EMC shielding camera obscura

Abstract

The utility model provides an EMC shielding camera obscura comprising the following structures: a support, the left and right ends of the support are fixedly provided with auxiliary frames, and the rear ends of the auxiliary frames are movably connected with screw rods; a mounting seat is movably connected to a top moving end of the lifting rod, an antenna assembly is arranged at the top of the mounting seat, a screw rod is rotated through a hand wheel, a first sliding seat is matched with a first positioning seat to change the working positions of a first connecting rod and a second connecting rod, and front-back movement of the front portion of the auxiliary frame under the lifting rod is completed; the lifting rod changes the working height of the antenna assembly, the lifting rod, the mounting seat and the second limiting bolt are matched to change the horizontal deflection angle of the antenna assembly, the mounting seat and the fastening bolt are matched to change the pitching angle of the antenna assembly, and a user can conveniently adjust the working position of the antenna assembly in the box body according to tested equipment to carry out EMC test operation.

Description

Technical Field

[0001] This utility model mainly relates to the field of shielded dark boxes, specifically to an EMC shielded dark box. Background Technology

[0002] In electromagnetic compatibility testing, the device under test (DUT) needs to be placed in a shielded dark box to isolate it from external electromagnetic interference. The shielded dark box is equipped with an antenna device as a signal transmitting and receiving device to receive the electromagnetic signals emitted by the DUT. Before the operation begins, the antenna mounting bracket inside the shielded dark box needs to have a lifting and adjusting capacity of at least 1 meter.

[0003] Existing antenna mounting brackets in shielded enclosures typically use a fixed cast iron base and a telescopic rod. When the antenna position needs to be adjusted according to the device under test (DUT), the working height of the antenna assembly can usually be adjusted via the telescopic rod. Components for adjusting the pitch angle can be installed between the telescopic rod and the antenna assembly. However, when it is necessary to adjust the distance between the antenna assembly and the DUT, the cast iron base design makes it inconvenient to move. If the placement of the DUT is adjusted, the tooling fixture of the DUT is usually fixed on a large wooden table inside the enclosure, which also presents a problem of inconvenience in moving it.

[0004] The inventors proposed an EMC shielded dark box, which incorporates a scissor-arm telescopic structure between the traditional antenna assembly, extension rod, and cast iron base. This structure alters the working position of the antenna assembly within the shielded dark box, allowing users to easily adjust the antenna assembly according to their needs and enabling convenient adjustment of the antenna assembly's working position. Utility Model Content

[0005] 1. The problem that the utility model aims to solve:

[0006] This utility model provides an EMC shielded dark box to solve the technical problem mentioned in the background art of the inconvenience of adjusting the working position of the antenna assembly in the existing shielded dark box.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is: an EMC shielded dark box, comprising the following structure:

[0009] The bracket has auxiliary frames fixed at both ends. A lead screw is movably connected to the rear end of each auxiliary frame. A first positioning seat is fixed to the top of the inner wall of the rear end of each auxiliary frame. A first connecting rod is movably connected to the outer side of the first positioning seat. A first slide is threaded to the bottom of the lead screw. A second connecting rod is movably connected to the outer side of the first slide. The middle part of the second connecting rod is movably connected to the middle part of the first connecting rod.

[0010] The telescopic rod has a mounting base movably connected to its top movable end, and an antenna assembly is provided on the top of the mounting base.

[0011] Furthermore, it also includes a housing, the front of which is hinged to a front door, a platform is fixedly provided at the bottom of the inner wall of the housing, a floor is fixedly provided at the top of the platform, the top of the floor is fixedly connected to the bottom of the support, the top left and right sides of the platform are detachably snapped to the bottom left and right sides of the cover, and an isolation layer is fixedly provided on the inner wall of the cover.

[0012] Furthermore, limiting holes are fixed on both the left and right sides of the bracket, and a machine platform is slidably connected to the middle of the bracket. Limiting pins that match the limiting holes are inserted into both the left and right ends of the machine platform.

[0013] Furthermore, a first limiting bolt is threadedly connected to the top of the rear end of the auxiliary frame, the rear side of which abuts against the outer side of the front part of the lead screw, and a guide rod is fixedly provided at the rear end of the auxiliary frame, the outer side of which is slidably connected to the outer side of the first slide block.

[0014] Furthermore, a handwheel is welded to the top of the lead screw, and the outer side of the lead screw is movably sleeved with the middle of the first positioning seat.

[0015] Furthermore, a second positioning seat is fixedly provided at the top of the extension rod, the outer side of the second positioning seat is movably connected to the top of the second connecting rod, a second slide is movably sleeved at the bottom of the extension rod, the outer side of the second slide is movably connected to the bottom of the first connecting rod, a keyway is provided between the middle part of the second slide and the outer side of the extension rod, and a second limiting bolt is threadedly connected to the top moving end of the extension rod, the screw end of the second limiting bolt abutting against the outer side of the mounting seat.

[0016] Furthermore, the top of the mounting base is threaded with a fastening bolt, and the middle part of the fastening bolt is movably sleeved with the bottom rod of the antenna assembly.

[0017] 3. Beneficial effects:

[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0019] This utility model provides an EMC shielded enclosure. By rotating the lead screw with a handwheel, the working positions of the first slide and the first positioning seat are changed, which allows the front of the auxiliary frame under the extension rod to move back and forth. The extension rod changes the working height of the antenna assembly. The extension rod, the mounting seat, and the second limit bolt work together to change the horizontal deflection angle of the antenna assembly. The mounting seat and the fastening bolt work together to change the pitch angle of the antenna assembly. This allows users to easily adjust the working position of the antenna assembly inside the enclosure to carry out EMC testing according to the equipment under test.

[0020] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0021] Figure 1 This is a perspective view of the novel structure of this utility model;

[0022] Figure 2 This is a half-sectional perspective view of the novel box structure of this utility model;

[0023] Figure 3 This is a half-sectional perspective view of the novel housing structure of this utility model;

[0024] Figure 4 This is a half-sectional perspective view of the novel auxiliary frame structure of this utility model;

[0025] Figure 5 This utility model is a novel Figure 4 Enlarged view of the structure at point A in the middle;

[0026] Figure 6 This is a perspective view of the novel auxiliary frame structure of this utility model;

[0027] Figure 7 This utility model is a novel Figure 6 Enlarged view of the structure at point B.

[0028] Figure label:

[0029] Bracket-1; Limiting hole-11; Machine base-12; Limiting pin-13;

[0030] Auxiliary frame-2; First limit bolt-21; Guide rod-22;

[0031] Lead screw-3; Handwheel-31;

[0032] First positioning seat-4; First connecting rod-41;

[0033] First slide block -5; Second connecting rod -51;

[0034] Extension rod-6; Second positioning seat-61; Second slide-62; Second limit bolt-63;

[0035] Mounting bracket-7; Antenna assembly-71; Fastening bolt-72;

[0036] Box body - 8; Front door - 81; Platform - 82; Floor - 83; Casing - 84; Isolation layer - 85. Detailed Implementation

[0037] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element; the terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0040] Reference Figure 1-7 An EMC shielded dark box includes the following structure:

[0041] The bracket 1 has auxiliary frames 2 fixed at both ends. The rear end of the auxiliary frame 2 is movably connected to a lead screw 3. The top of the inner wall of the rear end of the auxiliary frame 2 is fixed to a first positioning seat 4. The outer side of the first positioning seat 4 is movably connected to a first connecting rod 41. The bottom of the lead screw 3 is threadedly connected to a first slide 5. The outer side of the first slide 5 is movably connected to a second connecting rod 51. The middle part of the second connecting rod 51 is movably connected to the middle part of the first connecting rod 41.

[0042] The extension rod 6 has a mounting base 7 movably connected to its top movable end, and the top of the mounting base 7 is provided with an antenna assembly 71.

[0043] In this embodiment, the box body 8 is also included. A front door 81 is hinged to the front end of the box body 8. A platform 82 is fixedly provided at the bottom of the inner wall of the box body 8. A floor 83 is fixedly provided at the top of the platform 82. The top of the floor 83 is fixedly connected to the bottom of the bracket 1. The top left and right sides of the platform 82 are detachably snapped to the bottom left and right sides of the cover 84, respectively. An isolation layer 85 is fixedly provided on the inner wall of the cover 84.

[0044] The enclosure 8 is equipped with a cover 84 and a platform 82 to form an intermediate layer. The cooperation between the bottom plate and the isolation layer 85 completes the basic structure of the shielded dark box.

[0045] In this embodiment, limiting holes 11 are fixed on both the left and right sides of the bracket 1, and a machine platform 12 is slidably connected to the middle of the bracket 1. Limiting pins 13 that match the limiting holes 11 are inserted into both the left and right ends of the machine platform 12.

[0046] Based on the user's design and usage needs, the fit between the limit pin 13 and the limit hole 11 is adjusted to complete the height adjustment of the machine tool 12 on the bracket 1, making it convenient for the user to place instruments on the machine tool 12.

[0047] In this embodiment, a first limiting bolt 21 is threadedly connected to the top of the rear end of the auxiliary frame 2. The rear side of the first limiting bolt 21 abuts against the outer side of the front part of the lead screw 3. A guide rod 22 is fixedly provided at the rear end of the auxiliary frame 2. The outer side of the guide rod 22 is slidably connected to the outer side of the first slide block 5.

[0048] The first limit bolt 21 completes the process of releasing or locking the rotation restriction of the lead screw 3 on the auxiliary frame 2.

[0049] In this embodiment, a handwheel 31 is welded to the top of the lead screw 3, and the outer side of the lead screw 3 is movably connected to the middle of the first positioning seat 4.

[0050] Handwheel 31 drives lead screw 3 to rotate, completing the up-and-down movement of the first slide block 5 outside the guide rod 22. This, in conjunction with the first positioning seat 4, completes the unfolding of the first connecting rod 41 and the second connecting rod 51. The second slide block 62 slides up and down outside the extension rod 6 along with the first slide block 5, completing the adjustment of the working position of the extension rod 6 at the front of the auxiliary frame 2. This allows the user to adjust the working position of the extension rod 6 on the floor 83 according to testing needs, and the extension rod 6 changes the working height of the antenna assembly 71.

[0051] In this embodiment, a second positioning seat 61 is fixedly provided on the top of the extension rod 6. The outer side of the second positioning seat 61 is movably connected to the top of the second connecting rod 51. A second sliding seat 62 is movably sleeved on the bottom of the extension rod 6. The outer side of the second sliding seat 62 is movably connected to the bottom of the first connecting rod 41. A keyway is provided between the middle part of the second sliding seat 62 and the outer side of the extension rod 6. A second limiting bolt 63 is threadedly connected to the top moving end of the extension rod 6. The screw end of the second limiting bolt 63 abuts against the outer side of the mounting seat 7. A fastening bolt 72 is threadedly connected to the top of the mounting seat 7. The middle part of the fastening bolt 72 is movably sleeved with the bottom rod of the antenna assembly 71.

[0052] The second limiting bolt 63 completes the working deflection angle adjustment of the mounting base 7 on the extension rod 6, and the fastening bolt 72 completes the elevation angle adjustment of the antenna assembly 71 above the mounting base 7.

[0053] In this embodiment:

[0054] By rotating the lead screw 3 with the handwheel 31, the first slide 5 and the first positioning seat 4 cooperate to change the working position of the first connecting rod 41 and the second connecting rod 51, so that the front of the auxiliary frame 2 under the extension rod 6 can move back and forth. The extension rod 6 changes the working height of the antenna assembly 71. The extension rod 6, the mounting seat 7 and the second limit bolt 63 cooperate to change the horizontal deflection angle of the antenna assembly 71. The mounting seat 7 and the fastening bolt 72 cooperate to change the pitch angle of the antenna assembly 71, so that the user can adjust the working position of the antenna assembly 71 in the housing 8 according to the equipment under test to carry out EMC testing.

[0055] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An EMC shielded dark box, characterized in that: Includes the following structure: A bracket (1) is provided with auxiliary frames (2) at both ends of the bracket (1). A lead screw (3) is movably connected to the rear end of the auxiliary frame (2). A first positioning seat (4) is fixed to the top of the inner wall of the rear end of the auxiliary frame (2). A first connecting rod (41) is movably connected to the outer side of the first positioning seat (4). A first slide (5) is threaded to the bottom of the lead screw (3). A second connecting rod (51) is movably connected to the outer side of the first slide (5). The middle part of the second connecting rod (51) is movably connected to the middle part of the first connecting rod (41). The telescopic rod (6) has a mounting base (7) movably connected to its top movable end, and the top of the mounting base (7) is provided with an antenna assembly (71).

2. The EMC shielded dark box according to claim 1, characterized in that: It also includes a box (8), the front end of which is hinged with a front door (81), a platform (82) is fixedly provided at the bottom of the inner wall of the box (8), a floor (83) is fixedly provided at the top of the platform (82), the top of the floor (83) is fixedly connected to the bottom of the bracket (1), the top left and right sides of the platform (82) are detachably snapped to the bottom left and right sides of the cover (84), and an isolation layer (85) is fixedly provided on the inner wall of the cover (84).

3. An EMC shielded dark box according to claim 1, characterized in that: The bracket (1) has a limiting hole (11) fixed on both the left and right sides. The bracket (1) is slidably connected to the middle of the machine platform (12). The machine platform (12) has a limiting pin (13) that matches the limiting hole (11) inserted at both the left and right ends.

4. An EMC shielded dark box according to claim 1, characterized in that: The auxiliary frame (2) has a first limiting bolt (21) threadedly connected to the top of its rear end. The rear side of the first limiting bolt (21) abuts against the outer side of the front part of the lead screw (3). The auxiliary frame (2) has a guide rod (22) fixedly installed at its rear end. The outer side of the guide rod (22) is slidably connected to the outer side of the first slide block (5).

5. An EMC shielded dark box according to claim 1, characterized in that: A handwheel (31) is welded to the top of the lead screw (3), and the outer side of the lead screw (3) is movably connected to the middle of the first positioning seat (4).

6. An EMC shielded dark box according to claim 1, characterized in that: The top of the extension rod (6) is fixed with a second positioning seat (61), the outer side of the second positioning seat (61) is movably connected to the top of the second connecting rod (51), the bottom of the extension rod (6) is movably sleeved with a second slide (62), the outer side of the second slide (62) is movably connected to the bottom of the first connecting rod (41), the middle part of the second slide (62) and the outer side of the extension rod (6) are provided with a keyway, the top moving end of the extension rod (6) is threadedly connected with a second limiting bolt (63), the screw end of the second limiting bolt (63) abuts against the outer side of the mounting seat (7).

7. An EMC shielded dark box according to claim 1, characterized in that: The top of the mounting base (7) is threaded with a fastening bolt (72), and the middle part of the fastening bolt (72) is movably sleeved with the bottom rod of the antenna assembly (71).

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