108results about How to "Smooth structure" patented technology

The invention discloses an open-web area structure for a concrete open-web continuous rigid frame bridge, which comprises an upper chord beam section and a lower chord beam section, the upper chord beam section is horizontally arranged, the lower chord beam section is positioned below the upper chord beam section, and the lower chord beam section is of an arc-shaped structure arched towards the upper chord beam section; the lower chord beam section is obliquely arranged and forms an integral box beam with a convergence node of the upper chord beam section; the upper chord beam section comprises a top plate and at least one upper chord web which is vertically connected below the top plate; the lower chord beam section comprises a bottom plate and lower chord webs, the number of the lower chord webs is the same as that of the upper chord webs, the upper chord webs are vertically connected to the upper portion of the bottom plate correspondingly, and the upper chord webs and the lower chord webs are connected into a whole at a convergence node through arc transition. The structure is simple, construction and stress transition are smooth, the manufacturing cost is low, construction is convenient, and durability is good.

The invention provides a monocrystalline silicon wafer texturing structure of a solar cell, a texturing additive, a texturing solution, a texturing method and the solar cell. The texturing additive comprises 0.01-0.1 wt% of a nucleating agent, 0.03-0.5 wt% of a surface forming agent, 0.06-1 wt% of a tower surface etching agent, 0.1-1 wt% of a dispersing agent, 5-20 wt% of a defoaming agent and the balance of deionized water. The nucleating agent is benzene ring-containing polyoxyethylene ether, the tower surface etching agent is a vinyl pyrrolidone copolymer, the nucleating agent forms hydrogen bonds with Si-OH on the surface of an SDR silicon wafer by virtue of EO chain segments and benzene rings, and the hydrogen bonds are adsorbed on the flat surface of the silicon wafer to form nucleating points. And after the pyramid is formed, the nucleating agent at the spire is separated from the spire and loses protection on the spire, the surface forming agent can still protect the surface of the tower due to relatively strong adsorption, and the spire is slightly corroded, the spire is smooth and the height-width ratio of the pyramid is reduced due to continuous corrosion of alkali liquor. The tower surface etching agent is subjected to ester hydrolysis due to alkali and high temperature, so that the water solubility of the copolymer is improved; and the tower surface etching agent is adsorbed on the tower surface by virtue of the long chain segment of the copolymer, and is continuously corroded at the tower surface to form a slight gully type tower surface.

The invention belongs to the field of mining equipment and is a crushing coal mining equipment. The crushing coal mining equipment includes a chassis, a power chamber is provided in the lower side wall of the chassis, a power device is provided in the power chamber, and the power device is used to provide movement for the crushing coal mining equipment. A rotating table is provided on the upper side wall of the chassis, and a mining device is provided on the rotating table. The mining device is used to knock down and crush the coal that has been consolidated on the mine wall. The invention is simple to operate, and can remotely control coal mining without the need for personnel to operate on site, thereby protecting the lives of miners. It can be crushed in a wide range at multiple angles. A crushing device is installed in the shovel plate, and the collected coal can be further crushed for easy transportation. A cooling device is installed to avoid sparks and explosions during the crushing process. It is small in size and adopts a crawler structure. The overall structure is flat, which is conducive to working in narrow and rugged areas.

According to the phosphogypsum-waste concrete composite cementing material for the road and the preparation method of the phosphogypsum-waste concrete composite cementing material, waste concrete recycled powder and phosphogypsum are compounded for use, and the multi-level process synergistic effect of specific microbiota treatment, airflow suspension aggregate, a modifier and the like is achieved; and the micro powder is obviously changed in particle morphology, chemical activity and structural characteristics. The obtained cementing material is more uniform in particle, smooth in surface and more compact in structure, and impurities are reduced; the internal potential volcanic ash activity is excited, the chemical activity is obviously improved, and the material can better participate in hydration reaction; more stable and firmer combination with other road building materials is formed, and the durability and mechanical property are remarkably enhanced, so that the overall stability and the service life of a road are improved, and the cement is completely replaced to be applied to road engineering. And meanwhile, the reduction and recycling application of the phosphogypsum and the waste concrete regenerated powder is realized.

The invention discloses a thermal insulation multiphase ceramic fiber aerogel used in an ultrahigh temperature environment of 1800 DEG C and a preparation method of the thermal insulation multiphase ceramic fiber aerogel. The preparation method comprises the following steps: mixing basic zirconium carbonate, glacial acetic acid and a yttrium source according to a specific molar ratio to prepare a zirconium precursor solution; the preparation method comprises the following steps: adding an aluminum source and a silicon source into a solvent according to a specific molar ratio, completely dissolving to obtain a silicon-aluminum solution, condensing and refluxing until the solution is completely clarified to prepare a silicon-aluminum precursor solution, mixing the silicon-aluminum precursor solution with the silicon-aluminum precursor solution according to a specific molar ratio, solating to obtain a zirconium-silicon-aluminum ternary sol, adding a spinning aid into the zirconium-silicon-aluminum ternary sol to obtain a zirconium-aluminum-silicon ternary spinning solution, and carrying out spinning on the zirconium-silicon-aluminum ternary spinning solution to obtain the zirconium-silicon-aluminum ternary spinning solution. And carrying out electrostatic spinning or centrifugal spinning on the zirconium-aluminum-silicon ternary spinning solution to obtain a zirconium-aluminum-silicon fiber aerogel precursor, collecting the zirconium-aluminum-silicon fiber aerogel precursor, heating to 1000-1300 DEG C, carrying out heat preservation, and cooling along with a furnace to obtain the aluminum oxide-zirconium oxide-mullite fiber ceramic aerogel with a three-dimensional structure. The aerogel prepared by the method is good in flexibility and has a good three-dimensional pore structure, and the fiber surface is smooth.

The utility model relates to a combined structure of an implicit steel cover beam and an implicit telescopic device structure. The combined structure comprises an implicit cover beam (10), a main beam bracket (20), a support system (30), a limiting device (40) and an implicit telescopic device (50). The longitudinal bridge direction of the hidden cover beam (10) is consistent with the line shape of the main beam, the main beam is slotted to form two symmetrical main beam brackets (20), and the main beam brackets (20) are lapped on the hidden cover beam (10). And the main beam bracket (20) is limited by a limiting device (40). And the brackets are connected through hidden telescopic devices (50). The device is suitable for urban steel structure bridges, and effectively solves the problems that an existing bent cap is poor in attractiveness and economical efficiency, and an existing expansion joint structure is exposed on a bridge floor and poor in comfort.

The application relates to the air conditioning technical field and discloses an indoor unit and an air conditioner. The indoor unit comprises a shell, an air duct formed in the shell, an air inlet and an air outlet, and the air duct is communicated between the air inlet and the air outlet; a heat exchanger located in the air duct; a cross-flow fan located in the air duct, the cross-flow fan comprising a motor; wherein a side wall of the air duct is provided with an exhaust passage communicated with the air duct, the shell is further provided with a heat dissipation passage, the heat dissipation passage is located outside the air duct and is communicated between the exhaust passage and the motor, and airflow in the air duct can flow to the motor through the exhaust passage and the heat dissipation passage. The airflow in the air duct has certain kinetic energy and temperature regulation, thereby providing continuous cooling effect for the motor, so that the heat dissipation efficiency of the motor is remarkably improved, and the service life of the motor is prolonged.

The utility model relates to the field of maintenance frame discloses a maintenance frame for lifting type industrial robot, including base, the top of base is provided with lifting assembly, the top fixed connection of lifting assembly has fixed platform, both sides of fixed platform all are fixedly connected with two connecting frames, the left side fixed connection of connecting frame has support frame, the bottom rotatory connection of support frame has support rod, the other end rotatory connection of support rod has support screw rod, the other end fixed connection of support screw rod has driven rod, the middle rotatory connection of driven rod has fulcrum rod, the side fixed connection of driven rod has adjusting rod. In the utility model, enhance platform stability, this design operation is simple, compact structure, can fixedly spread of extension board fast, is applicable to industrial maintenance scene etc, has the advantages such as smooth unfolding, locking reliable, strong bearing capacity, effectively promotes work efficiency and security.

The utility model relates to the related technical field of food detection, and discloses a pulp sampler for food detection, which is characterized in that a placing cavity is arranged in a placing cylinder, a clamping device and a sampling device are arranged in the placing cavity in a sliding manner, the clamping device comprises a placing plate, a plurality of sliding grooves are formed in the upper surface of the placing plate in an annular array manner, and the sampling device is arranged in the placing cavity. Sliding blocks are slidably installed in the sliding grooves formed in the array, claw plates are fixedly installed on the upper surfaces of the sliding blocks, and spring ropes are connected to the lower ends of the sliding blocks arranged in the array. The cutting plate is slidably mounted on the surface of the side through groove, so that a regular and consistent opening can be cut in the surface of the orange, a standardized pulp sample can be obtained, the cutting plate can complete cutting of the upper layer surface of the orange through simple operation, and compared with manual peeling or cutting, the time is greatly saved, and the sampling efficiency is improved.

The utility model relates to the technical field of conducting rods, and discloses an outdoor high-voltage vacuum circuit breaker conducting rod, which comprises a rod body fixedly arranged in an outdoor high-voltage vacuum circuit breaker, and is characterized in that the rod body comprises a first rod piece, one end of the first rod piece is fixedly provided with a first external thread for installation, and the other end of the first rod piece is provided with a second external thread for installation; a second rod piece is fixedly connected to the other end of the first rod piece, second external threads are fixedly arranged on the second rod piece, and a third rod piece used for installation is fixedly arranged at one end of the second rod piece. According to the outdoor high-voltage vacuum circuit breaker conducting rod, the outer side of the conducting rod is provided with a plurality of external thread structures which are used for being connected and installed in the outdoor high-voltage vacuum circuit breaker, the actual installation process is simple in operation, the locking effect is good, the overall structure is smooth, production simplification is facilitated, and production efficiency is improved; and the traditional notch design on the conducting rod is eliminated, so that the processing difficulty is simplified, burrs on the conducting rod are avoided, the use safety of the conducting rod is improved, and the partial discharge problem of conduction is reduced.

The utility model relates to the technical field of cooking machines, in particular to a cooking machine pot cover with an inner cover not easy to fall off, which comprises the inner cover and an outer cover, and the outer cover is provided with a mounting hole. The inner cover sequentially comprises a coronal outer edge and a stuffing section from top to bottom; the crown-shaped outer edge is lapped on the outer cover, and the stuffing section is mounted in the mounting hole. The utility model has the beneficial effect that the inner cover can be prevented from falling downwards. The overall structure is simple and reasonable.

The utility model relates to the technical field of ring rolling machines, in particular to a vertical ring rolling machine for forging, which comprises a forging ring and a mounting frame, electric push rods are mounted on the outer walls of two sides of one side of the top of the mounting frame, and one end of a piston rod of each electric push rod is fixedly connected with a fixing block. Rectangular grooves are formed in the outer walls of the two sides of one side of the top of the mounting frame, supporting plates are fixedly connected to the inner walls of one sides of the rectangular grooves, U-shaped frames are slidably connected to the outer walls of the supporting plates, and second limiting frames are slidably connected to the inner walls of the two sides of one side of each U-shaped frame; when the forge piece ring is completely separated from the supporting block and the rolling structure, the forge piece ring directly falls under the action of gravity to complete blanking, the problems that the outside of the forge piece ring is not limited, part of the forge piece ring is prone to warping outwards in the supporting and rolling process, and the structure is not flat any more are solved, blanking is more convenient after the forge piece ring is rolled, and the production efficiency is improved. And the use efficiency of the vertical ring rolling machine is improved.

The utility model belongs to a three-dimensional hook rack which is used for hanging sundries in living, office, accommodation and other spaces of people. The fixing plate (4) of the three-dimensional hook rack is provided with a plate surface (17) which can be bonded by glue and is provided with a fixing hole (18), and a clamping sleeve (11) on the plate surface (17) is connected with the slide way (5). The wide clamping sleeve (11) for fixing the sliding pipe (5) is formed by folding a relatively wide stainless steel plate, and is simple, stable and attractive in appearance. An adjustable gap is reserved in the hanging plate (21) connected with the clamping sleeve (11), a thread for fixing the sliding pipe (5) can be fixed through a fixing screw, the clamping sleeve (11) and the sliding pipe (5) form an integrated structure, the width of the clamping sleeve (11) is three times that of the original clamping sleeve (11), and the clamping sleeve (11) and the sliding pipe (5) form an integrated stable structure through an adjusting device with two adjusting holes (19). The fixing plates (4) can be used independently and can also be used in a combined mode.

The utility model relates to the technical field of proportioning devices, in particular to a proportioning device for insulating paint production, which is characterized in that heating pipes are arranged on the inner wall of a feeding pipe and the inner wall of a tank body, a controller electrically connected with the heating pipes is arranged on the outer wall of the tank body, a driving wheel is fixedly arranged at the top of a first rotating shaft, and the driving wheel is connected with the heating pipes. A fixed seat is fixedly arranged above the feeding pipe, a second rotating shaft is rotationally arranged on the fixed seat, a driven wheel is fixedly arranged at the top of the second rotating shaft, and after the first rotating shaft rotates, a driving wheel drives the driven wheel to rotate through a chain, so that the second rotating shaft can drive a scraping rod to rotate in the feeding pipe; the material scraping rod can provide a material scraping effect on materials on the inner wall of the feeding pipe, the materials are prevented from being attached to the inner wall of the feeding pipe, the heating pipe can generate heat through the controller, and the materials are not prone to being blocked in the feeding pipe.

The utility model discloses a T-shaped plug-in suction cup storage assembly. The T-shaped plug-in suction cup storage assembly comprises a storage rack and a suction cup device. The suction cup device comprises a deformable suction cup piece, a shell and a control piece. The control piece drives the sucker piece to float and deform so as to adsorb or release the bearing surface; an inserting part is arranged on the back side of the connecting part; the inserting part comprises a bottom wall and a first inserting wall so as to form a first inserting groove; a vertical third insertion wall is arranged in the first insertion groove; the storage rack is provided with a back plate and a second insertion wall which are parallel to each other to form a second insertion groove with a closed top end; a third inserting groove is formed in the second inserting wall; the second inserting wall is inserted into the first inserting groove from top to bottom, the bottom end of the second inserting wall abuts against the bottom wall, the first inserting wall is inserted into the second inserting groove from bottom to top, and the third inserting wall is inserted into the third inserting groove from top to bottom, so that a T-shaped plug-in type connecting structure is formed between the storage rack and the suction cup device. A storage structure is arranged on the back plate; the utility model has the advantages of no need of tool installation, convenient installation and disassembly, and high structural strength.

The utility model discloses an ostomy bag pouring device which effectively solves the problem that an ostomy bag is inconvenient to pour. Comprising a rectangular box in the left-right direction, an opening of the rectangular box faces rightwards, the left end of the rectangular box is detachably connected with a flushing box, the upper end of the flushing box is connected with a flushing pipe, sliding grooves in the left-right direction are formed in the front side wall and the rear side wall of the rectangular box correspondingly, and sliding plates are slidably connected into the sliding grooves; the front side wall and the rear side wall of the rectangular box are each provided with two vertically-symmetrical guide grooves, the guide grooves are in an inverted L shape and located between the two sliding grooves, rectangular blocks are slidably connected into the guide grooves, and inserting columns inserted into the kidney-shaped grooves in the corresponding sides of the rectangular blocks are fixed to the opposite ends of the rectangular blocks on the front side and the rear side correspondingly. Sliding rods in the left-right direction are fixed to the sides, away from the kidney-shaped grooves, of the rectangular blocks correspondingly, and blocking rods are arranged on the upper side and the lower side of an opening of the rectangular box correspondingly; the device is simple in structure, convenient to operate, novel in conception and high in practicability.

The invention discloses an ultrasonic welding device for sanitary towel edge pressing, and belongs to the field of welding knurling, the ultrasonic welding device comprises a pressing platform, a knurling mechanism is arranged on the pressing platform, a driving mechanism is arranged between the knurling mechanism and the pressing platform, the knurling mechanism comprises a mounting bracket rotationally arranged on the pressing platform, and a circular ring rotating shaft is rotationally arranged on the mounting bracket; a circular ring rotating shaft is arranged on the pressing platform, a circular pulling plate is arranged on the circular ring rotating shaft in a sliding mode, a plug pin is fixedly arranged on the circular pulling plate, an embossing welding roller is detachably installed in the circular ring rotating shaft, the embossing welding roller is fixedly connected with the circular ring rotating shaft through the plug pin, and the embossing welding roller can rotate relative to the installation support; according to the embossing welding roller device, the three sets of embossing welding rollers are arranged to meet different embossing requirements, the overall structure of the device is coherent, the functions are matched with one another, finally, the embossing welding rollers are easily disassembled, and time is saved.

This utility model relates to the field of transfer equipment technology, specifically disclosing a two-stage telescopic mechanism. The mechanism includes a fixed frame, a first lifting frame, a second lifting frame, and two drive units. The fixed frame includes two first male connectors. The first lifting frame includes a first frame plate, one surface of which is fixed with two first female connectors that slide in cooperation with the first male connectors, and the other surface of which is fixed with two second male connectors. The second lifting frame includes a second frame plate, one surface of which is fixed with two second female connectors that slide in cooperation with the second male connectors, and its bottom has a through-hole, with the two second female connectors located on opposite sides of the through-hole. One drive unit is fixed to the fixed frame and located between the two first male connectors, and the other drive unit is fixed to the first lifting frame and at least partially passes through the through-hole. This mechanism simplifies the specific structure, reduces the space occupied, and achieves precise transfer of products to be processed.

The utility model discloses a projection display device, and the device comprises a light source module which is used for emitting a light beam; the reflection adjusting module is used for adjusting the propagation direction of the light beams emitted by the light source module so as to control different areas on the light modulation module to be irradiated by the light beams at different moments; the light modulation module is used for modulating the light beams and outputting image light obtained through modulation; the control module is used for acquiring target display light intensity of the target area from the light modulation module and controlling the illumination light intensity of the light beam emitted by the light source module to be matched with the target display light intensity when the target area on the light modulation module is irradiated, and the target display light intensity is the maximum display light intensity in the display light intensity corresponding to the pixel unit of the target area. Thus, the reflection adjustment module is arranged, so that the light beam emitted by the light source module can only illuminate a partial area on the light modulation module each time, the power consumption of the device is reduced through partitioned illumination of the light modulation module, and the size of the projection display device is reduced through multiplexing of the projection lens.

This invention relates to a carrier, which includes a support frame and a first wheel assembly and a second wheel assembly respectively disposed at the bottom of the support frame. The support frame includes a surrounding frame, a support frame disposed below the surrounding frame, and a support assembly connected between the surrounding frame and the support frame. The support assembly is foldable in the vertical direction. During the vertical folding process of the surrounding frame and the support frame, the first wheel frame of the first wheel assembly and the second wheel frame of the second wheel assembly can rotate towards each other and retract relative to the support frame, so that the first wheel body and the second wheel body move closer to each other in the front-back direction. This reduces the number of operation steps, decreases the overall size of the folded carrier, and also makes the structure of the folded carrier flatter.

The utility model discloses a compact line industrial and mining lamp relates to lighting device field, including the lamp shell of strip shape, the edge of both ends of lamp shell width direction is equipped with the flange extending to the direction away from the lamp shell, the back of lamp shell is equipped with a plurality of cooling fins, and the end of cooling fin length direction extends to the flange and is integrated with the flange, and the cooling fin of both ends of lamp shell length direction is equipped with the ceiling structure, and the front of lamp shell is equipped with the recessed groove body to the cooling fin side, and the lens and light source PCB are sequentially arranged in the direction of lamp shell front to back, the middle part of lens is fixedly connected with inductor, and the back of lamp shell is fixedly connected with the power box of being located cooling fin outside and being cylindrical, and the control structure is equipped in the power box, and the wall surface of both sides of power box and lamp shell is equipped with the wire -through part, and this line industrial and mining lamp structure is compact, and the volume is small, and the power box of cylindrical cooperation strip shape lamp shell design makes the appearance of lamp novel.

This invention discloses a three-stage displacement-related friction energy dissipation device and method, comprising a nested layer consisting of an integrally formed U-shaped outer layer and an I-shaped inner layer, with long friction blocks and U-shaped concave surfaces respectively on the U-shaped outer layer and the I-shaped inner layer; it also includes an intercalation layer with short friction blocks and arc-shaped protrusions corresponding to the long friction blocks and U-shaped concave surfaces. The two arms of the intercalation layer are inserted into the gap between the long friction blocks and U-shaped concave surfaces of the U-shaped outer layer and the I-shaped inner layer of the nested layer, and slide relative to the nested layer to achieve the first level of limiting; a second level of limiting is achieved by a screw sequentially penetrating the nested U-shaped outer layer, the intercalation layer, and the I-shaped inner layer. This invention achieves three-stage variable stiffness friction adaptive energy dissipation by providing constant friction force during the small displacement stage, exponentially increasing friction force during the medium displacement stage, and mechanically limiting and locking during the large displacement stage, which can better adapt to the differentiated requirements of structures for damping force and stiffness under earthquakes of different intensities.

The present invention provides a refrigerator, comprising: a door for opening and closing a storage compartment of the refrigerator, the door comprising a door lining, the door lining being arranged on the surface of the door facing the storage compartment; a bottle holder detachably connected to the door lining; a first bottle holder for loading articles, having a first working state and a second working state, the first bottle holder being configured to be stacked on the bottle holder when in the first working state, and being separately arranged outside the refrigerator as a storage box when in the second working state. When a user needs to clean the door, the bottle holder can be removed and the door lining of the refrigerator can be wiped. Since the door lining structure of the refrigerator is flat and has fewer corners after the bottle holder is removed, it is more convenient and quick for the user to clean the door. And since the first bottle holder is stacked on the bottle holder, the first bottle holders for refrigerators of different types can be interchangeable, thereby enhancing the adaptability of the first bottle holder.

This application relates to the field of artificial intelligence technology, and in particular to a knowledge graph question answering method, system, and storage medium based on structural induction and differentiable connectivity constraints. It decomposes natural language questions to obtain seed entities, employs personalized random walks around these seed entities to obtain their structural importance distribution, and integrates this distribution with semantic similarity as a retrieval criterion to filter candidate entity subgraphs. A gated graph neural network with geometric features such as hop count and node degree is introduced into the candidate subgraphs for structural inductive reasoning. Furthermore, differentiable connectivity constraints are constructed to softly model entity rewards and edge costs, ensuring the compact connectivity of the reasoning subgraph. End-to-end optimization is performed by combining question answering main loss, ranking loss, and connectivity regularization, thereby achieving accurate reasoning and prediction of answer entities in the knowledge graph.

The present invention discloses a children's bed, wherein the bed frame comprises an upper frame and a bottom support frame, wherein the bottom support frame comprises a front support frame and a rear support frame, wherein the upper portion of the front support frame is rotatably connected to a first sliding member, wherein the upper portion of the rear support frame is rotatably connected to a second sliding member, wherein the first sliding member and the second sliding member can each be relatively slidably arranged on the upper frame along a front-back direction, wherein the bed frame further comprises a front support frame and a rear support frame, wherein the front support frame is rotatably connected between the upper frame and the front support frame, and wherein the rear support frame is rotatably connected between the upper frame and the rear support frame. By adjusting the positions of the first sliding member and the second sliding member on the upper frame, the upper frame can be raised or lowered, thereby enabling the upper bed frame to have different use heights. The children's bed has a simple structure, and the structure after folding is very flat and compact, which brings convenience to the user's daily carrying and storage.

The invention discloses a fully-closed rotational molding machine and method for high polymer material forming processing, and relates to the technical field of rotational molding machines. The fully-closed rotational molding machine comprises a transmission mechanism, a rotating rod is arranged in the transmission mechanism, and a driving mechanism is arranged at one end of the rotating rod; the upper end and the lower end of the driving mechanism are each provided with a heat gathering mechanism used for focusing heat energy, a mold shell is arranged in each heat gathering mechanism, and the outer surface of each heat gathering mechanism is provided with a pressurizing mechanism which extends into the corresponding mold shell and increases the internal air pressure of the corresponding mold shell. High-pressure gas discharged by the pressurizing mechanism can effectively reduce bubbles in a plastic solution, the density and the surface quality of a product are improved, reduction of the bubbles means that the structure of the product is more uniform, potential defects are reduced, the plastic solution can be uniformly extruded to the inner wall of a mold shell through the high-pressure gas, and the product quality is improved. Especially for some corners and parts with complex shapes, the product is ensured to be clear in shape and free of defects.

The utility model relates to a lighting device. The lighting device comprises a charging device and a plurality of lighting devices, the charging device comprises a shell, a solar input module and an output module, a charging cavity is formed in the shell, and a rechargeable battery pack is arranged in the charging cavity; the solar energy input module is arranged on the surface of the shell, is electrically connected with the rechargeable battery pack and is used for storing energy for the rechargeable battery pack; the output module is installed on the side wall of the shell, electrically connected with the rechargeable battery pack and used for outputting electric energy outwards. The lighting device is provided with a lighting battery pack, and the lighting battery pack is detachably and electrically connected with the charging device through the output module and used for storing energy for the lighting battery pack. After being charged, the lighting device can be separated from the charging device and work independently of the whole charging device, and a user can use the lighting device in a split or combined mode with various use scenes according to different requirements. The lighting device is compact in overall structure, convenient to store and carry, capable of meeting various using situations of a user and flexible to use.

The underneath type double-guide-rail door machine comprises a door machine upper sill, a lift car and a door machine installation support, a door machine is assembled on the door machine installation support, the door machine upper sill is installed at the bottom of the lift car, the door machine installation support is connected with a C-shaped groove of the lift car, and the other side of the door machine installation support is connected with a reserved kidney-shaped hole of the door machine upper sill. A welded threaded hole is reserved in the door machine, a guide rail a and a guide rail b are assembled on the side wall of the door machine, a supporting mechanism is assembled on the side walls of the guide rail a and the guide rail b, a door sliding plate is assembled at the front end of the door machine, an upper door roller is assembled at the upper end of the door sliding plate, a lower door roller is assembled at the lower end of the door sliding plate, and the door sliding plate is installed on the door guide rail through an upper and lower door roller 1. Side rollers are mounted at the bottom of the door sliding plate; according to the underneath type double-guide-rail portal crane, the installation limitation of the portal crane is reduced, the special adjustable installation support is arranged at the bottom, and the assembling convenience of the portal crane is greatly improved.

The present invention discloses a children's dining chair, comprising a dining chair frame with an unfolded state and a folded state, and a locking mechanism for locking the dining chair frame in the unfolded state, the dining chair frame comprising a bottom bracket assembly and a foldable seat pocket assembly arranged on the bottom bracket assembly, the bottom bracket assembly at least comprising a front bracket and a rear bracket, the seat pocket assembly at least having side rods extending in an up-and-down direction, the side rods being connected to the front bracket in a relatively sliding manner along a length extension direction of the front bracket, and the upper part of the rear bracket being rotatably connected to the side rods, when the dining chair frame is in the folded state, the seat pocket assembly is folded and retracted with the front bracket as the side rods slide relative to the front bracket, the rear bracket flips over and retracts relatively with the side rods and the front bracket, the structure is very compact and flat, and the volume is also very small, which brings great convenience to the user's daily carrying and storage.