Anti-interference shielding cover for return transformer

Abstract

The utility model discloses an anti-interference shielding case for a return transformer, which belongs to the field of anti-interference shielding cases and comprises a return transformer body, an anti-interference mechanism is arranged outside the return transformer body, and the anti-interference mechanism comprises an electromagnetic shielding case, a shielding base, a fixed rod, a compression spring, a movable plate and a limiting rod. The arranged anti-interference mechanism is used in cooperation with an upper return transformer body, and pins at the bottom of the return transformer body penetrate through pin holes in the top face of the shielding base and pin sleeves on the bottom face of the shielding base, so that the shielding base is installed on the top face of the return transformer body in advance; the pins on the return transformer body can be protected through the pin sleeves, so that the problem that the pins on the return transformer body are bent or damaged due to external factors when the return transformer body is used is solved; the purpose that the anti-interference shielding cover can be conveniently disassembled and assembled for use can be achieved, and the return transformer body can be conveniently disassembled and maintained.

Description

Technical Field

[0001] This utility model relates to the field of anti-interference shielding covers, and in particular to an anti-interference shielding cover for a flyback transformer. Background Technology

[0002] A flyback transformer, also known as a horizontal output transformer or a retrace transformer, is a special type of high-voltage pulse power transformer. Its main function is to boost the voltage during the horizontal scanning retrace period (when the horizontal output transistor is off) by using the deflection current to charge and discharge the flyback capacitor, generating a near-1000V peak-to-peak horizontal frequency high-voltage pulse to obtain the 24-25kV anode ultra-high voltage required by the picture tube raster. It is a core component in electrical appliances that use a picture tube as a display device (such as televisions and monitors), responsible for providing the various voltages required by the picture tube, and sometimes also providing pulse signals needed by other circuits.

[0003] In existing technologies, in order to effectively block external electromagnetic waves from entering the interior of the reverse-fly transformer or prevent the leakage of electromagnetic waves generated by the reverse-fly transformer during actual use, an anti-interference shielding cover is required. However, existing anti-interference shielding covers for reverse-fly transformers are usually installed on the frame by stamping or by screws. This makes it difficult to remove the anti-interference shielding cover from the reverse-fly transformer when it malfunctions or is damaged and needs repair. This not only brings inconvenience to the disassembly and use of the anti-interference shielding cover, but also affects the maintenance operation of the reverse-fly transformer. Utility Model Content

[0004] The main purpose of this utility model is to provide an anti-interference shielding cover for a reverse-fault transformer, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An anti-interference shielding cover for a flyback transformer includes a flyback transformer body. An anti-interference mechanism is provided on the outside of the flyback transformer body. The anti-interference mechanism includes an electromagnetic shielding cover, a shielding base, a fixing rod, a compression spring, a movable plate, and a limiting rod. The shielding base is fixedly connected to the bottom surface of the flyback transformer body, and the electromagnetic shielding cover is sleeved on the outside of the flyback transformer body. Fixing rods are fixedly connected to the inner sides of the top surface of the electromagnetic shielding cover, and compression springs are sleeved on the outside of the fixing rods. The movable plate is movably connected to the fixing rods through a connecting block at its bottom end, and the connecting block is also fixedly connected to the compression spring. A limiting rod is fixedly connected to the outer wall of the movable plate and passes through the electromagnetic shielding cover.

[0007] Preferably, the top surface of the shielding base has a plurality of pin holes, and the bottom surface of the shielding base is fixedly equipped with a plurality of pin sleeves corresponding to the pin holes.

[0008] Preferably, a set of symmetrical positioning plates are fixedly installed on the top surface of the shielding base, and through holes are provided on the side walls of the positioning plates.

[0009] Preferably, the top surface of the electromagnetic shielding cover has a lead wire hole, and the bottom surface of the electromagnetic shielding cover has a positioning port corresponding to the positioning plate. The outer wall of the electromagnetic shielding cover, above the positioning port, also has a limit hole.

[0010] Preferably, the top surface of the shielding base is provided with a set of symmetrical horizontal openings, and the inner side walls of the horizontal openings are respectively provided with sliding grooves.

[0011] Preferably, a fixing rod is fixedly installed inside the transverse opening, and a compression spring is fitted on the outside of the fixing rod. The inner end of the compression spring is fixedly installed to one end wall inside the transverse opening. A connecting block is fixedly installed on the bottom surface of the movable plate, and a connecting hole is provided on the side wall of the connecting block. The connecting block is movably installed to the fixing rod through the connecting hole, and the outer end of the compression spring is fixedly installed to the connecting block. Slider blocks are also fixedly installed on both side walls of the connecting block, and the sliders are movably installed in the slide groove. A limit rod is fixedly installed above the outer wall of the movable plate, and the limit rod is inserted into the limit hole. A pressing rod is also fixedly installed on the outer wall of the movable plate below the limit rod, and the pressing rod passes through the through hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this utility model, the anti-interference mechanism is used in conjunction with the use of the reverse transformer body. The pins at the bottom of the reverse transformer body pass through the pin holes on the top surface of the shielding base and the pin sleeves on the bottom surface. This allows the shielding base to be pre-installed on the top surface of the reverse transformer body. The pin sleeves can protect the pins on the reverse transformer body, preventing the pins on the reverse transformer body from being bent or damaged due to external factors during use.

[0014] Manually press the protruding pressing rods on the outer walls of the positioning plates on both sides of the top surface of the shielding base until they can no longer be pressed. Maintain the same pressing force on the rods, then fit the electromagnetic shielding cover onto the outside of the flyback transformer body, inserting the positioning plate into the positioning hole. Release the pressing force on the rods, allowing the compression spring to elastically extend. Push the connecting block so that it moves through the connecting hole along the fixed rod in the transverse opening. The connecting block will drive the movable plate to move synchronously until the limit rod is inserted into the limit hole. In this way, the electromagnetic shielding cover can be installed on the shielding base. The top surface of the shielding base is covered, and the reverse-flight transformer body is encased inside the shielding base. The electromagnetic shielding cover and the shielding base, based on their own high magnetic permeability material characteristics, provide electromagnetic shielding and anti-interference for the reverse-flight transformer body, ensuring the normal use of the reverse-flight transformer body. When disassembling the reverse-flight transformer body later, simply press the pressing rod and remove the electromagnetic shielding cover from the top surface of the shielding base. Compared with the existing technology, this achieves the purpose of facilitating the disassembly and assembly of the anti-interference shielding cover and the disassembly and maintenance of the reverse-flight transformer body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the overall structure of this utility model broken down.

[0017] Figure 3 This is a schematic diagram of the overall structure of the electromagnetic shielding cover of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the shielding base of this utility model;

[0019] Figure 5 For the present utility model Figure 4 A magnified diagram showing the structural breakdown at point A.

[0020] In the diagram: 1. Reverse transformer body; 2. Anti-interference mechanism; 3. Electromagnetic shielding cover; 4. Shielding base; 5. Lead wire hole; 6. Positioning port; 7. Limiting hole; 8. Pin hole; 9. Pin sleeve; 10. Positioning plate; 11. Through hole; 12. Horizontal opening; 13. Slide groove; 14. Fixing rod; 15. Compression spring; 16. Movable plate; 17. Connecting block; 18. Connecting hole; 19. Sliding block; 20. Limiting rod; 21. Pressing rod. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1- Figure 5 As shown, an anti-interference shielding cover for a flyback transformer includes a flyback transformer body 1. An anti-interference mechanism 2 is provided on the outside of the flyback transformer body 1. The anti-interference mechanism 2 includes an electromagnetic shielding cover 3, a shielding base 4, a fixing rod 14, a compression spring 15, a movable plate 16, and a limiting rod 20. The shielding base 4 is fixedly connected to the bottom surface of the flyback transformer body 1, and the electromagnetic shielding cover 3 is sleeved on the outside of the flyback transformer body 1. Fixing rods 14 are fixedly connected to the inner sides of the top surface of the electromagnetic shielding cover 3, and compression springs 15 are sleeved on the outside of the fixing rods 14. The movable plate 16 is movably connected to the fixing rods 14 through a connecting block 17 at the bottom end, and the connecting block 17 is also fixedly connected to the compression spring 15. A limiting rod 20 is fixedly connected to the outer side wall of the movable plate 16 and passes through the electromagnetic shielding cover 3.

[0023] like Figure 4 As shown, the top surface of the shielding base 4 is provided with several pin holes 8. The pin holes 8 on the bottom surface of the shielding base 4 ensure that the pins on the flyback transformer body 1 pass through the shielding base 4, ensuring the normal installation of the flyback transformer body 1. The bottom surface of the shielding base 4 is fixedly installed with several pin sleeves 9 corresponding to the pin holes 8. After the pins on the flyback transformer body 1 pass through the pin sleeves 9, the pin sleeves 9 can protect the pins on the flyback transformer body 1, preventing the pins from bending or breaking due to collision or squeezing of the flyback transformer body 1 during use.

[0024] like Figure 4 As shown, a set of symmetrical positioning plates 10 are fixedly installed on the top surface of the shielding base 4. The positioning plates 10 are used to cooperate with the electromagnetic shielding cover 3 to achieve positioning installation. The side wall of the positioning plate 10 is provided with a through hole 11, which can ensure that the pressing rod 21 can be used for moving and pressing.

[0025] like Figure 3 As shown, the top surface of the electromagnetic shielding cover 3 is provided with a lead wire hole 5. Through the lead wire hole 5, the high voltage lead wire on the reverse transformer body 1 can be led out from inside the electromagnetic shielding cover 3. The bottom surface of the electromagnetic shielding cover 3 is provided with a positioning port 6 corresponding to the positioning plate 10. After the electromagnetic shielding cover 3 is fitted onto the outside of the reverse transformer body 1 and the positioning plate 10 is inserted into the positioning port 6, the electromagnetic shielding cover 3 can be positioned and installed. The outer wall of the electromagnetic shielding cover 3 and above the positioning port 6 is also provided with a limit hole 7. The limit hole 7 is used to cooperate with the limit rod 20 to limit and fix the electromagnetic shielding cover 3.

[0026] like Figure 4 and Figure 5As shown, the top surface of the shielding base 4 is also provided with a set of symmetrical horizontal openings 12. The horizontal openings 12 are used to cooperate with the movable movement of the connecting block 17. The inner two side walls of the horizontal openings 12 are respectively provided with sliding grooves 13. The sliding grooves 13 are used to cooperate with the slider 19 to realize the sliding operation.

[0027] like Figure 4 and Figure 5 As shown, a fixing rod 14 is fixedly installed inside the transverse opening 12, and a compression spring 15 is fitted on the outside of the fixing rod 14. The inner end of the compression spring 15 is fixedly installed to one end wall inside the transverse opening 12. A connecting block 17 is fixedly installed on the bottom surface of the movable plate 16, and a connecting hole 18 is provided on the side wall of the connecting block 17. The connecting block 17 is movably installed to the fixing rod 14 through the connecting hole 18, and the outer end of the compression spring 15 is fixedly installed to the connecting block 17. Slider blocks 19 are also fixedly installed on the two side walls of the connecting block 17, and the sliders 19 are movably installed in the slide groove 13. A limit rod 20 is fixedly installed above the outer wall of the movable plate 16, and the limit rod 20 is inserted into the limit hole 7. The outer wall of the movable plate 16 is located at... A pressing rod 21 is also fixedly installed below the limiting rod 20, and the pressing rod 21 passes through the through hole 11. After pressing the pressing rod 21 and positioning the electromagnetic shielding cover 3 onto the outside of the reverse transformer body 1, the pressing of the pressing rod 21 is released, so that the compression spring 15 performs an elastic recovery and extension operation, and pushes the connecting block 17 so that the connecting block 17 moves outward along the fixing rod 14 through the connecting hole 18 opened on the side wall. The connecting block 17 will drive the movable plate 16 to move synchronously until the limiting rod 20 is inserted into the limiting hole 7, so that the electromagnetic shielding cover 3 can be installed on the outside of the reverse transformer body 1, so as to facilitate the installation of the electromagnetic shielding cover 3, and also facilitate the subsequent disassembly and maintenance of the reverse transformer body 1 by removing the electromagnetic shielding cover 3.

[0028] The specific operating principle of the anti-interference mechanism 2 in conjunction with the reverse-flight transformer body 1 is as follows:

[0029] Before use, the pins of the reverse-flight transformer body 1 are passed through the pin holes 8 on the top surface of the shielding base 4, and the pins of the reverse-flight transformer body 1 are passed through the pin sleeves 9 on the bottom surface of the shielding base 4. The pin sleeves 9 protect the pins of the reverse-flight transformer body 1. Then, the pressing rods 21 protruding from the outer walls of the positioning plates 10 on both sides of the top surface of the shielding base 4 are pressed. The pressing rods 21 push the movable plate 16 through the through holes 11 on the side walls of the positioning plates 10. Moving inwards, the connecting block 17 mounted on the bottom surface of the movable plate 16 will move through the connecting hole 18 on the side wall and along the fixed rod 14 into the transverse opening 12 on the top surface of the shielding base 4. During the movement, the sliders 19 on both sides of the connecting block 17 will slide within the grooves 13 on both sides of the inner wall of the transverse opening 12, forcing the compression spring 15 mounted on the fixed rod 14 to tighten until the pressing rod 21 can no longer be pressed. Then, keep the pressing force on the pressing rod 21 unchanged and pick up the electromagnetic screen with the other hand. The shield 3 is fitted onto the outside of the reverse transformer body 1, and the positioning plate 10 on the top surface of the shielding base 4 is inserted into the positioning hole 6 on the bottom surface of the electromagnetic shield 3. After the electromagnetic shield 3 is positioned and fitted, the hand pressing the pressing rod 21 is released. At this time, the compression spring 15 will perform an elastic recovery and extension operation, and push the connecting block 17 to move the movable plate 16 outward until the limiting rod 20 on the outer side wall of the movable plate 16 is inserted into the limiting hole 7. In this way, the electromagnetic shield 3 can be quickly installed and fixed on the outside of the reverse transformer body 1. When the reverse transformer body 1 is damaged and needs to be disassembled and replaced, the pressing rod 21 can be used to push the movable plate 16 to move the limiting rod 20 out of the limiting hole 7, and then the electromagnetic shield 3 can be removed from the outside of the reverse transformer body 1 for disassembly and maintenance. This achieves the purpose of facilitating the disassembly and assembly of the anti-interference shield and the disassembly and maintenance of the reverse transformer body 1.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, various improvements can be made to it without departing from the scope of the present utility model, and components can be replaced with equivalents or some technical features can be replaced with equivalents. All such improvements within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-interference shielding cover for a flyback transformer, comprising a flyback transformer body (1), characterized in that: The reverse transformer body (1) is provided with an anti-interference mechanism (2) on the outside. The anti-interference mechanism (2) includes an electromagnetic shield (3), a shield base (4), a fixed rod (14), a compression spring (15), a movable plate (16), and a limiting rod (20). The shield base (4) is fixedly connected to the bottom surface of the reverse transformer body (1), and the electromagnetic shield (3) is sleeved on the outside of the reverse transformer body (1). The fixed rod (14) is fixedly connected to both sides of the top surface of the electromagnetic shield (3), and the compression spring (15) is sleeved on the outside of the fixed rod (14). The movable plate (16) is movably connected to the fixed rod (14) through the connecting block (17) at the bottom end, and the connecting block (17) is also fixedly connected to the compression spring (15). The limiting rod (20) is fixedly connected to the outer wall of the movable plate (16) and passes through the electromagnetic shield (3).

2. The interference shield for a flyback transformer of claim 1, wherein: The top surface of the shielding base (4) is provided with a number of pin holes (8), and the bottom surface of the shielding base (4) is fixedly installed with a number of pin sleeves (9) corresponding to the pin holes (8).

3. The interference shield for a flyback transformer of claim 2, wherein: A set of symmetrical positioning plates (10) are fixedly installed on the top surface of the shielding base (4), and through holes (11) are provided on the side wall of the positioning plates (10).

4. The interference shield for a flyback transformer of claim 3, wherein: The top surface of the electromagnetic shield (3) is provided with lead wire holes (5), and the bottom surface of the electromagnetic shield (3) is provided with positioning ports (6) corresponding to the positioning plate (10). The outer wall of the electromagnetic shield (3) and above the positioning ports (6) are also provided with limit holes (7).

5. The interference shield for a flyback transformer of claim 4, wherein: The top surface of the shielding base (4) is also provided with a set of symmetrical horizontal openings (12), and the inner side walls of the horizontal openings (12) are respectively provided with sliding grooves (13).

6. The interference shield for a flyback transformer of claim 5, wherein: A fixing rod (14) is fixedly installed inside the transverse opening (12), and a compression spring (15) is fitted on the outside of the fixing rod (14). The inner end of the compression spring (15) is fixedly installed together with one end wall inside the transverse opening (12). A connecting block (17) is fixedly installed on the bottom surface of the movable plate (16), and a connecting hole (18) is opened on the side wall of the connecting block (17). The connecting block (17) is movably installed together with the fixing rod (14) through the connecting hole (18), and the compression spring (15) The outer end of the plate is fixedly installed together with the connecting block (17). The two side walls of the connecting block (17) are also fixedly installed with sliders (19), and the sliders (19) are movably installed in the slide groove (13). The upper side wall of the movable plate (16) is fixedly installed with a limit rod (20), and the limit rod (20) is inserted into the limit hole (7). The outer side wall of the movable plate (16) and below the limit rod (20) is also fixedly installed with a pressing rod (21), and the pressing rod (21) passes through the through hole (11).

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