Puncture outfit facilitating replacement of disposable consumables

Abstract

The puncture outfit comprises a switching cap and a choke valve connected with the lower end of the switching cap, a sleeve seat is mounted at the lower end of the choke valve, a disposable cannula is arranged in the sleeve seat, the lower end of the disposable cannula extends to the position below the sleeve seat, and the lower end of the disposable cannula is connected with the switching cap. The lower end of the sleeve seat is provided with a vertically-through through hole matched with the disposable sleeve, and a plurality of clamping blocks distributed in an annular array mode with the disposable sleeve as the center are arranged in the sleeve seat. All the clamping blocks arranged in the annular array synchronously do linear motion in the radial direction of the disposable casing pipe in the direction close to the disposable casing pipe, and the disposable casing pipe is clamped and fixed. By arranging the clamping blocks and utilizing blocking of the connecting disc, fixing of the disposable casing pipe is achieved, operation can be simplified, the fixing effect can be improved, the risk of casing pipe deformation is avoided, and the disposable casing pipe fixing device is suitable for installation and replacement of the disposable casing pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a puncture device that is convenient for replacing disposable consumables. Background Art

[0002] A trocar is a medical device commonly used in minimally invasive surgery and interventional procedures. It is used to pierce the skin and other tissues to establish a channel for the introduction of other instruments, medications, or sampling. A trocar typically consists of a conversion cap, a sleeve, and a puncture rod. The conversion cap is the top component of the trocar, used to connect with other instruments and secure them to the puncture point. It provides an interface that allows other instruments to enter the body cavity or target area through the trocar. The sleeve is the bottom component of the trocar, connected to the conversion cap. The end of the sleeve is equipped with a trocar sleeve for insertion into the skin and tissue to form a channel. The puncture rod is a slender metal rod that passes through the conversion cap and sleeve and extends to the outer end of the trocar sleeve. It has a sharp tip and is used to pierce the skin and tissue.

[0003] The disposable cannula can effectively isolate the puncture device from the patient's skin and tissue, reducing the risk of infection. The use of disposable cannula can avoid cross-infection between different patients and protect the safety and health of patients. In the prior art, in order to improve the convenience of replacing the disposable cannula, the disposable cannula and the sleeve seat are connected by a snap structure or a threaded structure. The disposable cannula is usually made of a flexible material, such as plastic or rubber. When replacing, the user may need to apply a certain amount of force to hold the cannula or rotate the cannula to connect it to the sleeve seat. If the force applied by the user is too large or uneven, it may cause the cannula to deform, such as flattening, deformation or damage.

[0004] Chinese patent publication number CN111529016A discloses a trocar that includes a passage for a surgical instrument, a choke valve and a sealing component for sealing the passage, and an absorbent component with an absorbent function. The absorbent component has a through-hole for the surgical instrument to pass through. When the surgical instrument passes through the through-hole, it can contact the absorbent component, allowing contaminants on the surgical instrument to be absorbed by the absorbent component. The absorbent component is located downstream of the choke valve and the sealing component along the direction of entry of the surgical instrument. In this prior art, the cannula is installed by snapping together. During installation, the cannula needs to be grasped and a force applied to the cannula, which poses a risk of deformation. Furthermore, the snapping position needs to be aligned during the snapping process, which increases the amount of installation work required and reduces installation efficiency.

[0005] Chinese patent publication number CN203710097U discloses a trocar, comprising a conversion cap and a sleeve base. A puncture rod is inserted into the conversion cap and sleeve base, forming a chamber between the puncture rod and the trocar sleeve. The conversion cap is connected to the sleeve base via a detachable directional connection structure. An anti-sway connection structure is also provided between the conversion cap and sleeve base. The trocar sleeve comprises a sleeve body, the end of which is connected to a tapered tube. The puncture rod extends through the entire tapered tube and is in circumferential contact with the tube. The sidewall of the tapered tube is provided with at least one vent. This prior art achieves cannula installation by providing a detachable connection assembly. However, during installation, the cannula still needs to be gripped and a force applied to the cannula, which poses a risk of deformation due to the force. Summary of the Invention

[0006] (1) Technical problems solved

[0007] When installing the existing disposable cannula, a force needs to be applied to the cannula. If the force applied by the user is too large or uneven, the cannula may be deformed and the installation efficiency may be low.

[0008] (2) Technical solution

[0009] A trocar for facilitating replacement of disposable consumables, comprising a conversion cap and an air-blocking valve connected to the lower end of the conversion cap; a sleeve seat is mounted at the lower end of the air-blocking valve; a disposable sleeve is disposed within the sleeve seat, and the lower end of the disposable sleeve extends below the sleeve seat; a through hole is formed at the lower end of the sleeve seat, extending vertically therethrough and matching the disposable sleeve; and a plurality of clamping blocks are disposed within the sleeve seat, distributed in a circular array with the disposable sleeve as the center.

[0010] All the clamping blocks arranged in a circular array move linearly along the radial direction of the disposable sleeve and synchronously move toward the disposable sleeve to clamp and fix the disposable sleeve.

[0011] Preferably, a fixing ring is fixedly mounted on the lower wall of the inner cavity of the sleeve seat, and the fixing ring and the through hole are concentrically arranged. The inner wall of the fixing ring is provided with linear grooves matching the number of clamping blocks. The linear grooves are arranged along the radial direction of the disposable cannula, and several clamping blocks are distributed and slidably connected to several linear grooves.

[0012] The circumferential surface of the fixed ring is movably sleeved with a rotatable turntable, and the upper end of the turntable is provided with arc grooves matching the number of clamping blocks, one end of the arc groove faces the center of the turntable, and the other end faces the circumferential surface of the turntable, and a driving rod is slidably connected in each of the arc grooves, and several of the driving rods are fixedly connected to the corresponding clamping blocks respectively;

[0013] A gear ring is installed on the circumferential surface of the turntable, the gear ring is meshed with a gear, the gear is coaxially fixedly connected to a worm wheel, the worm wheel is meshed with a worm, and a knob is installed on one end of the worm.

[0014] Preferably, the worm movably passes through the sleeve seat and extends to the outside of the sleeve seat, and the knob is located on the outside of the sleeve seat.

[0015] Preferably, a stop block is installed on one end of the clamping block away from the driving rod, and an arc surface is formed on the end of the stop block away from the clamping block, and the arc surface matches the disposable sleeve.

[0016] Preferably, a fixing ring seat is installed on the upper wall of the inner cavity of the sleeve seat, and the fixing ring seat is concentrically arranged with the through hole. A positioning ring is installed on the lower end of the fixing ring seat, and the inner wall of the positioning ring is provided with several positioning protrusions protruding inward.

[0017] Preferably, a connecting disk is installed at the upper end of the disposable sleeve, the diameter of the connecting disk is equal to the diameter of the through hole, and the circumferential surface of the connecting disk is provided with positioning grooves matching the number of positioning protrusions, and the positioning grooves match the positioning protrusions.

[0018] Preferably, the upper end surface of the stop block is in close contact with the lower end surface of the connecting plate.

[0019] Preferably, a puncture rod is further included, which passes through the conversion cap, the air blocking valve and the sleeve seat in sequence from top to bottom, and the lower end of the puncture rod extends to the bottom of the disposable sleeve.

[0020] (3) Beneficial effects

[0021] 1. By setting several clamping blocks to apply force to the disposable cannula along its radial direction, the cannula can be fixed for the first time. Subsequently, the clamping blocks block the connecting disc, forcing the connecting disc to always be located inside the sleeve seat, completing the second fixation of the cannula. This installation method avoids the user directly applying force to the disposable cannula, reduces the risk of deformation of the cannula, and maintains the integrity and functionality of the cannula.

[0022] 2. Through the design of the worm gear and worm mechanism, combined with the arc groove and straight groove on the turntable, the reliable movement and fixation of the clamp can be achieved. This transmission method has one-way transmission, which can effectively prevent the loosening of the clamp and ensure the stability and reliability of the clamp during operation.

[0023] 3. The user does not need to apply direct force to the disposable cannula, reducing the complexity and risk of the installation process; the cannula is fixed by several clamping blocks, which can provide uniform fixing force and ensure the stability and safety of the cannula; through the structural design of the clamping blocks and the connecting plate, the cannula can be relatively easily disassembled and replaced, realizing the convenience and economy of replacing the disposable cannula. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the assembled state of the entire trocar proposed in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the disassembled state of the entire trocar proposed in the embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the sleeve seat in an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the structure of the sleeve seat in an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the internal structure of the sleeve seat in an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the structure of the turntable in an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of the structure of the turntable from another perspective in an embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the structure of the clamping block in an embodiment of the present invention.

[0033] In the figure: 1, sleeve base; 2, air blocking valve; 3, conversion cap; 4, puncture rod; 5, disposable cannula; 51, connecting plate; 52, positioning groove;

[0034] 11. Through hole; 12. Fixed ring seat; 13. Positioning ring; 14. Turntable; 15. Arc groove; 16. Drive rod; 17. Clamping block; 18. Fixed ring; 19. Linear groove;

[0035] 141. ring gear; 142. gear; 143. worm gear; 144. worm; 145. knob;

[0036] 171. Block; 172. Arc surface. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figures 1-8 This embodiment includes a conversion cap 3 and a choke valve 2 connected to the lower end of the conversion cap 3. The lower end of the choke valve 2 is mounted with a sleeve seat 1. In this embodiment, a removable cover is provided at the lower end of the sleeve seat 1. When the puncture rod 4 is withdrawn, contaminants remaining on the puncture rod 4 may enter the interior of the sleeve seat 1. In this case, the cover is removed to facilitate cleaning and disinfection of the interior of the sleeve seat 1. A disposable sleeve 5 is provided inside the sleeve seat 1, and the lower end of the disposable sleeve 5 extends below the sleeve seat 1. The lower end of the sleeve seat 1 is provided with a through hole 11 extending vertically and matching the disposable sleeve 5. The interior of the sleeve seat 1 is provided with six clamping blocks 17 distributed in a circular array centered on the disposable sleeve 5. It should be noted that in the present invention, the conversion cap 3 and the choke valve 2 adopt currently known devices. Since they are not the focus of the technical solution to be protected by this application, they will not be described in detail.

[0040] Among them, all the clamping blocks 17 arranged in a circular array move linearly along the radial direction of the disposable sleeve 5 in a synchronous manner toward the disposable sleeve 5 to clamp and fix the disposable sleeve 5.

[0041] Specifically, a fixing ring 18 is fixedly installed on the lower wall of the inner cavity of the sleeve seat 1, and the fixing ring 18 and the through hole 11 are concentrically arranged. The inner wall of the fixing ring 18 is provided with linear grooves 19 that match the number of clamping blocks 17. In this embodiment, the length of the linear grooves 19 is greater than the length of the clamping blocks 17. In the initial state, the clamping blocks 17 can be entirely located in the linear grooves 19 to avoid obstructing the disposable sleeve 5 from entering the interior of the sleeve seat 1. The linear grooves 19 are arranged along the radial direction of the disposable sleeve 5, and the six clamping blocks 17 are distributed and slidably connected to several linear grooves 19; through the guiding effect of the linear grooves 19, the clamping blocks 17 can only move linearly along the linear grooves 19.

[0042] In order to ensure that the six clamping blocks 17 exert the same force on the disposable sleeve 5, the six clamping blocks 17 need to move synchronously. Specifically, the circumferential surface of the fixed ring 18 is movably connected with a rotatable turntable 14, and the upper end of the turntable 14 is provided with an arc groove 15 that matches the number of clamping blocks 17. One end of the arc groove 15 faces the center of the turntable 14, and the other end faces the circumferential surface of the turntable 14. A driving rod 16 is slidably connected in each of the arc grooves 15, and several of the driving rods 16 are fixedly connected to the corresponding clamping blocks 17 respectively; when the turntable 14 rotates, the turntable 14 drives the driving rod 16 to move along the linear groove 19 through the arc groove 15. In this embodiment, when the turntable 14 rotates counterclockwise, the clamping block 17 moves in the direction away from the disposable sleeve 5, and when the turntable 14 rotates clockwise, the clamping block 17 moves in the direction close to the disposable sleeve 5.

[0043] When other instruments enter the body cavity or target area through the trocar, the operation of the other instruments may cause the sleeve base 1 to shake. In order to prevent the turntable 14 from shaking and thus causing the clamping block 17 to loosen, in this embodiment, a ring gear 141 is installed on the circumferential surface of the turntable 14. The ring gear 141 is meshed with a gear 142, and the gear 142 is coaxially fixedly connected to a worm wheel 143. The worm wheel 143 is meshed with a worm 144. A knob 145 is installed at one end of the worm 144. The outer surface of the knob 145 is engraved with anti-slip grooves to increase the friction coefficient of the knob 145. The user rotates the knob 145 to drive the worm 144 to rotate, the worm 144 drives the worm wheel 143 to rotate, the worm wheel 143 drives the gear 142 to rotate, the gear 142 drives the ring gear 141 to rotate, and the ring gear 141 drives the turntable 14 to rotate.

[0044] The worm 144 movably passes through the sleeve seat 1 and extends to the outside of the sleeve seat 1, and the knob 145 is located outside the sleeve seat 1. In this embodiment, the circumferential surface of the sleeve seat 1 protrudes toward the worm 144, which is convenient for installing components such as the worm wheel 143 and the worm 144.

[0045] A stop block 171 is installed at the end of the clamping block 17 away from the driving rod 16, and the connecting disk 51 is restricted inside the sleeve seat 1 by the stop block 171. An arc surface 172 is formed at the end of the stop block 17 away from the clamping block 17, and the arc surface 172 matches the disposable sleeve 5. The contact area between the clamping block 17 and the disposable sleeve 5 is increased by setting the arc surface 172.

[0046] Because the clamping block 17 only applies radial force to the disposable cannula 5, in order to prevent the disposable cannula 5 from rotating, in this embodiment, a fixing ring seat 12 is mounted on the upper wall of the inner cavity of the sleeve seat 1. The fixing ring seat 12 is concentrically arranged with the through hole 11. A positioning ring 13 is mounted on the lower end of the fixing ring seat 12. The inner wall of the positioning ring 13 is provided with several inwardly protruding positioning protrusions. A connecting disk 51 is mounted on the upper end of the disposable cannula 5. The diameter of the connecting disk 51 is equal to the diameter of the through hole 11. The circumferential surface of the connecting disk 51 is provided with positioning grooves 52 that match the number of positioning protrusions. The positioning grooves 52 and the positioning protrusions cooperate to prevent the connecting disk 51 from rotating.

[0047] In order to prevent the connection disk 51 from loosening in its axial direction, in this embodiment, the upper end surface of the stop block 171 is in close contact with the lower end surface of the connection disk 51. The stop block 171 blocks the connection disk 51 and prevents the connection disk 51 from shaking in its axial direction.

[0048] The puncture rod 4 is also included. The puncture rod 4 passes through the conversion cap 3, the air blocking valve 2 and the sleeve seat 1 from top to bottom in sequence, and the lower end of the puncture rod 4 extends to the bottom of the disposable sleeve 5.

[0049] Example 2

[0050] The structure and principle of this second embodiment are basically the same as those of the first embodiment, except that the worm 144 is driven by a micromotor, and a control button for controlling the start, stop, and forward and reverse rotation of the micromotor is installed on the circumferential surface of the sleeve base 1. A battery module for powering the micromotor is installed inside the sleeve base 1. During use, the connecting disk 51 is aligned with the positioning protrusion and inserted into the through hole 11. The control button is then pressed to rotate the turntable 14 counterclockwise, causing the clamping block 17 to contact the circumferential surface of the disposable cannula 5, completing the installation of the disposable cannula 5. When replacing, the control button is pressed again to rotate the turntable 14 clockwise, causing the clamping block 17 to move away from the disposable cannula 5, at which point the disposable cannula 5 can be removed.

[0051] In the description of the present invention, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0052] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and alterations may be made to the embodiments without departing from the spirit and scope of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A trocar that facilitates replacement of disposable consumables, comprising a conversion cap (3) and a blocking valve (2) connected to the lower end of the conversion cap (3), characterized in that: A sleeve seat (1) is installed at the lower end of the air blocking valve (2), a disposable sleeve (5) is arranged inside the sleeve seat (1), and the lower end of the disposable sleeve (5) extends to the bottom of the sleeve seat (1), a through hole (11) is opened at the lower end of the sleeve seat (1) and passes through from top to bottom to match the disposable sleeve (5), and a plurality of clamping blocks (17) are arranged inside the sleeve seat (1) and are distributed in a ring array with the disposable sleeve (5) as the center; All the clamping blocks (17) arranged in a circular array move linearly along the radial direction of the disposable sleeve (5) in a synchronous manner toward the disposable sleeve (5), thereby clamping and fixing the disposable sleeve (5).

2. A trocar for facilitating replacement of disposable consumables according to claim 1, characterized in that: A fixing ring (18) is fixedly mounted on the lower wall of the inner cavity of the sleeve seat (1), and the fixing ring (18) and the through hole (11) are concentrically arranged. The inner wall of the fixing ring (18) is provided with linear grooves (19) matching the number of clamping blocks (17). The linear grooves (19) are arranged along the radial direction of the disposable sleeve (5), and a plurality of the clamping blocks (17) are distributed and slidably connected to a plurality of linear grooves (19). The circumferential surface of the fixed ring (18) is movably sleeved with a rotatable turntable (14), and the upper end of the turntable (14) is provided with arc grooves (15) whose number matches the number of clamping blocks (17), one end of the arc groove (15) faces the center of the turntable (14), and the other end faces the circumferential surface of the turntable (14), and a driving rod (16) is slidably connected in each of the arc grooves (15), and several of the driving rods (16) are fixedly connected to the corresponding clamping blocks (17); A gear ring (141) is mounted on the circumferential surface of the rotating disk (14), the gear ring (141) is meshedly connected to a gear (142), the gear (142) is coaxially fixedly connected to a worm wheel (143), the worm wheel (143) is meshedly connected to a worm (144), and a knob (145) is mounted on one end of the worm (144).

3. The trocar for facilitating replacement of disposable consumables according to claim 2, characterized in that: The worm (144) movably passes through the sleeve seat (1) and extends to the outside of the sleeve seat (1), and the knob (145) is located outside the sleeve seat (1).

4. A trocar for facilitating replacement of disposable consumables according to claim 1 or 2, characterized in that: A stop block (171) is installed at one end of the clamping block (17) away from the driving rod (16), and an arc surface (172) is provided at one end of the stop block (171) away from the clamping block (17), and the arc surface (172) matches the disposable sleeve (5).

5. The trocar for facilitating replacement of disposable consumables according to claim 4, characterized in that: A fixed ring seat (12) is installed on the upper wall of the inner cavity of the sleeve seat (1), and the fixed ring seat (12) is concentrically arranged with the through hole (11). A positioning ring (13) is installed on the lower end of the fixed ring seat (12), and the inner wall of the positioning ring (13) is provided with a plurality of positioning protrusions protruding inward.

6. The trocar for facilitating replacement of disposable consumables according to claim 5, characterized in that: A connecting disk (51) is installed at the upper end of the disposable sleeve (5), the diameter of the connecting disk (51) is equal to the diameter of the through hole (11), and the circumferential surface of the connecting disk (51) is provided with positioning grooves (52) matching the number of positioning protrusions, and the positioning grooves (52) match the positioning protrusions.

7. The trocar for facilitating replacement of disposable consumables according to claim 6, characterized in that: The upper end surface of the stop block (171) is in close contact with the lower end surface of the connecting plate (51).

8. The trocar for facilitating replacement of disposable consumables according to claim 1, characterized in that: It also includes a puncture rod (4), which passes through the conversion cap (3), the air blocking valve (2) and the sleeve seat (1) in sequence from top to bottom, and the lower end of the puncture rod (4) extends to the bottom of the disposable sleeve (5).

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