A piercing core rod by heat staking

Abstract

The present application relates to a kind of puncture core rod by hot melt riveting, it includes core rod and handle arranged in the rear of core rod, the handle includes the lower cover connected with the rear end of core rod, upper cover is arranged on the lower cover;The rear end of the core rod is provided with the flange that extends outward, the flange is provided with positioning slot A;The lower cover is provided with the through hole A that core rod passes, the edge of through hole A is provided with rivet post B for being clamped with positioning slot A;The upper cover is provided with the positioning hole matched with rivet post B, and rivet post B is fixedly connected with the positioning hole after heating melting, the fixed connection of core rod, lower cover, upper cover is realized.The puncture core rod of the present application, the core rod, lower cover and upper cover of the present application, are assembled by the riveting mode of lower cover and upper cover, rivet each component into a whole, can guarantee that the entire puncture core rod has higher strength;Each component structure is simple, has the characteristics of more simple production, assembly mode.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a puncture core rod that is joined by thermofusion riveting. Background Technology

[0002] Laparoscopic surgery is a highly efficient, minimally invasive, and extremely safe surgical procedure that has gained popularity and acceptance among patients and doctors. During the procedure, the surgeon first makes a small incision, then inserts a mandrel through the incision site into the abdominal cavity, thoracic cavity, or other areas where an instrument channel needs to be established, thus creating a passage for the surgical instruments. Therefore, the mandrel needs sufficient strength to penetrate human skin tissue. Currently, there are two main structural types of mandrels: (1) entirely made of plastic; (2) the mandrel is metal with injection-molded inserts. However, mandrels made entirely of plastic have lower strength, and the mandrel mold is large and complex; while mandrels made of metal with injection-molded inserts have a complex manufacturing process and more complex molds. Summary of the Invention

[0003] The purpose of this invention is to provide a piercing core rod that is joined by hot melt riveting, in order to overcome the shortcomings of the prior art.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A piercing core rod joined by heat fusion riveting includes a core rod and a handle disposed at the rear of the core rod. The handle includes a lower cover connected to the rear end of the core rod and an upper cover disposed on the lower cover and joined to the lower cover by heat fusion riveting.

[0006] The rear end of the core rod is provided with an outwardly extending convex edge, and the convex edge is provided with a positioning groove A;

[0007] The lower cover is provided with a through hole A through which the core rod passes, and the edge of the through hole A is provided with a rivet B for engaging with the positioning groove A;

[0008] The upper cover has a through hole B that communicates with through hole A, and the upper cover has a positioning hole that matches the rivet B. The heated and melted rivet B is fixedly connected to the positioning hole, thereby realizing the fixed connection of the core rod, the lower cover, and the upper cover.

[0009] Compared with the prior art, the advantages of the present invention are as follows:

[0010] 1. The puncture core rod of the present invention, wherein the core rod, the lower cover and the upper cover are assembled by riveting the lower cover and the upper cover together, so that the components are riveted into a whole, which can ensure that the entire puncture core rod has high strength.

[0011] 2. The puncture core rod of the present invention has a simple structure of each component, and has the characteristics of simpler production and assembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 This is a structural diagram of the core rod.

[0014] Figure 3 This is a structural diagram of the lower cover.

[0015] Figure 4 This is a schematic diagram of the top cover.

[0016] Figure 5 This is a partial cross-sectional view of the puncture core rod.

[0017] Figure 6 This is a schematic diagram of the riveting process.

[0018] Figure 7 yes Figure 6 A magnified view of A in the middle.

[0019] Figure 8 It is an assembly flowchart of the core rod, lower cover, and upper cover.

[0020] Labeling Explanation: 1. Core Rod, 2. Handle, 3. Lower Cover, 4. Upper Cover, 5. Handle Button, 6. Handle Rear Cover, 7. Raised Edge, 8. Through Hole A, 9. Rivet B, 10. Rivet A, 11. Positioning Hole, 12. Positioning Slot A, 13. Positioning Slot B, 14. Core Rod Fixing Block, 15. Relief Slot A, 16. Relief Slot B, 17. Slot Hole, 18. Handle Pressure Cover, 19. Positioning Post, 20. Slot, 21. Rotating Shaft, 22. Through Hole B, 23. Through Hole C, 24. Through Hole D, 25. Locking Block, 26. Slot, 27. Pin. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0022] like Figures 1 to 5 The diagram shown is a schematic representation of an embodiment of a piercing core rod provided by the present invention, which is joined by thermofusion riveting.

[0023] The piercing core rod, which is riveted by hot melt, includes a core rod 1 and a handle 2 located behind the core rod 1. The handle 2 includes a lower cover 3 connected to the rear end of the core rod 1, an upper cover 4 located on the lower cover 3, a handle button 5 located behind the upper cover 4, and a handle rear cover 6 located behind the handle button 5 and connected to the lower cover 3.

[0024] The rear end of the core rod 1 is provided with an outwardly extending protrusion 7, and the protrusion 7 is provided with a positioning groove A12;

[0025] The lower cover 3 is provided with a through hole A8 through which the core rod 1 passes, and the edge of the through hole A8 is provided with a rivet B9 for engaging with the positioning groove A12;

[0026] The upper cover 4 is provided with a through hole B22 that communicates with the through hole A8. The upper cover 4 is provided with a positioning hole 11 that matches the rivet B9. The heated and melted rivet B9 is fixedly connected to the positioning hole 11, thereby realizing the fixed connection of the core rod 1, the lower cover 3, and the upper cover 4.

[0027] There are two protruding edges 7, which are symmetrically arranged with the central axis of the core rod 1 as the axis of symmetry. One of the protruding edges 7 is provided with the positioning groove A12, and the other protruding edge 7 is provided with the positioning groove B13. The lower cover 3 is provided with a positioning post 19 that engages with the positioning groove B13.

[0028] The rear end face of the lower cover 3 is provided with several rearward extending pins, and the handle rear cover 6 is provided with several insertion holes that match the pins. The pins are inserted into the insertion holes to connect the handle rear cover 6 with the lower cover 3.

[0029] The upper cover 4 and the lower cover 3 are respectively provided with a core rod fixing block 14 that extends forward and is used to engage the outer periphery of the rear end of the core rod 1.

[0030] The core rod fixing block 14 of the upper cover 4 and the core rod fixing block 14 of the lower cover 3 are combined to form a hollow circular cylinder that snaps onto the outer periphery of the rear end of the core rod 1.

[0031] The edge of the through hole A8 is also provided with a relief groove A15 for the passage of the protruding edge 7.

[0032] The core rod fixing block 14 on the upper cover 4 is engaged with the outer periphery of the rear end of the core rod 1 via the clearance groove A15, and the core rod fixing block 14 on the lower cover 3 is respectively located at the positions of the rivet post B9 and the positioning post 19.

[0033] The rear end face of the lower cover 3 is also provided with several rearwardly extending rivet posts A10. The number of positioning holes 11 on the upper cover 4 matches the number of rivet posts A10 and rivet posts B9. The heated and molten rivet posts A10 are fixedly connected to the corresponding positioning holes 11. The rivet posts B9 and rivet posts A10 are slightly higher than the positioning holes 11, and the inner hole of the upper edge of the positioning hole 11 has an overflow groove.

[0034] The handle 2 also includes a handle cover 18 for controlling the insertion and removal of the endoscope; the rear end face of the lower cover 3 is provided with two slots 20 spaced apart, the side wall of the handle cover 18 is provided with a rotating shaft 21 that is engaged in the corresponding slot 20, the lower cover 3 is provided with a slot 17 for accommodating the handle cover 18, and the edge of the through hole B22 of the upper cover 4 is provided with a relief groove B16 for accommodating the handle cover 18.

[0035] The handle button 5 and the handle back cover 6 are respectively provided with through holes C23 and D24 that communicate with through hole A8. Through holes A8, B22, C23 and D24 form a channel for the endoscope to pass through.

[0036] The lower cover 3 is also provided with two slots 26 symmetrically arranged with the central axis of the through hole A8 as the axis of symmetry. The handle button 5 is provided with two downwardly extending locking blocks 25, which are respectively inserted into the corresponding slots 26.

[0037] The handle button 5 is located behind the upper cover 4 and is engaged with the slot 26 via the locking block 25, thereby connecting the handle button 5 to the lower cover 3.

[0038] The front end of the core rod 1 is also provided with a needle 27. The tip of the needle 27 is made of transparent material.

[0039] Piercing core assembly process:

[0040] 1) First, assemble the core rod 1 with the needle 27;

[0041] 2) After the rear end protrusion 7 of the core rod 1 passes through the through hole A8 and the relief groove A15 through the lower cover 3, it is rotated to make the positioning groove A12 engage with the rivet B9 of the lower cover 3, and the positioning groove B13 engage with the positioning post 19, thereby restricting the core rod 1. Adjust the Z-direction position of the core rod 1 so that the protrusion 7 of the core rod 1 fits against the lower cover 3.

[0042] 3) The core rod fixing block 14 of the upper cover 4 passes through the through hole A8 and the relief groove A15 of the lower cover 3 and combines with the core rod fixing block 14 of the lower cover 3 to form a hollow annular column that snaps onto the outer periphery of the rear end of the core rod 1. The rivet A10 and rivet B9 of the lower cover 3 pass through the positioning hole 11 of the upper cover 4, so that the upper cover 4 and the lower cover 3 are relatively fixed. At this time, the protruding edge 7 structure of the core rod 1 is fixed between the upper cover 4 and the lower cover 3.

[0043] 4) Riveting: Place the assembled core rod 1, upper cover 4, and lower cover 3 on the riveting fixture. Fix the rivet head on the riveting equipment, heat it to a certain temperature, and then move it downwards. Since the height of each rivet post of the lower cover 3 is higher than the height of the positioning hole 11 of the upper cover 4, the rivet head first contacts rivet posts B9 and A10. The high temperature of the rivet head causes rivet posts B9 and A10 to melt. The rivet head continues to move downwards to the plane of the positioning hole 11 and then moves upwards. At this time, the molten rivet posts B9 and A10 are fused together with the upper cover 4. After cooling, the core rod 1, upper cover 4, and lower cover 3 form a high-strength whole.

[0044] 5) Install the handle button 5, handle back cover 6, and handle pressure cover 18 into their respective positions to complete the assembly:

[0045] The handle button 5 is located behind the upper cover 4, ensuring that the through hole C23 and the through hole B22 are aligned and connected. The locking block 25 of the handle button 5 is engaged with the slot 26 on the lower cover 3, so that the handle button 5 is connected to the lower cover 3.

[0046] The pivot 21 of the handle cover 18 is correspondingly engaged in the slot 20 of the lower cover 3, and the handle cover 18 is disposed in the slot 17 of the lower cover 3 and the clearance slot B16 of the upper cover 4.

[0047] The handle back cover 6 is located behind the handle button 5, and the insertion hole on the handle back cover 6 is connected to the pin on the lower cover 3, so that the handle back cover 6 and the lower cover 3 are connected, thus completing the assembly of the entire piercing core rod.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A piercing core rod joined by hot-melt riveting, comprising a core rod (1) and a handle (2) disposed behind the core rod (1), characterized in that: The handle (2) includes a lower cover (3) connected to the rear end of the core rod (1) and an upper cover (4) disposed on the lower cover (3) and connected to the lower cover (3) by hot-melt riveting. The rear end of the core rod (1) is provided with an outwardly extending protrusion (7), and the protrusion (7) is provided with a positioning groove A (12). The lower cover (3) is provided with a through hole A (8) through which the core rod (1) passes, and the edge of the through hole A (8) is provided with a rivet B (9) for engaging with the positioning groove A (12). The upper cover (4) is provided with a through hole B (22) that communicates with the through hole A (8). The upper cover (4) is provided with a positioning hole (11) that matches the rivet B (9). The heated and melted rivet B (9) is fixedly connected to the positioning hole (11) to realize the fixed connection of the core rod (1), the lower cover (3), and the upper cover (4). The rear end face of the lower cover (3) is also provided with a number of rearwardly extending rivet posts A (10), and the number of positioning holes (11) on the upper cover (4) matches the number of rivet posts A (10) and rivet posts B (9). The heated and melted rivet posts A (10) are fixedly connected to the corresponding positioning holes (11). The upper cover (4) and the lower cover (3) are respectively provided with a core rod fixing block (14) that extends forward and is used to snap the core rod (1) to the outer periphery of the rear end. The core rod fixing block (14) of the upper cover (4) and the core rod fixing block (14) of the lower cover (3) are combined to form a hollow circular cylinder that snaps onto the outer periphery of the rear end of the core rod (1); The edge of the through hole A (8) is also provided with a relief groove A (15) through which the protruding edge (7) passes.

2. The piercing core rod by hot-melt riveting according to claim 1, characterized in that: There are two protruding edges (7), and the two protruding edges (7) are symmetrically arranged with the central axis of the core rod (1) as the axis of symmetry. One of the protruding edges (7) is provided with the positioning groove A (12), and the other protruding edge (7) is provided with the positioning groove B (13). The lower cover (3) is provided with a positioning post (19) that engages with the positioning groove B (13).

3. A piercing core rod joined by hot-melt riveting according to claim 1, characterized in that: The handle (2) also includes a handle cover (18) for controlling the insertion and removal of the endoscope; the rear end face of the lower cover (3) is provided with two slots (20) spaced apart, the side wall of the handle cover (18) is provided with a rotating shaft (21) that is engaged in the corresponding slot (20), the lower cover (3) is provided with a slot (17) for accommodating the handle cover (18), and the edge of the through hole B (22) of the upper cover (4) is provided with a relief groove B (16) for accommodating the handle cover (18).

4. A piercing core rod joined by hot-melt riveting according to claim 1, characterized in that: The handle (2) also includes a handle button (5) located behind the upper cover (4) and a handle rear cover (6) located behind the handle button (5) and connected to the lower cover (3). The lower cover (3) is also provided with two slots (26) symmetrically arranged with the central axis of the through hole A (8) as the axis of symmetry. The handle button (5) is provided with two downwardly extending blocks (25), and the two blocks (25) are respectively inserted into the corresponding slots (26).

5. A piercing core rod joined by hot-melt riveting according to claim 1, characterized in that: The front end of the core rod (1) is also provided with a needle (27).

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