CN201769567U

CN201769567U - Blackboard eraser

Info

Publication number: CN201769567U
Application number: CN2010202053551U
Authority: CN
Inventors: 邵益民; 陈莉
Original assignee: HUAPING PRIMARY SCHOOL OF SHANGHAI MINXING AREA
Current assignee: HUAPING PRIMARY SCHOOL OF SHANGHAI MINXING AREA
Priority date: 2010-05-25
Filing date: 2010-05-25
Publication date: 2011-03-23
Anticipated expiration: 2020-05-25

Abstract

The utility model discloses a blackboard eraser, which comprises a box sleeve, a connecting block, racks, a spring and lock catches. The connecting block, the racks, the spring and the lock catch are mounted in the box sleeve, one end of the blackboard eraser is connected with the connecting block, side surfaces of the connecting block are respectively provided with a rack, each rack is provided with a lock catch matching with the rack, the lock catches are fixed on the box sleeve through fixing rods, the tail end of the connecting block is connected with one end of the spring, and the other end of the spring is fixed on the box sleeve. The blackboard eraser can be inserted into the box sleeve when not used and can extend out when required, the length of the blackboard eraser can be increased so as to erase the highest position of a blackboard, and then the blackboard eraser is simple in structure, convenient in operation, low in cost and high in practical value.

Description

Blackboard eraser

Technical field

The utility model relates to a kind of blackboard eraser.

Background technology

Blackboard eraser is the realia that we use always, but often all leaves a lot of chalk dusts on the blackboard eraser, and when we need erase the board eminence, short classmate may be just very painstaking simultaneously.

Summary of the invention

In order to address the above problem, the utility model provides a kind of blackboard eraser, blackboard eraser can be inserted the box cover in time spent not, needs the time spent to stretch again, can increase length again, clips the position of blackboard eminence.

A kind of blackboard eraser, comprise the box cover and be installed in interior contiguous block, tooth bar, spring and the snap close of box cover, described blackboard eraser one end connects a contiguous block, a tooth bar is respectively established in the side of described contiguous block, described tooth bar is provided with the snap close that matches with described tooth bar, and described snap close is fixed on box by fixed bar and puts; The terminal end that connects spring of described contiguous block, the described spring other end is fixed on box and puts;

On the described snap close button is installed, described box puts and is provided with the opening that matches with described button.

The beneficial effects of the utility model are: simple in structure, easy to operate, cost is low and practical value is high.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 1, a kind of blackboard eraser, comprise box cover 1 and be installed in box and overlap 1 interior contiguous block 4, tooth bar 2, spring 6 and snap close 5, described blackboard eraser 3 one ends connect a contiguous block 4, a tooth bar 2 is respectively established in the side of described contiguous block 4, described tooth bar 2 is provided with the snap close 5 that matches with described tooth bar 2, and described snap close 5 is fixed on the box cover 1 by fixed bar 7; Described contiguous block 4 terminal ends that connect spring 6, described spring 6 other ends are fixed on the box cover 1; On the described snap close 5 button is installed, described box cover 1 is provided with the opening that matches with described button.

Ought press the button like this and depress snap close 5, snap close 5 can not keep coincideing with the groove of tooth bar 2, is subjected to the elastic force effect of spring 6, promotes contiguous block 4 and moves, and outwards moves thereby promote blackboard eraser, and the length that can prolong blackboard eraser is again clipped the more blackboard of eminence; When not needing to use blackboard eraser, directly blackboard eraser is compressed into that box overlaps 1 inside, the groove of tooth bar 2 and snap close 5 coincide and block, and blackboard eraser just is fixed in the box cover 1 like this, has avoided direct placement to trickle down chalk dust on the table.

Claims

1. blackboard eraser, it is characterized in that, comprise the box cover and be installed in interior contiguous block, tooth bar, spring and the snap close of box cover, described blackboard eraser one end connects a contiguous block, a tooth bar is respectively established in the side of described contiguous block, described tooth bar is provided with the snap close that matches with described tooth bar, and described snap close is fixed on box by fixed bar and puts; The terminal end that connects spring of described contiguous block, the described spring other end is fixed on box and puts.

2. blackboard eraser as claimed in claim 1 is characterized in that, on the described snap close button is installed, and described box puts and is provided with the opening that matches with described button.