Expansion card fixing device and circuit board module

Abstract

An expansion card fixing device includes a fixing base, a rotating housing, and an elastic element. The rotating housing is rotatably mounted on the fixing base and includes a pressure-receiving part and a limiting part that are linked to each other. The elastic element is disposed between the fixing base and the rotating housing, and the rotating housing is pushed by the elastic element and is normally in a raised position. When the hook of the expansion card presses against the pressure-receiving part, causing the rotating housing to rotate relative to the fixing base, the limiting part rotates to above the hook and limits the hook. At this time, the rotating housing is in a fixed position, and the elastic element accumulates elastic force. When the expansion card is tilted and pulled out of the slot, the hook moves away from below the limiting part, the pressure-receiving part is no longer pushed by the hook, the elastic element releases its elastic force, and the rotating housing returns to the raised position.

Claims

1. An expansion card fixing device, suitable for being disposed beside a slot, so as to fix the hook portion of the expansion card when the insertion portion of the expansion card is inserted into the slot, characterized in that the expansion card fixing device comprises: Fixed base; The rotating housing is rotatably mounted on the fixed base and includes a pressure-receiving part and a limiting part that are linked to each other; An elastic element is disposed between the fixed base and the rotating housing. The rotating housing is pushed by the elastic element and is normally in the lifted position. When the hook of the expansion card presses against the pressure-receiving part, causing the rotating housing to rotate relative to the fixed base, the limiting part rotates above the hook and limits the hook. At this time, the rotating housing is in the fixed position, and the elastic element accumulates elastic force. When the expansion card is tilted and pulled out of the slot, the hook moves away from below the limiting part, the pressure-receiving part is not pushed by the hook, and the elastic element releases the elastic force, causing the rotating housing to return to the lifted position.

2. The expansion card fixing device as claimed in claim 1, wherein the rotating housing includes two guide walls and a guide groove formed between the two guide walls, the pressure-bearing portion is located at the bottom of the guide groove, and the guide groove is configured to guide the hook portion of the expansion card.

3. The expansion card fixing device as claimed in claim 2, wherein the guide groove includes an enlarged opening away from the pressure-bearing portion, and the hook enters the guide groove from the enlarged opening.

4. The expansion card fixing device as claimed in claim 1 further includes a pivot, the main body of the fixing seat includes a first pivot hole and a stop surface located next to the first pivot hole, the rotating housing includes a second pivot hole, the pivot passes through the first pivot hole and the second pivot hole, the elastic member is sleeved on the first pivot hole, the first end of the elastic member abuts against the stop surface, and the second end of the elastic member abuts against the inner wall surface of the rotating housing.

5. The expansion card fixing device as claimed in claim 1, wherein the fixing base includes a main body and a base extending below the main body, the rotating housing covers the main body, the base includes a first segment and a second segment, the second segment being located between the first segment and the main body, and the second segment being larger than the first segment.

6. The expansion card fixing device as claimed in claim 5, wherein the fixing base includes an anti-rotation portion protruding from the side of the base.

7. A circuit board module suitable for connection to an expansion card, comprising: A circuit board includes a slot configured for inserting a connector of an expansion card; and an expansion card retaining device as claimed in any one of claims 1 to 4, disposed on the circuit board and located next to the slot, the expansion card retaining device being configured to retain a hook portion of the expansion card, wherein when the expansion card is not inserted into the slot, the lower edge of the rotating housing of the expansion card retaining device normally has a non-zero angle with the circuit board.

8. The circuit board module of claim 7, wherein the circuit board includes opposing first surfaces, second surfaces, and a mounting hole recessed in the first surface and penetrating the second surface, the mounting base includes a main body and a base extending below the main body, the base including a first segment and a second segment, the second segment being located between the first segment and the main body, the second segment being larger than the first segment, the first segment being located within the mounting hole, and the second segment protruding from the first surface.

9. The circuit board module of claim 8, wherein the mounting base includes an anti-rotation portion protruding from the side of the substrate, the circuit board includes a limiting recess recessed in the first surface and communicating with the mounting hole, the anti-rotation portion being located in the limiting recess.

10. The circuit board module as claimed in claim 8 further includes a locking fastener, the locking fastener extending from the second side through the mounting hole and securing to the substrate.

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