US20030009848A1 - Locking device for retractable handle of luggage - Google Patents
Locking device for retractable handle of luggage Download PDFInfo
- Publication number
- US20030009848A1 US20030009848A1 US09/904,489 US90448901A US2003009848A1 US 20030009848 A1 US20030009848 A1 US 20030009848A1 US 90448901 A US90448901 A US 90448901A US 2003009848 A1 US2003009848 A1 US 2003009848A1
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- United States
- Prior art keywords
- handle
- sliding
- locking
- locking device
- locking devices
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C13/00—Details; Accessories
- A45C13/26—Special adaptations of handles
- A45C13/262—Special adaptations of handles for wheeled luggage
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C13/00—Details; Accessories
- A45C13/26—Special adaptations of handles
- A45C13/262—Special adaptations of handles for wheeled luggage
- A45C2013/267—Special adaptations of handles for wheeled luggage the handle being slidable, extractable and lockable in one or more positions
Definitions
- the present invention relates to a retractable handle of luggage and more particularly to a locking device for a retractable handle of luggage.
- a retractable luggage handle uses a single-stroke locking device and is equipped with only one locking device to control the luggage handle's movement.
- This one locking device is usually installed at the bottom of a single sliding tube and is provided as a medium element between the one sliding tube and a supporting tube.
- more height options are created for the retractable handle.
- the length of an extendable luggage handle, which precedes the full height of an upright luggage should be no taller than the height of the luggage case itself. Warsaw Convention also stipulates the permissible maximum dimensions for carry-on luggage.
- the total bulk height of an upright luggage body should still be shorter than the straight-line distance measured from the draping fingertips of a naturally-posed, standing individual to the ground. This means that the user is often urged to bend his/her back to reach the luggage handle in order to get hold of the luggage. It is obvious that the conventional design is not a handy design for most users.
- the user in order for the user to move his/her luggage in and out of luggage storage areas inside an airplane or an automobile, the user often needs to retract the handle to its lowest position to perform a smooth loading task. Since, in the conventional design, there is only one retraction stroke provided on the locking device of the luggage handle, the lowest position of the handle grip also means the closure of the sliding tube to the supporting tube of the luggage handle. That is to say, no allowance is ever given between the user's handhold position and the luggage body when the user is trying to partially retract the handle and move it to the luggage storage space in a transportation vehicle.
- Such a luggage handle's on-the-run positioning leads to an unfavorable physical placement of the luggage body, which in turn causes the center line of the luggage handle grip to be tilted away from the center line of the luggage body when the luggage is lifted.
- the lower portion of the luggage will come nearer to the user than the top portion thereof.
- the unfavorable physical position of a dangling piece of luggage interferes with the user's physical movement.
- Another objective of the present invention is to produce a locking device for the retractable handle of a luggage piece, wherein the mechanical structure of the new locking device is generally simplified so as to effect a quick assembly in the manufacturing process.
- the present invention embodies a handle system for the luggage which comprises two symmetrically identical portions, each having a handle grip and a push button thereon, a first sliding tube affixed to the end of the handle grip, a first locking device detachably attached to the bottom of the first sliding tube, a second sliding tube with a plurality of holes drilled upon it for allowing the first sliding tube to glide freely therein, a second locking device detachably attached to the bottom of the second sliding tube, a supporting tube with a plurality of holes drilled upon it for allowing the second sliding tube to glide freely therein, and a first connecting means linked between the push button and the first locking device; wherein the second locking device comprises an upper portion, a lower portion, a sliding block longitudinally slidable within the upper portion, a spring laterally biased in the lower portion, a locking block laterally slidable within the lower portion, and a second connecting means having the top end clung to the first locking device and the second locking device
- FIG. 1 is an exploded view of a preferred embodiment of a locking device for the retractable handle of luggage according to the invention
- FIGS. 2A and 2B are first and second sectional views showing the retracted positions of the fully retracted handle, respectively;
- FIGS. 3A and 3B are similar to FIGS. 2A and 2B, respectively, where the push button is pressed to cause the handle grip to be pulled up a small distance from the bezel recess located on top of the luggage and be fixedly locked thereat;
- FIGS. 4A and 4B are similar to FIGS. 3A and 3B, respectively, where the push button is again pressed to cause the handle grip to be pulled up again so that the first locking device is locked into the upper hole of the second sliding tube and the second locking device is locked into the lower hole of the supporting tube;
- FIGS. 5A and 5B are similar to FIGS. 4A and 4B, respectively, where the push button is pressed again to cause the handle grip to be further pulled up so that the first locking device is cleared from the upper hole of the second sliding tube, and the second locking device is moved up;
- FIGS. 6A and 6B are similar to FIGS. 5A and 5B, respectively, where the second locking device is locked into the upper hole of the supporting tube so as to pull the second locking device in an extension position, and the first locking device is pull by the steel cable and retracted into the second sliding tube;
- FIGS. 7A and 7B are similar to FIGS. 6A and 6B respectively, where the handle is fully extended and locked;
- FIGS. 8A and 8B are similar to FIGS. 7A and 7B, respectively, where the first locking device is retracted into the second sliding tube by pressing the push button so that the bottom of the first locking device is engaged with the top of the second locking device, wherein the lock pin of the second locking device is not fully extended such that the second locking device is suppressed by the first locking device to clear the second locking device from the upper hole of the supporting tube.
- FIG. 1 shows a multi-stroke locking device for the retractable handle of a luggage piece constructed in accordance with the present invention, wherein the handle system is provided at the back of the luggage with a handle grip retractable to a recess located on top of the luggage.
- the handle system of the present invention comprises a first sliding tube 10 , a first locking device 20 , a first sleeve member 30 , a second sliding tube 40 , a second locking device 50 , a second sleeve member 60 , and a supporting tube 70 .
- the first sliding tube 10 has a lower hole 13 and an upper hole 12 ; the upper hole 12 is connected to the receiving opening on one side of the handle grip (not shown) by a known fastener.
- the first locking device 20 is detachably attached to the bottom of the first sliding tube 10 .
- the second sliding tube 40 is provided to allow the first sliding tube 10 to glide freely therein and contains the top, middle, and lower holes 45 , 46 , and 47 on a first side, two apertures 42 on the first and third sides, and two pin holes 43 on a second and fourth side.
- the first sleeve member 30 is fitted to the top of the second sliding tube 40 and has two slightly protruded projections 32 located at the two opposite sides of the sleeve member's 30 outer surface; the two projections 32 are provided to couple with the two apertures 42 of the second sliding tube 40 .
- the second locking device 50 is detachably attached to the bottom of the second sliding tube 40 and is secured to the second sliding tube 40 by a pin 44 .
- the supporting tube 70 is provided to allow the second sliding tube 40 to glide freely therein; the supporting tube 70 contains the top and lower holes 73 and 74 on a first side, two apertures 72 on the first and third sides, and two pin holes 75 symmetrically sited on the first and third sides, while one is below the lower hole 74 .
- the second sleeve member 60 is installed on the top of the supporting tube 70 and has two slightly protruded projections 62 located at the two opposite sides of the sleeve member's 60 outer surface; the two projections 62 are provided to couple with the two apertures 72 on the upper part of the supporting tube 70 .
- the first locking device 20 comprises a first housing 21 , a first connecting means 22 , a helical spring 23 , and a first locking block 24 .
- the first housing 21 contains an upper portion 210 and a lower portion 214 .
- the upper portion 210 consists of a longitudinal guide groove 212 , a longitudinal retaining groove 211 , and a laterally traversed pin hole 213 such that the pin 14 may be inserted through the lower holes 13 of the first sliding tube 10 and the pin hole 213 to secure the first locking device 20 to the first sliding tube 10 .
- the lower portion 214 contains a lateral tunnel cavity 215 and a smoothly curved portion 218 (see FIGS. 2 A- 7 A).
- the helical spring 23 is laterally provided inside the tunnel opening 215 at the bottom of the first housing 21 to be biased against the first locking block 24 for completing the operation of locking or unlocking it.
- the first locking block 24 is provided to be inserted into the lateral cavity 215 within the lower part of the first housing 21 and contains a projection 240 on a first side, an aperture 241 on a second side, and an opening 245 which is in communication with the side aperture 241 .
- the first connecting means 22 in the form of a curvilinearly deformable steel cable, has two enlargements provided at the two ends.
- One end of the enlargements (not shown) is secured to the handle grip 90 , and the other end 221 is secured into the hollow opening 245 on the first locking block 24 through a path, which starts from the longitudinal retaining groove 211 , the smoothly curved portion 218 , the lateral cavity 215 , and reaches the hollow opening 245 of the first locking block 24 such that the mere pressing of the push button 91 on the handle grip 90 may actuate the first locking device 20 through the movement of the steel cable 22 .
- the second locking device 50 is formed by a second locking housing 50 A, which has an upper portion 51 and a lower portion 52 .
- the upper portion 51 contains a longitudinal groove 511 and two laterally traversed pin holes 512 (these two pin holes serve as the two opening mouths of the laterally penetrated pin tunnel) such that the pin 44 may be inserted through the lower hole 43 of the second sliding tube 40 and the pin holes 512 to secure the second locking device 50 and the second sliding tube 40 together.
- the lower portion 52 consists of a laterally allocated central dent 521 , a circular indentation 523 opened at the walled end of the central dent 521 , a helical spring 53 , a generally cubic shaped locking block 54 , a longitudinal sliding block 55 , and a second connecting means 56 .
- the helical spring 53 is horizontally placed into the laterally disposed central dent 521 at the lower portion 52 of the second housing 50 A and has one end biased against the circular indentation 523 on the walled end of the central dent 521 .
- the generally cubic shaped locking block 54 goes against the helical spring's 53 other end and is horizontally slidable within the central dent 521 at the lower portion 52 of the second locking housing 50 A.
- the locking block 54 contains a frontal lock pin 541 and two triangular projections 542 symmetrically provided at the two opposing board sides of the locking block's 54 outer surface.
- the lock pin 541 is to go into the lower portion 553 of the longitudinal sliding block 55 to facilitate the coupling operation between the two triangular projections 542 and the two V-shaped recesses 555 of the lower portion 553 of the sliding block 55 ; each of the two triangular projections 542 has a lower slope 5421 and an upper slope 5422 .
- the sliding block 55 is longitudinally slidable along the groove 511 of the upper portion 51 of the second locking housing 50 A and during sliding, the sliding block 55 glides itself through the mouth of the horizontally disposed central dent 521 of the lower portion 52 of the second locking housing 50 A.
- the sliding block 55 has an upper portion 551 and a lower portion 553 .
- the upper portion 551 has a protruded groove 552 on top and a longitudinal tracking surface below it.
- the lower portion 553 has a side profile wider than the upper portion 551 and contains a longitudinally deployed rectangular recess 557 and two V-shaped recesses 555 .
- the rectangular recess 557 is provided to communicate with the upper portion 551 , and the two V-shaped recesses 555 are located on the two opposite sides of the sliding block's 55 outer surface; each of the two V-shaped recess 555 has an upper slope 554 and a lower slope 556 .
- the second connecting means 56 in the form of a slim rigid metal section, has a top hook end 561 clung to the guide groove 212 of the first housing 21 of the first locking device 20 and a bottom hook end 562 clung to the arch-shaped hook receiver 552 on the upper portion 551 of the sliding block 55 .
- the retraction of the first sliding tube 10 into the second sliding tube 40 is accomplished because the projection 240 of the locking block 24 is biased by the spring 23 to engage with the lower hole 47 of the second sliding tube 40
- the retraction of the second sliding tube 40 into the supporting tube 70 is achieved because the bottom of the first locking device 20 is biased against the top of the sliding block 55 of the second locking device 50 and thus incurs the first end 5411 of the lock pin 541 of the locking block 54 (see FIG. 2A) to engage with the lower hole 74 of the supporting tube 70 .
- the luggage handle is locked at its retracted position.
- the engagement of the locking pin 541 to the lower hole 74 of the supporting tube 70 does not mean the handle is fully locked.
- the reason for this is that, at the initial stage of the locking device, i.e., when neither the first nor the second sliding tube is protracted, the bottom of the first locking device 20 is biased against the top of the longitudinal sliding block 55 of the second locking device 50 and thus pushes it down to descend over the exact mating position which leads to a full locking of the lock pin 541 provided on the locking block 54 . Therefore, only the first end 5411 of the lock pin 541 of the locking block 54 is induced to engage with the lower hole 74 of the supporting tube 70 .
- the user's grasp of the handle grip 90 and raising of the first sliding tube 10 causes the lateral locking block 54 to be fully engaged into the lower hole 74 of the supporting tube 70 .
- the bottom of the first locking device 20 is separated from the top of the second locking device 50 . Since, at this moment, the top of the sliding block 55 is no longer biased by the bottom of the first locking device 20 , and the sliding block 55 itself is vertically slidable on the second locking device 50 in the first place, the incurred ascent of the sliding block 55 causes the locking block 54 to be pushed to the further right direction (see the right half of FIG.
- the user chooses to keep on pressing the push button 91 and continues to pull up the first sliding tube 10 when the locking block 24 slips over the center hole 46 of the second sliding tube 40 , then the first sliding tube 10 keeps on gliding upward until the locking block's 24 guide pin 240 reaches the top hole 45 .
- the user has two choices: if the user chooses to release the push button 91 , then the first sliding tube 10 is once more relocated to its second height position when the locking block's 24 guide pin 240 is engaged into the top hole 45 (see FIGS. 4 A and 4 B); this accomplishes the retractable luggage handle locking device's second protraction height option.
- the first sliding tube 10 keeps on gliding upward until the longitudinal sliding block 55 of the second locking device 50 is incurred to move upward.
- the distance DELTA1 Since the escalating distance the first locking device 20 travels during this very short time period between the two engaging instants, when the locking block's 24 guide pin 240 passes through the top hole 45 of the second sliding tube 40 and when the second connecting means' 56 top hook end 561 hits the upper platform of the first locking device 20 may present a great significance in the forthcoming discussion, it is therefore denoted here as the distance DELTA1.
- the second connecting means 56 is a slim rigid metal section with a bottom hook end 562 clung to the arch-shaped hook receiver 552 on the upper portion 551 of the sliding block 55 , and also because there is a small distance left between the contacting spot of the first locking device 20 and the second connecting means 56 and the clashing position of the first locking device 20 and the first sleeve member 30 , the sliding block 55 will move upward a small distance if the user keeps on lifting the first sliding tube 10 until the lifting action is stopped by the mutual engagement of the first locking device 20 and the first sleeve member 30 .
- the lifting span of the sliding block 55 from its initial standstill position to its later modestly lifted position exactly equals the distance between the locus of the top edge of the first locking device's 20 lower portion 214 when the first locking device 20 hits the second connecting means 56 at their tops and the bottom end position of the first sleeve member 30 at that same instant. Since this distance may also present great significance in our forthcoming discussion, it is hereby represented as the distance DELTA2.
- the sliding block's 55 lifting reaction also causes the second end 5412 of the lock pin 541 of the second locking device 50 to move to the right to unlock itself from the lower hole 74 of the supporting tube 70 (see FIGS. 5A and 5B). Since the user's first pressing of the push button 91 on top of the luggage handle 90 , the second sliding tube 40 , even though originally not completely locked inside the supporting tube 70 due to the initial semi-engagement of the lock pin 541 to the tube's lower hole 74 , has always remained at the same lowermost position inside the supporting tube 70 . However, with the relief of the lock pin 541 in the second locking device 50 from the lower hole 74 of the supporting tube 70 , the second sliding tube 40 now also becomes maneuverable.
- the coupled action of the first sliding tube 10 and the second sliding tube 40 contains several important features which later prove to be very useful for the handle locking mechanism's follow-up movement.
- the main body of the second locking device 50 although initially enacted by the upward dragging force evolved from the elevation of the first locking device 20 and the incurred tension of the rigid second connecting means 56 , is not now induced by the dragging force passed from the top end of the second connecting means 56 but by the constant withdrawal of the locking block 54 of the second locking device 50 , during which time the rigid second connecting means 56 is not strained.
- the lower slope 5421 of the locking block's 54 triangular shaped side protrusion leans against the lower slope 556 of the triangular shaped indentation provided at the lower portion 553 of the longitudinal sliding tube 55 , which also means the locking block 54 of the second locking device 50 is squeezed by the spring 53 and confined inside the very limited cross sectional space of the supporting tube 70 .
- the suppressed locking block 54 pushed by the compressed helical spring 53 , will instantly move toward the opening and exit the top hole 73 as far as the limiting frame behind the lock pin 541 allows.
- the longitudinal sliding block 55 will descend to its initial non-displaced position w.r.t.
- the locking block's 54 triangular shaped two protrusion sides 5422 and 5421 now match precisely with the upper and lower sides 554 and 556 , respectively, of the triangle shaped indentation provided at the lower portion 553 of the longitudinal sliding tube 55 .
- the downward action of the first locking device 20 is only affected by the second connecting means' 56 top hook end's 561 downward dragging force when the second connecting means' 56 top hook end 561 is in contact with the top platform of the first locking device 20 , yet the momentum evolved from the sudden descent of the first locking device 20 continues on even after the separation of the first locking device 20 from the second connecting means 56 and this momentum-related inertia further moves the first locking device 20 downward until the locking block's 24 guide pin 240 reaches the second sliding tube's 40 top engagement hole 45 .
- the luggage handle's locking device momentarily is assigned to be at its initial highest protracted position (see FIGS. 7A and 7B), and the luggage's push button stays as non-depressed.
- the first connecting means 22 is strained and pulled up. Since the first connecting means 22 is in the form of a curvilinearly deformable steel cable, the first connecting means 22 ascending action causes the guide pin 240 of the horizontally allocated locking block 24 to retract from the top hole 45 of the second sliding tube 40 and thus releases the first sliding tube 10 from its protractedly locked position. A ground is given to the user to further push down the first sliding tube 10 and retract it into the second sliding tube 40 .
- This further lowering operation of the first sliding tube 10 causes the guide pin 240 of the horizontally-allocated locking block 24 to slip through the center hole 46 of the second sliding tube 40 while the lock pin 541 on the locking block 54 is still protractedly secured to the upper engagement hole 73 of the supporting tube 70 .
- the guide pin 240 is immediately launched by the compressed spring 23 and comes out of the center hole 46 of the second sliding tube, which accomplishes the retractable luggage handle locking device's fourth protraction height option. Since the reaction is a lowering operation for the first sliding tube 10 , the luggage handle's fourth height option is uprightly shorter than its third height option but is taller than the second height option.
- the guide pin 240 of the horizontally allocated locking block 24 slips over the center hole 46 of the second sliding tube 40 and continues to descend while the lock pin 541 on the locking block 54 is still protruded at the upper hole 73 of the supporting tube 70 .
- the bottom of the first locking device 20 comes into contact with the top of the sliding block 55 .
- the lower portion 214 of the first locking device 20 then pushes down the top of the sliding block 55 to cause the upper slopes 554 of the sliding block 55 to press against the upper slopes 5422 of the triangular projections 542 , thus pulling in the lock pin 541 of the second locking device 50 from the upper hole 73 of the supporting tube 70 .
- the second sliding tube 40 With the release of the engagement pin 541 from the upper hole 73 of the supporting tube 70 , the second sliding tube 40 is free to be retracted into the supporting tube 70 , and if the user chooses to push down the first sliding tube 10 and the second sliding tube 40 all the way down to their respective lower hole positions, the locking device eventually returns to its initial fully retracted location (as seen in FIGS. 2A and 2B). Thus, the cycle of the protraction-retraction operation is completed.
- the first locking device 20 is a primary component and the second locking device 50 is a supplementary component in the luggage handle's locking mechanism.
- the number of the second locking devices 50 and the number of the second sliding tubes 40 may be increased. As a result, it is possible to produce luggage handle systems having a plurality of constituent tubes along with their adjoining locking devices, resulting in a great variety of luggage handle protraction heights.
- the provision of the cable 56 and the center hole 46 of the second sliding tube 40 may be omitted if the design requirement does not include the pre-assigned first protraction height of the luggage handle, which is a small lifting length that allows the luggage handle to be extended a small distance on top of the luggage body to accommodate the smooth undertaking of a minor loading situation.
- the length of the elongated upper portion 210 of the first locking device 20 is designed to be longer than the length of the first sleeve member 30 . This is especially designed to strengthen the connection between the first sliding tube 10 and the second sliding tube 40 , because often this spot turns out to be the Achilles' heel for luggage handle design.
- the second locking device 50 it is important to note that the most crucial innovation in the present invention is with the second locking device 50 . If, for example, the second locking device 50 is not provided, then, in order to maintain the multi-stroke handle system's normal function, another locking device very similar to the present first locking device 20 may have to be employed instead. With the addition of another locking device 20 to replace the present second locking device 50 , not only must the handle system include two independent control chains fitted into one tiny space, but also the user may have to press the two separate control buttons twice to achieve the luggage handle's protraction-retraction operation. By using such a design, the luggage handle's locking mechanism becomes clumsy, complicated, and easy to malfunction.
- the second locking device 50 is simplified to comprise only the two housings 51 and 52 , one horizontally allocated spring 53 , one horizontally deployed locking block 54 , a longitudinal sliding block 55 , and a second connecting means 56 .
- the uprightly located sliding block 55 , the lateral locking block 54 , and the second connecting means 56 are actually the three threshold elements within the second locking device 50 .
- the upper and the lower slopes 5421 and 5422 of the locking block 54 engage, respectively, against the upper slope 554 and the lower slope 556 of the sliding block 55 .
- top and the bottom hook ends 561 and 562 of the second connecting means 56 attached, respectively, to the guide groove 212 on the first housing 21 and the protruded groove 552 on the upper portion 551 of the sliding block 55 , the locking functions as described above are accomplished.
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- Handcart (AREA)
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
Abstract
A handle assembly of luggage comprised of a handle grip with a push button, two first sliding tubes, at least one pair of second sliding tubes, two supporting tubes, two first locking devices, each provided below each first sliding tube, at least one pair of second locking devices, each provided below each second sliding tube, a pair of first connecting means attached between the handle grip and the first locking devices, and at least one pair of the second connecting means for controlling the second locking devices. The length of the fully extended handle is expected to be longer than the height of the luggage body so as to provide the user with a luggage handle which can be extended to a sufficient height to meet the user's various towing needs.
Description
- Reference is made to pending application (Attorney Docket No. 890.003.018), entitled LOCKING DEVICE WITH IMPROVED JUMPING MEANS FOR RETRACTABLE HANDLE OF LUGGAGE, assigned to the assignee of this application and filed on even date herewith.
- 1. Field of the Invention
- The present invention relates to a retractable handle of luggage and more particularly to a locking device for a retractable handle of luggage.
- 2. Description of Related Art
- Conventionally, a retractable luggage handle uses a single-stroke locking device and is equipped with only one locking device to control the luggage handle's movement. This one locking device is usually installed at the bottom of a single sliding tube and is provided as a medium element between the one sliding tube and a supporting tube. However, it is possible to design the locking device's sliding tube in such a manner that the engagement between the sliding tube and the supporting tube is done through a plurality of retaining slots provided on the supporting tube. As a result, more height options are created for the retractable handle. Conventionally, the length of an extendable luggage handle, which precedes the full height of an upright luggage should be no taller than the height of the luggage case itself. Warsaw Convention also stipulates the permissible maximum dimensions for carry-on luggage. Therefore, the total bulk height of an upright luggage body, plus the extra height spanned by a fully extended luggage handle, should still be shorter than the straight-line distance measured from the draping fingertips of a naturally-posed, standing individual to the ground. This means that the user is often urged to bend his/her back to reach the luggage handle in order to get hold of the luggage. It is obvious that the conventional design is not a handy design for most users.
- Moreover, in order for the user to move his/her luggage in and out of luggage storage areas inside an airplane or an automobile, the user often needs to retract the handle to its lowest position to perform a smooth loading task. Since, in the conventional design, there is only one retraction stroke provided on the locking device of the luggage handle, the lowest position of the handle grip also means the closure of the sliding tube to the supporting tube of the luggage handle. That is to say, no allowance is ever given between the user's handhold position and the luggage body when the user is trying to partially retract the handle and move it to the luggage storage space in a transportation vehicle. Such a luggage handle's on-the-run positioning leads to an unfavorable physical placement of the luggage body, which in turn causes the center line of the luggage handle grip to be tilted away from the center line of the luggage body when the luggage is lifted. In other words, the lower portion of the luggage will come nearer to the user than the top portion thereof. Thus, the unfavorable physical position of a dangling piece of luggage interferes with the user's physical movement.
- It is therefore an objective of the present invention to produce a multi-stroke locking device for the retractable handle of a luggage piece in order to minimize the problems which were encountered in the prior art.
- Another objective of the present invention is to produce a locking device for the retractable handle of a luggage piece, wherein the mechanical structure of the new locking device is generally simplified so as to effect a quick assembly in the manufacturing process.
- It is still another objective of the present invention to produce a locking device for the retractable handle of a luggage piece, wherein the handle grip can be raised a small distance in height from its bezel recess located on top of the luggage and also be locked there so as to be used as a carry-on handle for the luggage for the possibility of tilting when it is lifted. Consequently, such a new design will improve the luggage's balance when the user is attempting to use as a carry-on handle.
- To achieve the above mentioned and other objectives, the present invention embodies a handle system for the luggage which comprises two symmetrically identical portions, each having a handle grip and a push button thereon, a first sliding tube affixed to the end of the handle grip, a first locking device detachably attached to the bottom of the first sliding tube, a second sliding tube with a plurality of holes drilled upon it for allowing the first sliding tube to glide freely therein, a second locking device detachably attached to the bottom of the second sliding tube, a supporting tube with a plurality of holes drilled upon it for allowing the second sliding tube to glide freely therein, and a first connecting means linked between the push button and the first locking device; wherein the second locking device comprises an upper portion, a lower portion, a sliding block longitudinally slidable within the upper portion, a spring laterally biased in the lower portion, a locking block laterally slidable within the lower portion, and a second connecting means having the top end clung to the first locking device and the bottom end clung to the longitudinally allocated sliding block.
- The above and other objectives, features, and advantages of the present invention will become apparent from the following detailed description made in conjunction with the accompanying drawings.
- FIG. 1 is an exploded view of a preferred embodiment of a locking device for the retractable handle of luggage according to the invention;
- FIGS. 2A and 2B are first and second sectional views showing the retracted positions of the fully retracted handle, respectively;
- FIGS. 3A and 3B are similar to FIGS. 2A and 2B, respectively, where the push button is pressed to cause the handle grip to be pulled up a small distance from the bezel recess located on top of the luggage and be fixedly locked thereat;
- FIGS. 4A and 4B are similar to FIGS. 3A and 3B, respectively, where the push button is again pressed to cause the handle grip to be pulled up again so that the first locking device is locked into the upper hole of the second sliding tube and the second locking device is locked into the lower hole of the supporting tube;
- FIGS. 5A and 5B are similar to FIGS. 4A and 4B, respectively, where the push button is pressed again to cause the handle grip to be further pulled up so that the first locking device is cleared from the upper hole of the second sliding tube, and the second locking device is moved up;
- FIGS. 6A and 6B are similar to FIGS. 5A and 5B, respectively, where the second locking device is locked into the upper hole of the supporting tube so as to pull the second locking device in an extension position, and the first locking device is pull by the steel cable and retracted into the second sliding tube;
- FIGS. 7A and 7B are similar to FIGS. 6A and 6B respectively, where the handle is fully extended and locked; and
- FIGS. 8A and 8B are similar to FIGS. 7A and 7B, respectively, where the first locking device is retracted into the second sliding tube by pressing the push button so that the bottom of the first locking device is engaged with the top of the second locking device, wherein the lock pin of the second locking device is not fully extended such that the second locking device is suppressed by the first locking device to clear the second locking device from the upper hole of the supporting tube.
- FIG. 1 shows a multi-stroke locking device for the retractable handle of a luggage piece constructed in accordance with the present invention, wherein the handle system is provided at the back of the luggage with a handle grip retractable to a recess located on top of the luggage.
- Note that since the present handle assembly is bilaterally symmetric, the description on one side of the handle system serves to speak for both the entities. The handle system of the present invention comprises a first
sliding tube 10, afirst locking device 20, afirst sleeve member 30, a secondsliding tube 40, asecond locking device 50, asecond sleeve member 60, and a supportingtube 70. The firstsliding tube 10 has alower hole 13 and anupper hole 12; theupper hole 12 is connected to the receiving opening on one side of the handle grip (not shown) by a known fastener. Thefirst locking device 20 is detachably attached to the bottom of the firstsliding tube 10. The secondsliding tube 40 is provided to allow the first slidingtube 10 to glide freely therein and contains the top, middle, andlower holes apertures 42 on the first and third sides, and twopin holes 43 on a second and fourth side. Thefirst sleeve member 30 is fitted to the top of the secondsliding tube 40 and has two slightlyprotruded projections 32 located at the two opposite sides of the sleeve member's 30 outer surface; the twoprojections 32 are provided to couple with the twoapertures 42 of the secondsliding tube 40. Thesecond locking device 50 is detachably attached to the bottom of the secondsliding tube 40 and is secured to the secondsliding tube 40 by apin 44. The supportingtube 70 is provided to allow the secondsliding tube 40 to glide freely therein; the supportingtube 70 contains the top andlower holes apertures 72 on the first and third sides, and twopin holes 75 symmetrically sited on the first and third sides, while one is below thelower hole 74. Thesecond sleeve member 60 is installed on the top of the supportingtube 70 and has two slightlyprotruded projections 62 located at the two opposite sides of the sleeve member's 60 outer surface; the twoprojections 62 are provided to couple with the twoapertures 72 on the upper part of the supportingtube 70. - The
first locking device 20 comprises afirst housing 21, a first connecting means 22, ahelical spring 23, and afirst locking block 24. Thefirst housing 21 contains anupper portion 210 and alower portion 214. Theupper portion 210 consists of alongitudinal guide groove 212, alongitudinal retaining groove 211, and a laterally traversedpin hole 213 such that thepin 14 may be inserted through thelower holes 13 of the first slidingtube 10 and thepin hole 213 to secure thefirst locking device 20 to the first slidingtube 10. Thelower portion 214 contains alateral tunnel cavity 215 and a smoothly curved portion 218 (see FIGS. 2A-7A). Thehelical spring 23 is laterally provided inside thetunnel opening 215 at the bottom of thefirst housing 21 to be biased against thefirst locking block 24 for completing the operation of locking or unlocking it. Thefirst locking block 24 is provided to be inserted into thelateral cavity 215 within the lower part of thefirst housing 21 and contains aprojection 240 on a first side, anaperture 241 on a second side, and anopening 245 which is in communication with theside aperture 241. The first connectingmeans 22, in the form of a curvilinearly deformable steel cable, has two enlargements provided at the two ends. One end of the enlargements (not shown) is secured to thehandle grip 90, and theother end 221 is secured into thehollow opening 245 on thefirst locking block 24 through a path, which starts from thelongitudinal retaining groove 211, the smoothlycurved portion 218, thelateral cavity 215, and reaches thehollow opening 245 of thefirst locking block 24 such that the mere pressing of thepush button 91 on thehandle grip 90 may actuate thefirst locking device 20 through the movement of thesteel cable 22. - The
second locking device 50 is formed by asecond locking housing 50A, which has anupper portion 51 and alower portion 52. Theupper portion 51 contains alongitudinal groove 511 and two laterally traversed pin holes 512 (these two pin holes serve as the two opening mouths of the laterally penetrated pin tunnel) such that thepin 44 may be inserted through thelower hole 43 of the second slidingtube 40 and the pin holes 512 to secure thesecond locking device 50 and the second slidingtube 40 together. Thelower portion 52 consists of a laterally allocatedcentral dent 521, acircular indentation 523 opened at the walled end of thecentral dent 521, ahelical spring 53, a generally cubic shaped lockingblock 54, a longitudinal slidingblock 55, and a second connectingmeans 56. Thehelical spring 53 is horizontally placed into the laterally disposedcentral dent 521 at thelower portion 52 of thesecond housing 50A and has one end biased against thecircular indentation 523 on the walled end of thecentral dent 521. The generally cubic shaped lockingblock 54 goes against the helical spring's 53 other end and is horizontally slidable within thecentral dent 521 at thelower portion 52 of thesecond locking housing 50A. With one end biased against thehelical spring 53, the lockingblock 54 contains afrontal lock pin 541 and twotriangular projections 542 symmetrically provided at the two opposing board sides of the locking block's 54 outer surface. Thelock pin 541 is to go into thelower portion 553 of the longitudinal slidingblock 55 to facilitate the coupling operation between the twotriangular projections 542 and the two V-shapedrecesses 555 of thelower portion 553 of the slidingblock 55; each of the twotriangular projections 542 has alower slope 5421 and anupper slope 5422. - The sliding
block 55 is longitudinally slidable along thegroove 511 of theupper portion 51 of thesecond locking housing 50A and during sliding, the slidingblock 55 glides itself through the mouth of the horizontally disposedcentral dent 521 of thelower portion 52 of thesecond locking housing 50A. The slidingblock 55 has anupper portion 551 and alower portion 553. Theupper portion 551 has a protrudedgroove 552 on top and a longitudinal tracking surface below it. Thelower portion 553 has a side profile wider than theupper portion 551 and contains a longitudinally deployedrectangular recess 557 and two V-shapedrecesses 555. Therectangular recess 557 is provided to communicate with theupper portion 551, and the two V-shapedrecesses 555 are located on the two opposite sides of the sliding block's 55 outer surface; each of the two V-shapedrecess 555 has anupper slope 554 and alower slope 556. The second connectingmeans 56, in the form of a slim rigid metal section, has atop hook end 561 clung to theguide groove 212 of thefirst housing 21 of thefirst locking device 20 and abottom hook end 562 clung to the arch-shapedhook receiver 552 on theupper portion 551 of the slidingblock 55. - The following narrative is a description of the operation procedure for the handle system of the present invention. To provide a proper setting to accommodate the forthcoming discussion, the luggage handle's locking device is initially assumed to be at its dormant retracted position. By making references to the adjoined illustrations FIGS.2A-8A, the following narrative can be best understood.
- Originally, when the
push button 91 is not pressed by the user, thehandle 90 is at its recessed position (see FIGS. 2A and 2B). At this stage, the first slidingtube 10 is retracted into the second slidingtube 40 and the second slidingtube 40 is retracted into the supportingtube 70. While the retraction of the first slidingtube 10 into the second slidingtube 40 is accomplished because theprojection 240 of the lockingblock 24 is biased by thespring 23 to engage with thelower hole 47 of the second slidingtube 40, the retraction of the second slidingtube 40 into the supportingtube 70 is achieved because the bottom of thefirst locking device 20 is biased against the top of the slidingblock 55 of thesecond locking device 50 and thus incurs thefirst end 5411 of thelock pin 541 of the locking block 54 (see FIG. 2A) to engage with thelower hole 74 of the supportingtube 70. Thus, the luggage handle is locked at its retracted position. However, the engagement of thelocking pin 541 to thelower hole 74 of the supportingtube 70, unlike the engagement of theguide pin 240 to thelower hole 47 of the second slidingtube 40, does not mean the handle is fully locked. The reason for this is that, at the initial stage of the locking device, i.e., when neither the first nor the second sliding tube is protracted, the bottom of thefirst locking device 20 is biased against the top of the longitudinal slidingblock 55 of thesecond locking device 50 and thus pushes it down to descend over the exact mating position which leads to a full locking of thelock pin 541 provided on the lockingblock 54. Therefore, only thefirst end 5411 of thelock pin 541 of the lockingblock 54 is induced to engage with thelower hole 74 of the supportingtube 70. - When the
push button 91 is first pressed down by the user, as shown in FIGS. 3A-3B, thecable 22 is instantly strained to move upward to induce compression force to thespring 23, displace the lockingblock 24, and withdraw theguide pin 240 from its initial position at thelower hole 47. This is the disengagement action of the projectedguide pin 240 on the lockingblock 24 from thelower hole 47 of the second slidingtube 40. The handle is then pulled up by the user to cause thelocking block 24, now disengaged from thehole 47, to begin to move from its original position at thelower hole 47 to a second position at thecenter hole 46 on the second sliding tube 40 (see FIG. 3A). Thefirst locking device 20 is therefore relocated to a new elevated position. Concurrently, the user's grasp of thehandle grip 90 and raising of the first slidingtube 10 causes thelateral locking block 54 to be fully engaged into thelower hole 74 of the supportingtube 70. When the user pulls up the first slidingtube 10, the bottom of thefirst locking device 20 is separated from the top of thesecond locking device 50. Since, at this moment, the top of the slidingblock 55 is no longer biased by the bottom of thefirst locking device 20, and the slidingblock 55 itself is vertically slidable on thesecond locking device 50 in the first place, the incurred ascent of the slidingblock 55 causes the lockingblock 54 to be pushed to the further right direction (see the right half of FIG. 1) by the expansion of the horizontally deployedspring 53 and thus induces thelock pin 541 of the lockingblock 54 to be fully extended. In other words, thebottom face 5412 of thelock pin 541 is fully extended to lock itself in place to thelower hole 74 of the supportingtube 70. In such a manner, the lockingblock 54 is entirely locked into thelower hole 74 of the supportingtube 70, and the second slidingtube 40 is also thus fixedly secured in place. At this time, theupper slopes 5422 of thetriangular projections 542 are closely engaged to theupper slope 554 of the sliding block 55 (see the left half of FIG. 1). - Up to this point, if the user chooses to release the
push button 91 when the locking block's 24guide pin 240 reaches thecenter hole 46 of the second slidingtube 40, then followed by the secured allocation of the second slidingtube 40 on the supportingtube 70, the first slidingtube 10 is also relocated when the locking block's 24 guide pin is engaged into thecenter hole 46 of the second sliding tube (see FIGS. 3A and 3B); this accomplishes the retractable luggage handle locking device's first protraction height option. In this manner, a unique purpose of carry-on handle for luggage piece of the present invention is thus attained. However, at this time, if the user chooses to keep on pressing thepush button 91 and continues to pull up the first slidingtube 10 when the lockingblock 24 slips over thecenter hole 46 of the second slidingtube 40, then the first slidingtube 10 keeps on gliding upward until the locking block's 24guide pin 240 reaches thetop hole 45. Here again, the user has two choices: if the user chooses to release thepush button 91, then the first slidingtube 10 is once more relocated to its second height position when the locking block's 24guide pin 240 is engaged into the top hole 45 (see FIGS. 4A and 4B); this accomplishes the retractable luggage handle locking device's second protraction height option. However, if the user chooses to keep on pressing thepush button 91 and continues to pull up the first slidingtube 10 when the lockingblock 24 slips over thetop hole 45 of the second slidingtube 40, then the first slidingtube 10 keeps on gliding upward until the longitudinal slidingblock 55 of thesecond locking device 50 is incurred to move upward. Sometime after the locking block 24 (presently retracted due to the pressing of the push button 91) slips over thetop hole 45 on the second slidingtube 40 and before the moment when the top edge of the first locking device's 20lower portion 214 reaches the bottom end of thefirst sleeve member 30 and is stopped thereat, the second connecting means' 56top hook end 561 comes into engagement with the upper platform of thefirst locking device 20. Since the escalating distance thefirst locking device 20 travels during this very short time period between the two engaging instants, when the locking block's 24guide pin 240 passes through thetop hole 45 of the second slidingtube 40 and when the second connecting means' 56top hook end 561 hits the upper platform of thefirst locking device 20 may present a great significance in the forthcoming discussion, it is therefore denoted here as the distance DELTA1. Since the second connectingmeans 56 is a slim rigid metal section with abottom hook end 562 clung to the arch-shapedhook receiver 552 on theupper portion 551 of the slidingblock 55, and also because there is a small distance left between the contacting spot of thefirst locking device 20 and the second connectingmeans 56 and the clashing position of thefirst locking device 20 and thefirst sleeve member 30, the slidingblock 55 will move upward a small distance if the user keeps on lifting the first slidingtube 10 until the lifting action is stopped by the mutual engagement of thefirst locking device 20 and thefirst sleeve member 30. The lifting span of the slidingblock 55 from its initial standstill position to its later modestly lifted position exactly equals the distance between the locus of the top edge of the first locking device's 20lower portion 214 when thefirst locking device 20 hits the second connecting means 56 at their tops and the bottom end position of thefirst sleeve member 30 at that same instant. Since this distance may also present great significance in our forthcoming discussion, it is hereby represented as the distance DELTA2. - The sliding block's55 lifting reaction also causes the
second end 5412 of thelock pin 541 of thesecond locking device 50 to move to the right to unlock itself from thelower hole 74 of the supporting tube 70 (see FIGS. 5A and 5B). Since the user's first pressing of thepush button 91 on top of theluggage handle 90, the second slidingtube 40, even though originally not completely locked inside the supportingtube 70 due to the initial semi-engagement of thelock pin 541 to the tube'slower hole 74, has always remained at the same lowermost position inside the supportingtube 70. However, with the relief of thelock pin 541 in thesecond locking device 50 from thelower hole 74 of the supportingtube 70, the second slidingtube 40 now also becomes maneuverable. At this time, however, if the user chooses to further pull up the luggage handle, since the top edge of the first locking device's 20lower portion 214 is momentarily clashed with the bottom end of thefirst sleeve member 30 and is stopped thereat (i.e., thefirst locking device 20 and the first slidingtube 10 both have reached their highest stretching limit), the first slidingtube 10 and the second slidingtube 40 together will move upward until the lockingblock 54 of thesecond locking device 50 comes into engagement with thetop hole 73 of the supportingtube 70 and locks itself therein (see FIGS. 6A and 6B). Within this stage of the locking device's movement (i.e., the resulting effect of the user's sole manual action of continuously lifting the luggage's handle grip), before thelock pin 541 of the lockingblock 54 enters theupper hole 73 of the supportingtube 70, the coupled action of the first slidingtube 10 and the second slidingtube 40 contains several important features which later prove to be very useful for the handle locking mechanism's follow-up movement. After the relief of thelock pin 541 of thesecond locking device 50 from thelower hole 74 of the supportingtube 70 and the subsequent physical collision between the top edge of the first locking device's 20lower portion 214 and the bottom end of thefirst sleeve member 30, the first slidingtube 10 moves upward along with the second slidingtube 40 with no mutual relative motion, and the frontal head of thelocking pin 541 is forced to lean against the inner wall of the supportingtube 70 and with its other end severely biased by the compressedhelical spring 53 when thesecond locking device 50 along with the second slidingtube 40 is being pulled up. This suggests that the upward displacement of the longitudinal slidingtube 55 w.r.t. the main body of thesecond locking device 50, although initially enacted by the upward dragging force evolved from the elevation of thefirst locking device 20 and the incurred tension of the rigid second connectingmeans 56, is not now induced by the dragging force passed from the top end of the second connecting means 56 but by the constant withdrawal of the lockingblock 54 of thesecond locking device 50, during which time the rigid second connectingmeans 56 is not strained. Throughout this entire period, if viewed from the side, thelower slope 5421 of the locking block's 54 triangular shaped side protrusion leans against thelower slope 556 of the triangular shaped indentation provided at thelower portion 553 of the longitudinal slidingtube 55, which also means the lockingblock 54 of thesecond locking device 50 is squeezed by thespring 53 and confined inside the very limited cross sectional space of the supportingtube 70. - However, once the frontal head of the
locking pin 541 of the lockingblock 54 meets an opening (in this case, the opening is thetop hole 73 of the supporting tube 70), the suppressed lockingblock 54, pushed by the compressedhelical spring 53, will instantly move toward the opening and exit thetop hole 73 as far as the limiting frame behind thelock pin 541 allows. During this process, the longitudinal slidingblock 55 will descend to its initial non-displaced position w.r.t. the main body of thesecond locking device 50, and if again viewed from the side, the locking block's 54 triangular shaped twoprotrusion sides lower sides lower portion 553 of the longitudinal slidingtube 55. Up to this point, followed by the engagement of thelock pin 541 of the lockingblock 54 to theupper hole 73 of the supportingtube 70, a small distance DELTA2 (as defined earlier in the discussion), which originally was lifted for the purpose of retracting the lockingblock 54 of thesecond locking device 50 from thelower hole 74 on the supportingtube 70, now is lowered again to accommodate a smooth protraction of thelock pin 541 of the lockingblock 54 from theupper hole 73 of the supportingtube 70. Nevertheless, remember that before the actual occurrence of the lifting action of the small distance DELTA2, another small distance ascent DELTA1 was also lifted by the user; that elevation was for allowing the second connecting means' 56top hook end 561 to contact the upper platform of thefirst locking device 20 sometime after the locking block's 24guide pin 240 slips over thetop hole 45 of the second slidingtube 40. Perceivably, the engagement of the lockingblock 54 of thesecond locking device 50 to thetop hole 73 of the supportingtube 70 does not guarantee another engagement of the first locking device's 20locking block 24 to thetop hole 45 of the second slidingtube 40. By studying the relative positions among thefirst locking device 20, thefirst sleeve 30, and the engagement holes' 47, 46, and 45 respective loci on the second slidingtube 40, after the engagement of the lockingblock 54 of thesecond locking device 50 to thetop hole 73 of the supportingtube 70, there is still another small distance DELTA1 which needs to be descended by the first slidingtube 10 to facilitate a second engagement of the first locking device's 20locking block 24 to thetop hole 45 of the second sliding tube 40 (see FIGS. 6A and 6B). - The descent of the longitudinal sliding
block 55 to its original non-displaced position on thesecond locking device 50 does not incur a whole bulk descent of thesecond locking device 50, yet the longitudinal small drop of the slidingblock 55 does incur a sudden descent of thefirst locking device 20 through the actuation of a downward dragging force induced by the second connecting means' 56 descent (because the second connecting means' 56bottom hook end 562 is clung to the longitudinal sliding block's 55 arch-shapedhook receiver 552 and itstop hook end 561 is clung to the top of the first locking device 20). Although the downward action of thefirst locking device 20 is only affected by the second connecting means' 56 top hook end's 561 downward dragging force when the second connecting means' 56top hook end 561 is in contact with the top platform of thefirst locking device 20, yet the momentum evolved from the sudden descent of thefirst locking device 20 continues on even after the separation of thefirst locking device 20 from the second connectingmeans 56 and this momentum-related inertia further moves thefirst locking device 20 downward until the locking block's 24guide pin 240 reaches the second sliding tube's 40top engagement hole 45. At this time, since the push button is not pressed, the first connectingmeans 22 is therefore not activated, and the release of the lockingblock 24 out of the second sliding tube's 40top engagement hole 45 from the sudden expansion of the compressedhelical spring 23 is not in any way obstructed. As a result, the needed descent of another small distance DELTA1 of the first slidingtube 10, a smooth protraction of the locking block's 24guide pin 240 at thetop hole 45 of the second slidingtube 40, and the retractable luggage handle locking device's third protraction height option are all accomplished (see FIGS. 7A and 7B). When the luggage handle is placed in a fully extended position, owing to the locking device's multi-stroke design feature, it can accommodate even the tallest user, allowing them to tow the luggage in considerable comfort. - The following is a description of the luggage handle's retraction operation. The luggage handle's locking device momentarily is assigned to be at its initial highest protracted position (see FIGS. 7A and 7B), and the luggage's push button stays as non-depressed. When the user presses the push button, however, the first connecting
means 22 is strained and pulled up. Since the first connectingmeans 22 is in the form of a curvilinearly deformable steel cable, the first connectingmeans 22 ascending action causes theguide pin 240 of the horizontally allocated lockingblock 24 to retract from thetop hole 45 of the second slidingtube 40 and thus releases the first slidingtube 10 from its protractedly locked position. A ground is given to the user to further push down the first slidingtube 10 and retract it into the second slidingtube 40. This further lowering operation of the first slidingtube 10 causes theguide pin 240 of the horizontally-allocatedlocking block 24 to slip through thecenter hole 46 of the second slidingtube 40 while thelock pin 541 on the lockingblock 54 is still protractedly secured to theupper engagement hole 73 of the supportingtube 70. At this time, if the user chooses to release the push button, theguide pin 240 is immediately launched by thecompressed spring 23 and comes out of thecenter hole 46 of the second sliding tube, which accomplishes the retractable luggage handle locking device's fourth protraction height option. Since the reaction is a lowering operation for the first slidingtube 10, the luggage handle's fourth height option is uprightly shorter than its third height option but is taller than the second height option. However, if the user chooses to continue pressing the handle's button and meanwhile pushes further down the first slidingtube 10, theguide pin 240 of the horizontally allocated lockingblock 24 slips over thecenter hole 46 of the second slidingtube 40 and continues to descend while thelock pin 541 on the lockingblock 54 is still protruded at theupper hole 73 of the supportingtube 70. At this time, the bottom of thefirst locking device 20 comes into contact with the top of the slidingblock 55. Thelower portion 214 of thefirst locking device 20 then pushes down the top of the slidingblock 55 to cause theupper slopes 554 of the slidingblock 55 to press against theupper slopes 5422 of thetriangular projections 542, thus pulling in thelock pin 541 of thesecond locking device 50 from theupper hole 73 of the supportingtube 70. With the release of theengagement pin 541 from theupper hole 73 of the supportingtube 70, the second slidingtube 40 is free to be retracted into the supportingtube 70, and if the user chooses to push down the first slidingtube 10 and the second slidingtube 40 all the way down to their respective lower hole positions, the locking device eventually returns to its initial fully retracted location (as seen in FIGS. 2A and 2B). Thus, the cycle of the protraction-retraction operation is completed. - In the preferred embodiment the
first locking device 20 is a primary component and thesecond locking device 50 is a supplementary component in the luggage handle's locking mechanism. Thus in other embodiments, the number of thesecond locking devices 50 and the number of the second slidingtubes 40 may be increased. As a result, it is possible to produce luggage handle systems having a plurality of constituent tubes along with their adjoining locking devices, resulting in a great variety of luggage handle protraction heights. - Note that the provision of the
cable 56 and thecenter hole 46 of the second slidingtube 40 may be omitted if the design requirement does not include the pre-assigned first protraction height of the luggage handle, which is a small lifting length that allows the luggage handle to be extended a small distance on top of the luggage body to accommodate the smooth undertaking of a minor loading situation. - Also note that the length of the elongated
upper portion 210 of thefirst locking device 20 is designed to be longer than the length of thefirst sleeve member 30. This is especially designed to strengthen the connection between the first slidingtube 10 and the second slidingtube 40, because often this spot turns out to be the Achilles' heel for luggage handle design. - It is important to note that the most crucial innovation in the present invention is with the
second locking device 50. If, for example, thesecond locking device 50 is not provided, then, in order to maintain the multi-stroke handle system's normal function, another locking device very similar to the presentfirst locking device 20 may have to be employed instead. With the addition of anotherlocking device 20 to replace the presentsecond locking device 50, not only must the handle system include two independent control chains fitted into one tiny space, but also the user may have to press the two separate control buttons twice to achieve the luggage handle's protraction-retraction operation. By using such a design, the luggage handle's locking mechanism becomes clumsy, complicated, and easy to malfunction. In the preferred embodiment, thesecond locking device 50 is simplified to comprise only the twohousings spring 53, one horizontally deployed lockingblock 54, a longitudinal slidingblock 55, and a second connectingmeans 56. Amongst them, the uprightly located slidingblock 55, thelateral locking block 54, and the second connecting means 56 (perhaps in the form of a slim rigid metal section) are actually the three threshold elements within thesecond locking device 50. As stated above, the upper and thelower slopes block 54 engage, respectively, against theupper slope 554 and thelower slope 556 of the slidingblock 55. Also, with the top and the bottom hook ends 561 and 562 of the second connecting means 56 attached, respectively, to theguide groove 212 on thefirst housing 21 and the protrudedgroove 552 on theupper portion 551 of the slidingblock 55, the locking functions as described above are accomplished. - While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.
Claims (9)
1. A handle assembly of wheeled luggage provided on a back portion of the luggage, the luggage having:
a handle with a handle grip (90) having opposing ends and a push button (91) located between the ends and operable at a first position and a second position;
a pair of first sliding tubes (10) connected to the respective ends of the handle grip;
a pair of second sliding tubes (40), slidably engaged with the first sliding tubes (10) for allowing the respective first sliding tubes to slide therein; and
a pair of supporting tubes (70), slidably engaged with the second tubes (40) for allowing the second tubes to slide therein when the handle is pulled upward to a used position and pushed downward to a stored position, said assembly comprising:
a pair of first locking devices (20) operatively connected to the push button (91); and
a pair of second locking devices (50), engaged with the respective supporting tubes (70), for securing the second tubes (40) to the respective supporting tubes (70) in a locked position when the handle is operated in the stored position, wherein the second locking devices (50) are operatively connected to the respective first locking devices (20) for allowing the first locking devices (20) to release the respective second locking devices (50) from the locked position when the push button is operated in the first position.
2. The handle assembly of claim 1 , wherein each of the supporting tubes (70) has a hole (74) and each of the second locking devices (50) has a locking pin (541) for engaging with the hole (74) in the respective supporting tube when the second locking devices are operated in the locked position, and disengaged from the hole (74) when the second locking devices are released from the locked position.
3. The handle assembly of claim 2 , wherein each the second locking devices (50) further comprises a sliding block (55) located adjacent to and operatively engaged with the respective locking pin (541), and wherein the sliding block (55) is connected to the respective first sliding tube (10) by a connecting means (56) for pulling the sliding block away from the respective locking pin (541), thereby causing the locking pin (541) to disengaged from the hole (74) when the handle is pulled upward to the used position.
4. The handle assembly of claim 3 , wherein each of the first locking devices has a guiding pin (240) which can be engaged with an aperture (47) on the respective second sliding tube (40) in a securing position to prevent the handle from being pulled upward when the push button is operated in the second position, and wherein the guiding pin (24) is disengaged from the aperture (47) when the push button is operated in the first position.
5. The handle assembly of claim 4 , wherein each of the first locking devices is operatively connected to the push button by a further connecting means (22) for disengaging the guiding pins (24) from the respective aperture (47) when the push button is operated in the first position.
6. The handle assembly of claim 5 , wherein each of the second sliding tubes (40) further having a further aperture (45) for engaging with the respective guiding pin (240) to secure the first sliding tube (10) to the respective second sliding tube (40) when the handle in operated in the used position.
7. The handle assembly of claim 4 , wherein each of the supporting tubes (70) further having a further hole (73) for engaging with the respective locking pin (541) to secure the second sliding tube (40) to the respective supporting tube (70) when the handle is operated in the used position.
8. The handle assembly of claim 3 , wherein each of the first locking devices has a guiding pin (240) which can be engaged with an aperture (46) on the respective second sliding tube (40) in a securing position to have the handle used as a carry-on handle and prevent the handle from being further pulled upward when the push button is operated in the second position, and wherein the guiding pin (24) is disengaged from the aperture (46) when the carry-on handle is not used and the push button is operated in the first position.
9. The handle assembly of claim 2 , wherein each of the second locking devices (50) further comprises a sliding block (55) located adjacent to and operatively engaged with the respective locking block (54), and wherein the sliding block (55) has a rectangular recess and two V-shaped recesses located on two opposing sides of the rectangular recess, each V-shaped recess having an upper slope and a lower slope, and wherein the locking block (54) has two triangular projections, each triangular projection having a lower slope and an upper slope, which are provided on the two opposing outer surfaces of the locking block (54), for laterally coupling with the upper slope and the lower slope of the V-shaped recesses of the lower portion of the longitudinal sliding block, when the push button is operated in the first and second positions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/904,489 US20030009848A1 (en) | 2001-07-13 | 2001-07-13 | Locking device for retractable handle of luggage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US09/904,489 US20030009848A1 (en) | 2001-07-13 | 2001-07-13 | Locking device for retractable handle of luggage |
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US20030009848A1 true US20030009848A1 (en) | 2003-01-16 |
Family
ID=25419246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/904,489 Abandoned US20030009848A1 (en) | 2001-07-13 | 2001-07-13 | Locking device for retractable handle of luggage |
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US (1) | US20030009848A1 (en) |
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US11986072B2 (en) | 2019-01-03 | 2024-05-21 | Tumi, Inc. | Zipper cover arrangement for luggage and bags |
-
2001
- 2001-07-13 US US09/904,489 patent/US20030009848A1/en not_active Abandoned
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US20100251517A1 (en) * | 2009-04-01 | 2010-10-07 | Wei-Hung Lai | Control handle of a retractable handle assembly for travel bag |
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US11912174B2 (en) | 2018-05-24 | 2024-02-27 | Wonderland Switzerland Ag | Support base for a child safety seat |
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US20210362630A1 (en) * | 2018-05-24 | 2021-11-25 | Wonderland Switzerland Ag | Support Base For A Child Safety Seat |
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US11097639B2 (en) | 2018-05-24 | 2021-08-24 | Wonderland Switzerland Ag | Support base for a child safety seat |
CN110525293A (en) * | 2018-05-24 | 2019-12-03 | 明门瑞士股份有限公司 | Support base for child safety seat |
US11986072B2 (en) | 2019-01-03 | 2024-05-21 | Tumi, Inc. | Zipper cover arrangement for luggage and bags |
US11700950B2 (en) | 2019-04-28 | 2023-07-18 | Inno-Sports Co., Ltd. | Adjustable support and bed frame having same |
US11330900B2 (en) | 2019-08-30 | 2022-05-17 | Inno-Sports Co., Ltd. | Auto-locking adjustable bar and structure having same |
US10939751B1 (en) | 2019-08-30 | 2021-03-09 | Inno-Sports Co., Ltd. | Adjustable bar, leg assembly and table having same |
US11523683B2 (en) | 2020-04-23 | 2022-12-13 | Inno-Sports Co., Ltd. | Blow-molded unitary structure with enhanced strength |
US11524812B2 (en) | 2020-04-28 | 2022-12-13 | Inno-Sports Co., Ltd. | Blow-molded unitary structure with enhanced strength |
US11564492B2 (en) | 2020-07-27 | 2023-01-31 | Inno-Sports Co., Ltd. | Blow-molded unitary structure with enhanced strength |
US11937696B2 (en) | 2020-07-27 | 2024-03-26 | Inno-Sports Co., Ltd. | Blow-molded unitary structure with enhanced strength |
US11564494B2 (en) | 2020-07-27 | 2023-01-31 | Inno-Sports Co., Ltd. | Blow-molded unitary structure with enhanced strength |
US11937695B2 (en) | 2021-11-01 | 2024-03-26 | Inno-Sports Co., Ltd. | Height-adjustable folding table |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CHAW KHONG TECHNOLOGY CO. LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KUO, CHUNG-HSIEN;REEL/FRAME:011999/0801 Effective date: 20000808 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |