CN205009831U - A page blackboard device turns over - Google Patents

Abstract

The utility model discloses a page blackboard device turns over, including the support with install a plurality of blackboard pages or leaves in the support, the blackboard page or leaf passes through the connecting axle setting in the support, the gear wheel is installed to the one end of connecting axle, the large gear transmission of two adjacent connecting axles, one of them connecting axle one end is connected with and is used for power input device, the back of support still is provided with the slidable blackboard eraser, the content that realizes erasing the blackboard page or leaf through the slip blackboard eraser, the utility model discloses a page blackboard device turns over utilizes gear drive to realize the positive and negative of all blackboard pages or leaves and changes simultaneously, and easy operation only needs rotation power input device when we need wipe the blackboard, forwards the blackboard page or leaf to the back, then moves the blackboard eraser and can drive the writing on the blackboard of writing on the blackboard page or leaf, and when like this can greatly reduced openly blacking the board, the dust that hikes up endangers simple structure reasonable in design to the healthy of teacher or student.

Description

A kind of page turning blackboard device

[technical field]

The utility model belongs to instructional device field, is specifically related to a kind of page turning blackboard device.

[background technology]

Chalk, it similarly is the large face of teacher's impart knowledge, classmates are allowed to obtain due knowledge, be it, allow classmates draw beautiful blackboard newspaper, but, also for we bring high risks when it plays greatly effect time, have a strong impact on the physical and mental health of teacher and classmate, and chalk dust also has to academics and students and a large amount of cannot see impalpable actual bodily harm, drastically influence the healthy of teacher student:

1, harm to lung: dust is to the harm of teacher's health, the most common with lung, in teaching process, after chalk dust is easy to be inhaled into lung, majority is delayed in alveolar, through a series of stimulation, the effect of chemistry and immunity just can cause lung to lose, comprise inflammation in respiratory system and pulmonary ventilation function decline, common PUD D has: chronic, acute pneumonia, lung cancer, pneumoconiosis etc. (namely contain silica in chalk dust, be inhaled into lung, the dioxide-containing silica dissociated in lung forms the dust of pulmonary fibrosis more than one of percentage, thus make alveolar fibrosis, lung's respiratory function is caused to decline).

2, to the harm of the upper respiratory tract: the approach that chalk dust enters lung comprises nose, pharynx, bronchus by the upper respiratory tract, in this course, part dust can stay in the upper respiratory tract, mechanical stimulus and damage are produced to mucomembranous epithelial cell, work in such a case for a long time, can cause a series of pathology, wherein modal on the impact of nose is bring out rhinitis sicca, next is hypertrophic rhinitis, and symptom is mycteroxerosis, nasal obstruction, nasal membrane congested, secretion increases; Mainly bring out chronic pharyngitis to the impact of pharynx, make pharyngeal drying, not well, the pharyngalgia of coughing up phlegm pharynx is itched; Mainly chronic bronchitis is brought out to bronchial impact, sometimes also can cause asthma, also likely cause the canceration of the part such as nasopharynx, bronchus in addition.

3, to the harm of eyes: teacher is in teaching process, and chalk dust falls into eye, lacrimal secretion is stimulated, tears are hydrolyzed calcium carbonate and produce alkaline matter, seriously will stimulate eye mucous membranes, cause mucosa injury, form chronic inflammation, also may bring out the generation of myopia.

4, harm to skin: teacher is in teaching process, chalk dust inevitably sticks on hand, the granule dust simultaneously floated in air also can drop on teacher's hair, on the face with on neck, spread effect is had to skin membrane, if meet sweat solution hot summer days, produce alkaline matter, just larger to Mucocutaneous stimulation, because the environment that human body skin is survived is weak acid environment, the basic living environment of skin is destroyed like this under the effect of dust alkalescence, chalk dust makes skin become dry, coarse, and with sensation of scratching where it itches, make human body uncomfortable, severe patient can cause acne, folliculitis, pyoderma, chapped skin and a large amount of trichomadesis, affect and disturb teacher and normally work and live.

5, to the harm of ear: chalk dust enters external auditory meatus, be mixed in sebum, can ceruminal plug be formed, if like this for a long time, the generation of ear inflammation can be caused.

Present stage for the treatment of several schemes of chalk dust to harm problem is:

1. load battery in blackboard eraser box, for small-sized fans provides power, utilize fan turns dust adsorption, dust is entered in dust collecting box by filter screen, and periodic cleaning dust collecting box, this scheme has fully used the limited inner space of blackboard eraser to make meticulous design, collection for dust is comparatively effective, but internal structure is comparatively complicated, light not, and cost is slightly high.

2. add side shield in blackboard eraser both sides, prevent not having absorbed dust directly to spill in air on a small quantity, add the effect of dedusting, the side of this scheme is worked as plate design and is adopted an original approach, but still there is high in cost of production problem.

3. blackboard eraser employs the loose cloth of band pore, and reserve at back and inflate mouth, when in blackboard eraser, dust runs up to a certain degree, with inflator with inflate mouth and be connected, extract dust out, arrive clean object, this scheme is novel in design and very effective in the mode reclaiming dust and clean blackboard eraser, spry and light convenience, but dust can not be made completely effectively all to enter blackboard eraser inside.

4. the external structure of pair existing blackboard eraser improves, the detachable sulculus for accepting dust is loaded onto in blackboard eraser surrounding, when erasing the board, dust falls into sulculus, regularly pull down sulculus to clean, this scheme is simple to operate, with low cost, dexterous convenient, effectively can reduce the loss of dust, but fundamentally can not solve dust problem.

5. the duroplasts foam in former blackboard eraser is placed between the more level and smooth polyester fibre cotton in two pieces of surfaces (i.e. the cotton of terylene parcel); Cover the thinner soft sponge (soft sponge can reduce friction therebetween thus reduce wear) of two panels thereon, this conceptual design is precisely careful, mainly on material, carry out large improvement, provide rational solution for the actual conditions of existing blackboard eraser completely, can extend the service life of blackboard eraser, but dust removing effects is still obvious not; As from the foregoing, good device is not had to solve the health hazard of dust to teacher or student at present.

[summary of the invention]

For solving the problem, the utility model provides a kind of page turning blackboard device, and this device combination gear transmission, can be implemented in the back erasing blackboard of blackboard, environment-friendly high-efficiency, greatly reduce the harm that in erasing blackboard process, dust causes teacher and classmate.

The technical scheme that the utility model adopts is: a kind of page turning blackboard device, comprise support and be arranged on some pieces of blackboard pages in support, blackboard page is arranged in support by connecting axle, one end of connecting axle is provided with gear wheel, the gear wheel engaged transmission of adjacent two connecting axles, wherein a connecting axle one end is connected with for power input device, and the back side of described support is also provided with slidably blackboard eraser, is wiped the content realizing erasing blackboard page by Sliding blackboard.

Described connecting axle is arranged on the central axis of blackboard page, and the tow sides of blackboard page are can write region.

Described blackboard eraser is snapped in by two ends in chute that support is arranged and realizes sliding.

Described power input device is rocking handle.

Engaged transmission is realized by a pinion between the gear wheel of described adjacent two connecting axles.

Be provided with between described blackboard page and support and stop blackboard eraser gap.

Described support is provided with the crumb loading groove for collecting chalk bits.

Compared with prior art, page turning blackboard device of the present utility model, the positive and negative utilizing gear drive to realize all blackboard pages is changed simultaneously, simple to operate, only need rotational power input unit when we need erasing blackboard, forward blackboard page to the back side, then mobile blackboard is wiped and can be removed the writing on the blackboard that blackboard page is write, greatly can reduce front like this when erasing the board, the dust hiked up is to the health hazard of teacher or student, and structure simple designs is reasonable.

Further, connecting axle is arranged on the central axis of blackboard page, the tow sides of blackboard page are can write region, achieve when same space, it is double that blackboard can utilize area to realize, and utilize the feature of page turning, ready-made writing on the blackboard can be kept at the blackboard back side by us, avoid because blackboard area is not enough and wipe useful writing on the blackboard.

Further, be provided with between blackboard page and support and stop blackboard eraser gap, by rational structural design, do not need to rest in this gap during activity at blackboard eraser.

Further, engaged transmission is realized by arranging a pinion between the gear wheel of adjacent two connecting axles, rotating in same direction while achieving all blackboard pages.

Further, support being provided with the crumb loading groove for collecting chalk bits, the dust of erasing being concentrated in the groove of the support bottom blackboard, focusing on, health environment-friendly.

[accompanying drawing explanation]

Fig. 1 is structural representation of the present utility model;

Wherein: 1-blackboard eraser, 2-gear wheel, 3-pinion, 4-power input device, 5-connecting axle, 6-blackboard page, 7-support.

[detailed description of the invention]

Below in conjunction with accompanying drawing, the utility model is described in detail:

See Fig. 1, a kind of page turning blackboard device, the some pieces of blackboard pages 6 comprising support 7 and be arranged in support 7, blackboard page 6 is arranged in support by connecting axle 5, connecting axle 5 is arranged on the central axis of blackboard page 6, the tow sides of blackboard page 6 are can write region, is provided with and stops blackboard eraser 1 gap between blackboard page 6 and support 7.One end of connecting axle 5 is provided with gear wheel 2, gear wheel 2 engaged transmission of adjacent two connecting axles 5, wherein connecting axle 5 one end is connected with for power input device 4, the back side of support 7 is also provided with slidably blackboard eraser 1, blackboard eraser 1 adopts strip structure to design, the side that blackboard page 6 pressed close to by blackboard eraser 1 is provided with sponge, and blackboard eraser 1 is snapped in the chute of setting on support 7 by two ends and realizes sliding, and wipes by Sliding blackboard the content that 1 realizes erasing blackboard page 6; Support 7 is also provided with the crumb loading groove for collecting chalk bits.

As preferred embodiment, in the present embodiment, 5 pieces of blackboard pages 6 have been arranged side by side in support 7, wherein four Block Paging blackboards are linked with four gear wheels 2 respectively by linking axes 5, engaged transmission is realized by a pinion 3 between the gear wheel 2 of adjacent two connecting axles 5, rotating in same direction while achieving all blackboard pages 6, and the blackboard page 6 being positioned at centre is directly connected with power input device 4, realize the reasonable input of rotatory force, power input device 4 is rocking handle, can realize blackboard page 6 overturn by rotation crank.

As preferred embodiment, blackboard page 6 is horizontally set in support 7, and blackboard eraser 1 is vertically arranged in support 7.

This device operating procedure is as follows: one, first erect by blackboard, and shake hand makes blackboard page 1 in one plane 4, conveniently writes writing on the blackboard.Two, after a plate face is write and expired, only hand can need be continued shake 180 degree to write overleaf.If the writing on the blackboard at three back sides has not been used, then only need the blackboard eraser 1 at the mobile back side that is erasable, this has wanted to absorb chalk dust compared with normal blackboard, chalk dust can be concentrated in the groove in support 7 simultaneously, and finally unified process, convenient and simple.

The utility model structure is simple, easy to operate, and vitals adopts standardized element, safe and reliable, have employed manual mode both laborsaving, saves space, and save electricity, very environmental protection again, the manual page turning of blackboard to complete page turning action by which kind of transmission mechanism.Gear transmission efficiency is high, is convenient to control, and volume is little, laborsaving, and be convenient to buying, the movement of blackboard eraser is realized by the transmission of bearing, and transmission efficiency is high, and each blackboard page and axle are ined succession, axle and gear are ined succession, complete between gear transmission, drive the upset of black half page.Bearing-transmission efficiency is high, is convenient to control, and volume is little.

Claims (10)

1. a page turning blackboard device, it is characterized in that: comprise support (7) and be arranged on some pieces of blackboard pages (6) in support (7), blackboard page (6) is arranged in support by connecting axle (5), one end of connecting axle (5) is provided with gear wheel (2), gear wheel (2) engaged transmission of adjacent two connecting axles (5), wherein a connecting axle (5) one end is connected with for power input device (4), the back side of described support (7) is also provided with slidably blackboard eraser (1), the content that (1) realizes erasing blackboard page (6) is wiped by Sliding blackboard.

2. a kind of page turning blackboard device according to claim 1, is characterized in that: described connecting axle (5) is arranged on the central axis of blackboard page (6), the tow sides of blackboard page (6) are can write region.

3. a kind of page turning blackboard device according to claim 1, is characterized in that: described blackboard eraser (1) is snapped in the upper chute arranged of support (7) by two ends and realizes sliding.

4. a kind of page turning blackboard device according to claim 1, is characterized in that: described power input device (4) is rocking handle.

5. a kind of page turning blackboard device according to claim 1, is characterized in that: realize engaged transmission by a pinion (3) between the gear wheel (2) of described adjacent two connecting axles (5).

6. a kind of page turning blackboard device according to claim 1, is characterized in that: be provided with between described blackboard page (6) and support (7) and stop blackboard eraser (1) gap.

7. a kind of page turning blackboard device according to claim 1, is characterized in that: described support (7) is provided with the crumb loading groove for collecting chalk bits.

8. a kind of page turning blackboard device according to claim 1, is characterized in that: described blackboard eraser (1) adopts strip structure design, and the side that blackboard page (6) pressed close to by blackboard eraser (1) is provided with sponge.

9. a kind of page turning blackboard device according to claim 1, is characterized in that: described blackboard page (6) is horizontally set in support (7), and blackboard eraser (1) is vertically arranged in support (7).

10. a kind of page turning blackboard device according to claim 1, is characterized in that: be provided with 5 pieces of blackboard pages (6) in described support (7).