Leakage protection device and electric appliance comprising same

Abstract

The utility model provides an electric leakage protection device, which comprises a first shell, an input assembly and an output assembly, the second shell is detachably fixed to the first shell through a connecting piece, and an accommodating cavity is formed by the second shell and the first shell; the electric leakage protection module is accommodated in the accommodating cavity and is coupled with the input assembly and the output assembly, and the electric leakage protection module comprises a switching mechanism which is arranged between the input assembly and the output assembly and is configured to control electric connection between the input assembly and the output assembly; the circuit assembly is configured to detect a leakage current signal and drive the switching mechanism to disconnect the power connection when the leakage current signal is detected; and the cover plate is fixed to the first shell and / or the second shell and covers the connecting piece. According to the leakage protection device, the influence on the performance caused by disassembly by a user can be avoided, and the safety and the convenience in use are further improved. In addition, the leakage protection device provided by the utility model is simple in structure, low in cost and high in safety.

Description

Technical Field

[0001] The utility model relates to the electrical field, in particular to a leakage protection device and an electrical appliance comprising the same. Background Art

[0002] With the advancement of technology and the improvement of people's living standards, people pay more and more attention to the safety of household appliances, and many household appliances are equipped with leakage protection devices. At present, most leakage protection devices on the market are fixed by screws, and the screw holes are exposed on the surface of the product. It is easy for users to disassemble the product by themselves, which will affect the performance of the product and even cause the product to fail, and it will not be able to protect the personal safety of users during the use of the product. In addition, the waterproof performance of this leakage protection device is also poor, and water may penetrate into the product through the screw holes, which will bring certain safety hazards and may cause danger. Utility Model Content

[0003] Based on the above problems, the first aspect of the utility model proposes a leakage protection device, comprising: a first shell, an input component and an output component; a second shell, which is detachably fixed to the first shell via a connecting piece and forms a accommodating cavity with the first shell; a leakage protection module, which is accommodated in the accommodating cavity and coupled with the input component and the output component, wherein the leakage protection module comprises: a switching mechanism, which is arranged between the input component and the output component and is configured to control the power connection between the input component and the output component; and a circuit component, which is configured to detect a leakage current signal and drive the switching mechanism to disconnect the power connection when the leakage current signal is detected; and a cover plate, which is fixed to the first shell and / or the second shell and covers the connecting piece.

[0004] In some embodiments, the cover plate is disposed on a side of the second shell away from the first shell.

[0005] In some embodiments, the cover plate is fixed to the first shell and / or the second shell via at least one of the following methods: snap fixation, welding fixation, and glue bonding fixation.

[0006] In some embodiments, an opening is provided on the first shell and / or the second shell, and a portion of the output component extends into the accommodating cavity through the opening, and the leakage protection device further includes: a wire pressing block, which is arranged in the accommodating cavity and fixed to the first shell and / or the second shell, and the wire pressing block is used to fix the portion of the output component in the accommodating cavity.

[0007] In some embodiments, the output component includes a power cord and a power cord bending buffer device sleeved on the outside of the power cord, and one end of the power cord and one end of the power cord bending buffer device extend into the accommodating cavity through the opening.

[0008] In some embodiments, a first fixing portion is provided at one end of the power cord bending buffer device, and a second fixing portion corresponding to the position of the first fixing portion is provided on the wire pressing block, which is used to cooperate with the first fixing portion to fix the one end of the power cord bending buffer device in the accommodating cavity.

[0009] In some embodiments, the first fixing portion includes a notch, and the second fixing portion includes a snap fit to match the notch.

[0010] In some embodiments, a third fixing portion is provided on a side of the first shell close to the second shell, and a fourth fixing portion corresponding to the position of the third fixing portion is provided on the wire pressing block, which is used to cooperate with the third fixing portion to fix the one end of the power cord in the accommodating cavity.

[0011] In some embodiments, the third fixing portion includes at least one first pressure rib, the fourth fixing portion includes at least one second pressure rib, and the one end of the power cord is engaged between the at least one first pressure rib and the at least one second pressure rib.

[0012] In some embodiments, the connection member comprises at least one screw, bolt and / or stud.

[0013] In some embodiments, at least one first through hole is provided on the second shell, and at least one second through hole corresponding to the position of the at least one first through hole is provided on the cover plate, and one end of the input component is connected to the leakage protection module and accommodated in the accommodating cavity, and the other end passes through the at least one first through hole and the at least one second through hole and extends to the outside of the cover plate.

[0014] In some embodiments, the input assembly includes at least one plug blade.

[0015] In some embodiments, a reset button and a test button are further provided on the first shell, the reset button is used to reset the leakage protection module, and the test button is used to test the leakage protection function of the leakage protection device.

[0016] The second aspect of the utility model provides an electrical appliance, comprising: a load device; and a leakage protection device according to each embodiment of the first aspect, which is coupled between a current-carrying line and the load device and is used to supply power to the load device.

[0017] The leakage protection device of the utility model can avoid the impact on product performance caused by user disassembly, and further improve the safety and convenience of product use. In addition, the leakage protection device provided by the utility model has a simple structure, low cost and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The embodiments are shown and explained with reference to the accompanying drawings. These drawings are used to illustrate the basic principles, and only the aspects necessary for understanding the basic principles are shown. These drawings are not to scale. In the drawings, the same reference numerals represent similar features. In addition, the connection between each box in the architecture diagram indicates that the two boxes are electrically coupled, and the absence of a connection between the two boxes does not mean that the two boxes are not coupled.

[0019] Figure 1 The overall appearance schematic diagram of the existing leakage protection device is shown;

[0020] Figure 2a-2b Shows schematic diagrams of the overall appearance of the leakage protection device in different directions according to an embodiment of the utility model;

[0021] Figure 3 The figure shows an overall assembly exploded diagram of the leakage protection device according to an embodiment of the utility model;

[0022] Figure 4a-4b Shows exploded schematic diagrams of the first housing, the output assembly and the wire pressing block at different angles according to an embodiment of the utility model;

[0023] Figure 5 The figure shows an assembly diagram of a first housing, an output assembly and a wire pressing block according to an embodiment of the utility model;

[0024] Figure 6a-6b It shows a schematic structural diagram of a wire pressing block at different angles according to an embodiment of the utility model;

[0025] Figure 7 An exploded schematic diagram of a cover plate and a second housing according to an embodiment of the utility model is shown;

[0026] Figure 8 A schematic diagram showing the structure of a cover plate according to an embodiment of the utility model is shown; and

[0027] Fig. 9 A schematic diagram of assembling the cover plate and the second shell according to an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0028] In the following specific description of the preferred embodiments, reference will be made to the attached drawings that constitute a part of the present invention. The attached drawings show, by way of example, specific embodiments that can implement the present invention. The illustrative embodiments are not intended to be exhaustive of all embodiments according to the present invention. It will be appreciated that other embodiments may be utilized, and structural or logical modifications may be made without departing from the scope of the present invention. Therefore, the following specific description is not restrictive, and the scope of the present invention is defined by the attached claims.

[0029] Before introducing the embodiments of the present invention, some terms involved in the present invention are first explained to facilitate a better understanding of the present invention.

[0030] The terms "connection" or "coupling" and similar terms used in the present invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A", "a group" or "an" and similar terms do not indicate a quantity limitation, but indicate the presence of at least one.

[0031] The terms "include", "comprising" and similar terms used in the present invention should be understood as open terms, that is, "include / include but not limited to", indicating that other contents may also be included. The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment" and so on. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless there is a contradiction.

[0032] Figure 1 FIG. 1 shows a schematic diagram of the overall appearance of an existing leakage protection device. Figure 1 As shown in the figure, in the existing leakage protection device, the screw holes are exposed on the surface of the leakage protection device. It is easy for users to disassemble the product by themselves, which will affect the performance of the product and even cause the product to fail, and make it impossible to protect the personal safety of users during the use of the product. In addition, the waterproof performance of this leakage protection device is also poor, and water may penetrate into the product through the screw holes, thereby bringing certain safety hazards and may cause danger.

[0033] The utility model aims to provide a leakage protection device. In the leakage protection device, a first shell and a second shell are connected by a connector, a leakage protection module is placed in a cavity formed by the first shell and the second shell, and the connector is covered by a cover plate, so that the product performance is not affected by the user's disassembly, and the safety and convenience of the product are further improved. In addition, the leakage protection device provided by the utility model has a simple structure, low cost and high safety.

[0034] Reference now Figure 2a-Figure 9 The leakage protection device according to the embodiment of the utility model is described.

[0035] First reference Figure 2a-2b and Figure 3 . Figure 2a-2b Shows schematic diagrams of the overall appearance of the leakage protection device in different directions according to an embodiment of the utility model; Figure 3 The figure shows an assembly exploded diagram of a leakage protection device according to an embodiment of the utility model.

[0036] like Figure 2a-2b and Figure 3 As shown in the figure, the leakage protection device 100 includes a first housing 1, a second housing 2, an input component 3, a cover plate 4, an output component 5 and a leakage protection module 8. The second housing 2 is detachably fixed to the first housing 1 via a connector 9 and forms a receiving chamber with the first housing 1. In the present embodiment, the connector 9 includes four screws. In other embodiments, the connector 9 may also include other numbers of screws, bolts and / or studs. The leakage protection module 8 is accommodated in the receiving chamber formed by the first housing 1 and the second housing 2 and is coupled to the input component 3 and the output component 5. The leakage protection module 8 includes a switch mechanism and a circuit assembly (not shown in the figure). The switch mechanism is arranged between the input component 3 and the output component 5, and can control the power connection between the input component 3 and the output component 5. The circuit assembly can detect a leakage current signal (such as a leakage current signal on the power line 52 of the output component 5), and drive the switch mechanism to disconnect the power connection when the leakage current signal is detected. The cover plate 4 is fixed to the first housing 1 and / or the second housing 2 and covers the connector 9.

[0037] Reference below Figure 4a-6b The assembly process of the first housing 1 and the output assembly 5 of the leakage protection device 100 of this embodiment is described. Figure 4a-4b Shows exploded schematic diagrams of the first housing, the output assembly and the wire pressing block at different angles according to an embodiment of the utility model; Figure 5 The figure shows an assembly diagram of a first housing, an output assembly and a wire pressing block according to an embodiment of the utility model; Figure 6a-6b The schematic diagrams of the structure of the wire pressing block at different angles according to the embodiment of the utility model are shown.

[0038] In the present embodiment, the leakage protection device 100 also includes a wire pressing block 6. An opening 101 is provided on the first shell 1, and a part of the output component 5 extends into the accommodating cavity through the opening 101. The wire pressing block 6 is used to fix a part of the output component 5 in the accommodating cavity. The output component 5 includes a power cord 52 and a power cord bending buffer device 51 sleeved on the outside of the power cord 52. A first fixing portion 511 is provided at one end of the power cord bending buffer device 51, and a second fixing portion 601 corresponding to the position of the first fixing portion 511 is provided on the wire pressing block 6, which is used to cooperate with the first fixing portion 511 to fix the power cord bending buffer device 51. In the present embodiment, the first fixing portion 511 is a notch, and the second fixing portion 601 is a bayonet matching the notch. In other embodiments, the first fixing portion 511 and the second fixing portion 601 may also be other forms of fixing components, as long as they can fix the power cord bending buffer device 51. One side of the first shell 1 close to the second shell 2 ( Figure 4a A third fixing portion 103 is provided on the inner side of the third fixing portion 103, and a fourth fixing portion 603 corresponding to the position of the third fixing portion 103 is provided on the wire pressing block 6, and is used to cooperate with the third fixing portion 103 to fix the power cord 52. In this embodiment, the third fixing portion 103 includes two first pressing ribs, and the fourth fixing portion 603 includes two second pressing ribs.

[0039] When assembling the first housing 1 and the output assembly 5, one end of the power cord 52 and one end of the power cord bending buffer device 51 are passed through the opening 101 on the first housing 1 and extended into the accommodating cavity. One end of the power cord 52 is engaged between the first pressing rib 103 and the second pressing rib 603, and at the same time, the bayonet 601 on the wire pressing block 6 is engaged with the notch, so that the power cord bending buffer device 51 cannot be pulled out from the opening 101. The wire pressing block 6 is also provided with two wire pressing block screw holes 602. Two wire pressing block screws 7 pass through the wire pressing block screw holes 602 to fix the wire pressing block 6 on the wire pressing block screw hole column 102 of the first housing 1. When the wire pressing block screw 7 is tightened and the wire pressing block 6 is firmly fixed on the first housing 1, the first pressing rib 103 on the inner side of the first housing 1 cooperates with the second pressing rib 603 on the wire pressing block 6 to press and fix one end of the power line 52, and at the same time, the buckle 601 on the wire pressing block 6 engages the card slot 511 to fix one end of the power line bending buffer device 51. Therefore, one end of the power line 52 and one end of the power line bending buffer device 51 are fixed in the accommodating cavity.

[0040] Reference below Figure 3 and Figure 5The assembly process of the first housing 1 and the second housing 2 is described. In this embodiment, the input component 3 is a pair of plug blades, which are fixedly mounted on the leakage protection module 8 and electrically connected to the leakage protection module 8. The leakage protection module 8 is placed in the accommodating cavity formed by the first housing 1 and the second housing 2 and electrically connected to the output component 5. The second housing 2 is provided with a pair of first through holes 211 corresponding to the positions of the plug blades 3. When the second housing 2 is installed to the first housing 1, the pair of first through holes 211 are respectively aligned with the plug blades 3, so that the plug blades 3 pass through the first through holes 211 and extend to the outside of the second housing 2. The second housing 2 is also provided with four housing screw holes 207, 208, 209 and 210, and their positions correspond to the four housing screw hole columns 104, 105, 106 and 107 on the inner side of the first housing 1. Four housing screws 9 pass through the housing screw holes 207, 208, 209 and 210 to fix the second housing 2 on the housing screw hole columns 104, 105, 106 and 107 of the first housing 1.

[0041] Next reference Figure 7-Figure 9 , Figure 7 An exploded schematic diagram of a cover plate and a second housing according to an embodiment of the utility model is shown; Figure 8 A schematic structural diagram of a cover plate according to an embodiment of the utility model is shown;

[0042] Fig. 9 A schematic diagram of assembling the cover plate and the second shell according to an embodiment of the utility model is shown.

[0043] The cover plate 4 is provided with six snap buckles 401, 402, 403, 404, 405 and 406 and a pair of second through holes 407. The second shell 2 is provided with six snap-fitting parts 201, 202, 203, 204, 205 and 206 corresponding to the positions of the snap buckles. When the cover plate 4 is installed to the second shell 2, the pair of second through holes 407 are aligned with the plug blades 3 so that the plug blades 3 pass through the second through holes 407 and extend to the outside of the cover plate 4. The plug blades 3 can be inserted into a socket coupled to the power grid. At the same time, the six snap buckles 401, 402, 403, 404, 405 and 406 are respectively engaged with the snap-fitting parts 201, 202, 203, 204, 205 and 206. At this time, as shown in FIG. Fig. 9 As shown, the cover plate 4 covers the housing screws 9 and the housing screw holes 207, 208, 209 and 210, which are not exposed on the product surface. Since there is no detachable mechanism on the product surface, the performance can be prevented from being affected by user disassembly, and the safety and convenience of the product when in use can be further improved.

[0044] In this embodiment, the cover plate 4 is disposed on the side of the second housing 2 away from the first housing 1 because the housing screw holes 207, 208, 209 and 210 are disposed on the second housing 2. In other embodiments, if the housing screw holes are disposed on the first housing 1 and the housing screws fix the first housing 1 and the second housing 2 from the direction of the first housing 1, the cover plate 4 can be disposed on the side of the first housing 1 away from the second housing 2 (e.g. Figure 3 The upper side of the first shell 1).

[0045] In this embodiment, the cover plate 4 is fixed to the second housing 2 by means of snap fastening. In other embodiments, the cover plate 4 may be fixed to the second housing 2 by means of at least one of the following methods: snap fastening, welding fixing, and glue bonding fixing. In the embodiment using welding fixing and / or glue fixing, the waterproof performance of the leakage protection device 100 may be further increased.

[0046] In this embodiment, the cover plate 4 is fixed to the second housing 2. In other embodiments, the cover plate 4 may be fixed to the first housing 1, or to both the first housing 1 and the second housing 2, by any one or more combinations of the above fixing methods. For example, the cover plate 4 is fixed to the second housing 2 by snap-fitting, and is fixed to the first housing 1 by welding.

[0047] In addition, if Figure 2a and Figure 3 As shown, the surface of the first housing 1 is also provided with a reset button 111, a test button 112 and a status indicator light 113. The reset button 111 can be used to manipulate the leakage protection module 8 to reset the leakage protection module 8, so that the leakage protection device 100 is in a reset state (that is, the input component 3 and the output component 5 are in an on state). The test button 112 is used to test the leakage protection function of the leakage protection device 100. When the leakage protection device 100 is in a reset state, the power is turned on. At this time, the test button 112 is pressed, and a simulated leakage current signal is generated in the leakage protection module 8. If the leakage protection module 8 works normally, its circuit component detects the leakage current signal and drives its switch mechanism to disconnect the power connection between the input component 3 and the output component 5. If the power connection is not disconnected, it means that the leakage protection device 100 fails and loses the leakage protection function. The connection and disconnection of the status indicator light 113 can be set as needed to issue a warning or reminder to the user, for example, when the circuit component of the leakage protection module 8 detects a leakage current signal, a bright light is emitted.

[0048] The second aspect of the utility model provides an electrical appliance, comprising: a load device; and a leakage protection device according to any one of the above embodiments. The leakage protection device is coupled between the current-carrying line and the load device, and is used to supply power to the load device.

[0049] Therefore, although the present invention is described with reference to specific examples, wherein these specific examples are intended to be illustrative only and not limiting of the present invention, it is obvious to those skilled in the art that the disclosed embodiments may be changed, added or deleted without departing from the spirit and scope of protection of the present invention.

Claims

1. A leakage protection device, characterized in that: The leakage protection device comprises: a first housing, an input assembly, and an output assembly; A second shell, which is detachably fixed to the first shell via a connecting piece and forms a receiving cavity with the first shell; A leakage protection module is contained in the containing cavity and coupled with the input component and the output component, wherein the leakage protection module comprises: a switch mechanism disposed between the input assembly and the output assembly and configured to control a power connection between the input assembly and the output assembly; and a circuit component configured to detect a leakage current signal and drive the switch mechanism to disconnect the power connection when the leakage current signal is detected; and A cover plate is fixed to the first shell and / or the second shell and covers the connecting member.

2. The leakage protection device according to claim 1, characterized in that: The cover plate is arranged on a side of the second shell away from the first shell.

3. The leakage protection device according to claim 1, characterized in that: The cover plate is fixed to the first shell and / or the second shell by at least one of the following methods: snap fixation, welding fixation and glue bonding fixation.

4. The leakage protection device according to claim 1, characterized in that: The first shell and / or the second shell is provided with an opening, and a part of the output assembly extends into the accommodating cavity through the opening, and the leakage protection device further includes: A wire pressing block is arranged in the accommodating cavity and fixed to the first shell and / or the second shell, and the wire pressing block is used to fix the part of the output component in the accommodating cavity.

5. The leakage protection device according to claim 4, characterized in that: The output assembly includes a power cord and a power cord bending buffer device sleeved outside the power cord, and one end of the power cord and one end of the power cord bending buffer device extend into the accommodating cavity through the opening.

6. The leakage protection device according to claim 5, characterized in that: A first fixing portion is provided at one end of the power cord bending buffer device, and a second fixing portion corresponding to the position of the first fixing portion is provided on the wire pressing block, which is used to cooperate with the first fixing portion to fix the one end of the power cord bending buffer device in the accommodating cavity.

7. The leakage protection device according to claim 6, characterized in that: The first fixing portion includes a notch, and the second fixing portion includes a snap fit matching the notch.

8. The leakage protection device according to any one of claims 5 to 7, characterized in that: A third fixing portion is provided on a side of the first shell close to the second shell, and a fourth fixing portion corresponding to the position of the third fixing portion is provided on the wire pressing block, which is used to cooperate with the third fixing portion to fix the one end of the power cord in the accommodating cavity.

9. The leakage protection device according to claim 8, characterized in that: The third fixing portion includes at least one first pressing rib, the fourth fixing portion includes at least one second pressing rib, and the one end of the power cord is engaged between the at least one first pressing rib and the at least one second pressing rib.

10. The leakage protection device according to claim 1, characterized in that: The connection element comprises at least one screw, bolt and / or stud.

11. The leakage protection device according to claim 1, characterized in that: The second shell is provided with at least one first through hole, the cover plate is provided with at least one second through hole corresponding to the position of the at least one first through hole, and one end of the input component is connected to the leakage protection module and accommodated in the accommodating cavity, and the other end passes through the at least one first through hole and the at least one second through hole and extends to the outside of the cover plate.

12. The leakage protection device according to claim 1 or 11, characterized in that: The input assembly includes at least one plug blade.

13. The leakage protection device according to claim 1, characterized in that: The first housing is also provided with a reset button and a test button. The reset button is used to reset the leakage protection module, and the test button is used to test the leakage protection function of the leakage protection device.

14. An electrical appliance, characterized in that: The electrical appliances include: load equipment; and The leakage protection device according to any one of claims 1 to 13, which is coupled between the current-carrying line and the load device, and is used to supply power to the load device.

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