A contrast injection device plunger calibration tool

Abstract

The application discloses a kind of contrast injection equipment push rod calibration tool, including contrast injection equipment body, still include: calibration cylinder, be located on contrast injection equipment body, and the push rod is movably connected in calibration cylinder, and the push rod is abutted and connected with calibration piece, and drive piece is arranged between the push rod and calibration cylinder, and the drive piece is used to make push rod and different length calibration piece butt joint;Clamping assembly is located at the top of calibration cylinder, for forming the connection between calibration piece and calibration cylinder, to facilitate push rod to push calibration piece to move, solve the problem that calibration in the prior art is influenced by artificial, needle cylinder, equipment itself machining error and other factors calibration data, realize the purpose that calibration equipment is simple and accurate.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a calibration fixture for a contrast injection device push rod. Background Technology

[0002] Currently, the injection dosage accuracy of contrast injection equipment depends on the position of the moving end of the push rod and the fixed end of the support. However, errors in equipment installation and accessories can greatly affect the relative position of the push rod. At the same time, in order to ensure the seal between the syringe piston and the syringe, soft rubber material is generally used. During use, factors such as temperature and friction coefficient directly affect the dosage accuracy.

[0003] However, during the implementation of the relevant technical solutions, at least the following technical problems were found: The existing method for calibrating the push rod of contrast injection equipment is generally to weigh the drug after aspirating it with a syringe. This method is not only cumbersome, but also susceptible to factors such as human operation, syringe, and processing errors of the equipment itself, which can easily lead to a large deviation in the consistency of the push rod position of the contrast injection equipment, resulting in a large error in the accuracy of the injection dose of the contrast injection equipment. Therefore, we propose a calibration fixture for the push rod of contrast injection equipment. Summary of the Invention

[0004] This application provides a calibration fixture for the plunger of an angiography injection device, which solves the problem in the prior art where calibration data is affected by factors such as human error, syringe error, and processing errors of the equipment itself, and achieves the goal of simple operation and accurate calibration of the calibration device.

[0005] This application provides a calibration fixture for a contrast injection device push rod, including a contrast injection device body and a calibration cylinder disposed on the contrast injection device body. A push rod is movably connected inside the calibration cylinder, and a calibration component is abutted and connected to the push rod. A driving component is provided between the push rod and the calibration cylinder, and the driving component is used to mate the push rod with calibration components of different lengths. A snap-fit ​​assembly is disposed at the top of the calibration cylinder to form a connection between the calibration component and the calibration cylinder, facilitating the push rod to move the calibration component.

[0006] Furthermore, the snap-fit ​​assembly includes a mounting base, which is located on the top of the calibration cylinder. The top of the mounting base has a placement groove that matches the calibration component. A limiting block is fixedly connected to the inner wall of the placement groove at a relative position. A limiting seat is provided at the bottom of the mounting base. The limiting seat has a hollow structure in the middle. The limiting block is located at the bottom of the placement groove and forms a limiting slot with the limiting seat.

[0007] Furthermore, each of the two sets of limiting blocks has a guide surface between its side and the placement groove, and the two sets of guide surfaces are located at both ends of the diameter of the placement groove with the placement groove as the center.

[0008] Furthermore, the driving component includes a power unit mounted on one side of the calibration cylinder, and a driving gear is fixedly connected to the output end of the power unit; a threaded rod is rotatably connected inside the calibration cylinder via a bearing, and a driven gear is fixedly connected to the threaded rod through the outer wall of the calibration cylinder; a push block is threadedly connected to the threaded rod, and the push block contacts the push rod; the driving gear and the driven gear are connected by a gear belt drive.

[0009] Furthermore, the outer wall of the push block is provided with a limiting plate, which matches the inner wall of the calibration cylinder to limit the movement of the block and make it translate.

[0010] Furthermore, the inner wall of the calibration cylinder is provided with ventilation holes for observation.

[0011] The technical solution provided in this application has at least the following technical effects or advantages:

[0012] This application employs a mounting base and a limiting base, enabling the calibration surface of the calibration component to quickly connect with the push rod. By using a moving block to push the push rod to translate on the threaded rod, human error and equipment error can be eliminated, ensuring the consistency of the push rod's position. Therefore, it effectively solves the problems of poor positional accuracy, low precision, and time-consuming and labor-intensive operation of the push rod in existing contrast injection equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure in this application;

[0014] Figure 2 This is a schematic diagram of the overall structure of this application from another angle;

[0015] Figure 3 This is a structural schematic diagram showing the cross-sectional view of the mounting base and the limiting base in this application;

[0016] Figure 4 This is a schematic diagram of the cross-section of the mounting base and the limiting base in this application from another angle.

[0017] Figure 5 This is a schematic diagram of the overall top view of the structure in this application;

[0018] Figure 6 This is a structural schematic diagram of a cross-section of the drive component in this application;

[0019] Figure 7 This is a schematic diagram of the push rod and the 200ML calibration piece in this application;

[0020] Figure 8 This is a schematic diagram of the push rod and the origin calibration component in this application;

[0021] Figure 9This is a schematic diagram of the structure of the 200ML calibration piece in this application;

[0022] Figure 10 This is a schematic diagram of the origin calibration component in this application.

[0023] In the diagram: 100, Contrast injection device body; 10, Calibration cylinder; 20, Push rod; 30, Calibration component; 50, Drive component; 40, Snap-fit ​​assembly; 401, Mounting base; 402, Placement slot; 403, Limiting block; 404, Limiting seat; 405, Limiting bayonet; 406, Guide surface; 501, Driving gear; 502, Threaded rod; 503, Driven gear; 504, Pushing block; 505, Gear belt; 506, Limiting plate; 101, Vent hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To better understand the above technical solution, the following will provide a detailed explanation of the above technical solution in conjunction with the accompanying drawings and specific implementation methods.

[0026] Reference Figures 1-2 and Figures 9-10 A calibration fixture for a contrast injection device push rod includes a contrast injection device body 100 and a calibration cylinder 10 disposed on the contrast injection device body 100. The calibration cylinder 10 is rectangular and hollow inside. A push rod 20 is movably connected inside the calibration cylinder 10. A calibration component 30 is abutted and connected to the push rod 20. A driving component 50 is provided between the push rod 20 and the calibration cylinder 10. The driving component 50 is used to mate the push rod 20 with calibration components 30 of different lengths. A snap-fit ​​assembly 40 is provided at the top of the calibration cylinder 10. The snap-fit ​​assembly 40 is used to form a connection between the calibration component 30 and the calibration cylinder 10, so as to facilitate the push rod 20 to push the calibration component 30 to move.

[0027] When calibration is required, first connect the calibration piece 30 to the snap-fit ​​assembly 40, then adjust the position of the push rod 20 so that it aligns with the calibration surface of the calibration piece 30, thereby recording the data;

[0028] It should be noted that the length of the calibration piece 30 varies, and the length that can be pushed inside the calibration piece 30 is between 0-200ml. The calibration piece 30 is an item with the same shape as an injection syringe, and the push rod 20 extends into the interior of the calibration piece 30 and contacts it.

[0029] Reference Figures 1-5 The snap-fit ​​assembly 40 includes a mounting base 401 located on the top of the calibration cylinder 10, and the top of the mounting base 401 is provided with a placement groove 402 that matches the calibration component 30. A limiting block 403 is fixedly connected to the inner wall of the placement groove 402 at a relative position. A limiting seat 404 is provided at the bottom of the mounting base 401. The limiting seat 404 has a hollow structure in the middle. The limiting block 403 is located at the bottom of the placement groove 402 and forms a limiting slot 405 with the limiting seat 404.

[0030] One side of each of the two sets of limiting blocks 403 is provided with a guide surface 406 between it and the placement groove 402, and the two sets of guide surfaces 406 are arranged at both ends of the diameter of the placement groove 402 with the placement groove 402 as the center.

[0031] The calibration surface of the calibration piece 30 first enters the mounting base 401 through the placement groove 402 and is positioned on top of the limiting base 404. The calibration piece 30 is rotated 90 degrees. At the same time, under the action of the guide surface 406 of the limiting block 403, the calibration piece 30 can smoothly enter the position of the limiting bayonet 405, thereby realizing the connection between the calibration piece 30 and the calibration cylinder 10. Then, the driving member 50 drives the push rod 20 to move, thereby recording data. Calibration pieces 30 of different lengths can be selected for operation, thereby realizing the calibration of the contrast injection device body 100.

[0032] Reference Figures 1-2 and Figures 6-8 The driving component 50 includes a power device mounted on a mounting base 401 on one side of the calibration cylinder 10. The power device is preferably an electric motor. The output end of the power device is fixedly connected to a driving gear 501. A threaded rod 502 is rotatably connected inside the calibration cylinder 10 via a bearing. A driven gear 503 is fixedly connected to the threaded rod 502 through the outer wall of the calibration cylinder 10. A pushing block 504 is threadedly connected to the threaded rod 502. The pushing block 504 contacts the pushing rod 20. The driving gear 501 and the driven gear 503 are connected by a gear belt 505. A limiting plate 506 is provided on the outer wall of the pushing block 504. The limiting plate 506 matches the inner wall of the calibration cylinder 10 to limit the movement of the moving block and make it translate.

[0033] The inner wall of the calibration cylinder 10 is provided with a vent hole 101 for observation, so that the push rod 20 will not generate air pressure when it moves inside the calibration cylinder 10, thus making the movement smoother.

[0034] During calibration, the calibration piece 30 is first connected to the mounting base 401, and the drive gear 501 is driven to rotate by the power device. Through the transmission of the gear belt 505, the driven gear 503 and the threaded rod 502 are rotated, and the movement data can be recorded, thereby realizing the data calibration of the contrast injection equipment.

[0035] refer to Figures 9-10 Furthermore, since the lengths of the calibration pieces 30 are different, the origin position is calibrated first. At this position, the top of the push rod 20 is just in contact with the inner wall of the calibration piece 30. Then, a 200ml calibration piece 30 is replaced. At this time, the power device is started to drive the gear belt 505, which in turn drives the moving block on the threaded rod 502 to push the push rod to move it along the height direction of the calibration cylinder 10 until it can move to the calibration surface of the calibration piece 30, thereby recording the movement data.

[0036] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0037] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A calibration fixture for a contrast injection device push rod, comprising a contrast injection device body (100), and further comprising: A calibration cylinder (10) is provided on the body (100) of the contrast injection device, and a push rod (20) is movably connected inside the calibration cylinder (10). A calibration component (30) is abutted on the push rod (20), and a drive component (50) is provided between the push rod (20) and the calibration cylinder (10). The drive component (50) is used to connect the push rod (20) with calibration components (30) of different lengths. A snap-fit ​​assembly (40) is located on the top of the calibration cylinder (10) to form a connection between the calibration component (30) and the calibration cylinder (10), so that the push rod (20) can push the calibration component (30) to move.

2. A contrast injection device plunger calibration fixture as in claim 1, wherein: The snap-fit ​​assembly (40) includes: Mounting base (401) is located on the top of calibration cylinder (10), and the top of mounting base (401) is provided with a placement groove (402) that matches the calibration component (30). A limiting block (403) is fixedly connected to the inner wall of the placement groove (402) at a relative position. A limiting seat (404) is provided at the bottom of mounting base (401). The limiting seat (404) has a hollow structure in the middle. The limiting block (403) is located at the bottom of the placement groove (402) and forms a limiting bayonet (405) with the limiting seat (404).

3. A contrast injection device plunger calibration fixture as in claim 2, wherein, One side of each of the two sets of limiting blocks (403) is provided with a guide surface (406) between it and the placement groove (402), and the two sets of guide surfaces (406) are arranged at both ends of the diameter of the placement groove (402) with the placement groove (402) as the center.

4. The contrast injection device pusher calibration fixture as described in claim 3, characterized in that, The drive unit (50) includes a power unit with a mounting base (401) on one side of the calibration cylinder (10), and the output end of the power unit is fixedly connected to a drive gear (501); The calibration cylinder (10) is rotatably connected to a threaded rod (502) via a bearing, and the threaded rod (502) is fixedly connected to a driven gear (503) through the outer wall of the calibration cylinder (10). A push block (504) is threadedly connected to the threaded rod (502), and the push block (504) is in contact with the push rod (20). The driving gear (501) and the driven gear (503) are connected by a gear belt (505).

5. The contrast injection device pusher calibration fixture as described in claim 4, characterized in that, The outer wall of the push block (504) is provided with a limiting plate (506), which matches the inner wall of the calibration cylinder (10) to limit the movement of the block and make it translate.

6. The contrast injection device pusher calibration fixture as described in claim 5, characterized in that, The inner wall of the calibration cylinder (10) is provided with a vent hole (101) for observation.

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