Medical device assembly equipment

Abstract

The present invention relates to a medical device assembly device for assembling an accessory with a side opening onto a rod body, comprising: a guide portion for allowing the accessory to move or be arranged thereon along a preset guide track; a constraint portion extending along the guide track toward the discharge end of the guide portion; a propulsion mechanism for adapting and pushing the accessory separated from the discharge end onto the rod body, wherein the discharge end and the end of the constraint portion are arranged in sequence in the propulsion direction of the propulsion mechanism. The medical device assembly device provided by the present invention reduces the difficulty of assembling the accessory onto the rod body, and the assembly is more labor-saving; the accuracy requirements for positioning the accessory before assembly with the rod body are lower; before pushing the accessory onto the rod body, the guide mechanism arranges the accessory in an orderly manner and pre-adjusts the position of the accessory, so that the side opening of each accessory after blanking is in the same direction, and can then be directly pushed by the propulsion mechanism, thereby saving a lot of adjustment time, and the blanking and pushing of the accessory into place are more compact, which greatly improves the assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device production, and in particular to a medical device assembly device for fitting an accessory with a side opening onto a rod body. Background Art

[0002] A medical syringe consists of a tubular body and a push rod that extends and retracts from the tubular body. In addition to the tubular body, the push rod also includes a fitting located on one end of the tubular body, closer to the liquid outlet. In some medical syringes, the fitting has a lateral opening that connects to the through-hole it fits into. When assembled with the tubular body, this fitting expands and deforms through the lateral opening, increasing the diameter of the through-hole and thereby clamping against the sidewall of the tubular body.

[0003] In actual production, the assembly of these accessories and the rod is difficult, inefficient, and produces low yields. Firstly, due to the reaction force exerted by the rod on the accessories, and the rod itself being a cylindrical structure with a variable cross-section, the accessories encounter resistance when being axially sleeved onto the rod, making assembly laborious. Secondly, the small size of the accessories and the rod makes positioning and clamping them difficult, making it easy for misalignment to lead to assembly failure.

[0004] Furthermore, the accessories are made of lightweight materials and are fed in large quantities. Once loaded, their positions and orientations vary, making it difficult to precisely align them for direct assembly onto the rod. Furthermore, the accessories themselves are easily affected by external interference and can shift position. Consequently, each accessory must be individually adjusted to ensure its position and orientation meet the assembly process requirements. This results in significant time wastage and significantly hinders the production capacity of medical syringes. Summary of the Invention

[0005] In view of this, it is necessary to provide a medical device assembly device for assembling an accessory with a side opening onto a rod body, the medical device assembly device comprising:

[0006] The material guide portion is used for allowing accessories to move along a preset material guide track or be arranged thereon;

[0007] A restraining portion extending along the material guiding track toward a discharge end of the material guiding portion;

[0008] The propulsion mechanism is used to adapt and push the accessories separated from the discharge end to the rod body. In the propulsion direction of the propulsion mechanism, the discharge end and the end of the constraint part are arranged in sequence.

[0009] The medical device assembly device provided by the present invention has at least the following beneficial effects:

[0010] 1) When the accessory is pushed sideways, the rod exerts a reaction force on the accessory, forcing the side opening of the accessory to expand and deform. The deformed accessory is easier to hold on the rod. Therefore, the present invention can reduce the difficulty of assembling the accessory and the rod, saving assembly effort.

[0011] 2) Since the fitting deforms by being forced to expand its side opening, the internal stress in the fitting is compressive stress and bending stress distributed along its circumference. After the fitting is held by the rod, it can quickly return to its pre-deformation state without incurring other deformations, such as torsional deformation. Therefore, the shape and size of the fitting before and after deformation can remain consistent.

[0012] 3) The positioning accuracy requirements before assembly of the accessory and the rod are reduced and easy to achieve. As long as the side opening of the accessory faces the side wall of the rod after blanking, the rod can directly act on the edge of the side opening of the accessory during the process of pushing the accessory to expand it. The assembly method of using the accessory and the rod to be coaxially positioned and then move relative to each other along the axial direction to fit the rod significantly increases the difficulty of positioning the two before assembly;

[0013] 4) Before pushing the accessories into the rod, the guide and restraint components arrange and position the accessories in an orderly manner, ensuring that the side openings and end faces of each blanked accessory are aligned, allowing them to be directly pushed by the pushing mechanism until the edge of the accessory's side opening contacts the side wall of the rod. This reduces the time spent adjusting the position of the accessories, allowing for a tighter timeline between blanking and pushing the accessories into position, significantly improving assembly efficiency.

[0014] 5) Since the accessory is pushed laterally by a propulsion mechanism, the accessory is less sensitive to external interference and propulsion displacement deviation of the propulsion mechanism. On the one hand, the position of the accessory will basically not change during the propulsion period. On the other hand, even if the position of the accessory changes slightly, it will not affect its deformation and clamping.

[0015] In one embodiment, the propulsion mechanism includes a pushing unit having a positioning reference center for limiting the radial freedom of movement of the accessory relative to the propulsion mechanism. The pushing unit can drive the positioning reference center to point to the discharge end to obtain the accessory.

[0016] With this arrangement, the accessory can be correctly adapted to the blanking unit after blanking. Once obtained by the blanking unit, the direction of its side opening will not change with the radial movement of the accessory, which helps to ensure that the side opening of the accessory remains facing the rod body without changing.

[0017] In one embodiment, the propulsion mechanism has an ejection state and a retraction state. The propulsion mechanism occupies the blanking position in the ejection state and exits the blanking position in the retraction state. The blanking position includes a spatial area where the outer side of the discharge end intersects with the motion sweeping space of the propulsion mechanism.

[0018] With this arrangement, the push mechanism, in its pushed-out position, prevents parts still in the guide from continuing to move along the guide track and drop out. When the push mechanism is in its retracted position, it completely withdraws from the dropout position, allowing parts in the guide to continue moving along the guide track. By continuously switching between the pushed-out and retracted positions, intermittent transfer of parts and individual dropouts can be achieved, resulting in a more orderly dropout process.

[0019] In one embodiment, the restraining portion includes a rib formed by following the bending of the material guiding portion, and the rib extends outward at least at its end along the pushing direction of the propulsion mechanism.

[0020] With such a configuration, the ribs can be arranged in the accessory side opening of the material guide portion, and the two sides of the ribs can be used to abut the edges of the accessory side opening. Therefore, the ribs can limit the rotational freedom of the accessory to limit the change in the orientation angle of the accessory side opening. The position of the accessory before blanking is pre-adjusted through the ribs, and the accessory that finally arrives at the discharge end has a side opening facing the rod body.

[0021] In one embodiment, the ribs are flat plates with uniform thickness; and / or the ribs are connected to and protrude from the side walls of the material guiding portion.

[0022] With such an arrangement, the orientation of the side opening of each blanked accessory remains consistent, and the ribs can also play a better role in pre-adjusting the position of smaller accessories before blanking.

[0023] In one embodiment, the medical device assembly apparatus further includes a material stabilizing mechanism, which is disposed outside the restraining portion on a side away from the material guiding portion in the pushing direction of the propulsion mechanism, and is used to abut against the side wall of the rod to limit the movement of the rod.

[0024] With this arrangement, the freedom of movement of the rod is limited by the material stabilizing mechanism. Even if the accessory contacts the side wall of the rod and exerts pressure on it, the rod can still maintain its position and shape stable and will not move relative to the accessory, so that the accessory can quickly hold its surrounding wall.

[0025] In one embodiment, the material stabilizing mechanism includes a first clamping part and a second clamping part that can be closed together to clamp the rod body; the first clamping part and / or the second clamping part are provided with a pushing space for avoiding the propulsion mechanism from moving close to the rod body; or, the first clamping part and / or the second clamping part deviate from the propulsion trajectory of the propulsion mechanism.

[0026] With such an arrangement, the propulsion trajectory of the propulsion mechanism can just pass through the pushing space, or the propulsion mechanism can smoothly avoid the material stabilizing mechanism during the propulsion movement, which is conducive to the propulsion mechanism pushing the accessories to the rod body without hindrance.

[0027] In one embodiment, the medical device assembly apparatus further includes a negative pressure generating unit and has a negative pressure channel connected to the negative pressure generating unit. The negative pressure channel has an air inlet opening opened in the propulsion mechanism and capable of opening toward the rod body.

[0028] With such a configuration, the negative pressure generating unit can exert an adsorption force on the accessory through the negative pressure channel so that the accessory is firmly held on the propulsion mechanism, eliminating the relative freedom of movement between the accessory and the propulsion mechanism. Therefore, strengthening the adsorption effect on the accessory can make the accessory and the propulsion mechanism better combined into a whole, which can significantly improve the success rate of the accessory being correctly installed on the rod body.

[0029] In one embodiment, the medical device assembly apparatus further includes a material receiving mechanism, the material receiving mechanism including:

[0030] The material receiving unit can stay at a preset material receiving position to be arranged opposite to the material discharging end;

[0031] A limit adapter unit connected to the material receiving unit;

[0032] When the material receiving unit is located at the preset material receiving position, the position limiting adapter unit points to the material discharging end and protrudes from a side of the material receiving unit facing the material discharging end.

[0033] With this arrangement, during the process of the accessory dropping from the discharge end to being formally connected to the rod body, the material receiving mechanism can receive the material through the material receiving unit to avoid material loss; it can also constrain the accessory through the limit adapter unit to fine-tune or limit the position of the accessory.

[0034] In one embodiment, the limit adapter unit can move along its own axial direction relative to the material receiving unit to switch to a state where it does not protrude from the side of the material receiving unit toward the discharge end; or, the material receiving unit and the limit adapter unit can move relatively away from the discharge end synchronously along the axial direction of the limit adapter unit.

[0035] With such a configuration, the limit adapter unit can move in its axial direction to disengage from the material through hole, thereby releasing the adaptive connection between the limit adapter unit and the material. The process of disengagement between the two is easy and will not cause damage to the accessories. After the material is detached from the limit adapter unit, it can be pushed forward by the pushing mechanism.

[0036] In one embodiment, the position limiting adapter unit includes:

[0037] A perforated portion, the perforated portion pointing to the discharge end when the receiving unit is located at a preset receiving position;

[0038] The limiting portion is convexly arranged on the outer wall of the perforated portion and is located on the side of the perforated portion away from the propulsion mechanism, and is used to adapt to the side opening edge of the accessory to limit the rotation of the accessory.

[0039] With such a configuration, the perforated portion can penetrate and occupy the through hole of the accessory, and the limiting portion can occupy the side opening of the accessory as the perforated portion enters the through hole of the accessory, and then contact the edges of the side openings respectively. Its adaptation with the edges of the side openings can further ensure that the direction angle of the side opening will not change, and can also correct the deviation of the direction angle of the side opening of the accessory.

[0040] In one embodiment, the medical device assembly device also includes a material stabilizing mechanism. In the propulsion trajectory direction of the propulsion mechanism, the material stabilizing mechanism is located outside the constraint part on the side away from the material guiding part, and the material receiving mechanism can move relatively close to the material stabilizing mechanism and cooperate with the material stabilizing mechanism to clamp the rod body.

[0041] With this arrangement, the material receiving mechanism and the material stabilizing mechanism can work together to fix the rod body to prevent it from deflecting under the squeezing action of the accessories, thereby ensuring that the assembly process of the accessories and the rod body is completed smoothly and quickly, and this can also simplify the mechanism and layout for restricting the rod body.

[0042] In one embodiment, the propulsion mechanism includes a pushing unit that can reciprocate on the outside of the discharge end, the pushing unit includes an adapting groove for adapting to the accessories that are separated from the guide part and a blocking side for blocking the accessories located at the discharge end; or the medical device assembly device also includes a last-position accessory blocking part that can reciprocate to approach and move away from the outer wall of the discharge end.

[0043] With such a configuration, the blocking side part of the pushing unit or the last-position accessory blocking part can temporarily block and position the next accessory that arrives at the discharge end after the previous accessory leaves the discharge end, so that the previous accessory will not have the problem of more accessories falling off from the guide part during the pushing process. In this way, the accessories can be dropped one by one, the dropping is more orderly and chaos is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of the three-dimensional structure of a medical device assembly device in one embodiment of the present invention;

[0045] Figure 2 for Figure 1 A partial enlarged schematic diagram of the medical device assembly device at position X is shown;

[0046] Figure 3 This is a schematic diagram of a portion of the structure of a medical device assembly apparatus in one embodiment of the present invention from a first viewing angle;

[0047] Figure 4 is a partial structural schematic diagram of a medical device assembly apparatus in one embodiment of the present invention at a second viewing angle;

[0048] Figure 5 It is a schematic diagram of the three-dimensional structure of the material receiving mechanism in one embodiment of the present invention.

[0049] Description of reference numerals:

[0050] 100. Medical device assembly device; 300. Rod body;

[0051] 10. Material guiding mechanism; 11. Material guiding portion; 111. Material discharging end; 12. Constraint portion; 121. Rib plate;

[0052] 20. Propelling mechanism; 21. Pushing unit; 22. Propelling drive source;

[0053] 30. Material stabilizing mechanism; 311. Material pushing space; 321. First clamping part; 322. Second clamping part; 33. Carrier;

[0054] 40. Material receiving mechanism; 41. Position limiting adapter unit; 411. Perforating portion; 412. Position limiting portion; 42. Material receiving unit; 421. Supporting surface. DETAILED DESCRIPTION

[0055] The following will be combined with the 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.

[0056] 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.

[0057] The present invention provides a medical device assembly device 100, which is used to assemble a hollow accessory with a side opening onto a rod body 300 to obtain an assembly required for producing a specific medical consumable. In the assembly obtained using this medical device assembly device 100, the accessory is held against the outer wall of the rod body 300 via its through-hole. Due to the diverse types of medical consumables, this invention does not specifically limit this. For ease of description, the following uses the assembly process of a medical syringe plunger as an example to explain in detail the specific structure and operating principle of the medical device assembly device 100.

[0058] The medical syringe plunger can be a common syringe plunger or a prefilled syringe plunger, and includes a rod body 300 that can extend and retract into the syringe, and a hollow retaining spring that is mounted on one end of the rod body 300 relatively close to the syringe's liquid outlet. Generally, this type of hollow retaining spring has a side opening that connects to its through hole to provide a certain degree of deformation capability. By deforming, the side opening expands, thereby increasing the size of its through hole, allowing the retaining spring to be mounted / clamped onto the rod body 300. The task of the medical device assembly device 100 is to mount the retaining springs onto the rod body 300 one by one after they are loaded in bulk. After assembly is complete, the retaining spring returns to its pre-deformation size and shape and continues to clamp onto the outer periphery of the rod body 300, preventing it from detaching from the rod body 300 in its natural state.

[0059] See also Figures 1 to 4 The medical device assembly device 100 includes a material guide mechanism 10 and a propulsion mechanism 20. The former is used to arrange and guide a large number of clips in an orderly manner until they leave the material guide mechanism 10 (for ease of description, the process of clips leaving the material guide mechanism 10 is referred to as clips dropping). The latter is used to retrieve the clips that have been dropped and left the material guide mechanism 10 one by one, then apply a lateral thrust to the clips to push them to the side wall of the rod body 300. The thrust is then continued to force the side wall of the rod body 300 to react against the edge of the clip's side opening. Once the side opening is widened, the clip is quickly placed on the rod body 300. The thrust applied by the propulsion mechanism 20 on the clips is in the same direction as the side opening of the clips, both pointing toward the side wall of the rod body 300.

[0060] The blanking of the retaining springs one by one is accomplished through the coordinated cooperation of the material guide mechanism 10 and the propulsion mechanism 20. After the retaining spring leaves the material guide mechanism 10, the propulsion mechanism 20 immediately adapts to the retaining spring and applies a thrust to the outer wall of the retaining spring that opens to the back side. At the same time, the propulsion mechanism 20 occupies the blanking position of the retaining spring, thereby preventing the remaining retaining springs still in the material guide mechanism 10 from continuing to blank. After the blanking retaining spring is pushed and assembled into the rod body 300, the propulsion mechanism 20 moves back in the direction opposite to the propulsion direction, and then leaves the blanking position. Subsequently, the retaining springs located in the material guide mechanism 10 continue to move to blank. The blanking position allows a single accessory to be placed therein, but cannot allow two or more accessories to be placed therein. Repeating the above process can realize the blanking and push-in assembly of the retaining springs one by one. Therefore, the states in which the propulsion mechanism 20 occupies the blanking position and exits the blanking position can be defined as the push-out state and the retracted state, respectively.

[0061] The material guide mechanism 10 includes a guide portion 11 and a restraining portion 12. The guide portion 11 extends and forms along a predetermined material guide trajectory. A retaining spring through-hole can be sleeved on the outer wall of the guide portion 11, thereby allowing accessories to move or be arranged on the guide portion 11 along the material guide trajectory. The guide portion 11 includes a loading end near the loading mechanism and a discharge end 111 relatively far from the loading mechanism and near the propulsion mechanism 20. The restraining portion 12 also extends along the predetermined material guide trajectory toward the discharge end 111. Preferably, the material guide trajectory is a curve, with the downstream portion of the guide portion 11, including the discharge end 111, pointing toward the ground. Therefore, upon reaching the downstream portion of the guide portion 11, the retaining spring can spontaneously slide toward the discharge end 111 under the action of gravity.

[0062] The propulsion mechanism 20 includes a pusher unit 21 for adapting to a retaining spring exiting the discharge end 111, and a propulsion drive source 22 that drives the pusher unit 21, thereby laterally pushing the retaining spring. The propulsion drive source 22 can output a driving force perpendicular to the direction of the retaining spring's movement when it leaves the discharge end 111, or a driving force with a component perpendicular to the direction of the retaining spring's movement, to the pusher unit 21, thereby extending or retracting the pusher unit 21. The direction of the material drop is the direction of extension of the preset material guide track at the discharge end 111, preferably pointing toward the ground. The aforementioned material drop position includes the intersection of the outer side of the discharge end 111 and the space swept by the pusher unit 21 during its telescopic movement.

[0063] In the pushing direction of the propulsion mechanism 20, that is, the direction in which the pushing unit 21 performs telescopic movement, the discharge end 111 and the end of the constraint portion 12 are arranged in sequence. If it is assumed that the discharge end 111 and the end of the constraint portion 12 continue to extend in the blanking direction, thereby forming a first imaginary extension segment and a second imaginary extension segment, respectively, the pushing unit 21 will first touch the first imaginary extension segment during the extension movement, and then touch the second imaginary extension segment. This arrangement ensures that when the push-clip moves toward the rod body 300, its side opening always faces the rod body 300, preventing the side opening of the clamping spring from deflecting and ultimately causing the side wall of the clamping spring to hit the side wall of the rod body 300. It should be noted that the end of the constraint portion 12 can be flush with the discharge end 111 and terminate at the same time, or it can terminate before the discharge end 111, as long as the end of the constraint portion 12 does not protrude beyond the discharge end 111 in the blanking direction.

[0064] Optionally, the spring restraint portion 12 includes a rib 121 that is formed by extending and bending along a preset material guiding trajectory following the material guiding portion 11. The function of the rib 121 is that when the spring is arranged in the material guiding portion 11, the rib 121 can pass through the side opening of the spring, and the side opening edges of the spring can contact both sides of the rib 121 respectively. From the time the rib 121 enters the side opening of the spring to the time the spring reaches the discharge end 111, the rib 121 always occupies the side opening of the spring. In this way, the rib 121 can limit the freedom of the spring to rotate relative to the material guiding portion 11 in its circumferential direction.

[0065] The ribs 121 extend outwardly at least at their distal ends relatively close to the blanking position, along the direction of propulsion by the propulsion mechanism 20 or the direction of extension of the pusher unit 21. The present invention does not specifically limit the direction of extension of the ribs 121 at other locations other than the distal ends. The purpose of the ribs 121 extending outwardly at their distal ends, along the direction of propulsion by the propulsion mechanism 20, is to ensure that the side opening of the clamping spring faces the rod body 300 during and after blanking.

[0066] Preferably, the ribs 121 are flat plates, the extension directions of the ribs 121 at all positions are the same, and the thicknesses of the ribs 121 are uniform. The ribs 121 are directly connected to the material guide portion 11 and protrude from the side wall of the material guide portion 11 .

[0067] Preferably, the thickness of the rib 121 is smaller than the width of the material guide portion 11, or the cross-sectional dimension of the rib 121 is smaller than the cross-sectional dimension of the material guide portion 11. The so-called cross-sectional dimension is the cross-sectional dimension obtained by intercepting the material guide mechanism 10 using the normal plane of any point on the material guide trajectory. The cross-sectional shape of the material guide portion 11 is preferably circular.

[0068] Furthermore, the medical device assembly device 100 also includes a material stabilizing mechanism 30 for limiting the radial and axial freedom of movement and lateral bending freedom of the rod body 300. The material stabilizing mechanism 30 and the propulsion mechanism 20 are respectively located on both sides of the radial direction of the discharge end 111. In the pushing direction of the propulsion mechanism 20, the material stabilizing mechanism 30 is arranged outside the side of the constraint part 12 away from the material guide part 11. The distance from the pushing unit 21 to the material stabilizing mechanism 30 when it is in the pushed-out state is smaller than the distance from the pushing unit 21 to the material stabilizing mechanism 30 when it is in the retracted state.

[0069] The material stabilizing mechanism 30 can provide auxiliary lateral support for the rod body 300 by abutting against the side wall of the rod body 300, so as to limit the radial movement, axial movement and lateral bending deformation freedom of the rod body 300, and prevent the rod body 300 from moving or bending under the extrusion of the side opening edge of the retaining spring, thereby ensuring smooth assembly of the retaining spring and the rod body 300; in addition, the material stabilizing mechanism 30 can prevent the rod body 300 from shear damage due to excessive extrusion of the retaining spring, and has the function of protecting the rod body 300.

[0070] See again Figure 1 、 Figure 3 、 Figure 4 , see again Figure 1 、 3-4. The material stabilizing mechanism 30 includes a first clamping portion 321 and a second clamping portion 322 that can move toward each other and close to jointly clamp the rod body 300. This can further improve the protection of the rod body 300 and the effect of limiting the movement or deformation of the rod body 300. In order to ensure that the pushing unit 21 can be smoothly driven and propelled by the propulsion drive source 22 and to avoid movement interference between the pushing unit 21 and the material stabilizing mechanism 30, at least one of the first clamping portion 321 and the second clamping portion 322 is provided with a pushing space 311 for preventing the pushing unit 21 from moving close to the rod body 300. Of course, the first clamping portion 321 and the second clamping portion 322 can also be set to deviate from the movement trajectory of the pushing unit 21.

[0071] Furthermore, the pushing unit 21 is provided with an adapting groove for contacting the outer wall of the retaining spring. The shape of the inner wall / bottom wall of the adapting groove is the same as the shape of the outer wall of the retaining spring, both of which are cylindrical. The axis of the adapting groove serves as a positioning reference center for limiting the radial movement of the retaining spring relative to the pushing unit 21 after it is connected to the pushing unit 21. After the retaining spring is adapted to the adapting groove, its axis coincides with the positioning reference center, and at this time the positioning reference center points to the discharge end 111.

[0072] In one embodiment (not shown), the medical device assembly apparatus 100 further includes a stopper configured to contact and block the pusher unit 21. When the pusher unit 21 reaches the endpoint of its propulsion trajectory, it abuts the stopper, at which point the retaining spring also clamps against the outer wall of the rod 300. Thus, the stopper restricts the pusher unit 21 from continuing to move in the propulsion direction, preventing damage to the retaining spring from being squeezed by the sidewall of the rod 300 and the pusher unit 21. It also protects the rod 300 from shear damage caused by lateral compression from the propulsion mechanism 20.

[0073] In one embodiment (not shown), the medical device assembly apparatus 100 further includes a negative pressure generating unit and a negative pressure channel connected thereto. The negative pressure generating channel is oriented toward, or can be adjusted to, an air inlet opening provided in the rod body 300 or the stabilizing mechanism 30. Upon activation of the negative pressure generating unit, as gas is continuously drawn in through the air inlet opening, the negative pressure generating unit exerts an adsorption force on the retaining spring. This adsorption secures the retaining spring within the adapting groove of the pusher unit 21, making it more difficult to separate the retaining spring and the pusher unit 21, thus integrating the two into a single unit. This not only enhances the retaining spring's ability to withstand external interference but also ensures a tight, less easily separated connection between the retaining spring and the pusher unit 21 when the propulsion drive source 22 is outputting power, enabling more efficient assembly of the retaining spring onto the rod body 300. Furthermore, when the retaining spring abuts the rod body 300, it is less likely to be deflected by the reaction force from the sidewalls of the rod body 300. Alternatively, the air inlet opening is directly formed in the pusher unit 21 and extends through the bottom wall of the adapting groove.

[0074] See again Figure 1 、 Figure 4In this embodiment, the medical device assembly apparatus 100 further includes a carrier 33 for carrying the rod body 300. The carrier 33 is provided with a plurality of rod insertion holes for partially extending the rod body 300. Of course, other structures may also be provided on the carrier 33 to carry the rod body 300. The material guide mechanism 10 includes a plurality of material guide portions 11 arranged in a row, and the discharge ends 111 of the plurality of material guide portions 11 are arranged along a direction parallel to the arrangement of the plurality of rod insertion holes; the propulsion mechanism 20 includes a plurality of material pushing units 21 corresponding to the material guide portions 11 one by one. The plurality of material pushing units 21 can be synchronously extended and moved toward the carrier 33 to push the plurality of retaining springs onto the rod body 300. After assembly is completed, the plurality of material pushing units 21 then synchronously move relatively away from the carrier 33 to switch the propulsion mechanism 20 to a retracted state.

[0075] Optionally, in this embodiment, the number of propulsion drive sources 22 is one, and its power output end simultaneously drives and connects multiple pushing units 21; of course, in other embodiments, the number of propulsion drive sources 22 can also be multiple, and they are driven and connected to the pushing units 21 one by one, and each pushing unit 21 can be independently driven and operated by the corresponding propulsion drive source 22.

[0076] Furthermore, the medical device assembly apparatus 100 also includes a material receiving mechanism 40. This mechanism is used to temporarily receive the retaining spring that has escaped from the material guide portion 11 to prevent its loss and to form a temporary adaptive connection with the retaining spring. This provides a final constraint and adjustment of the retaining spring's position and orientation before assembly to the rod body 300, ensuring that the orientation of the retaining spring's side opening remains unchanged during the process of being pushed by the material pushing unit 21. The material receiving mechanism 40 releases its adaptive connection with the retaining spring no later than when the material pushing unit 21 contacts the limit stop or the retaining spring contacts the side wall of the rod body 300.

[0077] The material receiving mechanism 40 includes a material receiving unit 42 for temporarily receiving the retaining spring, and a position limiting adapter unit 41 connected to the material receiving unit 42 for forming an adaptive connection with the retaining spring that has been separated from the discharge end 111. The material receiving unit 42 includes a supporting surface 421 for contacting the end face of the retaining spring to support the retaining spring. When the material receiving unit 42 is located at the preset material receiving position, the supporting surface 421 is arranged opposite to the end face of the discharge end 111, and the discharge end 111 can form a complete positive projection on the supporting surface 421. At this time, the position limiting adapter unit 41 is arranged to protrude relative to the supporting surface 421, and at least a portion of the structure of the position limiting adapter unit 41 can extend into the retaining spring through hole to limit the rotation of the retaining spring around its own axis.

[0078] See Figure 5The position-limiting adapter unit 41 includes a columnar or rod-shaped perforated portion 411, and a position-limiting portion 412 fixed relative to the perforated portion 411. The position-limiting portion 412 protrudes from the side of the perforated portion 411 facing away from the pushing unit 21 toward the material stabilizing mechanism 30 / rod body 300. When the material receiving unit 42 is in the preset material receiving position, the perforated portion 411 and the position-limiting portion 412 both protrude from the supporting surface 421. At this time, the perforated portion 411 points to the discharge end 111 and is coaxial with the end face of the discharge end 111. In addition, the end of the position-limiting portion 412 relatively close to the material guide portion 11 is also arranged opposite to the end of the constraint portion 12. In the pushing direction of the propulsion mechanism 20, the end of the perforated portion 411 relatively close to the material guide portion 11 and the end of the position-limiting portion 412 relatively close to the material guide portion 11 are arranged in sequence. The perforated portion 411 is used to penetrate and occupy the through hole of the retaining spring, and the limiting portion 412 can enter and occupy the side opening of the retaining spring. After the retaining spring leaves the discharge end 111, the perforated portion 411 can be directly sleeved. When the perforated portion 411 is sleeved, the edge of the side opening of the retaining spring and the limiting portion 412 form a conformal adaptation connection in a surface contact manner, thereby limiting the freedom of the retaining spring to rotate around its own axis, and the radial movement freedom is also limited by the perforated portion 411.

[0079] Preferably, the perforated portion 411 and the limiting portion 412 in this embodiment are integrally formed. In addition, the dimensions of the limiting portion 412 in the direction perpendicular to the axis of the perforated portion 411 and in the direction of propulsion by the propulsion mechanism 20 tend to increase in the direction away from the side wall of the perforated portion 411. Specifically, the limiting portion 412 includes two guide surfaces with a V-shaped angle, which are respectively used to abut the two side opening edges of the retaining spring. In the direction away from the perforated portion 411, or in the direction of propulsion by the propulsion mechanism 20, the distance between the two guide surfaces tends to gradually increase. In this way, the limiting adapter unit 41 can better adapt to the V-shaped side opening of the retaining spring.

[0080] It should be noted that after the limiting adapter unit 41 forms an adaptive connection with the clamping spring, the limiting portion 412 may or may not protrude from the outer cylindrical surface of the outer peripheral wall of the clamping spring.

[0081] Furthermore, the position-limiting adapter unit 41 is capable of moving along the axis of the perforated portion 411, thereby withdrawing the perforated portion 411 from the through-hole of the retaining spring and simultaneously withdrawing the position-limiting portion 412 from the side opening of the retaining spring, thereby releasing the adaptive connection between the position-limiting adapter unit 41 and the retaining spring. Specific implementation methods may include: 1) the position-limiting adapter unit 41 moves axially along the perforated portion 411 relative to the material receiving unit 42. When the position-limiting adapter unit 41 moves to a point where it no longer protrudes from the supporting surface 421, the adaptive connection between the position-limiting adapter unit 41 and the retaining spring is released; 2) the position-limiting adapter unit 41 and the material receiving unit 42 are relatively fixed, and the two move together axially along the perforated portion 411 to release the position-limiting adapter unit 41 from the retaining spring.

[0082] Optionally, the receiving mechanism 40 is configured to move synchronously with the advancing movement of the pushing unit 21. After the retaining spring leaves the discharge end 111, it is first captured by the receiving unit 42. The limiting adapter unit 41 then adapts and connects to the retaining spring. The pushing unit 21 then extends and abuts against the outer wall of the retaining spring. The receiving mechanism 40 and the pushing unit 21 then remain relatively fixed and move synchronously toward the stabilizing mechanism 30 / rod body 300. During this process, the retaining spring is secured by the perforated portion 411, the limiting portion 412, and the pushing unit 21. When the retaining spring contacts or is about to contact the side wall of the rod body 300, the limiting adapter unit 41 releases its adaption connection with the retaining spring, and the pushing unit 21 finally pushes the retaining spring into place.

[0083] Optionally, the material receiving mechanism 40 does not need to move along with the advancing movement of the pushing unit 21. After the material receiving unit 42 obtains the retaining spring, and the position limiting adapter unit 41 is adapted and connected to the retaining spring, the pushing unit 21 extends and connects to the outer peripheral wall of the retaining spring, and then the negative pressure generating unit is started to operate, which applies an adsorption force to the retaining spring through the air inlet opening, so that the retaining spring is fixedly adsorbed in the adapting groove of the pushing unit 21. When the retaining spring and the pushing unit 21 are combined into a whole, the position limiting adapter unit 41 detaches from the retaining spring and releases the adapting connection therewith, and then the pushing unit 21 independently pushes the retaining spring to move closer to the stabilizing mechanism 30 / rod body 300. During the advancing movement, the retaining spring and the pushing unit 21 are always kept connected and fixed by the negative pressure adsorption force. The material receiving mechanism 40 is responsible for the final position limitation / correction of the retaining spring leaving the discharge end 111 before assembly.

[0084] Furthermore, in this embodiment, when the material receiving unit 42 is in the preset material receiving position so that the perforated portion 411 and the material discharging end 111 point toward each other, the material pushing unit 21 first pushes the retaining spring toward the material stabilizing mechanism 30 to perform a slight movement so that both ends of the retaining spring's side opening abut against the limiting portion 412. Then, the material pushing unit 21 slightly moves away from the material stabilizing mechanism 30. At this time, the retaining spring is sucked back under the action of negative pressure until the inner wall of the retaining spring contacts the outer wall of the perforated portion 411 on the side facing away from the material pushing unit 21. After this round of operation, the precise adjustment of the retaining spring's side opening angle is completed, and its opening direction accurately points to the rod body 300, thereby completing a slight adjustment of the retaining spring's position. This is also the last position adjustment performed on the retaining spring before it is sleeved on the rod body 300.

[0085] In one embodiment, the material receiving mechanism 40 can move close to the material stabilizing mechanism 30 and thus clamp the rod body 300 together with the material stabilizing mechanism 30. Compared with the aforementioned embodiment, in this embodiment, there is no need to provide the first clamping part 321 and the second clamping part 322 for the material stabilizing mechanism 30, which can move toward each other and close the clamping rod body 300. This reduces the components of the medical device assembly device 100 and simplifies the structure of the medical device assembly device 100. The effect of the material stabilizing mechanism 30 and the material receiving mechanism 40 clamping the rod body 300 together is not inferior to that of the first clamping part 321 and the second clamping part 322 clamping the rod body 300.

[0086] Furthermore, the pushing unit 21 also includes a material blocking side portion. Since the extension limit position and the retraction limit position of the pushing unit 21 are both located outside the discharge end 111, and its range of motion is also located outside the discharge end 111, when the pushing unit 21 pushes the previous clip that has separated from the discharge end 111 away from the blanking position, the pushing unit 21 will occupy the blanking position, and at the same time, its material blocking side portion contacts the end of the next clip that has just arrived at the discharge end 111, thereby providing temporary support and blocking for the remaining clips to prevent other clips from continuing to move along the material guide track. Until the pushing unit 21 completes the advancement of the previous clip and exits the blanking position through retraction, the clip at the end of the discharge end 111 can continue to blank.

[0087] In other embodiments, a final accessory blocking portion may be provided. This portion is substantially flush with the discharge end 111 and is capable of reciprocating, continuously approaching and moving away from the sidewall of the discharge end 111. When the previous retaining spring detaches from the discharge end 111, the final accessory blocking portion rapidly moves toward the sidewall of the discharge end 111 to provide temporary support and blocking for the retaining spring at the end of the discharge end 111. This occurs until the pusher unit 21 completes a single push and retracts from the blanking position. At this point, the final accessory blocking portion moves away from the sidewall of the discharge end 111, allowing the retaining spring at the end of the discharge end 111 to be blanked. Repeating these steps allows the retaining springs to be blanked one by one in an orderly manner, preventing excessive blanking at one time.

[0088] 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.

[0089] 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 medical device assembly device for sleeve-mounting a clip having a side opening onto a rod body (300), characterized in that: The medical device assembly device comprises: A material guide portion (11) is used for allowing the clamping spring to move along a preset material guide track or be arranged thereon, and has a material discharge end (111) pointing to the ground; The restraining portion (12) extends along the material guiding track toward the discharge end (111) of the material guiding portion (11); the restraining portion (12) includes a rib plate (121) formed by following the bending of the material guiding portion (11), and the rib plate (121) extends outward at least at its end along the pushing direction of the propulsion mechanism (20); the rib plate (121) is a flat plate with uniform thickness; and / or the rib plate (121) is connected to and protrudes from the side wall of the material guiding portion (11); The propulsion mechanism (20) includes a pushing unit (21) adapted to disengage the clamping spring from the discharge end (111), and also includes a propulsion driving source (22) drivingly connected to the pushing unit (21) and pushing the clamping spring to the rod body (300), wherein in the propulsion direction of the propulsion mechanism (20), the discharge end (111) and the end of the restraining portion (12) are arranged in sequence; The material receiving mechanism (40) is used to receive and adapt the clip that has separated from the material guide portion (11), thereby finally restraining and correcting the position of the clip before the clip is assembled to the rod body (300). The material receiving mechanism (40) includes a material receiving unit (42) and a position limiting adapting unit (41). The material receiving unit (42) can stay at a preset material receiving position. When the material receiving unit (42) stays at the preset material receiving position, the material receiving unit (42) is arranged opposite to the discharge end (111), the position limiting adapter unit (41) protrudes from the material receiving unit (42) toward the side of the discharge end (111) and points to the discharge end (111), and the position limiting adapter unit (41) at least partially extends into the retaining spring through hole to limit the retaining spring from rotating around its own axis; The position limiting adapter unit (41) includes a relatively fixed perforated portion (411) and a position limiting portion (412), the position limiting portion (412) protrudes from the side of the perforated portion (411) away from the pushing unit (21) toward the rod body (300), and in the pushing direction of the pushing mechanism (20), the end of the perforated portion (411) relatively close to the material guide portion (11) and the end of the position limiting portion (412) relatively close to the material guide portion (11) are arranged in sequence; the material receiving unit (42) includes a supporting surface (421), and the supporting surface (421) is used to contact the end surface of the retaining spring to support the retaining spring; When the material receiving unit (42) is in the preset material receiving position, the supporting surface (421) is arranged opposite to the end surface of the discharge end (111), the perforated portion (411) and the limiting portion (412) both protrude from the supporting surface (421), the perforated portion (411) points toward the discharge end (111), and the limiting portion (412) is arranged relatively close to the end of the guide portion (11) and opposite to the end of the constraint portion (12); At least the position-limiting adapter unit (41) is configured to be movable along the axial direction of the perforated portion (411) so as to allow the perforated portion (411) to exit the retaining spring through hole and simultaneously drive the position-limiting portion (412) to exit the retaining spring side opening, thereby releasing the adaptive connection between the position-limiting adapter unit (41) and the retaining spring; The material receiving mechanism (40) is configured to be relatively fixed with the material pushing unit (21) and to move synchronously with the pushing movement of the material pushing unit (21) to approach the rod body (300); or, The assembly device further includes a negative pressure generating unit and a negative pressure channel connected to the negative pressure generating unit, the negative pressure channel having an air inlet opening, the air inlet opening being opened in the propulsion mechanism (20) and facing the rod body (300), the material receiving mechanism (40) being configured not to follow the movement of the pushing unit (21), the negative pressure generating unit adsorbs the retaining spring through the air inlet opening so that the retaining spring is fixed to the pushing unit (21), the limit adapter unit (41) releases the adapter connection with the retaining spring and detaches from the retaining spring, and the pushing unit (21) independently pushes the retaining spring to move closer to the rod body (300).

2. The medical device assembly device according to claim 1, wherein: The medical device assembly device further includes a material stabilizing mechanism (30). In the pushing direction of the propulsion mechanism (20), the material stabilizing mechanism (30) is arranged outside the side of the constraint portion (12) away from the material guiding portion (11), and is used to abut against the side wall of the rod body (300) to limit the movement of the rod body (300).

3. The medical device assembly device according to claim 2, characterized in that: The material stabilizing mechanism (30) comprises a first material clamping portion (321) and a second material clamping portion (322) which can be folded together to clamp the rod body (300); The first clamping portion (321) and / or the second clamping portion (322) is provided with a pushing space (311) for preventing the propulsion mechanism (20) from moving close to the rod body (300); or, The first material clamping portion (321) and / or the second material clamping portion (322) deviate from the propulsion trajectory of the propulsion mechanism (20).

4. The medical device assembly device according to claim 1, wherein: The medical device assembly device further includes a material stabilizing mechanism (30). In the propulsion trajectory direction of the propulsion mechanism, the material stabilizing mechanism (30) is located outside the side of the constraint portion (12) away from the material guiding portion (11), and the material receiving mechanism (40) can move relatively close to the material stabilizing mechanism (30) and cooperate with the material stabilizing mechanism (30) to clamp the rod body (300).

5. The medical device assembly apparatus according to claim 1, wherein: The pushing unit (21) is capable of reciprocating outside the discharge end (111), and comprises an adapting groove for adapting to a retaining spring that is separated from the guide portion (11) and a material blocking side portion for blocking the retaining spring located at the discharge end (111); or The medical device assembly device further comprises a final position retaining spring blocking portion capable of reciprocating to approach and move away from the outer side wall of the discharge end (111).

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