A turning over type syringe plunger rubber plug cleaning device

Abstract

The present application belongs to the technical field of medical instrument cleaning, and particularly relates to a turnover type syringe push rod rubber plug cleaning device, which comprises a cleaning cavity and a turnover shaft, wherein the turnover shaft is inserted into the middle of the cleaning cavity and is integrally formed; the cleaning cavity is threadedly connected with a cap with a cleaning hole at both ends; the left end of the turnover shaft is rotationally connected with a sleeve with an internal spiral groove and a connecting groove; the right end is slidingly connected with an output shaft through a boss; and the output shaft is driven by an external motor. The left end of the turnover shaft is provided with a ball and a spring; the ball rolls along the spiral groove to generate an axial force to move the turnover shaft to the left; and the spring is energized to push the turnover shaft to quickly reset, so as to realize a combined motion of turnover and axial shaking of the cleaning cavity. The present application has the advantages of simple structure, low manufacturing cost, effective prevention of cleaning hole blockage, and significant improvement of rubber plug cleaning efficiency and cleanliness.

Description

Technical Field

[0001] This invention belongs to the technical field of medical device cleaning, specifically relating to a flip-type syringe plunger cleaning device. Background Technology

[0002] Syringe plunger stoppers are critical components in medical consumables, and their surface cleanliness directly affects drug safety and patient health. During the production process, mold release agents, rubber particles, and dust often remain on the surface after vulcanization, necessitating efficient cleaning before assembly. Currently, the industry commonly uses drum-type or agitator-type cleaning equipment for batch processing of stoppers.

[0003] In the prior art, patent CN205270225U discloses a rubber stopper cleaning machine, which includes a machine body, a main rotating shaft, a cleaning drum, and a spraying device. The drum has stirring ribs inside and an ultrasonic generator on the outside. During operation, the drive device rotates the drum in one direction, relying on the stirring ribs to agitate the rubber stoppers. Simultaneously, multi-angle spraying is performed through a coaxial central spray pipe and inner and outer spray pipes, supplemented by ultrasonic vibration cleaning. Although this solution combines spraying and ultrasonic waves, its cleaning mode is only unidirectional rotation and a fixed spray. Rubber stoppers easily accumulate inside the drum, creating cleaning dead zones in the grooves and edges of the rubber stoppers on the push rod. Furthermore, continuous friction between the stirring ribs and the rubber stoppers can easily cause micro-cracks on the surface of the rubber stoppers, affecting the product's sealing performance and service life. At the same time, the drum can only rotate and lacks axial oscillation, making the cleaning holes easily clogged by fallen impurities, resulting in a significant decrease in cleaning efficiency over long-term use.

[0004] For example, a rubber stopper washing machine with publication number CN209287849U discloses a washing tank, a washing cage, a lifting mechanism, and a lateral movement mechanism. The washing cage has liquid passage holes. The lifting mechanism drives the washing cage to rise and fall, and the lateral movement mechanism drives it to move horizontally. During operation, the rubber stopper is placed in the washing cage, and the lifting and lateral movement cause the washing cage to move back and forth in the washing tank, completing the washing process in conjunction with the water flow in the tank. Although this solution can achieve the movement and washing of the rubber stopper in the tank, it lacks a flipping function. The rubber stopper always slides in a fixed posture in the cage, making it impossible to perform all-round tumbling and washing of its surface. The removal effect on firmly attached release agents, particles, and other impurities is poor. Moreover, the equipment requires two independent drive mechanisms for lifting and lateral movement, resulting in a complex structure, high energy consumption, and inconvenient maintenance, making it difficult to adapt to the needs of small and medium batch flexible production. At the same time, the washing process relies on soaking and water rinsing, without an active anti-clogging design, and the liquid passage holes are easily blocked by rubber stopper debris, affecting the washing effect.

[0005] To address the problems of low cleaning efficiency, easy clogging, complex structure, or damage to rubber stoppers in the existing technologies, this invention proposes a flip-type syringe plunger rubber stopper cleaning device. The device uses a flip shaft to drive the cleaning chamber to achieve a combined flipping and axial impact motion, which improves the uniformity of cleaning while automatically unclogging the cleaning holes with periodic reset impact. The device also reduces manufacturing costs with a simple mechanical structure, making it suitable for large-scale production scenarios. Summary of the Invention

[0006] The purpose of this invention is to provide a flip-type syringe plunger cleaning device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a flip-type syringe plunger rubber stopper cleaning device, comprising a cleaning chamber and a flip shaft, wherein the flip shaft is inserted in the middle of the cleaning chamber and integrally formed with the cleaning chamber; both ends of the cleaning chamber are threadedly connected to caps, and the surface of the caps and the upper and lower sides of the cleaning chamber are provided with a plurality of cleaning holes; the left end of the flip shaft is rotatably connected to a sleeve, and the right end is provided with an output shaft; the inner wall of the output shaft is provided with a groove, and the right end of the flip shaft is provided with bosses at the top and bottom, which are slidably connected to the groove of the output shaft through the bosses; the outer side of the output shaft is integrally formed with a gear, which is connected to an external drive motor through gear transmission; the inner wall of the sleeve is provided with a spiral groove and a connecting groove opposite to each other, and the spiral groove and the connecting groove are interconnected; the outer side of the left end of the flip shaft is rotatably connected to a ball, and the ball is rotatably connected to the spiral groove and the connecting groove; the left end of the flip shaft is connected to a spring, and the spring is located inside the sleeve.

[0008] The present invention further explains that a sensing plate is provided at the connection between the spiral groove and the connecting groove, and a sensing module is provided inside the sensing plate. The sensing module is electrically connected to an external drive motor, and controls the start and stop of the external drive motor by sensing whether the ball is in contact with the sensing plate.

[0009] The present invention further illustrates that a screw disc is threadedly connected to the inner wall of the left end of the sleeve, and the spring is located between the right side of the screw disc and the left end of the flip shaft. Both the right side of the screw disc and the left end of the flip shaft are provided with arc grooves, and the left and right ends of the spring are respectively embedded in the two arc grooves.

[0010] The present invention further illustrates that the right end of the output shaft is threadedly connected to a screw, the right end of the flip shaft is provided with a sliding hole, and the left end of the screw is slidably connected to the sliding hole. The inner wall of the sliding hole is integrally formed with an arc protrusion, and several top blocks are slidably connected to the outer side of the left end of the screw.

[0011] The present invention further illustrates that the plurality of top blocks are arranged in a spiral pattern, and after the screw rotates, the outer surface of the top block comes into contact with the inner wall of the arc-shaped protrusion.

[0012] The present invention further illustrates that a push rod is slidably connected inside the flipping shaft, and a hole is provided at the left end of the screw. The left end of the push rod contacts the right side of the screw disc, and the right end is inserted into the hole of the screw.

[0013] The present invention further illustrates that the interior of the hole is filled with hydraulic oil, and the outer wall has liquid holes arranged in a spiral pattern, and the inner end of the top block is slidably connected to the liquid holes.

[0014] The present invention further illustrates that the edges of the arc-shaped protrusion are rounded.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: The combination of ball bearings and spiral grooves, along with a spring reset mechanism, causes axial impact and shaking during the tumbling of the cleaning chamber, resulting in more thorough tumbling of the rubber plug and significantly improving cleaning efficiency and surface impurity removal rate.

[0016] The periodic axial impact of the cleaning chamber can automatically unclog the cleaning holes, effectively preventing impurities from clogging them, ensuring long-term stable operation, and reducing maintenance frequency.

[0017] The overall mechanical structure is simple and compact, requiring no complex components such as ultrasonic waves, resulting in low manufacturing costs and easy application in various rubber stopper cleaning equipment. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cleaning chamber structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the flip shaft of the present invention; Figure 4 This is an exploded view of the present invention; Figure 5 This is a schematic diagram of the right end of the flipping shaft and the screw of the present invention; Figure 6 This is a schematic diagram of the structure of the left and right ends of the flipping shaft of the present invention; Figure 7 This is a schematic diagram showing the opening positions of the spiral groove and connecting groove of the present invention; Figure 8 This is a plan view showing the positional relationship between the arc-shaped protrusion and the top block of the present invention; In the diagram: 1. Cleaning chamber; 2. Tilting shaft; 21. Ball bearing; 22. Arc protrusion; 23. Top rod; 3. Cap; 4. Sleeve; 41. Spiral groove; 42. Connecting groove; 43. Threaded disc; 5. Output shaft; 51. Screw; 52. Top block; 6. Spring. Detailed Implementation

[0019] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8 The present invention provides a technical solution: a flip-type syringe plunger rubber stopper cleaning device, including a cleaning chamber 1 and a flip shaft 2, wherein the flip shaft 2 is inserted through the middle of the cleaning chamber 1 and is integrally formed with the cleaning chamber 1; Both ends of the cleaning chamber 1 are threaded with caps 3, and several cleaning holes are opened on the surface of the caps 3 and the upper and lower sides of the cleaning chamber 1. The left end of the flip shaft 2 is rotatably connected with a sleeve 4, and the right end is provided with an output shaft 5. The inner wall of the output shaft 5 is provided with a groove. The right end of the flip shaft 2 is provided with bosses at the top and bottom, and is slidably connected with the groove of the output shaft 5 through the bosses. The outer side of the output shaft 5 is integrally formed with a gear, and is connected to an external drive motor through gear transmission. The inner wall of the sleeve 4 is provided with a spiral groove 41 and a connecting groove 42, and the spiral groove 41 and the connecting groove 42 are interconnected. A ball 21 is rolled on the outer side of the left end of the flip shaft 2, and the ball 21 is rolled in the spiral groove 41 and the connecting groove 42. A spring 6 is connected to the left end of the flip shaft 2, and the spring 6 is located inside the sleeve 4. Open cap 3, place the syringe plunger stopper to be cleaned into cleaning chamber 1, then close cap 3. The external spray system sprays water into cleaning chamber 1, which enters through the cleaning hole to clean the stopper. Water and the cleaned impurities flow out through the cleaning hole. Simultaneously, during the cleaning process, the external drive motor rotates output shaft 5 via gear transmission. Output shaft 5, through tilting shaft 2, rotates cleaning chamber 1, causing the stopper to tumble and shake within cleaning chamber 1, thereby improving cleaning efficiency and quality. While rotating, tilting shaft 2 rotates within spiral groove 41 via ball bearings 21. An axial force is generated in the spiral groove 41, which pulls the flip shaft 2 to move to the left. The spring 6 is deformed by the force. At the same time, the right end of the flip shaft 2 slides on the inner wall of the output shaft 5 through the boss and the groove. When the ball 21 rolls into the connecting groove 42, the spring 6 generates a reaction force to push the flip shaft 2 to quickly reset, thereby driving the cleaning chamber 1 to quickly reset. The cleaning chamber 1 is shaken left and right, so that the flipping and shaking are carried out at the same time, which greatly improves the cleaning efficiency of the rubber stopper. It can thoroughly clean the surface impurities. Moreover, by shaking the cleaning chamber 1, the cleaning hole can be prevented from being blocked, which has a good unblocking effect. Moreover, its overall structure is simple, its manufacturing cost is low, and it can be widely applied to all cleaning equipment.

[0021] A sensing plate is provided at the connection between the spiral groove 41 and the connecting groove 42, and a sensing module is provided inside the sensing plate. The sensing module is electrically connected to the external drive motor and controls the start and stop of the external drive motor by sensing whether the ball 21 is in contact with the sensing plate. When the ball bearing 21 rolls to the connection between the spiral groove 41 and the connecting groove 42, the sensing plate senses the ball bearing 21 and controls the external drive motor to stop running, so that the reaction force of the spring 6 can smoothly push the flipping shaft 2 to reset. Then, when the ball bearing 21 rolls to the right end of the connecting groove 42, the sensing plate at the connection between the spiral groove 41 and the connecting groove 42 contacts, and the sensing module controls the external drive motor to run again, so that the cleaning chamber 1 is continuously shaken left and right during the flipping process, so as to continuously speed up the cleaning process of the rubber stopper, ensure that the shaking process of the rubber stopper is carried out smoothly, and avoid the phenomenon of jamming or stuck between the ball bearing 21 and the spiral groove 41 and the connecting groove 42, thus ensuring smoothness.

[0022] The inner wall of the left end of the sleeve 4 is threaded with a screw plate 43. The spring 6 is located between the right side of the screw plate 43 and the left end of the flip shaft 2. Both the right side of the screw plate 43 and the left end of the flip shaft 2 are provided with arc grooves, and the left and right ends of the spring 6 are respectively embedded in the two arc grooves. When it is necessary to adjust the shaking intensity, the operator only needs to rotate the screw 43 to adjust the preload of the spring 6, so that the strength of the flip shaft 2 when it is reset changes, thereby changing the shaking intensity of the cleaning chamber 1. This can maximize the life of the spring 6 and ensure good shaking intensity at all times. At the same time, the cleaning effect can be enhanced for rubber plugs that are difficult to clean. Furthermore, when the flipping shaft 2 rotates, the two ends of the spring 6 slide within the arc groove, thereby reducing wear on the structure and increasing its service life.

[0023] The right end of the output shaft 5 is threaded with a screw 51, the right end of the flip shaft 2 is provided with a sliding hole, and the left end of the screw 51 is slidably connected in the sliding hole. The inner wall of the sliding hole is integrally formed with an arc protrusion 22, and several top blocks 52 are slidably connected to the outer side of the left end of the screw 51.

[0024] Several top blocks 52 are arranged in a spiral pattern, and after the screw 51 rotates, the outer surface of the top block 52 comes into contact with the inner wall of the arc protrusion 22. During the reciprocating motion of the cleaning chamber 1, the operator can rotate the screw 51 to make the top block 52 rotate around its center until the top block 52 contacts the arc protrusion 22. When the flip shaft 2 moves to the left, the top block 52 and the arc protrusion 22 move relative to each other. When the flip shaft 2 moves to the extreme position to the left, the top block 52 and the arc protrusion 22 disengage. Then, when the flip shaft 2 returns to its original position, the arc protrusion 22 and the top block 52 come into contact and collide with each other, causing the flip shaft 2 to jam when it returns to its original position. This jamming occurs during the left and right shaking, resulting in secondary shaking and vibration, which further increases the speed of cleaning the rubber stopper and further improves the cleaning efficiency. Furthermore, the screw 51 can be freely rotated according to the required cleaning intensity, thereby adjusting the number of contacts between the arc protrusion 22 and the top block 52. This allows for multiple shaking and vibrations during a single left-right movement of the flip shaft 2, significantly increasing the cleaning effect. Alternatively, for cleaning a small number of rubber stoppers, the number of shaking and vibrations can be reduced, ensuring both the cleaning effect and preventing damage from collisions between the rubber stoppers. This high degree of adjustment results in better cleaning of the rubber stoppers.

[0025] The inside of the flip shaft 2 is slidably connected to a push rod 23. The left end of the screw 51 is provided with a hole. The left end of the push rod 23 contacts the right side of the screw disc 43, and the right end is inserted into the hole of the screw 51.

[0026] The cavity is filled with hydraulic oil, and the outer wall has a spiral arrangement of liquid holes. The inner end of the top block 52 is slidably connected to the liquid holes. When adjusting the screw disc 43 to increase the shaking intensity, the right side of the screw disc 43 pushes against the push rod 23 and moves to the right, thereby squeezing the hydraulic oil in the hole. The oil pressure in the hole increases, thereby pushing out the push block 52. When the flip shaft 2 moves left and right repeatedly to shake and vibrate, the vibration intensity is increased, which further increases the cleaning intensity of the cleaning hole and the internal impurities of the rubber plug, greatly increasing the cleaning effect. The intensity of the single left and right movement and the intensity of the multiple shaking and vibration are increased simultaneously, which can clean the rubber plug thoroughly to the greatest extent.

[0027] The edges of the arc-shaped protrusion 22 are rounded. After the top block 52 is ejected, the squeezing force between it and the inner wall of the arc protrusion 22 increases. At this time, during the process of the flipping shaft 2 moving to the left, the force applied to the top block 52 by the hydraulic oil increases the friction between the arc protrusion 22 and the top block 52, thereby slowing down the speed when the cleaning chamber 1 moves to the left, and only retaining the shaking intensity when resetting to the right. This avoids the bidirectional shaking causing the rubber stopper to collide and roll back and forth inside the cleaning chamber 1, affecting the surface quality, and plays a role in ensuring the production quality of the rubber stopper.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tilting syringe plunger cleaning device, comprising a cleaning chamber (1) and a tilting shaft (2), characterized in that: The flipping shaft (2) is inserted in the middle of the cleaning chamber (1) and is integrally formed with the cleaning chamber (1); Both ends of the cleaning chamber (1) are threaded with caps (3), and several cleaning holes are provided on the surface of the caps (3) and the upper and lower sides of the cleaning chamber (1). The left end of the flip shaft (2) is rotatably connected with a sleeve (4), and the right end is provided with an output shaft (5). The inner wall of the output shaft (5) is provided with a groove. The right end of the flip shaft (2) is provided with bosses at the top and bottom, and is slidably connected with the groove of the output shaft (5) through the bosses. The outer side of the output shaft (5) is integrally formed with a gear, and is connected to an external drive motor through gear transmission. The inner wall of the sleeve (4) is provided with a spiral groove (41) and a connecting groove (42), and the spiral groove (41) and the connecting groove (42) are interconnected. A ball (21) is rolled on the outer side of the left end of the flip shaft (2), and the ball (21) is rolled in the spiral groove (41) and the connecting groove (42). A spring (6) is connected to the left end of the flip shaft (2), and the spring (6) is located inside the sleeve (4). A screw (51) is threaded to the right end of the output shaft (5). A sliding hole is opened at the right end of the flip shaft (2), and the left end of the screw (51) is slidably connected in the sliding hole. An arc protrusion (22) is integrally formed on the inner wall of the sliding hole. The screw ( Several top blocks (52) are slidably connected to the outer side of the left end of the screw (51). The top blocks (52) are arranged in a spiral pattern. After the screw (51) rotates, the outer surface of the top block (52) contacts the inner wall of the arc protrusion (22). The inside of the flip shaft (2) is slidably connected to the top rod (23). The left end of the screw (51) is provided with a hole. The inner wall of the left end of the sleeve (4) is threaded with a screw disc (43). The left end of the top rod (23) contacts the right side of the screw disc (43). The right end is inserted into the hole of the screw (51). The hole is filled with hydraulic oil. The outer wall is arranged in a spiral pattern with liquid holes. The inner end of the top block (52) is slidably connected to the liquid holes.

2. The device for cleaning rubber stoppers of a flip-type syringe plunger according to claim 1, characterized in that: A sensing plate is provided at the connection between the spiral groove (41) and the connecting groove (42), and a sensing module is provided inside the sensing plate. The sensing module is electrically connected to the external drive motor, and controls the start and stop of the external drive motor by sensing whether the ball (21) is in contact with the sensing plate.

3. The device for cleaning rubber stoppers of a flip-type syringe plunger according to claim 2, characterized in that: The spring (6) is located between the right side of the screw disk (43) and the left end of the flip shaft (2). Both the right side of the screw disk (43) and the left end of the flip shaft (2) are provided with arc grooves, and the left and right ends of the spring (6) are respectively embedded in the two arc grooves.

4. The device for cleaning rubber stoppers of a flip-type syringe plunger according to claim 3, characterized in that: The edges of the arc protrusion (22) are rounded.

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