Syringe pump displacement stroke detection mechanism

Abstract

The utility model discloses a displacement stroke detection mechanism for an injection pump, which is provided with a pump body support convenient for infusion, and the inner surface of the pump body support is nested and assembled with a needle tube; it includes: a positioning block, which is nested and connected to the rear side of the outer surface of the needle tube, and a push-pull box is installed on the rear side of the outer surface of the positioning block, and a motor is installed on the lower side of the outer surface of the pump body support, and the output shaft of the motor is rotatably connected with a main gear. A pump body support convenient for movement is provided, and the assembled motor and the main gear cooperate to effectively control the secondary gear to rotate, and control the rotation of the threaded rod, so as to adjust the sleeve installed on the nut, and the syringe connected to the push-pull box assembled by the sleeve to form an infusion, improve the use stability, and cooperate with the limit block connected to the stopper assembled on the outer side of the nut to control the position of the moving block driven by the tension spring connected to the nested block, and calculate the moving distance of the moving block on the potentiometer.

Description

Technical Field

[0001] The utility model relates to the technical field of injection pumps, in particular to a displacement stroke detection mechanism for injection pumps. Background Art

[0002] A syringe pump is a medical device that can accurately control the speed and dosage of drug infusion, and deliver drugs to the patient's body through mechanical or electronic devices. It is suitable for fields such as surgery, intensive care, pain management and chemotherapy. It can accurately control the speed and dosage of drug infusion, effectively improve the treatment effect, and reduce side effects during use. However, there are still some problems with the use of existing syringe pumps.

[0003] In the prior art, the authorization publication (announcement) number: CN220193698U in "Injection assembly and injection pump" states that the injection assembly includes a housing, a screw, a nut seat assembly, a push rod and a push head. The screw and the nut seat assembly are arranged in the housing, and the nut seat assembly is sleeved on the screw, and the push head is connected to the nut seat assembly through the push rod. The screw and the nut seat assembly cooperate so that after the screw rotates, the nut seat assembly can be driven to reciprocate along the axial direction of the screw, so that the push head can push the piston rod of the syringe to move to inject the liquid medicine;

[0004] During the operation of the above-mentioned device, in the nut seat assembly, the sleeve is sleeved on the nut, so that the connection structure between the sleeve and the nut is more stable and reliable. The hardness of the nut is less than that of the sleeve, so that the wear of the nut and the screw during cooperation is reduced. The hardness of the sleeve is higher, so that the structural strength of the sleeve is better. When the nut seat assembly is subjected to axial impact force, the nut seat assembly can maintain structural stability, thereby preventing the injection assembly of the present application from being easily damaged when it falls. However, when in use, the injection pump must control the output of the liquid medicine in the syringe during infusion, and it is not convenient to detect the output of the liquid medicine through the mechanism that continuously pushes the liquid medicine in the syringe, which is likely to affect the delivery amount. Utility Model Content

[0005] The purpose of the utility model is to provide a displacement stroke detection mechanism for an injection pump to solve the problem in the above-mentioned background technology that the injection pump needs to control the output of the liquid medicine in the syringe during infusion, and it is inconvenient to detect the output amount of the liquid medicine through the mechanism that continuously pushes the liquid medicine in the syringe, which easily affects the delivery amount.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a displacement stroke detection mechanism of an injection pump is provided, a pump body bracket is provided for convenient use in infusion, and a needle tube is nested and assembled on the inner surface of the pump body bracket;

[0007] It includes: a positioning block, which is nested and connected to the rear side of the outer surface of the needle tube, and a push-pull box is installed on the rear side of the outer surface of the positioning block, and a motor is installed on the lower side of the outer surface of the pump body bracket, and a main gear is rotatably connected to the output shaft of the motor;

[0008] A gear is meshed with the outer surface of the main gear, and the lower side of the inner surface of the gear is meshed with a secondary gear, and the rear side of the outer surface of the secondary gear is meshed with a sub-gear, and a threaded rod is installed on the inner surface of the sub-gear, and one end of the threaded rod is rotated and nested in the inner surface of the pump body bracket;

[0009] A nut is threadedly connected to the outer surface of the threaded rod, and a slider is installed on the outer surface of the nut, and the slider is limited to slide on the upper side of the inner surface of the pump body bracket, and a stopper is installed on the lower surface of the slider;

[0010] The guide column is installed on the lower side of the inner surface of the pump body bracket, and the outer surface of the guide column is slidably connected with a stopper, and the outer surface of the stopper is installed with a limit block, and the outer surface of the limit block is installed with a sleeve.

[0011] Preferably, the needle tube forms a limited nested structure with the push-pull box through the positioning block, and the pump body bracket forms a rotating structure with the motor and the main gear, and the main gear forms a linked rotating structure with the belt gear, the secondary gear and the sub-gear.

[0012] Through the above structure, it is convenient to effectively control the auxiliary gear to form a linked deceleration rotation during use, thereby controlling the subsequent threaded rod to form a positioning rotation.

[0013] Preferably, the secondary gear and the threaded rod form an integrated structure, and the threaded rod and the pump body bracket form a positioning rotation structure, and the threaded rod and the slider form a threaded structure through the nut, and the slider and the pump body bracket form a positioning sliding structure.

[0014] Through the above structure, the rotation of the nut can be effectively controlled during use, thereby adjusting the position of the push rod on the needle cylinder.

[0015] Preferably, the sliding block is embedded in the upper surface of the stopper, and the stopper forms a limited sliding structure with the pump body bracket through the guide column, and the stopper forms an integrated structure with the limit block, the sleeve and the push-pull box.

[0016] Through the above structure, the stopper and the guide column are effectively matched during use to control the stability of the slider.

[0017] Preferably, a nested block is installed on the upper surface of the limit block, and a tension spring is nested on the outer surface of the nested block, and a moving block is nested on the other side of the outer surface of the tension spring, while a potentiometer is slidably connected to the outer surface of the moving block, and a travel block is installed on the outer surface of the nested block.

[0018] Through the above structure, it is convenient to effectively form a sliding connection, detect the displacement distance, and control the quantitative infusion during use.

[0019] Preferably, the nested block forms an elastic nested structure with the moving block through a tension spring, the moving block and the potentiometer form a sliding structure, and the nested block forms a stroke detection structure with the stroke block and the pump body bracket.

[0020] With the above structure, the amount of liquid infused by the syringe can be detected by the change in the distance moved by the potentiometer during use.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. A pump body bracket that is easy to move is provided, and the assembled motor and main gear cooperate to effectively control the rotation of the secondary gear and the rotation of the threaded rod, so as to adjust the sleeve installed by the nut and the syringe connected to the push-pull box assembled by the sleeve to form an infusion, thereby improving the stability of use, and cooperate with the limit block connected to the stop block assembled on the outside of the nut to control the position of the moving block driven by the tension spring connected to the nested block, and calculate the moving distance of the moving block on the potentiometer;

[0023] 2. A positioning block and a push-pull box are provided to facilitate nested assembly, control the position of the push rod on the needle tube to prevent it from falling off, and the main gear, belt gear, secondary gear and sub-gear assembled in coordination with the motor are meshed with each other, thereby controlling the use of the threaded rod and adjusting the position of the nut. The nut can be used in conjunction with a slider, a stopper and a guide column to improve the stability of the movement of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the pump body support of the utility model;

[0025] Figure 2 This is a semi-sectioned three-dimensional structural diagram of the pump body bracket of the utility model;

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the sleeve of the utility model;

[0027] Figure 4 This is a schematic diagram of the partial three-dimensional structure of the stopper of the utility model;

[0028] Figure 5 It is a schematic diagram of the local three-dimensional structure of the moving block of the utility model.

[0029] In the figure: 1. Pump body bracket; 2. Needle tube; 3. Positioning block; 4. Push-pull box; 5. Motor; 6. Main gear; 7. Belt gear; 8. Secondary gear; 9. Sub-gear; 10. Threaded rod; 11. Nut; 12. Slider; 13. Stop block; 14. Guide column; 15. Limit block; 16. Sleeve; 17. Nesting block; 18. Tension spring; 19. Moving block; 20. Potentiometer; 21. Travel block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 5 , the utility model provides the following technical solutions: a syringe pump displacement stroke detection mechanism is provided, a pump body bracket 1 is provided for easy use of infusion, and a needle tube 2 is nested and assembled on the inner surface of the pump body bracket 1;

[0032] It includes: a positioning block 3, which is nested and connected to the rear side of the outer surface of the needle tube 2, and a push-pull box 4 is installed on the rear side of the outer surface of the positioning block 3, and a motor 5 is installed on the lower side of the outer surface of the pump body bracket 1, and a main gear 6 is rotatably connected to the output shaft of the motor 5;

[0033] The belt gear 7 is meshed with the outer surface of the main gear 6, and the lower side of the inner surface of the belt gear 7 is meshed with the secondary gear 8, and the rear side of the outer surface of the secondary gear 8 is meshed with the sub-gear 9, and the inner surface of the sub-gear 9 is axially mounted with a threaded rod 10, and one end of the threaded rod 10 is rotated and nested in the inner surface of the pump body bracket 1;

[0034] The needle tube 2 forms a limited nested structure with the push-pull box 4 through the positioning block 3, and the pump body bracket 1 forms a rotating structure with the main gear 6 through the motor 5, and the main gear 6 forms a linked rotating structure through the belt gear 7, the secondary gear 8 and the sub-gear 9.

[0035] The auxiliary gear 9 and the threaded rod 10 form an integrated structure, and the threaded rod 10 and the pump body bracket 1 form a positioning rotation structure, and the threaded rod 10 and the slider 12 form a threaded structure through the nut 11, and the slider 12 and the pump body bracket 1 form a positioning sliding structure.

[0036] When in use, the needle tube 2 is stably nested in the inner surface of the pump body bracket 1, and the positioning block 3 assembled with the push-pull box 4 set on the pump body bracket 1 is matched to position the push rod used for the needle tube 2, control the needle tube 2 to form washing liquid and infusion, and cooperate with the motor 5 on the pump body bracket 1 to start, control the conveying shaft to drive the main gear 6 to rotate, and cooperate with the meshing connection between the assembled belt gear 7, the secondary gear 8 and the sub-gear 9, so as to form a reduced rotation, and control the positioning rotation of the threaded rod 10 assembled with the sub-gear 9 on the pump body bracket 1, and control the position of the nut 11, so as to control the position of the push-pull box 4 assembled with the slider 12 and the sleeve 16 outside the nut 11, so as to improve the stability of use;

[0037] The nut 11 is threadedly connected to the outer surface of the threaded rod 10, and a slider 12 is installed on the outer surface of the nut 11, and the slider 12 is limited to slide on the upper side of the inner surface of the pump body bracket 1, and a stopper 13 is installed on the lower surface of the slider 12;

[0038] The guide column 14 is installed on the lower side of the inner surface of the pump body bracket 1 , and the outer surface of the guide column 14 is slidably connected with the stopper 13 , and the outer surface of the stopper 13 is installed with a limit block 15 , and the outer surface of the limit block 15 is installed with a sleeve 16 .

[0039] The slider 12 and the upper surface of the stopper 13 are embedded and installed, and the stopper 13 and the pump body bracket 1 form a limited sliding structure through the guide column 14, and the stopper 13, the limit block 15, the sleeve 16 and the push-pull box 4 form an integrated structure.

[0040] A nesting block 17 is installed on the upper surface of the limit block 15, and a tension spring 18 is nested and connected to the outer surface of the nesting block 17, and a moving block 19 is nested and connected to the other side of the outer surface of the tension spring 18. At the same time, a potentiometer 20 is slidably connected to the outer surface of the moving block 19, and a travel block 21 is installed on the outer surface of the nesting block 17.

[0041] The nesting block 17 forms an elastic nesting structure with the moving block 19 through the tension spring 18, and the moving block 19 and the potentiometer 20 form a sliding structure. The nesting block 17 forms a stroke detection structure with the pump body bracket 1 through the stroke block 21.

[0042] When the threaded rod 10 controls the nut 11 to form a positioning rotation, the stopper 13 installed on the slider 12 assembled by the nut 11 can be controlled to move forward, and when the stopper 13 moves, the guide column 14 assembled by the pump body bracket 1 and the stopper 13 will slide in a limited manner, control the limit adjustment of the nut 11, and control the synchronous movement of the limit block 15, and drive the push-pull box 4 assembled by the sleeve 16 and the positioning block 3 installed thereon to nest the push rod on the needle tube 2, control the push rod to squeeze the liquid in the needle tube 2, and slide in a limited manner between the moving block 19 connected by the tension spring 18 assembled by the nesting block 17 and the potentiometer 20, cooperate with the change in the moving distance of the moving block 19 on the potentiometer 20, detect the infusion amount of the needle tube 2, and cooperate with the stroke block 21 to prevent the push rod on the needle tube 2 from being excessively moved, which can effectively improve the stability of use.

[0043] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A displacement stroke detection mechanism for an injection pump, wherein a pump body bracket (1) is provided for easy use for infusion, and a needle tube (2) is nested and assembled on the inner surface of the pump body bracket (1); It is characterized in that include: A positioning block (3) is nested and connected to the rear side of the outer surface of the needle tube (2), and a push-pull box (4) is installed on the rear side of the outer surface of the positioning block (3), and a motor (5) is installed on the lower side of the outer surface of the pump body bracket (1), and a main gear (6) is rotatably connected to the output shaft of the motor (5); A belt gear (7) is meshedly connected to the outer surface of the main gear (6), and the lower side of the inner surface of the belt gear (7) is meshedly connected to a secondary gear (8), and the rear side of the outer surface of the secondary gear (8) is meshedly connected to a sub-gear (9), and a threaded rod (10) is installed on the inner surface axis of the sub-gear (9), and one end of the threaded rod (10) is rotated and nested in the inner surface of the pump body bracket (1); A nut (11) is threadedly connected to the outer surface of the threaded rod (10), and a slider (12) is installed on the outer surface of the nut (11), and the slider (12) is limitedly slid on the upper side of the inner surface of the pump body bracket (1), and a stopper (13) is installed on the lower surface of the slider (12); A guide column (14) is mounted on the lower side of the inner surface of the pump body bracket (1), and the outer surface of the guide column (14) is slidably connected to a stopper (13), and a limit block (15) is mounted on the outer surface of the stopper (13), and a sleeve (16) is mounted on the outer surface of the limit block (15).

2. The syringe pump displacement stroke detection mechanism according to claim 1, characterized in that: The needle tube (2) forms a limited nesting structure with the push-pull box (4) through the positioning block (3), and the pump body bracket (1) forms a rotating structure with the motor (5) and the main gear (6), and the main gear (6) forms a linked rotating structure with the belt gear (7), the secondary gear (8) and the auxiliary gear (9).

3. The syringe pump displacement stroke detection mechanism according to claim 1, characterized in that: The secondary gear (9) and the threaded rod (10) form an integrated structure, and the threaded rod (10) and the pump body bracket (1) form a positioning rotation structure, and the threaded rod (10) and the slider (12) form a threaded structure through the nut (11), and the slider (12) and the pump body bracket (1) form a positioning sliding structure.

4. The syringe pump displacement stroke detection mechanism according to claim 1, characterized in that: The sliding block (12) and the upper surface of the stopper (13) are embedded and installed, and the stopper (13) forms a limited sliding structure with the pump body bracket (1) through the guide column (14), and the stopper (13) forms an integrated structure with the limit block (15), the sleeve (16) and the push-pull box (4).

5. The syringe pump displacement stroke detection mechanism according to claim 1, characterized in that: A nesting block (17) is installed on the upper surface of the limit block (15), and a tension spring (18) is nested and connected to the outer surface of the nesting block (17), and a moving block (19) is nested and connected to the other side of the outer surface of the tension spring (18), while a potentiometer (20) is slidably connected to the outer surface of the moving block (19), and a travel block (21) is installed on the outer surface of the nesting block (17).

6. The syringe pump displacement stroke detection mechanism according to claim 5, characterized in that: The nesting block (17) forms an elastic nesting structure through a tension spring (18) and a moving block (19), and the moving block (19) and a potentiometer (20) form a sliding structure, and the nesting block (17) forms a stroke detection structure through a stroke block (21) and a pump body bracket (1).

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