Power transformer for liquid crystal display television

Abstract

The utility model relates to the technical field of transformers, in particular to a power transformer for a liquid crystal display television, which comprises a substrate, an insulating cylinder, a first coil, a second coil, a first shielding case, a second shielding case and a frame. According to the utility model, by optimizing the structural design of the insulating cylinder, the first shielding case and the second shielding case can be well installed, specifically, the first coil is wound, then the first shielding case is installed, then the second coil is wound, then the second shielding case is installed, and finally the frame body is installed; the structure is stable, production and manufacturing are easy, and meanwhile it is guaranteed that the power transformer has the good magnetic field interference shielding effect.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a power transformer for liquid crystal televisions. Background Art

[0002] With the rapid development of LCD TV integration, LCD TVs are becoming thinner, lighter and smaller, which makes the internal circuit board structure arranged more densely. Among them, the magnetic field generated by the power transformer is easy to interfere with and affect the normal operation of other surrounding electronic components. This requires structural improvements to the power transformer to achieve a good shielding effect on magnetic field interference.

[0003] The current power transformers do not have the effect of shielding magnetic field interference and cannot cope with various increasingly integrated and miniaturized electrical appliances. Therefore, the utility model provides a new type of power transformer for LCD TVs. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and provides a power transformer for a liquid crystal television.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Power transformer for LCD TV, including:

[0007] substrate;

[0008] An insulating cylinder, wherein the bottom end of the insulating cylinder has an end plate, and the end plate at the bottom end of the insulating cylinder is fixedly connected to the top of the base plate, the top end of the insulating cylinder is open, and the inner side of the insulating cylinder is fixedly connected to an iron core, the top of the iron core is fixedly connected to an axis head, the axis head extends upward from the opening at the top end of the insulating cylinder to the insulating cylinder, the outer side of the insulating cylinder is fixedly connected to a second separating ring, a first separating ring, and a third separating ring in sequence from bottom to top, the outer side of the insulating cylinder is located between the second separating ring and the first separating ring to form a first area, the outer side of the insulating cylinder is located between the first separating ring and the third separating ring to form a second area, a first coil is wound on the first area, and a second coil is wound on the second area;

[0009] A first shielding cover, wherein the first shielding cover is sleeved on the outside of the first coil, and the inner side of the top end of the first shielding cover is clamped with the first separation ring;

[0010] A second shielding cover, wherein the second shielding cover is sleeved on the outside of the second coil, and the annular top platform at the top of the second shielding cover is clamped with the third separation ring, and the annular top platform is pressed on the step formed by the shaft head and the iron core;

[0011] The frame is clamped on the outer side of the insulating cylinder in a downward opening manner, and the frame is fixedly connected to the base plate, and a positioning opening is opened at the inner bottom of the frame and at a position corresponding to the shaft head.

[0012] As a further description of the above technical solution:

[0013] The second separation ring is located at the bottom end of the insulating cylinder, and the third separation ring is located at the top end of the insulating cylinder.

[0014] As a further description of the above technical solution:

[0015] A mounting hole is provided on the upper surface of the substrate, an injection molding block is fixedly connected to the inner side of the mounting hole, and a pin is provided at the bottom of the injection molding block, and the pin is electrically connected to the first coil or the second coil.

[0016] As a further description of the above technical solution:

[0017] A wire cavity is provided inside the frame body at a position corresponding to the injection molding block.

[0018] As a further description of the above technical solution:

[0019] A mounting plate frame is fixedly connected to the top of the base plate, and the mounting plate frame is fixedly connected to the frame through an insertion shaft.

[0020] As a further description of the above technical solution:

[0021] The first shielding cover and the second shielding cover are both annular metal sheets.

[0022] The utility model has the following beneficial effects:

[0023] Compared with the prior art, the power transformer for LCD TV optimizes the structural design of the insulating cylinder so that the first shielding cover and the second shielding cover can be well installed. Specifically, the first coil is wound first, and then the first shielding cover is installed, and then the second coil is wound, and then the second shielding cover is installed, and finally the frame is installed, so that the structure is stable and easy to produce, and at the same time it is ensured that the power transformer has a good effect of shielding magnetic field interference.

[0024] Compared with the prior art, the power transformer for LCD TVs is designed with an insulating cylinder with a built-in iron core, so that the shape of the insulating cylinder is easy to process (manufactured by injection molding process) and no processing is required on the iron core, thereby simplifying the production process and reducing the manufacturing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a three-dimensional diagram of a power transformer for a liquid crystal television.

[0026] Figure 2 This is a front view of the power transformer for LCD TV proposed by the utility model.

[0027] Figure 3 This is a top view of the power transformer for a liquid crystal television proposed by the utility model.

[0028] Figure 4 for Figure 3 Section view of the section line at AA in the middle.

[0029] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0030] Figure 6 The utility model is a three-dimensional schematic diagram of the transformer main body of the power transformer for the LCD TV.

[0031] Figure 7 The utility model is a three-dimensional schematic diagram of the insulating cylinder and the iron core of the power transformer for the LCD TV.

[0032] Legend:

[0033] 1. Base plate; 2. Mounting hole; 3. Mounting plate frame; 4. Insulating cylinder; 5. First separation ring; 6. Second separation ring; 7. Third separation ring; 8. Iron core; 9. Shaft head; 10. Frame; 11. Positioning port; 12. First coil; 13. Second coil; 14. First shielding cover; 15. Second shielding cover; 151. Annular top platform; 16. Wire cavity; 17. Injection block; 18. Pin; a. First area; b. Second area. DETAILED DESCRIPTION

[0034] Reference Figure 1-Figure 7 The power transformer for a liquid crystal television provided by the utility model comprises: a substrate 1, an insulating cylinder 4, a first coil 12, a second coil 13, a first shielding cover 14, a second shielding cover 15 and a frame 10.

[0035] Among them, the bottom end of the insulating cylinder 4 has an end plate, the top end of the insulating cylinder 4 is open, the end plate at the bottom end of the insulating cylinder 4 is fixedly connected to the top of the substrate 1, and can be fixedly connected by glue. The inner side of the insulating cylinder 4 is fixedly connected with an iron core 8, and the iron core 8 and the insulating cylinder 4 are also fixedly connected by glue. The top of the iron core 8 is fixedly connected with an axis head 9, and the axis head 9 extends upward from the opening at the top end of the insulating cylinder 4 to the insulating cylinder 4. The diameter of the axis head 9 is smaller than the axis of the iron core 8. A step portion is formed at the connection between the top end of the iron core 8 and the axis head 9. The axis head 9 is used to position the frame 10. The outer side of the insulating cylinder 4 is fixed from bottom to top in sequence. The second separating ring 6, the first separating ring 5, and the third separating ring 7 are fixedly connected, the second separating ring 6 is located at the bottom end of the insulating cylinder 4, the third separating ring 7 is located at the top end of the insulating cylinder 4, and the first region a is formed on the outside of the insulating cylinder 4 and between the second separating ring 6 and the first separating ring 5, and the second region b is formed on the outside of the insulating cylinder 4 and between the first separating ring 5 and the third separating ring 7. The first region a is wound with a first coil 12, and the second region b is wound with a second coil 13. The two groups of coils (the first coil 12 and the second coil 13) arranged in parallel along the axial direction of the iron core 8 generate electromagnetic induction to achieve voltage reduction.

[0036] The first shielding cover 14 is sleeved on the outside of the first coil 12, and the inner side of the top end of the first shielding cover 14 is clamped with the first separating ring 5. The second shielding cover 15 is sleeved on the outside of the second coil 13, and the annular top platform 151 at the top end of the second shielding cover 15 is clamped with the third separating ring 7, and the annular top platform 151 is pressed on the step formed by the shaft head 9 and the iron core 8.

[0037] The first shielding cover 14 and the second shielding cover 15 are both annular metal sheets or the first shielding cover 14 and the second shielding cover 15 are both injection molded parts with built-in metal rings, which are used to isolate the magnetic field generated by the first coil 12 and the second coil 13 to avoid interference and influence on the normal operation of other surrounding electronic components.

[0038] The frame 10 is clamped on the outer side of the insulating cylinder 4 with its opening facing downward, and is fixedly connected to the substrate 1 . A positioning opening 11 is provided at the inner bottom of the frame 10 corresponding to the shaft head 9 , and the frame 10 is used to stabilize the insulating cylinder 4 .

[0039] By optimizing the structural design of the insulating cylinder 4, the first shielding cover 14 and the second shielding cover 15 can be well installed. Specifically, the first coil 12 is wound first, and then the first shielding cover 14 is installed, and then the second coil 13 is wound, and then the second shielding cover 15 is installed, and finally the frame 10 is installed, so that the structure is stable and easy to produce, and at the same time it is ensured that the power transformer has a good effect of shielding magnetic field interference.

[0040] In one embodiment, a mounting hole 2 is provided on the upper surface of the substrate 1, and an injection molding block 17 is fixedly connected to the inner side of the mounting hole 2. A pin 18 is provided at the bottom of the injection molding block 17, and the pin 18 is electrically connected to the first coil 12 or the second coil 13. The pin 18 is injection molded together with the injection molding block 17, and the top of the pin 18 is exposed from the injection molding block 17, so that it is easy to be welded with the wire led out of the first coil 12 or the second coil 13. The injection molding block 17 is tightly matched with the substrate 1 and is fixed by glue or ultrasonic welding.

[0041] In one embodiment, a wire cavity 16 is opened inside the frame 10 and at a position corresponding to the injection molding block 17 to provide space for wiring at the top end of the pins 18 at the top of the injection molding block 17 .

[0042] In one embodiment, a mounting plate frame 3 is fixedly connected to the top of the base plate 1 , and the mounting plate frame 3 is fixedly connected to the frame 10 via an insertion shaft.

[0043] Specifically, the frame 10 is aligned with the mounting plate frame 3 , and then heated metal nails are used to penetrate the frame 10 and the mounting plate frame 3 , so that the frame 10 and the mounting plate frame 3 are fixedly connected together.

[0044] Another way is to open small holes on the frame 10 and the mounting plate frame 3, and then use an insertion shaft with an interference fit with the small hole to insert into the small holes on the frame 10 and the mounting plate frame 3.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power transformer for a liquid crystal television, comprising a substrate (1), characterized in that: Also includes: An insulating cylinder (4), wherein the bottom end of the insulating cylinder (4) has an end plate, and the end plate at the bottom end of the insulating cylinder (4) is fixedly connected to the top of the base plate (1); the top end of the insulating cylinder (4) is open, and the inner side of the insulating cylinder (4) is fixedly connected to an iron core (8), the top of the iron core (8) is fixedly connected to an axis head (9), and the axis head (9) extends upward from the opening at the top end of the insulating cylinder (4) to the insulating cylinder (4); the outer side of the insulating cylinder (4) is fixedly connected to a second separation ring (6), a first separation ring (5), and a third separation ring (7) in sequence from bottom to top; the outer side of the insulating cylinder (4) and located between the second separation ring (6) and the first separation ring (5) form a first area (a); the outer side of the insulating cylinder (4) and located between the first separation ring (5) and the third separation ring (7) form a second area (b); the first area (a) is wound with a first coil (12), and the second area (b) is wound with a second coil (13); A first shielding cover (14), the first shielding cover (14) being sleeved on the outside of the first coil (12), and the inner side of the top end of the first shielding cover (14) being clamped with the first separation ring (5); A second shielding cover (15), the second shielding cover (15) being sleeved on the outside of the second coil (13), and the annular top platform (151) at the top of the second shielding cover (15) being clamped with the third separation ring (7), and the annular top platform (151) being pressed against a step formed by the shaft head (9) and the iron core (8); A frame (10) is clamped on the outside of the insulating cylinder (4) with its opening facing downward, and the frame (10) is fixedly connected to the base plate (1), and a positioning opening (11) is provided at a position corresponding to the shaft head (9) at the inner bottom of the frame (10).

2. The power transformer for LCD TV according to claim 1, characterized in that: The second separation ring (6) is located at the bottom end of the insulating cylinder (4), and the third separation ring (7) is located at the top end of the insulating cylinder (4).

3. The power transformer for LCD TV according to claim 1, characterized in that: The upper surface of the substrate (1) is provided with a mounting hole (2), the inner side of the mounting hole (2) is fixedly connected with an injection molding block (17), the bottom of the injection molding block (17) has a pin (18), and the pin (18) is electrically connected to the first coil (12) or the second coil (13).

4. The power transformer for LCD TV according to claim 3, characterized in that: A wire cavity (16) is provided on the inner side of the frame (10) at a position corresponding to the injection molding block (17).

5. The power transformer for LCD TV according to claim 1, characterized in that: A mounting plate frame (3) is fixedly connected to the top of the base plate (1), and the mounting plate frame (3) is fixedly connected to the frame (10) via an insertion shaft.

6. The power transformer for LCD TV according to claim 1, characterized in that: The first shielding cover (14) and the second shielding cover (15) are both annular metal sheets.

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