CN108973455B - English teaching blackboard convenient for writing English words - Google Patents
English teaching blackboard convenient for writing English words Download PDFInfo
- Publication number
- CN108973455B CN108973455B CN201810887045.3A CN201810887045A CN108973455B CN 108973455 B CN108973455 B CN 108973455B CN 201810887045 A CN201810887045 A CN 201810887045A CN 108973455 B CN108973455 B CN 108973455B
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- sliding
- fixedly connected
- shaft
- blackboard
- brush
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/001—Mathematical drawing instruments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/004—Manual lettering devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
- B43L13/04—Guides for rulers
- B43L13/041—Guides for rulers with toothed racks
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- Brushes (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The invention relates to the field of English teaching blackboards, in particular to an English teaching blackboard convenient for writing English words. The blackboard comprises a blackboard body, a transverse sliding device, a longitudinal sliding device, a pressing device, a linkage brush base and linkage brushes, wherein the blackboard comprises two blackboard supports, a transverse sliding rod I, a transverse sliding rod II and two blackboard supports, the transverse sliding rod II and the transverse sliding rod I are respectively and fixedly connected to the upper end and the lower end of the blackboard body, and the two blackboard supports are respectively and fixedly connected to the two ends of the rear end of the blackboard body; the distance between the brush heads can be adjusted at equal intervals by adjusting the handles on the linkage brushes, so that the line width reaches the required width and is equal to the width, after the linkage brushes are adjusted to the required height by the longitudinal sliding device, the linkage brushes can be transversely slid by the transverse sliding device to draw a row of regular four lines and three grids, and the problems that an English teacher needs to manually draw the four lines and the three grids are labor-consuming and the drawn four lines and the three grids are not neat when the traditional blackboard is used are solved.
Description
Technical Field
The invention relates to the field of English teaching blackboards, in particular to an English teaching blackboard convenient for writing English words.
Background
For example, patent application number is CN 201720081908.9's a three check blackboards of english teaching, blackboard PMKD's be provided with the marker pen on the surface and write the fixed plate, and blackboard PMKD's edge is provided with fixing bolt, the marker pen writes that the fixed plate is provided with three check lines of english on the surface, and one side of marker pen writing fixed plate is provided with the rotation hinge, and one side of rotating the hinge is provided with the marker pen writing movable plate, one side that the marker pen written the movable plate is provided with the movable plate handle. The utility model discloses a directly set up the line check of english on the fixed plate is write to the marker pen, can't adjust the line width according to actual demand, and the marker pen writes that the english line check on the fixed plate can influence the use of other subjects, and the limitation is very big, consequently designs a english teaching blackboard of conveniently writing english word.
Disclosure of Invention
The invention aims to provide an English teaching blackboard convenient for writing English words, wherein three four-line grids can be drawn at required positions on the blackboard through a linkage brush, the line width can be adjusted at equal intervals according to actual requirements by adjusting a brush head of the linkage brush, the three drawn four-line grids can be erased after use, the linkage brush can be slid to one end through a sliding device when other subjects use the blackboard, and the blackboard used by other subjects is not influenced.
The purpose of the invention is realized by the following technical scheme:
an English teaching blackboard convenient for writing English words comprises a blackboard body, a transverse sliding device, a longitudinal sliding device, a pressing device, a linkage brush base and a linkage brush, wherein the blackboard comprises a blackboard body, a transverse sliding rod I, a transverse sliding rod II and blackboard supports;
the transverse sliding device comprises a transverse sliding block I, a transverse sliding block II and two longitudinal sliding rods, wherein the two longitudinal sliding rods are arranged, two ends of each longitudinal sliding rod are fixedly connected to two ends of the inner sides of the transverse sliding block II and the transverse sliding block I respectively, the transverse sliding block I is connected to the transverse sliding rod I in a sliding fit mode, and the transverse sliding block II is connected to the transverse sliding rod II in a sliding fit mode;
the longitudinal sliding device comprises a longitudinal sliding block, a door-shaped clamping shaft, a screw rod seat, two rotary screw rods, a crank and longitudinal sliding holes, wherein the door-shaped clamping shaft is connected in the longitudinal sliding block in a sliding fit manner, the screw rod seat is fixedly connected to the longitudinal sliding block, one end of each rotary screw rod is fixedly connected with the crank, the other end of each rotary screw rod is connected in the screw rod seat in a rotating fit manner, the front end of each rotary screw rod is connected in the door-shaped clamping shaft through threads, the longitudinal sliding holes are arranged at two ends of the longitudinal sliding block respectively, the two longitudinal sliding holes penetrate through the longitudinal sliding block respectively, the rear end of the door-shaped clamping shaft is inserted into the two longitudinal sliding holes respectively, and the two longitudinal sliding holes are connected to the two longitudinal sliding rods in a sliding fit manner respectively;
the pressing device comprises a connecting plate I, a connecting plate II, limiting columns, spring columns and compression springs, wherein the number of the limiting columns is two, one ends of the two limiting columns are fixedly connected to the two ends of the connecting plate I respectively, the other ends of the two limiting columns are connected to the two ends of the connecting plate II respectively in a sliding fit mode, one end of each spring column is fixedly connected to the middle end of the connecting plate I, the other end of each spring column is connected to the middle end of the connecting plate II in a sliding fit mode, one end of the connecting plate II is fixedly connected to a longitudinal sliding block, the other end of the connecting plate I is fixedly connected to a linkage brush base, each spring column is provided with one compression spring, and each compression spring is arranged between the connecting plate I and;
the linkage brush base comprises a support plate, a rotating shaft chute, a brush head support groove, an adjusting support rod, a handle, a rocker arm I, a rocker arm II, a fastening screw rod, a fixed rack, a guide trapezoidal groove and a support trapezoidal groove, wherein the middle end of the support plate is fixedly connected with the rotating shaft chute, the brush head support groove is fixedly connected with one end of the support plate, the other end of the support plate is provided with the support trapezoidal groove, the middle end of the support plate is fixedly connected with the adjusting support rod, the adjusting support rod is arranged between the rotating shaft chute and the support trapezoidal groove, the handle is connected on the adjusting support rod in a sliding fit manner, the handle is vertical to the support plate, the front ends of the rocker arm I and the rocker arm II are hinged on the handle, the fastening screw rod is connected in the adjusting support rod through threads, the inner side of the fastening screw rod is propped against the handle, two guide trapezoidal grooves are formed in the supporting plate, the two guide trapezoidal grooves are respectively formed in the two ends of the adjusting support rod, the distance between the two trapezoidal grooves and the rotating shaft sliding groove is equal, and one end, provided with a supporting trapezoidal groove, of the supporting plate is fixedly connected to the connecting plate I;
the linkage brush comprises a sliding shaft, a gasket, two outer gear rings, a driving pulley I, a rotating shaft, a driving pulley II, a gear, a driving rack, a rack frame, a guide slider, a brush head bracket, a connecting shaft, a sliding bracket, a brush head, chalk, a connecting rod and a supporting rod, wherein one end of the sliding shaft is fixedly connected with one end of the gasket, the connecting shaft is fixedly connected with the other end of the gasket, the other end of the sliding shaft is fixedly connected with the driving pulley I, the two outer gear rings are both fixedly connected on the sliding shaft, the two outer gear rings are arranged between the gasket and the driving pulley I, the driving pulley II is fixedly connected with one end of the rotating shaft, the gear is fixedly connected with the other end of the rotating shaft, the driving pulley I is connected with the driving pulley II in a matched manner through belt transmission, one ends of the two rack frames are, the other ends of the two racks are respectively and fixedly connected to two ends of the guide sliding block, one end of the brush head support is fixedly connected to the rack on the outer side, two brush heads are arranged, a piece of chalk is connected to the inside of each brush head in an interference fit mode, one brush head is fixedly connected to the other end of the brush head support, the other end of the brush head support is fixedly connected to one end of the sliding support, a support shaft is arranged at the other end of the sliding support, the sliding support is connected to the inside of the connecting shaft through a support shaft in a rotating fit mode, the rotating shaft is connected to one end of the connecting rod in a rotating fit mode, the connecting rod is arranged between the transmission belt wheel II and the gear, the;
the sliding shaft is connected in a sliding way of the rotating shaft, the two outer gear rings are respectively meshed with and driven by the fixed racks on two sides of the sliding way of the rotating shaft, the guide sliding block is connected in a guide trapezoidal groove on one end in a sliding way, the brush head bracket is connected in a brush head bracket groove in a sliding way, the sliding bracket is connected in a brush head bracket groove in a sliding way, the brush head bracket is positioned on the outer side of the sliding bracket in the brush head bracket groove, and the bottom end of the supporting rod is connected in a supporting trapezoidal groove in a;
the linkage brush be equipped with two, two linkage brush symmetries set up on linkage brush base, the sliding shaft normal running fit of the linkage brush that is located the below is connected at the rear end of rocking arm I, rocking arm I sets up between the gasket of the linkage brush that is located the below and the outer ring gear that is close to the gasket, the sliding shaft normal running fit of the linkage brush that is located the top is connected at the rear end of rocking arm II, rocking arm II sets up and is located between the gasket of the linkage brush in top and the outer ring gear that is close to the gasket.
The length of the rocker arm I is equal to that of the rocker arm II.
The diameter of the outer ring of the driving belt wheel I is twice that of the outer ring of the driving belt wheel II.
The number and the modulus of the teeth of the outer gear ring and the teeth of the outer gear ring are the same.
The transmission rack and the fixed rack have the same size.
The rotating shaft sliding groove, the brush head support groove, the fixed rack, the guide trapezoidal groove and the support trapezoidal groove are parallel to each other.
The invention has the beneficial effects that:
according to the invention, the height of the linkage brush can be adjusted on the blackboard through the transverse sliding device and the longitudinal sliding device, the linkage brush can transversely slide, the pressing device is connected to the linkage brush base, chalks on the linkage brush are supported on the blackboard surface plate, the distance between each brush head can be adjusted at equal intervals by adjusting the handle on the linkage brush when the linkage brush is used, the line width reaches the required width and is equal to the width, after the linkage brush is adjusted to the required height through the longitudinal sliding device, a row of regular four-line three grids can be drawn by transversely sliding the linkage brush through the transverse sliding device, and the problems that an English teacher needs to manually draw the four-line three grids, the labor is wasted, and the drawn four-line three grids are not regular when the traditional blackboard is used are solved; when the four-line three-grid drawing is not needed, the linkage brush can be slid to one end of the blackboard, so that the use of other subjects is prevented from being hindered; in addition, the invention can be used in subjects needing to draw straight lines such as Chinese and mathematics, four-line three-grid is also used in phonetic teaching of Chinese, chalks on three brush heads of the linkage brush are taken down in the four brush heads during the mathematical teaching, and a single straight line can be drawn through the linkage brush heads by the transverse sliding device and the longitudinal sliding device, so that a mathematic teacher can draw square, rectangular and other shapes, and the teaching of the teacher is facilitated.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of the structure of the present invention;
FIG. 3 is a schematic diagram of the blackboard construction of the present invention;
FIG. 4 is a schematic view of the lateral sliding apparatus of the present invention;
FIG. 5 is a schematic view of the longitudinal slide of the present invention;
FIG. 6 is a schematic view of a partial structure of the longitudinal slide of the present invention;
FIG. 7 is a schematic view of the longitudinal slider configuration of the present invention;
FIG. 8 is a schematic view of a door clamping shaft of the present invention;
FIG. 9 is a schematic view of the construction of the compacting apparatus of the present invention;
FIG. 10 is a schematic view of a linkage brush base structure according to the present invention;
FIG. 11 is a schematic view of a portion of the construction of the base of the linked brush of the present invention;
FIG. 12 is a first schematic view of a linked brush according to the present invention;
FIG. 13 is a second schematic structural view of a linked brush according to the present invention;
FIG. 14 is a first view of a portion of the construction of the linked brush of the present invention;
FIG. 15 is a second schematic view of a portion of the linkage brush of the present invention;
FIG. 16 is a third schematic view of a portion of the construction of the linked brush of the present invention;
FIG. 17 is a fourth schematic view of a portion of the linked brush of the present invention.
In the figure: a blackboard 1; 1-1 parts of a blackboard body; a transverse sliding rod I1-2; a horizontal sliding rod II 1-3; 1-4 parts of a blackboard support; a lateral sliding device 2; a transverse sliding block I2-1; a transverse sliding block II 2-2; 2-3 of a longitudinal slide bar; a longitudinal sliding device 3; 3-1 of a longitudinal slide block; a door-shaped clamping shaft 3-2; 3-3 of a screw seat; rotating the screw rods 3-4; 3-5 of a crank; 3-6 of longitudinal sliding holes; a pressing device 4; a connecting plate I4-1; a connecting plate II 4-2; 4-3 of a limiting column; 4-4 of a spring post; 4-5 of a compression spring; a linkage brush base 5; a support plate 5-1; a rotating shaft chute 5-2; 5-3 brush head bracket grooves; 5-4 of an adjusting strut; 5-5 of a handle; 5-6 parts of rocker arm I; 5-7 of a rocker arm II; 5-8 parts of a fastening screw; fixing a rack 5-9; 5-10 parts of a guide trapezoidal groove; supporting the trapezoidal grooves 5-11; a linkage brush 6; a sliding shaft 6-1; 6-2 of a gasket; 6-3 of an outer gear ring; 6-4 of a transmission belt wheel; 6-5 of a rotating shaft; a transmission belt wheel II 6-6; 6-7 parts of gear; a transmission rack 6-8; 6-9 of a rack frame; 6-10 parts of a guide slide block; 6-11 parts of brush head bracket; connecting shafts 6-12; 6-13 of a sliding bracket; 6-14 parts of brush head; 6-15 parts of chalk; connecting rods 6-16; and 6-17 of supporting rods.
Detailed Description
The invention is described in further detail below with reference to fig. 1-17.
The first embodiment is as follows:
as shown in fig. 1-17, an english teaching blackboard convenient for writing english words comprises a blackboard body 1, a lateral sliding device 2, a longitudinal sliding device 3, a pressing device 4, a linkage brush base 5 and a linkage brush 6, wherein the blackboard body 1 comprises a blackboard plate body 1-1, a lateral sliding rod i 1-2, a lateral sliding rod ii 1-3 and a blackboard support 1-4, the lateral sliding rod ii 1-3 and the lateral sliding rod i 1-2 are respectively and fixedly connected to the upper end and the lower end of the blackboard body 1-1, the blackboard support 1-4 is provided with two, and the two blackboard supports 1-4 are respectively and fixedly connected to the two ends of the rear end of the blackboard body 1-1; the blackboard body 1-1 can be supported on the ground by the two blackboard supports 1-4.
The transverse sliding device 2 comprises a transverse sliding block I2-1, a transverse sliding block II 2-2 and longitudinal sliding rods 2-3, the number of the longitudinal sliding rods 2-3 is two, two ends of the two longitudinal sliding rods 2-3 are fixedly connected to two ends of the inner sides of the transverse sliding block II 2-2 and the transverse sliding block I2-1 respectively, the transverse sliding block I2-1 is connected to the transverse sliding rod I1-2 in a sliding fit mode, and the transverse sliding block II 2-2 is connected to the transverse sliding rod II 1-3 in a sliding fit mode; the transverse sliding device 2 can transversely slide on the blackboard 1 by connecting the transverse sliding block I2-1 to the transverse sliding rod I1-2 in a sliding fit mode and connecting the transverse sliding block II 2-2 to the transverse sliding rod II 1-3 in a sliding fit mode, so that the transverse position of the transverse sliding device 2 on the blackboard 1 can be adjusted.
The longitudinal sliding device 3 comprises a longitudinal sliding block 3-1, a door-shaped clamping shaft 3-2, a screw rod seat 3-3, a rotating screw rod 3-4, a crank 3-5 and a longitudinal sliding hole 3-6, the door-shaped clamping shaft 3-2 is connected in the longitudinal sliding block 3-1 in a sliding fit manner, the screw rod seat 3-3 is fixedly connected on the longitudinal sliding block 3-1, one end of the rotating screw rod 3-4 is fixedly connected with one crank 3-5, the other end of the rotating screw rod 3-4 is connected in the screw rod seat 3-3 in a rotating fit manner through a bearing with a seat, the front end of the rotating screw rod 3-4 is connected in the door-shaped clamping shaft 3-2 through threads, two longitudinal sliding holes 3-6 are arranged, and the two longitudinal sliding holes 3-6 are respectively arranged at two ends of the longitudinal sliding block 3-1, the two longitudinal sliding holes 3-6 penetrate through the longitudinal sliding block 3-1, the rear ends of the door-shaped clamping shafts 3-2 are respectively inserted into the two longitudinal sliding holes 3-6, and the two longitudinal sliding holes 3-6 are respectively connected to the two longitudinal sliding rods 2-3 in a sliding fit manner; the longitudinal sliding blocks 3-1 can slide longitudinally on the transverse sliding device 2 through the longitudinal sliding holes 3-6 at the two ends which are respectively connected on the longitudinal sliding rods 2-3 at the two ends in a sliding fit manner, thus, the longitudinal position of the longitudinal slide block 3-1 on the transverse sliding device 2 can be adjusted, after the position of the longitudinal slide block 3-1 is adjusted to the required position, the crank handle 3-5 is rotated to rotate the rotary screw rod 3-4, the rotary screw rod 3-4 pushes the front end of the door-shaped clamping shaft 3-2 to extrude the longitudinal slide rod 2-3 through the threaded connection with the door-shaped clamping shaft 3-2, the bottom end of the door-shaped clamping shaft 3-2 is designed to be arc-shaped, the contact area with the longitudinal slide bar 2-3 can be increased, when the front end of the portal clamping shaft 3-2 extrudes the longitudinal slide bar 2-3, the longitudinal slide block 3-1 can be fixed on the door-shaped clamping shaft 3-2 through friction force.
The pressing device 4 comprises a connecting plate I4-1, a connecting plate II 4-2, two limiting columns 4-3, spring columns 4-4 and compression springs 4-5, wherein one end of each limiting column 4-3 is fixedly connected with the two ends of the connecting plate I4-1, the other ends of the two limiting columns 4-3 are connected with the two ends of the connecting plate II 4-2 in a sliding fit mode, one end of each spring column 4-4 is fixedly connected with the middle end of the connecting plate I4-1, the other end of each spring column 4-4 is connected in the middle end of the connecting plate II 4-2 in a sliding fit mode, one end of the connecting plate II 4-2 is fixedly connected with a longitudinal sliding block 3-1, the other end of the connecting plate I4-1 is fixedly connected with a linkage brush base 5, one compression spring 4-5 is arranged on each spring column 4-4, the compression spring 4-5 is arranged between the connecting plate I4-1 and the connecting plate II 4-2; after the connecting plate II 4-2 is fixedly connected to the longitudinal sliding block 3-1, the compression spring 4-5 applies thrust to the connecting plate I4-1 towards the blackboard body 1-1, and the connecting plate I4-1 is fixedly connected to the linkage brush base 5, so that the linkage brush base 5 is subjected to the thrust towards the blackboard body 1-1. When the linkage brush base 5 needs to be moved, the spring columns 4-4 are pulled out, so that the linkage brush base 5 can be lifted, the linkage brush 6 leaves the blackboard, and lines cannot be drawn on the blackboard continuously.
The linkage brush base 5 comprises a support plate 5-1, a rotating shaft chute 5-2, a brush head support groove 5-3, an adjusting support rod 5-4, a handle 5-5, a rocker arm I5-6, a rocker arm II 5-7, a fastening screw 5-8, a fixed rack 5-9, a guide trapezoidal groove 5-10 and a support trapezoidal groove 5-11, wherein the middle end of the support plate 5-1 is fixedly connected with the rotating shaft chute 5-2, the brush head support groove 5-3 is fixedly connected with one end of the support plate 5-1, the other end of the support plate 5-1 is provided with the support trapezoidal groove 5-11, the middle end of the support plate 5-1 is fixedly connected with the adjusting support rod 5-4, the adjusting support rod 5-4 is arranged between the rotating shaft chute 5-2 and the support trapezoidal groove 5-11, the handle 5-5 is connected on the adjusting support rod 5-4 in a sliding fit mode, the handle 5-5 is perpendicular to the support plate 5-1, the front ends 5-7 of the rocker arm I5-6 and the rocker arm II are hinged on the handle 5-5, the fastening screw rod 5-8 is connected in the adjusting support rod 5-4 through threads, the inner side of the fastening screw rod 5-8 is abutted against the handle 5-5, the support plate 5-1 is fixedly connected with two fixed racks 5-9, the inner sides of the two fixed racks 5-9 are respectively attached to two sides of the rotating shaft sliding groove 5-2, the support plate 5-1 is provided with two guide trapezoidal grooves 5-10, the two guide trapezoidal grooves 5-10 are respectively arranged at two ends of the adjusting support rod 5-4, the distances between the two trapezoidal grooves 5-10 and the rotating shaft sliding groove 5-2 are equal, one end of the supporting plate 5-1 provided with a supporting trapezoidal groove 5-11 is fixedly connected to the connecting plate I4-1; the handle 5-5 can slide in the adjusting support rod 5-4, after the position of the handle 5-5 is adjusted up and down, the fastening screw 5-8 is screwed on the adjusting support rod 5-4 to enable the inner side of the fastening screw 5-8 to prop against the handle 5-5, and then the position of the handle 5-5 can be fixed.
The linkage brush 6 comprises a sliding shaft 6-1, a gasket 6-2, an outer gear ring 6-3, a transmission belt wheel I6-4, a rotating shaft 6-5, a transmission belt wheel II 6-6, a gear 6-7, a transmission rack 6-8, a rack frame 6-9, a guide slider 6-10, a brush head bracket 6-11, a connecting shaft 6-12, a sliding bracket 6-13, a brush head 6-14, chalk 6-15, a connecting rod 6-16 and a supporting rod 6-17, wherein one end of the sliding shaft 6-1 is fixedly connected with one end of the gasket 6-2, the connecting shaft 6-12 is fixedly connected with the other end of the gasket 6-2, the other end of the sliding shaft 6-1 is fixedly connected with the transmission belt wheel I6-4, and the number of the outer gear rings 6-3 is two, two outer gear rings 6-3 are fixedly connected to a sliding shaft 6-1, two outer gear rings 6-3 are arranged between a gasket 6-2 and a driving belt wheel I6-4, a driving belt wheel II 6-6 is fixedly connected to one end of a rotating shaft 6-5, a gear 6-7 is fixedly connected to the other end of the rotating shaft 6-5, the driving belt wheel I6-4 is connected with the driving belt wheel II 6-6 in a belt transmission matching manner, one ends of two rack frames 6-9 are respectively fixedly connected to two ends of a driving rack 6-8, the gear 6-7 is in meshing transmission with the driving rack 6-8, the other ends of the two rack frames 6-9 are respectively fixedly connected to two ends of a guide sliding block 6-10, one end of a brush head support 6-11 is fixedly connected to the rack frame 6-9 on the outer side, two brush heads 6-14 are provided, wherein a piece of chalk 6-15 is connected in the two brush heads 6-14 in an interference fit manner, one brush head 6-14 is fixedly connected at the other end of a brush head bracket 6-11, the other brush head 6-14 is fixedly connected at one end of a sliding bracket 6-13, the other end of the sliding bracket 6-13 is provided with a fulcrum shaft, the fulcrum shaft of the sliding bracket 6-13 is connected in a connecting shaft 6-12 in a rotating fit manner through a bearing with a seat, a rotating shaft 6-5 is connected at one end of a connecting rod 6-16 in a rotating fit manner through the bearing with the seat, the connecting rod 6-16 is arranged between a transmission belt wheel II 6-6 and a gear 6-7, the other end of the connecting rod 6-16 is provided with the fulcrum shaft, the fulcrum shaft of the connecting, the outer end of the rotating shaft 6-5 is connected on the supporting rod 6-17 in a rotating fit manner through a bearing with a seat;
a sliding shaft 6-1 is connected in a sliding fit manner in a rotating shaft sliding groove 5-2, two outer gear rings 6-3 are respectively meshed with fixed racks 5-9 at two sides of the rotating shaft sliding groove 5-2 for transmission, a guide sliding block 6-10 is connected in a guide trapezoidal groove 5-10 at one end in a sliding fit manner, a brush head support 6-11 is connected in a brush head support groove 5-3 in a sliding fit manner, a sliding support 6-13 is connected in the brush head support groove 5-3 in a sliding fit manner, the brush head support 6-11 is positioned at the outer side of the sliding support 6-13 in the brush head support groove 5-3, and the bottom end of a support rod 6-17 is connected in a support trapezoidal groove 5-11 in;
the two linkage brushes 6 are symmetrically arranged on a linkage brush base 5, a sliding shaft 6-1 of the linkage brush 6 positioned below is connected to the rear end of a rocker arm I5-6 in a rotating fit mode through a bearing with a seat, the rocker arm I5-6 is arranged between a gasket 6-2 of the linkage brush 6 positioned below and an outer gear ring 6-3 close to the gasket 6-2, a sliding shaft 6-1 of the linkage brush 6 positioned above is connected to the rear end of a rocker arm II 5-7 in a rotating fit mode through a bearing with a seat, and the rocker arm II 5-7 is arranged between the gasket 6-2 of the linkage brush 6 positioned above and the outer gear ring 6-3 close to the gasket 6-2. When the line width needs to be adjusted, the position of the handle 5-5 is adjusted, the handle 5-5 drives the rocker arm I5-6 and the rocker arm II 5-7 through hinging, the rocker arm I5-6 drives the sliding shaft 6-1 below to slide in the rotating shaft sliding groove 5-2, the sliding shaft 6-1 is driven by the rocker arm I5-6 to move when being driven in the rotating shaft sliding groove 5-2 due to the fact that the outer gear rings 6-3 at two ends are meshed with the fixed gear racks 5-9, the sliding shaft 6-1 rotates, the rotation generated by the sliding shaft 6-1 is transmitted to the transmission belt wheel II 6-6 through the transmission belt wheel I6-4, the distance between the transmission belt wheel I6-4 and the rotating shaft 6-5 is kept constant through the connecting rod 6-16, when the sliding shaft 6-1 moves, the connecting rod 6-16 drives the rotating shaft 6-5, the rotating shaft 6-5 drives the supporting rod 6-17 to slide in the supporting trapezoidal groove 5-11, the supporting rod 6-17 plays a supporting role for the rotating shaft 6-5 and can move along with the movement of the rotating shaft 6-5, so that the sliding shaft 6-1 can be driven by the movable rocker arm I5-6 to move and rotate the sliding shaft 6-1, the rotating shaft 6-5 is driven by the sliding shaft 6-1 through the supporting rod 6-17 to move, the distance between the sliding shaft 6-1 and the rotating shaft 6-5 is fixed, and the transmission belt pulley I6-4 on the sliding shaft 6-1 can drive the transmission belt pulley II 6-6 to rotate through belt transmission; the transmission belt wheel II 6-6 drives the gear 6-7 to rotate through the rotating shaft 6-5, the gear 6-7 drives the transmission rack 6-8 through meshing transmission with the transmission rack 6-8, two ends of the transmission rack 6-8 are fixedly connected with rack frames 6-9, the rack frames 6-9 support the transmission rack 6-8, the guide sliders 6-10 at the bottom ends of the two rack frames 6-9 slide in the support trapezoidal grooves 5-11, the transmission rack 6-8 can slide in the support trapezoidal grooves 5-11 through the guide sliders 6-10 and the rack frames 6-9, when the gear 6-7 rotates, the transmission rack 6-8 is pushed through meshing, the transmission rack 6-8 drives the guide sliders 6-10 to slide in the support trapezoidal grooves 5-11 through the rack frames 6-9, the rack 6-9 drives the brush head bracket 6-11 to move, the front end of the brush head bracket 6-11 and the sliding bracket 6-13 slide in the brush head bracket groove 5-3, the sliding bracket 6-13 is designed into a square shape and can not rotate in the brush head bracket groove 5-3, so as to ensure that the brush head 6-14 on the sliding bracket 6-13 is always vertical to the blackboard body 1-1, the driving belt wheel I6-4 is provided with a bearing hole, the other end of the connecting rod 6-16 is provided with a fulcrum shaft, the fulcrum shaft of the connecting rod 6-16 is connected in the bearing hole of the driving belt wheel I6-4 in a rotating fit way through a belt seat bearing, the connecting shaft 6-12 is provided with a bearing hole, the fulcrum shaft on the sliding bracket 6-13 is connected in the bearing hole of the connecting shaft 6, the connecting shaft 6-12 is fixedly connected to the gasket 6-2, so that the sliding shaft 6-1 can drive the sliding support 6-13 to slide in the brush head support groove 5-3, but the sliding support 6-13 does not rotate along with the sliding shaft 6-1, the brush head 6-14 is arranged on the brush head support 6-11 and the sliding support 6-13, chalk 6-15 is arranged in the brush head 6-14, the connecting plate I4-1 applies thrust to the support plate 5-1 towards the blackboard body 1-1 through the compression spring 4-5, the brush head support groove 5-3 on the support plate 5-1 drives the brush head support 6-11 and the sliding support 6-13, and finally the brush head support 6-11 and the sliding support 6-13 drive the chalk 6-15 on the brush head 6-14, the chalk 6-15 is pressed against the blackboard body 1-1, the linkage brush base 5 is slid through the transverse sliding device 2 and the longitudinal sliding device 3, so that the chalk 6-15 can draw a line on the blackboard, and the principle that the rocker arm II 5-7 drives the linkage brush 6 above is the same as that of the linkage brush 6 below driven by the rocker arm I5-6.
The lengths of the rocker arms I5-6 and the rocker arms II 5-7 are equal; the diameters of the transmission belt wheel I6-4 and the transmission belt wheel II 6-6 are the same; the number of teeth and the modulus of the outer gear ring 6-3 and the gear 6-7 are the same; the transmission rack 6-8 and the fixed rack 5-9 have the same size; the rotating shaft sliding groove 5-2, the brush head support groove 5-3, the fixed rack 5-9, the guide trapezoidal groove 5-10 and the support trapezoidal groove 5-11 are all parallel to each other. The lengths of the rocker arms I5-6 and the rocker arms II 5-7 are equal, so that when the handle 5-5 is moved, the rocker arms I5-6 and the rocker arms II 5-7 respectively drive the two sliding shafts 6-1 to move for the same distance; because the diameter of the outer ring of the transmission belt wheel I6-4 is twice that of the outer ring of the transmission belt wheel II 6-6, the number of teeth and the modulus of the outer gear ring 6-3 and the gear 6-7 are the same, and the size of the transmission rack 6-8 and the fixed rack 5-9 is the same, when the rotation of the outer gear ring 6-3 is transmitted to the transmission belt wheel II 6-6 through the transmission belt wheel I6-4, and the transmission belt wheel II 6-6 drives the gear 6-7 to rotate, the transmission ratio of the outer gear ring 6-3 and the gear 6-7 is one to two; when the sliding shaft 6-1 moves, the external gear ring 6-3 can be rotated by the meshing of the external gear ring 6-3 and the fixed rack 5-9, when the transmission ratio of the external gear ring 6-3 to the gear 6-7 is one to two, the transmission rack 6-8 and the fixed rack 5-9 have the same size, so that the gear 6-7 can push out the transmission rack 6-8 twice as long as the sliding shaft 6-1 moves, because the sliding shaft 6-1 drives the rotating shaft 6-5 to move, the gear 6-7 also follows the movement of the external gear ring 6-3 when moving, and the gear 6-7 pushes the transmission rack 6-8 out of the sliding shaft 6-1 twice as long as the movement of the sliding shaft 6-1, so that the transmission rack 6-8 drives the rotating shaft 6-5 to move by the sliding shaft 6-1 and follows the sliding shaft 6-1 to move for the same distance as the sliding shaft 6-1 The distance pushed out by the transmission racks 6-8 is added by the gears 6-7 to be three times of the distance moved by the sliding shaft 6-1, so that each time the sliding shaft 6-1 moves one end, the distance moved by the transmission racks 6-8 is three times of the distance moved by the sliding shaft 6-1, when in actual use, the position of the handle 5-5 is pulled, the handle 5-5 drives the rocker arm I5-6 and the rocker arm II 5-7 through hinging, the rocker arm I5-6 and the rocker arm II 5-7 drive the two sliding shafts 6-1 to move in opposite directions in equal amount, the brush heads 6-14 on the two sliding brackets 6-13 move relatively, so that when the single sliding shaft 6-1 moves for a certain distance, the distance changed between the brush heads 6-14 on the two sliding brackets 6-13 is twice of the distance moved by the sliding shaft 6-1, the two brush heads 6-14 on the same linkage brush 6 move in the same direction, so the distance of each brush head 6-14 can be kept constant only by the transmission rack 6-8 driving the brush heads 6-14 on the brush head bracket 6-11 to move three times of the distance moved by the adjacent sliding shaft 6-1, thereby realizing the adjustment of the distance between the brush heads 6-14 to adjust the drawn line width and keeping the line width uniform. The lines drawn by the brush heads 6-14 are chalk lines which can be erased by a blackboard eraser. The fixed connection in the invention refers to fixing through welding, thread fixing and other modes, and different fixing modes are used in combination with different use environments.
The working principle of the invention is as follows:
the blackboard body 1-1 can be supported on the ground by the two blackboard supports 1-4; the transverse sliding device 2 can transversely slide on the blackboard 1 by connecting the transverse sliding block I2-1 to the transverse sliding rod I1-2 in a sliding fit mode and connecting the transverse sliding block II 2-2 to the transverse sliding rod II 1-3 in a sliding fit mode, so that the transverse position of the transverse sliding device 2 on the blackboard 1 can be adjusted; the longitudinal sliding blocks 3-1 can slide longitudinally on the transverse sliding device 2 through the longitudinal sliding holes 3-6 at the two ends which are respectively connected on the longitudinal sliding rods 2-3 at the two ends in a sliding fit manner, thus, the longitudinal position of the longitudinal slide block 3-1 on the transverse sliding device 2 can be adjusted, after the position of the longitudinal slide block 3-1 is adjusted to the required position, the crank handle 3-5 is rotated to rotate the rotary screw rod 3-4, the rotary screw rod 3-4 pushes the front end of the door-shaped clamping shaft 3-2 to extrude the longitudinal slide rod 2-3 through the threaded connection with the door-shaped clamping shaft 3-2, the bottom end of the door-shaped clamping shaft 3-2 is designed to be arc-shaped, the contact area with the longitudinal slide bar 2-3 can be increased, when the front end of the portal clamping shaft 3-2 extrudes the longitudinal slide bar 2-3, the longitudinal slide block 3-1 can be fixed on the door-shaped clamping shaft 3-2 through friction force; after the connecting plate II 4-2 is fixedly connected to the longitudinal sliding block 3-1, the compression spring 4-5 applies thrust to the connecting plate I4-1 towards the blackboard body 1-1, and the connecting plate I4-1 is fixedly connected to the linkage brush base 5, so that the linkage brush base 5 is subjected to the thrust towards the blackboard body 1-1. When the linkage brush base 5 needs to be moved, the spring column 4-4 is pulled out, so that the linkage brush base 5 can be lifted, the linkage brush 6 leaves the blackboard, and a line cannot be drawn on the blackboard continuously; the handle 5-5 can slide in the adjusting support rod 5-4, after the position of the handle 5-5 is adjusted up and down, the fastening screw 5-8 is screwed on the adjusting support rod 5-4 to enable the inner side of the fastening screw 5-8 to prop against the handle 5-5, and then the position of the handle 5-5 can be fixed; when the line width needs to be adjusted, the position of the handle 5-5 is adjusted, the handle 5-5 drives the rocker arm I5-6 and the rocker arm II 5-7 through hinging, the rocker arm I5-6 drives the sliding shaft 6-1 below to slide in the rotating shaft sliding groove 5-2, the sliding shaft 6-1 is driven by the rocker arm I5-6 to move when being driven in the rotating shaft sliding groove 5-2 due to the fact that the outer gear rings 6-3 at two ends are meshed with the fixed gear racks 5-9, the sliding shaft 6-1 rotates, the rotation generated by the sliding shaft 6-1 is transmitted to the transmission belt wheel II 6-6 through the transmission belt wheel I6-4, the distance between the transmission belt wheel I6-4 and the rotating shaft 6-5 is kept constant through the connecting rod 6-16, when the sliding shaft 6-1 moves, the connecting rod 6-16 drives the rotating shaft 6-5, the rotating shaft 6-5 drives the supporting rod 6-17 to slide in the supporting trapezoidal groove 5-11, the supporting rod 6-17 plays a supporting role for the rotating shaft 6-5 and can move along with the movement of the rotating shaft 6-5, so that the sliding shaft 6-1 can be driven by the movable rocker arm I5-6 to move and rotate the sliding shaft 6-1, the rotating shaft 6-5 is driven by the sliding shaft 6-1 through the supporting rod 6-17 to move, the distance between the sliding shaft 6-1 and the rotating shaft 6-5 is fixed, and the transmission belt pulley I6-4 on the sliding shaft 6-1 can drive the transmission belt pulley II 6-6 to rotate through belt transmission; the transmission belt wheel II 6-6 drives the gear 6-7 to rotate through the rotating shaft 6-5, the gear 6-7 drives the transmission rack 6-8 through meshing transmission with the transmission rack 6-8, two ends of the transmission rack 6-8 are fixedly connected with rack frames 6-9, the rack frames 6-9 support the transmission rack 6-8, the guide sliders 6-10 at the bottom ends of the two rack frames 6-9 slide in the support trapezoidal grooves 5-11, the transmission rack 6-8 can slide in the support trapezoidal grooves 5-11 through the guide sliders 6-10 and the rack frames 6-9, when the gear 6-7 rotates, the transmission rack 6-8 is pushed through meshing, the transmission rack 6-8 drives the guide sliders 6-10 to slide in the support trapezoidal grooves 5-11 through the rack frames 6-9, the rack 6-9 drives the brush head bracket 6-11 to move, the front end of the brush head bracket 6-11 and the sliding bracket 6-13 slide in the brush head bracket groove 5-3, the sliding bracket 6-13 is designed into a square shape and can not rotate in the brush head bracket groove 5-3, so as to ensure that the brush head 6-14 on the sliding bracket 6-13 is always vertical to the blackboard body 1-1, the driving belt wheel I6-4 is provided with a bearing hole, the other end of the connecting rod 6-16 is provided with a fulcrum shaft, the fulcrum shaft of the connecting rod 6-16 is connected in the bearing hole of the driving belt wheel I6-4 in a rotating fit way through a belt seat bearing, the connecting shaft 6-12 is provided with a bearing hole, the fulcrum shaft on the sliding bracket 6-13 is connected in the bearing hole of the connecting shaft 6, the connecting shaft 6-12 is fixedly connected to the gasket 6-2, so that the sliding shaft 6-1 can drive the sliding support 6-13 to slide in the brush head support groove 5-3, but the sliding support 6-13 does not rotate along with the sliding shaft 6-1, the brush head 6-14 is arranged on the brush head support 6-11 and the sliding support 6-13, chalk 6-15 is arranged in the brush head 6-14, the connecting plate I4-1 applies thrust to the support plate 5-1 towards the blackboard body 1-1 through the compression spring 4-5, the brush head support groove 5-3 on the support plate 5-1 drives the brush head support 6-11 and the sliding support 6-13, and finally the brush head support 6-11 and the sliding support 6-13 drive the chalk 6-15 on the brush head 6-14, enabling the chalks 6-15 to be pressed against the blackboard body 1-1, enabling the chalks 6-15 to draw lines on the blackboard by sliding the linkage brush base 5 through the transverse sliding device 2 and the longitudinal sliding device 3, and enabling the rocker arms II 5-7 to drive the upper linkage brush 6 to have the same principle as that of the lower linkage brush 6 driven by the rocker arms I5-6; the lengths of the rocker arms I5-6 and the rocker arms II 5-7 are equal, so that when the handle 5-5 is moved, the rocker arms I5-6 and the rocker arms II 5-7 respectively drive the two sliding shafts 6-1 to move for the same distance; because the diameter of the outer ring of the transmission belt wheel I6-4 is twice that of the outer ring of the transmission belt wheel II 6-6, the number of teeth and the modulus of the outer gear ring 6-3 and the gear 6-7 are the same, and the size of the transmission rack 6-8 and the fixed rack 5-9 is the same, when the rotation of the outer gear ring 6-3 is transmitted to the transmission belt wheel II 6-6 through the transmission belt wheel I6-4, and the transmission belt wheel II 6-6 drives the gear 6-7 to rotate, the transmission ratio of the outer gear ring 6-3 and the gear 6-7 is one to two; when the sliding shaft 6-1 moves, the external gear ring 6-3 can be rotated by the meshing of the external gear ring 6-3 and the fixed rack 5-9, when the transmission ratio of the external gear ring 6-3 to the gear 6-7 is one to two, the transmission rack 6-8 and the fixed rack 5-9 have the same size, so that the gear 6-7 can push out the transmission rack 6-8 twice as long as the sliding shaft 6-1 moves, because the sliding shaft 6-1 drives the rotating shaft 6-5 to move, the gear 6-7 also follows the movement of the external gear ring 6-3 when moving, and the gear 6-7 pushes the transmission rack 6-8 out of the sliding shaft 6-1 twice as long as the movement of the sliding shaft 6-1, so that the transmission rack 6-8 drives the rotating shaft 6-5 to move by the sliding shaft 6-1 and follows the sliding shaft 6-1 to move for the same distance as the sliding shaft 6-1 The distance pushed out by the transmission racks 6-8 is added by the gears 6-7 to be three times of the distance moved by the sliding shaft 6-1, so that each time the sliding shaft 6-1 moves one end, the distance moved by the transmission racks 6-8 is three times of the distance moved by the sliding shaft 6-1, when in actual use, the position of the handle 5-5 is pulled, the handle 5-5 drives the rocker arm I5-6 and the rocker arm II 5-7 through hinging, the rocker arm I5-6 and the rocker arm II 5-7 drive the two sliding shafts 6-1 to move in opposite directions in equal amount, the brush heads 6-14 on the two sliding brackets 6-13 move relatively, so that when the single sliding shaft 6-1 moves for a certain distance, the distance changed between the brush heads 6-14 on the two sliding brackets 6-13 is twice of the distance moved by the sliding shaft 6-1, the two brush heads 6-14 on the same linkage brush 6 move in the same direction, so the distance of each brush head 6-14 can be kept constant only by the transmission rack 6-8 driving the brush heads 6-14 on the brush head bracket 6-11 to move three times of the distance moved by the adjacent sliding shaft 6-1, thereby realizing the adjustment of the distance between the brush heads 6-14 to adjust the drawn line width and keeping the line width uniform. The lines drawn by the brush heads 6-14 are chalk lines which can be erased by a blackboard eraser.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.
Claims (4)
1. The utility model provides a conveniently write english teaching blackboard of english word, includes blackboard (1), lateral sliding device (2), longitudinal sliding device (3), closing device (4), linkage brush base (5) and linkage brush (6), its characterized in that: the blackboard (1) comprises a blackboard body (1-1), a transverse sliding rod I (1-2), a transverse sliding rod II (1-3) and blackboard supports (1-4), the transverse sliding rod II (1-3) and the transverse sliding rod I (1-2) are respectively and fixedly connected to the upper end and the lower end of the blackboard body (1-1), two blackboard supports (1-4) are arranged, and the two blackboard supports (1-4) are respectively and fixedly connected to the two ends of the rear end of the blackboard body (1-1);
the transverse sliding device (2) comprises a transverse sliding block I (2-1), a transverse sliding block II (2-2) and longitudinal sliding rods (2-3), the number of the longitudinal sliding rods (2-3) is two, two ends of the two longitudinal sliding rods (2-3) are fixedly connected to two ends of the inner sides of the transverse sliding block II (2-2) and the transverse sliding block I (2-1) respectively, the transverse sliding block I (2-1) is connected to the transverse sliding rod I (1-2) in a sliding fit mode, and the transverse sliding block II (2-2) is connected to the transverse sliding rod II (1-3) in a sliding fit mode;
the longitudinal sliding device (3) comprises a longitudinal sliding block (3-1), a door-shaped clamping shaft (3-2), a screw rod seat (3-3), a rotating screw rod (3-4), a crank (3-5) and a longitudinal sliding hole (3-6), the door-shaped clamping shaft (3-2) is connected in the longitudinal sliding block (3-1) in a sliding fit manner, the screw rod seat (3-3) is fixedly connected on the longitudinal sliding block (3-1), one end of the rotating screw rod (3-4) is fixedly connected with the crank (3-5), the other end of the rotating screw rod (3-4) is connected in the screw rod seat (3-3) in a rotating fit manner, the front end of the rotating screw rod (3-4) is connected in the door-shaped clamping shaft (3-2) through threads, two longitudinal sliding holes (3-6) are arranged, the two longitudinal sliding holes (3-6) are respectively arranged at two ends of the longitudinal sliding block (3-1), the two longitudinal sliding holes (3-6) penetrate through the longitudinal sliding block (3-1), the rear end of the door-shaped clamping shaft (3-2) is respectively inserted into the two longitudinal sliding holes (3-6), and the two longitudinal sliding holes (3-6) are respectively connected to the two longitudinal sliding rods (2-3) in a sliding fit manner;
the pressing device (4) comprises a connecting plate I (4-1), a connecting plate II (4-2), two limiting columns (4-3), two spring columns (4-4) and compression springs (4-5), one ends of the two limiting columns (4-3) are fixedly connected to the two ends of the connecting plate I (4-1) respectively, the other ends of the two limiting columns (4-3) are connected to the two ends of the connecting plate II (4-2) in a sliding fit mode respectively, one end of each spring column (4-4) is fixedly connected to the middle end of the connecting plate I (4-1), the other end of each spring column (4-4) is connected to the middle end of the connecting plate II (4-2) in a sliding fit mode, one end of the connecting plate II (4-2) is fixedly connected to the longitudinal sliding block (3-1), the other end of the connecting plate I (4-1) is fixedly connected to a linkage brush base (5), a compression spring (4-5) is arranged on the spring column (4-4), and the compression spring (4-5) is arranged between the connecting plate I (4-1) and the connecting plate II (4-2);
the linkage brush base (5) comprises a supporting plate (5-1), a rotating shaft sliding groove (5-2), a brush head support groove (5-3), an adjusting support rod (5-4), a handle (5-5), a rocker arm I (5-6), a rocker arm II (5-7), a fastening screw rod (5-8), a fixing rack (5-9), a guide trapezoidal groove (5-10) and a supporting trapezoidal groove (5-11), wherein the middle end of the supporting plate (5-1) is fixedly connected with the rotating shaft sliding groove (5-2), the brush head support groove (5-3) is fixedly connected with one end of the supporting plate (5-1), the other end of the supporting plate (5-1) is provided with the supporting trapezoidal groove (5-11), the middle end of the supporting plate (5-1) is fixedly connected with the adjusting support rod (5-4), the adjusting support rod (5-4) is arranged between the rotating shaft sliding groove (5-2) and the supporting trapezoid groove (5-11), the handle (5-5) is connected to the adjusting support rod (5-4) in a sliding fit mode, the handle (5-5) is perpendicular to the supporting plate (5-1), the front ends (5-7) of the rocker arm I (5-6) and the rocker arm II are hinged to the handle (5-5), the fastening screw rod (5-8) is connected into the adjusting support rod (5-4) through threads, the inner side of the fastening screw rod (5-8) is abutted to the handle (5-5), the supporting plate (5-1) is fixedly connected with two fixed racks (5-9), the inner sides of the two fixed racks (5-9) are respectively attached to two sides of the rotating shaft sliding groove (5-2), the supporting plate (5-1) is provided with two guiding trapezoid grooves (5-10), two guiding trapezoidal grooves (5-10) are respectively arranged at two ends of the adjusting support rod (5-4), the distances between the two trapezoidal grooves (5-10) and the rotating shaft sliding groove (5-2) are equal, and one end of the support plate (5-1) provided with a support trapezoidal groove (5-11) is fixedly connected to the connecting plate I (4-1);
the linkage brush (6) comprises a sliding shaft (6-1), a gasket (6-2), an outer gear ring (6-3), a driving belt wheel I (6-4), a rotating shaft (6-5), a driving belt wheel II (6-6), a gear (6-7), a driving rack (6-8), a rack frame (6-9), a guide slider (6-10), a brush head bracket (6-11), a connecting shaft (6-12), a sliding bracket (6-13), a brush head (6-14), chalk (6-15), a connecting rod (6-16) and a supporting rod (6-17), wherein one end of the sliding shaft (6-1) is fixedly connected to one end of the gasket (6-2), the connecting shaft (6-12) is fixedly connected to the other end of the gasket (6-2), the other end of the sliding shaft (6-1) is fixedly connected with a driving belt wheel I (6-4), two outer gear rings (6-3) are arranged, the two outer gear rings (6-3) are fixedly connected to the sliding shaft (6-1), the two outer gear rings (6-3) are arranged between the gasket (6-2) and the driving belt wheel I (6-4), the driving belt wheel II (6-6) is fixedly connected to one end of the rotating shaft (6-5), the gear (6-7) is fixedly connected to the other end of the rotating shaft (6-5), the driving belt wheel I (6-4) is connected with the driving belt wheel II (6-6) in a belt transmission fit manner, one ends of two rack brackets (6-9) are respectively and fixedly connected to two ends of a driving rack (6-8), and the gear (6-7) is in meshing transmission with the driving rack (6-8), the other ends of the two rack supports (6-9) are respectively fixedly connected with the two ends of the guide sliding block (6-10), one end of the brush head support (6-11) is fixedly connected with the rack support (6-9) at the outer side, two brush heads (6-14) are arranged, one chalk (6-15) is connected in the two brush heads (6-14) in an interference fit manner, one brush head (6-14) is fixedly connected with the other end of the brush head support (6-11), the other brush head (6-14) is fixedly connected with one end of the sliding support (6-13), the other end of the sliding support (6-13) is provided with a fulcrum shaft, the sliding support (6-13) is connected in the connecting shaft (6-12) in a rotating fit manner through the fulcrum shaft, the rotating shaft (6-5) is connected at one end of the connecting rod (6, the connecting rods (6-16) are arranged between the transmission belt wheels II (6-6) and the gears (6-7), the other ends of the connecting rods (6-16) are provided with fulcrum shafts, the connecting rods (6-16) are connected to the transmission belt wheels I (6-4) in a rotating fit mode through the fulcrum shafts, and the outer ends of the rotating shafts (6-5) are connected to the supporting rods (6-17) in a rotating fit mode;
a sliding shaft (6-1) is connected in a sliding fit manner in a rotating shaft sliding groove (5-2), two outer gear rings (6-3) are respectively meshed with fixed racks (5-9) on two sides of the rotating shaft sliding groove (5-2) for transmission, a guide sliding block (6-10) is connected in a guide trapezoidal groove (5-10) at one end in a sliding fit manner, a brush head support (6-11) is connected in a brush head support groove (5-3) in a sliding fit manner, a sliding support (6-13) is connected in a brush head support groove (5-3) in a sliding fit manner, the brush head support (6-11) is positioned outside the sliding support (6-13) in the brush head support groove (5-3), and the bottom end of a support rod (6-17) is connected in the support trapezoidal groove (5-11) in a sliding fit manner;
the two linkage brushes (6) are symmetrically arranged on a linkage brush base (5), a sliding shaft (6-1) of the linkage brush (6) positioned below is connected to the rear end of the rocker arm I (5-6) in a rotating fit mode, the rocker arm I (5-6) is arranged between a gasket (6-2) of the linkage brush (6) positioned below and an outer gear ring (6-3) close to the gasket (6-2), the sliding shaft (6-1) of the linkage brush (6) positioned above is connected to the rear end of the rocker arm II (5-7) in a rotating fit mode, the rocker arm II (5-7) is arranged between the gasket (6-2) of the linkage brush (6) positioned above and the outer gear ring (6-3) close to the gasket (6-2), the diameter of the outer ring of the driving belt wheel I (6-4) is twice the diameter of the driving belt wheel II (6-6), the number of teeth and the modulus of the outer gear ring (6-3) and the gear (6-7) are the same.
2. The english teaching blackboard convenient for writing english words according to claim 1, characterized in that: the lengths of the rocker arms I (5-6) and the rocker arms II (5-7) are equal.
3. The english teaching blackboard convenient for writing english words according to claim 2, characterized in that: the transmission rack (6-8) and the fixed rack (5-9) have the same size.
4. The English teaching blackboard convenient for writing English words according to claim 3, characterized in that: the rotating shaft sliding groove (5-2), the brush head support groove (5-3), the fixed rack (5-9), the guide trapezoidal groove (5-10) and the support trapezoidal groove (5-11) are all parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810887045.3A CN108973455B (en) | 2018-08-06 | 2018-08-06 | English teaching blackboard convenient for writing English words |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810887045.3A CN108973455B (en) | 2018-08-06 | 2018-08-06 | English teaching blackboard convenient for writing English words |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108973455A CN108973455A (en) | 2018-12-11 |
| CN108973455B true CN108973455B (en) | 2020-06-16 |
Family
ID=64555196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN109367298A (en) * | 2018-12-19 | 2019-02-22 | 福建工程学院 | A kind of automatic eraser device |
| CN110091649B (en) * | 2019-02-23 | 2024-02-09 | 重庆工业职业技术学院 | Vertical layout auxiliary copying device structure |
| CN110481206A (en) * | 2019-08-26 | 2019-11-22 | 商丘医学高等专科学校 | A kind of auxiliary device convenient for writing English word |
| CN112440604B (en) * | 2020-11-24 | 2024-09-10 | 濮阳职业技术学院 | English teaching auxiliary system |
| CN112477482A (en) * | 2020-12-04 | 2021-03-12 | 李梓菏 | Multi-functional teaching aid for village teaching |
| CN112365775B (en) * | 2020-12-23 | 2022-09-09 | 佛山市天诚工程造价咨询有限公司 | Convenient statistical chart demonstration teaching board who adjusts |
| CN113500869B (en) * | 2021-07-09 | 2022-11-18 | 邵庆芬 | Efficient taste teaching aid of medical science english teaching usefulness |
| CN114919313A (en) * | 2022-04-05 | 2022-08-19 | 三峡大学 | Device and method for generating man-machine interaction font and writing characters |
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| CN108973455A (en) | 2018-12-11 |
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