Flexible circuit board and ultrasonic probe

Abstract

The invention provides a flexible circuit board and an ultrasonic probe. The ultrasonic probe comprises a main shaft, a transducer, an adapter plate and the flexible circuit board, the transducer is mounted at the output end of the main shaft; the flexible circuit board includes: a winding portion configured to be wound around a main shaft of the ultrasonic probe; the transduction connecting part comprises at least two connecting units which can be folded in the first direction, one end of each connecting unit is connected with the first end of the winding part, and the other end of each connecting unit is used for being electrically connected with a transducer; and one end of the switching connection part is connected with the second end of the winding part, and the other end of the switching connection part is used for being electrically connected with a switching plate. The connecting units are folded, so that the width size of the transduction connecting part is reduced, and the transduction connecting part can be conveniently assembled between the main shaft and the transducer.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and more specifically, to a flexible circuit board and an ultrasonic probe. Background Art

[0002] Ultrasonic probes are mainly used for ultrasonic detection in cavities. During the inspection process, the ultrasonic probe generally uses a built-in motor to drive the linear array transducer to rotate 360 ​​degrees to collect three-dimensional images. The linear array transducer includes multiple array elements distributed along the axial direction. Multiple array elements require a large amount of signal transmission, resulting in a large width of the flexible circuit board. The wide flexible circuit board is difficult to pass through the main axis of the ultrasonic probe to electrically connect with the transducer. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a flexible circuit board and an ultrasound probe to solve the technical problem in the prior art that the flexible circuit board is too wide and thus difficult to assemble.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: providing a flexible circuit board for realizing the electrical connection between the transducer and the adapter board in the ultrasound probe, the flexible circuit board comprising:

[0005] A winding portion, configured to be wound around the main shaft of the ultrasonic probe;

[0006] A transducer connection portion, comprising at least two connection units that can be folded along a first direction, one end of each of the connection units being respectively connected to the first end of the winding portion, and the other end of each of the connection units being respectively electrically connected to the transducer;

[0007] An adapter connecting portion, one end of which is connected to the second end of the winding portion, and the other end of which is used to be electrically connected to the adapter board.

[0008] In some embodiments, the connection units include connection ends, and when each of the connection units is folded, each of the connection ends is staggered to be electrically connected to the transducer respectively.

[0009] In some embodiments, the winding portion includes a winding unit, and each of the connecting units is respectively connected to the winding unit;

[0010] Alternatively, the winding portion includes at least two winding units, the number of the winding units is the same as the number of the connecting units, and each connecting unit is connected to each winding unit in a one-to-one correspondence;

[0011] Alternatively, the winding portion includes at least two winding units, the number of the winding units is less than the number of the connecting units, and each of the winding units is connected to at least one of the connecting units.

[0012] In some embodiments, the length extension direction of the winding portion and the length extension direction of the energy conversion connecting portion are perpendicular to each other at least at a connection position between the two;

[0013] And / or, the length extension direction of the winding portion and the length extension direction of the transition connection portion are perpendicular to each other at least at a connection position between the two;

[0014] Alternatively, the winding portion includes at least two winding units, the number of the winding units is greater than the number of the connecting units, and each of the connecting units is connected to at least one of the winding units.

[0015] In some embodiments, the transfer connection portion includes:

[0016] A fixed section, the fixed section is connected to the winding portion, and the fixed section is relatively fixed to the adapter plate;

[0017] A plug-in section, used for electrically connecting to the adapter board;

[0018] Wherein, the plug-in section extends parallel to or bends from the fixing section.

[0019] On the other hand, the present application also provides an ultrasonic probe, comprising a main shaft, a transducer, an adapter board and the above-mentioned flexible circuit board; the transducer is installed at the output end of the main shaft; the flexible circuit board comprises a winding portion, a adapter connection portion and a plurality of connection units, the winding portion is wound around the main shaft, and each of the folded connection units is electrically connected to the transducer respectively, and the adapter connection portion is electrically connected to the adapter board.

[0020] In some embodiments, the main shaft has a slot, which passes through at least one circumferential side of the main shaft and the output end of the main shaft; each of the folded connecting units is inserted into the slot and extends from the output end of the main shaft to be electrically connected to the transducer.

[0021] In some embodiments, the ultrasound probe further includes a connecting piece, the transducer is sealedly connected to the main shaft via the connecting piece, and each of the connecting units is connected to the transducer via the interior of the connecting piece.

[0022] In some embodiments, the ultrasonic probe also includes a protective member fixed relative to the adapter plate, the protective member is rotatably sleeved outside the main shaft, the winding portion is wound between the main shaft and the protective member, and the peripheral side wall of the protective member has a window for the adapter connecting portion to pass through.

[0023] In some embodiments, the ultrasonic probe further includes a limiting assembly, and the limiting assembly is used to limit the rotational travel of the main shaft.

[0024] In some embodiments, the limiting assembly includes:

[0025] The blocking structure comprises a first blocking portion and a second blocking portion which are spaced apart in the circumferential direction;

[0026] A first limiting member, fixedly connected to the main shaft, the first limiting member comprising an arc-shaped portion surrounding the main shaft, the arc-shaped portion having a first limiting surface and a second limiting surface arranged opposite to each other in the circumferential direction;

[0027] The second limiting member is rotatably sleeved on the main shaft, and the second limiting member includes a first limiting portion and a second limiting portion, the first limiting portion is movably arranged between the first limiting surface and the second limiting surface; the second limiting portion is movably arranged between the first blocking portion and the second blocking portion.

[0028] The flexible circuit board and ultrasonic probe provided by the present application have the beneficial effects of: by dividing the transducer connecting part into at least two connecting units, and at least two connecting units can be folded along the first direction, one end of each connecting unit is respectively connected to the first end of the winding part, and the other end of each connecting unit is respectively used for electrical connection with the transducer, which can not only realize the electrical connection between the adapter plate and the transducer, but also, during assembly, each connecting unit can be folded along the first direction, so that the total width of each connecting unit along the first direction is equal to the width of one connecting unit, which greatly reduces the width dimension of the transducer connecting part along the first direction, so that the transducer connecting part occupies a small space during assembly, and can easily form electrical connection with the transducer respectively through the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the structure of each connecting unit in the flexible circuit board provided in an embodiment of the present application when flattened;

[0031] Figure 2 A schematic diagram of the structure of each connecting unit in the flexible circuit board provided in an embodiment of the present application after folding;

[0032] Figure 3 A schematic diagram of a structure in which the winding portion of the flexible circuit board provided in an embodiment of the present application is a slice-type structure;

[0033] Figure 4 A schematic diagram of a structure in which the winding portion of the flexible circuit board provided in an embodiment of the present application is an integrated structure;

[0034] Figure 5 A schematic diagram of the structure of the bending connection of the transfer connection part in the flexible circuit board provided in the embodiment of the present application;

[0035] Figure 6 A schematic diagram of the exploded structure of an ultrasound probe provided in an embodiment of the present application;

[0036] Figure 7 A schematic cross-sectional view of the ultrasonic probe provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of the assembly structure of a flexible circuit board and a transducer in an ultrasound probe provided in an embodiment of the present application;

[0038] Fig. 9 A schematic diagram of the assembly structure of a flexible circuit board, a main shaft and a transducer in an ultrasonic probe provided in an embodiment of the present application;

[0039] Fig.10 A schematic diagram of the exploded structure of the main shaft, protective component, connecting component, flexible circuit board and transducer in the ultrasonic probe provided in an embodiment of the present application;

[0040] Fig.11 for Fig.10 A schematic diagram of the enlarged structure of the part in the middle;

[0041] Fig.12 A schematic diagram of the assembly of a main shaft, a protective member, a connecting member, a flexible circuit board and a transducer in an ultrasonic probe provided in an embodiment of the present application;

[0042] Fig.13 It is a schematic diagram of the winding change of the winding portion between the main shaft and the protective member during the main shaft rotation process in the first winding situation;

[0043] Fig.14 is a schematic diagram of a second extreme position of the winding portion between the main shaft and the protective member in the first winding condition;

[0044] Fig.15 is a schematic diagram of the winding change of the winding portion between the main shaft and the protective member during the main shaft rotation process in the second winding situation;

[0045] Fig.16 A schematic diagram of a structure in which a notch is formed on the outer peripheral wall of the main shaft;

[0046] Fig.17 This is a schematic diagram of the structure after the window of the protective member is enlarged;

[0047] Fig.18 A schematic diagram of the exploded structure of a limit assembly in an ultrasonic probe provided in an embodiment of the present application;

[0048] Fig.19 A schematic diagram of the structure of a first limiter, a second limiter and a retaining ring in an ultrasonic probe provided in an embodiment of the present application;

[0049] Fig. 20 A schematic diagram of the limit position of the main shaft of the ultrasonic probe provided in an embodiment of the present application rotating to a first state;

[0050] Fig.21 A schematic diagram of the limit position of the main shaft of the ultrasonic probe provided in an embodiment of the present application rotating to the second state;

[0051] Fig. 22 A schematic diagram of limiting the rotation of the main shaft of an ultrasonic probe to a first state provided in another embodiment of the present application;

[0052] Fig.23 A schematic diagram of the limit position of the main shaft in the ultrasound probe provided in another embodiment of the present application when it rotates to the second state.

[0053] Among them, the reference numerals in the figure are:

[0054] 100, flexible circuit board; 110, winding part; 111, first end; 112, second end; 113, winding unit; 120, transducer connection part; 121, connection unit; 1211, connection end; 1212, fixed end; 1213, alignment hole; 1214, connection section; 1215, folding section; 1216, protrusion; 130, adapter connection part; 131, fixed section; 1311, third end; 1312, fourth end; 132, plug-in section; 200, spindle; 210, slot; 300, transducer; 400, adapter plate; 500, connector; 600, front shell; 70 0, protective member; 710, window; 800, back shell; 900, limit assembly; 910, blocking structure; 911, first blocking part; 912, second blocking part; 920, first limit member; 921, sleeve part; 922, arc part; 9221, first limit surface; 9222, second limit surface; 930, second limit member; 931, first limit part; 932, second limit part; 933, rotating part; 940, fixed bracket; 950, mounting plate; 960, retaining ring; 970, photoelectric sensor; 1000, motor; 1100, bearing; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0055] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0056] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0057] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] As described in the background technology, an ultrasound probe generally uses a built-in motor to drive a linear array transducer to rotate 360 ​​degrees to collect three-dimensional images. The linear array transducer includes multiple array elements distributed along the axial direction. Multiple array elements require a large amount of signal transmission, resulting in a large width of the flexible circuit board. The wide flexible circuit board is difficult to pass through the main axis of the ultrasound probe to be electrically connected to the transducer.

[0060] For example, in the related art, in order to realize that the flexible circuit board passes through the main shaft to be electrically connected to the transducer, the main shaft is made into a hollow structure, one end of the flexible circuit board is passed through the center of the main shaft to connect to the transducer, and the other end of the flexible circuit board is passed through the center of the main shaft, forming a winding roll at the end of the main shaft and connected to the adapter plate. Among them, because the main shaft is hollow, the main shaft cannot be directly connected to the motor, and a first-level gear transmission needs to be designed, which may cause a reverse transmission gap; in addition, the main shaft is hollow and occupies a large space, which affects other structural designs of the ultrasound probe.

[0061] Please also read Figures 1 to 3 , Figure 6 and Figure 7 Now, the flexible circuit board 100 provided in the embodiment of the present application is described in detail. The flexible circuit board 100 is used to realize the electrical connection between the transducer 300 and the adapter board 400 in the ultrasound probe.

[0062] The flexible circuit board 100 includes a winding portion 110, a transducer connection portion 120 and an adapter connection portion 130; the winding portion 110 is configured to be wound around the main shaft 200 of the ultrasound probe; the transducer connection portion 120 includes at least two connection units 121 that can be folded along a first direction X, one end of each connection unit 121 is respectively connected to the first end 111 of the winding portion 110, and the other end of each connection unit 121 is used to be electrically connected to the transducer 300 respectively; one end of the adapter connection portion 130 is connected to the second end 112 of the winding portion 110, and the other end of the adapter connection portion 130 is used to be electrically connected to the adapter board 400.

[0063] Among them, see Figure 1 and Figure 3 , the number of the connection units 121 can be two, three, four or more.

[0064] In addition, it should be noted that at least two connection units 121 can be folded along the first direction X, and the first direction X can be the length extension direction of the winding portion 110 extending from the first end 111 to the second end 112, and each connection unit 121 is distributed along the length extension direction of the winding portion 110 and is sequentially connected to the winding portion 110. When folding, starting from the connection unit 121 farthest from the second end 112, each connection unit 121 is folded to the connection unit 121 closest to the second end 112, Figure 2 This is a schematic diagram of each connection unit 121 after folding, so that the width dimension of each connection unit 121 along the first direction X is reduced to the width dimension of one connection unit 121, that is, the width dimension of the transducer connection part 120 along the first direction X is reduced to at least half of the original width dimension, and the main shaft 200 does not need to be set as a hollow structure, and only a narrow gap needs to be opened on the main shaft 200 to realize the assembly of each connection unit 121, and the diameter of the main shaft 200 can be designed to be smaller. Of course, in other embodiments, the length extension direction of the winding part 110 can also form an angle with the first direction X, which is not limited here.

[0065] The flexible circuit board 100 provided in the embodiment of the present application divides the transducer connection part 120 into at least two connection units 121, and at least two connection units 121 can be folded along the first direction X, one end of each connection unit 121 is respectively connected to the first end 111 of the winding part 110, and the other end of each connection unit 121 is used to be respectively electrically connected to the transducer, which can not only realize the electrical connection between the adapter plate 400 and the transducer, but also, during assembly, each connection unit 121 can be folded along the first direction X, so that the total width of each connection unit 121 along the first direction X is equal to the width of one connection unit 121, which greatly reduces the width dimension of the transducer connection part 120 along the first direction X, so that the transducer connection part 120 occupies a small space during assembly, and can easily pass through the main shaft 200 to form electrical connections with the transducers 300 respectively. In addition, the provision of the winding portion 110 can prevent the flexible circuit board 100 from being pulled when the main shaft 200 and the transducer 300 rotate, thereby reducing the risk of the flexible circuit board 100 being torn off.

[0066] In some embodiments, see Figure 2 and Figure 8 The connection unit 121 includes a connection segment 1214. When each connection unit 121 is folded, each connection segment 1214 of each connection unit 121 is staggered to be electrically connected to the transducer 300. The staggered setting of the connection segment 1214 enables each connection unit 121 to be connected to the transducer 300.

[0067] Preferably, see Figure 2 and Figure 8 , each connection segment 1214 is sequentially staggered along the second direction Y, the second direction Y is perpendicular to the first direction X, and the second direction Y is parallel to the axial direction of the transducer 300 and the axial direction of the main shaft 200, so that each connection segment 1214 in each connection unit 121 can sequentially form an electrical connection with different positions along the axial direction of the transducer 300. The transducer 300 includes a plurality of array elements sequentially distributed along the axial direction, and each connection segment 1214 forms an electrical connection with one or more array elements.

[0068] In some embodiments, see Figure 1 , Figure 2 and Figure 8 The connecting section 1214 is provided with an alignment hole 1213 and a gold finger. During assembly, the alignment hole 1213 of each connecting section 1214 can be positioned at different axial positions of the transducer 300, and then the gold finger of each connecting section 1214 can be welded to the FPC on each array element, thereby realizing the electrical connection between each connecting unit 121 and the transducer 300.

[0069] Optionally, the number of alignment holes 1213 on each connecting segment 1214 may be one, two, or more than two.

[0070] In some embodiments, see Figure 2 The connection unit 121 further includes a folding section 1215, one end of which is connected to the winding section 110, and the other end of which is connected to the connection section 1214. The connection section 1214 includes an outer protrusion 1216 extending outwardly along the first direction X relative to the folding section 1215, and the alignment hole 1213 is formed in the outer protrusion 1216. The arrangement of the outer protrusion 1216 facilitates the positioning of the alignment hole 1213 and the array element, and after the gold finger on the connection section 1214 is welded to the FPC of the array element, the outer protrusion 1216 will be cut off.

[0071] In the present application, according to actual design requirements and assembly requirements, the winding portion 110 may include one winding unit 113 , or the winding portion 110 may include at least two winding units 113 .

[0072] As an example, see Figure 4 The winding portion 110 includes a winding unit 113. Specifically, the winding unit 113 extends from the first end 111 to the second end 112 along the first direction X, and each connecting unit 121 is connected to the first end 111 of the winding unit 113, respectively.

[0073] As an example, see Figures 1 to 3 The winding portion 110 includes at least two winding units 113, the number of the winding units 113 is the same as the number of the connecting units 121, and each connecting unit 121 is connected to each winding unit 113 in a one-to-one correspondence. Specifically, each winding unit 113 is sequentially distributed along the second direction Y, and the winding unit 113 extends from the first end 111 to the second end 112 along the first direction X; each connecting unit 121 is sequentially distributed along the first direction X, and each connecting unit 121 extends from the fixed end 1212 to the connecting end 1211 along the second direction Y, and each winding unit 113 is vertically connected to each connecting unit 121 in a one-to-one correspondence. In addition, the lengths of the winding units 113 along the first direction X are different, and the lengths of the connecting units 121 along the second direction Y are different, so that the winding units 113 arranged side by side along the second direction Y can be vertically connected one by one with the connecting units 121 arranged side by side along the first direction X, and the connecting segments 1214 of the folded connecting units 121 can be staggered along the second direction Y to be connected to different axial positions of the transducer 300 respectively.

[0074] As one example, the winding portion 110 includes at least two winding units 113, the number of the winding units 113 is less than the number of the connecting units 121, and each winding unit 113 is connected to at least one connecting unit 121. For example, if the number of the winding units 113 is two and the number of the connecting units 121 is four, then every two connecting units 121 can be connected to one of the winding units 113; or, if the number of the winding units 113 is two and the number of the connecting units 121 is three, then one of the winding units 113 can be connected to two of the connecting units 121, and the other winding unit 113 can be connected to the remaining connecting unit 121.

[0075] As one example, the winding portion 110 includes at least two winding units 113, the number of the winding units 113 is greater than the number of the connecting units 121, and each connecting unit 121 is connected to at least one winding unit 113. For example, if the number of the connecting units 121 is two and the number of the winding units 113 is four, then every two winding units 113 can be connected to one of the connecting units 121.

[0076] In some embodiments, see Figures 1 to 4 The length extension direction of the winding portion 110 and the length extension direction of the transducer connection portion 120 are perpendicular to each other at least at the connection position between the two; the length extension direction of the winding portion 110 and the length extension direction of the adapter connection portion 130 are perpendicular to each other at least at the connection position between the two.

[0077] As defined above, the length extension direction of the winding portion 110 is the extension direction from the first end 111 to the second end 112 of the winding portion 110. The length extension direction of the transducer connection portion 120 is the extension direction from the fixed end 1212 to the connection end 1211 of the transducer connection portion 120, that is, the second direction Y. The length extension direction of the adapter connection portion 130 is the direction extending from the end thereof connected to the adapter plate 400 to the winding portion 110. During assembly, the second direction Y is generally set parallel to the axial direction of the main shaft 200.

[0078] In this embodiment, the length extension direction of the winding portion 110 and the length extension direction of the transducer connection portion 120 are perpendicular to each other at least at the connection position between the two, and the length extension direction of the winding portion 110 and the length extension direction of the adapter connection portion 130 are perpendicular to each other at least at the connection position between the two, so that after the winding portion 110 is wound on the main shaft 200, the transducer connection portion 120 can also extend along the axial direction of the main shaft 200 to be electrically connected to different positions of the transducer 300 along the axial direction, and the adapter connection portion 130 can also extend along the axial direction of the main shaft 200 to be attached to the outer wall of the protective member 700, and extend out of the rear shell 800 to be electrically connected to the adapter plate 400. Among them, the protective member 700 is a cylindrical structure sleeved outside the main shaft 200 to protect the flexible circuit board 100, and the rear shell 800 is sleeved outside the protective member 700.

[0079] In some embodiments, see Figure 1 and Figure 5 The adapter connection portion 130 includes a fixed section 131 and a plug section 132; the fixed section 131 is connected to the second end 112 of the winding portion 110, and the fixed section 131 is relatively fixed to the adapter plate 400, specifically, the fixed section 131 is fixed to the protective member 700 of the ultrasonic probe; the plug section 132 is used to be electrically connected to the adapter plate 400, specifically, it is plugged into the electrical connector on the adapter plate 400. The plug section 132 extends parallel to or bends from the fixed section 131.

[0080] It should be noted that the plug-in section 132 extends parallel to the fixed section 131, which means that the plug-in section 132 continues to extend along the length extension direction of the fixed section 131. The length extension direction of the fixed section 131 is the direction in which the fixed section 131 extends from the third end 1311 connected to the winding portion 110 along the fourth end 1312 away from the winding portion 110, that is, the entire adapter connection portion 130 extends in a straight line in the same direction.

[0081] In addition, it should be noted that the plug section 132 bends and extends from the fixed section 131, which means that the plug section 132 continues to extend in a direction deviating from the length extension direction of the fixed section 131. Specifically, the plug section 132 can extend perpendicularly to the fixed section 131, or extend at an acute or obtuse angle to the fixed section 131.

[0082] In this embodiment, the plug-in section 132 is extended parallel to or bent from the fixed section 131 so that the plug-in section 132 can be plugged in according to the actual orientation of the adapter plate 400, thereby ensuring that the plug-in section 132 can be inserted into the adapter plate in parallel and avoiding bending or damage of the plug-in section 132 due to plugging.

[0083] Optionally, the fixing section 131 is vertically connected to the winding portion 110 , and the fixing section 131 extends in the opposite direction of the second direction Y. The plug-in section 132 may extend in the opposite direction of the second direction Y or in the first direction X.

[0084] In a specific embodiment, the entire flexible circuit board 100 is roughly Z-shaped, the winding portion 110 extends along a straight line, the transducer connection portion 120 extends along a straight line, the winding portion 110 extends along a straight line, and the length extension direction of the winding portion 110 is perpendicular to the length extension direction of the transducer connection portion 120; the length extension direction of the winding portion 110 is perpendicular to the length extension direction of the adapter connection portion 130.

[0085] On the other hand, see Figure 6 and Figure 7 The embodiment of the present application also provides an ultrasonic probe, comprising a main shaft 200, a transducer 300, an adapter plate 400 and the above-mentioned flexible circuit board 100; the transducer 300 is installed at the output end of the main shaft 200; the flexible circuit board 100 comprises a winding portion 110, an adapter connection portion 130 and a plurality of connection units 121, the winding portion 110 is wound on the main shaft 200, the folded connection units 121 are respectively connected to the transducer 300, and the adapter connection portion 130 is connected to the adapter plate 400. In this embodiment, through the arrangement of the above-mentioned flexible circuit board 100, the folded connection units 121 occupy a small space, which facilitates the connection of the connection units 121 with the transducer 300 via the main shaft 200, and the outer diameter of the main shaft 200 can be smaller.

[0086] Specifically, the transducer 300 includes a mounting seat, a backing layer, a piezoelectric layer, an FPC, a matching layer and a sound-transmitting layer, wherein the mounting seat is used to fix and support the entire transducer 300, and the transducer 300 is connected to the output end of the main shaft 200 through the mounting seat. The backing layer is used to absorb the sound waves generated by the piezoelectric ultrasonic transducer to avoid image artifacts; the piezoelectric layer is used for transmitting and receiving ultrasonic waves; the FPC is used to connect the electrodes of each array element of the piezoelectric layer; the matching layer is used to solve the problem of interface acoustic impedance mismatch between human tissue and the piezoelectric layer, and improve the ultrasonic transmission efficiency; the sound-transmitting layer is used to gather the sound beam of the catheter transducer in the elevation direction to enhance the sensitivity of the transducer 300 and improve the image quality.

[0087] In some embodiments, see Figures 9 to 11, the main shaft 200 has a slot 210, the slot 210 at least passes through one side of the circumference of the main shaft 200, and the slot 210 passes through the output end of the main shaft 200; each folded connection unit 121 is inserted into the slot 210 and extends from the output end of the main shaft 200 to be electrically connected to the transducer 300. In this embodiment, it is only necessary to set the slot 210 on the main shaft 200, and the thickness of the slot 210 only needs to match the total thickness of the multiple folded connection units 121. The thickness of the flexible circuit board 100 is thin, so the thickness of the slot 210 can also be smaller, so that the diameter of the main shaft 200 can be designed to be smaller, and the main shaft 200 can be connected to the motor through a coupling, and there is no need to use a primary gear structure to connect the input end of the main shaft 200 with the motor 1000.

[0088] In some embodiments, the slot 210 may penetrate one circumferential side of the main shaft 200. During assembly, the connection unit 121 may be inserted into the slot 210 from one circumferential side of the main shaft 200 and extend from the output end of the main shaft 200 to be electrically connected to the transducer 300. In addition, the connection unit 121 may be bonded and fixed to the slot 210 by dispensing glue.

[0089] In other embodiments of the present application, the slot 210 may also penetrate two opposite sides of the main shaft 200 in the circumferential direction, and the connecting unit 121 may be inserted into the slot 210 from one of the two opposite sides of the main shaft 200. In addition, the connecting unit 121 may be bonded and fixed in the slot 210 by dispensing glue.

[0090] In some other embodiments of the present application, the slot 210 may penetrate one circumferential side of the main shaft 200, and at least one section of the socket may be opened at the position of the winding portion 110 on the other circumferential side of the main shaft 200. During assembly, the connection unit 121 may be inserted into the slot 210 from one circumferential side of the main shaft 200, and the winding portion 110 may pass through one circumferential side of the slot 210 and / or the position of the socket to be wound on the main shaft 200. In addition, the connection unit 121 may be bonded and fixed to the slot 210 by dispensing glue.

[0091] Optionally, see Fig. 9 , the slot 210 passes through the central axis of the spindle 200, and when the diameter of the spindle 200 is fixed, the width of the slot 210 along the second direction Y can be relatively wide. In other words, when the width of the folded connection unit 121 is constant, the design of passing the slot 210 through the central axis of the spindle 200 can make the diameter of the spindle 200 smaller. It can be understood that in other embodiments of the present application, the above-mentioned slot 210 may not pass through the central axis of the spindle 200, and this is not the only limitation here.

[0092] In some embodiments, see Figures 6 to 11The ultrasonic probe further includes a connector 500, through which the transducer 300 is sealedly connected to the main shaft 200, and each connecting unit 121 is connected to the transducer 300 via the inside of the connector 500. The connector 500 is provided so that each connecting unit 121 can extend from the output end of the main shaft 200 and be inserted into the transducer 300 via the inside of the connector 500 to be connected, thereby being sealed inside the transducer 300.

[0093] For details, please refer to Fig.11 The connecting member 500 is cylindrical, the output end of the main shaft 200 is inserted into one end of the connecting member 500 and is sealed and connected to the connecting member 500, the transducer 300 is inserted into the other end of the connecting member 500 and is sealed and connected to the connecting member 500, and each connecting unit 121 passes through the center hole of the connecting member 500.

[0094] Specifically, the connecting member 500 includes two semicircular structures, which are respectively sleeved on the output end of the main shaft 200 and the input end of the transducer 300 and are locked by screws to form a sealed connection between the main shaft 200 and the transducer 300 .

[0095] In some embodiments, after each connection unit 121 is connected to the transducer 300, the surface of the entire transducer 300 is packaged in a cylindrical shape by glue injection, so that the connection position between the transducer 300 and the connection unit 121 can be sealed. It can be understood that in other embodiments of the present application, the transducer 300 can also be sealed by sleeve-fitting a sealing sleeve on the surface of the transducer 300.

[0096] In some embodiments, the transducer 300 includes a plurality of array elements, and each connection unit 121 corresponds to one array element, or each connection unit 121 corresponds to a plurality of array elements.

[0097] In some embodiments, see Figure 7 The ultrasonic probe further includes a front shell 600 , which is sleeved on the outside of the transducer 300 and enclosed with the connector 500 to form a sealed cavity, into which coupling liquid is poured, and the coupling liquid is isolated from the flexible circuit board 100 .

[0098] In some embodiments, see Figure 6 , Figure 7 and Fig.12The ultrasonic probe further includes a protective member 700 fixed relative to the adapter plate 400. The protective member 700 is roughly cylindrical and is rotatably sleeved outside the main shaft 200. The winding portion 110 is wound between the main shaft 200 and the protective member 700. The peripheral side wall of the protective member 700 has a window 710 for the adapter connecting portion 130 to pass through. The setting of the protective member 700, on the one hand, can restrict the winding portion 110 between the protective member 700 and the main shaft 200, and avoid the situation where the winding portion 110 is excessively loosened due to the rotation of the main shaft 200; at the same time, the adapter connecting portion 130 can be fixed, specifically, the adapter connecting portion 130 is bonded to the outer wall of the protective member 700, to ensure the connection reliability between the adapter connecting portion 130 and the adapter plate 400.

[0099] In some embodiments, see Figure 6 and Figure 7 The protective member 700 is rotatably sleeved on the main shaft 200 through the bearing 1100. Specifically, the protective member 700 is fixed in the handle of the ultrasonic probe and is fixed on the same bracket as the motor 1000.

[0100] Optionally, the protection member 700 has two windows 710 , and the two windows 710 are arranged opposite to each other.

[0101] In the present application, the main shaft 200 and the protective member 700 rotate relative to each other, and the length of the winding portion 110 needs to be reasonably designed to ensure that the winding portion 110 will not be damaged between the main shaft 200 and the protective member 700.

[0102] Specifically, there are two winding methods for the winding portion 110, and the length of the winding portion 110 is calculated for the two winding methods respectively. It should be noted that one flexible circuit board 100 or multiple flexible circuit boards 100 can be provided in the ultrasonic probe. When two flexible circuit boards 100 are provided in the ultrasonic probe, the winding portions 110 of the two flexible circuit boards 100 can be staggered in the radial direction of the main shaft 200, or the two winding portions 110 can be staggered in the axial direction of the main shaft 200; when multiple flexible circuit boards 100 are provided in the ultrasonic probe, the winding portions 110 of each flexible circuit board 100 can be staggered in the radial direction of the main shaft 200 and / or staggered in the axial direction of the main shaft 200.

[0103] Since the winding method and length calculation of the winding portion 110 are the same in the above cases, the following description is based on the case where two flexible circuit boards 100 are provided in the ultrasonic probe. Specifically, the two transducer connecting portions 120 are respectively inserted into the slots 210 of the main shaft 200, and the two winding portions 110 are respectively wound around the main shaft 200 and respectively drawn out from two oppositely disposed windows 710 of the protective member 700 to be attached to the outer wall of the protective member 700.

[0104] In the first case, see Fig.13 , the bending direction of the winding portion 110 changes during rotation, specifically, when the main shaft 200 rotates from 0° to 360°, the winding direction of the winding portion 110 changes, for example, from clockwise winding to counterclockwise winding. At this time, the winding portion 110 is relatively short, but the bending angle of the winding portion 110 is large each time it rotates. If the winding portion 110 is designed and calculated according to the intermediate length, it can be ensured that the winding portion 110 is always in a relaxed state and the bending angle is as small as possible.

[0105] Specifically, in the initial state, the two winding portions 110 are respectively led out from opposite sides of the slot 210 of the main shaft 200, and after being wound half a circle in a loose state, they are attached to the outer wall of the protective member 700, and the length of the winding portion 110 is L. Fig.13 , the main shaft 200 rotates 180° and 360° clockwise from the initial position, and then rotates 180° and 360° counterclockwise to return to the initial position. The length L of the winding portion 110 has two extreme conditions:

[0106] Limit case 1: Please refer to Fig.13 At the initial position, the winding portion 110 moves from point A along the outer wall of the main shaft 200 to point B, and then moves in a straight line to point C, at which time the length is L1;

[0107] in, r is the outer diameter of the main shaft 200, and R1 is the inner diameter of the protective member 700. It should be noted that the arc length of the AB segment is not necessarily close to the main shaft 200, so when calculating L1, the value of L1 can be enlarged to a certain extent, for example, by 10%-30%.

[0108] Limiting case 2: See Fig.14 , the winding portion 110 reaches point D from point A, and reaches point C along the inner wall of the protective member 700, at which time the length is L2;

[0109] Where L AD =R2-r;

[0110] As shown in the figure, L1≤L≤L2, and it is more reasonable for the length of L to be closer to L1.

[0111] In the second case, the bending direction of the winding portion 110 does not change during the rotation, specifically, the winding direction of the winding portion 110 does not change during the rotation of the main shaft 200, for example, it is always wound clockwise or always wound counterclockwise. In this case, the bending angle of the winding portion 110 is very small, but the number of windings of the winding portion 110 is large, and the winding portion 110 is designed and calculated according to the minimum length.

[0112] See also Fig.15, where Fig.15 in a, it is the initial assembly state, where the relative openings of the slots 210 of the main shaft 200 are aligned with the two windows 710 of the protection member 700; Fig.15 in b, it is the state after the protection member 700 is fixed and the main shaft 200 rotates clockwise by γ degrees, where γ is an angle greater than 360°. At this time, the winding portion 110 is completely wound and tightly attached to the main shaft 200, and the winding portion 110 is in the first extreme position; Fig.15 in c, the protection member 700 is fixed, and the main shaft 200 is relative to Fig.15 the state after rotating counterclockwise by 180° relative to b in the figure; Fig.15 in d, the protection member 700 is fixed, and the main shaft 200 is relative to Fig.15 the state after rotating counterclockwise by 360° relative to b in the figure. At this time, the winding portion 110 is completely opened and attached to the inner wall of the protection member 700, and the winding portion 110 is in the second extreme position. Wherein, in the figure, M and N are the opening positions on both sides of the main shaft 200, and the initial winding position of the winding portion 110 is always point N; point C is the initial position of the winding portion 110 when the protection member 700 is fixed; O is the center of the circle; D is the intersection point of the perpendicular line ND of MN at the maximum winding radius.

[0113] As Fig.15 in b, when the winding portion 110 is in the first extreme position, at this time the main shaft 200 rotates γ, and the minimum length of the winding portion 110 is L1, where r is the outer diameter of the main shaft 200; R1 is the inner diameter of the protection member 700; γ is the maximum angle of rotation of the main shaft 200 during operation; α is the angle of one-sided window 710 of the protection member 700, that is, the angle ∠COS between the connection line OC and the opening center line of the main shaft 200. To ensure that the arc length of the protection member 700 is sufficient to support the winding portion 110, therefore: 0° ≤ α ≤ 45°;

[0114] As Fig.15 in d, when the winding portion 110 is in the second extreme position, at this time the main shaft 200 rotates γ - 360°, and the maximum length of the winding portion 110 is L2, where P is the winding radius, restricted by the size of the protection member 700, r < P ≤ R2, and R2 is the outer diameter of the protection member 700; S ND is the arc length of ND. Among them, S ND when satisfying the following relationship,

[0115] it is necessary to solve the minimum value of L. Through the following relationship, L = L1, L ≤ L2, and thus it can be deduced that:

[0116]

[0117] and

[0118] In the above formula, in order to simplify the calculation, S ND According to L BC To take the value, therefore, the above formula is derived:

[0119]

[0120] It can be seen that the larger P is, the smaller γ+α is; the smaller γ+α is, the smaller L is;

[0121] Therefore, when P = R2, we can calculate (γ + α) min , and thus calculate L min .

[0122] Generally, both the limit position 1 and the limit position 2 reserve a θ margin, so

[0123]

[0124] Among them, θ is generally 10°-20°, and L is calculated according to the above method. min .

[0125] In the present application, in order to make the length of the winding portion 110 smaller when it is wound, based on the above calculation method, the main shaft 200 and the protective member 700 can also be improved as follows.

[0126] For spindle 200, see Fig.16 The notch 220 is provided on the outer peripheral wall of the main shaft 200. Specifically, the notch 220 can be formed by removing material from the outer peripheral wall of the main shaft 200 along a first direction, wherein the first direction is a direction perpendicular to the slot 210. The notch 220 can reduce the equivalent winding radius r of the winding portion 110. s smaller, thus making L min Smaller.

[0127] For protection element 700, see Fig.17 , the size of the two windows 710 of the protective member 700 is designed to be larger, and the central angle of the window 710 is ensured to be less than 90 degrees, that is, to ensure that α is less than 45 degrees, then the equivalent winding radius R 2s larger, so that L min Smaller.

[0128] In general, the above two methods can both make the winding angle of the winding portion 110 smaller, the winding length of the winding portion 110 smaller, and the winding reliability higher.

[0129] In some embodiments, see Figure 7The ultrasound probe also includes a rear shell 800 and a handle, the adapter plate 400 is fixed in the handle, the rear shell 800 is sleeved on the outside of the protective member 700, the rear shell 800 is connected between the handle and the front shell 600, the adapter connection part 130 passes through between the rear shell 800 and the protective member 700 to connect with the adapter plate 400, the fixing section 131 of the adapter connection part 130 is adhered to the outer wall of the protective member 700, and the adapter connection part 130 is fixed by the protective member 700, thereby ensuring the connection reliability between the adapter connection part 130 and the adapter plate 400.

[0130] Optionally, the ultrasonic probe further includes a motor 1000 , which is installed in the handle and connected to an input end of the main shaft 200 .

[0131] In some embodiments, see Figure 6 , Figure 7 , Figures 18 to 20 , the ultrasonic probe also includes a limit assembly 900, which is used to limit the rotation stroke of the main shaft 200. In the present application, since a three-dimensional image needs to be obtained, the main shaft 200 needs to rotate 360 ​​degrees with the transducer 300. At the same time, since the adapter connection part 130 is connected to the adapter plate 400, and the transducer connection part 120 is connected to the transducer 300, that is, the winding part 110 between the adapter connection part 130 and the transducer connection part 120 will rotate relative to each other during the rotation of the main shaft 200. In order to avoid damage to the flexible circuit board 100 caused by the rotation of the main shaft 200, it is necessary to limit the rotation stroke of the main shaft 200 through the limit assembly 900, thereby reducing damage to the flexible circuit board 100.

[0132] In some embodiments, see Figures 18 to 20 The limiting assembly 900 includes a blocking structure 910, a first limiting member 920 and a second limiting member 930. The blocking structure 910 is fixed relative to the adapter plate 400, and includes a first blocking portion 911 and a second blocking portion 912 spaced apart along the circumferential direction; the first limiting member 920 is fixedly connected to the main shaft 200, and includes an arc portion 922 surrounding the main shaft 200, and the arc portion 922 has a first limiting surface 9221 and a second limiting surface 9222 arranged oppositely along the circumferential direction; the second limiting member 930 is rotatably sleeved on the main shaft 200, and includes a first limiting portion 931 and a second limiting portion 932, and the first limiting portion 931 is movably arranged between the first limiting surface 9221 and the second limiting surface 9222; the second limiting portion 932 is movably arranged between the first limiting portion 911 and the second limiting portion 912.

[0133] The blocking structure 910 is fixed relative to the adapter plate 400, that is, the blocking structure 910 is fixedly arranged during the rotation of the main shaft 200. The first stopper 920 is fixedly connected to the main shaft 200, and the first stopper 920 rotates with the main shaft 200, and the arc portion 922 also rotates with the main shaft 200. The second stopper 930 is rotatably sleeved on the main shaft 200, so that the second stopper 930 and the main shaft 200 can rotate relative to each other. Specifically, as Fig. 20 As shown in the figure, the first limiting member 920 and the second limiting member 930 are in the first state, at this time, the second limiting portion 932 is limited to the first blocking portion 911 of the blocking structure 910, and the first limiting portion 931 is in contact with the first limiting surface 9221 of the arc portion 922, so that the first limiting member 920 and the second limiting member 930 cannot rotate clockwise; at this time, the first limiting member 920 can be driven to rotate counterclockwise, and when the first limiting member 920 rotates counterclockwise by an angle A1, the first limiting portion 931 and the first limiting portion 930 are in contact with each other. The second limiting surface 9222 of the first limiting member 920 is in contact with the second limiting surface 9222 of the first limiting member 920, and the second limiting surface 9222 pushes the second limiting member 930 and the first limiting member 920 to continue to rotate counterclockwise. After rotating counterclockwise by an angle A2, the second limiting portion 932 of the second limiting member 930 is in contact with the second blocking portion 912 of the blocking structure 910, so that the first limiting member 920 and the second limiting member 930 cannot continue to rotate clockwise, that is, the first limiting member 920 and the second limiting member 930 can only rotate clockwise at this time. Among them, the total angle A0 that the main shaft 200 can rotate counterclockwise is A1+A2, as long as A1+A2 is greater than 360 degrees and less than 450 degrees.

[0134] As an example, see Fig.18 and Fig.21 , the angle between the first limiting surface 9221 and the second limiting surface 9222 is 180°, and the angle a2 corresponding to the first limiting portion 931 along the circumferential direction is 80°, then A1=180°-80°=100°; in addition, the central angle a1 corresponding to the first blocking portion 911 and the second blocking portion 912 of the blocking structure 910 along the circumferential direction is 80°, that is, the angle A2 that the second limiting portion 932 can rotate from the first blocking portion 911 of the blocking structure 910 to the second blocking portion 912 is 360°-80°=280°, so A0=100°+280°=380°, which can ensure a complete circular motion scan, and by means of 20 and Fig.21 The two extreme positions of the main shaft 200 are shown in FIG. 1 , and the rotation angle of the main shaft 200 is -10° to 370°, which meets the design requirements.

[0135] Specifically, in this example, the first blocking portion 911 and the second blocking portion 912 are an integrally connected structure, so the blocking structure 910 is a block structure extending in the circumferential direction.

[0136] As another example, see Fig. 22 and Fig.23 , the rotation angle A1 of the first limiting portion 931 between the first limiting surface 9221 and the second limiting surface 9222 is 280°; in addition, the circular angle between the first blocking portion 911 and the second blocking portion 912 is 100°, that is, A2 is 100°, so A0=100°+280°=380°, which can ensure a complete circular motion scan and meet the design requirements.

[0137] Specifically, in this embodiment, the first blocking portion 911 and the second blocking portion 912 are independently provided and spaced apart in the circumferential direction.

[0138] In some embodiments, see Fig.18 The limiting assembly 900 also includes a fixed bracket 940 and two mounting plates 950. The two mounting plates 950 are respectively installed on opposite sides of the fixed bracket 940. The fixed bracket 940 is fixedly connected to the handle. The blocking structure 910 is installed on the fixed bracket 940. The main shaft 200 is set through the fixed bracket 940. The first limiting member 920 is fixedly sleeved on the main shaft 200 and rotates between the two mounting plates 950. The second limiting member 930 is rotatably sleeved on the main shaft 200. A retaining ring 960 is sleeved on the main shaft 200. The second limiting member 930 is axially limited by the retaining ring 960 to prevent the second limiting member 930 from separating from the main shaft 200.

[0139] For details, please refer to Fig.19 The first stopper 920 includes a sleeve portion 921 and an arc portion 922 formed on the outer periphery of the sleeve portion 921, and the sleeve portion 921 is fixedly sleeved on the main shaft 200.

[0140] For details, please refer to Fig.19 The second limiting member 930 includes a rotating portion 933, which is rotatably sleeved on the main shaft 200, and the first limiting portion 931 and the second limiting portion 932 are respectively formed at different positions of the rotating portion 933 along the circumferential direction.

[0141] In some embodiments, see Fig.18 and Fig. 20 The limit assembly 900 also includes a photoelectric sensor 970, which is disposed on the outer periphery of the arc portion 922. The photoelectric sensor 970 is fixed on the mounting plate 950. When the arc portion 922 rotates through the photoelectric sensor 970, 0-point confirmation is completed, wherein the completion of 0-point confirmation means that ultrasonic scanning can be started at this time.

[0142] Optionally, the blocking structure 910 and the photoelectric sensor 970 are mounted on two mounting plates 950 respectively.

[0143] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A flexible circuit board (100) for realizing electrical connection between a transducer (300) and an adapter board (400) in an ultrasonic probe, characterized in that: The flexible circuit board (100) comprises: A winding portion (110) is arranged to be wound around the main shaft (200) of the ultrasonic probe; A transducer connection portion (120), comprising at least two connection units (121) capable of being folded along a first direction, one end of each of the connection units (121) being respectively connected to the first end (111) of the winding portion (110), and the other end of each of the connection units (121) being respectively used for being electrically connected to a transducer (300); An adapter connecting portion (130), one end of the adapter connecting portion (130) being connected to the second end (112) of the winding portion (110), and the other end of the adapter connecting portion (130) being used for being electrically connected to the adapter plate (400).

2. The flexible circuit board (100) according to claim 1, characterized in that: The connection unit (121) comprises a connection segment (1214); when each of the connection units (121) is folded, each of the connection segments (1214) is staggered to be electrically connected to the transducer (300) respectively.

3. The flexible circuit board (100) according to claim 1, characterized in that: The winding portion (110) comprises a winding unit (113), and each of the connecting units (121) is respectively connected to the winding unit (113); Alternatively, the winding portion (110) comprises at least two winding units (113), the number of the winding units (113) is the same as the number of the connecting units (121), and each connecting unit (121) is connected to each winding unit (113) in a one-to-one correspondence; Alternatively, the winding portion (110) comprises at least two winding units (113), the number of the winding units (113) is less than the number of the connecting units (121), and each of the winding units (113) is connected to at least one of the connecting units (121); Alternatively, the winding portion (110) includes at least two winding units (113), the number of the winding units (113) is greater than the number of the connecting units (121), and each of the connecting units (121) is connected to at least one of the winding units (113).

4. The flexible circuit board (100) according to claim 1, characterized in that: The length extension direction of the winding portion (110) and the length extension direction of the energy conversion connecting portion (120) are perpendicular to each other at least at a connection position between the two; And / or, the length extension direction of the winding portion (110) and the length extension direction of the transition connection portion (130) are perpendicular to each other at least at the connection position between the two.

5. The flexible circuit board (100) according to any one of claims 1 to 4, characterized in that: The transfer connection part (130) comprises: a fixing section (131), the fixing section (131) being connected to the winding portion (110), and the fixing section (131) being relatively fixed to the adapter plate (400); A plug-in section (132), used for being electrically connected to the adapter plate (400); Wherein, the plug-in section (132) extends in parallel or in a bent manner from the fixing section (131).

6. An ultrasonic probe, characterized in that The invention comprises a main shaft (200), a transducer (300), an adapter plate (400) and a flexible circuit board (100) as claimed in any one of claims 1 to 5; the transducer (300) is installed at the output end of the main shaft (200); the flexible circuit board (100) comprises a winding portion (110), an adapter connecting portion (130) and a plurality of connecting units (121), the winding portion (110) is wound on the main shaft (200), and each of the connecting units (121) after folding is electrically connected to the transducer (300) respectively, and the adapter connecting portion (130) is electrically connected to the adapter plate (400).

7. The ultrasonic probe according to claim 6, characterized in that: The main shaft (200) has a slot (210), the slot (210) at least passes through one circumferential side of the main shaft (200), and the slot (210) passes through the output end of the main shaft (200); each of the folded connection units (121) is inserted into the slot (210) and extends from the output end of the main shaft (200) to be electrically connected to the transducer (300).

8. The ultrasonic probe according to claim 6, characterized in that: The ultrasonic probe further comprises a connecting piece (500), the transducer (300) and the main shaft (200) are sealedly connected via the connecting piece (500), and each of the connecting units (121) is connected to the transducer (300) via the interior of the connecting piece (500).

9. The ultrasonic probe according to claim 6, characterized in that: The ultrasonic probe further comprises a protective member (700) fixed relative to the adapter plate (400), the protective member (700) being rotatably sleeved outside the main shaft (200), the winding portion (110) being wound between the main shaft (200) and the protective member (700), and the peripheral side wall of the protective member (700) having a window (710) for the adapter connecting portion (130) to pass through.

10. The ultrasonic probe according to claim 6, characterized in that: The ultrasonic probe further comprises a limiting assembly (900), wherein the limiting assembly (900) is used to limit the rotational travel of the main shaft (200).

11. The ultrasonic probe according to claim 10, characterized in that: The limiting assembly (900) comprises: A blocking structure (910) comprising a first blocking portion (911) and a second blocking portion (912) spaced apart in the circumferential direction; A first limiting member (920) is fixedly connected to the main shaft (200), the first limiting member (920) comprising an arc-shaped portion (922) surrounding the main shaft (200), the arc-shaped portion (922) having a first limiting surface (9221) and a second limiting surface (9222) arranged opposite to each other in the circumferential direction; The second limiting member (930) is rotatably sleeved on the main shaft (200), and the second limiting member (930) includes a first limiting portion (931) and a second limiting portion (932), wherein the first limiting portion (931) is movably disposed between the first limiting surface (9221) and the second limiting surface (9222); and the second limiting portion (932) is movably disposed between the first blocking portion (911) and the second blocking portion (912).

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