JP3925483B2 - Magnetic head device - Google Patents

Description

  The present invention relates to a magnetic head device used in a magneto-optical recording / reproducing apparatus that uses a magneto-optical recording medium such as a magneto-optical disk as a recording medium, and more particularly to a magnetic head that slides on a magneto-optical recording medium on which an information signal is recorded. The present invention relates to a magnetic head device provided.

  2. Description of the Related Art Conventionally, a magneto-optical disk recording / reproducing apparatus that uses, as a recording medium, a magneto-optical disk in which a magneto-optical recording layer made of a perpendicular magnetization film is provided on a transparent substrate having optical transparency has been used.

  In this magneto-optical disk recording / reproducing apparatus, an optical pickup device that emits a light beam applied to a magneto-optical recording layer is arranged oppositely on one surface side of a magneto-optical disk that is rotated by a disk rotation driving mechanism. A magnetic head device for applying an external magnetic field to the magneto-optical recording layer is disposed opposite to the other surface side of the magnetic disk.

  A magneto-optical disk recording / reproducing apparatus applies a magnetic field whose magnetic field direction is modulated in accordance with an information signal to be recorded from a magnetic head device to a magneto-optical recording layer of a magneto-optical disk to be rotated. The light beam emitted from is condensed and irradiated. Then, after the portion that has been heated to the Curie temperature or more and disappeared from the coercive force by being irradiated with the light beam is magnetized according to the direction of the magnetic field applied from the magnetic head device, the light is rotated by the rotation of the magneto-optical disk. The information signal is recorded by fixing the direction of the magnetization by lowering the temperature below the Curie temperature by the relative movement of the beam.

  By the way, the conventional magneto-optical disk recording / reproducing apparatus opposes the magneto-optical disk to be rotated at a predetermined interval without contacting the magnetic head when the information signal is recorded. This is to prevent damage to the magneto-optical disk due to the sliding contact of a metal core such as ferrite constituting the magnetic head.

  Therefore, in the conventional magnetic head device, the magnetic head does not come into contact with the magneto-optical disk even when the magneto-optical disk is warped or uneven in thickness, so that even when the magneto-optical disk is rotated and the surface is shaken. In order to maintain a constant interval, an electromagnetic control mechanism is provided for displacing the magnetic head following the surface deflection of the magneto-optical disk.

  Thus, in the magnetic head device provided with the electromagnetic control mechanism for keeping the distance between the magnetic head and the magneto-optical disk constant, electric power for driving the electromagnetic control mechanism is necessary, and power consumption Will increase. In addition, a detection mechanism for detecting the distance between the magnetic head and the magneto-optical disk is also required, which not only complicates the mechanism for controlling the magnetic head device, but also complicates the configuration of the recording / reproducing device, and reduces the size of the device itself. It is very difficult to reduce the thickness and thickness.

  Therefore, instead of the magnetic head device that controls the magnetic head to face the magneto-optical disk having a possibility of causing surface runout by rotation, the magnetic head is attached to the magneto-optical disk. A magneto-optical recording / reproducing apparatus including a magnetic head device that records an information signal in a sliding state has been proposed.

  A magnetic head device used in this type of magneto-optical disk recording / reproducing apparatus is a magnetic head element comprising a bobbin in which a magnetic core and a coil are attached to a sliding contact body which is in sliding contact with the main surface of a rotating magneto-optical disk. Is installed. The sliding contact body to which the magnetic head element is attached is supported on the tip end side of the head support arm via a support portion that can be elastically displaced. When the magneto-optical disk is rotated while the sliding contact body is in sliding contact with the magneto-optical disk, the support section is elastically displaceable even when the magneto-optical disk generates surface runout. The sliding contact body is controlled to slide in contact with the magneto-optical disk while maintaining a constant sliding contact posture by elastic displacement of the disk.

  The head support arm moves the sliding contact body, to which the magnetic head element is attached, to and away from the magneto-optical disk, and also makes the sliding contact body come into sliding contact with the magneto-optical disk with a certain sliding contact pressure. It is formed with the leaf | plate spring which has. That is, the head support arm is rotationally operated by a rotational operation member provided on the magneto-optical disk recording / reproducing apparatus side to be elastically displaced to bring the sliding contact body into contact with and away from the magneto-optical disk. Further, the head support arm is formed so as to be elastically displaced when the sliding contact body comes into sliding contact with the magneto-optical disk and to bias the sliding contact body toward the magneto-optical disk side.

  Further, the support portion that supports the sliding contact body on the tip end side of the head support arm so as to be elastically displaceable includes a pair of support arms that support opposite sides of the sliding contact body, and the sliding support body is slid through the pair of support arms. By supporting the contact body, the sliding contact body is elastically displaced so as to rotate in a direction orthogonal to the elastic displacement direction of the head support arm with the pair of support arms as the center. In other words, the support portion including the pair of support arms supports the sliding contact body so as to swing and displace on the main surface of the magneto-optical disk. The pair of support arms have an elastic force sufficiently smaller than the elastic force of the support arm so that the sliding contact body can be easily displaced following the surface vibration of the magneto-optical disk to be rotated. It has been.

  And a pair of support arms which comprise the support part of a sliding contact body are formed by punching the front end side of the head support arm formed with the leaf | plate spring.

  The head support arm that supports the sliding contact body on the distal end side is attached with the base end fixed to the head mounting arm, and is attached to the mounting base provided in the magneto-optical recording / reproducing apparatus via the head mounting arm. . Therefore, the head support arm is supported by the head mounting arm with a cantilever support structure in which the base end portion is fixed, and contacts and separates from the magneto-optical disk with the base end side fixed to the head support arm as the center. Elastically displaced in the direction.

  As described above, a magnetic head device in which an information signal is recorded by sliding a sliding contact body having a magnetic head element attached to a rotating magneto-optical disk, the sliding contact body is attached to the magneto-optical disk. A head support arm that supports the slidable contact member is formed by a leaf spring so as to be brought into and out of contact with the magneto-optical disk that is rotated and operated with a constant slidable contact pressure.

  The head support arm applies an urging force to the sliding contact body so that the sliding contact body is in sliding contact with the magneto-optical disk that is rotated with a constant sliding contact pressure. The urging force for urging the sliding contact body toward the magneto-optical disk is slid to the magneto-optical disk with a constant sliding contact pressure without significantly rising from the main surface of the magneto-optical disk on which the sliding contact body is rotated. Things are enough. If the urging force for sliding the sliding contact body on the magneto-optical disk is too large, the sliding friction between the sliding contact body and the magneto-optical disk increases, and the sliding contact body and the magneto-optical disk are significantly worn. . Therefore, the head support arm is formed by a thin plate spring such as thin phosphor bronze that does not have sufficient mechanical strength and does not have a large elastic force. Further, as described above, the head support arm is attached to the head attachment arm with a cantilever support structure in which the base end portion is fixed.

  In the magnetic head device having such a configuration, when an impact is applied, the head support arm formed by a thin leaf spring that is not sufficiently mechanically mechanically supported and cantilevered has an elastic limit. A load exceeding 1 is easily applied, and deformation is easily caused. In particular, when an impact is applied to the head support arm, the load is concentrated on the base end side fixed to the head mounting arm, and the deformation at the base end side portion is remarkable.

  Such an easy deformation when subjected to an impact similarly occurs even when the magnetic head device is attached to the magneto-optical recording / reproducing apparatus. That is, when an impact such as a drop impact is applied to the magneto-optical recording / reproducing apparatus itself, the impact is transmitted to the magnetic head device, causing easy deformation of the head support arm.

  Therefore, the present invention can easily provide an elastic displacement portion that supports the sliding contact body with the magnetic head element attached thereto so as to be elastically displaceable in the direction of contact with and away from the magneto-optical recording medium even when an impact is applied. An object of the present invention is to provide a magnetic head device that is not deformed and has sufficient durability.

  Further, the present invention makes it possible to form the elastic displacement portion that supports the sliding contact body that is in sliding contact with the magneto-optical recording medium by a thin leaf spring having insufficient mechanical strength. It is an object of the present invention to provide a magnetic head device capable of preventing the recording medium from being significantly worn and protecting the sliding contact body and the magneto-optical recording medium.

  It is another object of the present invention to provide a magnetic head device capable of simplifying a mechanism for bringing a sliding contact body into and out of contact with a magneto-optical recording medium.

  A magnetic head device according to the present invention is formed by molding a magnetic head element comprising a magnetic core and a bobbin to which a coil is attached, and a synthetic resin to which the magnetic head element is attached and in sliding contact with the magneto-optical recording medium. The formed sliding contact body is integrally formed with a synthetic resin fixing portion on the base end side, and the sliding contact body is integrally formed on the distal end side and electrically connected to the coil. A portion of the elastic body facing outwardly between the at least one pair of elastic bodies having the property and the fixed portion to form the first elastic displacement portion, and between the sliding contact body A part of the elastic body is exposed outward to form a second elastic displacement portion, and the synthetic resin is formed integrally with the elastic body, positioned between the fixed portion and the sliding contact body. And a head support formed above and above the first elastic displacement portion. A weight body located on the fixed portion side and provided integrally with the head support body, and provided integrally with the weight body, and pivoting the head support body around the first elastic displacement portion. A rotation operation unit and an extension from the fixed unit, the rotation operation unit is rotated, and the head support is a magneto-optical element of the sliding contact body around the first elastic displacement unit. A rotation attitude regulating arm that abuts a part of the sliding contact body and regulates the rotation attitude of the sliding contact body when operated to rotate upward facing the sliding contact surface to the disk; It becomes.

  Further, in the magnetic head device according to the present invention, when a part of the sliding contact body abuts on the rotation posture restriction arm and the rotation of the head support is restricted, the rotation posture restriction arm and the above The head support is substantially parallel to the head support.

  In the magnetic head device according to the present invention, the weight body extends on one side of the elastic body, and the rotation posture restricting arm extends on the other side of the elastic body.

  The head support of the magnetic head device according to the present invention is rotated around the first elastic displacement portion formed by the elastic body, and the sliding contact body integrally provided on the distal end side of the elastic body is light. It is in contact with and separated from the magnetic recording medium.

  The sliding contact body to which the magnetic head element is attached is rotationally displaced about the second elastic displacement portion, so that the sliding contact posture is controlled to make relative sliding contact with the magneto-optical recording medium.

  Then, a head support that supports the sliding contact body is extended on one side via the second elastic displacement portion with the first elastic displacement portion as a center, and the head support body is integrated on the other side. Since the weight body is extended, the integral head support body and the center of gravity of the weight body can be positioned at the first elastic displacement portion. Since the first elastic displacement portion is located at or near the center of gravity of the integral head support and weight body, when an impact is applied to the magnetic head device, the inertia moment on the head support side and the weight side The moment of inertia balances around the vicinity of the first elastic displacement portion, and a large displacement of the first elastic displacement portion is restricted.

  In addition, when the rotation operation unit is rotated and the head support is rotated about the first elastic displacement portion, a part of the sliding contact supported on the tip side of the head support is The rotation attitude of the sliding contact body is regulated by coming into contact with the rotation attitude regulation arm. When the sliding contact body abuts on the rotation posture restriction arm and the rotation of the head support member is restricted, the head support member and the rotation posture restriction arm are substantially parallel.

  In the magnetic head device according to the present invention, a head support body that supports a sliding contact body is extended on one side through a second elastic displacement portion with the first elastic displacement portion as a center, and the other side. Since the weight body integrated with the head support is extended to the center, the center of gravity of the head support and the weight body can be positioned at the first elastic displacement portion. Further, the rotation operation unit is rotated, and the head support body of the sliding contact body supported on the front end side of the head support body via the second elastic displacement section with the first elastic displacement section as the center. There is provided a rotation posture regulating arm that contacts a part of the sliding contact body and regulates the rotation posture of the sliding contact body when operated to rotate upward facing the sliding contact surface to the magneto-optical disk. Therefore, the rotational posture of the sliding contact supported on the tip end side of the head support via the second elastic displacement portion can be regulated so as to be parallel to the head support. A large space can be formed between the magneto-optical disk.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the magnetic head device 1 according to the present invention includes a pair of long elastic bodies 2 and 2 having conductivity and arranged substantially parallel to each other. These elastic bodies 2 and 2 are formed by punching a thin metal plate having conductivity such as phosphor bronze or BeCu. In particular, the elastic bodies 2 and 2 are formed of an age-hardening material such as BeCu whose degree of hardening changes according to the heat treatment time. By forming the elastic bodies 2 and 2 on the age-hardening material, the elastic force of the elastic bodies 2 and 2 can be easily made desired.

  On the distal end side of these elastic bodies 2, 2, a power supply terminal that is electrically connected to a coil of a magnetic head element attached to the sliding contact body is provided as will be described later, and on the proximal end side, described later. As described above, a terminal portion constituting an external circuit connection portion to which an external connection cable for supplying power to the coil of the magnetic head element is connected is provided.

  As shown in FIGS. 1, 2, 3, and 4, the magnetic head device 1 according to the present invention is disposed in the magneto-optical recording / reproducing apparatus on the base end side of the pair of elastic bodies 2, 2. A fixing portion 3 for mounting on the mounting base is integrally formed by molding a synthetic resin material. Further, the sliding contact body 5 constituting the magnetic head 10 is made of a synthetic resin material by attaching a magnetic head element 4 composed of a magnetic core and a bobbin to which a coil is attached to the distal ends of the pair of elastic bodies 2 and 2. It is integrally formed by molding. Further, a head support 6 molds a synthetic resin material between a base end portion where the fixing portions 3 of the pair of elastic bodies 2 and 2 are provided and a tip end portion where the sliding contact body 5 is provided. It is provided integrally.

  Meanwhile, the head support 6 has a part of the pair of elastic bodies 2, 2 facing outward between the fixed portion 3 and one of the pair of elastic bodies 2, 2 between the sliding contact body 5. It is integrally provided in the middle part of the pair of elastic bodies 2 and 2 so that the part faces outward. The portion of the pair of elastic bodies 2 and 2 facing outwardly between the fixed portion 3 and the head support 6 is in a direction in which the head support 6 including the sliding contact 5 is brought into contact with and separated from the magneto-optical disk. The first elastic displacement portions 7 and 7 are used as a rotation center when the rotation operation is performed. Further, the portion of the pair of elastic bodies 2 and 2 facing outwardly between the sliding contact body 5 and the head support body 6 is a magneto-optical device in which the sliding contact body 5 to which the magnetic head element 4 is attached is rotated. The second elastic displacement portions 8 and 8 are elastically displaced so as to swing and displace following the surface vibration of the disk.

  And the part which comprises the 2nd elastic displacement part 8 of a pair of elastic bodies 2 and 2 is made narrower than the part which comprises the 1st elastic displacement part 7, and the 1st elastic displacement part 7 and 7, it is formed so as to be easily elastically displaced by a slight load. That is, the first elastic displacement portions 7 and 7 apply a biasing force to the head support 6 so that the slide contact 5 is slidably contacted with the magneto-optical disk on which the slidable contact 5 is rotated with a constant sliding contact pressure. Therefore, even when a surface shake or the like is caused in the rotationally operated magneto-optical disk, the elastic force sufficient to apply an urging force to the head support 6 so that the sliding contact body 5 does not float from the magneto-optical disk. is required. On the other hand, the second elastic displacement portions 8 and 8 are provided on the magneto-optical disk even when a surface shake or the like occurs on the magneto-optical disk in a state where the sliding contact body 5 is in sliding contact with the magneto-optical disk. Following the rotation, the sliding contact body 5 is oscillated and displaced so as to maintain a constant sliding contact posture. Therefore, the elastic force of the second elastic displacement portions 8 and 8 is smaller than the elastic force of the first elastic displacement portions 7 and 7.

  Here, the sliding contact body 5 provided integrally on the tip side of the pair of elastic bodies 2 and 2 will be specifically described. The sliding contact body 5 is a magnetic head including a magnetic core and a bobbin to which a coil is attached. An element 4 is attached to constitute a magnetic head 10. The magnetic head device 1 is attached to a magneto-optical recording / reproducing device, and when an information signal is recorded on the magneto-optical disc, one of the magneto-optical discs that are rotated The magnetic head element 4 is in sliding contact with the main surface so as to maintain a certain distance from the signal recording layer of the magneto-optical disk.

  As shown in FIG. 5, the magnetic head element 4 which is attached to the sliding contact body 5 and constitutes the magnetic head 10 includes a magnetic core 32 formed of a magnetic material such as ferrite and a bobbin 34 around which a coil 33 is wound. It consists of. The magnetic core 32 has a central magnetic pole core 32a, a pair of side magnetic pole cores 32 and 32b provided on both sides of the central magnetic pole core 32a, and a connecting portion 32c that connects the base end sides of the magnetic pole cores 32a, 32b, and 32b. However, it is formed in a substantially E shape as a whole. The central magnetic pole core 32a of the magnetic core 32 is formed to be longer than the side magnetic pole cores 32b and 32b so that the front end portions often protrude from the front end portions of the side magnetic pole cores 32b and 32b.

  The bobbin 34 constituting the magnetic head element 4 together with the magnetic core 32 is formed by molding a synthetic resin material such as liquid crystal polymer or polyphenylene sulfide that can be molded with extremely high precision. 5, 6, 7 and 8, a bobbin main body 38 having an insertion hole 37 at the center for insertion of the central magnetic pole core 32a of the magnetic core 32 is provided. On the outer peripheral side of the bobbin main body 38, a coil winding portion 39 formed in a concave shape so as to surround the insertion hole 37 is provided. On one end side of the bobbin main body 38, a flange portion 40 protruding in a direction orthogonal to the axial direction of the insertion hole 37 is integrally formed. The end face 40a of the flange portion 40 is on the side in contact with the magneto-optical disk. Therefore, as shown in FIGS. 6 and 7, the end surface 40a of the flange portion 40 can smoothly come into sliding contact with the magneto-optical disk even when it contacts the main surface of the rotating magneto-optical disk. Therefore, it is formed as a curved surface that bulges out the central portion.

  As shown in FIGS. 7 and 8, a pair of support portions 42, 42 that support a pair of coil connection terminals 41, 41 formed of a conductive material such as phosphor bronze are provided on the other end side of the bobbin body 38. Projected. These support portions 42, 42 are provided to project in parallel to face each other in a direction orthogonal to the axial direction of the insertion hole 37. The pair of coil connection terminals 41 and 41 are integrally attached so that both end portions protrude from the support portions 42 and 42 and are embedded in the support portions 42 and 42.

  By the way, the pair of coil connection terminals 41 and 41 are arranged in the mold when the bobbin 34 is molded by the mold apparatus, and are integrally attached simultaneously with the molding of the support portions 42 and 42. It is attached to the support parts 42, 42 by molding.

  One end protruding from the support portions 42, 42 of the coil connection terminals 41, 41 is used as a coil connection portion 41a around which the connection terminal 33a of the coil 33 wound around the coil winding portion 39 is wound and connected. The other end portion is used as a connection terminal portion 41b that is in electrical contact with a power supply terminal that is provided integrally with a sliding contact body 5 to be described later.

  And the connection terminal 33a of the coil 33 wound around the coil winding part 39 of the bobbin 34 is wound several times around the coil connection part 41a of the coil connection terminals 41 and 41 as shown in FIG. Connected to. In order to achieve reliable electrical connection between the connection terminal 33a of the coil 33 and the coil connection part 41a, the connection terminal 33a is connected to the coil connection part 41a using a conductive adhesive or solder.

  A concave portion formed by projecting a pair of support portions 42 and 42 on the other end side of the bobbin main body 38 is a fitting portion 43 of the magnetic core 32. At both ends of the fitting portion 43, core support portions 44, 44 that support the magnetic pole core 32 that is attached by inserting the central magnetic pole core 32 a into the insertion hole 37 are formed. As shown in FIG. 6, the core support portions 44, 44 are provided with a pair of slits 45, 45 on both sides, so that the distal end side is elastically displaced with the connecting portion side to the bobbin body 38 as a fulcrum. Made possible. That is, the core support portions 44, 44 are pressed by the connecting portion 32c of the magnetic pole core 32 and elastically deformed when the magnetic pole core 32 that does not have sufficient machining accuracy is attached to the bobbin 34, thereby causing the central magnetic pole The insertion direction of the center magnetic pole core 32a is regulated so that the core 32a can be reliably inserted into the insertion hole 37.

  Further, when the bobbin 34 is attached to one side of the upper end side of the support portions 42 and 42 so as to be fitted into the attachment hole 46 of the magnetic head element 4 provided in the sliding contact body 5, the inside of the attachment hole 46. Engagement claw pieces 48 and 48 are provided as engaging portions that are relatively engaged with the engaging stepped portion 47 that is the provided engaged portion. As shown in FIGS. 6 and 7, these engaging claw pieces 48 and 48 are formed by extending in the axial direction of the insertion hole 37 provided in the bobbin 34, and claw portions 48a and 48a are formed on one side of the distal end side. It is protruding. The claw portions 48a and 48a are formed at acute angles that taper toward the tip side.

  As shown in FIGS. 5, 9, 10, and 11, the sliding contact body 5 to which the magnetic core 32 and the bobbin 34 constituting the magnetic head element 4 are attached is made of a synthetic resin material such as non-conductive liquid crystal polyester. It is formed by molding, and has a mounting portion 51 of the magnetic head element 4 at the center, and a sliding contact portion 52 that slides from one end side of the mounting portion 51 to the main surface of the magneto-optical disk. It is protruding. When the sliding contact body 5 is rotated in a direction away from the magneto-optical disk together with the head support body 6 on the distal end side opposite to the base end side where the sliding contact section 52 is projected, as will be described later. A contact portion 53 for restricting the rotation posture with respect to the head support body 6 of the sliding contact body 5 that rotates and displaces around the second elastic displacement portions 8 and 8 in contact with the rotation posture restriction arm is provided. ing.

  As shown in FIG. 9, the sliding contact portion 52 is located on the opening end side of the attachment hole 46 provided in the attachment portion 51 and protrudes from one end of the attachment portion 52. As shown in FIG. 12, when the magnetic head 10 is slidably contacted on the magneto-optical disk, the sliding surface 56 moves on the magneto-optical disk. An inclined surface 56a is provided on the direction side. By providing the inclined surface 56a, it is possible to ensure smooth sliding contact when the inclined surface 56 moves while sliding on the magneto-optical disk to be rotated. As shown in FIG. 10, the slidable contact portion 52 is formed so that the slidable contact surface 56 protrudes frequently from the surface of the mounting portion 52 facing the main surface of the magneto-optical disk. It is made to slidably contact the surface.

  The mounting portion 51 provided in the sliding contact body 5 is provided with a mounting hole 46 that is mounted so that the magnetic core 32 and the bobbin 34 are fitted. The mounting hole 46 is formed in a concave shape having a bottom with an opening 46a on the surface side in sliding contact with the magneto-optical disk. As shown in FIGS. 9 and 11, side magnetic pole cores 32 b and 32 b provided on both sides of the magnetic core 32 inserted into the mounting hole 46 are held on the opposing surfaces in the longitudinal direction of the mounting hole 46. A pair of first and second gripping pieces 57, 57 and 58, 58 are provided so as to project. These holding pieces 57, 57 and 58, 58 are provided so as to protrude from the opposing surfaces in the longitudinal direction of the mounting hole 46 so as to oppose each other. The distance between each pair of holding pieces 57, 57 and 58, 58 is made narrower than the thickness of the magnetic core 32, and the side pole core of the magnetic core 32 inserted into these holding pieces 57, 57 and 58, 58. 32b and 32b are clamped and held.

  Further, on the opposing surfaces in the longitudinal direction perpendicular to the surfaces on which the first and second holding pieces 57, 57 and 58, 58 of the mounting hole 46 project, as shown in FIGS. Engagement stepped portions 47 and 47 are provided as engaged portions with which the engaging claws 48a and 48a of the engaging claw pieces 48 and 48 provided on the bobbin 34 inserted into the mounting hole 46 are relatively engaged. It has been. As shown in FIG. 10, these engaging stepped portions 47, 47 are formed on the opposite surfaces in the longitudinal direction of the mounting hole 46, from the upper surface side of the sliding contact body 5 on the bottom 46 a side of the mounting hole 46 to the middle portion. It is formed in the upper end surface part of the elastic displacement pieces 60 and 60 formed by making the cut grooves 59 and 59 which make U-shape over. That is, the engagement step portions 47 and 47 are formed by the cut grooves 59 and 59 formed in the opposing surfaces in the longitudinal direction of the mounting hole 46, and part of the cut grooves 59 and 59. It is configured with. The surfaces of the engaging stepped portions 47, 47 formed by a part of the cut grooves 59, 59 that engage with the engaging claws 48a, 48a are sharp surfaces corresponding to the engaging claws 48a, 48a. Yes.

  In order to form the engagement step portions 47 and 47, the upper end side where the engagement step portions 47 and 47 of the elastic displacement pieces 60 and 60 formed by drilling the cut grooves 59 and 59 are formed is shown in FIG. As shown in FIG. 4, the mounting hole 46 is inclined so as to protrude inward. The inclined surfaces of the elastic displacement pieces 60, 60 facing each other are in contact with a part of the outer peripheral portion of the bobbin 34 inserted into the mounting hole 46, and guide the insertion direction and insertion position of the bobbin 34. Insertion guide portions 62 and 62 are provided.

  In addition, in the mounting hole 46, power supply terminals 63, 63 formed by bending the tip ends of the pair of conductive elastic bodies 2, 2 project. These power supply terminals 63 and 63 are in electrical contact with the connection terminal portions 41 b and 41 b of the coil connection terminals 41 and 41 provided on the bobbin 34 inserted into the mounting hole 46, and are coils wound around the bobbin 34. 33, when the bobbin 34 is attached to the attachment hole 46, it is provided at a position where it can contact the connection terminal portions 41b and 41b of the coil connection terminals 41 and 41 attached to the bobbin 34. As shown in FIG. 11, the second holding pieces 58, 58 are located on the projecting side, and projecting on the opposite side surfaces of the mounting hole 46.

  A power supply terminal 63 formed by bending the distal ends of the pair of elastic bodies 2 and 2 is bent so as to protrude into the mounting hole 46 and to elastically contact the coil connection terminals 41 and 41 as shown in FIG. A portion 64 and a mounting portion 65 on which the sliding contact body 5 made of synthetic resin is molded are provided. The bent portion 64 of the power supply terminal 63 is bent so as to bulge out at the central portion, and the bulged portion serves as an electrical contact portion 64 a to the coil connection terminal 41. The bent portion 64 is bent from one end of the attachment portion 65 along the direction in which the bobbin 34 is inserted into the attachment hole 46.

  The attachment portions 65, 65 of the pair of power supply terminals 63, 63 protrude to the side near the center of gravity of the sliding contact body 5, and are continuous with the second elastic displacement portions 8, 8. Therefore, the sliding contact body 5 is supported by the pair of elastic bodies 2 and 2 in the vicinity of the center of gravity.

  By the way, in order to reduce the electrical resistance at the time of contact, at least the coil connection terminals 41, 41 of the power supply terminal 63 is subjected to any one of gold plating treatment, nickel plating treatment, and solder plating treatment. It has been subjected. As a material used for the plating process, it is desirable to use a material having an electric resistance smaller than that of the feeding terminal 63 in order to reduce an electric resistance at the time of contact.

  Similarly, in order to reduce the electrical resistance at the time of contact, the connection terminal portions 41b and 41b that are in contact with the bent portions 64 of the coil connection terminals 41 and 41 are also subjected to any of gold plating treatment, nickel plating treatment, and solder plating treatment. It is desirable to perform plating treatment.

  Further, as shown in FIG. 13, the tip surface of the central magnetic pole core 32a of the magnetic core 32 attached to the attachment hole 46 contacts the bottom surface 46b of the attachment hole 46, that is, the inner surface of the sliding contact body 5 on the top plate side. Thus, a magnetic core abutting portion 67 for restricting the mounting position of the magnetic core 32 with respect to the mounting hole 46 is formed to bulge.

  Next, a process of assembling the magnetic head 10 configured as described above will be described, and further, the assembled magnetic head 10 will be described.

  In order to assemble the magnetic head 10, the magnetic core 32 is attached in the mounting hole 46 of the sliding contact body 5. As shown in FIG. 15, the magnetic core 32 is inserted into the mounting hole 46 from the opening end 46a opened on the sliding contact surface side of the sliding contact body 5 to the magneto-optical disk, with the connecting portion 32c side as the insertion end. . The magnetic core 32 inserted into the mounting hole 46 is held between the first and second holding pieces 57, 57 and 58, 58 by fitting both side portions on the side magnetic pole cores 32b, 32b side. It is clamped by the pieces 57, 57 and 58, 58 and temporarily fixed in the mounting hole 46. At this time, in the magnetic core 32, the upper surface of the connecting portion 32c is brought into contact with the magnetic core abutting portion 67, and the position restriction in the insertion direction into the mounting hole 46 is achieved.

  Next, the bobbin 34 around which the coil 33 is wound is inserted into the mounting hole 46 in which the magnetic core 32 is disposed. The bobbin 34 corresponds to the surface of the mounting hole 46 where the engagement step portions 47, 47 are provided on the side where the engagement claw pieces 48, 48 project, and the connection terminal portions 41b, 41b of the coil connection terminals 41, 41 are provided. 41b is inserted into the mounting hole 46 from the opening end 51a so as to correspond to the power supply terminals 63 and 63 protruding from the mounting hole 46. At this time, the central magnetic pole core 32 a of the magnetic core 32 is inserted into the insertion hole 37 of the bobbin 34. Further, when the bobbin 34 is inserted into the mounting hole 46, the bobbin 34 is coiled into the insertion guide portions 62 and 62 formed on the opposing surfaces of the elastic displacement pieces 60 and 60 protruding into the mounting hole 46. The outer surface on the side where the connection terminals 41 and 41 are attached is slidably contacted and inserted into the attachment hole 46. At this time, the bobbin 34 is inserted into the mounting hole 46 with the outer surface guided by the insertion guide portions 62 and 62, whereby the insertion direction with respect to the mounting hole 46 is restricted. Therefore, the bobbin 34 is inserted into the mounting hole 46 by accurately inserting the central magnetic pole core 32 a of the magnetic core 32 temporarily fixed in the mounting hole 46 into the insertion hole 37.

  Further, when the bobbin 34 is inserted into the mounting hole 46, the elastic displacement pieces 60, 60 are elastically displaced outward from the mounting hole 46 by the engaging claw pieces 48, 48. When the bobbin 34 is further inserted from here and inserted until the insertion end side comes into contact with the bottom surface 51b of the mounting hole 46, the engagement claws 48a and 48a at the tips of the engagement claw pieces 48 and 48 become the elastic displacement pieces 60 and 48, respectively. As shown in FIG. 16, when the elastic displacement pieces 60, 60 are elastically restored by reaching the engagement step portions 47, 47 formed at the tip of the 60, the engagement step portions 47a, 48a and the engagement step portions 47, Relative engagement with 47 is realized. Then, as shown in FIG. 16, the bobbin 34 is positioned in the mounting hole 46 with the flange portion 40 bulging and forming the central portion of the end surface 40a facing the surface of the sliding contact 5 facing the magneto-optical disk. Installed.

  Further, when the bobbin 34 is mounted in the mounting hole 46, the connection terminal portions 41b of the coil connection terminals 41 and 41 are brought into pressure contact with the power supply terminals 63 and 63 protruding into the mounting hole 46, and the electrical connection is illustrated. It is done. Since these power supply terminals 63 and 63 are formed by contacting the connecting terminal portions 41b and 41b with the bent portions 64 and 64 that protrude greatly into the elastic mounting hole 46, an elastic force is applied to the connecting terminal portion 41b. Press contact and reliable electrical contact are realized.

  Since the power supply terminals 63 and 63 are provided with bent portions 64 and 64 in the middle and are formed in a substantially square shape, when the connection terminal portions 41 b and 41 b come into contact with each other, the tip end side is the attachment hole 56. Since it comes into contact with the inner surface, a large elastic force can be applied to the connection terminal 41b.

  The magnetic head 10 assembled as described above is assembled simply by sequentially inserting the bobbin 34 around which the magnetic core 32 and the coil 33 are wound into the mounting hole 46, and the magnetic core 32 and the coil 33 are fixed to the sliding contact body 5. Since it is not necessary to use an adhesive to do so, the assembly is extremely easy. Further, the mounting position of the magnetic head element 4 with respect to the sliding contact body 5 can be determined by the relative engagement position between the engaging claws 48a and 48a and the engaging stepped portions 47 and 47, so that the positioning of the mounting position can be accurately performed. It can be done easily.

  Further, no solder or the like is required for the connection between the coil connection terminals 41 and 41 provided on the bobbin 34 and the power supply terminals 63 and 63. Therefore, the assembly work of the magnetic head 10 is extremely simplified.

  The head support 6 that supports the magnetic head 10 configured as described above on the distal end side via the second elastic piece portions 8 and 8 is formed by molding synthetic resin between the pair of elastic bodies 2 and 2. Formed. The head support 6 is formed by molding a synthetic resin between the pair of elastic bodies 2 and 2, thereby fixing the positions of the pair of elastic bodies 2 and 2 and the elastic bodies 2. , 2 is provided with rigidity, and the sliding contact body 5 constituting the magnetic head 10 attached to the tips of the elastic bodies 2, 2 is supported so as to be rotatable and displaceable around the second displacement portions 8, 8. is there. On the side of the head support 6 on which the slidable contact body 5 is supported, as shown in FIGS. 1, 2 and 3, a recess 75 facing the slidable contact portion 52 side of the slidable contact body 5 is formed. When the sliding contact body 5 is rotationally displaced about the second elastic displacement portions 8 and 8, the sliding contact body 5 is rotationally displaced so that the sliding contact portion 52 side enters the recess 75 of the head support body 6.

  Further, on one side of the base end side located on the fixed portion 3 side of the head support 6, the head support 6 is extended toward the fixed portion 6 as shown in FIGS. 1, 2, 3, and 4. A connecting arm 76 is provided, and a weight body 77 is provided on the distal end side of the connecting arm 76. In the weight body 77, the center of gravity of the head support body 6 supported by the fixed portion 3 via the first elastic displacement portions 7 and 7 constituted by a part of the pair of elastic bodies 2 and 2 has a first elasticity. The head support 6 is extended on one side with the first elastic displacement portions 7 and 7 as the center and the tip on the other side. The connecting arm 76 provided with the weight body 77 is extended. Accordingly, the weight body 77 is provided on the fixed portion 3 side from the first elastic displacement portions 7 and 7.

  In the present embodiment, the weight portion 77 is integrally formed with the head support 6 together with the connecting arm 76 and is formed of the same synthetic resin material as the head support 6. However, in order to earn a large weight with a small volume. Alternatively, a metal material having a large specific gravity may be used. The weight body 77 made of a metal material is integrally attached by being inserted into the connecting arm 76 when the connecting arm 76 made of a synthetic resin is formed. Further, the weight body 77 may be formed by embedding a metal material having a large specific gravity in a synthetic resin body molded integrally with the connecting arm 76.

  The weight body 77 extended via the connecting arm 76 on the other side opposite to the one side on which the head support 6 is extended with the first elastic displacement portions 7 and 7 as the center is the first elastic displacement. It also functions as a turning operation part for turning the head support 6 around the parts 7 and 7. That is, when the weight body 77 is pressed, the first elastic displacement portions 7 and 7 are elastically displaced, so that the head support 6 is rotated about the first elastic displacement portions 7 and 7. The

  Therefore, as shown in FIG. 1, when the magnetic head device 1 is attached to the magneto-optical recording / reproducing apparatus, the weight 77 is pressed by a head rotating operation unit provided on the magneto-optical recording / reproducing apparatus side. A pressed part 78 is provided to be operated. Even when the weight body 77 is rotated in a direction in which the weight body 77 is pushed down around the first elastic displacement portions 7 and 7, the pressed portion 78 is surely pressed by the head rotation operation portion. Therefore, the inclined surface 78 a is provided on the upper surface side so that the height gradually increases toward the rear end side of the weight body 77.

  Further, the fixing portion 3 provided on the base end side of the pair of elastic bodies 2 and 2 is attached so as to move in the radial direction of the magneto-optical disk in synchronization with the optical pickup device disposed in the magneto-optical recording / reproducing apparatus. Fixing and supporting the magnetic head device 1 on a base, as shown in FIGS. 2 and 3, through which a fixing member such as a fixing screw fixed to the mounting base is inserted at the center. A member insertion hole 79 is formed. Further, as shown in FIG. 2, an engagement hole 80 and an engagement recess 81 that are engaged with a pair of positioning pins protruding from the mounting base are formed on the bottom surface side of the fixed portion 3.

  Further, as shown in FIGS. 2 and 3, the weight body 77 including the head support body 6 is pressed on the side surface of the fixed portion 3 facing the weight body 77, as shown in FIGS. 2 and 3. A rotation restricting portion 82 that restricts the rotation range of the weight body 77 when the displacement portions 7 and 7 are rotated is provided. When the weight body 77 is rotated, the rotation restricting portion 82 is brought into contact with a surface of the weight body 77 that faces the fixing portion 3 and a rotation restricting projection 83 that protrudes as shown in FIG. The rotation of the weight body 77 including the head support 6 around the first elastic displacement portions 7 and 7 is restricted.

  Further, as shown in FIGS. 1 and 3, the head support 6 is extended from the tip on the other side facing the one side where the connecting arm 76 provided with the weight body 77 of the fixed portion 3 is provided on the tip side. A rotation posture restricting arm 84 is provided substantially in parallel with the head support 6 in the direction. As shown in FIGS. 1 and 3, the turning posture regulating arm 84 is a contact portion in which a turning posture regulating portion 85 whose front end side is bent in an L shape protrudes from the sliding contact body 5. 53 are opposed to each other. The rotation posture regulating arm 84 has a head support body 6 including a weight body 77 which is a rotation operation section when the pressed portion 78 is pressed, with the first elastic displacement portions 7 and 7 as the center. 1 and FIG. 4, that is, when it is rotated in the direction of the arrow A, that is, the upper side of the sliding contact body 5 supported at the tip of the head support body 6 is opposed to the sliding contact surface to the magneto-optical disk. Rotation of the sliding contact body 5 that is rotationally displaced about the second elastic displacement portions 8 and 8 with respect to the head support body 5 by bringing the rotational posture restricting portion 85 into contact with the contact portion 53 when operated. Regulate posture.

  By the way, the weight body 77 is extended along one side of the fixed portion 5, and the rotation posture restricting arm 84 is extended from the other side of the fixed portion 5. Are positioned and extended on both sides of the pair of elastic bodies 2, 2, respectively, and the width of the magnetic head device 1 can be reduced.

  As shown in FIG. 17, the magnetic head device 1 having the above-described configuration is attached to a movable base 92 to which an optical pickup device 91 is attached and is movably attached in the magneto-optical recording / reproducing device. It is attached so as to move in synchronization with the optical pickup device 91.

  A moving base 92 to which the magnetic head device 1 and the optical pickup device 91 are attached has a through hole 95 formed in the middle of a slide guide shaft 94 attached to a chassis substrate 93 to which a mechanism portion such as a disk rotation drive mechanism is attached. And a slide guide portion 98 provided on one side of the chassis substrate 93 is supported by a pair of upper and lower engaging pieces 96, 97 projecting from one end side. The magneto-optical disk 100 accommodated in the disk cartridge 99 is supported so as to be movable in the radial direction. The moving base 92 is moved and operated in the radial direction of the magneto-optical disk 100 through a pickup feeding mechanism driven by a drive motor (not shown).

  Then, the optical pickup device 91 condenses the light beam emitted from the light source on the signal recording layer of the magneto-optical disk 100 and irradiates it with the objective lens facing the magneto-optical disk 100 and on the tip side of the moving base 92. Installed on. At this time, the optical pickup device 91 is attached to the movable base 92 so that the optical axis of the objective lens is positioned on the center line of the magneto-optical disk 100.

  An attachment base 101 of the magnetic head device 1 is formed upright on the other end of the moving base 92 opposite to the one end where the optical pickup device 91 is attached. As shown in FIG. 17, the mounting base 101 is formed so as to rise along one side of a disk cartridge 99 mounted on a cartridge mounting portion in the magneto-optical recording / reproducing apparatus. As shown in FIG. 18, the magnetic head device 1 extends the head support 6 on the disk cartridge 99 mounted on the cartridge mounting portion, and attaches the fixing portion 3 to the upper end portion of the mounting base 101. And is attached to the moving base 92. That is, the magnetic head device 1 is mounted on the mounting base 101 by engaging the engaging hole 80 and the engaging recess 81 provided on the bottom surface of the fixing portion 3 with the positioning pin protruding from the upper end surface of the mounting base 101. The position is positioned, and it is attached to the attachment base 101 by a fixing screw that is inserted into the fixing member insertion hole 79 and screwed into the attachment base 101.

  When the magnetic head device 1 is mounted on the mounting base 101, the magnetic head element is mounted on the sliding contact body 5 supported on the tip of the head support 6 via the second elastic displacement portions 8, 8. 4 is opposed to the objective lens of the optical pickup device 91 with the magneto-optical disk 100 interposed therebetween. That is, an external magnetic field is applied to the irradiation position of the light beam on the magneto-optical disk 100.

Then, the magnetic head device 1 attached to the attachment base 101 is integrated with the optical pickup device 91 in the directions indicated by the arrows B and C in FIG. 18 by driving the movable base 92 by the pickup feeding mechanism. The feed operation is performed in the radial direction of the magneto-optical disk 100. The moving direction of the magnetic head device 1 relative to the magneto-optical disk 100 is a direction perpendicular to the longitudinal direction of the head support 6 as shown in FIG.

  Incidentally, as shown in FIG. 17, the magnetic head device 1 and the optical pickup device 91 are opposed to each other with the magneto-optical disk 100 interposed therebetween, and therefore, between the magnetic head device 1 and the optical pickup device 91, A space is required for loading and unloading the disk cartridge 99 mounted on the cartridge mounting portion. Therefore, the fixed portion 3 and the mounting base 101 of the magnetic head device 1 are formed at a height H1 sufficient to hold a space for loading and unloading the disk cartridge 99.

  The head support 6 extended on the disk cartridge 99 via the first elastic displacement portions 7 and 7 from the fixed portion 3 having a height H1 for holding a space for loading and unloading the disk cartridge 99 includes: As shown in FIGS. 1, 4 and 17, the sliding contact body 5 supported at the tip is brought into sliding contact with the magneto-optical disk 100 mounted on the cartridge mounting portion. It is formed to be inclined from the side of the continuous portion 6a toward the tip end side that supports the sliding contact body 5. Further, the sliding contact body 5 is made to enter the disk cartridge 99 through the recording / reproducing apparatus window 102 provided in the disk cartridge 99 at the tip end portion of the head support body 6 that supports the sliding contact body 5 to magneto-optically. A curved portion 6 b that is further curved toward the magneto-optical disk 100 side is formed in order to make sliding contact with the disk 100. The curved portion 6 b is formed by curving the base end side of the sliding contact body support arms 75 a and 75 b extending on both sides of the concave portion 75 formed at the distal end portion of the head support 6.

  Then, the head support 6 causes the sliding contact body 5 supported on the tip end side to enter the disk cartridge 99 and slide in contact with the magneto-optical disk 100 in a state where the weight body 77 is not pressed. When the sliding contact body 5 is in a state of sliding contact with the magneto-optical disk 100, one elastic displacement portion 7, 7 is elastically displaced to apply a biasing force that biases the head support 6 toward the magneto-optical disk 100 side. ing. Therefore, the sliding contact body 5 is brought into sliding contact with the magneto-optical disk 100 with a predetermined sliding contact pressure.

  By the way, the head support 6 disengages the sliding contact body 5 from the disk cartridge 99 when the disk cartridge 99 mounted on the cartridge mounting portion is mounted / removed, and the disk cartridge 99 is mounted between the head support 6 and the optical pickup device 91. The first elastic displacement portion 7 is rotated about the first elastic displacement portion 7 so as to form a space sufficient to be removed.

  Therefore, in the magneto-optical recording / reproducing apparatus to which the magnetic head device 1 is attached, as shown in FIG. 17, the pressed portion 78 provided on the weight body 77 is pressed to move the head support 6 to the first elasticity. A head rotation operation mechanism 105 that rotates in a direction away from the disk cartridge 99 with the displacement portions 7 and 7 as the center is provided. The head rotation operation mechanism 105 includes a rotation operation plate 106 that presses a pressed portion 78 provided on the weight body 77, and a rotation operation unit 107 that rotates the rotation operation plate 106. Yes. As shown in FIG. 17, the rotation operation plate 106 has pivots 108 projecting on both sides on the base end side so as to face a pressed portion 78 provided on the weight body 77, in the magneto-optical recording / reproducing apparatus. It is supported on a pair of support rods 110 planted on a support substrate 109 arranged in the above-mentioned manner, and is attached so as to be able to rotate in a direction of contacting and separating from the pressed portion 78 around the pivot 110. The rotation operation plate 106 is urged to rotate in the direction of arrow D in FIG. 17 in the direction away from the pressed portion 78 by a torsion coil spring 111 wound around the pivot 108. Further, the rotation operation unit 107 is provided so as to protrude from a part of the moving body that moves horizontally on the magnetic head device 1 to the rotation operation plate 106 side, and the moving body is in the direction of arrow E in FIG. By moving, the rotation operation pin 112 protruding from one side of the rotation operation plate 106 is pressed.

  The rotation operation plate 106 constituting the head rotation operation mechanism 105 has a pivot 108 as a center against the urging force of the torsion coil spring 111 when the rotation operation pin 112 is pressed by the rotation operation unit 107. 17 is rotated in the direction of the opposite arrow D in FIG. 17, and the pressed portion 78 provided on the weight body 77 is pressed to move the head support 6 around the first elastic displacement portions 7 and 7 to the disk cartridge 99 side. 17 is rotated and displaced in the direction of arrow F in FIG. When the head support 6 is rotationally displaced in the direction of arrow F in FIG. 17, the sliding contact body 5 is detached from the disk cartridge 99, and the disk cartridge 99 is inserted into and removed from the optical pickup device 91. Create enough space.

  The excessive rotation of the head support 6 around the first elastic displacement portions 7 and 77 by the head rotation operation mechanism 105 is caused by the rotation restricting portion 82 provided with the rotation restricting projection 83 on the fixed portion 3. It is regulated by abutting on.

  Incidentally, when the head support 6 is rotated by the head rotation operation mechanism 105, as shown in FIG. 19, the magneto-optical recording at a position substantially parallel to the magneto-optical disk 100 mounted on the cartridge mounting portion. The player is turned to a horizontal position parallel to the chassis substrate 93 in the reproducing apparatus. Further, when the head support 6 is rotationally displaced to the horizontal position around the first elastic displacement portions 7 and 7, as shown in FIG. 19, the contact portion provided at the tip of the sliding contact 5 53 abuts on a rotation posture restriction portion 85 provided at the tip of the rotation posture restriction arm 84. At this time, the sliding contact body 5 is rotationally displaced in the direction of arrow G in FIG. 19 with the second elastic piece portions 8 and 8 as the center, and the rotational posture is regulated substantially parallel to the head support 6. When the head support 6 is rotationally displaced, the rotational attitude regulating arm 84 that regulates the rotational attitude of the sliding contact body 5 so as to be substantially parallel to the head support 6 is the first elastic displacement portion 7, 7 is extended in a direction parallel to the head support 6 that is rotationally displaced to a horizontal position around the center 7. That is, the rotation posture restricting arm 84 extends to a horizontal position parallel to the chassis substrate 93 when the magnetic head device 1 is mounted in the magneto-optical recording / reproducing apparatus.

  In this magnetic head device 1, the head support 6 is rotated to a horizontal position parallel to the chassis substrate 93 in the magneto-optical recording / reproducing apparatus, which is a position substantially parallel to the magneto-optical disk 100 mounted on the cartridge mounting portion. Since the sliding contact body 5 supported at the tip of the head support 6 is parallel to the head support 6, a sufficiently large disk cartridge 99 is inserted and removed between the head support 6 and the optical pickup device 91. A space for doing this can be configured.

  By the way, the sliding contact body 5 to which the magnetic head element 4 is attached is as shown in FIGS. 4 and 17 in a natural state where the head support 6 is not rotated around the first elastic displacement portions 7 and 7. In addition, the second elastic displacement portions 8 and 8 are disposed on both sides in the vicinity of the center of gravity so that the sliding contact surface of the sliding contact portion 52 slidably contacting the magneto-optical disk 100 is substantially horizontal with respect to the main surface of the magneto-optical disk 100. It is supported and attached to the head support 6. Therefore, the head support 6 receives the elastic return force of the first elastic displacement portions 7 and 7 from the state where the head support 6 is pivotally displaced about the first elastic displacement portions 7 and 7 to the magneto-optical disk 100 side. When the sliding contact body 5 is rotationally displaced, the sliding contact body 5 is in sliding contact with the sliding contact surface of the sliding contact portion 52 being level with the main surface of the magneto-optical disk 100. In particular, the sliding contact body 5 is in sliding contact with the magneto-optical disk 100 horizontally, so that the sliding contact surface 56 of the sliding contact portion 52 protruding from the tip of the magnetic head element 4 is surely ahead of other portions. The magneto-optical disk 100 can be contacted. Therefore, when the sliding contact body 5 is in sliding contact with the magneto-optical disk 100, it is possible to reliably prevent a part of the magnetic head element 4 from coming into contact with the magneto-optical disk 100 and damaging the magneto-optical disk 100.

  Since the sliding contact body 5 is supported by the second elastic displacement portions 8 and 8 on both sides in the vicinity of the center of gravity, the sliding contact body 5 can be brought into relative sliding contact with the rotating magneto-optical disk 100 in a stable state. it can. For example, even when the main surface of the magneto-optical disk 100 has irregularities, and the slidable contact body 5 is oscillated and displaced about the second elastic displacement portions 8 and 8 by these irregularities, large vibrations are generated. It is possible to slide the magneto-optical disk 100 in a stable state without any problems. Further, even if the surface shake is generated when the magneto-optical disk 100 is rotated, the sliding contact body 5 follows the surface shake of the magneto-optical disk 100 and centers on the second elastic displacement portions 8 and 8. Thus, it is possible to make a relative sliding contact with the magneto-optical disk 100 in a stable state without causing unnecessary vibration.

  Further, the sliding contact body 5 of the magnetic head device 1 is supported by the second elastic displacement portions 8 and 8 on both sides in the vicinity of the center of gravity, and the sliding contact portion 52 to the magneto-optical disk 100 is formed as shown in FIG. As shown in FIG. 17, the second elastic displacement portions 8, 8 are positioned closer to the fixed portion 3 side, which is the first elastic displacement portions 7, 7 side that applies a biasing force to the head support 6. The head support 6 is supported on the tip side.

  The magnetic head device 1 configured as described above applies a biasing force that elastically biases the sliding contact body 5 toward the magneto-optical disk 100 when the sliding contact body 5 is in sliding contact with the magneto-optical disk 100. As shown in FIG. 20, the first elastic displacement portions 7 and 7 that support the head support body 6 are curved and displaced so as to protrude downward on the magneto-optical disk 100 side. As shown in FIG. 20, the second elastic displacement portions 8 and 8 that support 5 are curved and displaced so as to protrude upward in the opposite direction to the first elastic displacement portions 7 and 7. That is, the sliding contact body 5 is because the sliding contact portion 52 located closer to the first elastic displacement portions 7 and 7 than the position of the second elastic displacement portions 8 and 8 is in sliding contact with the magneto-optical disk 100. Since the second elastic displacement portions 8 and 8 are curved and displaced so as to protrude upward in the opposite direction to the first elastic displacement portions 7 and 7, the elastic restoring force of the second elastic displacement portions 8 and 8. Accordingly, the sliding contact body 5 has a rotational biasing force that biases the sliding contact portion 52 in the direction of arrow J in FIG. 20 around the second elastic displacement portions 8 and 8 toward the magneto-optical disk 100 side. Has been granted. Therefore, the sliding contact portion 52 is surely brought into contact with the magneto-optical disk 100 in preference to the other portions of the sliding contact body 5, and the relative sliding contact between the stable sliding contact body 5 and the magneto-optical disk 100 is achieved. Can be realized.

  As shown in FIG. 18, the magnetic head device 1 attached to the magneto-optical recording / reproducing apparatus is moved in the radial direction of the magneto-optical disk 100 with the direction orthogonal to the extending direction of the head support 6 as the moving direction. The central magnetic pole core 32 a of the magnetic pole core 32 of the magnetic head element 4 attached via the attachment portion 51 provided at the center of the sliding contact body 5 is located on the center line of the magneto-optical disk 100. Therefore, when the sliding contact body 5 is moved until the central magnetic pole core 32 a of the magnetic pole core 32 is located on the outermost peripheral side of the signal recording area of the magneto-optical disk 100, one side of the sliding contact portion 52 is the outer periphery of the magneto-optical disk 100. Will protrude. Therefore, even if the sliding contact body 5 is moved to the outermost peripheral side of the magneto-optical disk 100, one side of the sliding contact portion 52 is provided on the magneto-optical disk 100 in order to prevent it from protruding from the magneto-optical disk 100. The inclined portion 52b is inclined along the tangent line.

  The inclined surface 56a and the inclined portion 52b provided on the sliding contact surface 56 side of the sliding contact portion 52 are formed when the sliding contact body 5 is moved to the outer peripheral side of the magneto-optical disk 100 which is formed to be thick. The sliding contact body 5 is restricted from running on the outer peripheral portion of the thick magneto-optical disk 100, and the sliding contact surface 56 of the sliding contact section 52 is surely brought into sliding contact with the signal recording area portion of the magneto-optical disk 100. ing.

  By the way, since the sliding contact body 5 is in relative sliding contact with the rotating magneto-optical disk 100, it is excellent in slidability and wear resistance, is lightweight, and has a high dimensional accuracy when molded. It is desirable to be formed by. Therefore, as the material constituting the sliding contact body 5, polyphenylene sulfide (PPS), polyacelease (POM), polyarylate (PAR), polyimide 6, polyamide 66, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), A synthetic resin material such as ultra high molecular weight polyethylene (UHMW-PE) or high molecular weight polyethylene (HMW-PE) is used.

  Further, the fixed portion 3, the head support body 6, and the rotation posture regulating arm 84 are also formed of the same synthetic resin material as the material constituting the sliding contact body 5. Further, when all or part of the weight body 77 is formed of a synthetic resin, the weight body 77 is formed of the same synthetic resin material as the material constituting the sliding contact body 5. Note that the fixing unit 3, the head support 6, the turning posture regulating arm 84, and the weight body 77 may be formed by selecting an appropriate material from the above-described materials according to required characteristics.

  In addition, in the cavity of the mold apparatus for molding in which the fixed portion 3 made of a synthetic resin material, the sliding contact body 5, the head support body 6 and the rotation posture regulating arm 84, and the pair of elastic bodies 2 and 2 are arranged. It can be simultaneously molded by insert molding in which a synthetic resin material is injected and molded. In addition, when the fixing portion 3, the sliding contact body 5, the head support body 6, the rotation posture regulating arm 84, and the weight body 77 are molded by selecting appropriate materials, respectively, they are formed by a two-color molding method. You may make it do.

  Further, as shown in FIGS. 1 and 21, the magnetic head element 4 attached to the sliding contact body 5 supported on the front end side of the head support 6 and an external circuit are electrically connected to the fixed portion 3. For this purpose, an external circuit connection portion 115 to which a flat connection cable 114 such as a flexible printed wiring board or a flexible flat cable is connected is provided. The external circuit connection portion 115 has a terminal portion support piece 116 protruding from the base end side of the fixed portion 3, and the base ends of the pair of elastic bodies 2 and 2 on one main surface of the terminal portion support piece 116. Terminal portions 117 and 117 formed on the portion side are extended. These terminal portions 117, 117 are provided with cuts that form a substantially U-shape with a tapered tip at a pair of elastic bodies 2, 2 that are electrically connected to the coil 33 of the magnetic head element 4 via the power supply terminals 63, 63. It is formed by providing, and is elastically displaceable with the side of the connecting portion to the elastic bodies 2 and 2 as a fulcrum. The terminal portions 117 and 117 are bent so as to protrude on the terminal portion support piece 116, and a bent portion 117a is formed on the tip side. Accordingly, the terminal portions 117 and 117 are pressed by the bent portion 117a protruding on the terminal portion supporting piece 116, and the terminal portion supporting piece 116 side is thus provided with the side of the connecting portion to the elastic bodies 2 and 2 as a fulcrum. It is elastically displaced.

  The terminal portion support piece 116 is provided with a notch for allowing the distal ends of the terminal portions 117 and 117 to enter when the terminal portions 117 and 117 are elastically displaced.

  In addition, insertion grooves 118 for inserting connection cables 114 that are electrically connected to the terminal portions 117 and 117 are formed on opposite sides of the terminal portion supporting piece 116 in cooperation with the terminal portion supporting piece 116. A pair of connecting cable support pieces 119, 119 are provided. As shown in FIG. 21, these connection cable support pieces 119 and 119 are formed so as to protrude from the fixing portion 3 onto the terminal portion support piece 116, and together with the terminal portion support piece 116, an insertion groove 118 is formed. is doing. Further, as shown in FIG. 22, notch grooves formed on both sides of the connection cable 114 to be inserted into the insertion groove 118 are formed on the lower surface side of the connection cable support pieces 119 and 119 facing the terminal portion support piece 116. A locking claw 121 with which 120 is engaged is projected.

  The connection cable 114 is inserted into the insertion groove 118 from the distal end side, and is connected to the external circuit connection portion 115 so as to be held between the terminal portion support piece 116 and the connection cable support pieces 119 and 119. . At this time, the connection cable 114 is bent and deformed, and the connection pattern portion is pressed against the terminal portions 117 and 117 extending on the terminal portion support piece 116. The connection cable 114 is electrically connected to the pair of elastic bodies 2 and 2 by pressing the connection pattern to the terminal portions 117 and 117. The coil 33 of the magnetic head element 4 is electrically connected to an external circuit via the connection cable 114 and the pair of elastic bodies 2 and 2 and is in a state where power is supplied from the external circuit.

  By the way, the power supply terminals 63 and 63 and the terminal portions 117 and 117 formed on the pair of elastic members 2 and 2 are subjected to any one of gold plating, nickel plating, and solder plating. By performing such a plating process, the contact resistance of the power supply terminals 63 and 63 and the terminal portions 117 and 117 is reduced, and good electrical contact is realized.

  Further, as shown in FIGS. 1 and 3, through holes 121, 121 are formed on the upper surface side of the fixing portion 3 so that a part of the elastic members 2, 2 embedded in the fixing portion 3 faces outward. It is installed. The portions of the elastic members 2, 2 facing the through holes 121, 121 are inspected for inspecting the connection state between the elastic members 2, 2 and the coil 33 of the magnetic head element 4 and the electrical characteristics of the magnetic head element 4. It becomes a contact part of an instrument.

  In addition, any of the parts constituting the first elastic displacement portions 7 and 7 and the second elastic displacement portions 8 and 8 facing the outside of the pair of elastic members 2 and 2 may be any of gold plating treatment, nickel plating treatment, and solder plating treatment. By applying such a plating process, it is possible to rust these parts.

  In the above-described embodiment, a pair of elastic members 2 and 2 are used, but a plurality of pairs may be used in consideration of the elastic displacement force and strength of the metal plate constituting the elastic members 2 and 2.

It is a perspective view of the upper surface side of the magnetic head device according to the present invention. FIG. 3 is a perspective view of the magnetic head device according to the present invention as viewed from the side in contact with the optical recording medium. 1 is a plan view of a magnetic head device according to the present invention. 1 is a side view of a magnetic head device according to the present invention. It is a disassembled perspective view of the magnetic head which comprises the magnetic head apparatus based on this invention. It is a side view of the bobbin which comprises a magnetic head element. It is a right view of the bobbin shown in FIG. It is a bottom view of the bobbin shown in FIG. It is a top view of a sliding contact body. It is a side view of a sliding contact body. It is a bottom view of a sliding contact body. It is the IX-IX sectional view taken on the line of FIG. It is the IIIX-IIIX sectional view taken on the line of FIG. It is the IVX-IVX sectional view taken on the line of FIG. It is sectional drawing which shows the assembly state of a magnetic head. It is sectional drawing which shows the state which attached the magnetic head element to the sliding contact body. 1 is a side view showing a state in which a magnetic head device according to the present invention is attached to a magneto-optical recording / reproducing apparatus. 1 is a perspective view showing the relationship between a magnetic head device according to the present invention and a magneto-optical disk mounted on a magneto-optical recording / reproducing apparatus. It is a side view which shows the state which the head support body rotated in the direction away from a magneto-optical disk. FIG. 3 is a side view of a state in which a sliding contact body is in sliding contact with a magneto-optical disk. It is a perspective view which shows the external circuit connection part provided in the fixing | fixed part. It is sectional drawing of an external circuit connection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic head apparatus, 2, 2 Elastic body, 3 Fixed part, 4 Magnetic head element, 5 Sliding contact body, 6 Head support body, 7, 7 1st elastic displacement part, 8, 8 2nd elastic displacement part, DESCRIPTION OF SYMBOLS 10 Magnetic head, 52 Sliding contact part of sliding contact body, 77 Weight body, 78 Pressed part, 82 Turning control part, 83 Turning control protrusion, 84 Turning attitude control arm

Claims (3)

A magnetic head element comprising a magnetic core and a bobbin to which a coil is attached;
The magnetic head element is attached, and a sliding contact formed by molding a synthetic resin that slides on the magneto-optical recording medium;
A fixed portion made of synthetic resin is integrally formed on the base end portion side, and the sliding contact body is integrally formed on the distal end side, and at least a pair of elastic members having electrical conductivity electrically connected to the coil. Body,
A part of the elastic body is faced outward between the fixed part and the first elastic displacement part is formed, and a part of the elastic body is faced outward between the sliding contact body. A head support formed by molding a synthetic resin integrally with the elastic body, located between the fixed portion and the sliding contact body so as to form a second elastic displacement portion,
A weight body, which is located closer to the fixed portion than the first elastic displacement portion and is provided integrally with the head support;
A rotation operation unit that is provided integrally with the weight body and that rotates the head support around the first elastic displacement unit;
The sliding contact surface of the sliding contact body with respect to the magneto-optical disk is provided extending from the fixed portion, the turning operation portion is turned, and the head support is centered on the first elastic displacement portion. And a rotation attitude regulating arm that regulates the rotation attitude of the sliding contact body when it is operated to rotate upward in opposition to the sliding contact body.   When a part of the sliding contact body comes into contact with the rotation posture restriction arm and the rotation of the head support is restricted, the rotation posture restriction arm and the head support are made substantially parallel. The magnetic head device according to claim 1. 2. The magnetic head device according to claim 1, wherein the weight body is extended on one side of the elastic body, and the rotation posture restricting arm is extended on the other side of the elastic body.

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