AU2008221568B2 - Improved din rail mounting bracket - Google Patents

Abstract

A DIN rail mounting bracket for mounting a DIN rail within an electrical enclosure, the bracket including: 5 a rotatable mount having a DIN rail mounting portion, the rotatable mount being capable of movement such that, in use, a DIN rail mounted on the rotatable mount can be moved between a normal position and at least one angled position; and a stop member capable of releasably engaging the rotatable mount 10 such that the rotatable mount can be locked in either the normal position or the at least one angled position. cJ00 C(9 Clf.J

Description

P/00/01 1 Regulation 3.2 AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Invention Title: IMPROVED DIN RAIL MOUNTING BRACKET Applicant: B&R ENCLOSURES PTY LTD The following statement is a full description of this invention, including the best method of performing it known to me: 1 IMPROVED DIN RAIL MOUNTING BRACKET This application claims priority from Australian provisional patent application No. 2007905152 filed on 20 September 2007, the contents of which are to be 5 taken as incorporated herein by this reference. Field of the Invention The present invention relates to a bracket for mounting a DIN rail within an 10 electrical enclosure, such an electrical enclosure being for any purpose and for example including enclosures that might be referred to as metering enclosures, meter boxes, power boxes, fuse boxes or switching cabinets. The present invention also relates to an electrical enclosure adapted for use with the DIN rail mounting bracket. 15 Background of the Invention Electrical enclosures are used to house a wide variety of different types of electrical equipment (such as circuit breakers, switches and relays), in 20 industrial, commercial and domestic settings. Much of the electrical equipment housed in such enclosures is mounted to horizontal rails rigidly secured to the upright walls, normally towards the rear thereof, within the interior of the enclosure. Circuit breakers are an example of equipment commonly mounted in this manner inside an electrical enclosure. 25 These horizontal rails are most often referred to as DIN rails, although in some countries they are referred to as "top hat" rails due to their usual cross section being generally similar to that of the cross-section of such a hat. DIN rails are standardized rails, most often being 35mm wide metal rails, provided 30 in long lengths that are able to be cut to size to fit across and within an electrical enclosure. Traditionally, DIN rails have been rigidly secured to the interior side walls of electrical enclosures by normal fasteners such as screws and rivets, prior to any electrical equipment being mounted thereon.

Much of the equipment mounted on these DIN rails is equipment that is not electrically connected when mounted, but is subsequently accessed by an electrician for electrical connection as required. At this time, an electrician is generally required to be able to access both the top and bottom of the 5 electrical equipment mounted on the DIN rail, which usually proves to be very difficult due to the close proximity of other equipment or simply due to the height of the DIN rail relative to the working height of the electrician. Sometimes, this gives rise to safety problems as the electrician may not have a good line of sight and may have dexterity problems with installation and 10 connection. The present applicant has determined that these difficulties could be at least partially overcome by providing a DIN rail that was movable whilst still secured within the interior of an electrical enclosure. It is thus an aim of the present 15 invention to provide a bracket for the mounting of a DIN rail in an electrical enclosure that allows the DIN rail to rotate so as to provide improved access to electrical equipment mounted thereon. A further aim is to provide an electrical enclosure that assists with the functionality of the DIN rail mounting bracket. 20 Before turning to a summary of the present invention, it must be appreciated that the above description of the prior art has been provided merely as background to explain the context of the invention. It is not to be taken as an admission that any of the material referred to was published or known, or was 25 a part of the common general knowledge in Australia or elsewhere. Also before turning to a description of the present invention, it is useful to provide an explanation of some of the terms that will be (and have been) used to define the spatial relationship of various parts thereof. In this respect, 30 spatial references throughout this specification will generally be based upon an assembled electrical enclosure installed so as to be generally upright, for example secured to a generally vertical exterior wall of a dwelling or commercial establishment. With this environment as the basis, some parts may then be defined with reference to the exterior wall, and also to the "horizontal" and the "vertical" (or "up" and "down"), allowing further references to "upper" or "upwards" and "lower" or "downwards". Further, it will be understood that an electrical enclosure always has an interior, and thus some parts may be defined with directional reference to "inner" or "inwardly" and 5 "outer" or "outwardly" with respect to the interior of the electrical enclosure. Summary of the Invention The present invention provides a DIN rail mounting bracket for mounting a 10 DIN rail within an electrical enclosure, the bracket including: a rotatable mount having a DIN rail mounting portion, the rotatable mount being capable of movement such that, in use, a DIN rail mounted on the rotatable mount can be moved between a normal position and at least one angled position; and 15 a stop member capable of releasably engaging the rotatable mount such that the rotatable mount can be locked in either the normal position or the at least one angled position. In a preferred form, the bracket will also include a housing for both the 20 rotatable mount and the stop member, the rotatable mount and the stop member being configured within or as a part of the housing in such a manner that allows the releasable engagement and movement referred to above. The present invention also provides a kit including one or more DIN rail 25 mounting brackets as described above, together with one or more lengths of DIN rail. The present invention further provides an electrical enclosure adapted for use with the above described DIN rail mounting bracket, the electrical enclosure 30 including two or more rear rails between which a DIN rail may be mounted, each of the rear rails including a front face to which the bracket may be secured.

In a further preferred form, the housing mentioned above includes a means for securing the housing within the interior of the electrical enclosure. Preferably, the securing means is able to secure the DIN rail mounting bracket to the rear wall of the electrical enclosure, rather than the side walls of the electrical 5 enclosure, via the two or more rear rails mentioned above. In this form, the electrical enclosure preferably includes at least two of the rear rails, normally arranged to be upright at the rear corners of the electrical enclosure. Of course it will be appreciated that it is not essential for the DIN rail mounting bracket of the present invention to be secured within an electrical enclosure 10 only with the rear rails mentioned above - the DIN rail mounting bracket may indeed be secured within an electrical enclosure by other means. Ideally, the rotatable mount of the DIN rail mounting bracket is in the form of a circular body having the rail mounting portion located generally centrally 15 thereof. The circular body is then able to be rotatably received within a correspondingly sized and shaped recess in the housing. Having said that, it must be appreciated that the rotatable mount need not be entirely circular, but may only have enough circularity to permit the rotary movement and the releasable engagement described herein. 20 In a preferred form, the circular body is provided with at least two rebates in its periphery, a first rebate defining the normal position and a second rebate defining one angled position, each rebate being configured to be releasably engaged by the stop member to lock the circular body (and thus the rotatable 25 mount) with the DIN rail in those normal and angled positions. In this respect, and as mentioned above, the stop member is also preferably either a part of, or operatively received by, the housing in a manner that permits the releasable engagement of the rotatable mount therewith. 30 In relation to the stop member itself, preferably the stop member includes an engaging tab and a manually operable latch, the latch possibly alternatively being referred to as a lever or an arm. In one form, the engaging tab is resiliently biased into a rotatable-mount engaging position, in which position the engaging tab is able to engage with the rotatable mount to lock the rotatable mount with the DIN rail in either the normal position or the at least one angled position. The engaging tab is preferably "at rest" in its engaging position and, in one form, engages with the rebates in the periphery of the circular body of the rotatable mount. 5 The manually operable latch is preferably able to be operated to urge the engaging tab away from its engaging position, against the bias of the engaging tab, to disengage the engaging tab from the rotatable mount (and, in particular, from the rebate in the circular body) and thus allow rotation of the 10 rotatable mount to allow movement of the DIN rail from the normal position to an angled position and vice-versa. When moved to such a new position, the resilient bias of the engaging tab will act to again engage the engaging tab with a rebate in the circular body, that rebate defining the new position. Operation of the manually operable latch in this manner therefore allows the 15 rotatable mount to be unlocked and rotated to move the DIN rail from, for example, the normal position to an angled position, where the rotatable mount can again be locked in position. In a preferred form, the engaging tab is provided by an elongate tongue 20 formed integrally with the housing. The engaging tab preferably extends from a base within the housing to a free end, and includes a locking abutment therebetween that extends abruptly upwardly on one side from the base but smoothly and continuously on the other side from the free end. The locking abutment thus extends into the recess within which the circular body of the 25 mount is located, so as to be able to engage with one of the rebates mentioned above. The integral and elongate nature of the engaging tab in this form provides the resilience required to operate in the above manner, in terms of its bias 30 towards an engaging position. Preferably, the manually operable latch at least partially overlies the engaging tab, and is able to be pivoted across the engaging tab from a rail locked position, where the engaging tab engages the rotatable mount with the DIN rail in either its normal or angled positions, to a rail free position where the engaging tab has been urged away from the rotatable mount to disengage the locking abutment therewith and allow movement of the rotatable mount between and to and from the DIN rail's normal and angled positions. In this 5 form, the pivoting of the latch is preferably provided by manual depression or retraction of the latch, and the subsequent pivotal movement of the latch about a point at which it is secured to the housing. In a further preferred form, the DIN rail mounting portion of the rotatable 10 mount is configured so as to slidably receive an end of a DIN rail therewithin, from external of the periphery of the circular body. In this form, the housing preferably then includes a DIN rail pathway, the DIN rail pathway being located in the housing so as to be accessible from external of the housing, and so as to align with the DIN rail mounting portion of the rotatable mount, to 15 permit insertion of a mounted DIN rail, when the rotatable mount is in one of the angled positions. Indeed, when the rotatable mount is locked in this one angled position, the mounted end of a DIN rail is also able to be removed from the rotatable mount by being slid out of the DIN rail mounting portion along the aligned DIN rail pathway of the housing. 20 In relation to the fit of the DIN rail, or rather an end of the DIN rail, in both the DIN rail mounting portion and the DIN rail pathway in the housing, it will be appreciated that the pathway will ideally be sized so as to allow the end of the DIN rail to easily slide therealong without requiring undue force but without 25 allowing too much play. It will also be appreciated that, due to the DIN rail mounting portion being where the end of the DIN rail is rigidly secured, it should be sized and configured so as to provide for a reasonably tight friction fit. 30 Before turning to a more detailed description of the general aspects of the bracket of the present invention, a brief explanation of the preferred operation of the bracket will be provided. With this in mind, it will be appreciated that normally a DIN rail will be mounted to an electrical enclosure with a bracket according to the present invention at either end thereof, and thus there would be brackets secured to opposed upright rear rails (as mentioned above) of an electrical enclosure before installation of the DIN rail. However, it should be appreciated that it is not essential to use such brackets at both ends of the DIN rail; rather, it is envisaged that such a bracket could be provided at just 5 one end, with a suitable rotating mounting member secured to the rear rail at the other end. Typically, the brackets will be secured to those opposed upright rear rails such that the normal position will result in the DIN rail being in its normal "upright" 10 orientation. The DIN rail will thus typically be mounted such that its longitudinal dimension extends substantially horizontally and its lateral dimension (the equipment mounting dimension) extends substantially vertically (or upright). In this form, the rotation of the rotatable mount from its normal position to an angled position (following the disengagement of the stop 15 member to release the DIN rail from its normal position) will ideally be a rotation of the top of the DIN rail from about vertical to about 45 degrees away from vertical (preferably away from the rear of the electrical enclosure and towards the front of the electrical enclosure where an electrician, for example, may be standing). Thus, this rotation of the DIN rail brings towards the front, 20 and better exposes to the front, the top surfaces of any equipment mounted on the DIN rail when viewed from a height above the height of the DIN rail. Similarly, in a form of the present invention where the bracket includes two angled positions (by way of there being three rebates on the circular body of 25 the rotatable mount), there being one angled position on each side of the normal position, the rotation of the rotatable mount from its normal position to the second angled position (again following the disengagement of the stop member to release the DIN rail from its normal position) will ideally be a rotation of the bottom of the DIN rail from about vertical to about 45 degrees 30 away from vertical (again preferably away from the rear of the electrical enclosure and towards the front of the electrical enclosure where an electrician, for example, may be standing). Thus, this rotation of the DIN rail brings towards the front, and better exposes to the front, the bottom surfaces of any equipment mounted on the DIN rail when viewed from a height below the height of the DIN rail. Thus, the bracket of the present invention provides an electrician, for 5 example, with easier access to the top and bottom surfaces of any equipment mounted on a DIN rail, by the mere disengagement of a stop member and rotation of the DIN rail from its normal position to an angled position, where the DIN rail can again be locked in position by re-engagement of the stop member. 10 Furthermore, in the preferred form, which includes a DIN rail pathway in the housing that aligns with the rail mounting portion of the rotatable mount, in at least one of the angled positions the DIN rail may be easily removed from the bracket simply by sliding the DIN rail, for example, up and towards the front of 15 the electrical enclosure and out of the bracket. This allows for easy insertion and removal of the DIN rail, either for initial installation or for more substantive work to be conducted thereupon by the electrician. Brief Description of the Drawings 20 Having briefly described the general concepts involved with the present invention, a preferred embodiment of a bracket in accordance with the present invention, for mounting a DIN rail within an electrical enclosure, will now be described. However, it is to be understood that the following description is not 25 to limit the generality of the above description. In the drawings: Figure 1 is a perspective view of an electrical enclosure with a DIN rail 30 mounting bracket in accordance with a preferred embodiment of the present invention secured therewithin and having a DIN rail mounted thereto; - IVJ Figure 2 is a perspective view of the DIN rail mounting bracket and DIN rail of Figure 1, shown having circuit breakers mounted thereon, with the DIN rail in its normal position; 5 Figure 3a is a perspective view of the DIN rail mounting bracket of Figure 1; Figure 3b is a schematic perspective view of the DIN rail mounting bracket of Figure 3a, in a disassembled form and showing the relationship of the parts of a stop member to a housing and a rotatable mount; 10 Figure 3c is a plan view of the housing only of the DIN rail mounting bracket of Figure 3a, Figure 3d is a perspective view from the rear of the DIN rail mounting bracket 15 of Figure 3a; Figure 4a is a perspective view of the DIN rail mounting bracket and DIN rail of Figure 1, shown having circuit breakers mounted thereon, with the DIN rail in a first angled position; and 20 Figure 4b is a perspective view of the DIN rail mounting bracket and DIN rail of Figure 1, shown having circuit breakers mounted thereon, with the DIN rail in a second angled position. 25 Description of the Embodiment Illustrated in the Drawings Illustrated in Figure 1 is an electrical enclosure 10 having side walls 12, top and bottom walls 14,16, a rear wall 18, and a door (not shown) mounted on hinges 20 to enclose the interior of the enclosure 10. The enclosure 10 is 30 adapted for use with a preferred embodiment of a DIN rail mounting bracket 30 (which will be described in more detail below in accordance with Figures 2 to 4b), the bracket 30 being shown mounted to the front face 32 of rear rails 34 (only one being visible in Figure 1) secured at opposed rear corners within the enclosure 10. A DIN rail 40 is shown mounted in the bracket 30.

- I I In this embodiment, the DIN rail 40 is mounted between the two rear rails 34 by way of left and right handed brackets 30 at either end thereof (although only one is visible in Figure 1). Also, while the embodiment shown in Figure 1 5 shows the rear rails 34 extending the full height of the interior of the enclosure 10, in some embodiments it is envisaged that the rear rails will not extend this full height. Figure 2 (together with Figures 4a and 4b) briefly illustrates the role played by 10 the DIN rail 40, shown in isolation of the enclosure 10 shown in Figure 1. The DIN rail 40 is shown having the typical "top hat" configuration mentioned above, and is shown having mounted thereon a series of three circuit breakers 42. These circuit breakers are not shown in Figure 1, and it will be appreciated that there would normally be a larger series of such circuit 15 breakers mounted thereon, and also of other electrical equipment, in actual installations. Referring now to the various views of Figures 3a to 3d for a better illustration of the bracket 30, there can be seen a rotatable mount 50 having a rail 20 mounting portion 52 located generally centrally therein. The rail mounting portion 52 is a recess having a size and configuration closely matched to the size and configuration of the end of the DIN rail 40 to be mounted therein, together with an opening 53 through which the DIN rail may be slid to enter and locate within the rail mounting portion 52. The insertion of the end of the 25 DIN rail 40 into the rail mounting portion 52 will be further described below. The bracket 30 also includes a stop member (part thereof being identified by the reference numeral 60, as will be explained below) capable of releasably engaging the mount 50 such that the mount 50 can be locked so that the DIN 30 rail 40 will be in either a normal position or at least one angled position - the normal position is the upright position of the DIN rail 40 illustrated in Figures 1 and 2, whereas two angled positions are illustrated in Figures 4a and 4b and will be described below.

The bracket 30 also includes a housing 70 for the mount 50, the housing 70 including securing members 72,74 for securing the bracket 30 to the rear wall 18 of the enclosure 10, rather than the side walls 12, via the two rear rails 34 mentioned above. The securing members 72,74 are simply shown as flanged 5 abutments that are able to be located within an aperture in a rear rail 34 and then moved downwardly to lock the flange behind the aperture to secure the bracket 30 in place. However, other methods of securement are also envisaged, such as the use of fasteners such as screws. 10 The mount 50 of the bracket 30 is shown having a circular body 76, which is rotatably received within a correspondingly sized and shaped recess 78 in the housing 70 (see Figure 3b). The circular body 76 is retained within that recess via a circular hub 77 that extends through the opening 81 and is retained behind that opening 81 by virtue of spring latches 79 (see Figure 3d). 15 The circular body 76 in this embodiment includes three rebates 80,82,84 in its periphery. The first rebate 80 is engageable such that the mount 50 can be locked with the DIN rail 40 in its normal position, the first rebate 80 thus being said to "define" that normal position. The second and third rebates 82 and 84 20 thus can be said to define a first and second angled position for the DIN rail. In this embodiment, the stop member is formed through the interaction of a manually operated latch 60 (already generally referred to above) and an engaging tab 86. The engaging tab 86 is resiliently biased into a rotatable 25 mount engaging position (which is the "at rest" position illustrated in Figures 3a and 3b), in which position the engaging tab 86 is able to engage with one of the rebates 80,82,84 of the circular body 76 of the mount 50 (in Figure 3a, with the first rebate 80) to lock the mount 50 with the DIN rail 40 in (as in Figures 1, 2 and 3a) the normal position. 30 The engaging tab 86 is provided in this embodiment by an elongate tongue formed integrally with the housing 70, as is best seen in Figure 3c. The engaging tab 86 extends from a base 88 to a free end 90, and includes a locking abutment 92 therebetween that extends abruptly upwardly on one side - I J from the base 88 but smoothly and continuously on the other side from the free end 90. The locking abutment 92 can be seen to extend into the recess 78 within which the circular body 76 of the mount 50 is located, so as to be able to engage with one of the rebates 80,82,84 mentioned above. 5 The integral and elongate nature of the engaging tab 86 in this embodiment provides the resilience required to operate in the above manner, in terms of its bias towards an at-rest engaging position. As can be seen, pressure applied to the engaging tab 86, particularly towards the free end 90 thereof, will move 10 the abutment away from, and below, the circular body 76 and will withdraw the locking abutment 92 from a rebate 80,82,84 to allow the circular body 76 to freely rotate within the recess 78. In this embodiment, it is the manually operable latch 60 (shown in Figure 3a in 15 its operation position) that is able to be operated to apply this pressure and to urge the engaging tab 86 away from its engaging position, against the bias of the engaging tab 86, to disengage the locking abutment 92 from a rebate 80,82,84, thus allowing the rotation of the mount 50. As the mount 50 rotates, the locking abutment 92 remains behind the circular body 76 until the next 20 rebate comes around to the location of the locking abutment 92. At that point, the resilient bias of the engaging tab 86 again urges the locking abutment into engagement with that next rebate so as to lock the mount 50 in that next position. 25 Thus, it can be seen that the manually operable latch 60 at least partially overlies the engaging tab 86, and is able to be pivoted across the engaging tab 86 about its pivoting connection point 87 from a rail locked position (such as that shown in Figure 3a), where the engaging tab 86 engages the mount 50 with the DIN rail 40 in either its normal position, to a rail free position where 30 the engaging tab 86 has been urged away from the mount 50 to disengage therewith and allow movement of the mount 50 between and to and from the DIN rail's normal and angled positions. The pivoting of the latch 60 is preferably provided by manual depression or raising of the latch 60 (as the case may be), and the subsequent pivotal movement of the latch 60 about its - I -T connection point 87, and the interaction of an abutment portion 99 thereof up and across (and subsequently across and down) the locking abutment 92. In this embodiment, the housing 70 also includes a DIN rail pathway 100, the 5 pathway 100 being located in the housing 70 so as to be accessible from external of the housing 70, and so as to align with the rail mounting portion 52 of the mount 50, to permit insertion of the end of a DIN rail 40, when the mount 50 is in the angled position shown in Figure 4a. 10 Reference will now be made to Figures 2, 4a and 4b, which show three different positions for the DIN rail 40. When in use inside an electrical enclosure 10, the DIN rail 40 will typically be mounted such that its longitudinal dimension extends substantially horizontally and its lateral dimension (the equipment mounting dimension) extends substantially 15 vertically (or upright), as can be seen in Figure 2. This is the position that is referred to throughout this specification as the DIN rail's normal position. The rotation of the rotatable mount 50 from this normal position to the position shown in Figure 4a, namely to a position referred to throughout this 20 specification as a first angled position for the DIN rail 40 (following the disengagement of the stop member 60 to release the DIN rail 40 from its normal position), can be seen as a rotation of the top of the DIN rail 40 from about vertical to about 45 degrees away from vertical (away from the rear of the electrical enclosure 10 and towards the front of the electrical enclosure 25 10). Thus, this rotation of the DIN rail 40 brings towards the front of the enclosure 10, and better exposes to the front, the top surfaces 43 of any equipment mounted on the DIN rail 40 when viewed from a height above the height of the DIN rail 40. This provides better access to, for example, the terminal tunnels in the top surfaces 43 of the circuit breakers 42. 30 Similarly, the rotation of the rotatable mount 50, again following the disengagement of the stop member 60 to release the DIN rail 40 from its normal position (Figure 2) to a second angled position (Figure 4b) provides rotation of the bottom of the DIN rail 40 from about vertical to about 45 - I 4/ degrees away from vertical (again away from the rear of the electrical enclosure and towards the front of the electrical enclosure). Thus, this rotation of the DIN rail 40 brings towards the front of the enclosure, and better exposes to the front, the bottom surfaces 45 of any equipment mounted on 5 the DIN rail 40 when viewed from a height below the height of the DIN rail 40. Finally, there may be other variations and modifications made to the configurations described herein that are also within the scope of the present invention. 10

Claims (23)

1. A DIN rail mounting bracket for mounting a DIN rail within an electrical enclosure, the bracket including: 5 a rotatable mount having a DIN rail mounting portion, the rotatable mount being capable of movement such that, in use, a DIN rail mounted on the rotatable mount can be moved between a normal position and at least one angled position; and a stop member capable of releasably engaging the rotatable 10 mount such that the rotatable mount can be locked in either the normal position or the at least one angled position.

2. A DIN rail mounting bracket according to claim 1, wherein the bracket includes a housing for both the rotatable mount and the stop member, 15 the rotatable mount and the stop member being configured within or as a part of the housing in such a manner that allows the releasable engagement of the rotatable mount with the stop member and the movement of the DIN rail between the normal position and the at least one angled position. 20

3. A DIN rail mounting bracket according to claim 2, wherein the housing includes a means for securing the housing within the interior of an electrical enclosure. 25

4. A DIN rail mounting bracket according to any one of claims 1 to 3, wherein the rotatable mount is in the form of a circular body having the DIN rail mounting portion located generally centrally thereof.

5. A DIN rail mounting bracket according to claim 4, wherein the circular 30 body is able to be rotatably received within a correspondingly sized and shaped recess in the housing.

6. A DIN rail mounting bracket according to claim 5, wherein the circular body includes at least two rebates in its periphery, a first rebate - I f defining the normal position and a second rebate defining one angled position, each rebate being configured to be releasably engaged by the stop member to lock the circular body in the normal and angled positions. 5

7. A DIN rail mounting bracket according to claim 6, wherein the DIN rail mounting portion of the rotatable mount is configured so as to slidably receive an end of a DIN rail therewithin, from external of the periphery of the circular body. 10

8. A DIN rail mounting bracket according to claim 7, wherein the housing includes a DIN rail pathway, the DIN rail pathway being located in the housing so as to be accessible from external of the housing, and so as to align with the DIN rail mounting portion of the rotatable mount, to 15 permit insertion of a DIN rail from external of the housing to the rail mounting portion when the rotatable mount is in one of the angled positions.

9. A DIN rail mounting bracket according to any one of claims 1 to 8, 20 wherein the stop member includes an engaging tab and a manually operable latch.

10. A DIN rail mounting bracket according to claim 9, wherein the engaging tab is resiliently biased into a rotatable mount engaging position, in 25 which position the engaging tab is able to engage with the rotatable mount to lock the rotatable mount with the DIN rail in either the normal position or the at least one angled position.

11. A DIN rail mounting bracket according to claim 10, wherein the 30 manually operable latch is able to be operated to urge the engaging tab away from its engaging position, against the bias of the engaging tab, to disengage the engaging tab from the rotatable mount and thus allow rotation of the rotatable mount to allow movement of the DIN rail from the normal position to an angled position and vice-versa. - IlU

12. A DIN rail mounting bracket according to any one of claims 9 to 11, when appended through claim 2, wherein the engaging tab is provided by an elongate tongue either formed in or secured to the housing. 5

13. A DIN rail mounting bracket according to claim 12, wherein the engaging tab is formed integrally with the housing, having a free end and a based end and a locking abutment therebetween. 10

14. A DIN rail mounting bracket according to any one of claims 9 to 13, wherein the manually operable latch at least partially overlies the engaging tab, and is able to be pivoted across the engaging tab from a rail locked position, where the engaging tab engages the rotatable mount with the DIN rail in either its normal or angled positions, to a rail 15 free position where the engaging tab has been urged away from the rotatable mount to disengage therewith and allow movement of the rotatable mount between and to and from the DIN rail's normal and angled positions. 20

15. A DIN rail mounting bracket according to claim 1 substantially as herein described in relation to the accompanying drawings.

16. An electrical enclosure having at least one DIN rail mounting bracket in accordance with any one of claims 1 to 15 secured therewithin. 25

17. An electrical enclosure according to claim 16, wherein the bracket includes a housing for the rotatable mount, the housing including a means for securing the housing within the interior of the electrical enclosure. 30

18. An electrical enclosure according to claim 17, wherein the securing means secures the bracket to the rear wall of the electrical enclosure via one or more rear rails.

19. An electrical enclosure according to claim 18, wherein the electrical enclosure includes at least two rear rails, arranged to be upright at the rear corners of the electrical enclosure, the rear rails including at least a front face to which the housing is secured. 5

20. An electrical enclosure according to claim 16 substantially as herein described in relation to the accompanying drawings.

21. An electrical enclosure adapted for use with a DIN rail mounting 10 bracket in accordance with any one of claims 1 to 15, the electrical enclosure including two or more rear rails between which a DIN rail may be mounted, each of the rear rails including a front face to which the bracket may be secured. 15

22. An electrical enclosure according to claim 21, wherein the rear rails are arranged to be upright at the rear corners of the electrical enclosure.

23. A kit including one or more DIN rail mounting brackets according to any one of claims 1 to 15, together with one or more lengths of DIN rail. 20