• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a holding and charging device (1) for a mobile terminal (2), in particular for smartphones and tablet computers, comprising a housing (10) in which a transmitting coil (11) and at least one shielding layer (12) is arranged wherein the releasable attachment of the mobile terminal (2) to the holding and loading device (1) is achievable by an operative connection with a permanent magnet (13) within the housing (10) and a ferromagnetic insert (22) of the mobile terminal, in which no disturbing thermal loads occur. This is achieved in that a first permanent magnet (13) and a second permanent magnet (13 ') within the housing (10) forming a layer within the layer are spaced from each other, wherein both permanent magnets (13, 13') opposite to each other in the longitudinal direction (L) of the holding and charging device (1) oriented are polarized and wherein the first permanent magnet (13) a first winding portion and the second permanent magnet (13 ') covers a second winding portion (W) of the transmitting coil (11).
    公开号:CH711496A2
    申请号:CH01282/15
    申请日:2015-09-07
    公开日:2017-03-15
    发明作者:Reinger Sascha
    申请人:Tecflower Ag；
    IPC主号:
    专利说明:

    Technical area
    The present invention describes a holding and charging device for a mobile terminal, in particular for smartphones and tablet computers, comprising a housing in which a transmitting coil and at least one shielding layer is arranged, wherein the releasable attachment of the mobile terminal to the holding device and charging device is achievable by an operative connection with a permanent magnet within the housing and a ferromagnetic insert of the mobile terminal.
    State of the art
    The desire to charge mobile devices or mobile devices wirelessly by induction has been around for some time. This is known under the collective term of wireless energy transmission in the near field, the technical applications are limited to areas between a few centimeters to meters.
    Chargers are commercially available on which you can easily hang up a mobile phone, smart phones, personal digital assistants, navigation devices or tablet computers and the charging process begins. For this purpose, a charging electronics is necessary, which is connected to a transmitting coil in a housing. In a receiving coil of the mobile phone, an alternating voltage is induced by the alternating current in the transmitting coil. The AC voltage in the receiver coil is rectified and the charge controller of the mobile phone for charging by means of receiving electronics; fed. In addition to an inductive coupling of the transmitting and receiving coil and a resonant inductive coupling can be performed. These procedures have been carried out for quite some time and standards such as Qi and Powermat have become established, by means of which different smartphones of different manufacturers can be charged by induction on different holding and charging devices, regardless of the manufacturer of the respective terminal.
    Now holding and charging devices are in demand, which, for example, a mobile phone can not only charge horizontally lying on a table, but allow installation of the mobile phone. Accordingly, the mobile phone or mobile terminal must be kept detachable.
    For this purpose, a holding and charging device is known which accomplishes a mounting of the mobile telephone by means of a plurality of permanent magnets, wherein the permanent magnets spaced from the transmitting coil are arranged outside the transmitting coil in a housing. The mobile device, e.g. The mobile phone is thereby held sufficiently well and it is even a vertical position of the mobile phone reachable. The centering of the mobile terminal or the receiving coil on the transmitting coil by mechanical means. Due to the sweeping arrangement of the permanent magnets outside of the transmitting coil region follows a large expansive structure of the housing and thus the holding and loading device. A further reduction does not seem possible, since the transmitting coil should be as large as possible and must have enough turns.
    In a further embodiment of a holding and charging device by utilizing a magnetic holding force for holding a mobile terminal, a permanent magnet was placed in the core of the transmitting coil, which ensures the required magnetic force to the mobile terminal. By provisions on or in the mobile device in the form of ferromagnetic inserts centering of the mobile terminal over the transmitting coil can be achieved, since the permanent magnet cooperates with the ferromagnetic insert. Both coils, transmitting coil in the holding and charging device and receiving coil in the mobile terminal must come to lie as exactly as possible on each other in order to achieve optimum energy transfer.
    With such a configuration with a central permanent magnet, the structure of the holding and loading device was greatly reduced in size. But as experiments have shown, thermal problems occur during operation. A strong increase in temperature of the permanent magnet and the charging electronics can be measured. These temperature increases can not be eliminated even with shielding layers, for example made of mu-metal with high permeability, since usually only low-frequency magnetic fields are well shielded. Such high temperatures permanently damage the charging electronics and the permanent magnet and must be avoided. The central permanent magnet could be made thicker for protection, so that the permanent magnet needs a longer time to heat up due to a higher mass. The charging electronics would also need to be shielded or operated at a lower power supply, which of course worsens the efficiency. So far no solution of a magnetic holder with efficient inductive charging has been found.
    Presentation of the invention
    The present invention has for its object to provide a holding and charging device with permanent magnetic coupling of a mobile terminal, with no disturbing thermal stress occurs and an automatic centering of the receiving coil is given to the transmitting coil.
    This object is achieved by a device having the features of claim 1.
    Brief description of the drawings
    Further features, details and advantages of the invention will become apparent from the following description of preferred embodiments of the invention and the drawings. They are shown in<Tb> FIG. 1 <SEP> shows a perspective schematic view of a holding and charging device and a mobile terminal in an exploded view.<Tb> FIG. 2a shows a schematic plan view of part of the sheet-like holding and loading device, the arrangement of the two permanent magnets relative to the winding sections of the transmitting coil, while<Tb> FIG. 2b shows a sectional view along the line A-A from FIG. 2a.<Tb> FIG. 3 <SEP> shows a system of a holding and loading device with detachably magnetically attached mobile terminal.
    description
    In the following, a holding and charging device 1 for a mobile terminal 2 or mobile device 2, in particular for a mobile phone, smartphone, personal digital assistant, navigation device or a tablet computer will be described. By means of magnetic force, the mobile terminal 2 is detachably attachable to the holding and loading device 1, whereby a system of mobile device 2 and holding and charging device 1 is formed.
    The holding and charging device 1 comprises a housing 10 in which a transmitting coil 11, a layer with two permanent magnets 13, 13 held by a holding frame 14 and a shielding layer 12 are stored stacked in a stack. The transmitting coil 11 is connected to a charging electronics 16, wherein the charging electronics 16 may be stored outside or inside the housing 10. Preferably, the charging electronics 16 is included in the housing 10 as part of the stack, in which case an insulating layer 15 should be inserted to shield magnetic fields to avoid interference.
    The housing 10 should be designed as thin as possible, so that a minimum distance between the mobile device 2 and the base surface wall 100 of the housing 10 is reached. The transmitting coil 11 is usually designed as a flat coil with a maximum possible number of turns, so that an optimized inductive or resonant inductive coupling of the transmitting coil 11 with a receiving coil 22 in the mobile device 2 results. Both coils 11, 22 usually have a central recess in which a winding-free space remains. Although the coils 11, 12 shown here have round cross-sectional areas, the present invention also works when the coils 11, 12 are formed with polygonal cross-sectional areas.
    For a coupling of mobile device 2 and holding and charging device 1 is possible, the mobile device 2 in addition to the receiving coil 22 must have a receiving electronics, which allows the charging of a battery 20. Today, most smartphones 2 are already equipped with receiver coil 22 and receiver electronics. In addition, the commercially available coupling agents additionally have an insulation layer 21 for shielding. In order to achieve a magnetic coupling at least one ferromagnetic insert 23 is installed within the mobile device 2. Should the mobile device 2 not include such a ferromagnetic insert 23 by default, a user can easily retrofit it, for example, by inserting a suitable cut sheet metal.
    As experiments have shown, it comes in the inventive holding and charging device 1 to the arrangement of a first permanent magnet 13 and a second permanent magnet 13 in a position relative to the transmitting coil 11, which will be explained in more detail below.
    As shown in Fig. 2a, both permanent magnets 13, 13 in a position on the transmitting coil 11, ie in the longitudinal direction L spaced from the transmitting coil 11 to come to rest. The turns of the transmitting coil 11 can be divided into two sections, a first winding section W1 and a second winding section W2. Both winding sections W1, W2 are part of all windings and divide the windings along a transverse direction (line A-A) of the transmitting coil 11, wherein the winding sections W1, W2 are shown here with identical cross-sectional areas or congruent.
    The transmitting coil 11 forms a plane and is designed as a flat coil. The first and the second permanent magnet 13, 13 are magnetically differently polarized, each placed on a winding section W1, W2. The permanent magnets 13, 13 are aligned separately in their plane. Again, the permanent magnets 13, 13 are preferably flat. While the north pole N of the first permanent magnet 13 lies above the plane of the paper of FIG. 2a, the south pole S is located above the plane of the paper in the case of the second permanent magnet 13.
    The holding frame 14 holds the permanent magnets 13, 13 fixed in a plane locally and parallel to the position of the transmitting coil 11, wherein it is prevented that two permanent magnets 13, 13 form an unwanted magnetic connection. A contact of the permanent magnets 13, 13 is thus excluded. Here, the holding frame 14, designed in two parts, wherein the holding frame 14 recesses for both permanent magnets 13, 13 includes. The holding frame 14 should be matched to the permanent magnets 13, 13 such that as much surface of the permanent magnets 13, 13 is exposed.
    The holding frame 14 holds both permanent magnets 13, 13 in a position parallel to the position of the transmitting coil 11. The permanent magnets 13, 13 can partially cover the winding-free space of their associated Windungsabschnitte W1, W2. The holding frame 14 must then be adapted accordingly to the configuration of the permanent magnets 13, 13.
    Experiments have shown that optimum holding results are achieved when the permanent magnets 13, 13 are fixed such that there is a gap between them, wherein the spaced apart in the longitudinal direction L transmitting coil (11) in the region of the intermediate space also designed at least partially without winding is.
    The different polarizations of the permanent magnets 13, 13 are clearly visible in Fig. 2b, wherein the magnetic field lines are schematically represented by arrows which extend from the respective north pole N to the south pole S. Each permanent magnet 13, 13 completely covers the turns of the winding section W1, W2 assigned to it. The widths of the winding sections W1, W2 can, however, also be wider than the widths of the permanent magnets 13, 13, so that the windings overlap the permanent magnets 13, 13 in the position of the transmitting coil 11. The diameter of the permanent magnets 13, 13 should be greater than or equal to the width of the turns in the winding sections W1, W2, so that a sufficiently high magnetic holding force can be achieved.
    In Fig. 3, an embodiment of a holding and charging device 1 is shown, wherein a mobile terminal 2 is held magnetically here approximately in the form of a smartphone 2 vertically aligned. Due to the effect of the permanent magnets 13, 13, an automatic alignment and centering of the smartphone 2 on the holding and loading device 1 takes place. In this case, a releasable attachment takes place, wherein the receiving coil 22 of the smartphone 2 and the transmitting coil 11 of the holding and charging device 1 are placed in the smallest possible distance relative to each other. By arranging a ferromagnetic insert 23 on or in the mobile terminal 2 and the interaction of both permanent magnets 13, 13, the mobile terminal 2 is held such that the ferromagnetic insert 23 in the transverse direction between the two permanent magnets 13, 13 comes to rest.
    The permanent magnets 13, 13 used are in particular rare earth magnets comprising an alloy of neodymium-iron-boron. This sufficiently high magnetic forces can be reached, which can hold smartphones and tablet computers. In particular, permanent magnets 13, 13 with a round cross-sectional area are to be used.
    For the shielding layer 12 and the insulating layer 15 Mu metal is usually used, which is characterized by a high permeability. For a shielding effect can be achieved, the magnetic interference, for example, from the transmitting coil 11 or the charging electronics 16 stops, creating a screen attenuation is achieved. Such layers of mu-metal are dimensionally stable but brittle and must be protected from bending stresses. Since mu-metal is expensive, as thin as possible layers are used, which should be additionally reinforced with adhesive layers. In a composite layer, as presented here within the housing 10, the Mu metal unfold its effect secured.
    With the presented holding and charging device 1 batteries 20 mobile devices 2 could be charged at full electrical power of the charging electronics 16, which were measured with a thermal imaging camera at different locations temperature peaks in the range up to a maximum of 50 ° C. This low thermal load has no harmful effects on the charging electronics 16 or other components of the holding and charging device 1 and guarantees a long operation of the holding and charging device 1. An automatic centering of the mobile terminal 2 on the holding and loading device 1 and Transmitting coil 11 on the receiving coil 22 is achieved by the magnetic force of the permanent magnets 13, 13 on the ferromagnetic insert 23. Since mobile terminal 2 is directed to the holding and charging device 1, that the ferromagnetic insert 23 between the permanent magnets 13, 13 comes to rest.
    LIST OF REFERENCE NUMBERS
    [0026]<tb> 1 <SEP> Holding and charging device<Tb> <September> 10 <September> Housing<Tb> <September> <September> 100 <September> footprint wall<tb> <SEP> 11 <SEP> Transmitting coil (flat coil)<tb> <SEP> W1 <SEP> first turn section<tb> <SEP> W2 <SEP> second turn section<tb> <SEP> 12 <SEP> Shielding layer (Mü metal)<tb> <SEP> 13, 13 <SEP> first and second permanent magnets<Tb> <September> 14 <September> holding frame<Tb> <September> 15 <September> insulation layer<Tb> <September> 16 <September> charging electronics<tb> 2 <SEP> Mobile device<Tb> <September> 20 <September> Battery<Tb> <September> 21 <September> insulation layer<Tb> <September> 22 <September> receiving coil<Tb> <September> <September> receiving electronics<tb> <SEP> 23 <SEP> ferromagnetic insert
    权利要求:
    Claims (10)
    [1]
    1. holding and charging device (1) for a mobile terminal (2), in particular for smartphones and tablet computers, comprising a housing (10) in which a transmitting coil (11) and at least one shielding layer (12) is arranged, wherein the detachable attachment of the mobile terminal (2) to the holding and loading device (1) by an operative connection with a permanent magnet (13) within the housing (10) and a ferromagnetic insert (22) of the mobile terminal is reached, characterized in thata first permanent magnet (13) and a second permanent magnet (13) within the housing (10) forming a layer spaced apart within the layer, wherein both permanent magnets (13, 13) opposite to each other in the longitudinal direction (L) of the holding and charging device (1) oriented polarized and whereinthe first permanent magnet (13) covers a first turn section (W1) and the second permanent magnet (13) covers a second turn section (W2) of the transmit coil (11).
    [2]
    2. holding and charging device according to claim 1, wherein each permanent magnet (13, 13) completely covers all turns of its associated winding section (W1, W2).
    [3]
    3. holding and charging device according to claim 1, wherein the permanent magnets (13, 13) are fixed such that between them a gap remains, in which the transmitting coil (11) in the longitudinal direction (L) spaced at least partially windings.
    [4]
    4. holding and charging device according to one of the preceding claims, wherein both permanent magnets (13, 13) are flat.
    [5]
    5. holding and charging device according to one of the preceding claims, wherein the position of the permanent magnets (13, 13) is configured parallel to the flat coil just executed.
    [6]
    6. holding and charging device according to one of the preceding claims, wherein both permanent magnets (13, 13) in a holding frame (14) immovably in the housing (10), a magnetic layer are formed forming.
    [7]
    7. holding and charging device according to claim 6, wherein the holding frame (14) is made in two parts and on the permanent magnets (13, 13) is tuned such that as much surface of the permanent magnets (13, 13) is exposed.
    [8]
    8. holding and charging device according to one of the preceding claims, wherein a shielding layer (12), in particular of mu-metal, between the transmitting coil (11) and the first and second permanent magnets (13, 13) is arranged.
    [9]
    9. holding and charging device according to one of the preceding claims, wherein the charging electronics (16) is also stowed in the housing (10) and between the permanent magnet layer and the charging electronics (16) an insulating layer (15) is arranged.
    [10]
    10. System comprising a mobile terminal (2) having a receiving coil (22), an electrical connection to a battery (20) and a holding and charging device (1) according to one of the preceding claims, wherein the mobile terminal (2) at least one ferromagnetic insert (23), with which the first and second permanent magnet (13, 13) of the holding and loading device is operatively connected, whereby a releasable attachment can be formed.
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    同族专利:
    公开号 | 公开日
    CH711496B1|2019-06-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-10-15| PFA| Name/firm changed|Owner name: TECFLOWER AG, CH Free format text: FORMER OWNER: TECFLOWER AG, CH |
    2021-04-30| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    CH01282/15A|CH711496B1|2015-09-07|2015-09-07|Holding and charging device for a mobile terminal.|CH01282/15A| CH711496B1|2015-09-07|2015-09-07|Holding and charging device for a mobile terminal.|
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