Surge protector and contactor

Abstract

The utility model belongs to the technical field of switching devices, and discloses a surge protector and a contactor. The surge protector comprises an outer shell, an electronic component board and a connecting terminal, the electronic component board is arranged in the outer shell, the connecting terminal is a conducting bar, one end of the connecting terminal is welded to the electronic component board, the connecting terminal is of a U-shaped structure, the U-shaped structure comprises a first board, a second board and a third board, the first board and the third board are oppositely arranged, and the second board is arranged on the first board. The second plate is connected between the first plate and the third plate, the first plate is welded to the electronic component plate, and the third plate is connected to the wiring end of the coil. According to the surge protector, electric connection between the coil and the surge protector is changed into conducting bar hard connection, so that the problem that the wire is easily separated from the coil due to the bending stress effect of the wire is avoided, and the connection stability between the connecting terminal and the coil can be ensured; and the use safety and reliability of the whole surge protector and the contactor are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of switch electrical appliances, in particular to a surge protector and a contactor. Background Art

[0002] Contactors are electrical appliances used to frequently connect and disconnect AC and DC main circuits and large-capacity control currents at long distances. They have the advantages of rapid action, large control capacity, safe and convenient use, frequent operation and long-distance operation. They are mainly used to connect and disconnect load currents. Among them, surge protectors are electronic devices that can provide safety protection for contactors. During the assembly process of the contactors, it is necessary to first electrically connect the connection terminals on the surge protector to the coils of the contactors.

[0003] However, since the current connecting terminals are flexible wires, in order to ensure that the flexible wires can be accurately connected to the coils, the flexible wires are bent. However, due to the bending stress, the flexible wires are easily detached from the coils, and the safety and reliability of the contactor cannot be guaranteed.

[0004] Therefore, a surge protector and a contactor are urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a surge protector and a contactor, which can ensure the connection stability between the connecting terminal and the wiring terminal of the coil, and ensure the safety and reliability of the use of the entire surge protector and the contactor.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Surge protectors, including:

[0008] An outer shell, an electronic component board and a connecting terminal, wherein the electronic component board is disposed in the outer shell, and the connecting terminal is a conductive bar;

[0009] One end of the connecting terminal is welded to the electronic component board;

[0010] The connecting terminal is a U-shaped structure, and the U-shaped structure includes:

[0011] A first plate, a second plate and a third plate, wherein the first plate is arranged opposite to the third plate, the second plate is connected between the first plate and the third plate, the first plate is welded to the electronic component board, and the third plate is connected to the terminal of the coil.

[0012] As an optional solution, the outer shell includes a shell and a cover plate that are interlocked and connected to each other, the electronic component board is arranged in the cavity of the shell, and the cover plate covers the opening of the cavity; one of the shell and the second plate is provided with a latching protrusion, and the other is provided with a latching hole, and the latching protrusion can be latched into the latching hole.

[0013] As an optional solution, a protective plate is connected to the cover plate, and when the connecting terminal is connected to the wiring terminal of the coil, the protective plate is used to shield the connecting terminal exposed on the outside, and the card protrudes through the protective plate.

[0014] The contactor comprises a contactor base and the surge protector as described above, wherein a coil is arranged in the contactor base and the coil is provided with a connection terminal.

[0015] As an optional solution, the connection terminal is fixed to the contactor base by a fastener, a fork connection structure is formed on the connection terminal, and the fork connection structure is plugged into the fastener.

[0016] As an optional solution, an installation space is formed on the contactor base, and the outer shell is installed in the installation space; and one of the top surface of the outer shell and the inner top wall surface of the installation space is provided with a guide rib, and the other is provided with a guide groove, and the guide rib can slide in the guide groove.

[0017] As an optional solution, one of the top surface of the outer shell and the inner top wall surface of the installation space is provided with an elastic fixing piece, and the other is provided with a limiting groove. When the elastic fixing piece abuts against the limiting groove, the connecting terminal is plugged into the wiring terminal.

[0018] As an optional solution, a guiding inclined surface matching the elastic fixing piece is provided at the front end of the limiting groove, and the elastic fixing piece is squeezed and elastically deformed by the guiding inclined surface so that the elastic fixing piece moves into the limiting groove.

[0019] Beneficial effects:

[0020] The surge protector proposed in the utility model realizes electrical connection between the surge protector and the coil by arranging the electronic component board in the outer shell and connecting one end of the connecting terminal to the wiring terminal of the coil; since the connecting terminal is a conductive bar, that is, the electrical connection between the coil and the surge protector is changed from the soft connection of the wire in the prior art to the hard connection of the conductive bar, thereby avoiding the problem that the wire is easily detached from the coil due to the bending stress of the wire, thereby ensuring the connection stability between the connecting terminal and the coil, and ensuring the safety and reliability of the entire surge protector and the contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the contactor provided by the utility model (after installing the surge protector) Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the contactor provided by the utility model (before installing the surge protector) Figure 2 ;

[0023] Figure 3 It is a structural schematic diagram of the surge protector (excluding the cover plate) provided by the utility model.

[0024] In the figure:

[0025] 1. Contactor base; 11. Installation space; 12. Wiring terminal; 13. Guide slope;

[0026] 2. Surge protector; 21. Outer shell; 211. Shell; 2111. Boss; 2112. Opening; 2113. Guide rib; 2114. Elastic fixing member; 212. Cover plate; 2121. Protective plate; 22. Electronic component board; 23. Connecting terminal; 231. First board; 232. Second board; 233. Third board; 2331. Fork-joint structure. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] like Figure 1 As shown, in this embodiment, a surge protector 2 and a contactor including the surge protector 2 are proposed, and the surge protector 2 and the contactor have high safety and reliability in use; and the contactor also includes a contactor base 1, in which a coil is arranged, and the coil has a terminal 12. There is no limitation on the specific type of the contactor, and any contactor that needs to electrically connect the coil to the surge protector 2 is applicable.

[0032] Specifically, Figures 1 to 3 As shown, the surge protector 2 includes an outer shell 21, an electronic component board 22 and a connecting terminal 23. The electronic component board 22 is arranged in the outer shell 21. The connecting terminal 23 is a conductive bar. One end of the connecting terminal 23 is connected to the outer surface of the electronic component board 22, and the other end of the connecting terminal 23 passes through the outer shell 21 and is connected to the wiring terminal 12 of the coil to achieve electrical connection between the surge protector 2 and the coil.

[0033] Compared with the prior art, the surge protector 2 in this embodiment changes the structure of the connecting terminal 23; by making the connecting terminal 23 a conductive bar, that is, the electrical connection between the coil and the surge protector 2 is changed from the soft connection of the wire in the prior art to the hard connection of the conductive bar, thereby avoiding the problem of the wire being easily detached from the coil due to the bending stress of the wire, thereby ensuring the connection stability between the connecting terminal 23 and the coil, and ensuring the safety and reliability of the entire surge protector 2.

[0034] Specifically, if Figures 1 to 3As shown, the outer shell 21 includes a shell 211 and a cover 212 that are interlocked and connected to each other to facilitate loading and unloading of the shell 211 and the cover 212; the electronic component board 22 is arranged in the cavity of the shell 211, and the cover 212 is covered at the opening 2112 of the cavity to form a complete outer shell 21, and the electronic component board 22 is located inside the outer shell 21 to avoid the problem of damage caused by exposure of the electronic component board 22.

[0035] Furthermore, the end of the connecting terminal 23 that is not connected to the terminal 12 is welded to the electronic component board 22; through the welding connection, on the one hand, the connection between the connecting terminal 23 and the electronic component board 22 can be made more stable; on the other hand, the structure of the entire surge protector 2 is simpler, and the electrical connection between the connecting terminal 23 and the electronic component board 22 can be achieved without the use of additional connectors.

[0036] It is worth noting that the main improvement in this embodiment lies in the electrical connection method between the surge protector 2 and the coil. The other components of the contactor are not described in detail here, and the structure of the existing contactor can be referred to. In this embodiment, the electronic component board 22 is a common structure in the existing surge protector 2, and the working principle of the electronic component board 22 is not described in detail here.

[0037] Specifically, if Figures 1 to 3 As shown, the connecting terminal 23 is a U-shaped structure, which includes a first plate 231, a second plate 232 and a third plate 233. The first plate 231 and the third plate 233 are arranged opposite to and in parallel, and the second plate 232 is connected between the first plate 231 and the third plate 233. The first plate 231 is welded on the electronic component board 22, and the second plate 232 vertically passes through the connection gap between the shell 211 and the cover plate 212, that is, a part of the second plate 232 is located on the inner side of the outer shell 21, and the other part of the second plate 232 is located on the outer side of the outer shell 21, and the third plate 233 is connected to the terminal 12.

[0038] By setting the connecting terminal 23 as a U-shaped structure, the structure of the entire connecting terminal 23 is relatively simple, and can meet the purpose of electrically connecting with the electronic component board 22 and the terminal 12 respectively; wherein, the welding position of the first plate 231 on the electronic component board 22 matches the setting position of the terminal 12 on the contactor base 1; and, the length of the second plate 232 matches the setting height of the terminal 12 on the contactor base 1, so that when the outer shell 21 is installed on the contactor base 1, the third plate 233 can be just connected to the terminal 12.

[0039] During the actual welding process, due to the longer length of the second board 232 , after the first board 231 is welded to the electronic component board 22 , the second board 232 and the third board 233 are prone to shaking or swinging, so that the third board 233 cannot be accurately connected to the terminal 12 .

[0040] In order to solve the above problems, in this embodiment, Figure 2 and Figure 3 As shown, a latching protrusion 2111 is provided on one of the shell 211 and the second plate 232, and a latching hole is provided on the other, and the latching protrusion 2111 can be latched into the latching hole; through the latching action between the latching protrusion 2111 and the latching hole, the shell 211 can provide a limiting and fixing effect for the second plate 232, thereby preventing the second plate 232 and the third plate 233 from shaking or swinging, and ensuring that the third plate 233 can be accurately connected to the terminal 12 without any problem of deviation.

[0041] In this embodiment, Figure 2 and Figure 3 As shown, the second plate 232 of the connection terminal 23 is provided with the above-mentioned locking hole, and the housing 211 is provided with the above-mentioned locking protrusion 2111. In other embodiments, the second plate 232 of the connection terminal 23 may also be provided with a locking protrusion 2111, and the housing 211 may be provided with a locking hole.

[0042] Furthermore, if Figure 1 and Figure 2 As shown, a protective plate 2121 is connected to the cover plate 212. When the third plate 233 is connected to the terminal 12 of the coil, the protective plate 2121 is used to cover the connecting terminal 23 exposed on the outside, that is, the protective plate 2121 can cover the connecting terminal 23 that is in the installed state and exposed on the outside, so that the protective plate 2121 can provide support and stability for the first plate 231 and the second plate 232, avoiding the problem of shaking or swinging of the second plate 232, thereby better ensuring that the third plate 233 is accurately connected to the terminal 12, so that the docking position between the third plate 233 and the terminal 12 is more accurate.

[0043] Specifically, Figure 1 and Figure 2 As shown, the latch 2111 passes through the latch hole on the second plate 232 and then passes through the protective plate 2121. That is, a limiting hole is set on the protective plate 2121, and the latch 2111 passes through the latch hole and the limiting hole in sequence to ensure the connection stability between the protective plate 2121, the second plate 232 and the shell 211, so that the protective plate 2121 can better support and stabilize the second plate 232, further avoiding the problem of shaking or swinging of the second plate 232.

[0044] Furthermore, the protective plate 2121 is made of an insulating material, so that the protective plate 2121 can also provide insulation for the second plate 232, ensure the insulation between the second plate 232 and the surrounding environment, and prevent the first plate 231 and the second plate 232 from accidentally contacting electrical components in the surrounding environment; and, the protective plate 2121 and the cover plate 212 are an integrally molded structure, and the cover plate 212 and the shell 211 are both made of insulating materials.

[0045] Specifically, the terminal 12 is fixed in the contactor base 1 by a fastener, a fork structure 2331 is formed on the third plate 233, and the fork structure 2331 is plugged into the fastener to achieve electrical connection between the third plate 233 and the terminal 12. In this embodiment, the fastener may be a screw.

[0046] By plugging the fork structure 2331 into the fastener, on the one hand, the third plate 233 will not affect the structure and wiring function of the coil itself; on the other hand, there is no need to change the structure of the coil and the entire contactor base 1, that is, the electrical connection between the third plate 233 and the terminal 12 can be ensured without affecting the structure of the entire contactor base 1.

[0047] Furthermore, if Figure 1 and Figure 2 As shown, a mounting space 11 is formed on the contactor base 1, and the outer shell 21 is mounted in the mounting space 11; and a guide rib 2113 is provided on one of the top surface of the shell 211 and the inner top wall surface of the mounting space 11, and a guide groove is provided on the other, and the guide rib 2113 can slide in the guide groove. In this embodiment, the above-mentioned guide rib 2113 is provided on the top surface of the shell 211, and the above-mentioned guide groove is provided on the inner top wall surface of the mounting space 11.

[0048] Specifically, when the outer shell 21 is installed in the installation space 11, the guide rib 2113 can slide in the guide groove to provide a guide for the installation of the outer shell 21, ensuring that the outer shell 21 can be accurately installed in the installation space 11, thereby ensuring the guidance and reliability of the outer shell 21 during the installation process.

[0049] Furthermore, if Figure 2 As shown, an elastic fixing member 2114 is provided on one of the top surface of the housing 211 and the inner top wall surface of the installation space 11, and a limiting groove is provided on the other, and when the elastic fixing member 2114 abuts against the limiting groove and restores elastic deformation, the third plate 233 is plugged into the terminal 12. In this embodiment, the elastic fixing member 2114 is provided on the top surface of the housing 211, and the limiting groove is provided on the inner top wall surface of the installation space 11.

[0050] Specifically, Figure 2 As shown, a guide slope 13 matching the elastic fixing member 2114 is provided at the front end of the limiting groove, that is, a guide slope 13 connected to the limiting groove is also provided on the inner top wall surface of the installation space 11, and the elastic fixing member 2114 and the guide slope 13 are mutually squeezed and elastically deformed, so that the elastic fixing member 2114 moves into the limiting groove and automatically restores the elastic deformation. The front end of the limiting groove specifically refers to the end of the limiting groove close to the second plate 232.

[0051] Specifically, during the sliding of the guide rib 2113 in the guide groove, the elastic fixing member 2114 can abut against the guide slope 13. Due to the extrusion effect between the elastic fixing member 2114 and the guide slope 13, the elastic fixing member 2114 undergoes elastic deformation. During the further sliding of the guide rib 2113 in the guide groove, the elastic fixing member 2114 can move into the limiting groove and automatically restore the elastic deformation. At this time, the elastic fixing member 2114 is limited and fixed in the limiting groove, and the third plate 233 is just plugged into the fastener of the terminal 12.

[0052] The elastic fixing member 2114 can be limited in the limiting groove by the guiding and squeezing effect of the guiding inclined surface 13 on the elastic fixing member 2114. Due to the limiting and fixing effect of the limiting groove on the elastic fixing member 2114, the mutual fixation between the housing 211 and the contactor base 1 is ensured, so that the entire surge protector 2 will not be detached from the contactor base 1. In this embodiment, the elastic fixing member 2114 is specifically a block structure matching the guiding inclined surface 13 and the limiting groove.

[0053] Specifically, a plurality of connection terminals 23 are provided, and one connection terminal 23 is provided corresponding to one wiring terminal 12. Figure 1 and Figure 2 As shown, two wiring terminals 12 are provided, and correspondingly, two connection terminals 23 are provided. Here, the specific number of connection terminals 23 is not limited, and needs to be determined according to the actual number of wiring terminals 12.

[0054] The surge protector 2 in this embodiment ensures the connection stability between the connecting terminal 23 and the terminal 12 by setting the connecting terminal 23 as a conductive row; and, through the clamping action between the clamping protrusion 2111 and the clamping hole, and the protective action of the protective plate 2121 on the second plate 232, the second plate 232 and the third plate 233 will not shake or swing, thereby ensuring that the third plate 233 can be accurately plugged into the fastener of the terminal 12; at the same time, through the guiding action between the guide rib 2113 and the guide groove, and the limiting action of the elastic fixing member 2114 in the limiting groove, the installation guidance and stability of the outer shell 21 in the installation space 11 are guaranteed.

[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A surge protector, characterized in that: include: An outer shell (21), an electronic component board (22) and a connecting terminal (23), wherein the electronic component board (22) is arranged in the outer shell (21), and the connecting terminal (23) is a conductive bar; One end of the connecting terminal (23) is welded to the electronic component board (22); The connecting terminal (23) is a U-shaped structure, and the U-shaped structure comprises: A first plate (231), a second plate (232) and a third plate (233), wherein the first plate (231) and the third plate (233) are arranged opposite to each other, the second plate (232) is connected between the first plate (231) and the third plate (233), the first plate (231) is welded to the electronic component board (22), and the third plate (233) is connected to the wiring terminal (12) of the coil.

2. The surge protector according to claim 1, characterized in that: The outer shell (21) comprises a shell (211) and a cover plate (212) which are interlocked and connected, the electronic component board (22) is arranged in the cavity of the shell (211), and the cover plate (212) is covered to the opening (2112) of the cavity; one of the shell (211) and the second plate (232) is provided with a latching protrusion (2111), and the other is provided with a latching hole, and the latching protrusion (2111) can be latched into the latching hole.

3. The surge protector according to claim 2, characterized in that: A protective plate (2121) is connected to the cover plate (212); when the connection terminal (23) is connected to the wiring terminal (12) of the coil, the protective plate (2121) is used to shield the connection terminal (23) exposed on the outside, and the clamping protrusion (2111) is passed through the protective plate (2121).

4. A contactor, characterized in that: It comprises a contactor base (1) and a surge protector as claimed in any one of claims 1 to 3, wherein a coil is arranged inside the contactor base (1), and the coil is provided with a connection terminal (12).

5. The contactor according to claim 4, characterized in that: The wiring terminal (12) is fixed to the contactor base (1) by means of a fastener, and a forked structure (2331) is formed on the connecting terminal (23), and the forked structure (2331) is plugged into the fastener.

6. The contactor according to claim 4, characterized in that: An installation space (11) is formed on the contactor base (1), and the outer shell (21) is installed in the installation space (11); and one of the top surface of the outer shell (21) and the inner top wall surface of the installation space (11) is provided with a guide rib (2113), and the other is provided with a guide groove, and the guide rib (2113) can slide in the guide groove.

7. The contactor according to claim 6, characterized in that: One of the top surface of the outer shell (21) and the inner top wall surface of the installation space (11) is provided with an elastic fixing piece (2114), and the other is provided with a limiting groove, and when the elastic fixing piece (2114) abuts against the limiting groove, the connecting terminal (23) is plugged into the wiring terminal (12).

8. The contactor according to claim 7, characterized in that: A guiding inclined surface (13) matching the elastic fixing piece (2114) is arranged at the front end of the limiting groove, and the elastic fixing piece (2114) is squeezed and elastically deformed by the guiding inclined surface (13) so that the elastic fixing piece (2114) moves into the limiting groove.

Images