CN211808732U

CN211808732U - Blackboard eraser for teaching

Info

Publication number: CN211808732U
Application number: CN201821487979.XU
Authority: CN
Inventors: 赵紫莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-12
Filing date: 2018-09-12
Publication date: 2020-10-30
Anticipated expiration: 2028-09-12

Abstract

The utility model relates to a blackboard eraser for teaching, which comprises an eraser shell and a holding support rod arranged at the lower part of the eraser shell, wherein the holding support rod is rotatably connected with the lower part of the eraser shell through a lockable universal shaft; the blackboard eraser comprises a blackboard eraser shell, a dust absorption shell and a transmission shell, wherein the left side and the right side of the blackboard eraser shell are respectively provided with the dust absorption shell and the transmission shell, a dust absorption part is arranged in the dust absorption shell, two transversely arranged hollow rollers are symmetrically arranged in the opening end of the blackboard eraser shell from top to bottom, a cleaning part is arranged on the periphery of each hollow roller, two ends of each hollow roller are respectively and fixedly connected with a hollow shaft along the central axis direction of the hollow roller, a dust absorption pipe is arranged in the middle of each hollow roller along the central axis direction of the hollow roller. The utility model discloses be convenient for adjust sponge layer, felt strip, brush hair strip used in turn, be applicable to and use under different situation, improve and erase efficiency, improve the practicality of using, and can reduce the dust and fly upward, be convenient for weather the blackboard water stain.

Description

Blackboard eraser for teaching

Technical Field

The utility model belongs to the technical field of the teaching equipment, especially, relate to a blackboard eraser is used in teaching.

Background

At present, in the teaching of various primary schools, schools and schools, a blackboard is an indispensable teaching tool, and the blackboard and chalk are still widely used in teaching places. In the using process, the blackboard needs a person to use a blackboard brush to brush off chalk characters written on the blackboard for reuse, when the blackboard is brushed by the blackboard brush, part of dust generated is adsorbed on hands and clothes of the person who brushes the blackboard, and the other part of dust flies in the air. The hair and body of a person who wipes the blackboard are all dust, and the air in a classroom is also full of dust. The dust of the chalk brings adverse effects to the health of teachers and students and threatens the physical health of the teachers and students.

Chinese patent CN207088804U discloses a hand-held automatic dust-absorbing blackboard eraser, which comprises a body and an eraser head detachably arranged at an opening on the right end face of the body; the body is divided into a left dust collecting cavity and a left air inducing cavity by a partition plate, and the wiping head consists of a brush seat and a brush which are integrally formed; a plurality of air inlets are uniformly arranged on the brush seat, the dust collecting cavity is communicated with the air inducing cavity through a filter screen arranged on the partition plate, and a plurality of electrostatic dust collecting plates are vertically arranged between the filter screen and the brush seat; an induced draft fan is arranged in the induced draft cavity, and a plurality of air outlets are formed in both ends of the induced draft cavity; the left side wall of the body is provided with a telescopic rod. However, the conventional blackboard eraser has the disadvantages of poor erasing efficiency, single erasing mode, unadjustable angle, poor practicability and the like.

Therefore, based on the problems, the blackboard eraser for teaching is convenient to adjust the sponge layer, the felt strips and the brush hair strips for alternate use, is suitable for being used under different situations, improves the erasing efficiency, improves the practicability of use, can reduce dust flying, is convenient to blow dry water stains on the blackboard, and has important practical significance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide one kind and be convenient for adjust sponge layer, felt strip, brush hair strip used in turn, be applicable to and use under different situation, improve and erase efficiency, improve the practicality of using, and can reduce the dust and fly upward, be convenient for carry out the teaching blackboard eraser that weathers to blackboard water stain.

The utility model discloses take following technical scheme to realize:

a blackboard eraser for teaching comprises an eraser shell and a holding support rod arranged at the lower part of the eraser shell, wherein the holding support rod is of a telescopic rod structure, the holding support rod is rotatably connected with the lower part of the eraser shell through a lockable universal shaft, and the eraser shell is of a shell structure with an opening at the front end;

the blackboard eraser is characterized in that the left side and the right side of the blackboard eraser shell are respectively provided with an ash sucking shell and a transmission shell, an ash sucking component is arranged in the ash sucking shell, the ash sucking component comprises a micro dust collector and an ash sucking header pipe, two transversely arranged hollow rollers are symmetrically arranged in the open end of the blackboard eraser shell up and down, a cleaning component is arranged on the periphery of each hollow roller, a cylindrical hollow cavity is arranged inside each hollow roller, the two ends of each hollow roller are respectively and fixedly connected with a hollow shaft along the central axis direction of the hollow roller, one end, close to each hollow roller, of each hollow shaft extends into the corresponding hollow cavity, one end, far away from each hollow roller, of each hollow shaft is rotatably connected with the blackboard eraser shell through a bearing, the hollow shaft close to one side of the transmission shell extends into the transmission shell and is provided with a driven sprocket on the outer wall, the middle part in each hollow roller is provided with an ash sucking pipe along the central axis direction of the hollow roller, the transmission shell is internally provided with a transmission part for driving two hollow rollers to rotate reversely, the transmission part comprises a driving chain wheel and a transmission chain ring, and the driving chain wheel is in transmission connection with a driven chain wheel through the transmission chain ring.

Preferably, the one end that the ash suction pipe is close to the transmission casing is the blind end and passes the inner wall looks rigid coupling of hollow shaft and transmission casing, the one end that the ash suction pipe is close to the ash suction casing is the open end and passes the hollow shaft and stretch into in the ash suction casing and link to each other with the ash suction house steward, the output of ash suction house steward links to each other with the input of miniature dust catcher, the output and the dust storage box of miniature dust catcher are linked together, be equipped with the filter screen in the dust storage box, the output of dust storage box links to each other with the one end of exhaust pipe, the other end of exhaust pipe stretches out beyond the ash suction casing through the diapire of ash suction casing.

Preferably, two ends of a wheel shaft in the middle of the driving sprocket are respectively rotatably connected with the blackboard eraser shell and the side wall of the transmission shell, the driving sprocket is in transmission connection with the driven sprocket through a transmission chain ring, the driving sprocket is located on the inner side of the transmission chain ring, the two driven sprockets are respectively located on the inner side and the outer side of the transmission chain ring, the driving sprocket and the driven sprocket are respectively meshed with the transmission chain ring, one end of the wheel shaft of the driving sprocket extends out of the transmission shell and is connected with the transmission gear, and a stop component for controlling the driving sprocket to stop is arranged above the transmission gear.

Further preferably, the locking part includes a stop block, locking box body, one side that the stop block is close to drive gear is the cambered surface shape of indent, the stop block is close to drive gear's one side sculpture and is equipped with the insection, the insection meshes with drive gear mutually, one side rigid coupling that drive gear was kept away from to the stop block has a stop lever, the stop lever runs through the locking box body and links to each other with the pulling ring, one side that the locking box body is close to drive housing and drive housing rigid coupling, the inside hollow structure that is of locking box body, and the opening that supplies the stop lever to pass is seted up respectively to both sides, the rigid coupling has a limiting plate on the part that the stop lever is located the locking box body, the cover is equipped with a expanding spring on the stop lever between limiting plate and the locking box body, expanding spring is located.

Preferably, the cleaning component includes sponge layer, many felt strip, many brush hair strip, the periphery of well hollow roller evenly divides into wet district, felt dry district, brush hair dry district along its circumferencial direction, install the sponge layer in the well hollow roller periphery of wet district department of wiping, evenly install many felt strip along the circumferencial direction in the well hollow roller periphery of felt dry district department of wiping, evenly be equipped with many brush hair strip along the circumferencial direction in the well hollow roller periphery of brush hair dry district department of wiping, felt strip, brush hair strip are installed along well hollow roller axial direction respectively, and are adjacent evenly seted up a plurality of through-holes along axial direction on the well hollow roller between the felt strip, and are adjacent evenly seted up a plurality of through-holes along axial direction on the well hollow roller between the brush hair strip.

Preferably, a squeezing block is arranged behind the two adjacent hollow rollers, one side of the squeezing block, which is close to the hollow rollers, is in an arc shape matched with the hollow rollers, and a driving part for driving the squeezing block to move back and forth is arranged behind the squeezing block.

Preferably, the driving part comprises a rotating rod vertically arranged in the middle of the blackboard eraser shell and rotatably connected with the blackboard eraser shell, the lower end of the rotating rod extends out of the blackboard eraser shell and is connected with the rotating wheel, two sections of thread sections with opposite rotation directions are symmetrically arranged on the rotating rod, a thread seat is respectively screwed on the two thread sections, a connecting rod is hinged to one side of the thread seat close to the extrusion block, the other end of the connecting rod is respectively hinged to the middle of the extrusion block, a slide bar is vertically arranged in the blackboard eraser shell behind the rotating rod, and a sliding groove in sliding connection with the slide bar is arranged at one end of the thread seat close to the slide bar.

Preferably, the left side and the right side of the extrusion block are respectively provided with a sliding block, the side wall of the blackboard eraser shell close to the sliding block is vertically provided with a sliding rail, and the sliding block can freely slide in the sliding rail.

Preferably, the blackboard eraser is further provided with a blowing shell, the blowing shell is arranged at the upper end of the blackboard eraser shell, a blowing pipe is arranged in the blowing shell along the length direction of the blowing pipe, blowing nozzles are evenly arranged at the front end of the blowing pipe along the axial direction of the blowing pipe, a micro air blower is arranged behind the blowing pipe, the micro air blower is fixedly connected in the blowing shell, the two ends of the blowing pipe are closed ends, and the input end of the blowing pipe is communicated with the output end of the micro air blower.

Preferably, the holding support rod comprises a telescopic inner tube, two ends of the telescopic inner tube are arranged in the telescopic outer tube in a telescopic mode, and the telescopic outer tube and the telescopic inner tube are locked through a locking sleeve.

The utility model has the advantages that:

1. the utility model discloses in, can adjust the angle of gripping between bracing piece and the blackboard eraser casing according to actual demand, grip the bracing piece and be telescopic rod structure, thereby adjustable whole length who grips the bracing piece is applicable to and cleans the not chalk seal of a government organization in old china of co-altitude, for teacher and student create convenient, labour saving and time saving, convenient and fast erases the efficiency and is showing the improvement.

2. The utility model discloses in, the dust absorption mouth on the dust absorption pipe is towards the place ahead all the time, when opening miniature dust catcher, and the dust that cleans falls loops through the through-hole on the cavity roller, inhales grey mouth, dust absorption pipe, miniature dust catcher and enters into the dust storage box to reach the purpose of collecting the dust, can prevent effectively that the dust from flying upward, reduce the harm of dust to user's health, protection student and teacher's health, and the whole occupation space of effectual reduction of dust absorption pipe assembly in the cavity roller.

3. The utility model discloses in, can not take place to rotate when locking through the steerable driving gear position of locking part, make the cavity roller can't be at blackboard eraser casing internal rotation, then make to clean the chalk seal of a mark towards the cleaning element in the blackboard eraser casing outside, when carrying out the unblock to the driving gear position through locking part, clean the chalk seal of a mark on the blackboard through rotating the cleaning element on the different sides of adjustable cavity roller of driving gear, the cleaning element that is favorable to each position obtains make full use of, wearing and tearing are even, prolong cleaning element's life greatly.

4. The utility model discloses in, through rotating adjustable sponge layer of drive gear, felt strip, brush hair strip in turn towards the blackboard eraser casing outside, the sponge layer can be wiped the blackboard after wetting, and is clean efficient, and felt strip, brush hair strip can be cleaned the chalk seal of a government organization in old china on the blackboard, are applicable to and use under different situation, improve the practicality of using.

5. The utility model discloses in, can drive the extrusion piece back-and-forth movement through drive assembly, the extrusion piece can extrude and extrude the moisture that exists in the sponge layer to the sponge layer, prevents that too much influence of moisture from cleaning the effect.

6. The utility model discloses in, can blast air to in the blast pipe through miniature air-blower, outwards blast air through the blowing nozzle then, after the blackboard was drenched, accessible blowing nozzle blast air to the blackboard helps weather the water stain on the blackboard, helps writing on the blackboard once more.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the overall structure of the eraser housing, the dust-absorbing housing and the transmission housing in FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 taken along line A-A;

FIG. 4 is a schematic view of the hollow roller of FIG. 3;

FIG. 5 is a schematic view of the structure of FIG. 2 taken along the line B-B;

FIG. 6 is a schematic view of the structure of FIG. 2 taken along the line C-C;

FIG. 7 is a schematic top view of the structure of FIG. 2 taken along line D-D;

FIG. 8 is a schematic view of the longitudinal cross-sectional structure of FIG. 1;

FIG. 9 is a schematic longitudinal sectional view of the stop member and the transmission gear;

FIG. 10 is a schematic diagram of the right side view of the structure of FIG. 9;

fig. 11 is a schematic structural view of another embodiment.

In the figure: 1. the dust cleaning machine comprises a blackboard eraser shell, a universal shaft, a dust suction shell, a transmission shell, a miniature dust collector, a dust suction main pipe, a hollow roller, a hollow shaft, a driven chain wheel, a dust suction pipe, a dust suction nozzle, a driving chain wheel, a driving chain ring, a transmission chain ring, a dust storage box, a filter screen, a dust exhaust pipe, a transmission gear, a stop block, a gear pattern, a stop rod, a pull ring, a limiting plate, a telescopic spring, a sponge layer, a felt strip, a brush wool strip, a stop box body, a telescopic inner pipe, a telescopic outer pipe, a through hole, a squeezing block, a rotating rod, a rotating wheel, a threaded seat, a connecting rod, a sliding strip, a sliding block, a sliding rail, a blowing pipe, a blowing nozzle, 43. And a locking sleeve.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1-10, a blackboard eraser for teaching comprises an eraser housing 1 and a holding support rod disposed at the lower part of the eraser housing 1, wherein the holding support rod is a telescopic rod structure, the holding support rod is rotatably connected with the lower part of the eraser housing 1 through a lockable universal shaft 2, and the eraser housing 1 is a housing structure with an opening at the front end; the blackboard eraser comprises a blackboard eraser shell 1, wherein the left side and the right side of the blackboard eraser shell 1 are respectively provided with an ash sucking shell 3 and a transmission shell 4, an ash sucking component is arranged in the ash sucking shell 3 and comprises a micro dust collector 5 and an ash sucking header pipe 6, two transversely arranged hollow rollers 7 are symmetrically arranged in the opening end of the blackboard eraser shell 1 from top to bottom, a cleaning component is arranged at the periphery of each hollow roller 7, a cylindrical hollow cavity is arranged inside each hollow roller 7, the two ends of each hollow roller 7 are respectively and fixedly connected with a hollow shaft 8 along the axial direction thereof, one end of each hollow shaft 8, which is close to each hollow roller 7, extends into the hollow cavity, one end of each hollow shaft 8, which is far away from each hollow roller 7, is rotatably connected with the blackboard eraser shell 1 through a bearing, a driven sprocket 9 is arranged in the transmission shell 4 and on the outer wall of the hollow shaft 8, which is close to one side of the transmission shell 1, and an ash sucking pipe 10 is, the front end of the dust suction pipe 10 is evenly provided with a dust suction nozzle 11 along the axial direction thereof, a transmission part for driving two hollow rollers 7 to rotate reversely is arranged in the transmission shell 4, the transmission part comprises a driving chain wheel 12 and a transmission chain ring 13, and the driving chain wheel 12 is in transmission connection with the driven chain wheel 9 through the transmission chain ring 13.

Example (b): the holding support rod is rotatably connected with the lower part of the blackboard eraser shell 1 through a lockable universal shaft 2, the angle between the holding support rod and the blackboard eraser shell 1 can be adjusted according to actual requirements, the holding support rod is of a telescopic rod structure, the whole length of the holding support rod can be adjusted, and therefore the blackboard eraser is suitable for wiping chalk marks with different heights, convenience, time saving, labor saving, convenience and rapidness are created for teachers and students, the erasing efficiency is obviously improved, two transversely arranged hollow rollers 7 are symmetrically arranged in the open end of the blackboard eraser shell 1 from top to bottom, cleaning parts are arranged on the peripheries of the hollow rollers 7, the cleaning parts can be, but not limited to felts, sponges or brush hairs, and can be used for wiping the chalk marks on a; the hollow roller 7 can rotate in the blackboard eraser shell 1 through the hollow shafts 8 at two sides, the right side of the blackboard eraser shell 1 is provided with the transmission shell 4, the transmission shell 4 is internally provided with a transmission part for driving the two hollow rollers 7 to rotate reversely, the transmission part comprises a driving sprocket 12 and a transmission chain ring 13, the hollow shaft 8 at one side close to the transmission shell 1 extends into the transmission shell 4 and is provided with a driven sprocket 9 on the outer wall, the driving sprocket 12 is connected with the driven sprocket 9 through the transmission chain ring 13 in a transmission way, the hollow rollers 7 can be driven to rotate through the transmission part, therefore, different side surfaces of the hollow roller 7 are adjusted to face the outer side of the blackboard eraser shell 1, so that the cleaning parts on the different side surfaces of the hollow roller 7 are adjusted to wipe chalk marks on the blackboard, the cleaning parts at all positions are fully utilized, the abrasion is uniform, and the service life of the cleaning parts is greatly prolonged; the blackboard eraser comprises a blackboard eraser shell 1, wherein an ash sucking shell 3 is arranged on the left side of the blackboard eraser shell 1, an ash sucking part is arranged in the ash sucking shell 3 and comprises a miniature dust collector 5 and an ash sucking main pipe 6, an ash sucking pipe 10 is arranged in the middle of the hollow roller 7 along the central axis direction of the hollow roller, one end of the ash sucking pipe 10 close to a transmission shell 4 is a closed end and penetrates through a hollow shaft 8 to be fixedly connected with the inner wall of the transmission shell 4, one end of the ash sucking pipe 10 close to the ash sucking shell 3 is an open end and penetrates through the hollow shaft 8 to extend into the ash sucking shell 3 to be connected with the ash sucking main pipe 6, and the front end of the ash sucking pipe 10 is uniformly provided with ash sucking nozzles 11 along the axial direction, so that when the hollow roller 7 rotates, the position of the ash sucking pipe 10 is not influenced and remains still, the ash sucking nozzles 11 on the ash sucking pipe 10 always face the front, and when the miniature dust collector 5 is opened, the cleaned dust, The miniature dust collector 5 enters the dust storage box 14 to achieve the purpose of collecting dust, the dust can be effectively prevented from flying, the harm of the dust to the body of a user is reduced, the health of students and teachers is protected, and the dust suction pipe 10 can be assembled in the hollow roller 7 to effectively reduce the whole occupied space.

Still further, can be in the utility model discloses in consider, the one end that the suction pipe 10 is close to transmission housing 4 is the blind end and passes hollow shaft 8 and transmission housing 4's inner wall looks rigid coupling, the one end that is close to suction housing 3 of suction pipe 10 is the open end and passes hollow shaft 8 and stretch into in the suction housing 3 and link to each other with suction manifold 6, suction manifold 6's output links to each other with miniature dust catcher 5's input, miniature dust catcher 5's output and dust storage box 14 are linked together, be equipped with filter screen 15 in the dust storage box 14, the output of dust storage box 14 links to each other with the one end of exhaust pipe 16, the other end of exhaust pipe 16 stretches out beyond the suction housing 3 through the diapire of suction housing 3.

A dust suction pipe 10 is arranged in the middle of the hollow roller 7 along the central axis direction thereof, one end of the dust suction pipe 10 close to the transmission shell 4 is a closed end and penetrates through the hollow shaft 8 to be fixedly connected with the inner wall of the transmission shell 4, one end of the dust suction pipe 10 close to the dust suction shell 3 is an open end and penetrates through the hollow shaft 8 to extend into the dust suction shell 3 to be connected with a dust suction main pipe 6, so that the position of the dust suction pipe 10 is fixed, dust suction nozzles 11 are uniformly arranged at the front end of the dust suction pipe 10 along the axial direction thereof, when the hollow roller 7 rotates, the position of the dust suction pipe 10 is not affected and remains still, the dust suction nozzle 11 on the dust suction pipe 10 always faces forward, when the micro dust collector 5 is started, the cleaned dust sequentially passes through the through hole on the hollow roller 7, the dust suction nozzle 11, the dust suction pipe 10 and the micro dust collector 5 to enter the dust storage box 14, the dust passes through the interception filter screen 15 and is discharged through the exhaust pipe 16, the dust of collection is stored in dust storage box 14 to reach the purpose of collecting the dust, can prevent effectively that the dust from flying upward, reduce the harm of dust to user's health, protect student and teacher's health, can empty it with the dust in the dust storage box 14 at intervals.

Still further, can also be in the utility model discloses in consider, the both ends of the shaft at the middle part of driving sprocket 12 rotate with the lateral wall of blackboard eraser casing 1, transmission casing 4 respectively and are connected, driving sprocket 12 is connected with the transmission of driven sprocket 9 through drive chain circle 13, driving sprocket 12 is located the inboard of drive chain circle 13, two driven sprocket 9 is located the inside and outside both sides of drive chain circle 13 respectively, just driving sprocket 12, driven sprocket 9 mesh with drive chain circle 13 respectively, the one end of the shaft of driving sprocket 12 is stretched out and is linked to each other with drive gear 17 outside transmission casing 4, the top of drive gear 17 is equipped with the locking part of its locking of a control.

The position of the transmission gear 17 can be controlled to be locked through the stopping component and can not rotate, so that the hollow roller 7 can not rotate in the blackboard eraser shell 1, then a cleaning component facing the outer side of the blackboard eraser shell 1 can wipe chalk marks, when the position of the transmission gear 17 is unlocked through the stopping component, the transmission gear 17 can be rotated to drive the driving sprocket 12 to rotate, the driving sprocket 12 and the driven sprocket 9 are respectively meshed with the transmission chain ring 13, the driving sprocket 12 is positioned at the inner side of the transmission chain ring 13, the two driven sprockets 9 are respectively positioned at the inner side and the outer side of the transmission chain ring 13, when the driving sprocket 12 rotates, the two driven sprockets 9 can be driven to rotate reversely, then the two hollow rollers 7 are driven to rotate reversely, so that different side surfaces of the hollow roller 7 face the outer side of the blackboard eraser shell 1, and therefore cleaning components on different side surfaces of the hollow roller 7 are adjusted to wipe the, the cleaning parts at all positions can be fully utilized and abraded uniformly, and the service life of the cleaning parts is greatly prolonged.

Furthermore, the present invention can also be considered in the present invention, the stopping component includes a stopping block 18 and a stopping box 27, one side of the stopping block 18 close to the transmission gear 17 is a concave arc surface, one side of the stopping block 18 close to the transmission gear 17 is carved with a tooth pattern 19, the tooth pattern 19 is engaged with the transmission gear 17, one side of the stopping block 18 away from the transmission gear 17 is fixedly connected with a stopping rod 20, the stopping rod 20 penetrates through the stopping box 27 and is connected with the pull ring 21, one side of the stopping box 27 close to the transmission housing 4 is fixedly connected with the transmission housing 4, the inside of the stopping box 27 is a hollow structure, and two sides are respectively provided with an opening for the stopping rod 20 to pass through, a limiting plate 22 is fixedly connected to a portion of the stopping rod 20 located in the stopping box 27, a telescopic spring 23 is sleeved on the stopping rod 20 between the limiting plate 22 and the stopping box 27, the extension spring 23 is positioned on one side of the limiting plate 22 away from the transmission gear 17.

When the position of the hollow roller 7 needs to be locked, the transmission gear 17 needs to be locked and cannot rotate, namely the stop block 18 is close to the transmission gear 17, so that the insection 19 is meshed with the transmission gear 17, the transmission gear 17 cannot rotate, when the hollow roller 7 needs to be adjusted to rotate, the transmission gear 17 needs to be unlocked through the stop component, the pull ring 21 needs to be pulled by one hand, so that the stop block 18 moves along with the stop rod 20 in the direction away from the transmission gear 17, the insection 19 is away from the transmission gear 17 and does not limit the rotation of the transmission gear 17, the hollow roller 7 is not limited to rotate, the transmission gear 17 needs to be rotated by the other hand, different positions of the cleaning component on the hollow roller 7 face the outer side of the blackboard eraser shell 1, and therefore the cleaning component on different sides of the.

Further, it is also contemplated in the present invention that the cleaning member includes a sponge layer 24, a plurality of felt strips 25, a plurality of brush strips 26, the periphery of the hollow roller 7 is uniformly divided into a wet wiping area, a felt dry wiping area and a brush hair dry wiping area along the circumferential direction, a sponge layer 24 is arranged on the periphery of the hollow roller at the wet wiping area, a plurality of felt strips 25 are uniformly arranged on the periphery of the hollow roller at the felt dry wiping area along the circumferential direction, a plurality of bristle strips 26 are uniformly arranged on the periphery of the hollow roller at the bristle dry-wiping area along the circumferential direction, felt strip 25, brush hair strip 26 are respectively along the installation of cavity roller 7 axial direction, and are adjacent evenly seted up a plurality of through-holes 30 along axial direction on the cavity roller 7 between the felt strip 25, and are adjacent evenly seted up a plurality of through-holes 30 along axial direction on the cavity roller 7 between the brush hair strip 26.

The periphery of the hollow roller 7 is uniformly divided into a wet wiping area, a felt dry wiping area and a brush dry wiping area along the circumferential direction, the periphery of the hollow roller at the wet wiping area is provided with a sponge layer 24, the periphery of the hollow roller at the felt dry wiping area is uniformly provided with a plurality of felt strips 25 along the circumferential direction, the periphery of the hollow roller at the brush dry wiping area is uniformly provided with a plurality of brush strips 26 along the circumferential direction, when the hollow roller 9 rotates to enable the sponge layer 24 on the wet wiping area to face the outer side of the eraser shell 1, the sponge layer 24 can wipe chalk marks on the blackboard, the sponge layer 24 can be immersed in water to wipe the chalk marks after being wetted, the cleaning efficiency is high, when the felt strips 25 on the felt dry wiping area face the outer side of the eraser shell 1, the felt strips 25 can wipe the chalk marks on the blackboard, and when the brush strips 26 on the brush dry wiping area face the outer side of the eraser shell 1, the brush strips 26 can wipe the chalk marks on the blackboard, thereby being suitable for being used under different conditions, being beneficial to the uniform abrasion of the cleaning part and greatly prolonging the service life of the cleaning part; because the hollow roller 7 between the adjacent felt strips 25 is uniformly provided with the plurality of through holes 30 along the axial direction, and the hollow roller 7 between the adjacent bristle strips 26 is uniformly provided with the plurality of through holes 30 along the axial direction, when the bristle strips 26 on the bristle dry-wiping area or the felt strips 25 on the felt dry-wiping area face the outer side of the blackboard eraser shell 1, the dust wiped off sequentially passes through the through holes 30 on the hollow roller 7, the dust suction nozzle 11, the dust suction pipe 10 and the micro dust collector 5 and enters the dust storage box 14 under the driving of the micro dust collector.

It should be noted that the sponge layer 24, the felt strip 25 and the bristle strip 26 can be mounted on the outer side wall of the hollow roller 7 by means of, but not limited to, gluing, which is prior art and will not be described in detail herein.

Still further, can also be in the utility model discloses in consider that the rear between two adjacent cavity rollers 7 is equipped with an extrusion piece 31, one side that extrusion piece 31 is close to cavity roller 7 is the cambered surface shape with cavity roller 7 looks adaptation, the rear of extrusion piece 31 is equipped with the drive part that drives extrusion piece 31 back-and-forth movement.

Because the two hollow rollers 7 are arranged in a vertically symmetrical manner, the two cleaning components are also arranged in a vertically symmetrical manner, when the sponge layers 24 on the two hollow rollers 7 are driven by the transmission component to face the outer side of the blackboard eraser shell 1, the sponge layers 24 can wipe chalk marks on the blackboard, the sponge layers 24 can be soaked in water to be wetted and then wiped, a large amount of water is sucked into the wetted sponge layers 24, the sponge layers 24 on the two hollow rollers 7 can be driven by the transmission component to face the extrusion block 31 (as shown in figure 3), the extrusion block 31 can be driven by the driving component to move forwards, one side of the extrusion block 31 close to the hollow rollers 7 is in an arc shape matched with the hollow rollers 7, the extrusion block 31 can extrude the sponge layers 24 and squeeze the water in the sponge layers 24, the wiping effect is prevented from being influenced by too much water, and then the sponge layers 24 on the two hollow rollers 7 are driven by the transmission component to face the outer side of the blackboard eraser shell 1 to wipe the chalk marks on the blackboard Wipe away, the utility model discloses a teacher and student have created conveniently, labour saving and time saving, convenient and fast erases efficiency and is showing and improve.

Still further, can also be in the utility model discloses in consider, the drive assembly includes that one is vertical locates 1 middle part of blackboard eraser casing and rotates the bull stick 32 of being connected with blackboard eraser casing 1, just the lower extreme of bull stick 32 stretches out outside blackboard eraser casing 1 and links to each other with runner 33, the symmetry is equipped with two sections screw thread sections that revolve to opposite, and threaded seat 34 has been screwed respectively on two screw thread sections, threaded seat 34 is close to one side of extrusion piece 31 and articulates there is a connecting rod 35, the other end of connecting rod 35 is articulated mutually with the middle part of extrusion piece 31 respectively, vertically be equipped with a draw runner 36 in the blackboard eraser casing 1 behind bull stick 32, the one end that threaded seat 34 is close to draw runner 36 is equipped with the spout with draw runner 36 sliding connection.

It should be noted that, the left and right sides of the pressing block 31 are respectively provided with a sliding block 37, the side wall of the board eraser housing 1 close to the sliding block 37 is vertically provided with a sliding rail 38, and the sliding block 37 can freely slide in the sliding rail 38.

Two thread sections with opposite rotation directions are symmetrically arranged on the rotating rod 32, two thread sections are respectively screwed with a thread seat 34, one side of the thread seat 34 close to the extrusion block 31 is hinged with a connecting rod 35, the other end of the connecting rod 35 is respectively hinged with the middle part of the extrusion block 31, when the rotating rod 32 can be driven to rotate forwards or reversely through the rotating wheel 33, the two thread seats 34 can be close to or far away from each other along the rotating rod 32 to move, then the extrusion block 31 can move forwards or backwards along the sliding rail 38 under the driving of the connecting rod 35, and therefore the extrusion block 31 can extrude moisture on the sponge layer 24 conveniently.

The utility model discloses a some other embodiments can also carry out free nimble configuration to the blackboard eraser for the teaching to can fully exert the technical advantage of the utility model. This is exemplified below.

For example, as shown in fig. 11, a blowing shell 39 is further provided, the blowing shell 39 is provided at the upper end of the board eraser shell 1, a blowing pipe 40 is provided in the blowing shell 39 along the length direction thereof, blowing nozzles 41 are evenly provided at the front end of the blowing pipe 40 along the axial direction thereof, a micro blower 42 is provided behind the blowing pipe 40, the micro blower 42 is fixedly connected in the blowing shell 39, both ends of the blowing pipe 40 are closed ends, and the input end of the blowing pipe 40 is communicated with the output end of the micro blower 42.

Can blow air to the blowpipe 40 in through micro-blower 42, then blow air through the blow nozzle 41 outwards, when the blackboard was drenched the back, accessible blow nozzle 41 blows air to the blackboard and helps drying the water stain on the blackboard, helps writing on the blackboard once more.

It should be noted that the specific structure, the working principle and the circuit structure of the micro dust collector and the micro blower used in the device are the prior art, and the device can work only by connecting the power lines of the micro dust collector and the micro blower with the mains supply respectively, so that the detailed description is omitted.

Furthermore, the utility model discloses a can also be considered in, the bracing piece that grips includes a flexible inner tube 28, the both ends telescopic setting of flexible inner tube 28 is in flexible outer tube 29, lock through lock sleeve 43 between flexible outer tube 29 and the flexible inner tube 28. The holding support rod has a telescopic function, and needs to be explained, the holding support rod belongs to the prior art, and has mature products in a plurality of fields, so the specific structure and the telescopic mode of the holding support rod are not detailed any more.

To sum up, the utility model provides a blackboard eraser is used in teaching convenient to adjust sponge layer, felt strip, brush hair strip used in turn is applicable to and uses under the different situation, improves and erases efficiency, improves the practicality of using, and can reduce the dust and fly upward, is convenient for water stain the blackboard and weathers.

Claims

1. The utility model provides a blackboard eraser is used in teaching, includes the blackboard eraser casing and locates the bracing piece that grips of blackboard eraser casing lower part, the bracing piece that grips is telescopic rod structure, grip the bracing piece and rotate with the universal shaft of the lower part of blackboard eraser casing through lockable and be connected, the blackboard eraser casing is front end open-ended shell structure, its characterized in that:

2. A blackboard eraser for teaching as claimed in claim 1, wherein: the one end that the ash absorption pipe is close to the transmission casing is the blind end and passes the inner wall looks rigid coupling of hollow shaft and transmission casing, the one end that is close to the ash absorption casing of ash absorption pipe is the open end and passes the hollow shaft and stretch into in the ash absorption casing and link to each other with the ash absorption house steward, the output of ash absorption house steward links to each other with the input of miniature dust catcher, the output and the dust storage box of miniature dust catcher are linked together, be equipped with the filter screen in the dust storage box, the output of dust storage box links to each other with the one end of exhaust pipe, the diapire that the other end of exhaust pipe passes through the ash absorption casing stretches out outside the ash.

3. A blackboard eraser for teaching as claimed in claim 1, wherein: the blackboard eraser is characterized in that two ends of a wheel shaft in the middle of the driving chain wheel are respectively rotatably connected with the side walls of the blackboard eraser shell and the transmission shell, the driving chain wheel is in transmission connection with the driven chain wheels through the transmission chain ring, the driving chain wheel is located on the inner side of the transmission chain ring, the two driven chain wheels are respectively located on the inner side and the outer side of the transmission chain ring, the driving chain wheel and the driven chain wheels are respectively meshed with the transmission chain ring, one end of the wheel shaft of the driving chain wheel extends out of the transmission shell to be connected with the transmission gear, and a stopping component for controlling the driving chain wheel to stop is arranged.

4. A blackboard eraser for teaching as claimed in claim 3, wherein: the stop component comprises a stop block and a stop box body, one side of the stop block, which is close to the transmission gear, is in a concave arc surface shape, one side of the stop block, which is close to the transmission gear, is carved with insections, the insections are meshed with the transmission gear, one side of the stop block, which is far away from the transmission gear, is fixedly connected with a stop rod, the stop rod penetrates through the stop box body and is connected with a pulling ring, one side of the stop box body, which is close to the transmission shell, is fixedly connected with the transmission shell, the inside of the stop box body is of a hollow structure, openings for the stop rod to pass through are respectively formed in two sides of the stop box body, a limiting plate is fixedly connected to the part of the stop rod, which is located in the stop box body, a telescopic spring.

5. A blackboard eraser for teaching as claimed in claim 1, wherein: cleaning element includes sponge layer, many felt strip, many brush hair strip, the periphery of well cavity roller is along its circumferencial direction evenly divided wet district, felt dry wiping district, brush hair dry wiping district, install the sponge layer in the well cavity roller periphery of wet district department of wiping, evenly install many felt strip along the circumferencial direction in the well cavity roller periphery of felt dry wiping district department, evenly be equipped with many brush hair strip along the circumferencial direction in the well cavity roller periphery of brush hair dry wiping district department, the installation of well cavity roller axial direction is followed respectively to felt strip, brush hair strip, adjacent evenly seted up a plurality of through-holes along axial direction on the well cavity roller between the felt strip, adjacent evenly seted up a plurality of through-holes along axial direction on the well cavity roller between the brush hair strip.

6. The blackboard eraser for teaching according to claim 5, wherein: an extrusion block is arranged behind the two adjacent hollow rollers, one side of the extrusion block, which is close to the hollow rollers, is in an arc shape matched with the hollow rollers, and a driving part for driving the extrusion block to move back and forth is arranged behind the extrusion block.

7. The blackboard eraser for teaching according to claim 6, wherein: the blackboard eraser comprises an eraser shell, a driving component and a rotating rod, wherein the driving component comprises a rotating rod which is vertically arranged in the middle of the eraser shell and is rotationally connected with the eraser shell, the lower end of the rotating rod extends out of the eraser shell and is connected with a rotating wheel, two thread sections with opposite rotating directions are symmetrically arranged on the rotating rod, a thread seat is respectively screwed on the two thread sections, one side of the thread seat close to an extrusion block is hinged with a connecting rod, the other end of the connecting rod is respectively hinged with the middle of the extrusion block, a sliding strip is vertically arranged in the eraser shell behind the rotating rod, and one end of the thread seat close to the sliding strip is provided with a sliding groove which is in sliding connection with the sliding.

8. A blackboard eraser for teaching as claimed in claim 7, wherein: the blackboard eraser is characterized in that the left side and the right side of the extrusion block are respectively provided with a sliding block, a sliding rail is vertically arranged on the side wall of the blackboard eraser shell close to the sliding block, and the sliding block can freely slide in the sliding rail.

9. A blackboard eraser for teaching according to any one of claims 1 to 8, wherein: the blackboard eraser is characterized by further comprising a blowing shell, the blowing shell is arranged at the upper end of the blackboard eraser shell, a blowing pipe is arranged in the blowing shell along the length direction of the blowing pipe, blowing nozzles are evenly arranged at the front end of the blowing pipe along the axial direction of the blowing pipe, a micro air blower is arranged behind the blowing pipe and fixedly connected into the blowing shell, the two ends of the blowing pipe are closed ends, and the input end of the blowing pipe is communicated with the output end of the micro air blower.

10. A blackboard eraser for teaching as claimed in claim 1, wherein: the holding support rod comprises a telescopic inner tube, two ends of the telescopic inner tube are arranged in the telescopic outer tube in a telescopic mode, and the telescopic outer tube and the telescopic inner tube are locked through a locking sleeve.