CN202444096U

CN202444096U - serial communication bus wiring device

Info

Publication number: CN202444096U
Application number: CN201220057406XU
Authority: CN
Inventors: 滑玉辉
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2012-02-21
Filing date: 2012-02-21
Publication date: 2012-09-19
Anticipated expiration: 2022-02-21

Abstract

The utility model provides a serial communication bus termination, include: the shell is provided with an incoming line wiring port, an outgoing line wiring port and a main board line wiring port; the incoming line conducting plate is positioned in the shell, and the wiring terminal inserted from the incoming line wiring port is communicated with the incoming line conducting plate; the outgoing conducting plate is positioned in the shell, and the wiring terminal inserted from the outgoing wiring port is communicated with the outgoing conducting plate; the main board conducting plate is positioned in the shell, and a wiring terminal inserted from a main board wiring port is communicated with the main board conducting plate; the outgoing conducting plate and the mainboard conducting plate are changed into a conducting state from a disconnected state when the incoming wiring port is inserted into the wiring terminal; and the outgoing line wiring port is inserted into the wiring terminal, and the incoming line conducting strip and the outgoing line conducting strip are changed into a conducting state from a disconnected state. According to the utility model discloses can guarantee under the condition that does not connect terminal resistance, make many online serial communication trouble to the suggestion engineering installer inserts terminal resistance.

Description

Serial communication bus wiring device

Technical Field

The utility model relates to the field of communication, more specifically relates to a serial communication bus termination.

Background

In the prior art, a modular air conditioning system uses serial communication, which must be connected to a terminal resistor on the last air conditioner. As shown in fig. 1, each air conditioner communicates with each other in a 485 bus manner, an incoming line 2 of a first air conditioner in the modular air conditioning system is connected to an incoming line wiring port of a wiring device 1, an outgoing line 3 connected to the outgoing line wiring port is connected to an incoming line wiring port of a next air conditioner, and so on, to form serial communication between the air conditioners, the main board outgoing line wiring ports of the wiring devices 1 of the air conditioners are connected to main board outgoing lines 4, wherein a terminal resistor 5 needs to be connected to a last machine, otherwise, the whole communication of the modular air conditioning system is interrupted and broken. However, in the field installation process, the terminal resistor 5 is often forgotten to be installed, or the terminal resistor 5 is damaged, so that a debugging person is difficult to find the problem.

In order to avoid the problem to the greatest extent, a wiring device specially for multi-connected unit communication needs to be designed, so that the whole communication cannot be smooth as long as any one wire is not connected among the incoming wire, the outgoing wire and the wire connecting the mainboard, and the debugging is facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can guarantee under the condition of not connecing terminal resistance, make many online serial communication trouble to suggestion engineering installer inserts or inspects terminal resistance's serial communication bus termination.

The utility model provides a serial communication bus termination, include: the shell is provided with an incoming line wiring port, an outgoing line wiring port and a main board line wiring port; the incoming line conducting plate is positioned in the shell, and a wiring terminal inserted from the incoming line wiring port is communicated with the incoming line conducting plate; the outgoing conducting plate is positioned in the shell, and a wiring terminal inserted from the outgoing wiring port is communicated with the outgoing conducting plate; the main board conducting plate is positioned in the shell, and a wiring terminal inserted from the main board wiring port is communicated with the main board conducting plate; the outgoing line conducting plate and the mainboard conducting plate are changed into a conducting state from a disconnected state when the incoming line wiring port is inserted into the wiring terminal; and the outgoing line wiring port is inserted into the wiring terminal, and the incoming line conducting strip and the outgoing line conducting strip are changed into a conducting state from a disconnecting state.

Furthermore, the outgoing conducting plate and the mainboard conducting plate are arranged oppositely, the outgoing conducting plate and the mainboard conducting plate are correspondingly provided with a first contact and a second contact respectively, and the incoming line wiring port is inserted into the wiring terminal, so that the first contact and the second contact are changed into a conducting state from a disconnecting state.

Further, the gap between the first contact and the second contact in the off state is 0.5 mm.

Further, the serial communication bus connection device further comprises: and the insulating spring is arranged between the outgoing line conducting plate and the main board conducting plate which are oppositely arranged.

Furthermore, the wiring terminal inserted into the outgoing wiring port is respectively communicated with the incoming conductive sheet and the outgoing conductive sheet.

Further, the serial communication bus connection device further comprises: and the first wire pressing device is positioned inside the shell and used for pressing the wiring terminal inserted from the wire inlet wiring port onto the wire inlet conductive sheet.

Further, the first wire pressing device includes: the first wire pressing main body comprises a rectangular first frame body with a first front end opening part and a first rear end opening part, the first front end opening part is opposite to the wire inlet wiring port, the wire inlet conducting plate extends backwards from the first front end opening part and penetrates out of the first rear end opening part, a part of the wire outlet conducting plate and a part of the mainboard conducting plate are sequentially arranged below the first wire pressing main body, the first frame body comprises a first top wall and a first bottom wall, a first threaded hole is formed in the first top wall, and a protruding part facing the first threaded hole is arranged on the inner wall surface of the first bottom wall; the screw head of the first line pressing screw is connected in a first screw head groove in the shell in a floating mode, the screw rod is connected with the first threaded hole in a matched mode, and the first line pressing main body moves linearly in the shell along the axial direction of the second line pressing screw along with the rotation of the first line pressing screw.

Further, the gap reserved for the first wire pressing body for the insertion of the wiring terminal is 1.5 mm.

Further, the serial communication bus connection device further comprises: and the second wire pressing device is positioned in the shell and used for pressing the wiring terminal inserted from the wire outlet wiring port onto the wire outlet conductive sheet.

Further, the second wire pressing device includes: the second wire pressing main body comprises a second frame body with a second front end opening part and a second rear end opening part, the second rear end opening part is opposite to the wire outgoing wiring port, the wire incoming conducting strip extends from the upper part of the wire incoming wiring port, passes through the second front end opening part and extends into the second wire pressing main body, the wire outgoing conducting strip extends from the lower part of the wire incoming wiring port to the second rear end opening part, the second frame body comprises a second top wall, a bottom supporting part parallel to the second top wall and a side connecting part connecting the second top wall and the bottom supporting part, and a second threaded hole is formed in the second top wall; and the screw head of the second line pressing screw is connected in a second screw head groove in the shell in a floating manner, the screw rod is connected with the second threaded hole in a matching manner, and the second line pressing main body linearly moves in the shell along the axial direction of the second line pressing screw along with the rotation of the second line pressing screw.

Further, the serial communication bus connection device further comprises: and the third wire pressing device is positioned in the shell and used for pressing the wiring terminal inserted from the wire connection port of the main board onto the outgoing conductive sheet.

Further, the third line pressing device includes: the third wire pressing main body comprises a rectangular third frame body with a third front end opening part and a third rear end opening part, the third rear end opening part is opposite to the main board wire connection port, the main board conducting strip extends backwards from the lower part of the wire inlet wire connection port to the third rear end opening part through the third front end opening, the third frame body is provided with a third top wall, and a third threaded hole is formed in the third top wall; and the screw head of the third line pressing screw is connected in a third screw head groove in the shell in a floating manner, the screw rod is connected with the third threaded hole in a matching manner, and the third line pressing main body linearly moves in the shell along the axial direction of the third line pressing screw along with the rotation of the third line pressing screw.

According to the utility model discloses a serial communication bus termination can guarantee under the condition that does not connect terminal resistance, makes many online serial communication trouble to the suggestion engineering installer inserts terminal resistance. Through this termination, not only can realize the serial communication of many online groups, simultaneously, also can remind the debugging personnel to notice the installation of terminal resistor, if do not install terminal resistor, then the communication between each unit module in the whole many online groups will unable the completion.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic diagram of the serial communication bus connections of a modular air conditioning system;

FIG. 2 is an exploded view of the modular air conditioning system of the present invention;

FIG. 3 is a schematic cross-sectional view of the serial communication bus connection device of the modular air conditioning system of the present invention;

fig. 4 is a schematic structural diagram of a first wire pressing main body of the serial communication bus wiring device of the modular air conditioning system of the present invention;

FIG. 5 is a schematic structural diagram of a second wire-pressing main body of the serial communication bus wiring device of the modular air conditioning system of the present invention;

fig. 6 is a schematic structural view of a third wire pressing main body of the serial communication bus wiring device of the modular air conditioning system of the present invention; and

fig. 7 is a schematic diagram illustrating a first wire pressing device compressing function of the serial communication bus connection device of the modular air conditioning system according to the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The utility model discloses a serial communication bus termination is not restricted to and uses in modular air conditioning system, and it can be applied to the condition of any multi-connected unit serial communication.

As shown in fig. 2 to fig. 3, the serial communication bus connection device of the present embodiment mainly includes a housing composed of a first half shell 11 and a second half shell 12, and an incoming copper sheet 16, an outgoing copper sheet 17, and a motherboard copper sheet 18 located in the housing. The shell is provided with an incoming line wiring port 111, an outgoing line wiring port 112 and a main board line wiring port 113. The wiring terminal inserted from the wire inlet wiring port 111 is conducted with the wire inlet copper sheet 16; the wiring terminal inserted from the outgoing wiring port 112 is conducted with the outgoing copper sheet 17; the connection terminals inserted from the main board wire connection ports 113 are electrically connected to the main board copper sheet 18. Moreover, when the wire inlet wiring port 111 is inserted into the wiring terminal, the wire outlet copper sheet 17 and the mainboard copper sheet 18 are changed from a disconnected state to a connected state; when the outgoing line wiring port 112 is inserted into the wiring terminal, the outgoing line copper sheet 17 and the outgoing line copper sheet 17 are changed from the off state to the on state.

When the wiring terminal of the incoming line is connected from the incoming line wiring port 111, the incoming line can be conducted with the incoming line copper sheet 16, and meanwhile, the outgoing line copper sheet 17 can be conducted with the mainboard copper sheet 18; when the wire outgoing wiring port 112 is connected with a wire outgoing wiring terminal, the wire outgoing and the wire outgoing copper sheet 17 can be conducted, and meanwhile, the wire incoming copper sheet 16 and the wire outgoing copper sheet 17 can be conducted. Therefore, when the incoming line wiring port 111 and the outgoing line wiring port 112 are inserted into the wiring terminals, the incoming line copper sheet 16, the outgoing line copper sheet 17 and the mainboard copper sheet 18 are conducted with each other, that is, all the incoming lines and the outgoing lines of the unit module mainboard of the modular multi-connected unit are conducted; otherwise, the three will not be conducted. The setting makes the serial communication of the multi-connected unit generate faults under the condition of not connecting with the terminal resistor, and prompts engineering installation personnel to access the terminal resistor, thereby avoiding the phenomena of intermittent communication, good communication and bad communication when the multi-connected unit operates.

In order to change the outgoing copper sheet 17 and the motherboard copper sheet 18 from the off state to the on state when the incoming line wiring port 111 is inserted into the wiring terminal, in this embodiment, corresponding contacts are respectively disposed on the outgoing copper sheet 17 and the motherboard copper sheet 18, and other alternative modes may also be adopted. For example, at least one of the outgoing line copper sheet 17 and the motherboard copper sheet 18 can be pushed, so that the outgoing line copper sheet 17 and a part of the motherboard copper sheet 18 are in direct contact when the incoming line wiring port 111 is inserted into the wiring terminal.

As shown in fig. 3, in this embodiment, a part of the outgoing line copper sheet 17 close to the incoming line wiring port 111 is opposite to the main board copper sheet 18, and the opposite parts of the outgoing line copper sheet 17 and the main board copper sheet 18 are respectively and correspondingly provided with a first contact 23 and a second contact 24, when the wiring terminal is not inserted into the incoming line wiring port 111, the first contact 23 and the second contact 24 are in an off state, and when the wiring terminal is inserted into the incoming line wiring port 111, the first contact 23 and the second contact 24 are in an on state.

In this embodiment, a first wire pressing device is arranged inside the housing, and the first wire pressing device can not only realize the compression between the wiring terminal of the incoming wire and the incoming wire copper sheet, but also realize the contact between the first contact 23 and the second contact 24. The first wire pressing device of the present embodiment is described in detail below with reference to fig. 2 to 4 and 7.

As shown in fig. 2 to 3, the first crimping device specifically includes a first crimping body 13 and a first crimping screw 20. The first wire pressing body 13 includes a first front end opening portion at the front end and a first rear end opening portion at the rear end. In this application, the direction "forward" refers to the direction in which the wiring ports on the housing are located, and "rearward" is opposite "forward". The first front end opening portion is opposite to the wire inlet and wiring port 111, the wire inlet copper sheet 16 extends backwards from the upper portion of the wire inlet and wiring port 111, namely the first front end opening portion and penetrates out of the first rear end opening portion, and a part of wire outlet copper sheet 17 comprising a first contact 23 and a part of mainboard copper sheet 18 comprising a second contact 24 are sequentially arranged below the first wire pressing main body 13 and the wire inlet and wiring port 111.

Fig. 4 shows a specific example of the first clip body 13, which includes a first frame 131 of a rectangular first frame 131 having front and rear ends open, a first top wall on which a first screw hole 133 is provided, and a first bottom wall whose inner wall surface is provided with a projection 132 facing the first screw hole 133. The first crimping screw 20 has a screw head floatingly engaged in the first screw head groove 114 inside the housing, a screw rod cooperatively engaged with the first screw hole 133, and the first crimping body 13 linearly moves in the housing along the axial direction of the first crimping screw 20 as the first crimping screw 20 rotates. In order to facilitate the operation of the first and second and third pressing screws, which will be described later, a driver inlet 115 into which a screwdriver is inserted is provided at a corresponding position on the housing.

When the wire inlet wiring port 111 is not inserted into the wiring terminal, the first contact 23 below the wire outlet copper sheet 17 has a certain gap with the second contact 24 above the mainboard copper sheet 18, and the gap of the gap is preferably about 0.5 mm. At this time, the first contact 23 and the second contact 24 are in an open state.

When the incoming line wiring port 111 is inserted into the wiring terminal, due to the existence of the protrusion 132, the gap between the incoming line copper sheet 16 and the protrusion 132 needs to be adjusted accordingly when the insertion gap is insufficient. The adjustment manner is as shown in fig. 7, when the first wire pressing screw 20 is rotated, the first wire pressing screw 20 has no linear motion and the first wire pressing body 13 has no rotational motion due to the limitation of the first screw head groove 114 and the surrounding shell structure of the first wire pressing body 13, so that the first wire pressing body 13 can be driven to move downward, and at this time, the gap between the wire inlet copper sheet 16 and the protrusion 132 is gradually enlarged until the wire connecting terminal is inserted into the gap. When the terminal is pressed, the terminal can be pressed by the combined action of the first crimping screw 20 and the protrusion 132 only by slightly rotating the first crimping screw 20 to move the first crimping body 13 upward. Meanwhile, the part of the outgoing line copper sheet 17, which is located on the first line pressing main body 13, moves downwards due to the downward movement of the first line pressing main body 13, and when the incoming line wiring port 111 is inserted into the wiring terminal of the incoming line, the protrusion 132 is pressed to slightly lower the bottom wall of the first line pressing main body 13, so that the corresponding part of the outgoing line copper sheet 17 is pushed to move downwards, the first contact 23 below the outgoing line copper sheet 17 is contacted with the second contact 24 above the mainboard copper sheet 18, and the outgoing line copper sheet 17 is conducted with the mainboard copper sheet 18.

The serial communication bus wiring device of the embodiment further comprises an insulation spring 19, and the insulation spring 19 is arranged between the part of the outgoing line copper sheet 17 and the mainboard copper sheet 18 which are oppositely arranged. The insulation spring 19 can play an insulation role on one hand, and prevent the outgoing line copper sheet 17 and the mainboard copper sheet 18 from being conducted through the spring, and on the other hand, can prevent the outgoing line copper sheet 17 and the mainboard copper sheet 18 from being conducted under the condition that no wiring terminal is inserted into the incoming line wiring port 111.

In the embodiment, in order to realize that the outgoing copper sheet 17 and the incoming copper sheet 16 are changed into the conducting state from the disconnecting state when the outgoing wiring port 112 is inserted into the wiring terminal, the incoming copper sheet 16 and the outgoing copper sheet 17 are not in contact when the outgoing wiring port 112 is not inserted into the wiring terminal, but the wiring terminal inserted into the outgoing wiring port 112 is respectively conducted with the incoming copper sheet 16 and the outgoing copper sheet 17, so that the incoming copper sheet 16 and the outgoing copper sheet 17 are changed into the conducting state from the disconnecting state when the wiring terminal is inserted into the outgoing wiring port 112. In this embodiment, in order to compress the terminals inserted into the outgoing line port 112 and the outgoing copper sheet 17, the serial communication bus connection device further includes a second line pressing device disposed in the housing. More specifically, the second crimping device includes a second crimping body 14 and a second crimping screw 21 that operates the second crimping body 14.

As shown in fig. 3, the second wire pressing body 14 has a second front end opening portion and a second rear end opening portion, the second rear end opening portion is opposite to the wire outlet port 112, the wire inlet copper sheet 16 penetrates through the first rear end opening portion and continues to extend through the second front end opening portion and into the second wire pressing body 14, and the wire outlet copper sheet 17 extends from below the first wire pressing body 13 to the second rear end opening portion.

Fig. 5 shows a specific example of the second crimping body. The second wire pressing body 14 includes a second frame body having front and rear ends opened, the second frame body includes a second top wall 141, a bottom support 143 parallel to the second top wall 141, and a side connector 142 connecting the second top wall 141 and the bottom support 143, and a second screw hole 144 is provided in the second top wall 141. The second crimping screw 21 has a screw head floatingly engaged in the second screw head groove 116 inside the housing, a screw rod is engaged in the second screw hole 144, and the second crimping body 14 is linearly moved in the housing along the axial direction of the second crimping screw 21 in accordance with the rotation of the second crimping screw 21.

As shown in fig. 2, in the present embodiment, the outgoing copper sheet 17 is provided with a shape that is bent upward and then bent backward on one side of the outgoing wire port 112, and is abutted to each corresponding portion of the second wire pressing main body 14, and the contact portions of the incoming copper sheet 16 and the outgoing copper sheet 17 with the corresponding wire connecting terminals are both located above the wire connecting terminals. The advantage of setting up like this is, can reduce the deformation of the copper sheet 17 of being qualified for the next round of competitions in the casing, moreover when screwing the second line ball screw 21 simultaneously with the copper sheet 16 of being qualified for the next round of competitions with the copper sheet 17 of being qualified for the next round of competitions the wiring mouth one end and binding post compress tightly together of being qualified for the next round of competitions. Of course, as long as the close contact between the outgoing copper sheet 17 and the connection terminal can be ensured, the shape of the outgoing copper sheet 17 can be set to other shapes according to the requirement, for example, one end of the outgoing wiring port of the outgoing copper sheet 17 can be set below the connection terminal, and the good contact between the outgoing copper sheet 17 and the connection terminal can be maintained by the elasticity of the copper sheet.

The second wire pressing device is pressed in a manner similar to that of the first wire pressing device, and the second wire pressing body 14 is moved upward by rotating the second wire pressing screw 21, so that the wire inlet copper sheet 16, the wire outlet copper sheet 17 and the corresponding wire connecting terminal are pressed between the second wire pressing screw 21 and the bottom support 143.

As shown in fig. 2 to 3, the serial communication bus connection device further includes a third line pressing device for pressing the connection terminal of the main board line against the main board copper line 18. More specifically, the third crimping device includes a third crimping body 15 and a third crimping screw 22 that operates the third crimping body 15. The third wire pressing body 15 includes a third front end opening portion and a third rear end opening portion, the third rear end opening portion is opposite to the main board wire connection port 113, and the main board copper sheet 18 extends backward from below the first wire pressing body 13 through the third front end opening portion to the third rear end opening portion.

As shown in fig. 6, the third wire crimping body 15 includes a rectangular third frame 151 with front and rear ends open, the third frame 151 having a third top wall provided with a third screw hole 152; the third crimping screw 22 has a screw head floatingly engaged in the third screw head groove 117 inside the housing, a screw rod cooperatively engaged with the third screw hole 152, and the third crimping body 15 linearly moves in the housing along the axial direction of the third crimping screw 22 as the third crimping screw 22 rotates. The pressing mode of the third wire pressing device is similar to that of the first wire pressing device, and is not repeated.

The gap reserved for the insertion of the terminal by the first wire pressing body 13, the second wire pressing body 14 and the third wire pressing body 15 is selected to be about 1.5mm, which is adapted to the thickness of the terminal.

For the serial communication bus connection device of the above embodiment, to use the connection structure shown in fig. 1, two identical connection devices are required for the main board of each unit module, and since each bit has three connection ports, two connection devices are used side by side to achieve the intended purpose.

When the serial communication bus wiring device leaves a factory, the wiring device and the mainboard of the unit module can be connected through a communication line, only two wiring ports are reserved for engineering installation personnel, and therefore the wire can be freely led in and out during connection. And a terminal resistor is required to be connected to the last unit module, otherwise, the whole multi-connected unit cannot realize communication failure, so that the functions of reminding and helping unit communication debugging are achieved.

The serial communication bus wiring device of the embodiment can be used in each unit module in a multi-connected unit, for example, each air conditioner in a modular air conditioning system, so that the communication between the unit module and a mainboard and a next unit module of a previous unit module is realized, the normal operation of the communication can be ensured, a basis is provided for debugging the communication device, and the condition that a terminal resistor is not connected is avoided to a certain extent.

As can be seen from the above description, the above-mentioned embodiments of the present invention achieve the following technical effects: under the condition that the terminal resistor is not connected or damaged, the serial communication of the multi-connection line is failed, and therefore engineering installation personnel are prompted to access or check the terminal resistor. Not only can realize the serial communication of many online groups, can remind the debugging personnel to notice the installation and the inspection of terminal resistor simultaneously to, if do not install terminal resistor, the communication between each unit module in the whole many online groups will be unable to be accomplished.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A serial communication bus connection device, comprising:

the cable connector comprises a shell, wherein the shell is provided with an incoming cable connecting port (111), an outgoing cable connecting port (112) and a main board cable connecting port (113);

the incoming line conducting plate (16) is positioned in the shell, and a wiring terminal inserted from the incoming line wiring port (111) is communicated with the incoming line conducting plate (16);

the outgoing line conducting plate (17) is positioned in the shell, and a wiring terminal inserted from the outgoing line wiring port (112) is communicated with the outgoing line conducting plate (17);

the main board conducting plate (18) is positioned in the shell, and a wiring terminal inserted from the main board wiring port (113) is communicated with the main board conducting plate (18); wherein,

the wire inlet wiring port (111) is inserted into the wiring terminal, and the wire outlet conducting plate (17) and the mainboard conducting plate (18) are changed into a conducting state from a disconnecting state;

and the outgoing line wiring port (112) is inserted into the wiring terminal, and the incoming line conducting strip (16) and the outgoing line conducting strip (17) are changed into a conducting state from a disconnecting state.

2. The serial communication bus connection device of claim 1, wherein a portion of the outgoing conducting strip (17) close to the incoming connection port (111) and a portion of the main board conducting strip (18) are disposed opposite to each other, and a first contact (23) and a second contact (24) are correspondingly disposed on the outgoing conducting strip (17) and the main board conducting strip (18) respectively, and when the incoming connection port (111) is inserted into the connection terminal, the first contact (23) and the second contact (24) are changed from an off state to an on state.

3. The serial communication bus connection device according to claim 2, wherein the gap between the first contact (23) and the second contact (24) in the open state is 0.5 mm.

4. The serial communication bus connection device of claim 2, further comprising: and the insulating spring (19) is arranged between the outgoing line conducting plate (17) and the main board conducting plate (18) which are oppositely arranged.

5. The serial communication bus connection device of claim 1, wherein the connection terminal inserted into the outgoing line connection port (112) is respectively conducted with the incoming line conductive plate (16) and the outgoing line conductive plate (17).

6. The serial communication bus connection device according to any one of claims 1 to 5, further comprising:

and the first wire pressing device is positioned inside the shell and used for pressing the wiring terminal inserted from the wire inlet wiring port (111) onto the wire inlet conducting sheet (16).

7. The serial communication bus connection device of claim 6, wherein the first wire pressing device comprises:

the first wire pressing main body (13) comprises a rectangular first frame body (131) with a first front end opening part and a first rear end opening part, the first front end opening part is opposite to the wire inlet wiring port (111), the wire inlet conducting plate (16) extends backwards from the first front end opening part and penetrates out of the first rear end opening part, a part of the wire outlet conducting plate (17) and a part of the mainboard conducting plate (18) are sequentially arranged below the first wire pressing main body (13), the first frame body (131) comprises a first top wall and a first bottom wall, a first threaded hole (133) is formed in the first top wall, and a protruding part (132) facing the first threaded hole (133) is arranged on the inner wall surface of the first bottom wall;

the screw head of the first pressing line screw (20) is connected in a first screw head groove (114) in the shell in a floating mode, the screw rod is connected with the first threaded hole (133) in a matched mode, and the first pressing line main body (13) moves linearly in the shell along the axial direction of the second pressing line screw (20) along with the rotation of the first pressing line screw (20).

8. The serial communication bus connection device of claim 7, wherein the first wire pressing body (13) is provided with a gap of 1.5mm for the insertion of the connection terminal.

9. The serial communication bus connection device according to any one of claims 1 to 5, further comprising:

and the second wire pressing device is positioned in the shell and used for pressing the wiring terminal inserted from the wire outlet wiring port (112) onto the wire outlet conducting strip (17).

10. The serial communication bus connection device of claim 9, wherein the second line pressing device comprises:

the second wire pressing main body (14) comprises a second frame body with a second front end opening part and a second rear end opening part, the second rear end opening part is opposite to the wire outgoing wiring port (112), the wire incoming conducting strip (16) extends from the upper part of the wire incoming wiring port (111) to pass through the second front end opening part and extend into the second wire pressing main body (14), the wire outgoing conducting strip (17) extends from the lower part of the wire incoming wiring port (111) to the second rear end opening part backwards, the second frame body comprises a second top wall (141), a bottom supporting part (143) parallel to the second top wall (141), and a side connecting part (142) connecting the second top wall (141) and the bottom supporting part (143), and a second threaded hole (144) is formed in the second top wall (141);

the screw head of the second line pressing screw (21) is connected in a second screw head groove (116) in the shell in a floating mode, the screw rod is connected with the second threaded hole (144) in a matched mode, and the second line pressing main body (14) moves linearly in the shell along the axial direction of the second line pressing screw (21) along with the rotation of the second line pressing screw (21).

11. The serial communication bus connection device according to any one of claims 1 to 5, further comprising:

and the third wire pressing device is positioned in the shell and used for pressing the wiring terminal inserted from the main board wire connection port (113) onto the outgoing conducting strip (18).

12. The serial communication bus connection device of claim 11, wherein the third line pressing device comprises:

the third wire pressing main body (15) comprises a rectangular third frame body (151) with a third front end opening part and a third rear end opening part, the third rear end opening part is opposite to the main board wire wiring port (113), the main board conducting strip (18) extends backwards from the lower part of the wire inlet wiring port (111) to the third rear end opening part through the third front end opening part, the third frame body (151) is provided with a third top wall, and a third threaded hole (152) is formed in the third top wall;

and the screw head of the third line pressing screw (22) is connected in a third screw head groove (117) in the shell in a floating mode, the screw rod is connected with the third threaded hole (152) in a matched mode, and the third line pressing main body (15) moves linearly in the shell along the axial direction of the third line pressing screw (22) along with the rotation of the third line pressing screw (22).