CN1062081C - Magnetic head unit - Google Patents
Magnetic head unit Download PDFInfo
- Publication number
- CN1062081C CN1062081C CN94101548A CN94101548A CN1062081C CN 1062081 C CN1062081 C CN 1062081C CN 94101548 A CN94101548 A CN 94101548A CN 94101548 A CN94101548 A CN 94101548A CN 1062081 C CN1062081 C CN 1062081C
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- China
- Prior art keywords
- substrate
- head
- magnetic head
- mounting plate
- magnetic
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- Expired - Fee Related
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- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
The invention provides a magnetic head unit which enables the exact and easy azimuth adjustment of the heads. An aperture 3 for head insertion is formed in the central part of a base plate 2 and a head 4 for recording and reproducing and a head 5 for erasing are respectively fixed to the inner side of the aperture 3 for head insertion of this base plate 2. The base plate 2 is mounted to a mounting jig 10 which is actuated to invert 180 deg. in the forward path and backward path of a magnetic recording medium and a positioning reference plane 13 for azimuth adjustment of the heads 4, 5 is formed on the base plate 2.
Description
The present invention relates to a kind of magnetic head unit, more particularly, relate to a kind of rotary-type magnetic head unit, this kind magnetic head unit is used for automatic wraparound type tape deck or similarly installs, and in this kind magnetic head unit, magnetic tape cassette advance and the stroke that returns between, magnetic head is rotated 180 degree.
Usually, the automatic wraparound of magnetic information is recorded and is reset and finish in audio casette deck or similar device.Recently, in this automatic wraparound type tape deck, rotary-type magnetic head unit is used, and in this kind magnetic head unit, magnetic head is rotated 180 degree in the stroke that advances and return of magnetic tape cassette so that the recording/reproducing condition is advanced to magnetic tape cassette and the stroke that returns is certain.
Fig. 5 to Fig. 7 has shown a kind of so traditional rotary-type magnetic head unit.Magnetic head unit 1 has a basic middle part that is formed on this substrate 2 for 2, one insertion mouths 3 of circular substrate.An one recording/reproducing head 4 and an erase head 5 are inserted in this insertion mouth 3.This recording/reproducing head 4 and erase head 5 are fixed on the substrate 2 by tackifier or similar thing when being maintained at the state of the head insertion mouth 3 that is inserted into substrate 2.
The a pair of tape guidance device 6 that is used to clamp each side of this recording/reproducing head 4 and erase head 5 is formed on the part of the relative both sides of this insertion mouth 3 of substrate 2 to protrude forward, and joint flange 7 is formed on the inside surface bight of end of this tape guidance device 6, and a side end of recording/reproducing head 4 and erase head 5 is resisted against respectively on this joint flange 7.Be used for guiding the magnetic recording media that do not show is formed on each tape guidance device 6 to the gathering sill 8 with respect to a precalculated position of magnetic head 4 and 5 a end face.
In addition, as shown in Figure 7, also be provided with a mounting plate 10 that is used for installation base plate 2.This mounting plate 10 can be by a driver element Rotate 180 degree that does not show.On this mounting plate 10, be formed with and be used for by locating the positioning convex portion 11 of substrate 2 with the detent engagement of the mounting hole 9 of substrate 2.The screw 12 that cooperates each mounting hole and open is formed on the central authorities of positioning convex portion 11.
In order to assemble traditional magnetic head of setting like this, this 4 and 5 at first is inserted in the insertion mouth of substrate 2, the joint flange 7 that makes a front edge of 4 and 5 and tape guidance device 6 against.At this state, carry out a position angle adjustment of 4 and 5.
Be necessary that correct 4 and 5 carry out the position angle adjustment so that make when substrate 2 is installed on the mounting plate 10 4 and 5 to be set at the position suitable with respect to their established angle, and the position of substrate 2 is by 11 decisions of positioning convex portion.Therefore, one central space being based in the mounting hole 9 of this substrate 2 of 4 and 5 position angle adjustment is carried out.Around mounting hole 9, be formed with locating slot corresponding to positioning convex portion 11.
The opposing party and, 4 and 5 are so positioned so that their magnetic gap portion is set at respect to the tape preposition, this tape is by 8 guidings of the gathering sill on the substrate 2,4 and 5 for example are fixed by this way, and promptly a side of this recording/reproducing head 4 head that is pressed against substrate by a mounting plate that does not show inserts on mouthfuls 3 the side.At this state, 4 and 5 are fixed on the substrate 2 by tackifier or analog.
Adjust at a position angle of having finished 4 and 5 by above-mentioned steps and behind fixing on the substrate 2, the locating slot of the mounting hole 9 of this substrate 2 is engaged in the positioning convex portion 11 of mounting plate 10 with location substrate 2, and the screw that does not show is threaded into the screw 12 of mounting plate 10 by mounting hole 9, so that substrate 2 is fixed on the mounting plate 10.
Above-mentioned magnetic head assembly Japan's number of patent application for put down into 28742, the China national patent No. is in No. 93105324.2 application documents detailed description to be arranged.
Yet in above-mentioned traditional magnetic head unit 1,4 and 5 position angle adjustment on substrate 2 are based on that one central space in the mounting hole 9 of substrate 2 carries out.Therefore, the benchmark of this adjustment location, position angle is quite uncertain, and this is present in the positioning reference in the space of mounting hole 9 to need imagination when adjusting.Its result, 4 and 5 position angle adjustment can not accurately be carried out, and therefore has the quite problem of difficulty of the low and position angle adjustment operation of position angle degree of accuracy.
At the China national number of patent application is also to have described a kind of magnetic head assembly in the CN1035574 number application, and it comprises the rectangle cylinder recess 17 that magnetic head base 11, magnetic head keep body 13 and hold magnetic head, and magnetic head keeps body 13 can do 180 ℃ of rotations.But the defective of this magnetic head assembly is, magnetic head keeps the position angle on the body 13 not determine at magnetic head, thereby the recording/reproducing condition is advanced to magnetic tape cassette and the stroke that returns is not certain when magnetic head is rotated 180 ℃ in the stroke that advances and return of tape.
The present invention makes at the problems referred to above just, the object of the present invention is to provide a kind of magnetic head unit of can be accurately and easily carrying out the head azimuth adjustment.
In order to achieve the above object, according to the present invention, a kind of magnetic head unit is provided, middle part of inserting interruption-forming wherein at a substrate, the head that magnetic head is fixed on this substrate inserts in the mouth, and this substrate is installed on the mounting plate, this mounting plate a magnetic recording media advance and the formation returned between the Rotate 180 degree, the upper-lower position that inserts mouthful at the head of substrate is provided with a pair of mounting hole, be used for substrate is assemblied in mounting plate, wherein a part of side of substrate constitutes a part of plane of the center line that contains an above-mentioned mounting hole as reference face, this reference surface is as carrying out the position reference portion that the position angle is adjusted to each magnetic head, substrate is contained on the mounting plate position reference portion and the location division that is arranged on the mounting plate in contact.
In magnetic head unit of the present invention, the position angle adjustment is to be undertaken by the position, angle of adjusting each magnetic head according to the reference section of this substrate.Therefore, do not need as in the prior art, carrying out the position angle adjustment based on a hypothetical reference position in the inner space of a mounting hole, and when adjusting head azimuth, can easily stipulate reference position, a location, to reach point-device high precision adjustment and easily to carry out position angle adjustment operation.
Below in conjunction with attached power embodiments of the invention are described.In the accompanying drawing:
Fig. 1 is the front view that shows according to a magnetic head unit of the present invention;
Fig. 2 is the skeleton view that shows the mounting plate be used to install a substrate of the present invention;
Fig. 3 is the front view of the substrate portion of another embodiment of the present invention;
Fig. 4 is the front view of the substrate portion of further embodiment of this invention;
Fig. 5 is the skeleton view that shows a traditional magnetic head unit;
Fig. 6 is the front view of device shown in Figure 5;
Fig. 7 is the skeleton view that shows the traditional mounting plate be used to install a substrate.
Fig. 1 has shown an embodiment according to magnetic head unit of the present invention.One stature inserts the middle part that mouth 3 is formed on a substrate 2 of magnetic head unit 1, and a recording/reproducing head 4 and an erase head 5 are loaded into this insertion mouth 3 respectively and are fixed therein by tackifier or similar thing.
A pair of tape guidance device 6 is formed on the position of these insertion mouth 3 both sides of substrate 2 to protrude forward.This tape guidance device 6 is clamped each side of recording/reproducing head 4 and erase head 5 and is had joint flange 7, this joint flange 7 be formed on the end of guide piece 6 and a side end of 4 and 5 against thereon.One is used to guide the magnetic recording tape that do not show is formed on this each guide piece 6 to the gathering sill 8 with respect to a precalculated position of 4 and 5 a end face.
In addition, mounting hole 9 is respectively formed at the position of the above and below of this insertion mouth 3 on the substrate 2.In this embodiment, as the reference of position reference portion and 13 by along one pass this bottom mounting hole 9 the center the horizontal line cutting and be formed on this relative both sides, substrate 2 bottoms.
In the above-described embodiments, this reference section forms the reference surface 13 based on bottom mounting hole 9.Yet this reference section can form arbitrary shape, for example, and the shape in cutting groove, lug boss or hole.Equally, this reference section can be formed on the optional position, for example, and the top of this substrate 2 or sidepiece.
In addition, as shown in Figure 2, also provide a mounting plate 10 that is used to install this substrate 2, it can be by a driver element Rotate 180 degree that does not show, and the positioning convex portion that engages with location substrate 2 with the reference surface 13 of this substrate 2 is formed on this mounting plate 10.
Below, will the operation of present embodiment be described.
In order to assemble this magnetic head unit 1 in the present embodiment, 4 and 5 head that are loaded into substrate 2 insert in mouthfuls 3 so that the joint flange 7 of 4 and 5 front edge and tape guidance device 6 against.At this state, carry out the position angle adjustment by adjust a position, angle of 4 and 5 based on the reference surface 13 of substrate 2 with a mounting plate that does not show.On the other hand, when each position of 4 and 5 is adjusted when making that its magnetic gap portion is set at a precalculated position with respect to the tape of being guided by the gathering sill 8 of substrate 2, this 4 and 5 by with tackifier or similarly thing be fixed on the substrate 2.
When by the position angle adjustment of above-mentioned steps magnetic head 4 and 5 and on substrate 2, fix oneself when being done, the reference surface 13 of substrate 2 is placed in positioning convex portion 14 butts with mounting plate 10, and the screw that does not show is threaded into by mounting hole 9 in the screw 12 of mounting plate 10, thus substrate 2 is fixed on this mounting plate 10.
Therefore, in the present embodiment, magnetic head 4 and 5 position angle adjustment be not resemble in prior art based on an imaginary reference position of the inner space of mounting hole 9 and carry out, but reference surface 13 on the substrate 2 carries out according to being formed on.Therefore can when adjust head azimuth, easily stipulate a position reference position and obtain the position angle adjustment of point-device high precision.In addition, the operation of head azimuth adjustment can easily be done.
Fig. 3 has shown an alternative embodiment of the invention, wherein, the head that reference protrusion portion as the positioning reference of eraser 5 is formed on substrate 2 projectedly inserts on mouthfuls 3 the inside surface and is positioned at position corresponding to the lower surface of an arrangement portion of this erase head 5, along the last back of substrate 2 to extension, and outer end with Accurate Shaping be easy to be deformed compress lug boss 16 be formed on projectedly on the inside surface on top of this substrate 2 facing to the position of this reference protrusion portion 15 and along last rear to extension.
In the present embodiment, erase head 5 head that is inserted in substrate 2 inserts this reference protrusion portion 15 in mouthfuls 3 and compresses between the lug boss 16 with the lower surface by these reference protrusion portion 15 location erase heads 5.Simultaneously, this compresses the upper surface that lug boss 16 was deformed and compressed erase head 5, thus erase head 5 is clamped in this positioning states.
In this example, lug boss 15 contacts with the upper and lower surface of erase head 5 with 16 modes that contact with a line or point.Therefore even also can easily carry out the position angle adjustment of erase head 55 in by the state of lug boss 15 and 16 clampings.
Therefore, in this embodiment, insert in the mouth 3 if erase head 5 only is inserted into the head of substrate 2, this erase head 5 will be maintained at the state of location and be positioned at based on reference protrusion portion 15 with by compressing the position that lug boss is set.Therefore, do not need to carry out the position adjustment of the erase head 5 in the prior art, and can easily locate erase head 5.
Because this erase head 5 is by lug boss 15 and 16 clampings, if it is fixed on the substrate 2 by tackifier, then its in fact by lug boss 15 and 16 and tackifier fix.Therefore, the retain strength of this erase head 5 can improve significantly and since the generation of not collimating of causing of the shrink tension of tackifier etc. can be prevented reliably.
Fig. 4 has shown another embodiment of the present invention, wherein, the head that one reference protrusion portion 15 is formed on substrate 2 projectedly inserts on the erase head 5 storing side inside surfaces of mouth 3, and a deformable lug boss 16 that compresses is formed on the recording/reproducing head 4 storing side inside surfaces of this insertion mouth 3 projectedly.
In this embodiment, the head that this recording/reproducing head 4 and erase head 5 are inserted in substrate 2 inserts the reference protrusion portion 15 on mouthfuls 3 and compresses between the lug boss 16 and causes a side that compresses lug boss 16 distortion and compress recording/reproducing head 4 simultaneously with the side by these reference protrusion portion 15 location erase heads 5, keeps this recording/reproducing head 4 and erase head 5 state in this location thus.
In addition, in this embodiment, lug boss 15 and 16 contacts side surfaces with a kind of line or the some way of contact and recording/reproducing head 4 and erase head 5.Therefore even also can easily be carried out a position angle adjustment of 4 and 5 in by the state of lug boss 15 and 16 clampings 4 and 5.
Therefore, in the present embodiment, insert in the mouth 3 if recording/reproducing head 4 and erase head 5 only are inserted into the head of substrate, they also will be clamped in this positioning states, and the situation of embodiment as shown in Figure 3 is the same.Therefore, this recording/reproducing head 4 and erase head 5 can easily be located.
Because this record 4 and erase head 5 be clamped in preposition by lug boss 15 and 16, when this 4 and 5 be need not by tackifier or when similarly thing is fixed on the substrate 2 the special assembling plate or similarly device in order to be pressed on the substrate 2 with 4 and 5.Therefore can simplify the structure of mounting plate and the assembly operation of head.
The foregoing description is to describe for the situation that recording/reproducing head and erase head are installed.But also can receive same effect for structure that reproducing head for example only is installed etc.
The present invention is not limited to the foregoing description, can make various distortion as required.
As mentioned above, in magnetic head unit according to the present invention, the position angle adjustment of each magnetic head is based on that the reference section that is formed on the substrate carries out, and has obtained thus in effects such as carrying out easily stipulating reference position, a location when head azimuth is adjusted, carry out the position angle adjustment of very accurate high precision, adjustment operation in position angle is easy to finish.
Claims (2)
1, a kind of magnetic head unit, middle part of inserting interruption-forming wherein at a substrate, the head that magnetic head is fixed on this substrate inserts in the mouth, and this substrate is installed on the mounting plate, this mounting plate a magnetic recording media advance and the stroke that returns between the Rotate 180 degree, the upper-lower position that inserts mouthful at the head of aforesaid substrate is being provided with a pair of mounting hole, be used for substrate is assemblied in above-mentioned mounting plate, it is characterized in that: a part of side of aforesaid substrate is as reference face, thereby constitute a part of plane of the center line that contains an above-mentioned mounting hole, this reference surface is as carrying out the position reference portion that the position angle is adjusted to above-mentioned each magnetic head, aforesaid substrate makes above-mentioned position reference portion be contained on the mounting plate in contact with the location division that is arranged on the above-mentioned mounting plate.
2, magnetic head unit as claimed in claim 1 is characterized in that, the head that at least one reference protrusion portion is formed on described substrate inserts on the inside surface of mouth.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP028951/1993 | 1993-02-18 | ||
| JP028951/93 | 1993-02-18 | ||
| JP2895193A JP2908953B2 (en) | 1993-02-18 | 1993-02-18 | Magnetic head unit and magnetic head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1096388A CN1096388A (en) | 1994-12-14 |
| CN1062081C true CN1062081C (en) | 2001-02-14 |
Family
ID=12262724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94101548A Expired - Fee Related CN1062081C (en) | 1993-02-18 | 1994-02-18 | Magnetic head unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2908953B2 (en) |
| CN (1) | CN1062081C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0323188A2 (en) * | 1987-12-25 | 1989-07-05 | Sharp Kabushiki Kaisha | Magnetic recording and reproducing head unit |
| CN1035574A (en) * | 1987-12-26 | 1989-09-13 | 德利信电机株式会社 | The mounting structure of automatic reverse type sound-track engraving apparatus counter-rotating magnetic head |
-
1993
- 1993-02-18 JP JP2895193A patent/JP2908953B2/en not_active Expired - Fee Related
-
1994
- 1994-02-18 CN CN94101548A patent/CN1062081C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0323188A2 (en) * | 1987-12-25 | 1989-07-05 | Sharp Kabushiki Kaisha | Magnetic recording and reproducing head unit |
| CN1035574A (en) * | 1987-12-26 | 1989-09-13 | 德利信电机株式会社 | The mounting structure of automatic reverse type sound-track engraving apparatus counter-rotating magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1096388A (en) | 1994-12-14 |
| JPH06243446A (en) | 1994-09-02 |
| JP2908953B2 (en) | 1999-06-23 |
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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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20010214 Termination date: 20110218 |