CN108421909B

CN108421909B - Pressure riveting clamp for processing suture needle and pressure riveting method thereof

Info

Publication number: CN108421909B
Application number: CN201810558222.3A
Authority: CN
Inventors: 晏伟; 魏征; 谢建
Original assignee: Puyi Shanghai Biotechnology Co ltd
Current assignee: Puyi Shanghai Biotechnology Co ltd
Priority date: 2018-06-01
Filing date: 2018-06-01
Publication date: 2022-06-24
Anticipated expiration: 2038-06-01
Also published as: CN108421909A

Abstract

The invention relates to a riveting clamp for processing a suture needle, wherein a blank body of the suture needle comprises a main body and a suture line, and the riveting clamp comprises: the upper die comprises an upper die with an upper pressing block, wherein an upper die half groove is formed in the front end surface of the upper die of the upper pressing block, and a bulge is arranged in the upper die half groove; the lower die is provided with a punching needle and a lower pressing block, a lower die half groove is formed in the front end face of the lower die of the lower pressing block, a penetrating punching hole is formed in the lower die half groove, and the punching needle can penetrate out through the punching hole in a sliding manner; wherein the upper and lower die half-grooves define a receiving space for the body, and the projections and punch pins are on opposite sides of and directly against the suture. The invention provides a riveting method for processing a sewing needle. The invention fixes the suture line on the main body by pressing and riveting the bulge and the punching needle which are arranged on the two sides of the suture part and are opposite to the suture line.

Description

Pressure riveting clamp for processing suture needle and pressure riveting method thereof

Technical Field

The invention relates to processing of a sewing needle, in particular to a riveting clamp and a riveting method thereof for processing the sewing needle.

Background

The suture needle is an instrument for surgical suture, and is mostly made of stainless steel wires through drilling or slotting on the tail of the needle. In order to secure the suture to the stainless steel wire of the needle, it is known to use glue for bonding. However, the glue dispensing usually has a problem that the glue amount cannot be accurately controlled. If the excess glue is absorbed by the suture, the flexibility of the suture is affected, which increases the difficulty of suturing for the operator and the pain of the patient. In addition, the prior art also discloses a mode of threading a suture in two threading holes which are connected in series. However, the series holes are difficult to process, often difficult to implement, and the threading does not require double-thread fixation, which adds difficulty to conventional surgical suturing that requires only a single thread.

Disclosure of Invention

In order to solve the problem that the suture line in the prior art cannot be effectively fixed, the invention aims to provide a riveting clamp for processing a suture needle and a riveting method thereof.

The invention provides a riveting clamp for processing a suture needle, wherein a blank body of the suture needle comprises a main body and a suture line, and the riveting clamp comprises: the upper die comprises an upper die with an upper pressing block, wherein an upper die half groove is formed in the front end surface of the upper die of the upper pressing block, and a bulge is arranged in the upper die half groove; the lower die is provided with a punching needle and a lower pressing block, a lower die half groove is formed in the front end face of the lower die of the lower pressing block, a penetrating punching hole is formed in the lower die half groove, and the punching needle can penetrate out through the punching hole in a sliding manner; wherein the upper and lower die half-grooves define a receiving space for the body, and the projections and punch pins are on opposite sides of and directly against the suture.

The lower die comprises a fixing plate, a guide pin, an elastic body and a pressing plate, wherein the pressing plate is relatively fixed with the fixing plate through the guide pin, the elastic body is arranged between the pressing plate and the fixing plate, a lower pressing block is fixed on the surface of the pressing plate, which faces the upper die, and a punching needle is fixed on the fixing plate, penetrates through the elastic body and the pressing plate and penetrates out of the lower pressing block.

The guide pin is provided with a threaded section, a cylindrical section and a large head end, wherein the cylindrical section is positioned between the threaded section and the large head end; the fixing plate is provided with a step hole, and the cylindrical section of the guide pin can slide in the step hole; the clamp plate has the screw hole, and the screw thread section of pilot pin is fixed through screw thread tightening with the screw hole.

The surface of the fixing plate facing the pressure plate has a concave circular groove in which the distal end of the elastic body facing the fixing plate is received, the diameter of the circular groove being larger than the outer diameter of the elastic body.

The lower pressing block is provided with a slit which is perpendicular to the half groove of the lower die and is recessed from the front end surface of the lower die and used for accommodating a suture.

The invention provides a press riveting method for processing a suture needle, wherein a blank body of the suture needle comprises a main body and a suture line, and the press riveting method comprises the following steps: s1, fixing the punch pin and the lower pressing block; s2, aligning the upper die half groove of the upper pressing block and the lower die half groove of the lower pressing block in parallel; s3, after the suture passes through the round hole of the main body, the main body is placed into the lower die half groove, the upper pressing block is driven to move towards the lower pressing block, and the protrusion in the upper die half groove contacts the main body on one side of the suture and deforms the main body to form a first dent; and S4, continuously driving the upper pressing block to move towards the lower pressing block, wherein the front end face of the upper die is contacted with the front end face of the lower die, and the punching needle extends out of the punched hole of the half groove of the lower die and is contacted with the main body at the other opposite side of the sewing line to deform the main body to form a second dent.

Fixing the punching needle on the fixing plate, sleeving the elastic body on the punching needle and accommodating the elastic body in the circular groove of the fixing plate; and fixing the lower pressing block on the pressing plate, and connecting the pressing plate and the fixing plate together through the guide pin to complete the installation of the lower die.

After the main body is placed into the half groove of the lower die, the suture line is accommodated in the slit and then pulled by two hands respectively, so that the suture line is tensioned in the slit, and the axis of the round hole of the main body is parallel to the front end face of the lower die of the lower pressing block.

When the first dent is consistent with the second dent, the round hole is deformed into a gap to compress the suture.

The invention fixes the suture line on the main body by pressing and riveting the bulge and the punching needle which are arranged on the two sides of the suture part and are opposite to the suture line. Compared with the glue dispensing and fixing in the prior art, the method disclosed by the invention not only avoids the influence of glue on the flexibility of the seam, but also fixes the strength and temperature. Compared with the threading and fixing in the prior art, the invention does not need to use double lines, has low processing difficulty and saves cost.

Drawings

FIG. 1 is a schematic view showing the general construction of a clinch jig for processing a sewing needle according to the present invention;

FIG. 2 shows the blank of the suture needle prior to processing;

FIG. 3 is an enlarged view of the upper die of FIG. 1;

FIG. 4 is an enlarged view of the lower pressure block of FIG. 1;

FIG. 5 shows a green body disposed on a lower compact;

FIG. 6 shows the suture needle after processing.

Detailed Description

The following description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings and will be described in detail.

According to one aspect of the present invention, there is provided a clinch clip 2 for use in processing a suture needle, as shown in FIG. 1. FIG. 2 shows a blank 1 ' of a suture needle prior to processing, comprising a body 11 ' and a suture 12 ', the body 11 ' being provided with a pointed end 111 ' for piercing for suturing. The body 11 ' is formed at its central portion with a circular hole 112 ', through which the suture 12 ' extends. The clinch clip 2 is used to secure the suture 12 'within the circular aperture 112'. Specifically, as shown in fig. 1, the clinch jig 2 includes an upper die 21 and a lower die 22, and clinch fixing of the sewing thread 12' is achieved by cooperation of the upper die 21 and the lower die 22.

Fig. 3 is an enlarged view of the upper die of fig. 1, wherein the upper die 21 has an upper presser 211 having an upper die half groove 2112 corresponding to the contour of the main body 11' opened in an upper die front end surface 2111 facing the lower die 22. A protrusion 2113 for pressing the body 11' is provided in the upper semicircular groove 2112.

Returning to fig. 1, the lower die 22 includes a fixing plate 221, a guide pin 222, a punch pin 223, an elastic body 224, a pressing plate 225, and a lower pressing block 226, wherein the pressing plate 225 is fixed to the fixing plate 221 through the guide pin 222, the elastic body 224 is disposed between the pressing plate 225 and the fixing plate 221, the lower pressing block 226 is fixed to a surface of the pressing plate 225 facing the upper die 21, the punch pin 223 is fixed to the fixing plate 221 and can pass through the elastic body 224 and the pressing plate 225 and pass out from the lower pressing block 226, that is, a surface of the punch pin 223 facing the upper die 21 is formed as a pressure contact surface for the clinching body 11'. In the present embodiment, the elastomer 224 is a polyurethane PU elastomer, i.e., a high-tenacity rubber. Preferably, the elastic body 224 is a cylindrical sheet with a hole in the middle. In the present embodiment, the guide pin 222 has a threaded section 2221, a cylindrical section 2222, and a large head end 2223, wherein the cylindrical section 2222 is located between the threaded section 2221 and the large head end 2223.

More specifically, the fixing plate 221 is a rectangular plate, four corners of which are provided with stepped holes 2211, the guide pin 222 is inserted into the stepped holes 2211 to be fitted, and particularly, the cylindrical section 2222 of the guide pin 222 has a diameter smaller than the inner diameter of the stepped hole 2211 so as to be slidable in the stepped hole 2211, and the sliding distance is limited by the position of the large end 2223 of the guide pin 222. The fixing plate 221 has a square hole 2212 at the center, and the rear end of the punch pin 223 away from the upper die 21 is inserted into the square hole 2212 for fixing. In addition, the fixing plate 221 has a circular groove 2213 recessed on a surface thereof facing the pressing plate 225, and the end of the elastic body 224 facing the fixing plate 221 is received in the circular groove 2213. It should be understood that the diameter of the circular groove 2213 is slightly larger than the outer diameter of the elastic body 224, so that a gap is left between the circumferential side wall of the elastic body 224 and the fixing plate 221 to provide a clearance for deformation of the elastic body 224 in the case of being crushed.

Similarly, the pressing plate 225 is a rectangular plate, and four screw holes 2251 are formed at corners thereof, and the guide pin 222 is inserted into the screw holes 2251 to be engaged therewith, and in particular, the threaded section 2221 of the guide pin 222 is screwed into the screw holes 2251. Thus, the elastic body 224 is compressed between and integrally connected to the pressing plate 225 and the fixing plate 221.

In the present embodiment, the punching pin 223 has a quadrangular prism shape, and a punch 2231 for punching the body 11' is formed at an end thereof facing the upper die 21.

Fig. 4 is an enlarged view of the lower press block of fig. 1, in which the center of the lower press block 216 has a punching hole 2261 for allowing the punching needle 223 (particularly the punch 2231) to slide out and act on the body 11'. A lower tool semi-circular groove 2263 corresponding to the contour of the main body 11 'is formed in a lower tool front end surface 2262 of the lower pressing block 216 facing the upper tool 21, and defines a space for accommodating the main body 11' together with the upper tool semi-circular groove 2112 of the upper tool front end surface 2111 of the upper pressing block 211. In addition, lower press block 216 has a slot 2264 perpendicular to the lower die half-circular groove 2263 and recessed from the lower die front face 2262 for receiving suture 12'.

According to another aspect of the present invention, there is provided a method of processing a sewing needle 1 using a clinch jig 2, comprising the steps of:

s1, referring to fig. 1, fixing the punch pin 223 in the square hole 2212 of the fixing plate 221, and sleeving the elastic body 224 on the punch pin 223 and accommodating it in the circular groove 2213 of the fixing plate 221; fixing the pressing block 226 on the pressing plate 225, and connecting the pressing plate 225 and the fixing plate 221 through the guide pin 222; thereby completing the installation of the lower mold 22;

s2, aligning the upper mold half-round grooves 2112 (see fig. 3) of the upper mold 21 in parallel with the lower mold half-round grooves 2263 (see fig. 4) of the lower mold 22, ensuring the center alignment of the upper and

lower molds

21 and 22 so that the punch 2231 can be punched out vertically from the lower mold 22, see fig. 1;

s3, passing the suture 12 'through the circular hole 112' of the body 11 ', then placing the body 11' into the lower mold half-circular grooves 2263 (see fig. 4), receiving the suture 12 'in the slit 2264 (see fig. 4) and then pulling the suture 12' with both hands, respectively, so that the suture 12 'is tensioned in the slit 2264, such that the axis of the circular hole 112' of the body 11 'is parallel to the lower mold front end surface 2262 of the lower pressing block 216, as shown in fig. 5, and then driving the upper mold 21 toward the lower mold 22, such that the protrusion 2113 (see fig. 3) first contacts the body 11', forming an indentation in the body 11 'and forcing the circular hole 112' on the body 11 'to deform into a half-circular-like hole to press the suture 12';

s4, the upper die 21 is driven to move towards the lower die 22, the front end surface 2111 (see fig. 3) of the upper die contacts with the front end surface 2262 (see fig. 4) of the lower die and presses the lower pressing block 216, the elastic body 224 is deformed by the pressing force, the upper pressing head 21, the main body 11 ', the lower pressing block 226, the pressing plate 225 and the guide pin 222 move together, the punch 2231 of the punch 223 is exposed from the punch 2261 (see fig. 4) during the moving process because the fixing plate 211 is kept still and the punch 223 is fixed in length, an indentation is formed on the main body 11' and the semicircular-like hole on the main body 11 'is forced to be further deformed into a gap to press the suture thread 12'. When the indentation formed on the body 11 ' by the protrusion 2113 coincides with the indentation formed on the body 11 ' by the punch pin 223, the circular hole is deformed into a slit to press the suture thread 12 ', and the clinching is completed.

Fig. 6 shows the suture needle 1 after processing, which comprises a needle body 11 and a suture thread 12, wherein the suture thread 12 is fixed at the middle part of the needle body 11 by means of threading and clinching. The two opposite ends of the needle body 11 are provided with tip ends 111 for puncturing and suturing, and due to the two tip ends 111, the needle can continuously puncture and suture in the nasal cavity in use, when a doctor punctures the suture needle from one end and pulls out the other end, the direction does not need to be changed, the suture tissue can be directly punctured by the other end in the nasal cavity again, the suture end is pulled out of the suture line and knotted repeatedly, and therefore the double-head suture needle capable of achieving bidirectional suturing in a narrow space is provided. The needle body 11 has a slit 112 at a middle portion thereof, and the suture thread 12 is fixed in the slit 112 by an interference fit. Wherein the length of the slit 112 is between one hundredth and one eighty of the length of the needle body 11. The needle body 11 has opposite first and

second indents

113 and 114 on both sides of the slit 112. Preferably, the first indentation 113 and the second indentation 114 are identical. The first indentation 113 has a rectangular cross-section with a depth of between one tenth and one fifth of the diameter of the needle body 11. The second indentation 114 likewise has a rectangular cross-section with a depth of between one tenth and one fifth of the diameter of the needle body 11. It should be understood that the cross-section of the first and

second indentations

113 and 114 may also be circular or the like, which is determined by the shape of the protrusion 2113 and the punch 2231 of the die 2. In the present embodiment, the needle body 11 is linear. It should be understood that the needle body 11 may alternatively be curved as desired. In the present embodiment, the tip 111 has a circular cross-section. It should be understood that the cross-section of the tip 111 may be selected to be triangular, elliptical, or more positive deformations depending on the piercing force requirements of the suture site.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.

Claims

1. A press riveting method for processing a suture needle is characterized in that the press riveting method comprises the following steps:

s1, fixing the punch needle and the lower pressing block, wherein the lower pressing block is provided with a lower die half groove in the front end face of the lower die and a slit which is perpendicular to the lower die half groove and is recessed from the front end face of the lower die and used for accommodating a suture line;

s2, aligning the upper die half groove of the upper pressing block and the lower die half groove of the lower pressing block in parallel;

s3, after the suture passes through the circular hole of the main body, the main body is placed into the lower die half groove, after the suture is accommodated in the slit, the suture is pulled by two hands respectively, so that the suture is tensioned in the slit, the axis of the circular hole of the main body is parallel to the front end face of the lower die of the lower pressing block, the upper pressing block is driven to move towards the lower pressing block, and the bulge in the upper die half groove contacts the main body on one side of the suture and deforms the suture to form a first dent;

and S4, continuously driving the upper pressing block to move towards the lower pressing block, wherein the front end face of the upper die is contacted with the front end face of the lower die, and the punching needle extends out of the punched hole of the half groove of the lower die and is contacted with the main body at the other opposite side of the sewing line to deform the main body to form a second dent.

2. The clinching method of claim 1, wherein the punch pin is fixed to the fixing plate, and the elastic body is fitted over the punch pin and received in the circular groove of the fixing plate; and fixing the lower pressing block on the pressing plate, and connecting the pressing plate and the fixing plate together through the guide pin to complete the installation of the lower die.

3. A clinching method according to claim 1, wherein the circular hole is deformed into a slit to compress the seam when the first indent coincides with the second indent.