CN1078372C - Head drum assembly of tape recorder - Google Patents
Head drum assembly of tape recorder Download PDFInfo
- Publication number
- CN1078372C CN1078372C CN97109793A CN97109793A CN1078372C CN 1078372 C CN1078372 C CN 1078372C CN 97109793 A CN97109793 A CN 97109793A CN 97109793 A CN97109793 A CN 97109793A CN 1078372 C CN1078372 C CN 1078372C
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- China
- Prior art keywords
- drum
- video
- tape recorder
- lower drum
- head drum
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- 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 - Lifetime
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- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
The present invention provides a head drum assembly of tape recorder, including a head drum, a drum base and a brake, the head drum has a lower head drum and an upper head drum rotationally connected with the lower head drum, the drum base connects with a main board and supports the head drum aslant relative to the main board, the brake is used for brake of guide shaft base, the guide shaft base is used for installing tape onto the head drum, wherein the lower head drum is molded. Thus the number of elements is reduced and processing and assembling art are simplified.
Description
The present invention relates to the video head assembly of video tape recorder, more particularly, relate to video head assembly with molded lower drum.
As shown in Figure 1, general video tape recorder comprises: be installed in a pair of take-up reel 2 and 3 on the mainboard 1, the rolling wheel of video cassette (not shown) is contained on this take-up reel; Head drum 6 is installed on the drum seat 7; A pair of guide pillar base 4 and 5 is used for making the tape of video cassette to hold the circumferential surface of head drum 6.In addition, a pair of detent 8 is installed in the both sides of head drum 6, is used for the braking of guide pillar base 4 and 5.
As shown in Figure 2 pass through with advance in tape contact read or the head drum 6 of recorded information in, the rotatable upper drum 6a of magnetic head 11 and the lower drum 6b with tape guidance groove 21 and 12 coaxial connections of axle are housed.Have the outlet opening 22 that is used to extract out flexible cord 26 on the lower drum 6b, electric signal then provides by this flexible cord 26.
As shown in Figure 3, lower drum 6b is fixed on the drum seat 7 by a plurality of screws 9, and drum seat 7 is fixed on the mainboard shown in Figure 11.Upper drum 6a rotates on lower drum 6b, and in addition, a pair of detent 8 is installed in the both sides of drum seat 7.Yet in above-mentioned traditional video head assembly, upper drum 6a and lower drum 6b are formed by cut, and by cutting, head drum obtains high-precision size and shape and the good artistic face of roughness, yet this technology is difficult and expensive.In addition, its shape also is confined to cylindric cydariform.Because head drum 6, detent 8 and drum seat 7 are assemblings again after the separate machined, so the number of element increases, and the processing of element or packaging technology are also complicated.
Therefore, the purpose of this invention is to provide a kind of video head assembly of video tape recorder of architecture advances, with number and simplification processing and the packaging technology that reduces element.
For realizing above-mentioned purpose of the present invention, a kind of video head assembly of video tape recorder now is provided, this assembly is made of following several parts: comprise lower drum and the head drum of the upper drum that is rotatably connected with lower drum, be connected in mainboard and support the drum seat of head drum with respect to mainboard obliquely, and the detent that is used for the braking of guide pillar base, this guide pillar base is used for tape is installed to head drum, and wherein lower drum is formed by mould process.
Preferably: lower drum, drum seat and detent are shaped as a whole.
Preferred also have: lower drum is not saved with the part of contact with tape in the video tape recorder course of work.
Further preferably: be provided with the fan-shaped extension of radially not stretching with the contacted part edge of tape from lower drum, the both sides of detent and this extension form one.
By reference accompanying drawing detailed description of the preferred embodiment, above-mentioned purpose of the present invention and advantage will be more clear, in the accompanying drawing:
Fig. 1 is the skeleton view of traditional video tape recorder;
Fig. 2 is the decomposition diagram of traditional head drum;
Fig. 3 is the decomposition diagram of traditional video head assembly;
Fig. 4 is the skeleton view according to the video tape recorder video head assembly of first embodiment of the invention;
Fig. 5 is the skeleton view according to the video tape recorder video head assembly of second embodiment of the invention;
Fig. 6 is the skeleton view according to the video tape recorder video head assembly of third embodiment of the invention;
Fig. 7 is the planimetric map according to the video tape recorder video head assembly of fourth embodiment of the invention;
Fig. 8 is the skeleton view according to the video tape recorder video head assembly of fifth embodiment of the invention.
With reference to Fig. 4, comprise the lower drum 46b that mould process becomes and have magnetic head 47, and the upper drum 46a that be rotatably connected coaxial with lower drum 46b according to the video head assembly of first embodiment of the invention.Because lower drum 46b is therefore simple than the technology of cut by mould process, and the change in every way of the shape of lower drum 46b.
At this, preferably: the outside surface of the lower drum 46b that mould process becomes scribbles a kind of lubricant, and for example fluoro oxyhydroxide (fluorohydroxide) (F.OH) is advanced so that tape is smooth thereon.Therefore, the roughness of the circumferential surface of the molded lower drum 46b that forms is enhanced the degree close with cut.
According to second embodiment shown in Figure 5, the part of the molded lower drum 56b that forms (that is: lower drum 56b not with advance in the contacted part of tape) saved.This can realize by its shape of control in molding process at an easy rate.Different with the upper drum 56a of rotation, only some contacts with tape on being fixed on mainboard 1 (see figure 1) among the lower drum 56b.Therefore, can save among the lower drum 56b not the part with contact with tape, this does not influence the function of lower drum 56b.
In the 3rd embodiment shown in Figure 6, the drum seat 67 that is used for supporting obliquely with respect to mainboard 1 (see figure 1) lower drum 66b is molded as an integral body with lower drum 66b.Different with the upper drum 66a that rotates in tape (not shown) traveling process, lower drum 66b is fixed on mainboard 1 (see figure 1), thereby drum seat 67 can be shaped as an integral body with lower drum 66b.
In addition, a pair of detent 68 that is used to brake guide pillar base 4 and 5 (see figure 1)s is installed in the both sides of drum seat 67, and detent 68 can be by molded drum seat 67 part of the whole that become.
In other words, molten metal is injected a mould, the shape of this mould makes lower drum 66b, drum seat 67 and detent 68 monolithic moldings, and then cooling, can easily produce the video head assembly with said structure.
With reference to Fig. 7, lower drum 76b is molded as an integral body with drum seat 77.At this, the part of lower drum 76b (that is: the part that does not contact with the tape (not shown) in the video tape recorder course of work) 76b ' is saved.Above-mentioned form can easily shape by the shape of control mould.
Be installed in the detent 78 of drum seat 77 both sides, can become the part of drum seat 77 integral body as described above.
With reference to Fig. 8, the fan-shaped extension 86c from the part edge of lower drum 86b radially stretches is molded as an integral body with lower drum 86b.The circumferential section that forms the lower drum 86b of extension 86c does not contact with the tape (not shown) in the video tape recorder course of work.Detent 88 constitutes an integral body with the both sides of extension 86c.
According to the present invention, in the video head assembly of video tape recorder, lower drum and drum seat and/or integral body of the molded formation of detent, thus reduce the component number that needs assembling and saved the processing technology of difficulty (as cutting).
Claims (6)
1. the video head assembly of video tape recorder, this assembly is made up of head drum, drum seat and detent, the upper drum that this head drum comprises lower drum and is rotatably connected with described lower drum, this drum seat links to each other with mainboard and supports described head drum obliquely with respect to described mainboard, this detent is used for the braking of guide pillar base, this guide pillar base is used for tape is contained in described head drum
Wherein said lower drum is formed by mould process, and described lower drum and described drum seat are shaped as a whole.
2. the video head assembly of video tape recorder as claimed in claim 1 is characterized by: described drum seat is shaped as a whole with described detent.
3. the video head assembly of video tape recorder as claimed in claim 1 is characterized by: described lower drum is not saved with the part of described contact with tape in the described video tape recorder course of work.
4. the video head assembly of video tape recorder as claimed in claim 1, it is characterized by: be provided with the fan-shaped extension that does not go out with the part edge circumferentially extending of described contact with tape from described lower drum, and the both sides of described detent and described extension are shaped as a whole.
5. the video head assembly of video tape recorder as claimed in claim 1, it is characterized by: the circumferential surface by the molded described lower drum that forms scribbles lubricant.
6. the video head assembly of video tape recorder as claimed in claim 5, it is characterized by: described lubricant is fluoro oxyhydroxide (F.OH).
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR22071/96 | 1996-06-18 | ||
| KR22070/96 | 1996-06-18 | ||
| KR22071/1996 | 1996-06-18 | ||
| KR2019960016277U KR200145215Y1 (en) | 1996-06-18 | 1996-06-18 | Tape recorder |
| KR16277/96 | 1996-06-18 | ||
| KR22070/1996 | 1996-06-18 | ||
| KR16277/1996 | 1996-06-18 | ||
| KR2019960022071U KR200147105Y1 (en) | 1996-07-25 | 1996-07-25 | Precision measuring jig for the trunk lid for a car |
| KR2019960022070U KR200143855Y1 (en) | 1996-07-25 | 1996-07-25 | Measuring jig for the rear wind shield glass mounting groove for the car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1169006A CN1169006A (en) | 1997-12-31 |
| CN1078372C true CN1078372C (en) | 2002-01-23 |
Family
ID=27349329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97109793A Expired - Lifetime CN1078372C (en) | 1996-06-18 | 1997-04-28 | Head drum assembly of tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1078372C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100581512B1 (en) | 2002-01-18 | 2006-05-22 | 삼성전자주식회사 | moving deck plate of camcorder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06274802A (en) * | 1993-03-22 | 1994-09-30 | Sony Corp | Rotary magnetic head device |
-
1997
- 1997-04-28 CN CN97109793A patent/CN1078372C/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06274802A (en) * | 1993-03-22 | 1994-09-30 | Sony Corp | Rotary magnetic head device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1169006A (en) | 1997-12-31 |
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Legal Events
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |