46 results about "Antiparallelogram" patented technology

Disclosed is an epoxy resin cast dry type transformer, which comprises a low-voltage winding, two high-voltage windings, an iron core, an upper heel piece, a lower heel piece, an upper clamp, and a lower clamp. The low-voltage winding is arranged at the inner layer of the loop and the high-voltage windings are arranged at the outer layer of the loop. The low-voltage winding is made of clutch gold and is provided with an insulating interlayer which is presoaked with DMD resin. The initial loops of the high-voltage windings are located at one end of the whole loop, and the starting end of the first coil of each layer of the high-voltage windings is connected with the finishing end of the last coil of the next layer. The number of the coils of the windings descends from the inner layer to the outer layer, making the windings developing into antiparallelogram structures; a soft gridding cloth layer is arranged between each two adjacent layers; the whole medium is epoxy resin and solvent-free gridding material is arranged between the outer layers of the windings at both ends of the whole loop. The epoxy resin cast dry type transformer is reasonable in design, novel in design, large in power, and small in size, and is convenient to install and easy to maintain. The epoxy resin cast dry type transformer is safe, stable and reliable and is long in service life and low in using cost and requires no daily maintenance. The epoxy resin cast dry type transformer is of strong practicability and is applicable in power supplying departments and power consuming departments.

The invention discloses a central air-conditioning pipeline cleaning device. The central air-conditioning pipeline cleaning device comprises a vehicle body, a first cleaning device, second cleaning devices, a dust extraction device, a lifting mechanism and a controller, wherein a traveling driving device of the vehicle body is used for making the vehicle body travel in a pipeline, the first cleaning device and the controller are installed above the vehicle body, and a slider-crank mechanism is arranged in the first cleaning device to allow a rolling brush to move leftwards and rightwards while rotating, so that a larger area can be cleaned; the second cleaning devices are arranged on the two sides of the vehicle body and provided with anti-parallel quadrangle gear combination mechanisms, and by the adoption of the mechanisms, a hairbrush can rotate around other hair brushes while rotating by itself, so that cleaning is more thorough; the peripheral annular dust extraction device is adopted on the tail portion to improve cleaning efficiency greatly.

The invention relates to a heat radiator and a manufacturing process of the heat radiator. The heat radiator comprises a heat radiator panel, and a heat radiator backboard, and is characterized in that the heat radiator panel is a rectangular slot having a rectangular orthogonal projection and an antiparallelogram cross section and an antiparallelogram longitudinal section; the heat radiator backboard is a rectangular slot having a bottom face smaller than the bottom face of the heat radiator panel and an edge folding angle the same as the edge folding angle of the heat radiator panel, convex ribs are arranged in parallel at an equal interval on the bottom face of the heat radiator backboard, the heat radiator backboard is arranged in the slot of the heat radiator panel, the convex ribs of the backboard bottom face contact and are fixed together with the bottom face of the panel, and the rabbet edge of the heat radiator panel and the rabbet edge of the heat radiator backboard are combined together so as to form a heat radiator liquid channel in the heat radiator; and a water pipe is arranged in the heat radiator liquid channel and a heating medium is filled in the heat radiator liquid channel. Advantages of the invention include good appearance, practicability, safety and durability, high heat radiating efficiency, simple manufacturing process, and high efficiency. The invention is suitable for large-scale flow line production.

The invention relates to a spatial expansion mechanism utilizing an inverse-parallelogram. The mechanism is composed of a plurality of component units which are superimposed in series. Every component unit is composed of a middle frame, a first bar (1) which is connected at the conjunction of the head and the tail of an upper middle side bar (6) and a third bar (3) which is connected at the conjunction of the head and the tail of the lower middle side bar (6). An upper layer and a lower layer are connected through a middle frame connecting bar (4) and a second bar (2). The component units are connected through a nit connector (5) which is connected with one end of the third bar. The expansion of the mechanism is realized through the rotation of bar parts or the movement of the middle frame. The design is provided with simple structure and reaches the large contraction ratio through a small inverse-parallelogram. Due to the spatial symmetry of the mechanism, the bearing capacities of different directions in the space can be uniformly distributed. The whole mechanism has the characteristics of less used material, large expansion amplitude, good for bearing performance, strong stability, wide application range, simple manufacturing process, etc.

The invention discloses a reconfigurable axe-shaped dual mode monopole antenna. The axe-shaped dual mode monopole antenna comprises a medium board, a hollow-out metal plate, an axe-shaped monopole structure and an SMA head, wherein the hollow-out metal plate fits an upper surface of the medium board, the axe-shaped monopole structure fits a lower surface of the medium substrate, a step-shaped hollow-out slit is formed on the hollow-out metal plate through etching, an axe-shaped transverse portion of the axe-shaped monopole structure comprises antiparallelogram metal plates, the SMA head is arranged on the medium board, the axe-shaped monopole structure is electrically connected with a feed end of the SMA head, the hollow-out metal plate is electrically connected with a ground end of the SMA head, an upper portion of a tip end of the antiparallelogram metal plates is provided with a metal pad, the metal pad is in ground connection through a through hole, and the metal pad is connected with the tip end of the antiparallelogram metal plates through a lumped capacitor. The reconfigurable axe-shaped dual mode monopole antenna is advantaged in that independent tuning of two resonance modes can be realized, and the resonance modes are reconfigurable.

The invention aims to provide a pipe clamping jaw device in drilling wellhead operation, and particularly relates to an oil drilling pipe clamping jaw. The device can be mounted on a working platform so as to achieve automatic spatial discharging of vertical drill rods, the device can also be mounted at a drilling operation site to be used for transporting and moving various sorts of pipes, and the device is suitable for other occasions where the pipes need to be discharged as well. By means of the oil drilling pipe clamping jaw, the labor intensity of workers is lowered, working efficiency is improved, and potential safety hazards are eliminated. When the pipes are clamped, the pipe clamping jaw is adjusted to be in the appropriate posture, jaws can grab and compress the pipes automatically, and then the pipes are moved and discharged. The jaws and pressure levers are both of a contra-parallelogram structure, a driving hydraulic cylinder is omitted, and each pair of paws and pressure levers can operate synchronously.

The invention provides a multi-mode infinite overturning mechanism. The multi-mode infinite overturning mechanism comprises a first anti-parallelogram unit (A), a second anti-parallelogram unit (B), athird anti-parallelogram unit (C), a fourth anti-parallelogram unit (D), wherein the first anti-parallelogram unit (A) and the second anti-parallelogram unit (B) are rotatably connected through first, second, seventh and eighth connecting joints (A-1-1, A-1-2, B-2-1 and B-2-2) of first and fourth tail end rods (A-1 and B-2); the second anti-parallelogram unit (B) and the third anti-parallelogramunit (C) are rotatably connected through fifth, sixth, eleventh and twelfth connecting joints (B-1-1, B-1-2, C-2-1 and C-2-2) of third and sixth tail end rods (B-1 and C-2); the third anti-parallelogram unit (C) and the fourth anti-parallelogram unit (D) are rotatably connected through ninth, tenth, fifteenth and sixteenth connecting joints (C-1-1, C-1-2, D-2-1 and D-2-2) of fifth and eighth tailend rods (C-1 and D-2); and the fourth anti-parallelogram unit (D) and the first anti-parallelogram unit (A) are rotatably connected through thirteenth, fourteenth, third and fourth connecting joints(D-1-1, D-1-2, A-2-1 and A-2-2) of seventh and second tail end rods (D-1 and A-2). The mechanism can realize infinite overturning, has plane-symmetry, spherical-surface and plane-motion modes, and canbe folded into one plane.

The invention relates to a hydraulic drive parallel moving robot which comprises a spherical hinge triangular platform (A), a rotating hinge triangular platform (B), a driving arm (C), a driving arm (D), a driving arm (E), a long shaft (1), a long shaft (2) and a long shaft (3), wherein the three driving arms are respectively connected with the spherical hinge triangular platform and the rotating hinge triangular platform through a spherical pair and a rotating pair; each driving arm is a contra-parallelogram mechanism driven by a hydraulic cylinder; the robot deforms and moves by adjusting the telescopic change of the hydraulic cylinders which move independent of one another on the driving arms; by adopting the contra-parallelogram mechanisms as amplifying mechanisms, the work space and the deformation of the whole mechanism are greatly increased. By using the advantages of a hydraulic system, the hydraulic drive parallel moving robot has heavy load capacity; due to the adoption of a three-branched-chain parallel mechanism which has a degree of freedom being 3, the hydraulic drive parallel moving robot has the advantages of good stability, high rigidity, strong bearing capacity, stronger flexibility and deformation capability and capability of adapting to various complex environments.

The invention discloses an axe-shaped dual mode monopole antenna. The axe-shaped dual mode monopole antenna comprises a medium board, a hollow-out metal plate, an axe-shaped monopole structure and an SMA head, wherein the hollow-out metal plate fits an upper surface of the medium board, the axe-shaped monopole structure fits a lower surface of the medium substrate, a step-shaped hollow-out slit is formed on the hollow-out metal plate through etching, the axe-shaped monopole structure comprises a bar-shaped vertical portion and an axe-shaped transverse portion, the bar-shaped vertical portion of the axe-shaped monopole structure is perpendicular to long edges of the lower surface of the medium board, the axe-shaped transverse portion of the axe-shaped monopole structure comprises antiparallelogram metal plates symmetrically arranged at two sides of the bar-shaped vertical portion of the axe-shaped monopole structure, the SMA head is arranged on the medium board, the axe-shaped monopole structure is electrically connected with a feed end of the SMA head, and the hollow-out metal plate is electrically connected with a ground end of the SMA head. The axe-shaped dual mode monopole antenna is advantaged in that independent tuning of two resonance modes can be realized.

The invention relates to the technical field of water conservancy and hydropower building engineering, and discloses a multi-channel sill stilling pool for dispersion energy dissipation. The multi-channel sill stilling pool comprises a fall sill water flow inlet section, a stilling pool body, a stilling pool tail sill and a protector arranged in a water flowing direction in sequence; a wide flooding hole and a narrow flooding hole are staggered in the fall sill water flow inlet section; a separation wall is arranged between the wide flooding hole and the narrow flooding hole; an arc flow separation projection and multiple concrete piers are arranged in the stilling pool body in the water flowing direction in sequence at equal intervals; straight tooth patterns are uniformly distributed onthe surface of the flow separation projection in the peripheral direction; the section of each concrete pier is an antiparallelogram; and the protector is connected with the stilling pool tail sill tosolve the problems of higher water surface fluctuation, instable flowing state and damage of the internal structure of the stilling pool in energy dissipation of a traditional stilling pool.

The invention discloses a reverse-quadrilateral bisectional track robot, relating to a track mobile robot, in particular to a connecting rod module comprising four track modules and a reverse-quadrilateral mechanism. The connecting-rod mechanism is beneficial to overcoming the defect of insufficient flexibility of the track mobile robot and performing the characteristic of flexibility and changeableness of a connecting-rod mechanism so as to enable the mobile robot to better adapt to changes of the traveled ground and improve the obstacle navigation performance of the mobile robot. The robot comprises a connecting-rod module (A), a first track module (B1), a second track module (B2), a third track module (B3) and a fourth track module (B4), wherein the track modules and the connecting-rodmodule are respectively provided with a motor, the connecting-rod module is a reverse-quadrilateral mechanism, the first track module and the third track module are connected with a first vehicle body (1), and the second track module and the fourth track module are connected with the second vehicle body (6). The reverse-quadrilateral bisectional track robot has the characteristics of high stability, flexibility and changeableness, is applicable to bumpy ground and has improved obstacle navigation capability.

The invention discloses a special cleaning device for an air conditioner air pipe. A traveling driving device of a vehicle body is used for traveling in the pipe during pipe cleaning. Cleaning units I and a controller are installed above the vehicle body. The special cleaning device for the air conditioner air pipe is provided with slider-crank mechanisms, rolling brushes move leftwards and rightwards while rotating, and therefore a wider cleaning range can be achieved. Cleaning units II are arranged on the two sides of the vehicle body and provided with contra-parallelogram gear combination mechanisms, and by the adoption of the mechanisms, brushes can rotate around the other brushes while rotating around themselves, so that cleaning is more thorough. A peripheral annular dust suction device is adopted at the tail, so that cleaning efficiency is greatly improved.

The invention relates to a method for producing multi-difference multi-functional polyester low elastic yarn. The method comprises 1) mixing calcium carbonate whisker, sepiolite fibers, mica powder, ethylene glycol, propylene glycol, butanediol, p-hydroxybenzoic acid and sodium germanate to obtain an enhanced composite alcoholic solution, 2) mixing magnesium hydroxide whisker, barium sulfate powder, polyethylene glycol, propylene glycol, a high temperature antioxidant 1098, ethylene glycol antimony and protonating agent phosphoric acid to obtain an enhanced composite promoter, 3) carrying out multielement copolycondensation on the enhanced composite multi-functional alcohol solution, the enhanced composite promoter, refined terephthalic acid and ethylene glycol to obtain an enhanced modified polyester, ejecting the melt of the enhanced modified polyester through antiparallelogram-like spinneret orifices, and preparing the multi-difference multi-functional polyester low elastic yarn through a specific cooling curing method and an elasticity improvement technology. The method is simple. The produced fibers are one-component different shrinkage fibers, which have different crystallinity, different orientation and different shrinkage performances, and the appearance and form of the fiber subjected to different shrinkage are good.

The invention provides an on-line detection device for optical brix. The bottom and the top of a prism of a brix detector are rectangular and are parallel to each other; and the bottom surface of the prism of the brix detector is in contact with a detected medium by a sampling hole of a shell. The front and back side surfaces of the prism are antiparallelogram-shaped and are parallel to each other, and the left and right side surfaces of the prism are rectangular; and the crossed angle between each of the left and right side surfaces and the bottom surface is 60-70 degrees. An incident light beam is vertical to the top surface of the prism and is reflected by sampling surfaces of one side surface and the bottom surface; the returned light beam is reflected by the other side surface to fall down on an optical imaging sensor; and an obtained electric signal passes through a signal and calculation circuit board and outputs a current brix value of a detected medium. A temperature sensor is arranged and is used for carrying out real-time temperature compensation. A prism positioning plate, an optical path positioning plate and a positioning pressing plate are used for fixing the prism, a light source and a collecting lens. A washing facility is composed of a high-pressure hot steam generator and a steam pipeline. The prism with a trapezoid section has the small light signal loss; the size of the detector is reduced so that the detector is suitable for being mounted online; and the high-pressure and high-heat steam is used for washing so that scales are prevented, the measurement precision is guaranteed, and the shell is sealed so that the on-line detection device can work for a long period in a severe environment.

Provided is a one-stage forming processing accessory device used for sewing decorative strips on clothing. The device comprises a strip forming part and a supporting suspension arm. The strip forming part is formed by a strip forming guiding cylinder and a woven belt flattening carding frame. The strip forming guiding cylinder is formed by welding a front baffle plate and a rear baffle plate, and two ends of the cylinder are respectively a woven belt leading-in end and a woven belt folding forming output end. The strip forming guiding cylinder is in an antiparallelogram folded shape in a direction from the woven belt leading-in end to the woven belt folding forming output end. The rear part of the rear baffle plate is welded with a fixed connecting plate. The supporting suspension arm is in an L-shaped suspension arm structure, and is formed by a vertical arm and a horizontal arm. The vertical arm is abutted against the front side surface of the head of a sewing machine, and forms fixed connection with the head of a sewing machine in an up-down adjustable manner. The horizontal arm is abutted against the rear side surface of the fixed connecting plate, and forms horizontal adjustable fixed connection with the fixed connecting plate, so a distance is formed between the lower part of the strip forming part and a cover plate of a needle drop position of the sewing machine. The processing accessory device realizes one-stage forming sewing of the strips, so as to greatly save processing labor-hours, improve processing efficiency and reduce processing cost.

The invention relates to a combined type sieve tube aiming to overcome the defects of easy blockage of antiparallelogram gaps, poor self-cleaning capability, low pressure-bearing capacity and easily extruded damage of the traditional sand prevention sieve tubes. In the invention, the wall of a base tube is provided with an overflowing hole, and sieve blades are fixedly arranged on the outer circumference of the base tube; one end of an inner hole of each sieve blade is a straight hole, while the other end is a taper hole which is small inside and big outside; the end surface at one end of each sieve blade straight hole is a plane, while the other end surface is uniformly distributed with three or more lug bosses; the wall of the inner hole of each sieve blade is provided with an axial liquid flow trough; the excircle of the base tube is axially provided with a key; the part of the base tube, with a key, is sequentially provided with a gland, a plurality of sieve blades and a gland, and the glands are fixedly connected with the base tube; and the sieve blades are sequentially arrayed in the same direction. The sieve tube has the advantages of reasonable structure, easiness for processing and manufacturing, large seepage area, high sand blocking precision, good anti-blockage effect, high pressure bearing strength and long service life and can be used for extracting liquid with a large discharge quantity and pumping out dust sand to increase the liquidity of liquid, thereby prolonging the extraction life of an oil well and reducing the production cost of oil extraction.

The invention discloses an online automatic sugar liquor brix measurement and control system. A plurality of sugar liquor tanks are respectively connected with 0-4 discharging pipes, feeding pipes, steam pipes and diluent pipes; a brix detector and a cleaning facility are mounted on each sugar liquor tank or the pipe thereof; a temperature sensor, a liquid level sensor and / or a flowmeter are mounted in each sugar liquor tank; a brix measurement and control mainframe is connected with the brix detector, the temperature sensor, the hydraulic sensor and the flowmeter of each tank to obtain the brix, temperature and pressure signals of each tank; the brix measurement and control mainframe is connected with electromagnetic valves on the pipes of the tank, as well as an electromagnetic switch and a cleaning control electromagnetic valve of a high-pressure thermal vapor generator of the brix detector; the brix detector is equipped with a connector, the lower end of which is fixed on the tank in a sealing manner; a prism is a quadrangular prism, the front and rear side surfaces of which are antiparallelograms. The online automatic sugar liquor brix measurement and control system has the advantages of automatically cleaning the sampling surface of the brix detector, ensuring the detection precision, automatically controlling the material temperature, the liquid level and the brix of each tank within optimal values and improving the quality and output of the sugar.

A single-degree-of-freedom spherical turnover mechanism comprises a first contra-parallelogram spherical unit (A), a second contra-parallelogram spherical unit (B) and a third contra-parallelogram spherical unit (C), and the first contra-parallelogram spherical unit (A) and the second contra-parallelogram spherical unit (B) are rotationally connected through a second connecting joint (A-2-3) and a third connecting joint (B-1-3) of a second bent rod (A-2) and a fifth bent rod (B-1). The second contra-parallelogram spherical unit (B) and the third contra-parallelogram spherical unit (C) are rotationally connected through a fourth connecting joint (B-2-3) and a fifth connecting joint (C-1-3) of a sixth bent rod (B-2) and a ninth bent rod (C-1), and the third contra-parallelogram spherical unit (C) and the first contra-parallelogram spherical unit (C) are rotationally connected through a sixth connecting joint (C-2-3) and a first connecting joint (A-1-3) of a tenth bent rod (C-2) and a first bent rod (A-1); the first, second and third contra-parallelogram spherical units (A, B and C) have the same structural composition, and the whole mechanism can realize spatial turnover motion.

The invention relates to a heat radiator and a manufacturing process of the heat radiator. The heat radiator comprises a heat radiator panel, and a heat radiator backboard, and is characterized in that the heat radiator panel is a rectangular slot having a rectangular orthogonal projection and an antiparallelogram cross section and an antiparallelogram longitudinal section; the heat radiator backboard is a rectangular slot having a bottom face smaller than the bottom face of the heat radiator panel and an edge folding angle the same as the edge folding angle of the heat radiator panel, convex ribs are arranged in parallel at an equal interval on the bottom face of the heat radiator backboard, the heat radiator backboard is arranged in the slot of the heat radiator panel, the convex ribs of the backboard bottom face contact and are fixed together with the bottom face of the panel, and the rabbet edge of the heat radiator panel and the rabbet edge of the heat radiator backboard are combined together so as to form a heat radiator liquid channel in the heat radiator; and a water pipe is arranged in the heat radiator liquid channel and a heating medium is filled in the heat radiator liquid channel. Advantages of the invention include good appearance, practicability, safety and durability, high heat radiating efficiency, simple manufacturing process, and high efficiency. The invention is suitable for large-scale flow line production.

The invention discloses a tight fitted aluminum housing and cover plate for a lithium ion battery, which comprises an aluminum housing and a cover plate, wherein grooves are formed at four corner angles on the inner side of the aluminum housing; bulges are arranged at four chamfers of the cover plate; the bulges and the grooves are in antiparallelogram straight rectangular pyramid frustum structures; and the bulges are fitted with the grooves. The aluminum housing and cover plate has the advantages that the aluminum housing and cover plate is lower in cost and simple in structure; the grooves at the corner angles on the inner side of the aluminum housing are fitted with the bulges at the corner angles of the chamfers of the cover plate; contact area and a stress direction of the aluminum housing and the cover plate are increased; a fit degree between the aluminum housing and the cover plate is increased; a welding yield of the aluminum housing and the cover plate is increased; the material cost is lowered; and the production efficiency is improved.

The invention discloses an automobile skylight sealing strip clamped connecting structure. The automobile skylight sealing strip clamped connecting structure comprises a glass PU wrapped edge and a sealing strip, wherein the sealing strip is connected to the glass PU wrapped edge; the cross section of the sealing strip is semicircular; a clamping head is arranged in the middle of a connecting end of the sealing strip and is in the shape of an antiparallelogram; a slot is formed in the connecting end of the glass PU wrapped edge; the shape of the slot corresponds to that of the clamping head; and an opening of the slot extends to form a fixing arm. The slot is formed in the glass PU wrapped edge, the clamping head is arranged on the sealing strip, and the slot and the clamping head are in clamped connection. The production process is simple, the automobile skylight sealing strip clamped connecting structure is assembled rapidly, the production efficiency is improved, and the cost is saved.

The invention aims to preserve objects conveniently at low cost for a long time. A permanent preservation bag is characterized in that a small plastic bag in antiparallelogram is sealed in a big plastic bag; the long side of the small plastic bag in antiparallelogram is sealed at the edge of the big plastic bag; and the short side of the small plastic bag in antiparallelogram is placed in the big plastic bag. The long side and short side of the small plastic bag in antiparallelogram are open and communicated and used as a sole passage for taking objects from the preservation bag and inflating the anti-corrosive gas. A sealing zipper is arranged at the opening of the long side of the small plastic bag in antiparallelogram and has double-seal function.

The invention relates to a peanut digging device based on a contra-parallelogram mechanism and a using method thereof. The peanut digging device comprises a rack; the front part of the rack is hinged to a first rocker which is driven by a driving mechanism to swing forwards and backwards in a reciprocating manner; an oblique digging shovel for shoveling up peanuts is fixedly arranged at the lower end of the first rocker; the upper part of the first rocker is hinged to a connecting rod; the other end of the connecting rod is hinged to a second rocker of which the upper part is hinged to the rear part of the rack; the contra-parallelogram mechanism is formed among the first rocker, the connecting rod and the second rocker rod; the lower end of the second rocker rod is connected with a vibrating screen positioned at the rear side of the oblique digging shovel; a depth-limiting wheel assembly capable of being ascended and descended for regulation is also arranged at the rear end of the rack. The peanut digging device not only is simple and compact in structure, but also reduces vibration of machinery when implementing separation of peanuts and soil blocks.

A nut correcting device is characterized in that a downward-sunken antiparallelogram lower die groove is formed in the upper face of a lower seat die, and the oblique edge of the lower die groove is equal to the lower bottom edge of the lower die groove; an upward-sunken antiparallelogram upper die groove is formed in the lower face of an upper pressing die, and the oblique edge of the upper die groove is equal to the upper bottom edge of the upper die groove; and an orthohexagonal die cavity is formed by the upper die groove and the lower die groove. The nut correcting device solves the problem that a nut no-go gauge does not stop and consequently waste is caused, and is particularly suitable for correcting a nut.

Disclosed is a nut correcting device. The nut correcting device is characterized in that the upper face of a lower seat die is provided with a downward-concave antiparallelogram lower die groove; the inclined edges of the lower die groove are equal to the lower bottom edge of the lower die groove; the lower face of an upper pressing die is provided with an upward-concave antiparallelogram upper die groove; the inclined edges of the upper die groove are equal to the upper bottom edge of the upper die groove; and a regular hexagon die cavity is formed by the upper die groove and the lower die groove. Through the nut correcting device, the problem that waste is caused by the non-stopping no-go gauge of a nut is solved, and the nut correcting device is especially suitable for being used for nut correcting.

A multi-functional air inflation lower limb abduction pillow is characterized by comprising a ladder-shaped pillow and a lower limb cushion. The ladder-shaped pillow comprises an antiparallelogram pillow body made of a flexible material and a fixing belt arranged on the antiparallelogram pillow body. Grooves with arc-shaped sections are arranged on two lateral walls of the antiparallelogram pillow body, and the sizes of the grooves are matched with those of human body lower limbs. The lower limb cushion comprises a base pad matched with the human body lower limbs and a vertical pad arranged outside the base pad, and an inner side of the vertical pad is in a shape of an inner concave arc face matched with the outside of the human body lower limbs. Compared with the prior art, the multi-functional air inflation lower limb abduction pillow has the advantages that during use, portions below knee joints are not easy to move, the pillow is comfortable, and side effects are small.

The invention discloses a foldable protection device convenient to use for bending over during sleep. The device includes a circular cushion body, the thickness of the cushion body is 3-6 cm, and thetexture of the cushion body and a filler in the cushion body both adopt an antibacterial cotton fabric capable of assisting in sleep; a vent hole is formed in the cushion body, and a cloth cover is arranged on the cushion body; the shape of the vent hole is in an oval shape matched with the facial part of the human body, the cloth cover is in an antiparallelogram shape after being laid flat, a rowof convex pressing buckles are arranged on the top of one surface of the cloth cover, and a row of concave pressing buckles are arranged on the top of the other surface of the cloth cover, wherein the convex pressing buckles are matched with the concave pressing buckles to form a small space capable of wrapping the ears and the cheeks; a connecting rod is arranged on the lower portion of the cushion body and used for being connected with a universal hose, the universal hose is composed of a silicone tube and a tenacious magnesium aluminum alloy filling the interior of the silicone tube, and asucker is mounted on the lower portion of the universal hose. The device is convenient, foldable, resistant to bacteria and capable of assisting in sleep, taking care of the facial part and arm joints and meeting the demands of people from various groups for an afternoon nap to the greatest extent.

A multi-functional air inflation lower limb abduction pillow is characterized by comprising a ladder-shaped pillow and a lower limb cushion. The ladder-shaped pillow comprises an antiparallelogram pillow body made of a flexible material and a fixing belt arranged on the antiparallelogram pillow body. Grooves with arc-shaped sections are arranged on two lateral walls of the antiparallelogram pillow body, and the sizes of the grooves are matched with those of human body lower limbs. The lower limb cushion comprises a base pad matched with the human body lower limbs and a vertical pad arranged outside the base pad, and an inner side of the vertical pad is in a shape of an inner concave arc face matched with the outside of the human body lower limbs. Compared with the prior art, the multi-functional air inflation lower limb abduction pillow has the advantages that during use, portions below knee joints are not easy to move, the pillow is comfortable, and side effects are small.