Medical head fixing device

Abstract

The invention discloses a medical head fixing device. The head fixing device comprises a fastening assembly (40); the fastening assembly (40) comprises an arc-shaped piece (41), a first protection plate (42), a second protection plate (43), a first pin shaft (44) and a second pin shaft (45). The first protective plate (42) is hinged to one end of the arc-shaped piece (41) through a first pin shaft (44), and the second protective plate (43) is hinged to the other end of the arc-shaped piece (41) through a second pin shaft (45). According to the head fixing device, multi-dimensional adjustment and precise positioning of the spatial position of the fastening assembly can be achieved, so that precise positioning of the spatial position of the head of a patient can be achieved, and then stable fixing of the head of the patient can be achieved; according to the head fixing device, the two ends of the arc-shaped piece of the fastening assembly can be tightly attached to the surface of the head of a patient at the same time, and then the head of the patient is stably fixed.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly relates to a medical head fixation device. Background Art

[0002] In clinical practice, when an operation needs to be performed on a patient's left ear or right ear, it is necessary for the patient's head to remain stationary throughout the operation. However, it is very difficult for the patient to keep their head completely stationary, and the patient's head often moves during the operation, thus affecting the progress of the ear operation. Therefore, in order to ensure the smooth progress of the ear operation, it is necessary to use a special head fixation device to keep the patient's head stationary.

[0003] Currently, the existing head fixation devices have the following defects and deficiencies: First, the existing head fixation devices are provided with a generally arc-shaped head fixing frame. When one end of the head fixing frame closely adheres to the surface of the patient's head, the other end often forms a gap with the surface of the patient's head, and it is very difficult to make both ends of the head fixing frame closely adhere to the surface of the patient's head simultaneously, thus unable to achieve stable fixation of the head; Second, the existing head fixation devices are difficult to be applicable to the heads of patients with different shapes and sizes. For different patients, such as adults or children, there are obvious differences in the shapes and sizes of their heads. For heads with different shapes and sizes, the existing head fixation devices are difficult to achieve stable fixation of the head; Third, for the existing head fixation devices, the position adjustment of the head fixing frame is often difficult, and it is difficult to flexibly adjust the position of the head fixing frame in three dimensions. Summary of the Invention

[0004] The purpose of the present invention is to provide a medical head fixation device to overcome the above-mentioned defects and deficiencies of the prior art.

[0005] )]]To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A medical head fixation device, the head fixation device includes a fastening assembly; the fastening assembly includes an arc-shaped member, a first guard plate, a second guard plate, a first pin shaft, and a second pin shaft; the first guard plate is hinged to one end of the arc-shaped member through the first pin shaft, and the second guard plate is hinged to the other end of the arc-shaped member through the second pin shaft.

[0007] Preferably, the arc-shaped member is in the shape of an arch bridge, and a straight plate portion is provided at the middle position thereof. A fifth threaded hole is provided at the middle position of the straight plate portion. At one end of the arc-shaped member, a first bushing portion and a second bushing portion are fixedly provided. Both the first bushing portion and the second bushing portion are cylindrical, and a first gap is provided between them. A circular first through hole is provided inside the first bushing portion, and a circular second through hole is provided inside the second bushing portion. The central axes of the first through hole and the second through hole are located on the same straight line. At the other end of the arc-shaped member, a third bushing portion and a fourth bushing portion are fixedly provided. Both the third bushing portion and the fourth bushing portion are cylindrical, and a second gap is provided between them. A circular third through hole is provided inside the third bushing portion, and a circular fourth through hole is provided inside the fourth bushing portion. The central axes of the third through hole and the fourth through hole are located on the same straight line. The first guard plate and the second guard plate are both slender arc-shaped segments. The first guard plate includes a first convex portion, a first main body portion, and a first flexible pad. The second guard plate includes a second convex portion, a second main body portion, and a second flexible pad. Both the first main body portion and the second main body portion are arc-shaped plates, and their radii of curvature are equal. The first convex portion is fixedly provided on the outer arc surface of the first main body portion, and a circular fifth through hole is provided in the first main body portion. The axis of the fifth through hole is perpendicular to the tangent of the first main body portion at the position where the first convex portion is located. The first flexible pad is fixedly provided on the inner arc surface of the first main body portion, and the shape and size of the first flexible pad are both adapted to the first main body portion. The second convex portion is fixedly provided on the outer arc surface of the second main body portion, and a circular sixth through hole is provided in the second main body portion. The axis of the sixth through hole is perpendicular to the tangent of the second main body portion at the position where the second convex portion is located. The second flexible pad is fixedly provided on the inner arc surface of the second main body portion, and the shape and size of the second flexible pad are both adapted to the second main body portion. The first convex portion of the first guard plate is disposed in the first gap, and the first pin shaft sequentially passes through the first through hole, the fifth through hole, and the second through hole, so that the first guard plate is hinged to one end of the arc-shaped member. The second convex portion of the second guard plate is disposed in the second gap, and the second pin shaft sequentially passes through the third through hole, the sixth through hole, and the fourth through hole, so that the second guard plate is hinged to the other end of the arc-shaped member.

[0008] Preferably, the head fixing device further includes a cross beam and an adjusting component; the cross beam includes a cylindrical cross bar, and a first threaded hole penetrating through the cross bar is provided at one end of the cross bar close to the cross bar; the adjusting component includes a fourth bolt knob, a first nut and a second nut; the screw part of the fourth bolt knob penetrates into the first threaded hole of the cross beam, and the external thread of the screw part of the fourth bolt knob can be engaged with the internal thread of the first threaded hole; the lower end of the screw part of the fourth bolt knob penetrating out of the first threaded hole sequentially penetrates into the first nut, the fifth threaded hole of the arc-shaped part and the second nut, and the external thread of the screw part of the fourth bolt knob can be engaged with the internal threads of the first nut, the fifth threaded hole of the arc-shaped part and the second nut, so that the lower end of the screw part of the fourth bolt knob is fixedly connected to the arc-shaped part, and the extending direction of the straight plate part of the arc-shaped part is perpendicular to the extending direction of the cross bar of the cross beam; by means of the threaded connection between the screw part of the fourth bolt knob and the first threaded hole, the fourth bolt knob can be moved downward or upward relative to the cross bar by rotating the fourth bolt knob, thereby driving the fastening component to move downward or upward.

[0009] Preferably, the head fixation device further includes a support assembly and a connection assembly; the support assembly includes a column, a connecting rod, a U-shaped member, and a third bolt knob; the column is cylindrical; the lower end of the column is fixedly connected to one end of the connecting rod, and the column and the connecting rod are fixedly connected to form an L-shaped structure; the other end of the connecting rod is fixedly connected to the outer surface of the closed end of the U-shaped member; the connection assembly includes a first cylindrical member, a second cylindrical member, a first bolt knob, and a second bolt knob; the inside of the first cylindrical member is hollow and provided with a circular cylindrical first cavity, and a third threaded hole is provided on one side wall of the first cylindrical member, and the third threaded hole communicates with the first cavity; the inside of the second cylindrical member is hollow and provided with a circular cylindrical second cavity, and a fourth threaded hole is provided on one side wall of the second cylindrical member, and the fourth threaded hole communicates with the second cavity; the first cylindrical member and the second cylindrical member are fixedly connected, and their central axes are perpendicular to each other, so that the two are in a "cross" shape as a whole; the crossbar of the crossbeam penetrates into the second cavity of the second cylindrical member, the outer diameter of the crossbar matches the inner diameter of the second cavity, and the crossbar can slide relative to the second cylindrical member; the column of the support assembly penetrates into the first cavity of the first cylindrical member, the outer diameter of the column matches the inner diameter of the first cavity, and the column can slide relative to the first cylindrical member; the crossbar of the crossbeam is arranged in the horizontal direction, and the column of the support assembly is arranged in the vertical direction; the screw part of the first bolt knob is arranged in the third threaded hole, the external thread of the screw part of the first bolt knob meshes with the internal thread of the third threaded hole, and the inner end of the screw part of the first bolt knob abuts against the column to realize the fixed connection between the column and the first cylindrical member; the screw part of the second bolt knob is arranged in the fourth threaded hole, the external thread of the screw part of the second bolt knob meshes with the internal thread of the fourth threaded hole, and the inner end of the screw part of the second bolt knob abuts against the crossbar to realize the fixed connection between the crossbar and the second cylindrical member.

[0010] Preferably, the U-shaped member includes an upper arm plate, a main body plate, and a lower arm plate, and the upper arm plate, the main body plate, and the lower arm plate are fixedly connected in sequence to form a U-shaped structure; the open end of the U-shaped member faces away from the connecting rod; a wedge-shaped part is fixedly arranged at the open end of the U-shaped member; the wedge-shaped part is fixedly arranged at the outer edge of the upper arm plate, the cross section of the wedge-shaped part is triangular, and the wedge-shaped part extends downward so that the upper arm plate, the wedge-shaped part, and the main body plate form an upward concave groove; a circular second threaded hole is provided on the lower arm plate; the screw part of the third bolt knob penetrates vertically upward into the second threaded hole, and the external thread of the screw part of the third bolt knob meshes with the internal thread of the second threaded hole. By rotating the knob part of the third bolt knob, the third bolt knob can move up and down vertically relative to the lower arm plate of the U-shaped member.

[0011] Preferably, the support assembly further includes a base, and the lower end of the column is fixedly connected to one end of the connecting rod through the base; the base is in a cuboid or cube shape, the upper surface of the base is fixedly connected to the lower end of the column, and one side surface of the base is fixedly connected to one end of the connecting rod.

[0012] Preferably, the connecting rod is in a cylindrical shape; at the connection between the connecting rod and the U-shaped member, a first reinforcing plate and a second reinforcing plate are fixedly provided. The first reinforcing plate and the second reinforcing plate have the same shape and are both in a right-angled triangle shape. The first reinforcing plate and the second reinforcing plate are symmetrically arranged on the upper and lower sides of the connecting rod; one right-angled side of the first reinforcing plate is fixedly connected to the side surface of the connecting rod, and the other right-angled side is fixedly connected to the outer surface of the closed end of the U-shaped member; one right-angled side of the second reinforcing plate is fixedly connected to the side surface of the connecting rod, and the other right-angled side is fixedly connected to the outer surface of the closed end of the U-shaped member. The first reinforcing plate and the second reinforcing plate are used to improve the fixed connection strength between the connecting rod and the U-shaped member.

[0013] Preferably, a scale is provided on both the cross bar and the column; at the end of the cross bar away from the first threaded hole, a first flange surrounding the cross bar for one week is provided, and the first flange can play a limiting role on the cross bar; at the upper end of the column, a detachable second flange surrounding the column for one week is provided, and the second flange can play a limiting role on the column.

[0014] Preferably, the outer shapes of the first cylindrical member and the second cylindrical member are both in a cuboid shape; chamfers are provided at the corners of the first cylindrical member and the second cylindrical member; the first cylindrical member and the second cylindrical member are fixedly connected through a connecting portion.

[0015] Preferably, a third flange is fixedly provided at one end of the first pin shaft, and an external thread is provided at the other end. The first nut is sleeved on the free end of the first pin shaft, and the internal thread of the first nut meshes with the external thread of the free end of the first pin shaft. The third flange and the first nut both play a limiting role to prevent the first pin shaft from falling off; a fourth flange is fixedly provided at one end of the second pin shaft, and an external thread is provided at the other end. The second nut is sleeved on the free end of the second pin shaft, and the internal thread of the second nut meshes with the external thread of the free end of the second pin shaft. The fourth flange and the second nut both play a limiting role to prevent the second pin shaft from falling off.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The skull fixing device of the present invention can realize multi-dimensional adjustment and precise positioning of the spatial position of the fastening assembly, thereby can realize precise positioning of the spatial position of the patient's skull, and further can realize stable fixation of the patient's skull;

[0018] (2) The head fixation device of the present invention can enable both ends of the arc-shaped member of the fastening assembly to closely fit the surface of the patient's head simultaneously, thereby achieving stable fixation of the patient's head.

[0019] (3) The head fixation device of the present invention can be applicable to the heads of patients with different shapes and sizes.

[0020] (4) The head fixation device of the present invention can play a protective role for the patient's head. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following further elaborates on the specific embodiments of the present invention with reference to the accompanying drawings.

[0022] Figure 1 It is a three-dimensional schematic diagram of the medical head fixation device provided by the embodiment of the present invention;

[0023] Figure 2 It is an exploded schematic diagram of the medical head fixation device provided by the embodiment of the present invention;

[0024] Figure 3 It is a three-dimensional schematic diagram of the arc-shaped member of the medical head fixation device provided by the embodiment of the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of the guard plate of the medical head fixation device provided by the embodiment of the present invention;

[0026] Figure 5 It is a partial exploded view of the position of the connection assembly of the medical head fixation device provided by the embodiment of the present invention;

[0027] Figure 6 It is a three-dimensional schematic diagram of the support assembly of the medical head fixation device provided by the embodiment of the present invention;

[0028] Figure 7 It is a partial enlarged schematic diagram of the support assembly of the medical head fixation device provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To more clearly illustrate the present invention, the following further describes the present invention with reference to preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0030] As Figure 1 、 Figure 2 shown, this embodiment provides a medical head fixation device, which includes a cross beam 10, a support assembly 20, a connection assembly 30, a fastening assembly 40, and an adjustment assembly 50.

[0031] As Figure 2As shown, the crossbeam 10 includes a cylindrical crossbar 11. At one end of the crossbar 11 (the left end shown in the figure), a first threaded hole 12 penetrating the crossbar 11 is provided. At the other end of the crossbar 11 (i.e., the end far from the first threaded hole 12, the right end shown in the figure), a first flange 13 surrounding the crossbar 11 for one week is provided.

[0032] As Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the support assembly 20 includes a column 21, a base 22, a connecting rod 23, a U-shaped member 24, and a third bolt knob 25; the column 21 is cylindrical, and at its upper end, a detachable second flange 26 surrounding the column 21 for one week is provided; the connecting rod 23 is cylindrical; the lower end of the column 21 is fixedly connected to one end of the connecting rod 23 through the base 22, and the column 21 and the connecting rod 23 are fixedly connected into an L-shaped structure; the other end of the connecting rod 23 is fixedly connected to the outer surface of the closed end of the U-shaped member 24.

[0033] In this embodiment, the base 22 is rectangular or cubic. The upper surface of the base 22 is fixedly connected to the lower end of the column 21, and one side surface of the base 22 is fixedly connected to one end of the connecting rod 23. In a preferred implementation manner of this embodiment, first reinforcing plates 23-1 and second reinforcing plates 23-2 are fixedly provided at the connection between the connecting rod 23 and the U-shaped member 24. The first reinforcing plates 23-1 and the second reinforcing plates 23-2 have the same shape and are both right-angled triangles. The first reinforcing plates 23-1 and the second reinforcing plates 23-2 are symmetrically arranged on the upper and lower sides of the connecting rod 23; one right-angled side of the first reinforcing plate 23-1 is fixedly connected to the side surface of the connecting rod 23, and its other right-angled side is fixedly connected to the outer surface of the closed end of the U-shaped member 24; one right-angled side of the second reinforcing plate 23-2 is fixedly connected to the side surface of the connecting rod 23, and its other right-angled side is fixedly connected to the outer surface of the closed end of the U-shaped member 24. The first reinforcing plates 23-1 and the second reinforcing plates 23-2 are used to improve the fixed connection strength between the connecting rod 23 and the U-shaped member 24.

[0034] The U-shaped part 24 includes an upper arm plate 24-1, a main body plate 24-2, and a lower arm plate 24-3. The upper arm plate 24-1, the main body plate 24-2, and the lower arm plate 24-3 are fixedly connected in sequence to form a U-shaped structure. The open end of the U-shaped part 24 faces away from the connecting rod 23. A wedge part 24-5 is fixedly arranged at the open end of the U-shaped part 24. The wedge part 24-5 is fixedly arranged at the outer edge of the upper arm plate 24-1 (i.e., the edge far from the main body plate 24-2). The cross-section of the wedge part 24-5 is triangular, and the wedge part 24-5 extends downward, so that the upper arm plate 24-1, the wedge part 24-5, and the main body plate 24-2 form an upwardly concave groove. A circular second threaded hole 24-4 is provided on the lower arm plate 24-3. The screw part of the third bolt knob 25 penetrates vertically upward into the second threaded hole 24-4, and the external thread of the screw part of the third bolt knob 25 meshes with the internal thread of the second threaded hole 24-4. By rotating the knob part of the third bolt knob 25, the third bolt knob 25 can move up and down vertically relative to the lower arm plate 24-3 of the U-shaped part 24.

[0035] As Figure 1 , Figure 2 and Figure 5 shown, the connection assembly 30 includes a first cylindrical part 31, a second cylindrical part 32, a first bolt knob 34, and a second bolt knob 35. The outer shapes of the first cylindrical part 31 and the second cylindrical part 32 are both rectangular parallelepiped-shaped. The inside of the first cylindrical part 31 is hollow and is provided with a circular cylindrical first cavity 31-1. A third threaded hole 31-2 is provided on one side wall of the first cylindrical part 31, and the third threaded hole 31-2 communicates with the first cavity 31-1. The inside of the second cylindrical part 32 is hollow and is provided with a circular cylindrical second cavity 32-1. A fourth threaded hole 32-2 is provided on one side wall of the second cylindrical part 32, and the fourth threaded hole 32-2 communicates with the second cavity 32-1. The first cylindrical part 31 is fixedly connected to the second cylindrical part 32, and their central axes are perpendicular to each other, so that the whole of them is in a "cross" shape. In a preferred embodiment of this embodiment, chamfers are provided at the corners of the first cylindrical part 31 and the second cylindrical part 32. In a preferred embodiment of this embodiment, the first cylindrical part 31 and the second cylindrical part 32 are fixedly connected through a connecting part 33.

[0036] The crossbar 11 of the crossbeam 10 penetrates into the second cavity 32-1 of the second cylindrical member 32. The outer diameter of the crossbar 11 matches the inner diameter of the second cavity 32-1, and the crossbar 11 can slide relative to the second cylindrical member 32. In this case, the first flange 13 can limit the crossbar 11; the upright column 21 of the support assembly 20 penetrates into the first cavity 31-1 of the first cylindrical member 31. The outer diameter of the upright column 21 matches the inner diameter of the first cavity 31-1, and the upright column 21 can slide relative to the first cylindrical member 31. In this case, the second flange 26 can limit the upright column 21. In this embodiment, the crossbar 11 of the crossbeam 10 is arranged horizontally, and the upright column 21 of the support assembly 20 is arranged vertically. The screw part of the first bolt knob 34 is arranged in the third threaded hole 31-2. The external thread of the screw part of the first bolt knob 34 meshes with the internal thread of the third threaded hole 31-2, and the inner end head of the screw part of the first bolt knob 34 abuts against the upright column 21, realizing the fixed connection between the upright column 21 and the first cylindrical member 31; the screw part of the second bolt knob 35 is arranged in the fourth threaded hole 32-2. The external thread of the screw part of the second bolt knob 35 meshes with the internal thread of the fourth threaded hole 32-2, and the inner end head of the screw part of the second bolt knob 35 abuts against the crossbar 11, realizing the fixed connection between the crossbar 11 and the second cylindrical member 32. In this embodiment, the outer contours of the knob parts of the first bolt knob 34 and the second bolt knob 35 are both in the shape of, for example, a hexagonal prism. In a preferred manner of this embodiment, scale marks are provided on both the crossbar 11 and the upright column 21, so that users such as doctors can know the moving amounts of the crossbar 11 and the upright column 21 during actual operation.

[0037] Such as Figure 1 , Figure 2 , Figure 3 And Figure 4As shown, the fastening assembly 40 includes an arc-shaped member 41, a first guard plate 42, a second guard plate 43, a first pin shaft 44, and a second pin shaft 45. The first guard plate 42 is hinged to one end of the arc-shaped member 41 through the first pin shaft 44, and the second guard plate 43 is hinged to the other end of the arc-shaped member 41 through the second pin shaft 45. The arc-shaped member 41 is in the shape of an arch bridge, and a straight plate portion 41-1 is provided at its middle position (i.e., the top of the arch bridge). A fifth threaded hole 41-2 is provided at the middle position of the straight plate portion 41-1. A first bushing portion 41-3 and a second bushing portion 41-4 are fixedly provided at one end of the arc-shaped member 41. Both the first bushing portion 41-3 and the second bushing portion 41-4 are cylindrical, and a first gap 41-5 is provided between them. A circular first through hole 41-3-1 is provided inside the first bushing portion 41-3, and a circular second through hole 41-4-1 is provided inside the second bushing portion 41-4. The central axes of the first through hole 41-3-1 and the second through hole 41-4-1 are on the same straight line. A third bushing portion 41-6 and a fourth bushing portion 41-7 are fixedly provided at the other end of the arc-shaped member 41. Both the third bushing portion 41-6 and the fourth bushing portion 41-7 are cylindrical, and a second gap 41-8 is provided between them. A circular third through hole 41-6-1 is provided inside the third bushing portion 41-6, and a circular fourth through hole 41-7-1 is provided inside the fourth bushing portion 41-7. The central axes of the third through hole 41-6-1 and the fourth through hole 41-7-1 are on the same straight line.

[0038] As Figure 1 , Figure 2 , Figure 5As shown, both the first guard plate 42 and the second guard plate 43 are slender arc segments; the first guard plate 42 includes a first convex portion 42-1, a first main body portion 42-2, and a first flexible pad 42-3; the second guard plate 43 includes a second convex portion 43-1, a second main body portion 43-2, and a second flexible pad 43-3; both the first main body portion 42-2 and the second main body portion 43-2 are arc-shaped plates, and their radii of curvature are equal; the first convex portion 42-1 is fixedly arranged on the outer arc surface of the first main body portion 42-2, and a circular fifth through hole 42-4 is arranged on the first main body portion 42-2, and the axis of the fifth through hole 42-4 is perpendicular to the tangent line of the first main body portion 42-2 at the position where the first convex portion 42-1 is located; the first flexible pad 42-3 is fixedly arranged on the inner arc surface of the first main body portion 42-2, and the shape and size of the first flexible pad 42-3 are both adapted to the first main body portion 42-2; the second convex portion 43-1 is fixedly arranged on the outer arc surface of the second main body portion 43-2, and a circular sixth through hole 43-4 is arranged on the second main body portion 43-2, and the axis of the sixth through hole 43-4 is perpendicular to the tangent line of the second convex portion 43-1 at the position where the second convex portion 43-1 is located; the second flexible pad 43-3 is fixedly arranged on the inner arc surface of the second main body portion 43-2, and the shape and size of the second flexible pad 43-3 are both adapted to the second main body portion 43-2. In this embodiment, the materials of the first flexible pad 42-3 and the second flexible pad 43-3 are both preferably silicone (such as silicone with a Shore hardness of 30HA), and their thicknesses are both preferably 3±0.5mm.

[0039] The first convex portion 42-1 of the first guard plate 42 is disposed within the first gap 41-5. The first pin shaft 44 sequentially passes through the first through hole 41-3-1, the fifth through hole 42-4, and the second through hole 41-4-1, such that the first guard plate 42 is hinged to one end of the arc-shaped member 41. The second convex portion 43-1 of the second guard plate 43 is disposed within the second gap 41-8. The second pin shaft 45 sequentially passes through the third through hole 41-6-1, the sixth through hole 43-4, and the fourth through hole 41-7-1, such that the second guard plate 43 is hinged to the other end of the arc-shaped member 41. In a preferred embodiment of the present embodiment, a third flange 48 is fixedly provided at one end of the first pin shaft 44, and an external thread is provided at the other end thereof. The first nut 46 is sleeved on the free end of the first pin shaft 44 (i.e., the end away from the third flange 48), and the internal thread of the first nut 46 meshes with the external thread of the free end of the first pin shaft 44. Both the third flange 48 and the first nut 46 function as limiters to prevent the first pin shaft 44 from falling off. A fourth flange 49 is fixedly provided at one end of the second pin shaft 45, and an external thread is provided at the other end thereof. The second nut 47 is sleeved on the free end of the second pin shaft 45 (i.e., the end away from the fourth flange 49), and the internal thread of the second nut 47 meshes with the external thread of the free end of the second pin shaft 45. Both the fourth flange 49 and the second nut 47 function as limiters to prevent the second pin shaft 45 from falling off.

[0040] As Figure 1 , Figure 2 shown, the adjustment assembly 50 includes a fourth bolt knob 51, a first nut 52, and a second nut 53. The screw portion of the fourth bolt knob 51 passes through the first threaded hole 12 of the cross beam 10, and the external thread of the screw portion of the fourth bolt knob 51 can mesh with the internal thread of the first threaded hole 12. The lower end of the screw portion of the fourth bolt knob 51 passing through the first threaded hole 12 sequentially passes through the first nut 52, the fifth threaded hole 41-2 of the arc-shaped member 41, and the second nut 53 (the first nut 52 and the second nut 53 are respectively located on the upper and lower sides of the straight plate portion 41-1 of the arc-shaped member 41). The external thread of the screw portion of the fourth bolt knob 51 can mesh with the internal threads of the first nut 52, the fifth threaded hole 41-2 of the arc-shaped member 41, and the second nut 53, such that the lower end of the screw portion of the fourth bolt knob 51 is fixedly connected to the arc-shaped member 41, and the extending direction of the straight plate portion 41-1 of the arc-shaped member 41 is perpendicular to the extending direction of the cross bar 11 of the cross beam 10. By means of the threaded connection between the screw portion of the fourth bolt knob 51 and the first threaded hole 12, by rotating the fourth bolt knob 51, the fourth bolt knob 51 can be moved downward or upward relative to the cross bar 11, thereby driving the fastening assembly 40 to move downward (i.e., closer to the patient's head) or upward (i.e., away from the patient's head).

[0041] In this embodiment, a knob portion is fixedly provided at one end of the screw portion of the fourth bolt knob 51. The knob portion is, for example, in the shape of a petal blooming like a regular hexagon, and any two adjacent petals are smoothly transitionally connected for the user to grip.

[0042] As Figure 1 , Figure 2 shown, during use, the U-shaped member 24 of the support assembly 20 is engaged with the side frame 61 of the medical bed 60, and the U-shaped member 24 of the support assembly 20 is fixedly connected to the side frame 61 of the medical bed 60 by the third bolt knob 25. Specifically, the open end of the U-shaped member 24 of the support assembly 20 is engaged with the side frame 61 of the medical bed 60. The outer surface of the side frame 61 is mutually attached to the inner surface of the main body plate 24-2 of the U-shaped member 24. By rotating the third bolt knob 25, the upper end head of the screw portion of the third bolt knob 25 abuts against the lower end surface of the side frame 61. The upper end surface of the side frame 61 is engaged in the groove formed by the upper arm plate 24-1, the wedge portion 24-5, and the main body plate 24-2 of the U-shaped member 24, and the wedge portion 24-5 plays a limiting role on the side frame 61 to prevent the side frame 61 from disengaging from the open end of the U-shaped member 24, thereby realizing the fixed connection between the support assembly 20 and the side frame 61 of the medical bed 60.

[0043] The usage method and advantages of the skull fixation device of this embodiment are introduced as follows:

[0044] First, the head fixation device of this embodiment can achieve multi-dimensional adjustment and precise positioning of the spatial position of the fastening component 40, thereby enabling precise positioning of the spatial position of the patient's head, and further enabling firm fixation of the patient's head. During the clinical implementation process, the user, such as a doctor, rotates the first bolt knob 34, the second bolt knob 35, the fourth bolt knob 51, and the third bolt knob 25 to achieve precise adjustment and control of the spatial position of the fastening component 40, thereby achieving precise adjustment and control of the position of the patient's head. Specifically, during a clinical operation, the patient lies on the medical bed in a lateral position according to the required body side orientation during the operation. The user, such as a doctor, first rotates the first bolt knob 34 of the adjustment connection component 30 and slides the connection component 30 up or down along the column 21 of the support component 20 to a suitable position, thereby determining the height position of the connection component 30 (or the fastening component 40) relative to the medical bed (i.e., determining the coordinate along the Z-axis); then rotates the second bolt knob 35 of the adjustment connection component 30 and slides the cross bar 11 left or right along the cross beam 10 to a suitable position, thereby determining the horizontal position of the fastening component 40 (i.e., determining the coordinate along the X-axis); then rotates the third bolt knob 25 of the support component 20 and slides the support component 20 forward or backward along the side frame 61 of the medical bed 60 to a suitable position, thereby determining the front-back position of the fastening component 40 (i.e., determining the coordinate along the Y-axis). Through the above method, the coordinate position (X, Y, Z) of the fastening component 40 of the above head fixation device in the three-dimensional space is determined, thereby achieving precise positioning of the spatial position of the patient's head.

[0045] Second, the head fixation device of this embodiment can achieve that both ends of the arc-shaped member 41 of the fastening component 40 are closely attached to the surface of the patient's head at the same time, and further achieve firm fixation of the patient's head. The first flexible pad 42-3 of the first guard plate 42 and the second flexible pad 43-3 of the second guard plate 43 of the fastening component 40 are in direct contact with the patient's head. By adjusting the direction and angle of the first guard plate 42 and the second guard plate 43 relative to the arc-shaped member 41 (i.e., the first guard plate 42 rotates around the first pin shaft 44, and the second guard plate 43 rotates around the second pin shaft 45), the first flexible pad 42-3 of the first guard plate 42 and the second flexible pad 43-3 of the second guard plate 43 can be closely attached to the surface of the patient's head at the same time, and further achieve firm fixation of the patient's head.

[0046] Third, the head fixation device of this embodiment can be applied to patient heads with different shapes and sizes. Since the direction and angle of the first guard plate 42 and the second guard plate 43 relative to the arc-shaped member 41 are adjustable, it is ensured that the first flexible pad 42-3 of the first guard plate 42 and the second flexible pad 43-3 of the second guard plate 43 can be closely attached to the surface of the patient's head at the same time. Therefore, the head fixation device of this embodiment can be applied to patient heads with different shapes and sizes.

[0047] Fourth, the head fixation device of this embodiment can protect the patient's head. The materials of the first flexible pad 42-3 and the second flexible pad 43-3 that are in direct contact with the patient's head are both made of silicone with a certain elasticity and flexibility. Therefore, during use, the first flexible pad 42-3 and the second flexible pad 43-3 can buffer a certain amount of stress and play a protective role for the patient's head.

Claims

1. A medical head fixation device, characterized in that, The head fixation device includes a fastening assembly (40); the fastening assembly (40) includes an arc-shaped member (41), a first guard plate (42), a second guard plate (43), a first pin shaft (44), and a second pin shaft (45); the first guard plate (42) is hinged to one end of the arc-shaped member (41) through the first pin shaft (44), and the second guard plate (43) is hinged to the other end of the arc-shaped member (41) through the second pin shaft (45).

2. The medical head fixation device according to claim 1, characterized in that, The arc-shaped member (41) is in the shape of an arch bridge, and a straight plate portion (41-1) is provided at the middle position thereof, and a fifth threaded hole (41-2) is provided at the middle position of the straight plate portion (41-1); a first bushing portion (41-3) and a second bushing portion (41-4) are fixedly provided at one end of the arc-shaped member (41), both the first bushing portion (41-3) and the second bushing portion (41-4) are in the shape of a cylinder and a first gap (41-5) is provided between them, a circular first through hole (41-3-1) is provided inside the first bushing portion (41-3), a circular second through hole (41-4-1) is provided inside the second bushing portion (41-4), and the central axes of the first through hole (41-3-1) and the second through hole (41-4-1) are on the same straight line; a third bushing portion (41-6) and a fourth bushing portion (41-7) are fixedly provided at the other end of the arc-shaped member (41), both the third bushing portion (41-6) and the fourth bushing portion (41-7) are in the shape of a cylinder and a second gap (41-8) is provided between them, a circular third through hole (41-6-1) is provided inside the third bushing portion (41-6), a circular fourth through hole (41-7-1) is provided inside the fourth bushing portion (41-7), and the central axes of the third through hole (41-6-1) and the fourth through hole (41-7-1) are on the same straight line; The first guard plate (42) and the second guard plate (43) are both elongated arc-shaped segments; the first guard plate (42) includes a first convex portion (42-1), a first main body portion (42-2), and a first flexible pad (42-3); the second guard plate (43) includes a second convex portion (43-1), a second main body portion (43-2), and a second flexible pad (43-3); both the first main body portion (42-2) and the second main body portion (43-2) are arc-shaped plates, and their radii of curvature are equal; the first convex portion (42-1) is fixedly arranged on the outer arc surface of the first main body portion (42-2), and a circular fifth through hole (42-4) is arranged on the first main body portion (42-2), and the axis of the fifth through hole (42-4) is perpendicular to the tangent line of the first main body portion (42-2) at the position where the first convex portion (42-1) is located; the first flexible pad (42-3) is fixedly arranged on the inner arc surface of the first main body portion (42-2), and the shape and size of the first flexible pad (42-3) are both adapted to the first main body portion (42-2); the second convex portion (43-1) is fixedly arranged on the outer arc surface of the second main body portion (43-2), and a circular sixth through hole (43-4) is arranged on the second main body portion (43-2), and the axis of the sixth through hole (43-4) is perpendicular to the tangent line of the second convex portion (43-1) at the position where the second convex portion (43-1) is located; the second flexible pad (43-3) is fixedly arranged on the inner arc surface of the second main body portion (43-2), and the shape and size of the second flexible pad (43-3) are both adapted to the second main body portion (43-2); The first convex portion (42-1) of the first guard plate (42) is arranged in the first gap (41-5), and the first pin shaft (44) sequentially passes through the first through hole (41-3-1), the fifth through hole (42-4), and the second through hole (41-4-1), so that the first guard plate (42) is hinged to one end of the arc-shaped member (41); the second convex portion (43-1) of the second guard plate (43) is arranged in the second gap (41-8), and the second pin shaft (45) sequentially passes through the third through hole (41-6-1), the sixth through hole (43-4), and the fourth through hole (41-7-1), so that the second guard plate (43) is hinged to the other end of the arc-shaped member (41).

3. The medical head fixation device according to claim 2, characterized in that, The skull fixing device further includes a cross beam (10) and an adjusting assembly (50); The cross beam (10) includes a cylindrical cross bar (11), and a first threaded hole (12) penetrating the cross bar (11) is arranged near one end of the cross bar (11); The adjusting assembly (50) includes a fourth bolt knob (51), a first nut (52), and a second nut (53); the screw part of the fourth bolt knob (51) penetrates into the first threaded hole (12) of the cross beam (10), and the external thread of the screw part of the fourth bolt knob (51) can mesh with the internal thread of the first threaded hole (12); the lower end of the screw part of the fourth bolt knob (51) passing through the first threaded hole (12) sequentially penetrates into the first nut (52), the fifth threaded hole (41-2) of the arc-shaped member (41), and the second nut (53), and the external thread of the screw part of the fourth bolt knob (51) can mesh with the internal threads of the first nut (52), the fifth threaded hole (41-2) of the arc-shaped member (41), and the second nut (53), so that the lower end of the screw part of the fourth bolt knob (51) is fixedly connected to the arc-shaped member (41), and the extending direction of the straight plate part (41-1) of the arc-shaped member (41) is perpendicular to the extending direction of the cross bar (11) of the cross beam (10); By means of the threaded connection between the screw part of the fourth bolt knob (51) and the first threaded hole (12), by rotating the fourth bolt knob (51), the fourth bolt knob (51) can move downward or upward relative to the cross bar (11), thereby driving the fastening assembly (40) to move downward or upward.

4. The medical head fixation device according to claim 3, characterized in that, The skull fixing device further includes a support assembly (20) and a connection assembly (30); The support assembly (20) includes a column (21), a connecting rod (23), a U-shaped member (24), and a third bolt knob (25); the column (21) is cylindrical; the lower end of the column (21) is fixedly connected to one end of the connecting rod (23), and the column (21) and the connecting rod (23) are fixedly connected into an L-shaped structure; the other end of the connecting rod (23) is fixedly connected to the outer surface of the closed end of the U-shaped member (24); The connection assembly (30) includes a first cylindrical member (31), a second cylindrical member (32), a first bolt knob (34), and a second bolt knob (35); the inside of the first cylindrical member (31) is hollow and is provided with a circular cylindrical first cavity (31-1), and a third threaded hole (31-2) is provided on one side wall of the first cylindrical member (31), and the third threaded hole (31-2) communicates with the first cavity (31-1); the inside of the second cylindrical member (32) is hollow and is provided with a circular cylindrical second cavity (32-1), and a fourth threaded hole (32-2) is provided on one side wall of the second cylindrical member (32), and the fourth threaded hole (32-2) communicates with the second cavity (32-1); the first cylindrical member (31) is fixedly connected to the second cylindrical member (32), and their central axes are perpendicular to each other, so that the two are integrally in a "cross" shape; The cross bar (11) of the cross beam (10) penetrates into the second cavity (32-1) of the second cylindrical member (32). The outer diameter of the cross bar (11) matches the inner diameter of the second cavity (32-1), and the cross bar (11) can slide relative to the second cylindrical member (32); the column (21) of the support assembly (20) penetrates into the first cavity (31-1) of the first cylindrical member (31). The outer diameter of the column (21) matches the inner diameter of the first cavity (31-1), and the column (21) can slide relative to the first cylindrical member (31); the cross bar (11) of the cross beam (10) is arranged horizontally, and the column (21) of the support assembly (20) is arranged vertically; The screw part of the first bolt knob (34) is arranged in the third threaded hole (31-2). The external thread of the screw part of the first bolt knob (34) meshes with the internal thread of the third threaded hole (31-2), and the inner end head of the screw part of the first bolt knob (34) abuts against the column (21), realizing the fixed connection between the column (21) and the first cylindrical member (31); the screw part of the second bolt knob (35) is arranged in the fourth threaded hole (32-2). The external thread of the screw part of the second bolt knob (35) meshes with the internal thread of the fourth threaded hole (32-2), and the inner end head of the screw part of the second bolt knob (35) abuts against the cross bar (11), realizing the fixed connection between the cross bar (11) and the second cylindrical member (32).

5. The medical head fixation device according to claim 4, characterized in that, The U-shaped member (24) includes an upper arm plate (24-1), a main body plate (24-2) and a lower arm plate (24-3), and the upper arm plate (24-1), the main body plate (24-2) and the lower arm plate (24-3) are fixedly connected in sequence to form a U-shaped structure; the open end of the U-shaped member (24) is arranged facing away from the connecting rod (23); a wedge part (24-5) is fixedly arranged at the open end of the U-shaped member (24); the wedge part (24-5) is fixedly arranged at the outer edge of the upper arm plate (24-1). The cross section of the wedge part (24-5) is triangular, and the wedge part (24-5) extends downward, so that the upper arm plate (24-1), the wedge part (24-5) and the main body plate (24-2) form an upward concave groove; a circular second threaded hole (24-4) is provided on the lower arm plate (24-3); the screw part of the third bolt knob (25) penetrates vertically upward into the second threaded hole (24-4), and the external thread of the screw part of the third bolt knob (25) meshes with the internal thread of the second threaded hole (24-4). By rotating the knob part of the third bolt knob (25), the third bolt knob (25) can move up and down vertically relative to the lower arm plate (24-3) of the U-shaped member (24).

6. The medical head fixation device according to claim 4, wherein, The support assembly (20) further includes a base (22). The lower end of the upright column (21) is fixedly connected to one end of the connecting rod (23) through the base (22). The base (22) is in the shape of a cuboid or a cube. The upper surface of the base (22) is fixedly connected to the lower end of the upright column (21), and one side surface of the base (22) is fixedly connected to one end of the connecting rod (23).

7. The medical head fixation device according to claim 4, wherein, The connecting rod (23) is in the shape of a cylinder. At the connection between the connecting rod (23) and the U-shaped member (24), a first reinforcing plate (23-1) and a second reinforcing plate (23-2) are fixedly provided. The first reinforcing plate (23-1) and the second reinforcing plate (23-2) have the same shape and are both in the shape of a right triangle. The first reinforcing plate (23-1) and the second reinforcing plate (23-2) are symmetrically arranged on the upper and lower sides of the connecting rod (23). One right-angled side of the first reinforcing plate (23-1) is fixedly connected to the side surface of the connecting rod (23), and the other right-angled side is fixedly connected to the outer surface of the closed end of the U-shaped member (24). One right-angled side of the second reinforcing plate (23-2) is fixedly connected to the side surface of the connecting rod (23), and the other right-angled side is fixedly connected to the outer surface of the closed end of the U-shaped member (24). The first reinforcing plate (23-1) and the second reinforcing plate (23-2) are used to improve the fixed connection strength between the connecting rod (23) and the U-shaped member (24).

8. The medical head fixation device according to claim 4, characterized in that, Scale marks are provided on both the cross bar (11) and the upright column (21). At the end of the cross bar (11) far from the first threaded hole (12), a first flange (13) surrounding the cross bar (11) for one week is provided. The first flange (13) can play a limiting role for the cross bar (11). At the upper end of the upright column (21), a detachable second flange (26) surrounding the upright column (21) for one week is provided. The second flange (26) can play a limiting role for the upright column (21).

9. The medical head fixation device according to claim 4, wherein, The outer shapes of the first cylindrical member (31) and the second cylindrical member (32) are both in the shape of a cuboid. Chamfers are provided at the edges of the first cylindrical member (31) and the second cylindrical member (32). The first cylindrical member (31) and the second cylindrical member (32) are fixedly connected through a connecting portion (33).

10. The medical head fixation device according to claim 2, characterized in that, One end of the first pin shaft (44) is fixedly provided with a third flange (48), and the other end is provided with an external thread. The first nut (46) is sleeved on the free end of the first pin shaft (44), and the internal thread of the first nut (46) meshes with the external thread of the free end of the first pin shaft (44). Both the third flange (48) and the first nut (46) play a limiting role to prevent the first pin shaft (44) from falling off. One end of the second pin shaft (45) is fixedly provided with a fourth flange (49), and the other end is provided with an external thread. The second nut (47) is sleeved on the free end of the second pin shaft (45), and the internal thread of the second nut (47) meshes with the external thread of the free end of the second pin shaft (45). Both the fourth flange (49) and the second nut (47) play a limiting role to prevent the second pin shaft (45) from falling off.

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