Guide needle guide mechanism

Abstract

The present invention provides a guide needle guiding mechanism, which relates to the technical field of medical devices. The guide needle guiding mechanism includes: a positioning seat, which is provided with a through hole penetrating the front and rear surfaces; a guide block, which is provided at the proximal end of the positioning seat and has a guide channel penetrating the front and rear, wherein the guide channel is configured to swing around the front end of the through hole; a locking structure, which is provided on the guide block and the positioning seat to fix the guide channel at a desired position; and a handle, the front end of which is angularly coupled to the positioning seat. In the guide needle guiding mechanism, by rotating the guide block, the degree of inclination of the guide channel is changed, thereby changing the insertion direction of the guide needle, which facilitates the doctor to quickly adjust the angle during the operation and avoids frequent tool changes, thereby improving the efficiency of the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a guide needle guiding mechanism. Background Art

[0002] During shoulder replacement surgery, guide pin positioning is fundamental to the subsequent installation of artificial shoulder components, determining the angle of the glenoid base. To ensure adequate range of motion and optimal shoulder force distribution after surgery, surgeons must pre-design and estimate the guide pin angle to ensure the glenoid base closely reflects the patient's original force distribution.

[0003] Currently, the guide needle guides provided for shoulder replacement surgery only have two optional directions: 0° and 10°, which cannot fully meet the anatomical restoration emphasized in modern surgical trends and the needs of the human body in different situations.

[0004] Different shoulder joint conditions require different guide wire drilling angles, and doctors may need to replace tools when matching them. If they lack experience, the number of adjustments will increase, delaying the operation time. Summary of the Invention

[0005] The purpose of the present invention is to provide a guide needle guiding mechanism to alleviate the technical problem in the prior art that different drilling angles are required for different shoulder joint conditions, and doctors may need to replace tools when matching them. If they lack experience, the number of adjustments will increase, delaying the operation time.

[0006] A guide needle guide mechanism provided by an embodiment of the present invention includes: a positioning seat having a through hole extending through its front and rear surfaces; a guide block disposed at the proximal end of the positioning seat and having a guide channel extending through its front and rear surfaces, wherein the guide channel is configured to swing about the front end of the through hole; a locking structure disposed on the guide block and the positioning seat to secure the guide channel in a desired position; and a handle, the front end of which is angularly coupled to the positioning seat. During positioning, the surgeon grasps the handle and inserts the guide needle into the guide mechanism. The guide needle passes through the guide channel and exits through the through hole. The surgeon rotates the guide block relative to the positioning seat to the desired angle, thereby adjusting the inclination of the guide channel. The guide needle swings along the edge of the through hole, driving the guide block to swing. Finally, the locking structure locks the guide block and the positioning seat together to prevent further relative swinging. In the guide needle guide mechanism, rotating the guide block changes the inclination of the guide channel, thereby changing the insertion direction of the guide needle. This facilitates quick angle adjustment during surgery, avoids frequent tool changes, and improves surgical efficiency.

[0007] In some embodiments, the locking structure includes a first locking assembly resettably disposed on the guide block and a second locking assembly disposed on the positioning seat, wherein when the first locking assembly is coupled with the second locking assembly, the guide block is fixed to the positioning seat; when the first locking assembly is separated from the second locking assembly, the rear end of the guide block can swing around the front end of the through hole along the axial surface of the positioning seat. The first locking assembly is disposed on the guide block, and by switching the states of the first locking assembly and the second locking assembly, the guide block can be fixed relative to the positioning seat or can be rotated relative to the positioning seat, and the switching between the fixed and rotating states is convenient.

[0008] In some embodiments, a limiting mechanism is further included, comprising a first limiting portion disposed on the positioning seat, and a second limiting portion disposed on the guide block that matches the first limiting portion, wherein one of the first limiting portion and the second limiting portion is a limiting portion, and the other is a swinging portion; the limiting portion extends along the axial surface of the positioning seat, and the swinging portion slides on the limiting portion and is restricted in its rearward movement by the limiting portion. When the guide block swings relative to the positioning seat, the limiting portion and the swinging portion abut against each other, preventing the guide block from separating from the positioning seat.

[0009] In some embodiments, the guide block is at least partially disposed within the mounting seat, wherein the mounting seat includes a mounting seat disposed behind the positioning seat, the front end of the mounting seat being in communication with the through hole. The inner wall of the mounting seat includes a first limiting edge and a second limiting edge disposed along the axial surface of the positioning seat, with the front ends of the first limiting edge and the second limiting edge being close to each other. The first limiting edge and the second limiting edge provide the guide block with a maximum and minimum tilt angle, thereby preventing the guide block from exceeding the limit during adjustment.

[0010] In some embodiments, the first limiting portion is disposed on an inner wall of the mounting seat, and the second limiting portion is disposed outside the guide block. The second limiting portion may be located inside the mounting seat to facilitate interaction between the first limiting portion and the second limiting portion.

[0011] In some embodiments, the limiting portions are strip-shaped holes provided on both sides of the inner wall of the mounting base, and the swinging portion is a swing shaft that fits within the strip-shaped holes. The swing shaft can slide within the strip-shaped holes and can rotate relative to the strip-shaped holes. The strip-shaped holes act as a limit in all directions, preventing the swing shaft from sliding out of the strip-shaped holes.

[0012] In some embodiments, the first limiting portion is a step; the second limiting portion is a protrusion protruding outward, and the step limits the protrusion from moving backward. The step acts as a stop and limit, and the protrusion cannot go over the step, that is, the guide block cannot be pulled out of the positioning seat.

[0013] In some embodiments, the guide block includes a front small-diameter portion and a rear large-diameter portion, and the first locking assembly includes: a hollow locking member having a front small-diameter cavity, a middle medium-diameter cavity, and a rear large-diameter cavity, wherein the outer diameter of the small-diameter portion matches the small-diameter cavity, and the outer diameter of the large-diameter portion matches the large-diameter cavity; and an elastic reset member, whose front end abuts against the step between the small-diameter cavity and the middle-diameter cavity, and whose rear end abuts against the step between the small-diameter portion and the large-diameter portion, so that the locking member has a tendency to move toward the second locking assembly. The elastic reset member provides an automatic reset function for the locking member. After the doctor releases the locking member, the locking member can automatically move toward the second locking assembly to achieve locking of the guide block and the positioning seat.

[0014] In some embodiments, the locking member and the guide block are provided with corresponding limiting structures, the limiting structures being used to prevent the locking member from rotating relative to the guide block, thereby preventing the first locking assembly and the second locking assembly from deviating.

[0015] In some embodiments, the first locking assembly includes a stopper pin, and the second locking assembly includes a plurality of slots arranged along the swing direction of the guide block. The stopper pin extends into the slot, and the slot prevents the stopper pin from rotating. The plurality of slots can enable the guide block to have multiple angular gears.

[0016] In some embodiments, an indicator scale is provided near the card slot to indicate the angle between the guide channel and the axis of the positioning seat, so that the doctor can read it quickly.

[0017] In some embodiments, the through hole is arranged at the center of the positioning seat and is smaller in front and larger in the rear along the swing direction of the guide block. The front opening of the through hole can support the guide needle so that the guide needle and the guide block can swing relative to the front opening of the through hole.

[0018] In some embodiments, the positioning bases on both sides of the through hole have symmetrical left and right assembly holes, and the handles are detachably connected to the left and right assembly holes, respectively. The surgeon adjusts the position of the handles according to whether the tissue to be treated is located on the left or right side of the human body during surgery.

[0019] In some embodiments, the left and right assembly holes are closer to each other from back to front. The handle connected to the left assembly hole or the right assembly hole is away from the guide block to prevent the handle from interfering with the adjustment of the guide block when the doctor holds the handle.

[0020] In some embodiments, a through-window hole is provided on the positioning seat above the through hole to provide more visual fields for surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a guide needle guiding mechanism provided in Example 1 of the present invention;

[0023] Figure 2 for Figure 1 A partial enlarged view of position A in the middle;

[0024] Figure 3 A rear view of the guide needle guide mechanism provided in Example 1 of the present invention;

[0025] Figure 4 for Figure 3 Cross-sectional view in the middle BB direction;

[0026] Figure 5 for Figure 3 Cross-sectional view in CC direction;

[0027] Figure 6 This is a schematic diagram of the guide block of the guide needle guide mechanism provided in Example 1 of the present invention after it swings to the maximum tilt angle;

[0028] Figure 7 This is a rear view of the guide needle guide mechanism provided in Example 2 of the present invention;

[0029] Figure 8 for Figure 7 Cross-sectional view in the middle DD direction;

[0030] Figure 9 for Figure 7 Cross-sectional view along the EE direction.

[0031] Icon: 100- positioning seat; 110- through hole; 120- axis hole; 130- first limiting edge; 140- second limiting edge; 150- slot; 160- window hole; 170- arc surface;

[0032] 200 - guide block; 210 - swing shaft; 220 - slide groove; 230 - second stop surface; 240 - guide channel;

[0033] 300-locking member; 310-needle stopper; 320-guide post; 330-first stop surface;

[0034] 400-spring;

[0035] 500-handle;

[0036] 610-steps; 620-bumps. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1

[0039] The guide pin guiding mechanism provided in the embodiment of the present invention can be used for transplanting glenoid prostheses and humeral prostheses.

[0040] like Figures 1-6 As shown, the mechanism includes: a positioning seat 100 and a guide block 200, arranged in sequence along the front and back sides. The positioning seat 100 is provided with a through hole 110 extending through the front and back surfaces. The guide block 200 is provided with a guide channel 240. The aperture of the guide channel 240 corresponds to the aperture of the guide needle, and the guide channel 240 serves to guide the guide needle. The guide block 200 can swing relative to the positioning seat 100, so that the guide channel 240 is configured to swing around the front opening of the through hole 110. A locking structure is provided between the guide block 200 and the positioning seat 100. When the guide block 200 is rotated to the desired angle, the locking structure can be used to lock the guide block 200 and the positioning seat 100 together, thereby fixing the orientation of the guide channel 240 and allowing subsequent transplantation operations to proceed. The handle 500 on the positioning seat 100 is convenient for the surgeon to hold, and the handle 500 is tilted relative to the positioning seat 100 to reduce interference with the surgical procedure.

[0041] During positioning, the guide needle is inserted into the guide mechanism, and the guide needle passes through the guide channel 240 and then out of the through hole 110. The doctor rotates the guide block 200 relative to the positioning seat 100 according to the required angle, thereby adjusting the inclination angle of the guide channel 240. The guide needle drives the guide block 200 to swing to the desired position with the front end exit edge of the through hole 110 as the fulcrum. The guide block 200 and the positioning seat 100 are locked and fixed using a locking structure to prevent the two from swinging relative to each other again. In the guide needle guiding mechanism, the guide block 200 is rotated to change the degree of inclination of the guide channel 240, thereby changing the insertion direction of the guide needle, which facilitates the doctor to quickly adjust the angle during the operation and avoids frequent tool changes, thereby improving the efficiency of the operation.

[0042] The locking structure includes a first locking assembly repositionably mounted on the guide block 200 and a second locking assembly mounted on the positioning seat 100. When the first locking assembly is coupled with the second locking assembly, the guide block 200 is fixed to the positioning seat 100, and the orientation of the guide channel 240 is fixed relative to the positioning seat 100, allowing the doctor to continue inserting the guide needle through the guide channel 240. When the first locking assembly is separated from the second locking assembly, the rear end of the guide block 200 can swing around the front end of the through hole 110 along the axial plane of the positioning seat 100, thereby modifying the orientation of the guide needle so that the new orientation meets the doctor's requirements.

[0043] The mechanism also includes a limiting mechanism, which includes a first limiting portion provided on the positioning seat 100, and a second limiting portion provided on the guide block 200 and matching the first limiting portion, wherein one of the first limiting portion and the second limiting portion is a limiting portion, and the other is a swinging portion; the limiting portion extends along the axial surface of the positioning seat 100, and the swinging portion slides on the limiting portion and is restricted from moving backward by the limiting portion. When the guide block 200 swings relative to the positioning seat 100, the limiting portion and the swinging portion abut against each other to prevent the guide block 200 from separating from the positioning seat 100. Specifically, as Figure 4 As shown, the limiting portion can extend along the swing path of the guide block 200. The swing portion is slidably connected to the limiting portion, and the limiting portion prevents the swing portion from moving backward, thereby preventing the guide portion from separating from the positioning seat 100. The limiting portion can extend along the swing path of the guide block 200. The limiting portion is used to limit the swing portion to move only along the swing path, thereby playing a role in stabilizing and adjusting, and preventing the guide block 200 from deviating.

[0044] The swinging portion may be a swing shaft 210 , and the limiting portion may be a shaft hole 120 . The swing shaft 210 is located in the shaft hole 120 . The shaft hole 120 is a strip-shaped hole extending along the swinging direction. The swing shaft 210 can slide along the shaft hole 120 .

[0045] The swing shaft 210 is located within the shaft hole 120, allowing the guide block 200 to swing relative to the positioning seat 100. The shaft hole 120 is a strip-shaped hole extending in the swinging direction. The swing shaft 210 can slide along the shaft hole 120, so that the guide channel 240 is aligned with the outlet of the through hole 110 in different directions. The extension path of the guide channel 240 passes through the through hole 110. A guide pin is located within the guide channel 240 and the through hole 110. When the guide block 200 is rotated, the guide pin can swing with the edge of the outlet of the through hole 110 as a fulcrum. The swing shaft 210 not only rotates relative to the shaft hole 120, but also slides relative to the shaft hole 120.

[0046] After the guide block 200 is unlocked from the positioning base 100, it can be freely rotated to achieve infinite adjustment. For experienced doctors, this allows them to adjust the tilt angle freely without having to adjust each angle one by one, making the operation more convenient. For example, a doctor can adjust the tilt angle of the guide block 200 from 0° to 8° at once, rather than having to adjust it from 0° to 8° one by one with the minimum precision.

[0047] The through hole 110 is provided at the center of the positioning seat 100 and is smaller in the front and larger in the back along the swing direction of the guide block 200. Figure 4 As shown, the through hole 110 includes an inlet and an outlet. In the swing direction of the guide block 200, the width of the inlet is greater than the width of the outlet. The guide needle passing through the guide channel 240 enters the through hole 110 through the inlet and exits through the outlet. To accommodate the swing amplitude of the guide block 200, the inlet of the through hole 110 is relatively large, especially with a wider opening in the swing direction of the guide block 200. The purpose of providing a relatively small outlet is to enable the guide needle to exit at a fixed position. The outlet diameter of the through hole 110 is slightly larger than the diameter of the guide needle. In other words, this mechanism can adjust the guide needle's exit direction, but the exit position remains unchanged as much as possible.

[0048] A mounting seat is provided on the back side of the positioning seat 100, and the mounting seat is communicated with the through hole 110. A mounting portion is provided at the front end of the guide block 200, and the guide channel 240 passes through the mounting portion; the mounting portion is located in the mounting seat, the first limiting portion is located on the hole wall of the mounting seat, and the second limiting portion is located on the mounting portion; the mounting seat includes a first limiting edge 130 and a second limiting edge 140 spaced apart in the swinging direction, and the distance between the first limiting edge 130 and the second limiting edge 140 gradually decreases in the direction from back to front.

[0049] The setting of the mounting seat provides space for the arrangement of the swing shaft 210 and the shaft hole 120. In this embodiment, the shaft hole 120 can be set on the side wall of the mounting seat, and the swing shaft 210 is set on the mounting portion. Therefore, there is a large installation space on the positioning portion, which is convenient for arranging the strip holes, and the mounting portion located in the mounting seat is relatively small in volume, which is suitable for arranging the swing shaft 210. The first limiting edge 130 and the second limiting edge 140 in the mounting seat enable the guide block 200 to have a maximum tilt angle and a minimum tilt angle to avoid exceeding the limit during adjustment. Among them, the first limiting edge 130 can be set along the front-to-back direction, such as Figure 4 As shown, when the guide block 200 abuts against the first limiting edge 130, the guide channel 240 extends in the front-to-back direction, that is, the guide needle passes through at 0° relative to the reference line, and the angle between the second limiting edge 140 and the first limiting edge 130 can be 10°, as shown in FIG. Figure 6As shown, when the guide block 200 rotates to abut against the second limiting edge 140, the guide channel 240 rotates 10 degrees, that is, the guide needle passes through the direction inclined 10 degrees to the reference line. The reference line in this embodiment is parallel to the front-back direction.

[0050] In another feasible solution, the swing shaft 210 may also be provided on the positioning seat 100 , while the strip-shaped shaft hole 120 is provided on the guide block 200 .

[0051] The locking structure includes a locking piece 300 arranged on the guide block 200, a first locking component is provided on the locking piece 300, and a second locking component is provided on the positioning seat 100. The locking piece 300 is movably connected to the guide block 200 to connect or separate the first locking component and the second locking component; the first locking component and the second locking component in the connected state are used to fix the guide block 200 and the positioning seat 100 when the guide channel 240 is aligned with the outlet of the through hole 110 in a selected direction; when the first locking component and the second locking component are in a separated state, the guide block 200 can move relative to the positioning seat 100.

[0052] like Figure 4 As shown, the locking member 300 and the guide block 200 can be connected by either a sliding connection or a rotational connection. After the locking member 300 moves relative to the guide block 200, the first locking assembly on the locking member 300 connects or disconnects with the second locking assembly. When disconnected, the guide block 200 can move relative to the positioning seat 100. After the doctor adjusts the guide block 200 to a suitable angle, he operates the locking member 300 to connect the first locking assembly with the second locking assembly. At this time, the guide channel 240 is aligned with the outlet of the through hole 110 in the selected direction, fixing the guide block 200 to the positioning seat 100.

[0053] The locking member 300 is slidably connected to the guide block 200, and the sliding direction is consistent with the extension direction of the guide channel 240. When the locking member 300 moves toward the positioning seat 100, the first locking assembly and the second locking assembly are connected. Conversely, when the locking member 300 moves away from the positioning seat 100, the first locking assembly and the second locking assembly are separated.

[0054] The locking member 300 includes a sliding hole, which is sleeved on the outer side of the guide block 200 and can slide relative to the guide block 200 .

[0055] The sliding hole can play a role of fixing and guiding. The locking member 300 is sleeved on the outer side of the guide block 200, and the locking member 300 can slide relative to the guide block 200 along the extension direction of the sliding hole.

[0056] Furthermore, the locking member 300 and the guide block 200 are correspondingly provided with limiting structures, and the limiting structures are used to prevent the locking member 300 from rotating relative to the guide block 200.

[0057] like Figure 5 As shown, the limiting structure may include a guide column 320 provided on the locking member 300 and extending inward, and also include a slide groove 220 provided on the guide block 200 and extending along the front-to-back direction. The guide column 320 slides in the slide groove 220. Under the stop of the side wall of the slide groove 220, the locking member 300 can only move forward and backward and cannot rotate, thereby making the operation stability of the locking member 300 better.

[0058] like Figure 2 As shown, the first locking assembly includes a blocking needle 310, and the second locking assembly includes a plurality of locking slots 150 sequentially arranged along the swinging direction.

[0059] In this embodiment, the stopper pin 310 can be provided on the front face of the locking block, while multiple slots 150 are provided on the rear face of the positioning base 100. These slots 150 are spaced apart along the swing direction of the guide block 200. To facilitate accurate deflection angle determination, a scale corresponding to each slot 150 is marked on the positioning base 100. In this embodiment, there can be five slots 150, corresponding to deflections of 0°, 2°, 4°, 6°, 8°, and 10° for the guide channel 240, respectively. Increasing the size of the guide block 200 can achieve an adjustable angle of 1°.

[0060] Furthermore, in order to make the marks on the positioning seat 100 clearer, the marks can be engraved in the form of opposite side markings, that is, 0°, 4°, and 8° can be engraved on one side of the positioning seat 100, and 2°, 6°, and 10° can be engraved on the other side of the positioning seat 100. This avoids crowding of marks and allows each mark to have enough space for engraving.

[0061] The guide block 200 includes a front small-diameter portion and a rear large-diameter portion. The first locking assembly includes: a hollow locking member 300 having a front small-diameter cavity, a middle medium-diameter cavity, and a rear large-diameter cavity, wherein the outer diameter of the small-diameter portion matches the small-diameter cavity, and the outer diameter of the large-diameter portion matches the large-diameter cavity; and an elastic reset member, the front end of which abuts against the step between the small-diameter cavity and the middle-diameter cavity, and the rear end of which abuts against the step between the small-diameter portion and the large-diameter portion, so that the locking member 300 has a tendency to move toward the second locking assembly. Figure 4As shown, the elastic return member may include a spring 400. The stepped surface between the small-diameter cavity and the medium-diameter cavity in the locking member 300 forms a first stop surface 330, while the stepped surface between the small-diameter portion and the large-diameter portion on the guide block 200 forms a second stop surface 230. The first stop surface 330 and the second stop surface 230 are spaced apart in the front-to-back direction, and the spring 400 abuts between the first stop surface 330 and the second stop surface 230. When the mechanism is in its natural state, driven by the spring 400, the locking member 300 is pushed toward the positioning seat 100, thereby connecting the first locking unit and the second locking unit. The elastic return member provides the locking member 300 with an automatic reset function. After the doctor releases the locking member 300, the locking member 300 can automatically move toward the second locking assembly, thereby locking the guide block 200 with the positioning seat 100.

[0062] like Figure 3 As shown, the positioning base 100 is provided with a handle 500 for the doctor to grasp the fixing mechanism. The handle 500 is detachably connected to the positioning base 100 and can be provided with a screw structure. The positioning base 100 is provided with a left assembly hole and a right assembly hole. The left assembly hole and the right assembly hole are both threaded holes, corresponding to the shoulder joints, respectively. During left and right shoulder surgeries, the handle 500 is installed on the left and right sides through a threaded connection. The positioning base 100 is marked with "L" representing the left side and "R" representing the right side to facilitate the doctor to adjust the direction of the handle 500. During use, the doctor adjusts the position of the handle 500 according to whether the tissue to be treated is located on the left or right side of the human body during the operation.

[0063] The left and right mounting holes are located symmetrically on opposite sides of the through hole 110 and are inclined toward each other from back to front. From front to back, the handle 500 is tilted outward, at an angle of 20°-30° relative to the reference line, to minimize interference with the surgical procedure.

[0064] The positioning seat 100 is provided with viewing holes 160 penetrating the front and rear surfaces. The number of viewing holes 160 can be multiple to provide more visual fields for surgery.

[0065] The front end surface of the positioning seat 100 can be a curved surface 170. The front end of the positioning seat 100 adopts the curved surface 170 design. The curved surface of the human glenoid fossa is usually 38-46 mm, and the curved surface 170 design can better fit the glenoid fossa.

[0066] Example 2

[0067] like Figure 7-Figure 9As shown, the difference from Example 1 is that in this embodiment, the first limiting portion is a step 610, and the second limiting portion is a protrusion 620 protruding outward. The step 610 limits the rearward movement of the protrusion 620. The step 610 acts as a stop, and the protrusion 620 cannot pass over the step 610, that is, the guide block 200 cannot be pulled out of the positioning seat 100, thereby preventing the positioning seat 100 and the guide block 200 from separating.

[0068] The same operation as in Example 1 is performed by pulling the locking member 300 backward to separate the stopper pin 310 from the locking slot 150, thereby allowing the guide block 200 to swing. When unlocking the guide block 200 from the positioning seat 100, the mutual abutment between the step 610 and the protrusion 620 prevents the guide block 200 from separating from the positioning seat 100, thereby smoothly completing the unlocking and locking operations.

[0069] Specifically, a mounting seat is provided on the back of the positioning seat 100, the mounting seat being connected to the through hole 110. A mounting portion is provided at the front end of the guide block 200, and the guide channel 240 extends through the mounting portion. The mounting portion is located within the mounting seat. The first limiting portion includes a step 610 provided on the inner wall of the mounting seat and extending toward the interior of the mounting seat. The second limiting portion includes a protrusion 620 provided on the side wall of the mounting portion and protruding outward. The step 610 is provided behind the protrusion 620. When the guide block 200 is subjected to a backward pulling force, the protrusion 620 and the step 610 abut against each other, and the step 610 prevents the protrusion 620 from moving backward, thereby preventing the guide block 200 from separating from the positioning seat 100.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide needle guiding mechanism, characterized in that: include: A positioning seat, which is provided with through holes penetrating the front and rear surfaces; a guide block, which is disposed at the proximal end of the positioning seat and has a guide channel running through the front and back, wherein the guide channel is configured to swing around the front end of the through hole; a locking structure provided on the guide block and the positioning seat to fix the guide channel at a desired position; a handle, the front end of which is coupled to the positioning seat at an angle; The locking structure comprises: a first locking assembly resettably disposed on the guide block, and A second locking assembly is provided on the positioning seat, wherein: When the first locking assembly is combined with the second locking assembly, the guide block is fixed to the positioning seat; When the first locking assembly is separated from the second locking assembly, the rear end of the guide block can swing around the front end of the through hole along the axial surface of the positioning seat.

2. The guide needle guiding mechanism according to claim 1, characterized in that: Also included is a limit mechanism comprising: A first limiting portion provided on the positioning seat, and The second limiting portion is provided on the guide block and matches the first limiting portion, wherein One of the first limiting portion and the second limiting portion is a position-limiting portion, and the other is a swinging portion; The limiting portion extends along the axial surface of the positioning seat, and the swinging portion slides on the limiting portion and is restricted from moving backward by the limiting portion.

3. The guide needle guiding mechanism according to claim 2, characterized in that: include: A mounting seat is arranged behind the positioning seat, a front end of which is communicated with the through hole, and the guide block is at least partially arranged in the mounting seat; Wherein, the inner wall of the mounting seat includes a first limiting edge and a second limiting edge arranged along the axial surface of the positioning seat, and the front ends of the two are close to each other.

4. The guide needle guiding mechanism according to claim 3, characterized in that: The first limiting portion is arranged on the inner wall of the mounting seat, and the second limiting portion is arranged on the outer side of the guide block.

5. The guide needle guiding mechanism according to claim 4, characterized in that: The limiting portion is a strip-shaped hole arranged on both sides of the inner wall of the mounting seat, and the swing portion is a swing shaft matched and arranged in the strip-shaped hole.

6. The guide needle guiding mechanism according to claim 4, characterized in that: The first limiting portion is a step; the second limiting portion is a protrusion protruding outward, and the step limits the protrusion from moving backward.

7. The guide needle guiding mechanism according to claim 2, characterized in that: The guide block includes a front small-diameter portion and a rear large-diameter portion. The first locking assembly comprises: A hollow locking member having a front small-diameter cavity, a middle medium-diameter cavity, and a rear large-diameter cavity, wherein the outer diameter of the small-diameter portion matches the small-diameter cavity, and the outer diameter of the large-diameter portion matches the large-diameter cavity; And an elastic reset member, the front end of which is abutted against the step between the small diameter cavity and the middle diameter cavity, and the rear end of which is abutted against the step between the small diameter part and the large diameter part, so that the locking member has a tendency to move toward the second locking assembly.

8. The guide needle guiding mechanism according to claim 7, characterized in that: The locking member and the guide block are provided with corresponding limiting structures, and the limiting structures are used to prevent the locking member from rotating relative to the guide block.

9. The guide needle guiding mechanism according to claim 1, wherein: The first locking assembly includes a blocking needle, and the second locking assembly includes a plurality of slots arranged along the swinging direction of the guide block.

10. The guide needle guiding mechanism according to claim 9, characterized in that: An indicating scale is provided near the clamping slot to indicate the angle between the guide channel and the axis of the positioning seat.

11. The guide needle guiding mechanism according to claim 1, characterized in that: The through hole is arranged at the center of the positioning seat and is smaller at the front and larger at the back along the swing direction of the guide block.

12. The guide needle guiding mechanism according to claim 1, wherein: A left assembly hole and a right assembly hole are symmetrically provided on the positioning seats on both sides of the through hole, and the handles are detachably connected to the left and right assembly holes respectively.

13. The guide needle guiding mechanism according to claim 12, characterized in that: The left and right assembly holes approach each other from rear to front.

14. The guide needle guiding mechanism according to claim 1, wherein: A penetrating viewing window hole is provided on the positioning seat above the through hole.

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