CN209534593U

CN209534593U - Blackboard eraser

Info

Publication number: CN209534593U
Application number: CN201920099141.1U
Authority: CN
Inventors: 王逸梵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-21
Filing date: 2019-01-21
Publication date: 2019-10-25
Anticipated expiration: 2029-01-21

Abstract

The utility model discloses a kind of blackboard eraser, which includes shell, blackboard eraser body, scrapes bar assembly, gear and handle；Shell is in hollow setting, and outer casing top surface has provided fixation hole, and side wall of outer shell has provided the first perforation；Blackboard eraser body, to extension, can be installed on fixation hole to axis overturning along left and right along left and right；Scraping bar assembly includes the support portion and tooth band extended along left and right；Support portion is fixed on housing interior side-wall and is located at below blackboard eraser body, and support portion left end and right end are arranged in circular arc；Tooth band is annularly arranged, and along left and right to arrangement, is set to support portion periphery, the rack gear of tooth band is arranged to form tooth socket back to support portion, and tooth band is peripherally pivoted to interfere with blackboard eraser body bottom surface around support portion；Gear is rotatably installed in shell, and the gear teeth of gear are meshed with tooth band so that gear band movable tooth band rotates；The dust for aiming to solve the problem that existing blackboard eraser takes is flown upward everywhere, pollutes environment, working costs, it is laborious, low efficiency, endanger the problem of health.

Description

Blackboard eraser

Technical field

The utility model relates to teaching aid technical field, in particular to a kind of blackboard eraser.

Background technique

Blackboard eraser is teaching aid indispensable in teaching, can be wiped the writing on blackboard using blackboard eraser It goes, writing and erasing that can be on blackboard repeatedly.Existing blackboard eraser is covered with dust after sassafras blackboard on blackboard eraser, generally, Blackboard eraser is covered with the one of dust and faces wall or floor beating, dust is taken, but the dust taken is flown upward everywhere, is polluted Environment, the long-term dust that sucks is to the health of student and teacher and its unfavorable, or even causes the occupational disease of teacher, and use Time-consuming, laborious, low efficiency endangers health.

Utility model content

The main purpose of the utility model is to propose a kind of blackboard eraser, it is intended to solve the dust four that existing blackboard eraser takes Place is flown upward, and pollutes environment, working costs, it is laborious, low efficiency, endanger the problem of health.

To achieve the above object, the utility model proposes a kind of blackboard eraser, which includes:

Shell is in hollow setting, and the outer casing top surface has provided fixation hole, and the side wall of outer shell has provided the first perforation；

Blackboard eraser body can be installed on the fixation hole to axis overturning along left and right along left and right to extension；

Bar assembly is scraped, including the support portion and tooth band extended along left and right；The support portion is fixed on the housing interior side-wall And be located at below the blackboard eraser body, the support portion left end and right end are arranged in circular arc；The tooth band is annularly arranged, edge Left and right is set to the support portion periphery, the rack gear of the tooth band is arranged back to the support portion to form tooth socket, described to arrangement Tooth band is peripherally pivoted to interfere with the blackboard eraser body bottom surface around the support portion；

Gear is rotatably installed in the shell, and the gear teeth of the gear are meshed with the tooth band so that described Gear drives the tooth band rotation；

Handle, including fixed part, one end of the fixed part are fixed in the gear hole of the gear, and the other end passes through institute The first perforation is stated to be located at outside the shell；The fixed part outward bending forms the driving portion extended along the outer side of shell wall, The one end of the driving portion far from the fixed part is held to hand to rotate the handle, and the handle is around the fixed part Axial-rotation is to drive the gear to rotate.

Optionally, the transverse tooth thickness of the gear teeth of the tooth band is from close described support portion one end to separate described support portion one end Direction is in gradually small setting.

Optionally, dust collecting trough is equipped in the shell, the dust collecting trough is set to below the blackboard eraser body.

Optionally, the side wall of outer shell lower part is equipped with the second perforation, and second perforated side wall is equipped with the first magnetic part；

The dust collecting trough has lower limiting board and upwardly extends the frame to be formed, described frame one end from lower limiting board periphery In second perforation, the frame position opposite with first magnetic part equipped with the second magnetic part, with it is described The cooperation of first magnetic part magnetic.

Optionally, the blackboard eraser further includes dust blowing elastic slice, and the dust blowing elastic slice includes mounting portion, the mounting portion front end It is fixed on the housing interior side-wall with rear end, the mounting portion extends along the direction that the tooth socket of the tooth band extends；The installation It protrudes upward to form dust blowing portion in the middle part of portion, the dust blowing portion and the rack gear are interfered.

Optionally, the upper end in the dust blowing portion extends to the tooth socket bottom wall of the tooth band.

Optionally, the rotation axis along left and right to extension, the blackboard eraser body are detachably installed in the middle part of the fixation hole Position corresponding with the rotation axis has provided third perforation, and the rotation axis is fixed in the third perforation with will be described black Blackboard eraser ontology is fixed in the fixation hole.

In the utility model, in the fixation hole that blackboard eraser body is rotationally fixed to shell, when blackboard eraser body After one side is covered with dust, make the side towards the tooth band scraped in bar assembly, rotational handle band movable tooth blackboard eraser body rotation Wheel rotation, the tooth socket fit of the gear teeth of gear and tooth band, thus with movable tooth band around the periphery rotation of support portion, the rack gear of tooth band with Blackboard eraser body is covered with the one side interference of dust, and in tooth band rotary course, the interference between rack gear and blackboard eraser body can Dust in blackboard eraser body 2 is scraped, dust is can avoid and flies upward everywhere and pollute air, influence the health of academics and students.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the schematic perspective view of an embodiment of blackboard eraser provided by the utility model；

Fig. 2 is the sectional structure chart at the first visual angle of the blackboard eraser that Fig. 1 is provided；

Fig. 3 is the sectional structure chart at the second visual angle of the blackboard eraser that Fig. 1 is provided.

Drawing reference numeral explanation:

Label	Title	Label	Title
				100	Blackboard eraser	5	Handle
1	Shell	51	Fixed part
				2	Blackboard eraser body	52	Driving portion
21	Rotation axis	6	Dust collecting trough
				3	Scrape bar assembly	61	Lower limiting board
31	Support portion	62	Frame
				32	Tooth band	6a	First magnetic part
321	Rack gear	6b	Second magnetic part
				4	Gear	7	Dust blowing elastic slice
41	First gear	71	Mounting portion
				42	Second gear	72	Dust blowing portion

The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, fall within the protection scope of the utility model.

It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture) Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.

In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve The combination of case is not present, also not within the protection scope of the requires of the utility model.

In consideration of it, the utility model proposes a kind of blackboard eraser, Fig. 1 to Fig. 3 be the utility model proposes blackboard eraser one The structural schematic diagram of embodiment.

As depicted in figs. 1 and 2, which includes shell 1, blackboard eraser body 2, scrapes bar assembly 3, gear 4 and handle 5；Shell 1 is in hollow setting, and 1 top surface of shell provided fixation hole (being not marked in figure), and 1 side wall of shell has provided the One perforation (being not marked in figure)；Blackboard eraser body 2, to extension, can be installed on the fixation to axis overturning along left and right along left and right Hole；Scraping bar assembly 3 includes the support portion 31 and tooth band 32 extended along left and right；The support portion 31 is fixed on 1 inside of shell Wall and it is located at 2 lower section of the blackboard eraser body, 31 left end of support portion and right end are in circular arc setting；The tooth band 32 is annular in shape Setting is set to 31 periphery of support portion along left and right to arrangement, and the rack gear 321 of the tooth band 32 is set back to the support portion 31 It sets to form tooth socket, the tooth band 32 is peripherally pivoted to interfere with 2 bottom surface of blackboard eraser body around the support portion 31；It is described Gear 4 is rotatably installed in the shell 1, and the gear 4 is meshed with the tooth band 32 so that the gear 4 drives institute State the rotation of tooth band 32；Handle 5 includes fixed part 51, and one end of the fixed part 51 is fixed in the gear hole of the gear 4, separately One end passes through first perforation and is located at outside the shell 1；51 outward bending of fixed part is formed along 1 lateral wall of shell The driving portion 52 of extension, the one end of the driving portion 52 far from the fixed part 51 are held to hand to rotate the handle 5, The handle 5 drives the gear 4 to rotate around 51 axial-rotation of fixed part.

In the utility model, in the fixation hole that blackboard eraser body 2 is rotationally fixed to shell 1, when blackboard eraser body 2 One side be covered with dust after, by blackboard eraser body 2 rotation make the side towards the tooth band 32 scraped in bar assembly 3, rotational handle 5 Band moving gear 4 rotates, the gear teeth of gear 4 and the tooth socket fit of tooth band 32, thus with movable tooth band 32 around the outer spinning of support portion 31 Turning, the one side that the rack gear 321 and blackboard eraser body 2 of tooth band 32 are covered with dust is interfered, in 32 rotary course of tooth band, rack gear Interference between 321 and blackboard eraser body 2 can scrape the dust in blackboard eraser body 2, can avoid dust and fly upward everywhere and dirty Air is contaminated, the health of academics and students is influenced.

Further, the upper and lower surfaces at 31 middle part of support portion are recessed inwardly to form concave surface, i.e. support portion 31 End to the middle part in thickness self-supporting portion 31 gradually become smaller, reduce the contact area between support portion 31 and tooth band, so as to Reduce the frictional force between support portion 31 and tooth band.It is understood that tooth band 32 is located on support portion 31, tooth band 32 is arranged For tensioned state, tooth band 32 and 2 bottom interference of blackboard eraser body can be made.

Further, the transverse tooth thickness of the rack gear 321 is from close described 31 one end of support portion to far from the support portion 31 1 The direction at end is in gradually small setting, is gradually reduced the transverse tooth thickness of rack gear 321, while not influencing the robustness of rack gear 321, makes rack gear 321 is sharper, can more swimmingly scrape the dust in blackboard eraser body 2.

Traditional blackboard eraser body 2 can only be erased the board using upper surface, and utilization rate is lower, in the present embodiment, described black The width and thickness size of blackboard eraser ontology 2 is identical, i.e. the upper surface, lower surface of blackboard eraser 100 and the cross of two opposite side surfaces Section is identical, rotating blackboard eraser ontology 2, so that four surfaces of blackboard eraser body 2 can be used to erase the board, improves blackboard eraser The utilization rate of ontology 2.

Generally, the material of blackboard eraser body 2 is wear-resisting foam, sponge etc., is exerted a force to 2 side of blackboard eraser body, by There is elasticity in blackboard eraser body 2, blackboard eraser body 2 can be rotated, by dusty one side towards scraping in bar assembly 3 Tooth band 32.It is understood that scraping bar assembly 3 is set to 2 bottom of blackboard eraser body, when being erased the board with blackboard eraser body 2, Scraping bar assembly 3 has certain supporting role to blackboard eraser body 2, can avoid blackboard eraser body 2 rotate easily and to erasing the board It impacts.

As shown in Figures 2 and 3, it is equipped with dust collecting trough 6 in the shell 1, the dust collecting trough 6 is set to the blackboard eraser body 2 Lower section.1 lower sidewall of shell is equipped with the second perforation (being not marked in figure), and second perforated side wall is equipped with the first magnetic part 6a；The dust collecting trough 6 has lower limiting board 61 and upwardly extends the frame 62 to be formed, the frame 62 from 61 periphery of lower limiting board One end is located in second perforation, and the frame 62 position opposite with the first magnetic part 6a is equipped with the second magnetic part 6b, so set, take out dust collecting trough 6 can from the second perforation, will be collected with cooperating with the first magnetic part 6a magnetic Dust in grooving is poured out, and dust collecting trough 6 is fixed on shell by the first magnetic part 6a and the second magnetic part 6b cooperated using magnetic In 1, so that the structure of blackboard eraser 100 is simple.

The blackboard eraser 100 further includes dust blowing elastic slice 7, and the dust blowing elastic slice includes mounting portion 71, before the mounting portion 71 1 inner sidewall of shell is fixed in end and rear end, and the mounting portion 71 extends along the direction that the tooth socket of the tooth band 32 extends；Institute It states and protrudes upward to form dust blowing portion 72 in the middle part of mounting portion 71, the dust blowing portion 72 interferes with the rack gear 321.It is revolved using handle 5 Turn band carry-over bar 321 to rotate, dust blowing elastic slice can scrape off the dust being stained on rack gear 321, keep the cleaning of rack gear 321, keep away Exempt to be stained with a large amount of dust on rack gear 321 and influence rack gear 321 and act on the dust blowing of blackboard eraser body 2.

Further, the upper end in the dust blowing portion 72 extends to the tooth socket bottom wall of the tooth band 32, and rack gear 321 is rotating through Cheng Zhong, when the tooth socket of rack gear 321 is opposite with dust blowing elastic slice, dust blowing elastic slice can connect with tooth socket bottom wall, so that dust blowing elastic slice can The dust that tooth socket bottom wall is stained with is scraped, the cleaning of tooth socket bottom wall is kept, avoids being stained with a large amount of dust on tooth socket bottom wall and influencing The mating reaction of 4 gear teeth of gear and 321 tooth socket of rack gear rotates to influence gear 4 with carry-over bar 321.

Rotation axis 21 along from left and right to extension, the blackboard eraser body 2 and institute are detachably installed in the middle part of the fixation hole It states the corresponding position of rotation axis 21 and has provided third perforation (being not marked in figure), the rotation axis 21 is fixed on the third perforation It is interior the blackboard eraser body 2 to be fixed in the fixation hole, enhancing blackboard eraser body 2 be fixed on the stabilization in fixation hole Property, prevents in the process to erase the board, due between blackboard eraser body 2 and blackboard frictional force and blackboard eraser body 2 by Thrust, can avoid blackboard eraser body 2 it is backing out from fixation hole.

The gear 4 includes first gear 41 and second gear 42, and the tooth top diameter of a circle of the second gear 42 compares institute The tooth top diameter of a circle for stating first gear 41 is big, and the first gear 41 and the second gear 42 are fixedly installed in outside described 1 side wall of shell, the tooth socket fit of the gear teeth of the first gear 41 and the tooth band 32 so that the first gear 41 drive it is described Tooth band 32 rotates, and the gear teeth of the tooth socket of the first gear 41 and the second gear 42 cooperate, so that the second gear 42 The first gear 41 is driven to rotate；One end of the fixed part 51 is fixed in the gear hole of the second gear 42.Handle 5 Rotation drives biggish second gear 42 to rotate, and biggish second gear 42 drives lesser first gear 41 to rotate, handle 5 with Biggish gear 4 connects, and handle 5 rotates one week, and the mobile distance of rack gear 321 is bigger, and handle 5 rotates faster, and rack gear 321 moves Dynamic distance is bigger, by increasing a biggish gear 4, can reduce the revolution of rotatable handle.

The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all Under the inventive concept of the utility model, equivalent structure transformation made based on the specification and figures of the utility model, or Directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims

1. a kind of blackboard eraser characterized by comprising

Bar assembly is scraped, including the support portion and tooth band extended along left and right；The support portion is fixed on the housing interior side-wall and position Below the blackboard eraser body, the support portion left end and right end are arranged in circular arc；The tooth band is annularly arranged, along left and right To arrangement, it is set to the support portion periphery, the rack gear of the tooth band is arranged back to the support portion to form tooth socket, the tooth band It is peripherally pivoted to interfere with the blackboard eraser body bottom surface around the support portion；

Gear is rotatably installed in the shell, and the gear teeth of the gear are meshed with the tooth band so that the gear The tooth band is driven to rotate；

Handle, including fixed part, one end of the fixed part are fixed in the gear hole of the gear, and the other end passes through described the One perforation is located at outside the shell；The fixed part outward bending forms the driving portion extended along the outer side of shell wall, described The one end of driving portion far from the fixed part is held to hand to rotate the handle, and the handle is axial around the fixed part Rotation is to drive the gear to rotate.

2. blackboard eraser as described in claim 1, which is characterized in that the transverse tooth thickness of the tooth band from close to described support portion one end to Direction far from described support portion one end is in gradually small setting.

3. blackboard eraser as described in claim 1, which is characterized in that be equipped with dust collecting trough in the shell, the dust collecting trough is set to Below the blackboard eraser body.

4. blackboard eraser as claimed in claim 3, which is characterized in that the side wall of outer shell lower part is equipped with the second perforation, and described the Two perforated side walls are equipped with the first magnetic part；

The dust collecting trough has lower limiting board and upwardly extends the frame to be formed from lower limiting board periphery, and described frame one end is located at In second perforation, the frame position opposite with first magnetic part is equipped with the second magnetic part, with described first The cooperation of magnetic part magnetic.

5. blackboard eraser as described in claim 1, which is characterized in that the blackboard eraser further includes dust blowing elastic slice, the dust blowing bullet Piece includes mounting portion, and the housing interior side-wall is fixed in the mounting portion front-end and back-end, and the mounting portion is along the tooth band The direction that tooth socket extends extends；It protrudes upward to form dust blowing portion in the middle part of the mounting portion, the dust blowing portion and the rack gear are interfered.

6. blackboard eraser as claimed in claim 5, which is characterized in that the upper end in the dust blowing portion extends to the tooth socket of the tooth band Bottom wall.

7. blackboard eraser as described in claim 1, which is characterized in that be detachably equipped with along left and right Xiang Yan in the middle part of the fixation hole The rotation axis stretched, blackboard eraser body position corresponding with the rotation axis have provided third perforation, and the rotation axis is fixed It is interior the blackboard eraser body to be fixed in the fixation hole in third perforation.