Free body grasping forceps

Abstract

The invention discloses a pair of free body grasping forceps. The pair of free body grasping forceps comprises a handle assembly, a clamping device and a driving assembly, the clamping device has an opening state and a tightening state, the clamping device in the opening state is opened and used for grabbing the free body, and the clamping device in the tightening state is contracted and used for wrapping the free body; the driving assembly is arranged on the handle assembly, connected with the clamping device and used for driving the clamping device to be switched between the opening state and the tightening state. According to the free body grasping forceps, when the clamping device is in the tightening state, the free body can be wrapped, so that the disengagement probability of the free body is reduced, the free body is not prone to disengagement, and the difficulty of taking out the free body is reduced. Besides, the free body is wrapped by the clamping device, the free body and the joint cavity can be separated through the clamping device, and therefore when the free body grasping forceps are separated from the joint cavity, the contact probability of the free body and the joint cavity is reduced, and the risk that the free body damages the joint cavity is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, and in particular to a free body grasping forceps. BACKGROUND

[0002] Free body in joint cavity refers to foreign matter freely moving in joint cavity, which is usually composed of cartilage, bone tissue, synovial membrane or other tissue fragments. Free body can cause joint pain, swelling and limited activity. The causes of free body in joint cavity are various, including joint injury, joint degenerative disease, synovitis, bone marrow lesion, congenital anomaly, infection and metabolic disease, etc. The presence of free body in joint cavity can cause various effects on the body, mainly manifested as pain, joint swelling, limited activity, joint wear, inflammatory reaction and joint locking. Therefore, free body in joint cavity can have significant adverse effects on the body. Surgical removal of free body is one of the effective methods to relieve symptoms.

[0003] However, due to the presence of irregular concave-convex in joint cavity, the existing surgical equipment is easy to cause free body to detach when in joint cavity, and it is difficult to remove the free body. SUMMARY

[0004] The purpose of the present application is to at least solve the problem that the existing surgical equipment is easy to cause free body to detach when in joint cavity. The purpose is achieved in the following way:

[0005] The present application provides a free body grasping forceps, comprising: a handle assembly, a clamping device and a driving assembly. The clamping device has an open state and a tightening state, the clamping device in the open state is open and used for grasping free body, and the clamping device in the tightening state is contracted and used for covering the free body; the driving assembly is arranged in the handle assembly, and the driving assembly is connected with the clamping device and used for driving the clamping device to switch between the open state and the tightening state.

[0006] The free body grasping forceps of the present application can cover the free body when the clamping device is in the tightening state, thereby reducing the probability of free body detachment, making it difficult for free body to detach, and thereby reducing the difficulty of removing the free body. In addition, by covering the free body with the clamping device, the free body can be separated from the joint cavity by the clamping device, thereby reducing the probability of contact between the free body and the joint cavity when the free body grasping forceps of the present application is detached from the joint cavity, thereby reducing the risk of damage to the joint cavity by the free body.

[0007] In some embodiments, the clamping device comprises a plurality of pincers arranged in sequence along the circumferential direction of the handle assembly, the plurality of pincers are movably connected with the driving assembly and capable of approaching and separating from each other, when the clamping device is in the open state, the plurality of pincers are separated from each other and used for grabbing the free body, when the clamping device is in the closed state, the plurality of pincers are in contact with each other and used for covering the free body.

[0008] In some embodiments, the pincers comprise a pincer body and a hook, a first end of the pincer body is movably connected with the driving assembly, a second end of the pincer body is connected with the hook, and the hook is located at the inner side of the pincer body along the inner-outer direction of the handle assembly.

[0009] In some embodiments, the pincer body is arranged to be deformable along the inner-outer direction of the handle assembly, the pincer body comprises a first pincer part and a second pincer part connected with each other, the first pincer part has the first end, the second pincer part has the second end, from the first end to the second end, the first pincer part is away from the first end along the inner-outer direction of the handle assembly, from the second end to the first end, the second pincer part is away from the second end along the inner-outer direction of the handle assembly.

[0010] In some embodiments, the clamping device is movably arranged between the handle assembly in the extended position and the retracted position, when the clamping device is in the extended position, the clamping device is located outside the handle assembly, when the clamping device is in the retracted position, the clamping device is located inside the handle assembly.

[0011] In some embodiments, the handle assembly comprises a tube body and a handle connected with each other, the tube body defines an accommodation cavity inside, when the clamping device is in the retracted position, the plurality of pincers are in contact with the inner wall of the accommodation cavity to make the plurality of pincers in contact with each other, when the clamping device is in the extended position, the plurality of pincers are separated from the inner wall of the accommodation cavity to make the plurality of pincers separated from each other.

[0012] In some embodiments, the driving assembly comprises a push button and a connecting rod, part of the connecting rod is arranged inside the tube body, and another part of the connecting rod is arranged inside the handle, one end of the connecting rod is connected with the plurality of pincers, and the other end of the connecting rod is connected with the push button, the push button is movably arranged in the handle and used for driving the clamping device to move between the extended position and the retracted position.

[0013] In some embodiments, the tube body comprises a sleeve and a deformation tube, one end of the sleeve is connected with the handle, the other end of the sleeve is connected with the deformation tube, the handle assembly further comprises a connecting wire, a winding device and a first limit switch, one part of the connecting wire is connected with the deformation tube, the other part of the connecting wire is wound on the winding device, the winding device is rotatably arranged on the handle and is used for tightening or releasing the connecting wire for driving the deformation tube to deform, the first limit switch is movably arranged between a first limit position and a first separation position on the handle, the first limit switch in the first limit position is connected with the winding device and limits the rotation of the winding device, and the first limit switch in the first separation position is separated from the winding device.

[0014] In some embodiments, the handle comprises a rotating part and a handle part, the rotating part is provided with the winding device and the first limit switch, the rotating part is connected with the sleeve, and the rotating part is rotatably arranged on the handle part along the circumferential direction of the handle assembly, the handle assembly further comprises a second limit switch, the second limit switch is movably arranged between a second limit position and a second separation position on the handle part, the second limit switch in the second limit position is connected with the rotating part and limits the rotation of the rotating part, and the second limit switch in the second separation position is separated from the rotating part.

[0015] In some embodiments, the driving assembly further comprises a spring, the push button is movably arranged on the handle part, the spring is arranged in the handle part and clamped between the push button and the rotating part, when the clamping device is in the extended position, the spring is in a compressed state and is configured to be able to push the push button to move, so that the clamping device can move from the extended position to the retracted position. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments and are incorporated in and constitute a part of this specification to illustrate embodiments that, together with the description, serve to explain such preferred embodiments. Like reference numerals refer to corresponding parts throughout the drawings. Among others:

[0017] Figure 1 A schematic view of the free body gripper according to an embodiment of the present application;

[0018] Figure 2 A semi-sectional view of the handle assembly according to an embodiment of the present application;

[0019] Figure 3 A semi-sectional view of the clamping device and the tube body according to an embodiment of the present application.

[0020] The various tags in the drawings represent the following:

[0021] 100, free body grabber;

[0022] 10, handle assembly; 11, tube body; 111, sleeve; 112, deformable tube; 113, accommodating cavity; 12, handle; 121, rotating part; 122, handle part; 13, connecting wire; 14, winding part; 15, first limit switch; 151, second sliding groove; 152, first reset spring; 16, second limit switch; 161, connecting part; 162, hinged part; 163, pressing part; 164, second reset spring;

[0023] 20, clamping device; 21, claw grabber; 211, grabber body; 2111, first grabber part; 2112, second grabber part; 212, hook;

[0024] 30, driving assembly; 31, push button; 32, connecting rod; 33, spring; 34, first sliding groove. DETAILED DESCRIPTION

[0025] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it should be understood that the present application can be embodied in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0026] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0027] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments. In the description of the present application, the meaning of "multiple" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0028] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is rotated, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" may include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0029] In the description of the application, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they cannot be understood as limiting the embodiments of the present application.

[0030] In this application, unless otherwise clearly specified and limited, the terms "mount", "connect", "connection", "fix", and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0031] The free body in the joint cavity refers to the foreign matter freely moving in the joint cavity. The free body is usually composed of cartilage, bone tissue, synovial membrane or other tissue fragments. The free body can cause joint pain, swelling and limited activity. The causes of the formation of the free body in the joint cavity are various, including joint injury, joint degenerative disease, synovitis, bone marrow lesion, congenital anomaly, infection and metabolic disease, etc. The presence of the free body in the joint cavity can cause various effects on the body, mainly manifested as pain, joint swelling, limited activity, joint wear, inflammatory reaction and joint locking. Therefore, the free body in the joint cavity can have significant adverse effects on the body. Surgical removal of the free body is one of the effective methods to relieve symptoms.

[0032] However, due to the presence of irregular concave-convex in the joint cavity, the existing surgical equipment is easy to cause the free body to be separated when in the joint cavity, and it is difficult to remove the free body.

[0033] At least to solve the problem that the existing surgical equipment is easy to cause the free body to be separated when in the joint cavity, the embodiments of the present application propose a free body grabbing forceps which can cover the free body so that the free body is not easy to be separated, thereby reducing the difficulty of removing the free body.

[0034] The free body grabbing forceps 100 of the embodiments of the present application will be described below in conjunction with the drawings.

[0035] Figure 1 It is a schematic view of the free body grabbing forceps of the embodiments of the present application; Figure 2 It is a semi-sectional view of the handle assembly of the embodiments of the present application; Figure 3 It is a semi-sectional view of the clamping device and the tube body of the embodiments of the present application.

[0036] In combination with Figure 1 , Figure 2 and Figure 3As shown, the free body grabbing forceps 100 of the embodiment of the present application comprises a handle assembly 10, a clamping device 20 and a driving assembly 30. The clamping device 20 has an open state and a closed state. In the open state, the clamping device 20 is open and used to grab the free body. In the closed state, the clamping device 20 is closed and used to cover the free body. The driving assembly 30 is arranged on the handle assembly 10. The driving assembly 30 is connected with the clamping device 20 and used to drive the clamping device 20 to switch between the open state and the closed state.

[0037] In the surgery by the free body grabbing forceps 100, the driving assembly 30 is used to drive the clamping device 20 to the open state and grab the free body. After the clamping device 20 grabs the free body, the driving assembly 30 is used to drive the clamping device 20 to the closed state. In the closed state, the clamping device 20 covers the free body. Then the clamping device 20 is moved out of the joint cavity, thereby completing the removal of the free body.

[0038] The free body grabbing forceps 100 of the embodiment of the present application can cover the free body when the clamping device 20 is in the closed state, thereby reducing the probability of the free body from being separated, making the free body not easy to be separated, and reducing the difficulty of removing the free body. In addition, the free body can be separated from the joint cavity by the clamping device 20, thereby reducing the probability of the free body contacting the joint cavity when the free body grabbing forceps 100 of the embodiment of the present application is separated from the joint cavity, and reducing the risk of the free body damaging the joint cavity.

[0039] In some embodiments, the clamping device 20 is a mesh structure. The driving assembly 30 comprises a plurality of support bars arranged on the clamping device 20. The clamping device 20 is switched between the open state and the closed state by the opening and closing of the support bars.

[0040] The clamping device 20 can capture a wider range of free bodies by being arranged as a mesh structure, thereby making the clamping device 20 easy to capture the free body. The clamping device 20 can also cover the free body by being arranged as a mesh structure, thereby making the free body not easy to be separated and reducing the difficulty of removing the free body.

[0041] In combination with Figure 1 and Figure 3 As shown, in other embodiments, the clamping device 20 comprises a plurality of claw forceps 21. The plurality of claw forceps 21 are arranged in sequence along the circumferential direction of the handle assembly 10. The plurality of claw forceps 21 are movably connected with the driving assembly 30 and can approach and separate from each other. When the clamping device 20 is in the open state, the plurality of claw forceps 21 separate from each other and are used to grab the free body. When the clamping device 20 is in the closed state, the plurality of claw forceps 21 contact each other and are used to cover the free body.

[0042] When the clamping device 20 is in the open state, the plurality of pincers 21 are separated from each other, so that the clamping device 20 forms a larger opening area, thereby increasing the range of the clamping device 20 to capture the free body, thereby reducing the difficulty of capturing the free body by the clamping device 20.

[0043] When the clamping device 20 is in the closed state, the plurality of pincers 21 are in contact with each other, so that the captured free body can be covered, thereby making the free body not easy to fall off, thereby reducing the difficulty of taking out the free body.

[0044] In addition, by arranging the plurality of pincers 21 along the circumferential direction of the handle assembly 10 in sequence, the clamping force of each pincer 21 on the free body can be close, thereby reducing the probability of the free body falling off due to unbalanced force.

[0045] In combination with Figure 1 and Figure 3 In some embodiments, the pincer 21 includes a pincer body 211 and a hook 212, the first end of the pincer body 211 is movably connected with the driving assembly 30, the second end of the pincer body 211 is connected with the hook 212, and the hook 212 is located inside the pincer body 211 along the inside and outside direction of the handle assembly 10.

[0046] The hook 212 can hook the free body, so that the pincer 21 can more easily capture the free body. By arranging the hook 212 inside the pincer body 211 along the inside and outside direction of the handle assembly 10, the pincer body 211 blocks the hook 212, thereby reducing the probability of the hook 212 contacting the joint, thereby reducing the damage of the hook 212 to the joint.

[0047] In addition, when the clamping device 20 is in the closed state, the plurality of pincers 21 are close to each other and in contact with each other, and the hooks 212 of the plurality of pincers 21 are close to each other, so that the hooks 212 can block the free body, thereby reducing the probability of the free body falling out of the clamping device 20 from the first end, thereby making the free body further not easy to fall off, so as to reduce the difficulty of taking out the free body. Moreover, when the free body has a tendency to fall out of the first end, the hook 212 can hook the free body, thereby further reducing the probability of the free body falling out of the first end, thereby making the free body further not easy to fall off, so as to reduce the difficulty of taking out the free body.

[0048] In combination with Figure 1 and Figure 3As shown, in some embodiments, the plurality of jaw bodies 211 are configured to deform along the inward-outward direction of the handle assembly 10. The plurality of jaw bodies 211 include a first jaw body 2111 having a first end portion and a second jaw body 2112 having a second end portion. From the first end portion to the second end portion, the first jaw body 2111 deforms outwardly away from the first end portion along the inward-outward direction of the handle assembly 10. From the second end portion to the first end portion, the second jaw body 2112 deforms outwardly away from the second end portion along the inward-outward direction of the handle assembly 10.

[0049] When the plurality of jaw bodies 211 encounter uneven structures in the joint cavity, the plurality of jaw bodies 211 are configured to deform along the inward-outward direction of the handle assembly 10, thereby facilitating the movement of the gripping device 20 in the joint cavity, and reducing the difficulty of removing the loose body.

[0050] By deforming the first jaw body 2111 outwardly away from the first end portion along the inward-outward direction of the handle assembly 10, and deforming the second jaw body 2112 outwardly away from the second end portion along the inward-outward direction of the handle assembly 10, the middle portion of the plurality of jaw bodies 211 protrudes outwardly relative to the two end portions along the inward-outward direction of the handle assembly 10. Thus, the connection between the first jaw body 2111 and the second jaw body 2112, or the position near the connection between the first jaw body 2111 and the second jaw body 2112, can provide accommodation space for the loose body, so that when the gripping device 20 is in the contracted state, the plurality of jaw bodies 211 can accommodate the loose body, thereby reducing the probability of the loose body being excessively squeezed, and thus reducing the probability of the loose body being broken. Moreover, by reducing the probability of the loose body being excessively squeezed, the probability of the loose body being squeezed out from between the plurality of jaw bodies 211 can also be reduced.

[0051] In combination Figure 1 and Figure 3 As shown, in some embodiments, the gripping device 20 is movably arranged between an extended position and a retracted position relative to the handle assembly 10. When the gripping device 20 is in the extended position, the gripping device 20 is located outside the handle assembly 10. When the gripping device 20 is in the retracted position, the gripping device 20 is located inside the handle assembly 10.

[0052] When the gripping device 20 is required to grasp and capture the loose body, the gripping device 20 is located in the extended position, and the gripping device 20 is in the open state, thereby grasping and capturing the loose body.

[0053] When the gripping device 20 completes the capturing of the loose body, the gripping device 20 is in the tightened state, and the gripping device 20 is located in the retracted position, thereby enabling the gripping device 20 to be accommodated in the handle assembly 10.

[0054] The free body grabbing forceps 100 of the embodiment can reduce the difficulty of the clamping device 20 from the joint cavity by enabling the handle assembly 10 to accommodate the clamping device 20. Moreover, when the clamping device 20 is in the retracted position, the free body needs to escape from the clamping device 20 first, and then from the handle assembly 10 to successfully escape, thereby greatly increasing the difficulty of the free body to escape, further making the free body difficult to escape, thereby further reducing the difficulty of taking out the free body.

[0055] In addition, since the jaw body 211 can be deformed in the inward and outward directions of the handle assembly 10, the difficulty of the clamping device 20 entering or escaping from the handle assembly 10 can be reduced by the deformation of the jaw body 211.

[0056] In combination with Figure 1 , Figure 2 and Figure 3 , in some embodiments, the handle assembly 10 includes a tube body 11 and a handle 12 connected to each other, the tube body 11 defines an accommodation cavity 113 inside, the clamping device 20 in the retracted position is in contact with the inner wall of the accommodation cavity 113 to make the plurality of jaw clamps 21 contact each other, and the clamping device 20 in the extended position is separated from the inner wall of the accommodation cavity 113 to make the plurality of jaw clamps 21 separate from each other.

[0057] By providing the tube body 11, the clamping device 20 can be controlled to achieve the open state and the tight state through the extended position and the retracted position of the clamping device 20.

[0058] When the clamping device 20 moves from the extended position to the retracted position, the plurality of jaw clamps 21 are close to each other under the compression of the inner wall of the accommodation cavity 113, so that the clamping device 20 changes from the open state to the tight state.

[0059] When the clamping device 20 moves from the retracted position to the extended position, the clamping device 20 gradually separates from the inner wall of the accommodation cavity 113, and the plurality of jaw clamps 21 gradually escape from the compression of the inner wall of the accommodation cavity 113, so that the plurality of jaw clamps 21 are away from each other, thereby making the clamping device 20 change from the tight state to the open state.

[0060] The free body grabbing forceps 100 of the embodiment can reduce the difficulty of the clamping device 20 from the joint cavity by enabling the handle assembly 10 to accommodate the clamping device 20. Moreover, when the clamping device 20 is in the retracted position, the free body needs to escape from the clamping device 20 first, and then from the handle assembly 10 to successfully escape, thereby greatly increasing the difficulty of the free body to escape, further making the free body difficult to escape, thereby further reducing the difficulty of taking out the free body.

[0061] In combination with Figure 1 , Figure 2 andFigure 3 As shown, in some embodiments, the drive assembly 30 includes a push button 31 and a connecting rod 32, part of the connecting rod 32 is arranged in the tube body 11, and the other part of the connecting rod 32 is arranged in the handle 12, one end of the connecting rod 32 is connected to the multiple claws 21, and the other end of the connecting rod 32 is connected to the push button 31, and the push button 31 is movably provided on the handle 12 and is used to drive the clamping device 20 to move between the extended position and the retracted position.

[0062] By pushing the push button 31 , the connecting rod 32 can be driven to move, and the movement of the connecting rod 32 can drive the clamping device 20 to move, so that the clamping device 20 can move between the extended position and the retracted position.

[0063] The push button 31 on the handle 12 can be used to control the clamping device 20 to be in an extended position or a retracted position, and the position of the clamping device 20 can also be used to control the clamping device 20 to be in an open state or a tightened state, thereby achieving control over the clamping device 20. This can reduce the difficulty of operating the loose body grasping forceps 100 of the embodiment of the present application, making the loose body grasping forceps 100 of the embodiment of the present application easy to control.

[0064] like Figure 1 As shown, in some optional embodiments, the handle 12 is provided with a first slide groove 34, and the push button 31 is slidably provided in the first slide groove 34. When the clamping device 20 is in the extended position, the push button 31 is located at one end of the first slide groove 34. When the clamping device 20 is in the retracted position, the push button 31 is located at the other end of the first slide groove 34.

[0065] The push button 31 can be positioned through the first sliding groove 34, so that the clamping device 20 can be accurately located in the extended position and the retracted position, thereby increasing the accuracy of position control of the clamping device 20 and reducing the operating difficulty of the loose body grasping forceps 100 of the embodiment of the application.

[0066] The push button 31 can also be guided by the first sliding groove 34 , so that the movement of the push button 31 is more precise.

[0067] Combine Figure 1 and Figure 2As shown, in some embodiments, the tube body 11 includes a sleeve 111 and a deformation tube 112, one end of the sleeve 111 is connected to the handle 12, and the other end of the sleeve 111 is connected to the deformation tube 112, the handle assembly 10 also includes a connecting wire 13, a winding member 14 and a first limit switch 15, a part of the connecting wire 13 is connected to the deformation tube 112, and the other part of the connecting wire 13 is wound around the winding member 14, the winding member 14 is rotatably provided on the handle 12, and is used to tighten or release the connecting wire 13 to drive the deformation tube 112 to deform, the first limit switch 15 is movably provided on the handle 12 between a first limit position and a first separation position, the first limit switch 15 located at the first limit position is connected to the winding member 14, and limits the rotation of the winding member 14, and the first limit switch 15 located at the first separation position is separated from the winding member 14.

[0068] When the shape of the deformation tube 112 needs to be adjusted, the first limit switch 15 is located in the first separation position, and the winding piece 14 is rotated to tighten or release the connecting wire 13, and the deformation tube 112 is deformed by the tightness of the connecting wire 13. When the winding piece 14 is rotated to a suitable position, the first limit switch 15 is driven to move to the first limit position, so that the first limit switch 15 restricts the rotation of the winding piece 14, so that the connecting wire 13 maintains the current tightness, and the deformation tube 112 maintains its shape.

[0069] By deforming the deformable tube 112, the shape of the deformable tube 112 can adapt to the joint cavity. By adjusting the shape of the deformable tube 112, the angle at which the clamping device 20 is separated from the deformable tube 112 can be fine-tuned, so that the deformable tube 112 and the clamping device 20 can adapt to the environment of the joint cavity.

[0070] Furthermore, the wire winding member 14 is provided with a first tooth portion, the first limit switch 15 located at the first limit position is engaged with the first tooth portion, and the first limit switch 15 located at the first separation position is separated from the wire winding member 14 .

[0071] By providing the first tooth portion, the first limit switch 15 can be more firmly connected to the wire winding member 14 , thereby reducing the probability of abnormal rotation of the wire winding member 14 .

[0072] like Figure 2 As shown, in some specific embodiments, the handle 12 is provided with a second sliding groove 151 , and the first limit switch 15 is slidably provided in the second sliding groove 151 .

[0073] The first limit switch 15 can be guided by the second sliding groove 151 , so that the movement of the first limit switch 15 is more precise.

[0074] like Figure 2As shown, further, the second sliding slot 151 is provided with a first reset spring 152, the first reset spring 152 is located at the side of the first limit switch 15 away from the winding element 14, the first reset spring 152 is in a compressed state, and is used to push the first limit switch 15 to the first limit position.

[0075] When the first limit switch 15 is not subjected to external force, under the action of the elastic force of the first reset spring 152, the first limit switch 15 is in the first limit position, so that the first limit switch 15 can be stably connected with the winding element 14, thereby reducing the probability of the first limit switch 15 being separated from the winding element 14, and further enabling the deformed tube 112 to stably maintain the shape.

[0076] As shown, Figure 2 in some specific embodiments, the connecting line 13 is arranged through the handle 12 and connected with the deformed tube 112. By arranging the connecting line 13 through the handle 12, the connecting line 13 can be pre-installed through the handle 12, thereby increasing the integration of the free body grabbing clamp 100 of the present embodiment.

[0077] In combination with Figure 1 and Figure 2 as shown, in some embodiments, the handle 12 includes a rotating part 121 and a handle part 122, the rotating part 121 is provided with the winding element 14 and the first limit switch 15, the rotating part 121 is connected with the sleeve 111, and along the circumferential direction of the handle assembly 10, the rotating part 121 is rotatably arranged in the handle part 122, the handle assembly 10 further includes a second limit switch 16, the second limit switch 16 is movably arranged in the handle part 122 between a second limit position and a second separation position, the second limit switch 16 in the second limit position is connected with the rotating part 121 and limits the rotation of the rotating part 121, and the second limit switch 16 in the second separation position is separated from the rotating part 121.

[0078] When it is necessary to adjust the rotating part 121, the second limit switch 16 is in the second separation position, the rotating part 121 is driven to rotate, the sleeve 111 and the deformed tube 112 are driven to rotate by the rotating part 121, thereby adjusting the position of the deformed tube 112. When the rotating part 121 is rotated to a suitable position, the second limit switch 16 is in the second limit position, the second limit switch 16 is connected with the rotating part 121 and limits the rotation of the rotating part 121, thereby maintaining the current position of the deformed tube 112.

[0079] The winding element 14, the connecting line 13 and the rotating part 121 can adjust the deformed tube 112 in multiple directions, thereby jointly adjusting the shape and position of the deformed tube 112, and further enabling the deformed tube 112 and the clamping device 20 to adapt to the environment of the joint cavity.

[0080] Furthermore, the rotating portion 121 is provided with a second tooth portion, the second limit switch 16 located at the second limit position is engaged with the second tooth portion, and the second limit switch 16 located at the second separation position is separated from the second tooth portion.

[0081] By providing the second tooth portion, the second limit switch 16 can be more firmly connected to the rotating portion 121 , thereby reducing the probability of accidental rotation of the rotating portion 121 .

[0082] like Figure 2 As shown, in some specific embodiments, the second limit switch 16 includes a connecting portion 161, a hinged portion 162 and a pressing portion 163. The connecting portion 161 and the pressing portion 163 are both connected to the hinged portion 162. The hinged portion 162 is located between the connecting portion 161 and the pressing portion 163, and is hinged to the handle portion 122. A second return spring 164 is provided between the handle portion 122 and the pressing portion 163. The second return spring 164 is in a compressed state and is used to push the pressing portion 163 away from the handle portion 122 to push the connecting portion 161 to the second limit position.

[0083] When the second limit switch 16 is not subjected to external force, under the action of the second return spring 164, the connecting part 161 is in the second limit position and is connected to the rotating part 121, so that the second limit switch 16 can be stably connected to the rotating part 121, thereby reducing the probability of the second limit switch 16 being separated from the rotating part 121, and thus enabling the deformable tube 112 to stably maintain the current position.

[0084] like Figure 2 As shown, in some embodiments, the drive assembly 30 also includes a spring 33, and the push button 31 is movably provided on the handle portion 122. The spring 33 is located in the handle portion 122 and is clamped between the push button 31 and the rotating portion 121. When the clamping device 20 is in the extended position, the spring 33 is in a compressed state and is configured to be able to push the push button 31 to move, so that the clamping device 20 can move from the extended position to the retracted position.

[0085] When the clamping device 20 grabs the loose body, the push button 31 is released. Under the action of the spring 33 on the push button 31, the clamping device 20 can move from the extended position to the retracted position, and switch from the open state to the tightened position, thereby realizing automatic covering of the loose body.

[0086] By providing the spring 33 , automatic protection of the loose body can be achieved, thereby reducing the difficulty of operating the drive assembly 30 .

[0087] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A loose body grasping forceps, characterized in that: include: handle assembly; a clamping device, the clamping device having an open state and a tightened state, wherein the clamping device in the open state is open and used to grasp the loose body, and the clamping device in the tightened state is contracted and used to cover the loose body; A drive assembly is provided on the handle assembly, the drive assembly is connected to the clamping device, and is used to drive the clamping device to switch between the open state and the tightened state.

2. The loose body grasping forceps according to claim 1, characterized in that: The clamping device includes a plurality of claws, which are arranged in sequence along the circumferential direction of the handle assembly. The plurality of claws are movably connected to the drive assembly and can approach and separate from each other. When the clamping device is in the open state, the plurality of claws are separated from each other and are used to grasp the loose body. When the clamping device is in the tightened state, the plurality of claws are in contact with each other and are used to cover the loose body.

3. The loose body grasping forceps according to claim 2, characterized in that: The claw pliers include a pliers body and a hook barb, the first end of the pliers body is movably connected to the drive assembly, the second end of the pliers body is connected to the hook barb, and along the inward and outward direction of the handle assembly, the hook barb is located inside the pliers body.

4. The loose body grasping forceps according to claim 3, characterized in that: The pliers body can be deformed along the inward and outward directions of the handle assembly, and the pliers body includes a first pliers part and a second pliers part connected to each other, the first pliers part has the first end, and the second pliers part has the second end. From the first end to the second end, the first pliers part moves outward away from the first end along the inward and outward directions of the handle assembly, and from the second end to the first end, the second pliers part moves outward away from the second end along the inward and outward directions of the handle assembly.

5. The loose body grasping forceps according to claim 4, characterized in that: The clamping device is movably provided on the handle assembly between an extended position and a retracted position. The clamping device in the extended position is located outside the handle assembly, and the clamping device in the retracted position is located inside the handle assembly.

6. The loose body grasping forceps according to claim 5, characterized in that: The handle assembly includes a tubular body and a handle connected to each other, a receiving cavity is defined in the tubular body, the clamping device in the retracted position contacts the inner wall of the receiving cavity so that the multiple claws contact each other, and the clamping device in the extended position is separated from the inner wall of the receiving cavity so that the multiple claws are separated from each other.

7. The loose body grasping forceps according to claim 6, characterized in that: The driving assembly includes a push button and a connecting rod, part of the connecting rod is arranged in the tube body, and the other part of the connecting rod is arranged in the handle, one end of the connecting rod is connected to the multiple claws, and the other end of the connecting rod is connected to the push button, and the push button is movably arranged on the handle and is used to drive the clamping device to move between the extended position and the retracted position.

8. The loose body grasping forceps according to claim 7, characterized in that: The tube body includes a sleeve and a deformation tube, one end of the sleeve is connected to the handle, and the other end of the sleeve is connected to the deformation tube. The handle assembly also includes a connecting wire, a winding piece and a first limit switch. A part of the connecting wire is connected to the deformation tube, and the other part of the connecting wire is wound around the winding piece. The winding piece is rotatably provided on the handle and is used to tighten or release the connecting wire to drive the deformation of the deformation tube. The first limit switch is movably provided on the handle between a first limit position and a first separation position. The first limit switch located at the first limit position is connected to the winding piece and limits the rotation of the winding piece. The first limit switch located at the first separation position is separated from the winding piece.

9. The loose body grasping forceps according to claim 8, characterized in that: The handle includes a rotating part and a handle part, the rotating part is provided with the wire winding member and the first limit switch, the rotating part is connected to the sleeve, and the rotating part is rotatably provided on the handle part along the circumferential direction of the handle assembly. The handle assembly also includes a second limit switch, which is movably provided on the handle part between a second limit position and a second separation position. The second limit switch located at the second limit position is connected to the rotating part and limits the rotation of the rotating part. The second limit switch located at the second separation position is separated from the rotating part.

10. The loose body grasping forceps according to claim 9, characterized in that: The drive assembly also includes a spring. The push button is movably provided on the handle portion. The spring is located inside the handle portion and is clamped between the push button and the rotating portion. When the clamping device is in the extended position, the spring is in a compressed state and is configured to push the push button to move so that the clamping device can move from the extended position to the retracted position.

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