Retaining spring

Abstract

Retaining spring (1) for fixing a mounting body (3) of a luminaire to a support rail (2) of the luminaire, wherein the support rail (2) has two side walls which are opposite each other in a transverse direction (Y) and which each have a fastening projection (21) extending in a transverse direction (Y) on their side facing the opposite side wall, the retaining spring (1) comprising a base section (13) for mounting on the mounting body (3) and on both transverse sides of the base section (13) a retaining leg (10) which extends vertically upwards from the base section (13) along a vertical direction (Z) and which is connected by a longitudinal axis which is perpendicular to the vertical direction (Z) and to the transverse direction (Y),a curved section is connected to the base section (13) and a retaining projection (11) extending along the transverse direction (Y) is arranged on it for vertically engaging behind the fastening projection (21) of an associated side wall of the support rail (2), characterized in that the retaining spring (1) has a blocking section (100) extending between the retaining legs (10) and vertically spaced from the base section (13), which prevents a rotation of each of the retaining legs (10) relative to the base section (13) about the longitudinal axis, wherein the retaining projection (11) is elastically deflectable relative to the retaining leg (10) along the transverse direction (Y).

Description

[0001] The invention relates to a retaining spring for fixing a mounting body of a luminaire to a support rail of the luminaire according to the preamble of claim 1, and to a system comprising retaining spring, support rail and mounting body.

[0002] Standard mounting springs are used to create luminaires that consist of a mounting body and a mounting rail. The mounting rail typically serves to fix the luminaire to a building element, such as a ceiling, and houses various components of the luminaire, such as electrical cables, control gear, radio modules, etc. Components of the luminaire, such as circuit boards with LEDs and control gear, are usually attached to the mounting body. When installing a luminaire, the mounting rail is typically attached to the building element first, and then the mounting body, which contains the aforementioned electrical components of the luminaire, is fixed to the mounting rail. This creates an internal space between the mounting rail and the mounting body, in which essential elements of the luminaire, such as circuit boards, control gear, etc., are located.Typically, the support rail and mounting body are each elongated in a longitudinal direction. The support rail usually has a cross-section perpendicular to the longitudinal direction, open at one vertical end along a vertical direction, and bounded along a transverse direction by two side walls connected by a base section of the support rail extending along the transverse direction. The support rail is usually attached to a building element via its base section. The mounting body is typically positioned at the open vertical end of the support rail, so that the mounting body and the support rail together form an interior space enclosed by the support rail and mounting body perpendicular to the longitudinal direction.At least in some longitudinal sections, the enclosure of the interior, formed by the support rail and mounting body, can be interrupted in sections, for example, to allow access to the interior, such as for air supply. The mounting body often has a cross-section perpendicular to the longitudinal direction, comprising a transversely extending base section and side walls extending vertically from the base section on both transverse sides. Preferably, the side walls of the mounting body each form a mounting projection, whereby the retaining spring can be pressed against the base section of the mounting body via these mounting projections and thus fixed to the mounting body. Preferably, in an operating position, the base section of the mounting body is arranged at the open end of the support rail.

[0003] Retaining springs of this type serve to enable the simplest and most robust possible fixation of the mounting body to the support rail and, furthermore, preferably to allow easy removal of the mounting body from the support rail. For maintenance purposes, it is necessary that the mounting body can be removed from the support rail so that a technician has access to the interior and can, for example, replace light sources, circuit boards, or the like. Retaining springs of this type are already known for this purpose, which have a base section for mounting on the mounting body and which have a retaining leg extending vertically away from the base section at both transverse ends. On this leg, a retaining projection extending outwards in the transverse direction, i.e., away from the transverse center of the retaining spring, is provided.In other words, each of the two transversely opposing retaining legs has a retaining projection, with the retaining projection of each retaining leg extending outwards and thus preferably away from the opposite retaining leg. Such a spring is usually manufactured from a single piece of sheet metal. This sheet metal part is then fixed to the mounting body with the base section. The support rail typically has a mounting projection on each of its side walls, extending transversely from the vertically extending side wall. In particular, the mounting projections are often designed such that the mounting projection of one side wall extends transversely towards the opposite side wall. When the mounting body is installed on the support rail, the mounting body is thus moved vertically towards the support rail.The retaining legs each have a transversely spring-loaded connection to the base section, allowing them to deflect transversely as they are inserted into the mounting rail past the mounting projection. After passing vertically over the mounting projections on the side walls of the mounting rail, the retaining legs' projections snap into place behind these projections, thus fixing the mounting body to the mounting rail. In principle, this allows for easy mounting of the mounting body to the mounting rail. However, it has proven problematic that such a fixation, as provided by conventional retaining springs, cannot withstand high vertical forces acting between the mounting rail and the mounting body.It must be taken into account that sometimes high forces act between the mounting body and the mounting rail. This is because, firstly, the mounting body supports essential lighting components of the luminaire and therefore has a considerable weight. Secondly, sudden movements of the component, such as those that can occur in building ceilings under sudden loads, can cause high acceleration along the vertical direction of the mounting body relative to the mounting rail. Due to the weight of the mounting body, this can result in a high vertical force acting on the mounting body, pulling it away from the mounting rail. However, due to the resilient design of the retaining springs of this type, they are specifically designed to allow their retaining springs to bend elastically in the transverse direction relative to the base section.Under sufficient force, the vertical force acting on the mounting body relative to the mounting rail causes the retaining projection, particularly due to its spring action, to deflect along the transverse direction. This reduces its transverse overlap with the mounting projection of the mounting rail. However, the transverse overlap between the mounting projection and the retaining projection is essential for reliably securing the mounting body to the mounting rail. A reduction in this overlap can easily lead to the retaining projection sliding transversely away from the mounting projection, causing the mounting body to detach from the mounting rail.

[0004] The present invention is based on the objective of providing a retaining spring that at least partially solves at least one of the problems of generic retaining springs described above.

[0005] As a solution to the aforementioned problem according to the invention, the invention proposes a retaining spring with the features of claim 1. The retaining spring according to the invention is designed to ensure that a mounting body of a luminaire is fixed to a support rail of the luminaire. Preferably, such a support rail has two side walls that are opposite each other in a transverse direction and that each has a mounting projection extending in a transverse direction on its side facing the opposite side wall. Preferably, the mounting projection of one side wall extends towards the side wall opposite that side wall in the transverse direction.According to the invention, the retaining spring comprises a base section for mounting on the mounting body and, on each of the transverse sides of the base section, a retaining leg which extends vertically upwards from the base section along a vertical direction and which is connected to the base section via a curved section that curves about a longitudinal axis perpendicular to the vertical direction and the transverse direction and thus runs along a longitudinal direction. On each of the retaining legs, a retaining projection extending along the transverse direction is arranged for vertically engaging behind the fastening projection of an associated side wall of the support rail when the retaining spring is in an operating position in which its base section is fixed to the mounting body and the mounting body is fastened to the support rail.In this operating position, the retaining leg extends vertically upwards from the base section along the vertical direction and also vertically upwards from the section of the mounting body to which the base section of the retaining spring is attached. The retaining projection arranged on the respective retaining leg preferably engages vertically behind the mounting projection of the support rail at an upper surface of the mounting projection, thereby holding the mounting body with the base section of the retaining spring attached to it vertically against the support rail, in particular pressing it against the rail.According to the invention, the retaining spring has a blocking section extending along the transverse direction between the retaining legs and vertically spaced from the base section. This blocking section prevents each of the retaining legs from rotating relative to the base section about its longitudinal axis, and the retaining projection is elastically deflectable relative to the retaining leg along the transverse direction. The blocking section is particularly preferably formed by the base section and / or at least one of the retaining legs. It is particularly preferred that the blocking section is integrally integrated with at least one of the two retaining legs and / or with the base section.In any case, the blocking section is arranged transversely between the retaining legs so that, when these retaining legs are deflected relative to the base section about their longitudinal axis, they can come into contact with the blocking section, thus preventing each retaining leg from rotating relative to the base section about its longitudinal axis. In one embodiment, the blocking section is designed to correspond to the retaining legs in such a way that it prevents any rotation of the retaining legs about their longitudinal axis. In another embodiment, the blocking section is designed to prevent rotation of each retaining leg relative to the base section about its longitudinal axis in such a way that the rotation is limited to an angle of less than 15°, in particular less than 10°. This angle is preferably taken from the rest position, in which the retaining spring experiences no force.Preferably, the blocking section is designed to prevent rotation of each of the retaining legs relative to the base section about the longitudinal axis only in a specific direction of rotation about the longitudinal axis, in particular about the direction of rotation about the longitudinal axis in which, during a hypothetical rotation of the retaining leg relative to the blocking section, the transverse end of the retaining projection arranged on the retaining leg is moved towards the transverse center of the retaining spring, wherein this direction of rotation is particularly preferably a direction of rotation in which the vertically upper end of the retaining leg is moved towards the retaining leg opposite it in the transverse direction. The blocking section thus prevents the retaining legs from being rotated relative to the base section from their rest position in such a way that the transverse ends of their retaining projections are moved towards each other.Accordingly, the blocking section can prevent the retaining leg, and thus the retaining projection, from being deflected towards the transverse center of the retaining spring when a vertical load is applied to the retaining projection, as is the case in the application of the retaining spring according to the invention. This occurs when the retaining projections overlap with fastening projections of the support rail perpendicular to the vertical direction, resulting in a reduction of its perpendicular overlap with the fastening projection, such that the mounting body is no longer held on the support rail. The retaining spring according to the invention is therefore suitable for ensuring reliable fixation of the mounting body to the support rail even under very high vertical loads.

[0006] The retaining spring, with its blocking section and retaining legs, is particularly preferably designed such that the rotation of each retaining leg relative to the base section about the longitudinal axis is prevented as described above when a force of up to 50 N is exerted along the transverse direction on the respective transverse end of the retaining projection arranged on the respective retaining leg towards the transverse center, and / or when a force of up to 1000 N is exerted along the vertical direction on the respective retaining projection arranged on the respective retaining leg. Generally, the retaining projection preferably projects in the transverse direction beyond the retaining legs in such a way that it is further from the transverse center than the retaining leg.A particularly advantageous feature of the retaining spring according to the invention is provided by a retaining projection which is elastically deflectable relative to the retaining leg along the transverse direction, in particular from the rest position towards the transverse center of the retaining spring. The inventors have recognized that this ensures, firstly, the ease of inserting and removing the retaining spring from a support rail, and secondly, prevents unintentional deflection of the retaining projection from the operating position towards the transverse center of the retaining spring or from the rest position when a vertical force acts upon the retaining projection.

[0007] In one embodiment, the retaining spring is made from a sheet of metal, in particular by forming it, and especially as a single piece. This allows the retaining spring to be manufactured particularly cost-effectively and simply. In another embodiment, at least part of the blocking section is formed by a section integrally integrated into one of the retaining legs. Preferably, both retaining legs each form part of the blocking section. Particularly preferably, the blocking section is formed by a section integrally integrated into a first retaining leg and by a section integrally integrated into a second retaining leg. By having the blocking section formed at least partially, and in particular completely, by the retaining legs, the retaining spring can be designed to be particularly robust and manufactured particularly cost-effectively.In one embodiment, at least one of the retaining legs has a first section extending vertically away from the base section, and a second section adjoining the first section, extending towards the opposite retaining leg. Particularly preferably, each retaining leg has a first section extending vertically away from the base section, and a second section adjoining the first section, extending towards the opposite retaining leg. Particularly preferred is the second section of the at least one retaining leg being spaced less than 3 mm apart along the transverse direction from the opposite retaining leg to provide a stop for relative movement of the retaining legs along the transverse direction, forming the blocking section.Particularly preferably, both retaining legs each have a second section, with their second sections spaced apart from each other by less than 3 mm along the transverse direction to ensure a stop for relative movement of the retaining legs along the transverse direction, forming the blocking section. Particularly preferably, the retaining legs, in their rest position, lie against each other with their mutually facing transverse ends or are spaced apart from each other by less than 2 mm, and in particular by less than 1 mm. The smaller the spacing, the smaller the angle of rotation of each retaining leg relative to the base section about the longitudinal axis can be, which the blocking section still allows during rotation; i.e., the angle to which the blocking section limits the rotation of each retaining leg to prevent rotation of the retaining legs.Particularly preferred is the retaining projection provided on at least one retaining leg arranged vertically closer to the bottom section than the vertical area of ​​the second section of the retaining projection, in which the retaining leg is closest to the one opposite in the transverse direction. Particularly preferred are the retaining projections provided on the respective retaining legs each arranged closer to the bottom section than a vertical area of ​​the second section of the retaining leg, in which the respective retaining leg is closest to the one opposite in the transverse direction.The relative arrangement of the retaining projection and the aforementioned vertical area of ​​the second section, in which the two retaining legs are closest to each other in the transverse direction, can be particularly advantageous for blocking a rotation of the retaining legs while simultaneously enabling a retaining projection projecting in the transverse direction, which, starting from the rest position, can be elastically deflected so that its transverse end, which is furthest away from the transverse center, is moved towards the transverse center.

[0008] In one embodiment, the retaining projection has a projection section and a connecting section, wherein the projection section extends beyond the retaining leg along the transverse direction and is elastically connected to the retaining leg via the connecting section. The provision of the projection section and the connecting section enables the particularly efficient realization of a retaining projection that extends sufficiently far beyond the retaining leg in the transverse direction and is simultaneously elastically hinged to the retaining leg so that it can be elastically deflected along the transverse direction with its transverse end pointing away from the transverse center towards the transverse center.The connecting section preferably transitions into the retaining leg via a rotational axis extending along the longitudinal direction, about which it can be elastically deflected relative to the retaining leg by means of a rotation. The rotation, of course, refers to a direction of rotation with which the retaining projection, with its transverse end pointing away from the transverse center, can be deflected towards the transverse center. The connecting section is particularly preferably arranged vertically above the projection.This can be particularly advantageous in ensuring that, under a vertical load exerted on a retaining section of the retaining projection, the retaining projection is not deflected towards the transverse center, since, firstly, the retaining leg on which it is arranged is prevented from rotating towards the other retaining leg, and secondly, the arrangement of the connecting section above the projection section prevents such deflection as far as possible. This is particularly advantageous for the typical application of a retaining spring according to the invention, in which the retaining spring is attached to the mounting body with its base section and fixes the mounting body to a support rail that has mounting projections, wherein the mounting projections press vertically against the retaining projection across the retaining section of the retaining projection.

[0009] Particularly preferably, the retaining projection has a transverse retaining section, wherein the retaining projection and retaining leg are configured such that the application of an external force acting vertically on the retaining section of the retaining projection causes the retaining projection to deflect along the transverse direction away from the transverse center of the retaining spring relative to the retaining leg. Particularly preferably, the retaining projection and retaining leg are configured such that the application of this external force acting vertically on the retaining section of the retaining projection causes the projection section to rotate relative to the retaining leg about the axis of rotation away from the transverse center and thus outwards. For this purpose, it can be particularly advantageous for the retaining projection to have a connecting section and a projection section, wherein the connecting section is arranged vertically above the projection section.The preferred approach is to apply a force in the vertical direction acting on the retaining section of the retaining projection, acting vertically upwards and thus away from the base section of the retaining spring onto the retaining section, with the force acting relatively between the retaining section and the base section of the retaining spring. In the described particularly advantageous embodiment, it can be ensured that, under a force acting on the retaining projection in the typical application of the retaining spring according to the invention, the overlap extending perpendicular to the vertical direction between the retaining projection and the mounting projection of the support rail increases rather than decreases, thereby ensuring particularly good fixation of the mounting body to the support rail, even under sudden, extreme forces between the mounting body and the support rail.

[0010] In one embodiment, an actuating section extending transversely beyond the retaining projection is arranged on at least one of the retaining projections. By means of this actuating section, when an external force is applied to the transverse end of the actuating section pointing away from the transverse center of the retaining spring, the retaining projection can be deflected relative to the retaining leg towards the transverse center of the retaining spring. This can be particularly advantageous for the disassembly of a mounting body that is attached to a support rail by means of the described embodiment of the retaining spring according to the invention.Because the actuating section is arranged on the retaining projection, and in particular engages directly with the retaining projection, the retaining projection can be deflected relative to the retaining leg via the actuating section, bringing its transverse end pointing away from the transverse center towards the transverse center. This reduces the overlap perpendicular to the vertical direction between the mounting projection of the support rail and the retaining projection of the retaining spring in the typical application described, to such an extent that the mounting body, on which the retaining spring is arranged with its base section, can be detached from the support rail.

[0011] In one embodiment, the bottom section is formed integrally with at least one of the retaining legs. Particularly preferred are the bottom section, at least one of the retaining legs, and the retaining projection arranged on this retaining leg formed integrally. Particularly preferred are the retaining legs, the bottom section, the retaining projections arranged on the retaining legs, and the blocking section formed integrally. Particularly preferred is the retaining spring formed integrally as a whole. The integral construction can contribute to a reduction in manufacturing costs as well as ensure particularly high stability of the retaining spring. Particularly preferred are the corresponding integral parts manufactured from a sheet of metal, especially by forming from a sheet of metal.

[0012] The invention further relates to a system comprising a mounting body, a support rail, and a retaining spring according to the invention. In an operating position of the system, the retaining spring is attached to the mounting body with its base section, in particular to a base section of the mounting body, and holds the mounting body vertically spaced from a base section of the support rail connecting the side walls, in particular by pressing the mounting body vertically against the side walls of the support rail. Each of the retaining projections of the retaining spring rests vertically from above against a corresponding mounting projection of the support rail, each of the mounting projections being provided on one of the side walls of the support rail.Particularly preferably, each of the retaining projections overlaps with its respective mounting projection on the support rail over an overlap area that extends perpendicular to the vertical direction. Particularly preferably, the retaining spring is designed, as described above in various geometric configurations, such that, under a vertical force load between the mounting body and the support rail, starting from the described operating position and amounting to up to 500 N, particularly up to 1000 N, rotation of the retaining legs about the described longitudinal axis relative to the base section is prevented. This prevents the upper ends of the retaining legs from moving towards each other in the transverse direction, thus preventing the overlap area perpendicular to the vertical direction from being reduced by this vertical force acting between the support rail and the mounting body.Particularly preferably, each of the retaining projections has a retaining section vertically abutting the corresponding mounting projection at its upper edge, and the retaining spring is designed and positioned in the operating position relative to the mounting body and the support rail such that, when an external force acts on the mounting body in the vertical direction and points away from the base of the support rail in the operating position, the mounting projection exerts a force on the retaining area that causes the retaining projection to deflect outwards relative to the transverse center of the retaining spring, and in particular relative to the retaining leg, along the transverse direction away from the transverse center of the retaining spring. This ensures with particular reliability that the described overlap area between the mounting projection and the retaining projection is not reduced, but rather increased, when such an external vertical force is applied.

[0013] The invention will now be explained in more detail using an exemplary embodiment with reference to two figures.

[0014] They show: Fig. 1: a schematic representation of a principle, showing a view of an embodiment of a system according to the invention; Fig. 2: in a schematic diagram a view of the retaining spring of the system according to the invention Fig. 1.

[0015] In the Fig. 1 and Fig. 2 is an embodiment of a retaining spring according to the invention. 1 presented in schematic diagrams. While in Fig. 2 a perspective view of the described embodiment of a retaining spring according to the invention 1 As shown, it is in Fig. 1 a system according to the invention with the retaining spring according to the invention 1 according to Fig. Figure 2 shows the device in its operating position, in which its elements assume a predetermined position relative to each other. The following sections describe the... Fig. 1 and Fig. 2 explained jointly. The described embodiment of a retaining spring according to the invention. 1 has a floor section 13 on, on each of whose two transverse sides there is a retaining leg 10 is arranged, which extends from the floor section 13 extending vertically upwards along the vertical direction Z. Each of the retaining legs 10 is each via a curvature section that curves around a longitudinal axis that runs parallel to the longitudinal direction X, which is perpendicular to the transverse direction Y and the vertical direction Z, with the ground section 13 connected. At each of the support arms 10 is a holding advantage 11 arranged in the transverse direction Y with reference to the retaining leg 10, where it is intended to protrude. Each of the retaining projections 1 Thus, in the planar section that extends perpendicular to the transverse direction Y and in which its transverse center of the retaining spring is located 1 the most distant transverse end is located, the absolute transverse end of the retaining spring 1 from which, according to the invention, is generally advantageous. The holding projection 11 is attached to the support leg assigned to it 10 arranged so that it is relative to the retaining leg 10 is elastically deflectable along the transverse direction Y. In the described embodiment, this is ensured by the fact that the retaining projection 11 comprising a projection section and a connecting section, wherein it is elastically deflectable via the connecting section and wherein the connecting section is arranged vertically above the projection section.

[0016] To prevent the retaining legs from twisting 10 around their respective longitudinal axis in a direction of rotation that causes the retaining legs to rotate 10 The retaining spring indicates that the spring moves towards each other along the transverse direction Y. 1 a blockage section 100 on, which in this case is through the retaining legs 10 is formed. The retaining arms 10 Each of these sections has a first section. 101 up, with which they each move vertically from the section of ground 13 extend away, as well as a second section 102 , which refers to the first section 101 connects and which leads to the opposite retaining leg 10 which proceeds. As can be seen in particular from the fact that... Fig. The retaining legs can be seen as shown in section 1. 10 with their second sections 102at two ends opposite each other along the transverse direction Y by an extremely small distance from each other, by means of one of the retaining legs 10 with its second section 102 with reference to the transverse direction Y, a stop for the second section 102 the other of the retaining leg 10 forms. When attempting to twist the retaining legs 10 This stop prevents the retaining legs from moving around the aforementioned longitudinal axes. 10 can move towards each other, causing a twisting of the retaining legs 10 is prevented overall.

[0017] In the described embodiment, each of the retaining projections also has... 11 each one extending in the transverse direction Y over the holding projection 11 An actuating section extending beyond the main section is provided, which is operated by an actuating element. 4 is trained. The actuating element 4Thus, in the transverse direction Y, it stands above the holding projection assigned to it. 11 forward, i.e., projects outwards along the transverse direction beyond the holding projection 11 out, so that the actuating element 4 is easily accessible and an external force acting along the transverse direction Y can be applied to its transverse end from the outside, with which the holding projection 11 along the transverse direction Y to the transverse center of the retaining spring 1 can be deflected. These actuating elements 4 in combination with the deflection of the retaining projections 11 ensure particularly easy assembly and disassembly of the retaining spring 1 on a mounting rail 2 , as they are in Fig. 1 is shown. The actuating elements 4 Each of these sections has a fixing section. 41 at the holding projections 11latched, thus preventing a relative movement of the actuating elements 4 along the transverse direction Y to the holding projection 11 which is prevented, which is generally advantageous according to the invention.

[0018] Out of Fig. 1 describes the function of the retaining spring according to the invention. 1 particularly easy to see. The retaining spring 1 is with its floor section 13 on a bottom section of a mounting body 3 fastened and interlocking with its retaining projections 11 fastening projections 21 , which are mounted on the support rail 2 are formed. The holding projections are located there. 11 each with a holding section on one upper side of the mounting projections 21 on. This will make the mounting body 3 along the vertical direction Z against the support rail 2 pressed and held against her. Via actuation of the operating elements 4Along the transverse direction Y towards the transverse center, the area of ​​this holding section can be reduced, i.e., the overlap of the fastening projections. 21 with the retaining projections 11 are reduced perpendicular to the vertical direction Z, so that the mounting body 3 from the support rail 2 can be removed along the vertical direction Z. From the properties of the retaining spring according to the invention described above 1 It turns out that in the Fig. The operating position shown in point 1 also applies when a high vertical force occurs between the support rail. 2 and mounting body 3 the retaining spring 1 the mounting body 3 reliably attached to the mounting rail 2 fixed, since the overlap area perpendicular to the vertical direction Z does not decrease or only decreases insignificantly when such a vertical force occurs. Reference symbol list 1 retaining spring 2 support rails 3 Mounting bodies 4 Actuating element 10 retaining legs 11 Holding advantage 13 Ground section 21 Mounting projection 41 Fixing section 100 Blockage section 102 second section X Longitudinal direction Y transverse direction Z Vertical direction

Claims

[1] Retaining spring (1) for fixing a mounting body (3) of a luminaire to a support rail (2) of the luminaire, wherein the support rail (2) has two side walls which are opposite each other in a transverse direction (Y) and which each have a mounting projection (21) extending in a transverse direction (Y) on their side facing the opposite side wall, the retaining spring (1) comprising a bottom section (13) for mounting on the mounting body (3) and on both transverse sides of the bottom section (13) a retaining leg (10) which extends vertically upwards from the bottom section (13) along a vertical direction (Z) and which is connected by a longitudinal axis which is perpendicular to the vertical direction (Z) and to the transverse direction (Y),is connected to the curved section of the base (13) and on which a retaining projection (11) extending along the transverse direction (Y) is arranged for vertically engaging behind the fastening projection (21) of an associated side wall of the support rail (2), , characterized by , that the retaining spring (1) has a blocking section (100) extending between the retaining legs (10) and vertically spaced from the base section (13), which prevents each of the retaining legs (10) from rotating relative to the base section (13) about the longitudinal axis, wherein the retaining projection (11) is elastically deflectable relative to the retaining leg (10) along the transverse direction (Y). [2] Retaining spring (1) according to claim 1, characterized by , that the retaining spring (1) is made of sheet metal. [3] Retaining spring (1) according to one of the preceding claims, characterized by, that at least part of the blocking section (100) is formed by a section (102) integrally integrated into one of the retaining legs (10), wherein in particular the two retaining legs (10) each form a part of the blocking section (100). [4] Retaining spring (1) according to claim 3, characterized by, that at least one of the retaining legs (10), in particular each of the retaining legs (10), has a first section (101) with which it extends vertically away from the base section (13), wherein the at least one of the retaining legs (10), in particular each retaining leg (10), has a second section (102) adjoining the first section (101) with which it extends towards the opposite retaining leg (10), wherein in particular the retaining legs (10) with their second sections (102) are spaced apart from each other by less than 3 mm along the transverse direction (Y) to ensure a stop for a relative movement of the retaining legs (10) along the transverse direction (Y), wherein in particular the retaining projection (11) provided on the at least one retaining leg (10), in particular each of the retaining projections (11) provided on the respective retaining leg (10),is arranged vertically closer to the base section (13) than the vertical area of ​​the second section (102) of the respective support leg (10), in which it is closest to the support leg (10) opposite in the transverse direction (Y). [5] Retaining spring (1) according to one of the preceding claims, characterized by , that the retaining projection (11) has a projection section and a connecting section, wherein the projection section extends along the transverse direction over the retaining leg (10) and is elastically deflectable to the retaining leg (10) via the connecting section, wherein in particular the connecting section transitions into the retaining leg (10) via an axis of rotation extending along the longitudinal direction (X), about which it can be elastically deflected relative to the retaining leg (10) by means of rotation. [6] Retaining spring (1) according to claim 5, characterized bythat the connecting section is arranged vertically above the projection section. [7] Retaining spring (1) according to one of the preceding claims, characterized by , that the retaining projection (11) has a transverse retaining section, wherein the retaining projection (11) and the retaining leg (10) are designed in such a way that the provision of an external force acting in the vertical direction (Z) on the retaining section of the retaining projection (11) causes a deflection of the retaining projection (11) along the transverse direction (Y) away from the transverse center of the retaining spring (1) relative to the retaining leg (10), in particular causing a rotation of the projection section relative to the retaining leg (10) about the axis of rotation away from the transverse center. [8] Retaining spring (1) according to one of the preceding claims, characterized by, that at least one of the retaining projections (11) has an actuating section extending in the transverse direction (Y) beyond the retaining projection (11), by means of which the retaining projection (11) can be deflected relative to the retaining leg (10) towards the transverse center when an external force is applied to the transverse end of the actuating section pointing away from the transverse center of the retaining spring (1) in the transverse direction towards the transverse center of the retaining spring (1). [9] Retaining spring (1) according to one of the preceding claims, characterized by, that the bottom section (13) is formed in one piece with at least one of the retaining legs (10), in particular the bottom section (13), at least one of the retaining legs (10) and the retaining projection (11) arranged on this retaining leg (10) are formed in one piece, in particular the retaining legs (10), the bottom section (13), the retaining projections (11) and the blocking section (100) are formed in one piece, in particular the retaining spring (1) is formed in one piece. [10] System comprising a mounting body (3), a support rail (2) and a retaining spring (1) according to one of the preceding claims, wherein in an operating position of the system the retaining spring (1) is attached to the mounting body (3) with its bottom section (13) and holds the mounting body (3) vertically spaced from a bottom section (13) of the support rail (2) connecting the side walls, by each of the retaining projections (11) of the retaining spring (1) bearing vertically from above against a corresponding mounting projection (21) of the support rail (2). [11] System according to claim 10, characterized by, that each of the retaining projections (11) bears vertically upwards against its associated mounting projection (21) with a retaining section, and that the retaining spring (1) is designed and arranged in the operating position relative to the mounting body (3) and the support rail (2) such that, when an external force acting on the mounting body (3) in the operating position in the vertical direction (Z) and pointing away from the bottom of the support rail (2), the mounting projection (21) exerts such a force on the retaining area that it causes the retaining projection (11) to deflect relative to the retaining leg (10) along the transverse direction (Y) away from the transverse center of the retaining spring (1).

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