CN108836595B - Chair capable of preventing spinal curvature - Google Patents

Chair capable of preventing spinal curvature Download PDF

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Publication number
CN108836595B
CN108836595B CN201810843298.0A CN201810843298A CN108836595B CN 108836595 B CN108836595 B CN 108836595B CN 201810843298 A CN201810843298 A CN 201810843298A CN 108836595 B CN108836595 B CN 108836595B
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CN
China
Prior art keywords
driving
buckle
fixedly connected
plate
gear
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CN201810843298.0A
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Chinese (zh)
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CN108836595A (en
Inventor
杨彬
黄俊卿
李琳
张亚坤
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Henan Hospital Traditional Chinese Medicine Second Affiliated Hospital of Henan University of Traditional Chinese Medicine TCM
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Henan Hospital Traditional Chinese Medicine Second Affiliated Hospital of Henan University of Traditional Chinese Medicine TCM
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Priority to CN201810843298.0A priority Critical patent/CN108836595B/en
Publication of CN108836595A publication Critical patent/CN108836595A/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F5/00Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/01Orthopaedic devices, e.g. splints, casts or braces
    • A61F5/0102Orthopaedic devices, e.g. splints, casts or braces specially adapted for correcting deformities of the limbs or for supporting them; Ortheses, e.g. with articulations
    • A61F5/0104Orthopaedic devices, e.g. splints, casts or braces specially adapted for correcting deformities of the limbs or for supporting them; Ortheses, e.g. with articulations without articulation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/02Chairs with means to adjust position of patient; Controls therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/10Parts, details or accessories
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H7/00Devices for suction-kneading massage; Devices for massaging the skin by rubbing or brushing not otherwise provided for
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/01Constructive details
    • A61H2201/0119Support for the device
    • A61H2201/0138Support for the device incorporated in furniture
    • A61H2201/0149Seat or chair
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/12Driving means
    • A61H2201/1207Driving means with electric or magnetic drive
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2205/00Devices for specific parts of the body
    • A61H2205/08Trunk
    • A61H2205/081Back

Abstract

The invention relates to a chair for preventing spinal curvature, which effectively solves the problems that the existing chair for preventing spinal curvature cannot prevent spinal lateral curvature, has poor prevention effect and does not have a massage function; the technical scheme for solving the problem comprises a chair main body and is characterized in that the main body is connected with an anti-lateral bending device in an up-and-down sliding manner, and the main body is connected with an anti-humpback device in a front-and-back sliding manner; the anti-side bending device comprises two vertical plates, the two vertical plates are connected with a first driving motor, the anti-humpback device comprises a semicircular guide rail, two arc-shaped retaining rings are connected to the semicircular guide rail, and the two arc-shaped retaining rings are connected with a second driving motor; the invention replaces the flexible binding band with the rigid arc-shaped buckle ring which can be adjusted back and forth, enhances the correction effect and can be adjusted at the same time, is additionally provided with the lateral bending prevention device to prevent the lateral bending of the spine caused by the long-time lateral bending of the body of a user, and is also additionally provided with the waist and back massage device to massage the long-sitting user to prevent other symptoms caused by the long-time fatigue of muscles.

Description

Chair capable of preventing spinal curvature
Technical Field
The invention relates to the technical field of spine prevention equipment, in particular to a chair for preventing spine bending.
Background
97% of middle-aged and elderly people in China have spine diseases, and in recent years, the spine disease trend is younger, in people under 40 years old, more than 40% of people have various diseases, and the incidence rate of scoliosis of children is more than 25%. The domestic spine diseases not only spread widely in middle-aged and elderly people, but also gradually spread to teenagers and children, and more people enter hospitals due to the spine diseases. Wherein, the symptoms of scoliosis and the like of the teenagers can be physically corrected by means of physical traction, bracket fixation and the like. However, in the face of the increasing incidence of the juvenile spondylopathy year by year, only obvious treatment is insufficient, more attention should be paid to the prevention of the juvenile spondylopathy, and the current situation that the incidence of the spondylopathy is higher and higher is fundamentally improved.
As a popular furniture, the chair back is a straight back, and the seat surface is parallel to the ground. Although the straight-back chair is simple to manufacture, the straight-back chair can not keep normal physiological curvature of a human body, is easy to cause poor sitting posture, can cause diseases such as humpback, round back or lateral curvature of spine and the like, and can bring hidden troubles to the health of cervical vertebra and lumbar vertebra. For teenagers, fatigue can be caused when the teenagers sit on the straight-back chair for a long time, the teenagers can naturally bow the waist or enable the spine to lean against the chair back with unnatural curvature, and the teenagers are excessively upright and lift the chest and head, so that the spine is easy to be tensed and fatigued, and adverse effects of straight back can be caused. Because the chair surface is parallel to the ground, the gravity center of the body of a person sitting on the chair surface is vertical to the ground, namely the weight of the upper half of the body is basically born by the lumbar vertebra segment, so that great pressure is brought to the lumbar vertebra, and the lumbar vertebra disease can be induced after a long time.
In order to prevent sitting posture deformation caused by long-time sitting of teenagers, corresponding chair for preventing spinal curvature appears on the market at present, but the existing chair for preventing spinal curvature obviously has the following defects:
1. the user is fixed on the chair back by mostly adopting an elastic rope or an elastic bandage, and although the elastic rope can adapt to users with different body types, the obvious effect on users with thinner body types is poorer;
2. only the user is fixed on the chair back to prevent the user from bowing the waist and preventing symptoms such as humpback and the like caused by the front and back bending of the spine, but the limiting effect on the left and right side bodies of the user is poor, and the side bending of the spine and related diseases caused by the long-time side bending of the body of the user cannot be effectively prevented;
3. when the chair is used for a long time, most of the weight of the upper half of the body is concentrated on the lumbar vertebra part, the lumbar vertebra is easy to fatigue after being stressed for a long time, and most of the existing chair for preventing the spinal curvature does not have the function of massaging the lumbar vertebra.
Therefore, there is a high necessity for a chair for preventing spinal curvature which prevents lateral curvature of the spine while preventing back and forth curvature of the spine, and which can appropriately massage a user to relieve fatigue.
Accordingly, the present invention provides a new chair for preventing spinal curvature to solve this problem.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a multi-prevention spinal bending chair, which effectively solves the problems that the existing spinal bending prevention chair cannot prevent scoliosis, has poor prevention effect and does not have a massage function.
The invention comprises a chair main body and is characterized in that the main body is connected with an anti-lateral bending device in a vertical sliding manner, and the main body is connected with an anti-humpback device in a front-back sliding manner;
the lateral bending prevention device comprises two vertical plates which are connected to the main body in a vertical sliding mode, a vertical rack and a transverse rack are fixedly connected to the two vertical plates, the two vertical racks and the two transverse racks are connected with a first driving motor which is fixedly connected to the main body through a vertical plate transmission wheel set, and the first driving motor can drive the two vertical plates to rise and slide left and right to clamp a user after rising to the top end when working;
the anti-humpback device comprises a semicircular guide rail which is connected to the main body in a front-back sliding mode, two arc-shaped buckles are connected to the semicircular guide rail in a sliding mode, arc-shaped racks are fixedly connected to the arc-shaped buckles, the arc-shaped racks are meshed with buckle driven gears which are connected to the semicircular guide rail in a rotating mode, the buckle driven gears are connected to second driving motors on the main body through buckle transmission wheel sets and fixed gears, the second driving motors can drive the arc-shaped buckles to penetrate through the main body and fix a user on the main body.
Preferably, the main body comprises a seat plate, the rear end of the seat plate is connected with a backrest plate, handrails are fixedly connected with the two sides of the seat plate, the back board rear end face is fixedly connected with a guide groove, the semicircular guide rails are fixedly connected with guide keys which are arranged in the guide groove in a sliding manner, each guide key penetrates through the guide groove and is fixedly connected with a fixed connecting rod, the fixed connecting rod connects all the guide keys into a whole, the lower end of the fixed connecting rod is fixedly connected with a guide rail driving rack which is connected with the guide groove in a sliding way, a guide rail driving gear which is rotatably connected to the guide groove is meshed beside the guide rail driving rack, a guide rail driving belt pulley is coaxially and fixedly connected with the guide rail driving gear, the guide rail driving belt pulley is connected with the guide rail transmission wheel set on the main body in a rotating mode and is connected with the guide rail adjusting gear on the handrail in a rotating mode, and a user can adjust the semicircular guide rail to slide back and forth by shifting the guide rail adjusting gear.
Preferably, the buckle transmission wheel group comprises a buckle motor gear which is rotatably connected to the rear end face of the back board, the buckle motor gear is connected with a second driving motor which is fixedly connected to the back board, a buckle driving gear which is rotatably connected to the rear end face of the back board is meshed beside the buckle motor gear, the buckle motor gear and the buckle driving gear are coaxially and fixedly connected with a buckle driving belt pulley, the buckle driving belt pulley is connected with two buckle driven gear, and the buckle driven gear is coaxially and fixedly connected with a buckle driven belt pulley which is connected with two buckle driving belt pulleys through a group of tensioning devices.
Preferably, the two groups of tensioning devices respectively comprise two tensioning connecting rods, one ends of the two tensioning connecting rods are hinged together, the other ends of the two tensioning connecting rods are respectively and rotatably connected to the buckle driving belt pulley and the buckle driven belt pulley, the hinged positions of the two tensioning connecting rods are rotatably connected with the tensioning belt pulley, and the buckle driving belt pulley is connected with the buckle driven belt pulley by bypassing the tensioning belt pulley through a belt.
Preferably, the vertical plate transmission wheel group comprises two vertical driving gears which can be respectively meshed with the two vertical racks and are rotatably connected to the bottom surface of the seat plate and two transverse driving gears which can be respectively meshed with the two transverse racks and are rotatably connected to the bottom surface of the seat plate, the two vertical driving gears are coaxially and fixedly connected and are connected with the first driving motor through worm and gear transmission, the two transverse driving gears are connected with the worm and gear through a bevel gear and a belt pulley and are connected with the first driving motor, long gears which can be meshed with the vertical racks are coaxially and rotatably connected beside the two vertical driving gears, the two long gears do not rotate along with the two vertical driving gears, positioning ratchet wheels are coaxially and fixedly connected with the two long gears, and a positioning pawl which is rotatably connected to the bottom surface of the seat plate is matched beside each positioning ratchet wheel, so that when the two vertical racks slide to the corresponding long gears, the vertical racks cannot fall down due to gravity.
Preferably, sliding connection has a plurality of massage pieces around on the back board, be equipped with behind the massage piece and rotate the connection and be in drive disc on the back board, fixedly connected with can be with a plurality of on the drive disc the lug of massage piece contact, the coaxial fixedly connected with disc driven pulley of drive disc, the disc driven pulley passes through the belt and rotates the disc drive pulley of connection on the back board and links to each other, the third driving motor on disc drive pulley and the fixed connection back board links to each other.
Preferably, the seat plate is vertically and slidably connected with a pressing plate, the lower end of the pressing plate penetrates through the seat plate and is slidably connected with a switch rod rotatably connected to the bottom surface of the seat plate, the other end of the switch rod is in contact with the third driving motor switch, and the other end of the lower end of the pressing plate is fixedly connected with a return spring fixedly connected to the bottom surface of the seat plate.
Preferably, the back board rotate to be connected the seat rear end, the seat front end rotate and be connected with the leg rest board, the equal coaxial fixedly connected with of pivot of back board and leg rest board rotate and connect and be in the swing driven pulley of seat one side, seat side rotate be connected with two respectively with two the swing drive belt pulley that the swing driven pulley belt is connected, two the equal coaxial fixedly connected with swing driven gear of swing drive belt pulley, two swing driven gear between the meshing have one to rotate to be connected the swing drive gear of seat side, the coaxial fixedly connected with screens ratchet of swing drive gear, the other cooperation of screens ratchet have the rotation to be connected the screens pawl on the seat.
Preferably, the rotating shafts of the back board and the leg supporting board are respectively sleeved with a snap spring, the clamping pawl is fixedly connected with a handle, and a user can press the handle to restore the back board and the leg supporting board to the original positions.
Preferably, the front end of the leg supporting plate is connected with a telescopic plate in a front-back sliding mode, the front end of the telescopic plate is connected with a foot clamping plate in a rotating mode, the telescopic plate is communicated with the hydraulic cylinder through a hose, and the telescopic plate can be controlled by the hydraulic cylinder to stretch.
The invention improves the existing chair for preventing spinal curvature, uses the rigid arc buckle which can be adjusted front and back to replace the flexible bandage, enhances the correction effect and can be adjusted at the same time, and is suitable for people without body shapes; the anti-lateral bending device is additionally arranged to prevent the lateral bending of the spine caused by long-time lateral bending of the body of a user; and a waist and back massage device is additionally arranged to massage the sedentary user, so that other symptoms caused by long-time fatigue of muscles are prevented.
Drawings
Fig. 1 is a first perspective view of the present invention.
FIG. 2 is a schematic front view of the present invention.
FIG. 3 is a rear view of the present invention.
Fig. 4 is a perspective view of the second embodiment of the present invention.
Fig. 5 is a perspective view of the present invention in use.
Fig. 6 is a schematic perspective view of the working principle of the anti-lateral bending device of the present invention.
Fig. 7 is a perspective view of a portion of the driving structure of the anti-lateral bending apparatus of the present invention.
Fig. 8 is a perspective view of the humpback preventing device of the present invention.
Fig. 9 is a right perspective view of the present invention.
Fig. 10 is a perspective view of the massage device of the present invention.
Fig. 11 is a perspective view of the massage block of the present invention.
FIG. 12 is a perspective view of a drive disk of the present invention.
Fig. 13 is a perspective view of the back board and leg board driving structure of the present invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 13. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The chair for preventing the spine from bending comprises a chair main body 1, wherein the main body 1 is in a common chair shape and is placed on the ground when being used specifically, a user sits on the chair, and the main body 1 provides a fixed foundation for a subsequent structure at the same time, and is characterized in that the main body 1 is connected with an anti-lateral bending device 2 in an up-and-down sliding manner, and the main body 1 is connected with an anti-humpback device 3 in a front-and-back sliding manner; the anti-lateral bending device 2 is designed aiming at the problem that the existing equipment in the background technology has no anti-lateral bending capability, so that the problem that the user has a wrong sitting posture for a long time to cause the lateral bending of the spine is prevented, and the anti-humpback device 3 is designed aiming at the problem that the existing equipment in the background technology has a poor effect on preventing the front and back of the spine from being completely and preventing the situation that the user leans forward for a long time to cause the humpback from occurring.
The lateral bending prevention device 2 comprises two vertical plates 4 which are connected to the main body 1 in a vertical sliding manner, the two vertical plates 4 are lifted to limit a user between the two vertical plates 4, so that the user is prevented from lateral bending of the spine caused by left and right lateral bending for a long time, a vertical rack 5 and a transverse rack 6 are fixedly connected to the two vertical plates 4, specifically, a through groove with an opening at the lower end is formed in each vertical plate 4, a vertical rack 5 is fixedly connected to one side of the inner wall of the through groove, the two vertical racks 5 and the two transverse racks 6 are connected with a first driving motor 8 fixedly connected to the main body 1 through a vertical plate transmission wheel set 7, and as the vertical racks 5 and the transverse racks 6 are fixedly connected to the two vertical plates 4, namely, the output ends of the transmission wheel sets 7 are gears capable of being matched with the vertical racks 5 and the transverse racks 6, the transmission wheel set 7 is only used for changing the direction of the output power of the first driving motor 8 and outputting the changed direction, and has no special function, and the vertical rack 5 and the horizontal rack 6 are both standard components, so that a person skilled in the art can easily achieve the functions required by the transmission wheel set 7 through the combination of common structures, the embodiment provides a transmission structure, referring to fig. 7, which includes a worm gear and a worm driven by the first driving motor 8 as an input end, the worm gear is coaxially and fixedly connected with a belt pulley and is connected with the belt pulley rotatably connected with the lower end surface of the seat plate 15 through a belt, so as to drive the bevel gear which is coaxially and fixedly connected, the horizontal rack 6 is driven through the changed direction bevel gear, and other changed direction transmission structures can be adopted to achieve the transmission purpose, so that the first driving motor 8 can work to drive the two vertical plates 4 to rise and can slide left and right, the vertical plate 4 can slide left and right after rising to the top end to adapt to users with different body types, so that the applicability of the device is improved, and the prevention effect is further enhanced;
the humpback preventing device 3 comprises a semicircular guide rail 9 which is connected with the main body 1 in a front-back sliding manner, two arc-shaped retaining rings 10 are connected with the semicircular guide rail 9 in a sliding manner, the two arc-shaped retaining rings 10 are used for fixing a user on the main body 1 and particularly should be fixed on a backrest of the main body 1, the two arc-shaped retaining rings 10 are made of rigid materials, the inner walls of the two arc-shaped retaining rings 10 can be polished into circular arcs or fixed slivers so as to prevent the user from being injured due to long-term use, the two arc-shaped retaining rings 10 are fixedly connected with arc-shaped racks 11, the special attention is paid that the width of the arc-shaped retaining rings 10 is larger than the width of the arc-shaped racks 11, namely, the inner walls of the arc-shaped retaining rings 10 are positioned at the outer sides of the teeth on the arc-shaped racks 11 so as to prevent the arc-shaped racks 11 from being exposed outside to, the said driven gear 12 of the buckle should be installed in the position close to the back board 16, so that the said arc buckle 10 can be buckled after stretching out the back board 16, if the position of the driven gear 12 of the buckle is located in the middle of the semicircular guide rail 9, it needs to lengthen the corresponding arc buckle 10, which will cause the said arc buckle 10 to expose part outside the back board 16 when the device is not used, it is easy to cause inconvenience to the user, the driven gear 12 of the buckle rotates and can drive the said arc buckle 10 to pass through the back of the body 1 through the arc rack 11 to fix the user on the body 1, so as to prevent the user from sitting incorrectly, two said driven gears 12 of the buckle are connected with the second driving motor 14 fixedly connected to the said body 1 through the transmission wheel set of the buckle, so that the second driving motor 14 can drive two said arc buckles 10 to pass through the said body 1 and buckle the user on the body 1, it should be noted that, in order to protect the second driving motor 14, a contact sensor is fixedly installed at both ends of one of the arc-shaped retaining rings 10 and a control module is integrated therein, the control module is connected with the second driving motor 14 and controls the second driving motor 14 to stop working, when the two arc-shaped retaining rings 10 are buckled, the contact sensor is triggered, the second driving motor 14 stops working, and the situation that the second driving motor 14 continues working after the two arc-shaped retaining rings 10 are buckled to cause motor burnout or a certain link collapse in the transmission process is prevented, in the embodiment, when the device is used specifically, a user sits on the main body 1, controls the anti-lateral bending device 2 and the anti-humpback device 3 to work by controlling the first driving motor 8 and the second driving motor 14, the two vertical plates 4 are respectively lifted from both sides of the user and moved to the middle after being lifted to the top end until contacting the user, meanwhile, two arc-shaped buckles 10 penetrate through the main body 1 to fix a user sitting on the main body 1 on the backrest of the main body 1, so that the user is prevented from tilting forwards.
In the second embodiment, on the basis of the first embodiment, the structure described in the first embodiment can only fix the user on the main body 1, and in this embodiment, an adjustable humpback preventing device 3 is provided for different user's body shapes in practical use, so as to increase the application range of this device, specifically, the main body 1 includes a seat plate 15, a back plate 16 is connected to the rear end of the seat plate 15, handrails 17 are fixedly connected to both sides of the seat plate 15, the back plate 16, and the handrails 17 are all the same as those of existing chairs, the back plate 16 can be designed with an appropriate curvature and curvature according to the curvature of the back of the human body, a guide groove 18 is fixedly connected to the rear end surface of the back plate 16, guide keys slidably disposed in the guide groove 18 are fixedly connected to the semicircular guide rail 9, the guide groove 18 is used for guiding the front-back sliding of the semicircular guide rail 9, and can be one or more, in order, three guide grooves 18 are respectively used for guiding the arc top and two ends of the semicircular guide rail 9, the semicircular guide rail 9 slides along the guide grooves 18 by virtue of guide keys, each guide key penetrates through the guide groove 18 and is fixedly connected with a fixed connecting rod 20, the fixed connecting rod 20 connects all the guide keys into a whole, namely, a plurality of guide keys on the semicircular guide rail 9 are connected with the same fixed connecting rod 20, namely, the fixed connecting rod 20 can slide to drive the semicircular guide rail 9 to slide simultaneously, referring to figure 8, the fixed connecting rod 20 is formed by connecting a plurality of connecting rods so as to connect all the guide keys, but in the moving process of the semicircular guide rail 9, the plurality of connecting rods forming the fixed connecting rod 20 do not move relatively, so that the fixed connecting rod 20 formed by the plurality of connecting rods can be regarded as a whole, and a special-shaped connecting rod capable of connecting all the guide keys can be used as the fixed connecting rod 20, the reason why the special-shaped connecting rod is not adopted in the embodiment is that the special-shaped connecting rod is not convenient to repair and replace, the lower end of the fixed connecting rod 20 is fixedly connected with the guide rail driving rack 21 which is slidably connected to the guide groove 18, the guide rail driving gear 22 which is rotatably connected to the guide groove 18 is engaged beside the guide rail driving rack 21, the guide rail driving gear 22 is coaxially and fixedly connected with the guide rail driving belt pulley 23, the guide rail driving belt pulley 23 is connected with the guide rail adjusting gear 25 which is rotatably connected to the main body 1 through the guide rail transmission wheel set 24 which is rotatably connected to the armrest 17, so that a user can adjust the semicircular guide rail 9 to slide back and forth by shifting the guide rail adjusting gear 25, the guide rail transmission wheel set 24 is only used for changing the driving force of the guide rail adjusting gear 25 and transmitting the driving force to the guide rail driving gear, for example, the specific structure of the guide rail transmission wheel set 24 is not described in detail, the present invention adopts a belt pulley coaxially and fixedly connected with the guide rail driving gear 22, a belt pulley coaxially and fixedly connected with the guide rail adjusting gear 25 and a belt to achieve the effect of transmitting the driving force of the guide rail adjusting gear 25 to the guide rail driving gear 22, and can also adopt other transmission structures to achieve the effect, when in specific use, a user sits on the seat plate 15 and controls the two arc-shaped buckles 10 in the humpback prevention device 3 to buckle so as to fix the user on the backrest plate 16, the two arc-shaped buckles 10 buckle in front of the backrest plate 16 through the backrest plate 16, at this time, the fatigable body type of the humpback prevention device 3 can be allowed, then the guide rail adjusting gear 25 is shifted, the two semicircular guide rails 9 slide backwards along the guide grooves 18, the distance between the arc tops of the arcs formed by the two arc-shaped buckles 10 and the backrest plate 16 gradually approaches, therefore, a thinner user is gradually fastened on the backboard 16, and it should be noted that, in practical use, if the user is not easy to move the guide rail adjusting gear 25, the rocking handle can be coaxially and fixedly connected to one side of the guide rail adjusting gear 25, so as to facilitate the user to use.
In the third embodiment, on the basis of the first embodiment, the retaining ring transmission wheel set in the first embodiment transmits the power of the second driving motor 14 fixedly connected to the main body 1 to the arc-shaped retaining ring 10 and drives the arc-shaped retaining ring 10 to slide in the semicircular guide rail 9, however, in the second embodiment, the semicircular guide rail 9 can slide back and forth to adapt to users of different sizes, that is, the output end position is not fixed, and it is difficult to achieve this effect, so that in the present embodiment, a transmission structure capable of moving along with the semicircular guide rail 9 is provided to meet the requirement, specifically, the retaining ring transmission wheel set includes a retaining ring motor gear 26 rotatably connected to the rear end surface of the backrest plate 16, the retaining ring motor gear 26 is connected to the second driving motor 14 fixedly connected to the backrest plate 16, that is, the retaining ring motor gear 26 is the input end of the retaining ring transmission wheel set, and is fixed in position and only, a buckle driving gear 27 rotatably connected to the rear end face of the back plate 16 is engaged with the buckle motor gear 26, the buckle motor gear 26 and the buckle driving gear 27 are coaxially and fixedly connected with a buckle driving pulley 28, the two buckle driven gears 12 are coaxially and fixedly connected with a buckle driven pulley 29, the two buckle driven pulleys 29 are respectively connected with the two buckle driving pulleys 28 through a group of tensioning devices 30, the buckle driving pulley 28, the buckle driven pulley 29 and the tensioning devices 30 are connected through a belt, that is, the power input by the buckle motor gear 26 can still be stably input to the buckle driven gears 12 on both sides in the front and back sliding process of the semicircular guide rail 9 through a buckle driving pulley group consisting of the buckle driving pulley 28, the buckle driving pulley 29, the tensioning devices 30 and the belt, it should be noted that the tensioning device 30 can self-adjust during the process of the semicircular track 9 driving the driven buckle pulley 29 to move and keep the belt in a tensioned state all the time to ensure that the power of the buckle driving pulley 28 can be smoothly and efficiently transmitted to the buckle driven pulley 29.
Fourth embodiment, on the basis of the third embodiment, the tensioning devices 30 in the third embodiment need to be self-adjustable along with the forward and backward sliding of the semicircular guide rail 9, so that the belt between the buckle driving pulley 28 and the buckle driven pulley 29, and the tensioning devices 30 is always tensioned, in this embodiment, a relatively simple and stable structure is provided to achieve this function, and each of the two specific sets of tensioning devices 30 includes two tensioning links 31 with one end hinged together, the other ends of the two tensioning links 31 are respectively and rotatably connected to the buckle driving pulley 28 and the buckle driven pulley 29, the hinged position of the two tensioning links 31 is rotatably connected to the tensioning pulley 32, the buckle driving pulley 28 is connected to the buckle driven pulley 29 by the belt passing around the tensioning pulley 32, and when the semicircular guide rail 9 drives the buckle driven pulley 29 to slide, under the action of the two mutually hinged tensioning links 31, the tension pulley 32 moves along with the movement of the tension pulley, so that the distances among the buckle driving pulley 28, the buckle driven pulley 29 and the tension pulley 32 are always equal, the belt is always in a tension state, in order to ensure the stable operation of the device, a sliding groove fixed on the rear end face of the backboard 16 can be additionally arranged according to the sliding track of the tension pulley 32, and a pulley shaft of the tension pulley 32 is arranged in the sliding groove, so that the tension pulley 32 can stably work in the swinging process of the tension connecting rod 31.
Fifth embodiment, on the basis of the second embodiment, the vertical plate transmission wheel set 7 of the first embodiment needs to simultaneously achieve vertical lifting and horizontal left-right sliding of the vertical plate 4, the prior art can achieve the needs thereof but has a relatively complicated structure or needs to be electrically controlled, in this embodiment, a purely mechanical structure is provided for the characteristics of the device to achieve the needs, specifically, the vertical plate transmission wheel set 7 includes two vertical driving gears 33 which can be respectively engaged with the two vertical racks 5 and rotatably connected to the bottom surface of the seat plate 15 and two horizontal driving gears 34 which can be respectively engaged with the two horizontal racks 6 and rotatably connected to the bottom surface of the seat plate 15, when in use, the two vertical driving gears 33 drive the vertical plate 4 to rise through the vertical racks 5, the two horizontal driving gears 34 rotate synchronously while the two vertical driving gears 33 rotate, when the vertical plate 4 rises to engage with the two horizontal racks 6 and the two horizontal driving gears 34, namely, the vertical plates 4 rise to the top, at the moment, the two vertical plates 4 move towards the middle part of the seat 15 under the action of the transverse rack 6 and the transverse driving gear 34 until contacting with a user, in order to ensure that the two vertical plates 4 can stop contacting with the user in a transverse moving manner in time, pressure sensors can be fixedly arranged on the inner side walls of the two vertical plates 4, a control module is integrated in the pressure sensors, the control module is connected with the first driving motor 8, namely when the pressure sensors are triggered, the first driving motor 8 stops working, the two vertical plates 4 do not move any more, the two vertical driving gears 33 are coaxially and fixedly connected and are connected with the first driving motor 8 through worm gear and worm gear transmission, the two transverse driving gears 34 are connected with the worm gear and the first driving motor 8 through bevel gears and belt pulleys, namely, the transmission structure for the first driving motor 8 to drive the two vertical driving gears 33 and the two transverse driving gears 34, other common structures can be used for replacement, the two vertical driving gears 33 are coaxially and rotatably connected with long gears 35 capable of being meshed with the vertical racks 5, the two long gears 35 do not rotate along with the two vertical driving gears 33, that is, the long gears 35 can be sleeved on a shaft between the two vertical driving gears 33 through bearings in a hollow manner, the two long gears 35 are coaxially and fixedly connected with positioning ratchet wheels 36, a positioning pawl 37 rotatably connected to the bottom surface of the seat plate 15 is matched beside each positioning ratchet wheel 36, that is, the long gears 35 can only rotate in one direction under the action of the positioning ratchet wheels 36 and the positioning pawl 37, so that the two vertical racks 5 cannot fall down due to gravity when sliding onto the corresponding long gears 35, and the long gears 35, the positioning ratchet wheels 36 and the positioning pawl 37 in the embodiment only play a positioning role, the vertical plate 4 is prevented from falling after being separated from the vertical driving gear 33, and other structures such as a sliding groove fixed on the lower end face of the seat 15 and a sliding key fixed on the vertical plate 4 can also be adopted.
Sixth embodiment, on the basis of the second embodiment, this embodiment is directed to the problem that the existing device described in the background art does not have the massage capability, and in this embodiment, a waist and back massage structure is provided, specifically, a plurality of massage blocks 38 are slidably connected to the backrest plate 16 back and forth, the massage blocks 38 are folded at the rear portion of the backrest plate 16 when not in use at ordinary times, the front end surfaces of the massage blocks 38 are flush with the front end surface of the backrest plate 16 to prevent the massage blocks 38 from protruding or recessing to cause discomfort to a user, a driving disc 39 rotatably connected to the backrest plate 16 is arranged behind the massage blocks 38, a projection 40 capable of contacting with the plurality of massage blocks 38 is fixedly connected to the driving disc 39, the driving disc 39 rotates to drive the projection 40 to rotate and eject the plurality of massage blocks 38 in turn, in order to ensure that the massage blocks 38 can return to the original position after being ejected, a spring can be fixedly connected between the massage blocks 38 and the backrest plate 16 for returning, the coaxial fixedly connected with disc driven pulley 41 of drive disc 39, disc driven pulley 41 passes through the belt and rotates the disc drive pulley 42 of connecting on back board 16 and link to each other, disc drive pulley 42 links to each other with the third driving motor 43 on the fixedly connected back board 16, and the power transmission of passing through disc drive pulley 42, disc driven pulley 41 and belt with third driving motor 43 promptly is for drive disc 39, can control drive disc 39 and then control the flexible of massage piece 38 through third driving motor 43.
Seventh embodiment, on the basis of the sixth embodiment, the present embodiment provides a mechanical automatic triggering device for stretching and retracting massage of the massage block 38, specifically, the seat plate 15 is connected with a pressing plate 44 in a vertical sliding manner, the lower end of the pressing plate 44 penetrates through the seat plate 15 and is connected with a switch lever 45 rotatably connected to the bottom surface of the seat plate 15, the other end of the switch lever 45 is in switch contact with the third driving motor 43, the lower end of the pressing plate 44 is fixedly connected with a return spring 46, the other end of the return spring is fixedly connected to the bottom surface of the seat plate 15, when the device is used specifically, after a user sits on the seat plate 15, the pressing plate 44 is pressed, the pressing plate 44 presses the switch lever 45 to start the third driving motor 43, the third driving motor 43 works to drive the driving disc 39 to work so as to drive the massage block 38 to stretch and massage, when the user gets up, the pressing plate 44 is lifted up and, the third drive motor 43 is deactivated and the massage mass 38 is spring loaded after the back board 16 is retracted.
In an eighth embodiment, on the basis of the second embodiment, the backrest plate 16 is rotatably connected to the rear end of the seat plate 15, the front end of the seat plate 15 is rotatably connected with the leg supporting plate 47, the rotation shafts of the backrest plate 16 and the leg supporting plate 47 are coaxially and fixedly connected with the swinging driven pulley 48 rotatably connected to one side of the seat plate 15, the side surface of the seat plate 15 is rotatably connected with two swinging driving pulleys 49 respectively connected to the two swinging driven pulleys 48 via belts, the two swinging driving pulleys 49 are coaxially and fixedly connected with the swinging driven gear 50, a swinging driving gear 51 rotatably connected to the side surface of the seat plate 15 is engaged between the two swinging driven gears 50, the swinging driving gear 51 is coaxially and fixedly connected with the positioning ratchet 52, a positioning pawl 53 rotatably connected to the seat plate 15 is engaged beside the positioning ratchet 52, that is, if the user needs to lie down for rest or needs to adjust the backrest backwards, the user only needs to dial the blocking pawl 53 and recline backwards, and then puts down the blocking pawl 53 after adjusting to the required position, while the backrest plate 16 swings backwards, the leg support plate 47 swings upwards synchronously, because the two swing driven pulleys 48, the swing driving pulley 49 and the swing driven gear 50 are completely the same parts, the leg support plate 47 and the backrest plate 16 all swing at the same angle, the ratchet pawl is arranged for blocking the backrest plate 16, so as to prevent the backrest plate 16 from being unstable after the adjustment is not needed or the adjustment is finished, and the user can not be stably supported, after the use of the device is finished, the user only needs to dial the blocking pawl 53 again and press the leg support plate 47 downwards, the leg support plate 47 and the backrest plate 16 can be pressed back, special attention needs to be paid, because the backrest plate 16 can swing, the third driving motor 43 should be fixedly installed at the rear end surface of the back board 16 and should not be installed under the seat board 15, and the switch lever 45 should be connected to the third driving motor 43 through the back board 16 in an inclined manner to control the operation of the third driving motor 43.
In the ninth embodiment, on the basis of the eighth embodiment, in order to facilitate the eighth embodiment to pull out the detent pawl 53, the present embodiment is modified to make the present invention easier to use, the rotating shafts of the backrest plate 16 and the leg supporting plate 47 are both sleeved with return coil springs, and the detent pawl 53 is fixedly connected with a handle 54.
Tenth embodiment, on the basis of the eighth embodiment, the arrangement of the present embodiment provides a new use mode, that is, the fatigue of the muscles of the waist and back is easy to occur after a user sits on the device for a long time, the arrangement of the present embodiment enables the user to lie down for rest after fatigue, compared with the eighth embodiment in which the backrest plate 16 is laid down, since the backrest of a common chair is lower and is located below the shoulder blades of the back, if the backrest plate 16 is laid flat, the head of the user will be in a suspended state, which will bring uncomfortable use experience to the user, the present embodiment is improved, specifically, the front end of the leg supporting plate 47 is connected with the retractable plate 55 in a front-back sliding manner, the front end of the retractable plate 55 is connected with the foot clamping plate 56 in a rotating manner, the retractable plate 55 is communicated with the hydraulic cylinder through the hose, and the hydraulic cylinder can control the retractable plate 55 to extend and retract, and, if the user needs to lie down for rest, the user needs to put the feet under the foot clamping plate 56, then the handle 54 is pressed to press the backboard 16 to lie flat, meanwhile, the hydraulic cylinder is controlled to pressurize, the expansion plate 55 extends out to drag the user forward, namely, after the backboard 16 is laid flat, the whole body of the user lies on the device, and the device is positioned at the back position of the user at the moment, so that the back fatigue of the user can be massaged and relieved.
When the massage chair is used specifically, a user sits on the seat plate 15, the back of the user leans against the backrest plate 16, the backrest plate 16 cannot swing downwards even if the user presses the backrest plate 16 forcibly due to the use of the clamping ratchet wheel 52 and the clamping pawl 53, the user presses the pressing plate 44 after sitting on the seat plate 15, the pressing plate 44 presses the switch lever 45, the third driving motor 43 is started accordingly, the third driving motor 43 works to drive the driving disc 39 to work, and the massage blocks 38 are driven to stretch and massage;
at this time, a user only needs to control the first driving motor 8 and the second driving motor 14 to work, the anti-lateral bending device 2 and the anti-humpback device 3 can be started at the same time, specifically, when the anti-lateral bending device 2 works, the first driving motor 8 works to drive the two vertical driving gears 33 and the two horizontal driving gears 34 to work, the two vertical driving gears 33 drive the vertical plates 4 to rise through the vertical racks 5, when the vertical plates 4 rise to the state that the two horizontal racks 6 are engaged with the two horizontal driving gears 34, namely, the vertical plates 4 rise to the top end, at this time, the two vertical plates 4 move towards the middle part of the seat plate 15 under the action of the horizontal racks 6 and the horizontal driving gears 34 until contacting with the user, pressure sensors are fixedly installed on the inner side walls of the two vertical plates 4, and a control module is integrated in the pressure sensors and connected with the first driving motor 8, namely, when the pressure sensor is triggered, the first driving motor 8 stops working, the two vertical plates 4 do not move any more, and the anti-lateral bending device 2 is started;
meanwhile, the second driving motor 14 drives the buckle motor gear 26 to work, and drives the two arc buckles 10 to pass through the backrest plate 16 to fix the user on the backrest plate 16 through the transmission of the buckle driving gear 27, the buckle driving belt pulley 28, the buckle driven belt pulley 29, the tensioning device 30 and the belt, after the two arc buckles 10 are buckled, the touch sensor is triggered and its internal integrated control module controls the second drive motor 14 to stop working, since the humpback preventing device 3 is in the maximum size state at this time, the user can toggle the guide rail adjusting gear 25, the two semicircular guide rails 9 are driven to synchronously move backwards under the action of the guide rail transmission wheel set 24, the guide rail driving belt pulley 23, the guide rail driving gear 22 and the guide rail driving rack 21, and thus drive two already buckled said arcuate snap rings 10 to move backward synchronously, so as to fix the user on the back board 16 firmly;
when a user needs to lie down for rest, the user only needs to put feet under the foot clamping plate 56, then presses the handle 54 to press the backboard 16 to lie flat, controls the hydraulic cylinder to pressurize, stretches out the expansion plate 55 to drag the user forwards, namely, the whole body of the user lies on the device after the backboard 16 is laid flat, and the device is positioned at the back position of the user at the moment, so that the back fatigue of the user can be massaged and relieved;
for the operation of the device, control modules can be arranged on the hydraulic cylinder, the first driving motor 8 and the second driving motor 14 to control the positive and negative rotation of the hydraulic cylinder, and meanwhile, the control modules of all driving elements are controlled by a remote controller, so that the operation of a user is facilitated;
after the device is used, a user only needs to press the handle 54, the clamping pawl 53 is pulled open, the leg supporting plate 47 and the backrest plate 16 return to the original positions simultaneously under the action of the two return coil springs, and the hydraulic cylinder, the first driving motor 8 and the second driving motor 14 are controlled to rotate reversely at the same time, so that the reset operation of the device is completed;
when the user gets up, the pressing plate 44 is lifted up and returned to the original position under the action of the return spring 46, the third driving motor 43 stops working, and the massage block 38 returns to the original state after the spring action is performed to retract the backrest plate 16.
The invention improves the existing chair for preventing spinal curvature, uses the rigid arc buckle which can be adjusted front and back to replace the flexible bandage, enhances the correction effect and can be adjusted at the same time, and is suitable for people without body shapes; the anti-lateral bending device is additionally arranged to prevent the lateral bending of the spine caused by long-time lateral bending of the body of a user; and a waist and back massage device is additionally arranged to massage the sedentary user, so that other symptoms caused by long-time fatigue of muscles are prevented.

Claims (8)

1. A chair for preventing spinal curvature comprises a chair main body (1), and is characterized in that the main body (1) is connected with a lateral curvature preventing device (2) in a vertical sliding manner, and the main body (1) is connected with a humpback preventing device (3) in a front-back sliding manner;
the lateral bending prevention device (2) comprises two vertical plates (4) which are vertically and slidably connected to the main body (1), a vertical rack (5) and a transverse rack (6) are fixedly connected to the two vertical plates (4), the two vertical racks (5) and the two transverse racks (6) are connected with a first driving motor (8) which is fixedly connected to the main body (1) through a vertical plate transmission wheel set (7), and the first driving motor (8) can work to drive the two vertical plates (4) to rise and can slide left and right to clamp a user after rising to the top end;
the humpback preventing device (3) comprises a semicircular guide rail (9) which is connected to a main body (1) in a front-back sliding mode, two arc-shaped buckles (10) are connected to the semicircular guide rail (9) in a sliding mode, arc-shaped racks (11) are fixedly connected to the two arc-shaped buckles (10), buckle driven gears (12) which are connected to the semicircular guide rail (9) in a rotating mode are meshed beside the two arc-shaped racks (11), the two buckle driven gears (12) are connected to a second driving motor (14) which is fixedly connected to the main body (1) through buckle transmission wheel sets, and the second driving motor (14) can drive the two arc-shaped buckles (10) to penetrate through the main body (1) to be buckled and fix a user on the main body (1) when working;
the main body (1) comprises a seat (15), the rear end of the seat (15) is connected with a backrest plate (16), handrails (17) are fixedly connected to two sides of the seat (15), a guide groove (18) is fixedly connected to the rear end face of the backrest plate (16), guide keys in the guide groove (18) are arranged in a sliding mode in a fixedly connected mode of a semicircular guide rail (9), each guide key penetrates through the guide groove (18) and is fixedly connected with a fixed connecting rod (20), all the guide keys are connected into a whole through the fixed connecting rods (20), a guide rail driving rack (21) connected onto the guide groove (18) in a sliding mode is fixedly connected to the lower end of each fixed connecting rod (20), a guide rail driving gear (22) connected onto the guide groove (18) in a rotating mode is meshed beside the guide rail driving rack (21), and a guide rail driving belt pulley (23) is coaxially, the guide rail driving belt pulley (23) is connected with a guide rail adjusting gear (25) which is rotationally connected with the handrail (17) through a guide rail transmission wheel set (24) which is rotationally connected with the main body (1), so that a user can adjust the semicircular guide rail (9) to slide back and forth by shifting the guide rail adjusting gear (25);
the buckle transmission wheel set comprises a buckle motor gear (26) rotatably connected to the rear end face of a back board (16), the buckle motor gear (26) is connected with a second driving motor (14) fixedly connected to the back board (16), a buckle driving gear (27) rotatably connected to the rear end face of the back board (16) is meshed beside the buckle motor gear (26), the buckle motor gear (26) and the buckle driving gear (27) are coaxially and fixedly connected with a buckle driving belt pulley (28), the buckle driven gear (12) is coaxially and fixedly connected with a buckle driven belt pulley (29), and the buckle driven belt pulley (29) is connected with the buckle driving belt pulley (28) through a set of tensioning device (30).
2. The chair for preventing spinal curvature as claimed in claim 1, wherein the two sets of tensioning means (30) each comprise two tensioning links (31) hinged together at one end, the other ends of the two tensioning links (31) are respectively rotatably connected to a buckle driving pulley (28) and a buckle driven pulley (29), a tensioning pulley (32) is rotatably connected to the hinged joint of the two tensioning links (31), and the buckle driving pulley (28) is connected to the buckle driven pulley (29) by a belt passing around the tensioning pulley (32).
3. The chair for preventing the spinal curvature as claimed in claim 1, wherein the vertical plate driving wheel set (7) comprises two vertical driving gears (33) rotatably connected to the bottom surface of the seat plate (15) and capable of meshing with the two vertical racks (5) respectively and two horizontal driving gears (34) rotatably connected to the bottom surface of the seat plate (15) and capable of meshing with the two horizontal racks (6) respectively, the two vertical driving gears (33) are coaxially and fixedly connected and connected with the first driving motor (8) through worm gear and worm gear transmission, the two horizontal driving gears (34) are connected with the first driving motor (8) through bevel gears and belt pulleys, a long gear (35) capable of meshing with the vertical rack (5) is coaxially and rotatably connected beside the two vertical driving gears (33), two long gear (35) do not rotate along with two vertical drive gear (33), two long gear (35) all coaxial fixedly connected with location ratchet (36), every location ratchet (36) side all the cooperation have the rotation to be connected location pawl (37) of seat (15) bottom surface, make two vertical rack (5) can not fall because of gravity when sliding to corresponding long gear (35).
4. The chair for preventing the spinal curvature as claimed in claim 1, wherein the back board (16) is connected with a plurality of massage blocks (38) in a front-back sliding manner, a driving disc (39) rotatably connected to the back board (16) is arranged behind the massage blocks (38), the driving disc (39) is fixedly connected with a plurality of convex blocks (40) contacted with the massage blocks (38), the driving disc (39) is coaxially and fixedly connected with a disc driven pulley (41), the disc driven pulley (41) is connected with a disc driving pulley (42) rotatably connected to the back board (16) through a belt, and the disc driving pulley (42) is connected with a third driving motor (43) fixedly connected to the back board (16).
5. The chair for preventing the spinal curvature as claimed in claim 4, wherein the seat plate (15) is connected with a pressure plate (44) in a vertical sliding manner, the lower end of the pressure plate (44) penetrates through the seat plate (15) to be connected with a switch lever (45) rotatably connected to the bottom surface of the seat plate (15) in a sliding manner, the other end of the switch lever (45) is in switch contact with the third driving motor (43), and the lower end of the pressure plate (44) is fixedly connected with a return spring (46) the other end of which is fixedly connected to the bottom surface of the seat plate (15).
6. The chair for preventing spinal curvature according to claim 1, wherein the backrest plate (16) is rotatably connected to the rear end of the seat plate (15), the front end of the seat plate (15) is rotatably connected with a leg supporting plate (47), the rotation shafts of the backrest plate (16) and the leg supporting plate (47) are coaxially and fixedly connected with a swing driven pulley (48) rotatably connected to one side of the seat plate (15), the lateral surface of the seat plate (15) is rotatably connected with two swing driving pulleys (49) respectively connected with two swing driven pulleys (48) through belts, the two swing driving pulleys (49) are coaxially and fixedly connected with a swing driven gear (50), a swing driving gear (51) rotatably connected to the lateral surface of the seat plate (15) is engaged between the two swing driven gears (50), swing drive gear (51) coaxial fixedly connected with screens ratchet (52), screens ratchet (52) other cooperation have the rotation to be connected screens pawl (53) on seat (15).
7. The chair for preventing the spinal curvature as claimed in claim 6, wherein the rotation shafts of the back board (16) and the leg supporting board (47) are sleeved with snap springs, the detent pawl (53) is fixedly connected with a handle (54), and the user can press the handle (54) to restore the back board (16) and the leg supporting board (47).
8. The chair for preventing the spinal curvature as claimed in claim 6, wherein the front end of the leg supporting plate (47) is slidably connected with a retractable plate (55) back and forth, the front end of the retractable plate (55) is rotatably connected with a foot clamping plate (56), the retractable plate (55) is communicated with a hydraulic cylinder through a hose, and the hydraulic cylinder can control the retractable plate (55) to retract.
CN201810843298.0A 2018-07-27 2018-07-27 Chair capable of preventing spinal curvature Active CN108836595B (en)

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