Bone cutting equipment

Abstract

The present invention relates to a bone cutting device, which belongs to medical surgical equipment. The bone cutting device includes a housing for shielding the high-intensity magnetic field generated by a magnetic resonance environment, a driving member disposed within the housing, and a clamping assembly connected to the output shaft of the driving member and for mounting a cutting tool. By providing a housing for shielding the high-intensity magnetic field generated by the magnetic resonance environment, the bone cutting device of the present application is not affected by the magnetic field when used in a magnetic resonance environment. Therefore, compared with the prior art, the bone cutting device of the present application is not restricted in its application environment, has a wide range of applicability, is highly practical, and helps improve surgical efficiency in a magnetic resonance surgery environment.

Description

Technical Field

[0001] The invention relates to a bone cutting device, belonging to medical operation equipment. Background Art

[0002] Magnetic resonance imaging (MRI) is a new diagnostic imaging technology introduced to clinical practice in the 1980s. MRI offers multi-directional, multi-planar, and multi-parameter imaging, with excellent soft tissue resolution and precise geometric properties. Compared to X-rays and CT scans, MRI emits no ionizing radiation, making it harmless to both patients and surgeons. Due to its advantages over other imaging modalities in minimally invasive surgery, doctors and engineers have decided to integrate robotic technology into MRI. This has led to the development of MRI-guided robotic minimally invasive surgery, which offers advantages such as radiation-free, multi-directional imaging, excellent soft tissue resolution, precise positioning, and extended operating time. It represents the future direction of minimally invasive surgery, both now and for a long time to come. However, the strong magnetic field generated by MRI makes it impossible to use powered bone cutting devices in MRI environments, forcing manual bone cutting devices to be used in existing MRI systems. Summary of the Invention

[0003] An object of the present invention is to provide a bone cutting device that can be used in a magnetic resonance environment.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a bone cutting device, comprising a shell for shielding the high-intensity magnetic field generated by a magnetic resonance environment, a driving member arranged in the shell, and a clamping assembly connected to the output shaft of the driving member and used to install a cutting tool.

[0005] Furthermore, the shell covers the outside of the driving member and extends to the clamping assembly.

[0006] Furthermore, the bone cutting device further comprises a signal interface for connecting to an external control device, and the signal interface receives signals from the external control device to control the operation of the driving member.

[0007] Furthermore, the bone cutting device also includes a control module for controlling the operation of the driving member and a signal interface for connecting the control module with the external control device signal. After the signal interface is plugged into the external control device, the control module controls the operation of the driving member according to the instructions issued by the external control device.

[0008] Furthermore, the shell includes a support shell for the surgical operator to hold.

[0009] Furthermore, the housing includes a support housing for achieving a detachable mechanical connection with a surgical robot or an external support mechanism.

[0010] Furthermore, the housing includes a mechanical outer shell and a shielding inner shell disposed within the mechanical outer shell for shielding a high-intensity magnetic field generated by a magnetic resonance environment.

[0011] Furthermore, the bone cutting device also includes a reducer arranged between the driving member and the clamping assembly, the reducer is connected to the output shaft of the driving member to transmit the driving force of the driving member to the clamping assembly, and the shell is also covered on the outside of the reducer.

[0012] Furthermore, the clamping assembly is connected to the reducer via a guide module. The guide module includes a connecting shaft and a bearing provided on the connecting shaft. Both ends of the connecting shaft are respectively connected to the reducer and the clamping assembly.

[0013] Furthermore, the materials used for the connecting shaft and the bearing are nuclear magnetic compatible materials.

[0014] The beneficial effect of the present invention is that the bone cutting device of the present application is provided with a shell for shielding the high-intensity magnetic field generated by the magnetic resonance environment, so that when the bone cutting device is used in the magnetic resonance environment, it will not be affected by the magnetic field. Therefore, compared with the existing technology, the bone cutting device of the present application is not restricted in its application environment, has a wide applicability, is highly practical, and helps to improve surgical efficiency in the magnetic resonance surgery environment.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of a bone cutting device according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 The structure diagram of the bone cutting device after removing part of the shell is shown. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] See Figure 1 and Figure 2A bone cutting device 10, shown in one embodiment of the present invention, can be used in a magnetic resonance imaging (MRI) environment. The bone cutting device 10 comprises a housing 1 for shielding against the high-intensity magnetic field generated in the MRI environment, a driver 2 disposed within the housing 1, and a clamping assembly 3 connected to an output shaft (unnumbered) of the driver 2 for mounting a cutting tool 20. In this embodiment, the driver 2 is a motor.

[0020] The shell 1 is wrapped around the outside of the motor 2 and extends to the clamping assembly 3, which is located on the outside of the shell 1. In this embodiment, the shell 1 can not only shield the high-intensity magnetic field, but also play a protective and supporting role. The shell 1 is made of a high-magnetic permeability material. In other embodiments, the shell can be divided into two parts, specifically: the shell includes a mechanical outer shell and a shielding inner shell arranged in the mechanical outer shell to shield the high-intensity magnetic field generated by the magnetic resonance environment. The mechanical outer shell only plays a role of protecting internal components (such as motors, etc.) and supporting. The shielding inner shell is made of a high-magnetic permeability material.

[0021] High magnetic permeability materials are commonly used in the prior art to shield against high-intensity magnetic fields. Their purpose is to reduce the specified magnetic field so that it does not pose a threat to the shielded device or system. Existing magnetic shielding materials include 80% nickel alloy Mumetal, which meets the requirements of MIL-N-14411C Part 1 and ASTM A753-97 Style 4. They are available in relatively thin thicknesses of 0.002 to 0.125 inches and are easily processed by experienced shielding fabricators. Another example is ultra-low carbon steel (ULCS), which typically has a carbon content of less than 0.01% and has higher magnetic permeability and excellent saturation performance than other steels. These materials are less flexible and easier to manufacture than silicon steel, allowing for easy installation and the same processing of small components in large-area shielding projects.

[0022] The housing 1 fits snugly against the motor housing (unnumbered) of the motor 2 to prevent field leakage. The interior of the housing 1 can be designed to be as close to a circle as possible, creating a semi-closed magnetic circuit. The housing 1 can be assembled from multiple pieces of shielding material. Magnetic continuity between the multiple pieces can be maintained mechanically (using friction assemblies) or by welding. Welding can be used at corners or transitional connections to achieve optimal performance. Maintaining surface continuity ensures that magnetic lines of force continuously follow their low-magnetic resistance paths, thereby improving shielding effectiveness. Of course, the housing 1 can also be formed by bending or machining two pieces of shielding material. In this embodiment, the housing 1 includes a main housing 11 and a support housing 12. The main housing 11 is used to shield the high-intensity magnetic field generated in a magnetic resonance environment. The support housing 12 may not have a shielding function and is used to achieve a removable mechanical connection with a surgical robot (not shown). Of course, in other embodiments, the support housing 12 may not be docked with the surgical robot, but may be mounted on other external support structures. Alternatively, the support shell 12 is a gripping component for the surgical operator to hold.

[0023] The bone cutting device 10 is controlled by an external control device. Specifically, the bone cutting device also includes a signal interface 7 for connecting to the external control device. After being plugged into the external control device, the signal interface 7 receives external control signals from the external control device to control the operation of the motor 2. The signal interface 7 is located on the rear end face of the main body housing 11. In this embodiment, the bone cutting device 10 does not have a control module installed, and is directly controlled by the external control device. However, in other embodiments, a control module may be installed within the bone cutting device 10 to receive commands from the external control device to operate. For example, the bone cutting device also includes a control module for controlling the operation of the motor and a signal interface for connecting the control module to the external control device. This signal interface can be the same as the signal interface in this embodiment. After being plugged into the external control device, the control module controls the operation of the motor according to the commands issued by the external control device. The external control device can be a surgical robot, which can be implemented using existing control methods and mechanical structures, and will not be described in detail here.

[0024] The bone cutting device 10 also includes a reducer 4 and a guide module arranged between the motor 2 and the clamping assembly 3, and the clamping assembly 3 is connected to the reducer 4 through the guide module. The guide module includes a connecting shaft 5 and a bearing 6 arranged on the connecting shaft 5. The reducer 4, the connecting shaft 5 and the bearing 6 are arranged in a main body housing 11. The reducer 4 is connected to the output shaft of the motor 2 to transmit the driving force of the motor 2 to the clamping assembly 3. The clamping assembly 3 is connected to the reducer 4 through the connecting shaft 5. The two ends of the connecting shaft 5 are respectively connected to the reducer 4 and the clamping assembly 3, and the bearing is arranged in the main body housing 11 to support the connecting shaft 5 to rotate in the main body housing 11. In this embodiment, in order to reduce the influence of the magnetic field of the magnetic resonance environment on the bone cutting device, the material used for the connecting shaft and the bearing is a nuclear magnetic compatible material, and the nuclear magnetic compatible material can be a material such as ceramic that is not affected by the magnetic field in the magnetic resonance environment.

[0025] To sum up, the above-mentioned bone cutting device 10 is provided with a shell 1 for shielding the high-intensity magnetic field generated by the magnetic resonance environment, so that when the bone cutting device 10 is used in the magnetic resonance environment, it will not be affected by the magnetic field. Therefore, compared with the existing technology, the bone cutting device 10 is not restricted in its application environment, has a wide applicability, is highly practical, and helps to improve surgical efficiency in the magnetic resonance surgery environment.

[0026] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A bone cutting device, characterized in that: The invention comprises a housing for shielding a high-intensity magnetic field generated by a magnetic resonance environment, a driving member disposed within the housing, and a clamping assembly connected to an output shaft of the driving member and for mounting a cutting tool; the driving member is a motor, the housing fits closely to the motor housing of the motor to prevent field leakage, and the structure inside the housing is designed to be nearly circular to establish a semi-closed magnetic circuit; The shell is made of multiple plates of shielding material, and the magnetic continuity between the multiple plates is maintained by mechanical means or welding, and the corners or transitions are connected by welding; The shell is made of high magnetic permeability material to shield high-intensity magnetic fields.

2. The bone cutting device according to claim 1, wherein The shell covers the outer side of the driving member and extends to the clamping assembly.

3. The bone cutting device according to claim 1 or 2, characterized in that: The bone cutting device further comprises a signal interface for connecting to an external control device signal, and the signal interface receives an external control signal to control the operation of the driving member.

4. The bone cutting device according to claim 3, wherein The bone cutting device also includes a control module for controlling the operation of the driving member and a signal interface for connecting the control module with an external control device signal. After the signal interface is plugged into the external control device, the control module controls the operation of the driving member according to the instructions issued by the external control device.

5. The bone cutting device according to claim 1 or 2, characterized in that: The housing includes a support housing for a surgical operator to hold in hand.

6. The bone cutting device according to claim 1 or 2, characterized in that: The housing includes a support housing for realizing a detachable mechanical connection with a surgical robot or an external support mechanism.

7. The bone cutting device according to claim 1 or 2, characterized in that: The bone cutting device further includes a reducer disposed between the driving member and the clamping assembly, the reducer being connected to the output shaft of the driving member to transmit the driving force of the driving member to the clamping assembly, and the shell simultaneously covering the outside of the reducer.

8. The bone cutting device according to claim 7, wherein: The clamping assembly is connected to the reducer through a guide module. The guide module includes a connecting shaft and a bearing arranged on the connecting shaft. Both ends of the connecting shaft are respectively connected to the reducer and the clamping assembly.

9. The bone cutting device according to claim 8, wherein The materials used for the connecting shaft and the bearing are nuclear magnetic compatible materials.

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