阅读说明：本技术 教学黑板 (Teaching blackboard ) 是由 王杰 赵志明 龙旭东 于 2020-12-29 设计创作，主要内容包括：本申请涉及一种教学黑板,悬挂于墙体,该教学黑板包括：显示屏；至少一对书写黑板,设置于显示屏的侧部,一对书写黑板包括层叠设置的第一黑板和第二黑板,第一黑板位于第二黑板的书写表面一侧,第二黑板背离其书写表面的一侧与墙体相对设置；其中,教学黑板具有第一状态和第二状态,教学黑板处于第一状态时,至少一对书写黑板位于显示屏的侧部,且第一黑板与显示屏平齐设置；教学黑板处于第二状态时,至少一对书写黑板中的第一黑板移动至显示屏的显示表面一侧并遮挡显示屏,且第二黑板与第一黑板平齐设置。该教学黑板在实现交互式显示屏的教学效果的同时,还可以满足书写黑板的大面积使用要求。(The application relates to a teaching blackboard hangs in the wall body, and this teaching blackboard includes: a display screen; the pair of writing blackboards comprises a first blackboard and a second blackboard which are arranged in a stacked mode, the first blackboard is located on one side of the writing surface of the second blackboard, and one side, away from the writing surface, of the second blackboard is opposite to the wall; the teaching blackboard is provided with a first state and a second state, when the teaching blackboard is in the first state, at least one pair of writing blackboards are positioned on the side part of the display screen, and the first blackboards are arranged in parallel and level with the display screen; when the teaching blackboard is in the second state, the first blackboard in at least a pair of writing blackboards moves to the display surface one side of display screen and shelters from the display screen, and the second blackboard sets up with first blackboard parallel and level. The teaching blackboard can meet the requirement of large-area use of a writing blackboard while realizing the teaching effect of the interactive display screen.)

1. The utility model provides a teaching blackboard, hangs in wall body (W), its characterized in that, teaching blackboard includes:

a display screen (20);

the pair of writing blackboards (10) is arranged on the side portion of the display screen (20), each pair of writing blackboards (10) comprises a first blackboard (1) and a second blackboard (2) which are arranged in a stacked mode, the first blackboards (1) are located on one sides of writing surfaces of the second blackboards (2), and one sides, deviating from the writing surfaces, of the second blackboards (2) are opposite to the wall body (W);

the teaching blackboard is provided with a first state and a second state, when the teaching blackboard is in the first state, the at least one pair of writing blackboards (10) are positioned on the side part of the display screen (20), and the first blackboard (1) and the display screen (20) are arranged in parallel and level; the teaching blackboard is in during the second state, at least a pair of in writing blackboard (10) first blackboard (1) remove extremely display surface one side of display screen (20) is sheltered from display screen (20), just second blackboard (2) with first blackboard (1) parallel and level sets up.

2. An educational blackboard according to claim 1, characterized in that it comprises a pair of writing blackboards (10) located on either side of the length direction or width direction of the display screen (20);

or the teaching blackboard comprises two pairs of writing blackboards (10) which are respectively positioned on two sides of the display screen (20) in the length direction or the width direction.

3. The teaching blackboard of claim 1 or 2, wherein the pair of writing blackboards (10) further includes a sliding mechanism (3), the sliding mechanism (3) set up in first blackboard (1), second blackboard (2) reach between display screen (20) second blackboard (2) with when display screen (20) parallel and level set up, sliding mechanism (3) are used for driving first blackboard (1) move along first direction (X) extremely display surface one side of display screen (20) is sheltered from display screen (20), first direction (X) is any one of the width direction or the length direction of display screen (20).

4. An educational blackboard according to claim 3, characterised in that the sliding mechanism (3) comprises:

a first slide rail (31) having a first groove (311) extending in the first direction (X) and connected to an edge of the second blackboard (2) on a side facing away from the writing surface thereof;

a second slide rail (32) having a second groove (321) extending in the first direction (X) and connected to an edge of a side of the display screen (20) facing away from the display surface thereof;

the moving piece (33) comprises a moving frame (331) and a movable trolley (332) arranged on the moving frame (331), the moving frame (331) is connected with the edge of one side, away from the writing surface, of the first blackboard (1), and the movable trolley (332) can be embedded into the first groove (331) of the first sliding rail (31) or the second groove (332) of the second sliding rail (32).

5. An educational blackboard according to claim 3, wherein the pair of writing blackboards (10) further includes a pushing mechanism (4), the pushing mechanism (4) is disposed between the second blackboard (2) and the wall (W) for pushing the second blackboard (2) to move in a direction away from the wall (W).

6. An educational blackboard according to claim 5, characterised in that the pushing mechanism (4) comprises:

the fixed bracket (44) is fixedly connected with the wall body (W);

one end of the limiting clamping piece (45) is fixedly connected with the second blackboard (2), and the other end of the limiting clamping piece is provided with a clamping part (451);

the rotating assembly (40) is telescopically arranged between the fixed support (44) and the limiting clamping piece (45), the rotating assembly (40) can be connected with the clamping portion (451) in a clamping mode to form N gears, and when the rotating assembly (40) is located at the first gear, the first blackboard (1) and the display screen (20) are arranged in a flush mode; when the rotating assembly (40) is located at the Nth gear, the second blackboard (2) is flush with the first blackboard (1), wherein N is an integer greater than 2.

7. An educational blackboard according to claim 6, characterised in that the rotation assembly (40) comprises:

the first shaft (41) is provided with a first end (41a) and a second end (41b) which are opposite, the first end (41a) is elastically connected with the fixed bracket (44), the second end (41b) is elastically connected with the limit clamping piece (45), and the peripheral surface of the first shaft (41) is provided with curved grooves (411) which are continuously distributed along the circumferential direction;

the second shaft (42) is sleeved on the outer peripheral side of the first shaft (41) and is connected with the fixing support (44), and fixing holes (420) distributed at intervals along the circumferential direction and N arc-shaped flanges sequentially distributed at intervals along the axial direction are formed in the outer peripheral surface of the second shaft (42);

a sliding part (43) with one end passing through the fixing hole (420) of the second shaft (42) and fixedly connected with the second shaft (42) and the other end embedded in the curved groove (411) of the first shaft (41);

slider (43) follow when curve recess (411) remove drive second axle (42) for first axle (41) rotate, make joint portion (451) can respectively with N arc flange joint is connected, in order to form respectively N gear.

8. An educational blackboard according to claim 7, wherein the curved groove (411) comprises peaks (f) and valleys (g) distributed alternately along the outer circumference of the first shaft (41), the peaks (f) being disposed towards the first end (41a) and the valleys (g) being disposed towards the second end (41b), the slider (43) being moved from one valley (g) to the other trough (g) via the peaks (f) when the rotary assembly (40) is switched between adjacent gears.

9. An educational blackboard according to claim 8, wherein the number of shift positions of the rotating assembly (40) is M, the curved groove (411) includes 2M of the peaks (f) and 2M of the valleys (g), the central angle of at least one of the arc flanges is 360/2M, and the number of the fixing holes (420) and the sliding members (43) is M or 2M, where M is N-1 and is an integer greater than 1.

10. An educational blackboard according to claim 8, wherein the second shaft (42) has a first flange (421), a second flange (422) and a third flange (423) axially spaced in sequence on the outer peripheral surface thereof, the first flange (421) corresponding to the first end (41a), the third flange (423) corresponding to the second end (41b), and the fixing hole (420) is located between the first flange (421) and the second flange (422);

the first flange (421) and the second flange (422) are arc-shaped pieces with central angles of 90 degrees and are distributed in a staggered mode along the circumferential direction of the second shaft (42), and the third flange (423) is an annular piece distributed along the circumferential direction of the second shaft (42);

the clamping portion (451) can be respectively connected with the first flange (421), the second flange (422) and the third flange (423) in a clamping mode to form a first gear, a second gear and a third gear.

11. An educational blackboard according to claim 7, wherein the rotation assembly (40) further includes a first elastic member (46) and a second elastic member (47), the first elastic member (46) being disposed between the first end (41a) of the first shaft (41) and the fixed bracket (44), the second elastic member (47) being disposed between the second end (41b) of the first shaft (41) and the pressing plate (452);

the second end (41b) is provided with a polygonal column (412), and the second elastic piece (47) is correspondingly provided with a polygonal groove (471) matched with the polygonal column (412).

12. An educational blackboard according to claim 5, further comprising a buffering mechanism (5) between the second blackboard (2) and the wall (W), the buffering mechanism (5) being disposed on the peripheral side of the pushing mechanism (4);

the buffer mechanism (5) comprises at least two shear type stretchable mechanisms, and each shear type stretchable mechanism comprises two rod pieces and a damping telescopic rod which are arranged in a crossed mode; or the buffer mechanism (5) comprises a plurality of damping telescopic rods.

13. An educational blackboard according to claim 5, characterised in that the pushing mechanism (4) comprises:

one end of the automatic telescopic rod is fixedly connected with the wall body (W), and the other end of the automatic telescopic rod is fixedly connected with the second blackboard (2);

and the controller is electrically connected with the automatic telescopic rod and the sliding mechanism (3) respectively.

Technical Field

The invention relates to the technical field of teaching equipment, in particular to a teaching blackboard.

Background

Along with the development and popularization of science and technology education, most of teaching blackboards in classrooms are provided with multimedia interactive display screens. The outer panel of the interactive display screen is generally made of toughened glass, the surface of the interactive display screen has certain chalk writing performance, a writing blackboard can be replaced sometimes, however, the writing effect is poor, and students sitting at the rear side of a classroom or a light reflecting position may not clearly see written characters. In order to improve the learning experience of students, a blackboard for chalk writing can be only installed on the side edge of the interactive display screen, but the writing blackboard has smaller area due to limited space and does not meet the writing area requirement of educators.

Disclosure of Invention

The embodiment of the invention aims to provide a teaching blackboard which can meet the requirement of large-area use of a writing blackboard while realizing the teaching effect of an interactive display screen.

On one hand, the embodiment of the invention provides a teaching blackboard which is hung on a wall body, and the teaching blackboard comprises: a display screen; the pair of writing blackboards comprises a first blackboard and a second blackboard which are arranged in a stacked mode, the first blackboard is located on one side of the writing surface of the second blackboard, and one side, away from the writing surface, of the second blackboard is opposite to the wall body; the teaching blackboard is provided with a first state and a second state, when the teaching blackboard is in the first state, at least one pair of writing blackboards are positioned on the side part of the display screen, and the first blackboard and the display screen are arranged in parallel; when the teaching blackboard is in the second state, the first blackboard in at least a pair of writing blackboards moves to the display surface one side of display screen and shelters from the display screen, and the second blackboard sets up with first blackboard parallel and level.

According to an aspect of an embodiment of the present invention, the teaching blackboard includes a pair of writing blackboards located on either side of a length direction or a width direction of the display screen; or the teaching blackboard comprises two pairs of writing blackboards which are respectively positioned on two sides of the display screen in the length direction or the width direction.

According to an aspect of the embodiment of the present invention, the pair of writing blackboards further includes a sliding mechanism, the sliding mechanism is disposed between the first blackboard, the second blackboard, and the display screen, and when the second blackboard is disposed flush with the display screen, the sliding mechanism is configured to drive the first blackboard to move to one side of the display surface of the display screen along a first direction and shield the display screen, where the first direction is any one of a width direction and a length direction of the display screen.

According to an aspect of an embodiment of the present invention, a slide mechanism includes: the first sliding rail is provided with a first groove extending along a first direction and is connected with the edge of one side of the second blackboard, which is far away from the writing surface of the second blackboard; the second sliding rail is provided with a second groove extending along the first direction and is connected with one side edge of the display screen, which is deviated from the display surface of the display screen; the moving member, including removing the frame and setting up the activity dolly on removing the frame, remove the edge connection of one side that deviates from its writing surface of frame and first blackboard, the second recess of first recess or second slide rail that the activity dolly can imbed first slide rail in.

According to an aspect of an embodiment of the present invention, the pair of writing blackboards further includes a pushing mechanism disposed between the second blackboard and the wall for pushing the second blackboard to move in a direction away from the wall.

According to an aspect of an embodiment of the present invention, the pushing mechanism includes: the fixed bracket is fixedly connected with the wall; one end of the limiting clamping piece is fixedly connected with the second blackboard, and the other end of the limiting clamping piece is provided with a clamping part; the rotating assembly is telescopically arranged between the fixed support and the limiting clamping piece and can be clamped and connected with the clamping part to form N gears respectively, and when the rotating assembly is positioned at a first gear, the first blackboard and the display screen are arranged in parallel and level; when the rotating assembly is located at the Nth gear, the second blackboard and the first blackboard are arranged in a flush mode, wherein N is an integer larger than 2.

According to one aspect of an embodiment of the present invention, a rotating assembly includes: the first shaft is provided with a first end and a second end which are opposite, the first end is elastically connected with the fixed support, the second end is elastically connected with the limiting clamping piece, and the peripheral surface of the first shaft is provided with curved grooves which are continuously distributed along the circumferential direction; the second shaft is sleeved on the outer peripheral side of the first shaft and is connected with the fixing support, and fixing holes which are distributed at intervals along the circumferential direction and N arc-shaped flanges which are sequentially distributed at intervals along the axial direction are arranged on the outer peripheral surface of the second shaft; one end of the sliding piece penetrates through the fixing hole of the second shaft and is fixedly connected with the second shaft, and the other end of the sliding piece is embedded into the curved groove of the first shaft; wherein, the slider drives the second shaft and rotates for the primary shaft when moving along the curve recess for joint portion can be connected with N arc flange joint respectively, in order to form N gears respectively.

According to an aspect of the embodiment of the present invention, the curved groove includes peaks and valleys alternately distributed along the outer circumferential surface of the first shaft, the peaks being disposed toward the first end, and the valleys being disposed toward the second end; when the rotating assembly is switched between adjacent gears, the sliding piece moves from one wave trough to the other wave trough through the wave crests.

According to an aspect of an embodiment of the present invention, the number of shift positions of the rotating assembly is M, the curved groove of the first shaft includes 2M wave crests and 2M wave troughs, a central angle of at least one of the arc-shaped flanges is 360/2M, and the number of the fixing holes and the sliding members is M or 2M, where M is N-1 and is an integer greater than 1.

According to one aspect of the embodiment of the invention, the outer peripheral surface of the second shaft is provided with a first flange, a second flange and a third flange at intervals in sequence along the axial direction, the first flange corresponds to the first end, the third flange corresponds to the second end, and the fixing hole is positioned between the first flange and the second flange; the first flange and the second flange are arc-shaped pieces with central angles of 90 degrees and are distributed in a staggered mode along the circumferential direction of the second shaft, and the third flange is a ring-shaped piece distributed along the circumferential direction of the second shaft; the clamping portion can be connected with the first flange, the second flange and the third flange in a clamped mode respectively to form a first gear, a second gear and a third gear respectively.

According to an aspect of an embodiment of the present invention, the rotating assembly further includes a first elastic member disposed between the first end of the first shaft and the fixed bracket, and a second elastic member disposed between the second end of the first shaft and the pressing plate; the second end is provided with a polygonal column, and the second elastic piece is correspondingly provided with a polygonal groove matched with the polygonal column.

According to an aspect of an embodiment of the present invention, the teaching blackboard further includes a buffer mechanism between the second blackboard and the wall body, the buffer mechanism being disposed on a peripheral side of the pushing mechanism. The buffer mechanism comprises at least two shear type stretchable mechanisms, and each shear type stretchable mechanism comprises two rods which are arranged in a crossed manner and a damping telescopic rod; or the buffer mechanism comprises a plurality of damping telescopic rods.

According to an aspect of an embodiment of the present invention, the pushing mechanism includes: one end of the automatic telescopic rod is fixedly connected with the wall body, and the other end of the automatic telescopic rod is fixedly connected with the second blackboard; and the controller is electrically connected with the automatic telescopic rod and the sliding mechanism respectively.

The teaching blackboard provided by the embodiment of the invention comprises a display screen and at least one pair of writing blackboards arranged on the side part of the display screen, wherein the pair of writing blackboards comprises a first blackboard and a second blackboard which are arranged in a stacked mode, and the first blackboard is positioned on one side of the writing surface of the second blackboard. When the teaching blackboard is in a first state, at least one pair of writing blackboards are positioned on the side part of the display screen, and the first blackboards are arranged in parallel with the display screen; when the teaching blackboard is in the second state, the first blackboard in at least a pair of writing blackboards moves to the display surface one side of display screen and shelters from the display screen, and the second blackboard sets up with first blackboard parallel and level. Because the teaching blackboard can both make the surface of writing wholly keep the parallel and level setting at any state, the outward appearance is pleasing to the eye, can not appear the vision and be disconnected poor, when realizing the teaching effect of interactive display screen, can also satisfy the large tracts of land operation requirement of writing the blackboard, has improved educator and learner's use and has experienced.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, like parts are provided with like reference numerals. The drawings are not drawn to scale.

FIG. 1 is a schematic structural diagram of a teaching blackboard provided according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the teaching blackboard shown in FIG. 1;

FIG. 3 is a schematic structural view showing another teaching blackboard provided according to an embodiment of the present invention;

FIG. 4 is a schematic view showing a changed state of the teaching blackboard shown in FIG. 1;

FIG. 5 is an enlarged schematic view showing a region A in the teaching blackboard shown in FIG. 2;

FIG. 6 is a schematic view showing an assembly effect of the sliding mechanism shown in FIG. 5;

fig. 7 shows an enlarged structural view of a region B in fig. 6;

fig. 8 is a schematic view showing the construction of a push-pull mechanism in the teaching blackboard shown in fig. 5;

FIG. 9 shows an exploded view of the push-pull mechanism shown in FIG. 8;

FIG. 10 shows a structural schematic view of a curvilinear groove of the first shaft in the rotating assembly shown in FIG. 9;

FIG. 11 is a schematic structural view of the push-pull mechanism shown in FIG. 8 in a different gear position;

FIG. 12 is a schematic view illustrating an assembly effect of the damper mechanism shown in FIG. 5;

fig. 13 is a schematic view showing an assembly effect of the damper mechanism shown in fig. 5.

Description of reference numerals:

10-writing blackboard; 20-a display screen; w-a wall body; x-a first direction; y-a second direction;

1-a first blackboard; 2-a second blackboard; 3-a sliding mechanism; 4-a pushing mechanism; 5-a buffer mechanism;

31-a first slide rail; 311-a first groove; 32-a second slide rail; 321-a second groove; 33-a moving member; 331-a mobile frame; 332-a mobile trolley;

40-a rotating assembly; 41-a first shaft; 41 a-first end; 41 b-second end; 411-curved groove; 412-polygonal columns; f-wave crest; g-wave trough;

42-a second axis; 420-fixing holes; 421-first flange 421; 422-a second flange; 423-third flange;

43-a slide; 44-a fixed support; 45-limit clamping pieces; 451-a snap-in part; 452-a press plate; 453-a stopper; 46-a first resilient member; 47-second elastic member.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating the examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the teaching blackboard of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

For better understanding of the present invention, a teaching blackboard provided by an embodiment of the present invention will be described in detail below with reference to fig. 1 to 13.

Referring to fig. 1 to 3 together, a teaching blackboard provided in an embodiment of the present invention is suspended on a wall W, and includes: at least one pair of a writing blackboard 10 and a display screen 20.

The display screen 20 is a multimedia interactive display screen for playing teaching videos. The surface of the display screen 20 is toughened glass with a certain chalk writing function. When the teaching worker plays the teaching video, the teaching video can be paused in order to deepen the understanding of students, and the comments are written by chalk aiming at the pictures or characters in the teaching video on the surface of the display screen 20, so that the teaching quality is improved.

At least a pair of blackboard 10 of writing sets up in the lateral part of display screen 20, and a pair of blackboard 10 of writing is including first blackboard 1 and the second blackboard 2 that range upon range of setting, and first blackboard 1 is located writing surface one side of second blackboard 2, and second blackboard 2 deviates from its one side of writing surface and wall body W and sets up relatively. The first black board 1 and the second black board 2 are conventional black boards suitable for chalk writing, and the writing effect thereof is better than that of the tempered glass surface of the display screen 20.

The teaching blackboard has a first state and a second state, when the teaching blackboard is in the first state, at least one pair of writing blackboards 10 are positioned on the side part of the display screen 20, and the first blackboard 1 is arranged in parallel and level with the display screen 20; when the teaching blackboard is in the second state, the first blackboard 1 in at least one pair of writing blackboards 10 moves to one side of the display surface of the display screen 20 and shields the display screen 20, and the second blackboard 2 is arranged in parallel and level with the first blackboard 1.

As an alternative embodiment, the teaching blackboard includes two pairs of writing blackboards 10, which are respectively disposed at both sides of the display screen 20 in the length direction or the width direction. When the width direction of the classroom is sufficiently large, two pairs of writing blackboards 10 are located on both sides in the length direction of the display screen 20, as shown in fig. 1.

As an alternative embodiment, the teaching blackboard includes a pair of writing blackboards 10 on either side of the display screen 20 in the lengthwise direction or the widthwise direction. When the width of the classroom is insufficient and the height is high, the pair of writing blackboards 10 may be positioned on the lower side in the width direction of the display screen 20 as shown in fig. 3, in consideration of the height of the instructor and the like.

For convenience of description, the embodiment of the present invention is explained by taking the teaching blackboard shown in fig. 1 as an example. Fig. 4 is a schematic view showing a changed state of the teaching blackboard shown in fig. 1.

As shown in fig. 4(a), the teaching blackboard is in the first state, the first blackboard 1 of the two pairs of writing blackboards 10 is disposed flush with the display screen 20, and the second blackboard 2 is located behind the first blackboard 1 and is shielded. At this moment, the display screen 20 can display teaching videos, the first blackboards 1 on the two sides are used for writing, teaching workers can play the teaching videos conveniently, and meanwhile, the main points in the teaching videos are written on the first blackboards 1. When the display screen 20 closes the back black screen, the display screen 20 also can be used for simply writing, and because of first blackboard 1 and the setting of display screen 20 parallel and level, wholly pleasing to the eye, the student of sitting in the classroom both sides can not appear the disconnected difference in vision when watching display screen 20 and first blackboard 1, improves and uses experience.

As shown in fig. 4(b), the first blackboard 1 and the second blackboard 2 are moved forward in the directions indicated by the respective arrows, so that the second blackboard 2 located on the rear side is disposed flush with the display screen 20. Then, as shown in (c) of fig. 4, the two first blackboards 1 located on the front side are moved toward the display screen 20 in the directions shown by the respective arrows and block the display screen 20, respectively.

As shown in fig. 4(d), the two second blackboards 2 located at the rear side continue to move forward and are arranged flush with the two first blackboards 1, and the teaching blackboards are in the second state. The four blackboards used for writing are unfolded and spliced into a blackboard with a large area, so that the writing area of the teaching blackboard is enlarged, the writing requirements of teaching workers are met, and meanwhile, students sitting at all positions in a classroom can obtain good learning experience.

And when the teaching blackboard is required to be converted from the second state to the first state, the reverse operation is carried out according to the steps. Specifically, the second blackboard 2 in the second state is firstly retracted from the position in (d) to the position in (c) in the direction opposite to the arrow, then the first blackboard 1 is retracted from the position in (c) to the position in (b) in the direction opposite to the arrow, and then the first blackboard 1 and the second blackboard 2 are retracted from the positions in (b) in the direction opposite to the arrow to the position in (a), so that the second blackboard 2 is folded at the rear side of the first blackboard 1, and the teaching blackboard is converted into the first state.

Optionally, a buckle or a magnetic member is arranged between the side of the first blackboard 1 facing the display screen 20 and the display screen 20. When the teaching blackboard is in the first state, the first blackboard 1 and the display screen 20 are arranged in parallel, and the first blackboard 1 and the display screen 20 can be locked, so that a gap between the first blackboard 1 and the display screen 20 is kept at 0.5 Mm-1 Mm.

Optionally, a buckle or a magnetic piece is arranged between one side of the first blackboard 1 far away from the display screen 20 and the second blackboard 2. When the teaching blackboard is in the second state, the first blackboard 1 and the second blackboard 2 are arranged in parallel, and the first blackboard 1 and the second blackboard 2 can be locked, so that the gap between the first blackboard 1 and the second blackboard 2 is kept at 0.5 Mm-1 Mm.

The teaching blackboard provided by the embodiment of the invention comprises a display screen 20 and at least one pair of writing blackboards 10 arranged on the side part of the display screen 20, wherein the pair of writing blackboards 10 comprises a first blackboard 1 and a second blackboard 2 which are arranged in a stacked mode, and the first blackboard 1 is positioned on one side of the writing surface of the second blackboard 2. When the teaching blackboard is in a first state, at least one pair of writing blackboards 10 are positioned at the side part of the display screen 20, and the first blackboard 1 is arranged in parallel with the display screen 20; when the teaching blackboard is in the second state, the first blackboard 1 in at least one pair of writing blackboards 10 moves to one side of the display surface of the display screen 20 and shields the display screen 20, and the second blackboard 2 is arranged in parallel and level with the first blackboard 1. Because the teaching blackboard can both make the surface of writing wholly keep the parallel and level setting at any state, the outward appearance is pleasing to the eye, can not appear the vision and be disconnected poor, when realizing the teaching effect of interactive display screen, can also satisfy the large tracts of land operation requirement of writing the blackboard, has improved educator and learner's use and has experienced.

The specific structure of the teaching blackboard provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.

Fig. 5 is an enlarged schematic view showing a region a in the teaching blackboard shown in fig. 2.

As shown in fig. 5, the pair of writing blackboards 10 further includes a sliding mechanism 3, the sliding mechanism 3 is disposed between the first blackboard 1, the second blackboard 2, and the display screen 20, and when the second blackboard 2 is disposed flush with the display screen 20, the sliding mechanism 3 is configured to drive the first blackboard 1 to move to one side of the display surface of the display screen 20 along a first direction X and shield the display screen 20, and the first direction X is any one of a width direction and a length direction of the display screen 20. For convenience of description, the first direction X is taken as an example of the length direction of the display screen 20 in the embodiment of the present invention.

Optionally, the number of the sliding mechanisms 3 is two, and the two sliding mechanisms are respectively located on the upper side and the lower side of the first blackboard 1, the second blackboard 2 and the display screen 20 in the width direction, so that the stability of the first blackboard 1 moving from the second blackboard 2 to the display screen 20 along the first direction X is improved, and the first blackboard 1 is prevented from being clamped due to vertical offset.

It is understood that, when one or two pairs of the writing blackboards 10 are positioned in the width direction of the display screen 20, the first direction X is the width direction of the display screen 20, and the sliding mechanisms 3 are positioned on the left and right sides of the first blackboard 1, the second blackboard 2, and the display screen 20 in the longitudinal direction.

Fig. 6 is a schematic view showing an assembly effect of the sliding mechanism in the teaching blackboard shown in fig. 5, and fig. 7 is a schematic view showing an enlarged structure of a region B in fig. 6; .

As shown in fig. 6 and 7, the slide mechanism 3 includes a first slide rail 31, a second slide rail 32, and a moving member 33, the first slide rail 31 having a first groove 311 extending in the first direction X and being connected to an edge of the second blackboard 2 on a side facing away from the writing surface thereof; the second slide rail 32 has a second groove 321 extending along the first direction X, and is connected to an edge of the display screen 20 facing away from the display surface thereof; the moving member 33 includes a moving frame 331 and a movable trolley 332 disposed on the moving frame 331, the moving frame 331 is connected to an edge of a side of the first blackboard 1 facing away from the writing surface, and the movable trolley 332 can be inserted into the first groove 331 of the first slide rail 31 or the second groove 332 of the second slide rail 32.

The moving member 33 is connected to the first blackboard 1 via the moving frame 331, and is inserted into the first groove 311 of the first slide rail 31 fixedly connected to the second blackboard 2 via the movable carriage 332, so that the first blackboard 1 and the second blackboard 2 are stacked and integrated via the moving member 33. Alternatively, each sliding mechanism 3 includes at least two moving members 33, and at least four moving members 33 are used to bear the weight of the first blackboard 1. The side of the second blackboard 2 away from the writing surface is fixedly connected with the wall W to fix the pair of writing blackboards 10 to the wall W.

Further, when the second blackboard 2 is disposed flush with the display screen 20, the first groove 311 of the first slide rail 31 is aligned with the second groove 321 of the second slide rail 32, so that the movable trolley 332 of the movable member 33 can smoothly slide from the first groove 311 to the second groove 321, and the first blackboard 1 is driven to move from the front side of the second blackboard 2 to the front side of the display screen 20, as shown in (c) of fig. 4, or the first blackboard 1 is driven to move from the front side of the display screen 20 to the front side of the second blackboard 2.

It should be noted that the wall W according to the embodiment of the present invention further includes a frame fixedly connected to the wall W, and the frame is used for installing the writing blackboard 10, the display screen 20, and the like, and is not described again.

Fig. 8 is a schematic view showing the structure of the push-pull mechanism in the teaching blackboard shown in fig. 5, and fig. 9 is a schematic view showing the exploded structure of the push-pull mechanism shown in fig. 8.

Referring to fig. 4, 8 and 9, the pair of writing blackboards 10 further includes a pushing mechanism 4, and the pushing mechanism 4 is disposed between the second blackboard 2 and the wall W and used for pushing the second blackboard 2 to move in a direction away from the wall W. The pushing mechanism 4 may be in a manual operation mode or an electric operation mode to fold and unfold the writing blackboard 10. The embodiment of the present invention will be described by taking the pushing mechanism 4 in the manual operation mode as an example.

As shown in fig. 8, the pushing mechanism 4 includes a fixed bracket 44, a limit catch 45, and a rotating assembly 40.

The fixing bracket 44 is fixedly connected with the wall W. Specifically, the fixing bracket 44 includes first, second, and third plates 441, 442, 443 disposed in parallel and spaced apart, and a support plate 444 connected to the first, second, and third plates 441, 442, 443. The first plate 441 is fixed to the wall W, and the rotating element 40 is disposed between the second plate 442 and the third plate 443.

One end of the limit fastener 45 is fixedly connected with the second blackboard 2, and the other end is provided with a clamping part 451. Specifically, the limiting clip 45 includes a pressing plate 452 and a limiting member 453 connected to the pressing plate 452, a clipping portion 451 is provided at one end of the limiting member 453 away from the pressing plate 452, and the limiting clip 45 is fixedly connected to the second blackboard 2 through the pressing plate 452.

The rotating assembly 40 is telescopically arranged between the fixed support 44 and the limiting clamping piece 45, the rotating assembly 40 can be clamped and connected with the clamping portion 451 to form N gears respectively, and when the rotating assembly 40 is located at the first gear, the first blackboard 1 is arranged in parallel and level with the display screen 20; when the rotating component 40 is located at the Nth gear, the second blackboard 2 is flush with the first blackboard 1, wherein N is an integer greater than 2.

The structure and operation of the rotating assembly 40 will be described in detail with reference to fig. 9.

As shown in fig. 9, the rotating assembly 40 includes: a first shaft 41, a second shaft 42 and a slide 43.

The first shaft 41 has a first end 41a and a second end 41b opposite to each other, the first end 41a is elastically connected to the fixing bracket 44, the second end 41b is elastically connected to the limit stopper 45, and a curved groove 411 continuously distributed along the circumferential direction is formed on the outer circumferential surface of the first shaft 41.

The second shaft 42 is sleeved on the outer peripheral side of the first shaft 41 and connected with the fixing bracket 44, and fixing holes 420 distributed at intervals along the circumferential direction and N arc-shaped flanges sequentially distributed at intervals along the axial direction are arranged on the outer peripheral surface of the second shaft 42.

One end of the sliding member 43 passes through the fixing hole 420 of the second shaft 42 and is fixedly connected with the second shaft 42, and the other end is inserted into the curved groove 411 of the first shaft 41.

Alternatively, the fixing hole 420 on the outer peripheral surface of the second shaft 42 is a threaded hole, the sliding member 43 includes a fastening bolt and a rolling bearing, the fastening bolt is in threaded connection with the fixing hole 420 of the second shaft 42, and the rolling bearing is sleeved at one end of the fastening bolt far away from the nut, so that the rolling bearing can rotate relative to the fastening bolt. Thus, when the rolling bearing of the slider 43 is inserted into the curved groove 411 of the first shaft 41 and moves along the curved groove 411, the rolling bearing can rotate around the axial direction of the slider, so that the frictional resistance between the sliding bearing and the curved groove 411 is reduced, and the slider 43 is prevented from being clamped into the curved groove 411.

Wherein, slider 43 drives second axle 42 and rotates for primary shaft 41 when moving along curved groove 411 for joint portion 451 can be connected with N arc flange joint respectively, in order to form N gear respectively.

Fig. 10 shows a structural schematic diagram of the curvilinear grooves of the first shaft in the rotating assembly shown in fig. 9. As shown in fig. 9 and 10, the curved groove 411 includes peaks f and valleys g alternately distributed along the outer circumferential surface of the first shaft 41, the peaks f are disposed toward the first end 41a, the valleys g are disposed toward the second end 41b, and the slider 43 moves from one valley g to the other valley g via the peaks f when the rotary member 40 is switched between adjacent shift positions. In the process that the sliding part 43 moves back and forth between the wave trough g and the wave crest f, the second shaft 42 is driven to rotate relative to the first shaft 41, so that the clamping part 451 can be clamped and connected with different arc-shaped flanges respectively.

Since one end of the sliding member 43 is fixedly connected to the fixing hole 420 of the second shaft 42 and the other end is inserted into the curved groove 411 of the first shaft 41, the number of the sliding members 43 is at least two in order to keep the coaxial arrangement between the first shaft 41 and the second shaft 42 at all times. In addition, the number of times that the rotating assembly 40 needs to be switched from the first gear to the nth gear one by one is M-1, where M is an integer greater than 1. Each slider 43 needs to move between M peaks f and M valleys g, and the curved groove 411 needs at least 2M peaks f and 2M valleys g.

Alternatively, the number of the sliding pieces 43 is M, each sliding piece 43 experiences M wave crests f and M wave troughs g during the process of switching the shift position M times, and the curved groove 411 is only partially stressed, which is beneficial to improving the service life. Optionally, the number of the sliding members 43 is 2M, and each wave trough g is provided with one sliding member 43, so that the 2M sliding members 43 are uniformly distributed on the circumferential direction of the first shaft 41, the stress on the entire outer circumferential surface of the first shaft 41 is uniform, the coaxiality between the first shaft 41 and the second shaft 42 is also improved, and the second shaft 42 is prevented from being eccentric relative to the first shaft 41 to cause clamping stagnation of the rotating assembly 40, which affects the switching of the teaching blackboard between different states.

Thus, the number of shift positions of the rotating assembly 40 is M, the curved groove 411 includes 2M wave peaks f and 2M wave troughs g, the central angle of at least one of the arc-shaped flanges is 360/2M, and the number of the fixing holes 420 and the sliding members 43 is M or 2M, depending on the use requirement.

Optionally, in the push-pull mechanism 4 of the teaching blackboard provided in the embodiment of the present invention, the rotating assembly 40 has three gears, and the number of gear shifting times is two. I.e., N-3 and M-2. As shown in fig. 10, the curved groove 411 of the first shaft 41 includes 4 peaks f and 4 valleys g, and the number of the fixing holes 420 and the sliding members 43 is 2 or 4.

As shown in fig. 9, the outer peripheral surface of the second shaft 42 is provided with a first flange 421, a second flange 422, and a third flange 433 in this order along the axial direction at intervals, the first flange 421 corresponds to the first end 41a of the first shaft 41, the third flange 433 corresponds to the second end 41b, and the fixing hole 420 is located between the first flange 421 and the second flange 422. The first flange 421 and the second flange 422 are arc-shaped members with a central angle of 90 °, and are distributed in a staggered manner along the circumferential direction of the second shaft 42, and the third flange 423 is an annular member distributed along the circumferential direction of the second shaft 42. The clamping part 451 of the limit clamp 45 is respectively connected with the first flange 421, the second flange 422 and the third flange 423 in a clamping manner to form a first gear, a second gear and a third gear.

Therefore, a first gear is formed when the clamping portion 451 of the limiting clamping piece 45 is connected with the first flange 421 in a clamping mode, and after the second shaft 42 rotates the central angle of the first flange 421 relative to the first shaft 41 under the driving of the sliding piece 43, the clamping portion 451 is connected with the second flange 422 in a clamping mode to form a second gear. When the second shaft 42 is driven by the sliding member 43 to rotate relative to the first shaft 41 by the center angle of the second flange 422, the clamping portion 451 is connected with the third flange 423 in a clamping manner to form a third gear. The central angle of the first flange 421 and the central angle of the second flange 422 may be equal or different.

Further, the rotating assembly 40 further includes a first elastic member 46 and a second elastic member 47, the first elastic member 46 is disposed between the first end 41a of the first shaft 41 and the fixed bracket 44, and the second elastic member 47 is disposed between the second end 41b of the first shaft 41 and the pressing plate 452. The second end 41b is provided with a polygonal column 412, and the second elastic element 47 is correspondingly provided with a polygonal groove 471 matched with the polygonal column 412.

Alternatively, the polygonal column 412 provided at the second end 41b of the first shaft 41 is a rectangular column, the polygonal groove 471 corresponding to the second elastic member 47 is a rectangular groove, and the polygonal column 412 and the polygonal groove 471 are engaged with each other, so that the first shaft 41 is prevented from rotating during the movement of the pushing mechanism 4, and the second shaft 42 can rotate along with the movement of the sliding member 43 along the curved groove 411 of the first shaft 41, thereby achieving the switching between the shift positions.

In addition, as shown in fig. 10, if the sliding member 43 is located at the descending position between the front of the trough g and the crest f when the rotating member 40 is in a certain shift position, when the rotating member 40 needs to be switched to the next shift position, the sliding member 43 may be stuck to the next trough g when passing by the trough g, and cannot be located to the next trough g, which affects the shift position switching. Therefore, the axial distance between the first flange 421, the second flange 422 and the third flange 423 and the distance between the peak f and the valley g need to satisfy certain conditions, which are specifically as follows:

the axial distance between the first flange 421 and the second flange 422 along the second shaft 42 is d1, the axial distance between the second flange 422 and the third flange 423 along the second shaft 42 is d2, the sum of the distance h between the wave crest f and the wave trough g of the first shaft 41 along the axial direction and the diameter d of the sliding piece 43 is d3, and d3 is not less than d1, and d3 is not less than d 2. With this arrangement, it is ensured that the slider 43 can smoothly move from one valley g to the next valley g when the rotating assembly 40 is switched between the shift positions.

Alternatively, d1 is d2, so that the distance between each peak f and each valley g is equal, simplifying the process of machining the curved groove 411 of the first shaft 41. Meanwhile, the central angle of the first flange 421 is equal to the central angle of the second flange 422, so that the processing technology of the second shaft 42 is simplified.

Figure 11 shows a schematic view of the push-pull mechanism shown in figure 8 in a different gear position.

As shown in fig. 4 and 11, the pushing mechanism 4 is connected to the wall W through a fixing bracket 44 and connected to the second blackboard 2 of the pair of writing blackboards 10 through a limit stopper 45.

When the teaching blackboard is in the first state, the first blackboard 1 of the pair of writing blackboards 10 is flush with the display screen 20, the rotating assembly 40 is located at the first gear, and the clamping part 451 of the limit clamping piece 45 is clamped with the first flange 421 on the rotating assembly 40, as shown in fig. 9(a), and corresponding to fig. 4 (a).

When the operator pushes the pair of writing blackboards 10 toward the wall W in the arrow direction shown in fig. 11(a), the second blackboard 2 transmits the acting force to the wall W through the retractable rotating assembly 40, and pushes the rotating assembly 40 to switch from the first gear to the second gear under the reaction force of the wall W, so that the engaging portion 451 of the limit stopper 45 engages with the second flange 422 on the rotating assembly 40, and at this time, the second blackboard 2 moves in the direction away from the wall W and is disposed flush with the display screen 20, as shown in fig. 11(b), and corresponds to fig. 4 (b).

Then, the operator moves the first blackboard 1 to the display surface side of the display screen 20 by the slide mechanism 3 as described above, and shields the display screen 20, as shown in fig. 4 (c).

When the operator pushes the second blackboard 2 toward the wall W along the arrow direction shown in fig. 11(b), the second blackboard 2 transmits the acting force to the wall W through the retractable rotating assembly 40, and pushes the rotating assembly 40 to switch from the second gear to the third gear under the reaction force of the wall W, so that the clamping portion 451 of the limit clamping piece 45 is clamped to the third flange 423 on the rotating assembly 40, and at this time, the second blackboard 2 continues to move in the direction away from the wall W and is flush with the first blackboard 1, so that the teaching blackboard is in the second state, as shown in fig. 11(c), and corresponds to fig. 4 (d). When the teaching blackboard needs to be converted from the second state to the first state, a cycle can be completed according to the operations in the sequence of (c), (b) and (a) in fig. 11, and details are not repeated.

Optionally, the pushing mechanism 4 is disposed between the central position of the second blackboard 2 and the wall W, so that the operator only needs to press the central position of the second blackboard 2 or the central position of the first blackboard 1 each time to drive the pair of writing blackboards 10 to fold or unfold, and the operation is simple and easy to implement.

Fig. 12 is a schematic view showing an assembly effect of the buffer mechanism shown in fig. 5.

Referring to fig. 4 and 12, the blackboard for teaching provided in the embodiment of the present invention further includes a buffering mechanism 5 located between the second blackboard 2 and the wall W, and the buffering mechanism 5 is disposed on the peripheral side of the pushing mechanism 4.

Optionally, the damping mechanism 5 comprises a plurality of damping telescopic rods. Damping telescopic link includes hollow rod and sets up the compressible spring in hollow rod for provide the buffering effort, thereby can assist pushing mechanism 4 to drive second blackboard 2 or a pair of blackboard 10 of writing and remove along second direction Y, slow down the moving speed of second blackboard 2 or a pair of blackboard 10 of writing, avoid injuring the operator or causing the damage of other parts.

Fig. 13 is a schematic view showing an assembly effect of the damper mechanism shown in fig. 5.

The buffer mechanism 5 comprises at least two shear type stretchable mechanisms which are respectively arranged at two sides of the pushing mechanism 4 and can be positioned at the upper side, the lower side or the left side and the right side of the second blackboard 2. The scissor type stretchable mechanism comprises two rods which are arranged in a crossed mode and a damping telescopic rod. One end of each rod piece is connected with the wall body W, the other end of each rod piece is connected with the second blackboard 2, and the damping telescopic rods are arranged between one rod piece and the wall body W. The buffer mechanism 5 is relatively low in cost, and can assist the pushing mechanism 4 to drive the second blackboard 2 or the pair of writing blackboards 10 to move along the second direction Y, so that the moving speed of the second blackboard 2 or the pair of writing blackboards 10 is reduced, and the damage to operators or other parts is avoided.

As described above, the pushing mechanism 4 of the teaching blackboard according to the embodiment of the present invention may be in the manual operation mode or in the electric operation mode. Meanwhile, the movable trolley 332 in the sliding mechanism 3 can also be an electric trolley, so that the first blackboard 1 can be driven to automatically move between the first slide rail 31 of the second blackboard 2 and the second slide rail 32 of the display screen 20. The pushing mechanism 4 and the sliding mechanism 3 of the electrically operated mode are automatically controlled by a program to realize folding and unfolding of the writing blackboard 10.

Specifically, the pushing mechanism 4 includes an automatic telescopic rod and a controller. One end of the automatic telescopic rod is fixedly connected with the wall body W, and the other end of the automatic telescopic rod is fixedly connected with the second blackboard 2. The controller is respectively electrically connected with the automatic telescopic rod and the sliding mechanism 3.

The number of the automatic telescopic rods is a plurality, for example, 4, and the plurality of automatic telescopic rods are arranged between the peripheral side of the second black board 2 and the wall body W, so that the damping telescopic rods in fig. 11 are replaced, and a pushing mechanism in a manual operation mode is omitted. In the electric operation mode, the folding and unfolding processes of the blackboard 10 are as follows:

when the teaching blackboard is in a first state shown in fig. 4(a), the first blackboard 1 is arranged flush with the display screen 20; the controller controls the automatic telescopic rod to push the pair of writing blackboards 10 to automatically extend out for a first distance along a second direction Y far away from the wall body W, so that the second blackboard 2 is arranged in parallel with the display screen 20, and the second blackboard 2 and the display screen 20 are locked in an electromagnetic mode, as shown in fig. 4 (b); then the controller controls the movable trolley 332 of the sliding mechanism 3 to drive the first blackboard 1 to move to one side of the display surface of the display screen 20 along the first direction X, and to shield the display screen 20, as shown in fig. 4 (c); then the controller controls the automatic telescopic rod to push the second blackboard 2 to automatically extend for a second distance along the second direction Y, so that the second blackboard 2 is flush with the first blackboard 1, and the second blackboard 2 and the first blackboard 1 are locked in an electromagnetic mode to convert the teaching blackboard from the first state to the second state, as shown in fig. 4 (d). When the teaching blackboard needs to be converted from the second state to the first state, the automatic telescopic rod and the sliding mechanism 3 are controlled to drive the pair of writing blackboards to automatically return to the original position.

Optionally, the automatic telescopic rod is a gas spring or a screw rod controlled by a motor. Optionally, the controller is a remote controller, and the operator may perform the operation in various manners such as voice, pressing a shortcut key, and gesture.

Any one of the sliding mechanism 3, the push-pull mechanism 4, and the buffer mechanism 5 in the teaching blackboard according to the embodiment of the present invention may be used in a scene such as an electric door and an electric wardrobe, and is not limited to the teaching blackboard.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.