Assembling device for automatic injection pen of pre-filled syringe

Abstract

The invention provides an assembling device for an automatic injection pen of a pre-filled syringe. The assembling device comprises a first base, a second base, a positioning assembly and a pressing assembly. The positioning assembly is connected between the first base and the second base, the positioning groove for installing the injection pen is formed in the positioning assembly, the pressing assembly is slidably connected to the surface of the second base and can move relative to the second base, and after an upper pen container and a lower pen container of the injection pen are placed in the positioning groove, the side face of the pressing plate abuts against the upper pen container; the pressing plate is pushed by the handle to move towards the upper pen container, so that the upper pen container and the lower pen container of the injection pen are matched to assemble the injection pen. The injection pen is assembled by adopting the assembling device, a conventional electromechanical equipment space positioning complex device is replaced, the success rate is high, the yield and the assembling efficiency are improved, and operation and maintenance of technicians are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of pharmaceutical production equipment, and in particular relates to an assembly device for an automatic injection pen of a prefilled syringe. Background Art

[0002] Prefilled syringes are widely used in the packaging and storage of biological drugs, and in medical and battlefield emergency rescue products such as protein products, biological vaccines, water injections, monoclonal antibodies, genetic drugs, snake venom serum, etc. They have a high safety factor and will not have secondary pollution. Prefilled syringes are used with automatic injection pens, which are easy to use and convenient to inject. With the development of society, the demand is surging.

[0003] Patent document with patent application number CN202223439589.4 discloses a semi-automatic assembly machine for injection pens, as shown in the attached drawings of the specification. Fig.11 , including a frame 1, the interior of the frame 1 is a closed space, and one side of the frame 1 is provided with a feed port that can be flipped up through a rotating plate 10; a rotating module 2 is rotatably arranged at the feed port of the frame 1, and a transplanting module 3 is arranged in the closed space of the frame, and is configured to transplant the position of the pen barrel, prefilled needle and pen cap on the rotating module 2; an assembly platform 4 is arranged in the closed space of the frame; a pressing module 5 is arranged above the assembly platform 4 and can be moved laterally, and is used to assemble the pen barrel, prefilled needle and pen cap located on the assembly platform into a product after secondary pressing, and move the assembled product into a receiving box 010; the device requires manual placement of the pen barrel, prefilled needle and pen cap in the corresponding fixture, and then the transplanting module, the pressing module and the assembly platform repeatedly cooperate to realize the assembly of the pen barrel, the prefilled needle and the pen cap into an injection pen.

[0004] The current assembly device structure of the prefilled syringe automatic injection pen is relatively complex, the cost is high, the use area is large, the technical requirements for the operator are high, and it is inconvenient to maintain. Therefore, there is an urgent need to upgrade the assembly device technology of the prefilled syringe automatic injection pen. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides an assembly device for a prefilled syringe automatic injection pen, which not only occupies a small area, has low cost, is simple to operate, but also has high assembly efficiency.

[0006] Specifically, the present invention is achieved through the following technical solutions:

[0007] The present invention provides an assembly device for a prefilled syringe automatic injection pen, comprising:

[0008] A first base, comprising a first support platform and a baffle plate connected to each other, wherein an upper surface of the first support platform and a side surface of the baffle plate are arranged perpendicular to each other;

[0009] A second base is arranged opposite to the first base, the second base comprises a second support platform and a third support platform connected to each other, and the upper surface of the second support platform and the side surface of the third support platform are arranged perpendicular to each other;

[0010] A positioning assembly, disposed between the first base and the second base, the positioning assembly comprising a positioning plate, two ends of the positioning plate are respectively located on the first support platform and the second support platform, and the positioning plate is provided with positioning grooves for fixing the upper pen barrel and the lower pen barrel of the injection pen; and

[0011] A pressing assembly is arranged on the second base, the pressing assembly comprises a pressing plate and a push rod, the pressing plate is slidably connected to the upper surface of the third support platform, and the push rod passes through the pressing plate and is movably connected to the second base;

[0012] When the upper pen barrel and the lower pen barrel of the injection pen are placed in the positioning groove of the positioning assembly, the push rod is held and moved toward the direction of the first base, and the push rod drives the pressing plate to move toward the direction of the first base, so that the side surface of the pressing plate contacts the upper pen barrel of the injection pen and moves toward the direction of the first base, thereby realizing the cooperation between the upper pen barrel and the lower pen barrel to complete the assembly of the injection pen.

[0013] As a preferred technical solution of the present invention, the second support platform is provided with a mounting groove, a through hole and a rotating shaft, the mounting groove is arranged along a direction perpendicular to the plane of the second support platform, the through hole is arranged along a direction parallel to the plane of the second support platform, the through hole is communicated with the mounting groove, and the rotating shaft is fixedly connected in the through hole;

[0014] The upper surface of the third support platform is provided with a first slide groove, a second slide groove and a mounting hole which are arranged at intervals, the mounting hole is located between the first slide groove and the second slide groove, and the mounting hole is communicated with the mounting groove;

[0015] The pressing plate is provided with an inserting hole, and one end of the push rod passes through the inserting hole, the mounting hole, and the mounting groove in sequence to be rotatably connected to the rotating shaft.

[0016] As a preferred technical solution of the present invention, the push rod includes a handle and a movable rod, one end of the movable rod is connected to the handle, and the other end of the movable rod is connected to a fixing hole, and the movable rod passes through the insertion hole and is sleeved on the rotating shaft through the fixing hole, so that the push rod rotates relative to the rotating shaft;

[0017] The insertion hole is arranged in a circular shape, and the diameter of the insertion hole is larger than the diameter of the movable rod.

[0018] As a preferred technical solution of the present invention, the pressing assembly also includes a first slider and a second slider, the first slider and the second slider are connected to the pressing plate at an interval, and the pressing plate is slidably connected to the first slide groove and the second slide groove respectively through the first slider and the second slider, so that the pressing plate can reciprocate on the upper surface of the third support platform.

[0019] As a preferred technical solution of the present invention, the positioning assembly also includes a positioning block, which is located at the bottom of the positioning groove and is arranged close to the first base. The positioning block is used to cooperate with the long hole on the surface of the lower pen barrel of the injection pen to achieve axial positioning of the lower pen barrel.

[0020] As a preferred technical solution of the present invention, the positioning groove is arranged along the length direction of the positioning plate, the cross-section of the positioning groove is semicircular, and the positioning groove cooperates with the upper pen barrel and the lower pen barrel of the injection pen to achieve radial positioning of the upper pen barrel and the lower pen barrel of the injection pen.

[0021] As a preferred technical solution of the present invention, the number of the positioning grooves is one or more, preferably 2, 3, 4, 5 or 6.

[0022] As a preferred technical solution of the present invention, the positioning assembly also includes a mounting plate, which is formed by extending the positioning plate toward the first base, and the height of the mounting plate is less than the height from the bottom of the positioning groove to the bottom of the positioning plate, and the mounting plate is used to hold the lower pen cover of the lower pen barrel of the injection pen.

[0023] As a preferred technical solution of the present invention, the support plate also includes a limit platform, and the positioning plate also includes a receiving platform, the receiving platform is located at one end of the positioning groove facing the second base, and the receiving platform is provided on both sides of each of the positioning grooves, and the upper surface of the receiving platform is flush with the upper surface of the third support platform, so as to facilitate the reciprocating movement of the pressing plate on the upper surface of the third support platform and the upper surface of the receiving platform.

[0024] As a preferred technical solution of the present invention, the groove wall of the positioning groove is also provided with a limiter, and the limiter is arranged in an arc shape, and the distance between the limiter and the arc center is smaller than the radius of the positioning groove, so as to realize the radial positioning of the upper pen barrel and the lower pen barrel of the injection pen.

[0025] The present invention provides an assembly device for an automatic injection pen for prefilled syringes, comprising a first base, a second base, a positioning assembly and a pressing assembly; the positioning assembly is connected between the first base and the second base, a positioning groove for installing the injection pen is provided on the positioning assembly, the pressing assembly is slidably connected to the surface of the second base, and can move relative to the second base; when the upper pen barrel and the lower pen barrel of the injection pen are respectively placed in the positioning grooves, the side surface of the pressing plate contacts the upper pen barrel, and the pressing plate is pushed by a handle to move in the direction of the upper pen barrel, so that the upper pen barrel and the lower pen barrel of the injection pen cooperate to realize the assembly of the injection pen.

[0026] The beneficial effects of the present invention compared with the prior art are as follows:

[0027] (1) The positioning assembly realizes the axial positioning and spatial radial positioning of the upper and lower pen barrels of the automatic injection pen, replacing the conventional complex spatial positioning device of electromechanical equipment. It has a high success rate, which not only improves the yield rate and assembly efficiency, but also facilitates the operation and maintenance of technicians.

[0028] (2) The assembly device of the prefilled syringe automatic injection pen has low cost, small footprint, flexible layout, and improves production quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of the assembly device of the automatic injection pen before operation;

[0030] Figure 2 is a structural schematic diagram of a first base;

[0031] Figure 3 is a schematic diagram of the structure of the second base;

[0032] Figure 4 It is a structural schematic diagram of a pressed assembly;

[0033] Figure 5 It is a schematic diagram of the structure of the cooperation between the second base and the press-fit assembly;

[0034] Figure 6 It is a schematic diagram of the positioning component structure;

[0035] Figure 7 is a structural schematic diagram of the positioning groove;

[0036] Figure 8 It is a schematic diagram of the structure of the assembly device of the automatic injection pen after operation;

[0037] Fig. 9 is another structural schematic diagram of the first base;

[0038] Fig.10 Another schematic diagram of the structure of the automatic injection pen assembly device before operation;

[0039] Fig.11 This is a schematic diagram of the assembly device structure of Comparative Example 1.

[0040] Among them, 100, assembly device; 10, first base; 11, baffle; 12, first support platform; 101, fixing groove; 20, second base; 21, second support platform; 211, mounting groove; 212, through hole; 22, third support platform; 221, first slide groove; 222, second slide groove; 223, mounting hole; 30, pressing assembly; 31, pressing plate; 311, insertion hole; 32, first slider; 33, second slider; 34, push rod; 341, handle; 342, movable rod; 40, positioning assembly; 41, positioning plate; 411, positioning groove; 412, receiving platform; 413, groove wall; 414, limit piece; 415, abutment surface; 42, positioning block; 43, mounting plate; 50, injection pen; 51, upper pen holder; 52, lower pen holder; 53, lower pen cover. DETAILED DESCRIPTION

[0041] Example 1

[0042] like Figure 1 and Figure 2 As shown, an assembly device 100 for a prefilled syringe automatic injection pen includes a first base 10, a second base 20, a pressing assembly 30 and a positioning assembly 40, wherein the pressing assembly 30 is slidably connected to the second base 20, the positioning assembly 40 is located between the first base 10 and the second base 20, and one end of the positioning assembly 40 is connected to the first base 10, and the other end is connected to the second base 20.

[0043] The first base 10 includes a baffle 11 and a first support platform 12. The first support platform 12 and the baffle 11 are connected to each other. For example, the first support platform 12 and the baffle 11 are integrally formed. The baffle 11 is used to contact with the lower pen cover 53 of the injection pen, so that the pressing assembly 30 can push the upper pen barrel 51 and the lower pen barrel 52 of the injection pen to cooperate, so as to realize the assembly of the injection pen. The planes of the first support platform 12 and the baffle 11 are set to be rectangular.

[0044] Please refer to Figure 3 , Figure 4 and Figure 5 The second base 20 is arranged opposite to the first base 10, and the second base 20 includes a second support platform 21 and a third support platform 22. The upper surface of the second support platform 21 and the side surface of the third support platform 22 are arranged perpendicular to each other. For example, the second support platform 21 and the third support platform 22 are integrally formed. One end of the positioning component 40 is located on the upper surface of the first support platform 12, and the other end is located on the upper surface of the second support platform 21, wherein the first base 10 and the second base 20 are both L-shaped.

[0045] The second support platform 21 is provided with a mounting groove 211, a through hole 212 and a rotating shaft. The through hole 212 is connected to the mounting groove 211, and the rotating shaft is fixedly connected in the through hole 212. The mounting groove 211 is formed to extend downward in a direction perpendicular to the upper surface of the second support platform 21, and the through hole 212 is provided in a direction close to the bottom of the second support platform 21. The through hole 212 is formed to extend in a direction parallel to the upper surface of the second support platform 21, so as to penetrate the length direction of the second support platform 21.

[0046] The mounting groove 211 horizontally extends toward the third support platform 22 to communicate with the mounting hole 223 described below. The mounting groove 211 is rectangular in shape, and the through hole 212 is circular in shape.

[0047] A first slide groove 221, a second slide groove 222 and a mounting hole 223 are provided on the upper surface of the third support platform 22. The first slide groove 221, the second slide groove 222 and the mounting hole 223 are arranged at intervals, and the mounting hole 223 is located between the first slide groove 221 and the second slide groove 222, wherein the first slide groove 221 and the second slide groove 222 are both T-shaped grooves, the mounting hole 223 is square, and the mounting hole 223 is connected to the mounting groove 211 on the second support platform 21.

[0048] The pressing assembly 30 includes a pressing plate 31, a first slider 32 and a second slider 33. The first slider 32 and the second slider 33 are spaced apart on one side of the pressing plate 31. The first slider 32 is used for sliding connection with the above-mentioned first slide groove 221, and the second slider 33 is used for sliding connection with the second slide groove 222, so as to realize the pressing plate 31 being slidably connected to the upper surface of the third support platform 22 through the first slider 32 and the second slider 33.

[0049] The pressing plate 31 is configured to be rectangular, and the size of the pressing plate 31 is consistent with the upper surface of the third support platform 22. The pressing plate 31 is provided with an insertion hole 311, and the insertion hole 311 is interconnected with the above-mentioned mounting hole 223 and mounting groove 211. The first slider 32 and the second slider 33 are fixedly connected to one side of the pressing plate 31, for example, the first slider 32 and the second slider 33 are integrally formed with the pressing plate 31, and the first slider 32 and the second slider 33 are configured to be T-shaped to prevent the first slider 32 and the second slider 33 from being separated from the first slide groove 221 and the second slide groove 222 in the longitudinal direction, wherein the longitudinal direction is a direction perpendicular to the upper surface of the third support platform 22.

[0050] Among them, the insertion hole 311 is set to be circular, and the size of the insertion hole 311 is larger than the diameter of the push rod 34 described below, which is convenient for manually operating the push rod 34 to move toward the direction of the first base 10. The push rod 34 located in the insertion hole 311 abuts against its hole wall, driving the pressing plate 31 to push the upper pen barrel 51 to move toward the first base 10. When the side of the pressing plate 31 abuts against the abutment surface 415 of the positioning assembly 40, the upper pen barrel 51 just cooperates with the lower pen barrel 52 to realize the assembly of the injection pen. Then, the push rod 34 is manually operated to move in the direction away from the first base 10, so that the push rod 34 abuts against the hole wall of the insertion hole 311, driving the pressing plate 31 to move in the direction away from the first base 10, so that the pressing plate 31 returns to the initial position, wherein the initial position is the position where the pressing plate 31 completely covers the upper surface of the third support platform 22.

[0051] like Figure 5 As shown, the pressing assembly 30 also includes a push rod 34, which includes a handle 341 and a movable rod 342. One end of the movable rod 342 is connected to the handle 341, and the other end of the movable rod 342 is provided with a fixing hole, which is used to be sleeved on the above-mentioned rotating shaft to realize the rotation connection of the push rod 34 relative to the rotating shaft. Specifically, the end of the push rod 34 away from the handle 341 passes through the insertion hole 311, the mounting hole 223, and the mounting groove 211 in sequence and is rotationally connected to the rotating shaft through its fixing hole.

[0052] See also Figure 6 and Figure 7 The positioning assembly 40 includes a positioning plate 41, one end of which is located on the upper surface of the first support platform 12, and the other end is located on the upper surface of the second support platform 21, and the end side of the positioning plate 41 facing the first base 10 is in contact with the side of the baffle 11, and the end side of the positioning plate 41 facing the first base 10 is in contact with the side of the third support platform 22, so as to better fix the positioning assembly 40 between the first base 10 and the second base 20.

[0053] The positioning plate 41 is set in a rectangular shape, and a positioning groove 411 is set on the positioning plate 41. The positioning groove 411 is opened and extended along the length direction of the positioning plate 41. The positioning groove 411 can be set to one or more. When multiple positioning grooves 411 are set, for example, 2, 3 or 5, the cross section of the positioning groove 411 is semicircular, and the size of the positioning groove 411 in the axial direction and the radial direction is consistent with the upper pen barrel 51 and the lower pen barrel 52 of the injection pen, wherein the axial direction is a direction parallel to the plane of the positioning plate 41, and the radial direction is a direction perpendicular to the plane of the positioning plate 41. The positioning groove 411 is used to realize the positioning of the upper pen barrel and the lower pen barrel of the injection pen.

[0054] The positioning plate 41 further includes a receiving platform 412, and the positioning groove 411 is located between two adjacent receiving platforms 412. A notch is provided at one end of the groove wall 413 of the positioning groove 411 facing the second base 20, and the notch forms the receiving platform 412, and the upper surface of the receiving platform 412 is flush with the upper surface of the third support platform 22, so that the pressing plate 31 can reciprocate on the upper surfaces of the receiving platform 412 and the third support platform 22.

[0055] Each groove wall 413 of the end of the positioning groove 411 close to the first base 10 is provided with a stopper 414, and the stopper 414 is connected to the side of the groove wall 413. For example, the stopper 414 and the groove wall 413 can be integrally formed. The stopper 414 has a certain curvature, and the distance R2 between the stopper 414 and its axis is less than the radius R1 of the positioning groove, so that the radial direction of the injection pen can be positioned, wherein the radial direction refers to the direction perpendicular to the surface of the positioning plate 41, which can prevent the injection pen from radial displacement during the assembly process of the injection pen, thereby improving the assembly accuracy of the injection pen.

[0056] A surface of the groove wall 413 close to the receiving platform 412 forms an abutting surface 415 in contact with the side surface of the pressing plate 31 , and the abutting surface 415 and the upper surface of the receiving platform 412 are perpendicularly arranged to each other.

[0057] The positioning assembly 40 also includes a positioning block 42, which is arranged at the bottom of the positioning groove 411 and close to one end of the first base 10. The positioning block 42 is used to cooperate with the long hole on the lower pen barrel 52 of the injection pen to realize the axial positioning of the lower pen barrel 52 in the positioning groove 411, wherein the axial direction is along the length direction of the positioning plate 41, thereby preventing the lower pen barrel 52 of the injection pen from axial displacement during the assembly process of the injection pen, thereby improving the assembly accuracy of the injection pen.

[0058] Since the diameter of the lower pen cap 53 of the injection pen is larger than the diameter of the lower pen barrel, in order to make the upper pen barrel, the lower pen barrel and the lower pen cap in the same plane, the positioning assembly 40 further includes a mounting plate 43, which is formed by extending the positioning plate 41 toward the first base 10, wherein the height h1 of the mounting plate 43 is smaller than the height h2 from the bottom of the positioning groove 411 to the bottom of the positioning plate 41, so as to facilitate accommodating the lower pen cap 53 of the injection pen.

[0059] In order to prevent the assembly device from moving due to the need for manual force to push the push rod 34 when operating the device to assemble the injection pen, thereby affecting the efficiency of manually operating the assembly device to assemble the injection pen, the bottom of the first base 10 and the second base 20 are provided with fixings fixed to the operating table, and the fixings can be Velcro, screws, double-sided tape, etc.

[0060] The assembly process of the injection pen is as follows: Figure 1 and Figure 8 The injection pen 50 includes an upper pen barrel 51, a lower pen barrel 52 and a lower pen cover 53. Before assembling the injection pen, the lower pen cover 53 is manually buckled and connected with one end of the lower pen barrel 52, and then the injection needle with the injection is placed in the lower pen barrel 52, and then the upper pen barrel 51 and the lower pen barrel 52 are placed in the positioning groove 411 at intervals, and the matching opening of the upper pen barrel 51 and the matching opening of the lower pen barrel 52 are arranged oppositely, and the upper pen barrel 51 of the injection pen 50 is manually placed in the positioning groove 411 and close to one end of the second base 20, and then, the lower pen barrel 52 is placed in the positioning groove 411 and close to one end of the first base 10, and the elongated opening of the lower pen barrel 52 is matched with the positioning block 42, and the lower pen cover 53 of the lower pen barrel 52 is placed on the mounting plate 43, and the lower pen cover 53 abuts against the baffle 11 The side of the upper pen barrel 51 away from the lower pen barrel 52 is in conflict with the side of the pressing plate 31, and the handle 341 is manually held and the push rod 34 is pushed in the first direction, wherein the first direction is the direction toward the first base 10, and the push rod 34 is in conflict with the pressing plate 31, so that the pressing plate 31 pushes the upper pen barrel 51 to move in the first direction, so that the upper pen barrel 51 and the lower pen barrel 52 cooperate, thereby realizing the assembly of the injection pen, and finally, the push rod 34 is manually operated to move in the direction away from the first base 10, so that the push rod 34 is in conflict with the hole wall of the insertion hole 311, and the pressing plate 31 is driven to move in the direction away from the first base 10, so that the pressing plate 31 returns to the initial position, and the assembled injection pen is placed in the storage box, and the next injection pen is assembled. The use of the assembly device to assemble the injection pen not only improves the yield rate and assembly efficiency, but also facilitates the operation and maintenance of the technicians, and the assembly device of the prefilled syringe automatic injection pen occupies a small area and is flexible in layout, thereby reducing the assembly cost.

[0061] Example 2

[0062] Please continue reading Figure 1 and Fig. 9 , which is different from the first embodiment in that the first base 10 is different, and the positioning groove 411 is not provided with a stopper, and the baffle plate 11 of the first base 10 of this embodiment is provided with a fixing groove 101, and the fixing groove 101 is evenly arranged on the side of the baffle plate 11 facing the second base 20, and the fixing groove 101 is used to install the lower pen cover 53 of the lower pen barrel 52, and the size of the fixing groove 101 is adapted to the lower pen cover 53. By installing the lower pen cover 53 of the lower pen barrel 52 in the fixing groove 101, the axial and radial positioning of the lower pen barrel 52 can be achieved, and the injection pen can be prevented from axial and radial displacement during the assembly process of the injection pen, thereby improving the assembly accuracy of the injection pen.

[0063] Example 3

[0064] Please continue reading Figure 1 and Fig.10The difference between this embodiment and embodiment 1 is that the position and installation method of the push rod 34 are different. One end of the push rod 34 of this embodiment is installed on the side of the pressing plate 31, and the other end of the push rod 34 is installed with a handle 341. The pressing plate 31 is pushed toward the first base 10 by holding the handle 341, so that the side of the pressing plate 31 contacts the end of the upper pen barrel 51, thereby realizing that the side of the pressing plate 31 pushes the end of the upper pen barrel 51 to move toward the lower pen barrel 52, realizing the cooperation between the upper pen barrel 51 and the lower pen barrel 52, and completing the assembly of the injection pen.

[0065] When the pressing plate 31 is pushed to move toward the first base 10 , when the side of the pressing plate 30 facing away from the push rod 34 abuts against the abutting surface 415 , the upper pen barrel 51 and the lower pen barrel 52 fit together to complete the assembly of the injection pen.

[0066] Example 4

[0067] The difference between this embodiment and embodiment 1 is that the power mechanism for driving the pressing plate 31 to move is different. This embodiment does not need to use the push rod 34. This embodiment is provided with a driving member in the first slide groove 221 or the second slide groove 222. The driving member includes a driver, a controller, a sensor and a switch. The driver, the sensor and the switch are all electrically connected to the controller. The driver is a micro servo electric cylinder. The micro servo electric cylinder and the controller are fixed in the first slide groove 221. The sensor is arranged on the abutment surface 415. One end of the telescopic rod of the micro servo electric cylinder is fixedly connected to the first slider 32 of the pressing plate 31. The switch is arranged on the outside of the second base 20. The switch is used to control the micro servo electric cylinder to work and shut down. When the switch is turned on, the switch sends a first signal. The controller receives the first signal and controls the micro servo electric cylinder to drive the telescopic rod toward The first base 10 moves in the direction of the telescopic rod, which pushes the first slider 32 of the pressing plate 31 to move toward the first base 10, and the side of the pressing plate 31 abuts against the end of the upper pen barrel 51, so that the side of the pressing plate 31 pushes the end of the upper pen barrel 51 to move toward the lower pen barrel 52. When the side of the pressing plate 31 abuts against the abutting surface, the upper pen barrel 51 and the lower pen barrel 52 cooperate to complete the assembly of the injection pen; when the side of the pressing plate 31 abuts against the abutting surface 415, the sensor sends a second signal, the controller receives the second signal and controls the micro-servo electric cylinder to drive the telescopic rod to move in the direction away from the first base 10, and the telescopic rod drives the pressing plate 31 to move away from the first base 10 until the pressing plate 31 returns to the initial position, and the switch is turned off, and the above operation is repeated to assemble the next injection pen.

[0068] Comparative Example 1

[0069] Please refer to the accompanying drawing of comparative example 1 Fig.11 For specific solutions, please refer to the utility model patent with application number CN202223439589.4.

[0070] Example 5

[0071] Compared with comparative example 1, the efficiency of assembling injection pens using the devices of embodiments 1-4 of the present invention is at least 2 times higher than that of comparative example 1.

[0072] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. An assembly device for a prefilled syringe automatic injection pen, characterized in that: The assembly device comprises: A first base, comprising a first support platform and a baffle plate connected to each other, wherein an upper surface of the first support platform and a side surface of the baffle plate are arranged perpendicular to each other; A second base is arranged opposite to the first base, the second base comprises a second support platform and a third support platform connected to each other, and the upper surface of the second support platform and the side surface of the third support platform are arranged perpendicular to each other; A positioning assembly, disposed between the first base and the second base, the positioning assembly comprising a positioning plate, two ends of the positioning plate are respectively located on the first support platform and the second support platform, and the positioning plate is provided with positioning grooves for fixing the upper pen barrel and the lower pen barrel of the injection pen; and A pressing assembly is arranged on the second base, the pressing assembly comprises a pressing plate and a push rod, the pressing plate is slidably connected to the upper surface of the third support platform, and the push rod passes through the pressing plate and is movably connected to the second base; When the upper pen barrel and the lower pen barrel of the injection pen are placed in the positioning groove of the positioning assembly, the push rod is held by hand and moved toward the direction of the first base, and the push rod drives the pressing plate to move toward the direction of the first base, so that the side surface of the pressing plate contacts the upper pen barrel of the injection pen and moves toward the direction of the first base, thereby realizing the cooperation between the upper pen barrel and the lower pen barrel to complete the assembly of the injection pen.

2. The assembly device for the prefilled syringe automatic injection pen according to claim 1, characterized in that: The second support platform is provided with a mounting groove, a through hole and a rotating shaft, the mounting groove is arranged along a direction perpendicular to the plane of the second support platform, the through hole is arranged along a direction parallel to the plane of the second support platform, the through hole is communicated with the mounting groove, and the rotating shaft is fixedly connected in the through hole; The upper surface of the third support platform is provided with a first slide groove, a second slide groove and a mounting hole which are arranged at intervals, the mounting hole is located between the first slide groove and the second slide groove, and the mounting hole is communicated with the mounting groove; The pressing plate is provided with an inserting hole, and one end of the push rod passes through the inserting hole, the mounting hole, and the mounting groove in sequence to be rotatably connected to the rotating shaft.

3. The assembly device for the prefilled syringe automatic injection pen according to claim 2, characterized in that: The push rod comprises a handle and a movable rod, one end of the movable rod is connected to the handle, and the other end of the movable rod is connected to a fixing hole. After the movable rod passes through the insertion hole, it is sleeved on the rotating shaft through the fixing hole, so that the push rod rotates relative to the rotating shaft; The insertion hole is arranged in a circular shape, and the diameter of the insertion hole is larger than the diameter of the movable rod.

4. The assembly device for the prefilled syringe automatic injection pen according to claim 2, characterized in that: The pressing assembly also includes a first slider and a second slider, the first slider and the second slider are connected to the pressing plate at intervals, and the pressing plate is slidably connected to the first slide groove and the second slide groove respectively through the first slider and the second slider, so that the pressing plate can reciprocate on the upper surface of the third support platform.

5. The assembly device for a prefilled syringe automatic injection pen according to any one of claims 1 to 4, characterized in that: The positioning assembly also includes a positioning block, which is located at the bottom of the positioning groove and is arranged close to the first base. The positioning block is used to cooperate with the long hole on the surface of the lower pen barrel of the injection pen to achieve axial positioning of the lower pen barrel.

6. The assembly device for a prefilled syringe automatic injection pen according to any one of claims 1 to 4, characterized in that: The positioning groove is arranged along the length direction of the positioning plate, the cross section of the positioning groove is semicircular, and the positioning groove cooperates with the upper pen barrel and the lower pen barrel of the injection pen to achieve radial positioning of the upper pen barrel and the lower pen barrel of the injection pen.

7. The assembly device for a prefilled syringe automatic injection pen according to any one of claims 1 to 4, characterized in that: The number of the positioning grooves is one or more.

8. The assembly device for a prefilled syringe automatic injection pen according to any one of claims 1 to 4, characterized in that: The positioning assembly also includes a mounting plate, which is formed by extending the positioning plate toward the first base. The height of the mounting plate is less than the height from the bottom of the positioning groove to the bottom of the positioning plate. The mounting plate is used to hold the lower pen cover of the lower pen barrel of the injection pen.

9. The assembly device for a prefilled syringe automatic injection pen according to any one of claims 1 to 4, characterized in that: The positioning plate also includes a receiving platform, which is located at one end of the positioning groove facing the second base. The receiving platform is provided on both sides of each positioning groove. The upper surface of the receiving platform is flush with the upper surface of the third support platform, so as to facilitate the reciprocating movement of the pressing plate on the upper surface of the third support platform and the upper surface of the receiving platform.

10. The assembly device for a prefilled syringe automatic injection pen according to any one of claims 1 to 4, characterized in that: The groove wall of the positioning groove is also provided with a limiting member, which is arranged in an arc shape, and the distance between the limiting member and its arc center is smaller than the radius of the positioning groove, so as to realize the radial positioning of the upper pen barrel and the lower pen barrel of the injection pen.

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