Charging device

Abstract

The embodiment of the utility model relates to a charging device. The charging device comprises, for example, a first circuit board provided with a main circuit; the second circuit board is provided with an auxiliary circuit, and the auxiliary circuit is connected with the main circuit; wherein the main circuit comprises a rectifying circuit; and the filter circuit is electrically connected with the rectifying circuit. According to the utility model, the main circuit comprising the rectification circuit and the filter circuit is designed on the first circuit board, and other auxiliary circuits are arranged on the second circuit board, so that the internal space of the charging device can be effectively utilized, the arrangement of a plurality of circuits does not occupy much space, and the overall size of the circuit board is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of charging, in particular to a charging device. Background Art

[0002] Electronic products such as mobile phones, tablets, and computers usually need to be charged through charging devices such as power adapters.

[0003] The existing charging device includes multiple circuits, including a fuse circuit, an EMI (Electromagnetic Interference) anti-electromagnetic interference circuit, a charging protocol circuit, a transformer, a driver chip, a rectifier circuit, a filter circuit, and other circuits. In the existing charging device, these circuits need to be arranged according to the direction of the current. With the existing technology, the area of the circuit board that accommodates these circuits must be large enough. If the electronic components of multiple circuits are installed on the same circuit board, the volume of the charging device will be too large. Therefore, how to arrange these circuits to achieve the effect of reducing the volume, portability, and increasing energy density is a problem that needs to be solved. Utility Model Content

[0004] Therefore, in order to overcome at least some of the defects and shortcomings of the above-mentioned prior art, an embodiment of the present invention proposes a charging device to reduce the volume of the charging device and the circuit board.

[0005] In one aspect, an embodiment of the present invention provides a charging device, for example, comprising: a first circuit board provided with a main circuit; a second circuit board provided with a secondary circuit, the secondary circuit being connected to the main circuit; wherein the main circuit comprises: a rectifier circuit; and a filter circuit electrically connected to the rectifier circuit;

[0006] In one embodiment of the present invention, the auxiliary circuit includes: a voltage conversion circuit electrically connected to the rectifier circuit; a drive circuit electrically connected to the voltage conversion circuit; and a charging protocol circuit electrically connected to the voltage conversion circuit and the filter circuit.

[0007] In one embodiment of the present invention, the first circuit board is plug-connected to the second circuit board.

[0008] In one embodiment of the present invention, a protruding portion is provided on the first circuit board, and a slot portion corresponding to the protruding portion is provided on the second circuit board, and the protruding portion is inserted into the slot portion.

[0009] In one embodiment of the present invention, the first circuit board and the second circuit board are arranged vertically.

[0010] In one embodiment of the present invention, the slot portion is arranged close to an edge of the second circuit board; and / or the protrusion is arranged at an edge of the first circuit board and extends and protrudes toward the second circuit board.

[0011] In one embodiment of the present utility model, the rectifier circuit includes a primary rectifier circuit and a secondary rectifier circuit, the primary rectifier circuit and the secondary rectifier circuit are arranged at intervals on the first circuit board, the primary rectifier circuit is electrically connected to the filter circuit, and the secondary rectifier circuit is electrically connected to the filter circuit and the transformer circuit respectively.

[0012] In one embodiment of the present invention, the filter circuit includes a primary filter circuit and a secondary filter circuit, the primary filter circuit is electrically connected to the primary rectifier circuit and the drive circuit, and the secondary filter circuit is electrically connected to the secondary rectifier circuit and the charging protocol circuit.

[0013] In one embodiment of the present utility model, the secondary circuit also includes: a protection circuit and an anti-electromagnetic interference circuit, the protection circuit and the signal shielding circuit are both arranged on the second circuit board, the anti-electromagnetic interference circuit is electrically connected to the secondary rectifier circuit, and the protection circuit is electrically connected to the anti-electromagnetic interference circuit.

[0014] In one embodiment of the present utility model, the auxiliary circuit also includes: a first capacitor, which is arranged on the second circuit board, and the first capacitor is electrically connected to the protection circuit and the anti-electromagnetic interference circuit; a second capacitor, which is arranged on the second circuit board, and the second capacitor is electrically connected to the charging protocol circuit and the voltage conversion circuit.

[0015] In one embodiment of the present invention, the charging device also includes an AC charging pin and a DC interface. The second circuit board is provided with a first connection point and a second connection point which are electrically connected to the protection circuit and the charging protocol circuit respectively. The AC charging pin is electrically connected to the first connection point, and the DC interface is electrically connected to the second connection point.

[0016] As can be seen from the above, the above technical features of the present invention can have the following beneficial effects:

[0017] The utility model arranges the main circuit including the rectifier circuit and the filter circuit on the first circuit board, and arranges the auxiliary circuit on the second circuit board, so that multiple circuits can be arranged with only two circuit boards, and the volume of a single circuit board can be reduced. The cooperation between the first circuit board and the second circuit board can effectively utilize the free space in the charging device, reduce the volume of the charging device and the circuit boards, and make the charging device more convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a charging device provided in an embodiment of the present utility model.

[0020] Figure 2 A schematic structural diagram of another charging device provided in an embodiment of the present utility model.

[0021] Figure 3 for Figure 1 The circuit structure diagram of the charging device shown.

[0022]

Description of the accompanying drawings

[0023] 1: Charging device; 10: First circuit board; 11: Rectifier circuit; 12: Filter circuit; 101: Protrusion; 111: Primary rectifier circuit; 112: Secondary rectifier circuit; 121: Primary filter circuit; 122: Secondary filter circuit; 20: Second circuit board; 21: Drive circuit; 22: Transformer circuit; 23: Charging protocol circuit; 24: Anti-electromagnetic interference circuit; 25: Protection circuit; 26: First capacitor; 27: Second capacitor; 201: Slot portion. DETAILED DESCRIPTION

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

[0025] In this embodiment, the charging device 1 is, for example, a charger, which can charge electronic devices such as laptops, mobile phones, smart watches, etc.

[0026] like Figure 1 As shown, an embodiment of the present invention provides a charging device 1. The charging device 1 includes, for example: a first circuit board 10, a second circuit board 20, a main circuit and a secondary circuit.

[0027] Specifically, the second circuit board 20 is fixedly connected to the first circuit board 10. The main circuit includes a rectifier circuit 11 and a filter circuit 12, and the filter circuit 12 is electrically connected to the rectifier circuit 11. The rectifier circuit 11 and the filter circuit 12 can refer to the rectifier circuit and filter circuit in the charger in the prior art, and the details are not repeated here.

[0028] The main circuit is, for example, a circuit that realizes a main function, such as a rectifier circuit and a filter circuit, and the auxiliary circuit is, for example, all circuits other than the rectifier circuit and the filter circuit.

[0029] Since the insurance circuit, EMI circuit, charging protocol chip (a charging protocol circuit is usually set inside), transformer, driver chip, rectifier circuit and filter circuit in the charger of the prior art need to be arranged according to the direction of the current, the volume of the circuit board that accommodates these circuits needs to be large enough if placed on the same circuit board, which will make the charger too large and not conducive to the portability of the charger. In this application, the main circuits of the rectifier circuit 11 and the filter circuit 12 are set on the first circuit board 10, and the other auxiliary circuits are set on the second circuit board 20, so that multiple circuits only need two circuit boards to complete the arrangement, and the volume of a single circuit board can be reduced, so that the cooperation of the first circuit board 10 and the second circuit board 20 can effectively utilize the free space in the charging device 1, reduce the volume of the charging device 1 and the circuit board, and make the charging device 1 more convenient to carry.

[0030] like Figure 1-Figure 2 As shown, the auxiliary circuit includes a driving circuit 21, a voltage transformation circuit 22, and a charging protocol circuit 23.

[0031] The voltage conversion circuit 22, the drive circuit 21, and the charging protocol circuit 23 are all disposed on the second circuit board 20. The voltage conversion circuit 22 is electrically connected to the rectifier circuit 11 and the drive circuit 21, respectively. The charging protocol circuit 23 is electrically connected to the voltage conversion circuit 21 and the filter circuit 12. The voltage conversion circuit 22 is, for example, a transformer used in conventional chargers, the drive circuit 21 is, for example, a driver chip used in conventional chargers, and the charging protocol circuit is, for example, a charging protocol circuit provided in a charging protocol chip used in conventional chargers.

[0032] In a specific embodiment of the present invention, Figure 3 As shown, the first circuit board 10 and the second circuit board are fixedly connected in a plug-in manner.

[0033] Specifically, the first circuit board 10 is provided with a protrusion 101, and the second circuit board 20 is provided with a slot portion 201 corresponding to the protrusion 101, and the protrusion 101 is inserted into the slot portion 201. The protrusion 101 is a convex solder pad provided on the first circuit board 10. A window is opened to remove the insulating green oil, and then tin is sprayed to simulate the plug-in pin on the first circuit board 10. The slot portion 201 is a concave metal slot provided on the second circuit board 20. The slot is copper-plated, and copper is laid around the metal slot. The window is opened to remove the insulating green oil, and then tin is sprayed. The protrusion 101 of the first circuit board 10 is then inserted into the slot portion 201 of the second circuit board 20 by means of an insert. The protrusion 101 and the slot portion 201 are then welded at the connection position, thereby welding the first circuit board 10 to the second circuit board 20. By plugging and fitting the protrusion 101 on the first circuit board 10 with the slot 201 of the second circuit board 20, the first circuit board 10 is plugged into the second circuit board 20, so that the space required for the circuits arranged on the first circuit board 10 and the second circuit board 20 will not overlap, and will not affect the coordination between the various circuits, thereby rationally utilizing the internal space of the charging device 1.

[0034] Furthermore, the first circuit board 10 and the second circuit board 20 are arranged vertically.

[0035] Specifically, if Figure 3 As shown, the slot portion 201 is arranged close to the edge of the second circuit board 20 ; and / or the protrusion 101 is arranged at the edge of the first circuit board 10 and extends and protrudes toward the second circuit board 20 .

[0036] Furthermore, if Figure 2 and Figure 3 As shown, the rectifier circuit 11 includes, for example, a primary rectifier circuit 111 and a secondary rectifier circuit 112 , and the filter circuit 12 includes, for example, a primary filter circuit 121 and a secondary filter circuit 122 .

[0037] Specifically, the primary rectifier circuit 111 and the secondary rectifier circuit 112 are spaced apart on the first circuit board 10, and the primary filter circuit 121 and the secondary filter circuit 122 are spaced apart on the first circuit board 10. The primary filter circuit 121 electrically connects the primary rectifier circuit 111 and the drive circuit 21, and the secondary filter circuit 122 electrically connects the secondary rectifier circuit 112 and the charging protocol circuit 23. The primary rectifier circuit 111 refers to the first rectification stage in a charging device such as a power adapter or a power supply. The primary rectifier circuit 111 is directly connected to the AC power input and converts the AC power into pulsating DC power, that is, DC power with a certain amount of ripple. This is generally achieved by providing one or more rectifier diodes. The primary filter circuit 121 then performs filtering to further reduce the ripple and noise in the DC power. The secondary rectifier circuit 112 is provided on the secondary side of the transformer. This application utilizes the first circuit board 10 and the second circuit board 20 to connect, allowing the secondary rectifier circuit 112 to be located next to the transformer circuit 22. The secondary rectifier circuit 112 is used to rectify the AC voltage output from the transformer circuit 22, converting the pulsed AC power output from the transformer circuit 22 into smooth DC power, which is then supplied to a load such as a mobile phone or laptop computer via a charging protocol circuit. The secondary rectifier circuit 112 is electrically connected to a secondary filter circuit 122, which further reduces ripple and noise in the DC power through the filtering effect of the secondary filter circuit 122.

[0038] like Figure 2 and Figure 3 As shown, in a preferred embodiment of this embodiment, the auxiliary circuit further includes, for example: an anti-electromagnetic interference circuit 24 , a protection circuit 25 , a first capacitor 26 and a second capacitor 27 .

[0039] Specifically, the anti-electromagnetic interference circuit 24, the protection circuit 25, the first capacitor 26, and the second capacitor 27 are all disposed on the second circuit board 20. The anti-electromagnetic interference circuit 24 is electrically connected to the primary rectifier circuit 111 in the rectifier circuit 11, and the protection circuit 25 is electrically connected to the anti-electromagnetic interference circuit 24. The first capacitor 26 is electrically connected to the protection circuit 25 and the anti-electromagnetic interference circuit 24; the second capacitor 27 is electrically connected to the charging protocol circuit 23 and the voltage conversion circuit 22. The anti-electromagnetic interference circuit 24 is, for example, an EMI circuit in a conventional charger. An EMI circuit is a circuit used to suppress or reduce the effects of electromagnetic interference. It is electrically connected to the primary filter circuit 121 in the first rectification stage to further reduce electromagnetic interference. The protection circuit 25 is, for example, a fuse, circuit breaker, or electronic fuse used to protect the circuit. The first capacitor 26 is a Y capacitor, which is used to isolate different potentials, particularly in safety-related circuits such as power adapters. Y capacitors are primarily used to suppress differential mode noise, i.e., noise generated by current flowing between two wires. The second capacitor is an X capacitor, which can be used in a power supply filter. In this embodiment, the X capacitor helps reduce electromagnetic interference, especially common-mode noise, because the X capacitor can conduct current in two directions, thereby helping to balance the current and reduce noise.

[0040] In a specific embodiment of the present invention, the charging device 1 is, for example, a charger, which includes an AC charging pin (not shown) and a DC interface (not shown). The AC (Alternating Current) charging pin is used to connect to an external power supply interface (such as a wall socket or a jack on a power strip) to obtain AC power. The DC (Direct Current) interface is an electrical connector such as Type-C or Lightning. The DC interface is used to electrically connect to an electronic device to output a DC voltage. Preferably, the second circuit board 20 is provided with a first connection point (not shown) and a second connection point (not shown) that are electrically connected to the protection circuit 25 and the charging protocol circuit 23, respectively. The AC charging pin is electrically connected to the first connection point, and the DC interface is electrically connected to the second connection point. Through the above connection method, the AC charging pin and the DC interface can be provided on the same circuit board, thereby reducing the overall size of the charger.

[0041] In this embodiment, by placing circuits for reducing electromagnetic interference and non-rectifying and filtering functions such as transformers and charging protocol circuits on the second circuit board 20, the various components on the second circuit board 20 can cooperate with each other to reduce the volume of the second circuit board, thereby allowing the idle space of the charging device 1 to be utilized, and making the charging device 1 more portable.

[0042] In addition, it can be understood that the aforementioned embodiments are merely illustrative descriptions of the present invention. Under the premise that the technical features do not conflict, the structures do not contradict, and the purpose of the invention of the present invention is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used in combination.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A charging device (1), characterized in that: include: A first circuit board (10) is provided with a main circuit; A second circuit board (20) is provided with a secondary circuit, the secondary circuit being connected to the main circuit; Wherein, the main circuit includes: a rectifier circuit (11); and A filter circuit (12) electrically connected to the rectifier circuit (11); Wherein, the secondary circuit includes: A voltage conversion circuit (22) electrically connected to the rectifier circuit (11); A drive circuit (21) electrically connected to the voltage conversion circuit (22); a charging protocol circuit (23), electrically connected to the voltage conversion circuit (22) and the filter circuit (12); The first circuit board (10) is provided with a protruding portion (101), and the second circuit board (20) is provided with a slot portion (201) corresponding to the protruding portion (101), and the protruding portion (101) is inserted into the slot portion (201).

2. The charging device (1) according to claim 1, characterized in that The first circuit board (10) and the second circuit board (20) are arranged vertically.

3. The charging device (1) according to claim 2, characterized in that The slot portion (201) is arranged close to the edge of the second circuit board (20); and / or the protruding portion (101) is arranged at the edge of the first circuit board (10) and extends and protrudes toward the second circuit board (20).

4. The charging device (1) according to claim 1, characterized in that The rectifier circuit (11) comprises a primary rectifier circuit (111) and a secondary rectifier circuit (112); the primary rectifier circuit (111) and the secondary rectifier circuit (112) are arranged on the first circuit board (10) at intervals; the primary rectifier circuit (111) is electrically connected to the filter circuit (12); and the secondary rectifier circuit (112) is electrically connected to the filter circuit (12) and the transformer circuit (22), respectively.

5. The charging device (1) according to claim 4, characterized in that The filter circuit (12) comprises a primary filter circuit (121) and a secondary filter circuit (122); the primary filter circuit (121) is electrically connected to the primary rectifier circuit (111) and the drive circuit (21); and the secondary filter circuit (122) is electrically connected to the secondary rectifier circuit (112) and the charging protocol circuit (23).

6. The charging device (1) according to claim 5, characterized in that The secondary circuit further includes: a protection circuit (25) and an anti-electromagnetic interference circuit (24); the anti-electromagnetic interference circuit (24) is electrically connected to the primary rectifier circuit (111); and the protection circuit (25) is electrically connected to the anti-electromagnetic interference circuit (24).

7. The charging device (1) according to claim 6, characterized in that The secondary circuit further includes: a first capacitor (26) electrically connecting the protection circuit (25) and the anti-electromagnetic interference circuit (24); The second capacitor (27) is electrically connected to the charging protocol circuit (23) and the voltage conversion circuit (22).

8. The charging device (1) according to claim 6, characterized in that The charging device (1) further comprises an AC charging pin and a DC interface. The second circuit board (20) is provided with a first connection point and a second connection point electrically connected to the protection circuit (25) and the charging protocol circuit (23), respectively. The AC charging pin is electrically connected to the first connection point, and the DC interface is electrically connected to the second connection point.

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