Display screen supporting frame

Abstract

The utility model relates to a display screen supporting frame which comprises a supporting rod, a cross beam, a mounting beam and a mounting frame, and the supporting rod is constructed to extend in the vertical direction; the cross beam is constructed to extend in the horizontal direction, and the cross beam is connected with the top of the supporting rod; the multiple mounting beams are arranged on the cross beam at intervals and are perpendicular to the cross beam and the supporting rod; the mounting frame is connected to the mounting beam and extends downwards from the mounting beam; the mounting rack is configured to be used for mounting a display screen matrix, each display screen is provided with a magnet, the mounting rack is provided with a groove, and the groove is configured to be used for accommodating the magnets. According to the display screen supporting frame provided by the invention, the magnets on the display screen are matched with the grooves, so that the display screen can be quickly mounted and dismounted, the mounting process is simplified, mounting dislocation can be avoided, the mounting accuracy is ensured, and the display screen can be ensured not to easily move or fall off in the use process.

Description

Technical Field

[0001] The present disclosure relates to the technical field of support frames, and more specifically, to a display screen support frame. Background Art

[0002] As an indispensable display tool in the information age, display screens play an important role in various occasions. However, the installation and use experience of display screens largely depend on the design of the display screen bracket. In the prior art, the connection between the display screen and the bracket mostly adopts traditional physical fixing methods, such as screws, clamps or buckles. However, this fixing method makes the installation and disassembly process more complicated. In addition, this fixing method has high requirements on the accuracy of the fixing points. A slight deviation may cause installation dislocation, affecting the visual effect and comfort of use. Utility Model Content

[0003] In view of this, an embodiment of the present disclosure provides a display screen support frame to solve the technical defects existing in the prior art.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0005] The present disclosure provides a display screen support frame, comprising:

[0006] A support rod, wherein the support rod is configured to extend in a vertical direction;

[0007] A crossbeam, wherein the crossbeam is configured to extend in a horizontal direction and is connected to a top of the support rod;

[0008] A mounting beam, wherein a plurality of the mounting beams are provided, and the plurality of mounting beams are configured to be arranged on the cross beam at intervals and are perpendicular to the cross beam and the support rod;

[0009] The mounting frame is configured to be connected to the mounting beam and to extend downward from the mounting beam; the mounting frame is configured to be used for mounting a display screen matrix, and each display screen is provided with a magnet, and the mounting frame is provided with a groove, and the groove is configured to accommodate the magnet.

[0010] In one embodiment of the present disclosure, two crossbeams are provided, and the two crossbeams are configured to be arranged in parallel; and both ends of the mounting beam are configured to be fixed on corresponding crossbeams respectively.

[0011] In one embodiment of the present disclosure, the crossbeam is provided with a plurality of slots, which are evenly distributed on the crossbeam; the mounting beam is provided with a buckle, which is constructed to cooperate with the slots and is used to fix the mounting beam on the crossbeam at a preset distance; or, the mounting beam is provided with a plurality of slots, which are evenly distributed on the mounting beam at a preset distance; the crossbeam is provided with a buckle, which is constructed to cooperate with the slots and is used to fix the mounting beam on the crossbeam at a preset distance.

[0012] In one embodiment of the present disclosure, a step groove is provided on one side opposite to the two beams, and both ends of the mounting beam are constructed to be supported on the step groove; the clamping groove is located on the top end surface of the beam or the mounting beam.

[0013] In one embodiment of the present disclosure, a plurality of mounting frames are provided, each mounting frame is configured to be connected to the bottom of a corresponding crossbeam and to extend downward from the crossbeam in the height direction; each display screen is configured to be mounted on two adjacent mounting frames.

[0014] In one embodiment of the present disclosure, each of the mounting frames is provided with grooves evenly distributed along its height direction, and the magnets on the display screen are configured to be installed in corresponding grooves according to the size of the display screen.

[0015] In one embodiment of the present disclosure, a fixing rod is disposed at the bottom of the support rod, and the fixing rod is vertically connected to the support rod; a roller is disposed at the bottom of the fixing rod, and the roller is configured to move the display screen support frame.

[0016] In one embodiment of the present disclosure, the support rod is a telescopic structure.

[0017] In one embodiment of the present disclosure, a locking mechanism is provided on the support rod, and the locking mechanism is configured to fix the support rod to be telescoped to different heights.

[0018] In one embodiment of the present disclosure, the mounting frame is constructed to be hinged on the cross beam, and the mounting frame is constructed to be able to deflect forward or backward relative to the cross beam; a locking device is also provided between the mounting frame and the cross beam, and the locking device is constructed to lock the mounting frame on the cross beam.

[0019] The display screen support frame provided by the present invention can realize the rapid installation and removal of the display screen through the cooperation of the magnet and the groove on the display screen, which simplifies the installation process, avoids installation misalignment, ensures the accuracy of installation, and ensures that the display screen will not move or fall off easily during use.

[0020] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram of a display screen support frame provided by an embodiment of the present disclosure;

[0022] Figure 2 yes Figure 1 A partial enlarged view of circle A;

[0023] Figure 3 yes Figure 1 A partial enlarged view of circle B;

[0024] Figure 4 It is a schematic diagram of the structure of a display screen provided in one embodiment of the present disclosure.

[0025] 1-support rod; 2-crossbeam; 3-mounting beam; 4-mounting frame; 5-display screen; 6-magnet; 7-groove; 8-card slot; 9-clip; 10-step groove; 11-fixing rod; 12-roller. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0029] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] The specific embodiments of the present disclosure are described below in conjunction with the accompanying drawings.

[0031] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0032] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0033] In this document, “equal”, “same”, etc. are not strictly limited in mathematical and / or geometric senses, but also include errors that can be understood by those skilled in the art and allowed by manufacturing or use.

[0034] The present invention provides a display screen support frame, comprising a support rod, a cross beam, a mounting beam and a mounting frame, wherein the support rod is configured to extend in a vertical direction; the cross beam is configured to extend in a horizontal direction, and the cross beam is connected to the top of the support rod; a plurality of mounting beams are provided, and the plurality of mounting beams are configured to be arranged on the cross beam at intervals, and are perpendicular to the cross beam and the support rod; the mounting frame is configured to be connected to the mounting beam, and is configured to extend downward from the mounting beam; the mounting frame is configured to be used for installing a display screen matrix, and each display screen is provided with a magnet, and the mounting frame is provided with a groove, and the groove is configured to accommodate the magnet.

[0035] The display screen support frame provided by the present invention can realize the rapid installation and removal of the display screen through the cooperation of the magnet and the groove on the display screen, which simplifies the installation process, avoids installation misalignment, ensures the accuracy of installation, and ensures that the display screen will not move or fall off easily during use.

[0036] For ease of understanding, refer to Figures 1 to 4 , the specific structure and working principle of the display screen support frame disclosed in the present invention are explained in detail in combination with an embodiment.

[0037] like Figure 1 , Figure 2 and Figure 4As shown, the display screen support frame provided by the present disclosure includes a support rod 1, a crossbeam 2, a mounting beam 3 and a mounting frame 4. Among them, the support rod 1 extends in the vertical direction, the crossbeam 2 extends in the horizontal direction, and the crossbeam 2 is connected to the top of the support rod 1. A plurality of mounting beams 3 are also connected to the crossbeam 2, and the plurality of mounting beams 3 are arranged on the crossbeam 2 at intervals, and the plurality of mounting beams 3 are perpendicular to the crossbeam 2 and the support rod 1, and the plurality of mounting beams 3 are parallel to each other. The mounting frame 4 is connected to the mounting beam 3 and extends downward from the mounting beam 3. The mounting member is used to install the display screen matrix, and each display screen 5 is provided with a magnet 6, and a groove 7 is provided on the mounting frame 4, and the groove 7 is used to accommodate the magnet 6. In this embodiment, a plurality of magnets 6 can be provided on the display screen 5. In this embodiment, four magnets 6 are preferably provided. The display screen 5 in this embodiment uses a rectangular display screen, and the four magnets 6 are respectively located at four right angles of the display screen 5. In the actual working process, the magnet 6 on the display screen 5 can be directly aligned with the groove 7 for installation. In order to further improve the stability of the installation of the display screen 5, the material at the bottom of the groove 7 can also be set as a magnetic material to further cooperate with the magnet 6. Through the coordinated setting of the groove 7 and the magnet 6, the display screen 5 can be quickly installed and disassembled, the installation process can be simplified, and the installation misalignment can be avoided, the installation accuracy can be ensured, and the display screen 5 can be ensured not to move or fall off easily during use.

[0038] like Figure 1 As shown, in one embodiment of the present disclosure, two crossbeams 2 are provided, and the two crossbeams 2 are configured to be arranged in parallel; and both ends of the mounting beam 3 are configured to be fixed on the corresponding crossbeams 2 respectively.

[0039] Specifically, two parallel beams 2 are arranged on the top of the support rod 1. The two beams 2 are located on the same horizontal plane to form a stable platform for carrying the mounting beams 3. The parallel arrangement of the double beams 2 can not only provide a larger support area and stronger structural stability, but also disperse the load and reduce the pressure of a single support point, thereby enhancing the load-bearing capacity and seismic performance of the entire system. The two ends of the mounting beam 3 are respectively fixed on the corresponding beams 2, which can not only provide additional support points to further enhance the rigidity and stability of the structure, but also serve as the mounting base of the mounting frame 4, which can be flexibly arranged and adjusted according to the number of mounting frames 4, thereby improving the flexibility and practicality of the structure.

[0040] like Figure 3As shown, in one embodiment of the present disclosure, a plurality of slots 8 are provided on the crossbeam 2, and the plurality of slots 8 are evenly distributed on the crossbeam 2; a buckle 9 is provided on the mounting beam 3, and the buckle 9 is constructed to cooperate with the slot 8, so as to fix the mounting beam 3 on the crossbeam 2 at a preset distance; or, a plurality of slots 8 are provided on the mounting beam 3, and the plurality of slots 8 are evenly distributed on the mounting beam 3 at a preset distance; a buckle 9 is provided on the crossbeam 2, and the buckle 9 is constructed to cooperate with the slot 8, so as to fix the mounting beam 3 on the crossbeam 2 at a preset distance.

[0041] Specifically, considering that the sizes of the display screens 5 are not the same, in order to adapt to display screens 5 of more sizes, the display screen support frame in this embodiment is provided with a plurality of slots 8, and the plurality of slots 8 are evenly distributed on the crossbeam 2 or the mounting beam 3, so that the mounting beam 3 can be fixed on the crossbeam 2 according to a preset distance. When the slots 8 are provided on the crossbeam 2, the buckle 9 is provided on the mounting beam 3, and when the slots 8 are provided on the mounting beam 3, the buckle 9 is provided on the crossbeam 2. The slots 8 can be open, which is convenient for the insertion of the buckle 9, or closed, which is made of elastic material, allowing the buckle 9 to be embedded and locked under a certain pressure. The buckle 9 is a shape matching the slot 8. When the buckle 9 is inserted into the slot 8, the friction force or mechanical locking mechanism between the two can prevent the mounting beam 3 from moving on the crossbeam 2. The buckle 9 can be a separate component, or it can be integrated at the end of the mounting beam 3 or the bottom of the crossbeam 2. By cooperating with the card slot 8 and the buckle 9, the mounting beam 3 can be fixed without the assistance of other tools, which greatly shortens the installation time and facilitates subsequent disassembly and repositioning. In addition, the preset distance of the card slot 8 ensures the position consistency of the mounting beam 3 each time it is fixed, and the number and spacing of the mounting beams 3 can be adjusted according to the size of the display screen 5, thereby improving the versatility of the display screen support frame.

[0042] like Figure 1 As shown, in one embodiment of the present disclosure, a step groove 10 is provided on the opposite side of the two beams 2, and both ends of the mounting beam 3 are constructed to be supported on the step groove 10; the slot 8 is located on the top end surface of the beam 2 or the mounting beam 3.

[0043] Specifically, a step groove 10 is provided on the opposite side of the two beams 2. The step groove 10 is a groove 7 with a certain depth and width, and is similar in shape to a step, which can provide a plane for positioning and bearing for the mounting beam 3. The step groove 10 can enable the mounting beam 3 to obtain a stable support point on the beam 2. The two ends of the mounting beam 3 are placed in the step groove 10, and the stability of the mounting beam 3 on the beam 2 is increased through the friction of the contact surface and the geometric restriction of the step groove 10. Through the provision of the step groove 10, not only can the mounting beam 3 be adjusted on the beam 2 along the length direction of the step groove 10, but also the stability of the mounting beam 3 in the vertical direction can be ensured, thereby adapting to different installation requirements.

[0044] like Figure 1 As shown, in one embodiment of the present disclosure, the mounting frame 4 is constructed to be hinged on the cross beam 2, and the mounting frame 4 is constructed to be able to deflect forward or backward relative to the cross beam 2; a locking device is also provided between the mounting frame 4 and the cross beam 2, and the locking device is constructed to lock the mounting frame 4 on the cross beam 2.

[0045] Specifically, the mounting frame 4 is hinged on the crossbeam 2 so that the mounting frame 4 can deflect forward and backward relative to the crossbeam 2, so that the mounting frame 4 can adjust its angle according to actual needs to adapt to different viewing needs and space restrictions. A locking device is also provided between the mounting frame 4 and the crossbeam 2, which can fix the mounting frame 4 at a specific angle to prevent the angle of the mounting frame 4 from changing under the action of external forces, thereby ensuring the stability and safety of the display screen 5 during use.

[0046] like Figure 1 As shown, in one embodiment of the present disclosure, a plurality of mounting frames 4 are provided, each mounting frame 4 is constructed to be connected to the bottom of a corresponding beam 2, and is constructed to extend downward from the beam 2 in the height direction; each display screen 5 is constructed to be mounted on two adjacent mounting frames 4.

[0047] Specifically, the number of mounting frames 4 is determined according to the number and layout of display screens 5 to be supported. Each mounting frame 4 is independently connected to the bottom of the crossbeam 2, and the mounting frames 4 can be flexibly arranged along the length direction of the crossbeam 2 to meet different display screen 5 arrangement requirements. The mounting frames 4 extend downward from the crossbeam 2 in the height direction to facilitate adjustment of the height of the display screen 5 relative to the ground to achieve the best viewing angle or meet ergonomic requirements. At the same time, support is also provided for the display screen 5 to ensure the stability of the display screen 5 during use. Each display screen 5 is installed on two adjacent mounting frames 4 to ensure the stability of the display screen 5 in the lateral direction and avoid the instability that may be caused by a single support point.

[0048] like Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment of the present disclosure, each mounting frame 4 is provided with grooves 7 evenly distributed along its height direction, and the magnets 6 on the display screen 5 are constructed to be installed in corresponding grooves 7 according to the size of the display screen 5 .

[0049] Specifically, since the grooves 7 are evenly distributed along the height direction of each mounting frame 4, no matter how large or small the size of the display screen 5 is, a groove 7 of a corresponding height can be found for installation, further improving the versatility of the mounting frame 4. The magnet 6 can be installed in the corresponding groove 7 according to the size and installation requirements of the display screen 5. Therefore, the height of the display screen 5 can be adjusted as needed to optimize the display experience or meet specific space layout requirements. The cooperation between the magnet 6 and the groove 7 allows the display screen 5 to be quickly installed and removed from the mounting frame 4 without the use of any tools, thereby improving installation efficiency and convenience. By selecting grooves 7 of different heights, the user can accurately adjust the installation height of the display screen 5 to ensure the best visual effect and ergonomic angle. The close cooperation between the magnet 6 and the groove 7 provides a stable support, and the display screen 5 can remain stable even in the case of slight vibration or collision, and will not move or fall off easily. In addition, the screws and other fasteners required for the traditional fixing method are reduced, making the appearance after installation more concise and beautiful.

[0050] like Figure 1 As shown, in one embodiment of the present disclosure, a fixing rod 11 is provided at the bottom of the support rod 1, and the fixing rod 11 is vertically connected to the support rod 1; a roller 12 is provided at the bottom of the fixing rod 11, and the roller 12 is configured to move the display screen support frame.

[0051] Specifically, the support rod 1 is the main vertical support structure responsible for bearing the weight of the display screen 5. The fixed rod 11 is vertically connected to the support rod 1 and is located at the bottom of the support rod 1 to increase the stability of the overall structure. The fixed rod 11 vertically connected to the support rod 1 enhances the anti-overturning ability of the entire support frame, especially when the display screen 5 is in a tilted or towering state, the fixed rod 11 can provide additional support to prevent the support frame from falling due to unstable center of gravity. A roller 12 is provided at the bottom of the fixed rod 11, and the roller 12 can make the display screen support frame easily move on a plane without laborious lifting, which is particularly suitable for occasions where frequent position changes are required. In addition, the roller 12 is also provided with a locking component, which can quickly adjust the position of the support frame and fix it at a certain point when necessary to ensure the stability of the display screen 5 during use. For a display screen 5 connected with a cable, the mobile support frame can more easily approach a power socket or a data interface, reducing the dependence on long cables and improving the flexibility of the layout. In situations where a quick change of working environment is required, such as lectures, teaching or demonstrations, the movable display support frame can respond quickly, helping users save time and improve efficiency. The movable support frame makes cleaning easier, and the display 5 and its support frame can be easily moved to an easily accessible position for cleaning or maintenance.

[0052] In one embodiment of the present disclosure, the support rod 1 is a telescopic structure.

[0053] Specifically, in this embodiment, the support rod 1 can be a retractable structure composed of a multi-section tubular structure, which is convenient for adjusting the overall height according to actual needs. In order to ensure strength and stability, the material of the support rod 1 is selected from aluminum alloy, stainless steel or high-strength plastic, which is not only light but also has good load-bearing capacity and durability. In addition, a hook can be set on the support rod 1 to hang other equipment and accessories, such as microphones and lighting equipment that can be used in display screen application scenarios, thereby enhancing the versatility of the support frame and the diversity of application scenarios.

[0054] In one embodiment of the present disclosure, a locking mechanism is provided on the support rod 1 , and the locking mechanism is configured to fix the support rod 1 to be telescoped to different heights.

[0055] Specifically, the locking mechanism may include a spring button lock, a knob lock or an automatic locking mechanism, etc. In this embodiment, a spring button lock is selected, and the support rod 1 includes a plurality of telescopic sections. A button is provided on the side of each telescopic section. When the support rod 1 is extended or retracted, the button will enter the positioning hole of the next section, thereby fixing the telescopic position. Release the button to adjust the height. The locking mechanism ensures the stability of the support rod 1 when it is extended or retracted to different heights, avoids accidental contraction due to external vibration or gravity, and protects the safety of the display screen 5. During use, especially when the support rod 1 carries heavy objects, the locking mechanism can prevent the equipment from falling due to failure to be fixed in place, thereby ensuring personnel safety.

[0056] The display screen support frame provided by the present invention can realize the rapid installation and removal of the display screen through the cooperation of the magnet and the groove on the display screen, which simplifies the installation process, avoids installation misalignment, ensures the accuracy of installation, and ensures that the display screen will not move or fall off easily during use.

[0057] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present disclosure is not limited by the described action sequence, because according to the present disclosure, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present disclosure.

[0058] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0059] The preferred embodiments of the present disclosure disclosed above are only used to help explain the present disclosure. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the present disclosure. The present disclosure selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present disclosure, so that those skilled in the art can well understand and use the present disclosure. The present disclosure is limited only by the claims and their full scope and equivalents.

Claims

1. A display screen support frame, characterized in that: include: A support rod (1), wherein the support rod (1) is configured to extend in a vertical direction; A crossbeam (2), the crossbeam (2) being configured to extend in a horizontal direction, and the crossbeam (2) being connected to the top of the support rod (1); A mounting beam (3), wherein a plurality of the mounting beams (3) are provided, and the plurality of mounting beams (3) are configured to be arranged at intervals on the cross beam (2), and to be perpendicular to the cross beam (2) and the support rod (1); A mounting frame (4), the mounting frame (4) being configured to be connected to the mounting beam (3) and being configured to extend downward from the mounting beam (3); the mounting frame (4) being configured to be used for mounting a display screen matrix, and each display screen (5) being provided with a magnet (6); the mounting frame (4) being provided with a groove (7), and the groove (7) being configured to accommodate the magnet (6).

2. The display screen support frame according to claim 1, characterized in that: Two crossbeams (2) are provided, and the two crossbeams (2) are configured to be arranged in parallel; and both ends of the mounting beam (3) are configured to be respectively fixed on corresponding crossbeams (2).

3. The display screen support frame according to claim 2, characterized in that: The crossbeam (2) is provided with a plurality of slots (8), and the plurality of slots (8) are evenly distributed on the crossbeam (2); the mounting beam (3) is provided with a buckle (9), and the buckle (9) is configured to cooperate with the slots (8) and is used to fix the mounting beam (3) on the crossbeam (2) at a preset distance; Alternatively, the mounting beam (3) is provided with a plurality of slots (8), and the plurality of slots (8) are evenly distributed on the mounting beam (3) at a preset distance; and the cross beam (2) is provided with a buckle (9), and the buckle (9) is configured to cooperate with the slots (8) and is used to fix the mounting beam (3) on the cross beam (2) at a preset distance.

4. The display screen support frame according to claim 3, characterized in that: A step groove (10) is provided on one side opposite to the two cross beams (2), and both ends of the mounting beam (3) are constructed to be supported on the step groove (10); the clamping groove (8) is located on the top end surface of the cross beam (2) or the mounting beam (3).

5. The display screen support frame according to claim 1, characterized in that: A plurality of mounting frames (4) are provided, each mounting frame (4) being configured to be connected to the bottom of a corresponding crossbeam (2) and to extend downward from the crossbeam (2) in a height direction; and each display screen (5) being configured to be mounted on two adjacent mounting frames (4).

6. The display screen support frame according to claim 5, characterized in that: Each of the mounting frames (4) is provided with grooves (7) evenly distributed along its height direction, and the magnets (6) on the display screen (5) are constructed to be installed in corresponding grooves (7) according to the size of the display screen (5).

7. The display screen support frame according to claim 1, characterized in that: A fixing rod (11) is arranged at the bottom of the support rod (1), and the fixing rod (11) is vertically connected to the support rod (1); a roller (12) is arranged at the bottom of the fixing rod (11), and the roller (12) is configured to be used for moving the display screen support frame.

8. The display screen support frame according to claim 1, characterized in that: The support rod (1) is a telescopic structure.

9. The display screen support frame according to claim 8, characterized in that: The support rod (1) is provided with a locking mechanism, and the locking mechanism is configured to fix the support rod (1) so that it can be extended to different heights.

10. The display screen support frame according to claim 1, characterized in that: The mounting frame (4) is constructed to be hinged on the cross beam (2), and the mounting frame (4) is constructed to be able to deflect forward or backward relative to the cross beam (2); a locking device is also provided between the mounting frame (4) and the cross beam (2), and the locking device is constructed to lock the mounting frame (4) on the cross beam (2).

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