초록 ▼

An exemplary rotating mechanism for positioning a rotation angle of a second body relative to a first body is provided. The first body includes a pair of sidewalls. The second body includes a pair of connecting arms rotatably connected to the sidewalls. The rotating mechanism includes a pair of posi

An exemplary rotating mechanism for positioning a rotation angle of a second body relative to a first body is provided. The first body includes a pair of sidewalls. The second body includes a pair of connecting arms rotatably connected to the sidewalls. The rotating mechanism includes a pair of positioning gears rotatably connected to the sidewalls, a brake slidably connected to the first body, and a button fastened to the brake. Each of the positioning gears includes a positioning block extending out of the sidewalls. The brake is driven to brake the positioning gears by the button when the button is moved towards the sidewalls. The positioning block is fixed at a predetermined position to position the rotation angle of the second body when the positioning gears are braked.

대표청구항 ▼

1. A rotating mechanism rotatably connecting a first body with a second body, the first body comprising a pair of sidewalls, the second body comprising a pair of connecting arms, each of the connecting arms comprising a positioning bump, the rotating mechanism comprising: a pair of positioning gears

1. A rotating mechanism rotatably connecting a first body with a second body, the first body comprising a pair of sidewalls, the second body comprising a pair of connecting arms, each of the connecting arms comprising a positioning bump, the rotating mechanism comprising: a pair of positioning gears rotatably connected to one side of the respective sidewalls, and each of the positioning gears comprising a positioning block extending through the respective sidewall by passing through a guiding grooves;a brake slidably connected to the first body along a direction parallel to the sidewalls; anda button fastened to the brake and slidable between a first position closing the sidewalls and a second position away from the sidewalls;wherein the connecting arms are rotatably connected to another side of the respective sidewalls opposite to the positioning gears, the positioning bump engages with the positioning block to position the rotation angle of the second body, the brake is pulled away from the positioning gears by the button to drive the positioning gears to rotate with the positioning bump when the button stays at the first position, the brake is driven to engage with the positioning gears and brake the rotation of the positioning gears by the button when the button is moved to the second position, and the positioning block is fixed at a predetermined position to position the rotation angle of the second body when the positioning gears are braked by the brake. 2. The rotating mechanism of claim 1, further comprising a positioner fixed to the first body and located between the pair of sidewalls, wherein the positioner and the brake are correspondingly located at two opposite sides of the positioning gears, the positioner comprises a fastening part connecting with the first body and a pair of engaging parts extending from two opposite sides of the pair of fastening parts, and each of the engaging parts comprises a positioning projection extending from an end of the engaging part away from the fastening part. 3. The rotating mechanism of claim 2, wherein each of the positioning gears further comprises a positioning surface, an assembly surface parallel to the positioning surface, a circumferential surface connecting the positioning surface with the assembly surface, and a plurality of teeth formed on the circumferential surface, and the positioning projection engages with the teeth of the positioning gears to restrict the positioning gears rotate an angle between two adjacent teeth each time. 4. The rotating mechanism of claim 3, wherein the positioning block is formed on the positioning surface, the positioning block comprises a dividing pillar and a pair of positioning grooves correspondingly defined at two opposite sides of the dividing pillar, and each of the positioning bumps engage with the positioning block by inserting in the corresponding positioning groove to position the rotation angle of the positioning gears. 5. The rotating mechanism of claim 3, wherein the positioning block is curved and extends along a part of a circumferential periphery of the positioning surface. 6. The rotating mechanism of claim 2, wherein the brake comprises a braking part and a controlling part perpendicularly extending from a middle of the braking part, the braking part comprises a pair of braking projections correspondingly extending from two opposite ends of the braking part, each of the braking projections comprises a plurality of braking teeth formed on a front surface of each braking projection away from the controlling part, and the braking teeth engage with the teeth of the positioning gears to brake the rotation of the positioning gears when the brake is driven to contact with the positioning gears. 7. The rotating mechanism of claim 6, wherein the brake further comprises a hook formed at the middle of the braking part, the rotating mechanism further comprises a spring, one end of the spring is fastened to the fastening part, and the other end of the spring is connected to the hook. 8. The rotating mechanism of claim 6, wherein the brake defines at least one elongated sliding through hole in the controlling part, the sliding through hole extends along a direction perpendicular to the braking part, and the brake is slidably connected to the first body by at least one bolt passing through the sliding through hole and screwing into a fastening block formed on the first body. 9. The rotating mechanism of claim 8, wherein the button comprises a main body and a positioning pole extending from the main body, the main body comprises a controlling projection extending out of the first body via a button through hole defined in the first body, the positioning pole comprises a positioning protrusion, and the positioning protrusion inserts in one of a pair of positioning holes corresponding to the first position and the second position to position the button at the first position or the second position. 10. An electronic device comprising: a first body comprising a pair of sidewalls; a second body comprising a pair of connecting arms and each of the connecting arms comprising a positioning bump;a rotating mechanism for rotatably connecting the first body with the second body comprising:a pair of positioning gears rotatably connected to one side of the respective sidewalls, and each of the positioning gears comprising a positioning block extending through the respective sidewall by passing through a guiding groove;a brake slidably connected to the first body along a direction parallel to the sidewalls; anda button fastened to the brake and slidable between a first position closing the sidewalls and a second position away from the sidewalls;wherein the connecting arms are rotatably connected to another side of the respective sidewalls opposite to the positioning gears, the positioning bump engages with the positioning block to position the rotation angle of the second body, the brake is pulled away from the positioning gears by the button to drive the positioning gears to rotate with the positioning bump when the button stays at the first position, the brake is driven to engage with the positioning gears and brake the rotation of the positioning gears by the button when the button is moved to the second position, and the positioning block is fixed at a predetermined position to position the rotation angle of the second body when the positioning gears are braked by the brake. 11. The electronic device of claim 10, wherein each of the sidewalls comprises an inner surface and an outer surface and defines a connecting hole in the outer surface and a guiding groove passing through the outer surface and the inner surface, the connecting arms are rotatably connected to the outer surface by inserting in the connecting hole, the positioning gears are rotatably connected to the inner surface, and the positioning block extends out of the first body by passing through the guiding groove. 12. The electronic device of claim 10, further comprising a positioner fixed to the first body and located between the pair of sidewalls, wherein the positioner and the brake are correspondingly located at two opposite sides of the positioning gears, the positioner comprises a fastening part connecting with the first body and a pair of engaging parts extending from two opposite sides of the pair of fastening parts, and each of the engaging parts comprises a positioning projection extending from an end of the engaging part away from the fastening part. 13. The electronic device of claim 12, wherein each of the positioning gears further comprises a positioning surface, an assembly surface parallel to the positioning surface, a circumferential surface connecting the positioning surface with the assembly surface, and a plurality of teeth formed on the circumferential surface, and the positioning projection engages with the teeth of the positioning gears to restrict the positioning gears rotate an angle between two adjacent teeth each time. 14. The electronic device of claim 13, wherein the positioning block is formed on the positioning surface, the positioning block comprises a dividing pillar and a pair of positioning grooves correspondingly defined at two opposite sides of the dividing pillar, and each of the positioning bumps engage with the positioning block by inserting in the corresponding positioning groove to position the rotation angle of the positioning gears. 15. The electronic device of claim 13, wherein the positioning block is curved and extends along a part of a circumferential periphery of the positioning surface. 16. The electronic device of claim 12, wherein the brake comprises a braking part and a controlling part perpendicularly extending from a middle of the braking part, the braking part comprises a pair of braking projections correspondingly extending from two opposite ends of the braking part, each of the braking projections comprises a plurality of braking teeth formed on a front surface of each braking projection away from the controlling part, and the braking teeth engage with the teeth of the positioning gears to brake the rotation of the positioning gears when the brake is driven to contact with the positioning gears. 17. The electronic device of claim 16, wherein the brake further comprises a hook formed at the middle of the braking part, the rotating mechanism further comprises a spring, one end of the spring is fastened to the fastening part, and the other end of the spring is connected to the hook. 18. The electronic device of claim 16, wherein the brake defines at least one elongated sliding through hole in the controlling part, the sliding through hole extends along a direction perpendicular to the braking part, and the brake is slidably connected to the first body by at least one bolt passing through the sliding through hole and screwing into a fastening block formed on the first body. 19. The electronic device of claim 18, wherein the button comprises a main body and a positioning pole extending from the main body, the main body comprises a controlling projection extending out of the first body via a button through hole defined in the first body, the positioning pole comprises a positioning protrusion, and the positioning protrusion inserts in one of a pair of positioning holes corresponding to the first position and the second position to position the button at the first position or the second position.