Screwless Strike Device Locks Elastic Anchoring
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Solution Overview
Problem
Existing strike devices for locks require screws for fixation, which can be aesthetically unpleasing and pose safety risks, and do not effectively compensate for machining gaps or tolerances in the housing seat.
Innovation Solution
A screwless strike device featuring a box body with elastically yieldable locking arms and a face plate with divaricating members that press-fit into the box body, allowing for firm anchoring without screws and accommodating misalignments and tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used for fixing the strike device to the door frame, then the fixation is secure and reliable, but the aesthetic appearance deteriorates and safety risks increase
Solution Approach 1:
The patent removes the screws from the strike device structure entirely. Instead of having screws protrude from the device, the invention uses a cup body that receives the door frame directly, extracting the harmful visual and safety elements while maintaining secure fixation through the cup's anchoring mechanism.
Solution Approach 2:
The door frame is nested within the cup body structure. The cup body acts as a receiving element that accommodates the door frame, creating a nested arrangement where the frame is housed within the cup, eliminating the need for external screws and improving both appearance and safety.
2Reliability
If screws are used to fix the strike device, then the fixation is firm, but the device complexity increases and manufacturing costs rise
Solution Approach 1:
The patent merges the fixing function into the cup body structure itself. The cup body integrates both the receiving function for the door frame and the fixing function through its anchoring elements, eliminating the need for separate screw components and simplifying the overall device structure.
Solution Approach 2:
The cup body serves multiple functions simultaneously: it receives the door frame, provides structural support, and executes the fixing operation through its integrated anchoring mechanism. This multi-functionality eliminates the need for separate fixing components, reducing device complexity.
3Manufacturing precision
If the housing seat is precisely processed to accommodate the strike device, then the alignment is accurate, but the manufacturing difficulty and cost increase
Solution Approach 1:
The patent changes the geometric parameters of the cup body to include compensating features. The cup body is designed with dimensions and shapes that can accommodate variations in the housing seat processing, allowing for tolerance compensation without requiring extremely precise machining of the seat.
Solution Approach 2:
The cup body design incorporates built-in compensation features that cushion against machining gaps and tolerances in the housing seat. By designing the cup with flexible or adjustable geometric parameters, the system anticipates and compensates for potential misalignments before installation occurs.
4Ease of manufacture
If the strike device is designed with fixed dimensions, then the manufacturing is simple, but the adaptability to misalignments and tolerances is reduced
Solution Approach 1:
The patent introduces dynamic or adjustable elements to the cup body design. The cup body can be configured with flexible dimensions or adjustable features that allow it to adapt to variations in the housing seat and door frame positioning, maintaining manufacturability while improving tolerance compensation capability.
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 visually appealing, cost-effective, and secure fixation of the strike device to a door frame without screws, enabling compensation for machining clearances and tolerances, and facilitating easy alignment with locks.
Implementation Method 1
locking arms, which are elastically yieldable at at least one end, or at at least one side of the box body
Implementation Method 2
press the locking arm against an inner surface of the housing seat of the box body
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A screwless strike device for latch- or bolt-locks. The strike device comprises a box body (10) of elongated shape, having a front cavity (12) configured for engaging the latch or bolt of a lock, and a face plate (11) that conforms to the box body (10); the box body (10) is provided with one or more elastically yieldable locking arms (15, 16), configured for locking the box body (10) in a housing seat of the door frame or other support member (27). The face plate (11) is provided with one or more rear pushing members (22, 23), configured to be press-fitted between the locking arms (15, 16) and respective contrasting surfaces of the box body (10), to open the locking arms and push the locking arms against an inner surface of the housing seat of the box body (10).