CN220956411U - Rotating shaft mechanism and folding bracket - Google Patents

Abstract

The utility model discloses a rotating shaft mechanism and a folding bracket, wherein the rotating shaft mechanism comprises a rotating shaft, a spring, a cam and a concave wheel, a first fixing part and a second fixing part are respectively arranged at two ends of the rotating shaft, the spring, the cam and the concave wheel are sequentially sleeved on the rotating shaft, the cam and the concave wheel are respectively connected with the rotating shaft in a rotating way, the spring, the cam and the concave wheel are clamped between the first fixing part and the second fixing part, a convex part is arranged at one end of the cam, which is close to the concave wheel, a first concave part and a second concave part which are arranged at intervals are arranged at one end of the concave wheel, and when the cam and the concave wheel rotate relatively, the convex part can be adapted to the first concave part and the second concave part. According to the utility model, the rotating mechanism has no virtual position during rotation, so that the use experience of consumers can be improved.

Description

Rotating shaft mechanism and folding bracket

Technical Field

The utility model relates to the technical field of electronic product accessories, in particular to a rotating shaft mechanism and a folding bracket.

Background

With the continuous progress of electronic technology, electronic products such as mobile phones and tablet computers are also an indispensable tool in life, and people can use mobile phones or tablet computers to conduct conversation, chat, internet surfing, video surfing, game playing and the like. However, in the process of watching videos and learning by holding the electronic product for a long time, the harm such as neck fatigue, eye ache, arm stiffness and ache is easily caused; if the electronic product is obliquely placed on the desktop, the problems of neck fatigue, eye ache and the like caused by long-time holding of the electronic product by people can be relieved.

The bracket is used as an important mobile phone or a flat accessory, and can support the electronic product on a table, so that people can watch the mobile phone conveniently. In the prior art, the problems of complex structure, large whole occupied volume, high manufacturing cost and the like of some multi-dimensional adjusting brackets are caused by the relatively fixed structure; for some folding brackets with simple structures, the problem of larger virtual positions of a rotating mechanism exists.

Therefore, it is necessary to design a hinge mechanism and a folding bracket to solve the above problems.

Disclosure of Invention

Aiming at the technical problems, the utility model aims to provide a rotating shaft mechanism and a folding bracket, wherein the rotating mechanism has no virtual position during rotation, and can improve the use experience of consumers.

In order to achieve the above purpose, the utility model provides a rotating shaft mechanism, which comprises a rotating shaft, a spring, a cam and a concave wheel, wherein a first fixing part and a second fixing part are respectively arranged at two ends of the rotating shaft, the spring, the cam and the concave wheel are sequentially sleeved on the rotating shaft, the cam and the concave wheel are respectively connected with the rotating shaft in a rotating way, the spring, the cam and the concave wheel are clamped between the first fixing part and the second fixing part, a convex part is arranged at one end of the cam, which is close to the concave wheel, a first concave part and a second concave part are arranged at intervals at one end of the concave wheel, which is close to the cam, and when the cam and the concave wheel rotate relatively, the convex part can be adapted to the first concave part and the second concave part.

In some embodiments, the cam is provided with a first shaft hole, a first mounting part and an annular groove, wherein the first shaft hole penetrates through the cam and is used for the rotating shaft to penetrate through, the first mounting part is arranged on the outer wall of the cam and is used for mounting the cam on a product, and the annular groove is arranged at one end, close to the concave wheel, of the cam;

The concave wheel is provided with a second shaft hole, a second installation part and an annular boss, the second shaft hole penetrates through the concave wheel and is used for the rotating shaft to penetrate through, the second installation part is arranged on the outer wall of the concave wheel and is used for installing the concave wheel on a product, the annular boss is arranged at one end, close to the cam, of the concave wheel, and the annular boss is adapted to be inserted into the annular groove.

In some embodiments, two protruding parts are arranged at the end part of the cam, which is close to the concave wheel, and are respectively positioned at two opposite sides of the annular groove;

The first concave part and the second concave part are respectively provided with two groups, the two groups of the first concave part and the second concave part are arranged at the end part of the concave wheel, which is close to the cam, and are respectively positioned at two opposite sides of the annular boss, and the positions of the first concave part and the second concave part of each group correspond to the position of one convex part.

In some embodiments, the shaft comprises a first shaft section and a second shaft section fixedly connected, the outer diameter of the first shaft section is larger than that of the second shaft section, the spring is adapted to be arranged on the first shaft section, and the cam and the concave wheel are adapted to be arranged on the second shaft section.

In some embodiments, the first securing portion includes a securing plate secured to an end of the first shaft section remote from the second shaft section;

The one end that the pivot is close to the fixed plate is provided with the blind hole, the blind hole runs through the fixed plate and to being close to the direction of second shaft section extends preset length.

In some embodiments, the second fixing portion includes a gasket and a clamp spring, one end of the second shaft section away from the first shaft section is provided with a clamp spring groove, the clamp spring is adapted to be installed on the clamp spring groove, and the gasket is sleeved on the second shaft section and is located between the clamp spring and the concave wheel.

According to another aspect of the present utility model, there is further provided a folding stand comprising: the folding support comprises a first support, a second support and a rotating shaft mechanism, wherein the first support is rotatably connected with the second support through the rotating shaft mechanism, so that the folding support has an unfolding state and a folding state.

In some embodiments, one end of the first bracket is provided with a containing part for placing an electronic product, the other end of the first bracket is provided with a first connecting part, and the cam is movably connected with the first connecting part, so that when the cam rotates along with the first bracket, the cam can also axially move on the rotating shaft;

One end of the second bracket is provided with a second connecting part, and the concave wheel is fixedly connected with the second connecting part;

When the folding bracket is in the unfolding state, the convex part is positioned in the first concave part;

when the folding bracket is in the folded state, the convex part is positioned in the second concave part.

In some embodiments, the first connection portion includes a socket groove and two connection holes, the two connection holes being disposed at both sides of the socket groove;

The second connecting part comprises a splicing boss and two connecting grooves, and the two connecting grooves are arranged on two sides of the splicing boss;

The rotating shaft mechanisms are arranged in two, the inserting boss is adaptively inserted into the inserting groove, one rotating shaft mechanism is arranged in the connecting hole and the connecting groove on one side, and the other rotating shaft mechanism is arranged in the connecting hole and the connecting groove on the other side.

In some embodiments, the rotating shaft, the spring and the cam are arranged in the connecting hole, a mounting platform is arranged on the outer wall of the cam, a guiding platform is arranged at a corresponding position in the connecting hole, the guiding platform is in clearance fit with the mounting platform, one end, close to the second fixing portion, of the rotating shaft extends into the connecting groove and penetrates through the groove bottom wall of the connecting groove, the concave wheel is arranged in the connecting groove, and the second fixing portion is located on one side, away from the concave wheel, of the groove bottom wall of the connecting groove.

In some embodiments, a mounting cavity is provided on one side of the plug boss, the mounting cavity has an orifice, and the second fixing portion is located in the mounting cavity.

In some embodiments, a limiting boss is arranged in the plugging groove, the plugging boss is provided with a limiting groove, and the limiting boss is adapted to be arranged in the limiting groove;

When the first support rotates relative to the second support, the limiting boss moves back and forth in the limiting groove, and when the folding support is in the unfolding state, the limiting boss abuts against one side wall of the limiting groove.

In some embodiments, the first bracket is a plastic bracket, and the cam and the first bracket are assembled in a small-gap assembly or zero-fit manner;

And/or the second bracket is a plastic bracket, and the concave wheel and the second bracket are assembled in a small-gap or zero-fit manner.

Compared with the prior art, the rotating shaft mechanism and the folding bracket provided by the utility model have the following beneficial effects:

1. According to the rotating shaft mechanism provided by the utility model, when the cam and the concave wheel rotate to fixed positions, the convex part on the cam can be placed in the concave part on the concave wheel, so that the cam and the concave wheel are interfered to solve the problem of virtual positions, and the spring is arranged to cooperate with the relative rotation of the cam and the concave wheel, so that the rotating shaft mechanism has good rotating hand feeling, and the use experience of consumers is improved;

2. The folding bracket provided by the utility model has the advantages that the first bracket and the second bracket are plastic parts, the cost is low, the rotating mechanism is simple in structure, and no virtual position exists in rotation; and moreover, the cam, the concave wheel and the bracket adopt a small-gap assembly or zero-fit assembly mode, so that abnormal sound is avoided during rotation, and the use experience of consumers is further improved.

Drawings

The above features, technical features, advantages and implementation of the present utility model will be further described in the following description of preferred embodiments with reference to the accompanying drawings in a clear and easily understood manner.

FIG. 1 is a schematic view of a spindle mechanism according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic exploded view of a spindle mechanism according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of the cam of the preferred embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a concave wheel according to a preferred embodiment of the present utility model;

FIG. 5 is a schematic view of the spindle mechanism in the unfolded state according to the preferred embodiment of the present utility model;

FIG. 6 is a schematic view of the hinge mechanism in a folded state according to the preferred embodiment of the present utility model;

FIG. 7 is a schematic view showing the structure of the folded bracket in the unfolded state according to the preferred embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a folding stand in accordance with a preferred embodiment of the present utility model;

FIG. 9 is a cross-sectional view of a preferred embodiment folding stand of the present utility model in an unfolded state;

FIG. 10 is a schematic view showing a folded state of a folding stand according to a preferred embodiment of the present utility model;

FIG. 11 is a sectional view showing a folded state of the folding bracket according to the preferred embodiment of the present utility model;

FIG. 12 is a schematic view showing the structure of a first bracket according to the preferred embodiment of the present utility model;

fig. 13 is a schematic structural view of a second bracket according to a preferred embodiment of the present utility model.

Reference numerals illustrate:

The rotary shaft mechanism 1, the rotary shaft 11, the fixed plate 111, the first shaft section 112, the second shaft section 113, the blind hole 114, the snap spring groove 115, the spring 12, the cam 13, the first shaft hole 131, the first mounting part 132, the annular groove 133, the convex part 134, the concave wheel 14, the second shaft hole 141, the second mounting part 142, the annular boss 143, the first concave part 144, the second concave part 145, the gasket 15, the snap spring 16, the first bracket 2, the inserting groove 21, the limiting boss 211, the connecting hole 22, the guiding platform 221, the accommodating part 23, the second bracket 3, the inserting boss 31, the limiting groove 311, the connecting groove 32, the mounting boss 321 and the mounting cavity 33.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will explain the specific embodiments of the present utility model with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the utility model, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For simplicity of the drawing, only the parts relevant to the utility model are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In an embodiment, referring to fig. 1 to 6 of the drawings, the rotating shaft mechanism provided by the utility model comprises a rotating shaft 11, a spring 12, a cam 13 and a concave wheel 14, wherein a first fixing part and a second fixing part are respectively arranged at two ends of the rotating shaft 11, the spring 12, the cam 13 and the concave wheel 14 are sequentially sleeved on the rotating shaft 11, the cam 13 and the concave wheel 14 are respectively and rotatably connected with the rotating shaft 11, the spring 12, the cam 13 and the concave wheel 14 are respectively clamped between the first fixing part and the second fixing part, a convex part 134 is arranged at one end of the cam 13 close to the concave wheel 14, a first concave part 144 and a second concave part 145 which are arranged at intervals are arranged at one end of the concave wheel 14 close to the cam 13, and when the cam 13 and the concave wheel 14 relatively rotate, the convex part 134 can be suitably arranged in the first concave part 144 and the second concave part 145.

In this embodiment, when the cam 13 and the concave wheel 14 rotate to the first position, the convex part 134 on the cam 13 will be placed in the first concave part 144 on the concave wheel 14, and when the cam 13 and the concave wheel 14 rotate to the second position, the convex part 134 on the cam 13 will be placed in the second concave part 145 on the concave wheel 14, and when the cam 13 and the concave wheel 14 interfere with each other in the two positions, the problem of the virtual position is solved, and the spring 12 is arranged to cooperate with the relative rotation of the cam 13 and the concave wheel 14, so that the rotary feeling is good, and the use experience of consumers is improved.

In one embodiment, referring to fig. 1 to 4 of the drawings, the cam 13 is provided with a first shaft hole 131, a first mounting portion 132 and an annular groove 133, the first shaft hole 131 penetrating the cam 13 for the rotation shaft 11 to pass through, the first mounting portion 132 being provided on an outer wall of the cam 13 for mounting the cam 13 on a product, the annular groove 133 being provided at an end of the cam 13 near the concave wheel 14. The concave wheel 14 is provided with a second shaft hole 141, a second mounting part 142 and an annular boss 143, the second shaft hole 141 penetrates through the concave wheel 14 for the rotating shaft 11 to pass through, the second mounting part 142 is arranged on the outer wall of the concave wheel 14 and used for mounting the concave wheel 14 on a product, the annular boss 143 is arranged at one end of the concave wheel 14 close to the cam 13, and the annular boss 143 is adaptively inserted into the annular groove 133.

After the rotating shaft mechanism is assembled or arranged on a product, the spring 12, the cam 13 and the concave wheel 14 are sequentially sleeved on the rotating shaft 11, the cam 13 and the concave wheel 14 are respectively connected with the rotating shaft 11 in a rotating way, the spring 12, the cam 13 and the concave wheel 14 are tightly clamped between the first fixing part and the second fixing part, and the annular boss 143 is adaptively inserted into the annular groove 133; the two sides of the end of the convex part 134 are provided with inclined surfaces or arc surfaces, and the first concave part 144 and the second concave part 145 are provided with structures matched with the convex part 134, so that the cam 13 can rotate relative to the concave wheel 14 against the resistance of the spring 12, the convex part 134 can move from the first concave part 144 to the second concave part 145, and in the two positions, the cam 13 and the concave wheel 14 can interfere, and the problem of the virtual position is solved. By providing the mating structure of the annular boss 143 and the annular groove 133, rotational concentricity of the cam 13 and the concave wheel 14 is ensured.

Further, two protrusions 134 are provided, and the two protrusions 134 are disposed at the end of the cam 13 near the concave wheel 14 and are located at opposite sides of the annular groove 133, respectively. The first concave portion 144 and the second concave portion 145 are respectively provided with two groups, the two groups of the first concave portion 144 and the second concave portion 145 are arranged at the end portion, close to the cam 13, of the concave wheel 14 and are respectively located at two opposite sides of the annular boss 143, and the positions of the first concave portion 144 and the second concave portion 145 of each group correspond to the position of one convex portion 134. By providing two sets of the protruding portion 134, the first recessed portion 144, and the second recessed portion 145, the structure is more stable when the cam 13 interferes with the concave wheel 14.

In one embodiment, referring to fig. 1 and 2 of the specification, the rotating shaft 11 includes a first shaft section 112 and a second shaft section 113 that are fixedly connected, the outer diameter of the first shaft section 112 is larger than that of the second shaft section 113, the spring 12 is adapted to be disposed on the first shaft section 112, the spring 12 can be movably disposed on the first shaft section 112, and one end of the spring 12, which is close to the first fixing portion, can also be fixedly connected with the first shaft section 112, so as to avoid axial movement of the spring 12. The cam 13 and the concave wheel 14 are adapted to be arranged on the second shaft section 113, and the cam 13 and the concave wheel 14 can rotate relatively. Of course, the shaft 11 may be a straight shaft or divided into more shaft segments.

The first fixing portion includes a fixing plate 111, the fixing plate 111 is fixed at one end of the first shaft section 112 far away from the second shaft section 113, and the fixing plate 111, the first shaft section 112 and the second shaft section 113 can be integrally formed. The outer diameter of the fixing plate 111 is larger than the inner diameter of the spring 12 so that the spring 12 can be compressed between the fixing plate 111 and the cam 13. The end of the rotating shaft 11 near the fixed plate 111 is provided with a blind hole 114, and the blind hole 114 penetrates through the fixed plate 111 and extends for a preset length towards the direction near the second shaft section 113. The blind hole 114 can assist in fixing the spindle 1 when the spindle mechanism 1 is mounted on a product.

Further, the second fixing portion includes a gasket 15 and a clamp spring 16, a clamp spring groove 115 is formed at one end of the second shaft section 113 away from the first shaft section 112, the clamp spring 16 is adapted to be mounted on the clamp spring groove 115, and the gasket 15 is sleeved on the second shaft section 113 and located between the clamp spring and the 16 concave wheel 14. The detachable assembly of the rotating shaft mechanism 1 is realized by arranging the clamp spring 16, and the structure is simple and the assembly and the disassembly are convenient.

It should be noted that, the specific structures of the first fixing portion and the second fixing portion are set forth in the manner corresponding to the placement modes of the drawings in the specification, and other fixing modes may also be adopted in the actual use process, which is only for better illustrating the present utility model and should not be construed as limiting the present utility model.

According to another aspect of the present utility model, referring to fig. 1 to 13 of the drawings, the present utility model further provides a folding stand comprising: the first bracket 2, the second bracket 3 and the rotating shaft mechanism 1, wherein the first bracket 2 is rotationally connected with the second bracket 3 through the rotating shaft mechanism 1. The rotating shaft mechanism 1 comprises a rotating shaft 11, a spring 12, a cam 13 and a concave wheel 14, wherein a first fixing part and a second fixing part are respectively arranged at two ends of the rotating shaft 11, the spring 12, the cam 13 and the concave wheel 14 are sequentially sleeved on the rotating shaft 11, the cam 13 and the concave wheel 14 are respectively connected with the rotating shaft 11 in a rotating mode, the spring 12, the cam 13 and the concave wheel 14 are clamped between the first fixing part and the second fixing part, a convex part 134 is arranged at one end, close to the concave wheel 14, of the cam 13, a first concave part 144 and a second concave part 145 which are arranged at intervals are arranged at one end, close to the cam 13, of the concave wheel 14, and when the cam 13 and the concave wheel 14 rotate relatively, the convex part 134 can be suitably arranged in the first concave part 144 and the second concave part 145. The folding bracket has an unfolded state in which the protrusion 134 is located within the first recess 144 and a folded state; in the folded state, the protrusion 134 is located within the second recess 145.

Specifically, one end of the first bracket 2 is provided with a receiving portion 23 for placing an electronic product, the other end of the first bracket 2 is provided with a first connecting portion, and the cam 13 is movably connected with the first connecting portion, so that when the cam 13 rotates with the first bracket 2, the cam 13 can also axially move on the rotating shaft 11. One end of the second bracket 3 is provided with a second connecting part, and the concave wheel 14 is fixedly connected with the second connecting part.

Further, the first connection part comprises a plugging slot 21 and two connection holes 22, and the two connection holes 22 are arranged at two sides of the plugging slot 21; the second connection part comprises a plug boss 31 and two connection grooves 32, and the two connection grooves 32 are arranged on two sides of the plug boss 31. The two rotating shaft mechanisms 1 are respectively arranged on two sides of the folding bracket, the inserting boss 31 is adaptively inserted in the inserting groove 21, one rotating shaft mechanism 1 is arranged in the connecting hole 22 and the connecting groove 32 on one side, and the other rotating shaft mechanism 1 is arranged in the connecting hole 22 and the connecting groove 32 on the other side.

The rotating shaft 11, the spring 12 and the cam 13 are arranged in the connecting hole 22, a first mounting part 132 on the outer wall of the cam 13 is a mounting platform, a guiding platform 221 is arranged at a corresponding position in the connecting hole 22, the guiding platform 221 is in clearance fit with the mounting platform, one end of the rotating shaft 11, which is close to the second fixing part, stretches into the connecting groove 32 and penetrates through the groove bottom wall of the connecting groove 32, the concave wheel 14 is arranged in the connecting groove 32, and the gasket 15 and the clamp spring 16 are positioned on one side, far away from the concave wheel 14, of the groove bottom wall of the connecting groove 32. One side of the plugging boss 31 is provided with an installation cavity 33, the gasket 15 and the clamp spring 16 are positioned in the installation cavity 33, the installation cavity 33 is provided with a cavity opening, and the gasket 15 and the clamp spring 16 can be conveniently assembled and disassembled through the cavity opening.

Further, the first bracket 2 is a plastic bracket, and the assembly mode of the cam 13 and the first bracket 2 is small gap assembly or zero assembly; the second bracket 3 is a plastic bracket, and the concave wheel 14 and the second bracket 3 are assembled in a small gap or zero fit mode. By arranging the first bracket 2 and the second bracket 3 as plastic parts, the cost is low, the rotating mechanism 1 has a simple structure, and no virtual position exists in rotation; and moreover, the cam 13, the concave wheel 14 and the bracket adopt a small-gap assembly or zero-fit assembly mode, so that abnormal sound is avoided during rotation, and the use experience of consumers is further improved.

Further, a limiting boss 211 is disposed in the plugging slot 21, the plugging boss 31 is provided with a limiting groove 311, and the limiting boss 211 is disposed in the limiting groove 311. When the first bracket 2 rotates relative to the second bracket 3, the limiting boss 211 moves reciprocally in the limiting groove 311, and when the folding bracket is in an unfolding state, the limiting boss 211 is abutted against one side wall of the limiting groove 311; when the folding bracket is in a folding state, the first bracket 2 and the second bracket 3 are clung together, and a limiting structure is not required to be arranged for limiting. The specific opening and closing angles of the first bracket 2 and the second bracket 3 can be set according to actual requirements, and the embodiment is not particularly limited, and can be, for example, 30 ° to 90 °.

It should be noted that, the specific structures of the first connecting portion and the second connecting portion are set forth in the manner corresponding to the drawings in the specification, and other fixing manners may also be adopted in the actual use process, which are only for better illustrating the present utility model, and should not be construed as limiting the present utility model.

In practical application, when people need to use electronic terminal equipment such as a mobile phone, a tablet personal computer, a game machine, an electronic book reader and the like, the folding bracket can be adjusted to be in an unfolding state, and the electronic terminal equipment is supported by the folding bracket, so that hands can be liberated, and the discomfort of arm numbness caused by people holding the mobile phone for a long time can be improved. When people need to go out, the folding support can be adjusted to be in a folding state, so that the size of the folding support is reduced, the folding support is convenient to carry, the use rate is improved, and the practicability is enhanced.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the parts of a certain embodiment that are not described or depicted in detail may be referred to in the related descriptions of other embodiments.

It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (13)

1. The utility model provides a pivot mechanism, its characterized in that includes pivot, spring, cam and concave wheel, the both ends of pivot are provided with first fixed part and second fixed part respectively, the spring the cam the concave wheel overlaps in proper order and locates in the pivot, the cam with the concave wheel respectively with the pivot rotates to be connected, the spring the cam the concave wheel presss from both sides locates between first fixed part with the second fixed part, the cam is close to the one end of concave wheel is provided with the convex part, the concave wheel is close to the one end of cam is provided with first concave part and the second concave part of interval arrangement, the cam with when concave wheel relative rotation, the convex part can be adapted in first concave part and in the second concave part.

2. The spindle mechanism according to claim 1, wherein,

The cam is provided with a first shaft hole, a first mounting part and an annular groove, wherein the first shaft hole penetrates through the cam and is used for allowing the rotating shaft to pass through, the first mounting part is arranged on the outer wall of the cam and is used for mounting the cam on a product, and the annular groove is arranged at one end, close to the concave wheel, of the cam;

The concave wheel is provided with a second shaft hole, a second installation part and an annular boss, the second shaft hole penetrates through the concave wheel and is used for the rotating shaft to penetrate through, the second installation part is arranged on the outer wall of the concave wheel and is used for installing the concave wheel on a product, the annular boss is arranged at one end, close to the cam, of the concave wheel, and the annular boss is adapted to be inserted into the annular groove.

3. The spindle mechanism according to claim 2, wherein,

The two convex parts are arranged at the end part of the cam, which is close to the concave wheel, and are respectively positioned at two opposite sides of the annular groove;

The first concave part and the second concave part are respectively provided with two groups, the two groups of the first concave part and the second concave part are arranged at the end part of the concave wheel, which is close to the cam, and are respectively positioned at two opposite sides of the annular boss, and the positions of the first concave part and the second concave part of each group correspond to the position of one convex part.

4. The spindle mechanism according to claim 1, wherein,

The rotating shaft comprises a first shaft section and a second shaft section which are fixedly connected, the outer diameter of the first shaft section is larger than that of the second shaft section, the spring is matched with the first shaft section, and the cam and the concave wheel are matched with the second shaft section.

5. The spindle mechanism as recited in claim 4, wherein,

The first fixing part comprises a fixing plate, and the fixing plate is fixed at one end of the first shaft section far away from the second shaft section;

The one end that the pivot is close to the fixed plate is provided with the blind hole, the blind hole runs through the fixed plate and to being close to the direction of second shaft section extends preset length.

6. The spindle mechanism as recited in claim 4, wherein,

The second fixing part comprises a gasket and a clamp spring, a clamp spring groove is formed in one end, far away from the first shaft section, of the second shaft section, the clamp spring is arranged on the clamp spring groove in an adaptive mode, and the gasket is sleeved on the second shaft section and located between the clamp spring and the concave wheel.

7. A folding brace, comprising: a first support, a second support and a spindle mechanism according to any one of claims 1-6, said first support being rotatably connected to said second support by said spindle mechanism such that said folding support has an unfolded state and a folded state.

8. The folding leg according to claim 7, wherein the folding leg is formed of a material having a shape of a sheet,

One end of the first bracket is provided with a containing part for containing electronic products, the other end of the first bracket is provided with a first connecting part, and the cam is movably connected with the first connecting part, so that when the cam rotates along with the first bracket, the cam can also axially move on the rotating shaft;

One end of the second bracket is provided with a second connecting part, and the concave wheel is fixedly connected with the second connecting part;

When the folding bracket is in the unfolding state, the convex part is positioned in the first concave part;

when the folding bracket is in the folded state, the convex part is positioned in the second concave part.

9. The folding leg according to claim 8, wherein the folding leg is formed of a material selected from the group consisting of,

The first connecting part comprises a plugging groove and two connecting holes, and the two connecting holes are arranged on two sides of the plugging groove;

The second connecting part comprises a splicing boss and two connecting grooves, and the two connecting grooves are arranged on two sides of the splicing boss;

The rotating shaft mechanisms are arranged in two, the inserting boss is adaptively inserted into the inserting groove, one rotating shaft mechanism is arranged in the connecting hole and the connecting groove on one side, and the other rotating shaft mechanism is arranged in the connecting hole and the connecting groove on the other side.

10. The folding leg according to claim 9, wherein the folding leg is configured to be folded,

The rotating shaft, the spring and the cam are arranged in the connecting hole, an installation platform is arranged on the outer wall of the cam, a guide platform is arranged at a corresponding position in the connecting hole, the guide platform is in clearance fit with the installation platform, one end, close to the second fixing portion, of the rotating shaft stretches into the connecting groove and penetrates through the groove bottom wall of the connecting groove, the concave wheel is arranged in the connecting groove, and the second fixing portion is located on one side, away from the concave wheel, of the groove bottom wall of the connecting groove.

11. The folding leg according to claim 10, wherein the folding leg is configured to fold,

One side of the plug boss is provided with an installation cavity, the installation cavity is provided with an coelent, and the second fixing part is positioned in the installation cavity.

12. The folding leg according to claim 9, wherein the folding leg is configured to be folded,

A limiting boss is arranged in the inserting groove, the inserting boss is provided with a limiting groove, and the limiting boss is adapted to be arranged in the limiting groove;

When the first support rotates relative to the second support, the limiting boss moves back and forth in the limiting groove, and when the folding support is in the unfolding state, the limiting boss abuts against one side wall of the limiting groove.

13. The folding leg according to claim 7, wherein the folding leg is formed of a material having a shape of a sheet,

The first bracket is a plastic bracket, and the assembly mode of the cam and the first bracket is small-gap assembly or zero assembly;

And/or the second bracket is a plastic bracket, and the concave wheel and the second bracket are assembled in a small-gap or zero-fit manner.