JP4105619B2 - Head suspension arm assembly and manufacturing method thereof - Google Patents

Description

  The present invention relates to a head suspension arm assembly that supports a head slider that is incorporated in an information processing apparatus such as a personal computer and that reads and writes information, and a manufacturing method thereof.

  Examples of conventional head suspension assemblies include those shown in FIGS. FIG. 27 is a plan view of the main part of the magnetic disk apparatus with the head suspension arm assembly 101 assembled, and FIG. 28 is an exploded perspective view of the head suspension arm assembly 101.

  As shown in FIG. 27, the head suspension arm assembly 101 is supported by the shaft portion 103 of the carriage. The head suspension arm assembly 101 is obtained by coupling a suspension 105 to an arm 104.

  The arm 104 includes a rotary bearing 107 and a movable coil 109 on the proximal end side, and a coupling hole 110 on the distal end.

  The suspension 105 includes a head slider 111 capable of reading and writing information at the tip, and a base plate 113 is fixed to the base end by laser welding or the like. The base plate 113 is provided with a boss portion 115.

  In the suspension 105, the boss 115 is fitted into the coupling hole 110 on the arm 103 side, and a ball (steel ball) is passed through the inner periphery of the boss 115, so that the boss 115 is caulked and coupled to the coupling hole 110. (Ball tightening).

  With the head suspension arm assembly 101 assembled on the magnetic disk device side, the movable coil 109 and the external fixed magnetic circuit 119 on the magnetic disk device side constitute a voice coil motor. The head suspension arm assembly 101 generates a driving force by applying a predetermined driving current to the movable coil 109 by the voice coil motor. With this driving force, the head suspension arm assembly 101 rotates in the traveling direction (the radial direction of the disk). By this rotation, the head slider 111 moves to the target track on the disk and is positioned.

  However, the head suspension arm assembly 101 requires the base plate 113 for coupling the suspension 105 to the arm 104, and there is a limit to weight reduction. On the other hand, in this type of apparatus, it is desired to reduce the weight as much as possible in order to improve vibration characteristics and impact performance.

  Further, as described above, when the boss 115 of the suspension 105 is caulked and coupled to the arm 103, the base plate 113 may be deformed by caulking. When the base plate 113 is deformed, the suspension 105 is twisted and fixed to the arm 103. When the suspension 105 is fixed as described above, the support state of the head slider 111 is inclined. As a result, the flying height with respect to the disk varies, and reading / writing with respect to the disk may be inaccurate.

  On the other hand, in the head suspension arm assembly 101A shown in an exploded plan view in FIG. 29, the base end portion of the suspension 105A is fixed to the distal end portion of the arm 104A by spot welding, an adhesive, or the like.

  Since the head suspension arm assembly 101A does not use a base plate, the weight can be reduced, and there is no deformation of the base plate due to ball caulking on the arm.

  However, the bond has a weaker bond strength than the caulking, and is easily peeled off with the lapse of time, resulting in a difficulty in durability. Further, in laser welding, it is necessary to form not only the suspension 105A but also the arm 104A from stainless steel, and light metals such as aluminum and titanium cannot be used. The arm 104A has a relatively thick plate thickness to ensure the support strength, and if it is made of stainless steel, there is a risk that the arm head suspension assembly 101A as a whole may be reduced in weight.

  When the head slider 111 is damaged, so-called rework is performed in which the suspensions 105 and 105A are removed from the arms 104 and 104A and the head slider 111 is replaced. However, reworking is difficult or extremely difficult by fixing by caulking or laser welding as described above.

  In the conventional manufacturing method in which the head slider is assembled in advance to the suspensions 105 and 105A and the suspensions 105 and 105A are coupled to the arms 104 and 104A, the head slider 111 may be damaged if the countermeasure against static electricity is not sufficient. For this reason, enormous time and meticulous attention are required for countermeasures against static electricity of the suspensions 105, 105A and the like.

JP 2001-195845 A Japanese Patent No. 32229999

  The problem to be solved is that there is a limit to weight reduction when caulking, it tends to cause deformation, there is a problem with durability when it is bonded, and there are difficulties in reworking with caulking and welding . In addition, in the manufacturing method in which the head slider is attached first, there is a risk that an enormous amount of time may be taken for countermeasures against static electricity.

The head suspension arm assembly of the present invention is characterized in that a through hole is provided in each of the arm and the suspension, and the suspension is coupled to the arm by a coupling resin portion provided across each hole .

The suspension hole is provided with a protruding piece portion that is inserted into the binding resin portion.
A chamfered portion that engages the binding resin portion is formed in the opening of the hole of the arm.

  A rigid body portion and a spring portion of the suspension are formed separately, the rigid body portion is coupled to one end side of the spring portion, and a reinforcing plate is coupled to the other end side of the spring portion. To do.

The method of manufacturing a head suspension arm assembly according to the present invention includes a step of forming a hole penetrating the arm, a step of forming a hole penetrating the suspension, and before attaching the head slider to the suspension. The suspension is bonded to and supported by the arm by molding resin over each hole, and the resin molding over each hole is performed by molding a fixed resin portion that fixes the movable coil to the arm. It is characterized by being performed together .
Also, a head suspension arm comprising: an arm that has a movable coil for driving and is attached to a carriage; and a suspension that includes a rigid body portion and a spring portion and is attached to and supported by the arm and attaches a head slider capable of reading and writing information on the tip portion. An assembly comprising a step of providing a hole penetrating the arm, a step of forming a hole penetrating the suspension , and the suspension before attaching the head slider to the suspension. And bonding and supporting to the arm by molding resin over the holes .

  In the head suspension arm assembly of the present invention, since the suspension is coupled to the arm by the coupling resin portion by molding, the conventional base plate can be eliminated, and the weight can be further reduced. This weight reduction can improve the vibration characteristics and impact characteristics of the suspension.

  Deformation due to the ball caulking can be prevented, and the suspension can be accurately attached to the arm. This accurate attachment can improve the vibration characteristics of the suspension and the flying characteristics of the head slider.

  Compared with adhesion, sufficient reliability and strength of bonding can be obtained, and durability can be improved.

  Since the bonding is not performed by laser welding but by a bonding resin portion, the material of the arm can be freely selected, and light metals such as aluminum and titanium can also be used. For this reason, the weight can be further reduced as compared with laser welding in which stainless steel of the same material as the suspension must be used as the material of the arm.

When reworking, it is possible to relatively easily break the bonded resin portion. For this reason, rework becomes easier compared to fixing by ball caulking or fixing by laser welding, and a damaged head slider can be easily replaced.
Since the holes penetrating the arm and the suspension are provided, and the bonding resin portion is provided across the holes, the arm and the suspension can be reliably bonded by the bonding resin portion.

  When a protrusion piece that is inserted into the coupling resin portion is provided in the suspension hole, the coupling force between the suspension and the coupling resin portion can be further increased by the engagement force of the protrusion piece portion. Due to this increase in coupling, it is possible to prevent the coupling resin portion from dropping off and relative rotation from the suspension. For this reason, the coupling | bonding of a suspension and an arm can be maintained more reliably.

  When a chamfered portion that engages the binding resin portion is formed at the opening end of the hole of the arm, the binding resin portion can be engaged with the chamfered portion. By this engagement, the coupling resin portion can be more reliably coupled to the arm. Accordingly, it is possible to form the head suspension arm so that the necessity of forming the engagement head portion for engaging the outer surface on the suspension side or the arm side with the binding resin portion and ensuring the wall thickness is suppressed. Even when there is no space between the assembly and the disk, it can be handled without difficulty.

  When the rigid body portion and the spring portion of the suspension are formed separately, and the rigid body portion is coupled to one end side of the spring portion and the reinforcing plate is coupled to the other end side of the spring portion, The material and plate thickness are not restricted by the spring part. For this reason, it is possible to select an appropriate material and plate thickness according to the requirements of the rigid body portion and the spring portion, and the performance required for the suspension can be satisfied exactly. For example, if a plate with a large plate thickness is used for the rigid part, it is possible to increase the rigidity without the need to perform bending to form bending edges or ribs, and the air resistance of the rigid part. Can be reduced. Therefore, the influence of wind turbulence during high-speed rotation of the disk is reduced, and the occurrence of suspension flutter (suspension flapping of the wind) can be suppressed.

In the method of manufacturing the head suspension arm assembly according to the present invention, the molding of the resin over each hole is performed together with the molding of the fixed resin portion that fixes the movable coil to the arm. No process is required. For this reason, manufacture of a head suspension arm assembly becomes easy.
Further, before the head slider is attached to the suspension, the suspension can be coupled and supported to the arm by resin molding. For this reason, until the head suspension arm assembly is manufactured, time and attention are not taken for countermeasures against static electricity for protecting the head slider, and workability can be improved. In addition, damage to the head slider due to static electricity can be easily suppressed.

  The purpose of the present invention is to improve vibration characteristics and impact characteristics by reducing weight, vibration characteristics by preventing deformation, flying characteristics of the head slider, improving durability, and improving rework. Realized by supporting by coupling.

  In addition, the purpose of reducing the time and attention for countermeasures against static electricity has been realized by connecting and supporting the suspension to the arm by resin molding before attaching the head slider to the suspension.

  1 and 2 relate to a head suspension arm assembly (hereinafter referred to as an “arm assembly”) according to a first embodiment of the present invention. FIG. 1 is a plan view of the arm assembly, and FIG. FIG.

  The arm assembly 1 according to this embodiment includes an arm 3 and a suspension 5. The suspension 5 has a base end portion 7 overlapped with a tip end portion 9 of the arm 3 and is coupled and supported by a coupling resin portion 11 formed by molding. The bonding resin part 11 is provided at two places in the present embodiment.

  The arm 3 is attached to a carriage, and is provided with a fitting hole 13 that is fitted and supported on a shaft on the carriage side. The arm 3 is provided with a movable coil 15. The movable coil 15 constitutes a voice coil motor together with an external fixed magnetic circuit of the carriage. The movable coil 15 is fixed to the arm 3 by a fixed resin portion 17 by molding. The binding resin portion 11 is formed together with the fixed resin portion 17 by molding. By this molding, a special process for forming the bonding resin portion 11 is not required, and the head suspension arm assembly 1 can be easily manufactured. The binding resin portion 11 and the fixed resin portion 17 are thermosetting resins, and the molding is performed at a temperature of 80 ° C. or less.

  A head slider capable of reading and writing information can be attached to the tip 19 of the suspension 5. However, in the state of FIG. 1, the head slider is not attached. The head slider is attached to the tip 19 after the arm assembly 1 of FIG. 1 in which the suspension 5 is coupled and supported by the arm 3.

  3 and 4 show the suspension 5, FIG. 3 is a plan view, and FIG. 4 is a side view.

  As shown in FIGS. 3 and 4, the suspension 5 includes a load beam 21 and a flexure 25. The load beam 21 includes a rigid part 27, a reinforcing plate 29, and a spring part 23.

  The rigid body portion 27 is formed to be thicker than the plate thickness of the spring portion 23, and is set equal to the reinforcing plate 29 in this embodiment. The rigid body portion 27 is made of, for example, stainless steel. However, the rigid body portion 27 is formed of a light metal such as aluminum or titanium, or a synthetic resin, so that both weight reduction and high rigidity can be achieved.

  The reinforcing plate 29 is formed separately from the rigid body portion 27, and is formed of stainless steel, for example, like the rigid body portion 27. However, like the rigid body portion 27, the reinforcing plate 29 can also be formed of a light metal such as aluminum or titanium, or a synthetic resin.

  The spring portion 23 is configured as a part of the spring plate 31. The spring plate 31 is made of, for example, a thin stainless steel rolled plate having spring properties, and has a lower spring constant than that of the rigid body portion 27 and a high accuracy. The base end of the rigid body portion 27 is overlapped with one end side of the spring portion 23, that is, the distal end of the spring plate 31, and is coupled by laser welding or the like. The reinforcing plate 29 is superimposed on the other end side of the spring portion 23, that is, the base end side of the spring plate 31, and is fixed by laser welding or the like.

  Accordingly, the rigid body portion 27 and the spring portion 23 of the suspension 5 are formed separately. With this configuration, it is possible to select a material and a plate thickness suitable for each of the rigid body portion 27 and the spring portion 23, and the performance required for the rigid body portion 27 (for example, high rigidity) and the performance required for the spring portion 23 (for example, Low spring constant). Moreover, the stable low spring constant can be obtained by using a highly accurate rolling material for the spring part 23. FIG.

  The reinforcing plate 29 and the spring plate 31 are provided with two holes 33 and 35 corresponding to the binding resin portion 11 respectively. In FIG. 3, the hole 35 of the reinforcing plate 29 overlaps the hole 33 of the spring plate 31 and is indicated by parentheses.

  The flexure 25 is formed by forming a conductive path on the surface of a metal substrate such as a thin stainless steel rolled plate having spring properties through an electrical insulating layer. One end of the conductive path is disposed on the tongue 37. A head slider is attached to the tongue 37 later, and the head slider is connected to the conductive path.

  5 is a plan view of the main part of the reinforcing plate 29, FIG. 6 is a side view thereof, FIG. 7 is an enlarged plan view of the main part, and FIG.

  As shown in FIGS. 5 to 8, four protrusions 39 are provided at equal intervals in each hole 35 of the reinforcing plate 29. Each projecting piece 39 is set to be inclined into the hole 35. The inclination angle of the projecting piece 39 is approximately 45 degrees in this embodiment, and is inclined toward the opposite side of the spring plate 31. The projecting piece 39 can be formed to be inclined by applying a ring-shaped jig 41 shown in FIG. 8 around the hole 35 when the reinforcing plate 29 is press-molded.

  FIG. 9 is a main part plan view showing the coupling between the arm 3 and the suspension 5, and FIG. 10 is an enlarged sectional view taken along arrow SA-SA in FIG. 9.

  As shown in FIG. 9, the bonding resin portion 11 is provided in the holes 33 and 35. As shown in FIG. 10, the arm 3 is also provided with a hole 43 at a position corresponding to the holes 33 and 35. The binding resin portion 11 is provided across the holes 33, 35, and 43. For this reason, the arm 3 and the suspension 5 can be reliably coupled by the coupling resin portion 11.

  Chamfered portions 45 and 47 are provided in the opening of the hole 43. Either one or both of the chamfered portions 45 and 47 can be omitted.

  The binding resin part 11 reaches the double-sided chamfers 45 and 47, and the binding resin part 11 is engaged with the chamfered parts 45 and 47. By this engagement, the coupling resin portion 11 is prevented from coming off from the hole 43, and the coupling resin portion 11 can be more reliably coupled to the arm 3. By this bonding, the end surfaces 49 and 51 of the bonding resin portion 11 can be formed flush with the surface of the arm 3 and the surface of the spring plate 31. Due to this flush formation, even when there is no space between the disk located on the spring plate 31 side and the head suspension arm assembly 1, it is possible to cope with it without difficulty and further miniaturization is possible.

  As shown in FIG. 10, the protruding piece portion 39 is inserted into the binding resin portion 11. In this inserted state, the engaging action between the bonding resin portion 11 and the reinforcing plate 29 can be enhanced, and the bonding strength between the reinforcing plate 29 and the bonding resin portion 11 can be increased. As a result, the binding force between the suspension 5 and the bonding resin portion 11 can be further increased, and the separation between the suspension 5 and the bonding resin portion 11 can be suppressed. Therefore, the coupling between the suspension 5 and the arm 3 can be more reliably maintained.

  The protrusion 39 can prevent the coupling resin portion 11 and the reinforcing plate 29 from rotating, and the coupling resin portion 11 can be used to couple the arm 3 and the suspension 5 only at one location. Become.

  Thus, in Example 1 of this invention, since the arm 3 and the suspension 5 are couple | bonded by the coupling | bonding resin part 11, and a baseplate can be abolished, the mass of the suspension 5 can be reduced 20 to 30%. As a result, the vibration characteristics and impact characteristics of the suspension 5 can be improved.

  Since deformation due to ball caulking is eliminated, the suspension 5 is accurately attached to the arm 3. This accurate attachment can improve the vibration characteristics of the suspension 5 and the flying characteristics of the head slider. That is, the head slider is correctly arranged with respect to the disk. As a result, the flying height of the head slider is constant, and reading / writing with respect to the disk can be performed accurately.

  The bonding resin portion 11 formed by molding can withstand a torque of 0.6 to 1.2 kgf / cm, and the strength of the bonding resin portion 11 is adjusted by the number and size of the bonding resin portions 11 as in the case of ball caulking. Is possible.

  Furthermore, unlike laser welding or the like, the arm 3 can be made of a light metal such as aluminum or titanium, and from this point, a sufficient weight reduction can be achieved.

  Compared with adhesion, sufficient reliability and strength of bonding can be obtained, and durability can be improved.

  Since the bonding is not performed by laser welding but by the bonding resin portion 11, the material of the arm 3 can be freely selected, and a light metal such as aluminum or titanium can be used. For this reason, the weight can be further reduced as compared with laser welding in which stainless steel of the same material as the suspension must be used as the material of the arm.

  At the time of rework, the bonding resin portion 11 can be relatively easily broken. For this reason, rework becomes easier compared to fixing by ball caulking or fixing by laser welding, and a damaged head slider can be easily replaced.

  Next, a method for manufacturing the head suspension arm assembly 1 will be described.

  11 to 13 show the manufacturing process of the suspension 5. 11A is a plan view of the load beam plate chain product, FIG. 11B is a plan view of the spring plate chain product, and FIG. 11C is a state in which the load beam plate chain product is overlaid and joined to the load beam plate chain product. 12A is a plan view of the flexure chain product, FIG. 12B is a plan view after the flexure cut, and FIG. 12C is a diagram of the flexure combined with the load beam plate chain product and the spring plate chain product. FIG. 13 is a plan view showing a frame cut.

  As shown in FIG. 11A, the load beam plate chain 54 of the load beam plate 52 including the rigid body portion 27 and the reinforcing plate 29 is formed on the frame 53 by, for example, punching with a press. The reinforcing plate 29 is formed with the holes 35 provided with the protruding piece portions 39 at two locations, and the frame 53 is provided with a plurality of positioning holes 55.

  As shown in FIG. 11B, the chain product 56 of the spring plates 31 is formed on the frame 57 by, for example, etching. When the spring plate chain 56 is formed, the holes 33 are formed in two places, and the frame 57 is provided with a plurality of positioning holes 59.

  The load beam spring shown in FIG. 11 (c) is obtained by fitting the positioning hole 55 of the load beam plate chain 54, the positioning hole 59 of the spring plate chain product 56, and the like to the same positioning pin, overlapping them, and laser welding. The plate connection product 61 is formed.

  On the other hand, as shown in FIG. 12A, a flexure chain product 63 having a plurality of flexures 25 is formed on the frame 65. Positioning holes 67 and 69 are also provided in the frame 65.

  The flexure chain product 63 in FIG. 12A is cut to form flexure cut products 71 each having a positioning hole 69 as shown in FIG. 12B. Each flexure cut product 71 is overlaid on the load beam spring plate coupling product 61, positioned by a positioning hole 69 or the like, and coupled by laser welding or the like to form a suspension chain product 73 of FIG.

  Next, as shown in FIG. 13, a part 75 of the frame is cut, and the remaining part 77 is further cut to form the suspension 5 as shown in FIG.

  The arm 3 is formed by press molding or the like in the step of forming another arm.

  Thereafter, before the head slider is attached to the suspension 5, the suspension 5 is coupled and supported to the arm 3 by resin molding. In this coupling support step, the fixed resin portion 17 that fixes the movable coil 15 and the coupling resin portion 11 that fixes the suspension 5 to the arm 3 are formed together.

  In this manner, the head slider is not attached until the head suspension arm assembly 1 is manufactured, and time and attention are not taken to prevent static electricity for protecting the head slider when the suspension 5 is handled, thereby improving workability. be able to. Further, it is possible to easily prevent the head slider from being damaged by static electricity.

  14 is a cross-sectional view similar to FIG. 10 according to the second embodiment of the present invention. Note that components corresponding to those in the first embodiment are described with the same reference numerals.

  In the head suspension arm assembly 1A of the present embodiment, one end surface 51A of the binding resin portion 11A protrudes from the surface of the spring plate 31 to form an engagement head portion 79. By this engagement head portion 79, the thickness t from the tip of the projecting piece portion 39 to the end surface 51A of the coupling resin portion 11A is secured, and the engagement strength is further increased by engaging with the outer surface of the spring plate 31 on the suspension 5A side. it can.

  15 and 16 relate to the third embodiment of the present invention, FIG. 15 is a cross-sectional view similar to FIG. 10, and FIG. 16 is a plan view similar to FIG. Note that components corresponding to those in the first embodiment are described with the same reference numerals.

  In the head suspension arm assembly 1B of this embodiment, the hole 35B is formed as a round hole, and no projecting piece is provided. A chamfered portion is not provided in the hole 43 </ b> B of the arm 3. End surfaces 49B and 51B of the binding resin portion 11B protrude from the surface of the spring plate 31 and the surface of the arm 3 to form engagement head portions 81 and 83. The engagement head portions 81 and 83 are formed so as to cover the periphery of the openings of the holes 33 and 43B.

  Even with such a structure, the arm 3B and the suspension 5B can be easily coupled by the coupling resin portion 11B.

  This embodiment is suitable when there is a space between the head suspension arm assembly 1B and the disk.

  In the present embodiment, no projecting piece portion is provided in the hole 35B, and no chamfered portion is provided in the hole 43B, so that manufacturing can be performed more easily.

  FIGS. 17 to 19 are sectional views of the main part according to the fourth embodiment of the present invention, in which the holes of the reinforcing plate of the first embodiment are modified. Note that components corresponding to those in the first embodiment are described with the same reference numerals.

  17-19, the inclination | tilt angle of the tongue provided in the hole 35 of the reinforcement plate 29 was changed. In FIG. 17, the inclination angle of the projecting piece portion 39 </ b> C is made gentler than that of the first embodiment, and is set to an inclination angle of about 30 degrees. 18 is bent in a direction along the axis of the hole 35 so as to be orthogonal to the reinforcing plate 29. The protruding piece 39E in FIG. 19 protrudes toward the axial center of the hole 35 without being bent.

  These projecting piece portions 39C, 39D, and 39E are also inserted into the coupling resin portion 11, and similarly, the relative rotation can be restricted and the engagement force in the pulling direction can be strengthened to achieve a strong coupling.

  20 to 22 relate to the fifth embodiment, and are respectively plan views of relevant parts in which the holes of the reinforcing plate of the first embodiment are modified. Note that components corresponding to those in the first embodiment are described with the same reference numerals.

  20 to 22, the arrangement and the number of tongues 39 provided in the holes 35 of the reinforcing plate 29 are changed. In FIG. 20, the number of the projecting piece portions 39 is four, but the arrangement direction is changed with respect to the first embodiment. In FIG. 21, the number of projecting piece portions 39 is three, and the arrangement direction is changed. In FIG. 22, the number of projecting piece portions 39 is two, and the arrangement direction thereof is changed.

  The same effects as those of the first embodiment can be obtained by the arrangement and the number of the projecting pieces 39.

FIGS. 23 to 26 relate to the sixth embodiment, FIG. 23 is a plan view of the suspension, FIG. 24 is a side view thereof, FIG. 25 is a plan view of the main part of the reinforcing plate, and FIG. The components corresponding to those of the first embodiment will be described with the same reference numerals. The suspension 5G used in the head suspension arm assembly of this embodiment has a reinforcing plate 29G and a spring plate 31G that are formed slightly longer. In addition to the first holes 33 and 35, holes 85 and 87 were added. The hole 85 is provided in the spring plate 31G, and the hole 87 is provided in the reinforcing plate 29G. The hole 87 is provided with a protruding piece part 89 similar to the protruding piece part 39 of the hole 35. The arm 3 is also provided with holes similar to the holes 43 or 43B corresponding to the holes 85 and 87.

  In this embodiment, the holes 33 and 35 and the holes 85 and 87 are connected to the hole 43 on the arm 3 side and the added hole by a bonding resin portion by similar molding.

  Therefore, in the present embodiment, the suspension 5G and the arm 3 can be coupled more firmly and stably by coupling at three points.

  Needless to say, the structures of Examples 2 to 4 can be applied to the three-point connection of Example 6.

(Example 1) which is a top view of a suspension arm assembly. (Example 1) which is a side view of a suspension arm assembly. (Example 1) which is a top view of a suspension. (Example 1) which is a side view of a suspension. (Example 1) which is a principal part top view of a reinforcement plate. (Example 1) which is a principal part side view of a reinforcement plate. It is a principal part enlarged plan view of a reinforcement plate (Example 1). It is a principal part expanded sectional view of a reinforcement plate (Example 1). (Example 1) which is a principal part top view which shows the coupling | bonding of an arm and a suspension. (Example 1) which is the SA-SA arrow expanded sectional view of FIG. (A) is a plan view of the load beam plate chain product, (b) is a plan view of the spring plate chain product, and (c) is a plan view of a state in which the spring plate chain product is overlapped with and coupled to the load beam plate chain product. (Example 1). (A) is a plan view of the flexure chain product, (b) is a plan view after the flexure cut, and (c) is a plan view in which the flexure is coupled to the combined product of the load beam plate chain product and the spring plate chain product. (Example 1). (Example 1) which is a top view which shows a frame cut. It is sectional drawing similar to FIG. 10 (Example 2). FIG. 11 is a sectional view similar to FIG. 10 (Example 3). FIG. 6 is a plan view similar to FIG. 5 (Example 3). (Example 4) which is principal part sectional drawing of a reinforcement plate. (Example 4) which is principal part sectional drawing of a reinforcement plate. (Example 4) which is principal part sectional drawing of a reinforcement plate. (Example 5) which is a principal part top view of a reinforcement plate. (Example 5) which is a principal part top view of a reinforcement plate. (Example 5) which is a principal part top view of a reinforcement plate. (Example 6) which is a top view of a suspension. (Example 6) which is a side view of a suspension. (Example 6) which is a principal part top view of a reinforcement plate. (Example 6) which is a principal part side view of a reinforcement plate. It is a principal part top view of the magnetic disc apparatus which assembled | attached the head suspension arm assembly (conventional example). It is a disassembled perspective view of a head suspension arm assembly (conventional example). FIG. 6 is an exploded plan view of a head suspension arm assembly (conventional example).

Explanation of symbols

1, 1A, 1B Head suspension arm assembly 3 Arm 5, 5A, 5B, 5G Suspension 11, 11A, 11B Bonded resin part 15 Movable coil 17 Fixed resin part 23 Spring part 27 Rigid body part 29, 29G Reinforcement plate 33 Hole 35, 35B hole 39, 39C, 39D, 39E Projection piece 43, 43B hole 45, 47 Chamfer

Claims (6)

An arm having a movable coil for driving and attached to the carriage;
A head suspension arm assembly including a rigid body portion and a spring portion, and a suspension that is coupled to the arm and supports a head slider capable of reading and writing information at a tip portion;
The arm and the suspension are each provided with a through-hole,
A head suspension arm assembly, wherein the suspension is coupled to the arm by a coupling resin portion provided across the holes . The head suspension arm assembly according to claim 1,
A head suspension arm assembly , wherein the suspension hole is provided with a projecting piece portion to be inserted into the binding resin portion . The head suspension arm assembly according to claim 1 or 2,
A head suspension arm assembly , wherein a chamfered portion that engages the binding resin portion is formed in an opening of the hole of the arm. The head suspension arm assembly according to claim 1,
Forming the rigid body portion and the spring portion of the suspension separately;
A head suspension arm assembly , wherein the rigid body portion is coupled to one end side of the spring portion, and a reinforcing plate is coupled to the other end side of the spring portion . An arm having a movable coil for driving and attached to the carriage;
A head suspension arm assembly comprising a suspension that includes a rigid body portion and a spring portion and is attached to and supported by the arm and attaches a head slider capable of reading and writing information to a tip portion ;
Forming a hole penetrating the arm; and
Forming a hole penetrating the suspension; and
A step of attaching and supporting the suspension to the arm by molding resin over the holes before attaching the head slider to the suspension;
The method of manufacturing a head suspension arm assembly, wherein the molding of the resin across the holes is performed together with molding of a fixed resin portion for fixing the movable coil to the arm . An arm having a movable coil for driving and attached to the carriage;
A head suspension arm assembly comprising a suspension that includes a rigid body portion and a spring portion and is attached to and supported by the arm and attaches a head slider capable of reading and writing information to a tip portion ;
Forming a hole penetrating the arm; and
Forming a hole penetrating the suspension; and
And a step of coupling and supporting the suspension to the arm by molding a resin over the holes before attaching the head slider to the suspension .

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