60results 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

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 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 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 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 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.

The utility model provides a circle mapper for circle cutting, 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, the circle center positioning component can translate along the track of the sliding chute or is in positioning connection with the sliding chute, one end of the body is provided with a paper cutting component, and the other end of the body is connected with the paper cutting component. The paper cutting assembly comprises a blade capable of stretching out or retracting back. When the circle center positioning assembly is connected with the sliding groove in a positioning mode, the body can rotate around the central axis of the circle center positioning assembly. Extension or retraction of the blade is controlled through movement of the hand pushing block, the circle center positioning assembly on the body is matched, the circle cutting stability and precision can be improved, and operation is easy.

The utility model relates to the technical field of compasses, in particular to mathematics compasses with a telescopic mechanism, which comprise a mounting frame, and a supporting rod is movably arranged on the left side of the inner wall of the mounting frame through a clamping shaft. By means of the telescopic mechanism formed by the auxiliary rod below the compasses and the telescopic rod inside the compasses, a user can conveniently adjust the length of the auxiliary rod, and in the using process of the compasses, the supporting effect can be achieved under the action of the angle rod and the foot pad installed at the bottom of the supporting rod below the compasses; the pen holder can be mounted through a mounting pipe mounted at the bottom of a telescopic rod through a connecting rod, the pen holder can be fixed through a fixing screw handle on the right side, adjusting rotating handles on the two sides of an adjusting groove are arranged, and threads are mounted at the two ends of a rotating shaft, so that the rotating shaft can move forwards; and the gasket installed on one side is tightly attached to one side of the connecting rod, so that the effect of fixing the angle of the connecting rod is achieved.

The utility model provides a multifunctional demonstration pointer, which comprises a rod body and a handle body, the first end of the rod body is provided with an indicating block, the rod body is provided with a plurality of installation parts for installing writing pens along the length extension direction, and the middle section of the rod body is provided with a support body. The first end of the supporting body is rotatably provided with a rotary supporting part protruding out of the outer surface of the rod body, and the second end of the supporting body penetrates through the rod body and then is detachably connected with the handle body. When the writing board is used, the writing pen is installed on the rod body through the installation part, the writing pen and the supporting part are distributed on the same side, then the handle body is held by one hand, the supporting part and the writing pen are supported on the surface of the writing board at the same time, then the rod body is poked by the other hand, and the writing pen is driven to do circular motion with the supporting part as the circle center. And drawing of an arc or a circle can be completed. Therefore, the use function of the pointer is expanded.

The utility model relates to a drawing assistive device for mathematics major learning, which relates to the technical field of mathematics learning tools, and comprises a mathematics drawing assistive device assembly, the mathematics drawing assistive device assembly comprises a ruler and a plurality of geometric figure holes with different shapes, the geometric figure holes are arranged on the surface of the ruler, and scale marks are arranged on the surface of one end of the ruler. An adjustable circle center part is slidably connected to the center of the end, back on to the scale marks, of the ruler, an adjustable radius part is slidably connected to the position, located at the end of the ruler, of one side of the adjustable circle center part, and each of the adjustable radius part and the adjustable circle center part comprises an L sliding block seat slidably connected to the end of the ruler. The adjustable radius component further comprises a detachable pen sleeve which is detachably installed on an L-shaped sliding block base of the adjustable radius component, a pen needed for drawing is inserted into the detachable pen sleeve, multiple drawing functions are integrated in one device, the time for replacing different tools is shortened, and the working efficiency is improved.

The application discloses a compass, which comprises a compass base, a first supporting leg and a second supporting leg, the head of the first supporting leg and the head of the second supporting leg are rotationally connected to form a joint end, the joint end is rotationally installed in the compass base, a locking rod is installed on the first supporting leg, the locking rod is provided with a pressing part which is movably connected with the joint end, when the locking rod is in a locking position, the pressing part abuts against the joint end to rotationally lock the head of the first supporting leg and the head of the second supporting leg, when the locking rod is forced to move to an unlocking position, the locking rod drives the pressing part to move to reduce the acting force on the joint end, so that the head of the first supporting leg and the head of the second supporting leg are rotationally unlocked, a user only needs to exert a certain force on the locking rod, and then the unlocking operation can be quickly completed, without the need of complicated adjusting steps, additional parts are reduced, and the structure of the whole compass is more compact.

The utility model discloses an electronic compass which comprises an operation handle, a main body, a pin foot and a line pen foot. The main body comprises a shell, a display screen, a sensor and a controller; a shaft pin is arranged on the shell; the pin comprises a first foot part and a first coupling part; a needle part is mounted at the front end of the first foot part, a first coupling hole is formed in the first coupling part, and a gear is arranged at the tail end of the first coupling part; the line pen foot comprises a second foot part and a second coupling part, a line drawing pen is installed at the front end of the second foot part, a second coupling hole is formed in the second coupling part, and an arc-shaped tooth part is arranged at the tail of the second coupling part; the shaft pin penetrates through the first coupling hole and the second coupling hole, and the gear is meshed with the arc-shaped tooth part. The positioning support is installed in the shell, the positioning support enables the center line between the two compass feet to be basically consistent with the operating handle, it is guaranteed that the operating handle of the electronic compass is perpendicular to a target face through the positioning support, and therefore a stable structural foundation is provided for high-precision drawing.

This utility model relates to the field of compasses and provides a compass with a pointer dial. It includes a compass head, pins and lead feet rotatably mounted on the compass head, connected by a transmission mechanism that allows the pins and lead feet to open and close opposite to each other. Each pin or lead foot has a connecting portion with a first tooth. The compass head has a first rotating shaft with a second tooth, which meshes with each other. The compass head also has a pointer dial with graduations and a first notch. A pointer slide is mounted on the first rotating shaft, with its tip extending through the first notch to the outer surface of the pointer dial. The tip of the pointer slide points to the graduation value of the compass opening. The compass can read the graduations through the pointer dial and pointer slide without the need for a ruler, improving the efficiency of drawing circles and solving the technical problem of low efficiency in drawing circles with a compass.

A pair of compasses with a protective sleeve comprises a compasses head, a positioning foot, a rotating foot and the protective sleeve, the positioning foot and the rotating foot are connected to the compasses head, a spine part is arranged at the bottom of the positioning foot, and the protective sleeve can slide up and down in the axial direction of the positioning foot and has a storage state and a use state. During storage, the protective sleeve covers the spine part; and during use, the protective sleeve slides upwards to expose the spine part. A reset mechanism and a locking mechanism are arranged between the protective sleeve and the positioning pin, the reset mechanism ensures that the protective sleeve tends to be in a storage state, and the locking mechanism can lock the protective sleeve in a use state. Due to the fact that state switching of the protective sleeve is achieved in an up-down sliding mode, rapid switching can be achieved without occupying too much space, efficient switching between a storage state and a use state is achieved by arranging a reset mechanism and a locking mechanism and utilizing cooperation of the reset mechanism and the locking mechanism, and the use safety of the protective sleeve is improved. The whole switching process is simple and convenient, and can be quickly realized by a single hand.

The application discloses a pen type compass, which comprises a compass seat, a pen barrel and a positioning rod, the pen barrel is provided with an engaging part matched with the positioning rod, the pen barrel comprises a connecting rod and a pen barrel, the pen barrel is slidably connected with the connecting rod to realize telescopic extension, when the pen barrel is slidably extended relative to the connecting rod, the engaging part is extended to be matched with the positioning rod, the positioning rod is connected with the engaging part through rotation to realize writing function, a lock catch is arranged between the connecting rod and the pen barrel, when the positioning rod is rotated to be separated from the engaging part, the pen barrel can be slidably retracted relative to the connecting rod and locked through the lock catch to realize compass function, the user can realize switching between the writing function and the compass function through simple sliding and rotating operation, the lock catch is additionally arranged to ensure the stability of the pen barrel when the compass function is used, and the use stability of the overall structure is improved.

The utility model relates to the technical field of mathematical drawing, and discloses a mathematical drawing device which comprises a disc, a wafer and a main plate, the wafer is arranged at the circle center position in the middle of the disc, the main plate is connected to the side edge of the wafer, the side edge of the wafer is further connected with two auxiliary plates, and the tail ends of the main plate and the auxiliary plates are slidably arranged in a sliding groove formed in an inner ring of the disc in an abutting mode. A plate groove is formed in the main plate, a movable plate is slidably arranged in the plate groove, a second through hole is formed in the middle of the surface of the movable plate, and a penetrating opening which is communicated with the plate groove and vertically penetrates through the plate groove is formed in the surface of the main plate in the direction of the plate groove. According to the technical scheme, the pen point penetrates through the second penetrating hole in the surface of the position-adjustable moving plate, a circle or an arc with the corresponding radius is drawn, the scale marks arranged on the surface of the disc facilitate direct drawing of the arc with the corresponding angle, and therefore the purpose of drawing an arc with the specified radius and angle is achieved without the help of a ruler and a protractor. And no pinhole is left, so that continuous drawing with the circle center as the starting point is facilitated.

The utility model discloses a multifunctional ruler for mathematics teaching, which relates to the technical field of rulers and comprises a protractor composed of a protractor body and a hollow groove, a circular rotating groove penetrating through the straight end face of the protractor body is arranged on the inner side of the hollow groove, and a connecting ring block is fixed at the central position of the protractor body. The protractor body is connected with an angle drawing assembly through the circular rotating groove and the connecting ring block, and the angle drawing assembly is used for achieving angle line drawing operation. The angle drawing assembly comprises a knob, a convex connecting column and a rotating arm; a circle drawing assembly is further arranged on the rotating arm and used for achieving circle drawing operation. By arranging the angle drawing assembly and the circle drawing assembly, the angle of the protractor can be drawn more conveniently, meanwhile, the circle drawing function is added, the functions of the protractor are richer, and a good auxiliary effect is achieved for drawing operation in mathematics teaching.

The utility model discloses a multifunctional copying gauge, which comprises a first supporting arm, a second supporting arm, a first locking device, a base and a line drawing pen. The multifunctional copying gauge has a copying use state and a compass use state. In the copying use state, the supporting center is abutted on a surface to be shaped, and the nib of the line drawing pen passes through the avoiding hole. At this time, the supporting center moves along the surface of the surface to be shaped, and the nib of the line drawing pen can draw the contour shape of the surface to be shaped synchronously. The angle of the line drawing pen can be adjusted to switch to the compass use state. In this state, the supporting center is abutted on a plane to be drawn, and the nib of the line drawing pen can draw a circular track on the plane to be drawn with the supporting center as the center. The multifunctional copying gauge integrates the functions of the copying gauge and the compass into one device, which greatly improves the work convenience and efficiency of the construction personnel.

The multifunctional compasses with the double-end pen tool comprise a compasses connecting base, a first compasses supporting leg and a second compasses supporting leg, and a positioning needle assembly is arranged at the end, away from the compasses connecting base, of the first compasses supporting leg; the second compass supporting leg comprises a connecting pen sleeve and a double-end pen tool detachably connected with the connecting pen sleeve in an inserted mode, the end, away from the double-end pen tool, of the connecting pen sleeve is rotationally connected with the compass connecting base, one end of the double-end pen tool is a pen or a tool piece, and the other end of the double-end pen tool is also a pen or a tool piece. The tool piece is any one of a pencil lead-shaped tool, a screwdriver, a cutting knife, a needle-shaped tool or a lamp assembly. The multifunctional compasses not only achieve the functions of compasses, but also achieve the functions of a double-end pen, a one-end pen, a one-end tool and a double-end tool, meanwhile, due to expansion of tool pieces, the multifunctional compasses further have the functions of a cutting knife, a screwdriver, a needle-shaped tool or a lamp, and the multifunctional compasses achieve multiple functions and are convenient to store and carry about for use.