Filling equipment for small-volume injection

Abstract

The invention discloses small-capacity injection filling equipment, and relates to the technical field of filling and sealing equipment, the small-capacity injection filling equipment comprises an equipment body, a main shaft is fixedly connected to the middle position of the top surface of the equipment body, the top end of the main shaft is rotatably connected with a rotating disc through a frame body, and a plurality of sets of storage grooves for storing medicine bottles are formed in the edge position of the rotating disc; a feeding plate is arranged on one side of the rotating disc, a discharging plate is arranged on the other side of the rotating disc, and a filling machine is fixedly installed on the equipment body. The device is reasonable in structure, medicine bottles on the feeding plate can conveniently enter the storage groove one by one through the feeding assembly, then the medicine in the storage groove is fixed through the clamping assembly, finally, the rotating disc is rotated through the driving assembly, and the filling machine quantitatively injects the medicine into the medicine bottles; and the medicine bottles are moved to the discharging plate through continuous rotation of the rotating disc for next packaging work.

Description

Technical Field

[0001] This invention relates to the field of filling equipment technology, and in particular to a filling equipment for small-volume injections. Background Technology

[0002] In the medical field, small-volume injections are often required for drug preparation. These injections are widely used and in high demand, so equipment is needed to produce them. During the filling process, the vial needs to be placed at the bottom of the filling head, and then the drug is injected into the vial through the filling head. After that, the sealing process is completed.

[0003] A small-volume injection filling and sealing device, disclosed in CN218949571U, includes a filling and sealing device body. The body comprises a frame, a metering pump, a filling mechanism, and a sealing mechanism. A positioning groove is provided at the bottom of the frame, and a volumetric flask is placed inside the positioning groove. A metering pump is installed at the top of the frame, and one side of the metering pump is connected to the filling mechanism via a delivery pipe. A sealing mechanism is provided at the top of the filling mechanism, and the top of the sealing mechanism is fixedly connected to the top plate of the frame. This small-volume injection filling and sealing device guides the solution into the volumetric flask through the filling mechanism and then guides the sealing mechanism, thus integrating the two devices and reducing costs. After filling, during sealing, the solution adhering to the inner wall of the connecting sleeve is scraped off using a sealing plug, ensuring a uniform solution volume inside each volumetric flask.

[0004] The above invention still has some problems in practical use; The traditional method involves manually placing medicines into positioning slots and then using a metering pump to deliver the medicines into the filling structure to complete the filling and sealing process. This filling process requires manual placement of each medicine into the positioning slot, which is very inefficient. Currently, automated equipment is used for filling, which moves the medicine bottles via a conveyor belt, but this can easily lead to bottle accumulation. Summary of the Invention

[0005] The purpose of this application is to provide a filling device for small-volume injections, which enables the feeding component to easily feed the medicine bottles on the feeding plate into the storage tank one by one, then the clamping component to fix the medicine inside the storage tank, and finally the drive component to rotate the turntable, so that the filling machine injects the medicine into the medicine bottle in a quantitative manner, and the continuous rotation of the turntable moves the medicine bottle to the unloading plate for the next step of sealing.

[0006] To achieve the above objectives, this application provides the following technical solution: a small-volume injection filling device, comprising a device body, a main shaft fixedly connected to the center of the top surface of the device body, a turntable rotatably connected to the top of the main shaft via a frame, a plurality of storage slots for placing medicine bottles being provided on the edge of the turntable, a feeding plate being provided on one side of the turntable, a discharging plate being provided on the other side of the turntable, and a filling machine being fixedly installed on the device body; It also includes a drive assembly, a feeding assembly, and a clamping assembly. The drive assembly is located at the bottom of the turntable for rotating the turntable. The feeding assembly is located on the feeding plate to facilitate the transfer of medicine bottles one by one into the storage slot. The clamping assembly is located on the turntable for fixing the container bottles inside the storage slot.

[0007] Preferably, the drive assembly includes a gear ring fixedly installed on the bottom surface of the turntable, a gear meshing on the gear ring, the gear being fixedly connected to a transmission rod, the bottom end of the transmission rod being rotatably connected to the frame, the frame being fixedly installed on the equipment body, a stepper motor being fixedly installed on the bottom surface of the frame at a position corresponding to the transmission rod, and the bottom end of the transmission rod being fixedly connected to the output end of the stepper motor.

[0008] Preferably, the feeding assembly includes a feeding plate fixedly installed on the equipment body, first bearings are fixedly connected to both sides of the feeding plate, side rods are rotatably connected to the first bearings, a docking plate is fixedly connected to the top of the side rods at a transverse position, the other end of the docking plate is fixedly connected to an arc plate, and a limit wheel is rotatably connected to the other end of the arc plate.

[0009] Preferably, an arm plate is fixedly connected to the bottom end of the side rod at a lateral position. A sliding groove is provided on the arm plate, and a pulley is slidably connected inside the sliding groove. The pulley is rotatably connected to one end of the horizontal plate.

[0010] Preferably, a connecting plate is fixedly connected to the middle horizontal position of the horizontal plate, the other end of the connecting plate is fixedly connected to the slider, the slider is slidably connected to the slide rail, and the slide rail is fixedly installed on the bottom surface of the feeding plate.

[0011] Preferably, a docking seat is fixedly connected to the surface of the slider, a telescopic rod is fixedly connected to the docking seat, the other end of the telescopic rod is fixedly connected to a fixed seat, and the top end of the fixed seat is fixedly connected to the bottom surface of the feeding plate.

[0012] Preferably, the clamping assembly includes a mounting plate fixedly installed on the surface of the turntable and adapted to the storage slot. A pair of rotating shafts are fixedly connected to the mounting plate, and a linkage plate is rotatably connected to the pair of rotating shafts. A clamping block is fixedly connected to the inner wall of the other end of the linkage plate, and a V-shaped groove is formed on the clamping block.

[0013] Preferably, a second bearing is fixedly connected to the middle of the outer surface of the linkage plate, a docking post is fixedly connected to the second bearing, a driven plate is rotatably connected to the top of the docking post, and the other end of the driven plate is rotatably connected to the connector.

[0014] Preferably, a third bearing is fixedly connected to the center of the top surface of the connector, and a slide rod is fixedly connected to the third bearing in a transverse position. The slide rod is movably inserted into the support base, and the bottom end of the support base is fixedly connected to the top surface of the mounting plate. A collar is fixedly connected to the other end of the slide rod, and a spring is sleeved on the slide rod. The two ends of the spring are fixedly connected to one side of the support base and one side of the collar, respectively. A retaining seat is fixedly connected to the other side of the collar in a transverse position, and a fixing post is fixedly connected to the retaining seat. A roller is rotatably connected to the bottom end of the fixing post.

[0015] Preferably, a limiting disk is fixedly connected to the top end of the main shaft, and the edge of the limiting disk is symmetrically provided with protrusions, and the roller is attached to the edge of the limiting disk.

[0016] In summary, the present invention has the following beneficial effects: The present invention has a reasonable structure. When the turntable rotates, the stepper motor operates. A transmission rod is fixedly connected to the output end of the stepper motor. The operation of the stepper motor causes the transmission rod to rotate. A gear is fixedly connected to the top of the transmission rod, and the gear meshes with the gear ring on the bottom surface of the turntable. The rotation of the transmission rod drives the turntable on the gear ring to rotate on the main shaft through the gear, thereby facilitating the conveying of medicines inside the storage tank.

[0017] This invention has a reasonable structure. When medicine bottles need to be placed into the storage slot one by one, the feeding plate is inclined, and the medicine bottles will enter between the arc-shaped plates. Then, the telescopic rod pulls the slider on the docking seat to slide on the slide rail. The movement of the slider drives the horizontal plate to move through the connecting plate. At both ends of the horizontal plate, there are pulleys that are rotatably connected and slidably connected inside the slide groove. The movement of the horizontal plate causes the pulleys to slide inside the slide groove, which facilitates the arm plate to drive the side rod to rotate. The rotation of the side rod drives the arc-shaped plate to rotate through the docking plate, which facilitates the medicine between the arc-shaped plates to enter the storage slot through the feeding plate, avoiding the accumulation of medicine bottles and affecting the feeding effect.

[0018] 3. The present invention has a reasonable structure. When the medicine bottle enters the storage slot, the clamping block is in the open state. As the turntable continues to move, the roller moves against the edge of the limiting plate. When the roller disengages from the protrusion, the spring force causes the slide rod to retract as a whole. Then, the movement of the slide rod pulls the connecting piece through the third shaft seat. The movement of the connecting piece pulls the second shaft seat on the docking column through the driven plate, thereby facilitating the rotation of the linkage plate on the rotating shaft. This allows the inner wall of the V-shaped groove on the clamping block to tightly clamp the surface of the medicine bottle inside the storage slot, preventing the medicine bottle inside the storage slot from falling off when the turntable rotates. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the equipment body; Figure 2 This is a rear-view three-dimensional structural diagram of the equipment body; Figure 3 A schematic diagram of the turntable's three-dimensional structure viewed from below; Figure 4 This is a schematic diagram of the three-dimensional structure of the turntable; Figure 5 This is a schematic diagram of the three-dimensional structure of the feeding plate; Figure 6 A partial three-dimensional structural diagram of the feeding plate, viewed from below. Figure 7 This is a schematic diagram of the clamping component structure.

[0021] In the diagram: 1. Equipment body; 101. Main shaft; 102. Turntable; 103. Storage trough; 104. Feeding plate; 105. Discharging plate; 106. Filling machine; 2. Gear ring; 201. Gear; 202. Transmission rod; 203. Frame; 204. Stepper motor; 3. First shaft seat; 301. Side rod; 302. Connecting plate; 303. Arc plate; 304. Limiting wheel; 305. Arm plate; 306. Slide groove; 307. Pulley; 308. Horizontal plate; 309. Connecting plate; 310. Slider; 3 11. Slide rail; 312. Dating seat; 313. Telescopic rod; 314. Fixed seat; 4. Mounting plate; 401. Rotating shaft; 402. Linkage plate; 403. Clamping block; 404. V-groove; 405. Second shaft seat; 406. Dating column; 407. Driven plate; 408. Connecting piece; 409. Third shaft seat; 410. Slide rod; 411. Support seat; 412. Collar; 413. Spring; 414. Card seat; 415. Fixed column; 416. Roller; 417. Limiting plate; 418. Protrusion. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Reference Figure 1 - Figure 7 The small-volume injection filling equipment shown includes a main body 1. A main shaft 101 is fixedly connected to the center of the top surface of the main body 1. A turntable 102 is rotatably connected to the top of the main shaft 101 via a frame 203. Several sets of storage slots 103 for placing medicine bottles are opened on the edge of the turntable 102. A feeding plate 104 is provided on one side of the turntable 102, and a discharging plate 105 is provided on the other side of the turntable 102. A filling machine 106 is fixedly installed on the main body 1. The equipment also includes a drive assembly, a feeding assembly, and a clamping assembly. The drive assembly is located at the bottom of the turntable 102 for rotating the turntable 102. The feeding assembly is located on the feeding plate 104 to facilitate the transfer of medicine bottles one by one into the storage slots 103. The clamping assembly is located on the turntable 102 for fixing the containers inside the storage slots 103.

[0024] Specifically, it should be noted that the filling machine 106 and the stepper motor 204 are electrically connected to the control panel via wires. Their specific working principles are based on existing technology and will not be elaborated on here. The filling machine 106 facilitates the quantitative injection of medicine into the medicine bottle, and the operation of the stepper motor 204 facilitates the delivery of the medicine.

[0025] As one embodiment of this invention, the drive assembly includes a gear ring 2 fixedly mounted on the bottom surface of the turntable 102. A gear 201 meshes with the gear ring 2. The gear 201 is fixedly connected to the transmission rod 202. The bottom end of the transmission rod 202 is rotatably connected to the frame 203. The frame 203 is fixedly mounted on the equipment body 1. A stepper motor 204 is fixedly mounted on the bottom surface of the frame 203 at a position corresponding to the transmission rod 202. The bottom end of the transmission rod 202 is fixedly connected to the output end of the stepper motor 204.

[0026] Specifically, when the turntable 102 rotates, the stepper motor 204 operates. A transmission rod 202 is fixedly connected to the output end of the stepper motor 204. The operation of the stepper motor 204 causes the transmission rod 202 to rotate. A gear 201 is fixedly connected to the top of the transmission rod 202, and the gear 201 meshes with the gear ring 2 on the bottom surface of the turntable 102. The rotation of the transmission rod 202 drives the turntable 102 on the gear ring 2 to rotate on the main shaft 101 through the gear 201, thereby facilitating the conveying of medicines inside the storage tank 103.

[0027] In one embodiment of this invention, the feeding assembly includes a feeding plate 104 fixedly mounted on the equipment body 1. First shaft seats 3 are fixedly connected to both sides of the feeding plate 104. Side rods 301 are rotatably connected to the first shaft seats 3. A docking plate 302 is fixedly connected to the top of the side rods 301 at a lateral position. The other end of the docking plate 302 is fixedly connected to an arc-shaped plate 303. A limit wheel 304 is rotatably connected to the other end of the arc-shaped plate 303. An arm plate 305 is fixedly connected to the bottom of the side rods 301 at a lateral position. A sliding groove 306 is provided on the arm plate 305, and a sliding component is slidably connected inside the sliding groove 306. A pulley 307 is rotatably connected to one end of a horizontal plate 308. A connecting plate 309 is fixedly connected to the middle of the horizontal plate 308. The other end of the connecting plate 309 is fixedly connected to a slider 310. The slider 310 is slidably connected to a slide rail 311. The slide rail 311 is fixedly installed on the bottom surface of the feed plate 104. A docking seat 312 is fixedly connected to the surface of the slider 310. A telescopic rod 313 is fixedly connected to the docking seat 312. The other end of the telescopic rod 313 is fixedly connected to a fixed seat 314. The top end of the fixed seat 314 is fixedly connected to the bottom surface of the feed plate 104.

[0028] Specifically, when medicine bottles need to be fed into the storage trough 103 one by one, the feeding plate 104 is inclined, and the medicine bottles will enter between the arc plates 303. Then, the telescopic rod 313 pulls the slider 310 on the docking seat 312 to slide on the slide rail 311. The movement of the slider 310 drives the horizontal plate 308 to move through the connecting plate 309. At both ends of the horizontal plate 308, there are rotatably connected pulleys 307, and the pulleys 307 are slidably connected inside the slide groove 306. The movement of the horizontal plate 308 causes the pulleys 307 to slide inside the slide groove 306, which facilitates the arm plate 305 to drive the side rod 301 to rotate. The rotation of the side rod 301 drives the arc plate 303 to rotate through the docking plate 302, which facilitates the medicine between the arc plates 303 to enter the storage trough 103 through the feeding plate 104, avoiding the accumulation of medicine bottles and affecting the feeding effect.

[0029] In one embodiment of this invention, the clamping assembly includes a mounting plate 4 fixedly installed on the surface of the turntable 102, which is adapted to the storage slot 103. A pair of rotating shafts 401 are fixedly connected to the mounting plate 4, and a linkage plate 402 is rotatably connected to the pair of rotating shafts 401. A clamping block 403 is fixedly connected to the inner wall of the other end of the linkage plate 402. A V-groove 404 is provided on the clamping block 403. A second bearing seat 405 is fixedly connected to the middle of the outer surface of the linkage plate 402. A docking post 406 is fixedly connected to the second bearing seat 405. A driven plate 407 is rotatably connected to the top of the docking post 406. The other end of the driven plate 407 is rotatably connected to the connecting member 408. A third bearing seat 409 is fixedly connected to the middle of the top surface of the connecting member 408. A slide rod 410 is fixedly connected to the upper horizontal position. The slide rod 410 is movably inserted into the support base 411. The bottom end of the support base 411 is fixedly connected to the top surface of the mounting plate 4. A collar 412 is fixedly connected to the other end of the slide rod 410. A spring 413 is sleeved on the slide rod 410. The two ends of the spring 413 are fixedly connected to one side of the support base 411 and one side of the collar 412, respectively. A retaining seat 414 is fixedly connected to the other side of the collar 412 in a horizontal position. A fixing post 415 is fixedly connected to the retaining seat 414. A roller 416 is rotatably connected to the bottom end of the fixing post 415. A limiting plate 417 is fixedly connected to the top end of the main shaft 101. A protrusion 418 is symmetrically arranged on the edge of the limiting plate 417. The roller 416 fits against the edge of the limiting plate 417.

[0030] Specifically, when the medicine bottle enters the storage slot 103, the clamping block 403 is in the open state. As the turntable 102 continues to move, the roller 416 moves against the edge of the limiting plate 417. When the roller 416 disengages from the protrusion 418, the spring force of the spring 413 causes the slide rod 410 to retract as a whole. Then, the movement of the slide rod 410 pulls the connecting piece 408 through the third shaft seat 409. The movement of the connecting piece 408 pulls the second shaft seat 405 on the docking column 406 through the driven plate 407, thereby facilitating the rotation of the linkage plate 402 on the rotating shaft 401. This causes the inner wall of the V-shaped groove 404 on the clamping block 403 to tightly clamp the surface of the medicine bottle inside the storage slot 103, preventing the medicine bottle inside the storage slot 103 from falling off when the turntable 102 rotates.

[0031] The working principle of this invention is as follows: When the turntable 102 rotates, the stepper motor 204 operates. A transmission rod 202 is fixedly connected to the output end of the stepper motor 204. The operation of the stepper motor 204 causes the transmission rod 202 to rotate. A gear 201 is fixedly connected to the top of the transmission rod 202, and the gear 201 meshes with the gear ring 2 on the bottom surface of the turntable 102. The rotation of the transmission rod 202 drives the turntable 102 on the gear ring 2 to rotate on the main shaft 101 through the gear 201, thereby facilitating the conveying of medicines inside the storage tank 103. When medicine bottles need to be fed into the storage trough 103 one by one, the feeding plate 104 is inclined, and the medicine bottles will enter between the arc plates 303. Then, the telescopic rod 313 pulls the slider 310 on the docking seat 312 to slide on the slide rail 311. The movement of the slider 310 drives the horizontal plate 308 to move through the connecting plate 309. At both ends of the horizontal plate 308, there are rotatably connected pulleys 307, and the pulleys 307 are slidably connected inside the slide groove 306. The movement of the horizontal plate 308 causes the pulleys 307 to slide inside the slide groove 306, which facilitates the arm plate 305 to drive the side rod 301 to rotate. The rotation of the side rod 301 drives the arc plate 303 to rotate through the docking plate 302, which facilitates the medicine between the arc plates 303 to enter the storage trough 103 through the feeding plate 104, avoiding the accumulation of medicine bottles and affecting the feeding effect of the medicine bottles. When the medicine bottle enters the storage slot 103, the clamping block 403 is in the open state. As the turntable 102 continues to move, the roller 416 moves against the edge of the limiting plate 417. When the roller 416 disengages from the protrusion 418, the spring force of the spring 413 causes the slide rod 410 to retract as a whole. Then, the movement of the slide rod 410 pulls the connecting piece 408 through the third shaft seat 409. The movement of the connecting piece 408 pulls the second shaft seat 405 on the docking column 406 through the driven plate 407, thereby facilitating the rotation of the linkage plate 402 on the rotating shaft 401. This causes the inner wall of the V-shaped groove 404 on the clamping block 403 to tightly clamp the surface of the medicine bottle inside the storage slot 103, preventing the medicine bottle inside the storage slot 103 from falling off when the turntable 102 rotates.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A filling device for small-volume injections, characterized in that, include The equipment body (1) has a main shaft (101) fixedly connected to the middle of the top surface of the equipment body (1). The top of the main shaft (101) is rotatably connected to a turntable (102) through a frame (203). Several sets of storage slots (103) for placing medicine bottles are opened on the edge of the turntable (102). A feeding plate (104) is provided on one side of the turntable (102), and a discharging plate (105) is provided on the other side of the turntable (102). A filling machine (106) is fixedly installed on the equipment body (1). It also includes a drive assembly, a feeding assembly, and a clamping assembly. The drive assembly is located at the bottom of the turntable (102) for rotating the turntable (102). The feeding assembly is located on the feeding plate (104) to facilitate the transfer of medicine bottles one by one into the storage slot (103). The clamping assembly is located on the turntable (102) for fixing the container bottles inside the storage slot (103). The feeding assembly includes a feeding plate (104) fixedly installed on the equipment body (1). First shaft seats (3) are fixedly connected to both sides of the feeding plate (104). Side rods (301) are rotatably connected to the first shaft seats (3). A docking plate (302) is fixedly connected to the top of the side rods (301) at a horizontal position. The other end of the docking plate (302) is fixedly connected to an arc plate (303). A limit wheel (304) is rotatably connected to the other end of the arc plate (303).

2. The filling equipment for small-volume injections according to claim 1, characterized in that: The drive assembly includes a gear ring (2) fixedly installed on the bottom surface of the turntable (102), on which a gear (201) meshes. The gear (201) is fixedly connected to the transmission rod (202). The bottom end of the transmission rod (202) is rotatably connected to the frame (203). The frame (203) is fixedly installed on the equipment body (1). A stepper motor (204) is fixedly installed on the bottom surface of the frame (203) at a position corresponding to the transmission rod (202). The bottom end of the transmission rod (202) is fixedly connected to the output end of the stepper motor (204).

3. The filling equipment for small-volume injections according to claim 1, characterized in that: The bottom end of the side rod (301) is fixedly connected to an arm plate (305) at a horizontal position. A sliding groove (306) is provided on the arm plate (305). A pulley (307) is slidably connected inside the sliding groove (306). The pulley (307) is rotatably connected to one end of the horizontal plate (308).

4. The filling equipment for small-volume injections according to claim 3, characterized in that: A connecting plate (309) is fixedly connected to the middle horizontal position of the horizontal plate (308). The other end of the connecting plate (309) is fixedly connected to the slider (310). The slider (310) is slidably connected to the slide rail (311). The slide rail (311) is fixedly installed on the bottom surface of the feeding plate (104).

5. The filling equipment for small-volume injections according to claim 4, characterized in that: The slider (310) is fixedly connected to a docking seat (312), and a telescopic rod (313) is fixedly connected to the docking seat (312). The other end of the telescopic rod (313) is fixedly connected to a fixed seat (314), and the top end of the fixed seat (314) is fixedly connected to the bottom surface of the feeding plate (104).

6. The filling equipment for small-volume injections according to claim 2, characterized in that: The clamping assembly includes a mounting plate (4) fixedly installed on the surface of the turntable (102) and adapted to the storage slot (103). A pair of rotating shafts (401) are fixedly connected to the mounting plate (4). A linkage plate (402) is rotatably connected to the pair of rotating shafts (401). A clamping block (403) is fixedly connected to the inner wall of the other end of the linkage plate (402). A V-groove (404) is provided on the clamping block (403).

7. The filling equipment for small-volume injections according to claim 6, characterized in that: A second bearing seat (405) is fixedly connected to the middle of the outer surface of the linkage plate (402). A docking post (406) is fixedly connected to the second bearing seat (405). A driven plate (407) is rotatably connected to the top of the docking post (406). The other end of the driven plate (407) is rotatably connected to the connector (408).

8. The filling equipment for small-volume injections according to claim 7, characterized in that: A third bearing seat (409) is fixedly connected to the middle of the top surface of the connector (408). A slide rod (410) is fixedly connected to the third bearing seat (409) in a horizontal position. The slide rod (410) is movably inserted into the support seat (411). The bottom end of the support seat (411) is fixedly connected to the top surface of the mounting plate (4). A collar (412) is fixedly connected to the other end of the slide rod (410). A spring (413) is sleeved on the slide rod (410). The two ends of the spring (413) are fixedly connected to one side of the support seat (411) and one side of the collar (412), respectively. A retaining seat (414) is fixedly connected to the other side of the collar (412) in a horizontal position. A fixing post (415) is fixedly connected to the retaining seat (414). A roller (416) is rotatably connected to the bottom end of the fixing post (415).

9. A filling device for small-volume injections according to claim 8, characterized in that: The top end of the main shaft (101) is fixedly connected to a limiting disk (417), and the edge of the limiting disk (417) is symmetrically provided with protrusions (418), and the roller (416) is attached to the edge of the limiting disk (417).

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