128results about "Circular curve drawing instruments" patented technology

The utility model discloses a primary school protective compass, which relates to the technical field of learning tools and comprises a fixing frame, a supporting plate and a connecting plate are rotatably connected to the surface of a fixing shaft at the bottom end of the fixing frame, a positioning sharp block is fixedly connected to the bottom of the supporting plate, a universal ball seat is arranged at the bottom end of the positioning sharp block, and a universal ball is rotatably connected to the inner wall of the universal ball seat. The bottom end of the positioning sharp block penetrates through and is fixedly connected to the center of the universal ball, clamping columns are fixedly connected to the two sides of the universal ball seat, a fixing shell is arranged at the bottom of the supporting plate, the side faces of the universal ball seat and the clamping columns are movably inserted into the top of the inner wall of the fixing shell, and a fixing ring is fixedly connected to the side face, away from the supporting plate, of the connecting plate. The drawing pen solves the problems that when the needle point of the circle center is increased along with the angle of the drawing pen, the supporting force of the inclined needle point is weakened, in order to guarantee the completeness of a drawn circle, the drawing pen can draw the circle only by increasing the pressing force, and at the moment, the needle point easily penetrates through the paper surface, so that the completeness of the paper surface is damaged.

The invention relates to the use of a marking instrument (10; 10a), such as a ruler, set square, or protractor, to refine hand movements and increase the confidence and comfort of individuals who have difficulty automating hand gestures in time and space. The instrument comprises a main body (12) with one or more lateral marking elements (22), with one or more sliding systems (14, 15) and one or more gripping systems (16), and is constructed in several blocks. The main body (12) associated with the gripping system(s) (16) and the lateral marking elements (22) associated with the sliding system(s) (14, 15) are separate blocks, and the main body is actuated by pressure to perform a gripping action. Figure for the abstract: Fig. 14

The utility model provides a wedge type positioning compass which comprises a connector, a positioning compass foot and a rotating compass foot, the top of the positioning compass foot and the top of the rotating compass foot are located in the hinge groove, the positioning compass foot and the rotating compass foot are mutually hinged through the connector, and a synchronous positioning piece is arranged on the hinge face between the positioning compass foot and the rotating compass foot. Wedge-shaped surfaces are arranged at the tops of the positioning gauge leg and the rotating gauge leg, the wedge-shaped surfaces are conical surfaces, and the rotation axis of the generatrix of each wedge-shaped surface is coaxial with the hinge axis of the positioning gauge leg and the rotating gauge leg; a wedge-shaped block matched with the wedge-shaped face is arranged at the bottom of the hinge groove, and a packing knob used for pushing the wedge-shaped block to extrude the wedge-shaped face is arranged on the top of the connector. The utility model has the advantage that the included angle between the positioning compass leg and the rotating compass leg can be fixed.

To provide a measure compass which overcomes various inconveniences of conventional educational compasses, including poor usability and the danger of having a needle attached, by using only a ruler to draw lines, so that even elementary school students can easily and even safely draw neat round circles with this measure, without the need for a conventional compass.SOLUTION: The plate spring (spring) and measure (tape measure) can be used to draw circles.EFFECT: The measure compass fits easily into a pencil case, does not require a case, and does not take up much space. It is also convenient for carrying a measure, making it a revolutionary measure compass added to Japan's world-renowned stationery. It can draw large, round circles and neat circles. It is a small, compact, and cute measure for learning purposes for elementary school students, and for professional use, it can draw large, round circles of 1 to 2 meters or more. It is the world's first revolutionary measure compass which can measure length and draw circles.SELECTED DRAWING: Figure 1

The utility model provides a circle mapper capable of replacing circle cutting and circle drawing, which comprises a body, a sliding chute is arranged in the middle of the body, a circle center positioning component is arranged in the sliding chute, and the circle center positioning component can translate along the track of the sliding chute or is in positioning connection with the sliding chute; a paper cutting assembly is detachably mounted at one end of the body; or one end of the body is detachably provided with a drawing assembly; or one end of the body is detachably provided with the paper cutting assembly, and the other end of the body is detachably provided with the drawing assembly. The paper cutting assembly and / or the drawing assembly are / is installed on the plastic cover, the plastic cover is detachably connected with the body, switching between the circle cutting function and the circle drawing function is achieved, circle cutting and circle drawing are achieved on one product in cooperation with the circle center positioning assembly on the body, the applicability of the product can be improved, installation is convenient, and operation is easy.

The utility model discloses a multifunctional geometric drawing ruler which comprises a ruler body, and the ruler body is provided with a first circle drawing mechanism, a second circle drawing mechanism, a stereogram drawing mechanism, an angle measuring mechanism and a plurality of graph hollow-out areas. According to the multifunctional ruler, the first circle drawing mechanism, the second circle drawing mechanism, the stereogram drawing mechanism, the angle measuring mechanism and the graph hollowed-out areas in various shapes are arranged on the ruler body, so that straight lines and curves can be drawn, various angles can be read and drawn, and various sectors, arcs, polygons and stereoscopic graphs can be drawn; the circle drawing device further comprises another circle drawing mechanism with a pressing type circle center positioning button as a core, the sharp bottom of the pressing type circle center positioning button can be positioned on paper so as to play a role of a circle center, then a limiting block is adjusted to a proper position, a fastening bolt is screwed to fix the limiting block, and the circle drawing mechanism is used for drawing circles or concentric circles with different sizes. Therefore, radius adjustment is completed, and a larger circle can be drawn by rotating the ruler body with the pressing type circle center positioning button as the circle center.

The application discloses a drawing measuring device with an angle measuring structure and belongs to the technical field of drawing measuring tools, mainly comprising a fixed ruler plate, one fixed page plate is hingedly connected to each end of the inner side of the fixed ruler plate, a first folding ruler plate is fixed to the end of the fixed page plate away from the fixed ruler plate, a second folding ruler plate is fixed to the end of the fixed page plate away from the fixed ruler plate, and a fixed foot rod is clamped to the end of the first folding ruler plate away from the fixed ruler plate; the first folding ruler plate, the fixed ruler plate, the second folding ruler plate, the second bevel gear, the first bevel gear, the screw rod, the screw rod matching cavity, the contraction supporting rod, the ruler cylinder, the angle indicating disc, the radian measuring ruler, the fixed foot rod and the drawing pencil are arranged, multi-functional integrated design is realized, straight line angle and radian measurement and drawing can be realized without frequent switching of tools, and the drawing efficiency is improved.

The utility model relates to the field of positioning tools, and discloses a combined angle square for positioning, which comprises a graduated scale, a right-angle ruler is arranged at the front part of the graduated scale, a gradienter is arranged at the right part of the right-angle ruler, a positioning rod is arranged at the right part of the right-angle ruler, and angle marking lines are arranged at the front part of the top surface of the graduated scale. Connecting grooves are formed in the upper portion and the lower portion of the graduated scale, a positioning groove is formed in the front portion of the connecting groove located at the top, a positioning opening is formed in the middle of the connecting groove, a plurality of line drawing openings are formed in the rear portion of the top face of the connecting groove, and an adjusting groove is formed in the middle of the left side of the right-angle ruler. According to the angle square, the graduated scale and the right-angle ruler are matched with each other, and the positioning groove, the angle marking line and the positioning assembly are matched with each other, so that the angle square can directly and clearly display the angle between the right-angle ruler and the graduated scale and limit the angle to a certain extent, and the angle square is more practical.

To finally devise a ruler which, after many attempts to improve upon the inconveniences, poor usability, and dangers of the needles attached to conventional educational compasses, allows anyone, even lower-grade students, to draw round circles easily, safely, and neatly without the need for a conventional compass, using only a line-drawing ruler which fits easily into a pencil case, has no case, and is compact enough to be carried inside a pencil case, and which is a revolutionary and ultimate planar scale compass added to the world-class stationery that Japan can be proud of, and by connecting the compasses together, enables drawing of large round circles.SOLUTION: Provided is a ruler compass that utilizes the bending and rounding portions of a leaf spring. The tip of the leaf spring is formed to be rounded so that the leaf spring can be inserted from below. The ruler has graduations of 0 to 15 cm or 20 cm, and 1 mm and 1 cm printed on one side.SELECTED DRAWING: None

The utility model discloses a compass pen which comprises a main body, a pen body and a compass foot, the pen body comprises a barrel-shaped shell, a refill outlet button movably arranged on the barrel-shaped shell and a pressing refill outlet assembly arranged in the barrel-shaped shell and connected with the refill outlet button, and a first connecting through hole is formed in the upper end of the barrel-shaped shell; a refill inlet through hole is formed in the main body, when the pen body and the compasses leg rotate relative to the main body until the compasses pen is in a folded state, the refill inlet through hole is communicated with the pressing refill outlet assembly through the first connecting through hole, and the refill inlet through hole, the first connecting through hole and the pressing refill outlet assembly are all located on the same straight line; therefore, the refill can be arranged in the refill pressing and discharging assembly through the refill inlet through hole and the first connecting through hole. Compared with a traditional compasses pen, after the refill in the pen body of the compasses pen is used, the pen body does not need to be detached, the refill can be arranged in the refill pressing and discharging assembly through the refill inlet through hole and the first connecting through hole, and the compasses pen is more convenient to use.

The utility model relates to the technical field of architectural design, and discloses a multifunctional drawing pen for architectural design, which comprises a drawing pen body serving as a connecting main body, the outer wall of the drawing pen body is fixedly connected with a fixing frame, the inner wall of the fixing frame is rotatably connected with a rotating plate, the rotating plate is connected with a moving block through a sliding assembly, and the moving block is connected with the connecting main body. Limiting plates are slidably connected to the inner walls of the moving blocks, inserting blocks are fixedly connected to the opposite ends of the limiting plates, pull rods are fixedly connected to the left ends of the limiting plates, and the outer walls of the limiting plates are slidably connected to the inner walls of the moving blocks. According to the circle drawing device, the guide cone is placed on paper by rotating the rotating plate, then the pull rod is pressed to drive the inserting block to be separated from the fixing hole, when the moving block reaches a proper position, the limiting plate is bounced by the first spring, and the limiting plate drives the inserting block to be inserted into the fixing hole to be fixed, so that circles can be drawn quickly, drawing time is shortened, and working efficiency is improved.

The utility model relates to the technical field of compasses, and discloses a novel dial type compass which comprises a watchcase and compass legs symmetrically and rotatably arranged in the watchcase, rack parts are arranged at the tops of the two compass legs, the two rack parts are meshed with each other to achieve synchronous reverse rotation of the two compass legs, a ring gear is rotatably connected in the watchcase, and the two rack parts are meshed with each other to achieve synchronous reverse rotation of the two compass legs. Wherein one rack part is provided with linkage teeth, the ring gear is meshed with the linkage teeth, a dial plate is fixedly connected to the watchcase, a pointer is rotatably connected to the interior of the dial plate, a center gear and a linkage gear are further rotatably connected to the interior of the watchcase, the center gear is meshed with the linkage gear, and the linkage gear is meshed with the center gear. The novel compass is simple in structure and convenient to disassemble and assemble, the unfolding angle of the compass foot can be effectively determined through the scales on the dial plate, the angle precision is high, and observation is convenient.

The invention relates to a circle drawing auxiliary device which comprises a base, a base rod with one end fixedly connected to the base, a center rod perpendicular to the base rod and with the middle end rotationally connected to the other end of the base rod, a driving assembly installed on the base rod and with the driving end in transmission connection to the upper end of the center rod, and at least one circle drawing mechanism. The circle drawing mechanism comprises a straight ruler plate parallel to the base rod, one end of the straight ruler plate is fixedly connected to the lower end of the center rod, the clamping cylinder is slidably connected to the straight ruler plate in the length direction of the straight ruler plate, the second limiting rod is connected to the straight ruler plate in a threaded mode, and the clamping cylinder is of a lower opening structure and used for allowing chalk to be inserted. The end of the second limiting rod abuts against the clamping cylinder. The problems that in the prior art, a circle drawing mode has limitation, a circle is difficult to draw at the high position of a blackboard, and circle drawing is possibly incomplete and has radius changes can be solved.

The utility model discloses an iron compass with a lead core insertion leg, and relates to the field of circular curve drawing. The compasses solve the problem that when a pen point of an existing compasses is used for drawing a circular curve, the pen point is gradually thickened, and the drawing precision is low. One end of a compasses supporting leg and one end of a connecting rod are hinged to a rotating shaft, a compasses point is rotationally connected with the other end of the compasses supporting leg so that a circular curve with the diameter smaller than 10 mm can be drawn, and a pencil lead inserting leg assembly is inserted into the other end of the connecting rod; the pencil lead inserting leg assembly comprises an inserting leg, a connecting sleeve and a pencil lead clamping piece, the upper end of the inserting leg is rotationally connected with the other end of the connecting rod, the pencil lead clamping piece is inserted into the lower portion of the inserting leg, the pencil lead is inserted into the pencil lead clamping piece, the connecting sleeve is screwed on the outer side of the lower portion of the inserting leg, and the clamping portion of the pencil lead clamping piece clamps the pencil lead in the screwing process of the connecting sleeve. The circular curve drawing device is used for drawing circular curves in the drawing process.

The circle drawing ruler comprises a body and a circular rotating disc, the body is provided with a first through hole matched with the circular rotating disc, and the circular rotating disc is provided with a second through hole allowing a pen point to be inserted therein. First annular protrusions and protruding blocks are arranged on the inner side wall of the first through hole in the thickness direction of the body at intervals, and annular sliding grooves are formed between the first annular protrusions and the protruding blocks. A second annular protrusion is arranged on the periphery of the circular rotating disc, when the circular rotating disc is arranged in the first through hole, the second annular protrusion is clamped into the annular sliding groove, and the second annular protrusion and the annular sliding groove are matched with each other, so that the circular rotating disc rotates relative to the body. When the circle drawing ruler is used, a user can insert the pen point into the second through hole, the second annular protrusion and the annular sliding groove are matched with each other, the circular rotating disc rotates relative to the body, at the moment, the pen point rotates along with the circular rotating disc, and therefore circle drawing is achieved.

An electric pencil sharpener with delay function includes a motor, a drive assembly, a gear assembly and a cutter assembly. The drive assembly includes a connecting rod, a drive shaft and a start trigger, a stop trigger, and a thrust plate. The connecting rod is moved backward to drive the start trigger to trigger the motor, and synchronously rotated with the cutter assembly; the stop trigger is provided with a teeth structure and a friction structure respectively. The thrust plate is rotated or moved to push against the drive shaft, so that the connecting rod continues to move backwards until the bulge portion engages with the teeth structure, and the ring portion matches with the friction structure, thereby actuating the stop trigger to move to trigger an action of the stop switch of the motor.

The utility model discloses a multifunctional teaching ruler for primary school teaching, and belongs to the technical field of teaching appliances, the teaching ruler comprises a mounting disc body, an adsorption disc, a through groove, sliding plates, a knob cap, a synchronous telescopic assembly and a limiting assembly, and the sliding plate on one side is pulled to drive a meshing gear to rotate through a meshing tooth groove in the sliding plate on one side. When the sliding plates contract, the sliding plates on the two sides can be adjusted to stretch out and draw back at the same time, the moving positions of the sliding plates can be limited through the limiting vertical plates, then the radius of a drawn circle can be adjusted, and drawing of the circle can be completed by rotating by 180 degrees. And a threaded rod rotates and moves inwards to make contact with the outer wall of one end of a meshing gear by rotating a turncap in a limiting assembly arranged in a rotating mode, then the meshing gear cannot rotate through friction force, and the positions of sliding plates on the two sides can be fixed.

The utility model discloses an iron compass capable of inserting a gel pen refill or a ball-point pen refill, and relates to the field of circular curve drawing. The compasses solve the problems that a curve is irregular and time and labor are wasted in the drawing process due to the fact that existing compasses cannot directly draw colored circles or arcs. An insertion leg (B) of a gel pen refill or a ball-point pen refill is detachably arranged on a right connecting rod (1); the gel pen refill or ball-point pen refill insertion leg (B) comprises an insertion pin (2) and a locking cap (3), the middle of the insertion pin (2) along the axis of the insertion pin (2) is hollow, the upper portion of the insertion pin (2) is inserted into the right connecting rod (1), a plurality of clamping jaws (4) are arranged on the lower portion of the insertion pin (2), a gel pen refill or ball-point pen refill is inserted into the insertion pin (2), and the locking cap (3) is arranged on the insertion pin (2) in a sleeved mode and clamps the clamping jaws (4) in a screwing mode. And the locking cap (3) clamps the clamping jaw (4) and clamps a gel pen refill or a ball-point pen refill at the same time. The circular curve drawing device is used for drawing circular curves.

The utility model relates to the technical field of compasses, in particular to a pair of compasses capable of automatically storing a central needle, which comprises a fixed foot and a rotating foot, the top ends of the fixed foot and the rotating foot are rotatably connected, the bottom end of the fixed foot is provided with an inner groove, and a needle head assembly is mounted in the inner groove and comprises a pressing rod. A retreating groove is formed in one side of the middle of the pressing rod, an elastic clamping rod is installed at the retreating groove, a lower clamping opening is formed in the lower portion of one side of the inner groove and matched with the elastic clamping rod in a clamped mode, a fixing piece is installed at the position, close to the elastic clamping rod, of the rotating foot, and a driving column is slidably arranged in the middle of the fixing piece. According to the compasses capable of automatically storing the center needle, through ingenious mechanical design, the automatic storage function of the center needle is achieved. After the compasses are used, the needle head assembly can be automatically driven to retract only by simply closing the fixed foot and the rotating foot, manual operation is not needed, and the storage process is greatly simplified.

The utility model discloses a multifunctional protractor, which relates to the technical field of protractors, and comprises a semicircular frame, a sliding rod and a ruler plate integrally injection-molded with the semicircular frame, a sliding groove is arranged on the front side of the ruler plate, a sliding positioning block is arranged in the sliding groove, the sliding positioning block is in sliding connection with the inner wall of the sliding groove, and the sliding rod is arranged in the sliding groove. A locking nut is connected to the threaded protrusion of the sliding positioning block in a threaded mode, and a circle drawing through hole is formed in the front face of the sliding positioning block. According to the circle drawing ruler, the sliding positioning block is designed in the sliding groove, the locking nut is connected to the sliding positioning block in a screwed mode, the position, located in the sliding groove, of the sliding positioning block can be limited, and the radius of a circle can be accurately determined when the circle drawing operation is conducted through the cooperation of the positioning mark groove and the third scale marks; furthermore, the phenomenon that the drawn straight line has flaws due to obstruction during straight line drawing operation is avoided, and the practicability is improved.

The utility model discloses a multifunctional junior high school geometry tool, and relates to the technical field of drawing tools. The device comprises a square plate, an inscribed circle is formed in the square plate, a circular plate is fixedly arranged in the inscribed circle, a special-shaped groove is formed in the circular plate, a first triangular block and a second triangular block are fixedly arranged in the special-shaped groove, and one side of the first triangular block is fixedly connected with one side of the second triangular block; a plurality of first holes are formed in the circular plate; through cooperation of the square plate and the ruler, a rectangular coordinate system can be accurately drawn, two geometric circles with different diameters are drawn through the inscribed circle and the circular plate, and an equilateral triangle and a special isosceles triangle are respectively drawn through the first triangular block and the second triangular block, so that the convenience of geometric figure drawing is improved; the convenience of mathematics teaching is improved; by arranging the magnet block, the geometric tool can be attracted and fixed to the blackboard through the magnet block, and operation is convenient and fast in the geometric figure drawing process.

To provide a revolutionary sheet steel compass which is yet another addition to the world-renowned stationery that Japan can be proud of, which fits easily into a pencil case, does not require a case, and is compact enough to fit inside a pencil case or wrap around the user's wrist for easy portability, and by connecting the compasses together, the user can draw large, perfect circles, and simply glue them together and trace the inside of the compass with a pencil to draw perfect circles, the compass having been achieved after countless attempts to improve upon the inconveniences, poor usability, and dangers of the needles attached to traditional educational compasses, then making a ruler that allows anyone, even elementary school students, to draw perfect circles safely and easily, without the need for a traditional compass.