CN1069143C - Magnetic head - Google Patents
Magnetic head Download PDFInfo
- Publication number
- CN1069143C CN1069143C CN96120828A CN96120828A CN1069143C CN 1069143 C CN1069143 C CN 1069143C CN 96120828 A CN96120828 A CN 96120828A CN 96120828 A CN96120828 A CN 96120828A CN 1069143 C CN1069143 C CN 1069143C
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- Prior art keywords
- ground connection
- conducting terminal
- binding post
- core
- magnetic head
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 239000007769 metal material Substances 0.000 claims description 5
- 238000005476 soldering Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 9
- 239000011521 glass Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 229920002457 flexible plastic Polymers 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Images
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- Magnetic Heads (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Multi-Conductor Connections (AREA)
Abstract
To eliminate the need for executing soldering in the narrow places in a slider by projecting metallic terminals outward from this slider. The front ends of the leg parts of cores 1a, 1b, 2a, 2b and a back core 6 on one side flanks at the front ends of these leg parts the held by a clip having a spring characteristic and this clip is partly providing integrally with a grounding conductive terminal 16c. This grounding conductive terminal 16c is extended in a moving direction of a metallic terminal and is connected by soldering to a flexible wiring board.
Description
The present invention relates in the face of magnetic recording media for example flexible plastic disc write down and reset or erase the magnetic head of the magnetic signal on the recording medium, or rather, the present invention relates on the iron core that forms magnetic gap, have the magnetic head of earthing device.
Please refer to Jap.P. now and disclose No. 234231/1993 application, the magnetic head that Fig. 6～Fig. 9 explanation is used in flexible plastic disc drives.Magnetic head shown in the figure has preceding core construction, and preceding core construction comprises the recording/reproducing core portion 1 and the core portion 2 of erasing.Preceding core construction F is by making such as the such magnetic material of ferrite.
Recording/reproducing core portion 1 is that the iron core by the 1a unshakable in one's determination of an inverted T-shaped and an I type 1b is bonded to each other and forms, and the coupling part between two iron cores forms recording/reproducing magnetic gap 1G.Core portion of erasing 2 and recording/reproducing core portion 1 are with the form setting of symmetry.The core portion of erasing 2 is bonded to each other by inverted T-shaped 2a unshakable in one's determination and I shape 2b unshakable in one's determination and forms, and forms the magnetic gap 2G that erases on the coupling part between two iron cores.With nonmagnetic substance for example adhering glass 3 I shape 1b unshakable in one's determination and 2b are bonded together mutually with the form that magnetic each other separates.
The vertical part of T shape 1a unshakable in one's determination by resin coil frame 4 around, twining recording/reproducing coil C1 on the coil former 4, same, the vertical part of T shape 2a unshakable in one's determination by coil former 5 around, twining the coil C2 that erases on the coil former 5.With phosphor bronze or beryllium copper elasticity clamping element 10 back core 6 is clipped on the side of the top of the vertical part of T shape 1a, 2a unshakable in one's determination and I shape 1b unshakable in one's determination, 2b head portion, and it is pressed against each other.Be clipped between a plurality of clamping part 10b of the 10a of backboard portion of clamping element 10 and clamping element 10 being contained in back core on 1a unshakable in one's determination, 1b, 2a and the side, 2b top.The thrust of elasticity clamping element 10 is pressed in back core 6 top of 1a unshakable in one's determination, 1b, 2a and 2b securely.
Back core 6 is made up of two plate 6a unshakable in one's determination and 6b, and two blocks of plates unshakable in one's determination are connected with each other by adhering glass 7.A plate 6a unshakable in one's determination is contained on the side on each T shape 1a unshakable in one's determination and I shape 1b unshakable in one's determination top, in recording/reproducing core portion 1, forms the magnetic circuit of sealing.Equally, another piece plate 6b unshakable in one's determination is installed on the side on each T shape 2a unshakable in one's determination and I shape 2b unshakable in one's determination top, in the core portion 2 of erasing, form the magnetic circuit of sealing.
Have the binding post erecting frame 4a, the 5a that make by the same resin material on the top of coil former 4,5 respectively.Have binding post 4b, 4c and 4d on the binding post erecting frame 4a, and on binding post erecting frame 5a, have binding post 5b, 5c and 5d.The lead that stretches out from coil C1 and C2 is soldered on each binding post.
Recording/reproducing core portion 1 and the core portion 2 of erasing are inserted between two halves slide mass 8a, the 8b of nonmagnetic substance slider 8 and have just constituted magnetic head.
The magnetic head of such formation is installed by mode shown in Figure 9.Specifically, with the bonding agent (not shown) magnetic material shielding part 13 around the slider 8 is bonded on the support 11.With the bonding agent (not shown) flexible print circuit board (FPC) 12 is bonded on the upper surface of support 11.Being contained in binding post 4b, 4c, 4d, 5b, 5c and 5d on the binding post erecting frame 4,5 passes the hole on support 11 and the flexible print circuit board 12 and reaches on the flexible print circuit board 12.So just, binding post 4b, 4c, 4d, 5b, 5c and 5d can be soldered on the conductor foil circuit diagram that forms at flexible print circuit board 12 tops.
Have a pair of disk on the floppy disk, this centre to disk is inserted with flexible plastic disc, and as shown in Figure 7, a magnetic head (face 1) that is positioned on the disk is supported by support 11.And the slider 8 that will be positioned at another magnetic head (face 0) below the disk bonds on the plate (not shown) that does not have an elastic deformation securely.The lower surface of plate is supporting a flexible print circuit board, and binding post 4b, 4c, 4d, 5b, 5c and 5d on the circuit diagram on the wiring board and another magnetic head coil frame are welded together.
In these magnetic heads, the circuit diagram on the flexible print circuit board 12 links to each other with C2 with coil C1 by binding post.
The slidingsurface of said head (bottom side among Fig. 6) slides on flexible plastic disc and can write or sense data.Sliding process can produce static, the further core construction F charging forward of this static.When the charge volume of static surpasses a certain threshold value, at preceding core construction F with between their nearest any conductors atmospherical discharges will take place.If atmospherical discharges, impaired will be not only magnetic head, and also have other electric elements relevant with magnetic head.In order to prevent to occur such problem, as shown in Figure 7, a kind of known magnetic head has sheet tin formula lead A, before the end of this lead A is welded to back core 6 is clipped among the core construction F on the clamping element 10 of each 1a unshakable in one's determination, 2a and 2b top one side, and its other end is soldered on the grounding circuit (not shown) of flexible print circuit board 12, constituted thus make fill static and drain to structure the grounding circuit from back core 6.As shown in Figure 8, in the known magnetic head of another kind, be the top of 1a unshakable in one's determination, 1b, 2a and 2b among back core 6 or the preceding core construction F to be bonded on the grounding circuit on support 11 or the flexible print circuit board 12 with electrically conducting adhesive.
In ground structure shown in Figure 7, lead A is soldered on the clamping element 10 that is contained in slider 8 inside.The welding operation of the clamping element 10 between lead A and two halves slide mass 8a, the 8b is to carry out in the effective clearance in slider 8.Limited space has increased the difficulty of welding operation.When carrying out welding operation under this condition, if there is any external force to be added on the magnetic head, for example impact of falling to causing because of object all can make the lead A that has welded break away from from clamping element 10.Lead A is not easy to connect up in little gap and is difficult to make lead A to be maintained fixed at weld period is the reason that causes welding quality not high.From closely spaced angle, soldering appliance that can't be easy to use or automatic welding machine and similar machine.Therefore, must come welding lead A by hand.Thus, not only welding capacity changes, and weld strength also changes, and its result causes the quality of magnetic head to descend.
Before bonding to slider 8 on the support 11, lead A is soldered on the clamping element 10, and makes lead A pass hole on the support 11.Then slider 8 is bonded on the support 11 and lead A is soldered on the grounding circuit in the flexible print circuit board 12.The production process that this process comprises is too much also too complicated, thereby has limited yield of unit time.
In ground structure shown in Figure 8, the set time of electrically conducting adhesive B is oversize, thereby can reduce the throughput rate of magnetic head.And magnetic head must keep static before electrically conducting adhesive B full solidification.This causes the interstage in production run, makes a large amount of magnetic heads be in halted state for curing, has influenced production efficiency therefrom.
Therefore, the purpose of this invention is to provide a kind of magnetic head, the electrostatic energy that is filled is spilt reliably thereby wherein iron core is fixedly connected to.
Another object of the present invention provides a kind of magnetic head, and this magnetic head helps finishing at short notice the ground connection operation.
To achieve these goals, the invention provides a kind of magnetic head, comprise the preceding iron core that forms magnetic gap, with the described preceding back core that contacts unshakable in one's determination, be contained in the coil former on the described preceding iron core, be contained in the binding post on the described coil former, elastomeric element with electric conductivity, it makes described preceding iron core become contact condition with back core with the pressure of stipulating and is clamped, and cover the slider of described back core at least, wherein, ground connection conducting terminal and elastomeric element form one, and when preceding iron core and back core were clamped by elastomeric element, the ground connection conducting terminal was given prominence to the direction of regulation, so that the pressure with regulation contacts with binding post on being set in coil former, outwards give prominence to from slider with the contacted binding post of ground connection conducting terminal.
Wherein outwards outstanding from slider with the contacted ground connection conducting terminal of described binding post.
Above-mentioned elastomeric element is made by metal material, and it comprises back board part and the clamping part that constitutes clamping element, and iron core and back core before this two parts clamping also comprise crooked ground connection conducting terminal.
The present invention also provides a kind of magnetic head, comprise the preceding iron core that forms magnetic gap, with described preceding contacted back core unshakable in one's determination, elastomeric element with electric conductivity, it makes described preceding iron core and back core become the slider that back core was also clamped and covered at least to contact condition with the pressure of regulation, wherein ground connection conducting terminal and elastomeric element form one, and the ground connection conducting terminal is outwards outstanding from slider.
Above-mentioned elastomeric element is made by metal material, and it comprises back board part and the clamping part that constitutes clamping element, and iron core and back core before this two parts clamping also comprise crooked ground connection conducting terminal.
The embodiment of magnetic head of the present invention is discussed below in conjunction with accompanying drawing.In the accompanying drawings the parts identical with prior art have been marked identical reference number.
Fig. 1 is a skeleton view of representing to be used in one embodiment of the invention the magnetic head of floppy disk driver;
The planimetric map of Fig. 2 magnetic head of the present invention that to be expression be connected with printed-wiring board (PWB) with support;
Fig. 3 is the cross sectional side view of the pith of magnetic head shown in the presentation graphs 2;
Fig. 4 is the sectional view of the major part of magnetic head shown in the presentation graphs 2, and wherein binding post is welded on the ground connection conducting terminal of clamping element;
Fig. 5 is the skeleton view of clamping element of the present invention;
Fig. 6 is the skeleton view that is illustrated in the magnetic head that uses in the prior art when disk drive;
Fig. 7 is the sectional view under cuing open along the line V-V among Fig. 6, the ground structure of its expression prior art;
Fig. 8 is a sectional view of taking from Fig. 6 center line V-V place, and it represents the ground structure of another kind of prior art;
Fig. 9 is the head side view of expression prior art, is welded with printed-wiring board (PWB) on the magnetic head.
With reference to Fig. 1～Fig. 5 embodiments of the invention are discussed below.In these figure, the preceding core construction F of magnetic head is made up of the recording/reproducing core portion 1 that comprises T shape 1a unshakable in one's determination and I shape 1b unshakable in one's determination and the core portion 2 of erasing that comprises T shape 2a unshakable in one's determination and I shape 2b unshakable in one's determination.These iron cores are by making such as the such magnetic material of ferrite.On magnetic head to the surface of magnetic recording media or the slidingsurface of magnetic head, be in the basal surface among Fig. 1, with melten glass 14a T shape 1a unshakable in one's determination is bonded on the I shape 1b unshakable in one's determination, melten glass is made after resin-based bonding agent and glass are mixed, temperature characterisitic be can improve like this, and record and playback magnetic gap 1G formed by melten glass.Equally, with melten glass 14b T shape 2a unshakable in one's determination is bonded on the I shape 2b unshakable in one's determination, thereby formed the magnetic gap 2G that erases.By nonmagnetic substance for example adhering glass 3 the I shape that constitutes recording/reproducing core portion 1 1b unshakable in one's determination is bonded on the I shape that constitutes the core portion 2 of the erasing 2b unshakable in one's determination.
The T shape 1a unshakable in one's determination that constitutes recording/reproducing core portion 1 is equipped with coil former 4 and 5 respectively with the T shape core portion 2a that constitutes the core portion 2 of erasing.In preceding core construction F, four vertical part 1a, 1b, 2a and 2b extend from head surface towards magnetic recording media and by adhering glass 3 I shape 1b unshakable in one's determination and 2b are bonded together, thereby make recording/reproducing core portion 1 and the core portion 2 of erasing forms a complete structure.
The vertically part unshakable in one's determination that outwards is provided with promptly is equipped with coil former 4 and 5 on T shape 1a unshakable in one's determination and the 2a.Recording/reproducing coil C1 and erases coil C2 on coil former 5 on coil former 4.
Binding post erecting frame 4a and 5a are equipped with in coil former 4 and 5 top, they constitute one with coil former 4,5 and material therefor identical.The top of binding post erecting frame 4a is provided with three binding post 4b, 4c and 4d.Equally, the top of binding post erecting frame 5a is equipped with three binding post 5b, 5c and 5d.In recording/reproducing coil C1, two leads on the periphery of coil former 4 and be connected between binding post 4c and the 4d, and with other two leads on the periphery of coil former 4 and be connected between binding post 4b and the 4c.That is, binding post 4c is used as common terminal.Adopting such layout is in order to set up the opposite magnetic field of phase place.On the contrary, erase coil 2 forms bias fields separately.Coil two ends on coil former 5 link to each other with 5d with binding post 5b respectively.Binding post 4b, 4c, 4d, 5b, 5c and 5d preferably adopt metal material.Coil former 4 and 5 is made of resin usually.Can when making coil former 4 and 5, make binding post.In this case, can make binding post with the electroconductive resin different with coil former 4 and 5.
By means of the pressing piece that is made of phosphor bronze or beryllium copper elasticity clamping element 16 back core 6 is clipped in T shape 1a unshakable in one's determination, 2a is the top and the I shape 1b unshakable in one's determination of part vertically, compresses on the side at 2b top and with it.Clamping element 16 is 1a unshakable in one's determination, 1b, and the top of 2a and 2b and back core 6 is clipped between the back board part 16a and a plurality of clamping part 16b of clamping element 16, makes back core 6 and each 1a unshakable in one's determination by the thrust of clamping element 16,1b, 2a and 2b are bonded together tightly.1a unshakable in one's determination, 1b, 2a and 2b, back core 6 and clamping element 16 are electrical connected reliably, even also still can keep actual engagement and electrical connection between these parts when the floppy disk driver that cooperates with magnetic head of the present invention is subjected to impact that falling objects for example causes.
The back board part 16a of longitudinal extension links to each other with the bottom of clamping element 16 by vertical coupling part 16f.Clamping element 16 has a plurality of clamping part 16b, and these parts are vertically stretched out and outwards curved skewed so that match with back core 6 at certain altitude.
As mentioned above in the face of a plurality of clamping part 16b of back board part 16a along its vertical line bending, and ground connection conducting terminal 16c is vertically stretched out and outward-dipping bending from a minor face of clamping element 16 bottoms.Clamping element 16 is box-like structure basically, and its other end relative with ground connection conducting terminal 16c is the opening shape.The breach 16e that the bottom of clamping element 16 has the breach 16d that passes through for T shape 2a unshakable in one's determination and supplies I shape 1b unshakable in one's determination and 2b to pass through.
Installation to the clamping element of so making is discussed below.The top that clamping element 16 is put into coil former 4 and 5 makes it to be between binding post erecting frame 4a and the 5a, and its back board part 16a is positioned at slide mass 8a one side half, and the inside surface of back board part 16a and each 1a unshakable in one's determination, 1b, the contacts side surfaces of 2a and 2b.The thrust that overcomes clamping part 16b is inserted into inside surface and the 1a unshakable in one's determination of clamping part 16b to back core 6, and 1b is between 2a and the 2b.Insert after the back core, owing to the thrust of clamping element 16 makes back core 6 and 1a unshakable in one's determination, 1b, 2a and 2b force together tightly.Ground connection conducting terminal 16c is outwardly-bent from the middle part to the end, so that contact with binding post 5c behind the pressurized.
Contact so that the aperture 12e that forms on the ground path weld zone of aftermentioned flexible print circuit board 12 not only holds terminal 16c but also hold connection terminal 5c with binding post 5c after preferably making ground connection conducting terminal 16c pressurized.If will try to achieve so not strict to the circuit gap of flexible print circuit board 12, do not require that promptly the ground connection conducting terminal 16c behind the pressurized contacts with binding post 5c, then can be on flexible print circuit board 12 hole respectively with binding post 5c or bore a macropore 12e for ground connection conducting terminal 16c so that they are linked to each other with ground path 17a.
In this embodiment, the effect that constitutes the flexible print circuit board 12 of printed circuit board (PCB) is to constitute the path that grounding circuit is linked to each other with binding post 5c, binding post 5c wherein is by clamping element 16 and 1a unshakable in one's determination, and 1b, 2a link to each other with 2b and link to each other with the ground connection conducting terminal 16c of clamping element 16.
Shown in Fig. 2-4, flexible print circuit board 12 is contained on the surface of support 11, be bonded with the surperficial relative of magnetic head on this surface and the support 11.Be furnished with many Copper Foil conducting wires 17 on the flexible print circuit board 12 of formation printed circuit board (PCB).The weld zone of many conducting wires comprises six aperture 12a-12f.
In addition, on support 11, be provided with conducting wire 17 in the corresponding aperture that matches of hole 12a-12f, the open region in these holes is slightly larger than the hole in the conducting wire 17 on the support 11, so binding post can not run into support 11.Having one in many conducting wires 17 is ground path 17a, and this circuit is the same with other circuit to be constituted with Copper Foil.The hole that forms on the weld zone of earth lead 17a has the open region greater than other hole, so that binding post 5c and ground connection conducting terminal 16c can be passed from the hole.
When on the bottom surface that the slider 8 of magnetic head is bonded to support 11 and printed-wiring board (PWB) 12, bonding to support 11 top sides, the record and the playback binding post 4b that are contained on the coil former 4,4c and 4d inserted through hole on the support 11 and the aperture 12a on the printed-wiring board (PWB) 12,12b and 12c make it be welded on the printed-wiring board (PWB) 12 from printed-wiring board (PWB) 12 outwards outstanding segment distances and with binding post.In the same way, with the binding post 5b on the coil former 5 of erasing, 5c and 5d insert aperture 12d, 12e and 12f.In this case, as shown in Figure 4, it is contacted with indirect terminal 5c on the binding post erecting frame 5a that is contained in coil former 5 to having equal length with binding post 5c or exerting pressure than its slightly short ground connection conducting terminal 16c.In this case, make binding post 5c and ground connection conducting terminal 16c pass aperture 12e together.With binding post 4b, 4c, 4d, 5b, 5c and 5d are soldered on the weld zone of circuit 17 on the printed-wiring board (PWB) 12 to guarantee conduction by scolding tin 18.Make 1a unshakable in one's determination in this way, 1b, 2a, 2b, 6a and 6b ground connection.
In another embodiment of the present invention, because the ground connection conducting terminal 16c of clamping element 16 exerted pressure it is contacted with binding post 5c, so be not to make binding post 5c and ground connection conducting terminal 16c together but binding post 5c is projected into outside the slider 8 weld.This layout can be guaranteed iron core grounding equally.
Under the situation that does not have binding post 5c, reach to weld outside the slider too by the ground connection conducting terminal 16c that makes clamping element 16 and can guarantee iron core grounding.In this case, do not need to make ground connection conducting terminal 16c and the contacted manufacturing process of binding post 5c, and can make the hole 12e that forms in the weld zone of ground path 17a on printed-wiring board (PWB) 12 less by exerting pressure.
In another embodiment of the present invention, do not use printed-wiring board (PWB) 12.Wire bonds on the binding post 5c or ground connection conducting terminal 16c that reach outside the slider 8, and with wire bonds to grounding circuit.In this case, binding post 5c or ground connection conducting terminal 16c are reached outside the slider 8, can obtain like this, thereby can finish the welding operation of lead easier and more reliably than the bigger space of prior art shown in Fig. 7 and 8.
Preferably ground connection conducting terminal 16c being exerted pressure makes it contact with binding post 5c, and the size of the aperture 12e that forms in the earth lead 17a weld zone that can make like this at printed-wiring board (PWB) 12 is less.If to the space constraint on the circuit of flexible print circuit board 12 is not so strict, just not needing ground connection conducting terminal 16c exerted pressure makes it to contact with binding post 5c, but can hole respectively with binding post 5c for ground connection conducting terminal 16c on flexible print circuit board 12 or bore a bigger hole 12e so that they are connected with earth lead 17a.In this case, can omit the manufacturing process that ground connection conducting terminal 16c is linked to each other with binding post 5c.
Position and the structure of ground connection conducting terminal 16c on the clamping element 16 are not limited to embodiments of the invention.For example, ground connection conducting terminal 16c can stretch out from back board part or clamping part 16b.Ground connection conducting terminal 16c can also be arranged on the offside of clamping element 16.
As mentioned above, according to magnetic head of the present invention, iron core and back core are clamped by the elasticity pressing piece before it, contact with binding post behind the ground connection conducting terminal pressurized that forms on the pressing piece, and binding post reach outside the slider.This layout makes welding operation to carry out in the small space of slider, causes that because of welding condition changes the magnetic head quality descends thereby improved the condition of welding operation and prevented.
Make it to contact with binding post by the ground connection conducting terminal is exerted pressure, can design the hole dimension that supplies ground connection conducting terminal and binding post to pass less, this layout have been saved the space on the printed-wiring board (PWB).
Make it to contact with binding post and both are reached outside the slider by the ground connection conducting terminal is exerted pressure, and the ground connection conducting terminal is soldered directly on the grounding circuit, this layout can make the static that produces in magnetic head to external discharge.
The ground connection conducting terminal reaches outside the slider.Welding operation is to carry out in the space of an opening, and institute is so that welding operation.Can not consider the position of binding post and the ground connection conducting terminal is set arbitrarily, can guarantee to have more flexibility in the design like this.
Can constitute the ground connection conducting terminal by curving inwardly as pressing piece part of the whole unshakable in one's determination before the clamping and back core towards clamping part and back board part.So just no longer need earth lead, thereby reduced number of components, and improved production efficiency.
Claims (5)
1. magnetic head, comprise the preceding iron core that forms magnetic gap, with the described preceding back core that contacts unshakable in one's determination, be contained in the coil former on the described preceding iron core, be contained in the binding post on the described coil former, elastomeric element with electric conductivity, it makes described preceding iron core become contact condition with back core with the pressure of stipulating and is clamped, and cover the slider of described back core at least, wherein, ground connection conducting terminal and elastomeric element form one, when preceding iron core and back core are clamped by elastomeric element, the ground connection conducting terminal is outstanding to the direction of regulation, so that contact with binding post on being set in coil former with the pressure of regulation, outwards gives prominence to from slider with the contacted binding post of ground connection conducting terminal.
2. magnetic head according to claim 1, wherein outwards outstanding from slider with the contacted ground connection conducting terminal of described binding post.
3. magnetic head according to claim 1 and 2, wherein elastomeric element is made by metal material, and it comprises back board part and the clamping part that constitutes clamping element, and iron core and back core before this two parts clamping also comprise crooked ground connection conducting terminal.
4. magnetic head, comprise the preceding iron core that forms magnetic gap, with described preceding contacted back core unshakable in one's determination, elastomeric element with electric conductivity, it makes described preceding iron core and back core become the slider that back core was also clamped and covered at least to contact condition with the pressure of regulation, wherein ground connection conducting terminal and elastomeric element form one, and the ground connection conducting terminal is outwards outstanding from slider.
5. magnetic head according to claim 4, wherein elastomeric element is made by metal material, and it comprises back board part and the clamping part that constitutes clamping element, and iron core and back core before this two parts clamping also comprise crooked ground connection conducting terminal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP329918/95 | 1995-11-24 | ||
| JP32991895A JP3298774B2 (en) | 1995-11-24 | 1995-11-24 | Magnetic head |
| JP329918/1995 | 1995-11-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1153968A CN1153968A (en) | 1997-07-09 |
| CN1069143C true CN1069143C (en) | 2001-08-01 |
Family
ID=18226729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96120828A Expired - Fee Related CN1069143C (en) | 1995-11-24 | 1996-11-25 | Magnetic head |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3298774B2 (en) |
| CN (1) | CN1069143C (en) |
| MY (1) | MY116687A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4152742A (en) * | 1977-10-31 | 1979-05-01 | Nortronics Company, Inc. | Back bar retainer for magnetic head |
| JPH04170710A (en) * | 1990-11-02 | 1992-06-18 | Nec Gumma Ltd | Magnetic head for floppy disk device |
| JPH05109014A (en) * | 1991-10-18 | 1993-04-30 | Sony Corp | Magnetic head |
-
1995
- 1995-11-24 JP JP32991895A patent/JP3298774B2/en not_active Expired - Fee Related
-
1996
- 1996-11-19 MY MYPI9604787 patent/MY116687A/en unknown
- 1996-11-25 CN CN96120828A patent/CN1069143C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4152742A (en) * | 1977-10-31 | 1979-05-01 | Nortronics Company, Inc. | Back bar retainer for magnetic head |
| JPH04170710A (en) * | 1990-11-02 | 1992-06-18 | Nec Gumma Ltd | Magnetic head for floppy disk device |
| JPH05109014A (en) * | 1991-10-18 | 1993-04-30 | Sony Corp | Magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3298774B2 (en) | 2002-07-08 |
| CN1153968A (en) | 1997-07-09 |
| MY116687A (en) | 2004-03-31 |
| JPH09147339A (en) | 1997-06-06 |
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