Head-up display unit with at least one fastening element, arrangement and motor vehicle

Description

[0001] The invention relates to a head-up display unit with at least one fastening element for fastening the head-up display unit to at least one motor vehicle part of a motor vehicle. The head-up display unit comprises a housing and an image generator, and the at least one fastening element is connected to the housing. The invention also relates to an arrangement with a head-up display unit and a motor vehicle with such an arrangement.

[0002] Head-up display units for motor vehicles are known from the prior art.

[0003] The head-up display (HUD) is a display system that allows the user to maintain their head position or line of sight because the information is projected into their field of vision.

[0004] For example, head-up display units according to the preamble of the independent claims are disclosed on the Internet, such as: Photo of a BMW 62309262179 Head-Up Display, found on the Internet: URL: https: / / images.cdnrrr.com / / bos / 0 / 0 / 0 / 0 / 2 / 9 / 4 / 5 / 2 / 43fa63bbbba59d129a879dc02ac47415-bmw-x5-e 70- head-up-ekranas-displejus.jpg, [found on 2021-10-06], or BMW 62309262179 Head-Up Display, found on the Internet: URL: https: / / www.bmwpartsdeal.com / parts / bmw- head_up_display-62309262179.html, [found on 2021-10-06].

[0005] EP 1 972 483 B1 discloses a head-up display unit which is thermally coupled to a supporting structure of a vehicle by at least one of its components.

[0006] Head-up display units are typically attached to a component of the vehicle with clamps or clips. The disadvantage of this is that vibrations from the component can be transmitted to the head-up display unit.

[0007] It is an object of the invention to provide an arrangement and a motor vehicle in which the head-up display unit can be attached to the motor vehicle part with less vibration.

[0008] This object is achieved according to the invention by an arrangement and by a motor vehicle having the features according to the respective independent claims.

[0009] An arrangement according to the invention with a head-up display unit has at least one fastening element for fastening the head-up display unit to at least one motor vehicle part of a motor vehicle. The head-up display unit comprises a housing and an image sensor. The at least one fastening element is connected to the housing. An essential concept of the invention is that the at least one fastening element is designed for vibration-decoupled fastening of the head-up display unit to a first motor vehicle.

[0010] The fastening element allows the head-up display unit to be attached to the first motor vehicle part in a vibration-decoupled and / or noise-decoupled manner. Elastic receiving elements prevent vibrations or oscillations from being transmitted from the first motor vehicle part to the head-up display unit. The fastening element is preferably nipple-shaped and, due to its elasticity, can be positively received in a corresponding part of the receiving element of the first motor vehicle part. Due to the pin shape or nipple shape, the fastening element can be pressed into the receiving element during assembly after overcoming an initial resistance, where it provides the vibration-decoupled attachment. The fastening element can alternatively be designed as a screw, pin, or clip.

[0011] According to the invention, the fastening element is rigid, in particular made of plastic or steel, and is designed to engage with an elastic receiving element external to the display unit to form the vibration-decoupled fastening. The vibration-decoupled fastening is thus provided in particular by an interaction between the fastening element and the receiving element. The receiving element can be provided, for example, by an elastomer. Because the fastening element is rigid, the fastening element can be easily pressed into the receiving element during assembly. The receiving element can also be designed as an at least partially flat and elastic support element which, in the assembled state, is located between the head-up display unit and the motor vehicle part.The receiving element can also be designed as a circumferential elastic seal which, when installed, is located between the head-open display unit and the motor vehicle part.

[0012] Furthermore, it is preferably provided that the fastening element is designed to fasten the housing of the head-up display unit to the first motor vehicle part, which is designed as a dashboard. Thus, the fastening element is designed to fasten the head-up display unit to the dashboard. This is advantageous because vibrations of the motor vehicle are absorbed, in particular, by the dashboard and transmitted to attached components. The fastening element allows the head-up display unit to be attached to the vibrating dashboard in a vibration-decoupled manner.

[0013] In particular, it is provided that at least one centering element is arranged on the housing for aligning the housing to the first motor vehicle part. In particular, the at least one centering element comprises a first centering element and a second centering element. During assembly, the head-up display unit can thus initially be secured with the first centering element in such a way that ultimately only a rotational movement about the first centering element is possible. If, with correct alignment of the head-up display unit, the second centering element also engages in a centering opening in the first motor vehicle part, the head-up display unit is aligned with respect to the first motor vehicle part in such a way that the fastening element can be pressed into the receiving element. The at least one centering element therefore simplifies the assembly of the head-up display unit to the first motor vehicle part.

[0014] Furthermore, it is particularly provided that the at least one centering element is an assembly aid and is designed to be ahead of the fastening element. This means in particular that the at least one centering element is used for mounting the head-up display unit and, in the later mounted state, no longer needs to be connected to the first motor vehicle part. Furthermore, the at least one centering element is designed to be ahead of the fastening element, which means that the at least one centering element is longer and thus protrudes further from the housing than the fastening element. Thus, when the head-up display unit is inserted into the first motor vehicle part, the at least one centering element first touches the first motor vehicle part before the fastening element touches the first motor vehicle part. The centering element enables the head-up display unit to be mounted quickly and safely.

[0015] Furthermore, it is preferably provided that the head-up display unit is designed with a further fastening element for fastening to a second motor vehicle part of the motor vehicle, wherein the further fastening element is designed to adjust the position of the head-up display unit in two spatial directions relative to the second motor vehicle part. The further fastening element can, for example, be designed to substantially absorb the weight of the head-up display unit. Furthermore, the further fastening element can provide a play-compensating function with which the head-up display unit can be aligned in the two spatial directions relative to the second motor vehicle part. Thus, during assembly of the head-up display unit, the position relative to the two spatial directions relative to the second motor vehicle part can be adjusted. The second motor vehicle part can, for example, be designed as a cross member of the motor vehicle.

[0016] The invention relates to an arrangement with at least a first motor vehicle part of a motor vehicle and a head-up display unit according to the invention.

[0017] In particular, it is provided that the first motor vehicle part is designed as a dashboard of the motor vehicle. Oscillations or vibrations of the motor vehicle can be transmitted from the dashboard to the head-up display unit if the latter is not mounted in a vibration-isolated manner. Arranging the head-up display unit on the dashboard is advantageous because this allows an eyebox or a display zone of the head-up display unit to be precisely aligned with the eyes of a user of the head-up display unit.

[0018] Furthermore, according to the claimed invention, it is provided that the first motor vehicle part is designed with at least one receiving element for receiving a fastening element of the head-up display unit. The receiving element is the counterpart of the fastening element for the vibration-decoupled fastening. The fastening element can thus be pressed into the receiving element during assembly to provide the vibration-decoupled fastening. The first motor vehicle part therefore has, in particular, a plurality of receiving elements for receiving, in particular, one fastening element each of the head-up display unit. The head-up display unit can thus be fastened to the first motor vehicle part at several locations in a vibration-decoupled manner.

[0019] Furthermore, according to the claimed invention, it is provided that the at least one receiving element is at least partially elastic, in particular made of an elastomer. Due to the at least partially elastic design of the receiving element, the vibration-decoupled fastening of the head-up display unit can be carried out more effectively. As a result, the fastening element itself can be rigid, for example, because the vibration from the first motor vehicle part is absorbed by the receiving element and, due to the partially elastic design, is not transmitted to the fastening element and thus to the head-up display unit. The partially elastic design of the receiving element is provided in particular by the elastomer. An advantage of the elastomer is the elastic property of the receiving element that is reliably provided as a result.

[0020] Preferably, the at least one receiving element is arranged in a support surface formed on an upper side of the first motor vehicle part and recessed with respect to a main surface of the first motor vehicle part, said support surface surrounding an opening in the first motor vehicle part for the insertion of the head-up display unit. The upper side of the first motor vehicle part is therefore described in particular as the upper side of the dashboard of the motor vehicle. When the dashboard is installed, the upper side of the dashboard is oriented towards the interior of the motor vehicle. During installation, the head-up display unit is inserted through the opening and finally arranged in the recessed support surface.The receiving elements are preferably arranged in the recessed support surface in order to enable a flush and / or level transition from the dashboard to the housing of the head-up display unit when the head-up display unit is installed. The receiving elements preferably protrude and are therefore not flush with the recessed support surface. This makes the vibration-decoupled fastening of the head-up display unit even more reliable. The head-up display unit therefore does not rest directly on the first motor vehicle part, but only via the receiving elements. The recessed support surface therefore creates, in particular, a negative pedestal. The recessed support surface surrounds or frames the opening into which the head-up display unit is inserted during installation.

[0021] Furthermore, it is preferably provided that the first motor vehicle part is formed with at least one centering opening corresponding to a centering element of the head-up display unit for aligning the head-up display unit with respect to the first motor vehicle part when coupling the centering element to the centering opening. The at least one centering opening describes, in particular, a first centering opening for receiving a first centering element and a second centering opening for receiving a second centering element. The first centering opening can, for example, be formed as a round hole, while the second centering opening is formed as an elongated hole. The elongated hole of the second centering opening can, for example, compensate for manufacturing inaccuracies of the first motor vehicle part and / or the head-up display unit.For example, the first centering element is inserted into the first centering opening, thereby defining its degrees of freedom except for the rotational movement around the first centering element. The rotational movement is then continued until the second centering element engages the second centering opening. Once the centering elements have engaged the respective centering openings, the fastening element can then be pressed into the receiving element to provide the vibration-decoupled fastening.

[0022] Preferably, the head-up display unit is fastened to a second motor vehicle part, in particular one designed as a cross member, by means of a further fastening element of the head-up display unit. By fastening the head-up display unit to the second motor vehicle part by means of the further fastening element, in particular a significant portion of the weight of the head-up display unit can be absorbed or carried by the second motor vehicle part. The cross member thus represents a stable option for securely fastening the head-up display unit. The further fastening element, in particular, enables the head-up display unit to be mounted on the second motor vehicle part in a way that compensates for play. In this way, tolerances between the further fastening element and the second motor vehicle part can be compensated for by the further fastening element.The tolerances can be present, for example, by positionally fixing the head-up display unit by means of the fastening element and the first motor vehicle part.

[0023] Furthermore, it is preferably provided that the second motor vehicle part is designed with a further, in particular L-shaped, receiving element for receiving the further fastening element, and that the further receiving element has an elongated hole, in particular open at the edge, for vertically adjusting the position of the head-up display unit with respect to the second motor vehicle part. The further receiving element allows the further fastening element to be connected to the second motor vehicle part more reliably and easily. Due to the particularly L-shaped design of the further receiving element, the further fastening element can be easily pushed onto or inserted into the further receiving element during assembly. Due to the L-shaped design of the further receiving element, the elongated hole, which is in particular open at the edge, is designed with the open side facing the head-up display unit.Thus, the mounting direction of the head-up display unit can be adjusted more easily and reliably due to the alignment of the additional mounting element provided by the L-shaped design. The elongated hole allows the vertical position of the head-up display unit, i.e., how deep the head-up display unit extends into the second vehicle part, to be adjusted. The horizontal position of the head-up display unit relative to the cross member can be provided by the additional fastening element itself.

[0024] A motor vehicle according to the invention comprises an arrangement according to the invention. The motor vehicle can, for example, also comprise several of the arrangements according to the invention.

[0025] The terms "top", "bottom", "front", "back", "horizontal", "vertical" etc. indicate the positions and orientations given when the head-up display unit is used and arranged as intended and when an observer is standing in front of the head-up display unit and looking in the direction of the head-up display unit.

[0026] Further features of the invention emerge from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective combination specified, but also in other combinations or on their own, without departing from the scope of the invention. Thus, embodiments are also to be considered encompassed and disclosed by the invention that are not explicitly shown and explained in the figures, but which emerge and can be produced through separate combinations of features from the explained embodiments.

[0027] The embodiments of the invention are explained in more detail below using schematic drawings.

[0028] Showing: Fig. 1 is a schematic representation of a motor vehicle according to the invention with an arrangement; Fig. 2 is a schematic representation of a head-up display unit of the arrangement according to the invention; Fig. 3 is a schematic representation of the arrangement in an unassembled state with the head-up display unit, a first motor vehicle part of the motor vehicle and a second motor vehicle part of the motor vehicle; Fig. 4 is a further schematic representation of the arrangement in an unassembled state; Fig. 5 is a schematic representation of the arrangement in an assembled state; Fig. 6 is a schematic representation of a first fastening element of the head-up display unit and a first receiving element of the first motor vehicle part; and Fig. 7 is a schematic representation of a second fastening element of the head-up display unit for fastening to the second motor vehicle part.

[0029] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0030] In Fig. 1 A schematic plan view of a motor vehicle 1 with an arrangement 2 is shown. The arrangement 2 comprises a head-up display unit 3, a first motor vehicle part 4, and a second motor vehicle part 5. According to the exemplary embodiment, the head-up display unit 3 is mounted in the field of vision of a driver (not shown in detail) of the motor vehicle 1. However, mounting is possible in many ways, but preferably such that the head-up display unit 3 is fastened to the first motor vehicle part 4 and / or the second motor vehicle part 5.

[0031] The first motor vehicle part 4 is designed in particular as a dashboard or instrument panel. The second motor vehicle part 5 is designed in particular as a cross member of the motor vehicle 1. Both the first motor vehicle part 4 and the second motor vehicle part 5 are according to Fig. 1 are only shown schematically and do not have to extend completely from one side of the motor vehicle 1 to the other side of the motor vehicle 1.

[0032] Fig. 2 shows the head-up display unit 3. The head-up display unit 3 comprises a housing 6 and an image generator 7 arranged within the housing 6. According to the exemplary embodiment, a fastening element, which is referred to as the first fastening element 8 in the exemplary embodiment, is arranged four times on the housing 6 of the head-up display unit 3. In the side view of the head-up display unit 3 according to Fig. 2 only two of the first fastening elements 8 are visible. The respective first fastening element 8 is peg-shaped and serves for the vibration-decoupled fastening of the head-up display unit 3 to the first motor vehicle part 4. For this purpose, the respective first fastening element 8 is rigid, for example made of plastic or steel. A head of the first fastening element 8 is rounded and designed to engage in an elastic receiving element external to the display unit in order to form a vibration-decoupled fastening. The respective first fastening element 8 can be arranged in many different ways on the housing 6 of the head-up display unit 3. Preferably, the respective first fastening elements 8 are arranged symmetrically to one another on the housing 6. For example, a number of first fastening elements 8 other than four can also be arranged on the housing 6.

[0033] Furthermore, the head-up display unit 3 has a first centering element 9 and a second centering element 10.

[0034] For further description, the head-up display unit 3 is described with a coordinate system 11. The coordinate system 11 extends in a vertical direction of the head-up display unit 3 with a z-axis 12 and in a depth direction of the head-up display unit 3 with a y-axis 13. Thus, the respective first fastening elements 8, the first centering element 9 and the second centering element 10 extend in the negative direction of the z-axis 12. In particular, the centering elements 9, 10 extend further or deeper in the negative direction of the z-axis 12 than the respective first fastening elements 8. The centering elements 9, 10 are therefore designed to lead the way with respect to the first fastening elements 8.

[0035] Extending in the negative direction of the y-axis 13 is a further fastening element, which in the exemplary embodiment is referred to as the second fastening element 14. The second fastening element 14 is formed in two parts and has a screw 15 and a nut 16. The nut 16 can be used to compensate for play when fastening the head-up display unit 3 to the second motor vehicle part 5. The nut 16 has an external thread with which the second fastening element 14 is screwed into a thread of the housing 6. In addition, the nut 16 has an internal thread into which the screw 15 is screwed.

[0036] Fig. 3 shows the arrangement 2. According to the illustration of Fig. 3 An assembly process of the arrangement 2 is shown. The head-up display unit 3 is inserted into an opening 17 of the first motor vehicle part 4.

[0037] The first motor vehicle part 4 has four receiving elements, which in the exemplary embodiment are referred to as first receiving elements 18. The first receiving elements 18 are arranged on a recessed support surface 19 of the first motor vehicle part 4. The recessed support surface 19 is arranged on an upper side 20 of the first motor vehicle part 4. With respect to a main surface 21 of the upper side 20 of the first motor vehicle part 4, the recessed support surface 19 is arranged deeper. The recessed support surface 19 is arranged in particular so deep that a height of a housing edge 22 of the housing 6 is arranged by the recessed support surface so deep in the negative direction of the z-axis 12 that the main surface 21 and a surface of the housing 6 are essentially at the same level. The recessed support surface 19 therefore has the dimensions of the housing 6 of the head-up display unit 3 in a plane of the y-axis 13 and an x-axis 23 of the coordinate system 11.

[0038] The first receiving elements 18 are formed in particular from an elastomer and are therefore at least partially elastic. The corresponding first fastening elements 8 are received by the first receiving elements 18. Through the interaction of the first fastening elements 8 and the first receiving elements 18, the head-up display unit 3 can be attached to the first motor vehicle part 4 in a vibration-isolated manner.

[0039] Furthermore, the first motor vehicle part 4 has a first centering opening 24 and a second centering opening 25. The first centering opening 24 is designed as a round hole, while the second centering opening 25 is designed as an elongated hole extending in the direction of the y-axis 13.

[0040] During assembly, the head-up display unit 3 is inserted into the opening 17 in the direction of the negative z-axis 12 until the first centering element 9 is inserted into the first centering opening 24. The head-up display unit 3 is now fixed relative to the first motor vehicle part 4, except for rotation about the z-axis 12. In a next step, the head-up display unit 3 is rotated in steps until the second centering element 10 engages with the second centering opening 25. The elongated hole in the second centering opening 25 allows for the compensation of manufacturing tolerances in the distance between the first centering opening 24 and the second centering opening 25, i.e., the first motor vehicle part 4, and / or in the distance between the first centering element 9 and the second centering element 10, i.e., the head-up display unit 3.Once the centering elements 9, 10 have engaged the centering openings 24, 25, the respective first fastening elements 8 are also in the correct position to be pressed into the first receiving elements 18. To press the first fastening elements 8 into the first receiving elements 18, the head-up display unit 3 is pressed further in the negative direction of the z-axis 12. After overcoming an initial resistance, the head-up display unit 3 is attached to the first motor vehicle part 4 by the first fastening elements 8 and the first receiving elements 18, thereby isolating it from vibrations.

[0041] Furthermore, during assembly, the second fastening element 14 engages with another receiving element, which in the exemplary embodiment is referred to as the second receiving element 26, of the second motor vehicle part 5. The second receiving element 26 is formed with an elongated hole open at the edge. Furthermore, the second receiving element 26 is L-shaped. Thus, the elongated hole extends in the direction of the z-axis 12. The open edge of the elongated hole is located in the direction of the positive z-axis 12.

[0042] Thus, during assembly, the head-up display unit 3 can be moved in one spatial direction, which is described by the z-axis 12, using the elongated hole or the second centering opening 25, and in another spatial direction, which is described by the y-axis 13, using the nut 16 of the second fastening element 14. The screw 15 and the nut 16 thus allow the second receiving element 26 on the second motor vehicle part 5 to be moved along the y-axis 13 during assembly. The movement of the head-up display unit 3 in the direction of the y-axis 13 can be provided in particular by turning the external thread of the nut 16.

[0043] Fig. 4 also shows arrangement 2. According to Fig. 4 the arrangement 2 is in a more lateral view than in Fig. 3 The head-up display unit 3 is shown prior to assembly with the first vehicle part 4 and the second vehicle part 5. Clearly visible in this view is the L-shaped configuration of the second receiving element 26 and the elongated hole open at the edge of the second receiving element 26.

[0044] Fig. 5 shows the assembled arrangement 2. In the assembled arrangement 2, the first fastening elements 8 are engaged with the first receiving elements 18. As a result, the head-up display unit 3 is fastened in a vibration-decoupled manner with respect to the first motor vehicle part 4. Preferably, there is then no longer any contact between the first centering opening 24 and / or the second centering opening 25 and / or the first centering element 9 and / or the second centering element 10. Additionally or alternatively, the first centering opening 24 and / or the second centering opening 25 can be lined with a partially elastic material in order to dampen possible vibrations from the first motor vehicle part 4. In the assembled state of the arrangement 2 according to Fig. 5 The substantial weight of the head-up display unit 3 is absorbed by the second motor vehicle part 5, in particular by the fastening of the head-up display unit 3 with the second fastening element 14. When fastening the second fastening element 14 to the second receiving element 26, a play-compensating adjustment can be carried out. The adjustment can be carried out, for example, during assembly of the head-up display unit 3, but a subsequent adjustment of the head-up display unit 3 in the direction of the z-axis 12 and / or the y-axis 13 is also possible. The play-compensating fastening can, for example, compensate for gaps between the first motor vehicle part 4 and the head-up display unit 3.

[0045] Fig. 6 shows the first fastening element 8 and the first receiving element 18. During assembly, the first fastening element 8 is then pressed into the elastic first receiving element 18. This provides a vibration-decoupled and noise-decoupled connection between the head-up display unit 3 and the first motor vehicle part 4.

[0046] Fig. 7 shows the second fastening element 14, which provides the play-compensating fastening of the head-up display unit 3 to the second motor vehicle part 5. The second fastening element 14 has the screw 15 and the nut 16.

Claims

1. Arrangement (2) having at least one first motor vehicle part (4) of a motor vehicle (1) and a head-up display unit (3) having at least one fastening element (8, 14) for fastening the head-up display unit (3) to at least one motor vehicle part (4, 5) of a motor vehicle (1), wherein the head-up display unit (3) comprises a housing (6) and an imager (7), and the at least one fastening element (8, 14) is connected to the housing (6), wherein the at least one fastening element (8) is designed in a pin-shaped manner and for the vibration-decoupled fastening of the head-up display unit (3) to a first motor vehicle part (4), wherein the fastening element (8) is rigid, in particular made of plastics material or steel, and is designed for engagement in an elastic receptacle element (18), external to the display unit, for forming the vibration-decoupled fastening, characterized in that a head of the fastening element (8) is of a rounded design, wherein the first motor vehicle part (4) is formed with at least one receptacle element (18) for receiving a fastening element (8) of the head-up display unit (3), and the at least one receptacle element (18) is at least partially elastic, in particular formed from an elastomer.

2. Arrangement (2) according to one of the preceding claims, characterized in that the fastening element (8) is designed to be fastened to the first motor vehicle part (4) which is designed as a dashboard.

3. Arrangement (2) according to one of the preceding claims, characterized in that at least one centring element (9, 10) for the alignment of the housing (6) on the first motor vehicle part (4) is disposed on the housing (6).

4. Arrangement (2) according to Claim 3, characterized in that the at least one centring element (9, 10) is an assembly aid and is formed ahead of the fastening element (8).

5. Arrangement (2) according to one of the preceding claims, characterized in that the head-up display unit (3) is formed with a further fastening element (14) for fastening to a second motor vehicle part (5) of the motor vehicle (1), wherein the further fastening element (14) is designed for adjusting the position of the head-up display unit (3) in two spatial directions (12, 13) relative to the second motor vehicle part (5).

6. Arrangement (2) according to Claim 1, characterized in that the first motor vehicle part (4) is designed as a dashboard of the motor vehicle (1).

7. Arrangement (2) according to Claim 1, characterized in that the at least one receptacle element (18) is disposed in a support surface (19) formed on an upper side (20) of the first motor vehicle part (4) and recessed in relation to a main surface (21) of the first motor vehicle part (4), wherein the recessed support surface (19) surrounds an opening (17) in the first motor vehicle part (4) for pushing through the head-up display unit (3).

8. Arrangement (2) according to one of Claims 1 to 7, characterized in that the first motor vehicle part (4) is formed with at least one centring opening (24, 25) corresponding to a centring element (9, 10) of the head-up display unit (3) for aligning the head-up display unit (3) relative to the first motor vehicle part (4) when coupling the centring element (9, 10) to the centring opening (24, 25).

9. Arrangement (2) according to one of Claims 1 to 8, characterized in that the head-up display unit (3) by means of a further fastening element (14) of the head-up display unit (3) is fastened to a second motor vehicle part (5), which is in particular designed as a cross member, of the motor vehicle (1).

10. Arrangement (2) according to Claim 9, characterized in that the second motor vehicle part (5) is formed with an, in particular L-shaped, further receptacle element (26) for receiving the further fastening element (14), and the further receptacle element (26) has a slot, in particular open on the periphery, for the vertical positioning of the head-up display unit (3) relative to the second motor vehicle part (5).

11. Motor vehicle (1) having an arrangement (2) according to one of Claims 1 to 10.