Data line expansion device

Abstract

The embodiment of the utility model provides a data line telescopic device, and belongs to the technical field of data lines. The winding device is rotatably mounted on the shell, the data line is arranged on the winding device, the winding device rotates to enable the data line to partially extend out of or retract into the shell, the damper comprises a damping body and a damping rotating shaft, the damping body is fixed to the shell, and the damping rotating shaft is connected with the winding device to rotate along with the winding device. The damping body is used for applying damping force to the damping rotating shaft to limit the rotating speed of the damping rotating shaft. Damping force acts between the damping body and the damping rotating shaft, the part, connected with the winding device, of the damping rotating shaft is not affected by the damping force, the part, connected with the winding device, of the damping rotating shaft and the structure of the winding device can be basically kept unchanged, and the damping force can be greatly reduced under the condition that the structure of the winding device is not changed. And the damper with proper damping force can be selected to obtain the required damping effect, so that the requirements of the installation universality and the damping force of the damper can be well met.

Description

Technical Field

[0001] The present application relates to the technical field of data cables, and in particular to a data cable expansion and contraction device. Background Art

[0002] The data cable retractable device is used to store the data cable. The data cable retractable device is provided with a winding device. The winding device rotates to extend or retract the data cable from the housing of the data cable retractable device.

[0003] In the prior art, a damper is installed on the cable retractor. This damper works with the cable winding device to reduce the cable winding speed, slowing down the cable retraction and preventing it from retracting too quickly and bouncing off. However, it is difficult to achieve both the required installation versatility and the required damping force. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a data cable retracting device that can take into account both the installation versatility and the damping force requirements of the damper.

[0005] The present invention provides a data line expansion and contraction device, comprising:

[0006] shell;

[0007] a wire winding device rotatably mounted on the housing;

[0008] A data cable is disposed on the cable winding device, and the cable winding device rotates so that the data cable can be partially extended or retracted into the housing;

[0009] The damper includes a damping body and a damping shaft, wherein the damping body is fixed to the housing, the damping shaft is connected to the winding device to rotate along with the winding device, and the damping body is used to apply a damping force to the damping shaft to limit the rotation speed of the damping shaft.

[0010] In one embodiment, the damping body has a protruding shaft, and the damping shaft is formed with a mounting hole. The protruding shaft is located in the mounting hole so that there is a damping force between the protruding shaft and the hole wall of the mounting hole to limit the rotation speed of the damping shaft, and the damping shaft rotates around the protruding shaft.

[0011] In one embodiment, the end of the damping shaft axially facing the damping body is the first end, and the end of the damping shaft axially facing the winding device is the second end. Along the axial projection of the damping shaft, the projection area of ​​the second end is located within the projection area of ​​the first end.

[0012] In one embodiment, the damping body and the damping shaft are arranged to form an accommodating cavity, and the accommodating cavity contains damping oil.

[0013] In one embodiment, the damping body includes a sealing ring and a damping cover, the damping cover is fixed to the outer shell, the protruding shaft is formed on the damping cover, the sealing ring is sleeved on the damping shaft, the sealing ring, the damping cover and the damping shaft are arranged to form the accommodating cavity, and the sealing ring is in sealing contact with the damping shaft and the damping cover respectively to inhibit the damping oil from leaking from the accommodating cavity.

[0014] In one embodiment, the wall surface of the damping cover in contact with the sealing ring has a groove, the sealing ring is in sealing contact with at least two groove walls of the groove, and the at least two groove walls are arranged crosswise.

[0015] In one embodiment, the data cable extension device includes a magnetic component, which is arranged on the shell. An adsorption portion is provided at one end of the data cable outside the shell, and the adsorption portion can be magnetically attracted by the magnetic component to fix the data cable.

[0016] In one embodiment, the magnetic member includes a first magnetic member and a second magnetic member, the first magnetic member is installed on the housing, the adsorption portion is magnetically attracted to the first magnetic member, and the second magnetic member is located on a side of the first magnetic member away from the adsorption portion.

[0017] In one embodiment, the data cable retraction device includes a positioning block, which is arranged at one end of the data cable outside the shell. The positioning block is used to abut against the shell to limit the retraction of the data cable. The positioning block is located on the side of the adsorption portion close to the shell.

[0018] In one embodiment, the outer shell includes a limiting portion and a main shell that are interconnected, the limiting portion and the main shell form a working chamber, the damper and the winding device are both arranged on the main shell, the limiting portion is formed with an outlet connected to the working chamber, the data cable can be partially extended or retracted into the working chamber through the outlet, the positioning block can abut against the limiting portion, the first magnetic member is installed on the limiting portion, and the first magnetic member is axially intersected with the outlet.

[0019] The embodiment of the present application provides a data cable retraction device, wherein the winding device rotates to retract the data cable, the damping shaft is connected to the winding device, and there is no relative motion between the winding device and the damping shaft. The damping shaft rotates together with the winding device, and the damping body is fixed to the housing. There is relative motion between the damping shaft and the damping body. The damping body applies a damping force to the damping shaft to limit the rotation speed of the damping shaft, thereby limiting the rotation speed of the winding device, achieving speed limit for data cable retraction, preventing the data cable from retracting too quickly and bouncing to other places, and improving the user experience. There is no relative motion between the damping shaft and the winding device, but there is relative motion between the damping shaft and the damping body. The damping force acts between the damping body and the damping shaft. The damping force is determined by the damper itself, and the assembly between the damper and the winding device will basically not affect the damping force of the damper. When the damping force needs to be increased or decreased during the installation and debugging process, the damper can be replaced as a whole. The parts of the damping shaft of the replaced damper that cooperate with the damping body can be different to obtain different damping forces. The part where the damping shaft is connected to the winding device is not affected by the damping force. The part where the damping shaft is connected to the winding device and the structure of the winding device can remain basically unchanged. Without changing the structure of the winding device, a damper with appropriate damping force can be selected to obtain the required damping effect, thereby better taking into account the installation versatility and damping force requirements of the damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded view of the data cable retractable device according to an embodiment of the present application;

[0021] Figure 2 This is a structural schematic diagram of a data line extension device according to an embodiment of the present application, showing a line outlet;

[0022] Figure 3 This is a schematic structural diagram of a data line extension device according to an embodiment of the present application;

[0023] Figure 4 for Figure 3 Cross-sectional view at AA in the middle;

[0024] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0025] Description of Reference Numerals

[0026] 1. Damper; 11. Damping shaft; 111. Mounting hole; 112. First end; 113. Second end; 12. Damper body; 121. Protruding shaft; 122. Damping cover; 123. Sealing ring; 124. Groove; 125. Groove wall; 13. Accommodating chamber; 2. Winding device; 3. Data cable; 31. Adsorption part; 4. Housing; 41. Limiting part; 42. Main housing; 43. Working chamber; 44. Wire outlet; 5. Magnetic element; 51. First magnetic element; 52. Second magnetic element; 6. Positioning block. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0028] The various specific technical features described in the specific embodiments may be combined in any suitable manner, unless they are inconsistent. For example, different embodiments and technical solutions may be formed by combining different specific technical features. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0029] In the following description, the terms "first, second, ..." are used solely to distinguish different objects and do not imply any similarities or connections between the objects. It should be understood that the directions "above," "below," "outside," and "inside" are intended to represent normal use. The directions "left" and "right" refer to the left-right directions shown in the corresponding schematic diagrams, which may or may not represent normal use.

[0030] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. "A plurality" means greater than or equal to two.

[0031] In the related technology, the damper is fixed on the outer shell, the damping shaft of the damper does not rotate, and the winding device rotates around the damping shaft. The damper mainly applies damping force to the winding device through the damping shaft. The damping force is mainly generated between the damping shaft and the winding device. The magnitude of the damping force is related to the transmission area of ​​the damping force between the damping shaft and the winding device.

[0032] For example, when damping is generated between the damping shaft and the wire winding device through contact friction, the transmission area of ​​the damping force may be the contact area between the damping shaft and the wire winding device.

[0033] For example, when the winding device contains damping oil, the damping shaft extends into the winding device to generate damping on the winding device through the damping oil, and the transmission area of ​​the damping force can be the area of ​​the portion of the damping shaft immersed in the damping oil of the winding device.

[0034] To achieve a greater damping force, the diameter of the damping shaft needs to be increased to increase the damping force transmission area, thereby increasing the damping force. Accordingly, the size of the portion of the winding device where the damping shaft is mounted needs to be increased or modified accordingly. Alternatively, the depth of the damping shaft inserted into the winding device can be increased to increase the damping force transmission area, thereby increasing the damping force. Accordingly, the space on the winding device that accommodates the damping shaft may need to be deepened.

[0035] To achieve a lower damping force, the diameter of the damping shaft needs to be reduced to reduce the area through which the damping force is transmitted, thereby reducing the damping force. Accordingly, the size of the portion of the winding device where the damping shaft is mounted needs to be reduced or modified accordingly. Alternatively, the depth of the damping shaft inserted into the winding device can be reduced to reduce the area through which the damping force is transmitted, thereby reducing the damping force. Accordingly, the space within the winding device to accommodate the damping shaft may need to be reduced.

[0036] During the installation and debugging process, when the damping force between the damper and the winding device is not appropriate and the damping force needs to be increased or decreased, the damping shaft and the winding device of the damper may need to be structurally adjusted accordingly to adapt to the damping force requirements. The installation versatility of dampers with different damping forces is poor, and it is difficult to take into account the installation versatility and damping force requirements of the damper, which makes the installation and debugging of the data telescopic device more troublesome.

[0037] In view of this, the embodiment of the present application provides a data line 3 extension device, please refer to Figures 1 to 5 The data cable 3 retraction device includes a housing 4, a winding device 2, a data cable 3 and a damper 1. The winding device 2 is rotatably mounted on the housing 4. The data cable 3 is arranged on the winding device 2. The winding device 2 rotates so that the data cable 3 can be partially extended or retracted into the housing 4. The damper 1 includes a damping body 12 and a damping shaft 11. The damping body 12 is fixed to the housing 4. The damping shaft 11 is connected to the winding device 2 to rotate with the winding device 2. The damping body 12 is used to apply a damping force to the damping shaft 11 to limit the rotation speed of the damping shaft 11.

[0038] In the embodiment of the present application, the winding device 2 rotates to cause the data cable 3 to extend and retract. The damping shaft 11 is connected to the winding device 2. There is no relative motion between the winding device 2 and the damping shaft 11. The damping shaft 11 rotates together with the winding device 2. The damping body 12 is fixed to the housing 4. There is relative motion between the damping shaft 11 and the damping body 12. The damping body 12 applies a damping force to the damping shaft 11 to limit the rotation speed of the damping shaft 11, thereby limiting the rotation speed of the winding device 2, achieving speed limit for the extension and retraction of the data cable 3, preventing the data cable 3 from extending and retracting too quickly and bouncing to other places, and improving the user experience. There is no relative motion between the damping shaft 11 and the winding device 2. There is relative motion between the damping shaft 11 and the damping body 12. The damping force acts between the damping body 12 and the damping shaft 11. The damping force is determined by the damper 1 itself. The assembly between the damper 1 and the winding device 2 has little effect on the damping force of the damper 1. When the damping force needs to be increased or decreased during the installation and debugging process, the damper 1 can be replaced as a whole. The parts of the damping shaft 11 of the replaced damper 1 that cooperate with the damping body 12 can be different to obtain different damping forces. The part where the damping shaft 11 is connected to the winding device 2 is not affected by the damping force. The part where the damping shaft 11 is connected to the winding device 2 and the structure of the winding device 2 can remain basically unchanged. Without changing the structure of the winding device 2, the required damping effect can be obtained by selecting a damper 1 with appropriate damping force, thereby better taking into account the installation versatility and damping force requirements of the damper 1.

[0039] In one embodiment, please refer to Figure 1 、 Figure 4 and Figure 5 The damping body 12 has a protruding shaft 121, and the damping shaft 11 is formed with a mounting hole 111. The protruding shaft 121 is located in the mounting hole 111 so that there is a damping force between the protruding shaft 121 and the hole wall of the mounting hole 111 to limit the rotation speed of the damping shaft 11, and the damping shaft 11 rotates around the protruding shaft 121.

[0040] In the embodiment of the present application, the protruding shaft 121 of the damping body 12 is located in the mounting hole 111 of the damping shaft 11, which enhances the installation stability of the damping body 12 and the damping shaft 11. The protruding shaft 121 of the damping body 12 is located in the mounting hole 111 of the damping shaft 11, which increases the area in which the damping force can be generated between the damping body 12 and the damping shaft 11, so that there is also a damping force between the protruding shaft 121 of the damping body 12 and the hole wall of the mounting hole 111, thereby enhancing the damping effect.

[0041] It is understood that the damping body 12 is not limited to having the protruding shaft 121, and the damping shaft 11 is not limited to having the mounting hole 111. For example, the damping body 12 is formed with a recessed portion, and the damping shaft 11 has a protruding portion, and the protruding portion of the damping shaft 11 is located in the recessed portion of the damping body 12.

[0042] In one embodiment, please refer to Figure 1 、 Figure 4 and Figure 5 The end of the damping shaft 11 axially facing the damping body 12 is the first end 112, and the end of the damping shaft 11 axially facing the winding device 2 is the second end 113. Along the axial projection of the damping shaft 11, the projection area of ​​the second end 113 is located within the projection area of ​​the first end 112.

[0043] In the embodiment of the present application, along the axial projection of the damping shaft 11, the projection area of ​​the second end 113 is located within the projection area of ​​the first end 112. The axial area of ​​the first end 112 of the damping shaft 11 toward the winding device 2 is larger, which increases the area that can generate damping force between the damping shaft 11 and the damping body 12, thereby improving the damping effect. The axial area of ​​the second end 113 of the damping shaft 11 toward the winding device 2 is smaller, which reduces the impact on the size of the winding device 2 and is beneficial to the assembly of the damping shaft 11 and the winding device 2.

[0044] It is understood that, along the axial projection of the damping shaft 11, the projection area of ​​the second end 113 is not limited to being located within the projection area of ​​the first end 112. For example, along the axial projection of the damping shaft 11, the projection area of ​​the first end 112 is located within the projection area of ​​the second end 113.

[0045] In one embodiment, please refer to Figure 1 、 Figure 4 and Figure 5 The damping body 12 and the damping shaft 11 are surrounded by an accommodating chamber 13 , and the accommodating chamber 13 contains damping oil.

[0046] Damping oil is a new type of high-quality wide-temperature lubricant used for damping, buffering and sealing, which is made of high-purity inorganic thickener and special synthetic oil.

[0047] It should be noted that the space of the accommodating cavity 13 includes the gap between the hole wall of the mounting hole 111 and the protruding shaft 121, but is not limited thereto.

[0048] In the embodiment of the present application, the damping body 12 and the damping shaft 11 are surrounded by a receiving chamber 13 , and the receiving chamber 13 contains a large amount of damping oil, which can improve the damping effect between the damping body 12 and the damping shaft 11 .

[0049] It is understandable that damping oil may not be provided between the damping body 12 and the damping shaft 11 .

[0050] Exemplarily, the damping oil may be disposed only in the mounting hole 111 of the damping shaft 11 .

[0051] In one embodiment, please refer to Figure 1 、 Figure 4 and Figure 5 The damping body 12 includes a sealing ring 123 and a damping cover 122. The damping cover 122 is fixed to the housing 4. The protruding shaft 121 is formed on the damping cover 122. The sealing ring 123 is sleeved on the damping rotating shaft 11. The sealing ring 123, the damping cover 122 and the damping rotating shaft 11 are surrounded by an accommodating cavity 13. The sealing ring 123 is in sealing contact with the damping rotating shaft 11 and the damping cover 122 respectively to inhibit leakage of the damping oil from the accommodating cavity 13.

[0052] In the embodiment of the present application, the sealing ring 123 is in sealing contact with the damping shaft 11 and the damping cover 122 respectively, so that the accommodating chamber 13 becomes a sealed space, inhibiting the leakage of the damping oil from the accommodating chamber 13, preventing the damping oil from affecting the winding device 2 and the data cable 3, reducing the possibility of damage to the telescopic device of the data cable 3, reducing the loss of the damping oil, and maintaining the damping effect of the damping oil.

[0053] It is understood that the sealing ring 123 is not limited to being in sealing contact with the damping shaft 11 and the damping cover 122. For example, there is a gap between the sealing ring 123 and the damping shaft 11, and there is a gap between the sealing ring 123 and the damping cover 122.

[0054] In one embodiment, please refer to Figure 4 and Figure 5 The wall surface of the damping cover 122 in contact with the sealing ring 123 has a groove 124 , and the sealing ring 123 is in sealing contact with at least two groove walls 125 of the groove 124 , and the at least two groove walls 125 are arranged crosswise.

[0055] In an embodiment of the present application, the wall surface where the damping cover 122 contacts the sealing ring 123 has a groove 124, and the sealing ring 123 is in sealing contact with at least two groove walls 125 of the groove 124. The at least two groove walls 125 are arranged crosswise. The groove walls 125 of the groove 124 can increase the sealing area between the sealing ring 123 and the damping cover 122. At least two groove walls 125 in different directions are in sealing contact with the sealing ring 123 to form a sealing surface. The contact surface between the damping cover 122 and the sealing ring 123 is sealed from two different directions, thereby improving the sealing effect of the accommodating cavity 13.

[0056] It is understood that the wall surface where the damping cover 122 contacts the sealing ring 123 is not limited to having the groove 124. Exemplarily, the wall surface where the damping cover 122 contacts the sealing ring 123 is a plane.

[0057] In one embodiment, please refer to Figures 1 to 5 The data line 3 retraction device includes a magnetic component 5, which is arranged on the shell 4. An adsorption portion 31 is provided at one end of the data line 3 outside the shell 4. The adsorption portion 31 can be magnetically attracted by the magnetic component 5 to fix the data line 3.

[0058] The magnetic component 5 is a component that can generate a magnetic field. The magnetic component 5 can generate magnetic attraction with the ferromagnetic material or between the magnetic component 5 .

[0059] Exemplarily, the magnetic attraction member 5 may be a magnet, a permanent magnet or an electromagnet.

[0060] Exemplarily, the adsorption portion 31 of the data line 3 is made of ferromagnetic material, for example, the adsorption portion 31 of the data line 3 is made of iron.

[0061] Exemplarily, the adsorption portion 31 of the data line 3 can generate a magnetic field. For example, the adsorption portion 31 of the data line 3 is made of a magnetic material.

[0062] In the embodiment of the present application, a magnetic component 5 is provided on the shell 4, and an adsorption portion 31 is provided at one end of the data cable 3 located outside the shell 4. A magnetic attraction force can be generated between the magnetic component 5 and the adsorption portion 31, magnetically fixing the adsorption portion 31 of the data cable 3, so that the end of the data cable 3 located outside the shell 4 can be fixed on the shell 4, so that the data cable 3 is neatly placed on the data cable 3 retractable device.

[0063] It is understandable that the data cable 3 expansion and contraction device is not limited to the magnetic element 5. For example, the data cable 3 expansion and contraction device is not provided with the magnetic element 5, and the end of the data cable 3 outside the housing 4 is not fixed.

[0064] In one embodiment, please refer to Figures 1 to 5 The magnetic component 5 includes a first magnetic component 51 and a second magnetic component 52. The first magnetic component 51 is installed on the housing 4. The adsorption portion 31 is magnetically attracted to the first magnetic component 51. The second magnetic component 52 is located on the side of the first magnetic component 51 away from the adsorption portion 31.

[0065] It should be noted that, when projected along the arrangement direction of the adsorption portion 31 and the first magnetic member 51 , the projection area of ​​the adsorption portion 31 , the projection area of ​​the first magnetic member 51 , and the projection area of ​​the second magnetic member 52 at least partially overlap.

[0066] In the embodiment of the present application, the first magnetic component 51 is installed on the shell 4, the adsorption part 31 is magnetically fixed to the first magnetic component, and the second magnetic component 52 is located on the side of the first magnetic component 51 away from the adsorption part 31. The second magnetic component 52 can also generate a magnetic force between the adsorption part 31. The second magnetic component 52 is fixed to the first magnetic component 51 by the magnetic force. The second magnetic component 52 does not need to be installed with the shell 4. While reducing the weight of the second magnetic component 52, the stability of the magnetic fixation of the adsorption part 31 is enhanced.

[0067] It is understandable that the magnetic member 5 is not limited to include the first magnetic member 51 and the second magnetic member 52. For example, the magnetic member 5 only includes the first magnetic member 51.

[0068] In one embodiment, please refer to Figures 1 to 5The data line 3 retraction device includes a positioning block 6, which is arranged at one end of the data line 3 outside the shell 4. The positioning block 6 is used to abut against the shell 4 to limit the retraction of the data line 3. The positioning block 6 is located on the side of the adsorption portion 31 close to the shell 4.

[0069] In the embodiment of the present application, the positioning block 6 is located on the side of the adsorption portion 31 close to the shell 4. The positioning block 6 will not affect the magnetic fixation of the adsorption portion 31. The positioning block 6 is set at the end of the data cable 3 outside the shell 4. The data cable 3 is used to abut against the shell 4 to limit the retraction of the data cable 3, so that the data cable 3 will not be completely retracted into the shell 4, making the data cable 3 retractable device easy to use.

[0070] It is understandable that the data line 3 expansion and contraction device is not limited to being provided with the positioning block 6. Exemplarily, the data line 3 expansion and contraction device is not provided with the positioning block 6.

[0071] In one embodiment, please refer to Figures 1 to 5 The outer shell 4 includes a limiting portion 41 and a main shell 42 connected to each other. The limiting portion 41 and the main shell 42 enclose a working chamber 43. The damper 1 and the winding device 2 are both arranged in the main shell 42. The limiting portion 41 is formed with an outlet 44 connected to the working chamber 43. The data cable 3 can be partially extended or retracted into the working chamber 43 through the outlet 44. The positioning block 6 can abut against the limiting portion 41. The first magnetic member 51 is installed on the limiting portion 41, and the extension direction of the first magnetic member 51 is intersecting with the axial direction of the outlet 44.

[0072] It should be noted that the distance between the positioning block 6 and the adsorption portion 31 is small. After the positioning block 6 abuts against the limiting portion 41, the adsorption portion 31 is located within the magnetic field range of the first magnetic component 51, so that the adsorption portion 31 can be magnetically fixed by the first magnetic component 51.

[0073] In the embodiment of the present application, the first magnetic component 51 is installed on the limiting portion 41, and the extension direction of the first magnetic component 51 intersects with the axial direction of the outlet 44. When the positioning block 6 abuts against the limiting portion 41, the data cable 3 stops shrinking, and the first magnetic component 51 can automatically magnetically fix the adsorption portion 31 of the data cable 3. There is no need to manually adjust the position of the data cable 3, and the data cable 3 retraction device is easy to use.

[0074] It is understandable that the first magnetic member 51 is not limited to being installed on the limiting portion 41. For example, the first magnetic member 51 is installed on the main housing 42.

[0075] In the description of this application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine different embodiments or examples described in this application and features of different embodiments or examples without contradiction.

[0076] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A data line expansion device, characterized in that: include: shell; a wire winding device rotatably mounted on the housing; A data cable is disposed on the cable winding device, and the cable winding device rotates so that the data cable can be partially extended or retracted into the housing; The damper includes a damping body and a damping shaft, wherein the damping body is fixed to the housing, the damping shaft is connected to the winding device to rotate along with the winding device, and the damping body is used to apply a damping force to the damping shaft to limit the rotation speed of the damping shaft.

2. The data line expansion device according to claim 1, characterized in that: The damping body has a protruding shaft, and the damping shaft is formed with a mounting hole. The protruding shaft is located in the mounting hole so that there is a damping force between the protruding shaft and the hole wall of the mounting hole to limit the rotation speed of the damping shaft. The damping shaft rotates around the protruding shaft.

3. The data line expansion device according to claim 2, characterized in that: The end of the damping shaft axially facing the damping body is the first end, and the end of the damping shaft axially facing the winding device is the second end. Along the axial projection of the damping shaft, the projection area of ​​the second end is located within the projection area of ​​the first end.

4. The data line expansion device according to claim 2, characterized in that: The damping body and the damping rotating shaft are arranged to form an accommodating cavity, and the accommodating cavity contains damping oil.

5. The data line expansion device according to claim 4, characterized in that: The damping body includes a sealing ring and a damping cover, the damping cover is fixed to the outer shell, the protruding shaft is formed on the damping cover, the sealing ring is sleeved on the damping rotating shaft, the sealing ring, the damping cover and the damping rotating shaft are arranged to form the accommodating cavity, and the sealing ring is in sealing contact with the damping rotating shaft and the damping cover respectively to inhibit the damping oil from leaking from the accommodating cavity.

6. The data line expansion device according to claim 5, characterized in that: The wall surface of the damping cover in contact with the sealing ring has a groove, the sealing ring is in sealing contact with at least two groove walls of the groove, and the at least two groove walls are arranged crosswise.

7. The data line extension device according to any one of claims 1 to 6, characterized in that: The data line retraction device includes a magnetic component, which is arranged on the shell. One end of the data line outside the shell is provided with an adsorption portion, which can be magnetically attracted by the magnetic component to fix the data line.

8. The data line expansion device according to claim 7, characterized in that: The magnetic member includes a first magnetic member and a second magnetic member. The first magnetic member is installed on the housing. The adsorption portion is magnetically attracted to the first magnetic member. The second magnetic member is located on a side of the first magnetic member away from the adsorption portion.

9. The data line expansion device according to claim 8, characterized in that: The data line retraction device includes a positioning block, which is arranged at one end of the data line outside the shell. The positioning block is used to abut against the shell to limit the retraction of the data line. The positioning block is located on the side of the adsorption part close to the shell.

10. The data line expansion device according to claim 9, characterized in that: The outer shell includes a limiting portion and a main shell that are interconnected. The limiting portion and the main shell form a working chamber. The damper and the winding device are both arranged on the main shell. The limiting portion is formed with an outlet connected to the working chamber. The data cable can partially extend or retract into the working chamber through the outlet. The positioning block can abut against the limiting portion. The first magnetic component is installed on the limiting portion, and the first magnetic component intersects with the axial direction of the outlet.

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