Shell of residual-current circuit breaker

Abstract

A shell of a residual-current circuit breaker comprises a left shell body, a middle shell body and a right shell body, two first binding post installation cavities which are symmetrically distributed and used for arranging binding posts and a first mixed installation cavity located between the two first binding post installation cavities are formed in the left shell body, one end of the left shell body extends outwards, and the other end of the left shell body extends outwards. The upper end of the extension part is provided with a first guide mounting cavity, the lower end of the extension part is provided with a first tripping mounting cavity, the configuration of the middle shell is matched with the configuration of the left shell, and the middle shell is provided with a second binding post mounting cavity, a second mixed mounting cavity, a second guide mounting cavity and a second tripping mounting cavity; the middle shell is further provided with a third binding post installation cavity, the extending part is provided with a third guiding installation cavity and a first conducting strip installation cavity, the configuration of the right shell is matched with the configuration of the middle shell, and the right shell is provided with a fourth guiding installation cavity, a fourth binding post installation cavity and a second conducting strip installation cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a shell of a leakage circuit breaker. Background Art

[0002] The leakage circuit breaker is mainly used to protect equipment from leakage faults and to protect people from fatal electric shock. It has overload and short-circuit protection functions and can be used to protect lines or motors from overload and short circuit. It can also be used as an infrequent switching start of lines under normal circumstances.

[0003] Currently, the installation area provided inside the shell of leakage circuit breakers on the market cannot provide directional installation for all electronic components. As a result, the electronic components need to be installed in an avoidance manner based on user experience. After the electronic components are connected, the interior will be crowded, which will cause the leakage circuit breaker to easily generate heat during operation, and the heat is easily accumulated inside. Utility Model Content

[0004] The present invention aims to solve the above-mentioned shortcomings of the prior art and provides a housing of a leakage circuit breaker to solve the above-mentioned problems.

[0005] The utility model solves the technical problem by adopting a technical solution: the housing of the leakage circuit breaker includes a left housing, a middle housing, and a right housing cover which are assembled from left to right. The left housing, the middle housing, and the right housing cover are all provided with mounting holes for setting a locking structure after assembly. The left housing has two symmetrically distributed first terminal mounting cavities for arranging terminal posts, and a first mixed mounting cavity located between the two first terminal mounting cavities and respectively used to arrange a current amplifier and a current transformer. One end of the left housing extends outward, and the upper end of the extended portion has a first guide for arranging an R button. The lower end of the housing has a first tripping mounting cavity for setting a tripping coil, the configuration of the middle shell matches the configuration of the left shell, and has a second terminal mounting cavity, a second mixed mounting cavity, a second guide mounting cavity, and a second tripping mounting cavity, and the middle shell also has a third terminal mounting cavity for setting a terminal, a third guide mounting cavity for setting a T button and a first conductive plate mounting cavity for setting a conductive plate for testing on the extended part, the configuration of the right shell cover matches the configuration of the middle shell, and has a fourth guide mounting cavity, a fourth terminal mounting cavity, and a second conductive plate mounting cavity.

[0006] For further improvement, the inner cavity baffles of the two first terminal installation cavities are each provided with an outlet wire groove that communicates with the first mixed installation cavity.

[0007] For further improvement, the first guide installation cavity on the left shell and the second guide installation cavity on the right shell are jointly provided with a first lateral opening, and the first guide installation cavity on the left shell is provided with a limiting block for limiting the moving distance of the R button after the R button is pressed and moved, and the first lateral opening and the limiting block are arranged relative to each other.

[0008] For further improvement, the left shell has two symmetrically distributed columns on the extended part, which are located in the first tripping mounting cavity and are used to form the mounting hole. A first side block is provided on the outer peripheral surface of the column. The first tripping mounting cavity is provided with two second side blocks at the relative positions of the two first side blocks, which form a positioning area for the final position of the tripping coil in the first tripping mounting cavity when combined with the first side blocks. The first side block and the second side block both have an L-shaped configuration.

[0009] For further improvement, the second mixed installation cavity and the second tripping installation cavity are both hollowed out, and the second mixed installation cavity has a partition rod in the middle shell for separating the positions of the current amplifier and the current transformer, and the second tripping installation cavity is provided with two baffles on the extension part of the middle shell to constrain the tripping coil, and the baffles are located on the inner side of the adjacent first side baffle or the second side baffle, and one of the baffles is provided with a baffle.

[0010] For further improvement, the third guide installation cavity on the middle shell body and the fourth guide installation cavity on the right shell cover are jointly provided with a second lateral opening, which is used to form a cavity baffle of the first conductive sheet installation cavity and serve as a limiting structure for limiting the movement distance of the T button after the T button is pressed and moved.

[0011] The beneficial effects of the utility model are:

[0012] The mounting area provided by the housing of the present invention can provide directional installation for all electronic components, without the need for avoidance settings based on user experience. After the electronic components are connected, there will be no crowding inside, so that the leakage circuit breaker is less likely to generate heat during operation and the heat can be easily discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic structural diagram of the left housing of the present utility model;

[0015] Figure 3 This is a schematic structural diagram of the front side of the housing in the present invention;

[0016] Figure 4 This is a schematic structural diagram of the back side of the housing in the present invention;

[0017] Figure 5 It is a structural schematic diagram of the right shell cover of the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Referring to the accompanying drawings: The housing of this leakage circuit breaker includes a left housing 1, a middle housing 2, and a right housing cover 3 that are assembled from left to right. The left housing 1, the middle housing 2, and the right housing cover 3 are all provided with mounting holes 4 for setting a locking structure after assembly. The left housing 1 has two symmetrically distributed first terminal mounting cavities 11 for arranging terminal posts, and a first mixed mounting cavity 12 located between the two first terminal mounting cavities 11 and respectively used to arrange a current amplifier and a current transformer. One end of the left housing 1 extends outward, and the upper end of the extended portion has a first guide mounting cavity 13 for arranging an R button, and the lower end has a first guide mounting cavity 13 for arranging a current transformer. The first tripping installation cavity 14 of the tripping coil, the configuration of the middle shell 2 matches that of the left shell 1, and has a second terminal installation cavity 21, a second mixed installation cavity 22, a second guide installation cavity 23, and a second tripping installation cavity 24. The middle shell 2 also has a third terminal installation cavity 25 for setting the terminal, a third guide installation cavity 26 for setting the T button on the extension portion, and a first conductive plate installation cavity 27 for setting the test conductive plate. The configuration of the right shell cover 3 matches that of the middle shell 2, and has a fourth guide installation cavity 31, a fourth terminal installation cavity 32, and a second conductive plate installation cavity 33. The principle of the utility model is to use the left shell 1, the middle shell 2, and the right shell cover 3 to form a whole, and the three are matched with each other:

[0020] 1. The left housing 1 and the middle housing 2 cooperate with each other, that is, the first terminal installation cavity 11 and the second terminal installation cavity 21 form a complete cavity for arranging the terminal, and the two formed by the two and used to arrange the terminal have two cavities for arranging the terminal, respectively for arranging the terminal for connecting the live wire and the terminal for connecting the neutral wire. The first mixed installation cavity 12 and the second mixed installation cavity 22 form a complete cavity for arranging the current amplifier and the current transformer. The first guide installation cavity 13 and the second guide installation cavity 23 form a complete cavity for arranging the R button, so that the R button can move within the cavity. The first trip installation cavity 14 and the second trip installation cavity 24 form a complete cavity for arranging the trip coil. These cavities are constrained to ensure that the various electronic components can be stably maintained inside when placed inside.

[0021] 2. The middle shell 2 and the right shell cooperate with each other, that is, the third terminal mounting cavity 25 and the fourth terminal mounting cavity 32 form a complete cavity for arranging the terminal, which is also used to connect the neutral line. The third guide mounting cavity 26 and the fourth guide mounting cavity 31 form a complete cavity for arranging the T button, so that the T button can move within the cavity. The first conductive plate mounting cavity 27 and the second conductive plate mounting cavity 33 form a complete cavity for arranging the test conductive plate. The conductive plate can generate current when in contact with the T button. It has no positioning function, that is, it can be separated from the contact with the conductive plate after the pressure is lost, so as to detect whether the leakage circuit breaker can operate normally in this way. The above two methods enable the installation area provided inside the housing of the leakage circuit breaker to provide directional installation for all electronic components, without the need for avoidance setting based on user experience. After the electronic components are connected, there will be no crowding inside, so that the leakage circuit breaker is not easy to generate heat during operation, and the heat is easily discharged.

[0022] The inner cavity baffles of the two first terminal installation cavities 11 are each provided with an outlet groove 15 that communicates with the first mixed installation cavity 12, so that the neutral wire and the live wire connected to the corresponding terminal can be extended to the outside of the first terminal installation cavity 11. After the live wire is extended, it is connected to the current transformer, and the neutral wire is connected to the ground wire after it is extended.

[0023] The first guide installation cavity 13 on the left shell 1 and the second guide installation cavity 23 on the right shell 2 are jointly provided with a first lateral opening 5, and the first guide installation cavity 13 is provided with a limiting block 13-a on the left shell 1 for limiting the moving distance of the R button after the R button is pressed and moved. The first lateral opening 5 and the limiting block 13-a are arranged relative to each other, and the first guide installation cavity 13 and the second guide installation cavity 23 have the same configuration. They use the guide structure formed on the side surface corresponding to the R button to ensure that the R button can move while also preventing it from leaving the cavity. The setting of the first lateral opening 5 is considered The R button needs manual operation, that is, it needs to be pressed before closing the circuit breaker (for protection). When the current is too large, it can use the tripping action triggered by the tripping coil to drive the R button to pop out, so that the circuit breaker is disconnected. Therefore, the first lateral opening 5 is used to make the R button exposed to the user's visual range before and after pressing. It is more exposed before pressing and less exposed after pressing. This is not only convenient for users, but also can provide users with more direct observation. The limiting block 13-a is used to limit the moving distance of the R button after pressing, so that the R button will not completely enter the first guide installation cavity 13 after being pressed.

[0024] The left shell body 1 has two symmetrically distributed columns 16 on the extended part, which are located in the first tripping mounting cavity 14 and are used to form the mounting hole 4. A first side block 16-a is provided on the outer peripheral surface of the column 16. The first tripping mounting cavity 14 is provided with two second side blocks 14-a at the relative positions of the two first side blocks 16-a, which form a positioning area for the final position of the tripping coil in the first tripping mounting cavity 14 when combined with the first side blocks 16-a. The first side blocks 16-a and the second side blocks 14-a are both L-shaped. Such an arrangement can obtain a limited positioning area that matches the volume of the tripping coil. When the tripping coil is placed in the positioning area, it can quickly limit its final position in the first tripping mounting cavity 14, and after placement, the two first side blocks 16-a and the two second side blocks 14-a act on the four corner positions of the tripping coil respectively. In this way, the position of the tripping coil can be stably maintained in the first tripping mounting cavity 14 to avoid position displacement when the tripping action is triggered.

[0025] The second mixed installation cavity 22 and the second trip installation cavity 24 are both hollowed out, and the second mixed installation cavity 22 has a separation rod 22-a for separating the positions of the current amplifier and the current transformer in the middle shell 2. The second trip installation cavity 24 is provided with two baffles 24-a on the extension of the middle shell 2 to constrain the trip coil. The baffles 24-a are located on the inner side of the adjacent first side baffle 16-a or the second side baffle 14-a, and one of the baffles 24-a is provided with a baffle 24-a1. The hollowing allows the electronic components inside the circuit breaker to utilize the heat when generating working heat. The hollow space flows quickly toward the exit, so that the heat can be discharged in time. The partition rod 22-a is used to separate the current amplifier and current transformer in the first mixed installation cavity 12 and the second mixed installation cavity 22, so as to clarify the respective setting positions of the two. The blocking rod 24-a is used to generate an upper constraint on the tripping coil so that the tripping coil can be stably maintained in its final position in the first tripping installation cavity 14 to avoid position displacement when the tripping action is triggered. The blocking piece 24-a1 further increases the area of ​​the upper constraint and improves the positioning constraint effect.

[0026] The third guide mounting cavity 26 on the middle shell 2 and the fourth guide mounting cavity 31 on the right shell cover 3 are jointly provided with a second lateral opening 6, which is used to form a cavity baffle of the first conductive sheet mounting cavity 27 and is used as a limiting structure to limit the movement distance of the T button after the T button is pressed and moved. The third guide mounting cavity 26 and the fourth guide mounting cavity 31 have the same configuration. They use the guide structure formed on the side surface corresponding to the T button to ensure that the T button can move while also preventing it from leaving the cavity. The setting of the second lateral opening 6 takes into account that the T button requires manual operation to make it contact with the conductive sheet and generate current. It has no positioning function, that is, it can be separated from the contact with the conductive sheet after the pressure is lost, so as to detect whether the leakage circuit breaker can operate normally. The cavity baffle of the first conductive sheet mounting cavity 27 is used to limit the movement distance of the T button after being pressed, that is, the T button will not fully enter the third guide mounting cavity 26 after being pressed.

[0027] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A housing of a leakage circuit breaker, comprising a left housing (1), a middle housing (2), and a right housing cover (3) assembled together from left to right, wherein the left housing (1), the middle housing (2), and the right housing cover (3) are all provided with mounting holes (4) for arranging a locking structure after the assembly, and characterized in that: The left housing (1) has two symmetrically distributed first terminal mounting cavities (11) for arranging terminal posts, and a first mixed mounting cavity (12) located between the two first terminal mounting cavities (11) for arranging current amplifiers and current transformers, respectively. One end of the left housing (1) extends outward, and the upper end of the extended portion has a first guide mounting cavity (13) for arranging an R button, and the lower end has a first tripping mounting cavity (14) for arranging a tripping coil. The configuration of the middle housing (2) matches that of the left housing (1) and has a second terminal mounting cavity. (21), a second mixed installation cavity (22), a second guide installation cavity (23), and a second trip installation cavity (24), and the middle shell (2) also has a third terminal installation cavity (25) for setting a terminal, a third guide installation cavity (26) for setting a T button and a first conductive sheet installation cavity (27) for setting a conductive sheet for testing on the extension portion, the configuration of the right shell cover (3) matches the configuration of the middle shell (2), and has a fourth guide installation cavity (31), a fourth terminal installation cavity (32), and a second conductive sheet installation cavity (33).

2. The housing of the leakage circuit breaker according to claim 1, characterized in that: An outlet groove (15) communicating with the first hybrid installation cavity (12) is provided on the inner cavity baffles of the two first terminal installation cavities (11).

3. The housing of the leakage circuit breaker according to claim 1, characterized in that: The first guide installation cavity (13) on the left shell (1) and the second guide installation cavity (23) on the middle shell (2) are both provided with a first lateral opening (5); the first guide installation cavity (13) on the left shell (1) is provided with a limiting block (13-a) for limiting the moving distance of the R button after the R button is pressed and moved; the first lateral opening (5) and the limiting block (13-a) are arranged relative to each other.

4. The housing of the leakage circuit breaker according to claim 1, characterized in that: The left housing (1) has two symmetrically distributed columns (16) on the extended portion and located in the first tripping installation cavity (14) and used to form the installation hole (4). A first side block (16-a) is provided on the outer peripheral surface of the column (16). The first tripping installation cavity (14) is provided with two second side blocks (14-a) at relative positions of the two first side blocks (16-a). When combined with the first side blocks (16-a), the first side block (16-a) and the second side block (14-a) form a positioning area for clearly defining the final position of the tripping coil in the first tripping installation cavity (14). The first side block (16-a) and the second side block (14-a) both have an L-shaped configuration.

5. The housing of the leakage circuit breaker according to claim 4, characterized in that: The second hybrid installation cavity (22) and the second tripping installation cavity (24) are both hollowed out, and the second hybrid installation cavity (22) has a separation rod (22-a) in the middle shell (2) for separating the positions of the current amplifier and the current transformer, and the second tripping installation cavity (24) is provided with two blocking rods (24-a) on the extension of the middle shell (2) for constraining the tripping coil, and the blocking rods (24-a) are located on the inner side of the adjacent first side block (16-a) or the second side block (14-a), and a blocking piece (24-a1) is provided on one of the blocking rods (24-a).

6. The housing of the leakage circuit breaker according to claim 1, characterized in that: The third guide installation cavity (26) on the middle shell (2) and the fourth guide installation cavity (31) on the right shell cover (3) are both provided with a second lateral opening (6) for forming a cavity baffle of the first conductive plate installation cavity (27) and used as a limiting structure for limiting the movement distance of the T button after the T button is pressed and moved.

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