Many products are designed to include modules that can be removed from a main housing for service or replacement. Cables, in particular power cables, attach into such modules. In order to remove the module from the main housing for service, the power cable should first be removed from the module as a safety precaution. Failure to remove the power cable from the module prior to removal of the module from the main housing exposes service personnel to dangerous voltage levels carried by the cables.
Underwriter's Laboratories (UL) requires power cables be secured to their respective modules in a manner that requires a tool to remove the cable from the module. By requiring a tool for removal of the power cable from the module, inadvertent removal of the power cable is prevented.
An embodiment of the present invention includes a securing mechanism having a housing with a connector latch and a module latch moveably mounted within the housing. The connector latch is engageable with a connector, as on a power cable, to secure the connector while the module latch is engageable with a housing support. Engagement of the connector latch with the connector causes the module latch to engage the housing support.
The securing mechanism prevents removal of a module and attached connector from a housing support without a user first removing the connector from the module. An embodiment of the invention also relates to a method for securing a module to and removing a module from a housing support.
The connector latch includes a position adjustment mechanism that controls movement of the connector latch. A tool is required to move the position adjustment mechanism, thereby preventing inadvertent removal of a connector from the module. The housing can include a tool guide aperture to allow user access of the position adjustment mechanism. The securing mechanism also includes a tool securing mechanism, such as a slot within the housing of the securing mechanism that, after being engaged, prevents motion of the latch and prevents motion of the tool within the securing mechanism. Either the connector latch or the module latch can include a low friction surface to minimize binding of the latch within the housing. The securing mechanism also includes a biasing mechanism, such as a spring, to position the connector latch and the module latch within the housing.
The connector latch and module latch can form a single latch. The single latch includes a connector latch protrusion and a module latch protrusion. The securing mechanism can include a housing and a connector latch moveably mounted within the housing, the connector latch engageable with a connector to secure the connector. The securing mechanism can also include a housing and a module latch moveably mounted within the housing, the module latch engageable with a housing support to secure the module.
An embodiment of the invention also relates to a module having a module housing and a securing mechanism, as described. The securing mechanism is preferably affixed to the module housing.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
A description of preferred embodiments of the invention follows.
A securing mechanism, given generally as 10, is illustrated in
The securing mechanism 10 includes a housing 16 and a latch 22. The housing 16 and latch 22 can be machined, molded or zinc die cast, for example. The housing 16 includes a pin 20 which is inserted through a housing aperture 36 within the housing 16. The pin 20 is secured to the housing 16 by a friction fit, adhesive or threads, for example. The pin 20, which can be formed of a plastic or stainless steel material for example, acts to guide the motion of the latch 22 within the housing 16. A connector aperture 26 and mounting or fastener apertures 28 are also located on the housing 16. The connector aperture 26 engages a mating connector 72 on a module while the fastener apertures 28 allow the securing mechanism 10 to be mounted to a module.
The latch 22 preferably includes a connector latch protrusion 12 and a module latch protrusion 14. The connector latch protrusion 12 engages a connector 52 for securing of the connector 52 to a module. The module latch protrusion 14 engages a housing support for securing of the module 50 to the housing support 56. Engagement of the connector latch protrusion 12 with a connector 52 prevents removal of the connector 52 from the module 50, to which the mechanism 10 is attached, without the use of a tool. When a connector 52 has been engaged with the connector latch protrusion 12, the module latch protrusion 14 is engaged with a housing support 56, thereby preventing the removal of the module 50 from the housing support 56.
The latch 22 can also include a low friction surface 32, shown in FIG. 1. The low friction surface 32 can be a low friction polymer such as Delrin or Teflon, for example. The low friction surface 32 allows the latch 22 to move within the housing 16 while minimizing binding, sticking or jamming of the latch 22. The securing mechanism 10 also includes a spring 18 or biasing mechanism and a latch aperture 34. The spring 18 is located between the latch 22 and an interior of the housing 16 and is positioned around the pin 20. The spring 18 biases the latch 22 away from a top surface 40 of the housing 16 and positions the cable protrusion 12 and module protrusion 14 within the housing 16. Pin 20 fits within the latch aperture 34 of the latch 22 when the latch 22 is placed within the interior of the housing 16. The pin aperture 34 allows the latch 22 to move vertically within the housing 16.
The latch 22 includes a tool insertion receptacle or position adjustment mechanism 24. The position adjustment mechanism 24 allows a user to control the positioning of the latch 22 within the housing 16. The position adjustment mechanism 24 also requires the use of a tool to install or remove a connector from the module. In one embodiment, the position adjustment mechanism 24 is triangular shaped having a height 37 of approximately 0.125 inches and abase length 39 of approximately 0.125 inches. The housing 16 includes a tool guide aperture 30 to allow a user access to the position adjustment mechanism 24. In one embodiment, the tool guide aperture 30 is a narrow slot oriented vertically with respect to the housing 16. The tool guide aperture 30 can have a width 33 of approximately 0.062 inches and a height 35 of approximately 0.45 inches. When the latch 22 is located within the housing 16, a user can place a tool through the tool guide aperture 30 and engage the position adjustment mechanism 24. The tool can be, for example, a screwdriver, a paperclip, or an awl.
The housing 16 can also include a tool securing mechanism 38. The tool securing mechanism 38 can include a notch located within the tool guide aperture 30. The tool securing mechanism 38 can include a width 43 of approximately 0.11 inches and a height 41 of approximately 0.136 inches. The tool securing mechanism 38 allows a user to secure the latch 22 in a raised position after having moved the latch 22 toward the top surface 40 of the housing 40. Such positioning of the latch 22 allows a user to engage a connector 52 to a mating connector 72 housed by the connector aperture 26 of the housing 16. The tool securing mechanism 38 also allows a user to lock the tool in a stationary position, thereby allowing the user to remove his hands from the tool to manipulate the connector and module.
Once the module 50 is in proximity to the housing support 56, a user then inserts a tool 60 within the tool guide aperture 30 of the housing 16 and engages the position adjustment mechanism 24. The user moves the latch 22 towards a top surface 40 of the housing 16. Such movement positions the connector latch protrusion 12 away from the mating connector 72, thereby allowing the connector 52 to engage the mating connector 72. When the user moves the latch 22 towards the top surface 40 of the housing 16, the module latch protrusion 14 engages the housing support 56. The user can secure or lock the latch 22 in a raised position by engaging the tool 60 with the tool securing mechanism 38 located on the housing 16. Such locking prevents the biasing mechanism 18 from expanding and forcing the latch 22 away from the top surface 40 of the housing 16 thereby causing the connector protrusion 12 to block mating connector 72. The tool securing mechanism 38 also secures the tool in a single position to allow the user to have both hands available to engage the connector 52 to the mating connector 72 of the module 50.
Preferably, the connector 52 includes a flange 54. Once the user has engaged the connector 52 to the mating connector 72, the user removes the tool 60 from the tool securing mechanism 38 thereby allowing the latch 22 to be positioned away from the top surface 40 of the housing 16. The connector latch protrusion 12 engages the flange 54 on the connector 52, thereby preventing the removal of the connector 52 from the mating connector 72 without the use of the tool 60. Where the connector 52 does not include a flange 54, the connector latch protrusion 12 can engage a portion of the connector to secure the connector 52 to the module 50. The module latch protrusion 14 remains engaged with the housing support 56 when the latch 22 is positioned away from the top surface 40 of the housing 16. Engagement of the module latch protrusion 14 with the housing support 56 prevents the module 50 from sliding forward in the housing support 56 beyond the support tabs 67.
To remove the connector 52 from the module 50, a user engages the position adjustment mechanism 24 with a tool and positions the latch 22 toward a top surface 40 of the housing 16. The connector 52 is then removed from the mating connector 72. Lowering the position adjustment mechanism 24 disengages the module latch protrusion 14 from the housing support 56, allowing removal of the module 50 from the support 56. The module 50 can then slide forward within the housing support 56, causing fasteners 66 to slide forward on housing support tabs 67. When the fasteners 66 engage the housing support apertures 68, the module 50 can be removed from the housing support 56.
To attach the module 50 to the pump assembly 80, fasteners 66 on the module 50 mate with housing support apertures 68 on the housing support 56. Sliding the module 50 within the housing support 56 causes the fasteners 66 of the module 50 to slide back over the housing support tabs 67. The fasteners 66 and the module 50 are supported within the housing support 56 on the pump assembly 80 by the housing support tabs 67. A tool is used in conjunction with the securing mechanism 10 to move the position adjustment mechanism 24 within the housing 16 such that a connector 52 engages the module 50 and the module 50 engages the housing support 56 of the pump assembly 80. By using the securing mechanism 10, the module 50 cannot be removed from the pump 80 unless the connector 52 is first removed from the module 50.
To attach the module 50 to the RDS 82, fasteners 66 on the module 50 mate with housing support apertures 68 on the housing support 56. Sliding the module 50 within the housing support 56 causes the fasteners 66 of the module 50 to slide back over the housing support tabs 67. The fasteners 66 and the module 50 are supported within the housing support 56 on the RDS 82 by the housing support tabs 67. A tool is used in conjunction with the securing mechanism 10 to move the position adjustment mechanism 24 within the housing 16 such that a connector 52 engages the module 50 and the module 50 engages the housing support 56 of the RDS 82. This engagement is shown in FIG. 15. By using the securing mechanism 10 the module 50 cannot be removed from the RDS 82 unless the connector 52 is first removed from the securing mechanism 10.
The tool guide aperture 104 is rectangular shaped, having a length 112 of approximately 0.23 inches and a height 114 of approximately 0.235 inches. The aperture 104 allows a user to access the position adjustment mechanism 102 of the latch 22 using a tool having a flat shape, such as a flat head screwdriver, for example.
The tool securing mechanism or slot 106 corresponds to the shape of the tool insertion receptacle 102 and includes a length 116 of approximately 0.44 inches and a width 118 of approximately 0.06 inches. The slot 106 is a transverse slot and allows a user to lock a tool in a stationary position, thereby allowing the user to remove his hands from the tool. The slot 106 also allows the user to secure the latch 22 in a raised position, thereby preventing motion of the latch 22 within the housing 16. To lock the tool within the housing 16, the user first inserts the tool into the tool guide aperture 102 of the housing 16 and engages the position adjustment mechanism 102 of the latch 22. The user raises the latch 22 within the tool guide aperture 102 until the tool is engageable with the slot 106 on the housing 16. The user can then position the tool within the slot 106 by sliding the tool to the right edge or to the left edge within the slot 106. This positioning of the tool within the slot 106 prevents the lowering of the latch 22 and allows the tool to remain in a stationary position, thereby securing the latch 22 and the tool.
In an alternate embodiment, the securing mechanism 10 includes only a connector latch protrusion 12 as shown in
In another embodiment, the securing mechanism 10 includes only a module latch or module latch protrusion 14 as shown in
While the connector latch protrusion 12 and module latch protrusion 14 are illustrated as being formed as part of a single latch 22, the connector latch protrusion 12 and module latch protrusion 14 can be formed as separate components within the securing mechanism, as shown in FIG. 24. For example, a connector latch 112 and a module latch 114 can be formed in a securing mechanism 10 as two interlocking components whereby motion of the connector latch 112 caused by the position adjustment mechanism 24 controls the motion of the module latch 114.
While this invention has been particularly shown and described with references to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
This application claims the benefit of U.S. Provisional Application No. 60/263,168, filed on Jan. 22, 2001. The entire teachings of the above application are incorporated herein by reference.
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Number | Date | Country | |
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20020098731 A1 | Jul 2002 | US |
Number | Date | Country | |
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60263168 | Jan 2001 | US |