CN1584987A - Magnetic pickup - Google Patents
Magnetic pickup Download PDFInfo
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- CN1584987A CN1584987A CN 200410057475 CN200410057475A CN1584987A CN 1584987 A CN1584987 A CN 1584987A CN 200410057475 CN200410057475 CN 200410057475 CN 200410057475 A CN200410057475 A CN 200410057475A CN 1584987 A CN1584987 A CN 1584987A
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- projection
- magnetic head
- core
- basal component
- shielding box
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Abstract
In the magnetic head 1, a magnetic head constituent body L is housed inside the shield case 6 so that the front core part 3B faces a window part 6C, while base members 2a and 2b are disposed facing a body part 6A; a first protrusion 10A is provided near a front wall 6B and a second protrusion 10B is provided on the back side, in which the first protrusion 10A is positioned at the middle between a front gap G<f>and a back gap G<b>; and the first and the second protrusions 10A and 10B are engaged with spring parts 9A and 9B, respectively, so that the base members 2a and 2b are energized, respectively, and magnetic core assemblies K and K are brought into press contact with each other and are positioned in the shield case 6.
Description
Technical field
The present invention relates to a kind of magnetic head, particularly can reduce the magnetic head of part count.
Background technology
An example of the binaural recording reproduction pattern magnetic head of using as sound equipment, shown in Fig. 7 A and Fig. 7 B, the known magnetic head 106 that following formation is arranged, promptly, 2 core halves 100,101 that laminate the magnetic plate of multi-disc C font and make are installed on the tabular basal component 102, this basal component 102 (102a, 102b) is accommodated in the shielding box 105 and makes as a pair of.
Shown in Fig. 7 B, on the basal component 102a of a side, fixing above-mentioned core halves 100,101 and inserting in barricade 112 between them with the state that inserts.In addition, the foreign side of the basad member 102a of cephalic par of the cephalic par of these core halves 100,101 and barricade 112 gives prominence to and exposes configuration slightly from the window portion 115 that is formed on the shielding box 105.
In addition, on the opposing party's basal component 102b, also be provided with above-mentioned core halves 100,101 and barricade 113, the core halves 100a of a side shown in Fig. 7 B forms one group with the core halves 100b that faces mutually with it, constitute 1 magnetic core, the opposing party's core halves 101a forms one group with the diagram abridged core halves of facing mutually with it, constitutes another magnetic core, forms the magnetic head 106 of binaural recording reproduction pattern.In addition, on each magnetic core, coil member 110,110 is installed.
In addition, shielding box 105 has square tube portion 116 and the front side wall 117 of closing a side opening of this one 116.Wall 117 is provided with above-mentioned window portion 115 in front.In addition, on a side's of tube portion 116 inner face 116a, the basal component 102a that practises physiognomy and dispose a side over the ground, on the opposing party's of tube portion 116 inner face 116b, the basal component 102b that practises physiognomy and dispose the opposing party over the ground.
In addition, between a side's of tube portion 116 an inner face 116a and a side's basal component 102a, insert spacer block member 120.The side 121 of this spacer block member 120 is used as the reference field of the benchmark of the location that becomes basal component 102a.
In addition, between the opposing party's of tube portion 116 inner face 116b and the opposing party's basal component 102b, insert spring member 122.Utilize this spring member 122, basal component 102b is by moving to a side basal component 102a thruster, and a side basal component 102a is highlighted conflict on the reference field 121 of spacer block member 120.Like this, 2 magnetic cores that formed by the core halves 100,101 that is supported by basal component 102a, 102b just are positioned in shielding box 105.
In addition, in following patent documentation 1, announcing has following magnetic head, that is, on the wall of shielding box, be provided with groove, on the wall of an opposite side, insert insulcrete with groove with this groove, under the side end that makes core is engaged in state in these grooves, core received is loaded in the shielding box.
Patent documentation 1: the flat 2-108204 communique of special hope
But, in the magnetic head 106 shown in Figure 7, except basal component 102a, 102b, core halves 100,101, also need spacer block member 120 and spring member 122, it is many that part count becomes, thereby the component costs that can't reduce magnetic head 106 and the problem of manufacturing cost are arranged.
In addition, in the magnetic head of recording and narrating in the described patent documentation 1, owing to need insulcrete, so part count increases, and in addition, owing to form groove on shielding box, so manufacturing process becomes miscellaneous, thus the problem that has the cost of magnetic head to raise.
On the other hand; though shielding box is to be used to protect magnetic core not to be subjected to the parts of the influence of external magnetic field; but; because when the interval of shielding box and magnetic core is narrower; magnetic core just is easy to be subjected to the influence of external magnetic field; therefore, in the design of magnetic head, must be as far as possible with shielding box inner face and magnetic core configured separate.
Summary of the invention
The present invention implements in view of described situation, and purpose is, provides a kind of part count few, other magnetic head that is processed as Min. and magnetic core is separated with the shielding box inner face to shielding box.
In order to reach described purpose, the present invention has adopted following formation.
Magnetic head of the present invention is the magnetic head of following formation, promptly, the core halves that will have preceding core and a back core is installed on the basal component and forms the magnetic core assembly, before described, form anterior diastema respectively between the core, between the core of back, form post gap and make up a pair of this magnetic core assembly, constitute the magnetic head constituting body, by be provided with square tube portion and close this one a side opening front side wall and on described front side wall, form window portion and constitute shielding box, simultaneously, described magnetic head constituting body is in the inside of described shielding box, make described before core towards described window portion, described each basal component is taken in the face of described tube portion respectively, it is characterized in that, near the described front side wall of a pair of inner face of opposed facing described tube portion, the 1st projection is set respectively, simultaneously, rear portion side in the 1st projection is provided with the 2nd projection respectively, and described the 1st projection is positioned at the described anterior diastema of both sides of described magnetic head constituting body and the centre of described post gap, the a plurality of spring of formation portion on described each basal component, by the described the 1st, the 2nd projection does not combine with described a plurality of spring sections, described each basal component is promoted respectively, quilt crimping mutually between the described a pair of magnetic core assembly, simultaneously, in described shielding box, be positioned.
According to described magnetic head,, therefore just do not need spacer block member or spring member, thereby can reduce part count owing to utilize the spring portion that is located at the projection in the shielding box and is located on the basal component that the magnetic head constituting body is located in shielding box.
In addition, because the 1st projection is positioned at the centre of anterior diastema and post gap, therefore just can utilizes the 1st projection and spring member to apply impartial elastic force, thereby can prevent the offset between the core halves to anterior diastema and post gap.
In addition, magnetic head of the present invention is previous described magnetic head, it is characterized in that, compares with the interval between described the 1st projection, and the interval between described the 2nd projection is set widelyer.
According to described magnetic head, because the interval between the 2nd projection of rear portion side is wideer, therefore when inserting the magnetic head constituting body in the shielding box, just do not have the problem that contacts with the 2nd projection with the spring portion of the 1st projection combination, thereby can prevent the distortion of the spring portion that combines with the 1st projection.
In addition, magnetic head of the present invention is previous described magnetic head, it is characterized in that, utilizes embossing processing (emboss) to form described the 1st, the 2nd projection.According to this magnetic head, can easily form the 1st projection and the 2nd projection.
In addition, magnetic head of the present invention is previous described magnetic head, it is characterized in that, described spring portion and described basal component are integrally formed.According to this magnetic head, form spring portion owing to can wait by local stamping-out shaping to basal component, therefore can easily form spring portion.
As above shown in the explanation,,, the processing of shielding box etc. is also got final product for Min., so can reduce the component costs and the manufacturing cost of magnetic head because part count is few according to magnetic head of the present invention.
In addition, owing to, just can easily adjust the installation site of magnetic head constituting body on shielding box, so can precision carry out the location of magnetic head constituting body only by changing the formation position of the 1st projection and the 2nd projection goodly.Particularly, can utilize the formation position of the 1st, the 2nd projection to enlarge the distance of shielding box and core halves, thereby can reduce the influence of external magnetic field core halves.
In addition, by the 1st projection being located at the centre of anterior diastema and post gap, can add impartial elastic force to anterior diastema and post gap, thereby can prevent the offset between the core halves, in addition, on core halves, be difficult to produce distortion, thereby can eliminate the influence of magnetic variation shape.
Description of drawings
Figure 1A is the part sectioned view from the magnetic head of the present embodiment of seeing previously, and Figure 1B is the part sectioned view of the magnetic head of the present embodiment seen from the side.
Fig. 2 is the upward view of the magnetic head of present embodiment.
Fig. 3 is the stereographic map as the shielding box of the member of formation of the magnetic head of present embodiment.
Fig. 4 is the schematic top plan view of the relative position relation of expression the 1st projection, the 2nd projection and core halves.
Fig. 5 is the part sectioned view when seeing the assembling procedure of magnetic head of present embodiment from the front.
Fig. 6 A is the part sectioned view when seeing the assembling procedure of magnetic head of present embodiment from the front, and Fig. 6 B is the partial side view of Fig. 6 A.
Fig. 7 A is the part sectioned view from the magnetic head of seeing previously in the past, and Fig. 7 B is the part sectioned view of the magnetic head in the past seen from the side.
Among the figure: 1-magnetic head, 2a, 2b-basal component, 3, the 4-core halves, core before 3B, the 4B-, core behind 3C, the 4C-, the 6-shielding box, 6A-tube portion, 6B-front side wall, 6C-window portion, a pair of inner face of 6b, 6c-tube portion, 9,9A, 9B-spring portion, 10A-the 1st projection, 10B-the 2nd projection, G
f-anterior diastema, G
b-post gap, K-magnetic core assembly, L-magnetic head constituting body, the interval between M-the 1st projection, the interval between N-the 2nd projection.
Embodiment
Below with reference to accompanying drawings the magnetic head as embodiments of the present invention is described.Figure 1A is the part sectioned view from the magnetic head of the present embodiment of seeing previously, Figure 1B is the part sectioned view of the magnetic head of the present embodiment seen from the side, Fig. 2 is the upward view of the magnetic head of present embodiment, and Fig. 3 is the stereographic map as the shielding box of the member of formation of the magnetic head of present embodiment.
As Figure 1A, Figure 1B and shown in Figure 2, the magnetic head 1 following formation of present embodiment, promptly, on the basal component 2a, the 2b that make by the sheet metal that can carry out plastic working, core halves 3,4 and barricade 5a, 5b are installed and constitute magnetic core assembly K, K, in addition, constitute magnetic head constituting body L by making up 2 this magnetic core assembly K, L is accommodated in the shielding box 6 with this magnetic head constituting body.
In this mode, described shielding box 6 is as Fig. 1～shown in Figure 3, constitute by the 6A of tube portion of the quadrangular barrel shape that forms with 4 perisporium 6a with the front side wall 6B that the form of the side opening of closing these perisporiums 6a forms, be to utilize the pull and stretch processing etc. of metal material and integrated formation, the part of wall 6B forms fenestrate 6C in front.And, in the inside of shielding box 6, be fixed with described one group of magnetic core assembly K with resin by filling diagram abridged adhering resin.
Described core halves 3 as shown in Figure 2, be made with elongated rectangular plate shape core main part 3A, be formed at this core main part 3A a distolateral preceding core 3B, be formed at the approximate C font of back core 3C of the other end side of described core main part 3A.Back side (outer circumferential side of the core halves 3 of C font) at core main part 3A is formed with diagram abridged protuberance, and this protuberance is inserted in the diagram abridged through hole of being located on basal component 2a, the 2b.
In addition, the core halves 3 of this embodiment is made by magnetic materials such as NiFe, though be set as by mutual folder every the adhesive linkage of epoxies etc. and with 6 0.1mm of same shape the laminal magnetic sheet 3a about thick shown in Figure 1B stacked fixedly form laminate structure, can certainly be the core halves that constitutes by the thicker magnetic of a slice.
In addition, described core halves 3 is by inserting protuberance through hole or make it chimeric under the lip-deep state that its planar portions 3D is pressed against basal component 2a, 2b, and is fixed on basal component 2a, the 2b.
According to as above situation, core halves 3 is by being pressed against basal component 2a with its planar portions 3D, go up and at basal component 2a on the surface of 2b (plane), thickness direction (Figure 1A of 2b, the Z direction of Figure 1B and Fig. 2) is positioned on, in addition, insert diagram abridged through hole by illustrating the abridged recess, and carry out thickness direction (Figure 1A of core halves 3, the directions X of Figure 1B and Fig. 2) and length direction (Figure 1A of core halves 3, the Y direction of Figure 1B and Fig. 2) location, as a result, core halves 3 is at directions X, the Y direction, all be positioned at basal component 2a on 3 directions of Z direction by precision goodly, on the 2b.
In addition, identical with the situation of core halves 3, core halves 4 is by inserting diagram abridged through hole with its diagram abridged protuberance, and be fixed on basal component 2a, the 2b, identical with the situation of above-mentioned core halves 3, core halves 4 is all located by precision on X, Y, any one direction of Z goodly.
In addition, on barricade 5a, 5b, the back side all is formed with diagram abridged protuberance in the central, insert in the hole by the diagram abridged of this protuberance being inserted basal component 2a, 2b, and be fixed on basal component 2a, the 2b, identical with the situation of above-mentioned core halves 3, barricade 5a, 5b are located by precision on X, Y, any one direction of Z goodly.
In addition, as above shown in the explanation, on the bonding part of being fixed in core halves 3,4 on basal component 2a, the 2b and barricade 5a, 5b by precision goodly, fill the diagram abridged bonding agent of required MIN amount, core halves 3,4 and barricade 5a, 5b are firmly fixed.
In addition, as shown in Figure 1, the bobbin 26 of the coil that is used to reel is installed, the bobbin 27 of the coil that is used to reel is installed in back core 4C, the 4C side of core halves 4,4 in back core 3C, the 3C side of core halves 3,3, terminal rod 28 is outstanding from bobbin 26, and terminal rod 29 is outstanding from bobbin 27.
In addition, with 2 at basal component 2a, has core halves 3 on the 2b, 4 and barricade 5a, the magnetic core assembly K of 5b constitutes magnetic head constituting body L, and make their core halves 3 respectively, between 3, core halves 4, between 4, barricade 5, connect between 5, this magnetic head constituting body L is inserted in the shielding box 6, in addition, form core halves 3,4 head end side and barricade 5a, the head end side of 5b is from the outstanding slightly state of the 6C of window portion of shielding box 6, fill diagram abridged bonding agent in the inside of shielding box 6, with magnetic core assembly K, K formally is fixed on the inside of shielding box 6 and constitutes magnetic head 1.
In addition, shown in Figure 1A, core halves 3,3 will preceding core 3B, 3B and back core 3C, 3C between connect and integrated.In addition, by being docked, preceding core 3B, 3B form anterior diastema G
f, form post gap G by back core 3C, 3C are docked
b
Equally, on core halves 4,4,, preceding core 4B, 4B form anterior diastema G by being docked
f, form post gap G by back core 4C, 4C are docked
b
Below magnetic core set dress body K, the installation constitution of K (magnetic head constituting body L) on shielding box 6 are described.
At first, as Figure 1A, Figure 1B and shown in Figure 2, on basal component 2a, 2b, be formed with a plurality of spring 9... of portion.Each 9... of spring portion is that a part of stamping-out with basal component 2a, 2b becomes ligule to form as cantilever spring, becoming one of stiff end distolaterally is connected with basal component 2a, 2b respectively, form one with basal component 2a, 2b, in addition, it is close to become free-ended another distolateral and perisporium 6a side shielding box 6.
On a side basal component 2a, be formed with 4 spring portions 9, on the opposing party's basal component 2b, also be formed with 4 spring portions 9.On a side basal component 2a, in its head end side, form 2 9A of spring portion, 9A by rear portion side slightly in part than locking plate 7a, 8a, in addition, side is formed with 2 9B of spring portion, 9B in its back-end.In addition, the 9B of spring portion, the 9B that are formed at rear end side compare with the 9A of spring portion, the 9A that are formed at the head end side, by to moving with the more approaching thruster of perisporium 6a.
On the opposing party's basal component 2b, lean on rear portion side to form 2 9A of spring portion, 9A in its head end side slightly than the part of locking plate 7b, 8b similarly, in addition, side forms 2 9B of spring portion, 9B in its back-end.In addition, the 9B of spring portion, the 9B that are formed at rear end side compare with the 9A of spring portion, the 9A that are formed at the head end side, by to moving with the more approaching thruster of perisporium 6a.
In addition, the inner face at the 6a of tube portion of shielding box 6 utilizes embossing to be processed to form a plurality of projection 10....On opposed facing a pair of inner face 6b, 6c in the middle of the inner face that constitutes the tube 6A of portion, form 4 each projection 10... respectively.As shown in Figures 1 and 2, near the front side wall 6B of a side inner face 6b, be provided with a pair of the 1st projection 10A, 10A, be respectively equipped with the 2nd projection 10B, 10B in the rear portion side of the 1st projection 10A, 10A.Equally, as shown in Figures 1 and 2, near the front side wall of the opposing party's inner face 6b, be provided with a pair of the 1st projection 10A, 10A, be provided with the 2nd projection 10B, 10B in the rear portion side of the 1st projection 10A, 10A.
In addition, as Figure 1A, Figure 1B and shown in Figure 2, the 9A of spring portion, the 9B of basal component 2a combines with the 1st projection 10A of inner face 6b side and the 2nd projection 10B.In addition, the 9A of spring portion, the 9B of basal component 2b combine with the 1st projection 10A and the 2nd projection 10B of inner face 6c side.Because the 9A... of spring portion, 9B... are promoted towards the perisporium 6a of shielding box 6 from basal component 2a, 2b respectively, therefore the 1st projection 10A... and the 2nd projection 10B... form by the state of the expulsive force of the 9A... of spring portion, 9B... pushing.Because the 1st projection 10A... and the 2nd projection 10B... are fixed on the shielding box 6, will be benchmark towards anterior diastema G therefore with basal component 2a, 2b
fAnd post gap G
bThe direction of side produces the reacting force with respect to the 9A... of spring portion, 9B....Before between the core 3C of between the core 3B and back by the crimping consumingly of this reacting force, thereby always with certain engaging force with anterior diastema G
fAnd post gap G
bButt joint, simultaneously, magnetic core assembly K, K are located along the Z direction in shielding box 6.
The relative position relation of expression the 1st projection, the 2nd projection and core halves among Fig. 4.
As shown in Figure 4, the interval N between the 2nd projection 10B, the 10B is set to wideer than the interval M between the 1st projection 10A, the 10A.By setting the interval between the 2nd projection 10B, the 10B of rear end side wideer like this, when inserting magnetic head constituting body L in the shielding box 6, near the head end of basal component 2a, 2b the 9A of spring portion, 9A just can not contact with the 2nd projection 10B, 10B, thereby prevented the distortion of the 9A of spring portion, 9A.In addition, by widening the interval N of the 2nd projection 10B, 10B, the guide member that just can make it when magnetic head constituting body L is inserted shielding box 6 plays a role, thereby can make magnetic head constituting body L be configured in the substantial middle position of shielding box 6.
In addition, as shown in Figure 4, when will be along anterior diastema G
fWith post gap G
bThe interval of gap depth direction when being made as P, the 1st projection 10A, 10A be clearance G in the past just
fBe partial to post gap G along the gap depth direction with P/2
bBe provided with.That is, the 1st projection 10A, 10A are located at the both sides of magnetic head constituting body L, are positioned at anterior diastema G
fWith post gap G
bRoughly centre position.Like this, the expulsive force that produces between the 1st projection 10A, 10A and the 9B of spring portion just is added in anterior diastema G equably
fAnd post gap G
bOn, thereby can prevent offset between core halves 3..., the 4....
Below, the assemble method of the magnetic head 1 of present embodiment is described.Fig. 5 is the part sectioned view when seeing the assembling procedure of magnetic head 1 from the front, and Fig. 6 A is the part sectioned view when seeing the assembling procedure of magnetic head 1 from the front, and Fig. 6 B is the partial side view of Fig. 6 A.
As shown in Figure 5, core halves and barricade are installed on the basal component and assemble 2 magnetic core assembly K, make magnetic core assembly K, K butt joint then, form magnetic head constituting body L, it is configured in the peristome side of shielding box 6.In addition, magnetic head constituting body L is inserted shielding box 6.
Shown in Fig. 6 A and Fig. 6 B, make the head end of magnetic head constituting body L outstanding from the 6C of window portion of shielding box 6.At this moment, make the 9A... of spring portion and the 1st projection 10A combination of basal component, make 9B... of spring portion and the 2nd projection 10B... combination.By the 9A... of spring portion, 9B... and the 1st, the 2nd projection 10A..., 10B... are combined, carry out the location of the Z direction of magnetic head constituting body L.In addition, because the 1st projection 10A... is positioned at anterior diastema G
fWith post gap G
bThe centre, therefore in each clearance G
f, G
bOn add impartial elastic force, thereby prevented the offset of core halves 3..., 4....
Under this state, will illustrate the abridged resin and inject in the shielding box 6, shielding box 6 and magnetic head constituting body L is fully fixing.
At last, along the front side wall 6B of the grinding line S grinding shielding box 6 shown in Fig. 6 A and Fig. 6 B.By front side wall 6B is carried out grinding, stipulate medium slipping plane, and correctly stipulate anterior diastema G with respect to magnetic medium such as tapes
fThereby, obtain magnetic head 6 as final products.
According to described magnetic head,, therefore just do not need spacer block member or spring member, thereby can reduce part count owing to utilize the spring portion that is located at the projection in the shielding box and is located on the basal component that the magnetic head constituting body is located in shielding box.
In addition, because first projection is positioned at the centre of anterior diastema and post gap, therefore can utilizes first projection and spring member that anterior diastema and post gap are applied impartial elastic force, thereby can prevent the offset between the core halves.
In addition, because the interval of second projection of rear portion side is wideer than the interval of the 1st projection, therefore when the magnetic head constituting body is inserted shielding box, just do not have the problem that contacts with second projection with the spring portion of the first projection combination, thereby can prevent the distortion of the spring portion that combines with first projection.
In addition, owing to utilize embossing to be processed to form described the 1st, the 2nd projection, therefore can easily form the 1st, the 2nd projection.
In addition, because spring portion and basal component be integrally formed, can wait and form spring portion by the part of basal component being carried out the stamping-out shaping, so can easily form spring portion.
Claims (4)
1. magnetic head, it is the magnetic head of following formation, the core halves that will have preceding core and a back core is installed on the basal component and forms the magnetic core assembly, before described, form anterior diastema respectively between the core, between the core of back, form post gap and make up a pair of this magnetic core assembly, constitute the magnetic head constituting body, by square tube portion is set and close this one a side opening front side wall and on described front side wall, form window portion and constitute shielding box, simultaneously, described magnetic head constituting body is in the inside of described shielding box, make described before core towards described window portion, will described each basal component face described tube portion respectively and take in, it is characterized in that
Near the described front side wall of a pair of inner face of opposed facing described tube portion, the 1st projection is set respectively, simultaneously, the 2nd projection is set respectively in the rear portion side of the 1st projection, and described the 1st projection is positioned at the described anterior diastema of both sides of described magnetic head constituting body and the centre of described post gap
The a plurality of spring of formation portion on described each basal component, do not combine with described a plurality of spring sections by described the 1st, the 2nd projection, described each basal component is promoted respectively, quilt crimping mutually between the described a pair of magnetic core assembly, simultaneously, in described shielding box, be positioned.
2. magnetic head according to claim 1 is characterized in that, compares with the interval between described the 1st projection, and the interval between described the 2nd projection is set widelyer.
3. magnetic head according to claim 1 is characterized in that, utilizes embossing to be processed to form described the 1st, the 2nd projection.
4. magnetic head according to claim 1 is characterized in that, described spring portion and described basal component are integrally formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003295318A JP2005063609A (en) | 2003-08-19 | 2003-08-19 | Magnetic head |
| JP2003295318 | 2003-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1584987A true CN1584987A (en) | 2005-02-23 |
Family
ID=34371611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410057475 Pending CN1584987A (en) | 2003-08-19 | 2004-08-12 | Magnetic pickup |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005063609A (en) |
| CN (1) | CN1584987A (en) |
-
2003
- 2003-08-19 JP JP2003295318A patent/JP2005063609A/en not_active Withdrawn
-
2004
- 2004-08-12 CN CN 200410057475 patent/CN1584987A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005063609A (en) | 2005-03-10 |
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