A method of using an electroencephalogram examination chair

Abstract

The application relates to the technical field of electroencephalogram detection medical devices, and discloses a use method of an electroencephalogram examination chair.The method is characterized in that after the chin is supported, the support structure is bound to the head of a patient through the design of a binding belt, a hook surface magic tape and a wool surface magic tape, and is connected through a horizontal bending adjusting assembly; through a plurality of folding sub-rods which can be turned over in the horizontal bending adjusting assembly, the horizontal position of the support structure can be automatically changed along with the movement of the patient, the support position is changed, the change of the horizontal position of the support structure during examination is facilitated, different support requirements are met, the adjustment is realized without manual operation, and the adjustment is realized only through the movement of the patient, so that the use is convenient; the electromagnet is powered to generate magnetic force driving, rapid braking is realized, and the adjustment position is fixed.

Description

TECHNICAL FIELD

[0001] The use method of an electroencephalogram examination chair relates to the technical field of electroencephalogram detection medical instruments. BACKGROUND

[0002] Electroencephalogram is a common examination method in neurology, and the examination method can be divided into static and dynamic types in clinical practice, and is mainly used to examine cerebrovascular and neurological diseases such as epilepsy, brain tumors, brain trauma, etc. In addition, it also has an auxiliary diagnostic effect on mental diseases, such as can be used for electroencephalogram analysis of depression children. When performing electroencephalogram examination, patients often use examination chairs to provide auxiliary examination.

[0003] In the early stage, there is no special chair for electroencephalogram detection, so patients sit on ordinary chairs. The ordinary chair cannot well assist the doctor in the corresponding examination, which easily causes the problem of poor patient comfort. Therefore, the utility model patent 'a new electroencephalogram examination chair' with application number 202121120380.4 gives a solution, which is recorded as follows: including seat body, waist support pad, head support device, support, handle, chest support device and lower jaw support device, wherein: the waist support pad is arranged in the middle of the surface of the seat body backrest; the head support device is arranged in the middle of the top end of the seat body backrest through the fixing plate. The head support device, chest support device and lower jaw support device can assist the doctor in the corresponding examination, provide better comfort for the patient, better fix the patient, reduce the workload of the patient's family members and medical staff, and are convenient for market promotion and application.

[0004] Through analysis of the above technical documents, it can be known that although it can provide support for the patient's head and reduce the fatigue of the patient during the examination process, it also has the following disadvantages: after supporting the patient's head, it is not easy to adjust the support horizontal position, and it is not easy to meet the head support function of the patient in different sitting positions; that is, it is not easy to automatically adjust the support position when the patient changes the sitting position during the examination process of keeping the fixed sitting position for a long time. SUMMARY

[0005] In view of the above problems, the electroencephalogram examination chair is designed, after supporting the chin, the supporting structure is bound on the head of the patient through the design of the binding belt, the hook surface magic tape and the wool surface magic tape, and is connected through the horizontal bending adjusting assembly, the folding sub-rod in the horizontal bending adjusting assembly is reversibly rotated, moves with the patient, and automatically changes the horizontal position front and back and left and right, changes the supporting position, facilitates the change of the horizontal position during examination, meets different supporting requirements, and simultaneously the adjustment does not need to be manually realized, and is only realized by the movement of the patient itself, so that the use is convenient;The electromagnet is powered, magnetic force is generated, rapid braking is realized, and the adjusting position is fixed.

[0006] The purpose of the present application is achieved as follows:

[0007] A use method of the electroencephalogram examination chair, steps are as follows:

[0008] First, the structure in front of the back pad is opened, the front block is cancelled, the patient is prevented from sitting, the hasp is unlocked, then two chin supporting seats are held by two hands respectively, the two chin supporting seats are separated and opened by pulling the two chin supporting seats, so that the plug and the socket are separated, a space is generated between the two chin supporting seats, the telescopic plate is telescoped, the chin supporting seat is pulled open, the movable plate moves with the chin supporting seat during pulling and moving, so that the plug and the socket are relatively moved, the amount of the plug inserted into the socket is changed, telescoping is realized, the first spiral spring is compressed, the compression elastic force of reset is generated, after the space is generated between the two chin supporting seats, the rotating hinge design of the fixed seat and the turnover seat is used, the turnover seat, the telescopic plate and the chin supporting seat are turned together, specifically, the chin supporting seat is turned downward by 90°, and the horizontal state is turned into the vertical state, so that the block is cancelled.

[0009] Then the patient sits on the seat pad, after sitting, the chin supporting seat is reset through the turnover operation, and force needs to be applied during turnover to make the telescopic plate in the contraction state, after the turnover into the horizontal state, the force is slowly released in the transverse direction, the two chin supporting seats are close to each other through the elastic force of the first spiral spring, until the plug is inserted into the socket, then the hasp is locked, so that the structure for supporting the chin of the patient is located in front of the patient.

[0010] The horizontal height is adjusted through the lifting adjusting assembly, which is suitable for the support needs of different heights of patients, when the height is adjusted, the two worms and the connecting shaft are rotated by rotating the adjusting knob, the two screws are synchronously rotated through the meshing transmission between the worm and the worm wheel, the screw thread between the screw and the nut is screwed, the vertical guiding effect of the guide block and the guide groove is matched, the vertical driving is realized, the height is adjusted, and the structure supporting the chin is adjusted to different horizontal heights.

[0011] After the height is adjusted, the initial state of the electromagnet is a power-off state, the structure state in the circular pipe, the inner ring of the circular ring seat is not extruded and is subjected to friction braking, the two adjacent folded sub-rods are relatively rotated, the horizontal bending adjusting assembly is formed by a plurality of folded sub-rods and is hinged, the position adjustment of the chin support seat in the horizontal plane is realized through the hinge turning of the plurality of segments, the soft pad on the chin support seat is moved below the chin of the patient, support contact is performed, then the chin support seat is fixed through the hook face magic tape and the wool face magic tape.

[0012] The chin support effect is provided through the above operation, long-term examination is avoided, the patient adjusts the sitting posture in the power-off state of the electromagnet, the sitting position is avoided, long-term sitting in the same position causes discomfort, and correspondingly, the head drives the chin support seat to move through binding, the folding sub-rod is hinged, and the support position is automatically adjusted.

[0013] After the support position is adjusted, the medical staff controls the electromagnet to be powered on through the control box; after the electromagnet is powered on, the iron ring is magnetically attracted, the iron ring and the circular table ring are lowered together, and the third spring is stretched, generating a reset elastic force; when the circular table ring is lowered, the upper and lower diameters thereof are designed to be different, and the circular ball end surface of the pressing column is provided with gradually thickened extrusion during the downward movement of the circular table ring, so that the pressing column is pressed onto the inner ring of the circular ring seat, and the second spiral spring is compressed, generating a reset elastic force; through extrusion, the friction is improved, the braking is realized, and the limiting after adjustment is completed.

[0014] When the position is adjusted again, the electromagnet is powered off, the circular table ring is driven to be reset upward through the elastic force of the third spiral spring, the pressing column is reset through the elastic force of the second spiral spring, the extrusion of the circular ring seat is cancelled, the braking is cancelled, and the patient continues to move and adjust the sitting position, and the chin support position is adjusted synchronously.

[0015] The use method of the above-mentioned electroencephalogram examination chair, the electroencephalogram examination chair comprises a seat and a seat frame.

[0016] The bottom of the chair seat is provided with a plurality of casters in an annular array, the top center of the chair seat is fixedly provided with a vertical gas spring, the top end of the gas spring is fixedly connected with the bottom center of the seat frame, and a seat cushion is fixedly laid on the top surface of the seat frame; the seat frame is fixedly provided with a connecting plate, the top of the connecting plate is fixedly provided with a back frame, and a back cushion is fixedly laid on the surface of the back frame;

[0017] The present application has the following advantages:

[0018] Firstly, the present application can provide support for the chin and head of a patient, reduce fatigue during examination, and adjust the horizontal height through the lifting adjustment assembly. By rotating the adjustment knob, the two worms and the connecting shaft are rotated together. The meshing transmission between the worm and the worm wheel enables the two screws to rotate synchronously. The screw threads between the screw and the nut are twisted, and the vertical guiding effect of the guide block and the guide groove is achieved. The vertical driving is achieved, and the height is adjusted. Therefore, the structure supporting the chin is adjusted to different horizontal heights, which is suitable for the support needs of patients at different heights.

[0019] Secondly, after providing support for the chin, the support structure can be tied to the head of the patient through the design of the binding belt, the hook-faced magic tape, and the fuzzy-faced magic tape. The horizontal bending adjustment assembly is connected. The folding sub-rod in the horizontal bending adjustment assembly can be flipped and rotated. It can move with the patient and automatically change the horizontal position left and right. The support position is changed to meet the change of the support position in the horizontal position during examination and meet different support needs. At the same time, the adjustment does not need to be manually realized. The adjustment is realized through the movement of the patient, which is convenient to use.

[0020] Thirdly, the present application has the design of quick locking and braking. After adjustment, the electromagnet is energized to quickly brake and brake after adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic diagram of the electroencephalogram examination chair.

[0022] Figure 2 It is a structure schematic diagram of the lifting adjustment assembly.

[0023] Figure 3 It is a structure schematic diagram of the chin support seat above and on both sides.

[0024] Figure 4 It is a structure schematic diagram of the inside of the chin support seat.

[0025] Figure 5 It is a structure schematic diagram of the inside of the guide groove.

[0026] Figure 6 Fig. 6 is a structural diagram of the outside of the two folding sub-rod connection state;

[0027] Figure 7 Fig. 7 is a structural diagram of the outside of the circular tube;

[0028] Figure 8 Fig. 8 is a structural diagram of the cross section of the two folding sub-rod connection state;

[0029] Figure 9 Fig. 9 is a structural diagram of the inside of the circular table ring;

[0030] Figure 10 Fig. 10 is a structural diagram of the distribution of the pressing column.

[0031] In the figure: 1, chair seat; 2, caster; 3, gas spring; 4, seat frame; 5, seat cushion; 6, connecting plate; 7, back frame; 8, back cushion; 9, fixed frame; 10, protective shell; 11, guide groove; 12, guide block; 13, adjusting knob; 14, folding sub-rod; 15, control box; 16, fixed seat; 17, overturning seat; 18, insertion strip; 19, movable plate; 20, chin support seat; 21, binding strap; 22, nut; 23, screw rod; 24, worm wheel; 25, worm; 26, connecting shaft; 27, hook-faced magic tape; 28, fuzzy-faced magic tape; 29, soft cushion; 30, hasp lock; 31, end groove; 32, end seat; 33, circular tube; 34, circular hole; 35, circular ring groove; 36, through hole; 37, guide groove; 38, first spiral spring; 39, pressing column; 40, second spiral spring; 41, circular ring seat; 42, guide rod; 43, circular table ring; 44, third spiral spring; 45, iron ring; 46, electromagnet; 47, guide hole; 48, recessed hole; 49, ball. DETAILED DESCRIPTION

[0032] The specific embodiment of the present application will be described in further detail below in combination with the accompanying drawings.

[0033] Method one

[0034] The following is a specific embodiment of the electroencephalogram examination chair of the present application.

[0035] The electroencephalogram examination chair under this specific embodiment, as shown in Figures 1-10 , includes a chair seat 1 and a seat frame 4.

[0036] The bottom of the seat 1 is provided with a plurality of casters 2 in an annular array, the top center of the seat 1 is fixedly provided with a vertical gas spring 3, the top end of the gas spring 3 is fixedly connected to the bottom center of the seat frame 4, and the top surface of the seat frame 4 is fixedly provided with a seat cushion 5; the seat frame 4 is fixedly provided with a connecting plate 6, the top of the connecting plate 6 is fixedly provided with a back frame 7, and the surface of the back frame 7 is fixedly provided with a back cushion 8;

[0037] The two side walls of the back frame 7 are fixedly provided with lifting adjustment assemblies, the lifting adjustment assemblies are connected with two horizontal bending adjustment assemblies, the horizontal bending adjustment assemblies are assembled by a plurality of folding sub-rod 14, adjacent two folding sub-rod 14 are hingedly connected, one fixing seat 16 is fixedly installed at the end of the two horizontal bending adjustment assemblies away from the lifting adjustment assemblies, one turnover seat 17 is hingedly installed on the two fixing seats 16, one telescopic plate is connected to the two turnover seats 17, one chin support seat 20 is fixedly installed at one end of the two telescopic plates, a groove is formed in the two chin support seats 20, a soft pad 29 for supporting the chin of the patient is fixedly and inlaidly installed in the groove, the top of the soft pad 29 is of a circular arc structure, the bottom of the two chin support seats 20 are connected by a buckle lock 30, and one binding belt 21 is fixedly connected to the two chin support seats 20.

[0038] When the patient sits on the seat cushion 5 and supports the chin position, the horizontal support position can be adjusted in front, back, left and right positions by rotating and bending the plurality of folding sub-rod 14, and further the lifting height is adjusted by the lifting adjustment assembly to meet the support requirements of different positions.

[0039] The two chin support seats 20 are respectively provided with an insertion block and an insertion hole, and the insertion block and the insertion hole are connected in clearance fit.

[0040] The back surface of the back frame 7 is fixedly provided with a control box 15, the control box 15 has a circuit board to provide a control circuit, an electromagnet 46 is connected to the control circuit, the control box 15 has a control switch on the shell, and an external power supply is used for control at the same time.

[0041] As Figure 2As shown, as a specific technical solution, the lifting and adjusting assembly includes a protective shell 10 and a connecting shaft 26. There are two protective shells 10, which are respectively fixedly installed on the two side walls of the back frame 7 via a fixing bracket 9. Both ends of the connecting shaft 26 are rotatably installed on the lower side walls of the two protective shells 10, and the end of the connecting shaft 26 extends into the interior of the protective shell 10. A worm gear 25 is fixedly connected to the end of the connecting shaft 26, and the worm gear 25 is rotatably installed at the lower interior of the protective shell 10. A vertical screw 23 is also rotatably installed inside the protective shell 10, and a fixed sleeve is fitted at the bottom end of the screw 23. A worm gear 24 is connected to the worm 25. A nut 22 is threaded onto the rod surface of the screw 23. A guide block 12 is fixedly connected to the nut 22. A guide groove 11 is vertically formed on the front of the protective shell 10. The guide groove 11 is slidably connected to the guide block 12. The end of the guide block 12 away from the nut 22 is fixedly connected to the folding sub-rod 14 at the rear end of the horizontal bending adjustment assembly. An adjustment knob 13 is fixedly connected to the end of the worm 25 at the left end of the connecting shaft 26. The adjustment knob 13 is rotatably mounted to the outer wall of the protective shell 10. The height position can be adjusted by rotating the adjustment knob 13.

[0042] like Figure 5 As shown, as a specific technical solution, the telescopic plate includes an insert 18, a movable plate 19, and a first helical spring 38. One end of the insert 18 is fixedly connected to one end of the flip seat 17. The movable plate 19 has a guide groove 37 at one end near the insert 18, and the other end of the movable plate 19 is fixedly connected to the chin support seat 20. The insert 18 and the guide groove 37 are connected with a clearance fit. Multiple first helical springs 38 are provided inside the guide groove 37. One end of the first helical spring 38 is fixedly connected to one end of the insert 18, and the other end of the first helical spring 38 is fixedly connected to the groove wall of the guide groove 37, so as to realize elastic telescopic movement and facilitate the adjustment of the position between the two chin support seats 20.

[0043] Further, one end of the folding sub-rod 14 is provided with an end slot 31, and a circular tube 33 is fixedly installed inside the end slot 31. The other end of the folding sub-rod 14 is fixedly installed with an end seat 32, and a circular hole 34 is formed in the end seat 32. Two adjacent folding sub-rods 14 are connected through the circular tube 33 and the circular hole 34, and the circular tube 33 and the circular hole 34 are connected in clearance fit. A circular ring groove 35 is formed in the outer tube wall of the circular tube 33, and a circular ring seat 41 is fixedly installed on the hole wall of the circular hole 34. The circular ring seat 41 and the circular ring groove 35 are connected in clearance fit. A plurality of through holes 36 in annular array are formed in the inner tube wall of the circular tube 33, and the through holes 36 are communicated with the circular ring groove 35. A pressing column 39 is connected in clearance fit with the through hole 36. One end of the pressing column 39 is in a hemispherical structure. A second spiral spring 40 is sleeved on the pressing column 39. One end of the second spiral spring 40 is fixedly connected with the column surface of the pressing column 39, and the other end of the second spiral spring 40 is fixedly connected with the inner tube wall of the circular tube 33. The end face of the pressing column 39 close to the circular ring seat 41 is in a circular arc surface structure. A circular table ring 43 is arranged inside the circular tube 33, and the circular table ring 43 is located above the middle part of the plurality of pressing columns 39. A guide hole 47 is formed in the middle part of the circular table ring 43. A guide rod 42 is connected in clearance fit with the guide hole 47. Both ends of the guide rod 42 are fixedly connected with the slot wall of the end slot 31. A plurality of concave holes 48 in uniform distribution are formed in the hole wall of the guide hole 47. A ball 49 is arranged in the concave hole 48, and the ball 49 is in contact with the rod surface of the guide rod 42. A third spiral spring 44 is arranged on the top of the circular table ring 43. The third spiral spring 44 is sleeved on the guide rod 42. The top end of the third spiral spring 44 is fixedly connected with the slot wall of the end slot 31, and the other end of the third spiral spring 44 is fixedly connected with the top of the circular table ring 43. An iron ring 45 is fixedly installed on the bottom of the circular table ring 43. A plurality of electromagnets 46 in annular array are arranged below the bottom of the iron ring 45, and the electromagnets 46 are fixedly installed on the slot wall of the end slot 31, for braking after position adjustment.

[0044] Mode two

[0045] The following is a specific embodiment of the use method of the electroencephalogram examination chair.

[0046] The use method of the electroencephalogram examination chair in the specific embodiment is as follows:

[0047] First, the structure in front of the back pad 8 is opened, the front block is cancelled, the patient is avoided to sit, the buckle lock 30 is unlocked, then the two chin support seats 20 are held by hands respectively, the two chin support seats 20 are separated and opened by pulling, so that the plug and the socket are separated, the distance between the two chin support seats 20 is generated, the telescopic plate is telescoped, the chin support seat 20 is pulled, the movable plate 19 moves with the chin support seat 20, so that the plug 18 and the guide groove 37 are relatively moved, the amount of the plug 18 inserted into the guide groove 37 is changed, the telescopic plate is telescoped, the first spiral spring 38 is compressed, the compression elastic force is generated, the distance between the two chin support seats 20 is generated, then the rotating hinge design of the fixed seat 16 and the turnover seat 17 is realized, the turnover seat 17, the telescopic plate and the chin support seat 20 are turned together, specifically, the turnover seat 17 is turned downward by 90°, the horizontal state is turned into the vertical state, so that the block is cancelled;

[0048] Then the patient sits on the seat pad 5, after sitting, the chin support seat 20 is reset by turning over, at the same time, the telescopic plate is in the contraction state, the horizontal state is turned over, the two chin support seats 20 are slowly relaxed in the transverse direction, the two chin support seats 20 are close to each other by the elastic force of the first spiral spring 38, until the plug is inserted into the socket, then the buckle lock 30 is locked, the structure for supporting the chin of the patient is located in front of the patient;

[0049] The horizontal height is adjusted by the lifting adjustment assembly, which is suitable for the support needs of patients with different heights, when the height is adjusted, the two worms 25 and the connecting shaft 26 are rotated by rotating the adjusting knob 13, the two screws 23 are synchronously rotated by the meshing transmission between the worm 25 and the worm wheel 24, the screw 23 and the nut 22 are screwed, the vertical guiding effect of the guide block 12 and the guide groove 11 is realized, the vertical driving is realized, the height is adjusted, so that the structure for supporting the chin is adjusted to different horizontal heights;

[0050] After adjusting the height, the initial state of the electromagnet 46 is the power-off state, the structure in the circular tube 33 is as shown in Figure 8 The inner ring of the ring seat 41 is not extruded and is subjected to friction braking, the two adjacent folding sub-rods 14 are relatively rotated, the horizontal bending adjustment assembly is composed of a plurality of folding sub-rods 14, the position of the chin support seat 20 is adjusted in the horizontal plane by the hinge turning of the plurality of segments, the soft pad 29 on the chin support seat 20 is moved below the chin of the patient, the chin of the patient is supported and contacted, then the head of the patient is wrapped by the bandage 21, the hook face magic tape 27 and the wool face magic tape 28 are adhered and fixed;

[0051] The chin support is provided by the above operation, avoiding long-term examination and causing the patient to be tired. After the support, the electromagnet 46 is not powered, and the patient adjusts the sitting posture and sitting position to avoid long-term sitting in the same position and causing discomfort. Correspondingly, after binding, the head drives the chin support seat 20 to move, and the folding sub-rod 14 is automatically adjusted and supported by the hinge effect.

[0052] After adjusting the support position, the medical staff controls the electromagnet 46 to be powered by the control box 15 to perform limit braking; after the electromagnet 46 is powered, the iron ring 45 is magnetically attracted, so that the iron ring 45 and the circular table ring 43 are lowered together, and the third spring is stretched to generate a reset elastic force. When the circular table ring 43 is lowered, its upper and lower different design provides a gradually thickened extrusion effect for the spherical end face of the pressure column 39 during the lowering process, so that the pressure column 39 is pressed to the inner ring of the circular ring seat 41, and the second spiral spring 40 is compressed to generate a reset elastic force. Through extrusion, the friction is improved to achieve braking and complete the limit of adjustment.

[0053] When adjusting the position again, the electromagnet 46 is de-energized, driven by the elastic force of the third spiral spring 44, so that the circular table ring 43 is reset upward, and the pressure column 39 is reset by the elastic force of the second spiral spring 40, so that the extrusion of the circular ring seat 41 is cancelled, and the braking is cancelled. The patient continues to move and adjust the sitting position, and the chin support position is adjusted synchronously.

[0054] It should be noted that the above is only a specific embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0055] It should be noted that the above is only a specific embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method of using an electroencephalogram examination chair, characterized by, The steps are as follows: First, open the structure in front of the back pad (8), cancel the front block, avoid affecting the patient sitting, by unzipping the buckle lock (30), then by holding two chin support seats (20) with both hands, by pulling two chin support seats (20), make two chin support seats (20) separate and open, so that the plug and the socket are separated, the distance between the two chin support seats (20) is generated, the telescopic plate is stretched and contracted, the chin support seat (20) is pulled open, the movable plate (19) moves with the chin support seat (20), so that the plug (18) and the guide groove (37) move relatively, the amount of the plug (18) inserted into the guide groove (37) is changed, and the telescopic plate is stretched and contracted, the first spiral spring (38) is compressed, and the compression elastic force is generated. After the distance between the two chin support seats (20) is generated, the fixed seat (16) and the turnover seat (17) are rotated and connected, the turnover is realized, the turnover seat (17), the telescopic plate and the chin support seat (20) are rotated together, and the horizontal state is turned into a vertical state, so that the block is cancelled; Then the patient sits on the seat cushion (5), after sitting, the chin support seat (20) is reset by turning over, and the telescopic plate is in the contracted state during turning over. After turning over into a horizontal state, slowly relax in the transverse direction, the two chin support seats (20) are close to each other under the action of the elastic force of the first spiral spring (38), until the plug is inserted into the socket, then lock the buckle lock (30), so that the structure of the chin support is located in front of the patient; After adjusting the height, the electromagnet (46) is in an initial state of power-off, the structure in the circular tube (33) is in a state of being pressed in the inner ring of the circular ring seat (41), the two adjacent folding sub-rods (14) rotate relative to each other, the horizontal bending adjustment assembly is composed of a plurality of folding sub-rods (14) connected by hinges, and the position of the chin support seat (20) is adjusted in the horizontal plane before and after and left and right, so that the soft pad (29) on the chin support seat (20) moves below the chin of the patient and supports and contacts the patient's chin. Then the patient's head is wrapped with the binding belt (21), and the hook-faced magic tape (27) and the fuzzy-faced magic tape (28) are adhered and fixed; After adjusting the support position, the medical staff controls the electromagnet (46) to be energized through the control box (15); after the electromagnet (46) is energized, the iron ring (45) is magnetically attracted, so that the iron ring (45) and the circular table ring (43) descend together, and the third spring is stretched, generating a reset elastic force. When the circular table ring (43) descends, the upper and lower parts of different designs provide a gradually increasing extrusion effect on the spherical end face of the pressure column (39), so that the pressure column (39) is pressed tightly on the inner ring of the circular ring seat (41), and the second spiral spring (40) is compressed, generating a reset elastic force. By extrusion, the friction is increased to achieve braking, and the limit after adjustment is completed. When the position is adjusted again, the electromagnet (46) is powered off, the circular ring (43) is driven to rise and reset by the elastic force of the third spiral spring (44), the pressure column (39) is reset by the elastic force of the second spiral spring (40), the extrusion circular ring seat (41) is cancelled, the braking is cancelled, and the patient continues to move to adjust the sitting position, and the adjustment of the chin support position is synchronized.

2. The method of using an electroencephalogram examination chair of claim 1, wherein, The electroencephalogram examination chair comprises a seat (1) and a seat frame (4); The bottom of the seat (1) is provided with a plurality of casters (2) in an annular array, and the top center of the seat (1) is fixedly provided with a vertical gas spring (3); the top end of the gas spring (3) is fixedly connected to the bottom center of the seat frame (4), and the top surface of the seat frame (4) is fixedly provided with a layer of seat cushion (5); the seat frame (4) is fixedly provided with a connecting plate (6), and the top of the connecting plate (6) is fixedly provided with a back frame (7); and a layer of back cushion (8) is fixedly provided on the surface of the back frame (7).

3. The method of using an electroencephalogram examination chair of claim 1, wherein, The horizontal height is adjusted by the lifting adjusting assembly, so as to adapt to the support requirements of patients at different heights; when the height is adjusted, the two worms (25) and the connecting shaft (26) are rotated by rotating the adjusting knob (13); the two screw rods (23) are synchronously rotated by the meshing transmission between the worm (25) and the worm wheel (24); the screw rod (23) and the nut (22) are screwed, and the vertical guiding effect of the guide block (12) and the guide groove (11) is achieved, so as to realize the vertical driving and the height adjustment, so that the structure supporting the chin is adjusted to different horizontal heights.

4. The method of using an electroencephalogram examination chair of claim 1, wherein, The chin support effect is provided by the above operation, so as to avoid the patient's fatigue caused by long-term examination; after the chin support, the patient adjusts the sitting position in the state that the electromagnet (46) is not powered on, so as to avoid the discomfort caused by long-term sitting at the same position, and the folding sub-rod (14) is automatically adjusted to the support position by the hinging effect.

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