Stand pivot for portable device

Abstract

This utility model relates to a portable device tripod hub, comprising an inner support, which includes an inner connecting part and an internal gear seat, one end of the inner connecting part being connected to the internal gear seat; a shaft passing through the internal gear seat; a sun gear sleeved and fixed to the shaft and located on one side of the internal gear seat; several planetary gears spaced apart on the internal gear seat and meshing with the sun gear; a planetary carrier disposed on the internal gear seat and connecting the shaft, the sun gear, and each planetary gear; and an outer support, which includes an outer connecting part and an outer rotating part, one end of the outer connecting part being connected to the outer rotating part. The outer rotating part is a hollow cylindrical body and forms an internal gear, which is sleeved on each planetary gear and meshes with each planetary gear. Through the design of the planetary gear structure, the inner and outer supports can generate different rotation angles during synchronous rotation, thereby achieving the effect of forming a tripod structure after unfolding, and the overall structural rigidity is sufficient to improve service life.

Description

Technical Field

[0001] This utility model relates to a pivot, and more particularly to a tripod pivot for a portable device with planetary gears. Background Technology

[0002] Currently, common tablet tripods on the market support tablets, mobile phones, or other display devices, allowing users to view or operate them from different angles or heights. Traditional tablet tripods typically employ a folding structure, consisting of a main support and at least one rotatable auxiliary leg. Users can extend or fold the leg using a pivot mechanism to adjust the support angle or storage volume. However, existing tablet tripod technology still has several shortcomings that urgently need improvement.

[0003] Firstly, traditional flatbed tripods require users to operate multiple legs individually when unfolding and folding them, making it impossible to achieve synchronized rotation and unfolding. When users want to quickly unfold or fold the tripod, they often need to adjust the angle of each leg one by one, which is not only cumbersome but also prone to causing the overall structure to tilt or become unstable if the angles of the legs are inconsistent, affecting safety and convenience. Especially in situations requiring rapid setup or angle adjustment, the operational efficiency of this type of tripod is significantly insufficient.

[0004] Furthermore, most existing flat plate tripods use a pivot mechanism as the rotating connection. This pivot usually uses a plastic pin or a simple riveting structure. After repeated opening and closing over a long period of time, the gap is easily increased due to friction and wear, which reduces the stability of the support and may even cause loosening, affecting its service life.

[0005] Furthermore, some existing tripods lack angle locking or synchronous positioning mechanisms in their design, making it difficult for users to maintain symmetrical deployment when adjusting the angle. Repeated fine-tuning is required to achieve balance, which is inconvenient. If used on larger or heavier flatbed devices, structural imbalance can easily lead to the risk of tilting or collapse.

[0006] Therefore, the existing mobile device tripod design still has problems and shortcomings such as asynchronous deployment, poor pivot life, insufficient stability and low ease of operation, which need to be improved. Utility Model Content

[0007] In view of the shortcomings and deficiencies of the prior art, this utility model provides a portable device tripod pivot, which achieves the purpose of two supports rotating synchronously and presenting different angles by setting a planetary gear structure inside the pivot.

[0008] To achieve the above objectives, the technical means adopted by this utility model is to design a tripod pivot for a portable device, which includes: An inner support includes an inner connecting part and an inner tooth seat, one end of the inner connecting part being connected to the inner tooth seat; A shaft, which passes through the internal gear seat; A sun gear, which is sleeved and fixed to the shaft and located on one side of the internal gear seat; Several planetary gears are spaced apart on the internal gear housing and mesh with the sun gear; A planetary carrier is disposed on the internal gear seat and connected to the shaft, the sun gear and each of the planetary gears; An outer support includes an outer connecting part and an outer rotating part. One end of the outer connecting part is connected to the outer rotating part. The outer rotating part is a hollow columnar body and has an internal gear. The outer rotating part is sleeved on each of the planetary gears and the internal gear meshes with each of the planetary gears.

[0009] The advantage of this invention is that, through the design of the planetary gear structure, the inner and outer supports can generate different rotation angles during synchronous rotation, thereby forming a stand structure after unfolding, which is convenient for placing devices such as tablets or mobile phones, and the overall structural rigidity can improve the service life.

[0010] Furthermore, the foot pivot of the portable device further includes a torque device connected to the axis, through which the pivoting torque can be adjusted appropriately.

[0011] Furthermore, the portable device's tripod hub includes a torque device comprising a nut, two washers, and several springs. The two washers and each spring are fitted onto the shaft, with each spring located between the two washers. One end of the shaft has an external thread, and the nut is locked to the external thread of the shaft, clamping the two washers and each spring between the nut and the planetary carrier. The user can appropriately change the number of springs or the tightness of the nut to change the torque value.

[0012] Furthermore, in the portable device's stand hub, the internal gear seat includes a shaft portion and an inner seat portion. The shaft portion is a hollow cylindrical body, and the inner seat portion is a single piece connected to the shaft portion. The inner seat portion is provided with an inner shaft hole and several inner positioning holes. Each of the inner positioning holes is arranged around the inner shaft hole at intervals. The shaft is provided through the inner shaft hole, and one end of each planetary gear is connected to each of the inner positioning holes.

[0013] Furthermore, the portable device's stand hub includes a planetary carrier comprising an outer seat portion and several connecting rods. The outer seat portion is a single piece and has an outer shaft hole and several outer positioning holes. The outer positioning holes are spaced apart and arranged around the outer shaft hole. Each connecting rod protrudes from one side of the outer seat portion. The planetary carrier is fitted onto the shaft through the outer shaft hole. Each connecting rod passes through and is fixed to its corresponding inner positioning hole. The other end of each planetary gear passes through its corresponding outer positioning hole.

[0014] Furthermore, the portable device's tripod hub includes a shaft comprising a connecting section, a limiting section, and a through section. The limiting section is located between the connecting section and the through section and is cylindrical. The through section has two opposing mating surfaces extending axially. The sun gear includes a core and a tooth. The core is cylindrical and has a core hole extending axially through it. The shape of the core hole corresponds to the shape of the through section of the shaft. The tooth is annularly disposed on the outer wall surface of the core.

[0015] Furthermore, in the portable device's tripod hub, the internal gear seat has an inner limiting member protruding from it, and the shaft center has an axle limiting member protruding from it. The inner limiting member can selectively abut against or separate from the axle limiting member. This achieves the function of limiting the rotation angle, allowing the user to easily open it to the optimal angle.

[0016] Furthermore, in the portable device's tripod pivot, the inner limiting member protrudes from one end face of the inner gear seat and has an arc-shaped structure, while the shaft limiting member has a radially protruding arc-shaped structure. The arc-shaped structure helps to increase structural strength and service life. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the closed state of this utility model.

[0018] Figure 2 This is an exploded view of the closed state of this utility model.

[0019] Figure 3 This is an exploded view of the closed state of this utility model from another angle.

[0020] Figure 4 This is a cross-sectional view of the closed state of this utility model.

[0021] Figure 5 This is a schematic diagram showing the closed state of this utility model.

[0022] Figure 6 This is a three-dimensional view of the unfolded state of this utility model.

[0023] Figure 7 This is a cross-sectional view of the unfolded state of this utility model.

[0024] Figure 8 This is a schematic diagram showing the unfolded state of this utility model. Detailed Implementation

[0025] The following, in conjunction with the accompanying drawings and preferred embodiments of the present invention, further illustrates the technical means employed by the present invention to achieve its intended creative purpose.

[0026] Please see Figure 1 and Figure 2 As shown, the tripod hub of the portable device of this utility model includes an inner support 10, a shaft 20, a sun gear 30, several planetary gears 40, a planetary carrier 50, an outer support 60, and a torque device 70.

[0027] Please see Figure 2 and Figure 3 As shown, the inner support 10 includes an inner connecting part 11 and an inner gear seat 12. One end of the inner connecting part 11 is connected to the inner gear seat 12. In this embodiment, the inner connecting part 11 is a single piece and has several inner connecting holes 111 through it. The inner gear seat 12 includes a shaft part 121 and an inner seat part 122. The shaft part 121 is a hollow columnar body, and an inner limiting member 123 is protruding from one end face. The inner limiting member 123 has a protruding arc-shaped structure. The inner seat part 122 is a circular piece and is connected to the other end face of the shaft part 121. The inner seat part 122 has an inner shaft hole 124 and several inner positioning holes 125 through it. Each inner positioning hole 125 is arranged around the inner shaft hole 124 at intervals.

[0028] The shaft 20 includes a connecting section 21, a limiting section 22, and a through section 23. The limiting section 22 is located between the connecting section 21 and the through section 23. The connecting section 21 has several shaft connecting holes 211. The limiting section 22 is cylindrical and has a shaft limiting member 221 protruding from its outer wall. The position and shape of the shaft limiting member 221 correspond to the position and shape of the inner limiting member 123. In this embodiment, the shaft limiting member 221 is a radially protruding arc-shaped structure. The through section 23 is flat. Specifically, the through section 23 has two opposing mating surfaces 231, each mating surface 231 extending in the axial direction. There are two arc surfaces 232 between the two mating surfaces 231, and the two arc surfaces 232 form external threads. The shaft 20 passes through the inner shaft hole 124 of the inner bracket 10. Please refer to [link to relevant documentation]. Figure 6 and Figure 7 As shown, the inner limiting member 123 and the shaft limiting member 221 are located on the same rotational plane. The shaft 20 can rotate relative to the inner support 10 and achieve the effect of limiting the rotation angle and improving the positioning stability through the inner limiting member 123 and the shaft limiting member 221. However, this is not a limitation, and the inner limiting member 123 and the shaft limiting member 221 may not be formed.

[0029] Please see Figures 2 to 4As shown, the sun gear 30 includes a core 31 and a tooth 32. The core 31 is a columnar body and has a core hole 311 extending through it axially. The shape of the core hole 311 corresponds to the shape of the through section 23 of the shaft 20. The tooth 32 is arranged around the outer wall of the core 31. The sun gear 30 is fitted into the through section 23 of the shaft 20 through the core hole 311, thereby allowing the sun gear 30 and the shaft 20 to rotate synchronously.

[0030] Each planetary gear 40 has a rotating rod 41 protruding from both ends. The planetary gear 40 is rotatably inserted through the inner positioning hole 125 of the inner seat 122 via the rotating rod 41 at one end. In this embodiment, there are three planetary gears 40, which are inserted through the inner positioning hole 125 of the inner seat 122 in the form of equal central angles. Each planetary gear 40 meshes with the sun gear 30, but this is not a limitation. The number and form of the planetary gears 40 can be changed according to the user's needs.

[0031] The planetary carrier 50 is disposed on the internal gear seat 12 and connects the shaft 20, the sun gear 30 and each planetary gear 40. In this embodiment, the planetary carrier 50 includes an outer seat portion 51 and several connecting rods 52. The outer seat portion 51 is a circular plate and has an outer shaft hole 511 and several outer positioning holes 512 through it. Each outer positioning hole 512 is arranged around the outer shaft hole 511 at intervals. Each connecting rod 52 protrudes from one side of the outer seat portion 51. The planetary carrier 50 is sleeved on the shaft 20 through the outer shaft hole 511. Each connecting rod 52 is fixed to the corresponding inner positioning hole 125 of the inner support 10. Each planetary gear 40 has a rotating rod 41 at the other end that passes through the corresponding outer positioning hole 512. Thus, the sun gear 30 and the planetary gear 40 are located between the planetary carrier 50 and the inner support 10.

[0032] The outer support 60 includes an outer connecting part 61 and an outer rotating part 62. One end of the outer connecting part 61 is connected to the outer rotating part 62. In this embodiment, the outer rotating part 62 is a hollow cylindrical body and has an internal gear 621 formed therein. The internal gear 621 is circumferentially protruding from the inner wall surface of the outer rotating part 62. The outer connecting part 61 is a long plate body and has several external connecting holes 611 through it. The outer support 60 is sleeved on the planet carrier 50 with the outer rotating part 62. Each planet gear 40 meshes with the internal gear 621. The outer support 60 can rotate synchronously with the planet gear 40. In this embodiment, the ratio of the number of teeth of the sun gear 30, planet gear 40 and internal gear 621 is 2:1:4, but it is not limited thereto.

[0033] The torque device 70 includes a nut 71, two washers 72 and several springs 73. The two washers 72 and each spring 73 are sleeved on the shaft 20 and the springs 73 are located between the two washers 72. The two washers 72 and each spring 73 are clamped between the nut 71 and the planetary carrier 50 by locking the nut 71 to the external thread of the shaft 20. The rotational torque value of this utility model can be changed by adjusting the tightness of the nut 71. However, this is not a limitation. The torque device 70 may not be provided, or the form of the torque device 70 may be changed according to the user's needs.

[0034] When using this utility model, please refer to [link / reference]. Figure 5 and Figure 8 As shown, taking as an example a front leg 80 connected to the connecting section 21 of the axis 20, a middle leg 81 connected to the inner connecting part 11 of the inner support 10, and a rear leg 82 connected to the outer connecting part 61 of the outer support 60, the front leg 80, middle leg 81, and rear leg 82 are plate-like structures; please refer to... Figure 1 , Figure 4 and Figure 5 In a closed state, the inner connecting part 11 and the outer connecting part 61 are on the same side, and the angle between the front tripod 80, the middle tripod 81 and the rear tripod 82 is 0 degrees; please refer to Figures 6 to 8 In an unfolded state, the inner support 10 rotates synchronously by flipping either the middle leg 81 or the rear leg 82. The planetary gear 40, which is connected to the inner support 10, also rotates synchronously. When the middle leg is flipped to an angle of 120 degrees with the front leg 80, the planetary gear 40 drives the inner gear 621 of the outer support 60 to rotate synchronously. Through the change of gear ratio, the rear leg 82, which is connected to the outer support 60, opens synchronously to a state where the angle between it and the front leg 80 is 180 degrees. The aforementioned angle setting can be changed according to the user's needs and is not limited to the above.

[0035] In the aforementioned process, the sun gear 30 is fixed to the shaft 20 and does not rotate, the internal gear 621 is fixed to the outer support 60, and the planet gear 40 is slidably fitted on the planet carrier 50 and allowed to rotate.

[0036] In the aforementioned process, the planetary gear structure design allows the inner support 10 and the outer support 60 to rotate at different angles during synchronous rotation, thereby unfolding to form a stand structure for placing devices such as tablets or mobile phones, and the overall structural rigidity is sufficient to improve service life.

[0037] In the aforementioned process, since the unfolded angle can be limited by the mutual abutment of the inner limiting member 123 and the shaft limiting member 221, it is easy for the user to intuitively unfold to the optimal angle. Because the lever arm generated by the addition of the stand will bear a larger force at the pivot position, the protruding limiting structure can provide stronger stopping strength to improve service life.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Anyone skilled in the art can make some modifications or alterations to the above-disclosed technical content as equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. A tripod pivot for a portable device, characterized in that, Include: An inner support includes an inner connecting part and an inner tooth seat, one end of the inner connecting part being connected to the inner tooth seat; A shaft, which passes through the internal gear seat; A sun gear, which is sleeved and fixed to the shaft and located on one side of the internal gear seat; Several planetary gears are spaced apart on the internal gear housing and mesh with the sun gear; A planetary carrier is disposed on the internal gear seat and connected to the shaft, the sun gear and each of the planetary gears; An outer support includes an outer connecting part and an outer rotating part. One end of the outer connecting part is connected to the outer rotating part. The outer rotating part is a hollow columnar body and has an internal gear. The outer rotating part is sleeved on each of the planetary gears and the internal gear meshes with each of the planetary gears.

2. The tripod pivot of the portable device as described in claim 1, characterized in that, It further includes a torque device connected to the shaft.

3. The tripod pivot of the portable device as described in claim 2, characterized in that, The torque device includes a nut, two washers and several springs. The two washers and each spring are sleeved on the shaft and each spring is located between the two washers. One end of the shaft has an external thread. The nut is locked to the external thread of the shaft and clamps the two washers and each spring between the nut and the planetary carrier.

4. The tripod pivot of the portable device as described in any one of claims 1 to 3, characterized in that, The internal gear seat includes a shaft portion and an inner seat portion. The shaft portion is a hollow cylindrical body, and the inner seat portion is a single piece connected to the shaft portion. The inner seat portion is provided with an inner shaft hole and several inner positioning holes. The inner positioning holes are arranged around the inner shaft hole at intervals. The shaft is provided through the inner shaft hole, and one end of each planetary gear is connected to each of the inner positioning holes.

5. The tripod pivot of the portable device as described in claim 4, characterized in that, The planetary carrier includes an outer seat portion and several connecting rods. The outer seat portion is a single piece and has an outer shaft hole and several outer positioning holes. The outer positioning holes are arranged around the outer shaft hole at intervals. Each connecting rod protrudes from one side of the outer seat portion. The planetary carrier is fitted onto the shaft through the outer shaft hole. Each connecting rod is fixed through its corresponding inner positioning hole, and the other end of each planetary gear passes through its corresponding outer positioning hole.

6. The tripod pivot of the portable device as described in any one of claims 1 to 3, characterized in that, The shaft includes a connecting section, a limiting section, and a through section. The limiting section is located between the connecting section and the through section and is cylindrical. The through section has two opposing mating surfaces that extend in the axial direction. The sun gear includes a core and a tooth. The core is cylindrical and has a core hole extending axially through it. The shape of the core hole corresponds to the shape of the through section of the shaft. The tooth is arranged around the outer wall of the core.

7. The tripod pivot of the portable device as claimed in claim 1, characterized in that, The internal gear seat is provided with an inner limiting member, and the shaft is provided with a shaft limiting member. The inner limiting member can selectively abut against or separate from the shaft limiting member.

8. The tripod pivot of the portable device as described in claim 7, characterized in that, The inner limiting member protrudes from one end face of the inner gear seat and has an arc-shaped structure. The shaft limiting member has a radially protruding arc-shaped structure.

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