Hinge for portable smart device holder

Abstract

The present disclosure provides a hinge for a portable smart device support, comprising a lower connecting plate, an upper connecting plate, a first shaft, a second shaft, a fixing seat and a limiting block, the lower connecting plate is hinged with the first shaft, the upper connecting plate is hinged with the second shaft, the fixing seat is fixedly connected with the first shaft and the second shaft in the circumferential direction respectively, the fixing seat is provided with a first stopper capable of cooperating with the lower connecting plate and the upper connecting plate respectively, the limiting block is fixedly connected with the first shaft and the second shaft in the circumferential direction respectively, the first shaft and the second shaft are respectively provided with a cam assembly providing friction torque for rotation, and the upper connecting plate can be opened and closed relative to the lower connecting plate. The present disclosure is convenient to operate, the structure of double shafts can disperse the stress of the shafts, reduce the wear of the shafts, etc., the first stopper and the limiting block can realize sequential actions of opening and closing, reduce the force acting on the shafts and the cam, etc., and can better meet the needs, experience, etc. of users.

Description

Technical Field

[0001] This disclosure relates to portable smart devices, and more particularly to a hinge for a portable smart device holder. Background Technology

[0002] With the rapid development of technology and the continuous progress of society, lightweight and portable smart devices such as laptops, tablets, personal digital assistants (PDAs), smartphones, e-readers, learning machines, and game consoles are increasingly popular among consumers and have become indispensable tools in people's work and life. Currently, many of these portable smart devices are equipped with corresponding stands, such as the Magic Keyboard, to provide stable support, ease of use, improved work efficiency, and protection against scratches or collisions. These stands open to support the portable smart device during use and close to protect it when carried. To better meet user needs and enhance the user experience, the requirements for stands are becoming increasingly stringent. However, existing portable smart device stands typically use a single pivot for rotation, which is prone to wear and tear, reducing their lifespan. Furthermore, the opening angle of the stands cannot be effectively limited, making them inconvenient to use and failing to meet the increasingly demanding needs and user experience. Summary of the Invention

[0003] The purpose of this disclosure is to provide a hinge for a portable smart device holder, which can solve at least one of the above-mentioned technical problems. The technical solution of this disclosure is as follows:

[0004] A hinge for a portable smart device holder includes a lower connecting plate, an upper connecting plate, a first shaft, a second shaft, a fixed base, and a limiting block. The lower connecting plate is hinged to the first shaft, and the upper connecting plate is hinged to the second shaft. The fixed base is circumferentially fixedly connected to both the first and second shafts. The fixed base is provided with a first stop that can cooperate with the lower and upper connecting plates respectively. The limiting block is circumferentially fixedly connected to both the first and second shafts. Cam assemblies that provide frictional torque for their rotation are respectively provided on the first and second shafts. The upper connecting plate can open and close relative to the lower connecting plate. During the process of rotating outward from the closed position to the first opening angle, the first shaft rotates outward synchronously. The first stop cooperates with the upper connecting plate to prevent the second shaft from rotating relative to the upper connecting plate. When the upper connecting plate rotates to the first opening angle, the limiting block can restrict the first shaft from continuing to rotate outward. During the process of rotating outward from the first opening angle to the maximum opening angle, the first stop cooperates with the lower connecting plate to prevent the lower connecting plate from rotating relative to the first shaft, while the upper connecting plate rotates relative to the second shaft. When the upper connecting plate rotates to the maximum opening angle, the limiting block can restrict the upper connecting plate from continuing to rotate outward.

[0005] In some embodiments, a first limiting part is provided on the lower connecting plate, a second limiting part is provided on the upper connecting plate, and a third limiting part is provided on the limiting block, which can cooperate with the first limiting part and the second limiting part respectively.

[0006] In some embodiments, the lower connecting plate is provided with a first groove that cooperates with the first stop, the upper connecting plate is provided with a second groove that cooperates with the first stop, and the fixed base is provided with a first sliding groove that cooperates with the first stop. During the process of the upper connecting plate rotating outward from the closed position to the first opening angle, the first stop disengages from the first sliding groove, and the first stop cooperates with the second groove to stop the upper connecting plate. During the process of the upper connecting plate rotating outward from the first opening angle to the maximum opening angle, the first stop disengages from the second groove along the first sliding groove, and the first stop cooperates with the first groove to stop the lower connecting plate.

[0007] In some embodiments, the first shaft is provided with a first flat part, the fixed seat is provided with a first connecting hole connected to the first shaft, the limiting block is provided with a second connecting hole connected to the first shaft, the first connecting hole is provided with a second flat part that mates with the first flat part, and the second connecting hole is provided with a third flat part that mates with the first flat part.

[0008] In some embodiments, one end of the fixed base presses against the lower connecting plate and the upper connecting plate respectively, and a first retaining ring is provided on the first shaft and the second shaft respectively to cooperate with the other end of the fixed base.

[0009] In some embodiments, the cam assembly includes a first cam and a first elastic element. A second cam that cooperates with the first cam is provided on the lower connecting plate. The first elastic element enables the first cam and the second cam to elastically cooperate. One end of the first elastic element presses against the first cam. A first nut that cooperates with the other end of the first elastic element is provided on the first shaft.

[0010] In some embodiments, the first elastic element is a disc spring sleeved on the first shaft.

[0011] In some embodiments, a first torsion spring is sleeved on the first shaft and a second torsion spring is sleeved on the second shaft. During the process of the upper connecting plate rotating outward from the closed position to the first opening angle, the torque generated by the first torsion spring gradually decreases. During the process of the upper connecting plate rotating outward from the first opening angle to the maximum opening angle, the torque generated by the second torsion spring gradually decreases.

[0012] In some embodiments, the lower connecting plate is provided with a third groove for connecting to the pins of the first torsion spring, and the lower connecting plate is provided with a fourth groove for connecting to the pins of the second torsion spring.

[0013] In some embodiments, a pin at one end of the first torsion spring is fixedly connected to a pin at one end of the second torsion spring, a pin at the other end of the first torsion spring is fixedly connected to a third groove, and a pin at the other end of the second torsion spring is fixedly connected to a fourth groove.

[0014] The beneficial effects of this disclosure are: when the upper connecting plate opens relative to the lower connecting plate, during the process of the upper connecting plate rotating outward from the closed position to the first opening angle, the first shaft rotates outward synchronously, that is, the fixed seat, the limiting block, the second shaft and the upper connecting plate move together with the rotation of the first shaft. Since the first stop is engaged with the upper connecting plate, the first stop stops the upper connecting plate, so that the second shaft and the upper connecting plate will not rotate relative to each other.

[0015] When the upper connecting plate rotates to the first opening angle, the limiting block cooperates with the lower connecting plate, thereby restricting the first shaft from continuing to rotate outward;

[0016] During the process of the upper connecting plate rotating outward from the first opening angle to the maximum opening angle, the first stop releases its stop on the upper connecting plate. The first stop cooperates with the lower connecting plate, and the first stop stops the lower connecting plate so that the lower connecting plate and the first shaft will not rotate relative to each other. As a result, the upper connecting plate rotates relative to the second shaft, allowing the upper connecting plate to continue to open outward.

[0017] When the upper connecting plate rotates to the maximum opening angle, the limiting block cooperates with the lower connecting plate to restrict the upper connecting plate from continuing to rotate outward, that is, to limit the maximum opening angle of the upper connecting plate.

[0018] Similarly, the upper connecting plate can close relative to the lower connecting plate as needed, making operation convenient, with a compact and stable structure. The dual-axis structure can distribute the force on the shaft and reduce wear on the shaft. Furthermore, the first stop and limit block can realize the sequential action of opening and closing, reduce the force on the shaft and cam, simplify the part structure, make processing and manufacturing simpler, and ensure high stability and reliability. It can ensure better opening and closing, better meet the needs and experience of users, and is more suitable for use in portable smart device stands such as tablets and smartphones, such as Magic Keyboard for tablets, enhancing the product's competitiveness and expanding its application and development.

[0019] Furthermore, unless otherwise specified in this disclosure, all technical solutions can be implemented using conventional methods in the field. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 An exploded view of a hinge for a portable smart device holder according to one embodiment of this disclosure.

[0022] Figure 2 This is a schematic diagram of the structure of the lower connecting plate according to one embodiment of the present disclosure.

[0023] Figure 3 This is a schematic diagram of the upper connecting plate according to one embodiment of the present disclosure.

[0024] Figure 4 This is a schematic diagram of the structure of the first shaft according to one embodiment of the present disclosure.

[0025] Figure 5 This is a schematic diagram of the structure of a first torsion spring and a second torsion spring according to one embodiment of the present disclosure.

[0026] Figure 6 This is a schematic diagram of the structure of a fixing base according to one embodiment of the present disclosure.

[0027] Figure 7 This is a schematic diagram of the structure of a limiting block according to one embodiment of the present disclosure.

[0028] Figure 8 This is a schematic diagram of the hinge closed state of a portable smart device holder according to one embodiment of the present disclosure.

[0029] Figure 9 This is a cross-sectional view of the hinge closed state of a portable smart device holder according to one embodiment of the present disclosure.

[0030] Figure 10 This is a structural schematic diagram of the first opening angle state of the hinge of a portable smart device holder according to one embodiment of the present disclosure.

[0031] Figure 11 This is a cross-sectional view of the hinge of a portable smart device holder in a first opening angle state according to one embodiment of the present disclosure.

[0032] Figure 12 This is a partial cross-sectional view of a hinge for a portable smart device holder in a first opening angle state, according to one embodiment of this disclosure.

[0033] Figure 13 This is a structural schematic diagram of the hinge of a portable smart device holder in the maximum opening angle state according to one embodiment of the present disclosure.

[0034] Figure 14 This is a cross-sectional view of the hinge of a portable smart device holder in the maximum opening angle state according to one embodiment of the present disclosure.

[0035] Figure 15 This is a partial cross-sectional view of the hinge of a portable smart device holder in the maximum opening angle state according to one embodiment of this disclosure.

[0036] Figure 16 This is a schematic diagram of the first torsion spring and the second torsion spring in their closed states according to one embodiment of this disclosure.

[0037] Figure 17 This is a structural schematic diagram of the first torsion spring and the second torsion spring in the first opening angle state according to one embodiment of the present disclosure.

[0038] Figure 18 This is a schematic diagram of the structure of the first torsion spring and the second torsion spring at their maximum opening angle, according to one embodiment of this disclosure.

[0039] The reference numerals in the attached diagram are as follows: Lower connecting plate 1, First limiting part 11, First groove 12, Third groove 13, Second cam 14, First connecting post 15, Upper connecting plate 2, Second limiting part 21, Second groove 22, Fourth groove 23, Third cam 24, Second connecting post 25, First shaft 3, First flat part 31, First nut 32, First torsion spring 33, First flange 34, Second shaft 4, Second torsion spring 41, Fixing seat 5, First stop 51, First slide groove 52, First connecting hole 53, Second flat part 54, Limiting block 6, Third limiting part 61, Second connecting hole 62, Third flat part 63, Cam assembly 7, First cam 71, First elastic element 72, Fourth cam 73, First retaining ring 8. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only some, not all, of the embodiments of this disclosure, and are used merely to explain this disclosure and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0041] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "both ends," "both sides," "bottom," and "top," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first," "second," "upper-level," "lower-level," "primary," and "secondary," etc., are used for descriptive purposes only and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.

[0042] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0043] See Figures 1-18 The diagram schematically illustrates a hinge for a portable smart device holder according to the present disclosure, comprising a lower connecting plate 1, an upper connecting plate 2, a first shaft 3, a second shaft 4, a fixing base 5, and a limiting block 6. The upper connecting plate 2 is capable of opening and closing relative to the lower connecting plate 1. The lower connecting plate 1 is hinged to the first shaft 3, meaning the lower connecting plate 1 and the first shaft 3 can rotate relative to each other. The upper connecting plate 2 is hinged to the second shaft 4, meaning the upper connecting plate 2 and the second shaft 4 can rotate relative to each other. The fixing base 5 is circumferentially fixedly connected to both the first shaft 3 and the second shaft 4, meaning the fixing base 5 cannot rotate relative to the first shaft 3. The limiting block 6 is circumferentially fixedly connected to both the first shaft 3 and the second shaft 4, meaning the limiting block 6 cannot rotate relative to either the first shaft 3 or the second shaft 4.

[0044] The fixed base 5 is provided with a first stop 51 that can cooperate with the lower connecting plate 1 and the upper connecting plate 2 respectively. When the first stop 51 cooperates with the upper connecting plate 2, the first stop 51 can stop the upper connecting plate 2, so that the second shaft 4 and the upper connecting plate 2 do not rotate relative to each other. When the first stop 51 cooperates with the lower connecting plate 1, the first stop 51 can stop the lower connecting plate 1, so that the second shaft 4 and the lower connecting plate 1 do not rotate relative to each other.

[0045] Cam assemblies 7 are respectively provided on the first shaft 3 and the second shaft 4 to provide frictional torque for their rotation. One of the cam assemblies 7 can provide frictional torque for the relative rotation of the lower connecting plate 1 and the first shaft 3, and the other cam assembly 7 can provide frictional torque for the relative rotation of the upper connecting plate 2 and the second shaft 4.

[0046] During use, the lower connecting plate 1 is used to connect with the first main body, such as a base or keyboard base. The upper connecting plate 2 is used to connect with the second main body, such as a tablet computer or a support plate for placing a portable smart device. When the upper connecting plate 2 opens relative to the lower connecting plate 1, as the upper connecting plate 2 rotates outward from its closed position to the first opening angle, the first shaft 3 rotates outward synchronously. Because the first stop 51 cooperates with the upper connecting plate 2, the first stop 51 stops the upper connecting plate 2, preventing the second shaft 4 from rotating relative to the upper connecting plate 2. Therefore, the fixed base 5, the limiting block 6, the second shaft 4, and the upper connecting plate 2 move together with the rotation of the first shaft 3.

[0047] When the upper connecting plate 2 rotates to the first opening angle, the limiting block 6 cooperates with the lower connecting plate, so that the limiting block 6 cannot continue to rotate outward, thereby restricting the first shaft 3 from continuing to rotate outward, and the fixed seat 5 cannot continue to rotate outward. The first opening angle can be 30° or other suitable angles.

[0048] During the process of the upper connecting plate 2 rotating outward from the first opening angle to the maximum opening angle, the first stop 51 releases its stop on the upper connecting plate 2. The first stop 51 cooperates with the lower connecting plate 1 and stops the lower connecting plate 1, so that the lower connecting plate 1 and the first shaft 3 will not rotate relative to each other. As a result, the upper connecting plate 2 and the second shaft 4 rotate relative to each other, so that the upper connecting plate 2 continues to open outward. The maximum opening angle can be 80° or other suitable angles.

[0049] When the upper connecting plate 2 rotates to the maximum opening angle, the limiting block 6 cooperates with the lower connecting plate to restrict the upper connecting plate 2 from continuing to rotate outward, that is, to limit the maximum opening angle of the upper connecting plate 2.

[0050] Similarly, when the upper connecting plate 2 closes relative to the lower connecting plate 1, as the upper connecting plate 2 rotates inward from its maximum opening angle to its first opening angle, the first stop 51 stops the lower connecting plate 1, preventing relative rotation between the lower connecting plate 1 and the first shaft 3. The upper connecting plate 2 rotates relative to the second shaft 4, causing the upper connecting plate 2 to continue rotating inward to close. As the upper connecting plate 2 rotates inward from its first opening angle to its closing position, the first stop 51 stops the upper connecting plate 2, preventing relative rotation between the second shaft 4 and the upper connecting plate 2. The first shaft 3 rotates inward synchronously until the upper connecting plate 2 covers the lower connecting plate 1, thus achieving the sequential action of opening and closing.

[0051] The lower connecting plate 1 is provided with a first limiting part 11, the upper connecting plate 2 is provided with a second limiting part 21, and the limiting block 6 is provided with a third limiting part 61 that can cooperate with the first limiting part 11 and the second limiting part 21 respectively. When the upper connecting plate 2 rotates to the first opening angle, see... Figure 12 As shown, the third limiting part 61 contacts the first limiting part 11, preventing the limiting block 6 from rotating outward, thereby restricting the first shaft 3 from rotating outward. When the upper connecting plate 2 rotates to the maximum opening angle, see... Figure 15 As shown, the second limiting part 21 and the third limiting part 61 restrict the upper connecting plate 2 from continuing to rotate outward, which can ensure better opening and closing, and is more stable and reliable.

[0052] The lower connecting plate 1 has a first groove 12 that mates with the first stop 51, the upper connecting plate 2 has a second groove 22 that mates with the first stop 51, and the fixing seat 5 has a first sliding groove 52 that mates with the first stop 51. The first stop 51 can be a stop pin or the like. The first stop 51 slides along the first sliding groove 52, allowing it to mate with both the lower connecting plate 1 and the upper connecting plate 2 as needed. See also Figure 9 , Figure 11 As shown, during the process of the upper connecting plate 2 rotating outward from a closed position to a first open angle, the first stop 51 disengages from the first slide groove 52, and the first stop 51 engages with the second groove 22. The first stop 51 stops the upper connecting plate 2, preventing relative rotation between the second shaft 4 and the upper connecting plate 2. (See Figure 1) Figure 9 , Figure 11 As shown, during the process of the upper connecting plate 2 rotating outward from the first opening angle to the maximum opening angle, the first stop 51 disengages from the second groove 22 along the first slide groove 52, and the first stop 51 cooperates with the first groove 12. The first stop 51 stops the lower connecting plate 1, so that the first shaft 3 and the lower connecting plate 1 will not rotate relative to each other, which can ensure better opening and closing, and is more stable and reliable.

[0053] The first shaft 3 and the second shaft 4 have basically the same structure. Here, we take the first shaft 3 as an example, and the second shaft 4 refers to the structure of the first shaft 3. The first shaft 3 has a first flat part 31 on its upper surface. The fixing seat 5 has a first connecting hole 53 that connects to the first shaft 3. The limiting block 6 has a second connecting hole 62 that connects to the first shaft 3. A second flat part 54 that mates with the first flat part 31 is provided inside the first connecting hole 53, and a third flat part 63 that mates with the first flat part 31 is provided inside the second connecting hole 62. This ensures that the fixing seat 5 is fixed circumferentially to the first shaft 3, and the limiting block 6 is fixedly connected circumferentially to the first shaft 3. The structure is simple and stable. The first shaft 3 can have one, two, or more flat parts, and the second flat part 54 and the third flat part 63 correspond one-to-one with the first flat part 31.

[0054] One end of the fixed base 5 presses against the lower connecting plate 1 and the upper connecting plate 2 respectively. The first shaft 3 and the second shaft 4 are respectively provided with first retaining springs 8 that mate with the other end of the fixed base 5. The first shaft 3 and the second shaft 4 are respectively provided with retaining grooves that mate with the first retaining springs 8. Each first retaining spring 8 may have two retaining rings, with the two retaining rings connecting to the first shaft 3 and the second shaft 4 respectively, resulting in a more stable structure and easier operation. The first retaining spring 8 can also be an elastic retaining ring, etc.

[0055] The cam assembly 7 includes a first cam 71 and a first elastic element 72. A second cam 14 that cooperates with the first cam 71 is provided on the lower connecting plate 1. The first elastic element 72 enables the first cam 71 and the second cam 14 to elastically engage. One end of the first elastic element 72 presses against the first cam 71. A first nut 32 that cooperates with the other end of the first elastic element 72 is provided on the first shaft 3. A washer or similar material can also be provided between the first nut 32 and the first elastic element 72. Typically, the first nut 32 is located at one end of the first shaft 3, and a first flange 34 is provided at the other end of the first shaft 3, thereby limiting both ends of the first shaft 3. Similarly, the cam assembly 7 includes a fourth cam 73 and a second elastic element that cooperates with the fourth cam 73. A third cam 24 that cooperates with the fourth cam 73 is provided on the upper connecting plate 2. During the process of the upper connecting plate 2 rotating outward from the closed position to the first opening angle, the cam surface of the first cam 71 rotates to the top of the slope of the cam surface of the second cam 14. During the process of the upper connecting plate 2 rotating outward from the first opening angle to the maximum opening angle, the cam surface of the third cam 24 rotates from the top of the slope of the cam surface of the fourth cam 73 until the third limiting part 61 contacts the second limiting part 21 and stops. The closing process is the opposite, thereby ensuring the continuity of the torque generated by the cam during the opening and closing process.

[0056] The first elastic element 72 is a disc spring sleeved on the first shaft 3. There can be one disc spring or multiple disc springs stacked together. Disc springs have advantages such as high load capacity, short stroke, small space requirement, convenient combination and use, and easy maintenance and replacement, making operation more convenient. In addition, the first elastic element 72 can also be a compression spring or other suitable elastic element.

[0057] A first torsion spring 33 is fitted onto the first shaft 3, and a second torsion spring 41 is fitted onto the second shaft 4. During the rotation of the upper connecting plate 2 from closed to open angle, the first torsion spring 33 is twisted, and the torque generated by the first torsion spring 33 gradually decreases. During the rotation of the upper connecting plate 2 from open angle to maximum open angle, the second torsion spring 41 is twisted, and the torque generated by the second torsion spring 41 gradually decreases. Thus, during opening and closing, the connection between the cam assembly 7 and the first and second torsion springs 33 and 41 ensures the continuity of torque changes throughout the process, resulting in a more continuous feel. In particular, the torsion springs balance the torque changes caused by gravity during the opening of the smart device; that is, when opening, the torsion spring torque gradually decreases, making the opening process easier, while when closing, the torsion spring torque gradually increases, supporting the smart device's descent during closing. Furthermore, during the rotation of the upper connecting plate 2 from closed to open angle, the pressure angle of the first torsion spring 33 changes from... Figure 16 The angle changes to Figure 17 The angle in the middle; during the process of the upper connecting plate 2 rotating outward from the first opening angle to the maximum opening angle, the pressure angle of the second torsion spring 41 changes from... Figure 17 The angle changes to Figure 18 The opening and closing process is the opposite of the opening and closing process, thus ensuring that the torque provided by the torsion spring changes continuously during the opening and closing process, improving the user experience, etc.

[0058] The lower connecting plate 1 is provided with a third groove 13 for connecting to the pin of the first torsion spring 33, and a fourth groove 23 for connecting to the pin of the second torsion spring 41. This makes operation more convenient, reduces exposed parts, and makes the structure more aesthetically pleasing and compact. Furthermore, one pin of the first torsion spring 33 is fixedly connected to one pin of the second torsion spring 41, for example, the first torsion spring 33 and the second torsion spring 41 are integrally formed. The pin of the other end of the first torsion spring 33 is fixedly connected to the third groove 13, and the pin of the other end of the second torsion spring 41 is fixedly connected to the fourth groove 23, making the structure more stable and reliable.

[0059] Two first connecting posts 15 can be provided on the lower connecting plate 1. The fixing block and the first torsion spring 33 are located between the two first connecting posts 15. Each of the two first connecting posts 1 is provided with a connecting through hole that is hinged to the first shaft 3. The first groove 12 and the second cam 14 are provided on one of the first connecting posts 15, and the first limiting part 11 and the third groove 13 are provided on the other first connecting post 15. The force is more evenly distributed, and the structure is more compact and stable. Similarly, two second connecting posts 25 can also be provided on the lower connecting plate 1.

[0060] Compared with existing technologies, the advantages of this disclosure include: convenient operation, compact and stable structure; the dual-axis structure can distribute the force on the shaft and reduce wear on the shaft; the first stop 51 and the limit block 6 can realize the sequential action of opening and closing, reduce the force on the shaft and cam, simplify the part structure, and make the processing and manufacturing simpler; through the connection between the cam assembly 7 and the first torsion spring 33 and the second torsion spring 41, the continuity of torque change during the entire opening and closing process is ensured, and the feel is more continuous. In particular, the torsion spring is used to balance the torque change caused by gravity during the opening of the smart device. That is, when opening, the torsion spring torque gradually decreases, making the opening process easier, while when closing, the torsion spring torque gradually increases, supporting the smart device to fall during the closing process. The stability and reliability are high, which can ensure better opening and closing, and better meet the needs and experience of users. It is more convenient to use in portable smart device stands such as tablet computers and smartphones, such as Magic Keyboard for tablet computers, which enhances the competitiveness of the product and expands the application and development of the product.

[0061] The above descriptions are merely some embodiments of this disclosure, used only to illustrate the technical solutions of this disclosure, and not to limit it. It should be understood that those skilled in the art can make improvements or substitutions based on the above descriptions without departing from the inventive concept of this disclosure, and all such improvements and substitutions should fall within the protection scope of the appended claims. In such cases, all details can be replaced with equivalent elements, and materials, shapes, and sizes can also be arbitrary.

Claims

1. A hinge for a portable smart device stand, characterized in that, The system includes a lower connecting plate (1), an upper connecting plate (2), a first shaft (3), a second shaft (4), a fixed seat (5), and a limiting block (6). The lower connecting plate (1) is hinged to the first shaft (3), and the upper connecting plate (2) is hinged to the second shaft (4). The fixed seat (5) is fixedly connected to the first shaft (3) and the second shaft (4) in the circumferential direction. The fixed seat (5) is provided with a first stop (51) that can cooperate with the lower connecting plate (1) and the upper connecting plate (2) respectively. The limiting block (6) is fixedly connected to the first shaft (3) and the second shaft (4) in the circumferential direction respectively. The first shaft (3) and the second shaft (4) are respectively provided with cam assemblies (7) that provide frictional torque for their rotation. The upper connecting plate (2) can open and close relative to the lower connecting plate (1). 2) During the process of rotating outward from the closed position to the first opening angle, the second shaft (4) rotates outward synchronously. The first stop (51) cooperates with the upper connecting plate (2) to prevent the second shaft (4) and the upper connecting plate (2) from rotating relative to each other. When the upper connecting plate (2) rotates to the first opening angle, the limiting block (6) can restrict the lower connecting plate (1) from continuing to rotate outward. During the process of rotating outward from the first opening angle to the maximum opening angle, the first stop (51) cooperates with the lower connecting plate (1) to prevent the lower connecting plate (1) and the first shaft (3) from rotating relative to each other. The upper connecting plate (2) rotates relative to the second shaft (4). When the upper connecting plate (2) rotates to the maximum opening angle, the limiting block (6) can restrict the upper connecting plate (2) from continuing to rotate outward. The lower connecting plate (1) is provided with a first limiting part (11), the upper connecting plate (2) is provided with a second limiting part (21), and the limiting block (6) is provided with a third limiting part (61) that can cooperate with the first limiting part (11) and the second limiting part (21) respectively. The lower connecting plate (1) is provided with a first groove (12) that cooperates with the first stop (51), the upper connecting plate (2) is provided with a second groove (22) that cooperates with the first stop (51), and the fixed seat (5) is provided with a first sliding groove (52) that cooperates with the first stop (51). During the process of the upper connecting plate (2) rotating outward from the closed position to the first opening angle, the first stop (51) disengages from the first sliding groove (52), and the first stop (51) cooperates with the second groove (22) to stop the upper connecting plate (2). During the process of the upper connecting plate (2) rotating outward from the first opening angle to the maximum opening angle, the first stop (51) disengages from the second groove (22) along the first sliding groove (52), and the first stop (51) cooperates with the first groove (12) to stop the lower connecting plate (1).

2. The hinge for a portable smart device holder according to claim 1, characterized in that, The first shaft (3) is provided with a first flat part (31), the fixed seat (5) is provided with a first connecting hole (53) connected to the first shaft (3), the limiting block (6) is provided with a second connecting hole (62) connected to the first shaft (3), the first connecting hole (53) is provided with a second flat part (54) that cooperates with the first flat part (31), and the second connecting hole (62) is provided with a third flat part (63) that cooperates with the first flat part (31).

3. The hinge for a portable smart device holder according to claim 2, characterized in that, One end of the fixed seat (5) presses against the lower connecting plate (1) and the upper connecting plate (2) respectively, and the first shaft (3) and the second shaft (4) are respectively provided with a first snap ring (8) that cooperates with the other end of the fixed seat (5).

4. The hinge for a portable smart device holder according to claim 1, characterized in that, The cam assembly (7) includes a first cam (71) and a first elastic element (72). The lower connecting plate (1) is provided with a second cam (14) that cooperates with the first cam (71). The first elastic element (72) enables the first cam (71) and the second cam (14) to cooperate elastically. One end of the first elastic element (72) presses against the first cam (71). The first shaft (3) is provided with a first nut (32) that cooperates with the other end of the first elastic element (72).

5. The hinge for a portable smart device holder according to claim 4, characterized in that, The first elastic element (72) is a disc spring sleeved on the first shaft (3).

6. The hinge for a portable smart device holder according to any one of claims 1 to 5, characterized in that, A first torsion spring (33) is sleeved on the first shaft (3), and a second torsion spring (41) is sleeved on the second shaft (4). During the process of the upper connecting plate (2) rotating outward from the closed position to the first opening angle, the torque generated by the first torsion spring (33) gradually decreases. During the process of the upper connecting plate (2) rotating outward from the first opening angle to the maximum opening angle, the torque generated by the second torsion spring (41) gradually decreases.

7. The hinge for a portable smart device holder according to claim 6, characterized in that, The lower connecting plate (1) is provided with a third groove (13) that connects to the pin of the first torsion spring (33), and the upper connecting plate (2) is provided with a fourth groove (23) that connects to the pin of the second torsion spring (41).

8. The hinge for a portable smart device holder according to claim 7, characterized in that, One end of the first torsion spring (33) is fixedly connected to one end of the second torsion spring (41), the other end of the first torsion spring (33) is fixedly connected to the third groove (13), and the other end of the second torsion spring (41) is fixedly connected to the fourth groove (23).

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