CN211808670U

CN211808670U - Blackboard with adjustable use area

Info

Publication number: CN211808670U
Application number: CN201821544085.XU
Authority: CN
Inventors: 潘为红
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2020-10-30
Anticipated expiration: 2028-09-21

Abstract

The utility model discloses a blackboard of adjustable usable floor area, the power distribution box comprises a box body, the left side of axis department is provided with positive and negative motor in box inner chamber bottom, the output fixedly connected with worm of positive and negative motor, the positive surface meshing of worm has the worm wheel, the inner chamber cover of worm wheel is equipped with the threaded rod, the top threaded connection on screw rod surface has the thread block, the first movable block of the equal fixedly connected with in both sides of thread block, one side swing joint that the thread block was kept away from to first movable block has the movable rod, one side swing joint that first movable block was kept away from to the movable rod has the second movable block. The utility model discloses a cooperation that has set up positive and negative motor, worm wheel, fixed plate, threaded rod, screw thread piece, first movable block, movable rod and second movable block is used, has solved the problem that prior teaching show board can not adjust usable floor area, has improved the practicality of this equipment, has made things convenient for user's use, is worth promoting.

Description

Blackboard with adjustable use area

Technical Field

The utility model relates to a teaching aid technical field specifically is an adjustable usable floor area's blackboard.

Background

The blackboard is not specially designated black face, it is a plane that can write repeatedly with the chalk in the traditional meaning, the face is hard, many be used for teaching, the blackboard generally is made with plank or ground glass etc. can write on it with specific writing material such as chalk, mostly be black, dark greenish black, white or beige, at present, the blackboard is the indispensable teaching articles for use in the teaching aid, current blackboard all is fixed, can not change the usable floor area of blackboard, when the mr need show more article, just need increase new blackboard, the use of giving the mr has brought very big inconvenience, the practicality of blackboard for teaching has been reduced, for this reason, we propose a blackboard of adjustable usable floor area.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adjustable usable floor area's blackboard possesses adjustable usable floor area's advantage, has solved the problem that usable floor area can not be adjusted to current teaching show board.

In order to achieve the above object, the utility model provides a following technical scheme: a blackboard with adjustable use area comprises a box body, wherein a positive and negative motor is arranged on the left side of a middle shaft at the bottom of an inner cavity of the box body, a worm is fixedly connected with the output end of the positive and negative motor, a worm wheel is meshed on the positive surface of the worm, a threaded rod is sleeved in the inner cavity of the worm wheel, a threaded block is connected with the top thread of the surface of the threaded rod, first movable blocks are fixedly connected on the two sides of the threaded block, one side of each first movable block, far away from the threaded block, is movably connected with a movable rod, one side of each movable rod, far away from the first movable block, is movably connected with a second movable block, one side of each second movable block, far away from the movable rod, is fixedly connected with a movable rod, the top of the movable rod penetrates through the box body and extends to the top of the box body, a second blackboard, the both sides of first blackboard inner chamber all are provided with the second blackboard, and two second blackboard one sides that back on the back mutually all run through first blackboard and extend to the outside of first blackboard, the equal fixedly connected with connecting rod in both sides of bottom half, the bottom swing joint of connecting rod has the gyro wheel.

Preferably, first spouts have all been seted up to the both sides at first blackboard inner chamber top and the both sides of bottom, the inner chamber sliding connection of first spout has first slider, one side fixedly connected with connecting block of first spout is kept away from to first slider, one side and the second blackboard fixed connection of first slider are kept away from to the connecting block, the second spout has all been seted up to the both sides of box inner chamber bottom, the inner chamber sliding connection of second spout has the second slider, the top and the carriage release lever fixed connection of second slider.

Preferably, the bottom of the positive and negative motor is fixedly connected with a fixing bolt, and the bottom of the fixing bolt is in threaded connection with the box body.

Preferably, the right side swing joint of worm has the bearing frame, and the right side fixedly connected with fixed plate of bearing frame, the bottom and the box fixed connection of fixed plate.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a cooperation that has set up positive and negative motor, worm wheel, fixed plate, threaded rod, screw thread piece, first movable block, movable rod and second movable block is used, has solved the problem that prior teaching show board can not adjust usable floor area, has improved the practicality of this equipment, has made things convenient for user's use, is worth promoting.

2. The utility model discloses a set up first spout, first slider and connecting block, stabilized the removal of second blackboard, avoided the second blackboard during operation unstable phenomenon to appear, through setting up second slider and second spout, stabilized the work of carriage release lever, avoided the carriage release lever during operation the phenomenon that rocks to appear, through setting up fixing bolt, stabilized the work of positive and negative motor, avoided the phenomenon that positive and negative motor during operation shake to appear.

Drawings

FIG. 1 is a front view of the present invention;

fig. 2 is the internal structure diagram of the box of the present invention.

In the figure: the blackboard comprises a box body 1, a moving rod 2, a second blackboard 3, a connecting block 4, a first sliding block 5, a first sliding chute 6, a first blackboard 7, a roller 8, a connecting rod 9, a fixing bolt 10, a positive and negative motor 11, a worm 12, a worm wheel 13, a fixing plate 14, a threaded rod 15, a threaded block 16, a first movable block 17, a movable rod 18, a second movable block 19, a second sliding block 20 and a second sliding chute 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a blackboard with adjustable usable floor area comprises a box body 1, wherein a positive and negative motor 11 is arranged on the left side of a central axis at the bottom of an inner cavity of the box body 1, and the types of the positive and negative motor 11 are as follows: DM, the bottom of a positive and negative motor 11 is fixedly connected with a fixed bolt 10, the bottom of the fixed bolt 10 is in threaded connection with a box body 1, the work of the positive and negative motor 11 is stabilized by arranging the fixed bolt 10, the phenomenon of shaking during the work of the positive and negative motor 11 is avoided, the output end of the positive and negative motor 11 is fixedly connected with a worm 12, the right side of the worm 12 is movably connected with a bearing seat, the right side of the bearing seat is fixedly connected with a fixed plate 14, the bottom of the fixed plate 14 is fixedly connected with the box body 1, the positive surface of the worm 12 is meshed with a worm wheel 13, an inner cavity of the worm wheel 13 is sleeved with a threaded rod 15, the top of the surface of the threaded rod 15 is in threaded connection with a threaded block 16, both sides of the threaded block 16 are fixedly connected with a first movable block 17, one side of the first movable block 17, which is far, a moving rod 2 is fixedly connected to one side of a second moving block 19 far away from a moving rod 18, second sliding grooves 21 are respectively formed in two sides of the bottom of an inner cavity of a box body 1, a second sliding block 20 is connected to the inner cavity of the second sliding groove 21 in a sliding manner, the top of the second sliding block 20 is fixedly connected with the moving rod 2, the second sliding block 20 and the second sliding groove 21 are arranged, the work of the moving rod 2 is stabilized, the phenomenon that the moving rod 2 shakes during work is avoided, the top of the moving rod 2 penetrates through the box body 1 and extends to the top of the box body 1, a second blackboard 3 is fixedly connected to the top of the moving rod 2, a first blackboard 7 is fixedly connected to a middle shaft at the top of the box body 1, second blackboards 3 are respectively arranged on two sides of an inner cavity of the first blackboard 7, first sliding grooves 6 are respectively formed in two sides of the top and the bottom of the inner cavity of the first blackboard 7, a first sliding block 5 is connected to one side of the first, one side and the 3 fixed connection of second blackboard of first slider 5 are kept away from to connecting block 4, through having set up first spout 6, first slider 5 and connecting block 4, the removal of second blackboard 3 has been stabilized, the unstable phenomenon appears in the second blackboard 3 during operation of having avoided, two second blackboard 3 one sides of carrying on the back mutually all run through first blackboard 7 and extend to the outside of first blackboard 7, the equal fixedly connected with connecting rod 9 in both sides of box 1 bottom, the bottom swing joint of connecting rod 9 has gyro wheel 8.

During the use, the worm 12 is driven to rotate through the positive and negative motor 11, the worm 12 drives the worm wheel 13 to rotate, the worm wheel 13 drives the threaded rod 15 to rotate, the threaded rod 15 drives the threaded block 16 to move, the threaded block 16 drives the first movable block 17 to move, the first movable block 17 drives the movable rod 18 to move, the movable rod 18 drives the second movable block 19 to move, the second movable block 19 drives the movable rod 2 to move, and the movable rod 2 drives the second blackboard 3 to move, so that the purpose of adjusting the use area is achieved.

In summary, the following steps: this blackboard of adjustable usable floor area through the cooperation that has set up positive and negative motor 11, worm 12, worm wheel 13, fixed plate 14, threaded rod 15, screw block 16, first movable block 17, movable rod 18 and second movable block 19, has solved the problem that the usable floor area can not be adjusted to current teaching show board.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an adjustable usable floor area's blackboard, includes box (1), its characterized in that: the left side of axis department is provided with positive and negative motor (11) in box (1) inner chamber bottom, the output fixedly connected with worm (12) of positive and negative motor (11), the positive surface meshing of worm (12) has worm wheel (13), the inner chamber cover of worm wheel (13) is equipped with threaded rod (15), the top threaded connection on threaded rod (15) surface has screw block (16), the equal fixedly connected with first movable block (17) in both sides of screw block (16), one side swing joint that screw block (16) were kept away from in first movable block (17) has movable rod (18), one side swing joint that first movable block (17) was kept away from in movable rod (18) has second movable block (19), one side fixedly connected with carriage release lever (2) that movable rod (18) were kept away from in second movable block (19), the top of carriage release lever (2) runs through box (1) and extends to the top of box (1), the top fixedly connected with second blackboard (3) of carriage release lever (2), the first blackboard (7) of axis fixedly connected with department at box (1) top, the both sides of first blackboard (7) inner chamber all are provided with second blackboard (3), and the outside of first blackboard (7) and extending to first blackboard (7) is all run through to one side that two second blackboards (3) carried on the back mutually, the equal fixedly connected with connecting rod (9) in both sides of box (1) bottom, the bottom swing joint of connecting rod (9) has gyro wheel (8).

2. The blackboard of claim 1, which is characterized in that: first spout (6) have all been seted up with the both sides of bottom in the both sides at first blackboard (7) inner chamber top, the inner chamber sliding connection of first spout (6) has first slider (5), one side fixedly connected with connecting block (4) of first spout (6) are kept away from in first slider (5), one side and second blackboard (3) fixed connection of first slider (5) are kept away from in connecting block (4), second spout (21) have all been seted up to the both sides of box (1) inner chamber bottom, the inner chamber sliding connection of second spout (21) has second slider (20), the top and carriage release lever (2) fixed connection of second slider (20).

3. The blackboard of claim 1, which is characterized in that: the bottom of the positive and negative motor (11) is fixedly connected with a fixing bolt (10), and the bottom of the fixing bolt (10) is in threaded connection with the box body (1).

4. The blackboard of claim 1, which is characterized in that: the right side swing joint of worm (12) has the bearing frame, and the right side fixedly connected with fixed plate (14) of bearing frame, the bottom and box (1) fixed connection of fixed plate (14).