Since there is no component in the screw cap that can fix the luminous body (i.e. lamp cap) on the integrated circuit board, the lamp cap after the adjustment and focus is usually set directly into the screw cap, and then the outer cover body is clamped and assembled. However, in this clamping and inserting process, it is difficult to control the size of the smelting tool or the processing force, which makes the lamp cap easy to be compressed and deformed by the screw cap, which often causes the laser beam to be out of focus. For fixing parts, it is necessary to go through the steps of lathe, polishing, trial fitting and focusing to adjust the focal length of the laser light to the best angle. However, these structures are not only cumbersome to manufacture and difficult to assemble, but also add to the manufacturing process. the cost of.
The Laser pointer that can prevent the focus shift, mainly includes a pen tip, a hollow tube with a tapered shape at one end, and the material is made of conductive material, and there is an adjustment component in the tube for the pen core set in the tube Make a fixed displacement in a preset position in the pen head, and a threaded seat is extended at the other end; a pen tube is a hollow tube body, and the inner diameter of the tube at one end is provided with a thread relative to the threaded seat of the pen head, and on the outer ring side A clip is connected to the appropriate position, and a push button is provided at the position where the tube body and the switch of the light-emitting module are opposite; a light-emitting module, one side is the electronic parts such as the light-emitting body, and the other side is provided with a switch , A spring is extended outwards at one end of the light-emitting module, and a laser lamp head is set at the other end, and a focusing lens is embedded on the laser lamp; a head cover is provided with a lens at the center of the appropriate position to prevent foreign matter and dust from entering, And two joint seats are extended outwards at the bottom to fit inside the pen barrel; a fixing clip is arranged in the inner ring of the head cover, and the fixing clip is bent by a metal sheet to form a ring-shaped piece. The position is inwardly arranged with a clamping part and other components, so that the above-mentioned laser lamp head with a focusing lens can be fixed in the head cover.