1 REPLACEMENT SPECIFICATION TITLE: RECHARGEABLE HEARING AID BACKGROUND OF THE INVENTION (a) Technical Field of the Invention 5 The present invention relates to a design of rechargeable hearing aid, particularly to an improvement of hearing aid, which is derived from the modem ones and can be recharged to facilitate the user to operate. Meanwhile, the costs of batteries can be minimized and the life of use of the hearing aid can be lasted. 10 (b) Description of the Prior Art Hearing aid is a great invention to those with bad faculty of hearing. Hearing deficiencies can be caused by tympanitis, living long time in harsh noise, inherent reasons, disease or inbred deficiency, aging, accidence, injury, medical hurt, etc. Fortunately, most people with bad faculty of hearing can 15 be helped by the hearing aid. Hearing aids of various function and features can satisfy different degree of hearing deficiency. Hearing aids nowadays are even programmed to make response to micro-sound, so as to transmit more clear and melodious sound to make the user better understanding. 20 However, most rechargeable hearing aids of prior art is provided with a 2 depression for receiving the battery which is connected to a liftable pivot. When the power is insufficient and the battery need be renewed, the user must open the small element carefully, take out the consumed battery and renew the battery. These operations are inconvenient to those aged who are the greatest 5 group using the hearing aids. The disadvantages could be: 1. The parts of the hearing aid are too small to be held in hands by those aged, given the blurred vision and shaking hands. 2. The size of the batteries for the hearing aid is overly small, rendering hard recognition of the negative and positive contacts. Therefore, 10 wrong installation would happen all the time and make the batteries get stuck. If the cover is further affixed by force, the locking pin would be broken, shortening the life of use of the hearing aid. 3. The battery for conventional hearing aid used to contain small volume and would be consumed in five days in the case of six hours 15 a day, or 3.75 days in thecase-of eight hours a day. At this rate, each user would consume about 100 batteries per year, each battery for US$3, costing US$300 per year. This is apparently uneconomic! 4. The estimated 100 batteries per year for each user would render a 20 problem in environment, in case those consumed batteries are not 3 properly recycled. 5. If the hearing aid is power insufficient in use, such as in the cinema, out for picnic, or ride at night, there is difficulty for the user to take the hearing aid to a place under the light for change of batteries. 5 The inconvenience caused by temporary hearing inefficiency is also bothersome. In view of the above, the invention provides a hearing aid structure without interference by the outside environmental cause.
4 SUMMARY OF THE INVENTION The primary object of the invention is to provide a rechargeable hearing aid, the power of which can be recharged by way of the simply designed battery charger which is adapted to the hearing aid. The invention can 5 facilitate those aged to easily operate anywhere. The secondary object of the invention is to provide a rechargeable hearing aid, the batteries of which need not be changed always, nor the components, such as cover, would be broken easily due to frequent operation. Another object of the invention is to provide a rechargeable hearing aid, 10 which can be portable with the user. The light on the battery charger can provide proper rays at the time of opening the cover and tugging the hinge element, so that the user can search out the socket for recharge purposes, even if in the outdoors without any light source. To obtain the above objects, the invention comprises a battery charger and 15 a hearing aid body. The battery charger presents an easily carried case, which is provided with a receiving groove and a battery chamber, which contains a dry battery for power supply. The receiving groove can receive the hearing aid body and is provided with connection terminals at two sides of the inner groove for flexibly locking the hearing aid body. A cover covers on 20 the receiving groove and is pivotally connected to the bather charger by a 5 hinge element, which is further connected to a switch, such that when the cover is on the position of "off', the battery can be in the process of recharge right away, and be quickly recharged with micro-voltage. To better understand the characteristics and structure of the present 5 invention, a detailed description of the preferred embodiments is further provided hereafter.
6 DESCRIPTION OF THE DRAWINGS FIG 1 is an exploded view of the invention. FIG 2 shows disposing the hearing aid into the battery charger. FIG 3 shows the battery charger with the cover closed. 5 FIG 4 is a perspective view of the back of the battery charger. FIGS. 5A and 5B show combining the batter charger with a carrying leather case. FIG 6 is a circuit diagram of the hearing aid body. FIG 7 is a circuit diagram of the interior of the battery charger.
7 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 to 4, the rechargeable hearing aid comprises a battery charger 10 and a hearing aid body 30. The battery charger 10 presents an easily carried case, which is provided with a receiving groove 11 and a battery 5 chamber 16. The receiving groove 11 provided at the front surface of the battery charger 10 is adapted to the shape of the hearing aid body 30, and is provided with flexible connection terminals 12 at two sides of the receiving groove 11. The receiving groove 11 is pivotally connected to a cover 13 by way of a hinge element 21, and the battery charger 10 is provided with a 10 charging indicator 19 and a light 20. A switch (not shown) for the light 20 is connected to the hinge element 21 (inside of the housing, not shown) and controlled by the cover 13. The battery charger 10 is provided at the back with a clamping groove 14 for receiving a cleaning brush 15 and a battery chamber 16 which is provided with a cover 17 and is for disposing dry 15 batteries 18. The hearing aid body 30 is designed for adapting to human ears. A receiver is provided at the front end, and electric capacitors (contacts) at two sides. The circuits inside of the receiver comprise a microphone 301, a plurality of resistors, a variable resistor 302, a plurality of electric capacitors 20 and chips, and an earphone 304.
8 Referring to FIGS. 5A and 5B, the invention is further provided with a leather case 25 for containing the battery charger 10. As the back of the leather case 25 is provided with a buckled clip 26 for fastening to the belt of the user, it not only can protect the battery charger 10, but also can facilitate 5 the user to carry with. As shown in FIG 6, the sound collected by the microphone 301 can be amplified by the amplifier circuits composed of the above-mentioned resistors, electric capacitors and chips, and then broadcasted through the earphone. The variable resistor 302 is used for adjusting the volume of the microphone 10 301, whereas one of the electric capacitors 303 (earphone contact) can provide power by way of connecting to the two contacts, such that when the hearing aid body 30 is in the status of power insufficiency, as the user can open the cover 13 of the battery charger 10, the light 20 would provide proper rays to ease the user to dispose the hearing aid body 30 in the receiving groove 11. 15 The electric capacitors 303 (contacts) will provide electric power through dry batteries 18 for recharging purposes. When the hearing aid body 30 is being recharged, the indicator 19 of the batter charger 10 will turn on to facilitate the user to recognize. As shown in FIG 7, the circuit inside of the battery charger 10 is composed 20 of two resistors, a chip, a light emitting-diode (indicator 19), a light 20, two 9 contact terminals and several dry batteries 18. Wherein the light 20 is connected to the switch (provided inside, not shown) connected with the hinge element 21 and is controlled by the cover 13. Furthermore, the power provided by the battery charger 10 mentioned in 5 the aforesaid embodiment is from dry batteries 18 in the battery chamber 10 provided inside of the battery charger 10. In another preferred embodiment (being a prior art without shown by a drawing), the invention can be provided with an AC/DC transformer. A socket is provided at the battery charger 10 for plugging the transformed power for use at home. Being recharged by 10 household AC power, the hearing aid body 30 can be carried with the user for use outside after completing recharge. Although a preferred embodiment of the invention has been described above by way of example only, it will be understood by those skilled in the field that modifications may be made to the disclosed embodiment without 15 departing from the scope of the invention, which is defined by the appended claims. Concluded above, the invention can facilitate the user to operate the rechargeable hearing aid, curtail costs, last the life of use. The utility in commerce and industry is doubtless, as claimed by the inventor.