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(21)Application Number:    KE/P/2011/ 001321
       
(22) Filing Date: 24/11/2009       
           
(30) Priority data: 200910100175.9  02/07/2009  CN   
           
(86)  PCT data    PCT/CN09/001309    24/1 I/2009W0/2010/139101    09/12/2010   

(73) Owner: HANGZHOU GEMA SUITCASES & BAGS CO., LTD. of RD M16-1-5, Hangzhou Economic & Technological Development,  Zone, Zhe Jian Province, Peoples Republic of China

(72) Inventor: LU, Qiang of MI6-l-5, Hangzhou Economic & Technological Development Zone Hangzhou, Zhejiang 3100!8, China

(74) Agent/address for correspondence: Kaplan & Stratton Advocates,  P.O. Box 40111-00100, Nairobi

(54) Title: DETACHABLE ROLLER MEANS AND MOVABLE BAG OR CASE.

(57) Abstract: The present invention relates to a detachable roller means and a movable bag or case having said detachable roller means, said roller means comprises a roller seat (I) and a roller assembly, which are detachably connected to each other. The roller seat has a penetration opening (1-1) and a guide in which a spring-pretensioned button plate (2-10) is guided. Said button plate has a button arm (2-3), by means of which the button plate is displaceable along the guide. The roller assembly has a roller holder and a roller

(3). The roller holder is provided on its upper side with a lug boss (2-5) and a shaft (2-8) projecting from the lug boss. The shaft is provided with an upper stop (2-9). In a mounting status, the lug boss is abutted against the bottom of the roller seat tightly and, viewed in the insertion direction of the shaft, the button plate is engaged behind the upper stop in a spring-pretensioned manner. The button plate can be brought out of engagement with the upper stop in opposite to the spring pretension. The roller means according to the present invention is not only permanently firm, but also can be mounted and detached easily.

Detachable Roller Means and Movable Bag or Case

Field of Invention

The present invention relates to a detachable roller means and a movable bag or case having said detad1able roller means.

Background of Invention

Nowadays the life is increasingly rich and various. A bag or case, in particular a movable

10    bag or case having universal comer rollers, is usually necessary at work, ifi sports1 in recreation or the like. However, when the work or travel is finished, the bag shall be packed in a proper way, but the bag with rollers is hardly to be fixed. When a user goes outdoors for sports1 for instance, going fitness, golf, swimming or the like, which does not require too much things, and the user doesn't want to carry a bag by hand, the user

15.    can take a bag with rollers for an easy trip. Now there are bags or cases with lllliversal •corner rollers that are fixed on the bag body or case body. No matter how many degrees the rollers rotate,  they  are  not detachable. Such bags or cases have  bad adaptability during  the  application. Besides,  rollers  are worn out most quickly  among  all of the

components of a b~g or case. When the other parts of the bag or case are still in normal

20    state, but the worn rollers are out of use, it would be impossible that the user replaces the worn rollers with new ones by himself, since the rollers cannot be detached.

Moreover, a detachable roller means in a snap-fit manner is known in the prior art, wherein the snap-fit arrangement should be designed extremely firm, for preventing the

rollers from falting off unintentionally under an external load. It usually requires tools

25    or a great effort to loose the snap-fit arrangement. And the fumness of the snap-fit arrangement is reduced with the times of the actuation to the snap-fit arrangement

Summazy of Invention

The present invention is based on the object of providing a detachable roller means and a movable bag or case having said detachable roller means, wherein the detachable roller means can not only permanently prevent a roller from an unintentional falling off, but also allow an easy montage and detachment.

This object is reached according to the invention by a detachable roller, which comprises a roller seat and a roller assembly, the roller assembly and the roller seat being connected to each other detachably, wherein the roller seat has a penetration opening, a guide on the upper side of the roller seat being transverse to the penetration opening, in particular perpendicular to the penetration opening, a spring-pretensioned button plate

10    being guided in the guide, said button plate having a button arm which extends through a button through hole in the roller seat and can be actuated from outside, wherein by the actuation of the button arm the button plate is displaceable along the guide, wherein the roller assembly has a roller holder and a roller mounted thereon rotatably about a roller

axis,  a  lug  boss  and  a  shaft  projecting  from  said  lug  boss  for  inserting  into  the IS    penetration opening being arranged on the upper side of the roller holder, an upper stop being arranged on the shaft, wherein in a mounting status, the lug boss of the roller assembly is abutted against the bottom of the roller seat and, viewed in the insertion direction of the• shaf~ the button plate is engaged behind the upper stop of the roller assembly in a spring-pretensioned manner, and the button plate can be brought out of

20    engagement with the upper stop in opposite to the spring pretension.

For the detachable roller means according to the invention, the roller assembly can be mounted easily as below: the button arm is moved away laterally by one hand and then the roller assembly is inserted in position by the other hand, and then the button arm is released. In the mounting status, a permanent and firm connection between the roller

25    assembly and the roller seat is accomplished by means of an interaction between the button plate pretensioned by the spring and the upper stop, as well as by means of an abutment of the lug boss against the bottom of the roller seat, in order to prevent the rolling assembly from falling off unintentionally. In case it is necessary to detach the roller assembly, it only needs to push the button plate away laterally by one hand so as
 

to get the roller assembly off by the other hand without any trouble. The roller assembly is also easily to be exchanged in the event of the wear of the roller.

In a preferable embodiment, said detachable roller means is configured as a detachable llliversal roller means, that is to say, the roller holder is freely rotatable about a longitudinal axis. The llliversal performance of the roller means denotes the free rotation of the roller holder about the longitudinal axis. It can be carried out in various manners, and is well-known in the prior art. For example, the roller holder is freely rotatable about a longitudinal axis defined by said shaft, in particular an axis substantially perpendicular to the roller axis. In a favorable structure, the lug boss is

10    connected to the shaft in an anti-rotary manner, and the roller holder is rotatable about the shaft. In an alternative structure, the roller holder is connected to the shaft in an anti-rotary manner, while the shaft is freely rotatable in the penetration opening. Besides, a limited rotation or non-rotation of the roller holder about the longitudinal axis is also considerable.

15    In a preferable embodiment, viewed in the insertion direction of the shaft, the shaft has an intermediate stop behind the upper stop, and the distance between the upper stop and the intermediate stop is equal to the thickness of the button plate. Therefore, the button plate is engaged into the space between the upper stop and the intermediate stop in the mounting status, and contacts the top and intermediate stop simultaneously, and

20    thus it is advantageous for holding the shaft axially in a particularly firm manner.

in a preferable embodiment, the shaft is provided with a circumferential groove, the upper and lower walls thereof respectively constitute the upper stop and the intermediate stop, and the button plate has an arcuate recess corresponding to the shape of the groove.

25    In a preferable embodiment, the roller seat has a depression on its lower side, and the lug boss of the roller assembly has a complementary shape to the depression, and the depression and the lug boss are abutted against each other in the mounting status.

in a preferable embodiment, the lug boss of the roller assembly and the depression of
 
the  roller  seat  have  a  planar  abutment  surface  and  a  non-circular  cross  section

respectively. According to this embodiment not only the shaft is axially positioned in a particularly reliable manner, but also the lug boss is held in an anti-rotary mazmer, and

thus a small structure size is realized.

In a preferable embodiment, the spring is arranged in the direction of the guide, wherein one end of the spring is fixed to the button plate, In particular to a protrusion on the button plate, and the other end of the spring is fixed to a spring fixing means, which is arranged in the roller seat and is preferably configured as a protrusion or a dent.

In a preferable embodiment, a button external part is arranged in the button through

10    hole, and said button external part is connected to the button arm or integrated with the same. By actuating the button external part, the button plate is displaceable along the guide. The button plate can be actuated friendly by means of the button external part.

In a preferable embodiment, a detachable, in particular in a thread-connection manner

detachable, shell cover is provided on the upper side of the roller seat, for covering the

15    parts in the roller seat. The detachable shell cover is beneficial to the servicing of the parts in the roller seat, in particular the spring therein. For example, when the spring is out of service or same foreign matter enters into the roller seat, the exchange of the spring or removal of the foreign matter can be implemented by opening the shell cover, so as to prevent the roller seat from the malfunction and therefore prevent the entire

20    roller means from the malfunction.

In a preferable embodiment, the roller seat is connected detachably to the bag or case, in particular in a threaded connection manner.

The object of the present invention is also reached by a movable bag or case, which has a detachable roller means according to the invention, wherein the roller seat is mounted

25    on the bag or case, in particular in a threaded connection with the bag or case.

In a preferable embodiment, at each of the two sides on the bottom of the bag or the case a detachable roller means is provided respectively.
 
Brief Description to the Drawings

FIG.  1  shows  a schematic respective  of a  detachable roller  means  according to  the

invention;

FIG.  2 shows a schematic respective  of a  roller seat of the  detachable roller means

according to the inventioni

FIG. 3 shows a schematic respective of a roller assembly of the detachable roller means according to the invention;

FIG. 4 shows a schematic respective of parts of the detachable roller means according to

10    the invention in a partially exploded view; and

FIG. 5 shows a schematic respective of a movable bag or case according to the invention.

Detailed Description to the Drawings

An embodiment of the invention will be explained in detail below with reference to the

15    appended drawings, in which the roller means of the invention is configured as a detachable universal corner roller means, and at two corners of the case body a roller means.. as a comer roller means in the present embodiment, is arranged respectively. It is also considerable that the detachable roller means according to the invention is also arranged at any other position of the case body.

20    As shown in the figures, said detachable universal comer roller means substantially includes a roller seat 1 (hereby a comer roller seat), which is connected and fixed to the case body via screws1-5. Said comer roller seat 1 is provided with a roller 3 on its lower side and is connected to the roller 3 through a connection means 2. Said comer roller seat 1 is provided with a shell cover 1-6 on its upper side, wherein the shell cover 1-6 is

25    configured to be arcuate for facilitating the movement of an intemalspring 2-2, and the shell cover 1-6 is fixed to the corner roller seat 1 by means of screws 1-7 and screw bores 1-8. A penetration opening 1-1 is arranged in the comer roller seat, and a button through

hole 1-3 is arranged on the lateral side of the comer roller seat 1, and a button external part 1-4 is provided in the button through hole 1-3. The connection means 2 is provided

with a lug boss 2-5, with a rotational head means 2-6 in the interior, which extends

through the penetration opening 1-1 and the lug boss 2-5, as well as with a shaft2-8 in the rotatiaonl head means 2-6. Said shaft 2-8 is provided with an upper stop 2-9 and an intermediate stop 2-7, and with a disc 2-4 on its bottom, wherein the shaft 2-8 connects the rotational head means 2-6 with the roller 3. The intermediate stop 2-7 is positioned above the lug boss 2-5. The button plate 2-10 is movably arranged in a guide that is

transverse to the penetration opening 1-1 in the comer roller seat 1, wherein said guide

10    is particularly configured as a linear guide. The button plate 2-10 is located between the upper stop 2-9 and the intermediate stop 2-7 along the vertical direction. The button plate 2-10 is provided with an arcuate recess 2-1, which can be engaged with the rotational head means 2-6. The spring 2-2 is connected to the button plate 2-10, wherein

with one end the spring 2-2 is fixed to the button plate 2-10, and with the other end it is

15    fixed to a spring fixing means 1-2 in the comer roller seat 1. ~o~~O.is
_;~y-•.    -•~~-~:/.'F-~~
provided with a button arm 2-3 that is connected to the butto~~temal p~~t 1-4, ~h~~eii\1;;;~
H>= I    ::2".71f.lAY:ZOl1   ) .• , I
the design of the button external part 1-4 facilitates the actuatjo1t\    •    :.,    ._-    i
.    ••n..u:,,_..,~.        './, -~,,   
The roller means of the invention is substantially made of p.lasti\:\S;:}Wu!e~th€'1iG;ioi/
-...,;,;-.:,.1.""'~

plate 2-10, the button external part 1-4 and the shaft are preferably made of stainless

20    steel, or metal coated with an anticorrosive layer, or any other corrosion-resistant metal.

The shaft 2-8 and the penetration opening 1-1 can have an arbitrary but appropriate cross-section, e.g. a circular or quadrate cross-section. Preferably, the profile of the shaft 2-8 and that of the penetration opening 1-1 are configured to be fitted to each other,

thereby the radial orientation of the shaft 2-8 in the penetration opening also can be

25    realized by the fit of the both. The anti-rotational fixing of the shaft in the penetration opening can also be realized by the non-circular cross-section of the shaft 2-8 and of the penetration opening 1-1.

As shown in Fig. 5, the detachable comer roller means in the invention is used for a
 
movable bag or a movable case, wherein a corner roller seat 1 as mentioned above is

provided respectively at each of the two sides of the bottom of the case body 4.

When the roller assembly (the corner roller assembly in the embodiment shown in the figures) should be detached from the case body, the button external part 1-4 is pushed away by one hand laterally. Since the button external part 1-4 is connected to the button arm 2-3, the spring 2-2 connected to the button plate 2-10 is compressed, thus the arcuate recess 2-1 in the button plate 2-10 is disengaged with the rotational head means

2-6, and meanwhile the roller 3 is pulled out by the other hand, whereby. the roller assembly is detached from the bag or case without a great effort. When the roller

10    assembly should be mounted thereon, the button external part 1-4 is pushed away laterally by one hand, and meanwhile the roller assembly is inserted into the penetration opening 1-1 of the comer roller seat by the other hand. When the roller assembly is located in position, the button external part 1-4 is released, and the roller assembly is now mounted on the corner roller seat 1.

IS The detachable structure facilitates an arbitrary montage or detachment of the roller assembly in the usage. When a roller is worn out, the roller assembly with this roller is detached and replaced by a new one favorably, without hindering the usage of other parts in the case body.

In addition to the aforesaid exemplar embocliment, equivalents or variants having a

20    comparable effect all fall into the scope sought for protection by the invention. For example, different from the embodiment as illustrated in the figures, in which the button plate 2-10, the shell cover 1-6 etc. are arranged on the upper side of the roller seat 1, in another embocliment they can also be arranged on the lower side of the roller seat 1.

In this situation, the roller seat is closed on its upper side, and is provided with a guide

25    and a button plate 2-10 on its lower side, and the shell cover 1-6 downwardly substantially covers the roller seat •1, and the shell cover 1-6 correspondingly has a penetration opening 1-1, and is directly abutted against the lug boss 2-5 in a mounting status, and for example, the bottom of the shell cover 1-6 is also provided with a

depression fitted to the profile of the lug boss 2-5. Besides, it also pertains to an equivalent arrangement that the guide is not arranged in the basis of the roller seat but in the shell cover.

List of Reference Numerals

corner roller seat

1-1    penetration opening

1-2    spring fixing means

1-3    button through hole

10    1-4 button external part

1-5 screw

1-6 shell cover

    1-7    screw
    1-8    screw bore
15        connection means
    2-1    'arcuate recess
    2-2    spring
    2-3    button arm
    2-4    disc
20    2-5    lug boss
    2-6    rotational head means
    2-7    intermediate stop
    2-8    shalt
    2-9    upper stop
25    2-10    button plate
    3    roller
    4    casebody
 

1.    Detachable roller means, comprising a roller seat {1) and a roller assembly, characterized in that the roller assembly and the roller seat (1) are connected to each other detachably,

wherein the roller seat {1) has  a penetration opening {1-1), a guide transverse in

particular perpendicular to the penetration opening being arranged on the upper

side of the roller seat (1), a spring-pretensioned button plate (2-10) being guided in

10    the guide and having a button arm (2-3) which extends through a button through hole (1-3) in the roller seat and can be actuated from outside, the button plate (2-10) being displaceable along the guide by actuating the button arm (2-3),

wherein the roller assembly has a roller holder and a roller {3) which is mounted in

the roller holder rotatably about a roller axis, said roller holder being provided with

15    a lug boss (2-5) on its upper side and a shaft {2-8) which projects from the lug boss (2-5) and serves to insert into the penetration opening (1-1), an upper stop {2-9) being arranged on the shaft, and
wherein in a mounting status, the lug boss {2-5) of the roller assembly is abutted

against the bottom of the roller seat {1) and, viewed in the insertion direction of the

20    shaft, the button plate (2-10) is engaged behind the upper stop (2-9) of the roller assembly in a spring-pretensioned manner, and the button plate (2-10) can be brought out of engagement with the upper stop (2-9) in opposite to the spring pretension.

2.  Detachable roller means according to claim 1, characterized in that said detachable

25    roller means is configured as a universal roller means, wherein the roller holder is freely rotatable about a longitudinal axis.

3.    Detachable roller means according to claim 2, characterized in that said shaft (2-8) has an intermediate stop (2-7) that is, viewed in the insertion direction of the shaft, located behind the upper stop (2-9), wherein the distance between the upper top (2-9)
and the intermediate stop (2-7) is equal to the thickness of the button plate (2-10).

4.    Detachable roller means according to claim 3, characterized in that a circumferential groove is provided in the shaft (2-8), wherein the upper and lower walls of U1e groove are configured as the upper stop (2-9) and the intermediate stop (2-7) respectively, and the button plate (2-10} has an arcuate recess (2-1}, the shape of which is fitted to the shape of the groove.

5.    Detachable roller means according to any one of clainls 1-4, characterized in that said roller seat (1) has a depression on its lower side, and the lug boss (2-5) of the roller assembly has a shape complementary to that of the depression, wherein the lug boss
10    and the depression are abutted against each other in the mounting status.

6.    Detachable roller means according to claim 5, characterized in that the lug boss (2-5) of the roller assembly and the depression of the roller seat (1} have a planar abutment surface respectively/ and have a non-circular cross section respectively.

7.    Detachable roller means according to any one of claims 1-6, characterized in that the

15    spring (2-2} is arranged in the direction of the guide, wherein one end of the spring is fixed to the button plate (2-10), in particular to a protrusion of the button plate (2-10), and the other end of the spring is fixed to a spring fixing means (1-2) which is located in the roller seat (1) and is preferably configured as a protrusion or a dent.

8.    Detachable roller means according to any one of clainls 1-7, characterized in that a

20    button external part (1-4) is arranged in the button through hole (1-3), wherein the button external part (1-4) and the button arm (2-3) are connected to each other or configured as one piece, wherein the button plate (2-10) is displaceable along the guide by actuating the button external part (1-4).

9.    Detachable roller means according to any one of claims 1-8, characterized in that the 25       roller seat (1) is provided on its upper side with a detachable,  particularly in a threaded-connection manner detachable, shell cover (1-6) for covering the parts in

the roller seat.


10.    Detachable roller means according to any one of claims 1-9, characterized• in that the roller seat (1) is connected to a bag or a case detachably, in particular in a threaded connection manner.

11.    Movable bag or movable case, characterized in that said movable bag or case comprises a detachable roller means according to any one of claims 1 to 10, wherein the roller seat (1) is mounted on the bag or case, in particular in a threaded-connection manner.

12.    Movable bag or movable case according to claim 11, characterized in that each of the two sides of the bottom of the bag or case is provided with one detachable roller

10    means.
 
ABSTRACT

The present invention relates to a detachable roller means and a movable bag or case having said detachable roller means, said roller means comprises a roller seat (1) and a roller assembly, which are detachably connected to each other. The roller seat has a penetration opening {1-1) and a guide in which a spring-pretensioned button plate (2-10) is guided. Said button plate has a button arm {2-3), by means of which the button plate is displaceable along the guide. The roller assembly has a roller holder and a roller (3).

10    The roller holder is provided on its upper side with a lug boss (2-5) and a shalt (2-8) projecting from the lug boss. The shaft is provided with an upper stop {2-9). In a mounting status, the lug boss is abutted against the bottom of the roller seat tightly and, viewed in the insertion direction of the shaft, the button plate is engaged behind the

upper stop in a spring-pretensioned manner. The button plate can be brought out of

15    engagement with the upper stop in opposite to the spring pretension. The roller means according to the present invention is not only permanently firm, but also can be mounted and detached easily.

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