Modular unit with door

Abstract

A modular door unit (100) which is configured to be connectable to a modular construction, such as a stand at a trade fair, wherein the door unit comprises a door panel (110) and a frame (120), wherein the door panel is connected rotatably to the frame so that the door panel is rotatable between at least one open position and a closed position, wherein access through the door unit is allowed in the at least one open position and access through the door unit is impeded in the closed position, wherein the door unit further comprises at least one fastening means (130) which is connected to the frame and is configured to connect the frame releasably to the modular construction so that the door unit is mountable and demountable in the modular construction, wherein the door unit further comprises a handle (140) with at least one engaging element (141), wherein the handle (140) is displaceable between a first position and a second position.

Description

Field of the invention

[0001] The present invention relates to the field of modular constructions, and more particularly to techniques for designing and integrating modular door units which are mountable and demountable in such constructions.Background

[0002] Modular constructions are becoming increasingly popular for applications such as exhibition stands, advertising structures and stages in the entertainment industry. These constructions are designed to be constructed and dismantled in rapid and simple manner, this being of crucial importance in dynamic environments where time and efficiency are important. In addition, modular constructions provide the advantage that they can be transported compactly and are light-weight, this significantly simplifying the logistical process.

[0003] A significant feature of modular constructions is their versatility and flexibility. They make use of sets of parts which are able to construct different shapes and sizes of construction. Modularity requires the parts to be complementary, expandable and interchangeable, whereby a wide range of construction shapes and dimensions is possible with a limited number of unique components.

[0004] Integrating, mounting and demounting doors within these modular constructions is however often time-consuming and labour-intensive. The process moreover requires a considerable number of different components, which can be easily lost. This hampers the convenience of use and reduces the efficiency of the construction process of such constructions.

[0005] US200802222980 describes a door hanger and a method for use thereof. US10871025 describes a two-in-one door hanging profile. GB2388147 describes a method for manufacturing a door and a frame, a door and frame manufactured thereby. US2730773 describes a door unit with a split jamb system.Summary of the invention

[0006] Embodiments of the invention have for their object to provide a solution which simplifies integration, mounting and demounting and transport of doors in modular constructions by reducing the number of unique components required and making the process less time-consuming.

[0007] According to a first aspect, a modular door unit is provided which is configured to be connectable to a modular construction, such as a stand at a trade fair, wherein the door unit comprises a door panel and a frame, wherein the door panel is connected rotatably to the frame so that the door panel is rotatable between at least one open position and a closed position, wherein access through the door unit is allowed in the at least one open position and access through the door unit is impeded in the closed position, wherein the door unit further comprises at least one fastening means which is connected to the frame and is configured to connect the frame releasably to the modular construction so that the door unit is mountable and demountable in the modular construction, wherein the door unit further comprises a handle with at least one engaging element, wherein the handle is displaceable between a first position and a second position, wherein a user can rotate the door panel between the at least one open and closed position, and in the second position the handle is positioned such that the door unit is stackable on or against at least one further door unit.

[0008] The modular door unit provides considerable advantages in that the door panel is connected rotatably to the frame. This makes it possible to allow or impede access quickly and efficiently. The presence of at least one fastening means which is releasable ensures that the door unit is mountable and demountable in simple manner, whereby time is saved and loss of components is reduced. The handle with engaging elements, which can be displaced between positions, enables a user to rotate the door panel in simple manner and contributes to the modularity with the option of stacking against other door units, this optimizing the transport efficiency and storage space.

[0009] Advantages of the further exemplary embodiments described below are described in the detailed figure description.

[0010] In the first position the at least one engaging element preferably extends away from the door panel.

[0011] In the first position the at least one engaging element preferably extends substantially perpendicularly relative to the door panel.

[0012] In the first position the at least one engaging element preferably extends at a non-zero angle relative to the door panel. The non-zero angle is preferably an acute angle. The acute angle more preferably lies in the range of 0° to 90°.

[0013] In the second position the at least one engaging element preferably lies substantially parallel to the door panel.

[0014] In the second position a maximum distance measured between the at least one engaging element and the door panel is preferably limited, the maximum distance preferably being smaller than 1 cm. The maximum distance is preferably measured between a wall surface of the at least one engaging element lying furthest away from the door panel and a wall surface of the door panel lying adjacently of the at least one engaging element.

[0015] The handle preferably further comprises a base which is connected to the at least one engaging element, which base is oriented at a non-zero angle relative to the at least one engaging element and is configured to strike against an end edge of the door panel.

[0016] The handle preferably comprises a displacing means which is configured to displace the handle between the first position and the second position. The displacing means is more preferably connected rotatably to the door panel so that it is rotatable between the first position and the second position. More preferably, the handle is mounted on a distal outer end of the displacing means and the displacing means is configured to position the handle at a first distance and a second distance relative to an end edge of the door panel so that, at the first distance, the handle strikes substantially against the end edge of the door panel and, at the second distance, the handle is displaceable between the first position and the second position.

[0017] The base of the handle is preferably connected to the displacing means.

[0018] The base preferably extends in a longitudinal and a lateral direction, wherein a third distance between two opposite longitudinal peripheral edges of the base corresponds at most with a depth dimension of the door panel measured along the end edge thereof, wherein the second distance is preferably smaller than the depth dimension of the door panel.

[0019] The at least one engaging element is preferably connected to the base at the position of a peripheral edge of the base.

[0020] The at least one engaging element is preferably formed integrally with the base.

[0021] The at least one engaging element is preferably connected to the base at the position of two intersecting peripheral edges, wherein the at least one engaging element preferably comprises a connection to the base which extends only partially along one peripheral edge of the two intersecting peripheral edges.

[0022] A fourth distance between a lateral edge of the base and an edge of the at least one engaging element is preferably at least as great as, and preferably greater than, a depth dimension of the door panel measured along the end edge thereof.

[0023] The at least one fastening means is preferably mounted movably in the frame so that the at least one fastening means is movable between a retracted position and an extended position, wherein in the retracted position the at least one fastening means is retracted substantially wholly into the frame, preferably retracted wholly into the frame, and wherein in the extended position the at least one fastening means extends through the frame in order to fasten the frame to an adjacent modular construction.

[0024] The door unit preferably further comprises a sleeve which is mounted on a first peripheral wall of the frame and wherein the at least one fastening means is mounted movably in the sleeve.

[0025] The door unit preferably further comprises a springy element which is configured to push the at least one fastening means to the retracted position.

[0026] The at least one fastening means is preferably integrated in the frame.

[0027] The door unit preferably further comprises a doorstop with a stop, wherein the doorstop is connected rotatably to one of the frame and the door panel so that the stop can be positioned in at least one first stop position and a passage position, wherein in the at least one first stop position the stop impedes the door panel from rotating beyond the frame, and in the passage position the stop allows the door panel to rotate freely along the frame. The doorstop can preferably further be positioned in at least one second stop position, wherein in the first stop position the stop lies adjacently of a first peripheral wall of the frame and in the second stop position the stop lies adjacently of a second peripheral wall of the frame lying opposite the first peripheral wall.

[0028] In the passage position the stop is preferably positioned such that the door panel is rotatable above or below the stop.

[0029] The doorstop is preferably mounted in an upper or a lower segment of the frame.

[0030] The doorstop is preferably mounted on a wall of the frame which is directed toward the door panel. The door panel preferably comprises a door panel frame which is formed from profiles, wherein the profiles bound a space in which a cloth or plate material is attachable.

[0031] The profiles preferably comprise a cloth and / or plate attaching means which is configured to fix the cloth or plate material.

[0032] The door unit preferably comprises a cloth or plate material.

[0033] The door unit preferably comprises a locking means with a rotatable locking plate which is rotatable between a releasing position and a locking position, wherein in the releasing position the door panel is free to rotate in the frame and in the locking position the door panel is locked relative to the frame.

[0034] The locking means is preferably integrated in at least one of the frame and the door panel.

[0035] When the locking means is integrated in the frame, the door panel preferably comprises a recess in which the locking plate is accommodated in the locking position in order to lock the door panel.

[0036] When the locking means is integrated in the door panel, the frame preferably comprises a recess in which the locking plate is accommodated in the locking position in order to lock the door panel.

[0037] The recess is preferably an elongate recess, wherein the outer ends of the recess are wider than a middle segment of the recess.

[0038] According to a further aspect, a modular construction comprising a modular door unit as described above and an exhibition stand frame or tile elements is provided.Clauses

[0039] 1. A modular door unit (100) which is configured to be connectable to a modular construction, such as a stand at a trade fair, wherein the door unit comprises a door panel (110) and a frame (120), wherein the door panel is connected rotatably to the frame so that the door panel is rotatable between at least one open position and a closed position, wherein access through the door unit is allowed in the at least one open position and access through the door unit is impeded in the closed position, wherein the door unit further comprises at least one fastening means (130) which is connected to the frame and is configured to connect the frame releasably to the modular construction so that the door unit is mountable and demountable in the modular construction, wherein the door unit further comprises a handle (140) with at least one engaging element (141), wherein the handle (140) is displaceable between a first position and a second position, wherein a user can rotate the door panel between the at least one open and closed position, and in the second position the handle is positioned such that the door unit is stackable on or against at least one further door unit. 2. The door unit according to the foregoing clause, wherein in the first position the at least one engaging element (141) extends away from the door panel. 3. The door unit according to any one of the foregoing clauses, wherein in the first position the at least one engaging element (141) extends substantially perpendicularly relative to the door panel. 4. The door unit according to any one of the foregoing clauses, wherein in the second position the at least one engaging element (141) lies substantially parallel to the door panel. 5. The door unit according to the foregoing clause, wherein in the second position a maximum distance measured between the at least one engaging element (141) and the door panel is limited, the distance preferably being smaller than 1 cm. 6. The door unit according to any one of the foregoing clauses 4-5, wherein the maximum distance is measured between a wall surface of the at least one engaging element lying furthest away from the door panel and a wall surface of the door panel lying adjacently of the at least one engaging element. 7. The door unit according to any one of the foregoing clauses, wherein the handle (140) further comprises a base (142) which is connected to the at least one engaging element, which base (142) is oriented at a non-zero angle relative to the at least one engaging element and is configured to strike against an end edge of the door panel. 8. The door unit according to any one of the foregoing clauses, wherein the handle (140) comprises a displacing means (143) which is configured to displace the handle between the first position and the second position. 9. The door unit according to the foregoing clause, wherein the displacing means (143) is connected rotatably to the door panel so that it is rotatable between the first position and the second position. 10. The door unit according to any one of the foregoing clauses 8-9, wherein the handle is mounted on a distal outer end of the displacing means (143) and wherein the displacing means is configured to position the handle at a first distance and a second distance relative to an end edge of the door panel so that, at the first distance, the handle strikes substantially against the end edge of the door panel and, at the second distance, the handle is displaceable between the first position and the second position. 11. The door unit according to clause 7 and any one of the clauses 8-10, wherein the base (142) of the handle is connected to the displacing means. 12. The door unit according to clause 7, wherein the base extends in a longitudinal and a lateral direction, wherein a third distance (146) between two opposite longitudinal peripheral edges (145a, 145b) of the base corresponds at most with a depth dimension of the door panel measured along the end edge thereof, wherein the second distance is preferably smaller than the depth dimension of the door panel. 13. The door unit according to clause 7 and any one of the clauses 8-12, wherein the at least one engaging element (141, 141a, 141b) is connected to the base at the position of a peripheral edge (145a, 145b) of the base. 14. The door unit according to the foregoing clause, wherein the at least one engaging element is formed integrally with the base. 15. The door unit according to any one of the foregoing clauses 11-14, wherein the at least one engaging element is connected to the base at the position of two intersecting peripheral edges (144b, 145a; 145b, 144a), wherein the at least one engaging element preferably comprises a connection to the base which extends only partially along one (145a) peripheral edge of the two intersecting peripheral edges (144b, 145a; 145b, 144a). 16. The door unit according to any one of the foregoing clauses and clause 7, wherein a fourth distance (148) between a lateral edge (144a) of the base and an edge (148) of the at least one engaging element (141a) is at least as great as, and preferably greater than, a depth dimension of the door panel measured along the end edge thereof. 17. The door unit according to any one of the foregoing clauses, wherein the at least one fastening means (130) is mounted movably in the frame (120) so that the at least one fastening means (130) is movable between a retracted position and an extended position, wherein in the retracted position the at least one fastening means is retracted substantially wholly into the frame (120), preferably retracted wholly into the frame, and wherein in the extended position the at least one fastening means extends through the frame in order to fasten the frame to an adjacent modular construction. 18. The door unit according to the foregoing clause, further comprising a sleeve (131) which is mounted on a first peripheral wall of the frame and wherein the at least one fastening means is mounted movably in the sleeve. 19. The door unit according to the foregoing clause, further comprising a springy element (132) which is configured to push the at least one fastening means to the retracted position. 20. The door unit according to any one of the foregoing clauses 17-19, wherein the at least one fastening means (130) is integrated in the frame. 21. The door unit according to any one of the foregoing clauses, further comprising a doorstop (150) with a stop, wherein the doorstop is connected rotatably to one of the frame and the door panel so that the stop can be positioned in at least one first stop position and a passage position, wherein in the at least one first stop position the stop impedes the door panel from rotating beyond the frame, and in the passage position the stop allows the door panel to rotate freely along the frame. 22. The door unit according to the foregoing clause, wherein the doorstop can further be positioned in at least one second stop position, wherein in the first stop position the stop lies adjacently of a first peripheral wall (121) of the frame and in the second stop position the stop lies adjacently of a second peripheral wall (122) of the frame (120) lying opposite the first peripheral wall. 23. The door unit according to any one of the foregoing clauses 21-22, wherein in the passage position the stop is positioned such that the door panel is rotatable above or below the stop. 24. The door unit according to any one of the foregoing clauses 21-23, wherein the doorstop is mounted in an upper or a lower segment of the frame. 25. The door unit according to any one of the foregoing clauses 21-24, wherein the doorstop is mounted on a wall of the frame which is directed toward the door panel. 26. The door unit according to any one of the foregoing clauses, wherein the door panel comprises a door panel frame which is formed from profiles, wherein the profiles bound a space in which a cloth or plate material is attachable. 27. The door unit according to the foregoing clause, wherein the profiles comprise a cloth and / or plate attaching means which is configured to fix the cloth or plate material. 28. The door unit according to the foregoing clause, further comprising a cloth or plate material. 29. The door unit according to any one of the foregoing clauses, further comprising a locking means (160) comprising a rotatable locking plate (161) which is rotatable between a releasing position and a locking position, wherein in the releasing position the door panel is free to rotate in the frame and in the locking position the door panel is locked relative to the frame. 30. The door unit according to the foregoing clause, wherein the locking means is integrated in at least one of the frame and the door panel. 31. The door unit according to the foregoing clause, wherein, when the locking means is integrated in the frame, the door panel comprises a recess in which the locking plate is accommodated in the locking position in order to lock the door panel. 32. The door unit according to clause 30, wherein, when the locking means is integrated in the door panel, the frame comprises a recess in which the locking plate is accommodated in the locking position in order to lock the door panel. 33. The door unit according to any one of the foregoing clauses, wherein the recess is an elongate recess, wherein the outer ends of the recess are wider than a middle segment of the recess. 34. A modular construction comprising a modular door unit according to any one of the foregoing clauses, and an exhibition stand frame. Brief description of the figures

[0040] The above stated and other advantageous features and objects of the invention will become more apparent, and the invention better understood, on the basis of the following detailed description when read in combination with the accompanying drawings, in which: Figure 1 shows a perspective view of a door unit according to an exemplary embodiment; Figure 2 shows a front view of a door unit with closed door panel according to an exemplary embodiment; Figures 3A, 3B and 3C show a perspective view of a handle in different positions; Figures 4A and 4B show a perspective view of a closed door panel with a handle in the first and second positions shown in figures 3A and 3C; Figure 5 shows a perspective view of a handle according to an exemplary embodiment; Figure 6 shows a perspective view of a frame according to an exemplary embodiment, wherein a fastening means is enlarged; Figures 7A and 7B show the fastening means enlarged in figure 6 in an extended and retracted position; Figures 8A, 8B and 8C show a perspective view of a doorstop in different positions; and Figures 9A and 9B show a perspective view of a locking means according to an exemplary embodiment. Detailed embodiments

[0041] The following detailed description relates to determined specific embodiments. The teaching hereof can however be applied in different ways. The same or similar elements are designated in the drawings with the same reference numerals.

[0042] The present invention will be described with reference to specific embodiments. The invention is however not limited thereto, but solely by the claims.

[0043] As used here, the singular forms "a" and "the" comprise both the singular and plural references, unless clearly indicated otherwise by the context.

[0044] The terms "comprising", "comprises" and "composed of" as used here are synonymous with "including". The terms "comprising", "comprises" and "composed of" when referring to stated components, elements or method steps also comprise embodiments which "consist of" the components, elements or method steps.

[0045] The terms first, second, third and so on are further used in the description and in the claims to distinguish between similar elements and not necessarily to describe a sequential or chronological order, unless this is specified. It will be apparent that the thus used terms are mutually interchangeable under appropriate circumstances and that the embodiments of the invention described here can operate in an order other than described or illustrated here.

[0046] Reference in this specification to "one embodiment", "an embodiment", "some aspects", "an aspect" or "one aspect" means that a determined feature, structure or characteristic described with reference to the embodiment or aspect is included in at least one embodiment of the present invention. The manifestations of the sentences "in one embodiment", "in an embodiment", "some aspects", "an aspect" or "one aspect" in different places in this specification thus do not necessarily all refer to the same embodiment or aspects. As will be apparent to a skilled person in this field, the specific features, structures or characteristics can further be combined in any suitable manner in one or more embodiments or aspects. Although some embodiments or aspects described here comprise some but no other features which are included in other embodiments or aspects, combinations of features of different embodiments or aspects are further intended to fall within the context of the invention and to form different embodiments or aspects, as would be apparent to the skilled person. In the appended claims all features of the claimed embodiments or aspects can for instance be used in any combination.

[0047] The same or similar elements are designated in the drawing with the same reference numerals.

[0048] Fig. 1 and Fig. 2 show a modular door unit 100 configured to connect to a modular construction such as an exhibition stand. Modular constructions such as exhibition stands comprise a wide range of uses which are flexible and efficient for presenting products and services during events, exhibitions and trade fairs. A very common example is the exhibition booth, a small, stand-alone unit designed specifically to display products or provide information to visitors.

[0049] A door unit 100 comprises a door panel 110 and a frame 120, wherein the door panel 110 is connected rotatably to the frame 120. This rotation enables the door panel 110 to move between an open and closed position. Fig. 1 shows the door panel in the open position. Fig. 2 shows the door panel shown in figure 1 in closed position. A door panel is the displaceable part of the door unit which is designed to open or close a passage through a wall. In modular constructions, such as exhibition stands, the door panel is designed for light-weight and simple operation, this increasing the flexibility and the convenience of use of the construction.

[0050] In the open position the door panel 110 provides access through the door unit 100, while in the closed position access is impeded.

[0051] The door unit 100 further comprises one or more fastening means 130 which connect the frame to the modular construction, whereby the door unit is mountable and demountable in simple manner. This provides flexibility and efficiency in setting up of such temporary structures, such as exhibition stands, and enables the door unit to be adapted rapidly to different configurations.

[0052] The door unit 100 is provided with a handle 140 for operating the door panel. The handle has at least one engaging element which enables the user to rotate the door panel effectively between an open and a closed position. The handle 140 of the door unit has at least one engaging element 141 and is displaceable between a first and second position. In the first position the handle 140 is in a position which enables a user to displace the door panel, so that access is allowed or impeded depending on which position the door is in. This contributes to the convenience of use and the functionality of the door unit, whereby it can be utilized efficiently in modular constructions.

[0053] The handle 140 is furthermore displaceable to a second position. In this second position the handle is positioned such that the door unit 100 is stackable on or against at least one other door unit 100, which other door unit is not shown. This stackability is an important feature for efficient storage and transport of the door units, especially in environments where space must be utilized optimally, such as in fitting exhibition stands. Bringing the handle 140 into this second position makes the door unit compact, this contributing to simplified logistics and space saving. This stackability contributes to efficient storage and transport of a plurality of door units, which is important for companies that construct and dismantle modular constructions on a regular basis.

[0054] Figures 3A, 3B and 3C show a perspective view of a handle 140 in different positions. Figure 3A and figure 4A show the handle 140 in the first position, the handle 140 being, in the first position, in a position which enables a user to displace the door panel, so that access is allowed or impeded depending on which position the door is in, as described above. In the first position the engaging element 141 extends away from the door panel, which means that the engaging element 141 is in a position such that it is easily accessible for a user to operate. This configuration makes it possible for the user to obtain a firm grip on the handle and to rotate the door panel smoothly between the open and closed position. Placing the engaging element in this position improves the operating ergonomics, this resulting in an efficient and nearly effortless interaction with the door unit. The position of the engaging element 141 further ensures that the user has the necessary leverage to safely and effectively lock or unlock the door, depending on the desired position. In the first position engaging element 141 preferably extends substantially perpendicularly relative to the door panel, which means that it lies at an angle of about 90 degrees relative to the surface of the door panel. Placing the engaging element in this position optimizes the lever action, this facilitating the rotation of the door panel between the open and closed position. The perpendicular position of engaging element 141 contributes to an ergonomic interaction with door unit 100, whereby the physical exertion needed to open or close the door is reduced.

[0055] It is noted that engaging element 141 need not necessarily extend perpendicularly relative to the door panel, but that in an exemplary embodiment engaging element 141 can also extend at a non-zero angle relative to the door panel, for instance an acute angle. In this case a perpendicular angle is a non-zero angle. This is because a user can also engage the engaging element if engaging element 141 also extends at an acute angle relative to the door panel. An acute angle can be an angle lying in the range of 0° to 90°, for instance 25°, 45°, 60°, and so on. The angle is measured between an engaging plane formed by the engaging element and a plane formed by the door panel. It is further also noted that an adjacent angle of the acute angle can be an obtuse angle, or that the engaging element extends at an obtuse angle relative to the door panel. In this situation the angle adjacent relative to the obtuse angle forms an acute angle.

[0056] Figure 3C and figure 4B show the handle 140 in the second position. In the second position the handle 140 is positioned such that the engaging element 141 does not protrude, or hardly so, relative to the door panel, giving the door unit a compact form. This configuration is designed to facilitate stackability, so that a plurality of door units can be stored or transported on each other or against each other in efficient manner. Collapsing or otherwise folding in the handle reduces the risk of damage to the handle itself or to adjacent door units during stacking. This position contributes to space-saving, which is particularly advantageous in the logistics of setting up and dismantling modular construction such as exhibition stands. This enables companies to optimally utilize the available storage space and to reduce transport costs, while preserving the integrity and utility of the door units. This configuration considerably limits the chances of damage to the door panel because there are no protruding parts which can strike against or scrape along other surfaces during storage or transport. Protruding handles may after all be vulnerable to impact and mechanical pressure, whereby the chances of breakage or deformation increase. Folding in or collapsing the handle reduces the risk of such damage, this improving the durability and lifespan of the door unit. This design choice is particularly valuable in situations where the door units are frequently stacked and transported, such as when setting up and dismantling exhibition stands. It ensures that the door units remain an optimal condition and that maintenance costs are minimized, while preserving the aesthetic and functional integrity of the door unit.

[0057] Yet another advantage is that handles known from the prior art which are not integrated in the design of the door unit must often be removed before storage or transport in order to prevent them from protruding and possibly becoming damaged. This removal process can require considerable labour and time, because it must often be performed manually and may require tools. Correct storage of the removed parts must furthermore be ensured in order to prevent loss or damage. This additional labour may reduce the efficiency of the process of setting up and dismantling modular constructions. This additional effort is avoided in the door unit 100 where the handle can be positioned in a second position, also referred to as compact position, without being removed. This enables the door units 100 to be stacked and transported faster and with less preparation, which improves the overall productivity and cost-effectiveness of managing the constructions.

[0058] In the second position the engaging element 141 lies substantially parallel to the door panel, which means that it lies flush against the surface of the door panel. This configuration ensures that the handle does not protrude, giving the door unit a more streamlined and compact form. Positioning the engaging element 141 parallel to the door panel considerably reduces the risk of damage to both the handle and the door panel during storage or transport. When engaging element 141 is in the second position, the maximum distance between the engaging element and the door panel is limited, preferably to less than 1 cm. This minimum distance ensures that the handle is effectively embedded in the profile of the door panel, which further reduces the risk of damage due to external influences during storage or transport. By positioning engaging element 141 as close to the door panel as possible a streamlined and compact configuration is achieved which optimizes the stackability of the door unit. When engaging element 141 is in the second position, the maximum distance is measured between the wall surface of the engaging element lying furthest away from the door panel and the wall surface of the door panel lying directly adjacent to the engaging element. This distance is limited, preferably to less than 1 cm, which means that the engaging element lies almost flush against the door panel.

[0059] Figure 3B shows the handle in a position lying between the first position, shown in figure 3A, and the second position, shown in figure 3B. In order to move from the first to the second position the handle 140 can be rotated about a shaft 143 as shown in figure 5.

[0060] Figure 5 shows a perspective view of the handle. The handle 140 of the door unit 100 shown in figure 5 is provided with a displacing means 143 which is configured to displace the handle 140 between the first and second position. This displacing means 143 enables simple operation of the handle, whereby the user can adjust the engaging element depending on the operational needs. In the first position the engaging element extends substantially perpendicularly relative to the door panel, which provides for a firm grip and easy operation. Making use of the displacing means enables the handle to be moved to the second position, wherein the engaging element lies substantially parallel to the door panel, as described above. Displacing means 143 is connected rotatably to the door panel, whereby the handle can rotate between the first and second position. This rotation provides an efficient manner of positioning the handle, depending on the operational requirements.

[0061] The handle 140 is mounted on a distal outer end of the displacing means 143, which means that it is situated at the outer end of the mechanism which moves the handle. The displacing means 143 is configured to position the handle at two different distances relative to an end edge of the door panel. At the first distance the handle strikes substantially against the end edge of the door panel. This situation is shown in figures 3A, 3B, 3C, 4A and 4B.

[0062] At the second distance the displacing means provides the option of moving the handle between the first position and the second position. The handle 140 in the second position is shown in figure 5. At the second distance the handle can be rotated. The handle can then be displaced back to the first distance, wherein the handle lies against the end edge of the door panel. The handle can be displaced from the first to the second distance by pulling the handle. The handle can conversely be displaced from the second distance to the first distance by pushing the handle.

[0063] Figure 5 further shows that the handle 140 comprises a base 142 which is connected to the at least one engaging element, which base 142 is oriented at a non-zero angle relative to the at least one engaging element and is configured to strike against an end edge of the door panel. This means that the base does not run parallel to the engaging element, but lies at an angle differing from zero degrees. The base is configured such that it can strike against an end edge of the door panel. This striking serves multiple purposes: it stabilizes the handle when handle 140 lies against the end edge of the door panel in the first distance position, and it provides a fixed contact point which supports the rotation and displacement of the handle during use. Positioning and designing the handle 140 in this way makes the door unit streamlined and efficient for storage, while the functionality and the convenience of use of the handle are simultaneously preserved. Striking of the base against the end edge also aids in limiting the movement of the handle, this contributing to the structural integrity of the door unit and reducing the risk of damage due to unintended movements.

[0064] Figure 5 shows that the base 142 of the handle extends in both a longitudinal and a lateral direction. This means that the base has a certain length and width which define the surface area thereof. The third distance 146 between two opposite longitudinal peripheral edges 145a, 145b of the base is designed such that it corresponds at most with the depth dimension of the door panel, as measured along the end edge thereof. This ensures that the base 142 lies exactly within the boundaries of the door panel, which enhances a streamlined integration of the handle and the door panel.

[0065] Making the third distance 146 smaller than the depth dimension of the door panel embeds the base 142 effectively inside the profile of the door panel 120. This prevents the base from protruding, which reduces the chances of damage during storage or transport. This also contributes to a compact and efficient stacking of the door units, since there are no protruding parts that can get in the way. These features improve the practical application of the door unit by enabling space saving and protection against mechanical pressure or impact.

[0066] In addition, the positioning of the base 142 within the depth dimension of the door panel provides an aesthetic and functional integration which enhances the overall durability of the door unit. The design ensures that the handle and the door panel co-act seamlessly, this increasing the convenience of use and the operational efficiency, especially in modular constructions such as exhibition stands where flexibility and reusability are of great importance.

[0067] Figure 5 shows that the at least one engaging element is situated at the position of a peripheral edge of the base 142 and is connected thereto. This positioning means that the engaging element is placed along the outer edge of the base. Placing the engaging element on the peripheral edge maximizes the lever action, whereby the user can operate the door panel with minimum effort. The connection between the engaging element and the base is designed such that it provides a strong and stable interaction, this increasing the durability and reliability of the handle.

[0068] The positioning of the engaging element at the edge of the base moreover contribute to an efficient use of space in the door unit. It minimizes protruding parts and makes the handle compact and streamlined, this enhancing the stackability and protection against damage during storage and transport.

[0069] Figure 5 illustrates that the at least one engaging element 141 is formed integrally with the base. This means that the engaging element and the base are manufactured from one piece of material, without there being any separate parts that have to be connected to each other. This integral form provides several advantages in terms of durability and structural integrity. Forming the engaging element 141 and the base 142 as one whole considerably reduces the chances of weak spots which may result due to connections or seams.

[0070] Figure 5 shows that the at least one engaging element 141 is connected to the base at a location where two peripheral edges cross each other. This configuration means that the engaging element is situated at a strategic point along the base, which affects the structural integrity and function of the handle. A connection is preferred wherein the engaging element extends only partially along one of the two intersecting peripheral edges. This partial connection along one edge, for instance along edge 145a, provides a number of advantages.

[0071] The positioning of the engaging element at the position of intersecting edges and the partial connection along one edge provide for an efficient operation and grip. This ensures particularly that the engaging element protrudes relative to the door panel in the first position or comes to lie flush or almost flush with the door panel in the second position. In such an exemplary embodiment a fourth distance 148 between a lateral edge 144a of the base and a directly adjacent edge 148 of the at least one engaging element 141a is at least as great as, and preferably greater than, a depth dimension of the door panel measured along the end edge thereof.

[0072] Figure 5 shows two engaging elements 141a, 141b, wherein the description above can apply to both.

[0073] Figure 6 shows a perspective view of a frame 120 according to an exemplary embodiment, wherein a fastening means 130 is enlarged. The frame 120 is also shown partially in section in order to be able to show the fastening means 130 as well. Figures 7A and 7B show the fastening means 130 enlarged in figure 6 in an extended and retracted position. Figure 7A shows the fastening means in retracted position, figure 7B in extended position.

[0074] The fastening means 130 is designed such that it is mounted moveably inside the frame 120, whereby it can move between a retracted position and an extended position. In the retracted position the fastening means is retracted substantially wholly, and preferably wholly, into the frame 120. This configuration ensures that the fastening means does not protrude, giving the door unit a streamlined and compact form which enhances stackability and protection against damage during storage and transport. This also simplifies mounting and placing.

[0075] When the fastening means 130 is brought into the extended position, it extends through the frame 120 so that the frame can be fastened to an adjacent modular construction. It provides a mechanism whereby the door unit can be fastened firmly and safely to other modular elements, resulting in a stable and interconnected construction.

[0076] The option of moving the fastening means between these positions provides flexibility and convenience of use, whereby the door unit can be adapted rapidly to different configurations and requirements of modular constructions. This design feature increases the operational efficiency and the practical application of the door unit by simplifying both the mounting and the demounting of the construction, which is particularly valuable in dynamic environments such as trade fairs. This preferred embodiment, wherein the fastening means is mounted movably inside the frame, additionally ensures that the fastening means are always present and always remain integrated in the door unit. This prevents the risk of loss of separate parts, a common problem in traditional fastening systems which have to be removed for storage or transport. Keeping the fastening means within the frame, even in the retracted position, guarantees the integrity and the completeness of the door unit.

[0077] In order to further support the functionality of the movable fastening means 130 a sleeve 131 can be provided. This sleeve 131 is mounted on a first peripheral wall of the frame 120 and provides a protective and guiding structure in which the fastening means is mounted movably.

[0078] The sleeve 131 ensures that the fastening means can move smoothly between the retracted and extended position, without it running the risk of jamming or becoming damaged due to contact with other parts of the door unit or the modular construction. This protection contributes to the durability and reliability of the fastening means, which increases the operational efficiency of the door unit.

[0079] A springy element 132 can be provided to push the movable fastening means to the retracted position. This springy element is designed such that it exerts a constant force on the fastening means, whereby it is pulled inward automatically when it is not actively in use. Owing to this mechanical support, the fastening means remains neatly inside the frame, this enhancing the streamlined form of the door unit, see figure 7A. The springy element contributes to the efficiency and the convenience of use of the door unit by providing for an automatic return to the retracted position, which reduces the risk of protruding parts which can become damaged during transport or storage. This mechanism eliminates the need for manual adjustment of the fastening means, which saves time and simplifies the operational processes.

[0080] The at least one fastening means 130 is integrated in the frame 120 of the door unit 100, which means that it forms a fixed part of the structure of the frame. This integration ensures that the fastening means is always present and functional, without the risk of it being lost or being placed incorrectly. Designing the fastening means as an integrated part of the frame increases the durability and structural integrity of the door unit.

[0081] The integrated position of the fastening means inside the frame provides several advantages. Firstly, it provides for a streamlined and compact construction, whereby the fastening means does not protrude and the door unit can be stacked and stored in simple manner. This reduces the chances of damage during transport and storage. Secondly, the integration simplifies mounting and demounting of the door unit in modular constructions, since there are no separate components that have to be fastened or removed.

[0082] Figures 8A, 8B and 8C show a door unit with a doorstop 150. The doorstop 150 has a stop 151 and is connected rotatably to the frame or the door panel. This doorstop is designed such that the stop can be positioned in at least one first stop position and a passage position. In the first stop position the stop prevents the door panel from rotating beyond the frame 120, whereby the rotation of the door panel is bounded and controlled in effective manner. In the passage position the stop allows the door panel 120 to rotate freely along the frame, making it possible to completely open or close the door without impediment. The first stop position is for instance shown in figures 8A and 8B. The passage position is shown in figure 8C.

[0083] Additionally, the doorstop 150 can further be positioned in at least one second stop position. In the first stop position the stop lies adjacently of a first peripheral wall of the frame, see for instance figure 8A, while in the second stop position the stop lies adjacently of a second peripheral wall of the frame lying opposite the first peripheral wall, see figure 8B. This provides flexibility in the rotation movements of the door panel and makes it possible to adjust the rotation angle and the position of the door to specific operational requirements.

[0084] In the passage position the stop is positioned such that the door panel can rotate above or below the stop, figure 8C shows a situation where the door panel will rotate above the stop. This design provides for an unimpeded movement of the door panel, for instance in a so-called swing door. The doorstop can further be mounted in an upper or a lower segment of the frame, depending on the requirements of the construction and the use. Figures 8A, 8B and 8C show a situation wherein the doorstop is positioned in a lower segment.

[0085] Finally, the doorstop 150 is mounted on a wall of the frame 120 which is directed toward the door panel, whereby the interaction between the door panel and the doorstop is direct and effective. This mounting position ensures that the doorstop can be easily accessed and operated, which contributes to the convenience of use and the operational efficiency of the door unit. The design of the doorstop provides both structural support and functional flexibility, whereby the door unit can be used optimally in modular constructions such as exhibition stands.

[0086] Finally, figures 9A and 9B show that the door unit 100 can comprise a locking means 160, optionally with a password number lock as shown in the figures.

[0087] Figures 9A and 9B show a door unit 100 comprising a locking means with a rotatable locking plate 161. The locking plate 161 can rotate between a releasing position and a locking position. In the releasing position the door panel 120 is free to rotate inside the frame, while in the locking position the door panel is locked relative to the frame. When the locking means 160 is integrated in the frame, the door panel 120 comprises a recess in which the locking plate is accommodated in the locking position, whereby the door panel is locked in effective manner. Conversely, when the locking means is integrated in the door panel, the frame has a recess in which the locking plate is accommodated in the locking position, which likewise contributes to locking of the door panel. In both situations there is of course also a slot in the frame or the panel for turning the locking plate 161 therethrough. The recess is elongate, wherein the outer ends 162 are wider than the middle segment 131, this enabling an efficient locking and release of the door panel. This mechanism provides a technical advantage in that it guarantees a robust locking of the door panel in the frame, which increases the safety and stability of the door unit.

[0088] The interaction between the recess and the locking plate provides for an effective locking, wherein the geometry of the recess contributes to an improved operation of the locking means. This configuration makes optimal use of the available space and the strength of the locking, which results in improved performance without requiring additional operational effort, storage capacity or bandwidth. The wider outer ends also ensure that an incorrect alignment when the locking plate 161 enters or exits is accommodated by the wider slot at the position of the outer ends.

[0089] The skilled person will appreciate on the basis of the above description that the invention can be embodied in different ways and on the basis of different principles. The invention is not limited here to the above described embodiments. The above described embodiments and the figures are purely illustrative and serve only to increase understanding of the invention. The invention will not therefore be limited to the embodiments described herein, but is defined in the claims.

Claims

1. A modular door unit (100) which is configured to be connectable to a modular construction, such as a stand at a trade fair, wherein the door unit comprises a door panel (110) and a frame (120), wherein the door panel is connected rotatably to the frame so that the door panel is rotatable between at least one open position and a closed position, wherein access through the door unit is allowed in the at least one open position and access through the door unit is impeded in the closed position, wherein the door unit further comprises at least one fastening means (130) which is connected to the frame and is configured to connect the frame releasably to the modular construction so that the door unit is mountable and demountable in the modular construction, wherein the door unit further comprises a handle (140) with at least one engaging element (141), wherein the handle (140) is displaceable between a first position and a second position, wherein a user can rotate the door panel between the at least one open and closed position, and in the second position the handle is positioned such that the door unit is stackable on or against at least one further door unit, wherein in the first position the at least one engaging element (141) extends substantially perpendicularly relative to the door panel; and wherein in the second position the at least one engaging element (141) lies substantially parallel to the door panel.

2. The door unit according to the foregoing claim, wherein in the first position the at least one engaging element (141) extends away from the door panel.

3. The door unit according to claim 1, wherein in the second position a maximum distance measured between the at least one engaging element (141) and the door panel is limited, the distance preferably being smaller than 1 cm.

4. The door unit according to any one of the foregoing claims, wherein the maximum distance is measured between a wall surface of the at least one engaging element lying furthest away from the door panel and a wall surface of the door panel lying adjacently of the at least one engaging element.

5. The door unit according to any one of the foregoing claims, wherein the handle (140) further comprises a base (142) which is connected to the at least one engaging element, which base (142) is oriented at a non-zero angle relative to the at least one engaging element and is configured to strike against an end edge of the door panel.

6. The door unit according to any one of the foregoing claims, wherein the handle (140) comprises a displacing means (143) which is configured to displace the handle between the first position and the second position.

7. The door unit according to the foregoing claim, wherein the displacing means (143) is connected rotatably to the door panel so that it is rotatable between the first position and the second position.

8. The door unit according to any one of the foregoing claims 6-7, wherein the handle is mounted on a distal outer end of the displacing means (143) and wherein the displacing means is configured to position the handle at a first distance and a second distance relative to an end edge of the door panel so that, at the first distance, the handle strikes substantially against the end edge of the door panel and, at the second distance, the handle is displaceable between the first position and the second position.

9. The door unit according to claim 5 and any one of the claims 6-8, wherein the base (142) of the handle is connected to the displacing means.

10. The door unit according to claim 5, wherein the base extends in a longitudinal and a lateral direction, wherein a third distance (146) between two opposite longitudinal peripheral edges (145a, 145b) of the base corresponds at most with a depth dimension of the door panel measured along the end edge thereof, wherein the second distance is preferably smaller than the depth dimension of the door panel.

11. The door unit according to claim 5 and any one of the claims 6-10, wherein the at least one engaging element (141, 141a, 141b) is connected to the base at the position of a peripheral edge (145a, 145b) of the base.

12. The door unit according to the foregoing claim, wherein the at least one engaging element is formed integrally with the base.

13. The door unit according to any one of the foregoing claims 9-12, wherein the at least one engaging element is connected to the base at the position of two intersecting peripheral edges (144b, 145a; 145b, 144a), wherein the at least one engaging element preferably comprises a connection to the base which extends only partially along one (145a) peripheral edge of the two intersecting peripheral edges (144b, 145a; 145b, 144a).

14. The door unit according to any one of the foregoing claims and claim 5, wherein a fourth distance (148) between a lateral edge (144a) of the base and an edge (148) of the at least one engaging element (141a) is at least as great as, and preferably greater than, a depth dimension of the door panel measured along the end edge thereof.

15. A modular construction comprising a modular door unit according to any one of the foregoing claims, and an exhibition stand frame.

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