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Dokumentenidentifikation EP1479530 30.12.2004
EP-Veröffentlichungsnummer 0001479530
Titel Schnurloser Auswischer und Staubsammler für Wandtafel
Anmelder Fan, Chen-Lang, Junghe City, Taipeh/T'ai-pei, TW
Erfinder Fan, Chen-Lang, Junghe City, Taipei, TW
Vertreter derzeit kein Vertreter bestellt
Vertragsstaaten AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LI, LU, MC, NL, PT, RO, SE, SI
Sprache des Dokument EN
EP-Anmeldetag 19.05.2003
EP-Aktenzeichen 030113526
EP-Offenlegungsdatum 24.11.2004
Veröffentlichungstag im Patentblatt 30.12.2004
IPC-Hauptklasse B43L 21/02

Beschreibung[en]
FIELD OF THE INVENTION

The present invention relates to a kind of wireless blackboard eraser and dust collector. When using the machine to erase blackboards or the like, the air blower inside the shell will suck in the dust particles, so as to prevent them from flying away.

PRIOR ART

Generally speaking, most teaching places are equipped with backboard or whiteboard for the teacher to write down the text or to make explanations. In some occasions, pencils or whiteboard-writing pens are used for writing on whiteboards. But pencils and whiteboard-writing pens often contain volatilizable and poisonous organic solvents, which do much harm to human bodies. In other places chalks are used. The chalk dusts adhere on the blackboard, and with the motion of the eraser, drop down and fly away all around, making the ambient space filled with chalk dusts. This is also very harmful to the teachers and learners, especially, the young children. Since using chalks and common blackboard erasers causes lots of flying dusts, it is not good to the health and inconvenient for teaching, and is often criticized by the teachers.

DESCRIPTION OF THE INVENTION

The present invention provides a kind of wireless blackboard eraser and dust collector, which is composed of a shell body, an air blower, and an erasing plate set. The air blower is installed inside the shell body and the erasing plate is set under the shell body. The eraser shell consists of a piece of erasing cloth, a piece of air-permeable sponge, a base plate and a group of air-permeable papers.

The present invention installs an air blower inside the shell body and an erasing plate set, which is permeable for the air but not for the dusts, at the bottom of the shell, thus finally completes a blackboard eraser and dust collector. When using the machine to erase blackboards or the like, the air blower inside the shell will suck in the dust particles, so as to prevent them from flying away and avoid the harm to human bodies.

BRIEF DESCRIPTION OF THE DRAWINGS

  • Fig. 1: Diagonal view of the present invention
  • Fig. 2: Exploded view of the present invention
  • Fig. 3: Partial sectional drawing of the present invention
  • Fig. 4: Cross-sectional side view of the present invention
  • Fig. 5: Diagonal view of cleaning the present invention

DETAILED DESCRIPTION OF THE EMBODIMENTS

The representative drawing of the present invention is Figure 1.

In figure 1, (1 ) stands for blackboard eraser and dust collector, (10) for shell, (13) for battery cover, (122) for power switch, and (30) for erasing plate set.

As shown in Figures 1 - 4, the blackboard eraser and dust collector (1) consists of a shell body (10), an air blower (20), and an erasing plate set (30).

As shown in Figures 2 and 3, the shell body (10) is divided into the left shell (11) and the right shell (12), which are in symmetry with each other. Inside the left shell (11) there is a battery seat (111) for placing battery (112), and on the exterior surface of the right shell (12) is an opening (121) for installing or mounting a power switch (122) thereto. The air blower (20) is composed of a motor (21) and a fan (22).

The erasing plate set (30) is composed of a piece of erasing cloth (31), a piece of air-permeable sponge (32), a base plate (33), and an air-permeable paper group (34), which are overlapped in sequence. On the erasing cloth (31) there are many regular small pores (311). The sponge (32) is permeable for the air but not for the dusts. On the base plate (33) there are multiple irregular holes (331) for air to flow. The air-permeable paper group is composed of the air-permeable papers (341), which are folded into a form of stereo saw tooth, and a frame (342) installed around.

Referring to Figures 2 - 4, a method for assembly and use of the erase is now described. Firstly, the air blower (20) is installed inside the left shell (11) and the battery (112) is placed in the battery seat (111). Then, the right shell (12) is installed together with the left shell (11) and the battery cover (13) is placed on the back of the left and right shells (11) and (12). Secondly, the erasing cloth (31) is plastered onto the air-permeable sponge piece (32) and both are attached onto one surface of the base plate (33); following the air-permeable paper group (34) is placed on the other surface of the base plate (33), so as to finish the whole erasing plate set (30). Finally, the erasing plate set (30) is installed under the shell body (10), thus completely finish the blackboard eraser and dust collector (1).

As shown in Figures 3 and 4, when using the blackboard eraser and dust collector (1 ) to erase blackboard or the like, the user turns on the power switch (122), then the air blower (20) inside the blackboard eraser and dust collector (1) makes suction actions. Sucked in by the air blower (20), the dusts produced in the process of erasing will enter the air-permeable sponge piece (32) through the small pores (311 ) on the erasing cloth (31) of the erasing plate set (30). Among the dusts, the larger particles will remain inside the air-permeable sponge piece (32), and the smaller ones will directly enter the air-permeable papers (341) of the air-permeable paper group (34).

As shown in Figure 5, after the blackboard eraser and dust collector (1) finishes the work, some residual dusts will remain on the surface of the erasing cloth (31) and the sucked dusts will accumulate on the air-permeable sponge piece (32) and the air-permeable papers (341). At that time, the blackboard eraser and dust collector (1) can be moved to the placement groove (3) of the blackboard eraser cleaner (2), and then the cleaner (2) will suck the dusts on the surface of the erasing cloth (31), the air-permeable sponge piece (32), and the air-permeable papers (341) into the interior of the cleaner (2), so as to clean the blackboard eraser and dust collector (1).

LIST OF REFERENCE NUMERALS

  • (1) Blackboard eraser and dust collector
  • (2) Blackboard eraser cleaner
  • (3) Placement groove
  • (10) Shell body
  • (11) Left shell
  • (111 ) Battery seat
  • (112) Battery
  • (12) Right shell
  • (121) Opening
  • (122) Power switch
  • (13) Battery cover
  • (20) Air blower
  • (21) Motor
  • (22) Fan
  • (30) Erasing plate set
  • (31) Erasing cloth
  • (311) Pore
  • (32) Air-permeable sponge piece
  • (33) Base plate
  • (331) Hole
  • (34) Air-permeable paper group
  • (341) Air-permeable papers
  • (342) Frame


Anspruch[en]
  1. Wireless blackboard eraser and dust collector (1) comprising a shell (10), an air blower (20), and an erasing plate set (30), wherein the air blower (20) is installed inside the shell body (10) and the erasing plate set (30) under the shell body (10), wherein the erasing plate set (30) consists of a piece of erasing cloth (31), a piece of air-permeable sponge (32), a base plate (33), and a group of air-permeable papers (34).
  2. Wireless blackboard eraser according to claim 1, wherein the erasing cloth (31) comprises many small pores (311 ).
  3. Wireless blackboard eraser according to claim 1 or 2, wherein the air-permeable paper group (34) is in a form of stereo saw teeth.






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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