Patent Application
20090116678
1. Field of the Invention
This invention relates to wireless communication, and more specifically to improvements in wireless headsets for use with cellular telephones and similar devices.
2. Description of Related Art
A headset may be used in conjunction with a telephone device for several reasons. With a headset, the user is relived of the need to hold the phone and thus retains his or her hands free to perform other functions. Headsets also function to position the earphone and microphone portions of a telephone close to the user's head to provide for clearer reception and transmission of audio signals with less interference from background noise. Headsets may be used with telephones, computers, cellular telephones, and other devices.
The wireless industry has launched several after-market products to free the user form holding the phone while making phone calls. For example, various headsets are manufactured with an earpiece connected to a microphone and most of these headsets or hands-free kits are compatible with any phone brand or model. A possible headset can be plugged-in to the phone and comprise a microphone connected via wires to the headset so that the microphone, when in position, can appropriately capture the voice of the user. Other headsets are built in with a Bluetooth chip, or other wireless means, so that the voice conversation can be wirelessly diverted from the phone to the earpiece of the headset. The Bluetooth radio chip acts as a connector between the headset and a Bluetooth chip of the cell-phone.
An important aspect for headsets is that they be able to fit the head and facial geometry of a variety of users, yet most headsets typically do not allow for adjustment to meet variations between users. Also, a headset may be more convenient if there is an easy way to carry it with the user when the user desires not to have it mounted on the ear.
What is called for is a headset which enhances the ability of the user to adjust the headset geometry to fit the user's head and face, as well as a headset which enhances the convenience of using and storing the headset.
A headset which includes a metal or metallic housing to which various accessory components can be attached. These components can include an ear loop, a necklace for the holding of the headset while not being worn on the ear, an external mount, and other components. The components include a magnet which facilitates mounting to the headset. The components are not restricted to a particular attach point, which enhances the ability of the user to adjust the geometry for better fit. An earloop with an inelastic central range allowing for better fit.
In some embodiments, the microphone may be a deployable microphone that deploys with the use of a microphone boom. The microphone boom may be stowed into the main body 151. The microphone is seen to be at an inner edge of the main body 151, and not in the center of the main body. In some embodiments, the microphone boom may stow into a position along the main body.
Although the present invention has been disclosed using embodiments of wireless headsets, other types of headsets including wired headsets may be utilized in other embodiments.
Referring to
The ear loop base 206 may be positioned by the user to a position that better fits the particular geometry of the user's ear and head. The distance 211 between the earpiece 209 and the ear loop base 206 may be altered by the placement of the ear loop base 206 on the surface 204 of the inner housing 203. The ear loop base 206 may be moved vertically 212 or horizontally 213. The magnet 206 attaching the ear loop base 206 to the inner housing 203 may be of a strength that allows relatively easy removal from the headset but of sufficient strength that the ear loop 205 will not dislodge from the headset while being worn by the user in normal operation.
The headset can be used by the user in a geometry that best suits the user. In addition, the ear loop may be removed from the main body should the user so desire. The headset may be worn using just the earpiece as the attachment to the user in some cases. However, the user may desire a more secure attachment to the head and then can utilize the removable ear loop as well. In addition, the removal of the ear loop may allow for safer storage of the headset when not being worn. The magnetically permeable surface on the main body also allows for attachment of other accessories, or methods of storage, with the ear loop either still attached or removed.
The earpiece junction 402 attaches the main body 408 to the earpiece 401, seen in exploded view in
The socket engaging end surface 422 has a central hole 403 through the earpiece junction 402 in some embodiments. In some embodiments, the central hole 403 is a conduit through which wires pass to a speaker within the earpiece. In some embodiments, the central hole 403 is a sound channel through which sound is channeled from a speaker on the main housing side of the flexible joint. The ear engaging body 407 is adapted to fit into the ear canal of the user and to support the headset 400 on the user in some embodiments. Although described in the context of a speaker, the audio device may be a driver or other appropriate device.
With the combination of adjusting the relative angle of the earpiece to the main body, as well as the position of the ear loop relative to the earpiece, the user is able to adjust the headset to maximize fit and comfort.
Although the illustrations of embodiments show an earpiece, in some embodiments the headset may not have an external earpiece. For example, the headset may have a flush mounted, recessed, or raised speaker (or other audio driver) on the main body of the headset. The movable ear loop assembly may be used with such a headset as well.
The user may choose to partially deploy the microphone based upon the user's preference, or also based upon the user's head size and shape. The partial or full microphone deployment, in combination with the adjustable ear loop, or in combination with the adjustable ear loop and the flexible joint of the earpiece, or some combination of all of the above, gives the user the ability to adjust the headset for best fit and function.
The ear loop base 606 may be positioned by the user to a position that better fits the particular geometry of the user's ear and head. The distance between the earpiece 609 and the ear loop base 606 may be altered by the placement of the ear loop base 606 on the surface 604 of the inner housing 603. The ear loop base may be moved vertically or horizontally. The magnet attaching the ear loop base to the inner housing may be of a strength that allows relatively easy removal from the headset but of sufficient strength that the ear loop will not dislodge from the headset while being worn by the user in normal operation. In some operational modes, the user will desire to use the headset without the ear loop assembly attached to the headset. For example, the headset may stay well mounted to a user's ear during the activity in which they are engaged, such as sitting or driving. While engaging in other activities which may more rigorously jostle the headset, the user may desire to use the ear loop in order to achieve a more secure fit. Some users may desire to use the ear loop during all use.
In some embodiments, the magnetically permeable material to which the magnet of the ear loop base will adhere may not be external to the main surface of the inner face of the main body. The magnetically permeable may be a layer under the surface in some embodiments.
The microphone 656 has been deployed with an extendable microphone boom 662 which was stowed within the main body 601. The microphone boom 662 consists of a first boom section 660 and a second boom section 661. The microphone boom 662 is a telescoping boom in this embodiment; the second boom section 661 stows into the first boom section 660 when the microphone boom 662 is stowed.
The ear loop base 706 may consist of a magnet coated with a material such as TCE in some embodiments. The back surface 716 of the ear loop base 706 may be substantially flat to allow for better magnetic attachment to the magnetically permeable surface of the headset to which it will be magnetically attached. The magnet may be of neodymium iron boron in some embodiments. The magnet may be 12 mm in diameter and coated with TPE of a thickness of 0.3 mm in some embodiments. There may holes 717 in the coating through to the magnet in some embodiments.
The separate material of the curved portion of the ear loop may be a shape memory alloy (SMA). In some embodiments, the SMA may be in superelastic form, with the shape of the ear loop set into the material. In this case, the ear loop will have extreme durability as it can be bent through misuse and return to its original shape without set or breakage.
In another embodiment of the present invention, the curved portion of the ear loop may be of an SMA with a different property, allowing for a central inelastic range.
The ear loop has been designed to allow for some particularly useful properties. To allow for further adaptability of the ear loop to the particular facial geometry and preferences of a user, the ear loop may be easily positioned within a central range. The central range 208 may have a first end 206 and a second end 207. Within the central range, the boom may be easily pushed into a position desired by the user, and it will stay in that position. Thus, an individual user may set the ear loop to a position that the user finds comfortable or otherwise appropriate for use. When the ear loop is pushed past the limits of the central range, into the areas outside the central range, the ear loop will have elastic properties. The ear loop may pushed far outside the central range and will spring back to, or near to, the limit area of the central range. The center of this central range may be the nominal original position set during the first heat treatment.
An exemplary embodiment of the ear loop is as follows. The first section 203 has an outside diameter of 1.40-1.44 mm, a wall thickness of 0.07-0.12 mm, and a length of 48 mm. The second section 204 has an outside diameter of 1.08-1.12 mm, and wall thickness of 0.07-0.12 mm, and a length of 47.5 mm. The material is a NiTi material starting with an ingot of binary NiTi alloy produced by smelting Sponge Ti and electrolytic Ni. The ingot is forged into a 35 mm diameter rod, rolled into a thin 8 mm diameter NiTi rod, a hole is then put into the rod to form a tube, and then the tube is drawn into the tubing of the desired geometry over several steps. The tubing is placed in a form, which holds it in a curved position, and treated. The initial treatment is a heat treatment of about 480-580 C for 10-30 minutes. This initial treatment sets the bend of the aforementioned ear loop. This results in the ear loop described above having superelastic properties.
A further treatment is used to create the central region of inelastic deformation around the set bent shape. The material is then heat treated at 300-550 deg C. for 30 min to 2 hours. After the second treatment, the central region of inelastic deformation will be seen in the material.
A typical material will have a central bending range that is elastic, wherein small deflections behave in a spring like fashion. As the material is deflected further, an elastic limit is reached wherein the stress has exceeded the amount under which the material retains its elastic properties. With further deflection, plastic deformation occurs, and the material will not return to its original position upon unloading.
A superelastic material, such as Nitinol (NiTi) may exhibit elasticity over large levels of strain. The increased flexibility obtained in these materials by undergoing large elastic strain can improve their performance. At low levels of stress, the material exits in an austenite phase. Upon further loading, the material undergoes a stress-induced transformation from the austenite phase to a martensite phase. The material behaves as linear elastic in both austentite and martensite phases, however, the modulus of elasticity in the two phases is different. During the stress induced transformation from austenite to martensite there is very little change is stress, but a large increase in strain. Beyond the transitions region in the martensite phase ultimately results in permanent unrecoverable set in the material, while unloading for cases that do not reach the transformation state follow the elastic modulus.
The ear loop with the second heat treatment behaves differently and offers other distinct advantages. The central inelastic range allows the user to position the ear loop around the user's face in a manner that is more specific to a particular user. For example, the material may be bent at differing radii of curvature at different points along the length of the boom. Also, although the boom is positionable in this central range, the boom will be exceptionally durable for the consumer because the elastic properties outside the central range will greatly lower the likelihood of damage to the boom if it is sat upon or otherwise mistreated by the user.
The properties of the ear loop with the central range may be due to the setting of the martensite start (Ms) and the austenite finish (Af) temperatures. In most cases, a material will demonstrate elastic properties immediately upon the onset of strain. However, it is possible to set the material properties such that this is not the case, and that some strain must be added before the material moves into its pseudo-elastic range. This may then allow for inelastic material properties in a central range, and after the addition of enough strain induced stress, such as by moving through this central range, the elastic properties are seen. The effects described with regard to the ear loop above may be due to having room temperature (or the ear loop operation temperature) lying between the Ms and Af temperatures.
The inelastic properties in the central range are most probably a result of this being a region where the NiTi alloy is transitioning from austenite to a martensite phase. The highly elastic properties outside the central range are most probably due to an elastic martensite deflection, although the invention is not limited to a single theory.
As the stress during bending is related to the bending section, with material furthest from the bending center seeing the highest stress under bending, the breadth of the central inelastic range may be altered depending upon the selected bending section. For example, a smaller diameter tube will bend further before a certain stress is reached relative to a larger diameter tube. Thus, through manipulation of the bending cross-section one can manipulate the breadth of the central range.
As evident from the above description, a wide variety of embodiments may be configured from the description given herein and additional advantages and modifications will readily occur to those skilled in the art. The invention in its broader aspects is, therefore, not limited to the specific details and illustrative examples shown and described. Accordingly, departures from such details may be made without departing from the spirit or scope of the applicant's general invention.
This application is a continuation-in-part of U.S. patent application Ser. No. 11/543,467 to Bevirt et al., filed Oct. 4, 2006, which is a continuation-in-part of U.S. patent application Ser. No. 11/488,957 to Bevirt et al., filed Jul. 19, 2006, both of which are hereby incorporated by reference in their entirety. This application claims priority to U.S. Provisional Application No. 60/918,378 filed Mar. 15, 2007.
| Number | Date | Country | |
|---|---|---|---|
| 60918378 | Mar 2007 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11543467 | Oct 2006 | US |
| Child | 12077075 | US | |
| Parent | 11488957 | Jul 2006 | US |
| Child | 11543467 | US |
