Supporting arm connecting structure

Abstract

A supporting arm connecting structure comprises a limiting base and a linkage rod and is applied to a supporting arm mechanism, the supporting arm mechanism comprises a guide base, a supporting arm, a fixed wheel and an elastic piece, a containing cavity for containing the elastic piece is formed in the supporting arm, a rotating base hinged to the guide base in a damping mode is arranged at the end of the supporting arm, and the fixed wheel is located in the rotating base and fixedly connected with the guide base; the limiting seat is installed in the containing cavity and connected with the rotating seat, a limiting block connected with the head end of the elastic piece is arranged on the limiting seat, the tail end of the elastic piece is rotationally connected with the head end of the linkage rod, and the tail end of the linkage rod is rotationally connected with the fixed wheel; the linkage rod is designed to be used for connecting the elastic piece and the fixed wheel, so that the linkage rod bears and disperses loads, the limiting seat is used for installing and bearing the elastic piece, the pressure applied to the limiting seat by the elastic piece is transferred to the supporting arm after being transferred by the rotating seat, and it is ensured that overall stress is more balanced; according to the design, the structural stability can be improved, the possibility that the connecting part of the elastic piece and the cam is broken is reduced, and the use safety is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of bracket accessories, and in particular relates to a support arm connection structure. Background Technology

[0002] With the increasing popularity of electronic products such as mobile phones and tablets, more and more people are using electronic products to watch dramas or live streams, so the usage rate of equipment stands is also increasing. Conventional equipment stands use the elastic potential energy of elastic components to achieve force balance, so that each arm can stop in its current position after swinging, in order to adapt to the usage requirements of various scenarios. However, they have problems such as exposed elastic components and unstable use.

[0003] To address this, the applicant proposed a support arm connection structure and a mobile phone holder in utility model patent application number 2023227421174. The support arm connection structure installs an elastic element in the receiving cavity of the support arm to ensure the service life of the elastic element. The fixed wheel, the limiting block and the elastic element work together to solve the problem of instability in the use of conventional equipment holders.

[0004] However, according to user feedback, during the frequent adjustment of the swing position, the pressure applied by the elastic element directly acts on the connection between the elastic element and the cam in the support arm connection structure, making the connection part prone to breakage and resulting in poor structural stability. After the connection part breaks, it may cause the elastic element to deform violently, causing the support arm to swing rapidly and hit the user, posing a significant safety hazard. Therefore, it is necessary to design a support arm connection structure to solve this problem. Utility Model Content

[0005] Technical problems to be solved

[0006] This invention provides a support arm connection structure that can improve structural stability, reduce the possibility of breakage at the connection between the elastic element and the cam, and ensure safety in use.

[0007] Technical solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A support arm connection structure, used in a support arm mechanism, includes a limiting seat and a linkage rod: the support arm mechanism includes a guide seat, a support arm, a fixed wheel, and an elastic element; the support arm has a cavity for housing the elastic element; the end of the support arm has a rotating seat that is damped and hinged to the guide seat; the fixed wheel is located in the rotating seat and fixedly connected to the guide seat; the limiting seat is installed in the cavity and connected to the rotating seat; the end of the limiting seat away from the guide seat has a limiting block; the limiting block is connected to the first end of the elastic element; the last end of the elastic element is rotatably connected to the first end of the linkage rod; and the last end of the linkage rod is rotatably connected to the fixed wheel.

[0010] Preferably, the device further includes fasteners, which include a first fastener and a second fastener. The fixing wheel has a fixing hole. The first fastener rotatably passes through the first end of the linkage rod and the tail end of the elastic element, and both ends of the first fastener abut against the linkage rod and the elastic element, respectively. One end of the second fastener rotatably passes through the tail end of the linkage rod and is threadedly connected to the fixing hole, and the other end of the fastener abuts against the linkage rod.

[0011] Preferably, the fastener further includes a pressure plate and a stud, the pressure plate and the stud being used to replace the second fastening bolt; the pressure plate is mounted on the fixed wheel and surrounds and abuts the linkage rod, and the pressure plate is provided with a movable hole; one end of the stud is threadedly connected to the fixed hole, and the other end of the stud slidably passes through the linkage rod and extends into the movable hole, swinging the linkage rod can drive the stud to rotate and move within the movable hole.

[0012] Preferably, a locking bolt is installed on the pressure plate, one end of the locking bolt abuts against the pressure plate, the other end of the locking bolt passes through the pressure plate and is threadedly connected to the fixed wheel, and a sleeve is fitted on the locking bolt, with both ends of the sleeve abutting against the pressure plate and the fixed wheel respectively.

[0013] Preferably, the fastener further includes a hollow bushing, which is installed at the movable hole and has a shoulder block that synchronously abuts against the pressure plate and the linkage rod; the end of the stud away from the fixed wheel slidably passes through the linkage rod and the shoulder block and extends into the bushing, and swinging the linkage rod can drive the stud to rotate and move within the bushing.

[0014] Preferably, a reinforcing rib is installed at the tail end of the linkage rod, and the shoulder block abuts against the pressure plate and the reinforcing rib; the end of the stud away from the fixed wheel slidably passes through the linkage rod, the reinforcing rib and the shoulder block and extends into the bushing, and swinging the linkage rod can drive the stud to rotate and move within the bushing.

[0015] Preferably, the linkage rod is designed with a bend in the middle so that the first end of the linkage rod is offset from the last end of the linkage rod.

[0016] Preferably, the limiting block is provided with a limiting hole, the first end of the elastic element is installed at the limiting hole, and the fixing hole is designed to be offset from the limiting hole so that the elastic element is installed at an angle in the receiving cavity.

[0017] Preferably, the elastic element includes an adjusting rod, a spring, and a connecting rod; the adjusting rod is mounted on the spring as the first end of the elastic element, and the end of the adjusting rod away from the spring passes through the limiting hole and has a stop block that abuts against the limiting block; the connecting rod is mounted on the spring as the last end of the elastic element, and the end of the connecting rod away from the spring is rotatably connected to the linkage rod.

[0018] Preferably, the elastic element further includes a threaded sleeve, which is mounted on the spring and threadedly connected to the adjusting rod, and the adjusting rod is also rotatably engaged with the limiting hole.

[0019] Preferably, the device further includes a damping element, which comprises a lower connecting sleeve, an upper connecting sleeve, a friction plate, and a retaining shaft; the lower connecting sleeve is mounted on the guide seat, the retaining shaft is fixedly mounted on the lower connecting sleeve, and one end of the retaining shaft extends into the rotating seat and is fixedly connected to the fixed wheel; the upper connecting sleeve is mounted on the rotating seat and is rotatably sleeved on the retaining shaft; the friction plate is fixedly mounted on the retaining shaft and abuts against the upper connecting sleeve, so that the rotating seat and the guide seat are damped hinged.

[0020] Preferably, the support arm has an opening at the end of the receiving cavity, the rotating base is provided with a plug that can be inserted into the opening of the receiving cavity, and the plug is installed at the end of the support arm by screws, while the limiting seat is installed on the rotating base by screws.

[0021] (III) Beneficial Effects

[0022] This utility model provides a support arm connection structure. By designing a linkage rod to connect the elastic element and the fixed wheel, the linkage rod bears and distributes the load, while the limiting seat is used to install the load-bearing elastic element. The pressure applied by the elastic element to the limiting seat is transferred to the support arm through the rotating seat, ensuring a more balanced overall force. The above structural design can improve the overall structural stability, reduce the possibility of breakage at the connection between the elastic element and the cam, and ensure safety in use. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0025] Figure 2 It shows Figure 1 The main view;

[0026] Figure 3 It shows Figure 2 AA section view;

[0027] Figure 4 It shows Figure 1 A schematic diagram of the decomposition process;

[0028] Figure 5 A schematic diagram showing the usage state of this utility model is shown;

[0029] Figure 6 A partial structural schematic diagram of this utility model is shown. Figure 1 ;

[0030] Figure 7 It shows Figure 6 A schematic diagram of the decomposition process;

[0031] Figure 8 A partial structural schematic diagram of this utility model is shown. Figure 2 ;

[0032] Figure 9 It shows Figure 8 BB cross-sectional view;

[0033] Figure 10 It shows Figure 8 A schematic diagram of the decomposition process;

[0034] Figure 11 A partial structural schematic diagram of this utility model is shown. Figure 3 ;

[0035] Figure 12 It shows Figure 11 A sectional view;

[0036] Figure 13 It shows Figure 11 A schematic diagram of the decomposition process;

[0037] Figure 14 The diagram shows the structural schematics of the support arm mechanism, clamping mechanism, and installation mechanism of this utility model.

[0038] In the diagram: 1 Support arm mechanism, 11 Guide seat, 12 Support arm, 120 Receiving cavity, 121 Rotary seat, 1210 Insert block, 13 Fixed wheel, 130 Fixed hole, 14 Elastic element, 141 Adjusting rod, 1411 Abutment block, 1412 Tool slot, 142 Spring, 143 Connecting rod, 144 Screw sleeve, 2 Limiting seat, 21 Limiting block, 210 Limiting hole, 3 Linkage rod, 31 Reinforcing rib, 4 Fastener, 41 First fastening bolt, 42 Pressure plate, 420 Movable hole, 421 Locking bolt, 422 Sleeve, 43 Stud, 44 Bushing, 441 Shoulder block, 5 Damping element, 51 Lower connecting sleeve, 52 Upper connecting sleeve, 53 Friction plate, 54 Clip shaft, 6 Clamping mechanism, 7 Installation mechanism. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0040] See appendix Figure 1 -Appendix Figure 10 A support arm connection structure is used in a support arm mechanism 1, which includes a limiting seat 2 and a linkage rod 3. The support arm mechanism 1 includes a guide seat 11, a support arm 12, a fixed wheel 13, and an elastic element 14. The support arm 12 has a receiving cavity 120 for placing the elastic element 14. The end of the support arm 12 has a rotating seat 121 that is damped and hinged to the guide seat 11. The fixed wheel 13 is located in the rotating seat 121 and is fixedly connected to the guide seat 11. The limiting seat 2 is installed in the receiving cavity 120 and connected to the rotating seat 121. The end of the limiting seat 2 away from the guide seat 11 has a limiting block 21. The limiting block 21 is connected to the head end of the elastic element 14. The tail end of the elastic element 14 is rotatably connected to the head end of the linkage rod 3. The tail end of the linkage rod 3 is rotatably connected to the fixed wheel 13.

[0041] For ease of understanding, the support arm mechanism 1 is used in the following specific way in this embodiment of the present invention:

[0042] Under normal circumstances, the elastic element 14 is in its initial state and restricts the rotation of the support arm 12, while the guide seat 11, the fixed wheel 13, the support arm 12 and the limiting seat 2 form a double rod structure to provide preload to the elastic element 14 through the linkage rod 3.

[0043] When the position of the support arm 12 needs to be adjusted, a thrust is applied to the support arm 12 to drive it to rotate around the guide seat 11. Since the linkage rod 3 connecting the end of the elastic element 14 is restricted by the fixed wheel 13 fixedly installed on the guide seat 11, the support arm 12 will stretch the elastic element 14 through the limit seat 2. At this time, the support arm 12 is released or the force applied to the support arm 12 is reduced. The elastic force of the elastic element 14, the weight of the support arm 12 itself, and the damping force between the support arm 12 and the guide seat 11 cancel each other out, so that the support arm 12 reaches the force balance and stops at the current rotation position.

[0044] In normal circumstances or when adjusting the position of the support arm 12, the force between the elastic element 14 and the fixed wheel 13 is borne and dispersed by the linkage rod 3, thereby reducing the risk of breakage. The limit seat 2 transmits the pressure applied by the elastic element 14 to the rotary seat 121, so that the elastic force, gravity, and damping force converge at the rotary seat 121 and the guide seat 11, which helps to maintain the overall dynamic balance. In the event of a breakage of the linkage rod 3, this design can also reduce the impact of the elastic element 14 on the support arm 12, reducing the possibility of damage to the support arm 12. On the other hand, since the linkage rod 3 is the main component that bears the pressure applied by the elastic element 14, it will generally break before the elastic element 14 and the fixed wheel 13. Therefore, the user only needs to replace the linkage rod 3 to complete the maintenance work, resulting in low maintenance costs.

[0045] In summary, this utility model designs a linkage rod 3 to connect the elastic element 14 and the fixed wheel 13, so that the linkage rod 3 can bear and distribute the load (such as compression, tension and bending forces), while the limiting seat 2 is used to install and support the elastic element 14. This ensures that the pressure applied by the elastic element 14 to the limiting seat 2 is transferred to the support arm 12 after being transferred through the rotating seat 121, thus ensuring a more balanced overall force. The above structural design can improve the overall structural stability, reduce the possibility of breakage at the connection between the elastic element 14 and the cam, and ensure safety in use.

[0046] See appendix Figure 3 -Appendix Figure 10 The present invention also includes a fastener 4, which includes a first fastening bolt 41 and a second fastening bolt (not shown in the figure). The fixing wheel 13 is provided with a fixing hole 130. The first fastening bolt 41 rotatably passes through the first end of the linkage rod 3 and the tail end of the elastic member 14, and the two ends of the first fastening bolt 41 abut against the linkage rod 3 and the elastic member 14 respectively. One end of the second fastening bolt rotatably passes through the tail end of the linkage rod 3 and is threadedly connected to the fixing hole 130, and the other end of the fastening bolt abuts against the linkage rod 3. The above design facilitates the disassembly of the linkage rod 3 from the elastic member 14 and the fixing wheel 13 while allowing the linkage rod 3 to be rotatably connected to the elastic member 14 and the fixing wheel 13 respectively.

[0047] See appendix Figure 3 -Appendix Figure 10The fastener 4 also includes a pressure plate 42 and a stud 43, which are used to replace the second fastener (not shown in the figure); the pressure plate 42 is mounted on the fixed wheel 13 and surrounds and abuts against the linkage rod 3, and the pressure plate 42 is provided with a movable hole 420; one end of the stud 43 is threaded to the fixed hole 130, and the other end of the stud 43 can slide through the linkage rod 3 and extend into the movable hole 420.

[0048] Specifically, when the support arm 12 rotates around the guide seat 11 to drive the elastic element 14 and the linkage rod 3 to swing, the linkage rod 3 can drive the stud 43 to rotate relative to the fixed wheel 13. Since the stud 43 is threadedly connected to the fixed hole 130, the stud 43 will also move along the axis of the movable hole 420 while rotating. This design can increase the biting force between the linkage rod 3 and the fixed wheel 13, thereby improving the stability of the support arm 12 after swinging and stopping, and can also improve wear resistance and reduce the possibility of cracking or loosening at the connection between the linkage rod 3 and the fixed wheel 13.

[0049] See appendix Figure 7 -Appendix Figure 10 A locking bolt 421 is installed on the pressure plate 42. One end of the locking bolt 421 abuts against the pressure plate 42, and the other end of the locking bolt 421 passes through the pressure plate 42 and is threadedly connected to the fixed wheel 13. A sleeve 422 is fitted on the locking bolt 421. The two ends of the sleeve 422 abut against the pressure plate 42 and the fixed wheel 13, respectively. The design of the locking bolt 421 facilitates the installation and removal of the pressure plate 42, while the design of the sleeve 422 can improve the installation stability of the pressure plate 42 and improve the pressure resistance, further preventing the connection between the linkage rod 3 and the fixed wheel 13 from loosening.

[0050] See appendix Figure 7 -Appendix Figure 10 The fastener 4 also includes a hollow bushing 44, which is installed at the movable hole 420 and has a shoulder block 441 that synchronously abuts against the pressure plate 42 and the linkage rod 3. The end of the stud 43 away from the fixed wheel 13 slidably passes through the linkage rod 3 and the shoulder block 441 and extends into the bushing 44. The swinging linkage rod 3 can drive the stud 43 to rotate and move within the bushing 44. The design of the bushing 44 can further increase the wear resistance of the stud 43. Users can also drip lubricating oil into the bushing 44 to reduce the friction between the bushing 44 and the stud 43, thereby extending their service life.

[0051] See appendix Figure 7 -Appendix Figure 10The tail end of the linkage rod 3 is equipped with a reinforcing rib 31, and the shoulder block 441 abuts against the pressure plate 42 and the reinforcing rib 31. The end of the stud 43 away from the fixed wheel 13 can slide through the linkage rod 3, the reinforcing rib 31 and the shoulder block 441 and extend into the bushing 44. The swinging linkage rod 3 can drive the stud 43 to rotate and move within the bushing 44. The design of the reinforcing rib 31 can improve the load-bearing capacity and load-distribution capacity of the linkage rod 3, thereby reducing the possibility of the linkage rod 3 breaking and effectively extending the service life of the linkage rod 3.

[0052] See appendix Figure 8 -Appendix Figure 10 The linkage rod 3 has a bend design in the middle so that the first end of the linkage rod 3 is offset from the last end of the linkage rod 3; this design can disperse the pressure applied to the linkage rod 3 by the elastic element 14, and further improve the load-bearing capacity and load-distribution capacity of the linkage rod 3.

[0053] See appendix Figure 7 -Appendix Figure 10 The limiting block 21 is provided with a limiting hole 210. The first end of the elastic element 14 is installed at the limiting hole 210. The fixing hole 130 is misaligned with the limiting hole 210 so that the elastic element 14 is installed at an angle in the receiving cavity 120. This design can ensure that the elastic element 14 is always in a pre-tight state during the swing of the support arm 12, thereby ensuring that the support arm 12 can be stably fixed in the current position after swinging.

[0054] It should be noted that after the elastic element 14 is installed at an angle, the elastic element 14 will be stretched only when the support arm 12 swings in the tilt direction. Therefore, the manufacturer can flexibly preset the initial position of the support arm 12 according to the requirements to determine the actual range of motion of the support arm 12.

[0055] See appendix Figure 3 -Appendix Figure 10 The elastic element 14 includes an adjusting rod 141, a spring 142, and a connecting rod 143. The adjusting rod 141 is mounted on the spring 142 as the first end of the elastic element 14, and the end of the adjusting rod 141 away from the spring 142 passes through the limiting hole 210 and has a stop block 1411 that abuts against the limiting block 21. The connecting rod 143 is mounted on the spring 142 as the last end of the elastic element 14, and the end of the connecting rod 143 away from the spring 142 is rotatably connected to the linkage rod 3.

[0056] Specifically, under normal circumstances, the spring 142 is in its initial state, and at this time, the abutment 1411 abuts against the limiting block 21 to pre-tighten the support arm 12. During the swing of the support arm 12 around the guide seat 11, the position of the limiting block 21 will change relative to the fixed wheel 13, so that the abutment 1411 has a tendency to move inward toward the receiving cavity 120. However, under the restriction of the limiting block 21, the abutment 1411 cannot move, so it will drive the adjusting rod 141 to move outward, so as to drive the spring 142 to stretch and deform, thereby making the support arm 12 reach the force balance and stop at the current rotation position.

[0057] It should be noted that manufacturers may also use rubber strips, elastic plastic blocks, or other elastic components with deformation and recovery capabilities to replace spring 142, and this utility model does not impose any restrictions on this.

[0058] See appendix Figure 3 -Appendix Figure 6 The load-bearing capacity of the support arm 12 is mainly determined by the elastic force of the spring 142, which is limited by its own tension. In order to facilitate the adjustment of the tension of the spring 142, the elastic element 14 in this utility model also includes a threaded sleeve 144. The threaded sleeve 144 is installed on the spring 142 and threadedly connected to the adjusting rod 141. The adjusting rod 141 also rotates with the limiting hole 210.

[0059] Specifically, rotating the adjusting rod 141 in the forward direction causes the threaded sleeve 144 to gradually move towards the limiting hole 210, which stretches the spring 142, increases the elastic force of the spring 142, and thus increases the load-bearing capacity of the support arm 12. Similarly, rotating the adjusting rod 141 in the reverse direction causes the threaded sleeve 144 to gradually move away from the limiting hole 210, which loosens the spring 142, reduces the elastic force of the spring 142, and thus facilitates the swinging of the support arm 12.

[0060] After loosening the spring 142, it is necessary to ensure that the stop block 1411 maintains normal contact with the limit block 21 so that the spring 142 remains associated with the support arm 12 and ensures that the spring 142 can continuously restrict the support arm 12.

[0061] See appendix Figure 5 -Appendix Figure 10 The stop block 1411 can be designed as a hexagon (not shown in the figure), or the stop block 1411 can be provided with tool slots 1412 such as "slotted" or "cross" to facilitate the user to rotate the adjusting rod 141 with operating tools such as screwdrivers.

[0062] See appendix Figure 10 -Appendix Figure 13The guide seat 11 and the rotating seat 121 can be configured as an interference fit, or have rotational damping by setting other structures. This utility model does not limit this. For ease of understanding, this embodiment also includes a damping element 5, which includes a lower connecting sleeve 51, an upper connecting sleeve 52, a friction plate 53, and a retaining shaft 54. The lower connecting sleeve 51 is installed on the guide seat 11, and the retaining shaft 54 ​​is fixedly installed on the lower connecting sleeve 51. One end of the retaining shaft 54 ​​extends into the rotating seat 121 and is fixedly connected to the fixed wheel 13. The upper connecting sleeve 52 is installed on the rotating seat 121 and is rotatably sleeved on the retaining shaft 54. The friction plate 53 is fixedly installed on the retaining shaft 54 ​​and abuts against the upper connecting sleeve 52, so that the rotating seat 121 and the guide seat 11 are damped hinged.

[0063] Specifically, based on the above description, the lower connecting sleeve 51, the retaining shaft 54, the friction plate 53, and the fixed wheel 13 are all directly or indirectly mounted on the guide seat 11, while the upper connecting sleeve 52 is mounted on the rotating seat 121 and abuts against the friction plate 53 while rotating around the retaining shaft 54. Therefore, when the swing arm 12 drives the rotating seat 121, the upper connecting sleeve 52 rotates around the retaining shaft 54 ​​and rubs against the friction plate 53 to form resistance, so that the rotating seat 121 and the guide seat 11 are damped hinged. Compared with the conventional hinge method, this design can directly restrict the fixed wheel 13 while connecting the guide seat 11 and the rotating seat 121, so that the overall structure is tightly linked, which can reduce the space occupation, reduce the volume of the guide seat 11 and the rotating seat 121, and improve the stability of use.

[0064] See appendix Figure 1 -Appendix Figure 5 The support arm 12 has an opening at the end of the receiving cavity 120. The rotating base 121 is provided with a plug 1210 that can be inserted into the opening of the receiving cavity 120. The plug 1210 is installed at the end of the support arm 12 by screws. The limiting seat 2 is installed on the rotating base 121 by screws. This design allows the user to remove the limiting seat 2, elastic element 14 and other components from the receiving cavity 120 when disassembling the rotating base 121, providing convenience for disassembly and assembly, and facilitating early assembly and later maintenance.

[0065] See appendix Figure 14 The end of the support arm mechanism 1 away from the guide seat 11 can be connected to the guide seat 11 of another support arm mechanism 1, or to the clamping mechanism 6 used to clamp mobile phones, tablets and other devices. This utility model does not limit this. For ease of understanding, the following embodiments are given in this utility model.

[0066] Specifically, two support arm mechanisms 1 are preset, referred to as the first support arm mechanism 1 and the second support arm mechanism 1. The end of the first support arm mechanism 1 away from the guide seat 11 is connected to the guide seat 11 of the second support arm mechanism 1 so that the two support arm mechanisms 1 are connected and formed. The first support arm mechanism 1 and the second support arm mechanism 1 are both provided with limit seats 2 and linkage rods 3 so that the connection part of the two has a swing function. The end of the second support arm mechanism 1 away from the guide seat 11 is connected to the clamping mechanism 6 so that the angle range of the clamped equipment can be adjusted.

[0067] In summary, this support arm connection structure can be used in one or more support arm mechanisms 1, or in support arm mechanism 1 and clamping mechanism 6. Due to the variety of applications, this utility model does not impose any restrictions on it. Since its function is to solve the problem of easy breakage during frequent adjustment of swing position, it will not be described again here. On the other hand, the clamping mechanism 6 is an existing structure, so this utility model does not impose any restrictions on it.

[0068] Furthermore, an installation mechanism 7 can be provided on the guide seat 11 to install the support arm mechanism 1 onto a flat surface such as a table, bedside table, or wall for use. There are various types of installation mechanisms 7, and they are existing structures. This utility model does not limit them.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A support arm connection structure, used in a support arm mechanism (1), characterized in that, Including the limit seat (2) and the linkage rod (3): The support arm mechanism (1) includes a guide seat (11), a support arm (12), a fixed wheel (13), and an elastic element (14). The support arm (12) has a cavity (120) for placing the elastic element (14). The end of the support arm (12) has a rotating seat (121) that is damped and hinged to the guide seat (11). The fixed wheel (13) is located in the rotating seat (121) and is fixedly connected to the guide seat (11). The elastic element (14) includes an adjusting rod (141), a spring (142), and a connecting rod (143); the adjusting rod (141) is mounted on the spring (142) as the head end of the elastic element (14); the connecting rod (143) is mounted on the spring (142) as the tail end of the elastic element (14); The limiting seat (2) is installed in the receiving cavity (120) and connected to the rotating seat (121). The limiting seat (2) has a limiting block (21) at one end away from the guide seat (11). The limiting block (21) is connected to the head end of the elastic element (14). The tail end of the elastic element (14) is rotatably connected to the head end of the linkage rod (3). The tail end of the linkage rod (3) is rotatably connected to the fixed wheel (13).

2. A support arm connection structure according to claim 1, wherein It also includes fasteners (4), which include a first fastener (41) and a second fastener. The fixing wheel (13) is provided with a fixing hole (130). The first fastener (41) rotatably passes through the first end of the linkage rod (3) and the tail end of the elastic element (14), and the two ends of the first fastener (41) abut against the linkage rod (3) and the elastic element (14) respectively. One end of the second fastener rotatably passes through the tail end of the linkage rod (3) and is threadedly connected to the fixing hole (130), and the other end of the second fastener abuts against the linkage rod (3).

3. A support arm connection structure according to claim 2, wherein The fastener (4) further includes a pressure plate (42) and a stud (43), the pressure plate (42) and the stud (43) being used to replace the second fastening bolt; the pressure plate (42) is mounted on the fixed wheel (13) and surrounds and abuts against the linkage rod (3), and the pressure plate (42) is provided with a movable hole (420); one end of the stud (43) is threadedly connected to the fixed hole (130), and the other end of the stud (43) is slidably passed through the linkage rod (3) and extends into the movable hole (420), swinging the linkage rod (3) can drive the stud (43) to rotate and move within the movable hole (420).

4. A support arm connection structure according to claim 3, wherein A locking bolt (421) is installed on the pressure plate (42). One end of the locking bolt (421) abuts against the pressure plate (42), and the other end of the locking bolt (421) passes through the pressure plate (42) and is threadedly connected to the fixed wheel (13). A sleeve (422) is fitted on the locking bolt (421), and both ends of the sleeve (422) abut against the pressure plate (42) and the fixed wheel (13) respectively.

5. The support arm connection structure of claim 3, wherein The fastener (4) also includes a hollow bushing (44) which is installed at the movable hole (420) and has a shoulder block (441) that synchronously abuts against the pressure plate (42) and the linkage rod (3). The end of the stud (43) away from the fixed wheel (13) slidably passes through the linkage rod (3) and the shoulder block (441) and extends into the bushing (44). Swinging the linkage rod (3) can drive the stud (43) to rotate and move within the bushing (44).

6. A support arm connection structure according to claim 5, wherein The linkage rod (3) is equipped with a reinforcing rib (31) at its tail end. The shoulder block (441) abuts against the pressure plate (42) and the reinforcing rib (31). The stud (43) is slidably passed through the linkage rod (3), the reinforcing rib (31) and the shoulder block (441) and extends into the bushing (44). Swinging the linkage rod (3) can drive the stud (43) to rotate and move within the bushing (44).

7. The support arm connection structure of claim 1, wherein The linkage rod (3) is designed with a bend in the middle so that the first end of the linkage rod (3) is offset from the last end of the linkage rod (3).

8. A support arm connection structure according to any one of claims 2 to 6, wherein The limiting block (21) is provided with a limiting hole (210), and the first end of the elastic element (14) is installed at the limiting hole (210). The fixing hole (130) is designed to be offset from the limiting hole (210) so that the elastic element (14) is installed at an angle in the receiving cavity (120).

9. A support arm connection structure according to claim 8, wherein The end of the adjusting rod (141) away from the spring (142) passes through the limiting hole (210) and has a stop block (1411) that abuts against the limiting block (21); the end of the connecting rod (143) away from the spring (142) is rotatably connected to the linkage rod (3).

10. The support arm connection structure of claim 8, wherein The elastic element (14) also includes a threaded sleeve (144), which is mounted on the spring (142) and threadedly connected to the adjusting rod (141). The adjusting rod (141) is also rotatably engaged with the limiting hole (210).

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