A clamping tool for spine biomechanics experiment

Abstract

The utility model discloses a kind of clamping tool for spinal biomechanics experiment, it is related to spinal analysis technical field.The clamping tool for spinal biomechanics experiment includes clamping seat, hinged ball, support seat;One end of clamping seat is equipped with clamping part, and clamping seat is fixed by clamping part to spinal specimen;Hinged ball and the end face of clamping seat away from clamping part are connected by connecting rod assembly connection;Support seat is installed on experiment table top, and support seat is equipped with the hinged slot corresponding with hinged ball, and hinged ball is installed in hinged slot;Locking piece is equipped on support seat, and locking piece is used to limit the relative position between hinged ball and hinged slot;The clamping tool for spinal biomechanics experiment provided by the utility model, clamping seat is connected by hinged ball and support seat assembly, and it is convenient to adjust the clamping direction of spinal specimen without releasing the clamping of spinal specimen, ensure the mechanical experiment of multiple directions of spinal specimen, improve experimental efficiency.

Description

Technical Field

[0001] This utility model relates to the field of spinal analysis technology, and in particular to a clamping fixture for spinal biomechanical experiments. Background Technology

[0002] Spinal biomechanical experiments, as a crucial means of in-depth exploration of the mechanical properties of the spine, occupy a key position in medical research, bioengineering, and related fields. They are frequently used to study the mechanical responses of vertebral bodies, intervertebral discs, or motion segments under different loading conditions. The vertebral bodies, as the supporting structure of the spine, directly affect its stability and load-bearing capacity; intervertebral discs act as "buffers" for the spine, exhibiting unique mechanical changes under different loading conditions; and motion segments encompass combinations of multiple vertebral bodies and intervertebral discs. Studying their mechanical responses under different loading conditions provides a more comprehensive understanding of the overall motion and stress mechanisms of the spine. These studies can provide important theoretical basis and practical guidance for the diagnosis, treatment, and rehabilitation of spinal diseases.

[0003] In the entire process of spinal biomechanics experiments, specimen clamping and fixation are crucial, as they are key factors affecting data repeatability and reliability. The effectiveness of specimen clamping and fixation directly determines the accuracy and stability of the force transmission during the experiment. Improper clamping and fixation may cause the specimen to wobble or shift under force, preventing the applied force from acting as expected and leading to deviations in the experimental data. Moreover, these deviations may accumulate in repeated experiments, severely affecting data repeatability and making it difficult to verify and compare results from different experiments. Furthermore, unreliable data reduces the credibility of experimental results, failing to provide accurate references for subsequent research and applications.

[0004] Most existing clamping devices employ a fixed-angle structure, which has inherent design limitations. Most existing clamping devices can only perform loading operations in a single direction or offer only simple angle adjustments. However, spinal specimens have complex spatial orientations, with each part exhibiting unique mechanical properties in different directions. Fixed-angle clamping devices cannot accommodate this complex spatial orientation, making it difficult to apply comprehensive and accurate loading to the spinal specimen during experiments, thus limiting the scope of experiments and the accuracy of results. Utility Model Content

[0005] In view of this, the purpose of this utility model is to overcome the shortcomings in related technologies and to provide a clamping fixture for spinal biomechanics experiments.

[0006] This utility model provides the following technical solution: A clamping fixture for spinal biomechanics experiments includes a clamping seat, a hinged ball, and a support seat.

[0007] One end of the clamping seat is provided with a clamping part, through which the clamping seat clamps and fixes the spinal specimen; the articulated ball is assembled and connected to the end face of the clamping seat opposite to the clamping part by a connecting rod; the support seat is installed on the experimental table, and the support seat has a hinge groove corresponding to the articulated ball, in which the articulated ball is installed; the support seat is provided with a locking member, which is used to limit the relative position between the articulated ball and the articulated groove.

[0008] As a further improvement to the above technical solution, a clamping groove is provided on the end face of the clamping seat away from the hinge ball. The inner sidewall of the clamping groove is inclined. The bottom area of ​​the clamping groove is larger than the cross-sectional area of ​​the groove opening. The clamping groove is used to form the clamping part. After the end of the spinal specimen is inserted into the clamping groove, resin is poured into the clamping groove and cured, so that the clamping seat and the spinal specimen can be fixedly connected.

[0009] As a further improvement to the above technical solution, two clamping members are symmetrically assembled on the clamping base, and the clamping members are provided with mating grooves. The mating grooves on the two clamping members together form the clamping groove.

[0010] As a further improvement to the above technical solution, the side wall of the clamping member is provided with a first locking hole, and a locking bolt is threaded through the first locking hole. The locking bolt passes through the first locking hole and presses against the side surface of the spinal specimen.

[0011] As a further improvement to the above technical solution, a second locking hole corresponding to the locking member is provided on the side wall of the support base. The locking member passes through the second locking hole by means of threaded engagement and presses against the outer surface of the hinge ball.

[0012] As a further improvement to the above technical solution, a pitch notch is provided on the side wall of the hinge groove, which communicates with the opening of the hinge groove, and the width of the pitch notch is not less than the cross-sectional diameter of the connecting rod.

[0013] As a further improvement to the above technical solution, the support base consists of a base and a rotating base, the rotating base being rotatably mounted on the base, and the hinge groove being formed on the rotating base.

[0014] As a further improvement to the above technical solution, a third locking hole is provided on the side wall of the base, and a locking bolt is threaded through the third locking hole. The locking bolt passes through the third locking hole and presses against the side surface of the rotating seat.

[0015] As a further improvement to the above technical solution, a pre-tightening element is provided between the bottom of the hinge groove and the hinge ball.

[0016] As a further improvement to the above technical solution, the bottom of the support base is equipped with an adapter plate, and the adapter plate has multiple elongated holes on its periphery.

[0017] Compared with related technologies, the beneficial effects of this utility model are: The clamping fixture provided by this invention for spinal biomechanical experiments can meet the requirements for stable clamping and flexible adjustment of spinal specimens under various mechanical experimental conditions. Specifically, when researchers need to perform a series of complex mechanical experiments on spinal specimens, such as axial pull-out, shearing, torsion, and fatigue loading, they can operate according to the following steps: First, the support base is assembled on the experimental table, and then the clamping part on the clamping base is used to clamp and fix the end of the spinal specimen.

[0018] At this point, because the clamping seat and the support seat are hinged together via a hinged ball joint, this design gives the clamping seat the flexibility to swing and rotate in three dimensions relative to the support seat. Researchers can precisely adjust the angle of the clamping seat in three-dimensional space according to the specific needs of the experiment, thereby achieving accurate and on-demand adjustment of the clamping and fixing direction of the spinal specimen. This adjustability is crucial for simulating the stress state of the spine under real physiological conditions, helping to improve the accuracy and reliability of the experiment. After adjustment, the relative position between the hinged ball and the hinge slot on the support seat can be restricted using the locking device on the support seat. This step ensures that the relative position of the clamping seat and the support seat remains unchanged during the experiment, providing stable experimental conditions for subsequent mechanical experiments.

[0019] Finally, once the clamping and angle adjustment of the spinal specimen are complete, researchers can conduct the corresponding mechanical experiments. This invention effectively solves the problem of comprehensively and accurately loading the spinal specimen during experiments through the aforementioned precise clamping process and flexible angle adjustment. This innovative design not only ensures the smooth conduct of the experiment but also greatly improves the accuracy of the results. Furthermore, during the angle adjustment process, there is no need to frequently release the clamping device and replace the clamping mechanism, which greatly simplifies the experimental procedure and significantly improves the efficiency of mechanical experiments on the spinal specimen.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a clamping fixture for spinal biomechanics experiments according to one embodiment of the present invention. Figure 2 This invention provides a schematic diagram of another perspective of the clamping fixture used in spinal biomechanics experiments according to one embodiment of the present invention. Figure 3 This illustration shows another perspective structural diagram of a clamping fixture used for spinal biomechanics experiments in one embodiment of the present invention.

[0023] Explanation of key component symbols: 100-Clamping seat; 110-Clamping part; 111-Clamping groove; 112-Clamping component; 113-First locking hole; 200-Hinge ball; 210-Connecting rod; 300-Support seat; 310-Hinge groove; 311-Pitch notch; 312-Pre-tightening component; 313-Locking component; 320-Second locking hole; 330-Base; 331-Third locking hole; 340-Rotating seat; 400-Adapter plate; 410-Elongated hole. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] Combination Figure 1 , Figure 2 The present invention provides a clamping fixture for spinal biomechanics experiments, comprising a clamping seat 100, a hinge ball 200, and a support seat 300.

[0030] One end of the clamping seat 100 is provided with a clamping part 110, which clamps and fixes the spinal specimen. The articulated ball 200 is assembled and connected to the end face of the clamping seat 100 away from the clamping part 110 by a connecting rod 210. The support seat 300 is mounted on the experimental table. The support seat 300 has an articulated groove 310 corresponding to the articulated ball 200, and the articulated ball 200 is installed in the articulated groove 310. The support seat 300 is provided with a locking member 313, which is used to limit the relative position between the articulated ball 200 and the articulated groove 310.

[0031] The clamping fixture provided in this embodiment for spinal biomechanical experiments can be operated as follows when researchers need to perform a series of complex mechanical experiments on spinal specimens, such as axial pull-out, shearing, torsion, and fatigue loading: First, assemble the support base 300 on the experimental table. Then, use the clamping part 110 on the clamping base 100 to clamp and fix the end of the spinal specimen. Since the clamping base 100 and the support base 300 are hinged together via a hinge ball 200, this design gives the clamping base 100 the flexibility to swing and rotate in three dimensions relative to the support base 300. Researchers can drive the clamping base 100 to make precise angle adjustments in three-dimensional space according to the specific needs of the experiment, thereby achieving accurate and on-demand adjustment of the clamping and fixing direction of the spinal specimen. This adjustment capability is crucial for simulating the stress state of the spine under real physiological conditions, helping to improve the accuracy and reliability of the experiment. After adjustment, the locking element 313 on the support 300 can be used to restrict the relative position between the articulated ball 200 and the articulated groove 310 on the support 300. This step ensures that the relative position between the clamping seat 100 and the support 300 remains unchanged during the experiment, providing stable experimental conditions for subsequent mechanical experiments. Finally, after the clamping and angle adjustment of the spinal specimen are completed, researchers can conduct the corresponding mechanical experiments.

[0032] In some specific embodiments, the clamping seat 100 has a clamping groove 111 on its end face opposite to the hinge ball 200. The inner sidewall of the clamping groove 111 is inclined, and the bottom area of ​​the clamping groove 111 is larger than the cross-sectional area of ​​the groove opening. The clamping groove 111 forms the clamping part 110. When clamping a spinal specimen, the end of the spinal specimen is inserted into the clamping groove 111. Due to the constricted design of the clamping groove 111, the sidewall of the clamping groove 111 can initially close and limit the spinal specimen during the insertion process, preventing it from shaking or shifting before fixation, thus facilitating subsequent fixation operations.

[0033] Next, to achieve a more stable and reliable connection between the clamp 100 and the spinal specimen, resin is poured into the clamping groove 111. After pouring, the resin gradually fills the gap between the clamping groove 111 and the spinal specimen. As the resin cures, the clamp 100 and the spinal specimen are tightly fixed together. This fixing method is not only strong and reliable, able to withstand various mechanical forces generated during the experiment, but also simpler to operate compared to some other complex fixing methods.

[0034] If the spinal specimen needs to be removed from the clamping slot 111 during subsequent experiments, simply use a hot air gun, heating plate, or other tools to heat the cured resin to soften it, and then remove the cured resin. This greatly saves time and effort and improves the efficiency of the entire experimental process.

[0035] In some specific embodiments, two clamping members 112 are symmetrically mounted on the clamping base 100. Each clamping member 112 has a mating groove, and the mating grooves of the two clamping members 112 together form a clamping groove 111. The two clamping members 112 are connected to the clamping base 100 by bolts or other connecting components. This design demonstrates its unique advantages when the cured resin along with the spinal specimen needs to be removed from the clamping base 100 after the experiment. The operator only needs to remove the two clamping members 112 from the clamping base 100 individually. Since the two clamping members 112 are connected to the clamping base 100 by bolts or other connecting components, the removal process is relatively simple and quick. Once the two clamping members 112 are removed, the clamping groove 111 formed by them will open, and the cured resin along with the spinal specimen can be easily removed without the need for complex tools or cumbersome operations.

[0036] After removing the cured resin along with the spinal specimen, separating the resin from the specimen is a simple and efficient process. Heating can be used to soften the cured resin. Since the adhesion between the resin and the spinal specimen weakens after heating, the resin can be easily detached from the specimen after proper treatment. This design not only facilitates operation but also significantly improves the efficiency of the entire experimental procedure, reducing unnecessary time and effort.

[0037] In some specific embodiments, the side wall of the clamping member 112 is provided with a first locking hole 113, and a locking bolt is threaded through the first locking hole 113. The locking bolt passes through the first locking hole 113 and presses against the side surface of the spinal specimen, which helps to ensure the reliability of the relative position restriction between the spinal specimen and the clamping seat 100, thereby ensuring the accuracy of the subsequent experimental process.

[0038] In some specific embodiments, the side wall of the support 300 is provided with a second locking hole 320 corresponding to the locking member 313. The locking member 313 passes through the second locking hole 320 by means of thread engagement and presses against the outer surface of the hinge ball 200. This facilitates ensuring the reliability of the relative position restriction between the support 300 and the hinge ball 200, thereby ensuring the accuracy of maintaining the fixed angle of the spinal specimen during subsequent experiments.

[0039] In some specific embodiments, a pitch notch 311 communicating with the opening of the hinge groove 310 is provided on the side wall of the hinge groove 310. The width of the pitch notch 311 is not less than the cross-sectional diameter of the connecting rod 210. The hinge ball 200 rotates within the hinge groove 310, enabling the connecting rod 210 to fall into the pitch notch 311. In actual use, when it is necessary to adjust the swing angle of the support base 300 relative to the horizontal axis, the hinge ball 200 can rotate freely within the hinge groove 310. As the hinge ball 200 rotates, the connected connecting rod 210 will also move accordingly. Due to the reasonable width setting of the pitch notch 311, the connecting rod 210 can smoothly fall into the pitch notch 311 under the action of the hinge ball 200.

[0040] This design offers significant advantages. When the connecting rod 210 falls into the pitch notch 311, the range of angle adjustment for the spinal sample relative to the horizontal axis, driven by the support 300, is greatly improved. Traditional hinged structures may have a limited swing angle range due to space constraints, failing to meet the requirements of some special experiments that demand large-angle swings. However, this design in this embodiment allows the spinal sample to swing within a wider angle range, thus simulating more stress conditions under different physiological states.

[0041] Furthermore, this expanded angle adjustment range further enhances the applicable experimental scope of this embodiment. Whether studying the biomechanical properties of the spine in different postures or conducting fatigue loading experiments requiring large-angle oscillations, this embodiment is capable. It provides researchers with a wider experimental space, helps obtain more comprehensive and accurate experimental data, and promotes the development of spinal biomechanics research.

[0042] In some specific embodiments, the support 300 is composed of a base 330 and a rotating seat 340. The rotating seat 340 is rotatably mounted on the base 330, and the hinge groove 310 is formed on the rotating seat 340. The rotating seat 340 rotates relative to the base 330, which can drive the hinge ball 200, the clamping seat 100, the spinal sample, etc. to rotate synchronously, thereby realizing the angle adjustment of the spinal sample relative to the vertical axis and further improving the adjustment accuracy.

[0043] In some specific embodiments, a third locking hole 331 is provided on the side wall of the base 330. A locking bolt is threaded through the third locking hole 331 and presses against the side surface of the rotating seat 340. This facilitates ensuring the reliability of the relative position restriction between the base 330 and the rotating seat 340, thereby ensuring the accuracy of maintaining the fixed angle of the spinal specimen during subsequent experiments.

[0044] like Figure 3 As shown, in some specific embodiments, a pre-tightening member 312 is provided between the bottom of the hinge groove 310 and the hinge ball 200. This pre-tightening member 312 has a specific function; it can be made of a gasket material with good elasticity, such as a rubber pad. Due to its own elastic properties, the rubber pad can generate a certain elastic pressure between the hinge ball 200 and the hinge groove 310. This elastic pressure creates a pre-tight fit between the hinge ball 200 and the hinge groove 310, essentially adding an "invisible constraint" between them.

[0045] In practical applications, when the device is in an unlocked state, without the pre-tensioning member 312, the articulated ball 200 may move freely within the articulation groove 310, potentially causing wobbling or displacement. This relative movement not only affects the precise operation of the device but may also lead to deviations during the subsequent locking process, thus impacting the overall performance of the device. However, with the pre-tensioning member 312, the elasticity of the rubber pad firmly holds the articulated ball 200 within the articulation groove 310, effectively preventing relative movement between the articulated ball 200 and the articulation groove 310 in the unlocked state.

[0046] In some specific embodiments, the bottom of the support base 300 is equipped with an adapter plate 400, and the adapter plate 400 has multiple elongated holes 410 on its periphery. During installation, the adapter plate 400 is assembled and connected to the experimental platform surface by bolts. In specific operation, the bolts are passed through the elongated holes 410 and then threaded into the pre-set mounting holes on the experimental platform surface. This connection method ensures the stability of the connection and provides convenience for subsequent adjustments.

[0047] The elongated hole 410 features a long, narrow design, offering several significant advantages. Firstly, since the mounting holes on different laboratory benchtops may vary in position and size, the elongated structure of the elongated hole 410 effectively accommodates these differences. It acts like a flexible "adjustment window," allowing the adapter plate 400 to precisely fit the mounting holes of different locations and sizes on various laboratory benchtops. Regardless of whether the mounting holes on the laboratory benchtop are offset to the left or right, or have large or small spacing, the adapter plate 400 can find a suitable mounting position through the elongated hole 410, thus achieving a secure connection.

[0048] On the other hand, the design of the elongated hole 410 also facilitates the offset placement of the adapter plate 400 relative to the experimental platform according to actual experimental needs. In spinal sample mechanical experiments, it is often necessary to load and test the sample from different angles to fully understand its mechanical properties. By adjusting the position of the adapter plate 400 within the range of the elongated hole 410, the support 300 can drive the spinal sample to achieve a certain angle offset, thereby meeting more angle requirements.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A clamping fixture for spinal biomechanics experiments, characterized in that, include: A clamping seat (100) is provided at one end of a clamping part (110), and the clamping seat (100) clamps and fixes the spinal specimen through the clamping part (110); The articulated ball (200) is assembled and connected to the end face of the clamping seat (100) away from the clamping part (110) via a connecting rod (210); A support base (300) is mounted on the experimental table. The support base (300) has a hinge groove (310) corresponding to the hinge ball (200), and the hinge ball (200) is installed in the hinge groove (310). The support base (300) is provided with a locking member (313), which is used to limit the relative position between the hinge ball (200) and the hinge groove (310).

2. The clamping fixture for spinal biomechanics experiments according to claim 1, characterized in that, The clamping seat (100) has a clamping groove (111) on the end face away from the hinge ball (200). The inner sidewall of the clamping groove (111) is inclined. The bottom area of ​​the clamping groove (111) is larger than the cross-sectional area of ​​the groove opening. The clamping groove (111) is used to form the clamping part (110). After the end of the spinal specimen is inserted into the clamping groove (111), resin is poured into the clamping groove (111) and cured, so that the clamping seat (100) and the spinal specimen can be fixedly connected.

3. The clamping fixture for spinal biomechanics experiments according to claim 2, characterized in that, Two clamping members (112) are symmetrically assembled on the clamping base (100). The clamping members (112) are provided with mating grooves, and the mating grooves on the two clamping members (112) together form the clamping groove (111).

4. The clamping fixture for spinal biomechanics experiments according to claim 3, characterized in that, The clamping member (112) has a first locking hole (113) on its side wall. A locking bolt is threaded through the first locking hole (113) and presses against the side surface of the spine specimen.

5. The clamping fixture for spinal biomechanics experiments according to claim 1, characterized in that, The support base (300) has a second locking hole (320) corresponding to the locking member (313) on its side wall. The locking member (313) passes through the second locking hole (320) by means of thread engagement and presses against the outer surface of the hinge ball (200).

6. The clamping fixture for spinal biomechanics experiments according to claim 1, characterized in that, The hinge groove (310) has a pitch notch (311) on its side wall that communicates with the opening of the hinge groove (310). The width of the pitch notch (311) is not less than the cross-sectional diameter of the connecting rod (210).

7. The clamping fixture for spinal biomechanics experiments according to claim 1, characterized in that, The support base (300) consists of a base (330) and a rotating base (340). The rotating base (340) is rotatably mounted on the base (330), and the hinge groove (310) is formed on the rotating base (340).

8. The clamping fixture for spinal biomechanics experiments according to claim 7, characterized in that, A third locking hole (331) is provided on the side wall of the base (330). A locking bolt is threaded through the third locking hole (331) and presses against the side surface of the rotating seat (340).

9. The clamping fixture for spinal biomechanics experiments according to any one of claims 1 to 8, characterized in that, A preload (312) is provided between the bottom of the hinge groove (310) and the hinge ball (200).

10. The clamping fixture for spinal biomechanics experiments according to any one of claims 1 to 8, characterized in that, The bottom of the support base (300) is equipped with an adapter plate (400), and the adapter plate (400) has multiple elongated holes (410) on its periphery.

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