Compact Lever-Handle Driving Device for Door and Window Mounting
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Solution Overview
Problem
Existing door and window drive structures require large mounting spaces and complex assembly processes due to the size and complexity of transmission mechanisms, which include polygonal shafts and gears, leading to increased processing time and difficulty in mounting and controlling internal components.
Innovation Solution
A driving device with a transmission mechanism that includes a mounting housing, a movable member, and a lever handle, featuring a sliding groove and engagement strips, reduces space occupation and simplifies mounting by eliminating the need for additional gears, allowing for compact assembly and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional transmission mechanism with polygonal shaft and gears is used, then the transmission function is reliable, but the occupied space is large and mounting complexity increases
Solution Approach 1:
The patent combines the polygonal shaft and gear structures into an integrated transmission mechanism where the connection shaft directly engages with the movable member through meshing teeth. This merging eliminates separate gear components and reduces the number of fittings while maintaining reliable transmission function.
Solution Approach 2:
The connection shaft serves multiple functions: it acts as both the input shaft for receiving rotation force from the lever handle and as the gear element that directly drives the movable member. This multi-functionality reduces the overall device complexity and mounting requirements.
2Force
If a large-sized transmission mechanism is used to satisfy force requirements, then the transmission capability is sufficient, but the mounting space requirement increases
Solution Approach 1:
The patent employs a polygonal shaft with curved meshing teeth that engage with corresponding teeth on the movable member. This curved engagement design allows for more efficient force transmission in a compact space, eliminating the need for large-sized traditional gear mechanisms.
Solution Approach 2:
The transmission mechanism is designed to mount on the surface of the section bar member rather than requiring internal cavity space. The connection shaft and movable member engage in a radial direction perpendicular to the bar surface, utilizing surface mounting to reduce spatial requirements.
3Reliability
If multiple separate fittings (gear, rack, lever handle) are used, then the transmission function is complete, but the mounting process becomes complicated and time-consuming
Solution Approach 1:
The patent merges the lever handle, connection shaft, and movable member into an integrated assembly where the connection shaft is directly formed with meshing teeth. This eliminates the need for separate gear fittings and reduces the number of assembly steps while maintaining complete transmission functionality.
Solution Approach 2:
The transmission mechanism is segmented into modular components (lever handle, connection shaft, movable member) that can be independently manufactured and then quickly assembled. The standardized meshing interfaces enable rapid assembly without complex alignment procedures.
4Ease of manufacture
If the transmission mechanism is mounted on the section bar member cavity, then the mounting is possible, but the cavity is damaged and processing time increases
Solution Approach 1:
The patent transitions from internal cavity mounting to external surface mounting. The connection shaft is mounted on the outer surface of the section bar member, eliminating the need to access and process the internal cavity. This preserves cavity integrity while maintaining mounting feasibility.
Solution Approach 2:
The mounting operation is extracted from the internal cavity environment and relocated to the external surface. The connection shaft engages with the bar member through surface-mounted features rather than requiring internal cavity modifications, thus preserving the cavity structure.
Data Source
AI summary
A driving device including a transmission mechanism, a lever handle, and a locking mechanism. The transmission mechanism includes a mounting housing and a movable member. The mounting housing is formed with a sliding groove, and the stopper edges are respectively disposed on the tops of two sidewalls of the sliding groove. The movable member is configured to pass through the sliding groove. The bottom wall of the movable member is provided with a transmission rack. The lever handle includes a handle, a mount, a connection shaft, and a second fastener. An end of the handle is formed with a second mounting groove that is provided with an internal tooth portion. The mount is disposed in the second mounting groove and can be connected to a section bar member. The connection shaft is rotatably disposed in the mount and includes a first external tooth portion and a second external tooth portion. The first external tooth portion meshes with the internal tooth portion, and the second external tooth portion meshes with the transmission rack. An end of the second fastener is connected to the bottom wall of the second mounting groove. The locking mechanism is configured to pass through the mounting housing and a mounting wall and is connected to the mount.