Abstract: A SIM card holder (200) includes a receiving groove (11) defined in a body (10) and a latch module (12). The body defines a receiving groove configured for receiving a SIM card (20) therein and has a bottom surface at the receiving groove. The latch module includes a holding piece (101) extending from the body and located above the receiving groove, and an elastic element is located adjacent to one end of the receiving groove. The holding piece is separated from the bottom surface along a first axis perpendicular to the bottom surface at a distance essentially equal to a thickness of the SIM card, the elastic element is configured for latching the SIM card in the receiving groove along a second axis parallel to the bottom surface and is configured for being downwardly deformable to release the SIM card.

Abstract: A latching mechanism (200) for a surface contact card, used in a portable electronic device, includes a receiving cavity (11) defined in a body (10) and a latch module (12). The body defines a receiving cavity configured for receiving the surface contact card therein, and including a connector disposed in the receiving cavity. The latch module is mounted adjacent the receiving cavity, the latch module including a supporting portion and a rotating bar pivotably supported on the supporting portion. The latch module includes a supporting portion (13) and a rotating bar (300). The rotating bar includes an elastic member surroundingly formed thereon, the elastic member (302) being configured for providing a sufficient friction force to drive the surface contact card to move into or out the receiving cavity upon being pressed against the surface contact card.

Abstract: A hinge mechanism includes a shaft (1), a cam follower (12), a cam (2), an antifriction member (3), a washer (4) and an elastic member (5). The cam follower is fixed relative to the shaft and has a cam follower surface. The cam has a cam surface (24) and a cam hole defined therein. The cam is rotatable relative to the cam follower. The shaft runs through the cam, the washer and the elastic member, in turn. The antifriction member has one end touching the cam and an opposite end touching the washer. The cam surface abuts against the cam follower surface due to the elastic force of the elastic member. As the friction coefficient between the antifriction member and washer is smaller than that between the cam and the washer, the hinge mechanism generates a smaller friction therebetween, so the waste of energy is very small.

Abstract: A hinge assembly (200) includes a retaining member (4), a fixing seat (5), a control member (6), a first spring (7), a follower element (10), a rotating element (20), a second spring (9) and a shaft (30). The first spring provides an elastic force to the control member. The rotating element includes an axis hole having an inner screw thread (4342). The rotating element disposes two protrusions (24). The follower element includes two recesses (15) and two plane portions (16). The second spring provides an elastic force to make the protrusions of the rotating element receive in the recesses of the follower element and resist each other. The shaft defines an outer screw thread (233). The outer screw thread engages with the inner screw thread of the rotating element.

Abstract: A hinge assembly includes a shaft (12), a follower (16), a cam (18), and an urging means. The shaft has a screw portion (122) defined thereon. The follower has a first cam surface (164) formed on one end surface thereof The cam has a second cam surface (184) formed on one end surface opposite to the follower. The cam has a screw hole (182) defined therethrough. The screw hole engages with the screw portion of the shaft. The urging means is configured for providing an urging force which moves the follower along the shaft and makes the first cam surface rotatably engage with the second cam surface of the cam.

Abstract: A chip card retaining mechanism for retaining a chip card (30) mounted in an electronic device is provided. The electronic device includes a housing (10) having a battery compartment (12) defined therein. The chip card retaining mechanism includes a receiving cavity (14) formed on the housing for receiving the chip card therein, and a locking member (20). The receiving cavity has an opening facing the battery compartment of the electronic device. The locking member is movably received in the receiving cavity with a first end thereof extending out of the opening. The locking member includes a resisting portion. The resisting portion is configured for abutting a first end of the chip card. The locking member configured for locking the chip card in the receiving cavity.

Abstract: A hinge mechanism includes a fixed member (20), two rolling elements (40), an elastic member (60), a rotational member (50) and a shaft (30). The fixed member has a flange (201) and a stop portion (202) thereof. Two first hollows (2022) are defined in the end part of the flange. Each rolling element has two rolling portions (402, 403). The rotational member includes a main portion (51) defined two hemisphere second hollows (511), and a middle portion (53) defining two receiving chambers (531) therein for receiving the rolling bodies. The first and second rolling portions of each rolling element are respectively received in the first hollow and the second hollow. The shaft extends through the fixed member, the elastic member and the rotational member. One end of the elastic member resists the rotational member and the other end of the elastic member is fixed in the longitudinal direction of the shaft.

Abstract: A hinge assembly (200) includes a button (3), a retaining member (4), a fixing seat (5), a control member (6), a first spring (7), a follower (10), a cam (30), a second spring (9) and a shaft (20). The button has at least one pushing portion (31). The control member has at least one receiving groove (61), and the pushing portion is received in each receiving groove. Each pushing portion resists the control member. The first spring provides an elastic force to the control member. The cam includes a cam hole having an inner screw thread (342). The second spring provides an elastic force to make the cam and the follower resist each other. The shaft defines an outer screw thread (233). The outer screw thread engages with the inner screw thread of the cam.

Abstract: A hinge assembly (200) includes a retaining member (101), a fixing seat (5), a control member (6), a first spring (7), a follower (300), a cam (400), a second spring (9) and a shaft (20). The button has at least one pushing portion (31). The control member has at least one receiving groove (61), and the pushing portion is received in each receiving groove. Each pushing portion resists the control member. The first spring provides an elastic force to the control member. The cam includes an axis hole having an inner screw thread (4342). The second spring provides an elastic force to make the cam and the follower resist each other. The shaft defines an outer screw thread (233). The outer screw thread engages with the inner screw thread of the cam.

Abstract: A hinge assembly (10) includes a shaft (12), a follower (16), and a driving means. The shaft has a screw portion (122) defined thereon. The follower has a screw hole (164) defined therein. The screw hole engages with the screw portion of the shaft. The driving means is configured for providing a driving force which makes the follower rotate relative to the shaft. The hinge assembly has only three main components, and occupies a relatively small volume. Accordingly, the space required in an application such as a mobile phone is reduced. In addition, that the engagement of the screw portion and the screw hole of the follower can dampen the opening action of the flip cover, thus protecting the flip cover from damage.

Abstract: A hinge assembly (10) includes a shaft (400), a barrel portion (200), and a plurality of roll elements (300). The shaft has an outer screw thread (404) formed at one end thereof. The barrel portion has an inner screw thread (207) and a groove (210) formed in the inner surface thereof. The inner screw thread is threadingly engaged with the outer screw thread of the shaft. The roll elements are received in the groove of the barrel portion and are rotatable relative to the shaft and the barrel portion.

Abstract: A hinge mechanism includes a shaft having an outer screw thread, a rotating cam, a rotating cam having an inner screw thread, a first elastic element, a sleeve having a latching block, a second elastic element, an anchoring block, and a button having a post. The driven cam defines two symmetrical latching grooves. The anchoring block defines a first hole and a second hole. The shaft extends through the rotating cam, the driven cam, the first elastic element, the sleeve, the second elastic element, and the first hole of the anchoring block. The outer screw thread of the shaft engages with the inner screw thread of the rotating cam. The latching block of the sleeve is slidably received in the latching grooves of the driven cam. The post of the button extends through the second hole of the anchoring block and abuts against an end of the sleeve.

Abstract: A hinge assembly (100) is provided for joining a flip cover (204) to a main body (202) of a foldable electronic device. A hinge assembly includes a hinge shaft (10), a follower (12), and a cam (20). The follower has an outer peripheral portion. The outer peripheral portion has opposite two ends. The cam has a cam hole (22) closely receiving the follower therein. Then cam has an inner peripheral portion movably contacting the outer peripheral portion. The outer peripheral portion is in the form of a screw formed by a cross-section of the follower rotated from one end to the other. The inner peripheral potion is rifled to receive the follower.

Abstract: A hinge mechanism (20) includes a mounting member (12), at least one retractable elastic shaft (14) and a rotating member (18). The retractable elastic shaft has two opposite ends. The mounting member is located at one end of the retractable elastic shaft and defines at least one first hollow (125). The rotating member is located at the other end of the retractable elastic shaft and defines at least one second hollow (187). The first and second hollows respectively receive two ends of the retractable elastic shaft. The mounting member is rotatable relative to the rotating member to drive the retractable elastic shaft to move between a first position where the retractable elastic shaft is slantwise to an axis of the rotating member and a second position where the retractable elastic shaft is parallel to the axis of the rotating member. The hinge mechanism is easy to be manufactured.

Abstract: A carrying structure (100) for a portable electronic device (10) includes a snap module (20) and a strap (30) with two connecting ends (301, 302). The portable electronic device has a mounting hole (1012) in one end of the portable electronic device for receiving the snap module and has a strap hole (1013) defined in the other end of portable electronic device. The snap module comprises a pressing element (201), a snap element (202), a knuckle element (203) and an elastic element (204). One strap connecting end is connected to the knuckle element and the other strap connecting end is fixed to the strap hole, the snap element is latched with the knuckle element, the elastic element has a first end resisting the snap element, and an opposite second end resisting the pressing element, the knuckle element and the snap element are unlockable by pressing the pressing element.

Abstract: A hinge assembly for joining a cover to a main body of a folding phone, includes a housing (1), a cam (2), a cam follower (3), a spring (4), and an end cover (5). The cam and the cam follower are received in the housing with a connector (21) of the cam extending through a rear end (11) of the housing. The cam follower has a cylindrical main body (30) with a protrusion (31) extending from each opposite end thereof. The cylindrical main body can move along a cam surface (20) of the cam for being received in valleys (22) of the cam surface while the protrusions sliding in the housing. The end cover is inserted into the housing for locking the hinge components in the housing. The spring is compressively coupled between the cam follower and the end cover.

Abstract: A method for treating a hinge holder includes the following steps: polishing a surface of the hinge holder; degreasing the hinge holder; cleaning the hinge holder; baking the hinge holder; cooling the hinge holder; screen-printing a part of the surface of the hinge holder; and plating the other part of the surface of the hinge holder with chromium or a chromium-containing compound. The plated hinge holder has a layer of chromium or chromium nitride on the surface, which renders the surface of the hinge holder more attractive and more wear-resistant. Therefore, it is not as easily scratched during assembly and frequent use.

Abstract: A battery cover latching assembly (30) is used in a portable electronic device (9). The portable electronic device has a housing (10) and a battery cover (20). The battery cover has a flange (242) extending from one end portion thereof. The housing defines a receiving cavity (18) in one end portion thereof. The battery cover latching assembly includes a button (40) and a wedging block (52). The button has a first wedging surface (4462) formed at one end thereof. The wedging block has a second wedging surface (522) formed at a first end thereof. The button and the wedging block are elastically mounted in the receiving cavity. The first wedging surface mates with the second wedging surface. The flange is releasably mounted with the wedging block.

Abstract: A rotary hinge mechanism (20) includes a connecting element (22), a first hollow fixing element (24), and a second hollow fixing element (26). The connecting element is a hollow cylinder. The connecting element has a first limiting stopper (2224) and a second limiting stopper (2228). The first limiting stopper and the second limiting stopper are respectively formed on two opposite surfaces thereof and circumferentially spaced. The first hollow fixing element has a first abutting block (243) formed on one end surface thereof. The second hollow fixing element has a second abutting block (263) formed on one end surface thereof. The first fixing element is rotatably connected with one end of the connecting element, and the other end of the connecting element is rotatably connected with the second fixing element.

Abstract: A housing mechanism includes a housing, a defending element, and a magnetic unit. The housing has a cavity, and an opening defined in a sidewall of the housing. The opening communicates with the cavity. The defending element is rotatably attached to an inner side of the sidewall adjacent the opening. The magnetic unit is fixed adjacent to the opening and configured for causing the defending element to return to cover the opening by a magnetic force produced by the magnetic unit.