阅读说明：本技术 机械式自动吸尘黑板擦 (Mechanical automatic dust-absorbing blackboard eraser ) 是由 周典银 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种机械式自动吸尘黑板擦,包括安装板,所述安装板一侧设置有清洁层,且该侧对称开设有一对转动槽,所述转动槽内通过转动轴转动安装有转动轮,两个所述转动轴之间固定连接有往复丝杆,所述板体中部开设有滑动腔,所述滑动腔内滑动配置有滑块,所述滑块螺纹套设于所述往复丝杆上,所述安装板内还开设有条形腔,所述滑块靠近条型腔的一侧固定连接有第一磁体,所述条型腔内密封滑动配置有第二磁体,且通过第二磁体分为两个独立的压力腔,所述第一磁体和第二磁体相互靠近的一侧磁极相反,所述安装板设置有清洁层的侧面两侧均开设有吸尘口。通过两个相反抽吸动作的配合,实现了不间断的吸气动作,从而降低了灰尘飞扬的情况。(The invention discloses a mechanical automatic dust-absorbing blackboard eraser which comprises a mounting plate, wherein a cleaning layer is arranged on one side of the mounting plate, a pair of rotating grooves are symmetrically formed in the side of the mounting plate, rotating wheels are rotatably mounted in the rotating grooves through rotating shafts, a reciprocating screw rod is fixedly connected between the two rotating shafts, a sliding cavity is formed in the middle of the plate body, a sliding block is arranged in the sliding cavity in a sliding mode, the sliding block is sleeved on the reciprocating screw rod in a threaded mode, a strip-shaped cavity is further formed in the mounting plate, a first magnet is fixedly connected to one side, close to the strip-shaped cavity, of the sliding block, a second magnet is arranged in the strip-shaped cavity in a sealing and sliding mode, the sliding block is divided into two independent pressure cavities through the second magnet, the magnetic poles of the side, close to each other, of. Through the cooperation of the two opposite suction actions, uninterrupted suction action is realized, so that the condition of flying dust is reduced.)

1. The mechanical automatic dust absorption blackboard eraser comprises a mounting plate (1) and is characterized in that a cleaning layer (2) is arranged on one side of the mounting plate (1), a pair of rotating grooves are symmetrically formed in the side of the mounting plate (1), rotating wheels (3) are rotatably mounted in the rotating grooves through rotating shafts (4), two reciprocating lead screws (5) are fixedly connected between the rotating shafts (4), sliding cavities (6) are formed in the middle of the blackboard body, sliding blocks (7) are arranged in the sliding cavities (6) in a sliding mode, the sliding blocks (7) are sleeved on the reciprocating lead screws (5) in a threaded mode, strip-shaped cavities are further formed in the mounting plate (1), one sides, close to the strip-shaped cavities, of the sliding blocks (7) are fixedly connected with first magnets (8), second magnets (9) are arranged in the strip-shaped cavities in a sealing and sliding mode, and the strip-shaped cavities are divided, the magnetic poles of one side, close to each other, of the first magnet (8) and the second magnet (9) are opposite, dust suction openings (11) are formed in two sides, provided with the cleaning layer (2), of the side face of the mounting plate (1), the dust suction openings (11) are communicated with two ends of the strip-shaped cavity through two connecting cavities (12), first one-way valves (13) only leading to the strip-shaped cavity are arranged in the connecting cavities (12), air outlets are formed in two ends of the strip-shaped cavity, and second one-way valves (14) only leading to the outside are arranged in the air outlets.

2. The mechanical automatic dust collection blackboard eraser as claimed in claim 1, wherein the air outlet is located right above the rotating wheel (3), a filter screen (15) is arranged inside the air outlet, a plurality of third magnets (16) are embedded inside the rotating wheel (3), the plurality of third magnets (16) are uniformly distributed along the circumferential direction of the rotating wheel (3), and a fourth magnet (17) is fixedly mounted in the middle of the filter screen (15).

3. The mechanical automatic dust suction blackboard eraser as claimed in claim 2, characterized in that the adjacent two third magnets (16) have opposite magnetic poles.

4. The mechanical automatic dust-absorbing blackboard eraser as claimed in claim 2 or 3, characterized in that a metal needle (18) is further disposed between the rotating wheel (3) and the filter screen (15), the metal needle (18) is parallel to the axis of the rotating wheel (3), and both ends of the metal needle are pointed ends.

5. The mechanical automatic dust-absorbing blackboard eraser as claimed in claim 1, wherein a rubber layer is sleeved on the outer ring of the rotating wheel (3), and the outer ring of the rubber layer is provided with anti-skid lines.

Technical Field

The invention belongs to the technical field of blackboard erasers, and particularly relates to a mechanical automatic dust collection blackboard eraser.

Background

At present, when the blackboard eraser used in schools is used for erasing a blackboard, dust flies, the classroom environment is polluted, and the body health of teachers and students is seriously affected.

In order to solve the above problems, various blackboard erasers with dust collection function have been proposed in the prior art; however, most of the blackboard erasers adopt a motor as a driving source, so that the blackboard erasers are high in use cost and generate certain noise during working.

Meanwhile, the dust absorption principle of the blackboard eraser is that dust is absorbed into the blackboard eraser through air circulation, a filter screen is generally arranged at an air outlet in order that air can flow out from the blackboard eraser and dust cannot float out, but the dust absorption blackboard eraser adopting the principle is easy to cause the blockage of the filter screen in the using process, so that the filter screen is required to be cleaned regularly, and time and labor are wasted; meanwhile, the flow efficiency of the gas is also affected, and the dust suction effect is further affected.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a mechanical automatic dust collection blackboard eraser.

The invention provides a mechanical automatic dust-absorbing blackboard eraser, which comprises a mounting plate, wherein a cleaning layer is arranged on one side of the mounting plate, a pair of rotating grooves are symmetrically formed in the side of the mounting plate, rotating wheels are rotatably mounted in the rotating grooves through rotating shafts, a reciprocating screw rod is fixedly connected between the two rotating shafts, a sliding cavity is formed in the middle of the plate body, a sliding block is arranged in the sliding cavity in a sliding manner, the sliding block is sleeved on the reciprocating screw rod in a threaded manner, a strip-shaped cavity is further formed in the mounting plate, a first magnet is fixedly connected to one side of the sliding block close to the strip-shaped cavity, a second magnet is arranged in the strip-shaped cavity in a sealing and sliding manner, the sliding block is divided into two independent pressure cavities through the second magnet, the magnetic poles of the first magnet and the second magnet at the side close to each other are opposite, dust-absorbing openings are formed in both, the connecting cavity is internally provided with a first one-way valve which only leads to the strip cavity, the two ends of the strip cavity are also provided with air outlets, and second one-way valves which only lead to the outside are arranged in the air outlets.

Preferably, the gas outlet is in directly over the rotation wheel, and inside configuration has the filter screen, rotate the inside a plurality of third magnets that are equipped with of wheel, a plurality of third magnets are along rotating wheel circumference evenly distributed, filter screen middle part fixed mounting has the fourth magnet.

Preferably, the magnetic poles of two adjacent third magnets are distributed oppositely.

Preferably, still be equipped with the metal needle between rotation wheel and the filter screen, the metal needle is parallel with rotation wheel axis, and both ends are most advanced.

Preferably, a rubber layer is sleeved on the outer ring of the rotating wheel, and anti-skid grains are arranged on the outer ring of the rubber layer.

Compared with the prior art, the invention has the beneficial effects that:

1. when the volume in the pressure cavity is increased, external air is sucked in through the dust suction port, and when the volume in the pressure cavity is reduced, air is discharged through the air outlet, so that unidirectional air flow is formed, dust on one side of the cleaning layer is sucked into the pressure cavity, the two pressure cavities have opposite change trends, and through the matching of two opposite suction actions, uninterrupted suction action is realized, so that the flying condition of the dust is greatly reduced;

2. the third magnet and the fourth magnet have attraction or repulsion acting force, and the distance between the fourth magnet and the third magnet fluctuates in the process that the rotating wheel rotates continuously, so that the acting force applied to the fourth magnet also fluctuates, and the vibration of the filter screen is further caused, so that dust attached to the filter screen can fall off, the filter screen is kept smooth, and the gas circulation efficiency is further kept;

3. at the pivoted in-process of rolling the wheel, the relative cutting magnetic induction line motion of doing of metal needle to accumulate the electric charge at both ends, according to the most advanced principle of discharging, the both ends release electric field of metal needle, and the electric field has the adsorption affinity to slight dust, and then makes the dust on the filter screen attracted, can drop from the filter screen more easily.

Drawings

Fig. 1 is a schematic side view of a mechanical automatic dust-absorbing blackboard eraser according to the present invention;

fig. 2 is a schematic side view of a mechanical automatic dust-absorbing blackboard eraser according to the present invention;

fig. 3 is an enlarged view of a structure a in fig. 1.

In the figure: the device comprises a mounting plate 1, a cleaning layer 2, a rotating wheel 3, a rotating shaft 4, a reciprocating screw rod 5, a sliding cavity 6, a sliding block 7, a first magnet 8, a second magnet 9, a pressure cavity 10, a dust suction port 11, a connecting cavity 12, a first check valve 13, a second check valve 14, a filter screen 15, a third magnet 16, a fourth magnet 17 and a metal needle 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a mechanical automatic dust-absorbing blackboard eraser comprises a mounting plate 1, a cleaning layer 2 is arranged on one side of the mounting plate 1, a pair of rotating grooves are symmetrically arranged on the side, rotating wheels 3 are rotatably arranged in the rotating grooves through rotating shafts 4, a reciprocating screw 5 is fixedly connected between the two rotating shafts 4, a sliding cavity 6 is arranged in the middle of the blackboard body, a sliding block 7 is arranged in the sliding cavity 6 in a sliding manner, the sliding block 7 is sleeved on the reciprocating screw 5 in a threaded manner, a strip-shaped cavity is also arranged in the mounting plate 1, a first magnet 8 is fixedly connected on one side of the sliding block 7 close to the strip-shaped cavity, a second magnet 9 is arranged in the strip-shaped cavity in a sealing and sliding manner, the sliding block is divided into two independent pressure cavities 10 through the second magnet 9, the magnetic poles of one side of the first magnet 8 close to, the dust suction port 11 is respectively communicated with two ends of the strip-shaped cavity through two connecting cavities 12, a first one-way valve 13 which only leads to the strip-shaped cavity is arranged in the connecting cavity 12, air outlets are also formed in two ends of the strip-shaped cavity, and a second one-way valve 14 which only leads to the outside is arranged in the air outlets;

in the embodiment applying the technical scheme, when a user uses the blackboard eraser, the blackboard eraser can slide left and right in a reciprocating manner to a large extent; when the blackboard eraser is used, the blackboard eraser is slid along the rotatable direction of the rotating wheel 3, and then in the process of erasing the blackboard, because friction force exists between the rotating wheel 3 and the blackboard, the rotating wheel 3 rotates, and then the rotating shaft 4 drives the reciprocating screw rod 5 to rotate, so that the sliding block 7 slides in a reciprocating manner in the sliding cavity 6, and further drives the first magnetic block to synchronously slide in a reciprocating manner, and due to the magnetic attraction acting force, the first magnetic block drives the second magnetic block to hermetically slide in the bar-shaped cavity in a reciprocating manner, so that the volume change of the two pressure cavities 10 is caused, and the change trends are opposite;

when the volume in the pressure cavity 10 is increased, external air is sucked in through the dust suction port 11, when the volume in the pressure cavity 10 is reduced, air is discharged through the air outlet, one-way air flow is formed, dust on one side of the cleaning layer 2 is sucked into the pressure cavity 10, the two pressure cavities 10 have opposite change trends, and through the matching of two opposite suction actions, uninterrupted suction action is realized, so that the flying condition of the dust is greatly reduced.

According to the preferable technical scheme in the embodiment, the air outlet is positioned right above the rotating wheel 3, the filter screen 15 is arranged in the air outlet, the plurality of third magnets 16 are embedded in the rotating wheel 3, the plurality of third magnets 16 are uniformly distributed along the circumferential direction of the rotating wheel 3, and the middle part of the filter screen 15 is fixedly provided with the fourth magnet 17; specifically, an attractive or repulsive acting force exists between the third magnet 16 and the fourth magnet 17, and in the process of continuous rotation of the rotating wheel 3, the distance between the fourth magnet 17 and the third magnet 16 fluctuates, so that the acting force applied to the fourth magnet 17 also fluctuates, and further the vibration of the filter screen 15 is caused, so that dust attached to the filter screen 15 can fall off, the filter screen 15 is kept smooth, and further the gas circulation efficiency is kept; in a further preferable technical scheme, the magnetic poles of two adjacent third magnets 16 are distributed oppositely, and then the fourth magnets 17 are alternately attracted and repelled in the rotating process of the rotating wheel 3, so that the vibration amplitude of the filter screen 15 can be increased, and the dust shaking-off effect is improved.

In the optional technical scheme in this embodiment, a metal needle 18 is further disposed between the rotating wheel 3 and the filter screen 15, the metal needle 18 is parallel to the axis of the rotating wheel 3, and both ends of the metal needle are pointed ends; specifically, in the process that the rotating wheel 3 rotates, the metal needle 18 relatively does cutting magnetic induction line motion to accumulate electric charges at two ends, and according to the point discharge principle, the electric field is released at two ends of the metal needle 18, and the electric field has adsorption force on fine dust, so that the dust on the filter screen 15 is attracted, and the dust can be more easily dropped from the filter screen 15.

In the optional technical scheme in the embodiment, a rubber layer is sleeved on the outer ring of the rotating wheel 3, and anti-skid grains are arranged on the outer ring of the rubber layer; the friction force between the rotating wheel 3 and the surface of the blackboard is increased through the design, so that the blackboard eraser can rotate better when sliding on the blackboard, and the situation that the blackboard eraser slides without rotating is avoided.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the invention.