Circuit board installation structure and low voltage electrical appliances

Abstract

The utility model relates to the technical field of low-voltage electrical appliances, and discloses a circuit board installation structure and a low-voltage electrical appliance. The low-voltage electrical appliance includes a circuit board installation structure, which includes a base, a first plug-in board, a second plug-in board and a circuit board. The first plug-in board and the second plug-in board are arranged at intervals along a first direction and are respectively inserted into the base along a second direction, and form a glue cavity with the base. The circuit board includes a circuit board body, a wiring piece and a lead. The circuit board body is at least partially arranged in the glue cavity. The wiring piece is led out from between the first plug-in board and the base to the outside of the glue cavity. The lead is led out from between the second plug-in board and the base to the outside of the glue cavity. The glue cavity is filled with glue. The above-mentioned circuit board installation structure can prevent the circuit board from getting damp, prevent the wiring piece or the lead from being disconnected from the circuit board body, and prevent dust deposition from causing the components on the circuit board to fail to work properly. By adopting the above-mentioned circuit board installation structure, the low-voltage electrical appliance is not easy to be damaged and has a long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a circuit board installation structure and a low-voltage electrical appliance. Background Art

[0002] Low-voltage electrical appliances are components or devices that can manually or automatically connect or disconnect circuits according to external signals and requirements to achieve switching, control, protection, detection, transformation and adjustment of circuits or non-electrical objects. Among them, circuit breakers and contactors are commonly used low-voltage electrical appliances.

[0003] Contactors or circuit breakers usually include a housing and a circuit board. Currently, the circuit board is directly assembled in the housing. This method has a poor protection effect on the circuit board, which can easily cause the electrical components on the circuit board to get damp, the connection between the circuit board body and the wiring piece or lead to break due to vibration during the test, and dust accumulation causing the electrical components to not work properly, thus affecting the service life of the product.

[0004] Therefore, there is an urgent need for a circuit board installation structure and a low-voltage electrical appliance to solve the above technical problems. Utility Model Content

[0005] One purpose of the utility model is to provide a circuit board installation structure, which can prevent the circuit board from getting damp, prevent the wiring piece or lead from being disconnected from the circuit board body, and prevent dust deposition from causing components on the circuit board to malfunction.

[0006] Another object of the utility model is to provide a low-voltage electrical appliance which is not easily damaged and has a long service life by adopting the above-mentioned circuit board installation structure.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] Circuit board mounting structure, including:

[0009] Base;

[0010] The first plug-in plate and the second plug-in plate are arranged at intervals along the first direction and are respectively inserted into the base along the second direction, and are surrounded by the base to form a glue-containing cavity;

[0011] The circuit board comprises a circuit board body and wiring pieces and leads respectively connected to the circuit board body, wherein the circuit board body is at least partially arranged in the glue-containing cavity, the wiring pieces are led out from between the first plug-in board and the base to the outside of the glue-containing cavity, the leads are led out from between the second plug-in board and the base to the outside of the glue-containing cavity, and the glue-containing cavity is filled with glue.

[0012] As an optional scheme, the base forms an installation cavity with an opening on one side, and a first limiting rib group is arranged on the inner wall of the installation cavity. The first plug plate includes a first main body plate and a first convex rib portion arranged on the side of the first main body plate away from the glue containing cavity. The first convex rib portion and the first main body plate are arranged to form a first slot group, and the first slot group is plugged into and matched with the first limiting rib group.

[0013] As an optional solution, the base includes a bottom plate and a side plate arranged around the outer periphery of the bottom plate, the first limiting rib group includes a first rib, a second rib and a third rib arranged at intervals along the third direction, the first rib and the third rib are both formed at the intersection of the bottom plate and the side plate and are arranged opposite to each other, and the second rib is arranged between the first rib and the third rib;

[0014] The first slot group includes a first slot, a second slot and a third slot arranged at intervals along the third direction, the first slot is provided with openings at one end along the second direction and one end along the third direction and is plugged into and matched with the first rib, the second slot is provided with an opening at one end along the second direction and is plugged into and matched with the second rib, and the third slot is provided with openings at one end along the second direction and one end along the third direction and is plugged into and matched with the third rib.

[0015] As an optional solution, the base includes a bottom plate, a first wire passing groove is arranged on the bottom plate, a first wire pressing portion is protruded from one end of the first plug plate close to the bottom plate along the second direction, the first wire pressing portion is inserted into the first wire passing groove, and the wiring piece is pressed against the bottom of the first wire passing groove.

[0016] As an optional solution, a guide groove is provided at the bottom of the first plug plate on the side facing away from the glue containing cavity, the wiring piece includes a U-shaped portion, the U-shaped portion includes a first section, a second section and a third section connected in sequence, the first section is located in the glue containing cavity, the second section is arranged in the first wire passing groove, and the third section is limited to the guide groove.

[0017] As an optional solution, the base forms an installation cavity with an opening on one side, and a second limiting rib group is arranged on the inner wall of the installation cavity. The second plug-in plate includes a second main body plate and a second convex rib portion arranged on the side of the second main body plate facing away from the glue-containing cavity. The second convex rib portion and the second main body plate are arranged to form a second slot group, and the second slot group is plugged into and matched with the second limiting rib group.

[0018] As an optional solution, the base includes a bottom plate and a side plate, the second limiting rib assembly includes a fourth rib, a fifth rib and a sixth rib arranged at intervals along the third direction, the fourth rib and the sixth rib are both formed at the intersection of the bottom plate and the side plate and are arranged opposite to each other, and the fifth rib is arranged between the fourth rib and the sixth rib;

[0019] The second slot group includes a fourth slot, a fifth slot and a sixth slot arranged at intervals along the third direction, the fourth slot is provided with openings at one end along the second direction and one end along the third direction and is plugged into and matched with the fourth rib, the fifth slot is provided with an opening at one end along the second direction and is plugged into and matched with the fifth rib, and the sixth slot is provided with openings at one end along the second direction and one end along the third direction and is plugged into and matched with the sixth rib.

[0020] As an optional solution, the base includes a bottom plate, a second wire groove is provided on the bottom plate, a second wire pressing portion is protruded from the bottom of the second plug plate, the second wire pressing portion is plugged into the second wire groove, and the lead wire is pressed against the bottom of the second wire groove;

[0021] A positioning groove is provided on the surface of the second wire pressing portion facing the second wire passing groove, and the lead wire is plugged into and matched with the positioning groove.

[0022] As an optional solution, the base includes a bottom plate and a side plate arranged around the outer periphery of the bottom plate, the side plate is provided with an insertion slot, and the circuit board body is inserted into the insertion slot.

[0023] A low-voltage electrical appliance comprises the circuit board mounting structure, and the low-voltage electrical appliance is a contactor or a circuit breaker.

[0024] The beneficial effects of the utility model are:

[0025] The circuit board installation structure of the utility model can first fix the circuit board on the base during installation, and then insert the first plug board and the second plug board on the base respectively. At this time, not only is at least part of the circuit board accommodated in the glue cavity, but also the wiring piece and the lead wire are respectively led out of the glue cavity from between the first plug board and the base, and between the second plug board and the base, and finally the glue cavity is filled with glue to fix. The filled glue encapsulates the connection positions of the electrical components, wiring pieces and leads on the circuit board and the circuit board respectively, so as to prevent the circuit board from getting damp, the wiring pieces or leads from being disconnected from the main body of the circuit board, and dust deposition from causing the components on the circuit board to fail to work properly.

[0026] The low-voltage electrical appliance of the utility model is not easy to be damaged and has a long service life by adopting the circuit board installation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the circuit board installation structure provided by the specific embodiment of the utility model when no glue is poured;

[0028] Figure 2 yes Figure 1 A top view of the structure in the middle;

[0029] Figure 3 It is a structural schematic diagram of a base provided by a specific embodiment of the utility model;

[0030] Figure 4 It is a structural schematic diagram of a circuit board provided by a specific embodiment of the utility model;

[0031] Figure 5 yes Figure 2 AA section view in;

[0032] Figure 6 It is a structural schematic diagram of the first plugboard provided by a specific embodiment of the utility model at a viewing angle;

[0033] Figure 7 It is a structural schematic diagram of the first plugboard provided by a specific embodiment of the utility model at another viewing angle;

[0034] Figure 8 It is a structural schematic diagram of a first plug board and a circuit board in a matching state provided by a specific embodiment of the utility model;

[0035] Fig. 9 It is a structural schematic diagram of a second plugboard provided in a specific embodiment of the utility model;

[0036] Fig.10 yes Figure 2 BB section view in;

[0037] Fig.11 It is a structural schematic diagram of the second plug board and the circuit board in the matching state provided by the specific implementation mode of the utility model.

[0038] In the figure:

[0039] 10. Base; 11. Bottom plate; 111. First wire groove; 112. Second wire groove; 12. Side plate; 121. Insertion slot; 13. First position-limiting rib group; 131. First rib; 132. Second rib; 133. Third rib; 14. Second position-limiting rib group; 141. Fourth rib; 142. Fifth rib; 143. Sixth rib;

[0040] 20. First plug board; 21. First main body board; 22. First convex rib portion; 221. First transverse rib; 222. First vertical rib; 23. First slot group; 231. First slot; 232. Second slot; 233. Third slot; 24. Guide slot; 25. First wire pressing portion;

[0041] 30. second plug board; 31. second main body board; 32. second convex rib portion; 321. second transverse rib; 322. second vertical rib; 33. second slot group; 331. fourth slot; 332. fifth slot; 333. sixth slot; 34. second wire pressing portion; 341. positioning slot;

[0042] 40. Circuit board; 41. Circuit board body; 42. Wiring piece; 421. U-shaped portion; 4211. First section; 4212. Second section; 4213. Third section; 43. Lead wire;

[0043] 50. Glue chamber. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions 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.

[0048] The present embodiment provides a circuit board mounting structure and a low-voltage electrical appliance, and the low-voltage electrical appliance includes a circuit board mounting structure. Optionally, the low-voltage electrical appliance may be a contactor or a circuit breaker. If the low-voltage electrical appliance is a circuit breaker, the low-voltage electrical appliance also includes necessary structures of the circuit breaker such as an operating mechanism, a contact mechanism, an arc extinguishing mechanism, and an overcurrent protection mechanism. Without violating the inventive concept of the present application, these mechanisms may be any of the existing ones. If the low-voltage electrical appliance is a contactor, the low-voltage electrical appliance also includes necessary structures of the contactor such as an electromagnetic system, a contact system, and an arc extinguishing system. Without violating the inventive concept of the present application, these systems may be any of the existing ones. The following is an example in which the low-voltage electrical appliance is a contactor.

[0049] like Figure 1 As shown, the first direction, the second direction and the third direction are defined as three directions perpendicular to each other in space, and the circuit board mounting structure includes a base 10, a first plug board 20, a second plug board 30 and a circuit board 40. The base 10 includes a bottom plate 11 and a side plate 12 arranged around the outer periphery of the bottom wall, thereby forming an installation cavity with an opening at one end in the second direction, and other structures of the low-voltage electrical appliance can be installed in the base 10 from the opening. The first plug board 20 and the second plug board 30 are spaced apart along the first direction, and the first plug board 20 and the second plug board 30 can be respectively inserted into the base 10 from the opening of the installation cavity along the second direction. The first plug board 20, the second plug board 30 and the base 10 are arranged to form a glue-containing cavity 50. As shown Figure 2 As shown, the circuit board 40 includes a circuit board body 41, a wiring piece 42 and a lead 43. The circuit board body 41 is arranged substantially perpendicular to the first direction and has electrical components arranged thereon. The wiring piece 42 and the lead 43 are respectively connected to both sides of the circuit board body 41. The wiring piece 42 is led out from between the first plug board 20 and the base 10 to the outside of the glue cavity 50, so as to facilitate connection with the wiring terminal of the low-voltage electrical appliance. The lead 43 is led out from between the second plug board 30 and the base 10 to the outside of the glue cavity 50, so as to facilitate connection with the electromagnetic system of the low-voltage electrical appliance. The glue cavity 50 is filled with glue.

[0050] When installing the circuit board 40, the circuit board 40 can be first fixed on the base 10, and then the first plug board 20 and the second plug board 30 are respectively inserted on the base 10, and the first plug board 20 and the second plug board 30 are respectively located on both sides of the circuit board body 41 in the first direction. At this time, not only is at least part of the circuit board 40 accommodated in the glue cavity 50, but also the wiring piece 42 and the lead 43 are respectively led out of the glue cavity 50 from between the first plug board 20 and the base 10 and between the second plug board 30 and the base 10, and finally the glue cavity 50 is filled with glue to fix it. The filled glue encapsulates the connection positions of the electrical components, wiring pieces 42 and leads 43 on the circuit board 40 and the circuit board 40, so as to prevent the circuit board 40 from getting damp, prevent the wiring piece 42 or the lead 43 from being disconnected from the circuit board body 41, and prevent dust deposition from causing the components on the circuit board 40 to fail to work normally. The low-voltage electrical appliance of this embodiment adopts the above-mentioned circuit board installation structure, which is not easy to be damaged and has a long service life.

[0051] It should be noted that the depth of the glue filled in the glue cavity 50 (ie, the dimension in the second direction) is smaller than the smaller height of the first plug board 20 and the second plug board 30 in the second direction, so as to prevent the glue from overflowing from the glue cavity 50 .

[0052] like Figure 1-Figure 3 As shown, the side plate 12 of the base 10 is provided with an insertion slot 121, and the insertion slot 121 extends along the second direction. The circuit board body 41 is plugged into the insertion slot 121, so as to realize the preliminary positioning and installation of the circuit board 40 and the base 10. After the glue is filled in the glue cavity 50, the relative position of the circuit board 40 and the base 10 is completely locked. In this embodiment, the two side walls of the side plate 12 perpendicular to the third direction are provided with insertion slots 121, and the two ends of the circuit board body 41 along the third direction are respectively matched with the two insertion slots 121. Of course, in some embodiments, the bottom plate 11 of the base 10 can also be provided with an insertion slot (not shown), and the insertion slot on the bottom plate 11 can be plugged and matched with the lower end of the circuit board body 41, so as to further improve the matching accuracy between the circuit board body 41 and the base 10.

[0053] like Figure 3-Figure 7As shown, a first limiting rib group 13 is arranged on the inner wall of the base 10, and the first plug-in plate 20 includes a first main body plate 21 and a first convex rib portion 22. The first convex rib portion 22 is arranged on the side of the first main body plate 21 away from the glue-containing cavity 50. The first convex rib portion 22 and the first main body plate 21 are surrounded to form a first slot group 23, and the first slot group 23 is plugged and matched with the first limiting rib group 13. On the one hand, the cooperation between the first slot group 23 and the first limiting rib group 13 realizes the plug-in connection between the first plug-in plate 20 and the base 10; on the other hand, the first convex rib portion 22 is arranged on the side of the first main body plate 21 away from the glue-containing cavity 50, so that the first main body plate 21 isolates the glue in the glue-containing cavity 50 from the matching gap between the first plug-in plate 20 and the base 10, and the side wall of the first main body plate 21 away from the glue-containing cavity 50 forms a sealing surface as a whole, thereby improving the sealing of the glue-containing cavity 50 and avoiding glue overflow.

[0054] like Figure 3 As shown, the first limiting rib group 13 includes a first rib 131, a second rib 132 and a third rib 133 which are spaced apart along the third direction. The first rib 131 and the third rib 133 are both formed at the intersection of the bottom plate 11 and the side plate 12. The first rib 131 and the third rib 133 are arranged opposite to each other, and the second rib 132 is arranged between the first rib 131 and the third rib 133. In other words, one end of the first rib 131 along the third direction is connected to the corresponding position of the side plate 12, and is connected to the bottom plate 11 along the second direction. The second rib 132 is connected to the bottom plate 11 only at the lower end along the second direction. One end of the third rib 133 along the third direction is connected to the corresponding position of the side plate 12, and the lower end along the second direction is connected to the bottom plate 11. As shown Figure 4 and Figure 5 As shown, the first slot group 23 includes a first slot 231, a second slot 232 and a third slot 233 arranged at intervals along the third direction. The first slot 231 is provided with an opening at one end along the second direction and at one end along the third direction and is plugged and matched with the first rib 131. The second slot 232 is provided with an opening at one end along the second direction and is plugged and matched with the second rib 132. The third slot 233 is provided with an opening at one end along the second direction and at one end along the third direction and is plugged and matched with the third rib 133. The above arrangement makes the cooperation between the first slot 231 and the first rib 131, the cooperation between the second slot 232 and the second rib 132, and the cooperation between the third slot 233 and the third rib 133 all include a vertical cooperation section extending along the second direction and a horizontal cooperation section extending along the third direction, which can not only further improve the sealing of the glue-containing cavity 50, but also the first rib 131, the second rib 132 and the third rib 133 play a role in supporting and strengthening the first plugboard 20, thereby improving the overall structural strength of the low-voltage electrical appliance.

[0055] In this embodiment, Figure 5As shown, the first convex rib portion 22 includes a first transverse rib 221 and two first vertical ribs 222, wherein the first transverse rib 221 extends along the third direction and is arranged at the end of the first plug plate 20 away from the bottom plate 11, and the two first vertical ribs 222 are arranged in parallel and both extend along the second direction. A second groove 232 is formed between the two first vertical ribs 222 facing each other, the corresponding parts of the first transverse rib 221, and the corresponding parts of the first main body plate 21. A first groove 231 and a third groove 233 are respectively formed between the two first vertical ribs 222 facing each other, the corresponding parts of the first transverse rib 221, and the corresponding parts of the first main body plate 21. As shown Figure 7 As shown, an insertion gap is formed between the first rib 131 and the second rib 132, and an insertion gap is also formed between the second rib 132 and the third rib 133. The two first vertical ribs 222 are respectively inserted between the first rib 131 and the second rib 132, and between the second rib 132 and the third rib 133. In other words, the first limiting rib group 13 and the first plug plate 20 form a mutually inserted structure, which further improves the sealing of the glue chamber 50 and avoids the problem of glue overflow.

[0056] like Figure 3-Figure 4 , Figure 7-Figure 8 As shown, a first wire-passing groove 111 is provided on the bottom plate 11, and a first wire-pressing portion 25 is convexly provided at one end of the first plug-in board 20 close to the bottom plate 11 along the second direction. The first wire-pressing portion 25 is plugged into the first wire-passing groove 111, and the terminal piece 42 is pressed against the bottom of the first wire-passing groove 111. The lead-out position of the terminal piece 42 is further sealed by the cooperation between the first wire-pressing portion 25 and the first wire-passing groove 111, thereby improving the sealing of the glue-containing cavity 50 and avoiding the problem of glue overflow. In this embodiment, the circuit board 40 includes two terminal pieces 42, so two first wire-passing grooves 111 are provided on the bottom plate 11, and two first wire-pressing portions 25 are correspondingly provided at the bottom of the first plug-in board 20. In this embodiment, the two first wire-passing grooves 111 are respectively provided between the first rib 131 and the second rib 132, and between the second rib 132 and the third rib 133. The two first wire pressing parts 25 are correspondingly arranged below the two first vertical ribs 222. Since the thickness of the first plug board 20 at the first vertical ribs 222 is relatively large, the total length of the first wire pressing parts 25 along the first direction can be set longer, thereby further improving the sealing performance at the lead-out position of the wiring piece 42.

[0057] like Figure 5 As shown, a guide groove 24 is provided at the bottom of the first plug board 20 on the side away from the glue containing cavity 50. Figure 2 As shown, the terminal piece 42 includes a U-shaped portion 421, and the U-shaped portion 421 includes a first section 4211, a second section 4212 and a third section 4213 connected in sequence. The first section 4211 is located in the resin cavity 50 and its end is connected to the circuit board body 41, and the second section 4212 is disposed in the first wire groove 111. Figure 8As shown, the third section 4213 is limited in the guide groove 24. By providing the guide groove 24 on the side of the first plug board 20 away from the glue containing cavity 50, not only can the third section 4213 of the wiring piece 42 be accommodated and limited, but also it can be used as a mark when the first plug board 20 is assembled to prevent the first plug board 20 from being installed upside down. In this embodiment, two guide grooves 24 are provided, and they are respectively opened on the side walls of the two first vertical ribs 222 to correspond to and limit the third sections 4213 of the two wiring pieces 42.

[0058] like Figure 3 , Figure 9-10 As shown, a second limiting rib group 14 is arranged on the inner wall of the base 10, and the second plug-in plate 30 includes a second main body plate 31 and a second convex rib portion 32 arranged on the side of the second main body plate 31 away from the glue-containing cavity 50. The second convex rib portion 32 and the second main body plate 31 are surrounded to form a second slot group 33, and the second slot group 33 is plugged and matched with the second limiting rib group 14. On the one hand, the cooperation between the second slot group 33 and the second limiting rib group 14 realizes the plug-in connection between the second plug-in plate 30 and the base 10; on the other hand, the second convex rib portion 32 is arranged on the side of the second main body plate 31 away from the glue-containing cavity 50, so that the second main body plate 31 isolates the glue in the glue-containing cavity 50 from the matching gap between the second plug-in plate 30 and the base 10, and the side wall of the second main body plate 31 on the side away from the glue-containing cavity 50 forms a sealing surface as a whole, thereby improving the sealing of the glue-containing cavity 50 and avoiding glue overflow.

[0059] like Figure 3 As shown, the second limiting rib group 14 includes a fourth rib 141, a fifth rib 142 and a sixth rib 143 which are spaced apart along the third direction. The fourth rib 141 and the sixth rib 143 are both formed at the intersection of the bottom plate 11 and the side plate 12. The fourth rib 141 and the sixth rib 143 are arranged opposite to each other, and the fifth rib 142 is arranged between the fourth rib 141 and the sixth rib 143. In other words, one end of the fourth rib 141 along the third direction is connected to the corresponding position of the side plate 12 of the base 10, and one end along the second direction is connected to the bottom plate 11. The lower end of the fifth rib 142 along the second direction is connected to the bottom plate 11. One end of the sixth rib 143 along the third direction is connected to the corresponding position of the side plate 12, and the lower end along the second direction is connected to the bottom plate 11. As shown Fig. 9As shown, the second slot group 33 includes a fourth slot 331, a fifth slot 332 and a sixth slot 333 arranged at intervals along the third direction, the fourth slot 331 is provided with an opening at one end along the second direction and at one end along the third direction and is plugged and matched with the fourth rib 141, the fifth slot 332 is provided with an opening at one end along the second direction and is plugged and matched with the fifth rib 142, and the sixth slot 333 is provided with an opening at one end along the second direction and at one end along the third direction and is plugged and matched with the sixth rib 143. The above arrangement makes the cooperation between the fourth slot 331 and the fourth rib 141, the cooperation between the fifth slot 332 and the fifth rib 142, and the cooperation between the sixth slot 333 and the sixth rib 143 include a vertical cooperation section extending along the second direction and a horizontal cooperation section extending along the third direction, which can not only further improve the sealing of the glue-containing cavity 50, but also the third rib 133, the fourth rib 141 and the fifth rib 142 play a role in supporting and strengthening the second plugboard 30, thereby improving the overall structural strength of the low-voltage electrical appliance.

[0060] like Figure 3 As shown, the top of the side opposite to the fourth rib 141 and the fifth rib 142, the top of the side opposite to the fourth rib 141 and the sixth rib 143, and the top of the side opposite to the fifth rib 143 and the fifth rib 142 are all set to be rounded. When installing the circuit board 40, the rounded structure can avoid the lead 43 to prevent damage to the lead 43.

[0061] In this embodiment, Fig. 9 As shown, the second convex rib portion 32 includes a second transverse rib 321 and two second vertical ribs 322, wherein the second transverse rib 321 extends along the third direction and is disposed at the end of the second plug plate 30 away from the bottom plate 11. The two second vertical ribs 322 are disposed in parallel and both extend along the second direction. A fifth groove 332 is formed between the two second vertical ribs 322 facing each other, the corresponding parts of the second transverse rib 321, and the corresponding parts of the second main body plate 31. A fourth groove 331 and a sixth groove 333 are respectively formed between the two second vertical ribs 322 facing away from each other, the corresponding parts of the second transverse rib 321, and the corresponding parts of the second main body plate 31. As shown Fig.10 As shown, an insertion gap is formed between the fourth rib 141 and the fifth rib 142, and an insertion gap is also formed between the fifth rib 142 and the sixth rib 143. The two second vertical ribs 322 are respectively inserted between the fourth rib 141 and the fifth rib 142, and between the fifth rib 142 and the sixth rib 143. In other words, the second limiting rib group 14 and the second plug plate 30 form a mutually inserted structure, which further improves the sealing of the glue chamber 50 and avoids the problem of glue overflow.

[0062] like Figure 3 , Figure 9-11As shown, the bottom plate 11 is provided with a second wire-passing groove 112, and the bottom of the second plug-in board 30 is convexly provided with a second wire-pressing portion 34, which is plugged into the second wire-passing groove 112 and presses the lead 43 against the bottom of the second wire-passing groove 112. The second wire-pressing portion 34 is provided with a positioning groove 341 on the surface facing the second wire-passing groove 112, and the lead 43 is plugged into and matched with the positioning groove 341. Through the plug-in cooperation between the second wire-pressing portion 34 and the second wire-passing groove 112, and the plug-in cooperation between the positioning groove 341 and the lead 43, the lead-out position of the lead 43 is well sealed, avoiding the problem of glue overflow at this position. In this embodiment, the circuit board 40 includes two leads 43, so two second wire-passing grooves 112 are provided on the bottom plate 11, and two second wire-pressing portions 34 are correspondingly provided at the bottom of the second plug-in board 30.

[0063] In this embodiment, Fig. 9 As shown, since the second wire pressing portion 34 is provided with a positioning groove 341, in order to ensure the structural strength of the second wire pressing portion 34, the second wire pressing portion 34 needs to be larger in the third direction, and the spacing between the fourth rib 141 and the fifth rib 142, and between the fifth rib 142 and the sixth rib 143 along the third direction is small, which is not enough to accommodate the second wire pressing portion 34. Therefore, in this embodiment, the second wire pressing portion 34 protrudes along the first direction and is arranged on the side of the second vertical rib 322 away from the glue containing cavity 50, so that the second wire pressing portion 34 avoids the second limiting rib group 14. Figure 3 As shown, in order to enable the second wire passing groove 112 to cooperate with the second wire pressing portion 34 and the lead wire 43, the second wire passing groove 112 is constructed as a cross-shaped structure.

[0064] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the field, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scopes, and the content of this specification should not be understood as limiting the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A circuit board mounting structure, characterized in that: include: Base (10); The first plug-in board (20) and the second plug-in board (30) are arranged at intervals along the first direction and are respectively plugged into the base (10) along the second direction, and are surrounded by the base (10) to form a glue containing cavity (50); The circuit board (40) comprises a circuit board body (41) and a wiring piece (42) and a lead wire (43) respectively connected to the circuit board body (41); the circuit board body (41) is at least partially arranged in the glue containing cavity (50); the wiring piece (42) is led out from between the first plug board (20) and the base (10) to the outside of the glue containing cavity (50); the lead wire (43) is led out from between the second plug board (30) and the base (10) to the outside of the glue containing cavity (50); and the glue containing cavity (50) is filled with glue.

2. The circuit board mounting structure according to claim 1, wherein: The base (10) forms an installation cavity with an opening on one side, and a first limiting rib group (13) is arranged on the inner wall of the installation cavity. The first plug plate (20) comprises a first main body plate (21) and a first convex rib portion (22) arranged on the side of the first main body plate (21) away from the glue containing cavity (50). The first convex rib portion (22) and the first main body plate (21) are arranged to form a first slot group (23), and the first slot group (23) is plugged into and matched with the first limiting rib group (13).

3. The circuit board mounting structure according to claim 2, wherein: The base (10) comprises a bottom plate (11) and a side plate (12) arranged around the outer periphery of the bottom plate (11); the first limiting rib group (13) comprises a first rib (131), a second rib (132) and a third rib (133) arranged at intervals along a third direction; the first rib (131) and the third rib (133) are both formed at the intersection of the bottom plate (11) and the side plate (12) and are arranged opposite to each other; the second rib (132) is arranged between the first rib (131) and the third rib (133); The first slot group (23) comprises a first slot (231), a second slot (232) and a third slot (233) which are arranged at intervals along the third direction; the first slot (231) is provided with an opening at one end along the second direction and at one end along the third direction and is plugged into and matched with the first rib (131); the second slot (232) is provided with an opening at one end along the second direction and is plugged into and matched with the second rib (132); the third slot (233) is provided with an opening at one end along the second direction and at one end along the third direction and is plugged into and matched with the third rib (133).

4. The circuit board mounting structure according to claim 1, wherein: The base (10) comprises a bottom plate (11), a first wire-passing groove (111) is arranged on the bottom plate (11), a first wire-pressing portion (25) is protruded from one end of the first plug plate (20) close to the bottom plate (11) along the second direction, the first wire-pressing portion (25) is plugged into the first wire-passing groove (111), and the wiring piece (42) is pressed against the bottom of the first wire-passing groove (111).

5. The circuit board mounting structure according to claim 4, characterized in that: A guide groove (24) is provided at the bottom of the first plug plate (20) on the side facing away from the glue containing cavity (50); the wiring piece (42) comprises a U-shaped portion (421); the U-shaped portion (421) comprises a first section (4211), a second section (4212) and a third section (4213) connected in sequence; the first section (4211) is located in the glue containing cavity (50); the second section (4212) is arranged in the first wire passing groove (111); and the third section (4213) is limited to the guide groove (24).

6. The circuit board mounting structure according to claim 1, wherein: The base (10) forms an installation cavity with an opening on one side, and a second limiting rib group (14) is arranged on the inner wall of the installation cavity. The second plug plate (30) comprises a second main body plate (31) and a second convex rib portion (32) arranged on the side of the second main body plate (31) away from the glue containing cavity (50). The second convex rib portion (32) and the second main body plate (31) are arranged to form a second slot group (33), and the second slot group (33) is plugged into and matched with the second limiting rib group (14).

7. The circuit board mounting structure according to claim 6, wherein: The base (10) comprises a bottom plate (11) and a side plate (12); the second limiting rib assembly (14) comprises a fourth rib (141), a fifth rib (142) and a sixth rib (143) arranged at intervals along a third direction; the fourth rib (141) and the sixth rib (143) are both formed at the intersection of the bottom plate (11) and the side plate (12) and are arranged opposite to each other; the fifth rib (142) is arranged between the fourth rib (141) and the sixth rib (143); The second slot group (33) comprises a fourth slot (331), a fifth slot (332) and a sixth slot (333) which are arranged at intervals along the third direction; the fourth slot (331) is provided with an opening at one end along the second direction and at one end along the third direction and is plugged into and matched with the fourth rib (141); the fifth slot (332) is provided with an opening at one end along the second direction and is plugged into and matched with the fifth rib (142); the sixth slot (333) is provided with an opening at one end along the second direction and at one end along the third direction and is plugged into and matched with the sixth rib (143).

8. The circuit board mounting structure according to claim 1, wherein: The base (10) comprises a bottom plate (11), a second wire-passing groove (112) is arranged on the bottom plate (11), a second wire-pressing portion (34) is protruding from the bottom of the second plug plate (30), the second wire-pressing portion (34) is plugged into the second wire-passing groove (112), and the lead wire (43) is pressed against the bottom of the second wire-passing groove (112); A positioning groove (341) is provided on the surface of the second wire pressing portion (34) facing the second wire passing groove (112), and the lead wire (43) is plugged into and matched with the positioning groove (341).

9. The circuit board mounting structure according to claim 8, wherein: The base (10) comprises a bottom plate (11) and a side plate (12) arranged around the outer periphery of the bottom plate (11); an insertion slot (121) is provided on the side plate (12); and the circuit board body (41) is inserted into the insertion slot (121).

10. Low voltage electrical apparatus, characterized in that: It comprises the circuit board mounting structure according to any one of claims 1 to 9, wherein the low-voltage electrical appliance is a contactor or a circuit breaker.

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