Low-Profile Card Socket for Mobile Antenna Efficiency
Solution Overview
Problem
The proximity of SIM cards to antennas in mobile communication devices is compromised by the use of high-frame type card sockets, leading to reduced antenna efficiency due to insufficient distance between metal terminals and antennas.
Innovation Solution
A card socket design incorporating a base, resilient members, a holder, and a driving rod allows for the easy ejection of SIM cards without the need for high-frame type sockets, utilizing 'push-push' and 'rotation' mechanisms to maintain a minimal terminal height and maximize antenna space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a high-frame type card socket is adopted to enable SIM card ejection, then the SIM card can be successfully ejected from the card socket, but the distance between the metal terminals and the antenna becomes too short (only 2 to 3 mm), which affects the efficiency of the antenna
Solution Approach 1:
The card socket is divided into two types: a high-frame type card socket for enabling SIM card ejection and a low-frame type card socket for maintaining antenna efficiency. By segmenting the card socket design, the patent resolves the contradiction between ease of operation (SIM card ejection) and antenna efficiency, allowing each type to be used in appropriate scenarios without compromising the other performance aspect.
2Ease of operation
If a high-frame type card socket is adopted, then the SIM card can be ejected, but the height of the metal terminals increases (about 3 to 4 mm), reducing the space available for the antenna
Solution Approach 1:
The patent segments the card socket into high-frame and low-frame types, where the low-frame type maintains minimal metal terminal height (less than 1 mm) to maximize antenna space, while the high-frame type enables SIM card ejection. This segmentation allows the system to optimize for either antenna space or ease of operation depending on the specific implementation needs.
3Volume of moving object
If the SIM card is disposed under or adjacent to the antenna due to limited space, then space utilization is improved, but the proximity reduces antenna efficiency when metal terminals are present
Solution Approach 1:
The patent applies local quality by positioning the low-frame type card socket (with minimal metal terminals) specifically in the region adjacent to or under the antenna. This localized design allows the SIM card to be disposed in space-constrained areas without significantly impacting antenna efficiency, as the minimal metal terminals in this specific location cause less interference compared to a full high-frame socket in the same position.
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
This design increases the space available for the antenna, enhancing its efficiency by maintaining a distance of less than 1 mm between metal terminals and antennas, thereby improving overall antenna performance.
Implementation Method 1
a first resilient member disposed on the bottom surface... a second resilient member disposed in the accommodating space
Data Source
AI summary
The invention discloses a card socket comprising a base, a first resilient member, a holder, a second resilient member and a driving rod. The base comprises a bottom surface and a side wall with a block portion. The first resilient member is disposed on the bottom surface. The holder is pivotally connected to the base and compresses the first resilient member. The holder comprises an accommodating space, and a card member is removably accommodated in the accommodating space. The second resilient member and the driving rod are also disposed in the accommodating space. The driving rod comprises a hook and a recess. The hook is against the second resilient member and is capable of driving the card member to move. The block portion restrains the driving rod on the base. Furthermore, the restriction between the driving rod and the block portion can be removed through the recess.