Automatic medicine pushing device

Abstract

The utility model relates to an automatic medicine pusher which comprises an injector and a fixing device connected with the injector, the fixing device comprises a driving assembly and a telescopic assembly, the telescopic assembly comprises a fixing sleeve and a movable rod located in the fixing sleeve, the fixing sleeve is fixed on the driving assembly, the outer end of the movable rod is matched with a push handle of the injector, and the movable rod is fixed on the driving assembly. The driving assembly is used for driving the movable rod to linearly move in the axial direction. An adjustable limiting structure is arranged between the fixed sleeve and the movable rod, and at least two movement end points of the movable rod can be limited through the adjustable limiting structure. By means of the arrangement, switching between the pushing injection state and the suction state of the injector is achieved through the driving assembly and the telescopic assembly in the fixing device, labor force is liberated through the automatic mode, and meanwhile the injection amount of the device can be controlled through the adjustable limiting structure.

Description

Technical Field

[0001] This utility model relates to the field of injection device technology, and in particular to an automatic drug injector. Background Technology

[0002] Intraocular injection of drugs in mice is an essential procedure in the development of many ophthalmic drugs. Whether studying the mechanisms of ophthalmic diseases or comparing the advantages and disadvantages of different administration methods, intraocular injection in mice is necessary. Currently, the main intraocular injection methods in mice are intravitreal injection and subretinal injection, both requiring a 5-10 μL injection needle. This procedure requires two people: one to hold the needle in place under a microscope, and the other to slowly inject the drug, resulting in a significant waste of manpower and time. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and provide an automatic drug delivery device, including a syringe and a fixing device connected to the syringe. The fixing device includes a drive assembly and a telescopic assembly. The telescopic assembly includes a fixed sleeve and a movable rod located inside the fixed sleeve. The fixed sleeve is fixed to the drive assembly. The outer end of the movable rod cooperates with the push handle of the syringe. The drive assembly is used to drive the movable rod to move linearly along the axial direction.

[0004] An adjustable limiting structure is provided between the fixed sleeve and the movable rod, which can limit the movement of at least two moving ends of the movable rod.

[0005] Preferably, the device includes a fixed rod and a push rod, which are arranged parallel to each other at the front and rear ends of the fixing device. One end of the fixed rod is fixedly connected to the bottom end of the fixing device, and the other end is detachably connected to the syringe barrel. One end of the push rod is connected to the movable rod, and the other end is provided with a push block connected to the syringe handle.

[0006] Preferably, the adjustable limiting structure includes a limiting block, and the fixed sleeve is provided with an adjustment hole for the limiting block to extend into or out of the fixed sleeve. One end of the limiting block extends into the fixed sleeve through the hole to form a limiting end, and the other end is located outside the fixed sleeve to form a fixed end, and the fixed end is detachably connected to the fixed sleeve.

[0007] Preferably, the adjustable limiting structure includes an adjustment component with a scale, the adjustment component being connected to the fixed sleeve and the adjustment component moving linearly along the axial direction on the fixed sleeve.

[0008] Preferably, the adjusting component is a sleeve, which is disposed between the fixed sleeve and the telescopic component. The rear end of the sleeve is threadedly connected to the front end of the fixed sleeve, and the top of the front end of the sleeve is provided with a rotating block for the user to rotate, and the diameter of the rotating block is larger than the diameter of the fixed sleeve.

[0009] Preferably, the drive assembly is a rotary motor, the movable rod is hollow and contains a ball nut and a lead screw, and the output shaft of the drive assembly is connected to the lead screw.

[0010] Preferably, the fixing sleeve is provided with a multi-position switch for controlling the speed of the drive component; the fixing device is provided with a distance measuring device for measuring the extension length of the telescopic component.

[0011] Preferably, the system includes a control system, which includes a control module, a drive module, a speed regulation module, and a switch module. The control module is electrically connected to the speed regulation module and the switch module, and the drive module is electrically connected to the speed regulation module.

[0012] The switch module is used for user control of the opening and closing of the drive component and its movement speed;

[0013] The speed control module receives the status information of the multi-position switch to adjust the movement speed of the drive component accordingly and outputs a PWM signal to the drive module.

[0014] The drive module receives a PWM wave from the speed control module to start the drive components.

[0015] Preferably, it includes a PWM speed control processing module, which includes a filter circuit and a voltage conversion module;

[0016] The filtering circuit is used to filter the PWM signal and transmit the processed data to the voltage conversion module.

[0017] The voltage conversion module is used to convert the data processed by the filtering circuit into a voltage range value that can be accepted by the driving module.

[0018] Preferably, the driving module includes a driving circuit, which is an H-bridge driving circuit.

[0019] The beneficial effects of this utility model are as follows: the switching between the injection and aspiration states of the syringe is realized through the drive component and telescopic component in the fixed device. The fully automatic mode liberates labor. The speed of the drive component can be adjusted through the multi-position switch, thereby changing the speed of the syringe and improving the injection accuracy of this utility model. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0021] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0022] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0024] Figure 4 This is a cross-sectional view of Embodiment 2 of the present invention;

[0025] Figure 5 This is the circuit diagram of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0027] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0028] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0029] Example 1:

[0030] like Figure 1 and Figure 2 as well as Figure 5 As shown, this is a first embodiment of the present invention. This embodiment includes a syringe 1 and a fixing device 2 connected to the syringe. The fixing device 2 includes a driving component 3 and a telescopic component 4. The telescopic component 4 includes a fixed sleeve 41 and a movable rod 42 located inside the fixed sleeve. The fixed sleeve 41 is fixed on the driving component 3. The outer end of the movable rod 42 cooperates with the push handle of the syringe 1. The driving component 3 is used to drive the movable rod 42 to move linearly along the axial direction.

[0031] An adjustable limiting structure is provided between the fixed sleeve 41 and the movable rod 42, which can limit at least two moving ends of the movable rod 42.

[0032] It is understood that the telescopic component 4 and the drive component 3 are set inside the fixed device 2. When the telescopic component 4 moves up and down along the axial direction on the fixed device 2, the connection between the telescopic component 4 and the push handle at the top of the syringe 1 enables the syringe 1 to switch between the two states of injection and aspiration. At the same time, the adjustable limiting structure can control the injection volume of this device.

[0033] It includes a fixed rod 21 and a push rod 22, which are arranged in parallel at the front and rear ends of the fixing device 2. One end of the fixed rod 21 is fixedly connected to the bottom end of the fixing device 2, and the other end is detachably connected to the syringe barrel of the syringe 1. One end of the push rod 22 is connected to the movable rod 42, and the other end is provided with a push block 23 connected to the push handle of the syringe 1.

[0034] It is understandable that the fixing device 2 can be used with syringes of different syringe diameters because the fixing rod 21 is detachably connected to the syringe barrel of the syringe 1. The push block 23 is detachably connected to the push handle of the syringe 1, for example, the push block 23 is equipped with a suction cup, a snap-fit ​​connection, etc.

[0035] The adjustable limiting structure includes a limiting block 51. The fixing sleeve 41 is provided with an adjustment hole 411 for the limiting block 51 to extend or extend, and a positioning hole 412 for fixing the limiting block 51. The positioning hole 412 is provided on both sides of the adjustment hole 411.

[0036] One end of the limiting block 51 extends into the fixing sleeve 41 through the hole to form a limiting end, and the other end is located outside the fixing sleeve 41 to form a fixing end. The fixing end cooperates with the positioning hole 412 to fix the limiting block 51 on the adjustment hole 411.

[0037] It is understandable that the injection volume is controlled by adjusting the position of the limit block 51 at the adjustment hole 411.

[0038] The drive assembly 3 is a rotary motor. The movable rod 42 is hollow and contains a ball nut 44 and a lead screw 43. The output shaft of the drive assembly 3 is connected to the lead screw 43.

[0039] The fixed sleeve 41 is provided with a multi-position switch 6 for controlling the movement speed of the drive component 3; the fixed device 2 is provided with a distance measuring device for measuring the extension length of the telescopic component 4.

[0040] The system includes a control module 20, a drive module 30, a speed control module, and a switch module 210. The control module 20 is electrically connected to the speed control module and the switch module 210, and the drive module 30 is electrically connected to the speed control module.

[0041] The switch module 210 is used for user control of the opening and closing of the drive component 3 and its movement speed;

[0042] The speed control module receives the status information from the switch module 210 to adjust the movement speed of the drive component 3 accordingly and outputs a PWM signal to the drive module 30.

[0043] The drive module 30 receives a PWM wave from the speed control module to start the drive component 3.

[0044] It is understood that the speed control module is implemented by the circuit built into the control module. The switch module 210 includes a speed control switch and an on / off switch. The user controls the switch module 210 to the on / off state or the speed control state. The control module 20 receives the status information from the switch module 210 and adjusts the movement speed of the drive component 3 accordingly through the speed control module and outputs a PWM signal to the drive module 30.

[0045] As the user controls the multi-position switch 6 to a certain state, the control module outputs different PWM signals corresponding to that state, and the PWM signals control the speed of the drive component 3.

[0046] The system includes a power supply filter circuit 110 and a switching power supply circuit 120. The power supply filter circuit 110 filters the input signal, and its output is connected to the input of the switching power supply circuit 120. The output of the switching power supply circuit 120 is connected to the power supply of the control module 20. This embodiment can use a chip with all the above functions, such as the STM32F103. The main control chip of the switching power supply circuit used in this embodiment is the AP8505.

[0047] It includes a PWM speed control processing module 40, which includes a filter circuit 410 and a voltage conversion module 420;

[0048] The filtering circuit 410 is used to filter the PWM signal and transmit the processed data to the voltage conversion module 420.

[0049] The voltage conversion module 420 is used to convert the data processed by the filter circuit into a voltage range value that can be accepted by the drive module 30.

[0050] The driving module 30 includes a driving circuit 310, which is an H-bridge driving circuit.

[0051] This embodiment can use a chip with driving function, such as KP86201KGA.

[0052] The system includes a distance measuring module, which is electrically connected to the control module 20. The distance measuring module is used to measure the distance between the telescopic component 4 and the drive component 3 and input it to the control module 20. The control module 20 receives this distance and determines whether the distance has changed within a specific time range. When the distance value has not changed, the drive component 3 is in the off state.

[0053] It is understandable that when the telescopic component 4 moves downward and comes into contact with the limiting block 51, the distance between the telescopic component 4 and the driving component 3 no longer changes, and at this time the control module 20 will no longer output a PWM signal to the driving module 30.

[0054] Example 2:

[0055] like Figures 3 to 5 This embodiment has overlapping parts with Embodiment 1, which will not be repeated here. The adjustable limiting structure includes an adjusting component 52 with a scale. The adjusting component 52 is connected to the front end of the fixed sleeve 41 and moves linearly along the axial direction on the fixed sleeve 41. The adjusting component 52 includes a limiting member. When the range of the adjusting component 52 is set, the limiting member can restrict the adjusting component 52 to a certain position.

[0056] It is understood that the adjustment component 52, in conjunction with the limiting member, can control the extension and retraction length of the telescopic component 4, thereby controlling the injection volume of the syringe 1. The adjustment component 52 can be implemented in any way that enables the adjustment component 52 to move linearly along the axial direction on the fixed sleeve 41, such as a slider, gear, etc.

[0057] The adjusting component 52 is a sleeve with a scale 511. The sleeve is positioned between the fixed sleeve 41 and the telescopic component 4. The rear end of the sleeve is threaded to the front end of the fixed sleeve 41. The top of the front end of the sleeve is provided with a rotating block 521 for the user to rotate, and the diameter of the rotating block 521 is larger than the diameter of the fixed sleeve 41.

[0058] Understandably, when the telescopic component 4 moves downward and abuts against the sleeve, the telescopic component 4 tends to push the sleeve downward. The threaded connection between the rear end of the sleeve and the front end of the fixed sleeve 41 prevents the sleeve from moving downward in a straight line along with the telescopic component 4, thus serving as a limiting function. By rotating the rotating block 521, the sleeve can move in a straight line on the fixed sleeve 41, and rotating the rotating block 521 can prevent it from touching the outer wall of the sleeve, thus avoiding wear on the scale set on the outer wall of the sleeve.

[0059] When the adjusting component 52 extends out of the fixed sleeve 41 and the upper end of the adjusting component 52 abuts against the lower end of the telescopic component 4, the distance between the telescopic component 4 and the drive component 3 no longer changes, and the control module 20 will no longer output PWM signals to the drive module 30.

[0060] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, optical disk, etc.

[0061] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0062] It should be noted that embodiments of this utility model can be implemented using hardware, software, or a combination of both. The hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor or dedicated hardware. Those skilled in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and / or included in processor control code, for example, such code provided on a programmable memory or a data carrier such as an optical or electronic signal carrier.

[0063] Furthermore, although the operation of the method of this invention is described in a specific order in the accompanying drawings, this does not require or imply that the operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. On the contrary, the steps depicted in the flowchart can be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps. It should also be noted that the features and functions of two or more devices according to this invention can be embodied in one device. Conversely, the features and functions of one device described above can be further divided and embodied by multiple devices.

[0064] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An automatic medicine pusher, characterized in that: The device includes a syringe (1) and a fixing device (2) connected to the syringe (1). The fixing device (2) includes a drive assembly (3) and a telescopic assembly (4). The telescopic assembly (4) includes a fixed sleeve (41) and a movable rod (42) located inside the fixed sleeve. The fixed sleeve (41) is fixed on the drive assembly (3). The outer end of the movable rod (42) cooperates with the push handle of the syringe (1). The drive assembly (3) is used to drive the movable rod (42) to move linearly along the axial direction. An adjustable limiting structure is provided between the fixed sleeve (41) and the movable rod (42), which can limit at least two moving ends of the movable rod (42).

2. The automatic medicine pusher according to claim 1, characterized in that: It includes a fixed rod (21) and a push rod (22), which are arranged in parallel at the front and rear ends of the fixing device (2). One end of the fixed rod (21) is fixedly connected to the bottom end of the fixing device (2), and the other end is detachably connected to the syringe barrel of the syringe (1). One end of the push rod (22) is connected to the movable rod (42), and the other end is provided with a push block (23) connected to the push handle of the syringe (1).

3. The automatic medicine pusher according to claim 1, characterized in that: The adjustable limiting structure includes a limiting block (51), and the fixing sleeve (41) is provided with an adjustment hole (411) for the limiting block (51) to extend or extend and a positioning hole (412) for fixing the limiting block (51). The positioning hole (412) is provided on both sides of the adjustment hole (411).

4. The automatic medicine pusher according to claim 1, characterized in that: The adjustable limiting structure includes an adjustment component (52) with a scale, the adjustment component (52) is connected to the fixed sleeve (41) and the adjustment component (52) moves linearly along the axial direction on the fixed sleeve (41).

5. The automatic medicine pusher according to claim 4, characterized in that: The adjusting component (52) is a sleeve, which is disposed between the fixed sleeve (41) and the telescopic component (4). The rear end of the sleeve is threadedly connected to the front end of the fixed sleeve (41), and the top of the front end of the sleeve is provided with a rotating block (521) for the user to rotate, and the diameter of the rotating block (521) is larger than the diameter of the fixed sleeve (41).

6. The automatic medicine pusher according to claim 1, characterized in that: The drive assembly (3) is a rotary motor. The movable rod (42) is hollow and contains a ball nut (44) and a lead screw (43). The output shaft of the drive assembly (3) is connected to the lead screw (43).

7. The automatic medicine pusher according to claim 1, characterized in that: The fixed sleeve (41) is provided with a multi-position switch (6) for controlling the movement speed of the drive assembly (3); the fixed device (2) is provided with a distance measuring device for measuring the extension length of the telescopic assembly (4).

8. The automatic medicine pusher according to claim 1, characterized in that: The system includes a control module, a drive module, a speed regulation module, and a switch module. The control module is electrically connected to the speed regulation module and the switch module, and the drive module is electrically connected to the speed regulation module. The switch module is used for user control of the opening and closing of the drive component and its movement speed; The speed control module receives the status information of the multi-position switch to adjust the movement speed of the drive component accordingly and outputs a PWM signal to the drive module. The drive module receives a PWM wave from the speed control module to start the drive components.

9. The automatic medicine pusher according to claim 8, characterized in that: It includes a PWM speed control processing module, which includes a filter circuit and a voltage conversion module; The filtering circuit is used to filter the PWM signal and transmit the processed data to the voltage conversion module. The voltage conversion module is used to convert the data processed by the filtering circuit into a voltage range value that can be accepted by the driving module.

10. The automatic medicine pusher according to claim 8, characterized in that: The driving module includes a driving circuit, which is an H-bridge driving circuit.

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