Basic structure and working mechanism of trigger sprayer
The trigger sprayer is mainly composed of nozzle, pump body, spring, sealing ring, liquid inlet pipe and shell. When the trigger is pressed, the internal pump body generates pressure through the piston, so that the liquid is atomized and sprayed out through the nozzle. After releasing the trigger, the spring resets and re-absorbs the liquid into the pump chamber to prepare for the next spray. This repetitive reciprocating action makes the trigger sprayer have a certain mechanical load during use, and also puts forward stability requirements for sealing and elastic materials.

Physical wear phenomenon under long-term use
The trigger sprayer will experience repeated mechanical movement during use, especially the compression and release of the spring, the sliding of the piston, and the contact between the seal and the liquid. Under high-frequency use conditions, spring fatigue, piston aging, and seal wear become more common physical loss phenomena. These wears may cause the pump body to move unsmoothly, which in turn causes problems such as discontinuous spraying or trigger jamming.

Trend of sealing performance over time
Seals are usually made of rubber or silicone, which have strong elasticity and fit in the early stage, but after long-term use or frequent contact with liquids, they are prone to aging, hardening, deformation and other phenomena. These changes cause gaps in the originally tight sealing structure, resulting in leakage or liquid backflow. In addition, some liquids with strong chemical components (such as detergents or solvents) are corrosive to the sealing material, which will also accelerate the decline of sealing performance.

Analysis of possible causes of jamming
Jamming is usually manifested as laborious, unsmooth or incomplete reset when the trigger is pressed. This phenomenon may come from several aspects: first, the scale or sediment inside the pump body hinders the free sliding of the piston; second, the spring fatigue reduces the reset ability; third, insufficient lubrication leads to increased mechanical friction. In addition, if the sprayer is exposed to an environment with a large temperature difference, the thermal expansion and contraction of some components will also affect the matching accuracy, resulting in jamming problems.

Various manifestations of leakage problems
Sprayer leakage can usually be divided into nozzle dripping, pump body leakage and bottle mouth seam leakage. Nozzle dripping may be related to residual liquid inside the spray head, or it may be caused by poor sealing. Pump body leakage is often related to the loose fit between the pump body and the piston, while leakage at the bottle mouth is mostly caused by loose threaded connection or aging of the sealing gasket. Leakage not only affects normal use, but may also cause liquid waste or bring pollution risks to the use environment.

Impact of liquid type on service life
Different liquids have different adaptability to the materials of trigger sprayers. For example, alcohol or acidic and alkaline liquids may cause certain corrosion to internal plastics and seals, while milder aqueous liquids have less impact on the structure. Long-term use of corrosive liquids can easily accelerate the aging of components, thereby shortening the service life of the sprayer, and is more likely to cause problems such as jamming or leakage.

Indirect impact of user usage habits
If users frequently use excessive force during use, fail to operate in the correct way, or store for a long time without cleaning the residual liquid, it may cause a burden on the structure of the sprayer. For example, excessive squeezing may cause the spring to deform or the piston to lose its position, and the accumulation of residual liquid may cause the nozzle to be blocked, thereby increasing the probability of jamming and leakage. In addition, if a large amount of liquid remains in the bottle but it is still pressed forcefully, the fatigue load of the pump body may also increase.

The impact of cleaning and maintenance on the state of the sprayer
Proper cleaning and regular maintenance can effectively slow down the functional degradation of the sprayer. For example, regularly cleaning the nozzle and the liquid inlet pipe with warm water can reduce sediment and avoid blockage, and also help to prolong the elasticity of the seal. In the case of long-term non-use, it is recommended to disassemble and clean the sprayer and keep it dry to reduce the erosion of the material by liquid residue.

The supporting role of product design on durability
Some trigger sprayers use reinforced plastics, high-elasticity stainless steel springs and multi-layer sealing ring structures in their designs. These designs can extend the service life, reduce the jam rate and the probability of leakage to a certain extent. In addition, some products will add a self-lubricating coating or an independent anti-drip structure inside the pump body. Although these improvements increase the manufacturing cost, they can effectively improve the ability of continuous and stable use.