79results about How to "Play a foolproof role" patented technology

A wireless inventory verification system based on database synchronization relates to a wireless inventory verification device. The wireless inventory verification system comprises a main database of a supermarket inventory management system, a data synchronism server of an inventory system, and inventory systems. The supermarket inventory management system is connected with the data synchronism server of the inventory system, and the data synchronism server of the inventory system is connected with a plurality of inventory systems. The supermarket inventory verification is easily achieved without network, and the inventory data is easily uploaded under the unobstructed wireless network to replace the conventional paper and pen copying and manual entering, thereby the efficiency is increased greatly and the inventory accuracy is improved.

The invention relates to an anti-cracking structure for preventing board edge cracking, which is characterized in that the anti-cracking structure includes a circuit board, a fixed table and hot-meltblocks; the circuit board consists of core boards and a PP sheet clamped between the core boards, each core board consists of a board body and a copper foil layer, the PP sheet is used for bonding thecore boards, and locating holes are arranged in the edge of the circuit board; a number of locating pins corresponding to the locating holes are vertically arranged on the upper surface of the fixedtable, and the locating pins are inserted into the locating holes; and the hot-melt blocks are arranged at the edges of the core boards and are used for pre-fixing the core boards, and a number of anti-cracking holes are arranged in the edges of the hot-melt blocks. The phenomenon of circuit board cracking during processing can be avoided, and the production yield can be improved.

A touch screen package box comprises accommodating grooves for accommodating touch screens. Pits are formed in the middles of the bottoms of the accommodating grooves to enable reinforcing rib structures to be formed around the pits. Abutting bosses are arranged on the peripheries of the bottoms of the accommodating grooves, and protrude out of the bottoms of the accommodating grooves to enable the touch screens to be accommodated in the accommodating grooves and to enable gaps to be formed between the touch screens and the bottoms of accommodating grooves. The abutting bosses for supporting the touch screens are arranged at the bottoms of the accommodating grooves of the touch screen package box to avoid large-area contact between the touch screens and the bottoms of the accommodating grooves, so that possibility of friction is reduced; the abutting bosses are arranged on the peripheries of the bottoms of the accommodating grooves to enable window areas of the touch screens to be spaced, so that the window areas of the touch screens are prevented against friction and damages. The invention further provides a production method of the touch screen package box.

The invention provides a multi-layer circuit board and a fabrication method of the same. The multi-layer circuit board comprises at least two optical alignment marks and at least two melting heating regions, wherein the at least two optical alignment marks are arranged on core boards by etching and are used for aligning at least two core boards, and the at least two melting heating regions are arranged on board edges of the core boards and are used for melting after the alignment of the at least two core boards is completed. By the technical scheme, the punching and repeated alignment processis reduced, abnormal alignment caused by an abnormal factor such as alignment hole deformation is prevented, the alignment accuracy is improved, and the production efficiency and the production quality of the circuit board are improved.

The invention relates to an AGV charging pile butt joint device. The device comprises a body and a mobile equipment fixing piece used in cooperation with the body. The body comprises a fixing pedestaland a female needle. The female needle is installed on the fixing pedestal, and the female needle can move in a front-back direction, an up-down direction and/or a left-right direction relative to the fixing pedestal. The mobile equipment fixing piece comprises a male needle which can be correspondingly inserted and connected with the female needle, and the male needle is fixedly connected with amobile device to be charged. The female needle can move or rotate in a front-back dimension, an up-down dimension and/or a left-right dimension, adaptability is higher, and the female needle can makebetter contact with the male needle to complete a charging process.

The invention discloses a locating and shaping device and relates to the technical field of product shaping equipment. The locating and shaping device comprises an attraction locating device and a shaping device. The attraction locating device comprises an attraction locating assembly capable of longitudinally moving. The attraction locating assembly comprises multiple clamping blocks capable of transversely moving. The clamping blocks can provide transverse clamping force for products. The shaping device comprises an upper shaping device body and a lower shaping device body, wherein the upper shaping device body and the lower shaping device are oppositely arranged on the upper side and the lower side of an installation base plate correspondingly. The portion, corresponding to the shaping device, of the installation base plate is provided with a vertically-through hole. The upper shaping device body and the lower shaping device body each comprise a shaping plate capable of moving up and down. Each shaping plate is provided with shaping grooves adaptable to the structure of components to be shaped. The locating and shaping device can achieve accurate locating of the product, the shaped product components are good in consistency, the shaping efficiency is high, the yield of the products can be improved, automatic product is facilitated, and the production cost of an enterprise is reduced.

The invention provides a circuit control board system of an electric welding machine. The circuit control board system comprises a control board and a master board, and the control board and the master board are connected through a flat cable; the master board comprises a switch power supply circuit, an input voltage judging circuit, a voltage doubling rectifying filter circuit, a rectifying filter circuit, an inverter circuit, a transformer, a full-wave rectifying circuit, a current feedback circuit and a voltage feedback circuit. The invention further provides the electric welding machine. The electric welding machine and the circuit control board system thereof have the advantages that the electric welding machine is simple and clear in structure; production process is simplified, production hours are shortened, and production cost is reduced; connection relation is simple, and some key connection leads are replaced by copper foils, so that a fool-proof function can be achieved, and the probability of production errors is reduced; interferences by clustering of traditional connection leads are reduced by the simple connection relation; functional modules are individually laid out, so that test and maintenance are facilitated; the whole system of the electric welding machine is modularized, so that operations such as improving and upgrading of the electric welding machine are facilitated.

The invention is suitable for the design field of printed circuit board (PCB) boards and provides a short connection method and a PCB pad package for different networks. PCB pad packages of two pins are in short connection. The short connection method achieves the conduction of two different networks based on the principle design of the PCB boards, reduces design risks caused by manually covering copper foils in design of the PCB boards, achieves conduction from the principle design to have the fool-proof function, and simultaneously prevents part material cost and part paster cost from increasing due to series connection of zero ohmic resistors or magnetic beads in a traditional method.

A PCB and IGBT module crimping structure and crimping method are disclosed, includes sequentially arranging water-cooled plate, IGBT module and PCB board from bottom to top, positioning water-cooled plate, IGBT module and PCB board by positioning pin, fixing water-cooled plate and IGBT module by screw, crimping PCB board and IGBT module by crimping tool and crimping pin and fixing with screw. Theinvention provides a PCB board and an IGBT module crimping structure and a crimping method, overcomes the defects of the prior art, and realizes high-quality and high-yield production of PCB and IGBTmodule assembly.

The invention belongs to the technical field of lithium ion batteries and particularly relates to a control system for controlling the placement time of a battery cell, comprising a scanning device, adisplay device, a storage module and a processing module; the scanning device is configured to scan and acquire data of placement time of the battery cell; the display device is configured to displaythe data of the placement time of the battery cell; the storage module is configured to store the data of the placement time of the battery cell; the processing module is configured to process the data of the placement time of the battery cell; the scanning device, the display device, and the storage module are all connected with the processing module. Compared with the prior art, by arranging acontrol system in the invention, the data of the placement time of the battery cell can be accurately recorded, instead of manually recording the data of the placement time of the battery cell, thereby improving the production efficiency of the battery cell as well as avoiding the occurrence of a manual recording error, the battery cell with placement timeout is prevented from entering the next process, which plays a preventing role and improves the safety performance of the battery cell.

The invention discloses a deep groove ball bearing with a split type retainer. The deep groove ball bearing comprises an outer ring, an inner ring, a steel ball, an upper frame body, a bearing frame and a lower frame body, the bearing frame is provided with pocket grooves, a connecting table is arranged on the bearing frame, first inserting grooves and second inserting grooves are formed in the two side walls of the connecting table, connecting grooves are formed in the bottom face of the pocket grooves, and an oil storage cavity is formed in the upper frame body. Positioning flanges are formed in an opening of the oil storage cavity, the positioning flanges are matched with the connecting grooves in an inserting mode, arc-shaped grooves are formed in the positions, corresponding to the pocket grooves, of the lower frame body, connecting bases are formed on the lower frame body, first inserting blocks and second inserting blocks are arranged on the connecting bases, the first inserting blocks are matched with the first inserting grooves in an inserting mode, and the second inserting blocks are matched with the second inserting grooves in an inserting mode. Positioning blocks are arranged at the ends of the first inserting blocks and the second inserting blocks, positioning holes used for being connected with the positioning blocks in an inserted mode are formed in the upper frame body. The overall structure is convenient to install and higher in stability, and the using effect and the production and machining efficiency of the overall structure are improved.

The invention discloses an intelligent walking stick for rehabilitation exercise, which comprises a stick body and a head body connected with the stick body, wherein a control panel is arranged on the head body, a controller electrically connected with the control panel is arranged in the head body, one end of the stick body,which is far away from the head body, is provided with a pressure sensor used for transmitting signals to the controller, a holding rod is arranged above the head body, the holding rod is provided with a plurality of supporting rods in a downward extending manner, and the top end of the head body is provided with a sliding groove matched with the supporting rods; and a supporting column is further arranged at the end, away from the holding rod, of the supporting rod, a fool-proof groove matched with the supporting column is formed in the bottom end of the sliding groove, a supporting spring is wound around the supporting column, one end of the supporting spring makes contact with the end of the supporting rod, and the other end of the supporting spring makes contact with the bottom end of the sliding groove. According to the scheme, through the arrangement of the controller, the control panel and the pressure sensor, the pressure borne by the walking stick is detected, the stress borne by the walking stick is sensed in real time, and rehabilitation training of a patient is facilitated.

The invention discloses a socket connector of a double-row needle structure, comprising a base rubber core, a floating rubber core arranged in the base rubber core and an elastic socket terminal arranged between the base rubber core and the floating robber core; a base rubber core opening with length and width both greater than those of the floating rubber core is formed in the middle of the baserubber core; the floating rubber core is arranged in the base rubber core opening by the elastic socket terminal. The invention further discloses a socket connector protecting structure of a double-row needle structure. The socket connector has strong practicability, is more labor-saving and smooth in plugging, firmer in butt joint and more steady in contact, and can improve the transmission stability; the floating rubber core has a three-dimensional movement amount of plus or minus 0.5mm in the base rubber core; and therefore, the socket connector is applicable to use in an environment with high vibrating requirement and the practicability of the socket connector is improved.

The invention provides a fixing device, a fool prevention fixing structure and an air conditioner, and relates to the technical field of air conditioners. The fixing device comprises a drain pipe fixing structure and an upper base, wherein the drain pipe fixing structure is fixedly connected with the upper base. The fixing device fixes an non-reset drain pipe through the drain pipe fixing structure to solve the problem that a drain pipe after disassembly cannot be fixed.

The invention provides a foam sprinkling can for a high-pressure cleaning machine. By adoption of the foam sprinkling can for the high-pressure cleaning machine, the technical problems that an existing foam sprinkling can is not provided with a water inlet connector or a negative-pressure cavity structure, consequentially, whether or not high-pressure liquid can be sprayed out cannot be determined, the negative pressure and the foam concentration cannot be adjusted freely, the cleaning effect is poor, and cleaning is inconvenient are solved. The foam sprinkling can for the high-pressure cleaning machine comprises a liquid storage bottle used for containing a foam cleaning agent, a spray head used for spraying the foam cleaning agent and a spray head base. An opening is formed in the upperend of the liquid storage bottle. A soap liquid filter head is fixed to the bottom of the inner side of the liquid storage bottle. A suction pipe used for sucking the foam cleaning agent is arranged in the liquid storage bottle. The foam sprinkling can for the high-pressure cleaning machine has the advantage of good cleaning effect.

The invention discloses a brushless DC motor, which comprises a shell, a stator, a rotor, a control board and a conductive elastic sheet, wherein both the stator and the rotor are arranged in the shell; the control board and the stator are fixed; an anti-interference circuit is arranged on the control board; the conductive elastic sheet is arranged on the control board; and one end of the conductive elastic sheet is connected with the anti-interference circuit, and the other end of the conductive elastic sheet abuts against the inner wall of the shell. According to the brushless DC motor of the invention, harmonic waves of the brushless DC motor are conducted and eliminated by adopting the conductive elastic sheet, a fool-proof role can be effectively played, the mounting and operation step is simplified, the possibility that wires are wrongly connected due to too many wires can be reduced, the production cost is reduced, and the standardization degree of the brushless DC motor is improved.

The invention provides an electric energy metering joint wiring terminal strip, which comprises a plurality of current wiring areas and a voltage wiring area, wherein the current wiring area comprisesthree current connecting sheets, a plurality of current input terminals and a current output terminal; the current wiring area is provided with three first through cavities; the current connecting sheets are arranged in the first cavity and are mutually insulated; one end, close to a phase line, of the current connecting sheet is provided with the current input terminal; one end, close to an analog input merging unit, of the current connecting sheet is provided with the current output terminal; the current input terminal and the current output terminal are electrically connected with the corresponding current connecting sheet; the current wiring area is also provided with a jumping wire device; the jumping wire device is electrically connected with the two current connecting sheets respectively; and the jumping wire device can selectively electrically connect or disconnect the two current connecting sheets. Through the jumping wire device and a polygon jack, wiring of a merging unit field tester is convenient and reliable.

The invention discloses a tunnel arch foot connecting plate positioning tool and a steel arch construction method. The tunnel arch foot connecting plate positioning tool comprises two or more box bodies, each box body comprises a positioning plate and a cover body, a cavity for containing a connecting plate is formed in the positioning plate, limiting holes corresponding to connecting holes in the connecting plate are formed in the bottom of the positioning plate, a fracture groove is formed in the middle of the cover body, the cover body covers the positioning plates and shields the connecting holes in the connecting plates, and a limiting piece is connected between every two adjacent positioning plates. When the tool is used for construction, firstly, the positioning plates are fixedly installed at the preassembling positions, corresponding to the steel arches, on the two sides, then the connecting plates are fixedly installed on the positioning plates, the limiting pieces are installed between every two adjacent positioning plates and adjusted, the steel arches at the positions, corresponding to arch feet, on the two sides are spliced through the steel arches of the preset size, after the steel arch is fixed, the cover body is installed on the positioning plate, concrete is sprayed, and after the concrete is solidified, the cover body, the positioning plate and the limiting piece are removed. According to the tunnel arch foot connecting plate positioning tool, the connecting hole can be effectively prevented from being blocked.

The invention discloses a detection device for piston through holes. The detection device comprises a base plate and a central positioning column, laser emitters and receivers which are arranged on the base plate, wherein through holes, through which the laser can pass, are formed on the central positioning column; the laser emitters are mounted on an axis on one side of the through holes of the central positioning column; the receivers are mounted on the axis on the other side of the through holes of the central positioning column; a flash alarm is arranged on the receiver; the laser emitters, the receivers and the flash alarm are electrically connected with a controller; the quantity of the laser emitters and the receivers is respectively four; one laser emitter is corresponding to one receiver; the laser emitters and the receivers are respectively corresponding mounted on the axes on the two sides of the two through holes. The detection device for piston through holes has the beneficial effects of advantages of simple structure, high detection efficiency and excellent detection effect.