Vehicle Door Lock Terminal Alignment During Coupling Cutoff
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Solution Overview
Problem
Existing vehicle door lock devices face challenges in maintaining positional accuracy of terminals with respect to the housing, leading to incomplete connections and potential operational issues due to positional deviations during the cutting of coupling portions.
Innovation Solution
The vehicle door lock device incorporates positioning protruding portions and fitting grooves to securely align and connect conductive terminals, with connector pins and switch pins bent at right angles to ensure accurate assembly and prevent positional deviations, utilizing an assembling device to cut off coupling portions and form electric circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupling portions are cut to form electric circuits, then electrical components are electrically connected, but positional deviation of terminals occurs leading to incomplete connections
Solution Approach 1:
The patent applies preliminary action by pre-forming positioning protrusions on the terminal and positioning recesses on the housing before the cutting operation. These positioning features are created in advance to guide and constrain the terminal position during subsequent assembly and cutting operations, preventing positional deviation before it occurs.
Solution Approach 2:
The patent introduces positioning protrusions and positioning recesses as intermediary elements that mediate between the terminal and housing. These intermediary features serve as mechanical guides that maintain precise alignment during the cutting process, ensuring that the terminal remains properly positioned relative to the housing when coupling portions are severed.
2Device complexity
If connector pins are directly formed with terminals, then assembly is simplified, but positional accuracy cannot be maintained during cutting operations
Solution Approach 1:
The patent applies preliminary action by pre-forming positioning protrusions on the terminal and positioning recesses on the housing before the cutting operation. These positioning features are created in advance to guide and constrain the terminal position during subsequent assembly and cutting operations, preventing positional deviation before it occurs.
Solution Approach 2:
The patent introduces positioning protrusions and positioning recesses as intermediary elements that mediate between the terminal and housing. These intermediary features serve as mechanical guides that maintain precise alignment during the cutting process, ensuring that the terminal remains properly positioned relative to the housing when coupling portions are severed.
Data Source
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AI summary
In a vehicle door lock device, a positional deviation of a terminal at the time of cutting off coupling portions of a switch terminal is securely prevented, and assembling position accuracy of the switch terminal with respect to a housing is improved. The housing 5 includes positioning protruding portions 51a protruding at a right angle with respect to installation portions 51g on which conductive portions 18a of the switch terminal 18 are installed, and connector fitting grooves 51b opened in a direction parallel to the positioning protruding portions 51a. The switch terminal 18 includes a plurality of conductive portions 18a, positioning holes 18g into which the positioning protruding portions 51a are inserted, connector pins 18b that are formed at one ends of the conductive portions 18a so as to be bent at a right angle and are fitted into the connector fitting grooves 51b, and switch pins 18c, 18d that are formed at the other ends of the conductive portions 18a at a right angle, are inserted into internal pins 16a, 17a of switches 16, 17, and are electrically connected to the switches 16, 17.