CN2345370Y

CN2345370Y - Eraser

Info

Publication number: CN2345370Y
Application number: CN 98217816
Authority: CN
Inventors: 谢跃平
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-29
Filing date: 1998-07-29
Publication date: 1999-10-27
Anticipated expiration: 2008-07-29

Abstract

The utility model relates to a blackboard eraser. The utility model realizes the purpose that chalk dust is stored and sealed in a casing. The utility model is mainly composed of the casing and one or a plurality of eraser strips. Both ends of each eraser strip are respectively provided with an installing hole, the installing holes are respectively provided with a shaft head, and the shaft heads are installed on the casing. The casing is provided with a brush contacted with the eraser strips. A hollow cavity is arranged in the casing, and the lower part of the hollow cavity is provided with a dust collecting cavity. A dust guiding sheet is arranged under the eraser strips and the brush, and the lower end of the casing is provided with a dust discharging opening. The eraser strips are rolled from left to right in a reciprocating way, chalk dust is adsorbed on the eraser strips, the chalk dust is brushed down by the brush, the chalk dust is sent to the dust collecting cavity by dead weight or by the suction of a blower so that the chalk dust is not flown outwards, and environment is prevented from being polluted. The utility model is beneficial to the health of human bodies.

Description

Blackboard eraser

The utility model belongs to teaching aid, relates to a kind of blackboard eraser.

The present blackboard eraser that uses is to be fixedly mounted on the solid shell plates by wiping part, and dust from flying contaminated environment when erasing the board diminishes numerous teachers and students' health.

The purpose of this utility model is the shortcoming at existing product, the blackboard eraser that dust can outwards not fly upward when designing a kind of erasing the board.

For achieving the above object, adopt technical scheme as follows:

The wiping part of this blackboard eraser is made up of one or several wiping bar, and every to wipe the bar two ends porose, equipped with the spindle nose that is contained on the blackboard eraser housing respectively; Wiping the bar rear side, on the blackboard eraser housing hairbrush is housed, the burr of hairbrush contacts with wiping the bar surface, Packed cavity in the blackboard eraser housing, the cavity bottom is a cinder catcher, in the cinder catcher lower end ash discharging hole with cover is arranged.

Advantage of the present utility model:

When on blackboard, wiping letter written with chalk with this blackboard eraser; wiping bar comes rollback moving on blackboard surface; its dust is adsorbed on the wiping bar; by hairbrush down dust brush on it; dust enters in the cinder catcher by deadweight or with the power suction then; can prevent effectively that dust from flying upward to external diffusion, protection environmental sanitation, favourable teachers and students' health.

The drawing explanation: Fig. 1 is the schematic perspective view of this programme; Fig. 2 is for wiping bar structure assembling schematic diagram; Fig. 3 is for wiping the axial section schematic diagram of the spacing spindle nose of bar; Fig. 4 is the B-B generalized section of Fig. 3; Fig. 5 wipes moving schematic diagram back and forth for wiping bar on blackboard; Fig. 6 is the A-A generalized section of Fig. 1 of embodiment 1; Fig. 7 is the A-A generalized section of Fig. 1 of embodiment 2;

Further specify technical scheme and embodiment with reference to accompanying drawing:

As shown in Figure 1, this blackboard eraser is from only seeing housing 6, three ends of wiping bar 2 and dust-leading board 4 in appearance; Fig. 2 represents to wipe bar 2 and is assemblied in structural representation on the blackboard eraser housing 6.Be contained in the spindle nose 1 and 3 on the housing 6, be contained in respectively in the hole of wiping bar 2 two ends.Wherein the cylindrical spindle nose of an end is equipped with the circular hole of wiping bar one end, other end spindle nose as shown in Figure 3, constitute by spindle nose core 22 and limited block 23, limited block is fixedly mounted on the housing 6, the lower end of spindle nose core 22 is square or other non-geometry of the circle shapes, match with wiping bar 2 one end same geometry holes, this end is wiped bar and the spindle nose core can not relatively rotate, driving the spindle nose core when wiping the bar rolling rotates synchronously, spindle nose core top has projection C to be assemblied in the hole of limited block 23 as shown in Figure 3 and Figure 4, be provided with two position-limited edge D, E in this hole, can block mutually with the dual side-edge of projection C respectively.The spacing angle that spindle nose core 22 rotates in limited block 23 holes can be selected arbitrarily, for example 180 ° or 150 ° etc.As shown in Figure 5, spindle nose core rotary spacing angle is 180 °, Fig. 5 (a) expression is wiped bar 2 along clockwise 24 the original position of erasing the board of rolling, Fig. 5 (b) is rolled to 90 ° position for wiping bar 2 along clockwise, Fig. 5 (c) is for to be rolled to 180 ° along clockwise, make the position-limited edge D of limited of projection C one side block the location, can not continue to roll along clockwise again; At this moment, wiping bar 2 beginnings rolls along anticlockwise, Fig. 5 (d) is the position that is rolled to 90 ° along anticlockwise, in like manner, is rolled to 180 ° along anticlockwise, the limited limit E of another side of projection C blocks the location, can not continue again to roll, and change into again, like this along the clockwise abrasive tumbling, abrasive tumbling back and forth about wiping bar and going round and beginning again is until clean with blackboard eraser.

Example 1:

As shown in Figure 6, wiping bar 2 and hairbrush 5 is installed on the blackboard eraser housing 6, cavity 7 is arranged in housing 6, the bottom is a cinder catcher 9, on cinder catcher, be provided with two inclination shape dust-leading

boards

8 and 4 that intersection is settled, have the gap between two dust-leading boards, so that dust enters cinder catcher from gap location, dust-leading board 4 front ends extend outside housing wipes the outside, bar 2 lower ends.In the cinder catcher lower end ash discharging hole 10 is arranged.Wipe structure annexations such as bar and hairbrush as mentioned above.

Example 2:

As shown in Figure 7, a miniature fan 17 is housed in the cavity 7 of housing 6, it comprises little shape motor 18 and impeller 19, gives little shape motor power supply by chargeable battery 13; Between miniature fan and wiping bar hairbrush conical dust gathering arrester 12 is arranged, the cover mouth docks with fans entrance, and the chalk dust that dust gathering arrester is collected can be rotated blower fan at a high speed and suck, and the dust guiding tube 21 that warp is connected with blower fan is sent into cinder catcher 9; The net 15 of Chalk-dust filtering is housed in the outside of miniature fan 17; Venthole 16 is arranged on housing 6; Attaching plug 11, power switch 14 and dust-collecting cavity 20 also are set on housing.Other structure is all identical with example 1.

Claims

1. blackboard eraser comprises housing and the wiping part that is installed on the housing, and it is characterized in that wiping part is one or several wiping bar (2) composition, and wiping the bar two ends for every all has installing hole, is contained in spindle nose (1), (3) on the housing (6) respectively; Rear side wiping bar (2) is equipped with hairbrush (5) on the housing (6), the hairbrush burr contacts with the wiping bar; Cavity (7) is arranged in housing (6), cinder catcher (9) is arranged in the cavity bottom; Ash discharging hole (10) is arranged in the cinder catcher lower end; Below wiping bar and hairbrush, lead dirt sheet (4), (8).

2. blackboard eraser according to claim 1 is characterized in that being contained in every and wipes bar (2) two ends by spindle nose (1), (3) in the dress hole, and wherein the cylindrical spindle nose of an end is joined wiping bar circular hole; Other end spindle nose is made of spindle nose core (22) and limited block (23); Limited block is fixedly mounted on the housing (6), spindle nose core (22) lower end is square or other non-geometry of the circle shapes, the wiping bar stomidium identical with shape is equipped, be provided with the spindle nose core top of projection (C), be assemblied in the hole of limited block (23), this hole is provided with two position-limited edges (D) (E), and the dual side-edge with projection (C) blocks mutually respectively.

3. blackboard eraser according to claim 1 and 2, it is characterized in that in the cavity (7) of housing (6) miniature fan (17) being housed, form by Blower Housing, little shape motor (18) and impeller (19), chargeable battery (13) is powered to motor (18), attaching dust guiding tube road (21) on the Blower Housing, cinder catcher (9) is connected in the dust guiding tube road; Between the porch of the rear side of wiping bar (2) and hairbrush (5) and miniature fan (17), there is conical dust gathering arrester (12) to be installed on the housing (6); Around miniature fan, there is screen pack (15) to be contained on the housing (6); On housing (6), be provided with venthole (16).