Fixing structure and test fixture

Abstract

The utility model discloses a fixing structure and a test fixture, and belongs to the technical field of artificial heart valve testing, the fixing structure comprises a first supporting piece, a second supporting piece and a fixing piece, a first accommodating groove is formed in the first supporting piece, the first supporting piece is provided with a first opening and a second opening, and the first opening, the first accommodating groove and the second opening are communicated in sequence; a second containing groove is formed in the second supporting piece, and the second supporting piece is installed in the first containing groove and abuts against the bottom wall of the first containing groove. The fixing piece is installed in the first containing groove, and at least part of the fixing piece is used for abutting against the second supporting piece. And the first accommodating groove is communicated with the second accommodating groove. According to the valve fixing structure, the second supporting piece is installed in the first supporting piece, the second supporting piece used for clamping a valve is prevented from making direct contact with the first clamping base and the second clamping base, the material hardness of the second supporting piece does not need to be considered in the aspect of fixing of the second supporting piece, and the second supporting piece of the fixing structure is prevented from being extruded and damaged by the two clamping bases.

Description

Technical Field

[0001] The utility model belongs to the technical field of artificial heart valve testing, and particularly relates to a fixing structure and a testing fixture. Background Art

[0002] According to the requirements of GB 12279-2008 Cardiovascular implants - Heart valves for forward flow and steady state leakage tests of artificial heart valves, the selected equipment is the Dalian Fudisi forward flow and steady state leakage equipment. The equipment loading and testing fixture consists of two seat bodies, and the two seat bodies are locked and fixed by a buckle. The existing equipment cannot directly fix the artificial heart valve test sample. It is necessary to first fix the test sample on a support, and then place the support between the two seat bodies and fix it by a buckle.

[0003] However, when the support is in flexible contact with the valve, the support for the pulsatile flow test is a general support with a small thickness. When the support is in flexible contact with the valve, the two seat bodies clamp the support. Due to the limitation of the locking distance of the seat body buckle, it cannot be directly fixed by the buckle. Moreover, when the hardness of the support is low, the two seat bodies clamp the support, and the support is easily damaged by the extrusion of the seat body. Summary of the Utility Model

[0004] The purpose of the utility model is to improve the problem that the existing fixture is easy to damage when clamping the support, and provide a fixing structure and a testing fixture.

[0005] The technical solutions to achieve the above purpose include the following:

[0006] A fixing structure, comprising:

[0007] A first support, a first accommodation groove is formed in the first support, the first support has a first opening and a second opening, and the first opening, the first accommodation groove, and the second opening are communicated in sequence;

[0008] A second support, a second accommodation groove is formed in the second support, the second support is installed in the first accommodation groove and abuts against the bottom wall of the first accommodation groove;

[0009] And a fixing member, the fixing member is installed in the first accommodation groove, and at least part of the fixing member is used to abut against the second support; wherein, the first accommodation groove is communicated with the second accommodation groove.

[0010] In one embodiment, the first support includes a support body and a plate body, the plate body has a through hole, and the second opening is formed in the plate body. The plate body is installed at the bottom of the support body, and the first accommodation groove is formed between the inner side of the support body and the plate body. The first end of the second support is used to abut against the plate body, and the fixing member is used to abut against the second end of the second support.

[0011] In one embodiment, the second support member has a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface are oppositely arranged, the first abutting surface abuts against the fixing member, and the second abutting surface abuts against the plate body.

[0012] In one embodiment, the inner wall of the first support member has an internal thread, the outer wall of the fixing member has an external thread, and the internal thread is threadedly connected to the external thread.

[0013] In one embodiment, a third receiving groove is formed in the fixing member, and the inner diameter of the third receiving groove is larger than the inner diameter of the second receiving groove.

[0014] In one embodiment, the fixing member has at least two adjusting grooves, and the two adjusting grooves are oppositely arranged.

[0015] In one embodiment, the inner diameter of the first receiving groove is larger than the outer diameter of the second support member, and the outer diameter of the second support member is larger than the diameter of the second opening.

[0016] In one embodiment, at least a part of the second support member is made of an elastic material.

[0017] The present utility model further provides a test fixture, which includes a first clamping seat, a second clamping seat, and the fixing structure as described above. A clamping position is formed between the first clamping seat and the second clamping seat. The fixing structure is installed on the clamping position, and the first clamping seat is used to abut against the first end of the fixing structure, and the second clamping seat is used to abut against the second end of the fixing structure.

[0018] In one embodiment, a first chamber is provided in the first clamping seat, a second chamber is provided in the second clamping seat, and the first chamber, the second receiving groove, the first receiving groove, and the second chamber communicate with each other in sequence.

[0019] The technical solution provided by the present utility model has the following advantages and effects:

[0020] By installing the second support member in the first support member, the second support member is used to sleeved outside the valve, and the valve is fixed in the second receiving groove of the second support member. The fixing member is used to limit the second support member in the first support member. In the clamping and fixing structure, it is avoided that the second support member for clamping the valve directly contacts the first clamping seat and the second clamping seat. In the fixing of the second support member, there is no need to consider the material hardness of the second support member, and it is avoided that the second support member of the fixing structure is damaged by being squeezed by the two clamping seats. Moreover, the first receiving groove communicates with the second receiving groove, so that when the fixing structure is fixed by the two clamping seats, it can also meet the forward flow and steady-state leakage test experiments of the artificial heart valve. Description of the Drawings

[0021] The accompanying drawings here show specific examples of the technical solutions of the present utility model and, together with the specific implementation manners, form a part of the description for explaining the technical solutions, principles and effects of the present utility model.

[0022] Unless otherwise specified or defined, in different accompanying drawings, the same reference numerals represent the same or similar technical features, and for the same or similar technical features, different reference numerals may also be used for representation.

[0023] Figure 1 is a schematic diagram of a fixing structure in an embodiment of the present utility model;

[0024] Figure 2 is an exploded view of a fixing structure in an embodiment of the present utility model Figure 1 ;

[0025] Figure 3 is an exploded view of a fixing structure in an embodiment of the present utility model Figure 2 ;

[0026] Figure 4 is a cross-sectional view of a fixing structure in an embodiment of the present utility model;

[0027] Figure 5 is a schematic diagram of a first support member in an embodiment of the present utility model;

[0028] Figure 6 is a schematic diagram of a second support member in an embodiment of the present utility model;

[0029] Figure 7 is a schematic diagram of a fixing member in an embodiment of the present utility model;

[0030] Figure 8 is a schematic diagram of a test fixture in another embodiment of the present utility model;

[0031] Figure 9 is a cross-sectional view of a test fixture in another embodiment of the present utility model;

[0032] Description of reference numerals:

[0033] 100, fixing structure; 1, first support member; 11, internal thread; 12, first opening; 13, second opening; 14, plate body; 15, support body; 16, first accommodation groove; 2, second support member; 21, first abutting surface; 22, second accommodation groove; 3, fixing member; 31, external thread; 32, third accommodation groove; 33, adjustment groove; 4, valve; 200, test fixture; 5, first clamping seat; 51, first chamber; 6, second clamping seat; 61, second chamber. Specific implementation manners

[0034] For the convenience of understanding the present utility model, the specific embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings of the specification.

[0035] Unless otherwise specified or defined, the "first, second..." used herein is only for distinguishing names and does not represent a specific quantity or order.

[0036] Unless otherwise specified or defined, the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element at the same time; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element at the same time. When an element is considered to be "provided in" another element, it can be directly provided in the other element or there can be an intermediate element at the same time.

[0038] Embodiment 1

[0039] In order to solve the problem that the existing fixture clamping support is easily damaged. As Figures 1 to 7 shown, a fixing structure 100 includes: a first support member 1, a second support member 2, and a fixing member 3. A first receiving groove 16 is formed in the first support member 1. The first support member 1 has a first opening 12 and a second opening 13. The first opening 12, the first receiving groove 16, and the second opening 13 are communicated in sequence; a second receiving groove 22 is formed in the second support member 2. The second support member 2 is installed in the first receiving groove 16 and abuts against the bottom wall of the first receiving groove 16; the fixing member 3 is installed in the first receiving groove 16, and at least part of the fixing member 3 is used to abut against the second support member 2; the first receiving groove 16 is communicated with the second receiving groove 22. By installing the second support member 2 in the first support member 1, the second support member 2 is used to sleeved outside the valve 4 and fix the valve 4 in the second receiving groove 22 of the second support member 2. The fixing member 3 is used to limit the second support member 2 in the first support member 1. On the clamping fixing structure 100, it is avoided that the second support member 2 for clamping the valve 4 directly contacts the first clamping seat 5 and the second clamping seat 6. In the fixing of the second support member 2, there is no need to consider the material hardness of the second support member 2, and it is avoided that the second support member 2 of the fixing structure 100 is damaged by being squeezed by the two clamping seats. Moreover, the first receiving groove 16 is communicated with the second receiving groove 22, so that when the fixing structure 100 is fixed by the two clamping seats, it can also meet the forward flow and steady-state leakage test experiments of the artificial heart valve 4.

[0040] To improve the stability of the second support member 2 within the first support member 1. As Figures 2 to 5 shown, the first support member 1 includes a support body 15 and a plate body 14. The plate body 14 has a through-opening, and a second opening 13 is formed within the plate body 14. The plate body 14 is installed at the bottom of the support body 15. A first receiving groove 16 is formed between the inner side of the support body 15 and the plate body 14. The first end of the second support member 2 is adapted to abut against the plate body 14, and the fixing member 3 is adapted to abut against the second end of the second support member 2. When the second support member 2 is installed within the first support member 1, both ends of the second support member 2 are restricted within the first receiving groove 16 by the plate body 14 and the fixing member 3, improving the stability of the second support member 2 on the first support member 1; when testing is required, the first clamping seat 5 and the second clamping seat 6 can fix the first support member 1. The two ends of the first support member 1 are in contact with the first clamping seat 5 and the second clamping seat 6, avoiding clamping the second support member 2. Such a second support member 2 can be made of an elastic material, enabling the valve 4 to be flexibly connected to the second support member 2, avoiding rigid contact with the valve 4 and preventing damage to the valve 4.

[0041] To further improve the stability of the second support member 2 within the first support member 1. As Figure 2 , Figure 3 , Figure 4 , Figure 6 shown, the second support member 2 has a first abutting surface 21 and a second abutting surface. The first abutting surface 21 and the second abutting surface are arranged opposite to each other. The first abutting surface 21 abuts against the fixing member 3, and the second abutting surface abuts against the plate body 14. By using the plate body 14 and the fixing member 3 of the first support member 1 to restrict the position of the second support member 2 within the first receiving groove 16, when the clamping and fixing structure 100 is clamped, the second support member 2 is prevented from directly receiving the pressure from the first clamping seat 5 and the second clamping seat 6, improving the stability of the second support member 2 within the first support member 1.

[0042] To facilitate the installation and fixation of the valve 4. As Figure 5 and Figure 7 shown, the inner wall of the first support member 1 has an internal thread 11, and the outer wall of the fixing member 3 has an external thread 31. The internal thread 11 is threadedly connected to the external thread 31. After installing the valve 4 within the second receiving groove 22 and then placing the second support member 2 within the first receiving groove 16, after the second support member 2 is in threaded engagement with the first support member 1, the position of the second support member 2 within the first receiving groove 16 is fixed. For installation and disassembly, it is only necessary to screw the second support member 2 into or out of the first support member 1.

[0043] To further improve the installation efficiency of the valve 4. As Figure 4 and Figure 7As shown, a third receiving groove 32 is formed in the fixing member 3, and the inner diameter of the third receiving groove 32 is larger than that of the second receiving groove 22. When installing the fixing member 3, the fixing member 3 is directly sleeved outside the valve 4, and the inner diameter of the second receiving groove 22 matches the outer diameter of the valve 4. Since the inner diameter of the third receiving groove 32 is larger than that of the second receiving groove 22, the valve 4 can pass through the third receiving groove 32 more easily, thus improving the installation efficiency of the valve 4 during assembly.

[0044] To facilitate the installation of the fixing member 3. As Figure 7 shown, the fixing member 3 has at least two adjusting grooves 33, and the two adjusting grooves 33 are arranged oppositely. In this embodiment, the fixing member 3 has four adjusting grooves 33, and the four adjusting grooves 33 are equidistantly distributed along the circumferential direction of the fixing member 3. The four adjusting grooves 33 are used for inserting tools. When the tool rotates, it drives the fixing member 3 to rotate, facilitating the application of force to the fixing member 3 and facilitating the threaded cooperation between the fixing member 3 and the first support member 1.

[0045] To facilitate the installation on the second support member 2 and limit the second support member 2 in the first receiving groove 16. As Figure 1 and Figure 4 shown, the inner diameter of the first receiving groove 16 is larger than the outer diameter of the second support member 2, and the outer diameter of the second support member 2 is larger than the diameter of the second opening 13.

[0046] In addition, at least part of the second support member 2 is made of an elastic material. The second support member 2 can be made of a silicone material. The second support member 2 made of silicone is used for the flexible contact between the second support member 2 and the valve 4, avoiding the valve 4 being damaged by rigid contact extrusion of the second support member 2.

[0047] Embodiment 2

[0048] As Figure 8 and Figure 9 shown, the present utility model also proposes a test fixture 200, including a first clamping seat 5, a second clamping seat 6, and the fixing structure 100 as described above. A clamping position is formed between the first clamping seat 5 and the second clamping seat 6. The fixing structure 100 is installed on the clamping position, and the first clamping seat 5 is used to abut against the first end of the fixing structure 100, and the second clamping seat 6 is used to abut against the second end of the fixing structure 100. The fixing structure 100 is clamped by the first clamping seat 5 and the second clamping seat 6, so that the valve 4 in the fixing structure 100 is located at the clamping position. Applying the fixing structure 100 to the test fixture 200 avoids the rigid contact fixation of the valve 4, avoids the damage of the valve 4 during the test, and improves the stability of the valve 4 in the test fixture 200.

[0049] As Figure 9As shown, the first clamping seat 5 has a first chamber 51, and the second clamping seat 6 has a second chamber 61. The first chamber 51, the second receiving groove 22, the first receiving groove 16, and the second chamber 61 communicate with each other in sequence. After injecting the test liquid into the first chamber 51 and the second chamber 61, then seal the first chamber 51 and the second chamber 61. The test liquid flows in the first chamber 51, the second receiving groove 22, the first receiving groove 16, and the second chamber 61, thereby completing the forward flow and steady-state leakage tests of the valve 4.

[0050] When referring to the drawings, new features that appear are described; in order to avoid repeated reference to the drawings resulting in a less concise description, features that have been described are not referred to in the drawings one by one when the description is clear.

[0051] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solutions of the present invention, and to completely describe the technical solutions, purposes, and effects of the present invention. The purpose is to enable the public to understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the protection scope of the present invention.

[0052] The above embodiments are not an exhaustive list based on the present invention. In addition, there may be multiple other embodiments not listed. Any replacement and improvement made on the basis of not violating the concept of the present invention fall within the protection scope of the present invention.

Claims

1. A fixed structure, characterized in that: include: A first support member, wherein a first receiving groove is formed in the first support member, the first support member has a first opening and a second opening, and the first opening, the first receiving groove, and the second opening are connected in sequence; A second support member, wherein a second receiving groove is formed in the second support member, and the second support member is installed in the first receiving groove and abuts against an inner wall of the first receiving groove; and a fixing member, wherein the fixing member is installed in the first receiving groove, and the fixing member is at least partially used to abut against the second supporting member; wherein the first receiving groove is connected to the second receiving groove.

2. The fixing structure according to claim 1, characterized in that: The first support member includes a support body and a plate body, the plate body has a through opening, and the second opening is formed in the plate body, the plate body is installed on the support body, and the first accommodating groove is formed between the inner side of the support body and the plate body, the first end of the second support member is used to abut against the plate body, and the fixing member is used to abut against the second end of the second support member.

3. The fixing structure according to claim 2, characterized in that: The second supporting member has a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface are arranged opposite to each other, the first abutting surface abuts against the fixing member, and the second abutting surface abuts against the plate body.

4. The fixing structure according to claim 1, characterized in that: The inner wall of the first support member has an internal thread, the outer wall of the fixing member has an external thread, and the internal thread is threadably connected to the external thread.

5. The fixing structure according to claim 4, characterized in that: A third accommodating groove is formed in the fixing member, and the inner diameter of the third accommodating groove is greater than the inner diameter of the second accommodating groove.

6. The fixing structure according to claim 5, characterized in that: The fixing member has at least two adjustment slots, and the two adjustment slots are arranged opposite to each other.

7. The fixing structure according to any one of claims 1 to 6, characterized in that: The inner diameter of the first accommodating groove is larger than the outer diameter of the second supporting member, and the outer diameter of the second supporting member is larger than the diameter of the second opening.

8. The fixing structure according to any one of claims 1 to 6, characterized in that: The second supporting member is at least partially made of elastic material.

9. A test fixture, characterized in that: It includes a first clamping seat, a second clamping seat, and a fixing structure as described in any one of claims 1 to 8, wherein a clamping position is formed between the first clamping seat and the second clamping seat, the fixing structure is installed on the clamping position, and the first clamping seat is used to abut against the first end of the fixing structure, and the second clamping seat is used to abut against the second end of the fixing structure.

10. The test fixture according to claim 9, characterized in that: The first clamping seat has a first chamber therein, the second clamping seat has a second chamber therein, and the first chamber, the second accommodating groove, the first accommodating groove, and the second chamber are sequentially connected.

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