Needle-thread connection strength testing device for medical suture

Abstract

The utility model discloses a needle-thread connection strength testing device for a medical suture, which comprises a first support plate, and a second support plate, a third support plate and a fourth support plate which are sequentially arranged in parallel along the central axis direction of the first support plate, stretching mechanisms are rotationally connected between the first supporting plate and the second supporting plate and between the third supporting plate and the fourth supporting plate respectively, each stretching mechanism is rotationally connected with a power output mechanism, one end of each stretching mechanism is provided with a manual clutch mechanism, each stretching mechanism is movably connected with a tension force measuring device, and the tension force measuring device is connected with a power output mechanism. By arranging the manual clutch mechanism, the transmission connection relationship between the first transmission shaft and the first transmission gear is switched, so that the conversion between one-way tensile force application measurement and two-way tensile force application measurement is realized, the detection content is enriched, and the measurement result is ensured to be more accurate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the wire connecting strength test technical field, and specifically relates to needle thread connecting strength testing device of medical suture. BACKGROUND

[0002] The needle thread connecting strength test mainly evaluates the connecting strength and stability between the suture needle and the suture thread, and ensures that the suture thread does not break or loosen during the operation process.

[0003] During the test, the measured tension is applied, and the force value at which the needle thread connection breaks under the action of tension is recorded, so as to detect whether the product meets the design and production standards and ensure the consistency and reliability of the product.

[0004] The existing measuring equipment is expensive, has high purchase cost, has many product electronic components, has high maintenance cost in the later period, and the existing equipment usually adopts a one-way tension measurement method, that is, a one-way tensile force is applied to the test piece to evaluate the strength and ductility of the material, and such equipment cannot measure the test results of the test piece under the action of two-way tensile force. UTILITY MODEL CONTENTS

[0005] The utility model overcomes the defects of the prior art and provides the needle thread connecting strength testing device of medical suture.

[0006] The technical scheme adopted to solve the above technical problems is as follows: the needle thread connecting strength testing device of medical suture is provided, which comprises a first support plate, a second support plate, a third support plate and a fourth support plate are sequentially and parallelly arranged along the central axis direction of the first support plate, the first support plate and the second support plate and the third support plate and the fourth support plate are respectively rotationally connected with a stretching mechanism, the stretching mechanism is rotationally connected with a power output mechanism, one end of the stretching mechanism is provided with a manual clutch mechanism, and the stretching mechanism is movably connected with a tension dynamometer.

[0007] Through the above technical scheme, the needle thread extends in the same axial direction, moves linearly in opposite directions under the pulling of the stretching mechanism, and is disconnected until the needle thread is disconnected, the force value at which the two are disconnected is measured by the tension dynamometer, whether the product meets the design and production standards is judged, the manual clutch mechanism is arranged, the stretching mechanism can be converted from two-way movement stretching to one-way movement stretching, two-way tension measurement and one-way tension measurement are completed, the detection content is enriched, the measurement result is more accurate, and more comprehensive material mechanical property information is provided.

[0008] Further, the stretching mechanism comprises a first transmission rod and a second transmission rod, a thread is formed in the outer wall of the first transmission rod, a first moving block is threadedly connected to the first transmission rod, a first guide rod is arranged in parallel along the radial direction of the first transmission rod, the two ends of the first guide rod are fixedly connected with a first support plate and a second support plate respectively, the first moving block is slidably connected with the first guide rod, a first connecting column is fixedly connected to the top wall of the first moving block, a first threaded connecting rod is fixedly connected to the top wall of the first connecting column, a first rotating cap is threadedly connected to the first threaded connecting rod, one end of the first transmission rod close to the first support plate is rotatably connected with the first support plate, and a first transmission gear is connected to the other end of the first transmission rod close to the second support plate through a manual clutch mechanism.

[0009] Through the above technical scheme, the first transmission rod is rotated, the first moving block is driven through thread transmission, and the first moving block moves linearly reciprocating along the direction of the first transmission rod, the first rotating cap is rotated to fasten the needle and thread to be detected, and thus one-way pulling of the needle and thread is realized.

[0010] Further, the second transmission rod is rotatably connected with a third support plate and a fourth support plate at the two ends respectively, a thread is formed in the outer wall of the second transmission rod, a second moving block is threadedly connected to the second transmission rod, a second guide rod is arranged in parallel along the radial direction of the second transmission rod, the two ends of the second guide rod are fixedly connected with the third support plate and the fourth support plate respectively, the second moving block is slidably connected with the second guide rod, a second connecting column is fixedly connected to the top wall of the second moving block, a second threaded connecting rod is fixedly connected to the top wall of the second connecting column, a second rotating cap is threadedly connected to the second threaded connecting rod, and a second transmission gear is fixedly connected to one end of the second transmission rod close to the third support plate.

[0011] Through the above technical scheme, the second transmission rod is rotated, the second moving block is driven through thread transmission, and the second moving block moves linearly reciprocating along the direction of the second transmission rod, the second rotating cap is rotated to fasten the needle and thread to be detected, and through the cooperation of the first transmission rod and the second transmission rod, two-way pulling of the needle and thread is realized.

[0012] Further, the power output mechanism comprises a motor, a first bevel gear is fixedly connected to the output end of the motor, a third transmission shaft is rotatably connected with the third support plate, a second bevel gear is fixedly connected to one end of the third transmission shaft, the second bevel gear is meshed with the first bevel gear, a third transmission gear is fixedly connected to the other end of the third transmission shaft, the third transmission gear is meshed with the second transmission gear, a fourth transmission gear is rotatably connected with the third transmission gear, a fourth transmission shaft is fixedly connected to one side of the fourth transmission gear close to the third support plate, the fourth transmission shaft is rotatably connected with the third support plate, and the fourth transmission gear is meshed with the first transmission gear.

[0013] Through the technical scheme, the motor is started to drive the first bevel gear to rotate, the second bevel gear starts to rotate and drives the third transmission gear to rotate through the meshing transmission of the first bevel gear and the second bevel gear, the second transmission gear rotates through the meshing of the third transmission gear and the second transmission gear, the second transmission rod is driven to rotate after the second transmission rod rotates, the second moving block starts to move linearly, the fourth transmission gear starts to rotate through the rotary connection relationship of the third transmission gear and the fourth transmission gear, the first transmission gear starts to rotate through the meshing relationship of the fourth transmission gear and the first transmission gear, and then the first transmission rod is driven to rotate, and then the first moving block starts to move linearly along the rod body direction, when the third transmission gear rotates, the first transmission gear and the second transmission gear rotate in opposite directions through the transmission conversion of the fourth transmission gear, so that the first moving block and the second moving block move linearly in opposite directions, and thus the needle thread is stretched in opposite directions.

[0014] Further, the manual clutching mechanism comprises a second connecting rod, one end of the second connecting rod is fixedly connected with the first transmission gear, the other end of the second connecting rod is fixedly connected with a first special-shaped limiting block, a first supporting frame is rotatably connected to the outer wall of the second connecting rod, the side wall of the first supporting frame is fixedly connected with the second supporting plate, the first special-shaped limiting block is correspondingly provided with a second special-shaped limiting block along the axial line direction of the second connecting rod, the first special-shaped limiting block and the second special-shaped limiting block are clamped with each other, the second special-shaped limiting block is fixedly connected with a sliding sleeve, the sliding sleeve is slidably sleeved on the first transmission rod, a limiting groove is formed in the inner side wall of the sliding sleeve, a limiting protrusion is fixedly connected to the outer wall of the first transmission rod, the limiting groove and the limiting protrusion are clamped with each other, the outer wall of the sliding sleeve is fixedly connected with a first limiting ring and a second limiting ring, a spring is arranged between the second limiting ring and the first supporting plate, the spring is sleeved on the first transmission rod, a poking rod is arranged between the first limiting ring and the second limiting ring, the poking rod is movably connected with a supporting base, and the supporting base is fixedly connected with the side wall of the first supporting plate.

[0015] Through the technical scheme, through the clamping connection relationship of the first special-shaped limiting block and the second special-shaped limiting block and the clamping connection relationship between the first transmission rod and the sliding sleeve, when the first transmission gear rotates, the first transmission rod rotates normally, at this time, according to actual use requirements, the rotating knob moves to the direction of the second limiting ring, the sliding sleeve is driven to move along the direction of the first transmission rod through the second limiting ring, at this time, the first special-shaped limiting block and the second special-shaped limiting block are separated, the first transmission rod is disconnected with the first transmission gear, at this time, only the second moving block is in linear motion, thereby one-way tension measurement can be carried out, when the rotating knob is loosened, the sliding sleeve drives the first special-shaped limiting block and the second special-shaped limiting block to be clamped under the elastic force of the spring between the second limiting ring and the first supporting plate, at this time, the first transmission gear can drive the first transmission rod to rotate.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The utility model discloses a power output device can realize that the stretching mechanism does opposite direction linear motion, and the equipment structure is simple and direct perception, and personnel operation is easy, and it is convenient to post maintenance.

[0018] 2. The utility model discloses a manual clutch mechanism, and the transmission connection relationship between the first transmission shaft and the first transmission gear is switched, thereby realizing the change of one-way tension measurement and bidirectional tension measurement, enriching the detection content while ensuring that the measurement result is more accurate. DRAWINGS

[0019] Figure 1 It is the overall structure perspective schematic view of the utility model;

[0020] Figure 2 It is the overall structure side view of the utility model;

[0021] Figure 3 It is the overall structure plan view of the utility model;

[0022] Figure 4 It is the structure schematic view of the manual clutch mechanism of the utility model;

[0023] Figure 5 It is the limiting projection and limiting recess structure schematic view of the utility model.

[0024] Reference numerals: 1. First support plate; 2. Second support plate; 3. Third support plate; 4. Fourth support plate; 5. Tensioning mechanism; 501. First transmission rod; 502. First moving block; 503. First guide rod; 504. First transmission gear; 505. Second transmission rod; 506. Second moving block; 507. Second guide rod; 508. Second transmission gear; 509. First connecting column; 510. First threaded connecting rod; 511. First rotating cap; 512. Second connecting column; 513. Second threaded connecting rod; 514. Second rotating cap; 6. Power output mechanism; 60 1. Motor; 602. First bevel gear; 603. Third drive shaft; 604. Second bevel gear; 605. Fourth drive gear; 606. Third drive gear; 607. Fourth drive shaft; 7. Manual clutch mechanism; 701. Second connecting rod; 702. First irregularly shaped limiting block; 703. First support frame; 704. Second irregularly shaped limiting block; 705. Sliding sleeve; 706. Limiting groove; 707. Limiting protrusion; 708. First limiting ring; 709. Second limiting ring; 710. Actuating rod; 711. Support base; 712. Spring; 8. Tension measuring device. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] like Figures 1-5 As shown, the needle-thread connection strength testing device for medical sutures includes a first support plate 1, and a second support plate 2, a third support plate 3, and a fourth support plate 4 arranged in parallel along the central axis of the first support plate 1. Tensioning mechanisms 5 are rotatably connected between the first support plate 1 and the second support plate 2, and between the third support plate 3 and the fourth support plate 4, respectively. The tensioning mechanism 5 is rotatably connected to a power output mechanism 6. A manual clutch mechanism 7 is provided at one end of the tensioning mechanism 5. A tensile force measuring device 8 is movably connected to the tensioning mechanism 5. The tensile force measuring device 8 is existing technology, which applies tensile force to the device body through connecting rings at both ends to obtain the corresponding measurement value.

[0027] During measurement, the needle and thread extend along the same axis and move in opposite directions under the pull of the tensioning mechanism 5 until the connection between the needle and thread is broken. The force value at the break is measured by the tension measuring device 8 to determine whether the product meets the design and production standards. By setting a manual clutch mechanism 7, the tensioning mechanism 5 can be switched from bidirectional to unidirectional tensioning, thus completing both bidirectional and unidirectional tensile force measurement, enriching the testing content, ensuring more accurate measurement results, and providing more comprehensive information on the mechanical properties of the materials.

[0028] The stretching mechanism 5 comprises a first transmission rod 501 and a second transmission rod 505, the outer wall of the first transmission rod 501 is provided with threads, the first transmission rod 501 is threadedly connected with a first moving block 502, the first transmission rod 501 is provided with a first guide rod 503 in the radial direction, the two ends of the first guide rod 503 are fixedly connected with the first support plate 1 and the second support plate 2 respectively, the first moving block 502 is slidably connected with the first guide rod 503, the top wall of the first moving block 502 is fixedly connected with a first connecting column 509, the top wall of the first connecting column 509 is fixedly connected with a first threaded connecting rod 510, the first threaded connecting rod 510 is threadedly connected with a first rotating cap 511, one end of the first transmission rod 501 close to the first support plate 1 is rotatably connected with the first support plate 1, one end of the first transmission rod 501 close to the second support plate 2 is connected with a first transmission gear 504 through the manual clutch mechanism 7, the first transmission rod 501 rotates, drives the first moving block 502 to make linear reciprocating motion along the direction of the rod body of the first transmission rod 501 through thread transmission, and the needle and thread to be detected are fastened by rotating the first rotating cap 511, so that the needle and thread are pulled in one direction.

[0029] The two ends of the second transmission rod 505 are rotatably connected with the third support plate 3 and the fourth support plate 4 respectively, the outer wall of the second transmission rod 505 is provided with threads, the second transmission rod 505 is threadedly connected with a second moving block 506, the second transmission rod 505 is provided with a second guide rod 507 in the radial direction, the two ends of the second guide rod 507 are fixedly connected with the third support plate 3 and the fourth support plate 4 respectively, the second moving block 506 is slidably connected with the second guide rod 507, the top wall of the second moving block 506 is fixedly connected with a second connecting column 512, the top wall of the second connecting column 512 is fixedly connected with a second threaded connecting rod 513, the second threaded connecting rod 513 is threadedly connected with a second rotating cap 514, one end of the second transmission rod 505 close to the third support plate 3 is fixedly connected with a second transmission gear 508, the second transmission rod 505 rotates, drives the second moving block 506 to make linear reciprocating motion along the direction of the rod body of the second transmission rod 505 through thread transmission, and the needle and thread to be detected are fastened by rotating the second rotating cap 514, and the needle and thread are pulled in two directions through the cooperation of the first transmission rod 501 and the second transmission rod 505.

[0030] The power output mechanism 6 comprises a motor 601, the output end of the motor 601 is fixedly connected with a first bevel gear 602, the third supporting plate 3 is rotationally connected with a third transmission shaft 603, one end of the third transmission shaft 603 is fixedly connected with a second bevel gear 604, the second bevel gear 604 is engaged with the first bevel gear 602, the other end of the third transmission shaft 603 is fixedly connected with a third transmission gear 606, the third transmission gear 606 is engaged with a second transmission gear 508, the third transmission gear 606 is rotationally connected with a fourth transmission gear 605, the fourth transmission gear 605 is fixedly connected with a fourth transmission shaft 607 on the side close to the third supporting plate 3, the fourth transmission shaft 607 is rotationally connected with the third supporting plate 3, the fourth transmission gear 605 is engaged with a first transmission gear 504, the motor 601 is started to drive the first bevel gear 602 to rotate, through the engagement transmission of the first bevel gear 602 and the second bevel gear 604, the second bevel gear 604 starts to rotate and drives the third transmission gear 606 to rotate, through the engagement of the third transmission gear 606 and the second transmission gear 508, the second transmission gear 508 rotates, the second transmission gear 508 rotates to drive the second transmission rod 505 to rotate, after the second transmission rod 505 rotates, the second transmission rod 505 starts to drive the second moving block 506 to move linearly, through the rotationally connected relationship of the third transmission gear 606 and the fourth transmission gear 605, the fourth transmission gear 605 starts to rotate, through the engagement relationship of the fourth transmission gear 605 and the first transmission gear 504, the first transmission gear 504 starts to rotate, and then drives the first transmission rod 501 to rotate, and then the first moving block 502 starts to move linearly along the rod body direction, when the third transmission gear 606 rotates, through the transmission conversion of the fourth transmission gear 605, the first transmission gear 504 and the second transmission gear 508 rotate in opposite directions respectively, so as to realize the opposite linear motion of the first moving block 502 and the second moving block 506, thereby realizing the opposite stretching motion of the needle thread.

[0031] As Figure 4As shown, the manual clutch mechanism 7 comprises a second connecting rod 701, one end of which is fixedly connected with the first transmission gear 504, the other end of which is fixedly connected with a first special-shaped limiting block 702, the outer wall of the second connecting rod 701 is rotatably connected with a first support frame 703, the side wall of the first support frame 703 is fixedly connected with the second support plate 2, the first special-shaped limiting block 702 is correspondingly provided with a second special-shaped limiting block 704 along the axial line direction of the second connecting rod 701, the first special-shaped limiting block 702 and the second special-shaped limiting block 704 are mutually clamped, the second special-shaped limiting block 704 is fixedly connected with a sliding sleeve 705, the sliding sleeve 705 is slidingly sleeved on the first transmission rod 501, the inner side wall of the sliding sleeve 705 is provided with a limiting groove 706, the outer wall of the first transmission rod 501 is fixedly connected with a limiting protrusion 707, the limiting groove 706 and the limiting protrusion 707 are clamped together, the outer wall of the sliding sleeve 705 is fixedly connected with a first limiting ring 708 and a second limiting ring 709, a spring 712 is arranged between the second limiting ring 709 and the first support plate 1, the spring 712 is sleeved on the first transmission rod 501, a push rod 710 is arranged between the first limiting ring 708 and the second limiting ring 709, the push rod 710 is movably connected with a support base 711, the support base 711 is fixedly connected with the side wall of the first support plate 1, through the clamping connection relationship of the first special-shaped limiting block 702 and the second special-shaped limiting block 704 and the clamping connection relationship between the first transmission rod 501 and the sliding sleeve 705, when the first transmission gear 504 rotates, the first transmission rod 501 normally rotates, at this time, according to the actual use requirement, the push rod 710 is rotated and moved to the direction of the second limiting ring 709, the sliding sleeve 705 is moved along the direction of the first transmission rod 501 through the second limiting ring 709, at this time, the first special-shaped limiting block 702 and the second special-shaped limiting block 704 are separated, the first transmission rod 501 is disconnected with the first transmission gear 504, at this time, only the second moving block 506 is in linear motion, thereby one-way tension measurement can be carried out, when the push rod 710 is loosened, the sliding sleeve 705 drives the first special-shaped limiting block 702 and the second special-shaped limiting block 704 to be clamped together under the elastic force of the spring 712 between the second limiting ring 709 and the first support plate 1, at this time, the first transmission gear 504 can drive the first transmission rod 501 to rotate.

[0032] The utility model discloses a first stretch mechanism 5 is fixed to the wire body one end, rotates first rotation cap 511, and the wire body is fixed, and the wire body other end is wound in the connecting ring of one end of tensile force dynamometer 8, and the other end connecting ring of tensile force dynamometer 8 is set up on second screw connecting rod 513, rotates second rotation cap 514, and after fixing tensile force dynamometer 8, starts motor 601, and first moving block 502 and second moving block 506 make opposite direction linear stretching movement respectively, and when needing to carry out unidirectional tension test, only need to rotate the lever 710, and first special-shaped limiting block 702 and second special-shaped limiting block 704 separate, and first transmission rod 501 stop rotating, and the value obtained is the value of unidirectional tension measurement.

[0033] The above merely describes a preferred embodiment of the utility model, and is not intended to limit the scope of protection of the utility model.

Claims

1. A device for testing the needle-thread connection strength of a medical suture, comprising a first support plate (1), characterized in that: Second support plate (2), third support plate (3) and fourth support plate (4) are sequentially arranged in parallel along the direction of the central axis of the first support plate (1), and the first support plate (1) and the second support plate (2) and the third support plate (3) and the fourth support plate (4) are rotatably connected with a stretching mechanism (5), the stretching mechanism (5) is rotatably connected with a power output mechanism (6), one end of the stretching mechanism (5) is provided with a manual clutch mechanism (7), and the stretching mechanism (5) is movably connected with a tension dynamometer (8).

2. The suture needle attachment strength testing device of claim 1, wherein, The stretching mechanism (5) comprises a first transmission rod (501) and a second transmission rod (505), a thread is formed in the outer wall of the first transmission rod (501), the first transmission rod (501) is threadedly connected with a first moving block (502), the first transmission rod (501) is provided with a first guide rod (503) in parallel along the radial direction, the first guide rod (503) is fixedly connected with the first support plate (1) and the second support plate (2) at both ends respectively, the first moving block (502) is slidably connected with the first guide rod (503), the first moving block (502) is fixedly connected with a first connecting column (509) on the top wall, the first connecting column (509) is fixedly connected with a first threaded connecting rod (510) on the top wall, the first threaded connecting rod (510) is threadedly connected with a first rotating cap (511), one end of the first transmission rod (501) close to the first support plate (1) is rotatably connected with the first support plate (1), and the other end of the first transmission rod (501) close to the second support plate (2) is connected with a first transmission gear (504) through the manual clutch mechanism (7).

3. The suture needle attachment strength testing device of claim 2, wherein, The second transmission rod (505) is rotatably connected with the third support plate (3) and the fourth support plate (4) at both ends respectively, a thread is formed in the outer wall of the second transmission rod (505), the second transmission rod (505) is threadedly connected with a second moving block (506), the second transmission rod (505) is provided with a second guide rod (507) in parallel along the radial direction, the second guide rod (507) is fixedly connected with the third support plate (3) and the fourth support plate (4) at both ends respectively, the second moving block (506) is slidably connected with the second guide rod (507), the second moving block (506) is fixedly connected with a second connecting column (512) on the top wall, the second connecting column (512) is fixedly connected with a second threaded connecting rod (513) on the top wall, the second threaded connecting rod (513) is threadedly connected with a second rotating cap (514), and the second transmission rod (505) is fixedly connected with a second transmission gear (508) at one end close to the third support plate (3).

4. The suture needle attachment strength testing device of claim 3, wherein, The power output mechanism (6) comprises a motor (601), the output end of the motor (601) is fixedly connected with a first bevel gear (602), the third supporting plate (3) is rotationally connected with a third transmission shaft (603), one end of the third transmission shaft (603) is fixedly connected with a second bevel gear (604), the second bevel gear (604) is engaged with the first bevel gear (602), the other end of the third transmission shaft (603) is fixedly connected with a third transmission gear (606), the third transmission gear (606) is engaged with the second transmission gear (508), the third transmission gear (606) is rotationally connected with a fourth transmission gear (605), the third transmission gear (606) is engaged with the fourth transmission gear (605), the fourth transmission gear (605) is fixedly connected with a fourth transmission shaft (607) close to one side of the third supporting plate (3), the fourth transmission shaft (607) is rotationally connected with the third supporting plate (3), and the fourth transmission gear (605) is engaged with the first transmission gear (504).

5. The suture needle attachment strength testing device of claim 4, wherein, The manual clutch mechanism (7) comprises a second connecting rod (701), one end of the second connecting rod (701) is fixedly connected with the first transmission gear (504), the other end of the second connecting rod (701) is fixedly connected with a first special-shaped limiting block (702), the outer wall of the second connecting rod (701) is rotationally connected with a first supporting frame (703), the side wall of the first supporting frame (703) is fixedly connected with the second supporting plate (2), the first special-shaped limiting block (702) is correspondingly provided with a second special-shaped limiting block (704) along the axial line direction of the second connecting rod (701), the first special-shaped limiting block (702) and the second special-shaped limiting block (704) are clamped with each other, the second special-shaped limiting block (704) is fixedly connected with a sliding sleeve (705), the sliding sleeve (705) is slidably sleeved on the first transmission rod (501), the inner side wall of the sliding sleeve (705) is provided with a limiting groove (706), the outer wall of the first transmission rod (501) is fixedly connected with a limiting protrusion (707), the limiting groove (706) and the limiting protrusion (707) are clamped with each other, the outer wall of the sliding sleeve (705) is fixedly connected with a first limiting ring (708) and a second limiting ring (709), a spring (712) is arranged between the second limiting ring (709) and the first supporting plate (1), the spring (712) is sleeved on the first transmission rod (501), a pushing rod (710) is arranged between the first limiting ring (708) and the second limiting ring (709), the pushing rod (710) is movably connected with a supporting base (711), and the supporting base (711) is fixedly connected with the side wall of the first supporting plate (1).

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