CN1011094B - Rotational magnetic head device - Google Patents
Rotational magnetic head deviceInfo
- Publication number
- CN1011094B CN1011094B CN 88101322 CN88101322A CN1011094B CN 1011094 B CN1011094 B CN 1011094B CN 88101322 CN88101322 CN 88101322 CN 88101322 A CN88101322 A CN 88101322A CN 1011094 B CN1011094 B CN 1011094B
- Authority
- CN
- China
- Prior art keywords
- drum
- fixed
- lower drum
- assembly parts
- magnetic
- 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.)
- Expired
Links
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
The invention relates to a rotation magnetic head device, the lower drum provided with a magnetic tape guide path on the outside of circumference is screwed by screw components and fixed on the drum components fixed on a base plate, the upper drum provided with a magnetic head is arranged on the same axis with the lower drum. The utility model is characterized in that the lower drum is faced with the drum components and the lower drum and the drum components are combined and fixed together near the center.
Description
The present invention relates to a kind of rotary head device that is used for improving assembling precision.
VTR(video tape recorder in the past, that is video recorder) rotary head device, shown in the 2nd figure, its formation is to utilize a plurality of screw components 5 the circumference outside to be had the lower drum 4 of tape guidance groove 3, tighten to be fixed on and be fixed on the The One On The Chassis magnetic drum assembly parts 2, the upper drum 7 that magnetic head 6 is housed is configured on the above-mentioned lower drum 4 with coaxial manner.
In addition, motor 8 is housed below magnetic drum assembly parts 2, it is outstanding to its top then to make the turning axle 9 of this motor 8 run through the center of lower drum 4, and above-mentioned upper drum 7 is fixed on this turning axle 9 upper ends.In addition, in upper drum 7 and lower drum 4, be equipped with rotary transformer 11, its rotation lateral coil 12 and fixation side coil 13 are mounted to relative up and down mode.
Utilize a plurality of screw components 15 that the stator 14 of said motor 8 is tightened near the center that is fixed on lower drum 4.
Yet above-mentioned lower drum 4 utilizes a plurality of screw components 5 to tighten in the position of its circumference outside and is fixed on the magnetic drum assembly parts 2.
But in a manner described in Zhuan Pei the prior art rotary head device, because lower drum 4 and magnetic drum assembly parts 2 face one another and near the position its circumference outside be tightened fixing, so circumferential location is connected on the lower drum fitting surface of magnetic drum assembly parts 2 outside the lower drum 4.Therefore, when the precisive plane degree of lower drum fitting surface is bad, will therefore the excircle position of lower drum 4 be deformed, thereby assembling precision is descended, the distortion of the tape guidance groove 3 that causes thus can produce the problem of tape walking failure.
The present invention is a purpose to address the above problem, a kind of rotary head device is provided, its formation is to utilize screw component, the lower drum that the circumference outside is had the tape guidance groove is fixed on the magnetic drum assembly parts that are fixed on the chassis, the upper drum that magnetic head is housed is configured on the above-mentioned lower drum with coaxial manner, be characterized in making above-mentioned lower drum relative, near the center, connect and be fixed together, thereby can improve assembling precision with above-mentioned magnetic drum assembly parts.
Effect of the present invention is to make lower drum relative with the magnetic drum assembly parts, and is combined fixing near the heart position therein.Therefore, the precisive plane degree of the lower drum fitting surface of magnetic drum assembly parts can not influence the tape guidance groove.
Narrate the longitudinal sectional drawing that the present invention: Fig. 1 represents the rotary head device of one embodiment of the invention below in conjunction with accompanying drawing, Fig. 2 represents the longitudinal sectional drawing of prior art embodiment.
Fig. 1 represents one embodiment of the present of invention.Utilize a plurality of screw components 23 that magnetic drum assembly parts 22 are fixed on the chassis 21.
On above-mentioned magnetic drum assembly parts 22, be fixed with lower drum 25, the circumference outside of lower drum 25 has tape guidance groove 24, and below magnetic drum assembly parts 22, be fixed with the stator 27 of motor 26, and lower drum 25 and stator 27 are near the center of lower drum 25, by many of shared screw component 28() combine with magnetic drum assembly parts 22.
Dispose upper drum 30 on the lower drum 25, magnetic head 29 is equipped with in the following close circumference outside of upper drum 30.
Be fixed on turning axle 32 on the rotor 31 of said motor 26 and run through the centre of above-mentioned lower drum 25, above-mentioned upper drum 30 is fixed on this turning axle 32 upper ends, thereby can be with rotor 31 rotations.
Be equipped with in the centre of above-mentioned lower drum 25 and be used for the ball bearing 33 of supporting rotating shaft 32, in upper drum 30 and lower drum 25, revolving coil 35 and fixed coil 36 are housed relatively up and down, they constitute rotary transformer 34.
During according to above-mentioned make, because lower drum 25 is fixed on the magnetic drum assembly parts 22 near the heart position therein, when so even the precisive plane degree of magnetic drum fitting surface is bad under the magnetic drum assembly parts 22, also can not have influence on the circumference outside of lower drum 25, therefore tape guidance groove 24 can not deform because of the combination assembling of screw component 28, thereby has improved assembling precision.
In addition, especially in the mode of the foregoing description because can combine jointly by the stator 27 and the lower drum 25 of shared screw component 28 with motor 26, thereby so economization screw component structure is simplified, be easy to assemble.
The present invention has more than and is limited to the foregoing description.For example lower drum 25 also can be fixed on the magnetic drum assembly parts 22 with different screw components respectively with stator 27, also can make lower drum 25 be fixed on place than stator 27 more close centers.
Because the present invention is fixed together lower drum and magnetic drum assembly parts vis-a-vis therein near the heart position, so, also can not make the circumference outer portion distortion of lower drum when even the precisive plane degree of the lower drum fitting surface of magnetic drum assembly parts is bad.Therefore, when being fixed on the lower drum combination on the magnetic drum assembly parts, the tape guidance groove that is arranged on the circumference outside of lower drum can not deform, thereby has improved assembling precision, guarantees good tape walking performance.
Claims (1)
1, a kind of rotary head device, the motor driven that constitutes by stator and rotor, stator is fixed on the bottom of magnetic drum assembly parts, and be bearing in the rotating shaft by means of the lower drum axle, rotating shaft is fixed on the coaxial installation of lower drum and is equipped with on the upper drum of magnetic head, by screw the lower drum that the outside has tape guidance groove 24 is fixed on the magnetic drum assembly parts that are fixed on the chassis, it is characterized in that: by shared screw above-mentioned lower drum and stator are connect the part of described lower drum outside the mounting part of itself and above-mentioned magnetic drum assembly parts that be fixed together near the heart position therein facing to the magnetic drum assembly parts mutually and leave certain distance with it.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40.400/87 | 1987-03-19 | ||
| JP1987040400U JPH0433573Y2 (en) | 1987-03-19 | 1987-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88101322A CN88101322A (en) | 1988-10-05 |
| CN1011094B true CN1011094B (en) | 1991-01-02 |
Family
ID=12579609
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88101322 Expired CN1011094B (en) | 1987-03-19 | 1988-03-15 | Rotational magnetic head device |
| CN 88201647 Expired - Lifetime CN2053779U (en) | 1987-03-19 | 1988-03-15 | Rotary magnetic head apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88201647 Expired - Lifetime CN2053779U (en) | 1987-03-19 | 1988-03-15 | Rotary magnetic head apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0433573Y2 (en) |
| CN (2) | CN1011094B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2569388Y2 (en) * | 1992-06-24 | 1998-04-22 | アルプス電気株式会社 | Rotating head device |
| GB2272988B (en) * | 1992-10-30 | 1996-08-07 | Samsung Electro Mech | Drum of a tape recorder and an assembling method therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6040991Y2 (en) * | 1979-01-11 | 1985-12-12 | ソニー株式会社 | Rotating head drum mounting device |
-
1987
- 1987-03-19 JP JP1987040400U patent/JPH0433573Y2/ja not_active Expired
-
1988
- 1988-03-15 CN CN 88101322 patent/CN1011094B/en not_active Expired
- 1988-03-15 CN CN 88201647 patent/CN2053779U/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0433573Y2 (en) | 1992-08-11 |
| JPS63149433U (en) | 1988-10-03 |
| CN88101322A (en) | 1988-10-05 |
| CN2053779U (en) | 1990-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |