Three-dimensional imaging ultrasonic probe

Abstract

The utility model discloses a three-dimensional imaging ultrasonic probe which comprises a probe shell, a base, a transducer support, a transducer and a driving assembly, a guide rail is arranged on the base, and a first rolling surface and a second rolling surface are arranged on the guide rail; the two ends of the transducer support are connected to the guide rails in a rolling mode through roller assemblies respectively. The driving assembly comprises a driving piece and a transmission rope, and the transmission rope is used for driving the transducer assembly to move along the pair of guide rails; the roller assembly comprises a roller support, a roller, a rolling part support, a rolling part and a bias part. The bias part is elastically arranged between the roller support and the rolling part support, and bias force of the bias part drives the roller support to rotate relative to the rotating axis. The rolling wheel and the rolling piece can be attached to the first rolling face and the second rolling face of the guide rail all the time under the action of the bias piece, the requirements for the machining precision and the assembling precision of the guide rail can be lowered, the ultrasonic probe can be used in the temperature changing environment easily, and the long-term working reliability of the ultrasonic probe can be guaranteed easily.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic equipment technology, specifically to a three-dimensional imaging ultrasonic probe. Background Technology

[0002] Traditional 3D imaging ultrasound probes mainly consist of a transducer, a transducer support, a rotating shaft, and a drive mechanism. The transducer is mounted on the transducer support, which is fixed to the rotating shaft. The drive mechanism drives the rotating shaft to rotate around its own axis, causing the transducer support and the transducer on it to reciprocate, thereby obtaining a 3D ultrasound image directly in front of the probe. However, the field of view directly in front of this type of ultrasound probe is very narrow. To obtain a wider field of view in front of the probe, some ultrasound probes have a pair of guide rails inside. The transducer slides on these rails, and the drive mechanism uses a pull rope to move the transducer back and forth on the rails. This reciprocating motion of the transducer on the rails helps to improve the scannable wide field of view directly in front of the probe. At the same time, the accuracy of the transducer's motion trajectory affects the accuracy of the final 3D ultrasound image obtained by the 3D imaging ultrasound probe.

[0003] In order to obtain 3D ultrasound images with a large field of view and high accuracy, the above-mentioned three-dimensional imaging ultrasound probe has very high requirements for the processing and assembly accuracy of a pair of guide rails. When the ambient temperature changes cause slight deformation of the pair of guide rails, or when the guide rails deform or wear after long-term use, the transducer will not be able to make precise reciprocating motion in the pre-set direction on the guide rails, thus affecting the accuracy of the 3D ultrasound images obtained by the three-dimensional imaging ultrasound probe. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the shortcomings of the existing three-dimensional imaging ultrasonic probe, which has very high requirements for the processing and assembly accuracy of the internal guide rail and is difficult to process and assemble, so as to provide a three-dimensional imaging ultrasonic probe.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A three-dimensional imaging ultrasound probe, comprising:

[0007] Probe housing;

[0008] A base is disposed inside the probe housing, and a pair of guide rails are provided on the base; the guide rails are provided with a first rolling surface and a second rolling surface that are parallel to each other and not coplanar;

[0009] A transducer assembly includes a transducer bracket and a transducer connected to the transducer bracket; both ends of the transducer bracket are rotatably connected to the guide rail via roller assemblies.

[0010] The drive assembly includes a drive member on the base and a transmission rope driven by the drive member to perform winding and unwinding movements; one end of the transmission rope is connected to the transducer assembly, and the transmission rope drives the transducer assembly to move along the guiding direction of a pair of guide rails when performing winding and unwinding movements.

[0011] The roller assembly includes:

[0012] A roller bracket is connected to the transducer bracket;

[0013] A roller is connected to the roller bracket and is rotatable about its own axis, and the roller is in contact with the first rolling surface;

[0014] A rolling element support is rotatably connected to the roller support about a rotation axis;

[0015] A rolling element is connected to the rolling element bracket and is rotatable about its own axis;

[0016] A biasing element is elastically disposed between the roller bracket and the rolling element bracket; the biasing force of the biasing element drives the roller bracket to rotate relative to the rotation axis so that the rolling element is in contact with the second rolling surface.

[0017] Furthermore, the first rolling surface is the surface of the guide rail facing away from the base; the guide rail has a guide groove, one end of the rolling element extends into the guide groove, and the second rolling surface is a groove sidewall of the guide groove near the first rolling surface.

[0018] Furthermore, both the first rolling surface and the second rolling surface are arc-shaped curved surfaces.

[0019] Furthermore, there are two rollers, both of which are mounted on the roller bracket via roller shafts, and the rollers are rotatably connected to the roller shafts around their own axial direction.

[0020] Furthermore, a pin is fixedly connected to the roller bracket, the axis of the pin is the rotation axis, the pin passes through the rolling element bracket, and the rolling element bracket is rotatably configured around the axis of the pin.

[0021] Furthermore, the biasing component is a torsion spring sleeved on the outer periphery of the pin shaft, the torsion spring being located between the roller bracket and the rolling element bracket; one protruding end of the torsion spring abuts against the roller bracket, and the other protruding end of the torsion spring abuts against the rolling element bracket.

[0022] Furthermore, the roller bracket is provided with a first limiting block extending in the direction of the rolling element bracket, and the rolling element bracket is provided with a second limiting block extending in the direction of the roller bracket; one protruding end of the torsion spring abuts against the first limiting block, and the other protruding end of the torsion spring abuts against the second limiting block.

[0023] Furthermore, the rolling element is mounted on the rolling element bracket via a rolling element shaft. One end of the rolling element shaft is connected to the rolling element bracket, and the other end extends toward the roller bracket. The roller bracket is provided with a clearance opening to avoid the rolling element shaft. The rolling element is rotatably connected to the portion of the rolling element shaft that passes through the clearance opening around its own axis.

[0024] Furthermore, the drive assembly also includes a rope pulley mounted on the base, the rope pulley being driven to rotate about its own axis by the drive member, and one end of the transmission rope being connected to the rope pulley; when the drive member drives the rope pulley to rotate about its own axis, the transmission rope is wound onto the rope pulley or unwound from the rope pulley.

[0025] Furthermore, there are two drive ropes, one end of each of the two drive ropes is connected to the rope pulley, and the other ends of the two drive ropes are respectively connected to opposite sides of the transducer bracket; when the rope pulley rotates around its own axis, one of the drive ropes is wound around the outer circumference of the rope pulley, and the other drive rope is unwound from the rope pulley.

[0026] Furthermore, the outer periphery of the rope wheel is provided with a first groove and a second groove in a spiral shape, wherein one of the transmission ropes is wound inside the first groove along the guiding direction of the first groove, and the other transmission rope is wound inside the second groove along the guiding direction of the second groove.

[0027] Furthermore, the outer periphery of the rope wheel is provided with a rope fixing position, which is located between the first groove and the second groove, and one end of each of the two transmission ropes is fixed on the rope fixing position.

[0028] Furthermore, the rope fixing position is provided with a fixing hole and an elastic element, and one end of the transmission rope is connected to the elastic element; a locking element for fixing the elastic element to the rope fixing position is connected to the fixing hole.

[0029] Furthermore, the elastic element includes a pair of elastic spring segments located at both ends and a connecting segment connected between the pair of spring segments. The connecting segment is pressed and fixed on the rope fixing position by the locking element. One end of the transmission rope is connected to a terminal, and one end of the terminal extends into the internal cavity of the spring segment. Each pair of spring segments is provided with a spring limiting segment that blocks the opening of the spring segment. The spring limiting segment is used to restrict the terminal from disengaging from the internal cavity of the spring segment.

[0030] Furthermore, the base is provided with a pair of guide wheel brackets, which are located on the other opposite sides of the transducer bracket. Each pair of guide wheel brackets is provided with a guide wheel, and the transmission rope is wound around the guide wheel to keep the transmission rope between the rope wheel and the transducer bracket taut.

[0031] Furthermore, the base is provided with a drive gear that is driven by the drive member to rotate around its own axis; a rope wheel bracket is connected to the base, a rope wheel central shaft is fixed on the rope wheel bracket, the rope wheel is rotatably connected to the rope wheel central shaft, and a driven gear sleeved on the outer periphery of the rope wheel central shaft is fixedly connected to the rope wheel, the driven gear meshing with the drive gear.

[0032] Furthermore, the position of the sheave bracket on the base is adjustable to adjust the distance between the driven gear and the driving gear.

[0033] Furthermore, the base is provided with a connection hole, the rope wheel bracket is provided with a bracket connection hole, and the rope wheel bracket is fixed to the base by a fastener that passes through the bracket connection hole and is positionally adjustable in the connection hole.

[0034] The present invention has the following advantages: This three-dimensional imaging ultrasonic probe utilizes a driving component to drive a transmission rope. When the transmission rope moves, it causes the transducer support to reciprocate along a pair of guide rails. During this reciprocating motion, the transducer performs ultrasonic scanning imaging of the target area. As the transducer support moves on the guide rails via the roller assembly, the rollers and rolling elements, under the elastic force of the biasing component, can always maintain contact with the first and second rolling surfaces of the guide rails. This not only reduces the requirements for the machining and assembly accuracy of the guide rails, but also ensures that the rollers and rolling elements remain in contact with the guide rails even when the guide rails deform slightly due to temperature changes or deform or wear after long-term use. This is beneficial for the use of the ultrasonic probe in environments with varying temperatures and also helps ensure the long-term reliability of the ultrasonic probe. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the overall structure of the three-dimensional imaging ultrasonic probe in an embodiment of this utility model;

[0037] Figure 2 This is a schematic diagram of the internal structure of the three-dimensional imaging ultrasonic probe in an embodiment of the present invention. Figure 1 ;

[0038] Figure 3 This is a schematic diagram of the internal structure of the three-dimensional imaging ultrasonic probe in an embodiment of the present invention. Figure 2 ;

[0039] Figure 4 This is a schematic diagram of the installation structure of the rope pulley assembly on the base in an embodiment of this utility model;

[0040] Figure 5 This is a schematic diagram of the base structure in an embodiment of the present utility model;

[0041] Figure 6 This is a schematic diagram showing the connection relationship between the rope pulley assembly, transmission rope, transducer bracket, and guide wheel in an embodiment of this utility model;

[0042] Figure 7 for Figure 6 A schematic diagram omitting the sheave assembly;

[0043] Figure 8 This is an exploded view of the rope pulley assembly in an embodiment of this utility model;

[0044] Figure 9 This is a schematic diagram of the rope pulley structure in an embodiment of this utility model;

[0045] Figure 10 This is a schematic diagram of the overall structure of the roller assembly in an embodiment of this utility model;

[0046] Figure 11 This is an exploded view of the roller assembly in an embodiment of this utility model;

[0047] Figure 12 This is a schematic diagram showing the connection relationship between the driving component and the drive gear shaft in one embodiment of the present utility model.

[0048] Explanation of reference numerals in the attached drawings: 1. Probe housing; 11. Probe acoustic window; 12. Probe tail sleeve; 2. Base; 21. Guide rail; 21a. First rolling surface; 21b. Second rolling surface; 211. Guide groove; 22. Base bracket; 23. Recess; 24. Limiting block; 201. Motor hole; 202. Connecting hole; 3. Transducer assembly; 31. Transducer bracket; 32. Transducer; 33. Bracket slot; 4. Roller assembly; 41. Roller bracket; 411. First limiting block; 42. Roller; 43. Rolling element bracket; 431. Second limiting block; 44. Rolling element; 45. Biasing element; 46. Roller shaft; 47. Pin shaft; 48. Rolling element shaft; 5. Drive element; 51. Electric 6. Machine bracket; 7. Transmission rope; 6a. First terminal; 6b. Second terminal; 7. Rope wheel assembly; 71. Rope wheel; 711. First groove; 712. Second groove; 713. Fixing hole; 72. Rope wheel bracket; 721. Bracket connecting hole; 73. Rope wheel central shaft; 74. Driven gear; 75. Rope wheel bearing; 76. Fixing component; 77. Locking component; 771. Washer; 772. Elastic washer; 78. Elastic component; 78a. Spring section; 78b. Connecting section; 78c. Spring limiting section; 81. Driving synchronous pulley; 82. Driven synchronous pulley; 83. Synchronous belt; 84. Driving gear shaft; 85. Driving gear; 86. Coupling; 91. Guide wheel bracket; 92. Guide wheel. Detailed Implementation

[0049] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0050] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] like Figure 1 The three-dimensional imaging ultrasound probe shown includes a probe housing 1, one end of which is provided with a probe acoustic window 11 and the other end is connected to a probe tail sleeve 12; the probe acoustic window 11 and the probe housing 1 enclose a potting cavity.

[0053] like Figure 1 , Figure 2 and Figure 3 As shown, the probe housing 1 contains a base 2, a transducer assembly 3, and a drive assembly. The outer periphery of the base 2 is sealed to the inner wall of the probe housing 1, and the base 2 separates the space within the probe housing 1 into a potting cavity and a mounting cavity; the probe acoustic window 11 is located on the wall of the potting cavity. The drive assembly includes a drive element 5, a pulley assembly, and a transmission rope 6 connected to the base 2. The pulley assembly is driven by the drive element 5 to rotate around its own axis. One end of the transmission rope 6 is connected to the pulley assembly, and the other end is connected to the transducer assembly 3; the drive element 5 drives the transmission rope 6 to move through the pulley assembly. The transducer assembly 3 and the drive element 5 are mounted on opposite sides of the base 2, with the transducer assembly 3 located within the potting cavity and the drive element 5 located within the mounting cavity. The potting cavity contains potting fluid, and the transducer assembly 3 is completely immersed in the potting fluid inside the potting cavity.

[0054] like Figure 2 and Figure 3 As shown, the transducer assembly 3 includes a transducer bracket 31 and a transducer 32 connected to the transducer bracket 31. Both ends of the transducer bracket 31 are rotatably connected to the guide rails 21 via roller assemblies 4. The transducer 32 includes a transmitting unit for emitting ultrasonic waves and a receiving unit for receiving ultrasonic waves. The ultrasonic waves emitted by the transmitting unit are reflected by the target area and received by the receiving unit. The ultrasonic echo signal received by the receiving unit is processed to obtain an ultrasonic image of the scanning area of ​​the transducer 32. One end of a drive rope 6 is connected to the transducer bracket 31. When the drive rope 6 moves, it can drive the transducer assembly 3 to reciprocate along the guiding direction of a pair of guide rails 21.

[0055] like Figure 2 and Figure 3As shown, a pair of guide rails 21 are provided on the base 2. Each guide rail 21 has a guide groove 211 extending through it along its own thickness. The guiding direction of the guide groove 211 is the same as the guiding direction of the guide rail 21. The guide rail 21 has a first rolling surface 21a and a second rolling surface 21b that are parallel to each other and not coplanar. The first rolling surface 21a is the surface of the guide rail 21 facing away from the base 2, and the second rolling surface 21b is a groove sidewall of the guide groove 211 near the first rolling surface 21a.

[0056] like Figure 2 and Figure 3 As shown, in some embodiments, both the first rolling surface 21a and the second rolling surface 21b are arc-shaped curved surfaces. The shapes of the first rolling surface 21a and the second rolling surface 21b define the path of movement of the transducer support 31 and result in the scanning area of ​​the transducer 32 not being a simple square or rectangular volume. Compared with the prior art where the transducer assembly 3 reciprocates on a linear guide rail, the transducer assembly 3 reciprocates on a track with a larger curvature, which can obtain a wider scannable field of view in front of the probe.

[0057] like Figure 3 and Figure 4 As shown, in some embodiments, a base bracket 22 is fixed to the side of the base 2 facing the guide rail 21, and both ends of the base bracket 22 are fixed to the base 2 with screws. The driving component 5 is specifically a motor, which is fixedly connected to the side of the base bracket 22 facing away from the base 2 via a motor bracket 51. The output end of the driving component 5 is connected to a synchronous belt drive assembly, which is located within the installation space enclosed by the base bracket 22 and the base 2. The synchronous belt drive assembly includes a driving synchronous pulley 81, a driven synchronous pulley 82, and a synchronous belt 83. The driving synchronous pulley 81 is fixedly connected to the output shaft of the motor, the driven synchronous pulley 82 is located on one side of the driving synchronous pulley 81, and the synchronous belt 83 is sleeved between the driven synchronous pulley 82 and the driving synchronous pulley 81. The outer circumference of both the driving synchronous pulley 81 and the driven synchronous pulley 82 is provided with teeth, and the synchronous belt 83 is a toothed synchronous belt with an internal tooth structure. A drive gear shaft 84 is fixed at the central axis of the driven synchronous pulley 82. One end of the drive gear shaft 84 passes through the motor hole 201 on the base 2. The drive gear shaft 84 passes through the base 2 via a bearing seal, preventing the potting fluid in the potting cavity on one side of the base 2 from flowing out. A drive gear 85 is fixed to the outer periphery of the drive gear shaft 84, located on the side of the base 2 facing the transducer assembly 3. The drive member 5 drives the driven synchronous pulley 82 to rotate via the drive synchronous pulley 81 and the synchronous belt 83. The driven synchronous pulley 82 then drives the drive gear shaft 84 and the drive gear 85 to rotate around their own axial direction. In some embodiments, such as Figure 12As shown, when the driving force of the drive component 5 is large enough to meet the driving force required for the reciprocating motion of the transducer assembly 3, the output shaft of the drive component 5 can be directly connected to the drive gear shaft 84 through the coupling 86, thereby eliminating the need for a pair of synchronous pulleys.

[0058] like Figure 4 and Figure 6 As shown, in some embodiments, the pulley assembly is located on the side of the base 2 facing the transducer bracket 31. The pulley assembly includes a pulley 71, a pulley bracket 72, a pulley central shaft 73, a driven gear 74, and a pulley bearing 75. The pulley bracket 72 is connected to the base 2, the pulley central shaft 73 is fixed to the pulley bracket 72, and the pulley 71 is rotatably connected to the pulley central shaft 73 via the pulley bearing 75, which is located inside the bearing bore of the pulley 71. The driven gear 74 is sleeved on the outer circumference of the pulley central shaft 73, and the driven gear 74 and the pulley 71 are interference-fitted, and the driven gear 74 meshes with the driving gear 85. One end of the drive rope 6 is connected to the pulley 71, and the other end of the drive rope 6 is connected to the transducer bracket 31. The driving component 5 drives the active gear 85 to rotate around its own axis, which in turn drives the driven gear 74 and the rope wheel 71 to rotate around its own axis. This transmission method, which drives the rope wheel 71 to rotate through gear transmission, thereby enabling the transmission rope 6 to be wound onto or unwound from the rope wheel 71, has the advantages of high transmission accuracy and good transmission stability. It can improve the stability of the transmission rope 6 when driving the transducer bracket 31 to move, thereby improving the accuracy of the three-dimensional scanning imaging of the transducer 32.

[0059] like Figure 2 , Figure 4 and Figure 6 As shown, in some embodiments, the base 2 is provided with a pair of guide wheel brackets 91, which are located on opposite sides of the transducer bracket 31. Each guide wheel bracket 91 is provided with a guide wheel 92, and the transmission rope 6 is wound around the guide wheel 92. The guide wheel 92 can change the direction of the transmission rope 6, allowing the transmission rope 6 to be connected to the transducer bracket 31 in a direction perpendicular to the transducer bracket 31, so that the transmission rope 6 between the pulley 71 and the transducer bracket 31 can be kept taut.

[0060] like Figure 4 and Figure 5 As shown, in some embodiments, the base 2 has a recess 23 on the side facing the transducer bracket 31, and the motor mounting hole 201 is formed on one side of the bottom of the recess 23. Two connecting holes 202 are also formed on the bottom of the recess 23, and a limiting block 24 is provided on one side of each connecting hole 202. The sheave bracket 72 is located between a pair of limiting blocks 24. The pair of limiting blocks 24 can restrict the installation orientation of the sheave bracket 72, which helps to improve the installation accuracy of the sheave bracket 72 and ensures that the driven gear 74 on the sheave bracket 72 can mesh with the driving gear 85.

[0061] like Figure 4 , Figure 6 and Figure 8 As shown, in some embodiments, the sheave bracket 72 is provided with a shaft connection hole 722, and the lower end of the sheave central shaft 73 is fixedly connected to the shaft connection hole 722 of the sheave bracket 72. The sheave bracket 72 is also provided with a pair of bracket connection holes 721, which are correspondingly positioned to the pair of connection holes 202 on the recess 23. The sheave bracket 72 is fixed to the base 2 by a fixing member 76 that passes through the bracket connection holes 721 and is adjustable in position within the connection holes 202. The fixing member 76 is specifically a screw. With this configuration, the distance between the driven gear 74 and the driving gear 85 can be adjusted by adjusting the installation position of the sheave bracket 72, thereby reducing the backlash between the driven gear 74 and the driving gear 85 after assembly. It can be understood here that the bracket connection hole 721 on the sheave bracket 72 can be an oblong hole, and the corresponding hole on the recess 23 can be a circular hole, as long as the position of the sheave bracket 25 within the recess 23 is adjustable.

[0062] Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, there are two transmission ropes 6; one end of each transmission rope 6 is connected to a rope pulley 71, and the other ends of each transmission rope 6 are respectively connected to opposite sides of the transducer bracket 31. One end of each transmission rope 6 is connected to a first terminal 6a, and the other end is connected to a second terminal 6b; both the first terminal 6a and the second terminal 6b are cylinders with a diameter larger than that of the transmission rope 6. Support slots 33 are provided on opposite sides of the transducer bracket 31. The first terminal 6a of one end of the transmission rope 6 is engaged with the rope pulley 71, and the second terminal 6b of the other end of the transmission rope 6 is engaged with the support slots 33. When the rope pulley 71 rotates around its own axis, one transmission rope 6 is wound around the outer circumference of the rope pulley 71, and the other transmission rope 6 is unwound from the rope pulley 71. This transmission method, in which the two transmission ropes 6 work together to drive the transducer bracket 31 to move along the guiding direction of a pair of guide rails 21, can further improve the stability of the transducer bracket 31 during movement.

[0063] like Figure 6 , Figure 8 and Figure 9As shown, in some embodiments, the outer periphery of the rope pulley 71 is provided with a spiral-shaped first groove 711 and a second groove 712. One transmission rope 6 is wound inside the first groove 711 along the guiding direction of the first groove 711, and another transmission rope 6 is wound inside the second groove 712 along the guiding direction of the second groove 712. The arrangement of the first groove 711 and the second groove 712 on the rope pulley 71 allows the transmission rope 6 to be wound onto the outer wall of the rope pulley 71 along a predetermined trajectory. This not only makes the winding motion of the transmission rope 6 smoother and improves the stability of the transducer bracket 31 during movement, but also reduces wear caused by disordered winding and mutual compression friction of the transmission rope 6, thereby increasing the service life of the transmission rope 6.

[0064] like Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the outer periphery of the rope wheel 71 is provided with a rope fixing position, located between the first groove 711 and the second groove 712, and one end of each of the two transmission ropes 6 is fixed to the rope fixing position. Fixing one end of each of the two transmission ropes 6 to the same rope fixing position allows for simultaneous fixing of both transmission ropes 6 to the rope wheel 61, simplifying the fixing method. Furthermore, the rope fixing position is provided with a fixing hole 713 and an elastic element 78, with one end of the transmission rope 6 connected to the elastic element 78; a locking element 77 for fixing the elastic element 78 to the rope fixing position is connected to the fixing hole 713. The locking element 77 is specifically a screw, and a washer 771 and an elastic washer 772 are also provided between the locking element 77 and the rope fixing position. Connecting one end of the transmission rope 61 to the elastic element 78 helps maintain the tension of the transmission rope 61 and reduces its vibration.

[0065] like Figure 7 and Figure 8 As shown, in some embodiments, the elastic member 78 includes a pair of elastic spring segments 78a located at both ends and a connecting segment 78b connected between the pair of spring segments 78a. The connecting segment 78b is pressed and fixed at the rope fixing position by the locking member 77. The elastic member 78 also includes a spring limiting segment 78c blocking an opening on one side of the spring segment 78a. The inner hole of the spring limiting segment 78c is smaller than the inner hole of the spring segment 78a. The inner hole of the spring limiting segment 78c allows the transmission rope 6 to pass through but does not allow the first terminal 6a to pass through. The first terminal 6a at one end of the transmission rope 6 extends into the internal cavity of the spring segment 78a. The spring limiting segment 78c blocks one side of the first terminal 6a to prevent the first terminal 6a from disengaging from the internal cavity of the spring segment 78a.

[0066] like Figure 2 , Figure 3 , Figure 10 and Figure 11As shown, the roller assembly 4 includes a roller bracket 41, a roller 42, a rolling element bracket 43, a rolling element 44, a biasing element 45, a roller shaft 46, a pin 47, and a rolling element shaft 48. The roller bracket 41 is fixedly connected to one end of the transducer bracket 31. The roller 42 is connected to the roller bracket 41 and rotatable about its own axis, with its rolling surface in contact with the first rolling surface 21a of the guide rail 21. The pin 47 passes through the rolling element bracket 43, which is rotatably connected to the roller bracket 41 about the axis of the pin 47. The rolling element 44 is connected to the rolling element bracket 43 and rotatable about its own axis, with one end of the rolling element 44 extending into the guide groove 211 of the guide rail 21. The roller 42 and the rolling element 44 are both located on the same side of the roller bracket 41, and the axial directions of the roller 42, the rolling element 44, and the pin 47 are parallel. The biasing member 45 is elastically disposed between the roller bracket 41 and the rolling member bracket 43. The biasing force of the biasing member 45 drives the roller bracket 41 to rotate relative to the axis of the pin 47 so that the rolling member 44 fits against the second rolling surface 21b of the guide groove 211.

[0067] like Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, in some embodiments, there are two rollers 42, both mounted on roller brackets 41 via roller shafts 46, with each roller 42 rotatably connected to the roller shafts 46 about its own axis. There is one rolling element 44, mounted on a rolling element bracket 43 via a rolling element shaft 48. The rolling element shaft 48 is interference-fitted into the rolling element bracket 43, with one end interference-fitted into a bracket hole in the rolling element bracket 43 and the other end extending towards the roller bracket 41. The roller bracket 41 has a clearance opening 414 to avoid the rolling element shaft 48, and the rolling element 44 is rotatably connected to the portion of the rolling element shaft 48 that passes through the clearance opening 414 about its own axis. This arrangement allows one rolling element 44 and two rollers 42 to be located on the same side of the roller bracket 41 and to roll on two different rolling surfaces of the same guide rail 21 respectively.

[0068] like Figure 10 and Figure 11 As shown, in some embodiments, the biasing member 45 is specifically a torsion spring sleeved on the outer periphery of the pin 47, located between the roller bracket 41 and the rolling element bracket 43. The roller bracket 41 is provided with a first limiting block 411 extending in the direction of the rolling element bracket 43, and the rolling element bracket 43 is provided with a second limiting block 431 extending in the direction of the roller bracket 41; one protruding end 45a of the torsion spring abuts against the first limiting block 411, and the other protruding end 45b of the torsion spring abuts against the second limiting block 431.

[0069] like Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, in some embodiments, the roller bracket 41 has a positioning groove 412 at one end facing the transducer bracket, and the bottom of the positioning groove 412 has a mounting hole 413. The end of the transducer bracket 31 is embedded in the positioning groove 412 and fixed to the roller bracket 41 by screws passing through the mounting hole 413.

[0070] In summary, the three-dimensional imaging ultrasonic probe provided in this embodiment utilizes the driving component 5 to drive the transmission rope 6. When the transmission rope 6 moves, it drives the transducer support 31 to reciprocate along the guiding direction of a pair of guide rails 2. During this reciprocating motion, the transducer 32 performs ultrasonic scanning imaging of the target area. When the transducer support 31 moves on the guide rails 2 via the roller assembly 4, the rollers 42 and rolling elements 44, under the elastic force of the biasing component 45, can always maintain contact with the first rolling surface 21a and the second rolling surface 21b of the guide rails 2. This not only reduces the requirements for the machining and assembly accuracy of the guide rails 2, but also ensures that the rollers 42 and rolling elements 44 remain in contact with the guide rails even when the guide rails 2 experience slight deformation due to temperature changes or deformation or wear after long-term use. This is beneficial for the use of the ultrasonic probe in environments with temperature variations and also helps ensure the reliability of the ultrasonic probe during long-term operation.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A three-dimensional imaging ultrasonic probe, characterized in that, include: Probe housing (1); A base (2) is disposed inside the probe housing (1), and a pair of guide rails (21) are provided on the base (2); the guide rails (21) are provided with a first rolling surface (21a) and a second rolling surface (21b) that are parallel to each other and not coplanar. The transducer assembly (3) includes a transducer bracket (31) and a transducer (32) connected to the transducer bracket (31); both ends of the transducer bracket (31) are respectively rotatably connected to the guide rail (21) by a roller assembly (4); The drive assembly includes a drive member (5) connected to the base (2) and a transmission rope (6) driven by the drive member (5); one end of the transmission rope (6) is connected to the transducer assembly (3) for driving the transducer assembly (3) to move along the guide direction of a pair of guide rails (21); The roller assembly (4) includes: A roller bracket (41) is connected to the transducer bracket (31); A roller (42) is connected to the roller bracket (41) and is rotatable about its own axis. The roller (42) is in contact with the first rolling surface (21a). A rolling element bracket (43) is rotatably connected to the roller bracket (41) about a rotation axis; A rolling element (44) is connected to the rolling element bracket (43) and is rotatable about its own axis; A biasing member (45) is elastically disposed between the roller bracket (41) and the rolling element bracket (43); the biasing force of the biasing member (45) drives the roller bracket (41) to rotate relative to the rotation axis so that the rolling element (44) fits against the second rolling surface (21b).

2. The three-dimensional imaging ultrasonic probe according to claim 1, characterized in that, The first rolling surface (21a) is the surface of the guide rail (21) facing away from the base (2); the guide rail (21) has a guide groove (211), one end of the rolling element (44) extends into the guide groove (211), and the second rolling surface (21b) is a groove side wall surface of the guide groove (211) near the first rolling surface (21a).

3. The three-dimensional imaging ultrasonic probe according to claim 1, characterized in that, A pin (47) is fixedly connected to the roller bracket (41). The axis of the pin (47) is the rotation axis. The pin (47) passes through the rolling element bracket (43). The rolling element bracket (43) is rotatably arranged around the axis of the pin (47). The biasing element (45) is a torsion spring sleeved on the outer periphery of the pin (47). The torsion spring is located between the roller bracket (41) and the rolling element bracket (43). One protruding end of the torsion spring abuts against the roller bracket (41), and the other protruding end of the torsion spring abuts against the rolling element bracket (43).

4. The three-dimensional imaging ultrasonic probe according to claim 3, characterized in that, The roller bracket (41) is provided with a first limiting block (411) extending in the direction of the rolling element bracket (43), and the rolling element bracket (43) is provided with a second limiting block (431) extending in the direction of the roller bracket (41); one protruding end of the torsion spring abuts against the first limiting block (411), and the other protruding end of the torsion spring abuts against the second limiting block (431).

5. The three-dimensional imaging ultrasonic probe according to claim 1, characterized in that, The rolling element (44) is mounted on the rolling element bracket (43) via a rolling element shaft (48). One end of the rolling element shaft (48) is connected to the rolling element bracket (43), and the other end extends toward the roller bracket (41). The roller bracket (41) is provided with a clearance opening (414) to avoid the rolling element shaft (48). The rolling element (44) is rotatably connected to the portion of the rolling element shaft (48) that passes through the clearance opening (414) about its own axis.

6. The three-dimensional imaging ultrasonic probe according to any one of claims 1-5, characterized in that, The drive assembly also includes a pulley (71) mounted on the base (2). The pulley (71) is driven by the drive member (5) to rotate around its own axis. One end of the transmission rope (6) is connected to the pulley (71). When the drive member (5) drives the pulley (71) to rotate around its own axis, the transmission rope (6) is wound onto the pulley (71) or unwound from the pulley (71). There are two transmission ropes (6). One end of each transmission rope (6) is connected to the rope wheel (71), and the other end of each transmission rope (6) is connected to the opposite sides of the transducer bracket (31). When the rope wheel (71) rotates around its own axis, one of the transmission ropes (6) is wound around the outer circumference of the rope wheel (71), and the other transmission rope (6) is unwound from the rope wheel (71). The outer periphery of the rope wheel (71) is provided with a spiral first groove (711) and a second groove (712), wherein one of the transmission ropes (6) is wound inside the first groove (711) along the guiding direction of the first groove (711), and the other transmission rope (6) is wound inside the second groove (712) along the guiding direction of the second groove (712). The outer periphery of the rope wheel (71) is provided with a rope fixing position, which is located between the first groove (711) and the second groove (712). One end of each of the two transmission ropes (6) is fixed on the rope fixing position. The rope fixing position is provided with a fixing hole (713) and an elastic element (78), and one end of the transmission rope (6) is connected to the elastic element (78); a locking element (77) for fixing the elastic element (78) on the rope fixing position is connected to the fixing hole (713); The elastic element (78) includes a pair of elastic spring segments (78a) located at both ends and a connecting segment (78b) connected between the pair of spring segments (78a). The connecting segment (78b) is pressed and fixed on the rope fixing position by the locking element (77). One end of the transmission rope (6) is connected to a first terminal (6a), and one end of the first terminal (6a) extends into the internal cavity of the spring segment (78a). Each pair of spring segments (78a) is provided with a spring limiting segment (78c) that blocks the opening of the spring segment (78a). The spring limiting segment (78c) is used to restrict the first terminal (6a) from disengaging from the internal cavity of the spring segment (78a).

7. The three-dimensional imaging ultrasonic probe according to claim 6, characterized in that, The base (2) is provided with a pair of guide wheel brackets (91), which are located on the other opposite sides of the transducer bracket (31). Each pair of guide wheel brackets (91) is provided with a guide wheel (92). The transmission rope (6) is wound around the guide wheel (92) to keep the transmission rope (6) between the rope wheel (71) and the transducer bracket (31) taut.

8. The three-dimensional imaging ultrasonic probe according to claim 7, characterized in that, The base (2) is provided with a drive gear (85) that is driven by the drive member (5) to rotate around its own axis; a rope wheel bracket (72) is connected to the base (2), a rope wheel central shaft (73) is fixed on the rope wheel bracket (72), the rope wheel (71) is rotatably connected to the rope wheel central shaft (73), and a driven gear (74) sleeved on the outer periphery of the rope wheel central shaft (73) is fixedly connected to the rope wheel (71), and the driven gear (74) meshes with the drive gear (85).

9. The three-dimensional imaging ultrasonic probe according to claim 8, characterized in that, The position of the sheave bracket (72) on the base (2) is adjustable to adjust the distance between the driven gear (74) and the driving gear (85).

10. The three-dimensional imaging ultrasonic probe according to claim 9, characterized in that, The base (2) is provided with a connection hole (202), and the rope wheel bracket (72) is provided with a bracket connection hole (721). The rope wheel bracket (72) is fixed to the base (2) by a fastener (76) that passes through the bracket connection hole (721) and is positionally adjustable in the connection hole (202).

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