Liquid Dispenser Slider Lock for Trigger Restraint and Assembly

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Solution Overview

Problem

Existing liquid dispensing devices face challenges such as complex repositioning of trigger locks, risk of damage during transport, difficulty in assembly, and user confusion regarding locked and unlocked positions, leading to potential device malfunction and resource wastage.

Innovation Solution

A liquid dispensing device with a slider mechanism that restricts trigger movement using slideable restricting elements, allowing for easy assembly and preventing unintended actuation, featuring a compact design and intuitive operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a trigger lock is provided to prevent unintended actuation during transport, then reliability is improved, but device complexity increases and the lock has a high risk of getting lost

Engineering Contradiction:

Improveprevention of unintended actuationVSAvoidcomplexity of trigger lock repositioning

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The device is divided into separable components: the engine with integrated trigger mechanism and the container. The trigger lock functionality is integrated into the engine rather than being a separate removable component, eliminating the risk of loss while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The trigger lock mechanism is merged with the engine body and trigger assembly. The slider that provides locking functionality is integrated into the engine structure, combining the locking function with the existing trigger mechanism rather than adding a separate removable lock component.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If the device is assembled at the production location and transported as a whole, then manufacturing precision is maintained, but transport costs increase and risk of damage rises

Engineering Contradiction:

Improveassembly precisionVSAvoidrisk of damage during transport

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The dispensing device is segmented into two main parts: the engine (pump mechanism) and the container. These can be assembled at the point of sale rather than at the factory, reducing transport costs and damage risk while maintaining assembly precision through standardized connecting means.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The engine is prepared in advance with the trigger mechanism and connecting means ready for assembly. The container is separately prepared with its neck geometry pre-formed. This preliminary preparation allows for quick and precise assembly at the point of sale without requiring complex final assembly operations.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the nozzle protrudes to confine trigger movement, then reliability is improved, but device complexity increases making assembly difficult

Engineering Contradiction:

Improvetrigger movement controlVSAvoidease of assembly

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The trigger confinement function is merged with the slider mechanism. The slider that moves between locked and unlocked positions also serves to confine the trigger movement through its restricting element, combining two functions into a single component rather than requiring a separate protruding nozzle structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The trigger confinement is achieved dynamically through the slider's position rather than a fixed protruding structure. The restricting element on the slider actively engages with the trigger only when needed (in the locked position), allowing for easier assembly while maintaining reliable trigger movement control.

Inventive Principle:

Principle #15Dynamics

4Ease of operation

If indicia are provided on the nozzle to indicate positions, then ease of operation is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improveuser identification of device statusVSAvoidalignment precision of indicia

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The device uses visual contrast through color or reflectivity differences on the slider and trigger components to indicate their positions. The slider and trigger are made of materials with different optical properties, allowing users to easily distinguish between locked and unlocked positions without requiring precisely aligned indicia markings.

Inventive Principle:

Principle #32Color changes

Data Source

PatentUS12544779B2Device and system for dispensing a liquid from a container, and method for assembling a device for dispensing a liquid

Publication Date: 2026.02.10 DISPENSING TECH

AI summary

A device for dispensing a liquid from a container includes an engine having a nozzle and a pump for transferring liquid from the container to the nozzle, a trigger moveable between a first position and a second position, connected to the pump for actuating the pump when brought from the first to the second position, and connecting mean, for connecting the engine to the container. A slider with at least one restricting element is slideable between a non-restricting position, in which the trigger is moveable between the first and second position, and a restricting position, in which the at least one restricting element restricts the movement of the trigger between the first and the second position.