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SYSTEM FOR HEAT DISSIPATION FROM HAND-HELD INSTRUMENTS USING SELECTIVELY INSULATED METAL FINS

IP.com Disclosure Number: IPCOM000171691D
Publication Date: 2008-Jun-16
Document File: 6 page(s) / 56K

Publishing Venue

The IP.com Prior Art Database

Abstract

This disclosure describes a system for dissipating heat from the interior of a hand-held instrument to the external environment using a heat sink including a metal shield and selectively insulated metal fins.

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system For Heat dissipation from hand-held instruments using selectively insulated Metal fins

This disclosure describes a system for dissipating heat from the interior of a hand-held instrument to the external environment using a heat sink including a metal shield and selectively insulated metal fins.

The system enables heat dissipation from the interior of a hand-held instrument to the external environment using a heat sink. The heat sink includes a metal shield that extends outside the hand-held instrument and includes metal fins selectively coated with a low thermal conductivity material. In an example, the hand-held instrument includes radio frequency (RF) circuits that are enclosed between a pair of metal shields. Typically, one or more of the metal shields is placed near the back of the hand-held instrument to dissipate heat. In the disclosed system, the metal shield placed near the back of the hand-held instrument acts as the heat sink. The heat sink extends outside the hand-held instrument and includes metal fins that protrude outwards from the casing of the hand-held instrument. An outer periphery of the heat sink is provided with environmental sealing.

The metal fins are made of a high thermal conductivity metal and hence, rapidly transfer the heat produced within the hand-held instrument to the external environment. The metal fins effectively dissipate the heat generated inside the hand-held instrument and hence, maintain the temperature of the hand-held instrument within safe and comfortable limits. The metal fins are selectively coated with a low-thermal conductivity material in such portions that may come in contact with a user’s skin. The coating prevents the user’s skin from getting burnt or damaged during normal usage of the hand-held instrument. The shape of the metal fins is customizable based on the appearance and functionality of the hand-held instrument.

Thus, the high thermal conductivity metal fins, selectively coated with the low thermal conductivity material, facilitate dissipation of the heat produced within the hand-held instrument in an effective and safe manner. Hence, the temperature of the hand-held instrument is maintained within safe and comfortable limits.

Fig. 1A is a perspective view of a hand-held instrument 100 in which various examples of the system may be practiced. The perspective view shows a cutting line 1-1’, which is parallel to the z axis. A cross-sectional view of hand-held instrument 100 along cutting line 1-1’ has been explained in detail in conjunction with Fig. 1B. Examples of hand-held instrument 100 include, but are not limited to, RF measurement and testing devices such as Spectrum Network Analyzers (SNAs), Vector Network Analyzers (VNAs) and other types of systems and instruments.

Fig. 1B is a cross sectional view of hand-held instrument 100 in w...