Electronic module and server

Abstract

The present application relates to an electronic module and a server. The electronic module includes a mainboard, a guide seat and an expansion component. The mainboard has an electrical connector. The guide seat includes a seat body and at least one guide structure. The seat body is disposed around the electrical connector of the mainboard. The guide structure protrudes from the seat body. The expansion component includes a circuit board seat, a circuit board and at least one electronic device. The circuit board is disposed on the circuit board seat. The electronic device is mounted on the circuit board. The circuit board seat includes at least one guide portion. The guide structure and the guide portion each have a guide slope. The guide portion of the circuit board seat is guided by the guide slope of the guide structure of the guide seat. The guide slope of the guide portion of the circuit board seat is abutted by the seat body, so as to guide the circuit board to the electrical connector. The circuit board is assembled on the electrical connector.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of server technology, and in particular, to an electronic module and a server. BACKGROUND

[0002] Currently, an electronic device can select and match an expansion component (such as a hard disk component) according to a requirement to improve the performance of the electronic device. The expansion component is electrically connected to a motherboard in a manner that a riser card is plugged into an electrical connector of the motherboard.

[0003] However, in the process of plugging the riser card into the electrical connector of the motherboard, the riser card is not easy to accurately align with the electrical connector of the motherboard, and the condition that the riser card is offset relative to the electrical connector of the motherboard often occurs, which causes the expansion component to easily collide with the electrical connector of the motherboard or electronic elements near the electrical connector, resulting in damage to the motherboard and the need for repair or replacement. Therefore, researchers in the field are currently working to solve the aforementioned problems. SUMMARY

[0004] Therefore, it is necessary to provide an electronic module and a server to avoid the problem of damage to the motherboard in the process of plugging the riser card of the expansion component.

[0005] According to one aspect of the present application, an electronic module is provided, comprising:

[0006] a motherboard having an electrical connector;

[0007] a guide seat comprising a seat body and at least one guide structure, the seat body being arranged around the electrical connector of the motherboard, and the at least one guide structure protruding from the seat body; and

[0008] an expansion component comprising a circuit board seat, a circuit board, and at least one electronic device, the circuit board being arranged in the circuit board seat, and the at least one electronic device being mounted on the circuit board;

[0009] wherein the circuit board seat comprises at least one guide portion, the at least one guide structure and the at least one guide portion each having a guide slope, the at least one guide portion of the circuit board seat being guided by the guide slope of the at least one guide structure of the guide seat, and the guide slope of the at least one guide portion of the circuit board seat being abutted by the seat body to guide the circuit board to the electrical connector, so that the circuit board is assembled to the electrical connector.

[0010] According to another aspect of the present application, a server is provided, comprising:

[0011] a housing having a receiving space; and

[0012] An electronic module is located within the accommodating space. The electronic module includes a motherboard, a guide socket, and an expansion component. The motherboard has an electrical connector. The guide socket includes a base and at least one guide structure. The base is disposed around the electrical connector on the motherboard. The at least one guide structure protrudes from the base. The expansion component includes a circuit board holder, a circuit board, and at least one electronic device. The circuit board is disposed on the circuit board holder, and the at least one electronic device is mounted on the circuit board.

[0013] The circuit board holder includes at least one guide portion. Each of the at least one guide structure and the at least one guide portion has a guide slope. The at least one guide portion of the circuit board holder is guided by the guide slope of the at least one guide structure of the guide seat. The guide slope of the at least one guide portion of the circuit board holder is abutted by the seat body, thereby guiding the circuit board to the electrical connector so that the circuit board is assembled on the electrical connector.

[0014] The aforementioned electronic module and server are positioned around the electrical connector of the motherboard via a guide seat. The guide seat has a guide structure protruding from its body, and the circuit board holder includes a guide portion. During the insertion of the expansion component's circuit board into the motherboard's electrical connector, the guide portion of the circuit board holder is guided by the guide slope of the guide structure, and the guide slope of the circuit board holder is abutted by the body, thus guiding the circuit board to the electrical connector. This ensures the circuit board is assembled onto the connector via the correct path. This reduces the chance of the expansion component colliding with the electrical connector and surrounding electronic components, thereby preventing damage to the motherboard during the insertion of the expansion component's circuit board.

[0015] The above description of the invention and the following description of the embodiments are used to demonstrate and explain the principles of the invention, and to provide a further explanation of the scope of the claims. Attached Figure Description

[0016] Figure 1 This is a partial perspective view of a server in one embodiment of this application.

[0017] Figure 2 for Figure 1 A partial three-dimensional schematic diagram of the server from another perspective in the illustrated embodiment.

[0018] Figure 3 for Figure 2 An exploded view of the expansion components separated from the motherboard in the illustrated embodiment.

[0019] Figure 4 for Figure 3 The exploded view of the guide seat being separated from the motherboard in the embodiment shown.

[0020] Figure 5 for Figure 1 A three-dimensional schematic diagram of the circuit board holder and circuit board of the expansion component in the illustrated embodiment.

[0021] Figure 6 for Figure 5 The illustrated embodiment shows a schematic cross-sectional view of the circuit board holder and circuit board of the expansion component.

[0022] Figures 7 to 10 for Figure 3 The process of assembling the expansion components onto the motherboard in the illustrated embodiment.

[0023] Brief explanation of component symbols:

[0024] 1: Server 10: Chassis

[0025] 11: Storage space; 20: Electronic module

[0026] 21: Motherboard 211: Bearing surface

[0027] 212: Electrical connectors; 213: Electronic components

[0028] 22: Guide seat 221: Seat body

[0029] 2211: Opening hole; 2212: Clearance hole

[0030] 2213: Cable management structure 2214: Card slot

[0031] 222: Guiding structure 2221: Guide ramp

[0032] 23: Expansion Components 231: Circuit Board Base

[0033] 2311: Supporting part; 23111: Operating hole

[0034] 2312: Guide section; 23121: Guide ramp

[0035] 2313: Hook / Latch 23131: Spring Arm

[0036] 23131a: First end 23131b: Second end

[0037] 23132: Card block; 23133: Operating handle

[0038] 23133a: First end; 23133b: Second end

[0039] 2314: Divider section; 23141: Hook structure

[0040] 23142: Separator groove; 2315: Joint.

[0041] 232: circuit board 2321: plug-in portion

[0042] 2322: slot 2323: light-emitting member

[0043] 233: electronic device H1, H2: height

[0044] L: long axis L1, L2: length

[0045] S: short axis A, B, C, D: direction DETAILED DESCRIPTION

[0046] Referring to Figures 1 to 3 , Figure 1 A partial perspective view of a server in an embodiment of the present application is shown. Figure 2 A partial perspective view of a server in an embodiment of the present application is shown. Figure 1 A partial perspective view of a server in an embodiment of the present application is shown. Figure 3 A partial perspective view of a server in an embodiment of the present application is shown. Figure 2 A partial perspective view of a server in an embodiment of the present application is shown.

[0047] In the present embodiment, the server 1 includes a casing 10 and an electronic module 20. The casing 10 has a receiving space 11, and the electronic module 20 is located in the receiving space 11 of the casing 10. The electronic module 20 includes a main board 21, a guide seat 22, and an expansion component 23.

[0048] Next, referring to Figure 3 and Figure 4 . Figure 4 A partial perspective view of a server in an embodiment of the present application is shown. Figure 3 A partial perspective view of a server in an embodiment of the present application is shown.

[0049] The main board 21 has a bearing surface 211 and an electrical connector 212. In addition, the main board 21 can also have a plurality of electronic elements 213, such as but not limited to a capacitor, a resistor, and another electrical connector smaller in size than the electrical connector 212. The electrical connector 212 and the electronic elements 213 are located on the bearing surface 211 of the main board 21, and the electronic elements 213 are located around the electrical connector 212.

[0050] The guiding seat 22 includes a seat body 221 and a plurality of guiding structures 222. The seat body 221 is fixed on the bearing surface 211 of the mainboard 21 by means of screws or clamping, and is located around and surrounds the electrical connector 212. The seat body 221 has an opening 2211, a plurality of accommodating holes 2212, a cable arranging structure 2213, and two clamping grooves 2214. The opening 2211 exposes the electrical connector 212, and the accommodating holes 2212 accommodate the electronic components 213 of the mainboard 21 respectively. The cable arranging structure 2213 is located beside the opening 2211, and is used to arrange cables (not shown). The clamping grooves 2214 will be described in detail in the following paragraphs. The guiding structures 222 protrude from the seat body 221, and are farther away from the bearing surface 211 of the mainboard 21 than the electrical connector 212. That is, the height H1 of the guiding structures 222 relative to the bearing surface 211 of the mainboard 21 is greater than the height H2 of the electrical connector 212 relative to the bearing surface 211 of the mainboard 21 (see Figure 7 ). Two of the guiding structures 222 are located on one side of the long axis L of the electrical connector 212 and opposite to each other, and the other two guiding structures 222 are located on the other side of the long axis L of the electrical connector 212 and opposite to each other. Each of the guiding structures 222 has a guiding slope 2221, and the use of the guiding slope 2221 will be described in detail later.

[0051] It should be noted that the accommodating holes 2212 and the cable arranging structure 2213 are optional structures. If there are no electronic components or cables at the position where the seat body is placed, the accommodating holes and the cable arranging structure can be omitted.

[0052] Next, please refer to Figure 3 , 5 and Figure 6 . Figure 5 shows a perspective view of the circuit board seat and the circuit board of the expansion assembly in the embodiment shown in Figure 1 . Figure 6 shows a sectional view of the circuit board seat and the circuit board of the expansion assembly in the embodiment shown in Figure 5 .

[0053] The expansion assembly 23 is, for example but not limited to, a hard disk assembly. The expansion assembly 23 includes a circuit board seat 231, a circuit board 232, and at least one electronic device 233 (as shown in Figure 1 ). The circuit board seat 231 includes a bearing portion 2311, two guiding portions 2312, two clamping hook portions 2313, a partition portion 2314, and a connecting portion 2315.

[0054] The bearing portion 2311 has an operation hole 23111. Two guide portions 2312 protrude from one side of the bearing portion 2311 and are separated from each other, and each of the two guide portions 2312 has a guide slope 23121. Two hook portions 2313 are connected to the bearing portion 2311 and are separated from each other. The two hook portions 2313 have the same structure, and thus only the structure of one of the hook portions 2313 will be described in detail below. The hook portion 2313 includes a spring arm 23131, a clamping block 23132, and an operation handle 23133. The spring arm 23131 has opposite first and second ends 23131a and 23131b. The first end 23131a of the spring arm 23131 is connected to the bearing portion 2311. The operation handle 23133 has opposite first and second ends 23133a and 23133b. The clamping block 23132 and the first end 23133a of the operation handle 23133 are connected to different sides of the second end 23131b of the spring arm 23131, respectively. The second end 23133b of the operation handle 23133 is farther away from the clamping block 23132 than the first end 23131a of the spring arm 23131. One end of the partition portion 2314 is detachably mounted to the bearing portion 2311 through a connecting portion 2315. The partition portion 2314 has a hook structure 23141 and a plurality of partition grooves 23142. The hook structure 23141 is located at an end of the partition portion 2314 that is away from the connecting portion 2315 and corresponds to the operation hole 23111 of the bearing portion 2311, and the partition grooves 23142 are located between opposite ends of the partition portion 2314.

[0055] In the present embodiment, the circuit board holder 231 is made by a double-material injection molding method. The bearing portion 2311, the guide portions 2312, the hook portions 2313, and the partition portion 2314 of the circuit board holder 231 are made of plastic, and the connecting portion 2315 of the circuit board holder 231 is made of rubber. In this way, the assembly process and the number of parts of the circuit board holder 231 can be reduced. It should be noted that the manufacturing method and the material of the circuit board holder 231 are not intended to limit the present application, but can be adjusted according to requirements.

[0056] The circuit board 232 is fixed to the bearing portion 2311 of the circuit board holder 231, and the hook structure 23141 of the partition portion 2314 of the circuit board holder 231 passes through the circuit board 232 and is clamped to the circuit board 232. The operation hole 23111 of the bearing portion 2311 can be used by a user to pull the hook structure 23141 with a tool or a finger to release the hook structure 23141 from the circuit board 232.

[0057] The circuit board 232 has a connector 2321, multiple slots 2322, and multiple light-emitting elements 2323. The connector 2321 of the circuit board 232 is, for example, a gold finger. Both the connector 2321 of the circuit board 232 and the guide portion 2312 of the circuit board holder 231 protrude from the same side of the support portion 2311, and the length L1 of the connector 2321 protruding from the support portion 2311 is less than the length L2 of the guide portion 2312 protruding from the support portion 2311 (please refer to [reference needed]). Figure 7 These slots 2322 are for inserting electronic devices 233, such as hard drives. These light-emitting elements 2323 are used, for example, to indicate the status of the electronic devices 233, such as their operational status. These light-emitting elements 2323 are respectively located within the partition slots 23142 of the partition portion 2314 of the circuit board base 231, so that the light emitted by these light-emitting elements 2323 does not interfere with each other.

[0058] It should be noted that the circuit board 232 is not limited to having a light-emitting element 2323. In other embodiments, the circuit board may not have a light-emitting element. In such a configuration, the partition and joint of the circuit board holder can be omitted.

[0059] Next, the process of inserting the circuit board 232 of the expansion component 23 into the electrical connector 212 of the motherboard 21 will be described in detail below. Please refer to [link to relevant documentation]. Figures 7 to 10 , Figures 7 to 10 It shows Figure 3 The process of assembling the expansion components onto the motherboard in the illustrated embodiment.

[0060] like Figure 7 and Figure 8 As shown, during the process of inserting the circuit board 232 of the expansion component 23 into the electrical connector 212 of the motherboard 21, the expansion component 23 may be offset along the long axis L (e.g., direction A) and short axis S (e.g., direction B) of the electrical connector 212, so that the expansion component 23 is not inserted in a way that is directly facing the electrical connector 212 of the motherboard 21.

[0061] like Figure 9 and Figure 10As shown, although the expansion assembly 23 is offset relative to the electrical connector 212, during the process of inserting the circuit board 232 of the expansion assembly 23 towards the electrical connector 212 of the host board 21, the guide portion 2312 of the circuit board seat 231 is guided by the guide slope 2221 of the guide structure 222 of the guide seat 22 to move in the reverse direction of the direction B (e.g. the direction D), and the guide slope 23121 of the guide portion 2312 of the circuit board seat 231 is abutted by the seat body 221 to move in the reverse direction of the direction A (e.g. the direction C), thereby guiding the circuit board 232 towards the electrical connector 212, so that the insertion portion 2321 of the circuit board 232 is accurately inserted into the electrical connector 212. At this time, the clamping block 23132 of the clamping portion 2313 of the circuit board 232 is clamped into the clamping slot 2214 of the seat body 221 of the guide seat 22, so as to prevent the circuit board 232 from being detached from the electrical connector 212 of the host board 21. Thus, the operation of inserting the circuit board 232 of the expansion assembly 23 into the electrical connector 212 of the host board 21 is completed.

[0062] When the expansion assembly 23 is to be detached, the operation handle 23133 of the clamping portion 2313 of the circuit board seat 231 can be pressed to drive the elastic arm 23131, so that the clamping block 23132 is detached from the clamping slot 2214 of the seat body 221 of the guide seat 22. Thus, the expansion assembly 23 can be pulled upwards from the host board 21.

[0063] In the present embodiment, by arranging the seat body 221 of the guide seat 22 around the electrical connector 212 of the host board 21, and by arranging the guide structure 222 of the guide seat 22 to protrude from the seat body 221, and by arranging the circuit board seat 231 to include the guide portion 2312, during the process of inserting the circuit board 232 of the expansion assembly 23 into the electrical connector 212 of the host board 21, the circuit board seat 231 of the expansion assembly 23 can be guided by the guide slope 2221 of the guide structure 222 of the guide seat 22, and the guide slope 23121 of the guide portion 2312 of the circuit board seat 231 can be abutted by the seat body 221, so as to correct the offset of the expansion assembly 23 in multiple directions (e.g. the offset in the short axis S and the long axis L of the electrical connector 212 of the host board 21), thereby guiding the circuit board 232 towards the electrical connector 212, so that the circuit board 232 is inserted into the electrical connector 212 along a correct path. Thus, the chance of the expansion assembly 23 colliding with the electrical connector 212 and the electronic elements 213 around the electrical connector 212 can be reduced, so that the host board 21 can be prevented from being damaged during the process of inserting the circuit board 232 of the expansion assembly 23.

[0064] It should be noted that the guide structure 222 of the guide seat 22 is not limited to guiding the expansion assembly 23 to be offset on the short axis S of the electrical connector 212 of the mainboard 21 by the guide slope 2221, and the guide portion 2312 of the circuit board seat 231 is not limited to guiding the expansion assembly 23 to be offset on the long axis L of the electrical connector 212 of the mainboard 21 by the guide slope 23121. In other embodiments, the guide structure of the guide seat and the guide portion of the circuit board seat can be curved surfaces to guide the circuit board seat.

[0065] On the other hand, by the configuration that the guide structure 222 of the guide seat 22 is away from the bearing surface 211 of the mainboard 21 than the electrical connector 212 of the mainboard 21, and the length L1 of the insertion portion 2321 of the circuit board 232 protruding from the bearing portion 2311 of the circuit board seat 231 is less than the length L2 of the guide portion 2312 protruding from the bearing portion 2311, the guide portion 2312 of the circuit board seat 231 of the expansion assembly 23 can be ensured to abut against the guide structure 222 before the circuit board 232 contacts the electrical connector 212 of the mainboard 21, so that the guide structure 222 can guide the circuit board 232 to the correct insertion path, and the chance of the expansion assembly 23 colliding with the electrical connector 212 and the electronic elements around the electrical connector 212 can be further reduced.

[0066] It should be noted that the guide structure 222 of the guide seat 22 is not limited to being away from the bearing surface 211 of the mainboard 21 than the electrical connector 212 of the mainboard 21, and the length L1 of the insertion portion 2321 of the circuit board 232 protruding from the bearing portion 2311 of the circuit board seat 231 is not limited to being less than the length L2 of the guide portion 2312 protruding from the bearing portion 2311. In other embodiments, the guide structure of the guide seat can be flush with the electrical connector of the mainboard, and the insertion portion of the circuit board can be flush with the guide portion of the circuit board seat.

[0067] It should be noted that the number of the guide structure 222 of the guide seat 22 and the guide portion 2312 of the circuit board seat 231 is not intended to limit the present application, but can be increased or decreased according to requirements.

[0068] In the present embodiment, the way of fixing the circuit board 232 to the mainboard 21 is by the snap hook portion 2313 of the circuit board seat 231 being fixed in the card slot 2214, instead of the anti-ejection mechanism integrated in the electrical connector 212 of the mainboard 21. Therefore, when the electrical connector 212 of the mainboard 21 is damaged, only the electrical connector 212 needs to be replaced, and the process and parts required for replacing the anti-ejection mechanism are saved.

[0069] On the other hand, the snap hook portion 2313 of the circuit board seat 231 is an optional structure. In other embodiments, the circuit board seat can have no snap hook portion, and the seat body of the guide seat can correspondingly have no card slot. In such a configuration, the expansion assembly and the mainboard can be fixed only by the friction force of the circuit board being inserted between the electrical connectors.

[0070] According to the electronic module and the server provided by the above-mentioned embodiments, the seat body of the guide seat is arranged around the electrical connector of the host board, the guide seat has the guide structure protruding from the seat body, and the circuit board seat includes the guide part. During the process of inserting the circuit board of the expansion component into the electrical connector of the host board, the circuit board seat of the expansion component is guided by the guide slope of the guide structure of the guide seat, and the guide slope of the guide part of the circuit board seat is abutted by the seat body, so that the expansion component is aligned in multiple directions (such as the short axis and the long axis of the electrical connector of the host board) to guide the circuit board to the electrical connector, so that the circuit board is inserted into the electrical connector in the correct path. In this way, the opportunity of the expansion component colliding with the electrical connector and the electronic elements around the electrical connector can be reduced, so that the host board can be prevented from being damaged during the process of inserting the circuit board of the expansion component.

[0071] In addition, in addition to the guide structure of the guide seat aligning the expansion component in the short axis of the electrical connector of the host board, the guide part of the circuit board seat also aligns the expansion component in the long axis of the electrical connector of the host board, so that the guide structure of the guide seat and the guide part of the circuit board seat can provide multiple direction alignment for the expansion component, and the opportunity of the expansion component colliding with the electrical connector and the electronic elements around the electrical connector can be further reduced.

[0072] In addition, by arranging the guide structure of the guide seat away from the bearing surface of the host board than the electrical connector of the host board, and the length of the insertion part of the circuit board protruding from the bearing part of the circuit board seat is smaller than the length of the guide part protruding from the bearing part, the guide part of the circuit board seat of the expansion component can be abutted to the guide structure before the circuit board contacts the electrical connector of the host board, so that the guide structure guides the circuit board to the correct insertion path, and the opportunity of the expansion component colliding with the electrical connector and the electronic elements around the electrical connector can be further reduced.

[0073] In the present embodiment, the server of the present application can be used for artificial intelligence (AI) operation, edge computing, and can also be used as a 5G server, a cloud server, or a vehicle networking server.

[0074] Although the present application is disclosed with the above-mentioned preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present application, therefore the patent protection scope of the present application should be subject to the scope defined by the claims attached to the present specification.

Claims

1. An electronic module, characterized in that, include: The motherboard has electrical connectors; A guide socket includes a base body and at least one guide structure, the base body being disposed around the electrical connector of the motherboard, and the at least one guide structure protruding from the base body; as well as An expansion component includes a circuit board base, a circuit board, and at least one electronic device, wherein the circuit board is disposed on the circuit board base and the at least one electronic device is mounted on the circuit board; The circuit board holder includes at least one guide portion, and each of the at least one guide structure and the at least one guide portion has a guide slope. The at least one guide portion of the circuit board holder is guided by the guide slope of the at least one guide structure of the guide seat, and the guide slope of the at least one guide portion of the circuit board holder is abutted by the seat body to guide the circuit board to the electrical connector so that the circuit board is assembled on the electrical connector. The circuit board holder includes a support portion connected to the at least one guide portion, and the circuit board is disposed on the support portion; the circuit board has a plug portion, the plug portion and the at least one guide portion protrude from the same side of the support portion, and the length of the plug portion protruding from the support portion is less than the length of the at least one guide portion protruding from the support portion.

2. The electronic module according to claim 1, characterized in that, The motherboard also has a bearing surface, the electrical connector is located on the bearing surface, the base is fixed to the bearing surface of the motherboard, and the at least one guide structure is farther away from the bearing surface of the motherboard than the electrical connector.

3. The electronic module according to claim 1, characterized in that, The number of the at least one guide structure is four, wherein two of the guide structures are located on one side of the electrical connector and the other two of the guide structures are located on the other side of the electrical connector.

4. The electronic module according to claim 1, characterized in that, The guide seat has at least one slot, and the circuit board seat includes a connected support portion and at least one hook portion. The circuit board is disposed on the support portion, and the at least one hook portion is secured to the at least one slot.

5. The electronic module according to claim 4, characterized in that, The at least one latch includes a spring arm, a latching block, and an operating handle. The spring arm has a first end and a second end opposite to each other. The first end of the spring arm is connected to the bearing portion. The operating handle has a first end and a second end opposite to each other. The latching block and the first end of the operating handle are respectively connected to opposite sides of the second end of the spring arm. The latching block is locked in the at least one latching groove. The second end of the operating handle is farther away from the latching block than the first end of the spring arm.

6. The electronic module according to claim 1, characterized in that, The circuit board has multiple light-emitting elements. The circuit board base includes a support portion and a partition portion. The circuit board is disposed on the support portion. The two opposite ends of the partition portion are detachably mounted on the support portion and the circuit board, respectively. The partition portion has multiple partition grooves that are separated from each other. The multiple light-emitting elements are respectively located in the multiple partition grooves.

7. The electronic module according to claim 6, characterized in that, The circuit board base also includes a connecting portion, one end of which is detachably mounted to the supporting portion, and the other end of which has a hook structure that is detachably secured to the circuit board.

8. A server, characterized in that, include: The casing has storage space; as well as An electronic module is located within the accommodating space. The electronic module includes a motherboard, a guide socket, and an expansion component. The motherboard has an electrical connector. The guide socket includes a base and at least one guide structure. The base is disposed around the electrical connector on the motherboard. The at least one guide structure protrudes from the base. The expansion component includes a circuit board holder, a circuit board, and at least one electronic device. The circuit board is disposed on the circuit board holder, and the at least one electronic device is mounted on the circuit board. The circuit board holder includes at least one guide portion, and each of the at least one guide structure and the at least one guide portion has a guide slope. The at least one guide portion of the circuit board holder is guided by the guide slope of the at least one guide structure of the guide seat, and the guide slope of the at least one guide portion of the circuit board holder is abutted by the seat body to guide the circuit board to the electrical connector so that the circuit board is assembled on the electrical connector. The circuit board holder includes a support portion connected to the at least one guide portion, and the circuit board is disposed on the support portion; the circuit board has a plug portion, the plug portion and the at least one guide portion protrude from the same side of the support portion, and the length of the plug portion protruding from the support portion is less than the length of the at least one guide portion protruding from the support portion.

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