess.

Embodiment of the Invention A first embodiment of the invention will be described with reference to FIGS. 2 to 4. Components that are the same as those described in FIG. 1 are designated by the same reference numerals, and description thereof will be omitted. The same applies to the second embodiment and the following.

The base (+) covers the outer periphery of the capstan (3) from near the loop guide [0] and has a tip located near the downstream side of the point of contact between the capstan (3) and the pinch roller (4) to prevent entrapment. The wall - is fixed by screws (one stage). This entrapment prevention wall u/geko is formed with a recess (1ω) that opens outward, and a large number of metal flakes aη are formed so as to straddle these four parts (16). The dust removal part ([0] is attached to form the small hole side of the dust removal part ([0). Both sides of the metal thin piece housing θ are penetrated and bent from the surface of the entrainment prevention wall (L4).

In such a configuration, after the magnetic tape (6) has passed through the ifi capstan (3), it is maintained in a slack state in a 90-shape by the entrainment prevention wall I and the loop guide 00); Since the wall covers approximately half the circumference of the capstan (3), the magnetic tape (6) is not wound around the capstan (3). Therefore, the slack of the magnetic tape (6) is ensured, and good running performance can be maintained.

In addition, while the tape is running, the magnetic tape (6) comes into contact with the thin metal surface to remove dust and loose magnetic powder.
Write errors can be prevented. Only one dust removing section α wing is required on the magnetic recording device side, and there is no need to provide a dust removing section for each cassette tape (5), thus simplifying the structure of the cassette tape (5) and reducing costs. be able to.

Since the dust removal part is held using the dust removal prevention wall u4), there is no need to provide a separate mounting member, and the number of parts can be reduced.

Next, FIG. 5 shows a second embodiment of the present invention. In this embodiment, a dust storage recess is detachably attached to the lower part of the recess α6). That is, grooves Qυ are formed on both sides of the recess (16), and the dust storage box (20) Ic is formed with protrusions (two protrusions and a knob (c)) that engage between these grooves.

Therefore, dust and magnetic powder are removed from the magnetic tape (6) and stored in the dust storage box (20). Then, by removing the dust storage box (201) if necessary, dust inside the box can be collected.

FIG. 6 shows a third embodiment of the invention. That is, (24) is a holding member that is attached to the base (1) with screws 05), and this holding member Qa is formed with a vertically long protrusion (251). Four stripes (26) are formed on the minus side of the protrusion (2) and slidably engage with the protrusion (2), and a dust storage recess (2'O) with a bottom is integrally formed in the center.

Therefore, the dust removed by the dust removal section (1) is collected in the dust storage recess (27).When picking up dust, etc. in the pronation of the dust storage recess, it is removed from the holding member (24) from the entrainment prevention wall ( 14) Remove the entrapment prevention wall and holding member 0,
A) can be attached and detached with one touch without the need for tools.

Furthermore, the fourth embodiment of this invention will be explained based on FIG.
I will clarify. @The dust storage recess (example is integrally formed) with the bottom of the upper opening in the clogging prevention wall circle, and this stratified storage recess (2)
A dust removal section (30) is even formed by forming a plurality of slits 1 in communication with the slits.

Therefore, the dust and the like adhering to the magnetic tape (6) are crushed by the edge of the sulin (aD) and collected in the dust storage recess (28).

FIG. 8 shows a fifth embodiment of the invention. In this embodiment, a dust removal part 00 is formed on the entrapment prevention wall 04), and several dust storage boxes (2IJl) are detachably attached.The means for attaching the dust storage boxes 4 are the same as those of the second embodiment. The same is true.

FIG. 9 shows a sixth embodiment of the invention. That is, the entrainment prevention wall (14) held by the holding member C4)
) is provided with a dust removal section (30) and a four-part dust storage compartment.

Furthermore, a seventh embodiment of the present invention is shown in FIGS. 10 and 11.
This will be explained based on the diagram. A plurality of four parts (311) are formed on the outer peripheral surface of the entrapment prevention wall (14).The cleaning tape can be removed by adhering the cleaning tape to the bottom of these four parts (31) using double-sided adhesive tape C32. Limb (2)
is provided. The cleaning tape (c) is commercially available in a rolled form, and is made of a fibrous material such as Japanese paper that has a relatively high surface friction resistance.

Therefore, dust and the like attached to the magnetic tape (6) are captured by this cleaning tape (c).

Furthermore, embodiments of the present invention are shown in FIGS. 12 and 13.
This will be explained based on the diagram. Concave portion Gυ formed in the entrapment prevention wall circle
Attach brush 09 with double-sided adhesive tape (31J) to the bottom of
By this, a dust removal section 06) is formed.

Therefore, dust and the like adhering to the magnetic tape (6) are removed by this brush 05).

FIGS. 14 and 15 show a ninth embodiment of the present invention. That is, a dust storage recess is removably provided in the entrainment prevention wall (14j) equipped with a dust removal part (support).

Furthermore, what is shown in FIG. 16 and FIG. 17 shows a seventh embodiment of the present invention, in which an entrapment prevention wall (one with a decapitated head (36) 17q dust storage recess 07) is integrally formed.

Effects of the Invention Since the present invention is configured as described above, even if the magnetic tape is loose, the magnetic tape can be reliably prevented from being rolled into the capstan by the entire wrapping prevention wall, and thereby, it can be used for a long period of time. The running performance of the Niwatashi magnetic tape can be improved, and the dust and loose magnetic powder adhering to the magnetic tape can be removed by the dust removing section. In addition, by installing a dust storage box on the anti-entanglement wall, dust can be stored in this dust storage box and collected as needed, or the dust can be stored in four dust storage compartments. By removing the entrainment prevention wall having the above from the holding member, it is possible to discard the dust accumulated in the four dust storage parts as necessary.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a conventional example, Fig. 2 is a plan view showing a first embodiment of the present invention, Fig. 3 is a perspective view of the entrainment prevention wall, and Fig. 4 is a plan view of the entrainment prevention wall. FIG. 5 is a perspective view of the entrapment prevention wall showing the second embodiment of the present invention, and FIG.
FIG. 7 is a perspective view of an entrapment prevention wall showing a fourth embodiment of the invention, FIG. 8 is a perspective view of an entrapment prevention wall showing a fourth embodiment of the invention. FIG. 9 is a perspective view of an entrapment prevention wall showing a sixth embodiment of the present invention, and FIG. 10 shows a seventh embodiment of the invention. FIG. 11 is a horizontal cross-sectional view of the entrainment prevention wall, FIG. 12 is a perspective view of the entrainment prevention wall showing a second embodiment of the invention, and FIG. 13 is a perspective view of the entrainment prevention wall. FIG. 14 is a perspective view of the entrainment prevention wall showing a ninth embodiment of the invention, FIG. 15 is a longitudinal sectional side view of the entrapment prevention wall, and FIG. 16 is the embodiment of the invention. FIG. 17 is a perspective view of the entrainment prevention wall showing the seventh embodiment of the present invention, and FIG. 17 is a vertical side view of the entrainment prevention wall. 1 base, 2 magnetic head, 3 capsta>', 4
Pinch roller, 5 - Cassette tape, 6 Magnetic tape, 7 - Reel, 8 Cassette case, 9 - Outlet, 1
．． 1, 12 Turn guide, 14/Entanglement prevention wall, 1
7 metal thin piece, 18 small hole, 19/dust removal part, 20,
Dust storage box, 24, holding member, 27, 28, four dust storage parts, 29 slit, 30 dust removal section, 33 cleaning tape, 34...dust removal section, 35 brush,
36 Exclusion part, 37 Dust storage recess Applicant Tokyo Electric Co., Ltd. Division - Figure 1 - No. J5 IZ) Kari Z name" 5 Ho 5 Shield figure

Claims (1)

[Scope of Claims] 1. One reel on which an endless magnetic tape is wound and a pull-out opening for pulling out the innermost magnetic tape is formed on the inner periphery, and from the internal space of this reel to the outermost periphery of this reel. A cassette tape is provided in which a turn guide for guiding the magnetic tape is attached to a cassette case, and a capstan and a pinch roller protrude from the bottom of the cassette case when the cassette case is mounted on the base, and a pinch roller upstream of the capstan. a magnetic head located at the base, and an entrainment prevention wall is provided on the base to cover a part of the outer periphery of the capstan and separate the magnetic tape that has passed through the capstan from the capstan. A magnetic recording device characterized in that a dust removal section that contacts the magnetic tape is provided on the outer surface of the entrainment prevention wall. 2. The magnetic recording device according to claim 1, characterized in that the dust removal section is a thin metal piece with a large number of small holes formed therein. 3. The magnetic recording device according to claim 1, wherein the edge of the slit formed on the outer surface of the entrainment prevention wall is used as a dust removal section. 4. The magnetic recording device according to claim 1, characterized in that a cleaning tape is used as the dust removal section. 5. The magnetic recording device according to claim 1, characterized in that a brush is used as the dust removal section. 6. One reel on which an endless magnetic tape is wound and a pull-out opening for drawing out the innermost magnetic tape is formed on the inner periphery, and the magnetic tape is guided from the internal space of this reel to the outermost periphery of this reel. <A cassette tape with a turn guide attached to a cassette case, a capstan and a pinch roller protruding from the bottom of the cassette case when the cassette tape is mounted on a base, and a magnetic head located upstream of the capstan. is provided on the base, and an entrainment prevention wall is provided on the base to cover a part of the outer periphery of the capstan and separate the magnetic tape that has completely passed through the capstan from the capstan, and an outer surface of the entrainment prevention wall is provided on the base. A magnetic recording device characterized in that a dust removing section is provided in contact with the magnetic tape, and a dust storage box is provided below the dust removing section. 7. One reel on which an endless magnetic tape is wound and a pull-out opening for drawing out the innermost magnetic tape is formed on the inner periphery, and the magnetic tape is guided from the internal space of this reel to the outermost periphery of this reel. A cassette tape with a turn kite attached to a cassette case is provided, and a capstan and a pinch roller protrude from the ashes of the cassette case when the cassette tape is mounted on the base, and a pinch roller located upstream of the capstan. A magnetic head is provided on the base, and an entrainment prevention wall that covers a part of the outer periphery of the capstan and separates the magnetic tape that has passed through the capstan from the capstan is removably attached to the base by a holding member. What is claimed is: 1. A magnetic recording device, characterized in that said entrainment prevention wall is provided with a removing portion that contacts said magnetic tape, and a dust storage recessed portion located below said dust removal portion is integrally formed.