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186results about "Writing aids" patented technology

Dimming glass defect detection and repair system based on AI vision

The invention belongs to the technical field of switchable glass production, and discloses a switchable glass defect detection and repair system based on AI vision. Comprising a hyperspectral camera, the hyperspectral camera is mounted on a mounting rack, and the mounting rack is fixedly connected to a bottom plate. By arranging the marking assembly, when a certain notch is marked, a first motor is started to drive a vertical cylinder and a marking pen to turn to the lower portion, electromagnets with the corresponding number are powered on, the electromagnets are powered on to generate magnetic force, the electromagnets can move in the direction of an iron block, the electromagnets drive jacking columns to move, and the jacking columns press jacking blocks to move through arc-shaped blocks; the ejection blocks are ejected out of the shell, the second motor is started to drive the first annular gear to rotate, the first annular gear drives the marking pen to rotate through the rotating plate, on the rotating track of the marking pen, the corresponding number of ejection blocks are in the ejection state, the track of the marking pen can be changed, different defects are marked, and only the different numbers of ejection blocks need to be ejected out. Therefore, the defects can be distinguished and marked.
Owner:HUNAN ZHUCHENG DEXIN ENG CO LTD

Automatic defect detection device for film production line

The invention relates to the technical field of film detection, in particular to an automatic defect detection device for a film production line, which comprises a detection frame, a visual detection mechanism for detecting film defects is arranged on the detection frame, two sides of the detection frame are respectively provided with a pair of tensioning conveying frames, and the inner side of the detection frame is fixedly connected with a fixing frame. Through the arrangement of the chain, the following mechanism, the moving mechanism and other structures, when the visual detection mechanism finds that defects exist on the film, the marking pen can be driven to move to the position above the film, meanwhile, the main inserting rod is inserted into the chain, and due to the fact that the chain is driven by the conveying rollers, the marking pen can be driven to move to the position above the film; and the conveying roller is mainly used for controlling the conveying speed of the film, so that the conveying speed of the chain is the same as that of the film, the sliding frame and the marking pen can move along with the film, finally the marking pen is driven to draw a circle of marks on the film, and accurate marking of defects of the film is achieved.
Owner:SICHUAN YIHAN NEW MATERIAL TECH CO LTD

Laser scanning type cigarette case paperboard blank accurate defect detection equipment

The invention relates to the technical field of cigarette case paperboard appearance detection, in particular to laser scanning type cigarette case paperboard blank accurate defect detection equipment which comprises a central control machine base, a controller unit is arranged on the side portion of the central control machine base, the controller unit of the central control machine base is connected with electric power components through wires, and a bearing plate is fixed to the central area of the upper portion of the central control machine base. The conveying roller sets are symmetrically installed at the input end and the output end of the center control machine base. Through cooperative configuration of a laser detector array and a thickness detection mechanism, surface microdefects and thickness abnormity are synchronously detected, the problem that traditional step-by-step detection is low in efficiency is solved, and speed measurement is improved; an elastic positioning system is formed by the moving frame and the first spring and is matched with differential operation of the conveying roller set, self-adaptive clamping of the surface of the blank is achieved, constant clamping force is kept, and the defect of creases caused by rigid clamping is avoided; the telescopic rod of the first electric push rod drives the first marking pen to move vertically, and the positioning precision can be improved by combining real-time data of a dynamic feedback sensor of the thickness detection mechanism.
Owner:SHENZHEN JUJIN PAPER PACKAGING CO LTD

Project cost surveying and mapping ruler

ActiveCN223192239UCompasses with pivoted armsWriting aidsMarking outStructural engineering
The utility model discloses a surveying and mapping ruler for engineering cost, which comprises a first ruler section, the first ruler section is provided with a mounting groove, a second ruler section is arranged in the mounting groove in a sliding and telescopic manner, the first ruler section and the second ruler section are both provided with marking ends, the outer end parts of the two groups of marking ends are flush, and the inner sides of the marking ends are both provided with fluorescent grooves. A pen compass frame is rotatably installed on the back face of the first ruler section, a clamping frame is arranged at the bottom end of the pen compass frame, a steel needle is arranged at the tail end, away from the second ruler section, of the first ruler section, an installation base is slidably and adjustably installed on the second ruler section, a dial is arranged on the installation base, and an angle ruler is rotatably installed between the dial and the installation base. According to the multifunctional drawing ruler, the accuracy and the stability in the whole surveying and mapping process and the drawing process can be improved, angle measurement, drawing and annular drawing can be flexibly carried out, and the multifunctional drawing ruler is complete in function.
Owner:HEILONGJIANG YISHUN ENGINEERING COST CONSULTING CO LTD

Pipe system on-site lofting drawing ruler

The invention relates to the technical field of ship measurement tools, in particular to a pipe system on-site lofting drawing ruler which comprises a measurement operation part, a measurement supporting part and a measurement limiting part, the measurement supporting part is movably connected with the measurement limiting part, and a work preparation cavity used for containing the measurement operation part is formed in one side of the measurement limiting part. The measurement limiting piece is movably connected in the work preparation cavity and comprises a main measurement work block, a first measurement auxiliary block, a second measurement auxiliary block and a third measurement auxiliary block; the first measurement auxiliary block, the second measurement auxiliary block and the third measurement auxiliary block are arranged at intervals and are all attached to the outer edge of the main measurement working block, and the main measurement working block, the first measurement auxiliary block, the second measurement auxiliary block and the third measurement auxiliary block work independently. The problem that in the prior art, the actual installation error is large due to bare-handed drawing is solved.
Owner:CHENGXI SHIPYARD

A page-turning multifunctional writing machine

The application discloses a page-turning multifunctional writing machine, which comprises an operation support, a writing assembly, a page suction mechanism and a page turning mechanism. The writing assembly comprises a distance adjusting assembly, an angle adjusting assembly installed on the distance adjusting assembly and a writing pen installed on the angle adjusting assembly. The page suction mechanism is installed on the operation support and used for sucking paper. The page turning mechanism comprises three groups of driving mechanisms installed on the operation support and used for driving page turning rods to horizontally move and vertically lift. Two support plates with clamping gaps in the middle are arranged below the page turning rods, and a book clamping mechanism is arranged between the clamping gaps. Through cooperation of the operation support, the writing assembly, the page suction mechanism, the page turning mechanism and a color drawing mechanism, the writing machine can automatically turn pages and replace cores during use, so that the writing precision and stability of the writing machine are improved, and writing is more smooth and natural.
Owner:ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE

Plane design drawing device

The utility model relates to a graphic design drawing device which comprises a first pressing plate and a second pressing plate which are both of an L-shaped structure, and the first pressing plate and the second pressing plate are connected to form a rectangular frame structure used for pressing the edge of drawing paper. The second pressing plate comprises a first straight plate and a second straight plate. According to the technical scheme, the first pressing roller, the second pressing roller and the first pressing plate press the four edges of the drawing paper correspondingly, the four edges of the drawing paper are fixed at a time, the first pressing roller and the second pressing roller are shifted, so that the bottom of the first pressing roller or the bottom of the second pressing roller rotates from one side in the rectangular frame to one side outwards, and the drawing paper is fixed. The two adjacent side edges of the drawing paper can be extruded and pushed outwards, the part, located in the rectangular frame, of the drawing paper is pulled to keep the drawing paper flat, after the drawing paper is pulled and fixed, the first pressing roller and the second pressing roller are kept in a relatively fixed state under the gravity effect of the rectangular frame, and the drawing paper can be kept in a tensioned state to a certain degree.
Owner:DEYANG GENERAL ELECTRONIC TECHNOLOGY SCHOOL

Angle-adjustable English writing corrector

The utility model discloses an English writing corrector with an adjustable angle, which relates to the technical field of writing correctors and comprises a straight rule body, a vernier component and a wavy sub-rule, the straight rule body is slidably connected with the vernier component, a groove is arranged on the straight rule body, the wavy sub-rule is detachably connected with the groove, and the straight rule body is provided with a groove. The vernier assembly comprises a sliding head base, a rotating sliding head and a locking screw, and the rotating sliding head is rotationally connected with the sliding head base through the locking screw. When the straight rule is used, the vernier assembly slides on the straight rule body, a user can conveniently and rapidly draw a plurality of basically equidistant lines on blank paper, the slotted hole in the rotating sliding head can help a learner to rapidly draw four-line three-grids of different styles, grid drawing efficiency is effectively improved, and practicability is good. Meanwhile, the design of the child-mother ruler jigsaw puzzle increases practicability, the small ruler can have the function of drawing straight lines and wave lines at the same time, direct writing can be conducted in the ruler through the groove, and the bad writing habit is corrected.
Owner:汪新颖

Information processing device, processing device system, information display method, and information display program

To provide an information processing device, a processing device system, an information display method, and an information display program that allow a user to easily recognize processing tools mounted on a processing device or processing operations performed by the processing tools.SOLUTION: In a processing device system 10 including a mobile terminal device 14 and a personal computer 16, which are information processing devices, the mobile terminal device 14 displays information about a cutting plotter 12 capable of mounting multiple tools on a head 26 for processing a workpiece 22 on a touch panel display 30. The touch panel display 30 displays tool icons indicating tools in use mounted on the cutting plotter 12 and tool icons indicating tools not in use mounted on the cutting plotter 12, in different forms, and displays cut conditions indicating the settings of the processing operations of the tools in use with respect to the workpiece 22.SELECTED DRAWING: Figure 1
Owner:MIMAKI ENGINEERING CO LTD

Phasor diagram scale and drawing method

The invention relates to the field of phasor diagram drawing, in particular to a phasor diagram scaleplate and a drawing method.The phasor diagram scaleplate comprises a plate body, and the plate body comprises a line drawing part with linearly distributed scales and a marking part with 0-360-degree scale full-circle protractor; the marking part comprises a circle center position; the A-phase voltage marking area, the B-phase voltage marking area and the C-phase voltage marking area which are spaced by 120 degrees are respectively extended outwards by taking the circle center position as a starting point, and the phasor diagram ruler is arranged, so that the problem that a worker does not draw a phasor diagram in a standard and inconvenient manner is solved, and the problem that the worker does not have paper in field drawing is also considered; the tool can be used for paperless drawing and marking.
Owner:GUIZHOU POWER GRID CO LTD

Positioning device for laser drawing

The utility model discloses a positioning device for laser drawing, which comprises a laser positioning component, a laser drawing component and a laser drawing component. The limiting assembly comprises a fixing frame, a push rod, a limiting frame and an inserting hole; the fixing frame is fixed to the upper middle portion of the opposite end of the connecting frame, the push rod penetrates through and is slidably connected to the middle of the outer side end of the fixing frame, the limiting frame is fixed to the inner side end of the push rod, one side of the limiting frame penetrates to the opposite end of the connecting frame, and the inserting hole is formed in the penetrating position of the limiting frame and the connecting frame. Through the arrangement of the limiting assembly, after the pressing plate moves upwards, the push rod is pushed, so that the push rod pushes the opposite end of the limiting frame to move out of the insertion hole, the opposite end of the limiting frame is promoted to move below the pressing plate, the limiting frame is promoted to limit the upwards-moved pressing plate, and therefore a worker can conveniently rotate the threaded rod subsequently; the threaded rod drives the connecting nut, the connecting frame and the pressing plate to move oppositely or oppositely, the process can be operated by one person, cooperative work of two persons is not needed, and manpower waste is reduced.
Owner:KUNSHAN WULITECH ELECTRONICS CO LTD

Drawing device

PendingJP2026079233AWriting aids
The object of the present invention is to provide a drawing device that can accurately draw on a drawing surface based on pre-set drawing information. [Solution] The drawing device 100 is moved by a movable device 104 that can move in all directions and is controlled by a movement control device 112, based on drawing information II which records X and Y coordinates that have been set in advance in a time series. A movement sensor 108 attached to the drawing device 100 acquires actual movement coordinate information RMI. The movement control device 112 calculates the movement direction MD and movement amount MA based on the actual movement coordinate information RMI and the drawing information II, drives the movable device 104 to move to predetermined coordinates. The drawing device 100 is provided with a writing device 106, which draws on the drawing surface 122.
Owner:TAMADIC CO LTD

Digital creative drawing machine

The embodiment of the invention provides a digital creative drawing machine. The digital creative drawing machine comprises a machine shell, a driving component, a fixing component, a first positioning mechanism, a control unit and a guiding mechanism. The driving part, the fixing part, the first positioning mechanism and the guiding mechanism are arranged on the machine shell, and the moving direction of the paper is perpendicular to the moving direction of the pen refill on the fixing part driven by the driving part. The fixing component is driven by the driving component to move in the length direction of the machine shell, the first positioning mechanism and the guiding mechanism are correspondingly arranged in the vertical direction, paper is guided to be conveyed in the direction perpendicular to the moving direction of the refill, and it is guaranteed that movement of the refill and movement of the paper on the two-dimensional plane do not interfere with each other. The orthogonal motion design obviously improves the accuracy of the drawing path, and is suitable for automatic drawing of complex patterns.
Owner:SHENZHEN YUANHU TECH CO LTD

Space rectangular coordinate system drawing ruler for mathematics

ActiveCN224013287UWriting aidsEducational modelsRotation (mathematics)Mathematical notion
The utility model provides a space rectangular coordinate system drawing ruler for mathematics, and relates to the field of teaching aids, the space rectangular coordinate system drawing ruler for mathematics comprises a Z rod and a Y rod, the end points of the Z rod and the Y rod are mutually fixed and arranged at 90 degrees, the fixed point of the Z rod and the Y rod is rotatably connected with an X rod, and the plane formed by the rotation track of the X rod coincides with the symmetry plane of the Z rod and the Y rod. The three coplanar rods are arranged to assist in drawing a two-dimensional rectangular coordinate system on a plane blackboard or a drawing position, meanwhile, one straight rod is rotated to enable the three rods to form three shafts simulating the rectangular coordinate system, switching between a drawing ruler and a display teaching aid is completed in a simple rotation mode, and the teaching efficiency is improved. Students are helped to understand the essence of mathematical concepts such as vectors in a coordinate system through a visual display teaching aid.
Owner:刘秋龙

Protractor convenient to read

The utility model discloses a protractor convenient to read, which comprises a protractor plate, a central shaft barrel is fixedly arranged in the middle of a transverse plate of the protractor plate, and the middle of the central shaft barrel is hollow. According to the protractor convenient to read, the angle measuring swing sleeve plate is arranged, the angle measuring swing sleeve plate swings by taking the central shaft barrel as a central angle, and the measuring swing needle in the angle measuring swing sleeve plate is aligned to and covers an angle line needing to be measured, so that direct reading can be performed through the reading pointed by the measuring swing needle; the extension ruler sleeve plate is arranged at the other end of the angle measuring swing sleeve plate, and the extension ruler sleeve plate and the extension butt joint ruler plate are spliced for use, so that required line segments are drawn on the right side edges of the extension ruler sleeve plate and the extension butt joint ruler plate by measuring the reading angle of the swing needle; therefore, required angle lines can be drawn quickly and conveniently, and the practicability and accuracy of the protractor are effectively improved.
Owner:WANAN COUNTY VOCATIONAL SECONDARY VOCATIONAL SCHOOL (WANAN ELECTRONIC CIRCUIT BOARD TECHNICAL SCHOOL WANAN COUNTY VOCATIONAL & TECHNICAL SCHOOL)

Multifunctional drawing board for architectural design

The utility model discloses a multifunctional drawing board for architectural design, and relates to the technical field of drawing boards, the multifunctional drawing board for architectural design comprises a support frame, the top of the support frame is fixedly provided with a drawing board, and the position of the support frame close to the drawing board is provided with a fastening bolt. A fastening bolt on the supporting frame is in extrusion connection with one side of the drawing board, a sliding groove is formed in the drawing board, a roller is slidably connected into the sliding groove, and a transmission shaft is fixedly connected to one side of the roller. According to the multifunctional drawing board for building design, the transmission shaft and the rolling wheel slide in the sliding groove, then the line drawing rod can be driven to vertically move in the drawing board, vertical line drawing can be conducted on a drawing paper, and therefore a stable and flat drawing surface is provided for the drawing paper during drawing; according to the drawing device, paper shaking or wrinkling can be effectively avoided, each line can be accurately drawn conveniently, the accuracy of a design drawing is ensured, and the construction problem caused by drawing errors is reduced.
Owner:李燕

CUTTING MACHINE HEAD AND CUTTING MACHINE WITH IT

Owner:NINGBO JINGWEI SYSTEMTECHNIK LTD

A mobile economic trend plotter

A movable economic trend plotter, characterized in that it comprises a back plate (1), a plotter housing arranged on the front of the back plate (1) and a control unit (2) with a display panel arranged on one side of the back plate (1); At the lower end of the back plate (1) there is an adjustable telescopic rod (3), to the lower end of which a motor housing (4) is attached; at the lower end of the motor housing (4) there is attached a roller holder (5), at the four corners of which rollers (6) are attached; in the motor housing (4) there is a motor 3 (7), the rotating shaft of which is connected to a threaded rod (8); the threaded rod (8) is screwed to a threaded tube (9), the lower end of which projects out of the roller holder (5); at the lower end of the threaded tube (9) there is attached a base (10). On the front of the back plate (1) there is a U-shaped frame (11) with a slot (12) for inserting drawing paper; the four corners of the U-shaped frame (11) are screwed together with clamping screws (13); On the back of the back plate (1) there is a storage compartment (14).
Owner:WANG LIANGDONG HEFEI CITY

A detection device and method for a blast hole for rock blasting

The present application relates to the technical fields of rock blasting, in particular to a kind of detection equipment and method for blasting hole for rock blasting, including drive rotary table, drive assembly is equipped on the drive rotary table, identification device for identifying hole collapse is symmetrically equipped on the drive assembly, both ends of each identification device are equipped with synchronous assembly, one side of the synchronous assembly is equipped with recording assembly, the side end of the recording assembly is equipped with paper outlet assembly, the identification device includes induction assembly and control assembly.The present application can automatically detect hole depth and hole wall hole collapse position by the working of identification device and recording assembly, and record and analyze hole collapse position at the same time, so that detection efficiency and convenience are greatly improved.
Owner:LIAONING ANDA BLASTING ENG CO LTD

A Crack Depth Measurement Instrument for Highway Bridge Tunnels

This invention relates to a crack depth measuring instrument for highway bridge tunnels, comprising a flexible plate; two connecting ropes respectively disposed on both sides of the plate, the lower ends of the two connecting ropes being fixedly connected to the lower end of the plate; two winding wheels respectively mounted on both sides of the plate, the upper ends of the connecting ropes wound around the winding wheels; two linear displacement components, the input ends of which are fixedly connected to the wheel axles of the winding wheels; a crossbar disposed between the two linear displacement components, the two ends of which are respectively connected to the output ends of the corresponding linear displacement components; and a drawing device disposed on one side of the plate for drawing a diagram of the position and direction changes of the crossbar. This invention synchronously transfers the downward movement of the connecting ropes to the output ends of the linear displacement components through the linear displacement components. By setting the crossbar and drawing the position and direction of the crossbar as it moves downward, the direction of the crack can be visually observed, facilitating the assessment of the severity of the crack by the operator.
Owner:NANCHONG VOCATIONAL & TECH COLLEGE +1

Metal set square ruler structure

ActiveCN224240695UWriting aidsCathetusClassical mechanics
The utility model relates to the technical field of measuring tools, in particular to a metal set square ruler structure, which comprises an integrally formed triangular metal substrate, and is characterized in that the triangular metal substrate is integrally of an isosceles triangle structure and is provided with a first right-angle side, a second right-angle side and an inclined side, the first right-angle side, the second right-angle side and the bevel edge are all provided with continuous length scales, according to the metal set square ruler structure, the integrally-formed 6061 aluminum alloy base plate is combined with hard anodic oxidation treatment, the abrasion resistance and the structural strength are remarkably improved, and it is ensured that deformation is avoided after long-term use; metric / English dual-system scales are arranged on the three edges, different measurement requirements are met, oblique dimensions can be directly measured through the bevel edge scales, and the drawing flexibility is improved; a center hollow light-weight groove reduces the weight, meanwhile, three measurement channels extend, two of the three measurement channels are parallel to the right-angle side so that parallel lines can be drawn conveniently or positioning can be assisted, and the third channel provides oblique measurement support.
Owner:HANGZHOU LINMING HARDWARE CO LTD

Geometric figure motion trail display device

The utility model relates to the technical field, in particular to a geometric figure motion trail display device which comprises a bottom plate, a magnetic writing board installed on the bottom plate, a walking plate fixed on the side wall of the magnetic writing board, a limiting rail fixed on the bottom plate, a movable frame installed on the limiting rail in a sliding mode, and an accompanying assembly installed on the movable frame. The accompanying assembly comprises an upper plate, a clamping block is fixed to one side of the upper plate, a lifting mechanism is installed below the clamping block, a figure assembly is rotationally clamped to the lifting mechanism, a vertical hole is formed in the clamping block, and a reinforcing hole is formed in the upper plate. When the device is used, the graphic board with a geometrical shape can roll and walk on the walking board, the magnet block can serve as a paintbrush to scribe on the magnetic writing board, the device is convenient to operate, the graphic board can be driven to roll and advance only by manually pushing the moving frame, and the device is rapid and convenient to use.
Owner:BENGBU COLLEGE

Detection equipment and method for blast hole for rock blasting

The invention relates to the technical field of rock blasting, in particular to blast hole detection equipment and method for rock blasting, and the equipment comprises a driving rotary table, the driving rotary table is provided with a driving assembly, the driving assembly is symmetrically provided with recognition devices for recognizing collapsed holes, and the two ends of each recognition device are provided with synchronization assemblies; a recording assembly is arranged on one side of the synchronizing assembly, a paper outlet assembly is arranged at the side end of the recording assembly, and the recognition device comprises a sensing assembly and a control assembly. Through work of the recognition device and the recording assembly, the hole depth and the hole collapse position of the inner wall of the hole can be automatically detected, meanwhile, the hole collapse position is recorded and analyzed, and the detection efficiency and convenience are greatly improved.
Owner:LIAONING ANDA BLASTING ENG CO LTD

Writing board for calligraphy practice

ActiveCN224210810UEasy to practiceImprove practicalityWriting aidsWriting underlaysPaper sheet
The utility model discloses a writing board for calligraphy practice, and relates to the technical field of writing boards, the writing board comprises a writing board body, the surface of the writing board body is provided with a placing table, the right side of the writing board body is fixedly provided with an ink grinding table, the surface of the ink grinding table is provided with an ink grinding groove, the upper part of the writing board body is provided with a pleat removing mechanism, and the upper part of the writing board body is provided with a pleat removing mechanism. And a storage mechanism is fixedly mounted on the left side of the writing board body. The fixed block is arranged to be matched with the movable column, so that the connecting plate drives the edge pressing frame to press edges of paper placed on the surface of the placing table, meanwhile, the sliding groove is matched with the smoothing plate and the grip, wrinkles on the surface of the paper are smoothed by the smoothing plate, a writer can conveniently and better practice calligraphy, the practicability of the writing board is improved, and the writing board is worthy of popularization and application. The writing brush storing and taking box is arranged to be matched with the movable roller, the surface of the writing brush storing and taking box is conveniently covered with the cover plate, meanwhile, the inserting groove is matched with the inserting block, the sealing performance of the writing brush storing and taking box is better, and the writing brush storing effect is improved.
Owner:ZHANJIANG XIASHAN DISTRICT ZEXI ART TRAINING CENTER CO LTD

A drawing tool for urban and rural planning design

This utility model relates to the field of urban and rural planning, specifically a drawing tool for urban and rural planning design, comprising: a base plate and a drawing board disposed on top of it; by setting a pressure roller under the sliding plate in the drawing component, the pressure roller is made of silicone, which can use the elastic properties of silicone to press and position the drawing paper when the operator is drawing, and at the same time, the pressure roller rolls on the paper when the sliding plate moves, which can effectively avoid the problem of paper slippage or deviation due to friction; by setting an auxiliary device and a pointer, when the operator is adjusting the sliding plate for drawing, the auxiliary device can turn and emit a beam of light according to the operator's needs, so as to facilitate the operator to accurately align the drawing position with the upper and lower scales of the scale ring, and at the same time, the pointer on the side can be aligned with the scales on both sides of the scale ring, which can accurately assist the operator in drawing the drawing, improving the drawing quality and accuracy.
Owner:肖进兴

Blackboard scriber for English teaching

ActiveCN223904777UWriting aidsSupport planeChalk line
The utility model relates to the technical field of English teaching appliances, and discloses a blackboard scriber for English teaching, which comprises a blackboard body, a support frame is arranged on the left side of the front side of the blackboard body, the outer wall of the support frame is sleeved with a limiting block in a sliding manner, iron bars are fixedly embedded on two sides of the support frame, and the limiting block is arranged on the right side of the blackboard body. The device comprises a supporting frame, an iron bar, a limiting block, a sliding block, a limiting frame and a sliding groove are fixedly installed on the supporting frame, magnetic sheets are fixedly embedded in the two sides of the inner wall of the limiting block, the outer walls of the magnetic sheets are magnetically connected to one side of the iron bar, and a lineation fixing plate is fixedly installed on the right side of the limiting block. The supporting frame, the iron bar, the limiting block, the magnetic sheets, the lineation fixing plate, an installation barrel, chalk, the sliding block, the limiting frame and the sliding groove are matched; a teacher can conveniently adjust the height of the chalks during scribing, and the four chalks can be driven to horizontally move on the blackboard at the same time, so that four auxiliary lines for English writing are quickly scribed on the blackboard by using the four chalks, and the scribing efficiency is improved and the teaching time is prolonged by adopting the mode.
Owner:LIJIN COUNTY CHENZHUANG TOWN CENTRAL SCHOOL