Surge suppressors

Abstract

The utility model belongs to the technical field of low-voltage electrical appliances, and discloses a surge suppressor, including a shell, an end cover, a circuit board and a metal wiring board, wherein the shell is connected to the shell of a contactor; the circuit board is arranged in the shell, the end cover is used to cover the shell, and the end cover is provided with an extension portion, and the side of the extension portion facing the shell is provided with a groove connected to the inside of the shell; the metal wiring board includes an integrally formed first connection portion, a second connection portion and an intermediate portion connected to the first connection portion and the second connection portion, the first connection portion is arranged in the shell and electrically connected to the circuit board, the second connection portion is used to be electrically connected to the wiring terminal of the contactor, and the intermediate portion is located outside the shell and limited in the groove. The surge suppressor can support the intermediate portion of the metal wiring board through the extension portion, and the assembly is more convenient; the intermediate portion is limited in the groove, so as to realize the precise positioning of the metal wiring board, further improve the assembly efficiency; and prevent it from being exposed to weathering, thereby improving the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a surge suppressor. Background Art

[0002] A surge suppressor is a device that provides safety protection for contactors. When a spike current or voltage suddenly occurs in a circuit due to external interference, the surge suppressor can conduct and shunt the current in a very short time, thereby preventing the spike current or voltage from damaging other devices in the circuit.

[0003] The surge suppressor exists as an accessory of the contactor. The surge suppressor is assembled to the housing of the contactor. A wire is provided in the surge suppressor. The wire extends out of the housing of the surge suppressor and is connected to the terminal on the contactor. The wire connection method of this structure has low reliability and is inconvenient to install. In addition, the wire is exposed to the external environment, the wire is prone to aging, and the service life is reduced. Utility Model Content

[0004] The utility model aims to provide a surge suppressor to improve installation efficiency and service life.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A surge suppressor is provided on the contactor, and the surge suppressor comprises:

[0007] A housing connected to the outer shell of the contactor;

[0008] An end cover, used to cover the shell, and the end cover is provided with an extension portion, and the side of the extension portion facing the shell is provided with a groove communicating with the inside of the shell;

[0009] A circuit board is arranged in the housing;

[0010] A metal terminal block comprises an integrally formed first connection portion, a second connection portion and an intermediate portion connected between the first connection portion and the second connection portion, wherein the first connection portion is arranged in the shell and is electrically connected to the circuit board, the second connection portion is used to be electrically connected to the terminal of the contactor, and the intermediate portion is located outside the shell and confined in the groove.

[0011] As an optional solution, a plug-in boss is provided at a position on the shell corresponding to the extension portion, and a first plug-in interface is provided in the middle portion, and the plug-in boss is plugged into the first plug-in interface.

[0012] As an optional solution, the plug-in boss includes a main body portion and a protruding portion which are connected to each other, the main body portion is connected to the shell, and the main body portion is used to abut the middle portion, and the protruding portion is plugged into the first plug port.

[0013] As an optional solution, a second plug-in interface communicating with the groove is provided on the extension portion, and the plug-in boss is plugged into the first plug-in interface and the second plug-in interface in sequence.

[0014] As an optional solution, the extension portion is provided with limiting bosses on two opposite inner side surfaces in the groove, and the middle portion is arranged in the groove and limited between the groove bottom and the two limiting bosses.

[0015] As an optional solution, two opposite inner side surfaces in the shell are provided with supporting bosses, and the opposite sides of the two supporting bosses are provided with steps. The sides of the circuit board corresponding to the two supporting bosses are provided with first limiting grooves, the circuit board is supported on the steps on both sides, and the two supporting bosses are respectively limited in the two first limiting grooves.

[0016] As an optional solution, the circuit board is provided with a connection hole corresponding to the first connection portion, and the first connection portion is inserted into the connection hole and fixed to the circuit board by welding.

[0017] As an optional solution, the shell has two outer side surfaces along the first direction and are provided with clamping parts, the end cover has two sides along the first direction and are provided with clamping plates, the clamping plates are provided with clamping holes, and the clamping parts and the clamping holes are clamped with each other.

[0018] As an optional solution, the two outer side surfaces of the shell along the first direction are both provided with second limiting grooves, the bottom of the second limiting groove is protruding with the clamping part, and the two clamping plates are respectively limited in the two second limiting grooves.

[0019] As an optional scheme, a hook and a first sliding portion extending along the second direction are provided on the side of the shell facing the second connecting portion, and first sliding grooves are provided on both sides of the first sliding portion along the first direction; a slot and two second sliding portions spaced apart along the first direction are provided on the side of the shell corresponding to the first sliding portion, the second sliding portion extends along the second direction, and second slots are provided on opposite sides of the two second sliding portions, the first slot and the second slot are slidably connected, and the hook can be engaged in the slot.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a surge suppressor, which is provided with an extension portion on the end cover so that when the surge suppressor is installed on the contactor, the extension portion can support the middle portion of the metal terminal board, which makes assembly more convenient and improves assembly efficiency; a groove is provided on the side of the extension portion facing the contactor, and the middle portion is limited to be located in the groove, so that the metal terminal board can be accurately positioned, so that the second connecting portion can be directly opposite to the terminal of the contactor, and the assembly efficiency is further improved; and the middle portion is limited to be located in the groove, which can effectively protect the metal terminal board, prevent it from being exposed and weathered, and improve its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded diagram of a surge suppressor provided by an embodiment of the utility model;

[0023] Figure 2 It is an assembly diagram of a surge suppressor provided by an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of a surge suppressor and a contactor provided in an embodiment of the utility model;

[0025] Figure 4 It is a structural schematic diagram of a circuit board involved in an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of a metal terminal board involved in an embodiment of the utility model.

[0027] In the figure:

[0028] 100, contactor; 101, housing; 1011, slot; 1012, second sliding portion; 1013, window;

[0029] 1. housing; 11. plug-in boss; 111. main body; 112. raised portion; 12. supporting boss; 121. step; 13. second limiting groove; 131. clamping portion; 14. hook; 15. first sliding portion; 151. first sliding groove;

[0030] 2. end cover; 21. extension portion; 211. groove; 212. second plug interface; 213. limiting boss; 22. snap-on plate; 221. snap-on hole;

[0031] 3. Circuit board; 31. First limiting groove; 32. Connection hole;

[0032] 4. Metal wiring board; 41. First connecting portion; 42. Second connecting portion; 43. Middle portion; 431. First plug interface. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] 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 or a detachable 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.

[0035] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being 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 the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0037] The embodiment of the utility model provides a surge suppressor, which is arranged on a contactor 100 and is used to protect a control circuit of the contactor 100 .

[0038] like Figure 1-Figure 5As shown, the surge suppressor includes a shell 1, an end cover 2, a circuit board 3 and a metal terminal board 4, wherein the shell 1 is connected to the shell 101 of the contactor 100; the circuit board 3 (PCB circuit board) is arranged in the shell 1, the end cover 2 is used to cover the shell 1, and the end cover 2 is provided with an extension portion 21. When the surge suppressor is assembled on the contactor 100, the extension portion 21 is arranged in parallel with the shell 101 of the contactor 100, and the side of the extension portion 21 facing the shell 101 of the contactor 100 is provided with a groove 211 connected to the inside of the shell 1; the metal terminal board 4 includes an integrally formed first connecting portion 41, a second connecting portion 42 and a middle portion 43 connected to the first connecting portion 41 and the second connecting portion 42, the first connecting portion 41 is arranged in the shell 1 and is electrically connected to the circuit board 3, the second connecting portion 42 is used to be electrically connected to the terminal of the contactor 100, and the middle portion 43 is located outside the shell 1 and limited in the groove 211.

[0039] The surge suppressor is provided with an extension portion 21 on the end cover 2, so that when the surge suppressor is installed on the contactor 100, the extension portion 21 can support the middle portion 43 of the metal terminal plate 4, which makes assembly more convenient and improves assembly efficiency; a groove 211 is provided on the side of the extension portion 21 facing the contactor 100, and the middle portion 43 is limited in the groove 211, so that the metal terminal plate 4 can be accurately positioned, so that the second connecting portion 42 can be directly opposite to the terminal of the contactor 100, further improving assembly efficiency; and the middle portion 43 is limited in the groove 211, which can effectively protect the metal terminal plate 4, prevent it from being exposed and weathered, and improve its service life.

[0040] Optionally, a plug-in boss 11 is provided at a position on the shell 1 corresponding to the extension portion 21, and a first plug-in port 431 is provided in the middle portion 43. When the middle portion 43 is limited in the groove 211, the plug-in boss 11 can be plugged into the first plug-in port 431 to make the installation position of the metal terminal block 4 more accurate and prevent the metal terminal block 4 from shaking in the groove 211.

[0041] Furthermore, the plug-in boss 11 includes a main body portion 111 and a raised portion 112 that are connected to each other. The main body portion 111 is connected to the shell 1. When the middle portion 43 is limited in the groove 211, the main body portion 111 can abut against the middle portion 43, and the raised portion 112 is plugged into the first plug-in port 431. The main body portion 111 can press the middle portion 43 against the bottom of the groove 211 to make the metal terminal block 4 more stable.

[0042] The housing 1 and the plug-in boss 11 are an integrated structure.

[0043] In order to facilitate the assemblers to check whether the protrusion 112 is accurately inserted into the first plug-in port 431, a second plug-in port 212 connected to the groove 211 is provided on the extension portion 21, and the protrusion 112 of the plug-in boss 11 can be plugged into the first plug-in port 431 and the second plug-in port 212 in sequence. The protrusion 112 can only be plugged and matched with the second plug-in port 212 when it is inserted into the first plug-in port 431. Therefore, when the protrusion 112 is plugged into the second plug-in port 212, the protrusion 112 is inserted into the first plug-in port 431.

[0044] In this embodiment, two metal terminal blocks 4 are provided, and two extension portions 21 are provided on the end surface of the end cover 2 facing away from the shell body 1, and the two extension portions 21 are spaced apart along the first direction (i.e., the X-axis direction). The two metal terminal blocks 4 are spaced apart along the first direction, and the middle portions 43 of the two metal terminal blocks 4 are respectively limited in the grooves 211 of the two extension portions 21, and two plug-in bosses 11 spaced apart along the first direction are provided on the shell body 1, and the protrusions 112 of the two plug-in bosses 11 are respectively plugged into the first plug-in ports 431 of the middle portions 43 of the two metal terminal blocks 4, and the two second connection portions 42 of the metal terminal blocks 4 are respectively plugged and electrically connected to the two terminal blocks of the contactor 100.

[0045] In order to further improve the installation stability of the metal terminal plate 4, as Figure 1 Combined with Figure 2 As shown, the two opposite inner side surfaces of the extension portion 21 in the groove 211 are both provided with limiting bosses 213 , and the middle portion 43 is disposed in the groove 211 and limited between the groove bottom of the groove 211 and the limiting bosses 213 .

[0046] Refer to Figure 1 Two opposite inner side surfaces of the shell 1 are provided with supporting bosses 12, and the opposite sides of the two supporting bosses 12 are provided with steps 121. The side surfaces of the circuit board 3 corresponding to the two supporting bosses 12 are provided with first limiting grooves 31. The circuit board 3 is supported on the steps 121 on both sides, and the two supporting bosses 12 are respectively limited in the two first limiting grooves 31 to prevent the circuit board 3 from shaking.

[0047] In order to enhance the electrical connection firmness between the metal wiring board 4 and the circuit board 3, two groups of connection holes 32 are provided on the circuit board 3. The two groups of connection holes 32 are spaced apart along the first direction. The first connection parts 41 of the two metal wiring boards 4 are respectively inserted into the two groups of connection holes 32 and are welded and fixed to the circuit board 3.

[0048] Specifically, Figure 4-Figure 5 As shown, the first connection portion 41 is configured to be U-shaped, each group of connection holes 32 includes two connection holes 32 , and the U-shaped fork of each U-shaped first connection portion 41 can be inserted into the two connection holes 32 in each group of connection holes 32 .

[0049] The second connection portion 42 is also set to be U-shaped, and the U-shaped second connection portion 42 is used to be plugged into the connection terminal of the contactor 100. Specifically, the housing 101 of the contactor 100 is provided with two windows 1013, and the two connection terminals are respectively arranged in the two windows 1013. The U-shaped second connection portions 42 of the two metal terminal plates 4 are respectively plugged into the two connection terminals through the two windows 1013.

[0050] In order to facilitate the installation of the end cover 2 and the housing 1, refer to Figure 1 The shell 1 is provided with a clamping portion 131 on both outer side surfaces along the first direction, and the end cover 2 is provided with a clamping plate 22 on both sides along the first direction. The two clamping plates 22 are provided with a clamping hole 221. When the end cover 2 covers the shell 1, the two clamping portions 131 on the shell 1 can be respectively clamped in the clamping holes 221 of the two clamping plates 22.

[0051] Furthermore, the second limiting grooves 13 are provided on both outer sides of the housing 1 along the first direction, and the bottom of the second limiting grooves 13 is provided with a clamping portion 131. When the end cover 2 is covered on the housing 1, the clamping plates 22 on both sides of the end cover 2 are limited in the two second limiting grooves 13, and the clamping portion 131 is clamped in the clamping hole 221. This structure makes the installation of the end cover 2 and the housing 1 more convenient and more secure.

[0052] The housing 101 of the contactor 100 is provided with an installation space, and the housing 1 is installed in the installation space. Figure 3 Combined with Figure 1 As shown, a hook 14 and a first sliding portion 15 are provided on the side of the shell 1 facing the second connecting portion 42, the first sliding portion 15 extends along the second direction (i.e., the Y-axis direction), and first slide grooves 151 are provided on both sides of the first sliding portion 15 along the first direction, and a slot 1011 and two second sliding portions 1012 spaced apart along the first direction are provided on the side of the shell 101 corresponding to the first sliding portion 15 in the installation space, each second sliding portion 1012 extends along the first direction, and second slide grooves are provided on the opposite sides of the two second sliding portions 1012, the surge suppressor is inserted into the installation space along the second direction, the two first slide grooves 151 on the first sliding portion 15 can be slidably connected with the second slide grooves on the two second sliding portions 1012 respectively, and when the surge suppressor is in place, the hook 14 is engaged with the slot 1011 to enable the surge suppressor to be engaged with the contactor 100.

[0053] Specifically, the hook 14 is disposed in the middle of the first sliding portion 15 , and there is a gap between the hook 14 and the side surface of the housing 1 . When the hook 14 is engaged with the engagement slot 1011 , the hook 14 can be flexibly bent to facilitate engagement.

[0054] The hook 14 has an inclined surface on one side facing the housing 101 of the contactor 100 , and an arc surface on one side facing away from the housing 1 , so that the hook 14 can be smoothly engaged with the slot 1011 .

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. 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 protection scope of the claims of the present invention.

Claims

1. A surge suppressor, arranged on a contactor (100), characterized in that: The surge suppressor comprises: A housing (1) connected to a casing (101) of the contactor (100); an end cover (2) for sealing the shell (1), wherein the end cover (2) is provided with an extension portion (21), and a groove (211) communicating with the interior of the shell (1) is provided on a side of the extension portion (21) facing the outer shell (101); A circuit board (3) is arranged in the housing (1); A metal terminal block (4) comprises an integrally formed first connection portion (41), a second connection portion (42) and an intermediate portion (43) connected between the first connection portion (41) and the second connection portion (42), wherein the first connection portion (41) is arranged in the housing (1) and is electrically connected to the circuit board (3), the second connection portion (42) is used to be electrically connected to a terminal of the contactor (100), and the intermediate portion (43) is located outside the housing (1) and is confined within the groove (211).

2. The surge suppressor according to claim 1, characterized in that: A plug-in boss (11) is provided at a position on the shell (1) corresponding to the extension portion (21), and a first plug-in port (431) is provided on the middle portion (43), and the plug-in boss (11) is plugged into the first plug-in port (431).

3. The surge suppressor according to claim 2, characterized in that: The plug-in boss (11) comprises a main body (111) and a raised portion (112) which are connected to each other, the main body (111) being connected to the housing (1), and the main body (111) being used to abut against the middle portion (43), and the raised portion (112) being plugged into the first plug port (431).

4. The surge suppressor according to claim 2, characterized in that: The extension portion (21) is provided with a second plugging port (212) connected to the groove (211), and the plugging boss (11) is plugged into the first plugging port (431) and the second plugging port (212) in sequence.

5. The surge suppressor according to claim 1, characterized in that: The extension portion (21) is provided with limiting bosses (213) on two opposite inner side surfaces in the groove (211); the middle portion (43) is arranged in the groove (211) and is limited between the groove bottom of the groove (211) and the two limiting bosses (213).

6. The surge suppressor according to claim 1, characterized in that: Two opposing inner side surfaces in the shell (1) are each provided with a supporting boss (12), and opposite sides of the two supporting bosses (12) are each provided with a step (121). Side surfaces of the circuit board (3) corresponding to the two supporting bosses (12) are each provided with a first limiting groove (31), the circuit board (3) is supported on the steps (121) on both sides, and the two supporting bosses (12) are respectively limited in the two first limiting grooves (31).

7. The surge suppressor according to claim 1, characterized in that: The circuit board (3) is provided with a connection hole (32) corresponding to the first connection portion (41); the first connection portion (41) is inserted into the connection hole (32) and is fixed to the circuit board (3) by welding.

8. The surge suppressor according to claim 1, characterized in that: The housing (1) is provided with a clamping portion (131) on both outer side surfaces along the first direction, the end cover (2) is provided with a clamping plate (22) on both sides along the first direction, the clamping plate (22) is provided with a clamping hole (221), and the clamping portion (131) and the clamping hole (221) are mutually clamped.

9. The surge suppressor according to claim 8, characterized in that: The housing (1) is provided with second limiting grooves (13) on both outer side surfaces along the first direction, the bottom of the second limiting groove (13) is provided with the clamping portion (131) protrudingly, and the two clamping plates (22) are respectively limited in the two second limiting grooves (13).

10. The surge suppressor according to claim 1, characterized in that: The shell (1) is provided with a hook (14) and a first sliding portion (15) extending along the second direction on the side facing the second connecting portion (42); the first sliding portion (15) is provided with first sliding grooves (151) on both sides along the first direction; the shell (101) is provided with a slot (1011) and two second sliding portions (1012) spaced apart along the first direction on the side corresponding to the first sliding portion (15); the second sliding portion (1012) extends along the second direction, and the two second sliding portions (1012) are provided with second sliding grooves on opposite sides; the first sliding groove (151) and the second sliding groove are slidably connected, and the hook (14) can be engaged in the slot (1011).

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