Assembly method and assembly equipment for assembling medical needles and plug bodies

Abstract

The present invention relates to an assembly method and assembly equipment for assembling a needle tube and a plug body of a medical needle instrument. The assembly method comprises the following steps: using a puncture member to penetrate a first end of the plug body and puncture a second end of the plug body to form a through-slit on the plug body; adjusting the angle and / or position of the puncture member relative to the needle tube so that the end of the puncture member points toward the end of the needle tube; and transferring the plug body from the puncture member to the needle tube so that the plug body is sheathed on the needle tube through the through-slit. The assembly equipment comprises a guide puncture mechanism, an alignment mechanism, and a transfer mechanism; the guide puncture mechanism is capable of connecting the plug body and the puncture member and driving the puncture member to penetrate from the first end of the plug body to puncture the second end of the plug body; the alignment mechanism is capable of connecting the puncture member and the needle tube and driving the puncture member and the needle tube to move relative to each other so that the end of the puncture member points toward the end of the needle tube; the transfer mechanism is capable of connecting the plug body and the puncture member and / or the needle tube and driving the plug body to transfer from the puncture member to the needle tube so that it is sheathed to a preset sheathing position of the needle tube.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device production, and in particular to an assembling method and equipment for assembling a medical needle and a plug body. Background Art

[0002] Medical needles, such as indwelling needles, include a step of putting a rubber plug on a needle tube during their production process. The current method is to directly use the needle tube to puncture the rubber plug and put the rubber plug on the needle tube.

[0003] Although this assembly method is time-saving, since the needle tube is a hollow structure, the debris of the stopper after puncturing the stopper can easily clog the channel of the needle tube. In addition, the debris itself is adhesive and is difficult to remove once it adheres to the inner wall of the needle tube. This will contaminate the needle and cannot meet the relevant requirements in the medical and health field. Summary of the Invention

[0004] In view of this, the present invention provides a method for assembling a needle tube and a plug body of a medical needle, characterized in that the assembly method comprises the following steps:

[0005] S10, using the piercing member to pierce the plug body to form a through seam on the plug body;

[0006] S20, inserting the guide member into the through-slit from the first end of the plug body, and making the inserted end of the guide member reach at least the second end of the plug body;

[0007] S30, adjusting the angle and / or position of the guide member relative to the needle tube so that the end of the guide member points to the end of the needle tube;

[0008] S40, transferring the plug from the guide member to the needle tube so that the plug is sheathed over the needle tube through the through seam.

[0009] The assembly method provided by the present invention has the following technical effects:

[0010] 1) The plug body is pre-pierced with a piercing member, forming a through-slit in the plug body. A guide member is then inserted into the through-slit, and the needle is then inserted through the through-slit. Compared to existing solutions that directly pierce the plug body with a needle, this invention reduces the resistance of the plug body to the needle, improves the reliability and safety of the assembly process, and eliminates the risk of bending or breaking the plug body due to direct needle puncture.

[0011] 2) The assembly method provided by the present invention does not generate plug body debris that could clog the internal passage of the needle tube. Because the plug body is inserted into the needle tube through a through-slit pre-punctured by the puncture member, when the plug body is transferred from the guide member to the preset insertion position of the needle tube, only the outer peripheral wall of the needle tube and the inner surface of the through-slit slide in contact. The needle tube does not cause new puncture damage to the plug body, and there is no problem of debris adhering to the inner wall of the needle tube.

[0012] In one embodiment, after the step of inserting the guide member into the through-slit from the first end of the plug body and making the inserted end of the guide member reach at least into the second end of the plug body, the following steps are further included:

[0013] The plug body is provided with a guide piece through the through seam;

[0014] The step of transferring the plug from the guide member to the needle tube so that the plug is sheathed in the needle tube through the through seam comprises the following steps:

[0015] The plug body is driven to slide with the outer peripheral wall of the guide member through the through-slit, so that the plug body slides to the end of the needle tube relatively close to the guide member;

[0016] The plug body is continuously driven to slide and cooperate with the outer peripheral wall of the needle tube through the through seam, so that the plug body slides to the preset sleeve position.

[0017] With this arrangement, after the guide piece pierces the plug body, the plug body remains on the guide piece, so the plug body can be directly driven away from the guide piece without removing the plug body, and at the same time the plug body is driven to be covered with the needle tube, which not only shortens the time for covering the plug body, but also better prevents the needle tube from piercing and damaging the plug body.

[0018] In one embodiment, the step of sleeve-mounting the guide member through the through-slit of the plug includes:

[0019] Either end of the guide member is not lower than the surface of the first end of the plug body or the surface of the second end of the plug body.

[0020] Such a setting can ensure that one end of the guide member can abut against the end of the needle tube, preventing the end of the guide member from being unable to abut against the needle tube because it does not extend out of the plug body. The abutment of the end of the guide member against the needle tube can further eliminate the possibility of the needle tube piercing and damaging the plug body.

[0021] In one embodiment, the outer diameter of the guide member is greater than or equal to the outer diameter of the needle tube.

[0022] With this arrangement, the inner diameter of the through-slit will not increase during the transfer of the plug from the guide to the needle tube, thereby preventing the increase in resistance to the sliding fit between the plug and the needle tube, and facilitating the rapid transfer of the plug to the preset insertion position.

[0023] In one embodiment, the step of adjusting the angle and / or position of the guide member relative to the needle tube so that the end of the guide member points toward the end of the needle tube includes the following steps:

[0024] At least one of the guide member and the needle tube is adjusted so that the guide member and the needle tube are coaxially arranged.

[0025] With such arrangement, the plug body can be smoothly sleeved onto the needle tube without changing the movement trajectory and movement direction, and the resistance of the plug body from sleeved onto the needle tube to completely separated from the guide member can be reduced.

[0026] In one embodiment, the step of adjusting at least one of the guide member and the needle tube so that the guide member and the needle tube are coaxially arranged further includes the following steps:

[0027] At least one of the guide member and the needle tube is driven to translate along the axis of the needle tube, so that the guide member and the needle tube are close to each other, and the distance between the guide member and the needle tube is limited to a range smaller than the distance between the first end and the second end.

[0028] With this arrangement, the plug body is partially sleeved on the outer periphery of the needle tube before it completely separates from the guide member, thereby preventing the plug body from falling when being transferred to the needle tube, causing the sleeve operation to be interrupted.

[0029] In one embodiment, the step of adjusting at least one of the guide member and the needle tube so that the guide member and the needle tube are coaxially arranged further includes the following steps:

[0030] The guide member and the needle tube are driven to rotate relative to the other until the guide member and the needle tube are coaxial.

[0031] In one embodiment, the step of adjusting the angle and / or position of the guide member relative to the needle tube so that the end of the guide member points toward the end of the needle tube includes the following steps:

[0032] At least one of the guide member and the needle tube is adjusted so that one end of the guide member abuts against the end of the needle tube.

[0033] With such arrangement, when the plug is transferred, the part of the plug that first separates from the guide piece can be simultaneously put onto the needle tube, that is, the process of the plug separating from the guide piece and the process of the plug being put onto the needle tube start at the same time, and when the plug is completely separated from the guide piece, it also means that the plug is completely put onto the needle tube, and the entire process will not cause the needle tube to penetrate and damage the plug.

[0034] The present invention also provides an assembly device for sleeveing a plug onto a needle tube of a medical needle, characterized in that the assembly device includes a guide puncture mechanism, an alignment mechanism and a transfer mechanism; the guide puncture mechanism can be connected and drive the plug to penetrate the through-slit of the plug from the first end of the plug, so that the puncture end of the guide reaches the second end of the plug; the alignment mechanism can be connected to the guide and / or the needle tube, and is used to drive the guide and the needle tube to move relative to each other, so that the end of the guide member points to the end of the needle tube; the transfer mechanism can be connected to the plug, and is used to drive the plug to transfer from the guide member to the needle tube, so as to be sleeved to the preset sleeve position of the needle tube.

[0035] In one embodiment, the guide member puncture mechanism includes: a puncture positioning unit for fixing and connecting one of the plug body and the guide member; and

[0036] The puncture action unit includes a driving part for fixing and connecting the plug body and the other of the guide members, and the driving part can move relatively close to the puncture positioning unit along a preset puncture track.

[0037] With such arrangement, the guide member can puncture the plug body along a straight track under the drive of the driving part, which can reduce the resistance when the guide member punctures the plug body.

[0038] In one embodiment, the alignment mechanism includes: a first carrier for carrying the needle tube and capable of driving the needle tube to move to the alignment position; and

[0039] The second carrier is used to carry the puncture action unit, which can be connected to the guide member through the puncture action unit and drive the guide member to move horizontally toward the alignment position so that the guide member points to one end of the needle tube after puncturing the plug body;

[0040] When the needle tube is located at the alignment position, the axis of the needle tube coincides with the axis of the guide member, and the preset puncture trajectory is the axis of the guide member.

[0041] With such arrangement, the guide piece punctures the plug body and also achieves the effect that the end of the guide piece points to the end of the needle tube, that is, the puncture step and the alignment step are performed simultaneously, which shortens the time consumption of plug body installation.

[0042] In one embodiment, the puncture action unit further includes a puncture drive source connected to the drive portion, and the puncture drive source can output a reciprocating linear displacement to the drive portion to drive the guide member to axially reciprocate;

[0043] The puncture positioning unit includes a holding component, which can form a holding through hole for fixing and clamping the outer peripheral wall of the plug body. The driving part connects the guide member to make the axis of the guide member pass through the holding through hole.

[0044] Such an arrangement can ensure that the guide member can pierce the plug body without deviation.

[0045] In one embodiment, the puncture positioning unit further includes an axial stop portion, which can move to the outside of one of the two openings of the holding through hole that is relatively far away from the driving portion, and is used to stop the plug body from moving axially by supporting the end face of the plug body away from the driving portion.

[0046] With such arrangement, the axial stop portion provides an axial limiting effect on the plug body, preventing the plug body from moving axially under the force of the guide member, thereby ensuring the normal and smooth completion of the step of the guide member penetrating the through-slit.

[0047] In one embodiment, the transfer mechanism includes a transfer drive source, a feed drive source and a transfer element; the feed drive source is used to drive the transfer element to reach or exit the end of the plug body away from the needle; the transfer drive source is used to drive the transfer element to move relatively close to the needle along a preset puncture trajectory when the transfer element is against the end of the plug body away from the needle.

[0048] With this arrangement, when the feed drive source drives the transfer element to abut against the end of the plug away from the needle, the transfer drive source can synchronously drive the feed drive source and the transfer element to translate along the needle axis, thereby immediately transferring the plug.

[0049] In one embodiment, the alignment mechanism also includes an alignment action unit and a guide tube column, the guide tube column is connected to the power output end of the alignment action unit and is provided with a guide channel for the guide member to extend into; the alignment action unit can make the guide tube column relatively away from one end of the puncture action unit and point to the end face of the plug body.

[0050] In one embodiment, the transfer mechanism includes a clamping assembly, the clamping assembly can form a clamping through hole for coaxially fixing and clamping the needle tube, and the clamping assembly can be moved to a position where the clamping through hole is coaxial with the guide channel;

[0051] The transfer mechanism also includes a transfer action unit driven by the guide tube column. The transfer action unit abuts against the plug body through one end of the guide tube column that is relatively far away from the puncture action unit, and can drive the guide tube column to move axially along the clamping through hole to push the plug body to be sleeved onto the needle tube.

[0052] With such an arrangement, after the clamping assembly fixes and clamps the plug body, the axis of the clamping through hole can first be made to coincide with the axis of the plug body. After completing the alignment step of the guide member and the needle tube, the transfer action unit can directly drive the guide column to apply a thrust to the end face of the plug body. Therefore, the guide column serves as an actuator in the plug body transfer step, and the force of the guide column acting on the plug body acts along the axial direction of the clamping through hole. In this way, the movement direction of the plug body is the same as the thrust direction received by the plug body, and the installation of the needle tube is more labor-saving and quick.

[0053] In one embodiment, the holding assembly is located between the clamping assembly and the piercing action unit.

[0054] In one embodiment, the assembly equipment also includes a loading clamping assembly, which has a loading clamping through hole for coaxially fixing the needle tube and can move to a preset loading position; at the preset loading position, the loading clamping through hole can be coaxially arranged with the clamping through hole.

[0055] With this arrangement, after the needle tube is loaded, the loading clamping assembly and the clamping assembly can jointly fix and clamp the needle tube, and the needle tube is not easy to shake.

[0056] In one embodiment, the preset puncture trajectory extends in a horizontal direction, and the axis of the needle tube and the axis of the guide member are both parallel to the horizontal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a structural schematic diagram of an assembly device in one embodiment of the present invention;

[0058] Figure 2 for Figure 1 A schematic structural diagram of the equipment shown is shown from another perspective.

[0059] Description of reference numerals:

[0060] 100. Assembly equipment; 11. Puncture positioning unit; 111. Holding assembly; 112. Axial stop portion; 113. Axial stop action unit; 12. Puncture action unit; 21. First carrier; 22. Second carrier; 24. Guide column; 25. Alignment action unit; 31. Clamping assembly; 32. Transfer action unit; 41. Feeding clamping assembly; 200. Needle tube; 300. Plug body. DETAILED DESCRIPTION

[0061] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0063] The present invention provides an assembly method for sleeve-mounting a plug body 300 onto a preset sleeve position of a needle tube 200 of a medical needle tool, the assembly method comprising the following steps:

[0064] S10, using the puncture member to pierce the plug body 300 to form a through seam on the plug body 300;

[0065] S20, inserting the guide member into the through-slit from the first end of the plug body 300, and making the inserted end of the guide member reach at least the second end of the plug body 300;

[0066] S30, adjusting the angle and / or position of the guide member relative to the needle tube 200 so that the end of the guide member points to the end of the needle tube 200;

[0067] S40, transferring the plug body 300 from the guide member to the needle tube 200, so that the plug body 300 is sleeved on the needle tube 200 through the through seam;

[0068] The above four steps can be referred to as: puncture member puncture step, guide member puncture step, alignment step, and transfer step. To achieve alignment between the guide member and the needle tube, the puncture end of the guide member must at least reach the second end surface of the plug body 300, and may also protrude beyond the second end of the plug body 300. However, the puncture action of the guide member cannot be stopped before the puncture end reaches the second end.

[0069] The end of the guide member points toward the end of the needle tube 200, meaning that, assuming a reference plane containing the end surface of the needle tube 200, the orthographic projection of the end of the guide member on the reference plane lies exactly within the end surface of the needle tube 200. It should be noted that the requirement that the end of the guide member points toward the end of the needle tube 200 does not necessarily mean that the end of the guide member must contact the end of the needle tube 200; a gap may exist between the two ends.

[0070] Optionally, in one embodiment of the present invention, the guide member is a guide needle, the axis of the guide member (i.e., the center line of the guide needle) intersects with the axis of the needle tube 200, and the intersection of the two is located at or approximately at the geometric center of the end face of the needle tube 200.

[0071] For step S40, the plug body 300 can be made to slide relative to the guide member along the axis of the guide member through the through-slit by applying external force to the plug body 300, or to the guide member or the needle tube 200. During this process, the length of the through-slit in contact with the outer periphery of the guide member gradually decreases, while the length of the through-slit in sliding contact with the outer periphery of the needle tube 200 gradually increases. Finally, the plug body 300 is completely separated from the guide member and is completely sleeved on the needle tube 200.

[0072] In addition, the present invention does not impose any special restrictions on the structure of the plug body 300 after being punctured by the guide member. The through-slit on the plug body 300 can be open, that is, the two ends of the plug body 300 are connected, or it can be closed, that is, the two ends of the plug body 300 are not connected, depending on the outer diameter of the guide member and the material properties of the plug body 300 itself.

[0073] It should be noted that the present invention does not specifically limit the specific type of medical needle. As long as the medical needle needs to be completely covered by the plug body 300 on the needle tube 200, the above-mentioned assembly method can be used for assembly. In addition, the present invention does not specifically limit the end faces of the plug body 300 specifically referred to by the first end and the second end of the plug body 300, but is only for distinguishing the two opposite ends of the plug body 300.

[0074] The assembly method provided by the present invention has at least the following technical effects:

[0075] 1) The plug body 300 is pre-pierced with a puncture member to form a through-slit in the plug body 300. The guide member is then inserted into the through-slit, and the needle tube 200 is then inserted through the through-slit. Compared to existing solutions that directly pierce the plug body 300 with the needle tube 200, the present invention reduces the resistance of the plug body 300 to the needle tube 200 during insertion, while also improving the reliability and safety of the insertion process and eliminating the risk of bending or breaking the plug body 300 due to direct insertion of the needle tube 200.

[0076] 2) The assembly method provided by the present invention prevents the generation of debris from the plug body 300 that could clog the internal passage of the needle tube 200. Because the plug body 300 is pre-installed on the needle tube 200 through a through-slit formed by puncturing the puncture member, when the plug body 300 is transferred from the guide member to the preset insertion position of the needle tube 200, only sliding contact occurs between the outer peripheral wall of the needle tube 200 and the inner surface of the through-slit. The needle tube 200 does not cause any further damage to the plug body 300, and there is no problem of debris from the plug body 300 adhering to the inner wall of the needle tube 200.

[0077] In one embodiment, in step S20, the guide member is inserted into the through-slit from the first end of the plug body 300, and the inserted end of the guide member reaches at least the second end of the plug body 300, further comprising the following steps:

[0078] S201 , the plug body 300 is sleeved on the guide member through the through seam.

[0079] Step S201 indicates that after the guide member pierces the plug body 300, the plug body 300 is kept in the state of being sheathed with the guide member without separating the guide member from the plug body 300.

[0080] In step S40, the plug body 300 is transferred from the guide member to the needle tube 200 so that the plug body 300 is inserted into the needle tube 200 through the through seam, and the following steps are also included:

[0081] S41, driving the plug body 300 to slide with the outer peripheral wall of the guide member through the through slit, so that the plug body 300 slides to the end of the needle tube 200 relatively close to the guide member;

[0082] S42 , continue to drive the plug body 300 to slide with the outer peripheral wall of the needle tube 200 through the through-slit, so that the plug body 300 slides to the preset sleeve position on the needle tube 200 .

[0083] With such arrangement, after the guide piece pierces the plug body 300, the plug body 300 remains on the guide piece, and thus the plug body 300 can be directly driven away from the guide piece without removing the plug body 300, and at the same time the plug body 300 can be driven to be fitted with the needle tube 200, which not only shortens the time spent in fitting the plug body 300, but also better eliminates the situation where the needle tube 200 pierces and damages the plug body 300.

[0084] In one embodiment, in the step of sleeve-mounting the plug body 300 through the through seam onto the guide member, the following steps are further included:

[0085] Either end of the guide member is not lower than the surface of the first end of the plug body 300, nor is it lower than the surface of the second end of the plug body 300. That is, not only is the length dimension of the guide member greater than the axial length dimension of the plug body 300, but each end thereof must at least reach the first end surface or the second end surface of the plug body 300, and cannot be buried in the plug body 300.

[0086] Such a setting can ensure that one end of the guide member can abut against the end of the needle tube 200, preventing the guide member from being unable to abut against the needle tube 200 due to one end not extending out of the plug body 300. Only when the end of the guide member abuts against the needle tube 200 can it be fully ensured that the needle tube 200 will not pierce and damage the end face of the plug body 300, thereby preventing the generation of debris during the subsequent transfer of the plug body 300.

[0087] In one embodiment, the outer diameter of the guide member is greater than or equal to the outer diameter of the needle tube 200. Preferably, the outer diameter of the guide member is greater than the outer diameter of the needle tube 200.

[0088] With this arrangement, when the plug body 300 is transferred from the guide member to the needle tube 200, the inner diameter of the through-slit will not increase, thereby preventing the resistance of the sliding fit between the plug body 300 and the needle tube 200 from increasing, which is conducive to quickly transferring the plug body 300 to the preset installation position.

[0089] In one embodiment, step S30, i.e., adjusting the angle and / or position of the guide member relative to the needle tube 200 so that the end of the guide member points toward the end of the needle tube 200, includes the following steps:

[0090] S31. Adjust at least one of the guide member and the needle tube 200 so that the guide member and the needle tube 200 are coaxially arranged.

[0091] With such arrangement, the movement trajectory of the plug body 300 when transferring from the guide member to the preset sleeve position on the needle tube 200 is always a straight line trajectory, so it can be smoothly sleeved onto the needle tube 200 without changing the movement direction. During the transfer, the plug body 300 is only subjected to the sliding friction of the guide member or the surface of the needle tube 200, which can further reduce the resistance of the plug body 300 from the beginning of sleeved on the needle tube 200 to complete separation from the guide member.

[0092] In addition, the transfer trajectory of the plug body 300 is a straight line, which makes it easier to set up a power source. The power source here refers to the actuator acting on the plug body 300, the needle tube 200 or the guide member during the transfer step. Regardless of whether the plug body 300 is on the guide member or the needle tube 200, the force direction of the actuator is the same.

[0093] Furthermore, in step S31, i.e., adjusting at least one of the guide member and the needle tube 200 so that the guide member and the needle tube 200 are coaxially arranged, the following steps are further included:

[0094] S311. Drive at least one of the guide member and the needle tube 200 to translate along the axis of the needle tube 200, so that the guide member and the needle tube 200 approach each other, and limit the distance between the guide member and the needle tube 200 to a range smaller than the distance between the first end of the plug body 300 and the second end of the plug body 300.

[0095] In this embodiment, the distance between the guide member and the needle tube 200 refers to the distance between the end of the guide member relatively close to the needle tube 200 and the end of the needle tube 200 relatively close to the guide member. This distance is smaller than the axial length of the plug body 300, thereby ensuring that the plug body 300 is partially sheathed around the outer periphery of the needle tube 200 before it is completely separated from the guide member, thereby preventing the plug body 300 from falling off the needle tube 200 and causing the sheathing operation to be interrupted.

[0096] Furthermore, in step S31, i.e., adjusting at least one of the guide member and the needle tube 200 so that the guide member and the needle tube 200 are coaxially arranged, the following steps are further included:

[0097] S312: Drive the guide member and the needle tube 200 to rotate relative to the other until the guide member is coaxial with the needle tube 200. After the rotation is completed, the distance between the needle tube 200 and the guide member is smaller than the distance between the first end of the plug body 300 and the second end of the plug body 300.

[0098] Step S311 and step S312 respectively provide two ways of adjusting the relative position / angle relationship between the guide member and the needle tube 200. Regardless of whether the two are in relative translational motion or relative rotation, as long as at the end of the movement, the orthographic projection of the end of the guide member relatively close to the needle tube 200 in the reference plane containing the end face of the needle tube 200 relatively close to the guide member can be located within the end face of the guide member relatively close to the needle tube 200, it will be sufficient.

[0099] Of course, in some other embodiments, the purpose of making the end of the guide member point to the end of the needle tube 200 can be achieved by driving the relative composite movement between the guide member and the needle tube 200, and is not limited to the above embodiments.

[0100] In one embodiment, step S30, i.e., adjusting the angle and / or position of the guide member relative to the needle tube 200 so that the end of the guide member points toward the end of the needle tube 200, includes the following steps:

[0101] S32. Adjust at least one of the guide member and the needle tube 200 so that one end of the guide member abuts against the end of the needle tube 200.

[0102] One end of the guide member abuts against the end of the needle tube 200 in any of the following situations:

[0103] 1) The insertion end of the guide member extends into the needle tube 200, and the annular end surface on the end of the needle tube 200 abuts against the side wall of the insertion end of the guide member. The insertion end of the guide member can be shaped as a conical surface or a pyramidal surface to reduce the resistance of the guide member to the through-slit;

[0104] 2) The insertion end of the guide member does not extend into the needle tube 200, nor does it actually contact the end face of the needle tube 200, but the insertion end is exactly located within a reference plane containing the end face of the needle tube 200. Alternatively, the insertion end is located on a side of the reference plane relatively close to the end face of the needle tube 200, and the orthographic projection of the insertion end within the reference plane is exactly within the region of the end face of the needle tube 200, where the end face of the needle tube 200 is the end face of the needle tube 200 relatively close to the guide member;

[0105] 3) The piercing end of the guide member does not extend into the needle tube 200, but the piercing end is in actual contact with the end face of the needle tube 200, wherein the end face of the needle tube 200 is the end face of the needle tube 200 relatively close to the guide member.

[0106] The above situations all meet the above definition of making the end of the guide member point to the end of the needle tube 200.

[0107] This embodiment does not specifically limit the position of the guide member end that abuts the end of the needle tube 200 on the guide member. The end of the needle tube 200 can be abutted by the piercing end of the guide member that first penetrates the plug body 300, or by the other end of the guide member that is relatively far away from its piercing end.

[0108] The present invention also provides an assembly device 100 for sleeve-mounting a plug body 300 onto a needle tube 200 of a medical needle instrument. The device includes a guide puncture mechanism, an alignment mechanism, and a transfer mechanism. The three mechanisms are used to perform the above-mentioned guide puncture step, alignment step, and transfer step, respectively.

[0109] In some embodiments, the assembly device 100 further includes a puncture member puncture mechanism (not shown) for performing the puncture member puncture step, wherein the puncture member puncture mechanism is used to connect the puncture member and at least one of the plug body 200, and drive the puncture member needle tip and one end surface of the plug body 200 to move closer to each other until the puncture member needle tip punctures the other end surface of the plug body 200 to form a through seam.

[0110] Specifically, the puncture member puncture step in this embodiment and the subsequent guide member puncture step, alignment step, and transfer step are not performed at the same station. Because the puncture force required to form a through-slit in the plug body 200 is high and the puncture member requires a large space for movement, arranging the puncture member puncture step and subsequent steps at different stations can minimize adverse effects on the positioning of the plug body 200 or the needle cannula 200.

[0111] See also Figures 1 to 2 , Figure 1 is a schematic structural diagram of an assembly device 100 in one embodiment of the present invention; Figure 2 for Figure 1 A schematic structural diagram of the equipment shown is shown from another perspective.

[0112] Among them, the guide puncture mechanism can connect the guide and drive the guide from the first end of the plug body 300 to penetrate the through-slit of the plug body 200, and make the puncture end of the guide reach or extend out of the second end of the plug body 300; the alignment mechanism can connect at least one of the guide and the needle tube 200, and is used to drive the guide and the needle tube 200 to move relative to each other, so that the end of the guide points to the end of the needle tube 200; the transfer mechanism can be connected to the plug body 300, and is used to drive the plug body 300 to transfer from the guide to the needle tube 200, so as to be sleeved to the preset sleeve position of the needle tube 200.

[0113] In one embodiment, the guide puncture mechanism includes a puncture positioning unit 11 and a puncture action unit 12. The puncture positioning unit 11 is used to fix the connecting plug body 300 and one of the guide members. The puncture action unit 12 includes a driving unit for fixing the connecting plug body 300 and the other of the guide members. The driving unit can perform translational movement along a preset puncture trajectory relatively close to the puncture positioning unit 11. The guide follows the driving unit and synchronously moves along the preset puncture trajectory relatively close to the plug body 300 and enters the through-slit until its puncture end reaches or exposes the plug body 300 again.

[0114] Specifically, the alignment mechanism includes a first carrier 21 for carrying the needle tube 200 and driving the needle tube 200 to the aligned position, and a second carrier 22 for carrying the puncture action unit 12. The second carrier 22 can be connected to the guide member through the puncture action unit 12, and the puncture action unit 12 drives the guide member to translate along its own axis toward the aligned position.

[0115] After the guide member penetrates the through seam, one end thereof can abut against one end of the needle tube 200. The end of the guide member for abutting the needle tube 200 can be the tip that first penetrates the through seam, or the other end that is arranged opposite to the tip.

[0116] The aforementioned alignment position refers to the position of the needle cannula 200 relative to the second carrier 22 when the axis of the needle cannula 200 and the axis of the guide member coincide. This alignment position is not a fixed position. In other words, the present invention does not impose any specific restrictions on the initial distance between the needle cannula 200 and the guide member, that is, the distance between the end of the guide member closest to the needle cannula 200 and the end of the needle cannula 200 closest to the guide member before the guide member abuts the needle cannula 200.

[0117] The preset puncture track is the axis of the guide member. In this way, the resistance of the guide member when puncturing the plug body 300 is smaller, and the width of the through seam is also smaller, which is more conducive to subsequent fixing of the sleeve to the needle tube 200.

[0118] Optionally, the puncture and positioning unit 11 includes a holding assembly 111, which includes a first clamping jaw and a second clamping jaw that are movable relative to each other. The first clamping jaw and the second clamping jaw can move relative to each other and together enclose a holding hole for holding the outer wall of the plug body 300. After the holding assembly 111 securely holds the plug body 300, the plug body 300 and the holding hole are coaxial.

[0119] Optionally, the puncture unit 12 includes a puncture cylinder, which includes a first drive guide rod for securely connecting to the guide member. The first drive guide rod is the aforementioned drive unit. The first drive guide rod is connected to the guide member so that the axis of the guide member passes through the holding hole. Preferably, after the guide member is connected to the first drive guide rod, the guide member and the holding hole are coaxially arranged, and thus the guide member and the plug body 300 are coaxially arranged.

[0120] Optionally, the puncture positioning unit 11 further includes an axial stop action unit 113 and an axial stop portion 112 fixedly connected to the power output end of the axial stop action unit 113. The axial stop portion 112 can reciprocate on a track inclined relative to the axis of the holding through hole.

[0121] In this embodiment, the axial stop action unit 113 outputs a reciprocating linear displacement perpendicular to the axis of the holding through hole to the axial stop portion.

[0122] When the assembly apparatus 100 performs the guide puncture step, the axial stopper 113 drives the axial stopper 112 to the outside of one of the two openings of the holding hole, relatively away from the first drive guide rod. This position abuts the end face of the plug 300 facing away from the first drive guide rod, thereby preventing axial movement of the plug 300. After the guide puncture and alignment steps are completed, the axial stopper 113 drives the axial stopper 112 to move in the opposite direction and away from the holding assembly 111, allowing for the subsequent transfer step.

[0123] Thus, the axial stop portion 112 completes a set of feeding and giving way actions, and by repeating this set of actions multiple times, it can continuously provide axial stop limits for different plug bodies 300.

[0124] Furthermore, the alignment mechanism includes an alignment unit 25 and a guide column 24, which is connected to the power output end of the alignment unit 25. The guide column 24 is a hollow structure, with an axially extending guide channel defined within it for the guide member to extend into. The guide column 24 is connected to the alignment unit 25 so that it is coaxial with the holding hole. In this position, driven by the alignment unit 25, the end of the guide column 24 farther from the puncture unit 12 points toward the end face of the plug body 300 closer to the puncture unit 12.

[0125] Optionally, the aligning action unit 25 includes an aligning action cylinder.

[0126] With such arrangement, when the guide member extends from the guide tube column 24 to the end portion of the plug body 300, the guide member immediately penetrates into the plug body 300, which can prevent the guide member from penetrating the plug body 300 after being suspended outside the guide tube column 24. The fact that the guide member is suspended outside the guide tube column 24 means that this part of the guide member is no longer constrained by the inner wall of the guide channel, and there is a risk of it breaking due to the reverse force of the plug body 300.

[0127] Preferably, when the puncture drive cylinder drives the guide member to move, the inner wall of the guide channel and the outer peripheral wall of the guide member slide together. Under the constraint of the inner wall of the guide channel, the guide member can pierce the plug body 300 strictly according to the preset puncture trajectory.

[0128] Furthermore, the transfer mechanism also includes a clamping assembly 31 installed on the first carrier 21. The clamping assembly 31 includes a third clamping jaw and a fourth clamping jaw that can move relatively close to each other and jointly form a clamping through hole. The clamping assembly 31 fixes the outer wall of the needle tube 200 through the clamping through hole, and the clamped needle tube 200 is coaxially arranged with the clamping through hole.

[0129] The clamping assembly 31 can move synchronously with the needle tube 200 to a position where the clamping through hole and the guide through hole are coaxial, so that the needle tube 200 and the guide member are coaxially arranged.

[0130] The transfer mechanism also includes a transfer action unit 32 that is drivably connected to the guide column 24. After the guide member puncture and alignment steps are completed, and with the end of the guide column 24 relatively away from the puncture action unit 12 abutting the end surface of the plug body 300, the transfer action unit 32 drives the guide column 24 to translate axially away from the puncture action unit 12 along the clamping through hole, so that the guide column 24 is positioned within the needle cannula 200. During this process, the axial depth of the guide column 24 within the needle cannula 200 increases, while the axial depth of the guide column 24 within the guide cannula 200 decreases. The end of the guide column 24 abutting the plug body 300 pushes the plug body 300 along the needle cannula 200 until the plug body 300 rests at a predetermined position within the needle cannula 200.

[0131] Optionally, the transfer action unit 32 includes a transfer driving cylinder.

[0132] It should also be noted that, in some other embodiments, one of the alignment action cylinder and the transfer drive cylinder may be omitted. In other words, the alignment action unit 25 and the transfer action unit 32 may be integrated into one drive cylinder.

[0133] Please refer again Figure 1 , Figure 1Reference numeral 300b represents the plug body 300 fixedly clamped on the holding assembly 111. At this time, the end of the plug body 300 relatively close to the puncture action unit 12 abuts against the end of the guide tube column 24. Reference numeral 300a represents the plug body 300 that has been sleeved to the preset sleeve position of the needle tube 200. At this time, the plug body 300 just abuts against the clamping assembly 31.

[0134] Further, if Figure 1 As shown in FIG, the holding assembly 111 is located between the clamping assembly 31 and the puncture action unit 12. When the guide member puncture step is started, the needle tube 200, the plug body 300, and the guide member are coaxially arranged in sequence. After the guide member puncture step and the alignment step are completed, the guide column 24 moves relative to the guide member in a direction close to the needle tube 200 ( Figure 1 The middle finger points to the left direction), and then the axial depth of the guide column 24 sleeved on the needle tube 200 gradually increases until the guide column 24 pushes the plug body 300 to abut against the clamping assembly 31.

[0135] After the transfer step is completed, the puncture action unit 12 drives the guide member to move relatively away from the needle tube 200 along the guide member axis ( Figure 1 The transfer unit 32 drives the guide column 24 to translate relatively away from the needle tube 200 along the axis of the guide member, waiting for the next set of plug bodies 300 and needle tube 200 to be loaded.

[0136] Furthermore, the assembly apparatus 100 includes a loading clamping assembly 41. The loading clamping assembly 41 has a loading clamping through-hole for coaxially securing the needle tube 200 and is capable of synchronously moving the needle tube 200 to a predetermined loading position. At the predetermined loading position, the loading clamping through-hole is coaxial with the clamping through-hole. This means that after the needle tube 200 is loaded, the loading clamping assembly 41 and the clamping assembly 31 can jointly clamp and secure the needle tube 200, preventing the needle tube 200 from shaking.

[0137] Optionally, the preset puncture trajectory extends horizontally. During the complete assembly of the plug body 300, the puncture action unit 12 drives the guide member to move horizontally, the alignment action unit 25 drives the guide column 24 to move horizontally, and the transfer action unit 32 drives the guide column 24 to move horizontally. The guide member puncture, alignment, and transfer steps are all performed horizontally, making it easier for on-site personnel to observe the assembly process in real time and capture the details of each action.

[0138] Of course, in some other embodiments, the preset puncture trajectory may not be parallel to the horizontal direction. For example, in order to reduce the floor space of the assembly device 100, the puncture, alignment and transfer actions may also be performed in the vertical direction.

[0139] It should be noted that the above-mentioned puncture drive cylinder, alignment action cylinder and transfer drive cylinder are only a preferred solution. In other embodiments, the puncture action unit 12, alignment action unit 25 and transfer action unit 32 can also use other types of drive components.

[0140] It should be noted that the above-mentioned guide column 24 is not a necessary structure for achieving the purpose of the present invention. In some other embodiments, a push block can be used instead of the guide column 24. The push block applies force to the plug body 300 to drive it to be transferred to the needle tube 200. The push block does not need to be covered with a guide member or the needle tube 200 during the process of pushing the plug body 300.

[0141] The following are other embodiments or equivalent modifications not shown in the figures.

[0142] In other embodiments, the transfer mechanism includes a transfer drive source, a feed drive source, and a transfer element. The feed drive source can output a reciprocating displacement for driving the transfer element to or from the end of the plug body 300 facing away from the needle 200. Here, the transfer element reaching the end of the plug body 300 facing away from the needle 200 means that the orthographic projection of the transfer element in the plane where the end of the plug body 300 facing away from the needle 200 is located overlaps with the end face of the plug body 300 facing away from the needle 200. Therefore, the transfer element withdrawing from the end of the plug body 300 facing away from the needle 200 means that the orthographic projection of the transfer element in the plane where the end of the plug body 300 facing away from the needle 200 is located does not overlap with the end face of the plug body 300 facing away from the needle 200. When the feed drive source drives the transfer element to abut against the end of the plug body 300 facing away from the needle 200, the transfer drive source can drive the transfer element to move relatively close to the needle 200 along a preset puncture trajectory.

[0143] Specifically, the transfer element and the transfer drive source and the feed drive source can be installed in two ways. Either the transfer element is connected to the power output end of the transfer drive source, and the transfer drive source is connected to the power output end of the feed drive source; or the transfer element is connected to the power output end of the feed drive source, and the feed drive source is connected to the power output end of the transfer drive source.

[0144] Optionally, the transfer element in the above embodiment can be driven by the same feed drive source as the above axial stop portion 112, that is, the aforementioned axial stop unit 113 and the feed drive source in the above embodiment are the same drive component, and when the two are driven by the same feed drive source, the transfer element and the axial stop portion 112 are relatively stationary, and the two can reach the two ends of the plug body 300 respectively, and then, driven by the transfer drive source, the transfer element and the axial stop portion 112 move synchronously along the preset puncture trajectory.

[0145] Once the plug 300 and the needle 200 are in place, a needle 200-guide-plug 300 arrangement can also be used. The corresponding puncture and transfer process for this arrangement is as follows: the plug 300 is inserted into the guide from one end, slides axially along the guide, and then detaches from the guide from the other end and inserts itself onto the needle 200.

[0146] In other embodiments, the alignment step can also be accomplished by driving the guide member to rotate relative to the needle tube 200. The guide member first pierces the plug body 300 with its tip, and then drives the guide member and the plug body 300 to rotate synchronously relative to the needle tube 200 so that the guide member tip is aligned with the end of the needle tube 200, and then the transfer step is performed.

[0147] Specifically, when executing the guide member puncture step, the guide member can be driven to actively puncture the plug body 300, or the guide member can be driven to be sleeved on the plug body 300; when executing the transfer step, the needle tube 200 and the guide member can be fixed at the same time, and an external force can be applied to the plug body 300 to make the plug body 300 slide relative to the whole formed by the needle tube 200 and the guide member, or the plug body 300 can be fixed and the needle tube 200 and the guide member can be driven to slide synchronously relative to the plug body 300.

[0148] Furthermore, when the plug body 300 is first driven to be sleeved on the guide member and then driven to be sleeved on the needle tube 200, the plug body 300 can be inserted from one end of the guide member and then detached from the other end of the guide member and sleeved on the needle tube 200, or the plug body 300 can be inserted from the tip of the guide member and then detached from the guide member from the same tip and sleeved on the needle tube 200.

[0149] In addition, the present invention does not impose any special restrictions on the order of completion of the guide member puncture step and the alignment step. The above two steps can be performed simultaneously, the guide member puncture step can be completed before the alignment step, or the alignment step can be completed before the guide member puncture step.

[0150] When performing the assembly operation, the needle tube 200 can be controlled to be fixed and stationary relative to the ground, driving the guide member and the plug body 300 to move relative to the needle tube 200, or the plug body 300 can be controlled to be fixed and stationary relative to the ground, driving the needle tube 200 and the guide member to move relative to the plug body 300, or the guide member can be controlled to be fixed and stationary relative to the ground, driving the plug body 300 and / or the needle tube 200 to move relative to the guide member.

[0151] The various technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0152] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. Any appropriate changes and modifications to the above embodiments fall within the scope of the present invention as long as they are within the spirit of the present invention.

Claims

1. A method for assembling a needle tube (200) and a plug body (300) for assembling a medical needle, characterized in that: The assembly method comprises the following steps: piercing the plug body (300) with a piercing member to form a through seam on the plug body (300); Inserting the guide member into the through-slit from the first end of the plug body (300), and making the inserted end of the guide member reach at least the second end of the plug body (300); Adjusting the angle and / or position of the guide member relative to the needle tube (200) so that the end of the guide member points to the end of the needle tube (200); The plug body (300) is transferred from the guide member to the needle tube (200) so that the plug body (300) is sleeved on the needle tube (200) through the through seam.

2. The assembly method according to claim 1, characterized in that: The step of inserting the guide member into the through-slit from the first end of the plug body (300) and making the inserted end of the guide member at least reach the second end of the plug body (300) further includes the following steps: The plug body (300) is sleeved with the guide member through the through seam; The step of transferring the plug body (300) from the guide member to the needle tube (200) so that the plug body (300) is sheathed in the needle tube (200) through the through seam comprises the following steps: Driving the plug body (300) to slide and cooperate with the outer peripheral wall of the guide member through the through-slit, so that the plug body (300) slides to the end of the needle tube (200) relatively close to the guide member; The plug body (300) is continuously driven to slide and cooperate with the outer peripheral wall of the needle tube (200) through the through-slit, so that the plug body (300) slides to a preset sleeve position.

3. The assembly method according to claim 2, characterized in that: The step of sleeve-mounting the plug body (300) through the through seam and the guide member comprises: Either end of the guide member is not lower than the surface of the first end of the plug body (300) or the surface of the second end of the plug body (300).

4. The assembly method according to claim 1, characterized in that: The outer diameter of the guide member is greater than or equal to the outer diameter of the needle tube (200).

5. The assembly method according to claim 1, wherein: The step of adjusting the angle and / or position of the guide member relative to the needle tube (200) so that the end of the guide member points to the end of the needle tube (200) comprises the following steps: At least one of the guide member and the needle tube (200) is adjusted so that the guide member and the needle tube (200) are coaxially arranged.

6. The assembly method according to claim 5, characterized in that: The step of adjusting at least one of the guide member and the needle tube (200) so that the guide member and the needle tube (200) are coaxially arranged further includes the following steps: Drive at least one of the guide member and the needle tube (200) to move translationally along the axis of the needle tube (200), so that the guide member and the needle tube (200) approach each other, and limit the distance between the guide member and the needle tube (200) to a range smaller than the distance between the first end and the second end.

7. The assembly method according to claim 5, characterized in that: The step of adjusting at least one of the guide member and the needle tube (200) so that the guide member and the needle tube (200) are coaxially arranged further includes the following steps: The guide member and the needle tube (200) are driven to rotate relative to the other until the guide member and the needle tube (200) are coaxial.

8. The assembly method according to claim 1, wherein: The step of adjusting the angle and / or position of the guide member relative to the needle tube (200) so that the end of the guide member points to the end of the needle tube (200) comprises the following steps: At least one of the guide member and the needle tube (200) is adjusted so that one end of the guide member abuts against the end of the needle tube (200).

9. An assembly device for sleeve-mounting a plug body (300) onto a needle tube (200) of a medical needle, characterized in that: The assembly equipment includes a puncture member puncture mechanism, a guide member puncture mechanism, an alignment mechanism and a transfer mechanism; The piercing member piercing mechanism is used to drive the piercing member and the plug body to move closer to each other until the piercing member pierces the plug body and forms a through seam; The guide member piercing mechanism is capable of connecting and driving the guide member to penetrate the through-slit of the plug body from the first end of the plug body (300), so that the piercing end of the guide member at least reaches the second end of the plug body (300); The alignment mechanism can be connected to the guide member and / or the needle tube (200) and is used to drive the guide member and the needle tube (200) to move relative to each other so that the end of the guide member points to the end of the needle tube (200); The transfer mechanism can be connected to the plug body (300) and is used to drive the plug body (300) to transfer from the guide member to the needle tube (200), so that the plug body (300) is sleeved to a preset sleeve position of the needle tube (200).

10. The assembly equipment according to claim 9, characterized in that The guide member puncture mechanism comprises: a puncture positioning unit (11) for fixedly connecting the plug body (300) and one of the guide members; and The puncture action unit (12) includes a driving portion for fixedly connecting the plug body (300) and the other of the guide members, and the driving portion can move relatively close to the puncture positioning unit (11) along a preset puncture trajectory.

11. The assembly equipment according to claim 10, characterized in that The alignment mechanism comprises: A first carrier (21) is used to carry the needle tube (200) and can drive the needle tube (200) to a positioning position; and A second carrier (22) is used to carry the puncture action unit (12), and can be connected to the guide member through the puncture action unit (12) and drive the guide member to move horizontally toward the alignment position, so that the guide member punctures the plug body (300) and points to one end of the needle tube (200); Wherein, when the needle tube (200) is located at the alignment position, the axis of the needle tube (200) coincides with the axis of the guide member, and the preset puncture trajectory is the axis of the guide member.

12. The assembly equipment according to claim 10, characterized in that The puncture action unit (12) further comprises a puncture drive source connected to the drive portion, wherein the puncture drive source is capable of outputting a reciprocating linear displacement to the drive portion to drive the guide member to axially reciprocate; The puncture positioning unit (11) includes a holding assembly (111), and the holding assembly (111) can form a holding through hole for fixing and clamping the outer peripheral wall of the plug body (300). The driving part connects to the guide member so that the axis of the guide member passes through the holding through hole.

13. The assembly equipment according to claim 12, characterized in that The puncture positioning unit (11) further includes an axial stop portion (112), which is capable of moving to the outside of one of the two openings of the holding through hole that is relatively far away from the driving portion, and is used to support the end face of the plug body (300) away from the driving portion to stop the plug body (300) from moving axially.

14. The assembly equipment according to claim 10, characterized in that The transfer mechanism includes a transfer drive source, a feed drive source and a transfer element; The feed drive source is used to drive the transfer element to reach or exit the end of the plug body (300) away from the needle; the transfer drive source is used to drive the transfer element to move relatively close to the needle (200) along the preset puncture trajectory when the transfer element is in a state of abutting the end of the plug body (300) away from the needle (200).

15. The assembly device according to claim 12, characterized in that The alignment mechanism further comprises an alignment action unit (25) and a guide column (24), wherein the guide column (24) is connected to the power output end of the alignment action unit (25) and is provided with a guide channel for the guide member to extend into; The alignment action unit (25) can make the end of the guide tube column (24) relatively away from the puncture action unit (12) point toward the end surface of the plug body (300).

16. The assembly equipment according to claim 15, characterized in that The transfer mechanism comprises a clamping assembly (31), the clamping assembly (31) being capable of forming a clamping through hole for coaxially fixing and clamping the needle tube (200), and the clamping assembly (31) being capable of moving to a position where the clamping through hole is coaxial with the guide channel; The transfer mechanism further comprises a transfer action unit (32) drivingly connected to the guide tube column (24), wherein the transfer action unit (32) abuts against the plug body (300) through an end of the guide tube column (24) relatively away from the puncture action unit (12), and is capable of driving the guide tube column (24) to translate along the axial direction of the clamping through hole, so as to push the plug body (300) to be sleeved onto the needle tube (200).

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