JP2013131269A - Fitting structure for bracket and flexible printed wiring board assembly body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure for bracket and a flexible printed wiring board assembly body such that a flexible printed wiring board of a head stack assembly can be securely held and easily fitted, and manufacturing processes and manufacturing costs can be reduced.SOLUTION: A bracket 24 holding an end of a flexible printed wiring board 20 extending from a head stack assembly 4 includes a bracket bottom part 22 fixed to a housing bottom surface 16a and a wiring board fitting part 23 orthogonal to the housing bottom surface 16a, and while one of the housing bottom surface and bracket bottom part is provided with at least a pair of lock parts 25 formed extending from those regions in one body, the other of the housing bottom surface and bracket bottom part is provided with an engagement part 22a which is engaged with lock parts. While the end of the flexible printed wiring board is held at the wiring board fitting part, the bracket is held upright at the housing bottom part.

Description

  The present invention relates to a bracket mounting structure. More specifically, the present invention relates to a bracket mounting structure for holding an end portion of a flexible printed wiring board extending from a head stack assembly of a magnetic recording apparatus such as a hard disk and a flexible printed wiring board assembly.

  For example, in a magnetic disk device such as a hard disk drive, a head stack assembly is used to write and read data recorded on the magnetic disk.

  A terminal of the flexible printed wiring board on the suspension side that constitutes the head stack assembly and a terminal of the main printed wiring board on the actuator assembly side are connected to each other on the side of the carriage held so as to be swingable. Further, in order to input / output data to be read / written to / from the head stack assembly, a flexible printed wiring board is extended from the side of the carriage, and the end of the flexible printed wiring board is connected to each member. It is held by a bracket standing on the bottom of the housing to be accommodated. The flexible printed wiring board is flexible so as not to prevent the carriage from swinging, and the flexible printed wiring board is interposed between the bracket and the bracket so as to absorb the carriage swing. The slack that can be deformed with the swing is set.

  At the end of the flexible printed wiring board held by the bracket, a connector is provided for connection with a control circuit provided inside or outside the case, or provided at an appropriate part of the case. Another wiring board connected to the connector is connected.

Utility Model Registration No. 2533270

  Conventionally, the bracket has been attached to the bottom surface of the housing with screws. On the other hand, the space in the housing has become narrow due to the downsizing of the equipment, and the workability of attaching the bracket with screws is troublesome and the workability of attachment is poor.

  In many cases, an opening is provided below the bracket in the housing, and a connector connected to the flexible printed wiring board is extended from the opening. In this case, in order to maintain the airtightness of the housing, it is necessary to configure the opening so that the opening can be sealed by the bracket, and the mounting accuracy of the bracket is often required.

  The invention of the present application solves the above-described conventional problems, can securely hold the end of the flexible printed wiring board extending from the carriage side of the head stack assembly, and can be easily attached, reducing the manufacturing process and manufacturing cost. It is an object to provide a bracket mounting structure that can be reduced.

  The invention described in claim 1 of the present application is a mounting structure of a bracket for holding an end portion of a flexible printed wiring board extending from a head stack assembly rotatably provided in a housing of a magnetic recording apparatus. The bracket includes a bracket bottom portion fixed to the bottom surface of the housing and a wiring board mounting portion orthogonal to the bottom surface of the housing, and extends integrally from one of the bottom surface of the housing and the bottom portion of the bracket. While providing at least one pair of latching portions formed, an engaging portion that is engaged with the latching portion is provided on the other of the bottom surface of the casing and the bottom of the bracket, and the end of the flexible printed wiring board is connected to the end of the flexible printed wiring board. The bracket is configured to be held upright on the bottom of the casing while being held on the wiring board mounting portion.

  In the present invention, the bracket for holding the flexible printed wiring board extending from the head stack assembly is erected on the bottom of the casing by the engagement of the latching portion and the engaging portion. The engagement between the latching portion and the engagement portion may be due to an elastic force or may utilize plastic deformation of a member.

  With the above configuration, the bracket can be provided without using screw means. For this reason, not only the workability of assembling the bracket is improved, but also the number of manufacturing steps can be reduced. Further, since the space for providing the screw hole is not required, the space necessary for providing the bracket can be reduced, and the apparatus can be reduced in size.

  The hooking portion and the engaging portion can be provided on either side of the bottom surface of the housing or the bottom portion of the bracket. For example, the latching portion can be extended and formed on the bottom surface side of the housing, while the engagement portion that engages with the latching portion can be provided on the bracket bottom side. In addition, the latching portion may be extended and formed on the bottom side of the bracket, while an engaging portion that can engage the latching portion may be provided on the bottom surface side of the housing.

  There is no particular limitation on the form of engagement between the latching portion and the engaging portion. For example, it is possible to employ a structure in which the hooking portion and the engaging portion are constituted by claw portions that are fitted to each other. Moreover, while providing a nail | claw part as a latching | locking part, the recessed part which the said nail | claw part can engage as said engaging part is employable. The hook portion is formed with an arm portion that can be elastically deformed and a claw portion provided at the tip of the arm portion, and the engagement state between the claw portion and the recess is maintained by the elastic force of the arm portion. It can also be configured to be able to. Further, when a sheet metal casing is employed, it is possible to employ a technique of engaging the engaging portion by plastically deforming the tip of the latching portion when the bracket is mounted.

  The method for holding the end portion of the flexible printed wiring board on the wiring board mounting part is not particularly limited. For example, the edge part of a flexible printed wiring board can be hold | maintained using an adhesive agent. Further, hook-shaped hooking means for hooking the flexible printed wiring board can be provided.

  There are no particular limitations on the material or manufacturing method of the casing. For example, as in the invention described in claim 5, the housing is formed from an aluminum casting or a sheet metal, and the hooking portion or the engaging portion provided on the bottom surface of the housing is integrally formed with the housing. can do. For example, the case made of aluminum alloy formed by aluminum die casting can be employed. Moreover, the said housing | casing can be formed by bending a stainless steel plate. By integrally forming the latching portion and the engaging portion in the casing, the latching portion or the engaging portion can be formed simultaneously in the manufacturing process of the casing, thereby increasing the manufacturing process. The latching portion and the engaging portion can be formed without any problem.

  The bracket is provided for the purpose of holding the extended portion of the flexible printed wiring board extending from the side surface of the carriage that is swung by the voice coil motor so as not to hinder the movement of the carriage. A circuit provided on the flexible printed wiring board is connected to a control circuit or the like provided inside or outside the casing. The method of connecting the flexible printed wiring board held by the bracket and the control circuit or the like is not limited.

  For example, the end of the flexible printed wiring board can be connected to a connector or the like provided on the side wall or the like of the housing via another wiring board or the like.

  Further, as in the invention described in claim 2, an opening is provided on the bottom surface of the housing corresponding to the mounting portion of the bracket, and the connector connected to the flexible printed wiring board is extended from the opening. The opening can be sealed by the bottom of the bracket.

  If the said structure is employ | adopted, it will become possible to hold | maintain a connector via the attachment structure of a bracket, and it can reduce the assembly processes, such as a connector.

  Further, since the opening can be sealed using the bracket, it is possible to prevent dust and the like from entering the housing.

  The invention described in claim 5 relates to a flexible printed wiring board assembly in which a bracket used in the bracket mounting structure described in claims 1 to 5 is connected to an end.

  By attaching the bracket to the flexible printed wiring board in advance, the mounting process of the flexible printed wiring board and the bracket can be easily performed.

  The end portion of the flexible printed wiring board extending from the head stack assembly such as a magnetic recording apparatus can be securely held, can be easily attached, and the manufacturing process and manufacturing cost can be reduced.

It is a top view which shows an example of the hard disk drive to which the attachment structure of the bracket concerning this invention is applied. It is a top view of the attachment structure of the bracket shown in FIG. It is sectional drawing which follows the III-III line in FIG. It is sectional drawing which follows the IV-IV line in FIG. It is a disassembled perspective view which shows the attachment structure of the bracket which concerns on this invention. It is a figure which shows 2nd Embodiment and is sectional drawing equivalent to FIG. It is a figure which shows 3rd Embodiment and is sectional drawing equivalent to FIG.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is an overall plan view of a hard disk device 1 in which a bracket mounting structure according to the present invention is employed. The hard disk device 1 includes a housing 2 and a plurality of magnetic disks 3 on which information is recorded and rotatably supported by a motor, and a head stack assembly 4. The head stack assembly 4 is provided with a head core (not shown) that reads / writes information from / to the magnetic disk 3 at the tip, and is held swingably so that the head core can swing on the surface of the magnetic disk. ing.

  The head stack assembly includes a carriage 7 that is swingably supported around a shaft 13 by a voice coil motor 6 provided at a base end portion, and a suspension 9 provided on an arm portion 8 of the carriage 7. The head core is held by a magnetic head portion 10 provided at the tip of the suspension 9.

  The head core is connected to a sunpension flexible printed wiring board (not shown) provided along the suspension 9, and information is exchanged via the connection wiring. The flexible printed wiring board for suspension extends from the central portion of the suspension 9 toward the swing center of the arm portion 8, and is pulled out to the side portion of the carriage 7 at the intermediate portion of the arm portion 8. The base end portion of the suspension printed wiring board is connected to the main printed wiring board 20 fixed to the side portion of the carriage.

  The main printed wiring board 20 according to the present embodiment is composed of a flexible printed wiring board as a whole, and can be bent from the fixed portion 19 fixed to the side portion of the carriage 7 and the fixed portion 19. And an extended extension part 21. The fixing portion 19 and the extending portion 21 can be formed of a flexible printed wiring board that is integrally formed, or can be formed by connecting two or more flexible printed wiring boards that constitute these portions.

  The carriage 7 is swung by the voice coil motor 6. The extending portion 21 needs to be held so as not to hinder the swinging. For this reason, the extending portion 21 is set with a slack that can absorb the swing, and the distal end portion 21 a is held by the bracket 24.

  As shown in FIG. 4, a connector connecting portion 21 b to which a connector 26 is connected is formed on the side portion of the distal end portion 21 a of the extending portion 21.

  The bracket 24 according to the present embodiment is formed in a substantially L-shaped cross section including a bracket bottom portion 22 fixed to the housing bottom surface 16a and a wiring board mounting portion 23 orthogonal to the housing bottom surface 16a. . And the front-end | tip part 21a of the said extension part 21 is being fixed to the said wiring board attachment part 23 via the adhesive agent.

  As shown in FIGS. 3 and 4, the housing bottom 16 is provided with an opening 17 through which the connector 26 extends. The opening 17 is set to a size that can be sealed by the bracket bottom 22.

  Further, on both sides of the opening 17, latching portions 25, 25 extending from the housing bottom surface 16a are integrally formed. The hook portion 25 is formed to have a length corresponding to the thickness of the bracket bottom portion 22, and a claw portion 25 a that can be engaged with the upper edge portion 22 a of the bracket bottom portion 22 is integrally formed at the tip portion. .

  When the bracket bottom portion 22 is inserted between the hook portions 25 and 25 to the housing bottom surface 16 a so as to elastically deform the hook portions 25 and 25, the claw portion 25 a is attached to the bracket bottom portion 22. The upper edge 22a is engaged. Thereby, the bracket 24 is attached to the predetermined position on the bottom surface 16a of the housing with the wiring board attaching portion 23 standing.

  The connector connecting portion 21b is bent along the bottom surface of the bracket bottom portion 22, and the connector 26 is extended from the opening portion 17, so that a connector or the like (not shown) is connected.

  As shown in FIGS. 3, 4, and 5, in the present embodiment, a recess 18 is formed on the inner edge of the opening 17. A rectangular frame-shaped elastic sealing member 19 is configured to be sandwiched between the lower surface of the connector connecting portion 21 b and the bottom surface of the concave portion in the concave portion 18. By providing the sealing member 19, the opening 17 can be reliably sealed, and dust can be prevented from entering the inside of the housing 2.

  As shown in FIG. 5, in the bracket mounting structure having the above-described configuration, the bracket bottom portion 22 with the connector connecting portion 21b attached to the lower surface is simply pressed and inserted between the latch portions 25, 25. The claw portions 25a and 25a provided at the distal end portions of the stop portions 25 and 25 can engage with the upper edge portion of the bracket bottom portion 22 to fix the bracket 24 to the housing bottom surface 16a. For this reason, a manufacturing process can be reduced compared with the attachment structure by the conventional screw means.

  And since the said latching | locking parts 25 and 25 and the bracket 24 can be formed simultaneously with manufacture of a bracket with the manufacturing method similar to the past, a manufacturing process does not increase. For this reason, it is possible to reduce the manufacturing cost and to reduce the size of the apparatus. In the present embodiment, the upper edge portion 22a of the bracket bottom portion 22 is an engaging portion with which the latching portions 25, 25 are engaged. However, the claw portions 25a, 25a are engaged with the bracket bottom portion 22. It is also possible to provide a concave portion that can be used as the engaging portion.

  FIG. 6 shows a second embodiment of the present invention.

  Similar to the first embodiment, the bracket 224 according to the present embodiment has a substantially L-shaped cross section including a bracket bottom 222 fixed to the housing bottom 216a and a wiring board mounting portion 223 orthogonal to the housing bottom 216a. It is formed in a shape. And the front-end | tip part 21a of the said extension part 21 is being fixed to the said wiring board attachment part 323 via the adhesive agent similarly to 1st Embodiment.

  In the second embodiment, an opening 217 is provided on the bottom surface 216a of the housing, while a hooking portion 225 provided with a claw 225a that engages with an edge 216b of the opening 217 on the bracket bottom 222. Are integrally extended.

  Further, an elastic seal member 219 is interposed between the bracket bottom 222 and the upper edge of the opening 217, and elastic between the bracket bottom 222 and the upper edge of the opening 217. By being pinched, the dust is prevented from entering the housing.

  Also in the second embodiment, the latching portion 225 formed on the bracket bottom portion 222 is inserted into the opening portion 217 formed on the housing bottom portion 216, and the tip claw portion 225a is inserted into the outer edge portion of the opening portion. The bracket 224 can be fixed to the housing inner surface 216a simply by engaging with. Moreover, since the said latching | locking part 225 is integrally formed with the bracket, a manufacturing process does not increase. For this reason, the effect similar to 1st Embodiment can be exhibited.

  FIG. 7 shows a third embodiment of the present invention.

  Also in this embodiment, the bracket 324 has a cross-sectional view that includes a bracket bottom portion 322 fixed to the housing bottom surface 316a and a wiring board mounting portion 323 orthogonal to the housing bottom surface 316a, as in the first embodiment. It is formed in an L shape. And the front-end | tip part 21a of the said extension part 21 is being fixed to the said wiring board attachment part 323 via the adhesive agent similarly to 1st Embodiment. In this embodiment, a flexible printed wiring board 321 extending from a connector or the like (not shown) provided on a side portion of the housing is connected to the end of the extending portion 21 held by the wiring board mounting portion 323. ing.

  In the third embodiment, the casing is made of stainless steel sheet metal. In addition, latching portions 325 and 325 that are bent toward the inside of the housing are integrally formed in the opening 317 provided in the housing bottom 316. Claw portions 325a and 325a are integrally formed at the distal end portion of the latching portion 325.

  On the other hand, engagement concave portions 322a and 322a with which the claw portions 325a and 325a are engaged are formed on the side surfaces of the bracket bottom portion 322.

  Also in the third embodiment, the bracket is fixed to the housing inner surface 316a only by engaging the latching portion 325 formed on the housing bottom 316 with the engagement recesses 322a and 322a formed on the bracket bottom 322. be able to. Moreover, since the said latching | locking part 325 is integrally formed with the housing | casing, a manufacturing process does not increase. For this reason, the effect similar to 1st Embodiment can be exhibited. In the present embodiment, the opening 317 is provided with a sealing member 330 to prevent dust from entering the housing from the opening 317.

  In the embodiment described above, a bracket having a substantially L-shaped cross section is employed, but the form of the bracket is not limited. Moreover, although the edge part of the extension part of a flexible printed wiring board was hold | maintained at the wiring board attaching part of the bracket using the adhesive agent, it can also hold | maintain using another method. For example, hook-shaped attachment means that can hook the end of the extension portion 21 can be integrally formed with the wiring board attachment portion.

  The present invention is not limited to the above-described embodiments. The embodiments disclosed herein are illustrative in all respects and should not be construed as being restrictive. The scope of the present invention is defined not by the above-described meaning but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  A bracket that holds the end of a flexible printed wiring board that extends from a rotatable head stack assembly can be easily installed in the case of the magnetic recording device, and the manufacturing process and manufacturing cost are reduced. Can be made.

1 Hard disk device (magnetic recording device)
2 Housing 4 Head stack assembly 16a Housing bottom surface 21 Extension part (flexible printed wiring board)
22 Bracket bottom 22a Edge (engagement part)
23 Wiring board mounting part 24 Bracket 25 Latching part

Claims (6)

A mounting structure of a bracket for holding an end portion of a flexible printed wiring board extending from a head stack assembly rotatably provided in a housing of a magnetic recording device,
The bracket includes a bracket bottom portion fixed to the bottom surface of the housing, and a wiring board mounting portion orthogonal to the bottom surface of the housing,
While providing at least one pair of latching portions integrally formed from one of these parts on one of the bottom surface of the housing and the bottom of the bracket,
On the other of the bottom surface of the housing and the bottom of the bracket, an engaging portion that is engaged with the latching portion is provided,
A bracket mounting structure in which the bracket is held upright on the bottom of the housing in a state where the end of the flexible printed wiring board is held by the wiring board mounting portion. An opening is provided on the bottom surface of the housing corresponding to the mounting part of the bracket,
The bracket mounting structure according to claim 1, wherein a connector connected to the flexible printed wiring board is extended from the opening, and the opening is sealed by a bottom of the bracket. While providing the hook portion on the bottom of the bracket,
The bracket mounting structure according to claim 2, wherein the bracket is configured such that a front end of the latching portion is latched to an edge of the opening.   4. The seal member according to claim 2, wherein a seal member elastically sandwiched between these members is interposed between the bracket bottom and the edge of the opening. 5. Bracket mounting structure. The housing is formed from aluminum casting or sheet metal,
The bracket mounting structure according to any one of claims 1 to 4, wherein the hooking portion or the engaging portion provided on the bottom surface of the housing is integrally formed with the housing.   The flexible printed wiring board assembly body by which the bracket used for the bracket attachment structure of Claims 1-5 was connected to the edge part.

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