Offset Gear Drawer Synchronization for Full Pull-Out Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing synchronization devices for drawers in furniture lack stability and space efficiency, as the axes of rotation of spur gears are aligned with the synchronization rod, limiting their applicability and causing disengagement of track gears during drawer pull-out.
Innovation Solution
The synchronization device features a design where the axes of rotation of the spur gears are offset from the synchronization rod's longitudinal axis, allowing for a compact horizontal arrangement and enabling the synchronization rod to be positioned closer to the drawer rear wall, thus allowing full drawer extension without disengaging the front track gears, and accommodating both ejection and non-ejection systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the axes of rotation of the spur gears are aligned with the synchronization rod, then the structure is simpler, but space is wasted and the drawer cannot be fully pulled out without disengagement
Solution Approach 1:
The patent offsets the axes of rotation of the spur gears from the longitudinal axis of the synchronization rod, creating a three-dimensional spatial arrangement. This dimensional repositioning allows the gears to be arranged in a compact configuration that optimizes space utilization while maintaining functional integrity, enabling the drawer to be fully pulled out without gear disengagement.
2Length of moving object
If the synchronization rod is positioned closer to the drawer rear wall, then the drawer can be fully pulled out, but the space behind the drawer is reduced
Solution Approach 1:
By offsetting the gear axes from the synchronization rod's longitudinal axis and arranging components on a substantially horizontal plane, the patent creates efficient three-dimensional space utilization. This allows the synchronization rod to be positioned closer to the drawer rear wall, maximizing the drawer's pull-out length while the offset gear arrangement ensures sufficient space remains behind the drawer for ejection devices or other components.
3Adaptability or versatility
If the axes of rotation of spur gears are offset from the synchronization rod, then space is saved and ejection device can be accommodated, but the structure becomes more complex
Solution Approach 1:
The offset gear arrangement creates a universal synchronization device that can accommodate both drawers with ejection devices and drawers without ejection devices. The spatial offset of the gear axes from the synchronization rod's longitudinal axis, combined with arrangement on a substantially horizontal plane, provides the versatility needed to integrate with different drawer configurations and ejection system requirements.
4Volume of moving object
If the gear axes are offset from the synchronization rod, then compact design is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent achieves compact design by arranging the spur gear axes offset from the synchronization rod's longitudinal axis and positioning all rotation axes on a substantially horizontal plane. This three-dimensional arrangement reduces the overall device volume while the horizontal plane constraint provides a clear manufacturing reference, helping to manage the precision requirements for axis alignment during assembly.
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
This design enhances the stability and universality of the drawer's running behavior by providing space for an ejection device behind the drawer, ensuring smooth operation and compact design, suitable for various drawer configurations.
Implementation Method 1
two spur gears (11, 21) which engage in two toothed racks (12, 22) of a rail extension guide (105), with a rotational movement of the two spur gears (11, 21) being coupled with a rotational movement of the synchronization rod (1)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a synchronisation device for stabilising the running behaviour of a drawer (101) in a furniture body (103), comprising a synchronising rod (1), wherein the synchronising rod (1) has a longitudinal axis (C), and two tracking gearwheels (11, 21) that engage in two racks (12, 22) of a rail pull-out guide (105), wherein a rotary movement of the two tracking gearwheels (11, 21) is coupled to a rotary movement of the synchronising rod (1), wherein the rotational axes (A, B) of all tracking gearwheels (11, 21) are spaced at a distance (X) from the longitudinal axis (C) of the synchronising rod.