Circuit connecting device of relay module

Abstract

A circuit connecting device of a relay module is used for being electrically connected with a plurality of relays and at least two wiring terminals and comprises a first circuit board and a second circuit board which are arranged at intervals in the thickness direction, and at least one relay and at least one wiring terminal are installed on the first circuit board. The first circuit board is provided with at least one relay or at least one wiring terminal, the second circuit board is provided with at least one relay or at least one wiring terminal, the connection circuit board is inserted and electrically connected between the first circuit board and the second circuit board, and the connection circuit board is located on the side edge of the first circuit board and the side edge of the second circuit board. According to the utility model, stable electric connection between circuit boards is realized in an ultra-narrow space, the current-carrying capability is ensured, and the installation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of relays, and in particular to a circuit connection device for a relay module. Background Technology

[0002] With the rapid development of the industrial control industry, customers are paying more and more attention to higher space utilization in limited space, i.e., smaller width, in relay products. Multi-layer circuit board modules can significantly reduce product width. Therefore, how to achieve stable and reliable electrical connection between multi-layer circuit boards in ultra-narrow space is becoming increasingly important.

[0003] Currently, multilayer circuit boards are mostly connected using pins, headers, and wires. In terms of installation space, these components often have certain width requirements, making them difficult to install in ultra-narrow spaces. Regarding current carrying capacity, these components have a columnar structure, and due to the limited cross-sectional area in ultra-narrow spaces, their ability to carry larger currents is limited. In terms of connection structure, pins and headers, due to their rigid structure, are often suitable for connecting vertically aligned holes. When the order of the holes to be connected on the circuit board is staggered, soldering becomes difficult, increasing manufacturing costs. Furthermore, interlaced wire connections are not only inconvenient for soldering but also increase the required width, failing to meet the requirements of ultra-narrow spaces. Utility Model Content

[0004] The main purpose of this invention is to overcome the defects of the existing electrical connection structure of multilayer circuit boards and to propose a circuit connection device for relay modules. This device adds an ultra-thin connection circuit board to achieve electrical connection between two adjacent circuit boards, ensuring the stability of the electrical connection and saving manufacturing costs.

[0005] The present invention adopts the following technical solution:

[0006] A circuit connection device for a relay module is provided for electrically connecting a plurality of relays and at least two terminals. The device includes a first circuit board and a second circuit board spaced apart along the thickness direction. At least one of the relays and at least one of the terminals are mounted on the first circuit board. At least one of the relays or at least one of the terminals is mounted on the second circuit board. The device also includes a connecting circuit board, which is inserted into and electrically connected between the first circuit board and the second circuit board. The connecting circuit board is located on the side of the first circuit board and the second circuit board.

[0007] The connection circuit board is provided with a first plug-in terminal group and a second plug-in terminal group. The first plug-in terminal group is plugged into the first circuit board and is provided with a plurality of first solder pads for electrical connection with the first circuit board. The second plug-in terminal group is plugged into the second circuit board and is provided with a plurality of second solder pads for electrical connection with the second circuit board.

[0008] The first plug-in terminal group is provided with a plurality of first plug-in terminals, each of which is provided with a first pad; the second plug-in terminal group is provided with a plurality of second plug-in terminals, each of which is provided with a second pad; the first circuit board is provided with a plurality of first sockets for the insertion of the first plug-in terminals, and the second circuit board is provided with a plurality of second sockets for the insertion of the second plug-in terminals.

[0009] The edge of the first circuit board on the side where the connecting circuit board is located has a first distance from the first socket, and the size of the first plug-in end is related to the first distance; the edge of the second circuit board on the side where the connecting circuit board is located has a second distance from the second socket, and the size of the second plug-in end is related to the second distance.

[0010] The connecting circuit board is further provided with a first wiring group and a second wiring group. The first wiring group is arranged on one side of the connecting circuit board and electrically connected between a plurality of first pads and a plurality of second pads. The second wiring group is arranged on the other side of the connecting circuit board and electrically connected between a plurality of first pads and a plurality of second pads.

[0011] The first wiring group includes a plurality of first connecting lines, and the second wiring group includes a plurality of second connecting lines; the number of first connecting lines in the first wiring group is less than or equal to the number of first pads or second pads, and the number of second connecting lines in the second wiring group is less than or equal to the number of second pads or second pads.

[0012] The width of the first connecting line is in the range of 0.5mm-3.2mm, and the width of the second connecting line is in the range of 0.5mm-3.2mm.

[0013] The first wiring group has a plurality of first connecting lines that are spaced apart along the length of the connecting circuit board, and the second wiring group has a plurality of second connecting lines that are spaced apart along the length of the connecting circuit board.

[0014] The relay and the terminal block located on the first circuit board are arranged along the length of the first circuit board, and the terminal block is located on the side of the first circuit board along the length of the first circuit board; the connecting circuit board is located outside the relay.

[0015] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0016] The device of this utility model is provided with a connecting circuit board that is plugged in and electrically connected between a first circuit board and a second circuit board. The connecting circuit board is located on the side of the first circuit board and the second circuit board. The connecting circuit board can adopt an ultra-thin structure to achieve a stable electrical connection between the circuit boards in an ultra-narrow space.

[0017] The device of this utility model has a circuit board with a plurality of first plug-in terminals that are plugged into a first plug hole of a first circuit board and a plurality of second plug-in terminals that are plugged into a second plug hole of a second circuit board. The first plug-in terminals are also provided with a plurality of first solder pads for electrical connection with the first circuit board, and the second plug-in terminals are provided with a plurality of second solder pads for electrical connection with the second circuit board. During installation, multiple electrical connection holes are installed simultaneously, saving manufacturing costs.

[0018] The device of this utility model sets the size of the first plug-in end according to the first distance between the edge of the connecting circuit board on the side of the first circuit board and the first socket; and sets the size of the second plug-in end according to the second distance between the edge of the connecting circuit board on the side of the second circuit board and the second socket, thereby ensuring the stability of plugging and electrical connection.

[0019] The device of this utility model further includes a first wiring group and a second wiring group on different sides of the connecting circuit board. The first wiring group is electrically connected between a plurality of first pads and a plurality of second pads, and the second wiring group is electrically connected between a plurality of first pads and a plurality of second pads. The first wiring group and the second wiring group can be different, which can realize the electrical connection of staggered holes between multilayer circuit boards.

[0020] The device of this utility model includes a first wiring group comprising a plurality of first connecting lines and a second wiring group comprising a plurality of second connecting lines. The number of first connecting lines in the first wiring group is less than or equal to the number of first pads or second pads, and the number of second connecting lines in the second wiring group is less than or equal to the number of second pads or second pads. The width of the first connecting lines ranges from 0.5mm to 3.2mm, and the width of the second connecting lines ranges from 0.5mm to 3.2mm. By setting connecting lines of different widths, different currents can be carried, thereby increasing the upper limit of the current carrying capacity. Attached Figure Description

[0021] Figure 1 This is the front view of the present utility model;

[0022] Figure 2 for Figure 1 Top view;

[0023] Figure 3 This is a diagram showing the structure of the connecting circuit board;

[0024] Figure 4 This is an overall view of the relay module of this utility model;

[0025] Figure 5 This is a perspective view of the device of this utility model;

[0026] Figure 6 Diagram of the circuit board structure (front view);

[0027] Figure 7 This is a diagram of the circuit board structure (reverse side).

[0028] in:

[0029] 10. Relay; 20. Terminal block; 30. First circuit board; 31. First socket; 40. Second circuit board; 41. Second socket; 50. Connecting circuit board; 51. First plug-in terminal group; 51a. First plug-in terminal; 52. Second plug-in terminal group; 52a. Second plug-in terminal; 53. First pad; 54. Second pad; 55. First wiring group; 55a. First connecting wire; 56. Second wiring group; 56a. Second connecting wire; 60. Housing. Detailed Implementation

[0030] The present invention will be further described below through specific embodiments.

[0031] See Figures 1 to 7 A circuit connection device for a relay module is disclosed, used for electrically connecting a plurality of relays 10 and at least two terminals 20. The device includes a first circuit board 30, a second circuit board 40, and a connecting circuit board 50. The first circuit board 30 and the second circuit board 40 are spaced apart along their thickness direction, with the gap between them accommodating the relays 10 and the terminals 20. The thickness direction refers to the thickness direction of the circuit boards. The first circuit board 30 and the second circuit board 40 may be parallel or non-parallel. At least one relay 10 and at least one terminal 20 are mounted on the first circuit board 30, and at least one relay 10 or at least one terminal 20 is mounted on the second circuit board 40. The terminals 20 are further divided into input terminals and output terminals. The relays 10 and terminals 20 are electrically connected to their corresponding circuit boards. The number and distribution of the relays 10 and terminals 20 on the first circuit board 30 and the second circuit board 40 can be adjusted according to the relay module configuration.

[0032] The connecting circuit board 50 is plugged into and fixed between the first circuit board 30 and the second circuit board 40, and is electrically connected to the first circuit board 30 and the second circuit board 40, thereby establishing an electrical connection between the relay 10 on the first circuit board 30 and the terminal 20 on the second circuit board 40, or an electrical connection between the terminal 20 on the first circuit board 30 and the relay 10 on the second circuit board 40, etc. The connecting circuit board 50 is located on the side of the first circuit board 30 and the second circuit board 40, or it can be located in other suitable positions. The main body of the connecting circuit board 50 is rectangular, trapezoidal or other polygonal, and it uses an ultra-thin circuit board. For example, the connecting circuit board 50 is 0.6mm thick, which can be installed in a space of 1.2mm-1.5mm, that is, occupying a small space. The connecting circuit board 50 is provided with a first plug-in terminal group 51 and a second plug-in terminal group 52. The first plug-in terminal group 51 is located on the side of the connecting circuit board 50 opposite to the first circuit board 30. It is used to plug into the first circuit board 30 and is provided with a plurality of first solder pads 53. Electrical connection is achieved by soldering the first solder pads 53 to the corresponding electrical nodes of the first circuit board 30. The second plug-in terminal group 52 is located on the side of the connecting circuit board 50 opposite to the second circuit board 40. It is used to plug into the second circuit board 40 and is provided with a plurality of second solder pads 54. Electrical connection is achieved by soldering the second solder pads 54 to the corresponding electrical nodes of the second circuit board 40. The first solder pads and the second solder pads can be soldered by wave soldering or manual soldering, etc.

[0033] Specifically, the first connector group 51 is provided with a plurality of first connectors 51a, which are spaced apart along the length of the connecting circuit board 50, and each first connector 51a is provided with a first pad 53. The first circuit board 30 is provided with a plurality of first sockets 31 for the first connectors 51a to be inserted. The second connector group 52 is provided with a plurality of second connectors 52a, each second connector 52a is provided with a second pad 54, and the second circuit board 40 is provided with a plurality of second sockets 32 for the second connectors 52a to be inserted.

[0034] Furthermore, the edge of the first circuit board 30 on the side where the connecting circuit board 50 is located has a first distance from the first socket 31. The size of the first plug-in end 51a is related to the first distance. For example, if the first distance is at least 0.25mm, then the width of the first plug-in end 51a needs to be large to ensure stable connection. The first pad 53 can be wave soldered on one side. The edge of the second circuit board 40 on the side where the connecting circuit board 50 is located has a second distance from the second socket 32. The size of the second plug-in end 52a is related to the second distance. For example, if the second distance is at least 1.1mm, then the width of the second plug-in end 52a needs to be small. The first pad 53 can be double-sided soldered.

[0035] The connecting circuit board 50 also has multiple layers of wiring to meet the requirements of interleaved electrical connections. In this embodiment, two layers of wiring are provided, namely a first wiring group 55 and a second wiring group 56. The first wiring group 55 is arranged on one side of the connecting circuit board 50 and electrically connected between a plurality of first pads 53 and a plurality of second pads 54. The second wiring group 56 is arranged on the other side of the connecting circuit board 50 and electrically connected between a plurality of first pads 53 and a plurality of second pads 54. That is, wiring groups are provided on both the front and back sides of the connecting circuit board 50.

[0036] In this embodiment, the first wiring group 55 includes a plurality of first connecting lines 55a, and the second wiring group 56 includes a plurality of second connecting lines 56a. The width of the first connecting lines 55a ranges from 0.5mm to 3.2mm, and the width of the second connecting lines 56a also ranges from 0.5mm to 3.2mm. The width of the connecting lines is adjusted to meet the maximum current load requirements. The number of first connecting lines 55a in the first wiring group 55 is less than or equal to the number of first pads 53 or second pads 54, and the number of second connecting lines 56a in the second wiring group 56 is less than or equal to the number of second pads 54. The structures of the first wiring group 55 and the second wiring group 56 may be the same or different.

[0037] Specifically, taking the different structures of the first wiring group 55 and the second wiring group 56 as an example, Figure 6 The diagram shows the wiring on the front side of circuit board 50. Terminals ①②③④⑥⑦⑧ have first connecting lines 55a, while terminal ⑤ does not have a first connecting line 55a. The first connecting lines 55a connected to terminals ①-⑥ have a larger width, such as 3.2mm, 3.0mm, or 2.0mm, and their maximum current carrying capacity is 6A. The first connecting lines 55a connected to terminals ⑦ and ⑧ have a smaller width, such as 0.5mm, and their maximum current carrying capacity is 0.05A.

[0038] Figure 7 The diagram shows the reverse wiring of circuit board 50. Terminals ①②⑤⑥⑦⑧ have second connecting lines 56a, while terminals ③ and ④ do not have first connecting lines 55a. The first connecting lines 55a connected to terminals ①②⑤⑥ have a larger width, such as 3.2mm, 3.0mm, 2.7mm, or 2.0mm, with a maximum current carrying capacity of 6A. The first connecting lines 55a connected to terminals ⑦ and ⑧ have a smaller width, such as 0.5mm, with a maximum current carrying capacity of 0.05A.

[0039] In this invention, a plurality of first connecting lines 55a in the first wiring group 55 are spaced apart along the length of the connecting circuit board 50, and a plurality of second connecting lines 56a in the second wiring group 56 are spaced apart along the length of the connecting circuit board 50. The spacing between two adjacent first connecting lines 55a may be the same or different, and the spacing between two adjacent second connecting lines 56a may be the same or different.

[0040] The relay module of the present invention also includes a housing 60 for enclosing the first circuit board 30, the second circuit board 40, the connecting circuit board 50, the relay 10, and the terminal blocks 20 within the cavity of the housing 60. The relay 10 and the terminal blocks 20 on the first circuit board 30 are arranged along the length of the first circuit board 30, with the terminal blocks 20 located on the sides of the first circuit board 30 along its length. In the figure, multiple terminal blocks 20 on the first circuit board 30 are respectively disposed on both sides of the first circuit board 30, resulting in a more compact space.

[0041] During assembly, the connecting circuit board 50 can be inserted before the first circuit board 30, and then soldered together with other plug-in components through a wave soldering process, reducing soldering difficulty and saving manufacturing costs. Then, the second circuit board 40 is inserted into the connecting circuit board 50, and the connecting circuit board 50 and the second circuit board 40 are soldered together using a soldering machine to complete the assembly.

[0042] In practical applications, in addition to the two-layer structure formed by the first circuit board 30 and the second circuit board 40, a third circuit board can be added to form a three-layer structure, and a connecting circuit board 50 can be added to electrically connect the third circuit board to the first circuit board 30 or the second circuit board 40 to meet the needs of more relays 10 and terminals 20.

[0043] The terms "first" and "second" used in this utility model are merely for ease of description and to distinguish different components with the same name, and do not indicate a sequential or primary / secondary relationship.

[0044] In the description of this utility model, the orientation or positional relationship indicated by terms such as "up", "down", "left", "right", "front" and "back" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model.

[0045] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0046] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A circuit connection device for a relay module, used for electrically connecting a plurality of relays and at least two terminals, comprising a first circuit board and a second circuit board spaced apart along the thickness direction, wherein at least one of the aforementioned relays and at least one of the aforementioned terminals are mounted on the first circuit board, and at least one of the aforementioned relays or at least one of the aforementioned terminals is mounted on the second circuit board, characterized in that, It also includes a connecting circuit board, which is plugged into and electrically connected between the first circuit board and the second circuit board, and the connecting circuit board is located on the side of the first circuit board and the second circuit board.

2. The circuit connection device for a relay module as described in claim 1, characterized in that, The connection circuit board is provided with a first plug-in terminal group and a second plug-in terminal group. The first plug-in terminal group is plugged into the first circuit board and is provided with a plurality of first solder pads for electrical connection with the first circuit board. The second plug-in terminal group is plugged into the second circuit board and is provided with a plurality of second solder pads for electrical connection with the second circuit board.

3. The circuit connection device for a relay module as described in claim 2, characterized in that, The first plug-in terminal group is provided with a plurality of first plug-in terminals, each of which is provided with a first pad; the second plug-in terminal group is provided with a plurality of second plug-in terminals, each of which is provided with a second pad; the first circuit board is provided with a plurality of first sockets for the insertion of the first plug-in terminals, and the second circuit board is provided with a plurality of second sockets for the insertion of the second plug-in terminals.

4. The circuit connection device for a relay module as described in claim 3, characterized in that, The edge of the first circuit board on the side where the connecting circuit board is located has a first distance from the first socket, and the size of the first plug-in end is related to the first distance; the edge of the second circuit board on the side where the connecting circuit board is located has a second distance from the second socket, and the size of the second plug-in end is related to the second distance.

5. The circuit connection device for a relay module as described in claim 2, characterized in that, The connecting circuit board is further provided with a first wiring group and a second wiring group. The first wiring group is arranged on one side of the connecting circuit board and electrically connected between a plurality of first pads and a plurality of second pads. The second wiring group is arranged on the other side of the connecting circuit board and electrically connected between a plurality of first pads and a plurality of second pads.

6. The circuit connection device for a relay module as described in claim 5, characterized in that, The first wiring group includes a plurality of first connecting lines, and the second wiring group includes a plurality of second connecting lines; the number of first connecting lines in the first wiring group is less than or equal to the number of first pads or second pads, and the number of second connecting lines in the second wiring group is less than or equal to the number of second pads or second pads.

7. The circuit connection device for a relay module as described in claim 6, characterized in that, The width of the first connecting line is in the range of 0.5mm-3.2mm, and the width of the second connecting line is in the range of 0.5mm-3.2mm.

8. The circuit connection device for a relay module as described in claim 6, characterized in that, The first wiring group has a plurality of first connecting lines that are spaced apart along the length of the connecting circuit board, and the second wiring group has a plurality of second connecting lines that are spaced apart along the length of the connecting circuit board.

9. The circuit connection device for a relay module as described in claim 1, characterized in that, The relay and the terminal block located on the first circuit board are arranged along the length of the first circuit board, and the terminal block is located on the side of the first circuit board along the length of the first circuit board; the connecting circuit board is located outside the relay.

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