Reference frame for a bone drill

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, concretely relates to a reference frame for bone drill, mainly used for the length, width of bone drill is calibrated under navigation system, is tracked in real time in the space pose of bone drill in operation, it mainly includes: first connecting part has first connecting piece and first joint piece, second connecting part has second connecting piece and second joint piece, second connecting piece and first connecting piece rotatable connection, frame body is connected with first connecting part or second connecting part, wherein, second connecting part and first connecting part between locking state and release state, under the locking state, first joint piece and second joint piece between each other close to each other, to make the clearance between first connecting part and second connecting part reduce, under the release state, first joint piece and second joint piece between each other away from each other, to make the clearance between first connecting part and second connecting part increase.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a reference frame for bone drills. Background Technology

[0002] A bone drill is a rotary power tool. Its main function is to provide a sufficiently large torque while rotating, thereby enabling surgical operations such as drilling, tapping, screwing, reaming, and grinding the acetabulum. During its use, the surgeon holds the bone drill to perform the surgical operation. Therefore, the surgeon needs to control the direction and depth of the drill bit's entry based on their own experience. If the control is incorrect, it may result in the loss of more unnecessary bone, or even cut into tissues outside the preset angle, damaging surrounding vital organs and causing irreversible damage to the patient, or even endangering their life.

[0003] Therefore, to improve surgical precision, navigation systems have been introduced into clinical practice to work with bone drills and other surgical instruments. Before surgery, an optical reference frame is first connected to the bone drill. Then, the optical navigation system identifies the optical reference frame to determine the length, width, and spatial orientation of the bone drill. This allows for real-time tracking of the bone drill's spatial orientation during surgery, which is then displayed on a screen / AR glasses. This visualization of the surgical path and procedures improves surgical safety and precision. However, existing optical reference frames and bone drills are independent instruments. Therefore, how to connect the optical reference frame and the bone drill is a problem that urgently needs to be solved.

[0004] This utility model addresses the above-mentioned problems by providing a reference frame for bone drills. Utility Model Content

[0005] To overcome the problems mentioned in the background art, the present invention adopts the following technical solution: a reference frame for a bone drill, comprising: a first connecting part having a first connecting member and a first engaging member; a second connecting part having a second connecting member and a second engaging member, the second connecting member being rotatably connected to the first connecting member; a frame body connected to the first connecting part or the second connecting part; wherein the second connecting part and the first connecting part have a locked state and a released state, in the locked state, the first engaging member and the second engaging member are close to each other to reduce the gap between the first connecting part and the second connecting part, and in the released state, the first engaging member and the second engaging member are far apart from each other to increase the gap between the first connecting part and the second connecting part.

[0006] In this embodiment, it further includes a fastener, the fastener portion of which passes through the first connector and connects to the second connector, wherein the fastener is configured to drive the first connector toward and away from the second connector, such that the first connection portion and the second connection portion switch between the locked state and the released state.

[0007] Furthermore, the fastener includes: a screw-on end, a connecting section, and a threaded section connected in sequence; the first coupling includes: a first coupling plate, wherein the first coupling plate has a through hole through which the threaded section of the fastener passes, and the connecting section is partially located within the through hole; the second coupling includes: a second coupling plate, wherein the second coupling plate has a threaded sleeve, and the threaded section is screwed into the threaded sleeve so that when the fastener rotates, the threaded section can move axially in the axial extension direction of the threaded sleeve.

[0008] Furthermore, the diameter of the through hole is larger than the diameter of the connecting segment.

[0009] Furthermore, the threaded sleeve is disposed on the side of the second connecting plate opposite to the first connecting plate.

[0010] Furthermore, the first joining plate and the first connecting portion, as well as the second joining plate and the second connecting portion, are integrally formed.

[0011] In some embodiments of this application, a support arm is further included, the support arm being used to connect the frame to the first connecting portion or the second connecting portion.

[0012] Furthermore, one end of the support arm is fixedly connected to the first connecting portion, and the other end of the support arm is away from the first connecting portion in the length extension direction of the support arm.

[0013] Furthermore, the first connecting portion has a first axis, wherein the length extension direction of the support arm is parallel to the first axis.

[0014] In some embodiments of this application, the support arm and the frame are fixedly connected or detachably connected.

[0015] The beneficial effects of this utility model are: 1. By setting up a first connecting part, a second connecting part, and a frame, the frame is connected to the bone drill through the first connecting part and the second connecting part during use, thereby combining the frame with the existing bone drill instrument. Under the navigation system, the length, width, and spatial position of the drill can be obtained, realizing the visualization of the surgical path and surgical operation, and improving the safety and accuracy of the surgery. 2. By setting fasteners, a first connecting part and a second connecting part, during use, the first connecting part and the second connecting part can be switched between a locked state and a released state by turning the fasteners, so as to facilitate medical personnel to assemble the frame onto the bone drill and disassemble the frame onto the bone drill. 3. By setting a support arm that connects the frame to the first or second connecting part, after the frame is connected to the bone drill through the first or second connecting part, the frame can be kept away from the end of the bone drill, thereby avoiding the frame from affecting the use of surgical instruments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first connector and the second connector of this utility model; Figure 3 This is a schematic diagram of the structure of the first connecting member and the second connecting member in the released state of this utility model; Figure 4 This is a schematic diagram of the fastener structure of this utility model; Figure 5 This is a cross-sectional view of the fastener in the locked state of this utility model; Figure 6 This is a schematic diagram of the frame structure of this utility model; Figure 7 This is a schematic diagram of the support arm and frame of this utility model in a detachable connection. In the figure, 1 is the first connecting part; 11 is the first connecting piece; 12 is the first joining piece; 121 is the first joining plate; 2 is the second connecting part; 21 is the second connecting piece; 22 is the second joining piece; 221 is the second joining plate; 222 is the threaded sleeve; 3 is the frame; 4 is the fastener; 41 is the screwing end; 42 is the connecting section; 43 is the threaded section; 5 is the support arm; 51 is the fixing piece. Detailed Implementation

[0017] The technical solutions of this utility model are clearly and completely described below through specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Figure 1—3 illustrates the main technical content of this embodiment. This specific embodiment provides a reference frame for a bone drill, which includes: a first connecting part 1 having a first connecting member 11 and a first connecting member 12; a second connecting part 2 having a second connecting member 21 and a second connecting member 22, the second connecting member 21 being rotatably connected to the first connecting member 11; and a frame body 3 connected to either the first connecting part 1 or the second connecting part 2. The second connecting part 2 and the first connecting part 1 have a locked state and a released state. In the locked state, the first connecting member 12 and the second connecting member 22 are close to each other, thereby reducing the gap between the first connecting part 1 and the second connecting part 2. In the released state, the first connecting member 12 and the second connecting member 22 are far apart from each other, thereby increasing the gap between the first connecting part 1 and the second connecting part 2.

[0019] In use, firstly, the first connecting part 1 and the second connecting part 2 are adjusted to the released state. Then, the first connecting part 1 and the second connecting part 2 are sleeved on the front end of the bone drill, and the first connecting part 1 and the second connecting part 2 are adjusted to the locked state. At this time, the first connecting part 1, the second connecting part 2 and the bone drill are connected. The frame 3 is located on one side of the bone drill. Then, the frame 3 is identified by the optical navigation surgical system to obtain the length, width and spatial pose of the bone drill, and the information is recorded in the virtual coordinate system to track the spatial pose of the bone drill in real time during the operation.

[0020] refer to Figure 1 More specifically, both the first connecting part 1 and the second connecting part 2 have arc-shaped inner walls, so that after being connected with the bone drill, the inner walls of the first connecting part 1 and the second connecting part 2 can fit more closely to the outer wall of the bone drill.

[0021] Preferably, the inner surfaces of the first connecting part 1 and the second connecting part 2 are provided with a plurality of connecting protrusions. After the first connecting part 1 and the second connecting part 2 are connected to the bone drill, each connecting protrusion can be inserted into the recess on the outer side of the end of the bone drill so that the first connecting part 1 and the second connecting part will not rotate relative to the bone drill, thereby ensuring the stability of the frame during the operation and preventing errors between the frame and the bone drill.

[0022] refer to Figure 1—3. In this embodiment, it also includes: a fastener 4, which passes through the first connector 12 and is connected to the second connector 22. The fastener 4 is configured to drive the first connector 12 toward and away from the second connector 22, so that the first connecting part 1 and the second connecting part 2 can switch between a locked state and a released state. In use, the fastener 4 is tightened manually or with a screwdriver to move the fastener 4 toward the second connector 22. At this time, the fastener 4 abuts against the first connector 12 during the movement, thereby causing the first connector 12 to move toward the second connector 22, so that the first connecting part 1 and the second connecting part 2 are fastened to the outer wall of the bone drill, thereby realizing the connection between the frame 3 and the bone drill.

[0023] refer to Figure 1 —4. More specifically, when the fastener 4 is turned clockwise, the fastener 4 moves toward the second connector 22, and conversely, the fastener 4 moves toward the first connector 12. After the operation, the fastener 4 is turned counterclockwise. At this time, the distance between the first connector 12 and the second connector 22 can be continuously increased, thereby increasing the space between the first connecting part 1 and the second connecting part 2, and thus disassembling the instrument on the bone drill.

[0024] More specifically, the fastener 4 includes a screw-on end 41, a connecting section 42, and a threaded section 43 connected in sequence. The diameter of the screw-on end 41 is larger than the diameter of the connecting section 42 and the threaded section 43. In use, the screw-on end 41 is subjected to force manually or with a screwdriver, thereby enabling the fastener 4 to move toward the first coupling member 12 or the second coupling member 22.

[0025] refer to Figure 1 —5, the first coupling member 12 includes: a first coupling plate 121, wherein the first coupling plate 121 has a through hole, the threaded section 43 of the fastener 4 passes through the through hole, and the connecting section 42 is partially located in the through hole. When the fastener 4 moves toward the first coupling member 12, the screwing end 41 of the fastener 4 abuts against the outer wall of the first coupling plate 121, thereby driving the first coupling plate 121 to move toward the second coupling part.

[0026] The second coupling member 22 includes a second coupling plate 221, wherein a threaded sleeve 222 is disposed on one side of the second coupling plate 221, and a threaded segment 43 is screwed into the threaded sleeve 222 so that when the fastener 4 rotates, the threaded segment 43 can move axially in the axial extension direction of the threaded sleeve 222. In use, after the first connecting part 1 and the second connecting part 2 are sleeved on the front end of the bone drill, the fastener 4 is moved toward the first coupling member 12 by rotating the screwing end 41 of the fastener 4. At this time, the threaded segment 43 is continuously screwed into the threaded sleeve 222. In this way, the space between the first connecting part 1 and the second connecting part 2 is continuously reduced, and then fastened to the front end of the bone drill, thereby realizing the connection between the frame 3 and the bone drill. Conversely, when it is necessary to disassemble the frame 3 and the bone drill, the fastener 4 is rotated in the opposite direction, so that the threaded section 43 is continuously screwed out from the threaded sleeve 222, so that the screw end 41 is disengaged from the first connecting plate 121, thereby releasing the locking state of the first connecting part 1 and the second connecting part 2, thereby realizing the disassembly of the frame 3 and the bone drill.

[0027] More specifically, the diameter of the through hole is larger than the diameter of the connecting section 42. This arrangement allows the connecting section 42 to have more room to move, so that when the fastener 4 rotates, the axis of the connector always coincides with the axis of the threaded sleeve 222, thereby ensuring that the threaded section 43 can be screwed into the threaded sleeve 222 normally.

[0028] More specifically, the threaded sleeve 222 is disposed on the side of the second connecting plate 221 opposite to the first connecting plate 121, so that when the fastener 4 is tightened to the limit, one side of the first connecting plate 121 can fit against one side of the second connecting plate 221, thereby forming a closed space between the first connecting part 1 and the second connecting part 2.

[0029] In this embodiment, the first joining plate 121 and the first connecting part 1, and the second joining plate 221 and the second connecting part 2 are integrally formed.

[0030] refer to Figure 1 and Figure 6 —7. In this embodiment, it further includes: a support arm 5, which is used to connect the frame 3 to the first connecting part 1 or the second connecting part 2; specifically, the support arm 5 is used to connect the frame 3 to the first connecting part 1, wherein one end of the support arm 5 is fixedly connected to the first connecting part 1, and the other end of the support arm 5 is away from the first connecting part 1 in the length extension direction of the support arm 5. In use, the frame 3 is installed on the front end of the bone drill through the first connecting part 1 and the second connecting part 2, thereby forming a connection relationship with the bone drill, so that the bone drill can be recognized by the navigation system.

[0031] More specifically, the first connecting part 1 has a first axis, wherein the length extension direction of the support arm 5 is parallel to the first axis. Under this arrangement, the frame 3 can be moved away from the first connecting part 1 and the second connecting part 2, so that after forming a connection with the bone drill, it can be moved away from the drill bit part of the bone drill, thereby avoiding affecting the use of surgical instruments.

[0032] More specifically, the support arm 5 and the frame 3 are either fixedly connected or detachably connected.

[0033] In this embodiment, the frame 3 and the support arm 5 are integrally formed.

[0034] refer to Figure 1 and Figure 6 —7. In this embodiment, the support arm 5 has a mounting end face, and the frame 3 is disposed on the mounting end face. After the frame 3 is installed on the bone drill through the first connecting part 1 and the second connecting part 2, the support arm 5 and the frame 3 are located on one side of the bone drill and away from the drill bit part of the bone drill. In this way, the optical navigation system can identify the optical frame 3 and know the length, width and spatial pose of the bone drill, and then track the spatial pose of the bone drill in real time during the operation. More specifically, the mounting end face is formed with a mounting groove, wherein a protrusion is provided in the mounting groove, the frame 3 is installed in the mounting groove, and the frame 3 has a groove for the protrusion to extend into. During connection, the frame 3 is assembled in the mounting groove, and the protrusion extends into the groove so that the frame 3 will not move relative to the support arm 5.

[0035] refer to Figure 7 In addition, it also includes a fastener 51, which is detachably connected to the support arm 5. After the frame 3 is assembled into the mounting groove, the fastener 51 is connected to the support arm 5. At this time, the fastener 51 abuts against the outer wall of the frame 3 so that the frame 3 will not come out of the mounting groove. Preferably, the fastener 51 and the support arm 5 are connected by bolts.

[0036] As an explanation, the navigation system involved in this device is an optical navigation system. For this purpose, the frame 3 is equipped with several reflective spheres (NDI optical spheres), which are identified by the optical navigation system to determine the length and width of the surgical instruments and to track the spatial pose of the surgical instruments in real time.

[0037] How to use this utility model: 1. First, adjust the first connecting part and the second connecting part to the released state, and then put the first connecting part and the second connecting part onto the front end of the bone drill. Then, manually or with a screwdriver, tighten the fasteners so that the first connecting part and the second connecting part are fastened to the front end of the bone drill. The frame is located on one side of the bone drill under the action of the support arm. 2. The reflective spheres on the optical frame are identified by the optical navigation surgical system to obtain the length, width and spatial pose of the bone drill, and this information is recorded in the virtual coordinate system to track the spatial pose of the bone drill in real time during the operation. 3. After the surgery, tighten the fasteners again to release the first and second connecting parts, thereby disconnecting them from the bone drill.

[0038] The above description of the embodiments is only for understanding the present invention. It should be noted that those skilled in the art can make several improvements to the present invention without departing from the principle of the present invention, and these improvements will also fall within the protection scope of the claims of the present invention.

Claims

1. A reference frame for a bone drill, characterized in that, It includes a first connecting portion having a first connecting member and a first engaging member; The second connecting part has a second connecting member and a second engaging member, wherein the second connecting member is rotatably connected to the first connecting member; The frame is connected to either the first connecting part or the second connecting part; The second connecting part and the first connecting part have a locked state and a released state. In the locked state, the first connecting member and the second connecting member are close to each other, so that the gap between the first connecting part and the second connecting part is reduced. In the released state, the first connecting member and the second connecting member are far apart from each other, so that the gap between the first connecting part and the second connecting part is increased.

2. The reference frame for bone drills according to claim 1, characterized in that, Also includes: A fastener, wherein the fastener portion passes through the first connector and connects to the second connector, wherein the fastener is configured to drive the first connector toward and away from the second connector, such that the first connection portion and the second connection portion transition between the locked state and the released state.

3. The reference frame for bone drills according to claim 2, characterized in that, The fastener includes: a screw-on end, a connecting section, and a threaded section connected in sequence; The first coupling includes: a first coupling plate, wherein the first coupling plate has a through hole through which the threaded section of the fastener passes and the connecting section is partially located within the through hole; The second coupling includes a second coupling plate having a threaded sleeve, wherein the threaded segment is screwed into the threaded sleeve so that, when the fastener is rotated, the threaded segment is axially movable in the axial extension direction of the threaded sleeve.

4. The reference frame for bone drills according to claim 3, characterized in that, The diameter of the through hole is larger than the diameter of the connecting section.

5. The reference frame for bone drills according to claim 3, characterized in that, The threaded sleeve is disposed on the side of the second joint plate opposite to the first joint plate.

6. The reference frame for bone drills according to claim 3, characterized in that, The first joining plate and the first connecting part, and the second joining plate and the second connecting part are both integrally formed.

7. The reference frame for bone drills according to claim 1, characterized in that, Also includes: A support arm is provided for connecting the reference frame to either the first connecting portion or the second connecting portion.

8. The reference frame for bone drills according to claim 7, characterized in that, One end of the support arm is fixedly connected to the first connecting part, and the other end of the support arm is away from the first connecting part in the length extension direction of the support arm.

9. The reference frame for bone drills according to claim 7, characterized in that, The first connecting portion has a first axis, wherein the length extension direction of the support arm is parallel to the first axis.

10. The reference frame for a bone drill according to any one of claims 7-9, characterized in that, The support arm is either fixedly connected to the frame or detachably connected.

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