220results about How to "Simple and beautiful structure" patented technology

The invention provides a dual-polarized vibrator unit, an antenna and a multi-frequency antenna array. The dual-polarized vibrator unit includes a radiator and a balun support portion for feeding of the radiator. The radiator includes a dielectric substrate, two pairs of dipole antenna arms being disposed on an upper surface of the dielectric substrate and in orthogonal arrangement of plus or minus 45 degrees, and at least one coupling metal strap disposed on a lower surface of the dielectric substrate. Current induction is generated between the dipole antenna arms and the coupling metal strap so that a current path is formed on the coupling metal strap. The vibrator unit and the antenna thereof in the invention can achieve the ultra-broadband, high gain, high efficiency, high cross polarization ratio and high front-ratio, high isolation, low profile and low coupling and is simple and beautiful in structure, easy in engineering realization and suitable for mass production, the production cost is reduced, and the electrical performance index meets the base station antenna industry standard.

The invention relates to a modular administration appliance provided with a reusable base unit (100) comprising a drive device (140, 150) and a replaceable cartridge (200) that is detachably connectedto the base unit and comprises a product container (250). A rotary movement is transmitted between the base unit and the cartridge. To this end, the base unit comprises a driving element (160) whichcan be displaced in a rotary movement about a rotational axis by means of the drive device, and the cartridge comprises a rotatable transmission element (233) which is embodied in such a way that a rotation of the transmission element causes the ejection of the medicament to be administered. In a preferred form of embodiment, the transmission element at least partially surrounds the drive device.

The invention relates to an integrally-packaged power semiconductor device. A top source electrode of an inverted low-end MOSFET (Metal-Oxide-Semiconducotr Field Effect Transistor) chip is electrically connected to the top surface of a chip base; a bottom drain electrode of a high-end MOSFET chip or a top source electrode of the inverted high-end MOSFET is electrically connected with a bottom drain electrode of the low-end MOSFET chip through a first metal connecting plate; a second metal connecting plate is stacked on the high-end MOSFET chip; and the chip base is also provided with a control chip and is electrically connected with the electrodes of the high-end MOSFET chip and the low-end MOSFET chip. According to the invention, a plurality of chips are stereoscopically packaged so as to reduce the whole size of the semiconductor device; in addition, the product performance of the semiconductor device is improved by largening the size of each chip in a packaging body which has the same size as that of the chip; and because the top source electrode of the low-end MOSFET chip and the top surface of the chip base are connected, the bottom surface of the packaged and exposed chip base is connected with a ground electrode, and the shape of the exposed bottom surface is simplified, and the area of the exposed bottom surface is maximized so as to facilitate heat dissipation.

The invention belongs to the technical field of 3D (three-dimensional) printers, and relates to a small desktop 3D printer which can reduce resonance. The 3D printer comprises a case, a machine frame, a printing unit, a drive device and a consumable mounting box, wherein the drive device comprises an X-axis drive motor, a Y-axis drive motor and a Z-axis drive motor; the drive device is fixed to the machine frame; the printing unit comprises a consumable extrusion device, a motor bracket, a printing platform and a platform bracket; the consumable extrusion device is fixedly mounted on the motor bracket; the printing platform is fixed to the platform bracket; the consumable mounting box is fixedly mounted on the case. The 3D printer has the beneficial effects that the overall structure is simple and attractive; consumables are convenient to replace; a phenomenon of wire blocking in a wire feed throat pipe is effectively avoided; the vibration generated when the 3D printer works is reduced; the printing quality of a product is improved; the internal space utilization rate of the 3D printer is improved; the printing range is large; the 3D printer is simple in structure and convenient to assemble.

The invention relates to a vacuum cup capable of cooling and heating instantly, which is convenient in use, wherein air-cooling and air-heating speed of drinking water in the cup can be regulated in a stepless manner. The vacuum cup capable of cooling and heating instantly comprises a cup body and a cup cover, the cup body comprises an inner layer, a shell and a gap layer, the gap layer is arranged outside the inner layer and inside the shell, a bottom hole is arranged at the bottom of the cup body and is communicated with the bottom of the gap layer, an upper hole is arranged at a high position of the shell and is communicated with a high position of the gap layer, a ventilating notch or an air vent is arranged on a skirt, which is lower than the bottom hole, of the shell, the shell is provided with a concave bottom, the bottom hole is arranged on the concave bottom of the shell and provided with a bottom hole cover or a bottom hole switch, and the upper hole is provided with an upper hole switch. The vacuum cup can realize air cooling and air heating for the drinking water in the cup, the air-cooling or air-heating speed of the drinking water in the cup can be regulated in the stepless manner, the drinking water in the cup can be in water cooling or water heating rapidly, a thirsty person can drink the drinking water at the proper temperature rapidly, and furthermore, the vacuum cup can brew good tea and heat milk, and is convenient in use.

The invention provides a refrigerator mechanical air door switch and a refrigerator. The refrigerator mechanical air door switch comprises an air door. An air flue is arranged on the air door. The refrigerator mechanical air door switch further comprises a first air outlet which is used for pumping air in the air flue into a storage chamber of the refrigerator, is arranged on the air door and penetrates through the air door, a first shifting rod which is used for controlling the air outlet amount of the first air outlet and is arranged on the back face of the air door, and a rotary knob which is used for rotating the first shifting rod and arranged on the front face of the air door, wherein the first shifting rod and the rotary knob are fixedly connected. The refrigerator mechanical air door switch is simple and attractive in structure, the cost can be reduced, mounting and dismounting are convenient, and icing is not prone to occurring to the refrigerator air door.

The invention discloses an automatic location device for hospital beds, which uses an intelligent control device, an impending mechanical arm and a Z shaft adjusting device and an X shaft adjusting device of the impending mechanical arm. The automatic location device can transfer a patient on a treating bed at the position far away from an accelerator. By means of the impending mechanical arm, a doctor cannot be affected no matter where the doctor stands, thereby being convenient. By locating the control device, the Z shaft adjusting device and the X shaft adjusting device can be controlled to send the patient to the curing position, and the patient can be adjusted according to actual requirements. The automatic location device is concise and attractive in the whole structure and improves work efficiency.

The invention provides a five-freedom-degree spraying robot. The five-freedom-degree spraying robot comprises a base, a lifting arm, a large arm, a small arm, a wrist part and an output shaft, wherein the lifting arm is capable of lifting up and down and horizontally moving relative to the base; a rotation axis of the large arm relative to the lifting arm, a rotation axis of the small arm relative to the large arm and a rotation axis of the wrist part relative to the small arm are same and are same and are parallel to an horizontal movement axis of the lifting arm relative to the base; a rotation axis of the output shaft relative to the wrist part and a rotation axis of the wrist part relative to the small arm are perpendicular to each other and are crossed with each other; a small arm motor, a wrist part motor and an output shaft motor are arranged at the front end of the large arm and are transmitted to the small arm, the wrist part and the output shaft via a one-stage or multi-stage synchronous belt; five motors are isolated in three sealed spaces; each sealed space adopts dynamic and static sealing strategy to ensure that electric gas is isolated with the outside flammable and explosive gases; high explosion resistance is achieved; mounting and driving manners of joint speed reducers are also optimized by the five-freedom-degree spraying robot; the five-freedom-degree spraying robot has the characteristics of simple structure, low cost, large operation space, high flexibility, high tail end positioning accuracy, convenience in wire layout, reliability in sealing and high explosion resistance.

The invention relates to a truss manipulator for loading and unloading. The truss manipulator for loading and unloading is composed of a support structure, a horizontal movement assembly, a vertical movement assembly, an automatic handgrip, and a transition connection plate between two shafts, wherein the horizontal movement assembly is fixedly installed at the top end of the support structure; the vertical movement assembly runs on the horizontal movement assembly; and the automatic handgrip is installed at the bottom end of the vertical movement assembly. According to the invention, a single-vertical-column supporting main body structure is adopted, and reinforcing ribs are designed and used for improving the strength and the rigidity of the truss main body structure; and transmission in a horizontal movement is realized in a manner of matching a V-shaped slide rail with independent gear and rack, each of the gear and the rack is provided with modulo-two oblique teeth with an accuracy class of 6, the transmission manner can greatly meet requirements on a high speed, and the transmission accuracy can be controlled to be less than 0.1mm.

The invention belongs to the technical field of 3D printing and particularly relates to a high-temperature 3D printing machine based on polar coordinate motion. The high-temperature 3D printing machine comprises an inner cavity and an outer shell arranged on the outer portion of the inner cavity in a sleeving mode. The inner cavity is located in the middle of the outer shell and comprises a metal supporting outer shell body, an insulation layer and a multistage heating device which are used for achieving step temperature rising and maintaining. A nozzle moving motor and a support are arranged between the top of the inner cavity and the top of the outer shell. A hole is formed in the top of the inner cavity. The linear motion nozzle is connected with the nozzle motor through the support and extends into the inner cavity through the hole. The nozzle moving motor drives the linear motion nozzle to do linear motion. A rotary composite molding platform is arranged in the inner cavity. Materials sprayed out by the nozzle are molded on the rotary composite molding platform. Through the printing machine, the temperature of a molding space can be kept constant, the printing motion path of the printing machine is improved, and the molding problems of molding buckling, layering and the like of high-temperature printing of existing FDM printing machines can be effectively solved.

The invention provides a capacitance compensation switch. A silicon controlled module is installed on a heat dissipation base and is arranged in a casing; the control circuit on a control circuit board is provided with a signal input end and a signal output end; the signal input end of the silicon controlled module is electrically connected with the signal output end of the control circuit; the heat dissipation base is provided with a heat dissipation base plate and two side plates and heat dissipation fins; the heat dissipation fins and the two side plates are arranged in parallel; the two ends of the heat dissipation base plate is provided with a protrusion part which is provided with an installation through hole; the side plate of the heat dissipation base plate is provided with an installation groove which is provided with installation screw holes; the lower part of the side plate of the casing is inserted into the installation groove and is fixedly connected onto the side plate through screws and installation screw holes; two connecting terminal rows are installed on the heat dissipation base plates; the silicon controlled module is arranged between the two connecting terminal rows; the controlled silicon module and the connecting terminal rows are electrically connected through an electric conductor; and the control circuit board is installed on the inner wall of the top plate of the casing. The invention has simple and stable structure, convenient installation, easy maintenance, little electromagnetic interference and high reliability.

The invention discloses a low-power consumption and high integration main board with a plurality of expansion interfaces. The low-power consumption and high integration main board with the plurality of expansion interfaces comprises a main board of a printed circuit, a central process unit (CPU) and a South Bridge chip, wherein the CPU and the South Bridge chip are integrated on the main board. A UNI-peripheral component interface express (PCIE) expansion interface, a high-definition multimedia interface (HDMI) / digital video interactive (DVI) / data processing (DP) control module, a PCIE control module, a hard disk control module, a universal serial bus (USB) control module, a recommend standard (RS) 232 / 422 / 485 control module, a voice frequency control module, a control signal module and a line print terminal (LPT) parallel interface control module are arranged on the main board. Pins are arranged in the UNI-PCIE expansion interface, wherein the pins correspond to the above-mentioned control modules. The pins are respectively connected with the above-mentioned modules through drive circuits. Compared with the prior art, the low-power consumption and high integration main board with the plurality of expansion interfaces achieves the unification of a plurality of external interfaces through the UNI-PCIE expansion interface, so that the structure of the main board becomes simple and attractive and manufacturing cost and energy consumption of the main board are reduced.

The invention discloses an open type super-long-span cable dome structure. The structure is composed of an internal truss ring, an external pressure ring beam and a cable-strut system; the cable-strutsystem comprises a ring cable, supporting rods, an inner ring cable system and an outer ring cable system; the internal truss ring, the ring cable and the external pressure ring beam are coaxially arranged from inside to outside; the supporting rods are uniformly arranged in the circumferential direction and supported on the ring cable, and the supporting rods and the ring cable are crossed at the lower joints of the supporting rods. The inner ring cable system comprises inner ridge cables and inner stay cables, wherein the two ends of each inner ridge cable are connected with the internal truss ring and the corresponding supporting rod respectively, and the two ends of each inner stay cable are connected with the internal truss ring and the corresponding supporting rod respectively. Theouter ring cable system comprises outer ridge cables and outer stay cables, wherein the two ends of each outer ridge cable are connected with the corresponding supporting rod and the external pressurering beam respectively, and the two ends of each outer stay cable are connected with the corresponding supporting rod and the external pressure ring beam respectively. By means of the open type super-long-span cable dome structure, the defect that a lattice shell structure and a cantilever truss structure have many rods is overcome, and meanwhile, the problems that a cable net structure is largein supporting stress and the like are avoided, so that the structure is uniform in rigidity, and the joint construction is relatively simple. Meanwhile, a closed type cable dome is changed into the open type cable dome so that the cable dome, namely the integral tension self-balanced structure system, can be applied in a building roof structure of a stadium.

The invention provides an electronic cigarette which comprises an oil storage atomization assembly and a power supply control assembly. The oil storage atomization assembly is in clamped connection with the power supply control assembly. The power supply control assembly is provided with an elastic probe, and the oil storage atomization assembly is provided with a connecting rod corresponding to the oil storage atomization assembly. After the oil storage atomization assembly is in clamped connection with the power supply control assembly, the elastic probe is subjected to pressure coming from the connecting rod, and the oil storage atomization assembly is electrically connected with the power supply control assembly. The electronic cigarette has the advantages of reliability in electrical connection and the like.

The invention discloses a low-noise boiler with air preheating. The low-noise boiler with air preheating comprises a boiler body, a combustor connected to one side of the boiler body and a chimney connected to the other side of the boiler body, wherein a mute cover is arranged outside the boiler body; an air preheating region is arranged on one side of the mute cover; a smoke exhaust hole is formed in the top part of the air preheating region; the chimney is communicated with the smoke exhaust hole and a boiler smoke outlet; an air inlet vertical to the chimney is formed in one side of the upper part of the air preheating region; a first air channel is arranged in the air preheating region; the first air channel corresponds to the position of the chimney. The low-noise boiler with air preheating is simple and beautiful in overall structure, can reduce noise of the whole boiler, improves temperature of new air and reduces energy source needed for combustion, energy consumption and combustion cost as the air preheating region is arranged at one side of the boiler body, and the new air before entering into the combustor is preheated through the air preheating region in advance, and is energy-saving and relatively environment-friendly as heat energy of waste smoke can be further recycled.

The invention relates to a two-door-leaf manual folding car door device for an elevator. The two-door-leaf manual folding car door device comprises a car door, wherein the car door is composed of a hanging wheel door and a rotating shaft door which are arranged side by side and hinged to each other; a door hanging rail is arranged at the upper end of a car entrance / exit; the upper end of the outer side of the rotating shaft door is rotationally connected with the door hanging rail through an upper door shaft; the lower end of the outer side of the rotating shaft door is rotationally connected with a sill sliding groove through a lower door shaft; a door hanging wheel is arranged at the upper end of the outer side of the hanging wheel door; a guiding shaft is fixed at the lower end of the outer side of the hanging wheel door; an electromagnetic lock and a door closing in-place verification switch are mounted at the bottom end of the front side surface of a door head beam; an electromagnetic lock suction plate is mounted on the front side surface of the upper end of the rotating shaft door; after the door is closed in place, the door closing in-place verification switch is switched on, the electromagnetic lock and the electromagnetic lock suction plate attract mutually, and safety loop of the elevator is switched on, so that the elevator can run, and high safety and reliability are realized. According to the two-door-leaf manual folding car door device, the hanging wheel door and the rotating shaft door are hinged through a hinge, so that the folding door is formed and mounted at the position of the car entrance / exit, therefore, shearing and squeezing risks during running of the elevator car are prevented.

The invention relates to the technical field of electrical equipment, in particular to a switch cabinet. The switch cabinet comprises cross beams, upright columns, a face plate 1, a face plate 2, an upper chamber, a lower chamber and a partition board, wherein the cross beams and the upright columns are fixedly connected, the upright columns and the face plate 1 are fixedly connected, and the face plate 1 and the face plate 2 are fixedly connected; the partition board is arranged between the upper chamber and the lower chamber; and the face plate 1 and the face plate 2 are multi-folded aluminum zinc coated plates and are fixedly connected through flat head square neck bolts. The switch cabinet has simple and beautiful structure, use convenience and strong practicability, the upright columns have high mechanical strength, and the product can bear high-strength impact and is sturdy and durable. The production cost is reduced, the service life of the switch cabinet is prolonged, and the switch cabinet is easy to apply and popularize.

The invention discloses an automatic clamping cup tray with sensing devices. The automatic clamping cup tray comprises a cup hole, the sensing devices, a plurality of moveable cup clamps, a cup tray frame, pressure sensing devices and a mounting buckle, wherein the cup hole is downward formed on an upper surface of the cup tray frame in a mirror image form; small holes are uniformly formed on the upper surface of the cup tray frame along the circumference of the cup hole; the sensing devices are arranged in the small holes; the sensing devices are arranged along upward vertical direction and are all arranged under the upper surface of the cup tray frame; the moveable cup clamps are uniformly arranged on the middle part of an inner wall of the cup hole along the circumference; the moveable cup clamps are arranged as triangular prisms and the longest edges of the moveable cup clamps are arranged on the inner wall of the cup hole; the pressure sensing devices are arranged at the contacts of the moveable cup clamps and a water cup; the moveable cup clamps can move along the radial direction of the cup hole; a control mechanism moving along the radial direction is connected with the sensing devices and the pressure sensing devices. The automatic clamping cup tray with sensing devices can automatically identify the intention of putting in and taking out the cup, so that the cup can be automatically clamped and released.

The invention discloses a cold-formed thin-walled type steel combined truss purline. The cold-formed thin-walled type steel combined truss purline comprises an upper chord and a lower chord. A web member is arranged between the upper chord and the lower chord and composed of a plurality of intermittent web member units. Each web member unit comprises a horizontal web member perpendicular to the chords and two inclined web members. The horizontal web members and the inclined web members are fixedly connected with the upper chord and the lower chord. One ends of every two inclined web members are tightly adjacent to each other to form a V shape so that the truss purline can be formed. Zinc plates are further arranged on the joints between the web members and the upper chord and between the web members and the lower chord. The left end and the right end of the upper chord and the left end and the right end of the lower chord are provided with I-shaped support bases respectively. Upper top plates of the I-shaped support bases are fixedly connected with the upper chord. Angle braces are arranged between the lower bottom plates of the I-shaped support bases and the lower chord. The I-shaped support bases and a steel structure main beam of a building are connected. A connection mode is novel. The structure is attractive and simple, and construction speed is high; arranged zinc blocks can enhance the anti-corrosion effect and can also be used for fastening bolts, and stability of the truss purline is higher.

The invention provides a circulating heat conduction type energy-saving and environment-friendly machine room. The circulating heat conduction type energy-saving and environment-friendly machine room comprises a heat-insulation wall board room body. Equipment and an air conditioner are arranged in the heat-insulation wall board room body. A heat exchange plate used for dividing the heat-insulation wall board room body into an upper space cabin and a lower space cabin is arranged on the upper portion of the heat-insulation wall board room body, and the upper space cabin and the lower space cabin are insulated from each other. Openable shutters are installed on the two opposite side faces of the upper space cabin of the heat-insulation wall board room body correspondingly, and the upper space cabin communicates with the outside atmosphere through the openable shutters. A fan is installed on the inner side or the outer side of one openable shutter, and the fan is in linkage with the openable shutter. The circulating heat conduction type energy-saving and environment-friendly machine room has a heat insulation function and a heat dissipation function, manual or automatic switching can be conducted according to actual requirements, power consumption for operation of the air conditioner in the machine room is reduced, and energy saving and emission reduction are achieved. In addition, the principle that cold air moves downwards and hot air moves upwards is adopted, and a heat exchange layer is arranged at the top of the machine room, so that no air suction and exhaust equipment needs to be arranged in the lower space cabin, the cost is reduced, and the machine room is more environmentally friendly.

The invention provides a foldable desk which comprises a desktop and two desk legs. Each desk leg comprises a first folding section, a second folding section and a third folding section, wherein the first folding section and the desktop are connected to the ends, close to a second side face, of a third side face and a fourth side face through a first rotary bolt, the first folding section and thesecond folding section are connected through a second rotary bolt, and the second folding section and the third folding section are connected through a third rotary bolt. The desk legs are fixed to bein L shapes or triangles by folding the first folding sections, the second folding sections, the third folding sections, the first rotary bolts, the second rotary bolts and the third rotary bolts. When the desk legs are fixed to be in L shapes, the side view of the desk is overall in a C shape, the third folding sections are located at the bottommost portion of the desk to achieve a supporting function, and when the desk legs are fixed to be triangular, the second folding sections are located at the bottommost portion of the desk to achieve the supporting function. Rollers are arranged on thethird folding sections.

The invention relates to a flat cloth bag gas tank pulse type deduster which comprises a supporting leg. The supporting leg is provided with an upper box body which is separated into a filter chamber and a gas purifying chamber separated by a tube. A transverse flat filter bag is arranged in the filter chamber and is provided with a bag cage support. An air inlet channel is arranged on the upper part of the box body. Air inlets are respectively arranged at both ends of the air inlet channel. A purified air outlet groove is arranged on the lower side part of the upper box body, and a pulse jet system is arranged on the upper part of the gas purifying chamber. The flat cloth bag gas tank pulse type deduster provided by the invention is small in occupied area, low in device height, convenient for indoor arrangement and high in dedusting efficiency.

The invention discloses a wired and wireless integrated fetal monitor. The wired and wireless integrated fetal monitor comprises a wireless monitoring probe, a monitoring host and a pluggable connector. The wireless monitoring probe is connected to the monitoring host through the pluggable connector, the pluggable connector is provided with first pogo pins, and the wireless monitoring probe is provided with connection contacts corresponding to the first pogo pins; and the monitoring host is provided with a plurality of magnetic connection seats, and the magnetic connection seats are provided with second pogo pins corresponding to the connection contacts. The wired and wireless integrated fetal monitor can be flexibly switched between wired and wireless connection states, and can better realize stable and long-term uninterrupted fetal monitoring work.

A folding type manual telescopic car door serves as a household lift car door. Guide devices are arranged at the upper side and the lower side of an inlet and outlet of a lift car, wherein strip-shaped aluminum alloy or stainless steel material sheets are made into leaves, a shutter folding door is formed by connecting the leaves through couplers, hollow-out safe glass is embedded into the shutter folding door, sliding wheels are at least arranged at the upper end and the lower end of the shutter folding door, the sliding wheels are matched with the upper guide device fixed to a door header and the lower guide device fixed to a bed table, the sliding wheels slide along the guide devices, one end of the shutter folding door is fixed to a side wall plate of the lift car through fixing bolts, the other side of the shutter folding door is provided with a handle favorable for closing the door and an electrical contact switch confirming that the door is closed in place, when the door is closed in place, a safety circuit of a lift is connected, and the lift can be operated. The folding type manual telescopic car door avoids the danger of shearing and extruding in operation of the lift car and is simple in structure, attractive in appearance, convenient to operate, safe, reliable, low in fault rate and capable of sufficiently saving space.

The invention relates to a composite automobile headlamp which comprises a light guide plate, a reflection cup, a first LED light source and a second LED light source; the light guide plate is arranged at the opening end of the reflection cup; the first LED light source is arranged on the side face of the light guide plate; and the second LED light source is arranged at the bottom of the reflection cup. Different from an existing automobile headlamp in which a daytime running light and a nighttime running light are arranged separately, the composite automobile headlamp uses the light guide plate of a daytime running light as a light-permeable protection cover of a nighttime running light to integrate the daytime running light and the nighttime running light, so that mounting space is effectively saved, the function of the daytime running light and the function of the nighttime running light are both achieved, the overall structure is concise and attractive, the light utilization ratio is high, and the anti-dazzle effect is good.

The invention relates to a precise polyvinyl chloride (PVC) high-calcium fill metering and feeding device of a conical twin-screw extruder. The device comprises a storage device, a feeding device and a stirring device, wherein the storage device consists of a feeding hopper and a hopper cover arranged at the upper part of the feeding hopper; the feeding device comprises a feeding barrel, a driving motor, a motor connecting plate, a motor connecting body, a feeding screw rod, a first bearing seat, a deep groove ball bearing, a bearing check ring, a felt ring and a bearing cover; the stirring device comprises a stirring body, a stirring shaft, a second bearing seat, a shaft sleeve, a sprocket chain and a sprocket cover. Compared with the prior art, the precise PVC high-calcium fill metering and feeding device has the advantages of easiness in blanking, accuracy in feeding, simple and attractive structure, high conveying capacity, no fluctuation, good self-cleaning performance, high metering precision, wide application scope, etc.

The invention is concerned with a kind of two-double table of table tennis, relating to base frame, table-board and desk feet. The table-board is made of left and right table-boards and the desk feet connect with table-board in moving. There is at least one hinge support bar between the said left and right table-boards and base frame, and there is two-double hinge pole between hinge support bar and base frame. This table is beauty and is light, easy for collapsing, open and moving with small bulk after collapsed to storage. It is fit for common family and company, especially for small place, and it is suit for the development of the sport of table tennis.