Mainboard device

Abstract

A mainboard device can be used for assembling and combining a first M.2 expansion card and a second M.2 expansion card. The circuit board has a combination hole. The mainboard device includes a mainboard having a plurality of mounting holes, a first connector, a second connector, a first fixing unit, an extension module having a plurality of screw holes, a second fixing unit, and a support unit. By the design of the mounting holes of the mainboard, the first M.2 expansion card connected with the first connector can be locked in the corresponding mounting hole according to the length of the first M.2 expansion card. By the design of the screw holes of the extension module, the second M.2 expansion card connected with the second connector can be locked in the corresponding screw hole according to the length of the second M.2 expansion card. The extension module is locked and combined and fixed on the mainboard by the support unit, effectively supporting M.2 expansion cards of different lengths and improving versatility.

Description

[Technical Field]

[0002] This invention relates to a motherboard with an expansion card, and more particularly to a motherboard device. [Background Technology]

[0004] In server systems, the use of M.2 expansion cards compliant with the M.2 interface specification is now common. Therefore, server motherboards typically come pre-configured with M.2 connectors for M.2 expansion cards, usually two. However, since M.2 expansion cards vary in length, a design has been developed that arranges the M.2 connectors parallel to each other on the motherboard, allowing each expansion card to be placed side-by-side to accommodate different card lengths. However, this parallel arrangement of M.2 expansion cards takes up a lot of motherboard space, impacting the motherboard's circuit layout and making it inefficient. Therefore, professionals need to carefully consider and research improvement solutions. [Summary of the Invention]

[0006] The technical problem to be solved by the present invention is to provide a motherboard device with good versatility.

[0007] To solve the aforementioned technical problems, the present invention provides a motherboard device that allows a first M.2 expansion card and a second M.2 expansion card to be assembled and combined. The first M.2 expansion card has a first connecting portion and a first fixing portion located at two opposite ends. The second M.2 expansion card has a second connecting portion and a second fixing portion located at two opposite ends. The motherboard device includes a motherboard, a first connector disposed on the motherboard, a second connector disposed on the motherboard, a first fixing unit, an extension module, a second fixing unit, and a support unit for fixing the extension module.

[0008] The motherboard includes a mounting area, multiple mounting holes located within the mounting area, and a support hole located within the mounting area.

[0009] The first connector is located within the mounting area and is inserted into the first mating portion of the first M.2 expansion card. The second connector is located within the mounting area and is inserted into the first mating portion of the second M.2 expansion card. The height of the second connector is greater than that of the first connector, and the second connector and the first connector are located at opposite ends of the mounting area. The mounting hole is located between the first connector and the second connector. The support hole and the mounting hole closest to the first connector are located on opposite sides of the first connector. One of the mounting holes corresponds to the first M.2 expansion card.

[0010] The first fixing unit includes a first nut detachably fixed to any mounting hole, and a first locking member detachably locked into the first nut. The first locking member includes a first screw head and a first screw rod extending from the first screw head toward the first nut and lockable into the first nut. When the first nut is positioned in the mounting hole corresponding to the first M.2 expansion card, the first screw rod is locked into the first nut, and the first screw head is able to press against the first fixing portion of the first M.2 expansion card toward the first nut.

[0011] The extension module is integrated with the second M.2 expansion card and includes an extension body detachably connected to the second M.2 expansion card, a screw hole through the extension body, and a positioning portion connected to the extension body. The screw hole corresponds to a second fixing portion of the second M.2 expansion card. The positioning portion of the extension module corresponds to a support hole on the motherboard.

[0012] The second fixing unit includes a second nut detachably fixed to a screw hole in the extension module, and a second locking member detachably locked into the second nut. The second locking member includes a second screw head and a second screw rod extending from the second screw head toward the second nut and lockable into the second nut. When the second nut is positioned in the screw hole corresponding to the second M.2 expansion card, the second screw rod is locked into the second nut, and the second screw head presses against the second fixing portion of the M.2 expansion card of the second connector toward the second nut.

[0013] The support unit includes a support nut that is detachably fixed to a support hole in the main board, and a positioning member that is detachably passed through a positioning portion of the extension module and locked into the support nut. The positioning member is used to securely engage the positioning portion of the extension module with the support nut.

[0014] To address the aforementioned technical problems, the present invention provides another motherboard device that allows a first M.2 expansion card and a second M.2 expansion card to be assembled together. The first M.2 expansion card has a first connecting portion and a first fixing portion located at two opposite ends. The second M.2 expansion card has a second connecting portion and a second fixing portion located at two opposite ends. The motherboard device includes a motherboard, a first connector disposed on the motherboard, a second connector disposed on the motherboard, a first fixing unit, an extension module, a second fixing unit, and a support unit for fixing the extension module.

[0015] The motherboard includes a mounting area, a plurality of mounting holes located within the mounting area, and a support hole located within the mounting area.

[0016] The first connector is located within the mounting area and is inserted into the first mating portion of the first M.2 expansion card. The second connector is located within the mounting area and is inserted into the second mating portion of the second M.2 expansion card. The height of the second connector is greater than that of the first connector, and the second connector and the first connector are located at opposite ends of the mounting area. The mounting hole is located between the first connector and the second connector. The support hole and the mounting hole closest to the first connector are located on opposite sides of the first connector. One of the mounting holes corresponds to the first M.2 expansion card.

[0017] The first fixing unit includes a first nut detachably fixed to any mounting hole, and a first locking member detachably locked into the first nut. The first locking member includes a first screw head and a first screw rod extending from the first screw head toward the first nut and lockable into the first nut. When the first nut is positioned in the mounting hole corresponding to the first M.2 expansion card, the first screw rod is locked into the first nut, and the first screw head is able to press against the first fixing portion of the first M.2 expansion card toward the first nut.

[0018] The extension module is integrated with the second M.2 expansion card and includes an extension body detachably connected to the second M.2 expansion card, multiple screw holes passing through the extension body, and a positioning portion connected to the extension body. One of the screw holes corresponds to the second fixing portion of the second M.2 expansion card. The positioning portion of the extension module corresponds to the support hole of the motherboard.

[0019] The second fixing unit includes a second nut detachably fixed to any screw hole of the extension module, and a second locking member detachably locked into the second nut. The second locking member includes a second screw head and a second screw rod extending from the second screw head toward the second nut and lockable into the second nut. When the second nut is positioned in the screw hole corresponding to the second M.2 expansion card, the second screw rod is locked into the second nut, and the second screw head is able to press against the second fixing portion of the second M.2 expansion card toward the second nut.

[0020] The support unit includes a support nut that is detachably fixed to a support hole in the main board, and a positioning member that is detachably passed through a positioning portion of the extension module and locked into the support nut. The positioning member is used to securely engage the positioning portion of the extension module with the support nut.

[0021] Compared to existing technologies, this invention, through the design of the mounting holes on the motherboard and the application of the first nut of the first fixing unit which can be combined with any mounting hole, allows the first nut to be set in the corresponding mounting hole according to the length of the first M.2 expansion card. When the first screw head tightens the first fixing part of the first M.2 expansion card in the direction of the first nut, the first M.2 expansion card is fixed to the motherboard, effectively meeting the requirement of supporting second M.2 expansion cards of different lengths and improving versatility. Furthermore, through the design of the screw hole in the extension module and the application of the second nut which can be combined with any screw hole, the second nut can be set in the corresponding screw hole according to the length of the second M.2 expansion card, and the second screw head is pressed against the second fixing part of the second M.2 expansion card in the direction of the second nut. When the positioning member of the support unit locks the positioning part of the extension module onto the support nut, the second M.2 expansion card and the extension module are firmly fixed on the motherboard, effectively meeting the requirement of supporting second M.2 expansion cards of different lengths and improving versatility. [Attached Image Description]

[0023] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein:

[0024] Figure 1 This is an exploded perspective view illustrating an embodiment of the motherboard device of the present invention, assembling and combining a first M.2 expansion card and a second M.2 expansion card;

[0025] Figure 2 It is a three-dimensional schematic diagram illustrating the connection relationship between a motherboard, a first connector, a first fixing unit and the first M.2 expansion card in this embodiment;

[0026] Figure 3 It is a three-dimensional schematic diagram illustrating the connection relationship between an extension module, a second fixing unit and the second M.2 expansion card in this embodiment;

[0027] Figure 4 It is a 3D diagram, illustrating... Figure 3 In the diagram, the connection between the extension module, the support unit and the motherboard, and the connection between the second M.2 expansion card and the second connector are shown.

[0028] Figure 5 It is a 3D diagram, used for supplementary explanation. Figure 1 ;

[0029] Figure 6 This is a side view illustrating that, in this embodiment, airflow from an air inlet zone blows into the first connector;

[0030] Figure 7This is an exploded perspective view illustrating an embodiment of the motherboard device of the present invention assembled with a first M.2 expansion card and a second M.2 expansion card of another size;

[0031] Figure 8 It is a 3D diagram, used for supplementary explanation. Figure 7 ;and

[0032] Figure 9 This is a side view illustrating that, in this embodiment, airflow from an air inlet zone is blown into the first connector. 【Detailed Implementation Methods】

[0034] Before the invention is described in detail, it should be noted that similar components are represented by the same numbers in the following description.

[0035] See Figure 1 , Figure 2 , Figure 4 and Figure 5 An embodiment of the motherboard device of the present invention allows for the assembly and combination of a first M.2 expansion card 90 and a second M.2 expansion card 94. The first M.2 expansion card 90 has a first connecting portion 91 located at two opposite ends and a first fixing portion 92. The second M.2 expansion card 94 has a second connecting portion 95 located at two opposite ends and a second fixing portion 96. The motherboard device includes a motherboard 1, a first connector 2 disposed on the motherboard 1, a second connector 3 disposed on the motherboard 1, a first fixing unit 4, an extension module 5, a second fixing unit 6, and a support unit 7 for fixing the extension module 5.

[0036] The motherboard 1 includes a mounting area 11, a plurality of mounting holes 12 located in the mounting area 11, and a support hole 13 located in the mounting area 11.

[0037] The first connector 2 is located within the mounting area 11 and can be inserted into the first mating portion 91 of the first M.2 expansion card 90. The second connector 3 is located within the mounting area 11 and can be inserted into the second mating portion 91 of the second M.2 expansion card 90. The height of the second connector 3 is greater than the height of the first connector 2, and the second connector 3 and the first connector 2 are located at opposite ends of the mounting area 11. The mounting hole 12 is located between the first connector 2 and the second connector 3. The support hole 13 and the mounting hole 12 closest to the first connector 2 are located on opposite sides of the first connector 2. One of the mounting holes 12 corresponds to the first M.2 expansion card 90.

[0038] The first fixing unit 4 includes a first nut 41 detachably fixed to any mounting hole 12, and a first locking member 42 detachably locked into the first nut 41. The first locking member 42 includes a first screw head 421 and a first screw rod 422 extending from the first screw head 421 toward the first nut 41 and lockable into the first nut 41. When the first nut 41 is positioned in the mounting hole 12 corresponding to the first M.2 expansion card 90, the first screw rod 422 is locked into the first nut 41, and the first screw head 421 is able to press the first fixing portion 92 of the first M.2 expansion card 90 toward the first nut 41.

[0039] The extension module 5 is integrated with the second M.2 expansion card 94 and includes an extension body 51 detachably connected to the second M.2 expansion card 94, a plurality of screw holes 52 passing through the extension body 51, and a positioning part 53 connected to the extension body 51. One of the screw holes 52 corresponds to the fixing part 96 of the second M.2 expansion card 94. The positioning part 53 of the extension module 5 corresponds to the support hole 13 of the motherboard 1.

[0040] The second fixing unit 6 includes a second nut 61 detachably fixed to any screw hole 52 of the extension module 5, and a second locking member 62 detachably locked into the second nut 61. The second locking member 62 includes a second screw head 621 and a second screw rod 622 extending from the second screw head 621 toward the second nut 61 and locking into the second nut 61. When the second nut 61 is positioned in the screw hole 52 corresponding to the second M.2 expansion card 94, the second screw rod 622 is locked into the second nut 61, and the second screw head 621 can press the second fixing portion 96 of the second M.2 expansion card 94 toward the second nut 61.

[0041] The support unit 7 includes a support nut 71 detachably fixed to a support hole 13 of the main board 1, and a positioning member 72 detachably passing through a positioning portion 53 of the extension module 5 and locking into the support nut 71. The positioning member 72 is used to fix the positioning portion 53 of the extension module 5 to the support nut 71. In this embodiment, the positioning member 72 includes a positioning screw head 721 and a positioning screw rod 722 extending from the positioning screw head 721 toward the support nut 71, passing through the positioning portion 53 of the extension module 5, and locking into the support nut 71. When the support nut 71 is fixed in the support hole 13, the positioning screw rod 722 passes through the positioning portion 53 of the extension module 5 and locks into the support nut 71, thus fixing the positioning portion 53 of the extension module 5 to the support nut 71.

[0042] See Figure 1 , Figure 2 and Figure 5During assembly, first, the first nut 41 is positioned in the mounting hole 12 corresponding to the first M.2 expansion card 90 to be connected to the first connector 2. Then, the connecting portion 91 of the first M.2 expansion card 90 to be connected to the first connector 2 is inserted and connected to the first connector 2. Next, the first screw 422 of the first locking fastener 42 is locked into the first nut 41, and the first screw head 421 is pressed against the fixing portion 92 of the first M.2 expansion card 90 in the direction of the first nut 41. In simple terms, after the first nut 41 is positioned in the corresponding mounting hole 12 according to the length of the first M.2 expansion card 90, when the first M.2 expansion card 90 is inserted into the first connector 2, the first fixing part 92 of the first M.2 expansion card 90 will abut against the first nut 41. Then, by locking the first locking pin 42 into the first nut 41, the first screw head 421 will press the first fixing part 92 of the first M.2 expansion card 90 towards the first nut 41. At this point, the first fixing unit 4 has fixedly attached the first M.2 expansion card 90. Through the design of the mounting hole 12 of the motherboard 1 and the application that the first nut 41 of the first fixing unit 4 can be attached to any mounting hole 12, the first nut 41 can be positioned in the corresponding mounting hole 12 according to the length of the first M.2 expansion card 90, effectively meeting the requirement of supporting first M.2 expansion cards 90 of different lengths. In other words, the mounting holes 12 of the motherboard 1 are distributed in positions that can accommodate the assembly requirements of first M.2 expansion cards 90 of different sizes and lengths.

[0043] See Figure 1 , Figure 3 , Figure 4 and Figure 5Next, the extension module 5 and the second M.2 expansion card 90 are assembled. The second nut 61 of the second fixing unit 6 is placed in the screw hole 52 corresponding to the second M.2 expansion card 94 to be connected to the second connector 3. Then, the second fixing part 96 of the second M.2 expansion card 94 is pressed against the second nut 61, and the second screw 622 of the second locking fastener 62 is locked into the second nut 61. The second screw head 621 is pressed against the second fixing part 96 of the second M.2 expansion card 94 to be connected to the second connector 3 in the direction of the second nut 61. At this time, the assembly and connection of the extension module 5 and the second M.2 expansion card 94 is completed. It should be noted that, in this embodiment, the design of the screw hole 52 of the extension module 5, combined with the second nut 61, allows for the application of any screw hole 52. The second nut 61 can be positioned in the corresponding screw hole 52 according to the length of the second M.2 expansion card 94, and the second screw head 621 can be pressed against the second fixing part 96 of the second M.2 expansion card 94 in the direction of the second nut 61. This effectively achieves the requirement of supporting second M.2 expansion cards 94 of different lengths. In other words, the distribution of the screw holes 52 of the extension module 5 can accommodate the connection requirements of second M.2 expansion cards 94 of different sizes and lengths. In this embodiment, the dimensions of both the first M.2 expansion card 90 and the second M.2 expansion card 94 are 2280 (22mm (width) x 80mm (length)), but this is not a limitation; different sizes of the first M.2 expansion card 90 and the second M.2 expansion card 94 can also be selected. For example, please refer to... Figure 7 , Figure 8 and Figure 9 For example, if the dimensions of the first M.2 expansion card 90 and the second M.2 expansion card 94 are both 22110 (22mm (width) x 110mm (length)), please refer to the assembly operation described above. It will not be repeated here. It is worth mentioning that during assembly, after placing the first nut 41 in the mounting hole 12 corresponding to the length of the first M.2 expansion card 90, the first fixing part 92 of the first M.2 expansion card 90 can be fixed to the first nut 41 using the first fixing unit 4. Similarly, after placing the second nut 61 in the screw hole 52 corresponding to the length of the second M.2 expansion card 94, the second fixing part 96 of the second M.2 expansion card 94 can be fixed to the second nut 6 using the second fixing unit 6, thus completing the assembly of the extension module 5 and the second M.2 expansion card 94.

[0044] It should be noted that, in this embodiment, the design of the screw hole 52 of the extension module 5, combined with the second nut 61, allows for the application of any screw hole 52. The second nut 61 can be positioned in the corresponding screw hole 52 according to the length of the second M.2 expansion card 94, causing the second screw head 621 to press against the second fixing part 96 of the second M.2 expansion card 94 in the direction of the second nut 61. However, this is not a limitation; different implementations can be designed according to product design requirements. For example, the actual use of the second M.2 expansion card 94 can be pre-designed. The length of the second M.2 expansion card 94 is such that only one screw hole 52 is opened in the extension body 51 of the extension module 5 (not shown in the figure), and the screw hole 52 corresponds to the fixing part 96 of the second M.2 expansion card 94. Therefore, as long as the second nut 61 is set in the screw hole 52, the second fixing part 96 of the second M.2 expansion card 94 can be pressed against the second nut 61 and tightened in the direction of the second nut 61 through the second screw head 621 of the second fastener 62.

[0045] Furthermore, in this embodiment, by designing the first connector 2 to be lower in height than the second connector 3 and to accommodate the second connector 3 and the first connector 2 located at opposite ends of the mounting area 11, the first M.2 expansion card 90 and the second M.2 expansion card 94 can achieve the following: Figure 5 The overlapping arrangement shown in the diagram, combined with the first connector 2 and the second connector 3, effectively saves space.

[0046] Incidentally, in this embodiment, the first fixing portion 92 of the first M.2 expansion card 90 has a first recessed edge 93. The first recessed edge 93 of the first M.2 expansion card 90 allows the first screw 422 to pass through and serves to limit the first screw 422. The second fixing portion 96 of the second M.2 expansion card 94 has a second recessed edge 97. The second recessed edge 97 of the second M.2 expansion card 94 allows the second screw 622 to pass through and serves to limit the second screw 622. In other words, when the first M.2 expansion card 90 is inserted into the first connector 2, the first fixing part 92 of the first M.2 expansion card 90 will abut against the first nut 41 and the first concave edge 93 of the first M.2 expansion card 90 will align with the first nut 41. Then, the first screw 422 will pass through the first concave edge 93 of the first M.2 expansion card 90 and lock into the first nut 41, and the first screw head 421 will press the fixing part 92 of the first M.2 expansion card 90 in the direction of the first nut 41. Similarly, when the second fixing part 96 of the second M.2 expansion card 94 abuts against the second nut 61 and the second concave edge 97 of the second M.2 expansion card 94 aligns with the second nut 61, the second screw 622 passes through the second concave edge 97 of the second M.2 expansion card 94 and locks into the second nut 61, and the second screw head 621 presses against the second nut 61 to tighten the second fixing part 96 of the second M.2 expansion card 94 that is to be connected to the second connector 3. In short, the design of the first concave edge 93 of the first M.2 expansion card 90 and the second concave edge 97 of the second M.2 expansion card 94 guides and limits the first screw 422 and the second screw 622 to lock into the first nut 41 and the second nut 61 respectively, facilitating the locking operation.

[0047] Next, see Figure 1 , Figure 4 and Figure 5 The second M.2 expansion card 94 is inserted into the second connector 3 via its second connecting portion 95. At this time, the positioning portion 53 of the extension module 5 corresponds to the support nut 71 that is connected to the support hole 13. Finally, the positioning screw 722 of the positioning member 72 is passed through the positioning portion 53 of the extension module 5 and locked into the support nut 71, thus fixing the positioning portion 53 of the extension module 5 onto the support nut 71. This securely fixes the second M.2 expansion card 90 and the extension module 55 onto the motherboard 1.

[0048] By utilizing the design of the mounting hole 12 on the motherboard 1 and the first nut 41 of the first fixing unit 4, which can be combined with any mounting hole 12, the first nut 41 can be set in the corresponding mounting hole 12 according to the length of the first M.2 expansion card 90. When the first screw head 421 tightens the first fixing part 92 of the first M.2 expansion card 90 in the direction of the first nut 41, the first M.2 expansion card 90 is fixed on the motherboard 1, effectively achieving the requirement of supporting first M.2 expansion cards 90 of different lengths and improving versatility. Furthermore, through the design of the screw hole 52 of the extension module 5 and the application of the second nut 61 which can be combined with any screw hole 52, the second nut 61 can be set in the corresponding screw hole 52 according to the length of the second M.2 expansion card 94, and the second screw head 621 is pressed against the second fixing part 96 of the second M.2 expansion card 94 in the direction of the second nut 61. When the positioning member 72 of the support unit 7 locks the positioning part 53 of the extension module 5 onto the support nut 71, the second M.2 expansion card 94 and the extension module 5 are firmly fixed on the motherboard 1, effectively achieving the requirement of supporting second M.2 expansion cards 94 of different lengths and improving versatility.

[0049] It should also be noted that, in this embodiment, the positioning portion 53 of the extension module 5 has a sheet 531 extending from the extension body 51 away from the corresponding M.2 expansion card 90, a cylinder 532 extending from the sheet 531 towards the support nut 71 and abutting against the support nut 71, and a positioning hole 533 penetrating the sheet 531 and the cylinder 532 and communicating with the support nut 71. When the second coupling portion 95 of the second M.2 expansion card 94 is inserted into the second connector 3, the cylinder 532 of the positioning portion 53 of the extension module 5 abuts against the support nut 71, and the positioning hole 533 of the positioning portion 53 is aligned and communicates with the support nut 71. Therefore, as long as the positioning screw 722 of the positioning member 72 passes through the positioning hole 533 of the extension module 5, it can be locked into the support nut 71, and the positioning portion 53 of the extension module 5 is fixedly coupled to the support nut 71. The cylindrical part 532 of the positioning part 53 of the extension module 5 abuts against the support nut 71, which can help increase the overall support force of the second M.2 expansion card 94 and the extension module 5.

[0050] See Figure 1 , Figure 5 and Figure 6It should be noted that, in this embodiment, the motherboard device includes an air inlet area 8. The first connector 2 is disposed on the motherboard 1 and close to the air inlet area 8. Simply put, because the first connector 2 is close to the air inlet area 8 and its height is lower than that of the second connector 3, airflow can be directed from the first connector 2 to the second connector 3, effectively ensuring the heat dissipation of the first M.2 expansion card 90 and the second M.2 expansion card 94 located between the first connector 2 and the second connector 3.

[0051] In summary, the motherboard device of the present invention, through the design of the mounting hole 12 of the motherboard 1 and the application of the first nut 41 which can be combined with any mounting hole 12, allows the first M.2 expansion card 90 to be locked into the corresponding mounting hole 12 according to its length, in conjunction with the first fixing unit 4, thus achieving the requirement of supporting first M.2 expansion cards 90 of different lengths. Furthermore, through the design of the screw hole 52 of the extension module 5 and the application of the second nut 61 which can be combined with any screw hole 52, the second M.2 expansion card 94 can be locked into the corresponding screw hole 52 according to its length, in conjunction with the second fixing unit 6, and the extension module 5 is locked and fixed to the motherboard 1 by the support unit 7, thus achieving the requirement of supporting second M.2 expansion cards 94 of different lengths and improving versatility.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A motherboard device for assembling a first M.2 expansion card and a second M.2 expansion card, the first M.2 expansion card having a first connecting portion and a first fixing portion located at two opposite ends, the second M.2 expansion card having a second connecting portion and a second fixing portion located at two opposite ends, characterized in that, The motherboard device includes: A motherboard includes a mounting area, a plurality of mounting holes located in the mounting area, and a support hole located in the mounting area; A first connector is disposed on the motherboard and located in the mounting area, the first connector being able to be inserted and engaged with the first mating portion of the first M.2 expansion card; A second connector is disposed on the motherboard and located in the mounting area. The second connector is for insertion and engagement of the second mating part of the second M.2 expansion card. The height of the second connector is higher than the height of the first connector, and the second connector and the first connector are located at opposite ends of the mounting area. The mounting hole is located between the first connector and the second connector. The support hole and the mounting hole closest to the first connector are located on opposite sides of the first connector, respectively. One of the mounting holes corresponds to the first M.2 expansion card. A first fixing unit includes a first nut detachably fixed to any mounting hole, and a first locking member detachably locked into the first nut. The first locking member includes a first screw head and a first screw rod extending from the first screw head toward the first nut and lockable into the first nut. When the first nut is set in the mounting hole corresponding to the first M.2 expansion card, the first screw rod is locked into the first nut and the first screw head can be pressed against the first fixing part of the first M.2 expansion card in the direction of the first nut. An extension module for the second M.2 expansion card includes an extension body detachably attached to the second M.2 expansion card, a screw hole through the extension body, and a positioning part connected to the extension body. The screw hole corresponds to a second fixing part of the second M.2 expansion card, and the positioning part of the extension module corresponds to a support hole of the motherboard. A second fixing unit includes a second nut detachably fixed to a screw hole in the extension module, and a second locking member detachably locked into the second nut. The second locking member includes a second screw head and a second screw rod extending from the second screw head toward the second nut and lockable into the second nut. When the second nut is positioned in the screw hole corresponding to the second M.2 expansion card, the second screw rod is locked into the second nut, and the second screw head is able to press against the second fixing portion of the second M.2 expansion card toward the second nut. A support unit for fixing the extension module includes a support nut that is detachably fixed to a support hole in the main board, and a positioning member that is detachably passed through the positioning part of the extension module and locked into the support nut. The positioning member is used to fix the positioning part of the extension module to the support nut.

2. The motherboard device according to claim 1, characterized in that, The positioning component includes a positioning screw head and a positioning screw rod that extends from the positioning screw head toward the support nut, passes through the positioning part of the extension module, and locks into the support nut. When the support nut is fixed in the support hole, the positioning screw rod passes through the positioning part of the extension module and locks into the support nut, thereby fixing the positioning part of the extension module to the support nut.

3. The motherboard device according to claim 2, characterized in that, The positioning part of the extension module has a sheet extending from the extension body away from the second M.2 expansion card, a cylinder extending from the sheet towards the support nut and abutting the support nut, and a positioning hole passing through the sheet and the cylinder and communicating with the support nut. The positioning screw of the positioning member is passed through the positioning hole of the extension module and locked into the support nut, so that the positioning part is fixedly connected to the support nut.

4. The motherboard device according to claim 1, characterized in that, The first fixing part of the first M.2 expansion card has a first recessed edge, through which the first screw passes and is used to limit the first screw. The second fixing part of the second M.2 expansion card has a second recessed edge, through which the second screw passes and is used to limit the second screw.

5. The motherboard device according to claim 1, characterized in that, It also includes an air inlet area, with the first connector located near the air inlet area.

6. A motherboard device for assembling a first M.2 expansion card and a second M.2 expansion card, the first M.2 expansion card having a first connecting portion and a first fixing portion located at two opposite ends, the second M.2 expansion card having a second connecting portion and a second fixing portion located at two opposite ends, characterized in that, The motherboard device includes: A motherboard includes a mounting area, a plurality of mounting holes located in the mounting area, and a support hole located in the mounting area; A first connector is disposed on the motherboard and located in the mounting area, the first connector being able to be inserted and engaged with the first mating portion of the first M.2 expansion card; A second connector is disposed on the motherboard and located in the mounting area. The second connector is for insertion and engagement of the second mating part of the second M.2 expansion card. The height of the second connector is higher than the height of the first connector, and the second connector and the first connector are located at opposite ends of the mounting area. The mounting hole is located between the first connector and the second connector. The support hole and the mounting hole closest to the first connector are located on opposite sides of the first connector, respectively. One of the mounting holes corresponds to the first M.2 expansion card. A first fixing unit includes a first nut detachably fixed to any mounting hole, and a first locking member detachably locked into the first nut. The first locking member includes a first screw head and a first screw rod extending from the first screw head toward the first nut and lockable into the first nut. When the first nut is set in the mounting hole corresponding to the first M.2 expansion card, the first screw rod is locked into the first nut and the first screw head can be pressed against the first fixing part of the first M.2 expansion card in the direction of the first nut. An extension module for the second M.2 expansion card includes an extension body detachably attached to the second M.2 expansion card, a plurality of screw holes passing through the extension body, and a positioning part connected to the extension body, wherein one screw hole corresponds to the second fixing part of the second M.2 expansion card, and the positioning part of the extension module corresponds to the support hole of the motherboard. A second fixing unit includes a second nut detachably fixed to any screw hole of the extension module, and a second locking member detachably locked into the second nut. The second locking member includes a second screw head and a second screw rod extending from the second screw head toward the second nut and lockable into the second nut. When the second nut is positioned in the screw hole corresponding to the second M.2 expansion card, the second screw rod is locked into the second nut, and the second screw head is able to press against the second fixing portion of the second M.2 expansion card toward the second nut. A support unit for fixing the extension module includes a support nut that is detachably fixed to a support hole in the main board, and a positioning member that is detachably passed through the positioning part of the extension module and locked into the support nut. The positioning member is used to fix the positioning part of the extension module to the support nut.

7. The motherboard device according to claim 6, characterized in that, The positioning component includes a positioning screw head and a positioning screw rod that extends from the positioning screw head toward the support nut, passes through the positioning part of the extension module, and locks into the support nut. When the support nut is fixed in the support hole, the positioning screw rod passes through the positioning part of the extension module and locks into the support nut, thereby fixing the positioning part of the extension module to the support nut.

8. The motherboard device according to claim 7, characterized in that, The positioning part of the extension module has a sheet extending from the extension body away from the second M.2 expansion card, a cylinder extending from the sheet towards the support nut and abutting the support nut, and a positioning hole passing through the sheet and the cylinder and communicating with the support nut. The positioning screw of the positioning member is passed through the positioning hole of the extension module and locked into the support nut, so that the positioning part is fixedly connected to the support nut.

9. The motherboard device according to claim 6, characterized in that, The first fixing part of the first M.2 expansion card has a first recessed edge, through which the first screw passes and is used to limit the first screw. The second fixing part of the second M.2 expansion card has a second recessed edge, through which the second screw passes and is used to limit the second screw.

10. The motherboard device according to claim 6, characterized in that, It also includes an air inlet area, with the first connector located near the air inlet area.

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