37results about How to "Simple limit structure" patented technology

The invention relates to the field of experimental equipment and in particular provides a test tube fixation frame. The test tube fixation frame comprises vertically arranged vertical plates, whereinfixed plates used for being inserted by test tubes to fix the test tubes and supporting plates used for supporting the bottom of the test tubes are sequentially arranged from top to bottom among the vertical plates, more than two slots are formed in the vertical plates at intervals along the vertical direction, each slot is provided with a slot wall used for supporting the supporting plates and / orfixed plates which are inserted into the slots and connected among the vertical plates, and the slots are extended and arranged along the horizontal direction; and limiting structures used for limiting displacement of the supporting plates and / or fixed plates along the slot arrangement direction are arranged at the two ends of each slot. The limiting structures can guarantee that the supporting plates and / or fixed plates cannot move in the slots in an experiment process, so that fixation is realized; meanwhile, spaces between the supporting plates and the fixed plates can be changed by virtueof the supporting plates and / or fixed plates inserted into different slots, so that the test tubes in different specifications are adapted, and applicability is relatively high.

The invention relates to the field of functional sofas, in particular to a functional sofa stretching device with good supporting performance, which comprises a base, a sitting part, a backrest part, a leg supporting part, a driving part, a linkage assembly and a supporting assembly, the linkage assembly is used for driving the leg supporting part to rotate relative to the sitting part along with the driving of the driving part so as to form a sitting posture, a TV posture and a lying posture; the supporting assembly is connected with the base and the linkage assembly, the supporting assembly is a connecting rod mechanism, a limiting plate is arranged on one connecting rod of the supporting assembly, and a limiting structure used for supporting the supporting assembly in the sitting posture, the TV posture and the lying posture is arranged between the limiting plate and the base. When the sofa stretching device is in any one of the sitting posture, the TV posture and the lying posture, the end, close to the leg supporting part, of the sitting part can be supported by the limiting structure after force transmission through the linkage assembly and the supporting assembly, and therefore the problems that the end, close to the leg supporting part, of the sitting part is insufficient in supporting force and prone to sinking are solved. The stability of the sofa stretching device is improved.

The invention relates to a ball valve. The bottom limiting ball valve comprises a valve body, an open valve ball cavity in the upper end of the valve body, a valve ball arranged on the valve ball cavity and a sealing ring for being in contact with the valve body and the valve ball to realize limiting and sealing. The valve ball and the sealing ring are arranged from the upper portion of the valveball cavity, and the center position of the valve ball is limited through a valve cover. A convex pin part is arranged at the bottom of the valve body, and the convex pin part is positioned at the non-axial position of the valve ball cavity. According to the bottom limiting ball valve, the novel inner limiting structure is provided for an upper-mounted ball valve, the structure is not limited by an outer structure of the valve body, the appearance design is more concise, and the bottom limiting ball valve is more suitable for open-mounted occasions, flexible in limiting and accurate in positioning and has the uniqueness and competitiveness of a market structure.

The invention belongs to the technical field of electronic teaching, and discloses an interconnected blackboard with a playback function and a system thereof. The interconnected blackboard comprises an installation outer shell, a touch screen and a movable adjustment device; the touch screen and the movable adjustment device are arranged at one side of the installation outer shell, the touch screen is embedded in the installation outer shell, and the touch screen comprises a display area and a writing and recording area; sliding grooves are formed in the positions, located on the two sides ofthe touch screen, of the outer wall of one side of the outer shell, the movable adjusting device comprises a movable push rod, and the two ends of the movable push rod are located in the two sliding grooves respectively and slide along the sliding grooves; the display area and the writing and recording area are located on the two sides of the push rod respectively, and when the push rod moves, thearea of the display area and the area of the writing and recording area change accordingly. In conclusion, the adjustable display area and the writing and recording area are arranged on the interconnected blackboard, so that playback use and writing use of the interconnected blackboard can be realized at the same time, and the size of the corresponding area can be adjusted according to actual userequirements.

The invention discloses a mechanical limiting exoskeleton robot joint. The joint comprises a driving mechanism, a speed reducing mechanism, an executing mechanism and a feedback mechanism, and the exoskeleton robot joint can be driven to rotate at one degree of freedom. The driving mechanism is composed of a motor base, a motor, a rotating shaft, a rear end cover, a bearing, a stator check ring and a rotor check ring. The speed reducing mechanism is composed of a speed reducer, an output flange and a front end cover. The executing mechanism is composed of an upper connecting plate and a lowerconnecting plate. The feedback mechanism is composed of an absolute value encoder and a relative value encoder. A fan-shaped groove with the angle ranging from -6 degrees to 120 degrees is formed in the middle of the front end cover, a boss is designed for the output flange, the boss of the output flange is located in the fan-shaped groove of the front end cover after assembly and can move along the fan-shaped groove, therefore the relative rotation relation between the upper connecting plate and the lower connecting plate is converted into relative rotation between the front end cover and theoutput flange, and mechanical limiting is achieved. Hard limiting of the joint rotation angle is achieved through a mechanical structure, and the working safety and reliability of a robot are improved.

The invention relates to a forklift door frame, and provides a forklift door frame and a forklift in order to solve the problems that an existing forklift door frame is high in roller cost and difficult to maintain. The forklift door frame comprises an inner side door frame body and an outer side door frame body, wherein the outer side door frame body comprises outer side stand columns; and the inner side door frame body comprises inner side stand columns. The forklift door frame is characterized by further comprising sliding blocks arranged between the adjacent outer side stand columns and inner side stand columns; the sliding blocks are fixed to the side face of one of the adjacent outer side stand column and inner side stand columns and provided with sliding friction working faces making contact with the side face of the other stand columns in an attached mode; a plurality of communicated grease storage grooves are formed in the sliding friction working faces of the sliding blocks;grease storage oil channels are formed in the sliding blocks; and lubricating grease filling ports communicated with the grease storage oil channels are formed in the tops of the sliding blocks. According to the forklift door frame and the forklift, rollers in a traditional door frame are replaced with the sliding block structures, the limiting structure of the inner side door frame body is simplified, the manufacturing cost is reduced, and meanwhile the maintenance convenience is improved.

The invention discloses a double-end-face containerized mechanical seal which comprises a shaft sleeve, a static ring seat and a sealing seat. The shaft sleeve is sleeved with a main seal body and anauxiliary seal body, and the two ends of the main seal body are assembled between one end of the shaft sleeve and the static ring seat in a sealed mode respectively. A sealing cavity is formed in theend, close to the main seal body, of the sealing seat. The auxiliary seal body is assembled in a sealing cavity. The main seal body comprises a main movable ring, a main static ring and a main staticring seat, wherein the tail end of the main movable ring is mounted in a first mounting groove, a second mounting groove is formed in the end, close to the main movable ring, of the static ring seat,and the tail end of the main static ring seat is mounted in the second mounting groove. A third mounting groove is formed in the other end of the main static ring seat, the end, away from the main movable ring, of the main static ring is slidably matched in the third mounting groove, and an elastic compensation assembly is arranged between the bottom of the third mounting groove and the tail end of the main static ring. The double-end-face containerized mechanical seal is convenient to install and maintain, stable in performance and wide in application range.

The invention provides a juicer with a reliable structure. The juicer comprises a machine base, a juice collection container connected to the machine base, an extrusion screw rod longitudinally disposed in the juice collection container, and an upper cover which covers an upper port of the juice collection container, wherein an opening and a feeding channel communicating with the opening are formed in the upper cover; a rotary feeding device is disposed on the upper end of the extrusion screw rod; the rotary feeding device and the extrusion screw rod form an integral manner; the extrusion screw rod drives the rotary feeding device to move; the rotary feeding device comprises a feeding hole and a discharge hole; the feeding hole and the opening are disposed correspondingly; a circumferential limiting structure is disposed on the upper cover; a positioning structure is disposed circumferentially on the rotary feeding device; and the circumferential limiting structure is coordinated withthe positioning structure to conduct circumferential limiting of the extrusion screw rod. Through coordination of the limiting structure and the positioning structure, assembly accuracy of the rotaryfeeding device, the extrusion screw rod and the juice collection container can be further increased; and reliability of transmission can be ensured.

The invention discloses an electromagnetic relay, which comprises a base, a magnetic circuit part, a contact part and a push clamp, an armature of the magnetic circuit part is arranged on the base in a swinging manner, the contact part comprises a movable spring part with a movable contact and a static spring part with a static contact, and the movable spring part and the static spring part are respectively arranged on the base; the electromagnetic relay further comprises an elastic piece, the armature is matched with the movable spring part through the elastic piece and the pushing card, when the armature moves in the attraction direction, the movable spring part is driven to act through the elastic piece and the push clamp, and in an overtravel stage of the armature, the elastic piece elastically deforms. According to the invention, the contact overtravel and the contact pressure can be realized under the assistance of the elastic deformation of the elastic piece, so that on the one hand, the static spring part can be made to be rigid and does not need to be made to be flexible for realizing the contact overtravel, and the anti-drop impact performance of the relay is improved; and on the other hand, the problem that the armature cannot be attracted in place after the current-carrying capacity of the product is improved is solved.

The invention discloses a moisturizer sliding switch structure of a simple structure. The moisturizer sliding switch structure comprises a moisturizer shell and a sliding cover, wherein a sliding hole is formed in the surface of the moisturizer shell; limiting holes are formed in both the upper end and the lower end of the sliding hole; a limiting column is arranged on the back surface of the sliding cover; gap holes which are distributed in the track direction of the sliding hole are formed in the left end and the right end of the sliding hole; a reset elastic strip is formed relative to the area between the gap holes and the sliding hole in the moisturizer shell; the limiting column is inserted into the sliding hole to enable the sliding cover to slide along the track of the sliding hole in a reciprocation manner; the aperture of the limiting column is greater than that of the sliding hole and is smaller than that of each limiting hole; sliding limit on the sliding cover is completed when the limiting column is moved to the limiting holes. The moisturizer sliding switch structure which is of the simple structure and is disclosed by the invention is simple in structure and low in cost.

The invention relates to a rotary output device and a switch cabinet operating mechanism using the same. The rotary output device comprises a power output shaft, a power input shaft which drives the power output shaft to rotate through driving a transmission mechanism, and a bidirectional locking mechanism which locks the rotation of forward and backward directions of the power output shaft when the power output shaft rotates to a position, and the bidirectional locking mechanism has a locking state and an unlocking state. The invention provides the rotary output device, the power output shaft is driven by the power input shaft through driving the transmission mechanism, and when the power output shaft rotates to the position, the power output shaft is locked by using the bidirectional locking mechanism, the rotation of the power output shaft in the forward and backward directions is avoided, and thus the defect of a single direction limit is avoided.

The invention provides an anti-displacement multidirectional-rotation rocking chair which comprises a chair seat (1) and is characterized in that the bottom of the chair seat (1) is provided with a rocking disc (2); the bottom of the rocking disc (2) is a spherical cambered surface (21); a foot can touch the support surface where the rocking disc (2) is located; the sphere radius R of the spherical cambered surface (21) is greater than the distance between a jointly-swing gravity center G (10) and the support surface where the rocking disc (2) is located; the bottom of the rocking disc (2) is provided with a horizontal brace cushion (9); a main raised head (91) is arranged on the horizontal brace cushion (9); and a main notch (28) matched with the main raised head (91) is arranged at the bottom of the rocking disc (2). The rocking chair provided by the invention overcomes the existed disadvantages in the prior art, is incapable of damaging the support surface when in use, capable of keeping the reciprocating swing at the original support position, easy to use in rooms which have limited space and smooth ground, simple in limiting structure, more convenient and comfortable for use and easy to popularize and apply.

The invention relates to a ball valve. The ball valve comprises a valve body, a valve ball and a sealing ring. The valve ball is enclosed through an opening in the upper part of the valve body. A valve rod is arranged on the valve ball. A valve ball chamber at the lower end of the opening is not a cylinder. Symmetrical planar parts are arranged inside the valve body and intersect with a circular-arc-shaped inner wall. The planar parts are in contact fit with a rotatable positioning piece. The positioning piece is fixed to the valve rod. The positioning piece is provided with a right angle part. The distance between the straight line border of the right angle part and the axis of the valve rod is a half the distance between the two planar parts. The invention belongs to top assembly type ball valves, and provides the novel ball valve structure with valve body inner limitation. The ball valve structure is not limited by an external structure of the valve body. Structural designs such asa handle can be simpler and more flexible, and the ball valve structure is applicable to showing installation places and is more attractive in appearance. The ball valve is simple in limiting structure, can bear higher torsion, is accurate in positioning, and has market uniqueness and competitive power.

The invention provides a self-corrective multidirectional-rotation rocking chair which comprises a chair seat (1) and is characterized in that the bottom of the chair seat (1) is provided with a rocking disc (2); the bottom of the rocking disc (2) is a spherical cambered surface (21); a foot can touch the support surface where the rocking disc (2) is located; the sphere radius R of the spherical cambered surface (21) is greater than the distance between a jointly-swing gravity center G (10) and the support surface where the rocking disc (2) is located; the bottom of the rocking disc (2) is provided with a horizontal brace cushion (9); a plurality of assistant raised heads (95) are arranged on the horizontal brace cushion (9); and assistant notches (29) matched with the assistant raised heads (95) are correspondingly arranged at the bottom side of the rocking disc (2). The rocking chair provided by the utility model has a function of multidirectional freedom reciprocating swing, is incapable of damaging the support surface when in use, capable of keeping the reciprocating swing at the original support position, easy to be used in rooms which are limited in space and smooth in ground, simple in limiting structure, more convenient for use and easy to popularize and apply.

The invention relates to an unmanned aerial vehicle and a working method thereof. The unmanned aerial vehicle comprises an aerial vehicle body, a plurality of supporting arms fixedly connected with the aerial vehicle body and propellers fixed to the upper ends of the outer sides of the supporting arms. A battery for driving the aircraft to operate and a controller for controlling the aircraft to operate are arranged in the aerial vehicle body; a folding undercarriage hinged to the supporting arm is arranged below the end of the outer side of the supporting arm, the undercarriage comprises a hollow main cylinder with one end provided with a hole and a telescopic rod slidably connected with the main cylinder, two electrodes are symmetrically arranged on the inner wall of the main cylinder in the radial direction and electrically connected with the controller, and the telescopic rod is made of a conductive metal material. When the telescopic rod contracts towards the interior of the main cylinder, the two electrodes are connected and conducted through the telescopic rod; the unmanned aerial vehicle controls the on / off of the electrode through the up / down movement of the telescopic rod during landing and landing, the controller controls the propeller to rotate or stop through the electric signal introduced by the electrode, the reaction is sensitive, the safety is high, and the continuous rotation of the propeller after the unmanned aerial vehicle lands is effectively avoided.

The invention discloses a driving structure based on an eccentric shaft. The driving structure comprises a base body with an inner cavity, a driven part movably assembled in the inner cavity and an eccentric shaft in linkage fit with the driven part, the eccentric shaft comprises a first rotating shaft part and a second rotating shaft part which are coaxially arranged, an eccentric shaft part which is arranged between the first rotating shaft part and the second rotating shaft part and eccentrically arranged is further included, the diameter of the first rotating shaft part is larger than thediameter of the second rotating shaft part, a first shaft hole penetrating through the interior and the exterior is formed in the side wall of one side of the inner cavity of the base body, a second shaft hole is formed in the position, opposite to the first shaft hole position, of the other side wall of the inner cavity, the diameter of the first shaft hole is larger than that of the second shafthole, the first rotating shaft part is rotatably matched with the first shaft hole, the second rotating shaft part is rotatably matched with the second shaft hole, and the eccentric shaft part is inlinkage fit with the driven part. The base body forming of the driving structure is easier, the production cost is effectively reduced, the eccentric shaft and the base body can be more easily mounted, and the assembling efficiency can be greatly improved.

The invention discloses a full-circle inverted buckle demolding sliding block structure, and aims to provide the full-circle inverted buckle demolding sliding block structure which improves the qualified rate of products, is high in reliability degree and comprises a sliding block, a supporting seat and a mold body, and the supporting seat is connected to the inner side of the sliding block and matched with the inner wall of a full-circle inverted buckle. An assembling space is formed between the inner wall of the sliding block and the outer wall of the supporting seat, the mold body comprises a plurality of mold bodies connected in the assembling space in a surrounding mode, the multiple mold bodies are connected in a surrounding mode to form a mold cavity used for injection molding of a full-circle inverted buckle, and the multiple mold bodies are elastically connected relative to the supporting seat. The plurality of mold bodies always have the trend of radial movement; during injection molding, the mold bodies are arranged in the assembling space, and the mold bodies are connected in a surrounding manner to form the mold cavity for injection molding of the full-circle inverted buckle; and when demolding is carried out after injection molding is completed, the mold bodies move in the radial direction relative to the outer wall of the full-circle inverted buckle so that the mold cavity can release the outer wall of the full-circle inverted buckle to complete demolding of the full-circle inverted buckle. The invention relates to the technical field of molds.

The invention discloses a displacement limiting device of a mold slide block, comprising a base and a slide block, a slide table is arranged on the base, a slide rail is arranged on the slide table, and the slide block is arranged on a slide rail along the slide rail. On the platform, a rotating pulley is installed on one side of the sliding platform, and the pulley rotates around the rotating shaft fixed on the sliding platform. A return switch is also fixed on the base, and a drawing is also provided. One end of the drawing It is fixed on the slide block, and the other end is connected to the return switch, and the return switch is connected with the driving device for controlling the sliding of the slide block. Such a limiting structure is simple and effective, can accurately limit the stroke of the slider, and effectively improves the precision of mold production, and the device has low cost and is easy to maintain, and is suitable for various small mold production.

The invention discloses a multifunctional manipulator, an automatic feeding device and an automatic feeding method. The multifunctional manipulator comprises a mounting frame, an electromagnetic adsorption device, a code reader and a first clamping mechanism are arranged on the mounting frame, the electromagnetic adsorption device is located on the side of the mounting frame, the adsorption end of the electromagnetic adsorption device faces outwards; the code reader is obliquely arranged above the electromagnetic adsorption device, and a lens of the code reader faces outwards and downwards; and the first clamping mechanism is located on the inner side of the electromagnetic adsorption device and located below the code reader. According to the scheme, the electromagnetic adsorption device is integrated on the manipulator, a drawer can be opened in an electromagnetic adsorption mode during material taking, so that subsequent material taking through the first clamping mechanism on the drawer is facilitated, the types, the quantity and the positions of reagent strips in the drawer can be accurately determined through a code scanner, data support is provided for control over the first clamping mechanism, the integration degree of equipment is greatly improved, meanwhile, a plurality of components can share one moving mechanism, and the structure can be effectively simplified.

The invention discloses a control valve used for a water heater. The control valve is installed on a water valve, the water valve comprises a valve body, a valve cavity and a valve element, and the valve element is arranged inside the valve cavity. A tubular flange extends outwards on the side wall of the valve body to form an adjusting cavity, a rotating shaft is arranged inside the adjusting cavity, one end of the rotating shaft is connected with the valve element, and the other end of the rotating shaft is connected with a handle. A limiting poking rod is arranged on the handle, limiting blocks are arranged on the outer side wall of the tubular flange, and the limiting poking rod extends into the travel region between the two limiting blocks. The control valve used for the water heater is simple and reasonable, and the opening and closing limiting structure of the valve is scientific in design and high in practicability. The end of the poking rod on the handle of the water valve is curled inwards to form a sleeve into which an assistance tool can be inserted, and using is quite convenient.

The invention discloses a double-turnover pressure head for display panel detection and a display panel detection jig. The double-turnover pressure head comprises a first overturning assembly, whereinthe first overturning assembly is provided with a second overturning assembly and a TP-FPC positioning assembly, an overturning hinge shaft on the first overturning assembly is perpendicular to an overturning hinge shaft on the second overturning assembly, the second overturning assembly is provided with a TP-FPC conduction pressure head, the TP-FPC positioning assembly is provided with a TP-FPCpositioning groove, and the TP-FPC conduction pressure head corresponds to the TP-FPC positioning groove in position. According to the invention, the interference between the main FPC and the conduction pressure head during the loading of a display panel can be effectively avoided; the TP-FPC on the display panel bound with the main FPC and the TP-FPC at the same time can be conveniently and rapidly conducted, wherein the projections of the main FPC and the TP-FPC are overlapped; and the rapid detection of the TP-FPC part can be realized.