30 results about "Sunken face" patented technology

The invention discloses an automobile fuel tank which is low in cost. An upper tank body and a lower tank body are connected firmly and stably. The occupied vehicle interior space is small after a fuel pump and a turning-over valve are installed. The fuel tank comprises the upper tank body and the lower tank body arranged on the lower side of the upper tank body. The upper tank body and the lower tank body are made of metal materials respectively. An upper tank-closing ring edge is arranged on the portion, along the edge of the lower side, of the upper tank body. A lower tank-closing ring edge is arranged on the portion, along the edge of the upper side, of the upper tank body. The upper tank-closing ring edge and the lower tank-closing ring edge are matched and welded together in a rolling mode. The upper tank body is a concave casing with the front end and the rear end being protruding faces and the middle portion being a sunken face. The sunken face of the upper tank body is provided with a fuel pump installing flange and a turning-over valve installing flange. The upper tank body is further provided with an oil filling pipe and a ventilation pipe. The cost of the fuel tank is far smaller than that of a plastic fuel tank. The upper tank body and the lower tank body are connected firmly and stably, and influence of vibration is small; due to the sunken face, the tail portion of the installed fuel pump and the tail portion of the turning-over valve are prevented from protruding or protruding excessively.

The invention relates to an LED illumination device, in particular to an LED light source module comprising an LED light emitting module and a module base. The LED light source module is characterized by also comprising an optical cover plate which is fixedly arranged on the module base to define a closed space, wherein the LED light emitting module is arranged in the closed space; the outer surface of the optical cover plate is a plane or a smooth arc surface; the inner surface of the optical cover plate is provided with a plurality of inner sunken faces; the LED light emitting module is provided with a plurality of LED illuminants, an inner sunken face is correspondingly distributed at the front of each LED illuminant. The invention provides an LED light source module which is simple in structure and convenient to use.

A method and apparatus calculate resistance of a three-dimensional conductor system defined by boundary faces. The resistance calculation includes (a) partitioning the three-dimensional shape into a plurality of parallelepipeds, a boundary between two parallelepipeds forms and entire face for both of the two parallelepipeds, (b) determining at least one source face and at least one sink face from among the boundary faces, a current entering the conductor system through the source face and leaving the conductor system through the sink face, (c) setting boundary conditions with respect to the current for each of the parallelepipeds, (d) calculating power for each of the parallelepipeds with the boundary conditions, (e) calculating power for the conductor system based on the power and the boundary conditions of each of the parallelepipeds, and (f) obtaining the resistance of the conductor system by minimizing dissipation of the calculated power of the conductor system.

The invention discloses a multifunctional spinning frame which comprises a yarn feeding device, a yarn guide device, a drafting device and a winding device, wherein the yarn feeding device comprises a yarn holder, two rows of suspended spindles arranged on the yarn holder, and a yarn guide rod which is arranged on the yarn holder and is positioned between the two rows of suspended spindles; the yarn guide device comprises a yarn guide roller, a cradle and yarn guide wheels; the drafting device comprises a front roller, a middle roller, a rear roller and an output roller; the yarn guide device also comprises a dual-opening horn mouth and a single-hole horn mouth; the drafting device also comprises a spindle transmission mechanism; the spindle transmission mechanism comprises a spindle, a spindle disc and a photoelectric inductor; a first suction pipe with two inner sunken faces is arranged between the front roller and the output roller; and a second suction pipe is connected to the inlet of the first suction pipe and is connected to a suction ventilator. According to the spinning frame disclosed by the invention, multiple spinning methods can be combined, the process change operation process is simple, and the process change time is greatly shortened.

The invention provides a forklift wheel retaining ring structure and a machining technology thereof. The outer side of a retaining ring of the forklift wheel retaining ring structure comprises a vertical outer face and a circular arc outer face which are integrally formed; the inner side of the retaining ring comprises a vertical inner face, a protrusion and a sunken face which are integrally formed; and the vertical outer face is connected with the vertical inner face through a bottom face. The machining technology of the forklift wheel retaining ring comprises the steps of profile steel rolling, straightening, scribing, edge coiling, cutting-off, close-up and spot welding, butt welding, slag milling and pressing. The forklift wheel retaining ring structure is not prone to deforming whenbearing force, and a locking ring is prevented from popping up; and the material utilizing rate of the machining technology of the forklift wheel retaining ring reaches 95% or above, and the production efficiency is improved by 30%.

The invention discloses a direct-descend type LED light source module, a backlight module and a display panel. The direct-descend type LED light source module comprises a transparent base material, an LED light source and a reflector element of a sunken face structure on one side in the direction of the LED light source; the LED light source is arranged on one side of the transparent base material in the direction of the reflector element and is located at the focus point of the reflector element, a spread structure is arranged on the internal side of the transparent base material and / or the surface of the transparent base material. By the direct-descend type LED light source module, before the ray of light gets into a diffuser plate, pre-homogenizing treatment is conducted on the LED light source by the reflector element, hence, low haze diffuser plates can be worked with, and light issuing efficiency is further increased. In addition, because the light source shows the parallel light after the reflection, the proportion of light diffused to a larger viewing angle is lowered, the light intensity facing squarely the angle can be improved, and the spread structure arranged on the transparent base material offsets the rays of light stopped by the fixing point of the LED light source. Hence, by the direct-descend type LED light source module, the brightness of the display can be improved by design, and the energy-saving effect is achieved.

The invention provides a pressing die for a welding neck flange. The pressing die comprises an upper forming die, a lower forming die and an expanding ball. The upper forming die and the lower forming die are vertically buckled, and the expanding ball is used for expanding. A cavity of the welding neck flange is defined by the upper forming die and the lower forming die. A core rod is arranged in the center of the end face of one end of the upper forming die. An inwards-sunken face matched with the ball surface of the expanding ball is arranged at the tail end of the core rod. In the process for pressing the welding neck flange through the die, selected raw materials are blanked and placed in a performing die for pre-forging forming, the pre-forged and formed welding neck flange is placed in the lower forming die of the die, the core rod of the upper forming die jacks and vertically presses the expanding ball, an inner hole of the welding neck flange is expanded, the length of the neck of the flange is increased, after pressing is finished, the welding neck flange is subjected to finish turning, and a finished product is obtained. The welding neck flange is manufactured through the die and the process, the forming process is simple, the forming appearance is good, the machining allowance is small, the mechanical property is excellent, the organization structure is uniform, and the defects of cast flanges and wholly-forged flanges can be overcome.

The invention relates to an LED total-reflection lens and an LED line source. The LED total-reflection lens is an integrated polyhedron of which the main body outline consists of a cuboid, as well as an upper 180-degree half circular truncated cone and a lower 180-degree half circular truncated cone which fit the front middle part of the cuboid and are of the same size, the lower bottom surfaces of the two half circular truncated cones completely fit each other, the upper bottom surfaces of the two half circular truncated cones are flush with the top surface and the bottom surface of the cuboid correspondingly, a total-reflective chamfer is arranged on each of the left side and the right side of the front face of the cuboid, a light incident plane and a reflective inner sunken face are formed in the centers of the top surface and the bottom surface of the polyhedron relatively and separately, a refraction hole is further formed in the cuboid, one or more through-hole total-reflection planes are formed between the refraction hole and each of the two chamfers on the left side and the right side, and the rear face of the cuboid is a light outgoing plane. The LED total-reflection lens can uniformly distribute Lambert-emitted LED light to achieve a uniform linear visual effect, and is high in light energy utilization ratio. The LED line source can achieve a longer-distance and uniform linear lighting effect by use of fewer LEDs.

The embodiment of the invention provides a heat-insulated aluminum alloy door and window. The heat-insulated aluminum alloy door and window comprises a window frame, a first window body, a second window body and a third window body, wherein the first window body, the second window body and the third window body are installed in a window body, the first window body is in an arc shape, the second window body is further in an arc shape, the sinking direction of the second window body is the same as the sinking direction of the first window body, the first window body sinks facing the second window body, a vacuum thermal insulating layer is formed between the second window body and the first window body, and an accommodating cavity is formed between the third window body and the second windowbody. According to the heat-insulated aluminum alloy door and window, the arc-shaped first window body and the second window body are used, rays of light can be dispersed, so that energy taken indoorsby sun illumination is reduced, speed of indoor warming is further slowed down, the vacuum thermal insulating layer formed between the first window body and the second window body can well prevent indoor and outdoor heat exchange, the accommodating cavity between the second window body and the third window body can accommodate liquid to cool indoors, and thus the effect of heat insulation is achieved.

The invention discloses an optical fiber indicator light comprising an optical fiber and a light guide structure. The light guide structure comprises a channel and an air chamber which is connected with the channel, wherein, the optical fiber is received in the channel, and an optical fiber endpoint of the optical fiber is arranged in the air chamber. The light guide structure is provided with a luminous surface and a sunken surface, wherein the sunken surface faces to the air chamber, and light emitted by the optical fiber is diffused outward through the sunken face of the light guide structure so as to improve a visual area of the optical fiber.

The invention discloses a badminton insole. The badminton insole comprises an insole body, the insole body sequentially comprises an insole forefoot, an insole pad core, an insole waistline and an insole heelpiece from front end to back end of the insole body. 15-50 suckers with arc-shaped sunken faces on the tops are arrayed on the upper side of the insole forefoot, 6-12 wave line-shaped groovesare formed in each of the transverse direction and the longitudinal direction between the suckers, and a forefoot shock-absorption pad is arranged on the lower side of the insole forefoot; a pad coreshock-absorption pad is arranged on the lower side of the insole pad core; 6-20 transverse wave line-shaped grooves are sequentially formed in each of the upper side of the insole pad core, the upperside of the insole waistline and the upper side of the insole heelpiece; the two sides of the insole waistline are warped upwards, and a waistline pad block which surrounds the whole insole waistlineis arranged on the lower side of the insole waistline. Feet and the insole can be fitted stably, sliding does not easily occur, the effects of shock absorption and foot protection are high, stress fatigue generated by motion, walking and standing can be relieved, the effects of perspiration, air exhausting and odor removal are good, and the badminton insole has the excellent properties of elasticity and refreshing.

The invention provides an adjustable solar rainwater collecting pool and a control method thereof. The adjustable solar rainwater collecting pool comprises a pool body, a storage battery and a plurality of plates, one end of the pool body is open, each plate is shaped like a circular-arc-shaped sheet, the side, facing the upper part, of each plate is an inwards sunken face, the side, facing the lower part, of each plate is an outwards convex face, flexible solar cell panels are fixedly arranged on the inwards sunken face, one ends of the plates are hinged to the edge of the open end of the pool body through hinge shafts, the other ends of the plates extend outwards, and the flexible solar cell panels and the storage battery are electrically connected. The control method comprises the stepthat the angles between the plates and the horizontal plane are adjusted according to the change of weather information. By adopting the technical scheme, according to the weather situation, a drivingmotor drives the plates to be turned over, thus the angles between the plates and the horizontal plane are changed in real time, and the effects that rainwater and sunlight are fully collected, the adjustable solar rainwater collecting pool is prevented from being scoured by rain and snow, and stable and reliable working of the adjustable solar rainwater collecting pool is ensured are realized.

The invention discloses a root irrigation device. The root irrigation device comprises a body with a cavity. The body is provided with a water inlet and a water outlet. The root irrigation device is characterized in that the upper surface and the lower surface of the body are arc-shaped pressure-bearing surfaces, and the cavity is provided with a sunken arc-shaped bottom. Because the upper surface and the lower surface of the body are the arc-shaped pressure-bearing surfaces, a clam-shaped bionic structure is adopted to place the root irrigation device under soil flat in a buried mode, and the root irrigation device can keep shaping and locating stability with morphological features of itself; when external pressing mechanical pressure is applied above the soil, the root irrigation device can achieve the mechanical decomposition effect effectively and can also dissolve bottom opposite acting force caused by the pressure above the soil. The cavity is provided with the sunken arc-shaped bottom matched with the arc-shaped pressure-bearing surfaces, the sunken arc-shaped bottom can be used for storing a small amount of water and fine sand, and therefore the root irrigation device has the functions of soil moisture conservation and blockage prevention.

The invention relates to the field of bed supplies, and discloses a bed assembly realizing comfortable side lying. The invention provides the bed product capable of protecting the arms from being pressed when the human body is in the side lying posture, namely, a sinking face or concave space at the bed touching area of the arms is reserved on the bed face, so that when people sleep on the side orlovers sleep in a hugging manner, the arms touching the bed sink in the bed face more than the other parts of the body, therefore, the pressure suffered by the arms touching the bed can be alleviated, the normal circulating of the blood of the arms can be guaranteed, the risk that the arms touching the bed are injured is avoided, then the side-lying comfort and sleep quality are promoted, and even scapulohumeral periarthritis can be prevented or alleviated.

The invention discloses a fluid guide plate and a plate heat exchanger thereof. The fluid guide plate comprises a first heat exchange surface, a second heat exchange surface and a plurality of heat exchange parts, wherein the first heat exchange surface is sunken facing the second heat exchange surface to form the heat exchange parts, and the heat exchange parts are arranged on the second heat exchange surface in a protruding manner; and each heat exchange part has a polygon shape. The plate heat exchanger comprises a plurality of the fluid guide plates, and the heat exchange parts on the adjacent fluid guide plates are mutually staggered to form a runner system, so that the heat exchange parts can allow fluids to vigorously flow in the runner system to form a longitudinal eddy current, strong turbulence is generated, the heat transfer efficiency of fluids is improved, and the pressure drop is reduced; and besides, through the adoption of the fluid guide plate, the mold development can be greatly reduced, and the production cost is reduced.

The invention relates to the field of commercial ice making and discloses an ice maker ice mold and an ice maker comprising the same. The ice maker ice mold comprises a plurality of heat exchanging pipes, icing face sets on the two sides of the heat exchanging pipes, a plurality of rib partition plates which are arranged on the icing face sets in the horizontal direction at equal intervals, and heat exchanging faces which are arranged on the icing face sets in the vertical direction at equal intervals. Each icing face set comprises icing faces which are symmetrically arranged on the two sidesof the corresponding heat exchanging pipe, and the heat exchanging faces are arranged on the icing faces and formed by inner sunken faces or planes or combined connection of the inner sunken faces andthe planes. The heat exchanging pipes are arranged in the middles of the symmetrical heat exchanging faces in the horizontal direction and fixedly connected with the heat exchanging faces. The heat exchanging area during ice forming is greatly increased, the heat exchanging efficiency is improved, thus energy consumption of the ice maker is reduced, and the energy is saved accordingly.

The invention relates to an ultralow-energy-consumption building curtain wall frame profile device and a manufacturing method thereof. The device comprises an inner frame profile (1), a middle fireproof heat-insulation connecting profile (2), a threaded glass fiber rib (3), a fixing connecting block (4) and a fastening nut (5); the inner frame profile (1) is a metal integral component formed by one-time machining, and a mounting connecting notch (11) is formed in the middle of a sunken face; the middle fireproof heat-insulation connecting profile (2) is a glass fiber reinforced polyurethane resin integral component formed by one-time extrusion, the cross section of the middle fireproof heat-insulation connecting profile (2) is square, and the inner end of the middle fireproof heat-insulation connecting profile (2) is inserted into the mounting connecting notch (11); and the threaded glass fiber rib (3) penetrates through the inner frame profile (1) and the middle fireproof heat-insulation connecting profile (2) to conduct fastening, supporting and connecting. The device and the method have the advantages that the fireproof heat-insulation performance is high, the mechanical connection strength is high, the bearing performance is high, the structure is simple and novel, the production and manufacturing process is simple and mature, and the production cost is low.

The invention discloses a heat sink strip of a PTC heat-sensitive material heating device, and the heat sink strip comprises a heat dissipation ripple clamped by a heat-conducting flat piece and an edge folded locating heat-conducting fin, the heat dissipation ripple simultaneously comprises a sunken face and a fanned face in altitude direction, and the sunken face and a corner folded face are perpendicular to a width direction of the heat dissipation ripple; and the heat dissipation ripple is formed by an aluminum strip being rolled and compacted through a pair continuous engaged gears of a rolling gear machine. Meanwhile, the invention also discloses a PTC heat-sensitive material heating device using the heat sink strip and a special electrical appliance. According to the heat sink stripprovided by the invention, by the design of the heat-dissipation ripple face, trace amount of water drops can be accumulated and accommodated in the sunken or corner folded face and cannot be blown away instantaneously after secondary starting up, with instantaneous heating of the heating device, trace amount of condensed water drops is immediately heated and volatilized, service environment is improved effectively, strength of the heat sink strip and a PTC heater is improved, and usage reliability and environmental-protection functions of the PTC heater and the electrical appliance are improved.

The invention relates to an LED illumination device, in particular to an LED light source module comprising an LED light emitting module and a module base. The LED light source module is characterized by also comprising an optical cover plate which is fixedly arranged on the module base to define a closed space, wherein the LED light emitting module is arranged in the closed space; the outer surface of the optical cover plate is a plane or a smooth arc surface; the inner surface of the optical cover plate is provided with a plurality of inner sunken faces; the LED light emitting module is provided with a plurality of LED illuminants, an inner sunken face is correspondingly distributed at the front of each LED illuminant. The invention provides an LED light source module which is simple instructure and convenient to use.

The invention discloses a direct-descend type LED light source module, a backlight module and a display panel. The direct-descend type LED light source module comprises a transparent base material, an LED light source and a reflector element of a sunken face structure on one side in the direction of the LED light source; the LED light source is arranged on one side of the transparent base material in the direction of the reflector element and is located at the focus point of the reflector element, a spread structure is arranged on the internal side of the transparent base material and / or the surface of the transparent base material; the reflector element is the Fresnel reflector. By the direct-descend type LED light source module, before the ray of light gets into a diffuser plate, pre-homogenizing treatment is conducted on the LED light source by the reflector element, hence, low haze diffuser plates can be worked with, and light issuing efficiency is further increased. In addition, because the light source shows the parallel light after the reflection, the proportion of light diffused to a larger viewing angle is lowered, the light intensity facing squarely the angle can be improved, and the spread structure arranged on the transparent base material offsets the rays of light stopped by the fixing point of the LED light source. Hence, by the direct-descend type LED light source module, the brightness of the display can be improved by design, and the energy-saving effect is achieved.

The invention provides an automobile rear floor structure which can effectively solve the problems that an automobile rear floor is poor in rigidity and strength and likely to deform and crack, resonance is likely to happen, and the NVH performance is reduced. The structure comprises an upper surface, a U-shaped sunken face recessed downwards in parallel from the upper surface and a side verticalface connecting the upper surface with the sunken face, the position located on the inner side of the side vertical face is a stepped boss, and reinforcing ribs are arranged on the side vertical face,the sunken face and the stepped boss. The rigidity of the automobile rear floor can be effectively improved, stress concentration can be reduced, each type of use performance of the structure is improved, and therefore the reliability, the safety and the comfort level of a whole automobile are improved; and the structure is reasonable in arrangement, stable, firm, technologically easy to achieve,low in cost, wide in universality and higher in market competitiveness.

The invention discloses a rapid-assembling-type ceiling plate and a construction technology thereof. The rapid-assembling-type ceiling plate comprises a decorative plate and a ceiling accessory; the ceiling accessory is composed of a wood keel which is formed by integrated processing of a wood material; and one end of the wood keel is fixedly connected to a ceiling wall, and the other end of the wood keel bears the decorative plate to constitute a ceiling. Clamping tables are processed on the decorative plate, bosses are processed on the wood keel of the ceiling accessory, and the inwards sunken faces of the bosses are matched with the clamping tables so that the decorative plate can be rapidly borne in the ceiling accessory, and the bearing positions of the clamping tables and the bossesare filled with sealants for being further fixed; meanwhile, bolts are fastened on the bosses, the other ends of the bolts are fixed into a ceiling wall body, thus the ceiling is rapidly constructed and mounted, and the construction efficiency of ceiling decoration is improved; and compared with a traditional construction technology, the problems that the overall space is non-uniform in the visualeffect, mounting steps are complex, more types of work exist, and consequently, mounting is inconvenient, and long time is consumed are avoided.

The invention discloses a hydraulic torque wrench which comprises a ratchet mechanism and a loading mechanism. The loading mechanism comprises a hydraulic cylinder piston. The ratchet mechanism comprises a driving plate. The end face of the head of the extending end of the piston is a spherical segment concave face. The end face of the stressed end of the driving plate is a longitudinal circular arc convex face. A spherical segment rotating base is installed between the extending end of the piston and the stressed end of the driving plate. The bottom face of the rotating base is an inner sunken face. The spherical radius of the rotating base is equal to the radius of the spherical segment concave face. The radius of the inner sunken face is equal to the radius of the circular arc convex face. The spherical face of the rotating base is in sliding fit with the spherical segment concave face of a piston rod. The inner sunken face is in sliding fit with the circular arc convex face of the driving plate. A connecting piece for keeping linkage among the piston, the rotating base and the driving plate is installed between the piston and the driving plate. Under the conditions that axial thrust of the piston is changeless, the torque value output by the wrench is constant no matter which position the piston moves to, and the torque output precision of the hydraulic torque wrench is quite high.

The invention discloses a processing method of FRP parts, at least comprising: taking the R-shaped surface center of the part to be processed as a dividing line to divide the R-shaped surface into two parts for symmetrical processing; processing the sunken surface, R The surface and the conical surface of the connection part; processing the inclined surfaces at both ends of the first part of the part to be processed; processing the sunken surface, the R-shaped surface and the conical surface of the connection part of the second part of the part to be processed; processing the part to be processed The bevels at both ends of the second part of the part require that the two ends of the two processes be flattened. Taking the center of the R-shaped surface of the part to be processed as the dividing line, the R-shaped surface is divided into two parts for symmetrical processing, and the two ends of the processing are guaranteed to be flat. Slag, thereby improving the processing effect of parts.

The invention discloses a fluid guide plate and a plate heat exchanger thereof. The fluid guide plate comprises a first heat exchange surface, a second heat exchange surface and a plurality of heat exchange parts, wherein the first heat exchange surface is sunken facing the second heat exchange surface to form the heat exchange parts, and the heat exchange parts are arranged on the second heat exchange surface in a protruding manner; and each heat exchange part has a polygon shape. The plate heat exchanger comprises a plurality of the fluid guide plates, and the heat exchange parts on the adjacent fluid guide plates are mutually staggered to form a runner system, so that the heat exchange parts can allow fluids to vigorously flow in the runner system to form a longitudinal eddy current, strong turbulence is generated, the heat transfer efficiency of fluids is improved, and the pressure drop is reduced; and besides, through the adoption of the fluid guide plate, the mold development can be greatly reduced, and the production cost is reduced.

The embodiment of the invention provides a three-dimensional metal outer cup and a manufacturing method. The three-dimensional metal outer cup comprises a cup body and an outer casing sleeving the cupbody; the cup body is fixedly connected with the outer casing; the cup body is of a bowl-shaped structure, the inwards-sunken face of the cup body fits the shape of an outer cup lining, and the face,away from the outer cup lining, of the cup body fits the outer casing; and the outer casing is of a bowl-shaped structure, the inwards-concave face of the outer casing fits the cup body, and the face, away from the cup body, of the outer casing fits the shape of the acetabulum side of a patient. Through the three-dimensional printed outer casing, the outer casing is matched with the acetabulum side of the patient, so that excision rate of more high-quality bone is reduced. The central dislocation caused by long-term looseness caused by excessive bone loss of the patient is prevented, the survival rate of the metal outer cup is improved, and the matching degree is improved.

The invention relates to an external thermal insulation cement decoration panel provided with a covered channel type rigid sealing joint serving as a vertical joint and an assembling method thereof. The external thermal insulation cement decoration panel is characterized in that the cement decoration panel is internally provided with a metal or non-metal net; a three-dimensional decorative pattern is preformed on the outer side face of the cement decoration panel; the upper end face of the cement decoration panel is provided with a full-length convex key and metal hanging parts spaced by a certain distance, and the lower end face of the cement decoration panel is provided with a groove; the inner sides of the two side end faces are sunken inwards to form an exterior-high and interior-low step shape; and perforated metal plate strips are embedded in the sunken faces. During construction and assembly of the cement decoration panel, a sunk key type joint serves as a horizontal joint, and the covered channel type rigid sealing joint serves as the vertical joint. The gap of the joint is small, the decorative pattern at the joint can be successive so that a big integral three-dimensional pattern can be presented. The sunk key type horizontal joint has good permeability, and the covered channel type rigid sealing joint has good anti-cracking and anti-leakage performance.

The invention discloses a decorative board with good thermal insulation and sound insulation effect, which comprises an upper protective board and a lower protective board, an upper thermal insulation board is arranged on the lower side of the upper protective board, and a lower thermal insulation board is arranged on the upper side of the lower thermal insulation board , the lower side of the upper insulation board is provided with a substrate, the lower side of the substrate is provided with a sound insulation board, the lower side of the sound insulation board is provided with a melamine board, and the upper side of the melamine board is provided with an arc-shaped concave surface , the arc-shaped concave surface is provided with a plurality of arc-shaped grooves, the lower side of the melamine board is connected with the lower insulation board, and several hollows are arranged on the upper insulation board and the lower insulation board, and the interior of the hollows is filled with light quality foamed organic material. The invention has the advantages of simple structure, convenient use, good sound insulation effect and strong thermal insulation performance, and meets the use requirements of modern people.