Exemplary embodiments of the present inventive concept relate to a travel bag. More particularly, exemplary embodiments of the present inventive concept relate to a travel bag having enhanced stability, steerability and user convenience.
A travel bag, which is used to receive and protect objects, generally includes wheels and a handle. Generally, the travel bag may have a rectangular shape to maximize a storage efficiency and for a convenience of a shipment. For example, an international standard for the travel bag to be carried into airplane cabins, requires that the travel bag should have the rectangular shape having a length, a width and a height. The travel bag may have plural wheels (e.g., four wheels each of which is at each corner of a rectangular-shaped bottom surface, but not limited thereto). The wheels are placed under a bottom surface of the bag that is generally defined by the length and the width and usually positioned to be close and parallel to a ground plane. In consideration of a position of a user's hand, the height of the travel bag, which is perpendicular to the bottom surface, may be designed to be longer than the length and the width. The travel bag generally also has a handle positioned along a direction of the height. Recently, wheels pivotable 360 degrees around an axis perpendicular to the ground are often adopted for the travel bag (as shown in
If a user of the travel bag is right-handed, he or she may place the travel bag in his or her right front position (or in his or her left front position if the user being left-handed) to have its height be perpendicular to the ground and all of its wheels be contact to the ground (hereinafter, “a vertical status”). Then, if the user wants to move the travel bag in a desired direction, the user may apply a horizontal force to the handle of the travel bag. In this case (i.e., when the travel bag is moved in the vertical status, without being inclined), since the handle is usually disposed in an uppermost position along the height direction, the travel bag may be shaken back and forth along its moving direction and may be fallen down by an obstacle on the ground due to an unbalanced moment of force generated by a weight of the travel bag and the applied horizontal force.
Thus, if the ground is uneven or the user wants to move the bag fast, it may be better for the user to move the bag in an inclined status, in which the travel bag and its handle are inclined towards the user so that only some of its wheels (i.e., only the wheels disposed directly under the handle) are contact to the ground. In this case, a possibility of falling down of the moving travel bag may be somewhat reduced.
However, even in the inclined status, for example, when the ground is uneven, an unbalanced moment due to different levels of the wheels on the uneven ground may be still generated in a direction perpendicular to the moving direction of the travel bag so that the travel bag still may be shaken from side to side. In particular, when the user moves the travel bag fast on the uneven ground, the travel bag may be easily flipped or fallen down due to the unbalanced moment. In addition, if the user changes the moving direction while moving the travel bag fast, the travel bag may be more easily flipped or fallen down due to the unbalanced moment generated by a centrifugal force in the direction perpendicular to the moving direction of the travel bag.
Another problem may occur when the travel bag is moved in the inclined status. It is that although the wheels of the travel bag are originally designed to be rotatable 360 degrees around an axis perpendicular to the ground, in the inclined status, the axis of each wheel being contact to the ground (e.g., each of two wheels disposed directly under the handle) may be fixed so that the wheels being contact to the ground may not freely rotate in various directions. Thus, even though an external force is applied in a direction (e.g. an X axis direction) perpendicular to the moving direction (e.g. an Y axis direction), the wheels on the ground may not rotate in various directions and a steerability of the travel bag may be limited due to a frictional force. It may be a serious constraint for a user moving the travel bag.
In a narrow aisle, if the user disposes the travel bag in front of the user in the vertical status and moves the bag by pushing it with the horizontal force, the travel bag may be bumped into the user's feet. Generally, a width of the aisle is too narrow for the user to dispose and move the travel bag in a lateral side of the user. If the user disposes the travel bag in his or her rear side and pulls the travel bag in the inclined status along the narrow aisle, as discussed above, rotation and a moving direction of each wheel may be limited to deteriorate the steerability of the travel bag. In this case, the travel bag may be bumped into seats disposed in both sides of the aisle, which prevents the user from moving the bag forward. Eventually, the user should lift the heavy travel bag up to move it in the narrow aisle so that the user may experience serious inconvenience.
In addition, when the user pulls the travel bag across a step between a sidewalk and a driveway or a step between a sidewalk and a parking lot, a rear surface of the travel bag may be scratched or damaged. Thus, in this situation, the user also should lift up the travel bag to move it.
Furthermore, when the user moves the travel bag in the inclined status, whole weights of the travel bag and the objects included in the travel bag may be loaded onto only two wheels (instead of four entire wheels) which are contact to the ground and onto a hand of the user. When the user moves the travel bag in the inclined status for a long time and thus, a force and a work in a direction of gravity are generated in the inclined status (unlike in the vertical status), the user may suffer from pains on his or her hand, elbow and shoulder.
Exemplary embodiments of the present inventive concept provide a travel bag capable of being inclined in various angles with respect to a ground, while maintaining a state in which the bag is supported by all of wheels regardless of an inclined angle of the travel bag. Exemplary embodiments of the present inventive concept provide a travel bag having wheels rotatable 360 degrees around an axis perpendicular to the ground even in an inclined status, which has enhanced mobility and reduces loads applied on the user's hand and shoulder.
According to one aspect of the present inventive concept provides a travel bag comprising: a frame having at least three wheels attached thereto, each of the wheels being configured to be contact to a ground; a case being configured to have an empty space to receive objects and also being configured to be disposed on the frame; and a pivot axis being located on or above the frame, the pivot axis being defined by two contact points or a contact line connecting the case and the frame. The case disposed on the frame is allowed to pivot on the pivot axis to draw a trajectory of an arc or a circle. All of the wheels are configured to be maintained as being continuously contact to the ground, regardless of the case's pivoting around the pivot axis.
According to embodiments of the present inventive concept, the case has a height direction that is disposed perpendicular to the ground when the case is in a vertical status, and the height direction is allowed to be inclined according to the case's pivoting around the pivot axis so that an angle between the height direction and a plane defined by the wheels is allowed to vary. The travel bag further comprises an angle maintaining unit configured to maintain the varied angle between the height direction and the plane, after the case's pivoting around the pivot axis.
According to embodiments of the present inventive concept, the angle maintaining unit has a shape of an arc or a circle whose center is the rotating axis, and the angle maintaining unit has a plurality of recesses or holes formed thereon, each of the recesses having a shape of a part of hollow hemisphere and each of the holes having a shape of hollow cylinder. The travel bag further comprises an adjusting unit, comprising: a protrusion including a tip having a portion of a part of convex hemisphere or a cylinder, the tip being configured to be inserted into a recess or a hole among the plurality of recesses or holes according to the case's pivoting around the pivot axis; and a contact portion configured to be operated either to maintain the tip as being inserted into the recess or hole or to push the tip to be slid out in a direction away from the recess or hole.
According to embodiments of the present inventive concept, the protrusion is disposed at the case, and the angle maintaining unit is coupled to the frame.
According to embodiments of the present inventive concept, the protrusion is disposed at the frame, and the angle maintaining unit is coupled to the case.
According to embodiments of the present inventive concept, the adjusting unit further comprises an elastic member configured to press the protrusion toward the angle maintaining unit.
According to embodiments of the present inventive concept, the protrusion includes a slope surface that is inclined with respect to a direction of a pressure of the elastic member, and the adjusting unit comprises: an operating portion configured to be operated by a user; and an elastic part configured to push the operating portion in a direction that makes the contact portion be located apart from the slope surface of the protrusion. When the user applies a force to the operating portion, the elastic part is pressed so that the contact portion pushes the slope surface of the protrusion.
According to embodiments of the present inventive concept, the adjusting unit further comprises a connecting portion connecting the operating portion and the contact portion, and when the user applies a force to the operating portion downwardly, at least a part of the force is transferred to the connecting portion to cause a leverage effect that makes the contact portion push the slope surface of the protrusion.
According to embodiments of the present inventive concept, the travel bag further comprises a brake disposed at the frame and configured to prevent a rolling of at least one of the wheels. The brake comprises: an elastic element coupled to the frame; a foothold configured to be pressed by the elastic element in an upper direction; and a friction pad configured to make contact to the at least one wheel when the foothold is pressed in a lower direction.
According to embodiments of the present inventive concept, the travel bag further comprises a friction pad configured to make contact to at least one of the wheels to prevent a rolling of the at least one wheel. When the user applies a force to the foothold, the friction pad moves to make contact to the at least one wheel.
According to the exemplary embodiments of the present inventive concept, the case includes a pair of sides facing each other, and an openable part is disposed on each of the sides.
According to the exemplary embodiments of the present inventive concept, the travel bag may be continuously supported by all of its wheels, regardless of whether it is in the vertical status or the inclined status, with no auxiliary additional supporting element. The travel bag may be inclined in various angles with respect to a ground, regardless of whether it moves or stops. All of the wheels of the travel bag can be contact to the ground even in the inclined status and are rotatable in 360 degrees on the ground so that the steerability of the travel bag in the inclined status may be enhanced. Furthermore, even when the travel bag encounters any obstacle or step on the ground while moving fast in the inclined status, the user may make the travel bag easily pass the obstacle or step, without lifting it, by simply adjusting the inclined angle of the travel bag to cause a leverage effect. Thus, the stability of the travel bag may be enhanced.
According to the exemplary embodiments of the present inventive concept, the weight of the travel bag may not be applied to the hand of the user even in the inclined status, and thus, the user's hand, wrist, elbow and shoulder do not need to suffer from pains and damages.
According to the exemplary embodiments of the present inventive concept, the inclined angle of the travel bag may be adjusted to be large enough for a direction of the height of the travel bag (a case of the travel bag) to become to be parallel with the ground (i.e., the case of the bag being disposed along a horizontal direction and the bottom surface of the bag being disposed to be perpendicular to the ground), while all of the wheels being contact to the ground. Thus, to take any object out from the travel bag, the user can make the case of the bag be parallel with the ground (and apart from the ground with some distance), instead of putting the travel bag on the dirty ground and squatting down or bending a waist to find the object, and can easily take the desired object out from the bag, without dropping any other objects from the travel bag.
Hereinafter, the travel bag according to exemplary embodiments of a present inventive concept will be explained in detail with reference to the accompanying drawings.
The travel bag of the present inventive concept may be continuously supported by all of its wheels. The travel bag may be inclined in various angles with respect to a ground when it moves or stops. All of the wheels of the travel bag make contact to the ground even in the inclined status and are rotatable 360 degrees on the ground. Thus, when the user moves the travel bag by pushing or pulling it, the steerability of the travel bag may be enhanced. Furthermore, when the user encounters any obstacle or steps on the ground while moving the travel bag by pushing or pulling it, the user may make the travel bag easily pass the obstacle or step without lifting the heavy bag, simply by adjusting the inclined angle of the travel bag.
Referring to
The case 100 may be a hard case or a soft case. The case 100 may have a generally rectangular parallelepiped shape. A handle 110 may be disposed at an upper portion of the case 100 so that a user may pull the case 100 using the handle 110.
The handle 110 may be fixed to the case 100. In contrast, the handle 110 may be designed to be slid in and out for a user convenience as shown in
When the user pulls up the handle 110 disposed at the upper portion of the case 100, two bars 120 connected to the handle 110 may be slid out so that a position of the handle 110 may get higher. Herein, two parallel bars 120 may extend from the upper portion of the case 100 and may be connected to each other by the handle 110. The structure of the handle 110 which may be slid in and out may be a conventional structure so that a detailed explanation regarding the structure of the handle 110 may be omitted.
As shown in
The case 100 may be mounted on the frame 200. A weight of the case 100 may be transmitted to the ground through the first wheels W1 and the second wheels W2 formed under the frame 200. The case 100 may be coupled to the frame 200 to be pivotable on a rotating axis A, which may be disposed over the second wheels W2, but not limited thereto. Although not specifically shown in the drawings, in an exemplary embodiment, the case 100 may pivot on the rotating axis A such that a direction of a height of the case 100 is inclined with respect to a Z axis direction, which is perpendicular to a ground.
Referring to
As shown in
As shown in
The angle maintaining units 300 may include a plurality of holes 301. Each of the angle maintaining units 300 may be respectively disposed and coupled to the frame 200 over each first wheel W1. In one embodiment, the angle maintaining units 300 may have a shape of an arc of a circle whose center is the rotating axis A. Along a longitudinal direction of each angle maintaining unit 300, the plurality of the holes 301 may be formed spaced apart from one another. In an exemplary embodiment, the angle maintaining units 300 may be coupled to the frame 200 to be able to slide into or slide out from a certain space of the case 100, which is prepared in advance for accommodating the angle maintaining units 300 according to the rotation of the case 100. Namely, the angle maintaining units 300 may be received in the certain space of the case 100 so that the angle maintaining unit 300 may not be entirely or partially outwardly exposed. However, for convenience of explanation, in
For example, the hole 301 may be a recess space having a shape of a portion of hollow hemisphere (e.g. a half of the hemisphere), which is open towards the case 100 (i.e., in a direction toward a protrusion of an adjusting unit 400, which is to be discussed below). A curved portion of the hole 301 may be disposed at an upper position, but the present inventive concept is not limited thereto. The shape of the recess space of the hole 301 may correspond to a shape of an end portion of the protrusion 450 of the adjusting unit 400 so that the end portion of the protrusion 450 may be inserted and fit into the hole 301. When the user applies a turning force to the case 100 to change from the status of
The protrusion 450 may include the end portion to be inserted into or ejected from the hole 301. The protrusion 450 may be disposed within the case 100 (in particular, in a corresponding position of a mounting portion 130), with being pressed toward the angle maintaining unit 300 by an elastic member 452 attachedly disposed in the mounting portion 130. As shown in
As shown in
As shown in
When the user applies the pressure to the adjusting unit 400 through the operating portion 420, the pressure may be transmitted to the contact portion 410 through the connecting portion 430. By the operation (e.g. the applied pressure) of the user, the contact portion 410 may push the protrusion 450 in an outward direction from the hole 301 so that the protrusion 450 may be easily ejected from the hole 301. The contact portion 410 and the connecting portion 430 may form a bended bar shape having a shape of “∩” or “Π”.
The mounting portion 130 may be formed within the case 100 (e.g. on a front inner surface of the case 100). The contact portion 410, a part of the operating portion 420, the connecting portion 430, the elastic part 440, the protrusion 450 and the elastic member 452 of the adjusting unit 400 may be disposed within the mounting portion 130. The mounting portion 130 (represented by dotted lines in
The operating portion 420 may be protruded over an upper surface of the case 100 and may be operated by the user to make the contact portion 410 push an slope surface 454 of the protrusion 450. A lower portion of the operating portion 420 may be connected to the connecting portion 430 within the mounting portion 130. The connecting portion 430 connects the operating portion 420 and the contact portion 410 within the mounting portion 130.
The elastic part 440 may be disposed under the operating portion 420 within the mounting portion 130. The elastic part 440 applies a pressure upwardly to the operating portion 420 such that a distance between the contact portion 410 and the slope surface 454 of the protrusion 450 increases.
In
When the user takes hand off from the operating portion 420, the elastic part 440 may extend and the contact portion 410, the operating portion 420 and the connecting portion 430 may be moved upwardly by an extended distance of the elastic part 440. The mounting portion 130 may include a space for allowing movement of the contact portion 410, the operating portion 420 and the connecting portion 430 in the upper and lower directions.
The contact portion 410 may be disposed right above the slope surface 454. The contact portion 410 may push the slope surface 454 such that the protrusion 450 moves toward the elastic member 452 away from the hole 301.
In
When the user stops pushing the operating portion 420 after rotating the case 100 with respect to the frame 200, then, the protrusion 450 may be inserted again into one of the holes 301 so that a gap (and an angle) between the case 100 and the frame 200 may be maintained.
As shown in
If the case 100 rotates from the status in
Referring to
When the user steps on the foothold 222, the first wheels W1 may be pushed to the ground and the rolling of the first wheels W1 may be prevented by the friction pad 223. Thus, by stepping on the foothold 222 while rotating the case 100, the user can prevent the frame 200 from rotating with the case 100.
According to the present inventive concept, the travel bag 10 may include the frame 200 having a quadrilateral shape, under which the two first wheels W1 and the two second wheels W2 rolling on the ground are attached. The angle between the frame 200 and the case 100 of the travel bag 10 may be freely adjusted while the travel bag 10 is moving or stopped. Regardless of the adjusted angle, the travel bag 10 may be continuously supported by all of the wheels of the travel bag 10.
Referring to
Furthermore, as shown in
Referring to
However, the rotating axis B of the travel bag 20 according to the present exemplary embodiment may be disposed higher than the rotating axis A of the travel bag 10 according to the previous first exemplary embodiment. Thus, according to the present exemplary embodiment, the angle between the height direction and the plane defined by the wheels, in the present third embodiment may be larger than that of the first or second exemplary embodiments, when the case 100 rotates with respect to the ground around the rotating axis B. Unlike the travel bag 10 of the previous first exemplary embodiment, the angle maintaining units 360 may be disposed at inner side surfaces of the case 100 and adjusting units 470 may be coupled to the frame 200.
Hereinafter, structural differences of the travel bag 20 according to the third exemplary embodiment are mainly explained. The same reference numerals will be used to refer to the same or similar parts such as a case 100, a frame 200, a handle 110, a bar 120, a first wheel W1 and a second wheel W2 as those described in the previous exemplary embodiment of
As explained above, the case 100 may be coupled to the frame 200 rotatably around the rotating axis B. The rotating axis B may be disposed above the second wheels W2 such that when the case 100 is rotated with respect to the frame 200, a center of gravity of the travel bag 20 does not deviate from a region defined above the frame 200. Thus, even when moving the travel bag 20 in the inclined status, the travel bag 20 may not fall down even though the user does not hold the travel bag 20, and a heavy weight is prevented from being applied to a hand of the user. The rotating axis B may be disposed relatively higher position from the ground (at least higher than the position of the rotating axis A of the case 100 in
The angle maintaining units 360 may maintain an increased angle between the height direction of the case 100 and a plane defined by the first wheels W1 and the second wheels W2 after the case 100 is rotated. The angle maintaining units 360 may have a shape of an arc of a circle. A center of the circle is the rotating axis B. The angle maintaining units 360 may be disposed at both of inner surfaces of the case 100. As shown in
A protrusion 474 of the adjusting unit 470 may be inserted into the hole 362 to maintain the rotated status of the case 100 with respect to the frame 200. The protrusion 474 may be partially covered and partially hidden by the angle maintaining unit 360 in
The protrusion 474 may receive a pressure toward the angle maintaining unit 360 by an elastic member 475 of
The protrusion 474 may have an slope surface. The slope surface of the protrusion 474 may receive a pressure in a direction opposite to the elastic force of the elastic member 475 by a contact portion 472. The hole 362 may have be a recess space having a shape of a portion of hollow hemisphere, which is open in the direction toward the protrusion 474. A curved portion of the hole 362 may be disposed at a lower position, but the present inventive concept is not limited thereto. The shape of the recess space of the hole 362 may correspond to a shape of an end portion of the protrusion 474 so that the end portion of the protrusion 474 may be inserted and fit into the hole 362.
When the case 100 is rotated around the rotating axis B while the first wheels W1 and the second wheels W2 being maintained to be contact to the ground, as shown in
In the present third exemplary embodiment, an operation of a friction pad 250 may be interlocked with an operation of the adjusting unit 470. Hereinafter, the structure and the operation of the adjusting unit 470, which operates to allow the protrusion 474 to be ejected from the hole 362, and the structure and the operation of the friction pad 250, which operates to fix the wheels while the case 100 is being rotated, are explained.
The adjusting unit 470 includes an operating portion 471 to be operated by the user, the contact portion 472 to press the protrusion 474, a connecting portion 473 to connect the operating portion 471 and the contact portion 472, the protrusion 474, and the elastic member 475. In an exemplary embodiment, the adjusting unit 470 may be disposed within the frame 200. The contact portion 472 of the adjusting unit 470 may be disposed to be spaced apart from a side wall of the frame 200 inside the frame 200 such that the operation of the adjusting unit 470 may not be restricted by the frame wall. The operating portion 471 may be disposed above the second wheels W2. The contact portion 472 may extend from a portion above the first wheel W1 toward the protrusion 474 in a vertical direction.
In the present third exemplary embodiment, the angle maintaining units 360 may be disposed at both inner surfaces of the case 100 facing each other. In the present third exemplary embodiment, a portion of the adjusting unit 470 (e.g. the contact portion 472) and a portion of the frame 200 corresponding thereto may enter or exit from a certain space disposed at both inner sides of the case 100, which correspond to the angle maintaining unit 360.
When all of the wheels of the travel bag 20 are contact to the ground, if the operating portion 471 is pressed downwardly by a user, an end portion of the contact portion 472 is shifted in an upper direction by a leverage effect so that the contact portion 472 pushes the slope surface of the protrusion 474. When the slope surface of the protrusion 474 is pressed, the protrusion 474 is ejected from the hole 362 so that the case 100 may become a rotatable status in the rotating axis B.
The adjusting unit 470 may receive an elastic force in an upward direction toward the case 100 by an elastic part 480. Without an external force applied to the operating portion 471, the contact portion 472 is spaced apart from the protrusion 474 and does not press the slope surface of the protrusion 474.
In an exemplary embodiment, the elastic part 480 is disposed between the connecting portion 473 and a portion of the frame 200 disposed under the connecting portion 473. The elastic part 480 may provide the elastic force to the connecting portion 473 in an upper direction. For example, the elastic part 480 may be disposed closer to the second wheel W2 than the first wheel W1.
When the operating portion 471 is pressed, a portion of the connecting portion 473 adjacent to the second wheel W2 is pressed toward a back surface of the frame 200 and a portion of the connecting portion 473 adjacent to the first wheel W1 is moved in an upper direction so that the contact portion 472 may press the protrusion 474. When a pressing force applied to the operating portion 471 is removed, the connecting portion 473 is returned to an original position by the elastic part 480 and the contact portion 472 does not press the protrusion 474.
The friction pad 250 may be disposed adjacent to the second wheel W2. The friction pad 250 may be contact to the second wheel W2 and prevents the rolling of the second wheel W2. Although not shown in figures in detail, the friction pad 250 may have a circular shape to surround an outer surface of the second wheel W2. The friction pad 250 may be coupled to a portion of the adjusting unit 470 adjacent to the second wheel W2. In an exemplary embodiment, the friction pad 250 may be coupled to the connecting portion 473 of the adjusting unit 470 disposed over the second wheel W2.
The friction pad 250 may be maintained to be spaced apart from the second wheel W2, without an external force. When the operating portion 471 is pressed, the friction pad 250 may access and make contact to the second wheel W2 so as to constraint the second wheel W2 from moving by the friction force generated between the friction pad 250 and the second wheel W2. Since the second wheel W2 is fixed by the friction pad 250, the frame 200 may not rotate with the case 100 when the case 100 is rotated. Since the frame 200 does not rotate with the case 100 when the case 100 is rotated, the user may stably rotate the case 100 around the rotating axis B.
According to the travel bag 20 of the third exemplary embodiment, the rotating axis is disposed at a higher position and thus, the case 100 may rotate with respect to the frame 200 at a larger angle. However, the center of gravity of the travel bag 20 does not deviate from an area over a region defined by four wheels, even when the travel bag 20 rotate to form a relatively great angle, the travel bag 20 may not fall down and the rotating status thereof may be stably maintained. Furthermore, the operation of the friction pad 250 to prevent the rolling of the second wheel W2 may be interlocked with the rotation of the case 100 so that the case 100 may be stably rotated without an additional operation of the friction pad 250.
In the travel bag 30 according to the fourth exemplary embodiment, a case 100 may be rotatably coupled to the frame 200, similarly to the travel bags 10 and 20 according to the previous exemplary embodiments explained referring to
Unlike the case 100 of the travel bags 10 and 20 of the previous exemplary embodiments, the case 100 of the travel bag 30 includes two windows 32 and 34. The travel bag 30 may be opened and closed by the windows 32 and 34. In addition, the handle 110 and the bar 120 of the travel bag 30 may be disposed adjacent to a central portion of an upper surface of the case 100 of the travel bag 30, instead of an edge portion of the upper surface of the case 100 of the travel bag 30. A bottom surface of the case 100 of the travel bag 30 may have a shape of a portion of a globe, whose center may be located at a center axis C to be discussed below. The bottom surface of the case 100 may be formed not to bump into the frame 200 when the case 100 is rotated around the center axis C.
As shown in
The travel bag 30 may include the adjusting unit 490 coupled to the frame 200. In an exemplary embodiment, the adjusting unit 490 may be disposed within the frame 200. A contact portion 492 of the adjusting unit 490 may be spaced apart from a side wall of the frame 200 inside the frame 200 such that the operation of the adjusting unit 490 may not be limited by the frame wall. An operating portion 494 and a contact portion 492 may be connected by a connecting portion 493. A length of the connecting portion 493 of the travel bag 30 may be less than a length of the contact portion 492 of the travel bag 30 (However, the present inventive concept is not limited thereto). The operating portion 494 may be disposed above the second wheel W2. The contact portion 492 may extend from a portion adjacent to the first wheel W1 to the central portion (the center axis C) of the inner side surface of the case 100.
The adjusting unit 490 (and a corresponding portion of the frame 200) may be received at a certain space disposed within the case 100. For example, the adjusting unit 490 may be received at the certain space in the case 100, which is inner than the inner side surface of the case 100 at which the angle maintaining unit 380 is disposed. The adjusting unit 490 and the corresponding frame 200 may enter and exit from the certain space according to the rotation of the case 100. The adjusting unit 490 may include a protrusion, which is hidden by the angle maintaining unit 380 and thus not shown in
The case 100 may rotate around the rotating center axis C, while maintaining the first wheels W1 and the second wheels W2 to be contact to the ground. When the case 100 is rotated around the rotating center axis C, the angle maintaining unit 380 is also rotated along with the rotation of the case 100. The user may stop pressing the operating portion 494 when the case is rotated to a desired angle. Then, the case may rotate a little more and be stopped and then, the protrusion 491 may be inserted into one of the closest holes 382. After the protrusion 491 is inserted in one of the holes 382, the case 100 may not be rotatable and may maintain the status.
When all of the wheels of the travel bag 30 are contact to the ground, if the operating portion 494 is pressed downwardly by a user, an end portion of the contact portion 492 is shifted in an upper direction by a leverage effect so that the contact portion 492 pushes a slope surface of the protrusion 491. When the slope surface of the protrusion 491 is pressed, the protrusion 491 is ejected from the hole 382 so that the case 100 may become a rotatable status in the center axis C.
The adjusting unit 490 may receive an elastic force in a direction toward the case 100 by an elastic part 495. Without an external force applied to the operating portion 494, the contact portion 492 is spaced apart from the protrusion 491 and does not press the slope surface of the protrusion 491.
When the operating portion 494 is pressed, a portion of the connecting portion 493 adjacent to the second wheel W2 is pressed toward a back surface of the frame 200 and a portion of the connecting portion 473 far from the second wheel W2 (e.g. adjacent to the first wheel W1) is moved in an upper direction so that the contact portion 492 may press the protrusion 491. When a pressing force applied to the operating portion 494 is removed, the connecting portion 493 is returned to an original position by the elastic part 495 and the contact portion 492 does not press the protrusion 491.
In the present exemplary embodiment, the friction pad 260 may be disposed adjacent to the second wheel W2. The friction pad 260 may be contact to the second wheel W2 and prevents the rolling of the second wheel W2. Although not shown in figures in detail, the friction pad 260 may have a circular shape such that a portion of an upper surface of the second wheel W2 is pressed in any status of the second wheel W2. The friction pad 260 may be coupled to a portion of the adjusting unit 490 adjacent to the second wheel W2. In an exemplary embodiment, the friction pad 260 may be coupled to the connecting portion 493 disposed over the second wheel W2. The structure and the operation of the friction pad 260 of the travel bag 30 according to the present exemplary embodiment may be substantially same as the structure and the operation of the friction pad 250 of the travel bag 20 according to the previous exemplary embodiment.
In the travel bag 30 shown in
When the user uses the travel bag, the user sometimes should open the travel bag to find an object therein (e.g. to find a portable electric battery at a check-in counter in an airport). In this situation, when using a conventional travel bag, a lot of objects in the travel bag may be dropped unintentionally if the user tries to find the desired object in the vertical status of the travel bag. In such case, the user may put the travel bag on the ground and squat down or bend a waist to find the object.
According to the present exemplary embodiment, the case 100 of the travel bag 30 in
The travel bag 30 according to the present exemplary embodiment explained referring to
The foregoing is illustrative of the present inventive concept and is not to be construed as limiting thereof. Although a few exemplary embodiments of the present inventive concept have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of the present inventive concept. Accordingly, all such modifications are intended to be included within the scope of the present inventive concept as defined in the claims. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Therefore, it is to be understood that the foregoing is illustrative of the present inventive concept and is not to be construed as limited to the specific exemplary embodiments disclosed, and that modifications to the disclosed exemplary embodiments, as well as other exemplary embodiments, are intended to be included within the scope of the appended claims. The present inventive concept is defined by the following claims, with equivalents of the claims to be included therein.
Number | Date | Country | Kind |
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10-2017-0034798 | Mar 2017 | KR | national |
This application is a continuation of PCT/KR2018/003225 filed on Mar. 20, 2018 which claims priority to Korean Patent Application No. 10-2017-0034798 filed on Mar. 20, 2017, the entire contents of which are herein incorporated by reference.
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Entry |
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International Search Report for PCT/KR2018/003225 of Jul. 3, 2018. |
Number | Date | Country | |
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20200000192 A1 | Jan 2020 | US |
Number | Date | Country | |
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Parent | PCT/KR2018/003225 | Mar 2018 | US |
Child | 16564025 | US |