Abstract: A temperature difference swimming pool comprises a plurality of spaced apart water curtain controlling devices arranged at a bottom of the pool, and a temperature regulating system. Each of the water curtain controlling devices includes two juxtaposed pipes, a series of intermittent holes is formed in a top surface of the pipes, the pipes each has a closed end, and another end of the pipes is connected to a pump. Water is suctioned by the pump into one pipe and is then spurted out of the other pipe, thus making the water circulate and forming a water curtain. Since the water curtain stops the convection of the water, and the temperature regulating system is used to heat the water in one end of the swimming pool while cooling the water in the other end, thus forming a cold water region and a warm water region in one swimming pool.

Abstract: An optical lens system for taking image has, in order from the object side to the image side: a positive first lens element with a convex object-side surface; a negative plastic second lens element with a concave object-side surface; a negative plastic third lens element with a concave object-side surface; a positive fourth lens element with a concave image-side surface; and an aperture stop located between an object to be photographed and the second lens element. The second lens element is provided with at least one aspheric surface, the third lens element is provided with at least one aspheric surface, and the fourth lens element is formed with inflection points. An on-axis distance between the first and second lens elements is T12, a focal length of the optical lens system for taking image is f, they satisfy the relation: (T12/f)*100>0.7.

Abstract: A staple gun with a safety device and its safety device are disclosed. The staple gun with a safety device comprises a safety device and a staple-floating unit that are installed in a housing of the staple gun. The safety device includes a safety push sheet and a switch. In a middle portion of the safety push sheet is defined an engaging slot along a staple-discharging direction, and the safety push sheet is further provided with a triggering sheet extending from an upper end thereof. The staple-floating unit is movably connected to the safety device and includes a guide sheet, a control knob, and a positioning pin. The positioning pin can be used to drive the safety push sheet and the guide sheet to move downwards to make the safety push sheet and the guide sheet to protrude out of the staple exit synchronously for facilitating exerting the staple-floating function.

Abstract: A multi-angle tool handle including a handle device, a connecting device and a locking unit adapted for connecting an interconnecting element to the handle device. The locking unit is moveable between a first position and a second position. When the locking unit is in the first position, the interconnecting element is able to pivot and slide with respect to the handle device. And when the locking unit is in the second position, the interconnecting element is fixed with respect to the handle device in position.

Abstract: A method for fabricating a sealed cavity microstructure comprises the steps of: forming an insulation layer with a micro-electro-mechanical structure on an upper surface of a silicon substrate, the micro-electro-mechanical structure includes at least one suspended structure and at least one conductive structure between which is disposed a spacer region; after an etching, filling a sacrificial layer into the spacer region and on the surface of the conductive structure; forming holes in the sacrificial layer correspondingly to the conductive structure; depositing a cap layer into the holes and the surface; after removing the sacrificial layer, utilizing the clearance of the cap layer to carry out a further etching to realize the suspension of the micro-electro-mechanical structure; and finally, utilizing a sealing layer to achieve the sealing effect. By such arrangements, the exposure of the micro-electro-mechanical structure can be effectively prevented, and the final package cost can be reduced.

Abstract: A saw tooth screw provides a screw thread divided into a first and a second thread sections. A plurality of slots, inclined with respect to a shank axial line, are disposed on each thread of the first thread section for dividing the thread into a plurality of thread segments, wherein each of the thread segment has a first inclined surface and a second inclined surface on two ends thereof; the first inclined surface is parallel to the second inclined surface. The thread of the second thread section is formed of a saw-tooth-shape by having recesses extending from a shank to an outer edge of the thread for debris of object to exit through the slots, thereby reducing the screwing torsion and increasing the screwing rotation speed.

Abstract: The present invention pertains to a solar powered flower of dynamic simulation comprising a stem, a solar power supplier, a connecting base, a driving unit, a movable tray, and plurality of swinging members as well as petals. Wherein, the connecting base fixed on the top end of the stem and peripherally provided with multiple inlaying slots, in which the swinging member is pivoted. Each swinging member provides an upper arm to install a petal, and a lower arm to pivot the movable tray, on which contacts an output terminal of the driving unit for the movable tray to move up- and downward to motivate the vacillation of the swinging member as a seesaw. The petals then swing conforming to the swinging member to bloom and close achieving a dynamic simulation of the reality.

Abstract: A pair of swimming goggles includes a body having a strap coupling section formed on each of two sides thereof. Each strap coupling section includes front and rear faces, with upper and lower grooves formed in the front face. Each groove includes a slot in an outer end thereof and a through-hole in an inner end thereof. The slots and the through-holes extend from the front face through the rear face. A head strap includes two ends each extending in sequence through one of the slots, one of the grooves, one of the through-holes, the other through-hole, the other groove, and the other slot, with the head strap forming upper and lower clamping sections.

Abstract: A stepper apparatus includes a base, two axle units, two pedal units and a coordinating unit. The base includes a post formed thereon. Each of the axle units includes an axle extended downwards from a flank of the post. Each of the pedal units includes a pedal pivotally connected to the axle of a related one of the axle units. The coordinating unit includes a lever pivotally connected to the post and formed with two ends each connected to a related one of the pedals so that one of the pedals is moved upwards and outwards while the other pedal is moved downwards and inwards.

Abstract: A safety electric connector includes a main housing, a first plug and a second plug. The first and second plugs are in two different types and can be extended or retracted. The main housing has a chamber therein and a pair of socket holes formed on a top surface thereof. The main housing comprises two first conductive arms, two second conductive arms, two switching members and two connecting members therein. The connecting members and the switching members can be connected or disconnected. One of the plugs is moved to switch the switching member for controlling disconnection/connection of the connecting members and the switching members. Accordingly, the plug which is extended alone has a normal converting function. When both the plugs are pushed out simultaneously, only one plug has the converting function and the other plug doesn't conduct electricity. Therefore, the present invention can avoid any electric shock accidents when both plugs are pushed out, ensuring the safety of the connector when in use.

Abstract: A pair of swimming/diving goggles includes a main body and two head strap coupling members respectively provided on two sides of the main body. A board is pivotably mounted in a through-hole in each head strap coupling member. A head strap is extended through the through-hole of each head strap coupling member and around the board. A spacing between the board and the outer end wall of the through-hole of each the head strap coupling member is changeable when the board is pivoted, allowing the head strap to move to adjust a tightening length of the head strap. The head strap exerts a clamping force to clamp the head strap between the board and the outer end wall of the through-hole.

Abstract: An electronic device having a stretchable USB receptacle is provided. An extending connecting cable is added to the USB receptacle on the electronic device. In normal condition, the connecting cable is accommodated in a cable reel to make the USB receptacle accommodated in an accommodating recess of the electronic device to keep consistency of the appearance. In using condition, the USB receptacle may be taken out and used in a needed place by drawing out the connecting cable. This overcomes the disadvantage that the conventional adjacent USB receptacles may be interfered with each other, and the scope of use also increases.