Circuit board mounting structure of switching device and molded case circuit breaker

Abstract

The utility model discloses a circuit board mounting structure of a switching device and a molded case circuit breaker. The problem that a circuit board of an existing switching device is exposed and is easy to damage is mainly solved. The switch is characterized by also comprising a sub-shell (3) which is detachably connected with the switch shell and is internally provided with a cavity (31) for installing a circuit board. According to the circuit board mounting structure of the switching device and the molded case circuit breaker provided by the utility model, the circuit board is mounted in the sub-shell to form a small modular design, so that the circuit board mounting structure is convenient to mount and dismount, the circuit board is isolated from the external environment, dust, moisture, corrosive substances and the like are effectively blocked, electric shock of personnel is prevented, and the risk of electrical accidents is reduced.

Description

Technical Field

[0001] The utility model relates to the field of switch electrical appliances, in particular to a circuit board mounting structure of the switch electrical appliances and a molded case circuit breaker. Background Art

[0002] As a core component, the circuit board plays a vital role in the circuit breaker. It needs to perform signal processing and control, protection functions, and detect the working status of the circuit breaker. When the product breaks the fault current, the harmful arc, impact airflow, fine particles and other undesirable phenomena it generates will seriously damage the outer surface of the circuit board, causing the performance of the circuit board to decline, or even damage the circuit board, making it unable to work normally, resulting in the loss of leakage detection function.

[0003] As shown in the Chinese patent with authorization announcement number CN 219042099 U, the circuit boards used in existing products are exposed, which can easily cause safety hazards in a humid environment or an environment with conductive dust. If the circuit board is damaged, the entire device needs to be replaced during maintenance, and the circuit board cannot be removed while it is energized. The power needs to be turned off for operation, which is not easy to disassemble. The circuit board of a conventional circuit breaker is directly installed in the circuit breaker. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model provides a circuit board installation structure of a switch electrical appliance and a molded case circuit breaker, which mainly solves the problem that the circuit board of the existing switch electrical appliance is exposed and easily damaged.

[0005] The technical solution of the utility model is:

[0006] The circuit board installation structure of the switch electrical appliance includes a switch housing and a circuit board, and also includes

[0007] The sub-housing is detachably connected to the switch housing and has a cavity inside for installing a circuit board.

[0008] The sub-housing includes a first housing and a second housing that are detachably connected.

[0009] The first shell is provided with a plurality of hooks, and the second shell is provided with a clamping groove matched with the hooks.

[0010] The sub-housing is provided with a through slot, the circuit board is provided with a socket, and part of the socket extends out of the through slot for plugging with the motherboard in the switch housing.

[0011] A mounting seat is arranged in the sub-shell, part of the through slot is arranged in the mounting seat, and the circuit board is arranged on the upper end surface of the mounting seat.

[0012] The second housing further is provided with screw mounting posts, and further includes screws connected to the screw mounting posts, and the screws are used to mount the first housing and the second housing together.

[0013] The outer wall of the sub-housing is provided with a connecting plate, and the connecting plate is connected to the switch housing through fasteners.

[0014] The switch housing is provided with a counterbore, and the bottom of the sub-housing is provided with a boss adapted to the counterbore.

[0015] A molded case circuit breaker includes a circuit board mounting structure of a switching device as described above.

[0016] The beneficial effects of the present utility model are as follows: The present utility model provides a circuit board mounting structure of a switching device and a molded case circuit breaker. The circuit board is installed in the sub-housing, forming a small modular design, which is convenient for installation and removal, isolates the circuit board from the external environment, effectively blocks dust, moisture, corrosive substances, etc., and prevents electric shock to personnel, reducing the risk of electrical accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of a sub-housing according to an embodiment of the present utility model.

[0018] Figure 2 is an exploded schematic diagram of a sub-housing according to an embodiment of the present utility model.

[0019] Figure 3 is a three-dimensional schematic diagram of a first housing according to an embodiment of the present utility model.

[0020] Figure 4 is a three-dimensional schematic diagram of a second housing according to an embodiment of the present utility model.

[0021] Figure 5 is an exploded schematic diagram of an installation on a molded case circuit breaker according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the present utility model with reference to the drawings: As shown in the figure, a circuit board mounting structure of a switching device includes a switch housing 1 and a circuit board 2, and further includes a sub-housing 3, which is detachably connected to the switch housing and internally provided with a cavity 31 for circuit board installation. During installation, first install the circuit board into the sub-housing, and then install the sub-housing as a whole onto the switch housing. The circuit board can be connected to the mother circuit board on the switch housing through wires or through sockets. Corresponding through slots can be opened on the sub-housing, which can be transformer interfaces, power interfaces, etc.; in addition, the micro switch 25 on the circuit board can also be exposed through the through slot without affecting its operation.

[0023] In this embodiment, as shown in the figure, the sub-housing includes a first housing 4 and a second housing 5 that are detachably connected. The first housing and the second housing can be installed by screws, or can be installed by means of a hook and a slot, or both can be used.

[0024] In this embodiment, as shown in the figure, a plurality of hooks 41 are provided on the first housing, and slots 51 that cooperate with the hooks are provided on the second housing. With this structure for installation, the structure is relatively simple and it can be installed in place by pressing.

[0025] In this embodiment, as shown in the figure, a through groove 32 is provided on the sub-housing, and sockets 21 are provided on the circuit board. Some of the sockets extend out of the through groove for plugging into the motherboard in the switch housing. When the socket passes through the through groove, it can also play a role in limiting and has a certain fixing effect on the circuit board itself.

[0026] In this embodiment, as shown in the figure, a mounting seat 33 is provided inside the sub-housing, part of the through groove is provided in the mounting seat, and the circuit board is provided on the upper end surface of the mounting seat.

[0027] In this embodiment, as shown in the figure, screw mounting posts 52 are further provided inside the second housing, and screws connected to the screw mounting posts are further included. The screws are used to mount the first housing and the second housing together. The screws mount the first housing and the second housing together. Part of the circuit board can also be placed on the mounting posts, and through holes are provided on the circuit board for the screws to pass through.

[0028] In this embodiment, as shown in the figure, a connecting plate 34 is provided on the outer wall of the sub-housing, and the connecting plate is connected to the switch housing through a fastener. The connecting plate can be installed on the switch housing by screws, and screw mounting holes are provided on the switch housing.

[0029] In this embodiment, as shown in the figure, a counterbore 11 is provided on the switch housing, and a boss 35 adapted to the counterbore is provided at the bottom of the sub-housing. It plays a role in positioning, and an interface for the bus bar can be provided in the counterbore for docking.

[0030] In this embodiment, as shown in the figure, the plastic case circuit breaker includes the circuit board mounting structure of the switch electrical appliance as described above.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0033] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model. The embodiments should not be regarded as a limitation to the present utility model, but any improvement made based on the spirit of the present utility model should be within the protection scope of the present utility model.

Claims

1. Circuit board mounting structure of a switching electrical appliance, comprising a switch housing (1) and a circuit board (2), characterized in that: Further comprising a sub-housing (3), detachably connected to the switch housing, and internally provided with a cavity (31) for mounting a circuit board; a through groove (32) is provided on the sub-housing, a socket (21) is provided on the circuit board, and part of the socket extends out of the through groove for plugging into a motherboard in the switch housing; a mounting seat (33) is provided in the sub-housing, part of the through groove is provided in the mounting seat, and the circuit board is provided on the upper end surface of the mounting seat.

2. The circuit board mounting structure of the switching electrical apparatus according to claim 1, wherein: The sub-housing includes a first housing (4) and a second housing (5) that are detachably connected.

3. The circuit board mounting structure of the switching electrical apparatus according to claim 2, wherein: A plurality of hooks (41) are provided on the first housing, and clamping grooves (51) that cooperate with the hooks are provided on the second housing.

4. The circuit board mounting structure of the switching electrical appliance according to claim 2, characterized in that: A screw mounting post (52) is further provided in the second housing, and further includes a screw connected to the screw mounting post, and the screw is used to mount the first housing and the second housing together.

5. The circuit board mounting structure of the switching electrical appliance according to claim 1, characterized in that: A connecting plate (34) is provided on the outer wall of the sub-housing, and the connecting plate is connected to the switch housing through a fastener.

6. The circuit board mounting structure of the switching electrical appliance according to any one of claims 1-5, characterized in that: A counterbore (11) is provided on the switch housing, and a boss (35) adapted to the counterbore is provided at the bottom of the sub-housing.

7. Molded case circuit breaker, characterized in that, Comprising a circuit board mounting structure of a switching electrical appliance according to any one of claims 1-6.

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