Domestic Appliance Door Handle Clamp for Thin-Walled Grip Stability
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Solution Overview
Problem
Existing door handles for household appliances tend to deform and lose their firm fit due to minimal material deformation, leading to wobbling and unsightly light reflections, especially when made of thin-walled materials like aluminum or plastic.
Innovation Solution
A door handle design featuring an elastically deformable clamping part with a spherically shaped outer surface and multiple elastic tongues, which engages in a non-slotted portion of the handle, preventing deformation and ensuring a secure fit even with thin-walled materials, and a screw connection that aligns the clamping part with the handle holder for a durable clamp fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the handle is made of thin-walled material or resilient material, then the ease of manufacture and weight are improved, but the handle deforms when heads are pressed in, leading to loss of firm fit and aesthetic distortion
Solution Approach 1:
The handle is divided into two functional sections: a slotted section that allows the arm to extend through, and a non-slotted section that provides a rigid engagement area for the clamping part. This segmentation allows the handle to be made of thin-walled material while preventing deformation at the critical engagement point.
Solution Approach 2:
The clamping part is designed to engage specifically with the non-slotted section of the handle, creating a localized rigid connection point. This local quality ensures that the thin-walled handle does not deform under clamping forces, as the rigidity is concentrated where needed rather than requiring the entire handle to be thick-walled.
2Stability of the object's composition
If the heads of handle holders are made with oversize to prevent wobble, then the stability is improved, but the handle must be made with high wall thickness, increasing weight and reducing ease of manufacture
Solution Approach 1:
The clamping part employs elastic deformation as a key parameter change mechanism. The elastically deformable material allows the clamping part to flex during assembly and then maintain a stable, wobble-free connection without requiring oversized heads or thick-walled handles. The elastic properties enable a compact design that achieves stability through material behavior rather than geometric oversizing.
3Ease of operation
If the clamping part is made elastically deformable to engage with oversize, then the ease of assembly is improved, but the device complexity increases
Solution Approach 1:
The clamping part integrates multiple functions into a single component: it provides the clamping force, enables elastic engagement, and secures the handle to the handle holder. This merging of functions into one elastically deformable part simplifies the overall assembly process while achieving the desired complexity through material properties rather than multiple separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a durable and deformation-free grip that maintains a firm fit without the need for oversized handle holders, ensuring the handle remains securely attached and aesthetically pleasing, even with thin-walled materials, and allows for easy assembly and reduced component count.
Implementation Method 1
the head carries an elastically deformable clamping part which engages with oversize in a non-slotted portion of the handle
Implementation Method 2
the clamping part comprises a plurality of elastic tongues separated from one another by slots. When the handle is pushed onto the handle holder, the elastic tongues can be elastically bent in order to then hold the handle with a friction fit
Implementation Method 3
hold the handle with a friction fit
Implementation Method 4
the tip of the clamping part can easily be inserted into the handle with a certain amount of play, and a frictional connection between the clamping part and the handle only arises when the clamping part has already penetrated a little into the handle
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a door handle (2) for a domestic appliance comprising an elongated grip part (3) that is provided with a slot (31) in at least one end and comprising at least one grip support (4) for connecting the grip part (3) to a door (1). A head (41) of the grip support (4) engages with the grip part (3) through the slot (31). The head (41) is provided with an elastically deformable clamping part (5), which is larger than and engages with a non-slotted section (33) of the grip part (3).