Injection pump push-pull box

Abstract

The invention discloses an injection pump push-pull box which comprises a box body assembly and a locking device. The box body assembly comprises a first box body and a second box body, and the second box body is movably connected to the first box body; the locking device comprises a driving mechanism, a locking assembly and a clamping assembly, the driving mechanism is movably connected to the first box body, the locking assembly is arranged on the driving mechanism, the locking assembly is connected to the first box body, and the clamping assembly is arranged on the second box body; the driving mechanism has a first driving state and a second driving state, in the first driving state, the driving mechanism drives the locking assembly and the clamping assembly to be locked so that the first box body and the second box body can be locked, and in the second driving state, the driving mechanism drives the locking assembly and the clamping assembly to be separated so that the first box body and the second box body can be unlocked. The invention aims to improve the operation safety and stability.

Description

Technical Field

[0001] The invention relates to the field of injection pumps, in particular to a push-pull box for an injection pump. Background Art

[0002] In the existing syringe pump push-pull box, the patient can take out the syringe from the push-pull box to inject on his own. The push-pull box does not play a role of mandatory protection, thus posing a serious safety hazard. Summary of the Invention

[0003] The main purpose of the present invention is to provide a syringe pump push-pull box, aiming to improve operational safety and stability.

[0004] To achieve the above-mentioned object, the present invention provides a syringe pump push-pull box, comprising:

[0005] The box body assembly includes a first box body and a second box body, wherein the second box body is movably connected to the first box body;

[0006] a locking device, the locking device comprising a driving mechanism, a locking assembly, and a clamping assembly, the driving mechanism being movably connected to the first box body, the driving mechanism being provided with the locking assembly, the locking assembly being connected to the first box body, and the clamping assembly being provided on the second box body; and

[0007] The driving mechanism has a first driving state and a second driving state. In the first driving state, the driving mechanism drives the locking assembly and the clamping assembly to lock, so that the first box body and the second box body are locked. In the second driving state, the driving mechanism drives the locking assembly and the clamping assembly to separate, so that the first box body and the second box body are unlocked.

[0008] In one embodiment, the driving mechanism includes a guide member and a transmission assembly, and the guide member has a first driving state and a second driving state for driving cooperation with the transmission assembly. In the first driving state, the guide member moves in a first direction to drive the transmission assembly to move, so as to drive the locking assembly and the clamping assembly to lock. In the second driving state, the guide member moves in a second direction to drive the transmission assembly to move, so as to drive the locking assembly and the clamping assembly to separate. The first direction is opposite to the second direction.

[0009] In one embodiment, the driving mechanism further includes a stop assembly, which is disposed between the guide member and the transmission assembly and is used to limit the movement of the transmission assembly.

[0010] In one embodiment, the stop assembly includes an elastic member and a stop member, and the elastic member is elastically and retractably arranged between the stop member and the transmission assembly;

[0011] The guide member has a guide inclined surface and a transmission curved surface. The guide inclined surface is used to guide the stop member to move along a predetermined trajectory, and the transmission curved surface is used to cooperate with the transmission component to drive the transmission component to switch between the first driving state and the second driving state.

[0012] In one embodiment, the transmission assembly includes a first transmission mechanism, a second transmission mechanism and a third transmission mechanism, the first transmission mechanism is connected to the first box body, the first transmission mechanism is coordinated with the transmission surface, the first transmission mechanism, the second transmission mechanism and the third transmission mechanism are sequentially connected in transmission, and the locking assembly is connected to the third transmission mechanism.

[0013] In one embodiment, the first transmission mechanism includes two oppositely arranged support frames and a top plate and a base arranged between the two support frames, the top plate is slidably installed between the two second support frames, the top plate is in transmission cooperation with the transmission curved surface, the second transmission mechanism is connected to the top plate, and the base is connected to the first box body.

[0014] In one embodiment, the second transmission mechanism includes two oppositely disposed connecting rods and two oppositely disposed connecting members, one end of the two connecting rods respectively engages with the top plate, and the other end of the two connecting rods is respectively connected to the two connecting members, the two connecting rods correspond to the two connecting members in a one-to-one manner, and the two connecting members are respectively connected to the third transmission mechanism in a transmission manner;

[0015] The elastic member includes two reset springs arranged opposite to each other, the two connecting frames are respectively connected to one end of the two reset springs, and the other ends of the two reset springs are respectively connected to two sides of the stop member.

[0016] In one embodiment, the locking assembly includes a first pawl and a second pawl, and the first pawl and the second pawl are respectively transmission-connected to the third transmission mechanism;

[0017] The clamping assembly includes a first clamping member and a second clamping member, the first clamping member is provided with a first ratchet, the second clamping member is provided with a second ratchet, the first pawl is locked or separated with the first ratchet, and the second pawl is locked or separated with the second ratchet.

[0018] In one embodiment, the third transmission mechanism includes two oppositely arranged rotating shafts, one end of the two rotating shafts is transmission-connected to the two connecting members, and the other end of the two rotating shafts is transmission-connected to the first pawl and the second pawl respectively.

[0019] In one embodiment, the locking device further comprises a rotary lock core having a keyhole for cooperating with an external key, the rotary lock core being disposed on the first box body, and a rotation axis of the rotary lock core being coaxially disposed with the guide member;

[0020] When the rotary lock core rotates to a first rotation angle, the drive assembly is in the first driving state; when the rotary lock core rotates to a second rotation angle, the drive assembly is in the second driving state.

[0021] The syringe pump push-pull box disclosed in the present invention realizes reliable locking and unlocking between the first box body and the second box body through a locking device, thereby ensuring that the syringe pump push-pull box has the following effects during use: the driving mechanism can accurately switch between the first driving state and the second driving state, ensuring the accuracy of the locking and unlocking operations. The cooperation between the locking component and the clamping component can ensure that the syringe piston is firmly clamped to prevent sliding or loosening during the liquid transmission process. Through the design of the locking device, it is ensured that the position between the first box body and the second box body is fixed in the locked state, preventing any unnecessary movement from affecting the infusion of the syringe pump and ensuring that unauthorized personnel cannot easily perform locking and unlocking operations, thereby reducing safety hazards. In the unlocked state, the second box body can move freely, which is convenient for the user to adjust the position of the syringe or replace the syringe. The user can complete the locking and unlocking operations by simply controlling the state switching of the driving mechanism. The operation is simple and intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a push-pull box for a syringe and a syringe pump provided by the present invention;

[0024] Figure 2 A schematic structural diagram of an embodiment of a push-pull box for a syringe pump provided by the present invention;

[0025] Figure 3 A partial structural diagram of an embodiment of a syringe pump push-pull box provided by the present invention;

[0026] Figure 4 A partial structural diagram of another embodiment of the syringe pump push-pull box provided by the present invention;

[0027] Figure 5A partial structural diagram of another embodiment of the syringe pump push-pull box provided by the present invention;

[0028] Figure 6 A partial structural diagram of another embodiment of the syringe pump push-pull box provided by the present invention;

[0029] Figure 7 This is a structural schematic diagram of an embodiment of a transmission assembly provided by the present invention.

[0030] Description of Figure Numbers:

[0031] 100, syringe pump push-pull box; 200, syringe;

[0032] 10. Box body assembly; 11. First box body; 12. Second box body; 20. Locking device; 21. Driving mechanism; 22. Locking assembly; 221. First pawl; 222. Second pawl; 23. Clamping assembly; 231. First clamping member; 232. Second clamping member; 233. First ratchet; 234. Second ratchet; 24. Guide member; 241. Guide slope; 242. Transmission surface; 25. Transmission assembly; 251. First transmission mechanism; 2511. Support frame; 2512. Top plate; 2513. Base; 252. Second transmission mechanism; 2521. Connecting rod; 2522. Connecting member; 253. Third transmission mechanism; 2531. Rotating shaft; 26. Stop assembly; 261. Elastic member; 262. Stop member.

[0033] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present invention proposes a push-pull box for an injection pump. After the injection pump is installed on the push-pull box, the push-pull box is locked by a locking device, thereby preventing the patient from taking out the syringe from the push-pull box for self-injection. Therefore, the push-pull box of the present invention can play a role of compulsory protection, thereby improving the safety of use and operational stability.

[0038] Please refer to Figures 1 to 7 In one embodiment of the present invention, the syringe pump push-pull box includes:

[0039] The box assembly 10 includes a first box body 11 and a second box body 12, wherein the second box body 12 is movably connected to the first box body 11;

[0040] A locking device 20, comprising a drive mechanism 21, a locking assembly 22, and a clamping assembly 23, wherein the drive mechanism 21 is movably connected to the first box body 11, the drive mechanism 21 is provided with the locking assembly 22, the locking assembly 22 is connected to the first box body 11, and the clamping assembly 23 is provided on the second box body 12; and

[0041] The driving mechanism 21 has a first driving state and a second driving state. In the first driving state, the driving mechanism 21 drives the locking assembly 22 and the clamping assembly 23 to lock the first box body 11 and the second box body 12. In the second driving state, the driving mechanism 21 drives the locking assembly 22 and the clamping assembly 23 to separate to unlock the first box body 11 and the second box body 12.

[0042] The present invention is a push-pull cassette design for a syringe pump. The syringe pump push-pull cassette 100 is used to clamp the piston of a syringe 200 and transfer liquid by pushing the piston. Its main feature is that a locking device is used to lock and unlock the syringe pump push-pull cassette 100 (composed of a first cassette body 11 and a second cassette body 12). The solution includes a cassette assembly 10, which contains a first cassette body 11 and a second cassette body 12. The second cassette body can move relative to the first cassette body to adapt to different usage requirements. It can be understood that the clamping assembly 23 is used to clamp the piston of the syringe 200. When the driving mechanism 21 drives the locking assembly 22 to move to lock with the clamping assembly 23, the first box body 11 and the second mixing body 12 are locked at this time. Then, in the locked state, the piston of the syringe 200 is clamped by the clamping assembly 23. At this time, the patient cannot take the syringe 200 out of the push-pull box 100 for self-injection. The push-pull box 100 plays a role of forced protection, thereby preventing the patient from taking out the syringe 200 and injecting himself, thereby avoiding serious safety hazards.

[0043] In the initial state, the second housing 12 is free to move relative to the first housing 11. The locking assembly 22 and the clamping assembly 23 are separated, meaning no locking force is applied. When the second housing 12 needs to be secured to the first housing 11, the drive mechanism 21 enters the first drive state. In this state, the drive mechanism 21 begins to drive the locking assembly 22 toward the clamping assembly 23 until the locking assembly 22 contacts and locks the clamping assembly 23. This process secures the relative position between the first and second housings 11, 12, preventing unwanted movement or slipping. At this point, the syringe pump push-pull cartridge 100 reaches the locked state. In this locked state, the piston of the syringe 200 is clamped by the clamping assembly 23. When the position of the second housing 12 needs to be adjusted or the syringe removed, the drive mechanism 21 switches to the second drive state. In this state, the drive mechanism 21 drives the locking assembly 22 to gradually move away from the clamping assembly 23. The locking assembly 22 completely separates from the clamping assembly 23, returning to the initial unlocked state. At this time, the first box body 11 and the second box body 12 move relative to each other, which facilitates operations such as adjusting or replacing the syringe 200.

[0044] Please refer to Figures 1 to 7In one embodiment of the present invention, the driving mechanism 21 includes a guide member 24 and a transmission assembly 25. The guide member 24 has a first driving state and a second driving state for driving cooperation with the transmission assembly 25. In the first driving state, the guide member 24 moves in a first direction to drive the transmission assembly 25 to move, so as to drive the locking assembly 22 and the clamping assembly 23 to be locked. In the second driving state, the guide member 24 moves in a second direction to drive the transmission assembly 25 to move, so as to drive the locking assembly 22 to separate from the clamping assembly 23. The first direction is opposite to the second direction.

[0045] The guide member 24's different movement directions (first and second directions) drive the transmission assembly 25, thereby controlling the state transition between the locking assembly 22 and the clamping assembly 23. Specifically, when the guide member 24 moves in the first direction, it locks the locking assembly 22 and the clamping assembly 23; when the guide member 24 moves in the opposite second direction, it separates the locking assembly 22 and the clamping assembly 23. Complex functional transitions can be achieved through simple movement of the guide member 24, improving the safety and reliability of the device while also facilitating maintenance and operation. It should be understood that the first direction refers to the linear movement of the guide member 24 in a specific direction. In this case, the movement of the guide member 24 causes the transmission assembly 25 to push the locking assembly 22 toward the clamping assembly 23 until the two are locked. This action is typically used to achieve a locking function, such as ensuring that the push-pull cartridge in a syringe pump remains stable and prevents unnecessary movement during operation. The second direction is the exact opposite of the first direction. When the guide member 24 moves in the second direction, it causes the transmission assembly 25 to pull or release the locking assembly 22, moving it away from the clamping assembly 23, thereby releasing the locked state. This step allows the user to open or adjust the position of the push-pull box, such as replacing a syringe or adjusting the device settings. It is understandable that in the case of electric drive, forward rotation of the motor (clockwise rotation) will cause the guide member 24 to move in the first direction, while reverse rotation (counterclockwise rotation) will cause the guide member 24 to move in the second direction. If it is manually operated, the moving direction of the guide member 24 may be changed by a mechanism such as a knob or lever. This solution realizes the function of locking or separating the locking assembly 22 and the clamping assembly 23 by changing the moving direction of the guide member 24.

[0046] Please refer to Figures 1 to 7 In one embodiment of the present invention, the driving mechanism 21 further includes a stop assembly 26 , which is disposed between the guide member 24 and the transmission assembly 25 and is used to limit the movement of the transmission assembly 25 .

[0047] The drive mechanism 21 further includes a stop assembly 26, which is located between the guide member 24 and the transmission assembly 25 and is used to limit the movement of the transmission assembly 25. The main function of the stop assembly 26 is to limit the range of motion of the transmission assembly 25. When the guide member 24 moves along the first direction (locking direction), it ensures that the locking assembly 22 accurately reaches the position locked with the clamping assembly 23, preventing the transmission assembly 25 from exceeding the predetermined position due to excessive advancement of the guide member 24, causing unnecessary wear or damage. When the guide member 24 moves along the second direction (unlocking direction), the stop assembly 26 plays a role again, but now it is to ensure that the transmission assembly 25 can accurately separate the locking assembly 22 from the clamping assembly 23. The stop assembly 26 limits the maximum retreat distance of the transmission assembly 25, avoiding system imbalance or other potential problems caused by excessive retraction. As part of the drive mechanism 21, the stop assembly 26 increases the control accuracy and safety of the syringe pump push-pull box 100, ensuring that the locking or unlocking process between the locking assembly 22 and the clamping assembly 23 is more stable and reliable.

[0048] Please refer to Figures 1 to 7 In one embodiment of the present invention, the stop assembly 26 includes an elastic member 261 and a stop member 262 , and the elastic member 261 is elastically and retractably disposed between the stop member 262 and the transmission assembly 25 ;

[0049] The guide member 24 has a guide inclined surface 241 and a transmission curved surface 242. The guide inclined surface 241 is used to guide the stop member 262 to move along a predetermined trajectory, and the transmission curved surface 242 is used to cooperate with the transmission assembly 25 to drive the transmission assembly 25 to switch between the first driving state and the second driving state.

[0050] The guide ramp 241 is an inclined structure on the surface of the guide member 24. Due to the design of the ramp, the forward movement of the guide member 24 causes the stop member 262 to deflect outward along a predetermined trajectory, adjusting the relative position between the stop member 262 and the transmission assembly 25 and preparing for subsequent power transmission. The transmission curved surface 242 is another key structure on the guide member 24. It directly contacts the transmission assembly 25 and transmits force, thereby driving the transmission assembly 25 in motion. Its specific functions are as follows: Forward propulsion (first driving state): When the guide member 24 moves in the first direction, the entire locking device 20 begins the locking operation phase. At this point, the elastic member 261 is in a natural state, that is, not compressed or stretched. The guide ramp 241 on the guide member 24 first contacts the stop member 262. Due to the design of the ramp, the forward movement of the guide member 24 causes the stop member 262 to deflect outward along a predetermined trajectory. This deflection adjusts the relative position between the stop member 262 and the transmission assembly 25, preparing for subsequent power transmission. Next, the transmission curved surface 242 on the guide member 24 gradually approaches and contacts the transmission assembly 25. The transmission curved surface 242 typically has a certain inclination angle or curved profile, enabling it to exert a forward thrust on the transmission assembly 25 during movement. This thrust is further transmitted to the locking assembly 22 via the transmission assembly 25, driving the locking assembly 22 toward the clamping assembly 23. At this point, the elastic member 261, while not yet compressed, is already in a standby state. One end of the elastic member 261 is fixed to the stop member 262, while the other end abuts the transmission assembly 25. As the transmission assembly 25 moves forward, propelled by the transmission curved surface 242, the elastic member 261 begins to feel a slight preload from the transmission assembly 25, but remains essentially undeformed. As the locking assembly 22 approaches the clamping assembly 23, contact pressure begins to build up between the two. It is understood that the rebound tendency of the elastic member 261 continues to provide a slight pressure after locking is completed, helping to maintain a stable connection between the locking assembly 22 and the clamping assembly 23 and preventing loosening due to vibration or external forces. Reverse pull (second drive state): Conversely, when the guide member 24 moves in the second direction (i.e., the direction opposite to the first direction), the guide member 24 moves in the opposite direction, at which point the elastic member 261 begins to function. As the guide member 24 retracts, the elastic member 261 is now in a tensioned state, and the transmission surface 242 gradually reduces the pressure on the transmission assembly 25, helping the transmission assembly 25 to quickly return to its initial position, thereby separating the locking assembly 22 from the clamping assembly 23 and completing the unlocking action. Throughout this process, the transmission surface 242 is responsible for converting the linear motion of the guide member 24 into a driving force for the transmission assembly 25, while the elastic member 261 plays an auxiliary role in buffering, protecting, and enhancing locking stability throughout the locking action. The specific shape and inclination angle of the transmission surface 242 determine how effectively it converts the linear motion of the guide member 24 into linear displacement of the transmission assembly 25.Typically, such a curved surface has a certain slope or curve to provide different contact points at different positions, thereby optimizing the efficiency of force transmission. In the present application, a protrusion is further provided on the stopper 262, and a groove is provided on the corresponding guide slope. The protrusion slides on the guide slope to the groove to limit the movement distance of the stopper 262 on the guide slope 241. Furthermore, in this embodiment, a spring is provided between the stopper 262 and the first box body 11. After the spring is provided, when the guide member 24 moves in the opposite direction and the driving force is removed, the spring can provide a restoring force to return the stopper 262 to its original position. This automatic reset function avoids manual intervention or the design of an additional reset structure, thereby improving the automation level of the system.

[0051] Please refer to Figures 1 to 7 In one embodiment of the present invention, the transmission assembly 25 includes a first transmission mechanism 251, a second transmission mechanism 252 and a third transmission mechanism 253. The first transmission mechanism 251 is connected to the first box body 11, and the first transmission mechanism 251 is in transmission cooperation with the transmission curved surface 242. The first transmission mechanism 251, the second transmission mechanism 252 and the third transmission mechanism 253 are sequentially connected in transmission, and the locking assembly 22 is connected to the third transmission mechanism 253.

[0052] The locking and unlocking functions of the locking device 20 are achieved through a multi-level drive assembly 24. The transmission assembly 25 comprises a first transmission mechanism 251, a second transmission mechanism 252, and a third transmission mechanism 253. These mechanisms are connected in sequence and, through the guide member 24, achieve the locking and unlocking functions of the locking device. The first transmission mechanism 251 is connected to the first housing 11 and directly connected to the transmission surface 242 for driving. The second transmission mechanism 252 is connected to the first transmission mechanism 251 and is responsible for transmitting force from the first direction of motion to the third transmission mechanism 253. The third transmission mechanism 253 ultimately receives power from the first two mechanisms and is equipped with the locking assembly 22. This allows power transmitted to the third transmission mechanism 253 to directly act on the locking assembly 22, completing the locking or unlocking operation. The multi-level motion direction mechanism allows for independent adjustment of each step, improving the response speed and accuracy of the overall system. By optimizing the power transmission path between each level, energy loss is reduced and work efficiency is improved. If a problem occurs at a level, only that part needs to be replaced or repaired, without completely disassembling the entire system. Specifically, when locking is required, the guide member 24 moves in the first direction, and the transmission curved surface 242 thereon pushes the first transmission mechanism 251 forward. The first transmission mechanism 251 transmits power to the second transmission mechanism 252, and the direction of movement may be changed or the stroke may be amplified during this process. The second transmission mechanism 252 then transmits power to the third transmission mechanism 253, and the third transmission mechanism 253 pushes the locking assembly 22 to move toward the clamping assembly 23. When the locking assembly 22 is locked with the clamping assembly 23, the relative position between the first box body 11 and the second box body 12 can be fixed, and the piston of the syringe can be firmly clamped. In the locked state, the syringe pump push-pull box applies force to the piston of the syringe 200 through the clamping assembly 23, pushing the piston forward to achieve liquid transmission. Due to the action of the locking device 20, the first box body 11 and the second box body 12 remain fixed, preventing any unnecessary movement from affecting the accuracy of liquid transmission. Switch back to the unlocked state: When it is necessary to stop liquid transmission or adjust the position of the syringe 200, the guide member 24 moves in the second direction (reverse), and the transmission surface 242 pulls or releases the first transmission mechanism 251. The power is transmitted in turn through the second transmission mechanism 252 and the third transmission mechanism 253. The third transmission mechanism 253 drives the locking assembly 22 away from the clamping assembly 23. In some designs, the elastic member will assist the transmission assembly in resetting. Finally, the locking assembly 22 is completely separated from the clamping assembly 23, and the first box body 11 and the second box body 12 are unlocked. The first box body 11 and the second box body 12 are restored to a movable state, and the user can safely adjust the position of the syringe or perform other operations.

[0053] Please refer to Figures 1 to 7In one embodiment of the present invention, the first transmission mechanism 251 includes two oppositely arranged support frames 2511 and a top plate 2512 and a base 2513 arranged between the two support frames 2511. The top plate 2512 is slidably installed between the two second support frames 2511. The top plate 2512 is in transmission cooperation with the transmission curved surface 242. The second transmission mechanism 252 is connected to the top plate 2511, and the base 2513 is connected to the first box body 11.

[0054] The first-stage transmission structure in the syringe pump push-pull cartridge locking device utilizes two opposing support frames 2511 as the framework for the entire first transmission mechanism 251. A slidable top plate 2512 is positioned between the two support frames, serving as a key component that contacts the transmission curved surface 242 on the guide member 24. A base 2513 is fixed to the first cartridge body 11, providing connection and positioning. The second transmission mechanism 252 is mounted on the top plate 2512, thereby achieving step-by-step power transmission from the guide member 24 to subsequent transmission components. The dual-support frame + top plate + base combination provides excellent mechanical stability and deformation resistance. The controllable sliding path of the top plate 2512 between the support frames 2511 ensures precise transmission. The first transmission mechanism 251 is a standalone module, making it easy to manufacture, assemble, and maintain. It is understood that the connection between the top plate 2512 and the second transmission mechanism 252 can be achieved by machining matching keyways in the top plate 2512 and inserting a key, ensuring precise positioning and preventing relative sliding. The second transmission mechanism 252 may also be fixed to the top plate 2512 by bolts or screws.

[0055] Please refer to Figures 1 to 7 In one embodiment of the present invention, the second transmission mechanism 252 includes two oppositely disposed connecting rods 2521 and two oppositely disposed connecting members 2522. One end of the two connecting rods 2521 is respectively in transmission engagement with the top plate 2511, and the other end of the two connecting rods 2521 is respectively in transmission connection with the two connecting members 2522. The two connecting rods 2521 and the two connecting members 2522 correspond one to one, and the two connecting members 2522 are respectively in transmission connection with the third transmission mechanism 253.

[0056] The elastic member 261 includes two reset springs arranged opposite to each other. The two connecting members 2522 are respectively connected to one end of the two reset springs, and the other ends of the two reset springs are respectively connected to two sides of the stop member 262.

[0057] The second-stage transmission structure in the syringe pump's push-pull cartridge locking device is designed to consist of two opposing connecting rods 2521 and two corresponding connecting members 2522. One end of the connecting rod 2521 is connected to the top plate 2512 of the first transmission mechanism 251, while the other end transmits power to the third transmission mechanism 253 via the connecting member 2522. Furthermore, the elastic member 261, in the form of two return springs, is mounted between the connecting member 2522 and the stop member 262. The presence of the return springs absorbs shock and vibration, reduces wear and fatigue between mechanical components, and extends the life of the device. During power transmission, the return springs also act as a buffer, preventing damage or failure of components caused by sudden force. By properly designing the spring constant of the return springs, the connecting member 2422 is guaranteed to return accurately to its predetermined position each time it is reset, ensuring the accuracy of subsequent operations. The design of the two connecting rods 2521 and two connecting members 2522 ensures more balanced power transmission, preventing jamming or wear caused by unbalanced loading. The second transmission mechanism is a standalone module, making it easy to manufacture, assemble, and maintain. The connecting rod's angle, stroke, and spring stiffness can be adjusted to suit different syringe pump models.

[0058] Please refer to Figures 1 to 7 In one embodiment of the present invention, the locking assembly 22 includes a first pawl 221 and a second pawl 222 , and the first pawl 221 and the second pawl 222 are respectively connected to the third transmission mechanism 253 ;

[0059] The clamping assembly 23 includes a first clamping member 231 and a second clamping member 232. The first clamping member 231 is provided with a first ratchet 233, and the second clamping member 232 is provided with a second ratchet 234. The first pawl 221 is locked or separated with the first ratchet 233, and the second pawl 222 is locked or separated with the second ratchet 234.

[0060] The clamping assembly 23 comprises a first clamping member 231 and a second clamping member 232, which are used to directly clamp the plunger of the syringe 200, ensuring that the plunger does not slip or loosen during liquid transfer. The first clamping member 231 is provided with a first ratchet 233, and the second clamping member 232 is provided with a second ratchet 234. By integrating the ratchets into the clamping members, additional mechanical components are reduced, the overall structure is simplified, and the reliability and maintenance ease of the system are improved. The locking assembly 22 comprises a first pawl 221 and a second pawl 222, which are respectively used to lock and release with their corresponding ratchets to achieve locking and unlocking functions. The third transmission mechanism 253 acts as an intermediate transmission component, transmitting power from the connecting member 2422 to the pawls, thereby achieving locking and unlocking. This solution provides a one-way locking function through the cooperation of the pawl and ratchet, preventing reverse movement and ensuring stability in the locked state. The combination of the pawl and ratchet achieves precise locking control, and the clamping member ensures secure clamping of the syringe plunger.

[0061] Please refer to Figures 1 to 7 In one embodiment of the present invention, the third transmission mechanism 253 includes two oppositely arranged rotating shafts 2531, one end of the two rotating shafts 2531 is transmission-connected to the two connecting members 2522, and the other end of the two rotating shafts 2531 is transmission-connected to the first pawl 221 and the second pawl 222 respectively.

[0062] The third transmission mechanism 253, as the last link in the entire transmission chain, has the main task of receiving power from the second transmission mechanism 252 and converting linear motion into rotational motion (or vice versa) in order to drive the pawl and other locking components, achieve precise coordination between the locking assembly 22 and the clamping assembly 23, and ensure reliable locking or unlocking operations. The two rotating shafts drive the two pawls respectively to ensure the balance and stability of the locking and unlocking process. The pawl design can provide precise locking and unlocking actions, ensuring the safety and reliability of the push-pull box. As an independent module, the third transmission mechanism 253 is easy to manufacture, assemble and maintain later.

[0063] Please refer to Figures 1 to 7 In one embodiment of the present invention, the locking device further comprises a rotary lock core having a keyhole for cooperating with an external key, the rotary lock core being disposed on the first box body 11, and the rotation axis of the rotary lock core being coaxially arranged with the guide member 24;

[0064] When the rotary lock core rotates to a first rotation angle, the drive assembly is in the first driving state; when the rotary lock core rotates to a second rotation angle, the drive assembly is in the second driving state.

[0065] The rotary lock cylinder, located within or on the surface of the first housing 11, serves as the manual control core of the entire locking device. It features a standard keyhole structure, allowing rotational operation with a dedicated key. The lock cylinder typically contains multiple sets of pins to ensure that only a specific key can actuate its rotation. The rotation axis of the rotary lock cylinder aligns with the direction of motion of the guide member 24. In other words, its center of rotation is coaxial with the path of movement of the guide member 24. This coaxial design facilitates stable power transmission and compact spatial layout. It will be appreciated that linkage mechanisms (such as gears, connecting rods, cams, etc.) are typically provided within or around the rotary lock cylinder to convert its rotational motion into linear displacement of the guide member 24. When the rotary lock cylinder is rotated to different angles, these linkage mechanisms drive the guide member 24 in either the first or second direction, thereby activating the drive assembly to enter the corresponding drive state. The rotation angle of the rotary lock cylinder determines the state of the drive mechanism 21, thereby controlling the locking or disengagement of the locking assembly 22 and the clamping assembly 23. This design not only enhances the safety and controllability of the syringe pump push-pull cartridge operation.

[0066] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A push-pull box for an injection pump, characterized in that: include: The box body assembly includes a first box body and a second box body, wherein the second box body is movably connected to the first box body; A locking device, comprising a driving mechanism, a locking assembly, and a clamping assembly, wherein the driving mechanism is movably connected to the first box body, the driving mechanism is provided with the locking assembly, the locking assembly is connected to the first box body, and the clamping assembly is provided on the second box body; as well as The driving mechanism has a first driving state and a second driving state. In the first driving state, the driving mechanism drives the locking assembly and the clamping assembly to lock, so that the first box body and the second box body are locked. In the second driving state, the driving mechanism drives the locking assembly and the clamping assembly to separate, so that the first box body and the second box body are unlocked.

2. The syringe pump push-pull box according to claim 1, characterized in that: The driving mechanism includes a guide member and a transmission assembly, and the guide member has a first driving state and a second driving state that cooperate with the transmission assembly. In the first driving state, the guide member moves in a first direction to drive the transmission assembly to move, so as to drive the locking assembly and the clamping assembly to lock. In the second driving state, the guide member moves in a second direction to drive the transmission assembly to move, so as to drive the locking assembly and the clamping assembly to separate. The first direction is opposite to the second direction.

3. The syringe pump push-pull box according to claim 2, characterized in that: The driving mechanism further includes a stop assembly, which is arranged between the guide member and the transmission assembly and is used to limit the movement of the transmission assembly.

4. The syringe pump push-pull box according to claim 3, characterized in that: The stop assembly includes an elastic member and a stop member, wherein the elastic member is elastically extendable and arranged between the stop member and the transmission assembly; The guide member has a guide inclined surface and a transmission curved surface. The guide inclined surface is used to guide the stop member to move along a predetermined trajectory, and the transmission curved surface is used to cooperate with the transmission component to drive the transmission component to switch between the first driving state and the second driving state.

5. The syringe pump push-pull box according to claim 4, characterized in that: The transmission assembly includes a first transmission mechanism, a second transmission mechanism and a third transmission mechanism. The first transmission mechanism is connected to the first box body, and the first transmission mechanism is in transmission cooperation with the transmission curved surface. The first transmission mechanism, the second transmission mechanism and the third transmission mechanism are sequentially connected in transmission, and the locking assembly is connected to the third transmission mechanism.

6. The push-pull box for the syringe pump according to claim 5, characterized in that: The first transmission mechanism includes two oppositely arranged support frames and a top plate and a base arranged between the two support frames. The top plate can be slidably installed between the two second support frames. The top plate is in transmission cooperation with the transmission curved surface. The second transmission mechanism is connected to the top plate, and the base is connected to the first box body.

7. The syringe pump push-pull box according to claim 6, characterized in that: The second transmission mechanism includes two oppositely arranged connecting rods and two oppositely arranged connecting members, one end of the two connecting rods is respectively in transmission engagement with the top plate, and the other end of the two connecting rods is respectively in transmission connection with the two connecting members, the two connecting rods and the two connecting members correspond one to one, and the two connecting members are respectively in transmission connection with the third transmission mechanism; The elastic member includes two reset springs arranged opposite to each other, the two connecting frames are respectively connected to one end of the two reset springs, and the other ends of the two reset springs are respectively connected to two sides of the stop member.

8. The push-pull box for the syringe pump according to claim 7, characterized in that: The locking assembly includes a first pawl and a second pawl, wherein the first pawl and the second pawl are respectively connected to the third transmission mechanism in a transmission manner; The clamping assembly includes a first clamping member and a second clamping member, the first clamping member is provided with a first ratchet, the second clamping member is provided with a second ratchet, the first pawl is locked or separated with the first ratchet, and the second pawl is locked or separated with the second ratchet.

9. The push-pull box for the syringe pump according to claim 8, characterized in that: The third transmission mechanism includes two rotating shafts arranged opposite to each other, one end of the two rotating shafts is transmission-connected to the two connecting members, and the other end of the two rotating shafts is transmission-connected to the first pawl and the second pawl respectively.

10. The push-pull box for the syringe pump according to claim 2, characterized in that: The locking device further comprises a rotary lock core having a keyhole for cooperating with an external key, the rotary lock core being arranged on the first box body, and a rotation axis of the rotary lock core being coaxially arranged with the guide member; When the rotary lock core rotates to a first rotation angle, the drive assembly is in the first driving state; when the rotary lock core rotates to a second rotation angle, the drive assembly is in the second driving state.

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