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An object of the present invention is to provide an led gu10 bulb structure, comprising a housing, a support, an LED light source, a light source driving circuit board, a lens, and a cover. The housing has a horn-like shape with a converged end and aflared end, wherein the flared end is formed with an accommodation chamber. The support is arranged underneath the converged end of the housing and is provided with two contacts.

The LED light source is arranged at the accommodation chamber of the housing, and that the light source driving circuit board is arranged at the housing and inside the accommodation chamber, where the light source driving circuit board isconnected with the LED light source and with the contacts of the support, respectively.

The lens is arranged inside the accommodation chamber of the housing, and is located above the LED light source. The cover is engaged with the flared end of the housing.

Further, given that the light source driving circuit board is arranged in the accommodation chamber which is located at the flared end of the housing with a larger space, minimization to the light source driving circuit board, as needed by theconventional art because of limited space, is unnecessary. As such, electronic components on the light source driving circuit board require only a normal dimension. In addition, a convenient assembly can be facilitated, and an improved cooling effectbe obtained.

An improvement on ventilation prevents the light source driving circuit board from being damaged due to the heat produced from per se; nor the problem encountered by the conventional art occurs owing to an undesirable ventilation that the lightsource driving circuit board is confined in a narrow internal space of the support and that the electronic components on the light source driving circuit board may be softened or even melted.

Therefore, the led gu10 bulb structure according to the presentinvention can be more durable and reliable.