CN108403226B

CN108403226B - Dental extraction chair convenient for doctor to sit

Info

Publication number: CN108403226B
Application number: CN201810375358.0A
Authority: CN
Inventors: 杨倩倩; 马强强
Original assignee: Huaibei Rujia Medical Technology Co ltd
Current assignee: Guangdong Jinme Medical Technology Co ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2020-10-16
Anticipated expiration: 2038-04-24
Also published as: CN108403226A

Abstract

The invention belongs to the field of dentistry, and particularly relates to a dental extraction chair convenient for a doctor to sit, which comprises a bottom plate, wherein the bottom plate is in a disc shape, a sucking disc and a telescopic universal wheel are arranged below the base, the sucking disc is used for fixing the bottom plate on the ground, and the telescopic universal wheel is convenient for the whole dental extraction chair to move; the supporting rod is arranged above the bottom plate; the base is arranged at the upper end of the supporting rod; the handrail module is arranged on the base and used for holding the hands of the patient and measuring the pain value; the chair back is hinged on the right side of the base; the clamping module is arranged at the upper end of the chair back and is used for clamping the head of a patient to avoid the head of the patient from moving; the lighting module is arranged on the bottom plate and used for providing lighting; a second seat is mounted on the floor for seating a doctor. The invention is mainly used for tooth extraction of a dental patient, so that the tooth extraction is convenient, the pain of the patient is relieved, the comfort is increased, a doctor can extract the tooth conveniently, and the efficiency is improved.

Description

Dental extraction chair convenient for doctor to sit

Technical Field

The invention belongs to the field of dental medical treatment, and particularly relates to a dental extraction chair convenient for a doctor to sit.

Background

The dental chair comprises: it is mainly used for oral surgery and examination and treatment of oral diseases. At present, the main structure of the most adopted electric dental chair is divided into 8 parts, the whole dental chair is fixed on the ground by a bottom plate, the bottom plate is connected with the upper part of the dental chair by a bracket, the action of the dental chair is controlled by a control switch on a chair back, and the working principle of the electric dental chair is that the control switch starts a motor to operate and drives a transmission mechanism to work, so that the corresponding parts of the dental chair move. According to the treatment requirement, the dental chair can finish the actions of ascending, descending, bending, facing up, resetting and the like by operating the control switch buttons.

When a doctor pulls out teeth for a patient in the existing hospital, the doctor often walks around, the working efficiency is reduced, the patient cannot be operated in time, and the pain is brought to the patient. Therefore, the dental extraction chair which can provide illumination, can extract teeth conveniently and quickly, is time-saving and labor-saving, is safe and comfortable for doctors, and can more comfortably reduce the pain of patients is urgently needed to be researched and developed.

Disclosure of Invention

In order to make up the defects of the prior art, the invention provides the dental extraction chair convenient for a doctor to sit.

The technical scheme adopted by the invention for solving the technical problems is as follows: the dental extraction chair convenient for a doctor to sit provided by the invention comprises the following components in use:

firstly, carrying out oral disinfection and anaesthesia treatment on a patient;

step two, the patient is seated on the tooth extraction chair, the chair position is adjusted, the light source is aligned, the position of the patient is comfortable, the operation visual field is exposed, and the operation is convenient;

step three, preparing a tooth extraction instrument: the tooth extraction forceps are different in types and are suitable for different shapes and parts of teeth, and tooth extraction is selected according to the extracted teeth;

step four, separating the gingiva: inserting a gum separator from the gingival sulcus to separate gum tissues attached around the tooth stiffness so as to prevent the gum from tearing when the tooth is extracted; straightening and loosening the dental root: the elevator is inserted between the tooth root and the alveolar bone, the groove of the elevator faces to the tooth root surface, the left hand protects the adjacent teeth, the right hand holds the elevator, and the elevator gradually loosens the teeth from the middle part by using the alveolar bone as a fulcrum and utilizing leverage and rotation force; removing the affected teeth: accurately placing the forceps beak on the labial lingual side or the bucco-lingual side of the affected tooth, slowly shaking the forceps beak and the long axis direction of the tooth, and pulling out the forceps beak outwards with force along with the increase of the looseness of the tooth;

after tooth extraction, scraping off the fleshy dental tissue and foreign bodies in the alveolar fossa by using a curette, scratching the wound surface to enable the oozing blood to fill the alveolar fossa, then pressing the buccolingual gingiva by using fingers to reset the alveolar fossa, and finally covering the wound by using a sterilized sand strip or a cotton roll;

the tooth extraction chair in the second step comprises a bottom plate, a support rod, a base, a handrail module, a chair back, a clamping module, a lighting module and a second chair, wherein the bottom plate is disc-shaped, a sucker and a telescopic universal wheel are arranged below the base, the sucker is used for fixing the bottom plate on the ground, and the telescopic universal wheel is convenient for the whole tooth extraction chair to move; the supporting rod is arranged above the bottom plate; the base is arranged at the upper end of the support rod; the handrail module is arranged on the base and used for holding the hands of a patient and measuring pain values; the chair back is hinged to the right side of the base; the clamping module is arranged at the upper end of the chair back and is used for clamping the head of a patient to avoid the head of the patient from moving; the lighting module is arranged on the bottom plate and used for providing lighting; the second seat is arranged on the bottom plate and is used for a doctor to sit.

The base comprises a water filling bag, a spring and a heating plate, the water filling bag is positioned above the base, the upper surface of the water filling bag is provided with a hemispherical bulge to increase friction, and the water filling bag is used for filling water; the spring is positioned in the water filling bag, one end of the spring is connected with the base, and the other end of the spring is connected with the water filling bag; the hot plate install the lower part at the spring, seted up the through-hole on the hot plate, the through-hole is the spiral hole, when rivers passed from the spiral hole, the disturbance degree of increase rivers is favorable to the even heating of water. In winter, the heating plate in the water filling bag is in a heating state, water in the water filling bag is heated, a patient sits on the base, the spring moves downwards to drive the heating plate to move, water flow in the water filling bag is stirred, convection of the water is increased, and the water temperature in the water filling bag is uniform.

The armrest module comprises an armrest, an air bag and a pain numerical instrument, and the armrest is arranged on the base; the air bag is wrapped on the handrail; the pain numerical instrument is positioned in the air bag and converts the pressure applied to the pain numerical instrument into a pain numerical value and displays the value. When a doctor pulls out teeth for a patient, pain is inevitably brought to the patient, when the patient feels pain, the patient can hold the handrail tightly without freedom, the pain numerical instrument in the air bag converts the pressure into a pain numerical value, and when the doctor sees that the numerical value is rapidly increased, the force for pulling out the teeth is reduced, and the pain of the patient is reduced.

The chair back is divided into a first chair back and a second chair back which are two parts, and the first chair back is hinged to the second chair back; the second chair back is arranged on the base, a bulge is arranged on the left surface of the second chair back, the second chair back comprises a micro motor, a cam, a screw, a vertical plate, a round ball and a second spring, and the second chair back is provided with a hollow cavity; the micro motor is arranged in a hollow cavity in the second chair back; the cam is positioned in the hollow cavity of the second chair back, and the cam is arranged on the micro motor; the second chair back is provided with a spiral hole, and a screw penetrates through the spiral hole of the second chair back; the vertical plate is arranged on the right side of the screw, the screw and the vertical plate are rotatably arranged, and the vertical plate and the cam are in mutual contact; the round ball is fixedly arranged on the left side of the screw and is positioned in the second bulge of the chair back; one end of the second spring is fixedly connected with the vertical plate, and the other end of the second spring is connected with the inner wall of the hollow cavity of the second chair back. The first chair back is hinged to the second chair back and can rotate to facilitate a doctor to observe a patient, when the patient leans against the second chair back, the doctor opens the comfortable function of the second chair back, the micro motor is started, the micro motor drives the cam to rotate, the cam enables the vertical plate to move left and right, the screw penetrates through the spiral hole of the second chair back, the ball rotates and moves left and right, the back of the patient is massaged, and on the one hand, the tight mood of the patient is relieved. On the other hand, the pain of the patient is relieved.

The clamping module comprises a clamping plate, a sliding block, a spring III, a clamping block and sweat absorbing sponge, the clamping plate is hinged to the chair back I, and a groove is formed in the clamping plate; the sliding block is positioned in the groove; the third spring is fixedly connected with the sliding block; the clamping block is fixedly connected with the other end of the spring III; the sweat-absorbing sponge is fixed on the clamping block. The head of the patient is clamped by the clamping plate, so that the phenomenon that the patient moves randomly to hinder tooth extraction work of a doctor is avoided, and sweat at the clamping position can be absorbed by the sweat absorbing sponge; the slider is detachable, and intercommunication clamp splice and sweat-absorbing sponge are pulled down, make things convenient for medical personnel to the washing of clamping module.

The clamping blocks are connected with each other through rubber blocks, and the rubber blocks are provided with hollow cavities; the sweat-absorbing sponge in be equipped with the hose, seted up the through-hole on the hose, the one end of hose is located the hollow cavity of rubber piece, the hose is arranged in leading-in hollow cavity to the rubber piece of sweat in the sweat-absorbing sponge. When the sweat absorption sponge absorbs more sweat, the hose can introduce the sweat in the sweat absorption sponge into the hollow cavity of the rubber block.

The lighting module comprises an incandescent lamp and a lamp holder, and the lamp holder is arranged on the bottom plate; the incandescent lamp is arranged on the lamp holder. The lamp bracket is adjusted, the incandescent lamp is turned on, and the doctor can conveniently check the affected part of the patient.

The second seat comprises a first telescopic rod, a second bottom plate and a seat plate, wherein the bottom plate is provided with a circle of annular groove and is also provided with a turntable; the first telescopic rod is positioned in the groove of the first bottom plate, and one end of the first telescopic rod is fixedly connected with the rotary table; the second bottom plate is connected with the other end of the first telescopic rod; the second telescopic rod is arranged on the second bottom plate; the seat board is arranged on the second telescopic rod. The first telescopic rod is adjusted and the first telescopic rod is rotated, so that a doctor can pull out teeth of a patient, adjust the second telescopic rod, further enable the seat plate to be at a proper height, and facilitate tooth pulling work of the doctor.

The invention has the beneficial effects that:

1. the dental extraction chair convenient for a doctor to sit has the advantages of being convenient to operate, saving time and labor during extraction, greatly improving working efficiency, fully considering discomfort of a patient when the patient looks sick, and being beneficial to extraction of the doctor, reducing pain of the patient and bringing comfort to the patient due to the fact that the chair back, the handrail module and the clamping module are mutually matched.

2. The chair back can be used for leaning of a patient, can massage the back of the patient, attracts the attention of the patient, is not too tense for the patient, is sensitive to pain, is beneficial to tooth extraction progress of a doctor, and improves tooth extraction efficiency.

3. The clamping module provided by the invention has the advantages that the clamping plate, the clamping block, the sliding block and the sweat absorbing sponge are matched with each other, the head of a patient is fixed by the clamping plate, the phenomenon that the head of the patient moves disorderly to influence tooth extraction of a doctor is avoided, the working difficulty of the doctor is increased, the sliding block, the clamping block and the sweat absorbing sponge can be disassembled to facilitate cleaning, in addition, a hose in the sweat absorbing sponge can introduce sweat in the sweat absorbing sponge into the rubber block, and excessive sweat in the sweat absorbing sponge is avoided.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a flow chart of a method of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic view of the construction of the lighting module of the present invention;

FIG. 4 is a schematic view of the construction of the chair back of the present invention;

FIG. 5 is a schematic view of a clamping module according to the present invention;

FIG. 6 is an enlarged view taken at A of FIG. 5 in accordance with the present invention;

in the figure: the seat comprises a bottom plate 1, a support rod 2, a base 3, a water filling bag 31, a spring 32, a heating plate 33, an armrest module 4, an armrest 41, an air bag 42, a pain value meter 43, a chair back 5, a chair back first 51, a chair back second 52, a cam 53, a screw 54, a vertical plate 55, a round ball 56, a spring second 57, a clamping module 6, a clamping plate 61, a sliding block 62, a spring third 63, a clamping block 64, a sweat absorbing sponge 65, a rubber block 66, a hose 67, a lighting module 7, an incandescent lamp 71, a lamp holder 72, a second seat 8, a first telescopic rod 81, a second telescopic rod 82, a bottom plate second 83, a seat plate 84, a sucker 9, a telescopic universal wheel 10 and a.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, the technical solution adopted by the present invention to solve the technical problem is as follows: the dental extraction chair convenient for a doctor to sit provided by the invention comprises the following components in use:

firstly, carrying out oral disinfection and anaesthesia treatment on a patient;

the tooth extraction chair in the second step comprises a bottom plate 1, a support rod 2, a base 3, an armrest module 4, a chair back 5, a clamping module 6, a lighting module 7 and a second seat 8, wherein the bottom plate 1 is disc-shaped, a sucking disc 9 and a telescopic universal wheel 10 are arranged below the base 3, the sucking disc 9 is used for fixing the bottom plate 1 on the ground, and the telescopic universal wheel 10 is convenient for the tooth extraction chair to integrally move; the supporting rod 2 is arranged above the bottom plate 1; the base 3 is arranged at the upper end of the supporting rod 2; the handrail module 4 is arranged on the base 3, and the handrail module 4 is used for providing the hands for the patient and measuring the pain value; the chair back 5 is hinged on the right side of the base 3; the clamping module 6 is arranged at the upper end of the chair back 5, and the clamping module 6 is used for clamping the head of a patient to avoid the head of the patient from moving; the lighting module 7 is arranged on the bottom plate 1, and the lighting module 7 is used for providing lighting; the second seat 8 is mounted on the floor 1, and the second seat 8 is used for a doctor to sit on.

As an embodiment of the present invention, the base 3 includes a water filling bag 31, a spring 32 and a heating plate 33, the water filling bag 31 is located above the base 3, the upper surface of the water filling bag 31 is provided with a hemispherical protrusion to increase friction, and the water filling bag 31 is used for filling water; the spring 32 is positioned in the water filling bag 31, one end of the spring 32 is connected with the base 3, and the other end of the spring 32 is connected with the water filling bag 31; the lower part at spring 32 is installed to hot plate 33, has seted up the through-hole on the hot plate 33, the through-hole is the spiral hole, when rivers passed from the spiral hole, the disturbance degree of increase rivers is favorable to the even heating of water. In winter, the heating plate 33 inside the water filling bag 31 is in a heating state to heat the water in the water filling bag 31, the patient sits on the base 3, the spring 32 moves downwards to drive the heating plate 33 to move, the water flow inside the water filling bag is stirred, the convection of the water is increased, and the water temperature in the water filling bag 31 is uniform.

As an embodiment of the present invention, the armrest module 4 includes an armrest 41, an airbag 42, and a pain value meter 43, wherein the armrest 41 is mounted on the base 3; the air bag 42 is wrapped on the handrail 41; the pain value meter 43 is located inside the air bag 42, and the pain value meter 43 converts the pressure applied to the pain value into a pain value and displays the pain value. When a doctor extracts teeth from a patient, the doctor inevitably brings pain to the patient, when the patient feels pain, the patient can tightly hold the handrail 41 in an unfettered manner, the pain numerical instrument 43 in the air bag 42 converts the pressure into a pain numerical value, and when the doctor sees that the numerical value is rapidly increased, the tooth extraction strength is reduced, and the pain of the patient is reduced.

As an embodiment of the invention, the chair back 5 is divided into a first chair back 51 and a second chair back 52, wherein the first chair back 51 is hinged on the second chair back 52; the second chair back 52 is arranged on the base 3, a bulge is arranged on the left surface of the second chair back 52, the second chair back 52 comprises a micro motor, a cam 53, a screw 54, a vertical plate 55, a round ball 56 and a second spring 57, and the second chair back 52 is provided with a hollow cavity; the micro motor is arranged in a hollow cavity in the second chair back 52; the cam 53 is positioned in the hollow cavity of the second chair back 52, and the cam 53 is arranged on the micro motor; a spiral hole is formed in the second chair back 52, and a screw 54 penetrates through the spiral hole of the second chair back 52; the vertical plate 55 is arranged on the right side of the screw 54, the screw 54 and the vertical plate 55 are rotatably arranged, and the vertical plate 55 and the cam 53 are contacted with each other; the round ball 56 is fixedly arranged at the left side of the screw 54, and the round ball 56 is positioned in the bulge of the second chair back 52; one end of the second spring 57 is fixedly connected with the vertical plate 55, and the other end of the second spring 57 is connected with the inner wall of the hollow cavity of the second chair back 52. The first chair back 51 is hinged to the second chair back 52 and can rotate to facilitate a doctor to observe a patient, when the patient leans against the second chair back 52, the doctor starts the comfort function of the second chair back 52, the micro motor is started, the micro motor drives the cam 53 to rotate, the cam 53 enables the vertical plate 55 to move left and right, the screw 54 penetrates through the spiral hole of the second chair back 52 to enable the ball 56 to rotate and move left and right, the back of the patient is massaged, and on one hand, the tight mood of the patient is relieved. On the other hand, the pain of the patient is relieved.

As an embodiment of the invention, the clamping module 6 comprises a clamping plate 61, a sliding block 62, a spring III 63, a clamping block 64 and a sweat absorbing sponge 65, wherein the clamping plate 61 is hinged on the chair back I51, and a groove is arranged on the clamping plate 61; the sliding block 62 is positioned in the groove; the third spring 63 is fixedly connected with the sliding block 62; the clamping block 64 is fixedly connected with the other end of the spring III 63; the sweat absorbing sponge 65 is fixed on the clamping block 64. The head of the patient is clamped by the clamping plate 61, so that the phenomenon that the patient moves randomly to hinder the tooth extraction work of a doctor is avoided, and sweat at the clamping position can be absorbed by the sweat absorbing sponge 65; the slide block 62 is detachable, and the connecting clamping block 64 and the sweat absorbing sponge 65 are detached, so that the clamping module 6 can be conveniently cleaned by medical staff.

As an embodiment of the invention, the clamping blocks 64 are connected with the clamping blocks 64 through rubber blocks 66, and the rubber blocks 66 are provided with hollow chambers; a hose 67 is arranged in the sweat absorbing sponge 65, a through hole is formed in the hose 67, one end of the hose 67 is located in the hollow cavity of the rubber block 66, and the hose 67 is used for guiding sweat in the sweat absorbing sponge 65 into the hollow cavity of the rubber block 66. When the sweat absorbing sponge 65 absorbs sweat more, the hose 67 may introduce sweat from the sweat absorbing sponge 65 into the hollow cavity of the rubber block 66.

As an embodiment of the present invention, the lighting module 7 includes an incandescent lamp 71 and a lamp holder 72, and the lamp holder 72 is mounted on the base plate 1; the incandescent lamp 71 is mounted on a lamp holder 72. The lamp holder 72 is adjusted, and the incandescent lamp 71 is turned on, so that the affected part of the patient can be conveniently checked by a doctor.

As an embodiment of the present invention, the second seat 8 includes a first telescopic rod 81, a second telescopic rod 82, a second bottom plate 83 and a seat plate 84, the bottom plate 1 is provided with a ring of annular grooves, and the bottom plate 1 is further provided with a rotating disc 11; the first telescopic rod 81 is positioned in the groove of the first bottom plate 1, and one end of the first telescopic rod 81 is fixedly connected with the turntable 11; the second bottom plate 83 is connected with the other end of the first telescopic rod 81; the second telescopic rod 82 is arranged on the second bottom plate 83; the seat plate 84 is arranged on the second telescopic rod 82. Adjust telescopic link one 81 and rotate telescopic link one 81, make the doctor can 360 degrees pull out the tooth to patient, adjust telescopic link two 82, and then make bedplate 84 be in a suitable height, make things convenient for the doctor to pull out the tooth work.

The specific use flow is as follows:

when the chair is used, a patient sits on the tooth pulling chair, the angle of the chair back 5 is adjusted, the patient is in a comfortable state, a doctor starts the comfortable function of the chair back 5, the micro motor is started, the micro motor drives the cam 53 to rotate, the cam 53 enables the vertical plate 55 to move left and right, the screw 54 penetrates through the spiral hole of the chair back 52, the ball 56 rotates and moves left and right, and the back of the patient is massaged, so that the tight mood of the patient is relieved on one hand, and the pain feeling of the patient is relieved on the other hand; a doctor sits on the second seat 8, adjusts the length of the first telescopic rod 81 and enables the first telescopic rod 81 to rotate around the rotary table 11, so that the doctor can extract teeth of a patient in 360 degrees, adjusts the second telescopic rod 82, and further enables the seat plate 84 to be at a proper height, and the doctor can conveniently extract the teeth; the lamp holder 72 is adjusted, the incandescent lamp 71 is turned on, and the affected part of the patient can be conveniently checked by a doctor; the head of the patient is clamped by the clamping plate 61, so that the phenomenon that the patient moves randomly to hinder the tooth extraction work of a doctor is avoided, and sweat at the clamping position can be absorbed by the sweat absorbing sponge 65; the slide block 62 is detachable, the connecting clamping block 64 and the sweat absorbing sponge 65 are detached, so that the clamping module 6 can be conveniently cleaned by medical personnel, and when the sweat absorbing sponge 65 absorbs more sweat, the hose 67 can introduce the sweat in the sweat absorbing sponge 65 into the hollow cavity of the rubber block 66; when a doctor extracts teeth from a patient, the doctor inevitably brings pain to the patient, when the patient feels pain, the patient can tightly hold the handrail 41 in an unfettered manner, the pain numerical instrument 43 in the air bag 42 converts the pressure into a pain numerical value, and when the doctor sees that the numerical value is rapidly increased, the tooth extraction strength is reduced, and the pain of the patient is reduced.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a dentistry pulls out dental chair convenient to doctor sits which characterized in that: the tooth extraction chair comprises a bottom plate (1), a support rod (2), a base (3), a handrail module (4), a chair back (5), a clamping module (6), a lighting module (7) and a second chair (8), wherein the bottom plate (1) is disc-shaped, a sucking disc (9) and a telescopic universal wheel (10) are arranged below the base (3), the sucking disc (9) is used for fixing the bottom plate (1) on the ground, and the telescopic universal wheel (10) is convenient for the whole tooth extraction chair to move; the supporting rod (2) is arranged above the bottom plate (1); the base (3) is arranged at the upper end of the support rod (2); the handrail module (4) is arranged on the base (3), and the handrail module (4) is used for holding the hands of a patient and measuring pain values; the chair back (5) is hinged to the right side of the base (3); the clamping module (6) is arranged at the upper end of the chair back (5), and the clamping module (6) is used for clamping the head of a patient to avoid the head of the patient from moving; the lighting module (7) is arranged on the bottom plate (1), and the lighting module (7) is used for providing lighting; the second seat (8) is arranged on the bottom plate (1), and the second seat (8) is used for a doctor to sit;

the base (3) comprises a water filling bag (31), a spring (32) and a heating plate (33), the water filling bag (31) is positioned above the base (3), the upper surface of the water filling bag (31) is provided with a hemispherical bulge to increase friction, and the water filling bag (31) is used for filling water; the spring (32) is positioned in the water filling bag (31), one end of the spring (32) is connected with the base (3), and the other end of the spring (32) is connected with the water filling bag (31); the heating plate (33) is arranged at the lower part of the spring (32), and a through hole is formed in the heating plate (33) and is a spiral hole; when water flows through the spiral hole, the disturbance degree of the water flow is increased, and the uniform heating of water is facilitated; in winter, the heating plate (33) in the water filling bag (31) is in a heating state, water in the water filling bag (31) is heated, a patient sits on the base (3), the spring (32) moves downwards to drive the heating plate (33) to move, water flow in the water filling bag is stirred, convection of the water is increased, and the temperature of the water in the water filling bag (31) is uniform;

the armrest module (4) comprises an armrest (41), an air bag (42) and a pain numerical instrument (43), wherein the armrest (41) is arranged on the base (3); the air bag (42) is wrapped on the handrail (41); the pain numerical instrument (43) is positioned inside the air bag (42), and the pain numerical instrument (43) is used for converting the received pressure into a pain numerical value and displaying the value;

the clamping module (6) comprises a clamping plate (61), a sliding block (62), a spring III (63), a clamping block (64) and sweat absorbing sponge (65), the clamping plate (61) is hinged to the chair back I (51), and a groove is formed in the clamping plate (61); the sliding block (62) is positioned in the groove; the spring III (63) is fixedly connected with the sliding block (62); the clamping block (64) is fixedly connected with the other end of the spring III (63); the sweat absorbing sponge (65) is fixed on the clamping block (64);

the clamping blocks (64) are connected with each other through rubber blocks (66), and the rubber blocks (66) are provided with hollow chambers; be equipped with hose (67) in sweat-absorbing sponge (65), seted up the through-hole on hose (67), the one end of hose (67) is located the hollow cavity of rubber block (66), hose (67) are arranged in leading-in the hollow cavity of rubber block (66) of sweat-absorbing sponge (65) sweat.

2. A dental extraction chair for a doctor to sit conveniently as claimed in claim 1, wherein: the chair back (5) is divided into a first chair back (51) and a second chair back (52), and the first chair back (51) is hinged to the second chair back (52); the second chair back (52) is installed on the base (3), a bulge is arranged on the left surface of the second chair back (52), the second chair back (52) comprises a micro motor, a cam (53), a screw (54), a vertical plate (55), a round ball (56) and a second spring (57), and a hollow cavity is formed in the second chair back (52); the micro motor is arranged in a hollow cavity in the chair back II (52); the cam (53) is positioned in a hollow cavity of the chair back II (52), and the cam (53) is arranged on the micro motor; a spiral hole is formed in the second chair back (52), and a screw (54) penetrates through the spiral hole of the second chair back (52); the vertical plate (55) is arranged on the right side of the screw (54), the screw (54) and the vertical plate (55) are rotatably arranged, and the vertical plate (55) is contacted with the cam (53); the round ball (56) is fixedly arranged at the left side of the screw (54), and the round ball (56) is positioned in the bulge of the second chair back (52); one end of the second spring (57) is fixedly connected with the vertical plate (55), and the other end of the second spring (57) is connected with the inner wall of the hollow cavity of the second chair back (52).

3. A dental extraction chair for a doctor to sit conveniently as claimed in claim 1, wherein: the lighting module (7) comprises an incandescent lamp (71) and a lamp holder (72), and the lamp holder (72) is arranged on the bottom plate (1); the incandescent lamp (71) is arranged on the lamp holder (72).

4. A dental extraction chair for a doctor to sit conveniently as claimed in claim 1, wherein: the second seat (8) comprises a first telescopic rod (81), a second telescopic rod (82), a second bottom plate (83) and a seat plate (84), the bottom plate (1) is provided with a circle of annular grooves, and the bottom plate (1) is further provided with a turntable (11); the first telescopic rod (81) is positioned in the groove of the first bottom plate (1), and one end of the first telescopic rod (81) is fixedly connected with the rotary table (11); the second bottom plate (83) is connected with the other end of the first telescopic rod (81); the second telescopic rod (82) is arranged on the second bottom plate (83); the seat plate (84) is arranged on the second telescopic rod (82).