# US 12,222,777 B2 · Mainboard mounting mechanism and electric device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,777 B2 - Document ID: US12222777B2 - Status: Granted - Kind: B2 - Application number: 17/944,129 - Filed: 2022-09-13 - Published: 2023-05-04 - Granted: 2025-02-11 - Earliest claimed: 2021-10-28 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Jianguo Zeng - Web page: https://patentgrep.com/patent/US12222777B2 ## CPC - G06F 1/181: {Enclosures (for portable computers G06F1/1613)} - G06F 1/184: Mounting of motherboards - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A mainboard mounting mechanism is provided for use with a chassis box, the chassis box defining an accommodating space, the mainboard mounting mechanism including: a tray; a positioning post, positioned in the mounting area; and a rod assembly, rotatably connected to the tray, wherein the rod assembly drives the tray to slide toward the positioning post so as for the mainboard to be at a disengagement position, and the rod assembly drives the tray to slide away from the positioning post for the mainboard to be at an engagement position. ## Claims ### Claim 1 A mainboard mounting mechanism for use with a chassis box, the chassis box defining an accommodating space, the mainboard mounting mechanism comprising: a tray, slidably arranged in the accommodating space and divides the accommodating space into a mounting area and a sliding area along a sliding direction, the tray defines a holding space for holding a mainboard; a positioning post, positioned in the mounting area; a guide member, with a positioning hole accommodating the positioning post, the guide member including a guide base with the position hole and a guide rail extending from the guide base, and the tray is slidably connected with the guide rail; and a connecting rod assembly, rotatably connected to the tray, wherein the connecting rod assembly drives the tray to slide toward the positioning post so as for the mainboard to be at a disengagement position, and the connecting rod assembly drives the tray to slide away from the positioning post for the mainboard to be at an engagement position. ### Claim 2 (depends on 1) The mainboard mounting mechanism of claim 1, wherein the connecting rod assembly is positioned outside of the holding space. ### Claim 3 (depends on 1) The mainboard mounting mechanism of claim 1, wherein the positioning post is received through the positioning hole for the guide member to be connected to the chassis box. ### Claim 4 (depends on 1) The mainboard mounting mechanism of claim 1, wherein the tray comprises a tray floor and a tray wall, the tray floor and the tray wall together define the holding space. ### Claim 5 (depends on 1) The mainboard mounting mechanism of claim 1, wherein the tray comprises a tray floor and a plurality of tray walls together defining the holding space, the plurality of tray walls include a proximal tray wall and a distal tray wall opposing the proximal tray wall, and wherein the guide rail extend from the proximal tray wall toward the distal tray wall. ### Claim 6 (depends on 5) The mainboard mounting mechanism of claim 5, wherein an ear extends from the proximal tray wall and the connecting rod assembly is positioned between the guide base and the ear. ### Claim 7 (depends on 1) The mainboard mounting mechanism of claim 1, wherein the connecting rod assembly comprises: a first part, including a first end, a second end, and a mounting portion positioned between the first end and the second end; and a second part, rotatably connected to the mounting portion of the first part. ### Claim 8 (depends on 7) The mainboard mounting mechanism of claim 7, wherein the first end is rotatably connected to a guide base through a first rod. ### Claim 9 (depends on 7) The mainboard mounting mechanism of claim 7, wherein the second part includes a third end and a fourth end, and the third end is rotatably connected to the mounting portion. ### Claim 10 (depends on 7) The mainboard mounting mechanism of claim 7, wherein the mounting portion divides the first part into a first segment and a second segment, the first segment is defined between the first end and the mounting portion, the second segment is defined between the mounting portion and the second end, when the first part rotates clockwise, an angle between the second part and the first segment gradually increases, and an angle between the second part and the second segment gradually decreases, and when the first part rotates counterclockwise, the angle between the second part and the first segment gradually decreases, and the angle between the second part and the second segment gradually increases. ### Claim 11 (depends on 7) The mainboard mounting mechanism of claim 7, wherein a first buckle is present on the first part, and a second buckle is present on the tray, when the mainboard is at the engagement position, the first buckle is buckled with the second buckle. ### Claim 12 An electronic device, comprising: a chassis box and a mainboard mounting mechanism, the chassis box defining an accommodating space, and the mainboard mounting mechanism comprising: a tray, slidably arranged in the accommodating space and divides the accommodating space into a mounting area and a sliding area along a sliding direction, the tray defines a holding space for holding a mainboard; a positioning post, positioned in the mounting area; a guide member, with a positioning hole accommodating the positioning post, the guide member including a guide base with the position hole and a guide rail extending from the guide base, and the tray is slidably connected with the guide rail; and a connecting rod assembly, rotatably connected to the tray, wherein the connecting rod assembly drives the tray to slide toward the positioning post so as for the mainboard to be at a disengagement position, and the connecting rod assembly drives the tray to slide away from the positioning post for the mainboard to be at an engagement position. ### Claim 13 (depends on 12) The electronic device of claim 12, wherein the connecting rod assembly is positioned outside of the holding space. ### Claim 14 (depends on 12) The electronic device of claim 12, wherein the positioning post is received through the positioning hole for the guide member to be connected to the chassis box. ### Claim 15 (depends on 12) The electronic device of claim 12, wherein the tray comprises a tray floor and a tray wall, the tray floor and the tray wall together define the holding space. ### Claim 16 (depends on 12) The electronic device of claim 12, wherein the tray comprises a tray floor and a plurality of tray walls together defining the holding space, the plurality of tray walls include a proximal tray wall and a distal tray wall opposing the proximal tray wall, and wherein the guide rail extend from the proximal tray wall toward the distal tray wall. ### Claim 17 (depends on 16) The electronic device of claim 16, wherein an ear extends from the proximal tray wall and the connecting rod assembly is positioned between the guide base and the ear. ### Claim 18 A method of holding a mainboard to a chassis box through a mainboard mounting mechanism, the chassis box defining an accommodating space, the method comprising: providing the mainboard mounting mechanism, wherein the mainboard mounting mechanism comprises: a tray, slidably arranged in the accommodating space and divides the accommodating space into a mounting area and a sliding area along a sliding direction, the tray defines a holding space for holding a mainboard; a positioning post, positioned in the mounting area; a guide member, with a positioning hole accommodating the positioning post, the guide member including a guide base with the position hole and a guide rail extending from the guide base, and the tray is slidably connected with the guide rail; and a connecting rod assembly, rotatably connected to the tray, wherein the connecting rod assembly drives the tray to slide toward the positioning post so as for the mainboard to be at a disengagement position, and the connecting rod assembly drives the tray to slide away from the positioning post for the mainboard to be at an engagement position.