Needle placement pen and puncture device

Abstract

The present invention provides an acupuncture needle placement pen and a puncture device, relating to the technical field of medical devices. The acupuncture needle placement pen provided by the present invention comprises a gripping front end and a positioning rear end, the gripping front end and the positioning rear end being connected to form an installation channel for mounting a puncture kit therebetween. The positioning rear end is provided with a mounting structure on a surface facing the installation channel, and the mounting structure is configured to be detachably connected to the puncture kit. The acupuncture needle placement pen provided by the present invention is reusable; after the operation is completed, only the puncture kit needs to be replaced, ensuring safe and effective use while reducing surgical costs and environmental burden.

Description

Technical Field

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

[0002] Trocars are essential precision instruments in ophthalmic surgery, primarily used for complex procedures such as anterior chamber puncture, vitrectomy, and retinal surgery. These procedures often require the use of trocars to establish a stable access channel for surgical instruments such as vitrectomy tips, illumination fibers, and laser fibers to enter the eye smoothly for operation.

[0003] Existing ophthalmic puncture devices are mostly designed for single use. This design primarily aims to avoid the infection risk associated with repeated use, thereby improving surgical safety. However, while single-use puncture devices address infection concerns to some extent, they also significantly increase costs. Furthermore, the large number of disposable medical devices discarded also places a burden on 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 cost of surgery and reduce the environmental burden while ensuring safety and effectiveness in use.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] In the first aspect, the present invention provides a needle placement pen, comprising a gripping front end and a positioning rear end, wherein the gripping front end is connected to the positioning rear end, and an installation channel for installing a puncture kit is formed between the gripping front end and the positioning rear end, and an installation structure is provided on the surface of the positioning rear end facing the installation channel, and the installation structure is used to be detachably connected to the puncture kit.

[0007] In an optional embodiment, the gripping front end includes a housing, a rotating cylinder and a supporting cylinder;

[0008] The rotating cylinder is connected to the position control rear end and is provided with a track groove;

[0009] One end of the push-up cylinder extends into the rotating cylinder and has a guide column that slides with the track groove, and the other end extends out of the rotating cylinder and has a push-up petal;

[0010] One end of the shell is rotatably sleeved on the outside of the lifting cylinder and the top abutment petal, and the other end has a folding cavity. The inner wall of the shell has a spiral groove that cooperates with the guide column. The spiral groove and the track groove are configured to drive the top abutment petal of the top abutment cylinder to approach or move away from the folding cavity when the lifting cylinder rotates relative to the shell, so as to fold or open the top abutment petal.

[0011] In an optional embodiment, the trajectory groove has an extension portion extending in a direction parallel to the axis of the rotary cylinder, and the end surface of the rotary cylinder is provided with a guide port communicating with the extension portion.

[0012] In an optional embodiment, the inner wall of the shell is provided with a buckle groove, and the buckle groove is located between the retraction cavity and the spiral groove along the axial direction of the shell, and the lifting cylinder is provided with a protrusion that rotates with the buckle groove.

[0013] In an optional embodiment, the position control rear end includes a push rod, a needle placement rod and a position control cylinder;

[0014] The position control cylinder is connected to the grip front end;

[0015] One end of the needle placement 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 placement rod is provided with the mounting structure;

[0016] One end of the push rod extends into the position control cylinder and is sleeved on the outside of the needle placement rod, and the other end extends out of the position control cylinder and is used to push the puncture kit. The push rod slides with the position control cylinder along the axial direction of the position control cylinder.

[0017] In an optional embodiment, the mounting structure includes a rib buckle protruding from the inner wall of the needle placement rod.

[0018] In an optional embodiment, the position control tube is provided with a guide groove along its own axial direction, and the inner wall of the position control tube is provided with a plurality of position control holes spaced apart along the axial direction of the position control tube;

[0019] The end of the push rod extending into the positioning tube has an axis head and a positioning column connected to the axis head. The axis head extends out of the guide groove and slides with the guide groove along the extension direction of the guide groove. The positioning column is configured to engage with any one of the positioning holes.

[0020] In an optional embodiment, the position control rear end includes a ranging cap, and the ranging cap is connected to the position control tube.

[0021] In an optional embodiment, a protective cap is further included, and the protective cap is buckled on the front end of the grip.

[0022] In a second aspect, the present invention provides a puncture device, comprising a puncture kit and a needle placement pen as described in any one of the aforementioned embodiments, wherein the puncture kit is inserted into the installation channel and is detachably connected to the installation structure.

[0023] The needle placement pen and puncture device provided by the present invention can produce the following beneficial effects:

[0024] Compared with the prior art, the needle insertion pen provided by the present invention is reusable, and only the puncture kit needs to be replaced after the operation is completed, which ensures safe and effective use while reducing surgical costs and reducing environmental burden.

[0025] The puncture device provided in the second aspect of the present invention has the needle placement pen provided in the first aspect of the present invention, and thus has all the beneficial effects of the needle placement pen provided in the first aspect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of an acupuncture needle placement pen provided in an embodiment of the present invention;

[0028] Figure 2 A longitudinal cross-sectional view of an acupuncture needle placement pen provided by an embodiment of the present invention;

[0029] Figure 3 A partial cross-sectional view of a needle placement pen inserted into a puncture kit according to an embodiment of the present invention Figure 1 ;

[0030] Figure 4 A schematic diagram of a three-dimensional structure of a gripping front end provided by an embodiment of the present invention;

[0031] Figure 5 A longitudinal cross-sectional view of a grip front end provided by an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the three-dimensional structure of a push-on cylinder provided in an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the three-dimensional structure of a rotary cylinder provided in an embodiment of the present invention;

[0034] Figure 8 A longitudinal cross-sectional view of a housing provided by an embodiment of the present invention;

[0035] Figure 9 A partial cross-sectional view of a needle placement pen inserted into a puncture kit according to an embodiment of the present invention Figure 2 ;

[0036] Figure 10 A schematic diagram of a three-dimensional structure of a position control backend provided by an embodiment of the present invention;

[0037] Figure 11 A longitudinal cross-sectional view of a position control rear end provided by an embodiment of the present invention;

[0038] Figure 12 A schematic diagram of the three-dimensional structure of a needle placement rod provided in an embodiment of the present invention;

[0039] Figure 13 A schematic diagram of a three-dimensional structure of a push rod provided by an embodiment of the present invention;

[0040] Figure 14 A schematic diagram of the three-dimensional structure of a position control cylinder provided in an embodiment of the present invention;

[0041] Figure 15 A partial cross-sectional view of a needle placement pen inserted into a puncture kit according to an embodiment of the present invention Figure 3 ;

[0042] Figure 16 for Figure 15 A local enlarged schematic diagram of point A;

[0043] Figure 17 A schematic diagram of the three-dimensional structure of a ranging cap provided by an embodiment of the present invention;

[0044] Figure 18 A front view of a distance measuring cap provided by an embodiment of the present invention Figure 1 ;

[0045] Figure 19 A front view of a distance measuring cap provided by an embodiment of the present invention Figure 2 ;

[0046] Figure 20 A schematic diagram of the structure of a ranging cap provided by an embodiment of the present invention when in use;

[0047] Figure 21 A partial cross-sectional view of a needle placement pen inserted into a puncture kit according to an embodiment of the present invention Figure 4 ;

[0048] Figure 22 A schematic diagram of a partial three-dimensional structure of an acupuncture pen provided by an embodiment of the present invention when inserted into a puncture kit;

[0049] Figure 23 An exploded view of a trocar provided by an embodiment of the present invention;

[0050] Figure 24 A partial cross-sectional view of a trocar provided in an embodiment of the present invention.

[0051] Icons: 1-handle front end; 11-housing; 111-folding chamber; 112-spiral groove; 113-locking groove; 12-spin-up cylinder; 121-track groove; 1211-extension portion; 1212-first limiting portion; 1213-second limiting portion; 122-guide opening; 123-protrusion; 124-locking hole; 13-top cylinder; 131-guide post; 132-top petal; 1321-butt portion; 2-control rear end; 21-push rod; 211-shaft head ;212-control column;213-guide hole;214-notch;22-needle rod;221-installation structure;23-control cylinder;231-guide groove;232-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

[0052] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0056] The embodiment of the first aspect of the present invention is to provide a needle placement pen, such as Figures 1 to 3 As shown, it includes a gripping front end 1 and a positioning rear end 2, the gripping front end 1 is connected to the positioning rear end 2, and an installation channel for installing the puncture kit 3 is formed between the gripping front end 1 and the positioning rear end 2, and a mounting structure 221 is provided on the surface of the positioning rear end 2 facing the installation channel, and the mounting structure 221 is used for detachable connection with the puncture kit 3.

[0057] 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 the surgical operation. After the operation is completed, the connection between the puncture kit 3 and the installation structure 221 can be cancelled. When it is used next time, the new puncture kit 3 can be inserted into the installation channel and connected to the installation structure.

[0058] Therefore, the above-mentioned needle placement pen can be reused, and after the operation is completed, only the puncture kit 3 needs to be replaced, which ensures safe and effective use while reducing surgical costs and reducing environmental burden.

[0059] There are various ways to detachably connect the mounting structure 221 and the puncture kit 3 , such as snapping the mounting structure 221 and the puncture kit 3 , or threading the mounting structure 221 and the puncture kit 3 .

[0060] In an optional embodiment, to facilitate user operation, the mounting structure 221 and the puncture kit 3 are connected by a snap-fit ​​connection. For example, the mounting structure 221 is a protruding structure, and the outer surface of the puncture kit 3 is provided with a recessed ...

[0061] To facilitate the introduction of the use of the gripping front end 1 and the positioning back end 2 in the following sections, the structure of the puncture kit 3 will be described in detail first:

[0062] like Figure 3 As shown, the puncture kit 3 includes a puncture needle 31, a self-closing sleeve 32 and a needle seat 33. One end of the puncture needle 31 is a needle head, and the other end is connected to the needle seat 33. The self-closing sleeve 32 is configured in multiple numbers, and the multiple self-closing sleeves 32 are sequentially arranged on the outside of the puncture needle 31 along the length direction of the puncture needle 31.

[0063] During the operation, the needle tip of the puncture needle 31 can penetrate into the inside of the eyeball. As the puncture needle 31 is inserted, the self-closing cannula 32 at the farthest end of the puncture needle 31 enters the eyeball first. Then the puncture needle 31 is pulled out, and the self-closing cannula 32 will remain in the eyeball under the resistance given by the eyeball, establishing a stable entry and exit channel for surgical instruments. This reciprocating process can achieve the goal of retaining each self-closing cannula 32 in the eyeball.

[0064] It is understandable that the above-mentioned “distal end” refers to the end of the puncture needle 31 away from the operator, and the “proximal end” below refers to the end of the puncture needle 31 close to the operator.

[0065] In order to prevent the self-closing cannula 32 from falling off the puncture needle 31 under the action of gravity, the self-closing cannula 32 has a silicone cap with a slot for the puncture needle 31 to pass through. The squeezing effect of the slot prevents the self-closing cannula 32 from falling off the puncture needle 31. At the same time, the slot will not give the puncture needle 31 a large squeezing force, so that the self-closing cannula 32 can remain in the eyeball under the resistance exerted by the eyeball.

[0066] In addition, the needle seat 33 can be detachably connected to the mounting structure 221. When the mounting structure 221 is a convex structure, the outer surface of the needle seat 33 is concavely provided with a groove that engages with the convex structure.

[0067] The structure of the grip front end 1 is described in detail below:

[0068] 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 push-up cylinder 13, wherein:

[0069] 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;

[0070] One end of the push-up tube 13 extends into the rotating cylinder 12 and has a guide post 131. The guide post 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 rotating cylinder 12 and has a push-up petal 132.

[0071] One end of the housing 11 is rotatably sleeved on the outside of the lifting 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 .

[0072] During use, the lifting cylinder 12 is rotated relative to the outer 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 retraction chamber 111. In the process of approaching the retraction chamber 111, the top petal 132 gradually contacts the retraction chamber 111 and retracts under the pressure of the retraction chamber 111. In the process of moving away from the retraction chamber 111, the top petal 132 gradually separates from the retraction chamber 111 and opens without the pressure of the retraction chamber 111.

[0073] The above-mentioned gripping 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 most distal self-closing cannula 32, providing support for the self-closing cannula 32 during the process of the self-closing cannula 32 entering the eyeball, and preventing the self-closing cannula 32 from retreating proximally. In this way, the above-mentioned gripping front end 1 can not only achieve the movement of the subsequent self-closing cannula 32 toward the distal end after the previous self-closing cannula 32 is reserved in the eyeball, but also provide support for the subsequent self-closing cannula 32 when it enters the eyeball.

[0074] Among them, Figure 6 As shown, the top petal 132 includes multiple petals, which are evenly spaced around the axis of the top tube 13. Figure 5 As shown, the closer to the left end of the top petal 132, the closer the distance between the petal body and the axis of the top tube 13 is, and there is a V-shaped gap between the two adjacent petals. The closer to the left end of the petal body, the larger the V-shaped gap is. Figure 5 The outer diameters of the cross sections of the axially contracting cavity 111 at different locations along the outer shell 11 are different. The closer to the left end face of the outer shell 11, the smaller the outer diameter of the cross section of the contracting cavity 111, so that the closer the top abutment flap 132 is to the left end face of the outer shell 11, the greater the degree of contraction.

[0075] like Figure 5 As shown, an abutment portion 1321 protrudes outward from the end of the petal body. When the top-butting cylinder 13 moves leftward, the abutment portion 1321 can make the top-butting petal 132 easier to fold under the limitation of the folding cavity 111.

[0076] In an optional embodiment, in order to facilitate the guide post 131 to enter the track groove 121, as shown in FIG. Figure 7 As shown, the end surface of the rotary cylinder 12 is provided with a guide port 122 communicating with the track groove 121 .

[0077] During use, the guide post 131 can enter the track groove 121 through the V-shaped guide opening 122 at the front end of the lifting cylinder 12 , and then rotate into the inner cavity of the shell 11 through the cooperation between the guide post 131 and the spiral groove 112 .

[0078] Specifically, if Figure 7 As shown, the guide opening 122 may be V-shaped, with the opening of the guide opening 122 becoming larger as it approaches the end surface of the rotating cylinder 12, thereby facilitating the entry of the guide post 131 into the guide opening 122. The opening at one end of the guide opening 122, away from the end surface of the rotating cylinder 12, may be slightly smaller than the size of the guide post 131 to prevent the guide post 131 from escaping from the guide opening 122.

[0079] In an optional embodiment, if Figure 7As shown, the track groove 121 has an extension portion 1211 extending in a direction parallel to the axis of the rotating cylinder 12, so that when the rotating cylinder 12 is rotated, the abutting cylinder 13 can move in a direction parallel to the axis of the rotating cylinder 12, gradually approaching or moving away from the retracting cavity 111.

[0080] Settings, such as Figure 7 As shown, the left end of the extension portion 1211 is the end point of the track groove 121 , and the right end of the extension portion 1211 is the starting point of the track groove 121 .

[0081] Specifically, if Figure 7 As shown, the trajectory groove 121 also includes a first limiting portion 1212 and a second limiting portion 1213. The first limiting portion 1212 is connected to the left end of the extension portion 1211, and the second limiting portion 1213 is connected to the right end of the extension portion 1211. The first limiting portion 1212 and the second limiting portion 1213 both extend along the circumference of the lifting cylinder 12 and are opposite to the extension direction of the extension portion 1211.

[0082] During use, the rotary cylinder 12 can be Figure 7 By rotating in the direction of the arrow shown, the guide post 131 of the abutting cylinder 13 enters the right end of the extension 1211 from the second limiting portion 1213. Guided by the spiral groove 112, the guide post 131 moves along the extension 1211 to the left end of the extension 1211, and then enters the first limiting portion 1212 and becomes locked. Similarly, by rotating the abutting cylinder 13 in the opposite direction, the guide post 131 enters the second limiting portion 1213 from the first limiting portion 1212 and becomes locked.

[0083] In an optional embodiment, a buckle hole 124 is provided on the rotary cylinder 12 , and the buckle hole 124 can be engaged with the position-controlling rear end 2 to achieve connection with the position-controlling rear end 2 .

[0084] In an optional embodiment, if Figure 8 As shown, in order to enable the spiral cylinder 12 to rotate stably relative to the shell 11, the inner wall of the shell 11 is recessed with a buckle groove 113. The buckle groove 113 is located between the retracting cavity 111 and the spiral groove 112 along the axial direction of the shell 11. Figure 7 As shown, the rotary cylinder 12 is provided with a protrusion 123 that rotates with the buckling groove 113 .

[0085] After the push-up cylinder 13 rotates into the inner cavity of the shell 11 under the cooperation of the guide column 131 and the spiral groove 112, the connection between the shell 11, the spiral cylinder 12 and the push-up cylinder 13 can be achieved through the snap connection between the buckle groove 113 and the protrusion 123.

[0086] The structure of the position control back end 2 is described in detail below:

[0087] In an optional embodiment, if Figures 10 to 14As shown, the position control rear end 2 includes a push rod 21, a needle setting rod 22 and a position control cylinder 23, wherein:

[0088] The outer wall of the position control cylinder 23 may be provided with a buckle 233, which is engaged with the buckle hole 124 on the rotating cylinder 12;

[0089] One end of the needle 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 inner wall of the needle rod 22 is provided with a mounting structure 221;

[0090] One end of the push rod 21 extends into the position control cylinder 23 and is sleeved on the outside of the needle rod 22, and the other end extends out of the position control cylinder 23 and is used to push the puncture kit 3. The push rod 21 slides with the position control cylinder 23 along the axial direction of the position control cylinder 23.

[0091] When in use, the needle seat 33 can be inserted into the needle rod 22 and connected to the mounting structure 221. Since the push rod 21 slides along the axial direction of the position control cylinder 23 and cooperates with the position control cylinder 23, when the push rod 21 slides toward the distal end of the needle pen, Figure 15 As shown, when the top flap 132 is in the open state, the end of the push rod 21 can push the self-closing sleeve 32 located at the proximal end of the puncture needle 31 toward the distal end of the puncture needle 31.

[0092] Therefore, the position-controlling rear end 2 in the above embodiment can not only fix the needle seat 33, but also push the self-closing sleeve 32, making it easier for users to perform surgical operations.

[0093] In an optional embodiment, if Figure 16 As shown, the mounting structure 221 includes a rib buckle protruding from the inner wall of the needle rod 22, and the needle seat 33 is provided with an annular groove 331 that is engaged with the rib buckle.

[0094] After the puncture kit 3 is used, the puncture needle 31 can be clamped with tweezers to cancel the engagement between the rib buckle and the annular groove 331 and the puncture kit 3 can be pulled out.

[0095] In an optional embodiment, if Figure 13 As shown, a guide hole 213 for pushing the puncture kit 3 is recessed at the end of the push rod.

[0096] In an optional embodiment, if Figure 13 and 14 As shown, the positioning tube 23 is provided with a guide groove 231 along its own axial direction, and the inner wall of the positioning tube 23 is recessed with a plurality of positioning holes 232 distributed at intervals along the axial direction of the positioning tube 23; the end of the push rod 21 extending into the positioning tube 23 has an axis head 211 and a positioning column 212 connected to the axis head 211, the axis head 211 extends out of the guide groove 231 and slides with the guide groove 231 along the extension direction of the guide groove 231, and the positioning column 212 is configured to engage with any one of the positioning holes 232.

[0097] In the above embodiment, the push rod 21 can be limited during its sliding process, thereby preventing the push rod 21 from sliding too far or too short.

[0098] In an optional embodiment, if Figure 13 As shown, a notch 214 is provided at one end of the push rod 21 extending into the position control tube 23. 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 to facilitate the position control column 212 to disengage from the position control hole 232.

[0099] In an optional embodiment, if Figure 17 As shown, the position control rear end 2 includes a distance measuring cap 24 , and the distance measuring cap 24 is connected to the position control tube 23 .

[0100] like Figure 17 As shown, a plurality of scale points 241 are provided at one end of the ranging cap 24 away from the positioning tube 23. The plurality of scale points 241 are used to measure or locate the incision position to help the doctor accurately puncture the sclera.

[0101] During surgery, the incision is usually made 3-4 mm from the limbus, as follows Figure 18 and Figure 19 As shown, the measuring cap 24 provides a measuring scale distance d1 of 3 mm and a measuring scale distance d2 of 4 mm. In practice, multiple 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 a concave point 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.

[0102] The following is a detailed description of the use of the needle pen. When a puncture is completed and a 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 proximal self-closing sleeve 32 to move toward the distal direction. When the control column 212 moves into the next control hole 232, the push rod 21 stops moving to complete the removal of the second self-closing sleeve 32. Subsequently, 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 22As shown, the top flap 132 cooperates with the retraction chamber 111 to begin to retract, and the end surface of the top flap 132 contacts the end surface of the silicone cap at the end of the self-closing cannula 32, completely ejecting the self-closing cannula 32. To perform the third puncture, rotate the lifting cylinder 12 so that the guide post 131 moves along the spiral groove 112 to the starting point of the track groove 121. Repeat the above steps to complete the removal of the last self-closing cannula 32. After using the self-closing cannula 32, use tweezers to grasp the puncture needle 31 and remove it from the puncture kit 3.

[0103] In an optional embodiment, if Figure 23 and Figure 24 As shown, the needle placement pen further includes a protective cap 4 , which is buckled on the grip front end 1 to protect the puncture kit 3 .

[0104] 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.

[0105] 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.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A needle placement pen, characterized in that: The device comprises a gripping front end (1) and a positioning rear end (2), wherein the gripping front end (1) is connected to the positioning rear end (2), and an installation channel for installing a puncture kit (3) is formed between the gripping front end (1) and the positioning rear end (2), and a mounting structure (221) is provided on a surface of the positioning rear end (2) facing the installation channel, and the mounting structure (221) is used for detachably connecting with the puncture kit (3); The gripping front end (1) comprises a housing (11), a rotating cylinder (12) and a supporting cylinder (13); The rotating cylinder (12) is connected to the position control rear end (2), and the rotating cylinder (12) is provided with a track groove (121); One end of the push-up cylinder (13) extends into the rotating cylinder (12) and has a guide column (131) that slidably cooperates with the track groove (121), and the other end extends out of the rotating cylinder (12) and has a push-up flap (132); One end of the shell (11) is rotatably sleeved on the outside of the spiral cylinder (12) and the top flap (132), and the other end has a retraction cavity (111). The inner wall of the shell (11) has a spiral groove (112) that cooperates with the guide column (131). The spiral groove (112) and the track groove (121) are configured to drive the top flap (132) of the top flap (132) of the top flap (13) to approach or move away from the retraction cavity (111) when the spiral cylinder (12) rotates relative to the shell (11), so as to retract or open the top flap (132). The position control rear end (2) comprises a push rod (21), a needle placement rod (22) and a position control cylinder (23); The position control cylinder (23) is connected to the gripping front end (1); One end of the needle placement 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 placement rod (22) is provided with the mounting structure (221); One end of the push rod (21) extends into the position control cylinder (23) and is sleeved on the outside of the needle placement rod (22), and the other end extends out of the position control cylinder (23) and is used to push the puncture kit (3). The push rod (21) slides with the position control cylinder (23) along the axial direction of the position control cylinder (23).

2. The needle placement pen according to claim 1, characterized in that The track groove (121) has an extension portion (1211) extending in a direction parallel to the axis of the rotary cylinder (12), and the end surface of the rotary cylinder (12) is provided with a guide port (122) communicating with the extension portion (1211).

3. The needle placement pen according to claim 1, characterized in that: A buckle groove (113) is recessed on the inner wall of the shell (11), and the buckle groove (113) is located between the retraction cavity (111) and the spiral groove (112) along the axial direction of the shell (11). The lifting cylinder (12) is provided with a protrusion (123) that rotatably cooperates with the buckle groove (113).

4. The needle placement pen according to claim 1, characterized in that The mounting structure (221) comprises a rib buckle protruding from the inner wall of the needle placement rod (22).

5. The needle placement pen according to claim 1, characterized in that: The position control cylinder (23) is provided with a guide groove (231) along its own axial direction, and the inner wall of the position control cylinder (23) is provided with a plurality of position control holes (232) spaced apart along the axial direction of the position control cylinder (23); One end of the push rod (21) extending into the position control cylinder (23) has an axis head (211) and a position control column (212) connected to the axis head (211); the axis head (211) extends out of the guide groove (231) and slides with the guide groove (231) along the extension direction of the guide groove (231); the position control column (212) is configured to be engaged with any one of the position control holes (232).

6. The needle placement pen according to claim 1, characterized in that: The position control rear end (2) comprises a distance measuring cap (24), and the distance measuring cap (24) is connected to the position control cylinder (23).

7. The needle placement pen according to any one of claims 1 to 6, characterized in that: It also includes a protective cap (4), which is buckled on the gripping front end (1).

8. A trocar, characterized in that: It comprises a puncture kit (3) and the needle placement pen according to any one of claims 1 to 7, wherein the puncture kit (3) is inserted into the installation channel and is detachably connected to the installation structure (221).

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