3593 results about "Acute angle" patented technology

The invention relates to the technical field of industrial nondestructive testing, in particular to a paper drum defect full-inspection method based on machine vision, which comprises the following steps: step 1, constructing a curved surface self-adaptive optical environment: arranging annular low-angle strip-shaped light source arrays along the circumferential direction of a paper drum at equal intervals, and forming a dynamically adjusted set acute angle between the emergent direction of each light source and the surface normal of the paper drum, the acute angle is reduced along with the increase of the diameter of the paper barrel, and near-infrared coaxial diffused light sources are arranged at the two axial ends of the paper barrel; step 2, motion compensation three-dimensional reconstruction; 3, multi-modal defect hierarchical decision making: expanding the three-dimensional point cloud into a two-dimensional image along the circumferential direction, and constructing a dynamic reference grid with the grid cell size adaptively adjusted along with the pattern complexity on the two-dimensional image; cooperatively extracting geometric structure features, surface texture features and gluing seam features; and outputting defect classification through a three-level decision tree. By means of the method, efficient and accurate paper barrel full inspection can be achieved, and the automation level of a production line and the paper barrel quality control capacity are effectively improved.

An intervertebral implant for implantation in an intervertebral space between vertebrae. The implant includes a body having a front end, a rear end and a pair of spaced apart first and second side walls extending between the front and rear ends. The front and rear ends extend in a transverse direction and a central axis of the body extends from the rear end to the front end. The rear end defines a first fastener hole having a first central axis and a second fastener hole having a second central axis. The first and second central axes extend parallel to one another at an acute angle relative to the body central axis in the transverse direction.

The invention relates to a cleaning equipment brush head, cleaning equipment and a cleaning system, and the cleaning equipment brush head comprises a main body part which comprises an air suction opening; the rolling brush is arranged on the main body part and can rotate relative to the main body part; the comb teeth are installed on the main body part, each comb tooth comprises a plurality of tooth parts arranged in the first direction, and a first acute angle is formed between the extending direction of at least part of the tooth parts and the first direction; wherein the first direction is the axis direction of the rolling brush. The brush head of the cleaning equipment has better anti-winding capability.

An undercarriage, a middle large rotor and a middle large motor are connected to the lower portion of a fuselage body and sequentially connected to the top of a middle small tower, and the right front portion, the left front portion, the left rear portion and the right rear portion of the fuselage body are correspondingly connected with a right front fuselage arm, a left front fuselage arm, a left rear fuselage arm, a right rear fuselage arm and a power assembly. The connecting line of the rotating centers of the rotors of the four power assemblies is square or rectangular, the rotating directions of the rotors of the power assemblies at the same opposite angles are the same, the rotating directions of the rotors of the power assemblies at different opposite angles are opposite, and the rotating faces of the two rotors opposite to the middle large rotor in rotating direction incline around the axes of the respective arms. The included angle between the rotating surfaces of the two rotors and the horizontal plane is an acute angle beta, the rotating surfaces of the two rotors with the same rotating direction as the middle large rotor incline around respective arm axes, the included angle between the rotating surfaces of the two rotors and the horizontal plane is an acute angle theta, beta is larger than theta, the reaction torque and the horizontal component torque of the rotors jointly drive the aircraft to steer, and the aircraft has the advantages of being long in endurance time, large in load and high in wind resistance. And a universal flight platform is formed.

A guardrail post includes a first post wall formed at a first post side of the guardrail post; a second post wall formed at a second post side of the guardrail post and arranged at an acute angle relative to the first post wall; and a substantially V-shaped notch defined between the first post wall and the second post wall, the substantially V-shaped notch configured to receive a pillar edge of a pillar.

An adjustable multi-use chair is provided with two adjustable chair backs and armrests, and the height of a first chair back is adjustable; an angle between a second chair back and a seat surface of a seat is adjustable, such that the second chair back can function as a chair back or a desk; and angles between inner sides of the two armrests and the seat surface of the seat can be separately adjusted to a plurality of angles from an acute angle to a reflex angle, and users can adjust the armrests according to their preferences to sit forward, lie on the side, sit laterally or backward on the chair and can change their sitting position without being limited by the armrests; and the whole chair is easy to adjust and can be adjusted in multiple ways to satisfy different adjustment requirements of users.

The utility model relates to a kitchenware and kitchenware set, said kitchenware comprises a main body with an outer wall, a bottom and a handle, the handle can vertically rotate between a first working position and a second folding position, in the first working position, the handle is oriented to extend away from the outer wall, the near end of the handle is rotatably fixed to the kitchenware through a connecting part, and the near end of the handle is rotatably fixed to the kitchenware through a connecting part. A gripping member is arranged at the far end of the handle, a cavity is formed in the handle, the cavity is provided with a locking assembly, the locking assembly comprises a locking member configured to move between a locking position and an unlocking position, and the near end of the locking member comprises an upper surface which is at an acute angle relative to the plane of the handle. The connecting portion includes a recess having an upper surface that is at an acute angle relative to the plane of the handle, the angled upper surface of the locking member engaging a first contact point on the acute-angled upper surface of the connecting portion in a first locked position.

An axial fan assembly includes a first axial fan and a second axial fan arranged side by side. The second axial fan includes an impeller having a shaft, and a frame. The frame includes a surrounding wall and a lateral guiding structure. The surrounding wall forms an axial flow channel for accommodating the impeller, wherein the surrounding wall includes a first outer wall surface facing the first axial fan, and an airflow generated by the impeller flows out of the axial flow channel through an outlet end. The lateral guiding structure is protrudently disposed at the outlet end on an edge surface connected with the first outer wall surface, wherein the lateral guiding structure guides a partial airflow of the airflow at the first edge surface toward a first direction, and the first direction and a normal direction of the first outer wall surface include a first acute angle.

The invention provides a turning and drilling combined machine tool, which belongs to the technical field of hub production and comprises a tool body, a stand column, a sliding table, a tool turret, a drilling main shaft and a workpiece main shaft. The rotating center of the cutter head is controlled to form the acute angle distribution with the vertical direction, it is ensured that other turning tools are away from a workpiece during machining and do not interfere with the workpiece, meanwhile, compared with a traditional structure, the radial distance from a contact point when the turning tools make contact with a hub to the axis of the cutter head is greatly reduced, the overall rigidity of the tool turret is good, and the machining efficiency is improved. And the machining precision can be improved. Moreover, according to the turning and drilling combined machine tool, the drilling main shaft is arranged on the tool turret, drilling machining can be achieved, part of hole sites machined in a traditional three-sequence mode can be advanced to be machined in a first sequence or a second sequence in practical application, and therefore the production rhythm is adjusted, the machining time of the hub is shortened, and the production efficiency is improved. And a structural foundation is provided for realizing machining of the whole hub by one machine tool.

The invention discloses a defect detection method, device and equipment, a medium and a product. The method comprises the following steps: acquiring a sheet image of a to-be-detected sheet; the sheet to be detected is a light-transmitting sheet; the sheet image is an image of a light band area presented by a second surface of the to-be-detected sheet by imaging equipment when a linear light source irradiates the first surface of the to-be-detected sheet at a preset incident angle; the preset incident angle is an acute angle; and determining a defect detection result of the to-be-detected sheet according to the sheet image. According to the technical scheme, the problem that the defect type of the light-transmitting sheet is difficult to detect is solved, accurate detection of multiple types of defects is achieved based on the imaging difference of the defects under the low-transmittance line light source, the defect detection precision of the light-transmitting sheet is improved, and the defect type detection range is expanded.

The invention discloses an edge trimmer for lithium ion battery diaphragm processing, and relates to the technical field of battery diaphragm processing, the edge trimmer comprises a rack assembly, and a diaphragm feeding conveying system, an edge trimming system, a diaphragm discharging conveying system and a rolling assembly are sequentially arranged on the rack assembly in the diaphragm conveying direction; the edge cutting system is obliquely arranged, the inclination direction is lowered from the film inlet conveying system to the film outlet conveying system, horizontal conveying of diaphragms is changed into inclined conveying through the inclination fall of the two ends of the edge cutting system, on one hand, the wrap angles of the diaphragms and all conveying rollers are increased, and the supporting stability of the diaphragms is improved; and on the other hand, an acute angle is formed between the pull-down trimming and the cutting wheel in the trimming system, so that the cutting wheel can enter the diaphragm more smoothly, the diaphragm cutting is more stable, meanwhile, the trimming assembly is further provided with a cutting structure capable of adjusting the distance, the whole edge trimmer can be further suitable for machining of diaphragms of various models, and the cost is saved.

The invention discloses a device for controllable acute-angle back bending of a micro guide wire in cerebrovascular interventional operation, and belongs to the technical field of interventional operation instruments, the device comprises a conveying catheter, a pushing structure is arranged in an inner cavity of the conveying catheter, the pushing structure can move in the inner cavity of the conveying catheter in the axial direction, the pushing structure comprises a pushing sleeve, the micro guide wire is arranged in the pushing sleeve, and the pushing sleeve is connected with the micro guide wire. The micro guide wire can slide and rotate in the conveying sleeve; a side crack hole is formed in the side part of the head end of the conveying catheter, the micro guide wire penetrates through the head end part of the pushing sleeve to be plastically bent into an arc-shaped section structure, is bent from the side crack hole and then extends out, and the pushing sleeve axially moves in the conveying catheter, so that the bending degree of the micro guide wire extending out of the side crack hole can be changed; and after the micro guide wire extends into the target blood vessel for a certain distance, the micro catheter follows the micro guide wire to enter the target blood vessel. The technical problem that a micro guide wire and a micro catheter are difficult to cross a reverse acute angle formed by a responsibility blood vessel and a mother blood vessel to enter a path blood vessel in a super-selection mode to conduct an operation can be solved.

A connector for connecting a medical implant to a delivery catheter includes a proximal portion and a distal portion connected to the proximal portion via a central portion. The proximal, distal and central portions extend along a central axis (A). A distal end of the distal portion facing away from the central portion. At least one recess is formed in the central portion and in the distal portion. The at least one recess is configured to receive a connecting element of the medical implant configured to connect the medical implant to the connector. The distal portion tapers towards the distal end. The distal portion can include a conical section, and an outer surface of the conical section includes a generatrix that encloses an acute angle (α) with the central axis (A), with the acute angle (α) in the range of between 20° and 60°.

The invention provides an enhanced heat conduction lubrication type ball bearing for an X-ray tube and a CT bulb tube. The enhanced heat conduction lubrication type ball bearing comprises a bearing sleeve, a sealing end cover, a bearing raceway, a fixing shaft, a sealing baffle and a ball. A bearing cavity for accommodating the bearing raceway is formed in the bearing sleeve, the bearing cavity is filled with liquid metal, gaps among the bearing raceway, the balls and the fixed shaft are filled with the liquid metal, and the fixed shaft is filled with a flowing heat dissipation medium; the two ends of the bearing sleeve are a closed end and an open end respectively, a sealing step is arranged at the open end, movable sealing grooves are formed in the end face of the sealing step and the end face of the sealing end cover, each movable sealing groove comprises two flow channels intersecting at an acute angle, and a sealing groove and a backflow hole communicated with the movable sealing grooves and the sealing groove are formed in the sealing end cover. The anode assembly has good lubricity, heat dissipation capacity and conductivity, the operation stability is improved, the service life is prolonged, and the heat dissipation power of the anode assembly is greatly improved.

The invention relates to the field of photovoltaic technology, in particular to a photovoltaic backboard, a preparation method thereof and a photovoltaic module. The photovoltaic backboard comprises a base material layer, a structural layer, a reflecting layer and an inner coating, the base material layer is provided with a bearing surface, the bearing surface is provided with a plurality of battery areas and light reflecting areas, and the light reflecting areas are arranged around the battery areas; the structural layer is located on the reflective area, the structural layer is provided with a plurality of raised structures which are arranged in a directional mode, and the included angle between the arrangement direction of the raised structures and the edge of the reflective area is an acute angle; the reflecting layer covers the structural layer; and the inner coating layer is positioned on the battery region. The photovoltaic backboard provided by the invention is high in energy utilization rate, effectively improves the durability and reliability of the photovoltaic backboard, and facilitates the improvement of the power generation efficiency and the service life of a photovoltaic module.

A locking-mode-selectable lock bolt and nut device comprises a bolt and a nut, the main fastening nut is arranged on the bolt in a sleeving manner; the fixed locknut is arranged on the bolt in a sleeving manner and is positioned above the main fastening nut; wherein a bolt locking groove is formed in the outer wall of one side of the bolt in the length direction, the section of the bolt locking groove is triangular, an acute angle is formed by two side faces in the bolt locking groove, one side face is arranged in the radial direction of the bolt, and the other side face is an inclined face; mounting through holes are symmetrically formed in two opposite surfaces of the fixed locknut, and a screw hole, a round hole and a square hole are sequentially formed in each mounting through hole from outside to inside; the inner diameter of the round hole is larger than that of the screw hole, and the width of the square hole is smaller than that of the round hole. And the two locking assemblies are respectively inserted into the two mounting through holes of the fixed locknut.

A linkage device for implementing no backrest clearance, a supporting frame, a seat unit, and a seat, including a bottom base, a linkage mechanism, a support side plate, and a backrest mechanism; the support side plate is provided with a side plate linkage point and a backrest point; the support side plate is rotatably connected to the linkage mechanism at the side plate linkage point; the support side plate is rotatably connected to the backrest mechanism at the backrest point; the backrest mechanism includes a backrest mounting member and a backrest linkage member; and when the backrest mechanism is retracted to an ultimate position, an included angle α between a connecting line between two ends of the backrest mounting member and a connecting line between the backrest point and the side plate linkage point is an acute angle.

An apparatus for a vehicle loadspace of a vehicle, comprising: a storage container (603); a panel (108) configured to pivot via a first hinge means (300) between a stowed orientation and a deployed orientation, wherein in the stowed orientation the panel (108) is above the storage container (603), and wherein the panel (108) is configured to pivot through an acute angle to move from the stowed orientation to the deployed orientation; a first cushion member (200), configured to attach to a vehicle loadspace attachment point (350) by a first coupling (401) and movable via the first coupling (401) between a stowed position in the storage container (603) and a deployed position outside the storage container (603), wherein the first coupling (401) is configured to locate the first cushion member (200) when the first cushion member (200) is in the deployed position outside the storage container (603).

In a first aspect, a cradle of a device for upending of a pile is provided with movable fender pads at respective lateral sides of the cradle. The fender pads form, together with a base support against which the pile rests backwardly during upending, inward surfaces of the cradle defining an internal space inside the cradle for the pile to which radial movement of the supported pile is limited. Each fender pad is controllably movable by one or more fender actuators into slanted fending positions, in which the fender pad slants towards the base support at sharp angles relative to the middle plane. In a second aspect, a pile end support structure has left and right connector beams hinged at an upper end thereof to the cradle and a pile support beam hinged at both ends to the lower ends of the connector beams. The connector hinge axes and the support hinge axes are horizontal when the pivotal structure together with the pile are in the vertical position.

A semiconductor device includes a metal line having a longitudinal axis. The metal line includes a first segment extending in a direction of the longitudinal axis and having a first cross-section, the first cross-section including a wider side and a narrower side. A second segment extends in a direction of the longitudinal axis and has a second cross-section, the second cross-section including a wider side and a narrower side. The narrower side of the second segment is formed in contact with the wider side of the first segment such that a portion of the wider side of the first segment extends beyond the narrow side of the second segment to form a terrace and the terrace and a tapered sidewall of the second segment form an acute angle.

The present application provides a zoom lens and an electrical device, the zoom lens includes: lens piece set including a first optical lens piece; a lens piece bracket including a bracket main body, where in a first optical lens piece is disposed securely on the bracket main body; a lens barrel sleeved around the lens piece bracket, wherein sliding slots are defined in the lens barrel, an included angle between an extension direction of the sliding slots and a plane in which the lens piece set is located is an acute angle or obtuse angle; a focusing ring sleeved around the lens barrel, wherein guide slots are defined in the focusing ring, and an extension direction of the guide slots is perpendicular to the plane in which the lens piece set is located.

A hand tool includes a first handle forming a channel, and a second handle including a cutting member. A linkage is attached in pivotal arrangement to the first handle at the channel and to a cutting blade. The cutting blade is attached in pivotal arrangement to the second handle. The first handle is pivotally attached to the second handle via a fastener. The first handle includes a first portion, and a second portion includes a handle grip. The first portion extends substantially along a first reference axis, and the second portion extends substantially along a second reference axis. The first reference axis and the second reference axis extend at an acute angle relative to one another. The channel extends substantially along the first reference axis at the first portion.

The electroplating device comprises a membrane frame and an ionic membrane, the ionic membrane is arranged at the bottom of the membrane frame, the membrane frame comprises a plurality of first spraying holes used for discharging cathode liquid, a first preset included angle is formed between the liquid outlet direction of the first spraying holes and the vertical downward direction, and the first preset included angle is an acute angle. Cathode liquid discharged by the first jet holes downwards scours the ionic membrane, the flowability of a flow field on the lower layer of the cathode cavity is promoted, crystal precipitation is reduced, and voltage rise between an anode and a substrate caused by continuous increase of resistance between the anode and the substrate of the electroplating device is prevented.

The invention provides a method for quickly positioning the instant center of a finger joint and a rehabilitation glove following the instant center, the method for quickly positioning the instant center of the finger joint comprises the following steps: A, keeping a finger in a half-bending state, and making a straight line collinear with the outer contour of each knuckle of the finger; b, folding lines of all joints are made through straight lines and finger knuckles, and geometric center lines of the fingers are made through the folding lines; c, making a positioning circle tangent to the fold lines of the joints and the geometric center line of the finger in an acute angle space formed by the fold lines of the joints and the geometric center line of the finger; d, the positioning circle radius R1 at the metacarpophalangeal joint of the finger is larger than or equal to 1 mm and smaller than or equal to 2.5 mm, and the positioning circle radius R2 of the near-end interphalangeal joint and the far-end interphalangeal joint of the finger is larger than or equal to 0.5 mm and smaller than or equal to 2 mm; e, in engineering application, the equivalent instantaneous center of the metacarpophalangeal joint varies within the range of a positioning circle with the radius being R1, and the equivalent instantaneous centers of the near-end interphalangeal joint and the far-end interphalangeal joint varies within the range of a positioning circle with the radius being R2.

The invention provides a folding mechanism and electronic equipment. The folding mechanism comprises a main shaft, a first fixing frame, a second fixing frame, a first movable part, a second movable part, a first supporting plate, a second supporting plate and a first elastic part. The first movable part is connected with the spindle and the first fixed frame; the second movable part is connected with the spindle and the second fixed frame; the first supporting plate is connected with the first fixing frame and the first movable part, and the second supporting plate is connected with the second fixing frame and the second movable part. The first elastic piece is connected with the first supporting plate and the first fixing frame and is in a compressed state, the first force application point is located on the side, away from the main shaft, of the first rotating axis, and when the folding mechanism is in a folded state, a first included angle formed by a connecting line between the first force application point and the second force application point and the first supporting face in the first direction is an acute angle. The end, close to the main shaft, of the first supporting plate is opened in the direction away from the second supporting plate. The screen containing space defined by the first supporting plate, the main shaft and the second supporting plate is enlarged.

The invention discloses a building facade exterior wall brick bump identification method, and belongs to the technical field of building facade maintenance, the identification method depends on an unmanned aerial vehicle, the unmanned aerial vehicle is provided with a camera and a controller, and the controller is used for identifying an image shot by the camera; the identification method comprises the steps that the unmanned aerial vehicle is controlled to fly according to a preset path, the transverse shooting angle of a camera is adjusted so that the camera can face the exterior wall tiles of the building facade at an acute angle, and images of the exterior wall tiles are shot at a fixed visual angle regularly and sent to a controller; when the unmanned aerial vehicle is at a reference detection height, the controller constructs a theoretical two-dimensional grid template for the identified vertical gaps and transverse gaps; the problems that in existing building external wall brick bump detection, manual inspection visual angle deviation is caused, efficiency is low, danger is high, and bump recognition and severity evaluation are inaccurate due to the fact that three-dimensional features are difficult to highlight through front-view image shooting are solved.

The utility model discloses a strut bearing with a high lubrication effect. The strut bearing comprises an upper shell, a lower shell and an antifriction gasket ring, the upper shell comprises an upper shell body and an inclined face arranged on the upper shell body. And the included angle between the inclined plane and the central axis of the upper shell on the cross section along the arrangement direction of the upper shell and the lower shell is an acute angle. The lower shell comprises a lower shell body and a containing groove formed in the lower shell body. The antifriction gasket ring is contained in the containing groove, and the antifriction gasket ring is integrally formed. According to the strut bearing, the requirements of axial and radial loads of the strut bearing can be met, meanwhile, material waste can be reduced as much as possible, the lubricating effect can be improved due to the arrangement of the multiple oil storage grooves, and the service life of the strut bearing is further prolonged.

A set of building panels including similar or essentially identical building panels. Each building panel includes a first mechanical locking device configured to horizontally and vertically lock a first edge of a building panel to a second edge of an adjacent building panel. The first mechanical locking device includes, at the second edge, a locking tongue configured to be received in a tongue groove arranged in the first edge. The locking tongue has, in an upper portion, an impact surface extending at an acute angle in relation to the horizontal plane and the tongue groove has, in an upper portion, an impact surface extending in an acute angle in relation to the horizontal plane, configured to cooperate with the impact surface of the locking tongue in an assembled position, when a force, acting, at least partially, in a vertical direction, is applied to at least one of the building panels.

A lightweight composite roofing support system comprises a longitudinally-extending core member comprising a longitudinally-extending first roof contact side comprising a first edge and opposed second edge, a longitudinally-extending second side comprising a second side working surface having a second width and a second length that is greater than the second width, the second side tapering toward the first edge at a first predetermined acute angle, and a longitudinally-extending third side comprising a third side working surface having a third width and a third length that is greater than the third width, the third side tapering toward the second edge at a second predetermined acute angle that is different than the first predetermined acute angle, a first end comprising an integral first recess defining a first handle, and an opposed second end comprising an integral second recess defining a second handle, the core member comprising a wedge-shaped lateral cross-section.

A measurement method measures bonding strength by peeling off a semiconductor chip bonded to a main surface of a substrate by using a blade having a first tool part, which has a blade angle as a first acute angle, and a second tool part provided on first tool part. The method includes: inserting first tool part along main surface toward a chamfered outer peripheral edge part of chip; while first tool part is inserted into the edge part, peeling off chip from substrate by bringing second tool part provided on first tool part into contact with the edge part of chip and applying a force to chip away from substrate; and measuring bonding strength between substrate and chip based on a length from a contact point where first tool part or second tool part comes into contact with chip to a point where chip and substrate are peeled apart.