CN115316932B - A head fixing device for ophthalmic examination - Google Patents
A head fixing device for ophthalmic examination Download PDFInfo
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- CN115316932B CN115316932B CN202210993242.XA CN202210993242A CN115316932B CN 115316932 B CN115316932 B CN 115316932B CN 202210993242 A CN202210993242 A CN 202210993242A CN 115316932 B CN115316932 B CN 115316932B
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0083—Apparatus for testing the eyes; Instruments for examining the eyes provided with means for patient positioning
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Abstract
本发明涉及医用头部固定装置领域，具体的说是一种眼科检查用头部固定装置；本发明所述的一种眼科检查用头部固定装置，通过设置底座、转盘、滑柱、滑杆、液压杆、液压管和护衬，既实现液压管的同步运动，实现对患者头部的同步定位，也通过液压杆和液压管之间的相对滑动吗，实现液压杆根据患者头部的形状进行单个的调整，从而使患者的头部与液压杆上固连的护衬贴合，实现对患者头部固定的同时，使压力均匀，提高患者的舒适度。
The present invention relates to the field of medical head fixation devices, and more specifically to a head fixation device for ophthalmic examinations. The head fixation device for ophthalmic examinations described in the present invention, by providing a base, a turntable, a sliding column, a sliding rod, a hydraulic rod, a hydraulic pipe and a protective liner, not only realizes the synchronous movement of the hydraulic pipe and the synchronous positioning of the patient's head, but also realizes the individual adjustment of the hydraulic rod according to the shape of the patient's head through the relative sliding between the hydraulic rod and the hydraulic pipe, so that the patient's head fits with the protective liner fixed to the hydraulic rod, and at the same time, the pressure is evenly distributed while fixing the patient's head, thereby improving the patient's comfort.
Description
Technical Field
The invention relates to the field of medical head fixing devices, in particular to a head fixing device for ophthalmic examination.
Background
The head fixing device for ophthalmic examination is a fixing device used in the ophthalmic examination of a hospital, and is mainly used for fixing the head position of a patient, so that the patient is prevented from moving relatively between the patient and equipment in the examination process, the examination result is inaccurate or the examination result is rechecked, and the time of the patient and a doctor is wasted.
In the prior art, the positions of the heads of the patients are fixed by using a plurality of positioning rods distributed in a staggered way, however, the heads are mainly placed in a space frame by the patients, the heads are controlled not to deviate by the self-force of the patients, and for patients with serious diseases or patients with special diseases, such as patients with serious diseases, hyperkinetic symptoms, epilepsy and the like, the patients are difficult to fix the positions of the heads by using the self-force and do not deviate in the examination process, so that the examination of doctors is troublesome.
The head fixing device for ophthalmic examination can help the head of a severe patient and a patient with special diseases to fix, and further improve the pressure of the fixing device on the head of the patient, so that the comfort of the patient is improved, and the examination of an ophthalmic doctor is facilitated.
Disclosure of Invention
In order to make up the deficiency of the prior art, the head fixing device for ophthalmic examination solves the problem that the head fixing device for ophthalmic examination in the prior art is difficult to effectively fix partial serious patients or patients with some special diseases.
The technical scheme adopted for solving the technical problems is as follows: the head fixing device for ophthalmic examination comprises a shell, a bottom plate, a supporting plate, a limiting plate and a fixing plate, wherein the supporting plate is fixedly connected above the bottom plate;
the base has linked firmly the base in the backup pad, and the base is annular, and the base is located the backup pad outside and is close to the one end of limiting plate.
The rotary table is rotationally connected with the outside of the base, evenly distributed sliding grooves are formed in the rotary table, the sliding grooves are obliquely arranged, and a motor capable of driving the rotary table to rotate is fixedly connected below the bottom plate.
The sliding column is connected with a sliding rod in a sliding manner, the sliding column is fixedly connected with the sliding rod, the sliding column is connected with the supporting plate in a sliding manner, the sliding column can slide towards the center of the turntable, and one end, far away from the sliding rod, of the sliding column is fixedly connected with an elastic lining.
Preferably, a hydraulic pipe and a hydraulic rod which can slide mutually are fixedly connected between the sliding column and the protective lining, the hydraulic pipe is fixedly connected on the sliding column, an oil pipe is communicated between the hydraulic pipe which is uniformly distributed, the oil pipe and the hydraulic pipe are filled with hydraulic oil, the upper end of the sliding column at the highest position is fixedly connected with an adjusting barrel, the lower end of the adjusting barrel is communicated with the oil pipe, and a balancing weight is connected in the adjusting barrel in a sliding manner.
Preferably, the bottom of the adjusting barrel is rotationally connected with a c-shaped ring, a notch of the c-shaped ring is opposite to the oil pipe, a rotating rod is fixedly connected to the outer side of the c-shaped ring and is in sliding connection with the side wall of the adjusting barrel, an elastic rope is fixedly connected between the rotating rod and the adjusting barrel, a baffle is fixedly connected to the base, the baffle is located below the end part of the sliding groove, which is close to the inner side of the rotating disc, the baffle can enable the rotating rod to rotate when the sliding rod slides to one end of the sliding groove, which is close to the inner side of the rotating disc, and the rotating rod rotates to drive the c-shaped block to rotate and enable the notch of the c-shaped block to be staggered with the opening position of the oil pipe.
Preferably, the screw drive in the regulating barrel is provided with an adjusting block, a spring is fixedly connected between the adjusting block and the balancing weight, the elastic coefficient of the spring is smaller than 1N/mm, the liquid level difference caused by patients with different head circumference sizes is smaller than 0.3mm, the pressure change in the hydraulic oil can be caused, the elastic coefficient of the spring is smaller than 1N/mm, and the pressure change of the hydraulic oil is extremely small when the hydraulic oil faces different patients.
Preferably, an adjusting pipe is fixedly connected in the adjusting barrel, an adjusting rod is slidably connected in the adjusting pipe, a semicircular stop block is fixedly connected at the lower end of the adjusting rod, a first one-way valve is communicated with the adjusting barrel at the lower part of the adjusting pipe, a second one-way valve is communicated between the bottom of the adjusting pipe and the hydraulic pipe, and hydraulic oil in the adjusting barrel can flow to the hydraulic pipe sequentially through the first one-way valve and the second one-way valve.
Preferably, the bottom end of the sliding column is fixedly connected with a buffer barrel, the buffer barrel is provided with evenly distributed vent holes, the buffer barrel is in sliding connection with the supporting plate, the hydraulic rod is in sliding connection with the buffer barrel, and the hydraulic rod is fixedly connected with a buffer block.
Preferably, the buffer barrel is provided with a vent groove at one end close to the sliding column, the aperture of the vent hole is gradually enlarged outwards from the axis, and the holes at the outer sides of the vent hole are contacted with each other, so that the air suction efficiency is improved to the greatest extent.
Preferably, the buffer barrel is of a double-layer structure, a filter screen is embedded between the double-layer buffer barrels, and the filter screen can slide in a double-layer crack of the buffer barrel so as to be convenient for replacing the filter screen.
Preferably, the curve equation of the sliding chute track on the turntable is Archimedes spiral, the human head circumference is generally between 54cm and 58cm, the diameter range is about 0.6cm after the human head circumference is approximately seen as a circle, and the necessary gap is added, so that the projection distance of the sliding chute curve on the diameter of the turntable is more than 1cm, and the curve can be suitable for patients with different head sizes.
Preferably, the track curve of the sliding groove on the rotary table is a chord which does not pass through the center of the circle on the rotary table, and the projection distance of the track curve of the sliding groove on the rotary table is more than 1cm so as to adapt to patients with different head sizes.
The beneficial effects of the invention are as follows:
1. according to the head fixing device for ophthalmic examination, through the arrangement of the base, the rotary table, the slide column, the slide rod, the hydraulic pipe and the protective lining, synchronous movement of the hydraulic pipe is achieved, synchronous positioning of the head of a patient is achieved, and through relative sliding between the hydraulic rod and the hydraulic pipe, single adjustment of the hydraulic rod according to the shape of the head of the patient is achieved, so that the head of the patient is attached to the protective lining fixedly connected to the hydraulic rod, the head of the patient is fixed, pressure is uniform, and comfort level of the patient is improved.
2. According to the head fixing device for ophthalmic examination, the hydraulic system is adjusted by arranging the adjusting barrel, the adjusting pipe, the adjusting rod, the first one-way valve, the second one-way valve and the c-shaped block, so that the pressure of the hydraulic system after the head of a patient is fixed can be adjusted, the temporary adjustment of the hydraulic system can be controlled, and the automatic reset after the temporary adjustment is convenient and fast.
3. According to the head fixing device for ophthalmic examination, disclosed by the invention, the buffer barrel, the filter screen and the buffer block are arranged, so that the movement state of the hydraulic rod and the hydraulic pipe during relative movement is realized, dust can be filtered to prevent the hydraulic system from being blocked, and on the other hand, a patient can be quickly separated from equipment under an emergency condition, so that the safety of the patient is further ensured.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a perspective view of the conditioning and buffer tanks;
FIG. 4 is a cross-sectional view of the internal structure of FIG. 2;
fig. 5 is a schematic view of a c-ring structure.
In the figure: 1. a housing; 11. a bottom plate; 12. a support plate; 13. a limiting plate; 14. a base; 15. a motor; 2. a turntable; 21. a chute; 3. a spool; 31. a slide bar; 32. a hydraulic pipe; 33. a hydraulic rod; 34. a protective lining; 4. an oil pipe; 5. an adjusting barrel; 51. balancing weight; 52. adjusting the block; 53. a spring; 54. an adjusting tube; 55. an adjusting rod; 56. a stop block; 57. a first one-way valve; 58. a second one-way valve; 6. a c-ring; 61. a rotating lever; 62. an elastic rope; 64. a baffle; 7. a buffer barrel; 71. a vent hole; 72. a buffer block; 73. a filter screen; 74. and a ventilation groove.
Detailed Description
The invention is further described in order to make the technical solution realized by the invention more clear.
As shown in fig. 1 to 5;
embodiment one;
The head fixing device for ophthalmic examination comprises a shell 1, a bottom plate 11, a supporting plate 12 and a limiting plate 13, wherein the supporting plate 12 is fixedly connected above the bottom plate 11, and the limiting plate 13 is fixedly connected on the upper part of the supporting plate 12;
the base 14 is fixedly connected to the supporting plate 12, the base 14 is annular, and the base 14 is positioned at one end, close to the limiting plate 13, of the outer side of the supporting plate 12;
The outer side of the base 14 is rotationally connected with the turntable 2, the turntable 2 is provided with evenly distributed sliding grooves 21, the sliding grooves 21 are obliquely arranged, and the bottom plate 11 is fixedly connected with a motor 15 which can drive the turntable 2 to rotate;
The sliding column 3 is connected with the sliding rod 31 in a sliding way in the sliding groove 21, the sliding column 3 is fixedly connected with the sliding rod 31, the sliding column 3 is connected with the supporting plate 12 in a sliding way, the sliding column 3 can slide towards the center of the turntable 2, and one end, far away from the sliding rod 31, of the sliding column 3 is fixedly connected with the elastic protection lining 34.
When in use, the chin of a patient is placed on the bottom plate 11, the forehead is attached to the limiting plate 13, the head position of the patient is approximately fixed, then the motor 15 is started to rotate by using the control system, the motor 15 drives the turntable 2 to rotate, so that the slide bar 31 in the inclined slide groove 21 slides from one end close to the outer side of the turntable 2 to one end close to the inner side of the turntable 2, and because the slide column 3 fixedly connected with the slide bar 31 is in sliding connection with the supporting plate 12, the inner wall of the slide groove 21 can generate thrust to the slide bar 31 while the slide bar 31 slides in the slide groove 21, so that the slide column 3 fixedly connected with the slide bar and the protective lining 34 slide inwards on the supporting plate 12, during the process that the slide bar 31 slides to one end close to the inner side of the turntable 2, part of the protective lining 34 slides to be contacted with the head of the patient due to the difference of the head shape of different people, at the moment, the slide column 3 continues to slide inwards, since the protective lining 34 is respectively acted by the pressure of the sliding column 3 and the head of the patient, the elastic protective lining 34 is deformed, and the protective lining 34 at other parts is gradually contacted with the head of the patient along with the deformation of the protective lining 34, so as to gradually fix the head of the patient in the space surrounded by the protective lining 34, the limiting plate 13 and the supporting plate 12, realize the fixation of the head of the patient, then a doctor starts to inspect the eyes of the patient, after the inspection is finished, the motor 15 is reversed by the control system, so that the sliding rod 31 slides in the inclined sliding groove 21 in a direction away from the head of the patient, thereby driving the sliding column 3 and the protective lining 34 fixedly connected with the sliding rod to be separated from the fixation of the head of the patient, therefore, the fixation of the head of a serious patient and a patient with special diseases can be assisted through the linkage of the turntable 2, the sliding rod 31 and the protective lining 34, is convenient for the ophthalmologist to check.
The hydraulic cylinder 3 and the protective lining 34 are fixedly connected with a hydraulic pipe 32 and a hydraulic rod 33, the hydraulic rod 33 slides in the hydraulic pipe 32, the hydraulic pipe 32 is fixedly connected to the sliding cylinder 3, the hydraulic rod 33 is fixedly connected with the protective lining 34, an oil pipe 4 is communicated between the hydraulic pipe 32, the oil pipe 4 and the hydraulic pipe 32 are filled with hydraulic oil, the upper end of the sliding cylinder 3 at the highest position is fixedly connected with an adjusting barrel 5, the lower end of the adjusting barrel 5 is communicated with the oil pipe 4, and a balancing weight 51 is connected in the adjusting barrel 5 in a sliding manner.
When in use, the rotation of the motor 15 drives the turntable 2 to rotate, the protective lining 34 is moved towards the head of a patient through the transmission of the slide rod 31 and the slide column 3, after the protective lining 34 is contacted with the head of the patient, the protective lining 34 and the hydraulic rod 33 fixedly connected with the protective lining 34 cannot continuously move inwards due to the pressure of the head of the patient on the protective lining 34, at the moment, the turntable 2 still rotates, the hydraulic tube 32 fixedly connected with the slide column 3 still slides towards the head of the patient, the hydraulic tube 32 and the hydraulic rod 33 relatively slide, part of hydraulic oil in the hydraulic tube 32 is extruded into the oil tube 4 and finally flows into the regulating barrel 5 communicated with the oil tube 4, as the turntable 2 continuously rotates, when the slide rod 31 slides to one end of the slide groove 21 close to the inner side, the protective lining 34 at different positions is contacted with the head of the patient to fix the protective lining, at the moment, the hydraulic pipes 32 and the hydraulic rods 33 at different positions are slid relatively, so that the hydraulic oil in the hydraulic pipes 32 at different positions is extruded into the regulating barrel 5 through the oil pipe 4, the balancing weight 51 which is connected with the inside of the regulating barrel 5 in a sliding way is extruded, the balancing weight 51 slides upwards, the pressure of the hydraulic oil born by the hydraulic rods 33 at different positions is equal to the pressure of the balancing weight 51 on the hydraulic oil due to the characteristic that the pressure inside the fluid is equal to the pressure of the hydraulic oil, the pressure of the hydraulic oil born by the hydraulic rods 33 is the product of the pressure inside the hydraulic oil and the cross section area of the hydraulic rods 33, the pressure of the hydraulic oil born by the hydraulic rods 33 at different positions is the same, the pressure of the protective lining 34 at different positions fixedly connected with the protective lining is the same to the head of a patient, the patient feels more comfortable, and the patient with different head sizes, the patient with a larger head can slide the balancing weight 51 upwards by a larger distance, but the pressure in the hydraulic oil is the pressure of the balancing weight 51 on the hydraulic oil, and the balancing weight 51 is not changed, so that the pressures of the patients with different head sizes are equal, and the pressure of the protection liners 34 of the patients with different head sizes can be the same by only selecting the proper balancing weight 51, so that the patient with different head sizes is more convenient.
The bottom of the adjusting barrel 5 is rotationally connected with a c-shaped ring 6, a notch of the c-shaped ring 6 is opposite to the opening of the oil pipe 4, the outer side of the c-shaped ring 6 is fixedly connected with a rotating rod 61, the rotating rod 61 is in sliding connection with the side wall of the adjusting barrel 5, an elastic rope 62 is fixedly connected between the rotating rod 61 and the adjusting barrel 5, a baffle plate 64 is fixedly connected to the base 14, the baffle plate 64 is positioned below the end part of the sliding groove 21, which is close to the inner side of the rotating disc 2, and when the sliding rod 31 slides to the position of the sliding groove 21, which is close to the inner side of the rotating disc 2, the baffle plate 64 enables the rotating rod 61 to rotate.
When the hydraulic pressure regulator is used, when the slide bar 31 slides to one end of the slide bar 31, which is close to the inner side of the turntable 2, hydraulic oil flows into the regulating barrel 5 under pressure of the balancing weight 51, so that the head of a patient is fixed, the baffle plate 64 is fixedly connected to the base 14, the baffle plate 64 is positioned below the end of the slide bar 21, which is close to the inner side of the turntable 2, and the baffle plate 64 firstly rotates the rotating rod 61 when the slide bar 31 slides to one end of the slide bar 21, which is close to the inner side of the turntable 2, so that the rotating rod 61 drives the c-shaped ring 6 to rotate, a notch of the c-shaped ring 6 is staggered with an opening of the oil pipe 4, hydraulic oil cannot flow into the regulating barrel 5 any more, so that the hydraulic oil in the hydraulic pipe 32 and the oil pipe 4 cannot flow any more, at the moment, if the head of the patient is required to move, the pressure from the balancing weight 51 is overcome, the compression of the hydraulic oil is required, the hydraulic rod 33 can slide, the head rotation is realized, after the doctor checks, the rotating of the head is finished, the rotating of the turntable 2 is controlled to rotate, the slide bar 31 is made to slide to the other side of the slide bar 21, and the rotating rod 61 is rotated under the driving of the elastic rope 62, so that the c-shaped block opening is communicated with the living line, so that the hydraulic pressure is difficult to be increased, and the actual pressure of the head compression of the head of the patient can be realized, and the head of the patient is further, and the pressure of the patient is difficult to be increased.
An adjusting block 52 is spirally driven in the adjusting barrel 5, and a spring 53 is fixedly connected between the adjusting block 52 and the balancing weight 51.
When the hydraulic system is in a balanced state, the internal pressure is the ratio of the sum of the gravity of the balancing weight 51 and the elastic force of the spring 53 to the cross section area of the balancing weight 51, when the adjusting block 52 is moved upwards, the internal pressure is the ratio of the difference of the gravity of the balancing weight 51 and the elastic force of the spring 53 to the cross section area of the balancing weight 51, and when the adjusting block 52 is moved upwards, the internal pressure of the hydraulic system in the balanced state is adjusted by rotating the adjusting block 52, especially when a doctor finds that under a certain set pressure, the protective lining 34 is difficult to effectively fix the head of a patient frequently or the pressure is too large after the head of the patient is fixed frequently, and the pressure can be readjusted by rotating the adjusting block 52.
The regulating barrel 5 is fixedly connected with a regulating pipe 54, a regulating rod 55 is slidably connected in the regulating pipe 54, an arc-shaped stop block 56 is fixedly connected to the lower end of the regulating rod 55, a first one-way valve 57 is communicated between the lower part of the regulating pipe 54 and the regulating barrel 5, a second one-way valve 58 is communicated between the bottom of the regulating pipe 54 and the hydraulic pipe 32, and hydraulic oil in the regulating barrel 5 can flow to the hydraulic pipe 32 sequentially through the first one-way valve 57 and the second one-way valve 58.
When the sliding rod 31 slides to one end of the sliding groove 21 near the inner side of the turntable 2, if the pressure felt by individual patients is too small and the head can still shake easily, the internal pressure is fixed, the head of the patient is required to be separated from the fixation by reversing the motor 15, then the adjusting block 52 is adjusted, whether the adjusted pressure is suitable for being determined according to the feeling of the patient, and the adjustment is possibly troublesome, at this time, the adjusting rod 55 in the adjusting pipe 54 is rotated to enable the arc-shaped stop 56 to be far away from the first one-way valve 57, then the adjusting rod 55 is moved upwards, negative pressure is generated in the adjusting pipe 54, so that the hydraulic oil in the adjusting barrel 5 flows into the adjusting pipe 54 through the first one-way valve 57 under the pushing of the pressure, the hydraulic oil pressure in the adjusting pipe 54 is increased by pressing the adjusting rod 55, so that the hydraulic oil in the regulating pipe 54 flows to the hydraulic pipe 32 through the second one-way valve 58 under the action of pressure, in the process, due to the characteristic of the one-way valve, when the regulating rod 55 moves upwards, the hydraulic oil in the hydraulic pipe 32 cannot enter the regulating pipe 54, when the regulating rod 55 presses downwards, the hydraulic oil in the regulating pipe 54 cannot flow back into the regulating barrel 5, so that the hydraulic oil in the regulating barrel 5 is transferred into the hydraulic pipe 32 and the oil pipe 4 through the upward movement and the downward movement of the regulating rod 55, the hydraulic pressure in the hydraulic pipe 32 and the oil pipe 4 is increased, the pressure is finally transferred to the hydraulic rod 33 and the protective lining 34, so that the pressure of the protective lining 34 to the head of a human body is increased, in the process of pressing the regulating rod 55, a doctor can stop pressing the regulating rod 55 at any time according to the feedback of a patient, so as to keep the pressure, after the regulation, the regulating rod 55 in the regulating pipe 54 is rotated, when the doctor finishes checking, the position of the arc-shaped stop block 56 blocking the first one-way valve 57 is returned to the initial position by the rotating rod 61 under the action of the tension of the elastic rope 62, and the opening of the c-shaped ring 6 and the oil pipe 4 automatically restore the pressure intensity in the hydraulic system to the initial state, so that single adjustment is realized for patients in certain cases, the adjustment is not needed by repeatedly adjusting the adjusting block 52, and the time is saved.
The buffer barrel 7 is fixedly connected to the bottom of the sliding column 3, the buffer barrel 7 is provided with evenly distributed vent holes 71, the buffer barrel 7 is in sliding connection with the supporting plate 12, the hydraulic rod 33 is in sliding connection with the buffer barrel 7, and the buffer block 72 is fixedly connected to the hydraulic rod 33.
In use, through fixedly connecting the buffer barrel 7 at the bottom of the slide column 3, the support to the two ends of the hydraulic rod 33 is realized through the buffer barrel 7 and the hydraulic pipe 32, the end of the hydraulic rod 33, which is fixedly provided with the protective lining 34, can be prevented from bending due to gravity, in some emergency situations, such as the situation that the internal pressure system pipeline is blocked to increase the hydraulic pressure so as to cause discomfort of a patient, and in the situation that the patient has some diseases, the patient needs to quickly separate from the equipment so as to prevent danger, at the moment, the motor 15 is reversed through the control system, the hydraulic rod 33 is driven by the slide column 3 to move away from the head of the patient, however, when the hydraulic rod 33 is instantaneously separated from the head of the patient, the balance state of the hydraulic rod 33 can be broken, so that the hydraulic rod 33 can slide in the hydraulic pipe 32 towards the head of the patient under the pressure of the hydraulic oil, the patient can not quickly separate from the equipment, the patient can compress the air in the moving direction and discharge the air in the air through the ventilation hole 71 when the buffer block 72 is arranged in the sliding connection with the buffer barrel 7, and the diameter of the air in the moving direction can be slower, the air in the situation that the air discharge is slower, so that the air can quickly separate from the motor 33 from the head of the patient in the direction of the patient in the contact with the hydraulic rod 33 with the safety device when the patient is quickly and the head of the patient is quickly separated from the head of the patient.
The buffer vessel 7 is provided with a vent groove 74 at one end thereof adjacent to the spool 3, and the aperture of the vent hole 71 is gradually enlarged from the axis to the outside.
When the sliding rod 31 slides to one side of the sliding groove 21 close to the turntable 2 to fix the head of a patient, after the protective lining 34 contacts with the head of the patient, under the action of the pressure of the head of the patient, the hydraulic rod 33 can slide relatively to the hydraulic tube 32, the hydraulic rod 33 can receive the air resistance transmitted by the buffer block 72 in the sliding process, the secondary air resistance can be transmitted to the head of the patient through the hydraulic rod 33 and the protective lining 34, the pressure received by the head of the patient is increased, at the moment, the air in the moving direction of the buffer block 72 is quickly discharged through the ventilation groove 74 arranged at one end of the buffer barrel 7 close to the sliding column 3, the negative pressure is generated at the other side of the buffer block 72, the aperture of the ventilation hole 71 is gradually enlarged outwards from the axis, and the air quickly enters the other side of the buffer block 72 through the narrow tube effect, so that the air resistance received by the opposite sliding of the hydraulic rod 33 and the hydraulic tube 32 is reduced, and the pressure received by the head of the patient is reduced, and the patient feels more comfortable.
The buffer barrel 7 has a double-layer structure, and a filter screen 73 is embedded between the double-layer buffer barrel 7.
During the use, because the sliding connection of hydraulic pipe 32 and hydraulic stem 33, and through hydraulic drive, it is more accurate to need leakproofness and the cooperation between hydraulic pipe 32 and the hydraulic stem 33, and because the hydraulic stem 33 produces static adsorption dust easily in the in-process of friction, the dust mixes easily in the gap that hydraulic pipe 32 and hydraulic stem 33 slided each other, the resistance when increasing hydraulic stem 33 and slide, even perhaps unable slip, therefore make buffer tank 7 be bilayer structure, inlay filter screen 73 between the double-deck buffer tank 7, make the dust be filtered by filter screen 73 and be difficult to be adsorbed on hydraulic stem 33, and change filter screen 73 easily, thereby improve the stability of hydraulic stem 33 in-process of sliding, further improve patient's comfort level.
Embodiment two;
The second embodiment differs from the first embodiment in that;
The track curve equation of the chute 21 is archimedes spiral.
When the device is used, the curve equation of the track of the sliding groove 21 is Archimedean spiral, and by the characteristic of the Archimedean spiral, when the turntable 2 is driven by the motor 15 connected with the turntable through the gear pair to rotate at a constant speed, the sliding rod 31 slides in the sliding groove 21, the sliding column 3 fixedly connected with the turntable slides in the supporting plate 12 at a constant speed, the sliding rod 31 receives the extrusion force from the inner wall of the sliding groove 21 along the axis direction of the sliding column 3, so that the pressure on the inner wall of the supporting plate 12 received when the sliding column 3 moves along the axis direction of the sliding column is minimum, the sliding column 3 is smoother in the sliding process, the shaking caused by the friction resistance of the supporting plate 12 in the process of contacting and compressing the head of a patient is reduced by the hydraulic rod 33, and the patient feels more comfortable.
Embodiment three;
the third embodiment differs from the first embodiment in that;
the track curve of the chute 21 on the turntable 2 is a chord which does not pass through the circle center of the turntable 2.
When the head-to-head pressure sensor is used, the track curve of the sliding groove 21 on the turntable 2 is the chord of the circle center of the turntable 2, when the turntable 2 rotates at a constant angular speed, assuming that the center of the turntable 2 is the circle center, the function of the track equation is (y is the ordinate of the function and is the included angle between the function and the x axis, a is the intersection point of the function and the y axis), now, assuming that the sliding rod 31 is positioned at the intersection point of the function and the y axis, namely the coordinates are (0, a), the coordinates of the center of the turntable 2 are (0, 0), the distance between the sliding rod 31 and the center of the turntable 2 is a, after the function rotates around the origin, the original intersection point (0, a) is the coordinates of (a, a), the increment of the curve in the y direction is the image of the curve, and when the turntable 2 rotates from the outside of the turntable 2 to the inside of the turntable 2, the moving distance of the sliding rod 31 in unit time is the sine function, in the interval of 0-90 DEG of the y axis, the value change is slower and slower, and the speed is in direct proportion to the distance between the sliding rod 31 and the sliding rod 33 and the head of the patient is expected to move towards the head of the patient, and the head is expected to be in contact with the head of the patient, and the head is more and lower when the head is in contact with the head of the patient is in the patient.
Claims (9)
1. The utility model provides a head fixing device for ophthalmology inspection, includes casing (1), bottom plate (11), backup pad (12) and limiting plate (13), backup pad (12) link firmly in bottom plate (11) top, and limiting plate (13) link firmly on backup pad (12) upper portion, its characterized in that: also comprises;
The base (14) is fixedly connected to the supporting plate (12), the base (14) is annular, and the base (14) is positioned at one end, close to the limiting plate (13), of the outer side of the supporting plate (12);
the rotary table (2) is rotationally connected with the outer side of the base (14), evenly distributed sliding grooves (21) are formed in the rotary table (2), the sliding grooves (21) are obliquely arranged, and a motor (15) capable of driving the rotary table (2) to rotate is fixedly connected below the bottom plate (11);
the sliding column (3) is connected with the sliding rod (31) in a sliding way in the sliding groove (21), the sliding rod (31) is fixedly connected with the sliding column (3), the sliding column (3) is connected with the supporting plate (12) in a sliding way, the sliding column (3) can slide towards the center of the turntable 2, and one end, far away from the sliding rod (31), of the sliding column (3) is fixedly connected with the elastic protection lining (34);
The hydraulic cylinder (3) and the protection lining (34) are fixedly connected with a hydraulic pipe (32) and a hydraulic rod (33) which can slide mutually, the hydraulic pipe (32) is fixedly connected to the sliding cylinder (3), the hydraulic rod (33) is fixedly connected with the protection lining (34), an oil pipe (4) is communicated between the hydraulic pipes (32) which are uniformly distributed, hydraulic oil is filled in the oil pipe (4) and the hydraulic pipe (32), an adjusting barrel (5) is fixedly connected to the upper end of the sliding cylinder (3) at the highest position, the lower end of the adjusting barrel (5) is communicated with the oil pipe (4), and a balancing weight (51) is connected in the adjusting barrel (5) in a sliding mode.
2. The head restraint for ophthalmic examinations according to claim 1, characterized in that: the bottom of the adjusting barrel (5) is rotationally connected with a c-shaped ring (6), a notch of the c-shaped ring (6) is right opposite to the oil pipe (4), a rotating rod (61) is fixedly connected to the outer side of the c-shaped ring (6), the rotating rod (61) is in sliding connection with the side wall of the adjusting barrel (5), an elastic rope (62) is fixedly connected between the rotating rod (61) and the adjusting barrel (5), a baffle (64) is fixedly connected to the base (14), the baffle (64) is located below the end part of the sliding groove (21) close to the inner side of the rotating disc (2), and the baffle (64) can enable the rotating rod (61) to rotate when the sliding rod (31) slides to one end of the sliding groove (21) close to the inner side of the rotating disc (2).
3. A head restraint for ophthalmic examinations according to claim 2, characterized in that: an adjusting block (52) is spirally driven in the adjusting barrel (5), and a spring (53) is fixedly connected between the adjusting block (52) and the balancing weight (51).
4. A head restraint for ophthalmic examinations according to claim 3, characterized in that: an adjusting pipe (54) is fixedly connected in the adjusting barrel (5), an adjusting rod (55) is connected in the adjusting pipe (54) in a sliding mode, a semicircular stop block (56) is fixedly connected to the lower end of the adjusting rod (55), a first one-way valve (57) is communicated with the adjusting barrel (5) at the lower portion of the adjusting pipe (54), a second one-way valve (58) is communicated between the bottom of the adjusting pipe (54) and the hydraulic pipe (32), and hydraulic oil in the adjusting barrel (5) can flow to the hydraulic pipe (32) sequentially through the first one-way valve (57) and the second one-way valve (58).
5. The head restraint for ophthalmic examinations according to claim 1, characterized in that: the bottom end of the sliding column (3) is fixedly connected with a buffer barrel (7), vent holes (71) which are uniformly distributed are formed in the buffer barrel (7), the buffer barrel (7) is in sliding connection with the supporting plate (12), a hydraulic rod (33) is in sliding connection with the buffer barrel (7), and a buffer block (72) is fixedly connected on the hydraulic rod (33).
6. The head restraint for ophthalmic examinations according to claim 5, characterized in that: one end of the buffer barrel (7) close to the slide column (3) is provided with a vent groove (74), and the aperture of the vent hole (71) is gradually enlarged outwards from the axis.
7. The head restraint for ophthalmic examinations according to claim 6, characterized in that: the buffer barrels (7) are of a double-layer structure, and a filter screen (73) is embedded between the double-layer buffer barrels (7).
8. The head restraint for ophthalmic examinations according to claim 1, characterized in that: the track curve equation of the chute (21) is Archimedes spiral.
9. The head restraint for ophthalmic examinations according to claim 1, characterized in that: the track curve of the sliding groove (21) is a curve of a chord which does not pass through the center of the circle on the turntable (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210993242.XA CN115316932B (en) | 2022-08-18 | 2022-08-18 | A head fixing device for ophthalmic examination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210993242.XA CN115316932B (en) | 2022-08-18 | 2022-08-18 | A head fixing device for ophthalmic examination |
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| Publication Number | Publication Date |
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| CN115316932A CN115316932A (en) | 2022-11-11 |
| CN115316932B true CN115316932B (en) | 2024-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210993242.XA Active CN115316932B (en) | 2022-08-18 | 2022-08-18 | A head fixing device for ophthalmic examination |
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| Country | Link |
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| CN (1) | CN115316932B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112089396A (en) * | 2020-10-15 | 2020-12-18 | 李晶艳 | Triple prism fixing frame for ophthalmic oblique amblyopia examination |
| CN113786162A (en) * | 2021-08-16 | 2021-12-14 | 许凤如 | Head fixing frame for ophthalmologic diagnosis |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102296597B1 (en) * | 2020-04-27 | 2021-09-01 | 박성걸 | non-human primate head fixation device |
| CN214909601U (en) * | 2021-06-02 | 2021-11-30 | 张敏 | Fixing device is used in neurosurgery severe patient's nursing |
| CN113854954A (en) * | 2021-11-17 | 2021-12-31 | 尹妮 | Ophthalmic examination system |
| CN113995371B (en) * | 2021-11-17 | 2022-06-28 | 濮阳市安阳地区医院 | Auxiliary support rack for ophthalmologic examination |
| CN114748030A (en) * | 2022-05-07 | 2022-07-15 | 董艳敏 | Adjustable inspection table convenient to use and suitable for ophthalmology department |
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2022
- 2022-08-18 CN CN202210993242.XA patent/CN115316932B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112089396A (en) * | 2020-10-15 | 2020-12-18 | 李晶艳 | Triple prism fixing frame for ophthalmic oblique amblyopia examination |
| CN113786162A (en) * | 2021-08-16 | 2021-12-14 | 许凤如 | Head fixing frame for ophthalmologic diagnosis |
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| Publication number | Publication date |
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| CN115316932A (en) | 2022-11-11 |
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