A method and apparatus for bonding puncture needles

Abstract

This invention discloses a method and apparatus for bonding puncture needles. The bonding method includes: placing the puncture needle; adjusting the vertical position of the pin abutting the lower end of the inner needle core to adjust the extension distance of the inner needle tip; injecting and curing glue at the connection between the mounting hole and the outer needle tube; moving the outer needle seat and the outer needle tube upwards; and injecting and curing glue at the connection between the upper side of the first inner through hole and the inner needle core. In this bonding method, the puncture needle is bonded by inserting the inner needle core into the outer needle tube, adjusting the extension distance of the inner needle tip beyond the outer needle tube according to the usage state, and then bonding the outer needle seat to the outer needle tube and the inner needle core to the inner needle seat. This method can accommodate dimensional or installation deviations in various components, improves the assembly accuracy of each puncture needle, and ensures that the inner needle core and outer needle tube remain essentially parallel, improving smoothness during use and thus enhancing the quality of the puncture needle.

Description

Technical Field

[0001] This invention relates to the field of medical device manufacturing technology, and in particular to a method and apparatus for bonding puncture needles. Background Technology

[0002] Percutaneous puncture needles are auxiliary guiding devices for arteriovenous interventional procedures, playing a crucial role in interventional therapy. The needle consists of an outer needle assembly and an inner needle assembly. The outer needle assembly includes a fixed outer needle hub and an outer needle tube, while the inner needle assembly includes a fixed inner needle hub and an inner core needle. During treatment, the outer and inner needle assemblies are first assembled. The inner core needle is inserted into the outer needle tube, with its tip protruding from the head of the outer needle tube. Then, the tip of the inner core needle punctures the skin and is inserted into the body along with the outer needle tube. Finally, the inner core needle is pulled out, leaving the outer needle tube connected to the body for subsequent surgical procedures.

[0003] Currently, the puncture needle is assembled manually. The outer needle tube is inserted into the outer needle seat and glued together to form the outer needle assembly. The inner needle is inserted into the inner needle seat and glued together to form the inner needle assembly. Then, the inner needle is inserted into the outer needle tube, and the outer needle seat and inner needle seat are combined to form the puncture needle.

[0004] However, this assembly method has problems with low assembly precision and difficulty in guaranteeing quality. Since the outer needle tube and the inner needle are assembled separately, when there are deviations in the size of each component or improper installation, the distance that the tip of the inner needle extends out of the outer needle tube cannot be controlled. If it extends too far, clinical medical staff cannot determine the depth when puncturing the patient. If the extension distance is insufficient, it will directly lead to failure to puncture. This is especially likely to bring medical risks, especially in high-precision surgeries. Moreover, the outer needle tube and the inner needle may not be parallel, resulting in less smooth use.

[0005] Therefore, those skilled in the art desire a new bonding method and bonding device suitable for assembling puncture needles, which can improve the assembly accuracy and quality of puncture needles. Summary of the Invention

[0006] The main objective of this invention is to propose a method and apparatus for bonding puncture needles, aiming to solve the technical problem of low assembly accuracy of puncture needles in the prior art.

[0007] To achieve the above objectives, the present invention proposes a method for bonding puncture needles, comprising the following steps:

[0008] S1: Placement of the puncture needle, wherein:

[0009] The puncture needle includes an inner needle seat, an inner core needle, an outer needle seat, and an outer needle tube. The inner needle seat is placed in a positioning groove. The lower end of the inner core needle passes through the first inner through hole of the inner needle seat. The outer needle seat is located on the upper side of the inner needle seat. The outer needle tube is sleeved on the outside of the inner core needle. The lower end of the outer needle tube passes through the mounting hole of the outer needle seat. A second inner through hole is provided on the lower side of the mounting hole. The inner core needle passes through the second inner through hole.

[0010] S2: Keep the inner needle seat and the outer needle seat, and the outer needle tube connected to the mounting hole in place. Adjust the up and down position of the pin that abuts against the lower end of the inner core needle so that the extension distance of the inner core needle tip out of the outer needle tube can be adjusted, and detect whether the extension distance reaches the preset distance.

[0011] S3: When the extension distance is detected to reach the preset distance, glue is injected into the connection position between the mounting hole and the outer needle tube, and then cured;

[0012] S4: Move the outer needle seat and the outer needle tube upward to separate the outer needle seat from the inner needle seat, exposing the upper side of the first inner through hole and the connection position with the inner core needle, while the outer needle tube remains sleeved on the outside of the inner core needle;

[0013] S5: Inject glue into the connection position between the upper side of the first inner through hole and the inner core needle, and let it cure.

[0014] In the bonding method of this invention, the bonding of the puncture needle involves inserting the inner core needle into the outer needle tube and connecting them according to the usage state. The extension distance of the inner core needle tip out of the outer needle tube is controlled by adjusting the up and down position of the top pin. After detecting the preset extension distance, the outer needle seat and outer needle tube, and the inner core needle and inner needle seat are bonded. This method can accommodate deviations in the size or installation of various components. The assembled puncture needle has a more accurate needle tip extension distance, which can improve the assembly accuracy of each puncture needle. Moreover, during bonding, the inner core needle is inside the outer needle tube, and the inner core needle and outer needle tube are basically parallel, which can improve the smoothness during use and thus improve the quality of the puncture needle.

[0015] Preferably, between steps S4 and S5, step S41 is further included: pressing the inner core needle downward so that the lower end of the inner core needle abuts against the top needle.

[0016] In step S4, because the outer needle tube and the inner core needle are closely fitted, moving the outer needle tube upwards may cause the inner core needle to move upwards as well, causing it to deviate from its adjusted position. Since the tip of the inner core needle is obscured by the upward-moving outer needle tube, its position cannot be detected. Performing the glue application in step S5 at this point could reduce assembly accuracy. Therefore, by performing step S41, pressing the inner core needle downwards until it abuts against the ejector pin, the inner core needle's position returns to the adjusted position. Then, performing the glue application in step S5 ensures the inner core needle remains in its adjusted position, improving assembly accuracy.

[0017] Preferably, after step S5, step S6 is further included: removing the inner needle seat and the inner core needle, injecting glue into the connection position between the lower side of the first inner through hole and the inner core needle, and curing it.

[0018] After the upper side of the inner needle seat is bonded and cured to the connection position of the inner core needle, remove the inner needle seat and the inner core needle. Then bond and cure the lower side of the inner needle seat to the connection position of the inner core needle. At the same time, seal the lower side of the first inner through hole. Bonding and fixing from both the upper and lower sides can improve the firmness of the connection between the inner core needle and the inner needle seat, so as to prevent the inner core needle from loosening during transportation or shifting backward under force during the use of needles due to insufficient bonding.

[0019] In another aspect, the present invention also provides an adhesive device comprising:

[0020] The base has a positioning groove for placing and positioning the inner needle seat, and the lower side of the positioning groove has an adjustment hole that runs vertically through it.

[0021] A distance detection device is disposed above the base, and the distance detection device is used to detect the extension distance of the inner core needle tip from the outer needle tube.

[0022] A first adjusting device is provided on the lower side of the base. The first adjusting device is provided with a pin, which passes through the adjusting hole. The first adjusting device can adjust the vertical position of the pin relative to the base. The pin can pass through the first inner through hole in the inner needle seat and abut against the bottom of the inner core needle inserted in the first inner through hole.

[0023] The inner needle seat is placed in the positioning groove of the base. The inner needle seat, inner core needle, outer needle seat, and outer needle tube are assembled together according to their intended use. The ejector pin enters the inner needle seat from below and abuts against the bottom of the inner core needle. The upper and lower positions of the ejector pin can be adjusted by the first adjustment device. The position of the inner core needle changes with the position of the ejector pin, thereby controlling the distance the tip of the inner core needle extends out of the outer needle tube. The distance the tip of the inner core needle extends out of the outer needle tube is detected by the distance detection device. During the adjustment process, the relative positions of the inner core needle and the outer needle tube can be controlled in real time. After the position of the inner core needle is adjusted, the outer needle seat and outer needle tube are glued and fixed, then removed. The inner needle seat and inner core needle are then glued and fixed, thus completing the bonding and assembly of the puncture needle.

[0024] In the bonding device of this invention, the bonding of the puncture needle is carried out by inserting the inner core needle into the outer needle tube, and bonding is performed after controlling the extension distance of the inner core needle tip from the outer needle tube according to the usage state. This can accommodate deviations in the size or installation of various components, and the assembled puncture needle has a more accurate needle tip extension distance, which can improve the assembly accuracy of each puncture needle. Moreover, during bonding, the inner core needle is inside the outer needle tube, and the inner core needle and the outer needle tube are basically parallel, which can improve the smoothness during use, thereby improving the quality of the puncture needle.

[0025] Preferably, the bonding device further includes a calibration seat, which is disposed above the base. The calibration seat has a first calibration groove, which is used to position the outer needle tube and the inner core needle in the middle of the length direction. The first calibration groove is directly opposite the positioning groove located on the lower side.

[0026] During assembly, the middle of the inner core needle and the outer needle tube can be placed in the first correction groove of the correction seat. The first correction groove is directly opposite the positioning groove, so that the inner core needle and the outer needle tube are kept vertical as a whole to avoid tilting with the outer needle seat and the inner needle seat. Moreover, by matching the positions of the first correction groove and the positioning groove, the inner core needle is centered in the first inner through hole of the inner core seat, and the outer needle tube is centered in the mounting hole of the outer needle seat, which further improves the assembly fit accuracy. This ensures that the inner core needle and the outer needle tube remain basically centered and parallel after rotating at different angles, further improving the smoothness of use.

[0027] Preferably, the calibration seat is provided with a magnet, which is located on the back side of the opening direction of the first calibration groove, and the magnet is used to attract the outer needle tube and the inner core needle into the first calibration groove.

[0028] The magnet on the calibration base can generate magnetic force on the outer needle tube and the inner core needle, attracting them to stay in the first calibration groove, which facilitates the positioning of the outer needle tube and the inner core needle. The structure is simple, and the magnet is placed on the back side of the opening direction of the first calibration groove, which does not obstruct the opening position of the first calibration groove. There is no need to set an additional limiting structure at the opening position of the first calibration groove. The opening position of the first calibration groove is open, which makes it easy to insert the outer needle tube and the inner core needle.

[0029] Preferably, the bonding device further includes a prompting device electrically connected to the distance detection device. The prompting device is used to issue a prompt message when the distance detection device detects that the extension distance of the inner core needle tip beyond the outer needle tube is within a preset distance. The prompting device issues a prompt message when the extension distance of the inner core needle tip beyond the outer needle tube is detected to be within the preset distance, facilitating the operator's understanding of the adjustment status.

[0030] Preferably, the bonding device further includes an upper seat, which is disposed above the base. The distance detection device is disposed on the upper seat. The upper seat is provided with a tube end indicator, which is used to align the top end face of the outer needle tube. The bonding device further includes a second adjustment device, which is connected to the upper seat and can adjust the vertical position of the upper seat relative to the base.

[0031] During installation and assembly, the position of the outer needle tube can be indicated by comparing the position of the tube end indicator with the upper end of the outer needle tube. The upper seat can be adjusted vertically by the second adjustment device so that the tube end indicator is facing the upper end of the outer needle tube. At the same time, the distance detection device also moves with the upper seat, so that the height distance between the distance detection device and the tube end indicator remains unchanged, thereby improving the accuracy of detecting the needle tip position of the inner core needle and improving the detection accuracy of the extension distance.

[0032] Preferably, the base is fixed with an upwardly extending connecting rod, the upper seat is sleeved on the connecting rod and can slide along the connecting rod, the connecting rod is provided with a threaded section, an adjusting nut is threadedly connected to the threaded section, and the upper seat abuts against the upper side of the adjusting nut.

[0033] Since the upper seat abuts against the adjusting nut, when the adjusting nut is rotated, the adjusting nut can drive the upper seat to move up and down, thereby adjusting the up and down position of the upper seat. The structure is relatively simple and easy to adjust.

[0034] Preferably, the first adjusting device includes a first bolt, and an adjusting screw hole is provided on the lower side of the adjusting hole. The screw of the first bolt is threadedly connected to the adjusting screw hole, and the ejector pin is fixed to the upper end of the screw of the first bolt. Rotating the first bolt can adjust the up and down position of the ejector pin for easy adjustment. When the ejector pin is compressed, the self-locking property of the threaded connection can be used to keep its position unchanged, making it convenient to adjust and lock the position of the ejector pin. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural diagram of the puncture needle assembly in this invention;

[0037] Figure 2 This is a cross-sectional view of the outer needle hub and outer needle tube when separated in this invention;

[0038] Figure 3 This is a cross-sectional view of the inner needle seat and inner core needle when they are separated in this invention.

[0039] Figure 4 This is a cross-sectional view of the puncture needle assembly in this invention;

[0040] Figure 5 This is a three-dimensional structural diagram of the bonding device of the present invention;

[0041] Figure 6 This is a three-dimensional structural diagram of the other side of the bonding device of the present invention;

[0042] Figure 7 This is a three-dimensional structural diagram of the puncture needle placed on the bonding device in this invention;

[0043] Figure 8 for Figure 7 A magnified view of a section at point A in the middle;

[0044] Figure 9 This is a partial cross-sectional view of the base and the first adjustment device of the present invention;

[0045] Figure 10 This is a partial cross-sectional view of step S2 in the bonding method of the present invention;

[0046] Figure 11 This is a partial cross-sectional view of step S3 in the bonding method of the present invention;

[0047] Figure 12 This is a partial cross-sectional view of steps S4 and S41 in the bonding method of the present invention.

[0048] Figure 13 This is a partial cross-sectional view of step S5 in the bonding method of the present invention;

[0049] Figure 14 This is a partial cross-sectional view of step S6 in the bonding method of the present invention.

[0050] In the attached diagram: 11-Inner needle seat, 111-First inner through hole, 12-Inner core needle, 21-Outer needle seat, 211-Mounting hole, 212-Second inner through hole, 22-Outer needle tube, 3-Base, 31-Positioning groove, 32-Adjusting hole, 33-Adjusting screw hole, 4-Distance detection device, 41-Indicating device, 5-First adjusting device, 51-First bolt, 52-Ejector pin, 6-Correction seat, 61-First correction groove, 62-Magnet, 7-Upper seat, 71-Tube end indicator, 72-Second correction groove, 8-Connecting rod, 81-Screw sleeve, 811-Threaded section, 82-Second adjusting device, 83-Adjusting nut, 9-Glue injection nozzle.

[0051] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] It should be noted that if the embodiments of the present invention involve directional indicators, such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0055] like Figures 1 to 14 As shown, an adhesive method includes the following steps:

[0056] Step S1: Place the puncture needle, wherein:

[0057] The puncture needle includes an inner needle seat 11, an inner core needle 12, an outer needle seat 21, and an outer needle tube 22. The inner needle seat 11 is placed in the positioning groove 31. The lower end of the inner core needle 12 passes through the first inner through hole 111 of the inner needle seat 11. The outer needle seat 21 is located on the upper side of the inner needle seat 11. The outer needle tube 22 is sleeved on the outside of the inner core needle 12. The lower end of the outer needle tube 22 passes through the mounting hole 211 of the outer needle seat 21. A second inner through hole 212 is provided on the lower side of the mounting hole 211. The inner core needle 12 passes through the second inner through hole 212.

[0058] The inner needle 12 can pass through the upper or lower side of the first inner through hole 111. Both the upper and lower sides of the first inner through hole 111 can be chamfered to facilitate the insertion and reception of the inner needle 12 for glue injection. The diameter of the mounting hole 211 is larger than the diameter of the second inner through hole 212. The outer needle tube 22 can only be inserted from the upper side of the mounting hole 211, and its bottom abuts against the bottom of the mounting hole 211. A chamfer can be provided on the upper side of the mounting hole 211 to facilitate the insertion and reception of the outer needle tube 22 for glue injection.

[0059] Step S2: Keep the inner needle seat 11 and the outer needle seat 21, and the outer needle tube 22 and the mounting hole 211 connected in place. Connecting in place means that they are assembled together in the state of use, with the bottom of the outer needle tube 22 abutting against the bottom of the mounting hole 211.

[0060] Adjust the up and down position of the ejector pin 52 that abuts against the lower end of the inner core needle 12 so that the extension distance of the needle tip of the inner core needle 12 out of the outer needle tube 22 can be adjusted, and check whether the extension distance reaches the preset distance. For example, for puncture needles with high precision requirements, the extension distance reaches the preset distance of 1.5mm ± 0.05.

[0061] Step S3: When the extension distance reaches the preset distance, inject adhesive into the connection position between the mounting hole 211 and the outer needle tube 22 using the dispensing nozzle 9, and allow it to cure. UV adhesive can be used, which cures quickly under ultraviolet light.

[0062] Step S4: Move the outer needle seat 21 and the outer needle tube 22 upwards to separate the outer needle seat 21 from the inner needle seat 11, exposing the upper side of the first inner through hole 111 and the connection position with the inner core needle 12 for glue injection. The outer needle tube 22 remains sleeved on the outside of the inner core needle 12.

[0063] Step S5: Use the glue injection nozzle 9 to inject glue into the connection position between the upper side of the first inner through hole 111 and the inner core needle 12, and let it cure.

[0064] An adhesive bonding device for which the above-mentioned adhesive bonding method can be applied includes a base 3, a distance detection device 4, and a first adjustment device 5.

[0065] The base 3 is provided with a positioning groove 31 for placing and positioning the inner needle seat 11, and the lower side of the positioning groove 31 is provided with an adjustment hole 32 that runs vertically through it.

[0066] The distance detection device 4 is located above the base 3. The distance detection device 4 is used to detect the extension distance of the needle tip of the inner core needle 12 to the outer needle tube 22.

[0067] The first adjustment device 5 is located on the lower side of the base 3. The first adjustment device 5 is provided with a pin 52. The pin 52 passes through the adjustment hole 32. The first adjustment device 5 can adjust the vertical position of the pin 52 relative to the base 3. The pin 52 can pass through the first inner through hole 111 in the inner needle seat 11 and abut against the bottom of the inner core needle 12 inserted in the first inner through hole 111.

[0068] The inner needle seat 11 is placed in the positioning groove 31 of the base 3. The inner needle seat 11, inner core needle 12, outer needle seat 21, and outer needle tube 22 are assembled together according to their usage state. The ejector pin 52 enters the inner needle seat 11 from the bottom and abuts against the bottom of the inner core needle 12. The upper and lower positions of the ejector pin 52 can be adjusted by the first adjustment device 5. The position of the inner core needle 12 changes with the position of the ejector pin 52, thereby controlling the distance of the needle tip of the inner core needle 12 extending out of the outer needle tube 22. The distance of the needle tip of the inner core needle 12 extending out of the outer needle tube 22 is detected by the distance detection device 4. During the adjustment process, the relative position of the inner core needle 12 and the outer needle tube 22 can be controlled in real time. After the position of the inner core needle 12 is adjusted, the outer needle seat 21 and the outer needle tube 22 are glued and fixed and then removed. Then the inner needle seat 11 and the inner core needle 12 are glued and fixed, thereby completing the bonding and assembly of the puncture needle.

[0069] The bonding of the puncture needle in this invention involves inserting the inner core needle 12 into the outer needle tube 22 and connecting them according to the usage state. The extension distance of the inner core needle 12 from the outer needle tube 22 is controlled by adjusting the up and down position of the top pin 52. After detecting the preset extension distance, the outer needle seat 21 and the outer needle tube 22, and the inner core needle 12 and the inner needle seat 11 are bonded together. This can accommodate deviations in the size or installation of various components. The assembled puncture needle has a more accurate needle tip extension distance, which can improve the assembly accuracy of each puncture needle. Moreover, during bonding, the inner core needle 12 is inside the outer needle tube 22, and the inner core needle 12 and the outer needle tube 22 are basically parallel, which can improve the smoothness during use, thereby improving the quality of the puncture needle.

[0070] In some specific embodiments, step S41 is further included between steps S4 and S5: pressing the inner core needle 12 downward so that the lower end of the inner core needle 12 abuts against the ejector pin 52.

[0071] In step S4, since the outer needle tube 22 and the inner core needle 12 are closely fitted, when the outer needle tube 22 is moved upward, the outer needle tube 22 may move the inner core needle 12 upward as well, causing the inner core needle 12 to deviate from the already adjusted position. The tip of the inner core needle 12 is blocked by the upward-moving outer needle tube 22, and the position of the inner core needle 12 can no longer be detected. If the glue is injected in step S5 at this time, the assembly accuracy may be reduced.

[0072] Therefore, by performing step S41, pressing the inner core pin 12 downwards until it abuts against the ejector pin 52, the position of the inner core pin 12 returns to the adjusted position. Then, performing step S5 (glue injection) ensures that the position of the inner core pin 12 is the adjusted position, improving assembly accuracy. Before or after pressing the inner core pin 12 downwards until it abuts against the ejector pin 52, the inner pin seat 11 can also be pressed downwards into the positioning groove 31, returning the inner pin seat 11 to its original position to prevent it from being moved as well.

[0073] In some specific embodiments, step S6 is included after step S5: remove the inner needle seat 11 and the inner core needle 12, inject glue into the connection position between the lower side of the first inner through hole 111 and the inner core needle 12, and cure it.

[0074] After the upper side of the inner needle seat 11 is bonded and cured at the connection position with the inner core needle 12, the inner needle seat 11 and the inner core needle 12 are removed. The lower side of the inner needle seat 11 is then bonded and cured at the connection position with the inner core needle 12, while sealing the lower side of the first inner through hole 111. Bonding and fixing from both the upper and lower sides can improve the firmness of the connection between the inner core needle 12 and the inner needle seat 11, so as to prevent the inner core needle 12 from loosening during transportation or shifting backward under force during needle puncture due to insufficient bonding.

[0075] In some specific embodiments, the bonding device further includes a calibration seat 6, which is located above the base 3. The calibration seat 6 is provided with a first calibration groove 61, which is used to position the outer needle tube 22 and the inner core needle 12 at the middle in the length direction. The first calibration groove 61 is directly opposite the positioning groove 31 located on the lower side.

[0076] During assembly, the middle of the inner core needle 12 and the outer needle tube 22 can be placed in the first correction groove 61 of the correction seat 6. The first correction groove 61 is directly opposite the positioning groove 31, so that the inner core needle 12 and the outer needle tube 22 are kept vertical as a whole, so as to avoid tilting with the outer needle seat 21 and the inner needle seat 11. Moreover, by matching the positions of the first correction groove 61 and the positioning groove 31, the inner core needle 12 is centered in the first inner through hole 111 of the inner core seat, and the outer needle tube 22 is centered in the mounting hole 211 of the outer needle seat 21, which further improves the assembly and fitting accuracy, so that the inner core needle 12 and the outer needle tube 22 remain basically centered and parallel after rotating at different angles, further improving the smoothness of use.

[0077] Furthermore, a magnet 62 is provided on the calibration seat 6. The magnet 62 is located on the back side of the opening direction of the first calibration groove 61. The magnet 62 is used to attract the outer needle tube 22 and the inner core needle 12 into the first calibration groove 61.

[0078] The magnet 62 on the calibration seat 6 generates a magnetic force on the outer needle tube 22 and the inner core needle 12, attracting them to remain within the first calibration groove 61. This facilitates the positioning of the outer needle tube 22 and the inner core needle 12, resulting in a simple structure. Furthermore, the magnet 62 is positioned on the back side of the opening of the first calibration groove 61, without obstructing its opening. No additional limiting structure is needed at the opening of the first calibration groove 61, which is open, allowing for easy insertion of the outer needle tube 22 and the inner core needle 12. When the outer needle seat 21 and the outer needle tube 22 are removed in step S4, the magnet 62 also retains its attraction to the outer needle tube 22, ensuring the vertical position of the outer needle tube 22 and the inner core needle 12 and preventing them from tilting during removal.

[0079] Furthermore, the first calibration groove 61 is a V-shaped groove with an opening that opens outwards, making it convenient to insert the outer needle tube 22 and the inner core needle 12. During the movement of the outer needle tube 22 and the inner core needle 12, they can be automatically guided to the bottom of the V-shaped groove for positioning, making the operation more convenient.

[0080] In some specific embodiments, the bonding device further includes a prompting device 41, which is electrically connected to the distance detection device 4. The prompting device 41 is used to issue a prompt message when the distance detection device 4 detects that the extension distance of the inner core needle 12 beyond the outer needle tube 22 is within a preset distance. When the extension distance of the inner core needle 12 beyond the outer needle tube 22 is detected to be within the preset distance, the prompting device 41 issues a prompt message to facilitate the operator's understanding of the adjustment status. The prompt message can be displayed using light, sound, or text.

[0081] In some specific embodiments, the bonding device further includes an upper seat 7, which is disposed above the base 3. A distance detection device 4 is disposed on the upper seat 7. The upper seat 7 is provided with a tube end indicator 71, which is used to align the top end face of the outer needle tube 22. The bonding device further includes a second adjustment device 82, which is connected to the upper seat 7 and can adjust the vertical position of the upper seat 7 relative to the base 3.

[0082] During installation and assembly, the position of the outer needle tube 22 can be indicated by comparing the position of the tube end indicator 71 with the upper end of the outer needle tube 22. The upper seat 7 can be adjusted vertically by the second adjustment device 82 so that the tube end indicator 71 faces the upper end of the outer needle tube 22. At the same time, the distance detection device 4 also moves with the upper seat 7, keeping the height distance between the distance detection device 4 and the tube end indicator 71 constant, thereby improving the accuracy of detecting the needle tip position of the inner core needle 12 and improving the detection accuracy of the extension distance. The distance detection device 4 can be a photoelectric sensor. The photoelectric sensor detects the needle tip position of the inner core needle 12. When the needle tip moves from bottom to top, the photoelectric sensor generates a signal change when it blocks the detection light, indicating that the inner core needle 12 has moved and extended into place. At this time, the distance from the detection light emitted by the photoelectric sensor to the tube end indicator 71 is a preset distance. The indicator device 41 can be an indicator light on the photoelectric sensor. When the signal changes, the color of the indicator light changes. In some other embodiments, the distance detection device 4 can also be a camera, etc.

[0083] Furthermore, the tube end indicator 71 is an indicator plane, which can be compared with the end face of the outer needle tube 22 to see if the indicator plane is flush, making it easier to check.

[0084] Furthermore, the upper seat 7 is provided with a second calibration groove 72, which is directly opposite the first calibration groove 61 and the positioning groove 31. The second calibration groove 72 can position the upper part of the outer needle tube 22 and the inner needle tube so that the outer needle tube 22 and the inner needle tube are placed vertically.

[0085] In some specific embodiments, a connecting rod 8 extending upward is fixed on the base 3, and the upper seat 7 is sleeved on the connecting rod 8 and can slide along the connecting rod 8. The connecting rod 8 is provided with a threaded section 811, and an adjusting nut 83 is threadedly connected to the threaded section 811. The upper seat 7 abuts against the upper side of the adjusting nut 83.

[0086] Since the upper seat 7 abuts against the adjusting nut 83, when the adjusting nut 83 is rotated, the adjusting nut 83 can drive the upper seat 7 to move up and down, thereby adjusting the up and down position of the upper seat 7. The structure is relatively simple and easy to adjust.

[0087] Furthermore, a threaded sleeve 81 is fixed on the connecting rod 8, and a threaded section 811 is set on the threaded sleeve 81. The adjusting nut 83 is threadedly connected to the threaded sleeve 81. By setting the threaded sleeve 81, it is not necessary to machine the threaded section 811 on the connecting rod 8. The upper seat 7 is better slidably engaged with the connecting rod 8 on the upper side of the threaded section 811.

[0088] In some specific embodiments, the first adjusting device 5 includes a first bolt 51, an adjusting screw hole 33 is provided on the lower side of the adjusting hole 32, the screw of the first bolt 51 is threadedly connected to the adjusting screw hole 33, and the ejector pin 52 is fixed to the upper end of the screw of the first bolt 51. Rotating the first bolt 51 can adjust the vertical position of the ejector pin 52, facilitating adjustment. When the ejector pin 52 is compressed, the self-locking property of the threaded connection prevents its position from changing, facilitating the adjustment and locking of the ejector pin 52 position. The first bolt 51 can be manually adjusted or electrically driven. In other embodiments, the first adjusting device 5 can also employ other lifting and lowering mechanisms.

[0089] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for bonding a puncture needle, characterized in that, Includes the following steps: S1: Placement of the puncture needle, wherein: The puncture needle includes an inner needle seat (11), an inner core needle (12), an outer needle seat (21), and an outer needle tube (22). The inner needle seat (11) is placed in a positioning groove (31). The lower end of the inner core needle (12) passes through the first inner through hole (111) of the inner needle seat (11). The outer needle seat (21) is located on the upper side of the inner needle seat (11). The outer needle tube (22) is sleeved on the outside of the inner core needle (12). The lower end of the outer needle tube (22) passes through the mounting hole (211) of the outer needle seat (21). The lower side of the mounting hole (211) is provided with a second inner through hole (212). The inner core needle (12) passes through the second inner through hole (212). S2: Keep the inner needle seat (11) and the outer needle seat (21), and the outer needle tube (22) and the mounting hole (211) connected in place. Adjust the up and down position of the top pin (52) that abuts against the lower end of the inner core needle (12) so that the extension distance of the needle tip of the inner core needle (12) extending out of the outer needle tube (22) can be adjusted, and detect whether the extension distance reaches the preset distance. S3: When the extension distance is detected to reach the preset distance, glue is injected into the connection position between the mounting hole (211) and the outer needle tube (22) and cured; S4: Move the outer needle seat (21) and the outer needle tube (22) upward to separate the outer needle seat (21) from the inner needle seat (11), exposing the connection position between the upper side of the first inner through hole (111) and the inner core needle (12), while the outer needle tube (22) remains sleeved on the outside of the inner core needle (12). S5: Inject glue into the connection position between the upper side of the first inner through hole (111) and the inner core needle (12), and cure it.

2. The method for bonding puncture needles as described in claim 1, characterized in that, Between steps S4 and S5, there is also step S41: pressing the inner core needle (12) downward so that the lower end of the inner core needle (12) abuts against the top needle (52).

3. The method for bonding puncture needles as described in claim 1, characterized in that, After step S5, step S6 is also included: take out the inner needle seat (11) and the inner core needle (12), inject glue into the connection position between the lower side of the first inner through hole (111) and the inner core needle (12), and cure it.

4. An adhesive bonding device, characterized in that, include: The base (3) is provided with a positioning groove (31) for placing and positioning the inner needle seat (11), and the lower side of the positioning groove (31) is provided with an adjustment hole (32) that runs through the upper and lower parts. A distance detection device (4) is disposed above the base (3). The distance detection device (4) is used to detect the extension distance of the tip of the inner core needle (12) extending out of the outer needle tube (22). A first adjusting device (5) is provided on the lower side of the base (3). The first adjusting device (5) is provided with a pin (52). The pin (52) passes through the adjusting hole (32). The first adjusting device (5) can adjust the vertical position of the pin (52) relative to the base (3). The pin (52) can pass through the first inner through hole (111) in the inner needle seat (11) and abut against the bottom of the inner core needle (12) inserted in the first inner through hole (111).

5. The bonding device as described in claim 4, characterized in that, The bonding device further includes a calibration seat (6), which is located above the base (3). The calibration seat (6) is provided with a first calibration groove (61), which is used to position the outer needle tube (22) and the inner core needle (12) in the middle of the length direction. The first calibration groove (61) is directly opposite to the positioning groove (31) located on the lower side.

6. The bonding device as described in claim 5, characterized in that, The calibration seat (6) is provided with a magnet (62), which is located on the back side of the opening direction of the first calibration groove (61). The magnet (62) is used to attract the outer needle tube (22) and the inner core needle (12) into the first calibration groove (61).

7. The bonding device as described in claim 4, characterized in that, The bonding device also includes a prompting device (41), which is electrically connected to the distance detection device (4). The prompting device (41) is used to issue a prompting message when the distance detection device (4) detects that the extension distance of the tip of the inner core needle (12) extending out of the outer needle tube (22) is within a preset distance.

8. The bonding device as described in claim 4, characterized in that, The bonding device further includes an upper seat (7), which is located above the base (3). The distance detection device (4) is located on the upper seat (7). The upper seat (7) is provided with a tube end indicator (71), which is used to align the top end face of the outer needle tube (22). The bonding device further includes a second adjustment device (82), which is connected to the upper seat (7). The second adjustment device (82) can adjust the vertical position of the upper seat (7) relative to the base (3).

9. The bonding device as described in claim 8, characterized in that, The base (3) is fixed with an upwardly extending connecting rod (8), the upper seat (7) is sleeved on the connecting rod (8) and can slide along the connecting rod (8), the connecting rod (8) is provided with a threaded section (811), the threaded section (811) is threaded with an adjusting nut (83), and the upper seat (7) abuts against the upper side of the adjusting nut (83).

10. The bonding device as claimed in claim 4, characterized in that, The first adjusting device (5) includes a first bolt (51), and an adjusting screw hole (33) is provided on the lower side of the adjusting hole (32). The screw of the first bolt (51) is threadedly connected to the adjusting screw hole (33), and the pin (52) is fixed to the upper end of the screw of the first bolt (51).

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