(19)
(11)EP 2 703 942 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
25.10.2017 Bulletin 2017/43

(21)Application number: 13179838.1

(22)Date of filing:  09.08.2013
(51)International Patent Classification (IPC): 
G06F 1/20(2006.01)

(54)

Heat dissipation device

Wärmeableitungsvorrichtung

Dispositif de dissipation de chaleur


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 29.08.2012 CN 201210314166

(43)Date of publication of application:
05.03.2014 Bulletin 2014/10

(73)Proprietor: Beijing BOE Optoelectronics Technology Co., Ltd.
Beijing 100176 (CN)

(72)Inventors:
  • Song, Yong
    100176 Beijing (CN)
  • Liu, Junguo
    100176 Beijing (CN)

(74)Representative: Klunker IP Patentanwälte PartG mbB 
Destouchesstraße 68
80796 München
80796 München (DE)


(56)References cited: : 
US-A- 5 329 829
US-A1- 2007 177 350
US-A1- 2003 218 862
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] Embodiments of the present invention relate to a heat dissipation device of a notebook computer.

    BACKGROUND



    [0002] Fig. 1 is a schematic view of a conventional heat dissipation device of a notebook computer. Referring to Fig. 1, heat generating elements in the notebook computer 20 mainly includes a graphics card 2 and CPU (central processing unit.) 1. The heat generated in the graphics card 2 and CPU 1 is transmitted to a radiator 4 in a heat dissipation component 21 by a heat guiding pipe 3, and then is blown out of the radiator 4 by a fan 5 in the heat dissipation component 21, so that the heat in the notebook computer 20 is dissipated.

    [0003] The above mentioned heat dissipation device has the following problems: the heat in the notebook computer 20 is not recycled but is discharged directly, resulting in waste of the heat energy. In addition, for the on-site worker using the notebook computer 20 outdoors, his hands are prone to be frozen stiff or even be frostbit when he operates a keyboard 6 at a low ambient temperature.

    [0004] US 2003/0218862A1 discloses a system including a user input device, a temperature changing unit coupled to the user input device, and a controller coupled to the temperature changing unit, for controlling the temperature of the user input device for heating (or cooling) the user input device in environments in which a user's hands are cold (or warm). Accordingly, in one example heat generated by a computer's processor chip (integrated circuit) is controllably diverted by a fan through the spaces between keys in a keyboard. In another example, a palm rest is heated using an electric heater beneath the palm rest, e.g. the palm rest is heated using a heat pipe that diverts heat from the processor chip or heat generated by the computer's processor chip is controllably diverted by a fan through holes in the palm rest. In another example, a thermoelectric cooler is preferably used to heat or cool the palm rest.

    [0005] US 5,329,829 discloses an indicating positive positioning selector knob lock, in which an interfering surface is disposed between a rotating selector knob and a stop to prevent unwanted rotation of the selector knob, wherein release of the stop requires displacement of the knob in an axial direction relative to the stop to bypass the interfering surfaces thereby permitting selective rotation of the knob.

    [0006] US 2007/0177350A1 discloses an laptop provided with an enclosure having a side wall in which vent holes are formed, wherein a heat generator is stored in the enclosure, a radiator is disposed adjacent to the vent holes, a heat receiver is thermally connected to the heat generator, a heat transmission member has one end thermally connected to the heat receiver and the other end thermally connected to the radiator, a fan is disposed adjacent to the radiator to generate cooling air toward the radiator, and a seal member that seals a gap formed between the radiator and the side wall having the vent holes is formed therein.

    SUMMARY OF THE INVENTION



    [0007] It is an object of the present invention to provide an improved heat dissipation device of a notebook computer.

    [0008] The object is solved by the features of the independent claims. Further developments and embodiments are defined in the respective dependent claims.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0009] In order to clearly illustrate the technical solution of the embodiments of the invention, the drawings of the embodiments will be briefly described in the following; it is obvious that the described drawings are only related to some embodiments of the invention and thus are not limitative of the invention as defined in the claims.

    Fig. 1 is a schematic view of a conventional heat dissipation device of a notebook computer;

    Fig. 2 is a schematic view of a heat dissipation device of a notebook computer according to an embodiment of the present invention;

    Fig. 3 and Fig. 4 are schematic views of controlling of the closing and opening of a heat transmitting path between a heat dissipation component and a keyboard by a second control structure and a second valve in the heat dissipation device according to the embodiment of the present invention;

    Fig. 5 and Fig. 6 are schematic views of controlling of the second valve by the second control structure in the heat dissipation device according to the embodiment of the present invention;

    Fig. 7 is schematic view of controlling of the second valve by the second control structure in the heat dissipation device according to the embodiment of the present invention;

    Fig. 8 is a schematic view of heat dissipation holes provided on the keyboard according to the embodiment of the present invention.


    DESCRIPTION OF THE EMBODIMENTS



    [0010] An embodiment of the present invention provides a heat dissipation device of a notebook computer 20, and the notebook computer 20 is provided with a keyboard 6. Fig. 2 is a schematic view of the heat dissipation device of the notebook computer according to the embodiment of the present invention. As shown in Fig. 2, the heat dissipation device includes a heat dissipation component 21 and a heat guiding box 7, the heat dissipation component 21 includes a heat guiding pipe 3, a radiator 4, and a fan 5, the heat guiding box 7 is connected between the heat dissipation component 21 and the keyboard 6, and the heat guiding box 7 is capable of transmitting the heat in the heat dissipation component 21 to the keyboard 6.

    [0011] Further referring to Fig. 2, after the heat generated in a graphics card 2 and a CPU 1 of the notebook computer 20 is transmitted to the heat dissipation component 21 by the heat guiding pipe 3, the heat enters into the inside of the keyboard 6 through the heat guiding box 7, so that the temperature of the keyboard 6 is increased. In this manner, the heat generated in the notebook computer 20 can be recycled effectively instead of being discharged directly, and thus waste of the heat energy can be avoided. In addition, when the on-site worker using the notebook computer 20 outdoors operates the keyboard 6 at low ambient temperature, his hands can receive the heat from the keyboard 6, and thus the case in which his hands are frozen stiff or even is frostbit can be avoided.

    [0012] The inner wall of the heat guiding box 7 may be coated with a heat insulating material, so as to reduce the loss of heat during the transmitting process. One or more heat dissipation holes 10 may be provided on the keyboard 6.

    [0013] When the keyboard 6 is provided with the heat dissipation holes 10, the heat is discharged through the heat dissipation holes 10, which is advantageous to the hands warmth of the on-site worker using the notebook computer 20 outdoors. Each of the heat dissipation holes 10 may have a circle shape, a rectangular shape, a triangle shape, or other suitable shapes.

    [0014] A second control structure 9 which is rotatable and a second valve 13 may be provided in the heat guiding box 7, so as to control the closing and opening of the heat transmitting path between the heat dissipation component 21 and the keyboard 6. The second control structure 9 is connected with the second valve 13 to control the second valve 13. When the ambient temperature is not low enough to harm the hands of the on-site worker using the notebook computer 20 outdoors, the heat transmitting path between the heat dissipation component 21 and the keyboard 6 is closed by the second control structure 9 and the second valve 13, as shown in Fig. 4. When the ambient temperature is low enough, the heat transmitting path between the heat dissipation component 21 and the keyboard 6 is opened by the second control structure 9 and the second valve 13 so that the heat is transmitted to the keyboard 6, as shown in Fig. 3.

    [0015] As shown in Fig. 2, the second control structure 9 may be extended out of the notebook computer 20 by about 0.5 cm to 2 cm (for example, 1 cm), so that the second control structure 9 can be rotated manually or electrically.

    [0016] In order to ensure the control of the second valve 13 by the second control structure 9, a configuration shown in Fig. 5 and Fig. 6 may be employed. In Fig. 5 and Fig. 6, the second control structure 9 includes a central shaft 11 and an outer wheel 12, the central shaft 11 is fixed on the second control structure 9, and the outer wheel 12 is fitted over the central shaft 11. Fixing elements capable of engaging with each other are provided on the outer wheel 12 and the central shaft 11, so that the central shaft 11 and the outer wheel 12 are capable of being fixed with each other as shown in Fig. 5. For example, the fixing elements may include a protrusion provided on the central shaft 11 and a groove provided on the outer wheel 12, and the protrusion and the groove are capable engaging with each other. Of course, the fixing elements may also include a protrusion provided on the outer wheel 12 and a groove provided on the central shaft 11, and the protrusion and the groove are capable of engaging with each other.

    [0017] The outer wheel 12 may be connected with a slide 15 extending out of the notebook computer 20. The outer wheel 12 is disengaged with the central shaft 11 when the slide 15 slides leftward, as shown in Fig. 6. In this case, the central shaft 11 rotates freely for the central shaft 11 and the outer wheel 12 are disengaged with each other, the second valve 13 naturally droops due to the gravity as long as no external forces are applied, and thereby the heat transmitting path between the heat dissipation component 21 and the keyboard 6 is closed. After the slide 15 is released, the outer wheel 12 is returned to fit over the central shaft 11 due to the push of the spring 14, and is engaged with the central shaft 11 again.

    [0018] In addition, after the outer wheel 12 and the central shaft 11 are disengaged with each other, the second control structure 9 may also be rotated manually so that the second valve 13 is opened with different angles (for example, 0 degree, 30 degrees, 60 degrees, 90 degrees and so on), as shown in Fig. 7. Thereafter, the slide 15 is released, the outer wheel 12 is returned to fit over the central shaft 11 due to the push of the spring 14, and is engaged with the central shaft 11 again. By controlling the second valve 13 to be opened with different angles, the opening of the heat transmitting path between the heat dissipation component 21 and the keyboard 6 can have different sizes are, and thereby the amount of the heat provided for the keyboard 6 can be controlled.

    [0019] It is also possible that the spring 14 is omitted, and the slide 15 is moved manually.

    [0020] In addition, the heat dissipation component 21 may also be provided with a first control structure 8 between the radiator 4 and the fan 5, so as to control the close or open of the heat transmitting path between the radiator 4 and the fan 5. For example, when the heat transmitting path between the heat dissipation component 21 and the keyboard 6 is opened, the first control structure 8 and a first valve connected to the first control structure 8 are controlled to close the heat transmitting path between the radiator 4 and the fan 5, so that the heat dissipation by the fan 5 is reduced and the heat is provided to the keyboard 6 as much as possible. On the other hand, when the heat transmitting path between the heat dissipation component 21 and the keyboard 6 is closed, the first control structure 8 and the first valve connected to the first control structure 8 are controlled to open the heat transmitting path between the radiator 4 and the fan 5, so that the heat is dissipated by the fan 5 as much as possible without the necessary to provide the heat to the keyboard 6.

    [0021] The configuration and operation principle of the first control structure 8 are same to those of the second control structure 9, and thus their detail descriptions are omitted here for simplicity.

    [0022] When the keyboard 6 is provided with heat dissipation holes 10, the diameter of each heat dissipation hole 10 may be 0.5 cm, as shown in Fig. 8. A filter may be further provided on each heat dissipation hole 10, so as to prevent dust from entering. In addition, the height of the chamber of the keyboard 6 may be set as 1.5 cm.

    [0023] The heat dissipation device according to the embodiments of the present invention changes the heat dissipation manner of the conventional notebook computer, and is capable of guiding the heat generated by the graphics card and the CPU to the keyboard, so that the heat generated in the notebook computer can be recycled effectively instead of being discharged directly and the waste of the heat energy can be avoided. Furthermore, the heat dissipation device according to the embodiments of the present invention is capable of taking full advantage of the heat generated by the notebook computer while increasing the heat dissipation, so that the case in which the hands of the on-site worker using the notebook computer outdoors are prone to be frozen stiff or even be frostbit can be avoided.

    [0024] The foregoing embodiments merely are exemplary embodiments of the invention, and not intended to define the scope of the invention which is determined by the appended claims.


    Claims

    1. A heat dissipation device, provided in a notebook computer (20) with a keyboard (6), wherein
    the heat dissipation device includes a heat dissipation component (21), a heat guiding box (7) and a heat guiding pipe (3), the heat dissipation component (21) is communicated with the heat guiding box (7), the keyboard (6) is also communicated with the heat guiding box (7), and the heat guiding box (7) is configured to transmit heat in the heat dissipation component (21) to the keyboard (6), characterized in that
    the heat dissipation component (21) includes a fan (5), and a radiator (4), wherein the heat guiding pipe (3) is configured to transmit heat generated in the notebook computer (20) to the heat dissipation component (21), and the fan (5) is configured to blow out the heat of the heat dissipation component (21) to the external environment through the radiator (4) or to the heat guiding box (7),
    the heat dissipation component (21) further includes a first valve provided between the radiator (4) and the fan (5), and the first valve is configured for closing a heat dissipation path between the heat dissipation component (21) and the external environment in the case that a temperature of the keyboard is needed to be increased and the first valve is configured for opening the heat dissipation path between the heat dissipation component (21) and the external environment in the case that the temperature of the keyboard is not needed to be increased, and
    the heat guiding box (7) includes a second valve (13) for closing or opening a heat transmitting path between the heat dissipation component (21) and the keyboard (6).
     
    2. The heat dissipation device according to claim 1, wherein the heat dissipation component (21) further includes a first control structure (8) which is rotatable, and the first control structure (8) is connected with the first valve to control the first valve.
     
    3. The heat dissipation device according to claim 2, wherein the first control structure (8) extends out of the notebook computer (20).
     
    4. The heat dissipation device according to claim 1, wherein the heat guiding box (7) further includes a second control structure (9) which is rotatable, the control structure (9) is connected with the second valve (13) to control the second valve (13).
     
    5. The heat dissipation device according to claim 4, wherein the second control structure (9) extends out of the notebook computer (20).
     
    6. The heat dissipation device according to claim 5, wherein the second control structure (9) includes a central shaft (11) and an outer wheel (12), the central shaft (11) is fixed on the control structure (9), the outer wheel (12) is fitted over the central shaft (11), and fixing elements are provided on the outer wheel (12) and the central shaft (11) so that the central shaft (11) and the outer wheel (12) are capable of being fixed with each other.
     
    7. The heat dissipation device according to claim 6, wherein the fixing elements include:

    a protrusion provided on the central shaft (11) and a groove provided on the outer wheel (12), the protrusion and the groove being capable of engaging with each other, or

    a protrusion provided on the outer wheel (12) and a groove provided on the central shaft (11), the protrusion and the groove being capable of engaging with each other.


     
    8. The heat dissipation device according to claim 6, wherein the outer wheel (12) is connected with a slide (15) extending out of the notebook computer (20).
     
    9. The heat dissipation device according to claim 1, wherein the keyboard (6) is further provided with a plurality of heat dissipation holes (10).
     
    10. The heat dissipation device according to claim 9, wherein each of the heat dissipation holes (10) has a circle shape, a rectangular shape, or a triangle shape.
     
    11. The heat dissipation device according to claim 1, wherein the heat guiding box (7) is provided at a lateral side of the keyboard (6).
     
    12. The heat dissipation device according to claim 1, wherein an inner wall of the heat guiding box (7) is coated with a heat insulating material.
     


    Ansprüche

    1. Wärmeableitungsvorrichtung in einem Notebook-Computer (20) mit einer Tastatur (6), wobei
    die Wärmeableitungsvorrichtung aufweist eine Wärmeableitungskomponente (21), eine Wärmeleitungsdose (7) und ein Wärmeleitungsrohr (3), wobei die Wärmeableitungskomponente (21) sich in Kommunikation mit der Wärmeleitungsdose (7) befindet, die Tastatur (6) sich ebenfalls in Kommunikation mit der Wärmeleitungsdose (7) befindet, und die Wärmeleitungsdose (7) konfiguriert ist, Wärme in der Wärmeableitungskomponente (21) zu der Tastatur (6) zu übertragen,
    dadurch gekennzeichnet, dass
    die Wärmeleitungskomponente (21) aufweist einen Lüfter (5), und einen Radiator (4), wobei das Wärmeleitungsrohr (3) konfiguriert ist, Wärme, die in dem Notebook-Computer (20) erzeugt wurde, zu der Wärmeableitungskomponente (21) zu übertragen, und der Lüfter (5) konfiguriert ist, die Wärme der Wärmeableitungskomponente (21) zu der äußeren Umgebung durch den Radiator (4) oder zu der Wärmeleitungsdose (7) auszublasen,
    die Wärmeableitungskomponente (21) weiter aufweist eine erste Klappe, die zwischen dem Radiator (4) und dem Lüfter (5) vorgesehen ist, und wobei die erste Klappe konfiguriert ist zum Schließen eines Wärmeableitungswegs zwischen der Wärmeableitungskomponente (21) und der äußeren Umgebung für den Fall, dass eine Temperatur der Tastatur erhöht werden soll, und wobei die erste Klappe konfiguriert ist zum Öffnen des Wärmeableitungswegs zwischen der Wärmeableitungskomponente (21) und der äußeren Umgebung für den Fall, dass die Temperatur der Tastatur nicht erhöht werden soll, und
    die Wärmeleitungsdose (7) aufweist eine zweite Klappe (13) zum Schließen oder Öffnen eines Wärmeübertragungswegs zwischen der Wärmeableitungskomponente (21) und der Tastatur (6).
     
    2. Wärmeableitungsvorrichtung gemäß Anspruch 1, wobei die Wärmeableitungskomponente (21) weiter aufweist eine erste Steueranordnung (8), die drehbar ist, und wobei die erste Steueranordnung (8) mit der ersten Klappe verbunden ist, um die erste Klappe zu steuern.
     
    3. Wärmeableitungsvorrichtung gemäß Anspruch 2, wobei die erste Steueranordnung (8) sich aus dem Notebook-Computer (20) heraus erstreckt.
     
    4. Wärmeableitungsvorrichtung gemäß Anspruch 1, wobei die Wärmeleitungsdose (7) weiter aufweist eine zweite Steueranordnung (9), die drehbar ist, wobei die Steueranordnung (9) mit der zweiten Klappe (13) verbunden ist, um die zweite Klappe (13) zu steuern.
     
    5. Wärmeableitungsvorrichtung gemäß Anspruch 4, wobei die zweite Steueranordnung (9) sich aus dem Notebook-Computer (20) heraus erstreckt.
     
    6. Wärmeableitungsvorrichtung gemäß Anspruch 5, wobei die zweite Steuerstruktur (9) aufweist eine Zentralwelle (11) und ein Außenrad (12), wobei die Zentralwelle (11) an der Steueranordnung (9) befestigt ist, wobei das Außenrad (12) an der Zentralwelle (11) montiert ist und Befestigungselemente an dem Außenrad (12) und der Zentralwelle (11) vorgesehen sind, sodass die Zentralwelle (11) und das Außenrad (12) aneinander befestigt werden können.
     
    7. Wärmeableitungsvorrichtung gemäß Anspruch 6, wobei die Befestigungselemente aufweisen:

    einen Vorsprung, der auf der Zentralwelle (11) vorgesehen ist und eine Nut, die an dem Außenrad (12) vorgesehen ist, wobei der Vorsprung und die Nut ineinander eingreifen können, oder

    einen Vorsprung, der an dem Außenrad (12) vorgesehen ist, und eine Nut, die an der Zentralwelle (11) vorgesehen ist, wobei der Vorsprung und die Nut ineinander eingreifen können.


     
    8. Wärmeableitungsvorrichtung gemäß Anspruch 6, wobei das Außenrad (12) mit einem Schieber (15) verbunden ist, der sich aus dem Notebook-Computer (20) herausstreckt.
     
    9. Wärmeableitungsvorrichtung gemäß Anspruch 1, wobei die Tastatur (6) weiter eine Vielzahl von Wärmeableitungslöchern (10) aufweist.
     
    10. Wärmeableitungsvorrichtung gemäß Anspruch 9, wobei jede der Wärmeableitungslöcher (10) eine Kreisform, eine Rechtecksform oder eine Dreiecksform aufweist.
     
    11. Wärmeableitungsvorrichtung gemäß Anspruch 1, wobei die Wärmeleitungsdose (7) an einer lateralen Seite der Tastatur (6) vorgesehen ist.
     
    12. Wärmeableitungsvorrichtung gemäß Anspruch 1, wobei eine Innenwand der Wärmeleitungsdose (7) mit einem Wärme-isolierenden Material beschichtet ist.
     


    Revendications

    1. Dispositif de dissipation de chaleur, prévu dans un ordinateur bloc-notes (20) avec un clavier (6), dans lequel :

    le dispositif de dissipation de chaleur comprend un composant de dissipation de chaleur (21), une boîte de guidage de chaleur (7) et un tuyau de guidage de chaleur (3), le composant de dissipation de chaleur (21) communique avec la boîte de guidage de chaleur (7), le clavier (6) communique également avec la boîte de guidage de chaleur (7), et la boîte de guidage de chaleur (7) est configurée pour transmettre la chaleur dans le composant de dissipation de chaleur (21) au clavier (6), caractérisé en ce que :

    le composant de dissipation de chaleur (21) comprend un ventilateur (5), et un radiateur (4), dans lequel le tuyau de guidage de chaleur (3) est configuré pour transmettre la chaleur générée dans l'ordinateur bloc-notes (20) au composant de dissipateur de chaleur (21), et le ventilateur (5) est configuré pour souffler la chaleur du composant de dissipation de chaleur (21) vers l'environnement extérieur par le biais du radiateur (4) ou de la boîte de guidage de chaleur (7),

    le composant de dissipation de chaleur (21) comprend en outre une première valve prévue entre le radiateur (4) et le ventilateur (5), et la première valve est configurée pour fermer une trajectoire de dissipation de chaleur entre le composant de dissipation de chaleur (21) et l'environnement extérieur dans le cas dans lequel une température du clavier nécessite d'être augmentée et la première valve est configurée pour ouvrir la trajectoire de dissipation de chaleur entre le composant de dissipation de chaleur (21) et l'environnement extérieur dans le cas dans lequel la température du clavier n'a pas besoin d'être augmentée, et

    la boîte de guidage de chaleur (7) comprend une seconde valve (13) pour fermer ou ouvrir une trajectoire de transmission de chaleur entre le composant de dissipation de chaleur (21) et le clavier (6).


     
    2. Dispositif de dissipation de chaleur selon la revendication 1, dans lequel le composant de dissipation de chaleur (21) comprend en outre une première structure de commande (8) qui peut tourner, et la première structure de commande (8) est raccordée avec la première valve pour commander la première valve.
     
    3. Dispositif de dissipation de chaleur selon la revendication 2, dans lequel la première structure de commande (8) s'étend hors de l'ordinateur bloc-notes (20).
     
    4. Dispositif de dissipation de chaleur selon la revendication 1, dans lequel la boîte de guidage de chaleur (7) comprend en outre une seconde structure de commande (9) qui peut tourner, la structure de commande (9) est raccordée avec la seconde valve (13) pour commander la seconde valve (13).
     
    5. Dispositif de dissipation de chaleur selon la revendication 4, dans lequel la seconde structure de commande (9) s'étend hors de l'ordinateur bloc-notes (20).
     
    6. Dispositif de dissipation de chaleur selon la revendication 5, dans lequel la seconde structure de commande (9) comprend un arbre central (11) et une roue externe (12), l'arbre central (11) est fixé sur la structure de commande (9), la roue externe (12) est montée sur l'arbre central (11) et des éléments de fixation sont prévus sur la roue externe (12) et l'arbre central (11) de sorte que l'arbre central (11) et la roue externe (12) peuvent être fixés entre eux.
     
    7. Dispositif de dissipation de chaleur selon la revendication 6, dans lequel les éléments de fixation comprennent :

    une saillie prévue sur l'arbre central (11) et une rainure prévue sur la roue externe (12), la saillie et la rainure pouvant se mettre en prise entre elles, ou bien

    une saillie prévue sur la roue externe (12) et une rainure prévue sur l'arbre central (11), la saillie et la rainure pouvant se mettre en prise entre elles.


     
    8. Dispositif de dissipation de chaleur selon la revendication 6, dans lequel la roue externe (12) est raccordée avec une glissière (15) s'étendant hors de l'ordinateur bloc-notes (20).
     
    9. Dispositif de dissipation de chaleur selon la revendication 1, dans lequel le clavier (6) est en outre prévu avec une pluralité de trous de dissipation de chaleur (10).
     
    10. Dispositif de dissipation de chaleur selon la revendication 9, dans lequel chacun des trous de dissipation de chaleur (10) a une forme circulaire, une forme rectangulaire ou une forme triangulaire.
     
    11. Dispositif de dissipation de chaleur selon la revendication 1, dans lequel la boîte de guidage de chaleur (7) est prévue au niveau d'un côté latéral du clavier (6).
     
    12. Dispositif de dissipation de chaleur selon la revendication 1, dans lequel une paroi interne de la boîte de guidage de chaleur (7) est recouverte avec un matériau thermiquement isolant.
     




    Drawing




















    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description