Embodiments herein relates to an electrical device and a method therein in general and more particular to an electrical device connectable to a connector head by means of magnetic force and a method therein.
In modern electrical devices an important feature is to connect the electrical device to any kind of accessory. One way to connect to the accessories is to use a cable. In the section below, the background will be described in the context that a charger is connected to a chargeable device, but it is understood that this also applies to any connection to an electrical device using any kind of cable.
With the increasing demands for mobility of modern electronics come increased demands for battery power. Increased battery power in a chargeable electrical device, such as a laptop, mobile telephone, camera etc. leads to longer stand by time, higher output power, possibility to connect more accessories to the chargeable electrical device etc. This also leads to higher demands on the charging process of the battery.
Another way to ensure that the charging connector head 102 stays connected to the chargeable electrical device 100 is to utilize some mechanical means such as a spring or a hook to keep the parts together. The spring or hook is not involved in the electrical connection.
A problem with the prior art is that over time the contact surfaces 105, 105′, and the mechanical means, get mechanically worn and loses their function. This may cause the charging connector head 102 to detach from the chargeable electrical device 100 unintentionally. Further, when the charging connector head 102 is attached to the chargeable device 100 it may also be damaged and stop function. Another problem with the prior art is that the charging socket 103 takes up a large space in the chargeable device.
Further, the charging connector head 102 has parts (not shown in
One way to improve the charging connection is to place a magnet (not shown) in the chargeable device 100 and another magnet (not shown) in the charging connector head 102 illustrated in
However problem with such a solution is that some parts of modern electrical devices may be sensitive to magnetic fields. One example of such a part could for example be a compass in a mobile telephone. Magnetic cards such as credit cards may also be sensitive to magnetic fields if a magnet is placed close to them. This could for example occur if a credit card and an electrical device comprising a magnet are placed in the same pocket. It is possible to at least some extent shield the magnetically sensitive parts from the magnetic field but this shielding requires space in the chargeable electrical device 100. In small electrical devices, such as mobile phones, available space is a scarce resource.
A common drawback between both magnetic and mechanical systems is that the force that is used for securing the connection must be overcome by the user when the charging connector head 102 shall be disconnected from the chargeable electrical device 100. Thus, there is a design tradeoff between a good secure connection when the charging connector head 102 is attached, and an easy way for the user to release the charging connector head 102 with minimum force. For mechanical couplings this drawback may be overcome with a mechanical release mechanism, but for the magnetic systems there is currently no such mechanism.
This leads to problems with wear in mechanical couplings or introducing magnetic fields that interfere with components of the electrical device.
It is therefore an object of embodiments herein to provide an improved way of connecting an electrical device to a connector head.
According to a first aspect of embodiments herein, the object is achieved by an electrical device which is able to connect to a connector head. The connector head comprises a magnet or an electromagnet. The electrical device comprises an electromagnet or a magnet that is able to connect magnetically to the magnet or electromagnet of the connector head, when supplied with electrical power. The electrical device further comprises an electromagnet controller which is connected to the electromagnet and is able to control the power supply of the electromagnet in dependence of an event occurring in the electrical device.
According to a second aspect of embodiments herein, the object is achieved by a method in the electrical device. The electrical device is connectable to a connector head comprising a magnet. The method comprises controlling a supply of electrical power to an electromagnet comprised in the electrical device in dependence of an event appearing in the electrical device. The electromagnet is thereby magnetically connectable to the magnet when supplied with electrical power.
According to a thirdfourth aspect to embodiments herein, the object is achieved by a computer program product loadable into the memory of a computer. The computer program comprises software code portions adapted for performing one or more actions described herein and/or realizing any or more of the features relating to the electrical device.
Since the electromagnet of the electrical device is controlled by the device itself the magnetic field within the electrical device is optimized in relation to the current needs, without introducing unnecessarily high magnetic interference with magnetically sensitive parts which may deteriorate their functionality.
An advantage of embodiments herein is that the electrical device keeps the advantages of a permanent magnet, without introducing its drawbacks.
Another advantage of embodiments herein is that the magnetic force can be controlled, e.g. low force for guidance, high force for secure connection and reverse force for releasing the connector head.
Another advantage of embodiments herein is that the magnetic field may be lowered or turned off completely when using functions sensitive to magnetic fields.
Another advantage of embodiments herein is that the electromagnet may be switched off when not in use, reducing the problems with magnetic fields in the electrical device.
Examples of embodiments herein are described in more detail with reference to attached drawings in which:
Embodiments will be exemplified in the following non-limiting description.
The electromagnet 203 of the electrical device 200 is placed adjacent to the socket 204 and is controlled by the electromagnet controller 202. The electromagnet controller 202 may control the magnetic field generated by the electromagnet 203 by sending an electromagnet control signal 210 to the electromagnet 203. The magnetic field may be increased or decreased depending on an event appearing in the electrical device 200.
The electrical device 200 comprises the electromagnet 203. When supplied with electrical power, the electromagnet 203 is magnetically connectable to the magnet 206 of the connector head 205. The electrical device 200 further comprises an electromagnet controller 202 connected to the electromagnet 203 and adapted to control the power supply to the electromagnet 203 in dependence of an event occurring in the electrical device 200.
The connector head 205 comprises a magnet 206 adapted to connect magnetically to the electromagnet 203 of the electrical device 200. The magnet 206 may be an electromagnet or a permanent magnet or any kind of magnetic material e.g. a metal plate. The connector head 205 has a contact surface 213 where the connector head 205 may connect to the contact surface 213′ of the socket 204 of the electrical device 200. The connector head 205 also comprises a wire 207 adapted to connect to its corresponding wire 212 of the electrical device 200 at the socket 204.
The connector head 205 being attached to the electrical device 200 may be any kind of connector head such as a connector head of a charger for charging the battery 201, a connector head 205 of a signal cable such as a High-Definition Multimedia Interface (HDMI) or Universal Serial Bus (USB) cable, or a connector head 205 of a cable to e.g. an external speaker. It should be understood that by the term “connector head” is meant an end part of the connector, which end part comprises the contact surface that is configured to be brought in contact with the contact surface of the electrical device 200.
As previously described, the connector head 205 is attached to the electrical device 200 at the socket 204. The socket 204 where the connector head 205 may connect may be a formation in the electrical device 200, a flat surface or any other mechanical coupling according to prior art. The connector head 205 comprises a magnet 206. The electrical device 200 has an electromagnet 203 that is capable of magnetically connect to the magnet 206 of the connector head 205, and keep the connector head 205 connected to the electrical device 200 when supplied with electrical power.
The event may be an event generated internally in the electrical device or by any kind of input from the user of the electrical device.
Below are some non-limiting examples of what the event could be.
In some embodiments, the connector head 205 is a connector head of a charger adapted to charge the battery 201 of the electrical device 200. An external event may then be a user indication event to the electrical device 200 that the charger will be removed by the user. This may be indicated via a button or any other user input means to the electrical device 200. Then the electromagnet controller 202 may send an electromagnet control signal 210 to the electromagnet 203 to decrease the power supply and thus decrease or completely turn off the magnetic force between the electrical device 200 and the connector head 205.
In some embodiments, the event may be an internal event. The internal event may be a battery indication event indicating to the electromagnet controller 202 that the battery 201 is fully charged. Then the electromagnet controller 202 may send an electromagnet control signal 210 to decrease the power supply to the electromagnet 203 which will be described below. Thus decrease or completely turn off the magnetic force between the electrical device 200 and the connector head 205.
The event may further be a timing event indicating that the connector head 205 has recently been connected to the electrical device 200. In such case the electromagnet controller 202 may send an electromagnet control signal 210 to increase the power supply to the electromagnet 203 and thus to increase the magnetic force between the electrical device 200 and the connector head 205.
The event may further be an estimation event, estimating that the electrical device 200 estimates when the connector head 205 will be disconnected by the user. This may be estimated by any kind of historical information or user behavior. For example the electrical device 200 may have information about the user's schedule via a calendar. In this case it may be likely that the user will disconnect the connector head 205 before heading off to a meeting and the electromagnet controller 202 may send an electromagnet control signal 210 to decrease the power supply to the electromagnet 203 and thus to decrease the magnetic force between the electrical device 200 and the connector head 205.
The event may further be a magnetically sensitivity event indicating that a magnetically sensitive part within the electrical device 200 or close to it is to be activated. This means that the magnetically sensitive part will be activated and then the electromagnet controller 202 sends an electromagnet control signal 210 to decrease the power supply to the electromagnet 203. One such magnetically sensitive device may be a compass in a mobile phone.
The connector head 205 may further be a connector head of a signal cable such as a HDMI cable for transferring media content, such as a movie from the electrical device 200 to e.g. an external display. An event in this case may be that the movie has come to an end. In this case the electromagnet controller 202 sends an electromagnet control signal 210 to decrease the power supply to the electromagnet 203.
The electromagnet controller 202 may be connected to or may be a part of a device controller 209 of the electrical device 200. The device controller 209 may be any kind of Central Processing Unit (CPU) or any other logic within the electrical device 200. The device controller 209 may send a device control signal 211 with information to the electromagnet controller 202 about the event. The device controller 209 may have information about the event occurring either internally in the electrical device 200 or externally outside the electrical device 200. Information about the event may be sent to the electromagnet controller 202 with the device control signal 211.
As previously mentioned, in some embodiments, the electrical device 200 may comprise a permanent magnet 208 adapted to give the user a guiding force to the user when connecting the connector head 205 to the chargeable device 200.
The permanent magnet 208 should preferably be small enough to not introduce any interference in the electrical device or its surroundings.
The electromagnet 203 may be implemented in different ways and below are some non-limiting embodiments described.
The electromagnet 300 may comprise at least one magnetization wire 301 formed into a coil 302. The magnetization wire 301 is connected to the battery 201 (not shown in
The magnetic field, generated by the electromagnet 300, may be increased by wrapping the magnetization wire 301 around an iron core 303. In
Further, the magnetic field may be controlled by an electromagnet control signal 210, 304 from the electromagnet controller 202. By sending the electromagnet control signal 210, 304 to a switch 305 configured to control power supply to the electromagnet 300, the electromagnet controller 202 may turn on or off the electromagnet 300. The switch 305 may be comprised in the electromagnet 300 as schematically illustrated in
According to some other embodiments, the electromagnet 400 is constantly supplied with electrical power from the power source 409 to provide a constant magnetic field giving a guiding force to a user when connecting the connector head 205 to the electrical device 200. The magnetic field in this case may preferably be lower than the case when the magnetic field keeps the electrical device 200 connected to the connector head 205, in order to save power and not introduce unnecessary magnetic fields.
Some embodiments of a method in the electrical device 200 for controlling supply of electrical power to the electromagnet will now be described with reference to the flowchart depicted in
The electromagnet controller 202 may in some embodiments receive a device control signal 211 from the device controller 209. The device control signal 211 may comprise information about an event occurring in the electrical device. This could e.g. be an event as described above or any other event. The device control signal 211 may indicate to the electromagnet controller 202 whether or not the electromagnet controller 202 should send an electromagnet control signal 210 to the electromagnet 203, 300, 400 in order to increase to decrease the power supply to the electromagnet 203.
The electromagnet controller 202 controls the power supply to the electromagnet 203. The electromagnet controller 202 may control the supply of electrical power to the electromagnet 203 by sending an electromagnet control signal 210 to the electromagnet 203. The electromagnet control signal 210 is sent in dependence of the event occurring in the electrical device 200. Depending on the event the electromagnet controller 202 may control the electromagnet 203 by controlling whether the power supply to the electromagnet 203 should increase or decrease. In this way the electromagnet 203 may magnetically connect to the magnet 206 of the connector head 205 when the electromagnet 203 is supplied with electrical power. The action 520 may further comprise that a magnetic field is generated in the electromagnet 203, 300, 400 when supplied with electrical power.
According to some of these embodiments the magnet 206 in the connector head 205 may be an electromagnet.
An electrical device 600 comprising a magnet 608 is connectable to a connector head 605 comprising an electromagnet 606. The electromagnet 606 is magnetically connectable to the magnet 608 of the electrical device 600 when supplied with electrical power. The electrical device 600 comprises an electromagnet controller 602 configured to be connected to the electromagnet 606 and adapted to control the power supply to the electromagnet 606 in dependence of an event occurring in the electrical device 600.
The electromagnet controller 602 may be connected via a device control signal 611, to a device controller 609 having the same functionality as the device controller described in relation to
The magnet 608 may be a permanent magnet, a magnetic metal plate or an electromagnet. If the magnet 608 is an electromagnet it may be controlled by the electromagnet controller 602.
The electromagnet 606 may be supplied with electrical power from the charger 603 or via the electrical device 600.
According to some another embodiments the electromagnet controller 602 may be comprised in the charger 603 or in the connector head 605 adapted to control the power supply in the electromagnet 606 in dependence of an event occurring in the charger 603 or in the connector head 605.
In embodiments described above reference has been made to an electrical device 200 comprising an electromagnet and/or a magnet and to a connector head comprising a magnet or an electromagnet. It should be understood that this also may be expressed as the electrical device comprises a first magnetic means and as the connector head comprises second magnetic means.
The first magnetic means may be an electromagnet 203 as described in
Further as described with reference to
According to some aspect of embodiments herein, the object is achieved by an electrical device which is able to connect to a connector head. The connector head comprises an electromagnet. The electrical device comprises a magnet that is able to connect magnetically to the electromagnet of the connector head, when the electromagnet is supplied with electrical power. The electrical device further comprises an electromagnet controller which when connected to the electromagnet and is able to control the power supply of the electromagnet in dependence of an event occurring in the electrical device.
According to some aspect to embodiments herein, the object is achieved by an electrical device which is able to connect to a connector head. The connector head comprises a magnet. The electrical device comprises an electromagnet that is able to connect magnetically to the magnet of the connector head, when supplied with electrical power. The electromagnet further comprises an electromagnet controller which is connected to the electromagnet and is able to control the power supply of the electromagnet in dependence of an event occurring in the electrical device.
Some embodiments may also comprise a computer program product loadable into the memory of a computer. The computer program may comprise software code portions adapted for performing one or more actions described above and/or realizing one or more of the features relating to the electrical device 200.
When using the word “comprise” or “comprising” it shall be interpreted as non-limiting, i.e. meaning “consist at least of”.
The embodiments herein are not limited to the above-described preferred embodiments. Various alternatives, modifications and equivalents may be used. Therefore, the embodiments should not be taken as limiting the scope of the invention, which is defined by the appending claims.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2012/050638 | 1/17/2012 | WO | 00 | 6/10/2014 |
Number | Date | Country | |
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61562568 | Nov 2011 | US |