CN221892863U - Adjustable green board is used in teaching - Google Patents

Abstract

The utility model provides an adjustable green board for teaching, which belongs to the technical field of teaching tools and comprises a green board body, wherein a second connecting block is fixedly arranged on the upper side wall of a movable block, the movable block is connected with the outer side wall of a sliding rod in a sliding manner, the two sliding rods are symmetrically and fixedly arranged on the right side wall of a wall body, the right side wall of the wall body is symmetrically and fixedly connected with a lead screw through a mounting seat in a rotating manner, the green board is adjusted to a proper writing angle through the rotating lead screw, the operation process of a user is facilitated, the operation process is more comfortable, the lead screw is reversely rotated after the operation process is used, the green board is stored in a position attached to the wall surface, the occupied space is reduced, the green board body is supported through the two movable blocks on the lower surface of the green board body, the stability of the green board body in the use process is ensured, and the green board is prevented from falling off from the wall surface.

Description

Adjustable green board is used in teaching

Technical Field

The utility model belongs to the technical field of teaching aids, and particularly relates to an adjustable green board for teaching.

Background

The green board is a black board which is not specially used for teaching and training, is a plane which can be repeatedly written by chalks in the traditional sense, is hard, is mostly used for teaching, is generally made of wood boards or ground glass and the like, can be used for writing on by using specific writing materials such as chalks and the like, is mostly black, dark green, white or beige, is dark green, is written by chalks, does not irritate eyes of people, is beneficial to vision protection, and can be used in the training process of some companies;

The related art (publication number: CN 215850457U) discloses a push-pull teaching green board, and the technical scheme disclosed by the push-pull teaching green board comprises: the cleaning piece is connected with the dust collecting rail through the transmission component, when the green board body moves in the dust collecting rail to a preset direction, the transmission component can drive the cleaning piece to descend so as to be in contact with the dust collecting rail, so that the cleaning piece can clean dust in the dust collecting rail, and when the green board body moves reversely, the transmission component drives the cleaning piece to ascend so as to be separated from the dust collecting rail, thereby effectively avoiding the problem that dust flies due to repeated rolling of dust when the teaching green board is pushed and pulled back and forth, and being inconvenient to clean;

In the above disclosed technical solution, the following problems are found in the related art: during teaching or viewing, the subject in certain positions due to the arrangement of the seats may appear in the light reflection, resulting in unclear viewing through

The position and the writing angle are adjusted, the reflecting surface can be adjusted, so that the teaching viewing is clearer, and an adjustable green board for teaching is provided;

It should be noted that the information disclosed in the foregoing background section is only for enhancing the understanding of the background section of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of utility model

In order to solve the problems of green board storage and the like in the prior art, the utility model provides an adjustable green board for teaching, which is convenient to store by combining a suspension type push-pull mechanism with a position locking mechanism. The specific technical scheme is as follows:

The utility model provides an adjustable green board is used in teaching, includes green board body, the left side wall fixed mounting of green board body has the rotation seat, rotation seat swing joint is at the lateral wall of fixed axle, fixed axle fixed mounting is in the inside wall of fixing base, fixing base fixed mounting is at the lateral wall of wall body, the fixed mounting of the lower lateral wall symmetry of green board body has first connecting block, the inner chamber rotation of first connecting block is connected with the sleeve, telescopic inside wall sliding connection has the slider, the lateral wall fixed mounting of slider has the one end of movable rod, the other end rotation of movable rod is connected with the second connecting block, second connecting block fixed mounting is in the upper lateral wall of movable block, movable block sliding connection is in the lateral wall of slide bar, two the fixed mounting of slide bar symmetry is in the right side wall of wall body, the right side wall symmetry is connected with the lead screw through the mount rotation, the lateral wall threaded connection of lead screw has the movable seat, the right side wall fixed mounting of movable seat has first connecting seat, the inner chamber of first connecting seat is through rotating the one end of connecting the transfer line, the other end of transfer line is in through rotating the second connecting block, the second connecting block is in the side wall through rotating the second of the second connection of the movable body.

In addition, the adjustable green board for teaching provided by the utility model has the following additional technical characteristics:

In the above technical scheme, preferably, two opposite side walls of the two mounting seats are respectively and symmetrically fixedly provided with two ends of the guide rod, a left side wall of the movable seat is fixedly provided with a guide block, and the guide block is slidably connected with an outer side wall of the guide rod.

Preferably, the right side wall of green board body symmetry respectively fixed mounting have first connecting plate and second connecting plate, first connecting plate with the spout has all been seted up to the inner chamber of second connecting plate, the inside wall sliding connection of spout has the link, the inside wall of link has the gyro wheel through pivot swing joint, two the gyro wheel sliding connection respectively first connecting plate with the back of the body lateral wall of second connecting plate, two the link symmetry respectively fixed mounting is in the upper and lower both sides wall of backup pad, the left side wall fixed mounting of backup pad has the piece of wiping, the piece sliding connection of wiping is in the right side wall of green board body.

Preferably, a threaded seat is fixedly arranged on the side wall of the supporting plate, and a clamping bolt is connected to the inner side wall of the threaded seat in a threaded manner.

Preferably, the right side wall of the supporting plate is provided with a buckle.

Preferably, the lower side wall of the first connecting plate is symmetrically connected with an unreeling roller through a supporting block in a rotating mode, and a curtain is wound on the outer side wall of the unreeling roller.

Preferably, a hook is fixedly installed at one end of the curtain, a clamping ring is fixedly installed on the front side wall of the second connecting plate through a fixing block, and the clamping ring corresponds to the hook.

Preferably, a baffle is fixedly arranged on the right side wall of the second connecting plate.

Compared with the prior art, the adjustable green board for teaching has the beneficial effects that: the adjustable green plate for teaching supports the screw rod through the bearings inside the two mounting seats, so that the stability of the screw rod in the rotating process is guaranteed, the screw rod enables the movable seat in threaded connection to move along the outer surface of the screw rod through threads on the outer surface during rotation, the green plate is adjusted to a proper writing angle through rotation of the screw rod, convenience is brought to the operation process of a user, and the operation process is more comfortable;

After the use, the screw rod is reversely rotated, the green plate is stored at the position of the attached wall surface, the occupied space is reduced, the storage is convenient, the green plate body is supported by the two movable blocks on the lower surface of the green plate body, thereby ensuring the stability of the green plate body in the use process, avoiding the green plate from falling off the wall surface,

When the movable block with the hinged lower surface is driven by the green plate body to move along the sliding rod, the movable seat is attached to the outer surface to move by rotating the lead screw, so that the movable seat drives the guide blocks to simultaneously attach to the outer surfaces of the two guide rods to slide, the stability of the movable seat in the moving process is ensured, the stability of the green plate adjusting process is ensured,

When the writing is wrong or the surface of the green plate needs to be cleaned, the supporting plate drives the wiping block to be attached to the surface of the green plate to slide, and the handwriting on the surface of the green plate is cleaned through the wiping block, so that the operation process is more convenient,

When the support plate drives the wiping block to move, the support plate drives the connecting frames at two sides to be attached to the inside of the chute to slide, the connecting frames drive the rollers to be attached to the back surfaces of the first connecting plate and the second connecting plate respectively to move, the stability of the moving process of the wiping block is ensured through the two rollers, the effect of cleaning handwriting is improved,

When the wiping block is not used, the clamping bolt is propped against the upper surface of the second connecting plate by rotating the clamping bolt, so that the position of the wiping block is locked, the wiping block is prevented from sliding, the shaft bodies at the two ends of the unreeling roller are respectively embedded into the bearing of the supporting block, the unreeling roller can be ensured to stably and horizontally rotate,

The curtain is wound on the outer surface of the unreeling roller, projection can be carried out through the curtain, convenience is brought to teaching, a winding spring can be installed at the shaft body of the two ends of the unreeling roller, automatic winding is achieved, and the groove cavity formed by the baffle and the second connecting plate is used for storing writing pens, so that convenience is brought to a user.

Drawings

Fig. 1 is a schematic structural view of an adjustable green board for teaching according to an embodiment of the present utility model;

fig. 2 is an a-direction structural schematic diagram of a schematic diagram of an adjustable green board structure for teaching according to the embodiment of the present utility model shown in fig. 1;

Wherein, the correspondence between the reference numerals and the component names in fig. 1 and 2 is: 1-green board body, 2-first connecting board, 3-second connecting board, 4-baffle, 5-supporting board, 6-roller, 7-supporting block, 8-unreeling roller, 9-wall, 10-rotating seat, 11-first connecting seat, 12-fixed seat, 13-fixed shaft, 14-screw rod, 15-guide rod, 16-guide block, 17-mounting seat, 18-slide bar, 19-movable rod, 20-movable shafts, 21-movable blocks, 22-second connecting blocks, 23-wiping blocks, 24-transmission rods, 25-movable seats, 27-second connecting seats, 28-connecting frames, 29-sliding grooves, 30-threaded seats, 31-clamping bolts, 32-buckles, 33-curtains, 34-clamping rings, 35-hooks, 36-fixed blocks, 38-sleeves, 39-sliding blocks and 40-first connecting blocks.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

The utility model will be further described with reference to specific embodiments and figures 1-2, but the utility model is not limited to these embodiments.

Example 1

An adjustable green board for teaching, as shown in fig. 1 and 2, comprises a green board body 1, a rotary seat 10 fixedly arranged on the left side wall of the green board body 1, the rotary seat 10 movably connected with the outer side wall of a fixed shaft 13, the fixed shaft 13 fixedly arranged on the inner side wall of a fixed seat 12, the fixed seat 12 fixedly arranged on the side wall of a wall body 9, the fixed seat 12 fixed on the surface of the wall body 9 through bolts, a fixed shaft 13 fixedly arranged horizontally in the fixed seat 12, the rotary seat 10 fixedly arranged on the left side surface of the green board body 1, a mounting hole formed in the inner cavity of the rotary seat 10, the rotary seat 10 movably sleeved on the outer surface of the fixed shaft 13 through the mounting hole, the rotating seat 10 drives the green board body 1 to rotate by taking the fixed shaft 13 as a center, a first connecting block 40 is symmetrically and fixedly arranged on the lower side wall of the green board body 1, a sleeve 38 is rotationally connected to the inner cavity of the first connecting block 40, a sliding block 39 is slidingly connected to the inner side wall of the sleeve 38, one end of a movable rod 19 is fixedly arranged on the side wall of the sliding block 39, a second connecting block 22 is rotationally connected to the other end of the movable rod 19, the sliding block 39 is attached to the inner wall of the sleeve 38 and slides, the movable rod 19 penetrates through the lower surface of the sleeve 38 and extends to the outside, the movable rod 19 slides in a penetrating hole with the sleeve 38, and a telescopic rod body formed by the movable rod 19 and the sleeve 38, The lower end of the movable rod 19 is hinged with the second connecting block 22, the upper end of the sleeve 38 is hinged with the first connecting block 40, the second connecting block 22 is fixedly arranged on the upper side wall of the movable block 21, the movable block 21 is slidably connected with the outer side wall of the sliding rod 18, the two sliding rods 18 are symmetrically and fixedly arranged on the right side wall of the wall body 9, the two sliding rods 18 which are parallel to each other are symmetrically and fixedly arranged on the front and back of the surface of the wall body 9, the movable block 21 is movably sleeved on the outer surface of each sliding rod 18, the inner cavity of the movable block 21 is provided with a mounting hole, the movable block 21 is attached to the outer surface of the sliding rod 18 through the mounting hole to slide, the second connecting block 22 is fixedly arranged on the upper surface of each movable block 21, The lower part of the green plate body 1 is supported by two slide bars 18 which are parallel to each other, the lower surface of the green plate body 1 is hinged with a movable block 21 by two groups of telescopic rod bodies which are composed of a sleeve 38 and a movable rod 19, the right side wall of the wall body 9 is symmetrically connected with a screw rod 14 through a mounting seat 17 in a rotating way, the right side surface of the wall body 9 is fixedly provided with two mounting seats 17 which are parallel to each other in an up-down symmetrical way, a mounting bearing is embedded in the interior of each mounting seat 17, two ends of the screw rod 14 are respectively embedded in the interiors of the two bearings through a shaft body, the screw rod 14 is ensured to stably rotate in a vertical position, the outer side wall of the screw rod 14 is in threaded connection with a movable seat 25, The right side wall of the movable seat 25 is fixedly provided with a first connecting seat 11, the inner cavity of the first connecting seat 11 is rotationally connected with one end of a transmission rod 24 through a rotating shaft, the other end of the transmission rod 24 is rotationally connected with a second connecting seat 27 through the rotating shaft, the second connecting seat 27 is fixedly arranged on the left side wall of the green board body 1, the inner cavities of the first connecting seat 11 and the second connecting seat 27 are fixedly provided with rotating shafts, two ends of the transmission rod 24 are respectively movably sleeved on the outer surfaces of the rotating shafts inside the first connecting seat 11 and the second connecting seat 27 through mounting holes arranged, so that two ends of the transmission rod 24 are respectively hinged with the first connecting seat 11 and the second connecting seat 27, When in use, the screw rod 14 is rotated, the screw rod 14 is supported by the bearings inside the two mounting seats 17, the stability of the screw rod 14 in the rotating process is ensured, the screw rod 14 moves along the outer surface of the screw rod 14 through the threads on the outer surface during rotation, the movable seat 25 drives one end of the hinged transmission rod 24 to move through the first connecting seat 11 when the movable seat 25 moves, the other end of the transmission rod 24 drives the hinged second connecting seat 27 to move, the position, close to the lower end, of the green plate body 1 is driven to move through the second connecting seat 27, the green plate body 1 rotates by taking the fixed shaft 13 as the center through the rotating seat 10, The angle of the green plate body 1 is adjusted along with the rotation of the screw rod 14, the green plate is adjusted to a proper writing angle through rotating the screw rod 14, the operation process of a user is facilitated, the operation process is more comfortable, the screw rod 14 is reversely rotated after the operation process is used, the green plate is stored at the position of the joint wall surface, the occupied space is reduced, the green plate is convenient to store, when the angle of the green plate body 1 is adjusted through the screw rod 14, the lower surface of the green plate body 1 can drive the hinged sleeve 38 to move, the sliding movable rod 19 drives the hinged second connecting block 22 to move along with the change of the angle of the green plate body 1, the second connecting block 22 drives the movable block 21 to joint the outer surface of the sliding rod 18 to slide, Two movable blocks 21 through the lower surface of the green plate body 1 support the green plate body 1, so that the stability of the green plate body 1 in the use process is guaranteed, the green plate is prevented from falling off from a wall surface, the stability of the position adjusting process of the green plate body 1 is guaranteed along with the movement of the movable block 21 with the hinged lower surface of the green plate body 1 along with the sliding rod 18, and the adjustable range of the green plate is increased, so that the operation and the use are more comfortable.

Specifically, the two ends of the guide rod 15 are respectively and symmetrically fixedly installed on the opposite side walls of the two installation seats 17, the two guide rods 15 are respectively and fixedly installed between the two installation seats 17 in a front-back and front-front symmetrical mode, the two guide rods 15 are mutually parallel and vertically fixed on the surface of the installation seat 17, the guide block 16 is fixedly installed on the left side wall of the movable seat 25, the guide block 16 is slidably connected to the outer side wall of the guide rod 15, the guide block 16 is fixedly installed on the left side surface of the movable seat 25, two installation holes are symmetrically formed in the inner cavity of the guide block 16, the guide block 16 is movably sleeved on the outer surfaces of the two guide rods 15 simultaneously through the two installation holes, the guide block 16 is simultaneously attached to the outer surfaces of the two guide rods 15 in a parallel mode, when the movable seat 25 is attached to the outer surfaces to move through the rotating screw rod 14, the movable seat 25 drives the guide block 16 to be simultaneously attached to the outer surfaces of the two guide rods 15 in a sliding mode, stability of the moving process of the movable seat 25 is guaranteed, and therefore stability of a green plate adjusting process is guaranteed.

Specifically, the right side wall of the green plate body 1 is respectively and symmetrically and fixedly provided with a first connecting plate 2 and a second connecting plate 3, the first connecting plate 2 is fixedly arranged at the uppermost end of the right side surface of the green plate body 1, the second connecting plate 3 is fixedly arranged at the lowermost end of the right side surface of the green plate body 1, the first connecting plate 2 and the second connecting plate 3 are mutually parallel, the inner cavities of the first connecting plate 2 and the second connecting plate 3 are respectively provided with a sliding groove 29, the inner side wall of the sliding groove 29 is in sliding connection with a connecting frame 28, the inner side wall of the connecting frame 28 is movably connected with a roller 6 through a rotating shaft, the rotating shaft is fixedly arranged in the connecting frame 28, the roller 6 is movably sleeved on the outer surface of the rotating shaft through a central perforation so that the roller 6 rotates by taking the rotating shaft as the center, the two rollers 6 are respectively and slidably connected with the back side walls of the first connecting plate 2 and the second connecting plate 3, the two connecting frames 28 are respectively and symmetrically arranged on the upper side wall and the lower side wall of the supporting plate 5, the two rollers 6 are respectively arranged on the upper side surface and the lower side surface of the supporting plate 5 through the two connecting frames 28, the wiping block 23 is fixedly arranged on the left side wall of the supporting plate 5, the wiping block 23 is slidingly connected on the right side wall of the green plate body 1, when the green plate is used, when a wrong character is written or the green plate surface needs to be cleaned, the supporting plate 5 is moved, the wiping block 23 is driven to be attached to the green plate surface to slide, the handwriting on the green plate surface is cleaned through the wiping block 23, the operation process is more convenient, when the supporting plate 5 drives the wiping block 23 to move, the connecting frames 28 on the two sides are driven to be attached to the inside of the sliding groove 29, the rollers 6 are driven to be respectively attached to the back surfaces of the first connecting plate 2 and the second connecting plate 3 through the connecting frames 28 to move, the stability of the moving process of the wiping block 23 is ensured by the two rollers 6, and the effect of handwriting cleaning is improved.

Specifically, the screw seat 30 is fixedly mounted on the side wall of the support plate 5, the clamping bolt 31 is connected to the inner side wall of the screw seat 30 in a threaded manner, and when the wiping block 23 is not used, the clamping bolt 31 is propped against the upper surface of the second connecting plate 3 by rotating the clamping bolt 31, so that the position of the wiping block 23 is locked, the sliding of the wiping block 23 is prevented, and convenience is brought to the operation process.

Specifically, the right side wall of the supporting plate 5 is provided with the buckling handle 32, and the buckling handle 32 drives the supporting plate 5 to move, so that the operation of the green plate wiping process is more convenient.

Specifically, the lower lateral wall symmetry of first connecting plate 2 is connected with unreel roller 8 through supporting shoe 7 rotation, unreel roller 8's lateral wall winding has curtain 33, two supporting shoe 7 that are parallel to each other of vertical fixation of symmetry around the lower surface of first connecting plate 2, the embedding installation bearing of symmetry respectively at the opposite face of two supporting shoe 7, unreel roller 8's both ends axis body imbeds respectively in the inside of supporting shoe 7 bearing, guarantee unreel roller 8 can stable horizontal rotation, unreel roller 8's surface winding curtain 33, can project through curtain 33, bring convenience for the teaching, can install the rolling spring in unreel roller 8 both ends axis body department, realize automatic rolling.

Specifically, a hook 35 is fixedly installed at one end of the curtain 33, a clamping ring 34 is fixedly installed on the front side wall of the second connecting plate 3 through a fixing block 36, the clamping ring 34 corresponds to the hook 35, when the curtain 33 is used, after the curtain 33 is stretched open, the hook 35 is hung on the clamping ring 34, then the curtain is put in through a projector, and the curtain is not supported by hands, so that convenience is brought to an operation process.

Specifically, the baffle 4 is fixedly installed on the right side wall of the second connecting plate 3, and the groove cavity formed by the baffle 4 and the second connecting plate 3 is used for storing writing pens, so that convenience is brought to a user.

The embodiment is an adjustable green board for teaching, and theory of operation is: when in use, the screw rod 14 is rotated, the screw rod 14 moves along the outer surface of the screw rod 14 through the threads on the outer surface when in rotation, the movable seat 25 moves, when in movement, the movable seat 25 drives one end of the hinged transmission rod 24 through the first connecting seat 11, the other end of the transmission rod 24 drives the hinged second connecting seat 27 to move, the second connecting seat 27 drives the green board body 1 to move at a position close to the lower end, the green board body 1 rotates by taking the fixed shaft 13 as a center through the rotating seat 10, make green board body 1 along with the rotation and angle regulation of lead screw 14, adjust green board to suitable angle of writing through rotating lead screw 14, reverse rotation lead screw 14 after the use is accomodate the green board on laminating wall's position, reduce occupation space, be convenient for accomodate, when green board body 1 passes through lead screw 14 angle regulation, second connecting block 22 drives movable block 21 laminating and slides at slide bar 18's surface, support green board body 1 through two movable blocks 21 of green board body 1 lower surface, thereby guaranteed green board body 1 in the steadiness of use.

Example 2

When the green board is used, as shown in fig. 1 and 2, when wrong writing is performed or cleaning is performed on the surface of the green board, the supporting plate 5 is moved, so that the supporting plate 5 drives the wiping block 23 to be attached to the surface of the green board to slide, the writing on the surface of the green board is cleaned through the wiping block 23, the operation process is more convenient, when the supporting plate 5 drives the wiping block 23 to move, the supporting plate 5 drives the connecting frames 28 on two sides to be attached to the sliding groove 29 to slide, the connecting frames 28 drive the rollers 6 to be attached to the opposite surfaces of the first connecting plate 2 and the second connecting plate 3 respectively to move, the stability of the movement process of the wiping block 23 is guaranteed through the two rollers 6, and when the wiping block 23 is not used, the clamping bolt 31 is pushed against the upper surface of the second connecting plate 3, so that the position of the wiping block 23 is locked, and the sliding of the wiping block 23 is prevented.

Example 3

The utility model provides an adjustable green board is used in teaching, as shown in fig. 1 and fig. 2, twine curtain 33 at the surface of unreeling roller 8, can project through curtain 33, can install the rolling spring in the axis body department at unreeling roller 8 both ends, realize automatic rolling, stretch back with curtain 33, hang couple 35 on snap ring 34, then put in through the projecting apparatus, need not hold by the hand, bring convenience for the operation process.

Claims (8)

1. The utility model provides an adjustable green board is used in teaching, includes green board body (1), its characterized in that: the left side wall of the green plate body (1) is fixedly provided with a rotating seat (10), the rotating seat (10) is movably connected with the outer side wall of a fixed shaft (13), the fixed shaft (13) is fixedly arranged on the inner side wall of a fixed seat (12), the fixed seat (12) is fixedly arranged on the side wall of a wall body (9), the lower side wall of the green plate body (1) is symmetrically fixedly provided with a first connecting block (40), the inner cavity of the first connecting block (40) is rotationally connected with a sleeve (38), the inner side wall of the sleeve (38) is slidingly connected with a sliding block (39), the side wall of the sliding block (39) is fixedly provided with one end of a movable rod (19), the other end of the movable rod (19) is rotationally connected with a second connecting block (22), the second connecting block (22) is fixedly arranged on the upper side wall of the movable block (21), the movable block (21) is slidingly connected with the outer side wall of a sliding rod (18), the two sliding rods (18) are symmetrically fixedly arranged on the right side wall of the wall body (9), the side wall body (9) is rotationally connected with a first screw (25) through a screw rod (14) which is rotationally connected with the side wall (25), the inner cavity of the first connecting seat (11) is rotationally connected with one end of a transmission rod (24) through a rotating shaft, the other end of the transmission rod (24) is rotationally connected with a second connecting seat (27) through the rotating shaft, and the second connecting seat (27) is fixedly arranged on the left side wall of the green board body (1).

2. An adjustable green board for teaching according to claim 1, characterized in that two opposite side walls of two mounting seats (17) are respectively symmetrically and fixedly provided with two ends of a guide rod (15), a left side wall of the movable seat (25) is fixedly provided with a guide block (16), and the guide block (16) is slidably connected with an outer side wall of the guide rod (15).

3. The teaching is with adjustable green board according to claim 1, characterized in that, right side wall of green board body (1) symmetry respectively fixed mounting have first connecting plate (2) and second connecting plate (3), spout (29) have all been seted up to first connecting plate (2) with the inner chamber of second connecting plate (3), inside wall sliding connection of spout (29) has link (28), the inside wall of link (28) has gyro wheel (6) through pivot swing joint, two gyro wheel (6) sliding connection respectively be in first connecting plate (2) with the back of the body lateral wall of second connecting plate (3), two fixed mounting that link (28) symmetry respectively are in upper and lower both sides wall of backup pad (5), the left side wall fixed mounting of backup pad (5) has wiper block (23), wiper block (23) sliding connection is in the right side wall of green board body (1).

4. An adjustable green plate for teaching according to claim 3, characterized in that the side wall of the supporting plate (5) is fixedly provided with a screw seat (30), and the inner side wall of the screw seat (30) is in threaded connection with a clamping bolt (31).

5. An adjustable green board for teaching according to claim 3, characterized in that the right side wall of the supporting board (5) is provided with a clasp (32).

6. An adjustable green board for teaching according to claim 3, characterized in that the lower side wall of the first connecting plate (2) is symmetrically connected with an unreeling roller (8) through a supporting block (7) in a rotating way, and the outer side wall of the unreeling roller (8) is wound with a curtain (33).

7. The teaching adjustable green board according to claim 6, wherein a hook (35) is fixedly installed at one end of the curtain (33), a clamping ring (34) is fixedly installed on the front side wall of the second connecting plate (3) through a fixing block (36), and the clamping ring (34) corresponds to the hook (35).

8. An adjustable green board for teaching according to claim 3, characterized in that the right side wall of the second connecting board (3) is fixedly provided with a baffle (4).