CN221263844U - Support arm mechanism and mobile phone support - Google Patents

Abstract

The support arm mechanism comprises a guide seat, a support arm, a fixed wheel and an elastic piece; the inside of the support arm is provided with a containing cavity, one end of the support arm is provided with a limiting block, the other end of the support arm is provided with a rotating block, and the rotating block is in damping hinge joint with the guide seat; the fixed wheel is arranged in the rotating block and is fixed with the guide seat; the elastic piece is arranged in the accommodating cavity, one end of the elastic piece is rotationally connected with the fixed wheel, and the other end of the elastic piece is connected with the limiting block; when the support arm rotates around the guide seat, the fixed wheel keeps a fixed state, and the elastic piece deforms under the action of the limiting block, so that the support arm is in stress balance and is stopped; therefore, the elastic piece is arranged in the accommodating cavity, so that the service life of the elastic piece can be ensured; the fixed wheel, the limiting block and the elastic piece are matched, so that the whole structure is simple, and the use stability is improved; the mobile phone support comprises a support arm mechanism and a swing arm mechanism which is the same as the support arm mechanism in structure, so that the mobile phone support has the advantages.

Description

Support arm mechanism and mobile phone support

Technical Field

The utility model belongs to the technical field of bracket accessories, and particularly relates to a support arm mechanism and a mobile phone bracket.

Background

With the increasing popularity of mobile phones, more and more people use the mobile phones to watch drama or live broadcast, so that the use rate of the mobile phone bracket is also higher and higher; the position and the angle of the mobile phone are mostly adjusted through the hose, and the hose is easy to deform in the use process, so that the mobile phone cannot be stably placed.

Therefore, the mobile phone support shown in the figure 1 appears in the market, and the mobile phone support achieves stress balance by utilizing the elastic deformation of the spring, so that each support arm can be stopped at the current position after swinging, the movable adjusting range of the support is increased, and the mobile phone support can adapt to the use requirements of various scenes. But during actual use it was found to have the following disadvantages:

Firstly, the spring is exposed to the outside, so that the service life is easily shortened due to the influence of external factors;

Secondly, overall structure is complicated, and stability in use is relatively poor.

Disclosure of utility model

(One) solving the technical problems

The utility model provides a support arm mechanism and a mobile phone support, which can solve the problems in the background art.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions:

A supporting arm mechanism comprises a guide seat, a supporting arm, a fixed wheel and an elastic piece; the support arm is internally provided with a containing cavity, one end of the support arm is provided with a limiting block, the other end of the support arm is provided with a rotating block, and the rotating block is in damping hinge joint with the guide seat; the fixed wheel is arranged in the rotating block and is fixed with the guide seat; the elastic piece is arranged in the accommodating cavity, one end of the elastic piece is rotationally connected with the fixed wheel, and the other end of the elastic piece is connected with the limiting block;

When the support arm rotates around the guide seat, the fixed wheel keeps a fixed state, and the elastic piece deforms under the action of the limiting block, so that the support arm is in stress balance and is stopped.

Preferably, the damping device further comprises a damping piece, wherein the damping piece comprises an upper fixing sleeve, a lower fixing sleeve, a friction plate and a clamping shaft; the upper fixing sleeve is arranged on the guide seat, the clamping shaft is fixedly arranged on the upper fixing sleeve, and one end of the clamping shaft extends into the rotating block and is fixedly connected with the fixed wheel; the lower fixing sleeve is arranged on the rotating block and is rotatably sleeved on the clamping shaft; the friction plate is fixedly arranged on the clamping shaft and is abutted against the lower fixing sleeve, so that the rotating block is in damping hinge connection with the guide seat.

Preferably, the fixed wheel is provided with a rotating hole, the limiting block is provided with a limiting hole, the rotating hole and the limiting hole are staggered, one end of the elastic piece is rotationally connected with the rotating hole, and the other end of the elastic piece is installed in the limiting hole, so that the elastic piece is obliquely installed in the accommodating cavity.

Preferably, the elastic piece comprises a connecting rod, a spring and an adjusting rod, and a movable groove for connecting the limiting hole is formed in the limiting block; the connecting rod is arranged at the first end of the spring and is rotationally connected with the rotating hole; the head end of the adjusting rod is arranged at the second end of the spring, the tail end of the adjusting rod penetrates through the limiting hole to the movable groove, and an abutting block abutting against the bottom side of the movable groove is arranged at the tail end of the adjusting rod.

Preferably, the elastic piece further comprises a screw block, the screw block is installed at the second end of the spring and is in threaded connection with the head end of the adjusting rod, and the adjusting rod is further in running fit with the limiting hole.

Preferably, the limiting block is further provided with an operation port for connecting the movable groove with the outside, and the abutting block is provided with a tool groove.

Preferably, the limiting block and the rotating block are respectively and detachably arranged at two ends of the support arm; the support arm comprises a top plate and a bottom plate, and the top plate and the bottom plate are mutually assembled and enclosed to form the accommodating cavity.

Preferably, the rotary block and the limiting block are respectively provided with a screw hole, the top plate and the bottom plate are respectively provided with a through hole, and the through holes correspond to the screw hole design; the screw penetrates through the through hole and then is connected with the screw hole in a threaded mode.

A mobile phone support comprises a support arm mechanism, a swing arm mechanism, a fastening mechanism and a clamping mechanism; the structure of the swing arm mechanism is the same as that of the support arm mechanism, and a guide seat of the swing arm mechanism is arranged on a limiting block of the support arm mechanism so that the swing arm mechanism and the support arm mechanism are connected and formed; the fastening mechanism is arranged on the guide seat of the supporting arm mechanism, and the clamping mechanism is arranged on the limiting block of the swing arm mechanism.

Preferably, the fastening means comprises a fastening plate mounted on the guide of the support arm means and a fastening peg which can penetrate the fastening plate and fix it to a plane.

Preferably, the clamping mechanism comprises a connecting seat, a clamping arm and a clamping piece; the connecting seat is detachably arranged on a limiting block of the swing arm mechanism, and the clamping arm is in damping hinge joint with the connecting seat; the clamping piece is arranged on the clamping arm and used for clamping the mobile phone.

(III) beneficial effects

According to the support arm mechanism and the mobile phone support, the elastic element is arranged in the accommodating cavity of the support arm, so that the influence of external factors on the elastic element can be avoided, and the service life of the elastic element is effectively ensured; on the other hand, the fixed wheel and the limiting block are matched with the pre-tightening elastic piece, so that the structure is simple; the damping hinging design of the rotating block and the guide seat can provide certain resistance for the support arm, so that the operation hand feeling can be improved, the support arm can be quickly balanced after swinging, and the stability of the support arm is improved;

The mobile phone support comprises a fastening mechanism, a support arm mechanism, a swing arm mechanism and a clamping mechanism, wherein the fastening mechanism is arranged on the support arm mechanism, and the clamping mechanism is arranged on the swing arm mechanism; the swing arm mechanism and the support arm mechanism have the same structure and are mutually connected and formed, so that the mobile phone has the advantages that a user can conveniently adjust the position of the mobile phone according to requirements.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and together with the embodiments of the utility model and do not constitute a limitation to the utility model, and in which:

fig. 1 shows a schematic structural diagram of a conventional mobile phone holder;

FIG. 2 shows a schematic diagram of the overall structure of the present utility model;

FIG. 3 shows a second overall schematic of the present utility model;

FIG. 4 is a schematic view of the support arm mechanism of the present utility model;

FIG. 5 shows an exploded view of FIG. 4;

FIG. 6 shows an internal schematic view of the support arm mechanism of the present utility model;

FIG. 7 shows a cross-sectional view A-A of FIG. 6;

FIG. 8 shows an enlarged view at A in FIG. 7;

FIG. 9 is a schematic view showing the use of the support arm mechanism of the present utility model;

FIG. 10 shows a schematic diagram of the connection of the guide and the rotor block of the present utility model;

fig. 11 shows a front view of fig. 10;

FIG. 12 shows a cross-sectional view B-B of FIG. 11;

FIG. 13 shows an exploded view of FIG. 10;

Fig. 14 shows an exploded view of fig. 10.

In the figure: the device comprises a guide seat 1, a support arm 2, a holding cavity 20, a top plate 201, a bottom plate 202, a 20d through hole, a 21 limiting block, a 210 limiting hole, a 211 movable groove, a 212 operation port, a 2d screw hole, a 22 rotating block, a3 fixed wheel, a 30 rotating hole, a 4 elastic piece, a 41 connecting rod, a 42 spring, a 43 adjusting rod, a 431 supporting block, a 4310 tool groove, a 44 screw block, a5 damping piece, a 51 upper fixed sleeve, a 52 lower fixed sleeve, a 53 friction plate, a 54 clamping shaft, a 6 screw, a 7 swing arm mechanism, an 8 fastening mechanism, a 81 fastening plate, a 82 fastening bolt, a 9 clamping mechanism, a 91 connecting seat, a 92 clamping arm, a 93 clamping piece, a k1 first clamping block and a k2 second clamping block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 4-9, a support arm mechanism comprises a guide seat 1, a support arm 2, a fixed wheel 3 and an elastic piece 4; the inside of the support arm 2 is provided with a containing cavity 20, one end of the support arm 2 is provided with a limiting block 21, the other end of the support arm 2 is provided with a rotating block 22, and the rotating block 22 is in damping hinge joint with the guide seat 1; the fixed wheel 3 is arranged in the rotating block 22 and is fixed with the guide seat 1; the elastic piece 4 is arranged in the accommodating cavity 20, one end of the elastic piece 4 is rotationally connected with the fixed wheel 3, and the other end of the elastic piece 4 is connected with the limiting block 21; when the support arm 2 rotates around the guide seat 1, the fixed wheel 3 keeps a fixed state, and the elastic piece 4 deforms under the action of the limiting block 21, so that the support arm 2 reaches the stress balance.

For easy understanding, in the embodiment of the present utility model, the support arm mechanism is used in the following manner:

Conventionally, the elastic member 4 is in an initial state and limits the rotation of the support arm 2, and the guide seat 1, the fixed wheel 3, the support arm 2 and the limiting block 21 form a double-link 41 structure to provide a pre-tightening force for the elastic member 4;

When a user applies pressure to the support arm 2, the support arm 2 is driven to rotate around the guide seat 1, and one end of the elastic piece 4 is limited by the fixed wheel 3 fixedly arranged on the guide seat 1, so that the limiting block 21 synchronously rotating with the support arm 2 stretches the elastic piece 4 to deform the elastic piece 4, at the moment, the support arm 2 is loosened or the pressure applied to the support arm 2 is reduced, the elasticity, the damping force and the gravity of the support arm 2 are mutually eliminated, so that the support arm 2 is balanced in stress and is positioned and stopped at the current rotation position.

With respect to the principle of use of the support arm mechanism, reference is made to fig. 1, which is not further elaborated on in the present utility model, since it is also common in the art.

In summary, compared with the existing products, the elastic element 4 is arranged in the accommodating cavity 20 of the support arm 2, so that the elastic element 4 is prevented from being influenced by external factors, and the service life of the elastic element 4 is effectively ensured; on the other hand, through design tight pulley 3 and stopper 21 cooperation pretension elastic component 4, the structure is comparatively simple, and the articulated design of damping of commentaries on classics piece 22 and guide holder 1 can provide certain resistance for support arm 2, can improve the operation feel, can provide the pretightning force for elastic component 4 again for can reach the equilibrium fast after support arm 2 swings, improve the stability of support arm 2.

Referring to fig. 9 to 14, regarding the damping hinge connection between the guide seat 1 and the rotating block 22, for example, a shaft body and a shaft hole which are in transition fit may be designed on the guide seat 1 and the rotating block 22, which is not limited in the present utility model, but in order to make the overall structure more compact, the present utility model further includes a damping member 5, where the damping member 5 includes an upper fixing sleeve 51, a lower fixing sleeve 52, a friction plate 53 and a clamping shaft 54; the upper fixed sleeve 51 is arranged on the guide seat 1, the clamping shaft 54 is fixedly arranged on the upper fixed sleeve 51, and one end of the clamping shaft 54 extends into the rotating block 22 and is fixedly connected with the fixed wheel 3; the lower fixed sleeve 52 is arranged on the rotating block 22, and the lower fixed sleeve 52 is rotatably sleeved on the clamping shaft 54; the friction plate 53 is fixedly mounted on the clamping shaft 54 and abuts against the lower fixing sleeve 52.

Specifically, as can be seen from the above description, the upper fixing sleeve 51, the clamping shaft 54, the friction plate 53 and the fixed pulley 3 are all directly or indirectly mounted on the guide seat 1, while the lower fixing sleeve 52 is mounted on the rotating block 22 and abuts against the friction plate 53 while rotating around the clamping shaft 54; therefore, when the swing support arm 2 drives the rotating block 22, the lower fixed sleeve 52 rotates around the clamping shaft 54 and rubs with the friction plate 53 to form resistance, so that the rotating block 22 is in damping hinge connection with the guide seat 1; compared with the conventional hinging mode, the design can directly limit the fixed wheel 3 while connecting the guide seat 1 and the rotating block 22, so that the whole structure is tightly linked, the occupied space can be reduced, the volumes of the guide seat 1 and the rotating block 22 can be reduced, and the use stability can be effectively improved.

Referring to fig. 7-11, a rotation hole 30 is formed in the fixed wheel 3, a limit hole 210 is formed in the limit block 21, the rotation hole 30 and the limit hole 210 are staggered, one end of the elastic piece 4 is rotationally connected with the rotation hole 30, and the other end of the elastic piece 4 is installed in the limit hole 210, so that the elastic piece 4 is obliquely installed in the accommodating cavity 20; the design can ensure that the elastic piece 4 is always in a pre-tightening state in the swinging process of the support arm 2, so that the support arm 2 can be stably fixed at the current position after swinging.

It should be noted that, as shown in fig. 9, after the elastic member 4 is obliquely installed, if and only if the support arm 2 swings in the oblique direction, the elastic member 4 will be stretched, so that the manufacturer can flexibly preset the initial position of the support arm 2 according to the requirement, so as to ensure the movable range of the support arm 2.

Referring to fig. 5 to 8, the elastic member 4 includes a connecting rod 41, a spring 42 and an adjusting rod 43, and a movable slot 211 for connecting the limiting hole 210 is provided in the limiting block 21; the connecting rod 41 is installed at a first end of the spring 42 and is rotatably connected with the rotary hole 30; the head end of the adjusting rod 43 is mounted at the second end of the spring 42, the tail end of the adjusting rod 43 penetrates through the limiting hole 210 into the movable groove 211, and an abutting block 431 abutting against the bottom side of the movable groove 211 is arranged at the tail end of the adjusting rod 43.

Specifically, in the conventional case, the spring 42 is in an initial state, and the abutment 431 abuts against the bottom side of the movable slot 211 at this time;

In the process of swinging the support arm 2 around the guide seat 1, the position of the limiting block 21 is changed, so that the abutting block 431 has a tendency to move inwards towards the accommodating cavity 20, but under the limitation of the bottom side of the movable groove 211, the abutting block 431 cannot move along the limiting hole 210, namely, the relative position of the adjusting rod 43 and the limiting block 21 is not changed; in this case, the spring 42 is pulled by the adjusting lever 43 to be stretched and deformed, so that the arm 2 is balanced in force and is positioned to be stopped at the current rotation position.

It should be noted that rubber strips, plastic blocks having elasticity, etc. may be used instead of the spring 42 in the present utility model, which is not limited in the present utility model.

Referring to fig. 7-8, in actual use, the bearing capacity of the support arm 2 is mainly determined by the elasticity of the spring 42, and the elasticity of the spring 42 is limited by the tension of the spring 42, so as to facilitate adjusting the tension of the spring 42, in the present utility model, the elastic member 4 further includes a screw block 44, where the screw block 44 is installed at the second end of the spring 42 and is in threaded connection with the head end of the adjusting rod 43, and the adjusting rod 43 is further in rotational fit with the limiting hole 210.

Specifically, when the spring 42 needs to be tightly adjusted, the adjusting lever 43 is rotated forward, so that the screw block 44 gradually moves towards the direction of the limiting hole 210, that is, the spring 42 can be stretched, the elasticity of the spring 42 is improved, and the bearing capacity of the support arm 2 is further increased.

Similarly, when the spring 42 needs to be loosened, the adjusting rod 43 is reversely rotated, so that the screw block 44 is gradually far away from the limiting hole 210, the spring 42 can be loosened, the elasticity of the spring 42 is reduced, the bearing capacity of the support arm 2 is further reduced, and a user can conveniently swing the support arm 2.

It should be noted that after the spring 42 is loosened, the abutment 431 must be guaranteed to normally abut against the bottom side of the movable slot 211, so as to prevent the adjusting lever 43 from disengaging from the limiting block 21, and ensure that the spring 42 is closely associated with the support arm 2, so that the spring 42 can continuously limit the support arm 2.

Referring to fig. 7-8, the limiting block 21 is further provided with an operation opening 212 for connecting the movable slot 211 with the outside, and the supporting block 431 is provided with a tool slot 4310.

Specifically, the operation opening 212 is designed to facilitate the operation tool such as a screw pen to extend into the movable slot 211, and the tool slot 4310 is adapted to the operation tool (not shown), so that a user can use the operation tool to rotate the adjustment lever 43, thereby adjusting the tightness of the spring 42.

It should be noted that the tool slot 4310 may be various, for example, a "straight" slot, a "cross" slot, a "hexagonal" slot, etc. to adapt to different kinds of operation tools, which is not limited in the present utility model.

Referring to fig. 4-6, a limiting block 21 and a rotating block 22 are respectively detachably arranged at two ends of the support arm 2 so as to facilitate disassembly and assembly; the support arm 2 comprises a top plate 201 and a bottom plate 202, the top plate 201 and the bottom plate 202 are mutually assembled and enclosed to form a containing cavity 20, and the design is convenient for opening the containing cavity 20 to assemble and disassemble the elastic piece 4; therefore, the design improves the convenience of dismounting the support arm mechanism and facilitates assembly and maintenance.

Referring to fig. 4-6, further, the utility model includes a screw 6, screw holes 2d are respectively provided on the rotating block 22 and the limiting block 21, through holes 20d are respectively provided on the top plate 201 and the bottom plate 202, and the through holes 20d are designed corresponding to the screw holes 2 d; the screw 6 penetrates through the through hole 20d and is connected with the screw hole 2d in a threaded mode, so that the top plate 201 and the bottom plate 202 are assembled into the support arm 2, and meanwhile the limiting block 21 and the rotating block 22 are respectively arranged at two ends of the support arm 2.

Therefore, the fitting design of the screw 6, the through hole 20d and the screw hole 2d can improve the assembling convenience, shorten the assembling time and improve the disassembling and assembling efficiency.

It should be noted that, in the assembly and disassembly of the stopper 21 and the rotation block 22, and the assembly of the top plate 201 and the bottom plate 202, the manners of fastening, bonding, etc. may be adopted, and this is not limited to the present utility model, and is not exemplified one by one.

Referring to fig. 2-3, a mobile phone bracket comprises a supporting arm mechanism, a swing arm mechanism 7, a fastening mechanism 8 and a clamping mechanism 9; the swing arm mechanism 7 has the same structure as the support arm mechanism, and the guide seat 1 of the swing arm mechanism 7 is arranged on the limiting block 21 of the support arm mechanism so as to enable the swing arm mechanism 7 to be connected with the support arm mechanism for forming; the fastening mechanism 8 is installed on the guide seat 1 of the supporting arm mechanism, and the clamping mechanism 9 is installed on the limiting block 21 of the swing arm mechanism 7.

Specifically, when in use, the fastening mechanism 8 is mounted on a table, a bed head, a wall surface and other plane positions, so that the guide seat 1 of the support arm mechanism is fixed; after the mobile phone is fixed through the clamping mechanism 9, the positions of the swing arm mechanism 7 and the support arm mechanism are adjusted according to the requirements, so that the mobile phone can be positioned and stopped at a specific position.

Because swing arm mechanism 7 and support arm mechanism structure are the same, and interconnect shaping, therefore swing arm mechanism 7 also possesses support arm mechanism's advantage, and both combine the use, can make the holistic life extension of cell phone stand to the holistic stability in use of cell phone stand has been improved.

Referring to fig. 1-6, further, in order to facilitate the mounting of the guide seat 1 of the swing arm mechanism 7 on the limiting block 21 of the support arm mechanism, in the present utility model, a first clamping block k1 is disposed on the guide seat 1 of the swing arm mechanism 7, and the first clamping block k1 may be clamped with the operation opening 212 on the limiting block 21 of the support arm mechanism.

Referring to fig. 1 to 6, the fastening mechanism 8 includes a fastening plate 81 and a fastening bolt 82, the fastening plate 81 is mounted on the guide seat 1 of the support arm mechanism, and the fastening bolt 82 penetrates the fastening plate 81 and fixes it on a table, a bed head, a wall surface, or the like.

It should be noted that, in addition to the fastening plate 81 and the fastening bolt 82, the fastening mechanism 8 of the present utility model may also be a clamping jaw, a suction cup, or the like, which is not limited in the present utility model due to various kinds and common in the art.

Referring to fig. 1 to 6, the clamping mechanism 9 includes a connecting seat 91, a clamping arm 92, and a clamping member 93; the connecting seat 91 is detachably arranged on the limiting block 21 of the swing arm mechanism 7, and the clamping arm 92 is in damping hinge joint with the connecting seat 91; the clamp 93 is mounted on the clamp arm 92.

Specifically, the clamping arm 92 is used for fixing the clamping piece 93, and the clamping piece 93 is used for clamping and fixing the mobile phone; the clamp arm 92 is in damping hinge connection with the connecting seat 91, so as to facilitate fine adjustment of the swing angle of the mobile phone, thereby further improving the operation convenience.

It should be noted that, regarding the damping hinge connection manner of the clamping arm 92 and the connecting seat 91, reference may be made to the connection manner of the guide seat 1 and the rotating block 22, which is not described in the present utility model; the clamping member 93 is various and belongs to the prior art, so the utility model is not limited thereto; for ease of understanding, the present utility model is illustrated in the drawings of the specification by taking a structure as an example.

Referring to fig. 1 to fig. 6, further, in order to facilitate the connection seat 91 to be mounted on the limiting block 21 of the swing arm mechanism 7, in the present utility model, a second clamping block k2 is disposed on the connection seat 91, and the second clamping block k2 can be clamped with the operation opening 212 on the limiting block 21 of the swing arm mechanism 7.

It should also be noted that while embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and principles of the present application.

Claims (10)

1. A support arm mechanism, comprising:

a guide seat (1);

The support arm (2), the inside accommodation chamber (20) that is equipped with of support arm (2), stopper (21) are installed to support arm (2) one end, the other end of support arm (2) is installed and is changeed piece (22), change piece (22) with guide holder (1) damping articulates;

The fixed wheel (3) is arranged in the rotating block (22) and is fixed with the guide seat (1);

The elastic piece (4), the elastic piece (4) is in the accommodating cavity (20), one end of the elastic piece (4) is rotationally connected with the fixed wheel (3), and the other end of the elastic piece (4) is connected with the limiting block (21);

When the support arm (2) rotates around the guide seat (1), the fixed wheel (3) keeps a fixed state, and the elastic piece (4) deforms under the action of the limiting block (21), so that the support arm (2) is in stress balance and is stopped.

2. A support arm mechanism according to claim 1, further comprising a damping member (5), said damping member (5) comprising an upper stationary sleeve (51), a lower stationary sleeve (52), a friction plate (53) and a clamping shaft (54); the upper fixing sleeve (51) is arranged on the guide seat (1), the clamping shaft (54) is fixedly arranged on the upper fixing sleeve (51), and one end of the clamping shaft (54) extends into the rotating block (22) and is fixedly connected with the fixed wheel (3); the lower fixing sleeve (52) is arranged on the rotating block (22), and the lower fixing sleeve (52) is rotatably sleeved on the clamping shaft (54); the friction plate (53) is fixedly arranged on the clamping shaft (54) and abuts against the lower fixing sleeve (52), so that the rotating block (22) is in damping hinge connection with the guide seat (1).

3. A support arm mechanism according to claim 1, wherein the fixed wheel (3) is provided with a rotation hole (30), the limiting block (21) is provided with a limiting hole (210), the rotation hole (30) and the limiting hole (210) are designed in a dislocation manner, one end of the elastic member (4) is rotationally connected with the rotation hole (30), and the other end of the elastic member (4) is installed in the limiting hole (210), so that the elastic member (4) is obliquely installed in the accommodating cavity (20).

4. A support arm mechanism according to claim 3, characterized in that the elastic member (4) comprises a connecting rod (41), a spring (42) and an adjusting rod (43), and a movable groove (211) for connecting the limit hole (210) is arranged in the limit block (21); the connecting rod (41) is arranged at the first end of the spring (42) and is rotationally connected with the rotating hole (30); the head end of the adjusting rod (43) is arranged at the second end of the spring (42), the tail end of the adjusting rod (43) penetrates through the limiting hole (210) to the inside of the movable groove (211), and an abutting block (431) abutting against the bottom side of the movable groove (211) is arranged at the tail end of the adjusting rod (43).

5. A support arm mechanism according to claim 4, wherein the resilient member (4) further comprises a screw (44), the screw (44) being mounted at the second end of the spring (42) and being threadedly connected to the head end of the adjustment rod (43), the adjustment rod (43) further being in rotational engagement with the limiting aperture (210).

6. The support arm mechanism according to claim 5, wherein the stopper (21) is further provided with an operation port (212) for connecting the movable slot (211) to the outside, and the abutment (431) is provided with a tool slot (4310).

7. A support arm mechanism according to claim 1, wherein the stopper (21) and the turning block (22) are detachably mounted at both ends of the support arm (2), respectively; the support arm (2) comprises a top plate (201) and a bottom plate (202), and the top plate (201) and the bottom plate (202) are mutually assembled and enclosed to form the accommodating cavity (20).

8. A mobile phone holder, characterized by comprising a support arm mechanism according to any one of claims 1-7, further comprising a swing arm mechanism (7), a fastening mechanism (8) and a clamping mechanism (9); the swing arm mechanism (7) has the same structure as the support arm mechanism, and a guide seat (1) of the swing arm mechanism (7) is arranged on a limiting block (21) of the support arm mechanism so that the swing arm mechanism (7) is connected with the support arm mechanism for forming; the fastening mechanism (8) is arranged on the guide seat (1) of the supporting arm mechanism, and the clamping mechanism (9) is arranged on the limiting block (21) of the swing arm mechanism (7).

9. A handset support according to claim 8, wherein the fastening means (8) comprises a fastening plate (81) and a fastening bolt (82), the fastening plate (81) being mounted on the guide (1) of the support arm means, the fastening bolt (82) being arranged to extend through the fastening plate (81) and to secure it to a plane.

10. A handset support according to claim 8, wherein the clamping mechanism (9) comprises a connecting seat (91), a clamping arm (92) and a clamping member (93); the connecting seat (91) is detachably arranged on a limiting block (21) of the swing arm mechanism (7), and the clamping arm (92) is in damping hinge joint with the connecting seat (91); the clamping piece (93) is mounted on the clamping arm (92) and used for clamping the mobile phone.