A head fixing device

Abstract

The present invention discloses a head fixing device, which is installed on a safety seat headrest lifting rod through a fixing bracket and rises and falls with the lifting rod, and comprises: a sliding module, which is subjected to an external force of the head and slides upward with the patient's head and is reset downward by a pulling force; an angle adjustment module, which is connected to the sliding module through an angle hinge and is used to adjust different forward tilt angles of the patient's head during diagnosis and treatment; and a head clamping module, which is connected to the angle adjustment module through a clamping hinge and is used to adjust the size of the head clamping module through the meshing spiral transmission of a symmetrical trapezoidal lead screw and a trapezoidal nut; the present invention has high comfort and is easy to operate, and the position of the seat is adjusted according to the patient's height to effectively fix the head position.

Description

Technical Field

[0001] The invention relates to a head fixing device, which is mainly used for a safety seat of a vertigo diagnosis and treatment system, and relates to the field of benign paroxysmal positional vertigo diagnosis and treatment instruments and other medical equipment fields that require maintaining the position of the head. Background Art

[0002] The vestibule is the main organ of human balance. The semicircular canals are important structures that sense changes in head position in the vestibule. The semicircular canals are divided into horizontal semicircular canals, superior semicircular canals and posterior semicircular canals. The planes where the three are located are perpendicular to each other, and they sense changes in head position in different planes. When the posture of the human body changes, the stimulation intensity of different semicircular canals is different. When the bilateral stimulation is unbalanced, nystagmus will occur, and the direction of nystagmus is toward the side with strong stimulation. Therefore, by accelerating or decelerating the rotation of different semicircular canal planes, the corresponding semicircular canals can be stimulated. Therefore, when accelerating or decelerating the rotation in different directions and planes, the balance of bilateral vestibular function and the corresponding semicircular canal function can be known by checking nystagmus; and the safety seat of the vertigo diagnosis and treatment system is a device used to fix the human body for semicircular canal function testing and then evaluate vestibular function. The main diagnosis and treatment principle of the vertigo diagnosis and treatment system is that by changing the posture of the human body and giving the human body different accelerations, the symptoms of positional vertigo in most patients can be clinically cured. In the process of changing the posture of the human body, if the relative position of the head and the body changes, it will have a great impact on the diagnosis and treatment results of vertigo.

[0003] For example, Chinese patent CN2018205086303 discloses a seat structure for a vertigo diagnosis and treatment system, including a seat and a rotating frame, the seat is fixed on the rotating frame, a plurality of straps are arranged on the seat, two sets of shoulder plate units are arranged on the backrest of the seat, the shoulder plate unit includes a shoulder plate and an up and down adjustment slider, the backrest has an up and down adjustment slide groove corresponding to the shoulder plate one by one, the up and down adjustment slide groove has a plurality of spaced thread grooves, the up and down adjustment slider is fixed on the outer wall of the shoulder plate, the up and down adjustment slider is limited in the up and down adjustment slide groove, the up and down adjustment slider has a positioning bolt, and the position of the shoulder plate can be fixed on the backrest after the positioning bolt is screwed into the thread groove; the bottom surface of the shoulder plate has a slot for reducing the sense of restraint caused by the binding of ropes and straps, but in the above patent, the position of the seat cannot be adjusted according to the height of the patient, and the head position cannot be effectively fixed.

[0004] For example, Chinese patent CN2018116100722 discloses a dual-track vertigo treatment swivel chair, in which a safety seat includes a seat frame and a head position lifting mechanism, a head forward extension mechanism and a head fixing device installed on the seat frame; the head position lifting mechanism drives the head forward extension mechanism and the head fixing device up and down through a guide rod; the position of the seat is adjusted according to the patient's height so that the patient maintains a natural and comfortable sitting posture. However, in the actual application of the above technology, there are the following shortcomings: 1. Because of the gap between the safety belt and the human body, the human body will move downward when in an inverted position, and the safety seat and the headrest are fixedly connected, so the human head will slide back and forth in the headrest and interfere with the worn video goggles. 2. The head forward extension mechanism is adjusted for forward and backward translation, which has poor comfort and is inconvenient to operate. Summary of the invention

[0005] Therefore, the purpose of the present invention is to overcome the defects of the safety seat of the vertigo diagnosis and treatment system in the prior art and to provide a head fixing device for use in the safety seat of the vertigo diagnosis and treatment system.

[0006] In order to achieve the above object, the present invention provides a head fixing device, which is installed on the safety seat headrest lifting rod through a fixing bracket and moves up and down with it, and the head fixing device includes:

[0007] A sliding module, wherein the sliding module is subjected to an external force from the head and slides upward along with the patient's head and is reset downward by a pulling force;

[0008] An angle adjustment module, which is connected to the sliding module through an angle hinge to adjust different angles of forward tilt of the patient's head during diagnosis and treatment;

[0009] And a head clamping module, which is connected to the angle adjustment module through a clamping hinge, and the size of the opening of the head clamping module is adjusted through the meshing spiral transmission of a symmetrical trapezoidal lead screw and a trapezoidal nut to fix the patient's head.

[0010] The sliding module includes a sliding guide rod, a sliding bracket and a tension spring; the sliding guide rod is fixedly installed on both sides of the fixed bracket; the sliding bracket slides up and down within the length range of the sliding guide rod; one end of the tension spring is connected to the sliding bracket, and the other end of the tension spring is connected and fixed to the fixed bracket.

[0011] The sliding module further comprises an oil-free bushing, which is sleeved on the sliding guide rod and forms a sliding fit with the sliding guide rod.

[0012] The angle hinges are symmetrically distributed on the left and right sides of the sliding bracket; the angle adjustment module includes a headrest bracket and a quick-release handle; the headrest bracket rotates within the sliding bracket with the angle hinge as the center; the quick-release handle is installed on the sliding bracket and adjusts the tightness of the headrest bracket and the sliding bracket.

[0013] The head clamping module includes a headrest bracket, a symmetrical trapezoidal screw and a trapezoidal nut; the headrest bracket is connected to the headrest bracket through the clamping hinge; one side of the headrest bracket is provided with soft foam to contact the human head, and one end of the other side of the headrest bracket is connected to the trapezoidal nut rotating shaft, and the trapezoidal nut and the symmetrical trapezoidal screw are in meshing transmission.

[0014] The headrest bracket includes a left side bracket and a right side bracket; the left side bracket is connected to the headrest bracket through two upper and lower clamping hinges, and the right side bracket is connected to the headrest bracket through two upper and lower clamping hinges.

[0015] The right side support bracket is centered on the clamping hinge, one side of which is provided with soft foam to contact the human head, and one end of the other side is connected to the trapezoidal nut rotating shaft; the left side support bracket is centered on the clamping hinge, one side of which is provided with soft foam to contact the human head, and one end of the other side is connected to the trapezoidal nut rotating shaft.

[0016] The trapezoidal nut includes a left-handed trapezoidal nut and a right-handed trapezoidal nut; the two ends of the symmetrical trapezoidal lead screw are respectively a left-handed trapezoidal thread and a right-handed trapezoidal thread, the left-handed trapezoidal thread meshes with the left-handed trapezoidal nut for spiral transmission, and the right-handed trapezoidal thread meshes with the right-handed trapezoidal nut for spiral transmission.

[0017] The head clamping module also includes a hand wheel, and the hand wheel is connected to the symmetrical trapezoidal lead screw through a flat key transmission or fixed connection.

[0018] A limit spring is installed between the symmetrical trapezoidal lead screw and the headrest bracket.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. High comfort, simple operation, the seat position can be adjusted according to the patient's height to effectively fix the head position.

[0021] 2. The sliding module of the head fixation device will slide upward along with the patient's head under the influence of slight external force on the head, and the sliding limit range is adjustable; when the patient is in a sitting position on the safety seat of the vertigo diagnosis and treatment system, the external force on the patient's head is basically released, and the sliding module of the head fixation device is reset downward under the tension of the tension spring.

[0022] 3. The angle adjustment module can adapt to the different treatment needs of the vertigo diagnosis and treatment system, ensuring that the patient's head is tilted forward at different angles during treatment.

[0023] 4. The head clamping module can adapt to people with different head sizes, quickly adjust the size of the headrest and self-lock to fix the patient's head. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the three-dimensional structure of the head fixing device of the present invention;

[0025] Figure 2 The figure is a right side structural schematic diagram of the head fixing device of the present invention;

[0026] Figure 3 The figure is a rear view structural schematic diagram of the head fixing device of the present invention;

[0027] Figure 4 The figure is a schematic diagram of the top view of the head fixing device of the present invention;

[0028] Figure 5 Shown is a schematic diagram of the three-dimensional structure of the sliding module of the present invention;

[0029] Figure 6 FIG. 1 is a schematic diagram of the right side structure of the sliding module of the present invention;

[0030] Figure 7 The figure shows a schematic diagram of the main structure of the sliding module of the present invention;

[0031] Figure 8 FIG. 1 is a schematic diagram of a top view of the sliding module of the present invention;

[0032] Fig. 9 FIG. 1 is a schematic diagram of the three-dimensional structure of the angle adjustment module of the present invention;

[0033] Fig.10 FIG. 1 is a schematic diagram of the right side structure of the angle adjustment module of the present invention;

[0034] Fig.11 The figure shows a schematic diagram of the main structure of the angle adjustment module of the present invention;

[0035] Fig.12 FIG. 1 is a schematic diagram of the top view of the angle adjustment module of the present invention;

[0036] Fig.13 Shown is a schematic diagram of the three-dimensional structure of the head clamping module of the present invention;

[0037] Fig.14 Shown is a right side structural schematic diagram of the head clamping module of the present invention;

[0038] Fig.15 The figure shows a schematic diagram of the front view structure of the head clamping module of the present invention;

[0039] Fig.16 Shown is a schematic diagram of the top view of the head clamping module of the present invention;

[0040] Fig.17 The figure is a schematic diagram of the angle adjustment module of the present invention in use state;

[0041] Fig.18 The angle adjustment module of the present invention is shown Fig.17 Schematic diagram of the middle angle adjustment state;

[0042] Fig.19 The figure shows a schematic diagram of the use state of the sliding module of the present invention;

[0043] Fig. 20 The slide module of the present invention is shown Fig.19 Schematic diagram of the use status of sliding up and down in the middle;

[0044] Fig.21 The figure is a schematic diagram of the head fixing device of the present invention in use;

[0045] Fig. 22 The head fixing device of the present invention is shown Fig.21 Adjust the usage status diagram.

[0046] In the attached drawings: 1 is the safety seat headrest lifting rod, 2 is the sliding module, 3 is the angle adjustment module, 4 is the head clamping module, 201 is the fixed bracket, 202 is the sliding guide rod, 203 is the oil-free bushing, 204 is the sliding bracket, 205 is the angle hinge, 301 is the headrest bracket, 302 is the quick release handle, 303 is the clamping hinge, 401 is the left side support bracket, 402 is the right side support bracket, 403 is the hand wheel, 404 is the symmetrical trapezoidal screw, 405 is the rotary trapezoidal nut, and 406 is the right-handed trapezoidal nut. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] refer to Figure 1-22 As shown, the present invention discloses a head fixing device, comprising a sliding module 2, an angle adjustment module 3 and a head clamping module 4;

[0049] The sliding module 2 includes a fixed bracket 201, a sliding guide rod 202, an oil-free bushing 203, a sliding bracket 204, an angle hinge 205, and a tension spring 206;

[0050] The angle adjustment module 3 includes a headrest bracket 301, a quick-release handle 302 and a clamping hinge 303;

[0051] The head clamping module 4 includes a headrest bracket, a hand wheel 403, a symmetrical trapezoidal screw rod 404 and a trapezoidal nut; the headrest bracket includes a left side bracket 401 and a right side bracket 402; the trapezoidal nut includes a left-handed trapezoidal nut 405 and a right-handed trapezoidal nut 406.

[0052] The fixing bracket 201 is installed on the safety seat headrest lifting rod 1 as the "frame" of the head fixing device. According to the height of the patient, the safety seat headrest lifting rod 1 can be adjusted up and down, and the head fixing device as a whole can be lifted up and down together with the safety seat headrest lifting rod 1.

[0053] refer to Figure 4-8 As shown, in the above sliding module 2,

[0054] The sliding guide rods 202 are fixedly installed on both sides of the fixed bracket 201 by bolt connection, wherein the sliding guide rods 202 on both sides are symmetrically installed.

[0055] The oil-free bushing 203 is rigidly connected to the sliding bracket 204. When a rigid connection is adopted, when one component is displaced or subjected to force, the component connected thereto does not displace or deform relative to the first component.

[0056] The oil-free bushing 203 is sleeved on the sliding guide rod 202 and forms a sliding fit with the sliding guide rod 202 .

[0057] The sliding bracket 204 slides up and down within the length range of the sliding guide rod 202 .

[0058] One end of the tension spring 206 is connected to the sliding bracket 204, and the other end of the tension spring is connected and fixed to the fixed bracket 201. When the sliding bracket 204 slides upward due to external force, the tension spring 206 is stretched to generate a reverse restoring elastic force. If the external force disappears, the sliding bracket 204 slides downward and resets.

[0059] In this embodiment, the sliding guide rod 202 is made of a smooth surface metal material and is distributed in pairs on both sides of the fixed bracket 201; the oil-free bushing 203 is made of a self-lubricating material such as brass, graphite, or Teflon, and the material hardness of the oil-free bushing 203 is lower than the material hardness of the sliding guide rod 202, so that the oil-free bushing 203 can be replaced after being worn out after long-term use.

[0060] In the above embodiment, the oil-free bushings 203 are grouped in two and are both sleeved on the sliding guide rod 202 , and cooperate with one sliding guide rod 202 to form a sliding assembly, providing more stable force support.

[0061] In the above embodiment, the sliding bracket 204 adopts a "J"-shaped sheet metal structure, which greatly reduces the volume of the head fixing device, saves installation space, and maximizes the designed sliding stroke within the outer volume of the head fixing device. Undoubtedly, the sliding bracket 204 can also adopt other forms to realize the up and down sliding of the head fixing device.

[0062] In the above embodiment, the number of the tension spring 206 can be one or more. Different numbers of the tension springs 206 can be installed according to the actual required reset force to achieve the adjustable reset force of the head fixing device.

[0063] refer to Figure 17-18 As shown, when the sliding module 2 of the present invention is used, when the patient is in an inverted position on the vertigo diagnosis and treatment system, there is a certain gap between the safety belt of the vertigo diagnosis and treatment system and the patient, so the patient will move upward. At this time, the sliding module of the head fixing device will slide upward with the patient's head due to a slight external force on the head, and its sliding limit range is adjustable; when the patient is in a sitting position on the vertigo diagnosis and treatment system, the external force on the patient's head is basically released, and the sliding module of the head fixing device is reset downward due to the pulling force of the tension spring 206.

[0064] In this embodiment, the sliding module 2 is further provided with an angle hinge 205 , and the angle hinge 205 is symmetrically distributed on the left and right sides of the sliding bracket 204 .

[0065] refer to Figure 9-12 As shown, in the above angle adjustment module structure,

[0066] The angle adjustment module 3 includes a headrest bracket 301, a quick-release handle 302 and a clamping hinge 303;

[0067] The angle hinge 205 is symmetrically distributed on the left and right sides of the sliding bracket 204. The angle hinge 205 serves as the rotation axis of the sliding bracket 204 and the headrest bracket 301. The headrest bracket 301 rotates within a specific angle range with the angle hinge 205 as the center. The rotation angle range of the headrest bracket 301 is preferably 0~30°. There is no doubt that the rotation angle range of the headrest bracket 301 is not limited to 0-30°, but can also be other angles to achieve its function.

[0068] In this embodiment, when the angle is adjusted, the sliding bracket 204 is fixed in the plane of the head fixing device, and the headrest bracket can rotate around the angle hinge. However, when the sliding module 2 is adjusted up and down, the sliding bracket 204 can slide up and down along the sliding guide rod 202.

[0069] The quick-release handle 302 is installed on the fixed bracket 201 and adjusts the tightness of the headrest bracket 301 and the sliding bracket. When the quick-release handle 302 is in a loose state, the headrest bracket 301 can freely adjust the angle. When the quick-release handle 302 is in a clamped state, the quick-release handle 302 clamps the headrest bracket 301 and the fixed bracket 201 and cannot be freely adjusted.

[0070] There are four clamping hinges 303 connected to the headrest bracket 301 . The four clamping hinges 303 are symmetrical in vertical and horizontal directions on the headrest bracket 301 . The two clamping hinges 303 on the right side are rotating hinges for the left side bracket 401 , and the two clamping hinges 303 on the left side are rotating hinges for the right side bracket 402 .

[0071] In the above embodiment, the angle hinge 205 is designed to adopt an axle pin bolt, so that it is easy to assemble and has a high assembly tolerance rate affected by processing accuracy. At the same time, the angle hinge 205 can also adopt other methods to make the headrest bracket 301 rotate within a specific angle range with the angle hinge 205 as the center.

[0072] refer to Fig.19 , 20 As shown, when the angle adjustment module 3 of the present invention is used, it can adapt to the different diagnosis and treatment requirements of the vertigo diagnosis and treatment system, and ensure that the patient's head is tilted forward at different angles during treatment. When in use, open the quick-release handle 302 to adjust the headrest to a suitable angle, lock the quick-release handle 302, and the quick-release handle 302 can be used to quickly and conveniently adjust the patient's head tilt angle.

[0073] refer to Figure 13-16 As shown, in the above-mentioned head clamping module 4,

[0074] The head clamping module 4 includes a headrest bracket, a hand wheel 403, a symmetrical trapezoidal lead screw 404 and a trapezoidal nut.

[0075] The headrest bracket is connected to the headrest bracket 301 through the clamping hinge 303; one side of the headrest bracket is provided with soft foam to contact the human head, and one end of the other side is connected to the trapezoidal nut shaft.

[0076] In the above embodiment, the headrest bracket includes a left side bracket 401 and a right side bracket 402; the trapezoidal nut includes a left-handed trapezoidal nut 405 and a right-handed trapezoidal nut 406; the left side bracket 401 is connected to the headrest bracket 301 through two upper and lower clamping hinges 303, and the left side bracket 401 is centered on the clamping hinge, and one side thereof is provided with soft foam to contact the human head, and one end of the other side is connected to the rotating shaft of the right-handed trapezoidal nut 406; the right side bracket 402 is connected to the headrest bracket 301 through two upper and lower clamping hinges 303, and the right side bracket 402 is centered on the clamping hinge, and one side thereof is provided with soft foam to contact the human head, and one end of the other side is connected to the rotating shaft of the left-handed trapezoidal nut 405.

[0077] The two ends of the symmetrical trapezoidal lead screw 404 are respectively a left-handed trapezoidal thread and a right-handed trapezoidal thread. The left-handed trapezoidal thread engages with the left-handed trapezoidal nut 405 for spiral transmission, while the right-handed trapezoidal thread engages with the right-handed trapezoidal nut 406 for spiral transmission. The symmetrical trapezoidal lead screw 404 and the left-handed trapezoidal nut 405 and the right-handed trapezoidal nut 406 are engaged in spiral transmission and are reverse self-locking. When in use, only the symmetrical trapezoidal lead screw 404 can rotate through spiral transmission, and the left-handed trapezoidal nut 405 and the right-handed trapezoidal nut 406 can produce translational motion.

[0078] The hand wheel 403 and the symmetrical trapezoidal screw rod 404 are connected by flat key transmission or fixed connection; when the hand wheel 403 is rotated clockwise, the symmetrical trapezoidal screw rod 404 rotates with it, and the left-handed trapezoidal nut 405 and the right-handed trapezoidal nut 406 move inward in opposite directions at the same speed, and the left side support bracket 401 and the right side support bracket 402 rotate inward in opposite directions at the same speed, reflecting the action of clamping the human head; when the hand wheel 403 is rotated counterclockwise, the symmetrical trapezoidal screw rod 404 rotates with it, and the left-handed trapezoidal nut 405 and the right-handed trapezoidal nut 406 move inward in opposite directions at the same speed, and the left side support bracket 401 and the right side support bracket 402 rotate outward in opposite directions at the same speed, reflecting the opening action.

[0079] A limit spring is installed between the symmetrical trapezoidal lead screw 404 and the headrest bracket 301 to limit the symmetrical trapezoidal lead screw 404 from moving left and right.

[0080] Soft foam is installed in the middle of the headrest bracket 301 to support the human head.

[0081] The head clamping module 4 can adapt to people with different head sizes, quickly adjust the size of the headrest and self-lock to fix the patient's head. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A head fixing device, characterized in that: The head fixing device is installed on the safety seat headrest lifting rod through a fixing bracket and moves up and down with it. The head fixing device includes: A sliding module, wherein the sliding module is subjected to an external force from the head and slides upward along with the patient's head and is reset downward by a pulling force; An angle adjustment module, which is connected to the sliding module through an angle hinge to adjust different angles of forward tilt of the patient's head during diagnosis and treatment; and a head clamping module, wherein the head clamping module is connected to the angle adjustment module through a clamping hinge, and the size of the opening of the head clamping module is adjusted through the meshing spiral transmission of a symmetrical trapezoidal lead screw and a trapezoidal nut to fix the patient's head; The sliding module comprises a sliding guide rod, a sliding bracket and a tension spring; the sliding guide rod is fixedly installed on both sides of the fixed bracket; the sliding bracket slides up and down within the length range of the sliding guide rod; one end of the tension spring is connected to the sliding bracket, and the other end of the tension spring is connected and fixed to the fixed bracket; The angle hinges are symmetrically distributed on the left and right sides of the sliding bracket; the angle adjustment module includes a headrest bracket and a quick-release handle; The headrest bracket rotates in the sliding bracket with the angle hinge as the center of the circle; the quick release handle is installed on the sliding bracket and adjusts the tightness between the headrest bracket and the sliding bracket; The sliding module further comprises an oil-free bushing, which is sleeved on the sliding guide rod and forms a sliding fit with the sliding guide rod.

2. The head fixing device according to claim 1, characterized in that: The head clamping module includes a headrest bracket, a symmetrical trapezoidal screw and a trapezoidal nut; the headrest bracket is connected to the headrest bracket through the clamping hinge; one side of the headrest bracket is provided with soft foam to contact the human head, and one end of the other side of the headrest bracket is connected to the trapezoidal nut rotating shaft, and the trapezoidal nut and the symmetrical trapezoidal screw are in meshing transmission.

3. The head fixing device according to claim 2, characterized in that: The headrest bracket includes a left side bracket and a right side bracket; the left side bracket is connected to the headrest bracket through two upper and lower clamping hinges, and the right side bracket is connected to the headrest bracket through two upper and lower clamping hinges.

4. The head fixing device according to claim 3, characterized in that: The right side support bracket is centered on the clamping hinge, one side of which is provided with soft foam to contact the human head, and one end of the other side is connected to the trapezoidal nut rotating shaft; the left side support bracket is centered on the clamping hinge, one side of which is provided with soft foam to contact the human head, and one end of the other side is connected to the trapezoidal nut rotating shaft.

5. The head fixing device according to claim 4, characterized in that: The trapezoidal nut includes a left-handed trapezoidal nut and a right-handed trapezoidal nut; the two ends of the symmetrical trapezoidal lead screw are respectively a left-handed trapezoidal thread and a right-handed trapezoidal thread, the left-handed trapezoidal thread meshes with the left-handed trapezoidal nut for spiral transmission, and the right-handed trapezoidal thread meshes with the right-handed trapezoidal nut for spiral transmission.

6. The head fixing device according to claim 2, characterized in that: The head clamping module also includes a hand wheel, and the hand wheel is connected to the symmetrical trapezoidal lead screw through a flat key transmission or fixed connection.

7. The head fixing device according to claim 2, characterized in that: A limit spring is installed between the symmetrical trapezoidal lead screw and the headrest bracket.

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