Power supply filter

Abstract

The utility model discloses a power supply filter, which comprises an upper shell, a lower shell and a PCB unit, the upper shell is recessed to form a first accommodating part, and opening parts communicated with the first accommodating part are formed on two opposite side walls of the upper shell; the lower shell and the upper shell are assembled together, and the lower shell is sunken to form a second accommodating part; the PCB unit comprises a PCB, the PCB is installed in the first containing part, the peripheral side wall of the PCB is adjacent to the inner side wall of the upper shell, an inductor is welded to the surface, facing the lower shell, of the PCB, the inductor extends into the second containing part, a large capacitor, a small capacitor, a terminal and a resistor are welded to the surface, facing the upper shell, of the PCB at intervals, and the terminal is located in the opening part. According to the power supply filter, the heat dissipation effect of the inductor can be effectively improved, the stability of the PCB unit in the upper shell and the lower shell is improved, meanwhile, the upper shell and the lower shell are subjected to injection molding in the same color, manufacturing of the upper shell and the lower shell is facilitated, and cost is reduced.

Description

Technical field:

[0001] The utility model relates to the technical field of power supply filters, in particular to a power supply filter. Background technology:

[0002] The power filter in the prior art comprises an upper shell, a lower shell and a PCB board. The upper shell and the lower shell are arranged opposite to each other and are connected to each other by snapping. The PCB board is provided with capacitors, inductors and resistors.

[0003] Please refer to Figure 1 As shown, in the existing power filter PCB unit, the inductor 1a and the two capacitors 1b are located on the same side of the PCB board and the inductor is arranged between the two capacitors. The shielding area of ​​the capacitor to the inductor is large, and the convection air (such as Figure 1 The direction of the arrow in the middle) will be blocked by the capacitor and is not conducive to the heat dissipation of the inductor.

[0004] In the existing power filter, the PCB unit 1c is vertically inserted into the slot 1d of the lower shell. There is only one slot in the lower shell and the upper shell to limit the PCB unit to the left and right. When the power filter vibrates, the stability of the PCB unit is low.

[0005] Please refer to Figure 2 As shown, the existing power filter PCB unit is provided with terminals at two opposite ends, each terminal is provided with four wiring holes, the two outermost wiring holes of the four wiring holes are grounded, and the other two are connected to the neutral wire and the live wire respectively. The copper layer arrangement on the PCB board is complicated, the component arrangement on the PCB board is complicated, the space utilization rate is low, and the cost is high.

[0006] Meanwhile, in the existing power filter, the upper shell 1e and the lower shell 1f are made of materials of different colors. Therefore, in the process of making the upper shell and the lower shell of different colors, it is necessary to clean the barrel, which increases the cost.

[0007] Therefore, it is necessary to improve the existing technology to solve the shortcomings of the existing technology. Utility model content:

[0008] The utility model provides a power filter in order to solve the problems existing in the above-mentioned prior art, which can effectively improve the heat dissipation effect of the inductor, improve the stability of the PCB unit in the upper shell and the lower shell, facilitate the spatial arrangement of components on the PCB board, and improve space utilization.

[0009] The technical solution adopted by the utility model includes: a power supply filter, comprising:

[0010] An upper shell, wherein the upper shell is concave to form a first receiving portion, and openings that are intersecting with the first receiving portion are formed on opposite side walls of the upper shell;

[0011] A lower shell, the lower shell is assembled with the upper shell, and the lower shell is recessed to form a second receiving portion;

[0012] The PCB unit includes a PCB board, the PCB board is installed in the first housing portion and the four side walls of the PCB board are adjacent to the inner wall of the upper shell, an inductor is welded on the surface of the PCB board facing the lower shell, the inductor extends into the second housing portion, and component assemblies are welded at intervals on the surface of the PCB board facing the upper shell.

[0013] Furthermore, heat dissipation holes are formed on the side wall of the upper shell on which the opening is formed and on the side wall of the lower shell on the same side as the opening.

[0014] Furthermore, the component assembly includes two groups in total, the inductor is located between the two groups of component assemblies, in one group of component assemblies, the small capacitor is located between the large capacitor and the terminal, and in the other group of component assemblies, the resistor is located between the large capacitor and the inductor, and the terminal is located in the opening.

[0015] Furthermore, an insulating plate is welded on the PCB board, and the insulating plate is located between the PCB board and the coil of the inductor.

[0016] Furthermore, the upper shell is provided with a guide portion for limiting the position of the PCB board.

[0017] Furthermore, the guide portion includes a first guide bar, which is formed on two side walls of the upper shell where an opening is formed, and the lower end of the first guide bar extends below the lower end of the upper shell, and the first guide bar is used to be slidably connected to the outer edge of the PCB board.

[0018] Furthermore, the guide portion also includes a second guide strip, which is formed on two side walls of the upper shell where no opening is formed, and the second guide strip includes a first part extending to the top wall of the upper shell and a second part connected to the first part and extending beyond the lower end of the upper shell, the width of the first part is greater than the width of the second part, the second part is used to be slidably connected to the outer edge of the PCB board, and the first part is used to support the PCB board.

[0019] Furthermore, a notch is formed on the outer edge of the PCB board to slide with the first guide bar and the second guide bar.

[0020] Furthermore, a snap hole is formed on the side wall of the upper shell without an opening, and a snap strip is formed on a protrusion on the side wall of the lower shell corresponding to the snap hole, and the upper end of the snap strip is folded to form a hook portion that cooperates with the snap hole.

[0021] Furthermore, the upper protrusion of the side wall of the lower shell without the buckle strip is formed with a first pressing strip extending along the assembly direction of the upper shell and the lower shell, and the upper end of the first pressing strip extends above the upper end of the lower shell.

[0022] Furthermore, the lower shell is formed with a buckle strip on the side wall of the protrusion to form a second pressing strip, the second pressing strip extends along the assembly direction of the upper shell and the lower shell and the upper end of the second pressing strip extends to above the upper end of the lower shell.

[0023] Furthermore, the first pressing strip and the second pressing strip abut against the PCB board to fix the PCB board in the upper shell.

[0024] Furthermore, a first notch portion is formed on the inner surface of the lower end of the upper shell side wall, and a gap is formed between the first notch portion and the first guide bar and the second guide bar.

[0025] Furthermore, a second notch portion is formed on the outer surface of the upper end of the lower shell side wall. When the upper shell and the lower shell are installed together, the first notch portion and the second notch portion are snapped together, and the second notch portion is located in the gap formed between the first notch portion and the first guide bar and the second guide bar.

[0026] Furthermore, the terminal includes four wiring holes arranged in sequence, wherein the two wiring holes in the middle are grounded, and the remaining two are connected to the neutral wire and the live wire respectively.

[0027] Furthermore, a guide rail buckle is installed at the bottom of the lower shell, and a spring is installed between the guide rail buckle and the lower shell.

[0028] The utility model has the following beneficial effects:

[0029] (1) In the power filter of the utility model, the inductor and the capacitor are arranged on different surfaces of the PCB board, so the capacitor will not block the inductor, and the convective air entering the upper shell and the lower shell can directly pass through the inductor, greatly improving the heat dissipation effect of the inductor;

[0030] (2) The PCB unit in the power filter of the utility model is installed in the upper shell horizontally, and a guide strip is formed in the upper shell to match the notch formed on the outer edge of the PCB board, and a pressing strip is formed in the lower shell to abut against the PCB board, thereby improving the stability of the entire PCB unit;

[0031] (3) The two wiring holes in the middle of each terminal of the power filter of the utility model are grounded, and the other two are connected to the neutral wire and the live wire respectively. The copper layer layout on the PCB is simple, which is convenient for the spatial arrangement of components on the PCB, greatly saving space volume.

[0032] (4) The upper shell and the lower shell of the power filter of the utility model are injection molded with the same color material, and there is no need to replace the material during the injection molding process of the upper shell and the lower shell, thereby reducing costs; Description of the drawings:

[0033] Figure 1 This is a schematic diagram of the internal structure of an existing power supply filter.

[0034] Figure 2 This is a schematic diagram of the copper layer arrangement on an existing PCB board.

[0035] Figure 3 This is a schematic diagram of the assembly of the power filter of the utility model.

[0036] Figure 4 This is a schematic diagram of the decomposition of the power filter of the utility model.

[0037] Figure 5 Schematic diagram of the upper shell.

[0038] Figure 6 Schematic diagram of the lower shell.

[0039] Figure 7 This is a schematic diagram of the PCB unit.

[0040] Figure 8 It is a schematic diagram of the copper layer arrangement on the PCB board of the utility model. Specific implementation method:

[0041] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0043] The power supply filter provided in the present application is described in detail below in conjunction with specific embodiments.

[0044] Please refer to Figures 3 to 8As shown, the embodiment of the utility model proposes a power filter, which includes an upper shell 1, a lower shell 2, and a PCB unit 3 installed in the space assembled by the upper shell 1 and the lower shell 2. The upper shell 1 and the lower shell 2 are both made of PC material, which has good chemical stability and high impact resistance.

[0045] The upper shell 1 is recessed to form a first receiving portion 10, and openings 11 are formed on both side walls in the width direction of the upper shell 1 to communicate with the receiving portion 10. A first guide bar 14 is protruded on the side wall in the width direction of the upper shell 1. The lower end of the first guide bar 14 extends below the lower end of the upper shell 1.

[0046] A buckle hole 12 is formed on the side wall of the upper shell 1 in the length direction, and a second guide bar 13 is protruded on the side wall of the upper shell 1 in the length direction. The second guide bar 13 extends along the assembly direction of the upper shell 1 and the lower shell 2.

[0047] The second guide bar 13 includes a first portion 130 extending to the top wall of the upper shell 1 and a second portion 131 connected to the first portion 130 and extending beyond the lower end of the upper shell 1, and the width of the first portion 130 is greater than the width of the second portion 131. The first guide bar 14 and the second guide bar 13 serve as guide portions for limiting the position of the PCB board.

[0048] A first notch portion 15 is formed on the inner surface of the lower end of the side wall of the upper shell 1 , and a gap is formed between the first notch portion 15 and the first guide bar 14 and the second guide bar 13 .

[0049] The lower shell 2 is recessed to form a second receiving portion 20, and the side wall of the lower shell 2 in the width direction is convex to form a first pressing strip 21 extending along the assembly direction of the upper shell 1 and the lower shell 2, and the upper end of the first pressing strip 21 extends above the upper end of the lower shell 2.

[0050] A buckle strip 22 extending along the assembly direction of the upper shell 1 and the lower shell 2 is formed on the upper protrusion of the side wall in the length direction of the lower shell 2, and the upper end of the buckle strip 22 extends to the upper end of the lower shell 2. The upper end of the buckle strip 22 is folded to form a hook portion 220 that matches the buckle hole 12. A second pressing strip 23 is formed on the upper protrusion of the side wall in the length direction of the lower shell 2, and the second pressing strip 23 extends along the assembly direction of the upper shell 1 and the lower shell 2 and the upper end of the second pressing strip 23 extends to the upper end of the lower shell 2.

[0051] A second notch portion 24 is formed on the outer surface of the upper end of the side wall of the lower shell 2. When the upper shell 1 and the lower shell 2 are installed together, the first notch portion 15 and the second notch portion 24 are snapped together, and the second notch portion 24 is located in the gap formed between the first notch portion 15 and the first guide bar 14 and the second guide bar 13.

[0052] Heat dissipation holes 16 are formed on both side walls of the upper shell 1 and the lower shell 2 in the width direction, which is beneficial to natural convection heat dissipation from top to bottom.

[0053] The PCB unit 3 includes a PCB board 30, an inductor 31 is welded on the surface of the PCB board 30 facing the lower shell 2, and an insulating plate 35 is welded between the PCB board 30 and the coil of the inductor 31. By adding the insulating plate 35, the insulation performance between the inductor 31 and the PCB board 30 can be improved, and the inductor 31 and the PCB board 30 are protected in both directions.

[0054] A group of component assemblies are welded on the surface of the PCB board 30 facing the upper shell 1 and located on both sides of the inductor 31. Each group of component assemblies includes a large capacitor 32, a small capacitor 33 and a terminal 36. The terminal 36 is located in the opening 11, and the small capacitor 33 is located between the large capacitor 32 and the terminal 36. A resistor 34 is also included in one group of component assemblies. The resistor 34 is welded between the large capacitor 32 and the inductor 31. Each terminal 36 includes four wiring holes arranged in sequence, wherein the two wiring holes in the middle are grounded, and the other two are connected to the neutral line and the live line respectively. By arranging in this way, the copper layer 6 on the PCB board is simply arranged, which is convenient for the spatial arrangement of components on the PCB board, and greatly saves space volume.

[0055] A guide rail buckle 5 is installed at the bottom of the lower shell 2 , and a spring 4 is installed between the guide rail buckle 5 and the lower shell 2 .

[0056] The assembly of the power filter of the utility model is as follows: first, the large capacitor 32, the small capacitor 33, the terminal 33 and the resistor 34 are welded to the PCB board 30 by wave soldering technology, and the inductor 31 is welded to the PCB board 30 by manual spot welding technology. The PCB board 30 is installed in the upper shell 1 by sliding along the first guide bar 14 and the second guide bar 13 through the notch 37 formed on the outer edge of the PCB board 30. At this time, the PCB board 30 is just supported on the first part 130, and the terminal 33 is just located in the opening 11. Then, the buckle bar 22 formed on the lower shell 2 is buckled with the buckle hole 12 on the upper shell 1 to install the lower shell 2 and the upper shell 1 together. At this time, the first pressing bar 21 and the second pressing bar 23 are abutted against the PCB board 30, the first notch portion 15 and the second notch portion 24 are buckled together, and the second notch portion 24 is located in the gap formed between the first notch portion 15 and the first guide bar 14 and the second guide bar 13. Finally, the guide rail buckle 5 and the spring 4 are installed on the lower surface of the lower shell 2, and the guide rail buckle 5 is installed on the guide rail (not shown) to complete the installation of the entire power filter.

[0057] The upper shell and the lower shell of the power filter of the utility model are injection-molded with the same color material, and the material does not need to be replaced during the injection molding process of the upper shell and the lower shell, which can reduce the cost.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A power supply filter, characterized in that: include: An upper shell (1), the upper shell (1) being recessed to form a first receiving portion (10), and opening portions (11) interpenetrating with the first receiving portion (10) being formed on opposite side walls of the upper shell (1); A lower shell (2), the lower shell (2) being assembled with the upper shell (1), the lower shell (2) being recessed to form a second receiving portion (20); A PCB unit (3), the PCB unit (3) comprising a PCB board (30), the PCB board (30) being installed in a first receiving portion (10) and the four side walls of the PCB board (30) being closely adjacent to the inner side walls of the upper shell (1), an inductor (31) being welded on the surface of the PCB board (30) facing the lower shell (2), the inductor (31) extending into the second receiving portion (20), and component assemblies being welded at intervals on the surface of the PCB board (30) facing the upper shell (1).

2. The power supply filter according to claim 1, characterized in that: Heat dissipation holes (16) are formed on the side wall of the upper shell (1) on which the opening (11) is formed, and on the side wall of the lower shell (2) on the same side as the opening (11).

3. The power supply filter according to claim 2, characterized in that: The component assemblies include two groups in total, the inductor (31) is located between the two groups of component assemblies, each group of component assemblies includes a large capacitor (32), a small capacitor (33) and a terminal (36), in one group of component assemblies, the small capacitor (33) is located between the large capacitor (32) and the terminal (36), and in the other group of component assemblies, a resistor (34) is also included, the resistor (34) is located between the large capacitor (32) and the inductor (31), and the terminal (36) is located in the opening (11).

4. The power supply filter according to claim 3, characterized in that: An insulating plate (35) is welded on the PCB board (30), and the insulating plate (35) is located between the PCB board (30) and the coil of the inductor (31).

5. The power supply filter according to claim 1, characterized in that: The upper shell (1) is provided with a guide portion for limiting the position of the PCB board (30).

6. The power supply filter according to claim 5, characterized in that: The guide portion comprises a first guide strip (14), the first guide strip (14) being formed on two side walls of the upper shell (1) where the opening portion (11) is formed, the lower end of the first guide strip (14) extending below the lower end of the upper shell (1), the first guide strip (14) being used for being slidably connected to the outer edge of the PCB board (30).

7. The power supply filter according to claim 6, characterized in that: The guide portion further comprises a second guide strip (13), the second guide strip (13) being formed on two side walls of the upper shell (1) where the opening portion (11) is not formed, the second guide strip (13) comprising a first portion (130) extending to the top wall of the upper shell (1) and a second portion (131) connected to the first portion (130) and extending beyond the lower end of the upper shell (1), the width of the first portion (130) being greater than the width of the second portion (131), the second portion (131) being used for being slidably connected to the outer edge of the PCB board (30), and the first portion (130) being used for supporting the PCB board (30).

8. The power supply filter according to claim 7, characterized in that: A notch (37) is formed on the outer edge of the PCB board (30) and is slidably matched with the first guide strip (14) and the second guide strip (13).

9. The power supply filter according to claim 1, characterized in that: A snap hole (12) is formed on the side wall of the upper shell (1) where the opening (11) is not formed, and a snap strip (22) is formed on the side wall of the lower shell (2) corresponding to the snap hole (12), and the upper end of the snap strip (22) is folded to form a hook portion (220) that matches the snap hole (12).

10. The power supply filter according to claim 9, characterized in that: The upper protrusion of the side wall of the lower shell (2) where the buckle strip (22) is not formed is formed with a first pressing strip (21) extending along the assembly direction of the upper shell (1) and the lower shell (2), and the upper end of the first pressing strip (21) extends to above the upper end of the lower shell (2).

11. The power supply filter according to claim 10, characterized in that: The lower shell (2) is formed with a buckle strip (22) on the side wall, and a second pressing strip (23) is formed by a protrusion. The second pressing strip (23) extends along the assembly direction of the upper shell (1) and the lower shell (2), and the upper end of the second pressing strip (23) extends to above the upper end of the lower shell (2).

12. The power supply filter according to claim 11, characterized in that: The first pressing strip (21) and the second pressing strip (23) are abutted against the PCB board (30) to fix the PCB board (30) in the upper shell (1).

13. The power supply filter according to claim 7, characterized in that: A first notch portion (15) is formed on the inner surface of the lower end of the side wall of the upper shell (1), and a gap is formed between the first notch portion (15) and the first guide bar (14) and the second guide bar (13).

14. The power supply filter according to claim 13, characterized in that: A second notch portion (24) is formed on the outer surface of the upper end of the side wall of the lower shell (2); when the upper shell (1) and the lower shell (2) are mounted together, the first notch portion (15) and the second notch portion (24) are snapped together, and the second notch portion (24) is located in a gap formed between the first notch portion (15) and the first guide strip (14) and the second guide strip (13).

15. The power supply filter according to claim 3, characterized in that: The terminal (36) comprises four wiring holes arranged in sequence, wherein the two wiring holes in the middle are grounded, and the other two are connected to the neutral wire and the live wire respectively.

16. The power supply filter according to claim 1, characterized in that: A guide rail buckle (5) is installed at the bottom of the lower shell (2), and a spring (4) is installed between the guide rail buckle (5) and the lower shell (2).

Images