CN1140873A - Head drum for use in video cassette recorder - Google Patents
Head drum for use in video cassette recorder Download PDFInfo
- Publication number
- CN1140873A CN1140873A CN96102582A CN96102582A CN1140873A CN 1140873 A CN1140873 A CN 1140873A CN 96102582 A CN96102582 A CN 96102582A CN 96102582 A CN96102582 A CN 96102582A CN 1140873 A CN1140873 A CN 1140873A
- Authority
- CN
- China
- Prior art keywords
- tape
- drum
- guide rail
- magnetic
- video cassette
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/60—Guiding record carrier
- G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/60—Guiding record carrier
- G11B15/66—Threading; Loading; Automatic self-loading
- G11B15/665—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container
- G11B15/6653—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container to pull the record carrier against drum
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Heads (AREA)
Abstract
To prevent the deviation of a tape from a lead line at the time of the review mode of a VCR. The assembly of a head drum for a video cassette recorder contains a rotary drum, in which one or a plurality of heads are mounted on an underside, and a stopping drum, in which a lead line beginning to guide a tape within the range of at least 13 deg.-17 deg. in the travelling direction of the heads from a point, where the tape T starts a contact with the drum, is formed on an outer circumferential surface.
Description
The present invention relates to video cassette recorder (" VCR "), particularly heavyly can prevent that tape from departing from the magnetic drum of magnetic drum guide rail during looking into pattern at it.
As everyone knows, video cassette recorder generally includes a post board component, and it is installed in movingly and is used on the platen tape is drawn by tape cassete, and it is contacted with the magnetic drum of video cassette recorder.This post board component comprises that a guiding roller bearing is used to guide tape to move by magnetic tape path, is used to help tape to keep the suitable upright position of a relative magnetic drum with a tilt column.
Fig. 1 has represented the post board component of prior art, and at this moment, the tape T that has extracted out from the tape cassete (not shown) has been loaded on the drum module 10.The post board component is provided with a post plate 1, one a guiding roller bearing 2 and a tilt column 3, and the roller bearing 2 that wherein leads also further comprises a shaft-cup 2a, a pad 2b and a rotatable roller bearing 2c.Guiding roller bearing 2 moves along magnetic tape path at tape run duration guiding tape T with tilt column 3, and helps tape T to keep the suitable and upright position of a relative drum module 10.
Please referring to Fig. 2, here represented the xsect of drum module 10 among Fig. 1, it comprises a turning axle 11, one is divided into two-part is rotary head drum 13 and static magnetic drum 12, a flange 15, upper ball bearing 16 and lower ball bearing 16 ', 17, one stator transformers 18 of a rotor transformer and a pair of magnetic head 19.
In addition, this static magnetic drum 14 is provided with guide rail 14a at its periphery surface and is used to guide tape T.This guide rail 14a is designed to begin to guide tape in point " L " (see figure 9), this point be positioned at the magnetic head traffic direction apart from tape first with the magnetic drum 12 about 10 degree lonely degree places, contact that join.
When the information recording/copying/when taking out from tape T, tape T is in arrow A direction operation shown in Figure 3,14a moves along guide rail, and and the lid 2a of the roller bearing 2 that leads contact.At this moment, magnetic head 19 is at the scanning direction tape T shown in Fig. 3 arrow " B ".
On the other hand, T in the opposite direction moves when tape, promptly as when video cassette recorder is in heavily looks into the pattern situation, and when tape moved in direction shown in Fig. 4 arrow " C ", it was tending towards moving downward (see figure 5), thereby contacts with the pad 2b of guiding roller bearing 2.In this situation, the corresponding track part of magnetic head 19 is represented by Fig. 4 arrow " D ".
But, when tape T contacts with pad 2b, tape T just may become not, as shown in Figure 6A depart from guide rail 14a like that, or shown in Fig. 6 B like that, its base fold that becomes, thus stop the information that is recorded on the tape all not read by magnetic head 19, and this is just and then cause as shown in Figure 7 the no image area " E " that occurs a blank on TV monitor.
Therefore, fundamental purpose of the present invention is to propose a kind of head drum for use in video cassette recorder, and it can prevent that during video cassette recorder is reheard pattern tape from departing from its guide rail.
Therefore, one aspect of the present invention proposes a kind of video cassette recorder, it comprises one therein and is used to guide the drum module of tape along its motion path, this drum module comprises a rotary head drum that has one or more magnetic heads in its lower surface, be provided with the static magnetic drum of guide rail with one at its periphery surface, wherein this guide rail begins to guide tape with the magnetic drum contact that joins at the some places of the lonely degree scope of 13 to 17 degree at the magnetic head traffic direction first apart from tape.
Above-mentioned and other purpose of the present invention and characteristic will be in conjunction with the accompanying drawings, and it is more clear to become in the explanation by following most preferred embodiment, wherein:
Fig. 1 is post board component and common drum module;
Fig. 2 is the cross-sectional view of the common drum module of Fig. 1;
Fig. 3 is put the track part on the tape when resembling pattern;
Fig. 4 track part on the tape when looking into pattern of attaching most importance to;
Fig. 5 has described and has heavily looked into the operation of tape on the guiding roller bearing during the pattern;
Fig. 6 A and 6B show that correspondingly heavily looking into tape during the pattern departs from the become situation of fold of guide rail and base thereof;
Fig. 7 provides when tape departs from guide rail, puts the situation of elephant on the monitor;
Fig. 8 is post board component and the drum module that comprises institute's invention guide rail therein;
Fig. 9 has shown the comparable situation when existing guide rail and institute's invention guide rail are superimposed; And
Figure 10 explanation is heavily looked into during the pattern tape in the situation of institute's invention guide rail.
Please refer to Fig. 8, represented a post board component here and tape is pulled out magnetic drum 100 after the loading from the tape cassete (not shown).
As shown in the figure, this post board component is provided with a post plate 51, one guiding roller bearing 52 and tilt columns 53.This guiding roller bearing 52 guides tape T with this tilt column 53, and the suitable upright position that helps tape T to keep a relative drum module 100.This magnetic drum 100 is divided into rotary head drum 101 and static magnetic drum 102.Lower surface at this rotary head drum 101 is equipped with one or more magnetic head (not shown)s; Periphery surface at static magnetic drum 102 is provided with a guide rail of being invented 103.
This guide rail of inventing 103 is that with the different of existing guide rail 14a as shown in Figure 9, institute's invention guide rail begins to guide tape at point " M ", and existing guide rail 14a begins guiding at point " L ".Point " M " be positioned at the magnetic head traffic direction apart from tape first at the join lonely degree of 13 to the 17 degree place of contact of magnetic drum 100 left sides and magnetic drum.Point " M " preferably is positioned at the 15 degree places of magnetic head traffic direction apart from above-mentioned first contact point.
By guide rail being begun guide the point " M " of tape to be positioned over the magnetic head traffic direction apart between tape and magnetic drum, 13 to 17 degree radian places of first contact point, just may be as shown in figure 10, during heavily looking into pattern, eliminate tape depart from its guide rail or its base by fold may.
Though the relative most preferred embodiment of the present invention represents and illustrate that the experts of this technology are interpreted as this, only otherwise leave the determined scope of the present invention of following claim, various changes and modifications all are fine.
Claims (2)
1, a kind of video cassette recorder, it includes one and is used to guide the drum module of tape along its operating path, and wherein drum module comprises:
A rotary head drum that has one or more magnetic heads in its lower surface; With
One is provided with the static magnetic drum of a guide rail at its periphery surface, and wherein, this guide rail begins to guide tape with the magnetic drum contact that joins at the some places of 13 to 17 degree radian scopes at the magnetic head traffic direction first apart from tape.
2, the described video cassette recorder of claim 1, wherein, guide rail begins to guide tape at the magnetic head traffic direction apart from the some place of about 15 radians of first contact point between tape and magnetic drum.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR13830/95 | 1995-05-30 | ||
KR1019950013830A KR0153986B1 (en) | 1995-05-30 | 1995-05-30 | Head drum of a tape recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1140873A true CN1140873A (en) | 1997-01-22 |
Family
ID=19415849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN96102582A Pending CN1140873A (en) | 1995-05-30 | 1996-02-28 | Head drum for use in video cassette recorder |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPH08329571A (en) |
KR (1) | KR0153986B1 (en) |
CN (1) | CN1140873A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102667929A (en) * | 2009-12-21 | 2012-09-12 | 国际商业机器公司 | Method and apparatus for operating a storage device |
CN104321816A (en) * | 2012-07-10 | 2015-01-28 | 国际商业机器公司 | Determining a skew error signal (SES) offset used to determine an SES to adjust heads in a drive unit |
-
1995
- 1995-05-30 KR KR1019950013830A patent/KR0153986B1/en not_active IP Right Cessation
-
1996
- 1996-02-26 JP JP8037862A patent/JPH08329571A/en active Pending
- 1996-02-28 CN CN96102582A patent/CN1140873A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102667929A (en) * | 2009-12-21 | 2012-09-12 | 国际商业机器公司 | Method and apparatus for operating a storage device |
CN102667929B (en) * | 2009-12-21 | 2015-06-17 | 国际商业机器公司 | Method and apparatus for operating a storage device |
CN104321816A (en) * | 2012-07-10 | 2015-01-28 | 国际商业机器公司 | Determining a skew error signal (SES) offset used to determine an SES to adjust heads in a drive unit |
CN104321816B (en) * | 2012-07-10 | 2016-08-17 | 国际商业机器公司 | Control magnetic head in driver and access the method and system of data on recordable media |
Also Published As
Publication number | Publication date |
---|---|
KR0153986B1 (en) | 1998-12-15 |
JPH08329571A (en) | 1996-12-13 |
KR960042538A (en) | 1996-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C01 | Deemed withdrawal of patent application (patent law 1993) | ||
WD01 | Invention patent application deemed withdrawn after publication |