WO2001073764A1 - Dispositif a tete rotative - Google Patents

Dispositif a tete rotative Download PDF

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Publication number
WO2001073764A1
WO2001073764A1 PCT/JP2001/002376 JP0102376W WO0173764A1 WO 2001073764 A1 WO2001073764 A1 WO 2001073764A1 JP 0102376 W JP0102376 W JP 0102376W WO 0173764 A1 WO0173764 A1 WO 0173764A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotary
circuit board
transformer
drum
rotating
Prior art date
Application number
PCT/JP2001/002376
Other languages
English (en)
Japanese (ja)
Inventor
Masakazu Ito
Hisashi Takahashi
Katuo Ishikawa
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2001073764A1 publication Critical patent/WO2001073764A1/fr

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support

Definitions

  • the present invention relates to a rotary head device of a helical scan type magnetic recording / reproducing device, and more particularly to a rotary head device having a mouthpiece transformer disposed in a drum.
  • a magnetic head attached to a rotary drum rotatably supported on a fixed drum transmits and receives signals to and from the rotary drum.
  • a rotary transformer is arranged in a drum configured to be implemented via a rotary transformer rotation-side winding mounted and a rotary transformer fixed-side winding mounted on the fixed drum.
  • a rotary head device consisting of:
  • Examples of such a rotating head device include the following.
  • Japanese Patent Application Laid-Open No. 5-324504 proposes a rotary head device using a plug and a socket for electrically connecting a rotary transformer and a magnetic head. .
  • a socket is fitted into and fixed to a stepped hole provided in the rotary drum, and the socket is soldered to a head provided in the rotary drum.
  • the rotary winding on the rotary side of the transformer is bonded and fixed to a fixing member having a plug section. The winding and the plug are electrically connected.
  • a fixing member to which the rotary winding on the rotary unit is adhered and fixed is fixed to the rotating drum with screws.
  • the plug portion is engaged with a socket disposed at a position opposite to the rotary drum, and the rotary winding on the single-transistor is electrically connected to the magnetic head.
  • the fixed transformer winding is fixedly mounted above the rotary transformer rotating side winding via a support member with a small gap.
  • FIG. 10 there is known a rotary head device in which an electrical connection between a low-transformer and a magnetic head is performed by soldering.
  • a flange 6 is rotatably supported on a drum shaft 3 implanted in the fixed drum 1 via a lower bearing 4 and an upper bearing 5, and the fixed drum 1 has a stator 9 via a pedestal 8. Is fixed.
  • the rotating drum 2 is arranged on the upper surface side of the flange 6, and the rotor composed of the magnet 10 and the yoke 11 is arranged on the lower surface side.
  • the rotating drum 2 and the rotor are coaxial with the drum shaft 3 by tightening the female screw provided on the yoke 11 through the screw 13 through the through hole 6a formed in the flange 6. Is fixed to the flange 6.
  • the sub yoke 7 is held by the magnetic attraction of the magnet 10 with respect to the rotor.
  • a magnetic head 21 is fixed to the lower surface of the rotary drum 2, and a rotary winding 1 ⁇ ⁇ of the rotor is fixed to the mounting surface 2 a on the upper surface.
  • a relay circuit board 16 is adhesively fixed to the rotary winding 17 of the transformer.
  • connection pieces 15 g One end of the electrical conductor 15 is a magnetic head-side connecting piece 15 f connected to the magnetic head 21, and the other end is a rotor connected to the rotatable transformer winding 17. 15 g of connection pieces on the transformer side are formed. In the figure, the two connection pieces are shown in a separated state for convenience, but they are actually continuously integrated.
  • the magnetic head-side connection piece 15 f is brought into contact with the connection part of the magnetic head 21 to make an electrical connection, and the rotary transformer-side connection piece 15 g is connected to the wiring pattern of the circuit board 16.
  • mouth one data re transformer-side connection piece 1 5 g mouth one data re trans rotating winding 1 I electrically Connected to.
  • the rotary transformer fixed side winding 18 fixed to the support boss 19 with a small clearance of about 30 m is provided above the transformer rotating side winding 1 mm. It is fixed to the drum shaft 3 by 20.
  • the rotary transformer-side connecting piece 15 h of the electric conductor 15 is connected to the lower side of the circuit board 16. It is configured to come into contact with the contact portion of the wiring pattern provided in the.
  • the contact portion of the wiring pattern has a size of several mm in diameter around the target point where the rotary transformer side connection piece 15 d comes into contact, so that it can be connected to the transformer side connection piece 15 h. Variations in the positions of the contact portions of the wiring patterns provided on the lower side of the circuit board 16 can be absorbed.
  • the elasticity is imparted to the connecting piece 15 h on the transformer side, so that the rotating coil 17 on the transformer side is connected as shown in FIG.
  • the connecting piece 15 h on the rotary transformer side Before mounting on the board 16, the connecting piece 15 h on the rotary transformer side is in the state of 15 i shown by a broken line, and the winding 17 on the transformer rotating side is the mounting surface 2 a of the rotating drum 2.
  • the rotary transformer-side connecting piece 15i is displaced by a predetermined amount and is kept at the state of 15h indicated by a solid line.
  • the transformer-side connecting piece 15 h generates a repulsive force in the direction of arrow F against the circuit board 16, and this repulsive force becomes a contact pressure, and the contact portion of the circuit board 16 and the rotary section are rotated.
  • a stable electrical connection state is obtained between the transformer-side connecting pieces 15 h, and the magnetic head 21 and the rotary transformer 17 are electrically connected to each other.
  • each of the rotary head devices configured as described above has the following problems.
  • connection between the rotary drum and the winding on the rotary side of the transformer is performed by fitting the socket and the plug.
  • it is necessary to ensure high accuracy in the coaxial position between the rotary transformer winding and the rotating shaft.
  • it is extremely difficult to simultaneously satisfy the two positional precisions.
  • the first positioning is performed by fitting a socket and a plug, usually, there are a plurality of combinations of a socket and a plug, and the number of sockets and plugs increases as the number of channels increases. It is very difficult to fit.
  • the second positioning for obtaining the coaxiality between the rotary transformer winding and the rotary shaft is performed, but the first positioning position and the second positioning position are performed. It is extremely rare that they match due to variations in component accuracy. For this reason, the positioning is performed by moving the transformer winding on the mouth to the first positioning position and the second positioning position, but in order to secure a desired moving amount, the already fitted sockets are used.
  • the plug and plug need to be slightly deformed. However, if the joint between the socket and the plug is deformed, the electrical connection between the mouthpiece transformer and the magnetic head and the reliability of the socket-plug structure will be significantly impaired.
  • circuit board 16 is adhered and fixed to the rotary winding 17 on the one-piece lance, and the adhesive used at this time adheres to the wiring pattern of the circuit board 16 and solders. It may not be possible to lay 14
  • the rotary head device of the third conventional example there is no need to use a socket / plug for connection between the rotary drum and the rotary unit on the rotary side of the unitary transformer as in the first conventional example. Further, unlike the second conventional example, it is not necessary to fit the rotary transformer side connection piece 15 g into the through hole 16 a formed in the circuit board 16.
  • the contact pressure for obtaining a stable electrical connection between the contact part of the circuit board 16 and the connection piece on the transformer side for 15 h always shows the arrow F. Is applied in the direction of. Since the direction of the arrow F coincides with the direction in which the adhesive between the rotary transformer rotating winding 17 and the rotating drum 2 is peeled off, the rotary transformer winding 17 and the rotating drum 2 are rotated. There is a serious drawback that the force for peeling off the adhesive fixation always works.
  • the present invention solves the above-mentioned problems, and realizes a highly reliable electrical connection between a rotary transformer and a magnetic head and a rotation capable of realizing mounting of a single-piece rotary transformer by a simple configuration and simple operation.
  • the purpose is to provide a head device. Disclosure of the invention
  • the rotary head device includes a connecting piece for urging the one end of the electrical conductor in contact with the wiring pattern of the circuit board in a direction of pressing the transformer rotating side winding against the mounting surface of the rotary drum. Is formed.
  • connection between the magnetic head and the rotary transformer can be easily and reliably performed, and a rotating head device that is easy to assemble and has high reliability can be realized.
  • the force to peel off the transformer as in the conventional contact method Since it is not added, the reliability of the fixed connection between the transformer and the rotating drum can be improved, and a high-performance rotating head device can be realized.
  • the rotary head device is configured to transmit and receive signals to and from a magnetic head mounted on a rotary drum rotatably supported on a fixed drum, by using a rotary transformer winding on a rotary transformer mounted on the rotary drum.
  • a rotary head device mounted via the fixed-transformer fixed-side winding attached to the fixed drum, wherein a circuit board is fixed to the fixed-transformer rotary-side winding;
  • An electrical conductor that is insulated and held, and the electrical conductor contacts one end of the electrical conductor with the wiring pattern of the circuit board and presses the rotary transformer rotating side winding against the mounting surface of the rotary drum.
  • a connection piece that urges in a direction is formed, and a connection piece that contacts an electrode provided on a magnetic head is formed at the other end of the electrical conductor.
  • the extremely reliable electrical connection between the mouthpiece transformer and the magnetic head and the installation of the mouthpiece transformer can be realized with a simple configuration and simple work.
  • the electric conductor of the rotary head device of the present invention is attached to the rotary drum via a support made of an insulating material and formed with a support groove into which an intermediate portion of the electric conductor is inserted.
  • the rotary head device is characterized in that the electrical conductors are provided in a number corresponding to the number of channels of the magnetic head.
  • the circuit board of the rotary head device has a notch at a position corresponding to a connection piece of the electrical conductor that is attached to the rotary drum and extends to the upper surface of the mounting surface of the rotary drum. Is formed. According to this configuration, the rotary transformer rotating side winding can be installed in the rotating drum by the one-way insertion operation.
  • the circuit board and the electrical conductor may be configured such that a rotary transformer winding on which the circuit board is fixed is set on a mounting surface of a rotary drum, and the circuit board is The electric conductor attached to the rotating drum is relatively rotated from the state in which the leading end of the electric conductor is projected from the cutout portion of the circuit board to the upper surface of the circuit board, and the connection piece is connected to the circuit board.
  • the circuit board and the electrical conductor are electrically connected so as to overlap the contact portion of the wiring pattern.
  • the rotary head device of the present invention may be configured such that a shape of a tip of a connection piece of the electrical conductive body protruding from a cutout portion of the circuit board is brought into contact with an end face of the circuit board and the opening side of the transformer rotating side. It is characterized in that it is bent so as to form an inclined side that rides on the circuit board with the rotation of the winding.
  • a notch is formed on the circuit board in accordance with a rotation angle at the time of assembling the low-return rotation side winding, and an electric conductor is provided on the side of the rotary drum. It is characterized in that a protruding portion is provided which restricts the rotation of the rotary transformer rotation side winding by abutting on the connection piece in a state where the connection piece is rotated to a position overlapping the contact portion of the circuit board.
  • the rotary head device of the present invention includes a rotary head and a rotary transformer. And connecting each of the plurality of electric conductors to the rotary drum for each magnetic head at a position sandwiching the rotation center of the rotary drum. It is characterized by being provided in.
  • the rotary head device may further include a step of applying an adhesive to a contact point between the outer peripheral surface of the rotary transformer and the circuit board to fix both, and the circuit board includes a contact portion of a wiring pattern.
  • a notch, a groove, or a hole for regulating the flow of the uncured adhesive is formed between the adhesive and the application point of the adhesive.
  • the rotary head device of the present invention may be configured such that a support groove having a width larger than the thickness of the electric conductor is formed in the holder that insulates and holds the electric conductor, and the electric conductor is inserted into the support groove.
  • a bent portion is formed at least in part, and a width from a distal end portion to a base end portion of the bent portion is larger than a width of the support groove.
  • FIG. 1 is a cross-sectional view of the rotary head device according to the embodiment of the present invention
  • FIG. 2 is a plan view of the rotary head device shown in FIG. 1,
  • Fig. 3 is an enlarged view of the transformer-side connection of the rotary head device shown in Fig. 1,
  • FIG. 4 is a plan view of the rotary winding of the rotary head device, the circuit board, and the rotating drum of the rotary head device shown in Fig. 1.
  • FIG. 5 is a plan view showing an assembled state of the rotary winding and the rotary drum shown in FIG. 4;
  • FIG. 6 is a schematic diagram illustrating the connection between the electrical conductor and the circuit board
  • FIG. 7 is a schematic diagram illustrating a fixed state of the rotary transformer winding on the rotary transformer of the rotary head device illustrated in FIG. 1 and the circuit board
  • FIG. 8 is a schematic diagram illustrating the relationship between the electrical conductor and the support of the rotary head device shown in FIG. 1,
  • FIG. 9 is a schematic diagram illustrating the relationship between the electrical conductor shown in FIG. 8 and the electrical conductor and the support seen from the direction of arrow D.
  • FIG. 10 is a cross-sectional view of a conventional rotary head device.
  • Fig. 11 is a cross-sectional view of a conventional rotary head device showing another example different from Fig. 10.
  • Fig. 12 is an enlarged view of the main part of the transformer-side connection part of the rotary head device shown in Fig. 11 FIG. Embodiment
  • FIGS. 1 to 9 a rotary head device according to the present invention will be described with reference to FIGS. 1 to 9 based on specific embodiments.
  • This embodiment differs from the first embodiment in that the state of attachment of the rotary transformer to the rotary drum 2 is special.
  • the other basic configuration is the same as that of the conventional example shown in FIGS. 10 and 11. .
  • a two-channel rotary head device will be described as an example.
  • the rotating head device rotates with respect to the fixed drum 1.
  • the magnetic head 21 mounted on the rotatably supported rotary drum 2 transmits and receives signals.
  • the rotary head mounted on the rotary drum 2 has the transformer rotating side winding 17 and the rotor mounted on the fixed drum 1. It is configured to be implemented via the fixed transformer winding 18.
  • a flange 6 is rotatably supported on the drum shaft 3 implanted on the fixed drum 1 via a lower bearing 4 and an upper bearing 5, and the fixed drum 1 has a stator 9 via a pedestal 8. Is fixed.
  • the rotating drum 2 is arranged on the upper surface side of the flange 6, and the rotor composed of the magnet 10 and the yoke 11 is arranged on the lower surface side.
  • the rotating drum 2 and the rotor are coaxial with the drum shaft 3 by tightening the female screw provided on the yoke 11 through a screw 13 through a through hole 6 a formed in the flange 6. It is fixed to the flange 6.
  • the sub yoke 7 is held by the magnet 10 with the magnetic attraction to the rotor.
  • a magnetic head 21 is fixedly mounted on the lower surface of the rotary drum 2, and a rotary transformer rotary winding 17 to which a circuit board 16 is fixed is mounted on an upper mounting surface 2 a. Energized and attached.
  • a rotary transformer fixed side winding 18 fixed to the support boss 19 with a small gap is provided on the drum shaft 3 by a transformer fixing screw 20 above the rotary lance rotating side winding 17. It is fixed.
  • An electric conductor 15 is disposed between the rotating drum 2 and the yoke 11.
  • the electric conductor 15 is made of an insulating material and has a support groove 1 2 into which an intermediate portion of the electric conductor 15 is inserted. a is attached to the rotating drum 2 via the support 12 formed.
  • the magnetic conductor 21 and the rotary transformer rotating side winding 1 ⁇ ⁇ ⁇ ⁇ are electrically connected by the electric conductor 15. Connected.
  • the electrical connection between the magnetic head 21 and the single-turn transformer rotating side winding 1 ⁇ ⁇ ⁇ by the electric conductor 15 is made in detail as shown in FIG.
  • the electric conductors 15 are provided in a number corresponding to the number of channels of the magnetic head 21. Generally, two electric conductors are required for one channel. In this case, two electric conductors 15 and 24 are arranged per channel, and electric conductors 15 and 24 configured similarly to form a two-channel system are arranged at positions sandwiching the rotating shaft 3. ing.
  • transformer connection pieces 15b and 24b are formed to urge in the direction of pressing against surface 2a.
  • the rotating drum 2 to which the electric conductors 15 and 24 are attached is mounted on the rotating drum 1 from the lower surface where the magnetic head 21 is fixedly mounted.
  • a hole 2b is made to penetrate to the upper surface where 7 is fixed.
  • wiring patterns 22 and 23 are formed on the upper surface of the circuit board 16 attached to the winding 17 on the rotating side of the transformer.
  • the coil connecting portions 22 a and 23 a for connecting the coil wires of the side winding 17 and the contact portions 2 2 b and 23 b at the other end where the rotary transformer side connecting pieces 15 b and 24 b are in contact. are formed respectively.
  • the magnetic head side connecting pieces 15a and 24a contact the connecting portions 21a and 21b of the magnetic head 21.
  • the rotary transformer side connection pieces 15b and 24b pass through the holes 2b and abut on the contact portions 22b and 23b of the wiring patterns 22 and 23 of the circuit board 16, and the magnetic head 2 and the transformer winding 1 ⁇ are electrically connected.
  • the two connecting pieces are shown in a separated state, but they are actually continuous and integrated.
  • mounting of the single-transistor rotary side winding 17 on the mounting surface 2a of the rotary drum 2 is performed by urging the electric conductors 15 and 24. It is performed by If it is deemed that the holding force is insufficient with only the biasing force of the electrical conductors 15 and 24, the reinforcement is provided by bonding the rotary drum 2 and the rotary transformer rotating side winding 17 or the like. You may go.
  • connection between the rotary transformer side connection pieces 15b, 24b and the contact portions 22b, 23b of the wiring patterns 22, 23 of the circuit board 16 is shown in Fig. 3. As described above, this is performed by the elastic force of the electric conductors 15 and 24.
  • the connecting pieces 15 b, 24 b of the rotary transformer are 15 c, 24 indicated by broken lines.
  • the rotary transformer side connecting piece at the position indicated by the broken lines 15 c, 24 c 15 b and 24 b are displaced by a predetermined amount, and are kept in the states of 15 b and 24 b shown by solid lines. Due to the elastic deformation of the rotary transformer side connection pieces 15b, 24b, a repulsive force in the direction of arrow A is generated at the single-piece transformer side connection pieces 15b, 24b, which urges the circuit board 16. Then, the electrical connection between the magnetic head 21 and the rotary transformer winding 17 is performed, and the rotary transformer winding 17 is attached to the rotating drum 2.
  • the repulsive force becomes a contact pressure, and a stable electrical connection state is obtained between the contact portions 22 b and 23 b of the circuit board 16 and the rotary transformer side connection pieces 15 b and 24 b. .
  • the contact force generated in the direction of the circuit board 16 by the contact pieces 15c and 24c on the transformer side is preferably several tens of grams.
  • FIG. 4A shows the rotary transformer winding 17 before being inserted into the rotary drum 2
  • FIG. 4B shows a state of the rotary drum 2 attached to the rotary shaft 3. Note that both phases are matched to the phase at the time of insertion.
  • the contact 17 for connecting the wiring patterns 22 and 23 and the connecting pieces 15b and 24b on the transformer is connected to the transformer 17 on the rotating side of the transformer.
  • the circuit board 16 on which the parts 22b and 23b are disposed is fixed by bonding.
  • a notch 16c is formed on the circuit board 16 at a position corresponding to the mouthpiece-side connection pieces 15b and 24b of the electrical conductors 15 and 24.
  • the rotary drum 2 has a hole 2b at a position corresponding to the notch 16c.
  • the rotary transformer side winding 17 to which the circuit board 16 is fixed is set on the rotating drum 2.
  • the notch 16 c overlaps the hole 2 b of the rotating drum 2 on the circuit board 16, and the electrical conductors 15, 24 come into contact with the magnetic head 21. From the fixed lower surface, it penetrates to the upper surface where the transformer rotation side winding 17 is fixed, and the connection transformer side connection pieces 15b and 24b protrude.
  • the rotary transformer rotating side winding 17 is rotated around the drum shaft 3 by a predetermined angle in the direction of arrow B around the rotation axis of the drum shaft 3 to form the second phase state.
  • the contact portions 22 b and 23 b of the wiring patterns 22 and 23 of the circuit board 16 and the contact piece 15 of the electrical conductors 15 and 24 on the one-to-one transit side b and 24 b move relative to each other and overlap, and the circuit board 16 and the electrical conductor 15 are electrically connected.
  • connection work can be further simplified by forming e and 24 e.
  • Figures 6 (a) and 6 (b) show the relationship between the connection pieces 15b, 24b on the mouth side and the contacts 22b, 23b in the horizontal direction.
  • the tip of the rotary transformer side connection pieces 15b, 24b of the electrical conductors 15, 25 in the first phase state has inclined sides 15e, 2b. 4 e is formed, and the contact portions 22 b and 23 b of the circuit board 16 are set slightly higher than the connection pieces 15 b and 24 b on the lip transformer side, and the circuit is awaited.
  • the end face 16 g of the circuit board 16 here is the end face of the notch 16 d of the circuit board 16 on the side of the contact portions 22 b and 23 b.
  • the magnetic head 21 and the single-turn transformer rotating side winding 17 can be connected by an extremely simple operation of one rotation operation.
  • the contact portions 2 2 b and 23 b of the circuit board 16 are slightly higher than the contact pieces 15 b and 24 b on the touch-transistor side.
  • the transformer-side connection pieces 15b, 24b of the first and second transformers are bent as shown in FIG. 3 and generate a repulsive force in the direction of arrow A to generate a contact pressure, which is extremely stable. Electrical connection can be maintained.
  • the positioning from the first phase to the second phase depends on the rotation angle at the time of assembling the single-piece transformer rotation side winding 17 on the circuit board 16 as shown in FIG. A notch 16 d is formed, and the rotary drum 2 is easily realized by forming a protrusion 40 at a position corresponding to the notch 16 d as shown in FIG. 4 (b). it can. That is, in the first phase state shown in FIG. 5 (a), the protrusion 40 and the one end 16e of the notch 16d are brought into contact with each other, and then, as shown in FIG. 5 (b). In the second phase state, the convex portion 40 is configured to abut on the other end 16 f of the notch 16 d to regulate the rotation of the rotary transformer side winding 17. .
  • the first and second phases can be easily determined, and the simplicity of the operation can be improved.
  • the convex portion 40 may be directly disposed on the rotary drum 2, or may be formed with a through hole in the rotary drum 2 and attached to the support 12 of the electric conductors 15 and 24. The same effect can be obtained by using the support 12 itself.
  • the outer peripheral surface of the mouth re-transformer 17 and the abutting surface of the circuit board 16 are fixed with an adhesive 25 as shown in FIG. Is done.
  • Adhesive 25 may also be applied to the corners formed by circuit board 16 and arrow 17 on the rotary side of the rotary transformer for reinforcement, and is applied only to the contact surface. However, a phenomenon in which the adhesive 25 flows out to the corner C occurs.
  • the adhesive 25 applied or spouted to the corner portion C flows along the corner portion C and flows on the circuit board 16 until it is fixed, and thus may adhere to an unnecessary portion.
  • the flowing adhesive 25 adheres to the coil connection portions 22a and 23a and the contact portions 22b and 23b, normal electrical connection cannot be performed.
  • the uncured adhesive is applied between the contact points 2 2b and 23 b of the wiring patterns 22 and 23 and the application point of the adhesive 25.
  • the through holes 16a and 16b for restricting the flow of the adhesive 25 are formed in the circuit board 16, the flow of the uncured adhesive 25 flows at the end faces of the through holes 16a and 16b. This prevents the adhesive 25 from sticking to the coil connecting portions 22a and 23a and the contact portions 22b and 23b.
  • the same effect as described above can be obtained by forming a notch or a groove instead of the through holes 16a and 16b.
  • This configuration is applicable not only to the case where the circuit board 16 and the like are fixedly attached to the rotary transformer fixed side winding 18 as well as the rotary transformer rotating side winding 17.
  • the support groove 12a of the support body 12 supporting the intermediate portion of the electric conductor 15 and the electric conductor 15 are connected to each other by using FIGS. With the configuration shown in (1), the electric conductor 15 can be fixed more stably.
  • FIG. 8 is a schematic diagram in which the electric conductor 15 is inserted into the support groove 12 a of the support 12, and FIG. 9A shows the electric conductor 15 before the support groove 12 a is inserted.
  • FIG. 9 (b) shows a state where FIG. 8 is viewed from the direction of arrow D.
  • the width T2 of the support groove 1 2a is formed slightly larger than the width T1 of the electric conductor 15 for reasons such as simplicity of assembling.
  • the lower end of the inserted portion of the electrical conductor 15 to be inserted is denoted by h1, and the upper end is denoted by h2.
  • the electric conductor 15 before insertion has a bent portion 15d formed between the lower end h1 and the upper end h2 of the inserted portion.
  • the angle formed by the bent part 15 d is set to O 1.
  • This O 1 is an angle at which the distance T 3 between the straight line connecting the lower end h 1 and the upper end h 2 of the inserted portion and the bent portion 15 d satisfies T 3> T 2.
  • the angle 6> 1 of the bent portion 15d is set so that T3> T2.
  • the angle O 1 of the bent portion 15 d is wider by an angle than before the insertion, and becomes 2.
  • the electric conductor 15 generates a repulsive force of the spread angular segment, and the electric conductor 15 is in the support groove 12 a, and the lower end h 1 of the inserted portion is in the support groove 12 a At the lower end of the support groove 1 2c, at the upper end of the inserted part h2 at the upper end 1 2b of the support groove 12a, and at the bent part 15d, opposite to the support grooves 12a, 12b and 12c Pressed by the repulsive force to the middle part 1 2 d of the side surface o
  • the electrical conductor 15 is held in the support groove 12a without rattling, and the rotary transformer-side connection piece 15b can be maintained extremely stably at a desired position, and the magnetism is reduced.
  • the electrical connection between the head 21 and the rotary transformer 17 can be made highly reliable. This configuration can also be applied to the head-side connection piece 15a of the electric conductor 15.
  • the width T2 of the support groove 12a is made larger than the thickness T1 of the electric conductor 15 and the electric conductor 15 inserted into the support groove 12a is bent at least partially.
  • the width T 3 from the distal end h 2 to the base end h 1 of the bent part 15 D is made larger than the width T 2 of the support groove 12 a, The connection between the magnetic head 21 and the portable transformer can be realized with high reliability.
  • the case of the two-channel system has been described as an example as shown in FIG. 2, but the present invention is not limited to this, and the hole 2 b of the rotating drum 2, the electrical conductor 1 5, 24, head side connection piece 15 a, 24 a, single-piece transformer side connection pieces 15 b, 24 b, contact points 22 b, 23 b, etc., symmetrical positions around drum shaft 3, i.e., 180
  • the rotation balance of the rotating head device can be secured by arranging them separately.
  • the above angle may be set to 90 degrees, and in the case of a channel larger than that, it may be equally arranged.
  • the electric conductors 15 and 24 may be formed of either a plate or a wire, and the surface thereof, particularly the magnetic head side connection piece 15 a , 24a, Rotary transformer side Connection pieces 15b, 24b are treated with metal plating or other protective treatment to ensure stable electrical connection over a long period of time. Is preferable in that
  • the contact points 2 2 b and 23 b of the wiring patterns 22 and 23 have a diameter of about several mm around the target point where the transformer side connection pieces 15 b and 24 b contact.
  • the positional variation between the rotary transformer-side connection pieces 15b and 24b and the contact portions 22b and 23b can be absorbed.
  • the surface of the contact portions 22b and 23b is subjected to a metal shell or the like, a stable electrical connection can be obtained for a long period of time. Therefore, it is preferable to maintain the reliability of the equipment.

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Abstract

Dispositif à tête rotative permettant de réaliser la connexion électrique très fiable d'un transformateur rotatif avec une tête magnétique et l'installation du transformateur rotatif par une structure simple et une opération facile. La communication des signaux de la tête magnétique (21) installée sur un tambour rotatif (2) placé rotatif sur un tambour fixe (1) est opérée par l'intermédiaire d'un enroulement côté rotatif (17) de transformateur rotatif installé sur le tambour rotatif (2) et d'un enroulement côté fixe (18) de transformateur rotatif installé sur le tambour fixe (1). Une carte à circuit imprimé (16) est fixée à l'enroulement côté rotatif (17) de transformateur rotatif et un conducteur électrique isolé (15) est installé sur le tambour rotatif (2). Ledit conducteur électrique (15) forme, à une de ses extrémités, un élément de connexion (15b) qui appuie sur le câblage (22) de la carte à circuit imprimé (16) et excite l'enroulement côté rotatif (17) du transformateur rotatif dans une direction qui pousse l'enroulement contre la surface d'installation (2a) du tambour rotatif (2), et à l'autre extrémité, un élément de connexion (15a) qui appuie sur une électrode installée sur la tête magnétique (21).
PCT/JP2001/002376 2000-03-29 2001-03-23 Dispositif a tete rotative WO2001073764A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000090003A JP2001273619A (ja) 2000-03-29 2000-03-29 回転ヘッド装置
JP2000-090003 2000-03-29

Publications (1)

Publication Number Publication Date
WO2001073764A1 true WO2001073764A1 (fr) 2001-10-04

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066302A (ja) * 1983-09-21 1985-04-16 Hitachi Ltd Ｖｔｒ用のヘツドとトランスとの接続装置
JPS60129904A (ja) * 1983-12-15 1985-07-11 Matsushita Electric Ind Co Ltd テ−プガイドドラム装置
JPH01204212A (ja) * 1988-02-08 1989-08-16 Mitsubishi Electric Corp 回転ヘッド装置
JPH0252413U (fr) * 1988-10-07 1990-04-16
JPH03119509A (ja) * 1989-10-02 1991-05-21 Canon Inc 回転磁気ヘッド装置
JPH0467206U (fr) * 1990-10-23 1992-06-15
JPH1131301A (ja) * 1997-07-08 1999-02-02 Sharp Corp 磁気記録再生装置のロータリートランス

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066302A (ja) * 1983-09-21 1985-04-16 Hitachi Ltd Ｖｔｒ用のヘツドとトランスとの接続装置
JPS60129904A (ja) * 1983-12-15 1985-07-11 Matsushita Electric Ind Co Ltd テ−プガイドドラム装置
JPH01204212A (ja) * 1988-02-08 1989-08-16 Mitsubishi Electric Corp 回転ヘッド装置
JPH0252413U (fr) * 1988-10-07 1990-04-16
JPH03119509A (ja) * 1989-10-02 1991-05-21 Canon Inc 回転磁気ヘッド装置
JPH0467206U (fr) * 1990-10-23 1992-06-15
JPH1131301A (ja) * 1997-07-08 1999-02-02 Sharp Corp 磁気記録再生装置のロータリートランス

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