Three-proofing tablet personal computer with multi-angle adjustable supporting and protecting structure

Abstract

The utility model relates to the technical field of three-proofing tablet personal computers, and discloses a three-proofing tablet personal computer with a multi-angle adjustable support protection structure, which comprises a three-proofing tablet personal computer body, the outer side of the three-proofing tablet personal computer body is fixedly connected with a shell protection silicon rubber case, and the bottom of the shell protection silicon rubber case is provided with a plane rotation adjusting assembly. A supporting angle adjusting assembly is arranged at the bottom of the plane rotating assembly, a supporting telescopic assembly is arranged at the bottom of the supporting angle adjusting assembly, a bottom supporting plate is rotationally connected to the bottom of the supporting telescopic assembly, and a top fixing silica gel plate is fixedly connected to the top face of the shell protection silica gel sleeve. According to the three-proofing tablet personal computer, all the components are matched with one another, so that the angle needed by a rotatable adjustment plane is achieved, angle self-locking is carried out, meanwhile, adjustment and locking of the supporting angle are achieved, and the supporting height can be adjusted according to actual requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to three proof flat computer technical field, concretely is three proof flat computer of support protection structure multi -angle adjustable. BACKGROUND

[0002] In today's digital age, as an important mobile device, the application scene of the tablet computer is expanding, and the performance of the tablet computer is put forward more stringent requirements in special environments such as industrial production, outdoor operation, military operation, and three-proof tablet computers emerge as the times require, however, the existing three-proof tablet computer has many deficiencies in the support protection structure.

[0003] On the one hand, the traditional support structure design is relatively single, the angle adjustment function is limited, most of which can only realize the simple pitch angle adjustment, which cannot meet the diversified use requirements of users in different scenes, for example, in the outdoor strong light environment, the user is difficult to adjust the screen to the best viewing angle, which affects the operation experience and work efficiency, in the vehicle-mounted or other special use scene, the fixed support angle cannot adapt to the complex space layout, in addition, the existing protection structure and support structure are independent of each other, cannot play a synergistic role, it is difficult to protect the device while providing a comfortable use experience, therefore, we put forward the three-proof tablet computer of support protection structure multi -angle adjustable. UTILITY MODEL CONTENT

[0004] (I) technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides the three-proof tablet computer of support protection structure multi -angle adjustable, and solves the above problems.

[0006] (II) technical scheme

[0007] In order to realize the above purpose, the utility model provides the following technical scheme:

[0008] The three-proof tablet computer of support protection structure multi -angle adjustable, including three-proof tablet computer body, the outside fixed connection of three-proof tablet computer body has the shell protection silica gel cover, the bottom of shell protection silica gel cover is provided with plane rotation adjustment assembly, the bottom of plane rotation assembly is provided with support angle adjustment assembly, the bottom of support angle adjustment assembly is provided with support telescopic assembly, the bottom of support telescopic assembly is rotatably connected with bottom support plate, the top surface fixed connection of shell protection silica gel cover has top fixed silica gel plate, the top surface fixed connection of three-proof tablet computer body has top fixed silica gel plate.

[0009] Preferably, the side of the shell protection silica gel cover is provided with a side charging hole, the bottom of the shell protection silica gel cover and the top of the bottom support plate are provided with an internal rotary connection slot, and the bottom of the shell protection silica gel cover and the top of the bottom support plate are fixedly connected with a side clamping frame.

[0010] Preferably, the top of the bottom support plate is provided with a plane rotary adjustment assembly, the top of the bottom plane rotary adjustment assembly is provided with a bottom support angle adjustment assembly, the top of the bottom support adjustment assembly is provided with a support telescopic assembly, the bottom plane rotary adjustment assembly has the same structure as the plane rotary adjustment assembly, and the bottom support angle adjustment assembly has the same structure as the support angle adjustment assembly.

[0011] Preferably, the plane rotary adjustment assembly comprises a plane rotary table, an internal rotary connection table, a clamping spring, a clamping spring, an internal rotary connection table rotatably connected to the inner side of the internal rotary connection slot, a plane rotary table slidably connected to the other end of the internal rotary connection table, a side clamping groove equidistantly distributed on the side of the plane rotary table, a clamping spring fixedly connected to the inner side of the side clamping frame, a clamping spring fixedly connected to the other end of the clamping spring, and a clamping spring slidably connected to the inner side of the side clamping frame.

[0012] Preferably, the support angle adjustment assembly comprises a support angle adjustment locking bolt and a support angle adjustment locking nut, the top of the bottom plane rotary table is fixedly connected with a rotary support table, the inner side of the bottom rotary support table is rotatably connected with a telescopic support bottom rod, the bottom of the top plane rotary table is fixedly connected with a rotary support table, the inner side of the top rotary support table is rotatably connected with a telescopic support top rod, the top end of the rotary support table, the telescopic support top rod and the bottom end of the telescopic support bottom rod are provided with a rotary hole, the inner side of the rotary hole is slidably connected with a support angle adjustment locking bolt, and the rear end of the support angle adjustment locking bolt is threadedly connected with a support angle adjustment locking nut.

[0013] Preferably, the support telescopic assembly comprises a telescopic support top rod, a telescopic support bottom rod, a telescopic adjustment fixed slide rod and an internal telescopic support rod, the side of the telescopic support top rod and the telescopic support bottom rod is provided with equidistantly distributed positioning holes, the side of the internal telescopic support rod is provided with equidistantly distributed sliding holes, the bottom of the telescopic support top rod and the top of the telescopic support bottom rod are provided with a sliding groove, the inner side of the sliding groove is slidably connected with an internal telescopic support rod, the positioning holes and the sliding holes are concentrically aligned, and the inner side of the positioning holes and the sliding holes is slidably connected with a telescopic adjustment fixed slide rod.

[0014] (Three) beneficial effects

[0015] Compared with the prior art, the utility model has the advantages of

[0016] The utility model discloses the effect through plane rotation adjusting component, the angle that rotation adjusts plane needs and carries out angle self -locking, through the effect of supporting angle adjusting component simultaneously, realize the adjustment and locking of supporting angle, through the effect of supporting telescopic component, realize supporting height adjustment according to actual demand. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is whole structure schematic diagram of the utility model;

[0018] Figure 2 It is whole structure split schematic diagram of the utility model;

[0019] Figure 3 It is whole structure cross -section schematic diagram of the utility model;

[0020] Figure 4 It is cross -section schematic diagram of part structure supporting telescopic component in the utility model.

[0021] In the drawing: 1, three waterproof flat panel computer body;2, shell protection silica gel cover;3, side charging hole;4, top fixed silica gel board;5, telescopic support top rod;6, telescopic support bottom rod;7, telescopic adjusting fixed slide bar;8, supporting angle adjusting locking bolt;9, plane rotary table;10, side clamping groove;11, bottom support plate;12, side clamping frame;13, internal rotary connection table;14, clamping slide bar;15, clamping spring;16, supporting angle adjusting locking nut;17, internal rotary connection groove;18, sliding hole;19, positioning hole;20, internal telescopic support rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0024] The application discloses a support protection structure multi-angle adjustable three-proof flat computer, which comprises a three-proof flat computer body 1, an outer shell protection silica gel sleeve 2 fixedly connected to the outer side of the three-proof flat computer body 1, a plane rotation adjusting assembly arranged at the bottom of the outer shell protection silica gel sleeve 2, a support angle adjusting assembly arranged at the bottom of the plane rotation assembly, a support telescopic assembly arranged at the bottom of the support angle adjusting assembly, a bottom support plate 11 rotationally connected to the bottom of the support telescopic assembly, a top fixed silica gel plate 4 fixedly connected to the top surface of the outer shell protection silica gel sleeve 2 and the top surface of the three-proof flat computer body 1.

[0025] Further, a side charging hole 3 is formed in the side surface of the outer shell protection silica gel sleeve 2, an internal rotation connecting groove 17 is formed in the bottom surface of the outer shell protection silica gel sleeve 2 and the top surface of the bottom support plate 11, and a side clamping frame 12 is fixedly connected to the bottom surface of the outer shell protection silica gel sleeve 2 and the top surface of the bottom support plate 11.

[0026] Further, the top surface of the bottom support plate 11 is provided with a plane rotation adjusting assembly, the top of the bottom plane rotation adjusting assembly is provided with a bottom support angle adjusting assembly, the top of the bottom support adjusting assembly is provided with a support telescopic assembly, the bottom plane rotation adjusting assembly is the same as the plane rotation adjusting assembly in structure, and the bottom support angle adjusting assembly is the same as the support angle adjusting assembly in structure.

[0027] Further, the plane rotation adjusting assembly comprises a plane rotation table 9, an internal rotation connecting table 13, a clamping spring 15 and a clamping slide rod 14, the internal rotation connecting table 13 is rotationally connected to the inner side of the internal rotation connecting groove 17, the other end of the internal rotation connecting table 13 is slidably connected with the plane rotation table 9, the side surface of the plane rotation table 9 is provided with equidistantly distributed side clamping grooves 10, the inner side of the side clamping frame 12 is fixedly connected with the clamping spring 15, the other end of the clamping spring 15 is fixedly connected with the clamping slide rod 14, the inner side of the side clamping frame 12 is slidably connected with the clamping slide rod 14, and the inner side of the side clamping groove 10 is slidably connected with the clamping slide rod 14, so that the required angle of rotation adjusting plane is realized and angle self-locking is achieved through the action of the plane rotation adjusting assembly.

[0028] Further, the support angle adjusting assembly comprises a support angle adjusting locking bolt 8 and a support angle adjusting locking nut 16, the top surface of the bottom plane rotating table 9 is fixedly connected with a rotating support table, the inner side of the bottom rotating support table is rotatably connected with an extendable support bottom rod 6, the bottom surface of the top plane rotating table 9 is fixedly connected with a rotating support table, the inner side of the top rotating support table is rotatably connected with an extendable support top rod 5, rotating holes are formed in the top end of the extendable support top rod 5 and the bottom end of the extendable support bottom rod 6 and the rotating support table, the inner side of the rotating hole is slidably connected with the support angle adjusting locking bolt 8, the rear end of the support angle adjusting locking bolt 8 is threadedly connected with the support angle adjusting locking nut 16, and the support angle is adjusted and locked through the action of the support angle adjusting assembly.

[0029] Further, the support extension assembly comprises an extendable support top rod 5, an extendable support bottom rod 6, an extendable adjusting fixed slide rod 7 and an internal extendable support rod 20, equidistantly distributed positioning holes 19 are formed in the side surface of the extendable support top rod 5 and the extendable support bottom rod 6, equidistantly distributed sliding holes 18 are formed in the side surface of the internal extendable support rod 20, a sliding groove is formed in the bottom of the extendable support top rod 5 and the top of the extendable support bottom rod 6, the inner side of the sliding groove is slidably connected with the internal extendable support rod 20, the positioning holes 19 and the sliding holes 18 are concentrically aligned, the inner side of the positioning holes 19 and the sliding holes 18 is slidably connected with the extendable adjusting fixed slide rod 7, and the support height is adjusted according to actual needs through the action of the support extension assembly.

[0030] Structural description:

[0031] The three-proof flat computer body 1 is a core component, has the functions of waterproof, dustproof and drop-proof, the shell is made of high-strength and impact-resistant materials such as reinforced plastic or metal materials, can resist external collision, the internal elements such as processor, display screen and battery are integrated, the elements are compactly and reasonably arranged, connected through the circuit board, and closely connected with the shell protection silica gel sleeve 2 and the top fixed silica gel plate 4, which can not only stabilize itself, but also obtain additional protection by means of external components.

[0032] The shell protection silica gel sleeve 2 is closely attached to the outer side of the three-proof flat computer body 1 and is made of soft and elastic silica gel, the side surface charging hole 3 on the side surface facilitates charging without affecting the protection performance, the bottom surface is connected with the bottom support plate 11 through the internal rotating connection groove 17 and the side surface clamping frame 12, realizes structural connection, and buffers collision, prevents dust and water, and protects the flat computer body 1 in all directions, ensures the safe operation of the equipment in harsh environment.

[0033] Bottom support plate 11: the bottom support plate 11 is the support base of the whole device, usually made of solid plastic or metal, the top surface is provided with a plane rotation adjusting assembly, which is matched with the bottom surface structure of the shell protective silica gel sleeve 2, connected with the upper assembly through the internal rotation connecting groove 17 and the side clamping frame 12, and the bottom is rotationally connected with the support telescopic assembly, ensuring the stability of the overall structure and providing reliable support for the tablet computer;

[0034] Top fixed silica gel plate 4: the top fixed silica gel plate 4 is fixed on the top surface of the three-proof tablet computer body 1 and the shell protective silica gel sleeve 2, made of soft silica gel, which can assist the shell protective silica gel sleeve 2 to further fix the tablet computer body 1, and play a buffering role when subjected to external force impact, reducing damage to the body, and cooperating with the shell protective silica gel sleeve 2 to improve the protection performance of the equipment;

[0035] Plane rotation table 9: the plane rotation table 9 is usually made of high-strength plastic or light metal, has certain strength and rigidity, and can support the tablet computer above, the equidistantly distributed side clamping grooves 10 on the side surface are made by mechanical processing or mold forming process, the spacing and size of the clamping grooves are accurately designed, and the clamping grooves are perfectly matched with the clamping slide rod 14 to realize positioning and locking at different angles;

[0036] Internal rotation connecting table 13: the internal rotation connecting table 13 is generally made of metal material, such as stainless steel or aluminum alloy, the surface thereof is polished to reduce the friction coefficient between the internal rotation connecting table 13 and the internal rotation connecting groove 17, one end thereof is rotationally connected with the internal rotation connecting groove 17 to ensure flexible rotation, and the other end thereof is slidingly connected with the plane rotation table 9 to provide stable support and guidance for the rotation of the plane rotation table 9;

[0037] Clamping slide rod 14: the clamping slide rod 14 is usually a metal rod with smooth surface, the diameter and length of which are designed according to the size of the side clamping frame 12 and the side clamping groove 10, one end of which is connected with the clamping spring 15 and can slide in the side clamping frame 12 under the action of the spring, and the other end of which is inserted into the side clamping groove 10 to realize angle locking and prevent the plane rotation table 9 from being randomly rotated during use;

[0038] Clamping spring 15: the clamping spring 15 is a spiral compression spring made of spring steel, having good elasticity and fatigue resistance, the spring wire diameter, spring coil number and free length and other parameters of which are accurately calculated to ensure that sufficient elastic force is provided while the clamping slide rod 14 can adapt to frequent telescopic actions, so that the clamping slide rod 14 is tightly clamped into the side clamping groove 10 to realize angle self-locking;

[0039] Support angle adjustment locking bolt 8: Support angle adjustment locking bolt 8 is generally a high-strength metal bolt with high thread accuracy to ensure tight cooperation with support angle adjustment locking nut 16. The length of the bolt is designed according to the thickness of rotating support table, telescopic support top rod 5 and telescopic support bottom rod 6. One end passes through the rotating hole, and the other end is threadedly connected with support angle adjustment locking nut 16. By tightening or loosening the nut, the position of the bolt is adjusted, thereby achieving the adjustment and locking of the support angle;

[0040] Support angle adjustment locking nut 16: Support angle adjustment locking nut 16 is used with support angle adjustment locking bolt 8. The metal material used is the same as or compatible with the bolt. The internal thread is accurately matched with the bolt. By rotating the nut, the position of the bolt in the rotating hole can be changed, thereby adjusting the included angle of telescopic support top rod 5 and telescopic support bottom rod 6 to achieve the purpose of adjusting the support angle, and the support angle can be firmly locked after adjustment to prevent the angle from changing;

[0041] Telescopic support top rod 5 and telescopic support bottom rod 6: Telescopic support top rod 5 and telescopic support bottom rod 6 are usually made of metal pipe materials such as aluminum alloy pipe or steel pipe, which have high strength and stability. The equidistantly distributed positioning holes 19 on the side are made by drilling or stamping process. The spacing and diameter of the positioning holes are consistent to ensure accurate cooperation with the sliding holes 18 on the telescopic adjustment fixed slide rod 7 and the internal telescopic support rod 20. The sliding grooves at the top and bottom are formed by mechanical processing for installing the internal telescopic support rod 20 to achieve the adjustment of the support height;

[0042] Telescopic adjustment fixed slide rod 7: Telescopic adjustment fixed slide rod 7 is generally a metal rod with smooth surface and diameter compatible with positioning hole 19 and sliding hole 18. Its length is slightly larger than the sum of the pipe wall thicknesses of telescopic support top rod 5 and telescopic support bottom rod 6, so that it can firmly fix the internal telescopic support rod 20 after being inserted into the positioning hole 19 and sliding hole 18, preventing it from loosening during use and ensuring the stability of the support height;

[0043] Internal telescopic support rod 20: Internal telescopic support rod 20 is made of metal material such as stainless steel or aluminum alloy, which has good strength and corrosion resistance. The equidistantly distributed sliding holes 18 on the side are made by mechanical processing or mold forming process, and are concentrically aligned with positioning hole 19. It slides in the sliding groove of telescopic support top rod 5 and telescopic support bottom rod 6. By inserting or withdrawing telescopic adjustment fixed slide rod 7, it realizes the fixation or separation with telescopic support top rod 5 and telescopic support bottom rod 6, thereby adjusting the support height;

[0044] Working principle: when the user needs to adjust the flat angle of the tablet computer, operate the flat rotation adjusting assembly, press the clamping slide rod 14 to make it shrink inwardly in the side clamping frame 12 against the elastic force of the clamping spring 15, at this time the clamping slide rod 14 is separated from the side clamping groove 10 on the side of the flat rotation table 9, rotate the flat rotation table 9, because the internal rotation connecting table 13 rotates in the internal rotation connecting groove 17, the flat rotation table 9 can rotate flexibly around the internal rotation connecting table 13, drive the tablet computer body to adjust the flat angle, after adjusting to the appropriate angle, release the clamping slide rod 14, the clamping spring 15 resets, pushes the clamping slide rod 14 to re-clamp into the side clamping groove 10, realizes angle self-locking, ensures that the tablet computer maintains stable flat angle during use, when the user needs to adjust the flat angle of the tablet computer, operate the flat rotation adjusting assembly, press the clamping slide rod 14 to make it shrink inwardly in the side clamping frame 12 against the elastic force of the clamping spring 15, at this time the clamping slide rod 14 is separated from the side clamping groove 10 on the side of the flat rotation table 9, rotate the flat rotation table 9, because the internal rotation connecting table 13 rotates in the internal rotation connecting groove 17, the flat rotation table 9 can rotate flexibly around the internal rotation connecting table 13, drive the tablet computer body to adjust the flat angle, after adjusting to the appropriate angle, release the clamping slide rod 14, the clamping spring 15 resets, pushes the clamping slide rod 14 to re-clamp into the side clamping groove 10, realizes angle self-locking, ensures that the tablet computer maintains stable flat angle during use, if you want to adjust the support height, operate the support telescopic assembly, pull out the telescopic adjusting fixed slide rod 7, make it separate from the positioning hole 19 on the side of the telescopic support top rod 5 and the telescopic support bottom rod 6 and the sliding hole 18 on the side of the internal telescopic support rod 20, slide the internal telescopic support rod 20 in the sliding groove of the telescopic support top rod 5 and the telescopic support bottom rod 6, adjust the relative position of the telescopic support top rod 5 and the telescopic support bottom rod 6 according to actual demand, change the support height, after adjusting, insert the telescopic adjusting fixed slide rod 7 into the positioning hole 19 and the sliding hole 18, make the positioning hole 19 and the sliding hole 18 concentric and fixed, complete the adjustment of the support height, meet the requirement of the height of the tablet computer in different use scenarios, during the whole use process, the shell protective silica gel sleeve 2 and the top fixed silica gel plate 4 play a protective role on the three-proofing tablet computer body 1, the shell protective silica gel sleeve 2 can buffer the collision and impact from outside, prevent the tablet computer body 1 from being damaged, the top fixed silica gel plate 4 further fixes the tablet computer body, enhances the protection effect, and the side charging hole 3 on the side of the shell protective silica gel sleeve 2 is convenient for the user to charge the tablet computer during use, does not affect the normal use of the equipment.

[0045] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-angle adjustable three-proof flat computer supporting protection structure, comprising a three-proof flat computer body (1), characterized in that: The outer side of the three-proof flat computer body (1) is fixedly connected with the shell protection silica gel sleeve (2), the bottom of the shell protection silica gel sleeve (2) is provided with a plane rotation adjusting assembly, the bottom of the plane rotation adjusting assembly is provided with a support angle adjusting assembly, the bottom of the support angle adjusting assembly is provided with a support telescopic assembly, the bottom of the support telescopic assembly is rotatably connected with the bottom support plate (11), the top surface of the shell protection silica gel sleeve (2) is fixedly connected with the top fixed silica gel plate (4), and the top surface of the three-proof flat computer body (1) is fixedly connected with the top fixed silica gel plate (4).

2. The support protection structure multi-angle adjustable three-proof flat-panel computer according to claim 1, characterized in that: The side surface of the shell protection silica gel sleeve (2) is provided with a side surface charging hole (3), and the bottom surface of the shell protection silica gel sleeve (2) and the top surface of the bottom support plate (11) are provided with an internal rotary connection groove (17), and the bottom surface of the shell protection silica gel sleeve (2) and the top surface of the bottom support plate (11) are fixedly connected with a side surface clamping frame (12).

3. The multi-angle adjustable three-proof flat-panel computer of claim 2, wherein: The top surface of the bottom support plate (11) is provided with a plane rotation adjusting assembly, the top of the bottom plane rotation adjusting assembly is provided with a bottom support angle adjusting assembly, the top of the bottom support adjusting assembly is provided with a support telescopic assembly, the bottom plane rotation adjusting assembly is the same as the plane rotation adjusting assembly, and the bottom support angle adjusting assembly is the same as the support angle adjusting assembly.

4. The multi-angle adjustable three-proof flat-panel computer of claim 2, wherein: The plane rotation adjusting assembly comprises a plane rotation table (9), an internal rotary connection table (13), a clamping spring (15), an internal rotary connection groove (17), an internal rotary connection table (13) rotatably connected to the inside of the internal rotary connection groove (17), the other end of the internal rotary connection table (13) is slidably connected with the plane rotation table (9), the side surface of the plane rotation table (9) is provided with equidistantly distributed side clamping grooves (10), the inside of the side clamping frame (12) is fixedly connected with the clamping spring (15), the other end of the clamping spring (15) is fixedly connected with the clamping spring (15), the inside of the side clamping frame (12) is slidably connected with the clamping spring (15), and the inside of the side clamping groove (10) is slidably connected with the clamping spring (15).

5. The multi-angle adjustable three-proof flat-panel computer of claim 2, wherein: The support angle adjusting assembly comprises a support angle adjusting locking bolt (8) and a support angle adjusting locking nut (16), the top surface of the bottom plane rotation table (9) is fixedly connected with a rotary support table, the inside of the bottom rotary support table is rotatably connected with a telescopic support bottom rod (6), the bottom surface of the top plane rotation table (9) is fixedly connected with a rotary support table, the inside of the top rotary support table is rotatably connected with a telescopic support top rod (5), the rotary support table, the top end of the telescopic support top rod (5) and the bottom end of the telescopic support bottom rod (6) are provided with rotary holes, the inside of the rotary hole is slidably connected with the support angle adjusting locking bolt (8), and the rear end of the support angle adjusting locking bolt (8) is threadedly connected with the support angle adjusting locking nut (16).

6. The support protection structure multi-angle adjustable three-proof flat-panel computer according to claim 5, characterized in that: Said support telescopic component includes telescopic support top rod (5), telescopic support bottom rod (6), telescopic adjustment fixed slide rod (7), internal telescopic support rod (20), the side of telescopic support top rod (5) and telescopic support bottom rod (6) is equipped with equidistantly distributed positioning hole (19), the side of internal telescopic support rod (20) is equipped with equidistantly distributed sliding hole (18), the bottom of telescopic support top rod (5) is equipped with sliding groove with the top of telescopic support bottom rod (6), the inside of sliding groove is slidably connected with internal telescopic support rod (20), positioning hole (19) and sliding hole (18) are concentrically aligned, the inside of positioning hole (19) and sliding hole (18) is slidably connected with telescopic adjustment fixed slide rod (7).

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