Lifting writing device and combined writing device thereof

Abstract

The utility model relates to the technical field of writing boards, in particular to a lifting writing device and a combined writing device thereof. The lifting writing device comprises a fixed frame and at least one writing board, the fixed frame comprises a side frame with a track, and the two sides of the writing board are installed in the track in a sliding mode and can ascend and descend along the track; a writing board is arranged in the side frame, one side of the writing board is connected with a transmission line, the transmission line is used for transmitting signals between the writing board and a control unit of the device, a line pipe is further arranged in the side frame, the transmission line is installed in the line pipe and can stretch out and draw back when the writing board ascends and descends, and an opening for the transmission line to penetrate out is formed in one side of the line pipe. The length of the transmission line can be dynamically adjusted along with lifting of the writing board, the transmission line is surrounded by the line pipe, and winding interference between the transmission line and other parts is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to writing board technical field especially, relates to a kind of lifting writing device and its combination writing device. BACKGROUND

[0002] In the field of education and conference, writing board is a commonly used display and communication tool. With the development of technology, the traditional writing board is gradually replaced by more intelligent and flexible writing board. Various intelligent writing boards are disclosed in the prior art, such as light energy board, a plurality of infrared sensors are arranged in the peripheral area of the light energy board, and the positioning function is realized according to the position of the infrared light signal blocked, and then the writing content is determined. The signal detected by the infrared sensor is further transmitted to the controller through the transmission line, so as to realize the storage of the writing content or the transmission of the writing content to other display screens for display. Moreover, the electrical elements of the writing board need to be powered to work normally.

[0003] On the other hand, in order to facilitate writing, many writing boards are made into lifting type, which is convenient for users to adjust the height of the writing board according to different scene requirements. However, in this case, the transmission line used to connect the writing board and the controller has problems when the writing board needs to be lifted, because the fixed line cannot adapt to the dynamic adjustment of the writing board, and it is easy to cause line damage or entanglement with other components. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the embodiments of the present utility model is to provide a lifting writing device.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present utility model provide the following technical solutions:

[0006] A lifting writing device, comprising a fixed frame and at least one writing board, the fixed frame comprises a side frame with a track, and the two sides of the writing board are slidingly installed in the track and can be lifted along the track; one side of the writing board is connected with a transmission line, the transmission line is used for transmitting signals between the writing board and the control unit of the device, and a wire tube is further arranged in the side frame, the transmission line is installed in the wire tube and can be stretched and contracted when the writing board is lifted, and one side of the wire tube is provided with an opening for the transmission line to pass out.

[0007] Optionally, the writing board comprises a front plate and a back plate arranged in parallel front and back, and the side frame comprises two regions front and back, and the track and the wire tube are arranged in each region, the front plate is slidingly installed in the track of the front side region of the side frame, and the back plate is slidingly installed in the track of the back side region of the side frame.

[0008] Optionally, a connecting bracket is arranged at the top corner of the writing board, and a pulley assembly is arranged on the connecting bracket, which is slidingly arranged in the track.

[0009] Optionally, the track comprises two arc-shaped plates, and the openings of the two arc-shaped plates are oppositely arranged, and the pulley assembly comprises at least three pulleys, two of which are in close contact with one side of the arc-shaped plate, and the remaining pulleys are in close contact with the arc-shaped plate on the opposite side.

[0010] Optionally, a bending portion is arranged at the bottom of the connecting bracket, a limiting piece is arranged on the bending portion, a positioning channel is formed between the limiting piece and the bending portion, and the top of the transmission line is bent to pass through the positioning channel and is connected to the writing board.

[0011] Optionally, a limiting piece is arranged on the side of the writing board, and a positioning channel is arranged in the limiting piece, and the top of the transmission line is bent to pass through the positioning channel and is connected to the writing board.

[0012] Optionally, the lifting writing device further comprises a driving mechanism, which is arranged on the fixed frame and comprises a driving motor, a driving wheel and a transmission belt, the driving wheel is arranged on the output shaft of the driving motor, the transmission belt passes around the driving wheel, and the two ends of the transmission belt are connected to the writing board.

[0013] Optionally, a transmission groove is arranged on the connecting bracket, and the end of the transmission belt is bent and sleeved in the transmission groove.

[0014] Optionally, the driving wheel is a synchronous wheel, and the transmission belt is a synchronous belt; or the driving wheel is a chain wheel, and the transmission belt is a transmission chain.

[0015] Optionally, the fixed frame further comprises a top frame and a bottom frame, and the lower side of the top frame and the upper side of the bottom frame are provided with a buffer pad.

[0016] The embodiment also provides a lifting writing device, which comprises a fixed frame and at least one writing board, the fixed frame comprises a side frame with a track, and the two sides of the writing board are slidingly arranged in the track and can be lifted along the track; the side of the writing board is provided with a transmission plate, and a pair of contacts are arranged on the two sides of the transmission plate; a pair of insulating strips are further arranged in the side frame, and a conductive sheet is arranged on the inner side of the insulating strip; the transmission plate is inserted into the inner side of the insulating strip, and the contacts of the transmission plate are in sliding contact with the conductive sheet.

[0017] The embodiment also provides a lifting writing device, which comprises a fixed frame, at least two writing boards and a lifting mechanism, the fixed frame comprises side frames with tracks, the two sides of the writing boards are slidingly installed in the tracks and can be lifted along the tracks, and the lifting mechanism comprises a transmission belt and a driving wheel, the transmission belt passes around the driving wheel, the two ends of the transmission belt are connected to the writing boards respectively, the outer side of the transmission belt is provided with a protective cover, a transmission wire is arranged in the protective cover, the two ends of the transmission wire are connected to the writing boards, the outer side of the protective cover is provided with an opening, and a spring wire passes through the opening and is connected to the transmission wire.

[0018] The embodiment also provides a lifting writing device, which comprises a fixed frame and at least one writing board, the fixed frame comprises a top frame, a bottom frame and side frames with tracks, the two sides of the writing board are slidingly installed in the tracks and can be lifted along the tracks, and the top frame or the bottom frame is provided with a first charging module, and the top or the bottom of the writing board is provided with a second charging module, so that the writing board is powered through the first charging module and the second charging module.

[0019] Optionally, the first charging module and the second charging module are wireless charging modules.

[0020] Optionally, the first charging module and the second charging module are pin charging modules.

[0021] The embodiment also provides a lifting writing device, which comprises a fixed frame and at least one writing board, the fixed frame comprises side frames with tracks, the two sides of the writing board are slidingly installed in the tracks and can be lifted along the tracks, the middle part of the side frame is provided with a first connecting point, the bottom of the writing board is provided with a second connecting point, the first connecting point and the second connecting point are connected through a transmission wire, and the transmission wire is used for power supply and / or signal transmission of the writing board.

[0022] The embodiment also provides a combined writing device, which comprises the lifting writing device, the lifting writing device has two and is located on the left and right sides, and a liquid crystal screen is arranged between the two lifting writing devices.

[0023] The one or more technical schemes provided in the embodiment of the utility model have at least the following technical effects or advantages:

[0024] The lifting writing device realizes the lifting of the writing board through the tracks arranged in the side frames, the transmission wire can be dynamically adjusted in length along with the lifting of the writing board, the transmission wire is arranged in the wire pipe, the transmission wire is connected to the writing board through the opening of the wire pipe, the opening ensures that the transmission wire can be stably connected to the writing board during the movement of the writing board, the transmission wire is surrounded in the wire pipe, the transmission wire is prevented from being wound and interfered with other components, and compared with the mode that the core shaft is penetrated in the transmission wire, the transmission wire is better protected.

[0025] The advantages of the additional aspects of the present utility model will be given in the following description, some of which will become apparent from the following description, or be understood through practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings accompanying the specification of this utility model form a part thereof, serve to provide further understanding of the utility model, and together with the description of the exemplary embodiments of the utility model, serve the purpose of describing the utility model. The exemplary embodiments of the utility model and its description are used to explain the utility model without forming an improper limitation on the utility model. In addition, the mutual distance or size is exaggerated for showing the position of each part, and the schematic diagram is only used for illustration.

[0027] Figure 1 is a schematic diagram of the combined writing device provided by the embodiment 1 of the present utility model;

[0028] Figure 2 is a schematic diagram of the side frame provided by the embodiment 1 of the present utility model;

[0029] Figure 3 is a schematic diagram of the installation of the light energy plate and the transmission line provided by the embodiment 1 of the present utility model;

[0030] Figure 4 is a schematic diagram of the installation side of the transmission line provided by the embodiment 1 of the present utility model;

[0031] Figure 5 is a schematic diagram of the connecting support provided by the embodiment 1 of the present utility model;

[0032] Figure 6 is a schematic diagram of the cooperation of the pulley assembly and the side frame provided by the embodiment 1 of the present utility model;

[0033] Figure 7 is a schematic diagram of the installation of the transmission line and the limiting piece provided by the embodiment 1 of the present utility model;

[0034] Figure 8 is a schematic diagram of another limiting piece provided by the embodiment 1 of the present utility model;

[0035] Figure 9 is a schematic diagram of the driving mechanism provided by the embodiment 1 of the present utility model;

[0036] Figure 10 is a schematic diagram of the connection of the transmission belt and the connecting support provided by the embodiment 1 of the present utility model;

[0037] Figure 11 is a schematic diagram of the buffer pad provided by the embodiment 1 of the present utility model;

[0038] Figure 12 is a schematic diagram of the power supply mode provided by the embodiment 2 of the present utility model;

[0039] Figure 13It is the power supply mode schematic diagram provided by the embodiment 3 of the utility model;

[0040] Figure 14 It is the power supply mode schematic diagram provided by the embodiment 4 of the utility model;

[0041] Figure 15 It is the power supply mode schematic diagram provided by the embodiment 5 of the utility model;

[0042] In the drawing: 1, fixed frame;11, top frame;12, side frame;121, wire pipe;122, track;123, conductive sheet;124, insulating strip;13, bottom frame;2, writing board;21, transmission plate;22, contact;3, transmission line;31, spring wire;4, connecting support;41, transmission groove;42, bending part;5, pulley assembly;6, driving mechanism;61, driving motor;62, driving wheel;63, transmission belt;64, shield;7, limiting piece;8, buffer pad;91, first charging module;92, second charging module; DETAILED DESCRIPTION

[0043] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless otherwise indicated, all technical and scientific terms used in the utility model have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. In addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of a feature, step, operation, device, component and / or their combination.

[0044] Embodiment 1

[0045] In order to solve the technical problems mentioned in the background art, the embodiment provides a lifting writing device. As shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The lifting writing device comprises a fixed frame 1, at least one writing board 2 and a transmission line 3, and the transmission line 3 is used for transmitting signals between the writing board 2 and the control unit of the device.

[0046] The writing board 2 can be a light energy board or other writing board that needs to be connected with a transmission line, for example, the light energy board transmits signals, erases power supply, powers the positioning device, etc., and for example, the ordinary board is a chalk board or a fountain pen board, transmits signals, powers the positioning device, etc.

[0047] The transmission line 3 connects the infrared system of the light energy board and the main control switching board, and connects the electronic equipment through the switching board to realize synchronous information transmission. Of course, it can be understood that different signals can be transmitted in different types of writing devices.

[0048] The fixed frame 1 has a side frame 12, in which a track 122 and a wire tube 121 are arranged, the wire tube 121 is arranged vertically, and the wire tube 121 is provided with an opening on the side facing the track 122, the opening penetrates the inside and outside space of the wire tube 121; the writing board 2 is slidingly installed on both sides of the track 122 of the side frame 12, the transmission line 3 is a flexible wire, such as a spring wire, which includes a spiral stretchable section arranged in the wire tube 121 and capable of stretching and contracting when the writing board is raised and lowered, and the top end of the transmission line penetrates the opening and is connected to the writing board 2.

[0049] The electrically interconnected lifting writing device mainly includes a fixed frame 1, a writing board 2 and a transmission line 3. The side frame 12 of the fixed frame 1 is designed to have a track 122 and a wire tube 121. The wire tube 121 is arranged vertically and provided with a through opening on the side facing the track 122. The opening is used to make the arrangement of the transmission line 3 more flexible and facilitate the connection of the transmission line 3 with the writing board 2 through the wire tube 121.

[0050] In this structure, the writing board 2 is installed on both sides of the track 122 of the side frame 12 and can slide smoothly on the track 122. The transmission line 3 can freely stretch and contract during the sliding process of the writing board 2, thereby preventing the entanglement or pulling of the line. One end of the transmission line 3 is fixed to the writing board 2, and the other end penetrates the wire tube 121 through the opening and is connected to the light energy writing board 2 of the system.

[0051] The writing board 2 includes a front plate and a back plate arranged in parallel front and back, and the side frame 12 includes two front and back regions, each of which is provided with a track 122 and a wire tube 121, the front plate is slidingly installed in the track 122 of the front side region of the side frame 12, and the back plate is slidingly installed in the track 122 of the back side region of the side frame 12. The writing board 2 includes a front plate and a back plate arranged in parallel front and back, forming a double-layer structure. The advantage of this design is that it increases the stability of the writing board 2, and the front and back plates can slide in different tracks 122, making the lifting of the front and back plates independent and smooth, while effectively avoiding the jamming or misalignment that may occur during use. Of course, it can be understood that the writing device can also be provided with more than two writing boards 2, and each writing board 2 is slidingly installed in the track of the side frame.

[0052] A connecting bracket 4 is installed at the top corner of the writing board 2, and a pulley assembly 5 is arranged on the connecting bracket 4, as shown in Figure 5 The pulley assembly 5 is slidingly installed in the track 122. The pulley assembly 5 can flexibly slide in the track 122, making the writing board 2 more smooth during lifting and not being affected by excessive resistance.

[0053] As shown in Figure 2 ,Figure 6 As shown, the track 122 includes two arc-shaped plates, the openings of which are oppositely arranged, and the pulley assembly 5 includes at least three pulleys, two of which are in close contact with one side of the arc-shaped plate, and the rest of the pulleys are eccentrically arranged and in close contact with the arc-shaped plate on the opposite side. Such design enables the pulley assembly 5 to be firmly clamped in the track 122, ensuring the stability of the sliding of the writing board 2 and avoiding the loosening problem between the pulley and the track 122. At the same time, since the pulleys are in close contact with the arc-shaped plates on both sides of the track 122, the balance and smoothness of the writing board 2 during lifting are ensured.

[0054] As shown in Figure 5 , Figure 7 , the bottom of the connecting bracket 4 is provided with a bent portion 42, a limiting piece 7 is mounted on the bent portion 42, and a positioning channel is formed between the limiting piece 7 and the bent portion 42. The top of the transmission line 3 is bent to pass through the positioning channel and is connected to the writing board 2. The positioning channel between the bent portion 42 and the limiting piece 7 effectively prevents the transmission line 3 from loosening or falling off during use due to lifting operation, ensuring the stable connection of the line during lifting of the writing board 2, and avoiding the swinging or damage of the line during sliding of the writing board 2.

[0055] In another embodiment, a limiting piece 7 is mounted on the side of the writing board 2, and a positioning channel is formed in the limiting piece 7. The top of the transmission line 3 is bent to pass through the positioning channel and is connected to the writing board 2. By separating the limiting piece 7 from the connecting bracket 4 and directly mounting the limiting piece 7 on the side of the writing board 2, the installation position of the transmission line 3 can be lowered, thereby shortening the length of the transmission line 3 and reducing the cost.

[0056] One end of each of the two groups of transmission lines 3 is connected to the front and rear light energy plate infrared systems, the other end is connected to the bottom main control switching board, and the electronic equipment is connected through the switching board to realize synchronous information transmission.

[0057] As shown in Figure 9 , Figure 10 , the lifting writing device further includes a driving mechanism 6 mounted on the fixed frame 1, which includes a driving motor 61, a driving wheel 62 and a transmission belt 63. The driving wheel 62 is mounted on the output shaft of the driving motor 61, and the transmission belt 63 passes around the driving wheel 62. The two ends of the transmission belt 63 are connected to the writing board 2. Through the driving of the driving motor 61, the transmission belt 63 realizes the automatic lifting operation of the writing board 2, and the connection mode of the transmission belt 63 ensures the stability and smoothness of the lifting movement. The lower part of the fixed frame 1 is provided with two groups of motor driving control sensors, which can control the opening of the driving motor 61 and complete the up-down operation limitation of the light energy plate.

[0058] As shown in Figure 5As shown, the connecting bracket 4 is provided with a transmission groove 41, and the end of the transmission belt 63 is bent and sleeved in the transmission groove 41. Through the design of the transmission groove 41, the end of the transmission belt 63 can be more firmly fixed with the connecting bracket 4, further improving the running stability of the system.

[0059] The cooperation between the driving wheel 62 and the transmission belt 63 can have various implementation manners. In a first implementation manner, the driving wheel 62 is a synchronous wheel, and the transmission belt 63 is a synchronous belt. The cooperation between the synchronous wheel and the synchronous belt can ensure that the tooth structures of the two are engaged with each other during the lifting of the writing board 2, thereby ensuring the transmission accuracy and the consistency of the lifting action, and being suitable for scenes with high transmission accuracy requirements.

[0060] In another implementation manner, the driving wheel 62 can adopt a chain wheel, and the transmission belt 63 is a transmission chain. The cooperation between the chain wheel and the transmission chain is suitable for transmission of larger loads, especially when the writing board 2 needs to bear a heavy load, the structure of the chain wheel and the transmission chain can provide stronger pulling force and ensure the efficient operation of the transmission system during lifting. These two structure forms can be selected according to the specific application scene and requirements, and have strong adaptability and flexibility. Of course, it can also be understood that other ways such as steel wire flat belt or steel wire rope can also be used.

[0061] The fixed frame 1 further includes a top frame 11, and the lower side of the top frame 11 and the upper side of the bottom frame 13 are both provided with a buffer pad 8, as shown in Figure 11 The buffer pad 8 serves to provide additional buffering when the writing board 2 is lifted to the limit position, avoiding the collision of the writing board 2 with the fixed frame 1, thereby preventing damage to the writing board 2 and the frame structure. The buffer pad 8 can be made of an elastic material, such as silicone or rubber, which can effectively absorb impact force when the writing board 2 is lifted, thereby prolonging the service life of the equipment. At the same time, the buffer pad 8 can also reduce the noise of the writing board 2 when moving to the top or bottom, improve the user experience, and also prevent pinching hands.

[0062] Embodiment 2

[0063] The lifting writing device provided in this embodiment includes a fixed frame 1 and at least one writing board 2, the fixed frame 1 includes a side frame 12 with a track 122, and the two sides of the writing board 2 are slidingly installed in the track 122 and can be lifted along the track 122, as shown in Figure 12 The side of the writing board 2 is provided with a transmission plate 21, and a pair of contacts 22 are arranged on the two sides of the transmission plate 21. A pair of insulating strips 124 are further arranged in the side frame 12, and a conductive sheet 123 is arranged on the inner side of the insulating strip 124. The transmission plate 21 is inserted into the inner side of the insulating strip 124, and the contacts 22 of the transmission plate 21 are in sliding contact with the conductive sheet 123.

[0064] Specifically, the fixed frame 1 is composed of two side frames 12, on which longitudinal tracks 122 are provided. The sliding assemblies on both sides of the writing board 2 are embedded in the tracks 122 of the side frames 12, and mainly slide in the vertical direction. The inner side of the side frame 12 is provided with an insulating strip 124. The transmission plate 21 on the side of the writing board 2 is a long strip-shaped conductive structure, both ends of which are provided with contacts 22 that can slide and contact the conductive piece 123 on the inner side of the insulating strip 124 with the lifting movement. The insulating strip 124 is made of polytetrafluoroethylene, which has good electrical insulation and wear resistance. The conductive piece 123 is installed on the inner side of the insulating strip 124 by embedding or fixing, and is connected with an external power supply or signal system.

[0065] When the writing board 2 is lifted along the track 122, the transmission plate 21 always maintains contact with the conductive piece 123 through its contacts 22, ensuring continuous power supply or signal transmission of the writing board 2 during movement. This structure avoids dust and leakage problems through the protection of the insulating strip 124, thereby improving the reliability and safety of the equipment.

[0066] Embodiment 3

[0067] The lifting writing device provided in this embodiment includes a fixed frame 1, at least two writing boards 2 and a lifting mechanism. The fixed frame 1 includes a side frame 12 with a track 122, and the writing boards 2 are slidingly installed on both sides of the track 122 and can be lifted along the track 122. Figure 13 As shown in the figure, the lifting mechanism includes a transmission belt 63 and a drive wheel 62, the transmission belt 63 passes around the drive wheel 62, both ends of the transmission belt 63 are connected to the writing board 2 respectively, the outer side of the transmission belt 63 is provided with a protective cover 64, the protective cover 64 is installed on the transmission belt 63 and can bend with the transmission belt 63, the protective cover 64 adopts an existing structure, such as an organ type protective cover 64. A transmission line 3 is arranged in the protective cover 64, both ends of the transmission line 3 are connected to the writing board 2, an opening is provided on the outer side of the protective cover 64, and a spring wire 31 passes through the opening and is connected to the transmission line 3.

[0068] The material of the protective cover 64 is metal or plastic, and an inner cavity is arranged for accommodating the transmission line 3. The transmission line 3 can be a flexible cable, both ends of which are connected to the writing board 2 through a plug connector, providing a power supply or data transmission channel for the writing board 2. The opening on the outer side of the protective cover 64 is used to lead out the spring wire 31, which is connected to the transmission line 3, providing additional movement buffering function to avoid damage caused by cable pulling.

[0069] After the motor is started, the drive wheel 62 drives the transmission belt 63 to move, and the writing board 2 rises and falls synchronously with the transmission belt 63. The transmission line 3 inside the protective cover 64 provides a continuous electrical connection when the writing board 2 moves, while the spring wire 31 effectively relieves the tensile force that may be generated during the movement, extending the service life of the equipment. This structure realizes stable lifting and lowering of the multi-board system, while improving the durability and safety of the electrical connection.

[0070] Example 4

[0071] The lifting writing device provided in this embodiment, such as Figure 14 As shown, the device includes a fixed frame 1 and at least one writing board 2. The fixed frame 1 includes a top frame 11, a bottom frame 13, and a side frame 12 with a track 122. The two sides of the writing board 2 are slidably mounted in the track 122 and can be raised and lowered along the track 122. At least one of the top frame 11 and the bottom frame 13 is provided with a first charging module 91, and at least one of the top and bottom of the writing board 2 is provided with a second charging module 92. The writing board 2 is powered by the first charging module 91 and the second charging module 92.

[0072] For example, a first charging module 91 is provided on both the top frame 11 and the bottom frame 13, and a second charging module 92 is provided on both the top and bottom of the writing board 2. When the writing board 2 rises to the top frame 11 or falls to the bottom frame 13, the second charging module 92 automatically connects with the first charging module 91 to charge the writing board 2 or transmit signals.

[0073] Alternatively, the first charging module 91 may be provided only on the top frame 11, and the writing board 2 may be provided only on the top of the second charging module 92. When the writing board 2 rises to the top frame 11, the second charging module 92 and the first charging module 91 will automatically dock to charge or transmit signals to the writing board 2.

[0074] Alternatively, the first charging module 91 may be provided only on the bottom frame 13, and the writing board 2 may be provided only at the bottom with the second charging module 92. When the writing board 2 descends to the bottom frame 13, the second charging module 92 and the first charging module 91 may automatically dock to charge or transmit signals to the writing board 2.

[0075] The wireless charging module provides efficient power without physical contact, while the pin-type charging module achieves a higher charging rate through physical contact. This design ensures that the writing tablet 2 does not require frequent battery replacements during operation, improving the device's continuous working capability.

[0076] In one implementation, such as Figure 14The enlarged view on the left shows that the first charging module 91 and the second charging module 92 are wireless charging modules. Each wireless charging module consists of a transmitting coil and a receiving coil, embedded in the top frame 11 and the top of the writing board 2, or the bottom frame 13 and the bottom of the writing board 2, respectively. Energy is transferred between the coils via electromagnetic induction, with matching circuitry for energy management. The module incorporates a temperature sensor and protection circuitry to prevent overheating due to prolonged charging. Furthermore, when signal transmission is required, wireless communication methods such as Wi-Fi, Bluetooth, ZigBee, and RFID can be used.

[0077] In another implementation, such as Figure 14 The enlarged view on the right shows that the first charging module 91 and the second charging module 92 are pin-type charging modules. The pin-type charging module has conductive pins inside the top frame 11 and corresponding sockets on the top of the writing board 2, or the two can be interchanged. The surfaces of the pins and sockets are plated with an anti-oxidation metal layer, such as gold or nickel, to improve conductivity and durability. Compared to wireless charging, the pin-type charging module achieves a higher charging rate through physical contact.

[0078] Example 5

[0079] The lifting writing device provided in this embodiment includes a fixed frame 1 and at least one writing board 2. The fixed frame 1 includes a side frame 12 with a track 122. The two sides of the writing board 2 are slidably installed in the track 122 and can be raised and lowered along the track 122. Figure 15 As shown, a first connection point is provided in the middle of the side frame 12, and a second connection point is provided at the bottom of the writing board 2. The first connection point and the second connection point are connected by a transmission line 3, which is used to supply power to the writing board 2 and / or transmit signals.

[0080] Transmission line 3 is a flexible cable extending from the first connection point to the second connection point, used to provide electrical power or transmit signals. Transmission line 3 is covered with an insulating sheath, with appropriate margin design to accommodate the lifting and lowering movement of writing board 2.

[0081] During the lifting and lowering process of the writing board 2, the second connection point always maintains reliable contact with the first connection point, and the transmission line 3 provides stable power supply or transmits signals. This design ensures the continuity of the writing board 2's function, while avoiding the messy arrangement of external cables. The transmission line 3 is located on the back of the writing board 2, improving the overall aesthetics and practicality of the device.

[0082] The above mainly introduces the power supply methods. It should be understood that the above methods can also be used for signal transmission. The power supply method and the signal transmission method can be the same or different transmission methods can be used. Those skilled in the art can make reasonable choices according to their needs.

[0083] Example 6

[0084] The embodiment also provides a combined writing device, which comprises two lifting writing devices arranged on the left and right sides and a liquid crystal screen arranged between the two lifting writing devices.

[0085] The left and right writing boards 2 are independently controlled by respective driving mechanisms 6, and the height of each writing board 2 can be adjusted according to actual needs, so that different writing and display requirements can be flexibly adapted. The liquid crystal screen arranged between the two lifting writing devices can be used to display multimedia content, electronic documents or writing auxiliary information, so that the interactivity and information display capability of the system are greatly improved. The combination of the liquid crystal screen and the lifting writing device makes the device not only have the traditional writing function, but also can be used as a modern teaching or conference tool.

[0086] Although the specific embodiments of the utility model are described in combination with the drawings, the description is not a limitation on the protection scope of the utility model, and those skilled in the art should understand that various modifications or deformations made by those skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A lifting writing device, characterized in that, It includes a fixed frame and at least one writing board, the fixed frame including a side frame with a track, the two sides of the writing board being slidably mounted in the track and capable of moving up and down along the track; A transmission line is connected to one side of the writing board. The transmission line is used to transmit signals between the writing board and the control unit of the device. A conduit is also provided in the side frame. The transmission line is installed in the conduit and can extend and retract when the writing board is raised and lowered. An opening is provided on one side of the conduit for the transmission line to pass through.

2. The lifting writing device as described in claim 1, characterized in that, The writing board includes a front plate and a back plate arranged in parallel front and back. The side frame includes two regions, front and back, each region being provided with a track and a conduit. The front plate is slidably installed in the track in the front region of the side frame, and the back plate is slidably installed in the track in the rear region of the side frame.

3. The lifting writing device as described in claim 1, characterized in that, A connecting bracket is installed at the top corner of the writing board, and a pulley assembly is provided on the connecting bracket. The pulley assembly is slidably installed in the track.

4. The lifting writing device as described in claim 3, characterized in that, The track includes two arc-shaped plates with their openings facing each other. The pulley assembly includes at least three pulleys, two of which are in close contact with one side of the arc-shaped plate, and the remaining pulleys are in close contact with the opposite side of the arc-shaped plate.

5. The lifting writing device as described in claim 3, characterized in that, The bottom of the connecting bracket is provided with a bend, and a limiting member is installed on the bend. A positioning channel is formed between the limiting member and the bend. The top of the transmission line is bent through the positioning channel and connected to the writing board.

6. The lifting writing device as described in claim 1, characterized in that, The writing board is fitted with a limiting member on its side, and the limiting member has a positioning channel. The top of the transmission line is bent through the positioning channel and connected to the writing board.

7. The lifting writing device as described in claim 4, characterized in that, The lifting writing device also includes a drive mechanism, which is mounted on a fixed frame and includes a drive motor, a drive wheel, and a transmission belt. The drive wheel is mounted on the output shaft of the drive motor, and the transmission belt passes around the drive wheel, with both ends of the transmission belt connected to the writing board.

8. The lifting writing device as described in claim 7, characterized in that, The connecting bracket is provided with a transmission groove, and the end of the transmission belt is bent and sleeved in the transmission groove.

9. The lifting writing device as described in claim 7, characterized in that, The drive wheel is a synchronous pulley, and the transmission belt is a synchronous belt; or, the drive wheel is a sprocket, and the transmission belt is a transmission chain.

10. The lifting writing device as described in claim 1, characterized in that, The fixed frame also includes a top frame and a bottom frame, and cushioning pads are provided on the lower side of the top frame and the upper side of the bottom frame.

11. A lifting writing device, characterized in that, It includes a fixed frame and at least one writing board, the fixed frame including a side frame with a track, the two sides of the writing board being slidably mounted in the track and capable of moving up and down along the track; The writing board has a transmission plate on its side, and a pair of contacts on both sides of the transmission plate. The side frame also has a pair of insulating strips, and a conductive sheet is provided on the inner side of the insulating strips. The transmission plate is inserted into the inner side of the insulating strips, and the contacts of the transmission plate are in sliding contact with the conductive sheet.

12. A lifting writing device, characterized in that, It includes a fixed frame, at least two writing boards, and a lifting mechanism. The fixed frame includes a side frame with a track, and the two sides of the writing boards are slidably mounted in the track and can be raised and lowered along the track. The lifting mechanism includes a transmission belt and a drive wheel. The transmission belt passes around the drive wheel, and both ends of the transmission belt are connected to the writing board. A protective cover is provided on the outside of the transmission belt, and a transmission line is provided inside the protective cover. Both ends of the transmission line are connected to the writing board. An opening is provided on the outside of the protective cover, and a spring wire passes through the opening and is connected to the transmission line.

13. A lifting writing device, characterized in that, It includes a fixed frame and at least one writing board. The fixed frame includes a top frame, a bottom frame, and a side frame with a track. The two sides of the writing board are slidably mounted in the track and can move up and down along the track. At least one of the top frame and the bottom frame is provided with a first charging module, and at least one of the top and bottom of the writing board is provided with a second charging module, which powers the writing board through the first charging module and the second charging module.

14. The lifting writing device as described in claim 13, characterized in that, The first charging module and the second charging module are wireless charging modules.

15. The lifting writing device as described in claim 13, characterized in that, The first charging module and the second charging module are pin-type charging modules.

16. A lifting writing device, characterized in that, It includes a fixed frame and at least one writing board, the fixed frame including a side frame with a track, the two sides of the writing board being slidably mounted in the track and capable of moving up and down along the track; A first connection point is provided in the middle of the side frame, and a second connection point is provided at the bottom of the writing board. The first connection point and the second connection point are connected by a transmission line, which is used to power the writing board and / or transmit signals.

17. A combined writing device, characterized in that, The device includes a lifting writing device as described in any one of claims 1-16, wherein there are two lifting writing devices located on the left and right sides, and an LCD screen is disposed between the two lifting writing devices.

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