Fixing device for electromagnetic compatibility test of floor type large-screen equipment

Abstract

The utility model discloses a fixing device for an electromagnetic compatibility test of floor type large-screen equipment, and relates to the technical field of large-screen equipment tests. The device comprises a bottom plate, the top of the bottom plate is fixedly connected with a fixing plate, one side of the top of the bottom plate is fixedly connected with a bearing plate, and the top of the bearing plate is fixedly connected with a fixing block. Through the arrangement of the fixing plate, the bearing plate, the fixing blocks and the universal wheels, the problems that a fixing device in an existing laboratory can only be used for transportation and does not meet the requirement for floor type equipment in the standard (EUT should be insulated from a horizontal grounding reference flat plate, and an insulation support with the maximum thickness of 150 mm is used) are solved; at present, tools are all made of aluminum materials or iron materials, dielectric constants of the tools can influence the accuracy of testing and judgment of results, in authentication and review, auditing experts also put forward corresponding questions, and the problem that large-screen equipment larger than 70 inches is inconvenient to fix is solved through arrangement of the adjusting assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of large-screen equipment testing, and in particular relates to a fixing device for electromagnetic compatibility testing of floor-standing large-screen equipment. Background Art

[0002] Electromagnetic compatibility test for floor-standing large-screen equipment: It is a test conducted on electronic equipment such as large display screens, which aims to evaluate the performance and stability of the equipment in an electromagnetic environment. This test usually includes an evaluation of the equipment's anti-interference ability under electromagnetic field interference, as well as the level of electromagnetic radiation that the equipment itself may generate.

[0003] The main purpose of electromagnetic compatibility testing is to ensure that the device will not be affected by external electromagnetic interference when in use, and will not cause unnecessary electromagnetic interference to its surrounding environment. This is especially important for devices used in commercial environments such as large display screens, because they may work in complex electromagnetic environments such as shopping malls, office buildings or other public places. By conducting electromagnetic compatibility testing, manufacturers can ensure that their products comply with relevant electromagnetic compatibility standards and regulations, improve product reliability and stability, and reduce potential problems caused by electromagnetic interference.

[0004] During the electromagnetic compatibility test, according to GB / T9254.1-2021 and EN55032-2015 standards, for the EUT's expected operating layout is wall-mounted, the measurement layout is desktop during specific measurements. Then, there are large and heavy samples in the actual test samples, which are extremely inconvenient to carry. As a desktop device, personnel need to assist in the darkroom, which brings risks to the accuracy of the measurement results and the safety of personnel. At the same time, the current fixed tooling is made of aluminum or iron materials, and its dielectric constant will affect the accuracy of the test and the judgment of the results. For this reason, we provide a fixture for electromagnetic compatibility test of floor-standing large-screen equipment to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an electromagnetic compatibility test fixture for floor-standing large-screen equipment, which solves the problem that the electromagnetic compatibility test fixture for floor-standing large-screen equipment in the prior art cannot meet the use requirements by adjusting the setting of the components.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment, comprising a bottom plate, a fixing plate fixedly connected to the top of the bottom plate, a bearing plate fixedly connected to one side of the top of the bottom plate, a fixing block fixedly connected to the top of the bearing plate, and universal wheels installed on both sides of the bottom of the bottom plate;

[0008] The front end and the rear end of one side of the supporting plate are both provided with adjustment components, and the adjustment components include an adjustment box, a screw is threadedly connected to one side of the inner cavity of the adjustment box, one end of the screw extends to the inside of the adjustment box and a movable plate is installed through a bearing seat, the front end and the rear end of the top of the movable plate are fixedly connected with connecting blocks, and the top of the connecting block extends to the outside of the adjustment box and is fixedly connected to a limiting block.

[0009] The utility model is further configured as follows: the length of the bottom plate is 80 cm, the width is 8 cm, the height of the fixed plate is 150 cm, and the length is 180 cm; the bottom plate, the fixed plate and the bearing plate are all made of wood; the fixed block is made of EVA foam; and the universal wheel is made of rubber.

[0010] The utility model is further configured that the number of the fixing blocks is five and they are evenly distributed on the top of the bearing plate, and a card slot is provided inside the fixing block.

[0011] The utility model is further configured that the free end of the screw is fixedly connected to a hand wheel, and the surface of the hand wheel is provided with anti-slip grooves.

[0012] The utility model is further configured that guide plates are fixedly connected to both sides of the inner wall of the inner cavity of the regulating box, and both ends of the movable plate are slidably connected to the guide plates.

[0013] The utility model is further configured that the front end and the rear end of one side of the fixing plate are fixedly connected to a reinforcing rod, one side of the reinforcing rod is fixedly connected to a reinforcing rib, and the free end of the reinforcing rib is fixed to one side of the fixing plate.

[0014] The utility model is further configured that the front end and the rear end of the top of the regulating box are both provided with sliding grooves, and the connecting block is slidably connected with the sliding grooves.

[0015] The beneficial effects of the utility model are as follows: through the arrangement of a fixing plate, a load-bearing plate, a fixing block and a universal wheel, the problem that the current fixing devices in the laboratory can only be used for transportation, which does not meet the requirements of the standard for floor-standing equipment (the EUT should be insulated from the horizontal ground reference plate and use an insulating support with a maximum thickness of 150 mm), and the current tooling is made of aluminum or iron materials, and its dielectric constant will affect the accuracy of the test and the judgment of the results. During the certification review, the audit experts also raised corresponding questions, and the setting of the adjustment component was used to solve the problem of inconvenient fixing of large-screen equipment above 70 inches.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 The figure is a structural stereogram of a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment.

[0019] Figure 2 It is a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment. Figure 1 A is an enlarged schematic diagram.

[0020] Figure 3 The figure is a schematic diagram of the internal structure of an adjustment box used in an electromagnetic compatibility test fixture for floor-standing large-screen equipment.

[0021] Figure 4 The figure is a schematic diagram of a fixing block used in an electromagnetic compatibility test fixture for floor-standing large-screen equipment.

[0022] Figure 5 The figure is a front view schematic diagram of a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment.

[0023] In the attached drawings: 1. bottom plate; 2. fixed plate; 3. bearing plate; 4. fixed block; 5. universal wheel; 6. adjustment assembly; 601. adjustment box; 602. screw rod; 603. movable plate; 604. connecting block; 605. limit block; 606. hand wheel; 7. guide plate; 8. reinforcing rod; 9. reinforcing rib. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0026] See also Figure 1-5The utility model is a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment, including a bottom plate 1, a fixing plate 2 fixedly connected to the top of the bottom plate 1, a bearing plate 3 fixedly connected to one side of the top of the bottom plate 1, a fixing block 4 fixedly connected to the top of the bearing plate 3, and universal wheels 5 are installed on both sides of the bottom of the bottom plate 1; an adjustment component 6 is arranged at the front and rear ends of one side of the bearing plate 3, and the adjustment component 6 includes an adjustment box 601, a screw 602 is threadedly connected to one side of the inner cavity of the adjustment box 601, one end of the screw 602 extends to the inside of the adjustment box 601 and a moving plate 603 is installed through a bearing seat, and a connecting block 604 is fixedly connected to the front and rear ends of the top of the moving plate 603, and the top of the connecting block 604 extends to the outside of the adjustment box 601 and is fixedly connected to a limiting block 605.

[0027] Specifically: No metal material is used in any structure of the utility model to ensure the accuracy of the test data, because metal materials may cause electromagnetic resonance effect between the floor-standing large screen and the test equipment, increasing the possibility of electromagnetic interference. In addition, the metal structure may also produce reflection, scattering and other phenomena at certain frequencies, thereby interfering with the test results. Metal materials usually have good conductivity, so they may affect the grounding of the floor-standing large screen and the conduction path of electromagnetic waves. If the metal structure is not properly grounded or forms a poor conduction path, it may cause the electromagnetic interference to be unable to be effectively dispersed and discharged. In addition, it affects the accuracy and reliability of the test, so metal materials cannot be used. There are two bottom plates 1, and they are symmetrically distributed at the bottom of the fixed plate 2. There is one fixed plate 2 and one load-bearing plate 3. The universal wheel 5 is a brakeable universal wheel 5, which can ensure stability when stopped. The universal wheel 5 is made of rubber, and the accessories are made of metal. The surface of the screw 602 is connected to the internal thread of the adjustment box 601, which can drive the movable plate 603 to move when it rotates. Through the setting of the connecting block 604, the movable plate 603 can be connected to the limit block 605, which is convenient for the limit block 605 to move. Specific embodiment 2

[0029] See also Figure 1-5 On the basis of the specific embodiment 1, the bottom plate 1 is 80 cm long and 8 cm wide, the fixed plate 2 is 150 cm high and 180 cm long, the bottom plate 1, the fixed plate 2 and the bearing plate 3 are all made of wood, the fixed block 4 is made of EVA foam, the universal wheel 5 is made of rubber, there are five fixed blocks 4, which are evenly distributed on the top of the bearing plate 3, a card slot is opened inside the fixed block 4, and the free end of the screw 602 is fixedly connected to a hand wheel 606, and the surface of the hand wheel 606 is provided with anti-slip grooves.

[0030] Specifically: there are three card slots, which can accommodate floor-standing large-screen devices of different sizes, and are also convenient for adjusting the test angle. Through the setting of the hand wheel 606, the screw 602 can be easily rotated to drive the moving plate 603 to move. Specific embodiment three

[0032] See also Figure 1-5 On the basis of the first and second specific embodiments, guide plates 7 are fixedly connected to both sides of the inner wall of the inner cavity of the regulating box 601, both ends of the movable plate 603 are slidably connected to the guide plates 7, the front and rear ends of one side of the fixed plate 2 are fixedly connected to the reinforcing rod 8, one side of the reinforcing rod 8 is fixedly connected to the reinforcing rib 9, the free end of the reinforcing rib 9 is fixed to one side of the fixed plate 2, and the front and rear ends of the top of the regulating box 601 are provided with sliding grooves, and the connecting block 604 is slidably connected to the sliding grooves.

[0033] Specifically: through the setting of the guide plate 7, the movable plate 603 can be limited so that the movable plate 603 can move smoothly in the horizontal direction. Through the setting of the reinforcing rod 8 and the reinforcing rib 9, the stability of the fixed plate 2 during use can be improved. Through the setting of the slide groove, the connecting block 604 can be conveniently moved in the horizontal direction.

[0034] The working principle of the utility model is: turn the hand wheel 606, the hand wheel 606 drives the screw 602 to rotate, the screw 602 drives the movable plate 603 to move on the surface of the guide plate 7, the movable plate 603 drives the connecting block 604 to move, the connecting block 604 drives the limit block 605 to move, and adjusts the distance between the fixed plate 2 to facilitate the placement of larger-sized floor-standing large-screen devices. Combined with the setting of the fixed block 4, the problem of inconvenient fixing of floor-standing large-screen devices of different sizes can be solved.

[0035] The standard parts used in the present invention can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a control unit. The control circuit of the control unit can be realized by simple programming by technicians in this field, which belongs to the common knowledge in this field. Therefore, the control method and circuit connection are no longer explained in detail in the present invention.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fixture for electromagnetic compatibility testing of floor-standing large-screen equipment, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a fixing plate (2), one side of the top of the bottom plate (1) is fixedly connected to a bearing plate (3), the top of the bearing plate (3) is fixedly connected to a fixing block (4), and universal wheels (5) are installed on both sides of the bottom of the bottom plate (1); An adjustment component (6) is provided at the front and rear ends of one side of the bearing plate (3), and the adjustment component (6) comprises an adjustment box (601), a screw rod (602) is threadedly connected to one side of the inner cavity of the adjustment box (601), one end of the screw rod (602) extends into the interior of the adjustment box (601) and is provided with a movable plate (603) via a bearing seat, and a connection block (604) is fixedly connected to the front and rear ends of the top of the movable plate (603), and the top of the connection block (604) extends to the exterior of the adjustment box (601) and is fixedly connected to a limit block (605).

2. According to claim 1, a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment is characterized in that: The bottom plate (1) is 80 cm long and 8 cm wide, the fixed plate (2) is 150 cm high and 180 cm long, the bottom plate (1), the fixed plate (2) and the bearing plate (3) are all made of wood, the fixed block (4) is made of EVA foam, and the universal wheel (5) is made of rubber.

3. According to claim 1, a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment is characterized in that: There are five fixing blocks (4) evenly distributed on the top of the carrying plate (3), and a card slot is provided inside the fixing block (4).

4. According to claim 1, a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment is characterized in that: The free end of the screw rod (602) is fixedly connected to a hand wheel (606), and the surface of the hand wheel (606) is provided with anti-slip grooves.

5. According to claim 1, a fixture for electromagnetic compatibility testing of floor-standing large-screen equipment is characterized in that: Guide plates (7) are fixedly connected to both sides of the inner wall of the inner cavity of the regulating box (601), and both ends of the movable plate (603) are slidably connected to the guide plates (7).

6. The electromagnetic compatibility test fixture for floor-standing large-screen equipment according to claim 1 is characterized in that: A reinforcing rod (8) is fixedly connected to the front and rear ends of one side of the fixing plate (2), a reinforcing rib (9) is fixedly connected to one side of the reinforcing rod (8), and a free end of the reinforcing rib (9) is fixed to one side of the fixing plate (2).

7. The electromagnetic compatibility test fixture for floor-standing large-screen equipment according to claim 1 is characterized in that: The front end and the rear end of the top of the adjustment box (601) are both provided with sliding grooves, and the connecting block (604) is slidably connected to the sliding grooves.

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