Novel device for measuring bone stiffness in vitro

Abstract

The utility model discloses a novel device for measuring bone stiffness in vitro, which comprises a mounting frame, a measuring seat arranged at one end of the mounting frame, a laser range finder arranged on the mounting frame, a ball bearing arranged at one end of the measuring seat close to the laser range finder, and a spline shaft in sliding connection with the measuring seat through the ball bearing. A laser range finder is arranged on the measuring seat, a distance measuring disc is arranged at one end, close to the laser range finder, of the spline shaft, a force application head is arranged at one end, away from the laser range finder, of the spline shaft, and chuck assemblies are arranged at the ends, close to each other, of the force application head and the measuring seat respectively. Traditional setting is changed, bone performance test evaluation does not need to be formulated based on experience of doctors, quantitative measurement can be achieved, the rigidity performance of bones can be accurately reflected, the components can be rapidly installed and detached according to requirements, the structure is simple, operation is convenient and rapid, and use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a novel device for measuring bone stiffness in vitro. Background Art

[0002] Currently, in the medical field, the treatment and rehabilitation process of fractures are crucial to the health and quality of life of patients. However, the success of fracture healing depends on the biomechanical properties of the bone, especially its stiffness and stability. Traditionally, there is no accurate device to evaluate bone stiffness, which mainly relies on the experience and evaluation tables of clinicians. Although these methods can provide information about bone performance to a certain extent, they still have some limitations. The bone performance test evaluation table is also based on the doctor's experience and cannot accurately reflect the stiffness performance of the bone through a quantitative, objective indicator.

[0003] However, the devices currently proposed for measuring bone force and position information have the following shortcomings: 1) an external fixator with force and position sensors needs to be installed during surgery, such as the new external fixator described in patent CN109077785A; 2) bone stiffness is analyzed through a complex plantar pressure system and external fixation system, such as the plantar pressure insole system used in patent CN115462795A, which has a complex structure and cannot be used to evaluate upper limb bone stiffness.

[0004] In summary, the existing bone stiffness measuring devices have many defects, and there is an urgent need to design a bone stiffness measuring device with a simple system that can perform in vitro measurements. Utility Model Content

[0005] The purpose of the utility model is to provide a novel device for measuring bone stiffness in vitro, so as to solve the problems that the existing bone stiffness measuring devices are complex in structure, unchanged in use, need to be formulated based on the experience of doctors, and cannot accurately reflect the stiffness performance of bones through a quantitative and objective indicator.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel device for measuring bone stiffness in vitro comprises a mounting frame, a measuring seat is arranged at one end of the mounting frame, a laser rangefinder is arranged on the mounting frame, a ball bearing is arranged at one end of the measuring seat close to the laser rangefinder, a spline shaft is slidably connected to the measuring seat through the ball bearing, a distance measuring disk is arranged at one end of the spline shaft close to the laser rangefinder, a force applying head is arranged at one end of the spline shaft away from the laser rangefinder, and chuck assemblies are respectively arranged at the ends of the force applying head and the measuring seat close to each other.

[0008] Optionally, the laser rangefinder is detachably mounted on a mounting base via a locking bolt, a T-shaped slider is disposed at the bottom end of the mounting base, the T-shaped slider is slidably disposed in a T-shaped slide groove, the T-shaped slide groove is opened at the top end of the mounting frame, and one end of the mounting base is connected to the mounting frame via a locking bolt.

[0009] Optionally, the chuck assembly includes a tension and compression sensor, which is arranged at the bottom end of the force applying head, a first chuck is arranged on the tension and compression sensor, a second chuck is arranged on the opposite side of the first chuck, and the second chuck is connected to the measuring seat through a ball joint.

[0010] Optionally, a locking bolt is provided on the ball joint, the mounting frame is arranged in a straight line shape, and a through hole is provided at one end away from the measuring seat.

[0011] The beneficial effects of the utility model are as follows: by setting the chuck assembly, the freedom of the chuck during installation can be facilitated, and the chuck can be installed on the measuring seat at multiple angles, changing the traditional setting, and the bone performance test evaluation no longer needs to be based on the doctor's experience, and quantitative measurement can be achieved, accurately reflecting the stiffness performance of the bone. The above-mentioned components can be quickly installed and disassembled according to needs, the structure is simple and the operation is convenient and quick, meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the utility model.

[0016] In the figure: 1. mounting frame; 2. measuring seat; 3. laser rangefinder; 4. ball bearing; 5. spline shaft; 6. distance measuring plate; 7. force head; 8. tension and compression sensor; 9. first chuck; 10. ball joint; 11. second chuck; 12. T-shaped slide; 13. mounting seat. DETAILED DESCRIPTION

[0017] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, welding, riveting, bonding, etc., or a detachable connection, threaded connection, key connection, pin connection, etc., or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0021] like Figure 1-3 A novel device for measuring bone stiffness in vitro is shown, comprising a mounting frame 1, a measuring seat 2 is arranged at one end of the mounting frame 1, a laser rangefinder 3 is arranged on the mounting frame 1, a ball bearing 4 is arranged at the end of the measuring seat 2 close to the laser rangefinder 3, a spline shaft 5 is slidably connected with the measuring seat 2 through the ball bearing 4, a distance measuring disk 6 is arranged at the end of the spline shaft 5 close to the laser rangefinder 3, a force applying head 7 is arranged at the end of the spline shaft 5 away from the laser rangefinder 3, and a chuck assembly is arranged at the end close to each other of the force applying head 7 and the measuring seat 2. It should be noted that the laser rangefinder 3 adopts the Panasonic HL-G103-A-C5 laser rangefinder, threaded holes are arranged at both ends of the spline shaft 5, and the force applying head 7 and the distance measuring disk 6 are threadedly matched and detachably arranged on the spline shaft 5.

[0022] Specifically, the laser rangefinder 3 is detachably mounted on the mounting seat 13 through a locking bolt, a T-shaped slider is disposed at the bottom of the mounting seat 13, the T-shaped slider is slidably disposed in the T-shaped slide groove 12, the T-shaped slide groove 12 is opened at the top of the mounting frame 1, and one end of the mounting seat 13 is connected to the mounting frame 1 through a locking bolt. It should be noted that the mounting seat 13 can adjust its position on the mounting frame 1 according to needs to achieve the effect of installation and removal of the wires, and the laser rangefinder 3 can be installed and removed from the mounting seat 13 according to needs.

[0023] Specifically, the chuck assembly includes a tension and compression sensor 8, which is arranged at the bottom end of the force applying head 7, a first chuck 9 is arranged on the tension and compression sensor 8, a second chuck 11 is arranged on the opposite side of the first chuck 9, and the second chuck 11 is connected to the measuring seat 2 through a ball joint 10. It should be noted that a threaded hole is provided on the measuring seat 2 to be threadedly connected with the ball joint 10, external studs are provided at both ends of the tension and compression sensor 8, threaded holes are provided at the bottom of the force applying head 7 and the side of the first chuck 9, and the tension and compression sensor 8 is installed between the first chuck 9 and the force applying head 7.

[0024] Specifically, a locking bolt is provided on the ball joint 10, the mounting frame 1 is arranged in a straight line, and a through hole is provided at one end away from the measuring seat 2. It should be noted that the ball joint 10 cooperates with the locking bolt to facilitate fixing the working angle of the second chuck 11 to meet the use requirements, and the mounting frame 1 is arranged in a straight line and has a through hole to facilitate taking and installation.

[0025] The working principle of this specific embodiment is as follows: firstly, the laser rangefinder 3 is mounted on the mounting seat 13 by means of locking bolts, and then the mounting seat 13 is mounted on the mounting frame 1 in conjunction with the T-shaped slide groove 12, so that the distance measuring disk 6 is located within the measuring range of the laser rangefinder 3, and then the spline shaft 5 is extended into the ball bearing 4, and the distance measuring disk 6 is mounted on the other side of the spline shaft 5;

[0026] During measurement, the force applying head 7 is pressed by hand, and pressure is applied to the measuring point through the first chuck 9 and the second chuck 11. At this time, the tension and compression sensor 8 will record the force data, and the laser rangefinder 3 will record the frame deformation data, thereby reflecting the force deformation of the callus.

[0027] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A novel device for measuring bone stiffness in vitro, characterized in that: The invention comprises a mounting frame, a measuring seat is arranged at one end of the mounting frame, a laser rangefinder is arranged on the mounting frame, a ball bearing is arranged at one end of the measuring seat close to the laser rangefinder, a spline shaft is slidably connected with the measuring seat through the ball bearing, a distance measuring disk is arranged at one end of the spline shaft close to the laser rangefinder, a force applying head is arranged at one end of the spline shaft away from the laser rangefinder, and chuck assemblies are respectively arranged at the mutually close ends of the force applying head and the measuring seat.

2. A novel in vitro device for measuring bone stiffness according to claim 1, characterized in that: The laser rangefinder is detachably mounted on a mounting base via a locking bolt; a T-shaped slider is disposed at the bottom end of the mounting base; the T-shaped slider is slidably disposed in a T-shaped slide groove; the T-shaped slide groove is disposed at the top end of the mounting frame; and one end of the mounting base is connected to the mounting frame via a locking bolt.

3. A novel in vitro device for measuring bone stiffness according to claim 1, characterized in that: The chuck assembly includes a tension and compression sensor, which is arranged at the bottom end of the force applying head. A first chuck is arranged on the tension and compression sensor, a second chuck is arranged on the opposite side of the first chuck, and the second chuck is connected to the measuring seat through a ball joint.

4. A novel in vitro device for measuring bone stiffness according to claim 3, characterized in that: The ball joint is provided with a locking bolt, the mounting frame is arranged in a straight line shape, and a through hole is provided at one end away from the measuring seat.

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