Springs are a crucial component in door handles, responsible for returning the handle to its normal position after each use. If a door handle doesn't revert back to position, it could be due to an issue with the spring. When you are dealing with the design or choice of a spring for a door handle, you need to evaluate several aspects: requirements, material composition, spring end design, spring force and dimensions. This article will delineate these considerations thoroughly. Additionally, it will offer you useful advice and examples drawn from real scenarios to help you comprehend these factors. You can apply this understanding to uplift the standard and safety of your designs, particularly in the context of door handles.

Requirements for Door Handle Springs

Material Selection

Choosing the appropriate material is an important part in spring design for door handles. Stainless steel and phosphor bronze are common selections because of their advantageous properties. The use of stainless steel is widespread due to its high corrosion resistance, in addition to having substantial tensile strength, ductility, and toughness.

Moreover, material selection must comply with the specific requirements of the application. For instance, in electronic access systems where a certain level of electrical conductivity is necessary, phosphor bronze, although more costly, is preferred over stainless steel. Phosphor bronze presents a efficient balance among conductivity, corrosion resistance, and strength, which enhances the spring's performance in these specific systems.

Summarily, the selection of spring material in a door handle design must take into account various aspects such as the mechanical properties of the material, its cost, and the conditions where the handle will be placed. A thorough analysis encompassing these aspects will result in a spring of better durability.

Suggested End Type

The suitable end type for springs in door handles is the closed and ground type. This end type has turns that are in contact, and the ends are level, which increases stability. This trait is useful as it ensures the door handle returns back to its initial position uniformly after it has been used.

When designing door handles for areas like public facilities, which see regular and frequent use, it is crucial to consider the type of spring. The constant use could put more pressure on the spring mechanism. The closed and ground spring design secures the handle's operational integrity over time, ensuring consistent performance and safe operation.

The choice of end type is reliant on specific design requirements or operating conditions. A closed and ground spring type gives stability but can often have a higher cost or require a somewhat complicated installation process. It might be unnecessarily sophisticated for doors that undergo less frequent use or don't experience heavy loads. Thus, application context needs to be considered during the selection of a suitable spring end type for door handle design.

Spring Constant and Size

The spring constant is a numerical value that quantifies the rigidity of the spring. In the context of door handle design, it is a significant factor. A spring characterized by higher spring constant values demands more force for deformation, which subsequently leads to a faster repositioning of the door handle to its initial state. For door handles projected to experience high usage rates or likely to be operated by individuals with hand strength limitations such as children or the elderly, a spring with a lower spring constant is recommended to encourage user-friendliness.

The physical dimensions of the spring, specifically the coil diameter, are also a determinant of its performance. A spring with larger coil diameter will have a lowered spring constant, which translates to less rigidity and, consequently, a door handle that requires less force to engage. On the other hand, a spring with a smaller coil diameter hosts an increased spring constant that leads to higher rigidity, thus necessitating more force to activate the door handle. However, a potential drawback of incorporating springs with higher rigidity is that certain user demographics might find the door handle usage challenging. Therefore, care should be taken to understand the needs and abilities of the intended users when selecting the spring size.


The design and selection process for door handle springs plays a key role in the overall mechanism. It is crucial to adhere to the specific requirements of the door handle's function when choosing a spring. Selecting the most fitting material is an incremental step as its lifespan and compatibility have direct effects on how the spring performs.

Factors like the spring's end type, which needs to fit with the handle's design, its spring constant, and size, all determine how the spring functions when force is applied. The role of the spring may not be always evident, yet its untroubled operation is a sign of correct selection and installation.

By investing time and thought into the spring's design, door handle operation can be ensured to be smooth and reliable. This highlights the fact that springs, although often underappreciated, are a foundational element in constructing door handles.