Biopsy needle device

Abstract

The present invention provides a biopsy needle device, which includes two cooperating handles, namely a first handle and a second handle respectively. The second handle can move relative to the first handle along the A direction, and a first positioning member is provided on the first handle, and a second positioning member for contacting the first positioning member is installed on the second handle. A limiting groove is provided on the second handle, and a plurality of adjusting grooves are sequentially and spaced apart along the A direction on the side wall of the limiting groove. The second positioning member includes an adjusting rotating shaft located in the limiting groove and an adjusting convex shaft provided at one end of the adjusting rotating shaft, and the adjusting convex shaft is embedded in one of the adjusting grooves. When using this biopsy needle device, it is more convenient to adjust the needle protruding length, and the positioning ability of the needle protruding length is stronger, avoiding the situation of positioning failure, thereby effectively reducing the risk of surgical failure.

Description

Technical Field

[0001] The present invention relates to a medical device for puncture surgery, and particularly to a biopsy needle device. Background Art

[0002] Endoscopes and their ultrasonic diagnostic devices can detect lesions in organs such as the intestines, stomach, and lungs. Then, a disposable biopsy needle is passed through the working channel of the endoscope to puncture and aspirate the lesion site, remove the diseased tissue from the body, and perform pathological examination and diagnosis. Therefore, biopsy needles are widely used in clinical biopsies.

[0003] The handle of a biopsy needle in the prior art generally adjusts and positions the length of the biopsy needle extending out of the protective sheath tube by means of hand-tightening screws, ensuring that the needle length of the biopsy needle tip can be controlled during repeated punctures. For example, the Chinese utility model patent with the publication number CN211213273U discloses a disposable endoscopic ultrasound aspiration biopsy needle, whose components include a guide wire cap, a guide wire, a biopsy handle, a stop cap, a graduated rod, a hand-tightening screw, a connecting seat, a handle connecting tube, a pipeline, a biopsy needle, a metal sleeve, a guide wire cap seat, and a needle core. The biopsy handle and the biopsy needle are fixedly connected at the top. The biopsy needle passes through the inner hole of the graduated rod. The inner cavity of the biopsy handle can slide freely outside the graduated rod and is limited by stop caps at both ends. It is positioned and locked by the hand-tightening screw at any position to adjust the needle length of the biopsy needle, ensuring that the needle length can be controlled and the position can be fixed during each repeated puncture. Another example is the Chinese utility model patent with the publication number CN 205339010U, which discloses a biopsy needle. The handle of its delivery system includes two length adjustment structures, and these two length adjustment structures are actuated by adjusting two thumb screw locking mechanisms. The threaded proximal thumb screw and the locking ring are movably arranged around the middle handle member. Loosen the proximal thumb screw to loosen the locking ring. The locking ring moves distally along the middle handle member and is fastened at the required position along the middle handle member via the proximal thumb screw, so as to allow the user to achieve a set depth of the needle piercing beyond the end of the sheath. The threaded distal thumb screw is transversely arranged at the distal part of the middle handle member. Loosen the distal thumb screw to move the middle handle member distally and / or proximally and fasten it, so as to allow the user to achieve a set depth of the sheath extending beyond the end of the endoscopic auxiliary channel.

[0004] In the above-mentioned prior art biopsy needle devices, the length of the biopsy needle protruding from the needle is adjusted and positioned by manually screwing the screw. The force used to screw the screw each time may vary, and there may be a situation where the screw cannot be tightened firmly. Or even if it is tightened, this method of using the friction force formed between the top of the screw and the corresponding part to position the corresponding part and then adjust the length of the needle protruding from the needle, during repeated punctures and repeated sliding of the handle during the operation, if the operator uses too much force, the screw may not be well limited, which will all result in the length of the biopsy needle protruding from the needle being too long, increasing the surgical risk or causing the operation to fail. Moreover, using the above-mentioned handle biopsy needle for surgery requires the medical staff to operate with both hands. Especially when adjusting the length of the needle protruding from the needle by manually screwing the screw, both hands are required for operation. The operation is complex and inconvenient to use, which will also affect the surgical efficiency. That is, in the biopsy needle device in the prior art, the positioning ability of the structure used to adjust the length of the needle protruding from the needle is poor, and the situation of positioning failure is likely to occur, resulting in a relatively high risk of surgical failure. Moreover, when adjusting the length of the needle protruding from the needle, the operation is also inconvenient, affecting the work efficiency.

[0005] Therefore, it is necessary to develop a biopsy needle device with a simpler operation, easier adjustment of the length of the needle protruding from the needle, and stronger positioning ability for the length of the needle protruding from the needle. Summary of the Invention

[0006] The purpose of the present invention is to provide a biopsy needle device to solve the problems of complex operation when adjusting the length of the needle protruding from the needle, poor ability to position the length of the needle protruding from the needle, and easy occurrence of positioning failure of the length of the needle protruding from the needle.

[0007] To achieve the above purpose, the present invention provides a biopsy needle device, which includes two cooperating handles, a protective sheath tube connected to one of the handles, and a biopsy needle tube inserted through the protective sheath tube. One end of the biopsy needle tube is connected to the other handle, and a biopsy needle tip is provided at the other end of the biopsy needle tube. The two handles are respectively a first handle and a second handle. The second handle can move relative to the first handle along the A direction. A first positioning member is provided on the first handle, and a second positioning member for contacting the first positioning member is installed on the second handle. A limiting groove is provided on the second handle, and a plurality of adjusting grooves are provided on the side wall of the limiting groove and are sequentially spaced apart along the A direction. The second positioning member includes an adjusting rotating shaft located in the limiting groove and an adjusting convex shaft provided at one end of the adjusting rotating shaft. The adjusting convex shaft is embedded in one of the adjusting grooves.

[0008] As described above, the biopsy needle device involved in the present invention has the following beneficial effects:

[0009] When the biopsy needle device is in use, a person's hand acts on the two handles and causes the second handle to move relative to the first handle in direction A, so that the biopsy needle tube moves relative to the protective sheath, and the biopsy needle extends from the protective sheath and pierces the corresponding tissue to achieve the puncture action. During this process, the first positioning member contacts the second positioning member to limit the movement amplitude of the second handle relative to the first handle, thereby limiting the length of the biopsy needle extending out of the protective sheath. At the same time, the side wall of the limiting groove of the second handle is provided with a plurality of adjustment grooves spaced in sequence along direction A. When it is necessary to adjust the needle withdrawal length, a person's hand acts on the second handle, and one of the fingers moves the adjustment cam to rotate the adjustment cam and the adjustment shaft to achieve the withdrawal of the adjustment cam from the corresponding adjustment groove, and continues to move the adjustment cam along direction A to drive the adjustment cam and the adjustment shaft to move in the limiting groove along direction A until the adjustment cam corresponds to another corresponding adjustment groove, and moves the adjustment cam to drive the adjustment cam and the adjustment shaft to rotate, and causes the adjustment cam to be embedded in the other adjustment groove, so as to achieve the adjustment cam and different adjustment grooves. The adjusting groove cooperates with each other, and the cooperation relationship between the adjusting groove and the adjusting convex shaft will limit the position of the second positioning member on the second handle, thereby realizing the adjustment of the position of the second positioning member on the second handle along the A direction. In this way, during the puncture process, when the second positioning member whose position has been readjusted contacts the first positioning member again, the movement amplitude of the second handle relative to the first handle along the A direction also changes accordingly, thereby also causing the length of the biopsy needle extending out of the protective sheath to change accordingly, thereby realizing the adjustment of the length of the biopsy needle extending out of the protective sheath. Moreover, this adjustment method is very simple to operate, facilitates the puncture operation, and improves the puncture operation efficiency. Moreover, compared with the limiting of the limited member by the friction force formed by tightening the screw against the limited member, that is, realizing the limiting of the limited member, the present biopsy needle device uses the cooperation of the adjusting groove and the adjusting convex shaft to locate the position of the second positioning member on the second handle, which can effectively improve the positioning capability of the needle outlet length, effectively avoid the situation of positioning failure, thereby improving the stability and accuracy of the puncture operation, and effectively reducing the risk of failure of the puncture operation.

[0010] Preferably, the second handle includes a handle main shaft, and a handle assembly hole is provided in the first handle. The handle main shaft is matched with the handle assembly hole, that is, the matching form between the second handle and the first handle is a shaft-hole matching form. During the movement of the second handle relative to the first handle, this shaft-hole matching form can guide the second handle to move accurately along a set direction relative to the first handle; and a limiting groove is provided on the handle main shaft, and the other end of the adjusting rotating shaft is embedded in the inner end of the limiting groove. The inner end of the limiting groove is located in the handle assembly hole, that is, the corresponding end of the adjusting rotating shaft without the adjusting convex shaft is embedded in the inner end of the limiting groove. At the same time, the inner end of this limiting groove extends into the handle assembly hole. In this way, the side wall of the handle assembly hole will also restrict the other end of the adjusting rotating shaft. Combining the restricting effect of the limiting groove on the adjusting rotating shaft, it can effectively prevent the adjusting rotating shaft from disengaging from the limiting groove and enable the adjusting rotating shaft to only rotate in the limiting groove or move along the set direction A in the limiting groove.

[0011] Preferably, a limiting ring is installed on the side wall of the handle assembly hole, and the limiting ring is sleeved on the handle main shaft. A main shaft protrusion is provided on the handle main shaft. The limiting ring is used to contact the main shaft protrusion, and the limiting ring is used to restrict the handle main shaft from exiting the handle assembly hole to ensure that the second handle can maintain a set matching relationship with the first handle and prevent the second handle from disengaging from the first handle.

[0012] Preferably, the limiting ring is made of an elastic material, so that the limiting ring has a certain elastic deformation ability; the inner diameter of the limiting ring is smaller than the outer diameter of the handle main shaft, so that the limiting ring and the handle main shaft form an interference fit. And the limiting ring has a certain elastic deformation ability, so that the limiting ring will not be completely fixed on the handle main shaft. The handle main shaft can still move relative to the limiting ring under a certain external force, and the limiting ring will produce a certain damping effect on the movement of the handle main shaft. This damping effect can effectively prevent the relative movement speed of the two handles from being too fast, facilitate the human hand to control the relative movement speed of the two handles, and further facilitate the human hand to control the puncture speed and improve the operation accuracy.

[0013] Preferably, a hole wall boss is provided on the side wall of the handle assembly hole, and a fixing member is installed at the end of the handle assembly hole. A limiting ring installation groove is formed between the fixing member and the hole wall boss, and the limiting ring is embedded in the limiting ring installation groove to realize the installation of the limiting ring on the side wall of the handle assembly hole. And this form of installing the limiting ring on the side wall of the handle assembly hole is relatively simple and can effectively prevent the limiting ring from falling off the side wall of the handle assembly hole.

[0014] Preferably, the fixing member includes a fixing ring, a fixing segment fixedly connected to the fixing ring, and a clamping pin fixedly connected to the fixing ring. One end of the clamping pin is fixedly connected to the fixing ring, and a clamping protrusion is provided at the other end of the clamping pin. A clamping hole communicating with the handle assembly hole is provided on the first handle. The clamping pin and the fixing segment are located in the handle assembly hole, and the clamping protrusion is embedded in the clamping hole. The limiting ring mounting groove is formed between the fixing segment and the hole wall boss. During the assembly process, the fixing segment and the clamping pin of the fixing member are inserted into the handle assembly hole until the clamping protrusion moves to correspond to the clamping hole. The clamping protrusion will be embedded in the clamping hole, and the fixing segment and the clamping pin interact with the side wall of the handle assembly hole. Combining with the cooperation relationship between the clamping protrusion and the clamping hole, the fixing member is fixedly installed on the side wall of the handle assembly hole, and the operation is very simple, facilitating the assembly work. In addition, when needed, by withdrawing the clamping protrusion from the clamping hole, the clamping pin and the fixing segment can be withdrawn from the handle assembly hole, so as to disassemble the fixing member from the side wall of the handle assembly hole, that is, the above installation structure can also realize the detachable connection between the fixing member and the first handle, facilitating the removal of the fixing member when needed, and further facilitating the replacement of the limiting ring, etc.

[0015] Preferably, a plurality of the hole wall bosses are provided on the side wall of the handle assembly hole and are sequentially and spaced apart along the circumferential direction of the handle assembly hole. A chute is formed between two adjacent hole wall bosses, and the main shaft protrusion is embedded in the chute. When the second handle moves relative to the first handle, the handle main shaft moves in the handle assembly hole, and at the same time the main shaft protrusion slides along the chute, which can not only guide the handle main shaft and the second handle to move accurately along the set direction relative to the first handle, but also effectively limit the rotation of the handle main shaft and the second handle relative to the first handle, improving the stability and accuracy of the puncture operation.

[0016] Preferably, a first positioning portion is provided on the first positioning member, and a second positioning portion is provided on the second positioning member; the second positioning portion is used to contact the first positioning portion to limit the movement of the second handle relative to the first handle; and the end of the adjusting convex shaft constitutes the second positioning portion. During the relative movement of the two handles, the end of the adjusting convex shaft will contact the first positioning portion of the first positioning member to limit the relative movement amplitude of the two handles. In this way, the adjusting convex shaft not only realizes the adjustment of the position of the second positioning member on the second handle by cooperating with different adjusting grooves, but also the end of the adjusting convex shaft can serve as the second positioning portion. One component has multiple functions, simplifying the overall structure of the biopsy needle device and reducing the cost.

[0017] Preferably, the first handle is connected to the protective sheath tube, and the second handle is connected to one end of the biopsy needle tube. When the second handle moves relative to the first handle, the second handle will drive the biopsy needle tube to move relative to the protective sheath tube, so that the biopsy needle tube extends out of the protective sheath tube or retracts into the protective sheath tube.

[0018] Preferably, finger holes are provided on the first handle and / or the second handle. During the puncture operation, fingers are inserted into the finger holes, which facilitates applying corresponding forces to the handles by the fingers and makes it easy to operate the corresponding handles to perform corresponding actions. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the biopsy needle device in an embodiment of the present invention;

[0020] Figure 2 is a schematic cross-sectional view of the biopsy needle device in an embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of the first handle in an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of the second handle in an embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of the first positioning member in an embodiment of the present invention;

[0024] Figure 6 is a schematic structural diagram of the second positioning member in an embodiment of the present invention.

[0025] Explanation of Element Numbers:

[0026] 1 Protective sheath tube 43 Handle bump

[0027] 2 Biopsy needle tube 5 First positioning member

[0028] 3 First handle 51 Fixing member

[0029] 31 Handle assembly hole 511 Fixing ring

[0030] 311 Hole wall boss 5111 Avoidance groove

[0031] 312 Slide groove 512 Fixing tube piece

[0032] 32 Clamping hole 513 Clamping pin

[0033] 33 Finger hole 514 Clamping projection

[0034] 4 Second handle 5141 Clamping guide slope

[0035] 41 Handle spindle 6 Second positioning member

[0036] 411 Limit groove 61 Adjusting rotating shaft

[0037] 4111 Adjusting groove 62 Adjusting convex shaft

[0038] 412 Spindle protrusion 7 Limit ring

[0039] 42 Handle through-hole Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art in the field to which the present invention belongs. The words such as "including" used herein mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0041] As Figure 1 and Figure 2 shown, this embodiment provides a biopsy needle device, including two cooperating handles, a protection sheath tube 1 connected to one of the handles, and a biopsy needle tube 2 inserted in the protection sheath tube 1. One end of the biopsy needle tube 2 is connected to the other handle, and a biopsy needle tip is provided at the other end of the biopsy needle tube 2. The two handles are respectively a first handle 3 and a second handle 4. The second handle 4 can move relative to the first handle 3 along the A direction, and a first positioning member 5 is provided on the first handle 3, and a second positioning member 6 for contacting the first positioning member 5 is installed on the second handle 4; As Figure 4 shown, a limit groove 411 is provided on the second handle 4, and a plurality of adjusting grooves 4111 are provided on the side wall of the limit groove 411 and are sequentially and spaced apart along the A direction; As Figure 6 shown, the second positioning member 6 includes an adjusting rotating shaft 61 located in the limit groove 411 and an adjusting convex shaft 62 provided at one end of the adjusting rotating shaft 61. The adjusting convex shaft 62 is embedded in one of the adjusting grooves 4111.

[0042] When the biopsy needle device is in use, a person acts on the two handles by hand and causes the second handle 4 to move relative to the first handle 3 in the direction A, so that the biopsy needle tube 2 moves relative to the protective sheath 1, and the biopsy needle extends from the protective sheath 1 and pierces the corresponding tissue to achieve a puncture action. During this process, the first positioning member 5 contacts the second positioning member 6 to limit the movement of the second handle 4 relative to the first handle 3, thereby limiting the length of the biopsy needle extending from the protective sheath 1; at the same time, the side wall of the limiting groove 411 of the second handle 4 is provided with a plurality of adjustment slots spaced in sequence along the direction A. The adjusting cam 62 is a plurality of adjusting grooves 4111, and the adjusting cam 62 is a plurality of adjusting grooves 4111. When necessary, a person acts on the second handle 4, and one of the fingers moves the adjusting cam 62 to rotate the adjusting cam 62 and the adjusting shaft 61, so that the adjusting cam 62 withdraws from the corresponding adjusting groove 4111, and continues to move the adjusting cam 62 along the A direction to drive the adjusting cam 62 and the adjusting shaft 61 to move along the A direction in the limiting groove 411 until the adjusting cam 62 corresponds to another corresponding adjusting groove 4111, and moves the adjusting cam 62 to drive the adjusting cam 62 and the adjusting shaft 61 to rotate, and the adjusting cam 62 is embedded in the other adjusting groove 4111. In the adjusting groove 4111, the adjusting convex shaft 62 is matched with different adjusting grooves 4111. The matching relationship between the adjusting groove 4111 and the adjusting convex shaft 62 will limit the position of the second positioning member 6 on the second handle 4, thereby realizing the adjustment of the position of the second positioning member 6 on the second handle 4 along the A direction. In this way, during the puncture process, when the second positioning member 6 whose position has been readjusted contacts the first positioning member 5 again, the movement amplitude of the second handle 4 relative to the first handle 3 along the A direction also changes accordingly, thereby causing the length of the biopsy needle protruding from the protective sheath 1 to change accordingly. The corresponding changes are made, and the adjustment of the length of the biopsy needle extending out of the protective sheath 1 is realized. In addition, this adjustment method is very simple to operate, which facilitates the puncture operation and improves the efficiency of the puncture operation. Compared with the limitation of the limited member by the friction force formed by the tightened screw against the limited member, the biopsy needle device uses the cooperation of the adjustment groove 4111 and the adjustment convex shaft 62 to limit the position of the second positioning member 6 on the second handle 4, which can effectively improve the corresponding limiting ability, effectively avoid the situation of limiting failure, and thus improve the stability and accuracy of the puncture operation.

[0043] In this embodiment, the A direction refers to the direction in which the second handle 4 moves relative to the first handle 3 during the puncture operation; all the adjustment grooves 4111 provided on the side wall of the limit groove 411 are also sequentially and spaced apart along the A direction, that is, the distribution direction of all the adjustment grooves 4111 on the side wall of the limit groove 411 is the same as the direction in which the second handle 4 moves relative to the first handle 3. In this way, when the adjustment convex shaft 62 cooperates with different adjustment grooves 4111, the movement amplitude of the second handle 4 relative to the first handle 3 in the original set movement direction can be adjusted. In this embodiment, the A direction can specifically refer to the left-right direction. When the second handle 4 moves relative to the first handle 3 in the left-right direction, the puncture operation is realized.

[0044] As Figure 2 shown, in this embodiment, the left end of the first handle 3 is connected to the protection sheath 1, and the left end of the second handle 4 is connected to one end of the biopsy needle tube 2. When the second handle 4 moves relative to the first handle 3, the second handle 4 will drive the biopsy needle tube 2 to move relative to the protection sheath 1, so that the biopsy needle tip extends out of the protection sheath 1 or the biopsy needle tip retracts into the protection sheath 1. In this embodiment, the diameter of the biopsy needle tube 2 is slightly smaller than the diameter of the protection sheath 1. In this way, when the second handle 4 moves relative to the first handle 3 in the left-right direction, the biopsy needle tube 2 can slide within the protection sheath 1. In another embodiment, the first handle 3 can be connected to one end of the biopsy needle tube 2, and the second handle 4 can be connected to the protection sheath 1; in this another embodiment, when the first handle 3 moves relative to the second handle 4, the first handle 3 will drive the biopsy needle tube 2 to move relative to the protection sheath 1, so that the biopsy needle tip extends out of the protection sheath 1 or the biopsy needle tip retracts into the protection sheath 1.

[0045] As Figure 2As shown, in this embodiment, the second handle 4 includes a handle main shaft 41. There is a handle assembly hole 31 in the first handle 3. The handle main shaft 41 is matched with the handle assembly hole 31. That is, the matching form between the second handle 4 and the first handle 3 is a shaft-hole matching form. During the movement of the second handle 4 relative to the first handle 3, this shaft-hole matching form can guide the second handle 4 to slide accurately along the set direction relative to the first handle 3. And a limiting groove 411 is provided on the handle main shaft 41. The other end of the adjusting rotating shaft 61 is embedded in the inner end of the limiting groove 411. The inner end of the limiting groove 411 is located in the handle assembly hole 31. That is, the corresponding end of the adjusting rotating shaft 61 without the adjusting convex shaft 62 is embedded in the inner end of the limiting groove 411. At the same time, the inner end of this limiting groove 411 extends into the handle assembly hole 31. In this way, the side wall of the handle assembly hole 31 also plays a limiting role on the other end of the adjusting rotating shaft 61. Combining the limiting effect of the limiting groove 411 on the adjusting rotating shaft 61, it can effectively prevent the adjusting rotating shaft 61 from disengaging from the limiting groove 411 and enable the adjusting rotating shaft 61 to only rotate in the limiting groove 411 or move along the set direction A in the limiting groove 411. The inner end of the limiting groove 411 can be understood as the corresponding end of the limiting groove 411 located in the handle assembly hole 31. In this embodiment, the left end of the limiting groove 411 is located in the handle assembly hole 31. That is, the left end of the limiting groove 411 in this embodiment is the inner end of the limiting groove 411.

[0046] As Figure 2 and Figure 4As shown in the figure, in this embodiment, a limit ring 7 is installed on the side wall of the handle assembly hole 31, and the limit ring 7 is sleeved on the handle main shaft 41. There is a main shaft protrusion 412 on the handle main shaft 41. The limit ring 7 is used to contact the main shaft protrusion 412. The limit ring 7 is used to prevent the handle main shaft 41 from withdrawing from the handle assembly hole 31, so as to ensure that the second handle 4 can maintain a set matching relationship with the first handle 3 and prevent the second handle 4 from disengaging from the first handle 3. Specifically, in this embodiment, there are two main shaft protrusions 412 at the left end of the handle main shaft 41. At the same time, in this embodiment, the limit ring 7 is made of an elastic material, so that the limit ring 7 has a certain elastic deformation ability; the inner diameter of the limit ring 7 is smaller than the outer diameter of the handle main shaft 41, so that the limit ring 7 and the handle main shaft 41 form an interference fit. Since the limit ring 7 has a certain elastic deformation ability, the limit ring 7 will not be completely fixed on the handle main shaft 41. The handle main shaft 41 can still move relative to the limit ring 7 under a certain external force, and the limit ring 7 will produce a certain damping effect on the movement of the handle main shaft 41. This damping effect can effectively prevent the relative movement speed of the two handles from being too fast, which is convenient for the human hand to control the relative movement speed of the two handles, and further convenient for the human hand to control the puncture speed and improve the operation accuracy. In this way, in this embodiment, the limit ring 7 acts on the main shaft protrusion 412 to limit the second handle 4 from disengaging from the first handle 3; at the same time, the limit ring 7 can also play a damping role on the handle main shaft 41 to improve the feel during the puncture operation, thereby improving the puncture operation accuracy. In this embodiment, the material of the limit ring 7 can specifically be rubber, which not only ensures that the limit ring 7 has good elasticity but also ensures that the limit ring 7 has high strength. In addition, in this embodiment, the limit ring 7 can effectively seal the gap between the handle main shaft 41 and the side wall of the handle assembly hole 31. The limit ring 7 also plays a sealing role and can effectively prevent external harmful substances from entering the protection sheath 1 through the handle assembly hole 31.

[0047] As Figure 2 shown, in this embodiment, a hole wall boss 311 is provided on the side wall of the handle assembly hole 31, and a fixing member 51 is installed at the end of the handle assembly hole 31. A limit ring installation groove is formed between the fixing member 51 and the hole wall boss 311, and the limit ring 7 is embedded in the limit ring installation groove to install the limit ring 7 on the side wall of the handle assembly hole 31. And this form of installing the limit ring 7 on the side wall of the handle assembly hole 31 is relatively simple and can effectively prevent the limit ring 7 from falling off the side wall of the handle assembly hole 31. As Figure 3 and Figure 4As shown in the figure, in this embodiment, a plurality of hole wall bosses 311 are provided on the side wall of the handle assembly hole 31, which are spaced apart along the circumferential direction of the handle assembly hole 31. A chute 312 is formed between two adjacent hole wall bosses 311, and the spindle protrusion 412 on the handle spindle 41 is embedded in the chute 312. When the second handle 4 moves relative to the first handle 3, the handle spindle 41 slides in the handle assembly hole 31, and at the same time, the spindle protrusion 412 slides along the chute 312. This can not only guide the handle spindle 41 and the second handle 4 to move accurately along the set direction relative to the first handle 3, but also effectively limit the rotation of the handle spindle 41 and the second handle 4 relative to the first handle 3, improving the stability and accuracy of the puncture operation. Specifically, two hole wall bosses 311 are provided on the side wall of the handle assembly hole 31, and two chutes 312 are formed between the two hole wall bosses 311. The two spindle protrusions 412 of the handle spindle 41 are respectively embedded in the two chutes 312. In this embodiment, the handle assembly hole 31 is a circular hole, the handle spindle 41 is generally cylindrical, and the two spindle protrusions 412 provided at the left end of the handle spindle 41 are symmetrically distributed. Correspondingly, the two chutes 312 on the side wall of the handle assembly hole 31 are also symmetrically distributed, and the two spindle protrusions 412 are respectively embedded in the two chutes 312.

[0048] As Figure 5 shown, in this embodiment, the fixing member 51 includes a fixing ring 511, a fixing tube piece 512 fixedly connected to the fixing ring 511, and a clamping pin 513 fixedly connected to the fixing ring 511. One end of the clamping pin 513 is fixedly connected to the fixing ring 511, and a clamping protrusion 514 is provided at the other end of the clamping pin 513; As Figure 3 shown, a clamping hole 32 communicating with the handle assembly hole 31 is provided on the first handle 3, that is, the clamping hole 32 is provided on the side wall of the handle assembly hole 31; As Figure 1 and Figure 2As shown, the clamping pin 513 and the fixing piece 512 are located in the handle assembly hole 31, and the clamping protrusion 514 is embedded in the clamping hole 32. A limiting ring installation groove is formed between the fixing piece 512 and the hole wall boss 311. During the assembly process, the fixing piece 512 and the clamping pin 513 of the fixing member 51 are inserted into the handle assembly hole 31 until the clamping protrusion 514 moves to a position corresponding to the clamping hole 32. The clamping protrusion 514 will be embedded in the clamping hole 32. The fixing piece 512 and the clamping pin 513 interact with the side wall of the handle assembly hole 31. Combining with the cooperation relationship between the clamping protrusion 514 and the clamping hole 32, the fixing member 51 is fixedly installed on the side wall of the handle assembly hole 31, and the operation is very simple, which facilitates the assembly work. In addition, when needed, by withdrawing the clamping protrusion 514 from the clamping hole 32, the clamping pin 513 and the fixing piece 512 can be pulled out from the handle assembly hole 31, so as to disassemble the fixing member 51 from the side wall of the handle assembly hole 31. That is, the above installation structure can also realize the detachable connection between the fixing member 51 and the first handle 3, which is convenient to remove the fixing member 51 when needed, and then facilitate the replacement of the limiting ring 7 and the like. At the same time, in this embodiment, the fixing member 51 includes two fixing pieces 512 and two clamping pins 513. The two fixing pieces 512 are spaced along the circumferential direction of the fixing ring 511. Two symmetrically distributed pin gaps are formed between the two fixing pieces 512. The two clamping pins 513 are respectively located in the two pin gaps, and two symmetrically distributed clamping holes 32 are provided on the side wall of the handle assembly hole 31. The clamping protrusions 514 on the two clamping pins 513 are respectively embedded in the two clamping holes 32. During the assembly process, the clamping pin 513 and the fixing piece 512 extend into the handle assembly hole 31. The clamping protrusion 514 abuts against the side wall of the handle assembly hole 31. A certain elastic deformation will occur at the fixed connection between the clamping pin 513 and the fixing ring 511 to ensure that the clamping pin 513 and the fixing piece 512 can smoothly enter the set position in the handle assembly hole 31. When the two clamping protrusions 514 respectively move to correspond to the two clamping holes 32, based on the resilience formed at the connection between the clamping pin 513 and the fixing ring 511, the two clamping protrusions 514 are respectively embedded in the two clamping holes 32 to realize the fixed installation of the fixing member 51 on the first handle 3. In this embodiment, the fixing member 51 can be integrally formed by an injection molding process. In this embodiment, the outer diameter of the fixing ring 511 is larger than the aperture of the handle assembly hole 31, and the end of the fixing ring 511 abuts against the side wall of the handle assembly hole 31. In this embodiment, the clamping hole 32 is specifically a square hole. And in this embodiment, a clamping guiding inclined surface 5141 is provided at one end of the clamping protrusion 514 facing away from the fixing ring 511. During the process of inserting the clamping protrusion 514 and the clamping pin 513 into the handle assembly hole 31, the clamping guiding inclined surface 5141 abuts against the side wall of the handle assembly hole 31 to facilitate the entry of the clamping protrusion 514 and the clamping pin 513 into the handle assembly hole 31.In this embodiment, the snap protrusion 514 and the snap pin 513 form a snap structure.

[0049] In this embodiment, the first positioning member 5 is provided with a first positioning portion, and the second positioning member 6 is provided with a second positioning portion; the second positioning portion is used to contact the first positioning portion to limit the movement of the second handle 4 relative to the first handle 3; and the end of the adjusting convex shaft 62 constitutes the second positioning portion. During the relative movement of the two handles, the end of the adjusting convex shaft 62 will contact the first positioning portion of the first positioning member 5 to limit the relative movement amplitude of the two handles. In this way, the adjusting convex shaft 62 not only realizes the adjustment of the position of the second positioning member 6 on the second handle 4 by cooperating with different adjusting grooves 4111, but also the end of the adjusting convex shaft 62 can be used as the second positioning portion. One component has multiple functions, which simplifies the overall structure of the biopsy needle device and reduces the cost. At the same time, in this embodiment, the fixing member 51 constitutes the first positioning member 5, and the end face of the fixing ring 511 constitutes the first positioning portion. That is, during the relative movement of the two handles, the second positioning member 6 contacts the end face of the fixing ring 511 to limit the relative movement amplitude of the two handles. The fixing member 51 is not only used to install the limiting ring 7, but also used as the first positioning member 5, which simplifies the overall structure of the biopsy needle device and reduces the cost. Specifically, as Figure 1 and Figure 2 shown, during the puncture operation, the end of the adjusting convex shaft 62 abuts against the end face of the fixing ring 511 to limit the movement amplitude of the second handle 4 relative to the first handle 3, and further limit the needle-out length of the biopsy needle head relative to the protection sheath 1.

[0050] In this embodiment, the cross-section of the side wall surface of the limiting groove 411 is arc-shaped, the adjusting rotating shaft 61 is a cylindrical shaft, and the adjusting rotating shaft 61 is placed in the limiting groove 411 to ensure that when the adjusting convex shaft 62 is toggled, the adjusting rotating shaft 61 can be smoothly driven to rotate in the limiting groove 411. And all the adjusting grooves 4111 are equidistantly distributed in the left-right direction. According to the surgical needs, the distance between the adjusting grooves 4111 is generally set to 5 mm. In this embodiment, the width of the adjusting convex shaft 62 is slightly larger than the width of the adjusting groove 4111, which can not only make the adjusting convex shaft 62 snap into the adjusting groove 4111, but also have a small interference amount, so that the adjusting convex shaft 62 is not easily slipped out of the adjusting groove 4111, thereby realizing more effective limiting. In this embodiment, the materials of the second positioning member 6 and the second handle 4 can be plastics, which not only ensure that both have the required strength, but also ensure that both have a certain elastic deformation ability, so as to ensure that the adjusting convex shaft 62 can be smoothly embedded in the adjusting groove 4111. When the protection sheath 1 and the biopsy needle pass through the endoscopic channel, the adjusting convex shaft 62 is placed in the leftmost adjusting groove 4111. During this process, even if the second handle 4 is slid to the left to make the left side surface of the adjusting convex shaft 62 contact the fixing member 51, the protection sheath 1 is flush with the biopsy needle on the left end of the biopsy needle tube 2, or slightly longer than the biopsy needle, so as to ensure that when the protection sheath 1 and the biopsy needle pass through the endoscopic channel, the biopsy needle does not puncture the channel. During the puncture operation, according to the needs, the adjusting convex shaft 62 is placed in the corresponding adjusting groove 4111, and then the second handle 4 is slid to make the left side surface of the adjusting convex shaft 62 contact the fixing member 51. At this time, the biopsy needle at the end of the biopsy needle tube 2 extends out of the protection sheath 1 by a corresponding distance. By sliding the second handle 4 repeatedly in this way, repeated punctures can be realized to obtain the target tissue, and then biopsy can be carried out.

[0051] As Figure 1 shown, in this embodiment, finger holes 33 are provided on both the first handle 3 and the second handle 4. During the puncture operation, the fingers are inserted into the finger holes 33, which is convenient for the fingers to apply corresponding forces to the handles, and is convenient for operating the corresponding handles to perform corresponding actions. At the same time, in this embodiment, two finger holes 33 are provided on the first handle 3 and are sequentially spaced apart in the up-down direction. The two finger holes 33 on the first handle 3 are symmetrically distributed, and one finger hole 33 is provided on the second handle 4. During the puncture operation, the index finger and middle finger of the operator are respectively inserted into the two finger holes 33 on the first handle 3, and the thumb of the operator is inserted into the finger hole 33 on the second handle 4. By toggling the thumb, the second handle 4 can be driven to axially slide relative to the first handle 3, so that the operator can facilitate single-handed operation. In other embodiments, according to the needs, finger holes 33 can be provided only on the first handle 3 or the second handle 4.

[0052] As Figure 5As shown, in this embodiment, two symmetrically distributed avoidance grooves 5111 are provided on the inner wall of the fixed ring 511. During the assembly process, the left end of the handle main shaft 41 passes through the fixed ring 511 and the limit ring 7 in sequence, and then is inserted into the handle assembly hole 31. During the process that the left end of the handle main shaft 41 passes through the fixed ring 511, the main shaft protrusions 412 on the handle main shaft 41 respectively correspond to the two avoidance grooves 5111 to ensure that the handle main shaft 41 can pass through the fixed ring 511 smoothly.

[0053] In this embodiment, the first handle 3, the second handle 4, the first positioning member 5 and the second positioning member 6 can all be made of plastic. As Figure 2 shown, a handle through hole 42 communicating with the biopsy needle tube 2 is further provided in the second handle 4, and aspiration operation can be performed through the handle through hole 42. And a handle convex block 43 is further provided on the second handle 4. During the puncture process, if the adjusting convex shaft 62 fails to abut against the fixed ring 511 as required to limit the movement of the second handle 4 relative to the first handle 3, the handle convex block 43 will abut against the fixed ring 511, that is, the first positioning member 5, to limit the maximum movement amplitude of the second handle 4 relative to the first handle 3.

[0054] In this embodiment, the biopsy needle device, based on the above structural design, solves the problem of limiting the needle-out length of the biopsy needle head; and based on the cooperation form of the adjusting convex shaft 62 and the adjusting groove 4111, the needle-out length of the biopsy needle head is limited, which can effectively prevent the random change of the needle-out length of the biopsy needle head, that is, this limiting form is safer and more reliable. In addition, single-handed operation can be realized during the puncture operation. During the process of adjusting the needle-out length of the biopsy needle head, when a single hand acts on the second handle 4 or the first handle 3, a finger of this hand toggles the adjusting convex shaft 62, and the adjusting convex shaft 62 can be withdrawn from the corresponding adjusting groove 4111 and embedded into another adjusting groove 4111, so as to realize the adjustment of the needle-out length of the biopsy needle head, which facilitates the operation and improves the efficiency of the puncture operation.

[0055] Although the embodiments of the present invention have been described in detail above, it is obvious to those skilled in the art that various modifications and changes can be made to these embodiments. However, it should be understood that such modifications and changes are all within the scope and spirit of the present invention described in the claims. Moreover, the present invention described herein can have other embodiments, and can be implemented or realized in various ways.

Claims

1. A biopsy needle device, characterized in that, It includes two cooperating handles, a protective sheath tube (1) connected to one of the handles, and a biopsy needle tube (2) inserted in the protective sheath tube (1). One end of the biopsy needle tube (2) is connected to the other handle, and a biopsy needle tip is provided at the other end of the biopsy needle tube (2). The two handles are respectively a first handle (3) and a second handle (4). The second handle (4) can move relative to the first handle (3) along the A direction. A first positioning member (5) is provided on the first handle (3), and a second positioning member (6) for contacting the first positioning member (5) is installed on the second handle (4). A limiting groove (411) is provided on the second handle (4), and a plurality of adjusting grooves (4111) are provided on the side wall of the limiting groove (411) and are sequentially spaced along the A direction. The second positioning member (6) includes an adjusting rotating shaft (61) located in the limiting groove (411) and an adjusting convex shaft (62) provided at one end of the adjusting rotating shaft (61). The adjusting convex shaft (62) is embedded in one of the adjusting grooves (4111). The second handle (4) includes a handle main shaft (41), and a handle assembly hole (31) is provided in the first handle (3). The handle main shaft (41) is matched with the handle assembly hole (31). A hole wall boss (311) is provided on the side wall of the handle assembly hole (31), and a fixing member (51) is installed at the end of the handle assembly hole (31). The fixing member (51) includes a fixing ring (511), a fixing pipe piece (512) fixedly connected to the fixing ring (511), and a clamping pin (513) fixedly connected to the fixing ring (511). One end of the clamping pin (513) is fixedly connected to the fixing ring (511), and a clamping protrusion (514) is provided at the other end of the clamping pin (513). A clamping hole (32) communicating with the handle assembly hole (31) is provided on the first handle (3). The clamping pin (513) and the fixing pipe piece (512) are located in the handle assembly hole (31), and the clamping protrusion (514) is embedded in the clamping hole (32). A limiting ring installation groove is formed between the fixing pipe piece (512) and the hole wall boss (311).

2. The biopsy needle device according to claim 1, wherein The limiting groove (411) is provided on the handle main shaft (41), and the other end of the adjusting rotating shaft (61) is embedded in the inner end of the limiting groove (411). The inner end of the limiting groove (411) is located in the handle assembly hole (31).

3. The biopsy needle device according to claim 2, wherein A limiting ring (7) is installed on the side wall of the handle assembly hole (31), and the limiting ring (7) is sleeved on the handle main shaft (41). A main shaft protrusion (412) is provided on the handle main shaft (41). The limiting ring (7) is used for contacting the main shaft protrusion (412), and the limiting ring (7) is used for restricting the handle main shaft (41) from withdrawing from the handle assembly hole (31).

4. The biopsy needle device according to claim 3, wherein, The limiting ring (7) is made of an elastic material, and the inner diameter of the limiting ring (7) is smaller than the outer diameter of the handle main shaft (41).

5. The biopsy needle device according to claim 3, wherein A limiting ring installation groove is formed between the fixing member (51) and the hole wall boss (311), and the limiting ring (7) is embedded in the limiting ring installation groove.

6. The biopsy needle device according to claim 5, wherein A plurality of hole wall bosses (311) are provided on the side wall of the handle assembly hole (31) and are sequentially and spaced apart along the circumferential direction of the handle assembly hole (31). A chute (312) is formed between adjacent two hole wall bosses (311), and the main shaft protrusion (412) is embedded in the chute (312).

7. The biopsy needle device according to claim 1, wherein, The first positioning member (5) is provided with a first positioning portion, and the second positioning member (6) is provided with a second positioning portion; the second positioning portion is used to contact the first positioning portion to limit the movement of the second handle (4) relative to the first handle (3); and the end of the adjusting convex shaft (62) constitutes the second positioning portion.

8. The biopsy needle device according to claim 1, wherein, The first handle (3) is connected to the protective sheath tube (1), and the second handle (4) is connected to one end of the biopsy needle tube (2).

9. The biopsy needle device according to claim 1, wherein Finger holes (33) are provided on the first handle (3) or / and the second handle (4).

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