WO2015168715A1 - Mobile handheld operating unit for an industrial controller - Google Patents

Abstract

The invention relates to a mobile handheld operating unit (1) for an industrial controller. In this case, a touch panel (9) for inputting data or commands is structurally superimposed on a display (7) for the software-controlled visualization of characters or graphics. A holding frame (12) for holding the display (7) and the touch panel (9) comprises a profiled holding element (13) and a structurally independent supporting element (14) which is in the form of a flat profile and the width of which is a multiple of the height thereof. In this case, the supporting element (14) in the form of a flat profile is oriented parallel to the display surface (8) of the display (7) and projects between the display (7) and the touch panel (9) in a tongue-like manner such that the supporting element holds the touch panel (9) by means of the first flat side (15) thereof and supports the display (7) by means of the opposite flat side (15') thereof inside a housing. A section (17) of the supporting element (14) in the form of a flat profile, which projects from circumferential edges (16) of the display (7) and of the touch panel (9), is held in position by means of the profiled holding element (13), with the result that the touch panel (9) is protected from deviation in the direction of the housing interior.

Description

 Mobile handheld terminal for industrial control

The invention relates to a mobile handheld terminal for industrial control, as set forth in claim 1.

WO 2003/001393 A2, which is assigned to the Applicant, describes a portable device with at least one optical output device for at least visualizing process data of a machine, a robot or a technical process, with at least one input device at least for influencing the operating functions of the device and / or for operating the machine or the robot or the technical process and with a safety switching device to prevent the delivery of unwanted, unforeseen control commands for the machine, the robot or the technical process. The output devices and input devices are connected to a control device, which is accommodated by a preferably unbreakable housing and has at least one communication interface to an external, locally distanced control device. Several of the input and output devices are functionally combined by a touch-sensitive screen in the manner of a touch screen, and the touch-sensitive screen extends over extensive areas of the surface of the housing. The described embodiments have proven themselves well in practice, but are relatively expensive to manufacture and thus relatively expensive.

DE 20 2012 102 329 U1, which is likewise based on the Applicant, discloses an embodiment of a mobile hand-held operating device for an industrial control, in which a two-part or multi-part housing is provided, which is defined by a first housing part which defines at least partial sections of the front side, and composed of at least one further housing part. The corresponding housing parts form in the assembled state, a cavity for receiving a plurality of electrical or electronic components. At least one display is provided for the software-controlled visualization of characters, graphics or colors. The at least one display is at least partially superimposed by a membrane keyboard, which membrane keypad is glued in its edge or peripheral portions with the first housing part and having a plurality of transparent or translucent executed input keys, so at least portions of visualizations on the underlying display are perceptible by an operator. In the first housing part a recessed relative to the housing front side receiving recess for receiving at least the display is formed, wherein a receiving depth of the receiving recess is dimensioned slightly larger than a height of the display. Between the bottom boundary surfaces of the receiving recess and the back of the display, or between wall-side boundary surfaces of the receiving recess and side surfaces of the display a viscous in the processing state, solidifying balancing mass is introduced, through which the display surface of the display is aligned and supported with respect to a reference plane of the first housing part , Thus, a high-quality handheld device can be created, which can be constructed as simple and inexpensive as possible despite high quality standards. However, the correspondingly proposed measures and designs are not suitable for all types and sizes of industrial manual control devices, in particular only for relatively small housing and display sizes practicable.

The present invention has for its object to provide a mobile control panel for industrial controls, which has a relatively large touch screen in relation to the housing and which still allows the most cost-effective provision, and provides a structure that meets high quality requirements ,

This object of the invention is solved by the features according to claim 1.

An advantage of the handheld terminal according to the invention is that its display and the display panel overlaid touch panel are supported in an improved manner and are positioned relative to the housing cutout in the front side of the housing. In particular, can be created by the structural or functional splitting of the support frame in a profile-shaped support member and in a structurally independent, flat profile-shaped support element, a cost-effective, yet high-quality handheld with relatively large display area. Due to the functional interaction of the holding element and the support element, these can fulfill the respectively intended functions or technical tasks in an optimized way. Among other things, by the flat profile-shaped support element, which tongue-like hineinerstreckt between the display and touch panel, the Occurrence of a parallax error can be minimized or obstructed. In addition, by a slight spacing between the display surface of the display and the display surface facing the flat side of the touch panel, the robustness or impactworthiness of the handheld device is increased. In particular, it is advantageous that the touch panel and the display can be held in a stable or reliable and load-transmitting manner by means of the flat profile-shaped carrying element in the direction perpendicular to the front side or display surface of the manual operating device relative to the housing. An advantage of the inventive measures is also that relative movements between the touch panel or the flat profile-shaped support member and the housing within the plane of the display surface are permitted to some extent, so that mechanical stresses between the housing or the housing cut and the touch panel are held back. In addition, injection-related or production-related dimensional tolerances of the housing, which can occur especially in the region of the housing cutout for inspection of the display, can be compensated or thus at least largely compensated. This is particularly advantageous if the housing is made of plastic and has been produced in a cost-optimized injection molding process.

According to the invention, a comparatively large handheld operating device with a relatively large touch screen can be created, which, among other things, can fulfill demanding visualization tasks in an improved manner. In addition, a relatively thin-walled and thus lightweight housing can be constructed of a soft or elastically yielding and thus break-resistant material. The requirements for ergonomics and the fall-ability of the handheld terminal are also favored. To compensate for manufacturing and temperature-induced distortion of the housing in the edge region of the display or touch screen and to protect the touch screen from deformation due to increased force or

Shock is inventively provided a relatively rigid, profile-shaped support frame in the interior of the housing, which supports both the housing and the display and keeps their deformation hinan. The result of the solution according to the invention is a visually appealing, yet sufficiently robust and comparatively lightweight handheld device.

Another advantage are the measures according to claim 2, as this is a possible delay of the housing in the front area, in particular in the section around the housing cutout can be well balanced or equalized for inspection on the display. Especially when the profile-shaped retaining element is sufficiently dimensionally stable or stable by its self-contained, one-piece mold, injection-related tolerances or distortions can be easily compensated or compensated up to a few millimeters. The corresponding dimensional accuracy is achieved above all by the interaction between the profile-shaped retaining element, the flat profile-shaped support element, the relatively torsion-resistant and dimensionally stable touch panel and the edge sections of the housing extending around the housing cutout. The increased rigidity of the profile-shaped retaining element contributes in any case to achieve an improved robustness or fall-ability of the mobile hand-held operating device.

Also advantageous are the measures according to claim 3, since a support element is thereby created, which has an increased torsional rigidity and thus is able to easily compensate tolerances of an injection-molded housing part, especially in the vicinity of the housing cut. An advantage of the alternative embodiment with individual strip-shaped strips affords the advantage of increased material savings or, as a result, the so-called material waste in the production of the flat-profile-shaped support element can be minimized. An advantage of the metallic material for the support element is that even with small material thicknesses a high stability or mechanical strength can be achieved, which can reliably absorb the forces acting on the touch panel. In particular, this also makes it possible to form a relatively thin-walled support element, which minimizes parallax errors between the touch panel and the display surface of the display. Also useful are the measures according to claim 4, as a particularly dimensionally accurate relative positioning between the flat profile-shaped support member and the plate-like touch panel can be achieved. In particular, in contrast to an adhesive bond by means of applied adhesive, a clean and high-precision assignment or mutual connection can be created. Depending on the material properties or thickness of the adhesive tape, it is also possible in a simple manner to provide a damping function or a function compensating for relative movements between the plate-shaped touch panel and the flat profile-shaped support element. As a result, the robustness or fall-ability of the mobile handheld terminal can be further promoted. Due to the advantageous measures according to claim 5, a relatively stiff, yet lightweight, profile-shaped retaining element is provided, which protects the display and the touch panel against bending loads, for example as a result of a fall, improved. The housing itself and the flat profile-shaped support element are in fact extremely bendable in the vertical direction to the display surface of the display. In addition, can be well corrected or at least partially equalized by the relatively rigid, profile-shaped holding element a delay of the fairly soft housing, which is due to injection molding technology and is difficult to avoid. Overall, therefore, a relatively rigid support frame for the touch screen, so for the display and the touch panel are created, the handheld device may have a relatively soft housing.

Also advantageous are the measures according to claim 6, since a structurally simple design is provided, which ensures reliable positioning of the display at the planned position relative to the housing cutout. In particular, a stable and reliable positioning of the display relative to the housing or housing cutout is thereby achieved with structurally simple means.

Also advantageous are the measures according to claim 7, since thereby the robustness or fall-ability of the handheld terminal can be further increased. In particular, the relatively fragile display whose sensitivity results, inter alia, from its relatively large extension and torsional sensitivity, can be well protected against damage. But are also advantageous the measures according to claim 8. In particular, the flat profile-shaped support member forms a relatively dimensionally accurate reference plane, which allows a possible torsion or tension-free mounting of the display. In addition, this possible tension or torsion-free storage is additionally improved by interposition of the at least one elastomeric damping element.

Of particular advantage are also the measures according to claim 9, as a possible, injection-related delay of the housing cutout or the housing by means of the fastening screws and the profile-shaped holding element well compensated or leveled can be. In particular, when the profile-shaped retaining element has a relatively high bending stiffness or a relatively high torsional rigidity, an injection-related distortion of the housing in the region of the housing cutout for the display can be largely eliminated. Moreover, it is advantageous that thereby the housing construction in the region of the holding frame or the housing cutout can be made relatively soft. This ensures that the housing can adapt to a relatively stiff, plan pulling support frame. A possible distortion of the housing, which can not be completely avoided for injection molding reasons, can thus be minimized by the relatively unyielding, profile-shaped holding frame.

In the measures according to claim 10, it is advantageous that a planar or substantially planar housing front can be created in which the housing surface merges steplessly or nearly steplessly onto the touch surface of the touch panel. An advantage of the bond between the front foil and the edge zones of the touch panel is that sealing elements between the touch panel and the housing can be dispensed with. This is especially true if the adhesive bond between the front foil and the touch panel is designed as a continuous, liquid-tight bond.

In the measures according to claim 11 it is advantageous that this bead-shaped embossing, which can be designed as indentation or bulge in the front foil, conceals manufacturing tolerances, minimizes a tensile load in the Z direction on the sensory film of the touch panel, that is tensile loads distributed in the direction of the input surface of the touch panel, compensates for movements in the event of shock and other stresses, and / or ensures a visually clean transition or progression with respect to the front view of the handheld control unit. In addition, this bead-shaped embossing in the form of a single or

Bulging, especially in the case of a touch panel according to the resistive principle, protects the so-called "forbidden area" or visually obscures it.This "forbidden area" absorbs electrotechnical elements, in particular plated-through holes, connections, and the like, which are relatively mechanically sensitive and are regarded as visually less advantageous.

Also advantageous are the measures according to claim 12, since thereby the robustness of the manual control device can be further increased. One particular advantage is that that heat-related Relativverschiebungen between the housing, which is made of plastic, and the touch panel, which is formed from different types of plastic or mineral glass, can be easily compensated. It is of particular advantage in this case that the touch panel is held reliably and permanently at the desired position primarily by the positioning effect of the front film, which is preferably peripherally bonded to the touch panel, and yet an absolutely rigid, fracture-resistant fixing of the touch panel is avoided.

By the measures according to claim 13, the support frame can correct an injection-related delay of the housing well. The distance between the profile-shaped retaining element and the flat profile-shaped support element ensures that these two components can move relative to each other. Due to the given degree of freedom in a plane parallel to the display or touch surface, different length expansions, which occur due to different coefficients of thermal expansion, pose no problem with regard to distortion or distortion. In particular, this spacing achieves a deadlock-free positioning of the flat profile-shaped support element. This is of particular use, above all in the case of a material mix made of plastic, glass-fiber-reinforced plastics and a metallic, flat profile-shaped support element. An appropriate positioning of the flat profile-shaped support member relative to the housing or the housing cutout can be accomplished by the measures of claim 14 in a simple manner. In particular, the flat profile-shaped carrier element and the components coupled thereto, such as the touch panel and the display, are thus positioned precisely and permanently, but are nevertheless held in a floating manner with respect to the surrounding housing cutouts. This especially with respect to relative movements within the display or input surface.

The measures according to claim 15 are also advantageous, since the housing can be made of plastic and the flat profile-shaped support element can be made of metal without a critical tension or a delay between the named components occurring due to different thermal expansion coefficients. In particular, this takes into account the fact that at a temperature difference of about 60 ° between the flat profile-shaped support member and the plastic of Housing may occur in relation to the typical component dimensions and material sizes a change in length or a difference in length of up to 1.3 mm, this caused by the measures specified no serious tension or deformation.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

In each case, in a highly simplified, schematic representation:

1 shows an embodiment of a mobile handheld control device for control applications in view of the housing front side.

2 shows a partial section through the housing of the mobile handheld terminal according to the lines II-II in Fig. 1.

3 shows an embodiment of the flat profile-shaped support element for the touch panel and the display of the mobile hand-held operating device in plan view;

4 shows a partial section through the housing of the mobile handheld terminal;

5 shows an enlarged detail in the region of the holding frame for the display and the touch panel of the mobile handheld terminal;

Fig. 6 shows a further partial section through the housing of the mobile handheld terminal.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the position information selected in the description, such as top, bottom, side, etc. are related to the immediately described and illustrated figure and are to transmit this information in case of a change of position mutatis mutandis to the new situation. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

In Fig. 1, an embodiment of an inventively constructed, electro-technical hand-held operating device 1 is illustrated. Such a handheld terminal 1 is dimensioned in terms of its size or weight so that it is mobile or portable so as to be easily spent by an operator to various locations and can be easily moved to varying positions of use. This mobile, electro-technical hand-held operating device 1 represents a functional component of an industrial control, in particular a machine or robot control. The hand-held operating device 1 serves at least to observe and / or influence operating states or processes of the industrial control or a corresponding control - system. In addition to operating or monitoring functions, this mobile handheld terminal 1 can also be provided for programming control sequences.

The handheld terminal 1 can be connected via at least one data communications interface 2 to a corresponding, data communications interface of an industrial controller (not shown). The data technology coupling between the handheld terminal 1 and the corresponding industrial control can - as shown in Fig. 1 - be performed wired or wired, or even wirelessly, in particular radio technology to be implemented, as is already known from the prior art , A housing 3 of the control-engineering, mobile handheld terminal 1 is at least two or more parts executed, as was exemplified in Fig. 2. The housing 3 thus comprises a first housing part 4 and at least one further housing part 5. The housing parts 4, 5 form in the assembled state according to plan a cavity, which is provided for receiving a plurality of respectively required electrical or electronic components. Preferably, the housing parts 4, 5 by

Injection molded steep plastic. The first housing part 4 defines at least partial sections of the front side or a front side 6 of the housing 2. At least one of the housing parts 4, 5 is designed shell-shaped. For this purpose, this has an approximately plate-shaped Base element formed on the peripheral portions webs or integrally formed on the base element wall elements.

As is further best seen from a synopsis of FIGS. 1 to 6, the mobile, control-related manual control unit 1 has at least one display 7 with a display area 8 for the software-controlled visualization of characters, graphics or colors. The display 7, which may be designed as an LCD display, further serves for the visualization of control-technical states or operating data of the machine to be operated or of an industrial robot.

The display 7 defining a display surface 8 is structurally superimposed on a touch panel 9 for data or command input. In order for the display contents of the display 7 to be perceived by a user, this touch panel 9 is, as is known, transparent or translucent. The touch panel 9 can be designed according to the resistive, piezoelectric or capacitive effect principle and serves primarily for sensory detection of actuation points or actuation surfaces within its touch-sensitive input surface 10 and thus for detecting manual inputs or control commands. The display surface 8 of the display 7 and the input surface 10 of the touch panel 9 are thus layered one above the other. The touch panel 9 and the display 7 below define a so-called touch screen.

The display 7 and the touch panel 9 are held in relation to a recess or a housing cutout 11 in the front side 6 of the housing 3. This holder and positioning is decisively accomplished by a holding frame 12 accommodated inside the housing, which is designed to maintain the position of the display 7 and the touch panel 9 in accordance with the plan relative to the recess or relative to the housing cutout 11. In particular, this holding frame 12 prevents the touch screen, in particular the touch panel 9 and the display 7, from falling off or divergence in the direction of the housing interior or in the direction of the housing bottom, as best seen in FIG. 2.

According to the invention, this holding frame 12 is designed to be multi-part for the positioning or mounting of the display 7 and the touch panel 9, in particular composed of several structurally separately designed elements. In this case, the holding frame 12 comprises on the one hand a profile Shaped profile is to be understood that the cross section of the holding element 13 has a similar or approximately equal cross-sectional width and cross-sectional height. In particular, square or approximately square cross-sectional shapes of the holding element 13 are to be understood as "profile-shaped." Its height-to-width ratio can be between 1: 1 to 4: 1. By contrast, the flat profile-shaped carrying element 14 is designed such that its cross-sectional width Accordingly, the width-to-height ratio of the flat-profile support element 14 is greater than 4, in particular it may be in a range between Accordingly, the flat profile-shaped support member 14 is to be understood as a strip-shaped element, while the holding member 13 is to be understood as a profile body, which has approximately the same or similar cross-sectional dimensions and thus in Within its cross-sectional plane, it may have similar bending resistance. Consequently, the flat profile-shaped support member 14 has in relation to its cross-sectional plane parallel to the width direction of a significantly higher bending resistance, as in the direction parallel to its vertical extent. It is essential that the flat profile-shaped support member 14 has a perpendicular to the display surface 8 of the display 7 measured height or thickness, which is only a fraction, in particular less than 50% of the measured perpendicular to the display surface 8 height of the profile-shaped holding element 13. The flat profile-shaped support element 14 is aligned parallel to the display surface 8 of the display 7. This means that the two flat sides 15, 15 'of the support element 14 extend parallel to the display surface 8 and thus also parallel to the input surface 10 of the touch panel 9. The flat profile-shaped support member 14 protrudes tongue-like between the display 7 and touch panel 9 inside. Accordingly, the display 7 and the touch panel 9 are spaced apart by about the thickness or height of the flat profile-shaped support member 14 to each other. The tongue-like between the display 7 and touch panel 9 protruding portion of the flat profile-shaped support member 14 is designed such that it holds the touch panel 9 by means of a first flat side 15. By means of the opposite, housing-internal flat side 15 ' supports the flat profile-shaped support member 14 at the same time from the display 7, as best seen in Fig. 2 or Fig. 6 can be seen.

At the same time, a section 17 of the flat profile-shaped support element 14 projecting from the peripheral edges 16 of the display 7 and the touch panel 9 is positioned by means of the profile-shaped retaining element 13 in such a manner that the touch panel 9 prevents it from deviating in the direction of the housing interior Direction to the case back is secured.

It is expedient here if the profile-shaped retaining element 13 is embodied as a one-piece self-contained, in particular ring-shaped, injection-molded part. The circumferential course of this injection molded part can essentially correspond to the circumferential contour of the housing cutout 11. In particular, its inside clearances can correspond approximately to the clear dimensions of the housing cutout 11. Especially when the housing construction in the region of the holding frame 12 is made relatively soft or yielding, this can offer significant benefits. In particular, it can be achieved that the housing 3 can be adapted to the relatively stiff and planar or planar acting holding frame 12, that is, in particular to its profile-shaped holding element 13. A physical distortion of the housing 3, which can not be completely avoided for injection molding reasons, can thus be minimized or reduced. In particular, in the covering area between the holding frame 12 and the housing cutout 11, increased passbzw. Dimensional accuracy achieved. This is especially true if the dimensional stability of the holding element 13 or of the overall holding frame 12 is comparatively high. This comparison relates to the dimensional stability of the housing 3 in the vicinity of the housing cutout 11 or on the housing webs around the housing cutout 11.

The flat profile-shaped support element 14 is preferably made of metal, in particular of light metal. For example, the support element 14 may comprise aluminum, magnesium, or a combination of materials of light metals. A flat profile-shaped support element 14 made of metal or light metal is therefore particularly expedient, since relatively high strengths or stiffnesses can be achieved even with low material thicknesses or with small strip thicknesses. According to a first embodiment, the flat profile-shaped support member 14 may be formed by a one-piece, at least approximately rectangular plate made of metal, wherein the center region is released or released is cut to make the display surface 8 of the display 7 visible. In this case, the flat profile-shaped support member 14 in a view perpendicular to the display surface 8 is designed like a frame or rectangular. As an alternative to such a frame-like carrying element 14, as shown in solid lines in FIG. 3, it is also possible to provide a plurality of rectangular strips 18, 19 of metal, as indicated in FIG. 3 by dashed lines. It is essential that the frame-shaped support member 14 has a central, rectangular opening, the size of which corresponds approximately to the size of the display surface 8 of the display 7. The handheld terminal 1 is due to the relatively large touch screen, that is, by the relatively large display 7 and touch panel 9, well suited for detailed visualizations in the course of maintenance s work on large-scale industrial facilities. Typically, the touch screen has a diagonal of more than 6 ", wherein the touch screen can also occupy more than 50% of the area of the front side 6 of the housing 3. The surface of the front side 6 of the housing 3 can surface dimensions in size a sheet in the format DIN A5 to DIN A4 and also larger.

As best seen in FIGS. 4 and 6, the touch panel 9 can be connected at least in sections to the flat profile-shaped support element 14 in its outer edge zone delimiting the touch-sensitive input surface 10 by means of a double-sided adhesive tape 20. In particular, this double-sided adhesive tape 20 ensures a cohesive connection between the touch panel 9 and the flat profile-shaped support element 14. Such an adhesive tape 20 is preferable to a pasty adhesive layer to be formed, although in principle, the adhesive connection by means of such an adhesive layer is conceivable.

As best seen in FIGS. 2 and 6, it may be expedient for the profiled support element 13 to have one or more wall webs 21, 2 'extending at least approximately perpendicularly to the display surface 8 of the display 7, which increase the rigidity of the product. filförmigen holding element 13 with respect to deflections in the vertical direction to

Increase display area 8 of the display 7 and / or increase the torsional rigidity of the profile-shaped holding element 13. According to the example, the profile-shaped holding element 13 is formed in cross-section U-shaped, wherein it is also possible, an L-shaped, rectangular or triangular cross-sectional contour and thus to define the at least one wall web 21, 2 Γ.

According to an expedient embodiment, the display 7 can be secured by means of at least one wall web 21 on the profile-shaped holding element 13 against shifts parallel to the display surface 8, as best seen in FIGS. 4 and 6. In particular, this can be provided on the profile-shaped holding element 13 at least one at least approximately perpendicular to the display surface 8 of the display 7 extending wall web 21. The side or wall surfaces of the display 7 are secured by this at least one wall web 21 from undesired displacement. According to an expedient measure, the display 7 is supported with the interposition of at least one elastomeric damping element 22 with respect to the wall web 21 of the profile-shaped retaining element 13. Alternatively or in combination, it can be provided that the display 7 is supported in a load-transmitting manner with the interposition of at least one elastomeric damping element 23 on the flat-profile support element 14, as is best seen in FIGS. 4 and 6.

As best seen in FIG. 2, it is expedient in terms of construction and overall construction if the profile-shaped retaining element 13 is anchored to the first housing part 4 by means of a plurality of fastening screws 24 distributed over its longitudinal extent, which are anchored in perpendicular to the display surface 8 Schraubdomen , Is connected to the first housing part 4. In particular, the retaining element 13 is thereby screwed or screwed to the first housing part 4 defining the front side 6. This plurality of screw domes 25 is in this case formed on the inside of the housing facing the inside of the housing part 4.

As best seen in FIGS. 4 and 6, the hand-held operating device 1 may have a front foil 26. This front sheet 26 is glued on the one hand to the front side 6 of the first housing part 4. In particular, the front foil 26 extends from the plastic of the first housing part 4, with which it is glued, via the transition section 27 between the first housing part 4 and the touch panel 9. In particular, the front foil 26 bridges this transition section 27. At the same time, the front foil 26 glued to edge zones 28 of the touch panel 9 with the touch panel 9. The bonding in the peripheral edge zones 28 of the touch panel 9 is preferably designed to be continuous or continuous to ensure a seal between the viewing surface and the input surface 10 and the housing interior. A thickness 29 of the front sheet 26 in the region of the edge zone 28, that is to say directly on the touch panel 9, is preferably less than 1.0 mm, in particular approximately 0.2 mm. As a result, it is possible to provide a housing front that is as planar or flat as possible, in particular a relatively continuous front panel on the handheld terminal 1. This favors the sensitivity to touch, the ease of cleaning, the visibility on the display 7 and the visual appearance of the handheld terminal 1.

In the overlapping section with the housing 3, this front sheet 26 can form a so-called membrane keyboard 30 or merge into a membrane keyboard 30, which membrane keyboard 30 at least one electromechanical switching or actuating element 30 ', for example in the form of a button, which preferably comprises a tactile actuation Feedback offers.

According to an expedient embodiment, it is provided that the front foil 26 has a bead-shaped embossment 31 in the region of the transition section 27, preferably directly in overlap with the transition section 27. This embossment 31 or bead within the front foil 26 can be embodied as a recess or bulge of the material of the front foil 26. As shown in FIG. 4, this bead-shaped embossment 31 is defined by a bulge of the front sheet 26 with respect to the surrounding surfaces of the front sheet 26. This contoured or bead-shaped embossment 31 serves to compensate or to enable relative displacements, to compensate for tolerances in the transition section 27 between the touch panel 9 and the housing part 4, and / or for optical demarcation of the various surfaces or partial sections of the Handheld terminal 1.

Another purpose of the front foil 26 adhesively bonded to the housing part 4 and the touch panel 9 is that the front foil 26, in cooperation with the flat profile-shaped support element 14, prevents undesired displacements in the plane of the display surface 8 or 8 ., the input surface 10 secures. In particular, the front foil 26 causes an elastically yielding and resetting against the housing 3 when impact loads occurring parallel or substantially parallel to the plane of the display surface 8 occur. Accordingly, the touch panel 9 is also positioned by the bond with the front sheet 26 with respect to the housing cutout 11.

It is expedient here too if the profile-shaped retaining element 13 in the assembled state is at a distance 32 of less than 0.2 mm, in particular less than 0.1 mm, preferably approximately 0.05 mm, distanced from the flat profile-shaped support element 14, as was indicated schematically in Fig. 6. As a result, it is possible for the section 17 of the flat profile-shaped support element 14 projecting from the display 7 or from the touch panel 9 to be positioned relative to the housing 3 or relative to the housing part 4 in a relatively non-clamping manner. As a result, temperature-related length expansions or dimensional changes between the flat profile-shaped support element 14 and the housing 3 with respect to the plane of the display surface 8 of the display 7 or referring to the plane of the input surface 10 can be compensated for in an improved manner, without mutual, mechanical tension, structural distortions and this may result in resulting uses.

As best seen in Fig. 3 it can be seen, the flat profile-shaped support member 14 may have at least one opening 33, 34, which openings 33, 34 each of a screw dome 25 - Fig. 2 - are interspersed. The corresponding screw dome 25 is provided for anchoring a fastening screw 24 for the profile-shaped retaining element 13. 3, it is expedient if the at least one opening 33, 34 is designed as a slot or dimensioned such that temperature-induced thermal expansion and relative displacements between the flat profile-shaped support member 14 and the housing 3 in the plane of the display surface 8 of the display 7 are comparable. As best seen in a combination of FIGS. 3 and 4, the exemplary frame-like support member 14 via at least two Schraubdome 25 and thus corresponding openings 33, 34 positioned relative to the housing cutout 11 that an undesirable deviation or positional shift is held back , but nevertheless temperature-induced, different thermal expansions between the flat profile-shaped support member 14 and the housing 3 via these openings 33, 34 can be compensated. All statements on ranges of values in objective description are to be understood as including any and all sub-ranges thereof, eg the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10 ie, all sub-regions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, eg, 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

The exemplary embodiments show possible embodiments of the mobile handheld terminal 1, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments of the same, but rather also various combinations of the individual embodiments are possible with each other and this variation possibility due to the teaching of technical action by objective invention in the skill of working in this technical field expert. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.

For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the handheld terminal 1, this or its components have been shown partially unevenly and / or enlarged and / or reduced in size.

The task underlying the independent inventive solutions can be taken from the description. Above all, the individual embodiments shown in FIGS. 1 to 6 can form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures. REFERENCE NUMBERS

Handheld terminal

 Communication Interface

 casing

 housing part

 housing part

front

 display

 display area

 Touch panel

 Input surface housing cutout

 holding frame

 retaining element

 supporting member

, 15 'flat side peripheral edge

 section

 strip

 strip

 Adhesive tape, 21 'wall bridge

 damping element

 damping element

 fixing screw

 Schraubdom front foil

 Transition section

 border zone

 thickness

 Slides keyboard

'Actuator embossing

 distance

 breakthrough

 breakthrough

Claims

Patent claims 1. Mobile handheld terminal (1) for an industrial control, comprising a two- or multi-part housing (3), which comprises a first housing part (4) and at least one further housing part (5), wherein the first housing part (4) at least Subsections of the front (6) of the handheld terminal (1) and the individual housing parts (4, 5) in the assembled state form a cavity for receiving a plurality of electrotechnical or electronic components, a display surface (8) defining display (7) for the software-controlled visualization of characters or graphics, a display (7) structurally superimposed, transparent or translucent executed touch panel (9) for data or command input, and with a housing inside recorded holding frame (12) for positioning of display (7) and touch panel (9) relative to a recess or a housing cutout (11) in the front side (6) of the housing (3), characterized in that the holding frame (12) has a profile-shaped holding element (13) and a structurally independently embodied, flat profile-shaped support element (14) whose width is a multiple of its height, wherein the flat profile-shaped support member (14) is aligned parallel to the display surface (8) and protrudes like a tongue between the display (7) and touch panel (9), that it holds the touch panel (9) by means of its first flat side (15) and the display (7) a by means of its opposite flat side (15 ') inside the housing supported, and that one of peripheral edges (16) of the display (7) and the touch panel (9) projecting portion (17) of the flat profile-shaped support member (14) is positioned by means of the profile-shaped support member (13), so that the touch panel (9) is secured against a deviation in the direction of the housing interior. 2. Handheld operating device according to claim 1, characterized in that the profile-shaped holding element (13) is formed as a one-piece, annular self-contained injection molded part, whose circumference s course substantially corresponds to the peripheral contour of the housing cutout (11) and whose inside clearances approximately the clear Dimensions of the housing cutout (11) correspond. 3. Handheld terminal according to claim 1 or 2, characterized in that flat profile-shaped support element (14) by a one-piece, at least approximately rectangular plate Metal with a rectangular opening in approximately the size of the display surface (8), or by a plurality of rectangular strung together strips (18, 19) made of metal. 4. Handheld terminal according to one of the preceding claims, marked thereby, that the touch panel (9) in its outer, the touch-sensitive input surface (10) bounding edge zone (28) by means of a double-sided adhesive tape (20) with the flat-profile-shaped support member (14) is connected. 5. Hand-held operating device according to one of the preceding claims, characterized marked, that the profile-shaped holding element (13) one or more at least approximately perpendicular to the display surface (8) of the display (7) extending wall webs (21, 2Γ), which the rigidity of increase profile-shaped holding element (13) with respect to deflections in the vertical direction to the display surface (8) of the display (7) and / or increase the use s rigidity of the profile-shaped holding element (13). 6. Handheld terminal according to one of the preceding claims, characterized in that the profile-shaped holding element (13) at least one at least approximately perpendicular to the display surface (8) of the display (7) extending wall web (21) is formed with which the display (7) Shifts parallel to the display surface (8) is secured. 7. Handheld terminal according to claim 6, characterized in that the display (7) with the interposition of at least one elastomeric damping element (22) relative to the wall web (21) of the profile-shaped retaining element (13) is supported. 8. Handheld terminal according to one of the preceding claims, characterized in that the display (7) with the interposition of at least one elastomeric damping element (23) on the flat profile-shaped support element (14) is supported load-transmitting. 9. Handheld terminal according to one of the preceding claims, characterized marked, that the profile-shaped retaining element (13) by means of several, distributed over the longitudinal extent fixing screws (24) which perpendicular to the display surface (8) aligned Schraubdomen (25) on the first housing part ( 4) are anchored to the first housing part (4) is connected. 10. Handheld terminal according to one of the preceding claims, characterized in that a front foil (26) is formed, which is glued to the front side (6) of the first housing part (4), a transition section (27) between the first housing part (4) and bridged the touch panel (9) and further glued to the edge zones (28) of the touch panel (9) with the touch panel (9). 11. A hand-held operating device according to claim 10, characterized in that the front film (26) in the region of the transition section (27) has a bead-shaped embossment (31) in the form of a recess or indentation. 12. A hand-held operating device according to claim 10 or 11, characterized in that the touch panel (9) together with the flat profile-shaped support member (14) by means of the front foil (26) secured against unwanted displacements in the plane of the display surface (8) and the occurrence of shock loads relative to the housing (3) in the plane of the display surface (8) elastically yielding and resiliently supported. 13. Handheld terminal according to one of the preceding claims, characterized in that the profile-shaped holding element (13) in the mounted state at a distance (32) of less than 0.2 mm, in particular less than 0.1 mm, preferably about 0.05 mm is distanced from the flat profile-shaped support element (14), so that from the touch panel (9) or from the display (7) projecting portion (17) of the flat profile-shaped support member (14) is positioned without jamming and temperature-related length expansions or dimensional changes between the flat profile-shaped support member (14 ) and the housing (3) in the plane of the display surface (8) of the display (7) are compensated. 14. Handheld terminal according to one of the preceding claims, characterized in that the flat profile-shaped support element (14) has at least one opening (33, 34), each of a screw dome (25) for anchoring a fastening screw (24) for the profile-shaped retaining element (13) is interspersed. 15. Handheld terminal according to claim 14, characterized in that the at least one opening (33, 34) is designed as a slot or is dimensioned such that tem- temperature-related thermal expansions and relative displacements between the profiled support element (14) and the housing (3) in the plane of the display surface (8) of the display (7) can be compensated.