Abstract:
A telescopic suitcase handle is provided for including a telescopic handle housing disposed within a suitcase, a lower extendible handle section movably disposed within the telescopic handle housing, and an upper extendible handle section movably disposed within the lower section. A spring loaded bullet disposed within the upper section releasably engages with one of a plurality of openings along the length of the lower section for temporarily holding the upper extendible handle section in place. A spring-loaded protrusion releasably engages with the lower extendible handle section for temporarily holding the lower section in place.

Description:
RELATED APPLICATIONS 
       [0001]    This application claims priority to U.S. Provisional Patent Application Ser. No. 62/187,652, filed on Jul. 1, 2015, entitled Telescopic Suitcase Handle by Paul V. Scicluna, Peter C. Wu, and Victor G. Sanz, the disclosures of which are incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The disclosed invention relates to a telescopic suitcase handle and locking mechanism, and more particularly to a telescopic handle and locking mechanism for a suitcase in which the release mechanism for the locking mechanism is located on the body of the luggage so as to allow for a greater range of designs for the telescopic handle. 
       BACKGROUND 
       [0003]    Contemporary luggage designs often include wheels and a handle so that a user can more easily roll heavy luggage through an airport or other location with greater ease. Suitcase handles may comprise one or more lengths of rigid tubing that extend upwards from the top of the suitcase and include a handle or grip portion at its top for the user to grip and pull. In this manner, suitcases may be tipped at an angle so that the weight of the suitcase is carried by the wheels, while the upper portion of the suitcase is held at an angle and pulled by the user. Many luggage designers attempt to conceal the handle for such luggage within the body of the luggage during periods of non-use in order to maintain the overall appearance of the luggage and to preserve a regular shape for the luggage so that it can be more easily stacked by users or baggage handlers. Furthermore, such extendable or “telescopic” luggage handles may also include one or more locking mechanisms so that the telescopic handle remains in an inserted position during periods of non-use and may also be held in an extended position during periods of use. 
         [0004]    Luggage designers employ several techniques for the design of telescopic luggage handles and locking mechanisms. One common design uses a series of concentric metal or hard plastic tubes, so that the interior tubes may be inserted or withdrawn from the exterior tubes in a telescopic fashion. A typical suitcase handle may include two parallel series of concentric tubes connected at the top by a horizontal handle or gripping portion. The base of both series of concentric tubes may be fastened to the wheel assembly or an internal support structure for the suitcase so that the series of concentric tubes will not be separated from the suitcase when fully extended. 
         [0005]    Telescopic suitcase handles may also include locking mechanisms to both maintain the telescopic suitcase handle in the inserted position within the suitcase as well as maintain the telescopic suitcase handle in an extended position outside of the suitcase. Some telescopic suitcase handles provide a button on the top of the handle or gripping portion which controls, through a cable, one or more spring-loaded, retractable bullets within the series of concentric tubes comprising the telescopic handle. When pressed, the button retracts the one or more spring-loaded bullets, from corresponding openings within the external tube within the series of concentric tubes, allowing the user to then reposition the internal tube. Once the internal tube is repositioned, the one or more spring-loaded bullets may be released by releasing the button on the handle or gripping portion, allowing the one or more spring-loaded bullets to slide into a new opening within the external tube, corresponding to the new position of the telescopic handle. 
         [0006]    One shortcoming of the above-described telescopic handle design is that it requires internal hardware, such as a cable, to be disposed within and along the length of the series of concentric tubes so that the button at the top of the handle or gripping portion may control the spring-loaded bullet as the internal tubes are repositioned within the external tubes. This configuration precludes designers from using narrow, thin, solid, or substantially open telescopic handle designs that do not have an internal space for accommodating the necessary hardware for the locking mechanism. Examples of this disclosure relate to a telescopic suitcase handle design that seeks to solve this limitation of the prior art by providing a new locking mechanism that is controlled without the need for a button on the handle or gripping portion of the telescopic handle and without the need for a cable or similar hardware located on the interior of an internal tube. 
       SUMMARY OF THE INVENTION 
       [0007]    In one example of the present disclosure, a telescopic suitcase handle may be provided, including a telescopic handle housing disposed within a suitcase, a lower extendible handle section movably disposed within the telescopic handle housing when the telescopic suitcase handle is in a fully inserted position, a spring-loaded protrusion that releasably engages with one of a plurality of openings along the length of the lower extendible handle section for temporarily holding the lower extendible handle section in place with respect to the telescopic handle housing, a button for temporarily disengaging the protrusion from the lower extendible handle section, wherein the button is not located on the telescopic suitcase handle, an upper extendible handle section movably disposed within the lower extendible handle section when the telescopic handle is in a fully inserted position, and a spring loaded bullet disposed within the upper extendible handle section that releasably engages with one of a plurality of openings along the length of the lower extendible handle section for temporarily holding the upper extendible handle section in place with respect to the lower extendible handle section. In some examples, the telescopic suitcase handle may further include a handle portion at the top end of the telescopic suitcase handle, two parallel lengths of the lower extendible handle section, and two parallel lengths of upper extendible handle section. In other examples, the telescopic suitcase handle may further include a recessed handle housing on a suitcase for receiving the handle portion of the telescopic suitcase handle when the telescopic suitcase handle is in a fully inserted position. In such examples, the spring-loaded protrusion may be disposed within the recessed handle housing and the button may be disposed on the recessed handle housing. The upper extendible handle section includes a plug at its lower end, and the spring-loaded bullet may be disposed within the plug. In other examples, the upper extendible handle section may have one or more ornamental cutout sections. In some examples, the telescopic suitcase handle may further include a lower frame member for attaching to the telescopic handle housing and the lower frame member may be attached to either an internal support frame for a suitcase or the hard shell of a suitcase. 
         [0008]    In some examples of the telescopic suitcase handle, the openings on the lower extendible handle section and on the upper extendible handle section are configured to allow the telescopic suitcase handle to temporarily lock in at least a fully inserted, partially extended, and fully extended position. In other examples, the spring-loaded bullets may be disengaged by depressing a portion of the spring-loaded bullet that extends beyond the outer surface of the lower extendible handle section. In other examples, spring-loaded bullets have a substantially rounded head, such that the spring-loaded bullets may be disengaged by the surrounding lower extendible handle section, when a user exerts a downward or upward force on the upper extendible handle section and, in some examples, may disengage with an upward or downward force on the upper extendible handle section of greater than or equal to about five pounds. In yet further examples, the spring-loaded bullets have a ramped section at its head, such that the spring-loaded bullets may be disengaged by the surrounding lower extendible handle section, when a user exerts a downward or upward force on the upper extendible handle section and, in some examples, may disengage with an upward or downward force on the upper extendible handle section of greater than or equal to about five pounds. 
         [0009]    In some examples of the telescopic suitcase, the spring-loaded protrusions may comprise at least one ramped section having a top surface, and the button has at least one ramped section with a lower surface that is in contact with the top surface of the at least one ramped section on the spring-loaded protrusions, wherein depressing the button causes the at least one ramped section on the button to slide down the at least one ramped section on the spring-loaded protrusions, thereby retracting the spring-loaded protrusions. In some examples, the telescopic suitcase handle also has plurality of openings along the length of the lower extendible handle section for temporarily holding the lower extendible handle section in place with respect to the telescopic handle housing, comprise at least two openings for temporarily holding the lower extendible handle section in a fully inserted or fully extended position, with respect to the telescopic handle housing. In other examples, the plurality of openings along the length of the lower extendible handle section for temporarily holding the upper extendible handle section in place with respect to the lower extendible handle section may comprise at least two openings for temporarily holding the upper extendible handle section in a fully inserted or fully extended position, with respect to the lower extendible handle section. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]    Various aspects of at least one example of the present disclosure are discussed below with reference to the accompanying figures. The figures are provided for the purposes of illustration and explanation and are not intended as a definition of the limits of the invention. In the figures: 
           [0011]      FIG. 1A  is a front view of a suitcase with a telescopic suitcase handle according to an example of this disclosure, in a partially extended position; 
           [0012]      FIG. 1B  is a rear view of a suitcase with a telescopic suitcase handle according to an example of this disclosure, in a partially extended position; 
           [0013]      FIG. 1C  is a front view of a suitcase with a telescopic suitcase handle according to an example of this disclosure, in a fully extended position; 
           [0014]      FIG. 1D  is a rear view of a suitcase with a telescopic suitcase handle according to an example of this disclosure, in a fully extended position; 
           [0015]      FIG. 2  is front perspective view of a telescopic suitcase handle according to an example of this disclosure, in a fully inserted position; 
           [0016]      FIG. 3  is front perspective view of a telescopic suitcase handle according to an example of this disclosure, in a partially extended position; 
           [0017]      FIG. 4  is a front perspective view of a telescopic suitcase handle according to an example of this disclosure, in a fully extended position; 
           [0018]      FIG. 5A  is a cross-sectional view of a telescopic suitcase handle in a fully extended and locked position, according to an example of this disclosure; 
           [0019]      FIG. 5 b    is an enlarged cross-sectional view of the connection between an upper extendible handle section and a lower extendible handle section in a fully extended and locked position, according to an example of this disclosure; 
           [0020]      FIG. 5C  is an enlarged cross-sectional view of the connection between a recessed handle housing and a lower extendible handle section in a fully extended and locked position, according to an example of this disclosure; 
           [0021]      FIG. 6A  is a cross-sectional view of a telescopic suitcase handle in a partially extended and locked position, according to an example of this disclosure; 
           [0022]      FIG. 6B  is an enlarged cross-sectional view of the connection between a recessed handle housing, a lower extendible handle section, and an upper extendible handle section in a partially extended and locked position, according to an example of this disclosure; 
           [0023]      FIG. 7A  is a cross-sectional view of a telescopic suitcase handle in a fully inserted and locked position, according to an example of this disclosure; 
           [0024]      FIG. 7 b    is an enlarged cross-sectional view of the connection between a recessed handle housing, a lower extendible handle section, and an upper extendible handle section in a fully inserted and locked position, according to an example of this disclosure; 
           [0025]      FIG. 7C  is an enlarged cross-sectional view of the lower portion of a telescopic suitcase handle in a fully inserted and locked position, according to an example of this disclosure; 
       
    
    
     LIST OF REFERENCE NUMERALS UTILIZED IN THE DRAWINGS 
       [0026]    With regard to reference numerals used, the following numbering is used throughout the description and drawings. Where technical features in the figures or detailed description are followed by these reference numerals, the reference numerals have been included for the sole purpose of increasing the intelligibility of the figures or detailed description. Accordingly, neither the reference numerals nor their absence are intended to have any limiting effect on the scope of any claim elements. In the figures, each identical or nearly identical component that is illustrated in various figures is represented by a like numeral. For purposes of clarity, not every component may be labeled in every figure. 
         [0027]    Reference numeral  2  refers to a suitcase. 
         [0028]    Reference numeral  4  refers to a front side of a suitcase. 
         [0029]    Reference numeral  6  refers to a rear side of a suitcase. 
         [0030]    Reference numeral  8  refers to a top side of a suitcase. 
         [0031]    Reference numeral  10  refers to a bottom side of a suitcase. 
         [0032]    Reference numeral  12  refers to base portion of a suitcase. 
         [0033]    Reference numeral  14  refers to rollers, casters, or wheels. 
         [0034]    Reference numeral  16  refers to a recessed handle housing. 
         [0035]    Reference numeral  18  refers to a telescopic handle. 
         [0036]    Reference numeral  20  refers to a handle portion. 
         [0037]    Reference numeral  22  refers to one or more handle openings. 
         [0038]    Reference numeral  24  refers to a button. 
         [0039]    Reference numeral  26  refers to an upper extendible handle section. 
         [0040]    Reference numeral  28  refers to a lower extendible handle section. 
         [0041]    Reference numeral  30  refers to one or more apertures. 
         [0042]    Reference numeral  32  refers to a telescopic handle housing. 
         [0043]    Reference numeral  34  refers to a lower frame member. 
         [0044]    Reference numeral  36  refers to a plug. 
         [0045]    Reference numeral  38  refers to a top cap. 
         [0046]    Reference numeral  40  refers to openings. 
         [0047]    Reference numeral  42  refers to spring-loaded bullets. 
         [0048]    Reference numeral  44  refers to one or more springs. 
         [0049]    Reference numeral  46  refers to an opening. 
         [0050]    Reference numeral  48  refers to one or more spring-loaded bolts. 
         [0051]    Reference numeral  50  refers to one or more springs. 
         [0052]    Reference numeral  54  refers to one or more openings. 
         [0053]    Reference numeral  56  refers to one or more openings. 
         [0054]    Reference numeral  58  refers to a plug. 
         [0055]    Reference numeral  60  refers to posts. 
         [0056]    Reference numeral  62  refers to openings. 
       DETAILED DESCRIPTION 
       [0057]    Reference will now be made in detail to representative examples illustrated in the accompanying drawings. It should be understood that the following descriptions are not intended to limit the examples to one preferred example. To the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the described examples as defined by the appended claims. 
         [0058]    As disclosed herein, the devices and methods presented can be used for a telescopic suitcase handle that provides a new locking mechanism that is controlled without the need for a button on the handle or gripping portion of a telescopic handle and without the need for a cable or similar hardware located along the interior of a telescopic handle. 
         [0059]    For the purpose of explanation and illustration, and not limitation, an example of a suitcase with a telescopic handle is shown in  FIGS. 1A-1D . As illustrated, the suitcase  2  shown in  FIGS. 1A-1D  can be of any suitable construction in terms of materials, manner of assembly, and configurations of the parts, including both hard shell luggage and soft luggage. In some examples, a telescopic handle may be used with a wheeled suitcase. The exemplary suitcase  2 , as shown in  FIGS. 1A-1D , includes a front side  4 , and rear side  6 , a top side  8 , and a bottom side  10 . Proximate to bottom side  10 , suitcase  2  may include a base portion  12  formed of hard plastic or other suitable material to which rollers, casters, or wheels  14  may be attached. Base portion  12  may be further attached to an internal frame or support structure within suitcase  2 . However, in hard shell luggage, base portion  2  may be unnecessary and rollers, casters, or wheels  14  may my attached directly to bottom side  10  where suitcase  2  comprises a hard shell suitcase. 
         [0060]    Proximate to top side  8 , suitcase  2  also includes a recessed handle housing  16  that is formed of hard plastic material or another suitably rigid material. In some examples, recessed handle housing  16  may be disposed on the top side  8  and adjacent to rear side  6 . However, in other examples, recessed handle housing  16  may be disposed anywhere on top side  6 , or any other side of suitcase  2 , and may preferably be located approximately in the middle of top side  8 . Recessed handle housing  16  may comprise any suitable shape for receiving handle portion  20  of telescopic handle  18 , when telescopic handle  18  is in a fully-inserted position. Recessed handle housing  16  may also include one or more handle openings  22  for receiving telescopic handle  18  and through which telescopic handle  18  may slide when it is being inserted or retracted into suitcase  2 . Recessed handle housing  16 , may further include a button  24  that controls the locking mechanism for the telescopic handle  18 . However, in other examples, button  24  may be located elsewhere on suitcase  2 , so long as button  24  is readily accessible to the user when suitcase  2  is in use. In a preferred example, button  24  is not located on telescopic handle  18 . 
         [0061]      FIGS. 1A and 1B  show telescopic handle  18  in a partially extended position, while  FIGS. 1C and 1D  show telescopic handle  18  in a fully extended position. As shown, telescopic handle  18  may comprise two extendible handle sections, including an upper extendible handle section  26  and a lower extendible handle section  28 . As shown in  FIGS. 1A-1B , in some examples, telescopic handle  18  may comprise two parallel pairs of extendible handle sections that are attached at the top to the two ends of handle portion  20 . In other examples, telescopic handle  18  may comprise just one upper extendible handle section  26  and one lower extendible handle section  28  that may be attached to one end or the middle of handle portion  20 . 
         [0062]    In some examples, handle portion  20  may comprise a horizontal portion that a user may grip with their hand while pulling or pushing suitcase  2 . Handle portion  20  may comprise any suitably rigid material, such as hard plastic, ABS plastic, PVC, metal, wood, or other substantially rigid materials as are known to those of ordinary skill in the art. In some examples, handle portion  20  may further include a leather or cloth wrapping around the horizontal gripping portion for the comfort of the user as well as to improve the overall appearance of suitcase  2 . As shown, for example, in  FIGS. 1A-1D , the horizontal portion of handle portion  20  may be connected to a but end for attaching handle portion  20  to upper extendible handle section  26 . The horizontal portion and but ends of handle portion  20  need not be separate components, but may be integrally formed with one another. Handle portion  20  may be attached to upper extendible handle section  26  using any suitable means of attachment as are known to those of ordinary skill in the art, including screwing, welding, soldering, locking, or otherwise fastening. As shown in  FIGS. 1A-1D , a tongue projecting from the bottom of the but ends of handle portion  20  may matingly fit into a groove on upper extendible handle section  26 , which tongue may be further screwed and/or glued to upper extendible handle section  26 . 
         [0063]    Upper extendible handle section  26  may comprise a length of rigid material, such as hard plastic, ABS plastic, PVC, metal, wood, or other substantially rigid materials as are known to those of ordinary skill in the art. Unlike other telescopic luggage handles, upper extendible handle section may also comprise one or more apertures  30  and may also be formed of a solid construction with no hollow internal space for accommodating a cable for use with a locking mechanism. Upper extendible handle section  26  may therefore comprise any aesthetically pleasing design and shape and is not confined by the need to accommodate any internal components along its length, such as a cable. At its lower end, upper extendible handle section  26  is movably disposed within lower extendible handle section  28 , which has an internal cross-sectional shape and dimensions that substantially match the external cross-sectional shape and dimensions of upper extendible handle section  26 . In a preferred example, the internal dimensions of lower extendible handle section  28  may be slightly larger than the external dimensions of upper extendible handle section  26 , in order to allow upper extendible handle section  26  to easily slide within lower extendible handle section  28 . 
         [0064]    As shown, for example, in  FIGS. 1C-1D , lower extendible handle section  28  may comprise a length of rigid material, such as hard plastic, ABS plastic, PVC, metal, wood, or other substantially rigid materials as are known to those of ordinary skill in the art. At its lower end, lower extendible handle section  28  may be movably disposed within handle openings  22  in recessed handle housing  16 . Handle openings  22  may have an internal shape and diameter that is substantially similar to the external shape and diameters of lower extendible handle section  28 . Preferably, the internal dimensions of openings  22  may be slightly larger than the external dimensions lower extendible handle section  28 , in order to allow lower extendible handle section  28  to easily slide within handle openings  22 . As shown, for example, in  FIGS. 1A-1B , in some examples, lower extendible handle section  28  may not protrude from handle openings  22  when telescopic handle  18  is in a fully inserted or partially extended position. However, lower extendible handle section  28  may be visible when telescopic handle  18  is in a fully extended position. 
         [0065]      FIGS. 2-4  are internal views of a telescopic suitcase handle according to an example of this disclosure in fully inserted ( FIG. 2 ), partially extended ( FIG. 3 ) and fully extended ( FIG. 4 ) positions. As shown in  FIGS. 2-4 , telescopic handle  18  collapses into telescopic handle housing  32  when telescopic handle  18  is in an inserted position. Telescopic handle housing  32  may comprise a stationary tube for receiving upper extendible handle section  26  and lower extendible handle section  28  when telescopic handle  18  is in an inserted position. Thus, when telescopic handle  18  is in a fully inserted position, upper extendible handle section  26  may be disposed within lower extendible handle section  28 , which, in turn, may be disposed within telescopic handle housing  32 . Telescopic handle housing  32  may comprise a length of rigid tube material, such as hard plastic, ABS plastic, PVC, metal, wood, or other substantially rigid materials as are known to those of ordinary skill in the art. The hollow space within telescopic handle housing  32  may have an internal shape and diameter that is substantially similar to the external shape and diameter of lower extendible handle section  28 . Preferably, the internal dimensions of the hollow space within telescopic handle housing  32  may be slightly larger than the external dimensions lower extendible handle section  28 , in order to allow lower extendible handle section  28  to easily slide within telescopic handle housing  32 . 
         [0066]    As further shown in  FIGS. 2-4 , telescopic handle housing  32  is attached, at its lower end, to a lower frame member  34 . Lower frame member  34  may be attached to telescopic handle housing  32  using any suitable means of attachment as are known to those of ordinary skill in the art, including gluing, welding, screwing, soldering, locking, or otherwise fastening. In some examples, telescopic handle housing  32  may be integrally formed with lower frame member  34  such that no fastening is required. Lower frame member  34  may be fastened to an internal frame section of suitcase  2  or base portion  12 , or, in the case of a hard shell suitcase, the bottom of suitcase  2 , in order to fix the position of both lower frame member  34  as well as telescopic handle housing  32 . Lower frame member  34  may be attached to an internal frame section or the bottom of suitcase  2  using any suitable means of attachment as are known to those of ordinary skill in the art, including gluing, welding, screwing, soldering, locking, or otherwise fastening. With the position of the lower frame member  34  and telescopic handle housing  32  are fixed with respect to suitcase  2 , telescopic handle  18  may be freely withdrawn from telescopic handle housing  32 . 
         [0067]      FIGS. 5-7  provide a cross-sectional view of a telescopic handle  18  in both a fully extended position ( FIG. 5 ), a partially extended position ( FIG. 6 ), and a fully inserted position ( FIG. 7 ). These cross sectional views demonstrate the locking mechanisms that control the position of telescopic handle  18  as it is withdrawn or inserted into telescopic handle housing  32 . For example,  FIGS. 5A-C  show a cross sectional view of telescopic handle  18  in a fully extended position. As shown in the cross section, when fully extended, a plug  36  may be disposed at the bottom of upper extendible handle section  26 . Plug  36  may comprise any impact-resistant, and durable material, such as a hard rubber or plastic. When telescopic handle  18  is fully extended, plug  36  abuts top cap  38  which may be disposed at the top of lower extendible handle section  28  so as to stop upper extendible handle section  26  from completely exiting lower extendible handle section  28 . Top cap  38  may comprise any impact-resistant and durable material, such as a hard rubber or plastic. 
         [0068]    As shown, for example, in  FIGS. 5A-5C , upper extendible handle section  26  is configured to temporarily lock into place when plug  36  abuts top cap  38  in a fully extended position. For example, plug  36  may include openings  40  that may include one or more spring-loaded bullets  42 . Spring loaded-bullet  42  may comprise a hard plastic or metal cylinder that is disposed in a horizontal direction and persistently biased in the outward direction by one or more springs  44 . When telescopic handle  18  is in the fully extended position, spring loaded bullet  42  aligns with a corresponding opening  46  on the exterior of lower extendible handle section  28 , thus allowing spring-loaded bullet  42  to pass through opening  46 , temporarily locking upper extendible handle section  26  in place within lower extendible handle section  28  as shown, for example, in  FIG. 5B . Spring-loaded bullet  42  may be released when the user presses spring-loaded bullet  42  back through opening  46  or, alternatively, spring-loaded bullet  42  may have a substantially rounded end that may be pushed back through opening  46  when the user applies sufficient downward or upward force to handle portion  20 . In such examples, the rounded end of spring-loaded bullet  42  may contact the outer surface of lower extendible handle section  28 , forcing the rounded end of spring-loaded bullet to slip under the outer surface of lower extendible handle section  28 , thereby retracting. In an alternative example, bullet  42  may have a ramped or tapered shape at its end that may similarly be pushed back through opening  46  when the user applies sufficient downward or upward force to handle portion  20 . 
         [0069]    As further shown in  FIGS. 5A-C , lower extendible handle section  28  may be held in place within telescopic handle housing  32  by one or more spring-loaded bolts  48 . Spring-loaded bolts  48  may comprise a hard plastic or metal cylinder that is disposed in a horizontal direction within recessed handle housing  16  and persistently biased in the outward direction by one or more springs  50 , as shown, for example, in  FIG. 5C . When lower extendible handle section  28  is in a fully-extended position, spring-loaded bolts  48  will align with one or more corresponding openings  46  on the lower portion of lower extendible handle section  28 , through which spring-loaded bolts  48  may pass, thereby locking lower extendible handle section  28  in place within telescopic handle housing  32 . In this manner, telescopic handle  18  may be maintained in a fully extended position while a user pushes or pulls suitcase  2 . 
         [0070]    To collapse telescopic handle  18  from a fully extended position, as shown in  FIGS. 5A-C , to a partially extended position, as shown in  FIGS. 6A-B , a user may press button  24 , which includes a mechanism for retracting spring-loaded bolts  48 . In some examples, button  24 , may include a ramp at its bottom end that cooperates with a corresponding ramp on spring-loaded bolts  48  so that the bolts are retracted when button  24  is held in the downward position, as shown, for example, in  FIG. 6B . However, any suitable means for retracting spring-loaded bolts  48  may be employed, as is known to those of ordinary skill in the art. With spring-loaded bolts  48  retracted, a user may then apply a downward force to the top of handle portion  20  so that telescopic handle  18  slides downward further into telescopic handle housing  32 . As lower extendible handle section  28  passes through recessed handle housing  16 , spring-loaded bolts  48  may engage with one or more corresponding openings  54  on the upper portion of lower extendible handle section  28 . In this manner, telescopic handle  18  may be maintained in a partially extended position while a user pushes or pulls suitcase  2 , as shown, for example, in  FIGS. 6A-B . 
         [0071]    To collapse telescopic handle  18  from a partially extended position, as shown in  FIGS. 6A-B , to a fully inserted position, as shown in  FIGS. 7A-C , the user may press button  24 , which includes a mechanism for retracting spring-loaded bolts  48 , as previously described above. With spring-loaded bolts  48  again retracted, a user may then apply a downward force to the top of handle portion  20  so that telescopic handle  18  slides downward further into telescopic handle housing  32 . As lower extendible handle section  28  passes through recessed handle housing  16 , spring-loaded bolts  48  may engage with one or more corresponding openings  56  on the top portion of lower extendible handle section  28 . At the same time, plug  58 , at the bottom of lower extendible handle section  28 , may contact posts  60 , which may be disposed within the lower portion of telescopic handle housing  32 , thereby halting the downward progress of lower extendible handle section  28 . Plug  58  and posts  60  may comprise any impact-resistant, and durable material, such as a hard rubber or plastic. In other examples, posts  60  may be replaced with another impact resistant plug, disposed within the lower portion of telescopic handle housing  32 . 
         [0072]    Once spring-loaded bolts  48  engage with openings  56  and plug  58  contacts posts  60 , the downward progress of lower extendible handle section  28  is halted. The user may then further collapse telescopic handle  18  by exerting sufficient downward force on handle portion  20  to cause spring-loaded bullet  42  to retract within opening  46 , so that upper extendible handle section  26  may slide downward within lower extendible handle section  28 . As upper extendible handle section  26  slides downward, the lower surface of plug  36  contacts the top surface of plug  58 , halting the downward motion of upper extendible handle section  26  as shown, for example, in  FIGS. 7A and 7C . At the same time, spring-loaded bolts  48 , which are already disposed within openings  56 , also may further extend through openings  62  in the upper extendible handle section  26 , thus locking both lower extendible handle section  28  and upper extendible handle section  26  in a fully inserted position within telescopic handle housing  32 , as shown, for example in  FIGS. 7A-C . 
         [0073]    To extend telescopic handle  18  back to a partially extended position, the user would perform the above-described method of operation, but in the reverse direction. From a fully inserted position, as shown, for example, in  FIGS. 7A-C , a user may press button  24  to disengage spring-loaded bolt  48 , as previously described. A user may then supply an upward force on handle portion  20  sufficient to extend upper extendible handle section  26  up through lower extendible handle section  28 . When the top surface of plug  36  contacts the lower surface of top cap  38 , spring-loaded bullet  42  passes through opening  46 , locking upper extendible handle section  26  into place with respect to lower extendible handle section  28 . A user may continue to lift telescopic handle  18  upwards until spring-loaded bolts  48  may engage with corresponding openings  54  on the upper portion of lower extendible handle section  28 . In this manner, telescopic handle  18  may be maintained in a partially extended position while a user pushes or pulls suitcase  2 , as shown, for example, in  FIG. 6A . 
         [0074]    To extend telescopic handle  18  to a fully extended position, as shown, for example, in  FIGS. 5A-C , a user may press button  24  to disengage spring-loaded bolt  48 , as previously described. A user may then supply an upward force on handle portion  20  sufficient to extend lower extendible handle section  28  up through telescopic handle housing  32 . When spring loaded bolts  48  align with one or more corresponding openings  46  on the lower portion of upper extendible handle section  26 , spring-loaded bolts  48  will engage with corresponding openings  46 , thereby locking telescopic handle  18  in a fully extended position, as shown, for example, in  FIGS. 5A-C . 
         [0075]    While the disclosed subject matter is described herein in terms of certain exemplary examples, those skilled in the art will recognize that various modifications and improvements can be made to the disclosed subject matter without departing from the scope thereof. As such, the particular features claimed below and disclosed above can be combined with each other in other manners within the scope of the disclosed subject matter such that the disclosed subject matter should be recognized as also specifically directed to other examples having any other possible permutations and combinations. It will be apparent to those skilled in the art that various modifications and variations can be made in the systems and methods of the disclosed subject matter without departing from the spirit or scope of the disclosed subject matter. Thus, it is intended that the disclosed subject matter include modifications and variations that are within the scope of the appended claims and their equivalents.