Injection pump with locking device

Abstract

The utility model belongs to the field of medical instruments, particularly relates to an injection pump with a locking device, and aims to solve the problems that a device for limiting and locking the conventional injection pump is not arranged outside the conventional injection pump, a user possibly touches a button by mistake when the injection pump is not used, and then redundant liquid leaks to the external environment to cause unnecessary waste. According to the technical scheme, the device comprises a support, a lead screw, a first motor and a locking assembly, an empty cylinder is installed on one side of the support, a piston column is connected to the interior of the empty cylinder in a sliding mode, and a piston is fixedly connected to one end of the piston column. The screw rod can be conveniently fixed, rotation of the screw rod is avoided, the position of the piston column can be locked, redundant liquid leakage is avoided, the screw rod can rotate to drive the threaded block to move up and down, the threaded block drives the piston column to move in the hollow cylinder, liquid in the hollow cylinder can be conveniently squeezed out, and movement is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an injection pump with a locking device. Background Art

[0002] The syringe pump is composed of a stepper motor and its driver, a screw and a bracket, etc. It has a reciprocating screw and nut, so it is also called a screw pump. The nut is connected to the piston of the syringe, and the syringe contains the liquid medicine, achieving high-precision, smooth and pulsation-free liquid transmission.

[0003] During the use of the existing injection pump, there is a lack of a device on the outside of the injection pump to limit and lock it. When the injection pump is not in use, the user may accidentally touch the button, which may cause excess liquid to leak into the external environment and cause unnecessary waste. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that there is a lack of a device for limiting and locking the outside of the injection pump, and the user may accidentally touch the button when the injection pump is not in use, thereby causing excess liquid to leak into the external environment and causing unnecessary waste, and to propose a injection pump with a locking device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A syringe pump with a locking device comprises a bracket, a screw rod, a first motor and a locking assembly, wherein a hollow cylinder is mounted on one side of the bracket, a piston rod is slidably connected to the inside of the hollow cylinder, a piston is fixedly connected to one end of the piston rod, and the piston is in close contact with the inner wall of the hollow cylinder;

[0007] The screw rod is rotatably connected to the inside of the bracket, the circumferential thread of the screw rod is connected to a thread block, the other end of the piston column is fixedly connected to the thread block, and the top of the screw rod is fixedly connected to a gear;

[0008] The first motor is fixedly connected to the inside of the bracket, one end of the output shaft of the first motor and the bottom of the screw are fixedly connected with a synchronous wheel, and a synchronous belt is transmission-connected between the two synchronous wheels;

[0009] The locking assembly is arranged inside the bracket, and the locking assembly is used to limit the position of the piston column.

[0010] In a possible design, the locking assembly includes a motor, which is fixedly connected to the inside of the bracket, and one end of the motor output shaft is fixedly connected to a bidirectional screw, which is rotatably connected to the inside of the bracket, and the circumferential thread of the bidirectional screw is connected to two connecting columns, and the two connecting columns are fixedly connected to locking blocks on one side close to each other, and the two locking blocks are engaged with gears.

[0011] In a possible design, a second motor is fixedly connected to the top inner wall of the bracket, one end of the output shaft of the second motor is fixedly connected to a valve head, and the valve head is fixedly installed on one end of the empty cylinder.

[0012] In a possible design, two guide rails are fixedly connected inside the bracket, the two guide rails are respectively located on both sides of the gear, and the connecting columns are respectively slidably connected on the upper surfaces of the guide rails.

[0013] In a possible design, a sliding groove is provided on one side of the bracket, and the threaded block is slidably connected in the sliding groove.

[0014] In a possible design, a cross-shaped reinforcement column is fixedly connected to the circumference of the piston column.

[0015] In the present application, when in use, liquid is poured into the empty cylinder, the first motor drives one of the synchronous wheels to rotate, one of the synchronous wheels drives the other synchronous wheel to rotate through the synchronous belt, thereby driving the screw to rotate, the screw rotation can drive the threaded block to move up and down, the threaded block drives the piston column to move in the empty cylinder, so as to squeeze out the liquid in the empty cylinder, and the second motor drives the valve head to rotate to control the flow direction of the liquid in the empty cylinder;

[0016] When liquid is not needed to flow out, the motor drives the bidirectional screw to rotate, and the bidirectional screw drives the two connecting columns to move. The connecting columns drive the locking blocks to move toward the middle, so that the gears engage with the two locking blocks, which is convenient for fixing the screw to prevent it from rotating, and can lock the position of the piston column to prevent excess liquid leakage.

[0017] In the utility model, the injection pump with a locking device, through the setting of the locking assembly, the connecting column drives the locking blocks to move toward the middle respectively, so that the gear is engaged with the two locking blocks, which is convenient for fixing the screw rod to prevent it from rotating, and can lock the position of the piston column to prevent excess liquid leakage;

[0018] In the utility model, the injection pump with a locking device is provided with a screw rod, and the rotation of the screw rod can drive the threaded block to move up and down, and the threaded block drives the piston column to move in the empty cylinder, so that the liquid in the empty cylinder can be squeezed out and the movement is relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of a syringe pump with a locking device proposed by the utility model;

[0020] Figure 2 This is a side structural schematic diagram of a syringe pump with a locking device proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of a side sectional structure of a syringe pump with a locking device proposed by the utility model;

[0022] Figure 4 The utility model is a schematic diagram of the locking assembly structure of a syringe pump with a locking device.

[0023] In the figure: 1. bracket; 2. empty cylinder; 3. piston column; 4. threaded block; 5. first motor; 6. screw rod; 7. second motor; 8. valve head; 9. sliding groove; 10. gear; 11. synchronous wheel; 12. synchronous belt; 13. motor; 14. bidirectional screw; 15. connecting column; 16. locking block; 17. guide rail. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Example 1

[0026] Reference Figure 1-Figure 4 A syringe pump with a locking device comprises: a bracket 1, a screw rod 6, a first motor 5 and a locking assembly, a hollow cylinder 2 is installed on one side of the bracket 1, a piston column 3 is slidably connected inside the hollow cylinder 2, a piston is fixedly connected to one end of the piston column 3, and the piston is in close contact with the inner wall of the hollow cylinder 2;

[0027] The screw rod 6 is rotatably connected to the inside of the bracket 1, the circumferential thread of the screw rod 6 is connected to the thread block 4, the other end of the piston column 3 is fixedly connected to the thread block 4, and the top of the screw rod 6 is fixedly connected to the gear 10;

[0028] The first motor 5 is fixedly connected to the inside of the bracket 1, and one end of the output shaft of the first motor 5 and the bottom of the screw rod 6 are fixedly connected with a synchronous wheel 11, and a synchronous belt 12 is connected between the two synchronous wheels 11;

[0029] The locking assembly is arranged inside the bracket 1, and the locking assembly is used to limit the position of the piston column 3;

[0030] The locking assembly includes a motor 13, which is fixedly connected to the inside of the bracket 1. One end of the output shaft of the motor 13 is fixedly connected to a bidirectional screw 14, which is rotatably connected to the inside of the bracket 1. The circumferential thread of the bidirectional screw 14 is connected to two connecting columns 15. The two connecting columns 15 are fixedly connected to locking blocks 16 on the sides close to each other. The two locking blocks 16 are meshed with the gear 10.

[0031] A sliding groove 9 is provided on one side of the bracket 1, and the threaded block 4 is slidably connected in the sliding groove 9;

[0032] In the above technical solution, liquid is poured into the empty cylinder 2, and the first motor 5 drives one of the synchronous wheels 11 to rotate, and one of the synchronous wheels 11 drives the other synchronous wheel 11 to rotate through the synchronous belt 12, thereby driving the screw rod 6 to rotate, and the rotation of the screw rod 6 can drive the threaded block 4 to move up and down, and the threaded block 4 drives the piston rod 3 to move in the empty cylinder 2, so as to squeeze out the liquid in the empty cylinder 2;

[0033] When liquid is not needed to flow out, the motor 13 drives the bidirectional screw 14 to rotate, and the bidirectional screw 14 drives the two connecting columns 15 to move. The connecting columns 15 respectively drive the locking blocks 16 to move toward the middle, so that the gear 10 engages with the two locking blocks 16, which is convenient for fixing the screw 6 to prevent it from rotating, and can lock the position of the piston column 3 to prevent excess liquid leakage.

[0034] The present application can be used in the field of medical devices, and can also be used in other fields applicable to the present application.

[0035] Example 2

[0036] refer to Figure 1-Figure 4 , improved on the basis of Example 1:

[0037] A second motor 7 is fixedly connected to the inner wall of the top of the bracket 1, and one end of the output shaft of the second motor 7 is fixedly connected to a valve head 8, and the valve head 8 is fixedly installed with one end of the empty cylinder 2;

[0038] In the above technical solution, the second motor 7 drives the valve head 8 to rotate to control the flow direction of the liquid in the empty cylinder 2. The valve head 8 is standardly configured as 120° 3-port; it can also be customized as 90° 4-port / T-shaped 3-port / no valve, etc., subject to actual conditions.

[0039] refer to Figure 4 The bracket 1 has two guide rails 17 fixedly connected to the inside thereof. The two guide rails 17 are respectively located on both sides of the gear 10, and the connecting posts 15 are respectively slidably connected to the upper surfaces of the guide rails 17;

[0040] In the above technical solution, the guide rail 17 can improve the stability of the connecting column 15 when it moves.

[0041] refer to Figure 1 , the circumference of the piston column 3 is fixedly connected with a cross-shaped reinforcement column;

[0042] In the above technical solution, the cross-shaped reinforcement column can improve the stability of the piston column 3 when it moves.

[0043] However, as is well known to those skilled in the art, the working principles and wiring methods of the first motor 5, the second motor 7 and the motor 13 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A syringe pump with a locking device, characterized in that: include: A bracket (1), a hollow cylinder (2) is mounted on one side of the bracket (1), a piston column (3) is slidably connected to the interior of the hollow cylinder (2), a piston is fixedly connected to one end of the piston column (3), and the piston is in close contact with the inner wall of the hollow cylinder (2); A screw rod (6), the screw rod (6) is rotatably connected to the inside of the bracket (1), the circumferential thread of the screw rod (6) is connected to a thread block (4), the other end of the piston column (3) is fixedly connected to the thread block (4), and the top of the screw rod (6) is fixedly connected to a gear (10); A first motor (5), the first motor (5) being fixedly connected to the inside of the bracket (1), one end of the output shaft of the first motor (5) and the bottom of the screw rod (6) being fixedly connected to a synchronous wheel (11), and a synchronous belt (12) being transmission-connected between the two synchronous wheels (11); A locking assembly is arranged inside the bracket (1) and is used to limit the position of the piston column (3).

2. A syringe pump with a locking device according to claim 1, characterized in that: The locking assembly comprises a motor (13), the motor (13) being fixedly connected to the inside of the bracket (1), one end of the output shaft of the motor (13) being fixedly connected to a bidirectional screw (14), the bidirectional screw (14) being rotatably connected to the inside of the bracket (1), the circumferential thread of the bidirectional screw (14) being connected to two connecting columns (15), the two connecting columns (15) being fixedly connected to one side thereof close to each other with a locking block (16), and the two locking blocks (16) being meshed with the gear (10).

3. A syringe pump with a locking device according to claim 2, characterized in that: A second motor (7) is fixedly connected to the inner wall of the top of the bracket (1); one end of the output shaft of the second motor (7) is fixedly connected to a valve head (8); and the valve head (8) is fixedly mounted on one end of the empty cylinder (2).

4. A syringe pump with a locking device according to claim 3, characterized in that: Two guide rails (17) are fixedly connected inside the bracket (1), and the two guide rails (17) are respectively located on both sides of the gear (10), and the connecting columns (15) are respectively slidably connected on the upper surfaces of the guide rails (17).

5. The syringe pump with a locking device according to claim 4, characterized in that: A sliding groove (9) is provided on one side of the bracket (1), and the threaded block (4) is slidably connected in the sliding groove (9).

6. The syringe pump with a locking device according to claim 1, characterized in that: A cross-shaped reinforcement column is fixedly connected to the circumference of the piston column (3).

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