Adjustable skull lock capable of preventing skull from sinking

Abstract

The invention relates to the technical field of skull locks, in particular to an adjustable skull lock capable of avoiding skull sinking, which comprises a connecting piece, and a fixing component for fixing the skull is arranged at the upper end of the connecting piece; a mounting groove is formed in the lower end of the connecting piece, a pull wire is fixedly connected to one side of the mounting groove, and a limiting assembly used for fixing the pull wire is arranged on one side of the upper end of the connecting piece; the limiting assembly comprises a base, the base is fixedly installed on one side of the upper end of the connecting piece, the arc-shaped structure of the longitudinal clamping plate and the design of an anti-skid groove increase the contact area and friction force with a pull wire, and even and stable clamping force can be formed in the longitudinal direction in cooperation with elastic reset force of a reset spring; the second transverse clamping plate is in linkage with the extrusion shaft through a curved inclined limiting groove, complementary extrusion force is applied in the transverse direction, it is guaranteed that the traction line is firmly locked in multiple dimensions through the combined action of the longitudinal clamping face and the transverse clamping face, and the displacement trend generated by the size change of the skull is effectively resisted.

Description

Technical Field

[0001] The invention relates to the technical field of skull locks, in particular to an adjustable skull lock capable of preventing the skull from sinking. Background Art

[0002] During brain surgery, after skull removal for lesion treatment, the skull needs to be repositioned and fixed to maintain intracranial structural stability. Traditional skull fixation procedures typically rely on a skull lock device: a connecting plate is first placed in the surgical area. The connecting plate is then fixed to the patient's skull and the repositioned skull surface using a first and second screw on either side, forming a basic mechanical connection point.

[0003] However, the existing skull lock device has exposed significant deficiencies in long-term use. Since the skull tissue may gradually reduce in volume due to factors such as calcium loss and abnormal bone metabolism during the postoperative healing process, the fixed structure of the traditional skull lock often lacks dynamic adjustment capabilities. It is unable to adaptively adjust the fixation tension according to subtle changes in the skull, resulting in a gradual decrease in the fit between the connecting piece and the skull. When the skull volume shrinks, the mechanical stress distribution between the fixed points is unbalanced, and the skull may sink into the skull due to lack of uniform support, squeezing the brain tissue and causing symptoms of nerve compression. Once brain tissue is squeezed, a secondary surgical intervention is often required, which not only brings additional risks to the patient, but may also cause tissue damage due to repeated adjustments. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides an adjustable skull lock which can prevent the skull from sinking.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an adjustable skull lock capable of preventing the skull from sinking, comprising a connecting piece, the upper end of which is provided with a fixing assembly for fixing the skull; The lower end of the connecting piece is provided with a mounting groove, one side of the mounting groove is fixedly connected to a traction line, and one side of the upper end of the connecting piece is provided with a limiting component for fixing the traction line; The top end face of said sliding arm is fixedly provided with a toothed connecting strip which is cooperatively connected with said toothed connecting strip.

[0006] Specifically, the fixing assembly includes a first screw and a second screw, the first screw is inserted on one side of the connecting piece, and the second screw is inserted on the other side of the connecting piece.

[0007] Specifically, the upper end of the base is designed as a C-shaped structure, the corners of the base are smoothly transitioned, and the base is made of medical titanium alloy.

[0008] Specifically, the longitudinal clamping plate is designed as an arc-shaped structure, a first wire clamping groove is opened on one side of the longitudinal clamping plate, and an anti-slip groove is opened on one side of the first wire clamping groove.

[0009] Specifically, one side of the second transverse clamping plate is designed as a concave structure, and the first transverse clamping plate and the second transverse clamping plate are both provided with a second wire clamping groove on opposite sides.

[0010] Specifically, the limiting groove is opened in a curved and inclined shape, and the inner wall of the limiting groove is provided with a wear-resistant layer.

[0011] Specifically, the traction line is made of peek material.

[0012] Beneficial effects of the present invention: (1) The present invention adopts a bidirectional extrusion mechanism of the longitudinal splint and the transverse splint: the arc-shaped structure and anti-slip groove design of the longitudinal splint increase the contact area and friction with the traction line, and cooperate with the elastic reset force of the reset spring to form a uniform and stable clamping force in the longitudinal direction; the second transverse splint is linked to the extrusion shaft through a curved and inclined limit groove, applying a complementary extrusion force in the transverse direction. The longitudinal and transverse bidirectional clamping surfaces work together to ensure that the traction line is firmly locked in multiple dimensions, effectively resisting the displacement trend of the skull caused by volume changes.

[0013] (2) When using the present invention, the traction wire can be quickly released or locked by simply applying external force to press the extrusion shaft, without the need for additional tools, which greatly shortens the fixation operation time. The reserved traction wire joint space facilitates fine-tuning of the tension according to the healing status of the skull after surgery, avoiding the irreversible defects caused by one-time fixation of traditional devices and providing adaptability for long-term fixation after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] Figure 1 The main view of the structure provided by the present invention; Figure 2 A side view of the structure provided by the present invention; Figure 3 A front view of the limiting structure provided by the present invention; Figure 4 A diagram showing the first state of the limiting structure provided by the present invention; Figure 5 A diagram showing the second state of the limiting structure provided by the present invention; Figure 6 A cross-sectional view of the local structure of the base provided by the present invention; Figure 7 A schematic diagram of the structure of the second horizontal splint provided by the present invention; Figure 8 This is a schematic diagram of the longitudinal splint structure provided by the present invention.

[0016] In the figure: 1. Connecting plate; 2. Mounting groove; 3. Pull line; 4. Base; 5. Through groove; 6. Return spring; 7. Longitudinal splint; 8. Round shaft; 9. Extrusion shaft; 10. Extrusion groove; 11. Limit block; 12. Through hole; 13. First transverse splint; 14. Guide rod; 15. Second transverse splint; 16. Limit groove; 17. First screw; 18. Second screw. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] like Figures 1-8 As shown, the present invention provides the following technical solutions: Example 1: An adjustable skull lock capable of preventing skull subsidence, comprising a connecting piece 1, the upper end of which is provided with a fixing assembly for fixing the skull; The fixing assembly includes a first screw 17 and a second screw 18 . The first screw 17 is inserted on one side of the connecting piece 1 , and the second screw 18 is inserted on the other side of the connecting piece 1 .

[0019] When in use, the connecting piece 1 is placed at the surgical site of the patient, and is connected to the patient's skull via the first screw 17 , while the connecting piece 1 is connected to the repositioned skull via the second screw 18 .

[0020] Embodiment 2: This embodiment differs from the embodiment 1 in that the technical solution includes: a mounting groove 2 is provided at the lower end of the connecting piece 1, a traction line 3 is fixedly connected to one side of the mounting groove 2, and a limiting component for fixing the traction line 3 is provided at one side of the upper end of the connecting piece 1; The limiting assembly includes a base 4, which is fixedly mounted on one side of the upper end of the connecting piece 1. The base 4 is provided with two symmetrically arranged through grooves 5. The inner walls of the two through grooves 5 are respectively fixedly connected with reset springs 6. The other ends of the reset springs 6 are respectively fixedly connected with longitudinal splints 7. The longitudinal splints 7 are slidably connected to the through grooves 5. One side of the upper end of the longitudinal splints 7 is fixedly connected with a round shaft 8. The upper end of the round shaft 8 is provided with an extrusion shaft 9. The extrusion shaft 9 is provided with an extrusion groove 10. The extrusion shaft 9 is sleeved on the round shaft 8 through the extrusion groove 10. The round shaft 8 Slidingly connected to the extrusion groove 10, the upper ends of the circular shafts 8 are fixedly connected to the limiting blocks 11, a through hole 12 is opened on one side of the base 4, and the base 4 is fixedly connected to the first transverse splint 13 corresponding to the through hole 12. The first transverse splint 13 is vertically slidably connected to two guide rods 14, and the lower ends of the two guide rods 14 are commonly fixedly connected to the second transverse splint 15. The upper end of the second transverse splint 15 is provided with a limiting groove 16. The second transverse splint 15 is sleeved on the outer wall of the extrusion shaft 9 through the limiting groove 16, and the extrusion shaft 9 is slidably connected to the limiting groove 16; The base 4 has a C-shaped structure design at the upper end, and the corners of the base 4 have smooth transitions. The base 4 is made of medical titanium alloy, and the longitudinal splint 7 has an arc-shaped structure design. A first wire clamping groove is provided on one side of the longitudinal splint 7, and an anti-slip groove is provided on one side of the first wire clamping groove. One side of the second transverse splint 15 is designed as a concave structure, and a second wire clamping groove is provided on the opposite side of the first transverse splint 13 and the second transverse splint 15. The limiting groove 16 is opened in a curved shape, and the inner wall of the limiting groove 16 is provided with a wear-resistant layer. The traction line 3 is made of peek material.

[0021] When in use, the patient's skull is connected by the first screw 17, the second screw 18 and the connecting piece 1. During the connection process, the base 4 with a C-shaped structure can avoid motion interference with the first screw 17, so that the first screw 17 is smoothly connected to the patient's skull. After the connection is completed, the traction line 3 is passed through the gap between the skull and the patient's skull, and the traction line 3 is passed through the skull to be installed. After passing through, the extrusion shaft 9 is squeezed, and the squeezed extrusion shaft 9 squeezes the circular shaft 8 through the extrusion groove 10. The squeezed circular shaft 8 then drives the longitudinal splints 7 to move away from each other, and the longitudinal splints 7 that move away from each other then squeeze the reset spring 6. At the same time, the extrusion shaft 9 squeezes the limiting groove 16, and the squeezed second horizontal splint 15 moves downward. At this time, the traction line 3 is opened from the base 4. The through hole 12 is designed to lead out. After leading out, the extrusion shaft 9 is stopped from being squeezed. The reset spring 6 that loses the extrusion force drives the two longitudinal splints 7 to reset. The reset longitudinal splint 7 then squeezes the longitudinal contact surface of the traction line 3. At the same time, the reset longitudinal splint 7 drives the extrusion shaft 9 to reset through the circular shaft 8. The reset extrusion shaft 9 then squeezes the limit groove 16. The squeezed second transverse splint 15 then moves upward along the first transverse splint 13. The moving second transverse splint 15 then squeezes the traction line 3 toward the first transverse splint 13. At this time, the traction line 3 is squeezed by the transverse contact surface. The squeezing of the two contact surfaces effectively locks the traction line 3, and a larger traction line 3 joint is left between the two contact surfaces to facilitate subsequent traction and adjustment. The excess part of the traction line 3 can be sheared.

[0022] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable skull lock capable of preventing skull from sinking, comprising a connecting piece (1), wherein the upper end of the connecting piece (1) is provided with a fixing assembly for fixing the skull; Its characteristics are: A mounting groove (2) is provided at the lower end of the connecting piece (1), a traction line (3) is fixedly connected to one side of the mounting groove (2), and a limiting component for fixing the traction line (3) is provided at one side of the upper end of the connecting piece (1); The limit assembly includes a base (4), the base (4) is fixedly mounted on one side of the upper end of the connecting piece (1), the base (4) is provided with two symmetrically arranged through grooves (5), the inner walls of the two through grooves (5) are respectively fixedly connected with return springs (6), the other ends of the return springs (6) are respectively fixedly connected with longitudinal clamps (7), the longitudinal clamps (7) are slidably connected to the through grooves (5), the upper ends of the longitudinal clamps (7) are fixedly connected with a circular shaft (8), the upper end of the circular shaft (8) is provided with an extrusion shaft (9), the extrusion shaft (9) is provided with an extrusion groove (10), the extrusion shaft (9) is sleeved on the circular shaft (8) through the extrusion groove (10), the circular shaft (8) is provided with an extrusion shaft (9), and the circular shaft (8) is provided with an extrusion shaft (9). The shaft (8) is slidably connected to the extrusion groove (10), the upper end of the circular shaft (8) is fixedly connected to the limiting block (11), a through hole (12) is provided on one side of the base (4), and the base (4) is fixedly connected to a first transverse clamping plate (13) corresponding to the through hole (12), the first transverse clamping plate (13) is vertically slidably connected to two guide rods (14), the lower ends of the two guide rods (14) are commonly fixedly connected to a second transverse clamping plate (15), the upper end of the second transverse clamping plate (15) is provided with a limiting groove (16), the second transverse clamping plate (15) is sleeved on the outer wall of the extrusion shaft (9) through the limiting groove (16), and the extrusion shaft (9) is slidably connected to the limiting groove (16).

2. The adjustable skull lock for preventing skull collapse according to claim 1, characterized in that: The fixing assembly comprises a first screw (17) and a second screw (18), wherein the first screw (17) is inserted on one side of the connecting piece (1), and the second screw (18) is inserted on the other side of the connecting piece (1).

3. The adjustable skull lock for preventing skull collapse according to claim 1, characterized in that: The base (4) has a C-shaped structure at the upper end, and the corners of the base (4) are smoothly transitioned. The base (4) is made of medical titanium alloy.

4. The adjustable skull lock capable of preventing skull collapse according to claim 1, characterized in that: The longitudinal clamping plate (7) is designed as an arc-shaped structure, and a first wire clamping groove is provided on one side of the longitudinal clamping plate (7), and an anti-slip groove is provided on one side of the first wire clamping groove.

5. The adjustable skull lock capable of preventing skull collapse according to claim 1, characterized in that: One side of the second transverse clamping plate (15) is designed as a concave structure, and a second wire clamping groove is provided on the opposite side of the first transverse clamping plate (13) and the second transverse clamping plate (15).

6. The adjustable skull lock capable of preventing skull collapse according to claim 1, characterized in that: The limiting groove (16) is opened in a curved and inclined manner, and the inner wall of the limiting groove (16) is provided with a wear-resistant layer.

7. The adjustable skull lock capable of preventing skull collapse according to claim 1, characterized in that: The traction line (3) is made of peek material.

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