Mechanical property testing device for magnesium alloy heart stent

Abstract

The utility model relates to the technical field of medical instruments, in particular to a mechanical property testing device of a magnesium alloy heart stent, which comprises a bottom plate, a main body mechanism is fixedly mounted on the bottom plate, an adjusting mechanism is fixed at the top end of the bottom plate, two sliding blocks oppositely slide in the adjusting mechanism, a limiting mechanism is fixed on the sliding blocks, and the limiting mechanism is fixed on the bottom plate. The limiting mechanism comprises a clamping block and fixing rods, the clamping block is fixedly connected to the top end of the sliding block, a groove is formed in the clamping block, a gasket is bonded to the clamping block, the two fixing rods are fixedly installed on the clamping block, the fixing rods are slidably connected with an abutting plate, the abutting plate is sleeved with a telescopic spring, and a pull handle is fixedly connected to the abutting plate. The pull handle is pulled to drive the abutting plate to slide in the fixing rod and extrude the telescopic spring, the heart stent can be clamped to the position between the abutting plate and the clamping block, the abutting plate limits the heart stent, and the heart stent can be prevented from falling off from the clamping block in the testing process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a test device, concretely is a kind of magnesium alloy heart stent's mechanical property testing device, belong to medical instrument technical field. BACKGROUND

[0002] Heart stent is a kind of medical equipment for treating coronary artery stenosis or occlusion, by implanting stent to maintain the opening of blood vessel, improve blood flow. In order to ensure the safety and effectiveness of heart stent, a series of strict detection must be carried out. Fatigue test is a commonly used material mechanical property testing method. By repeated loading and unloading, the fatigue resistance of stent is evaluated, which helps to understand the durability of stent in long-term use, prevent fracture or deformation due to fatigue.

[0003] However, the existing fatigue testing machine when testing heart stent, the two ends of heart stent contact with the clamping block provided on the equipment, the clamping block is usually not provided with the assembly for limiting the stent, when the actuator reciprocates and touches the stent, the stent can fall off from the clamping block, and then it is not conducive to the fatigue test of heart stent. SUMMARY

[0004] The utility model discloses a magnesium alloy heart stent's mechanical property testing device, pull handle, drive the abutment plate to slide in fixed rod and extrude telescopic spring, can be fitted with the heart stent to the part between abutment plate and clamping block, abutment plate limits the heart stent, is favorable to prevent stent from falling off from clamping block in the testing process.

[0005] The utility model discloses a magnesium alloy heart stent's mechanical property testing device through following technical scheme to realize above-mentioned purpose, including bottom plate, the fixed mounting of main body mechanism has on the bottom plate, the top of bottom plate is fixed with adjusting mechanism, two sliding blocks have in the adjusting mechanism opposite directions, the fixed limit mechanism has on the sliding block, the limit mechanism includes clamping block and fixed rod, the top fixed connection of sliding block has clamping block, be equipped with recess on the clamping block, the clamping block is bonded with gasket, two fixed rods are fixedly installed on the clamping block, the sliding connection of fixed rod has abutment plate, the telescopic spring is sleeved on the abutment plate, the fixed connection of abutment plate has pull handle.

[0006] Preferably, the part of the clamping block in contact with the gasket is provided with an arc surface structure, and the telescopic spring is in contact with the fixed rod.

[0007] Preferably, the middle part of the abutment plate is provided with an arc surface structure, and the pull handle is located at the top end of the abutment plate.

[0008] Preferably, the main body mechanism comprises a workbench and a stand, the workbench is fixedly connected to the bottom plate, two stands are fixedly installed on the workbench, a cross beam is fixedly connected to the stands, an actuator is fixedly installed on the cross beam, a sensor is fixedly connected to the actuator, a fixed block is fixedly installed on the sensor, and a resisting block is fixedly connected to the fixed block.

[0009] Preferably, the two stands are symmetrically arranged at the top end of the workbench, and the resisting block is located at the central position on the top of the bottom plate.

[0010] Preferably, the adjusting mechanism comprises a fixed seat and a mounting block, the fixed seat is fixedly connected to the bottom plate, the mounting block is threadedly connected to the fixed seat, a supporting seat is fixedly connected to the mounting block, a rotating block is fixedly installed on the supporting seat, a bidirectional screw rod is fixedly connected to the rotating block, two sliding blocks are threadedly connected to the bidirectional screw rod, a sliding groove is arranged on the supporting seat, and a scale is fixedly installed on the supporting seat.

[0011] Preferably, the sliding groove is slidably provided with a sliding block, and the sliding block is in a T-shaped structure.

[0012] Preferably, the rotating block and the bidirectional screw rod are rotatably connected with the supporting seat, and the rotating block is in a cross-shaped structure.

[0013] Preferably, the threads on the two ends of the bidirectional screw rod are opposite in direction, and the sliding block is slidably connected with the supporting seat.

[0014] Preferably, the mounting block is located at the bottom end of the supporting seat, and the scale is located on the side wall of the supporting seat.

[0015] The utility model discloses a heart stent clamping device, which comprises a main body mechanism, a clamping mechanism and an adjusting mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an overall structure schematic diagram of the utility model;

[0017] Figure 2 It is an overall structure schematic diagram of the utility model; Figure 1 It is an enlarged structure schematic diagram of A part shown in the figure;

[0018] Figure 3 It is the connecting structure schematic view of fixed seat and mounting block of the utility model;

[0019] Figure 4 It is the connecting structure schematic view of fixed rod and abutting plate of the utility model;

[0020] Figure 5 It is the connecting structure schematic view of abutting plate and pull handle of the utility model;

[0021] Figure 6 It is the connecting structure schematic view of stand column and crossbeam of the utility model.

[0022] In the drawing: 1, main body mechanism;101, workbench;102, stand column;103, crossbeam;104, actuator;105, sensor;106, fixed block;107, abutting block;2, bottom plate;3, adjusting mechanism;301, fixed seat;302, support seat;303, sliding groove;304, scale;305, rotating block;306, two-way screw rod;307, mounting block;4, sliding block;5, limiting mechanism;501, clamping block;502, gasket;503, fixed rod;504, abutting plate;505, pull handle;506, extension spring;507, recess. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-6 As shown in the drawing, a kind of magnesium alloy heart support mechanical property testing device, including bottom plate 2, fixedly installed with main body mechanism 1 on the bottom plate 2, the top of the bottom plate 2 is fixed with adjusting mechanism 3, two sliding blocks 4 are slid in the adjusting mechanism 3, limiting mechanism 5 is fixed on the sliding block 4, the limiting mechanism 5 includes clamping block 501 and fixed rod 503, the top of the sliding block 4 is fixedly connected with clamping block 501, recess 507 is equipped on the clamping block 501, gasket 502 is bonded on the clamping block 501, two fixed rods 503 are fixedly installed on the clamping block 501, abutting plate 504 is slidably connected on the fixed rod 503, extension spring 506 is sleeved on the abutting plate 504, pull handle 505 is fixedly connected on the abutting plate 504.

[0025] As a technical optimization scheme of the utility model, the part of the clamping block 501 in contact with the gasket 502 is provided with an arc surface structure, the telescopic spring 506 is in contact with the fixed rod 503, the pull handle 505 drives the sliding of the abutting plate 504, and the abutting plate 504 can extrude the telescopic spring 506.

[0026] As a technical optimization scheme of the utility model, the middle part of the abutting plate 504 is provided with an arc surface structure, and the pull handle 505 is located at the top end of the abutting plate 504; when the abutting plate 504 is reset and in contact with the heart stent, the abutting plate 504 can limit the stent.

[0027] As a technical optimization scheme of the utility model, the main body mechanism 1 comprises a workbench 101 and a stand column 102, the bottom plate 2 is fixedly connected with the workbench 101, two stand columns 102 are fixedly installed on the workbench 101, a cross beam 103 is fixedly connected with the stand column 102, an actuator 104 is fixedly installed on the cross beam 103, a sensor 105 is fixedly connected with the actuator 104, a fixed block 106 is fixedly installed on the sensor 105, and an abutting block 107 is fixedly connected with the fixed block 106; the actuator 104 is started, the fixed block 106 drives the abutting block 107 to abut against the heart stent.

[0028] As a technical optimization scheme of the utility model, the two stand columns 102 are symmetrically arranged at the top end of the workbench 101, and the abutting block 107 is located at the central part of the top of the bottom plate 2; the abutting block 107 reciprocally abuts against the heart stent, and the abutting block 107 can fatigue test the stent.

[0029] As a technical optimization scheme of the utility model, the adjusting mechanism 3 comprises a fixed seat 301 and an installation block 307, the bottom plate 2 is fixedly connected with the fixed seat 301, the fixed seat 301 is screw-connected with the installation block 307, the installation block 307 is fixedly connected with a support seat 302, the support seat 302 is fixedly installed with a rotating block 305, the rotating block 305 is fixedly connected with a bidirectional screw rod 306, two sliding blocks 4 are screw-connected with the bidirectional screw rod 306, the support seat 302 is provided with a sliding groove 303, the support seat 302 is fixedly installed with a scale 304, and the bidirectional screw rod 306 is rotated, so that the two sliding blocks 4 slide towards each other at the sliding groove 303.

[0030] As a technical optimization scheme of the utility model, the sliding groove 303 is slidably installed with the sliding block 4, and the sliding block 4 is provided with a T-shaped structure; when the sliding block 4 slides along the inner wall of the support seat 302, the sliding block 4 can drive the displacement of the clamping block 501.

[0031] As a technical optimization scheme of the utility model, the rotating block 305 and the bidirectional screw rod 306 are rotatably connected with the supporting seat 302, the rotating block 305 is arranged in a cross shape, and rotating the rotating block 305 can drive the bidirectional screw rod 306 to rotate in the supporting seat 302.

[0032] As a technical optimization scheme of the utility model, the threads of the bidirectional screw rod 306 at both ends are opposite in direction, the sliding block 4 is slidably connected with the supporting seat 302, and when the bidirectional screw rod 306 rotates, the sliding block 4 can be driven to displace in the supporting seat 302.

[0033] As a technical optimization scheme of the utility model, the mounting block 307 is located at the bottom end of the supporting seat 302, and the scale 304 is located at the side wall of the supporting seat 302, and the sliding distance of the sliding block 4 can be adjusted through the scale 304.

[0034] When the utility model is in use, first, the operator installs the mounting block 307 with a thread on the top of the fixing seat 301 installed on the bottom plate 2, and the mounting block 307 is fixedly connected to the support seat 302. After the mounting block 307 is fixed, the support seat 302 can be positioned, and then the rotating block 305 is rotated by hand. The rotating block 305 drives the bidirectional screw 306 to rotate in the support seat 302. The bidirectional screw 306 is threadedly connected to two sliders 4. Since the thread directions of the two ends of the bidirectional screw 306 are opposite, the bidirectional screw 306 can be rotated. The driving slider 4 slides in the slide groove 303 provided in the support seat 302. A scale 304 is fixed to the side wall of the support seat 302. The scale 304 can be used to adjust the distance between the two sliders 4. The displacement of the slider 4 can drive the clamping block 501 installed at the top to slide, and then the distance between the two clamping blocks 501 can be adjusted; and then the handle 505 is pulled by hand, which can make the handle 505 drive the plate 504 to slide in the fixed rod 503. The fixed rod 503 is installed at the top of the clamping block 501. 4 is sleeved with a telescopic spring 506. When the plate 504 slides along the inside of the fixed rod 503, the plate 504 can squeeze the telescopic spring 506. When the telescopic spring 506 is in a compressed state, the distance between the plate 504 and the clamping block 501 becomes larger, which makes it easier for the operator to put the heart stent into the groove 507 provided in the clamping block 501. The stent contacts the gasket 502. When the handle 505 is released, the plate 504 is reset under the reaction force of the telescopic spring 506, so that its inner wall contacts the stent, thereby enabling the stent to be clamped. The limit is helpful to prevent the stent from falling out of the clamp 501 due to the squeezing force when the block 107 performs fatigue testing on the heart stent; when resisting the heart stent, the control switch of the actuator 104 installed on the beam 103 is turned on, and the actuator 104 moves back and forth in the direction close to the heart stent, and the fixed block 106 drives the block 107 to resist the heart stent. Since the actuator 104 is also connected to the sensor 105, the setting of the sensor 105 can measure the load on the heart stent and ensure the accuracy of the test data.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0036] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A mechanical properties testing device for a magnesium alloy heart stent, comprising a base plate (2), characterized in that: A main body mechanism (1) is fixedly mounted on the bottom plate (2), an adjustment mechanism (3) is fixed on the top of the bottom plate (2), two sliders (4) are arranged to slide towards each other in the adjustment mechanism (3), a limiting mechanism (5) is fixed on the slider (4), the limiting mechanism (5) comprises a clamping block (501) and a fixing rod (503), the top of the slider (4) is fixedly connected with a clamping block (501), a groove (507) is provided on the clamping block (501), a gasket (502) is adhered to the clamping block (501), two fixing rods (503) are fixedly mounted on the clamping block (501), a support plate (504) is slidably connected to the fixing rod (503), a telescopic spring (506) is sleeved on the support plate (504), and a pull handle (505) is fixedly connected to the support plate (504).

2. The mechanical properties testing device for a magnesium alloy heart stent according to claim 1, characterized in that: The contact portion between the clamping block (501) and the gasket (502) is arranged in an arc surface structure, and the telescopic spring (506) is in contact with the fixing rod (503).

3. The mechanical properties testing device for a magnesium alloy heart stent according to claim 1, characterized in that: The middle portion of the support plate (504) is arranged in an arcuate structure, and the pull handle (505) is located at the top end of the support plate (504).

4. The mechanical properties testing device for a magnesium alloy heart stent according to claim 1, characterized in that: The main body mechanism (1) comprises a workbench (101) and a column (102); the workbench (101) is fixedly connected to the base plate (2); two columns (102) are fixedly mounted on the workbench (101); a crossbeam (103) is fixedly connected to the column (102); an actuator (104) is fixedly mounted on the crossbeam (103); a sensor (105) is fixedly connected to the actuator (104); a fixed block (106) is fixedly mounted on the sensor (105); and a stop block (107) is fixedly connected to the fixed block (106).

5. The mechanical properties testing device for a magnesium alloy heart stent according to claim 4, characterized in that: The two upright posts (102) are symmetrically arranged on the top of the workbench (101), and the stop block (107) is located at the center of the top of the bottom plate (2).

6. The mechanical properties testing device for a magnesium alloy heart stent according to claim 1, characterized in that: The adjusting mechanism (3) comprises a fixed seat (301) and a mounting block (307); the fixed seat (301) is fixedly connected to the bottom plate (2); the mounting block (307) is threadedly connected to the fixed seat (301); the mounting block (307) is fixedly connected to the support seat (302); a rotating block (305) is fixedly mounted on the support seat (302); a bidirectional screw (306) is fixedly connected to the rotating block (305); two sliders (4) are threadedly connected to the bidirectional screw (306); a sliding groove (303) is provided on the support seat (302); and a scale (304) is fixedly mounted on the support seat (302).

7. The mechanical properties testing device for a magnesium alloy heart stent according to claim 6, characterized in that: A slider (4) is slidably mounted on the slide groove (303), and the slider (4) is arranged in a T-shaped structure.

8. The mechanical properties testing device for a magnesium alloy heart stent according to claim 7, characterized in that: The rotating block (305) and the bidirectional screw (306) are both rotatably connected to the support seat (302), and the rotating block (305) is arranged in a "cross" structure.

9. The mechanical properties testing device for a magnesium alloy heart stent according to claim 8, characterized in that: The thread directions of the two ends of the bidirectional screw (306) are opposite, and the slider (4) is slidably connected to the support seat (302).

10. The mechanical properties testing device for a magnesium alloy heart stent according to claim 9, characterized in that: The mounting block (307) is located at the bottom end of the support base (302), and the scale (304) is located on the side wall of the support base (302).

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