Fixing device and detection device for detecting Vickers hardness of medical suture needle

Abstract

The utility model relates to the field of medical instrument detection, in particular to a fixing device and a detection device for detecting the Vickers hardness of a medical suture needle. The fixing device comprises a test platform, a suture needle clamp, a standard block clamp and a horizontal bearing seat, and the detection device is the microhardness tester comprising the fixing device. According to the utility model, the hardness detection standard block and the five medical suture needles to be detected can be simultaneously clamped on the same test platform, so that the repeated clamping time can be greatly reduced. Meanwhile, the suture needle only needs to be positioned for the first time through rotation of the bearing, the suture needle can be quickly switched to the next suture needle only by rotating the platform in the follow-up test, and readjustment and alignment are not needed. And the indentation detection process also adopts a rotary switching mode, so that the tedious step of repeated adjustment is avoided, the overall detection efficiency is obviously improved, and the operation time is obviously saved.

Description

Technical Field

[0001] The utility model relates to the field of medical device detection, and particularly relates to a fixing device and a detection device for detecting the Vickers hardness of medical suture needles. Background Art

[0002] Medical suture needles come in various shapes such as straight, 1 / 2 arc, 3 / 8 arc, and 5 / 8 arc. According to the requirements of the medical suture needle standard "YYT 0043-2016 Medical Suture Needles, the Industry Standard of the People's Republic of China for the Pharmaceutical Industry", the Vickers hardness of the suture needle needs to be measured at three places on the suture needle, and then the hardness is calculated according to the size of the indentation on the hardness tester. Five suture needles are measured each time.

[0003] Currently, ordinary jigs or epoxy resin embedding methods are usually used for the hardness test of medical suture needles, but these two methods have the following disadvantages: For ordinary jigs, only one position can be detected at a time. When changing the detection position, the position of the suture needle and the jig needs to be readjusted. This means that for each test, at least 15 clamping operations are required, which is time-consuming and laborious. For the embedding method, although five suture needles can be embedded at one time, the embedding process is complex. As disclosed in Chinese Patent CN109357925A, with the patent name "A Method for Preparing a Test Specimen for Measuring the Hardness of a Metal Material", it is necessary to embed the needle to be measured into a special mold and then perform steps such as resin embedding, resin curing, grinding, and polishing to complete the fixation of the test object, which requires a significant investment in manpower, time, and material costs. The methods adopted in the prior art all have disadvantages such as long time consumption and low efficiency. Summary of the Utility Model

[0004] To solve the above problems, the utility model provides a fixing device and a detection device for detecting the Vickers hardness of medical suture needles, which are specifically used for detecting the hardness of medical suture needles with a small diameter and bending, and can realize the one-time clamping of five detection needles, and the detection results are fast and reliable. The specific technical solutions are as follows:

[0005] A fixing device suitable for detecting the Vickers hardness of medical suture needles includes a test platform, a suture needle clamp, a standard block clamp, and a horizontal bearing block;

[0006] The horizontal bearing block includes a base and a fixed bearing. Four threaded holes are provided on the base, and the positions of the threaded holes correspond to the mounting holes on the cross mounting platform of the microhardness tester. Four socket head cap screws are provided for matching, and the horizontal bearing block can be fixed to the cross mounting platform; a platform shaft is provided at the bottom of the test platform and is matched with the fixed bearing, so that the test platform can rotate 360° horizontally; the top of the test platform is in a disc shape, and a suture needle clamping area and a standard block clamping area are provided around the test platform. The suture needle clamp and the standard block clamp are fixed to the test platform through wing nuts, and the suture needle and the standard block are clamped and fixed on the test platform.

[0007] Further, there are five suture needle clamping areas. The arc of the suture needle clamping area is the same as that of the suture needle to be measured, and the arc of the suture needle clamping area is concentric with the test platform and has the same radius; the depth of the suture needle clamping area is the same as the thickness of the suture needle to be measured, and after clamping, the suture needle to be measured is level with the test platform.

[0008] Further, one end side of the suture needle clamp has the same arc as the suture needle to be measured, and the other end side is provided with a mounting hole corresponding to the threaded hole on the test platform, and the two are fixed by a wing bolt, and the suture needle is clamped and fixed in the suture needle clamping area of the test platform.

[0009] Further, the depth of the standard block clamping area is the same as the height of the standard block, and after clamping, the standard block is level with the test platform.

[0010] Further, the middle arc of the standard block clamp is the same as the arc of the standard block, and mounting holes are provided on both sides corresponding to the threaded holes on the test platform, and the two are fixed by a wing bolt, and the standard block is clamped and fixed in the standard block clamping area of the test platform.

[0011] The present utility model also provides a detection device for detecting the Vickers hardness of a medical suture needle. The device includes a microhardness tester and the aforementioned fixing device for detecting the Vickers hardness of a medical suture needle. The fixing device is fixed on the cross mounting platform of the microhardness tester by an internal hexagonal bolt, so that the fixing device can move horizontally back and forth, left and right along with the cross mounting platform.

[0012] Advantages of the present utility model: (1) The suture needle clamping area is precisely matched with the shape and size of the suture needle, ensuring that the clamping process will neither cause deformation of the suture needle nor cause stable fixation, effectively avoiding measurement accuracy errors caused by clamping deformation; (2) The hardness tester standard block and five medical suture needles can be synchronously clamped at one time, and the detection object can be switched by rotating the test platform without repeated loading and unloading, significantly improving the detection efficiency; (3) The five suture needle clamping areas with the same center and the same radius ensure that the indentation positions of all suture needles are exactly the same, fundamentally eliminating the deviation problem of test results caused by differences in sampling positions; (4) The clamping structure and detection process greatly improve the measurement speed, can effectively save the working time of operators, and improve the detection efficiency; in addition, the present utility model has good versatility and can be extended and applied to the field of Vickers microhardness detection of various special-shaped needles. Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of a detection device for detecting the Vickers hardness of a medical suture needle;

[0014] Figure 2Schematic structural diagram of a microhardness tester for detecting the Vickers hardness of medical suture needles;

[0015] Figure 3 Schematic structural diagram of a fixing device for detecting the Vickers hardness of medical suture needles;

[0016] Figure 4 is Figure 3 exploded structural view;

[0017] Figure 5 Schematic structural diagram of a test platform.

[0018] Reference numerals:

[0019] 1 - Microhardness tester, 11 - Eyepiece; 12 - Turntable; 13 - Objective lens; 14 - Vickers indenter; 15 - Cross mounting platform; 16 - Lifting handwheel; 17 - Control panel; 2 - Fixing device; 21 - Wing nut; 22 - Standard block clamp; 23 - Suture needle clamp; 24 - Test platform; 25 - Socket head cap screw; 26 - Horizontal bearing block; 241 - Suture needle clamping area; 242 - Threaded hole; 243 - Standard block clamping area; 244 - Test platform shaft; 27 - Hardness tester standard block; 28 - Suture needle. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figure 1 shown, the detection device for detecting the Vickers hardness of medical suture needles in this embodiment is for a 3 / 8 curved needle; the device includes a fixing device 2 and a microhardness tester 1. As Figure 2 shown, the microhardness tester is a conventional microhardness tester in the art, which uses microscopic observation and hardness indentation measurement techniques to measure the hardness of medical suture needles. The functions of its various components are as follows: Eyepiece 11: Observe and locate the item to be measured and collect the measured data; Turntable 12: Can rotate the objective lens and the Vickers indenter to facilitate the operator; Objective lens 13: Magnification when measuring the surface indentation, generally 40x is selected; Vickers indenter 14: Apply an indentation to the sample surface and calculate the hardness by measuring the diagonal of the indentation; Cross mounting platform 15: Can move horizontally forward, backward, left and right to accurately place the object to be measured under the objective lens or the indenter; Lifting handwheel 16: Control the rise or fall of the cross workbench; Control panel 17: Operate the microhardness tester, display the test process, and adjust the light source intensity, etc.

[0022] As Figures 3 - 5 shown, a fixing device applicable to detecting the Vickers hardness of medical suture needles includes a test platform 24, a suture needle clamp 23, a standard block clamp 22, and a horizontal bearing block 26;

[0023] The horizontal bearing block 26 includes a base and a fixed bearing. Four threaded holes are provided on the base, and the positions of the threaded holes correspond to the mounting holes on the cross mounting platform 15 of the microhardness tester. Four hexagon socket head cap screws 25 are provided to fix the horizontal bearing block to the cross mounting platform 15; a test platform shaft 244 is provided at the bottom of the test platform 24 and is matched with the fixed bearing, so that the test platform can rotate 360° horizontally; the top of the test platform 24 is disk-shaped, and a suture needle clamping area 241 and a standard block clamping area 243 are provided around the platform. The suture needle clamp 23 and the standard block clamp 22 are fixed to the test platform 24 through a wing nut 21, and the suture needle 28 and the hardness tester standard block 27 are clamped and fixed on the test platform 24.

[0024] Five suture needle clamping areas 241 are provided. The radian of the suture needle clamping area 241 is the same as that of the suture needle 28 to be measured, and the radian of the suture needle clamping area is concentric with the test platform; the depth of the suture needle clamping area 241 is the same as the thickness of the suture needle to be measured, and after clamping, the suture needle to be measured is horizontal with the test platform.

[0025] One end side radian of the suture needle clamp 23 is the same as that of the suture needle to be measured, and an installation hole is provided on the other end side, which corresponds to the threaded hole 242 on the test platform, and the two are fixed through a wing nut 21 to clamp and fix the suture needle in the suture needle clamping area of the test platform. The depth of the standard block clamping area 243 is the same as the height of the hardness tester standard block 27, and after clamping, the standard block is horizontal with the test platform. The middle radian of the standard block clamp 22 is the same as that of the standard block, and installation holes are provided on both sides, which correspond to the threaded holes on the test platform, and the two are fixed through a wing nut to clamp and fix the standard block in the standard block clamping area of the test platform.

[0026] During use, pick up the test platform 24, insert the test platform shaft 244 into the bushing of the horizontal bearing block 26, and tighten the thread on the bushing to fix the two. The horizontal bearing block 26 is placed on the cross mounting platform 15 of the microhardness tester 1 and fixed with four hexagon socket head cap screws 25. At this time, the fixing device 2 is installed on the microhardness tester 1.

[0027] Before the detection operation, place five suture needles 28 on the five suture needle clamping areas 241 respectively, place them against the radian, and then fix them with the same number of suture needle clamps 23 and wing nuts 21. Place the hardness tester standard block 27 in the standard block clamping area 243, and then fix it with the standard block clamp 22 and wing nut 21.

[0028] Rotate the turntable 12 to turn the objective lens 13 to the front. Rotate the lifting handwheel 16 to slowly raise the test platform 24 to a position close to the objective lens (at 2 mm - 3 mm), move the cross mounting platform 15 left and right and rotate the fixing device 2 to place the hardness tester standard block 27 directly below the objective lens 13.

[0029] Turn on the power of the microhardness tester 1, observe the center of the field of view in the eyepiece 11, and gently rotate the lifting handwheel 16 until the surface image of the hardness tester standard block 27 is clearly observed in the eyepiece 11. At this time, the focusing is completed. Rotate the turntable 12 to place the Vickers indenter 14 directly above the hardness tester standard block 27, and click the start button on the control panel 17 to start the device operation. After the indentation is completed, rotate the objective lens 13 back, observe the diagonal length of the indentation in the eyepiece 11 and record it.

[0030] After measuring the hardness tester standard block 27, rotate the fixing device 2 to move one of the five medical suture needles directly below the objective lens 13. After adjusting the imaging clarity, turn the Vickers indenter 14 to the front and start the program to make an indentation. After the indentation of the first medical suture needle is completed, rotate the fixing device 2, and sequentially rotate the second, third, fourth, and fifth suture needles to the test position for indentation. After the indentation is completed, rotate the objective lens 13 to the front, measure and record the diagonal length of the indentation for each suture needle. This is the measurement of the first position of the medical suture needle.

[0031] Adjust the cross mounting platform 15 left and right to place the second part of the suture needle 28 directly below the front Vickers indenter 14, repeat the above process, and record the number of indentations. Continue to complete the indentations of the third parts of the five suture needles. After all the records are completed, compare the indentations of the hardness tester standard block, calculate the Vickers hardness of each part according to the table lookup method, take the average value, and the detection is completed.

[0032] With this detection device, the hardness tester standard block and five medical suture needles to be tested can be fixed simultaneously, greatly reducing the repeated clamping time. By using the rotation of the bearing, the suture needle only needs to be positioned for the first time, and for subsequent tests, only the platform needs to be rotated to quickly switch to the next one, without the need to re-adjust the alignment. The indentation detection process also uses a rotation switching method, avoiding the cumbersome steps of repeated adjustment, significantly improving the overall detection efficiency and saving the operation time significantly.

[0033] The above has described the preferred embodiments of this patent in detail, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of this patent.

Claims

1. A fixing device for detecting the Vickers hardness of a medical suture needle, characterized in that: It includes a test platform, a suture needle fixture, a standard block fixture and a horizontal bearing seat; the horizontal bearing seat includes a base and a fixed bearing, the base is provided with four threaded holes, the positions of the threaded holes correspond to the mounting holes on the cross mounting platform of the microhardness tester, and four hexagon socket bolts are provided to fix the horizontal bearing seat to the cross mounting platform; a platform shaft is provided at the bottom of the test platform to cooperate with the fixed bearing; the top of the test platform is configured to be disc-shaped, and a suture needle clamping area and a standard block clamping area are provided around the test platform, and the suture needle fixture and the standard block fixture are fixed to the test platform by butterfly bolts.

2. A fixing device for detecting the Vickers hardness of a medical suture needle according to claim 1, characterized in that: There are five suture needle clamping areas, the curvature of the suture needle clamping area is consistent with the curvature of the suture needle to be tested, the curvature of the suture needle clamping area is concentric with the test platform and has the same radius; the depth of the suture needle clamping area is consistent with the thickness of the suture needle to be tested, and after clamping, the suture needle to be tested is consistent in level with the test platform.

3. A fixing device for detecting the Vickers hardness of a medical suture needle according to claim 1, characterized in that: The curvature of one end of the suture needle fixture is consistent with the curvature of the suture needle to be tested, and a mounting hole is provided on the other end, corresponding to the threaded hole on the test platform, and the two are fixed by a butterfly bolt.

4. A fixing device for detecting the Vickers hardness of a medical suture needle according to claim 1, characterized in that: The depth of the standard block clamping area is consistent with the height of the standard block, and after clamping, the standard block is consistent with the test platform in level.

5. A fixing device for detecting the Vickers hardness of a medical suture needle according to claim 1, characterized in that: The curvature of the middle part of the standard block fixture is consistent with that of the standard block, and mounting holes are arranged on both sides, corresponding to the threaded holes on the test platform, and the two are fixed by butterfly bolts.

6. A detection device for detecting the Vickers hardness of a medical suture needle, characterized in that: The microhardness tester comprises a fixing device for detecting the Vickers hardness of a medical suture needle according to any one of claims 1 to 5, wherein the fixing device is fixed on a cross mounting platform of the microhardness tester through hexagon socket bolts.

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