CN202319630U

CN202319630U - Clamping rod for blackboard eraser

Info

Publication number: CN202319630U
Application number: CN2011204135457U
Authority: CN
Inventors: 吕凤芹; 郭云雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-26
Filing date: 2011-10-26
Publication date: 2012-07-11
Anticipated expiration: 2021-10-26

Abstract

The utility model discloses a clamping rod for a blackboard eraser, which comprises a fixing clamp, an upper screw and a lower screw. The blackboard eraser is arranged in a clamp opening of the fixing clamp. The clamping rod is characterized in that the fixing clamp is fixedly arranged at the upper end of the upper screw, outer threads are arranged on an outer wall of the upper screw, inner threads are arranged on an inner wall of a central cavity of the lower screw, and the upper screw is sleeved in the central cavity of the lower screw through threads. The clamping rod for the blackboard eraser is simple in structure, convenient to use and capable of helping pupils limited by height to erase characters on the upper portion of the blackboard, saves time and labor, is safe and reliable, and improves efficiency of erasing the blackboard for the pupils.

Description

The blackboard eraser supporting rod

Technical field

The utility model relates to a kind of teaching aid, specifically a kind of blackboard eraser supporting rod.

Background technology

In present primary school teaching, all need the student to use blackboard eraser to erase the board, its weak point is: because the pupil receives the restriction of height; At the word that blackboard top is write, need the pedal stool just can wipe, waste time and energy; Also safety has inadequately reduced the efficient that erases the board.

Summary of the invention

It is a kind of simple in structure, easy to use that the purpose of the utility model is to provide, and can help the limited pupil of height to wipe the blackboard eraser supporting rod of the letter written with chalk of eminence on the blackboard.

In order to reach above purpose; The technical scheme that the utility model adopted is: the blackboard eraser supporting rod, and comprise geometrical clamp, go up screw rod and following screw rod, blackboard eraser is located in the folder mouth of geometrical clamp; It is characterized in that: geometrical clamp is fixedly mounted on the upper end of screw rod; The outer wall of last screw rod is provided with external screw thread, and the center cavity inwall of following screw rod is provided with internal thread, and last screw rod is set in down in the center cavity of screw rod through being threaded.

The utility model is also implemented through following measure: described geometrical clamp is provided with the bolt of screwing.

The described lower end of screw rod down is provided with link.

The beneficial effect of the utility model is: simple in structure, easy to use, and can help the limited pupil of height to wipe the letter written with chalk of eminence on the blackboard, time saving and energy saving, safe and reliable, improved the efficient that the pupil erases the board.

Description of drawings

Fig. 1 looks sketch map for the structure master of the utility model;

Among the figure: 1, geometrical clamp; 2, go up screw rod; 3, following screw rod; 4, link; 5, the bolt of screwing; 6, blackboard eraser.

The specific embodiment

Make the utility model with reference to accompanying drawing 1.This blackboard eraser supporting rod comprises geometrical clamp 1, goes up screw rod 2 and following screw rod 3, and blackboard eraser 6 is located in the folder mouth of geometrical clamp 1; It is characterized in that: geometrical clamp 1 is fixedly mounted on the upper end of screw rod 2; The outer wall of last screw rod 2 is provided with external screw thread, and the center cavity inwall of following screw rod 3 is provided with internal thread, and last screw rod 2 is set in down in the center cavity of screw rod 3 through being threaded; Like this; The total length of last screw rod 2 and following screw rod 3 can be regulated, and in the time of need wiping the letter written with chalk of eminence, can get final product going up the following screw rod 3 increase total lengths of screw rod 2 back-outs.

Described geometrical clamp 1 is provided with the bolt 5 of screwing, and can blackboard eraser 6 be fixed in the folder mouth of geometrical clamp 1 tightly through the bolt 5 of screwing, and prevents that blackboard eraser 6 activities from dropping.

The lower end of described down screw rod 3 is provided with link 4, in time spent not, can it be suspended in the corner of blackboard one side.

During use, wipe the letter written with chalk of lower on the blackboard if desired, unload blackboard eraser 6 and directly wipe and get final product; Wipe the letter written with chalk of eminence if desired, can blackboard eraser 6 be fixed on the geometrical clamp 1, hand-held screw rod 2 is down wiped, and is time saving and energy saving, need not the pedal stool, safe and reliable.

Claims

1. blackboard eraser supporting rod; Comprise geometrical clamp (1), go up screw rod (2) and following screw rod (3); Blackboard eraser (6) is located in the folder mouth of geometrical clamp (1), it is characterized in that: geometrical clamp (1) is fixedly mounted on the upper end of screw rod (2), and the outer wall of last screw rod (2) is provided with external screw thread; The center cavity inwall of following screw rod (3) is provided with internal thread, and last screw rod (2) is set in down in the center cavity of screw rod (3) through being threaded.

2. blackboard eraser supporting rod according to claim 1 is characterized in that: described geometrical clamp (1) is provided with the bolt of screwing (5).

3. blackboard eraser supporting rod according to claim 1 is characterized in that: the described lower end of screw rod (3) down is provided with link (4).