Residual-current circuit breaker with circuit board protection shielding structure

Abstract

The utility model discloses a residual-current circuit breaker with a circuit board protection shielding structure. The problem that an existing circuit board is prone to failure is solved. The device comprises a shell, the contact system is arranged in the shell and used for connecting or disconnecting a circuit in the shell; the mutual inductor is arranged in the shell and is used for allowing a wire to pass through to detect leakage current; the release is arranged in the shell and is used for breaking the contact system; the circuit board is arranged in the shell, and the mutual inductor and the release are respectively and electrically connected with the circuit board; and the protection shielding assembly sleeves the circuit board and is used for protecting the circuit board. The beneficial effects of the utility model are that the protection shielding assembly is added to protect the circuit board, so that the product performance is stable and the service life is long. The utility model also has the advantages of simple structure, convenience in assembly, reliable action, long service life and the like.

Description

Technical Field

[0001] The utility model relates to a leakage circuit breaker, in particular to a leakage circuit breaker with a circuit board protection shielding structure. Background Art

[0002] The leakage protector, also known as the leakage switch or leakage circuit breaker, is mainly used to protect against electric shock when leakage occurs in the equipment and is fatal. It has overload and short-circuit protection functions, and can be used to protect the overload and short circuit of the line or motor. It can also be used for the infrequent switching and starting of the line under normal circumstances. The existing leakage circuit breaker usually includes a contact system, a transformer, a circuit board and a release. The contact system usually includes a static contact and a moving contact. The transformer and the release are both connected to the circuit board. The transformer detects the leakage signal and transmits it to the circuit board. The circuit board controls the release to separate the moving contact from the static contact to play the role of leakage protection. However, in actual use, due to the lack of protection of the electronic circuit board and electromagnetic compatibility, the design of the core components such as the electronic circuit board assembly, the zero-sequence transformer, etc. is invalid or insufficient. Electromagnetic compatibility, the design of the core components such as the electronic circuit board assembly, the zero-sequence transformer, etc. is prone to failure or insufficiency, which shortens the product life and greatly increases the unqualified rate. Utility Model Content

[0003] In order to solve the problem that the existing circuit boards in the background technology are prone to failure, the utility model provides a leakage circuit breaker with a circuit board protection shielding structure.

[0004] The technical solution of the utility model is: a leakage circuit breaker with a circuit board protection shielding structure, comprising a housing, and also comprising:

[0005] A contact system, arranged in the housing, for connecting or disconnecting the circuit in the housing;

[0006] A mutual inductor, arranged in the housing, for allowing the conductor to pass through to detect leakage current;

[0007] A release device is arranged in the housing and is used to disconnect the contact system;

[0008] A circuit board is arranged in the housing, and the mutual inductor and the release are electrically connected to the circuit board respectively;

[0009] The protective shielding component is sleeved outside the circuit board to protect the circuit board.

[0010] As a further improvement of the utility model, the protective shielding assembly includes a first protective cover and a second protective cover, the second protective cover is sleeved outside the first protective cover, and the first protective cover is wrapped outside the circuit board.

[0011] As a further improvement of the utility model, the first protective cover is a plastic protective cover.

[0012] As a further improvement of the present invention, the second protective cover is a metal protective cover for improving electromagnetic compatibility.

[0013] As a further improvement of the present invention, the first protective cover comprises a first protective shell and a first cover, and the first cover is slidably matched with the first protective shell.

[0014] As a further improvement of the present invention, the first protective shell is provided with a guide slot, and the first cover is inserted into the guide slot to slide and cooperate with the first protective shell.

[0015] As a further improvement of the present invention, the second protective cover comprises a second protective shell and a second cover, the second protective shell is sleeved outside the first protective shell, and the second cover is arranged above the first cover.

[0016] As a further improvement of the present invention, the second cover is inserted into the guide slot and slidably cooperates with the first protective shell, and the first protective shell is bent toward the guide slot to form a limiting edge.

[0017] As a further improvement of the utility model, the first protective shell is provided with a first cavity and a second cavity, the first cavity and the second cavity cooperate with each other to form an inverted "L" shape, and the protective shielding assembly is provided with a wiring hole for facilitating power supply.

[0018] As a further improvement of the utility model, it also includes:

[0019] The wiring terminal is arranged in the housing and connected to the contact system through a wire;

[0020] An isolation plate, provided between the wiring terminal and the protective shielding assembly;

[0021] The wires are passed around the bottom of the isolation plate and through the transformer to be connected with the contact system.

[0022] The beneficial effect of the utility model is that a protective shielding component is added to protect the circuit board, so that the product performance is stable and the service life is long. The utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0024] Attached Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0025] Attached Figure 3 It is a schematic diagram of the explosion structure of the protective shielding component of an embodiment of the utility model.

[0026] Attached Figure 4 For attachment Figure 3 Schematic diagram of the structure of the first protective shell.

[0027] In the figure, 1, shell; 2, contact system; 3, mutual inductor; 4, wire; 5, release; 6, circuit board; 7, protective shielding assembly; 71, first protective cover; 711, first protective shell; 712, first cover; 713, guide slide; 714, limit edge; 715, first cavity; 716, second cavity; 72, second protective cover; 721, second protective shell; 722, second cover; 73, wiring hole; 8, wiring terminal; 9, isolation plate. DETAILED DESCRIPTION

[0028] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0029] Depend on Figure 1 Combination Figure 2-4 As shown, a leakage circuit breaker with a circuit board protection shielding structure includes a housing 1 and also includes:

[0030] The contact system 2 is arranged in the housing 1 and is used to connect or disconnect the circuit in the housing 1;

[0031] A mutual inductor 3 is arranged in the housing 1 and is used for the conductor 4 to pass through and detect leakage current;

[0032] A release 5 is arranged in the housing 1 and is used to disconnect the contact system 2;

[0033] The circuit board 6 is arranged in the housing 1, and the mutual inductor 3 and the release 5 are electrically connected to the circuit board 6 respectively;

[0034] The protective shielding component 7 is sleeved outside the circuit board 6 to protect the circuit board 6. The beneficial effect of the utility model is that the protective shielding component is added to protect the circuit board, so that the product performance is stable and the service life is long. The utility model also has the advantages of simple structure, convenient assembly, reliable operation, long service life, etc.

[0035] The protective shielding assembly 7 includes a first protective cover 71 and a second protective cover 72. The second protective cover 72 is sleeved on the outside of the first protective cover 71, and the first protective cover 71 is wrapped around the outside of the circuit board 6. Specifically, the first protective cover 71 is a plastic protective cover. More specifically, the second protective cover 72 is a metal protective cover for improving electromagnetic compatibility. The plastic protective cover can provide three protections for customer electronic components, namely, mainly moisture-proof design, salt spray-proof design, and mildew-proof design. An EMC anti-electromagnetic compatibility metal shell is added to the original protective shell. Through the product surge and pulse group test, the product functions normally and reliably, and there will be no customer feedback that the leakage protection value is inaccurate or drifting, or even failure.

[0036] The first protective cover 71 includes a first protective shell 711 and a first cover 712, and the first cover 712 is slidably matched with the first protective shell 711. Specifically, the first protective shell 711 is provided with a guide slot 713, and the first cover 712 is inserted into the guide slot 713 and slidably matched with the first protective shell 711. In this way, it is convenient to quickly open the first protective shell, the structure is simple, the protection is reliable, and it is convenient to put the circuit board in.

[0037] The second protective cover 72 includes a second protective shell 721 and a second cover 722. The second protective shell 721 is sleeved outside the first protective shell 711, and the second cover 722 is arranged above the first cover 712. Such a structure is convenient for opening and closing the first cover, and is convenient for protecting the circuit board from above. Specifically, the circuit board is wrapped in the first protective cover, the first protective shell made of plastic material avoids the circuit, and has a good three-proof effect. The second protective cover is sleeved outside the first protective cover to improve electromagnetic compatibility.

[0038] The second cover 722 is inserted into the guide slot 713 and slides with the first protective shell 711, and the first protective shell 711 is bent upward toward the guide slot 713 to form a limiting edge 714. This structure is convenient for product installation and fixing, simple in structure, and easy to disassemble and repair.

[0039] The first protective shell 711 is provided with a first cavity 715 and a second cavity 716, which cooperate with each other to form an inverted "L" shape, and the protective shielding assembly 7 is provided with a wiring hole 73 for facilitating power supply. In this way, the electronic components of the circuit board can be arranged in the second cavity, and the board body can be inserted into the first cavity, so as to reasonably utilize the space in the cavity.

[0040] The utility model also includes:

[0041] The connection terminal 8 is arranged in the housing 1 and connected to the contact system 2 through the wire 4;

[0042] An isolation plate 9 is provided between the wiring terminal 8 and the protective shielding assembly 7;

[0043] The wire 4 passes through the bottom of the isolation plate 9 and passes through the transformer 3 to connect with the contact system 2. The isolation plate separates the wiring terminal and the protective shielding component, avoids the close contact between the second protective shell made of metal and the wiring terminal, and increases the creepage distance, which is safer.

[0044] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0046] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of the utility model patent right.

Claims

1. A leakage circuit breaker with a circuit board protection shielding structure, comprising a housing (1), characterized in that Also included: A contact system (2) is disposed in the housing (1) and is used to connect or disconnect the circuit in the housing (1); A mutual inductor (3) is arranged in the housing (1) and is used for allowing the conductor (4) to pass through to detect leakage current; A release (5) is arranged in the housing (1) and is used to disconnect the contact system (2); A circuit board (6) is arranged in the housing (1), and the mutual inductor (3) and the release (5) are electrically connected to the circuit board (6) respectively; A protective shielding component (7) is sleeved outside the circuit board (6) and is used to protect the circuit board (6).

2. A leakage circuit breaker with a circuit board protection shielding structure according to claim 1, characterized in that The protective shielding assembly (7) comprises a first protective cover (71) and a second protective cover (72), wherein the second protective cover (72) is sleeved outside the first protective cover (71), and the first protective cover (71) is wrapped around the circuit board (6).

3. A leakage circuit breaker with a circuit board protection shielding structure according to claim 2, characterized in that The first protective cover (71) is a plastic protective cover.

4. A leakage circuit breaker with a circuit board protection shielding structure according to claim 2, characterized in that The second protective cover (72) is a metal protective cover and is used to improve electromagnetic compatibility.

5. The leakage circuit breaker with circuit board protection shielding structure according to claim 2, characterized in that The first protective cover (71) comprises a first protective shell (711) and a first cover (712), and the first cover (712) is slidably matched with the first protective shell (711).

6. A leakage circuit breaker with a circuit board protection shielding structure according to claim 5, characterized in that The first protective shell (711) is provided with a guide slot (713), and the first cover (712) is inserted into the guide slot (713) to slide and cooperate with the first protective shell (711).

7. A leakage circuit breaker with a circuit board protection shielding structure according to claim 6, characterized in that The second protective cover (72) comprises a second protective shell (721) and a second cover (722); the second protective shell (721) is sleeved outside the first protective shell (711), and the second cover (722) is arranged above the first cover (712).

8. The leakage circuit breaker with circuit board protection shielding structure according to claim 7, characterized in that The second cover (722) is inserted into the guide slot (713) and slidably cooperates with the first protective shell (711), and the first protective shell (711) is bent upward toward the guide slot (713) to form a limiting edge (714).

9. The leakage circuit breaker with a circuit board protection shielding structure according to claim 5, characterized in that The first protective shell (711) is provided with a first cavity (715) and a second cavity (716), the first cavity (715) and the second cavity (716) cooperate with each other to form an inverted "L" shape, and the protective shielding assembly (7) is provided with a wiring hole (73) for facilitating power supply.

10. The leakage circuit breaker with a circuit board protection shielding structure according to claim 1, characterized in that Also includes: A wiring terminal (8) is disposed in the housing (1) and is connected to the contact system (2) via a wire (4); An isolation plate (9) is provided between the wiring terminal (8) and the protective shielding assembly (7); The wire (4) passes around the bottom of the isolation plate (9) and passes through the transformer (3) to be connected to the contact system (2).

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