Abstract: Provided is a resistance device of a fitness machine comprising a wind drag unit and a magnetic resistance unit. The wind drag unit includes an air volume adjusting disc. The magnetic resistance unit includes a guide rail disc, a metal ring sheet, at least one magnetic seat, and at least one guide post. The guide rail disc has a guide disc rail through which the guide post penetrates. The magnetic seat is used to generate magnetic resistance with the metal ring sheet, and the magnetic seat has a magnetic seat rail. The guide post is connected to the air volume adjusting disc, penetrates through the guide disc rail, and extends into the magnetic seat rail. The guide post moves in the magnetic seat rail with rotation of the air volume adjusting disc to drive the magnetic seat to pivotally rotate relative to the guide rail disc.

Abstract: Provided is a resistance device of a fitness machine comprising a wind drag unit and a magnetic resistance unit. The wind drag unit includes an air volume adjusting disc. The magnetic resistance unit includes a guide rail disc, a metal ring sheet, at least one magnetic seat, and at least one guide post. The guide rail disc has a guide disc rail through which the guide post penetrates. The magnetic seat is used to generate magnetic resistance with the metal ring sheet, and the magnetic seat has a magnetic seat rail. The guide post is connected to the air volume adjusting disc, penetrates through the guide disc rail, and extends into the magnetic seat rail. The guide post moves in the magnetic seat rail with rotation of the air volume adjusting disc to drive the magnetic seat to pivotally rotate relative to the guide rail disc.

Abstract: The present disclosure discloses an exercise bike capable of folding and changing at multiple angles. The exercise bike includes a base unit, a stand unit pivotally connected to a front end of the base unit, and a first resistance unit and a second resistance unit arranged on the stand unit and suitable for providing resistance for limbs when moving. The stand unit includes a lower riser that rotates in a first angle range relative to the base unit, and an upper riser that rotates in a second angle range relative to the lower riser.

Abstract: A foldable treadmill includes a chassis, a running platform, a dashboard, a dashboard bracket and two support rods. Each of two sides of a front portion of the chassis is pivotally connected with a pin shaft. The two pin shafts are parallel to each other. An end of each pin shaft is fixedly connected with a hook, and hook ends of the two hooks can be clamped into clamp positioning slots on the two support rods, respectively, with rotation of the two support rods. The two pin shafts are driven to rotate or reset synchronously through a linkage mechanism so that the two pin shafts drive the hook ends of the hooks to be separated from or clamped into the clamp positioning slots, respectively.

Abstract: The present disclosure discloses an exercise bike capable of folding and changing at multiple angles. The exercise bike includes a base unit, a stand unit pivotally connected to a front end of the base unit, and a first resistance unit and a second resistance unit arranged on the stand unit and suitable for providing resistance for limbs when moving. The stand unit includes a lower riser that rotates in a first angle range relative to the base unit, and an upper riser that rotates in a second angle range relative to the lower riser.

Abstract: A foldable treadmill includes a chassis, a running platform, a dashboard, a dashboard bracket and two support rods. Each of the both sides of the front portion of the chassis is pivotally connect with a pin shaft. Two pin shafts are parallel to each other. An end of each pin shaft is fixedly connected with a hook, and hook ends of two hooks can be clamped into the clamp positioning slots on the two support rods, respectively with rotation of the two support rods. Two pin shafts are driven to rotate or reset synchronously through a linkage mechanism so that the two pin shafts drive the hook ends of the hooks to be separated from or clamped into the clamp positioning slots, respectively. The folding operation speed of the treadmill is fast, the action is reliable, and the storage space is effectively reduced when the treadmill is idle.

Abstract: A trampoline with hanging seat units that allows elastic ropes to be mounted easily, comprises a frame, leg tubes, a bouncing unit, hanging seat units and elastic rope rings. The bouncing unit is hung on the frame and comprises a piece of bouncing cloth and connection belts. The hanging seat units are connected with the connection belts and each comprises a body, a through groove penetrating through the body, a connection body, an extension section, and a clamping and abutting section extending towards the bouncing cloth. The body, the extension section and the clamping and abutting section of each hanging seat unit define a clamping space. Each connection belt penetrates through the corresponding through groove. The bouncing unit and hanging seat units are connected through the elastic rope rings. The ends of each elastic rope ring are arranged in the corresponding connection belt and clamping space in a sleeved mode.

Abstract: A trampoline with hanging seat units that allows elastic ropes to be mounted easily, comprises a frame, leg tubes, a bouncing unit, hanging seat units and elastic rope rings. The bouncing unit is hung on the frame and comprises a piece of bouncing cloth and connection belts. The hanging seat units are connected with the connection belts and each comprises a body, a through groove penetrating through the body, a connection body, an extension section, and a clamping and abutting section extending towards the bouncing cloth. The body, the extension section and the clamping and abutting section of each hanging seat unit define a clamping space. Each connection belt penetrates through the corresponding through groove. The bouncing unit and hanging seat units are connected through the elastic rope rings. The ends of each elastic rope ring are arranged in the corresponding connection belt and clamping space in a sleeved mode.

Abstract: A SMD-type LED with high heat dissipation efficiency and high power includes a base with a post arranged and integrated on the center thereof and a slot on top of the post. At least one contact hole is arranged on bottom of the base for connecting with an external heat sink so as to achieve better heat dissipation. The slot is used for accommodating a LED chip that is electrically connected with a circuitry extension device through two electrical contacts. The LED chip is electrically connected with the circuitry extension device directly while it also connects with the base for heat dissipation, thus the structure for electricity conduction is separated from the structure for heat dissipation.

Abstract: There is disclosed a controller for power protection. The controller may comprise a switch for activating a power converter. The controller may comprise a circuit coupled with the switch. The circuit may open the switch when an input voltage decreases below a first voltage. The circuit may close the switch when the input voltage increases above a second voltage. The second voltage may be greater than the first voltage.

Abstract: An overvoltage protection device has a voltage-limiting region parallel to its central junction to produce a transverse junction breakdown. The spacing between the voltage-limiting region and the central junction defines the breakdown voltage. Via varying the size and location of the voltage-limiting region, the protection device can has various-breakdown voltages and lower breakover currents. Thereby, the sensitivity of the protection device can be improved.