CN216668473U - Stand assembly structure and automobile-used calibrating device - Google Patents

Abstract

The application provides a vertical frame assembly structure and a vehicle calibration device, wherein the vertical frame assembly structure is used for mounting a target, and the target comprises a substrate and a plurality of hanging buckles arranged on the substrate; the vertical frame assembly structure comprises a support frame and a plurality of hanging frames, wherein the hanging frames are divided into two groups, and one group of hanging frames is arranged on the support frame along a first direction; the other group of hanging racks are arranged on the supporting frame along the second direction. This application sets up a set of stores pylon through following the first direction on the support frame, sets up another a set of stores pylon along the second direction on the support frame, and two sets of stores pylons can be respectively with a plurality of hanging the lock-joint cooperation carry. The target with the longer length can be hung on the support frame along the first direction through the hanging buckles, and the target with the longer width can be hung on the support frame along the second direction through the hanging buckles; also, the mounting direction of the same target can be switched between the first direction and the second direction. Therefore, the stand assembly structure that this application provided can carry the not mark target of equidimension, and adaptability is good.

Description

Stand assembly structure and automobile-used calibrating device

Technical Field

The present application belongs to the technical field of vehicles, and more particularly, to a stand assembly structure and a vehicle calibration device using the same.

Background

The calibration device for a vehicle is a device for calibrating the installation position of a driving assistance system of the vehicle. Before the calibration of the calibration device for a vehicle, a plurality of calibration units on the calibration device for a vehicle, such as a camera, a sensor, etc., are usually calibrated by a target, so as to improve the calibration accuracy of the calibration device for a vehicle.

At present, the mark target is usually installed on the support frame, and to the mark target of equidimension not, need supporting the support frame that sets up unidimensional not to support, this just leads to the unable compatible mark target of equidimension not of support frame, and the adaptability of support frame is relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the present application is to provide a stand assembly structure and a vehicle calibration device, so as to solve the problems existing in the related art: the unable compatible mark target of different sizes of support frame leads to the poor problem of adaptability of support frame.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in one aspect, a stand assembly structure is provided for mounting a target, the target comprising a substrate and a plurality of fasteners mounted on the substrate; the stand assembly structure includes:

a support frame;

the hanging racks are divided into two groups, one group of hanging racks is arranged on the support frame along a first direction, and the other group of hanging racks is used for being matched with the hanging buckles for hanging so that the target is hung on the support frame along the first direction; the other group of hangers are arranged on the support frame along a second direction, and the other group of hangers are used for being matched with the plurality of hanging buckles for hanging, so that the target is hung on the support frame along the second direction.

This structure, this application sets up a set of stores pylon through following the first direction on the support frame, sets up another a set of stores pylon along the second direction on the support frame, and two sets of stores pylons can be respectively with a plurality of knot cooperation carry of hanging. The target with the longer length can be hung on the support frame along the first direction through the hanging buckles, and the target with the longer width can be hung on the support frame along the second direction through the hanging buckles; also, the mounting direction of the same target can be switched between the first direction and the second direction. Therefore, the stand assembly structure that this application provided can carry the not mark target of equidimension, and adaptability is good.

In one embodiment, the support frame comprises a first support frame body and a second support frame body connected with the first support frame body, the length direction of the first support frame body is arranged along the first direction, and a group of hangers is mounted on the first support frame body; the length direction of the second support frame body is arranged along the second direction, and the second support frame body is provided with another group of hangers.

This structure can support and carry the target in the first direction through first support body, can support and carry the target in the second direction through the second support body.

In one embodiment, the first support frame comprises two vertical beams arranged oppositely and a plurality of cross beams connecting the two vertical beams, and a group of hangers are respectively mounted on the plurality of cross beams; the second support frame body is including installing in a supporting beam on the first support frame body, two are stretched out respectively at the both ends of a supporting beam erect the roof beam, the second support frame body still including with the both ends of a supporting beam respectively with two erect two tie-beams that the roof beam is connected, another group the stores pylon install respectively in a supporting beam and two on the tie-beam.

This structure, can enclose the square structure that synthetic length direction set up along the first direction between two perpendicular roof beams, a plurality of crossbeams and the supporting beam, help improving the structural strength of first support frame body. Can enclose the structure that sets up along the second direction between supporting beam, two tie-beams and two perpendicular roof beams into length direction, help improving the structural strength of second support frame body.

In one embodiment, each of the connecting beams includes a first connecting main beam and a second connecting main beam, one end of the first connecting main beam is connected to the supporting beam, the other end of the first connecting main beam is connected to one end of the second connecting main beam, and the other end of the second connecting main beam is connected to the corresponding vertical beam; and the second connecting main beams are provided with the hanging racks.

This structure is connected the girder through first connection girder and second and is connected the both ends of a supporting beam with two respectively and erect the roof beam and be connected, helps improving the overall structure intensity of support frame.

In one embodiment, the support frame further comprises a handle mounted on the first support frame body.

On one hand, the structure is convenient for taking and placing the support frame; on the other hand, when the stand assembly structure is installed on the vehicle calibration device, the handle can be used as a handle, so that the vehicle calibration device can be conveniently pushed and pulled.

In one embodiment, each hanging buckle comprises a mounting piece mounted on the substrate, a blocking piece arranged opposite to the mounting piece, and a connecting guide pillar connecting the mounting piece and the blocking piece; each hanger comprises a first base installed on the support frame and a second base installed on the first base, a groove used for allowing the corresponding connecting guide pillar to extend into is formed in the second base, and a step portion used for being matched and abutted with the corresponding abutting piece is formed between the second base and the first base.

According to the structure, the support and the positioning of the support frame on the substrate can be realized by extending each connecting guide pillar into the corresponding groove; through the resisting cooperation of each resisting separation blade and the corresponding step part, each hanging buckle can be hung on the hanging frame.

In one embodiment, a side of each first base facing away from the supporting frame is coplanar with a side of the corresponding second base facing away from the supporting frame.

This structure can guarantee that each stores pylon keeps the level towards the side of corresponding installation piece to make each stores pylon and corresponding installation piece laminating inseparable, help improving the position accuracy of mark target mount on the support frame.

In one embodiment, the thickness of each first base is greater than the thickness of the corresponding second base.

In the structure, the thickness difference between each first base and the corresponding second base can form a space for the corresponding blocking piece to extend into, so that each blocking piece is matched with the corresponding step part for blocking.

In one embodiment, each of the blocking pieces and the corresponding connecting guide pillar are integrally formed.

This structure helps improving the whole mechanical strength who hangs the knot, and the processing preparation of being convenient for is efficient.

In another aspect, a calibration device for a vehicle is provided, which includes the stand assembly structure provided in any of the above embodiments.

This structure adopts above-mentioned grudging post package assembly's automobile-used calibrating device, can be according to the size of a dimension of mark target, hangs mark target of different sizes and sizes on the support frame along first direction or second direction to make the compatible mark target of different sizes and sizes of support frame, adaptability is good.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a perspective view of a stand assembly structure of a target mounted on a support frame in a first direction according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view illustrating a connection structure between a support frame and a plurality of hangers according to an embodiment of the present application;

FIG. 3 is an enlarged schematic view at A in FIG. 1;

fig. 4 is an exploded view of the position of the hanging buckle mounted on the substrate according to the embodiment of the present disclosure;

fig. 5 is a schematic perspective structure view of a hanger according to an embodiment of the present application.

Wherein, in the drawings, the reference numerals are mainly as follows:

1. a target; 11. a substrate; 12. hanging and buckling; 121. mounting a sheet; 122. supporting the blocking piece; 123. connecting the guide post;

2. a support frame; 21. a first support frame body; 211. erecting a beam; 212. a cross beam; 22. a second support frame body; 221. a support beam; 222. a connecting beam; 223. a first connecting main beam; 224. a second connecting main beam; 23. a handle; 24. a fastener;

3. a hanger; 31. a first base; 310. mounting holes; 32. a second base; 321. a groove; 33. a step portion.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

For convenience of description, two coordinate axes which are spatially perpendicular to each other are defined as an X axis and a Y axis respectively, and the X axis and the Y axis are two coordinate axes which are perpendicular to each other on the same horizontal plane.

Referring to fig. 1 and 3, a stand assembly structure according to an embodiment of the present application will now be described. The stand assembling structure is used for mounting the target 1, the target 1 comprises a substrate 11 and a plurality of hanging buckles 12 installed on the substrate 11, and the substrate 11 can be used for aligning and correcting a plurality of calibration units on the vehicle calibration device, so that the calibration precision of the vehicle calibration device is improved. The stand assembly structure includes support frame 2 and a plurality of stores pylon 3 of installing on support frame 2, and a plurality of stores pylon 3 divide into two sets ofly, and a set of stores pylon 3 is installed on support frame 2 along the first direction (being the X axle direction in the figure, lower with), and this group of stores pylon 3 is used for hanging with a plurality of buckles 12 cooperation to carry to make mark target 1 hang on support frame 2 along the first direction. Another set of hangers 3 is mounted on the supporting frame 2 along a second direction (i.e. the Y-axis direction in the figure, the same below), and the set of hangers 3 is used for being mounted on the plurality of hanging buckles 12 in a matching manner, so that the target 1 is mounted on the supporting frame 2 along the second direction. Here, the number of the respective sets of hangers 3 may be larger than or equal to the number of the plurality of hangers 12. When the number of each group of hangers 3 is greater than the number of the plurality of hanging buckles 12, the target 1 can be hung on different positions of the support frame 2 by hanging the plurality of hanging buckles 12 on different hangers 3. When the number of each set of hangers 3 is equal to the number of the plurality of hanging buckles 12, that is, the positions of each set of hangers 3 and the positions of the plurality of hanging buckles 12 are arranged in one-to-one correspondence. The first direction can be perpendicular to the second direction, so that the mounting direction of the target 1 on the support frame 2 can be adjusted conveniently. In other embodiments, the first direction may be inclined to the second direction, which is not limited herein.

This structure, this application sets up a set of stores pylon 3 through following the first direction on support frame 2, sets up another set of stores pylon 3 along the second direction on support frame 2, and two sets of stores pylons 3 can be respectively with a plurality of buckles 12 cooperation carry. The target 1 with longer length can be hung on the support frame 2 along a first direction through a plurality of hanging buckles 12, and the target 1 with longer width can be hung on the support frame 2 along a second direction through a plurality of hanging buckles 12; also, the mounting direction of the same target 1 can be switched between the first direction and the second direction. Therefore, the stand assembly structure provided by the application can mount the targets 1 with different sizes, and the adaptability is good.

In an embodiment, referring to fig. 2, as a specific implementation manner of the stand assembly structure provided in the embodiment of the present application, the support frame 2 includes a first support frame body 21 and a second support frame body 22 connected to the first support frame body 21, a length direction of the first support frame body 21 is arranged along a first direction, and a set of hangers 3 is mounted on the first support frame body 21; the length direction of the second support frame body 22 is arranged along the second direction, and another group of hangers 3 are mounted on the second support frame body 22. Specifically, the support frame 2 may have a T-shaped structure, so that the target 1 can be mounted in the first direction and the second direction. With this structure, the target 1 can be supported and mounted in the first direction by the first support frame 21, and the target 1 can be supported and mounted in the second direction by the second support frame 22.

In an embodiment, please refer to fig. 2, as a specific implementation manner of the stand assembly structure provided in the embodiment of the present application, the first support frame body 21 includes two vertical beams 211 oppositely disposed and a plurality of cross beams 212 connecting the two vertical beams 211, and the set of hangers 3 are respectively mounted on the plurality of cross beams 212; the second support frame body 22 includes a support beam 221 installed on the first support frame body 21, two vertical beams 211 respectively extending from both ends of the support beam 221, two connection beams 222 connecting both ends of the support beam 221 with the two vertical beams 211, respectively, and the other set of hangers 3 are installed on the support beam 221 and the two connection beams 222, respectively. Specifically, two vertical beams 211 are arranged in parallel at intervals, and each vertical beam 211 is perpendicular to the support beam 221. The number of the cross members 212 may be two, wherein one cross member 212 connects one end of each of the vertical beams 211 remote from the support beam 221, and the other cross member 212 is located between the one cross member 212 and the support beam 221, which contributes to the improvement of the structural strength of the first support frame body 21. Each beam 212 can be provided with a plurality of hangers 3, so that the hangers can be matched with a plurality of buckles 12 for hanging. A plurality of hanging racks 3 can be arranged on the parts of the supporting beams 221 corresponding to the cross beams 212; when the target 1 is hung on the first support frame 21 in the first direction, the plurality of hanging hooks 12 may also be hung on the plurality of hanging frames 3 on the support beam 221. The parts of the support beam 221 extending out of the two cross beams 212 are respectively provided with a hanging rack 3; correspondingly, each connecting beam 222 is correspondingly provided with a hanging rack 3, so that the target 1 can be hung on the second support frame 22 along the second direction. This structure, can enclose the square structure that synthetic length direction set up along first direction between two perpendicular roof beams 211, a plurality of crossbeam 212 and the supporting beam 221, the structural strength of first support body 21 is big, is convenient for to mark target 1 along the support and the carry of first direction. The supporting beam 221, the two connecting beams 222 and the two vertical beams 211 can enclose a structure which is arranged along the second direction in the length direction, and the second supporting frame body 22 is high in structural strength and convenient to support and mount the target 1 along the second direction.

In an embodiment, referring to fig. 2, as a specific implementation manner of the erection assembly structure provided in the embodiment of the present application, each connection beam 222 includes a first connection main beam 223 and a second connection main beam 224, one end of the first connection main beam 223 is connected to the support beam 221, the other end of the first connection main beam 223 is connected to one end of the second connection main beam 224, and the other end of the second connection main beam 224 is connected to the corresponding vertical beam 211; each second connecting main beam 224 is provided with a hanging rack 3. Specifically, two first connection main beams 223 and two vertical beams 211 are arranged in parallel at intervals, and each first connection main beam 223 is perpendicular to the support beam 221. Each second connecting main beam 224 is parallel to the support beam 221, and each second connecting main beam 224 is perpendicular to the corresponding first connecting main beam 223 and the corresponding vertical beam 211, respectively. In the structure, the two ends of the support beam 221 are respectively connected with the two vertical beams 211 through the first connecting main beam 223 and the second connecting main beam 224, which is beneficial to improving the overall structural strength of the support frame 2; moreover, the support beam 221, the two first connecting main beams 223, the two second connecting main beams 224 and the two vertical beams 211 can form a square structure which can be arranged along the second direction in the length direction, so that the target 1 can be conveniently mounted in the second direction.

In one embodiment, the vertical beams 211, the horizontal beams 212, the supporting beams 221, the connecting beams 222, etc. can be assembled by standard sectional materials through screws, bolts, etc. to facilitate the disassembly and assembly.

In an embodiment, referring to fig. 2, as a specific implementation of the stand assembly structure provided in the embodiment of the present application, the supporting frame 2 further includes a handle 23 installed on the first supporting frame body 21. Specifically, the handle 23 may be mounted on the cross beam 212 remote from the support beam 221, and the handle 23 may be mounted and fixed to the cross beam 212 by a locking member such as a screw, so that the detachable mounting of the handle 23 can be achieved. On one hand, the structure is convenient for taking and placing the support frame 2; on the other hand, when the stand assembly is mounted on the alignment device for a vehicle, the handle 23 can be used as a pull handle, which facilitates the pushing and pulling of the alignment device for a vehicle.

In an embodiment, referring to fig. 3 to fig. 5, as a specific implementation manner of the stand assembly structure provided in the embodiment of the present application, each hanging buckle 12 includes a mounting plate 121 mounted on the base plate 11, a blocking plate 122 disposed opposite to the mounting plate 121, and a connecting guide post 123 connecting the mounting plate 121 and the blocking plate 122; each hanger 3 comprises a first base 31 mounted on the supporting frame 2 and a second base 32 mounted on the first base 31, a groove 321 for the corresponding connecting guide post 123 to extend into is formed on the second base 32, and a step 33 for matching and abutting against the corresponding abutting sheet 122 is formed between the second base 32 and the first base 31. With the structure, the supporting and positioning of the supporting frame 2 to the substrate 11 can be realized by extending each connecting guide post 123 into the corresponding groove 321; through the resisting cooperation between each resisting piece 122 and the corresponding step portion 33, each hanging buckle 12 can be hung on the hanging rack 3.

In an embodiment, please refer to fig. 2 and 5, as a specific implementation of the stand assembly structure provided in the embodiment of the present application, a side of each first base 31 facing away from the supporting frame 2 is coplanar with a side of the corresponding second base 32 facing away from the supporting frame 2. This structure can guarantee that each stores pylon 3 keeps the level towards the side of corresponding installation piece 121 to make each stores pylon 3 and corresponding installation piece 121 laminating inseparable, help improving the position accuracy of mark target 1 mount on support frame 2.

In an embodiment, please refer to fig. 5, as a specific implementation of the stand assembly structure provided in the embodiment of the present application, a thickness of each first base 31 is greater than a thickness of the corresponding second base 32. With this structure, the thickness difference between each first base 31 and the corresponding second base 32 can form a space for the corresponding blocking piece 122 to extend into, so that each blocking piece 122 cooperates with the corresponding step portion 33 for blocking.

In one embodiment, each first base 31 is integrally formed with a respective second base 32. This structure through with 3 integrated into one piece designs of stores pylon, helps improving the whole mechanical properties of stores pylon 3, the processing preparation of being convenient for, and is efficient.

In one embodiment, referring to fig. 1 and 5, each first base 31 has a mounting hole 310, and the supporting frame 2 is correspondingly mounted with a fastener 24 that is engaged with the corresponding mounting hole 310. Wherein each mounting hole 310 may be a screw hole and each fastener 24 may be a screw. This structure can realize each stores pylon 3 and support frame 2 to be connected dismantled, is convenient for also adjust the mounted position of stores pylon 3 on support frame 2.

In an embodiment, referring to fig. 4, as a specific implementation of the stand assembly structure provided in the embodiment of the present application, each blocking piece 122 and the corresponding connecting guide post 123 are integrally formed. This structure helps improving the whole mechanical strength of hanging the knot 12, and the processing preparation of being convenient for is efficient.

In one embodiment, referring to fig. 4, each mounting plate 121 may have a circular structure, and each mounting plate 121 may be connected to the substrate 11 by screws, may be adhered by glue, and may be integrally formed with the substrate 11. Each blocking piece 122 can also be in a circular structure, and each connecting guide post 123 is arranged between the corresponding blocking piece 122 and the corresponding mounting piece 121; the central axis of each abutting sheet 122 and the central axis of the corresponding mounting sheet 121 of the corresponding connecting guide column 123 are collinear. Each blocking piece 122, the corresponding connecting guide post 123 and the corresponding mounting piece 121 can be integrally formed, so that the overall mechanical strength of the hanging buckle 12 is improved, the hanging buckle is convenient to process and manufacture, and the efficiency is high.

The embodiment of the application also provides a vehicle calibration device which comprises the stand assembly structure provided by any one of the embodiments. This structure adopts the automobile-used calibrating device of above-mentioned grudging post package assembly, can be according to the size of a dimension of mark target 1, hangs mark target 1 of different sizes on support frame 2 along first direction or second direction to make support frame 2 compatible not mark target 1 of different sizes, adaptability is good.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. Grudging post package assembly for carry the mark target, the mark target include the base plate with install in a plurality of on the base plate are hung and are detained, its characterized in that, grudging post package assembly includes:

a support frame;

the hanging racks are divided into two groups, one group of hanging racks is arranged on the support frame along a first direction, and the other group of hanging racks is used for being matched with the hanging buckles for hanging so that the target is hung on the support frame along the first direction; the other group of hangers are arranged on the support frame along a second direction, and the other group of hangers are used for being matched with the plurality of hanging buckles for hanging, so that the target is hung on the support frame along the second direction.

2. The stand assembly structure according to claim 1, wherein: the supporting frame comprises a first supporting frame body and a second supporting frame body connected with the first supporting frame body, the length direction of the first supporting frame body is arranged along the first direction, and a group of hanging frames are mounted on the first supporting frame body; the length direction of the second support frame body is arranged along the second direction, and the second support frame body is provided with another group of hangers.

3. The stand assembly structure according to claim 2, wherein: the first support frame body comprises two vertical beams which are oppositely arranged and a plurality of cross beams which are connected with the two vertical beams, and a group of hangers are respectively arranged on the plurality of cross beams; the second support frame body is including installing in a supporting beam on the first support frame body, two are stretched out respectively at the both ends of a supporting beam erect the roof beam, the second support frame body still including with the both ends of a supporting beam respectively with two erect two tie-beams that the roof beam is connected, another group the stores pylon install respectively in a supporting beam and two on the tie-beam.

4. The stand assembly structure according to claim 3, wherein: each connecting beam comprises a first connecting main beam and a second connecting main beam, one end of the first connecting main beam is connected with the supporting beam, the other end of the first connecting main beam is connected with one end of the second connecting main beam, and the other end of the second connecting main beam is connected with the corresponding vertical beam; and the second connecting main beams are provided with the hanging racks.

5. The stand assembly structure according to claim 2, wherein: the support frame further comprises a handle arranged on the first support frame body.

6. The stand assembly structure according to any one of claims 1 to 5, wherein: each hanging buckle comprises a mounting piece mounted on the substrate, a blocking piece arranged opposite to the mounting piece and a connecting guide pillar for connecting the mounting piece and the blocking piece; each hanger comprises a first base installed on the support frame and a second base installed on the first base, a groove used for allowing the corresponding connecting guide pillar to extend into is formed in the second base, and a step portion used for being matched and abutted with the corresponding abutting piece is formed between the second base and the first base.

7. The stand assembly structure according to claim 6, wherein: the side face of each first base departing from the supporting frame is coplanar with the side face of the corresponding second base departing from the supporting frame.

8. The stand assembly structure according to claim 6, wherein: the thickness of each first base is larger than that of the corresponding second base.

9. The stand assembly structure according to claim 6, wherein: each abutting sheet and the corresponding connecting guide post are integrally formed.

10. Automobile-used calibrating device, its characterized in that: comprising a stand assembly according to any of claims 1-9.

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