Patent Publication Number: US-11659949-B2

Title: Mounting bracket lock

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/933,269, filed Jul. 20, 2020, which is a continuation of U.S. patent application Ser. No. 16/458,213, filed Jul. 1, 2019, now U.S. Pat. No. 10,716,423, issued on Jul. 21, 2020, which is a continuation of U.S. patent application Ser. No. 15/268,124, filed Sep. 16, 2016, now U.S. Pat. No. 10,334,977, issued on Jul. 1, 2019, which claims priority to U.S. provisional patent application No. 62/220,069, filed Sep. 17, 2015, each of which is incorporated herein by reference in its entirety. 
    
    
     BACKGROUND 
     A window treatment may be mounted in front of one or more windows, for example to prevent sunlight from entering a space and/or to provide privacy. Window treatments may include, for example, roller shades, roman shades, venetian blinds, or draperies. A roller shade typically includes a flexible covering material, such as a shade fabric, that is wound onto an elongated roller tube. Such a roller shade may include a weighted hembar located at a lower end of the shade fabric. The hembar may cause the shade fabric to hang in front of one or more windows that the roller shade is mounted in front of. 
     Typically, a window treatment includes a housing that is configured to be attached to structure, such as a window frame. The housing may be configured to support one or more components of the window treatment in a mounted position. For example, the housing of a typical roller shade may be configured to operably support the roller tube, such that the covering material may be raised and lowered. 
     Such a housing may include a rail that is elongate between opposed ends, and a pair of housing brackets that are configured to attach to the ends of the rail. The housing brackets may be configured to support respective ends of the roller tube. In a typical configuration of such a housing, the rail may be configured to be attached to structure surrounding an opening, for example using fasteners such as screws. The housing brackets may be configured to be snapped into place at corresponding ends of the rail. The roller tube may then be attached to the housing brackets. 
     However, such snap-in mounting brackets may be prone to becoming detached from the rail, for example if the roller tube is bumped or otherwise dislodged from its snapped-in position relative to the rail. A known solution to such a problem is to secure the housing brackets in place relative to the rail, for example using screws. 
     However, such a solution may have undesirable consequences. For example, installing screws in a window treatment housing may be difficult or awkward with common tools (e.g., due to obstructing parts, cramped space, awkward tool angles, etc.). Additionally, once such a window treatment is installed and in a fully assembled configuration, components of the window treatment, such as the roller tube, may conceal the screws and/or obstruct access to them, which may make subsequent maintenance or removal undesirably difficult (e.g., to a user that did not install the window treatment or who is unfamiliar with how the housing brackets are secured to the rail). 
     SUMMARY 
     As described herein, a window treatment may include a mounting bracket lock. The mounting bracket lock may be configured to secure a mounting bracket of the window treatment housing to a rail of the housing. The mounting bracket lock may be configured to be attached to the rail such that it is moveable along the rail (e.g., slidable along the rail) between a locked position in which the mounting bracket lock prevents the mounting bracket from detaching from the rail, and an unlocked position in which the mounting bracket may be detached from the rail. 
     The mounting bracket lock may be configured to be easily operated into the locked position, for instance during installation of the window treatment. For example, the mounting bracket lock may be configured for toolless operation. To illustrate, the mounting bracket lock may be operated into the locked position without the use of tools, such as a screwdriver or screws. In addition, the mounting bracket lock may be configured such that, if during assembly of a window treatment, the mounting bracket is not properly attached to the rail, the mounting bracket lock may not be operated fully into the locked position. This may bring attention to an installer, such that the installer may then ensure proper attachment of the mounting bracket to the rail. Further, the operation of the mounting bracket lock may be easily understood so that a user may be able to quickly recognize how to operate the mounting bracket lock, for example after a period of time has passed since installation of the window treatment or if the user did not install the window treatment. 
     The example mounting bracket lock may include a body that is configured to be mountable to the rail of the window treatment housing. The body may include a first portion that is configured to slidably attach to the rail, and a second portion that is configured to receive a portion of the rail and a portion of a corresponding mounting bracket of the window treatment housing, thereby securing the mounting bracket in a locked position relative to the rail. 
     The first portion of the body of the mounting bracket lock may define a cavity that is mountable over a first section of the rail. The first portion of the body may further define an abutment surface that is configured to slide along a second section of the rail. The first section of the rail may be a ridge that extends along the rail, and the second section of the rail may be a ledge that extends along the rail. In accordance with an example configuration of the mounting bracket lock, the first portion of the body may define resilient retention strap. The retention strap may have a beveled end that defines the abutment surface. The beveled end may be configured to slidably engage with the second section of the rail to retain the mounting bracket lock in a slidable configuration relative to the rail. In accordance with another example configuration of the mounting bracket lock, the first portion of the body may define a rear wall. The rear wall may include a retention tab that defines the abutment surface. The first portion of the body may further define a resilient retaining strap that may be configured to slidably engage with the first section of the rail to retain the mounting bracket lock in a slidable configuration relative to the rail. 
     The second portion of the body of the mounting bracket lock may define an opening that extends into the body toward the first portion. The opening may be open to the cavity of the first portion of the body, and may be configured to receive both a portion of the mounting bracket and a corresponding portion of the first section of the rail. 
     The body of the mounting bracket lock may define one or more projections that extend therefrom, and that may be configured to engage with the mounting bracket when the mounting bracket lock is in the locked position. For example, the second portion of the body may define a first projection that extends therefrom and that is configured to engage with a first surface of the mounting bracket, and may define a second projection that extends therefrom and that is configured to engage with a second surface of the mounting bracket. 
     The first and second projections may extend from the second portion in respective first and second directions that are different from each other. The first and second projections may be configured to be received between the first and second surfaces of the attachment member so at to generate a friction fit therebetween. For example, the first and second projections may together define a wedge shape that may generate a friction fit within a cavity defined by the attachment member of the housing bracket. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is an exploded view depicting components of an example battery-powered roller shade for use in an opening. 
         FIG.  2    is a perspective view depicting components of the example battery-powered roller shade depicted in  FIG.  1   , including a housing bracket, a rail, and an example mounting bracket lock that may be used to secure the housing bracket to the rail. 
         FIG.  3 A  is a perspective view of the example mounting bracket lock depicted in  FIG.  2   . 
         FIG.  3 B  is a top view of the example mounting bracket lock depicted in  FIG.  2   . 
         FIG.  3 C  is a right elevation view of the example mounting bracket lock depicted in  FIG.  2   . 
         FIG.  3 D  is a left elevation view of the example mounting bracket lock depicted in  FIG.  2   . 
         FIG.  3 E  is a rear elevation view of the example mounting bracket lock depicted in  FIG.  2   . 
         FIG.  4 A  is a perspective view of an assembly of the components illustrated in  FIG.  2   , with the housing bracket attached to the rail and the example mounting bracket lock in an unlocked position. 
         FIG.  4 B  is a perspective view of the assembly illustrated in  FIG.  4 A , with the example mounting bracket lock in a locked position. 
         FIG.  5    is a zoomed-in side elevation view of a portion of the assembly illustrated in  FIGS.  4 A and  4 B . 
         FIG.  6    is a section view of the assembly illustrated in  FIG.  5   , projected along a direction extending out of the page. 
         FIG.  7    is a perspective view depicting components of the example battery-powered roller shade depicted in  FIG.  1   , including the housing bracket, the rail, and another example mounting bracket lock that may be used to secure the housing bracket to the rail. 
         FIG.  8 A  is a perspective view of the example mounting bracket lock depicted in  FIG.  7   . 
         FIG.  8 B  is a top view of the example mounting bracket lock depicted in  FIG.  7   . 
         FIG.  8 C  is a right elevation view of the example mounting bracket lock depicted in  FIG.  7   . 
         FIG.  8 D  is a left elevation view of the example mounting bracket lock depicted in  FIG.  7   . 
         FIG.  8 E  is a rear elevation view of the example mounting bracket lock depicted in  FIG.  7   . 
         FIG.  9 A  is a perspective view of an assembly of the components illustrated in  FIG.  7   , with the housing bracket attached to the rail and the example mounting bracket lock in an unlocked position. 
         FIG.  9 B  is a perspective view of the assembly illustrated in  FIG.  9 A , with the example mounting bracket lock in a locked position. 
         FIG.  10    is a zoomed-in side elevation view of a portion of the assembly illustrated in  FIGS.  9 A and  9 B . 
         FIG.  11    is a section view of the assembly illustrated in  FIG.  10   , projected along a direction extending out of the page. 
     
    
    
     DETAILED DESCRIPTION 
       FIG.  1    depicts an example motorized window treatment, in the form of a motorized roller shade  100  that may be mounted in front of an opening to prevent sunlight from entering a space and/or to provide privacy. The motorized roller shade  100  may be mounted to a structure that is proximate to the opening, such as a window frame, a wall, or other structure. As shown, the motorized roller shade  100  includes a shade assembly  110 , a battery compartment  130 , and a housing  140  that may be configured to support the shade assembly  110  and the battery compartment  130 . The housing  140  may be configured as a mounting structure and/or a support structure for one or more components of the motorized roller shade  100 . 
     As shown, the housing  140  includes a rail  142 , a first housing bracket  160 , and a second housing bracket  180 . The first and second housing brackets  160 ,  180  may alternatively be referred to as mounting brackets. The illustrated rail  142  is elongate between a first end  141  and an opposed second end  143  along a longitudinal direction L. The rail  142 , the first housing bracket  160 , and the second housing bracket  180  may be configured to attach to one another in an assembled configuration. For example, the first housing bracket  160  may be configured to be attached to the first end  141  of the rail  142 , and the second housing bracket  180  may be configured to be attached to the second end  143  of the rail  142 . As shown, the first housing bracket  160  defines an attachment member  162  that is configured to engage the first end  141  of the rail  142 , and the second housing bracket  180  defines an attachment member  182  that is configured to engage the second end  143  of the rail  142 . 
     As depicted in  FIG.  2   , the attachment member  162  includes a rear wall  164  that extends out from the upper portion  161  of the first housing bracket  160  along the longitudinal direction L. The illustrated rear wall  164  extends along the transverse direction T from an upper end  165  of the attachment member  162  to a lower end  166  of the attachment member  162 . The illustrated attachment member  162  further includes an upper wall  168  that extends forward from the upper end  165  of the rear wall  164 . As shown, the upper wall  168  defines a first section  169  that extends from the upper end  165  of the rear wall  164  to a jog  170 , along a direction that inclines relative to the lateral direction A with increasing distance from the upper end  165  of the rear wall  164 . The illustrated upper wall  168  further defines a second section  171  that extends forward from the jog  170  along the lateral direction A. 
     The illustrated attachment member  162  further includes an intermediate wall  172  that extends forward from the rear wall  164 , and that is spaced downward from the upper wall  168  along the transverse direction T. As shown, the intermediate wall  172  extends from the rear wall  164  to a free end  173 , along a direction that inclines relative to the lateral direction A with increasing distance from the rear wall  164 , such that the intermediate wall  172  is substantially parallel to the upper wall  168 . As shown, the free end  173  is located rearward from the jog  170  of the upper wall  168 . In this regard, the intermediate wall  172  may be shorter than the upper wall  168 , for instance relative to the rear wall  164 . The intermediate wall  172  may define a lip  174  at the free end  173  that extends upward from the free end  173 , along a direction that is substantially perpendicular to the intermediate wall  172 . As shown, the lip  174  may define a sloped upper surface  175  that declines away from the upper portion  161  of the first housing bracket  160 . 
     The illustrated attachment member  162  defines a cavity  176  at the upper end  165  that is partially bounded by the upper wall  168 , a portion of the rear wall  164 , and the intermediate wall  172 . The first section  169  of the upper wall  168  defines an inner surface  177  that faces into the cavity  176 , and the intermediate wall  172  defines an inner surface  179  that faces into the cavity  176 . As shown, the attachment member  162  further includes an edge  178  that protrudes from the lower end  166 . 
     It should be appreciated that, although not shown in detail, the attachment member  182  of the second housing bracket  180  may be configured with similar features to those of the attachment member  162  of the first housing bracket  160 . For example, the attachment member  182  of the second housing bracket  180  may be configured as a mirror image of the first attachment member  162 , relative to a plane defined by the lateral direction A and the transverse direction T. It should further be appreciated that the rail  142 , the first housing bracket  160 , and the second housing bracket  180  are not limited to the attachment members illustrated and described herein. 
     One or more of the rail  142 , the first housing bracket  160 , or the second housing bracket  180 , may be sized for mounting to a structure. For example, the rail  142  may be sized such that, with the first and second housing brackets  160 ,  180  attached to the rail  142 , the rail  142  may be mounted to a structure in an opening (e.g., to a window frame). In such an example configuration, the rail  142  may define a length, for example as defined by the first and second ends  141 ,  143 , such that the housing  140  may fit snugly in a window frame (e.g., with little clearance between the first and second housing brackets  160 ,  180  and adjacent structure of a window frame). This configuration may be referred to as an internal mount configuration. In another example, the rail  142  may be sized such that, with the first and second housing brackets  160 ,  180  attached to the rail  142 , the rail  142  may be mounted to a structure above an opening (e.g., to a surface above a window). In such an example configuration, the rail  142  may define a length that is substantially equal to (e.g., slightly longer than) a width of the window opening. In still another example, one or more of the rail  142 , the first housing bracket  160 , or the second housing bracket  180  may be sized such that the motorized roller shade  100  may be mounted within a cavity defined by a window treatment pocket that may be mounted to a structure, such as structure surrounding a window. It should be appreciated, however, that the motorized roller shade  100  is not limited to these example mounting configurations. 
     The rail  142  may define any suitable shape. The illustrated rail  142  includes a rear wall  144  that extends from an upper end  145  to an opposed lower end  147 , and includes an upper wall  146  that extends from the upper end  145 . As shown, the rear wall  144  extends along a transverse direction T that is perpendicular to the longitudinal direction L. The upper wall  146  extends outward from the upper end  145  of the rear wall  144  to a free end  148 , along a lateral direction A that is perpendicular to the longitudinal direction L and the transverse direction T. The free end  148  of the upper wall  146  may have a wedge-shaped cross-section that defines a ridge  149  that faces the rear wall  144 . 
     The illustrated rail  142  further includes a lower wall  150  that extends outward from the rear wall  144  along the lateral direction A. As shown, the lower wall  150  is spaced from the lower end  147  of the rear wall  144 , and is located nearer the lower end  147  than the upper end  145 . The lower wall  150  may define a ridge  152  that faces the rear wall  144 . The rear wall  144  may define a ledge  154  that extends outward from the rear wall  144  along the lateral direction A. 
     The first housing bracket  160  may be configured to be attached to the rail  142 . For example, as shown, the attachment member  162  is configured to be snapped into place relative to the rail  142 . In accordance with an example of attaching the first housing bracket  160  to the rail  142 , the edge  178  of the attachment member  162  may be seated behind the ridge  152  of the lower wall  150  of the rail  142 . The first housing bracket  160  may then be pivoted about the ridge  152 , such that the upper end  165  of the attachment member  162  moves toward the upper end  145  of the rear wall  144  of the rail  142 . As the first housing bracket  160  pivots toward an attached position relative to the rail  142 , the upper end  165  of the attachment member  162  may pass under the ledge  154  of the rear wall  144 , and the jog  170  may make contact with the free end  148  of the upper wall  146 . As the first housing bracket  160  moves into the attached position, the jog  170  may snap into place behind the ridge  149  of the upper wall  146 . 
     One or both of the rear wall  144  and the upper wall  146  may be configured to be mounted to a structure. For example, one or both of the rear wall  144  and the upper wall  146  may define one or more respective apertures (not shown) that are configured to receive fasteners (e.g., screws, lag bolts, etc.). 
     The rail  142 , the first housing bracket  160 , and the second housing bracket  180 , when in an assembled configuration, may define a cavity. The shade assembly  110  and the battery compartment  130  may be disposed in the cavity, for example when the motorized roller shade  100  is in an assembled configuration. When the motorized roller shade  100  is in an assembled configuration, the housing  140  may be open at the front and bottom, such that the shade assembly  110  and the battery compartment  130  are exposed. The motorized roller shade  100  may optionally include a fascia (not shown) that is configured to conceal one or more components of the motorized roller shade  100 , such as the battery compartment  130  and portions of the shade assembly  110 . 
     As shown, the shade assembly  110  includes a roller tube  112 , a motor drive unit  118 , an idler  120 , a covering material  122  (e.g., a shade fabric), and a hembar  126 . The roller tube  112  may have a tube body  114  that is elongate along the longitudinal direction L from a first end  113  to an opposed second end  115 . The tube body  114  may define any shape, such as the illustrated cylindrical shape. As shown, the roller tube  112  is hollow, and open at the first and second ends  113 ,  115 . The roller tube  112  may be configured to at least partially receive the motor drive unit  118 , and to at least partially receive the idler  120 . As shown, the roller tube  112  is configured such that a portion of the motor drive unit  118  may be disposed in the first end  113 , and such that a portion of the idler  120  may be disposed in the second end  115 . 
     The tube body  114  may define an inner surface  116  that is configured to operatively engage with the motor drive unit  118 . For example, as shown, the tube body  114  defines a plurality of splines  117  that extend radially inward from the inner surface  116 . The roller tube  112  may be configured to operatively engage with the motor drive unit  118  via the plurality of splines  117 . For example, the splines  117  may be configured to operatively engage with a component of the motor drive unit  118 , such that rotational torque may be transferred to the roller tube  112  from the motor drive unit  118 , thereby causing the roller tube  112  to rotate about an axis of rotation AR. The axis of rotation AR of the roller tube  112  may also be referred to as a central axis of the roller tube  112 . 
     As shown, the splines  117  extend parallel to the longitudinal direction L, and are spaced apart from each other equally along a circumference of the inner surface  116  of the roller tube  112 . Each of the illustrated splines  117  extends from the first end  113  to the second end  115  of the tube body  114 . It should be appreciated that the roller tube  112  is not limited to illustrated configuration and/or geometry of splines  117 . It should further be appreciated that the roller tube  112  may be alternatively configured to operably engage with the motor drive unit  118 . For example, in accordance with an alternative configuration of the roller tube  112 , the tube body  114  may define a smooth inner surface  116 , and may define an opening that extends through the tube body  114  at a location such that the roller tube  112  may be operatively coupled to the motor drive unit  118  via one or more fasteners that may be disposed into the opening and that may engage the motor drive unit  118  (e.g., such as screws, pins, clips, or the like). 
     The illustrated motor drive unit  118  may be configured to be disposed into the first end  113  of the roller tube  112 . One or more components of the motor drive unit  118  may be configured to engage with the plurality of splines  117  of the roller tube  112 . As shown, the motor drive unit includes a drive hub  119  that defines a plurality of grooves that are configured to operably engage with corresponding ones of the splines  117 , such that operation of the motor drive unit  118  may cause the roller tube  112  to rotate. The motor drive unit  118  may further include an integrated idler  121  that defines a plurality of grooves that are configured to engage with corresponding ones of the splines  117 . The idler  120  may similarly define a plurality of grooves that are configured to engage with corresponding ones of the splines  117 . 
     The covering material  122  may define an upper end (not shown) that is configured to be operably attached to the roller tube  112 , and an opposed lower end  124  that is configured as a free end. Rotation of the roller tube  112  about the axis of rotation AR, for example rotation caused by the motor drive unit  118 , may cause the covering material  122  to wind onto, or to unwind from, the roller tube  112 . In this regard, the motor drive unit  118  may adjust the covering material  122 , for instance between raised and lowered positions of the covering material  122 . 
     Rotation of the roller tube  112  in a first direction about the axis of rotation AR may cause the covering material  122  to unwind from the roller tube  112 , for example as the covering material  122  is operated to a lowered position relative to an opening (e.g., a window). Rotation of the roller tube  112  in a second direction, about the axis or rotation AR, that is opposite the first direction may cause the covering material  122  to wind onto the roller tube  112 , for example as the covering material  122  is operated to a raised position relative to the opening. 
     The covering material  122  may be made of any suitable material, or combination of materials. For example, the covering material  122  may be made from one or more of “scrim,” woven cloth, non-woven material, light-control film, screen, or mesh. The hembar  126  may be attached to the lower end  124  of the covering material  122 , and may be weighted, such that the hembar  126  causes the covering material  122  to hang (e.g., vertically) in front of one or more windows. 
     The motor drive unit  118  may be configured to enable control of the rotation of the roller tube  112 , for example by a user of the motorized roller shade  100 . For example, a user of the motorized roller shade  100  may control the motor drive unit  118  such that the covering material  122  is moved to a desired position. The motor drive unit  118  may include a sensor that monitors a position of the roller tube  112 . This may enable the motor drive unit  118  to track a position of the covering material  122  relative to respective upper and lower limits of the covering material  122 . The upper and lower limits may be specified by an operator of the motorized roller shade  100 , and may correspond to the raised and lowered positions of the covering material  122 , respectively. 
     The motor drive unit  118  may be manually controlled (e.g., by actuating one or more buttons) and/or wirelessly controlled (e.g., using an infrared (IR) or radio frequency (RF) remote control unit). Examples of motor drive units for motorized roller shades are described in greater detail in U.S. Pat. No. 6,983,783, issued Jan. 10, 2006, entitled “Motorized Shade Control System,” U.S. Pat. No. 7,839,109, issued Nov. 23, 2010, entitled “Method Of Controlling A Motorized Window Treatment,” U.S. Pat. No. 8,950,461, issued Jan. 21, 2015, entitled “Motorized Window Treatment,” and U.S. Pat. No. 9,045,939, issued May 13, 2015, entitled “Battery-Powered Motorized Window Treatment Having A Service Position,” the entire contents of each of which are incorporated herein by reference. It should be appreciated, however, that any motor drive unit or drive system may be used to control the roller tube  112 . 
     The motorized roller shade  100  may include an antenna (not shown) that is configured to receive wireless signals (e.g., RF signals from a remote control device). The antenna may be in electrical communication with the motor drive unit  118  (e.g., via a control circuit or PCB), such that one or more wireless signals received from a remote control unit may cause the motor drive unit  118  to move the covering material  122  (e.g., between the lowered and raised positions). The antenna may be integrated with (e.g., pass through, be enclosed within, and/or be mounted to) one or more of the shade assembly  110 , the battery compartment  130 , the housing  140 , or respective components thereof. 
     The battery compartment  130  may be configured to retain one or more batteries  132 . The illustrated battery  132  may be, for example, a D cell (e.g., IEC R20) battery. One or more components of the motorized roller shade  100 , such as the motor drive unit  118 , may be powered by the one or more batteries  132 . However, it should be appreciated that the motorized roller shade  100  is not limited to the illustrated battery-powered configuration. For example, the motorized roller shade  100  may be alternatively configured such that one or more components thereof, such as the motor drive unit  118 , may be powered by an alternating current (AC) source, a direct current (DC) source, or any combination of power sources. 
     The battery compartment  130  may be configured to be operable between an opened position and a closed position, such that one or more batteries  132  may be accessible when the battery compartment  130  is in the opened position. Examples of battery compartments for motorized roller shades are described in greater detail in U.S. Patent Application Publication No. 2014/0305602, published Oct. 16, 2014, entitled “Integrated Accessible Battery Compartment For Motorized Window Treatment,” the entire contents of which is incorporated herein by reference. 
     The housing  140  may be configured to support one or both of the shade assembly  110  and the battery compartment  130 . For example, the first and second housing brackets  160 ,  180  may be configured to support the shade assembly  110  and/or the battery compartment  130 . As shown, the first and second housing brackets  160 ,  180  are configured to support the shade assembly  110  and the battery compartment  130  such that the battery compartment  130  is located (e.g., is oriented) above the shade assembly  110  when the motorized roller shade  100  is mounted to a structure. It should be appreciated that the motorized roller shade  100  is not limited to the illustrated orientation of the shade assembly  110  and the battery compartment  130 . For example, the housing  140  may be alternatively configured to otherwise support the shade assembly  110  and the battery compartment  130  relative to each other (e.g., such that the battery compartment  130  is located below the shade assembly  110 ). 
     As shown, the first housing bracket  160  defines an upper portion  161  and a lower portion  163 , and the second housing bracket  180  defines an upper portion  181  and a lower portion  183 . The upper portion  161  of the first housing bracket  160  may be configured to support a first end of the battery compartment  130 , and the upper portion  181  of the second housing bracket  180  may be configured to support a second end of the battery compartment  130 . The upper portions  161 ,  181  of the first and second housing brackets  160 ,  180 , respectively, may be configured to operably support the battery compartment  130 , such that the battery compartment  130  is operable to provide access to one or more batteries  132  when the motorized roller shade  100  is mounted to a structure. 
     The lower portion  163  of the first housing bracket  160  may be configured to support the idler  121 , and thus the first end  113  of the tube body  114  of the roller tube  112 . The lower portion  183  of the second housing bracket  180  may be configured to support the idler  120 , and thus the second end  115  of the tube body  114  of the roller tube  112 . The lower portions  163 ,  183  of the first and second housing brackets  160 ,  180 , respectively, may be configured to operably support the support the shade assembly  110 , such that the covering material  122  may be moved (e.g., between the lowered and raised positions). 
     The housing  140  may be configured to be mounted to a structure using one or more fasteners (e.g., one or more screws). For example, one or more of the rail  142 , the first housing bracket  160 , or the second housing bracket  180  may define one or more respective apertures that are configured to receive fasteners. 
     The components of the housing  140  may be made of any suitable material or combination of materials. For example, the rail  142  may be made of metal, and the first and second housing brackets  160 ,  180  may be made of plastic. Although the illustrated housing  140  includes a one piece rail  142  it should be appreciated that the rail may include first and second rail sections that may be configured to attach to one another. One or more components of the housing  140  (e.g., one or more of the rail  142 , the first housing bracket  160 , or the second housing bracket  180 ) may be wrapped in a material (e.g., fabric), for instance to enhance the aesthetics of the housing  140 . 
       FIG.  2    depicts components of the housing  140  of the motorized roller shade  100 , including the first attachment member  162  and the rail  142 . For the sake of clarity, only a portion of the rail proximate to the first end  141  is shown.  FIG.  2    further depicts an example mounting bracket lock  200  that is attachable to the motorized roller shade  100 , and that may operate to secure the first attachment member  162  to the first end  141  of the rail  142 . In this regard, the mounting bracket lock  200  may be a component of the motorized roller shade  100 . 
     Referring additionally to  FIGS.  3 A- 3 E , the example mounting bracket lock  200  includes a body  202  that is mountable to the rail  142  of the motorized roller shade  100 . As shown, the body  202  defines a front wall  204  that is elongate from a first end  206  to an opposed second end  208 , and that extends along the longitudinal direction L. 
     The mounting bracket lock  200  may be configured to be operatively coupled to the rail  142 . For example, when the mounting bracket lock  200  is attached to the rail  142 , the mounting bracket lock  200  may be slidable along the rail  142  (e.g., along the longitudinal direction L). As shown, the body  202  of the mounting bracket lock  200  may define a cavity  210  that extends into the second end  208  and through a first portion  212  of the body  202 , along the longitudinal direction L. The cavity  210  may be sized to be disposed onto the free end  148  of the upper wall  146  of the rail  142 , such that the mounting bracket lock  200  is slidable along the rail  142 , for example toward or away from the first housing bracket  160 . In this regard, the first portion  212  of the body  202  of the mounting bracket lock  200  may be configured to slidably attach to the rail  142 . 
     The mounting bracket lock  200  may be configured to be retained in slidable attachment along the rail  142 . For example, as shown, the body  202  of the mounting bracket lock  200  may define a retaining wall  211  that extends upward from the body  202  near a rear of the cavity  210 . The illustrated retaining wall  211  extends along the first portion  212  of the body  202 . When the mounting bracket lock  200  is attached to the rail  142 , the cavity  210  may be disposed over the free end  148  of the rail  142 , and the mounting bracket lock  200  may be pivoted about the free end  148 , toward the upper wall  146  and the rear wall  144 , until the retaining wall  211  snaps into place behind the ridge  149  of the upper wall  146 . The cavity  210  and the retaining wall  211  may cooperate to retain the mounting bracket lock  200  in a slidably attached position on the rail  142 . The free end  148  of the rail  142  (e.g., including the ridge  149 ) may be referred to as a first section of the rail  142 , for example relative to the mounting bracket lock  200 . In this regard, the cavity  210  is mountable over the first section of the rail  142 . 
     In accordance with the illustrated example of the mounting bracket lock  200 , the body  202  may further define a resilient retention strap  214  that is configured to slidably engage with the rail  142 , and that may operate to retain the mounting bracket lock  200  in a slidable configuration relative to the rail  142 . As shown, the first portion  212  of the body  202  may define a rear wall  216  that extends rearward from the front wall  204  to a free end  218 , along the lateral direction A. As shown, the retention strap  214  may be defined at the free end  218  of the rear wall  216 . The illustrated retention strap  214  has a “U” shaped profile that extends from the free end  218  of the rear wall  216  to a beveled end  220  that is spaced rearward along the lateral direction A and upward along the transverse direction T from the free end  218  of the rear wall  216 . As shown, the beveled end  220  may define an abutment surface  222  that may be parallel to the rear wall  216 . 
     In accordance with an example process of slidably attaching the mounting bracket lock  200  to the rail  142 , the cavity  210  of the first portion  212  of the body  202  may be disposed onto (e.g., snapped into place over) the free end  148  of the upper wall  146  of the rail  142 . The beveled end  220  of the retention strap  214  may then be pivoted toward the upper end  145  of the rear wall  144  of the rail  142 , and may make contact with the ledge  154  of the rear wall  144 . Contact between the beveled end  220  and the ledge  154  may cause the beveled end  220  to deflect forward toward the free end  218  of the rear wall  216  of the body  202 , until the beveled end  220  passes beyond the ledge  154 , at which point the retention strap  214  may resiliently return to a rest state, with the abutment surface  222  abutting an upper surface of the ledge  154  (e.g., as shown in  FIG.  5   ). During operation of the mounting bracket lock  200 , the abutment surface  222  may slide along the ledge  154 . The ledge  154  may be referred to as a second section of the rail  142 . In this regard, the abutment surface  222 , and more generally the retention strap  214 , may slide along the second section of the rail  142  and may slidably engage with the second section of the rail  142  to retain the mounting bracket lock  200  in a slidable configuration relative to the rail  142 . 
     The example mounting bracket lock  200  may be configured to releasably engage with a portion of the attachment member  162  of the first housing bracket  160 , in order to prevent the first housing bracket  160  from detaching from the rail  142 . For example, as shown, the body  202  of the mounting bracket lock  200  may define an opening  224  that extends into the first end  206  and through a second portion  226  of the body  202 , toward the first portion  212 , along the longitudinal direction L. 
     The opening  224  may be open to the cavity  210  and may be configured to receive a corresponding portion of the free end  148  of the rail  142 , and to further receive a portion of the attachment member  162  of the first housing bracket  160  when the mounting bracket lock  200  is in a locked position relative to the first housing bracket  160  (e.g., as shown in  FIG.  6   ). For example, as shown, the opening  224  may be configured to receive a portion of the second section  171  of the upper wall  168  of the attachment member  162 . In this regard, the opening  224  of the second portion  226  of the body  202  may define a cross section that is larger than a cross section of the cavity  210  of the first portion  212 . The second portion  226  of the body  202  may define a length L 1  along the longitudinal direction L that is substantially equal to a length L 2  of the upper wall  168  of the attachment member  162  along the longitudinal direction L. 
     The body  202  of the mounting bracket lock  200  may be configured to engage with the attachment member  162  of the first housing bracket  160  when the mounting bracket lock  200  is operated to the locked position. For example, the body  202  may define one or more projections that extend from the body  202  and that may be configured to engage with corresponding portions of the attachment member  162  of the first housing bracket  160  when the mounting bracket lock  200  is operated to the locked position. 
     As shown, the second portion  226  of the body  202  may define a projection  228  that extends downward from a lower surface  230  of the second portion  226  of the body  202 . The projection  228  may be referred to as a first projection  228 . The first projection  228  may be elongate along the longitudinal direction L, along the length L 1  of the second portion  226 , and may define a lower surface  232  that is sloped upward relative to the longitudinal direction L with increasing distance from the first portion  212  toward the first end  206  of the body  202  (e.g., as shown in  FIGS.  3 A and  3 E ). As shown, the lower surface  232  may additionally be sloped along a direction that declines, relative to the lateral direction A, with increasing distance from the front wall  204  (e.g., as shown in  FIGS.  3 C and  3 D ), and that may extend parallel to the inner surface  179  of the intermediate wall  172  of the attachment member  162 . 
     The second portion  226  of the body  202  may define a projection  234  that extends downward from the lower surface  230  of the second portion  226  of the body  202 . The projection  234  may be referred to as a second projection  234 . The second projection  234  may be elongate along the longitudinal direction L, along the length L 1  of the second portion  226 , and may define a lower surface  236  that is sloped upward relative to the longitudinal direction L with increasing distance from the first portion  212  toward the first end  206  of the body  202  (e.g., as shown in  FIG.  3 A ). As shown, the lower surface  236  may additionally be sloped along a direction that declines relative to the lateral direction A with increasing distance from the front wall  204  (e.g., as shown in  FIGS.  3 C and  3 D ), and that may extend parallel to the upper surface  175  of the lip  174  of the intermediate wall  172  of the attachment member  162 . In accordance with the illustrated mounting bracket lock  200 , the second projection  234  may extend downward from the lower surface  230  of the second portion  226  through a distance that is shorter than that through which the first projection  228  extends downward from the lower surface  230 . 
     The second portion  226  of the body  202  may define a projection  238  that extends upward relative to the lower surface  230  of the second portion  226  of the body  202 . The projection  238  may be referred to as a third projection  238 . The third projection  238  may be elongate along the longitudinal direction L, along the length L 1  of the second portion  226 , and may define an upper surface  240  that is sloped downward relative to the longitudinal direction L with increasing distance from the first portion  212  toward the first end  206  of the body  202  (e.g., as shown in  FIG.  3 E ). As shown, the upper surface  240  may additionally be sloped along a direction that declines relative to the lateral direction A with increasing distance from the front wall  204  (e.g., as shown in  FIGS.  3 C and  3 D ), and that may extend parallel to the inner surface  177  of the first section  169  of the upper wall  168  of the attachment member  162 . 
     As shown in  FIG.  3 E , in accordance with the sloped lower surface  232  of the first projection  228  and the sloped upper surface  240  of the third projection  238 , the second portion  226  of the body  202  may taper with increasing distance from the first portion  212  toward the first end  206  of the body  202 , such that the second portion  226  of the body  202  may define a wedge shaped profile. In this regard, the first projection  228  and the third projection  238  may together define a wedge shape that may be configured to generate a friction fit when disposed into a corresponding portion of the attachment member  162  of the first housing bracket  160 , for instance within the cavity  176 . 
     The mounting bracket lock  200  may be configured to assist a user thereof, for example in accordance with assembly of a window treatment that includes the mounting bracket block  200  (e.g., the motorized roller shade  100 ), and/or in accordance with subsequent maintenance of such a window treatment. For example, as shown, the first portion  212  of the body defines an arc shaped groove  242  that extends into a front surface  244  of the front wall  204 . The groove  242  may be configured to receive a finger or thumb, for example, of a user of the mounting bracket lock  200 , and may apply a surface upon which force may be applied by the user to cause the mounting bracket lock  200  to slide along the rail  142 . In this regard, the mounting bracket lock  200  may be operated between the locked and unlocked positions without the use of tools. 
     The mounting bracket lock  200  may include one or more indicia  246  that are related to operation thereof. For example, as shown, the second portion  226  of the body  202  defines indicia  246  in the form of a directional arrow and an image of a lock that are recessed into the front surface  244  of the front wall  204 , and that indicate that the mounting bracket lock  200  may be slid along the rail  142  toward the first end  141  of the rail  142  to operate the mounting bracket lock  200  into a locked position relative to the first housing bracket  160 . In this regard, the mounting bracket lock  200  may be self-teaching with regard to its operation, for instance such that prior instruction may not be needed to understand operation of the mounting bracket lock  200 . 
       FIGS.  4 A and  4 B  depict an example of operation of the mounting bracket lock  200  from an unlocked position to a locked position.  FIG.  4 A  depicts a partial assembly of components of the housing  140  of the motorized roller shade  100 , in which the attachment member  162  of the first housing bracket  160  is attached to the first end  141  of the rail  142 , for example as described herein. The mounting bracket lock  200  is slidably attached to the rail  142 , and is in an unlocked position in which the mounting bracket lock  200  is spaced from the attachment member  162 . With the mounting bracket lock  200  in the unlocked position, the first housing bracket  160  may be detached from the rail  142 . The mounting bracket lock  200  may be operated to a locked position by causing the mounting bracket lock  200  to slide toward the first end  141  of the rail  142 , for example by applying pressure to the groove  242 . As the mounting bracket lock  200  moves into the locked position, the opening  224  may receive the second section  171  of the upper wall  168  of the attachment member  162 , thereby securing the first housing bracket  160  in position relative to the rail  142 , such that the first housing bracket  160  is prevented from becoming detached from the rail  142 . In this regard, the mounting bracket lock  200  may be secured in place in the locked position without the use of external fasteners (e.g., screws). The mounting bracket lock  200  may be configured such that if the attachment member  162  (e.g., the second section  171  of the upper wall  168 ) is not in a fully attached position relative to the rail  142 , the mounting bracket lock  200  will not slide into the locked position, for example via the dimensions and/or tolerances with which the opening  224  is configured. 
     Additionally, as the mounting bracket lock  200  moves into the locked position the second portion  226  of the body  202  may be received in the cavity  176  of the attachment member  162 . The second portion  226  may generate a friction fit within the cavity  176 , which may secure the mounting bracket lock  200  in position relative to the first housing bracket  160 . More specifically, the lower surface  232  of the first projection  228  may abut (e.g., engage with) the inner surface  179  of the intermediate wall  172  of the attachment member  162 , and the upper surface  240  of the third projection  238  may abut (e.g., engage with) the inner surface  177  of the first section  169  of the upper wall  168  of the attachment member  162 . The wedge shape of the second portion  226  may cause the lower surface  232  of the first projection  228  and the upper surface  240  of the third projection  238  to apply friction forces against inner surfaces  179 ,  177 , respectively, of the cavity  176 . 
     Furthermore, as the mounting bracket lock  200  moves into the locked position, the lower surface  236  of the second projection  234  may abut (e.g., engage with) the upper surface  175  of the lip  174  of the attachment member  162 . Friction force applied by the lower surface  236  of the second projection  234  against the upper surface  175  of the lip  174  may contribute to securement of the first housing bracket  160  in position relative to the rail  142 . 
     In an example operation of removing the first housing bracket  160  from the rail  142 , the mounting bracket lock  200  may be operated to an unlocked position (e.g., as shown in  FIG.  4 A ) by causing the mounting bracket lock  200  to slide away from the first end  141  of the rail  142 , for instance by applying pressure to the groove  242 . With the mounting bracket lock  200  in an unlocked position, the first housing bracket  160  may be detached from the rail  142 . For example, downward pressure may be applied to the second section  171  of upper wall  168  of the attachment member  162 , thereby causing the jog  170  to slip past the ridge  149  of the upper wall  146  of the rail  142 . The upper end  165  of the attachment member  162  may then be pivoted downward and away from the upper end  145  of the rear wall  144 . As the attachment member  162  pivots forward from the rear wall  144 , the edge  178  may become unseated from the ridge  152  of the lower wall  150  of the rail  142 , such that the first housing bracket  160  may then be removed from the rail  142 . 
     It should be appreciated that the mounting bracket lock  200  is not limited to the example configuration illustrated and described herein. For example, the mounting bracket lock  200  may be alternatively provided in a configuration that is mirrored relative to the illustrated mounting bracket lock  200  (e.g., reflected in a plane defined by the transverse direction T and the lateral direction A). Such an alternate configuration of the mounting bracket lock  200  may be used, for example, to secure the second housing bracket  180  to the second end  143  of the rail  142 . Moreover, the mounting bracket lock  200  may be alternatively configured with more, fewer, or different projections that extend from the first and/or second portions  212 ,  226  of the body  202 . In accordance with such alternate configurations, the projections  228 ,  234 , and  238  may be referred to as other than the first, second, and third projections, respectively. 
     It should further be appreciated one or more mounting bracket locks  200  may be provided with other components of the housing of a window treatment, such as the first and second housing brackets  160 ,  180 , and the rail  142 . In this regard, the mounting bracket lock  200  may be a component of a window treatment housing (e.g., the housing  140 ), and more generally may be a component of a window treatment (e.g., the motorized roller shade  100 ). It should further still be appreciated that one or more mounting bracket locks  200  may be provided with a window treatment kit, or may be provided separately, for example in accordance with a retrofit installation of the mounting bracket locks  200 . It should further still be appreciated that the example mounting bracket lock  200  is not limited to use with the housing of a roller shade window treatment, such as the motorized roller shade  100 . For example, the mounting bracket lock  200  may be adapted for use with the respective housings of other types of window treatments, such as roman shades, venetian blinds, draperies, and so on. 
       FIG.  7    depicts components of the housing  140  of the motorized roller shade  100 , including the first attachment member  162  and the rail  142 . For the sake of clarity, only a portion of the rail proximate to the first end  141  is shown.  FIG.  7    further depicts another example mounting bracket lock  300  that is attachable to the motorized roller shade  100 , and that may operate to secure the first attachment member  162  to the first end  141  of the rail  142 . In this regard, the mounting bracket lock  300  may be a component of the motorized roller shade  100 . 
     Referring additionally to  FIGS.  8 A- 8 E , the example mounting bracket lock  300  includes a body  302  that is mountable to the rail  142  of the motorized roller shade  100 . As shown, the body  302  defines a front wall  304  that is elongate from a first end  306  to an opposed second end  308 , and that extends along the longitudinal direction L. 
     The mounting bracket lock  300  may be configured to be operatively coupled to the rail  142 . For example, when the mounting bracket lock  300  is attached to the rail  142 , the mounting bracket lock  300  may be slidable along the rail  142  (e.g., along the longitudinal direction L). As shown, the body  302  of the mounting bracket lock  300  may define a cavity  310  that extends into the second end  308  and through a first portion  312  of the body  302 , along the longitudinal direction L. The cavity  310  may be sized to be disposed onto the free end  148  of the upper wall  146  of the rail  142 , such that the mounting bracket lock  300  is slidable along the rail  142 , for example toward or away from the first housing bracket  160 . In this regard, the first portion  312  of the body  302  of the mounting bracket lock  300  may be configured to slidably attach to the rail  142 . 
     In accordance with the illustrated example of the mounting bracket lock  300 , the body  302  may further define a retention tab  314  that is configured to slidably engage with the rail  142 , and that may operate to retain the mounting bracket lock  300  in a slidable configuration relative to the rail  142 . As shown, the first portion  312  of the body  302  may define a rear wall  316  that extends rearward from the front wall  304  to a free end  318 , along the lateral direction A. As shown, the retention tab  314  may be defined at the free end  318  of the rear wall  316 . The illustrated retention tab  314  is spaced rearward along the lateral direction A and upward along the transverse direction T from the free end  318  of the rear wall  316 . As shown, the retention tab  314  may define an abutment surface  320  that may be parallel to the rear wall  316 . 
     The mounting bracket lock  300  may be configured to be retained in slidable attachment along the rail  142 . For example, as shown, the body  302  of the mounting bracket lock  300  may define a resilient retaining strap  311  that extends from the free end  318  of the rear wall  316 . The retaining strap  311  may define a fixed end  313  that is located proximate the free end  318  of the rear wall  316 , and a free end  315  that is spaced from the fixed end  313 . As shown, the retaining strap  311  may be angularly offset relative to the rear wall  316 , such that the retaining strap  311  slopes upward along the transverse direction T and forward along the lateral direction A from the fixed end  313 . The body  302  may define an opening  317  that is configured to receive at least a portion of the retaining strap  311  when the free end  315  of the retaining strap  311  is deflected toward the rear wall  316 . As shown, the opening  317  may extend through the rear wall  316  and may be sized slightly larger than the retaining strap  311 , such that when the retaining strap  311  is pivotally deflected about the fixed end  313 , the retaining strap  311  may be received in the opening  317 . 
     When the mounting bracket lock  300  is attached to the rail  142 , the cavity  310  may be disposed over the free end  148  of the rail  142 . As the cavity  310  is disposed over the free end  148  of the rail  142 , the free end  315  of the retaining strap  311  may abut the free end  148 , such that the retaining strap deflects towards and at least partially into the opening  317 . As the mounting bracket lock  300  moves into a slidably attached position on the free end  148  of the rail  142 , the free end  315  of the retaining strap  311  may snap into place behind the ridge  149  of the upper wall  146 . The cavity  310  and the retaining strap  311  may cooperate to retain the mounting bracket lock  300  in a slidably attached position on the rail  142 . For example, the free end  315  of the retaining strap  311  may slidably engage with the free end  148  of the rail  142 , for example as the mounting bracket lock  300  is moved along the rail  142 , to retain the mounting bracket lock  300  in a slidable configuration relative to the rail  142 . The free end  148  of the rail  142  (e.g., including the ridge  149 ) may be referred to as a first section of the rail  142 , for example relative to the mounting bracket lock  300 . In this regard, the cavity  310  is mountable over the first section of the rail  142 , and the retaining strap  311  may be configured to slidably engage with the first section of the rail  142  to retain the mounting bracket lock  300  in a slidable configuration relative to the rail  142 . 
     In accordance with an example process of slidably attaching the mounting bracket lock  300  to the rail  142 , the abutment surface  320  of the retention tab  314  may be placed onto an upper surface of the ledge  154  of the rear wall  144 . The mounting bracket lock  300  may then be pivoted upward toward the upper wall  146 , such that the cavity  310  of the first portion  312  of the body  302  is disposed onto the free end  148  of the upper wall  146 . As the free end  315  of the retaining strap  311  moves past the ridge  149  of the upper wall  146 , the free end  315  may snap into place behind the ridge  149 , at which point the retaining strap  311  may resiliently return to a rest state (e.g., as shown in  FIG.  10   ). During operation of the mounting bracket lock  300 , the abutment surface  320  of the retention tab  314  may slide along the ledge  154 . The ledge  154  may be referred to as a second section of the rail  142 . In this regard, the abutment surface  320 , and more generally the retention tab  314 , may slide along the second section of the rail  142 . 
     The example mounting bracket lock  300  may be configured to releasably engage with a portion of the attachment member  162  of the first housing bracket  160 , in order to prevent the first housing bracket  160  from detaching from the rail  142 . For example, as shown, the body  302  of the mounting bracket lock  300  may define an opening  324  that extends into the first end  306  and through a second portion  326  of the body  302 , toward the first portion  312 , along the longitudinal direction L. 
     The opening  324  may be open to the cavity  310  and may be configured to receive a corresponding portion of the free end  148  of the rail  142 , and to further receive a portion of the attachment member  162  of the first housing bracket  160  when the mounting bracket lock  300  is in a locked position relative to the first housing bracket  160  (e.g., as shown in  FIG.  11   ). For example, as shown, the opening  324  may be configured to receive a portion of the second section  171  of the upper wall  168  of the attachment member  162 . In this regard, the opening  324  of the second portion  326  of the body  302  may define a cross section that is larger than a cross section of the cavity  310  of the first portion  312 . The second portion  326  of the body  302  may define a length L 3  along the longitudinal direction L that is substantially equal to the length L 2  of the upper wall  168  of the attachment member  162  along the longitudinal direction L. 
     The body  302  of the mounting bracket lock  300  may be configured to engage with the attachment member  162  of the first housing bracket  160  when the mounting bracket lock  300  is operated to the locked position. For example, the body  302  may define one or more projections that extend from the body  302  and that may be configured to engage with corresponding portions of the attachment member  162  of the first housing bracket  160  when the mounting bracket lock  300  is operated to the locked position. 
     As shown, the second portion  326  of the body  302  may define a projection  328  that extends downward from a lower surface  330  of the second portion  326  of the body  302 . The projection  328  may be referred to as a first projection  328 . The first projection  328  may be elongate along the longitudinal direction L, along the length L 1  of the second portion  326 , and may define a lower surface  332  that is sloped upward relative to the longitudinal direction L with increasing distance from the first portion  312  toward the first end  306  of the body  302  (e.g., as shown in  FIGS.  8 A and  8 E ). As shown, the lower surface  332  may additionally be sloped along a direction that declines, relative to the lateral direction A, with increasing distance from the front wall  304  (e.g., as shown in  FIGS.  8 C and  8 D ), and that may extend parallel to the inner surface  179  of the intermediate wall  172  of the attachment member  162 . 
     The second portion  326  of the body  302  may define a projection  334  that extends downward from the lower surface  330  of the second portion  326  of the body  302 . The projection  334  may be referred to as a second projection  334 . The second projection  334  may be elongate along the longitudinal direction L, along the length L 1  of the second portion  326 , and may define a lower surface  336  that is sloped upward relative to the longitudinal direction L with increasing distance from the first portion  312  toward the first end  306  of the body  302  (e.g., as shown in  FIG.  8 A ). As shown, the lower surface  336  may additionally be sloped along a direction that declines relative to the lateral direction A with increasing distance from the front wall  304  (e.g., as shown in  FIGS.  8 C and  8 D ), and that may extend parallel to the upper surface  175  of the lip  174  of the intermediate wall  172  of the attachment member  162 . In accordance with the illustrated mounting bracket lock  300 , the second projection  334  may extend downward from the lower surface  330  of the second portion  326  through a distance that is shorter than that through which the first projection  328  extends downward from the lower surface  330 . 
     The second portion  326  of the body  302  may define a projection  338  that extends upward relative to the lower surface  330  of the second portion  326  of the body  302 . The projection  338  may be referred to as a third projection  338 . The third projection  338  may be elongate along the longitudinal direction L, along the length L 1  of the second portion  326 , and may define an upper surface  340  that is sloped downward relative to the longitudinal direction L with increasing distance from the first portion  312  toward the first end  306  of the body  302  (e.g., as shown in  FIG.  8 E ). As shown, the upper surface  340  may additionally be sloped along a direction that declines relative to the lateral direction A with increasing distance from the front wall  304  (e.g., as shown in  FIG.  8 D ), and that may extend parallel to the inner surface  177  of the first section  169  of the upper wall  168  of the attachment member  162 . 
     As shown in  FIG.  8 E , in accordance with the sloped lower surface  332  of the first projection  328  and the sloped upper surface  340  of the third projection  338 , the second portion  326  of the body  302  may taper with increasing distance from the first portion  312  toward the first end  306  of the body  302 , such that the second portion  326  of the body  302  may define a wedge shaped profile. In this regard, the first projection  328  and the third projection  338  may together define a wedge shape that may be configured to generate a friction fit when disposed into a corresponding portion of the attachment member  162  of the first housing bracket  160 , for instance within the cavity  176 . 
     The mounting bracket lock  300  may be configured to assist a user thereof, for example in accordance with assembly of a window treatment that includes the mounting bracket block  300  (e.g., the motorized roller shade  100 ), and/or in accordance with subsequent maintenance of such a window treatment. For example, as shown, the first portion  312  of the body defines an arc shaped groove  342  that extends into a front surface  344  of the front wall  304 . The groove  342  may be configured to receive a finger or thumb, for example, of a user of the mounting bracket lock  300 , and may apply a surface upon which force may be applied by the user to cause the mounting bracket lock  300  to slide along the rail  142 . In this regard, the mounting bracket lock  300  may be operated between the locked and unlocked positions without the use of tools. 
     The mounting bracket lock  300  may include one or more indicia  346  that are related to operation thereof. For example, as shown, the second portion  326  of the body  302  defines indicia  346  in the form of a directional arrow and an image of a lock that are recessed into the front surface  344  of the front wall  304 , and that indicate that the mounting bracket lock  300  may be slid along the rail  142  toward the first end  141  of the rail  142  to operate the mounting bracket lock  300  into a locked position relative to the first housing bracket  160 . In this regard, the mounting bracket lock  300  may be self-teaching with regard to its operation, for instance such that prior instruction may not be needed to understand operation of the mounting bracket lock  300 . 
       FIGS.  9 A and  9 B  depict an example of operation of the mounting bracket lock  300  from an unlocked position to a locked position.  FIG.  9 A  depicts a partial assembly of components of the housing  140  of the motorized roller shade  100 , in which the attachment member  162  of the first housing bracket  160  is attached to the first end  141  of the rail  142 , for example as described herein. The mounting bracket lock  300  is slidably attached to the rail  142 , and is in an unlocked position in which the mounting bracket lock  300  is spaced from the attachment member  162 . With the mounting bracket lock  300  in the unlocked position, the first housing bracket  160  may be detached from the rail  142 . The mounting bracket lock  300  may be operated to a locked position by causing the mounting bracket lock  300  to slide toward the first end  141  of the rail  142 , for example by applying pressure to the groove  342 . As the mounting bracket lock  300  moves into the locked position, the opening  324  may receive the second section  171  of the upper wall  168  of the attachment member  162 , thereby securing the first housing bracket  160  in position relative to the rail  142 , such that the first housing bracket  160  is prevented from becoming detached from the rail  142 . In this regard, the mounting bracket lock  300  may be secured in place in the locked position without the use of external fasteners (e.g., screws). The mounting bracket lock  200  may be configured such that if the attachment member  162  (e.g., the second section  171  of the upper wall  168 ) is not in a fully attached position relative to the rail  142 , the mounting bracket lock  200  will not slide into the locked position, for example via the dimensions and/or tolerances with which the opening  224  is configured. 
     Additionally, as the mounting bracket lock  300  moves into the locked position the second portion  326  of the body  302  may be received in the cavity  176  of the attachment member  162 . The second portion  326  may generate a friction fit within the cavity  176 , which may secure the mounting bracket lock  300  in position relative to the first housing bracket  160 . More specifically, the lower surface  332  of the first projection  328  may abut (e.g., engage with) the inner surface  179  of the intermediate wall  172  of the attachment member  162 , and the upper surface  340  of the third projection  338  may abut (e.g., engage with) the inner surface  177  of the first section  169  of the upper wall  168  of the attachment member  162 . The wedge shape of the second portion  326  may cause the lower surface  332  of the first projection  328  and the upper surface  340  of the third projection  338  to apply friction forces against inner surfaces  179 ,  177 , respectively, of the cavity  176 . 
     Furthermore, as the mounting bracket lock  300  moves into the locked position, the lower surface  336  of the second projection  334  may abut (e.g., engage with) the upper surface  175  of the lip  174  of the attachment member  162 . Friction force applied by the lower surface  336  of the second projection  334  against the upper surface  175  of the lip  174  may contribute to securement of the first housing bracket  160  in position relative to the rail  142 . 
     In an example operation of removing the first housing bracket  160  from the rail  142 , the mounting bracket lock  300  may be operated to an unlocked position (e.g., as shown in  FIG.  8 A ) by causing the mounting bracket lock  300  to slide away from the first end  141  of the rail  142 , for instance by applying pressure to the groove  342 . With the mounting bracket lock  300  in an unlocked position, the first housing bracket  160  may be detached from the rail  142 . For example, downward pressure may be applied to the second section  171  of upper wall  168  of the attachment member  162 , thereby causing the jog  170  to slip past the ridge  149  of the upper wall  146  of the rail  142 . The upper end  165  of the attachment member  162  may then be pivoted downward and away from the upper end  145  of the rear wall  144 . As the attachment member  162  pivots forward from the rear wall  144 , the edge  178  may become unseated from the ridge  152  of the lower wall  150  of the rail  142 , such that the first housing bracket  160  may then be removed from the rail  142 . 
     It should be appreciated that the mounting bracket lock  300  is not limited to the example configuration illustrated and described herein. For example, the mounting bracket lock  300  may be alternatively provided in a configuration that is mirrored relative to the illustrated mounting bracket lock  300  (e.g., reflected in a plane defined by the transverse direction T and the lateral direction A). Such an alternate configuration of the mounting bracket lock  300  may be used, for example, to secure the second housing bracket  180  to the second end  143  of the rail  142 . Moreover, the mounting bracket lock  300  may be alternatively configured with more, fewer, or different projections that extend from the first and/or second portions  312 ,  326  of the body  302 . In accordance with such alternate configurations, the projections  328 ,  334 , and  338  may be referred to as other than the first, second, and third projections, respectively. 
     It should further be appreciated one or more mounting bracket locks  300  may be provided with other components of the housing of a window treatment, such as the first and second housing brackets  160 ,  180 , and the rail  142 . In this regard, the mounting bracket lock  300  may be a component of a window treatment housing (e.g., the housing  140 ), and more generally may be a component of a window treatment (e.g., the motorized roller shade  100 ). It should further still be appreciated that one or more mounting bracket locks  300  may be provided with a window treatment kit, or may be provided separately, for example in accordance with a retrofit installation of the mounting bracket locks  300 . It should further still be appreciated that the example mounting bracket lock  300  is not limited to use with the housing of a roller shade window treatment, such as the motorized roller shade  100 . For example, the mounting bracket lock  300  may be adapted for use with the respective housings of other types of window treatments, such as roman shades, venetian blinds, draperies, and so on.