Abstract: A coffee beans roaster includes a machine body. The machine includes a control unit. A roasting body is disposed in the machine body. The roasting body is a tube. The roasting body has an accommodation space therein. An electrothermal film is provided on an outer side of the roasting body. At two conductive electrodes are spaced and disposed on the electrothermal film. Thus, the heat generated by the electrothermal film can be adjusted by the control unit. Raw coffee beans are placed in the accommodation space of the roasting body. Through the electrothermal film, the raw coffee beans can be evenly heated in all directions to shorten the required time and to decrease the consumed power for roasting the raw coffee beans.

Abstract: An electronically operated lock (1) includes a two-part lock unit (2), a latch (5), and a transmission shaft (4). The lock unit includes a base (80), a top cover (20) covering the base, a driving unit (60), a handle assembly (30), and a clutch (50). The driving unit includes a gear plate (64). The gear plate includes a pair of driving protrusions (641). The handle assembly includes a controller shaft (32) fittingly receiving the transmission shaft therein, and a pinion (35). A first annular gear portion (321) is formed on a bottom of the controller shaft. The clutch includes a pair of driven protrusions (521), and a second annular gear portion (56). The driving protrusions engage the driven protrusions to rotate the clutch. The second annular gear portion meshes with the first annular gear portion via the pinion. Accordingly, the latch can be actuated between a locked state and an unlocked state.

Abstract: An electronically-driven lock (1) includes an inner lock unit (2), an outer lock unit (5), a bolt assembly (3) having a latch, and a transmission shaft (4) extending through the bolt assembly to actuate the latch. The inner lock unit includes a base (80), a driving unit (60), a clutch (50), a knob (30), and a top cover (20) covering the base. The driving unit includes a gear plate (64). The gear plate includes a pair of driving protrusions (641). The knob has a mating shaft (32) fittingly receiving the transmission shaft therein. The clutch includes a pair of driven protrusions (541), and defines a generally rectangular mating slot (52) fittingly receiving the mating shaft therethrough. The driving protrusions engage the driven protrusions to rotate the clutch. The clutch accordingly rotates the mating shaft of the knob to rotate the transmission shaft. Thus the latch can be actuated to locked position or unlocked.