Anti-skidding structure for forehead blocking head clamp

Abstract

The invention discloses an anti-skid structure for a forehead gear head clamp. The anti-skid structure comprises an anti-skid mechanism, a supporting seat and a mounting seat. Anti-skid mechanisms are mounted in two mounting holes of the supporting seat, a forehead blocking pad is arranged at the top of the anti-skid mechanisms, and swing head clamps are arranged on two sides of the anti-skid mechanisms; and two carbon fiber rods are symmetrically fixed on the mounting seat, and the carbon fiber rods are arranged in the anti-skid mechanism in a sleeving manner. The anti-skid mechanism comprises an anti-skid sleeve with an oval sliding hole and a spring plunger with a ball. When no downward pressing exists, the carbon fiber rod smoothly slides in the long axis direction of the sliding hole, the balls roll to reduce friction, and labor-saving adjustment is achieved. When the forehead presses downwards, pressure is transmitted to the supporting seat through the forehead blocking pad, the upper wall of the oval sliding hole is forced to elastically deform and lock the carbon fiber rod, interference fit self-locking is formed, and backward sliding is effectively prevented. The device is ingenious in structure, and has the functions of adjusting smoothness and passive safety locking during use.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, specifically to an anti-slip structure for a forehead clip. Background Technology

[0002] In medical imaging and radiotherapy, high-precision positioning and stable support of the patient's head are required.

[0003] During the adjustment and use of the head fixation device, the operation of sliding the support base along the guide rail and finally locking it will affect the repeatability of the positioning reference and the safety of operation.

[0004] Currently, one method of forehead clamp anti-slip involves placing a circular metal or plastic sleeve inside the mounting hole of the support base to encase a carbon fiber rod, achieving sliding through clearance and relying on an external locking mechanism for fixation. However, in this existing method, even with external locking force, the support base can still experience uncontrollable backward sliding under pressure from the forehead or vibrations from the equipment. This backward sliding causes a shift in the positioning reference, affecting the accuracy and reliability of medical procedures. Furthermore, some current anti-slip methods struggle to simultaneously achieve low-resistance sliding adjustment and instantaneous self-locking, and their complex structures and cumbersome assembly result in positioning delays, unstable locking, and increased contact wear after prolonged use. Summary of the Invention

[0005] The purpose of this invention is to provide a subject matter that addresses the problems raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: According to one aspect of the present invention, an anti-slip structure for a forehead guard clamp is characterized in that it includes an anti-slip mechanism, a support base, and a mounting base; the support base has two symmetrical mounting holes on its front side, and an anti-slip mechanism is fixedly installed in each of the two mounting holes; a forehead guard pad is provided on the top of the support base, and swing head clamps are provided on both sides of the support base; two carbon fiber rods are symmetrically fixed on the front side of the mounting base, and the carbon fiber rods are respectively sleeved in the corresponding anti-slip mechanism. According to at least one embodiment of the present invention, an anti-slip structure for a forehead clip includes an anti-slip sleeve, which is fixedly installed in a mounting hole of a support base. A sliding hole is provided inside the anti-slip sleeve, and the sliding hole cooperates with a carbon fiber rod. According to at least one embodiment of the present invention, the anti-slip structure for a forehead clip has an elliptical sliding hole with different dimensions for its major and minor axes, which is used to restrict the rotational movement of the carbon fiber rod and increase the contact area. According to at least one embodiment of the present invention, an anti-slip structure for a forehead guard clip is provided, wherein fixing blocks are symmetrically fixedly installed on both sides of the top periphery of the anti-slip sleeve, and each fixing block has an internal threaded hole, and the internal threaded hole is connected to the sliding hole. According to at least one embodiment of the present invention, the anti-slip structure for a forehead clip further includes a spring plunger with a ball bearing at its bottom, the ball bearing being made of a rigid material for contacting a carbon fiber rod.

[0007] According to at least one embodiment of the present invention, an anti-slip structure for a forehead clamp is provided, wherein the outer periphery of the spring plunger is provided with an external thread, and the external thread of the spring plunger mates with an internal threaded hole; the bottom of the spring plunger extends into a sliding hole, and the ball abuts against a carbon fiber rod. According to at least one embodiment of the present invention, an anti-slip structure for a head stop clamp is provided with an internal hexagonal groove on the top of the spring plunger. The internal hexagonal groove is a hexagonal groove used to cooperate with an internal hexagonal wrench to achieve rotational operation. According to at least one embodiment of the present invention, the anti-slip structure for a forehead guard clip includes a forehead guard pad that is a flexible contact element, which is fixed to the top of the support base by adhesive or snap-fit, for contacting the user's forehead and transmitting downward pressure. According to at least one embodiment of the present invention, an anti-slip structure for a forehead guard clamp is provided, wherein the swinging head clamp is connected to both sides of a support base via a hinge structure and can swing within a preset angle range to assist in fixing the head. According to at least one embodiment of the present invention, the anti-slip structure for a forehead clip includes a carbon fiber rod that is mounted on the front of the mounting base by bolts, adhesive, or embedded fixing, serving as a sliding guide rail for the support base.

[0008] Compared with the prior art, the beneficial effects of the present invention are: Under no downward pressure or slight adjustment force, the carbon fiber rod can slide freely within the elliptical sliding hole of the anti-slip sleeve. The long axis of the sliding hole provides sufficient clearance, allowing relative movement between the carbon fiber rod and the inner wall of the sliding hole, enabling smooth adjustment of the support seat's position. When the support seat is pulled back and forth, the ball bearings roll on the surface of the carbon fiber rod, greatly reducing sliding friction resistance and making adjustment smoother and less effortful. Through these features, the device can achieve smooth, low-resistance sliding adjustment of the support seat along the carbon fiber rod to meet different position requirements. When the user presses down with their forehead, the force is transmitted to the support seat through the forehead pad. The carbon fiber rod comes into strong contact and compression with the elliptical constraint surface at the top of the sliding hole. This compression causes elastic deformation of the hole wall in the upper region of the elliptical hole. The deformed hole wall tightly grips the carbon fiber rod, forming a significant interference fit. This self-locking effect of hole wall deformation caused by downward pressure, through these features, allows the device to automatically trigger locking using the elliptical sliding hole and spring plunger when the user presses down with their forehead, effectively preventing the support seat from sliding backward and providing reliable passive safety. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of the anti-slip mechanism installed on the support base in an embodiment of the anti-slip structure for forehead guard clip of the present invention; Figure 2 This is a schematic diagram of the overall structure of the anti-slip structure of the forehead clip of the present invention in use. Figure 3 This is a schematic diagram of the overall structure of the anti-slip mechanism in an embodiment of the anti-slip structure for forehead guard clips of the present invention; Figure 4 This is a schematic diagram of the overall structure of the anti-slip mechanism in an embodiment of the anti-slip structure for forehead clips of the present invention, in a disassembled state.

[0010] Figure label: 1. Anti-slip mechanism 11. Anti-slip sleeve 12. Sliding hole 13. Fixing block 14. Internal threaded hole 15. Spring plunger 16. Ball bearing 2. Support base 21. Forehead pad 22. Swinging head clamp 3. Mounting bracket 31. Carbon fiber rod Detailed Implementation The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0011] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments.

[0012] It is understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0013] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0014] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as exemplary features of various details providing ways in which the technical concepts of this disclosure can be implemented in practice.

[0015] When a component is referred to as being on or above another component, connected to or combined with another component, the component may be directly on, directly connected to or directly combined with the other component, or there may be an intermediate component.

[0016] According to one embodiment of this application, an anti-slip structure for a forehead protector is provided. The anti-slip structure may include an anti-slip mechanism 1, a support base 2, and a mounting base 3.

[0017] The support base 2 has two symmetrical mounting holes on its front side, and an anti-slip mechanism 1 is fixedly installed in each of the two mounting holes. A front stop pad 21 is provided on the top of the support base 2, and swing head clamps 22 are provided on both sides of the support base 2. Two carbon fiber rods 31 are symmetrically fixed on the front side of the mounting base 3, and the carbon fiber rods 31 are respectively sleeved in the corresponding anti-slip mechanism 1.

[0018] The anti-slip mechanism 1 is a mechanical component embedded in the mounting hole of the support base 2, used to realize the dual functions of guiding the sliding of the carbon fiber rod 31 and pressing and locking. The anti-slip mechanism 1 can be an integral or split structure. For example, it can be composed of the anti-slip sleeve 11 alone, or it can be further integrated with components such as spring plunger 15 and ball bearing 16. The anti-slip mechanism 1 and the support base 2 are fixed by interference fit, threaded connection, snap-fit ​​structure or adhesive method. Its axial position ensures that the center line of the sliding hole 12 is basically coincident with the axis of the carbon fiber rod 31 to ensure sliding coaxiality and uniform force.

[0019] Carbon fiber rods 31 are respectively fitted into the corresponding anti-slip mechanisms 1, that is, each carbon fiber rod 31 passes through a sliding hole 12 of an anti-slip mechanism 1, forming a rod-through sliding pair. The anti-slip mechanism 1 can slide axially relative to the carbon fiber rods 31, but is restricted by the shape of the sliding hole 12 to suppress circumferential rotation, thereby ensuring the stability of the support seat 2.

[0020] According to at least one embodiment of the anti-slip structure of this application, the anti-slip mechanism 1 includes an anti-slip sleeve 11, which is fixedly installed in the mounting hole of the support base 2. The anti-slip sleeve 11 has a sliding hole 12 inside, which cooperates with the carbon fiber rod 31.

[0021] The anti-slip sleeve 11 is a hollow cylindrical structural component whose outer contour is adapted to the inner wall shape of the mounting hole of the support base 2, and is used to be embedded and fixed in the mounting hole of the support base 2.

[0022] The anti-slip sleeve 11 is fixed to the mounting hole of the support base 2 by means of interference fit, adhesive connection or screw fastening, etc., and the embodiments of this application do not make special limitations in this regard.

[0023] The sliding hole 12 is an axially penetrating inner cavity channel of the anti-slip sleeve 11, and its cross-sectional shape forms a clearance fit with the outer contour of the carbon fiber rod 31.

[0024] The dimensions of the sliding hole 12 are set according to the actual diameter of the carbon fiber rod 31 and the required sliding resistance. For example, when the diameter of the carbon fiber rod 31 is Φ8mm, the minor axis dimension of the sliding hole 12 is set to Φ8.1–Φ8.3mm, and the major axis dimension is set to Φ9.0–Φ10.5mm, so as to balance the smoothness of sliding and the stability of constraint.

[0025] The axial length of the sliding hole 12 is set according to the thickness of the support 2 and the structural strength requirements of the anti-slip sleeve 11, for example, 12–20 mm. This application embodiment does not make any special limitation on this.

[0026] The sliding hole 12 and the carbon fiber rod 31 are matched in that the carbon fiber rod 31 passes through the sliding hole 12 and the two are in a non-rigid contact state. When there is no downward pressure, they are allowed to slide relative to each other along the axial direction, while restricting the circumferential rotation of the carbon fiber rod 31 relative to the anti-slip sleeve 11.

[0027] The inner wall of the sliding hole 12 is a smooth machined surface or has a micro-textured structure; however, this application embodiment does not impose any special limitations on this.

[0028] According to at least one embodiment of the anti-slip structure of this application, the sliding hole 12 is elliptical, and its cross-sectional major axis and minor axis have different dimensions, which is used to restrict the rotational movement of the carbon fiber rod 31 and increase the contact area.

[0029] The sliding hole 12 is elliptical, referring to a through hole with a standard elliptical cross-section that is axially opened inside the anti-slip sleeve 11. The major axis of the ellipse is aligned with the axial sliding direction of the carbon fiber rod 31, and the minor axis is perpendicular to the sliding direction. The major axis of the elliptical cross-section is larger than the outer diameter of the carbon fiber rod 31, and the minor axis is slightly smaller than or equal to the outer diameter of the carbon fiber rod 31. The specific values ​​are set according to the actual diameter of the carbon fiber rod 31, the elastic modulus of the material used in the anti-slip sleeve 11, and the expected locking stiffness. For example, when the outer diameter of the carbon fiber rod 31 is 8mm, the major axis of the sliding hole 12 is set to 8.3–8.6mm, and the minor axis is set to 7.8–7.95mm. This application embodiment does not impose any special limitations on this.

[0030] The cross-sectional dimensions of the sliding hole 12 are different for its major axis and minor axis, which is a geometric feature that the anti-slip sleeve 11 is directly formed during the manufacturing process through precision CNC boring, wire cutting or injection molding. The dimensional difference allows the sliding hole 12 to retain an adjustment clearance in the long axis direction, ensuring the smooth sliding of the support 2 along the carbon fiber rod 31. In the short axis direction, it forms a constraint boundary on the circumferential rotation of the carbon fiber rod 31, preventing it from rotating during sliding and thus improving the overall spatial positioning stability of the front stop clamp. This constraint effect does not rely on additional limiting structures but is achieved solely by the non-circular cross-sectional geometry of the sliding hole 12 itself. The sliding hole 12 restricts the rotational movement of the carbon fiber rod 31 and increases the contact area. When the carbon fiber rod 31 is embedded in the elliptical sliding hole 12, its cylindrical surface is limited by two or more points of contact with the elliptical hole wall in the short axis direction, suppressing free rotation around its own axis. Simultaneously, compared to a circular sliding hole that only has line contact at a certain generatrix, the elliptical sliding hole 12, under compressive deformation, forms a larger surface contact area with the surface of the carbon fiber rod 31, effectively increasing the actual contact area. This increased contact area can disperse local stress when the front stop clamp is pressed down to trigger self-locking, reducing the risk of surface damage to the carbon fiber rod 31 and improving the efficiency of static friction generation. The elliptical shape of the sliding hole 12 can also be replaced with other non-circular symmetrical cross sections, such as racetrack shape, D-shape, or near-elliptical profile with flattening, as long as it has dimensional redundancy in one direction to support sliding and dimensional constraints in the orthogonal direction to suppress rotation and enhance contact. In this application embodiment, no special limitation is made on the specific ellipticity (i.e., the ratio of the major axis to the minor axis, the material type, and the heat treatment state) of the sliding hole 12.

[0031] According to at least one embodiment of the anti-slip structure of this application, fixing blocks 13 are symmetrically fixedly installed on both sides of the top periphery of the anti-slip sleeve 11. Each fixing block 13 has an internal threaded hole 14, which communicates with the sliding hole 12. The fixing block 13 is a protruding structure symmetrically positioned on the left and right sides of the top outer periphery of the anti-slip sleeve 11, integrally formed with the anti-slip sleeve 11. Alternatively, the fixing block 13 can be an independent component fixedly connected to the top periphery of the anti-slip sleeve 11 by welding, screwing, or adhesive bonding. The fixing block 13 is rectangular in shape. The cylindrical or trapezoidal platform has a height of 3mm to 8mm and a width of 5mm to 12mm. The internal threaded hole 14 is a through hole that penetrates the thickness direction of the fixed block 13. Its axis is obliquely arranged with the central axis of the sliding hole 12, and the oblique angle is 15° to 45°. The internal threaded hole 14 is connected to the sliding hole 12, meaning that the bottom opening of the internal threaded hole 14 extends directly to the inner wall of the sliding hole 12, forming a physical through channel. This connection method is a straight-through opening or an oblique through hole with a transition chamfer or a tapered guide section. The connection position is located in the upper half of the sliding hole 12.

[0032] According to at least one embodiment of the anti-slip structure of this application, the anti-slip mechanism 1 further includes a spring plunger 15, the bottom of which is provided with a ball bearing 16. The ball bearing 16 is made of a hard material and is used to form contact with the carbon fiber rod 31. The spring plunger 15 is an adjustable fastening element with a built-in compression helical spring. Its periphery is provided with external threads for screwing into the internal threaded hole 14 on the fixing block 13. The axial length, outer diameter and thread specification of the spring plunger 15 can be set according to the actual assembly space and preload requirements. The ball bearing 16 and the bottom of the spring plunger 15 are engaged by embedded locking, elastic clamping or step limiting to ensure that they do not fall off or deflect during the extension and contraction of the spring.

[0033] The ball bearing 16 is used to form contact with the carbon fiber rod 31. During the sliding adjustment of the support seat 2 along the carbon fiber rod 31, the ball bearing 16 normally protrudes from the inner wall of the sliding hole 12 under the elastic force of the helical spring inside the spring plunger 15, and forms a single point or near-single point elastic contact with the outer circular surface of the carbon fiber rod 31. This contact state causes the ball bearing 16 to roll along the surface of the carbon fiber rod 31 instead of sliding when the support seat 2 moves back and forth, thereby converting the original sliding friction into rolling friction.

[0034] According to at least one embodiment of the anti-slip structure of this application, the outer periphery of the spring plunger 15 is provided with external threads, and the external threads of the spring plunger 15 mate with the internal threaded hole 14; the bottom of the spring plunger 15 extends into the sliding hole 12, and the ball 16 abuts against the carbon fiber rod 31. The outer periphery of the spring plunger 15 is provided with external threads, and the single-start or multi-start triangular threads, trapezoidal threads, or rectangular threads distributed along the axial direction of the spring plunger 15 are set according to the actual assembly space, adjustment accuracy, and locking force requirements. The external thread and the internal threaded hole 14 inside the fixed block 13 form a detachable helical fit, so that the spring plunger 15 can achieve axial feed movement by rotation, thereby precisely controlling its insertion depth in the sliding hole 12. The external thread of the spring plunger 15 and the internal threaded hole 14 are fitted with a clearance fit or transition fit to take into account both the smoothness of screwing in and the stability of positioning. The depth of the internal threaded hole 14 is greater than the effective engagement length of the external thread of the spring plunger 15 to ensure that the thread is always in an effective meshing state during the screwing process and to avoid disengagement.

[0035] The axis of the internal threaded hole 14 is obliquely connected to the axis of the sliding hole 12, with an included angle ranging from 15° to 45°, so that the ball 16 can reliably abut against the surface of the carbon fiber rod 31 under spring preload, and at the same time provide a reasonable lever arm for the bottom plane of the plunger to apply normal clamping force to the carbon fiber rod 31.

[0036] The bottom of the spring plunger 15 extends into the sliding hole 12. The axial projection of the spring plunger 15 completely covers the radial cross-sectional area of ​​the sliding hole 12. Its bottom end face is located in the inner cavity of the sliding hole 12 and is arranged coaxially or approximately coaxially with the central axis of the sliding hole 12. The extension length of the spring plunger 15 is determined by a combination of the stroke of the ball 16, the diameter of the carbon fiber rod 31, and the wall thickness of the anti-slip sleeve 11. For example, when the diameter of the carbon fiber rod 31 is 8mm, the minimum distance from the bottom of the spring plunger 15 to the inner wall of the sliding hole 12 is 0.3mm to 1.2mm. This distance is checked based on the elastic modulus of the material and the expected clamping force. The main body of the spring plunger 15 is made of metal.

[0037] The ball bearing 16 abuts against the carbon fiber rod 31. Under the preload of the helical spring built into the spring plunger 15, the ball bearing 16 normally protrudes from the bottom end face of the spring plunger 15 and forms point contact or micro-surface contact with the surface of the carbon fiber rod 31. When the spring plunger 15 is screwed into the limit position, the ball bearing 16 is completely pressed back into the plunger cavity. At this time, the bottom end plane of the spring plunger 15 applies a uniformly distributed static pressure to the carbon fiber rod 31. The direction of this pressure is perpendicular to the axis of the carbon fiber rod 31, forming an auxiliary locking interface.

[0038] According to at least one embodiment of the anti-slip structure of this application, the top of the spring plunger 15 is provided with an internal hexagonal groove 151. The internal hexagonal groove 151 is a hexagonal recess for cooperating with an internal hexagonal wrench to achieve rotational operation. The internal hexagonal groove 151 is a regular hexagonal countersunk hole structure opened at the center of the top end face of the spring plunger 15. Its geometry matches the head contour of a standard internal hexagonal wrench. The side length, depth, and chamfer dimensions of the hexagonal groove can be set according to the actual assembly torque requirements and the overall size of the spring plunger 15. The internal hexagonal groove 151 can be a through groove or a blind groove. When a blind groove is used, a certain thickness of solid material is retained at the bottom of the groove to ensure the structural strength of the top of the spring plunger 15. When a through groove is used, it is necessary to ensure that the bottom of the groove is flush with the spring. Sufficient spacing is provided between the spring mounting cavities inside the plunger 15 to avoid interference with the spring compression stroke. The internal hexagonal groove 151 is machined by milling, electrical discharge machining, or precision stamping. The specific process can be determined according to the material requirements of the spring plunger 15. The internal hexagonal groove 151 is coaxial with the external thread axis of the spring plunger 15 to ensure uniform force during torque transmission and prevent thread seizure or ball 16 offset due to uneven load. The error of the coincidence between its symmetrical center line and the center axis of the spring plunger 15 is controlled within ±0.05mm. The internal hexagonal groove 151 is used to cooperate with a standard internal hexagonal wrench to achieve rotation operation. The internal hexagonal wrench is an L-type, T-type, or straight-handle hand tool, and its specifications correspond to the dimensions of the internal hexagonal groove 151.

[0039] In use, medical staff insert and rotate the internal hex wrench to drive the spring plunger 15 to screw in or out along the internal threaded hole 14 in the fixed block 13, thereby dynamically adjusting the preload of the ball 16 relative to the carbon fiber rod 31. When screwed in, the clamping force is increased, enhancing the initial sliding resistance and improving the locking response sensitivity. When screwed out, the clamping force is reduced, reducing sliding friction and improving the smoothness of adjustment. Compared with slotted, cross-shaped, or square slots, the hexagonal structure of the internal hexagonal groove 151 has higher torsional stiffness and better contact stability under the same cross-sectional dimensions, which can effectively prevent the wrench from slipping and ensure that the adjustment process is controllable and precise. This structure also facilitates the identification and positioning of automated assembly equipment, which is beneficial for subsequent production line upgrades.

[0040] According to at least one embodiment of the anti-slip structure of this application, the forehead pad 21 is a flexible contact element, which is fixed to the top of the support base 2 by adhesive or snap-fit, and is used to contact the user's forehead and transmit downward pressure.

[0041] The forehead protector 21 is made of silicone or medical-grade thermoplastic elastomer flexible material. Its outline is arc-shaped, ellipsoidal, or a biomimetic forehead surface to adapt to the anatomical shape of different individuals' foreheads. Its size and thickness are set according to the average head circumference of the patient group and clinical usage needs, with a thickness of 5mm–20mm or 3mm–25mm. When the forehead protector 21 is fixed by adhesive bonding, it uses medical pressure-sensitive adhesive, double-sided foam tape, or UV-cured acrylic adhesive to achieve a firm bond with the top surface of the support base 2. The bonding interface is a flat surface, a micro-textured surface, or a mating structure with positioning grooves / protrusions to enhance shear and peel resistance. When the forehead protector 21 is fixed by snap-fit, it features elastic locking feet, dovetail tenons, ring locking rings, or L-shaped hanging ears at its bottom. Correspondingly, the top of the support base 2 features matching slots, countersunk holes, limiting steps, or guide slopes to achieve tool-free quick assembly and disassembly. The forehead pad 21 is used to contact the user's forehead and transmit downward pressure. Its flexible material undergoes controllable elastic deformation when compressed, so that the contact pressure is more evenly distributed along the forehead surface, avoiding local stress concentration. This deformation process also has energy absorption characteristics, which can buffer the peak impact load when the patient suddenly leans forward or the equipment vibrates and causes instantaneous downward pressure, thereby reducing the dynamic impact intensity on the anti-slip sleeve 11 and carbon fiber rod 31 in the anti-slip mechanism.

[0042] According to at least one embodiment of the anti-slip structure of this application, the swing head clamp 22 is connected to both sides of the support base 2 by a hinge structure and can swing within a preset angle range to assist in fixing the head. The swing head clamp 22 is disposed on the left and right sides of the support base 2 and is used to fit and clamp the flexible or semi-rigid clamping parts on both sides of the patient's head (such as the temples or the area above the ears). The hinge structure is a rotary joint mechanism that connects the swing head clamp 22 and the side wall of the support base 2. It can be a pin hinge, a torsion spring hinge, or an embedded rotating shaft structure. The rotation axis of the hinge is parallel to the front and back direction of the support base 2 (i.e., perpendicular to the patient's forehead plane), so that the swing head clamp 22 can swing inward or outward around the axis within a preset angle range.

[0043] The hinge structure is connected to the support base 2 by embedded riveting, screw fastening or integral injection molding. When a split structure is adopted, the fixed end of the hinge is embedded in the installation groove reserved on the side wall of the support base 2 and locked by screws. When an integral structure is adopted, the support base 2 and the hinge base are injection molded by the same mold, and the hinge shaft and the swing head clamp 22 are assembled by snap-fit ​​or thread.

[0044] Both of the above implementation methods can ensure the structural stability and durability of the hinge structure during repeated oscillation.

[0045] The swing head clamp 22 can maintain its initial neutral position by relying on the elasticity of its own material or the torsion spring built into the hinge to provide a restoring torque without the action of external force. When the patient's head is placed in, the swing head clamps 22 on both sides swing inward synchronously under the lateral pressure of the head. The clamping force increases with the increase of the swing angle, forming an adaptive clamping within the preset angle range. After clamping is completed, the swing head clamp 22 maintains the clamping state under the action of the torsion spring or the elastic restoring force of the material, without the need for additional locking operation.

[0046] According to at least one embodiment of the anti-slip structure of this application, the carbon fiber rod 31 is installed on the front of the mounting base 3 by bolts, adhesive or embedded fixing, and serves as a sliding guide rail for the support base 2.

[0047] The carbon fiber rod 31 is a cylindrical solid carbon fiber reinforced polymer with a diameter of 8mm to 12mm and a length of 200mm to 400mm. The size, cross-sectional shape and surface treatment of the carbon fiber rod 31 are set according to the actual load-bearing requirements, installation space and fitting accuracy requirements with the anti-slip sleeve 11. This application embodiment does not impose any special limitations on these aspects.

[0048] The embedded fixing method is as follows: a through or blind hole-shaped embedding cavity is opened on the front of the mounting base 3, and the carbon fiber rod 31 is inserted into the cavity in whole or in part. Axial and radial dual constraints are achieved by interference fit, lateral pin locking or end limiting step. The embedding depth is set according to the ratio of carbon fiber rod 31 length to mounting base 3 thickness in a ratio of 1:3 to 1:5.

[0049] The carbon fiber rod 31 serves as a sliding guide for the support base 2. Its axis is parallel to the line connecting the center of the mounting hole of the support base 2, ensuring that the anti-slip sleeve 11 slides smoothly along the long axis in the sliding hole 12. At the same time, it ensures that when the elliptical sliding hole 12 is pressed down and locked, the upper curved surface of the elliptical sliding hole 12 forms a stable contact and controllable elastic deformation with the surface of the carbon fiber rod 31.

[0050] Through the above technical solution, this application achieves the following: when there is no downward pressure on the forehead or only a slight adjustment force is applied, the support seat 2 can slide freely along the carbon fiber rod 31 to quickly adjust its front and rear positions; when the patient applies downward pressure on their forehead, the force is transmitted to the support seat 2 through the forehead pad 21, which in turn drives the anti-slip mechanism 1 to move downward synchronously, triggering the non-circular fit constraint effect between the sliding hole 12 and the carbon fiber rod 31, causing the hole wall to undergo elastic deformation and form a local interference, thereby automatically increasing the static friction force and blocking the backward sliding tendency, achieving instantaneous passive locking without manual intervention. This structure significantly improves the positioning reliability and safety of use in emergency situations while ensuring adjustment flexibility.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A slip-resistant structure for a frontal head clamp, characterized by, The utility model provides an anti -skidding mechanism, support seat (2) and mounting seat (3) are included, the front symmetry of support seat (2) is equipped with two mounting hole, and two mounting hole all are fixedly installed with anti -skidding mechanism (1), the top of support seat (2) is provided with the forehead pad (21), and the both sides of support seat (2) are provided with swing head clamp (22), the front symmetry of mounting seat (3) is fixed with two carbon fiber rods (31), and carbon fiber rod (31) is respectively set in corresponding anti -skidding mechanism (1) inside.

2. The anti-slip structure for a frontal head clamp according to claim 1, wherein The anti -skidding mechanism (1) includes an anti -skidding sleeve (11) fixedly installed in the mounting hole of the support seat (2), and the anti -skidding sleeve (11) is internally provided with a sliding hole (12) matched with the carbon fiber rod (31).

3. The anti-slip structure for a frontal head clamp according to claim 2, wherein The sliding hole (12) is elliptical, and the long axis and the short axis of the cross section are different in size, which is used to limit the rotational movement of the carbon fiber rod (31) and increase the contact area.

4. The anti-slip structure for a frontal head clamp according to claim 2, wherein The top of the anti -skidding sleeve (11) is fixedly installed with a fixed block (13) on both sides of the periphery, and the fixed block (13) is internally provided with an internally threaded hole (14) in communication with the sliding hole (12).

5. The anti-slip structure for a frontal head clamp according to claim 4, wherein The anti -skidding mechanism (1) further includes a spring plunger (15) provided at the bottom with a ball (16) made of hard material for contacting the carbon fiber rod (31).

6. The anti-slip structure for a frontal head clamp according to claim 5, wherein The spring plunger (15) is externally provided with an externally threaded hole matched with the internally threaded hole (14), and the spring plunger (15) extends to the sliding hole (12) with the ball (16) abutting against the carbon fiber rod (31).

7. The anti-slip structure for a frontal head clamp according to claim 5, wherein The top of the spring plunger (15) is provided with an internally hexagonal groove (151) which is a hexagonal recess for cooperating with an internally hexagonal wrench to realize rotational operation.

8. The anti-slip structure for a frontal head clamp according to claim 1, wherein The forehead pad (21) is a flexible contact fixed on the top of the support seat (2) by adhesion or clamping, and is used to contact the forehead of the user and transmit downward pressure.

9. The anti-slip structure for a frontal head clamp according to claim 1, wherein The swing head clamp (22) is connected to the both sides of the support seat (2) by a hinge structure and can swing within a preset angle range for assisting in fixing the head.

10. The anti-slip structure for a frontal head clamp according to claim 1, wherein The carbon fiber rod (31) is installed on the front of the mounting seat (3) by bolt, adhesive or embedded fixing, and serves as a sliding guide rail of the support seat (2).

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