1985 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 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.

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.

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.

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).

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 invention relates to a geometric optimization method for copper sheet layout, computer equipment, a storage medium and a product. The geometric optimization method is used for optimizing an acute angle structure of a copper sheet in the design and manufacturing process of a printed circuit board, and comprises the following steps: providing a polygonal copper sheet area, and obtaining vertex coordinate data of the polygon; constructing a first geometric model corresponding to the polygon according to the vertex coordinate data, and traversing vertexes of the polygon in the first geometric model; defining two adjacent vertexes of the vertexes as a preorder vertex and a postorder vertex respectively, and judging whether an included angle formed by connecting lines among the preorder vertex, the vertexes and the postorder vertex is an acute angle or not; when the included angle is an acute angle, calculating a common tangent circle corresponding to the included angle, and constructing a second geometric model corresponding to the common tangent circle; and based on the second geometric model, carrying out smoothing processing on the area with the included angle being the acute angle to obtain an optimized copper sheet layout.

The invention discloses a stopping device and a lifter, the stopping device and a lifting track synchronously ascend and descend, and the stopping device comprises a shaft seat, a stopping rod and an elastic part. And the shaft seats are arranged above the lifting track at intervals. The stop lever comprises a top pressing part, a stop part and a rotating part connected between the top pressing part and the stop part, the top pressing part and the stop part are arranged up and down, an included angle with an opening facing the inner side of the lifting track is formed between the top pressing part and the stop part, the rotating part is pivotally connected with the shaft seat through a first shaft, and the stop lever can swing around the axis of the first shaft so as to be switched between a first position and a second position; at the first position, the included angle between the jacking part and the horizontal plane is an acute angle, and the stopping part inclines towards the inner side of the lifting track to stop the crown block; at the second position, the stopping part swings towards the outer side of the lifting track to release the crown block; the elastic part is used for limiting the stop lever at the first position when the jacking part is not jacked, and the elastic part elastically deforms and allows the stop lever to move to the second position when the jacking part is jacked.

A pressing tool includes a housing and pressing jaws arranged outside the housing. One or both pressing jaws can be pivoted into the open position by a user's hand acting upon the respective pressing jaw that faces the housing. An actuating switch is formed on a pin-like holding projection having a longitudinal extent with a free end which protrudes from the housing at an acute or right angle. A dimension of the holding projection transverse to the longitudinal extent is smaller than a smallest diameter of the hand region.

The invention belongs to the technical field of medical instruments, and discloses an imaging catheter which comprises a first stroke tube, a transmission tube and a probe structure, the transmission tube movably penetrates through the first stroke tube, the probe structure comprises a mounting sleeve and an optical fiber assembly, and the near end of the mounting sleeve is connected with the far end of the transmission tube and located in the first stroke tube; the installation sleeve is provided with an installation channel in the axial direction, the periphery of the installation sleeve is provided with a through hole communicated with the installation channel, the optical fiber assembly comprises an optical fiber and a prism, the optical fiber penetrates through the transmission pipe, the prism is fixedly arranged in the installation channel, the far end of the optical fiber is connected with the near end of the prism, and the light-transmitting end face of the prism is perpendicular to the axis of the installation sleeve. The reflecting end face of the prism and the axis of the mounting sleeve form an acute angle, the generatrix, close to the through hole, of the prism coincides with the axis of the mounting sleeve and is longer than other generatrix of the prism, and light beams transmitted by the optical fiber can be reflected out of the through hole through the reflecting end face of the prism. The imaging catheter provided by the invention can reduce light beam loss and improve imaging quality.

The invention discloses a hair cutting assembly, which comprises a rigid stationary knife and a base, the stationary knife is fixed on the base, a plurality of side stationary knife teeth are arranged on a stationary knife body, the top surfaces of the stationary knife body and the side stationary knife teeth are used as skin contact surfaces, the left side and the right side of each side stationary knife tooth are respectively provided with a first knife edge with an acute angle; a movable cutter capable of moving left and right is arranged below the fixed cutter, side movable cutter teeth located below the side fixed cutter teeth are arranged on the movable cutter, second cutting edges with acute angles are arranged on the left side and the right side of the side movable cutter teeth respectively, and a middle installation hole is formed in the position, located on the inner sides of the side fixed cutter teeth, of the middle of the fixed cutter body. A middle cutter net which is exposed upwards from the middle mounting hole is arranged between the base and the fixed cutter, and a middle cutter assembly is arranged below the middle cutter net. The hair cutting assembly has the advantages of being sharp in cutting, good in safety, small in size and comfortable in skin feeling.

A profile frame system for sliding elements includes a first and second metallic frame profiles, a one-piece insulating support bar made of plastic with a first upper bar plane and a second lower bar plane parallel to the first bar plane. Each bar plane has, on both longitudinal sides, roll-in heads rolled into respective grooves in the first and the second frame profile and thus connect the two frame profiles, wherein in the insulating support bar above the first upper bar plane a snap-in geometry oriented on the longitudinal side is provided, in which a runner is snapped-in. The first upper bar plane is connected to the second lower bar plane with two support struts. These support struts are arranged to diverge from one another at an acute angle α, starting from the snap-in geometry in the first upper bar plane and extending towards the second lower bar plane.

The utility model discloses a lithium battery diaphragm tensile strength tester, relates to battery diaphragm technical field, including the clamping subassembly, it is equipped with two groups, each group of clamping subassembly includes cross bar, connecting piece, linkage rod and splint, the cross bar is connected to vertical plate side, cross bar far away from vertical plate one end is rotatingly connected with connecting piece, and the connecting piece is connected with the linkage rod. The connecting pieces and the top of the transverse rod are arranged in an acute angle mode, the other ends of the connecting pieces are rotationally connected with the linkage rods, the linkage rods are rotationally connected with the clamping plates, a middle rod is rotationally connected between the two linkage rods, and an elastic piece is arranged between the middle rod and the transverse rod. The group of clamping assemblies stretch the diaphragm in the direction far away from the fixed end through the horizontal moving structure, and when the vertical plate moves to drive the connecting piece to rotate, the upper linkage rod and the lower linkage rod are further driven to rotate in opposite directions, so that the clamping plates can clamp the tested diaphragm more and more tightly, and the tested diaphragm can be prevented from falling off.

A method for assisting a heart ventricle can comprise providing a longitudinally expandable member that is reversibly expandable along a longitudinal dimension, wherein the longitudinally expandable member can include adjacent abutting portions meeting at respective bends that form acute angles along the longitudinal dimension. The method can include securing a first end portion of the longitudinally expandable member to a first wall portion of the heart ventricle via a first anchor engagement feature associated with the first end portion. The method can include securing a second end portion of the longitudinally expandable member to a second wall portion of the heart ventricle via a second anchor engagement feature associated with the second end portion, the plurality of bends between the first and second end portions allowing augmenting expansion of the heart ventricle using spring force of the longitudinally expandable member to thereby improve heart function.

Disclosed herein is a hand-held power tool including a motor housing, a motor in the motor housing, an auger coupled to the motor and having a rotational axis, and a first handle coupled to the motor housing and including a grip. In some embodiments, the rotational axis of the auger and an axis of the grip subtend to an acute angle.

The utility model provides a curettage tool for apical surgery, which comprises a handle, a neck part and a curettage head, the handle is connected with the curettage head through the neck part, the neck part is bent by 80-100 degrees, the curettage head is shovel-shaped, and one end of the curettage head far away from the neck part is provided with a tip. Through the shovel-shaped design of the digging spoon head, the digging spoon can extend into the position where tooth roots are difficult to scrape, and the problem that the included angle between the root tip lesion lingual side and the tooth surface is an acute angle and is difficult to scrape thoroughly is solved. By means of the specially designed angle, diseased tissues right behind and behind the tooth root can be scraped more effectively, residues of granulation tissues can be reduced, the healing speed of root apex bone defects is increased, and the operation efficiency is improved.

The embodiment of the invention discloses an optical system and head-mounted display equipment. In a specific implementation scheme, the optical system comprises an image source; the first prism is provided with a first surface, a second surface and a third surface, and the first surface of the first prism is close to the image source; a first lens located between the image source and the first prism; the second surface of the first prism is located on the side, away from the second prism, of the first prism, and the third surface of the first prism is located on the side, close to the second prism, of the first prism; the second lens is located on the side, away from the first prism, of the second prism, a first included angle between the first surface of the second prism and the optical axis of the second lens and a second included angle between the third surface of the first prism and the optical axis of the second lens are acute angles, and the first included angle is equal to the second included angle; the first film layer is located on the second surface of the first prism and can reflect light rays and transmit the light rays; and the second film layer is located on the first surface of the second lens and can reflect light.

The utility model discloses a composite material support with a C-shaped cross section and a negative angle and a forming die thereof, the composite material support comprises a body with a C-shaped cross section, the body comprises an upper plate, a middle plate and a lower plate, one edge of the upper plate is connected with the upper edge of the middle plate into a whole, the lower edge of the middle plate is connected with one edge of the lower plate into a whole, and the lower plate is connected with the lower plate into a whole. A C-shaped structure is defined by the upper plate, the middle plate and the lower plate, an integrated rectangular frame is defined after a C-shaped opening of the body faces outwards, the upper plate on the two opposite edges of the rectangular frame is of a negative angle structure, namely the upper plate inclines outwards and downwards, so that the included angle between the upper plate and the middle plate is an acute angle, and the lower plate and the middle plate form a right angle. The upper plates and the middle plates of the other two opposite frames of the rectangular frame are perpendicular, and the lower plates and the middle plates are perpendicular. The composite material support is low in machining cost and high in specific strength and specific stiffness.

The invention provides a torque arm part clamping device and method. The torque arm part clamping device comprises a base plate, a clamp and a cushion block assembly. The clamp comprises a first base, a pressing plate and a pressing rod, one end of the pressing rod is connected to the first base, and the other end of the pressing rod is connected to the pressing plate so that the pressing plate can apply pressure. The two clamps are symmetrically arranged in the X direction, and an acute angle is formed between the two first bases. The multiple cushion block assemblies are arranged between the two clamps, and the multiple cushion block assemblies are arranged in the Z direction; the cushion block assembly comprises a second base and at least one ejector rod connected to the upper end of the second base in a threaded mode. The first base and the second base are installed on the base plate. The online measuring system of the machine tool is utilized, the thought of automatic, reliable and efficient alignment and judgment is achieved, the B shaft of the part is rapidly aligned, it is guaranteed that the allowance of all end faces, namely holes, is uniform, and the tool connecting problem of appearance machining and end face finish machining is solved.

The present disclosure relates to a vehicle ramp, comprising a ramp body formed by an acute-angle front ramp portion and a rear ramp portion. The core innovation lies in the pivotally connected rotatable anti-slip washer at the lip edge of the front ramp portion: when deployed, it forms a ground transition extension zone, where a reverse static friction force is generated between the washer and the ground utilizing the downforce of the tire, which effectively prevents rearward sliding displacement of the ramp. The washer achieves deployment and locking through the nesting of the protrusion and hollowed-out area, and when retracted, it is secured by a latching block within the groove to maintain the cleanliness of the friction surface.

The utility model relates to the technical field of electronic product function testing, in particular to a plugging jig and a testing device. The base is provided with a first bearing plane, and the first bearing plane comprises a to-be-tested circuit board placing area; the mobile platform is slidably arranged on the first bearing plane, the mobile platform is provided with a second bearing plane, the second bearing plane inclines towards the direction close to the to-be-tested circuit board placing area, the included angle between the direction of the second bearing plane and the direction of the first bearing plane is an acute angle, and the second bearing plane is used for bearing a test line; the driving assembly is used for driving the mobile platform to slide to be close to the to-be-tested circuit board placement area; the driving assembly is also used for driving the mobile platform to slide away from the to-be-tested circuit board placement area. The automatic plugging of the test wire is realized, and the plugging action of the test wire is more standard, so that the damage to the connector is reduced. And the test line on the second bearing plane is obliquely arranged, so that the abrasion of the connector can be reduced compared with the mode that the connector is inserted in parallel.

A connection between substantially planar panels is disclosed. A panel comprises a panel body, said panel body comprising a pair of planar members, deployed in parallel spaced arrangement, and connected by an outer side wall. A connection assembly extends circumferentially from each panel body, with a connection assembly including a planar connection surface for engaging in a plane a corresponding connection surface on a second panel. The planar connection surface and the side wall defining an acute angle, wherein said plane is at an angle of 2°-8° to the plane of the panel bodies.

The invention provides a heat exchange plate, a plate heat exchanger and a heat exchange system, a plurality of first protrusions and a plurality of first recesses of a first microtuple of the heat exchange plate are alternately arranged in the width direction, and a plurality of second protrusions and a plurality of second recesses of a second microtuple of the heat exchange plate are alternately arranged in the width direction. The first protrusion corresponds to the second recess in the length direction, the second protrusion corresponds to the first recess in the length direction, the first welding face of the first protrusion is provided with a first long side shaft and a first short side shaft, and a first dip angle is formed between the first long side shaft and the length direction. The plurality of first inclination angles of the same first micro-element group are gradually reduced from one side to the other side in the width direction, and the first inclination angles are acute angles. According to the heat exchange plate, the flowing dead zone area can be effectively reduced to increase the effective heat exchange area while uniform distribution of the flowing speed is achieved, the multi-direction disturbance capacity to a fluid medium can be effectively enhanced, the flowing speed uniformity is further improved, and the heat exchange performance is improved.

The utility model relates to a cleaning equipment brush head, cleaning equipment and a cleaning system. The cleaning equipment brush head comprises a main body part; 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.

A traction machine utilizing a traction wheel to dissipate heat relates to the traction machine technology and comprises a permanent magnet synchronous traction machine shell, a stator, a rotor, a rotating shaft and the traction wheel, the traction wheel is fixed on the rotating shaft penetrating out of the permanent magnet synchronous traction machine shell and comprises a supporting sleeve, an outer ring and a plurality of fan blades, and a rope groove is formed in the outer circle surface of the outer ring. The fan blades are evenly distributed around the axis of the rotating shaft and connected between the supporting sleeve and the outer ring, the included angle between the fanning face of each fan blade and the axis of the rotating shaft is an acute angle, wide gaps are formed between the traction wheel and the end face, facing the traction wheel, of the permanent magnet synchronous traction machine shell, and ventilation channels are formed between the fan blades and the wide gaps. Compared with the prior art, the permanent magnet synchronous traction machine has the advantages that the heat dissipation performance is good, the traction wheel is convenient to replace, and the permanent magnet synchronous traction machine can be efficiently cooled without dust entering the traction machine.

The present invention provides a fastener alignment guide comprising a generally planar body and an angled element arranged at an acute angle θ to the body, a first aperture arranged through the angled element and a second aperture arranged through the body, wherein the first aperture and the second apertures are aligned such that a fastener may be inserted progressively through the first and second apertures in use. The present invention also provides a slip-resisting fastener alignment guide comprising a body at least partially arranged in a first plane, the body comprising a first aperture for receiving, in use, at least a portion of a shank of a fastener; and a guidewall extending out of the first plane for guiding the fastener, in use, into the first aperture at an acute angle α to the first plane, wherein the guidewall comprises a first bearing edge or surface upon which an underside of a head of the fastener can bear in use, the body further comprises a second bearing edge or surface upon which the underside of the head of the fastener can bear in use, and the first bearing edge or surface and the second bearing edge or surface are each configured / arranged to resist movement, in use, of the fastener alignment guide relative to the fastener in a first direction parallel to the first plane.The present invention also provides a method of forming the fastener alignment guide and slip-resisting fastener alignment guide.

The invention belongs to the technical field of structural engineering, and relates to a self-resetting lateral force resisting module suitable for a beam through type frame. According to the technical scheme, a rotating support is an obtuse-angle triangular frame composed of an inclined support and a horizontal beam, the obtuse-angle top of the obtuse-angle triangular frame is hinged to the bottom of an upper-layer main beam of a beam-through type frame, and the center of the horizontal beam of the obtuse-angle triangular frame is connected with a thorn ring-disc spring reset system; the acute angle of the obtuse triangle frame is connected with an inner wedge-shaped plate-disc spring reset system and an outer wedge-shaped plate-disc spring reset system; the viscoelastic damping groove is connected to the lower portion of the horizontal beam and located between the thorn ring-disc spring reset system and the inner wedge-shaped plate-disc spring reset system and the outer wedge-shaped plate-disc spring reset system. The bottoms of the thorn ring-disc spring reset system, the viscoelastic damping groove, the inner wedge-shaped plate-disc spring reset system and the outer wedge-shaped plate-disc spring reset system are fixedly connected with the upper portion of a lower layer main beam of the beam through type frame. The characteristics of a beam through type steel frame are fully matched, and the weak layer effect of the beam through type steel frame in the application of a high-rise building structure in the background technology is solved.

The utility model relates to the technical field of mounting brackets, and discloses a quick-release bracket assembly and a tire pressure sensor. The quick-release bracket assembly comprises a first bracket and a second bracket; the first support and the second support are the same in structure and each comprise an abutting plate and a clamping plate which are arranged in an acute angle mode, and a clamping hook is arranged at the free end of each clamping plate. The first support and the second support are arranged in a mirror symmetry mode, and the free end of the abutting plate on the first support and the free end of the abutting plate on the second support are oppositely arranged. The first support is used for being hooked to the installation equipment from one side through the clamping hook, then the abutting plate extrudes the edge of one side of the bottom of the installation equipment through stress, the abutting plate is attached to the bottom of the installation equipment after deformation, and finally the first support is fixedly connected with the installation equipment. The second bracket is connected to the mounting device from the other side in the same manner as the first bracket. By means of the mode, rapid dismounting and mounting between the support and the mounting equipment can be achieved, and the purposes of facilitating operation and improving efficiency are achieved.