An automatic injection device for a syringe

Abstract

The present invention provides an automatic injection device for a syringe, which includes a bottom plate and a driving mechanism. An injection cylinder is installed on the top of the bottom plate, and a rubber piston is installed inside the injection cylinder. A connection groove is provided at the center of one end of the rubber piston, and a quick-release head is connected in the connection groove. The driving mechanism includes a first cylinder and a second cylinder which are connected to each other. A lead screw is installed inside the second cylinder, and a ball nut is installed on the lead screw and is fixedly connected to one end of the second cylinder. An installation port is provided at one end of the first cylinder, and a first driving motor is installed inside the installation port, and the output shaft of the first driving motor is connected to the quick-release head. By using the driving mechanism in cooperation with the rubber piston and the injection cylinder, the present invention can realize rapid automatic extraction and injection of drugs, with relatively high convenience in use. At the same time, by controlling the rotation amount of the second driving motor, the stroke of the rubber piston can also be controlled to ensure high precision during drug extraction and injection.

Description

Technical Field

[0001] The present invention belongs to the technical field of syringes, and more specifically, particularly relates to an automatic injection device for a syringe. Background Art

[0002] Currently, in clinical practice, when preparing medicine, a syringe is basically held by hand to aspirate the liquid medicine from the medicine bottle and then injected into the infusion bottle. Since the medicine bottles are all sealed bottles, the resistance during aspiration is relatively large, which is extremely laborious, and the aspiration process is relatively slow. At the same time, the amount of medicine during aspiration or injection can only be judged by visually observing the scale line of the syringe, and the accuracy of the amount of medicine cannot be guaranteed, which will have a certain impact on the therapeutic effect of the patient. In addition, holding the syringe by hand is not conducive to supervision, and there is a situation of taking shortcuts, resulting in repeated use, which increases the chance of secondary pollution and infection.

[0003] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an automatic injection device for a syringe is provided, in order to achieve a more practical value purpose. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an automatic injection device for a syringe, which is achieved by the following specific technical means:

[0005] An automatic injection device for a syringe includes a bottom plate and a driving mechanism. An injection cylinder is installed on the top of the bottom plate, a rubber piston is installed inside the injection cylinder, and a connection groove is provided at the center of one end of the rubber piston. The driving mechanism includes a first cylinder and a second cylinder connected to each other. A lead screw is installed inside the second cylinder, a ball nut is installed on the lead screw, and the ball nut is fixedly connected to one end of the second cylinder. An installation port is provided at one end of the first cylinder, and a first driving motor is installed inside the installation port. The output shaft of the first driving motor is connected with a quick-release head, and the quick-release head is installed in the connection groove of the rubber piston.

[0006] Further, a limit card seat and a support seat are provided on the top side of the bottom plate. The limit card seat is composed of two groups of support plates, the support seat is composed of one group of support plates, and arc-shaped grooves are provided at the tops of the support plates.

[0007] Further, a pair of lugs are provided at one end of the injection cylinder, and the pair of lugs are installed between the two groups of support plates of the limit card seat.

[0008] Furthermore, the quick-release head includes a chassis, multiple groups of expansion blocks, and a drive disk. The chassis is fixedly connected to the mounting port. Multiple mounting chutes for mounting the expansion blocks are provided at the top of the chassis. One end of the top of each group of expansion blocks is provided with a drive shaft. Multiple drive grooves for driving the contraction of the expansion blocks are provided on the drive disk, and one end of each drive shaft is slidably mounted in the drive groove. The output shaft of the first drive motor is connected to the center of the drive disk. The diameter of the chassis is equal to the opening diameter of the connection groove of the rubber piston. An expansion groove is further provided inside the connection groove, and the diameter of the expansion groove is larger than the opening diameter of the connection groove.

[0009] Furthermore, the quick-release head includes a mounting disk fixedly connected to the mounting port. An installation chamber is provided at the center of one side of the mounting disk, and a gear connected to the first drive motor is installed at the center of the installation chamber. Rack bars are installed on both the upper and lower sides of the installation chamber near the gear, and the rack bars are engaged with the gear. A clamping block is slidably mounted on both the left and right sides of the mounting disk, and one side of each clamping block is respectively connected to one end of the rack bar. The clamping block can be engaged with the connection groove of the rubber piston.

[0010] Furthermore, the quick-release head includes a fixed cylinder fixedly connected to the mounting port. A threaded rod connected to the first drive motor is installed inside the fixed cylinder. A push cylinder is threadedly connected to the outer side of one end of the threaded rod. A support block is provided at one end of the push cylinder. One end of the fixed cylinder is a conical body, and an expansion head is provided at the end of the conical body. The expansion head can be engaged with the connection groove of the rubber piston. Multiple expansion grooves are equidistantly provided on the conical body. The support block is arranged inside the conical body and fits against its inner wall. A fixed seat is further installed inside the fixed cylinder. Multiple limiting blocks are provided on the inner side of the fixed seat. Multiple limiting chutes are provided on the outer side of the push cylinder, and the multiple limiting blocks are respectively slidably connected to the corresponding limiting chutes. The fixed cylinder is made of plastic material.

[0011] Furthermore, the other end of the second cylinder is provided with a connection port and is fixedly connected to the first cylinder through the connection port.

[0012] Furthermore, one end of the lead screw passes through one end of the second cylinder and is connected to a second drive motor on the outside.

[0013] Furthermore, the injection cylinder is made of medical-grade PP material.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By the cooperative use of the driving mechanism, the rubber piston and the injection cylinder, the present invention can achieve rapid and automatic extraction and injection of drugs, with high convenience in use. At the same time, by controlling the rotation amount of the driving motor two, the stroke of the rubber piston in the injection cylinder can be quickly controlled to ensure high precision during drug extraction and injection.

[0016] 2. By the cooperative use of the quick-release head and the driving motor one, the present invention can complete the rapid disassembly of the driving mechanism and the rubber piston, facilitating the replacement of the rubber piston and the injection cylinder, with high convenience in use.

[0017] 3. The present invention solves the problems of high pressure, difficult manual pushing strength and precision, and can also reduce the problems of drug mixing, secondary pollution and infection caused by non-replacement of the injection cylinder by humans. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the structural disassembly schematic diagram of the present invention.

[0019] Figure 2 is the overall assembly schematic diagram of the structure of the present invention.

[0020] Figure 3 is the structural decomposition schematic diagram of the quick-release head in Embodiment 1 of the present invention.

[0021] Figure 4 is the decomposition schematic diagram of the quick-release head, the driving motor one and the rubber piston in Embodiment 1 of the present invention.

[0022] Figure 5 is the cross-sectional view schematic diagram of the quick-release head in Embodiment 2 of the present invention.

[0023] Figure 6 is the cross-sectional view schematic diagram of the quick-release head in Embodiment 3 of the present invention.

[0024] In the figure, the corresponding relationship between the component names and the drawing reference numbers is as follows:

[0025] 1, bottom plate; 2, injection cylinder; 3, rubber piston; 4, quick-release head; 5, driving motor one; 6, cylinder one; 7, cylinder two; 8, ball nut; 9, lead screw; 10, driving motor two;

[0026] 101, limit card seat; 102, support seat;

[0027] 401. Chassis; 402. Installation chute; 403. Extension block; 404. Drive shaft; 405. Drive disk; 406. Drive slot; 407. Installation disk; 408. Gear; 409. Rack; 4010. Clamping block; 4011. Fixed cylinder; 4012. Extension head; 4013. Expansion slot; 4014. Pushing cylinder; 4015. Supporting block; 4016. Threaded rod; 4017. Fixed seat; 4018. Limit chute;

[0028] 601. Installation port;

[0029] 701. Connection port. Detailed implementation mode

[0030] The following further describes the implementation mode of the present invention in detail in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0031] In the description of the present invention, unless otherwise stated, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Embodiment 1:

[0034] As shown in the attached Figure 1 to the attached Figure 4 figures:

[0035] The present invention provides an automatic injection device for a syringe, which includes a bottom plate 1 and a driving mechanism. A syringe barrel 2 is installed on the top of the bottom plate 1. A rubber piston 3 is installed inside the syringe barrel 2. A connection groove is provided at the center of one end of the rubber piston 3. The driving mechanism includes a cylinder one 6 and a cylinder two 7 which are connected to each other. A lead screw 9 is installed inside the cylinder two 7. A ball nut 8 is installed on the lead screw 9, and the ball nut 8 is fixedly connected to one end of the cylinder two 7. An installation port 601 is provided at one end of the cylinder one 6, and a driving motor one 5 is installed inside the installation port 601. The output shaft of the driving motor one 5 is connected with a quick-release head 4, and the quick-release head 4 is installed in the connection groove of the rubber piston 3.

[0036] Wherein, a limit clamping seat 101 and a support seat 102 are provided on the top side of the bottom plate 1. The limit clamping seat 101 is composed of two groups of support plates. The support seat 102 is composed of one group of support plates, and arc-shaped grooves are provided at the top ends of the support plates.

[0037] Wherein, a pair of lugs are provided at one end of the syringe barrel 2, and the pair of lugs are installed between the two groups of support plates of the limit clamping seat 101. Through this setting, it can be ensured that the syringe barrel 2 can maintain a relatively stable state during the operation of the driving mechanism, so as to ensure the injection accuracy.

[0038] Wherein, the quick-release head 4 includes a chassis 401, multiple groups of expansion blocks 403 and a driving disc 405. The chassis 401 is fixedly connected to the installation port 601. Multiple installation sliding grooves 402 for installing the expansion blocks 403 are provided on the top of the chassis 401. Driving shafts 404 are provided at one ends of the multiple groups of expansion blocks 403. Multiple driving grooves 406 for driving the expansion blocks 403 to contract are provided on the driving disc 405, and one ends of the driving shafts 404 are slidably installed in the driving grooves 406. Through the multiple driving grooves 406 provided on the driving disc 405, it can be realized that when the driving disc 405 rotates, the multiple groups of expansion blocks 403 move simultaneously, so as to realize the quick fixing installation and disassembly with the rubber piston 3. The output shaft of the driving motor one 5 is connected to the center of the driving disc 405. The diameter of the chassis 401 is equal to the opening diameter of the connection groove of the rubber piston 3. An expansion groove is further provided inside the connection groove, and the diameter of the expansion groove is larger than the opening diameter of the connection groove. By providing the expansion groove in the connection groove, it can be ensured that after the quick-release head 4 drives the expansion blocks 403 to expand, a relatively stable connection can be formed with it, so as to ensure the synchronous movement of the quick-release head 4 and the rubber piston 3.

[0039] Wherein, a connection port 701 is provided at the other end of the cylinder two 7, and the cylinder two 7 is fixedly connected to the cylinder one 6 through the connection port 701.

[0040] One end of the lead screw 9 passes through one end of the second cylinder 7, and a second driving motor 10 is connected to the outside. During use, the second driving motor 10 can be fixed to the mounting carrier, and then the extraction and injection of the liquid medicine can be realized by starting the second driving motor 10.

[0041] Among them, the injection cylinder 2 is made of medical PP (polypropylene) material.

[0042] The working principle of this embodiment: Before use, first place the device at a suitable position on the workbench, fix the second driving motor 10, then connect the electrical components in the device to an external power supply and a control switch, and then it can be used through the external control switch; during use, through the cooperation of the driving mechanism with the rubber piston 3 and the injection cylinder 2, the rapid and automatic extraction and injection of the drug can be realized, and the convenience of use is relatively high. At the same time, by controlling the rotation amount of the second driving motor 10, the stroke of the rubber piston 3 in the injection cylinder 2 can be quickly controlled to ensure high precision during the extraction and injection of the drug. Through the cooperation of the quick-release head 4 and the first driving motor 5, the rapid disassembly of the driving mechanism and the rubber piston 3 can be completed, so as to facilitate the replacement of the rubber piston 3 and the injection cylinder 2 after a single operation, and the convenience of use is relatively high.

[0043] Embodiment 2:

[0044] As shown in the attached Figure 5 figure, the difference from Embodiment 1 is that the quick-release head 4 includes a mounting plate 407 fixedly connected to the mounting port 601. A mounting chamber is provided at the center of one side of the mounting plate 407, and a gear 408 connected to the first driving motor 5 is installed at the center of the mounting chamber. Rack bars 409 are installed on both the upper and lower sides of the mounting chamber close to the gear 408, and the rack bars 409 are engaged with the gear 408. Clamping blocks 4010 are slidably installed on both the left and right sides of the mounting plate 407, and one side of each clamping block 4010 is respectively connected to one end of the rack bar 409. The clamping blocks 4010 can be engaged with the connecting grooves of the rubber piston 3.

[0045] The working principle of this embodiment: During use, the first driving motor 5 is used to drive the rotation adjustment of the gear 408 to drive the relative movement of the rack bars 409, so as to realize the expansion and retraction of the clamping blocks 4010 in the connecting grooves of the rubber piston 3, so as to realize clamping and loosening, so as to complete the rapid disassembly of the driving mechanism and the rubber piston 3, so as to facilitate the replacement of the rubber piston 3 and the injection cylinder 2 after a single operation, and the convenience of use is relatively high.

[0046] Embodiment 3:

[0047] As shown in the attached Figure 6As shown, the difference from Embodiment 1 is that the quick-release head 4 includes a fixed cylinder body 4011 fixedly connected to the installation port 601. A threaded rod 4016 connected to the first driving motor 5 is installed inside the fixed cylinder body 4011. A push cylinder 4014 is threadedly connected to the outer side of one end of the threaded rod 4016. A support block 4015 is provided at one end of the push cylinder 4014. One end of the fixed cylinder body 4011 is a cone, and an expansion head 4012 is provided at the end of the cone. The expansion head 4012 can be engaged with the connection groove of the rubber piston 3. A plurality of groups of expansion grooves 4013 are equidistantly arranged on the cone. The support block 4015 is arranged inside the cone and fits with its inner wall. A fixed seat 4017 is also installed inside the fixed cylinder body 4011. A plurality of groups of limit blocks are provided on the inner side of the fixed seat 4017. A plurality of groups of limit sliding grooves 4018 are provided on the outer side of the push cylinder 4014. The plurality of limit blocks are respectively slidably connected to the limit sliding grooves 4018 in a corresponding manner. The fixed cylinder body 4011 is made of plastic material.

[0048] The working principle of this embodiment: During use, the threaded rod 4016 is driven to rotate and adjust by the first driving motor 5. Through the action of the thread and the fixed seat 4017 and the limit sliding grooves 4018, the push cylinder 4014 is driven to move in the fixed cylinder body 4011. When the push cylinder 4014 is driven to move towards the end of the cone of the fixed cylinder body 4011, the support block 4015 will squeeze the end of the cone, causing the expansion head 4012 to expand and deform and be fixedly engaged with the connection groove of the rubber piston 3. On the contrary, when the support block 4015 moves backward, the end of the cone will return to its original state. At this time, the expansion head 4012 is separated from the connection groove of the rubber piston 3, and the rubber piston 3 can be taken out.

[0049] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. An automatic injection device for a syringe, comprising a bottom plate (1) and a driving mechanism. A syringe barrel (2) is installed on the top of the bottom plate (1), and a rubber piston (3) is installed inside the syringe barrel (2). It is characterized in that: A connecting groove is provided at the center of one end of the rubber piston (3); the driving mechanism includes a first cylinder (6) and a second cylinder (7) connected to each other. A lead screw (9) is installed inside the second cylinder (7). A ball nut (8) is installed on the lead screw (9), and the ball nut (8) is fixedly connected to one end of the second cylinder (7). An installation port (601) is provided at one end of the first cylinder (6), and a first driving motor (5) is installed inside the installation port (601). The output shaft of the first driving motor (5) is connected to a quick-release head (4), and the quick-release head (4) is installed in the connecting groove of the rubber piston (3); the quick-release head (4) includes a fixed cylinder body (4011) fixedly connected to the installation port (601). A threaded rod (4016) connected to the first driving motor (5) is installed inside the fixed cylinder body (4011). A push cylinder (4014) is threadedly connected to the outer side of one end of the threaded rod (4016). A support block (4015) is provided at one end of the push cylinder (4014); one end of the fixed cylinder body (4011) is a conical body, and an expansion head (4012) is provided at the end of the conical body, and the expansion head (4012) can be engaged with the connecting groove of the rubber piston (3). A plurality of expansion grooves (4013) are equidistantly arranged on the conical body; the support block (4015) is arranged inside the conical body and fits with its inner wall; a fixed seat (4017) is also installed inside the fixed cylinder body (4011). A plurality of limit blocks are provided on the inner side of the fixed seat (4017). A plurality of limit sliding grooves (4018) are provided on the outer side of the push cylinder (4014), and the plurality of limit blocks are respectively slidably connected to the limit sliding grooves (4018); the fixed cylinder body (4011) is made of plastic material.

2. The automatic injection device of the syringe according to claim 1, wherein: A limit clamping seat (101) and a support seat (102) are provided on the top side of the bottom plate (1). The limit clamping seat (101) is composed of two support plates, and the support seat (102) is composed of one support plate. An arc groove is provided at the top end of each support plate.

3. The automatic injection device of the syringe according to claim 2, characterized in that: A pair of lugs are provided at one end of the injection cylinder (2), and the pair of lugs are installed between the two support plates of the limit clamping seat (101).

4. The automatic injection device of the syringe according to claim 1, characterized in that: A connection port (701) is provided at the other end of the second cylinder (7), and the second cylinder (7) is fixedly connected to the first cylinder (6) through the connection port (701).

5. The automatic injection device of the syringe according to claim 1, characterized in that: One end of the lead screw (9) passes through one end of the second cylinder (7), and a second driving motor (10) is connected to the outside.

6. The automatic injection device of the syringe according to claim 1, characterized in that: The injection cylinder (2) is made of medical PP material.

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