CN2352369Y - Hong holder blackboard eraser - Google Patents

Abstract

The utility model relates to a long arm blackboard brush, belonging to the technical field of manufacture of teaching aids. The advantages of blackboard brushes and ferules are combined by the utility model. A blackboard brush and a ferule are respectively used by teachers in class, and the blackboard brush is combined with the ferule by students after class so that dwarf students can erase any corner of a blackboard. Unsafe accidents are reduced, and students are avoided from sucking more chalk dust. The utility model has the advantages of simple structure, convenient operation, beautiful appearance and good taste.

Description

Long-armed blackboard brush

The utility model is a blackboard brush and the combining of teacher's pointer, and belongs to the teaching aids making technical field.

At present, in the most zoned school of China, still use fixedly blackboard during teaching, write, erase with blackboard brush with chalk.Though the teacher uses blackboard brush more convenient, for the student on duty of primary school, also there is such shortcoming in a particularly short student on duty, is taking stool and is going to erase the board, and has wiped a place and has moved stool and wipe, and is so very inconvenient, also occurs dangerous accident easily.In addition, because facial too near apart from blackboard.Chalk dust enters respiratory tract easily, influences student's physical and mental health.Though erased the board originally is minor matter, and its purpose is to cultivate the student from liking working for a short time, actively the custom of doing things for collective of class.Like this, make some student forbidding, student's enthusiasm can not get sufficient transfer.

The purpose of this utility model has remedied the deficiencies in the prior art, and a kind of long-armed blackboard brush of conveniently tearing duty open is provided, and the while is favourable student's physical and mental health also.

The purpose of this utility model realizes by following technical measures.

The utility model is made up of band link blackboard brush, sleeve, teacher's pointer, and wherein the blackboard brush back is fixed with two links, and sleeve one end has the cylindricality crossbeam, and crossbeam can be stuck in the link, can rotate, but not come off, and bolt is arranged on the sleeve, and teacher's pointer can insert in the sleeve.

When using on the teacher classroom, use blackboard brush and teacher's pointer respectively, when the student uses after class, teacher's pointer is inserted sleeve than small end, the screwed in place bolt just can use.After using up, looser a bolt, take out teacher's pointer.

The utility model is simple in structure, and is simple to operate, easy to use, elegant in appearance, and favourable teachers and students' physical and mental health.

Following drawings attached explanation:

Fig. 1 is the utility model blackboard brush schematic rear view.

Fig. 2 is the utility model sleeve schematic diagram.

Fig. 3 is the supporting teacher's pointer schematic diagram of the utility model.

Fig. 4 is the complete schematic diagram of the utility model.

What sequence number 1 was made comments and instructions among Fig. 1 is the rubbing surface of blackboard brush, adopts prior art get final product, and what sequence number 2 was indicated is link, and two links occupy center, the blackboard brush back side, apart 2 centimetres of two links, 0.6 centimetre of link internal diameter, 0.7 centimetre of link external diameter.

What sequence number 3 was indicated among Fig. 2 is the sleeve crossbeam, long 2.6 centimetres of crossbeam, and diameter is 0.5 centimetre, what sequence number 4 was indicated is bolt, and screw diameter is 0.3 centimetre, and what sequence number 5 was indicated is bobbin, the bobbin internal diameter is 1.55 centimetres, and external diameter is 1.8 centimetres, and length is 1.3 centimetres.

Fig. 3 is a teacher's pointer, is shaped as taper, is 1.5 centimetres than the small end diameter, is 1.7 centimetres than outside diameter, and total length is 65 centimetres.

Above material is all made with plastics except that rubbing surface.

Claims (4)

1, a kind of long-armed blackboard brush (Fig. 4) is made up of band link blackboard brush (Fig. 1), sleeve (Fig. 2), teacher's pointer (Fig. 3).It is characterized in that the center design of the blackboard brush back side has two fixing links (among Fig. 1 2), and a cylindricality crossbeam is arranged on the sleeve, beam design is in two links, and there is a location bolt (among Fig. 2 4) at sleeve 1/2 place, teacher's pointer than the small end design in the bobbin of sleeve.

2, long-armed blackboard brush according to claim 1 is characterized in that, the blackboard brush of band link is made up of blackboard brush and link, and link is fixed on center, the blackboard brush back side, and two links are at a distance of 2 centimetres.

3, long-armed blackboard brush according to claim 1 is characterized in that, sleeve is made up of bobbin, crossbeam, bolt, and crossbeam is fixed on the bobbin top, and bobbin hangs down and really divides crossbeam equally.The bolt design is at bobbin 1/2 place.

4, according to claim 1, it is characterized in that teacher's pointer is fixed in the bobbin by bolt than small end.