Lock Actuator Collision Prevention in Image Forming Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses face the risk of damage due to unintended collisions between lock actuators and stoppers when the front cover is closed, caused by erroneous solenoid activation or vibrations, which can lead to damage during jam disposal operations.
Innovation Solution
Incorporating a movable portion with a block portion that restricts the lock portion's movement from the release position to the lock position when the openable member is opened, and allows it to move when closed, preventing collisions and ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the lock mechanism is configured with a solenoid to actuate the lock actuator between engage and release positions, then the lock mechanism can automatically lock and unlock the front cover, but the lock actuator may move from the release position to the engage position after the front cover is opened due to erroneous solenoid activation or vibration, causing collision damage
Solution Approach 1:
The movable portion is positioned to block the lock actuator's movement to the engage position in advance when the front cover is opened. This preliminary blocking action prevents the harmful collision before it can occur, even if the solenoid erroneously activates or vibration occurs during the open state
Solution Approach 2:
The movable portion acts as an intermediary element between the lock actuator and the stopper. When the front cover is opened, this intermediary blocks the lock actuator's path to the stopper, preventing direct collision while allowing the solenoid to still attempt actuation without causing damage
2Speed
If the lock actuator is allowed to move freely between positions, then the lock mechanism can respond quickly to solenoid activation, but the lock actuator may collide with the stopper when the front cover is closed in an unintended state
Solution Approach 1:
The blocking function of the movable portion is dynamic rather than static. It automatically adjusts its blocking state based on the front cover's position: blocking when opened (preventing harmful movement) and non-blocking when closed (allowing normal lock operation). This dynamic behavior maintains both speed and reliability
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
Prevents damage to the apparatus by ensuring the lock portion remains in a safe position during opening and closing operations, even under abnormal conditions such as solenoid surges or vibrations, thereby safeguarding the device and allowing for safe jam disposal.
Implementation Method 1
a mechanism including a solenoid
Data Source
AI summary
The present disclosure provides an image forming apparatus capable of preventing members from colliding from each other upon an openable member being closed. An openable member opened and closed with respect to the apparatus body is locked in a closed state by a lock portion located at a lock position, and permitted to open upon the lock portion being moved to a release position. The apparatus body is provided with a movable portion that is moved to a first position if the openable member is opened and to a second position if the openable member is closed. The movable portion includes a block portion that is configured to block a movement of the lock portion from the release position to the lock position if the movable portion is located at the first position.