Vehicle Seat Tip Up Lock Cancel Mechanism Inner Frame Fixing

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Solution Overview

Problem

Existing vehicle seat designs with tip up lock cancel mechanisms require an increased lateral dimension due to the placement of fixing parts on the outer side of the back frame, which is inefficient in space utilization and increases the seat's width.

Innovation Solution

The vehicle seat design incorporates a tip up lock cancel mechanism with a cable encasing member fixed to the inner side of the back side frame, minimizing the gap between the back side frame and the cushion frame, and using a reinforcement member with an integrally formed fixing part that also serves as a stopper, reducing the need for extra components and assembly work.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the fixing part for the cable encasing member is provided on the outer side of the back frame, then the tip up lock cancel mechanism can be effectively operated, but a gap is required between the back frame and cushion frame which increases the lateral dimension of the seat

Engineering Contradiction:

Improvetip up lock cancel mechanism operationVSAvoidlateral dimension of seat

Core Design Contradiction:

Ease of operationVSLength of stationary object

Solution Approach 1:

The fixing part is inverted from the conventional outer side placement to the inner side placement on the back frame. This inversion allows the cable encasing member to be anchored internally, eliminating the need for external gaps and reducing the lateral dimension of the seat while maintaining mechanism functionality.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The fixing part is positioned in the longitudinal dimension (inner side of back frame) rather than requiring lateral space (outer side). This dimensional repositioning transfers the anchoring function from a lateral arrangement to a longitudinal arrangement, reducing seat width while preserving operational capability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If the fixing part is provided on the outer side of the back frame, then the cable encasing member can be securely fixed, but the lateral dimension of the seat must be increased to accommodate the fixing part and gap

Engineering Contradiction:

Improvecable encasing member fixationVSAvoidlateral dimension of seat

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The fixing part is inverted from outer side to inner side placement on the back frame. This internal anchoring position provides secure fixation of the cable encasing member through the back frame structure itself, eliminating the need for lateral extension while maintaining reliable attachment.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The fixing part is nested within the back frame structure on its inner side, utilizing the existing frame geometry for anchoring. This nested arrangement integrates the fixation function within the back frame's internal space rather than requiring external lateral accommodation.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If separate fixing parts and stoppers are provided, then the tip up lock cancel mechanism functions reliably, but the number of components and assembly work increase

Engineering Contradiction:

Improvetip up lock cancel mechanism functionVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The fixing part and stopper function are merged into a single integrated component. The fixing part on the inner side of the back frame simultaneously performs both the anchoring of the cable encasing member and the stopping function, eliminating the need for separate components and reducing assembly complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixing part is designed with multi-functionality, serving both as an anchoring point for the cable encasing member and as a stopper for the mechanism. This universal component performs multiple functions that would traditionally require separate parts, reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9987954B2Vehicle seat

Publication Date: 2018.06.05 TS TECH CO LTD

AI summary

An increase in the lateral dimension of a vehicle seat equipped with a tip up lock cancel mechanism is prevented. In a vehicle seat equipped with a tip up mechanism for retaining the seat cushion at least in a tip up position and a tip up lock cancel mechanism for releasing the seat cushion from a retained condition effected by the tip up mechanism in response to a forward tilting movement of the seat back, the tip up lock cancel mechanism includes a cable encasing member having one end fixed to the seat cushion and another end fixed to a back side frame via a fixing part, and a cable slidably received in the cable encasing member and having one end connected to the tip up mechanism and another end connected to a seat base, the fixing part for fixing the cable encasing member to the back side frame being located on an inner side of the back side frame.