Abstract: Disclosed is a pH-sensitive block copolymer obtained by copolymerization of: (a) a polyethylene glycol compound (A); and (b) at least one poly(amino acid) compound selected from the group consisting of a poly(?-amino ester) and poly(amido amine) or a copolymer thereof (B). A method for preparing the same block copolymer, and a polymer micelle type drug composition comprising the pH-sensitive block copolymer and a physiologically active substance that can be encapsulated with the block copolymer are also disclosed. The pH-sensitive block copolymer is obtained by polymerization of a hydrophilic polyethylene glycol compound with a pH-sensitive biodegradable poly(amino acid) compound. Therefore, the pH-sensitive block copolymer can form a micelle structure due to its amphiphilicity and ionization characteristics depending on pH variations, and thus can be used as drug carrier for target-directed drug delivery depending on pH variations in the body.

Abstract: A valve disc for a faucet or a flusher includes a main body and a valve disc. The main body is provided with a water entering passage, a water exiting passage and an electromagnetic valve. The valve disc is fixed inside the main body to separate the main body into an upper water chamber and a lower water chamber. The electromagnetic valve is able to control the pressure of the upper water chamber so as to control the water entering passage and the water exiting passage to be opened or closed. Water rushing into the lower water chamber can be released from a water passage and a water exit of a guiding rod provided on a guiding plate of the valve disc until the valve disc is closed, so the valve disc can be closed quickly.

Abstract: A multiple-electric-eye automatic induction faucet includes two electric eyes installed on the faucet body. The signal emitting directions of the two electric eyes are not paralleled but intersected and formed with included angles, and respectively aligned to the bottom of the basin of a wash stand and passing through the outflow route of the spout of the faucet body. One of the two electric eyes can optionally be turned on and the other will be turned off according to the intensity of the signal received. The electric eye that is turned on can automatically carry out induction and control water to flow out of the spout of the faucet body, having high inducing sensitivity and able to enlarge a detecting and inducing range in height for matching with practical needs in use of water.

Abstract: A manual pressing device for a flusher includes a stop ring, a pressing rod unit, a spring, and a nut. The manual-pressing device is located in a lateral hole of the body of a flusher, normally stopping water in the flusher or pressed to connect a lengthwise hole in the body with a water-exhausting passageway for flushing water. The nut screws with the body to keep the stop ring, the pressing rod unit and the spring stably combined in the lateral hole. When the pressing member of the pressing rod unit fitted with an outer end of the pressing rod is pressed inward, the annular leak recess of the pressing rod unit may communicate with the water exhausting passageway to let water flow therethrough so as to flush water, and releasing the pressing member pressed makes the pressing rod return to its original position to block the water exhausting passageway.

Abstract: A faucet with a connecting structure with a cold and a hot water pipe includes an inlet base formed in a lower portion. The inlet base has a lateral hole, a cold and a hot water passageway for receiving a cold and a hot water pipe therein and communicating with the lateral hole. A bolt extends pivotally in the lateral hole, having two convex faces to face or leave the water passageways to let two, cold and hot, water pipes to fit in the water passageways and then deadlocked or released by the bolt by means of the outer walls of the two convex faces of the bolt if the bolt is rotated forward or backward for a certain preset angle.

Abstract: A manual pressing device for a flusher includes a stop ring, a pressing rod unit, a spring, and a nut. The manual-pressing device is located in a lateral hole of the body of a flusher, normally stopping water in the flusher or pressed to connect a lengthwise hole in the body with a water-exhausting passageway for flushing water. The nut screws with the body to keep the stop ring, the pressing rod unit and the spring stably combined in the lateral hole. When the pressing member of the pressing rod unit fitted with an outer end of the pressing rod is pressed inward, the annular leak recess of the pressing rod unit may communicate with the water exhausting passageway to let water flow therethrough so as to flush water, and releasing the pressing member pressed makes the pressing rod return to its original position to block the water exhausting passageway.

Abstract: A double valve flusher includes a body, a separating plate, an upper and a lower valve base, a movable valve, a film valve, a fixing member, and an electromagnet. An upper leak room is formed between the film valve and the upper valve base. A leak room is formed between the separating plate, the lower valve base and the movable valve contained in a chamber in the body. The upper leak passageway in the upper leak room and the upper valve base is blocked or opened by the core of the electromagnet, thus controlling the film valve in disfiguring to block or open the leak passageway of the leak room and the lower valve base. Then the movable valve is controlled to move up and down to flush or stop flushing water into a urinal where this flusher is positioned.

Abstract: A double valve flusher includes a body, a separating plate, an upper and a lower valve base, a movable valve, a film valve, a fixing member, and an electromagnet. An upper leak room is formed between the film valve and the upper valve base. A leak room is formed between the separating plate, the lower valve base and the movable valve contained in a chamber in the body. The upper leak passageway in the upper leak room and the upper valve base is blocked or opened by the core of the electromagnet, thus controlling the film valve in disfiguring to block or open the leak passageway of the leak room and the lower valve base. Then the movable valve is controlled to move up and down to flush or stop flushing water into a urinal where this flusher is positioned.

Abstract: A faucet with a connecting structure with a cold and a hot water pipe includes an inlet base formed in a lower portion. The inlet base has a lateral hole, a cold and a hot water passageway for receiving a cold and a hot water pipe therein and communicating with the lateral hole. A bolt extends pivotally in the lateral hole, having two convex faces to face or leave the water passageways to let two, cold and hot, water pipes to fit in the water passageways and then deadlocked or released by the bolt by means of the outer walls of the two convex faces of the bolt if the bolt is rotated forward or backward for a certain preset angle.

Abstract: A manual-automatic water faucet includes a shell installed inside with a water intake base, a water outlet valve, an electromagnetic valve, an induction device and a control device. The control device is composed of a valve rod, a spindle and a revolving button. The revolving button is able to actuate the valve rod to rotate or actuate the spindle to shift axially. When the valve rod is actuated to rotate, it can control water temperature, and when the spindle is actuated to shift axially, it can control the faucet to supply water automatically or manually.

Abstract: A manual and automatic flusher includes an infrared sensor added to a conventional manual flusher, and the infrared sensor consists of an electronic eye and an electro-magnetic valve. The electro-magnetic valve has an iron core moved in and out for controlling opening and shutting of a block, and a communicating tube connected between a flow hole of the block and the upper end of a valve body to enable a hand rod and the infrared sensor separately operated by means of the flexibility of the communicating tube, not interfering with each other. Then the flusher can be used by a manual operation or by automatic operation, with a simple structure for manufacturing.

Abstract: A manual-automatic water faucet includes a shell installed inside with a water intake base, a water outlet valve, an electromagnetic valve, an induction device and a control device. The control device is composed of a valve rod, a spindle and a revolving button. The revolving button is able to actuate the valve rod to rotate or actuate the spindle to shift axially. When the valve rod is actuated to rotate, it can control water temperature, and when the spindle is actuated to shift axially, it can control the faucet to supply water automatically or manually.