The present invention relates to a companion dog logo light using energy harvesting, and a logo design desired by a customer is replaceable in a logo light body by a companion dog logo light body, and allows a USB port attached to the body to charge the energy harvester. By converting the vibration energy generated during the dog's activity to electric energy to assist the required energy, the ready-made LED lamp does not reflect the user's personality and solves the problem of having to periodically replace the battery. Ready-made LED lamps do not reflect the user's personality, and are intended to solve the problem of periodically replacing the battery. That is, the present invention is implemented by inserting a film paper in front of the light portion when the consumer wants to replace the design so that the logo design desired by the consumer in the safety of the dog can be replaced in the logo light body, and charged with the USB port attached to the body. When charging, connect the mobile phone line to the USB port to charge, and the energy harvester can use the energy of the companion dog logora light body, converting the vibration energy generated when the dog's activity into electrical energy, and converting the necessary energy into the auxiliary dog dog's neck. It is composed of an energy harvester that is connected to and wired to the USB port of the logo light body. Therefore, the present invention allows the logo design desired by the customer to be replaced by the logo light body of the companion dog, and allows charging by the USB port attached to the body, and vibration generated by the energy harvester when the companion dog is active. By converting energy into electrical energy to assist the required energy, a simple ready-made LED light does not reflect the user's personality, and by solving the problem of periodically replacing the battery, the existing simple ready-made LED light improves the user's personality. It does not reflect and has the
