Clamping device applied to nuclear magnetic resonance environment

Abstract

The invention belongs to the technical field of nuclear magnetic resonance testing, and discloses a clamping device applied to a nuclear magnetic resonance environment. The clamping device applied to the nuclear magnetic resonance environment is made of a non-metallic material, and specifically comprises a base assembly, a rotating arm, a cantilever and a mounting piece, the rotating arm is provided with a rotating shaft and is rotatably arranged on the base assembly through the rotating shaft; the cantilever is slidably arranged on the rotating arm in the length direction of the rotating arm and provided with a mounting shaft, and the axis direction of the mounting shaft is perpendicular to the axis direction of the rotating shaft. The installation part is rotatably arranged on the installation shaft, and the to-be-tested part is installed on the installation part. By adjusting the clamping device, the to-be-tested piece can be adjusted to be fixed at various angles, the multi-dimensional motion state of the to-be-tested piece in the surgical operation in the nuclear magnetic resonance environment is comprehensively covered, and the comprehensiveness and authenticity of the test are improved; the clamping device is made of a non-metal material, so that errors and disturbance caused by vibration measurement of the to-be-measured piece due to magnetic field interference are avoided.

Description

Technical Field

[0001] The present invention relates to the field of nuclear magnetic resonance testing technology, and in particular to a clamping device used in a nuclear magnetic resonance environment. Background Art

[0002] When performing surgical operations in the complex environment of a nuclear magnetic resonance (MRI), the instruments used for the surgery may produce unexpected vibrations. For example, when using a puncture needle to perform delicate surgeries such as cranial surgery in a MRI environment, the MRI environment may cause the puncture needle to vibrate, which in turn directly poses certain safety risks to the patient. Therefore, it is necessary to perform vibration tests on surgical instruments in a MRI environment to quantify the vibration of the surgical instruments. During the test, a clamping device is required to clamp the surgical instruments, and the position and posture of the surgical instruments can be adjusted by adjusting the clamping device to test the vibration of the surgical instruments in different positions or states.

[0003] The clamping devices in the existing technology are often limited to horizontal position adjustment, which limits the comprehensiveness and authenticity of the test and cannot fully simulate the multi-dimensional movement state of surgical instruments in actual operations; and most clamping devices are made of metal materials, which are prone to magnetic field interference in the MRI environment, which not only affects the imaging quality of MRI, but may also introduce unnecessary errors and disturbances to the vibration measurement of surgical instruments, thereby reducing the accuracy and reliability of the test results.

[0004] Therefore, it is necessary to provide a clamping device for use in a nuclear magnetic resonance environment to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a clamping device for use in a nuclear magnetic resonance environment. By adjusting the clamping device, the workpiece to be tested can be fixed at various angles, which can fully cover the multi-dimensional motion states that the workpiece to be tested may encounter in actual operation, thereby improving the comprehensiveness and authenticity of the test; this clamping device is made of non-metallic material, avoiding errors and disturbances in the vibration measurement of the workpiece to be tested caused by magnetic field interference.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A clamping device for use in a nuclear magnetic resonance environment, wherein the clamping device for use in a nuclear magnetic resonance environment is made of a non-metallic material and comprises:

[0008] Base assembly;

[0009] a rotating arm, the rotating arm having a rotating shaft, the rotating arm being rotatably disposed on the base assembly via the rotating shaft;

[0010] a cantilever, the cantilever being slidably disposed on the rotating arm along the length direction of the rotating arm, the cantilever having a mounting shaft, the axial direction of the mounting shaft being perpendicular to the axial direction of the rotating shaft;

[0011] The mounting member is rotatably arranged on the mounting shaft, and the piece to be tested is mounted on the mounting member.

[0012] Preferably, the base assembly comprises:

[0013] Base body;

[0014] The bracket is arranged at an angle with the base body, and the rotating arm is rotatably arranged on the bracket through the rotating shaft.

[0015] Preferably, a first scale plate is provided on the surface of the rotating arm, the center of the first scale plate coincides with the axis of the rotating shaft, and a first indicator line is provided on the bracket, and the first indicator line and the first scale plate are used together to mark the rotation angle of the rotating arm.

[0016] Preferably, the clamping device used in a nuclear magnetic resonance environment further comprises:

[0017] A first fastener is used to limit the rotation of the rotating arm.

[0018] Preferably, the rotating shaft passes through the bracket, and a portion of the rotating shaft outside the bracket is provided with a first threaded section, and the first fastener can be connected in cooperation with the first threaded section.

[0019] Preferably, the rotating arm is provided with a slide groove along its length direction, and one end of the cantilever is slidably disposed in the slide groove.

[0020] Preferably, the rotating arm is provided with an indicating scale, and the indicating scale is distributed along the sliding groove.

[0021] Preferably, the clamping device used in a nuclear magnetic resonance environment further comprises:

[0022] A second fastening assembly is used to limit the relative displacement between the cantilever and the rotating arm.

[0023] Preferably, the cantilever includes two oppositely arranged clamping parts, the mounting shaft passes through the two clamping parts and is fixedly connected to one of the clamping parts, the mounting member is located between the two clamping parts, and the third fastener can drive the two clamping parts closer to each other to limit the rotation of the mounting member.

[0024] Preferably, a second dial is provided on the clamping portion to which the mounting shaft is fixed, the center of the second dial coincides with the axis of the mounting shaft, and a second indicator line is provided on the mounting member, the second indicator line and the second dial are used together to indicate the rotation angle of the mounting member.

[0025] Beneficial effects of the present invention:

[0026] This clamping device used in a nuclear magnetic resonance environment is made of non-metallic material, and specifically includes a base assembly, a rotating arm, a cantilever and a mounting piece; the rotating arm has a rotating shaft, and the rotating arm is rotatably set on the base assembly through the rotating shaft; the cantilever is slidably set on the rotating arm along the length direction of the rotating arm, and the cantilever has a mounting shaft, and the axial direction of the mounting shaft is perpendicular to the axial direction of the rotating shaft; the mounting piece is rotatably set on the mounting shaft, and the test piece is mounted on the mounting piece.

[0027] The rotating arm is rotatably arranged on the base assembly through a rotating shaft, that is, the rotating arm can rotate around the axis of the rotating shaft, and the cantilever can move along the length direction of the rotating arm. The mounting part is rotatably arranged on the cantilever through the mounting shaft, that is, the mounting part can rotate around the axis of the mounting shaft, and the axis direction of the rotating shaft is perpendicular to the axis direction of the mounting shaft, so that the test piece can be adjusted to be fixed at a variety of angles by adjusting the clamping device, which can fully cover the multi-dimensional motion states that the test piece may encounter in actual operation, thereby more comprehensively simulating the multi-dimensional motion states in actual operation, and improving the comprehensiveness and authenticity of the test; this clamping device is made of non-metallic material, which effectively eliminates the magnetic field interference that may be generated by metal materials in the nuclear magnetic resonance environment, ensures the clarity and accuracy of nuclear magnetic resonance imaging, and also avoids errors and disturbances in the vibration measurement of the test piece caused by magnetic field interference, significantly improving the reliability and accuracy of the test results; this clamping device has a compact structural design and is easy to operate, which not only improves the test effect, but also reduces the difficulty of operation, making the test process smoother and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a clamping device provided by the present invention for use in a nuclear magnetic resonance environment and placed on a nuclear magnetic resonance bed;

[0029] Figure 2 This is a schematic structural diagram of a clamping device provided by the present invention for use in a nuclear magnetic resonance environment;

[0030] Figure 3 It is a structural schematic diagram of the cantilever, the mounting member, the piece to be tested and the second fastening assembly provided by the present invention;

[0031] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0032] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle.

[0033] In the picture:

[0034] 100, test piece; 200, MRI bed;

[0035] 1. Base assembly; 11. Base body; 12. Bracket;

[0036] 2. Rotating arm; 21. Rotating shaft; 22. Slideway;

[0037] 3. Cantilever; 31. Mounting shaft; 32. Clamping portion; 33. Fixing portion; 331. Groove;

[0038] 4. Mounting parts;

[0039] 51. First scale plate; 52. Indicator scale; 53. Second scale plate;

[0040] 61. First indicator line; 62. Second indicator line;

[0041] 71. First fastener; 72. Second fastening assembly; 721. Fixing seat; 7211. Protrusion; 722. Second fastener. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0043] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0046] In the prior art, the clamping devices used to test the vibration of surgical instruments in a nuclear magnetic resonance environment are often limited to horizontal position adjustment, which limits the comprehensiveness and authenticity of the test and cannot fully simulate the multi-dimensional motion state of surgical instruments in actual operations; and most clamping devices are made of metal materials, which are prone to magnetic field interference in a nuclear magnetic resonance environment, which not only affects the imaging quality of the nuclear magnetic resonance, but may also introduce unnecessary errors and disturbances to the vibration measurement of the test piece, thereby reducing the accuracy and reliability of the test results.

[0047] In order to solve the above problems, Figure 1-Figure 5 As shown, this embodiment provides a clamping device (hereinafter referred to as the clamping device) for use in a nuclear magnetic resonance environment. The clamping device is made of non-metallic material, and specifically includes a base assembly 1, a rotating arm 2, a cantilever 3 and a mounting member 4; the rotating arm 2 has a rotating shaft 21, and the rotating arm 2 is rotatably arranged on the base assembly 1 through the rotating shaft 21; the cantilever 3 is slidably arranged on the rotating arm 2 along the length direction of the rotating arm 2, and the cantilever 3 has a mounting shaft 31, and the axial direction of the mounting shaft 31 is perpendicular to the axial direction of the rotating shaft 21; the mounting member 4 is rotatably arranged on the mounting shaft 31, and the test piece 100 is mounted on the mounting member 4.

[0048] The rotating arm 2 is rotatably provided on the base assembly 1 through the rotating shaft 21, that is, the rotating arm 2 can rotate around the axis direction of the rotating shaft 21, and the cantilever 3 can move along the length direction of the rotating arm 2. The mounting member 4 is rotatably provided on the cantilever 3 through the mounting shaft 31, that is, the mounting member 4 can rotate around the axis direction of the mounting shaft 31, and the axis direction of the rotating shaft 21 is perpendicular to the axis direction of the mounting shaft 31, so that the test piece 100 can be adjusted to be fixed at various angles by adjusting the clamping device, which can fully cover the multi-dimensional motion states that the test piece 100 may encounter in actual operation, thereby better It fully simulates the multi-dimensional motion state in actual operation, improving the comprehensiveness and authenticity of the test; this clamping device is made of non-metallic materials, which effectively eliminates the magnetic field interference that may be generated by metal materials in the nuclear magnetic resonance environment, ensuring the clarity and accuracy of nuclear magnetic resonance imaging, while also avoiding errors and disturbances in the vibration measurement of the test piece 100 caused by magnetic field interference, significantly improving the reliability and accuracy of the test results; this clamping device has a compact structural design and is easy to operate, which not only improves the test effect, but also reduces the difficulty of operation, making the test process smoother and more efficient.

[0049] like Figure 1 As shown, during the test, the clamping device is fixedly placed on the MRI bed 200 and is located at the center of the width direction of the MRI bed 200, and the axis of the rotating shaft 21 coincides with the center of the device.

[0050] It should be noted that the test pieces are various surgical instruments that need to be tested in a nuclear magnetic resonance environment, such as puncture needles, etc., and this embodiment does not limit this.

[0051] In this embodiment, the clamping device is made of polyetheretherketone (PEEK), which has high mechanical strength, wear resistance, and fatigue resistance. In other embodiments, the clamping device is made of polyoxymethylene (POM). It should be noted that the specific material of the clamping device depends on actual needs and is not limited in this embodiment.

[0052] Specifically, if Figure 2 As shown, the base assembly 1 includes a base body 11 and a bracket 12. The bracket 12 is arranged at an angle to the base body 11, and the rotating arm 2 is rotatably arranged on the bracket 12 through a rotating shaft 21. In this embodiment, the bracket 12 is 90° to the base body 11, that is, the bracket 12 is arranged perpendicular to the base body 11. In some embodiments, the bracket 12 and the base body 11 are integrally formed. In this embodiment, the bracket 12 and the base body 11 are separately formed and then assembled into one. It should be noted that the specific molding method of the base assembly 1 depends on actual needs and is not limited in this embodiment.

[0053] In this embodiment, the rotating shaft 21 and the rotating arm 2 are provided as separate parts. One end of the rotating shaft 21 has a regular hexagon. The rotating arm 2 is provided with a regular hexagonal through-hole that matches the regular hexagon. The regular hexagon can be inserted into the regular hexagonal through-hole to securely connect the rotating shaft 21 to the rotating arm 2. In other embodiments, the rotating shaft 21 and the rotating arm 2 are integrally formed. It should be noted that the specific molding method of the rotating shaft 21 and the rotating arm 2 depends on actual needs and is not limited in this embodiment.

[0054] Specifically, if Figure 2 As shown, the surface of the rotating arm 2 is provided with a first scale plate 51, the center of which coincides with the axis of the rotating shaft 21. A first indicator line 61 is provided on the bracket 12. The first indicator line 61 and the first scale plate 51 cooperate to indicate the rotation angle of the rotating arm 2. The center of the first scale plate 51 coincides with the axis of the rotating shaft 21, ensuring that the first scale plate 51 rotates synchronously with the rotation of the rotating arm 2. The first indicator line 61 on the bracket 12 serves as a fixed reference point. When the rotating arm 2 rotates, the first indicator line 61 points to different scale marks on the first scale plate 51, thereby indicating the current rotation angle of the rotating arm 2, improving operational efficiency and convenience.

[0055] Specifically, the clamping device further includes a first fastener 71, which is used to limit the rotation of the rotating arm 2. After the rotating arm 2 is rotated to the angle required for testing, the first fastener 71 is used to secure the rotating arm 2 to limit its rotation, allowing the test piece 100 to maintain this angle for subsequent testing.

[0056] In this embodiment, if Figure 2 As shown, the rotating shaft 21 passes through the bracket 12. The portion of the shaft located outside the bracket 12 is provided with a first threaded section, which is engaged with a first fastener 71. Tightening the first fastener 71 generates a compressive force, thereby compressing and securing the rotating arm 2, restricting further rotation. Loosening the first fastener 71 releases the restriction. This design offers a simple structure, easy operation, and high reliability. In this embodiment, the first fastener 71 is a rotating fastening cover.

[0057] Specifically, if Figure 2 As shown, the rotating arm 2 has a slot 22 along its length. One end of the cantilever 3 is slidably disposed within the slot 22, allowing the cantilever 3 to be easily adjusted according to specific needs, thereby enhancing the flexibility and adaptability of the clamping device. The slot 22 also guides the movement of the cantilever 3, ensuring that the cantilever 3 can only slide along the length of the rotating arm 2.

[0058] In this embodiment, if Figure 2As shown, the rotating arm 2 is provided with an indicator scale 52, which is distributed along the chute 22. The current position of the cantilever 3 in the chute 22 can be accurately obtained by directly reading the value on the indicator scale 52. The position of the cantilever 3 can also be precisely adjusted according to the indication of the indicator scale 52 to meet the test requirements.

[0059] Specifically, the clamping device also includes a second fastening assembly 72, which is used to limit the relative displacement of the cantilever 3 and the rotating arm 2. After the cantilever 3 is moved to the desired test position, the second fastening assembly 72 is used to secure the cantilever 3 to limit its movement, allowing the test piece 100 to maintain this position for subsequent testing.

[0060] In this embodiment, if Figure 2 、 Figure 4 As shown, the second fastening assembly 72 includes a fixing seat 721 and a second fastening piece 722. A fixing portion 33 is protruded from one end of the cantilever 3. The fixing portion 33 is located in the slide groove 22, and the cantilever 3 and the rotating arm 2 can abut against each other. A groove 331 is provided on the fixing portion 33, and a protrusion 7211 is protruded from the fixing seat 721. The protrusion 7211 is fitted into the groove 331. The second fastening piece 722 passes through the fixing seat 721 and the fixing portion 33 and is threadedly connected to the two. Tightening the second fastening piece 722 to generate a clamping force makes the fixing seat 721 and the cantilever 3 fit tightly with the rotating arm 2, thereby fixing the position of the cantilever 3 to prevent it from continuing to slide. The fixation can be released by loosening the second fastening piece 722, so that the cantilever 3 can continue to slide.

[0061] Specifically, if Figure 2 、 Figure 5 As shown, the cantilever 3 includes two oppositely disposed clamping portions 32. The mounting shaft 31 is provided through the two clamping portions 32 and is fixedly connected to one of the clamping portions 32. The mounting member 4 is located between the two clamping portions 32. The third fastener can drive the two clamping portions 32 toward each other to restrict the rotation of the mounting member 4. Specifically, one end of the mounting shaft 31 has a regular hexagon. One of the clamping portions 32 is provided with a regular hexagonal through-hole that cooperates with the regular hexagon. The regular hexagon can be inserted into the regular hexagonal through-hole to securely connect the mounting shaft 31 to the clamping portion 32. The mounting shaft 31 passes through the mounting member 4 and the other clamping portion 32. A portion of the mounting shaft 31 protrudes from the other clamping portion 32. The protruding portion of the mounting shaft 31 is provided with a second threaded section. The third fastener is engaged with the second threaded section. By tightening the third fastener to generate a driving force, the two clamping portions 32 are driven toward each other to clamp and secure the mounting member 4, thereby restricting its further rotation. The restriction can be released by loosening the third fastener. The fastening mechanism has a simple structure, is easy to operate, and has high reliability. In this embodiment, the third fastening member is a bolt.

[0062] Specifically, if Figure 2 、 Figure 5 As shown, a second scale plate 53 is provided on the clamping portion 32 to which the mounting shaft 31 is fixed. The center of the second scale plate 53 coincides with the axis of the mounting shaft 31. A second indicator line 62 is provided on the mounting member 4. The second indicator line 62 and the second scale plate 53 cooperate to indicate the rotation angle of the mounting member 4. The second indicator line 62 on the mounting member 4 serves as a reference point. When the mounting member 4 rotates, the second indicator line 62 points to different scale marks on the second scale plate 53, thereby indicating the current rotation angle of the mounting member 4, improving operational efficiency and convenience.

[0063] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A clamping device used in a nuclear magnetic resonance environment, characterized in that: The clamping device used in a nuclear magnetic resonance environment is made of a non-metallic material, and the clamping device used in a nuclear magnetic resonance environment includes: Base assembly (1); A rotating arm (2), the rotating arm (2) having a rotating shaft (21), the rotating arm (2) being rotatably arranged on the base assembly (1) via the rotating shaft (21); a cantilever (3), the cantilever (3) being slidably arranged on the rotating arm (2) along the length direction of the rotating arm (2), the cantilever (3) having a mounting shaft (31), the axial direction of the mounting shaft (31) being perpendicular to the axial direction of the rotating shaft (21); The mounting member (4) is rotatably arranged on the mounting shaft (31), and the test piece (100) is mounted on the mounting member (4).

2. The clamping device used in a nuclear magnetic resonance environment according to claim 1, characterized in that: The base assembly (1) comprises: Base body (11); A bracket (12), wherein the bracket (12) and the base body (11) are arranged at an angle, and the rotating arm (2) is rotatably arranged on the bracket (12) via the rotating shaft (21).

3. The clamping device used in a nuclear magnetic resonance environment according to claim 2 is characterized in that: A first scale plate (51) is provided on the surface of the rotating arm (2), the center of the circle of the first scale plate (51) coincides with the axis of the rotating shaft (21), a first indicator line (61) is provided on the bracket (12), and the first indicator line (61) and the first scale plate (51) cooperate to mark the rotation angle of the rotating arm (2).

4. The clamping device used in a nuclear magnetic resonance environment according to claim 2, characterized in that: The clamping device used in a nuclear magnetic resonance environment also includes: A first fastener (71), wherein the first fastener (71) is used to limit the rotation of the rotating arm (2).

5. The clamping device used in a nuclear magnetic resonance environment according to claim 4 is characterized in that: The rotating shaft (21) passes through the bracket (12); a portion of the rotating shaft (21) located outside the bracket (12) is provided with a first threaded section; and the first fastener (71) can be matched and connected with the first threaded section.

6. The clamping device for use in a nuclear magnetic resonance environment according to claim 1, characterized in that: The rotating arm (2) is provided with a slide groove (22) along its length direction, and one end of the cantilever (3) is slidably arranged in the slide groove (22).

7. The clamping device used in a nuclear magnetic resonance environment according to claim 6, characterized in that: The rotating arm (2) is provided with an indicating scale (52), and the indicating scale (52) is distributed along the sliding groove (22).

8. The clamping device for use in a nuclear magnetic resonance environment according to claim 6, characterized in that: The clamping device used in a nuclear magnetic resonance environment also includes: A second fastening assembly (72), wherein the second fastening assembly (72) is used to limit the relative displacement between the cantilever (3) and the rotating arm (2).

9. The clamping device used in a nuclear magnetic resonance environment according to claim 1, characterized in that: The cantilever (3) comprises two clamping parts (32) arranged opposite to each other, the mounting shaft (31) passes through the two clamping parts (32) and is fixedly connected to one of the clamping parts (32), the mounting member (4) is located between the two clamping parts (32), and the third fastener can drive the two clamping parts (32) to approach each other to limit the rotation of the mounting member (4).

10. The clamping device used in a nuclear magnetic resonance environment according to claim 9, characterized in that: A second scale plate (53) is provided on the clamping portion (32) to which the mounting shaft (31) is fixed, the center of the second scale plate (53) coincides with the axis of the mounting shaft (31), and a second indicator line (62) is provided on the mounting member (4), the second indicator line (62) and the second scale plate (53) cooperate to mark the rotation angle of the mounting member (4).

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