Ultrasonic probe

Abstract

An ultrasonic probe, comprising a rotary inner core (1), an inductor (2), a sealing portion (3), and a transducer (4) coaxially connected to the rotary inner core (1), wherein the rotary inner core (1) has a first surface (11) and a second surface (12) adjacent to each other, the first surface (11) is provided with a first through hole (13), the first through hole (13) being used for communicating the rotary inner core (1) and the transducer (4), and the second surface (12) is provided with N second through holes (15), N being a positive integer; the sealing portion (3) is sleeved outside of the rotary inner core (1) and covers openings of the N second through holes (15); and, when the inductor (2) is mounted into the rotary inner core (1) through the second through holes (15), the sealing portion (3) is heated and contracted to abut against the inductor (2), fixing the center of gravity thereof onto the central axis of the rotary inner core (1). In the present ultrasonic probe, by means of improving the structures of the rotary inner core (1) and the sealing portion (3), the center of gravity of the inductor (2) is fixed on the central axis of the rotary inner core (1), thereby achieving the effect of preventing weightlessness due to centrifugal force, and avoiding misdiagnosis caused by image shaking and clinical image distortion.

Description

An ultrasonic probe Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an ultrasonic probe. Background Art

[0002] Bronchial ultrasound is a new technology developed in recent years. It uses an ultrasonic bronchoscope or a miniature ultrasound probe to enter the trachea and bronchial lumen through the bronchoscope. Scanning can then clearly display the various layers of the tracheal and bronchial wall structure, including the adjacent tissue structures outside the lumen. For example, ultrasound imaging of mediastinal lymph nodes. Currently, ultrasound products used in clinical practice are generally divided into two categories. One type is an ultrasound bronchoscope, which is an ultrasound probe embedded in an optical fiber structure that can scan along the long axis of the airway and can be used to guide needle aspiration biopsy in real time. The other type is a radial bronchial ultrasound probe, which needs to enter the airway through the biopsy channel of the bronchoscope and can produce a 360-degree image perpendicular to the airway axis. Currently, ultrasound probes contain a rotary joint, an inductor, and a transducer. The transducer is connected to the rotary joint, and the inductor is mounted within the rotary joint. However, to install the inductor and rotary joint, the rotating core is cut in half to form a groove. Two threaded holes are then provided at the bottom of the groove. The inductor is then fixed to the groove bottom using screws and threaded holes. A brass sheet is then placed to seal the cut-out groove. As shown in Figure 1, since only a single groove is cut on one side, the brass sheet is only placed on one side of the rotating core. Furthermore, the brass sheet and the rotating core are made of different materials. Therefore, the circumferential weight of the portion containing the brass sheet and the portion not containing the brass sheet differs. This causes the center of gravity of the inductor to not coincide with the central axis of the rotating core, resulting in an imbalanced weight of the rotating core and the inductor. This weight imbalance prevents the rotating core from rotating around the same axis. Consequently, the centrifugal force of weightlessness causes the transducer to shake, which in turn causes image shakiness, hindering clinical image diagnosis and easily leading to misdiagnosis. Therefore, there is an urgent need for an ultrasound probe that can balance the circumferential weight to prevent the image from shaking.

[0003] Summary of the Invention

[0004] The object of the present invention is to provide an ultrasound probe, which improves the structure of the rotating inner core and the sealing part so as to fix the center of gravity of the inductor on the central axis of the rotating inner core, thereby preventing centrifugal force from causing weightlessness, thereby avoiding image shaking and further avoiding misdiagnosis caused by clinical image distortion.

[0005] To achieve the above object, the present invention provides an ultrasonic probe comprising a rotating inner core, an inductor and a sealing portion, wherein:

[0006] The rotating inner core has a first surface and a second surface adjacent to each other, the first surface is provided with a first through hole, the first through hole is communicated with the inner cavity of the rotating inner core, and the second surface is provided with N second through holes, where N is a positive integer;

[0007] The sealing portion is sleeved outside the rotating inner core and covers the openings of the N second through holes;

[0008] When the inductor is installed into the rotating inner core through the second through hole, the sealing portion shrinks due to heat to contact the center of gravity of the inductor and is fixed on the central axis of the rotating inner core.

[0009] Optionally, the sealing portion is a sealing tube, wherein the sealing tube is made of heat shrinkable material.

[0010] Optionally, it also includes a transducer, an outer tube and a driving flexible shaft, wherein the rotating inner core, the inductor, the sealing part, the transducer and the driving flexible shaft are all arranged in the outer tube; the driving flexible shaft is used to connect the transducer and the rotating inner core.

[0011] Optionally, it also includes a first wire and a second wire respectively arranged on the positive and negative poles of the inductor, wherein the end of the first wire away from the inductor is electrically connected to the negative pole of the male connector, and the end of the second wire away from the inductor is electrically connected to the positive pole of the transducer.

[0012] Optionally, the N second through holes are divided into several groups, and the several groups of second through holes are arranged in a ring shape around the central axis of the rotating inner core, wherein the distance between two adjacent second through holes in each group is consistent.

[0013] Optionally, a step for supporting the inductor is further provided in the rotating inner core, and a fixed block is provided at one end of the inductor away from the step, wherein the weight of the step is consistent with that of the fixed block.

[0014] Optionally, the inductor is fixedly connected to the step, wherein the inductor and the step are fixed by gluing.

[0015] Optionally, it further includes a recessed portion provided in the rotating inner core, and a protruding portion provided on the inductor, wherein when the inductor is installed into the rotating inner core through the second through hole, the protruding portion enters into the recessed portion.

[0016] Optionally, the recessed portion is a third through hole provided on the rotating inner core;

[0017] The protrusion includes a fourth through hole provided on the inductor, a movable post movably provided in the fourth through hole, and an elastic member provided in the fourth through hole and used for connecting the fourth through hole and the movable post.

[0018] Optionally, it further includes two contact plates respectively provided on the opposite ends of the inductor, and a contact rod connected to the contact plates, the contact rod is movably inserted into a contact hole opened on the inductor, and a reset spring is wound around the outside of the contact rod, and the two ends of the reset spring are respectively fixedly connected to the side wall of the contact rod and the side wall of the contact hole, wherein the contact hole is connected to the fourth through hole, and the contact rod is matched with the movable column.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention provides N second through holes on the rotating inner core to balance the weight imbalance of the rotating inner core caused by the openings; at the same time, the sealing part is axially sleeved on the outside of the rotating inner core, so that the weight of the sealing part on the circumference of the rotating inner core is consistent; and due to the interference of the sealing part, the center of gravity of the inductor is fixed on the central axis of the rotating inner core, which can further prevent the problem of centrifugal weightlessness, and then the rotating inner core can move with the transducer on the same rotating axis, avoiding shaking of the generated image, thereby avoiding misdiagnosis caused by clinical image distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of the combined structure of an inductor, a rotating inner core and a brass sheet in the prior art;

[0022] FIG2 is a schematic structural diagram of a first embodiment of the assembly of an inductor, a sealing portion, and a rotating inner core according to the present invention;

[0023] FIG3 is a schematic top view of the rotating inner core in the first embodiment of the assembly structure of the inductor, the sealing portion, and the rotating inner core of the present invention;

[0024] FIG4 is a schematic structural diagram of an inductor in a first embodiment of an assembly structure of an inductor, a sealing portion, and a rotating inner core according to the present invention;

[0025] FIG5 is a schematic diagram of a partial structure of an ultrasonic probe in the present invention;

[0026] FIG6 is a schematic structural diagram of a second embodiment of the assembly of an inductor, a sealing portion, and a rotating inner core according to the present invention;

[0027] FIG7 is a schematic structural diagram of the concave portion and the convex portion of the present invention;

[0028] FIG8 is a schematic diagram of the combined structure of the contact plate, the contact rod and the return spring in the present invention;

[0029] FIG9 is a schematic diagram of an exploded structure of a third embodiment of the assembly structure of an inductor, a sealing portion, and a rotating inner core according to the present invention.

[0030] Figure numerals 1, rotating inner core; 11, first surface; 12, second surface; 13, first through hole; 14, inner cavity; 15, second through hole; 16, step; 17, fixed block; 18, recessed portion; 19, protruding portion; 191, fourth through hole; 192, movable column; 193, elastic member; 2, inductor; 21, interference plate; 22, interference rod; 23, interference hole; 24, reset spring; 25, L-shaped blocking plate; 3, sealing portion; 4, transducer; 5, outer tube; 6, driving flexible shaft; 7, first wire; 8, second wire. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs. The words "including" and similar words used in this article mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0032] In response to the problems existing in the prior art, an embodiment of the present invention provides an ultrasonic probe; FIG2 is a schematic structural diagram of a first embodiment of an assembly of an inductor, a sealing portion, and a rotating inner core in the present invention; FIG3 is a schematic top structural diagram of a rotating inner core in a first embodiment of an assembly structure of an inductor, a sealing portion, and a rotating inner core in the present invention; FIG4 is a schematic structural diagram of an inductor in a first embodiment of an assembly structure of an inductor, a sealing portion, and a rotating inner core in the present invention; as shown in FIG2 to FIG4, the ultrasonic probe includes a rotating inner core 1, an inductor 2, and a sealing portion 3, wherein the rotating inner core 1 has an adjacent first surface 11 (which can be connected The first surface 11 is provided with a first through hole 13, which is connected to the inner cavity 14 of the rotating inner core 1. The second surface 12 is provided with N second through holes 15, where N is a positive integer. The sealing portion 3 is sleeved on the outside of the rotating inner core 1 and covers the openings of the N second through holes 15. When the inductor 2 is installed in the rotating inner core 1 through the second through holes 15, the sealing portion 3 shrinks due to heat to contact the center of gravity of the inductor 2 and is fixed to the central axis of the rotating inner core 1. In this embodiment, the second through hole 15 is not connected to the first through hole 13.

[0033] Figure 5 is a schematic diagram of the partial structure of the ultrasonic probe in the present invention; as shown in Figure 5, the ultrasonic probe also includes a transducer 4, an outer tube 5 and a driving flexible shaft 6, wherein the rotating inner core 1, the inductor 2, the sealing part 3, the transducer 4 and the driving flexible shaft 6 are all arranged in the outer tube 5; the driving flexible shaft 6 is used to connect the transducer 4 and the rotating inner core 1.

[0034] The present invention provides N second through holes 15 on the rotating inner core 1 to balance the weight imbalance of the rotating inner core 1 caused by the openings; at the same time, the sealing portion 3 is axially sleeved on the outside of the rotating inner core 1, so that the weight of the sealing portion 3 on the circumference of the rotating inner core 1 is uniform; and due to the interference of the sealing portion 3, the center of gravity of the inductor 2 is fixed on the central axis of the rotating inner core 1, which can further prevent the problem of centrifugal weightlessness, and then the rotating inner core 1 can move with the transducer 4 on the same rotating axis to avoid shaking and causing image distortion. At the same time, in order to achieve electrical matching, the inductor 2 is added to the present invention, and the external structure of the inductor 2 is improved so that it can match the structure of the rotating inner core 1. The inductor 2 designed to match the inherent properties of the inductor 2 is connected in series with the transducer 4 to form an LC resonant circuit. When in resonance, the capacitive reactance and the inductive reactance cancel each other out to 0. At this time, the total impedance of the capacitor is minimum, and the complex impedance phase is 0, which manifests as a pure resistance characteristic, that is, the self-resonant frequency of the capacitor. The excitation energy of the magnetostrictive sensor is mainly concentrated near the designed center frequency. The coil is impedance matched by an external circuit, and the slope change of the impedance measurement line is intensified, thereby increasing the energy of the ultrasonic wave excited near the slope.

[0035] In one embodiment, the ultrasonic probe further includes a first wire 7 and a second wire 9 respectively arranged on the positive and negative poles of the inductor 2, wherein the end of the first wire 7 away from the inductor 2 is electrically connected to the negative pole of the male connector, and the end of the second wire 9 away from the inductor 2 is electrically connected to the positive pole of the transducer 4, as shown in Figure 4.

[0036] In one embodiment, the sealing portion 3 is a sealing tube, wherein the sealing tube is made of heat shrinkable material. In the present invention, a sealing tube is used instead of the existing brass sheet to seal the second through hole 15 on the rotating inner core 1. By wrapping the sealing portion 3 around the outside of the rotating inner core 1, the problem of unbalanced weight of the rotating inner core 1 when the rotating inner core 1 is blocked only on one side can be avoided, thereby effectively preventing the problem of centrifugal weight loss when the rotating inner core 1 rotates. At the same time, the processing difficulty can be reduced, so that the sealing tube can be quickly and firmly fixed to the outside of the rotating inner core 1. In one example, the sealing tube is a circular tube, but is not limited to a circular tube.

[0037] In one embodiment, the number of the second through holes 15 can be one, two, three, or more. Preferably, there are two second through holes 15, and when there are two second through holes 15, the two second through holes 15 are arranged opposite each other. When there are three second through holes 15, the three second through holes 15 are arranged in an equidistant annular pattern around the central axis of the rotating inner core 1. This arrangement can avoid the problem of centrifugal weight loss caused by uneven arrangement of the second through holes 15 on the rotating inner core 1.

[0038] In the first embodiment of the assembly structure of the inductor 2, the sealing portion 3 and the rotating inner core 1, there are two second through holes 15, and the two second through holes 15 are arranged opposite to each other. When in use, the inductor 2 is installed in the rotating inner core 1 through one of the second through holes 15, and then the sealing portion 3 is sleeved on the outside of the rotating inner core 1 and blocks the opening of the second through hole 15. The sealing portion 3 is then heat-treated, and the sealing portion 3 shrinks due to the heat. During the shrinkage process, it forms a resistance to the inductor 2, and the center of gravity of the inductor 2 that is resisted remains on the central axis of the rotating inner core 1. In this embodiment, by opening two opposite second through holes 15 on the rotating inner core 1 (it can be understood that the second through holes 15 are opened in front and behind the rotating inner core 1), no second through holes 15 are opened on the upper and lower surfaces, and the inductor 2 is installed into the rotating inner core 1 through the second through hole 15 in the front.

[0039] In one embodiment, the rotating inner core 1 is further provided with a step 16 for supporting the inductor 2. A fixing block 17 is provided at the end of the inductor 2 away from the step 16, wherein the weight of the step 16 and the fixing block 17 are the same. The combined weight of the step 16 and the fixing block 17 is used to fill the missing portion of the rotating inner core 1 at the two second through holes 15, thereby ensuring that the weight of the front and back of the rotating inner core 1 is consistent with the weight of the top and bottom, thereby maintaining the weight consistency of the rotating inner core 1 in the circumferential direction. At the same time, the weight of the step 16 and the fixing block 17 are consistent, and the step 16 and the fixing block 17 are respectively provided on both sides of the inductor 2, thereby balancing the weight in the front and back directions, thereby maintaining the center of gravity of the inductor 2 on the central axis of the rotating inner core 1. In this embodiment, the inductor 2 and the fixing block 17 form a T-shaped structure.

[0040] The existing inductor 2 and the rotating inner core 1 are fixed by two screws, which makes the installation and disassembly process cumbersome and complicated to operate; on the other hand, the screws themselves have weight, which increases the risk of centrifugal weightlessness. In order to solve the above problem, in one embodiment, the inductor 2 is fixedly connected to the step 16, wherein the inductor 2 and the step 16 are fixed by gluing. The gluing method used in this embodiment can reduce the difficulty of fixing the inductor 2 and the step 16. At the same time, since the weight of the fixing glue is very light and can be ignored relative to the rotating inner core 1, the problem of centrifugal weightlessness caused by the fixing glue can be eliminated. Of course, in other embodiments, the inductor 2 and the step 16 can also be fixed by other methods besides gluing.

[0041] It is worth noting that in the first embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1, the inductor 2 is fixed on the step 16, and the thermal shrinkage of the sealing part 3 will form a resistance to the inductor 2, thereby fixing the inductor 2 more firmly on the step 16.

[0042] At the same time, in the first embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1, the first wire 7 is inserted into the left end of the rotating inner core 1 and comes out from the second through hole 15 in the front; the second wire 9 is inserted into the rotating inner core 1 through the first through hole 13 from the right side and comes out from the second through hole 15 in the front; then the first wire 7 and the second wire 9 are respectively connected to the positive and negative poles of the inductor 2. After the inductor 2 is connected to the first wire 7 and the second wire 9, the inductor 2 is inserted into the rotating inner core 1 from the second through hole 15 in the front.

[0043] The present invention also provides a second embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1; FIG6 is a schematic structural diagram of the second embodiment of the assembly of the inductor, the sealing part and the rotating inner core in the present invention; referring to FIG6 , two opposite second through holes 15 are provided on the rotating inner core 1, and the two second through holes 15 are provided in front and behind the rotating inner core 1. It is worth noting that the second through holes 15 are not provided above and below the rotating inner core 1; the inductor 2 is installed in the rotating inner core 1 through the second through holes 15; in this embodiment, the inductor 2 is a rectangular structure, and the length direction of the inductor 2 is provided along the two second through holes 15. Such an arrangement can fill the missing part of the rotating inner core 1 at the two second through holes 15 by the mass of the inductor 2, thereby balancing the weight of the rotating inner core 1 by the inductor 2. In this embodiment, the second through hole 15 is not connected to the first through hole 13.

[0044] FIG7 is a schematic structural diagram of the recessed portion and the protruding portion in the present invention; as shown in FIG7 , the ultrasonic probe further includes a recessed portion 18 provided in the rotating inner core 1, and a protruding portion 19 provided on the inductor 2, wherein when the inductor 2 is loaded into the rotating inner core 1 through the second through hole 15, the protruding portion 19 enters the recessed portion 18. During use, the cooperation between the recessed portion 18 and the protruding portion 19 can limit the position of the inductor 2 in the rotating inner core 1. In this way, during installation, it is only necessary to align the positions of the recessed portion 18 and the protruding portion 19 to adjust the position of the inductor 2 in the rotating inner core 1, thereby reducing the difficulty of installing the device and improving the installation efficiency of the device. Preferably, the combination of the recessed portion 18 and the protruding portion 19 is provided in two groups, and the two groups of the recessed portions 18 and the protruding portions 19 are symmetrically arranged in the rotating inner core 1.

[0045] In one example, the recessed portion 18 is a third through-hole formed on the rotating inner core 1; the protruding portion 19 includes a fourth through-hole 191 formed on the inductor 2, a movable post 192 movably disposed within the fourth through-hole 191, and an elastic member 193 disposed within the fourth through-hole 191 and used to connect the fourth through-hole 191 to the movable post 192, as shown in FIG7 . During operation, when the inductor 2 moves into the second through-hole 15, the movable post 192 moves into the fourth through-hole 191 due to the interference of the wall of the second through-hole 15. At this time, the elastic member 193 is compressed. When the movable post 192 moves to face the fourth through-hole 191, the elastic member 193 pushes the movable post 192 out of the fourth through-hole 191 and into the third through-hole, thereby locking the inductor 2 in the rotating inner core 1. Preferably, the cavity of the third through hole is a trumpet-shaped structure, and the diameter of the end of the third through hole facing the rotating inner core 1 is larger than the diameter of the end of the third through hole facing the outside of the rotating inner core 1. In this way, the side wall of the third through hole can be used to clamp the movable column 192.

[0046] Preferably, the elastic member 193 is a driving spring or a guide assembly, but is not limited to the driving spring or the guide assembly, wherein the guide assembly includes a guide rod, a guide cylinder and a guide spring, the guide rod is movably inserted in the guide cylinder, the guide spring is wound and connected to the outside of the guide rod, and the two ends of the guide spring are respectively fixedly connected to the side wall of the guide rod and the outer wall of the guide cylinder.

[0047] In another example, the recessed portion 18 is a groove, and the protruding portion 19 is a semicircular protrusion, wherein the semicircular protrusion is made of rubber. During operation, when the semicircular protrusion enters the groove, the inductor 2 is limited and locked in the rotating inner core 1.

[0048] Figure 8 is a schematic diagram of the combined structure of the resistance plate, resistance rod and reset spring in the present invention; Referring to Figure 8, the ultrasonic probe also includes two resistance plates 21 respectively arranged on the opposite ends of the inductor 2, and a resistance rod 22 connected to the resistance plate 21, the resistance rod 22 is movably inserted into the resistance hole 23 opened on the inductor 2, and a reset spring 24 is wound around the outside of the resistance rod 22, and the two ends of the reset spring 24 are respectively fixedly connected to the side walls of the resistance rod 22 and the side walls of the resistance hole 23, wherein the resistance hole 23 is connected to the fourth through hole 191, and the resistance rod 22 is matched with the movable column 192. The combined structure of the resistance plate 21, the resistance rod 22 and the return spring 24 is used to firmly lock the movable column 192 in the third through hole, so that the inductor 2 is firmly fixed in the rotating inner core 1 through the movable column 192 and the third through hole, and further after the rotating inner core 1 is heat-shrunk by the sealing part 3, the inductor 2 can be effectively prevented from shaking in the rotating inner core 1.

[0049] It is worth noting that the difference between the second embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1 and the first embodiment is that in the second embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1, the inductor 2 is suspended in the rotating inner core 1. During the installation process, the inductor 2 is first locked in the rotating inner core 1 by the cooperation and limit of the recessed part 18 and the protruding part 19. Then, as the sealing part 3 shrinks due to heat, under the action of the shrinkage resistance force, it will form a resistance to the resistance plate 21 and resist the resistance plate 21 to move closer to the inductor 2. As the resistance plate 21 moves, the resistance rod 22 will move into the fourth through hole 191 and resist the moving column 192 to move out of the fourth through hole 191, so that the moving column 192 moves further into the third through hole, and then the moving column 192 is more firmly fitted with the side wall of the third through hole due to the resistance.

[0050] At the same time, in the second embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1, the first wire 7 is inserted into the left end of the rotating inner core 1 and comes out from the second through hole 15 in the front; the second wire 9 is inserted into the rotating inner core 1 through the first through hole 13 from the right side and comes out from the second through hole 15 in the front; then the first wire 7 and the second wire 9 are respectively connected to the positive and negative poles of the inductor 2, and the inductor 2 is inserted into the rotating inner core 1 from the second through hole 15 in the front.

[0051] Figure 9 is an exploded structural diagram of the third embodiment of the assembly structure of the inductor, the sealing part and the rotating inner core in the present invention; as shown in Figure 9, the difference between the third embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1 and the second embodiment and the first embodiment is that in the third embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1, only one second through hole 15 is opened on the rotating inner core 1, and the second through hole 15 is connected to the first through hole 13. In order to form the second through hole 15, an L-shaped structure is cut on the rotating inner core 1, so that the cavity of the second through hole 15 is determined to be an L-shaped structure. It is worth noting that an L-shaped blocking plate 25 matching the L-shaped structure is connected to the inductor 2. After the inductor 2 is respectively connected to the first wire 7 and the second wire 9, the L-shaped blocking plate 25 will block the second through hole 15 of the L-shaped structure during the installation of the inductor 2 on the rotating inner core 1. In this way, when the inductor 2 is installed on the rotating inner core 1, there is no need to add an external structure, which can prevent the problem of centrifugal weightlessness.

[0052] In one embodiment, the cavity of the second through hole 15 and the L-shaped sealing plate 25 are both trumpet-shaped structures, and the upper end size of the cavity of the second through hole 15 is larger than the lower end size. In this way, when the L-shaped sealing plate 25 blocks the second through hole 15, since the second through hole 15 is in a trumpet-shaped structure, it can support the L-shaped sealing plate 25, thereby limiting and locking the inductor 2 in the rotating inner core 1; then the sealing part 3 is sleeved on the outside of the rotating inner core 1, and the heat shrinkage characteristics of the sealing part 3 are used to fix the L-shaped sealing plate 25 in the second through hole 15.

[0053] It is worth noting that in the third embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1, the inductor 2 is suspended in the rotating inner core 1. During the installation process, the inductor 2 achieves a limit locking effect through the structural cooperation of the L-shaped sealing plate 25 and the second through hole 15, and the L-shaped sealing plate 25 and the second through hole 15 are simple in structure and easy to process and prepare, thereby effectively reducing the processing cost.

[0054] At the same time, in a third embodiment of the assembly structure of the inductor 2, the sealing part 3 and the rotating inner core 1, the first wire 7 is inserted from the left end of the rotating inner core 1 and exits from the second through hole 15 in the front; the second wire 9 does not need to be inserted into the first through hole 13, thereby reducing the difficulty of installing the equipment; then the first wire 7 and the second wire 9 are respectively connected to the positive and negative poles of the inductor 2. After the inductor 2 is connected to the first wire 7 and the second wire 9, the inductor 2 is inserted into the rotating inner core 1 from the second through hole 15 in the front. As the inductor 2 is installed, the second through hole 15 is blocked with the L-shaped blocking plate 25, and before blocking, the second wire 9 will enter the first through hole 13 along the second through hole 15.

[0055] While the embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations of these embodiments are possible. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the claims. Furthermore, the invention described herein is susceptible to other embodiments and may be practiced or implemented in a variety of ways.

Claims

1. An ultrasonic probe, characterized in that: It includes a rotating inner core, an inductor and a sealing part, wherein: The rotating inner core has a first surface and a second surface adjacent to each other, the first surface is provided with a first through hole, the first through hole is communicated with the inner cavity of the rotating inner core, and the second surface is provided with N second through holes, where N is a positive integer; The sealing portion is sleeved outside the rotating inner core and covers the openings of the N second through holes; When the inductor is installed into the rotating inner core through the second through hole, the sealing portion shrinks due to heat to contact the center of gravity of the inductor and is fixed on the central axis of the rotating inner core.

2. The ultrasonic probe according to claim 1, characterized in that: The sealing part is a sealing tube, wherein the sealing tube is made of heat shrinkable material.

3. The ultrasonic probe according to claim 1, characterized in that: It also includes a transducer, an outer tube and a driving flexible shaft, wherein the rotating inner core, the inductor, the sealing part, the transducer and the driving flexible shaft are all arranged in the outer tube; the driving flexible shaft is used for connecting the transducer and the rotating inner core.

4. The ultrasonic probe according to claim 3, characterized in that: It also includes a first wire and a second wire respectively arranged on the positive and negative poles of the inductor, wherein one end of the first wire away from the inductor is electrically connected to the negative pole of the male connector, and one end of the second wire away from the inductor is electrically connected to the positive pole of the transducer.

5. The ultrasonic probe according to claim 1, characterized in that: The N second through holes are divided into a plurality of groups, and the plurality of groups of second through holes are arranged in a ring shape around the central axis of the rotating inner core, wherein the distance between two adjacent second through holes in each group is consistent.

6. The ultrasonic probe according to any one of claims 1 to 5, characterized in that: A step for supporting the inductor is also provided in the rotating inner core, and a fixing block is provided at one end of the inductor away from the step, wherein the weight of the step is consistent with that of the fixing block.

7. The ultrasonic probe according to claim 6, characterized in that: The inductor is fixedly connected to the step, wherein the inductor and the step are fixed by gluing.

8. The ultrasonic probe according to any one of claims 1 to 4, characterized in that: It also includes a recessed portion provided in the rotating inner core, and a protruding portion provided on the inductor, wherein when the inductor is installed into the rotating inner core through the second through hole, the protruding portion enters into the recessed portion.

9. The ultrasonic probe according to claim 8, characterized in that: The recessed portion is a third through hole provided on the rotating inner core; The protruding portion includes a fourth through hole arranged on the inductor, a moving column movably arranged in the fourth through hole, and an elastic member arranged in the fourth through hole and used for connecting the fourth through hole and the moving column.

10. The ultrasonic probe according to claim 9, characterized in that: It also includes two contact plates respectively arranged on the opposite ends of the inductor, and a contact rod connected to the contact plates, the contact rod is movably inserted into a contact hole opened on the inductor, and a reset spring is wound around the outside of the contact rod, and the two ends of the reset spring are respectively fixedly connected to the side wall of the contact rod and the side wall of the contact hole, wherein the contact hole is connected to the fourth through hole, and the contact rod is matched with the movable column.

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