Connector for connecting modules in temporary building

Abstract

A connector (100) for releasably connecting frame modules (1201, 1202), comprising: a sleeve (108) comprising one or more circumferential slits (105, 112); comprising a flat surface (110) defining a front gripping surface; a first set of locking elements (101) wherein each locking element (301, 305) comprises a flat surface (310) wherein the first set of locking elements (101) is disposed in the one or more circumferential slits (105, 112) and is movable between a retracted state and an extended state such that the associated protruding flat surfaces collectively define a rear clamping surface, the connector (100) is adapted to clamp the two module parts (1203, 1204) with the locking elements of the first group (101) in the extended state after the locking elements of the first group (101) are inserted through corresponding holes (1300) in the module parts (1203, 1204) in the retracted state.

Description

Technical Field

[0001] The present invention generally relates to connectors suitable for releasably connecting modules in temporary buildings, such as temporary exhibition stands. In particular, a connector is proposed that allows frame modules to be connected in a convenient and time-saving manner while ensuring a high degree of reliability and firmness of the connection. Background Art

[0002] During trade fairs and exhibitions, temporary exhibition stands are used during the event and then removed after the event. In a modular solution for exhibition stand construction, such as described in BE1020560A3, a set of standard frame modules are provided, which are used as universal building blocks. By connecting multiple frame modules together, a temporary exhibition stand designed according to the desired design can be built. The frame module usually includes a rectangular frame, and a series of holes are provided on each side of the frame. These holes allow the frame module to be connected to the adjacent frame module by inserting a fastener into the corresponding hole (thereby allowing the releasable connection of the fastener). Usually, the hole is relatively large, thereby avoiding the need to position the frame module very accurately before connection. After the skeleton is built by a plurality of connected frame modules, the walls can be covered with panels or canvas to obtain the appearance of the desired temporary exhibition stand. Very large exhibition stands can be built with this modular solution, which usually include multiple floors and use tens to hundreds of frame modules.

[0003] Typically, in order to releasably connect the frame modules, standard fasteners are not used, but connectors specially designed for use in modular systems, which often allow tool-free application. In addition to adapting to the layout of the frame and holes, the connectors need to provide a high degree of reliability and robustness for the connection of the frame modules. In fact, in the event of an impact on the structure, such as someone falling on the stand, the connectors need to withstand the tensile and bending loads that occur, thus preventing the entire structure from collapsing.

[0004] In current modular solutions for exhibition stand construction, the threaded engagement principle is usually used in connectors: the connector comprises a cylindrical body, a thread is provided at one outer end of the cylindrical body, a head component is provided at the opposite outer end, and the connector comprises a separate second component similar to a nut. After the cylindrical body is inserted through the corresponding hole, the nut component is screwed to the body, thereby clamping the frame surface between the nut and the head component of the body. Examples of such connectors can be found in BE1020560A3 or http: / / www.bematrix.com / en / products / parts / d30-connectors / toolless-connector-d30 / .

[0005] One disadvantage of the connectors currently used is that the two individual connector parts can become separated and lost after disassembly. Furthermore, in order to make the connection, the two parts must be brought together, which requires the use of both hands to install the connector. This makes the application of the connector cumbersome and therefore time inefficient. Furthermore, for each connector to be set, the nut part needs to be screwed onto the body, which requires additional time. Due to the considerable time required to apply each individual connector, the assembly and disassembly of the structure can take a long time, especially for exhibition stands with a large number of frame modules.

[0006] Therefore, there is a need for a connector that allows frame modules to be connected in a more convenient and time-saving manner.

[0007] In the prior art, solutions are proposed to improve assembly efficiency. For example, CN201780736U discloses a quick connection lock for connecting adjacent display modules in an LED display. The connector consists of a lock body and a lock slot pad. The lock body includes a fixed pad and a rod provided with a transverse pin. The lock slot pad includes a groove adapted to receive the transverse pin. In the connected state, the two module faces are sandwiched between the lock slot pad and the fixed pad of the lock body. The connector is put into a locked state by rotating the lock slot pad more than 90 degrees so that the transverse pin of the lock body engages with the groove of the lock slot pad. Therefore, locking is achieved by locking pins, which takes less time than using the threaded engagement principle. However, two separate components are still used in the connector, which adversely affects the ease of implementation and application efficiency. Finally, the disclosed connector is used in combination with an LED frame having a specific hole of an elongated shape. Therefore, it cannot be used to connect any type of frame module, such as a frame module with a large round hole.

[0008] On the other hand, it is well known that connectors are particularly focused on providing simple and quick fastening and release, but are not suitable for applications that require a secure connection under load and impact conditions. For example, conventional ball lock pins, such as those described in EP0838600B1 or https: / / uk.misumi-ec.com / vona2 / detail / 221006462889 / #, are used to temporarily hold two parts together, for example for releasably fixing workpieces, or for aligning metal sheets during welding. This one-piece connector that relies on a small ball for locking allows for effective and quick application, but under impact or load conditions, this one-piece connector can easily come loose accidentally. Therefore, this type of connector is not suitable for connecting frame modules in temporary exhibition stands, where a high degree of reliability and robustness of the connection is required under all circumstances to prevent the collapse of the huge structure.

[0009] The object of the present invention is to disclose a connector that solves one or more of the above-mentioned disadvantages of prior art solutions. More specifically, the object of the present invention is to provide a connector suitable for temporary exhibition stands that allows connecting frame modules in a convenient and time-saving manner while ensuring a high degree of reliability and firmness of the connection. Summary of the invention

[0010] According to a first aspect of the present invention, the above object is achieved by a connector as defined in claim 1 for releasably connecting two modules in a modular system for temporary construction, the connector comprising:

[0011] - a sleeve extending in a longitudinal direction between a front outer end and a rear outer end, the sleeve comprising one or more circumferential slits at a first longitudinal position;

[0012] a head part adapted to be attached to the front outer end of the sleeve, the head part comprising a flat surface which, in the attached state, defines a front clamping surface lying in a transverse plane and facing the sleeve;

[0013] - a first set of one or more locking elements, wherein each locking element comprises a flat surface, wherein the one or more locking elements of the first set are arranged in the one or more circumferential slots at the first longitudinal position and are movable between

[0014] o a retracted state in which the locking element is at least partially recessed into the sleeve, and

[0015] o an extended state in which the locking element protrudes from the sleeve such that associated protruding flat surfaces together define a rear clamping surface lying in a transverse plane and facing the front clamping surface,

[0016] The connector is adapted to clamp the two module parts between the front clamping surface and the rear clamping surface in an extended state after the locking elements of the first set are inserted through corresponding holes in the module parts in a retracted state.

[0017] Therefore, the present invention relates to a connector. The connector is suitable for releasably connecting two modules in a modular system for temporary buildings. The temporary building may be a temporary exhibition stand, or other types of buildings that are removable after temporary use, such as a podium or a decorative element. A modular system refers to a solution that utilizes a set of common elements or modules as building modules. A module is, for example, a frame module, which comprises a rectangular frame consisting of four hollow columns. Other examples of modules are display modules, which have an LED display mounted on the frame, or a truss module, which has an elongated rectangular frame provided with internal brackets. The module comprises holes that allow the module to be connected to another module by a connector inserted into the corresponding holes of the two modules. Typically, each side of the frame is provided with a series of holes positioned according to a spatial grid. Usually, the holes are relatively large, thereby avoiding the need to position the frame modules very accurately before connection. In the connected state, two module components contained in two corresponding modules are clamped together. For example, the module component is one of the columns of the frame module, and in the connected state, the sides of the corresponding columns are clamped to each other. The module components may have other shapes as long as the holes provided enable the connection of adjacent modules by connectors inserted into the corresponding holes.

[0018] The connector comprises a sleeve extending in the longitudinal direction between the front outer end and the rear outer end. The sleeve refers to a hollow elongated body. In one embodiment, the sleeve comprises a central part, any cross section of which is circular or has a circular envelope. For example, the sleeve has a cylindrical central part in which grooves and / or slits can be provided. In one embodiment, the sleeve comprises a conical end connected to the central part and located at the rear outer end of the sleeve. Such a conical end allows the connector to be easily inserted into the hole of the module component.

[0019] The connector further comprises a head component. The head component is attached to the front outer end of the sleeve. In one embodiment, the head component can be removed from the sleeve, but during use of the connector, the head component is in a connected state. The head component includes a flat surface. When the head component is connected to the sleeve, the flat surface defines a front clamping surface located in a transverse plane and facing the sleeve. The front clamping surface is a first surface that helps to clamp the module component.

[0020] The sleeve comprises one or more circumferential slits at a first longitudinal position, and a first group of one or more locking elements are arranged in the slits. A slit refers to an opening that generally has an elongated shape. The slit is circumferential, which means that it extends through the entire circumference of the sleeve or a part of the circumference. The sleeve may include one slit, in which a plurality of locking elements are arranged, the sleeve may include a plurality of slits, each slit having a locking element, the sleeve may include a plurality of slits, in which a plurality of locking elements are arranged, and so on. In one embodiment, the first group of locking elements comprises two individual locking elements, which are opposite to each other in cross section.

[0021] Each locking element included in the first group is capable of moving between a retracted state and an extended state. In the retracted state, the locking element is completely or partially recessed in the sleeve. This can also be referred to as the retracted position of the locking element. In the extended state, the locking element protrudes from the sleeve, which means that a larger part of the locking element is located outside the outer surface of the sleeve than in the retracted state. For example, the connector may include an internal body that can be moved within the sleeve by pressing a button. By moving the internal body in the longitudinal direction, the locking element can be switched from a completely retracted state to a completely extended state.

[0022] Any locking element of the first group includes a flat surface. For example, the locking element has a flat side facing the head component, or has two opposite flat sides. When the locking element is in an extended state, any flat surface protrudes completely or partially from the sleeve. These protruding flat surfaces together define a rear clamping surface that helps to clamp the second surface of the module component. The rear clamping surface is located in a transverse plane and faces the front clamping surface defined by the head component.

[0023] In the retracted state of the locking element, the cross-section of the connector is small enough to be inserted through the holes of the module parts. Therefore, in order to apply the connector, for example by pressing a button, the locking element is first in a retracted state, after which the sleeve is inserted through the aligned holes of two adjacent modules. During insertion, the sleeve passes through the module parts through the holes. After insertion, the locking element can be in an extended state, for example by releasing the button to be in the extended state. In the connected state, the two module parts are clamped between the front clamping surface defined by the head part and the rear clamping surface defined by the extended locking element. Therefore, in the connected state, the two module parts are clamped between two flat surfaces, while the sleeve extends through the holes of the module parts.

[0024] The connector of the invention has several advantages compared to the connectors of the prior art. Firstly, the connector allows the frame modules to be connected in a convenient and time-saving manner. In fact, the connector is provided as a whole, thereby eliminating the risk that several connector parts may become separated and allowing a convenient application. Furthermore, due to the locking principle, the application of the connector can be done with one hand, thus saving time. Finally, locking the connector requires only a change of the position of the locking element, for example by pressing or releasing a button. This saves a considerable amount of time compared to the existing connectors, in which a nut part needs to be screwed onto the sleeve for each connector to be set.

[0025] Secondly, while allowing easy and quick fastening and release, the connector of the invention still provides the required strength and robustness. In particular, the connector allows the module to be clamped with a high clamping force, thereby achieving a connection that provides sufficient resistance to high tensile loads. In fact, in the connected state, the two module parts are clamped between two flat surfaces of the connector. In particular, even in the position of the locking element, a flat clamping surface is used, which is provided by the flat side of the protruding locking element. The use of such a flat clamping surface ensures that the stress generated is evenly distributed over a relatively large surface, thereby preventing the occurrence of local high stresses under tensile loads. Preventing the occurrence of local high stresses under tensile loads is essential, because the concentrated point loads generated under tension may cause local deformation of the frame (for example made of aluminum), resulting in the connector being pulled through the deformed frame side and loosening the connection.

[0026] In summary, the connector of the invention allows combining an increased connection speed with a considerable clamping strength. Providing this combination is not obvious, since on the one hand a flat clamping surface is important for the clamping strength, but on the other hand a flat surface does not easily allow for a surface decrease to be adjusted to the size of the connection hole. Furthermore, even when a surface decrease by means of a telescopic element has been considered, it is not obvious to obtain a flat telescopic element, since the rolling properties of a conventional locking ball cannot be utilized, which allows for a simple retraction mechanism.

[0027] Finally, the connector also allows to provide a connection that is sufficiently resistant to bending loads and to torsion. In fact, frame modules usually have hollow columns. When the modules are in the connected state, the front plates of these columns push against each other. However, by making the sleeve of the connector long enough, the clamping of the connector surface can be done on the rear plate of the respective column instead of clamping the front plate. In this way, the long sleeve body spans the entire column of the two modules, thus preventing the modules from twisting under torsion loads.

[0028] Optionally, any locking element of the first group includes a curved edge facing away from the sleeve. In one embodiment, the curved edge of the locking element has a cross-section corresponding to a circular arc. For example, when the locking element is in a retracted state, the curved edge is on a circle whose center corresponds to the center point of the sleeve. In other words, in the retracted state, the curved edges together define a circle concentric with the cross-section of the sleeve. In another embodiment, when in an extended state, the curved edge is located on a circle concentric with the sleeve. The advantage of providing a locking element with a curved edge is that in an extended state, any locking element protrudes from a cylindrical sleeve at a similar height. Therefore, on the circumference of the connector, a clamping surface that evenly distributes the generated stress is obtained in a transverse plane. In addition, in the retracted position, the locking element follows the circular shape of the sleeve, thereby allowing easy insertion through a circular hole.

[0029] Optionally, the head component and the front outer end of the sleeve both include threads, so that the head component can be moved in the longitudinal direction by screwing, thereby allowing the distance between the front clamping surface and the rear clamping surface to be adjusted. In this way, the clamping length can be adjusted to compensate for any gap or deviation out of tolerance between two adjacent modules.

[0030] Optionally, the connector further comprises:

[0031] - an inner body which is at least partially arranged inside the sleeve and is movable in the longitudinal direction,

[0032] - a first linear cam assembly, comprising, for each locking element of the first set:

[0033] o a cam element comprising a ramp inclined relative to the longitudinal direction;

[0034] o a follower in contact with the cam element and adapted to slide along the surface of the ramp such that moving the cam element in the longitudinal direction causes a translational movement of the follower according to a direction perpendicular to the longitudinal direction,

[0035] Wherein, any cam element of the first linear cam assembly is contained in the inner body, and any follower of the first linear cam assembly is contained in the locking element of the first group, so that by moving the inner body in the longitudinal direction, any locking element of the first group is allowed to translate according to a direction perpendicular to the longitudinal direction. Therefore, the connector includes one or more linear cams, which are used to move the locking elements of the first group between the retracted state and the extended state. A linear cam is provided for each locking element of the first group. If the first group includes a plurality of locking elements, a plurality of linear cams are provided, and the plurality of linear cams together form a linear cam assembly. Each linear cam allows the locking element to be moved up and down relative to the sleeve by moving the inner body of the sleeve forward and backward. To this end, each locking element includes a follower, and the inner body arranged inside the sleeve includes a cam element. The cam element includes a flat surface inclined relative to the transverse plane and inclined relative to the longitudinal direction. For example, the cam element is arranged as a recess or groove in the inner body, which recess or groove has a ramp. Moving the cam element in the longitudinal direction causes the follower to move according to a translation in the transverse plane, which occurs in a direction perpendicular to the longitudinal direction. The follower and the cam element together form a linear cam. Moving the inner body in the longitudinal direction causes each locking element of the first set to translate in a transverse plane, any of these translations being perpendicular to the longitudinal direction. The advantage of using a linear cam assembly to move the locking elements is that the locking elements can be actively pushed inwards or outwards. Due to the flat shape of the locking elements, the rolling characteristics of conventional locking balls cannot be utilized, and actively pushing the locking elements inwards or outwards is necessary.

[0036] Optionally, the connector comprises a button which, when pressed, is adapted to move the inner body in a longitudinal direction relative to the sleeve so that the inner body moves towards the rear outer end of the sleeve. This means that a portion of the inner body located inside the hollow sleeve moves away from the front outer end of the sleeve and closer to the rear outer end of the sleeve.

[0037] Optionally, the connector comprises a spring adapted to move the inner body relative to the sleeve in a longitudinal direction when the button is released, whereby the inner body is displaced towards the front outer end of the sleeve. This means that a portion of the inner body located inside the hollow sleeve moves away from the rear outer end of the sleeve and closer to the front outer end of the sleeve.

[0038] Optionally, the sleeve comprises one or more openings at a second longitudinal position between the first longitudinal position and the front outer end, and the connector comprises a second group having one or more locking elements, wherein the one or more locking elements of the second group are arranged in one or more openings of the sleeve at the second longitudinal position and are movable between a retracted state and an extended state, in which the locking elements are at least partially recessed in the sleeve, and in which the locking elements protrude from the sleeve. This means that, in addition to the locking elements of the first group, the connector further comprises a locking element of the second group. The locking elements of the second group are arranged at a second longitudinal position between the head component and the locking elements of the first group. To this end, the sleeve comprises one or more openings at the second longitudinal position. The locking elements of the second group can have various shapes. In one embodiment, the shape of the locking elements of the second group is similar to the shape of the locking elements of the first group, and therefore comprises a flat surface on one or both sides. In this case, the opening at the second longitudinal position is arranged as a circumferential slit. In another embodiment, the locking elements of the second group have a circular shape and are therefore provided as a ball. In this case, the opening at the second longitudinal position can be a circular opening.

[0039] The advantage of providing a second group of locking elements is that a rotation of the connector during installation can be avoided. In fact, after the connector is inserted through the connection hole, the locking elements of the second group are in an extended state just like the locking elements of the first group. When the connector is rotated around its axis, the locking elements of the second group can engage with a blocking element arranged inside the frame module, thereby preventing further rotation of the connector. In this way, the clamping length can be adjusted in a convenient way by screwing the head component without being hindered by rotating the connector. In addition, a preferred angular position of the connector can be ensured. For example, the locking elements of the second group can be arranged so that when further rotation is prevented, the locking elements of the first group are clamped on a preferred surface of the frame module, for example on the side of the hole where the frame has the highest strength.

[0040] Optionally, each opening at the second longitudinal position is a circumferential slit, and each locking element of the second group comprises a flat surface, so that in the extended state, the associated protruding flat surfaces together define a central clamping surface located in a transverse plane and facing the front clamping surface. This means that, just like the locking elements of the first group, the locking elements of the second group have a flat surface. For example, the locking elements of the second group have one plane or two opposite planes. The advantage of using flat locking elements in the second group is that these locking elements can contribute to the clamping of the module. In fact, the locking elements of the second group can be positioned so that when the connector is in the installed state, they are in contact with or close to the inner surface of the frame module. During the impact, the clamping will be carried out in two different positions: the position between the head part and the locking elements of the first group, and the position between the head part and the locking elements of the second group. Just like the locking elements of the first group, the flat clamping surface provided by the locking elements of the second group allows a uniform distribution of the stresses that occur during the impact. This further contributes to a high clamping force, thereby achieving a connection that provides sufficient resistance to high tensile loads.

[0041] In one embodiment, any locking element of the second set comprises a curved edge facing away from the sleeve, the curved edge having a cross section corresponding to an arc of a circle.In a further embodiment, the second set of locking elements comprises two individual locking elements, the two individual locking elements being opposite each other in cross section.

[0042] Optionally, any locking element of the second group has an angular position rotated more than 90 degrees relative to one of the locking elements of the first group. This means that in a front view of the extended state of the connector and all the locking elements, the center point or midpoint of the locking element of the second group is rotated 90 degrees relative to the center point or midpoint of the locking element of the first group. In one embodiment, the first group of locking elements and the second group of locking elements contain the same number of locking elements, so that any locking element of the second group corresponds to another locking element of the first group, and the angular position of the former is rotated more than 90 degrees relative to the latter. In one embodiment, any locking element of the second group has the same shape as one of the locking elements of the first group, but any locking element of the second group has an angular position rotated more than 90 degrees. For example, the locking elements of the first group and the locking elements of the second group can be positioned so that in the extended state of the locking elements, the cross section at the first longitudinal position can be obtained by rotating the cross section at the second longitudinal position more than 90 degrees.

[0043] Optionally, the connector further comprises a second linear cam assembly, for each second set of locking elements, the second linear cam assembly comprising:

[0044] - a cam element comprising a ramp inclined relative to the longitudinal direction;

[0045] a follower in contact with the cam element and adapted to slide along the surface of the ramp so that moving the cam element in the longitudinal direction causes a translational movement of the follower according to a direction perpendicular to the longitudinal direction,

[0046] Wherein, any cam element of the second linear cam assembly is contained in the inner body, and any follower of the second linear cam assembly is contained in the locking element of the second group, thereby allowing any locking element of the second group to be translated according to a direction perpendicular to the longitudinal direction by moving the inner body in the longitudinal direction. This means that, similar to the locking elements of the first group, the linear cam mechanism is used to move the locking elements of the second group between a retracted state and an extended state.

[0047] Optionally, the longitudinal position of one or more cam elements of the first linear cam assembly and the longitudinal position of one or more cam elements of the second linear cam assembly are such that moving the inner body in the longitudinal direction causes the locking elements of the first group and the locking elements of the second group to translate sequentially. This means that the two cam assemblies are designed and positioned so that when the inner body is moved forward or backward, the locking elements of the second group and the locking elements of the first group do not move simultaneously, but move in a sequential, asynchronous manner. In other words, when the inner body is moved in the longitudinal direction, the locking elements of the first group and the locking elements of the second group change from a retracted state to an extended state in a sequential, sequential manner. Therefore, there is a delay between the retraction of the elements of the first group and the retraction of the elements of the second group: when the inner body is moved towards the rear outer end of the sleeve, the locking elements of the second group are retracted first, and then the locking elements of the first group are retracted. Similarly, when the inner body is moved towards the front outer end of the sleeve, the locking elements of the first group are extended first, and the locking elements of the second group are extended after some delay. In this way, it can be ensured that the locking elements of the first group will always move to the extended state, thereby ensuring sufficient clamping of the module. In fact, even if the extension of the locking elements of the second group is blocked or hindered for some reason, it will not hinder the extension of the locking elements of the first group.

[0048] Optionally:

[0049] - the sleeve comprises one or more openings at a third longitudinal position and comprises one or more openings at a fourth longitudinal position, the third longitudinal position and the fourth longitudinal position both being located between the first longitudinal position and the front outer end;

[0050] The connector comprises a third group of one or more locking elements and a fourth group of one or more locking elements, wherein the one or more locking elements of the third group and the one or more locking elements of the fourth group are arranged in the one or more openings of the sleeve at a third longitudinal position and a fourth longitudinal position, respectively, and are movable between the following states

[0051] o a retracted state in which the locking element is at least partially recessed into the sleeve, and

[0052] o an extended state in which the locking element protrudes from the sleeve,

[0053] The connector is adapted to clamp the module plate between the third and fourth sets of locking elements when the third and fourth sets of locking elements are in an extended state, thereby allowing the connector to be releasably connected to the module.

[0054] This means that, in addition to the locking elements of the first group, the connector further comprises a locking element of the third group and a locking element of the fourth group. The locking elements of the third group and the locking elements of the fourth group are respectively arranged at the third longitudinal position and the fourth longitudinal position between the head component and the locking elements of the first group. To this end, the sleeve comprises one or more openings at the third longitudinal position and the fourth longitudinal position. The locking elements of the third group and the locking elements of the fourth group can have various shapes. In one embodiment, the locking elements of the third group and the locking elements of the fourth group have a shape similar to the locking elements of the first group, and thus include a flat surface on one side or both sides. In this case, the openings at the third longitudinal position and the fourth longitudinal position, respectively, are arranged as circumferential slits. In another embodiment, the locking elements of the third group and the locking elements of the fourth group have a circular shape and are therefore provided as balls. In this case, the openings at the third longitudinal position and the fourth longitudinal position, respectively, can be circular openings. The locking elements of the third group and the locking elements of the fourth group can be connected to each other or can be separated from each other. The mutual distance between the third longitudinal position and the fourth longitudinal position allows the board of the module to be assembled therebetween. In particular, when the locking elements are in an extended state, the board can be clamped between the locking elements of the third group and the locking elements of the fourth group. In this way, after disassembling the temporary building, the connector can be releasably connected to the single module. In fact, the connector can be inserted through the connection hole of the single module when the locking elements are in a retracted state, and when the locking elements of the third group and the locking elements of the fourth group are located on two opposite sides of the module plate, the locking elements are extended. Therefore, the module plate is clamped between the locking elements of the third group and the locking elements of the fourth group, respectively. This has the advantage that after disassembling the temporary building, during transportation or storage, the connector can be connected to the module. By holding the connector in this way, the connector is prevented from being separated from the frame module or lost.

[0055] Optionally,

[0056] - each opening at the third longitudinal position and each opening at the fourth longitudinal position is a circumferential slit;

[0057] - Each of the locking elements of the third group and the locking elements of the fourth group comprises a flat surface, so that when the locking elements of the third group and the locking elements of the fourth group are in an extended state, the associated protruding flat surfaces together define a pair of retaining surfaces located in a transverse plane and facing each other, and the connector is adapted to clamp the module board between the two retaining surfaces, thereby allowing the connector to be releasably attached to the module. This means that, just like the locking elements of the first group, the locking elements of the third group and the locking elements of the fourth group have flat surfaces. For example, the locking elements of the third group or the locking elements of the fourth group have one flat side or two opposite flat sides. The module board can be clamped between the flat surfaces of the locking elements of the third group and the flat surfaces of the locking elements of the fourth group. This ensures a reliable clamping of the connector during transportation or storage without deformation in the frame.

[0058] Optionally,

[0059] any one of the one or more circumferential slits at the third longitudinal position together with the corresponding circumferential slit at the fourth longitudinal position forms a single circumferential slit extending between the third and fourth longitudinal positions, and

[0060] - Any locking element of the third set is connected to a corresponding locking element of the fourth set via an intermediate element, wherein each of the one or more intermediate elements comprises a top surface facing away from the sleeve and parallel to the longitudinal direction.

[0061] This means that any locking element of the third group is connected to the locking element of the fourth group via the intermediate element. The combined locking elements are arranged in a circumferential slit extending between the third longitudinal position and the fourth longitudinal position. In this way, when the module board is clamped between the locking elements of the third group and the locking elements of the fourth group, the module board can also be clamped on the intermediate element. This allows the connector to be held in a more secure manner, without loosening and less affected by vibrations. In addition, providing a wider slit will result in a more robust sleeve design and improved manufacturability. In fact, the use of two separate narrow slits will result in small parts of the sleeve material, which are not only difficult to manufacture but also form weak points, while the use of a wider slit avoids this problem.

[0062] In one embodiment, any locking element of the third group and any locking element of the fourth group include a curved edge away from the sleeve, and the curved edge has a cross section corresponding to a circular arc. In a further embodiment, the third group of locking elements and the fourth group of locking elements each include two separate locking elements, and the two separate locking elements are opposite to each other in the cross section. In a further embodiment, the third longitudinal position and the fourth longitudinal position are both between the first longitudinal position and the second longitudinal position. This means that when a connector comprising a locking element of the first group, a locking element of the second group, a locking element of the third group and a locking element of the fourth group is provided, the third group and the fourth group are positioned between the second group and the first group.

[0063] Optionally, any locking element of the third group and any locking element of the fourth group have an angular position rotated more than 90 degrees relative to a locking element of the first group. This means that in the front view of the extended state of the connector and all locking elements, the center point or center of the locking element of the third group and the locking element of the fourth group is rotated 90 degrees relative to the center point or center of the locking element of the first group. In one embodiment, the locking element of the first group, the locking element of the third group and the locking element of the fourth group contain the same number of locking elements, so that any locking element of the third group and any locking element of the fourth group correspond to another locking element of the first group respectively, and the angular position of the former is rotated more than 90 degrees relative to the latter. In one embodiment, any locking element of the third group and any locking element of the fourth group have the same shape as one of the locking elements of the first group, but have an angular position rotated more than 90 degrees. In one embodiment, the connector includes the locking element of the first group, the locking element of the second group, the locking element of the third group and the locking element of the fourth group, wherein the locking element of the second group, the locking element of the third group and the locking element of the fourth group have the same angular position or direction, and the locking element of the first group has an angular position rotated more than 90 degrees relative to the locking element of the other groups.

[0064] Optionally, the connector further comprises a third linear cam assembly, for each locking element of the third set, the third linear cam assembly comprising:

[0065] - a cam element comprising a ramp inclined relative to the longitudinal direction;

[0066] a follower in contact with the cam element and adapted to slide along the surface of the ramp so that moving the cam element in the longitudinal direction causes a translational movement of the follower according to a direction perpendicular to the longitudinal direction,

[0067] Wherein, any cam element of the third linear cam assembly is contained in the internal body, and any follower of the third linear cam assembly is contained in the locking element of the third group, thereby allowing any locking element of the third group and any locking element of the fourth group to translate according to a direction perpendicular to the longitudinal direction by moving the internal body in the longitudinal direction. This means that, similar to the locking elements of the first group, the linear cam mechanism is used to move the locking elements of the third group and the locking elements of the fourth group between a retracted state and an extended state. In this case, any locking element of the third group is connected to the corresponding locking element of the fourth group, thereby allowing the two locking elements to move simultaneously by sliding along the follower on the cam element.

[0068] Optionally, the longitudinal position of one or more cam elements of the first linear cam assembly and the longitudinal position of one or more cam elements of the third linear cam assembly are such that moving the inner body in the longitudinal direction causes the locking elements of the first group and the locking elements of the third group and the locking elements of the fourth group to translate sequentially. This means that the two cam assemblies are designed and positioned so that when the inner body is moved forward or backward, the locking elements of the third group and the locking elements of the first group do not move simultaneously, but move in a sequential, asynchronous manner. This means that, similar to the delay that exists between the locking elements of the second group and the locking elements of the first group, there is also a delay between the contraction of the elements of the first group and the contraction of the elements of the second group. Or in other words, after the connector is inserted through the connecting hole, the locking elements of the first group will be extended first, followed by the extension of the locking elements of the third group and the locking elements of the fourth group. In this way, it can be ensured that the locking elements of the first group will always move to the extended state without being hindered by other locking elements.

[0069] In one embodiment, the connector includes a first group of locking elements, a second group of locking elements, a third group of locking elements, and a fourth group of locking elements, wherein the second group of locking elements, the third group of locking elements, and the fourth group of locking elements translate simultaneously, while the first group of locking elements translates successively relative to the other groups of locking elements.

[0070] According to a second aspect of the present invention, there is provided a system for releasably connecting frame modules in a modular system for temporary construction, the system comprising:

[0071] - at least one connector according to the first aspect of the invention;

[0072] - at least two frame modules, wherein the first frame module and the second frame module each comprise at least one column, wherein

[0073] o Any column has a flat back surface and a flat front surface extending in the height direction and the lateral direction;

[0074] o Any post includes one or more holes extending longitudinally between the back and front sides, and

[0075] The connector is suitable for:

[0076] - with the locking elements in the retracted state, inserted through corresponding holes in the two frame modules, and

[0077] - With the locking element in the extended state, the two posts are clamped together, with the front faces of the respective posts in contact and both the head clamping surface and the rear clamping surface of the connector engaging the rear faces of the respective posts.

[0078] This means that the system allows two frame modules to be connected by means of the connector of the invention. Each frame module comprises at least one column, which may be hollow or solid. In the connected state, the two columns are positioned with their front surfaces facing each other and the connector is arranged through the corresponding connection hole. A first clamping surface of the connector provided by the head part comes into contact with the back side of the first column, and a second clamping surface of the connector provided by the first set of locking elements comes into contact with the back side of the second column. Thus, the connector passes through the interior of the two columns and clamps the columns at their back sides. This means that the sleeve of the connector is sufficiently long; its length is particularly adapted to the longitudinal dimension of two adjacent columns. By using such a long sleeve, the connector allows a connection to be provided that is sufficiently resistant to bending loads and to torsion. In fact, the long sleeve body spans the entire column of the two modules, thereby preventing the modules from twisting under torsional loads.

[0079] Optionally, each of the two columns is hollow. Thus, the column of the frame module comprises a front plate and a rear plate parallel to each other, with a cavity between the front plate and the rear plate, wherein both the front plate and the rear plate comprise an inner surface and an outer surface, the inner surface of the front plate and the rear plate facing the cavity, and the outer surface of the front plate and the rear plate facing away from the cavity. In this case, the outer surface of the rear plate corresponds to the back side of the column, and the outer surface of the front plate corresponds to the front side of the column.

[0080] Optionally, in the connected state of the frame module, the rear plate and the front plate of the corresponding column are positioned between a head clamping surface defined by the head part of the connector and a central clamping surface defined by the locking elements of the second group. In this case, each of the two columns is hollow and the connector comprises locking elements of the first group and locking elements of the second group, the locking elements of the second group defining the central clamping surface. In the connected state, the locking elements of the second group are located in the cavity of the second column and close to the inner surface of the front plate. In this way, the locking elements of the second group contribute to the clamping of the module. In fact, during the impact, the clamping will be carried out in two different positions: in the position between the head part and the locking elements of the first group, and in the position between the head part and the locking elements of the second group.

[0081] Optionally, one or more blocking elements are connected to the inner surface of the front plate and / or the rear plate of any frame module, each blocking element protruding from the inner surface and extending in the longitudinal direction, so that when the frame module is in the connected state, rotating the connector around the longitudinal direction causes at least one locking element of the second group of locking elements to engage with at least one blocking element of the blocking element, thereby blocking further rotation of the connector. In this case, each of the two columns is hollow, and the connector includes a locking element of the first group and a locking element of the second group. Each frame module includes one or more blocking elements. For example, two blocking elements are connected to the inner surface of the front plate on opposite sides of the hole, and each of the two blocking elements includes a flat surface extending in the longitudinal direction and extending in the height direction. After the connector is inserted through the connection hole, the locking elements of the second group are in an extended state. When the connector is rotated around its axis, the locking elements of the second group will engage with the blocking elements, thereby preventing further rotation of the connector. In this way, the clamping length can be adjusted in a convenient way by screwing the head component without being hindered by rotating the connector. In addition, the preferred angular position of the connector can be ensured. For example, the locking elements of the second set may be arranged such that when preventing further rotation, the locking elements of the first set clamp on a preferred surface of the frame module, for example on the side of the aperture where the frame has the highest strength.

[0082] Optionally,

[0083] - the sleeve of the connector comprises longitudinal grooves on its outer surface;

[0084] - the system comprises at least one retaining clip adapted to be arranged in any hole, the retaining clip comprising a protrusion,

[0085] Wherein, the protrusion and the longitudinal groove are adapted to form a tongue-and-groove connection between the retaining clip and the connector, thereby allowing the connector to move in the longitudinal direction over the length of the groove while preventing the connector from rotating around the longitudinal direction. Therefore, the central part of the sleeve includes a straight groove extending in the longitudinal direction, which has two outer ends. The retaining clip can be arranged in the connection hole through the cavity of the hollow frame column. By inserting the protrusion of the clip into the groove of the connector, the connector can only move forward and backward over the length of the groove. Therefore, the connector can be moved to separate two modules, but after disassembly, the connector is still connected to one of the modules. In this way, the connector is prevented from being lost, for example, during the disassembly process of a temporary building. In addition, the protrusion and the groove only allow the connector to translate in the longitudinal direction while preventing rotational movement. In this way, the retaining element constitutes a replacement element for the locking element of the second group, which is used to stop the rotation of the connector and fix it in the connection hole.

[0086] Optionally, the back plate of any frame module is adapted to be clamped between the locking elements of the third group and the locking elements of the fourth group when the locking elements of the third group and the locking elements of the fourth group are in an extended state. In this case, each of the two columns is hollow and the connector includes the locking elements of the first group, the locking elements of the third group and the locking elements of the fourth group. The longitudinal spacing between the third group and the fourth group and the thickness of the back plate of the frame module are such that the back plate can be clamped between the locking elements of the third group and the locking elements of the fourth group. In this way, when being held during transportation or storage, the connector can be positioned so that it extends into the interior of the rectangular frame and at least partially into the cavity of the frame column.

[0087] Optionally, the third and fourth longitudinal positions are such that, when the sleeve is inserted into any hole and the rear plate is clamped between the locking elements of the third and fourth groups, the rear outer end of the sleeve does not protrude beyond the outer surface of the front plate. Therefore, the positions of the locking elements of the third and fourth groups and the length of the sleeve are such that when the connector is held during transport or storage, the rear end of the sleeve does not protrude beyond the front plate of the column of the module. In this way, the attached connector does not hinder the module when the modules are being handled or stacked. On the other hand, it is preferred that the locking elements of the third and fourth groups are not too close to the rear outer end of the sleeve, thereby avoiding excessive cantilevering of the connector when it is held by the frame module.

[0088] According to a third aspect of the present invention, there is provided a use of a connector, which is a connector according to the first aspect of the present invention. The use relates to the use of the connector for releasably connecting modules in a modular system for temporary buildings. In one embodiment, the use relates to the use of the connector for releasably connecting frame modules in a modular system for temporary exhibition stands. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figures 1 to 3 A 3D view of a connector according to an embodiment of the present invention is provided.

[0090] Figure 4 A 3D view of the internal mechanism of a connector according to an embodiment of the present invention is provided.

[0091] Figure 5 , Figure 6 , Figure 8 and Fig. 9 A longitudinal cross section of a connector according to an embodiment of the present invention is shown.

[0092] Figure 7 (a) and Figure 7 (b) provides a front view of a connector according to an embodiment of the present invention.

[0093] Figure 7 (c) and Fig.10 3D views of locking elements included in a first locking element group, and 3D views of locking elements included in a third locking element group and a fourth locking element group are respectively provided according to an embodiment of the present invention.

[0094] Fig.11 A 3D view of a frame module according to an embodiment of the present invention is provided.

[0095] Fig.12 A front view of two frame modules in accordance with an embodiment of the present invention is provided, the two frame modules being coupled to the intersection of two centrally located frame columns.

[0096] Fig.13 A 3D view of two frame modules connected by a connector according to an embodiment of the present invention is provided.

[0097] Fig.14 A cross section according to the XZ plane of two connected frame columns according to an embodiment of the present invention is provided, as well as a side view of an installed connector.

[0098] Fig.15 A cross section according to the XY plane of two connected frame modules according to an embodiment of the present invention is provided, as well as a top view of an installed connector.

[0099] Fig.16 The arrangement of the blocking element in the frame column according to an embodiment of the present invention is shown.

[0100] Fig.17 A cross section according to the XZ plane of a frame column according to an embodiment of the invention is provided, as well as a side view of a connector held by a frame module.

[0101] Fig.18 A 3D view of a retaining clip according to an embodiment of the present invention is provided.

[0102] Fig.19 A 3D view of a retaining clip installed on a connector according to an embodiment of the present invention is provided.

[0103] Fig. 20 A cross section according to the XZ plane of a frame column according to an embodiment of the present invention is provided, as well as a side view of a connector retained by a retaining clip. DETAILED DESCRIPTION

[0104] Figures 1 to 3A connector 100 according to an embodiment of the present invention is shown. The connector 100 comprises a hollow sleeve 108 extending in a longitudinal direction X between a front outer end 200 and a rear outer end 201. An inner body 400 is arranged inside the hollow sleeve 108, wherein some parts of the inner body 400 protrude from the sleeve 108 at the front outer end 200. The inner body 400 is movable in the X direction relative to the sleeve 108. The connector 100 further comprises a head component 109, which is screwed to the front outer end 200 of the sleeve 108. For this purpose, threads 111 and 202 are provided on the head component 109 and the sleeve 108, respectively. The head component 109 comprises a flat surface 110 used as a front clamping surface. Figure 2 The sleeve 108 is shown without the head part 109 attached. The sleeve comprises a cylindrical central portion 204, which is provided with a longitudinal groove 206. The central portion 204 is located between the portion 203 at the front outer end 200 and the portion 205 at the rear outer end 201, the portion 205 having a conical shape. In the embodiment shown, the length of the sleeve 108 measured in the X direction between the outer end 200 and the outer end 201 is 143 mm. The diameter of the central portion 204 of the sleeve 108 is 30 mm. The distance measured in the X direction between the outer end of the inner body 400 (on the left side of the figure) and the rear outer end 201 of the sleeve 108 varies between 169 mm and 161 mm.

[0105] The sleeve 108 includes two circumferential slits 105, 112 at a first longitudinal position. Each circumferential slit 105, 112 is an elongated opening that covers a portion of the circumference of the sleeve 108. The sleeve 108 includes two circumferential slits at a second longitudinal position, of which only slit 106 is located at the bottom. Figure 1 Circumferential slit 106 is an elongated opening that covers a portion of the circumference of sleeve 108. Sleeve 108 includes two circumferential slits at a third longitudinal position, of which only slit 107 is located at the third longitudinal position. Figure 1 Circumferential slit 107 is an elongated opening that covers a portion of the circumference of sleeve 108. As shown, slit 107 is wider than slits 105 and slit 106.

[0106] The connector 100 includes a first locking element group 101, which is located at a first longitudinal position near the rear outer end 201. The first locking element group 101 includes two separate locking elements 301 and a locking element 305, which are opposite to each other in cross section. The locking element 301 is arranged in the circumferential slit 112, and the locking element 305 is arranged in the circumferential slit 105. The locking element 305 includes a flat surface 310 located in a transverse plane. The transverse plane is a plane perpendicular to the longitudinal direction X. The flat surface 310 faces the head component 109. As shown in FIG. Figure 7As shown, the locking element 305 comprises a second opposite flat surface 701 parallel to the flat surface 310. Thus, the locking element 305 has two flat sides 301 and 701. In addition, the locking element 305 comprises a curved edge 700. The shape of the other locking element 301 of the first set 101 is the same as the shape of the locking element 305.

[0107] The connector 100 further includes a second locking element group 102 located at a second longitudinal position, which is located between the head component 109 and the first locking element group 101. The second locking element group 102 includes two separate locking elements 302 and a locking element 306, which are opposite to each other in cross section. The locking element 302 is arranged in the circumferential slit 106. Similarly, the locking element 306 is arranged in a circumferential slit that is not visible in the figure. The shapes of the locking element 302 and the locking element 306 are similar to the shape of the locking element 305. In particular, the locking element 302 and the locking element 306 both have two opposite flat sides and a curved edge. Regarding the locking element 302, in Figure 3 109 is shown in the figure. The flat surface 309 is located in the transverse plane and faces the head part 109. The locking elements 302 of the second group 102 have an angular position rotated more than 90 degrees relative to the locking elements 301 of the first group 101. The locking elements 306 of the second group 102 have an angular position rotated more than 90 degrees relative to the locking elements 305 of the first group 101.

[0108] The connector 100 further includes a third locking element group 103 located at a third longitudinal position and a fourth locking element group 104 located at a fourth longitudinal position. The third longitudinal position and the fourth longitudinal position are located between the first longitudinal position and the second longitudinal position. The third locking element group 103 includes two separated locking elements 303 and a locking element 307, and the locking elements 303 and the locking elements 307 are opposite to each other in cross section. The fourth locking element group 104 includes two separated locking elements 304 and a locking element 308, and the locking elements 304 and the locking elements 308 are opposite to each other in cross section. Fig.10As shown, the locking element 303 and the locking element 304 are connected by the intermediate element 1004. The locking element 303 and the locking element 304 and the intermediate element 1004 all have curved edges. The locking element 303 includes a flat surface 1002 facing the other locking element 304. The locking element 304 includes a flat surface 1003 facing the other locking element 303. In addition, the locking element 303 and the locking element 304 all have two flat sides perpendicular to the longitudinal direction. The locking element 303 and the locking element 304 together form a single element 405, which is arranged in the wider circumferential slit 107. The design of the locking element 307 and the locking element 308 is the same as that of the locking element 303 and the locking element 304. The element 405 has an angular position rotated more than 90 degrees relative to the locking element 301 of the first group 101. The elements 307-308 of the third group / fourth group 103-104 have an angular position rotated more than 90 degrees relative to the locking element 305 of the first group 101. In the illustrated embodiment, element 405 has the same angular position as the second locking element group 302, and elements 307-308 have the same angular position as locking element 306 or the second locking element group. In other words, the third locking element group, the fourth locking element group, and the second locking element group all have the same orientation relative to the sleeve 108, while the first group has an orientation rotated more than 90 degrees.

[0109] Figure 3 The connector 100 is further shown to include a button 314. Figure 3 (b), the button 314 is pushed, and all the locking elements 101-104 are in a retracted state or a retracted state. In the retracted state, the locking elements 101-104 are recessed in the sleeve 108, so they do not protrude beyond the outer surface of the sleeve, which also Figure 7 (b) Figure 6 and Fig. 9 In this case, the connector can be inserted through the connection hole of the adjacent module, which will be explained further below. Figure 3 In (a), the button 314 is released and all the locking elements 101-104 are in the extended state. In the extended state, the locking elements 101-104 protrude beyond the outer surface of the sleeve, which also Figure 7 (a) Figure 5 and Figure 8 In this case, the column of the module is clamped between the flat surface 110 of the head part 109 and the protruding flat surface 310 of the first locking element group 101, as will be explained further below.

[0110] Figures 4 to 10The internal mechanism of the connector 100 is shown, which is used to move the locking elements 101-104 between the extended state and the retracted state, and vice versa. The connector 100 includes an internal body 400, which can be moved in the longitudinal direction X by a button 314. The connector 100 further includes a spring 404, which is arranged in the sleeve 108, located at the rear outer end 201 of the sleeve 108. When the internal body 400 is moved to the right side in the figure by pressing the button 314, the spring 404 is compressed. Moving the internal body 400 to the right side in the figure means that the part of the internal body 400 inside the hollow sleeve 108 moves toward the rear outer end 201 of the sleeve 108. When the button 314 is released, the internal body 400 moves to the left side in the figure due to the spring force generated by the compression spring 404. Moving the internal body 400 to the left side in the figure means that the part of the internal body 400 inside the hollow sleeve 108 moves toward the front outer end 200 of the sleeve 108.

[0111] The connector 100 includes a first linear cam assembly 401, a second linear cam assembly 402, and a third linear cam assembly 403, which are used to move the first group 101 of locking elements, the second group 102 of locking elements, and the third-fourth groups 103-104 of locking elements, respectively. Figure 5 and Figure 6 As shown, the first linear cam assembly 401 includes a cam element 500 and a follower 504 constituting a linear cam for moving the locking element 305, and includes a cam element 501 and a follower 505 constituting a linear cam for moving the locking element 301. The cam element 500 is arranged as a recess or groove in the inner body 400, which has a ramp or inclined surface 502 terminating in a flat tail. The ramp 502 is inclined relative to the longitudinal direction X and relative to the transverse plane. The follower 504 contacts the cam element 500 and is adapted to slide along the surface 502 of the ramp. In particular, in Figure 7 As can be seen in FIG. 5 , the follower 504 comprises two pins 702 adapted to guide the follower 504 in the groove 500 . The follower 504 forms part of the locking element 305 , and is therefore adapted to move the locking element 305 up and down relative to the sleeve 108 .

[0112] Figure 5 and Figure 6 This change of position of the locking elements 305, 301 is shown in FIG. Figure 5 In FIG. 5 , see 507 , the button 314 is released and the locking elements 305 , 301 are in an extended state. See 506 , the spring 404 is in a partially compressed state. Figure 6In the embodiment, see 607, the button 314 is pressed and the locking elements 305, 301 are in a retracted state. See 606, the spring 404 is in a fully compressed state. The position of the inner body 400 is changed from Figure 5 Change to Figure 6 , so that the cam elements 500, 501 move to the right in the figure. Thus, by sliding along the ramps 502, 503, the followers 504, 505 translate in transverse planes (these translations are each perpendicular to the longitudinal direction X), and the locking elements 305, 301 are recessed in the sleeve 108. Similarly, when the position of the inner body 400 is changed from Figure 6 Change to Figure 5 When the locking elements 301 and 305 are in an extended state, the followers 504 and 505 move upward relative to the sleeve 108 under the action of the spring force.

[0113] Figure 7 (a) Provides the corresponding Figure 5 , wherein the locking elements 301, 305 are in an extended state. Figure 7 (b) provides the corresponding Figure 6 , wherein the locking elements 301, 305 are in a retracted state. Figure 7 (a) and Figure 7 (b) shows a curved edge 700 of the locking element 305 corresponding to a circular arc. Figure 7 (b) shows that in the retracted state, the curved edge 700 lies on a circle 703 that is concentric with the circular cross-section of the sleeve 108 . Figure 7 (b) also shows that the arc of the edge 700 corresponds to about one-quarter of a full circle, thereby providing a sufficiently large clamping surface of the locking element while allowing the locking element to be retracted into the sleeve. Similarly, the other locking elements of the first group, the other locking elements of the second group, the other locking elements of the third group, and the other locking elements of the fourth group also have circular edges corresponding to about one-quarter of a full circle.

[0114] The second linear cam assembly 402 and the third linear cam assembly 403 operate in a manner similar to the first linear cam assembly 401. Figure 8 and Fig. 9 As shown, the second linear cam assembly 402 comprises a cam element 800 and a follower 802. The cam element 800 is arranged as a recess or groove in the inner body 400, which has a ramp or inclined surface 801. The ramp 801 is inclined relative to the longitudinal direction X and relative to the transverse plane. The follower 802 constitutes a part of the locking element 302. Similar to the locking element 305, the locking element 302 comprises a pin 702 adapted to guide the follower 802 in the groove 800.

[0115] Further, the third linear cam assembly 403 comprises a cam element 803 and a follower 805. The cam element 803 is arranged as a recess or groove in the inner body 400, which has a ramp or inclined surface 804. The ramp 804 is inclined relative to the longitudinal direction X and relative to the transverse plane. The follower 805 constitutes a part of the locking element 405. Fig.10 It is shown that the locking element 405 comprises a pin 1000 adapted to guide the follower 805 in the groove 803 .

[0116] exist Figure 8 In FIG. 8 , see 807 , the button 314 is released and the locking elements 302 , 405 are in an extended state. See 806 , the spring 404 is in an uncompressed state. Fig. 9 In the embodiment, see 907, the button 314 is pressed and the locking elements 302, 405 are in a retracted state. See 906, the spring 404 is in a partially compressed state. The position of the inner body 400 is changed from Figure 8 Change to Fig. 9 , so that the locking elements 302, 405 are translated in the transverse plane according to a direction perpendicular to the X direction, thereby being recessed in the sleeve 108. Similarly, when the position of the inner body 400 is changed from Fig. 9 Change to Figure 8 When the locking elements 302 and 405 are in an extended state, under the action of the spring force.

[0117] exist Figure 8 In the state, the spring 404 is completely uncompressed and does not exert any elastic force. All locking elements are in an extended state. When the button 314 is pressed, the state changes from Figure 8 becomes Fig. 9 , then becomes Figure 5 and Figure 6 , thereby gradually compressing the spring 404. Fig. 9 When the state of the second locking element group 102, the third locking element group 103 and the fourth locking element group 104 are retracted first. Only after some delay, when the state of the second locking element group 102, the third locking element group 103 and the fourth locking element group 104 are retracted first. Figure 6 , the locking elements of the first group 101 also retract. Therefore, the linear cam assembly is positioned and designed so that pushing the button 314 causes a sequential movement of the locking elements, with the first group 101 being retracted last. Similarly, when the button 314 is released, the first locking element group 101 is extended first, followed by the other locking elements after some delay. In this way, it is ensured that the locking elements of the first group 101 will always reach their extended position, even if the extension of one of the other elements will be prevented.

[0118] Fig.11An example of a frame module 1100 extending in a longitudinal direction X, a transverse direction Y, and a height direction Z is provided. The frame module 1100 has a rectangular frame consisting of four interconnected columns and defining a central opening 1105. One such column is indicated as 1101 in the figure. The face of the column 1101 parallel to the YZ plane and facing the central opening 1105 is referred to as the back face 1103 of the column 1101. The face of the column 1101 parallel to the YZ plane and opposite to the back face 1103 is referred to as the front face 1102 of the column 1101. A connection hole 1104 extends in the longitudinal direction between the back face 1103 and the front face 1102.

[0119] Fig.12 A front view of two frame modules 1201, 1202 is provided, each of which has a square frame and a central opening 1217, 1218. Frame module 1201 includes a hollow column 1203 and frame module 1202 includes a hollow column 1204. Fig.12 The center of FIG. 1 shows the intersection of two columns 1203 and 1204. Fig.13 A 3D view of these frame modules 1201, 1202 in a connected state is provided.

[0120] The hollow column 1203 comprises a rear plate 1207, which is a plate near the central opening 1217. The rear plate 1207 has an outer surface 1215 facing the central opening 1217 and an inner surface 1213 with an inner cavity facing the column 1203. The outer surface 1215 of the rear plate 1207 corresponds to the back side of the column 1203. In addition, the hollow column 1203 comprises a front plate 1205, which is a plate at the outer limit of the frame module. The front plate 1205 has an outer surface 1209 facing the outside and an inner surface 1211 with an inner cavity facing the column 1203. The outer surface 1209 of the front plate 1205 corresponds to the front side of the column 1203. Both the rear plate 1207 and the front plate 1205 comprise a series of holes 1300, wherein the holes of the rear plate are aligned with the holes of the front plate.

[0121] Similarly, the hollow column 1204 includes a rear plate 1208, which is a plate near the central opening 1218. The rear plate 1208 has an outer surface 1216 facing the central opening 1218 and an inner surface 1214 having an inner cavity facing the column 1204. In addition, the hollow column 1204 includes a front plate 1206, which is a plate at the outer limit of the frame module. The front plate 1206 has an outer surface 1210 facing the outside and an inner surface 1212 having an inner cavity facing the column 1204.

[0122] Fig.13The connector 100 is shown in an installed state, wherein the sleeve 108 extends through the hole 1300. In the embodiment shown, the diameter of the hole 1300 is 31 mm. Prior to insertion into the hole 1300, the button 314 is pressed, thereby retracting all locking elements so that the connector can be inserted through the hole 1300. Next, the button 314 is released, thereby placing the locking elements in an extended state.

[0123] Fig.14 and Fig.15 It is shown that in the connected state, the front plates 1205 and 1206 of the two modules are pushed together: the outer surface 1209 of the front plate 1205 is in contact with the outer surface 1210 of the front plate 1206. Furthermore, the connector 100 is shown clamped at the back plates 1207, 1208 of the two columns 1203, 1204. Here, the flat surface 110 of the head part 109 serves as a first clamping surface, which is in contact with the outer surface 1215 of the back plate 1207. The flat surface 310 provided by the first locking element set 101 serves as a second clamping surface, which is in contact with the outer surface 1216 of the back plate 1208. In this way, the columns 1203, 1204 of the module are clamped between the flat clamping surfaces 110, 310, thereby providing an evenly distributed stress in the back plate and providing an increased resistance to tensile loads. Additionally, because connector 100 has a substantial length, the connector spans across two posts 1203 and 1204, thereby providing increased resistance to torsional loads.

[0124] After the connector 100 is set up, its clamping length can be adjusted by turning the head part 109. In fact, due to the presence of the threads 111 and 202, the head part can be moved in the longitudinal direction, thereby moving the clamping surface 110. In this way, any play or tolerance can be compensated. In the embodiment shown, the width of the column 1203 between the outer surface 1215 of the rear plate 1207 and the outer surface 1209 of the front plate 1205 measured in the X direction is 65.5 mm. Therefore, the clamping length between the flat surfaces 110 and 310 measured in the X direction is of the order of 131 mm, and this clamping length can be slightly adjusted by screwing the head part 109.

[0125] Fig.14 and Fig.15It is further shown that in the connected state, the locking elements 306, 309 of the second group 102 are positioned close to the inner surface 1212 of the front plate 1206 of the column 1204. Therefore, the rear plate 1207 of the column 1203 and the front plate 1206 of the other column 1204 are positioned between the head clamping surface 110 defined by the head component 109 and the central clamping surface 309 defined by the second locking element group 102. In the illustrated embodiment, the locking elements 306, 309 are not in direct contact with the front plate 1206, but are located at a distance of about 0.5 mm from the front plate. Therefore, under normal circumstances, the clamping of the module relies only on the first locking element group 101, and the second locking element group 102 is not used to clamp the columns 1203, 1204. However, once some impact occurs, the locking elements 306, 309 will contact the front plate 1206, thereby facilitating the clamping and preventing the release of the connector 100. Therefore, advantageously, the locking elements of the second set 102 also have a flat surface 309 .

[0126] Fig.15 and Fig.16 The columns 1203, 1204 of each module are shown to include blocking elements 1500, 1501. In practice, a straight edge 1500 is attached to the inner surface 1212 of the front plate 1206 and protrudes from the inner surface 1212. The straight edge 1500 extends in the height direction and is parallel to the longitudinal direction X and the height direction Z. Another straight edge 1502 parallel to the transverse direction Y and the height direction Z is attached to the edge 1500. The edge 1500 and the edge 1502 together form a step in the cavity of the column 1204. The presence of the step is due to the groove 1504 extending in the height direction Z on the outside of the column 1204. Similarly, an internal step is formed on the opposite side by the edge 1501 and the edge 1503. Fig.16 It is shown that when the connector 100 is rotated about its axis, the locking elements 302 , 306 of the second set 102 hit the edge 1501 and the edge 1500 , thereby preventing further rotation of the connector 100 .

[0127] Therefore, when the rotation of the connector 100 is blocked by the blocking elements 1501, 1500, the head component 109 can be easily rotated to adjust the clamping length. In addition, in this way, the second locking element group 102 and the blocking elements 1500, 1501 jointly determine the preferred orientation of the connector 100 in the hole 1300. In fact, Fig.16It is shown that due to the obstruction, the clamping by the locking elements of the first group 101 occurs at a portion 1600 of the rear plate close to the corner of the column, rather than at the middle portion 1601 between two connection holes 1300. This is due to the fact that the locking elements of the first group 101 are rotated more than 90 degrees compared to the locking elements of the second group 102. The clamping at the portion 1600 is advantageous because the portion 1600 close to the corner of the column has an increased strength compared to the middle portion 1601.

[0128] Finally, note that due to the presence of blocking elements 1500, 1501, it may happen that the second set 102 of locking elements are not extended immediately after releasing button 314. For this reason, the delay described above is implemented with respect to the linear cam assembly, ensuring that the first set 101 of locking elements is always shown first.

[0129] Fig.17 It is shown how the connector 100 is held via a separate frame module 1201 by the third set 103 of locking elements and the fourth set 104 of locking elements. In this state, the module with the attached connector 100 can be stored or transported after disassembly of the temporary building. Fig.17 The rear plate 1207 of the column 1203 is shown clamped between the locking elements 303, 307 and 304, 308, which are in an extended state. In particular, the rear plate 1207 is clamped between the flat surfaces 1002 and 1003 of the locking element 405. In addition, when clamped, the inner circumference of the hole 1300 is clamped against the intermediate element 1004, thereby ensuring increased stability of the connector 100 during transportation.

[0130] Fig.17 It is further shown that in the transport or storage state, the front end of the connector 100 with the attached head component 109 extends into the central opening 1217 of the module 1201. In addition, the rear end of the connector with the tapered end is located in the cavity inside the column 1203. Therefore, the connector does not protrude beyond the outer surface 1209 of the front plate 1205. In particular, the third locking element group 103 and the fourth locking element group 104 are positioned so that, on the one hand, the rear outer end of the connector does not protrude beyond the front plate 1205, and on the other hand, the length of the connector positioned in the central opening 1217 is relatively limited. In this way, the attached connector 100 does not hinder the module from being handled or stacked, while avoiding excessive cantilevering of the connector during transport or storage.

[0131] Figures 18 to 20 How the retaining clips 1800 , 1900 may be used in conjunction with the connector 100 is shown. Fig.18A 3D view of a retaining clip 1800 is provided. The retaining clip 1800 comprises a surface 1803 having protrusions 1801 and 1802 on either side, respectively. Fig.19 The sleeve 108 is shown to include two longitudinal grooves 206 and 1901 on its outer surface. Two additional grooves are provided on the other side of the sleeve 108 (in Fig.19 1801). The groove 206 and the protrusion 1801 allow the protrusion 1801 to be inserted into the groove 206. In this way, a tongue-and-groove connection is formed between the retaining clip 1800 and the sleeve 108, wherein the connector can be displaced in the longitudinal direction X, but rotation of the connector is prevented. The connector 100 can be moved in the longitudinal direction over the length of the groove 206 between the outer ends 2000, 2001 of the groove 206.

[0132] Fig. 20 It is shown that two retaining clips 1800, 1900 can be set in the cavity of the column 1203 through the connection hole 1300. The connector 100 is attached to the frame module 1201 via the protrusions 1801, 1901 engaging with the grooves 206, 1901; the connector can only move in the longitudinal direction over the length of the grooves 206, 1901 and cannot be removed from the module. Fig. 20 In the case of a connector in a transport state or storage state (such as Fig.17 ), in which the front plate 1207 is clamped by the locking elements of the third group 103 and the locking elements of the fourth group 104. Therefore, after disassembly, the connector 100 remains attached to the frame module 1201, thereby preventing the connector from being lost after disassembly. On the other hand, when positioned between the retaining clips 1800, 1900, the connector can be moved in the longitudinal direction when the locking clips are contracted, thereby allowing the module 1201 to be connected to another module 1202. When the modules 1201, 1202 are in the connected state, the retaining clips 1800, 1900 prevent the connector 100 from rotating around its axis. In this way, the retaining clips ensure the preferred orientation of the connector in the hole 1300. Therefore, the use of the retaining clips 1800, 1900 can replace the second locking element group 102 combined with the blocking elements 1500, 1501, as described with respect to Figure 15 to Figure 16 As explained.

[0133] Although the present invention has been described with reference to specific embodiments, it is obvious to those skilled in the art that the present invention is not limited to the details of the aforementioned exemplary embodiments, and the present invention can be implemented with various variations and modifications without departing from its scope. Therefore, the current embodiments are considered to be exemplary embodiments and not restrictive embodiments in all aspects, and the scope of the present invention is limited by the appended claims rather than by the previous description, and therefore, all changes within the meaning and scope of the equivalents of the claims are included therein. In other words, the present invention is intended to cover any and all modifications, changes or equivalents that fall within the scope of the basic principles and whose essential attributes are claimed in this patent application. The reader of this patent application will also understand that the word "including" does not exclude other elements or steps, the word "one" or "a" does not exclude the plural case, and a single element (such as a computer system, a processor or another integrated unit) can implement the functions of multiple devices listed in the claims. Any figure mark in the claims should not be interpreted as limiting the relevant individual claims. When used in the specification or claims, the terms "first", "second", "third", "a", "b", "c", etc. are introduced to distinguish similar elements or steps, and do not necessarily describe the order of succession or time. Similarly, the terms "top", "bottom", "above", "below", etc. are introduced for descriptive purposes and do not necessarily indicate relative positions. It should be understood that these terms can be used interchangeably as appropriate, and embodiments of the present invention can be operated in other sequences or in orientations different from those described or shown above in accordance with the present invention.

Claims

1. A connector (100) for releasably connecting two modules (1201, 1202) in a modular system for temporary construction, wherein: The connector (100) comprises: - a sleeve (108) extending in a longitudinal direction between a front outer end (200) and a rear outer end (201), the sleeve (108) comprising one or more circumferential slits (105, 112) at a first longitudinal position; a head piece (109) adapted to be attached to the front outer end (200) of the sleeve (108), the head piece (109) comprising a flat surface (110) defining, in the attached state, a front clamping surface situated in a transverse plane and facing the sleeve (108); - a first group (101) of one or more locking elements, each locking element (301, 305) of the one or more locking elements of the first group (101) comprising a flat surface (310), wherein the one or more locking elements of the first group (101) are arranged in the one or more circumferential slits (105, 112) at the first longitudinal position and are movable between o a retracted state in which the locking element (301, 305) is at least partially recessed within the sleeve (108), and o an extended state in which the locking elements (301, 305) protrude from the sleeve (108) such that associated protruding flat surfaces together define a rear clamping surface, the rear clamping surface being located in a transverse plane and facing the front clamping surface, The connector (100) is adapted to clamp the two module components (1203, 1204) between the front clamping surface and the rear clamping surface after the locking elements of the first group (101) are inserted through the corresponding holes (1300) in the module components (1203, 1204) in the retracted state.

2. The connector (100) according to claim 1, in, Any locking element (301, 305) of the first set (101) includes a curved edge (700) facing away from the sleeve (108).

3. The connector (100) according to any one of the preceding claims, in, The head component (109) and the front outer end (200) of the sleeve (108) both include threads (111, 202), so that the head component (109) can be moved in the longitudinal direction by screwing, thereby allowing the distance between the front clamping surface and the rear clamping surface to be adjusted.

4. The connector (100) according to any one of the preceding claims, in, The connector (100) further comprises: an internal body (400) which is at least partially arranged inside the sleeve (108) and is movable in the longitudinal direction, - a first linear cam assembly (401) comprising, for each locking element (301, 305) of the first set (101): o a cam element (500), the cam element (500) comprising a ramp (502) inclined relative to the longitudinal direction; o a follower (504) in contact with the cam element (500) and adapted to slide along the surface (502) of the ramp, such that moving the cam element (500) in the longitudinal direction causes the follower (504) to move according to a translation perpendicular to the longitudinal direction, Any cam element (500, 501) of the first linear cam assembly (401) is contained in the internal body (400), and any follower (504, 505) of the first linear cam assembly (401) is contained in the locking element (301, 305) of the first group (101), thereby allowing any locking element (301, 305) of the first group to translate in a direction perpendicular to the longitudinal direction by moving the internal body (400) in the longitudinal direction.

5. The connector (100) according to any one of the preceding claims, in: - the sleeve (108) comprises one or more openings (106) located at a second longitudinal position, the second longitudinal position being located between the first longitudinal position and the front outer end (200); The connector (100) comprises a second set (102) of one or more locking elements, wherein the one or more locking elements (302, 306) of the second set (102) are arranged in the one or more openings (106) of the sleeve (108) at the second longitudinal position and are movable between the following states: o a retracted state in which the locking element (302, 306) is at least partially recessed within the sleeve (108), and o an extended state in which the locking element (302, 306) protrudes from the sleeve (108).

6. The connector (100) according to claim 5, in: - each opening (106) at said second longitudinal position is a circumferential slit (106), and - Each locking element (302, 306) of the second set (102) comprises a flat surface (309) such that, in the extended state, the associated projecting flat surfaces jointly define a central clamping surface lying in a transverse plane and facing the front clamping surface.

7. The connector (100) according to claim 5 or 6, in, Any locking element (302, 306) of the second set (102) has an angular position rotated more than 90 degrees relative to one of the locking elements (301, 305) of the first set (101).

8. The connector (100) according to claims 5 to 7, in, The connector (100) further comprises a second linear cam assembly (402), for each locking element (302, 306) of the second set (102), the second linear cam assembly (402) comprising: - a cam element (800) comprising a ramp (801) inclined relative to the longitudinal direction; a follower (802) in contact with the cam element (800) and adapted to slide along the surface (801) of the ramp, such that moving the cam element (800) in the longitudinal direction causes the follower (802) to move according to a translation perpendicular to the longitudinal direction, wherein any cam element (800) of the second linear cam assembly (402) is contained in the inner body (400), and any follower (802) of the second linear cam assembly (402) is contained in the locking element (302) of the second group (102), so that by moving the inner body (400) in the longitudinal direction, any locking element (302, 306) of the second group is allowed to translate according to a direction perpendicular to the longitudinal direction, And wherein the longitudinal position of one or more cam elements (500) of the first linear cam assembly (401) and the longitudinal position of one or more cam elements (800) of the second linear cam assembly (402) are such that moving the internal body (400) in the longitudinal direction causes the locking elements of the first group (101) and the locking elements of the second group (102) to translate sequentially.

9. The connector (100) according to any one of the preceding claims, in: - the sleeve (108) comprises one or more openings (107) at a third longitudinal position and one or more openings (107) at a fourth longitudinal position, the third longitudinal position and the fourth longitudinal position both being located between the first longitudinal position and the front outer end (200); - the connector (100) comprises a third group (103) of one or more locking elements and a fourth group (104) of one or more locking elements, wherein the one or more locking elements (303, 307; 304, 308) are arranged in the one or more openings (107) of the sleeve (108) at the third longitudinal position and the fourth longitudinal position, respectively, and are movable between the following states o a retracted state in which the locking element (303, 307; 304, 308) is at least partially recessed in the sleeve (108), and o an extended state, in which the locking element (303, 307; 304, 308) protrudes from the sleeve (108), The connector (100) is adapted to clamp the module plate (1207) between the locking elements of the third group (103) and the locking elements of the fourth group (104) when the locking elements of the third group and the locking elements of the fourth group are in an extended state, thereby allowing the connector (100) to be releasably attached to the module (1201).

10. The connector (100) according to claim 9, in: - each opening (107) at said third longitudinal position and each opening (107) at said fourth longitudinal position is a circumferential slit (107); - each of the locking elements of the third group (103) and the locking elements of the fourth group (104) comprises a flat surface (1002, 1003) such that in the extended state of the locking elements of the third group (103) and the locking elements of the fourth group (104), the associated projecting flat surfaces jointly define a pair of retaining surfaces lying in a transverse plane and facing each other, And among them: - any one of the one or more circumferential slits at the third longitudinal position together with the corresponding circumferential slit at the fourth longitudinal position forms a single circumferential slit (107) extending between the third longitudinal position and the fourth longitudinal position, and - any locking element (303) of the third group is connected to a corresponding locking element (304) of the fourth group via an intermediate element (1004), wherein each of the one or more intermediate elements (1004) comprises a top surface facing away from the sleeve and parallel to the longitudinal direction, The connector (100) is adapted to clamp the module board (1207) between two retaining surfaces, thereby allowing the connector (100) to be releasably attached to the module (1201).

11. A system for releasably connecting frame modules (1201, 1202) in a modular system for temporary construction, the system comprising: - at least one connector (100) according to any one of the preceding claims; - at least two frame modules (1201, 1202), wherein the first frame module (1201) and the second frame module (1202) each comprise at least one column (1203, 1204), wherein o Any pillar (1203) has a flat back side (1215) and a flat front side (1209) extending in the height direction and the lateral direction; o any of the pillars (1203) includes one or more holes (1300) extending in the longitudinal direction between the back and front sides, and Wherein, the connector (100) is adapted to: - inserted through corresponding holes (1300) in the two frame modules (1201, 1202) with the locking elements (301, 305) in the retracted state, and - When the locking elements (301, 305) are in an extended state, the two columns (1203, 1204) are clamped together, wherein the front faces (1209, 1210) of the corresponding columns are in contact, and the head clamping surface and the rear clamping surface of the connector (100) are engaged with the back faces (1215, 1216) of the corresponding columns.

12. The system according to claim 11, in: - any column (1203) is hollow, the column (1203) comprises a front plate (1205) and a rear plate (1207) parallel to each other, and a cavity is formed between the front plate (1205) and the rear plate (1207), wherein the front plate (1205) and the rear plate (1207) both comprise an inner surface (1213, 1211) and an outer surface (1215, 1209), the inner surfaces (1213, 1211) of the front plate and the rear plate face the cavity, and the outer surfaces (1215, 1209) of the front plate and the rear plate face away from the cavity, wherein the outer surface (1215) of the rear plate corresponds to the back side of the column (1203), and the outer surface (1209) of the front plate corresponds to the front side of the column (1203), - the system comprises at least one connector (100) according to claims 5 to 8, and - When the frame modules (1201, 1202) are in the connected state, the rear plate (1207) and the front plate (1206) of each column (1203, 1204) are positioned between the head clamping surface (110) defined by the head part (109) of the connector and the central clamping surface (309) defined by the second group of locking elements (102).

13. The system according to claim 12 in, One or more blocking elements (1500, 1501) are attached to the inner surface of the front plate (1206) of any frame module and / or the inner surface of the rear plate of any frame module, each blocking element (1500, 1501) protruding from the inner surface and extending in the longitudinal direction, When the frame modules (1201, 1202) are in a connected state, rotating the connector (100) around the longitudinal direction will cause at least one locking element of the second group (102) of locking elements (302, 306) to engage with at least one blocking element of the blocking elements (1500, 1501), thereby blocking further rotation of the connector (100).

14. A system according to any one of claims 11 to 13, in: - the sleeve (108) of the connector (100) comprises a longitudinal groove (206) on its outer surface; - the system comprises at least one retaining clip (1800), the retaining clip (1800) being adapted to be arranged in any hole (1300), the retaining clip (1800) comprising a protrusion (1801), Wherein, the protrusion (1801) and the longitudinal groove (206) are adapted to form a tongue-and-groove connection between the retaining clip (1800) and the connector (100), thereby allowing the connector (100) to shift in the longitudinal direction along the length of the groove (206) while preventing the connector (100) from rotating around the longitudinal direction.

15. A system according to any one of claims 11 to 14, in: - any column (1203) is hollow, the column (1203) comprises a front plate (1205) and a rear plate (1207) parallel to each other, and a cavity is formed between the front plate (1205) and the rear plate (1207), wherein the front plate (1205) and the rear plate (1207) both comprise an inner surface (1213, 1211) and an outer surface (1215, 1209), the inner surfaces (1213, 1211) of the front plate and the rear plate face the cavity, and the outer surfaces (1215, 1209) of the front plate and the rear plate face away from the cavity, wherein the outer surface (1215) of the rear plate corresponds to the back side of the column (1203), and the outer surface (1209) of the front plate corresponds to the front side of the column (1203), - the system comprises at least one connector (100) according to claims 9 to 10; And among them: - when the locking elements of the third group (103) and the locking elements of the fourth group (104) are in an extended state, the rear plate (1207) of any frame module (1201) is adapted to be clamped between the locking elements of the third group (103) and the locking elements of the fourth group (104); -The third longitudinal position and the fourth longitudinal position are such that, when the sleeve (108) is inserted into any hole (1300) and the rear plate (1207) is clamped between the locking elements of the third group (103) and the locking elements of the fourth group (104), the rear outer end (201) of the sleeve (108) does not protrude beyond the outer surface (1209) of the front plate (1205).

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