Nhk Spring Co., Ltd.

Other

Osamu Iriuchijima

Masao Hanya

Yasuji Takagi

Tetsuya Fujiwara

Hideki Kashima

Hiroshi Okamoto

Kenichi Takikawa

Hiroshi Ozawa

Tatsuhiko Nishida

Hideki Fuchino

Takumi Karasawa

Akihiro Takei

Koji Uozumi

Chihiro Kono

Tsukasa Higashi

Osamu Ohkawara

Toshio Shiigi

Akinobu Ishizaka

Ryozo Oomoto

A head suspension has a conductive base plate, a piezoelectric element, and a load beam. The piezoelectric element deforms in response to a voltage applied thereto, thereby moving the load beam relative to the base plate in a sway direction. The head suspension includes an actuator base integral with the base plate, an auxiliary plate laid on and fixed to the actuator base and having a surface support and a side support, the surface support facing a periphery of a surface of the piezoelectric element, the side support facing in the sway direction a side face of the piezoelectric element, an attaching part formed of the actuator base and auxiliary plate, the attaching part being present between the base plate and the load beam and being configured to attach the piezoelectric element thereto, a nonconductive adhesive layer interposed between the attaching part and the piezoelectric element, to adhere the piezoelectric element to the attaching part, and a conductive material configured to electrically connect an electrode plane of the piezoelectric element and the side support to each other. The head suspension is thin and secures conductivity between the electrode plane of the piezoelectric element and the actuator base.

Head suspension and method of manufacturing head suspension

A head suspension has a load beam and a piezoelectric actuator. The piezoelectric actuator has an actuator base connected to a base part of the load beam and a piezoelectric element attached to an opening formed in the actuator base. The piezoelectric actuator displaces a front end of the load beam in a sway direction according to deformation of the piezoelectric element that occurs in response to a voltage applied thereto. The head suspension includes a nonconductive adhesive filled between the piezoelectric element and the opening, to fix the piezoelectric element to the opening and a trap formed on the actuator base outside the opening, to hold the nonconductive adhesive oozing out of the opening and prevent the oozed adhesive from spreading. The trap prevents the oozed adhesive from contaminating the periphery of the opening.

Head suspension

A head suspension for a disk drive has a base () to be attached to a carriage, a load beam () having a rigid part () and a resilient part () supported by the base, to apply load on a data read/write head () arranged at a front end () of the rigid part, and a flexure () attached to the load beam and supporting the head. The rigid part has a multilayer structure consisting of at least three layers including metal layers () and a resin layer () interposed between the metal layers. The number of layers of the resilient part is smaller than that of the rigid part.

Head suspension for disk drive and method of manufacturing head suspension

In a suspension comprising a base portion, beam portion, and a hinge member connecting the base portion and the beam portion to each other, a hole for lowering the stiffness of a region of the beam portion near the hinge member is formed in that region. A cover portion closes the opening of the hole.

Suspension with cover portion comprising part of flexure for disc drive

A suspension for disc drive having a micro actuator mechanism comprises a base plate, a connecting plate having a hinge portion thinner than the base plate, a load beam provided with a flexure, a pair of actuator elements such as PZT, etc. The micro actuator mechanism includes a pivot portion formed between a pair of slits and support walls formed on the connecting plate. The actuator elements are provided individually on the opposite sides of the pivot portion. Each support wall is a bent portion that is formed by raising an edge portion of the connecting plate in the thickness direction of the main portion of the connecting plate.

Suspension for disc drive

A suspension for disc drive comprises a base portion, a beam portion formed of the same material as the base portion and made thinner than the base portion by partial etching, and a hinge member connecting the base portion and the beam portion to each other. In manufacturing this suspension, a platelike semi-finished suspension, which integrally includes a base portion, a beam portion, and a connecting portion connecting the base portion and the beam portion to each other, is first manufactured. The thickness of the beam portion of the semi-finished suspension is reduced by partial etching. Thereafter, the base portion and the beam portion are connected by means of the hinge member, and moreover, the connecting portion is separated from the base portion and the beam portion.

Suspension with separate hinge member for disc drive

A suspension comprises a baseplate having a boss portion, a beam portion with a flexure, and a hinge member. The hinge member includes a connecting portion that can bend in the thickness direction thereof between the baseplate and the beam portion. If the length of the suspension from a pivot portion on the distal end portion of the beam portion to the center of the boss portion is 14.5 mm, the thickness of the baseplate is 0.175 mm or greater, the width of the baseplate is 4.5 mm or greater, the length of the connecting portion of the hinge member is 0.7 mm or shorter, and the length of the baseplate is 5.04 mm or shorter.

A suspension includes a load beam and a base plate. The load beam includes a beam body fixedly fitted with a flexure for supporting a head portion, a proximal portion fixedly fitted with the base plate, and a hinge portion connecting the beam body and the proximal portion. The hinge portion is formed on a part of a platelike spring member. The base plate includes a ring-shaped flange portion and a boss portion in the form of a short cylinder. The proximal portion of the load beam is bored with a circular hole having an inside diameter corresponding to the outside diameter of the base plate. The flange portion of the round base plate can be fitted in the hole.

Suspension for disk drive

A suspension for a disc drive includes a load beam, a flexure that is attached to the load beam and that has a tongue portion as a moving part, and a limiter member that is attached to the flexure and that is used to restrain the angle of inclination of the tongue portion. The flexure includes a pair of outrigger portions, left and right, and the tongue portion is situated between the outrigger portions. The tongue portion carries a head thereon. The limiter member includes arms, detachedly facing the outrigger portions of the flexure in the thickness direction thereof in order to control the angle inclination of the tongue portion, and a front edge portion detachedly facing the rear end portion of the tongue portion in the thickness direction thereof.

Suspension for disc drive that is capable of restraining excessive inclination of a head or occurrence of dimple separation when it is shocked, without enhancing the stiffness of a flexure

A suspension for disk drive, comprising a load beam having a proximal end portion fitted with a base plate, a distal end portion fitted with a flexure, and bent edges formed individually on the opposite sides thereof, the load beam being gradually tapered from the proximal end portion toward the distal end portion, a support projection interposed between the load beam and the flexure, and a flexible portion of the load beam defined in a region between the support projection and the base plate. Openings are formed in an inner portion of a second region between the center of gravity of the flexible portion and the base plate, inside the bent edges, so that K.sub.Lb /K.sub.SP is 2 or more, where K.sub.Lb is a spring constant for a first region between the center of gravity of the flexible portion and the support projection and K.sub.SP is a spring constant for the second region, the area of the openings accounting for 25% or more of the area of the inner portion.

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Yokohama, Japan

Osamu Iriuchijima