A double-headed tube structure comprises a tube body, a first tube head, an annular retaining member and a second tube head. The first tube head and a first end portion of the tube body are hermetically connected together. A second end portion of the tube body is sleeved on an outer circumference of the annular retaining member. The second end portion of the tube body, the annular retaining member and the second tube head are hermetically connected together. The annular retaining member communicates with the tube body and the second tube head. The first and second tube heads are sealedly welded at both ends of the tube body by a two-step forming process. Through the annular retaining member, the tube body is not deformed in the two-step forming process, thereby improving the welding and sealing effect.

An illuminable hair attachment assembly for providing remotely controlled illumination includes a hair attachment, which in turn comprises a shell. At least one face of the shell is substantially transparent. A bulb is engaged to the shell and is positioned in the shell. A fastener engaged to the shell can engage a lock of hair. The hair attachment is one of a plurality of hair attachments, at least one of which has a microprocessor, a battery, and a first transceiver engaged to and positioned in the shell. The microprocessor is operationally engaged to the battery and the first transceiver. The shells are selectively mutually couplable so that all the bulbs of mutually coupled hair attachments are operationally engaged to the microprocessor. Programming code positioned on an electronic device of a user and enables the electronic device to signal the microprocessor to selectively actuate the bulbs.

A system for releasably connecting a plurality of interchangeable components in an assembly. The system includes a plurality of units and a plurality of interchangeable components capable of being releasably joined to one or more of the plurality of units. The plurality of units further includes a physical connecting system and a magnetic connecting system for relative positioning of at least one of the plurality of units with at least another one of the plurality of units. The physical connecting system includes a set of physical keys. The set of physical keys includes an indentation and projection on the surface of the unit. The magnetic connecting system includes a plurality of magnetic connectors housed in the interior housing of each of the plurality of units.

A battery powered blow dryer having a novel battery cooling feature to simultaneously cool the batteries and improve hair dryer performance.

A battery powered blow dryer having a novel heating element technology that can be powered by an attached battery pack. The heating element includes an infrared light bulb that emits high heat with relatively low power consumption compared to current methods. The present invention patent also describes a unique configuration of battery cells to optimally perform the task of blow drying hair.

Embodiment provided herein are directed to microneedle patches for agent application on a mammal skin. The microneedle patch may comprise a patch scaffold having a surface, and a plurality of microneedles disposed on the surface. Each of the microneedles may be capable of piercing the skin 50 μm to 1000 μm deep, and comprises a composite material comprising polyvinylpyrrolidone (PVP) and one or more additional copolymers selected from the group consisting of maltose, leucine, and dileucine.

A battery powered blow dryer having a novel battery cooling feature to simultaneously cool the batteries and improve hair dryer performance.

An aluminum roll-on container and a method of manufacturing the same are provided herein where the container retains a roller sphere for applying a product onto an external surface. The roller sphere can both rotate and move within the container, and a chamber is formed between the container and the roller sphere. In a first position of the roller sphere, the chamber forms a continuous volume with the interior volume of the container such that the chamber receives a product stored in the container volume. Then, in a second position, the chamber forms a continuous volume with the external environment such that rotation of the roller sphere transfers the product from the chamber to an external surface. A relationship between the roller sphere and an upper opening of the container allows the roller sphere to be pressed into the container and then retained in the container.

A hair dryer, including: a housing provided with an air intake and an air outlet, and having an air passage communicating the air intake with the air outlet; a fan installed in the air passage for discharging air from the air intake to the air outlet; and a water particle generator installed in the housing for providing water particles in a direction towards the air outlet; where an installing cavity for installing the water particle generator is provided in the housing, the installing cavity has a cold air passage connected to the air intake and a particle outlet for releasing the water particles, and when in operation of the hair dryer, cold air flowing through the cold air passage that carries the water particles generated by the water particle generator is blown out of the particle outlet.

Embodiment provided herein are directed to microneedle patches for agent application on a mammal skin. The microneedle patch may comprise a patch scaffold having a surface, and a plurality of microneedles disposed on the surface. Each of the microneedles may be capable of piercing the skin 50 μm to 1000 μm deep, and comprises a composite material comprising polyvinylpyrrolidone (PVP) and one or more additional copolymers selected from the group consisting of maltose, leucine, and dileucine.