Device for producing a reinforcing structure, which comprises a fiber-reinforced strip including a thermoplastic material, on a molded body surface, wherein the device has the following features: - the device comprises a contact pressure unit for pressing the strip onto the molded body surface; - the strip can be positioned between the contact pressure unit and the molded body surface in such a way that a contact pressure portion of the strip can be brought into contact with the contact pressure unit and the molded body surface, with the result that the strip can be subjected to a force in the direction of the molded body surface by means of the contact pressure unit; - the device comprises a translation and/or rotation unit, which is coupled in terms of motion to the molded body and/or to the contact pressure unit, with the result that a motion and/or a rotation of the molded body relative to the contact pressure unit can be achieved, whereby the strip can be applied to the molded body surface, wherein the contact pressure unit moves in a direction of relative motion with respect to the molded body surface, and the strip is pulled in a pulling direction in relation to the contact pressure unit; - the device comprises at least one laser diode array (110, 120) having a multiplicity of laser diodes for irradiating a heating surface of the strip ahead of the contact pressure region of the strip in the pulling direction, and for irradiating a heating surface of the molded body after the contact pressure region in the direction of relative motion; and - the strip can be melted locally in the region of the heating surface thereof and the molded body surface can be melted locally in the region of the heating surface thereof by irradiation by means of the laser diode array (110, 120), thus making it possible to join the strip to the molded body by pressing the strip onto the molded body surface by means of the contact pressure unit, wherein the device is characterized by the following features: - the device is designed such that the laser diode array (110, 120) directly irradiates the heating surface of the strip and the heating surface of the molded body surface or the already formed reinforcing structure; and - the laser diodes of the laser diode array (110, 120) are designed as surface emitters. - the device comprises a contact pressure unit for pressing the strip onto the molded body surface; - the strip can be positioned between the contact pressure unit and the molded body surface in such a way that a contact pressure portion of the strip can be brought into contact with the contact pressure unit and the molded body surface, with the result that the strip can be subjected to a force in the direction of the molded body surface by means of the contact pressure unit; - the device comprises a translation and/or rotation unit, which is coupled in terms of motion to the molded body and/or to the contact pressure unit, with the result that a motion and/or a rotation of the molded body relative to the contact pressure unit can be achieved, whereby the strip can be applied to the molded body surface, wherein the contact pressure unit moves in a direction of relative motion with respect to the molded body surface, and the strip is pulled in a pulling direction in relation to the contact pressure unit; - the device comprises at least one laser diode array (110, 120) having a multiplicity of laser diodes for irradiating a heating surface of the strip ahead of the contact pressure region of the strip in the pulling direction, and for irradiating a heating surface of the molded body after the contact pressure region in the direction of relative motion; and - the strip can be melted locally in the region of the heating surface thereof and the molded body surface can be melted locally in the region of the heating surface thereof by irradiation by means of the laser diode array (110, 120), thus making it possible to join the strip to the molded body by pressing the strip onto the molded body surface by means of the contact pressure unit, - the device is designed such that the laser diode array (110, 120) directly irradiates the heating surface of the strip and the heating surface of the molded body surface or the already formed reinforcing structure; and - the laser diodes of the laser diode array (110, 120) are designed as surface emitters.