• 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 coffee machine (1) comprises a grinder in turn comprising a rotating grinder and a fixed grinder separated by an interstice a hopper (6) having a discharge opening (10) for the coffee beans in said interstice, and a safety device oscillating fingers (100) supported inside the hopper (6) in a position to protect the discharge opening (10), as well as magnetic means for transforming the rotation of the rotating mill into the oscillation of the finger-saving device (100).
    公开号:CH710870B1
    申请号:CH00288/16
    申请日:2016-03-07
    公开日:2020-06-30
    发明作者:De' Longhi Giuseppe；Marcon Davide；Zaratin Enrico；Marcato Emanuele
    申请人:De Longhi Appliances Srl；
    IPC主号:
    专利说明:

    [0001] The present invention refers to a coffee machine equipped with a grinder. A known type grinder comprises a fixed grinder and a rotating grinder which delimit an adjustable interstice, and a hopper having an outlet for unloading the coffee beans into the interstice where the grinding takes place.
    [0002] In some known types of coffee machine, the hopper is internally equipped with a finger-saving device positioned to protect the unloading opening of the beans to prevent the user from inadvertently injuring himself with the cutting edges of the grinders.
    [0003] Also in these coffee machines there is a need to ensure the correct conveyance of the coffee beans present in the hopper towards the gap between the grinders of the grinder.
    [0004] In some cases the conveyance of the coffee beans is favored by the vibrations generated by the coffee machine during its normal operating cycle.
    [0005] In other cases, especially when the hopper is a separate component detachable from the body of the coffee machine, the extent of the vibrations transmitted to the hopper may not be sufficient to guarantee the correct descent of the coffee beans.
    [0006] To solve this problem, it has been proposed to increase the inclination of the hopper walls, but this solution implies an increase in its vertical dimensions and consequently in the overall vertical dimensions of the coffee machine for the same capacity of the hopper.
    [0007] However, the positioning space of the coffee machine often has well-defined height dimensions which can hinder or even prevent the installation of the coffee machine.
    [0008] In other cases, a finger protection device has been provided which is mounted oscillating in the hopper and equipped with special stirring members for the coffee beans. In such cases, the movement of the finger-saving device is determined by means of mechanical transmission of the rotation movement of the rotating grinder arranged through the discharge opening of the coffee beans. This type of solution is suitable almost exclusively for a construction of the coffee machine in which the extraction of the hopper is not foreseen and therefore an occlusion element of the discharge opening of the coffee beans is not provided either.
    [0009] The technical task proposed by the present invention is therefore to provide a coffee machine equipped with a grinder which allows to eliminate the technical drawbacks complained of by the known art.
    [0010] Within the scope of this technical task, an object of the invention is to provide a coffee machine equipped with a grinder which guarantees the correct feeding of coffee beans to the grinder. Another object of the invention is to provide a coffee machine equipped with a grinder which guarantees the correct feeding of coffee beans to the grinder regardless of the extent of the vibrations transmitted to the hopper by the coffee machine in its normal operating cycle.
    Not least object of the invention is to provide a coffee machine equipped with a grinder which has an effective system for conveying the coffee beans that can be implemented both for a removable hopper of the type that provides an occlusion element for the opening of unloading of coffee beans and for an integrated hopper in an indissoluble way in the body of the coffee machine.
    [0012] The technical task, as well as these and other objects, according to the present invention are achieved by realizing a coffee machine comprising a grinder in turn comprising a rotating grinder and a fixed grinder separated by an interstice, a hopper having a discharge opening of the coffee beans in said gap, and an oscillating finger-saving device supported inside said hopper in a protection position of said discharge opening, characterized in that it comprises magnetic means for transforming the rotation of said rotating mill into the oscillation of said device saves fingers.
    One of the advantages of the invention consists in the fact that the functionality of the finger-saving device is increased which, by oscillating, generates a mechanical stirring necessary for a correct descent of the coffee beans, but above all this system which assists the descent of the coffee beans can be implemented both in an inextricably integrated hopper in the body of the coffee machine and in a removable hopper as the magnetic transmission of the movement allows a clear mechanical separation between the components integral with the finger-saving device and the components integral with the rotating grinder.
    [0014] Further characteristics and advantages of the invention will become clearer from the description of a preferred but not exclusive embodiment of the coffee machine equipped with a grinder according to the invention, illustrated only by way of non-limitative example in the accompanying drawing, wherein:<tb> <SEP> figure 1 shows a perspective view of the hopper with the finger-saving device illustrated in an exploded configuration and removed from the hopper;<tb> <SEP> figure 2 shows the hopper mounted in the coffee machine;<tb> <SEP> figure 3 shows a section of the hopper in correspondence of the finger-saving device;<tb> <SEP> figure 4 schematically shows the trajectory of the two permanent magnets interacting to generate the oscillation of the finger-saving device.
    [0015] With reference to the aforementioned figures, a coffee machine 1 equipped with a grinder 2 is shown.
    [0016] The grinder 2 comprises in a known way a rotating grinder 30 and a fixed grinder 31 delimiting an interstice 5 where the grinding is carried out, a hopper 6 placed above the interstice 5 and having an unloading opening 10 of the grains of coffee in the interstice 5, and an oscillating finger-saving device 100 supported inside the hopper 6 in a position to protect the discharge opening 10.
    [0017] Advantageously, the coffee machine 1 comprises magnetic means for transforming the rotation of the rotating mill in the oscillation of the finger-saving device 100.
    The magnetic means comprise a first magnet 101 and a second magnet 102 interacting with each other.
    [0019] At least one of the first and second magnets 101, 102 is a permanent magnet, the other being in turn a permanent magnet or a ferromagnet.
    Preferably both the first magnet 101 and the second magnet 102 are permanent magnets.
    [0021] Below we will therefore refer to the case in which both the first magnet 101 and the second magnet 102 are permanent magnets.
    [0022] The first magnet 101 is integral with the rotating mill and the second magnet 102 is integral with the finger-saving device 100.
    [0023] The rotating mill has a rotation shaft 103 having an end 112 arranged in a position facing the discharge opening 10.
    [0024] The first magnet 101 is supported at the end 112 of the rotation shaft 103 and is arranged in a position radially offset from the geometric axis 104 of rotation of the rotating mill. In practice, due to a 360 ° rotation of the rotating mill around its geometric axis of rotation 104, the first magnet 101 moves along an entire circumference 120 centered on the geometric axis of rotation 104 of the rotating mill.
    The finger guard device 100 is supported by an oscillation pin 105 defining for the finger guard device 100 a geometric oscillation axis 106 offset by the geometric rotation axis 104 of the rotating mill.
    [0026] The swing pin 105 is made integrally with the body of the hopper 6.
    The finger-saving device 100 is more precisely supported by means of a bush 111 mounted on the swing pin 105.
    The bush 111 is made integrally with the body of the finger-saving device 100.
    The finger-saving device 100 also has a protrusion 107 having an end 113 arranged at the discharge opening 10.
    [0030] The second magnet 102 is supported at the end 113 of the protrusion 107 and is arranged in a position radially offset from the geometric axis 106 of oscillation of the finger-saving device 100.
    [0031] The second magnet 102 is therefore arranged to move along an arc of circumference 121 centered on the geometric axis of oscillation 106 of the finger-saving device 100.
    [0032] The geometric oscillation axis 106 of the finger-saving device 100 and the geometric rotation axis 104 of the rotating mill 3 are parallel: the first magnet 101 and the second magnet 102 therefore move in planes which are in turn parallel, and precisely the first magnet 101 in a movement plane lower than the movement plane of the second magnet 102.
    [0033] The first permanent magnet 101 is configured with a magnetic axis 114 parallel to the geometric axis of rotation 104 of the rotating mill 3 and the second permanent magnet 102 is configured with a magnetic axis 115 parallel to the geometric axis of oscillation 106 of the device save fingers 100.
    The first permanent magnet 101 also has the upper magnetic pole of opposite sign to the sign of the lower magnetic pole of the overlying second permanent magnet 102.
    [0035] The arrangement of the first and second magnets 101, 102 is such that at a point along their path they face each other with their magnetic poles of opposite sign and with their magnetic axes 114, 115 positioned coaxially.
    [0036] The coffee machine 1 has means for limiting the oscillation of the finger-saving device 100.
    The limiting means comprise a fin 109 which extends from the swing pin 105 and engages with a certain play in a slot 110 of the bush 111.
    The flap 109 has a flat configuration and is oriented in a plane containing the geometric oscillation axis 106 of the finger-saving device 100.
    [0039] In particular, the flap 109 is integrally made to the body of the hopper 6.
    The slot 110 has a straight longitudinal development in a direction parallel to the axis of the bush 111 and a calibrated width greater than the thickness of the flap 109.
    [0041] The hopper 6 supports on its external side an occlusion element 11 of the discharge opening 10 movable between an open position and a closed position.
    [0042] The occlusion element 11 is necessarily provided only when the hopper 6, as in the case illustrated by way of example, is of the extractable type.
    [0043] In this case the finger-saving device 100 is constrained to the oscillation pin 105 in a movable way in the direction of its geometric axis of oscillation 106, and the occlusion element 11 has, from the side facing the discharge opening 10 , a cam surface 108 cooperating with the end 113 of the protrusion 107 to move the finger protection device 100 in the direction of its geometric axis of oscillation 106.
    [0044] This translation constraint is defined by a slide 116 obtained on the internal side of the bush 111 and slidably engaged in a guide 117 obtained on the external side of the oscillation pin 105.
    [0045] The travel of translation of the slide 116 is delimited by a ring 118 fixed by a screw 119 to the end of the swing pin 105 and interacting with a shoulder 120 of the slide 116.
    [0046] In essence, during the opening movement of the occlusion element 11 the support of the end 113 of the protrusion 107 loses the cam surface 108 and the finger protection device 100 lowers slightly by positioning the magnet 102 at the opening discharge 10 and therefore at the minimum distance from the first magnet 101 so as to maximize the magnitude of the magnetic interaction between the first magnet 101 and the second magnet 102.
    On the contrary, during the closing movement of the occlusion element 11, the end 113 of the protrusion 107, which is precisely on the path of the occlusion element 11, is intercepted by the cam surface 108 which slightly raises the device finger guard 100 so as to allow correct completion of the closure of the discharge opening 10.
    The operation of the finger-saving device 100 briefly is as follows.
    [0049] When the user selects a type of coffee, the controller of the coffee machine 1 activates the rotating grinder for a specified time.
    [0050] We assume an initial reference configuration in which the longitudinal edges of the slot 110 are angularly equidistant from the flap 109 and the first magnet 101 and the second magnet 102 are arranged with their magnetic axes positioned coaxially.
    [0051] At the beginning of the rotation of the rotation shaft of the rotating mill, for example in the counterclockwise direction shown in the figures, the first magnet 101 is so close to the second magnet 102 to generate on it a magnetic force sufficient to drag the device finger guard 100 in clockwise rotation until a longitudinal edge of the slot 110 is intercepted on one side of the flap 109. At this point the finger guard 100 remains locked in the position achieved but the rotation of the rotation shaft of the rotating mill continues until the first magnet 101 approaches the second magnet 102 so as to generate on it a magnetic force sufficient to drag the finger-saving device 100 in rotation this time counterclockwise until the other longitudinal edge of the slot 110 is intercepted by the other side of flap 109.
    [0052] As the rotation of the rotating shaft of the rotating mill proceeds, a repeated oscillation of the finger-saving device 100 is created.
    [0053] The oscillation angle of the finger guard device 100 can be calibrated simply by changing the width of the slot 110.
    [0054] The protrusion 107 oscillating integrally with the finger-saving device 100 mechanically agitates the coffee beans which are correctly conveyed towards the discharge opening 10.
    [0055] The coffee machine thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept; moreover, all the details can be replaced by technically equivalent elements.
    [0056] In practice, the materials used, as well as the dimensions, may be any according to the requirements and the state of the art.
    权利要求:
    Claims (15)
    [1]
    1. Coffee machine (1) comprising a grinder in turn comprising a rotating grinder (30) and a fixed grinder (31) separated by an interstice (5), a hopper (6) having a discharge opening (10) of the coffee beans in said gap (5), and an oscillating finger-saving device (100) supported inside said hopper (6) in a protection position of said discharge opening (10), characterized in that it comprises magnetic means of transformation of the rotation of said rotating mill (3) into the oscillation of said finger-saving device (100).
    [2]
    Coffee machine (1) according to the preceding claim, characterized in that said magnetic means comprise a first magnet (101) and a second magnet (102) interacting with each other, at least one between said first and second magnet (101, 102) being a permanent magnet.
    [3]
    Coffee machine (1) according to the preceding claim, characterized in that said first magnet (101) is integral with said rotating grinder (3) and said second magnet (102) is integral with said finger protection device (100).
    [4]
    Coffee machine (1) according to claim 2 or 3, characterized in that said first magnet (101) is supported at one end of a rotation shaft (103) of said rotating mill, which end is arranged in a position facing said discharge opening (10), said first magnet (101) being arranged in a position radially offset by the geometric axis (104) of rotation of said rotating mill (3) so as to describe a circumferential trajectory around said geometric axis (104) of rotation of said rotating mill (3).
    [5]
    Coffee machine (1) according to one of claims from 2 to 4, characterized in that said finger-saving device (100) is supported by an oscillation pin (105) defining for the finger-saving device (100) a geometric swing axis (106) offset from the geometric rotation axis (104) of the rotating mill.
    [6]
    Coffee machine (1) according to the preceding claim, characterized in that said geometric oscillation axis (106) of the finger-saving device (100) and said geometric rotation axis (104) of the rotating mill are parallel.
    [7]
    Coffee machine (1) according to one of claims 2 to 6, characterized in that said second magnet (102) is arranged in a position radially offset from the geometric axis (106) of oscillation of said finger-saving device (100) .
    [8]
    Coffee machine (1) according to the preceding claim, characterized in that said second magnet (102) is supported at one end of a protrusion (107) of said finger-saving device (100) arranged in a position facing said discharge opening (10).
    [9]
    Coffee machine (1) according to one of claims 2 to 8, characterized in that said first magnet (101) and said second magnet (102) respectively are permanent magnets each having a magnetic axis parallel to the geometric rotation axis (104) of the rotating mill and respectively at the geometric oscillation axis (106) of the finger-saving device (100).
    [10]
    Coffee machine (1) according to the preceding claim, characterized in that, being said first and second permanent magnets (101, 102) movable along a path, in a position along their path they face each other with magnetic poles of opposite sign and with their magnetic axes positioned coaxially.
    [11]
    Coffee machine (1) according to one of claims 1 to 10 characterized in that it has means for limiting the oscillation of said finger-saving device (100).
    [12]
    Coffee machine (1) according to claim 11, characterized in that said finger-saving device (100) has a bush (111) mounted on said oscillation pin (105), and in that said limiting means comprise a flap (109) which extends from said pivot pin (105) and engages with a certain play in a slot (110) of said bush (111).
    [13]
    Coffee machine (1) according to one of the preceding claims, characterized in that it has an occlusion element (11) of the discharge opening (10) movable between an open position and a closed position.
    [14]
    Coffee machine (1) according to one of claims 5 to 13, characterized in that said finger protection device (100) is supported by said oscillation pin (105) in a movable way in the direction of its geometric axis of oscillation ( 106).
    [15]
    Coffee machine (1) according to the preceding claim, characterized in that said occlusion element (11) has a cam surface (108) cooperating with said end of said protrusion (107) to move said finger-saving device (100 ) in the direction of said geometric oscillation axis (106).
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    同族专利:
    公开号 | 公开日
    CH710870A2|2016-09-15|
    DE102016203811A1|2016-09-15|
    ITMI20150352A1|2016-09-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP3954258A1|2020-08-12|2022-02-16|BSH Hausgeräte GmbH|Automatic coffee machine having a grinder with a safety element|
    法律状态:
    2017-01-31| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: VIA ARIOSTO 6, 6901 LUGANO (CH) |
    优先权:
    申请号 | 申请日 | 专利标题
    ITMI2015A000352A|ITMI20150352A1|2015-03-09|2015-03-09|COFFEE MACHINE INCLUDING A GRINDER WITH HOPPER EQUIPPED WITH A FINGER-SAVING DEVICE|
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