Data line pulling mechanism and intelligent blackboard

Abstract

The invention relates to a data line collecting and pulling mechanism and an intelligent blackboard, the data line collecting and pulling mechanism is used in a terminal, the terminal comprises a first terminal and a second terminal capable of moving relative to the first terminal, the data line collecting and pulling mechanism comprises a data line and a counterweight part, and the data line is used for being in communication connection with the first terminal and the second terminal; the counterweight part can move relative to the second terminal, the counterweight part is arranged on the data line, and the gravity of the counterweight part provides pulling force for the data line; wherein when the first terminal moves towards the direction close to the second terminal, the data line is stretched under the gravity action of the counterweight piece; and when the first terminal moves in the direction far away from the second terminal, the first terminal is guided to move upwards under the pulling force of the data line. By means of the structural form, the phenomena of winding, knotting, arching and the like caused by contact of the data lines can be effectively avoided, and therefore the reliability of communication connection of the two terminals is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of smart tablet computers, and in particular to a data cable retracting mechanism and a smart blackboard. Background Art

[0002] With the continuous improvement of educational informatization, a large number of smart blackboards are installed in classrooms. An electronic screen is placed in the middle, and two layers of blackboards are placed on both sides. The inner layer is a fixed blackboard, and the outer layer is a mobile electronic memory writing blackboard. The memory writing blackboard can be touched through infrared technology. When writing on the board, the writing trajectory can be recorded on the middle electronic screen and stored in the computer.

[0003] A data cable (USB cable for short) needs to be connected to the mobile memory writing board to connect to the electronic screen computer to realize the infrared touch function. However, during the movement of the memory writing board, due to the change in relative position, the touch cable is either too long or easily tangled and pulled. Summary of the Invention

[0004] Based on this, it is necessary to provide a data cable retracting mechanism and an intelligent blackboard to address the technical problem that data cables are easily tangled during the movement of mobile writing boards in the existing technology.

[0005] A data line retracting mechanism is used in a terminal, wherein the terminal includes a first terminal and a second terminal that can move relative to the first terminal, and the data line retracting mechanism includes:

[0006] a data line, used for communicating with the first terminal and the second terminal;

[0007] a counterweight, movable relative to the second terminal, the counterweight being disposed on the data cable, the gravity of the counterweight providing tension for the data cable;

[0008] When the first terminal moves toward the second terminal, the data line is pulled and stretched downward by the gravity of the counterweight; when the first terminal moves away from the second terminal, the counterweight moves upward under the pulling force of the data line.

[0009] The data cable retraction mechanism provided by this technical solution achieves a communication connection between the first and second terminals by connecting the data cable to the communication cable. By providing a counterweight on the data cable and configuring the counterweight to be movable relative to the second terminal, when the first terminal moves toward the second terminal, the counterweight can move in the direction of gravity under its own weight. Since the counterweight is provided on the data cable, the weight of the counterweight can be applied to the data cable. Therefore, under the weight of the counterweight, the data cable also moves downward along the direction of gravity, thereby pulling and stretching the data cable. This effectively avoids entanglement, knotting, and arching caused by contact between the data cables, thereby improving the reliability of the communication connection between the two terminals. When the first terminal moves away from the second terminal, the data cable moves with the movement of the first terminal. At this time, the portion of the data cable that cooperates with the counterweight moves upward under the pulling force of the first terminal, and the counterweight moves upward with the data cable. The above structure can effectively avoid entanglement, knotting, arching and other phenomena caused by contact between data lines, thereby improving the reliability of the communication connection between the two terminals.

[0010] In some embodiments, the data cable retracting mechanism further includes a support bracket, the support bracket is fixedly connected to the second terminal, a support portion is provided on the support bracket, and the data cable is mounted on the support portion.

[0011] By fixing a support bracket on the second terminal and providing a support portion on the support bracket, the data cable is placed on the support portion to support the data cable through the support portion, thereby preventing the end of the data cable connected to the second terminal for communication from being bent under the gravity of the counterweight, causing the data cable to be damaged or detached from the second terminal, resulting in failure of the communication connection.

[0012] In some embodiments, a guide groove is configured on the support portion, and a portion of the data line is disposed in the guide groove.

[0013] By providing a guide groove on the support portion and positioning a portion of the data cable within the guide groove, the data cable is restrained by the guide groove, thereby preventing the data cable from sliding off the support portion. This improves the reliability of the data cable on the support portion, thereby improving the reliability of the communication connection between the data cable and the second terminal and reducing the risk of damage to the data cable itself.

[0014] In some embodiments, the data cable retracting mechanism further includes a guide wheel, the guide wheel is rotatably connected to the support bracket, the data cable is movably slidably arranged on the guide wheel, the guide wheel is arranged opposite to and spaced from the support portion, and the counterweight is arranged on the line segment of the data cable between the guide wheel and the support portion.

[0015] The data cable is guided by a guide wheel provided on the support bracket, and the data cable moves downward more smoothly when the counterweight pulls the data cable downward by rotating the guide wheel.

[0016] In some embodiments, the counterweight is configured as a gravity ring, which is sleeved on the data cable. When the first terminal moves toward the second terminal, the gravity ring moves along the gravity direction under its own gravity.

[0017] In this embodiment, by configuring the counterweight in the form of a gravity ring, and by placing the gravity ring over the data cable, when the first terminal moves toward the second terminal, the data cable moves downward and is straightened under the weight of the gravity ring. This prevents the data cable from becoming tangled or knotted.

[0018] In some embodiments, the counterweight is configured as a roller, the line segment on the data cable located between the guide wheel and the support portion is slid on the roller, and the roller is movably connected to the support bracket. When the first terminal moves toward the second terminal, the roller moves relative to the support bracket along the direction of gravity under the action of its own gravity.

[0019] In this technical solution, the counterweight is set to the structure of a roller, and the line segment of the data cable between the guide wheel and the support part is slid on the roller, and the roller is movably connected to the support bracket. When the first terminal moves in the direction close to the second terminal, the roller moves downward along the direction of gravity under the action of its own gravity. Since the data cable is slid on the roller, the roller applies a downward pulling force to the data cable. As the roller moves downward, the data cable is stretched, thereby preventing the overlapping parts of the data cable from being entangled, knotted, arched, etc.

[0020] In some embodiments, the support bracket is provided with a guide groove extending along the direction of gravity, and the roller is guided and matched with the guide groove.

[0021] By arranging a guide groove extending along the direction of gravity on the support frame and coordinating the roller with the guide groove, when the roller moves downward under its own gravity, the guide groove guides the movement of the roller, so that the movement of the data cable and the roller is always on the same motion trajectory, which can more reliably ensure that the data cable is not entangled, overlapped, or arched during the movement.

[0022] In some embodiments, the roller comprises:

[0023] A guide shaft is slidably arranged in the guide groove;

[0024] The wheel body is rotatably connected to the guide shaft. A first limiting groove is provided on the outer peripheral surface of the wheel body, and the data line is slidably arranged in the first limiting groove.

[0025] In this technical solution, the guide shaft and guide groove cooperate to ensure the stability of the roller's movement. The wheel body and the guide shaft are rotatably connected, allowing the data cable to move more smoothly under the force of the wheel body. Furthermore, a first limiting groove is provided on the wheel body, and the data cable is slidably positioned within the first limiting groove to ensure the reliable cooperation between the data cable and the roller, thereby ensuring the reliability of the wheel body in pulling the data cable.

[0026] In some embodiments, the data cable retracting mechanism further comprises:

[0027] The distributor is fixedly connected to the second terminal, the distributor is communicatively connected to the second terminal, and the data line is communicatively connected to the distributor.

[0028] By providing a distributor, the second terminal can be connected to multiple data lines, thereby achieving communication connection between the second terminal and multiple first terminals.

[0029] A smart blackboard, comprising the data cable retracting mechanism described above, and further comprising:

[0030] An electronic display screen, one end of the data line being communicatively connected to the electronic display screen;

[0031] A memory writing board is slidably connected to the electronic display screen, and the other end of the data line is communicatively connected to the memory writing board.

[0032] By using the above-mentioned data cable retraction mechanism in the smart blackboard, when the memory writing board moves closer to the electronic display screen, the data cable retraction mechanism prevents the data cables from being entangled, knotted or arched, thereby improving the reliability of the communication connection between the memory writing board and the electronic display screen in the smart blackboard.

[0033] Beneficial effects of the present invention:

[0034] The present invention provides a data cable retraction mechanism that connects a data cable to a first terminal and a second terminal to achieve a communication connection between the first and second terminals. A counterweight is provided on the data cable, and the counterweight is configured to be movable relative to the second terminal. When the first terminal moves toward the second terminal, the counterweight moves in the direction of gravity under its own weight. Because the counterweight is provided on the data cable, its gravity is applied to the data cable. Consequently, the data cable also moves downward along with the counterweight under the weight of the counterweight, thereby pulling and extending the data cable. This effectively prevents tangling, knotting, and arching caused by contact between the data cables, thereby improving the reliability of the communication connection between the two terminals. When the first terminal moves away from the second terminal, the data cable moves with the first terminal. At this time, the portion of the data cable that cooperates with the counterweight moves upward under the tension of the first terminal, and the counterweight moves upward with the data cable. The above structure can effectively avoid entanglement, knotting, arching and other phenomena caused by contact between data lines, thereby improving the reliability of the communication connection between the two terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A front external outline diagram of a smart blackboard provided by an embodiment of the present invention;

[0036] Figure 2 The back side external outline of the smart blackboard provided by one embodiment of the present invention;

[0037] Figure 3 This is a front view of the data cable retracting mechanism provided by one embodiment of the present invention after being connected to the smart blackboard;

[0038] Figure 4 This is a schematic diagram of the three-dimensional structure of the data cable retracting mechanism provided by one embodiment of the present invention connected to the smart blackboard;

[0039] Figure 5 An enlarged schematic diagram of a data cable retracting mechanism provided by one embodiment of the present invention;

[0040] Figure 6 This is a front view of a data cable retracting mechanism provided by another embodiment of the present invention connected to a smart blackboard;

[0041] Figure 7 A schematic diagram of the three-dimensional structure of a data cable retracting mechanism provided by another embodiment of the present invention connected to a smart blackboard;

[0042] Figure 8 This is an enlarged schematic diagram of a data cable retracting mechanism provided in another embodiment of the present invention.

[0043] Reference numerals:

[0044] Data cable retracting mechanism 100; data cable 110; support bracket 120; support portion 121; guide groove 122; gravity ring 130; roller 140; guide shaft 141; wheel body 142; guide wheel 150; distributor 160; first terminal 200; second terminal 300. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0048] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0051] With the continuous improvement of educational informatization, a large number of smart blackboards are installed in classrooms. An electronic screen is placed in the middle, and two layers of blackboards are placed on both sides. The inner layer is a fixed blackboard, and the outer layer is a mobile electronic memory writing blackboard. The memory writing blackboard can be touched through infrared technology. When writing on the board, the writing trajectory can be recorded on the middle electronic screen and stored in the computer.

[0052] Based on this, a data cable (USB cable for short) needs to be connected to the mobile memory writing board to connect to the electronic screen computer to realize the infrared touch function. However, during the movement of the memory writing board, due to the change in relative position, the touch cable is either too long or easily knotted and pulled. For example, when the mobile memory writing board moves to the side of the electronic screen, the distance between the two ends of the data cable is the farthest, and the data cable is equivalent to being straightened at this time; and when the mobile memory writing board moves in the direction close to the electronic screen, the distance between the two ends of the data cable becomes closer and closer, that is, part of the data cable is equivalent to being bent. Since the data cable in the prior art is in a free state without restraint, when the mobile memory writing board overlaps with the electronic screen, part of the data cable will overlap, entangle or even knot. The next time the mobile memory writing board needs to be moved in the direction away from the electronic screen, it is easy to break the data cable or pull the data cable out of the electronic screen or the mobile memory writing board, resulting in the inability to achieve communication connection between the two.

[0053] An embodiment of the present invention provides a data cable retraction mechanism so that when the mobile memory writing board moves relative to the electronic screen, the data retraction mechanism can straighten the portion of the data cable that is easily folded and entangled, thereby preventing the data cable from being entangled, knotted or arched, thereby improving the reliability of the communication connection between the mobile memory writing board and the electronic screen.

[0054] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a smart blackboard, which includes an electronic display screen, a fixed blackboard and a memory writing board. Specifically, a fixed blackboard is provided on each side of the electronic display screen, and a memory writing board is provided on the front side of the fixed blackboard, wherein the memory writing board can be moved relative to the fixed blackboard to overlap with the electronic display screen; it can also be moved to overlap with the fixed blackboard. It should be noted that the fixed blackboard is the same as the existing ordinary blackboard or whiteboard and can only be used for writing. The memory writing board is communicatively connected to the electronic display screen via a data cable 110, so that the running track running on the writing board can be stored in the computer of the electronic display screen and can be displayed on the electronic display screen. It should be noted that the smart blackboard provided in this embodiment also includes the following data cable 110 retracting mechanism 100.

[0055] like Figures 3 to 8 As shown, an embodiment of the present invention provides a data cable retracting mechanism 100 for use in a terminal, wherein the terminal includes a first terminal 200 and a second terminal 300 that can move relative to the first terminal 200, and the data cable retracting mechanism 100 includes a data cable 110 and a counterweight, wherein the data cable 110 is used to communicate with the first terminal 200 and the second terminal 300; the counterweight can move relative to the second terminal 300, the counterweight is arranged on the data cable, and the gravity of the counterweight provides tension for the data cable; wherein, when the first terminal 200 moves toward the direction approaching the second terminal 300, the data cable 110 is pulled and extends downward under the action of the gravity of the counterweight; when the first terminal 200 moves toward the direction away from the second terminal 300, it is guided to move upward under the tension of the data cable 110.

[0056] The data cable retraction mechanism 100 provided by the present technical solution realizes a communication connection between the first terminal 200 and the second terminal 300 by connecting the data cable 110 to the communication connection between the first terminal 200 and the second terminal 300. By providing a counterweight on the data cable 110 and configuring the counterweight to be movable relative to the second terminal 300, when the first terminal 200 moves toward the second terminal 300, the counterweight can move in the direction of gravity under the action of its own weight. Since the counterweight is provided on the data cable 110, the weight of the counterweight can be applied to the data cable 110. Therefore, under the action of the weight of the counterweight, the data cable 110 also moves downward along the direction of gravity with the counterweight, thereby allowing the data cable 110 to be pulled and stretched downward. This effectively avoids the phenomenon of entanglement, knotting, and arching caused by the contact of the data cable 110, thereby improving the reliability of the communication connection between the two terminals. When the first terminal 200 moves away from the second terminal 300, the data cable 110 moves with the movement of the first terminal 200. At this time, the portion of the data cable 110 that cooperates with the counterweight moves upward under the tension of the first terminal 200, and the counterweight moves upward along with the data cable 110. This structure effectively prevents entanglement, knotting, and arching of the data cable 110 due to contact, thereby improving the reliability of the communication connection between the two terminals.

[0057] It should be noted that in this embodiment, the first terminal 200 may be a writing tablet, and the second terminal 300 may be an electronic display screen. The data cable retraction mechanism 100 also includes a distributor 160, which is fixedly connected to the second terminal 300. The distributor 160 is in communication with the second terminal 300, and the data cable 110 is in communication with the distributor 160. The provision of the distributor 160 enables the second terminal 300 to connect to multiple data cables 110, thereby enabling communication between the second terminal 300 and multiple first terminals 200.

[0058] It can be understood that the distributor 160 is provided with multiple USB interfaces. When memory writing boards are provided on both sides of the electronic display screen, one end of the two data cables 110 are respectively plugged into the USB interfaces on the distributor 160 to realize communication connection between one end of the data cable 110 and the electronic display screen, and the other ends of the two data cables 110 are respectively communicated with the two memory writing boards, so that the electronic display screen can be communicated with the two memory writing boards at the same time.

[0059] like Figures 3 to 5As shown, in some embodiments, the data cable retracting mechanism 100 further includes a support bracket 120, which is fixedly connected to the second terminal 300. The support bracket 120 is provided with a support portion 121, and the data cable 110 is placed on the support portion 121. By fixing the support bracket 120 to the second terminal 300 and providing the support portion 121 on the support bracket 120, the data cable 110 is placed on the support portion 121, so that the data cable 110 is supported by the support portion 121, thereby preventing the end of the data cable 110 that is connected to the second terminal 300 for communication from being bent under the weight of the counterweight, causing the data cable 110 to be damaged or separated from the second terminal 300, resulting in a failure of the communication connection.

[0060] Specifically, the support bracket 120 is a sheet metal part, and the support bracket 120 is fixedly connected to the housing of the second terminal 300 by bolts. A protrusion extending away from the second terminal 300 is provided on the side of the support bracket facing the distributor 160. The protrusion is the above-mentioned support portion 121. The data cable 110 led out from the distributor 160 is placed on the protrusion. In this embodiment, the protrusion is configured as an L-shaped structure, and the corners of the L-shaped structure are configured as arc structures. One side of the L-shaped structure is used to support the data cable 110 led out from the distributor 160, and the other side of the L-shaped structure is used to guide the data cable 110 to extend downward.

[0061] In some embodiments, the support portion 121 is configured with a guide groove (not shown in the drawings), and a portion of the data cable 110 is positioned within the guide groove. By providing the guide groove on the support portion 121 and positioning the portion of the data cable 110 within the guide groove, the data cable 110 is restrained by the guide groove, thereby preventing the data cable 110 from sliding off the support portion 121. This improves the reliability of the data cable 110 on the support portion 121, thereby improving the reliability of the communication connection between the data cable 110 and the second terminal 300 and reducing the risk of damage to the data cable 110 itself.

[0062] Specifically, the guide groove on the support portion 121 includes a horizontal groove section and a vertical groove section, which connect at the corner of the support portion 121. The data cable 110 extending from the distributor 160 is placed in the horizontal groove section and then extends downward along the vertical groove section. The groove wall of the guide groove restrains the data cable 110, preventing it from being separated from the support portion 121.

[0063] like Figures 3 to 5As shown, in some embodiments, the data cable retracting mechanism 100 further includes a guide wheel 150, which is rotatably connected to the support bracket 120. The data cable 110 is movably slidably mounted on the guide wheel 150. The guide wheel 150 is disposed opposite and spaced apart from the support portion 121, and a counterweight is disposed on the segment of the data cable 110 between the guide wheel 150 and the support portion 121. By disposing the guide wheel 150 on the support bracket 120, the data cable 110 is guided by the guide wheel 150. At the same time, the rotation of the guide wheel 150 allows the data cable 110 to move downward more smoothly when the counterweight pulls the data cable 110 downward.

[0064] Specifically, the guide wheel 150 is rotatably connected to the support bracket 120 through a rotating shaft. A second limiting groove is provided on the outer peripheral surface of the guide wheel 150. The second limiting groove is an annular groove. The data cable 110 is slid in the second limiting groove. The second limiting groove is used to limit the data cable 110 sliding on the guide wheel 150, thereby preventing the data cable 110 from detaching from the guide wheel 150.

[0065] like Figures 3 to 5 As shown, in some embodiments, the counterweight is configured as a gravity ring 130, which is mounted on the data cable 110. When the first terminal 200 moves toward the second terminal 300, the gravity ring 130 moves in the direction of gravity under its own weight. In this embodiment, by configuring the counterweight in the form of a gravity ring 130 and mounting the gravity ring 130 on the data cable 110, when the first terminal 200 moves toward the second terminal 300, the data cable 110 moves downward and is straightened under the weight of the gravity ring 130. This prevents the data cable 110 from becoming tangled or knotted.

[0066] like Figures 6 to 8As shown, in some embodiments, the counterweight is configured as a roller 140, and the line segment on the data cable 110 between the guide wheel 150 and the support portion 121 is slidably disposed on the roller 140. The roller 140 is movably connected to the support bracket 120. When the first terminal 200 moves toward the second terminal 300, the roller 140 moves relative to the support bracket 120 along the direction of gravity under the action of its own gravity. In this technical solution, the counterweight is set to the structural form of a roller 140, and the line segment of the data cable 110 located between the guide wheel 150 and the support part 121 is slidably arranged on the roller 140, and the roller 140 is movably connected to the support bracket 120. When the first terminal 200 moves in the direction close to the second terminal 300, the roller 140 moves downward along the direction of gravity under the action of its own gravity. Since the data cable 110 is slidably arranged on the roller 140, the roller 140 applies a downward pulling force to the data cable 110. As the roller 140 moves downward, the data cable 110 is stretched, thereby preventing the overlapping parts of the data cable 110 from being entangled, knotted, arched, etc.

[0067] like Figures 6 to 8 As shown, in some embodiments, the support bracket 120 is provided with a guide groove 122 extending along the direction of gravity, and the roller 140 is guided and matched with the guide groove 122. By providing the guide groove 122 extending along the direction of gravity on the support bracket, and guiding and matching the roller 140 with the guide groove 122, when the roller 140 moves downward under its own gravity, the guide groove 122 guides the movement of the roller 140, so that the movement of the data cable 110 and the roller 140 is always on the same motion trajectory, which can more reliably ensure that the data cable 110 is not entangled, overlapped, or arched during movement. Specifically, a through groove extending in the vertical direction is provided below the guide wheel 150 and the support portion 121 on the support bracket 120. The guide groove 122 is located between the guide wheel 150 and the support portion 121.

[0068] like Figures 6 to 8 As shown, in one embodiment, the roller 140 includes a guide shaft 141 and a wheel body 142. The guide shaft 141 is slidably disposed within the guide groove 122. The wheel body 142 is rotatably connected to the guide shaft 141. A first limiting groove is provided on the outer circumference of the wheel body 142, and the data cable 110 is slidably disposed within the first limiting groove. In this technical solution, the guide cooperation between the guide shaft 141 and the guide groove 122 ensures the stability of the movement of the roller 140. By rotatably connecting the wheel body 142 to the guide shaft 141, the data cable 110 moves more smoothly under the force of the wheel body 142. By providing the first limiting groove on the wheel body 142 and sliding the data cable 110 within the first limiting groove, the reliable cooperation between the data cable 110 and the roller 140 is ensured, thereby ensuring the reliability of the wheel body 142 in pulling the data cable 110.

[0069] In this embodiment, the guide shaft 141 is a pin, and the wheel body 142 is rotatably connected to one end of the pin via a bearing. The other end of the pin passes through the guide groove 122 on the support bracket 120. The diameter of the pin is smaller than the groove width of the guide groove 122, so that the pin can move freely within the guide groove 122. A bolt is provided at the end of the pin to limit the pin, thereby preventing the pin from disengaging from the guide groove 122. A first limiting groove is provided on the outer circumference of the wheel body 142. The first limiting groove is an annular groove. The groove wall of the first limiting groove is used to limit the data cable 110, thereby preventing the data cable 110 from disengaging from the wheel body 142.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A data cable retracting mechanism for use in a terminal, wherein the terminal comprises a first terminal and a second terminal movable relative to the first terminal, characterized in that: The data line retracting mechanism comprises: a data line, used for communicating with the first terminal and the second terminal; a counterweight, movable relative to the second terminal, the counterweight being disposed on the data cable, the gravity of the counterweight providing tension for the data cable; When the first terminal moves toward the second terminal, the data line is pulled and stretched downward by the gravity of the counterweight; when the first terminal moves away from the second terminal, the counterweight moves upward under the pulling force of the data line.

2. The data cable retracting mechanism according to claim 1, characterized in that: The data line retracting mechanism further includes a support bracket, the support bracket is fixedly connected to the second terminal, a support portion is provided on the support bracket, and the data line is laid on the support portion.

3. The data cable retracting mechanism according to claim 2, wherein: A guide groove is formed on the supporting portion, and a partial line segment of the data line is arranged in the guide groove.

4. The data cable retracting mechanism according to claim 3, characterized in that: The data cable retracting mechanism also includes a guide wheel, which is rotatably connected to the support bracket. The data cable is movably slidably arranged on the guide wheel. The guide wheel is arranged opposite to and spaced from the support part. The counterweight is arranged on the line segment of the data cable between the guide wheel and the support part.

5. The data cable retracting mechanism according to claim 4, characterized in that: The counterweight is configured as a gravity ring, which is sleeved on the data line. When the first terminal moves toward the second terminal, the gravity ring moves along the gravity direction under its own weight.

6. The data cable retracting mechanism according to claim 4, characterized in that: The counterweight is configured as a roller, and the line segment on the data line located between the guide wheel and the support part is slid on the roller. The roller is movably connected to the support bracket. When the first terminal moves toward the second terminal, the roller moves relative to the support bracket along the direction of gravity under the action of its own gravity.

7. The data cable retracting mechanism according to claim 6, characterized in that: The support bracket is provided with a guide slot extending along the direction of gravity, and the roller is guided and matched with the guide slot.

8. The data cable retracting mechanism according to claim 7, characterized in that: The roller comprises: A guide shaft is slidably arranged in the guide groove; The wheel body is rotatably connected to the guide shaft. A first limiting groove is provided on the outer peripheral surface of the wheel body, and the data line is slidably arranged in the first limiting groove.

9. The data cable retracting mechanism according to any one of claims 1 to 8, characterized in that: The data line retracting mechanism further includes: The distributor is fixedly connected to the second terminal, the distributor is communicatively connected to the second terminal, and the data line is communicatively connected to the distributor.

10. A smart blackboard, characterized in that: The smart blackboard includes the data cable retracting mechanism according to any one of claims 1 to 9, and further includes: An electronic display screen, one end of the data line being communicatively connected to the electronic display screen; A memory writing board is slidably connected to the electronic display screen, and the other end of the data line is communicatively connected to the memory writing board.

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