JP2012104192A - Actuator fixing mechanism and disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actuator fixing mechanism capable of suppressing oscillation and an impact generated by a latch mechanism.SOLUTION: The actuator fixing mechanism fixes an actuator for rotating and moving a head for recording and reproducing data in a disk-shaped recording medium with respect to the recording medium at a retracted position during a non-operation period. The actuator fixing mechanism includes: arm portions 142a and 142b provided so as to rotate between a first position in which the actuator is fixed in the retracted position by engaging a portion to be engaged of the actuator with an engaging portion thereof and a second position in which the actuator can be moved onto the recording medium from the retracted position of the actuator, with a shaft portion as a rotation center; a regulation member for regulating rotation of the arm portions according to an operation state of the actuator; and a damping member 146 which is provided on at least a side face of the shaft portion 143 in a side opposite to a base provided with the actuator fixing mechanism so as to be brought into contact with the base, and has elasticity.

Description

  The present invention relates to an actuator fixing mechanism that restricts the movement of an actuator and a disk device including the same.

  For example, a disk device such as a hard disk drive (hereinafter referred to as “HDD”) records and reproduces information with a head while a disk, which is a recording medium for recording information, is rotated by a spindle motor. . The HDD is mounted on, for example, a notebook personal computer, an MP3 player, an automobile, and the like, and has various uses.

  In the disk device, a suspension having a head at one end is rotated by a spindle motor to move the head to a predetermined area above the disk and other areas. The disk device moves the head above the disk when recording information on the disk or reading information stored on the disk. The head floats due to the airflow on the disk surface rotating at high speed, and acquires information recorded on the disk while maintaining a slight gap between the head and the disk surface.

  On the other hand, when the head is on the disk, the head and the surface of the disk are highly smooth, so when they come into contact with each other, they are firmly adsorbed and the disk cannot be rotated. When stopping the disk device, the disk device moves the head to a ramp outside the disk. At this time, the disk device is provided with a latch mechanism as an actuator fixing mechanism for holding the actuator with the head retracted to the ramp so that the head retracted to the ramp does not move on the disk.

  In general, the latch mechanism includes a magnet latch mechanism using a magnet attraction force, an inertia latch mechanism including a mechanical link mechanism using an inertia force of an arm of the latch mechanism, and the like. For example, as shown in FIG. 8, the conventional latch mechanism 30 includes a latch 31 that restricts the movement of the actuator 40 and a magnet (not shown) that restricts the movement of the latch 31.

  The latch 31 is provided adjacent to the VCM coil 45 of the actuator 40 between the base 10 and the yoke 20. The latch 31 is provided so as to be rotatable around the rotation axis, and the rotation is regulated by, for example, a metal pin 37 provided in the latch 31. In other words, the metal pin 37 disposed on the latch 31 is magnetically attracted by the magnet, so that the actuator 40 that attempts to rotate the head in the direction of moving on the disk can be fixed by the latch 31. .

  As shown in FIGS. 14 and 15, the conventional latch 31 is inserted into a base pin (see reference numeral 12 in FIG. 17) that extends in the vertical direction from the base 10 and is against a shaft portion 33 that serves as a rotation center portion of the latch 31. The front arm 32a is provided with an engaging portion 32c that engages with the engaged portion of the actuator 40, and the rear arm 32b. A through hole 34 into which the base pin of the base 10 is inserted is formed in the shaft portion 33. In addition, protrusions 35a to 35d and 36a to 36d are arranged at equal intervals on the upper surface and the lower surface of the shaft portion 33, respectively. When the configuration of the conventional latch 31 is shown in a simplified manner in FIG. 16, the front arm portion 32 a and the rear arm portion 32 b protrude from the shaft portion 33 in a direction orthogonal to the rotation axis. Hemispherical protrusions 35a to 35d and 36a to 36d are provided on the upper surface and the lower surface of the shaft portion 33, respectively.

  Usually, the distance between the base 10 and the yoke 20 is set to such a size that the latch 31 can move. Therefore, when the disk device (for example, HDD) is placed face up, that is, when the base 10 is positioned on the mounting surface side of the HDD, the protrusions 36a to 36d of the latch 31 are formed on the base 10 as shown in FIG. It will be in the state which touched. On the other hand, when the HDD is placed face down, that is, when the yoke 20 is positioned on the HDD mounting surface side, the protrusions 35a to 35d of the latch 31 are in contact with the yoke 20, as shown in FIG. Become. The protrusions 35a to 35d and 36a to 36d have such a shape as to make point contact with the base 10 and the yoke 20 as described in, for example, Patent Document 1, and thereby the latch 31 and the base 10 In addition, sliding friction with the yoke 20 can be reduced.

JP 2003-151225 A

  However, since the latch 31 can be moved between the base 10 and the yoke 20, there is a problem that when the HDD is subjected to vibration or impact, the latch 31 moves and impacts the base 10 or the yoke 20. . Since the vibration between the latch 31 and the yoke 20 is not directly transmitted to the base 10, it is considered that the impact on the HDD performance is not large. However, there is a concern that the vibration generated by the impact between the latch 31 and the base 10 is transmitted to other components connected to the base 10 and affects the performance of the HDD.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a novel and improved actuator fixing mechanism capable of suppressing vibration and impact generated by a latch mechanism. And providing a disk device.

  In order to solve the above-described problems, according to an aspect of the present invention, an actuator that rotates and moves a head for recording and reproducing data on a recording medium with respect to a disk-shaped recording medium is fixed at a retracted position when not operating. A securing mechanism is provided. The actuator fixing mechanism includes a first position where the engaged portion and the engaging portion of the actuator are engaged and the actuator is fixed at the retracted position, and a second position which is positioned when the actuator is unlocked at the retracted position. And at least an actuator fixing mechanism of the shaft portion, a restricting member for restricting the rotation of the arm portion according to the operating state of the actuator, and the shaft portion. An elastic damping member provided on the side facing the provided base so as to be in contact with the base is provided.

  The shaft portion may include one or a plurality of protrusions on at least one end surface facing the base, and the damping member may be provided so as to protrude toward the base side from the protrusion provided on one end surface of the shaft portion.

  The damping member may be provided with an inclination with respect to the rotation center axis direction of the shaft portion.

  The damping member may be a plate-like thin member that protrudes from one end surface facing the base of the shaft portion toward the base.

  The regulating member includes a metal member provided on one side of the arm portion with respect to the shaft portion, and a magnet provided at a position facing the metal member when the arm portion is located at the first position. May be provided at a diagonal position with respect to the metal member provided at one end of the arm part and the shaft part serving as the rotation center of the arm part.

  The restricting member may fix the arm portion engaged with the engaged portion of the actuator at the first position, and release the arm portion when recording / reproducing data of the recording medium by the head.

  The shaft portion may further include a guard member that covers the outer peripheral portion of the damping member.

  The arm portion may include an opening portion in which regions corresponding to the damping member and the guard portion are opened.

  A plurality of damping members may be arranged at a predetermined interval in the circumferential direction of the shaft portion on one end surface facing the base of the shaft portion.

  Further, the damping member includes a contact portion that contacts the base, a leg portion that is connected to the contact portion and the one end surface facing the base of the shaft portion, and is formed with a slit that opens in the rotation axis direction of the arm portion. You may comprise so that it may become.

  In order to solve the above problems, according to another aspect of the present invention, a disk-shaped recording medium for storing data, a rotation driving unit for rotating the recording medium, a base for supporting the rotation driving unit, An actuator for rotating and moving a head for recording / reproducing data on a recording medium, and an actuator fixing mechanism for fixing the actuator. The actuator fixing mechanism engages an engaged portion and an engaging portion of the actuator to move the actuator. An arm portion that is rotatably provided with a shaft portion as a rotation center between a first position that is fixed at the retracted position and a second position that is positioned when the fixing of the actuator at the retracted position is released; At least an actuator fixing mechanism for the shaft member and the restricting member for restricting the rotation of the arm portion according to the operating state of the On the side base facing to be, provided to be in contact with the base, characterized in that it comprises a damping member having elasticity, the disk device is provided.

  As described above, according to the present invention, it is possible to provide an actuator fixing mechanism and a disk device that can suppress vibration and impact generated by the latch mechanism.

1 is a plan view showing a schematic configuration of an HDD according to a first embodiment of the present invention. It is a top view which shows the latch which concerns on the same embodiment. It is a bottom view which shows the latch which concerns on the same embodiment. It is a fragmentary perspective view which shows the structure of the damping member which concerns on the same embodiment. 5 is a cross-sectional view taken along the line II of FIG. It is the schematic which shows the latch which concerns on the same embodiment. It is explanatory drawing which shows an example of a motion when a latch vibrates up and down. It is a perspective view which shows the structure of the latch which concerns on the 2nd Embodiment of this invention. It is a fragmentary perspective view which shows one structural example of a latch provided with a several damping member. It is a fragmentary perspective view which shows the other structural example of a latch provided with a some damping member. It is a partial side view which shows one structural example of a latch provided with the damping member of a slit structure. It is a partial side view which shows the other structural example of a latch provided with the damping member of a slit structure. It is a fragmentary perspective view which shows the arrangement structure of the latch mechanism in a disk apparatus, a base, a yoke, and a VCM coil. It is a top view which shows the conventional latch. It is a bottom view which shows the conventional latch. It is the schematic which shows the conventional latch. It is explanatory drawing which shows the positional relationship of a latch, a base, and a yoke when HDD is faced up. It is explanatory drawing which shows the positional relationship of a latch, a base, and a yoke when HDD is faced down.

  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.

<1. First Embodiment>
First, the schematic configuration of the HDD according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing a schematic configuration of the HDD 100 according to the present embodiment. FIG. 2 is a plan view showing the latch 141 according to the present embodiment. FIG. 3 is a bottom view showing the latch 141 according to the present embodiment. FIG. 4 is a partial perspective view showing the configuration of the damping member 146 according to the present embodiment. 5 is a cross-sectional view taken along the line II of FIG. FIG. 6 is a schematic diagram showing the latch 141 according to the present embodiment. FIG. 7 is an explanatory diagram showing an example of movement when the latch 141 vibrates up and down. 6 and 7, the guard portion 145 is not shown for simplification of the drawings accompanying the description.

  The disk device according to this embodiment is, for example, an HDD 100, and as shown in FIG. 1, a disk 105 that is a data recording medium, a base 110, a spindle motor 120 that holds and rotates the disk 105, and the disk 105. The actuator 130 for rotating the head 135 for recording and / or reproducing data and the latch mechanism 140 are provided.

  In addition to supporting the spindle motor 120, the base 110 includes a plurality of actuators such as an actuator 130, which will be described later, and a stopper that is an impact buffering mechanism that restricts the operating range of the actuator 130 to prevent contact between the head 135 and other members. Mechanical parts are assembled. A latch 141 of a latch mechanism 140 that restricts the movement of the actuator 130 when the HDD 100 is not operating is provided so as to be rotatable with respect to the base 110. The latch 141 is attached to a base pin (reference numeral 112 in FIG. 7) provided so as to protrude vertically from the base 110, and rotates around the base pin.

  The spindle motor 120 is a rotation driving unit that rotates the disk 105. The spindle motor 120 includes a rotating shaft that is the center of rotation of the spindle motor 120, a bearing provided around the rotating shaft, a hub that holds the disk 105 via the bearing, and a magnet rotor provided on the outer periphery of the hub. And a stator portion composed of a plurality of stator coil arrays. The spindle motor 120 rotates by repeating the attracting operation between the magnetic rotor generated by the current flowing through the stator coil and the magnet rotor.

  The actuator 130 is provided with a head 135 for recording and / or reproducing data on the disk 105, and is attached to the base 110 in a rotatable state via a rotation shaft (pivot) 133. The actuator 130 includes, for example, a pair of HGA (Head Gimbal Assembly) 137 for one disk 105. The pair of HGAs 137 are stacked with a predetermined gap, and are arranged so that the disk 105 is sandwiched between the gaps. When data is recorded on and / or reproduced from the disk 105, the actuator 130 is rotated to move the head 135 to a predetermined position on the disk 105. The actuator 130 is rotationally driven by a voice coil motor (VCM; Voice Coil Motor).

  The latch mechanism 140 is an actuator fixing mechanism for fixing the actuator 130 when the HDD 100 is not operating. The latch mechanism 140 includes a latch 141 that restricts the movement of the actuator 130 and a magnet (not shown) that is a restriction member that restricts the movement of the latch 141.

  As shown in FIGS. 2 and 3, the latch 141 is inserted into a base pin (reference numeral 112 in FIG. 7) that vertically protrudes from the base 110, and a front arm portion 142a and a rear arm are attached to a shaft portion 143 serving as a rotation center portion. The arm portion is composed of the arm portion 142b. The front arm portion 142a is an engaged portion (see FIG. 5) provided in the actuator 130 in order to prevent the movement of the actuator 130 that attempts to rotate the head 135 in the direction in which the head 135 moves on the disk when the HDD 100 is not operating. (Not shown) and an engaging portion 142c that restricts the movement of the actuator 130 on the lower surface side. The rear arm 142b is provided with a metal pin 149 as a restricting member that restricts the rotation of the latch 141. The latch 141 rotates the shaft portion 143 inserted through the base pin of the base 110 using the attractive force acting between the metal pin 149 provided on the rear arm portion 142b and the magnet provided on the base 110. The actuator 130 that rotates as a central portion and tries to rotate in the direction in which the head 135 moves on the disk when the HDD 100 is not operating can be grasped.

  The lower surface and the upper surface of the shaft portion 143 of the latch 141 are provided with one or a plurality of protrusions in order to reduce the contact surface with the base 110 or the yoke (reference numeral 150 in FIG. 7) and improve the slidability. . Therefore, the number of projections provided on each surface is preferably as small as possible. However, in order to stabilize the mounting state of the latch 141 with respect to the base 110 or the yoke 150, for example, as shown in FIG. ~ 148c) may be provided. Note that the latch 141 according to the present embodiment includes a damping member 146 as described later. As shown in FIG. 3, the lower surface side of the shaft portion 143 of the present embodiment is supported on the base 110 by two projecting portions 147 a and 147 b and a projecting portion 146 a of the damping member 146. Further, the protrusions 147a, 147b, 148a to 148c according to the present embodiment are formed in a substantially hemispherical shape in order to reduce the contact area with the contact surface.

  The latch mechanism 140 according to the present embodiment includes a damping member 146 on the shaft portion 143 in order to suppress vibration and impact generated by the latch mechanism 140 that affect the performance of the HDD 100. The structure of the damping member 146 is shown in FIGS. As shown in FIGS. 4 and 5, the damping member 146 is a member provided so as to be inclined with respect to the rotation axis from the side portion 143 b of the shaft portion 143 on the front arm portion 142 a side. The damping member 146 of the present embodiment is inclined in a direction away from the shaft portion 143, and a substantially hemispherical projection 146a is formed at the tip thereof.

  As described above, the protruding portion 146a contacts the base 110 when the HDD 100 is installed face up, like the protruding portions 147a and 147b provided on the lower surface of the shaft portion 143. The latch 141 is supported by the base 110 at these three locations. As shown in FIG. 5, the protruding portion 146 a of the damping member 146 may protrude from the other protruding portions 147 a and 147 b provided on the same surface. As a result, when the latch 141 moves up and down due to vibration or impact, the projection 146a of the damping member 146 contacts the base 110 before the other projections 147a and 147b, so that the impact can be mitigated. .

  Therefore, when the protrusion 146a of the damping member 146 is inserted into the base pin 112 of the base 110 of the HDD 100 and the HDD 100 is placed face up, the protrusion 146a protrudes more toward the base 110 than the other protrusions 147a and 147b. Become. However, the present invention is not limited to this example. For example, the protrusion 146a of the damping member 146 and the other protrusions 147a and 147b may be formed at the same height. In this case, the latch mechanism 140 rotates with the base pin 112 into which the through hole 143a of the shaft portion 143 is inserted being in contact with the base 110 at three points.

  Furthermore, the latch 141 according to the present embodiment includes a guard portion 145 that protects the damping member 146. For example, as shown in FIG. 4, the guard portion 145 has a part of the lower surface side of the shaft portion 143 that extends from the rear arm portion 142 b side toward the front arm portion 142 a side and surrounds the damping member 146. It is provided along the outer peripheral surface. At this time, the guard member 145 only needs to cover at least the outer surface of the damping member 146 (the surface opposite to the shaft portion 143), and as shown in FIG. 4, there is a gap between the guard member 145 and the shaft portion 143. There may be. The damping member 146 may be damaged due to various causes of damage, such as handling at the manufacturer, contact between the latches 141 due to the packing state at the time of transportation, handling in the HDD assembling process or the previous stage. Therefore, the guard member 145 is provided to prevent the damping member 146 from being damaged due to the cause of the damage.

  The latch 141 according to the present embodiment is integrally formed by, for example, injection molding. At this time, an opening 144 is formed at a position corresponding to the guard portion 145 and the damping member 146 of the front arm portion 142a so that the die can be removed in the vertical direction (z direction) during molding. Thereby, the mold for forming the guard part 145 and the damping member 146 can be pulled out from the opening 144, and the latch 141 according to the present embodiment can be easily formed.

  As described above, the latch mechanism 140 according to this embodiment is characterized in that the latch 141 includes the damping member 146. The configuration and operation of the latch mechanism 140 will be described in more detail with reference to FIGS. 6 and 7. The latch 141 includes a shaft portion 143 that is the center of rotation of the latch 141 with respect to the rotation axis, as shown in FIG. The arm part which consists of the front arm part 142a and the rear arm part 142b is provided so that it may orthogonally cross. And the damping member 146 is provided in the lower surface side of the shaft part 143 so that it may incline toward the opposite side to a rotating shaft from the shaft part 143. As shown in FIG. The damping member 146 is provided at a position that is substantially symmetrical with the metal pin 149 with respect to the shaft portion 143. Accordingly, it is possible to effectively reduce vibration and impact by providing only one damping member 146.

  As described above, the protruding portion 146a of the damping member 146 has the same height as the other protruding portions 147a and 147b provided on the same surface of the shaft portion 143, or the base 110 side relative to the other protruding portions 147a and 147b. It is provided so as to protrude. In any case, when the latch 141 is placed on the base 110 and the protrusions 147a, 147b, and 146a are in contact with the base 110, that is, when the latch 141 is stationary, the left diagram in FIG. As shown, these protrusions 147a, 147b, 146a may be the same height. When the protrusions 147a, 147b, and 146a have the same height, the damping member 146 does not affect the rotation of the latch 141.

  By providing such a damping member 146, as shown in the right diagram of FIG. 7, when the latch 141 moves up and down due to vibration or impact and collides with the base 110, the damping member 146 is more than the other protrusions 147a and 147b. Also contacts the base 110 first. The damping member 146 in contact with the base 110 bends due to its own elasticity and reduces the impact. Therefore, it is possible to prevent the vibration of the latch 141 from being directly transmitted to the base 110 and increasing the influence on other components.

  The configuration and operation of the latch mechanism 140 including the damping member 146 has been described above. By providing the damping member 146 in the latch 141 of the latch mechanism 140, vibrations and shocks transmitted from the latch mechanism 140 to the base 110 can be mitigated. Therefore, vibrations and shocks of the base 110 that affect the performance of the HDD 100 can be reduced. Can be reduced.

  The HDD 100 composed of such components rotates the disk 105 by the spindle motor 120, for example, counterclockwise, and when recording / reproducing data, the actuator 130 is driven to drive a predetermined disk 105. The head 135 is moved to a position. On the other hand, when data recording / reproduction is not performed, that is, when the HDD 100 is stopped, the actuator 130 is driven to retract the head 135 from the disk 105 to the retracted position. When the head 135 is retracted from the disk 105, the movement of the actuator 130 is restricted by the latch mechanism 140 so that the head 135 does not move onto the disk 105.

  The configuration of the HDD 100 according to the present embodiment has been described above. In the HDD 100 according to the present embodiment, the damping member 146 is provided in the latch 141 of the latch mechanism 140, so that vibration and impact that affect the performance of the HDD 100 can be prevented from being directly transmitted from the latch mechanism 140 to the base 100. Further, by providing the damping member 146 substantially symmetrically with the metal pin 149 with respect to the shaft portion 143, it is possible to effectively reduce vibration and impact even if only one damping member 146 is provided in the latch 141. Furthermore, the damping member 146 can be easily formed by providing the opening 144 in the front arm 142a.

<2. Second Embodiment>
The damping member provided in the latch of the latch mechanism of the HDD 100 can be realized not only by a configuration provided with an inclination with respect to the shaft portion 143 as illustrated in FIGS. 2 to 7 but also by other configurations. it can.

  For example, instead of the latch mechanism 140 described above, a latch mechanism 240 having the configuration shown in FIG. FIG. 8 is a perspective view showing the configuration of the latch 241 of the latch mechanism 240 according to the second embodiment of the present invention. The latch mechanism 240 has basically the same configuration as the latch mechanism 140 according to the first embodiment, but the configuration of the damping member 246 is different. That is, the latch 241 of the latch mechanism 240 includes a front arm portion 242a and a rear arm portion 242b extending in a direction perpendicular to the rotation axis from the shaft portion 243, and two projecting portions 247a and 247b on the lower surface side of the shaft portion 243. Is provided. A damping member 246 is provided on the lower surface side of the shaft portion 243, and a guard portion 245 is provided so as to surround the damping member 246. The front arm portion 242a has an opening 244 in a region corresponding to the guard portion 245.

  The damping member 246 according to the present embodiment is a plate-like thin member that protrudes obliquely toward the rotation axis from the lower surface of the shaft portion 243 to the surface facing the base 110 (z-axis negative direction side). Similar to the first embodiment, the damping member 246 is provided to have the same height as the protrusions 247a and 247b or to protrude to the base 110 side from the protrusions 247a and 247b. In any case, when the latch 241 is placed on the base 110 and the protrusions 247a, 247b, and 246 are in contact with the base 110, that is, when the latch 241 is stationary, these protrusions. The portions 247a, 247b, and 246 may be the same height. When the protrusions 247a, 247b, and 246 have the same height, the damping member 246 does not affect the rotation of the latch 241.

  Similarly to the damping member 146 according to the first embodiment, when the latch 241 moves in the vertical direction (z direction) due to vibration or impact, the damping member 246 also has other protrusions 247a provided on the lower surface of the shaft portion 243, It contacts the base 110 before 247b. Then, the damping member 246 bends, absorbs vibrations and shocks.

  The damping member 246 of the present embodiment can be formed by injection molding that can be released in the vertical direction (z direction), like the damping member 146 according to the first embodiment. Thereby, the latch mechanism 240 can be produced at low cost.

<3. Third Embodiment>
In the above-described embodiment, the configuration of the latch mechanism including one damping member has been described. However, the present invention is not limited to such an example, and a plurality of damping members may be provided in the latch mechanism. Hereinafter, based on FIG. 9 and FIG. 10, the structural example of the latch of a latch mechanism provided with a some damping member is demonstrated. FIG. 9 is a partial perspective view showing a configuration example of a latch including a plurality of damping members. FIG. 10 is a partial perspective view showing another configuration example of a latch including a plurality of damping members.

  As an example of a latch including a plurality of damping members, for example, as shown in FIG. 9, a plurality of contact portions with the base 110 provided on the lower surface side of the shaft portion 343 can be considered as damping members. The damping members 3461 to 3463 shown in FIG. 9 are arranged at equal intervals along the outer periphery of the lower surface of the shaft portion 343. The damping members 3461 and 3462 include two contact portions 346a and 346b, respectively. Each of the contact portions 346 a and 346 b is a substantially columnar member arranged so that its longitudinal direction follows the outer periphery of the shaft portion 343, and each of the contact portions 346 a and 346 b is in line contact with the base 110. The damping member 3463 includes a contact portion 346a and a substantially hemispherical protrusion 347. The substantially hemispherical protrusion 347 can be configured in the same manner as the protrusion 346a and the like in the above embodiment.

  Between the contact portions 346a and 346b of the damping members 3461 and 3462 and between the contact portion 346a and the protrusion 347 of the damping member 3463, there is a predetermined gap in the adjacent direction (the circumferential direction of the shaft portion 343). Is provided. When the latch members 3461 to 3463 of the latch move in the vertical direction (z direction) due to vibration or impact, the contact portions 346a and 346b or the protrusions 347 of the damping members 3461 to 3463 pressed against the base 110 Toward the circumferential direction of the shaft portion 343. Thereby, it is possible to reduce vibrations and shocks due to the movement of the latch in the vertical direction being absorbed by the damping members 3461 to 3463 and transmitted to the base 110.

  Further, as another example of a latch having a plurality of damping members, for example, as shown in FIG. 10, an annular lower surface with the base 110 provided on the lower surface side of the shaft portion 443 is notched so as to have elasticity. May be. The lower surface of the shaft portion 443 in FIG. 10 has a larger diameter than the shaft portion of the shaft portion 443, and is formed so that the damping members 446a to 446c formed by providing the notches are easily bent in the radial direction. ing. In addition, the lower surface of the shaft portion 443 has a donut shape in which a curve protruding toward the base 110 in the radial direction is continuously formed in an annular shape, and is in line contact with the base 110. Thereby, the contact portion between the latch mechanism and the base 110 can be reduced.

  In the latch of FIG. 10, as described above, the three damping members 446 a to 446 c are provided at substantially equal intervals along the circumferential direction of the shaft portion 443. When the latch moves in the vertical direction (z direction) due to vibration or impact, the damping members 446a to 446c pressed against the base 110 have a diameter of the shaft portion 443 toward the direction away from the rotation shaft. Move in the direction. Thereby, it is possible to reduce vibrations and shocks due to the movement of the latch in the vertical direction being absorbed by the damping members 446a to 446c and transmitted to the base 110.

  As shown in FIGS. 9 and 10, vibration and impact can be more reliably mitigated by providing a plurality of damping members in the latch of the latch mechanism.

<4. Fourth Embodiment>
The damping member of the latch of the latch mechanism according to the present embodiment can also be configured by providing a slit between the shaft portion of the latch and the protruding portion that contacts the base. Hereinafter, based on FIG. 11 and FIG. 12, the structural example of a latch provided with the damping member of a slit structure is demonstrated. FIG. 11 is a partial side view showing one configuration example of a latch including a damping member having a slit structure. FIG. 12 is a partial side view illustrating another configuration example of a latch including a damping member having a slit structure.

  As an example of a latch having a slit structure damping member, for example, as shown in FIG. 11, a plurality of projecting portions 547 a to 457 c contacting the damping member with the base 110 provided on the lower surface side of the shaft portion 543, and the projecting portions It can also be comprised from the leg parts 546a-546c in which 547a-457c was provided. Slits 545a to 545c are formed in the leg portions 546a to 546c, respectively. The slits 545a to 545c are provided so as to have a gap in the rotation axis direction from the outer peripheral portion of the shaft portion 543 toward the rotation axis. Thereby, when the latch moves in the vertical direction (z direction) and tilts, at least any one of the leg portions 546a to 546c bends with respect to the shaft portion 543, and vibration and impact can be reduced.

  As another example of a latch having a slit-shaped damping member, for example, as shown in FIG. 12, a plurality of protrusions 647 a to 657 c that contact the damping member with a base 110 provided on the lower surface side of the shaft portion 643. And leg portions 646 provided with protrusions 647a to 657c. One leg 646 may be provided with one slit 645. The slit 645 is, for example, from the front arm portion to the rear arm portion (not shown in FIG. 12. Here, the front arm portion and the rear arm portion with respect to the shaft portion 643 are the shaft portion of FIG. 2 in the first embodiment. It is assumed that the arrangement relationship of the front arm portion 142a and the rear arm portion 142b with respect to 143 is the same as that of the rear arm portion 142b. Thereby, a damping member can be functioned similarly to the damping member 146 which concerns on 1st Embodiment.

  When the slit is provided as in the damping member according to the fourth embodiment, it is necessary to perform die cutting in the lateral direction (direction orthogonal to the rotation axis) when the latch is molded. The damping member can function in the same manner. Therefore, the vibration and impact transmitted to the base 110 due to the vertical movement of the latch can be reduced, and the performance of the HDD 100 can be maintained.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the above-described embodiment, the configuration in which the damping member is provided only on the surface facing the base among the end surfaces of the shaft portion of the latch constituting the latch mechanism is described, but the present invention is not limited to such an example. For example, you may provide the damping member mentioned above in the surface facing the yoke of a shaft part. Thereby, the impact force transmitted from the latch to the yoke can also be reduced, and the performance of the HDD can be further stabilized.

  In the above embodiment, the latch is integrally formed by injection molding. However, the present invention is not limited to this example. For example, the latch is provided by providing a damping member made of a separate member on the shaft portion. May be configured.

  Furthermore, in the said embodiment, although the projection part provided in the upper surface and lower surface of the shaft part of a latch was formed in the substantially hemispherical shape, this invention is not limited to this example. For example, the protrusion may have an R shape, and it is particularly desirable to have a shape that can reduce a contact area with a contact surface such as a base or a yoke.

  Furthermore, in the above embodiment, the rear arm portion 142 of the latch 141 is provided with the metal pin 149 that rotates the latch 141 by acting with a magnet, but the present invention is not limited to such an example. For example, instead of the metal pin 149, a metal member such as a metal ball or a metal piece that is attracted to the magnet by the magnetic force of the magnet may be provided.

100 HDD
105 Disc 110 Base 112 Base pin 120 Spindle motor 130 Actuator 140 Latch mechanism 141 Latch 142a Front arm part 142b Rear arm part 143 Shaft part 144 Opening part 145 Guard part 146 Damping member 146a, 147a, 147b, 148a, 148b, 148c Projection part

Claims (11)

An actuator fixing mechanism for fixing an actuator for rotating a head for recording / reproducing data to / from a disk-shaped recording medium with respect to the recording medium at a retracted position when not operating,
A first position for engaging the engaged portion and the engaging portion of the actuator to fix the actuator to the retracted position; and a first position enabling the actuator to move from the retracted position onto the recording medium. Between the two positions, an arm portion that is rotatably provided with the shaft portion as a rotation center;
A restricting member that restricts the rotation of the arm portion according to the operating state of the actuator;
An elastic damping member provided on the side of the shaft portion facing at least the base on which the actuator fixing mechanism is provided so as to be in contact with the base;
An actuator fixing mechanism comprising: The shaft portion includes at least one protrusion on one end face facing the base,
2. The actuator fixing mechanism according to claim 1, wherein the damping member is provided so as to protrude toward the base side from the protrusion provided on one end surface of the shaft portion.   3. The actuator fixing mechanism according to claim 1, wherein the damping member is provided with an inclination with respect to a rotation center axis direction of the shaft portion.   3. The actuator fixing mechanism according to claim 1, wherein the damping member is a plate-like thin member that protrudes from the one end surface of the shaft portion facing the base toward the base. The restriction member includes a metal member provided on one side of the arm part with respect to the shaft part, and a magnet provided at a position facing the metal member when the arm part is located at the first position. Consists of
The said damping member is provided in the position diagonally with respect to the said metal member provided in the one side of the said arm part, and the said shaft part used as the rotation center of the said arm part, It is characterized by the above-mentioned. The actuator fixing mechanism of any one of -4.   The restricting member fixes the arm portion that engages with the engaged portion of the actuator at the first position, and releases the fixing of the arm portion when recording / reproducing data of the recording medium by the head. The actuator fixing mechanism according to claim 5, wherein:   The actuator fixing mechanism according to claim 1, wherein the shaft portion further includes a guard member that covers an outer peripheral portion of the damping member.   The actuator fixing mechanism according to claim 7, wherein the arm part includes an opening part in which a region corresponding to the damping member and the guard part is opened.   2. The actuator fixing mechanism according to claim 1, wherein a plurality of the damping members are arranged at a predetermined interval in a circumferential direction of the shaft portion on one end surface of the shaft portion facing the base. 3. The damping member is
A contact portion in contact with the base;
A leg portion formed with a slit formed by connecting one end surface of the shaft portion facing the base and the contact portion and opening in a rotation axis direction of the arm portion;
The actuator fixing mechanism according to claim 1, comprising: A disk-shaped recording medium for storing data;
A rotation drive unit for rotating the recording medium;
A base that supports the rotation drive unit;
An actuator for rotating a head for recording / reproducing data on the recording medium with respect to the recording medium;
An actuator fixing mechanism for fixing the actuator;
With
The actuator fixing mechanism is
A first position for engaging the engaged portion and the engaging portion of the actuator to fix the actuator to the retracted position; and a first position enabling the actuator to move from the retracted position onto the recording medium. Between the two positions, an arm portion that is rotatably provided with the shaft portion as a rotation center;
A restricting member that restricts the rotation of the arm portion according to the operating state of the actuator;
An elastic damping member provided on the side of the shaft portion facing at least the base on which the actuator fixing mechanism is provided so as to be in contact with the base;
A disk device comprising:

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