Magnetic head assembly having a slotted body portion of elastic material for clamping a transducer and method of manufacture therefor
阅读：219发布：2024-01-14
专利汇可以提供Magnetic head assembly having a slotted body portion of elastic material for clamping a transducer and method of manufacture therefor专利检索，专利查询，专利分析的服务。并且A magnetic head assembly and the method of manufacture therefor is disclosed which includes a housing having long and short body portions and a magnetic transducer comprising first and second core portions that are clamped in the respective body portions. The body portions are made of a nonmagnetic elastic material and include core-gripping surfaces defined by aligned slots cut through respective mating surfaces of the body portions. Prior to assembly, the body portions are permanently deformed by applying forces that exceed the elastic limit of the body material whereby the core-gripping surfaces are spaced apart by a distance less than the thickness of the core portions. Thereafter, the coregripping surfaces are forced apart to receive the respective core portions. When the forces are released, the core-gripping surfaces spring back to tightly clamp the core in the slots.，下面是Magnetic head assembly having a slotted body portion of elastic material for clamping a transducer and method of manufacture therefor专利的具体信息内容。
1. A magnetic haead assembly comprising: a magnetic transducer assembly including a first magnetic core and a second magnetic core, each core having a certain width; a first body member comprised of an elastic material including a first mating surface having a first slot therein, opposed surfaces of said first slot defining first core-gripping surfaces that are normally spaced-apart less than said certain width, said first core being disposed within said first slot when external forces are applied to said first body member to elastically open said first slot to a width more than said certain width, said first slot thereafter being permitted to elastically close so that said first core-gripping surfaces clampingly engage said first core; a second body member comprised of an elastic material including a second mating surface having a second slot therein, opposed surfaces of said second slot defining second core-gripping surfaces that are normally spaced-apart less than said certain width, said second core being disposed within said second slot when external forces are applied to said second body member to elastically open said second slot to a width more than said certain width, said second slot thereafter being permitted to elastically close so that said second core-gripping surfaces clampingly engage said second core; and means for securing said first and said second body members together with said first and second mating surfaces in abutting relationship and with said first and second cores aligned to define a magnetic transducing gap.
2. A magnetic head assembly as recited in claim 1 and further comprising an erase core assembly mounted on said first magnetic core to define erase gaps on each side of said first core and substantially normal to said transducing gap for developing erase tracks on each side of the recording track developed by said transducing gap.
3. A magnetic head assembly as recited in claim 1 wherein the surface portions of said first and second body members proximate said transducing gap protrude outwardly to define a raised recording-media-contacting surface.
4. A magnetic head assembly as recited in claim 3 wherein said raised surface is spherically shaped and said transducing gap is located at its apex.
5. A magnetic head assembly as recited in claim 1 wherein each of said first and said second body members is elongated and generally C-shaped in cross section, said first body member having a first flange portion and a second flange portion interconnected by a first base portion, the region in the middle of said first flange portion having said first slot therein and the region in the middle of said second flange portion having a third slot therein, said Second body member having a third flange portion and a fourth flange portion interconnected by a second base portion, the region in the middle of said third flange portion having said second slot therein, and the region in the middle of said fourth flange portion having said fourth slot therein, said third and fourth slots being aligned with each other.
6. A magnetic head assembly as recited in claim 2 wherein said magnetic transducer assembly includes a read/write coil having conductive leads, and said erase core assembly includes an erase coil having conductive leads, and further including terminal strips secured to a portion of the outer surface of said first and said second body members for receiving said conductive leads of said read/write and erase coils.
7. A magnetic head assembly as recited in claim 1 wherein said first core-gripping surfaces are interconnected by a curved surface defining the perimeter of a stress reducing relief hole.
8. A magnetic head assembly as recited in claim 1 wherein each said body member comprises a plurality of spaced-apart slots in said mating surface, and further comprising a plurality of magnetic transducer assemblies respectively clampingly secured within each said slot, to provide a multi-channel magnetic head assembly.
9. A method for fabricating a magnetic head assembly comprising the steps of: permanently deforming a first deformable body member that is comprised of an elastic material and that has a slot defined by spaced-apart facing core-gripping surfaces so as to move said core-gripping surfaces toward one another; applying spreading forces within the elastic limits of said elastic material to said body member to spread said core-gripping surfaces apart a distance sufficient for said slot to receive a first magnetic core portion; inserting said first core portion into said slot between said core-gripping surfaces; and releasing said spreading forces, whereby said core-gripping surfaces spring against said core portion to clamp said core portion to said body member.
10. A method for fabricating a magnetic head assembly as recited in claim 9 wherein said body member comprises an elongated member that is C-shaped in cross section and wherein the step of permanently deforming said deformable body member is preceded by the step of positioning said body member in a fixture that has three spaced-apart force members such that the middle force member is directed toward the inner surface of the base of said body member between and in a direction substantially parallel to said core-gripping surfaces.
11. A method for fabricating a magnetic head assembly as recited in claim 10 wherein the step of applying spreading forces to said body member is preceded by the step of repositioning said deformed body member in said fixture with said middle force member directed toward the outer surface of the base of said body member in a direction substantially parallel to said core-gripping surfaces.
12. A method for fabricating a magnetic head assembly as recited in claim 9 and repeating the same sequence of steps with a second deformable body member and a second core portion, followed by the step of mating said second core portion with said first core portion to provide a magnetic transducer and then securing said first and said second body members together to form the magnetic head assembly.
13. A method for fabricating a magnetic head assembly as recited in claim 9 wherein said deformable body member includes at least two sets of spaced-apart core-gripping surfaces and wherein a magnetic core is inserted between each set of said core-gripping surfaces so as to provide a multi-channel magnetic head assembly.
14. A method for fabricating a magnetic head assembly as recited in claim 10 including prior to the step of positioning said body member in a fixture, the step of cutting a transverse slot into one side of said body member, the opposed surfaces of said slot defining said core-gripping surfaces.
15. A method for fabricating a magnetic head assembly comprising the steps of: forming a first elongated body member, that is comprised of an elastic material, into an elongated channel that includes a base and a pair of outwardly extending flanges, the distal ends of said flanges defining first mating surfaces; slotting the mating surface of one of said flanges of said first body member so as to define first opposed core-gripping surfaces; permanently deforming said first body member so as to move said first core-gripping surfaces toward one another to define a first controlled gap; spreading said first core-gripping surfaces with force members to open said first gap sufficient to receive a first magnetic core portion; inserting said first magnetic core portion in said first gap; removing said force members whereby said first core-gripping surfaces spring against and clampingly secure said first core portion within said first body member so as to provide a first unit; forming a second elongated body member, that is comprised of an elastic material, into an elongaged channel that includes a base and a pair of outwardly extending flanges, the distal ends of said flanges defining second mating surfaces; slotting the mating surface of one of said flanges of said second body member so as to define second opposed core-gripping surfaces; permanently deforming said second body member so as to move said second core-gripping surfaces toward one another to define a second controlled gap; spreading said second core-gripping surfaces with force members to open said second gap sufficient to receive a second magnetic core portion; inserting said second magnetic core portion in said second gap; removing said force members whereby said second core-gripping surfaces spring against and clampingly secure said second core portion within said second body member so as to provide a second unit; and fastening said first and second units into a magentic head assembly.
16. A method for fabricating a magnetic head assembly as recited in claim 15 wherein the step of fastening said first and second units includes the step of loosely securing said first and second mating surfaces together with said first and second core portions aligned so as to provide a magnetic transducer, and then followed by the step of tightly securing said units together.
17. A method for fabricating a magnetic head assembly as recited in claim 15 including, prior to the step fastening said first and second units into a magnetic head assembly, the step of lapping tranducing surfaces on said flanges of said first and second body members proximate said first and second cores to define a preselected throat height in said first and said second cores.
18. A method for fabricating a magnetic head assembly as recited in claim 15 wherein said core-gripping surfaces of said first and said second body members are comprised of nonmagnetic stainless steel.
19. A method for fabricating a magnetic head assembly as recited in claim 15 including the step of positioning as erase core assembly on said first core portion and the step of forming a recess in said first body member for receiving said erase core assembly.
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