Seat Reclining Brake Locking Structure for High Fixing Force
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Solution Overview
Problem
Conventional seat reclining brake devices for vehicles suffer from increased size due to external brake units and limited fixing force generated by frictional forces of elastic bodies.
Innovation Solution
A seat reclining brake device with a socket housing and a locking plate that engage with each other, where the engagement is released by rotating a lever, allowing the seatback to rotate, and re-engaged when the lever is stopped, enhancing the fixing force through engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If an external brake unit is used to fix the seatback, then the fixing force is generated through friction, but the device size increases and the fixing force is limited
Solution Approach 1:
The locking plate is inserted into the accommodating space of the socket housing, with the locking plate containing the fixing portion that engages with the socket housing. This nested structure allows the brake mechanism to be compact while maintaining effective fixing force through the engagement of protrusion and insertion recess.
Solution Approach 2:
The invention replaces the conventional friction-based external brake unit with an engagement-based locking mechanism. Instead of relying on friction between an elastic body and the socket housing, the fixing portion with protrusion and insertion recess provides mechanical interlocking, delivering superior fixing force in a more compact design.
2Device complexity
If a conventional external brake unit with friction-based fixing is used, then the structure is simple, but the fixing force is limited and device size increases
Solution Approach 1:
The locking plate is inserted into the accommodating space of the socket housing, creating a compact nested structure. The fixing portion with protrusion and insertion recess engages mechanically to provide strong fixing force without requiring a complex external brake unit.
Solution Approach 2:
The invention substitutes the friction-based mechanical system with a mechanical interlocking system. The engagement between the protrusion and insertion recess provides reliable fixing force while maintaining structural simplicity through the integrated locking plate and socket housing design.
3Volume of stationary object
If an elastic body is used to generate fixing force through friction, then the device is compact, but the fixing force is limited
Solution Approach 1:
The invention replaces the friction-based elastic body system with a mechanical interlocking system. The locking plate with fixing portion engages the socket housing through protrusion and insertion recess, providing significantly enhanced fixing force while maintaining a compact device volume through the nested structure.
Solution Approach 2:
The locking plate is nested within the socket housing's accommodating space, maintaining compact dimensions. The engagement mechanism using protrusion and insertion recess delivers superior fixing force compared to friction-based elastic bodies, resolving the trade-off between size and fixing 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 device improves the fixing force of the seatback to the seat cushion, reducing the volume compared to conventional devices, while allowing for easy adjustment and release of the fixing mechanism.
Implementation Method 1
an elastic body inserted into the accommodating space to apply an elastic force to the locking plate in the direction in which the fixing portion is engaged
Data Source
AI summary
A seat reclining brake device for a vehicle includes a socket housing having an accommodating space, a locking plate inserted into accommodating space and coupled to a rotating shaft, a fixing portion formed at a position facing the locking plate and the socket housing, engaged with each other to block a relative rotation of the locking plate and socket housing or disengaged with each other, an elastic body inserted into accommodating space to apply an elastic force to locking plate in the direction in which the fixing portion is engaged, and a lever that is rotatably fastened to socket housing and includes a fixing release portion extending toward socket housing, having an inclining portion, and when the lever is rotated, moving along an inclining portion of the locking plate in the direction opposite the direction in which the elastic body applies the elastic force to disengage the fixing portion.