CN2465954Y

CN2465954Y - Dust-collecting blackboard eraser

Info

Publication number: CN2465954Y
Application number: CN 01208535
Authority: CN
Inventors: 郭福军
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-28
Filing date: 2001-02-28
Publication date: 2001-12-19
Anticipated expiration: 2011-02-28

Abstract

The utility model relates to a dust collecting blackboard eraser which belongs to a teaching aid. Two arris frames and four position limiting baffle plates are cast at the inner side of an injection molding housing and are parallel to both edges of the housing. The upper end surface of the housing is provided with a through hole, and the upper end of a threaded rod of a fixing rack of an injection molding blackboard eraser is provided with threads. A blackboard eraser body is inlaid in a groove of the lower end surface of the fixing rack which is positioned at the middle of the position limiting baffle plates. The threaded rod passes through the through hole of the housing and is in thread connection with an upper gland inlaid with a spring. A brush is installed in grooves of the arris frames, and a dust collecting sheet is installed on one edge of the housing, and the edge of the housing does not correspond to the arris frames. The utility model has the advantages that the utility model prevents dust from flying and keeps environment clean, and the dust is collected when a blackboard is wiped.

Description

The formula of gathering dust blackboard eraser

The utility model relates to the formula blackboard eraser that gathers dust, and belongs to a kind of in the teaching aid.

In present teaching, usually use cotton felt formula blackboard eraser, there is dust tenesmus when erasing the board, contaminated air, teacher, student's respiratory tract are produced shortcomings such as harm, and the problem that electric dust absorption formula blackboard eraser has noise jamming, disperses attention of student, for this reason, I develop a kind of formula blackboard eraser that gathers dust.

The purpose of this utility model provides a kind of noiselessness, can prevent the formula of the gathering dust blackboard eraser that dust flies upward everywhere with dust with wiping with being received in the blackboard eraser cavity.

The technical solution of the utility model is: the inboard of the blackboard eraser housing of making in the one injection moulding, the parallel reeded rib bone of two bands that is cast with the housing both sides, four postive stop baffles, the housing upper surface has through hole, the screw rod upper end car of the blackboard eraser fixed mount that the one injection moulding is made has screw thread, the lower surface of blackboard eraser fixed mount is a groove, the blackboard eraser body is embedded in the lower surface groove of blackboard eraser fixed mount, the blackboard eraser fixed mount places the centre of several postive stop baffles, the through hole that the screw rod of blackboard eraser fixed mount passes housing and the upper press cover that studs with spring are to be threaded, hairbrush is installed in the groove of rib bone, the sheet that gathers dust is installed on one side of blackboard eraser housing of no rib bone correspondence, thereby constitutes the formula blackboard eraser that gathers dust.

Above-mentioned postive stop baffle can increase as required.

Above-mentioned rib bone also can be along three parallel castings in limit of housing, form the space of a sealing with the sheet that gathers dust, and dust is concentrated in the housing.

The above-mentioned sheet that gathers dust also can be made into integration with housing.

The utility model has the advantages that: 1. health hygienic: compare with common blackboard eraser, can prevent the dust pollution air with dust with wiping with being collected in the blackboard eraser cavity, it is healthy to influence teachers and students.2. structure is simple and clear, noiselessness.3. easy to use, can be according to the blackboard situation, the dynamics that decision applies when wiping word.4. inexpensive, cost is low.

Fig. 1 is the utility model overall structure and partial sectional view

Fig. 2 is the cutaway view of the utility model housing along the axis

Referring to Fig. 1, Fig. 2, the inboard of the blackboard eraser housing of making in the one injection moulding 3, the parallel reeded rib bone 32 of two bands that is cast with the both sides of housing 3, four postive stop baffles 31, housing 3 upper surfaces have through hole, the screw rod upper end car of the blackboard eraser fixed mount 4 that the one injection moulding is made has screw thread, blackboard eraser body 5 is embedded in the lower surface groove of blackboard eraser fixed mount 4, blackboard eraser fixed mount 4 places the centre of several postive stop baffles 31, the screw rod of blackboard eraser fixed mount 4 pass behind the through hole of housing 3 with the upper press cover 1 that studs with spring 2 to be threaded, hairbrush 7 is installed in the groove of rib bone 32, the sheet 6 that gathers dust is contained on one side of housing 3 no rib bone correspondences, thereby constitutes the formula blackboard eraser that gathers dust.

Because the effect of spring 2, blackboard eraser body 5 leaves blackboard surface, in use, a gather dust end of sheet 6 of installation is in the below, press upper press cover 1 with palm, make blackboard eraser body 5 contact blackboard surfaces, like this, in the process that erases the board, the hairbrush 7 on two limits in the cavity of housing 3, prevents flying upward of dust, simultaneously with dust collection, the dust that glides quilt during falling sheet 6 that gathered dust is hospitalized, and dust is collected along the inclination of the sheet 6 that gathers dust.

Above-mentioned postive stop baffle 31 can increase as required.

Above-mentioned rib bone 32 also can form the space of a sealing along three parallel castings in limit of housing 3, and dust is concentrated in the cavity of housing 3.

The above-mentioned sheet 6 that gathers dust also can be made into integration with housing 3.

Claims

1, the formula of gathering dust blackboard eraser, by blackboard eraser body (5), housing (3), hairbrush (7) constitutes, it is characterized in that: the inboard of the blackboard eraser housing of making in the one injection moulding (3), parallel two the rib bones (32) that have groove that are cast with the both sides of housing (3), four postive stop baffles (31), housing (3) upper surface has through hole, the screw rod upper end car of the blackboard eraser fixed mount (4) that the one injection moulding is made has screw thread, blackboard eraser body (5) is embedded in the lower surface groove of blackboard eraser fixed mount (4), blackboard eraser fixed mount (4) is positioned at the centre of four postive stop baffles (31), the through hole that the screw rod of blackboard eraser fixed mount (4) passes housing (3) and the upper press cover that studs with spring (2) (1) are to be threaded, hairbrush (7) is installed in the groove of rib bone (32), and the sheet that gathers dust (6) is installed on one side of the no rib bone of housing (3) correspondence.

2, the formula blackboard eraser that gathers dust as claimed in claim 1 is characterized in that: described postive stop baffle (31) can be polylith as required.

3, the formula blackboard eraser that gathers dust as claimed in claim 1 is characterized in that: described rib bone (32) also can be along three parallel castings in limit of housing (3).

4, the formula blackboard eraser that gathers dust as claimed in claim 1 is characterized in that: the described sheet that gathers dust (6) also can be cast with housing (3) one.