CN211684352U

CN211684352U - Height-adjustable blackboard

Info

Publication number: CN211684352U
Application number: CN201922500790.0U
Authority: CN
Inventors: 季芮伊; 邵和义
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-16
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a height-adjustable blackboard, which comprises an underframe and a blackboard body; the underframe is U-shaped; the blackboard body is arranged right above the bottom frame; a height adjusting device is arranged between the blackboard body and the bottom frame; the height adjusting devices are arranged in two groups and are symmetrically arranged on two sides of the blackboard body; the height adjusting device comprises a sleeve, an L-shaped connecting piece and a locking bolt; the sleeve is vertically arranged, and the lower end of the sleeve is fixed on the bottom frame; the horizontal part of the L-shaped connecting piece is fixed on the blackboard body, and the vertical part of the L-shaped connecting piece extends into the sleeve; the locking bolt is arranged on the outer side wall of the sleeve, and the inner end of the locking bolt points to the center line of the sleeve. The utility model has simple structure, no complex mechanical transmission structure (such as cylinder, motor, etc.), and strong practicability; the height of the blackboard can be conveniently adjusted, the blackboard is suitable for teachers with various heights, and the application range is wide.

Description

Height-adjustable blackboard

Technical Field

The utility model relates to a blackboard technical field especially relates to a height-adjustable blackboard.

Background

The blackboard is used as an educational aid, plays a great role in the teaching process, and is an indispensable aid for teaching to a certain extent. Firstly, a blackboard in a classroom is fixedly installed on a wall surface, a teacher needs to bend over at the bottom and stand on tiptoe at the top in the writing process, and a large burden is caused to the body of the teacher; for teachers with smaller heads, standing tiptoes cannot reach the top of the blackboard, and only a part of area of the blackboard can be used for teaching, so that the teaching efficiency is reduced; later, people invented a lifting blackboard which comprises a blackboard, a rope and a pulley, wherein one end of the rope is connected with the upper part of the blackboard, the other end of the rope is connected with a balancing weight through the pulley, the balancing weight and the blackboard are balanced in stress, and the height of the blackboard can be adjusted by using small force; however, when the height of the blackboard is adjusted in such a way, the balance cannot be achieved quickly, time is wasted, and the counterweight block easily makes collision sound at the clamping position, so that people feel uncomfortable. Based on this, how to design a simple structure, adjust convenient height-adjustable blackboard is the utility model discloses the technical problem that will solve.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide a simple structure, adjust convenient height-adjustable blackboard.

The utility model discloses a following technical means realizes solving above-mentioned technical problem:

a height-adjustable blackboard comprises a bottom frame and a blackboard body; the underframe is U-shaped; the blackboard body is arranged right above the bottom frame; a height adjusting device is arranged between the blackboard body and the bottom frame; the height adjusting devices are arranged in two groups and are symmetrically arranged on two sides of the blackboard body; the height adjusting device comprises a sleeve, an L-shaped connecting piece and a locking bolt; the sleeve is vertically arranged, and the lower end of the sleeve is fixed on the bottom frame; the horizontal part of the L-shaped connecting piece is fixed on the blackboard body, and the vertical part of the L-shaped connecting piece extends into the sleeve; the locking bolt is arranged on the outer side wall of the sleeve, and the inner end of the locking bolt points to the center line of the sleeve.

Preferably, the height-adjustable blackboard is characterized in that the vertical part of the L-shaped connecting piece is provided with scale marks.

Preferably, in the height-adjustable blackboard, the dust receiving plate is arranged at the upper end of the horizontal part of the bottom frame; an insertion opening is formed at the inner corner of the bottom frame; two sides of the dust receiving plate are respectively inserted into the insertion ports on two sides of the underframe; and the upper surface of the dust collecting plate is provided with a dust storage groove.

Preferably, in the height-adjustable blackboard, the horizontal part of the bottom frame is provided with a containing groove.

The utility model has the advantages that: the utility model has simple structure, no complex mechanical transmission structure (such as cylinder, motor, etc.), and strong practicability; the height of the blackboard can be conveniently adjusted, the blackboard is suitable for teachers with various heights, and the application range is wide.

Furthermore, the arrangement of the scale marks enables teachers to remember the scale positions required to be adjusted when using the device, so that the next adjustment is facilitated, and the adjustment is more convenient, rapid and accurate; in addition, the arrangement of the scale marks can ensure that the two sides of the blackboard body are equal in height, and the condition that one side is high and the other side is low is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the dust collecting plate of the present invention.

Fig. 3 is a schematic structural diagram of the bottom frame of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, a height-adjustable blackboard includes a chassis 1, a blackboard body 2; the underframe 1 is U-shaped; the blackboard body 2 is arranged right above the bottom frame 1; a height adjusting device 3 is arranged between the blackboard body 2 and the bottom frame 1; the height adjusting devices 3 are arranged in two groups and symmetrically arranged on two sides of the blackboard body 2; the height adjusting device 3 comprises a sleeve 31, an L-shaped connecting piece 32 and a locking bolt 33; the sleeve 31 is vertically arranged, and the lower end of the sleeve is fixed on the underframe 1; the horizontal part 321 of the L-shaped connecting piece 32 is fixed on the blackboard body 2, the vertical part 322 extends into the sleeve 31, and the vertical part 322 can freely move up and down in the sleeve 31; the locking bolt 33 is mounted on the outer side wall of the sleeve 31 with its inner end directed towards the centre line of the sleeve 31.

During installation, the underframe is fixed on a wall body, and can be fixed through bolts; the height adjusting devices 3 are divided into two groups and symmetrically arranged at two sides between the bottom frame 1 and the blackboard body 2 and used for adjusting the height of the blackboard body 2; the height adjusting device 3 specifically includes: a sleeve 31, the lower end of which is fixed at the top end position of one side of the chassis 1, and the sleeve is provided with an adjusting groove (not shown) for accommodating the L-shaped connecting piece vertical part 322; the L-shaped connecting piece 32 comprises a horizontal part 321 and a vertical part 322, wherein the horizontal part 321 is used for connecting the blackboard body 2, the vertical part 322 is arranged in the adjusting groove of the sleeve 31, and the height of the blackboard body 2 is adjusted through the lifting of the vertical part 322; the locking bolt 33 is installed on the outer side wall of the sleeve 31 through threaded connection, namely a threaded hole for installing the locking bolt is formed in the side wall of the sleeve 31 and communicated with the adjusting groove, and the locking bolt 33 is rotated to enable the locking bolt 33 to be close to or far away from the L-shaped connecting piece vertical part 322;

the height adjusting method comprises the following steps: the locking bolts 33 on the two sides are rotated to release the locking effect of the rotating locking bolts 33 on the L-shaped connecting piece 32, then the blackboard body 2 is adjusted by hand to be lifted to a proper height, and then the locking bolts 33 on the two sides are rotated to enable the locking bolts 33 to tightly push against the L-shaped connecting piece;

the utility model has simple structure, no complex mechanical transmission structure (such as cylinder, motor, etc.), and strong practicability; the height of the blackboard can be conveniently adjusted, the blackboard is suitable for teachers with various heights, and the application range is wide.

Preferably, referring to fig. 1, in order to conveniently, quickly and accurately adjust the height of the blackboard body 2, the vertical portion 322 of the L-shaped connecting member 32 is provided with scale lines 3221; when the scale is used, a teacher can remember the scale position required to be adjusted, so that the next adjustment is facilitated, and the adjustment is more convenient, rapid and accurate; in addition, the arrangement of the graduation lines 3221 can ensure that the two sides of the blackboard body 2 have the same height, and the situation that one side is high and the other side is low can be avoided.

Preferably, referring to fig. 1, 2 and 3, a dust receiving plate 11 is arranged at the upper end of the horizontal part of the chassis 1; an insertion opening 12 is formed at the inner corner of the bottom frame 1; two sides of the dust receiving plate 11 are respectively inserted into the insertion holes 12 on two sides of the underframe 1; the upper surface of the dust receiving plate 11 is provided with a dust storage groove 111;

the dust collecting plate 11 is positioned right below the blackboard body 2, and when the blackboard is wiped down, the chalk dust falls in the dust storage groove 111 on the dust collecting plate 11, so that the chalk dust is prevented from falling on the floor of a classroom, and the cleanness of the classroom is guaranteed; the dust collecting plate 11 on the dust collecting plate 11 is detachably arranged on the bottom frame 1 through an insertion hole, so that chalk dust on the dust collecting plate 11 can be conveniently cleaned.

Preferably, referring to fig. 1, in order to conveniently place articles commonly used by teachers, such as chalks and blackboard erasers, the horizontal portion of the chassis 1 is provided with a receiving groove 13.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A height-adjustable blackboard which is characterized in that: comprises a bottom frame (1) and a blackboard body (2); the underframe (1) is U-shaped; the blackboard body (2) is arranged right above the bottom frame (1); a height adjusting device (3) is arranged between the blackboard body (2) and the bottom frame (1); the height adjusting devices (3) are arranged in two groups and symmetrically arranged on two sides of the blackboard body (2); the height adjusting device (3) comprises a sleeve (31), an L-shaped connecting piece (32) and a locking bolt (33); the sleeve (31) is vertically arranged, and the lower end of the sleeve is fixed on the bottom frame (1); the horizontal part (321) of the L-shaped connecting piece (32) is fixed on the blackboard body (2), and the vertical part (322) extends into the sleeve (31); the locking bolt (33) is arranged on the outer side wall of the sleeve (31), and the inner end of the locking bolt points to the center line of the sleeve (31).

2. A height adjustable blackboard according to claim 1, characterised in that: and scale marks (3221) are arranged on the vertical part (322) of the L-shaped connecting piece (32).

3. A height adjustable blackboard according to claim 1, characterised in that: a dust receiving plate (11) is arranged at the upper end of the horizontal part of the bottom frame (1); an insertion opening (12) is formed in the inner corner of the bottom frame (1); two sides of the dust receiving plate (11) are respectively inserted into the insertion holes (12) on two sides of the chassis (1); the upper surface of the dust collecting plate (11) is provided with a dust storage groove (111).

4. A height adjustable blackboard according to claim 1, characterised in that: the horizontal part of the bottom frame (1) is provided with an accommodating groove (13).