Keyboard Leg Attachment Plate Structure for Easy Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing leg attachment structures for keyboard instruments are complex and costly due to the use of engagement pins and leg fixing metal fittings, making assembly troublesome and increasing manufacturing costs, while being limited to round legs only.
Innovation Solution
A leg attachment structure featuring metal plates installed on the upper surfaces of leg main bodies, with rod-shaped portions that are threaded and inserted into hole portions, allowing for secure fixation and flexibility in design, including the use of wood for leg main bodies and metal for plates, and groove portions on the key bed and side arms for additional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If engagement pins and leg fixing metal fittings are used to fix legs, then desired leg surfaces can face the front surface side, but the fixing structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The leg is divided into two functional parts: a round leg body for rotational adjustment and a flat plate for final positioning and fixation. This segmentation allows the leg to achieve both alignment capability and simple fixation, resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
A metal plate is introduced as an intermediary component between the leg body and the instrument body. The plate serves as a mediator that provides both alignment functionality through its shape and simple fixation through its structure, eliminating the need for complex engagement pins and metal fittings.
2Manufacturing precision
If engagement pins and leg fixing metal fittings are used to fix legs, then desired leg surfaces can face the front surface side, but assembling becomes troublesome
Solution Approach 1:
The leg assembly is segmented into a round leg body that can be freely rotated during assembly and a flat plate that is simply fixed to the instrument body. This segmentation allows workers to easily align the leg surface by rotation before fixation, making assembly straightforward while maintaining alignment precision.
Solution Approach 2:
The leg body is pre-designed with a round shape that enables free rotation, allowing workers to preliminarily align the desired surface facing the front before the final fixation step. This preliminary alignment action simplifies the overall assembly process while ensuring precise positioning.
3Strength
If conventional leg attachment structure is used, then strength can be ensured, but the structure is limited to round legs only
Solution Approach 1:
The round leg body design is made universal by allowing it to accommodate different leg shapes and sizes. The flat plate with its standardized fixation method can work with various leg configurations, making the attachment structure versatile while maintaining strength through the robust plate-to-body connection.
Solution Approach 2:
The invention changes the critical parameter from leg shape constraints to plate configuration. By keeping the leg body round for rotational freedom and using a flat plate for fixation, the system can adapt to different leg designs (different shapes, sizes, materials) while maintaining attachment strength through the plate's connection to the instrument body.
Data Source
AI summary
A leg attachment structure for a keyboard instrument including leg main bodies that support a keyboard portion from both sides, the keyboard portion in which plural keys are arranged on a key bed, wherein the leg attachment structure has plates installed on upper surfaces of the leg main bodies, the plates and the leg main bodies are fixed by inserting rod-shaped portions formed on lower surfaces of the plates into hole portions provided in the leg main bodies, and the plates are formed to be larger than an area of the upper surfaces of the leg main bodies, and installed at positions eccentric to the inner side and the rear side of the keyboard portion with respect to the upper surfaces of the leg main bodies.