Connecting unit and support

Abstract

The connecting unit comprises a connecting piece and a shaft core, the connecting piece is provided with a shaft hole penetrating through the two ends of the connecting piece, and the shaft core is installed in the shaft hole; an opening communicated with the shaft hole is formed in the outer side of the connecting piece; a first groove is concavely formed in the side wall of the shaft hole, and the first groove and the opening penetrate through the two ends of the connecting piece in the axial direction of the shaft hole; a first tangent plane is formed on the side wall of the shaft hole, and a second tangent plane is formed on the surface of the shaft core. According to the connecting unit, the groove is formed in the shaft hole, so that deformation stress dispersion and oil storage functions are achieved, the rotating smoothness of the shaft core in the shaft hole is improved, concentrated stress is dispersed, and the side wall of the shaft hole is prevented from being broken; the shaft hole and the shaft core are matched and positioned through a tangent plane, so that the rotating shaft is conveniently positioned and reset; the utility model further provides a support comprising the connecting unit.

Description

Technical Field

[0001] The utility model relates to the field of supporting devices, in particular to a connecting unit and a bracket. Background Art

[0002] The bracket products currently sold on the market include a bracket main body, a base and a connecting member. The connecting member is used to connect the bracket main body and the base, so that the bracket main body can be rotated relative to the base for storage or opening. Among them, the connecting member includes a shaft core fixedly connected to the base and a fixing piece fixedly connected to the bracket main body. The fixing piece is provided with a shaft hole for accommodating the shaft core, and the shaft core is rotatably arranged in the shaft hole, so as to realize the flipping of the bracket main body relative to the base. The shaft hole is usually formed by stamping and curling one end of the fixing piece, and there is no groove designed on the side wall of the existing fixing piece shaft hole to store lubricating oil or provide elastic deformation to the side wall of the shaft hole. When the shaft core rotates in the shaft hole, the side wall of the shaft hole is prone to cracking, and the rotation of the shaft hole lacks flexibility, which easily leads to an increase in rotation resistance and wear, and further affects the reliability and durability of the product during long-term use.

[0003] Moreover, there is no mating positioning of the cut surface between the shaft hole and the shaft core. When the rotation of the shaft core stops, it is easy to cause a reduction in the positioning accuracy between the shaft core and the shaft hole, resulting in situations where the rotation cannot be positioned and it is difficult to accurately reset, which affects the use effect of the product. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a connecting unit, which realizes stress dispersion through deformation and oil storage function by opening a groove in the shaft hole, improves the smoothness of the rotation of the shaft core in the shaft hole, and disperses the concentrated stress to prevent the side wall of the shaft hole from breaking; at the same time, the mating positioning of the cut surface is used between the connecting member and the shaft core, which is convenient for the positioning and reset of the bracket with this connecting unit.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A connecting unit includes a connecting member and a shaft core. The connecting member is provided with a shaft hole penetrating through its two ends, and the shaft core is installed in the shaft hole; the shaft hole penetrates through the side of the connecting member to form an opening communicating with the outside; a first groove is recessed on the side wall of the shaft hole, and both the first groove and the opening penetrate through the two ends of the connecting member along the axial direction of the shaft hole; a first cut surface is formed on the side wall of the shaft hole, and a second cut surface is formed on the surface of the shaft core.

[0007] As a further improvement of the above technical solution, the connecting member is an integrally formed structure, including a fixing part and a connecting part. The shaft hole is arranged in the connecting part, the opening is arranged on the connecting part, and the length dimension of the connecting part is greater than the diameter dimension of the shaft hole.

[0008] As a further improvement of the above technical solution, the connecting portion includes a first elastic arm, a second elastic arm, and a base located between the first elastic arm and the second elastic arm. The first elastic arm, the second elastic arm, and the base enclose to form the shaft hole. The opening is located between the first elastic arm and the second elastic arm, and the fixing portion is connected to the base. The first groove is provided on the base, or at the connection between the base and the first elastic arm or the second elastic arm.

[0009] As a further improvement of the above technical solution, a second groove is recessed on the side wall of the shaft hole. The second groove axially penetrates both ends of the connecting member along the shaft hole, and the second groove is provided on the first elastic arm and / or the second elastic arm.

[0010] As a further improvement of the above technical solution, the radius or depth of the first groove is greater than the radius or depth of the second groove; and / or, the second groove is provided on the first elastic arm, and the first section plane is provided on the second elastic arm.

[0011] As a further improvement of the above technical solution, an outer groove is provided on the outer side wall of the base, or on the outer side wall at the connection between the base and the first elastic arm or the second elastic arm.

[0012] As a further improvement of the above technical solution, lubricating oil is provided in the first groove and / or the second groove.

[0013] As a further improvement of the above technical solution, oil blocking members are provided at both ends of the first groove and / or the second groove.

[0014] As a further improvement of the above technical solution, the opening is provided on the side of the shaft hole away from the fixing portion, the first groove is provided on the side of the shaft hole close to the fixing portion, and the first section plane is close to the opening.

[0015] As a further improvement of the above technical solution, the first section plane is connected to the surface of the opening.

[0016] As a further improvement of the above technical solution, the shaft core includes a shaft core main body, a limiting end, and a fixing end. The limiting end and the fixing end are respectively provided at both ends of the shaft core main body, and the cross-sectional dimension of the limiting end is larger than the cross-sectional dimensions of the shaft core main body and the fixing end.

[0017] As a further improvement of the above technical solution, the limiting end is provided with two opposite first flat portions, the first flat portions are parallel to the second cutting surface, and one of the first flat portions and the second cutting surface are on the same side of the axis; the fixed end is provided with two opposite second flat portions, the second flat portions are parallel to the second cutting surface, and one of the second flat portions and the second cutting surface are on the same side of the axis.

[0018] As a further improvement of the above technical solution, the surface of the first flat portion on the same side of the axis as the second cutting surface is higher than the second cutting surface, and the surface of the second flat portion on the same side of the axis as the second cutting surface is lower than the second cutting surface.

[0019] As a further improvement of the above technical solution, there are two connecting portions which are respectively located on both sides of the fixing portion. Each connecting portion is respectively provided with the shaft hole, the axis and the opening. The opening on each connecting portion is located on the side of the connecting portion away from the fixing portion, and the first groove on each connecting portion is located on the side of the connecting portion close to the fixing portion.

[0020] As a further improvement of the above technical solution, a second groove axially penetrating the connecting portion is recessed on the side wall of each shaft hole. The first grooves, second grooves, openings and first cutting surfaces in the two connecting portions are centrosymmetrically arranged.

[0021] As a further improvement of the above technical solution, gear structures engaged with each other are provided on the axes in the two shaft holes.

[0022] On the other hand, a bracket is further provided, which includes any one of the above connecting units, a mounting member and a supporting member, and the supporting member can rotate relative to the mounting member.

[0023] The beneficial effects of the present utility model are as follows: By providing grooves on the inner side wall of the shaft hole of the connecting member to form an oil groove and an elastic groove, deformation is achieved to disperse stress and at the same time the oil storage function is realized, making the rotation of the axis more stable and reliable. The grooves can absorb part of the impact force brought by the axis, thereby dispersing the stress generated by the rotation of the axis on the connecting member (i.e., the side wall of the shaft hole), and preventing the side wall of the shaft hole from cracking. At the same time, the oil storage function can be realized in the grooves, improving the smoothness of the rotation of the axis in the shaft hole. The cutting surfaces provided on the axis and the shaft hole cooperate with each other, which can position the axis in the connecting member, prevent the axis from rotating randomly, and also facilitate the rotation and reset of the bracket with the connecting unit. Description of the Drawings

[0024] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0025] Figure 1This is a schematic diagram of the assembly of the connecting unit of the first embodiment of the present utility model;

[0026] Figure 2 yes Figure 1 Explosion diagram of

[0027] Figure 3 yes Figure 2 A schematic structural diagram of a first embodiment of the middle connecting member;

[0028] Figure 4 yes Figure 3 Side view of the middle connector;

[0029] Figure 5 yes Figure 2 a side view of a second embodiment of the middle connector;

[0030] Figure 6 yes Figure 2 A side view of a third embodiment of the middle connector;

[0031] Figure 7 yes Figure 2 Schematic diagram of the shaft core structure;

[0032] Figure 8 yes Figure 7 Another angle diagram of the diagram;

[0033] Figure 9 This is an exploded schematic diagram of the connecting unit of the second embodiment of the present utility model;

[0034] Figure 10 yes Figure 9 A side view of the connector in FIG.

[0035] Figure 11 This is a schematic diagram of the assembly of the bracket of the utility model;

[0036] Figure 12 yes Figure 11 Schematic diagram of the structure of the installation parts.

[0037] Explanation of the reference numerals: 100-connecting member; 110-fixing portion; 120-connecting portion; 1201-first elastic arm; 1202-second elastic arm; 1203-base; 121-axial hole; 122-opening; 123-first section; 124-first groove; 125-second groove; 126-outer groove; 200-axis core; 210-axis core body; 211-second section; 220-limiting end; 221-first plane portion; 230-fixing end; 231-second plane portion; 300-mounting member; 301-accommodating position; 302-first card slot; 303-second card slot; 400-support member. DETAILED DESCRIPTION

[0038] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative work all fall within the scope of protection of the present utility model. In addition, all connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the creation of the present utility model can be interactively combined on the premise of not conflicting with each other.

[0039] Embodiment 1

[0040] Please refer to Figure 1 and Figure 2 , the embodiment of the present utility model provides a connection unit, including a connecting piece 100 and a shaft core 200. The connecting piece 100 is an integrally formed structure, and the shaft core 200 is a cylindrical structure. Among them, a shaft hole 121 is provided on the connecting piece 100, and the shaft core 200 can be fitted into the shaft hole 121, and the shaft core 200 can rotate in the shaft hole 121. An opening 122 communicating with the shaft hole 121 is formed on the outer side of the connecting piece 100, and the opening 122 axially penetrates through both ends of the connecting piece 100 along the shaft hole 121.

[0041] Moreover, a first groove 124 is recessed on the side wall of the shaft hole 121, and the first groove 124 axially penetrates through both ends of the connecting piece 100 along the shaft hole 121. When the shaft core 200 penetrates into the shaft hole 121 and rotates at the shaft hole 121, the first groove 124 can provide elastic deformation for the side wall of the shaft hole 121 to prevent the side wall of the shaft hole 121 from breaking, and the first groove 124 can realize the function of storing lubricating oil to improve the smoothness of the rotation of the shaft core 200 in the shaft hole 121.

[0042] Furthermore, a first cutting surface 123 is formed by cutting on the inner wall of the shaft hole 121 of the connecting piece 100, and a second cutting surface 211 is cut on the shaft core 200. When the shaft core 200 penetrates into the shaft hole 121, the first cutting surface 123 and the second cutting surface 211 cooperate with each other to limit the shaft core 200 in the shaft hole 121 and prevent the shaft core 200 from rotating randomly. And when the shaft core 200 needs to rotate back to its original position, when rotating close to the cutting surface position, the two cutting surfaces automatically cooperate and correspond to reset the shaft core 200, thereby facilitating the reset of the bracket provided with the connection unit.

[0043] When the shaft core 200 rotates within the shaft hole 121 of the connector 100, the shaft core 200 generates contact stress on the connector 100 due to the second cut surface 211 and the first cut surface 123. The opening 122 provides the connector 100 with a certain amount of elastic deformation space, which can adjust the elasticity during torque transmission, making the rotation of the shaft core 200 more stable and reliable. In addition, the opening of the first groove 124 reduces the thickness of the side wall of the shaft hole 121 corresponding to the position of the first groove 124, dispersing the stress generated by the shaft core 200 on the connector 100 when rotating within the shaft hole 121. This can absorb part of the impact force when the shaft hole 121 of the connector 100 is subjected to force, thereby preventing the connector 100 from breaking.

[0044] Please refer to Figure 3 as well as Figure 4 The connector 100 is an integrally formed structure, comprising a fixing portion 110 and a connecting portion 120. The length of the connecting portion 120 is greater than the diameter of the axial hole 121, which increases the force range between the shaft core 200 and the connector 100 and makes the connector 100 less likely to break. The fixing portion 110 is also provided with a number of fixing holes for securing the connector 100 to the bracket via screws or rivets. The axial hole 121 is provided within the connecting portion 120 for connection to the shaft core 200.

[0045] Specifically, the connecting portion 120 includes a first elastic arm 1201, a second elastic arm 1202, and a base 1203. The base 1203 is disposed between the first elastic arm 1201 and the second elastic arm 1202. The first elastic arm 1201, the second elastic arm 1202, and the base 1203 together form an axial hole 121. The base 1203 is disposed on the side of the axial hole 121 close to the fixed portion 110 and is connected to the fixed portion 110. The opening 122 is disposed between the first elastic arm 1201 and the second elastic arm 1202 and on the side of the axial hole 121 away from the fixed portion 110. The thickness of the base 1203 is relatively large, and a first groove 124 is preferably disposed on the base 1203 to reduce the stress on this portion when the shaft core 200 rotates. The base 1203 is a stress concentration area of the connecting portion 120, and the first groove 124 is disposed on the base 1203 to disperse the stress on the base 1203. In other embodiments, the first groove 124 may also be provided at the connection between the base 1203 and the first elastic arm 1201 or the second elastic arm 1202 .

[0046] Furthermore, a second groove 125 is recessed in the side wall of the shaft hole 121. The second groove 125 is parallel to the first groove 124 and penetrates through both ends of the connecting member 100 along the axial direction of the shaft hole 121. The second groove 125 can store lubricating oil to help lubricate the shaft core 200 when it rotates in the shaft hole 121, making the rotation of the shaft core 200 smoother. Moreover, the second groove 125 can also, together with the first groove 124, reduce the stress on the connecting portion 120 and disperse the stress. In this embodiment, the second groove 125 is provided on the first elastic arm 1201. In other embodiments, the second groove 125 can also be provided on the second elastic arm 1202.

[0047] The middle position of the elastic arm is also a stress concentration area. The second groove 125 is provided on the side of the first elastic arm 1201 or the second elastic arm 1202 close to the shaft hole 121 and at the middle position of the first elastic arm 1201 or the second elastic arm 1202, so that the first elastic arm 1201 or the second elastic arm 1202 can disperse the stress when stressed and prevent the elastic arm from breaking.

[0048] Furthermore, the first groove 124 and the second groove 125 can be semi-circular arc grooves, square grooves or V-shaped grooves. Usually, semi-circular arc grooves are used to disperse the stress more evenly. In the embodiment of the present utility model, both the first groove 124 and the second groove 125 are semi-circular arc grooves. Moreover, since the base 1203 is subject to greater concentrated stress, the radius or depth of the first groove 124 is greater than the radius or depth of the second groove 125 to disperse the stress to a greater extent.

[0049] Furthermore, lubricating oil is provided in the first groove 124 and / or the second groove 125. Since lubricating oil is applied to the shaft core 200 before it is inserted into the shaft hole 121, when the shaft core 200 rotates in the shaft hole 121, the lubricating oil on the shaft core 200 is stored in the first groove 124 and / or the second groove 125. Moreover, oil blocking members (not shown) are provided at both ends of the first groove 124 and / or the second groove 125 to prevent the lubricating oil from flowing out of the groove and causing waste.

[0050] Please refer to again Figure 4, the first cut surface 123 is formed on any one of the elastic arms. In this embodiment, the first cut surface 123 is formed on the second elastic arm 1202. In other embodiments, the first cut surface 123 may also be formed on the first elastic arm 1201. Among them, the first cut surface 123 is disposed near the opening 122. Preferably, the first cut surface 123 is directly connected to the surface of the opening 122. The second cut surface 211 of the shaft core 200 is fitted and abutted with the first cut surface 123. When the shaft core 200 rotates, the stress applied by the first cut surface 123 to the shaft core 200 is dispersed by the opening 122, which can prevent the contact stress received by the shaft core 200 from being too large and causing fracture.

[0051] The embodiment of the present invention also provides a second type of connector 100. Please refer to Figure 5 , different from the connector 100 of the first embodiment in the above Figure 4 , in this embodiment, two second grooves 125 are provided on the connector 100. One of the second grooves 125 is disposed on the inner side wall of the first elastic arm 1201, and the other second groove 125 is disposed on the inner side wall of the second elastic arm 1202. The two second grooves 125 are both disposed at the middle positions of the corresponding elastic arms to disperse the concentrated stress of the corresponding elastic arms and prevent the elastic arms from breaking. And when the shaft core 200 rotates, the lubricating oil on the shaft core 200 can be stored in the two second grooves 125, and oil blocking members (not shown) are provided at both ends of the two second grooves 125, which can prevent the lubricating oil from flowing out of the grooves and causing waste.

[0052] The embodiment of the present invention also provides a third type of connector 100. Please refer to Figure 6 , different from the connector 100 of the first embodiment in the above Figure 4 , in this embodiment, a second groove 125 and an outer groove 126 are provided on the connector 100. The second groove 125 is disposed on the inner side wall of the first elastic arm 1201 or the second elastic arm 1202, and the outer groove 126 is disposed on the outer side wall of the base 1203, or on the outer side wall at the connection between the base 1203 and the first elastic arm 1201 or the second elastic arm 1202. Since the thickness of the base 1203 and its position close to the elastic arm or connected to the elastic arm is increased, the concentrated stress is also received. The outer groove 126 is disposed on the base 1203, or at the connection position between the base 1203 and the first elastic arm 1201 or the second elastic arm 1202, so that the base 1203 has better deformation ability and vibration absorption ability, reduces local stress concentration, can increase the flexibility of the elastic arm, disperses the concentrated stress on the elastic arm, and prevents the elastic arm from breaking.

[0053] Please refer to Figure 7 and Figure 8, the shaft core 200 includes a shaft core main body 210, a limiting end 220, and a fixing end 230. The limiting end 220 and the fixing end 230 are respectively arranged at both ends of the shaft core main body 210. Among them, the cross-sectional dimension of the limiting end 220 is larger than that of the shaft core main body 210, which can prevent the entire shaft core 200 from directly passing through the shaft hole 121 and falling from the other end, facilitating assembly.

[0054] Furthermore, two relatively arranged first plane portions 221 are provided at the limiting end 220, and the first plane portions 221 are parallel to the second cutting surface 211. One of the first plane portions 221 and the second cutting surface 211 are on the same side, and the surface of this first plane portion 221 is higher than the second cutting surface 211, which can prevent the entire shaft core 200 from directly passing through the shaft hole 121. Similarly, two opposite second plane portions 231 are provided at the fixing end 230, and the second plane portions 231 are respectively parallel to the first plane portions 221 of the limiting end 220. One of the second plane portions 231 and the second cutting surface 211 are on the same side, and the surface of this second plane portion 231 is lower than the second cutting surface 211, so that the cross-sectional dimension of the fixing end 230 is smaller than that of the shaft core main body 210, facilitating the shaft core 200 to extend into the shaft hole 121 from the fixing end 230.

[0055] Please refer to Figure 11 and Figure 12 , the present utility model further provides a bracket, including the connecting unit described in any one of the above embodiments.

[0056] The bracket further includes a mounting member 300 and a supporting member 400. The mounting member 300 is used for being fixedly arranged on a mobile phone case or other devices that need to be supported. The connecting member 100 rotatably connects the mounting member 300 and the supporting member 400. The supporting member 400 is used for providing support to the mobile phone case or other supporting devices.

[0057] Among them, a receiving position 301 is provided on the mounting member 300 for receiving the shaft core 200 and the connecting portion 120 of the connecting member 100. A first card slot 302 and a second card slot 303 are respectively opened at both ends of the receiving position 301. The first card slot 302 and the second card slot 303 respectively penetrate through the mounting member 300, and the cross-sectional dimension of the first card slot 302 is larger than that of the second card slot 303. Opposite two cutting surfaces are respectively provided on the inner walls of the first card slot 302 and the second card slot 303, which cooperate with the plane portions at both ends of the shaft core. Furthermore, the limiting end 220 of the shaft core 200 is used for matching with the first card slot 302 and being snap-fitted and fixed in the first card slot 302; the fixing end 230 of the shaft core 200 is used for matching with the second card slot 303 and being snap-fitted and fixed in the second card slot 303, thereby fixing the shaft core 200 and the connecting portion 120 in the receiving position 301.

[0058] When assembling and connecting the bracket, fixedly connect the fixing part 110 of the connecting piece 100 with the supporting piece 400, then align the shaft hole 121 of the connecting piece 100 with the first card slot 302 and the second card slot 303. The fixed end 230 of the shaft core 200 sequentially passes through the first card slot 302, the shaft hole 121, and the second card slot 303. Since the cross-sectional dimension of the limiting end 220 is larger than that of the shaft core body 210, the limiting end 220 can be prevented from penetrating into the shaft hole 121. And only the fixed end 230 can be accommodated in the second card slot 303, so the shaft core body 210 can be prevented from penetrating into the second card slot 303, thereby fixing the connecting part 100 in the accommodating position 301, thus obtaining Figure 11 the bracket in

[0059] Embodiment Two

[0060] Please refer to Figure 9 and Figure 10 , this embodiment also provides a connection unit, including a connecting piece 100 and two shaft cores 200. The structures of the two shaft cores 200 are basically the same as those of the shaft cores 200 of the connection unit provided in Embodiment One of the present utility model. However, the connecting piece 100 provided in this embodiment is provided with two connecting parts 120. The two connecting parts 120 are located on both sides of the fixing part 110. The fixing part 110 is designed to connect the two connecting parts 120. The structure of each connecting part 120 is the same as that of the connecting part 120 provided in Embodiment One of the present utility model. Each connecting part 120 is provided with a shaft hole 121, a first groove 124, a first cutting surface 123, a shaft core 200, and an opening 122.

[0061] In another embodiment, an outer groove is further provided in each connecting part 120. The outer groove is arranged on the outer side of the connecting piece 100. The connection position of the connecting part 120 and the fixing part 110 is the base. The outer groove is arranged on the base. When the shaft core 200 rotates, the concentrated stress received by the fixing part 110 is reduced. The outer groove is arranged on the base close to the fixing part 110, so that the fixing part 110 has better deformation ability and vibration absorption ability, reduces local stress concentration, and can prevent the elastic arm from breaking.

[0062] As Figure 10 shown, the openings 122 provided on the connecting part 120 are all arranged on the side of the shaft hole 121 away from the fixing part 110. And the first groove 124 is arranged on the side of the shaft hole 121 close to the fixing part 110. Since the thickness of the part of the connecting piece 100 corresponding to the fixing part 110 is larger, the two first grooves 124 are arranged at the middle position on the side of the shaft hole 121 close to the fixing part 110. The first groove 124 can absorb part of the impact force when the shaft core 200 rotates and the connecting part 120 is stressed, thereby reducing the stress generated on the connecting piece 100 when the shaft core 200 rotates and avoiding the fracture of the connecting piece 100.

[0063] Furthermore, the second grooves 125 on the two connecting portions 120 are respectively arranged on different elastic arms, and the first cutting surfaces 123 are arranged on the elastic arms opposite to the second grooves 125 on the connecting portions 120. Therefore, the two second grooves 125 and the two first cutting surfaces 123 are centrosymmetric on the connecting member 100. And the openings 122 and the first grooves 124 are arranged oppositely. Therefore, the first cutting surfaces 123, the second grooves 125, the openings 122 and the first grooves 124 in the two connecting portions 120 are integrally centrosymmetrically arranged on the connecting member 100. Through the internally centrosymmetric structure, the connecting member 100 of this embodiment has a consistent structure in different forward and reverse directions, without the need to distinguish directions, which is convenient for assembly. Moreover, the connecting member 100 has a stress-dispersing structure in the connecting portions 120 on both sides, which is convenient for the two shaft cores 200 to disperse the stress received when rotating in different directions in the shaft holes 121.

[0064] And in this embodiment, it includes two shaft cores 200, which are respectively inserted into the two corresponding shaft holes 121 of the connecting member 100. At one end of the two shaft cores 200, there are also engaged gear structures, enabling the two shaft cores 200 to engage and drive each other, making the rotation of the two shaft cores 200 in the shaft holes 121 more stable.

[0065] When the connection unit of this embodiment is applied to a bracket, the support member is fixedly connected to one of the shaft cores 200, and the other shaft core 200 is fixedly connected to the mounting member. Since the two shaft cores 200 can engage and drive each other, the relative rotation between the support member and the mounting member is realized, helping the support member to generate a 180-degree flip, and realizing the rotation opening and folding storage of the bracket.

[0066] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the described embodiment. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A connecting unit, characterized in that, It includes a connecting piece (100) and a shaft core (200). The connecting piece (100) is provided with a shaft hole (121) penetrating through both ends thereof, and the shaft core (200) is installed in the shaft hole (121); an opening (122) communicating with the shaft hole (121) is formed on the outer side of the connecting piece (100); a first groove (124) is recessed on the side wall of the shaft hole (121), and both the first groove (124) and the opening (122) penetrate through both ends of the connecting piece (100) along the axial direction of the shaft hole (121); a first cutting surface (123) is formed on the side wall of the shaft hole (121), and a second cutting surface (211) is formed on the surface of the shaft core (200).

2. The connecting unit according to claim 1, characterized in that The connecting piece (100) is an integrally formed structure, including a fixing part (110) and a connecting part (120). The shaft hole (121) is provided in the connecting part (120), the opening (122) is arranged on the connecting part (120), and the length dimension of the connecting part (120) is greater than the diameter dimension of the shaft hole (121).

3. The connecting unit according to claim 2, characterized in that, The connecting part (120) includes a first elastic arm (1201), a second elastic arm (1202) and a base (1203) located between the first elastic arm (1201) and the second elastic arm (1202). The first elastic arm (1201), the second elastic arm (1202) and the base (1203) enclose to form the shaft hole (121), the opening (122) is located between the first elastic arm (1201) and the second elastic arm (1202), and the fixing part (110) is connected to the base (1203); the first groove (124) is arranged on the base (1203), or arranged at the connection between the base (1203) and the first elastic arm (1201) or the second elastic arm (1202).

4. The connecting unit according to claim 3, wherein A second groove (125) is further recessed on the side wall of the shaft hole (121). The second groove (125) penetrates through both ends of the connecting piece (100) along the axial direction of the shaft hole (121), and the second groove (125) is arranged on the first elastic arm (1201) and / or the second elastic arm (1202).

5. The connecting unit according to claim 4, characterized in that, The radius or depth of the first groove (124) is greater than the radius or depth of the second groove (125); and / or, the second groove (125) is arranged on the first elastic arm (1201), and the first cutting surface (123) is arranged on the second elastic arm (1202).

6. The connecting unit according to claim 3, characterized in that, An outer groove (126) is provided on the outer side wall of the base (1203), or on the outer side wall at the connection between the base (1203) and the first elastic arm (1201) or the second elastic arm (1202).

7. The connecting unit according to claim 4, characterized in that Lubricating oil is provided in the first groove (124) and / or the second groove (125).

8. The connecting unit according to claim 7, wherein Oil blocking parts are provided at both ends of the first groove (124) and / or the second groove (125).

9. The connecting unit according to claim 2, characterized in that, The opening (122) is provided on a side of the shaft hole (121) away from the fixing portion (110), the first groove (124) is provided on a side of the shaft hole (121) close to the fixing portion (110), and the first cutting surface (123) is arranged close to the opening (122).

10. The connecting unit according to claim 9, characterized in that, The first cutting surface (123) is connected to the surface of the opening (122).

11. The connecting unit according to any one of claims 1-10, characterized in that, The shaft core (200) includes a shaft core main body (210), a limiting end (220), and a fixing end (230). The limiting end (220) and the fixing end (230) are respectively arranged at two ends of the shaft core main body (210), and the cross-sectional dimension of the limiting end (220) is larger than the cross-sectional dimensions of the shaft core main body (210) and the fixing end (230).

12. The connection unit according to claim 11, characterized in that, Two opposite first planar portions (221) are provided on the limiting end (220). The first planar portions (221) are parallel to the second cutting surface (211), and one of the first planar portions (221) and the second cutting surface (211) are located on the same side of the shaft core (200); two opposite second planar portions (231) are provided on the fixing end (230). The second planar portions (231) are parallel to the second cutting surface (211), and one of the second planar portions (231) and the second cutting surface (211) are located on the same side of the shaft core (200).

13. The connecting unit according to claim 12, characterized in that, The surface of the first planar portion (221) located on the same side of the shaft core (200) as the second cutting surface (211) is higher than the second cutting surface (211), and the surface of the second planar portion (231) located on the same side of the shaft core (200) as the second cutting surface (211) is lower than the second cutting surface (211).

14. The connecting unit according to any one of claims 2-10, characterized in that, Two connecting portions (120) are provided and are respectively located on two sides of the fixing portion (110). Each connecting portion (120) is respectively provided with the shaft hole (121), the shaft core (200), and the opening (122). The opening (122) on each connecting portion (120) is located on a side of the connecting portion (120) away from the fixing portion (110), and the first groove (124) on each connecting portion (120) is located on a side of the connecting portion (120) close to the fixing portion (110).

15. The connecting unit according to claim 14, characterized in that, A second groove (125) axially penetrating the connecting portion (120) is recessed on the side wall of the shaft hole (121) of each connecting portion (120). The first grooves (124), second grooves (125), openings (122), and first cutting surfaces (123) in the two connecting portions (120) are arranged in central symmetry.

16. The connecting unit according to claim 14, characterized in that, Gear structures that mesh with each other are provided on the shaft cores (200) in the two shaft holes (121).

17. A bracket, characterized in that, Including the connecting unit according to any one of claims 1-16, a mounting member (300), and a support member (400), and the support member (

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