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 paint-supplying device (14) for supplying paint to a paint chamber (11) is provided. The paint-supplying device includes an accommodating cavity (143) and a plurality of paint barrels (145). The accommodating cavity is integrally defined with the paint chamber. The accommodating cavity communicates with the paint chamber. The plurality of paint barrels is accommodated in the accommodating cavity and configured for supplying paint to the paint chamber. A paint-spraying system (10) using the present paint-supplying device is further provided.

Abstract: A keypad assembly (20) is described that includes a housing (100) and a keypad (200) connecting with the housing. The housing has a keyhole area (144) formed thereon, and the housing has at least one keyhole (146) defined therein and a groove (148) is placed along a periphery of the keyhole area. The keypad has a key area (201) formed thereon, and the key area has at least one key (202) formed thereon and a projection (204) placed therearound to engage in the groove. A main advantage of the keypad assembly is that it can simplify the configuration of the seal while maintaining a good seal, and it also can reduce the production cost.

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 durable housing with a soft surface device (100) includes a substrate (10), an electrophoresis coating (20) formed on a surface of the substrate, an intermediate coating (30) formed on the electrophoresis coating, and a top coating (40) formed on the intermediate coating and configured for protecting the intermediate coating. The electrophoresis coating is made of a first resin paint. The intermediate coating is made of a second resin paint containing an isocyanate polymer and/or reaction products of the isocyanate polymer with hydroxyl groups. The top coating is made of a third resin paint an isocyanate polymer cross-linked to the second resin paint of the intermediate coating.

Abstract: A cover restricting mechanism (8) is adapted for use in a foldable electronic device (9). The foldable electronic device includes a cover (10). The cover restricting mechanism includes a projection (31), a housing (20), and a stopping element (32). The projection is provided at one end of the cover. The housing has an inner surface and a corresponding cavity. The stopping element is provided at the inner surface of the housing, and, when the foldable electronic device is in an open position the projection abuts the stopping element. The stopping element is made of an elastomeric material and is configured for slowing the movement of the projection and, thus, the cover once abutment occurs.

Abstract: A hinge mechanism includes a main shaft (2), a torsion spring (6) and a housing (8). The main shaft has a first shaft end (20) and an opposite second shaft end (21). The main shaft includes a stopping mechanism (26) provided at the first shaft end. The torsion spring surrounds the main shaft. The torsion spring has two ends and a substantially hollow interior. The housing is cylinder-shaped and hollow, having a first housing end and a second housing end with a shaft-receiving opening. The main shaft and the torsion spring are inserted into the housing. The stopping mechanism stops the main shaft from becoming disassembled from the housing. The main shaft is inserted into the torsion spring and received in the shaft-receiving opening of the housing. Also included is an electronic device having such a hinge mechanism. The hinge mechanism is easily manufactured and has a nice interchangeability.

Abstract: A positioning structure (30) for an accessory keypad assembly (20) is provided. The accessory keypad assembly includes an upper shell (21) and a lower shell (22). The positioning structure includes a first mounting portion (231), a second mounting portion (232), a third mounting portion (233), a first positioning block (234), a second positioning block (235), and an elastic member (236). The third mounting portion extends from the second mounting portion and is located between the first and second mounting portions. The first positioning block is rotatably mounted on the first mounting portion. The second positioning block is rotatably and slidably mounted on the second mounting portion. The elastic member has one end mounted on the third mounting portion and the other end mounted on the second positioning block.

Abstract: A housing (10) with a pattern formed thereon includes a decorative outer wall (12). The decorative outer wall has a plurality of equidistant first grooves (121) and a plurality of second grooves (122) formed therein. Each of the second grooves intersects with at least one of the first grooves. Every two neighboring first grooves and every two neighboring second grooves define one of micro square-based pyramids, micro truncated triangular prisms, and micro frustums of square-based pyramid.

Abstract: A positioning mechanism (100) configured for positioning a keypad (20) on a portable electronic device includes a plurality of retainers (10). Each retainer includes a main portion (11) and a fixing unit (12) formed on the main portion. The main portion includes an engaging surface (112) and an opposite latching surface (114). A protrusion (1121) is formed on the engaging surface, a first positioning surface (1122) corresponding to a first portable electronic device (30) is formed on the protrusion. The retainer is mounted to the keypad via the fixing unit.

Abstract: A holder (35) includes a base (33), an orientation block (36), a located block (37) and two magnets (38, 39). The base includes a mounting portion (40) and a securing portion (50). The orientation block is fixed in the mounting portion. The located block is slidably engaged in the securing portion. One of the magnets is disposed adjacent to the securing portion, the other of the magnets is disposed in the located block. The magnets are attracted to each other and configured for adjusting a distance between the orientation block and the located block.

Abstract: A fastener (35) includes a base (33), an orientation block (36), a located block (37) and two magnets (38, 39). The base includes a mounting portion (40) and a securing portion (50). The orientation block is slidably and rotatably connected to the securing portion. The located block is rotatably engaged in the mounting portion. One of the two magnets is disposed adjacent to the securing portion, the other magnet is disposed in the located block. The two magnets are attracted to each other configured for adjusting a distance between the orientation block and the located block.

Abstract: A rack (300) configured for holding workpieces (50) includes a base unit (30) and a cover unit (40). The base unit includes a plurality of holding members (31). Each holding member includes two parallel holding boards (311, 313) cooperating with each other to hold the workpieces, each holding board defines a plurality of gaps (312, 314) corresponding to the workpieces therein. The cover unit covers on the base unit.

Abstract: A rack (100) configured for holding workpieces is provided. The rack includes a base (10) and a plurality of fixtures (20). The base includes two lateral frames (14) and a fixing frame (16) fitted between the two lateral frames. Each of the lateral frames includes a first stopper (147) and a second stopper (148) mounted thereon. The fixing frame has two fixing poles (164) parallel to the two lateral frames. Each of the two fixing poles has a plurality of latching means (166) mounted thereon in line. The plurality of fixtures rotatably engage with the latching means of the fixing frame and are fitted between the first stopper and the second stopper.

Abstract: A hanging module (100) for holding workpieces (80) thereon includes a pole (30), a plurality of resilient members (20) attached on the pole, and a plurality of retaining members (10) attached on the pole. The resilient members are slidable relative to the pole. Each retaining member is provided apart from each other with at least one resilient member located in-between.

Abstract: An assessment system (100) used to creating an assessment of workpieces includes a database module (40), a connecting module (20), and a server module (30). The database module stores computer aided design (CAD) drawings of the checked workpieces. The database module and the server module are connected to each other via the connecting module. The server module is connected to the database module and includes an inquiry module and a processor module. The inquiry module inquires the CAD drawings of each checked workpiece and acquires relational parameters of the checked workpieces from the CAD drawings. The processor module processes the parameters acquired by the inquiry module, and the server module creates an assessment according to the parameters and data processed by the processor module.

Abstract: An injection mold (20) includes a female mold (22) and a male mold (24). The female mold defines a recess portion (222) therein. The male mold includes a mold core (242) and defines at least one main injection canal (2425) therein. The mold core cooperates with the recess portion to form a cavity (26) communicating with the main injection canal and configured for shaping workpieces. The main injection canal includes an injecting hole (2426) and an ejecting hole (2427) communicating with the injecting hole. The ejecting hole has a size larger than that of the injecting hole and is positioned to be proximate to the cavity.

Abstract: A door hinge pin (20) for a portable electronic device (900) is provided. The door hinge pin includes a lead pin portion (201), a first pin body portion (202), a second pin body portion (204), a third pin body portion (203), and a tail pin portion (205), which connect with each other in such described order. The lead pin portion and the tail pin portion are respectively positioned substantially vertical to the first pin body portion and the third pin body portion. The first pin body portion is located in parallel with the third pin body portion. The first connecting pin portion is unsymmetrical with the second connecting pin portion about a first reference line X1. The first reference line X1 is defined parallel to the first pin body portion and the third pin body portion and located therebetween. Distance spaced between the first reference line X1 and the first pin body portion is substantially the same as that spaced between the first reference line X1 and the third pin body portion.

Abstract: A keypad assembly (20) for use in a portable electronic device (200) is provided. The keypad assembly includes a keypad (205), a light-guiding board (203), at least one light-emitting source (204), a light-shielding member (202). The keypad includes a first peripheral wall. The at least one light-emitting source is disposed proximate to a second peripheral sidewall (2031) of the light-guiding board and respectively aligned with the light-guiding board. The light-shielding member includes a main portion (2021) and at least one extending portion (2022) extending from the main portion. The at least one extending portion is configured for shielding light emitted from the at least one light-emitting source diffusing toward the first peripheral wall.

Abstract: An injection mold (20) includes a female mold (22) and a male mold (24) matingly engageable with the female mold. The female mold has a recess portion (222) defined therein. The male mold includes a mold core (240) mounted thereon corresponding to the recess portion of the female mold. The mold core includes a grating pattern (241) defined thereon and a first injection runner (244). The grating pattern is formed by a plurality of crisscrossed grooves (2412). The first injection runner communicates with at least one of the grooves of the grating pattern. A housing (10) made by the injection mold and method for making the housing by using the injection mold are also provided.