Limiting and locking mechanism of puncture guiding device

Abstract

The utility model discloses a puncture guide device limiting and locking mechanism which can rotate relative to a shell of a puncture guide device between a locking position and an unlocking position and comprises a limiting mechanism arranged on a push rod of the puncture guide device and a locking mechanism installed in the shell. The locking mechanism is provided with a clamping part and an avoiding part, and the clamping part and the avoiding part are staggered in the plane perpendicular to the rotating axis of the locking mechanism. The clamping part can be located on the front side of the limiting mechanism to limit the limiting mechanism to move forwards when the locking mechanism is located at the locking position, and the avoiding part can be located on the front side of the limiting mechanism to avoid the limiting mechanism when the locking mechanism is located at the unlocking position. The limiting and locking mechanism of the puncture guiding device is used for limiting and locking the push rod, and the situation that a puncture needle is accidentally ejected out due to accidental touch is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a limiting locking mechanism for a puncture guide. Background Art

[0002] Sacrospinous ligament fixation is a surgical method used to treat pelvic organ prolapse such as uterine prolapse. It supports and fixes the prolapsed organ by suturing and fixing the sacrospinous ligament to restore its normal position and function. The sacrospinous ligament fixation puncture device is a medical device used in sacrospinous ligament fixation, which is specially designed for puncture operation in sacrospinous ligament fixation surgery. This puncture device usually has a special structure and function to help doctors accurately puncture the sacrospinous ligament during surgery and perform subsequent suturing and fixation.

[0003] Currently, the puncture guide used in sacrospinous ligament fixation surgery includes a trigger and a push rod structure. The trigger drives the push rod to pass the puncture needle through the tissue. However, most of the existing puncture guides do not have a trigger limit locking mechanism. During the operation, the operator relies on the experience of the operator to pull the trigger. If the trigger is accidentally touched due to an operational error, it may cause harm to the injured person or the operator, posing a safety hazard. Utility Model Content

[0004] In order to solve the problems of the prior art, the present application provides a puncture guide limiting and locking mechanism, which is arranged at the tail of the puncture guide and is used to limit and lock the push rod to prevent the puncture needle from being accidentally ejected due to accidental touch.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] An embodiment of the present application provides a puncture guide limit locking mechanism, which can rotate between a locked position and an unlocked position relative to the shell of the puncture guide, including a limit mechanism arranged on the push rod of the puncture guide and a locking mechanism installed inside the shell; the locking mechanism is provided with a locking portion and an avoidance portion, and the locking portion and the avoidance portion are staggered with each other in a plane perpendicular to the rotation axis of the locking mechanism, so that the locking portion can be in front of the limit mechanism when the locking mechanism is in the locked position to limit the forward movement of the limit mechanism, and the avoidance portion can be in front of the limit mechanism when the locking mechanism is in the unlocked position to avoid the limit mechanism.

[0007] As a further preferred scheme, the locking mechanism described in the embodiment of the present application includes a locking sleeve, which is arranged on the outside of the rear end of the push rod and can rotate relative to the push rod, and a limit end wall is arranged on the locking sleeve; the limit mechanism is a limit pin arranged at the rear end of the push rod and extending radially along the push rod, and the limit pin is located on the rear side of the limit end wall; the avoidance portion is a groove arranged on the inner surface of the locking sleeve, and the groove extends forward from the limit end wall so that the limit pin can move forward through the groove, and the part of the limit end wall where the groove is not arranged forms a locking portion.

[0008] As a further preferred scheme, the lock sleeve described in the embodiment of the present application is provided with two opposing and interconnected through grooves, the two through grooves extending from the inner surface to the outer surface of the lock sleeve, the limit pin includes two protrusions extending outward from both sides of the push rod, the two protrusions are located in the two through grooves, and the front end wall of the through groove forms a limit end wall.

[0009] As a further preferred solution, the arc angle of both side edges of the through groove in the circumferential direction of the locking sleeve described in the embodiment of the present application is 60 to 120°.

[0010] As a further preferred solution, in the embodiment of the present application, the axes of the two protruding columns are on the same straight line and are perpendicular to the axis of the push rod.

[0011] As a further preferred scheme, the locking mechanism described in the embodiment of the present application also includes a limiting ring fixed in the outer shell, the limiting ring sleeve is arranged on the outside of the front end of the locking sleeve, two limiting protrusions are set on the inner edge of the limiting ring, and two limiting grooves matching the limiting protrusions are set on the outer edge of the locking sleeve, and the limiting protrusions are used to be respectively clamped in the two limiting grooves when the locking mechanism is in the locking position and the unlocking position.

[0012] As a further preferred solution, the puncture guide limit locking mechanism described in the embodiment of the present application also includes a spring sleeved on the push rod, the front end of the spring abuts against the shell, and the rear end of the spring abuts against the limit pin.

[0013] As a further preferred scheme, in an embodiment of the present application, the locking mechanism includes a locking sleeve and a fixed sleeve arranged on the rear end of the push rod, the locking sleeve is arranged on the fixed sleeve, the tail end of the push rod is fixed in the fixed sleeve, a locking groove is arranged in a radial direction on the locking sleeve as a locking portion, and a sliding groove connected to the locking groove is arranged in an axial direction of the locking sleeve as the avoidance portion, and the front end of the sliding groove is open; a locking pin protruding from the outer circumferential surface of the fixing sleeve is arranged on the fixed sleeve, the locking pin is embedded in the locking groove to form a limiting mechanism, and the locking pin can slide between the locking groove and the sliding groove.

[0014] As a further preferred solution, the locking mechanism described in the embodiment of the present application further includes a knob cover which is sleeved on the outside of the lock sleeve to drive the lock sleeve to rotate, and the knob cover is sealed on the outside of the through slot.

[0015] As a further preferred scheme, the lock sleeve described in the embodiment of the present application has a convex ring extending outward from the front end, and the convex ring surface is provided with at least one notch in the axial direction, and a convex strip matching the notch is provided inside the knob cover, and the knob cover drives the lock sleeve to rotate relative to the push rod through the engagement of the notch and the convex strip.

[0016] As a further preferred solution, the outer side of the knob cover described in the embodiment of the present application is provided with a flange protruding outward for easy operation.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] 1. The puncture guide limit locking mechanism described in the embodiment of the present application can rotate relative to the housing of the puncture guide between a locked position and an unlocked position. In the locked position, the push rod is limited and locked by the mutual cooperation and conversion between the locking limit mechanism and the locking mechanism, which can effectively prevent the puncture needle from being accidentally ejected due to accidental touching, avoid accidental injury to the patient or the surgical operator, and improve the safety of the puncture guide.

[0019] 2. During use, when the puncture guide limit locking mechanism described in the embodiment of the present application rotates between the locked position and the unlocked position, a snapping sound is heard when it is rotated to the unlocked position. The operator can judge whether the puncture guide limit locking mechanism is in the locked position or the unlocked position based on the sound, which facilitates the operation of the surgical operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is an assembly effect diagram of the puncture guide limit locking mechanism described in the embodiment of the present application.

[0022] Figure 2 This is a schematic diagram of a usage state of the puncture guide limit locking mechanism described in an embodiment of the present application.

[0023] Figure 3 This is a schematic diagram of another usage state of the puncture guide limit locking mechanism described in an embodiment of the present application.

[0024] Figure 4 This is a schematic structural diagram of the puncture guide limit locking mechanism of the preferred embodiment of the present application.

[0025] Figure 5 This is a schematic structural diagram of a puncture guide limit locking mechanism described in another embodiment of the present application.

[0026] The reference numerals of the drawings are: 10, lock sleeve; 11, position limiting end wall; 12, groove; 13, through groove; 14, convex ring; 141, notch; 15, position limiting slot; 16, position slot; 17, slide slot; 20, push rod; 30, position limiting pin; 40, knob cover; 41, convex strip; 42, flange; 50, position limiting ring; 51, position limiting protrusion; fixing sleeve 60; 61, lock pin. The realization of the purpose, functional features and advantages of the present application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] like Figure 1-3As shown, an embodiment of the present application provides a puncture guide limiting locking mechanism, which can rotate between a locked position and an unlocked position relative to the housing of the puncture guide, including a limiting mechanism set on the push rod of the puncture guide and a locking mechanism installed inside the housing. In some embodiments, during the surgical suturing operation, when the locking mechanism is rotated to the unlocked position, the operator can push the push rod to move forward, and the puncture needle at the front end of the push rod can be pushed out, and the suture needle is passed through the tissue together with the suture reserved for the sacrospinous ligament to tie a knot; when the locking mechanism is rotated to the locked position, the push rod is limited and no longer moves. The locking mechanism is provided with a locking portion and an avoidance portion. In some embodiments, the locking mechanism includes a lock sleeve 10, which is sleeved on the outside of the rear end of the push rod 20 and can rotate relative to the push rod 20, and a limit end wall 11 is provided on the lock sleeve 10; the limiting mechanism is a limit pin 30 arranged at the rear end of the push rod 20 and extending radially along the push rod 20, and the limit pin 30 is located on the rear side of the limit end wall 11; the avoidance portion is a groove 12 arranged on the inner surface of the lock sleeve, and the groove 12 extends forward from the limit end wall so that the limit pin 30 can move forward through the groove 12, and the limit end wall 11 The portion without the groove 12 forms a locking portion; in this way, the locking portion and the avoidance portion can be staggered with each other in a plane perpendicular to the rotation axis of the locking mechanism. The limiting end wall as the locking portion can block the limiting pin 30 at the front side of the limiting pin 30 when the locking mechanism is in the locked position, so as to limit the limiting pin 30 from moving forward and prevent the push rod 20 from moving forward; the groove 11 as the avoidance portion can avoid the limiting pin 30 at the front side of the limiting pin when the locking mechanism is in the unlocked position, so that the limiting pin moves forward through the groove 12, thereby achieving the purpose of pushing out the push rod 20 and moving it forward. In addition, as an alternative solution, the locking portion and the avoidance groove 12 provided on the locking mechanism can be a locking portion and an avoidance portion in other structural forms, the locking portion and the avoidance portion can be staggered with each other in a plane perpendicular to the rotation axis of the locking mechanism, and the limiting mechanism is not limited to the limiting pin 30.

[0031] In some embodiments, the lock sleeve 10 is provided with a through slot 13, which extends from the inner surface of the lock sleeve 10 to the outer surface, and the stop pin 30 is a protrusion extending outward from the push rod 10, the protrusion is in the through slot 13, and the front end wall of the through slot 13 forms the stop end wall 11. Figure 2 and 3As shown, in the preferred embodiment of the present application, as a further preferred solution, the lock sleeve 10 is provided with two opposite and mutually connected through grooves 13, the two through grooves 13 penetrate from the inner surface of the lock sleeve 10 to the outer surface, the stop pin 30 includes two bosses extending outward from both sides of the push rod 10, the two bosses are in the two through grooves 13, and the front end wall of the through groove 13 forms the stop end wall 11. In this solution, the front end wall of the through groove 13 is the stop end wall 11, when the lock sleeve 10 is rotated, the boss can only swing on the two sides of the through groove 13, that is, the arc of the through groove 13 in the radial direction can control the swing angle of the boss, in some embodiments, preferably, the arc of the two sides of the through groove 13 in the circumferential (radial) direction of the lock sleeve 10 is 60-120°, and the angle of rotation of the boss is also 60-120°, specifically, for example, when the arc of the through groove 13 is 90°, the boss can rotate 90° in the through groove 13. It should be noted that, in the embodiment of the present application, the solution of providing one through slot 13 on the lock sleeve 10 can solve the problem, but from the operation point of view, the solution of providing two through slots 13 is more convenient and smoother to operate.

[0032] On the basis of the scheme of setting two through grooves on the lock sleeve, as a further optimized scheme, the axes of the two bosses on the push rod 20 are on the same straight line and perpendicular to the axis of the push rod 20, so that the angle range of the bosses rotating in the through groove 13 is consistent. On the basis of the above embodiment, in order to facilitate the operator to rotate the lock sleeve, as a further preferred scheme, the locking mechanism described in the embodiment of the present application also includes a knob cover 40 sleeved on the outside of the lock sleeve 10 to drive the lock sleeve 10 to rotate, and the knob cover 40 covers the outside of the through groove 13. In fact, the setting of the knob cover 40 not only facilitates the rotation of the lock sleeve 10, but also protects the lock sleeve 10. In some embodiments of the present application, the knob cover 40 and the lock sleeve 10 can have multiple matching modes, and the purpose of the matching is that when the knob cover 40 is rotated, the lock sleeve 10 can rotate accordingly. As a preferred solution, in a preferred embodiment of the present application, the matching solution of the knob cover 40 and the lock sleeve 10 is as follows: a convex ring 14 extends outward from the front end of the lock sleeve 10, and at least one notch 141 is provided on the surface of the convex ring 14 along the axial direction, and a convex strip 41 matching the notch 141 is provided inside the knob cover 40, and the knob cover 40 drives the lock sleeve 10 to rotate relative to the push rod 20 through the engagement of the notch 141 and the convex strip 41.

[0033] In some preferred embodiments, a flange 42 protruding outward for easy operation is provided on the outer side of the knob cover 40. The flange 42 extends outward from the knob cover 40 and can be integrally formed with the knob cover 40. The outer edge line of the flange 42 is curved to make the appearance more beautiful and the operation more convenient.

[0034] On the basis of some of the above embodiments, further, in some other embodiments of the present application, the locking mechanism further includes a limiting ring 50 fixed in the housing, the limiting ring 50 is sleeved on the front end of the lock sleeve 10, the inner edge of the limiting ring 50 is provided with two limiting protrusions 51, the outer edge of the lock sleeve 10 is provided with two limiting grooves 15 matching the limiting protrusions 51, and the limiting protrusions 51 are used to be respectively clamped in the two limiting grooves 15 when the locking mechanism is in the locking position and the unlocking position. In other schemes, the positions of the limiting protrusions and the limiting grooves can be replaced, for example, the limiting protrusions are provided on the outer edge of the lock sleeve, and the limiting grooves are provided on the inner edge of the limiting ring. Preferably, the two limit slots 15 are staggered at a circumferential angle of 90° in the locking mechanism. When the locking mechanism is in the locked position, the limit protrusion 51 is clamped in one of the limit slots 15. When the locking mechanism is in the unlocked position, the limit protrusion 51 is clamped in the other limit slot 15. The lock sleeve 10 and the limit ring 50 can be made of plastic parts. In particular, when the limit ring 50 is made of plastic parts or other deformable materials, it can deform when squeezed. The limit protrusion 51 is clamped in the limit slot 15 to limit the rotation of the locking mechanism. When the locking mechanism is not subjected to external force, it can effectively prevent the locking mechanism from rotating. When a rotational external force is applied to the locking mechanism, the lock sleeve 10 squeezes the limit protrusion 51, causing the limit ring to produce a certain deformation, thereby allowing the locking mechanism to rotate relative to the housing.

[0035] On the basis of the above embodiments, further, in some embodiments, the puncture guide limit locking mechanism also includes a spring sleeved on the push rod 20, the front end of the spring abuts against the outer shell, and the rear end abuts against the limit pin 30. The spring is used to provide an elastic stress that always pushes the limit pin 30 backward, so that the limit pin 30 is always pressed against the rear end wall of the through groove 13. The push rod 20 is reset backward by the elastic stress provided by the spring. The limit pin 30 and the rear end wall of the through groove 13 cooperate to limit the maximum displacement of the push rod 20 backward movement, thereby avoiding excessive displacement of the push rod when resetting.

[0036] like Figure 5As shown, as another embodiment of the present application, the locking mechanism includes a lock sleeve 10 and a fixed sleeve 60 sleeved on the rear end of the push rod 20, the lock sleeve 10 is sleeved on the fixed sleeve 60, the rear end of the push rod 20 is fixed in the fixed sleeve 60, a locking groove 16 is provided on the lock sleeve 10 along the radial direction as the locking part, and a slide groove 17 connected to the locking groove 16 is provided along the axial direction of the lock sleeve 10 as the avoidance part, and the front end of the slide groove 17 is open; the fixed sleeve 60 is provided with a lock pin 61 protruding from the outer peripheral surface of the fixed sleeve as a limiting mechanism, the lock pin 61 is embedded in the locking groove 16, and the lock pin 61 can slide between the locking groove 16 and the slide groove 17. Further, in this embodiment, the push rod 20 is also sleeved with a spring, and the rear end of the push rod is provided with a spring limiting protrusion, the front end of the spring abuts on the housing, and the rear end of the spring abuts on the spring limiting protrusion.

[0037] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A puncture guide limit locking mechanism, located at the rear end of the shell of the puncture guide, capable of rotating relative to the shell between a locked position and an unlocked position, characterized in that: It includes a limiting mechanism arranged on the push rod of the puncture guide and a locking mechanism installed inside the shell; the locking mechanism is provided with a locking portion and an avoiding portion, and the locking portion and the avoiding portion are staggered with each other in a plane perpendicular to the rotation axis of the locking mechanism, so that the locking portion can be in front of the limiting mechanism when the locking mechanism is in the locking position to limit the forward movement of the limiting mechanism, and the avoiding portion can be in front of the limiting mechanism when the locking mechanism is in the unlocking position to avoid the limiting mechanism.

2. The puncture guide position limiting locking mechanism according to claim 1, characterized in that: The locking mechanism includes a locking sleeve, which is sleeved on the outside of the rear end of the push rod and can rotate relative to the push rod, and a limit end wall is set on the locking sleeve; the limit mechanism is a limit pin set at the rear end of the push rod and extending radially along the push rod, and the limit pin is located on the rear side of the limit end wall; the avoidance portion is a groove set on the inner surface of the locking sleeve, and the groove extends forward from the limit end wall so that the limit pin can move forward through the groove, and the part of the limit end wall where the groove is not set forms a locking portion.

3. The puncture guide limit locking mechanism according to claim 2, characterized in that: The lock sleeve is provided with a through groove which runs through the inner surface of the lock sleeve to the outer surface. The limit pin is a convex column extending outward from the push rod. The convex column is located in the through groove, and the front end wall of the through groove forms a limit end wall.

4. The puncture guide limit locking mechanism according to claim 2, characterized in that: The lock sleeve is provided with two opposite and mutually connected through grooves, which extend from the inner surface of the lock sleeve to the outer surface. The limit pin includes two protrusions extending outward from both sides of the push rod. The two protrusions are located in the two through grooves, and the front end walls of the through grooves form limit end walls. The arc of the two side edges of the through groove in the circumferential direction of the lock sleeve is 60 to 120°.

5. The puncture guide position limiting locking mechanism according to claim 2, characterized in that: The locking mechanism also includes a limiting ring fixed in the shell, the limiting ring sleeve is arranged on the front end outside of the locking sleeve, the inner edge of the limiting ring is provided with two limiting protrusions, and the outer edge of the locking sleeve is provided with two limiting grooves matching the limiting protrusions, and the limiting protrusions are used to be respectively clamped in the two limiting grooves when the locking mechanism is in the locking position and the unlocking position.

6. The puncture guide limit locking mechanism according to claim 2, characterized in that: It also includes a spring sleeved on the push rod, the front end of the spring abuts against the shell, and the rear end of the spring abuts against the limit pin.

7. The puncture guide limit locking mechanism according to claim 3, characterized in that: The locking mechanism includes a locking sleeve and a fixed sleeve sleeved on the rear end of the push rod, the locking sleeve is sleeved on the fixed sleeve, the tail end of the push rod is fixed in the fixed sleeve, a locking groove is provided on the locking sleeve along the radial direction as a locking portion, and a sliding groove connected to the locking groove is provided along the axial direction of the locking sleeve as the avoidance portion, and the front end of the sliding groove is open; a locking pin protruding from the outer circumferential surface of the fixing sleeve is provided on the fixed sleeve, the locking pin is embedded in the locking groove to form a limiting mechanism, and the locking pin can slide between the locking groove and the sliding groove.

8. The puncture guide position limiting locking mechanism according to claim 7, characterized in that: A spring is sleeved on the push rod, and a spring limiting convex block is arranged at the rear end of the push rod. The front end of the spring abuts against the shell, and the rear end of the spring abuts against the spring limiting convex block.

9. The puncture guide position limiting locking mechanism according to claim 7, characterized in that: The locking mechanism also includes a knob cover which is sleeved on the outside of the lock sleeve to drive the lock sleeve to rotate, and the knob cover is sealed on the outside of the through slot.

10. The puncture guide position limiting locking mechanism according to claim 9, characterized in that: The front end of the lock sleeve extends outward from a convex ring, and the surface of the convex ring is provided with at least one notch in the axial direction. A convex strip matching the notch is provided inside the knob cover, and the knob cover drives the lock sleeve to rotate relative to the push rod through the engagement of the notch and the convex strip; the outer side of the knob cover is provided with a flange protruding outward for easy operation.

Images