JP4903549B2 - Hard disk drive and flexible cable assembly - Google Patents

Description

  The present invention relates to hard disk drives and, more particularly, to flexible cable assemblies for hard disk drives.

  As an FCA (Flexible Cable Assembly) that appropriately holds the folded state of the flexible cable inside a hard disk drive (Hard Disk Drive; hereinafter referred to as “HDD”) which is one of the disk devices, for example, a structure shown in FIG. Has been proposed (for example, Patent Document 1).

  As shown in FIG. 11, the conventional FCA 10 includes a region A1 that is a joint portion of an HGA (Head Gimbal Assembly) and the FCA 10, a region B1 that is opposed when bent toward the region A1, and a region A1 that is approximately equal to the region A1. The region C1 is a wiring portion that is inverted by 180 °, and the region D1 extends from the inverted region C1 toward the bracket and is fixed to the hook. The preamplifier IC 12 is attached to the region B1, and chips 13a and 13b are provided in the region A1 and the region B2.

  FIG. 12 shows a state where the FCA 10 of FIG. 11 is attached to the carriage. As shown in FIG. 12, the FCA 10 is attached to the carriage so that the region A1 is bent toward the region B1 and the region B1 to which the preamplifier IC 12 is attached is opposed to the HSA (Head Stack Assembly) 30. The FCA 10 is bent about 180 ° in the region C1, and the region D1 is fixed to the resin hook 50. In FIG. 12, reference numeral 20 denotes a VCM coil, and reference numeral 40 denotes a rotation axis of the HSA 30.

JP 2005-190504 A

  However, as the size of the HDD is reduced, the size of the HSA on which the head is mounted is also reduced. Along with this, the design freedom of FPC (Flex Printed Circuit) and FCA decreases.

  In the above-described conventional FCA 10, the chip 13a is provided in the region A1 that is a joint portion between the HGSA 30 and the FCA 10, and the preamplifier IC 12 and the chip 13b are provided in the region B1. As described above, mounting the preamplifier IC 12 and the chips 13a and 13b is physically necessary for an HSA used in an HDD of 1.8 inches or less (for example, 1.3 inch type or 1.0 inch type). Is very difficult.

  For this reason, as the HDD is miniaturized, the preamplifier IC 12 and the chips 13a and 13b are mounted on the end portion of the dynamic loop (not shown) of the FCA 10 fixed to the housing of the HDD. It has become so. However, with such a structure, it is difficult to maintain the electrical performance required for the HDD. For example, since the wiring from the writing element mounted on the tip of the HGA to the element such as the preamplifier IC becomes long, it becomes impossible to reduce the inductance which is a problem in the high frequency technology, and the performance is reduced by downsizing the HDD. It becomes difficult to maintain.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is a new and improved device capable of maintaining electrical reliability and miniaturizing the apparatus. It is to provide a hard disk drive and a flexible cable assembly (FCA).

  In order to solve the above-described problems, according to an aspect of the present invention, a head that reads and writes information from and on an information recording surface of a disk, at least a pair of arms that support the head, and the arm between the pair of arms A hard disk drive is provided that includes an HSA that is configured to include a carriage supported coaxially with a rotating shaft of the HSA and that rotates the head to a predetermined position on the disk, and an FCA that is electrically connected to the head. The The FCA of the present invention has a first carriage fixing portion fixed to the carriage, and a second carriage fixing portion fixed to the carriage at a position farther from the rotation axis of the carriage than the first carriage fixing portion, An electronic element mounting portion on which an electronic element is mounted, and a bent portion that is bent so that the first carriage fixing portion and the electronic element mounting portion are opposed to each other are provided.

  According to the present invention, the FCA is fixed to the carriage at the first carriage fixing portion and the second carriage fixing portion provided in the electronic element mounting portion on which the electronic element is mounted. Here, by arranging the electronic element mounting portion at a position farther from the rotation axis of the carriage than the first carriage fixing portion fixed to the carriage, a space for mounting the electronic elements on the FCA is ensured even in a small HDD. Can do. Also, by providing the electronic element mounting portion on the carriage side, the physical distance between the electronic element and the head is shortened, and the inductance is reduced.

  Here, the first carriage fixing part and the electronic element mounting part are arranged in parallel to the rotation axis of the carriage. That is, when the planes of the first carriage fixing part and the electronic element mounting part are arranged so as to intersect the rotation axis of the carriage, the shape of the FCA is distorted by the rotation of the arm, or the FCA performs the rotation operation of the arm. May be an obstacle. Therefore, by arranging the first carriage fixing portion and the electronic element mounting portion of the FCA in parallel to the rotation axis of the carriage as in the present invention, the FCA fixed to the carriage is distorted or the arm of the arm is caused by the FCA. The rotation operation can be prevented from being hindered.

  Further, a ground terminal can be provided on the second carriage fixing portion. And a carriage and a ground terminal are electrically connected by fixing a carriage and a 2nd carriage fixing | fixed part with a screw. In this way, by providing the ground terminal at the second carriage fixing portion formed to fix the FCA to the carriage, the FCA and the carriage are fixed by the screw, and the ground connection between the electronic element and the carriage is established. can do. Further, the FCA can be easily removed from the carriage by using a screw for fixing the second carriage fixing portion and the carriage.

  Further, the FCA includes a dynamic loop portion that extends from the electronic element mounting portion and is movable by the rotation of the HSA. Here, the carriage is provided with a limiter for fixing the end portion of the dynamic loop portion on the carriage side. Thereby, since the starting point of the dynamic loop portion is fixed, the dynamic loop portion can exhibit a more stable behavior with respect to the rotational motion of the HSA.

  The hard disk drive of the present invention further includes a top cover that covers the disk. The top cover may be provided with a dynamic loop fixing portion that fixes an end portion of the dynamic loop portion opposite to the carriage. Thereby, since the end point of the dynamic loop portion is fixed, the dynamic loop portion can exhibit a stable behavior even with respect to the rotational motion of the HSA.

  In order to solve the above-described problem, according to another aspect of the present invention, a head that reads and writes information on an information recording surface of a disk, and at least a pair of arms that support the head and a pair of arms. There is provided an FCA electrically connected to a head of an HDD having a carriage supported coaxially with the rotation axis of the arm and an HSA that rotates the head to a predetermined position on a disk. This FCA has a first carriage fixing part fixed to the carriage, and a second carriage fixing part fixed to the carriage at a position farther from the rotation axis of the carriage than the one carriage fixing part. The electronic device mounting portion mounted thereon, and a bent portion that is bent so that the first carriage fixing portion and the electronic device mounting portion face each other.

  According to the present invention, the FCA is fixed to the carriage at the first carriage fixing portion and the second carriage fixing portion provided in the electronic element mounting portion on which the electronic element is mounted. Here, even when the FCA is applied to a small HDD by adopting a configuration in which the electronic element mounting portion is arranged at a position farther from the rotation axis of the carriage than the first carriage fixing portion fixed to the carriage. Space for mounting the electronic element on the FCA can be secured. In addition, by providing the electronic element mounting portion in the portion located on the carriage side of the FCA, the physical distance between the electronic element and the head is shortened when the FCA is attached to the HDD, so that the inductance can be reduced.

  As described above, according to the present invention, it is possible to provide a hard disk drive and a flexible cable assembly (FCA) capable of maintaining electrical reliability and miniaturizing the apparatus.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<Schematic configuration of HDD>
First, a schematic configuration of an HDD according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic plan view showing the configuration of the HDD 100 according to the present embodiment.

  As shown in FIG. 1, the hard disk drive 100 according to this embodiment includes a spindle motor 110 that rotates a disk 120 that is a data storage medium fixed to a substantially rectangular base 105 by a clamp screw 115, and a disk 120. And an HSA 130 having a head 135 for recording and / or reproducing data. Although not shown in FIG. 1, a top cover that covers the upper surface of the disk 120 is provided to maintain the cleanliness of the HDD 100 together with the base 105.

  The spindle motor 110 is a motor that rotates the disk 120, and the spindle shaft is rotated by the action of a magnetic circuit and a magnet. A screw hole into which the clamp screw 115 is screwed is formed at the center of the spindle motor 110.

  As shown in FIG. 1, the HSA 130 includes a head 135 that records and / or reproduces data on the disk 120 and a pair of arms 131 that support an HGA 134 that has one end attached to the rotary shaft 133 and the other end. And is configured. By rotating the arm 131 and moving the head 135 to a predetermined position on the disk 120, data can be recorded and / or reproduced on the disk 120. The HSA 130 can be driven by, for example, a voice coil motor (VCM). The HSA 130 includes an FCA that is electrically connected to the head 135. Details of FCA will be described later.

  In such an HDD 100, the disk 120 fixed by the clamp screw 115 is rotated by, for example, the arrow D direction in FIG. Then, by moving the arm 131, the head 135 is moved to a predetermined position on the disk 120, and data is recorded and / or reproduced.

  The schematic configuration of the HDD 100 according to the present embodiment has been described above. Next, the FCA 150 according to the present embodiment will be described with reference to FIG. FIG. 2 is a plan view showing the configuration of the FCA 150 according to the present embodiment.

<Configuration of FCA>
The FCA 150 is a member in which electronic elements such as the chips 155a and 155b and the preamplifier IC 156 are mounted on an FPC formed by bonding a copper foil and a film-like insulating material (base film). A signal from the electromagnetic transducer is transmitted, and a drive current is transmitted to the VCM coil. As shown in FIG. 2, the FCA 150 according to the present embodiment includes six regions A to F.

  Area A is an area (first carriage fixing portion) that is fixed in contact with a metal carriage provided between the pair of arms 131 and is connected to the HGA 134. In the region A, a fixing portion 151 that is soldered to the carriage and a first engagement portion 152 that engages with the carriage are formed.

  The region B is a region (VCM connection unit) for connecting to the VCM, and for example, two connection units 153a and 153b are formed.

  A region C is a region (folded portion) where the wiring from the region A is inverted by about 180 °. By providing the region C, a region D and a region E, which will be described later, can be arranged to face the region A.

  The area D is an area (first electronic element mounting portion) where the chip 155a and 155b are mounted while being in contact with the carriage and via the wiring from the area C. In the region D, a ground terminal 154 for securing the ground with the HSA 130 is also provided. In the present embodiment, the ground terminal 154 is provided on the surface side of the second carriage fixing portion that fixes the carriage and the FCA 150 facing the carriage.

  The region E is a region (second electronic element mounting portion) in which a preamplifier IC 156 for amplifying a signal handled by the head 135 which is an electronic conversion element is mounted and a dynamic loop portion is drawn out. The region E is bent and fixed to the HSA 130 so that the notch 154a and the ground terminal 154 in the region D overlap. At this time, the region E is bent so that the chips 155a and 155b and the preamplifier IC 156 are located on the opposite side of the surface where the regions D and E face each other.

  The region F is a region (dynamic loop portion) that extends from the region E and operates dynamically according to the movement of the HSA 130.

<FCA fixing method>
Next, an assembly process of the HSA 130 according to the present embodiment and a method for fixing the FCA 150 to the carriage 160 will be described with reference to FIGS. FIG. 3 is a side view showing a state in which the FCA 150 according to the present embodiment is fixed to the carriage 160. FIG. 4 is a side view of the HSA 130 for explaining the HSA assembly process according to the present embodiment. FIG. 5 is a perspective view of FIG. 6 is a plan view of FIG. FIG. 7 is a plan view showing a state in which the FCA 150 is fixed to the carriage 160. 8A and 8B are partial side views for explaining a state in which the FCA 150 is fixed by the limiter 165. FIG. 8A shows a state before the FCA 150 is engaged with the limiter 165, and FIG. The engaged state is shown. FIG. 9 shows a state in which the other end of the FCA 150 is fixed to the dynamic loop fixing portion 103 of the top cover 101 of the HDD 100, (a) is a partial plan view, and (b) is a partial side view.

  In general, the assembly of the HSA 130 includes the first step of attaching the FCA 150 to the carriage 160, the second step of cleaning the carriage 160 and the FCA 150, the HGA 134 (the head 135, the gimbal 136, and the load beam 137 as shown in FIG. And a fourth step of connecting the HGA 134 and the FCA 150. The third step of mounting the arm 131 for supporting the arm 131 on the carriage 160 and fixing the arm 131 from above and below using the pivot 141, the washer 143, and the nut 145. And a fifth step of bending the FCA 150 and fixing the region D and the region E to the carriage 160. Hereinafter, a method of fixing the FCA 150 to the carriage 160 along the assembly process of the HSA 130 will be described.

  As shown in FIG. 3, the FCA 150 according to the present embodiment is first connected to the carriage 160 (first process). For example, the carriage 160 formed of a conductive material such as metal is supported coaxially with the rotating shaft 133 of the arm 131 between a pair of stacked arms 131 and functions as a spacer. A second protrusion 164 that protrudes downward on the head 135 side is formed on the carriage 160, and a limiter 165 for fixing the region E of the FCA 150 is formed on the second protrusion 164. On the opposite side of the carriage 160 from the second protrusion 164, a VCM coil 170 constituting the VCM is attached.

  The region A of the FCA 150 is fixed to the FCA attachment portion 161 of the carriage 160 located between the second protrusion 164 of the carriage 160 and the VCM coil 170. The area A of the FCA 150 is disposed in contact with the FCA attachment portion 161 so that the plane of the area A is substantially parallel to the direction of the rotation axis of the arm 131. Then, the fixing portion 151 in the region A is fixed to the FCA fixing portion 161a of the carriage 160, for example, with solder. Further, the first engaging portion 152 formed in the region A of the FCA 150 is engaged with the protrusion 163 formed in the FCA attachment portion 161 of the carriage 160.

  Next, the carriage 160 and the FCA 150 are cleaned in order to remove the contamination and the like generated during the solder fixing between the fixing portion 151 in the area A and the FCA fixing portion 161a of the carriage 160 (second step).

  Further, as shown in FIG. 4, the arm 131 is arranged so as to sandwich the carriage 160 to which the FCA 150 is fixed from above and below, and the pivot 141 is inserted into the through hole 132 (see FIG. 5) formed in the rotation shaft portion of the arm 131. And is fastened to the nut 145 with a washer 143 interposed (third step). Then, the wiring portion of the HGA 134 (wiring portion for connecting to the head 135 and the VCM coil 170; not shown) and the FCA 150 are electrically connected (fourth step).

  Thereafter, the area D and the area E of the FCA 150 are fixed to the carriage 160 (fifth step). In the fifth step, as shown in FIG. 5, the FCA 150 is inverted by about 180 ° with respect to the region A in the region C in a state where the region E and the region D are folded. Then, the region D and the region E bent so as to face the region A are fixed by screwing the screw 166 into the screw hole 162a of the carriage 160 as shown in FIG. At this time, the reinforcing plate 149 is provided between the region E and the region D of the FCA 150. Further, the area A of the FCA 150 may be reinforced by the reinforcing plate 147 as shown in FIG.

  In the FCA 150 according to the present embodiment, electronic elements such as the chips 155a and 155b and the preamplifier IC 156 are mounted in the areas D and E rather than the area A, so that the preamplifier IC 12 and the chip 13b are provided so as to face the carriage. As compared with the conventional FCA 10 that has been used, the electronic elements can be arranged even when the HDD 100 is downsized.

  Further, it is required as the electrical performance of the HDD 100 to reduce the inductance, which is a problem in high frequency technology. For this reason, in the FCA 150 according to the present embodiment, by mounting electronic devices such as the preamplifier IC 156 in the region D and the region E, the physical distance between the electronic device and the head 135 can be shortened compared to the conventional case. Inductance can be reduced.

  Further, the ground terminal 154 provided in the region E of the FCA 150 is brought into contact with the first protrusion 162 of the conductive carriage 160 by the screw 166, whereby the preamplifier IC 156 and the HSA 130 provided in the region E of the FCA 150 are brought into contact with each other. Connected to ground. Here, conventionally, the ground connection is made on the bracket side, and the ground line passes through the dynamic loop portion. The preamplifier IC is mounted on a bracket to which the end of the FCA dynamic loop opposite to the carriage is connected. The wiring (lead line) connecting the head and the preamplifier IC also passes through the dynamic loop. It was. As described above, when the ground line and the lead line are arranged in parallel in the dynamic loop portion, mutual interference occurs, and when a sudden voltage is applied to the ground line wired on the FCA 150, There is a possibility that destruction of the read element (EMI (Electromagnetic Interference), ESD (Electrostatic Discharge)) due to crosstalk from the ground line to the lead line may occur.

  On the other hand, in the present embodiment, as described above, since the ground connection between the preamplifier IC 156 and the HSA 130 is performed on the carriage 160 side, the ground line is not disposed in the dynamic loop portion. Further, by mounting the preamplifier IC 156 on the carriage 160 side, the wiring (lead line) connecting the head 135 and the preamplifier IC 156 is not arranged in the dynamic loop portion. Thereby, mutual interference between the ground line and the lead line can be prevented.

  In addition, since it is difficult to clean the entire HSA 130 including the carriage after the fifth step, it is necessary to avoid processing that generates contamination after the second step (for example, fixing with solder in the fifth step). There is. In this embodiment, by fixing the FCA 150 to the carriage 160 using the screw 166, no contamination is generated in the fifth step, and the quality of the HSA 130 can be maintained in the assembly step. Further, by using the screw 166 as the fixing member, the FCA 150 fixed to the carriage 160 can be easily removed rather than fixing using, for example, solder. Therefore, the HGA 134 can be easily used in the rework process performed after the assembly of the HSA 130. It is possible to exchange it.

  The assembly process of the HSA 130 and the method for fixing the FCA 150 to the carriage 160 have been described above.

  On the other hand, as the mechanical performance required for the HDD 100, the wiring section (area F (dynamic loop section)) of the FCA 150 that dynamically connects the HSA 130 and PCBA (Print Circuit Board Assembly) and operates dynamically is centered on the pivot 141. In some cases, the HSA 130 that performs the rotational motion always exhibits a stable behavior. For this reason, it is necessary to stabilize the positions of the start point and end point of the dynamic loop portion (region F).

  Here, an FPC using a technique called PSPI (Photo Sensitive Polyimide) is used for a small HDD. In the conventional FPC, a reinforcing plate made of, for example, stainless steel (SUS) and a film including wiring are bonded together using a resin, and then an outer shape is formed by mechanical punching. On the other hand, in the PSPI method, a photosensitive (Photo-Sensitive) polyimide (PI) film is formed on a reinforcing plate made of a thin SUS plate and subjected to processing such as exposure, development, film formation, and etching. FPC is formed. In this method, since the outer shape is finally formed by etching, a thin reinforcing plate is used as described above. For this reason, the problem that the starting point and end point of a dynamic loop part are not stable arises.

  For example, in this embodiment, when PSPI is used for FPC, the thickness of the reinforcing plate 149 is thinner than the thickness of the conventionally used reinforcing plate. For example, the thickness of a conventional reinforcing plate is about 150 μm, while that of PSPI is about 50 μm. At this time, since the thickness of the reinforcing plate provided at the starting point of the dynamic loop portion where the region F is drawn from the HSA 130 and the end point of the dynamic loop portion where the region F is introduced into the bracket on the PCBA side is thin, There is a problem that the starting point and the ending point are not stable during initial assembly. Further, when the HSA 130 rotates, the start point and the end point of the region F (dynamic loop portion) are easily deformed by the stress generated in the region F.

  With respect to such a problem, the FCA 150 according to the present embodiment is characterized in that the start point and end point of the area F (dynamic loop portion) of the FCA 150 are fixed, and the position of the start point and end point is also stabilized by the rotation operation of the HSA 130. And

  First, a limiter 165 is formed on the carriage 160 of the HDD 100 according to the present embodiment at a position corresponding to the area E of the FCA 150. As shown in FIG. 6, the limiter 165 is provided at the second projecting portion 164 of the carriage 160 and has a shape projecting toward the region C where the FCA 150 is reversed. A second engagement portion 157 that engages the limiter 165 is formed in the region E of the FCA 150. As shown in FIG. 8A, the FCA 150 inverted in the region C is drawn from the left to the right in FIG. Then, as shown in FIG. 8B, the limiter 165 is engaged with the second engagement portion 157 in the region E of the FCA 150. As a result, the start point of the region F, which is the dynamic loop portion of the FCA 150, is fixed and can be prevented from being easily deformed by the rotational movement of the HSA 130.

  On the other hand, the end point of the region F of the FCA 150 is fixed by a dynamic loop fixing portion 103 provided on the top cover 101 as shown in FIGS. 9 (a) and 9 (b). Although the dynamic loop fixing | fixed part 103 can be formed by providing a rib-shaped groove | channel as shown, for example in FIG.9 (b), the shape is not limited to this example. The FCA 150 extending from the carriage 160 toward the bracket 180 is once fixed to the dynamic loop fixing portion 103 of the top cover 101 and then connected to the bracket 180 provided on the base 105. The dynamic loop fixing portion 103 can be prevented from being easily deformed by the rotational movement of the HSA 130 by fixing the dynamic loop fixing portion 103 to the groove of the dynamic loop fixing portion 103 with the end point of the region F of the FCA 150 interposed therebetween.

  In the present embodiment, the configuration including the limiter 165 that fixes the start point side of the region F of the FCA 150 and the dynamic loop fixing unit 103 that fixes the end point side of the region F of the FCA 150 has been described, but at least the start point of the region F of the FCA 150 It is only necessary to provide a limiter 165 for fixing the side.

  The HDD 100 according to the embodiment of the present invention and the FCA 150 used therefor have been described above. According to the FCA 150 of the HDD 100, electronic elements such as the chips 155a and 155b and the preamplifier IC 156 are mounted on the electronic element mounting part (area D and area E) facing the carriage fixing part (area A) of the FCA 150. And As a result, the physical distance between the head 135 and the electronic element can be shortened, and the inductance that is a problem in the high frequency technology can be reduced.

  Further, by forming the ground terminal 154 for connecting the HSA 130 and the preamplifier IC 156 to the ground in the fixed portion of the FCA 150 in the region D with respect to the carriage 160, the ground line is not disposed in the dynamic loop portion. Further, since the preamplifier IC 156 is provided in the electronic element mounting portion of the FCA 150 fixed to the carriage 160, the wiring (lead line) connecting the head 135 and the preamplifier IC 156 is not arranged in the dynamic loop portion. With such a configuration, it is possible to prevent mutual interference between the ground line and the lead line, and it is possible to prevent EMI generated when a sudden voltage is applied to the ground line.

  Further, by including a limiter 165 that fixes the start point side of the region F of the FCA 150 and a dynamic loop fixing unit 103 that fixes the end point side of the region F of the FCA 150, the start point and end point of the dynamic loop part (region F) of the FCA 150 are provided. The position can be stabilized. Thereby, it is possible to always exhibit a stable behavior even with respect to the rotation operation of the HSA 130.

  By fixing the FCA 150 to the carriage 160 using the screw 166, no contamination is generated in the fifth process, and the quality of the HSA 130 can be maintained in the assembly process. Furthermore, since the FCA 150 fixed to the carriage 160 can be easily removed, the rework process can be easily performed.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the above embodiment, the ground terminal 154 for performing ground connection between the preamplifier IC 156 and the HSA 130 is formed in the region D as shown in FIG. 2, but the present invention is not limited to such an example. For example, as illustrated in FIG. 10, the ground terminal 254 may be formed in the region E of the FCA 250, and the notch 254 a may be formed in the region D so as to correspond to the ground terminal 254. In this case, as in the above-described embodiment, when the FCA 250 and the carriage 160 are fixed using the screw 166, the area of the ground terminal 254 becomes very large as compared with the case of joining by soldering. Further, depending on the terminal arrangement of the preamplifier IC 156, wiring may be required so as to surround the ground terminal 254 provided in the region E. Therefore, when forming the ground terminal 254 in the region E of the FCA 250, it is desirable to consider the connection method, space, and the like of the FCA 250 and the carriage 160.

  In the above embodiment, the ground terminal 154 is directly connected to the carriage 160 for ground connection, but the present invention is not limited to this example. For example, the ground terminal 154 and the carriage 160 are grounded via the screw 166 by screwing the screw 166 into the screw hole 162a of the carriage 160 so that the ground terminal 154 and the flange portion of the screw 166 are in contact with each other. Can do. At this time, the screw 166 is formed of a conductive material.

  Furthermore, in the above embodiment, the ground terminal 154 is provided in the second carriage fixing portion of the area D of the FCA 150, but the present invention is not limited to such an example. For example, a ground terminal may be provided in the second engagement portion 157 that engages with the limiter 165 in the region E of the FCA 150 so as to be connected to the ground.

1 is a schematic plan view showing a configuration of an HDD according to an embodiment of the present invention. It is a top view which shows the structure of FCA concerning the embodiment. It is a side view which shows the state which fixed the FCA concerning the embodiment to the carriage. It is a side view of HSA for demonstrating the HSA assembly process concerning the embodiment. FIG. 5 is a perspective view of FIG. 4. FIG. 5 is a plan view of FIG. 4. It is a top view which shows the state which fixes FCA to a carriage. It is a partial side view for demonstrating the state which fixes FCA with a limiter, (a) shows the state before FCA engages with a limiter, (b) shows the state with which FCA was engaged with the limiter . The other end of the FCA is fixed to the dynamic loop fixing portion of the top cover of the HDD, (a) is a partial plan view, and (b) is a partial side view. It is a top view which shows the modification of FCA concerning the embodiment. It is a top view which shows the structure of the conventional FCA. It is a top view which shows the structure of the conventional HSA.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Hard disk drive 101 Top cover 103 Dynamic loop fixing | fixed part 105 Base 110 Spindle motor 120 Disk 130 HSA
131 Arm 134 HGA
135 Head 141 Pivot 145 Nut 147, 149 Reinforcement plate 150 FCA
152 First engagement portion 154, 254 Ground terminal 154a, 254a Notch portion 155a, 155b Chip 156 Preamplifier IC
157 Second engagement portion 160 Carriage 162 First protrusion 164 Second protrusion 165 Limiter 166 Screw 170 VCM coil 180 Bracket

Claims (5)

A head for reading / writing information from / to the information recording surface of the disk;
At least a pair of arms that support the head, and a carriage that is supported coaxially with the rotation shaft of the arm between the pair of arms, and configured to rotate the head to a predetermined position on the disk A head stack assembly,
A flexible cable assembly electrically connected to the head;
With
The flexible cable assembly is:
A first carriage fixing part fixed to the carriage;
An electronic element mounting portion having a second carriage fixing portion that is fixed to the carriage at a position farther from the rotation axis of the carriage than the first carriage fixing portion;
A bent portion that is bent so that the first carriage fixing portion and the electronic element mounting portion face each other;
A dynamic loop portion extending from the electronic element mounting portion and movable by rotation of the head stack assembly;
Equipped with a,
The hard disk drive according to claim 1, wherein the carriage includes a limiter for fixing an end portion of the dynamic loop portion on the carriage side .   The hard disk drive according to claim 1, wherein the first carriage fixing part and the electronic element mounting part are arranged in parallel to a rotation axis of the carriage. The second carriage fixing portion is provided with a ground terminal,
The hard disk drive according to claim 1, wherein the carriage and the ground terminal are electrically connected by fixing the carriage and the second carriage fixing portion with a screw. A top cover that covers the disc;
The hard disk drive according to claim 1, wherein the top cover includes a dynamic loop fixing portion that fixes an end portion of the dynamic loop portion opposite to the carriage. A head that reads / writes information from / to the information recording surface of the disk, at least a pair of arms that support the head, and a carriage that is supported coaxially with the rotation axis of the arm between the pair of arms. A flexible cable assembly electrically connected to the head of a hard disk drive comprising a head stack assembly that rotates and moves to a predetermined position on the disk;
The flexible cable assembly is:
A first carriage fixing part fixed to the carriage;
An electronic element mounting portion having a second carriage fixing portion that is fixed to the carriage at a position farther from the rotation axis of the carriage than the first carriage fixing portion;
A bent portion that is bent so that the first carriage fixing portion and the electronic element mounting portion face each other;
A dynamic loop portion extending from the electronic element mounting portion and movable by rotation of the head stack assembly;
Equipped with a,
The flexible cable assembly according to claim 1, wherein the carriage includes a limiter for fixing an end portion of the dynamic loop portion on the carriage side .

Images