Interventional ultrasonic puncture auxiliary guiding device

Abstract

The invention discloses an interventional ultrasonic puncture auxiliary guiding device, and relates to the technical field of medical puncture, the interventional ultrasonic puncture auxiliary guiding device comprises a hollow shell with one side open, one side of the shell is provided with an ultrasonic probe and a puncture needle, and one side of the shell is provided with a moving mechanism used for driving the ultrasonic probe to move; the device comprises a shell, a moving mechanism is arranged in the shell, an angle adjusting mechanism used for adjusting the direction of a needle head of a puncture needle is arranged on one side of the shell, a fixing mechanism used for fixing the puncture needle is arranged in the angle adjusting mechanism, the moving mechanism comprises a first motor, and the first motor is fixedly connected to one side of the shell. The ultrasonic probe is driven to move left and right by controlling the first electric telescopic rod, the ultrasonic probe is driven to move front and back by controlling the first electric telescopic rod, and the ultrasonic probe is driven to move up and down by controlling the second electric telescopic rod, so that the ultrasonic probe can move in all directions, and is more convenient to use when a patient with a larger disease area is treated.

Description

Technical Field

[0001] The invention relates to the technical field of medical puncture, in particular to an interventional ultrasonic puncture auxiliary guide. Background Art

[0002] The interventional ultrasound puncture assisted guide is a medical device used for puncture operations under ultrasound guidance. It usually consists of an ultrasound probe and a puncture needle. The ultrasound probe is used to display the position and morphology of the target tissue or organ in real time, while the puncture needle is used to accurately penetrate the target tissue or organ for further treatment or diagnosis. The interventional ultrasound puncture assisted guide is widely used in various clinical fields, such as tumor treatment, nerve block, joint cavity injection, etc.

[0003] Most of the existing interventional ultrasound puncture auxiliary guides fix the puncture needle to one side of the ultrasound probe. When the ultrasound probe moves, it will drive the puncture needle to move. When encountering a larger diseased area, after the puncture needle is inserted into the human body, the movement of the ultrasound probe will drive the puncture needle to move, resulting in the puncture position cannot be changed, and the drug solution cannot be delivered to more places in the diseased area.

[0004] Combining the above problems, we will find that it is difficult to avoid the above problems at the same time when using the existing interventional ultrasound puncture auxiliary guides on the market, and even if they can be solved, they need to be solved with the cooperation of external tools, which makes it impossible to achieve the desired effect. Therefore, we propose an interventional ultrasound puncture auxiliary guide. Summary of the invention

[0005] The purpose of the present invention is to provide an interventional ultrasonic puncture auxiliary guide to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an interventional ultrasonic puncture auxiliary guide, comprising a shell having a hollow interior and an opening on one side, an ultrasonic probe and a puncture needle being arranged on one side of the shell, a moving mechanism for driving the ultrasonic probe to move being arranged on one side of the shell, an angle adjustment mechanism for adjusting the direction of the puncture needle being arranged on one side of the shell, and a fixing mechanism for fixing the puncture needle being arranged inside the angle adjustment mechanism; The moving mechanism includes a first motor, which is fixedly connected to one side of the shell. The output end of the first motor passes through the shell and is fixedly connected to a screw rod. The other end of the screw rod is rotatably connected in the shell. The outer surface of the screw rod is threadedly connected to a threaded seat.

[0007] Preferably, a first electric telescopic rod is fixedly connected to one side of the threaded seat, and a mounting piece is fixedly connected to the other end of the first electric telescopic rod.

[0008] Preferably, a telescopic damping rod is fixedly connected to the bottom of the mounting piece, the other end of the telescopic damping rod is fixedly connected to the top of the ultrasonic probe, a first spring is fixedly sleeved on the outer surface of the telescopic damping rod, and a second electric telescopic rod is fixedly connected to the bottom of the shell.

[0009] Preferably, the angle adjustment mechanism comprises a mounting seat, one side of the mounting seat is fixedly connected to one side of the shell, and the other side of the mounting seat is fixedly connected to a third electric telescopic rod.

[0010] Preferably, one end of the third electric telescopic rod is fixedly connected to a second motor, and an output shaft of the second motor is fixedly connected to an internal hollow iron piece.

[0011] Preferably, a plurality of groups of second springs are fixedly connected inside the iron piece, the other ends of the plurality of groups of second springs are fixedly connected to a sleeve with openings at the top and bottom, and the puncture needle is movably inserted inside the sleeve.

[0012] Preferably, two groups of fourth electric telescopic rods are fixedly connected to the outer surface of the sleeve, the other ends of the fourth electric telescopic rods are fixedly connected to magnets, and the other sides of the magnets are actively magnetically connected to the inner surface of the iron piece.

[0013] Preferably, the fixing mechanism comprises two groups of movable tracks, both groups of movable tracks are arranged inside the sleeve, and a plurality of groups of slots are arranged inside the sleeve.

[0014] Preferably, two groups of moving parts are fixedly connected to the outer surface of the puncture needle, and the outer surfaces of the moving parts are movably inserted into the interior of the card slot.

[0015] Preferably, cavities are provided at the top and bottom of the movable part, sliders are slidably connected inside the two groups of cavities, a third spring is fixedly connected to the bottom of the slider, the other end of the third spring is fixedly connected to the inside of the cavity, a clamp is fixedly connected to the top of the slider, and chamfers are provided at both corners of the clamp.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes a moving mechanism, which can drive the ultrasonic probe to move left and right by controlling the first motor to drive the screw to rotate, drive the ultrasonic probe to move forward and backward by controlling the first electric telescopic rod, and drive the ultrasonic probe to move up and down by controlling the second electric telescopic rod, so that the ultrasonic probe can move in all directions, thereby being more convenient to use when treating patients with larger diseased areas. The present invention utilizes an angle adjustment mechanism, and can adjust the direction of the puncture needle needle by controlling the second motor to drive the iron piece to rotate, and at the same time control the third electric telescopic rod to drive the puncture needle to move so that the needle tip is aimed at the diseased area. When the diseased area is large, the puncture needle can be manually controlled to move inside the iron piece, and the needle tip goes to different positions. After reaching the position, the fourth electric telescopic rod is controlled to drive the magnet to move so that the magnet is adsorbed to the inner surface of the iron piece, and the sleeve is fixed inside the iron piece, thereby being more convenient to use when treating patients with larger diseased areas. The present invention utilizes a fixing mechanism, and when the moving part is located in the moving track, the puncture needle can move, and when the puncture needle is rotated so that the moving part is located in the card slot, the moving part can be fixed in the card slot through the card slot, and the puncture needle is fixed in the sleeve, so that it is convenient to deliver medicine to the diseased area through the puncture needle without the support of staff, and by setting multiple groups of card slots, when encountering a patient with a larger diseased area, the needle can be inserted deeper and moved to different positions for drug delivery, so that it is more convenient to use when treating patients with a larger diseased area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic structural diagram of a second motor of the present invention; Figure 3 is a cross-sectional view of the iron piece of the present invention; Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 is a cross-sectional view of the sleeve of the present invention; Figure 6 It is a structural schematic diagram of the moving part of the present invention; Figure 7 It is a cross-sectional view of the moving part of the present invention.

[0018] In the figure: 1. ultrasonic probe; 2. moving mechanism; 201. first spring; 202. telescopic damping rod; 203. mounting member; 204. first motor; 205. screw; 206. housing; 207. first electric telescopic rod; 208. threaded seat; 209. second electric telescopic rod; 3. angle adjustment mechanism; 301. mounting seat; 302. third electric telescopic rod; 303. second motor; 304. iron piece; 305. sleeve; 306. second spring; 307. fourth electric telescopic rod; 308. magnet; 4. fixing mechanism; 401. moving track; 402. slot; 403. moving member; 404. clamping member; 405. chamfer; 406. slider; 407. cavity; 408. third spring; 5. puncture needle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 creative work are within the scope of protection of the present invention. Example

[0020] See also Figure 1-Figure 7 The present invention provides a technical solution: an interventional ultrasonic puncture auxiliary guide, including a shell 206 that is hollow inside and open on one side, an ultrasonic probe 1 and a puncture needle 5 are arranged on one side of the shell 206, the ultrasonic probe 1 is electrically connected to the ultrasonic device, and a moving mechanism 2 for driving the ultrasonic probe 1 to move is arranged on one side of the shell 206.

[0021] As a further limitation of the mobile mechanism 2 of the present invention, the mobile mechanism 2 includes a first motor 204, which is fixedly connected to one side of a shell 206. The output end of the first motor 204 passes through the shell 206 and is fixedly connected to a screw 205. The other end of the screw 205 is rotatably connected in the shell 206. The outer surface of the screw 205 is threadedly connected to a threaded seat 208. Through the setting of the first motor 204, the first motor 204 can be controlled to rotate, driving the screw 205 to rotate, and driving the threaded seat 208 with a threaded connection to move in the shell 206.

[0022] A first electric telescopic rod 207 is fixedly connected to one side of the threaded seat 208, and a mounting piece 203 is fixedly connected to the other end of the first electric telescopic rod 207. Through the setting of the first electric telescopic rod 207, the mounting piece 203 can be driven to move forward and backward by controlling the first electric telescopic rod 207, and the mounting piece 203 can be driven to move left and right by moving the threaded seat 208.

[0023] A telescopic damping rod 202 is fixedly connected to the bottom of the mounting member 203, and the other end of the telescopic damping rod 202 is fixedly connected to the top of the ultrasonic probe 1. A first spring 201 is fixedly sleeved on the outer surface of the telescopic damping rod 202. A second electric telescopic rod 209 is fixedly connected to the bottom of the shell 206, and one end of the second electric telescopic rod 209 is fixed on the bracket, which is a bracket used for patient treatment. Through the setting of the second electric telescopic rod 209, the mounting member 203 can be driven to move up and down by controlling the second electric telescopic rod 209. When the ultrasonic probe 1 is in close contact with the surface of the human body, it continues to move downward for a certain distance to shrink the first spring 201 and the telescopic damping rod 202. Because pustules are often prone to bulging in the patient's diseased area, the elastic potential energy released by the first spring 201 and the telescopic damping rod 202 enables the ultrasonic probe 1 to always be in close contact with the outer surface of the diseased area.

[0024] The specific implementation of this embodiment is as follows: the first motor 204 can be controlled to rotate, drive the screw rod 205 to rotate, drive the threaded seat 208 connected by the thread to move in the shell 206, and drive the mounting member 203 to move left and right through the movement of the threaded seat 208. The mounting member 203 is driven to move forward and backward by controlling the first electric telescopic rod 207, and the mounting member 203 is driven to move up and down by controlling the second electric telescopic rod 209, that is, the ultrasonic probe 1 can be driven to move comprehensively. When the ultrasonic probe 1 is in close contact with the surface of the human body, it continues to move downward for a certain distance, so that the first spring 201 and the telescopic damping rod 202 are contracted. Because pustules are often easily bulged in the patient's diseased area, the elastic potential energy released by the first spring 201 and the telescopic damping rod 202 enables the ultrasonic probe 1 to always be in close contact with the outer surface of the diseased area, so that the diseased area can be detected in all directions, which is more convenient to use when treating patients with larger diseased areas. Example

[0025] See also Figure 1 - Figure 7 The present invention provides a technical solution: an interventional ultrasonic puncture auxiliary guide. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. An angle adjustment mechanism 3 for adjusting the direction of the needle head of the puncture needle 5 is provided on one side of the shell 206.

[0026] As a further limitation of the angle adjustment mechanism 3 of the present invention, the angle adjustment mechanism 3 includes a mounting seat 301, one side of the mounting seat 301 is fixedly connected to one side of the shell 206, and the other side of the mounting seat 301 is fixedly connected to a third electric telescopic rod 302. Through the setting of the third electric telescopic rod 302, the third electric telescopic rod 302 can be controlled to drive the iron piece 304 to move and adjust the position of the iron piece 304.

[0027] One end of the third electric telescopic rod 302 is fixedly connected to the second motor 303 , and the output shaft of the second motor 303 is fixedly connected to the internal hollow iron piece 304 . Through the setting of the second motor 303 , the second motor 303 can be controlled to drive the iron piece 304 to rotate.

[0028] A plurality of groups of second springs 306 are fixedly connected inside the iron piece 304, and the other ends of the plurality of groups of second springs 306 are fixedly connected to a sleeve 305 with openings at the top and bottom. The puncture needle 5 is movably inserted into the sleeve 305. Through the setting of the second spring 306, the puncture needle 5 is adjusted in position and direction by the second motor 303 and the third electric telescopic rod 302, and then the puncture needle 5 is manually inserted into the diseased area for drug delivery. When the diseased area is large, the second spring 306 can be used to control the fine-tuning position of the puncture needle 5 in the human body, so as to deliver the drug to more locations in the larger diseased area.

[0029] Two sets of fourth electric telescopic rods 307 are fixedly connected to the outer surface of the sleeve 305, and the other ends of the fourth electric telescopic rods 307 are fixedly connected to magnets 308. The other side of the magnet 308 is actively magnetically connected to the inner surface of the iron piece 304. Through the setting of the magnet 308, the puncture needle 5 moves to the specified position. When the medicine needs to be delivered, in order to prevent the sleeve 305 from continuing to move and affecting the position of the needle, the fourth electric telescopic rod 307 can be controlled to drive the magnet 308 to move, so that the magnet 308 is adsorbed to the inner surface of the iron piece 304, and the sleeve 305 is fixed inside the iron piece 304.

[0030] The specific implementation of this embodiment is as follows: after the puncture needle 5 is adjusted in position and direction by the second motor 303 in cooperation with the third electric telescopic rod 302, the puncture needle 5 is manually inserted into the diseased area to deliver the medicine. When the diseased area is large, the second spring 306 can be set to control the puncture needle 5 to fine-tune its position in the human body and deliver the medicine to more locations in the larger diseased area. When the puncture needle 5 moves to the designated position and needs to deliver the medicine, in order to prevent the sleeve 305 from continuing to move and affecting the position of the needle, the fourth electric telescopic rod 307 can be controlled to drive the magnet 308 to move so that the magnet 308 is adsorbed to the inner surface of the iron piece 304, and the sleeve 305 is fixed inside the iron piece 304, which is more convenient to use when treating patients with larger diseased areas. Example

[0031] See also Figure 1-Figure 7 The present invention provides a technical solution: an interventional ultrasonic puncture auxiliary guide. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A fixing mechanism 4 for fixing the puncture needle 5 is arranged inside the angle adjustment mechanism 3.

[0032] As a further limitation of the fixing mechanism 4 of the present invention, the fixing mechanism 4 includes a movable track 401, and the number of the movable track 401 is two groups. The two groups of movable tracks 401 are both opened inside the sleeve 305. The interior of the sleeve 305 is opened with multiple groups of card slots 402. The outer surface of the puncture needle 5 is fixedly connected with two groups of moving parts 403. The outer surface of the moving part 403 is movably inserted into the interior of the card slot 402. Through the setting of the movable track 401, when the moving part 403 is in the movable track 401, the moving part 403 can move in the sleeve 305. When the moving part 403 is in the card slot 402, the moving part 403 will not be able to move, and the card slot 404 will be fixed in the sleeve 305. In addition, by setting multiple groups of card slots 402, when encountering a patient with a larger diseased area, the needle can be poked deeper and moved to different positions for drug delivery, so that it is more convenient to use when treating patients with a larger diseased area.

[0033] The top and bottom of the moving member 403 are provided with cavities 407, and sliders 406 are slidably connected inside the two groups of cavities 407. The bottom of the slider 406 is fixedly connected with a third spring 408, and the other end of the third spring 408 is fixedly connected to the inside of the cavity 407. The top of the slider 406 is fixedly connected with a clamp 404, and both corners of the clamp 404 are provided with chamfers 405. By setting the chamfers 405, when the moving member 403 moves from the moving track 401 When inserted into the card slot 402, the chamfer 405 provided on the card member 404 will be squeezed, causing the card member 404 to move into the cavity 407, driving the slider 406 to slide in the cavity 407, compressing the third spring 408. When the card member 404 is completely moved into the card slot 402, the third spring 408 releases its elastic potential energy, causing one end of the card member 404 to cling to the inner wall of the card slot 402, thereby preventing the moving member 403 from moving in the card slot 402 when the puncture needle 5 is not subjected to external force.

[0034] The specific implementation of this embodiment is as follows: when the moving member 403 is in the moving track 401, the moving member 403 can move in the sleeve 305, and when the moving member 403 is in the card slot 402, the moving member 403 cannot move, and the card slot 404 is fixed in the sleeve 305. By setting multiple groups of card slots 402, when encountering a patient with a larger diseased area, the needle can be inserted deeper and moved to different positions for drug delivery, so that it is more convenient to use when treating patients with a larger diseased area. When the moving member 403 is inserted into the card slot 402 from the moving track 401, the chamfer 405 opened on the card slot 404 will be squeezed, so that the card slot 404 moves into the cavity 407, driving the slider 406 to slide in the cavity 407, compressing the third spring 408. When the card slot 404 is completely moved into the card slot 402, the third spring 408 releases its elastic potential energy, so that one end of the card slot 404 is close to the inner wall of the card slot 402, thereby preventing the moving member 403 from moving in the card slot 402 when the puncture needle 5 is not subjected to external force.

[0035] Working principle: When in use, the first motor 204 can be controlled to rotate, driving the screw rod 205 to rotate, driving the threaded seat 208 connected with the thread to move in the housing 206, and the installation part 203 is driven to move left and right by the movement of the threaded seat 208. The installation part 203 is driven to move forward and backward by controlling the first electric telescopic rod 207, and the installation part 203 is driven to move up and down by controlling the second electric telescopic rod 209. That is, the ultrasonic probe 1 can be driven to move comprehensively. When the ultrasonic probe 1 is close to the surface of the human body, it continues to move downward for a certain distance, so that the first spring 201 and the telescopic damping rod 202 are contracted. The patient's diseased area is often prone to pustule, so the elastic potential energy released by the first spring 201 and the telescopic damping rod 202 allows the ultrasonic probe 1 to always be in close contact with the outer surface of the diseased area, and can detect the diseased area in all directions. After the puncture needle 5 is adjusted in position and direction by the second motor 303 and the third electric telescopic rod 302, the puncture needle 5 is manually inserted into the diseased area to deliver the liquid medicine. When the diseased area is large, the second spring 306 can be set to control the puncture needle 5 to fine-tune its position in the human body, and deliver the liquid medicine to more locations in the larger diseased area. The puncture needle 5 moves When the medicine needs to be delivered to the designated position, in order to prevent the sleeve 305 from continuing to move and affecting the position of the needle, the fourth electric telescopic rod 307 can be controlled to drive the magnet 308 to move, so that the magnet 308 is adsorbed to the inner surface of the iron piece 304, and the sleeve 305 is fixed inside the iron piece 304. When the moving part 403 is in the moving track 401, the moving part 403 can move in the sleeve 305. When the moving part 403 is in the card slot 402, the moving part 403 will not be able to move, and the card slot 404 is fixed in the sleeve 305. By setting multiple groups of card slots 402, when encountering When the patient has a larger affected area, the needle can be inserted deeper and moved to different positions for drug delivery. When the movable member 403 is inserted into the card slot 402 from the movable track 401, the chamfer 405 opened by the card member 404 will be squeezed, so that the card member 404 moves into the cavity 407, driving the slider 406 to slide in the cavity 407, compressing the third spring 408. When the card member 404 is completely moved into the card slot 402, the third spring 408 releases its elastic potential energy, so that one end of the card member 404 is close to the inner wall of the card slot 402, thereby preventing the movable member 403 from moving in the card slot 402 when the puncture needle 5 is not subjected to external force.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An interventional ultrasound puncture auxiliary guide, comprising a shell (206) which is hollow inside and has an opening on one side, an ultrasound probe (1) and a puncture needle (5) being arranged on one side of the shell (206), characterized in that: A moving mechanism (2) for driving the ultrasonic probe (1) to move is disposed on one side of the housing (206), an angle adjustment mechanism (3) for adjusting the direction of the needle tip of the puncture needle (5) is disposed on one side of the housing (206), and a fixing mechanism (4) for fixing the puncture needle (5) is disposed inside the angle adjustment mechanism (3); The moving mechanism (2) comprises a first motor (204), the first motor (204) being fixedly connected to one side of a housing (206), the output end of the first motor (204) passing through the housing (206) and being fixedly connected to a screw rod (205), the other end of the screw rod (205) being rotatably connected in the housing (206), and the outer surface of the screw rod (205) being threadedly connected to a threaded seat (208).

2. The interventional ultrasound puncture auxiliary guide according to claim 1, characterized in that: A first electric telescopic rod (207) is fixedly connected to one side of the threaded seat (208), and a mounting piece (203) is fixedly connected to the other end of the first electric telescopic rod (207).

3. The interventional ultrasound puncture auxiliary guide according to claim 2, characterized in that: A telescopic damping rod (202) is fixedly connected to the bottom of the mounting member (203); the other end of the telescopic damping rod (202) is fixedly connected to the top of the ultrasonic probe (1); a first spring (201) is fixedly sleeved on the outer surface of the telescopic damping rod (202); and a second electric telescopic rod (209) is fixedly connected to the bottom of the housing (206).

4. The interventional ultrasound puncture auxiliary guide according to claim 1, characterized in that: The angle adjustment mechanism (3) comprises a mounting seat (301), one side of the mounting seat (301) is fixedly connected to one side of the housing (206), and the other side of the mounting seat (301) is fixedly connected to a third electric telescopic rod (302).

5. The interventional ultrasound puncture auxiliary guide according to claim 4, characterized in that: One end of the third electric telescopic rod (302) is fixedly connected to a second motor (303), and an output shaft of the second motor (303) is fixedly connected to an internal hollow iron piece (304).

6. The interventional ultrasound puncture auxiliary guide according to claim 5, characterized in that: The iron piece (304) is fixedly connected to a plurality of groups of second springs (306) inside, and the other ends of the plurality of groups of second springs (306) are fixedly connected to a sleeve (305) with openings at the top and bottom inside, and the puncture needle (5) is movably inserted inside the sleeve (305).

7. The interventional ultrasound puncture auxiliary guide according to claim 6, characterized in that: Two groups of fourth electric telescopic rods (307) are fixedly connected to the outer surface of the sleeve (305), the other ends of the fourth electric telescopic rods (307) are fixedly connected to magnets (308), and the other sides of the magnets (308) are actively magnetically connected to the inner surface of the iron piece (304).

8. The interventional ultrasound puncture auxiliary guide according to claim 1, characterized in that: The fixing mechanism (4) comprises two sets of movable tracks (401). Both sets of movable tracks (401) are arranged inside the sleeve (305). The sleeve (305) has a plurality of sets of slots (402) arranged inside.

9. The interventional ultrasound puncture auxiliary guide according to claim 6, characterized in that: Two groups of moving parts (403) are fixedly connected to the outer surface of the puncture needle (5), and the outer surface of the moving part (403) is movably inserted into the interior of the card slot (402).

10. The interventional ultrasound puncture auxiliary guide according to claim 9, characterized in that: The top and bottom of the moving member (403) are both provided with cavities (407), two groups of cavities (407) are slidably connected with sliders (406), the bottom of the slider (406) is fixedly connected with a third spring (408), the other end of the third spring (408) is fixedly connected to the inside of the cavity (407), the top of the slider (406) is fixedly connected with a clamping member (404), and both corners of the clamping member (404) are provided with chamfers (405).

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