Adjustable fixing device for mobile terminal

Abstract

The utility model discloses an adjustable fixing device for a mobile terminal, which comprises a fixing sleeve, two movable parts and two clamping parts, the fixing sleeve is provided with a synchronous adjusting mechanism and an adjusting locking mechanism perpendicular to the clamping direction, the synchronous adjusting mechanism comprises a synchronous gear, and the synchronous gear is provided with a synchronous locking mechanism. The synchronous gear is meshed with racks which are oppositely arranged on the two movable parts, when the synchronous gear is opened, the synchronous gear is meshed with the two racks to respectively drive the two movable parts to synchronously move outwards, and when one movable part moves inwards during clamping, the synchronous gear is meshed with the two racks to respectively drive the two movable parts to synchronously move outwards to move towards the clamping direction. A larger opening or faster clamping can be generated in the same adjusting stroke, and the adjusting efficiency is improved. And meanwhile, the locking direction of the locking mechanism is adjusted to be perpendicular to the clamping direction, and the locking reliability can be improved. In addition, one-hand operation can be achieved by directly rotating the synchronous gear or stretching and compressing the clamping part on one side, and operation convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of clamping and fixing technical field, in particular to a kind of mobile terminal adjustable fixing device. BACKGROUND

[0002] The existing portable electronic products, including smart phone, tablet computer and other product functions more and more, its use scene is more and more extensive, in certain scene, it is not necessary to hand, usually need to be fixed by fixing mechanism, so that mobile phone, tablet computer support application is born. The current support is usually fixed by magnetic attraction or clamping. The existing clamping and fixing usually cannot be operated by one hand, and due to the lack of locking clamping, the electronic product and the fixing device are separated in a specific scene, and the phenomenon of unstable fixation occurs. SUMMARY

[0003] The utility model mainly solves the technical problem to provide a kind of mobile terminal adjustable fixing device. The mobile terminal adjustable fixing device can realize more stable fixation, improve the stability and reliability of electronic product fixation.

[0004] In order to solve the above problems, the utility model provides a kind of mobile terminal adjustable fixing device. The mobile terminal adjustable fixing device, including fixed sleeve, two movable parts respectively arranged in fixed sleeve and two clamping parts respectively provided with one end of two movable parts, the fixed sleeve is equipped with synchronous adjusting mechanism for adjusting the synchronous extension of two movable parts and adjusting locking mechanism perpendicular to clamping direction, wherein, the synchronous adjusting mechanism includes synchronous gear fixed in fixed base, the synchronous gear is engaged with the rack oppositely arranged on two movable parts, when opening, the synchronous gear is engaged with two racks respectively to drive two movable parts to move outward synchronously, when clamping, one movable part moves inward, the synchronous gear is engaged with two racks respectively to drive two movable parts to move outward and move to clamping direction.

[0005] As a preferred embodiment, each movable part includes an adjusting end that cooperates with the synchronous adjusting mechanism, the adjusting end has two guide columns along the length direction, and an adjusting groove is formed between the two guide columns.

[0006] As a preferred embodiment, the adjustable fixing device further includes an adjusting locking mechanism, the adjusting locking mechanism includes a locking component and an adjusting part that adjusts the position of the locking component, the locking component includes a locking block and a connecting screw connected to the locking block, the locking block is located in a locking groove on the movable part, the locking groove is connected to the adjusting groove, and the connecting screw is connected to the adjusting part through a through hole in the fixed sleeve. When locking, the position of the locking block is adjusted by the adjusting part to fix the movable part and the fixed sleeve.

[0007] As a preferred embodiment, the locking groove comprises a movable groove which is freely movable with the locking block, and limiting strips extending inwardly on the side walls of the movable groove, and a strip-shaped hole between the two limiting strips which is freely movable with the connecting screw rod, and the width of the movable groove is greater than the width of the strip-shaped hole.

[0008] As a preferred embodiment, the locking groove is in V-shaped structure in the vertical aspect of the length, and the locking block is matched with the V-shaped locking groove.

[0009] As a preferred embodiment, the adjustable fixing device further comprises a fine adjustment mechanism arranged between the clamping part and the movable part to finely adjust the clamping force.

[0010] As a preferred embodiment, the fine adjustment mechanism comprises a fine adjustment knob and a connecting rod connected with the fine adjustment knob, the connecting rod is threadedly connected with the movable part through the accommodation hole on the clamping part, and a telescopic spring is arranged between the clamping part and the movable part, one end of the telescopic spring is located in the spring hole on the movable part.

[0011] As a preferred embodiment, when the telescopic spring is two, the two telescopic springs are respectively located on the two sides of the connecting rod and are located on the same straight line with the connecting rod.

[0012] As a preferred embodiment, the clamping part is provided with an accommodation cavity for accommodating the end of the movable part.

[0013] As a preferred embodiment, the synchronous gear is installed in the middle of the fixing seat.

[0014] As a preferred embodiment, the adjustable fixing device further comprises a mounting seat for fixing the synchronous gear, the mounting seat is fixed with the fixing seat through a fixing screw, the mounting seat is provided with a clamping mechanism, the clamping mechanism comprises annularly distributed clamping blocks and an adjusting part for making the clamping blocks close to each other, the middle of the annularly distributed clamping blocks is provided with a clamping and fixing cavity, there is a clamping contraction gap between each clamping block, the end of each clamping block is provided with an inwardly inclined curved surface, the outer side of each clamping block is provided with a screw thread, the adjusting part is provided with a first hole with a screw thread and a second hole coaxial with the first hole, the diameter of the second hole is smaller than that of the first hole, when the screw thread on the first hole is matched with the screw thread on the clamping block and rotated in the tightening direction, the curved surface at the end of each clamping block is matched with the second hole, so that the clamping and fixing cavity becomes smaller and the parts located in the clamping and fixing cavity are clamped and fixed.

[0015] The utility model discloses a mobile terminal adjustable fixing device, the mobile terminal adjustable fixing device, including fixed sleeve, two movable parts of one end respectively located in fixed sleeve and two clamping parts of one end respectively equipped with two movable parts, the fixed sleeve is equipped with the synchronous adjusting mechanism of adjusting two movable parts synchronous telescopic and with the clamping direction vertical adjusting locking mechanism, wherein, the synchronous adjusting mechanism includes the synchronous gear fixed in fixed base, and the synchronous gear is engaged with the rack of opposite setting on two movable parts, when opening, the synchronous gear is engaged with two racks and respectively drives two movable parts synchronous outward movement, when clamping, synchronous gear and two racks are engaged and respectively drive two movable parts synchronous outward movement to the clamping direction movement when one movable part moves inwards. Because the adjusting fixing device can realize synchronous adjustment, can produce greater opening or faster clamping in the same adjustment stroke, improve the adjustment efficiency. The locking direction of adjusting locking mechanism is perpendicular to the clamping direction simultaneously, can improve the reliability of locking. In addition, can realize one -handed operation through the direct rotation synchronous gear or the stretching compression one side's clamping part, improve the convenience of operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the embodiment or prior art description needed to use the drawing briefly introduced, obviously, the drawing in the description only shows some embodiments of the present application, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0017] Figure 1 It is the utility model mobile terminal adjustable fixing device embodiment structure schematic diagram.

[0018] Figure 2 It is the utility model adjustable fixing device embodiment internal structure one view schematic diagram.

[0019] Figure 3 It is the utility model adjustable fixing device embodiment internal structure another view schematic diagram.

[0020] Figure 4 It is the utility model adjustable fixing device embodiment internal structure still another view schematic diagram.

[0021] Figure 5 It is the utility model adjustable fixing device internal structure decomposition one view schematic diagram.

[0022] Figure 6 It is the utility model adjustable fixing device internal structure decomposition another view schematic diagram.

[0023] Figure 7is a perspective view of the internal structure of the adjustable fixing device according to the present application from another angle.

[0024] Figure 8 is a perspective view of the internal structure of the adjustable fixing device according to the present application from a fourth angle.

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] The claims of the present application will be further described in detail below with reference to the embodiments and the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor also belong to the scope of protection of the present application.

[0027] It should be understood that, in the embodiments of the present application, all directional terms such as "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of simplifying the description of the present application, and do not mean that the indicated device, element or component must have a specific orientation and a specific orientation structure, and should not be understood as a limitation on the present application. It is only used to explain the relative positional relationship, movement condition, etc. between the components shown in the drawings, and when the specific attitude changes, the directional indication may also change accordingly.

[0028] In addition, in the present application, ordinal numbers such as "first", "second", etc. are only used for distinguishing purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can be explicitly or implicitly and at least one of the technical features. In the present application, in order to facilitate the description, the quantifier such as "one", "two", "multiple", "at least one" or "several" etc. is used to limit the technical (structural) features, wherein "multiple" means at least two, i.e. two or more than two; "at least one" or "several" means one or one and the corresponding technical features; the quantifier is only used to describe the specific embodiment or the best embodiment, as long as it does not contradict the overall concept of the present application and the purpose of the invention, it should be included, except that it is explicitly stated that it must be limited by the quantifier described or in order to achieve the purpose of the present application.

[0029] In the utility model, unless another definite provision and limitation, the terms "mount", "set", "connect", "fix", "screw" and so on should do the broad sense understanding, for example, can be the relative fixed position relation between the components, also can be the physical fixed connection between the components, can be detachable connection, or integral structure, can be mechanical connection, also can be the electric signal connection, can be direct connection, also can be indirectly connected through the intermediate medium or component, can be the intercommunication of two elements, also can be the interaction relation of two elements, unless the specification has another definite limitation, can realize corresponding function or effect when can not be understood as other, for the ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

[0030] The utility model if have the controller, control circuit involved is the control technology or unit of the routine of the person skilled in the art, such as the control circuit of the controller can be by the ordinary skilled in the art with existing, such as simple programming can be realized.If the software or program involved with hardware cooperation realizes the control result, such as the description is not described in detail, it shows that the software or program control process involved, then belongs to the routine technology of the ordinary skilled in the art with existing technology.The power supply also adopts the existing technology in the art belonging to the field, and the utility model mainly utility model technical point lies in the improvement to mechanical device, so the utility model does not detail the specific circuit control relationship and circuit connection again.

[0031] The utility model discloses provides many different implementation modes or examples to realize the different structure of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples in the utility model are described. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeatedly refer to the number and / or reference letter in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but the ordinary skilled in the art can realize the application of other processes and / or the use of other materials.

[0032] The preferred embodiments of the utility model are described below in conjunction with the drawings, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0033] As Figures 1-8 The utility model provides a kind of mobile terminal adjustable fixing device embodiment.

[0034] The mobile terminal adjustable fixing device, comprising a fixed sleeve A, two movable parts respectively arranged in the fixed sleeve A and two clamping parts respectively arranged with one end of the two movable parts, namely the two movable parts comprising a first movable part 1 and a second movable part 2, the fixed sleeve A is hollow in length direction, the two clamping parts comprising a first clamping part 3 and a second clamping part 4. The fixed sleeve A is provided with a synchronous adjusting mechanism 5 for adjusting the synchronous extension and retraction of the first movable part 1 and the second movable part 2 and an adjusting locking mechanism 6 perpendicular to the clamping direction, wherein the synchronous adjusting mechanism 5 comprises a synchronous gear 52 fixed on the fixed seat, the synchronous gear 52 is engaged with a gear rack oppositely arranged on the first movable part 1 and the second movable part 2, namely a second gear rack 211 is arranged on the second movable part 2 and a first gear rack 111 is arranged on the first movable part 1, when opened, the synchronous gear 52 is engaged with the first gear rack 111 and the second gear rack 211 to drive the first movable part 1 and the second movable part 2 to move outward synchronously, when clamping, the first movable part 1 or the second movable part 2 moves inward, the synchronous gear 52 is engaged with the first gear rack 111 and the second gear rack 211 to drive the first movable part 1 and the second movable part 2 to move outward to the clamping direction. The gear racks are arranged on the second movable part 2 and the first movable part 1 respectively, and the gear rack on the first movable part 1 is oppositely arranged with the gear rack on the second movable part 2, and is engaged with the opposite sides of the synchronous gear 52 respectively, and the two gear racks are engaged with the synchronous gear 52 at the diametrically opposite ends of the synchronous gear 52.

[0035] Specifically, the first clamping part 3 and the second clamping part 4 have basically the same structure, the first clamping part 3 and the second clamping part 4 are respectively provided with a weight-reducing hole, wherein the second clamping part 4 is fixed with the first movable part 1 by bolts, and the cooperation surface of the second clamping part 4 and the first movable part 1 is provided with a second fixed groove (not marked in the drawing) for accommodating the end of the first movable part 1. The cooperation surface of the first clamping part 3 and the second movable part 2 is provided with an accommodation cavity 32 for accommodating the end of the second movable part 2, and the clamping surface of the first clamping part 3 is provided with a first elastic layer 33. The clamping surface of the second clamping part 4 is provided with a second elastic layer (not shown in the drawing), which can improve the stability of clamping and avoid forming damaging marks on the side of the mobile terminal during clamping.

[0036] The fixed sleeve A is provided with a guide strip (not shown in the drawing) on both sides, which is matched with the guide groove on both sides of the first movable part 1 and the second movable part 2 to realize guidance, reduce the contact area between the fixed sleeve A during adjustment, and reduce the adjustment force during adjustment.

[0037] The first movable part 1 and the second movable part 2 comprise an adjusting end matched with the synchronous gear 52, which has two guide columns along the length direction and an adjusting slot formed between the two guide columns, i.e. the adjusting end of the first movable part 1 is provided with a first guide column 11 and a second guide column 12, and a first adjusting slot 13 is formed between the first guide column 11 and the second guide column 12, the first rack 111 is located on the side of the first guide column 11 close to the first adjusting slot 13, the lower surface of the first guide column 11 away from the adjusting end of the first clamping part 3 is provided with two first notches 14, and a first protrusion 16 consistent with the direction of the first adjusting slot 13 is formed between the two first notches 14, the end of the first protrusion 16 extends to the side wall of the first adjusting slot 13, and the first notch 14 forms a first stop 15 in the adjusting direction. The first protrusion 16 is provided with a first guide structure matched with the third guide column 21 and the fourth guide column 22 on both sides. The first guide structure comprises matched inclined surfaces.

[0038] The adjusting end of the second movable part 2 is provided with a third guide column 21 and a fourth guide column 22, a second adjusting slot 23 is formed between the third guide column 21 and the fourth guide column 22, the second rack 211 is located on the side of the third guide column 21 close to the second adjusting slot 23, the lower surface of the third guide column 21 away from the adjusting end of the second clamping part 4 is provided with two second notches 24, and a second protrusion 26 consistent with the direction of the second adjusting slot 23 is formed between the two second notches 24, the end of the second protrusion 26 extends to the side wall of the second adjusting slot 23, the second notch 24 forms a second stop 25 in the adjusting direction, and the second protrusion 26 is provided with a locking slot 27 matched with the adjusting locking mechanism 6. The second protrusion 26 is provided with a second guide structure matched with the first guide column 11 and the second guide column 12 on both sides, and the second guide structure comprises matched inclined surfaces.

[0039] The adjustable fixing device further comprises an adjusting locking mechanism 6, which comprises a locking part 61 and an adjusting part 60 where the locking part 61 is located, the locking part 61 comprises a locking block 611 and a connecting screw 610 connected with the locking block 610, the locking block 611 is located in a locking slot 27 on a movable part, the locking slot 27 is connected with the second adjusting slot 23, the connecting screw 610 is matched with the adjusting part 60 through a through hole in the fixed sleeve A, and when locked, the position of the locking block 611 is adjusted through the adjusting part 60 to fix the second movable part 2 with the fixed sleeve A, the locking direction of the adjusting locking mechanism 6 is perpendicular to the clamping direction, so that after locking, loosening is not easy to occur, and the stability of clamping is improved.

[0040] The locking groove 27 includes a movable groove (not shown in the figure) which cooperates with the locking block 611 to move freely, the side wall of the movable groove 271 is provided with two limiting strips (not shown in the figure) extending inwardly, and a strip-shaped hole 272 which cooperates with the connecting screw 610 to move freely is formed between the two limiting strips, the width of the movable groove 271 is greater than the width of the strip-shaped hole, and the locking block 611 is smaller than the movable groove and can move freely in the movable groove. According to the needs, the locking groove 27 is V-shaped in cross section along the length direction, the locking block 611 cooperates with the V-shaped locking groove, and locking and fixing can also be achieved.

[0041] As a preferred embodiment, the adjustable fixing device further comprises a fine adjustment mechanism 7 provided between the second clamping part 4 and the second movable part 2 to finely adjust the clamping force, the fine adjustment mechanism 7 comprises a fine adjustment knob 71 and a connecting rod 72 connected with the fine adjustment knob 71, the connecting rod 72 is threadedly connected with the second movable part 2 through a clearance hole (not shown in the figure) on the second clamping part 3, and a telescopic spring 73 is arranged between the second clamping part 3 and the second movable part 2, one end of the telescopic spring 73 is located in a spring hole (not shown in the figure) arranged at the end of the second movable part, when the telescopic spring 73 is two, the two telescopic springs 73 are respectively located on the two sides of the connecting rod 72 and are located on the same straight line with the connecting rod 72, so that the balance of force on both sides during fine adjustment can be ensured, and the adjustment is easier. The synchronous gear 53 is installed in the middle of the fixing sleeve A.

[0042] The adjustable fixing device further comprises a mounting seat 521 for fixing the synchronous gear 53, the mounting seat 521 is fixed with the fixing sleeve A by fixing screws, the mounting seat 521 is provided with a clamping mechanism 522, the clamping mechanism 522 comprises annularly distributed clamping blocks 5222 and an adjusting component 51 for making the clamping blocks 5222 close, the middle of the annularly distributed clamping blocks 5222 is provided with a clamping and fixing cavity 511, there is a clamping and contraction gap 5221 between each clamping block 5222, an inwardly inclined curved surface 5223 is arranged at the end of each clamping block 5222, and each clamping block 5222 is provided with threads on the outer side, the adjusting component 51 is provided with a first hole (not shown in the figure) with threads and a second hole (not shown in the figure) coaxial with the first hole, wherein the diameter of the second hole is smaller than that of the first hole, when the threads on the first hole are matched with the threads on the clamping blocks and rotated in the tightening direction, the curved surface at the end of each clamping block is matched with the second hole, so that the clamping and fixing cavity becomes smaller and the components located in the clamping and fixing cavity are clamped and fixed.

[0043] According to the needs, the first guide groove 17 is arranged on the two sides of the first movable part 1, the second guide groove 28 is also arranged on the two sides of the second movable part 2, and the first guide groove 17 and the second guide groove 28 are on the same straight line.

[0044] In use, when the locking mechanism is in the loosened state, one clamping part can be moved outward by one hand, and the other clamping part is moved outward under the action of the adjusting gear 53. When clamping, one clamping part is moved in the clamping direction, and the other clamping part moves towards it, so that clamping is achieved. And the locking mechanism is used to lock one movable part and the fixed sleeve A, so that clamping locking is achieved. At the same time, the clamping force can be adjusted through the fine adjustment mechanism 7. Because the adjusting device can realize synchronous adjustment, greater opening or faster clamping can be achieved in the same adjusting stroke, so that the adjusting efficiency is improved. At the same time, the locking direction of the adjusting locking mechanism is perpendicular to the clamping direction, so that the locking reliability can be improved. In addition, the synchronous gear can be directly rotated, or the clamping part on one side can be stretched or compressed, so that one-handed operation is realized, and the operation convenience is improved.

[0045] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some structures (technical features) in one or more embodiments can be replaced, combined, without changing the essence of the corresponding technical solutions, which does not deviate from the spirit and scope of the technical solutions of the embodiments of the present application. Unless the possibility of replacing or combining the structures (technical features) in different embodiments is explicitly excluded in the embodiments, or the replacement or combination is contrary to the overall concept of the present application.

Claims

1. A mobile terminal adjustable fixing device, comprising a fixing sleeve, two movable parts respectively arranged in the fixing sleeve at one end, and two clamping parts respectively arranged with one end of the two movable parts, characterized in that, The fixed sleeve is provided with a synchronous adjusting mechanism for adjusting the synchronous extension and contraction of the two movable parts and an adjusting locking mechanism perpendicular to the clamping direction, wherein the synchronous adjusting mechanism comprises a synchronous gear fixed on the fixed seat, which is engaged with two toothed racks arranged oppositely on the two movable parts; when opened, the synchronous gear is engaged with the two toothed racks to drive the two movable parts to move outward synchronously; when clamped, when one movable part moves inward, the synchronous gear is engaged with the two toothed racks to drive the two movable parts to move outward synchronously and move in the clamping direction.

2. The mobile terminal adjustable fixture of claim 1, wherein, Each movable part comprises an adjusting end matched with the synchronous adjusting mechanism, two guide columns in the length direction, and an adjusting groove formed between the two guide columns.

3. The mobile terminal adjustable fixture of claim 1, wherein, The adjusting locking mechanism comprises a locking component and an adjusting part for adjusting the position of the locking component, the locking component comprises a locking block and a connecting screw connected with the locking block, the locking block is located in a locking groove on a movable part, the locking groove is connected with the adjusting groove, the connecting screw is matched with the adjusting part through a through hole on the fixed sleeve, and when locked, the position of the locking block is adjusted by the adjusting part to fix the movable part with the fixed sleeve.

4. The mobile terminal adjustable fixture of claim 3, wherein, The locking groove comprises a movable groove matched with the locking block, a limiting strip extending inward on the side wall of the movable groove, and a strip-shaped hole matched with the connecting screw between the two limiting strips, and the width of the movable groove is greater than the width of the strip-shaped hole.

5. A mobile terminal adjustable fixture according to claim 3 or 4, characterised in that, The locking groove has a V-shaped structure in the vertical section along the length direction, and the locking block is matched with the V-shaped locking groove.

6. The mobile terminal adjustable fixture of claim 1, wherein, The adjustable fixing device further comprises a fine adjustment mechanism arranged between the clamping part and the movable part to fine adjust the clamping force.

7. The mobile terminal adjustable fixture of claim 6, wherein, The fine adjustment mechanism comprises a fine adjustment knob and a connecting rod connected with the fine adjustment knob, the connecting rod is threadedly connected with the movable part through a clearance hole on the clamping part, and a telescopic spring is arranged between the clamping part and the movable part, one end of the telescopic spring is located in a spring hole on the movable part.

8. The mobile terminal adjustable fixture of claim 7, wherein, When there are two telescopic springs, the two telescopic springs are respectively located on the two sides of the connecting rod and are located on the same straight line with the connecting rod.

9. The mobile terminal adjustable fixture of claim 7, wherein, The clamping part is provided with a receiving cavity for receiving the end of the movable part.

10. The mobile terminal adjustable fixture of claim 1, wherein, The synchronous gear is installed in the middle of the fixed seat.

11. The mobile terminal adjustable fixture of claim 1, wherein, The adjustable fixing device further comprises a mounting seat for fixing the synchronous gear, the mounting seat is fixed with the fixed seat by a fixing screw, the mounting seat is provided with a clamping mechanism, the clamping mechanism comprises annularly distributed clamping blocks and an adjusting component for making the clamping blocks close to each other, the middle of the annularly distributed clamping blocks is provided with a clamping fixing cavity, there is a clamping contraction gap between each clamping block, the end of each clamping block is provided with an inwardly inclined curved surface, the outer side of each clamping block is provided with a thread, the adjusting component is provided with a first hole with a thread and a second hole coaxial with the first hole, the diameter of the second hole is smaller than that of the first hole, when the thread on the first hole is matched with the thread on the clamping block and rotated in the fastening direction, the curved surface at the end of each clamping block is matched with the second hole, so that the clamping fixing cavity becomes smaller and the components located in the clamping fixing cavity are clamped and fixed.

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