Table lamp screw knob injection molding accessories: the cornerstone of building stable lighting

1. The core role of screws in the structural connection of table lamps

(I) Fastening connection of various parts of the lamp body

The lamp body of a table lamp is usually composed of multiple parts, such as lamp holder, lamp pole, lampshade, etc. Screws play a key role in tightly connecting these parts together. Taking the common vertical table lamp as an example, the lamp holder, as the supporting base of the table lamp, needs to be firmly connected to the lamp pole. The bottom of the lamp pole is tightened and fixed with the pre-set screw holes on the lamp holder by screws, so that the lamp pole can stand vertically on the lamp holder and bear the weight of components such as the lampshade and bulb. In this process, the choice of screws is crucial. Generally, screws of appropriate specifications are selected according to the material, weight and required strength of the lamp pole and lamp holder. For metal lamp holders and lamp poles, high-strength stainless steel screws are usually selected due to their hard texture. Such screws not only have good wear resistance and corrosion resistance, and can adapt to different use environments, but also their high strength can ensure that the connection parts will not loosen due to gravity during long-term use.​
(II) Connection between lampshade and lamp body

For table lamps, lampshades not only protect the bulb and gather light, but also greatly affect the appearance of table lamps. Screws are also the key to achieve stable connection between lampshades and lamp bodies. Different types of lampshades have different connection methods with lamp bodies, but screw connection is a common and reliable method. For example, for some lampshades made of glass or plastic, mounting holes are often set on the edge of the lampshade and connected to the corresponding mounting seat on the lamp body with screws. This connection method can ensure that the lampshade will not shake easily after installation and ensure that the light can be evenly scattered in the expected direction. In some retro-style table lamp designs, the lampshade may be in the form of a metal frame wrapped in glass. At this time, the screws must not only achieve the connection between the lampshade and the lamp body, but also take into account the coordination with the overall style. Some screws with special surface treatments, such as chrome plating and antique copper treatment, can not only meet the strength requirements of structural connection, but also complement the retro style of the table lamp and enhance the overall aesthetics of the table lamp.​
II. The unique function of the knob in adjusting and fixing the structure of the desk lamp

(I) Implementation of lamp head angle adjustment

Many desk lamps have the function of adjusting the lamp head angle to meet the user's needs for light direction in different scenarios. The knob plays a key role in the implementation of this function. By rotating the knob, a series of internal mechanical structures are driven to realize the up and down, left and right rotation of the lamp head. In the common articulated lamp head desk lamp, the knob is connected to the internal screw, gear and other mechanical parts. When the user rotates the knob, the screw will rotate accordingly, and then push or pull the parts connected to the lamp head to achieve precise adjustment of the lamp head angle. In this process, the design of the knob needs to fully consider the user's operating feel and the accuracy of adjustment. Generally speaking, the diameter of the knob will be designed within a suitable range so that the user can easily grasp and apply force. Some anti-slip textures, such as concave and convex patterns, knurling, etc., will be designed on the surface of the knob to increase the friction between the finger and the knob, prevent slipping during the adjustment process, and ensure that the user can accurately adjust the lamp head to the desired angle.​
(II) Fixing the angle after adjustment​
The knob is not only used to adjust the angle of the lamp head, but more importantly, it can fix the lamp head at the desired angle after the adjustment is completed, ensuring that the lamp head will not be displaced due to external force or its own gravity during use. The realization of this fixing function depends on the cooperation between the knob and the internal mechanical structure. When the knob is rotated to a certain position, the internal locking mechanism will be triggered. For example, some designs with spring clips, the rotation of the knob drives the screw to move. When the preset angle is reached, the spring clip will be snapped into the corresponding slot to fix the lamp head. This fixing method requires ensuring that the locking mechanism has sufficient strength and stability to prevent the lamp head from loosening due to frequent adjustments or external force collisions in daily use. In some high-end desk lamp products, a more sophisticated ratchet structure is also used. Through the cooperation of the ratchet and the pawl, the multi-level locking of the lamp head angle is achieved. Users can fix the lamp head at different preset angles according to their needs, greatly improving the flexibility and stability of the desk lamp.​
III. The influence of screw knob injection molding accessories on the stability of desk lamps​
(I) Guarantee of overall structural stability​
The quality and installation accuracy of Desk Lamp Screw Knob Injection Molding Accessories are directly related to the stability of the overall structure of the desk lamp. During the production process, if the specifications of the screws do not meet the requirements, such as the diameter is too small or the length is too short, it may not provide sufficient fastening force, resulting in loose connections between the various parts of the lamp body, and it is easy to shake or even fall apart during use. Similarly, the matching accuracy of the knob and the internal mechanical structure is also crucial. If there are problems such as jamming and excessive gaps during the rotation of the knob, it will not only affect the user's experience of adjusting the angle of the lamp head, but may also cause the lamp head to loosen when it is fixed in the fixed position, affecting the normal use of the desk lamp. Therefore, in the design and production process of the desk lamp, it is necessary to strictly control the quality of the screw knob injection molding accessories. From the selection of raw materials to the control of the production process, and then to the final assembly and debugging, every link must ensure that the accessories can meet the requirements of the overall structural stability of the desk lamp.​
(II) Stability in response to different usage environments
Desk lamps face various challenges in different usage environments, and the performance of screw knob injection molding accessories also needs to be able to adapt to these environmental changes to ensure the stability of the desk lamp. For example, for desk lamps used in humid environments, the screws need to have good rust resistance, otherwise the screws will rust and corrode after long-term use, causing the connection parts to loosen. It is particularly important to use stainless steel or screws that have undergone special rust-proof treatment. For desk lamps that often need to be moved or used in vibrating environments, the connection between the knob and the internal mechanical structure needs to be more stable to prevent the angle of the lamp head from changing due to vibration. Some designs that use special damping materials or reinforced connection structures can effectively improve the stability of desk lamps in vibrating environments and ensure that desk lamps can work normally in various complex usage environments.