High-voltage protection circuit and charger
By setting up primary and secondary discharge structures on the circuit board and applying high voltages at both ends, the problem of the charger with leaked insulating parts cannot be intercepted, and efficient intercepting of defective products is achieved and the product safety and reliability is improved.
Patent Information
- Application Number
- CN202421087110.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-17
AI Technical Summary
In the prior art, chargers with missing insulating parts cannot be intercepted, resulting in poor products entering the market and causing product safety incidents.
Design a high-voltage protection circuit, including slots on the circuit board, primary discharge structure and secondary discharge structure. High voltage is applied at both ends of the primary and secondary discharge structures. When the insulator is inserted, the primary and secondary discharge structures are discharged due to insufficient safety distance, resulting in the failure of the high-voltage test, thereby intercepting the defective products.
Effectively intercept bad safety products, avoid bad products from entering the market, and improve the reliability of product work safety and regulations in the market.
Smart Images
Figure CN222563514U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of power supply design, and more specifically, to a high voltage protection circuit and a charger. Background Art
[0002] Miniaturized power supply design (such as charger) has a small ID design, high charging power density, and compact power board design space. Therefore, in order to meet the safety distance between the primary and secondary circuits, a groove is opened between the primary and secondary circuits and an insulating component is inserted for safety isolation.
[0003] In actual factory manufacturing, it is easy for insulating parts to be missing. Chargers with missing insulating parts cannot be intercepted, and defective products will flow into the market, causing product safety incidents. Utility Model Content
[0004] The purpose of the embodiments of the present application is to provide a high-voltage protection circuit and a charger to solve the technical problem in the prior art that a charger with a missing insulating member cannot be intercepted.
[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a high-voltage protection circuit, including a circuit board, wherein a slot is provided on the circuit board, and the slot is used to place an insulating member; the high-voltage protection circuit also includes:
[0006] a primary discharge structure, the primary discharge structure being located at one side of the slot; and
[0007] A secondary discharge structure is located at the other side of the slot and is arranged opposite to the primary discharge structure.
[0008] Optionally, the primary discharge structure includes a primary circuit and a primary discharge member, one end of the primary discharge member is connected to the primary circuit, and the other end of the primary discharge member points to an edge of one side of the slot.
[0009] In the present application, by providing a primary discharge member and directing the end of the primary discharge member toward the edge of one side of the slot, when an insulating member is missing, it is beneficial to discharge the primary discharge member and the secondary discharge structure through high voltage testing.
[0010] Optionally, the secondary discharge structure includes a secondary circuit and a secondary discharge member, one end of the secondary discharge member is connected to the secondary circuit, and the other end of the secondary discharge member points to the edge of the other side of the slot and is arranged opposite to the primary discharge member.
[0011] In the present application, a secondary discharge component is provided, and the end of the secondary discharge component is directed toward the edge of one side of the slot and is arranged opposite to the primary discharge component; when the insulating component is missing, it is beneficial to perform a high voltage test so that the secondary discharge component and the primary discharge component discharge.
[0012] Optionally, the primary discharge element is connected to an AC input terminal of the primary circuit, and the secondary discharge element is connected to a DC output terminal of the secondary circuit.
[0013] In the present application, the primary discharge element is connected to the AC input end of the primary circuit, and the secondary discharge element is connected to the DC output end of the secondary circuit, which can meet the discharge requirements of the high-voltage test while improving the safety of the high-voltage test.
[0014] Optionally, the primary discharge member is a metal discharge needle.
[0015] In the present application, the primary discharge component adopts a metal discharge needle, that is, the primary discharge component adopts a needle-shaped structure, which is more conducive to discharge when performing high-voltage testing.
[0016] Optionally, the secondary discharge member is a metal discharge needle.
[0017] In the present application, the secondary discharge member adopts a metal discharge needle, that is, the secondary discharge member adopts a needle-shaped structure, which is more conducive to discharge when performing high-voltage testing.
[0018] Optionally, the metal discharge needle is a bare conductive metal.
[0019] In the present application, the metal discharge needle adopts bare conductive metal, and the metal discharge needle can be easily discharged at high voltage during high voltage testing.
[0020] Optionally, the conductive metal is copper, gold or silver.
[0021] In the present application, the conductive metal is copper, gold or silver, which can have better conductivity and thus improve the accuracy of high voltage testing.
[0022] Optionally, the width of the slot is 1 mm-1.3 mm.
[0023] In the present application, the width of the slot is set between 1 mm and 1.3 mm, which can meet the requirements of the electrical safety distance between the primary discharge structure and the secondary discharge structure.
[0024] The present application also provides a charger, comprising:
[0025] shell;
[0026] The above-mentioned high-voltage protection circuit; the high-voltage protection circuit is arranged in the housing; and
[0027] A plug, one end of which passes through the shell and is connected to the circuit board.
[0028] The beneficial effects of the high-voltage protection circuit and charger provided in the present application are as follows: compared with the prior art, in the present application, a primary discharge structure and a secondary discharge structure are arranged on the circuit board, and high voltage is applied to both ends of the primary discharge structure and the secondary discharge structure. When the insulating part is missing, the primary discharge structure and the secondary discharge structure will discharge due to insufficient safety distance, causing the high-voltage test to fail, thereby effectively intercepting safety defective products, preventing defective products from entering the market, and improving the safety reliability of the product in the market. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0030] Figure 1 A schematic diagram of the structure of a high voltage protection circuit provided in an embodiment of the present application;
[0031] Figure 2 A schematic diagram of the three-dimensional structure of a circuit board in a high-voltage protection circuit provided in an embodiment of the present application;
[0032] Figure 3 A schematic diagram of the three-dimensional structure of an insulating component in a high-voltage protection circuit provided in an embodiment of the present application;
[0033] Figure 4 A schematic diagram of the three-dimensional structure of a charger provided in an embodiment of the present application;
[0034] Figure 5 A schematic diagram of the three-dimensional structure of a charger (excluding the housing) provided in an embodiment of the present application;
[0035] Figure 6 A schematic diagram of a three-dimensional structure of a charger housing provided in an embodiment of the present application Figure 1 ;
[0036] Figure 7 A schematic diagram of a three-dimensional structure of a charger housing provided in an embodiment of the present application Figure 2 .
[0037] Among them, the reference numerals in the figure are:
[0038] 100-circuit board;
[0039] 101 - slot;
[0040] 200-insulation parts;
[0041] 201-insulating sheet;
[0042] 202-insulating seat;
[0043] 300-primary discharge structure;
[0044] 301-primary circuit;
[0045] 302 primary discharge parts;
[0046] 400-Secondary discharge structure;
[0047] 401-Secondary circuit;
[0048] 402 secondary discharge components;
[0049] 500-housing;
[0050] 501-housing;
[0051] 511-opening;
[0052] 512-avoidance exit;
[0053] 513-groove;
[0054] 502-cover body;
[0055] 600-plug. DETAILED DESCRIPTION
[0056] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0057] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0058] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0060] Please also read Figures 1 to 3 Now, the high voltage protection circuit provided by the embodiment of the present application is described. The high voltage protection circuit includes a circuit board 100, such as Figure 1 and Figure 2 As shown, a slot 101 is provided on the circuit board 100, and the slot 101 is used to place the insulating member 200; the high-voltage protection circuit also includes a primary discharge structure 300 and a secondary discharge structure 400 arranged on the circuit board 100; the primary discharge structure 300 is located on one side of the slot 101; the secondary discharge structure 400 is located on the other side of the slot 101 and is arranged opposite to the primary discharge structure 300.
[0061] Compared with the prior art, the high-voltage protection circuit provided in the embodiment of the present application, in the embodiment of the present application, by setting a primary discharge structure 300 and a secondary discharge structure 400 on the circuit board 100, high voltage is applied to both ends of the primary discharge structure 300 and the secondary discharge structure 400. When the insulating member 200 is not inserted, the primary discharge structure 300 and the secondary discharge structure 400 will discharge due to insufficient safety distance, causing the high-voltage test to fail, thereby effectively intercepting safety defective products, preventing defective products from entering the market, and improving the safety reliability of the product in the market.
[0062] In one embodiment of the present application, see Figure 3 The insulating member 200 may include an insulating sheet 201 and an insulating seat 202, which are integrally formed; the insulating seat 202 is disposed at one end of the insulating sheet 201, the cross-sectional shape of the insulating sheet 201 matches the shape of the slot 101, the other end of the insulating sheet 201 is inserted into the slot 101, and the insulating seat 202 abuts against the circuit board 100. By providing the insulating seat 202, this embodiment can position the insulating member 200 for installation, and prevent the insulating sheet 201 from slipping out of the slot 101.
[0063] In one embodiment of the present application, see Figure 1 The primary discharge structure 300 includes a primary circuit 301 and a primary discharge member 302 , one end of the primary discharge member 302 is connected to the primary circuit 301 , and the other end of the primary discharge member 302 points to the edge of one side of the slot 101 .
[0064] In this embodiment, by providing the primary discharge member 302 and directing the end of the primary discharge member 302 toward the edge of one side of the slot 101, when the insulating member 200 is missing, it is beneficial to discharge the primary discharge member 302 and the secondary discharge structure 400 through high voltage testing.
[0065] In one embodiment of the present application, see Figure 1 The secondary discharge structure 400 may include a secondary circuit 401 and a secondary discharge member 402 , one end of the secondary discharge member 402 is connected to the secondary circuit 401 , the other end of the secondary discharge member 402 points to the edge of the other side of the slot 101 , and is arranged opposite to the primary discharge member 302 .
[0066] In this embodiment, a secondary discharge member 402 is provided, and the end of the secondary discharge member 402 is directed toward the edge of one side of the slot 101 and is arranged opposite to the primary discharge member 302; when the insulating member 200 is missing, it is beneficial to perform a high voltage test so that the secondary discharge member 402 and the primary discharge member 302 discharge.
[0067] In one embodiment of the present application, the primary discharge element 302 is connected to the AC input end of the primary circuit 301 , and the secondary discharge element 402 is connected to the DC output end of the secondary circuit 401 .
[0068] In this embodiment, the primary discharge element 302 is connected to the AC input end of the primary circuit 301, and the secondary discharge element 402 is connected to the DC output end of the secondary circuit 401, which can meet the discharge requirements of the high-voltage test while improving the safety of the high-voltage test.
[0069] In one embodiment of the present application, the primary discharge member 302 is a metal discharge needle.
[0070] In this embodiment, the primary discharge member 302 is a metal discharge needle, that is, the primary discharge member 302 has a needle-shaped structure, which is more conducive to discharge when performing a high-voltage test.
[0071] It can be understood that the needle tip of the primary discharge member 302 points to the edge of one side of the slot 101. The primary discharge member 302 can be disposed on the circuit board 100 by printing.
[0072] In one embodiment of the present application, the secondary discharge member 402 is a metal discharge needle.
[0073] In this embodiment, the secondary discharge element 402 is a metal discharge needle, that is, the secondary discharge element 402 has a needle-shaped structure, which is more conducive to discharge when performing a high-voltage test.
[0074] It is understandable that the needle tip of the secondary discharge member 402 points to the edge of the other side of the slot 101, and the needle tip of the secondary discharge member 402 is arranged opposite to the needle tip of the primary discharge member 302. The secondary discharge member 402 can be arranged on the circuit board 100 by printing.
[0075] In one embodiment of the present application, the metal discharge needle is a bare conductive metal.
[0076] In this embodiment, the metal discharge needle is made of bare conductive metal, which can easily make the metal discharge needle discharge at high voltage during high voltage testing.
[0077] It is understandable that the circuit board 100 (PCB board) is generally electrified by copper foil, gold plating, or silver plating. If the metal discharge needle is not a bare conductive metal, it is not easy to perform high-voltage test discharge.
[0078] In one embodiment of the present application, the conductive metal is copper, gold or silver.
[0079] In this embodiment, the conductive metal is copper, gold or silver, which can have better conductivity and thus improve the accuracy of high voltage testing.
[0080] In one embodiment of the present application, the width of the slot 101 is 1 mm-1.3 mm.
[0081] In this embodiment, the width of the slot 101 is set between 1 mm and 1.3 mm, which can meet the requirements of the electrical safety distance between the primary discharge structure 300 and the secondary discharge structure 400 .
[0082] The working principle of the high-voltage protection circuit provided in the embodiment of the present application is as follows: If the insulating component 200 is not inserted in the slot 101 of the circuit board 100 during the production process, it can be effectively intercepted through functional testing (high-voltage testing) to screen out safety-compliant defective products and prevent defective products from entering the market. Specifically, because 3000Vac high voltage is applied to both ends of the primary discharge structure 300 and the secondary discharge structure 400, which is equivalent to 3000Vac high voltage at the position of the slot 101, the primary discharge component 302 and the secondary discharge component 402 will discharge due to insufficient safety distance, thereby causing a high-voltage test failure, and safety-compliant defective products with missing insulating components 200 will be intercepted in time in this process flow.
[0083] This application also provides a charger, please refer to Figure 4 and Figure 5 The charger includes a housing 500 , a plug 600 and the above-mentioned high-voltage protection circuit; the high-voltage protection circuit is arranged in the housing 500 ; one end of the plug 600 passes through the housing 500 and is connected to the circuit board 100 .
[0084] In one embodiment of the present application, please refer to Figure 5 and Figure 6 The housing 500 includes a shell 501 and a cover 502. The shell 501 has a receiving cavity, and the high-voltage protection circuit is arranged in the receiving cavity; one end of the shell 501 has an opening 511, and the cover 502 is detachably connected to the shell 501 at the opening 511; please refer to Figure 7 An escape opening 512 is provided at one end of the housing 501 facing away from the opening 511 , and one end of the plug 600 passes through the escape opening 512 and is connected to the circuit board 100 in the accommodating cavity.
[0085] In one embodiment of the present application, please refer to Figure 6 and Figure 7 A groove 513 is provided on the surface of the housing 501, and the bottom surface of the groove 513 is arc-shaped, so that the user's finger can be placed on the groove 513 to facilitate the plugging and unplugging of the charger.
[0086] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A high voltage protection circuit, comprising a circuit board, wherein the circuit board is provided with a slot for placing an insulating member; characterized in that: The high voltage protection circuit further includes: a primary discharge structure, the primary discharge structure being located at one side of the slot; and A secondary discharge structure is located at the other side of the slot and is arranged opposite to the primary discharge structure.
2. The high voltage protection circuit according to claim 1, characterized in that: The primary discharge structure comprises a primary circuit and a primary discharge member, one end of the primary discharge member is connected to the primary circuit, and the other end of the primary discharge member points to an edge of one side of the slot.
3. The high voltage protection circuit according to claim 2, characterized in that: The secondary discharge structure includes a secondary circuit and a secondary discharge member, one end of the secondary discharge member is connected to the secondary circuit, the other end of the secondary discharge member points to the edge of the other side of the slot and is arranged opposite to the primary discharge member.
4. The high voltage protection circuit according to claim 3, characterized in that: The primary discharge element is connected to an AC input terminal of the primary circuit, and the secondary discharge element is connected to a DC output terminal of the secondary circuit.
5. The high voltage protection circuit according to claim 2, characterized in that: The primary discharge member is a metal discharge needle.
6. The high voltage protection circuit according to claim 3, characterized in that: The secondary discharge member is a metal discharge needle.
7. The high voltage protection circuit according to claim 5 or 6, characterized in that: The metal discharge needle is a bare conductive metal.
8. The high voltage protection circuit according to claim 7, characterized in that: The conductive metal is copper, gold or silver.
9. The high voltage protection circuit according to claim 1, characterized in that: The width of the slot is 1 mm-1.3 mm.
10. A charger, characterized in that: include: shell; The high voltage protection circuit according to any one of claims 1 to 9; The high voltage protection circuit is arranged in the housing; as well as A plug, one end of which passes through the shell and is connected to the circuit board.