The invention relates to a mirror carrier for fixing an imaging device of an indirect vision system to a vehicle, particularly for a commercial vehicle. In addition, the present invention relates to such an indirect vision system that is equipped or furnished with a similar type of novel mirror carrier.
A well-known example of an “imaging device of an indirect imaging system” is the mirror glass or reflective surface in an (exterior) rear view mirror of a vehicle. Other examples of such imaging devices are cameras and other image sensors. The following description, drawings and explained embodiments relate to the design of an imaging device in the form of a mirror glass or similar reflective area. The present invention is also equally applicable to other imaging devices such as cameras and the like. In general, the present invention and the mounting of its parts or components can be used on a carrier arm for direct or indirect driver support.
A rear-view mirror, in particular an exterior mirror and the associated mirror housing must be supported by and fixed to the vehicle or to the body parts of the vehicle. In these cases, the mirror is attached at a certain distance from the body part so that the rear view mirror can be used for its designed purpose. It is standard practice to use cantilevered support arms or support brackets that are normally secured to the vehicle body at one end and carry the mirror housing on the other free end. In the case of support brackets, the bracket is equipped with two support arms that are both connected at one end to the vehicle body, and the two other free ends are jointly connected by an additional support arm. The usually nearly vertically extending support arm is then used to attach one or more rear view mirrors and their mirror housings.
Irrespective of the design of the support arm that is fixed to the vehicle, the connection between the support arm and the imaging system (or the mirror housing or mirror carrier) is a critical aspect of the entire rear-view-mirror or indirect-vision system. Increased attention must be devoted so that the requirements that occur in practice are fulfilled, and therefore that the manufacturing, assembly and maintenance of the indirect-vision or rear-view-mirror systems do not create any possible disadvantages.
The device for mounting and aligning the rear view mirror on a vehicle is collectively referred to herein as a carrier device, mirror carrier or mounting device. The support arm is fastened to the vehicle, and at least one end is attachable to the arm support member. The support member in turn has connection means for mounting in the same way as the rear view mirror or the mirror housing. The support member is important because it is fastened to the bracket and thus represents the interface between the mirror and the support arm.
The connection between the support member and support arm must be able to be installed with little effort. The entire indirect-vision or rear-view-mirror system must not add too much bulk and must be vibration-resistant, durable and secured long-term, i.e., resistant to loosening. It is standard practice to fix the support member to the support arm by cable clamps or comparable clamping devices. The problem here is that the clamp connection loosens over time due to vibrations, thermally-induced expansion and contraction processes, driving wind pressure or other similar factors. Attention must also be paid to the aspect of corrosion, so that unsuitable material combinations must be avoided.
Other mounting configurations for the support member to the support arm are screws or pins. These connecting options also suffer from the disadvantages of susceptibility to vibration, risk of loosening and, in most instances, insufficient continuous load resistance due to material fatigue and fractures or the like.
Thus, a mounting or support device is sought that can be manufactured with a minimum of design and construction effort and has maximum operational reliability and functionality that is sustainable over a long service lifetime.
A mirror carrier for attaching an imaging device of an indirect vision system to a vehicle includes a support arm fixed to the vehicle and at least one carrier member attached to the support arm. The carrier member uses contact points to mount the imaging device. The carrier member is formed, at least on a fixing area of the support arm, from a thermoplastic melt-processable material and encapsulates the support arm as a closed-walled thermoplastic mold. The carrier member is molded around the support arm in the fixing area of the support arm using an injection molding process.
A mounting device for an indirect vision system of a vehicle includes a support arm attached to the vehicle, an imaging device such as a mirror glass and a carrier member onto which the imaging device is mounted. The carrier member includes thermoplastic melt-processable material that is injection molded around a fixing area of the support arm such that the thermoplastic material completely seals and circumferentially surrounds the fixing area of the support arm. In the fixing area, the support arm has various gripping surfaces or protruding pins or bolts that improve the axial positional fixing of the carrier member to the support arm. Except in the fixing area, the cross section of the support arm is circular. For example, in the fixing area the support arm is oval or kidney shaped or has a groove into which the thermoplastic material enters as the material is molded around the fixing area. In one embodiment, the thermoplastic material shrinks away from portions of the fixing area as the thermoplastic material cures so as to exert pressure along a longitudinal groove in the support arm to create a gripping tension between the carrier member and the support arm. In another embodiment, the thermoplastic material circumferentially surrounds the fixing area of the support arm in multiple separate ring-shaped gripping sections.
Other embodiments and advantages are described in the detailed description below. This summary does not purport to define the invention. The invention is defined by the claims.
The accompanying drawings, where like numerals indicate like components, illustrate embodiments of the invention. The separate figures are schematic and not necessarily drawn in corresponding scale to one another.
Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.
The carrier member 11 is thermoplastically molded to the support arm 12 instead of being attached by mechanical, auxiliary or additional materials, such as screws, bolts, clamps or other similar methods. Thus, the carrier member 11 surrounds the carrying arm as a closed-walled unit. The term “closed-walled” signifies that the carrier member 11 completely seals and surrounds the support arm 12 circumferentially without any interruptions. The molding to form a closed wall is in contrast to a slotted clamp in the axial direction of the terminal, which is then clamped to the support arm 12 by a clamping screw, bolt or the like.
The mounting and securing of the carrier member 11 is thus achieved solely by thermoplastic shaping of the carrier member 11, at least in its fixing area, so that complex mechanical clamping and fixing methods and any associated problems and disadvantages can be dispensed with. Because the carrier member 11, at least within the fixing area, is shaped around the support arm 12 as a closed-wall system due to its thermoplastic form, the fixing of the carrier member 11 on the support arm 12 is extremely stable, vibration-resistant and durable.
The support arm 12 is formed as an elongated, rectilinear unit, at least in the fixing area, with the carrier member 11, as is already customary in bow-shaped carrier devices. However, the novel carrier member 11 is equally applicable to simply designed support arms in which the indirect vision system 13 (mirror, mirror head, mirror housings) is fastened on the free end of a single arm.
The support arm 12 has a tubular profile, which is available as a prefabricated and inexpensive, semi-finished product. The thermoplastic shaping of the carrier member 11, at least in the fixing area around the support arm 12, allows the carrier member 11 to be fixed directly and in close contact with the periphery of the support arm 12, even when there are deviations from the target shape requirement or the target contour shape in the fixing area. For example, if the support arm 12 in the fixing area includes deviations in its dimensions due to previous prefabrication or processing steps, such as deformations from bending operations, surface irregularities, etc., it is not necessary to realign the support arm 12 again to create the target contour or the target surface cross-section so that a clamp connection can satisfactorily function. The carrier member 11 “forges” itself virtually gap-free by utilizing thermoplastic forming and is therefore also secure for such deformed support arms. The tubular profile preferably has a round cross-section and is therefore inexpensive and simple to obtain and to produce.
To increase the secure connection between the carrier member 11 and the support arm 12, the support arm 12 has a different shape in the fixing area from the rest of the tubular profile that has a round cross section. The different cross section can be formed by a targeted, permanent deformation of the tubular section wall by lateral flattening to provide the support arm 12 in the fastening area with a more or less pronounced oval cross-section. The tube can also have other cross-sectional profiles, such as a rounded cross-section with a flat section or with edges formed by a pressing process.
The different cross sections improve the connection between the carrier member 11 and the support arm 12 in the circumferential direction, and therefore also better protect against any twisting of the carrier member 11 in relation to the support arm 12. In order to improve the axial positional fixing of the carrier member 11 to the support arm 12, the divergent shape can be formed with a separate component that is rigidly connected around the profile of the tube and projects outwards from it. These projecting components can be pins, bolts or screws that are inserted or screwed into the support arm 12 and that protrude radially from the tube's external circumference. The protruding components both protect against twisting as well as against displacement of the attached carrier member 11.
Other possibilities for increasing the connection strength are grooves, creases, drill holes, indentations and knurls on the outer peripheral surface in the fixing area between the carrier member 11 and the support arm 12. These surface deformations also improve the connection and interlocking between the support arm 12 and the thermoplastically formed material of the carrier member 11.
In one embodiment, the carrier member 11 is cast around the support arm 12 in the fixing area using injection molding. The casting of the carrier member 11 around the support arm 12 in a plasticized state of the thermoplastic material enables in a single process step not only the formation of the carrier member 11 itself, but also the attachment to the support arm 12. The support arm 12 is essentially molded into the fixing area of the carrier member 11 in a distortion-free process. The molding ensures that there are no inherent tensions in the produced carrier member 11 that could lead, particularly at low temperatures, to breakages of the carrier member 11 when it is exposed to shocks or impacts.
However, there can also be a radially directed shrinkage in the fixing area after the casting process that leads to a directed and wanted tensioning between the support arm 12 and the carrier member 11. The support arm 12 can still exhibit surface contouring that presses against sections of the shrunk, tensioned carrier member 11. This shrinkage and tensioning ensures that the connection between the support arm 12 and the carrier member 11 is particularly secure.
The imaging device may be a rear view mirror, in which case the carrier member 11 is part of a glass adjuster. The carrier member 11 can also be part of a head adjuster. The support arm 12 should be constructed of metal or a metal alloy with the appropriate strength and resistance values.
Along with the carrier member 11 for an imaging device, an additional component may be arranged on the support arm 12 that functions to support or assist the driver. One such additional component is the transmitter or receiver for a GPS system. The additional component is also fixed to a carrier member 11 on the support arm 12. The subject matter of the present invention is not limited to imaging devices, but instead covers a general attachment method for construction members and components on support arms that support and assist the driver of the vehicle.
The fixing of the mirror carrier 10 (or mounting device) onto the vehicle 16 is performed using the support arms 12 shown in
In the embodiment of
The embodiment of
The latest technical standards determine the exact construction of the embodiments of
The embodiment 35 at the second-to-left position in
The third design 37 from the left in
The design 38 on the far right in
The carrier member 11 may be formed entirely from a thermoplastic melt-processable material or it may include the thermoplastic melt-processable material only in the gripping section 21. The thermoplastic material grips the outer circumference of the support arm 12 completely as a closed-wall system and thereby creates a tight unit. In addition, the features shown in
One way in which to form the carrier member 11 as an enclosure on the support arm 12 is to cast the carrier member 11 around the support arm 12 in the fixing area 31 using injection molding. The support arm 12 is inserted into the mold before the injection molding process is performed. The molding process can hereby take place without tension such that, after curing of the thermoplastic melt-processable section of the carrier member 11, the thermoplastic material attaches essentially free of tension around the circumference of the support arm 12.
The carrier member 11 is formed in the fastening region of the support arm 12 by molding a thermoplastic melt-processable material 41 around the support arm. The carrier member 11 can also be formed from other materials, such as a casting metal or a thermosetting plastic, fiber or fabric-reinforced synthetic resin or the like. The use of a thermoplastic melt-processable material is particularly advantageous because when the carrier member 11 is formed entirely of a thermoplastic melt-processable material, the carrier member can be formed in the desired shape and can be attached to the support arm 12 in a single working operation, for example by injection molding. If the carrier member is a two- or multi-part construction, it may have a thermoplastic melt-processable section that is mounted on an already shaped carrier member. The thermoplastic material 41 is then molded by an appropriate processing method to cover the support arm 12 in a closed-wall manner at least over the fixing area 31. For example, the two-part carrier member 11 can be made of aluminum or a similar suitable material, and a thermoplastic synthetic material can be molded to the aluminum and around the fixing area 31 of the support arm 12.
The enclosing or encapsulating of the support arm 12 by a part of the carrier member material also offers, along other benefits, the advantage that any irregularities in the shape or surface of the support arm are rendered unproblematic to achieving a good connection between the carrier member and the support arm because such irregularities in the encapsulation of the support arm are balanced or compensated by the material of the carrier member.
The present invention thereby provides a mirror carrier 10 with a carrier member 11 that is connected to a support arm 12 using a simple, cost-effective, corrosion resistant, vibration-resistant and reliable connection alternative to existing methods. The mirror carrier 10 itself attaches the image-forming device of the indirect vision system 13 to the vehicle 16 using a support member 11 molded to a support arm 12 that is fixed to the vehicle 16. Connection methods are required to mount the imaging device to the carrier member. The carrier member is formed, at least in the fixing area of the support arm, from a thermoplastic melt-processable material that encapsulates the support arm in a closed-wall manner.
10 mirror carrier
11 carrier member
12 support arm
13 indirect vision system
14 mirror glass
15 mirror housing
16 vehicle
17 connection point
18 cantilever
19 adjustment unit
20 contact point
21 gripping section
22 adapter
23 contact point on adapter
24 contact surface
25 contact point on angled surface
26 longitudinal axis of carrier
27 inclined contact surface
28 longitudinal axis through glass
29 cantilever
30 fixing point
31 fixing area
32 first embodiment of support arm
33 indentation
34 groove
35 second embodiment of support arm
36 opening
37 third embodiment of support arm
38 fourth embodiment of support arm
39 longitudinal groove
40 knurls or roughed grooves
41 thermoplastic material
42 rib
43 plate
44 base
45 screw
Although the present invention has been described in connection with certain specific embodiments for instructional purposes, the present invention is not limited thereto. Accordingly, various modifications, adaptations, and combinations of various features of the described embodiments can be practiced without departing from the scope of the invention as set forth in the claims.
Number | Date | Country | Kind |
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102014214128.1 | Jul 2014 | DE | national |
This application is based on and hereby claims the benefit under 35 U.S.C.§119 from German Patent Application No. DE 102014214128.1, filed on Jul. 21, 2014, in the German Patent Office. This application is a continuation-in-part of German Patent Application No. DE 102014214128.1, the contents of which are incorporated herein by reference.