Portable retractable support

Abstract

The utility model relates to the technical field of measuring instruments, in particular to a portable retractable support which comprises a bearing platform and a plurality of supporting leg assemblies, and the upper ends of the supporting leg assemblies are rotationally connected with the lower portion of the bearing platform through connecting bolts. The supporting leg assembly comprises an upper support, a lower support and a foot stool, the upper end of the upper support is rotationally connected with the bearing platform through the connecting bolt, the upper end of the lower support is in sliding connection with the upper support through a sliding assembly, and the upper end of the foot stool is in sliding connection with the lower support through a sliding assembly; the telescopic supporting leg assembly is arranged, the upper support, the lower support and the foot stool of the supporting leg assembly are in sliding connection, complete storage of the support and the foot stool is achieved, the overall size and weight are greatly reduced, the portability is improved, carrying and using are convenient, meanwhile, the sharp part of the foot stool can be completely hidden inside, and the supporting leg assembly is convenient to carry and use. The harm to people and objects in the carrying process is effectively avoided, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to a portable retractable bracket. Background Art

[0002] At present, there are many measuring brackets on the market. As an important engineering measurement equipment, it plays an important role in construction sites, buildings, geological exploration, water conservancy and other fields. Measuring brackets have mature applications both internationally and domestically, but the materials and manufacturing processes used are slightly different, mainly aluminum alloy, carbon fiber, steel and wood materials, each of which has its own advantages. With the continuous advancement of science and technology and the continuous expansion of application fields, the performance requirements of measuring brackets are getting higher and higher. They need to have higher stability and safety to ensure the accuracy and reliability of observation or monitoring data.

[0003] Measuring brackets used in the field of surveying and mapping, especially in construction site monitoring and outdoor geological mapping, can meet the basic requirements of accurate data, but they often bring many inconveniences to engineers due to factors such as heavy weight, large volume, inconvenience in carrying, and sharp tripods that can easily hurt people and objects.

[0004] The disadvantage of the existing technology is that the portable stands that are currently applicable to various complex terrains almost all have one thing in common: the legs are relatively sharp to ensure their stability in various rocky geological environments. Such stands often ignore the storage function of the sharp legs at the bottom, which is inconsistent with safety performance. Moreover, many stands are still large in size or weight after storage, which makes them less portable. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the portable bracket in the prior art is inconvenient to carry, has low safety, insufficient stability, etc. The purpose is to provide a portable retractable bracket that achieves the comprehensive effects of portability, safety, stability, economy and ease of use.

[0006] The utility model is realized by the following technical solutions:

[0007] A portable retractable stand comprises: a support platform and a leg assembly, wherein the upper ends of the plurality of leg assemblies are rotatably connected to the lower part of the support platform through connecting bolts;

[0008] The leg assembly comprises: an upper bracket, a lower bracket and a foot bracket, the upper end of the upper bracket is rotatably connected to the support platform through the connecting bolt, and the upper end of the lower bracket and the upper bracket, and the upper end of the foot bracket and the lower bracket are slidably connected through a sliding assembly;

[0009] When in the retracted state, the lower bracket is arranged inside the upper bracket, and the tripod is arranged inside the lower bracket;

[0010] When in the extended state, the lower end of the lower bracket is arranged outside the upper bracket, and the lower end of the tripod is arranged outside the lower bracket.

[0011] Specifically, the upper bracket includes: an upper top plate, a first upper vertical plate, a second upper vertical plate and an upper bracket protective hoop, the first upper vertical plate and the second upper vertical plate are arranged in parallel, and the upper end of the first upper vertical plate and the upper end of the second upper vertical plate are respectively vertically fixedly connected to the two ends of the upper top plate, the lower end of the first upper vertical plate and the lower end of the second upper vertical plate are respectively vertically fixedly connected to the two ends of the upper bracket protective hoop, a through groove for the lower bracket to pass through is arranged in the upper bracket protective hoop, and the upper top plate is rotatably connected to the base through the connecting bolts;

[0012] The opposing surfaces of the first upper vertical plate and the second upper vertical plate are both provided with upper sliding grooves, and a plurality of upper clamping grooves are sequentially provided in the upper sliding grooves from top to bottom, and the upper end of the lower bracket is clamped with the upper clamping groove through the sliding assembly.

[0013] Optionally, a horizontal upper transverse groove is provided at the upper end of the lower bracket, the sliding assembly is provided in the upper transverse groove, and the sliding assembly comprises: an elastic assembly and a latch, and two latches are respectively fixedly connected to two ends of the elastic assembly;

[0014] In the sliding state, the elastic component is compressed and the latching teeth abut against the upper sliding groove;

[0015] In the non-sliding state, the elastic component is reset, and the latching teeth extend from the upper transverse groove and are inserted into the upper latching groove.

[0016] Optionally, the elastic component includes a linkage pull button and a telescopic spring, the two linkage pull buttons are respectively fixedly connected to two ends of the telescopic spring, and the two latch teeth are respectively fixedly connected to the two linkage pull buttons;

[0017] The side of the lower bracket is provided with a control slot communicating with the upper transverse slot, the sliding part of the linkage button is arranged in the upper transverse slot, and the control part of the linkage button extends out from the control slot;

[0018] When movement is required, forces acting in opposite directions are applied to the two linkage pull buttons.

[0019] Specifically, the lower bracket includes a bracket plate, and the sliding assembly connecting the lower bracket and the upper bracket is arranged at the upper end of the bracket plate, and the interior of the bracket plate is provided with a tripod cavity penetrating its lower end surface, and the side surface of the tripod cavity is provided with a plurality of lower card slots arranged in sequence from top to bottom, the tripod is arranged in the tripod cavity and is slidably connected to the tripod cavity through the sliding assembly, and the upper end of the tripod is engaged with the lower card slot through the sliding assembly.

[0020] Specifically, a horizontal lower transverse groove is provided at the upper end of the tripod, the sliding assembly is arranged in the lower transverse groove, and the sliding assembly comprises: an elastic assembly and a latch, and two latches are respectively fixedly connected to two ends of the elastic assembly;

[0021] In the sliding state, the elastic component is compressed, and the latching teeth abut against the side of the tripod cavity;

[0022] In the non-sliding state, the elastic component is reset, and the latching teeth extend from the lower transverse groove and are inserted into the lower latching groove.

[0023] Specifically, the elastic component includes a linkage pull button and a telescopic spring, the two linkage pull buttons are respectively fixedly connected to the two ends of the telescopic spring, and the two latch teeth are respectively fixedly connected to the two linkage pull buttons;

[0024] A control through groove connected to the tripod cavity is provided on the side of the tripod, the sliding part of the linkage button is provided in the lower horizontal groove, and the control part of the linkage button extends out from the control through groove; the control through groove includes a control vertical groove and a control horizontal groove, and a plurality of control horizontal grooves are respectively provided corresponding to the lower card groove, the control vertical groove is connected to the control horizontal groove, and when the elastic component slides, the linkage button is located in the control vertical groove; when the elastic component does not slide, the linkage button is located in the control horizontal groove.

[0025] Furthermore, the lower bracket also includes a positioning vertical plate, which is arranged in the tripod cavity and fixedly connected to the upper side surface of the tripod cavity. The upper end surface of the tripod is provided with a positioning groove corresponding to the positioning vertical plate, and the positioning vertical plate is inserted into the positioning groove and slides in the positioning groove.

[0026] Optionally, the lower bracket further includes an anti-skid foot pedal, which is fixedly connected to the lower portion of the bracket plate, and the anti-skid foot pedal and the linkage pull button are located on the same side of the bracket plate.

[0027] Optionally, a sliding roller is connected to the latch tooth.

[0028] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0029] The utility model realizes complete storage of the bracket and the tripod by providing a retractable leg assembly and a sliding connection between the upper bracket, the lower bracket and the tripod of the leg assembly, which greatly reduces the overall volume and weight, improves portability, and is easy to carry and use. At the same time, the sharp parts of the tripod can be completely hidden inside, effectively avoiding damage to people and objects during carrying and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation on the embodiments of the present invention.

[0031] Figure 1 It is a structural schematic diagram of a portable retractable bracket according to the utility model.

[0032] Figure 2 It is a front view of a portable retractable bracket according to the utility model.

[0033] Figure 3 It is a side view of a portable retractable bracket according to the utility model.

[0034] Figure 4 It is an exploded front view of the leg assembly according to the utility model.

[0035] Figure 5 It is an exploded side view of the leg assembly according to the utility model.

[0036] Figure numerals: 1-base, 2-connecting bolt, 3-upper bracket, 4-lower bracket, 5-foot bracket, 6-sliding assembly, 31-upper top plate, 32-first upper vertical plate, 33-second upper vertical plate, 34-upper sliding groove, 35-upper clamping groove, 36-upper bracket guard hoop, 41-bracket plate, 42-lower clamping groove, 43-control vertical groove, 44-control horizontal groove, 45-anti-slip foot pedal, 61-linkage pull button, 62-telescopic spring, 63-clamping tooth, 64-sliding roller. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific implementation methods described here are only used to explain the relevant content, rather than to limit the utility model.

[0038] It should also be noted that, for the convenience of description, only the parts related to the present utility model are shown in the drawings.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Embodiment 1

[0043] like Figure 1 As shown, a portable retractable stand comprises: a support platform 1 and a leg assembly, wherein the upper ends of the plurality of leg assemblies are rotatably connected to the lower part of the support platform 1 through a connecting bolt 2; the support platform 1 is an important structure for connecting measuring equipment such as a level and a theodolite and a lower tripod 5. The upper end of the leg assembly is rotatably connected to the lower part of the support platform 1 through a connecting bolt 2, so that the leg assembly can rotate around the connecting bolt 2, thereby realizing the expansion and contraction of the leg assembly. In actual use, the number of leg assemblies can be flexibly selected according to needs, thereby forming a tripod, a quadripod, a pentapod, or the like.

[0044] The leg assembly includes: an upper bracket 3, a lower bracket 4 and a foot frame 5. The upper end of the upper bracket 3 is rotatably connected to the support 1 through a connecting bolt 2, and the upper end of the lower bracket 4 and the upper bracket 3, and the upper end of the foot frame 5 and the lower bracket 4 are slidably connected through a sliding assembly 6.

[0045] When in the retracted state, the lower bracket 4 is arranged inside the upper bracket 3, and the tripod 5 is arranged inside the lower bracket 4; when the tripod 5 is in the retracted state, the lower bracket 4 is stored inside the upper bracket 3, and the tripod 5 is stored inside the lower bracket 4. This design allows the tripod 5 to be greatly reduced in size when not in use, making it easy to carry and store.

[0046] When in the extended state, the lower end of the lower bracket 4 is arranged outside the upper bracket 3, and the lower end of the tripod 5 is arranged outside the lower bracket 4. Through the sliding connection of the sliding assembly 6, the bracket and the tripod 5 can slide out smoothly from the inside to form a stable supporting structure.

[0047] Embodiment 2

[0048] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the upper bracket 3 includes: an upper top plate 31, a first upper vertical plate 32, a second upper vertical plate 33 and an upper bracket protective hoop 36. The first upper vertical plate 32 and the second upper vertical plate 33 are arranged in parallel, and the upper end of the first upper vertical plate 32 and the upper end of the second upper vertical plate 33 are respectively vertically fixedly connected to the two ends of the upper top plate 31, and the lower end of the first upper vertical plate 32 and the lower end of the second upper vertical plate 33 are respectively vertically fixedly connected to the two ends of the upper bracket protective hoop 36. A through groove for the lower bracket 4 to pass through is provided in the upper bracket protective hoop 36, and the upper bracket protective hoop 36 is rotatably connected to the base 1 by the connecting bolt 2; the upper top plate 31, the first upper vertical plate 32 and the second upper vertical plate 33 can adopt an integrated structure, that is, an n-shaped plate body is adopted, and upper sliding grooves 34 are provided on the inner sides of the two vertical sides of the n-shaped plate body, and the upper sliding grooves 34 are blocked by the upper bracket protective hoop 36 to prevent the lower bracket 4 from sliding out of the upper sliding grooves 34.

[0049] The opposing surfaces of the first upper vertical plate 32 and the second upper vertical plate 33 are both provided with upper sliding grooves 34 , and a plurality of upper clamping grooves 35 are sequentially provided in the upper sliding grooves 34 from top to bottom. The upper end of the lower bracket 4 is clamped with the upper clamping grooves 35 through the sliding assembly 6 .

[0050] The upper end of the lower bracket 4 is provided with a horizontal upper transverse groove, and the sliding assembly 6 is arranged in the upper transverse groove. The sliding assembly 6 includes: an elastic assembly and a latch 63, and the two latches 63 are respectively fixedly connected to the two ends of the elastic assembly;

[0051] In the sliding state, the elastic component is compressed, and the latching teeth 63 abut against the upper sliding groove 34 ; at this time, the lower bracket 4 can slide in the upper sliding groove 34 .

[0052] In the non-sliding state, the elastic component is reset, the latching teeth 63 extend from the upper transverse groove and insert into the upper latching groove 35 , and the lower bracket 4 is fixed at the corresponding position to prevent loosening.

[0053] The stability and portability of the tripod 5 are achieved through the combination of the upper bracket 3, the lower bracket 4 and the sliding assembly 6. Specifically, the upper bracket 3 provides a stable frame structure through the cooperation of the upper top plate 31, the first upper vertical plate 32, the second upper vertical plate 33 and the upper bracket hoop 36. The upper end of the lower bracket 4 is provided with a horizontal upper transverse groove, which is engaged with the upper slot 35 of the upper bracket 3 through the sliding assembly 6, so that the telescopic function of the lower bracket 4 is achieved.

[0054] During use, the sliding state and non-sliding state of the sliding component 6 can be switched by operating the elastic component, so that the lower bracket 4 can be freely extended and fixed at a desired position. This design not only ensures the stability of the tripod 5, but also improves its portability, and is suitable for various measurement and monitoring occasions.

[0055] In actual use, the user can realize the extension and retraction of the bracket and the tripod 5 by operating the linkage pulling and twisting, thereby ensuring the stability and reliability of the tripod 5 under different terrain conditions. After completing the measurement work, the user can store the tripod 5 and the bracket to the smallest volume through the reverse operation steps, which is convenient for carrying and storage.

[0056] By providing a plurality of upper card slots 35, the relative position between the upper bracket 3 and the lower bracket 4 can be flexibly changed. By cooperating with the sliding assembly 6 and the card slot structure, the user can easily adjust the height and position of the tripod 5 to ensure stable use in various environments.

[0057] In addition, the elastic component in this embodiment includes a linkage button 61 and a telescopic spring 62, the two linkage buttons 61 are respectively fixedly connected to the two ends of the telescopic spring 62, and the two latch teeth 63 are respectively fixedly connected to the two linkage buttons 61;

[0058] The side of the lower bracket 4 is provided with a control slot connected to the upper transverse slot, the sliding part of the linkage button 61 is arranged in the upper transverse slot, and the control part of the linkage button 61 extends out of the control slot, which is convenient for user operation. When movement is required, the two linkage buttons 61 are applied with opposing forces, so that the telescopic spring 62 is compressed, the latching teeth 63 are withdrawn from the latching slot, and the lower bracket 4 can slide freely in the upper transverse slot.

[0059] The actual operation steps are as follows: the user applies opposing forces to the two linkage buttons 61 to compress the telescopic spring 62 and withdraw the latching teeth 63 from the slot. After the latching teeth 63 withdraw from the slot, the latching teeth 63 abut against the upper sliding slot 34, so that the lower bracket 4 can slide freely up and down in the upper sliding slot 34, and the lower bracket 4 is stretched to the desired position. The linkage button 61 is released, the telescopic spring 62 is reset, and the latching teeth 63 enter the new slot to fix the position of the lower bracket 4.

[0060] Embodiment 3

[0061] In practice, the lower bracket 4 may also adopt the same structure as the upper bracket 3, but in this embodiment Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a different structure is provided, the lower bracket 4 includes a bracket plate 41, the sliding assembly 6 connecting the lower bracket 4 and the upper bracket 3 is arranged at the upper end of the bracket plate 41, the bracket plate 41 is provided with a tripod 5 cavity penetrating the lower end surface thereof, the side of the tripod 5 cavity is provided with a plurality of lower clamping grooves 42 arranged in sequence from top to bottom, the tripod 5 is arranged in the tripod 5 cavity and is slidably connected with the tripod 5 cavity through the sliding assembly 6, and the upper end of the tripod 5 is clamped with the lower clamping groove 42 through the sliding assembly 6. The bracket plate 41 provides the main structural support for the lower bracket 4, and the tripod 5 cavity provides space for the storage and movement of the tripod 5. The lower clamping grooves 42 are arranged along the side of the tripod 5 cavity, so that the tripod 5 can be fixed at different heights.

[0062] The upper end of the tripod 5 is provided with a horizontal lower transverse groove, and the sliding assembly 6 is arranged in the lower transverse groove. The sliding assembly 6 includes: an elastic assembly and a latch 63, and the two latches 63 are respectively fixedly connected to the two ends of the elastic assembly;

[0063] In the sliding state, the elastic component is compressed, and the latching teeth 63 abut against the side of the cavity of the tripod 5;

[0064] In the non-sliding state, the elastic component is reset, and the latching teeth 63 extend from the lower transverse groove and are inserted into the lower latching groove 42 .

[0065] The sliding connection between the tripod 5 and the lower bracket 4 is similar to the connection between the lower bracket 4 and the upper bracket 3. The user applies opposite forces to the elastic component to compress it, and the latch tooth 63 withdraws from the lower slot 42. The tripod 5 is in a sliding state, so that the tripod 5 slides from the cavity of the tripod 5 and finally slides to the desired position. The force is released, the elastic component is reset, and the latch tooth 63 is inserted into a new lower slot 42 to fix the position of the tripod 5.

[0066] In addition, an elastic component identical to that of the second embodiment is provided, which includes a linkage button 61 and a telescopic spring 62, wherein the two linkage buttons 61 are respectively fixedly connected to the two ends of the telescopic spring 62, and the two latch teeth 63 are respectively fixedly connected to the two linkage buttons 61;

[0067] A control through groove connected to the cavity of the tripod 5 is provided on the side of the tripod 5, and the sliding part of the linkage button 61 is arranged in the lower horizontal groove, and the control part of the linkage button 61 extends out from the control through groove; the control through groove includes a control vertical groove 43 and a control horizontal groove 44, and multiple control horizontal grooves 44 are respectively arranged corresponding to the lower card groove 42, and the control vertical groove 43 is connected to the control horizontal groove 44. When the elastic component slides, the linkage button 61 is located in the control vertical groove 43; when the elastic component does not slide, the linkage button 61 is located in the control horizontal groove 44.

[0068] Because the entire tripod 5 is arranged in the lower bracket 4, in order to be able to control the elastic component of the tripod 5, it is necessary to set a control vertical groove 43 and a control horizontal groove 44 on the side of the bracket plate 41, so as to realize the control of the linkage button 61.

[0069] When the tripod 5 needs to be moved up and down, the linkage button 61 is squeezed to shorten the distance between the two latch teeth 63, and then it is slid up and down in the control vertical groove 43. When it slides to the position corresponding to the latch slot, the linkage button 61 slides in the control horizontal groove 44, thereby changing the position of the tripod 5.

[0070] In addition, in order to increase the sliding stability of the tripod 5, the lower bracket 4 also includes a positioning vertical plate, which is arranged in the cavity of the tripod 5 and fixedly connected to the upper side of the cavity of the tripod 5. The upper end surface of the tripod 5 is provided with a positioning groove corresponding to the positioning vertical plate. The positioning vertical plate is inserted into the positioning groove and slides in the positioning groove.

[0071] That is, the positioning vertical plate is used as a guide rod to guide and limit the tripod 5.

[0072] The size of each component in the utility model can be adjusted according to the specific situation, and finally the entire tripod 5 is stored in the lower bracket 4, and the entire lower bracket 4 is stored in the upper bracket 3. Finally, the height of the entire bracket after storage is equal to the sum of the heights of the support platform 1 and the upper bracket 3.

[0073] Finally, the lower bracket 4 further includes an anti-skid footrest 45, which is fixedly connected to the lower part of the bracket plate 41, and the anti-skid footrest 45 and the linkage button 61 are located on the same side of the bracket plate 41. The anti-skid footrest 45 can be stepped on to facilitate the insertion of the bracket 5 into the ground, and the linkage button 61 can also be limited to prevent the linkage button 61 from moving to the lower part of the lower bracket 4 and affecting its stability.

[0074] The latching teeth 63 are connected with a sliding roller 64, and by providing the sliding roller 64, the sliding friction between the latching teeth 63 and the upper sliding groove 34 can be changed into rolling friction, so as to facilitate sliding. Similarly, the sliding friction between the latching teeth 63 and the cavity of the tripod 5 can be changed into rolling friction.

[0075] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above utility model, and these changes or modifications are still within the scope of the present utility model.

Claims

1. A portable retractable stand, characterized in that: include: A support platform (1) and a leg assembly, wherein the upper ends of the plurality of leg assemblies are rotatably connected to the lower portion of the support platform (1) via connecting bolts (2); The leg assembly comprises: an upper bracket (3), a lower bracket (4) and a foot bracket (5); the upper end of the upper bracket (3) is rotatably connected to the support platform (1) via the connecting bolt (2); the upper end of the lower bracket (4) and the upper bracket (3), and the upper end of the foot bracket (5) and the lower bracket (4) are slidably connected via a sliding assembly (6); When in the retracted state, the lower bracket (4) is arranged inside the upper bracket (3), and the tripod (5) is arranged inside the lower bracket (4); When in the extended state, the lower end of the lower bracket (4) is arranged outside the upper bracket (3), and the lower end of the tripod (5) is arranged outside the lower bracket (4).

2. A portable retractable stand according to claim 1, characterized in that: The upper bracket (3) comprises: an upper top plate (31), a first upper vertical plate (32), a second upper vertical plate (33) and an upper bracket protective hoop (36); the first upper vertical plate (32) and the second upper vertical plate (33) are arranged in parallel, and the upper end of the first upper vertical plate (32) and the upper end of the second upper vertical plate (33) are respectively vertically fixedly connected to the two ends of the upper top plate (31); the lower end of the first upper vertical plate (32) and the lower end of the second upper vertical plate (33) are respectively vertically fixedly connected to the two ends of the upper bracket protective hoop (36); a through groove for the lower bracket (4) to pass through is arranged in the upper bracket protective hoop (36); the upper top plate (31) is rotatably connected to the support platform (1) through the connecting bolts (2); The opposing surfaces of the first upper vertical plate (32) and the second upper vertical plate (33) are both provided with an upper sliding groove (34), and a plurality of upper clamping grooves (35) are sequentially provided in the upper sliding groove (34) from top to bottom, and the upper end of the lower bracket (4) is clamped with the upper clamping groove (35) through the sliding assembly (6).

3. A portable retractable stand according to claim 2, characterized in that: The upper end of the lower bracket (4) is provided with a horizontal upper transverse groove, the sliding component (6) is arranged in the upper transverse groove, and the sliding component (6) comprises: an elastic component and a latching tooth (63), and the two latching teeth (63) are respectively fixedly connected to the two ends of the elastic component; In the sliding state, the elastic component is compressed and the latching tooth (63) abuts against the upper sliding groove (34); In the non-sliding state, the elastic component is reset, and the latching tooth (63) extends from the upper transverse groove and is inserted into the upper latching groove (35).

4. A portable retractable stand according to claim 3, characterized in that: The elastic component comprises a linkage pull button (61) and a telescopic spring (62), the two linkage pull buttons (61) are respectively fixedly connected to two ends of the telescopic spring (62), and the two latch teeth (63) are respectively fixedly connected to the two linkage pull buttons (61); The side surface of the lower bracket (4) is provided with a control through groove which is in communication with the upper transverse groove, the sliding part of the linkage pull button (61) is arranged in the upper transverse groove, and the control part of the linkage pull button (61) extends out from the control through groove; When movement is required, forces acting in opposite directions are applied to the two linkage pull buttons (61).

5. A portable retractable stand according to claim 1, characterized in that: The lower bracket (4) comprises a bracket plate (41); a sliding assembly (6) connecting the lower bracket (4) and the upper bracket (3) is arranged at the upper end of the bracket plate (41); a tripod (5) cavity penetrating the lower end surface thereof is arranged inside the bracket plate (41); a plurality of lower clamping grooves (42) arranged in sequence from top to bottom are arranged on the side of the tripod (5) cavity; the tripod (5) is arranged in the tripod (5) cavity and is slidably connected to the tripod (5) cavity through the sliding assembly (6); and the upper end of the tripod (5) is clamped with the lower clamping groove (42) through the sliding assembly (6).

6. A portable retractable stand according to claim 5, characterized in that: The upper end of the tripod (5) is provided with a horizontal lower transverse groove, the sliding assembly (6) is arranged in the lower transverse groove, and the sliding assembly (6) comprises: an elastic assembly and a latching tooth (63), and the two latching teeth (63) are respectively fixedly connected to the two ends of the elastic assembly; In the sliding state, the elastic component is compressed, and the latching teeth (63) abut against the side of the cavity of the tripod (5); In the non-sliding state, the elastic component is reset, and the latching tooth (63) extends from the lower transverse groove and is inserted into the lower latching groove (42).

7. A portable retractable stand according to claim 6, characterized in that: The elastic component comprises a linkage pull button (61) and a telescopic spring (62), the two linkage pull buttons (61) are respectively fixedly connected to two ends of the telescopic spring (62), and the two latch teeth (63) are respectively fixedly connected to the two linkage pull buttons (61); The side of the tripod (5) is provided with a control through groove which is communicated with the cavity of the tripod (5); the sliding part of the linkage pull button (61) is arranged in the lower transverse groove, and the control part of the linkage pull button (61) extends out from the control through groove; the control through groove comprises a control vertical groove (43) and a control transverse groove (44); a plurality of the control transverse grooves (44) are respectively arranged corresponding to the lower clamping groove (42); the control vertical groove (43) is communicated with the control transverse groove (44); when the elastic component slides, the linkage pull button (61) is located in the control vertical groove (43); when the elastic component does not slide, the linkage pull button (61) is located in the control transverse groove (44).

8. The portable retractable stand according to claim 5, characterized in that: The lower bracket (4) also includes a positioning vertical plate, which is arranged in the cavity of the tripod (5) and fixedly connected to the upper side of the cavity of the tripod (5). The upper end surface of the tripod (5) is provided with a positioning groove corresponding to the positioning vertical plate, and the positioning vertical plate is inserted into the positioning groove and slides in the positioning groove.

9. A portable retractable stand according to claim 7, characterized in that: The lower bracket (4) further comprises an anti-skid footrest (45), wherein the anti-skid footrest (45) is fixedly connected to the lower part of the bracket plate (41), and the anti-skid footrest (45) and the linkage pull button (61) are located on the same side of the bracket plate (41).

10. A portable retractable stand according to claim 3 or 6, characterized in that: The latching teeth (63) are connected to a sliding roller (64).

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