Accessory reversing mechanism

Abstract

The present invention relates to an accessory reversing mechanism for adjusting and constraining the position of medical consumable accessories. The accessory reversing mechanism includes: an adapter component, which is used to form a fixed fit with the consumable accessory and has a reference position; and an adjustment component, which is connected and can drive at least one of the adapter component and the consumable accessory to move, and is used to make the adapter component reach or maintain the reference position after the adapter component forms a fixed fit with the consumable accessory. The present invention does not particularly limit the position of the accessory after loading. Accessories in any position can form a fixed fit with the adapter component, and then the accessory has the opportunity to reach the reference position. Ultimately, as long as the adapter component reaches its reference position, it means that the accessory has reached the preset position. Therefore, the accessory reversing mechanism can adjust the position of a large number of accessories, and the credibility and consistency of the final adjustment result are very high, and no additional verification is required.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device production, and in particular to an accessory reversing mechanism for adjusting and constraining consumable accessories. Background Art

[0002] In the production of some medical consumables, it is often necessary to pre-adjust or pre-position certain consumable accessories before assembly, so that they reach and maintain a preset position, ensuring that the consumable accessories can be assembled with other consumable accessories after being transferred to the next assembly station, thereby saving a lot of unnecessary adjustment time and shortening the production cycle of the medical consumables. Taking the production process of puncture needles represented by biopsy needles as an example, whether it is an inner needle or an outer needle, the needle holder and the metal needle must reach a certain relative position before the needle can be inserted into the needle holder. In the same batch of biopsy needles after assembly, the orientation angle of the needle blade relative to the needle holder meets the specific angle requirements, and the orientation angles of all needles and their corresponding needle holders are consistent.

[0003] The process of achieving the above goals is called pre-adjustment of the needle-needle seat position. Most of the current biopsy needle hubs are pre-equipped with an adapter, which can be used as a benchmark for judging whether the relative position / angle relationship between the needle hub and the needle meets the assembly requirements specified by industry specifications. For the final biopsy needle product, as long as the relative position and angle relationship between the needle and the needle hub meet the assembly requirements, it will be sufficient. However, in the actual assembly process, more factors need to be considered, such as the relative position / angle relationship between the needle and the assembly equipment, and the relative position / angle relationship between the needle hub and the assembly equipment. In addition, more attention should be paid to the consistency of the position pre-adjustment results of each needle hub in the same batch of biopsy needles before assembly. This creates difficulties in taking into account the relative position / angle relationship between the needle and the needle hub, and realizing the position pre-adjustment of multiple needle hubs has become the key to solving the above problems. Summary of the Invention

[0004] In view of this, it is necessary to provide an accessory reversing mechanism for adjusting and constraining the position of medical consumable accessories. The accessory reversing mechanism includes:

[0005] An adapter component, used to form a fixed fit with the consumable accessory and having a reference position; and

[0006] The adjusting component is connected to and can drive at least one of the adapting component and the consumable accessory to move, and is used to make the adapting component reach or maintain a reference position after the adapting component and the consumable accessory form a fixed fit.

[0007] In one embodiment, the adapter component has a positioning reference center, which is used to limit the radial position of the consumable accessory relative to the adapter component; the adjustment component includes an auxiliary unit, which connects the adapter component and / or the consumable accessory and limits the freedom of the two to move relative to each other along the positioning reference center.

[0008] With such a configuration, when the adapter component is fixedly matched with multiple consumable accessories respectively, the position of each consumable accessory relative to the adapter component is consistent, so that the position adjustment results of the consumable accessories are also consistent; the auxiliary unit can enhance the stability and sufficiency of the adaptation between the adapter component and the consumable accessory, which can avoid the formation of an insufficiently firm adaptation between the two and avoid the separation of the two from each other.

[0009] In one embodiment, the auxiliary unit includes a pressing element for connecting to the consumable accessory and a force-applying element connected to the pressing element and / or the adapter assembly, and the force-applying element is used to make the pressing element contact the consumable accessory.

[0010] With this arrangement, the auxiliary unit can apply a pressing force to the consumable accessories and the adapter assembly to prevent the consumable accessories from popping out of the adapter assembly, thereby improving the tightness of the fixed fit between the two. In some cases, it can also accelerate the formation of a circumferential anti-rotation fit between the consumable accessories and the adapter assembly.

[0011] In one embodiment, the accessory reversing mechanism further includes a detection unit inductively connected to the auxiliary unit or the adjustment component, and the detection unit is configured to generate an induction signal when the adapter component and the consumable accessory form a fixed fit.

[0012] With this arrangement, the generation of an induction signal indicates that the consumable accessory and the adapter assembly have successfully formed a circumferential non-rotational fit. Next, the force exerted by the auxiliary unit on the consumable accessory needs to be removed to prevent damage to the consumable accessory.

[0013] In one embodiment, the auxiliary unit includes a pressing element for connecting to the consumable accessory and capable of moving relatively close to the adapter assembly, and the detection unit is used to detect the distance between the pressing element and the adapter assembly.

[0014] With this arrangement, the consumable accessory and the adapter assembly successfully form a circumferential non-rotating fit, which means that the overlapping size of the adapter parts of the two is further increased. Therefore, the distance between the consumable accessory and the adapter assembly must change, specifically decrease. It is easier to detect the change in the distance between the two, the feasibility of the solution is higher, and the selection and arrangement of the detection unit are also relatively simple.

[0015] In one embodiment, the adapter component includes a linkage unit, which defines a relative position for the consumable accessory to form a circumferential fixed fit with it; the adjustment component includes a reversing unit that is driven and connected to the linkage unit, and the reversing unit is used to drive the linkage unit and the consumable accessory to move synchronously toward a reference position in a fixed fit state, and stop running when the reference position is reached.

[0016] With this arrangement, the accessory is fixedly matched with the linkage unit and can move synchronously with the linkage unit under the accurate control of the reversing unit, so that the position adjustment of the accessory can be traced; the reversing unit can accurately control the displacement of its output to prevent the linkage unit from missing the reference position.

[0017] In one embodiment, the reversing unit is a driving source capable of outputting angular displacement, the linkage unit is connected to the power output end of the reversing unit and can rotate synchronously with the power output end; the linkage unit can cooperate with the consumable accessories to prevent circumferential rotation.

[0018] With this arrangement, the reversing unit changes the accessory's circumferential orientation angle by driving the linkage unit. When the linkage unit and accessory are locked in place, they remain relatively stationary and rotate synchronously. Therefore, the angular displacement output by the reversing unit is the angular displacement of the linkage unit, and therefore also the angular displacement of the accessory. This ensures that the drive source's drive quantity is consistent with the desired adjustment displacement, increasing the reliability of the adjustment result.

[0019] In one embodiment, the adapter assembly includes a circumferential positioning portion, which is used to limit the freedom of circumferential rotation of the consumable accessory and uniquely define the relative position of the consumable accessory and the adapter assembly to form a fixed fit.

[0020] With such an arrangement, the accessory and the adapter assembly have a unique fixed fitting relative position, which determines that as long as the adapter assembly reaches the reference position, the accessory will undoubtedly reach its preset position.

[0021] In one embodiment, the adapter assembly also includes a circumferential mating portion for plugging or socketing consumable accessories, and the circumferential positioning portion includes a positioning boss protruding from the end face or side wall of the circumferential mating portion; and / or, the circumferential positioning portion defines an open groove on the end face of the circumferential mating portion.

[0022] With such arrangement, the adapter assembly can be adapted to an accessory with a unique opening slot via the positioning boss, or can be adapted to an accessory with a unique positioning boss via the opening slot.

[0023] In one embodiment, the adapter component uniquely defines the position for the consumable accessory to form a circumferentially fixed fit therewith; the adjustment component includes a reversing unit for connecting the consumable accessory or the adapter component, and the reversing unit can drive the consumable accessory and the adapter component to rotate relative to each other until the consumable accessory and the adapter component are circumferentially fixed, and stops applying force constraint to the consumable accessory or the adapter component.

[0024] With this arrangement, the position adjustment process of the consumable accessories is simpler, and it is easy to determine when the preset position is reached. As long as the consumable accessories and the adapter component form a circumferential anti-rotation fit, it means that the consumable accessories are adjusted.

[0025] In one embodiment, the reversing unit is used to connect the consumable accessory, and the reversing unit can slide relative to the consumable accessory when the consumable accessory is circumferentially fixed to the adapter assembly.

[0026] In this arrangement, when the consumable accessory reaches its preset position, the reversing unit can stop applying external force constraints to the consumable accessory by sliding relative to the consumable accessory, thereby stopping the consumable accessory from continuing to rotate relative to the adapter component to avoid damage to the consumable accessory.

[0027] In one embodiment, the adjustment component also includes an auxiliary unit connected to the reversing unit, the auxiliary unit can adapt to the consumable accessories, the reversing unit is connected to the consumable accessories through the auxiliary unit, and the auxiliary unit can slide relative to the reversing unit when the consumable accessories are fixed circumferentially in the adaptation component.

[0028] In this arrangement, when the consumable accessory reaches its preset position, the auxiliary unit can cut off the power output from the reversing unit to the consumable accessory by sliding relative to the reversing unit. At this time, the reversing unit stops driving the consumable accessory to rotate relative to the adapter assembly.

[0029] In one embodiment, the adjustment assembly further includes an auxiliary unit connected to the consumable accessory, and the auxiliary unit can slide relative to the consumable accessory when the consumable accessory is circumferentially fixed to the adapter assembly.

[0030] In this arrangement, when the consumable accessory reaches its preset position, the auxiliary unit releases its restraining force on the consumable accessory by sliding relative to the consumable accessory, thereby allowing the consumable accessory and the adapter assembly to remain in the reference position together without being affected by the auxiliary unit.

[0031] In one embodiment, the adjustment component also includes a synchronization unit, the reversing unit drives the connection synchronization unit, and the synchronization unit includes a synchronization transmission part for connecting multiple consumable accessories or multiple adapter components respectively, and the multiple synchronization transmission parts can follow the power output of the reversing unit and move synchronously in the same orientation.

[0032] With this arrangement, the accessory reversing mechanism has the function of adjusting and constraining the positions of multiple consumable accessories at the same time. Each consumable accessory can receive a consistent adjustment displacement, which significantly improves the processing capacity of the accessory reversing mechanism and can be used in situations with higher production capacity.

[0033] In one embodiment, the accessory reversing mechanism also includes a feeding unit and a material moving unit; the feeding unit reciprocates between the loading position and the adapter component to obtain and transfer the consumable accessories to the adapter component; the material moving unit reciprocates between the adapter component and the installation position to obtain and transfer the consumable accessories to the installation position when the adapter component is in the reference position; the feeding unit and the material moving unit can operate synchronously.

[0034] With this arrangement, the feeding unit and the material transfer unit cooperate with each other, which significantly speeds up the transfer of consumable accessories from the loading position to the installation position via the position adjustment station. Compared with the scheme of setting up only one transfer component, which is responsible for both transferring the accessories from the loading position to the adapter assembly and transferring the accessories to the installation position, this embodiment can significantly shorten the accessory processing cycle and improve the production efficiency of medical consumables.

[0035] The accessory reversing mechanism provided by the present invention can adjust the position of the accessories of the rotating body mechanism. The accessory reversing mechanism does not specifically limit the position of the accessories after loading. Accessories in the same batch can arrive at the position adjustment station according to different positions. Accessories in any position can form a fixed fit with the adapter component, and then the accessory has the opportunity to reach the reference position. Since the reference position has been artificially preset for the adapter component, the movement of the accessory is restricted by adapting to the accessory, especially the freedom of its circumferential rotation movement is restricted, so that the accessory and the adapter component are combined into one. Finally, as long as the adapter component reaches its reference position, it means that the accessory has reached the preset position. Therefore, the accessory reversing mechanism can adjust the position of a large number of accessories, and the credibility and consistency of the final adjustment result are very high. No additional verification is required. After the adjustment, the accessory can be directly transferred to the subsequent assembly station and assembled with other accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the three-dimensional structure of an accessory reversing mechanism in one embodiment of the present invention;

[0037] Figure 2 for Figure 1 The partial enlarged schematic diagram of the accessory reversing mechanism at position X is shown;

[0038] Figure 3 is a schematic diagram of the three-dimensional structure of the accessory reversing mechanism in one embodiment of the present invention from another perspective;

[0039] Figure 4 for Figure 3 The shown schematic diagram is a partial enlargement of the accessory reversing mechanism at position Y.

[0040] Description of reference numerals:

[0041] 100, accessory reversing mechanism; 200, needle holder; 300, needle tool; 400, feeding mechanism; 500, needle insertion unit;

[0042] 10. Adapter assembly; 11. Linkage unit; 111. Circumferential matching portion; 112. Circumferential positioning portion; 20. Adjustment assembly; 21. Reversing unit; 30. Auxiliary unit; 31. Pressing element; 40. Material moving unit; 50. Material feeding unit. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] The present invention provides an accessory reversing mechanism 100 for loading and adjusting the position of medical consumable accessories, particularly for medical consumable accessories with a rotating structure, to achieve a specific circumferential orientation angle. After position adjustment, the medical consumable accessory can be directly assembled with other accessories at a subsequent assembly station.

[0046] The structural components and operating principles of the accessory reversing mechanism 100 will be explained in detail using the loading and position adjustment of a puncture needle hub 200, a typical example of a biopsy needle. The base of the biopsy needle 300 is coaxially inserted into the needle hub 200. Unless otherwise specified, the needle hub 200 will be used to refer to the medical consumable accessory, and the needle 300 will be used to refer to the accessory that is assembled with the needle hub 200 at a later stage.

[0047] Pre-positioning means adjusting the circumferential orientation of the needle hub 200 before assembling the needle hub 200 and the needle 300. Existing biopsy needles have a specific adapter for the needle hub 200, which serves as a reference for determining whether the relative position / angle relationship between the needle hub 200 and the needle 300 meets the assembly positioning requirements. Only when the circumferential angular relationship between the adapter of the needle hub 200 and the cutting edge of the needle 300 meets the specific assembly process requirements can the needle hub 200 and the needle 300 be plugged and assembled. This operation is referred to as pre-positioning the needle hub 200.

[0048] The accessory reversing mechanism 100 is introduced below. The accessory reversing mechanism 100 includes an adapter assembly 10 for forming a fixed fit with the needle hub 200 , and an adjustment assembly 20 for connecting and driving at least one of the adapter assembly 10 and the needle hub 200 to move.

[0049] The adapter component 10 has a reference position. The significance of the reference position is that when the needle seat 200 and the adapter component 10 form a fixed fit, at least when the needle seat 200 cannot rotate relative to each other in the circumferential direction, as long as the adapter component 10 reaches or is in the reference position, the needle seat 200 has the opportunity to reach a preset position that meets the positioning requirements of the subsequent workstation assembly. Reaching the preset position indicates that the position adjustment of the needle seat 200 is completed; in addition, the adapter component 10 also has a positioning reference center. The significance of the positioning reference center is that after the needle seat 200 and the adapter component 10 are matched and connected, the position of the needle seat 200 relative to the adapter component 10 in the radial direction is determined, and the needle seat 200 will not move relative to the adapter component 10 along its own radial direction.

[0050] Optionally, the reference position can be the current position of the adapter assembly 10 at a certain moment, or the position reached by the adapter assembly 10 itself after some movement and / or adjustment. The needle hub 200 and the adapter assembly 10 are preferably adapted by plugging or sleeve connection, and the needle hub 200 can be sleeved onto the adapter assembly 10, or the adapter assembly 10 can be sleeved onto the needle hub 200. After the needle hub 200 and the adapter assembly 10 are mated and connected, the axis of the needle hub 200 is collinear with the positioning reference center, so that the adapter assembly 10 and the needle hub 200 are coaxially plugged or sleeved.

[0051] The purpose of the adjustment assembly 20 is to change the circumferential orientation angle of the needle hub 200 by driving at least one of the adapter assembly 10 and the needle hub 200 to move. Once the adapter assembly 10 and the needle hub 200 are securely engaged, the adjustment assembly 20 can drive the adapter assembly 10 to its reference position, thereby adjusting the position of the needle hub 200. Alternatively, the adjustment assembly 20 can drive the needle hub 200 to move while allowing the adapter assembly 10, currently in the reference position, to remain in its current position until the needle hub 200 and the adapter assembly 10 are securely engaged.

[0052] No matter how the adjustment component 20 is adjusted, the prerequisite for completing the position adjustment of the needle seat 200 is that the needle seat 200 and the adapter component 10 at least form a fixed fit that cannot rotate relative to each other in the circumferential direction (for the convenience of description, hereinafter referred to as circumferential anti-rotation fit); the sign that the position of the needle seat 200 is completed is that the adapter component 10 reaches or is in its reference position, and at the same time is in circumferential anti-rotation fit with the needle seat 200.

[0053] The accessory reversing mechanism 100 according to two embodiments is introduced below.

[0054] Example 1

[0055] The adapter assembly 10 and the adjustment assembly 20 respectively include a linkage unit 11 and a reversing unit 21. The linkage unit 11 is used to form at least a circumferential anti-rotation fixed fit with the needle seat 200, and the two can move synchronously as a whole after the fit; the reversing unit 21 is driven and connected to the linkage unit 11, and is used to drive the needle seat 200 and the linkage unit 11 to move synchronously after the fixed fit, and allow the linkage unit 11 to approach its reference position until the linkage unit 11 stops when it reaches the reference position. As described above, the circumferential anti-rotation fit does not mean that the linkage unit 11 and the needle seat 200 are completely fixed and cannot be separated. Instead, when the reversing unit 21 outputs the reversing adjustment power, the needle seat 200 and the linkage unit 11 can remain relatively stationary in the circumferential direction, and the needle seat 200 will not rotate on the linkage unit 11.

[0056] For the needle seat 200, its preset position is the position that meets the assembly and positioning requirements of the subsequent workstation; for the linkage unit 11, its reference position is the position of the linkage unit 11 when the linkage unit 11 and the needle seat 200 are in a fixed fit, and the linkage unit 11 moves to a certain specific position / angle so that the needle seat 200 reaches the preset position; for the reversing unit 21, its reversing adjustment termination position is the position of the power output end of the reversing unit 21 when the reversing unit 21 drives the linkage unit 11 to move to a certain specific position / angle so that the needle seat 200 just meets the assembly and positioning requirements of the subsequent workstation.

[0057] See also Figures 1 to 2 The reversing unit 21 is a driving source capable of outputting angular displacement for the linkage unit 11, and specifically, a rotary motor can be employed. The linkage unit 11 is servo-connected to the power output of the reversing unit 21, allowing the linkage unit 11 to rotate synchronously with the power output of the reversing unit 21. Therefore, the output displacement of the reversing unit 21 is the actual angular displacement of the linkage unit 11.

[0058] Preferably, the linkage unit 11 is a rotating body structure, and the angular displacement rotation center output by the reversing unit 21 is collinear with the positioning reference center of the linkage unit 11. Therefore, after the needle seat 200 and the linkage unit 11 are adapted and connected, the axis of the needle seat 200 coincides with the rotation center of the power output end of the reversing unit 21.

[0059] It is worth noting that the ability of the reversing unit 21 to output angular displacement refers to the reversing unit 21 as a whole driving the linkage unit 11 to cause the linkage unit 11 to rotate, and should not be understood as the power source in the reversing unit 21 itself outputting rotation. For example, the reversing unit 21 may include a power source that outputs linear displacement and a transmission assembly. The power source may be a linear motor or a cylinder, and the transmission assembly may be a gear-rack transmission assembly or a synchronous belt-pulley assembly. The power source directly drives the connected rack or synchronous belt to achieve linear displacement. The rack is connected to the linkage unit 11 via a gear, or the synchronous belt is connected to the linkage unit 11 via a pulley, thereby changing the direction of power transmission and driving the linkage unit 11 to rotate.

[0060] After loading, the needle seat 200 can move relatively close to the linkage unit 11 along the rotation center of the power output end of the reversing unit 21, so that the needle seat 200 is initially coaxially plugged / sleeved into the linkage unit 11. After plugging / sleeving, the axis of the needle seat 200 is collinear with the positioning reference center. This process is called the needle seat 200 reaching the position adjustment position. It is worth noting that reaching the position adjustment position does not mean that the needle seat 200 and the linkage unit 11 form a circumferential anti-rotation fit. It is also necessary to further adjust the circumferential angle of the needle seat 200 relative to the linkage unit 11 in order to further plug / sleeve the two. After that, the needle seat 200 and the linkage unit 11 form a circumferential anti-rotation fit in a true sense. There is no unique method for reaching the position adjustment position. It can be to actively move the needle seat 200 into place using other components, or to directly drop the needle seat 200 onto the linkage unit 11. One specific method will be explained in detail below and will not be discussed here.

[0061] It can be understood that in other embodiments, the angular displacement centers of the needle seat 200, the linkage unit 11 and the reversing unit 21 do not need to be coaxially arranged, as long as the needle seat 200 and the linkage unit 11 are coaxially connected; in addition, the linkage unit 11 and the reversing unit 21 do not need to be directly connected, and a speed change or transmission component, such as a reducer, can be set between the two.

[0062] As mentioned above, conventional biopsy needle hubs 200 are usually provided with an adapter portion. In addition to determining whether the relative position / angle relationship between the hub 200 and the needle 300 meets the assembly positioning requirements, the adapter portion can also be used to achieve circumferential anti-rotation fit between the hub 200 and the linkage unit 11.

[0063] See also Figures 1 to 4The linkage unit 11 includes a circumferential mating portion 111, which is a solid of revolution or defines a spatial region with the same shape as a solid of revolution, for inserting or sleeve-engaging the needle hub 200, and a circumferential positioning portion 112 for limiting the circumferential rotational freedom of the needle hub 200 (rotation of the needle hub 200 about its own axis). The axis of the circumferential mating portion 111 serves as the positioning reference center of the linkage unit 11, and the circumferential positioning portion 112 uniquely defines the position at which the needle hub 200 and the linkage unit 11 are fixedly mated. When the needle hub 200 is initially inserted into / sleeved on the linkage unit 11, only when the mating portion of the needle hub 200 and the circumferential positioning portion 112 are aligned can they fit together and achieve circumferential anti-rotational engagement between the needle hub 200 and the linkage unit 11. In other cases, the needle hub 200 cannot form a reliable fixed engagement with the linkage unit 11, and the needle hub 200 cannot rotate synchronously with the linkage unit 11.

[0064] The circumferential positioning portion 112 can be or include a positioning boss protruding from the end surface or side wall of the circumferential matching portion 111, or an open groove defined by the end surface of the circumferential positioning portion 112. The specific form is not limited, but it needs to be compatible with the adapter portion of the needle seat 200. Figure 2 As shown, in the first embodiment, the bottom end of the needle hub 200 is provided with a groove extending along its alignment, the circumferential mating portion 111 is a recessed groove for sleeve-mounting the bottom end of the needle hub 200, and the circumferential positioning portion 112 is a positioning boss protruding from the inner wall of the recessed groove and having a width that matches the width of the groove on the needle hub 200. It is understood that in other embodiments, the needle hub 200 can also be sleeved on the linkage unit 11; the mating portion is a positioning boss protruding from the inner or outer wall of the needle hub 200, and the circumferential positioning portion 112 defines a positioning groove that matches the positioning boss of the needle hub 200. This will not be elaborated in detail here.

[0065] The adjustment assembly 20 further includes an auxiliary unit 30, which is connected to and can drive at least one of the linkage unit 11 and the needle seat 200 to move closer to the other along the positioning reference center. Therefore, one of the purposes of providing the auxiliary unit 30 is to make the linkage unit 11 and the needle seat 200 approach each other along the axial direction and achieve plug-in or sleeve connection. Figure 1-Figure 3In the first embodiment, the auxiliary unit 30 includes a pressing element 31 for connecting the needle seat 200 and a force-applying element (not shown) connected to the pressing element 31. The force-applying element is used to drive the pressing element 31 and the adapter assembly 10 to move relatively close to each other so that a close contact with a certain pressure is formed between the pressing element 31 and the needle seat 200. The force-applying element can preferably be an elastic element. Before the needle seat 200 and the linkage unit 11 form a circumferential anti-rotation fit, that is, when the needle seat 200 and the linkage unit 11 form a preliminary plug-in / sleeve connection, the pressing element 31 is fixedly connected to the needle seat 200, and the elastic element is in a compressed state and has an elastic deformation freedom to drive the pressing element 31 and the linkage unit 11 to move relatively close to each other. The elastic element preferably adopts a cylindrical spring whose telescopic deformation direction is parallel to the positioning reference center.

[0066] The elastic element continues to maintain this elastic effect, and then activates the reversing unit 21, which drives the linkage unit 11 to rotate. Although the needle hub 200 and the linkage unit 11 are initially plugged / sheathed, the linkage unit 11 can still rotate relative to the fixed needle hub 200. During the rotation, the angle between the adapter and the circumferential positioning portion 112 gradually changes until the adapter and the circumferential positioning portion 112 are aligned. Under the coordinated action of the elastic element and the pressing element 31, the needle hub 200 is further pushed against the linkage unit 11, the depth of the mutual plugging / sheathing between the two increases, and the adapter and the circumferential positioning portion 112 are adapted and fixed. At this point, the circumferential rotation-stopping fit between the needle hub 200 and the linkage unit 11 is formed.

[0067] By providing the pressing element 31 and the elastic element, the needle hub 200 can be subjected to an external axial force before forming a circumferential anti-rotation fit with the linkage unit 11. This external force can accelerate the insertion or sleeve connection between the needle hub 200 and the linkage unit 11. As long as the linkage unit 11 is rotated to a certain angle so that the circumferential positioning portion 112 and the matching portion of the needle hub 200 are exactly aligned, the auxiliary unit 30 can quickly push the needle hub 200 and the linkage unit 11 to form a sufficient circumferential anti-rotation fit.

[0068] It can be understood that in other embodiments, the force-applying element / elastic element can also be directly connected to the linkage unit 11, or indirectly connected to the linkage unit 11 by connecting to the reversing unit 21, and the type of elastic element is not limited to a cylindrical spring, as long as the elastic element has the deformation freedom to drive the pressure element 31 and the linkage unit 11 to move relatively close.

[0069] Furthermore, the accessory reversing mechanism 100 also includes a detection unit inductively connected to the auxiliary unit 30 or the reversing unit 21. The detection unit is used to detect whether the needle hub 200 and the linkage unit 11 form a circumferential anti-rotation fit. When the needle hub 200 and the linkage unit 11 are fully plugged or sleeved (i.e., circumferentially anti-rotation fit), the detection unit generates a sensing signal. At this time, the auxiliary unit 30 can immediately respond to the sensing signal and remove its force restraint on the needle hub 200. Because the reversing unit 21 will continue to drive the linkage unit 11 and needle hub 200 to rotate until the linkage unit 11 reaches its reference position, the auxiliary unit 30's removal of the force restraint on the needle hub 200 can prevent damage or breakage of the needle hub 200.

[0070] The auxiliary unit 30 can remove the force constraint on the needle hub 200 in two ways: the auxiliary unit 30 actively disengages from the needle hub 200, or the auxiliary unit 30 and the needle hub 200 slide relative to each other. In the latter case, there is initially a certain amount of pre-load between the auxiliary unit 30 and the needle hub 200, but this pre-load is insufficient to resist the synchronous rotation of the linkage unit 11 and the needle hub 200 after the circumferential anti-rotation engagement. Therefore, by controlling the contact pressure between the auxiliary unit 30 and the needle hub 200, the needle hub 200 and the pressing element 31 of the auxiliary unit 30 are relatively fixed when the needle hub 200 and the linkage unit 11 are pre-connected / sleeved. However, after the needle hub 200 and the linkage unit 11 are circumferentially anti-rotationally engaged, the pressing element 31 and the needle hub 200 slide relative to each other.

[0071] Optionally, the detection unit includes a force sensor inductively connected to the reversing unit 21, for sensing an external torque applied to the reversing unit 21. This external torque is essentially a reaction torque exerted by the auxiliary unit 30 on the linkage unit 11 through the needle hub 200 after the needle hub 200 and the linkage unit 11 form a circumferential anti-rotation fit, and is fed back to the force sensor via the reversing unit 21. Before the needle hub 200 and the linkage unit 11 form a circumferential anti-rotation fit, the above-mentioned reaction torque does not exist. Even if the needle hub 200 and the linkage unit 11 rotate relative to each other during initial insertion / initial sleeve connection, the sliding friction between the two will not trigger the detection unit to generate a sensing signal.

[0072] Therefore, the force sensor's sensing of the aforementioned counter-torque can serve as a basis for determining whether the needle hub 200 and the linkage unit 11 have in fact formed a circumferentially fixed engagement. As soon as the counter-torque is sensed, the force sensor generates a sensing signal and separates the auxiliary unit 30 from the needle hub 200, whereupon the needle hub 200 is completely driven by the linkage unit 11. It will be appreciated that, based on the principle of force interaction, the force sensor can also be inductively connected to the auxiliary unit 30 to sense external torque acting on the needle hub 200.

[0073] Optionally, the detection unit can be used to detect changes in the minimum distance between the pressing element 31 and the adapter assembly 10. For example, when the needle hub 200 and the linkage unit 11 switch from preliminary plug-in / sleeve engagement to a fully circumferential, non-rotatable engagement, the overlap between the needle hub 200 and the linkage unit 11, i.e., the depth of their mutual plug-in / sleeve engagement, increases, which means that the distance between the pressing element 31 and the linkage unit 11 decreases. The detection unit can be a photoelectric switch, a proximity switch, or a fiber optic sensor. Of course, the change in the distance between the pressing element 31 and the linkage unit 11 can also be converted into a force change, with the force change signal being sensed by the detection unit.

[0074] It is worth noting that when a servo drive source is used for the reversing unit 21, the aforementioned force sensor is not necessary, as the servo drive source itself has or can have the capability to sense external impedance force / torque. For example, when the servo drive source senses a reaction torque or when the sensed reaction torque increases, it generates a sensing signal. The control system of the accessory reversing mechanism 100 can then receive the sensing signal and control the auxiliary unit 30 to stop applying the force restraining action on the needle seat 200.

[0075] Furthermore, the accessory reversing mechanism 100 also includes a feeding unit 50 and a moving unit 40. The former reciprocates between the loading position and the linkage unit 11, and is used to obtain the needle seat 200 one by one and move the needle seat 200 to the linkage unit 11. The latter reciprocates between the linkage unit 11 and the installation position, and is used to obtain the needle seat 200 and move the needle seat 200 to the installation position after the linkage unit 11 reaches the reference position.

[0076] In particular, the feeding unit 50 and the material moving unit 40 can operate synchronously. When the material moving unit 40 moves the first needle seat 200 that has completed position adjustment to the installation position, the feeding unit 50 also completes the transfer of the second needle seat 200 to the linkage unit 11; when the material moving unit 40 moves back from the installation position to the linkage unit 11 to obtain the second needle seat 200, the feeding unit 50 moves back from the linkage unit 11 to the upper feeding position to obtain the third needle seat 200.

[0077] See also Figure 1 and Figure 3The loading position is the end of the feeding mechanism 400 relatively close to the accessory reversing mechanism 100, that is, the discharge end of the feeding mechanism 400, and the needle seat 200 is arranged in a row according to the extension direction of the feeding mechanism 400; the installation position is the needle seat-needle plug-in assembly station, and the needle seat 200 transferred to the installation position is in a preset position. At this time, the needle seat 200 is fixedly clamped by the auxiliary unit 30, and the needle 300 with the pre-adjusted position is moved to a position coaxial with the needle seat 200 and the base of the needle 300 is pointed to the needle seat 200, and then the needle seat 200 and the needle 300 are driven to move relatively close to each other along the axial direction to plug the base of the needle 300 into the needle seat 200.

[0078] Specifically, the feeding unit 50 first moves the needle seat 200 to the outside of the linkage unit 11 and makes the needle seat 200 coaxial with the linkage unit 11, and then the auxiliary unit 30 applies an axial pushing force to the needle seat 200 to make the needle seat 200 and the linkage unit 11 relatively close; the needle 300 with adjusted position is driven and moved by the turntable assembly (not shown in the figure), and the feeding unit 40 moves the needle seat 200 in the direction away from the linkage unit 11, and then drives the needle seat 200 to move downward along its axial direction for a distance, and the turntable assembly then drives the needle 300 with the needle tip vertically upward to the top of the needle seat 200 and coaxial with the needle seat 200, and then the needle insertion unit 500 drives the needle 300 to move axially close to the needle seat 200, and the base of the needle 300 is inserted into the through hole of the needle seat 200. After assembly is completed, the turntable assembly will move the needle seat 200 and the needle tool 300 connected as one away from the installation position. The clamping claw on the material moving unit 40 for clamping the needle seat 200 will move upward along the axial direction of the previous needle seat 200, and then the material moving unit 40 will move back to the linkage unit 11 to obtain the next needle seat 200.

[0079] The material moving unit 40 and the material feeding unit 50 each have a horizontal motion stroke. Preferably, the distance between the two remains constant in the horizontal direction, and the distance between the two is the same as the distance between the linkage unit 11 and the loading position, and the distance between the linkage unit 11 and the installation position. The material moving unit 40 and the material feeding unit 50 can respectively reach the installation position and above the linkage unit 11 at the same time, and can also respectively reach above the linkage unit 11 and the loading position at the same time.

[0080] Example 2

[0081] Different from the adjustment scheme in Example 1 in which the reversing unit 21 is used to drive the linkage unit 11 and the needle seat 200 to rotate synchronously to approach the reference position together, the adjustment component 20 in Example 2 is connected to the needle seat 200 and drives the needle seat 200 to rotate relative to the adapter component 10. The adapter component 10 is fixedly arranged. At this time, the adapter component 10 is already in the reference position. During the entire position adjustment process, the adapter component 10 does not move.

[0082] Specifically, in the second embodiment, the adapter assembly 10 can also be coaxially plugged or sleeved with the needle hub 200, and it has a positioning reference center that defines the radial position of the needle 300 relative to itself. Preferably, the circumferential mating portion 111 of the adapter assembly 10 defines a recessed groove for sleeve-mounting the end of the needle 300, and the positioning reference center is the axis of the recessed groove. The circumferential positioning portion 112 includes a positioning boss protruding from the inner wall of the circumferential mating portion 111. The adapter portion of the needle hub 200 defines a positioning groove located on the end face of the needle hub 200. Of course, the circumferential mating portion 111 can also be a boss on which the needle hub 200 can be sleeved, and the axis of the boss is the positioning reference center of the adapter assembly 10. The adapter portion of the needle hub 200 can also be located on the needle hub. The positioning boss on the inner or outer wall of 200 is not elaborated in detail here; the adjustment assembly 20 includes a reversing unit 21 for driving the needle hub 200 to rotate. The reversing unit 21 drives the needle hub 200 to rotate around the positioning reference center, continuously changing the angle between the circumferential positioning portion 112 and the adapter portion of the needle hub 200 until the adapter portion of the needle hub 200 and the circumferential positioning portion 112 of the adapter assembly 10 are located on the same alignment. At this time, the needle hub 200 and the adapter assembly 10 can be driven to further plug or sleeve together, thereby forming a circumferential anti-rotation fit. After the needle hub 200 and the adapter assembly 10 are fixedly matched, the reversing unit 21 immediately disengages from the needle hub 200 and no longer drives the needle hub 200 to rotate. Therefore, the reversing unit 21 will not continue to apply torque to the adapter assembly 10 through the needle hub 200, so that the adapter assembly 10 can continue to maintain its reference position without changing.

[0083] In the second embodiment, an auxiliary unit 30 can also be provided. The auxiliary unit 30 can be connected to the adjustment assembly 20 and exert a thrust or pressure directed toward the adapter assembly 10 on the adjustment assembly 20, thereby generating pressure between the needle hub 200 and the adapter assembly 10. This can limit the freedom of the needle hub 200 and the adapter assembly 10 to move away from each other and accelerate the progress of the needle hub 200 and the adapter assembly 10 forming a circumferential anti-rotation fit, thereby avoiding the situation where the adapter portion of the needle hub 200 and the circumferential positioning portion 112 of the adapter assembly 10 are already in the same alignment due to insufficient axial pressure between the needle hub 200 and the adapter assembly 10. In addition, the auxiliary unit 30 can also be directly connected to the needle hub 200, in which case the adjustment assembly 20 drives the connection to the auxiliary unit 30 and thereby indirectly drives the needle hub 200 to rotate. Of course, the auxiliary unit 30 can also be connected to the adapter assembly 10, in which case the auxiliary unit 30 and the adjustment assembly 20 respectively sandwich the needle hub 200 and the adapter assembly 10 therebetween.

[0084] In the second embodiment, a detection unit may also be provided to detect whether the needle hub 200 and the adapter assembly 10 form a circumferentially fixed fit. The detection unit may be inductively connected to the adjustment assembly 20 or to the auxiliary unit 30. When the needle hub 200 and the adapter assembly 10 are circumferentially fixed, the detection unit detects the reaction torque and generates a sensing signal. In response to the sensing signal, the adjustment assembly 20 can immediately stop outputting the driving force, thereby stopping the rotation of the needle hub 200, and separate from the needle hub 200 to prevent the needle hub 200 from being further driven and breaking.

[0085] In the second embodiment, the reversing unit 21 can be used to directly connect the needle seat 200 for rotation. When the needle seat 200 is not plugged in or sleeved on the adapter component 10, the output end of the reversing unit 21 is relatively fixed to the needle seat 200, and a moderate pre-pressure is maintained between the two. After the needle seat 200 and the adapter component 10 are circumferentially fixed, the static friction between the output end of the reversing unit 21 and the needle seat 200 is not enough to resist the adapter component 10. At this time, the output end of the reversing unit 21 and the needle seat 200 slide relative to each other, thereby stopping the reversing unit 21 from applying force constraint to the needle seat 200.

[0086] In the second embodiment, the auxiliary unit can also be used to directly connect to the needle hub 200, and the auxiliary unit is also connected to the output end of the reversing unit 21, that is, the reversing unit 21 is indirectly connected to the needle hub 200 through the auxiliary unit. When the needle hub 200 is not plugged into or sleeved on the adapter assembly 10, the auxiliary unit and the needle hub 200 are relatively fixed, and a moderate pre-pressure is maintained between the two. However, after the needle hub 200 and the adapter assembly 10 are circumferentially fixed, the static friction between the auxiliary unit and the reversing unit 21 is insufficient to resist the adapter assembly 10. At this time, the auxiliary unit and the reversing unit 21 slide relative to each other, thereby terminating the power output of the reversing unit 21 to the auxiliary unit.

[0087] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above 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.

[0088] 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. An accessory reversing mechanism for adjusting and constraining the position of medical consumable accessories, characterized in that: The accessory reversing mechanism comprises: An adapter component, used to form a fixed fit with the consumable accessory and having a reference position; and an adjusting component connected to and capable of driving at least one of the adapter component and the consumable accessory to move, and configured to enable the adapter component to reach or maintain the reference position after the adapter component and the consumable accessory form a fixed fit; The adapter assembly includes a linkage unit and has a positioning reference center, the linkage unit is used to form a circumferential rotation-stopping fixed fit with the consumable accessory, and the positioning reference center is used to limit the position of the consumable accessory relative to the adapter assembly in the radial direction. The adjustment assembly includes a reversing unit and an auxiliary unit, the reversing unit is driven to connect the linkage unit, and the auxiliary unit is connected to one of the adapter assembly and the consumable accessory, and limits the freedom of the two to move away from each other along the positioning reference center; The accessory reversing mechanism further includes a detection unit connected to one of the auxiliary unit and the reversing unit, and capable of generating a sensing signal when the linkage unit and the consumable accessory form a circumferential rotation-stopping fixed fit, so that the auxiliary unit responds to the sensing signal and cancels the force acting on the consumable accessory; or, The reversing unit is a servo drive source, which can generate an induction signal when the linkage unit and the consumable accessory form a circumferential anti-rotation fixed fit, so that the auxiliary unit responds to the induction signal and cancels the force acting on the consumable accessory.

2. The accessory reversing mechanism according to claim 1, characterized in that: The auxiliary unit includes a pressing element for connecting to a consumable accessory and a force-applying element connected to the pressing element and / or the adapter assembly, wherein the force-applying element is used to make the pressing element contact the consumable accessory.

3. The accessory reversing mechanism according to claim 1, characterized in that: The auxiliary unit includes a pressing element for connecting the consumable accessory and capable of moving relatively close to the adapter assembly, and the detection unit is used to detect the distance between the pressing element and the adapter assembly.

4. The accessory reversing mechanism according to claim 1, characterized in that: The adapter assembly includes a linkage unit, which defines a relative position for the consumable accessory to form a circumferential fixed fit therewith; The adjustment component includes a reversing unit that is driven and connected to the linkage unit. The reversing unit is used to drive the linkage unit and the consumable accessories to move synchronously toward the reference position in a fixed and matched state, and stop running when reaching the reference position.

5. The accessory reversing mechanism according to claim 4, characterized in that: The reversing unit is a driving source capable of outputting angular displacement, the linkage unit is connected to the power output end of the reversing unit and can rotate synchronously with the power output end; the linkage unit can cooperate with the consumable accessories to prevent circumferential rotation.

6. The accessory reversing mechanism according to claim 1, characterized in that: The adapter assembly includes a circumferential positioning portion, which is used to limit the freedom of circumferential rotation of the consumable accessory and uniquely define the relative position of the consumable accessory and the adapter assembly to form a fixed fit.

7. The accessory reversing mechanism according to claim 6, characterized in that: The adapter assembly also includes a circumferential mating portion for plugging or socketing consumable accessories, and the circumferential positioning portion includes a positioning boss protruding from the end face or side wall of the circumferential mating portion; and / or the circumferential positioning portion defines an open groove on the end face of the circumferential mating portion.

8. The accessory reversing mechanism according to claim 1, characterized in that: The adapter assembly uniquely defines a position for the consumable accessory to form a circumferential fixed fit therewith; The adjustment component includes a reversing unit for connecting the consumable accessory or the adapter component, and the reversing unit can drive the consumable accessory and the adapter component to rotate relative to each other until the consumable accessory and the adapter component are circumferentially fixed and then stop applying force constraint to the consumable accessory or the adapter component.

9. The accessory reversing mechanism according to claim 8, characterized in that: The reversing unit is used to connect the consumable accessory, and the reversing unit can slide relative to the consumable accessory when the consumable accessory and the adapter assembly are circumferentially fixed.

10. The accessory reversing mechanism according to claim 8, characterized in that: The adjustment assembly further includes an auxiliary unit connected to the reversing unit, and the auxiliary unit can slide relative to the reversing unit when the consumable accessory and the adapter assembly are circumferentially fixed.

11. The accessory reversing mechanism according to claim 8, characterized in that: The adjustment assembly further includes an auxiliary unit connected to the consumable accessory, and the auxiliary unit can slide relative to the consumable accessory when the consumable accessory is circumferentially fixed to the adapter assembly.

12. The accessory reversing mechanism according to claim 8, characterized in that: The adjustment component also includes a synchronization unit, the reversing unit drives and connects the synchronization unit, and the synchronization unit includes a synchronization transmission part respectively used to connect multiple consumable accessories or multiple adapter components. The multiple synchronization transmission parts can follow the power output of the reversing unit and move synchronously in the same orientation.

13. The accessory reversing mechanism according to claim 1, characterized in that: The accessory reversing mechanism also includes a feeding unit and a material moving unit; the feeding unit reciprocates between the loading position and the adapter component to obtain and transfer the consumable accessories to the adapter component; the material moving unit reciprocates between the adapter component and the installation position to obtain and transfer the consumable accessories to the installation position when the adapter component is in the reference position; the feeding unit and the material moving unit can operate synchronously.

Images