Needle placing pen and puncture outfit

Abstract

The invention provides a needle placing pen and a puncture outfit, and relates to the technical field of medical instruments.The needle placing pen comprises a holding front end and a position control rear end, the holding front end is connected with the position control rear end, and an installation channel used for installing a puncture suite is formed between the holding front end and the position control rear end; a mounting structure is arranged on the surface, facing the mounting channel, of the rear end face of the control position and used for being detachably connected with a puncture suite. The needle placing pen provided by the invention can be repeatedly used, only the puncture suite needs to be replaced after the operation is finished, the operation cost is reduced and the environmental burden is reduced while the safe and effective use is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a needle placement pen and a puncture device. Background Art

[0002] In ophthalmic surgery, a puncture device is an indispensable precision instrument, mainly used for complex operations such as anterior chamber puncture, vitreous cutting, and retinal surgery. These surgeries usually require establishing a stable access channel through the puncture device so that surgical instruments such as vitrectomy heads, illumination optical fibers, laser optical fibers, etc. can smoothly enter the eye for operation.

[0003] Existing ophthalmic puncture devices are mostly designed for single - use. The main purpose of this design is to avoid the infection risk brought by multiple uses, thereby improving the safety of the surgery. However, although single - use puncture devices solve the infection problem to a certain extent, they also lead to a significant increase in cost. In addition, the disposal of a large number of single - use medical devices also burdens the environment. Summary of the Invention

[0004] The purpose of the present invention is to provide a needle placement pen and a puncture device, which can reduce the surgical cost and environmental burden while ensuring safe and effective use.

[0005] To achieve the above - mentioned purpose, the present invention provides the following technical solutions: In a first aspect, the present invention provides a needle placement pen, including a front holding end and a rear position - controlling end. The front holding end is connected to the rear position - controlling end. An installation channel for installing a puncture kit is formed between the front holding end and the rear position - controlling end. An installation structure is provided on the surface of the rear position - controlling end facing the installation channel, and the installation structure is used for detachably connecting with the puncture kit.

[0006] In an optional embodiment, the front holding end includes a housing, a lifting cylinder, and a pressing cylinder; The lifting cylinder is connected to the rear position - controlling end and the lifting cylinder is provided with a track groove; One end of the pressing cylinder extends into the lifting cylinder and has a guide post that slidably cooperates with the track groove, and the other end extends out of the lifting cylinder and has a pressing flap; One end of the housing is rotatably sleeved outside the lifting cylinder and the pressing flap, and the other end has a converging cavity. The inner wall of the housing has a spiral groove that cooperates with the guide post. The spiral groove and the track groove are configured to drive the pressing flap of the pressing cylinder to approach or move away from the converging cavity when the lifting cylinder rotates relative to the housing, so as to converge or open the pressing flap.

[0007] In an alternative embodiment, the track groove has an extension portion extending in a direction parallel to the axis of the lifting cylinder, and a guiding port communicating with the extension portion is formed in the end face of the lifting cylinder.

[0008] In an alternative embodiment, a clamping groove is recessed in the inner wall of the housing. Along the axial direction of the housing, the clamping groove is located between the folding cavity and the spiral groove, and the lifting cylinder is provided with a protrusion that is rotationally matched with the clamping groove.

[0009] In an alternative embodiment, the position control rear end includes a push rod, a needle placing rod, and a position control cylinder; The position control cylinder is connected to the holding front end; One end of the needle placing rod extends into the position control cylinder and is connected to the position control cylinder, and the other end extends out of the position control cylinder. The needle placing rod is provided with the mounting structure; One end of the push rod extends into the position control cylinder and is sleeved outside the needle placing rod, and the other end extends out of the position control cylinder and is used to push the puncture kit. The push rod is slidably matched with the position control cylinder along the axial direction of the position control cylinder.

[0010] In an alternative embodiment, the mounting structure includes a rib buckle protruding from the inner wall of the needle placing rod.

[0011] In an alternative embodiment, the position control cylinder is provided with a guiding groove along its own axial direction, and a plurality of position control holes are recessed in the inner wall of the position control cylinder and are distributed at intervals along the axial direction of the position control cylinder; One end of the push rod extending into the position control cylinder has a shaft head and a position control post connected to the shaft head. The shaft head extends out of the guiding groove and is slidably matched with the guiding groove along the extending direction of the guiding groove. The position control post is configured to be clamped with any one of the position control holes.

[0012] In an alternative embodiment, the position control rear end includes a ranging cap, and the ranging cap is connected to the position control cylinder.

[0013] In an alternative embodiment, a protective cap is further included, and the protective cap is buckled on the holding front end.

[0014] In a second aspect, the present invention provides a puncture device, including a puncture kit and a needle placing pen as described in any one of the foregoing embodiments. The puncture kit is inserted into the installation channel and is detachably connected to the installation structure.

[0015] The needle placing pen and the puncture device provided by the present invention can achieve the following beneficial effects: Compared with the prior art, the needle placing pen provided by the present invention can be reused. After the operation is completed, only the puncture kit needs to be replaced, which ensures the safety and effectiveness of use while reducing the surgical cost and the environmental burden.

[0016] The trocar provided by the second aspect of the present invention has the needle placement pen provided by the first aspect of the present invention, and thus has all the beneficial effects of the needle placement pen provided by the first aspect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a three-dimensional structure diagram of a needle placement pen provided by an embodiment of the present invention; Figure 2 is a longitudinal sectional view of a needle placement pen provided by an embodiment of the present invention; Figure 3 is a partial cross-section of a needle placement pen provided by an embodiment of the present invention when inserting a puncture kit Figure 1 ; Figure 4 is a three-dimensional structure diagram of a front end of a grip provided by an embodiment of the present invention; Figure 5 is a longitudinal sectional view of a front end of a grip provided by an embodiment of the present invention; Figure 6 is a three-dimensional structure diagram of a top abutment cylinder provided by an embodiment of the present invention; Figure 7 is a three-dimensional structure diagram of a screw-lifting cylinder provided by an embodiment of the present invention; Figure 8 is a longitudinal sectional view of a housing provided by an embodiment of the present invention; Figure 9 is a partial cross-section of a needle placement pen provided by an embodiment of the present invention when inserting a puncture kit Figure 2 ; Figure 10 is a three-dimensional structure diagram of a position control rear end provided by an embodiment of the present invention; Figure 11 is a longitudinal sectional view of a position control rear end provided by an embodiment of the present invention; Figure 12 is a three-dimensional structure diagram of a needle placement rod provided by an embodiment of the present invention; Figure 13 is a three-dimensional structure diagram of a push rod provided by an embodiment of the present invention; Figure 14 is a three-dimensional structure diagram of a position control cylinder provided by an embodiment of the present invention; Figure 15 A partial cross-sectional view of a needle placement pen provided by an embodiment of the present invention when being inserted into a puncture kit Figure 3 ; Figure 16 for Figure 15 A local enlarged schematic diagram of point A; Figure 17 A schematic diagram of a three-dimensional structure of a ranging cap provided by an embodiment of the present invention; Figure 18 A front view of a distance measuring cap provided by an embodiment of the present invention Figure 1 ; Figure 19 A front view of a distance measuring cap provided by an embodiment of the present invention Figure 2 ; Figure 20 A schematic diagram of the structure of a distance measuring cap provided by an embodiment of the present invention when in use; Figure 21 A partial cross-sectional view of a needle placement pen provided by an embodiment of the present invention when being inserted into a puncture kit Figure 4 ; Figure 22 A schematic diagram of a partial three-dimensional structure of an acupuncture pen provided by an embodiment of the present invention when the acupuncture pen is inserted into a puncture kit; Figure 23 An exploded view of a trocar provided by an embodiment of the present invention; Figure 24 A partial cross-sectional view of a trocar provided in an embodiment of the present invention.

[0019] Icons: 1-grip front end; 11-housing; 111-closing cavity; 112-spiral groove; 113-buckle groove; 12-spin-up cylinder; 121-track groove; 1211-extension part; 1212-first limit part; 1213-second limit part; 122-guide port; 123-protrusion; 124-buckle hole; 13-top cylinder; 131-guide column; 132-top petal; 1321-butt part; 2-control rear end; 21-push rod; 211-shaft head ; 212-position control column; 213-guide hole; 214-notch; 22-needle rod; 221-installation structure; 23-position control cylinder; 231-guide groove; 232-position control hole; 233-buckle; 24-distance measuring cap; 241-scale point; 2411-first scale point; 2412-second scale point; 2413-third scale point; 3-puncture kit; 31-puncture needle; 32-self-closing cannula; 33-needle seat; 331-ring groove; 4-protective cap. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0024] An embodiment of the first aspect of the present invention is to provide a needle placement pen, as Figures 1 to 3 shown, including a front holding end 1 and a rear position control end 2. The front holding end 1 is connected to the rear position control end 2. An installation channel for installing a puncture kit 3 is formed between the front holding end 1 and the rear position control end 2. An installation structure 221 is provided on the surface of the rear position control end 2 facing the installation channel, and the installation structure 221 is used for detachably connecting with the puncture kit 3.

[0025] When the needle placement pen provided by the embodiment of the first aspect of the present invention is in use, the puncture kit 3 can be installed in the installation channel through the installation structure 221, and the user can perform surgical operations. After the operation is completed, the connection between the puncture kit 3 and the installation structure 221 can be cancelled. When using it next time, a new puncture kit 3 can be inserted into the installation channel and connected to the installation structure.

[0026] Therefore, the above-mentioned needle placement pen can be reused. After the operation, only the puncture kit 3 needs to be replaced, which ensures safe and effective use while reducing the surgical cost and environmental burden.

[0027] Among them, there are various detachable connection methods between the installation structure 221 and the puncture kit 3. For example, the installation structure 221 is snap-connected to the puncture kit 3, or the installation structure 221 is thread-connected to the puncture kit 3, etc.

[0028] In an alternative embodiment, for the convenience of the user's operation, the installation structure 221 and the puncture kit 3 adopt a snap-connection method. For example, the installation structure 221 is a convex structure, and a card slot is recessed on the outer surface of the puncture kit 3. The connection between the two is achieved through the snap connection of the convex and the card slot. Of course, it is also possible that the installation structure 221 includes a card slot, and the outer surface of the puncture kit 3 has a convex structure that is snap-connected to the card slot.

[0029] For the convenience of introducing the usage process of the holding front end 1 and the position control rear end 2 in the following paragraphs, the structure of the puncture kit 3 will be specifically described first: As Figure 3 shown, the puncture kit 3 includes a puncture needle 31, a self-sealing sleeve 32, and a needle seat 33. One end of the puncture needle 31 is the needle tip, and the other end is connected to the needle seat 33. A plurality of self-sealing sleeves 32 are configured, and the plurality of self-sealing sleeves 32 are sequentially sleeved on the outside of the puncture needle 31 along the length direction of the puncture needle 31.

[0030] During the operation, the needle tip of the puncture needle 31 can penetrate into the interior of the eyeball. As the puncture needle 31 extends, the outermost self-sealing sleeve 32 on the puncture needle 31 enters the eyeball first. Then, the puncture needle 31 is withdrawn. The self-sealing sleeve 32 will remain in the eyeball under the resistance given by the eyeball, establishing a stable access channel for surgical instruments. Repeating this process, each self-sealing sleeve 32 can be left in the eyeball.

[0031] It can be understood that the above-mentioned "distal end" refers to the end of the puncture needle 31 far from the operator, and the "proximal end" in the following text is the end of the puncture needle 31 close to the operator.

[0032] To prevent the self-sealing sleeve 32 from falling off the puncture needle 31 under the action of gravity, the self-sealing sleeve 32 has a silicone cap, and the silicone cap has a slit for the puncture needle 31 to pass through. The slit prevents the self-sealing sleeve 32 from falling off the puncture needle 31 through the squeezing action, and at the same time, the slit does not give the puncture needle 31 a large squeezing force, so that the self-sealing sleeve 32 can remain in the eyeball under the resistance applied by the eyeball.

[0033] In addition, the needle seat 33 can be detachably connected to the installation structure 221. When the installation structure 221 is a convex structure, a card slot for snap-connecting with the convex is recessed on the outer surface of the needle seat 33.

[0034] The structure of the grip front end 1 is described in detail below: In an optional embodiment, if Figures 4 to 8 As shown, the grip front end 1 includes a housing 11, a rotating cylinder 12 and a top cylinder 13, wherein: One end of the rotary cylinder 12 is connected to the position control rear end 2, and the other end of the rotary cylinder 12 is provided with a track groove 121; One end of the push-up tube 13 extends into the spiral cylinder 12 and has a guide column 131. The guide column 131 can extend into the track groove 121 and slide with the track groove 121. The other end of the push-up tube 13 extends out of the spiral cylinder 12 and has a push-up petal 132. One end of the housing 11 is rotatably sleeved on the outside of the spiral cylinder 12 and the top abutment petal 132 , and the other end has a retracting cavity 111 . The inner wall of the housing 11 has a spiral groove 112 that cooperates with the guide column 131 .

[0035] When in use, the spiral cylinder 12 is rotated relative to the shell 11, and the guide column 131, under the guidance of the spiral groove 112 and the track groove 121, will make the top cylinder 13 approach or move away from the gathering chamber 111. In the process of approaching the gathering chamber 111, the top abutting petal 132 gradually contacts with the gathering chamber 111 and is squeezed by the gathering chamber 111. In the process of moving away from the gathering chamber 111, the top abutting petal 132 gradually separates from the gathering chamber 111 and opens without the squeezing of the gathering chamber 111.

[0036] The above-mentioned holding front end 1 can realize the folding and opening of the top flap 132 by rotating the lifting cylinder 12. In the opened state, the puncture kit 3 can extend from the top flap 132 into the installation channel and connect with the installation structure 221. At the same time, Figure 9 As shown, during the operation, the self-closing cannula 32 in the puncture kit 3 can also extend from the top flap 132; in the retracted state, the end surface of the top flap 132 can contact the end surface of the farthest self-closing cannula 32, and provide support for the self-closing cannula 32 during the process of the self-closing cannula 32 entering the eyeball, so as to prevent the self-closing cannula 32 from retreating toward the proximal end. In this way, the above-mentioned holding front end 1 can not only realize the movement of the next self-closing cannula 32 toward the distal end after the previous self-closing cannula 32 is reserved in the eyeball, but also realize the support force provided to the next self-closing cannula 32 when the next self-closing cannula 32 enters the eyeball.

[0037] Among them, Figure 6 As shown, the top abutment petal 132 includes a plurality of petal bodies, and the plurality of petal bodies are evenly spaced and distributed around the axis of the top abutment cylinder 13, as shown in FIG. Figure 5 As shown, the closer to the left end of the top abutting petal 132, the closer the distance between the petal body and the axis of the top abutting cylinder 13 is, and there is a V-shaped gap between two adjacent petals. The closer to the left end of the petal body, the larger the V-shaped gap is. Figure 5, along the axial direction of the housing 11, the outer diameter dimensions of the cross-sections of the converging cavity 111 are different. The closer to the left end face of the housing 11, the smaller the outer diameter dimension of the cross-section of the converging cavity 111, so that the closer the abutting flap 132 is to the left end face of the housing 11, the greater the degree of convergence.

[0038] As Figure 5 shown, the end of the flap body protrudes outwardly with an abutting portion 1321. During the process of the abutting cylinder 13 moving leftward, the abutting portion 1321 can make the abutting flap 132 more easily converge under the limitation of the converging cavity 111.

[0039] In an alternative embodiment, to facilitate the guiding post 131 to enter the track groove 121, as Figure 7 shown, the end face of the lifting cylinder 12 is provided with a guiding port 122 communicating with the track groove 121.

[0040] During use, the guiding post 131 can enter the track groove 121 through the V-shaped guiding port 122 at the front end of the lifting cylinder 12, and then rotate into the inner cavity of the housing 11 through the cooperation of the guiding post 131 and the spiral groove 112.

[0041] Specifically, as Figure 7 shown, the shape of the guiding port 122 can be V-shaped. The closer to the end face of the lifting cylinder 12, the larger the opening of the guiding port 122, so as to facilitate the guiding post 131 to enter the guiding port 122. At the end of the guiding port 122 far from the end face of the lifting cylinder 12, the opening dimension of this end is slightly smaller than the dimension of the guiding post 131 to prevent the guiding post 131 from disengaging from the guiding port 122.

[0042] In an alternative embodiment, as Figure 7 shown, the track groove 121 has an extension portion 1211 extending along a direction parallel to the axis of the lifting cylinder 12, so that when the lifting cylinder 12 rotates, the abutting cylinder 13 can move along a direction parallel to the axis of the lifting cylinder 12, gradually approaching or departing from the converging cavity 111.

[0043] It is set that, as Figure 7 shown, the left end of the extension portion 1211 is the termination point of the track groove 121, and the right end of the extension portion 1211 is the starting point of the track groove 121.

[0044] Specifically, as Figure 7 shown, the track groove 121 further includes a first limiting portion 1212 and a second limiting portion 1213. The first limiting portion 1212 communicates with the left end of the extension portion 1211, and the second limiting portion 1213 communicates with the right end of the extension portion 1211. Both the first limiting portion 1212 and the second limiting portion 1213 extend along the circumferential direction of the lifting cylinder 12 and have opposite extension directions with respect to the extension direction of the extension portion 1211.

[0045] During the use process, the lifting cylinder 12 can be made as Figure 7Rotating in the direction of the shown arrow, the guide post 131 of the abutting cylinder 13 enters the right end of the extension part 1211 from the second limiting part 1213. Under the guidance of the spiral groove 112, the guide post 131 moves along the extension part 1211 to the left end of the extension part 1211, and then enters the first limiting part 1212 and gets stuck. Similarly, rotating the abutting cylinder 13 in the reverse direction can make the guide post 131 enter the second limiting part 1213 from the first limiting part 1212 and get stuck.

[0046] In an alternative embodiment, the lifting cylinder 12 is provided with a buckling hole 124, and the buckling hole 124 can be clamped with the control rear end 2 to realize the connection with the control rear end 2.

[0047] In an alternative embodiment, as Figure 8 shown, in order to enable the lifting cylinder 12 to rotate stably relative to the outer shell 11, a buckling groove 113 is concavely provided on the inner wall of the outer shell 11. Along the axial direction of the outer shell 11, the buckling groove 113 is located between the folding cavity 111 and the spiral groove 112. As Figure 7 shown, the lifting cylinder 12 is provided with a protrusion 123 that rotatably cooperates with the buckling groove 113.

[0048] After the abutting cylinder 13 rotates into the inner cavity of the outer shell 11 under the cooperation of the guide post 131 and the spiral groove 112, through the clamping of the buckling groove 113 and the protrusion 123, the connection of the outer shell 11, the lifting cylinder 12 and the abutting cylinder 13 can be realized.

[0049] The structure of the control rear end 2 is specifically described as follows: In an alternative embodiment, as Figures 10 to 14 shown, the control rear end 2 includes a push rod 21, a needle placing rod 22 and a control cylinder 23, where: A buckle 233 can be provided on the outer wall of the control cylinder 23, and the buckle 233 is clamped with the buckling hole 124 on the lifting cylinder 12; One end of the needle placing rod 22 extends into the control cylinder 23 and is connected to the control cylinder 23, and the other end extends out of the control cylinder 23. An installation structure 221 is provided on the inner wall of the needle placing rod 22; One end of the push rod 21 extends into the control cylinder 23 and is sleeved outside the needle placing rod 22, and the other end extends out of the control cylinder 23 and is used to push the puncture kit 3. The push rod 21 is axially slidably matched with the control cylinder 23 along the control cylinder 23.

[0050] During use, the needle seat 33 can extend into the needle placing rod 22 and be connected to the installation structure 221. Since the push rod 21 is axially slidably matched with the control cylinder 23 along the control cylinder 23, during the process of sliding the push rod 21 towards the distal end of the needle placing pen, as Figure 15 shown, when the abutting flap 132 is in the open state, the end of the push rod 21 can push the self-closing sleeve 32 at the proximal end of the puncture needle 31 towards the distal end of the puncture needle 31.

[0051] Therefore, in the above embodiments, the control rear end 2 can not only fix the needle seat 33, but also push the self-closing sleeve 32, facilitating the user's surgical operation.

[0052] In an alternative embodiment, as Figure 16 shown, the mounting structure 221 includes rib catches protruding from the inner wall of the needle placement rod 22, and the needle seat 33 is provided with an annular groove 331 for snap-fitting with the rib catches.

[0053] After the puncture kit 3 is used up, the rib catches and the annular groove 331 can be disengaged by clamping the puncture needle 31 with forceps, and the puncture kit 3 can be pulled out.

[0054] In an alternative embodiment, as Figure 13 shown, the end of the push rod is recessed with a guiding hole 213 for pushing the puncture kit 3.

[0055] In an alternative embodiment, as Figure 13 and 14 shown, the control cylinder 23 is axially provided with a guiding groove 231, and a plurality of control holes 232 are recessed in the inner wall of the control cylinder 23 at intervals along the axial direction of the control cylinder 23; one end of the push rod 21 extending into the control cylinder 23 has a shaft head 211 and a control post 212 connected to the shaft head 211, the shaft head 211 extends out of the guiding groove 231 and is slidably engaged with the guiding groove 231 along the extending direction of the guiding groove 231, and the control post 212 is configured to be snap-fitted with any one of the control holes 232.

[0056] In the above embodiments, the limit during the sliding of the push rod 21 can be realized, avoiding the sliding distance of the push rod 21 being too large or too small.

[0057] In an alternative embodiment, as Figure 13 shown, one end of the push rod 21 extending into the control cylinder 23 is provided with a notch 214, and the notch 214 is located on the side of the shaft head 211, so that when the user presses the shaft head 211, the end of the push rod 21 can be deformed, facilitating the control post 212 to disengage from the control hole 232.

[0058] In an alternative embodiment, as Figure 17 shown, the control rear end 2 includes a ranging cap 24, and the ranging cap 24 is connected to the control cylinder 23.

[0059] As Figure 17 shown, a plurality of scale points 241 are provided at one end of the ranging cap 24 away from the control cylinder 23, and the plurality of scale points 241 are used to measure or locate the incision position to help the doctor accurately puncture the sclera position.

[0060] During the operation, the incision position is usually 3 - 4 mm from the corneal limbus, as follows Figure 18 and Figure 19As shown, the measuring cap 24 provides a measuring scale distance d1 of 3 mm and a measuring scale distance d2 of 4 mm. In implementation, a plurality of scale points 241 are set, including a first scale point 2411, a second scale point 2412 and a third scale point 2413. After the scale points 241 on the measuring cap 24 leave concave points on the human eye tissue, as shown in FIG. Figure 20 As shown, the puncture needle is inserted between the second scale point 2412 and the third scale point 2413.

[0061] The following is a detailed description of the use of the needle pen. When the first puncture is completed and the second puncture is performed, the lifting cylinder 12 is rotated so that the guide column 131 moves along the spiral groove 112 to the starting point of the track groove 121, and the shaft head 211 is pressed to push the push rod 21 downward. Figure 21 As shown, at this time, the guide hole 213 pushes the self-closing sleeve 32 at the proximal end to move toward the distal end. When the control column 212 moves into the next control hole 232, the push rod 21 stops moving to complete the exit of the second self-closing sleeve 32. Then, the lifting cylinder 12 is rotated in the reverse direction, so that the guide column 131 moves along the spiral groove 112 to the end point of the track groove 121. At this time, as shown in FIG. Figure 22 As shown, the top flap 132 cooperates with the retracting cavity 111 to start to retract, and the end face of the top flap 132 contacts the end face of the silicone cap at the end of the self-closing sleeve 32, completely ejecting the self-closing sleeve 32. When performing the third puncture, the rotary cylinder 12 is rotated so that the guide column 131 moves along the spiral groove 112 to the starting point of the track groove 121. Repeating the above steps can complete the removal of the last self-closing sleeve 32. After the self-closing sleeve 32 is used, the puncture needle 31 can be clamped with tweezers to pull out the puncture kit 3.

[0062] In an optional embodiment, if Figure 23 and Figure 24 As shown, the needle placement pen also includes a protective cap 4, which is buckled on the front end 1 of the grip to protect the puncture kit 3.

[0063] An embodiment of the second aspect of the present invention provides a puncture device. The puncture device provided by the embodiment of the second aspect of the present invention includes a puncture kit 3 and the above-mentioned needle placement pen. The puncture kit 3 is inserted into the installation channel and is detachably connected to the installation structure 221.

[0064] The puncture device provided in the embodiment of the second aspect of the present invention has the needle placement pen provided in the embodiment of the first aspect of the present invention, and thus has all the beneficial effects of the needle placement pen provided in the embodiment of the first aspect of the present invention.

[0065] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 needle placement pen, characterized in that, It includes a holding front end (1) and a position control rear end (2). The holding front end (1) is connected to the position control rear end (2). An installation channel for installing a puncture kit (3) is formed between the holding front end (1) and the position control rear end (2). An installation structure (221) is provided on the surface of the position control rear end (2) facing the installation channel. The installation structure (221) is used for detachably connecting with the puncture kit (3). The holding front end (1) includes a housing (11), a lifting cylinder (12) and a pressing cylinder (13). The lifting cylinder (12) is connected to the position control rear end (2) and the lifting cylinder (12) is provided with a track groove (121). One end of the pressing cylinder (13) extends into the lifting cylinder (12) and has a guide post (131) that slidably cooperates with the track groove (121), and the other end extends out of the lifting cylinder (12) and has a pressing flap (132). One end of the housing (11) is rotatably sleeved outside the lifting cylinder (12) and the pressing flap (132), and the other end has a converging cavity (111). The inner wall of the housing (11) has a spiral groove (112) that cooperates with the guide post (131). The spiral groove (112) and the track groove (121) are configured to drive the pressing flap (132) of the pressing cylinder (13) to approach or move away from the converging cavity (111) when the lifting cylinder (12) rotates relative to the housing (11), so that the pressing flap (132) converges or expands.

2. The needle-inserting pen according to claim 1, characterized in that The track groove (121) has an extension portion (1211) extending along the direction parallel to the axis of the lifting cylinder (12). A guiding opening (122) communicating with the extension portion (1211) is provided on the end face of the lifting cylinder (12).

3. The needle placement pen according to claim 1, characterized in that, A clamping groove (113) is recessed on the inner wall of the housing (11). Along the axis of the housing (11), the clamping groove (113) is located between the converging cavity (111) and the spiral groove (112). The lifting cylinder (12) is provided with a protrusion (123) that rotatably cooperates with the clamping groove (113).

4. The needle placement pen according to claim 1, wherein, The position control rear end (2) includes a push rod (21), a needle placing rod (22) and a position control cylinder (23). The position control cylinder (23) is connected to the holding front end (1). One end of the needle placing rod (22) extends into the position control cylinder (23) and is connected to the position control cylinder (23), and the other end extends out of the position control cylinder (23). The needle placing rod (22) is provided with the installation structure (221). One end of the push rod (21) extends into the position control cylinder (23) and is sleeved outside the needle placing rod (22), and the other end extends out of the position control cylinder (23) and is used for pushing the puncture kit (3). The push rod (21) slidably cooperates with the position control cylinder (23) along the axis of the position control cylinder (23).

5. The needle-inserting pen according to claim 4, characterized in that The installation structure (221) includes rib buckles protruding from the inner wall of the needle placing rod (22).

6. The needle placement pen according to claim 4, characterized in that, The position control cylinder (23) is axially provided with a guide groove (231) along its own axis, and a plurality of position control holes (232) are recessed in the inner wall of the position control cylinder (23) and are distributed at intervals along the axis of the position control cylinder (23); One end of the push rod (21) extending into the position control cylinder (23) has a shaft head (211) and a position control column (212) connected to the shaft head (211). The shaft head (211) extends out of the guide groove (231) and is slidably engaged with the guide groove (231) along the extending direction of the guide groove (231). The position control column (212) is configured to be snap-fitted with any one of the position control holes (232).

7. The needle placement pen according to claim 4, wherein, The position control rear end (2) includes a ranging cap (24), and the ranging cap (24) is connected to the position control cylinder (23).

8. The needle placement pen according to any one of claims 1-7, characterized in that, It further includes a protective cap (4), and the protective cap (4) is buckled on the holding front end (1).

9. A trocar, characterized in that, It includes a puncture kit (3) and the needle placement pen according to any one of claims 1-8. The puncture kit (3) is inserted into the installation channel and is detachably connected to the installation structure (221).

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