Patent Application
20190017302
The invention relates to an exterior door handle according to claim 1 for a vehicle, particularly for an activation of an electric lock of a vehicle. Further, the invention relates to a method according to claim 13 for a detection of an activation action at an exterior door handle of a vehicle.
From the state of the art it is known that exterior door handles of vehicles are used for activating an electric lock for the vehicle. The electric lock is for example an electrically actuatable door lock. The unlocking of a lock can for example be initiated by an identification device, which herefore for example for the authentification transmits a code to a safety system of the vehicle. It may be possible that an activation, like a wake up of the identification device and/or an unlocking or an opening of the lock only occurs with or after approaching of the user or a hand of the user, and/or an application of force by the user at a door handle body of the exterior door handle with or after a performed authentification. The approaching or application of force is detected by sensors of the exterior door handle.
It is turned out as a disadvantage that the detection by the sensors is often error-prone and/or susceptible to interferences. Thus, capacitive sensors can for example be used for the detection of the approaching wherein external influences like moisture or rain often lead to erroneous detections. Likewise, the sensitivity for the detection can be insufficient, whereby the comfort for the user is consequently diminished during the activation of the electric lock. Further, the arrangement of the corresponding sensors cannot be sufficiently adjusted to the given configuration of the door handle body. Hereby, further disadvantages concerning the comfort and increased space requirement result.
The invention has the object to at least partially avoid the previously described disadvantages. Particularly, it is object of the invention to detect an activation action of the user more reliably, more correctly and/or more comfortably.
The previous object is solved by an exterior door handle with the features of claim 1 and by a method with the features of claim 13. Further features and details of the invention result from the respective dependent claims, the description and the drawings. Thereby, features and details which are described in relation to the exterior door handle according to the invention naturally also apply in relation to the method according to the invention and vice versa such that according to the disclosure of the individual invention aspects it is or can always be reciprocally related to.
The object is particularly solved by an exterior door handle for a vehicle, particularly for an activation of an electric lock for a vehicle, wherein the exterior door handle preferably comprises a door handle body with a wall. Hereby, it is provided that the door handle body is configured such that an activation action by the user at the door handle body is performable in a deformation area.
Further, the exterior door handle preferably comprises:
The activation action particularly is an application of force (by the user) at the door handle body which preferably effects a deformation in the deformation area. The activation action thereby preferably occurs at an outer side (outer area) of the door handle body which is accordingly achievable by the user in the normal operation of the vehicle. The activation action can thereby for example serve for the manual opening and/or closing of a moveable part, wherein the movable part is preferably configured as a door and/or hatch flap of the vehicle. The vehicle preferably is a motor vehicle and/or passenger car and/or truck. Thereby, for example a draw movement and/or a pressing movement at the exterior door handle for the activation action occurs meaning particularly at the door handle body, for example by gripping the door handle body by the hand of the user. Herefore, the user for example grips in a grip recess which is configured between the door handle body and the moveable part. The exterior door handle and in particular the door handle body, is particularly configured such that the user grips behind the door handle body in the door handle recess for the actuation and preferably applies a force to the door handle body to perform the activation action. With a positive detection by the sensor device this effects the activation of the electric lock (and/or the activation of a safety device), for example the unlocking and/or locking and/or opening of the electric lock and/or a control of the drive, for example for unlocking or opening the door.
Further, it can be provided that the activation action by the user only is detectable in the deformation area by the sensor device. Hereby, the advantage is achieved that another action like an application of force at the door handle body is not erroneously interpreted as an activation action. It can also be provided that the door handle body, particularly the wall of the door handle body, is configured outside the deformation area mostly or completey rigid and/or with a lower elasticity in the deformation area.
The exterior door handle and particularly the door handle body can preferably be configured from plastic and/or at least mainly or partially comprise plastic. Further, the door handle body and/or the exterior door handle preferably comprise an (inner) space, at least partially enclosed by the wall, particularly a cavity, wherein the sensor device is preferably arranged within the door handle body meaning in this inner space. The sensor device thereby is preferably arranged completely with all sensors or sensor elements in the inner space of the door handle body. Likewise, an electronic system like the sensor device is thereby casted with a filling element (for example an elastic casting compound) in the inner space. The sensor device for example comprises at least one inductive sensor like an LDC-Sensor (Inductance-To-Digital-Converter or Inductivity-Digital-Converter). The sensor device thereby serves particularly for the (indirect) measurement of the deformation and/or pull movement of the exterior door handle due to the activation action. The activation action therewith provides a deformation action. The door handle body for example comprises a mechanic deformable wall in the deformation area, possibly with a material weakening like a recess and/or with elastically deformable cover parts to allow a deformation in the deformation area by the activation action. Due to the activation action which for example provides a loading of the door handle body like a pulling or pushing load preferably a maximum deformation of approximately 0.01 mm to 2 mm, preferably 0.1 mm to 1 mm, particularly preferred maximum approximately 0.1 mm occurs. The corresponding values can for example be digitally saved as a threshold value in a non-volatile data memory of the sensor device, wherein the threshold values can be read out by the sensor device and can be compared with the measured inductive values for the detection of the activation action. For the deformation, the metrical values are hereby for example transferred into inductivity values and saved as such as threshold value in order to enable a direct comparison through the sensor device with the measured inductivity values. The corresponding conversion factor depends on the geometry of the door handle body and/or the activation means in the deformation area and can for example be determined by experiments. The activation means is particularly arranged in the deformation area such that a deformation in the deformation area or the wall in the deformation area has a direct effect to the structure and/or geometry of the activation means and/or the distance of the activation means to the sensor device. Therewith, a reliable detection of the activation action can occur.
Within the scope of the invention it can further be an advantage that the exterior door handle is configured as a fixed exterior door handle and is particularly arranged immobile at the vehicle, particularly in a movable part of the vehicle. Alternatively, it is also possible that the exterior door handle is configured as a movable and particularly pivotably mounted exterior door handle. The exterior door handle as a fixed exterior door handle, preferably does not comprise any movable individual components like grope or suchlike which can for example serve for the detection of a force application. The term “movable” has thereby to be separated from the term “deformable” wherein particularly the deformation in contrast to the movement of the movable individual components occurs monolithically and/or as a length alteration and/or at the component made of one part, particularly the wall. For example, during groping, however, a relative movement between the separate individual components occurs. Therefore, the detection of the deformation due to the activation action particularly occurs touchless and/or immobile as inductivity measurement by the sensor device. The term “fixed exterior door handle” particularly also refers to the fact that the exterior door handle is not deflectable and/or pivotable relative to the movable part, particularly relative to a door and/or hatch flap. Thereby, an application of force for the activation of the electric lock or the activation action has to be performed only in a partial area configured as a deformation area of the door handle body and not the whole door handle body relative to the movable part. This has the advantage that a very comfortable and secure opening of the movable part and/or activation of the lock can occur.
Within the scope of the invention it can optionally be provided that the sensor device comprises at least one LDC sensor and/or is configured as a LDC sensor. The LDC sensor thereby serves for the detection of at least an alteration of an inductivity, meaning particularly for the inductivity measurement. Herefore, different components and/or circuits are normally necessary which are connected with a LDC sensor on a chip or in an integrated circuit. The LDC sensor and/or the sensor device is for example configured in order to measure the impedance and the resonance frequency of an LC pivoting circle at the same time. Hereby, the sensor device is preferably insensitive to outer influences like moisture or contamination in the area of the door handle body. Therefore, an error detection by influences like rain which leads to interferences with for example capacitive sensors can be reliably prevented. An error detection by outer influences which effect an application of force at the door handle body can for example be prevented that only a partial area of the door handle body comprises the deformation area and corresponding threshold values are used which are specific for the respective activation action. Thereby, the LDC sensor further has the advantages that it is very sensitive for deformations and can therewith serve particularly fast and reliably for the detection of the activation action. The sensor device has thereby for example a resolution of below 1 micrometer with for example a bit depth for quantizing the measured inductive values of at least 16 Bit or at the least 24 Bit.
It is further possible that within the door handle body, meaning in an inner space of the door handle body, at least two or at least three or at least four sensor devices are arranged, which are for example arranged spread along the inner side of the door handle body. Thereby, the sensor device or sensor devices can be at least arranged at a circuit board and/or electrical connected with an electronic (control) system in the inner space of the door handle body. The electronic system of the exterior door handle can for example be arranged on a circuit board together with a sensor device. The sensor device is preferably arranged on the side of the circuit board facing the deformation area. A further electronic system can be arranged on the same side or the side facing away. The sensor device can for example comprise at least an integrated circuit and/or at least a micro processor and/or at least a coil and/or at least a non-volatile Data memory. Thereby, the sensor devices can be resigned for example to different deformation areas of the door handle body respectively. Hereby, reliably one or multiple activation actions can be detected at different areas of the door handle body.
It is further possible that the activation means is configured as an electrically conducting film and/or conductive (printable) ink and/or an electrically conductive coating and or at least one electrically conducting element, particularly from metal, preferably elastically deformable and/or completely galvanically separated and particularly preferred arranged at the inner side of the door handle body and/or in a structural adjustment of the wall. The activation means is thereby preferably (for example only) arranged at the deformation area and particularly releasably or unreleasably arranged such that a deformation of the wall in the deformation area directly affects the activation means. The structural adjustment of the wall is for example a recess of the wall and particularly effects a material weakening of the wall in the deformation area. Thereby, the structural adjustment thereby comprises for example the complete vehicle related wall of the door handle body at the outer side and/or inner side at the door handle body. Alternatively, the structural adjustment comprises for example 1% to 80%, preferably maximum 30% to 50%, preferably 10% to 70% of the whole wall of the door handle body. The activation means is for example mainly arranged (this also means completely) at or in the (whole) structural adjustment, for example within the recess, and comprises for example 1% to 99%, preferably 30% to 50%, particularly preferred 10% to 70% of the structural adjustment. The activation means can preferably be arranged at the inner side or outer side at the wall in the area of the structural adjustment and/or the deformation area and/or at least partially within the wall. Thereby, the activation means preferably comprises metal and is particularly preferred configured as a metal element. Thus it is for example possible that the activation means is arranged as a metallic film or other electric conductive film in the inner side at the door handle body at the structural adjustment. Further, it can be possible that the activation means is configured as chromium coating of the wall in the detection area. The structural adjustment, particularly the recess, can thereby comprise an extension in the area of 500 mm2 to 20000 mm2, preferably mainly 1200 mm2. The activation means is preferably partly or completely electrically isolated meaning particularly galvanically separated and/or non-electrically connected with an electronic system and/or the sensor device. The activation means is therewith particularly galvanically separated from any electronic system and/or other electronic components or the sensor device and therewith preferably only an inductively used component. This has the advantage that the possibility of errors can be considerably reduced and therewith a reliable detection is possible.
It is further possible that at least a first deformation area with at least a first activation means is provided, particularly on the side facing the vehicle at the door handle body and at least a second deformation area with at least one second activation means, particularly on the side facing away from the vehicle at the door handle body. Further, it is possible that further deformation areas with further activation means are provided. Further, for example a first deformation area can be configured such that a tensile load of the first activation action and the second activation area are configured to exclude a compression load of a second activation action. The first deformation area and/or the first activation means can preferably be assigned to the first activation action and/or the second deformation area and/or the second activation means to the second activation action. Thereby, the first activation is for example a first function like the unlocking or opening of the electric lock and the second activation action a second function like the locking or closing of the lock. Therewith, the advantage is achieved that a flexible operation of the exterior door handle can occur.
Within the scope of the invention a further advantage is achievable when a first sensor device and a second sensor device are provided within the door handle body, wherein particularly the first sensor device is configured for the inductive measurement at the first deformation area and the second sensor device is configured for the inductivity measurement at the second deformation area. Likewise, the first sensor device can hereby be assigned to a first activation action with a first function and the second sensor device to a second activation action with the second function. The first activation action thereby comprises for example a tensile load and/or the second activation action comprises for example a tensile load at the door handle body. The first activation action preferably occurs in the first deformation area and the second activation action preferably occurs in the second deformation area. The first and second sensor device can for example be electrically connected to one another or independent from one another and/or configured galvanically separated from one another. Alternatively or additionally, it is possible that the second sensor device or a further sensor device is configured to take over the function of the first sensor device in case of an error of the first sensor device occurs and to survey the first activation means in the first deformation area. Hereby, an increased failure safety can be ensured.
Further, it can be provided that the wall in the deformation area of the door handle body comprises a structural adjustment, particularly a recess and/or a material weakening, wherein preferably the wall and/or the door handle body preferably only in the area of the structural adjustment and particularly due to the structural adjustment comprise for the detection with the sensor device sufficient elastic deformability which particularly is increased in comparison with the deformability of the areas of the door handle body adjacent to the deformation area. The deformation area is thereby for example provided centrally at the door handle body and/or is surrounded by the adjacent areas. The deformation area and/or the overall surface of all deformation areas thereby comprises for example at least 2% and/or at least 4% and/or at least 8% and/or at least 10% of the overall outer area of the door handle body. Thereby, it is possible that a first structural adjustment in a first deformation area and a second structural adjustment in a second deformation area is provided. Thereby, the structural adjustment preferably is a material weakening, particularly in form of a recess of the wall of the door handle body in the deformation area. Hereby, it can be ensured that a small deformation is metrologically detectable by the activation action at the door handle body by the sensor device. Thereby, the structural adjustment, particularly the recess, can preferably be arranged at the door handle body such that a deformation measureable by the sensor device upon gripping the door handle body with the hand of the user occurs by the performance of the activation action.
Within the scope of the invention a further advantage is achievable when the structural adjustment at the outer side at the door handle body, particularly at the wall in the deformation area, is configured. Thereby, it can be possible that the structural adjustment meaning, particularly the recess is configured explicitly visible from the outside by the user. This has the advantage that for the user the activation area for the performance of the activation action is shown in the deformation area. Alternatively or additionally, it is possible that the structural adjustment and/or a further (second) structural adjustment is only configured at the inner side of the door handle body. This leads to an externally visible, even and closed surface. Accordingly, it can be possible that the activation means is arranged at the inner side or outer side at the door handle body. Thereby, the activation means can be configured visible from the outside or in the inner space of the door handle body such that it is not recognizable from the outside by the user. Further, it is possible that the structural adjustment and/or the activation means is configured at the outer side (recognizable) and inner side (not recognizable) at the door handle body, particularly at the wall in the deformation area. Therewith, the detection can be further improved.
Within the scope of the invention it can further be provided that an average wall thickness of the wall outside the deformation area is at least 50% greater than in the deformation area, wherein preferably the average wall thickness of the wall in the deformation area (recess wall thickness), particularly the structural adjustment is in the area of 1 mm to 2 mm, preferably 1.3 mm to 1.7 mm and preferably amounts to at least mainly 1.5 mm. Further, it is possible that the wall thickness of the wall handle body in the deformation area is for example in the area of 1.4 mm to 1.5 mm and for example a maximum 40% or maximum 70% or maximum 80% or maximum 90% of the wall thickness of the door handle body outside the deformation area. The wall thickness of the wall handle body outside the deformation area meaning the normal wall thickness of the door handle body is for example in an area of 2 mm to 3 mm, preferably 2.2 mm to 4 mm, wherein the wall thickness amounts to particularly preferred mainly 2.5 mm or at least 2.4 mm. Therewith, it is ensured that only the activation action in the deformation area leads to a deformation detectable by the sensor device.
Within the scope of the invention it can further be an advantage that the distance between the sensor device and the activation means surveyed by the sensor device is in the area of 1 mm to 5 mm, particularly 2 mm to 3 mm. Thereby, the sensor device can for example measure deformations of approximately at least 1/10 mm, wherein with an exceeding of the determined threshold value an opening signal for opening the lock by the sensor device and/or a signal for the activation of a function of the vehicle is generated. The sensor device is, therefore, for example connected with a central electronic system of the vehicle and/or with a safety system of the vehicle. Particularly, the distance or the alteration of the distance between the sensor device and the activation means is thereby metrologically detected by the sensor device in order to enable a reliable detection of the activation action.
Within the scope of the invention it can further be an advantage that an area between the sensor device and the actuation means and preferably an inner space of the door handle body is at least partially filled with a filling element, particularly a casting compound. Thereby, the filling element is preferably arranged in the area of the distance between the sensor device and the activation means surveyed from the sensor device. The filling element, thereby, particularly serves for the sealing of moisture penetrating from outside the door handle body and can for example be configured as a filling pack and/or foam material and/or cast compounds.
Within the scope of the invention it can further be an advantage that the sensor system technology, particularly a capacitive sensor system with at least one sensoric element is provided within the door handle body (for example in the inner space/cavities). The sensor system thereby particularly serves for detecting an action, particularly an approaching at the exterior door handle, particularly at the door handle body in order to perform a positive detection of the corresponding action with a positive detection of the corresponding action function of the vehicle like for example a locking and/or unlocking of the electric lock and/or a central locking of the vehicle. Hereby, for example in case of a positive detection a corresponding control signal can be transmitted to a control unit of the vehicle and/or a safety system of the vehicle by the sensor system. Thereby, it can be possible that the function of the vehicle controlled by the sensor system differs from the function of the sensor system controlled by the sensor device. Thus, for example only by the sensor device (with the detection of the activation action) the function of the vehicle is controlled or affected that an unlocking and an opening of the electric lock occurs. Particularly, not only by the detection of the sensor system an opening can be effected. The unlocking of the lock thereby effects that the moveable part of the vehicle and/or the lock can be opened, while, with a locked lock, an activation of the exterior door handle is enabled, however the moveable part and/or the lock do not open. The opening of the electric lock has to be separated from the unlocking which effects a removing of a locking of the lock after unlocking. Hereby, a mechanically moveable door handle is for example moved mechanically in order to open the lock and/or the moveable part. With the electric lock the removing of the lock (the opening of the lock) occurs after an electric control (opening signal), wherein for example the rotary catch of the door lock by an electric controlling and possibly with a drive unit like a servo unit or a motor unit is actuated without the use of a force of application at the exterior door handle. The mechanic deflection or adjustment of the exterior door handle for opening is superfluous by such electric locks and the exterior door handle can therewith be arranged mainly immobile at the moveable part. The opening signal which is preferably send from the sensor device with the detection of the activation action effects therewith, particularly the opening of the electric lock such that the exterior door handle is only used immobily at the moveable part as the handle for opening the moveable part.
Likewise, subject matter of the invention is a method for a detection of an activation action at an exterior door handle of the vehicle, particularly for an activation of an electric lock of the vehicle. Hereby, it is provided that the activation action is performed by a user at the door handle body of the exterior door handle in a deformation area and a sensor device within the door handle body performs an inductivity measurement in order to detect the activation action. It is thereby particularly provided that by the inductivity measurement a deformation of the door handle body is detected with the activation action. Therewith, the method according to the invention provides the same advantages like they are described in detail in relation to the exterior door handle according to the invention. Further, the exterior door handle according to the invention can be used for the method according to the invention.
Further, according to the invention, preferably at least one of the following steps for the detection of the activation action and/or for the activation of a function of the vehicle are performed, particularly one after the other:
The function of the vehicle for example is an activation of the electric lock and/or the activation of a function of the safety system of the vehicle. The function can for example comprise the unlocking and/or opening of the electric lock and/or the moveable part, wherein for opening for example an opening signal by the sensor device during the detection of the activation action is emitted. For the detection of the activation action for example a certain and/or sufficient degree of deformation has to be existent which affects a correspondingly great inductivity alteration measureable by the sensor device. The indirect measurement of this deformation by the sensor device can for example occur by a determination of at least one corresponding threshold value which at least comprises one inductivity value which is at least measured during the appearance of the deformation. Therewith, a reliable detection of the activation action is possible.
According to a preferable embodiment of the invention it can be provided that the door handle body is configured elastically deformable in the deformation area and at least one inductive activation means is arranged in the deformation area, particularly in and/or at a wall of the door handle body, wherein the sensor device is arranged for detecting the activation action spaced apart to the activation means such that the deformation of the door handle body is recognized by the inductivity measurement. Since preferably the door handle body and particularly the wall of the door handle body can be configured at least mainly from plastic the activation means acts particularly as an electric conductor with a preferably defined geometry which comprises a reproducible and/or known alteration of the induction of the activation means during the deformation by the activation action. Therewith, by the inductivity measurement reliably an activation action can be detected by the surveillance of an alteration of the inductivity of the activation means.
According to an advantageous embodiment of the invention it can be provided that the sensor device, particularly only during the detection of the activation action transmits an opening signal, particularly to the electric lock of the vehicle, wherein the detection occurs particularly with the recognition of the deformation of approximately 0.05 mm to 0.2 mm, preferably 0.1 mm. Thereby, for example a threshold value of 0.5 mm or 0.1 mm or 0.2 mm (possibly converted as an inductivity value) can be determined, wherein with an exceeding of the threshold value by the measured inductivity value a positive detection of the activation action and therewith a triggering or provoking (activation) of a function of the vehicle occurs. Thereby, it can be provided that the particular electrically opening signal is only transmitted by the sensor device and therewith not by another sensor system of the vehicle and/or the exterior door handle. For example a capacitive sensor of the exterior door handle should not serve for the triggering of the opening signal and therewith to the triggering or provoking of an opening of the electric lock. Since this might lead to mal operation for example by outer influence factors. In contrary to such influence factors like for example moisture due to rain or an approaching of objects the method according to the invention is mainly not sensitive for the detection of the activation action with the sensor device.
It can be provided as a further advantage that a sensor system, particularly a capacitive sensor system is provided, wherein preferably the sensor system detects an approaching of the user, particularly previous to the detection of the activation action by the sensor device. Thereby, it can be provided that a locking and/or unlocking of the lock occurs by the sensor system. The sensor system can for example comprise at least one sensoric element for example in the inner space of the door handle body. Thus, it this for example possible that a locking of the lock occurs when the sensor system determines every moving of the user from the vehicle and/or from the exterior door handle. In contrast to that an unlocking of the lock can for example occur when the sensor system detects an approaching of the user. With the detected approaching the sensor system can for example initiate that a wake-up signal is sent to the identification device and it is waited for a response signal from the identification device. With a successful authentification due to the response signal then automatically the unlocking of the lock occurs. After a successful unlocking of the lock the sensor device can for example be used to detect an activation action in order to effect an opening of the lock. Therewith, it is possible that the detection of the activation device and/or the activation of a function of the vehicle for example the opening of the lock due to the detection of the activation action only occurs when previously a positive authentification and/or an unlocking of the lock has occurred. Further, it is possible that an opening signal is only evoked and/or an opening is only effected when the activation action is detected by the sensor device. The sensor system and/or the sensoric elements can for example be at least partially arranged adjacent to the sensor device, particularly be arranged on a common circuit board.
Likewise, a safety system for a vehicle is protected, particularly for an activation of an electric lock of the vehicle. The safety system according to the invention particularly comprises an exterior door handle according to the invention and/or the electric lock and/or an identification device and is preferably operable according to a method according to the invention.
Further advantages, features and details of the invention result from the subsequent description in which embodiments of the invention area described in detail in relation to the drawings. Thereby, the features described in the claims and in the drawings can be essential for the invention each single by themselves or in any combination. It is shown:
In the subsequent figures for the same technical features even in different embodiments the identic reference signs are used.
In
In
According
Further, it can be provided that the sensor device 30 is arranged on a circuit board and/or electrically connected with a further electronic system. The sensor device 30 is thereby arranged in a supporting device 32. The supporting device 32 is thereby configured such that the deformation in the deformation area 40 by the activation action is mainly not affecting the position of the sensor device 30 in the inner space 20.3. The deformation significantly and specifically affects the distance D between the sensor device 30 and the activation means 60 wherein the degree of deformation is measurable due to the distance D and/or the inductivity alteration.
Further, it is shown in
According to
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In
In
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In
The previous description of the embodiments describes the present invention only within the scope of examples. Naturally, single features of the embodiments as far as technical meaningful can be freely combined with one another without leaving the scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2015 111 311.2 | Jul 2015 | DE | national |
| 10 2015 118 523.7 | Oct 2015 | DE | national |
| 10 2015 118 525.3 | Oct 2015 | DE | national |
| EP15201091.4 | Dec 2015 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2016/065550 | 7/1/2016 | WO | 00 |
