Resin Minicar Body Metal Reinforcement for Door Stability
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Solution Overview
Problem
The manufacturing of ornamental minicars using resin molds often results in deformation of the bottom area, making it difficult to securely attach a metal reinforcing member, which affects the opening/closing stability of the doors.
Innovation Solution
A metal reinforcing member is fixed internally to the resin body with a frame portion that securely fixes the bottom portion under the doors, preventing deformation and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin body is molded using a metal mold, then fine parts can be easily processed and manufacturing cost can be reduced, but the bottom area shape is deformed outward when removing from the mold
Solution Approach 1:
The patent applies preliminary action by providing a reinforcing member in advance within the resin body at the bottom area. This reinforcing member is positioned before the molding process to prevent the outward deformation of the bottom area that occurs during mold removal. The reinforcing member acts as a pre-installed structural support that maintains shape accuracy while still allowing the benefits of resin molding for fine parts processing.
2Strength
If a metal reinforcing member is fixed to the resin body, then the body can be prevented from flexing and massive feeling can be exhibited, but the deformed bottom area makes it difficult to securely attach the reinforcing member
Solution Approach 1:
The reinforcing member is preliminarily positioned within the resin body at the bottom area before the resin cures. This preliminary positioning ensures that the reinforcing member will be securely attached at the correct location even if the bottom area deforms during mold removal. The reinforcing member acts as a pre-placed structural element that maintains both attachment accuracy and flexure resistance.
Solution Approach 2:
The reinforcing member is nested within the resin body, with the resin material surrounding and securing the reinforcing member. This nesting arrangement allows the reinforcing member to be embedded in the bottom area, providing internal structural support against flexing while the deformed bottom area shape does not affect the secure attachment since the reinforcing member is already positioned within the curing resin.
3Ease of manufacture
If the bottom area is deformed outward during molding, then the reinforcing member cannot abut reliably on the side sill, but the door opening/closing stability is affected
Solution Approach 1:
The reinforcing member is preliminarily positioned within the resin body at the bottom area before molding completion. This preliminary positioning ensures that when the bottom area deforms outward during mold removal, the reinforcing member remains securely attached and can still reliably abut on the side sill. The preliminary placement of the reinforcing member compensates for the subsequent deformation, maintaining door opening/closing stability.
Data Source
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AI summary
[Problems to be Solved] The present invention has been made to solve such a problem and has an object to enable a more enhancement in opening/closing stability of left and right doors in reliable abutment of a bottom area provided under the doors of a body formed by a resin on a reinforcing member formed of a metal in an ornamental minicar configured to fix the reinforcing member formed of a metal to the body having the doors configured openably. [Means for Solution] A reinforcing member 20 formed of a metal is fixed to a body 10 formed by a resin to which left and right doors 12 are to be attached openably, and a bottom portion 16 positioned under the doors 12 is fixed to a frame portion 29 of the reinforcing member 20. Consequently, the body 10 is molded by a resin to easily enable processing of a fine part, and at the same time, the body 10 (particularly, a side sill member 13 portion positioned directly under the door 12) is caused to be flexed with difficulty by the reinforcing member 20 formed of a metal. Thus, it is possible to enable opening/closing stability of the door 12 to be exhibited and to enable a massive feeling to be exhibited when a user performs holding in a hand.