耳溫槍的探測頭能夠深入鼓膜接近中樞下視丘的位置，具有能精準快速量測到人體核心溫度的優點。然而，早期的耳溫槍並無耳套脫離機構，只能單以手直接握住耳套拉開。而耳套作為防止多人共用同一耳溫槍時交互感染，同時不影響紅外線偵測，其材質特性一般會為薄軟結構型態，使得耳套極容易一受力就變形，增加手抓取施力的難度。再者，於卸除耳套時必須以雙手同時使用，對於需長時間工作的醫護人員極為不便。況且用雙手在卸除耳套時，手會碰觸到耳套，容易造成細菌傳染，增加醫護人員疾病感染的風險。分析目前市面上現有之兩種耳套脫離機構，槓桿式欠缺省力機制，而拉柄式則是難以單手操作。本研究針對耳溫槍使用頻率高的醫療院所，設計一新型耳套脫離機構，利用旋轉軌跡槽改良成的凸輪機構，加上槓桿原理的省力機制，並選擇適當的彈簧參數設計，幫助護理人員可以更省力且有效率地操作耳溫槍。最後製作原型機並進行實驗驗證，藉由量測扳手施力的力量值，證明其與直接將耳套脫離探測頭相比，有28%的省力效果；由重覆100次之可靠度測試實驗結果顯示，耳套脫離機構可達到100%的穩定性；壽命測試操作4000次結果顯示，在3500次的正常操作之後，僅發生3次的操作卡頓，驗證耳套脫離機構具有商品化可行性。

The ear thermometer is used to probe into the tympanic membrane, get close to the hypothalamus, and measure the core temperature of the human body accurately and quickly. However, the early ear thermometers did not have a mechanism for disengaging the probe cover, and users have to hold the probe cover directly and pull them away. The probe cover is used to prevent cross-infection when multiple people share the same ear thermometer, and it does not affect infrared detection. The material characteristics of the probe cover are generally thin and soft, so the probe cover is easy to deform during the assembly operation and difficult to grasp by hand. Furthermore, when removing the probe cover, both hands must be used at the same time, which is extremely inconvenient for medical staff who repeat this operation frequently. Moreover, it may easily cause bacterial infection and increase the risk of disease infection among medical staff if the probe cover is directly touched by hand. The probe cover detaching mechanisms currently on the market can be classified into two types. The lever type doesn't provide the function of effort saving,, while the handle type is difficult to operate with one hand. In this study, aiming at medical institutions where the ear thermometers are frequently used, a new type of probe cover detachment mechanism is presented. A cam mechanism with annular guiding groove is applied, and an appropriate spring is selected. Finally, the performance of effort saving, reliability, and durability are verified by prototype testing. Compared with removing the cover from the probe head directly, the presented mechanism provides a labor-saving effect of 28%. The reliability is 100% during the 100 times of operation. The durability is confirmed through 4,000 life test operations. The former 3,500 operations are smooth, only 3 times of stuck happened in the last 500 times of operation. Based on the results of experiments, this innovative probe detaching mechanism for ear thermometer is potential for commercial application.

[1]"200X Ear Thermometer Probe Covers Lens Filters Refill Caps for All Braun ThermoScan Models, BPA Free and Disposable for Braun Thermoscan." https://www.amazon.com/Thermometer-Filters-ThermoScan-Disposable-Thermoscan/dp/B07ZHZ8QVS (accessed March 8, 2022).
[2]"Braun ThermoScan® 5 Ear thermometer with ExacTemp® technology." https://www.braunthermometers.com/thermometers/braun-thermoscan-5-ear-thermometer-with-exactemp (accessed March 7, 2022).
[3]J. Huang and E. Chen, "Ear thermometer with a simple-structure and easy-operation probe-cover detaching mechanism," Patent US7494273, February 24, 2009.
[4]"Probe Covers for Medline Tympanic Ear Thermometer 100Ct." https://athome.medline.com/en/probe-covers-for-medline-tympanic-ear-thermometer-100ct-mds9701 (accessed February 8, 2022).
[5]M. Shigeru, S. Yoshihiko, N. Yasushi, and O. Hiroyuki, "Radiation clinical thermometer," Patent US5487607, January 30, 1996.
[6]C. Eric L. and C. Edward P., "Tympanic thermometer with modular sensing probe," Patent US6001066, December 14, 1999.
[7]M. Yamaka, "Probe cover detaching mechanism and ear type clinical thermometer," Patent US6367973, April 9, 2002.
[8]H.-T. Huang, M.-T. Chu, and H. Lin, "Mechanism for removing probe cover from a thermometer probe," Patent US6786636, September 7, 2004.
[9]C. M. Chen, H.-H. Shih, T. C. Yang, and Y. T. Yao, "Body temperature measuring device," Patent US9464940, October 11, 2016.
[10]J. W. Frederick, "Writing instruments having a retractable writing point," Patent US3120837, May 6, 1953.
[11]R. N. Kent, "Writing instrument," Patent US3205863, December 29, 1953.
[12]黃俊泓, "變焦鏡頭模組," Patent 中華民國 I451151, March 11, 2011.
[13]H. Nomura, Y. Yamazaki, I. Okuda, and S. Nakamura, "Lens barrel," Patent US6519096B2, March 21, 2002.
[14]D. G. Ullman, The mechanical Design Process. McGraw-Hill, 1997, pp. 98-119.
[15]顏鴻森, 吳隆庸, 黃文敏, 吳益彰, 藍兆杰, 現代機構學. 東華書局, 2020.
[16]小栗冨士雄, 小栗達男, 標準機械設計圖表便覽. 眾文圖書公司, 2005.