GB2442584A

GB2442584A - Securing lid of junction box

Info

Publication number: GB2442584A
Application number: GB0719169A
Authority: GB
Inventors: Montse Pinol Pedret; Ramon Aquila Caceres
Original assignee: Lear Corp
Current assignee: Lear Corp
Priority date: 2007-10-02
Filing date: 2007-10-02
Publication date: 2008-04-09
Also published as: GB0719169D0

Abstract

A junction box assembly has a cover 12 which can be removed by one hand. A closure member 16 has an opening 16a and a closure panel (16d, Fig 1C). A locking member (18, Fig 1B) goes into the opening and pushes the closure panel outwards against a blocking member (24, Fig 1A) which secures the cover to the box. When the locking member is removed, the cover can be hinged open slightly and engagement members 28a, 29a unhooked from hinge members 32, 30. The box may have a seal (see Fig 3C) between the box and the cover; and it may have grommet positioners 34, drainage means (23, Fig 4B) and/or board positioning means (20, Fig 2).

Description

JUNCTION BOX ASSEMBLY

The embodiments of this invention described herein relate to a junction box assembly.

Junction box assemblies are configured to contain a plurality of electrical devices such as fuses, connectors and the like. When installed in a vehicle, it is desirable that the electronics within the junction box assembly remain free of fluids and debris that could damage the electronics. Accordingly, designers have developed a number of sealing mechanisms in an effort to protect the electronics from undesirable elements. However, many of these sealing mechanisms fail over time due to excessive wear and/or movement/vibration of the junction box assembly walls.

Additionally, it is well known that conventional junction box assemblies require a minimal level of rigidity to prevent deforming of the junction box assembly walls.

Furthermore, it is known that the junction box assembly typically requires a member(s) for positioning and stabilizing the electronics within the junction box. A conventional junction box assembly designed to address the above needs is shown in Figure 5. Figure 5 includes the interior portions of a conventional junction box. The junction box has side wall ribs 60, a positioning member 62, and a positioning member 64. Ribs 60, which are thinly molded members, provide structural support to the sidewalls of the junction box assembly. However, after manufacturing of ribs 60, it is known that imprints of ribs 60 may appear on the outer surface of are the junction box assembly.

This is highly undesirable to customers.

Positioning members 62 and 64 provide a means for holding the electronics (not shown). The positioning members 62 and 64 are burdensome to manufacture. As such, with the conventional junction box assembly the ribs 60 and positioning members 62 and 64 are required for providing structural support and positioning of the electronics.

Furthermore, junction box assemblies are commonly located within an engine compartment of a vehicle. In such a case, access to the electronics within the junction box assembly is compromised by the construction of the junction box assembly. Specifically, the design of the hinges on conventional junction box assemblies prevents easy removal of a cover of the junction box assembly. It is known that conventional junction box assemblies require two hands for removal of the junction box assembly cover. An example of such a conventional junction is shown in Figure 6. The prior art junction box hash a hinge bracket 76 and a hinge member 78. As stated above, conventional junction boxes, such as the junction box in Figure 6, require two hands to remove the cover from the junction box assembly due to the hinge brackets 76 and 78.

The embodiments described herein were conceived in view of these and other disadvantages of conventional junction box assemblies.

This application is also related to U.S. patent application entitled "INSERT, PLASTIC PART ASSEMBLY UTILIZING SAME AND DIE-CASTING MOLD FOR MAKING THE INSERT" filed on the same day as this application and having U.S. Serial No. ll/538929and Attorney Docket No. LEAR 43919 PUS.

It is therefore desirable to provide an improved junction box assembly which addresses the above described problems and/or which more generally offers improvements or an alternative to existing arrangements.

According to the present invention there is therefore provided a junction box assembly as described in the accompanying claims.

The embodiments described herein include a junction box assembly configured to enclose an electrical assembly.

The junction box assembly includes a junction box cover having an upper portion and a lower portion, wherein the upper portion and the lower portion have a closure member integrated thereto. The closure member has an opening for receiving a locking member. The lower portion also has a first latch and a second latch extending therefrom, wherein the first latch terminates at a first engagement portion and the second latch terminates at a second engagement portion.

A base member is also included, which has a plurality of connecting sidewalls that extend from a bottom wall to form a cavity. In one embodiment, one wall includes a first hinging member and a second hinging member that are configured to receive the first engagement portion and the second engagement portion, respectively. A second sidewall has a blocking member that engages the closure member. The locking member is configured to force the closure member against the locking member when the locking member is received within the opening of the closure member, thereby securing the junction box cover to the base member.

The features of the embodiments herein are set forth with particularity in the appended claims. The present invention, both as to its organization and manner of operation, together with further advantages thereof, may be best understood with reference to the following description, taken in connection with the accompanying drawings in which: Figure 1A illustrates a junction box assembly according to an embodiment of the present invention; Figures 13 and 1C are enlarged illustrations of a locking member and a closure member shown in Figure 1A in accordance with an embodiment of the present invention; Figure 2 provides a detailed illustration of a base member of Figure 1A in accordance with an embodiment of the present invention; Figure 3A illustrates a junction box assembly having a junction box cover separated from a base member in accordance with an embodiment of the present invention; Figure 3B is an enlarged view of an hinging mechanism for a junction box assembly in accordance with an embodiment of the present invention; Figure 3C is an enlarged view of a seal for a junction box assembly in accordance with the present invention; Figures 4A and 43 are enlarged illustrations of a grommet positioner in accordance with an embodiment of the present invention;

Figure 5 is a prior art junction box assembly; and

Figure 6 is a prior art junction box assembly

illustrating a conventional hinging mechanism.

As required, detailed embodiments are disclosed herein. However, it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The figures are not necessarily to scale, and some features may be exaggerated or minimized to show details of particular components. Therefore, specific functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for the claims and/or as a representative basis for teaching one skilled in the art to variously employ in the present invention.

Figure lA illustrates a junction box assembly 10 in accordance with an embodiment of the present invention.

The junction box assembly 10 may be formed through an injection molding process. Additionally, the junction box assembly 10 may be formed of a polypropylene, polyester, polyamide, and/or any other filled or unfilled plastic materials.

Junction box assembly 10 includes a junction box cover 12 and a base member 14. An upper portion 12a and a lower portion 12b form junction box cover 12. As will be describe below, the lower portion l2b includes a sealing member that enables the junction box cover to be sealed to the base member 14. The upper portion 12a and lower portion 12b have a closure member 16 integrated thereto.

The closure member 16 enables the junction box cover 12 to be secured to the base member 14.

Closure member 16 includes an opening 16a for receiving a locking member 18. As shown in Figure 1B, the locking member 18 includes a first end 18a and a second end 18b. The second end l8b has a shape that corresponds to the shape of opening 16a. The first end 18a is substantially flat to enable the locking member 18 to be pushed into the opening l6a or pulled from opening l6a.

Inserting locking member 18 fully into the opening 16a secures junction box cover 12 to base member 14.

Alternatively, pulling locking member 18 out of opening 16a allows movement of junction box cover 12.

As shown, closure member 16 also includes a closure member panel l6d. In Figure lC, the opening l6a is defined by the closure member panel 16d and brackets l6d. Brackets l6b are L-shaped brackets that extend from the closure member panel to define the opening 16a. The closure member 16 also includes multiple biasing members l6c. Biasing members l6c help bias the locking member 18 away from the junction box assembly 10 in the direction of closure member panel 16d when the locking member is received within opening 16a.

Referring specifically to Figure 1A, the base member 14 includes a plurality of connected sidewalls 14a, 14b, 14c, and 14d. Sidewalls l4a, 14b, 14c, and 14d extend from a bottom wall 15 to form a cavity within the base member 14. As recognized by one of ordinary skill in the art, the cavity is an area within the base member for enclosing an electrical assembly (not shown) such as a fuse and or electrical distribution box.

As shown, sidewall l4b includes a blocking member 24.

The blocking member 24 is rigidly formed to project outward away from base member 14 to inhibit movement of closure panel 16d when the locking member 18 is received within opening 16a. When locking member 18 is received within opening l6a, the closure member panel 16d is forced outward until it contacts blocking member 24. As locking member 18 is fully inserted in opening 16a, the closure member panel 16d is forced against blocking member 24 thereby establishing a secure fitting between junction box cover 12 and base member 14.

Referring to Figure 2, a detailed illustration of base member 14 is provided. As described in the foregoing, base member 14 includes a plurality of connected sidewalls 14a-14d and a bottom wall 15 that define a cavity 17. The sidewalls 14a-14d include an upper area 21 that is located at the top of sidewalls 14a-14d. Multiple positioners 20 are integrated with at least one sidewall and enable positioning and securing of the electrical assembly (not shown) within the base member. Positioners 20 have a substantially rectangular shape and a top side 20a that is in close proximity to upper area 21. In one embodiment, the top side 20a is less than 1 inch (2.54 centimeters) from the top of the sidewalls 14a-14d. Accordingly, the -7-.

embodiments described herein do not require structural ribs in addition to positioning members for positioning an electrical assembly and providing structural support to the junction box sidewalls. The positioners 20 are configured to provide robustness to the sidewalls and optimally position the electrical assembly within the junction box assembly.

Integrated with bottom wall 15 are drainage members 23. The drainage members cover a drain holes 22 that allow fluids within base member 14 to exit. Drainage members 23 extend from the bottom wall 15 and have a top 23a and sides 23b. The top 23a and sides 23b enable fluids that enter the junction box assembly to be channeled in a substantially horizontal direction so as to minimize the chance of fluids reaching the electrical assembly enclosed therein.

Now, referring to Figure 3A, an alternative view of a Junction box is shown. In this view, junction box cover 12 is shown having latches 28 and 29. Lower portion 12b has latches 28 and 29 extending therefrom. Latch 28 terminates at an engagement portion 28a, while latch 29 terminates at an engagement portion 29a. Additionally, base member 14 includes hinging members 32 and 30. The hinging member 32 and 30 are configured to receive the engagement portion 28a and 29a respectively. The configuration of the engagement portion 29a and 28a coupled with the configuration of hinging members 30 and 32 enable the junction box cover 12 to be lifted slightly and rotated degrees or less in reference to the base member to remove the junction box coverl2. As such, removal of junction box cover 12 does not require two hands as with prior art junction box assemblies. Figure 3B illustrates a cross-sectional view of latch 29 having engagement portion 29a received by hinging member 30.

Figure 3A also illustrates a grommet positioner 34 that defines a grommet opening for receiving a grommet. As recognized by one of ordinary skill in the art, the grommet is a sealing device through which wires enter the junction box assembly for connection to the internal electrical assembly. The grommet positioner 34 as shown is U-shaped and defines a grommet opening.

Referring to Figure 3C, an enlarged cross-sectional view of junction box cover 12 and sidewall l4d is shown.

Sidewall 14d includes a ledge 38 that projects laterally outward from sidewall 14d. As illustrated, the lower portions 12b of junction box cover 12 include a sealing member which may be formed of an elastic material. The sealing member may be a single or multiple sealing members.

Accordingly, the sealing member includes an internal sidewall sealing portion 40 and a top edge sealing portion 42. As the junction box cover 12 is installed on the base member 14, the junction between the junction box cover and the base member is sealed to minimize fluid ingress.

Now, referring to Figures 4A and 4B, enlarged views of grommet positioner 34 are provided. The grommet positioner 34 helps ensure optimal placement of a grommet into the base member 14. Accordingly, the grommet positioner includes a rim 48 that extends substantially normal from sidewalls of the base member 14. A flange also extends downward from rim 48 to be substantially parallel with the sidewalls. Accordingly, the rim 48 and flange 50 define the opening for the grommet.

A grommet positioner lip 46 is integrally molded with flange 50. Grommet positioner lip 46 is located at the bottom of the U-shaped grommet positioner 34. Grommet positioner lip 46 extends from flange 50 in a direction away from the cavity within the base member. In Figure 4B, a view looking outward from cavity 17 of grommet positioner 34 is provided.

Within the cavity 17, are multiple projections 54.

Projections 54 are located within the cavity 17 and have a first side 54a and a second side 54b. First side 54a extends upward in a direction away from bottom wall in a manner that is substantially parallel with a sidewall.

Additionally, the first side 54a terminates at the second side 54b. The second side which is located at the bottom of the grommet positioner has a position that is normal to the sidewall. The projections 54 form a guide for the positioning of a grommet within the opening defined by grommet positioner 34.

While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the scope of the invention.

Claims

CLAI MS

1. A junction box assembly configured to enclose an electrical assembly, the assembly comprising: a junction box cover having an upper portion and a lower portion, the upper portion and the lower portion having a closure member integrated thereto, wherein the closure member has an opening for receiving a locking member, the lower portion having a first latch and a second latch extending therefrom, the first latch terminating at a first engagement portion and the second latch terminating at a second engagement portion; a base member having a plurality of connected sidewalls that extend from a bottom wall to form a cavity, wherein one sidewall includes a first hinging member and a second hinging member that are configured to receive the first engagement portion and the second engagement portion, respectively; and wherein a second sidewall has a blocking member that engages the closure member and the locking member forcing the closure member against the blocking member when the locking member is received within the opening of the closure member, thereby securing the junction box cover to the base member.

2. The assembly of claim 1, further comprising a drainage member that is integrated with the bottom wall for channeling fluids out of the base member, the drainage member covering a drain hole and extending from the bottom wall.

3. The assembly of claim 1 or 2, further comprising a plurality of positioners being integrated with at least one sidewall for positioning the electrical assembly within the base member arid providing structural support for the sidewall, the positioners, having a substantially rectangular shape and a top side that is in close proximity to an upper area of the sidewall.

4. The assembly of any preceding claim, wherein the first latch and the second latch allow the junction box cover to be removed from the base member by rotating the junction box cover 10 degrees or less in reference to the base member.

5. The assembly of any preceding claim, wherein the closure member includes multiple brackets that extend from a closure member panel, the brackets and the closure member panel defining the opening for receiving the locking member.

5. The assembly of claim 5, wherein the closure member includes multiple biasing members for biasing the locking member away from the junction box assembly in the direction of the closure member panel when the locking member is received within the brackets that define the opening.

7. The assembly of any preceding claim, wherein the blocking member is rigidly formed to project outward away from the base member to inhibit movement of the closure member panel when the locking member is received.

8. The assembly of any preceding claim, further comprising: at least one grommet positioner located on a sidewall of the base member, the grommet positioner being U-shaped and defining a grommet opening, the grommet positioner having a rim that extends substantially normal from at least one sidewall; and a flange that extends downward from the rim substantially parallel with the sidewall, wherein the rim and the sidewall define an opening.

9. The assembly of claim 8, further comprising a grommet positioner lip integrally molded with the flange at a bottom of the U-shaped grommet positioner, wherein the grommet positioner lip extends from the flange in a direction away from the cavity.

10. The assembly of claim 8 or 9, further comprising multiple projections being located within the cavity and having a first side and a second side, the first side extending upward in a direction away from the bottom wall to be substantially parallel with the sidewall, the first side terminating at the second side at the bottom of the grommet positioner, the second side extending from the bottom of the grommet positioner in a position that is normal to the sidewall, wherein the projections form a guide for the positioning of a grommet.

11. The assembly of any preceding claim, further comprising a top edge sealer and an internal sidewall sealer within the lower portion of the junction box cover, the top edge sealer and the internal sidewall sealer providing a seal between the junction box cover and the base member.

12. A junction box assembly configured to enclose an electrical assembly, the assembly comprising: a junction box cover having an upper portion and a lower portion, the upper portion and the lower portion having a closure member integrated thereto, wherein the closure member has an opening for receiving a locking member, the lower portion having a first latch and a second latch extending therefrom, the first latch terminating at a first engagement portion and the second latch terminating at a second engagement portion; the lower portion further including a sealing member located therein; a base member having a plurality of connected sidewalls that extend from a bottom wall to form a cavity, the bottom wall having multiple drainage members for channeling fluids that enter the junction box assembly in a substantially horizontal direction, the sidewalls having a lateral ledge that projects from the sidewalls away from the cavity, the lateral ledge enabling a seal between the junction box cover and the base member through the use of the sealing member; and wherein one sidewall includes a first hinging member and a second hinging member, the first hinging member being configured to receive the first engagement portion and the second hinging member being configured to receive the second engagement portion, wherein a second sidewall has a blocking member that engages the closure member, the locking member forcing the closure member against the blocking member when the locking member is received within the opening of the closure member, thereby securing the junction box cover to the base member.

13. The assembly of claim 12, further comprising a plurality of positioners being integrated with at least one sidewall for positioning the electrical assembly within the base member and providing structural support for the sidewall, the positioners, having a substantially rectangular shape and a top side that is in close proximity to an upper area of the sidewall.

14. The assembly of claim 12 or 13, wherein the first latch and the second latch allow the junction box cover to be removed from the base member by rotating the junction box cover 10 degrees or less in reference to the base member.

15. The assembly of any of claims 12 to 14, wherein the closure member includes multiple brackets that extend from a closure member panel, the brackets and the closure member panel defining the opening for receiving the locking member.

16. The assembly of claim 15, wherein the closure member includes multiple biasing members for biasing the locking member away from the junction box assembly in the direction of the closure member panel when the locking member is received within the brackets that define the opening.

17. A junction box assembly configured to enclose an electrical assembly, the assembly comprising: a junction box cover having an upper portion and a lower portion, the upper portion and the lower portion having a closure member integrated thereto, wherein the closure member includes a closure member panel and an opening for receiving a locking member, the closure member including two L-shaped brackets that extend from the closure member panel, the brackets and the closure member panel defining the opening for receiving the locking member; wherein the lower portion has a first latch and a second latch extending therefrom, the first latch terminating at a first engagement portion and the second latch terminating at a second engagement portion; and a base member having a plurality of connected sidewalls that extend from a bottom wall to form a cavity, wherein one sidewall includes a first hinging member and a second hinging member that is configured to receive the first engagement portion and the second engagement portion, respectively and wherein a second sidewall has a blocking member that engages the closure member, the locking member forcing the closure member against the blocking member when the locking member is received within the opening of the closure member, thereby securing the junction box cover to the base member.

18. The assembly of claim 17, further comprising a plurality of positioners being integrated with at least one sidewall for positioning the electrical assembly within the base member and providing structural support for the sidewall, the positioners having a substantially rectangular shape and a top side that is in close proximity to an upper area of the sidewall.

19. The assembly of claim 17 or 18, further comprising: at least one grommet positioner located on a sidewall of the base member, the grommet positioner being U-shaped and defining a grommet opening, the grommet positioner having a rim that extends substantially normal from at least one sidewall; and a flange that extends downward from the rim substantially parallel with the sidewall, wherein the rim and the sidewall define an opening.

20. The assembly of claim 19, further comprising a grommet positioner lip integrally molded with the flange at a bottom of the U-shaped grommet positioner, wherein the grommet positioner lip extends from the flange in a direction away from the cavity.

21. A junction box substantially as hereinbefore described with reference to, and/or as shown in any one or more of figures 1 to 4C.