CN207140635U

CN207140635U - A kind of novel blackboard eraser

Info

Publication number: CN207140635U
Application number: CN201720483428.5U
Authority: CN
Inventors: 王锐
Original assignee: Yuncheng University
Current assignee: Yuncheng University
Priority date: 2017-05-03
Filing date: 2017-05-03
Publication date: 2018-03-27
Anticipated expiration: 2027-05-03

Abstract

It the utility model is related to a kind of teaching aid, specifically a kind of novel blackboard eraser, outer box including transfer roller and open top, the transfer roller is horizontally installed in the outer box unidirectional rotatablely, coated in the peripheral outer wall of the transfer roller and be fixed with felt, and the felt is located at the part of the cover top portion and exposes opening at the top of the outer box, if the outer box bottom, which corresponds to the transfer roller, is vertically fixed dry elasticity buttress shaft.The utility model is simple in construction, and sustainable long-time uses, and can conveniently remove the chalk dust on felt and chalk dust will not be flown upward everywhere, teaching environment will not be caused to pollute, beneficial to health.

Description

A kind of novel blackboard eraser

Technical field

A kind of teaching aid is the utility model is related to, specifically a kind of novel blackboard eraser.

Background technology

In teaching process, the letter written with chalk generally use blackboard eraser write on blackboard is wiped, existing blackboard eraser mainly by Handheld Division and the felt being fixed on Handheld Division are formed, and the blackboard eraser of this structure needs to shake often in use to shrug off Chalk dust on felt can be just continuing with, and can not be used for a long time, and shake blackboard eraser can make to be attached on felt Chalk dust is flown upward everywhere, causes teaching environment to pollute, and is unfavorable for health.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of simple in construction, sustainable long-time use, can be square Just efficiently remove the chalk dust on felt and chalk dust will not be flown upward everywhere, teaching environment will not be caused to pollute, beneficial to human body The novel blackboard eraser of health.

The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of novel blackboard eraser, including transfer roller and top The open outer box in portion, the transfer roller are horizontally installed in the outer box, wrapped in the peripheral outer wall of the transfer roller unidirectional rotatablely Cover and be fixed with felt, and the opening at the top of the outer box is exposed in the part that is located at the top of the outer box of the felt, it is described outer If cassette bottom portion corresponds to the transfer roller and is vertically fixed dry elasticity buttress shaft.

The beneficial effects of the utility model are：Simple in construction, user holds when needing to wipe the letter written with chalk on blackboard The outer box wipe the powder on blackboard along the non-rotatable direction of the transfer roller using the felt exposed at the top of the outer box Word, when the part felt is unavailable, rotates the transfer roller, the felt exposes new available part, you can continues to make With the utility model, realize that the sustainable long-time of the utility model uses；In addition, when all parts of the felt without when, The transfer roller is quickly rotated, the chalk dust adhered on the felt is quickly brushed off using the elasticity of the elastic buttress shaft, dropped Chalk dust fall the bottom in the outer box, will not everywhere fly upward, pour into dustbin, can conveniently remove felt On chalk dust and chalk dust will not fly upward everywhere, teaching environment will not be caused to pollute, beneficial to health.

Further, corresponded in outer box and be fixedly installed one-directional rotation respectively in the side wall at the axis both ends of the transfer roller Part, the axis both ends of the transfer roller are connected with the one-directional rotation part respectively.

It is using the above-mentioned further beneficial effect of technical scheme：Realize the transfer roller in institute by the one-directional rotation part State one-directional rotation in outer box.

Further, each one-directional rotation part includes handle ratchet wheel and at least one spine to match with the handle ratchet wheel Pawl, the handle ratchet wheel are fixed in the outer box in corresponding side wall, and the axis both ends of the transfer roller are each passed through corresponding institute The mesopore of handle ratchet wheel is stated, the connection end of the ratchet is articulated with corresponding to the axis of the transfer roller in the side wall of one end, the ratchet Positive stop end be located in the teeth groove of the handle ratchet wheel.

It is using the above-mentioned further beneficial effect of technical scheme：Realized using the cooperation of the handle ratchet wheel and the ratchet Transfer roller one-directional rotation in the outer box, reliability are high.

Further, in addition to handle section is in the release handle of polygon, is corresponded in the side wall of the outer box described in one of them The position of the mesopore of ratchet offers positioning through hole, the axis of the transfer roller to should one end of ratchet be located at the positioning through hole It is interior, the adjustment hole to match with the release handle is offered on its end face, described in the release handle can insert outside the outer box Adjustment hole.

It is using the above-mentioned further beneficial effect of technical scheme：The release handle inserts the adjustment hole, described in rotation Release handle drives the transfer roller to be easy to user conveniently to brush off the chalk on the felt in the shell internal rotation Ash.

Further, it is provided with lid at the open top of the outer box.

It is using the above-mentioned further beneficial effect of technical scheme：When the felt needs to brush lightly chalk dust, cover described Lid, it is ensured that chalk dust will not be flown upward everywhere, avoid polluting teaching environment, ensure health.

Further, the axial cross section of the transfer roller is square.

It is using the above-mentioned further beneficial effect of technical scheme：Ensure the utility model structural stability, expand simultaneously Area is exposed in the felt exposed portion, improves chalk dust efficiency of erasing.

Brief description of the drawings

, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art.In all of the figs, it is similar Element or part are typically identified by similar reference.In accompanying drawing, each element or part might not be according to the ratios of reality Draw.

Fig. 1 is internal structure schematic diagram of the present utility model；

Fig. 2 is Fig. 1 top view；

Fig. 3 is the structural representation of one-directional rotation part described in the utility model；

Fig. 4 is the front view of release handle described in the utility model；

Reference：

1- outer box；2- lids；3- transfer rollers；4- axis；5- felts；6- elasticity buttress shafts；7- handle ratchet wheels；8- ratchets；9- is adjusted Handle；10- one-directional rotation parts

Embodiment

The embodiment of technical solutions of the utility model is described in detail below in conjunction with accompanying drawing.Following examples are only For clearly illustrating the technical solution of the utility model, therefore example is only used as, and this practicality can not be limited with this New protection domain.

As shown in figure 1, a kind of novel blackboard eraser, including the outer box 1 of transfer roller 3 and open top, transfer roller 3 are unidirectional rotatable Ground is horizontally installed in outer box 1, is coated in the peripheral outer wall of transfer roller 3 and is fixed with felt 5, and felt 5 is located at the top of outer box The opening at the top of outer box 1 is exposed in part, if the bottom of outer box 1, which corresponds to transfer roller 3, is vertically fixed dry elasticity buttress shaft 6.

In the present embodiment：

One-directional rotation is fixedly installed respectively in the side wall at the both ends of axis 4 of transfer roller 3 as shown in Fig. 2 being corresponded in outer box 1 Part 10, the both ends of axis 4 of transfer roller 3 are connected with one-directional rotation part 10 respectively；

As shown in figures 1 and 3, each one-directional rotation part 10 includes handle ratchet wheel 7 and two spine to match with handle ratchet wheel 7 Pawl 8, handle ratchet wheel 7 are fixed in outer box 1 in corresponding side wall, and the both ends of axis 4 of transfer roller 3 are each passed through corresponding handle ratchet wheel 7 Mesopore, the connection end of ratchet 8 are articulated with corresponding to the axis 4 of transfer roller 3 in the side wall of one end, and the positive stop end of ratchet 8 is located at handle ratchet wheel In 7 teeth groove；

As shown in Figure 1 and Figure 4, in addition to handle section release handle 9 triangular in shape, corresponding wherein one in the side wall of outer box 1 The position of the mesopore of individual ratchet offers positioning through hole, the axis 4 of transfer roller 3 to should one end of ratchet be located in positioning through hole, The adjustment hole to match with release handle 9 is offered on its end face, release handle 9 can insert adjustment hole outside outer box 1；The top of outer box 1 Portion's open-mouth is provided with lid 2；The axial cross section of transfer roller 3 is square.

Occupation mode：

User holds outer box 1 and utilizes dew along 3 non-rotatable direction of transfer roller when needing to wipe the letter written with chalk on blackboard The felt 5 gone out at the top of outer box 1 wipes the letter written with chalk on blackboard, when the part felt 5 is unavailable, rotates transfer roller 3, felt 5 reveals Go out new available part, you can be continuing with；When 5 all parts of felt without when, cover lid 2, release handle 9 inserted Adjustment hole, the quick release handle 9 that rotates drives transfer roller 3 quickly to be rotated in shell, using the elasticity of elastic buttress shaft 6 by felt 5 The chalk dust of attachment quickly brushes off, and the chalk dust to drop falls the bottom in outer box 1, will not fly upward everywhere, pours into dustbin i.e. Can.

Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly The scope of each embodiment technical scheme of type, it all should cover among claim of the present utility model and the scope of specification.

Claims

A kind of 1. novel blackboard eraser, it is characterised in that：Outer box (1) including transfer roller (3) and open top, the transfer roller (3) can One-directional rotation it is horizontally installed in the outer box (1), is coated in the peripheral outer wall of the transfer roller (3) and be fixed with felt (5), And the opening at the top of the outer box (1), outer box (1) bottom are exposed in the part that is located at the top of the outer box of the felt (5) The corresponding transfer roller (3) is if be vertically fixed dry elasticity buttress shaft (6).
A kind of 2. novel blackboard eraser according to claim 1, it is characterised in that：The transfer roller (3) is corresponded in outer box (1) Axis (4) both ends side wall on be fixedly installed one-directional rotation part (10) respectively, axis (4) both ends point of the transfer roller (3) It is not connected with the one-directional rotation part (10).
A kind of 3. novel blackboard eraser according to claim 2, it is characterised in that：Each one-directional rotation part (10) includes Handle ratchet wheel (7) and at least one ratchet (8) to match with the handle ratchet wheel (7), the handle ratchet wheel (7) are fixed on the outer box (1) in corresponding side wall, axis (4) both ends of the transfer roller (3) are each passed through the mesopore of the corresponding handle ratchet wheel (7), The connection end of the ratchet (8) is articulated with corresponding to the axis (4) of the transfer roller (3) in the side wall of one end, the limit of the ratchet (8) Position end is located in the teeth groove of the handle ratchet wheel (7).
A kind of 4. novel blackboard eraser according to claim 3, it is characterised in that：Also include the regulation that handle section is in polygon Handle (9), the position for the mesopore for corresponding to one of them ratchet in the side wall of the outer box (1) offers positioning through hole, described The axis (4) of transfer roller (3) to should one end of ratchet be located in the positioning through hole, offered on its end face and the release handle (9) adjustment hole to match, the release handle (9) can insert the adjustment hole outside from the outer box (1).
A kind of 5. novel blackboard eraser according to any one of Claims 1-4, it is characterised in that：The top of the outer box (1) Open-mouth is provided with lid (2).
A kind of 6. novel blackboard eraser according to any one of Claims 1-4, it is characterised in that：The axial direction of the transfer roller (3) Section is square.