Abstract: A zoom lens includes a lens, a shutter-aperture, a moving barrel and a resisting ring. The lens includes a curved surface. The shutter-aperture includes a diaphragm for allowing light rays passing through and at least three blind holes. The moving barrel includes a bottom plate, a securing portion for securing the lens, at least three protrusions surrounding the securing portion and at least three elastic elements sleeved on the protrusions respectively. The securing portion and the at least three protrusions extend towards the object-side from the bottom plate. The resisting ring is disposed on an end of the moving barrel opposite to the bottom plate. The aperture-shutter is received in the moving barrel and the movement of the aperture-shutter is bounded by the resisting ring. When the zoom lens contracts, the protrusions are received in the blind holes correspondingly and the lens is received in the diaphragm.

Abstract: A zoom lens barrel includes a fixed barrel, a guide barrel received in the fixed barrel, a cam barrel received in the fixed barrel and housing the guide barrel, a zoom barrel sandwiched between the guide barrel and the cam barrel, and a lens cover covering on the zoom barrel. The cam barrel includes a flange radially formed on an end close to the lens cover. The zoom barrel includes a ring portion protruding out from an end close to the fixed barrel. A step surface is formed between the outer side surface of the zoom barrel and that of the ring portion. When the zoom lens barrel is in an unfolded state, the step surface interferingly resists against a bottom surface of the flange, to limit an axial movement between the cam barrel and the zoom barrel.

Abstract: A zoom lens includes a first lens, a first lens barrel, a shutter assembly, and a guide barrel. The first lens barrel houses the first lens. The shutter assembly is positioned on a distal end of the first lens barrel toward an object side of the zoom lens. The guide barrel is received in the first lens barrel and configured for guiding the first lens barrel to move along the optical axis of the zoom lens.

Abstract: A LED lamp with heat dissipation includes a transfer adapter, a heatsink, a heat-conducting plate, a circuit board and a lampshade. The heatsink, the heat-conducting plate and the circuit board are all made of aluminum. A through hole inside the heatsink is provided therein with plural air channels communicating with the outer wall at one end of the heat-dissipating base and formed with air slots. The heatsink has its outer wall disposed with plural heat-dissipating blades having a heat-dissipating recess formed between there and has one end formed with a flange. The heat-conducting plate has one end provided with a recessed groove to be engaged with the flange of the heatsink and another end provided with an accommodating chamber with plural heat-dissipating holes respectively aligned to the air channels of the heatsink. The circuit board is provided thereon with an LED chip.

Abstract: A positioning structure for a table lamp includes a base provided with a connecting stand and a support post with a pivotal seat. The pivotal seat has one side formed with an accommodating chamber and another side bored with an insert hole communicating with the accommodating chamber. An extension rod pivotally assembled with the pivotal seat is secured with fixing member having a support shaft at one side, the support shaft having an outer wall formed with a male thread section and an interior bored with a through hole having an outer end provided with a female thread section. A positioning member made of silica gel is fitted on the support shaft. A nut having a threaded hole and an insert hole is screwed on the support shaft, and a screw. is inserted through the nut and screwed in the female thread section of the extension rod.

Abstract: A flexible speaker structure, includes, a first electret film having a first surface, a second electret film having a second surface, a conductive film positioned between the first electret and the second electret, a first spacer disposed on the first surface for supporting a first electrode, and a second spacer disposed on the second surface for supporting a second electrode. A first interior angle is defined by the first electret and the first spacer, and the first interior angle is between 60 to 80 degrees.

Abstract: A hat having a crown and a brim is provided. A flexible speaker is disposed in or on the brim. The flexible speaker includes a first flexible electrode and a second flexible electrode used for receiving an audio signal. A first electret and a second electret are disposed between the first and the second flexible electrode. A conductive layer is disposed between the first electret and the second electret. After the audio signal is input into the first flexible electrode and the second flexible electrode, the first electret, the second electret and the conductive layer are driven to vibrate.

Abstract: A zoom lens includes a lens, a shutter-aperture, a moving barrel and a resisting ring. The lens includes a curved surface. The shutter-aperture includes a diaphragm for allowing light rays passing through and at least three blind holes. The moving barrel includes a bottom plate, a securing portion for securing the lens, at least three protrusions surrounding the securing portion and at least three elastic elements sleeved on the protrusions respectively. The securing portion and the at least three protrusions extend towards the object-side from the bottom plate. The resisting ring is disposed on an end of the moving barrel opposite to the bottom plate. The aperture-shutter is received in the moving barrel and the movement of the aperture-shutter is bounded by the resisting ring. When the zoom lens contracts, the protrusions are received in the blind holes correspondingly and the lens is received in the diaphragm.

Abstract: A zoom lens includes a substrate, an imaging unit, a stationary lens barrel, a cam lens barrel and a guide lens barrel. The substrate defines a plurality of openings thereon. The imaging unit is attached on the substrate. The stationary lens barrel is mounted on the substrate and surrounding the imaging unit. The cam lens barrel is rotatably received in the stationary lens barrel and movable along the optical axis of the zoom lens as the rotation thereof along the inner circumference of the stationary lens barrel. The guide lens barrel is received in the cam lens barrel and movable axially following the motion of the cam lens barrel, and comprises a plurality of key numbers protruding outwards from the outer circumference corresponding to and received in the openings of the substrate when the zoom lens is positioned in the minimum focal length position.

Abstract: The present invention provides an electret transducer with solar power. The provided electrets transducer includes a solar power supply device, an amplifier circuit having a first input terminal coupled to the solar power supply device and a second input terminal coupled to an audio signal input terminal, and an electret loudspeaker coupled to an output terminal of the amplifier circuit. The amplifier circuit receives a first voltage level via the first input terminal and boosts the first voltage level to a second voltage level, and receives a first audio signal via the second input terminal and amplifies the first audio signal to a second audio signal. The electret loudspeaker coupled to the output terminal of the amplifier circuit receives the second audio signal and outputs a sound corresponding to the second audio signal.

Abstract: A zoom lens includes a substrate, an imaging unit, a stationary lens barrel, a cam lens barrel and a guide lens barrel. The substrate defines a plurality of openings thereon. The imaging unit is attached on the substrate. The stationary lens barrel is mounted on the substrate and surrounding the imaging unit. The cam lens barrel is rotatably received in the stationary lens barrel and movable along the optical axis of the zoom lens as the rotation thereof along the inner circumference of the stationary lens barrel. The guide lens barrel is received in the cam lens barrel and movable axially following the motion of the cam lens barrel, and comprises a plurality of key numbers protruding outwards from the outer circumference corresponding to and received in the openings of the substrate when the zoom lens is positioned in the minimum focal length position.

Abstract: A retractable zoom lens includes a holder, at least one movable barrel assembly received in the holder, a holding frame received in the movable barrel assembly, and a slide barrel engaged with the holding frame. The holding frame can move along the optical axis along with the movement of the movable barrel assembly. The movable barrel assembly is movable along an optical axis of the retractable zoom lens, and the slide barrel is slidable along a direction substantially perpendicular to the optical axis during an object image captured by an image pickup device of the retractable zoom lens.

Abstract: A zoom lens includes a substrate, an imaging unit, a stationary lens barrel, a cam lens barrel and a guide lens barrel. The substrate defines a plurality of openings thereon. The imaging unit is attached on the substrate. The stationary lens barrel is mounted on the substrate and surrounding the imaging unit. The cam lens barrel is rotatably received in the stationary lens barrel and movable along the optical axis of the zoom lens as the rotation thereof along the inner circumference of the stationary lens barrel. The guide lens barrel is received in the cam lens barrel and movable axially following the motion of the cam lens barrel, and comprises a plurality of key numbers protruding outwards from the outer circumference corresponding to and received in the openings of the substrate when the zoom lens is positioned in the minimum focal length position.

Abstract: A retractable zoom lens includes a holder, at least one movable barrel assembly received in the holder, a holding frame received in the movable barrel assembly, and a slide barrel engaged with the holding frame. The holding frame can move along the optical axis along with the movement of the movable barrel assembly. The movable barrel assembly is movable along an optical axis of the retractable zoom lens, and the slide barrel is slidable along a direction substantially perpendicular to the optical axis during an object image captured by an image pickup device of the retractable zoom lens.

Abstract: The present invention provides an intelligent bicycle and the front fork thereof, in which piezoelectric elements are provided on a position of a bicycle front fork or frame having vibration amplitude greater than a set value under a vibration frequency. By converting of direct and converse piezoelectric effect by the designed circuit modules integrated on the front fork or frame, the intelligent bicycle according to the present invention is provided with functions of energy storage and vibration suppression.

Abstract: A vibration reducing golf club includes a club main structure and a plurality of piezoelectric materials. The club main structure includes a club shaft and a ball head and can sustain the mechanical energy resulting from the swing of the club shaft and the collision between the ball head and a golf ball and consequently produces vibration and bending deformation. The piezoelectric materials are connected with conductive wires and adhered to the club shaft. When the club shaft undergoes mechanical deformation, the piezoelectric materials can transform the energy of mechanical deformation into electrical energy, thereby producing a voltage output and then feeding the voltage back to another piezoelectric material, so as to produce a deformation against the vibration direction of the club shaft. Thus, the vibration energy of the club shaft can be consumed. Therefore, the vibration reducing performance can be obtained by reducing the vibration of the club shaft.

Abstract: A solution bottle has a the bottle body with a bottle opening and a cover for tightly sealing the solution bottle. A press portion is formed at a predetermined portion of the cover. Between an interior of the press portion and the bottle body is installed with a small bag for receiving reactant. The small bag serves to isolate the reactant from the solution in the bottle body so that the reactant is well stored therein. If necessary, the small bag is broken by pressing the press portion so that the reactant will mix with the solution. Moreover, by shaking the bottle, the reactant resolves in the solution completely for use.