CN112009142A

CN112009142A - Push-pull blackboard

Info

Publication number: CN112009142A
Application number: CN202010943917.0A
Authority: CN
Inventors: 徐少权; 毛富强
Original assignee: SHANGHAI EDUTECH CO Ltd
Current assignee: SHANGHAI EDUTECH CO Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2020-12-01
Anticipated expiration: 2040-09-09
Also published as: CN112009142B

Abstract

The embodiment of the application provides a push-and-pull blackboard, which comprises an installation frame, a movable writing board, a push-and-pull mechanism and a turnover assembly. The movable writing board is provided with a writing board surface and a top edge of the board body which are perpendicular to each other, and the movable writing board is arranged in the mounting frame in a sliding mode; the push-pull mechanism comprises a driving wheel, a driven wheel and an annular transmission belt, wherein the driving wheel and the driven wheel are respectively arranged at two ends of the mounting frame, and the driving wheel is in transmission connection with the driven wheel through the annular transmission belt; the axis of the driving wheel is parallel to the surface of the writing board and is vertical to the sliding direction of the movable writing board; the annular transmission belt is connected with the top edge of the plate body; the first upset piece of upset subassembly is connected with the one end of installing frame, and the second upset piece is connected with the other end of installing frame, and endless drive turns over to turn over around first upset piece and second upset piece. The height of the annular transmission belt on the top edge of the board body is reduced, so that the transverse frame of the push-pull blackboard can be set to be narrower, and the problem that the transverse frame compresses the size of a writing area is well solved.

Description

Push-pull blackboard

Technical Field

The invention relates to the technical field of teaching aids, in particular to a push-pull blackboard.

Background

With the development of large screen display and touch control technology and the advancement of modern teaching, a multimedia blackboard which can realize smooth writing by using a common chalk and can also be used as multimedia display by using a large screen liquid crystal display is more and more widely applied to various industries, in particular to the field of education.

At present, a traditional multimedia blackboard is of a full-fixed type, namely a display screen capable of writing and displaying is adopted and is matched with a fixed writing board for use, however, writing on the display screen has the problem that writing fluency and display definition cannot be perfectly reflected, the problem is mainly caused by the fact that high roughness is needed for smooth writing, high glossiness is needed for clear display, and contradiction exists between the smooth writing and the display screen. Therefore, the existing semi-fixed automatic multimedia blackboard for multiple choices is provided with a writing board capable of moving left and right, the movable writing board can be driven to slide left and right to enter and exit through a driving device, the movable writing board is pulled out for a user to write when more writing is needed, the movable writing board is pushed forward when multimedia display is needed, a display screen is exposed for displaying, and the problem that the fully-fixed multimedia blackboard cannot smoothly write and clearly display is solved.

However, the existing semi-fixed automatic multimedia blackboard is driven by the annular transmission belt of the driving device, and the annular transmission belt matched with the driving wheel and the driven wheel has certain width, so the occupied space of the annular transmission belt in the vertical surface is more, and the annular transmission belt is arranged in the transverse frame of the blackboard, therefore, the transverse frame of the blackboard needs to be arranged to be wider than the width of the adaptive transmission belt, so that the transverse frame of the blackboard is too wide, the writing area is relatively reduced, and the visual effect is influenced.

Disclosure of Invention

The invention aims to provide a push-pull blackboard, which solves the problem that the size of a writing area is compressed due to too wide transverse frames of the existing semi-fixed automatic multimedia blackboard.

A push-pull blackboard comprising:

installing a frame;

the movable writing board is provided with a writing board surface and a top edge of the board body which are perpendicular to each other, and the movable writing board is arranged in the mounting frame in a sliding mode along the extending direction of the intersecting line of the top edge of the board body and the writing board surface;

the push-pull mechanism comprises a driving wheel, a driven wheel and an annular transmission belt, wherein one of the driving wheel and the driven wheel is arranged at one end of the mounting frame, the other one of the driving wheel and the driven wheel is arranged at the other end of the mounting frame, the annular transmission belt is wound on the driving wheel and the driven wheel, and the driving wheel is in transmission connection with the driven wheel through the annular transmission belt; the axis of the driving wheel is parallel to the surface of the writing board and is vertical to the sliding direction of the movable writing board; the annular transmission belt is connected with the top edge of the plate body;

the overturning assembly comprises a first overturning part and a second overturning part, the first overturning part is connected with one end of the mounting frame, the second overturning part is connected with the other end of the mounting frame, the annular transmission belt turns over and bypasses the first overturning part, and the annular transmission belt turns over and bypasses the second overturning part.

In one embodiment, the portion of the endless belt located between the first and second reversing elements is a reversing belt body connected to the top edge of the plate body, the reversing belt body has a top driving surface and a bottom driving surface opposite to each other, and the bottom driving surface forms an angle smaller than 90 ° with the top edge of the plate body.

In one embodiment, the endless belt is folded 90 ° around the first upturner member, the endless belt is folded 90 ° around the second upturner member, and the bottom driving surface is parallel to the top edge of the panel.

In one embodiment, the first and second flip members are parallel to each other and are each perpendicular to the tablet surface.

In one embodiment, the distance between the top driving surface and the top edge of the board is greater than or equal to the distance between the top driving surface and the bottom driving surface, and the distance between the top driving surface and the top edge of the board is less than or equal to the distance between the top side surface and the bottom side surface.

In one embodiment, the first and second flippers each abut the bottom drive surface.

In one embodiment, the push-pull blackboard further comprises a connecting piece, and the top edge of the blackboard body is connected with the annular transmission belt through the connecting piece.

In one embodiment, the connecting member includes a dial plate, a first clamping plate and a second clamping plate, the dial plate is connected to the top edge of the plate body, the annular transmission belt is clamped between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are respectively connected to the annular transmission belt, and an end of the dial plate, which is far away from the top edge of the plate body, is clamped between the first clamping plate and the annular transmission belt.

In one embodiment, a limiting groove is formed in one surface, facing the annular transmission belt, of the first clamping plate, and one end, far away from the top edge of the plate body, of the poking piece penetrates through the limiting groove.

In one embodiment, the push-pull blackboard further comprises a fixed writing board, a display screen, a movable frame and a driving mechanism, wherein the fixed writing board is arranged in the mounting frame, and the movable writing board slides relative to the fixed writing board; the fixed writing board is provided with a fixed writing surface parallel to the surface of the writing board, and the movable writing board and the display screen are positioned on one side of the fixed writing board, which is far away from the fixed writing surface;

the display screen set up in the movable frame, actuating mechanism set up in the installing frame, just actuating mechanism drives the movable frame is along the perpendicular to the direction of writing board face in slide in the installing frame, make the display surface activity of display screen with fixed writing surface coplane.

In one embodiment, the end of the movable writing board facing away from the top edge of the board body is slidably connected to the mounting frame in a direction perpendicular to the writing board surface, so that the writing board surface is movably coplanar with the fixed writing surface, and the top edge of the board body is slidably connected to the connecting piece.

In one embodiment, the driving mechanism includes at least two linear driving members, the mounting frame has two opposite mounting inner side walls, the movable frame has two movable outer side walls which are opposite to each other, at least one linear driving member is arranged between one mounting inner side wall and one movable outer side wall, at least one linear driving member is arranged between the other mounting inner side wall and the other movable outer side wall, one end of each linear driving member is connected with the mounting inner side wall, and the other end of each linear driving member is connected with the movable outer side wall.

In one embodiment, the extending direction of the linear driving member forms an angle larger than 0 ° with the display surface.

In one embodiment, the push-pull blackboard further comprises a corner mechanism, the corner mechanism comprises a corner plate, a stop plate and a first fastener, the corner plate comprises a first bending plate and a second bending plate which are connected, the first bending plate is connected with the movable frame, the stop plate is arranged on the second bending plate in a sliding mode, the first bending plate is provided with a first waist-shaped hole, the second bending plate is provided with a second waist-shaped hole, and the first fastener penetrates through the second waist-shaped hole and the first waist-shaped hole in sequence to enable the stop plate to be fastened on the second bending plate; one end of the linear driving piece is provided with a second fastener, the second fastener is located in the first waist-shaped hole, and the second fastener is clamped between the end of the stop plate and the inner wall of the first waist-shaped hole.

In one embodiment, the movable frame is movably abutted against one surface of the movable writing board, which is far away from the surface of the writing board, a first magnetic attraction piece is arranged on the movable frame, a second magnetic attraction piece is arranged on one surface of the movable writing board, which is far away from the surface of the writing board, and the first magnetic attraction piece and the second magnetic attraction piece are attracted with each other; the protruding spacing portion that is equipped with of inner wall of installing frame, deviating from of activity clipboard the one side of clipboard face with spacing portion activity butt.

In one embodiment, the movable writing board has a bottom edge opposite to the top edge of the board, the bottom edge of the board is slidably connected to the mounting frame, the top edge of the board is provided with a first lifting engaging member, the edge of the movable frame is provided with a second lifting engaging member, and when the movable frame abuts against the movable writing board, the first lifting engaging member and the second lifting engaging member are engaged with each other, so that a gap is formed between the bottom edge of the board and the mounting frame.

In one embodiment, the number of the movable writing boards is two, the annular transmission belt comprises two transmission belt bodies, the axis of the driving wheel and the axis of the driven wheel form a coaxial surface, the two transmission belt bodies are respectively positioned at two sides of the coaxial surface, the top edge of the board body of one movable writing board is connected with one transmission belt body, and the top edge of the board body of the other movable writing board is connected with the other transmission belt body; the two movable writing boards are movably abutted.

The push-pull blackboard has the advantages that the push-pull mechanism is arranged to drive the movable writing board to slide along the extending direction of the intersection line of the top edge of the blackboard body and the writing board surface, namely the movable writing board is driven to slide left and right, the annular transmission belt of the push-pull mechanism is connected to the top edge of the blackboard body, the annular transmission belt is arranged in the transverse edge frame of the push-pull blackboard, the axis of the driving wheel is perpendicular to the writing board surface and is perpendicular to the sliding direction of the movable writing board, therefore, the annular transmission belt wound on the driving wheel is perpendicular to the top edge of the blackboard body, the annular transmission belt is turned over through the first turning assembly and the second turning assembly, the top edge of the annular transmission belt on the top edge of the blackboard body is changed from being perpendicular to the top edge of the blackboard body to being inclined to be even parallel to the top edge of the blackboard body, the height of the annular, the problem of the horizontal frame compression writing area size of blackboard has been solved better.

Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic view showing a structure of a push-pull blackboard according to an embodiment;

FIG. 2 is a schematic structural view of a push-pull blackboard according to another embodiment;

FIG. 3 is an enlarged view of a portion of the push-pull blackboard shown in FIG. 2;

FIG. 4 is an enlarged view of a portion of the push-pull blackboard shown in FIG. 2 at the point B;

FIG. 5 is an enlarged view of a portion of the push-pull blackboard shown in FIG. 2 at the point C;

FIG. 6 is a schematic structural diagram of a connector according to an embodiment;

FIG. 7 is a schematic structural view of a push-pull blackboard according to yet another embodiment;

FIG. 8 is an enlarged partial view of the blackboard of FIG. 7 at the point D;

fig. 9 is a schematic structural view of a push-pull blackboard according to still another embodiment.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or a point connection; either directly or indirectly through intervening media, or may be an internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

As shown in fig. 1 and 2, a push-pull blackboard 10 includes a mounting frame 100, a movable writing board 200, a push-pull mechanism 300, and a flip assembly 400. The movable writing board 200 has a writing board surface 210 and a board top edge 220 which are perpendicular to each other, and the movable writing board 200 is slidably disposed in the mounting frame 100 along an extending direction of an intersection line of the board top edge 220 and the writing board surface 210; the push-pull mechanism 300 comprises a driving wheel 310, a driven wheel 320 and an annular transmission belt 330, wherein one of the driving wheel 310 and the driven wheel 320 is arranged at one end of the mounting frame 100, the other one is arranged at the other end of the mounting frame 100, the annular transmission belt 330 is wound around the driving wheel 310 and the driven wheel 320, and the driving wheel 310 is in transmission connection with the driven wheel 320 through the annular transmission belt 330; the axis of the driving wheel 310 is parallel to the writing board surface 210 and perpendicular to the sliding direction of the movable writing board 200; the endless belt 330 is attached to the top edge 220 of the plate body; referring to fig. 3 and 4, the turnover assembly 400 includes a first turnover member 410 and a second turnover member 420, the first turnover member 410 is connected to one end of the mounting frame 100, the second turnover member 420 is connected to the other end of the mounting frame 100, the endless belt 330 is turned over and bypasses the first turnover member 410, and the endless belt 330 is turned over and bypasses the second turnover member 420.

In this embodiment, the end of the movable writing board 200 facing away from the top edge 220 of the board body is slidably connected to the mounting frame 100. In one embodiment, the plane of the top edge 220 of the plate body is a horizontal plane. In this embodiment, the axis of the driving wheel 310 is parallel to the axis of the driven wheel 320. In this embodiment, the endless belt 330 is positioned above the plane of the top edge 220 of the plate body. In this embodiment, the push-pull mechanism 300 further includes a driving portion 340, and the driving portion 340 is in driving connection with the driving wheel 310 to drive the driving wheel 310 to rotate. In the present embodiment, the driving part 340 includes, but is not limited to, a driving motor and a combination structure of the driving motor and a decelerator. In this embodiment, the endless drive belt 330 is driven in a direction parallel to the top edge 220 of the board body and parallel to the tablet surface 210.

The push-pull blackboard 10 of the present invention has the advantages that the push-pull mechanism 300 is arranged to drive the movable writing board 200 to slide along the extending direction of the intersection line of the top edge 220 of the board body and the writing board surface 210, i.e. to drive the movable writing board 200 to slide left and right, the annular transmission belt 330 of the push-pull mechanism 300 is connected to the top edge 220 of the board body, the axis of the transmission surface driving wheel 310 is perpendicular to the writing board surface 210 and perpendicular to the sliding direction of the movable writing board 200, so that the annular transmission belt 330 wound around the driving wheel 310 is perpendicular to the top edge 220 of the board body, the annular transmission belt 330 is turned over by the first turning member 410 and the second turning member 420, the annular transmission belt 330 on the top edge 220 of the board body is changed from being perpendicular to the top edge 220 of the board body to being inclined to the top edge 220 of the board body, even being parallel, the horizontal frame of the push-pull blackboard 10 can be set to be narrow, so that the problem that the horizontal frame of the blackboard compresses the size of the writing area is solved well.

In one embodiment, the driving part 340, the driving wheel 310 and the driven wheel 320 are respectively sleeved with a protective box body outside to protect the driving wheel 310 and the driven wheel 320 and to prevent dust. In one embodiment, the endless transmission belt 330 is a polyester steel wire synchronous belt, which has high abrasion resistance, corrosion resistance, smooth transmission, no lubrication, no pollution, environmental protection and durability. In one embodiment, the driving wheel 310 and the driven wheel 320 are respectively provided with gears, and the inner annular surface of the annular transmission belt 330 is provided with transmission teeth, which is beneficial to improving the stability of connection between the driving wheel 310 and the driven wheel 320 and the annular transmission belt 330, and further improving the sliding operation stability of the movable writing board 200 relative to the mounting frame 100.

In one embodiment, the endless belt 330 is detachably connected to the top edge 220 of the board body, so that the top edge 220 of the board body of the movable writing board 200 is detachably and fixedly connected to the endless belt 330, thereby facilitating the related personnel to perform the disassembling and repairing of the push-pull mechanism 300 and facilitating the installation in case of the failure of the push-pull mechanism 300.

In one embodiment, as shown in fig. 3, the portion of the endless belt 330 between the first and second flipping

elements

410 and 420 is a flipping strip 331, the flipping strip 331 is connected to the top edge 220 of the blackboard body, the flipping strip 331 has a top driving surface 331a and a bottom driving surface opposite to each other, the included angle between the bottom driving surface and the top edge 220 of the blackboard body is less than 90 °, in this embodiment, the top driving surface 331a is located above the bottom driving surface, which ensures that the flipping strip 331 is not completely perpendicular to the top edge 220 of the blackboard body, i.e., is not completely vertical, the height of the flipping strip 331 is reduced, i.e., the occupied vertical space is smaller, and thus the width of the lateral frame of the push-pull blackboard 10 is reduced. In this embodiment, the flip strip 331 is positioned above the top edge 220 of the board body, and the other portion of the endless belt 330 is positioned on both sides of the movable tablet 200.

In one embodiment, as shown in FIG. 3, the distance between the top driving surface 331a and the top edge 220 of the board body is greater than or equal to the distance between the top driving surface 331a and the bottom driving surface; the first flipping element 410 is disposed adjacent to the driving wheel 310, the second flipping element 420 is disposed adjacent to the driven wheel 320, the portion of the endless belt 330 between the driving wheel 310 and the first flipping element 410 is a first vertical strip 332, the first vertical strip 332 is perpendicular to the top edge 220 of the board, the first vertical strip 332 has a first top side and a first bottom side opposite to each other, and the distance between the top driving surface 331a and the top edge 220 of the board is smaller than or equal to the distance between the first top side and the first bottom side. I.e., the distance between the top drive surface 331a and the top edge 220 of the plate body is greater than or equal to the thickness of the endless drive belt 330 and less than the width of the endless drive belt 330. Thus, the vertical space occupied by the turnover band 331 is small, and the width of the lateral frame of the push-pull blackboard 10 is reduced. When the distance between the top driving surface 331a and the top edge 220 of the blackboard body is equal to the thickness of the annular driving belt 330, the bottom driving surface of the turnover belt body 331 is coplanar with the top edge 220 of the blackboard body, and the height of the turnover belt body 331 in the vertical space is the minimum, i.e. the horizontal frame of the push-pull blackboard 10 can be set to be the narrowest. In this embodiment, the first top side is located above the first bottom side. In this embodiment, the first bottom side surface abuts against the first flip 410, and the first top side surface and the top driving surface 331a are located on the same plane. In this embodiment, the first top side surface and the first bottom side surface are respectively parallel to the top edge 220 of the board body.

In one embodiment, as shown in fig. 4, the portion of the endless belt 330 between the driven wheel 320 and the second turnover member 420 is a second vertical strip 333, and the second vertical strip 333 is perpendicular to the top edge 220 of the plate body.

In one embodiment, the endless belt 330 is folded 90 around the first flipping element 410, and the endless belt 330 is folded 90 around the second flipping element 420, with the bottom driving surface parallel to the top edge 220 of the panel. The turning strip 331, which is thus located between the first and

second turners

410, 420, is parallel to the top edge 220 of the panel body, so that the height of the turning strip 331 in the vertical direction is minimal, i.e. the thickness of the turning strip 331, and not the width of the endless belt 330 before turning.

In order to ensure that the endless belt 330 can maintain stable transmission to stably drive the movable writing board 200 to move after being turned over, in one embodiment, the first turning member 410 and the second turning member 420 are parallel to each other and perpendicular to the writing board surface 210. First upset piece 410 and second upset piece 420 are perpendicular with endless belt 330's transmission direction respectively like this for first upset piece 410 and second upset piece 420 play better upset effect to endless belt 330, so endless belt 330 can not take place the skew after the upset, have guaranteed that the upset area body 331 stably drives movable clipboard 200 and slide.

In one embodiment, the first and

second flippers

410 and 420, respectively, abut the bottom drive surface. The first and

second flippers

410, 420 abut against the bottom driving surface, as opposed to the top driving surface 331a, so that the height of the first and

second flippers

410, 420 relative to the bottom of the mounting frame 100 is close to the height of the top driving surface 331a relative to the bottom of the mounting frame 100, i.e., close to the height of the top side surface, so that the height of the non-folded portion of the endless belt 330 is low, so that the vertical space occupied by the entire endless belt 330 is not large, and the height relative to the first and

second flippers

410, 420 is only the thickness of the endless belt 330, in this embodiment, the first and

second flippers

410, 420 are respectively at the same height as the plate 220. In one embodiment, the top surfaces of the driving wheel 310 and the driven wheel 320 are the same height as the first top surface, so that the height of the whole push-pull mechanism 300 relative to the top edge 220 of the blackboard body is low, and the width of the lateral frame of the push-pull blackboard 10 can be ensured to be narrow. In one embodiment, the driving wheel 310 is located at one side of the movable writing board 200, and the driven wheel 320 is located at the other side of the movable writing board 200.

In other embodiments, the first and

second tumblers

410 and 420 abut the top driving surface 331a, respectively.

To facilitate the connection of the endless belt 330 to the movable writing board 200, in one embodiment, as shown in fig. 5 and 6, the push-pull blackboard 10 further includes a connecting member 500, and the top edge 220 of the board body is connected to the endless belt 330 via the connecting member 500. The movable writing board 200 is conveniently connected with the annular transmission belt 330 through the connecting member 500, the annular transmission belt 330 does not need to be arranged right above the top edge 220 of the board body, the annular transmission belt 330 can be arranged back, namely, away from the writing board surface 210 through the horizontally extending connecting member 500, and thus the whole push-pull mechanism 300 is conveniently arranged.

In order to facilitate the arrangement of the connecting member 500 such that the annular transmission belt 330 smoothly drives the movable writing board 200 to move, in one embodiment, as shown in fig. 6, the connecting member 500 includes a dial plate 510, a first clamping plate 520 and a second clamping plate 530, the dial plate 510 is connected to the top edge 220 of the board body, the annular transmission belt 330 is sandwiched between the first clamping plate 520 and the second clamping plate 530, the first clamping plate 520 and the second clamping plate 530 are respectively connected to the annular transmission belt 330, an end of the dial plate 510 away from the top edge 220 of the board body is sandwiched between the first clamping plate 520 and the annular transmission belt 330, in this embodiment, the connecting member 500 is located between the first overturning member 410 and the second overturning member 420, the first clamping plate 520 and the second clamping plate 530 are connected to the annular transmission belt 330, and are sandwiched between the first clamping plate 520 and the annular transmission belt 330, the pulling plate 510 is connected to the movable writing board 200, so the endless belt 330 can drive the movable writing board 200 to move, and the endless belt 330 is clamped between the first clamping plate 520 and the second clamping plate 530, so the endless belt 330 can drive more smoothly, and the movable writing board 200 can be driven more smoothly. In one embodiment, the first and second clamping pieces, such that the endless belt 330 may be more securely clamped between the first and second clamping pieces.

In order to enable the dial 510 to stably drive the movable writing board 200 to move, in one embodiment, as shown in fig. 6, a limiting groove 521 is formed on a surface of the first clamping plate 520 facing the annular transmission belt 330, and an end of the dial 510 away from the top edge 220 of the plate body is disposed through the limiting groove 521, so that the dial 510 is limited by an inner wall of the limiting groove 521 of the first clamping plate 520, when the annular transmission belt 330 moves, the first clamping plate 520 drives the dial 510 to move, and compared with the case that the dial 510 is driven by a friction force applied to the dial 510 by the annular transmission belt 330 and the first clamping plate 520, an abutting force applied to the dial 510 along a transmission direction of the annular transmission belt 330 is increased, so that the dial 510 can stably drive the movable writing board 200 to move; in addition, the toggle piece 510 is located in the limiting groove 521, so that the first clamping plate 520 and the annular transmission belt 330 can be attached without a gap, and the effect of clamping the annular transmission belt 330 by the first clamping plate 520 and the second clamping plate 530 is prevented from being influenced by the toggle piece 510.

In order to improve the appearance of the display screen 700, in one embodiment, as shown in fig. 1, 7 and 8, the push-pull blackboard 10 further includes a fixed writing board 600, a display screen 700, a movable frame 800 and a driving mechanism 900, the fixed writing board 600 is disposed in the installation frame 100, and the movable writing board 200 slides relative to the fixed writing board 600; the fixed writing board 600 has a fixed writing surface parallel to the writing board surface 210, and the movable writing board 200 and the display screen 700 are located on a side of the fixed writing board 600 facing away from the fixed writing surface; display screen 700 set up in the movable frame 800, actuating mechanism 900 set up in the installing frame 100, just actuating mechanism 900 drives movable frame 800 is along the perpendicular to the direction of writing board face 210 in slide in the installing frame 100, make display screen 700's display surface activity with fixed writing surface coplane. By arranging the movable frame 800 and the driving mechanism 900, when the display screen 700 is needed to be used, the movable writing board 200 is controlled by the driving mechanism 900 to slide forward relative to the mounting frame 100 after the display screen 700 is opened at the front side of the display screen 700, so as to drive the display screen 700 in the movable frame 800 to slide forward, so that the screen surface of the display screen 700 and the fixed writing surface of the fixed writing board 600 are positioned on the same plane, the appearance of the display screen 700 is improved, and the spectators at the corners can also see the content of the display screen 700 without being blocked by the fixed writing board 600.

To promote the smoothness of writing, in one embodiment, the end of the movable writing board 200 facing away from the top edge 220 of the board body is slidably connected to the mounting frame 100 in a direction perpendicular to the writing board surface 210, such that the writing board surface 210 is movable to be coplanar with the fixed writing surface, and the top edge 220 of the board body is slidably connected to the connecting member 500. When the display screen 700 is not needed to be used and the movable writing board 200 needs to be changed, the driving mechanism 900 is used for controlling the movable frame 800 to slide backwards relative to the installation frame 100, so as to drive the display screen 700 in the movable frame 800 to slide backwards, and then the movable writing board 200 is pushed and pulled out along the transmission direction of the annular transmission belt 330, at the moment, the driving mechanism 900 can be used for controlling the movable frame 800 to slide forwards, so that the display screen 700 supports against the rear board surface of the movable writing board 200, which is far away from the writing board surface 210, and the writing stability of the movable writing board 200 is improved.

In one embodiment, as shown in fig. 7 and 8, the driving mechanism 900 includes at least two linear actuators 910, the mounting frame 100 has two opposite mounting inner sidewalls, the movable frame 800 has two opposite movable outer sidewalls, at least one linear actuator 910 is disposed between one mounting inner sidewall and one movable outer sidewall, at least one linear actuator 910 is disposed between the other mounting inner sidewall and the other movable outer sidewall, one end of the linear actuator 910 is connected to the mounting inner sidewall, and the other end is connected to the movable outer sidewall, in this embodiment, the number of linear actuators 910 on both sides of the movable frame 800 is equal, the movable frame 800 can keep balance between left and right sides and slide smoothly by disposing the linear actuators 910 on both sides of the movable frame 800, and the linear actuators 910 are disposed between the sidewalls of the movable frame 800 and the mounting frame 100, the reverse movement of the movable frame 800 along the vertical writing board surface 210 is not affected, and the back-and-forth movement of the movable frame 800 is not affected. In one embodiment, the driving mechanism 900 includes two linear drivers 910, one linear driver 910 is disposed between one of the installation inner sidewalls and one of the movable outer sidewalls, another linear driver 910 is disposed between the other installation inner sidewall and the other movable outer sidewall, one end of the linear driver 910 is connected to the installation inner sidewall, and the other end is connected to the movable outer sidewall. In one embodiment, one end of the linear actuator 910 is connected to the mounting inner sidewall, and the other end is connected to the middle of the movable outer sidewall, so that the movable frame 800 can be driven to slide more stably and balancedly.

In one embodiment, the linear driving member 910 includes a push rod motor and a telescopic push rod connected to the push rod motor, and the push rod motor drives the telescopic push rod to extend and retract, so that the assembly of the linear driving member 910 is simpler and the control and maintenance are facilitated. In other embodiments, the linear driving assembly adopts an assembly structure of a cylinder and a telescopic rod, and the like.

In order to ensure that the linear driving member 910 drives the movable frame 800 to start sliding, in one embodiment, as shown in fig. 8, an included angle formed by the extending direction of the linear driving member 910 and the display surface is greater than 0 °, which ensures that the linear driving member 910 provides a push-pull component force to the movable frame 800 during extension and retraction, and simultaneously, compared with the linear driving member 910 arranged perpendicular to the fixed movable plate, the installation space is saved, and the aesthetic degree of the overall appearance of the push-pull electronic blackboard is improved.

In one embodiment, the push-pull blackboard 10 further includes a corner mechanism, the corner mechanism includes an angular plate, a stop plate and a first fastener, the angular plate includes a first bending plate and a second bending plate connected to each other, the first bending plate is connected to the movable frame 800, the stop plate is slidably disposed on the second bending plate, the first bending plate is provided with a first waist-shaped hole, the second bending plate is provided with a second waist-shaped hole, and the first fastener sequentially penetrates through the second waist-shaped hole and the first waist-shaped hole, so that the stop plate is fastened to the second bending plate; one end of the linear driving member 910 is provided with a second fastening member, the second fastening member is located in the first kidney-shaped hole, and the second fastening member is clamped between the end of the stop plate and the inner wall of the first kidney-shaped hole. This is advantageous for reducing the difficulty in mounting the linear driving member 910 on the movable frame 800, and for facilitating the assembly and disassembly of the linear driving member on the movable frame 800, thereby facilitating the maintenance. In one embodiment, one end of the stopping plate is provided with a hook, the hook extends into the first kidney-shaped hole, and the hook abuts against the second fastener, so that the matching of the corner mechanism and the linear driving member 910 is facilitated.

In one embodiment, as shown in fig. 9, the movable frame 800 is movably abutted against a surface of the movable writing board 200 that is away from the writing board surface 210, a first magnetic attraction member 810 is disposed on the movable frame 800, a second magnetic attraction member is disposed on a surface of the movable writing board 200 that is away from the writing board surface 210, and the first magnetic attraction member 810 and the second magnetic attraction member attract each other; the protruding spacing portion that is equipped with of inner wall of installing frame 100, deviating from of activity clipboard 200 the one side of clipboard face 210 with spacing portion activity butt. Thus, by arranging the first magnetic attraction piece 810 and the second magnetic attraction piece, when the movable frame 800 slides forward relative to the mounting frame 100 to be pressed against the rear plate surface of the movable writing plate 200, the second magnetic element is magnetically attracted to the first magnetic element 810, the movable frame 800 slides backward relative to the mounting frame 100 and simultaneously drives the movable writing board 200 to slide backward relative to the mounting frame 100, further, when the movable writing board 200 slides backward to abut against the stopper portion without separately pulling the movable writing board 200 backward, the movable frame 800 continues to slide backwards, the second magnetic attraction element can be separated from the first magnetic attraction element 810, and then the movable writing board 200 can be operated to slide left and right relative to the mounting frame 100 according to whether the display screen 700 is used, since the movable frame 800 can continue to slide backward, the magnetic attraction effect of the first magnetic attraction element 810 and the second magnetic attraction element becomes smaller and smaller, so that the movable writing board 200 can slide left and right. In one embodiment, the first magnetic element 810 is a magnet, the first magnetic element 810 is connected to the movable frame 800 by snapping, adhering, or other fastening methods, and the second magnetic element is a magnetic metal plate that can be connected to the movable writing board 200 by snapping, adhering, or integrally manufacturing, or other fastening methods. In one embodiment, two opposite inner walls of the mounting frame 100 are respectively provided with one of the limiting portions for abutting against two ends of the movable writing board 200.

In one embodiment, as shown in fig. 9, two opposite inner walls of the mounting frame 100 are respectively provided with a sliding guiding protrusion 110, the sliding guiding protrusion 110 is located at a side of the limiting portion away from the fixed writing board 600, the sliding guiding protrusion 110 extends in a direction perpendicular to the writing board surface 210, two sides of the movable frame 800 are respectively provided with a sliding rail 820, each sliding rail 820 is correspondingly buckled with one sliding guiding protrusion 110 to guide the front and back movement of the movable frame 800, thereby ensuring the sliding smoothness of the movable frame 800 and avoiding the occurrence of a dislocation phenomenon in the sliding process of the movable frame 800 relative to the mounting frame 100.

In order to facilitate the sliding of the movable writing board 200, in one embodiment, as shown in fig. 9, the movable writing board 200 has a bottom edge of the board body opposite to the top edge 220 of the board body, the bottom edge of the board body is slidably connected to the mounting frame 100, the top edge 220 of the board body is provided with a first lifting engaging member, the edge of the movable frame 800 is provided with a second lifting engaging member, and when the movable frame 800 abuts against the movable writing board 200, the first lifting engaging member and the second lifting engaging member are engaged with each other, so that a gap is formed between the bottom edge of the board body and the mounting frame 100. When the first lifting clamping piece and the second lifting clamping piece are mutually buckled, a gap is formed between the movable writing board 200 and the mounting frame 100, so that the sliding friction between the mounting frame 100 and the movable writing board 200 is reduced, and the operating smoothness for switching the position of the movable writing board 200 is improved.

In one embodiment, as shown in fig. 9, the first lifting/lowering engaging member includes a locking strip 221 disposed at the bottom of the movable writing board 200, the second lifting/lowering engaging member includes an extending plate 830 disposed at the bottom of the movable frame 800 and extending forward, a locking slot is disposed on an upper surface of the extending plate 830, and a front end of the locking slot extends to a front end surface of the extending plate 830; when the movable frame 800 and the first movable writing board 200 are attached to each other, the clamping strip 221 is inserted into the clamping groove to be clamped with the extension board 830. When the movable writing board 200 slides backwards to abut against the limiting part, the movable frame 800 continues to slide backwards, so that the clamping strip 221 is separated from the extension board 830, and the movable writing board 200 descends to the original height; after that, according to whether the display screen 700 is used or not, whether the movable writing board 200 slides left and right with respect to the mounting frame 100 or not is operated. In one embodiment, an end of the clip strip 221 facing the extension plate 830 is provided with an upward bent curved portion for guiding the clip strip 221 to extend into the clip slot of the extension plate 830.

In one embodiment, the first lifting/lowering engaging member includes a toggle member mounted on the top of the movable writing board 200 and extending rearward; the second lifting clamping piece comprises a protruding portion arranged at the top of the movable frame 800, the poking piece comprises a first straight line section, an arc-shaped section and a second straight line section, the first straight line section, the arc-shaped section and the second straight line section are sequentially connected from front to back, and the second straight line section is higher than the first straight line section. When the movable frame 800 and the movable writing board 200 are engaged with each other, the protrusion is located below the first straight line segment of the toggle member to lift the movable writing board 200 upward. When the movable writing board 200 slides backwards to the abutting limit part, the movable frame 800 continues to slide backwards, so that the protruding part sequentially slides backwards to the arc-shaped section and the second straight line section of the toggle part, and the movable writing board 200 descends to the original height; after that, according to whether the display screen 700 is used or not, whether the movable writing board 200 slides left and right with respect to the mounting frame 100 or not is operated. In one embodiment, the toggle member is disposed in a manner including, but not limited to, wrapping a wrapping strip around the edge of the movable writing board 200; one end of the first straight line segment of the toggle piece, which is far away from the movable frame 800, is fixed on a wrapping strip wrapping the top of the movable writing board 200 through a positioning column; the positioning post can be, but is not limited to, a pin or a screw.

In one embodiment, the bottom of the mounting frame 100 is sequentially provided with a fixed writing board 600 groove, a movable writing board 200 groove and an equipment mounting groove; the fixed writing board 600 is disposed in the fixed writing board 600 groove, the movable writing board 200 is slidably disposed in the movable writing board 200 groove, and the push-pull mechanism 300 is disposed in the device mounting groove. Thus, the fixed writing board 600 is convenient to arrange, the movable writing board 200 is convenient to slide, and the push-pull mechanism 300 is convenient to arrange.

Further, in one embodiment, the mounting frame 100 is provided with a covering edge, a side wall of the covering edge forms a side wall of the groove for fixing the writing board 600, and the covering edge covers the side portion of the fixing writing board 600, so that the overall beauty of the blackboard 10 is improved. In one of the embodiments, be equipped with between the bottom in activity clipboard 200 groove and the loose-leaf body base and accept the bearing, it is plane bearing or universal antifriction bearing to accept the bearing, so, is favorable to improving the gliding fluency of activity clipboard 200 for installing frame 100, and the noise that produces when having reduced pulling activity clipboard 200 has promoted teaching experience.

In one embodiment, one of the movable frame 800 and the mounting frame 100 is provided with a guide rail extending in a direction perpendicular to the display surface, and the other is provided with a slider engaged with the guide rail, so that the movable frame 800 can stably slide in the mounting frame 100. In one embodiment, the movable frame 800 is provided with a guide rail extending in a direction perpendicular to the display surface, and the mounting frame 100 is provided with a slider engaged with the guide rail. Further, in one embodiment, the guide rail is recessed toward the inside of the movable frame 800, so that the stability of the movable frame 800 sliding relative to the mounting frame 100 can be increased by the guide rail and the slider.

In one embodiment, the number of the movable writing boards 200 is two, the annular transmission belt 330 includes two transmission belt bodies, the axis of the driving wheel 310 and the axis of the driven wheel 320 form a coaxial surface, the two transmission belt bodies are respectively located at two sides of the coaxial surface, the top edge 220 of the board body of one movable writing board 200 is connected with one transmission belt body, and the top edge 220 of the board body of the other movable writing board 200 is connected with the other transmission belt body; the two movable writing boards 200 are movably abutted. Therefore, the two movable writing boards 200 can be pulled left and right, and the writing area is increased.

In one embodiment, the number of the fixed writing boards 600 is two, a splicing space is formed between the two fixed writing boards 600, the movable writing board 200 is used for being movably arranged in the splicing space, and the display screen 700 is used for being movably arranged in the splicing space.

In one embodiment, the opposite side surfaces of the two fixed writing boards are respectively provided with an inclined guide surface, the two fixed writing boards comprise a left fixed writing board and a right fixed writing board, the rear side edge of the inclined guide surface of the left fixed writing board is connected with the rear board surface of the left fixed writing board, and the rear side edge of the inclined guide surface of the right fixed writing board is connected with the rear board surface of the right fixed writing board; and the slope guide face of the fixed clipboard in left side with the contained angle between the preceding face of the fixed clipboard in left side and the slope guide face of the fixed clipboard in right side with the contained angle between the preceding face of the fixed clipboard in right side is the acute angle. Wherein, the fixed clipboard in left side with the relative side of the fixed clipboard in right side forms whole inclined plane, perhaps the fixed clipboard in left side with the relative side of the fixed clipboard in right side forms the concatenation face including slope guide face and even face, preferably, slope guide face can the display screen inserts forward the fixed clipboard in left side with play the guide effect when the fixed clipboard in right side between for enlarge the seam, avoid appearing the phenomenon that the display screen blocks.

In all embodiments of the present application, the terms "large" and "small" are relatively speaking, and the terms "upper" and "lower" are relatively speaking, so that descriptions of these relative terms are not repeated herein.

It should be appreciated that reference throughout this specification to "in this embodiment," "in an embodiment of the present application," or "as an alternative implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in this embodiment," "in the examples of the present application," or "as an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are all alternative embodiments and that the acts and modules involved are not necessarily required for this application.

In various embodiments of the present application, it should be understood that the size of the serial number of each process described above does not mean that the execution sequence is necessarily sequential, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A push-pull blackboard, comprising:

installing a frame;

2. A push-pull blackboard according to claim 1, wherein the part of the ring-shaped transmission belt between the first flip member and the second flip member is a flip belt body connected to the top edge of the board body, the flip belt body has a top transmission surface and a bottom transmission surface opposite to each other, and the included angle between the bottom transmission surface and the top edge of the board body is less than 90 °.

3. A push-pull blackboard according to claim 2, wherein the annular belt is turned 90 ° around the first flip member, the annular belt is turned 90 ° around the second flip member, and the bottom driving surface is parallel to the top edge of the board body.

4. A push-pull blackboard according to claim 2, wherein the first and second flip members are parallel to each other and perpendicular to the writing board surface, respectively.

5. A push-pull blackboard according to claim 2, characterised in that the distance between the top driving surface and the top edge of the board body is greater than or equal to the distance between the top driving surface and the bottom driving surface; the first overturning part is arranged close to the driving wheel, the second overturning part is arranged close to the driven wheel, the part, located between the driving wheel and the first overturning part, of the annular transmission belt is a first vertical belt body, the first vertical belt body is perpendicular to the top edge of the plate body, the first vertical belt body is provided with a first top side surface and a first bottom side surface which are opposite to each other, and the distance between the top transmission surface and the top edge of the plate body is smaller than or equal to the distance between the first top side surface and the first bottom side surface.

6. A push-pull blackboard according to claim 3, characterised in that the first and second flippers are each in abutment with the bottom driving surface.

7. A push-pull blackboard according to claim 1, further comprising a connecting member, wherein the top edge of the blackboard body is connected to the endless belt through the connecting member.

8. A push-pull blackboard according to claim 7, wherein the connecting member includes a dial piece, a first clamping plate and a second clamping plate, the dial piece is connected to the top edge of the board body, the annular transmission belt is clamped between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are respectively connected to the annular transmission belt, and one end of the dial piece, which is far away from the top edge of the board body, is clamped between the first clamping plate and the annular transmission belt.

9. A push-pull blackboard according to claim 8, wherein one side of the first clamping plate facing the annular transmission belt is provided with a limiting groove, and one end of the poking piece far away from the top edge of the blackboard body passes through the limiting groove.

10. A push-pull blackboard according to claim 7, further comprising a fixed writing board, a display screen, a movable frame and a driving mechanism, wherein the fixed writing board is disposed in the mounting frame, and the movable writing board slides relative to the fixed writing board; the fixed writing board is provided with a fixed writing surface parallel to the surface of the writing board, and the movable writing board and the display screen are positioned on one side of the fixed writing board, which is far away from the fixed writing surface;

11. A push-pull blackboard according to claim 10, wherein the end of the movable writing board facing away from the top edge of the board body is slidably connected to the mounting frame in a direction perpendicular to the writing board surface, so that the writing board surface is movable coplanar with the fixed writing surface, and the top edge of the board body is slidably connected to the connecting member.

12. A push-pull blackboard according to claim 10, wherein the driving mechanism includes at least two linear actuators, the mounting frame has two opposite mounting inner side walls, the movable frame has two opposite movable outer side walls, at least one linear actuator is disposed between one of the mounting inner side walls and one of the movable outer side walls, at least one linear actuator is disposed between the other of the mounting inner side walls and the other of the movable outer side walls, one end of the linear actuator is connected to the mounting inner side wall, and the other end of the linear actuator is connected to the movable outer side wall.

13. A push-pull blackboard according to claim 12, characterised in that the linear actuator extends at an angle greater than 0 ° to the display surface.

14. A push-pull blackboard according to claim 12, further comprising a corner mechanism, the corner mechanism including a corner plate, a stop plate and a first fastener, the corner plate including a first bending plate and a second bending plate connected to each other, the first bending plate being connected to the movable frame, the stop plate being slidably disposed on the second bending plate, the first bending plate being formed with a first waist-shaped hole, the second bending plate being formed with a second waist-shaped hole, the first fastener being sequentially inserted through the second waist-shaped hole and the first waist-shaped hole to fasten the stop plate to the second bending plate; one end of the linear driving piece is provided with a second fastener, the second fastener is located in the first waist-shaped hole, and the second fastener is clamped between the end of the stop plate and the inner wall of the first waist-shaped hole.

15. A push-pull blackboard according to claim 10, wherein the movable frame is movably abutted against one side of the movable writing board, which is away from the writing board surface, the movable frame is provided with a first magnetic attraction member, one side of the movable writing board, which is away from the writing board surface, is provided with a second magnetic attraction member, and the first magnetic attraction member and the second magnetic attraction member are attracted to each other; the protruding spacing portion that is equipped with of inner wall of installing frame, deviating from of activity clipboard the one side of clipboard face with spacing portion activity butt.

16. A push-pull blackboard according to claim 15, wherein the movable writing board has a bottom edge opposite to the top edge of the board, the bottom edge of the board is slidably connected to the mounting frame, the top edge of the board is provided with a first lifting engaging member, the edge of the movable frame is provided with a second lifting engaging member, and when the movable frame abuts against the movable writing board, the first lifting engaging member and the second lifting engaging member are engaged with each other, so that a gap is formed between the bottom edge of the board and the mounting frame.

17. A push-pull blackboard according to any one of claims 1 to 16, wherein the number of the movable writing boards is two, the annular transmission belt includes two transmission belts, the axis of the driving wheel and the axis of the driven wheel form a coaxial surface, the two transmission belts are respectively located on two sides of the coaxial surface, the top edge of one board body of one movable writing board is connected with one transmission belt, and the top edge of the other board body of the other movable writing board is connected with the other transmission belt; the two movable writing boards are movably abutted.