Reset elastic force regulation and control method of micro-injection auxiliary mechanism

Abstract

The invention discloses a reset elastic force regulation and control method of a micro-injection auxiliary mechanism, relates to a medical instrument parameter regulation and control method, and provides the scheme aiming at the problem that in the prior art, the swinging torque is large. The device is applied to a micro-injection auxiliary mechanism, and the micro-injection auxiliary mechanism comprises a mounting seat and a push block, the mounting seat and the push block are reset through three springs; the midpoint of a connecting line A of axes of the second spring and the third spring corresponds to the center of a push rod of the microsyringe; the first spring is located on the perpendicular bisector of the connecting line. The elastic coefficient k1 of the first spring is smaller than the elastic coefficient k2 of the second spring; the elastic coefficient k2 of the second spring is equal to the elastic coefficient k3 of the third spring. The high-pressure injector has the advantages that the elastic force relation between the first spring and the other two springs is adjusted according to the actual distribution condition of the three springs, the high-pressure injector can be suitable for micro-injection auxiliary mechanisms of different models, and the program precision of the high-pressure injector under the assistance of the micro-injection auxiliary mechanisms of various models can be unified to the maximum extent.

Description

Technical Field

[0001] The present invention relates to a method for regulating medical device parameters, and particularly to a method for regulating the reset elastic force of a micro-injection assisting mechanism. Background Art

[0002] In a patent document "A Micro-Injection Assisting Mechanism for a High-Pressure Syringe", in order to improve the precision of the injection procedure of a high-pressure syringe, the structure shown in Figure 1 is disclosed: A fixed seat 11 is provided, and the fixed seat 11 is used to fixedly install the micro-injection assisting mechanism on the high-pressure syringe. A support column 12 extending vertically upward is fixedly provided on one side of the fixed seat 11. The upper end of the support column 12 is fixedly provided with a mounting seat 13. A first card slot 14 is provided in the middle of the mounting seat 13, and the first card slot 14 is used for the injection cylinder 41 of the micro-syringe to be snapped in and fixed. A supporting seat 16 is fixedly provided at the lower end of the support column 12 at a corresponding position below the mounting seat 13, and the supporting seat 16 is used to support the injection cylinder 41.

[0003] A push block 21 is provided above the mounting seat 13. A second card slot 27 is provided in the middle of the push block 21, and the second card slot 27 is used for the push rod 42 of the micro-syringe to be snapped in and fixed. One end of the push block 21 is fixedly provided with a second guide rod 25 extending vertically downward, and the other end is fixedly provided with a third guide rod 26 extending vertically downward. The second guide rod 25 and the third guide rod 26 respectively penetrate through the mounting seat 13. A second spring 32 is sleeved outside the part of the second guide rod 25 located below the mounting seat 13. The upper end of the second spring 32 is fixedly connected to the lower end surface of the mounting seat 13, and the lower end of the second spring 32 is fixedly connected to the free end of the second guide rod 25. A third spring 33 is sleeved outside the part of the third guide rod 26 located below the mounting seat 13. The upper end of the third spring 33 is fixedly connected to the lower end surface of the mounting seat 13, and the lower end of the third spring 33 is fixedly connected to the free end of the third guide rod 26.

[0004] The mounting seat 13 is provided with an extended first rear extension part 15 above the fixed seat 11. The push block 21 is provided with an extended second rear extension part 22 at a corresponding position of the first rear extension part 15. The second rear extension part 22 is provided with a first guide rod 24 extending vertically downward, and the first guide rod 24 penetrates through the first rear extension part 15. A first spring 31 is sleeved outside the part of the first guide rod 24 located below the first rear extension part 15. The upper end of the first spring 31 is fixedly connected to the lower end surface of the first rear extension part 15, and the lower end of the first spring 31 is fixedly connected to the free end of the first guide rod 24.

[0005] The upper end surface of the push block 21 is provided with a lifting rod 23.

[0006] However, after a period of clinical practice, it was found that the improvement in the precision of the injection program of the high-pressure syringe did not reach the expected level, and the deviation of this structure was relatively obvious in products of different models. After analysis, it was found that based on the general knowledge of those skilled in the art, the elastic coefficients and lengths of the three springs were the same. Since the micro syringe push rod was not located at the center of the isosceles triangle formed by the three springs in the vertical direction, a moment for the swing of the push block 21 occurred, which was caused by the excessive force provided by the first spring 31. Summary of the Invention

[0007] The purpose of the present invention is to provide a method for regulating the reset elastic force of a micro injection auxiliary mechanism to solve the problems existing in the above-mentioned prior art.

[0008] The method for regulating the reset elastic force of a micro injection auxiliary mechanism described in the present invention is applied to a micro injection auxiliary mechanism, and the micro injection auxiliary mechanism includes a mounting seat and a push block; the mounting seat and the push block are reset by three springs.

[0009] Among them, the midpoint of the connection line A of the axes of the second spring and the third spring corresponds to the center of the micro syringe push rod; the first spring is located on the perpendicular bisector of the connection line.

[0010] The elastic coefficient k1 of the first spring is less than the elastic coefficient k2 of the second spring; the elastic coefficient k2 of the second spring is equal to the elastic coefficient k3 of the third spring.

[0011] When the elastic coefficient k2 of the second spring remains unchanged, the length d2 of the connection line A is positively correlated with the elastic coefficient k1.

[0012] The distance d1 between the axis of the first spring and the connection line A is negatively correlated with the elastic coefficient k1.

[0013] The elastic coefficient k1 satisfies the following relationship:

[0014] k1 = (0.0705·d2 - 0.0132·d1)·k;

[0015] Among them, the value range of d1 is 12 - 20 cm, the value range of d2 is 8 - 15 cm, and k = k2 = k3 is a fixed value.

[0016] The method for regulating the reset elastic force of a micro injection auxiliary mechanism described in the present invention has the advantage that according to the actual distribution of the three springs, the elastic force relationship between the first spring and the other two springs is adjusted, which can be adapted to different models of micro injection auxiliary mechanisms, and can maximize the unification of the program precision of the high-pressure syringe assisted by various models of micro injection auxiliary mechanisms. Description of the Drawings

[0017] Figure 1 It is a schematic three - dimensional structure diagram of a micro - injection auxiliary mechanism in the prior art.

[0018] Figure 2 It is a parameter schematic diagram of the reset elastic force regulation method in the present invention.

[0019] Reference numerals:

[0020] 11 - fixed seat, 12 - support pillar, 13 - mounting seat, 14 - first card slot, 15 - first rear extension, 16 - supporting seat;

[0021] 21 - push block, 22 - second rear extension, 23 - lifting rod, 24 - first guide rod, 25 - second guide rod, 26 - third guide rod, 27 - second card slot;

[0022] 31 - first spring, 32 - second spring, 33 - third spring;

[0023] A is the axis connection line of the second spring and the third spring, and d2 is the length of line segment A;

[0024] B is the perpendicular line from the axis of the first spring to line segment A; d1 is the length of line segment B. Detailed implementation manners

[0025] The reset elastic force regulation method in the present invention is applied to a micro - injection auxiliary mechanism as shown in Figure 1 A micro - injection auxiliary mechanism includes a mounting seat and a push block. The mounting seat and the push block are reset by three springs. The regulation parameters of this method are as shown in Figure 2 Among them, the mid - point of the connection line A of the axes of the second spring and the third spring corresponds to the center of the push rod of the micro - syringe. The first spring is located on the perpendicular bisector of the connection line.

[0026] The elastic coefficient k1 of the first spring is less than the elastic coefficient k2 of the second spring. The elastic coefficient k2 of the second spring is equal to the elastic coefficient k3 of the third spring. When the elastic coefficient k2 of the second spring remains unchanged, the length d2 of the connection line A is positively correlated with the elastic coefficient k1. The distance d1 between the axis of the first spring and the connection line A is negatively correlated with the elastic coefficient k1.

[0027] The elastic coefficient k1 satisfies the following relational formula: k1=(0.0705·d2 - 0.0132·d1)·k.

[0028] Among them, the value range of d1 is 12 - 20 cm, the value range of d2 is 8 - 15 cm, and k = k2 = k3 is a fixed value.

[0029] The present invention also provides the following value selection as shown in the following table:

[0030] k1 / k d2 (cm) d1 (cm) 0.4056 8 12 0.4629 9 13 0.5202 10 14 0.5775 11 15 0.6348 12 16 0.6921 13 17 0.7494 14 18 0.8067 15 19 0.7935 15 20 0.3 8 20 0.3837 9 19 0.4674 10 18 0.5511 11 17 0.6348 12 16 0.7185 13 15 0.8022 14 14 0.8859 15 13 0.8991 15 12

[0031] For the micro-injection assisting mechanism of the same model, the second spring and the third spring assembled can be guaranteed to be the same within the same production batch, but it is very difficult to guarantee the same between batches. Therefore, only by controlling the ratio of the first spring to the other two and then testing the elastic coefficient of the second or third spring can a suitable first spring be selected, and precise regulation for various models and batches can be achieved.

[0032] For those skilled in the art, various corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all such changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A method for adjusting the resetting elastic force of a microinjection auxiliary mechanism, which is applied to a microinjection auxiliary mechanism, wherein the microinjection auxiliary mechanism comprises a mounting seat and a push block; the mounting seat and the push block are reset by three springs; in, The midpoint of the line A connecting the axes of the second spring and the third spring corresponds to the center of the micro-injection syringe push rod; the first spring is located on the perpendicular midline of the connecting line; It is characterized in that The elastic coefficient k1 of the first spring is smaller than the elastic coefficient k2 of the second spring; the elastic coefficient k2 of the second spring is equal to the elastic coefficient k3 of the third spring.

2. According to claim 1, a method for controlling the resetting elastic force of a microinjection auxiliary mechanism, characterized in that: When the elastic coefficient k2 of the second spring remains unchanged, the length d2 of the connecting line A is positively correlated with the elastic coefficient k1.

3. A method for controlling the resetting elastic force of a microinjection auxiliary mechanism according to claim 2, characterized in that: The distance d1 between the axis of the first spring and the connecting line A is negatively correlated with the elastic coefficient k1.

4. A method for controlling the resetting elastic force of a microinjection auxiliary mechanism according to claim 3, characterized in that: The elastic coefficient k1 satisfies the following relationship: k1=(0.0705·d2-0.0132·d1)·k; Among them, the value range of d1 is 12 to 20 cm, the value range of d2 is 8 to 15 cm, and k=k2=k3 is a fixed value.

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