CN111231546A

CN111231546A - Independent lifting blackboard

Info

Publication number: CN111231546A
Application number: CN201911083527.4A
Authority: CN
Inventors: 陆安兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-06-05

Abstract

The invention belongs to the technical field of blackboards, and particularly relates to an independent lifting type blackboard which comprises a stand column, a blackboard, a main pulley, pulley rods, a steel wire rope, a counterweight block and the like, wherein a chute is arranged in the stand column, the pulley rods are arranged on the left side and the right side of the blackboard, the pulley rods are connected with the pulleys, a cavity is arranged in the stand column, and the counterweight block is arranged in the cavity.

Description

Independent lifting blackboard

Technical Field

The invention belongs to the technical field of blackboards, and particularly relates to an independent lifting type blackboard.

Background

The prior blackboard which moves up and down generally consists of two blackboards which are connected through pulleys and ropes, the two blackboards are linked up and down, namely when one blackboard rises, the other blackboard descends, and when the two blackboards are overlapped, the other blackboard is generally positioned in the middle position, the up-and-down moving type blackboard has the defects that the two blackboards can not be firmly fixed when stopped at a certain position, the blackboards are easy to move when writing or erasing the blackboards, the blackboards can not be stably hovered at any height, when the blackboard is used in cooperation with multimedia teaching, a projection screen hung in front of the blackboards can shield the blackboards from using, when a projection screen is hung behind the blackboards, the blackboards can shield the projection screen from using, and in order to solve the problems, we propose the following device.

Disclosure of Invention

To solve the problems set forth in the background art described above. The invention provides an independent lifting blackboard which has the characteristics of simple structure, convenience in operation and high stability.

In order to achieve the purpose, the invention provides the following technical scheme: an independent lifting blackboard comprises upright posts, a blackboard, a main pulley, a steel wire rope, pulley blocks, pulley rods, balancing weights and the like, wherein the upright posts are symmetrically arranged on two sides of the blackboard, two groups of independent sliding grooves are formed in the upright posts, the left side and the right side of the blackboard are connected with the pulley rods, the pulley rods are connected with the pulley blocks, and the pulley blocks are arranged in the sliding grooves and can move up and down along the sliding grooves; the blackboard eraser is characterized in that a cavity is arranged in the stand column, the balancing weight is arranged in the cavity and can freely move up and down, the balancing weight is connected with one end of a steel wire rope, the steel wire rope bypasses the rear end of the main pulley, the other end of the steel wire rope is connected with the pulley lever, the stand column is provided with an upper limit, the stand column is connected with a damping spring in a limiting mode, and the blackboard is provided with a blackboard upper handle and a. The blackboard can be used as a single layer structure or a multilayer structure.

Furthermore, the weight of the blackboard is equal to the sum of the weights of the left balancing weight and the right balancing weight, the weight of the blackboard and the weights of the balancing weights reach balance, the blackboard can hover at any point in the stroke between the upper limit and the lower limit, the upper limit and the lower limit are connected with spring damping devices, and impact force generated by impact is avoided.

Furthermore, the stand column is made of aluminum alloy, the invention utilizes the tension of the aluminum alloy material, and the matching between the chute and the pulley block is interference fit, so that the blackboard keeps reasonable damping in the lifting process, and the blackboard can keep a stable state during writing.

The invention has the beneficial effects that:

according to the invention, the pulley lever is arranged to guide the blackboard to move up and down along the upright post sliding groove, the traction direction of the steel wire rope is changed by arranging the main pulley, the weight of the weight block and the weight of the blackboard are balanced, so that the blackboard can hover at any point in the lifting stroke, the reasonable damping is kept in the lifting process of the blackboard through the material tension of the upright post, the blackboard is kept stable during writing, and the mechanisms are matched to run, so that the device is convenient for teaching personnel to use.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a front view cross section of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view of the main pulley structure of the present invention;

FIG. 4 is a schematic view of example 1 of the present invention;

FIG. 5 is a schematic view of example 2 of the present invention;

in the figure: 1-upright column; 2-blackboard; 3-a main pulley; 4-a steel wire rope; 5-upper limit; 6-upper damping spring; 7-handle on blackboard; 8-blackboard lower handle; 9-a pulley block; 10-a pulley lever; 11-a counterweight block; 12 lower damping springs; 13-lower limit; 14-auxiliary pulley.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-5, the present invention provides the following technical solutions: an independent lifting blackboard comprises a stand column 1, a blackboard 2, a main pulley 3, a steel wire rope 4, a pulley block 9, pulley rods 10 and a balancing weight 11, wherein a sliding groove is formed in the stand column 1, the left side and the right side of the blackboard 2 are connected with the pulley rods 10, the pulley rods 10 are connected with the pulley block 9, and the main pulley 3 is arranged at the top of the stand column 1. A cavity is arranged in the upright post 1, the balancing weight 11 is arranged in the cavity, the balancing weight 11 is connected with the steel wire rope 4, and after bypassing the main pulley 3, the other end of the balancing weight is connected with the pulley lever 11).

Specifically, set up the spout in the stand 1, assembly pulley 9 can reciprocate along the spout, set up the cavity in the stand 1, balancing weight 11 arranges in the cavity and can reciprocate.

Specifically, stand 1 is equipped with upper limit 5, and upper limit 5 connects up damping spring 6, the stand is equipped with down spacing 13, and damping spring 12 is down connected to lower spacing 13, blackboard 2 sets up blackboard upper handle 7 and blackboard lower handle 8.

Specifically, the blackboard 2 may be used in a single-layered or multi-layered structure.

The working principle and the using process of the invention are as follows:

when the independent lifting type blackboard provided by the invention is used, a teaching person can pull the upper handle and the lower handle of any blackboard according to the use requirement to lift the blackboard to a height suitable for writing, as shown in the fourth drawing, when one blackboard finishes writing, the blackboard can be pushed upwards or downwards to the top end, the other blackboard is moved to the suitable writing height to continue writing, the lifting activities of the two blackboards are not influenced mutually, and the writing experience of the teaching person is enhanced.

When the blackboard needs to be matched with multimedia teaching for use, a projection screen or a large screen display can be installed behind the blackboard, the blackboard can be normally used when writing is needed, when multimedia equipment is needed, the two blackboards are pushed downwards to the lower limit position (shown in the figure five), and the blackboards and the multimedia equipment are not mutually influenced in use.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an independent over-and-under type blackboard, includes stand (1), blackboard (2), head pulley (3) and wire rope (4), assembly pulley (9), pulley lever (10), balancing weight (11), its characterized in that: be equipped with the spout in stand (1), pulley lever (10) are connected to the blackboard (2) left and right sides, and assembly pulley (9) are connected in pulley lever (10), stand (1) top sets up head pulley (3), be equipped with the cavity in stand (1), in the cavity is arranged in balancing weight (11), balancing weight (11) are connected with wire rope (4), walk around behind head pulley (3), the other end with pulley lever (11) are connected.

2. An independently liftable blackboard according to claim 1, wherein: the pulley block is characterized in that a sliding groove is formed in the upright post (1), the pulley block (9) can move up and down along the sliding groove, a cavity is formed in the upright post (1), and the balancing weight (11) is arranged in the cavity and can move up and down.

3. An independently liftable blackboard according to claim 1, wherein: stand (1) is equipped with upper limit (5), and upper limit (5) connect damping spring (6), the stand is equipped with down spacing (13), and damping spring (12) down are connected to lower spacing (13), blackboard (2) set up handle (7) and blackboard lower handle (8) on the blackboard.

4. An independently liftable blackboard according to claim 1, wherein: the blackboard (2) can be used in a single-layer or multi-layer structure.