Solid-state relay

Abstract

The utility model discloses a solid-state relay, which comprises a shell, a cover body and a PCB (Printed Circuit Board), and is characterized in that one end of the shell in a first direction is provided with an opening; the two opposite inner side faces of the shell are provided with opposite guide limiting grooves respectively, the PCB is installed in the shell from the opening, and the two opposite ends of the PCB are inserted into the guide limiting grooves in the corresponding sides respectively. And the cover body is connected to the opening of the shell and limits the PCB to exit from the opening. According to the utility model, the PCB is limited by the guide limiting groove, so that the PCB can be fixed without pouring a pouring sealant, the assembly process is simpler, automatic assembly can be realized, and the assembly efficiency is further greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a solid-state relay. Background Art

[0002] A solid-state relay is a contactless switch composed of microelectronic circuits, discrete electronic devices, power electronic power devices, etc. Therefore, a PCB board is usually included in the solid-state relay, and a PCBA assembly is formed after assembling components on the PCB board. Currently, the PCBA assembly is directly installed into the shell of the solid-state relay, and then fixed by potting glue. This method has a troublesome potting process for the potting glue, resulting in inconvenient assembly of this solid-state relay and difficulty in realizing automated assembly. Summary of the Utility Model

[0003] Aiming at the technical problems existing in the prior art, the utility model provides a solid-state relay, which can realize automated assembly by changing the fixing method of the PCB board so that the utility model does not need to use potting glue to fix the PCB board.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a solid-state relay, including a shell, a cover body and a PCB board, one end of the shell in the first direction is provided with an opening; opposite inner side surfaces of the shell are respectively provided with oppositely arranged guiding and limiting grooves, the PCB board is inserted into the shell from the opening, and opposite ends of the PCB board are respectively inserted into the corresponding guiding and limiting grooves on the corresponding side; the cover body is connected to the opening of the shell and restricts the PCB board from exiting from the opening.

[0005] Further, the guiding and limiting grooves extend along the first direction and are arranged along the second direction, the second direction is perpendicular to the first direction, and the PCB board is parallel to the first direction and the second direction.

[0006] Further, the shell and / or the cover body are / is provided with a supporting and limiting structure to support and limit the PCB board.

[0007] Further, the first supporting and limiting structure is located on the inner wall surface at the other end of the shell in the first direction, and includes a plurality of first supporting ribs arranged along the second direction, each first supporting rib extends along the third direction, and each first supporting rib is respectively provided with a first segmented opening corresponding to and engaging with one end of the PCB board in the first direction; the third direction is perpendicular to the first direction and the second direction.

[0008] Furthermore, the second support limiting structure includes a plurality of second support ribs arranged along the second direction, each second support rib extends along a third direction, and each second support rib is provided with a second segment opening corresponding to the other end of the PCB board in the first direction; the third direction is perpendicular to the first direction and the second direction.

[0009] Furthermore, it also includes a heat sink and a thyristor chip, the thyristor chip and the heat sink are fixed together, and the PIN pins of the thyristor chip are inserted and welded to the PCB board; the heat sink and the thyristor chip are located in the shell, and the heat sink is fixedly connected to the shell.

[0010] Furthermore, the heat sink is provided with a positioning column, which is inserted into a corresponding positioning hole of the PCB board and is welded and fixed to the PCB board; the heat sink is screwed to the shell.

[0011] Furthermore, an LED lamp is connected to the PCB board, and the housing or the cover is provided with a positioning structure for providing positioning for the LED lamp, or the housing and the cover cooperate with each other to provide a positioning structure for providing positioning for the LED lamp.

[0012] Furthermore, the positioning structure includes a first positioning notch provided on the shell and a second positioning notch provided on the cover, and the first positioning notch and the second positioning notch are arranged opposite to each other and enclose a positioning hole outside the LED lamp.

[0013] Furthermore, the shell body is snap-connected to the cover body.

[0014] Furthermore, the edges of the cover body are provided with a plurality of connecting pieces extending toward the shell, each connecting piece is provided with a clamping hole, and the inner side surface of the shell is provided with a wedge-shaped clamping block corresponding to the clamping hole of each connecting piece, each connecting piece of the cover body extends into the shell, and the clamping holes thereon are respectively engaged with the corresponding wedge-shaped clamping blocks.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. Since the two opposite inner sides of the shell are respectively provided with oppositely arranged guide limit grooves, the PCB board is installed in the shell, and the opposite ends of the PCB board are respectively inserted into the guide limit grooves on the corresponding sides, and the cover body is used to limit the PCB board from withdrawing from the opening of the shell, so that the utility model can limit the PCB board by the guide limit groove, so that the utility model does not need to use the method of pouring potting glue to fix the PCB board, so that the assembly process is relatively simple, and automatic assembly can be realized, thereby greatly improving the assembly efficiency.

[0017] 2. The housing and / or the cover are provided with a support and limit structure, which can further support and limit the PCB board, making the PCBA assembly more stable and reducing the influence brought by adverse working conditions such as vibration.

[0018] 3. In the present utility model, the radiator fixedly connected to the PCB board is fixedly connected to the housing, which can further improve the stability of the PCBA assembly and reduce the influence brought by adverse working conditions such as vibration.

[0019] The present utility model will be further described in detail below with reference to the drawings and embodiments; however, a solid-state relay of the present utility model is not limited to the embodiments. Brief Description of the Drawings

[0020] Figure 1 is an exploded schematic view of the present utility model;

[0021] Figure 2 is a three-dimensional structural schematic view of the housing of the present utility model;

[0022] Figure 3 is a three-dimensional structural schematic view of the cover of the present utility model;

[0023] Figure 4 is an assembly schematic view of the PCBA assembly of the present utility model;

[0024] Figure 5 is a three-dimensional structural schematic view of the PCBA assembly of the present utility model;

[0025] Figure 6 is an assembly schematic view of the housing and the PCBA assembly of the present utility model;

[0026] Figure 7 is a three-dimensional structural schematic view after the PCBA assembly of the present utility model is installed in the housing;

[0027] Figure 8 is an assembly schematic view of the cover and the housing of the present utility model;

[0028] Figure 9 is a three-dimensional structural schematic view of the present utility model;

[0029] Figure 10 is the front view of the present utility model;

[0030] Figure 11 is Figure 10 the H-H cross-sectional view of

[0031] In the figure, 1 is a housing, 11 is a guiding and limiting groove, 12 is a first support rib, 121 is a first segmented opening, 13 is a first positioning notch, 14 is a wedge-shaped clamping block, 2 is a cover body, 21 is a second support rib, 211 is a second segmented opening, 22 is a second positioning notch, 23 is a connecting piece, 231 is a clamping hole, 3 is a PCB board, 31 is a positioning hole, 32 is a pin hole, 4 is a radiator, 41 is a positioning post, 5 is a thyristor chip, 51 is a PIN needle, 6 / 7 are screws, and 8 is an LED lamp. Detailed implementation manners

[0032] In the present utility model, for terms such as "first", "second", "third", etc., they are only used to distinguish similar objects, rather than to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protection scope of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, in the description of the present utility model, unless otherwise stated, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. In the description of the present utility model, unless otherwise clearly defined and limited, terms such as "set", "connect", etc. should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection, can be a mechanical connection, can be an electrical connection, can be directly connected, or can be indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Please refer to Figures 1-11As shown in the figure, a solid-state relay of the present utility model includes a housing 1, a cover 2, and a PCB board 3. One end of the housing 1 in the first direction is provided with an opening. On two opposite inner side surfaces of the housing 1, there are respectively provided opposite guiding and limiting grooves 11. The guiding and limiting grooves 11 extend in the first direction and are arranged in the second direction. The second direction is perpendicular to the first direction. The PCB board 3 is inserted into the housing 1 from the opening of the housing 1, and two opposite ends of the PCB board 3 are respectively inserted into the corresponding guiding and limiting grooves 11 on the corresponding side. The PCB board 3 is parallel to the first direction and the second direction. The cover 2 is connected to the opening of the housing 1 and restricts the PCB board 3 from exiting from the opening of the housing 1.

[0035] Furthermore, the housing 1 and / or the cover 2 are provided with a supporting and limiting structure to support and limit the PCB board 3. In this embodiment, the housing 1 and the cover 2 are respectively provided with a supporting and limiting structure, but it is not limited thereto.

[0036] As Figure 2 shown, the supporting and limiting structure on the housing 1 is located on the inner wall surface at the other end of the housing 1 in the first direction, and includes a plurality of first supporting ribs 12 arranged in the second direction. Each first supporting rib 12 extends in the third direction, and each first supporting rib 12 is respectively provided with a first segmented opening 121 corresponding to and engaging with one end of the PCB board 3 in the first direction. The third direction is perpendicular to the first direction and the second direction. Specifically, in this embodiment, the first direction is the front-back direction, the second direction is the left-right direction, and the third direction is the up-down direction.

[0037] As Figure 3 shown, the supporting and limiting structure on the cover 2 includes a plurality of second supporting ribs 21 arranged in the second direction. Each second supporting rib 21 extends in the third direction, and each second supporting rib 21 is respectively provided with a second segmented opening 211 corresponding to and engaging with the other end of the PCB board 3 in the first direction.

[0038] The present utility model further includes a heat sink 4 and a thyristor chip 5. The thyristor chip 5 is fixed together with the heat sink 4, and the PIN pins 51 of the thyristor chip 5 are inserted and welded to the PCB board 3. The heat sink 4 is provided with a plurality of positioning posts 41. Each positioning post 41 is respectively inserted through the corresponding positioning holes 31 on the PCB board 3 and is welded and fixed to the PCB board 3. Specifically, the thyristor chip 5 is locked to the heat sink 4 by screws 6. During assembly, first insert the PIN pins 51 of the thyristor chip 5 into the corresponding pin holes 32 on the PCB board 3, insert the positioning posts 41 of the heat sink 4 through the positioning holes 31 on the PCB board 3, and then perform overall wave soldering to form a PCBA assembly, as Figure 4 、 Figure 5Then the entire PCBA assembly is loaded into the housing 1 from the opening of the housing 1, and the heat sink 4 is fixedly connected to the housing 1. Specifically, in this embodiment, the heat sink 4 is fixed to the housing 1 by screws 7, but the fixing method of the two is not limited to this.

[0039] In this embodiment, the PCB board 3 is connected to an LED lamp 8, and the housing 1 or the cover 2 is provided with a positioning structure for providing positioning for the LED lamp 8, or the housing 1 and the cover 2 cooperate with a positioning structure for providing positioning for the LED lamp 8, and the LED lamp 8 is at least partially exposed outside the housing 1. Specifically, Figure 2 , Figure 3 As shown, the positioning structure includes a first positioning notch 13 provided on the housing 1 and a second positioning notch 22 provided on the cover 2 . The first positioning notch 13 and the second positioning notch 22 are arranged opposite to each other and enclose a positioning hole outside the LED lamp 8 .

[0040] In this embodiment, the housing 1 is snap-connected with the cover 2. Specifically, the edges of the cover 2 are provided with a plurality of connecting pieces 23 extending toward the housing 1, each connecting piece 23 is provided with a snap-in hole 231, and the inner side of the housing 1 is provided with a wedge-shaped snap-in block 14 corresponding to the snap-in hole 231 of each connecting piece 23. Each connecting piece 23 of the cover 2 extends into the housing 1, and the snap-in holes 231 thereon are snap-fitted with the corresponding wedge-shaped snap-in blocks 14 one by one, but the snap-in connection method between the housing 1 and the cover 2 is not limited thereto.

[0041] The utility model discloses a solid-state relay. When assembling, the PCB board 3, the heat sink 4 and the thyristor chip 5 are first assembled together in the above-mentioned manner to form a PCBA assembly, and then the PCBA assembly is installed in the housing 1, and the two opposite ends of the PCB board 3 in the second direction are respectively inserted into the two guide limit grooves 11 of the housing 1, so that one end of the PCB board 3 in the first direction is respectively inserted into the first segmented opening 121 of each first supporting rib 12, so that the LED lamp 8 on the PCB board 3 is inserted into the first positioning notch 13 of the housing 1, and then the heat sink 4 is locked in the housing 1 with a screw 7, as shown in FIG. Figure 6 , Figure 7 Then, the cover 2 is snap-fitted to the housing 1 in the above manner, as shown. Figure 8 , Figure 9 After assembly, the other end of the PCB board 3 in the first direction is respectively inserted into the second segment openings 211 of the second supporting ribs 21 on the cover body 2, and the second positioning notch 22 on the cover body 2 and the first positioning notch 13 of the housing 1 are combined to form a circular positioning hole to position the LED lamp 8 ( Figure 9 The LED lamp 8 is not shown) Figures 9-11 shown.

[0042] A solid state relay of the present utility model uses two guiding and limiting grooves 11 to limit the PCB board 3, so that the present utility model does not need to use the method of pouring potting glue to fix the PCB board 3, thereby making the assembly process of the PCB board 3 relatively simple, capable of realizing automatic assembly, and thus greatly improving the assembly efficiency. In addition, the present utility model further uses the support and limiting structure on the housing 1 and / or the cover 2 to support and limit the PCB board 3, and fixedly connects the radiator 4 to the housing 1, capable of realizing the stable fixation of the PCBA assembly and reducing the influence brought by adverse working conditions such as vibration.

[0043] For a solid state relay of the present utility model, the parts not involved are the same as or can be implemented by the prior art.

[0044] The above embodiments are only used to further illustrate a solid state relay of the present utility model, but the present utility model is not limited to the embodiments. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model all fall within the protection scope of the technical solution of the present utility model.

Claims

1. A solid-state relay, comprising a housing, a cover and a PCB board, wherein an opening is provided at one end of the housing in a first direction; characterized in that: The two opposite inner side surfaces of the shell are respectively provided with oppositely arranged guide limit grooves, the PCB board is loaded into the shell from the opening, and the opposite ends of the PCB board are respectively inserted into the guide limit grooves on the corresponding sides; the cover body is connected to the opening of the shell and limits the PCB board from withdrawing from the opening.

2. The solid-state relay according to claim 1, characterized in that: The guide limiting grooves extend along the first direction and are arranged along a second direction, the second direction is perpendicular to the first direction, and the PCB board is parallel to the first direction and the second direction.

3. The solid-state relay according to claim 2, characterized in that: The housing and / or cover is provided with a supporting and limiting structure to support and limit the PCB board.

4. The solid-state relay according to claim 3, characterized in that: The support and limiting structure on the shell is located on the inner wall surface where the other end of the shell in the first direction is located, and includes a plurality of first support ribs arranged along the second direction, each of the first support ribs extends along a third direction, and each of the first support ribs is provided with a first segmented opening corresponding to one end of the PCB board in the first direction; the third direction is perpendicular to the first direction and the second direction.

5. The solid-state relay according to claim 3, characterized in that: The support and limiting structure on the cover body includes a plurality of second support ribs arranged along the second direction, each second support rib extends along a third direction, and each second support rib is provided with a second segmented opening corresponding to the other end of the PCB board in the first direction; the third direction is perpendicular to the first direction and the second direction.

6. The solid-state relay according to claim 1, characterized in that: It also includes a heat sink and a thyristor chip, which is fixed to the heat sink, and the PIN pin of the thyristor chip is inserted and welded to the PCB board; the heat sink and the thyristor chip are located in the shell, and the heat sink is fixedly connected to the shell.

7. The solid-state relay according to claim 6, characterized in that: The heat sink is provided with a positioning column, which is inserted into a corresponding positioning hole of the PCB board and is welded and fixed to the PCB board; the heat sink is screwed to the shell.

8. The solid-state relay according to claim 1, characterized in that: The PCB board is connected with an LED lamp, and the housing or the cover is provided with a positioning structure for providing positioning for the LED lamp, or the housing and the cover are matched with a positioning structure for providing positioning for the LED lamp.

9. The solid-state relay according to claim 8, characterized in that: The positioning structure comprises a first positioning notch provided on the shell and a second positioning notch provided on the cover. The first positioning notch and the second positioning notch are arranged opposite to each other and enclose a positioning hole outside the LED lamp.

10. The solid-state relay according to claim 1, characterized in that: The shell is snap-connected to the cover body, and the edges of the cover body are provided with multiple connecting pieces extending toward the shell, each connecting piece is provided with a snap hole, and the inner side surface of the shell is provided with wedge-shaped snap blocks corresponding to the snap holes of each connecting piece, each connecting piece of the cover body extends into the shell, and the snap holes thereon are snap-fitted with the corresponding wedge-shaped snap blocks one by one.

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