Puncture outfit
By opening installation grooves and snap grooves in the inner wall of the mounting hole of the piercing device, and using the return spring design, the problem of easy dislocation of the piercing rod is solved, and the normal cutting of the piercing knife and the stable use of the piercing device are achieved.
Patent Information
- Application Number
- CN202421632610.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The puncture rods of existing puncture devices are prone to misalignment, resulting in the puncture knife being unable to cut normally.
A piercing device is designed to fix the position by opening the installation groove and the positioning groove on the inner wall of the mounting hole, and to avoid misalignment by using a piercing rod with mounting bumps. At the same time, a return spring is provided so that the puncture rod can be moved in a vertical direction for effective use of the puncture knife.
It effectively avoids misalignment of the piercing rod, ensures that the piercing knife can be cut normally, and improves the stability and safety of the piercing device.
Smart Images
Figure CN222983125U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a trocar. Background Art
[0002] A trocar is a common medical device, mainly used in minimally invasive surgery. The trocar pierces the abdominal wall through a puncture knife to construct a passage leading to the abdominal cavity, so that other minimally invasive medical devices can enter the abdominal cavity for corresponding surgical operations. The structure design of the trocar in the related technology is not reasonable enough, resulting in the puncture rod being prone to dislocation during use, making the puncture knife unable to cut normally. Summary of the Utility Model
[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a trocar that can effectively avoid the dislocation of the puncture rod.
[0004] The trocar according to the first aspect embodiment of the utility model includes
[0005] A cover body, a mounting cavity is formed by the bottom of the cover body being recessed upward;
[0006] A bottom plate, the bottom plate is installed at the bottom of the cover body, the bottom plate is provided with a mounting hole, and the inner wall of the mounting hole is provided with a mounting groove and a clamping groove. The mounting groove and the clamping groove are arranged at equal intervals along the circumferential direction of the mounting hole, and the cross-sectional area of the mounting groove is larger than that of the clamping groove;
[0007] A puncture rod, one end of the puncture rod is provided with a mounting convex block, the puncture rod passes through the mounting hole, the mounting convex block is located in the mounting cavity, and the shape of the mounting convex block is the same as that of the mounting groove;
[0008] A puncture knife, one end of the puncture knife passes through the puncture rod, and the other end of the puncture knife is installed at the bottom of the mounting cavity;
[0009] A return spring is arranged in the mounting cavity, one end of the return spring is connected to the mounting convex block, and the other end of the return spring is connected to the bottom of the mounting cavity.
[0010] The trocar according to the embodiment of the utility model has at least the following beneficial effects: By providing a mounting groove on the inner wall of the mounting hole, the puncture rod with the mounting convex block can pass through the bottom plate. By providing a clamping groove inside the mounting hole, the mounting convex block can be clamped to avoid the dislocation of the puncture rod. By providing a return spring, the puncture rod can move in the vertical direction to expose the puncture knife.
[0011] According to some embodiments of the present utility model, the installation groove includes a first installation groove and a second installation groove, the clamping groove includes a first clamping groove and a second clamping groove, the first installation groove and the second installation groove are arranged oppositely, the first clamping groove and the second clamping groove are arranged oppositely, the installation bump includes a first installation bump and a second installation bump, and the first installation bump and the second installation bump are arranged oppositely.
[0012] According to some embodiments of the present utility model, a fixing groove and a limiting block for restricting a return spring are further provided at the bottom of the installation cavity, the other end of the puncture knife is installed in the fixing groove, the return spring is sleeved outside the fixing groove, and the return spring is located between the fixing groove and the limiting block.
[0013] According to some embodiments of the present utility model, an elastic switch is further included, a first clamping position is provided on the inner wall of the installation cavity, the elastic switch is provided with a second clamping position matching the first clamping position, and the first clamping position and the second clamping position are in mutual abutment.
[0014] According to some embodiments of the present utility model, the elastic switch is further provided with a first buckle, a fixing hole is further opened on the bottom plate, and the first buckle passes through the fixing hole.
[0015] According to some embodiments of the present utility model, the puncture rod is provided with a protective cover, one end of the puncture knife is provided with a puncture part, the protective cover is sleeved on the puncture part, and the end of the protective cover matches the puncture part.
[0016] According to some embodiments of the present utility model, the puncture part is a double-edged blade, and the protective cover is provided with a puncture end with a double-edged structure.
[0017] According to some embodiments of the present utility model, the double-edged blade includes a blade body and a blade head, and the side walls of the blade body and the blade head are smoothly transitionally connected.
[0018] According to some embodiments of the present utility model, the puncture rod is provided with a second buckle, and the protective cover is provided with a first clamping groove matching the second buckle.
[0019] According to some embodiments of the present utility model, a convex ring is provided at one end of the puncture rod away from the cover body, and the convex ring inclines inwards along the length direction of the puncture rod.
[0020] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings
[0021] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments, where:
[0022] Figure 1 is a schematic structural diagram of a trocar according to an embodiment of the present utility model;
[0023] Figure 2 is a partial schematic diagram of a trocar according to an embodiment of the present utility model;
[0024] Figure 3 is Figure 1 a schematic diagram of a puncture knife of the trocar shown. Specific embodiments
[0025] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.
[0026] In the description of the present utility model, it should be understood that with regard to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 of the present utility model.
[0027] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.
[0028] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.
[0029] Refer to Figure 1 and Figure 2, in the embodiment of the present utility model, the puncture device includes a cover body 100, a bottom plate 200, a puncture rod 400, a puncture knife 300 and a return spring 500. A mounting cavity is formed by the upward depression at the bottom of the cover body 100, and the bottom plate 200 covers the mounting cavity. Among them, the bottom plate 200 is provided with a mounting hole 210, and a mounting groove 211 and a clamping groove 212 are formed on the inner wall of the mounting hole 210. The mounting groove 211 and the clamping groove 212 are evenly arranged at intervals along the circumferential direction of the mounting hole 210. The cross-sectional area of the mounting groove 211 is larger than that of the clamping groove 212. The clamping groove 212 is used to fix the mounting protrusion 410 on the puncture rod 400. One end of the puncture rod 400 is provided with a mounting protrusion 410. The puncture rod 400 passes through the mounting hole 210, and the mounting protrusion 410 is located in the mounting cavity. The shape of the mounting protrusion 410 is the same as that of the mounting groove 211, that is, the mounting protrusion 410 can pass through the mounting groove 211 but cannot pass through the clamping groove 212. During actual use, the mounting protrusion 410 can enter the mounting cavity through the mounting groove 211. After entering the mounting cavity, the mounting protrusion 410 can be driven to rotate by rotating the puncture rod 400, so that the mounting protrusion 410 moves away from the mounting groove 211, realizing the fixation of the position of the puncture rod 400 and avoiding the dislocation of the puncture rod 400 during use. Among them, the mounting protrusion 410 can be rotated to the position of the clamping groove 212, and then the mounting protrusion 410 is clamped and fixed. One end of the puncture rod 400 away from the mounting protrusion 410 is a through hole. One end of the puncture knife 300 passes through the puncture rod 400, and the other end of the puncture knife 300 is installed at the bottom of the mounting cavity. One end of the return spring 500 is connected to the mounting protrusion 410, and the other end of the return spring 500 is installed at the bottom of the mounting cavity. When the user presses the cover body 100, the return spring 500 is compressed, and the puncture knife 300 is pushed out from the puncture rod 400. When the user stops pressing the cover body 100, the return spring 500 returns, and the puncture knife 300 retracts into the puncture rod 400, effectively improving the safety of the puncture device.
[0030] It should be noted that the mounting protrusion 410 includes a first mounting protrusion and a second mounting protrusion, the first mounting protrusion and the second mounting protrusion are arranged oppositely, the mounting groove 211 includes a first mounting groove and a second mounting groove, the clamping groove 212 includes a first clamping groove and a second clamping groove, the first mounting groove and the second mounting groove are arranged oppositely, and the first clamping groove and the second clamping groove are arranged oppositely. By setting the first mounting protrusion and the second mounting protrusion, the stability of the puncture rod 400 can be improved.
[0031] It should be noted that a convex ring 420 is provided at one end of the puncture rod 400 away from the cover body 100, and the convex ring 420 is inclined inward along the length direction of the puncture rod 400.
[0032] It should be noted that a fixing groove 110 and a limiting block 120 for restricting the return spring 500 are further provided at the bottom of the installation cavity. The other end of the puncture knife 300 is installed in the fixing groove 110. The return spring 500 is sleeved outside the fixing groove 110, and the return spring 500 is located between the fixing groove 110 and the limiting block 120. By arranging the return spring 500 between the fixing groove 110 and the limiting block 120, the return spring 500 can be limited to prevent the return spring 500 from being misaligned, which may otherwise cause the puncture rod 400 to fail to return to its normal position.
[0033] It should be noted that the puncture device further includes an elastic switch 600. A first clamping position 130 is provided on the inner wall of the installation cavity. The elastic switch 600 includes a first buckle 620 and a second clamping position 610 that matches the first clamping position 130. The first clamping position 130 and the second clamping position 610 are in mutual abutment. A fixing hole 220 is further opened on the bottom plate 200. The first buckle 620 passes through the fixing hole 220. By the mutual abutment of the first clamping position 130 and the second clamping position 610, the elastic switch 600 can be fixed in the installation cavity, and by passing the first buckle 620 through the fixing hole 220, the bottom plate 200 can be fixed to the bottom of the cover body 100.
[0034] Refer to Figure 1 and Figure 3 , a protective cover 430 is further provided on the puncture rod 400. A puncture portion 310 is provided at one end of the puncture knife 300. The protective cover 430 is sleeved on the puncture portion 310, and the end of the protective cover 430 matches the puncture portion 310. When the puncture rod 400 compresses the return spring 500 and the puncture knife 300 extends out of the protective cover 430, a normal puncture operation can be performed. When the pressure at the front end of the puncture rod 400 disappears, the return spring 500 resets, so that the puncture knife 300 can be hidden in the protective cover 430. By hiding the puncture knife 300 with the protective cover 430, it can not only prevent the puncture knife 300 from being contaminated, but also avoid the puncture knife 300 from protruding and accidentally injuring medical staff, ensuring the safety and reliability of the puncture device.
[0035] It should be noted that the puncture portion 310 is a double-edged blade, and the protective cover 430 is provided with a puncture end with a double-edged structure. Both the puncture knife 300 and the puncture end adopt a double-edged design, which can accurately reach the puncture position. The double-edged blade is easier to cut muscle, which is beneficial to improving the working performance of the puncture device and thus increasing the success rate of the puncture operation.
[0036] It should be noted that the double-edged blade includes a blade body and a blade tip, and the side walls of the blade body and the blade tip are smoothly connected in a transitional manner. By making the side walls of the blade body and the blade tip smoothly connected in a transitional manner, the shape of the tissue incision can be effectively protected during the puncture process, reducing the degree of tissue damage and making the incised tissue easier to heal. Among them, the blade body and the blade tip are integrally formed, which is convenient for assembly and production.
[0037] It should be noted that the puncture rod 400 is provided with a second buckle 421, and the protective cover 430 is provided with a first card slot 431 that matches the second buckle 421. By providing the second buckle 421 and the first card slot 431, the protective cover 430 can be stably connected to the puncture rod 400, the assembly is simple and convenient, and the cumbersome steps of installation can be effectively reduced.
[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.
Claims
1. A trocar, characterized in that: include: A cover body, wherein the bottom of the cover body is recessed upward to form a mounting cavity; A bottom plate, the bottom plate is mounted on the bottom of the cover body, the bottom plate is provided with a mounting hole, the inner wall of the mounting hole is provided with a mounting groove and a locking groove, the mounting groove and the locking groove are evenly spaced along the circumference of the mounting hole, and the cross-sectional area of the mounting groove is larger than the cross-sectional area of the locking groove; A puncture rod, one end of which is provided with a mounting protrusion, the puncture rod is inserted into the mounting hole, the mounting protrusion is located in the mounting cavity, and the shape of the mounting protrusion is the same as the shape of the mounting groove; A puncture knife, one end of which is inserted into the puncture rod, and the other end of which is installed at the bottom of the installation cavity; A return spring is arranged in the installation cavity, one end of the return spring is connected to the installation protrusion, and the other end of the return spring is connected to the bottom of the installation cavity.
2. The trocar according to claim 1, characterized in that: The mounting groove includes a first mounting groove and a second mounting groove, the locking groove includes a first locking groove and a second locking groove, the first mounting groove and the second mounting groove are arranged opposite to each other, the first locking groove and the second locking groove are arranged opposite to each other, and the mounting protrusion includes a first mounting protrusion and a second mounting protrusion, the first mounting protrusion and the second mounting protrusion are arranged opposite to each other.
3. The trocar according to claim 1, characterized in that: A fixing groove and a limit block for limiting a return spring are also provided at the bottom of the installation cavity, the other end of the puncture knife is installed in the fixing groove, the return spring is sleeved on the outside of the fixing groove, and the return spring is located between the fixing groove and the limit block.
4. The trocar according to claim 1, characterized in that: It also includes an elastic switch, the inner wall of the installation cavity is provided with a first clamping position, the elastic switch is provided with a second clamping position matching the first clamping position, and the first clamping position and the second clamping position abut against each other.
5. The trocar according to claim 4, characterized in that: The elastic switch is further provided with a first buckle, and the bottom plate is further provided with a fixing hole, and the first buckle is passed through the fixing hole.
6. The trocar according to claim 1, characterized in that: The puncture rod is provided with a protective cover, one end of the puncture knife is provided with a puncture portion, the protective cover is sleeved on the puncture portion, and the end of the protective cover matches the puncture portion.
7. The trocar according to claim 6, characterized in that: The puncture part is a double-edged blade, and the protective cover is provided with a puncture end with a double-edged structure.
8. The trocar according to claim 7, characterized in that: The double-edged blade comprises a blade body and a blade head, and the blade body is smoothly transitionally connected to the side wall of the blade head.
9. The trocar according to claim 6, characterized in that: The puncture rod is provided with a second buckle, and the protection cover is provided with a first buckle slot matching the second buckle.
10. The trocar according to claim 1, characterized in that: A convex ring is arranged at one end of the puncture rod away from the cover body, and the convex ring is inclined inwardly along the length direction of the puncture rod.