Method for assembling a head-up display and head-up display

Abstract

The invention relates to a method for assembling a head-up display (1), comprising the following steps: - attaching a first elastic compression element (18) to a first edge region (16) of a rear face (14) of a first mirror (13) and a second elastic compression element (19) to a second edge region (17) of the rear face (14) of the first mirror (13); - introducing the first mirror (13) into a cover module (3) of a housing (2) of the head-up display (1) and adjusting a pre-assembly position of the first mirror (13) in the cover module (3), in which pre-assembly position the compression elements (18, 19) abut support surfaces (27, 28) of the cover module (3); - attaching a base module (6) to the cover module (3), wherein, during the connection, a front face (15) of the first mirror (13) is contacted by contact elements (23, 24) of the base module (6) and the first mirror (13) is pressed into a final assembly position, wherein the compression elements (18, 19) are compressed for this purpose and the first mirror (13) is pressed against the support surfaces (27, 28) of the cover module (3).

Description

Technical Field

[0001] One aspect of the present invention relates to a method for assembling a head-up display. Another aspect of the present invention relates to a head-up display for a motor vehicle. Background Technology

[0002] Head-up displays (HUDs) in motor vehicles typically have a housing. This can be formed from multiple sub-regions. In this case, for example, it can have a cover module and a base module. These two components can be combined together. For example, a plug connection, a snap-fit ​​connection, or a screw connection can be provided. In this respect, the cover module has a housing. The base module can also have a housing. These two parts in the form of a housing or shell also form the entire housing of the HUD. In this respect, they are therefore the externally visible components of the HUD. An image generating unit is typically arranged in the HUD. This generates an image that can be projected onto an external projection surface, such as the window glass of a motor vehicle, by means of the HUD. In addition, the HUD has at least one reflector inside the housing. The light beam generated by the image generating unit is reflected by this reflector. However, in a HUD, it is also conceivable to install two separate reflectors inside the housing. As a result, multiple deflections or multiple reflections are performed on the light beam generated by the image generating unit. In this case, the first reflector arranged closer to the image generating unit in the light beam path from the image generating unit to the exit window of the HUD is also called a folding reflector. With the second reflector positioned downstream of the beam path, the beam is deflected, specifically towards the exit window of the head-up display. To achieve very precise light deflection and thus light emission, and consequently, a clear image representation, the reflector must be precisely positioned within the housing; the arrangement of the reflector is paramount in this regard. However, undesirable positional tolerances may occur during the assembly of the head-up display.

[0003] Therefore, in the prior art, this type of first reflector is fastened to an optical chamber arranged inside the housing of the head-up display using a snap-fit ​​connection (e.g., via an additional cover), or adhesively attached to the optical camera. However, in both possibilities, the tolerance chain via the optical chamber is very long. The effect is that the resulting mirror tilt leads to an incorrect virtual image position. In the process involving adhesiveting the reflector to the optical chamber, bending of the reflector may occur due to the different coefficients of thermal expansion of the materials, thus potentially causing distortion of the image to be generated and projected. In the case of the snap-fit ​​option, tolerances arise, and these tolerances can lead to positional tolerances due to temperature differences and the continued lifespan of the head-up display, and this may also be associated with jitter. Therefore, in this respect, undesirable noise may also occur. Flickering of the generated image may also occur. Summary of the Invention

[0004] The object of the present invention is to provide a method for assembling a head-up display, and such a head-up display wherein the positioning of a first reflector within the head-up display is improved.

[0005] This objective is achieved by the method according to the independent claim and a head-up display.

[0006] One aspect of the present invention relates to a method for assembling a head-up display, the method comprising the following steps:

[0007] - Provides the first reflector for the head-up display;

[0008] - Attach a first elastic compression element to the first edge region on the rear side of the first reflector, and attach a second elastic compression element to the second edge region on the rear side of the first reflector;

[0009] - Introduce the first reflector with a compression element arranged on it into the cover module of the head-up display housing, and set the pre-assembled position of the first reflector in the cover module, wherein the compression element rests against the support surface of the cover module.

[0010] - Attach the base module of the housing, which is separate from the cover module, to the cover module, wherein when the base module is attached to the cover module, the front side of the first reflector contacts the contact element of the base module, and as the base module continues to be attached to the cover module, the first reflector is pressed into the final assembly position, wherein, for this purpose, the compression element is compressed and the first reflector presses against the support surface of the cover module.

[0011] Using this configuration, the problems explained at the beginning regarding the precise fixing and positioning of the first reflector within the head-up display can be significantly reduced. As a result of this process, it is now very easy to introduce the first reflector, pre-configured with a compression element, into the pre-assembly position. In this respect, it is therefore unnecessary to perform the final positioning of the first reflector on the associated housing component before the cover module is attached to the base module. In particular, the pre-assembly position can be achieved simply by inserting the first reflector into the cover module. Therefore, this pre-assembly position is not defined as a final or final assembly position. Thus, this process can be used to support rapid assembly scenarios, as the pre-assembly position can also be set very easily and quickly. In particular, the cover module is inverted. Therefore, the slotted cover module is positioned such that the slot opening points upward or substantially upward. This makes it particularly easy to introduce the pre-configured first reflector into the interior of the cover module from above, and in this respect, the pre-assembly position can be reached very easily and in a targeted manner. This makes it easy to set the first reflector in the cover module into the pre-assembly position.

[0012] Furthermore, the compression element ensures that the first reflector does not directly contact the support surface. Specifically, this occurs only indirectly via the compression element. In this way, the first reflector is also protected from undesirable influences originating from the support surface, particularly those affecting the rear. Therefore, by means of the compression element (which is elastic in this respect), the first reflector can then continue to move relative to the support surface in various ways. This is because, as the assembly process progresses, the intended compression characteristics of the compression element also allow the first reflector to move relative to the support surface, a movement that is both desirable and defined in this respect. This is particularly advantageous in the proposed assembly scenario. This is because, especially during the assembly of the cover module and the base module, an automatic position change of the first reflector from the pre-assembly position to the final assembly position can be performed. In this respect, this can be achieved in a very targeted manner through the feasibility of compressing the compression element. Therefore, even with a very simple adjustment of the position of the first reflector, the desired final assembly position of the first reflector, particularly also relative to the support surface, can be achieved very precisely, which is done indirectly by attaching the cover module to the base module.

[0013] Therefore, in the proposed assembly method, it is particularly desirable that the first reflector is moved out of the pre-assembly position in a defined manner when the cover module is attached to the base module. In this respect, it is specifically automatically pressed into the final assembly position. Since the compression element can also deform (especially be compressed) very uniformly, the final assembly position is also achieved very precisely. In both the pre-assembly and final assembly positions, one or more compression elements achieve a further advantage: the first reflector is also provided with damping supports on these support surfaces. In particular, this also allows for relative movement between the first reflector and the support surfaces in the installed state, and in particular, vibration damping can also be achieved.

[0014] In one exemplary embodiment, the first reflector is positioned in a pre-assembly position within the cover module. This is a particularly simple way to introduce the first reflector into the cover module. Furthermore, the pre-assembly position is thus simple and quick to achieve. Therefore, simply placing it in the cover module eliminates the need for further complex assembly processes to achieve the pre-assembly position. In this pre-assembly position, the first reflector is specifically arranged at an angle within the cover module. Therefore, it is advantageous to avoid undesirable falling of the first reflector in the pre-assembly position. In this respect, the positioned location is also relatively reliably maintained. In one exemplary embodiment, during the setting of the pre-assembly position, the first reflector is provided with an outer peripheral edge, particularly the upper outer peripheral edge, located on at least one support member of the cover module. Therefore, the assembly position in this respect is correspondingly supported at this outer peripheral edge. Thus, on the one hand, the reflector rests directly on these narrow, particularly web-shaped supports by means of this outer peripheral edge, and therefore, in this assembly scenario, the reflector can also be reliably positioned in this respect by means of the gravity of the first reflector. On the other hand, it rests indirectly on a support surface, which is angled in this assembly position of the cover module, via a compression element.

[0015] In one exemplary embodiment, the compression elements are configured as elongated strips. In one exemplary embodiment, they may extend over at least 60%, particularly at least 70%, of the length of the corresponding edge region on the rear side. In particular, the compression elements are attached to the rear side parallel to another peripheral edge defining the edge region. This shape and orientation is advantageous because direct contact between the compression elements and the strip shape of the corresponding support surface is feasible. On the one hand, this allows for a very targeted pre-assembly position. However, the relative movement of the first reflector as the assembly process proceeds, both when the compression elements are compressed and when the first reflector moves toward the fixed support surface, is also particularly advantageous. This allows for particularly uniform compression of the compression elements through their respective geometry. The support surface is preferably designed to be uninterrupted, and the compression elements rest against such support surface in surface contact (particularly full surface contact) by means of their strip-shaped exposed element surfaces. Thus, the aforementioned further scenario can advantageously be achieved during the assembly of the head-up display.

[0016] Furthermore, this attachment of the compression element at the edge provides a design that is relatively economical in terms of components and can interact mechanically with the corresponding support surface in a particularly advantageous manner.

[0017] In one exemplary embodiment, the compression elements are configured as foam strips. Specifically, they can be formed in a cuboid or rod-like manner. In particular, the foam strip configuration allows for easy attachment to the first reflector. Furthermore, the desired compressibility is thus achieved in a particularly advantageous manner. Especially, the foam configuration also provides long-term durability, resulting in a long material lifespan. The final assembled position of the first reflector can be precisely maintained even in the final installed state and in the permanently compressed state of the compression elements.

[0018] In one exemplary embodiment, the compression element is adhesively bonded to the rear side of the first reflector. Specifically, the compression element is disposed only on these edge regions.

[0019] In one exemplary embodiment, the procedure for connecting the base module to the cover module involves first inserting an insertion element of one module into a corresponding insertion receiver of the other module. This also means that the initially separate components associated with the base module and the cover module move toward each other. From the initiation of the subsequent joining process, the insertion element and the insertion receiver move toward each other. Once the associated assembly state has been achieved (in which insertion of the insertion element into the insertion receiver then just begins, and therefore mutual engagement of the insertion element into the insertion receiver begins), in this state, the contact element is also defined to be arranged at a distance from the front side of the first reflector and therefore not in contact with the front side of the first reflector. This ensures that the initial mechanical coupling via the insertion means including the insertion element and the insertion receiver takes effect first, even before the contact element contacts the front side and applies force to the first reflector. The initial engagement of the insertion element and the insertion receiver ensures a basic position is achieved between the base module and the cover module. When the contact element subsequently contacts the front side of the first reflector, the base module and the cover module can no longer displace relative to each other in an undesirable manner, and therefore no longer displace to any significant extent in a plane perpendicular to the engagement direction. Thus, as the assembly process progresses, the contact element's touching of the front side of the first reflector and the force applied by the contact element to the front side of the first reflector (which then occurs as the assembly process continues) can also be performed in a very directional and defined manner. This is because, in this case, the insertion element and the insertion receiver, which have already been guided in each other but not yet connected to each other in their respective final insertion states, also form mechanical guides to enable the corresponding pressing of the contact element against the front side of the first reflector.

[0020] Therefore, this intermediate assembly state precisely realizes an efficient and highly functional assembly concept. This avoids unwanted positional displacement of the components relative to each other. Precisely, the subsequent direct mechanical contact between the contact element and the front side of the first reflector can thus be achieved very precisely and at the exact desired time during the assembly process.

[0021] In one exemplary embodiment, as the process of inserting the insert elements into the insert receiver continues and begins with the substantially already engaged insert elements into the insert receiver, the front side is then mechanically and directly contacted by the contact element. From this contact state already achieved between the contact element and the front side of the first reflector, as the cover module continues to engage with the base module, and thus as the insert elements continue to be inserted into the insert receiver, compression of the compression element is automatically achieved, and thus the first reflector is automatically pressed in the direction of the support surface. This approach of the contact element to the front side of the first reflector (guided by the insertion device), and then further guiding and controlled pressing of the contact element against the front side, and automatically causing compression of the compression element, and consequently automatically causing a defined relative movement of the first reflector in the direction of the support surface, also enables the final assembly position of the first reflector to be achieved in a particularly precise and finely controlled manner. Undesirable sudden force effects and abrupt position adjustments on the first reflector can also be avoided.

[0022] In one exemplary embodiment, during the further process of inserting the insertion element into the insertion receiver when the base module and cover module are combined, it is automatically ensured that the contact elements already abutting the front side of the first reflector move relative to the front side while they are abutting the front side of the first reflector. This relative movement generates a force on the first reflector, which moves the first reflector in the direction of the support surface. Due to the elastic construction of the compression elements, the compression elements are compressed during this movement of the reflector, thus making the corresponding movement of the reflector toward the support surface particularly advantageous. On the one hand, the compression elements allow this movement; on the other hand, they form damping elements that facilitate the guided movement of the reflector. Since the compression of the compression elements generates a certain reaction force, the movement of the reflector can be made feasible in a particularly advantageous guided and directed manner. Furthermore, this configuration also makes it feasible for a very uniform movement of the reflector toward these support surfaces. In particular, this advantageously makes linear or substantially linear movement of the first reflector toward the support surface feasible. The final assembly position can therefore be a position parallel to the pre-assembly position.

[0023] In one exemplary embodiment, the tilting orientation of the contact element causes the direction of the force to be generated at an angle not equal to 0° and not equal to 180° relative to the engagement direction in which the base module and the cover module are placed together. Therefore, the direction of the force acting on the first reflector is not actually parallel to the engagement direction in which the base module and the cover module are joined together, particularly the linear engagement direction. Specifically, this engagement direction should be understood as being along the assembly path in which the insertion element and the insertion receiver engage with each other.

[0024] By utilizing this orientation between the force direction and the joining direction, a highly advantageous assembly scenario can be achieved for the first reflector to be transferred from a pre-assembled position to a final assembled position. This also makes it possible to realize the relative position between the cover module and the base module during this assembly process, particularly in the linear direction of the joining direction, so as to simultaneously and automatically realize the movement of the first reflector relative to a support surface with a different orientation. In this respect, although various relative movements are simultaneously achieved during the joining of the cover module and the base module, and therefore the first reflector then also moves relative to the cover module and the base module, the cover module and the base module can still be joined together very precisely, while the final assembled position of the first reflector can be automatically realized in a precise manner.

[0025] In one exemplary embodiment, the engagement or connection of the base module and the cover module is performed by a linear engagement movement. In particular, this occurs at least from the position where the insertion element has just engaged in the insertion receiver. If appropriate, prior movement of the base module and the cover module toward each other may also have occurred in this engagement direction, and in this respect, in particular, a linear engagement movement can be performed.

[0026] In one exemplary embodiment, the base module is provided with an integral housing. Contact elements are integrally formed on the housing. In such an exemplary embodiment, in particular, the base module housing can be provided as being integrally manufactured with the contact elements. For example, this can be a plastic part. It can then be manufactured as an injection-molded part.

[0027] In one exemplary embodiment, the base module is provided with a housing, and a component for creating an optical chamber in a head-up display, separate from the housing, is mounted within the housing. This separate component may have a substrate and may have a frame integrally formed on the substrate. This forms a well or chamber, which, depending on the intended purpose, also represents the formation of the optical chamber in the head-up display.

[0028] The head-up display may also have a second reflector. This is a reflector separate from the first reflector. The second reflector can be mounted in the housing. The intended purpose of the second reflector is to deflect or reflect light that has been deflected by the first reflector and reflected from the first reflector to the second reflector back to the exit window of the head-up display housing. In the exemplary embodiment described, the base module having the housing and the separate components and / or the second reflector is configured as a base module pre-assembled with the components in this respect. As described above, this pre-assembled base module can then be connected to the cover module.

[0029] In one exemplary embodiment, the contact element may be integrally formed on the component provided for generating the optical chamber. In another exemplary embodiment, the component may also be integrally manufactured. It may also be made of plastic.

[0030] Therefore, the contact elements of the base module can be formed on the housing or on the component, or in another exemplary embodiment, as contact elements on both the component and the housing. In each case, an integral configuration can be provided.

[0031] Another aspect of the invention relates to a head-up display (HUD) for a motor vehicle. The HUD has a housing. It has a cover module and a base module. A first reflector of the HUD is arranged in the housing, by means of which light from the image generation unit of the HUD is deflected or can be deflected. Specifically, the intended purpose of the first reflector is to deflect light from the image generation unit to a possible second reflector of the HUD, or, if a second reflector is not present, to deflect it directly to the exit window of the HUD.

[0032] The elastic compression elements are preferably arranged at the rear edge region of the first reflector. In the final assembled state of the first reflector in the housing, these compression elements rest directly against the support surface of the cover module. The base module has contact elements, particularly contact elements integrated with and thus integrally formed with the base module, which rest against the reflective front side of the first reflector, causing the first reflector to be subjected to force in the direction of the support surface. Therefore, the compression elements are compressed in the final assembled state of the first reflector, and the first reflector is pressed against the support surface. In this respect, since the first reflector does not have direct contact with the support surface, indirect contact pressure is formed, but in this respect, the compression elements are located therein. The advantages that can be achieved by such a head-up display have already been mentioned above.

[0033] In one exemplary embodiment, the contact elements are formed with strip-shaped contact surfaces oriented at an angle to the longitudinal axis of the head-up display. The assembly direction of the modules can be oriented along this longitudinal axis. These strip-shaped contact surfaces face the front edge region of the first reflector. In particular, they rest directly against these front edge regions. In one exemplary embodiment, the front edge region is opposite to the rear edge region, and the compression element is arranged on the rear edge region. Therefore, in one exemplary embodiment, the contact surfaces of the strip-shaped compression element and the contact elements are also oriented in pairs parallel to each other on opposite sides of the first reflector. Thus, a very space-saving yet highly functional configuration can be achieved. In particular, this also enables the first reflector to be precisely moved from a pre-assembled position to a final assembled position, and on the other hand, to be precisely maintained in the final assembled position.

[0034] In one exemplary embodiment, the contact surfaces of the contact elements are smooth. This means that their surface roughness is reduced, for example, by grinding or polishing. In particular, this is provided in an exemplary embodiment where the contact elements are components of the housing of the base module, and specifically, are then made of a die-cast material.

[0035] In one exemplary embodiment, a reflective film may be provided on the front side of the first reflector, particularly also at the edge region, the reflective film intended for direct abutment of the contact elements of the base module thereon. This can then also serve as an intermediate layer between the glass material of the reflector and the contact elements, particularly as a sliding film for the contact elements. The film can be attached by optical bonding.

[0036] Another aspect of the invention relates to a motor vehicle having such a head-up display. Attached Figure Description

[0037] Exemplary embodiments of the invention will now be discussed in more detail based on the accompanying drawings. In the drawings:

[0038] Figure 1 An exploded view of an exemplary embodiment of a head-up display according to the present invention is shown;

[0039] Figure 2 It shows that according to Figure 1 An exploded view of a head-up display, in which, with Figure 1 In contrast, some components are already connected to each other;

[0040] Figure 3 The data shows the intermediate assembly state. Figure 1 A perspective view of a sub-component of the head-up display;

[0041] Figure 4 It shows that it is in the succession Figure 3The subsequent intermediate assembly state, according to Figure 3 Components;

[0042] Figure 5 It shows that it is in the succession Figure 4 A diagram of the components of the head-up display in its intermediate assembly state;

[0043] Figure 6 It shows that it is in the succession Figure 5 The intermediate assembly state afterwards Figure 5 Illustrations of the components;

[0044] Figure 7 It shows Figure 6 A perspective cross-sectional view of the assembled state; and

[0045] Figure 8 A cross-section through a fully assembled head-up display is shown.

[0046] Components that are identical or have the same function are represented by the same reference numerals in the accompanying drawings. Detailed Implementation

[0047] Figure 1 An exploded view of an exemplary embodiment of the head-up display 1 is shown. The head-up display 1 can be installed in a motor vehicle. In this respect, the head-up display 1 can be used to project optical information onto a windshield, for example, so that it can be perceived by a vehicle occupant sitting in the driver's seat within the driver's field of vision when viewed through the windshield. The head-up display 1 has a housing 2. The housing 2 has a cover module 3. The cover module 3 has a slotted design. It can also be referred to as a shell. In the upper region, it has an observation window 4. A light beam generated by the image generation unit 5 of the head-up display 1 exits from the housing 2 to the outside through the observation window 4. Here, the window 4 is formed by a transparent wall.

[0048] The head-up display 1 also has a base module 6. The base module 6 has at least one housing 7. This can be connected to the housing 8 of the cover module 3 to form a shell 2. In this respect, housings 7 and 8 are separate components. Therefore, housing 7 can be formed as, for example, a die-cast part. For example, housing 8 can be made of plastic. For example, it can be an injection-molded part. Housings 7 and 8 can also be referred to as a shell.

[0049] The head-up display 1 also has a component 9. This is a separate component. In an exemplary embodiment, component 9 has a substrate 10 and a frame portion 11. In particular, component 9 is integrally designed. It forms the component that provides the optical chamber 12 of the head-up display 1.

[0050] Furthermore, in an exemplary embodiment, the head-up display 1 has a first reflector 13. The first reflector 13 has a rear side 14 and a front side 15. The front side 15 is provided and arranged in the housing 2 for its intended purpose, such that it deflects or reflects the light beam emitted by the image generating unit 5.

[0051] In this configuration, corresponding compression elements 18 and 19 are arranged on the rear side 14 at edge regions 16 and 17. In an exemplary embodiment, compression elements 18 and 19 are foam components. They are arranged on these edge regions 16 and 17 of the rear side 14. In this regard, adhesive bonding may be provided, for example. Here, compression elements 18 and 19 are strand-like or rod-like components. They may be correspondingly cubic designs. Furthermore, in an exemplary embodiment, the head-up display 1 has a second reflector 20. In the assembled state of the head-up display 1, this reflector is arranged such that a light beam deflected by the first reflector 13 illuminates the front side 21 of the second reflector 20 and is deflected or reflected from there to the exit window 4.

[0052] In the installed state, the first reflector 13 is arranged in the niche 22 of the cover module 3.

[0053] from Figure 1 As can be seen from the exemplary embodiment, the base module 7 has two contact elements 23 and 24. These contact elements 24 have strip-shaped contact surfaces 25 and 26. Figure 1 As shown, these contact surfaces 25 and 26 are tilted. This also applies particularly to the longitudinal axis A of the head-up display 1.

[0054] Figure 2 An exploded view of the head-up display 1 is shown. Here, the base module 6 is shown, and the second reflector 20 and component 9 are correspondingly mounted in the housing 7. An image generation unit 5 is also installed; in this respect, Figure 2 The image generation unit 5 is no longer visible. The first reflector 13 is also mounted in the cover module 3, and in this respect, it is arranged in the niche 22.

[0055] Regarding the assembly of the head-up display 1, the cover module 3 is preferably first inverted, so that it is upside down (see...). Figure 3 This provides an entrance to the interior 3a of the cover module 3, particularly from above. A first reflector 13 is provided. In this respect, it is envisioned that compression elements 18 and 19 are already arranged on, and particularly fastened to, edge regions 16 and 17. The first reflector 13, arranged in this manner, is then introduced into the cover module 3. For this purpose, the reflector 13 is set in the cover module 3. In this process, the reflector 13 with compression elements 18 and 19 is arranged in a pre-assembled position. In this respect, it is possible to... Figure 4A first support surface 27 is visible in the niche 22. Specifically, this support surface 27 may be strip-shaped. It is positioned obliquely relative to the longitudinal axis A. Another support surface 28 may be formed on the opposite side. This is intended for direct contact with another compression element 18.

[0056] Figure 4 The cover module 3 is shown, in which the first reflector 13 is arranged in a pre-assembled position. In this pre-assembled position, the reflector 13 rests on the web-like supports 30 and 31 of the cover module 3, particularly on the niche 22, via its edge 29. Furthermore, beam-shaped compression elements 18 and 19 abut against the support surfaces 27 and 28. Specifically, the pre-assembled position is characterized in that the first reflector 13 is disposed solely within the niche 22 and is positioned at an angle due to its inclined arrangement. It can be seen that the supports 30 and 31 have protrusions 32 and 33. This prevents the first reflector from sliding out of the niche on the supports 30 and 31. In this respect, the inclined position is maintained. Furthermore, Figure 4 The image also shows the edge regions 15a and 15b of the front side 15. These are directly opposite the edge regions 16 and 17 of the rear side 14.

[0057] Starting from this intermediate assembly state, according to Figure 5 The diagram shows base module 6 (especially according to...). Figure 2 The diagram in the image is prefabricated in the pre-assembled module and then installed on the cover module 3. In an exemplary embodiment, the base module 6 is placed on the cover module 3 from above via a linear coupling direction P.

[0058] based on Figure 5 The illustration in the image, Figure 6 This demonstrates the state in which further integration has been carried out in this regard. Specifically, as in... Figure 6 As can also be seen, the base module 6 has an insertion element 34. In an exemplary embodiment, this is formed directly on the contact element 23. The insertion element 34 is for insertion into the insertion receiver 35 formed on the cover module 3. Figure 7 In ), another inserted element 36 ( Figure 6 It is formed at the opposite end of the base module 6. Here, in the exemplary embodiment, it is not formed directly on the other contact element 24, but is formed separately from and at a certain distance from the other contact element 24. In addition, another insertion receiving seat 37 formed in the cover module 3 is shown. Figure 7 A perspective cross-sectional view of this aspect is shown, in which the cover module 3 is shown in section in the area of ​​the insertion receiver 35.

[0059] from Figure 6Starting from the intermediate assembly position reached, the base module 6 moves linearly toward the cover module 3. Then, insertion elements 34 and 36 are subsequently inserted into insertion receivers 35 and 37. As insertion elements 34 and 36 begin to engage with each other in insertion receivers 35 and 37, contact elements 23 and 24, particularly strip-shaped contact surfaces 25 and 26, are arranged at a distance from the front side 15 of the first reflector 13. During further insertion, where insertion elements 34 and 36 are inserted into insertion receivers 35 and 37, the front side 15 is subsequently directly contacted by contact elements 23, 24, particularly strip-shaped contact surfaces 25 and 26. As the insertion process then continues further, these contact elements 23 and 24, particularly the contact surfaces 25 and 26 directly resting against the front side 13, move relative to the front side 15 while resting on it, and particularly then relative to the reflector 13. Due to the angular or inclined orientation of contact surfaces 25 and 26 relative to the linear engagement direction P, as well as... Figure 7 As shown again, the force is applied to the first reflector 13 by contact elements 23 and 24 (specifically contact surfaces 25 and 26). This force then causes the first reflector 13 to move toward the support surfaces 27 and 28, compressing the compression elements 18 and 19 in doing so. Due to the inclined orientation of contact surfaces 25 and 26, the force involved is generated at an angle not equal to 0° and not equal to 180° with respect to the bonding direction P. Because of this linear or substantially linear bonding direction P, in particular, the first reflector 13 also moves linearly or substantially linearly by a force oriented at an angle thereto, more specifically, in the direction of these support surfaces 27 and 28.

[0060] Figure 8 A perspective cross-sectional view of the final assembly state between the base module 6 and the cover module 3 is shown. This illustrates the final state of complete assembly. In this case, it can also be seen that the insertion element 34 has been inserted into the insertion receiver 35. In this respect, Figure 8 It shows that according to Figure 7 The image shows a side view of the device, with only the lower region shown in cross-section, and the base module 6 shown from the side in the upper region. In this final assembled state, the first reflector 13 is then positioned in its final assembled position. After reaching the final assembled position, the compression elements 18 and 19 remain compressed. In this respect, the first reflector 13 is in mechanical contact with the strip-shaped support surfaces 27 and 28 via the compression elements 18 and 19.

[0061] The contact surfaces 25, 26 and the beam-shaped compression elements 18, 19 are oriented in pairs parallel to each other on opposite sides 14, 15 of the first reflector 13. This forms an advantageous force path from the contact elements 23, 24 to the support surfaces 27, 28.

Claims

1. A method for assembling a head-up display (1), comprising the following steps: - Provides a first reflector (13) for the head-up display (1); - Attach the first elastic compression element (18) to the first edge region (16) of the rear side (14) of the first reflector (13), and attach the second elastic compression element (19) to the second edge region (17) of the rear side (14) of the first reflector (13). - The first reflector (13) on which the elastic compression elements (18, 19) are arranged is introduced into the cover module (3) of the housing (2) of the head-up display (1), and the first reflector (13) is set in a pre-assembly position in the cover module (3), in which the elastic compression elements (18, 19) rest against the support surface (27, 28) of the cover module (3). - The base module (6) of the housing (2), which is separate from the cover module (3), is attached to the cover module (3), wherein, When the base module (6) is connected to the cover module (3), the front side (15) of the first reflector (13) contacts the contact elements (23, 24) of the base module (6), and as the base module (6) continues to be attached to the cover module (3), the first reflector (13) is pressed into the final assembly position, wherein, for this purpose, the elastic compression elements (18, 19) are compressed, and the first reflector (13) presses against the support surface (27, 28) of the cover module (3).

2. The method according to claim 1, wherein, The first reflector (13) is disposed at the pre-assembled position in the cover module (3) and is arranged in the cover module (3) at an angle, wherein the first reflector (13) is provided with an outer peripheral edge (29) on at least one support (30, 31) of the cover module (3).

3. The method according to claim 1 or 2, wherein, The elastic compression elements (18, 19) are configured as elongated beams that extend over at least 60% of the length of the corresponding edge regions (16, 17) of the rear side (14).

4. The method according to claim 1 or 2, wherein, The elastic compression elements (18, 19) are configured as foam strips.

5. The method according to claim 1 or 2, wherein, When the base module (6) is connected to the cover module (3), the insertion elements (34, 36) of one module (3, 6) are first inserted into the insertion receivers (35, 37) of the other module (3, 6), wherein when the insertion elements (34, 36) begin to engage with each other in the insertion receivers (35, 37), the contact elements (23, 24) are still arranged at a certain distance from the front side (15) of the first reflector (13).

6. The method according to claim 5, wherein, As the insertion process of the insertion elements (34, 36) into the insertion receivers (35, 37) continues, the front side (15) is further directly contacted by the contact elements (23, 24), and as the insertion process continues, the elastic compression elements (18, 19) are compressed and the first reflector (13) is pressed in the direction of the support surfaces (27, 28).

7. The method according to claim 6, wherein, During this further insertion process, the contact elements (23, 24) resting on the front side (15) move relative to the front side (15), and this movement of the contact elements (23, 24) relative to the front side (15) generates a force on the first reflector (13), which presses the first reflector (13) in the direction of the support surface (27, 28).

8. The method according to claim 7, wherein, The direction of the force generated by the tilting orientation of the contact elements (23, 24) is at an angle not equal to 0° and not equal to 180° with the bonding direction (P) of the base module (6) to the cover module (3).

9. The method according to claim 8, wherein, The base module (6) is connected to the cover module (3) by linear coupling movement in the coupling direction (P).

10. The method according to claim 8, wherein, The base module (6) is provided with an integral housing (7), and the contact elements (23, 24) are integrally formed on the housing (7).

11. The method according to claim 8, wherein, The base module (6) is provided with a housing (7), and a component (9) for generating an optical chamber (12) in the head-up display (1), which is separate from the base module (6), is installed in the housing (7), and / or a second reflector (20) of the head-up display (1) is installed in the housing (7), wherein the base module (6) pre-assembled in this way is connected to the cover module (3).

12. The method according to claim 11, wherein, The component (9) is provided with the contact elements (23, 24) integrally formed thereon.

13. The method according to claim 3, wherein, The slender beam extends over at least 70% of the length of the corresponding edge region (16, 17) on the rear side (14).

14. A head-up display (1) for a motor vehicle, having a housing (2) having a cover module (3) and a base module (6), wherein a first reflector (13) is arranged in the housing (2), and light from an image generating unit (5) of the head-up display (1) is deflected by the first reflector (13). Its features In the final assembled state, the elastic compression elements (18, 19) rest on the support surface (27, 28) of the cover module (3). The elastic compression elements (18, 19) are arranged on the edge region (16, 17) of the rear side (14) of the first reflector (13). The base module (6) has contact elements (23, 24) that rest on the front side (15) of the first reflector (13) for reflection, such that the first reflector (13) is subjected to force in the direction of the support surface (27, 28). Therefore, the elastic compression elements (18, 19) are compressed in the final assembled state of the first reflector (13), and the first reflector (13) presses against the support surface (27, 28).

15. The head-up display (1) according to claim 14. Its features are, The contact elements (23, 24) have strip-shaped and obliquely oriented contact surfaces (25, 26) that rest directly on the edge regions (15a, 15b) of the front side (15), which are opposite to the edge regions (16, 17) of the rear side (14).

16. The head-up display (1) according to claim 15. Its features are, The elastic compression elements (18, 19) are configured as slender beams, and the contact surfaces (25, 26) and the elastic compression elements (18, 19) are oriented in pairs parallel to each other on opposite sides (14, 15) of the first reflector (13).

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