Obtuse angle sliding blackboard

Abstract

The utility model provides an obtuse-angle sliding blackboard, which includes a main frame, two sliding plates, a linear drive assembly, two angle-changing plates and a first drive assembly. An installation space is formed inside the main frame; the two angle-changing plates are symmetrically arranged on the left and right sides of the installation space, and the angle-changing plates are inclined from the outside to the inside and backward, and the outside of the angle-changing plates is hinged to the main frame; the first drive assembly is arranged on the rear side of the angle-changing plate, and is used to drive the inner end of the angle-changing plate to rotate with its outer end as the rotation axis. The first driving assembly includes a driving plate, a guide frame, a motor assembly and a driving column. The driving plate is connected to the rear side of the variable angle plate, and a guide groove is provided on the driving plate; a driving block and a screw are provided on the upper side of the guide frame, and the driving block is slidably arranged on the guide frame; the screw is arranged at an angle to the guide groove, and the screw passes through the driving block and is threadedly engaged with the driving block; the power output end of the motor assembly is connected to the screw to drive the screw to rotate; the driving column is connected to the driving block and passes through the guide groove, and the driving column is suitable for moving in the guide groove along the extension direction of the screw to drive the variable angle plate to rotate.

Description

Technical Field

[0001] The utility model belongs to the technical field of educational tools, and in particular relates to an obtuse-angle push-pull blackboard. Background Art

[0002] Some obtuse-angled sliding blackboards have two sliding plates in the middle and variable angle plates set at an obtuse angle on both sides. When the sliding plates need to be moved outward, the variable angle plates on both sides are manually flipped outward first, so that after the variable angle plates change track, the inner end of the variable angle plates avoids the moving space of the sliding plates, and finally the two sliding plates are manually moved outward respectively, so that they are hidden behind the two variable angle plates. In this process, personnel need to frequently walk left and right in front of the blackboard, which is not only very cumbersome to operate, but also has the risk of pinching hands.

[0003] In order to solve the above problems, the applicant applied for an intelligent obtuse-angle push-pull plate, including a main frame, an installation space formed inside the main frame, two push-pull plates symmetrically arranged on the left and right sides of the middle of the installation space, and a linear drive assembly installed on the top of the main frame. The linear drive assembly is used to drive the push-pull plate to move laterally along the length direction of the installation space. Two variable angle plates are symmetrically arranged on the left and right sides of the installation space. The variable angle plates are inclined from the outside to the inside and backward, and the outer side of the variable angle plate is hinged to the main frame. A pushing assembly is arranged on the rear side of the main frame. The pushing assembly is used to drive the inner end of the variable angle plate to rotate with its outer end as the rotation axis.

[0004] The push assembly includes a mounting frame, a push motor and an electromagnet. The mounting frame is welded or bolted to the upper end surface of the lower frame. The push motor is horizontally fixed to the upper part of the mounting frame. The driving end of the push motor faces the angle-changing plate. The electromagnet is fixed to the rear end surface of the inner end of the angle-changing plate. The driving end of the push motor and the electromagnet are magnetically attracted to each other. When the driving end of the push motor is extended or shortened along its axial direction, the inner end of the angle-changing plate can be rotated forward or backward. A mounting block is fixedly provided on the top of the rear side surface of the angle-changing plate. The mounting block is provided with a mounting hole. The self-locking column is longitudinally installed in the mounting hole and protrudes toward the upper end. Self-locking disks are respectively provided on both sides of the lower end surface of the upper frame. A cross-through groove is provided on the lower end surface of the self-locking disk. The rear opening of the cross-through groove is arranged opposite to the upper end of the self-locking column. When the angle-changing plate rotates, the moving trajectory of the self-locking column is an arc trajectory. Since any one of the cross grooves is a straight groove, as the self-locking column rotates in the cross groove, one side of the upper end of the self-locking column will abut against the inner wall of one of the grooves. At this time, the angle-changing plate will no longer be able to continue rotating, thereby locking the opening and closing angle of the angle-changing plate.

[0005] Therefore, the above-mentioned intelligent obtuse-angle sliding plate requires a pushing component to push the variable angle plate, and also requires additional self-locking columns and self-locking plates to lock the opening and closing angles of the variable angle plate to complete the rotation of the variable angle plate. Utility Model Content

[0006] The utility model provides an obtuse-angle sliding blackboard, aiming to solve the technical problem that the existing intelligent obtuse-angle sliding blackboard needs to additionally set self-locking columns and self-locking disks to lock the opening and closing angles of the angle-changing plates in order to complete the rotation of the angle-changing plates on the basis of setting a pushing component to push the angle-changing plates to rotate.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is: to provide an obtuse-angle push-pull blackboard, including:

[0008] The main frame forms an installation space inside;

[0009] Two push-pull plates are symmetrically arranged in the middle of the installation space;

[0010] A linear drive assembly is installed on the top of the main frame, and the linear drive assembly is used to drive the push-pull plate to move laterally along the length direction of the installation space;

[0011] Two variable angle plates are symmetrically arranged on the left and right sides of the installation space, the variable angle plates are arranged to be tilted from the outside to the inside and backward, and the outside of the variable angle plates is hinged to the main frame;

[0012] A first driving assembly is disposed at the rear side of the angle-changing plate and is used to drive the inner end of the angle-changing plate to rotate with its outer end as a rotation axis;

[0013] Wherein, the first driving component comprises:

[0014] A driving plate connected to the rear side of the angle-changing plate, wherein a guide groove is provided on the driving plate;

[0015] The guide frame has a driving block and a screw on its upper side, the driving block is slidably arranged on the guide frame; the screw is arranged at an angle with the guide groove, and the screw passes through the driving block and is threadedly matched with the driving block;

[0016] A motor assembly, whose power output end is connected to the screw rod, for driving the screw rod to rotate; and

[0017] A driving column is connected to the driving block and passes through the guide groove. The driving column is suitable for moving in the guide groove along the extending direction of the screw rod to drive the angle-changing plate to rotate.

[0018] In a possible implementation of the obtuse-angle sliding blackboard provided by the utility model, the main frame includes an upper frame and a lower frame horizontally arranged from top to bottom, vertical frames are respectively arranged on both sides of the upper frame and the lower frame, the sliding plate is horizontally slidably arranged between the upper frame and the lower frame, the linear drive assembly is installed on the rear side of the upper frame, the outer end of the variable angle plate is hinged on the vertical frame on the corresponding side, and the guide frame is arranged on the rear side of the variable angle plate and connected to the lower frame.

[0019] In a possible implementation of the obtuse-angle sliding blackboard provided by the utility model, a accommodating space is provided inside the lower frame, and a avoidance opening connected to the accommodating space is opened on the top of the lower frame; the guide frame, the motor assembly, the drive block and the screw are all arranged in the accommodating space.

[0020] In a possible implementation of the obtuse-angle push-pull blackboard provided by the utility model, the lower end surface of the upper frame and the upper end surface of the lower frame are respectively provided with slide rails along the length direction, and the upper and lower ends of the push-pull plate are both provided with sliders, and the sliders are slidably matched with the corresponding slide rails.

[0021] In a possible implementation of the obtuse-angle push-pull blackboard provided by the utility model, the slider includes a connecting section and a bending section, the connecting section is vertically connected to the upper end or the lower end of the push-pull plate, the bending section is arranged at the end of the connecting section and is bent toward one side of the push-pull plate; the slide rail includes a connecting plate and a bending plate, the connecting plate is vertically connected to the lower end surface of the upper frame or the upper end surface of the lower frame, the end of the bending plate is bent toward the side away from the push-pull plate, the connecting plate and the bending plate constitute a slide groove with an opening direction away from the push-pull plate, and the bending section is slidably arranged in the corresponding slide groove.

[0022] In a possible implementation of the obtuse-angle push-pull blackboard provided by the utility model, protrusions extending along the length direction are provided on the inner walls on both sides of the slide groove.

[0023] In a possible implementation of the obtuse-angle sliding blackboard provided by the utility model, a first connecting frame is provided on the rear end face of the outer side of the variable angle plate, a rotating body is provided at the end of the first connecting frame, a rotating groove is provided on the front side of the inner wall of the vertical frame, and the rotating body is rotatably provided in the rotating groove to adjust the inclination angle of the variable angle plate.

[0024] In a possible implementation of the obtuse-angle sliding blackboard provided by the utility model, the linear drive assembly includes a linear track, a connecting piece and an opening and closing motor. The linear track is horizontally installed on the lower end surface of the upper frame and is located on the rear side of the sliding plate. The two connecting pieces are respectively connected to the inner ends of the rear end surfaces of the two sliding plates in a one-to-one correspondence. The connecting piece is slidably matched with the linear track. The opening and closing motor drives the two connecting pieces to slide along the linear track to drive the two sliding plates to open and close.

[0025] In a possible implementation method of the obtuse-angle push-pull blackboard provided by the utility model, a mounting groove is provided on the upper end surface of the linear track along its length direction, and anti-slip flanges are relatively arranged on the top of both sides of the mounting groove, and a plurality of mounting plates are arranged at intervals along its length direction on the upper end surface of the linear track, and two L-shaped folded plates are relatively arranged at the lower end of the mounting plate, and the two L-shaped folded plates are located in the mounting groove, and the free ends of the two L-shaped folded plates are far away from each other and are correspondingly clamped under the two anti-slip flanges, an extension plate is horizontally arranged on one side of the mounting plate, and a downwardly bent limit plate is provided at the end of the extension plate, and the limit plate is overlapped on the rear side surface of the linear track, a gasket is arranged above the mounting plate, and a connecting screw is penetrated from bottom to top in the middle of the mounting plate, and the connecting screw penetrates the gasket and is connected to the lower end surface of the upper frame.

[0026] In a possible implementation method of the obtuse-angle sliding blackboard provided by the utility model, it also includes an all-in-one machine and a cable management assembly. The all-in-one machine is arranged on the rear side of the sliding plate and is connected to the main frame. After the sliding plate is pushed to both sides, the all-in-one machine is exposed; the cable management assembly includes a guide rod arranged on the main frame and a spiral cable wound on the guide rod. The extension direction of the guide rod is parallel to the sliding direction of the sliding plate. One end of the spiral cable is connected to the sliding plate, and the other end is connected to the all-in-one machine.

[0027] The beneficial effects of the obtuse-angle push-pull blackboard provided by the utility model are as follows: compared with the prior art, the obtuse-angle push-pull blackboard provided by the utility model has a drive plate installed on the back of the variable angle plate, and a guide groove is opened on the drive plate, the screw and the guide groove are set at an angle, and the screw is driven to rotate by the motor assembly, driving the drive block and the drive column to move along the extension direction of the screw, and adjusting the position of the drive column in the guide groove can adjust the angle between the extension direction of the guide groove and the length direction of the installation space, that is, the inclination angle of the variable angle plate; at the same time, the drive block and the drive column are driven by the screw, and it is difficult to drive the screw to rotate by the drive block, and it is also difficult to change the position of the drive column in the guide groove by applying force to the variable angle plate. Therefore, the self-locking of the variable angle plate can be automatically achieved, and the angle of the variable angle plate can be locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the three-dimensional structure of the obtuse-angle push-pull blackboard provided in the first embodiment of the utility model;

[0029] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0030] Figure 3 This is a schematic diagram of the main structure of the obtuse-angle push-pull blackboard provided in the first embodiment of the utility model;

[0031] Figure 4 A schematic diagram of the rear view structure of the obtuse-angle push-pull blackboard provided in the first embodiment of the utility model;

[0032] Figure 5 For along Figure 3 The partial cross-sectional structure diagram along the AA line;

[0033] Figure 6 For along Figure 4 The cross-sectional structure diagram of the middle BB line;

[0034] Figure 7 for Figure 6 The enlarged view of the C part in FIG.

[0035] Figure 8 for Figure 6 The enlarged view of the D part in FIG.

[0036] Fig. 9 for Figure 4 A magnified view of part B in FIG.

[0037] Fig.10 A rear view structural schematic diagram of an obtuse-angle push-pull blackboard provided in the second embodiment of the utility model;

[0038] Fig.11 for Fig.10 The enlarged view of part E in FIG.

[0039] Description of reference numerals:

[0040] 1. Upper frame; 2. Lower frame; 3. Vertical frame; 31. Rotation slot;

[0041] 4. Push-pull plate; 5. Variable angle plate; 51. First connecting frame;

[0042] 52. Rotating body; 6. Linear drive assembly; 61. Linear track; 611. Mounting slot;

[0043] 612, anti-drop flange; 62, second connecting frame; 63, sliding block; 64, opening and closing motor;

[0044] 65, mounting plate; 651, L-shaped folding plate; 652, extension plate; 653, limiting plate;

[0045] 66, gasket; 67, connecting screws; 71, driving plate; 72, guide frame;

[0046] 73. driving block; 74. driving column; 75. screw rod; 76. motor assembly;

[0047] 81. connecting plate; 82. bending plate; 91. connecting section; 92. bending section;

[0048] 10. All-in-one machine; 11. Guide rod; 12. Spiral cable. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0053] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0056] Please also read Figures 1 to 9 , the obtuse-angle push-pull blackboard provided by the utility model is now described. The obtuse-angle push-pull blackboard includes a main frame, two push-pull plates 4, a linear drive assembly 6, two variable angle plates 5 and a first drive assembly, and an installation space is formed inside the main frame; the two push-pull plates 4 are symmetrically arranged in the middle of the installation space; the linear drive assembly 6 is installed on the top of the main frame, and the linear drive assembly 6 is used to drive the push-pull plates 4 to move laterally along the length direction of the installation space; the two variable angle plates 5 are symmetrically arranged on the left and right sides of the installation space, and the variable angle plates 5 are tilted from the outside to the inside and backward, and the outside of the variable angle plates 5 is hinged to the main frame; the first drive assembly is arranged at the rear side of the variable angle plate 5, and is used to drive the inner end of the variable angle plate 5 to rotate with its outer end as the rotation axis.

[0057] Among them, the first driving assembly includes a driving plate 71, a guide frame 72, a motor assembly 76 and a driving column 74, the driving plate 71 is connected to the rear side of the variable angle plate 5, and a guide groove is provided on the driving plate 71; a driving block 73 and a screw 75 are provided on the upper side of the guide frame 72, and the driving block 73 is slidably arranged on the guide frame 72; the screw 75 is arranged at an angle to the guide groove, and the screw 75 passes through the driving block 73 and is threadedly engaged with the driving block 73; the power output end of the motor assembly 76 is connected to the screw 75 to drive the screw 75 to rotate; the driving column 74 is connected to the driving block 73 and passes through the guide groove, and the driving column 74 is suitable for moving in the guide groove along the extension direction of the screw 75 to drive the variable angle plate 5 to rotate.

[0058] The beneficial effect of the obtuse-angle sliding blackboard provided by the embodiment of the utility model is as follows: compared with the prior art, the obtuse-angle sliding blackboard provided by the embodiment of the utility model has a driving plate 71 installed on the back of the variable angle plate 5, and a guide groove parallel to the variable angle plate 5 is opened on the driving plate 71, and the screw 75 is driven to rotate by the motor assembly 76, driving the driving block 73 and the driving column 74 to move along the length direction, and adjusting the position of the driving column 74 in the guide groove can adjust the angle between the extension direction of the guide groove and the length direction of the installation space, that is, the inclination angle of the variable angle plate 5; at the same time, the driving block 73 and the driving column 74 are driven by the screw 75, and it is difficult to drive the screw 75 to rotate by the driving block 73, and it is also difficult to change the position of the driving column 74 in the guide groove by applying force to the variable angle plate 5, therefore, the self-locking of the variable angle plate 5 can be automatically realized, and the angle of the variable angle plate 5 can be locked.

[0059] like Figure 1 and Figure 3 As shown, in a specific implementation of the obtuse-angle sliding blackboard provided in an embodiment of the utility model, the main frame includes an upper frame 1 and a lower frame 2 horizontally arranged from top to bottom, and vertical frames 3 are respectively arranged on both sides of the upper frame 1 and the lower frame 2. The push-pull plate 4 is horizontally slidably arranged between the upper frame 1 and the lower frame 2, and the linear drive assembly 6 is installed on the rear side of the upper frame 1. The outer end of the variable angle plate 5 is hinged on the vertical frame 3 on the corresponding side, and the guide frame 72 is arranged on the rear side of the variable angle plate 5 and connected to the lower frame 2.

[0060] like Figure 1 and Figure 2As shown, in a specific implementation of the obtuse-angle sliding blackboard provided in an embodiment of the utility model, a accommodating space is provided inside the lower frame 2, and a avoidance opening connected to the accommodating space is opened on the top of the lower frame 2; the guide frame 72, the motor assembly 76, the drive block 73 and the screw 75 are all arranged in the accommodating space to make the appearance more neat and beautiful, and to form a certain protection for the guide frame 72, the motor assembly 76, the drive block 73 and the screw 75.

[0061] Furthermore, the lower frame is provided with a retaining edge around the two circumferences to form a storage slot for placing chalk, erasers, etc.

[0062] like Figure 4 As shown, in a specific implementation of the obtuse-angle push-pull blackboard provided by the embodiment of the utility model, the lower end surface of the upper frame 1 and the upper end surface of the lower frame 2 are respectively provided with slide rails along the length direction, and the upper and lower ends of the push-pull plate 4 are provided with sliders, and the sliders are slidably matched with the corresponding slide rails. Among them, the number of sliders at the upper end of the push-pull plate 4 is multiple, and they are evenly arranged at equal intervals; the number of sliders at the lower end of the push-pull plate 4 is also multiple, and they are evenly arranged at equal intervals. The sliding cooperation of multiple sliders with the slide rails can improve the stability of the lateral sliding of the push-pull plate 4 and reduce shaking.

[0063] like Figure 6 , Figure 7 and Figure 8 As shown, in a specific implementation of the obtuse-angle push-pull blackboard provided by the embodiment of the utility model, the slider includes a connecting section 91 and a bending section 92, the connecting section 91 is vertically connected to the upper end or lower end of the push-pull plate 4, and the bending section 92 is arranged at the end of the connecting section 91 and bends toward one side of the push-pull plate 4. Correspondingly, the slide rail includes a connecting plate 81 and a bending plate 82, and the connecting plate 81 and the bending plate 82 are integrally formed. The track connected to the lower end surface of the upper frame 1, the upper end of its connecting plate 81 is vertically connected to the lower end surface of the upper frame 1, and the bending plate 82 is vertically extended upward after bending, so as to form an upward opening chute between the connecting plate 81 and the bending plate 82, and the chute extends along the length direction of the upper frame 1, and the bending section 92 of the slider at the upper end of the push-pull plate 4 is hooked in the chute, which can realize the sliding of the push-pull plate 4 along the length direction of the chute.

[0064] Similarly, the track connected to the upper end surface of the lower frame 2 has the lower end of the connecting plate 81 vertically connected to the upper end surface of the lower frame 2, and the bending plate 82 is bent and vertically extended upward, so that a downward opening slide is formed between the connecting plate 81 and the bending plate 82, and the slide extends along the length direction of the lower frame 2. The bending section 92 of the slider at the lower end of the push-pull plate 4 is hooked in the slide, and the push-pull plate 4 can be driven to slide along the length direction of the slide. Therefore, the push-pull plate 4 realizes overall stable lateral stable sliding through the cooperation of the upper slider and the slide rail and the cooperation of the lower slider and the slide rail.

[0065] Further, such as Figure 7 and Figure 8 As shown, in a specific implementation of the obtuse-angle push-pull blackboard provided in an embodiment of the utility model, protrusions extending along the length direction are provided on the inner walls on both sides of the slide groove to reduce the contact area between the side of the slider and the side of the slide, thereby reducing the sliding resistance.

[0066] like Figure 3 and Figure 5 As shown, in a specific implementation manner of the obtuse-angle sliding blackboard provided in an embodiment of the utility model, a first connecting frame 51 is provided on the rear end face of the outer side of the variable angle plate 5, a rotating body 52 is provided at the end of the first connecting frame 51, a rotating groove 31 is provided on the front side of the inner wall of the vertical frame 3, and the rotating body 52 is rotatably set in the rotating groove 31 for adjusting the inclination angle of the variable angle plate 5.

[0067] Specifically, the rotating body 52 is a cylindrical structure, and the rotating groove 31 is an adaptive semi-cylindrical cavity structure. The rotating body 52 is adapted to be installed in the rotating groove 31. The variable angle plate 5 can adjust its inclination angle through the rotational cooperation between the rotating body 52 and the rotating groove 31, so that the inner end of the variable angle plate 5 can avoid the push-pull plate 4, ensuring that the push-pull plate 4 can move smoothly laterally.

[0068] like Figure 4 and Figure 7 As shown, in a specific implementation of the obtuse-angle push-pull blackboard provided by an embodiment of the utility model, the linear drive assembly 6 includes a linear rail 61, a connecting piece and an opening and closing motor 64, the linear rail 61 is horizontally installed on the lower end surface of the upper frame 1 and is located on the rear side of the push-pull plate 4, the two connecting pieces are respectively connected to the inner ends of the rear end surfaces of the two push-pull plates 4 in a one-to-one manner, the connecting piece is slidably matched with the linear rail 61, and the opening and closing motor 64 drives the two connecting pieces to slide along the linear rail 61 to drive the two push-pull plates 4 to open and close.

[0069] Specifically, the connecting member includes a second connecting frame 62 and a sliding block 63. The second connecting frame 62 is connected to the inner end of the rear end surface of the corresponding push-pull plate 4 by screws. At the same time, the second connecting frame 62 is also connected to the lower part of the sliding block 63 by screws. The linear slide has a sliding groove opening downward. The upper part of the sliding block 63 is slidably set in the sliding groove, and is clamped with the opposite sides of the sliding groove by the slots on both sides of the sliding block 63 to prevent the sliding block 63 from falling out of the sliding groove.

[0070] like Figure 7 and Fig. 9 As shown, in a specific implementation manner of the obtuse-angle push-pull blackboard provided in an embodiment of the utility model, a mounting groove 611 is opened on the upper end surface of the linear track 61 along its length direction, and anti-slip flanges 612 are relatively arranged on the top of both sides of the mounting groove 61, and a plurality of mounting plates 65 are spaced apart along its length direction on the upper end surface of the linear track 61, and two L-shaped folded plates 651 are relatively arranged at the lower end of the mounting plate 65, and the two L-shaped folded plates 651 are located in the mounting groove 611, and the free ends of the two L-shaped folded plates 651 are far away from each other and correspondingly clamped under the two anti-slip flanges 612, which can effectively prevent the two L-shaped folded plates 651 from escaping from the mounting groove 611.

[0071] An extension plate 652 is horizontally arranged on one side of the mounting plate 65, and a downwardly bent limit plate 653 is arranged at the end of the extension plate 652. The limit plate 653 overlaps the rear side of the linear track 61. A gasket 66 is arranged above the mounting plate 65. A connecting screw 67 is penetrated from bottom to top in the middle of the mounting plate 65. The connecting screw 67 penetrates the gasket 66 and is connected to the lower end face of the upper frame 1. The connecting screw 67 can fix the mounting plate 65 to the lower end face of the upper frame 1, and the gasket 66 is used to keep it stable. At this time, the upper end faces of the free ends of the two L-shaped folded plates 651 correspond to the lower end faces of the anti-slip flange 612, respectively, so that the linear track 61 can be stably installed.

[0072] like Fig.10 and Fig.11 As shown, in a specific implementation of the obtuse-angle sliding blackboard provided in an embodiment of the utility model, it also includes an all-in-one machine 10 and a cable management assembly. The all-in-one machine 10 is arranged on the rear side of the sliding plate 4 and is connected to the main frame. After the sliding plate 4 is pushed to both sides, the all-in-one machine 10 is exposed; the cable management assembly includes a guide rod 11 arranged on the main frame and a spiral cable 12 wound on the guide rod 11. The extension direction of the guide rod 11 is parallel to the sliding direction of the sliding plate. One end of the spiral cable 12 is connected to the sliding plate, and the other end is connected to the all-in-one machine 10.

[0073] It should be noted that the blackboard in this embodiment is an infrared interconnected blackboard with a recording function, that is, the content written by chalk can be saved and displayed on the all-in-one machine. Such a push-pull blackboard needs to be connected to the all-in-one machine by a data cable. Since the push-pull blackboard needs to move left and right, the connected data cable needs to be very long, and the cable is relatively messy and easily pulled through.

[0074] The integrated machine 10 and the push-pull plate 4 are interconnected by a spiral cable 12 wound around the guide rod 11, so that the spiral cable 12 can freely expand and contract with the push-pull plate when the push-pull plate moves, which can effectively prevent the cable from being tangled or broken during the movement of the push-pull plate, thereby ensuring the service life of the cable.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An obtuse-angle push-pull blackboard, characterized in that: include: The main frame forms an installation space inside; Two push-pull plates are symmetrically arranged in the middle of the installation space; A linear drive assembly is installed on the top of the main frame, and the linear drive assembly is used to drive the push-pull plate to move laterally along the length direction of the installation space; Two variable angle plates are symmetrically arranged on the left and right sides of the installation space, the variable angle plates are arranged to be tilted from the outside to the inside and backward, and the outside of the variable angle plates is hinged to the main frame; and A first driving assembly is disposed at the rear side of the angle-changing plate and is used to drive the inner end of the angle-changing plate to rotate with its outer end as a rotation axis; Wherein, the first driving component comprises: A driving plate connected to the rear side of the angle-changing plate, wherein a guide groove is provided on the driving plate; The guide frame has a driving block and a screw on its upper side, the driving block is slidably arranged on the guide frame; the screw is arranged at an angle with the guide groove, and the screw passes through the driving block and is threadedly matched with the driving block; A motor assembly, whose power output end is connected to the screw rod, for driving the screw rod to rotate; and A driving column is connected to the driving block and passes through the guide groove. The driving column is suitable for moving in the guide groove along the extending direction of the screw rod to drive the angle-changing plate to rotate.

2. The obtuse-angle push-pull blackboard according to claim 1, characterized in that: The main frame includes an upper frame and a lower frame horizontally arranged from top to bottom, and vertical frames are respectively arranged on both sides of the upper frame and the lower frame. The push-pull plate is arranged to slide horizontally between the upper frame and the lower frame. The linear drive assembly is installed on the rear side of the upper frame, and one outer end of the variable angle plate is hinged to the vertical frame on the corresponding side. The guide frame is arranged on the rear side of the variable angle plate and connected to the lower frame.

3. The obtuse-angle push-pull blackboard according to claim 2, characterized in that: The lower frame has an accommodation space inside, and the top of the lower frame has an escape opening connected to the accommodation space; the guide frame, the motor assembly, the drive block and the screw are all arranged in the accommodation space.

4. The obtuse-angle push-pull blackboard according to claim 2, characterized in that: The lower end surface of the upper frame and the upper end surface of the lower frame are respectively provided with slide rails along the length direction, and the upper end and the lower end of the push-pull plate are both provided with sliders, and the sliders are slidably matched with the corresponding slide rails.

5. The obtuse-angle push-pull blackboard according to claim 4, characterized in that: The slider includes a connecting section and a bending section, the connecting section is vertically connected to the upper end or the lower end of the push-pull plate, and the bending section is arranged at the end of the connecting section and is bent toward one side of the push-pull plate; the slide rail includes a connecting plate and a bending plate, the connecting plate is vertically connected to the lower end surface of the upper frame or the upper end surface of the lower frame, the end of the bending plate is bent toward a side away from the push-pull plate, the connecting plate and the bending plate constitute a slide groove with an opening direction away from the push-pull plate, and the bending section is slidably arranged in the corresponding slide groove.

6. The obtuse-angle push-pull blackboard according to claim 5, characterized in that: The inner walls on both sides of the slide groove are provided with protrusions extending along the length direction.

7. The obtuse-angle push-pull blackboard according to claim 2, characterized in that: A first connecting frame is provided on the rear end face of the outer side of the variable angle plate, a rotating body is provided at the end of the first connecting frame, a rotating groove is provided on the front side of the inner wall of the vertical frame, and the rotating body is rotatably provided in the rotating groove to adjust the inclination angle of the variable angle plate.

8. The obtuse-angle push-pull blackboard according to claim 2, characterized in that: The linear drive assembly includes a linear track, a connecting piece and an opening and closing motor. The linear track is horizontally installed on the lower end surface of the upper frame and is located on the rear side of the push-pull plate. The two connecting pieces are respectively connected to the inner ends of the rear end surfaces of the two push-pull plates in a one-to-one manner. The connecting piece is slidably matched with the linear track. The opening and closing motor drives the two connecting pieces to slide along the linear track to drive the two push-pull plates to open and close.

9. The obtuse-angle push-pull blackboard according to claim 8, characterized in that: The upper end surface of the linear track is provided with a mounting groove along its length direction, and anti-slip flanges are relatively arranged on the top of both sides of the mounting groove; a plurality of mounting plates are arranged at intervals along its length direction on the upper end surface of the linear track; two L-shaped folded plates are relatively arranged at the lower end of the mounting plate, and the two L-shaped folded plates are located in the mounting groove, and the free ends of the two L-shaped folded plates are far away from each other and are correspondingly clamped under the two anti-slip flanges; an extension plate is horizontally arranged on one side of the mounting plate, and a downwardly bent limiting plate is provided at the end of the extension plate, and the limiting plate is overlapped on the rear side surface of the linear track; a gasket is arranged above the mounting plate, and a connecting screw is penetrated from bottom to top in the middle of the mounting plate, and the connecting screw penetrates the gasket and is connected to the lower end surface of the upper frame.

10. The obtuse-angle push-pull blackboard according to claim 1, characterized in that: It also includes an all-in-one machine and a cable management component, wherein the all-in-one machine is arranged at the rear side of the push-pull plate and is connected to the main frame. When the push-pull plate is pushed to both sides, the all-in-one machine is exposed; the cable management component includes a guide rod arranged on the main frame and a spiral cable wound on the guide rod, the extension direction of the guide rod is parallel to the sliding direction of the push-pull plate, one end of the spiral cable is connected to the push-pull plate, and the other end is connected to the all-in-one machine.

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