CN114903280B - A multifunctional desk with holographic projection and teaching method - Google Patents

Abstract

The invention relates to the technical field of education, and provides a multifunctional teacher desk with holographic projection and a teaching method, wherein the multifunctional teacher desk comprises a fixed seat, the fixed seat comprises a cubic shell, and the top of the fixed seat is provided with an opening; the lifting seat is arranged in the fixed seat and finishes lifting action from the opening; the top of the lifting seat is provided with a display screen, one end of the display screen is hinged to one side of the lifting seat, and the lifting seat finishes lifting action under the swinging of the display screen; according to the invention, the lifting seat and the fixed seat are matched, the original teacher desk is disassembled into the lifting structure, and then more space is provided, so that holographic projection equipment or other equipment can be placed in, and the utilization rate of the space is improved.

Description

A multifunctional desk with holographic projection and teaching method

technical field

The invention relates to the field of education technology, in particular to a multifunctional desk with holographic projection and a teaching method.

Background technique

Lecture desks are often seen in our daily life. They are generally used for teachers to teach. The previous desks were mainly used to place lecturer's lesson preparation materials; with the development of multimedia, the existing desks also serve as multimedia It is generally used as a multimedia display screen for lecturers; with the development of society, the omnidirectionality of teaching is becoming more and more important. Some holographic projection devices exist independently, such as the Chinese patent with the publication number: CN206711423U, which discloses a three-dimensional teaching demonstration cabinet, which is specially used to display 3D images alone. Primary school classrooms), it becomes more crowded, and it is easy to cause collisions and injuries of people.

Contents of the invention

The purpose of the present invention is to provide a multifunctional lecture table with holographic projection and a teaching method, which uses the combination of the lifting seat and the fixed seat to split the original lecture table into a structure that can be lifted and then provide more space. In this way, holographic projection equipment or other equipment can be placed in it to improve space utilization.

Embodiments of the present invention are achieved through the following technical solutions: a multifunctional desk with holographic projection, including a fixed seat, the fixed seat includes a cube-shaped shell and an opening is provided on the top; the lifting seat, the lifting seat is arranged on the fixed seat The lifting action is completed from the inside of the opening; the top of the lifting base is provided with a display screen, and one end of the display screen is hinged to one side of the lifting base, and the lifting base completes the lifting action under the swing of the display screen; the terminal equipment is used to The user's trigger command sends image information to the display screen to control the display content of the display screen; the gesture recognition component is arranged in the lifting seat and is connected to the display screen by wire or wirelessly for receiving The gesture information of the user is recognized, and the gesture is recognized to control the display content of the display screen.

Further, the lifting base is a frame structure and a prism-shaped light-transmitting component is arranged inside, and the height of the light-transmitting component is equal to the lifting height difference of the lifting base; Under the action of , a 3D image is constructed in the light-transmitting component.

Further, the frame of the lifting base is also equipped with a turning mechanism, under the action of the turning mechanism, the display screen performs a 180° turning movement, and the turned display screen serves as a projection source above the light-transmitting component.

Further, the frame of the lifting seat is provided with a notch with an opening vertically upward; the two side walls of the notch are provided with a first chute and a second chute; The cavity and the second cavity, the first cavity and the second cavity; the turning mechanism includes: a first rotating shaft, the first end of the first rotating shaft is connected to the first slider through a bearing, and the second end of the first rotating shaft is passed through a bearing Connect the second slider, the first slider slides vertically in the first chute, the second slider slides vertically in the second chute; the second shaft, one end of the second shaft is hinged In the middle of the first rotating shaft, the second rotating shaft and the first rotating shaft are vertically arranged; the first blind hole and the second blind hole arranged axially along the first rotating shaft are also arranged in the first rotating shaft, and the opening of the first blind hole faces The first cavity is set, the opening of the second blind hole is set towards the second cavity; the first fixing block is set in the first cavity, the first fixing block is set with a first slope, and the second cavity is set with a second A fixed block, the second fixed block is provided with a second slope; the first wedge-shaped block is provided on the first slope, the first wedge-shaped block slides along the first slope, and the second wedge-shaped block is provided on the second slope. ;The first wedge-shaped block is provided with a first annular chute, the second wedge-shaped block is provided with a second annular chute, the first blind hole is provided with a first connecting rod, and the second blind hole is provided with a second connecting rod , the bottom of the first chute is provided with a first arc-shaped through hole, the bottom of the second chute is provided with a second arc-shaped through-hole, and the first end of the first connecting rod passes through the first arc-shaped through-hole and is arranged on the In the first annular chute; the first end of the second connecting rod passes through the second arc-shaped through hole and is fitted in the second annular chute; the second end of the first connecting rod is provided with a first spur rack, The second end of the second connecting rod is provided with a second spur rack, and the second rotating shaft is provided with a circular gear, the circular gear meshes with the first spur rack, and the circular gear meshes with the second spur rack; the second rotating shaft connects display screen.

Further, a ratchet is also provided on the outside of the first rotating shaft, and the ratchet is coaxial with the first rotating shaft; a driving gear plate is also provided inside the fixed seat, and a third straight-toothed rack is vertically provided on the bottom of the lifting seat, and the driving gear plate Engaging with the third spur rack, the shaft of the driving gear plate is provided with an abutment structure. The abutment mechanism includes: a pull rod and an abutment block. One end of the abutment block is provided with a groove, and one end of the pull rod passes through the bearing and the groove. The other end of the pull rod is arranged on the outside of the fixed seat; the side of the driving gear plate is provided with a matching groove, and one end of the abutting block is arranged in the matching groove, and there is also a set between the abutting block and the side wall of the fixing seat. There is a spring, and the spring is sleeved on the pull rod. Under the elastic force of the spring, the contact surface of the abutting block and the mating groove is locked by concavo-convex cooperation; the ratchet and the abutting block are connected through a belt drive.

Further, the ratchet wheel includes a wheel sleeve, a ratchet, a first pawl and a second pawl, the first pawl is arranged on the second rotating shaft, the first pawl is fixedly arranged, and both the first pawl and the second pawl The ratchet is abutted on the ratchet, the ratchet is arranged on the wheel sleeve, the wheel sleeve is coaxially arranged and rotationally connected with the first rotating shaft, and the wheel sleeve and the abutment block are connected through a belt transmission.

A teaching method, comprising the steps of:

S1: In the preparation stage, set the display surface of the display screen upwards for use by teachers;

S2: Lift one end of the display screen, set it vertically through the first rotating shaft, and face the students for students to observe;

S3: Swing the display screen repeatedly with the first rotating shaft as the axis, raise the lifting seat, and leak out the light-transmitting component;

S4: Rotate the display screen with the second rotating shaft as the axis to set the display surface horizontally downward, as the projection source of the light-transmitting component; construct a 3D image; use the terminal device to send image information to the display screen, and use the terminal device or gesture recognition component to control The rotation, opening and closing of image information is convenient for students to observe;

S5: After use, pull out the pull rod, reversely rotate the display screen with the second rotating shaft, then rotate the display screen with the first rotating shaft to set the display surface obliquely upwards, return to the original position, and then manually press the lifting seat to lower it to the fixed seat internal.

The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

1: Using the combination of lifting seat and fixed seat, the original lecture table is split into a structure that can be lifted and then provided with more space, so that holographic projection equipment or other equipment can be placed in it to improve space utilization.

2: Use the display screen to control the lifting of the lifting seat, avoiding the installation of large-scale equipment such as motors in the already tight space, further optimizing the space, and the lifting method is simple and reliable.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the structure schematic diagram of the multifunctional desk with holographic projection provided by the present invention;

Fig. 2 is a schematic diagram of the first state of cooperation between the display screen and the light projection assembly in the multifunctional desk with holographic projection provided by the present invention;

Fig. 3 is a schematic diagram of the second state of cooperation between the display screen and the light projection assembly in the multi-function desk with holographic projection provided by the present invention;

Fig. 4 is a schematic diagram of the third state of cooperation between the display screen and the light projection assembly in the multi-function desk with holographic projection provided by the present invention;

Fig. 5 is a schematic diagram of the fourth state of cooperation between the display screen and the light projection assembly in the multi-function desk with holographic projection provided by the present invention;

Fig. 6 is a structural schematic diagram of the flipping assembly in the multifunctional desk with holographic projection provided by the present invention;

Fig. 7 is A-A sectional view among Fig. 4;

Fig. 8 is a side cross-sectional schematic diagram of a multifunctional desk with holographic projection provided by the present invention;

Fig. 9 is a schematic structural view of the ratchet wheel in the multi-functional desk with holographic projection provided by the present invention;

Fig. 10 is a schematic diagram of the structure of the cooperation between the tie rod and the abutment block in the multifunctional desk with holographic projection provided by the present invention;

Icons: 1-fixing seat, 2-lifting seat, 3-display screen, 4-translucent component, 5-turning mechanism, 51-first rotating shaft, 52-second rotating shaft, 53-first chute, 54-the first One slider, 55-bearing, 56-the first connecting rod, 57-the second connecting rod, 58-the first fixed block, 59-the first wedge block, 60-the first cavity, 61-the first arc-shaped pass Hole, 7-drive gear plate, 71-the third spur rack, 72-the first spur rack, 81-wheel sleeve, 82-ratchet, 83-the first pawl, 84-the second pawl, 91-pull rod, 92-spring, 93-abutting block, 94-belt, 95-matching groove, 101-notch, 102-first blind hole, 103-second blind hole, 104-first bevel, 105- The second inclined plane, 106-first annular chute, 107-second annular chute, 108-the second spur rack, 109-circular gear.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" ” and other indications are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it also needs to be explained that, unless otherwise clearly stipulated and limited, if the terms "setting", "installation", "connection" and "connection" appear, they should be understood in a broad sense, for example, it can be a fixed The connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example

As shown in Figure 1, a multi-functional desk with holographic projection includes a fixed base 1 and a lift base 2, wherein the fixed base 1 is fixed on the podium, where it is necessary to set up electric wires and communication lines from the inside of the fixed base 1 and the podium. To complete the power supply and communication of the entire device, of course, in this application, it can also be connected by wireless communication, such as wifi or bluetooth, all of which can be done by using existing technical means.

As shown in Figure 1, the fixed seat 1 includes a cube-shaped shell and an opening is provided on the top; it is generally rectangular, that is, a cuboid; the lifting seat 2 is arranged inside the fixed seat 1 and completes the lifting action from the opening; The top of the seat 2 is provided with a display screen 3, and one end of the display screen 3 is hinged on one side of the lifting seat 2, and the lifting seat 2 completes the lifting action under the swing of the display screen 3; It avoids the installation of large-volume equipment such as motors in the already tight space, further optimizes the space, and the lifting method is simple and reliable.

Further, it also includes a terminal device and a gesture recognition component, the terminal device is used to send image information to the display screen according to the user's trigger instruction, and control the display content of the display screen; the gesture recognition component is arranged in the lifting seat, and is wired or wireless connection, used to accept gesture information from the user, and recognize the gesture to control the display content of the display screen; of course, in this embodiment, the gesture recognition technical solution for controlling the display screen is an existing technology, generally including: image acquisition - Gesture detection and segmentation - Gesture analysis - Static gesture recognition - Dynamic gesture recognition several key technologies, all can use the existing technology.

It should be noted that in this application, the setting method of the holographic projection is not limited. For example, the lifting base 2 is a frame structure and a prism-shaped light-transmitting component 4 is arranged inside, and the height of the light-transmitting component 4 is equal to that of the lifting base 2. The lifting height difference; the top of the light-transmitting component 4 is provided with a projection source, and under the action of the projection source and the light-transmitting component 4, a 3D image is constructed in the light-transmitting component 4; when the lifting seat 2 rises, the light-transmitting component 4 It is fully displayed, and then the components of the 3D image can be realized through the projection source and the light-transmitting component 4. Here, a certain description is given to the projection source and the light-transmitting component 4. Specifically, the light-transmitting component 4 is four prism-shaped Light-transmitting boards, a plurality of light-transmitting boards will put light through the projection source into a 3D image, such as a classroom model based on holographic projection technology and its application disclosed in the Chinese patent with the publication number: CN 106019778A, and the four-sided The coordination relationship between the platform and the liquid crystal display screen 3 is the same; in this embodiment, a similar technical solution is also used to realize the construction of the 3D image, which belongs to the prior art, and will not be described here.

Further, in this embodiment, if the lifting action is completed by swinging the display screen 3, the swinging display screen 3 can be used to repeatedly trigger the travel switch, and then the travel switch triggers the electronic telescopic rod to drive the lifting seat 2 to lift or lower, which is realized by coding. For example, after the lifting base 2 rises to the highest height, it begins to descend; of course, in this embodiment, in order to reduce the use of electrical appliances, save space, and avoid equipment failure caused by too many electrical appliances, the following settings are adopted: the frame of the lifting base 2 There is also an overturn mechanism 5 inside, under the action of the overturn mechanism 5, the display screen 3 performs a 180° overturn movement, and the overturned display screen 3 is used as the projection source above the light-transmitting component 4; of course, in other embodiments , the way of double display screen 3 can also be used to provide the projection source for the light-transmitting component 4. In this embodiment, a display screen 3 is used as an example to illustrate the structure and function; It is necessary to use gesture recognition components and terminal equipment to perform image control on it.

As shown in Figure 4, the frame of the lifting seat 2 is provided with a notch 101 with an opening vertically upward; the two side walls of the notch 101 are distributed with a first chute 53 and a second chute; located in the frame and at the notch 101 A first cavity 60 and a second cavity are distributed on both sides of the .

As shown in Figure 4, the turning mechanism 5 includes: a first rotating shaft 51, the first end of the first rotating shaft 51 is connected to the first slider 54 through a bearing 55, and the second end of the first rotating shaft 51 is connected to the second slider through a bearing 55 , the first slider 54 slides in the vertical direction in the first chute 53, and the second slider slides in the vertical direction in the second chute; the second rotating shaft 52, one end of the second rotating shaft 52 is hinged on The middle part of the first rotating shaft 51, and the second rotating shaft 52 and the first rotating shaft 51 are vertically arranged; It should be noted here that the first rotating shaft 51 can rotate around its own rotating shaft under the action of the bearing 55, and can also be at the same time Under the action of the first slide block 54 and the second slide block, the vertical sliding up and down is completed.

As shown in FIG. 4 , there are also a first blind hole 102 and a second blind hole 103 arranged axially along the first rotating shaft 51 in the first rotating shaft 51 , and the opening of the first blind hole 102 is arranged toward the first cavity 60 . The opening of the second blind hole 103 is set towards the second cavity; the first fixed block 58 is provided in the first cavity 60, the first fixed block 58 is provided with a first slope 104, and the second fixed block is provided in the second cavity. block, the second fixed block is provided with a second slope 105; the first wedge block 59 is provided on the first slope 104, and the first wedge block 59 slides along the first slope 104; The sliding second wedge is fast; the first wedge block 59 is provided with a first annular chute 106, the second wedge block is provided with a second annular chute 107, and the first blind hole 102 is provided with a first connecting rod 56, The second blind hole 103 is provided with a second connecting rod 57, the bottom of the first chute 53 is provided with a first arc-shaped through hole 61, the bottom of the second chute is provided with a second arc-shaped through hole, and the first connecting rod The first end of 56 passes through the first arc-shaped through hole 61 and fits in the first annular chute 106; the first end of the second connecting rod 57 passes through the second arc-shaped through hole and fits in the second annular chute 107; the second end of the first connecting rod 56 is provided with the first spur rack 72, the second end of the second connecting rod 57 is provided with the second spur rack 108, and the second rotating shaft 52 is provided with a circular gear 109 , the circular gear 109 meshes with the first spur rack 72 , and the circular gear 109 meshes with the second spur rack 108 ; the second rotating shaft 52 is connected to the display screen 3 .

In this embodiment, the first fastening block 58 and the second fastening block have various arrangement modes, generally as shown in Fig. 105 is arranged toward the second rotating shaft 52, and is arranged symmetrically; when ensuring that the first wedge block 59 and the second wedge block slide, the first rotating shaft 51 can rise or fall; the amplitude of the rise and fall here is determined according to the inclination angle of the slope, It is generally 45°, and the whole process is: rotate the second rotating shaft 52 once, and the second rotating shaft 52 drives the first connecting rod 56 and the second connecting rod 57 to perform linear motion, thereby causing the first wedge-shaped block 59 and the second wedge-shaped block to move in a straight line. Slide on the first inclined plane 104 or the second inclined plane 105. It should be noted here that the first wedge block 59 and the second wedge block will only slide along the surfaces of the first inclined plane 104 and the second inclined plane 105. The groove is realized. In addition, the first wedge block 59 and the second wedge block will only have two actions, one is moving toward each other, and the other is moving away from each other. When moving toward each other, due to the existence of the first inclined surface 104 and the second inclined surface 105 relationship, so the first connecting rod 56 and the second connecting rod 57 will drive the first rotating shaft 51 to realize the result of descending in the vertical direction; The wedge-shaped block will move away from it, and then it will rise along the first slope 104 and the second slope 105, thereby driving the first rotating shaft 51 to move vertically upward. It should also be noted that, in this embodiment, the reason why the first rotating shaft 51 is set to realize a vertical decline or rise under the action of the second rotating shaft 52 is to adopt a display screen 3 (the display screen 3 has its own gravity. sensor), when the display screen 3 is used by the teacher, the screen of the display screen 3 needs to face the blackboard, which is the direction of the teacher, so the end of the display screen 3 away from the teacher needs to be raised, as shown in Figure 2-5 In this way, the screen direction of the display 3 can be turned to face the teacher through the gravity sensor, and at the same time, the teacher can see the display 3 from a better angle; to avoid reflection due to the angle , so that the teacher cannot directly watch the display screen 3, which affects teaching. The reason for lowering the end of the display screen 3 away from the teacher is that when the display screen 3 is used as the projection source of the light-transmitting component 4, it is necessary to ensure that the projection direction of the projection source is absolutely level with the light-transmitting component 4, such as As shown in Figure 2-5, that is to say, there is a fixed positional relationship, then the display screen 3 with an inclined angle cannot be used as the projection source of the light-transmitting component 4, thus, it is necessary to ensure the fixed position of the two , preferably in parallel; so in this embodiment, the method of rotating the second rotating shaft 52 is used to control the rise and fall of the driving first rotating shaft 51, so as to achieve the above two purposes; specifically, the rotation method of the second rotating shaft 52 Only 180° clockwise or 180° counterclockwise.

Further, as shown in Figures 8-10, a ratchet is provided on the outside of the first rotating shaft 51, and the ratchet is coaxial with the first rotating shaft 51; A third spur rack 71 is directly provided, and the driving gear plate 7 meshes with the third spur rack 71. The rotating shaft of the driving gear plate 7 is provided with an abutment structure, and the abutment mechanism includes: a pull rod 91 and an abutment block 93 , one end of the abutment block 93 is provided with a groove, one end of the pull rod 91 is rotationally connected with the groove through the bearing 55, and the other end of the pull rod 91 is arranged on the outside of the fixed seat 1; the side of the driving gear plate 7 is provided with a matching groove 95 , one end of the abutment block 93 is set in the matching groove 95, and a spring 92 is also provided between the abutment block 93 and the side wall of the fixed seat 1, and the spring 92 is sleeved on the pull rod 91. Under the elastic force of the spring 92, The contact surface of the abutting block 93 and the mating groove 95 is locked by concave-convex cooperation; the ratchet and the abutting block 93 are connected by a belt 94; further, as shown in FIG. 7 , the ratchet includes a wheel cover 81, a ratchet 82, a first The pawl 83 and the second pawl 84 , the first pawl 83 is arranged on the second rotating shaft 52 , the first pawl 83 is fixedly arranged, and both the first pawl 83 and the second pawl 84 abut against the ratchet 82 Above, the ratchet 82 is arranged on the wheel cover 81, the wheel cover 81 is coaxially arranged and rotationally connected with the first rotating shaft 51, and the wheel cover 81 is connected with the abutment block 93 through a belt 94; that is to say, the first rotating shaft 51 is used as the When the shaft reciprocates the second rotating shaft 52 (display screen 3), under the action of the first pawl 83 and the second pawl 84, it will cause the ratchet (wheel sleeve 81) to do one-way rotational movement, specifically, the first A torsion spring is provided at the joint between the ratchet 83 and the second ratchet 84. When the second rotating shaft 52 swings downward around the first rotating shaft 51, the first ratchet 83 abuts against the ratchet 82 under the action of the torsion spring. Drive the ratchet 82 to rotate; at this time, the first ratchet 83 and the second ratchet 84 are arranged in the same direction of rotation, so the second ratchet 84 will not block the rotation of the ratchet; it should be noted that, as shown in the figure, the second ratchet The ratchet 84 is above the first ratchet 83, so when the second rotating shaft 52 drives the first ratchet 83 to swing upwards, the second ratchet 84 will block the rotation of the ratchet, thereby avoiding the rotation of the wheel sleeve 81, and then the second The second rotating shaft 52 swings downward, driving the ratchet to rotate, thereby driving the wheel cover 81 to rotate; the one-way rotation of the wheel cover 81 drives the driving gear plate 7 to rotate, and the driving gear plate 7 drives the third straight toothed rack 71 to move, thereby rising, Driving the lifting base 2 to rise realizes the controlled movement of the lifting base 2; it should be noted that during the process of descending, only the pull rod 91 needs to be manually pulled out so that the abutment fastening and the driving gear plate 7 are not in contact, so that the transmission becomes invalid. , the lifting seat 2 can be lowered under the condition of self-weight, or the mode of manual pressing can be lowered and reset.

In this embodiment, it also includes a method, a teaching method, the purpose of which is to more comprehensively display the teaching results. For example, in the mechanical profession, in order to display the 3D diagrams of some components such as gears, it can better help students understand view, so it is necessary to cooperate with the display of 3D holographic projections. For this purpose, this embodiment provides a teaching method; details are as follows:

S1: In the preparation stage, set the display surface of the display screen 3 (with its own gravity sensor) obliquely upwards for daily use by teachers;

S2: Lift one end of the display screen 3, set it vertically through the first rotating shaft 51, and face the students for students to observe the screen. At the same time, due to the gravity sensor, the direction of the screen rotates, which is convenient for students to observe the graphics on the display screen 3. In this way, students and teachers can be guaranteed to see the same screen;

S3: Repeatedly swing the display screen 3 around the first rotating shaft 51 to raise the lifting base 2 to leak out the light-transmitting component 4;

S4: Rotate the display screen 3 by 180 degrees with the second rotating shaft 52 as the axis, and then rotate the display screen 3 with the first rotating shaft 51 as the rotating shaft until the display surface is set horizontally downward. At this time, the display screen 3 is placed horizontally without tilt Angle, can be completely used as the projection source of the light-transmitting component 4; construct 3D images; use terminal equipment to send image information to the display screen, use terminal equipment or gesture recognition components to control the rotation, opening, and closing of image information; it is convenient for students to observe, convenient Students directly observe the three-dimensional structure, which is beneficial to teaching;

S5: After use, pull out the pull rod 91, reversely rotate the display screen 3 with the second rotating shaft 52, then rotate the display screen 3 with the first rotating shaft 51 so that the display surface is set obliquely upward, restore the original position, and then manually press the lifting seat 2 Let it drop down to the inside of the holder 1.

During the whole process, the teacher can use the same display screen 3 in three ways, which enriches the dimension of teaching, improves the quality of teaching, broadens the horizon of students, and increases the imagination of students.

Finally, it should be emphasized that both the data line and the power line of the display screen 3 are connected using the prior art, and the connection lines are all flexible connections, which fully meet the structural requirements of this embodiment.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. A multifunctional desk with holographic projection, characterized in that: comprising A fixed seat (1), the fixed seat (1) is a cube-shaped shell with an opening at the top; Lifting seat (2), the lifting seat (2) is arranged inside the fixed seat (1) and completes the lifting action from the opening; the top of the lifting seat (2) is provided with a display screen (3), so One end of the display screen (3) is hinged to one side of the lifting seat (2), and the lifting seat (2) completes the lifting action under the swing of the display screen (3); The terminal device is used to send image information to the display screen according to the user's trigger instruction, and control the display content of the display screen; Gesture recognition component, the gesture recognition component is arranged in the lifting seat, and is wired or wirelessly connected with the display, used to receive the user's gesture information, and recognize the gesture, to control the display content of the display screen; The lifting seat (2) is a frame structure and is provided with a prism-shaped light-transmitting component (4) inside, and the height of the light-transmitting component (4) is equal to the lifting height difference of the lifting seat (2); A projection source is provided above the light-transmitting component (4), and under the action of the projection source and the light-transmitting component (4), a 3D image is constructed in the light-transmitting component (4); A turning mechanism (5) is also provided in the frame, and the display screen (3) performs a 180° turning movement under the action of the turning mechanism (5), and the turned display screen (3) acts as the light-transmitting A projection source above the component (4); The frame of the lifting seat (2) is provided with a notch (101) with an opening vertically upward; the two side walls of the notch (101) are distributed with a first chute (53) and a second chute; A first cavity (60) and a second cavity are arranged in the frame and on both sides of the notch (101); Described turnover mechanism (5) comprises: The first rotating shaft (51), the first end of the first rotating shaft (51) is connected to the first slider (54) through the bearing (55), and the second end of the first rotating shaft (51) is passed through the bearing (55) Connect the second slider, the first slider (54) slides vertically in the first chute (53), and the second slider does vertical sliding in the second chute. direction of sliding; A second rotating shaft (52), one end of the second rotating shaft (52) is hinged in the middle of the first rotating shaft (51), and the second rotating shaft (52) and the first rotating shaft (51) are vertically arranged; A first blind hole (102) and a second blind hole (103) arranged axially along the first rotating shaft (51) are also provided in the first rotating shaft (51), and the opening of the first blind hole (102) Set towards the first cavity (60), the opening of the second blind hole (103) is set towards the second cavity; a first fixing block (58) is arranged in the first cavity (60) ), the first fixed block (58) is provided with a first slope (104), the second cavity is provided with a second fixed block, and the second fixed block is provided with a second slope (105); the A first wedge-shaped block (59) is provided on the first slope (104), and the first wedge-shaped block (59) slides along the first slope (104). The second wedge-shaped fast sliding of the second inclined plane (105); the first wedge-shaped block (59) is provided with a first annular chute (106), and the second wedge-shaped block is provided with a second annular chute (107) ), the first connecting rod (56) is arranged in the first blind hole (102), the second connecting rod (57) is arranged in the second blind hole (103), and the first chute (53 ) is provided with a first arc-shaped through hole (61), the bottom of the second chute is provided with a second arc-shaped through hole, and the first end of the first connecting rod (56) passes through the first An arc-shaped through hole (61) is fitted in the first annular chute (106); the first end of the second connecting rod (57) is fitted in the second arc-shaped through hole through the second arc-shaped through hole. In the second annular chute (107); The second end of the first connecting rod (56) is provided with a first spur rack (72), and the second end of the second connecting rod (57) is provided with a second spur rack (108), The second rotating shaft (52) is provided with a circular gear (109), the circular gear (109) meshes with the first spur rack (72), and the circular gear (109) meshes with the second straight toothed rack (72). A rack and pinion (108); the second rotating shaft (52) is connected to the display screen (3). 2. The multifunctional lectern with holographic projection as claimed in claim 1, characterized in that: a ratchet is also provided on the outside of the first rotating shaft (51), and the ratchet is the same as the first rotating shaft (51). axis; The inside of the fixed base (1) is also provided with a driving gear plate (7), and the bottom of the lifting base (2) is vertically provided with a third spur rack (71), and the driving gear plate (7) Engaging with the third spur rack (71), the rotating shaft of the driving gear plate (7) is provided with an abutment structure, and the abutment mechanism includes: A pull rod (91) and an abutting block (93), one end of the abutting block (93) is provided with a groove, and one end of the pull rod (91) is rotatably connected with the groove through a bearing (55), the The other end of the pull rod (91) is set on the outside of the fixed seat (1); the side of the drive gear plate (7) is provided with a matching groove (95), and one end of the abutment block (93) is set on the In the matching groove (95), a spring (92) is also provided between the abutment block (93) and the side wall of the fixed seat (1), and the spring (92) is sleeved on the pull rod ( 91), under the elastic force of the spring (92), the contact surface of the abutment block (93) and the matching groove (95) are locked by concavo-convex cooperation; The ratchet and the abutting block (93) are connected in transmission through a belt (94). 3. The multifunctional lectern with holographic projection according to claim 2, characterized in that: the ratchet comprises a wheel cover (81), a ratchet (82), a first pawl (83) and a second pawl (84), the first ratchet (83) is arranged on the second rotating shaft (52), the first ratchet (83) is fixedly arranged, and the first ratchet (83) and the second ratchet (84) are all abutted on the ratchet (82), the ratchet (82) is arranged on the wheel sleeve (81), and the wheel sleeve (81) is coaxial with the first rotating shaft (51) It is arranged and connected in rotation, and the wheel sleeve (81) is connected with the abutment block (93) through a belt (94). 4. A teaching method, applicable to the multifunctional desk with holographic projection as shown in claim 3, characterized in that, comprising the following steps: S1: In the preparation stage, the display surface of the display screen (3) is set obliquely upwards for use by teachers; S2: Lift one end of the display screen (3), set it vertically through the first rotating shaft (51), and face the students for students to observe; S3: Repeatedly swing the display screen (3) around the first rotating shaft (51) to raise the lifting seat (2) and leak out the light-transmitting component (4); S4: Rotate the display screen (3) with the second rotating shaft (52) as the axis to set the display surface horizontally downward, as a projection source for the light-transmitting component (4); construct a 3D image; send image information to the display screen using a terminal device , using terminal equipment or gesture recognition components to control the rotation, opening, and closing of image information, which is convenient for students to observe; S5: After use, pull out the pull rod (91), reversely rotate the display screen (3) with the second rotating shaft (52), and then rotate the display screen (3) with the first rotating shaft (51) so that the display surface is set obliquely upward, Return to the original position, and then manually press the lifting seat (2) to make it drop to the inside of the fixed seat (1).

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