CN109692031B - Locking structure and puncture outfit using same - Google Patents

Abstract

The invention discloses a locking structure and a puncture outfit, which are used for selectively connecting a first part and a second part and comprise: the first clamping structure is arranged on the first component and comprises a first cantilever and a second cantilever, and the first cantilever and the second cantilever extend downwards; the limiting structure is arranged on the first component and extends downwards from the first component, and the limiting structure is provided with a sliding groove; the second clamping structure is arranged on the second part, corresponds to the first clamping structure and comprises a third cantilever; the locking structure is partially combined in the second part, corresponds to the limiting structure and is provided with a sliding block; when the locking structure is in a locking state, the sliding block is accommodated in the sliding groove, and the first cantilever and the second cantilever stop the third cantilever; the locking structure is in an unlocked state, the sliding block moves out of the sliding groove, and the first cantilever, the second cantilever and the third cantilever are separated from each other.

Description

Locking structure and puncture outfit using same

Technical Field

The present invention relates to a laparoscopic surgical instrument, and more particularly, to a puncture instrument having a locking structure for use in laparoscopic surgery.

Background

In abdominal cavity examination, abdominal cavity operation and other minimally invasive or surgical operations, a puncture outfit is an indispensable surgical instrument. The puncture instrument may establish an access channel in the abdominal wall of the body for the entry of a stapler or other surgical instrument (e.g., endoscope, scissors, guide wire, catheter, filter, stent, etc.) into the abdominal cavity and provide a passage for the ingress and egress of gas to control the pneumoperitoneum required for the procedure to be performed for examination or surgical procedures.

In laparoscopic surgery, surgical instruments enter a human body through a channel provided by a disposable puncture outfit and cut focus tissues, the cut focus tissues are generally required to be taken out through a sleeve of the puncture outfit after the surgery is finished, a shell and a conversion cap are arranged at the top of the sleeve of the conventional puncture outfit, and sealing gaskets are respectively arranged in the shell and the conversion cap, wherein the caliber of the conversion cap is generally small, so that a doctor is difficult to take out the focus tissues from inside to outside in the surgery process, and the operation is influenced.

In order to solve the problems, the connection mode of the shell and the conversion cap of the existing puncture outfit is improved, the shell and the conversion cap are selectively connected through a rotary locking mechanism, and when lesion tissues need to be taken out, the conversion cap is detached from the shell, so that the lesion tissues are conveniently taken out. The rotary locking structure comprises an extension arm, a locking ring and an elastic piece, the extension arm extends from the conversion cap towards the shell, and the extension arm comprises a clamping groove; the locking ring is positioned in the shell and can rotate around the central shaft of the shell, the locking ring comprises a clamping block, and the clamping block corresponds to the clamping groove; the elastic piece is abutted to one end of the locking ring so that the locking ring is maintained at the locking position; when the position is locked, the extension arm enters the shell from the open groove of the shell, and the clamping block enters the clamping groove, so that the conversion cap and the shell are mutually fixed; when the locking position is not locked, the locking ring rotates around the central shaft of the shell, the clamping block is separated from the clamping groove, and the shell can be detached and converted. The locking ring needs to be squeezed by the elastic piece in the process of rotating around the central shaft of the shell, the elastic force of the elastic piece enables the locking ring to be prone to deviating, the locking ring is not smooth to rotate, and the rotating locking structure cannot be smoothly switched between the locking state and the non-locking state.

In view of the above, the present invention provides a new locking structure and a puncture outfit using the same, so as to overcome the problem that the conventional rotation locking structure is easy to cause abnormal rotation.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a novel locking structure and a puncture outfit using the same, wherein the locking structure cancels the existing rotary locking ring and overcomes the problem that the rotary locking ring is easy to deviate. The invention is realized by the following technical scheme:

the present invention provides a latch structure for selectively connecting a first member to a second member, the latch structure comprising: at least one first clamping structure arranged on the first component, wherein each first clamping structure comprises a first cantilever and a second cantilever, and the first cantilever and the second cantilever extend downwards; at least one limiting structure arranged on the first component and extending downwards from the first component, wherein each limiting structure is provided with a sliding groove; the at least one second clamping structure is arranged on the second component, the at least one second clamping structure corresponds to the at least one first clamping structure one by one, and each second clamping structure comprises a third cantilever; at least one locking structure, which is partially combined in the second part, wherein the at least one locking structure corresponds to the at least one limiting structure one by one, and each locking structure is provided with a sliding block; when the locking structure is in a locking state, the sliding block is accommodated in the sliding groove, and the first cantilever and the second cantilever stop the third cantilever; when the locking structure is in an unlocked state, the sliding block is moved out of the sliding groove, and the first cantilever, the second cantilever and the third cantilever are separated from each other.

As an optional technical solution, the first component has a first surface, the first engaging structure is disposed on the first surface and extends downward, two ends of the first cantilever are respectively connected to the first surface and the second cantilever, an extending direction of the first cantilever is intersected with an extending direction of the second cantilever, and the connection includes fixed connection and integral molding.

As an optional technical solution, the first cantilever and the second cantilever are perpendicular to each other to form an L-shaped hook.

As an optional technical solution, at least one position-limiting structure is disposed on the first surface and extends downward, each position-limiting structure includes a first positioning protrusion and a second positioning protrusion disposed in parallel and at an interval, and the sliding groove is located between the first positioning protrusion and the second positioning protrusion.

As an optional technical solution, at least one accommodating groove is disposed in the second component, the at least one accommodating groove corresponds to the at least one first engaging structure one to one, each third cantilever is disposed in each accommodating groove, and at least one wall of the third cantilever is combined to a groove wall of the corresponding accommodating groove.

As an optional technical solution, the first component is a conversion cap, and the conversion cap comprises a conversion cap upper cover and a conversion cap lower cover; the second component is a shell, the shell comprises a shell upper cover and a shell lower cover, the shell upper cover is located between the conversion cap lower cover and the shell lower cover, the shell upper cover comprises a second surface and a third surface which are opposite to each other, the second surface is adjacent to the conversion cap, and at least one locking structure is combined on the third surface.

As an optional technical solution, each locking structure further includes a pressing body and a pushing portion, the pressing body and the sliding block are respectively disposed on the first side surface and the second side surface of the pushing portion, and the pressing body is pressed to move the sliding block out of the sliding groove.

As an alternative solution, the pressing body has a top surface, and the slider protrudes out of the top surface.

As an optional technical solution, the second component includes a sidewall, the sidewall surrounds the second surface and the third surface of the second component, which are opposite to each other, and the sidewall protrudes from the third surface, the sidewall has at least one opening, and the at least one opening corresponds to the at least one locking structure one to one; each locking structure further comprises a pressing body and a pushing part, the pushing part and the sliding block are located on the inner side of the side wall, and the pressing body is exposed out of the corresponding opening part and located on the outer side of the side wall.

As an optional technical solution, each locking structure further includes a stopping portion, at least one stopping portion corresponds to the at least one locking structure one to one, and each stopping portion includes a baffle plate extending downward from the third surface.

As an optional technical solution, each locking structure further includes an elastic member, and two ends of the elastic member respectively abut against the baffle and the abutting portion.

As an optional technical solution, a first protrusion is disposed on the baffle, a second protrusion is disposed on the pushing portion, the second protrusion is opposite to the first protrusion, and two opposite ends of the elastic member are respectively sleeved on the first protrusion and the second protrusion.

As an optional technical solution, a through hole is provided in the second member, the through hole is located between the opening portion and the baffle, and the slider may be located in the through hole.

As an optional technical scheme, the elastic piece is a spring or a zigzag elastic piece.

As an optional technical solution, when the first component is located above the second component, the first component rotates in an anticlockwise direction to achieve the engagement between the at least one first engaging structure and the at least one second engaging structure, or the first component rotates in a clockwise direction to achieve the engagement between the at least one first engaging structure and the at least one second engaging structure.

The invention provides a puncture outfit, which comprises a conversion cap, a shell and a locking structure, wherein the locking structure is the locking structure, the first part is the conversion cap, the second part is the shell, and the locking structure enables the conversion cap to be selectively connected with the shell.

As an alternative solution, the conversion cap includes a conversion cap lower cover, the housing includes a housing upper cover, the first component is the conversion cap lower cover, the second component is the housing upper cover, and the latching structure enables the conversion cap lower cover to be selectively connected with the housing upper cover.

The invention provides a puncture outfit, which comprises a handle part of a puncture core, a conversion cap and a locking structure, wherein the locking structure is the locking structure, the first part is the handle part of the puncture core, and the second part is the conversion cap.

The invention provides a locking structure and a puncture outfit using the same, wherein when the locking structure is in a locking state, a first clamping structure and a second clamping structure are clamped with each other, and a sliding block of a locking structure is accommodated in a sliding groove of a limiting structure, so that a conversion cap is fixedly connected with a shell; when the locking structure is in a non-locking state, the first clamping structure and the second clamping structure are separated from each other, and the sliding block of the locking structure slides out of the sliding groove of the limiting structure, so that the conversion cap is detached from the shell. Compared with the prior art, the locking structure is different from the design of the existing extension wall and the locking ring, and the locking structure in the locking structure moves along a straight line in the moving process, so that the moving stability is improved, and the problem that the selective connection between the conversion cap and the shell is abnormal due to the deviation of the locking structure is solved.

Drawings

Fig. 1A is a schematic view of a conversion cap and a housing of the puncture instrument of the present invention.

Fig. 1B is an exploded view of the conversion cap and housing of the puncture instrument of the present invention.

Fig. 2A and 2B are schematic views of the bottom cover of the conversion cap of fig. 1 from different viewing angles.

Fig. 2C is an enlarged schematic view of a dotted line portion in fig. 2A.

Fig. 3A and 3B are schematic views of the upper cover of the housing in fig. 1 from different viewing angles.

Fig. 4A and 4B are schematic views of the locking structure in fig. 1 from different viewing angles.

Fig. 5A and 5B are schematic diagrams of the locking structure and the housing upper cover combined at different viewing angles.

Fig. 6A to 6E are schematic assembly diagrams of the lower cover of the conversion cap and the upper cover of the housing in fig. 1B.

Fig. 7 is an enlarged schematic view of the region a in fig. 6C.

Fig. 8 is an enlarged schematic view of the region B in fig. 6E.

Detailed Description

1 below, embodiments of the invention are described in detail, examples of which are shown in the accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The embodiments described below with reference to the drawings are illustrative and are intended to be illustrative of the invention and should not be construed as limiting the invention.

3 the up and down directions related to the technical features in the following description are based on the up and down directions in fig. 1A and 1B, in fig. 1A, the conversion cap 101 is located above the housing 102, and in fig. 1B, the conversion cap upper cover 10, the conversion cap lower cover 20, the housing upper cover 30, and the housing lower cover 40 are arranged in sequence from top to bottom. The orientation of some of the components of the present invention in some of the figures differs from that of figures 1A and 1B only for ease of construction.

FIG. 1 is an exploded view of the transfer cap and housing of the puncture instrument of the present invention; FIG. 2 is a schematic view of the lower cover of the transfer cap of FIG. 1; FIGS. 3A and 3B are schematic views of the housing cover of FIG. 1 from different perspectives; FIGS. 4A and 4B are schematic views of the locking structure of FIG. 1 from different viewing angles; fig. 5A and 5B are schematic diagrams of the locking structure and the housing upper cover combined at different viewing angles.

As shown in fig. 1A and 1B, the present invention provides a locking structure and a puncture device 100 using the same, wherein the puncture device 100 includes a conversion cap 101, a housing 102, a cannula (not shown) and a puncture core (not shown), the conversion cap 101, the housing 102 and the cannula are connected in sequence, and the puncture core is inserted and contained in the conversion cap 101, the housing 102 and the cannula in sequence. One end of the shell 102 is selectively connected with the conversion cap 101 through a locking structure, specifically, the shell upper cover 30 of the shell 102 is selectively connected with the conversion cap lower cover 20 of the conversion cap 101 through a locking structure, and the other end of the shell 102 opposite to the shell is fixedly connected with the sleeve; preferably, the housing 102 is integrally formed with the sleeve. In minimally invasive surgery, one end of the cannula is fixed after extending to a proper position in the abdominal cavity of a patient, and a surgical instrument and a passage for the gas needed for maintaining stable pneumoperitoneum are provided.

Continuing to refer to fig. 1A and 1B, the conversion cap 101 includes an upper conversion cap cover 10 and a lower conversion cap cover 20, and a first sealing gasket is disposed in the first opening 103 of the lower conversion cap cover 20 for providing a sealing function; the combination manner of the conversion cap upper cover 10 and the conversion cap lower cover 20 and the combination manner of the first gasket and the conversion cap lower cover 20 are respectively known in the art, and the connection can be performed by referring to the existing connection manner. The housing 102 includes a housing upper cover 30 and a housing lower cover 40, and a second gasket is disposed in the second opening 104 of the housing upper cover 30 for providing a sealing function, wherein the combination manner of the housing upper cover 30 and the housing lower cover 40 and the combination manner of the second gasket and the housing upper cover 30 are respectively known in the art, and the connection manner can be performed with reference to the existing connection manner. In this embodiment, the lower housing cover 40 further includes an air inlet 41, and the air inlet 41 is connected to an air injection valve (not shown) to provide a pneumoperitoneum passage for air to enter the abdominal cavity during operation.

7 the present invention will focus on the latching mechanism and how the selective connection between the housing 102 and the transfer cap 101 is achieved. The meaning of selectively linked is: when the locking structure is in a locking state, the first part and the second part are fixedly connected; the first member is removable from the second member when the latch mechanism is in the unlocked condition. Wherein the first part is a conversion cap 101 and the second part is a housing 102. Alternatively, the first component is the stem of the piercing core and the second component is the transfer cap 101.

As shown in fig. 1A to fig. 2C, the conversion cap lower cover 20 has a first surface 21, the first surface 21 faces the housing upper cover 30, the locking structure includes at least one first engaging structure 22 and at least one limiting structure 23, the at least one first engaging structure 22 and the at least one limiting structure 23 are respectively disposed on the first surface 21, and the at least one first engaging structure 22 and the at least one limiting structure 23 respectively extend from the first surface 21 toward the housing upper cover 30 (or the housing 102), i.e., extend downward. In this embodiment, the number of the at least one first engaging structure 22 is, for example, four, and the four first engaging structures 22 are uniformly arranged on the first surface 21, wherein the first surface 21 is, for example, a circular ring shaped surface, and the four first engaging structures 22 are uniformly arranged on the circular ring shaped surface, but not limited thereto. In other embodiments of the present invention, when the number of the at least one first engaging structure 22 is two or more, the first engaging structures may be non-uniformly arranged on the first surface 21. It is understood that the uniform arrangement means that the included angle between any adjacent first engaging structures 22 is equal, and the non-uniform arrangement means that the included angle between all adjacent first engaging structures 22 includes non-equal condition.

With reference to fig. 2A to fig. 2C, each first engaging structure 22 includes a first cantilever 221 and a second cantilever 222, two ends of the first cantilever 221 are respectively connected to the first surface 21 and the second cantilever 222, the first cantilever 221, the second cantilever 222 and the first surface 21 form a first engaging space, a first inclined surface 223 is disposed at a first end of the second cantilever 222 away from the first cantilever 221, the first inclined surface 223 is used for guiding the second engaging structure 32 (as shown in fig. 3A) to enter the first engaging space, and the first cantilever 221 and the second cantilever 222 stop the second engaging structure 32 together. In this embodiment, the first suspension arm 221 and the second suspension arm 222 are perpendicular to each other to form an L-shaped hook.

Each of the position-limiting structures 23 of 10 includes a first positioning protrusion 231 and a second positioning protrusion 232, the first positioning protrusion 231 and the second positioning protrusion 232 are parallel and spaced apart from each other, so that a sliding slot 233 is formed between the first positioning protrusion 231 and the second positioning protrusion 232, and the sliding slot 233 is used for providing a sliding space for the sliding block 54 of the locking structure 50 (as shown in fig. 4A).

11 as shown in fig. 1B and fig. 3A to 3B, the housing upper cover 30 has a second surface 31 and a third surface 34 opposite to each other, and after the conversion cap lower cover 20 is connected to the housing lower cover 40, the second surface 31 is opposite to the first surface 21. The locking structure further includes at least one second engaging structure 32, the at least one second engaging structure 32 is disposed on the second surface 31, and the at least one second engaging structure 32 corresponds to the at least one first engaging structure 22 one to one, that is, the arrangement of the at least one second engaging structure 32 on the second surface 31 corresponds to the arrangement of the at least one first engaging structure 22 on the first surface 21. In this embodiment, the number of the at least one second engaging structure 32 is four, and the four second engaging structures 32 are uniformly arranged on the second surface 31, wherein the second surface 31 is, for example, a circular ring shaped surface, and the four second engaging structures 32 are uniformly arranged around the circular ring shaped surface, but not limited thereto. In other embodiments of the present invention, when the number of the at least one second engaging structure 32 is two or more, the at least one second engaging structure may be non-uniformly arranged on the second surface 21.

Referring to fig. 3A and 3B, the at least one receiving groove 33 is disposed on the housing top cover 30, the at least one receiving groove 33 corresponds to the at least one second engaging structure 32 one by one, and preferably, the at least one receiving groove 33 is a through groove that penetrates the third surface 34 from the second surface 31. Each second engaging structure 32 includes a third suspending arm 321, the third suspending arm 321 is located in the corresponding accommodating groove 33, and an end wall of one end of the third suspending arm 321 is combined on the groove wall corresponding to the accommodating groove 33, in this embodiment, a side wall of the third suspending arm 321 adjacent to the end wall is combined on the groove wall corresponding to the accommodating groove 133 adjacent to the groove wall, or the third suspending arm 321 is, for example, an extension arm extending from at least one groove wall of the accommodating groove 33, and the extension arm makes the width of the accommodating groove 33 smaller.

13 the upper surface of the third suspending arm 321 is flush with the second surface 31 of the housing cover 30, or the upper surface of the third suspending arm 321 is slightly lower than the second surface 31 of the housing cover 30, so that the third suspending arm 31 is received in the corresponding receiving groove 33. In addition, a second end of the third cantilever 321 suspending in the accommodating groove 33 is provided with a second inclined surface 322, the second end is the other end opposite to the end of the third suspending wall 321 combined with the groove wall of the accommodating groove 33, the second inclined surface 322 and the first inclined surface 223 are guided with each other, so that the third cantilever 321 easily enters the first engaging space formed by the first engaging structure 22 and the first surface 21, the first engaging structure 22 and the second engaging structure 32 are engaged with each other, and the first cantilever 221 and the second cantilever 222 commonly stop the third cantilever 321.

14 in this embodiment, a corresponding receiving groove 33 is disposed on the housing top cover 30, and the receiving groove 33 can be used to provide a receiving space required by the first engaging structure 22 before and after the first engaging structure 22 and the second engaging structure 32 are combined; meanwhile, during the rotation of the first engaging structure 22, the accommodating groove 33 can guide the first engaging structure 22 to move toward the second engaging structure 32.

15 the housing top cover 30 has a sidewall 35, the sidewall 35 surrounds the second surface 31 and the third surface 34, and the sidewall 35 extends downward from the third surface 34 toward the housing bottom cover 40, the extending portion of the sidewall 35 has at least one opening portion 351, and the locking structure 50 (shown in fig. 4A and 5A) enters the interior of the housing 102 through the opening portion 351. In the embodiment, the number of the at least one opening 351 is one, but not limited thereto. In other embodiments of the present invention, the number of the at least one opening 351 is two or more.

16 corresponds to the opening 351, at least one stopping portion 37 is disposed on the third surface 34 of the upper case cover 30, the at least one stopping portion 37 corresponds to the at least one locking structure 50, and the stopping portion 37 extends downward from the third surface 34 toward the lower case cover 40. The stopper portion 37 includes a shutter 371 and a first protrusion 372 provided on the shutter 371, the first protrusion 372 being located on a surface of the shutter 371 on a side facing the opening 351. In this embodiment, the baffle 371 is, for example, a U-shaped baffle.

17 referring to fig. 3B, the housing upper cover 30 further includes a through hole 36, the through hole 36 is disposed between the opening portion 351 and the stopping portion 37, the through hole 36 is a through hole penetrating through the second surface 31 and the third surface 34, in the embodiment, the through hole 36 is a quadrilateral hole, but not limited thereto. As can be seen from fig. 5A and 5B, the through hole 36 is used to provide a passage for the slider 54 of the locking structure 50 to be combined with the limiting structure 23, that is, the locking structure 50 is combined on the third surface 34 of the housing upper cover 30, the slider 54 of the locking structure 50 enters the sliding slot 233 of the limiting structure 23 from the through hole 36, and the first limiting protrusion 231 and the second limiting protrusion 232 limit the rotation of the slider 54 in the horizontal direction.

As shown in fig. 4A to 5B, the locking structure further includes at least one locking structure 50, the at least one locking structure 50 is combined with the housing 102 (as shown in fig. 1A), the at least one locking structure 50 is in one-to-one correspondence with the at least one opening 351, and the at least one locking structure 50 is in one-to-one correspondence with the at least one limiting structure 23. The puncture instrument 100 shown in fig. 1A is provided with only one locking structure 50, but not limited thereto. In other embodiments of the present invention, the number of the at least one locking structure 50 is, for example, 2, which are symmetrically combined on the housing 102.

19 each locking structure 50 includes a pressing body 51, a pushing portion 52, a second protrusion 53 and a slider 54, wherein the pushing portion 52 has a first side surface and a second side surface opposite to each other, the pressing body 51 is disposed on the first side surface, the second protrusion 53 and the slider 54 are located on the second side surface, the pressing body 51 has a top surface 511 and a bottom surface 512 opposite to each other, the top surface 511 faces the third surface 34 upward, the bottom surface 521 faces the housing lower cover 40 downward, the slider 54 is connected to the pushing portion 52 near the top of the top surface 511, and the slider 54 protrudes above the top surface 511, that is, the slider 54 protrudes out of the top surface 511, wherein the top surface of the top of the pushing portion 52 is flush with the top surface 511. The locking structure 50 is assembled into the puncture instrument 100, the top of the pushing portion 52 is lower than the first bottom of the first positioning protrusion 231 and the second bottom of the second positioning protrusion 232, the first bottom and the second bottom are respectively far away from the first surface 21, the first bottom of the first positioning protrusion 231 and the second bottom of the second positioning protrusion 231 do not extend from the through hole 36 and are lower than the third surface 34, so as to prevent the pushing portion 52 and the top surface 511 from interfering with the first positioning protrusion 231 and the second positioning protrusion 232 of the limiting structure 23 during the moving process. The projection of the slider 54 out of the top surface 511 comprises: the slider 54 is disposed on the top surface 511 and protrudes upward, or the slider 54 is disposed on a side wall of the top of the abutting portion 52 and protrudes upward beyond the upper surface of the top of the abutting portion 52, i.e., the top surface 511.

As can be seen from fig. 1A and fig. 5A to fig. 5B, the locking structure 50 is assembled in the housing 102, the pushing portion 52 is located inside the sidewall 35, and the pressing body 51 is located outside the sidewall 35 via the opening 351, or the pushing portion 52 is located inside the housing 102, and the pressing body 51 is located outside the housing 102. In order to avoid the locking structure 50 from being disengaged from the opening 351, the opening 351 has a first width W1, the pressing body 51 of the locking structure 50 has a second width W2, the abutting portion 52 has a third width W3, the first width W1 is greater than or equal to the second width W2, and the first width W1 is smaller than the third width W3.

21 with continued reference to fig. 5A and 5B, the locking structure 50 is interconnected with the stop 37 on the third surface 34 of the housing cover 30 by the resilient member 60. The elastic element 60 is, for example, a spring, two opposite ends of the spring are respectively sleeved on the first protrusion 372 and the second protrusion 53, the second protrusion 53 is disposed in the middle area of the second side surface of the pushing portion 52, preferably, the spring between the first protrusion 372 and the second protrusion 53 is in a compressed state, and two ends of the spring compressed by the spring respectively elastically abut against the pushing portion 52 and the baffle 371, so as to prevent the spring from loosening from the first protrusion 372 and the second protrusion 53. Of course, the present invention is not limited to the elastic element 60 being a spring, and in other embodiments of the present invention, the elastic element 60 may also be a Z-shaped elastic sheet, in which case, the two opposite ends of the Z-shaped elastic sheet are fixedly connected to the first protrusion 372 and the second protrusion 53, respectively, or the two opposite ends of the Z-shaped elastic sheet are fixedly connected to the baffle 371 and the pushing portion 52, respectively, that is, in the embodiment where the elastic sheet structure is used as the elastic element 60, the first protrusion 372 and the second protrusion 53 are not necessarily designed structures. The elastic member 60 is mainly used for providing an elastic force, so that the sliding block 54 can be automatically reset under the action of the elastic force, and the convenience and stability of assembling and disassembling the conversion cap 101 and the housing 102 are improved.

22 as shown in fig. 5B, the locking structure 50 is incorporated into the housing upper cover 30, and the slider 54 protrudes from the through hole 36; when the housing 102 is combined with the converting cap 101, the sliding block 54 protruding from the through hole 36 can enter the sliding slot 233 of the limiting structure 23, thereby limiting the rotation of the converting cap 101 relative to the housing 102 in the horizontal direction.

23 as can be seen from the above description, the locking structure for selectively connecting the converting cap 101 and the housing 102 of the puncture device 100 provided by the present invention substantially includes at least one first engaging structure 22, at least one limiting structure 23, at least one second engaging structure 32 and at least one locking structure 50, wherein the at least one first engaging structure 22 is disposed on the converting cap 101 and extends from the converting cap 101 toward the housing 102; the at least one second engaging structure 32 is disposed in the housing 102, and the at least one second engaging structure 32 corresponds to the at least one first engaging structure 22 one by one; the at least one locking structure 50 is combined in the shell 102, and the at least one locking structure 50 corresponds to the at least one limiting structure 23 one by one; each first engaging structure 22 includes a first suspension arm 221 and a second suspension arm 222; each limiting structure 23 comprises a sliding groove 233; each second engaging structure includes a third cantilever 321; each locking structure 50 includes a slider 54; when the locking structure is in the locked state, the slider 54 is locked in the sliding slot 233, and the first suspension arm 221 and the second suspension arm 222 stop the third suspension arm 321; when the locking structure is in the unlocked state, the sliding block 54 of the locking structure 50 slides out of the sliding slot 233 of the limiting structure 23, and the first suspension arm 221, the second suspension arm 222 and the third suspension arm 321 are separated from each other.

Fig. 6A to 6E are schematic assembly views of the conversion cap lower cover 20 and the housing upper cover 30 in fig. 1B; FIG. 7 is an enlarged schematic view of region A in FIG. 6C; fig. 8 is an enlarged schematic view of the region B in fig. 6E. As shown in fig. 1A, the conversion cap upper cover 10 and the conversion cap lower cover 20 are pre-assembled into the conversion cap 101, the case upper cover 30 and the case lower cover 40 are pre-assembled into the case 102, and the conversion cap 101 and the case 102 are selectively connected by a locking structure. Since the locking structure is mainly combined with the conversion cap lower cover 20 and the housing upper cover 30, the conversion cap upper cover 10 and the housing lower cover 40 are omitted for more clearly illustrating the process of fixedly connecting and disconnecting the conversion cap 101 and the housing 102.

Generally, the conversion cap upper cover 10 and the conversion cap lower cover 20 are assembled in advance to form the conversion cap 101, the housing upper cover 30 and the housing lower cover 40 are assembled in advance to form the housing 102, and the housing 102 and the sleeve (not shown) are fixedly connected in advance. Wherein, the fixed connection between the conversion cap 101 and the housing 102 is performed before the cannula of the puncture outfit 100 is inserted into the abdominal cavity of the patient, in other words, the fixed connection between the conversion cap 101 and the housing 102 is completed before the puncture outfit 100 leaves the factory, and during the operation, the conversion cap 101 and the housing 102 maintain the fixed connection state; only when the focal tissue needs to be taken out, the conversion cap 101 and the shell 102 are detached to facilitate the taking out of the focal tissue, and considering that the cannula still remains on the abdominal cavity of the patient at this time, the shell 102 and the cannula are kept fixed for the purpose of relieving the discomfort of the patient, firstly, acting force is applied to the locking structure 50 to separate the sliding block 54 and the limiting structure 23 from each other so as to release the rotation limitation of the conversion cap 101 and the shell 102 in the horizontal direction; then, the conversion cap 101 is rotated along the central axis of the conversion cap 101 to separate the first engaging structure 22 and the second engaging structure 32 from each other, so as to release the restriction of the vertical direction between the conversion cap 101 and the housing 102, thereby separating the conversion cap 101 and the housing 102 from each other. However, before the puncture instrument 100 is inserted into the abdominal cavity of the patient, after applying a force to the locking structure 50, the conversion cap 101 and the housing 102 may be fixedly connected or disconnected, and the conversion cap 101 and/or the housing 102 may be rotated along the central axis of the conversion cap 101 and/or the central axis of the housing 102, respectively.

26 the selective connection between the conversion cap 101 and the housing 102 of the present invention is mainly realized by a locking structure, wherein at least one first engaging structure 22 and at least one limiting structure 23 of the locking structure are disposed on the conversion cap lower cover 20, and at least one second engaging structure 20 and at least one locking structure 50 of the locking structure are disposed in the housing upper cover 30, and the following description focuses on the matching manner among the first engaging structure 22, the limiting structure 23, the second engaging structure 20, and the locking structure 50, and describes in detail the selective connection between the conversion cap 101 and the housing 102.

27 as shown in fig. 1A and fig. 6A, when assembling the conversion cap 101 to the housing 102, first, the locking structure 50 is integrated into the housing 102, the operator holds the housing 102, applies a force to the pressing body 51 along the direction shown by the arrow F1, the pressing body 51 moves toward the inner side of the side wall 35 in the opening 351, the pushing part 52 presses the elastic element 60, and the elastic element 60 is compressed, so that the slider 54 moves toward the central axis of the housing upper cover 30 in the through hole 36 of the housing upper cover 30 along the direction shown by the arrow F1; the elastic element 60 disposed between the pushing portion 52 and the baffle 371 is compressed to a compressed state 60'. According to the invention, the locking structure 50 moves along a straight line under the action of external force, and the locking structure 50 can be regarded as moving linearly; compared with the curve-type movement, the linear movement of the locking structure 50 of the invention is more stable, and the problem of movement track deviation is not easy to occur.

As shown in fig. 6B and 6C, when the conversion cap lower cover 20 is assembled to the housing upper cover 30, the pressing body 51 is maintained in the state shown in fig. 6A, and the conversion cap lower cover 20 and the housing upper cover 30 are dislocated from each other, and each first engaging structure 22 on the first surface 21 of the conversion cap lower cover 20 is assembled to the corresponding receiving groove 33 of the housing upper cover 30, at this time, the limiting structure 23 on the first surface 21 of the conversion cap lower cover 20 and the sliding block 54 of the locking structure 50 are dislocated from each other, or the sliding block 54 is not aligned with the limiting structure 23.

Continuing to refer to fig. 6D and 6E, the lower cover 20 of the conversion cap shown in fig. 6C is rotated around the central axis of the conversion cap 101 along the first direction, so that the first engaging structure 22 is further moved in the receiving groove 33 along the first direction, and the second engaging structure 32 enters the first engaging space of the first engaging structure 22, preferably, the first engaging structure 22 and the second engaging structure 32 are in interference fit; the first inclined surface 223 and the second inclined surface 322 are guided to each other, so that the second engaging structure 32 can smoothly enter the first engaging space. When the first engaging structure 22 and the second engaging structure 32 are combined with each other, the limiting structure 23 is rotated to a position aligned with the sliding block 54, the limiting structure 23 enters the through hole 36, the elastic element 60 returns to the initial state from the compressed state 60' and generates an elastic force, the elastic force simultaneously acts on the pushing portion 52 and the blocking portion 371, since the blocking portion 371 is disposed on the third surface 34 and cannot move, and the pushing portion 52 is pushed by the elastic force to move toward the side wall 35, and the sliding block 54 moves along the direction opposite to the direction indicated by the arrow F1 in fig. 6A, the sliding block 54 slides into the sliding groove 233 of the limiting structure 23, the sliding block 54 stays in the sliding groove 233 (as shown in fig. 8), the pushing portion 52 abuts against the side wall 35, since the third width W3 of the pushing portion 52 is greater than the first width W1 of the opening 351, the pushing portion 52 abuts against the inner side wall 35 by the elastic force, the slide block 54 is received in the sliding slot 233, and the slide block 54 is limited by the first positioning protrusion 231 and the second positioning protrusion 232 on both sides of the sliding slot 233, so as to limit the rotation of the conversion cap lower cover 20 relative to the housing upper cover 30 in the horizontal direction. Further, after the first engaging structure 22 and the second engaging structure 32 are combined, the first suspension arm 221 and the second suspension arm 222 limit the third suspension arm 321 together, that is, the displacement in the vertical direction after the conversion cap lower cover 20 and the housing upper cover 30 are combined is limited by the first engaging structure 22 and the second engaging structure 32. The conversion cap lower cover 20 and the housing upper cover 30 are assembled, the sliding block 54 is matched with the limiting structure 23, and the first clamping structure 22 is matched with the corresponding second clamping structure 32, so that the locking structure is in a locking state.

30 the conversion cap 101 is removed from the housing 102, and the removal process can be performed in a reverse manner to that described above. Specifically, taking the structure in fig. 6D or fig. 6E as an example, the pressing body 51 of the locking structure 50 is pressed, so that the pressing body 51 moves from the opening portion 351 of the side wall 35 toward the inner side of the side wall 35, the pushing portion 52 presses the elastic member 60, the elastic member 60 is compressed, and is compressed from the initial state to the compressed state 60', the pushing portion 52 moves toward the stopping portion 37 and drives the slider 54 to slide out of the sliding slot 233 and move toward the stopping portion 37, and after the slider 54 slides out of the sliding slot 233, that is, after the limit of the horizontal direction of the slider 54 by the limiting structure 23 is removed, the conversion cap lower cover 20 is rotated around the central axis of the conversion cap 101 (shown in fig. 1A) along the second direction, so that the first engaging structure 22 and the second engaging structure 32 are separated from each other (shown in fig. 6C), wherein the first direction is opposite to the second direction. After the first engaging structure 22 and the second engaging structure 32 are separated, the limitation of the first engaging structure 22 on the vertical direction of the second engaging structure 32 is eliminated, so that the conversion cap lower cover 20 and the housing upper cover 30 can be separated from each other. After the conversion cap lower cover 20 and the housing upper cover 30 are completely disassembled, the sliding block 54 slides out of the limiting structure 23 and the first clamping structure 22 and the corresponding second clamping structure 32 are separated from each other, so that the locking structure is in an unlocked state.

31 because the conversion cap 101 is selectively connected with the shell 102, during or after the operation, when the doctor removes the foreign body such as the excised lesion tissue from the proximal end of the puncture instrument (the proximal end is defined as the side of the cannula close to the doctor) by detaching the conversion cap 101, the excised foreign body such as the lesion tissue can be removed only through the second sealing gasket without the first sealing gasket, thereby facilitating the removal of the tissue sample and reducing the damage of the tissue sample during the removal process. .

32 referring to fig. 1A and the assembling process and the disassembling process, the first engaging structure 22 of the conversion cap lower cover 20 (or the conversion cap 101) and the second engaging structure 32 of the housing upper cover 30 (or the housing 102) can be engaged with each other by rotating the conversion cap lower cover 20 (or the conversion cap 101) around the central axis of the conversion cap 101 along a first direction, for example, a counterclockwise direction; while, for example, the conversion cap lower cover 20 (or the conversion cap 101) is rotated in a second direction, for example, a clockwise direction, the first engaging structure 22 of the conversion cap lower cover 20 (or the conversion cap 101) and the second engaging structure 32 of the housing upper cover 30 (or the housing 102) can be detached, but not limited thereto. In other embodiments of the invention, the first direction may be, for example, a clockwise direction and the second direction may be, for example, a counterclockwise direction. During the assembly and disassembly process of the conversion cap lower cover 20 and the housing upper cover 30, the first direction and the second direction are generally determined by the relative position relationship between the at least one first engaging structure 22 on the first surface 21 of the conversion cap lower cover 20 and the at least one second engaging structure 32 on the second surface 31 of the housing upper cover 30, wherein when the second cantilever 222 of the first engaging structure 22 extends along the circular ring-shaped surface (the first surface 21) in the counterclockwise direction and the third cantilever 321 of the second engaging structure 32 extends along the circular ring-shaped surface (the second surface) in the clockwise direction, the conversion cap lower cover 20 is rotated counterclockwise to assemble the conversion cap lower cover 20 to the housing upper cover 30, and the conversion cap lower cover 20 is rotated clockwise to disassemble the conversion cap lower cover 20 from the housing upper cover 30; when the second cantilever 222 of the first engaging structure 22 extends clockwise along the circular ring-shaped surface (the first surface 21) and the third cantilever 321 of the second engaging structure 32 extends counterclockwise along the circular ring-shaped surface (the second surface), the conversion cap lower cover 20 is rotated clockwise so that the conversion cap lower cover 20 is assembled to the housing upper cover 30, and the conversion cap lower cover 20 is rotated counterclockwise so that the conversion cap lower cover 20 is disassembled from the housing upper cover 30. It should be noted that, during the process of rotating the conversion cap lower cover 20 relative to the housing upper cover 30, the pressing body 51 of the locking structure 50 is always in a pressing state, i.e., the slider 54 is not received in the sliding slot 233.

In an embodiment of the present invention, preferably, the at least one first engaging structure 22 is integrally formed with the conversion cap lower cover 20, and the at least one second engaging structure 32 is integrally formed with the housing upper cover 30, and can be formed by injection molding.

In summary, the invention provides a locking structure and a puncture outfit using the same, when the locking structure is in a locked state, the first clamping structure and the second clamping structure are clamped with each other, and a sliding block of the locking structure is accommodated in a sliding groove of the limiting structure, so that the conversion cap is fixedly connected with the housing; when the locking structure is in a non-locking state, the first clamping structure and the second clamping structure are separated from each other, and the sliding block of the locking structure slides out of the sliding groove of the limiting structure, so that the conversion cap is detached from the shell. Compared with the prior art, the locking structure of the invention is different from the design of the existing extension wall and the locking ring, and the locking structure in the locking structure moves along a straight line in the moving process, so that the moving stability is improved, and the problem of abnormity of selective connection of the conversion cap and the shell caused by the deviation of the locking structure is avoided.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (18)

1. A latch structure for selectively connecting a first member to a second member, the latch structure comprising:

at least one first clamping structure arranged on the first component, wherein each first clamping structure comprises a first cantilever and a second cantilever, and the first cantilever and the second cantilever extend downwards;

at least one limiting structure arranged on the first component and extending downwards from the first component, wherein each limiting structure is provided with a sliding groove;

the at least one second clamping structure is arranged on the second component, the at least one second clamping structure corresponds to the at least one first clamping structure one by one, and each second clamping structure comprises a third cantilever; and

at least one locking structure, which is partially combined in the second part, wherein the at least one locking structure corresponds to the at least one limiting structure one by one, and each locking structure is provided with a sliding block;

when the locking structure is in a locking state, the sliding block is accommodated in the sliding groove, and the first cantilever and the second cantilever stop the third cantilever; when the locking structure is in an unlocked state, the sliding block is moved out of the sliding groove, and the first cantilever, the second cantilever and the third cantilever are separated from each other.

2. The locking structure of claim 1, wherein the first member has a first surface, the first engaging structure is disposed on the first surface and extends downward, two ends of the first arm are respectively connected to the first surface and the second arm, an extending direction of the first arm intersects an extending direction of the second arm, and the connecting includes a fixed connection and an integral molding.

3. The latch structure according to any of claims 1 and 2 wherein the first arm and the second arm are perpendicular to each other to form an L-shaped hook.

4. The locking structure of claim 2, wherein at least one limiting structure is disposed on the first surface and extends downward, each limiting structure includes a first positioning protrusion and a second positioning protrusion disposed in parallel and spaced apart from each other, and the sliding groove is disposed between the first positioning protrusion and the second positioning protrusion.

5. The locking structure of claim 1, wherein at least one receiving groove is disposed in the second member, the at least one receiving groove corresponds to the at least one first engaging structure one to one, each third cantilever is disposed in each receiving groove, and at least one wall of the third cantilever is bonded to a wall of the corresponding receiving groove.

6. The latch structure of claim 1 wherein the first member is a transition cap comprising a transition cap upper cover and a transition cap lower cover; the second component is a shell, the shell comprises a shell upper cover and a shell lower cover, the shell upper cover is located between the conversion cap lower cover and the shell lower cover, the shell upper cover comprises a second surface and a third surface which are opposite to each other, the second surface is adjacent to the conversion cap, and at least one locking structure is combined on the third surface.

7. The locking structure according to any one of claims 1 and 6, wherein each locking structure further comprises a pressing body and a pushing portion, the pressing body and the sliding block are respectively disposed on a first side surface and a second side surface of the pushing portion, and the sliding block is moved out of the sliding slot by pressing the pressing body.

8. The latching structure of claim 7 wherein the pressing body has a top surface and the slider projects from the top surface.

9. The locking structure of claim 1, wherein the second member includes a sidewall surrounding second and third opposing surfaces of the second member, the sidewall protruding from the third surface, the sidewall having at least one opening, the at least one opening corresponding to the at least one locking structure; each locking structure further comprises a pressing body and a pushing part, the pushing part and the sliding block are located on the inner side of the side wall, and the pressing body is exposed out of the corresponding opening part and located on the outer side of the side wall.

10. The locking structure of claim 9, wherein each locking structure further comprises a stop, at least one stop corresponding to the at least one locking structure, each stop comprising a baffle extending downward from the third surface.

11. The locking structure of claim 10, wherein each locking structure further comprises an elastic member, and two ends of the elastic member respectively abut against the blocking plate and the abutting portion.

12. The locking structure of claim 11, wherein the baffle has a first protrusion, the pushing portion has a second protrusion opposite to the first protrusion, and opposite ends of the elastic member are respectively sleeved on the first protrusion and the second protrusion.

13. The locking structure of claim 10, wherein a through hole is provided in the second member, the through hole being located between the opening and the blocking plate, the slider being located in the through hole.

14. A latch construction according to any one of claims 11 and 12 wherein the resilient member is a spring or a zigzag spring.

15. The locking structure of claim 1, wherein when the first member is positioned over the second member, the first member rotates in a counterclockwise direction to engage the at least one first engaging structure with the at least one second engaging structure, or rotates in a clockwise direction to engage the at least one first engaging structure with the at least one second engaging structure.

16. A puncture instrument comprising a transfer cap, a housing, and a latch structure, wherein the latch structure is the latch structure of any one of claims 1-15, the first member is the transfer cap, the second member is the housing, and the latch structure selectively connects the transfer cap to the housing.

17. The puncture instrument of claim 16, wherein the conversion cap comprises a conversion cap lower cover, the housing comprises a housing upper cover, the first member is a conversion cap lower cover, the second member is a housing upper cover, and the latch structure selectively couples the conversion cap lower cover to the housing upper cover.

18. A puncture instrument comprising a puncture core handle, a conversion cap and a locking structure, wherein the locking structure is the locking structure of any one of claims 1 to 15, the first member is the puncture core handle, and the second member is the conversion cap.

Images