WO2020042147A1 - 超声探头 - Google Patents

超声探头 Download PDF

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Publication number
WO2020042147A1
WO2020042147A1 PCT/CN2018/103526 CN2018103526W WO2020042147A1 WO 2020042147 A1 WO2020042147 A1 WO 2020042147A1 CN 2018103526 W CN2018103526 W CN 2018103526W WO 2020042147 A1 WO2020042147 A1 WO 2020042147A1
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WO
WIPO (PCT)
Prior art keywords
fpc
transducer
circuit layers
probe according
protection
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/103526
Other languages
English (en)
French (fr)
Inventor
柯昌星
唐明
郑洲
吴飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Mindray Bio Medical Electronics Co Ltd
Shenzhen Mindray Scientific Co Ltd
Original Assignee
Shenzhen Mindray Bio Medical Electronics Co Ltd
Shenzhen Mindray Scientific 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 Shenzhen Mindray Bio Medical Electronics Co Ltd, Shenzhen Mindray Scientific Co Ltd filed Critical Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority to PCT/CN2018/103526 priority Critical patent/WO2020042147A1/zh
Priority to CN201880096130.6A priority patent/CN112512429B/zh
Publication of WO2020042147A1 publication Critical patent/WO2020042147A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves

Definitions

  • the present application relates to the technical field of medical devices, and in particular, to an ultrasonic probe.
  • An ultrasonic probe with a three-dimensional imaging function is called a 3D mechanical probe.
  • a stepping motor is used as a driving power source.
  • the stepping motor drives a transducer (an acoustic head) to swing within a certain angle range through a transmission system under signal control.
  • Transmitters and receivers of transducer signals are usually transmitted using flexible circuit boards or acoustic head lines (micro-cables).
  • the transducer's internal signal transmission line is relatively static during the use of the transducer.
  • traditional FPC can meet the requirements.
  • the transducer acoustic head
  • the cables for transmitting and receiving the transducer signals will swing with the transducer.
  • Traditional flexible circuit boards (cables) ) The swing is more disordered, can not meet the requirements of the service life, and breaks during use, resulting in damage to the probe.
  • an acoustic head line (micro-cable) is usually used to connect the rotating part of the transducer to ensure the effective transmission of the transducer signals.
  • the acoustic head line requires high welding technology, complicated welding processes, high equipment requirements, high cost, and high performance. Long period and low cost performance.
  • an ultrasonic probe including a transducer, a rotating shaft, an FPC, and a mounting base.
  • the rotating shaft is rotatably mounted on the mounting base, the transducer is fixedly mounted on the rotating shaft, and the FPC passes through the mounting base and the transducer.
  • Energizer connection; the terminal of the transducer is provided with a protective component, which is used to swing the FPC at the limit position.
  • the protection component is a protection block
  • the protection block has an arc-shaped protection surface
  • the FPC is routed along the protection surface of the protection block.
  • the protection block has a piece, and the FPC is bent along the protection surface of the protection block to be connected to one side of the transducer.
  • the protection blocks have two symmetrically arranged, the protection surfaces of the two protection blocks are arranged face to face, and there is a gap in the wiring between the protection surfaces of the two protection blocks, and the FPC passes between the two protection blocks.
  • the gap extends to connect with both sides of the transducer.
  • the protection component and the transducer are an integrated structure.
  • the ultrasound probe further includes a fixing block, and the FPC is fixed on the mounting base through the fixing block.
  • the fixing block has a fixing hole, and the FPC is fixed through the fixing hole of the fixing block.
  • the fixing hole of the fixing block is filled with two layers of solid glue, wherein a layer facing the transducer is a solid soft glue, and another layer facing away from the transducer is a solid hard glue.
  • the FPC includes a plurality of circuit layers, and at least a part of the plurality of circuit layers of the FPC is separated from each other in at least a part of the FPC.
  • the FPC includes a plurality of circuit layers, and at least a part of the plurality of circuit layers of the FPC is separated from each other in at least a portion of a bent area of the FPC.
  • an area where the FPC is located between the transducer and the mounting base is a swing area, and the FPC in the swing area is curved.
  • the FPC includes a plurality of circuit layers, and at least a part of the plurality of circuit layers of the FPC is separated from each other at least in the wobble region.
  • the FPC includes a plurality of circuit layers, and at least a part of the plurality of circuit layers of the FPC is separated from each other at least in a bent portion of the FPC located in the wobble region.
  • At least a part of the circuit layers separated from each other has a curvature radius and / or a length that are different from each other.
  • the curvature radius and / or length of at least a part of the circuit layers that are separated from each other sequentially increases or decreases.
  • the FPC includes a plurality of circuit layers, and the number of circuit layers of the FPC in at least a part of the FPC is less than the number of circuit layers in the remaining areas.
  • the thickness of the FPC in the swing region is at least thinner than the thickness of other regions.
  • the protection block is located between the transducer and the rotation shaft, and the FPC is bent.
  • the bend of the FPC is located on an extension of the rotation centerline of the rotation shaft, or the bend of the FPC is close to the rotation centerline of the rotation shaft. Extension cord.
  • the FPC extends through the extension line of the rotation centerline of the rotating shaft to the end face of the partial vertical transducer between the protection blocks.
  • the extension line of the centerline of the rotating shaft passes through the transducer, and the length of the FPC located between the transducer and the mounting base is greater than the transducer swinging to the extreme position and the FPC is swinging when the FPC is in a tight state. The length within the region.
  • At least one cylindrical stopper is further provided, and the FPC runs around the cylindrical stopper.
  • the cylindrical stopper has a plurality of, and is arranged between the protection block and the mounting seat at a linear interval.
  • An embodiment provides an ultrasonic probe, which includes a transducer, a rotating shaft, an FPC, and a mounting base.
  • the rotating shaft is rotatably mounted on the mounting base
  • the transducer is fixedly mounted on the rotating shaft
  • the FPC passes through the mounting base and the transducer.
  • the FPC includes a plurality of circuit layers, and at least a part of the plurality of circuit layers of the FPC is separated from each other in at least a part of the area of the FPC.
  • the FPC includes a plurality of circuit layers, and at least a part of the plurality of circuit layers of the FPC is separated from each other in at least a portion of a bent area of the FPC.
  • an area where the FPC is located between the transducer and the mounting base is a swing area, and the FPC in the swing area is curvedly disposed, and at least in a curved part of the FPC located in the swing area, in a plurality of circuit layers of the FPC At least a part of the circuit layers are separated from each other.
  • At least a part of the circuit layers separated from each other has a curvature radius and / or a length that are different from each other.
  • the curvature radius and / or length of at least a part of the circuit layers that are separated from each other sequentially increases or decreases.
  • the number of circuit layers of the FPC in at least a part of the FPC is less than the number of circuit layers in the remaining areas.
  • the thickness of the FPC in the oscillating region is at least thinner than the thickness of the other regions.
  • the protection block is provided, so that the FPC swings in a smaller area, which can reduce the swing amplitude of the FPC, ensure the stability of the FPC swing, and avoid the FPC. Bending fracture due to excessive swing amplitude and irregular swing.
  • FIG. 1 is a schematic structural diagram of an ultrasonic probe with a driving device in an embodiment
  • FIG. 2 is a schematic diagram of a partial structure of an ultrasound probe in an embodiment
  • FIG. 3 is a partial cross-sectional view of an ultrasound probe in an embodiment
  • FIG. 4 is a schematic structural diagram of an FPC in an embodiment
  • FIG. 5 is a cross-sectional view of a multilayer FPC of the same length in an embodiment
  • FIG. 6 is a cross-sectional view of a multilayer FPC with different lengths in an embodiment
  • FIG. 7 is a cross-sectional view of a multilayer FPC in another embodiment
  • FIG. 8 is a schematic diagram of a partial structure of an ultrasound probe in another embodiment
  • FIG. 9 is a partial cross-sectional view of an ultrasound probe in another embodiment
  • FIG. 10 is a schematic structural diagram of an ultrasonic probe rotated to an extreme position in another embodiment
  • FIG. 11 is a partial cross-sectional view of an ultrasonic probe having a plurality of cylindrical stop bars in another embodiment.
  • an ultrasonic probe (3D probe) is provided.
  • the transducer (acoustic head) on the ultrasonic probe can be swung and detected.
  • FPC flexible circuit board
  • a protection block is installed at the terminal of the transducer, and at the same time, the FPC can be fixed on the mounting seat, which limits the swing area of the FPC and can effectively protect the FPC.
  • the ultrasonic probe of this embodiment mainly includes a transducer 1, a rotating shaft 2, an FPC 3, and a mounting base 4, and the rotating shaft 2 is rotatably mounted on the upper end of the mounting base 4 through a bearing for energy conversion.
  • the lower end of the transducer 1 is fixed with a semi-circular fixed wheel 5.
  • the fixed wheel 5 is fixedly installed on the rotating shaft 2.
  • the transducer 1 is installed on the rotating shaft 2 through the fixed wheel 5, so that the rotating shaft 2 can drive the transducer 1 to swing.
  • a driving device 6 is installed at the lower end of the mounting base 4.
  • the driving device 6 includes a motor 61, a first pulley 62, a second pulley 63, and a conveyor belt 64.
  • the motor 61 is installed in the installation At the lower end of the seat 4, the first pulley 62 is connected to the motor 61 through a rotating shaft and a coupling, and the first pulley 62 may also be directly mounted on the output shaft of the motor 61.
  • the second pulley 63 is mounted on the rotating shaft 2, and the conveyor belt 64 is mounted on the first pulley 62 and the second pulley 63.
  • the motor 61 drives the rotating shaft 2 to rotate through the first pulley 62, the conveyor belt 64, and the second pulley 63, and the rotating shaft 2 drives the transducer 1 to swing through the fixed wheel 5, thereby realizing the swing driving of the transducer 1.
  • the FPC3 is disposed in the mounting base 4. One end of the FPC3 extends to be connected to the transducer 1. The FPC3 is used to transmit the signal of the transducer 1.
  • the ultrasonic probe of this embodiment further includes a protection component.
  • the protection component is a protection block 7, which is installed at a terminal of the transducer 1 (the energy conversion shown in FIG. 2).
  • the lower end of the device 1), the protection block 7 has a protection surface 71, and the FPC3 bends along the protection surface 71 of the protection block 7 to extend to the transducer 1, and the protection surface 71 of the protection block 7 acts as a limit for FPC3,
  • the FPC3 swinging with the transducer 1 is protected by the protective surface 71 of the protection block 7 during the swinging process of the transducer 1, so that the swinging of the FPC3 is more regular and the swinging amplitude is smaller.
  • the protection block 7 and the transducer 1 may be an integrated structure, and the protection block 7 is a part of the transducer 1.
  • the protection surface 71 of the protection block 7 is set as an arc surface, and the protection surface 71 of the protection block 7 forms a transition rounded corner, which can avoid damage to the FPC3 by the protection block 7 during the bending and swinging process.
  • two protection blocks 7 there are two protection blocks 7, two protection blocks 7 are symmetrically disposed at the lower end of the transducer 1, and the protection surfaces 71 of the two protection blocks 7 are disposed face to face in the middle of the terminals of the transducer 1, and two There is a certain threading gap between the protection surfaces 71 of the protection blocks 7.
  • the arrangement of the two protection blocks 7 can introduce two pieces of FPC3 to both sides of the transducer 1 at the same time.
  • one protection block 7 may be provided, the protection surface 71 of the protection block 7 may be located at the middle or one side of the terminal of the transducer 1, and one protection block 7 may be provided to place one FPC3 or multiple pieces side by side. FPC3 is introduced from the middle or one side of the terminals of the protection block 7 to one side of the protection block 7.
  • the ultrasound probe further includes a fixing block 8, which is installed on the threading hole of the mounting base 4.
  • the position of the fixing block 8 can be set on the transducer 1 as shown in FIG.
  • the left side may also be disposed at a position opposite to the middle or right side of the transducer 1.
  • the fixing block 8 is fixed on the mounting base 4 by screws, adhesives, or welding.
  • the fixing block 8 has a fixing hole 81, and the FPC 3 is fixed through the fixing hole 81.
  • the fixing hole 81 is filled with solid glue, which solidifies the FPC3 and seals the fixing hole 81.
  • Sealing the fixing hole 81 can effectively prevent the liquid from penetrating into the driving device 6 and other components from the fixing hole 81 when the transducer 1 is placed in the coupling liquid, and prevent the coupling liquid from contaminating and affecting the driving device 6 and other components. performance.
  • the solid glue in the fixing hole 81 is divided into two layers, facing the transducer 1 (close to the transducer).
  • the layer is a solid soft rubber 83.
  • the solid soft rubber 83 is usually a silicon rubber.
  • the other layer facing away from the transducer 1 (away from the transducer) is a solid hard rubber 82.
  • the solid hard rubber 82 is usually an epoxy rubber.
  • the FPC3 can be fixed in the fixing holes of the fixing block 8 with all solid hard rubber 82 or all solid soft rubber 83, although there is a risk of breakage when all solid hard rubber 82 is used, and all solid soft rubber 83 is used for fixing. Risk of instability, but fixing FPC3 with all solid hard rubber 82 or all solid soft rubber 83 can also play a certain role in fixing and sealing.
  • the protection block 7 and the fixing block 8 limit the FPC3 and reduce the FPC3.
  • the swing amplitude and irregularity of FPC3 make FPC3 swing more regularly in a smaller range, which can effectively prevent the bending break of FPC3.
  • an ultrasonic probe is provided, and the structure of the FPC3 is improved on the basis of the foregoing embodiment.
  • the transducer 1 Since the transducer 1 is composed of mutually independent array elements, the effective transmission of the signals of the transducer 1 requires many independent lines for transmission. With the increase of independent lines, if a single-chip FPC is used for signal transmission, usually a multilayer structure or an increased FPC width is used; and as the thickness of the FPC increases, the FPC delaminates during the swing process, resulting in circuit damage. And increasing the width of the FPC will lead to the size of the probe and increase the difficulty of the probe structure arrangement.
  • the transducer 1 of this embodiment is connected with two pieces of FPC3, each piece of FPC3 includes multiple circuit layers, and the two pieces of FPC3 pass through the fixing holes 81 of the fixing block 8 on the mounting base 4, and then along The protective surfaces 71 covering the two protective blocks 7 extend to both sides of the transducer 1.
  • the area between FPC3 located between the transducer 1 and the mounting base 4 is a swing area a.
  • the FPC3 extending from the fixing block 8 to the terminal of the transducer 1 will accompany the transducer 1 during the swing process. swing.
  • the thickness of the FPC3 in the swing area a is set to be thinner than that in other areas, and the FPC3 in the swing area a is set to be thinner, which will improve the bending performance of the FPC3.
  • FPC3 can reduce the thickness by removing the ground layer (protective layer) on the flexible board. Because the length of FPC3 in this area is limited, removing the ground layer will hardly affect the signal transmission.
  • the FPC3 can be provided thinner only at the bending and swinging portion, ensuring the service life of the bending portion.
  • the number of circuit layers of the FPC3 in the wobble region a may also be set smaller than the number of circuit layers in the remaining regions, so as to improve the flexibility of the FPC3 in the wobble region a.
  • the FPC3 in the swing area a is set to be separated from each other independently.
  • the area other than the swing area a of FPC3 is a structure in which five circuit layers are combined together. Therefore, during the swing process of the FPC3 in the swing area a, the five circuit layers in the single-layer structure are separated from each other independently and do not interact with each other, thereby ensuring signal transmission.
  • the five circuit layers of the FPC3 can be set with different curvature radii or / and different lengths according to the degree of bending.
  • the curvature radius and arc length of the five circuit layers are set in increments along the outer direction of the bending arc.
  • the swing area a and the FPC 3 (through the mounting seat 4 to the end portion connected to the transducer) extending into the transducer 1 may also be set to each other.
  • the 5 circuit layers separated separately, and the other parts are arranged into a multilayer structure in which 5 circuit layers are compounded together.
  • Such a setting is convenient for the production and assembly of the FPC3.
  • the FPC3 can be bent, and the FPC3 at the end is cut or extended accordingly to meet the connection with the transducer 1.
  • the bends of the FPC3 located in the swing region are set as five circuit layers separated from each other, and the other parts are arranged in a multi-layered structure to ensure that the FPC3 is not damaged by bending.
  • the FPC3 may also be provided as a single chip, and the single-chip FPC3 also includes multiple circuit layers. As shown in FIG. 4, the single-layer multi-layer FPC is bent and extended to be connected to one side of the transducer 1. FPC3 can also be four pieces, two pieces of FPC3 are connected side by side to transducer 1 and the other two pieces are connected side by side to transducer 1, and FPC3 can also include four or six circuit layers. FPC3 can set the corresponding number of slices and layers according to the needs of use.
  • the ultrasonic probe provided in this embodiment sets the structure of the FPC3 in a stepped shape, partially multilayered (multiple circuit layers are compositely bonded) and partially single-layered (multiple circuit layers are not compositely bonded), and there are parts that require bending.
  • the single-layer structure is provided, and the non-bent portion is provided in a multi-layer structure, which can ensure the bending characteristics of FPC3 and avoid bending fracture of FPC3.
  • an ultrasound probe is provided.
  • the ultrasound probe of this embodiment improves the layout of the FPC3 based on the above embodiment.
  • the ultrasound probe mainly includes two structures, the first structure is that there is a certain distance between the rotating shaft 2 and the transducer 1, and the second structure is that the extension line of the rotation centerline of the rotating shaft 2 passes through the transducer 1.
  • the ultrasonic probe of this embodiment has a first structure.
  • the FPC 3 may be arranged to penetrate into the mounting base 4 from different angles and extend from different positions into the interior of the transducer 1 according to different positions of the protection block 7 and the fixing block 8.
  • the FPC 3 itself is arranged in a curved layout.
  • the fixed block 8 is arranged on the left side of the transducer 1, the two protection blocks 7 are symmetrically arranged on the terminals of the transducer 1, and the protection surfaces 71 of the two protection blocks 7 are arranged face to face on the wiring.
  • the bend of the FPC3 is located on the extension of the rotation centerline of the rotating shaft 2.
  • the bent FPC3 is vertical.
  • the FPC 3 passes through the extension line of the rotation centerline of the rotating shaft 2 and is bent to extend between the protection blocks 7 and is located in the plane F.
  • the FPC 3 is bent and provided in an arc shape at an extension of the rotation center line of the rotation shaft 2.
  • the bend of FPC3 is set close to the extension line of the rotation centerline of the rotation shaft 2.
  • the bend of FPC3 is staggered from the extension line of the rotation centerline of the rotation shaft 2 by a small distance.
  • the FPC3 can also achieve the bending Swing everywhere.
  • the bent FPC3 extends to a part of the protection block 7 perpendicular to the terminal end face of the transducer 1, so that the rotating shaft 2 rotates.
  • FPC3, which is bent at the extension of the centerline, can oscillate together with transducer 1.
  • FPC3 is only bent and deformed at the bend at the centerline of rotation of the rotation shaft 2, and other areas are basically not deformed, so the swing of FPC3 is regular. Periodic swing, swing deformation only in one place, can effectively avoid bending fracture of FPC3.
  • the FPC3 can be directly bent to both sides of the transducer 1; and when the FPC3 is directly bent When folded to both sides of the transducer 1, the FPC 3 may also extend from the middle portion of the mounting base 4 to the extension line position of the rotation center line of the rotating shaft 2.
  • an ultrasound probe is provided.
  • the ultrasound probe of this embodiment improves the layout of the FPC3 based on the above embodiment.
  • the ultrasound probe mainly includes two structures, the first structure is that there is a certain distance between the rotating shaft 2 and the transducer 1, and the second structure is that the extension line of the rotation centerline of the rotating shaft 2 passes through the transducer 1.
  • the ultrasound probe of this embodiment has a second structure.
  • the ultrasonic probe in this embodiment is limited by space and structure.
  • the extension line of the centerline of the rotating shaft 2 passes through the transducer 1, and the protection block 7 cannot be installed on the rotating shaft 2 and the transducer.
  • the swinging rule of the FPC 3 is different from the above embodiment.
  • the length of FPC3 between the transducer 1 and the fixed block 8 is greater than that when the transducer swings to the extreme position and the FPC is in a tight state.
  • the length of the FPC in the swing area that is, when the transducer 1 swings to the maximum angular position, the FPC 3 is not in a stretched state.
  • the position of the fixed block 8 it can be made as close to the transducer 1 as possible to reduce the bending change of the FPC 3 during the swing.
  • adding a cylindrical stopper 9 between the protection block 7 and the fixing block 8 can ensure the position certainty of the FPC 3 during the movement.
  • a plurality of cylindrical barrier rods 9 may be provided, for example, four.
  • the four cylindrical barrier rods 9 are arranged between the protection block 7 and the fixed block 8 in a linear interval, and the FPC 3 can walk around the multiple cylindrical barrier rods 9. Line, which can further improve the certainty of FPC3.
  • the transducer 1 of this embodiment is connected with two pieces of FPC 3, and the two pieces of FPC are respectively routed around the cylindrical stopper 9 in the process of extending from the protection block 7 to the fixing block 8, and the two pieces of FPC are not mutually connected.
  • Crossing the cables allows the FPC3 to swing more gently, improving the stability of the swing.
  • the mounting base 4 has a side wall extending to the protection block 7.
  • the extension of the mounting base 4 is used for mounting the transducer 1 and the rotating shaft 2.
  • the FPC 3 and the cylindrical stopper 9 are located around the side wall of the mounting base 4.
  • the annular side wall of the mounting seat 4 also limits the FPC3 to a certain extent and plays a role of sealing protection.
  • the ultrasound probe in this embodiment is preset with a sufficient length of FPC3 to ensure that the FPC3 is not stretched during the swing process, and then the spatial arrangement of the FPC3 can ensure the stability of the exercise cycle.
  • the FPC3 can also pass the above-mentioned embodiment.
  • the size and thickness settings improve the bending characteristics of FPC3 and can improve the stability of the exercise cycle.
  • an ultrasonic probe is provided.
  • the ultrasonic probe of this embodiment improves the structure of the FPC3.
  • At least a part of the FPC3 is provided as several circuit layers separated from each other to avoid bending and fracture of the FPC3. .
  • the ultrasound probe includes a transducer 1, a rotating shaft 2, an FPC 3, and a mounting base 4.
  • the rotating shaft 2 is rotatably mounted on an upper end of the mounting base 4 through a bearing, and a semicircle is fixed to a lower end of the transducer 1.
  • the fixed wheel 5 is fixedly installed on the rotating shaft 2, and the transducer 1 is installed on the rotating shaft 2 through the fixed wheel 5, so that the rotating shaft 2 can drive the transducer 1 to swing.
  • transducer 1 rotating shaft 2, FPC3 and mounting base 4
  • the rotating shaft 2 is rotatably mounted on the upper end of the mounting base 4 through a bearing
  • the lower end of the transducer 1 is fixed with a semicircular fixed wheel 5
  • the fixed wheel 5 is fixedly mounted on the
  • the transducer 1 is mounted on the rotating shaft 2 through a fixed wheel 5, so that the rotating shaft 2 can drive the transducer 1 to swing.
  • the transducer 1 Since the transducer 1 is composed of mutually independent array elements, the effective transmission of the signals of the transducer 1 requires many independent lines for transmission. With the increase of independent lines, if a single-chip FPC is used for signal transmission, usually a multilayer structure or an increased FPC width is used; and as the thickness of the FPC increases, the FPC delaminates during the swing process, resulting in circuit damage. And increasing the width of the FPC will lead to the size of the probe and increase the difficulty of the probe structure arrangement.
  • the transducer 1 of this embodiment is connected with two pieces of FPC3, each piece of FPC3 includes multiple circuit layers, and the two pieces of FPC3 pass through the fixing holes 81 of the fixing block 8 on the mounting base 4, and then along The protective surfaces 71 covering the two protective blocks 7 extend to both sides of the transducer 1.
  • the area between FPC3 located between the transducer 1 and the mounting base 4 is a swing area a.
  • the FPC3 extending through the fixing block 8 to the terminal of the transducer 1 will follow the transducer 1 during the swing process. Swing together.
  • the thickness of the FPC3 in the swing area a is set to be thinner than that in other areas, and the FPC3 in the swing area a is set to be thinner, which will improve the bending performance of the FPC3.
  • FPC3 can reduce the thickness by removing the ground layer (protective layer) on the flexible board. Because the length of FPC3 in this area is limited, removing the ground layer will hardly affect the signal transmission.
  • the FPC3 can be set thinner only in the curved and oscillating portion, ensuring the service life of the curved portion; in other embodiments, the number of FPC3 circuit layers in the oscillating area a can also be set smaller than the rest The number of circuit layers in the region to improve the flexibility of the FPC3 in the wobble region a.
  • the FPC3 in the swing area a is set to 5 circuits that are separated from each other.
  • Layer, FPC3 other than the swing area a is a multilayer structure with five circuit layers compounded together. Therefore, during the swing process of the FPC3 in the swing area a, the five circuit layers in the single-layer structure do not interact with each other, thereby ensuring signal transmission.
  • the five circuit layers of the FPC3 can be set with different curvature radii or / and different lengths according to the degree of bending.
  • the curvature radius and arc length of the five circuit layers can be set in increments along the outer direction of the bending arc.
  • the swing area a and the FPC 3 (through the mounting seat 4 to the end portion connected to the transducer) extending into the transducer 1 may also be set to each other.
  • the 5 circuit layers separated separately, and the other parts are arranged into a multilayer structure in which 5 circuit layers are compounded together.
  • Such a setting is convenient for the production and assembly of the FPC3.
  • the FPC3 can be bent, and the FPC3 at the end is cut or extended accordingly to meet the connection with the transducer 1.
  • only the bends of the FPC3 located in the swing area are set to 5 circuit layers separated from each other, and the other parts are set to a multilayer structure in which the 5 circuit layers are combined together, which can also ensure that the FPC3 is not affected by Bending damage.
  • the FPC3 may also be provided as a single piece, and the single-piece FPC3 also includes a plurality of circuit layers. As shown in FIG. 4, the single-piece multilayer FPC is bent and extended to be connected to one side of the transducer 1.
  • FPC3 can also be four pieces, two pieces of FPC3 are connected side by side to transducer 1 and the other two pieces are connected side by side to transducer 1, and FPC3 can also include four or six circuit layers.
  • FPC3 can set the corresponding number of slices and layers according to the needs of use.
  • the ultrasonic probe provided in this embodiment sets the structure of the FPC3 in a stepped shape, partially multilayered (multiple circuit layers are compositely bonded) and partially single-layered (multiple circuit layers are not compositely bonded), and there are parts that require bending.
  • the single-layer structure is provided, and the non-bent portion is provided in a multi-layer structure, which can ensure the bending characteristics of FPC3 and avoid bending fracture of FPC3.
  • the ultrasonic probe of this embodiment only improves the structure of the FPC3, it can also extend the long life of the FPC.

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Abstract

一种超声探头，包括换能器（1）、转轴（2）、FPC（3）和安装座（4），转轴（2）可旋转的安装在安装座（4）上，换能器（1）固定安装在转轴（2）上，FPC（3）穿过安装座（4）与换能器（1）连接；换能器（1）的接线端设有保护部件（7），保护部件（7）用于隔档限位FPC（3）的摆动。由于设置了保护部件（7），限位了FPC（3）的空间位置，使得FPC（3）在较小的区域内摆动，降低了FPC（3）的摆动幅度，保证了FPC（3）摆动的稳定性，避免了FPC（3）因摆动幅度过大和摆动无规律导致的弯曲断裂。

Description

超声探头 技术领域
本申请涉及医疗器械技术领域，具体涉及一种超声探头。
背景技术
具有三维成像功能的超声波探头称为3D机械探头，其内部一般有作为驱动动力源的步进电机，步进电机在信号控制下通过传动系统驱动换能器(声头)在一定角度范围内摆动。换能器的信号的发射和接收通常采用柔性电路板或声头线(微型线缆)来传递。传统的凸阵、线阵、相控阵探头，换能器在使用过程中，其探头内部信号传输线路相对静止，通常传统的FPC可满足要求。
但3D机械探头的换能器(声头)在使用过程中，在一定角度范围内摆动，换能器信号的发射和接收的线缆会随换能器一起摆动，传统柔性电路板(线缆)摆动较为紊乱，不能满足使用的寿命要求，在使用过程中出现断裂，导致探头损坏。
现有技术通常采用声头线(微型线缆)连接换能器转动部分，保证换能器信号的有效传递，但声头线焊接技术要求高，焊接工艺复杂，设备要求高，成本高且交期长，性价比低。
发明内容
一种实施例中，提供一种超声探头,包括换能器、转轴、FPC和安装座，转轴可旋转的安装在安装座上，换能器固定安装在转轴上，FPC穿过安装座与换能器连接；换能器的接线端设有保护部件，保护部件用于隔档限位FPC的摆动。
一种实施例中，保护部件为保护块，保护块具有圆弧形的保护面，FPC沿保护块的保护面走线。
一种实施例中，保护块具有一块，FPC沿着保护块的保护面弯曲延伸至与换能器的一侧连接。
一种实施例中，保护块具有对称设置的两个，两个保护块的保护面面对面设置，并且两个保护块的保护面之间具有走线的间隙，FPC穿过两个保护块之间的间隙延伸至与换能器的两侧连接。
一种实施例中，保护部件与换能器为一体式结构。
一种实施例中，超声探头还包括固定块，FPC通过固定块固定在安装座上。
一种实施例中，固定块具有固定孔，FPC穿设固定在固定块的固定孔内。
一种实施例中，固定块的固定孔内填充有两层固态胶，其中，面向换能器的一层为固态软胶，背向换能器的另一层为固态硬胶。
一种实施例中，FPC包含多个电路层，并且在FPC的至少一部分区域内FPC的所述多个电路层中的至少一部分电路层相互分离。
一种实施例中，FPC包含多个电路层，并且至少在FPC的至少一部分弯曲区域内FPC的所述多个电路层中的至少一部分电路层相互分离。
一种实施例中，FPC位于换能器和安装座之间的区域为摆动区域，摆动区域内的FPC弯曲设置。
一种实施例中，FPC包括多个电路层，并且至少在摆动区域内，FPC的多个电路层中的至少一部分电路层相互分离。
一种实施例中，FPC包括多个电路层，并且至少在FPC的位于摆动区域内的弯曲部分，FPC的所述多个电路层中的至少一部分电路层相互分离。
一种实施例中，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度彼此不同。
一种实施例中，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度依次递增或递减。
一种实施例中，FPC包含多个电路层，并且在所述FPC的至少一部分区域内所述FPC的电路层的数量小于其余区域内的电路层的数量。
一种实施例中，摆动区域内的FPC至少在弯曲处的厚度薄于其他区域的厚度。
一种实施例中，保护块位于换能器和转轴之间，FPC弯折设置，FPC的弯折处位于转轴的旋转中心线的延长线上，或者FPC的弯折处靠近转轴的旋转中心线的延长线。
一种实施例中，FPC穿过转轴的旋转中心线的延长线延伸至保护块之间的部分垂直换能器的端面。
一种实施例中，转轴的中心线的延长线穿过换能器，FPC位于换能器和安装座之间内的长度大于换能器摆动到极限位置且FPC处于绷紧 状态下FPC在摆动区域内的长度。
一种实施例中，还设有至少一个圆柱挡杆，FPC围绕圆柱挡杆走线。
一种实施例中，圆柱挡杆具有多个，沿直线间隔排列在保护块与安装座之间。
一种实施例中提供了一种超声探头,包括换能器、转轴、FPC和安装座，转轴可旋转的安装在安装座上，换能器固定安装在转轴上，FPC穿过安装座与换能器连接；FPC包含多个电路层，并且在FPC的至少一部分区域内FPC的多个电路层中的至少一部分电路层相互分离。
一种实施例中，FPC包含多个电路层，并且至少在FPC的至少一部分弯曲区域内FPC的所述多个电路层中的至少一部分电路层相互分离。
一种实施例中，FPC位于换能器和安装座之间的区域为摆动区域，摆动区域内的FPC弯曲设置，并且至少在FPC的位于摆动区域内的弯曲部分，FPC的多个电路层中的至少一部分电路层相互分离。
一种实施例中，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度彼此不同。
一种实施例中，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度依次递增或递减。
一种实施例中，在FPC的至少一部分区域内FPC的电路层的数量小于其余区域内的电路层的数量。
一种实施例中，摆动区域内的FPC至少在弯曲部分的厚度薄于其他区域的厚度。
依据上述实施例的超声探头，由于设置了保护块，限位了FPC的空间位置，使得FPC在较小的区域内摆动，可降低FPC的摆动幅度，保证了FPC摆动的稳定性，避免了FPC因摆动幅度过大和摆动无规律导致的弯曲断裂。
附图说明
图1为一种实施例中带驱动装置的超声探头的结构示意；
图2为一种实施例中超声探头的局部结构示意；
图3为一种实施例中超声探头的局部剖视图；
图4为一种实施例中FPC的结构示意图；
图5为一种实施例中同长度多层FPC的剖视图；
图6为一种实施例中不同长度多层FPC的剖视图；
图7为另一种实施例中多层FPC的剖视图；
图8为另一种实施例中超声探头的局部结构示意；
图9为另一种实施例中超声探头的局部剖视图；
图10为另一种实施例中超声探头旋转至极限位置状态下的结构示意图；
图11为另一种实施例中具有多个圆柱挡杆的超声探头的局部剖视图。
具体实施方式
在本发明实施例中提供了一种超声探头(3D探头)，本超声探头上的换能器(声头)可摆动探测，为了保护与换能器连接的FPC(柔性电路板)，防止FPC的弯曲断裂，本发明在换能器的接线端安装有保护块，同时还可将FPC固定在安装座上，限定了FPC的摆动区域，能够有效的保护FPC。
一种实施例，如图1所示，本实施例的超声探头主要包括换能器1、转轴2、FPC3和安装座4，转轴2通过轴承可旋转的安装在安装座4的上端，换能器1的下端固定有半圆的固定轮5，固定轮5固定安装在转轴2上，换能器1通过固定轮5安装在转轴2上，从而转轴2可带动换能器1摆动。
为了驱动转轴2带动换能器1摆动，在安装座4的下端安装有驱动装置6，驱动装置6包括电机61、第一带轮62、第二带轮63和传送带64，电机61安装在安装座4的下端，第一带轮62通过转轴和联轴器与电机61连接，第一带轮62也可以直接安装在电机61的输出轴上。第二带轮63安装在转轴2上，传送带64安装在第一带轮62和第二带轮63上。电机61通过第一带轮62、传送带64和第二带轮63驱动转轴2转动，转轴2再通过固定轮5带动换能器1摆动，从而实现对换能器1的摆动驱动。
FPC3穿设在安装座4中，FPC3的一端延伸至与换能器1连接，FPC3用于传输换能器1的信号。
如图2和3所示，本实施例的超声探头还包括保护部件，本实施例中保护部件为保护块7，保护块7安装在换能器1的接线端(图2所示的换能器1的下端)，保护块7具有一个保护面71，FPC3沿着保护块7 的保护面71走线弯曲延伸至换能器1，保护块7的保护面71对FPC3起限位的作用，使得换能器1在摆动过程中，随换能器1一起摆动的FPC3被保护块7的保护面71隔档保护，使得FPC3的摆动更为规律和摆动的幅度更小。在其他实施例中，保护块7与换能器1可为一体式结构，保护块7为换能器1的一部分。本实施例中，保护块7的保护面71设置成圆弧面，保护块7的保护面71形成过渡圆角，可避免在弯曲摆动过程中保护块7对FPC3的损坏。
本实施例中，保护块7具有两个，两个保护块7对称设置在换能器1的下端，两个保护块7的保护面71面对面设置在换能器1的接线端中部，并且两个保护块7的保护面71之间具有一定穿线的间隙。两个保护块7的设置，可同时将两片FPC3引入到换能器1的两侧。
在其他实施例中，保护块7可设置一块，保护块7的保护面71可位于换能器1的接线端的中部或一侧，一个保护块7的设置，可将一片FPC3，或多片并排的FPC3从保护块7的接线端的中部或一侧引入至保护块7的一侧面。
如图3所示，本实施例中，超声探头还包括固定块8，固定块8安装在安装座4的穿线孔上，固定块8的位置可如图3所示设置在换能器1的左侧，也可设置在换能器1的中部或右侧相对的位置。固定块8通过螺钉、粘接或焊接固定在安装座4上，固定块8具有固定孔81，FPC3穿设固定在固定孔81内。为了将FPC3固定和密封在固定孔81内，固定孔81内填充有固态胶，固态胶将FPC3固定住及将固定孔81密封。对固定孔81进行密封可有效防止换能器1置于耦合液体中探测时液体从固定孔81渗入到驱动装置6和其他部件内，防止耦合液体对驱动装置6和其他部件的污染及影响其性能。
摆动过程中，FPC3会有微弱运动，全部采用硬胶固定FPC3存在断裂的风险，为了保护FPC3，固定孔81内的固态胶分为两层，面向换能器1(靠近换能器)的一层为固态软胶83，固态软胶83通常采用硅胶等，背向换能器1(远离换能器)的另一层为固态硬胶82，固态硬胶82通常采用环氧胶等。
在其他实施例中，固定块8的固定孔中可采用全部固态硬胶82或者全部固态软胶83固定FPC3，虽然采用全部固态硬胶82存在断裂的风险，及采用全部固态软胶83存在固定不稳定的风险，但采用全部固态硬胶82或者全部固态软胶83固定FPC3同样能够起到一定的固定和密封 作用。
本实施例的超声探头，由于在换能器1的接线端安装有保护块7，在安装座4上安装有固定块8，保护块7和固定块8对FPC3进行了限位，减低了FPC3的摆动幅度及无规律性，使得FPC3在较小的范围内做更为规律的摆动，可有效防止FPC3的弯曲断裂。
一种实施例中，提供了一种超声探头，本实施例的超声探头在上述实施例的基础上对FPC3的结构进行了改进。
由于换能器1是由相互独立的阵元组成，因此换能器1信号的有效传递需要很多独立的线路进行传递。随着独立线路的增加，如果采用单片的FPC进行信号的传递，通常采用多层结构或加大FPC的宽度；而随着FPC厚度的增加，摆动过程中，FPC发生分层，导致线路损坏，并且加大FPC的宽度，会导致探头的尺寸，加大了探头结构布置的难度。
如图3所示，本实施例的换能器1连接有两片FPC3，每片FPC3包括多个电路层，两片FPC3共同穿过安装座4上固定块8的固定孔81，再分别沿着两个保护块7的保护面71延伸至换能器1的两侧。如图4所示，FPC3位于换能器1和安装座4之间的区域为摆动区域a，从固定块8延伸至换能器1接线端的FPC3在摆动过程中会随着换能器1一同摆动。
如图4所示，本实施例中将摆动区域a内FPC3的厚度设置成薄于其他区域内的厚度，将摆动区域a的FPC3设置得更薄，将改善FPC3的弯曲性能。FPC3可通过将柔性板上的地层(保护层)去掉以降低厚度，由于该区域段FPC3的长度有限，去掉地层几乎不会影响信号的传输。在其他实施例中，FPC3可仅在弯曲摆动的部分设置的更薄，确保了弯曲部分的使用寿命。在其他实施例中，也可将摆动区域a内FPC3的电路层的数量设置成小于其余区域内的电路层的数量，以实现提高摆动区域a内FPC3的柔性。
本实施例中，为了防止具有多个电路层的FPC3在摆动过程中发生分层，导致线路损坏，如图5所示，本实施例中将摆动区域a内的FPC3设置成相互独立分离开的5个电路层，FPC3除摆动区域a外的其他区域为5个电路层复合在一起的结构。从而摆动区域a内的FPC3在摆动过程中，单层结构中的5个电路层相互独立分离开相互之间不发生作用，保证了信号传输。另外，考虑到FPC3弯曲设置中，存在弯曲半径不一致，如图6所示，在摆动区域a内，FPC3的5个电路层可根据弯曲程度 设置不同的曲率半径或/和不同的长度，如可将5个电路层的曲率半径和弧形长度沿弯曲弧度外侧方向依次递增设置。
在其他实施例中，如图7所示，也可将摆动区域a及延伸至换能器1内的FPC3(穿出安装座4一直延伸至与换能器连接的端部部分)设置为相互独立分离开的5个电路层，其他部分设置成5个电路层复合在一起的多层结构。如此设置便于FPC3的生产和装配，FPC3可弯曲情况，对末端的FPC3进行相应裁剪或延长以满足与换能器1的连接。
在其他实施例中，将位于摆动区域内FPC3的弯曲处设置为相互独立分离开的5个电路层，其他部分设置成复合在一起的多层结构，也可保证FPC3不被弯曲损坏。
在其他实施例中，FPC3也可设置成单片，单片的FPC3也包括多个电路层，如图4所示，单片的多层FPC弯曲延伸至与换能器1的一侧连接。FPC3也可为四片，两片FPC3并排连接至与换能器1的一侧，另外两片并排连接至换能器1的另一侧，FPC3也可包括4个或6个电路层。FPC3可根据使用需要设置相应的片数和层数。
本实施例提供的超声探头，将FPC3的结构设置成阶梯状，局部多层(多个电路层复合粘接)和局部单层(多个电路层未复合粘接)，有弯折要求的部分设置成单层结构，无弯折的部分设置成多层结构，可保证FPC3的弯曲特性，可避免FPC3的弯曲断裂。
一种实施例中，提供了一种超声探头，本实施例的超声探头在上述实施例的基础上对FPC3的布局进行了改进。
超声探头主要包括两种结构，第一种结构为转轴2和换能器1之间具有一定间距，第二结构为转轴2的旋转中心线的延长线穿过换能器1。本实施例的超声探头为第一结构。
如上述实施例所示，FPC3可根据保护块7和固定块8的位置不同，可将FPC3布局成从不同的角度穿入到安装座4，及从不同位置延伸到换能器1的内部。本实施例在保护块7和固定块8布局的基础上，对FPC3自身进行了弯曲布局。
如图3所示，固定块8布局在换能器1的左侧，两个保护块7对称布局在换能器1的接线端，并且两个保护块7的保护面71面对面的设置在接线端的中部，从而FPC3从换能器1的左侧穿入，穿过固定块8的FPC3折弯设置，FPC3的弯折处位于转轴2的旋转中心线的延长线上， 弯折后的FPC3竖直延伸至保护块7，再沿着保护块7的保护面71弯曲延伸至换能器1的侧面，其中FPC3穿过转轴2的旋转中心线的延长线折弯后延伸至保护块7之间的部分垂直于换能器1的接线端端面，如图3所示，FPC3穿过转轴2的旋转中心线的延长线折弯后延伸至保护块7之间的部分位于平面F内。并且，FPC3在转轴2的旋转中心线的延长线处弯折设置成圆弧弯曲。
在其他实施例中，FPC3的折弯处靠近转轴2的旋转中心线的延长线设置，FPC3的折弯处与转轴2的旋转中心线的延长线错开一小段距离，FPC3也能够实现在折弯处摆动。
本实施的超声探头，由于FPC3在转轴2的旋转中心线的延长线处弯折设置，弯折后的FPC3延伸至保护块7的部分垂直换能器1的接线端端面，使得在转轴2旋转中心线的延长线处弯折后的FPC3与换能器1能够一同摆动，FPC3仅在位于转轴2旋转中心线处的弯折处弯曲变形，其他区域基本不变形，从而FPC3的摆动为规律的周期摆动，摆动变形仅在一处，可有效避免FPC3的弯曲断裂。
在其他实施例中，在保证FPC3在转轴2的旋转中心线的延长线上或附近位置处弯折设置的前提下，FPC3可直接弯折至换能器1的两侧；并且当FPC3直接弯折至换能器1的两侧时，FPC3也可以从安装座4的中部延伸至转轴2的旋转中心线的延长线位置。
一种实施例中，提供了一种超声探头，本实施例的超声探头在上述实施例的基础上对FPC3的布局进行了改进。
超声探头主要包括两种结构，第一种结构为转轴2和换能器1之间具有一定间距，第二结构为转轴2的旋转中心线的延长线穿过换能器1。本实施例的超声探头为第二结构。
如图8和图9所示，本实施例中的超声探头，受空间和结构的限制，转轴2的中心线的延长线穿过换能器1，保护块7无法安装在转轴2和换能器1之间，故FPC3的摆动规律与上述实施例不同。如图10所示，为了保证FPC3在摆动过程中不被拉断及破损，FPC3位于换能器1和固定块8之间的长度大于在换能器摆动到极限位置且FPC处于绷紧状态的情况下FPC在所述摆动区域内的长度，即当换能器1摆动到最大角度位置时，FPC3为不是处于被拉伸绷紧的状态。在固定块8的位置设计中，可使其尽可能靠近换能器1，减小摆动过程中FPC3的弯曲变化。
如图9和图10所示，在保护块7和固定块8之间增加圆柱挡杆9，可以保证FPC3在运动过程中的位置确定性。如图11所示，圆柱挡杆9可设置多个，例如4个，4个圆柱挡杆9沿直线间隔排列在保护块7和固定块8之间，FPC3可围绕多个圆柱挡杆9走线，可进一步提高FPC3的确定性。
如图11所示，本实施例的换能器1连接有两片FPC3，两片FPC从保护块7延伸至固定块8的过程中分别围绕圆柱挡杆9走线，并且两片FPC不相互交叉走线，可使得FPC3进行更为平缓的摆动，提高了摆动的稳定性。
如图11所示，安装座4具有延伸至保护块7的侧壁，安装座4的延伸部分用于安装换能器1和转轴2，FPC3和圆柱挡杆9位于安装座4的侧壁围合的腔体内，安装座4的环形侧壁也对FPC3进行一定限位作用，并起密封保护作用。
本实施例中的超声探头，预设足够长度的FPC3，可确保FPC3在摆动过程中不受拉伸作用，再通过FPC3的空间布置，可保证运动周期的稳定，FPC3也可通过上述实施例的大小厚度的设置，改善FPC3的弯曲特性，可提高运动周期的稳定。
一种实施例中，提供了一种超声探头，本实施例的超声探头对FPC3的结构进行了改进，其中，至少部分FPC3设置成相互独立分离开的若干个电路层，以避免FPC3的弯曲断裂。
具体的，如图1所示，超声探头包括换能器1、转轴2、FPC3和安装座4，转轴2通过轴承可旋转的安装在安装座4的上端，换能器1的下端固定有半圆的固定轮5，固定轮5固定安装在转轴2上，换能器1通过固定轮5安装在转轴2上，从而转轴2可带动换能器1摆动。包括换能器1、转轴2、FPC3和安装座4，转轴2通过轴承可旋转的安装在安装座4的上端，换能器1的下端固定有半圆的固定轮5，固定轮5固定安装在转轴2上，换能器1通过固定轮5安装在转轴2上，从而转轴2可带动换能器1摆动。
由于换能器1是由相互独立的阵元组成，因此换能器1信号的有效传递需要很多独立的线路进行传递。随着独立线路的增加，如果采用单片的FPC进行信号的传递，通常采用多层结构或加大FPC的宽度；而随着FPC厚度的增加，摆动过程中，FPC发生分层，导致线路损坏，并且加大FPC的宽度，会导致探头的尺寸，加大了探头结构布置的难度。
如图3所示，本实施例的换能器1连接有两片FPC3，每片FPC3包括多个电路层，两片FPC3共同穿过安装座4上固定块8的固定孔81，再分别沿着两个保护块7的保护面71延伸至换能器1的两侧。如图4所示，FPC3位于换能器1和安装座4之间的区域为摆动区域a，穿过固定块8延伸至换能器1接线端的FPC3在摆动过程中会随着换能器1一同摆动。
如图4所示，本实施例中将摆动区域a内FPC3的厚度设置成薄于其他区域内的厚度，将摆动区域a的FPC3设置得更薄，将改善FPC3的弯曲性能。FPC3可通过将柔性板上的地层(保护层)去掉以降低厚度，由于该区域段FPC3的长度有限，去掉地层几乎不会影响信号的传输。在其他实施例中，FPC3可仅在弯曲摆动的部分设置的更薄，确保了弯曲部分的使用寿命；在其他实施例中，也可将摆动区域a内FPC3的电路层的数量设置成小于其余区域内的电路层的数量，以实现提高摆动区域a内FPC3的柔性。
本实施例中，为了防止多层的FPC3在摆动过程中发生分层，导致线路损坏，如图5所示，本实施例中将摆动区域a内的FPC3设置成相互独立分离开的5个电路层，FPC3除摆动区域a外的其他区域为5个电路层复合在一起的多层结构。从而摆动区域a内的FPC3在摆动过程中，单层结构中的5个电路层相互之间不发生作用，保证了信号传输。另外，考虑到多层FPC3弯曲设置中，存在弯曲半径不一致，如图6所示，在摆动区域a内，FPC3的5个电路层可根据弯曲程度设置不同的曲率半径或/和不同的长度，如可将5个电路层的曲率半径和弧形长度沿弯曲弧度外侧方向依次递增设置。
在其他实施例中，如图7所示，也可将摆动区域a及延伸至换能器1内的FPC3(穿出安装座4一直延伸至与换能器连接的端部部分)设置为相互独立分离开的5个电路层，其他部分设置成5个电路层复合在一起的多层结构。如此设置便于FPC3的生产和装配，FPC3可弯曲情况，对末端的FPC3进行相应裁剪或延长以满足与换能器1的连接。
在其他实施例中，仅将位于摆动区域内FPC3的弯曲处设置为相互独立分离开的5个电路层，其他部分设置成5个电路层复合在一起的多层结构，也可保证FPC3不被弯曲损坏。
在其他实施例中，FPC3也可设置成单片，单片的FPC3也包括多个电路层，如图4所示，单片的多层FPC弯曲延伸至与换能器1的一侧连 接。FPC3也可为四片，两片FPC3并排连接至与换能器1的一侧，另外两片并排连接至换能器1的另一侧，FPC3也可包括4个或6个电路层。FPC3可根据使用需要设置相应的片数和层数。
本实施例提供的超声探头，将FPC3的结构设置成阶梯状，局部多层(多个电路层复合粘接)和局部单层(多个电路层未复合粘接)，有弯折要求的部分设置成单层结构，无弯折的部分设置成多层结构，可保证FPC3的弯曲特性，可避免FPC3的弯曲断裂。
本实施例的超声探头，虽然仅对FPC3的结构进行改进，同样可延长FPC较长的使用寿命。
以上应用了具体个例对本发明进行阐述，只是用于帮助理解本发明，并不用以限制本发明。对于本领域的一般技术人员，依据本发明的思想，可以对上述具体实施方式进行变化。

Claims (28)

  1. 一种超声探头,其特征在于，包括换能器、转轴、FPC和安装座，所述转轴可旋转的安装在所述安装座上，所述换能器固定安装在所述转轴上，所述FPC穿过所述安装座与所述换能器连接；所述换能器的接线端设有保护部件，所述保护部件用于隔档限位所述FPC的摆动。
  2. 如权利要求1所述的超声探头，其特征在于，所述保护部件为保护块，所述保护块具有圆弧形的保护面，所述FPC沿所述保护块的保护面走线。
  3. 如权利要求2所述的超声探头，其特征在于，所述保护块具有一块，所述FPC沿着所述保护块的保护面弯曲延伸至与所述换能器的一侧连接。
  4. 如权利要求2所述的超声探头，其特征在于，所述保护块具有对称设置的两个，两个所述保护块的保护面面对面设置，并且两个所述保护块的保护面之间具有走线的间隙，所述FPC穿过两个所述保护块之间的间隙延伸至与所述换能器的两侧连接。
  5. 如权利要求1所述的超声探头，其特征在于，所述保护部件与所述换能器为一体式结构。
  6. 如权利要求1所述的超声探头，其特征在于，还包括固定块，所述FPC通过所述固定块固定在所述安装座上。
  7. 如权利要求6所述的超声探头，其特征在于，所述固定块具有固定孔，所述FPC穿设固定在所述固定块的固定孔内。
  8. 如权利要求7所述的超声探头，其特征在于，所述固定块的固定孔内填充有两层固态胶，其中，面向所述换能器的一层为固态软胶，背向所述换能器的另一层为固态硬胶。
  9. 如权利要求1所述的超声探头，其特征在于，所述FPC包含多个电路层，并且在所述FPC的至少一部分区域内所述FPC的所述多个电路层中的至少一部分电路层相互分离。
  10. 如权利要求1所述的超声探头，其特征在于，所述FPC包含多个电路层，并且至少在所述FPC的至少一部分弯曲区域内所述FPC的所述多个电路层中的至少一部分电路层相互分离。
  11. 如权利要求1或6所述的超声探头，其特征在于，所述FPC位于所述换能器和安装座之间的区域为摆动区域，所述摆动区域内的FPC弯曲设置。
  12. 如权利要求11所述的超声探头，其特征在于，所述FPC包括多个电路层，并且至少在所述摆动区域内，所述FPC的所述多个电路层中的至少一部分电路层相互分离。
  13. 如权利要求11所述的超声探头，其特征在于，所述FPC包括多个电路层，并且至少在所述FPC的位于摆动区域内的弯曲部分，所述FPC的所述多个电路层中的至少一部分电路层相互分离。
  14. 如权利要求9-10和12-13中任一项所述的超声探头，其特征在于，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度彼此不同。
  15. 如权利要求14所述的超声探头，其特征在于，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度依次递增或递减。
  16. 如权利要求1所述的超声探头，其特征在于，所述FPC包含多个电路层，并且在所述FPC的至少一部分区域内所述FPC的电路层的数量小于其余区域内的电路层的数量。
  17. 如权利要求11所述的超声探头，其特征在于，所述摆动区域内的FPC至少在弯曲处的厚度薄于其他区域的厚度。
  18. 如权利要求1或6所述的超声探头，其特征在于，所述保护块位于所述换能器和转轴之间，所述FPC弯折设置，所述FPC的弯折处位于所述转轴的旋转中心线的延长线上，或者所述FPC的弯折处靠近所述转轴的旋转中心线的延长线。
  19. 如权利要求18所述的超声探头，其特征在于，所述FPC穿过所述转轴的旋转中心线的延长线延伸至所述保护块之间的部分垂直所述换能器的端面。
  20. 如权利要求11-13和17中任一项所述的超声探头，其特征在于，所述转轴的中心线的延长线穿过所述换能器，所述FPC位于所述换能器和安装座之间的长度大于所述换能器摆动到极限位置且FPC处于绷紧状态下FPC在所述摆动区域内的长度。
  21. 如权利要求1所述的超声探头，其特征在于，还设有至少一个圆柱挡杆，所述FPC围绕所述圆柱挡杆走线。
  22. 一种超声探头，其特征在于，包括换能器、转轴、FPC和安装座，所述转轴可旋转的安装在所述安装座上，所述换能器固定安装在所述转轴上，所述FPC穿过所述安装座与所述换能器连接；所述FPC包含多个电路层，并且在所述FPC的至少一部分区域内所述FPC的所述多个 电路层中的至少一部分电路层相互分离。
  23. 如权利要求22所述的超声探头，其特征在于，所述FPC包含多个电路层，并且至少在所述FPC的至少一部分弯曲区域内所述FPC的所述多个电路层中的至少一部分电路层相互分离。
  24. 如权利要求22所述的超声探头，其特征在于，所述FPC位于所述换能器和安装座之间的区域为摆动区域，所述摆动区域内的FPC弯曲设置，并且至少在所述FPC的位于摆动区域内的弯曲部分，所述FPC的所述多个电路层中的至少一部分电路层相互分离。
  25. 如权利要求22至24中任一项所述的超声探头，其特征在于，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度彼此不同。
  26. 如权利要求25所述的超声探头，其特征在于，相互分离的电路层中的至少一部分电路层的曲率半径和/或长度依次递增或递减。
  27. 如权利要求22所述的超声探头，其特征在于，在所述FPC的至少一部分区域内所述FPC的电路层的数量小于其余区域内的电路层的数量。
  28. 如权利要求24所述的超声探头，其特征在于，所述摆动区域内的FPC至少在弯曲部分的厚度薄于其他区域的厚度。
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