Draw-bar box

Abstract

The utility model discloses a draw-bar box, which comprises a box body and a draw bar component arranged on the back of the box body, a groove matched with the draw bar component is arranged on the back of the box body, the draw bar component is arranged in the groove, and the draw bar component can partially extend out of the groove. The groove matched with the pull rod assembly is formed in the back face of the box body, and the pull rod assembly is arranged in the groove, so that the pull rod assembly which is externally arranged relative to the box body is less prone to collision and is prevented from being damaged to affect normal use of the box body. In addition, the groove can play a role similar to a reinforcing rib, and the pull rod assembly and the groove are cooperated, so that the pull rod assembly is not easy to deform when being stressed.

Description

Technical Field

[0001] This utility model relates to the field of box technology, specifically to a trolley case. Background Technology

[0002] A rolling suitcase is a type of luggage with a handle and wheels. It is widely used because it can carry a large number of items and is easy to move.

[0003] Previously, the handle of a suitcase was inserted into the interior, which occupied internal space and reduced the suitcase's volume. Currently, the market also features the handle on the back of the suitcase, which saves internal space. However, because the handle is external, it protrudes from the suitcase body, making it more susceptible to damage from impacts to the back, such as dents or bends, thus affecting its usability. Furthermore, regardless of whether the handle is internal or external, it still faces a significant risk of damage (e.g., bending) when loading items, especially with force. While increasing the handle's strength can largely mitigate these problems, it undoubtedly increases material costs considerably. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a trolley case with the trolley rod externally placed in the case body, and the trolley rod is not easily damaged.

[0005] To achieve the above objectives, this utility model discloses a trolley case, including a case body and a trolley assembly disposed on the back of the case body. The back of the case body is provided with a groove adapted to the trolley assembly, the trolley assembly is placed in the groove, and a portion of the trolley assembly can extend out of the groove.

[0006] In the thickness direction of the housing, the pull rod assembly is flush with the groove opening, or the pull rod assembly is lower than the groove opening.

[0007] The pull rod assembly includes a handle, at least one inner tube, at least one outer tube, and a fixing member; the outer tubes are parallel to each other and spaced apart, and the outer tubes are connected to the housing; the fixing member is located at the bottom of the outer tubes, the fixing member connects all the outer tubes, and the fixing member is connected to the housing; the inner tubes correspond one-to-one with the outer tubes and are telescopically coupled, the upper end of the inner tube is connected to the handle; the handle can extend out of the groove.

[0008] In the stretching direction of the pull rod assembly, the groove is matched with the fixing member for limiting.

[0009] The pull rod assembly also includes a middle tube; the outer tube is sleeved on the circumference of the middle tube, and the middle tube is sleeved on the circumference of the inner tube; the inner tube, outer tube and middle tube are all flat tubes, and the width direction of the flat tube is parallel to the back of the box.

[0010] The upper end of the outer tube is snapped with a first sealing element, and the upper end of the middle tube is snapped with a second sealing element; the outer tube is connected to the box body through the first sealing element.

[0011] The box body is provided with a first liner and a second liner inside. The first liner is located at the top of the box body and is bolted to the box body and the outer tube. The second liner is located at the bottom of the box body and is bolted to the box body and the fixing component.

[0012] The inner cavity of the outer tube is provided with an isolation strip extending along the length of the outer tube on the side away from the box body. The isolation strip divides the inner cavity of the outer tube into a buffer cavity and an installation cavity. The buffer cavity is located on the side of the installation cavity away from the box body. The inner tube and the installation cavity are in telescopic cooperation.

[0013] Two isolation strips are provided, which are spaced apart from each other and located on both sides of the inner cavity of the outer tube.

[0014] The outer wall surface of the outer tube on the side away from the box is arc-shaped, and the direction of the arc pointing to its center is away from the box.

[0015] Several stiffening ribs are also arranged at intervals on the outer wall surface of the outer tube on the side away from the box body, and the length direction of the stiffening ribs is the length direction of the outer tube.

[0016] The grip includes an upper shell and a lower shell, the upper shell being detachably connected to the lower shell, and the inner tube being connected to the lower shell; the top surface of the grip and the surface facing the outside of the box are both located on the upper shell, and the upper shell is made of metal.

[0017] The lower end of the inner tube is provided with an inner tube limiting assembly, which includes a pin cylinder, a pin, a positioning pin, and an elastic element for resetting the positioning pin. The pin cylinder is connected to the lower end of the inner tube. The positioning pin and the pin are slidably connected to the pin cylinder, and the pin can push the positioning pin to move. The positioning pin is provided with a pin, and the pin can extend out of the pin cylinder. The upper end of the pin is adapted to the shape of the inner cavity of the inner tube, and the top surface of the pin is recessed downward to form a guide groove for guiding the transmission steel bar. Under normal conditions, the pin extends out of the pin cylinder, and when the positioning pin is pushed, the pin retracts into the pin cylinder.

[0018] With the above solution, a groove adapted to the pull rod assembly is provided on the back of the enclosure, within which the pull rod assembly is placed. This makes the pull rod assembly less susceptible to impact compared to an externally mounted assembly, preventing damage and ensuring normal use. Furthermore, the groove also acts as a reinforcing rib; the pull rod assembly and the groove work together to reduce deformation under stress. Using flat tubes for the inner, middle, and outer tubes of the pull rod assembly minimizes the impact of the groove on the internal space of the enclosure. Moreover, an insulating strip is installed inside the outer tube, dividing it into a buffer chamber and a mounting chamber. Even if the outer tube deforms slightly upon impact, the buffer chamber prevents interference with the normal use of the pull rod assembly. Additionally, the outer wall surface of the outer tube away from the enclosure is curved. This reduces the contact area with the impactor on this side, and the addition of reinforcing ribs further enhances its strength and resistance to deformation. In addition, making the upper shell of the grip a metal part can also make the grip less likely to deform or be damaged when it is hit. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention;

[0020] Figure 2 This is a reference diagram showing the usage state of this utility model;

[0021] Figure 3 This is one of the cross-sectional views of this utility model;

[0022] Figure 4 This is a second sectional view of the present invention;

[0023] Figure 5 This is a schematic diagram of the fastener;

[0024] Figure 6 This is a schematic diagram of the cross-section of the outer tube;

[0025] Figure 7 This is a schematic diagram showing the fit between the outer tube, middle tube, and inner tube.

[0026] Figure 8 This is a schematic diagram of the first edge banding component;

[0027] Figure 9 for Figure 3 Enlarged diagram of section A in the middle;

[0028] Figure 10 This is an exploded view of the grip;

[0029] Figure 11 An exploded view of the grip from another perspective;

[0030] Figure 12This is a partial schematic diagram of the present invention (the upper shell of the hidden grip).

[0031] Explanation of symbols for main components:

[0032] Box body 10; groove 11; first liner 12; second liner 13;

[0033] Fixing component 21; outer tube 22; first sealing component 221; connecting boss 222; isolation strip 223; buffer cavity 224; mounting cavity 225; stiffening rib 226; inner tube 23; pin cylinder 231; positioning pin 232; elastic component 233; insert pin 234; pin 235; mating groove 237; first inclined surface 238; second inclined surface 239; guide groove 23a; middle tube 24; middle tube limiting component 241; handle 25; upper housing 251; lower housing 252; button 253. Detailed Implementation

[0034] like Figure 1-12 As shown, this utility model discloses a trolley case, which includes a case body 10 and a trolley assembly disposed on the back of the case body 10. A groove 11 adapted to the trolley assembly is provided on the back of the case body 10. The trolley assembly is placed in the groove 11, and the direction of movement (extension direction) of the trolley assembly is the height direction of the case body 10. In the height direction of the case body 10, the handle 25 of the trolley assembly can extend out of the groove 11. In the thickness (width) direction of the case body 10, the trolley assembly is flush with the opening of the groove 11, or the trolley assembly is lower than the opening of the groove 11, preferably the former. With this arrangement, the trolley assembly is not obtrusive. Compared to trolley cases without a groove 11 on the back of the case body 10, when the back of the case body 10 is impacted, the back of the case body 10 and the trolley assembly can share the force, and the trolley assembly is no longer the main stress point, making it less prone to damage.

[0035] The pull rod assembly includes a handle 25, two inner tubes 23, two outer tubes 22, two middle tubes 24, and a fixing member 21. In the stretching direction of the pull rod assembly, the groove 11 and the fixing member 21 are matched for limiting, thereby providing a support point for the outer tubes 22. A second liner 13 is provided at the bottom of the inner cavity of the housing 10. The second liner 13, the housing 10, and the fixing member 21 are connected together by bolts, thereby fixing the fixing member 21. With this fixing, the back panel of the housing 10 is essentially clamped between the fixing member 21 and the second liner 13, making it less likely for the fixing member 21 to damage the housing 10 when it is under force.

[0036] Two outer tubes 22 are parallel to each other and spaced apart. The lower end of the outer tube 22 is inserted into the fixing member 21 and connected by bolts, pins, or rivets to fix the two together. Inserting the lower end of the outer tube 22 into the fixing member 21 can hide the lower end of the outer tube 22, which is beneficial to aesthetics. The upper end of the outer tube 22 is connected to the box body 10 through the first sealing member 221. Specifically, the first sealing member 221 is inserted into the upper port of the outer tube 22 and snapped together, thereby fixing the first sealing member 221. A connecting boss 222 is specially provided on the outside of the first sealing member 221, and the outer tube 22 has a notch to avoid the connecting boss 222. A first liner 12 is provided at the top of the inner cavity of the box body 10. The first liner 12, the box body 10, and the connecting boss 222 on the first sealing member 221 are connected together by bolts, thereby fixing the upper end of the outer tube 22. Of course, the upper end of the outer tube 22 can also be fixed by bolting the first liner 12, the housing 10 and the outer tube 22. Compared with the latter, the former can simplify the processing of the outer tube 22 and the bolts used for connection are less likely to cause interference. In addition, the setting of the connecting boss 222 can play a role in assisting the limiting of the outer tube 22.

[0037] The strength of the outer tube 22 is crucial to the proper functioning of the tie rod assembly. To ensure the strength of the outer tube 22 and to guarantee its continued operation even if it undergoes localized deformation due to impact, the structure of the outer tube 22 is specifically designed. Specifically, two isolation strips 223 are installed within the inner cavity of the outer tube 22. These isolation strips 223 are located on the side of the inner cavity away from the housing 10, spaced apart and positioned on opposite sides of the width of the inner cavity. Alternatively, the two isolation strips 223 can be connected to form a single integrated plate. The isolation strips 223 extend along the length of the outer tube 22. With this configuration, the isolation strip 223 divides the inner cavity of the outer tube 22 into a buffer cavity 224 and an installation cavity 225. The buffer cavity 224 is located on the side of the installation cavity 225 away from the housing 10. In this way, the tube wall on the side of the outer tube 22 away from the housing 10 is the part of the outer tube 22 that is easily impacted. When it is deformed by impact, due to the configuration of the buffer cavity 224, the installation cavity 225 will not be affected if the amount of deformation is small.

[0038] In addition, to minimize the contact area between the outer tube 22 and the impacting object on the side of the outer tube 22 away from the housing 10, the outer wall surface of the outer tube 22 on this side is arc-shaped, with the arc pointing towards its center in the direction away from the housing 10. Simultaneously, several stiffening ribs 226 are spaced apart on the outer wall surface of the outer tube 22 on this side to enhance its impact resistance; the length direction of the stiffening ribs 226 is the same as the length direction of the outer tube 22. The outer tube 22, the isolation strip 223, and the stiffening ribs 226 can be integrally formed. To ensure aesthetics, the portion of the first sealing member 221 protruding from the outer tube 22 is adapted to the shape of the side of the outer tube 22 away from the housing 10. That is, the portion of the first sealing member 221 protruding from the outer tube 22 on the side away from the housing 10 is also arc-shaped and has added stiffening ribs 226, making the placement of the first sealing member 221 less obtrusive.

[0039] The inner tube 23, outer tube 22, and middle tube 24 are in one-to-one correspondence. The outer tube 22 is fitted onto the circumference of the middle tube 24, meaning the middle tube 24 and outer tube 22 are in telescopic cooperation. The middle tube 24 is fitted onto the circumference of the inner tube 23, meaning the inner tube 23 and middle tube 24 are in telescopic cooperation. Both the inner tube 23 and outer tube 22 are inserted into the mounting cavity 225, so the buffer cavity 224 can protect the inner tube 23 and middle tube 24. In addition, in order to minimize the impact of the groove 11 on the internal accommodating space of the box 10, the inner tube 23, outer tube 22, and middle tube 24 are all made into flat tubes, and the width direction of the flat tubes is parallel to the back of the box 10.

[0040] The inner tube 23 and the middle tube 24 need to be limited to prevent them from being pulled out. Specifically, an inner tube 23 limiting component is set at the lower end of the inner tube 23, a second sealing component is set at the upper end of the middle tube 24, and a middle tube limiting component 241 is set at the lower end of the middle tube 24. The second sealing member is inserted into the upper port of the middle tube 24 and secured with a snap fastener. The inner tube 23 passes through the second sealing member. The second sealing member cooperates with the inner tube 23 limiting component to prevent the inner tube 23 from being pulled out. The middle tube 24 passes through the first sealing member 221. The first sealing member 221 cooperates with the middle tube limiting component 241 to prevent the middle tube 24 from being pulled out. In this embodiment, the outer tube 22 is made of metal material to further improve its strength. The first sealing member 221 is made of plastic material. The first sealing member 221 is inserted into the upper port of the outer tube 22 to prevent the end of the metal outer tube 22 from injuring the user. At the same time, the middle tube 24 will not directly contact the metal inner surface of the outer tube 22, reducing frictional wear.

[0041] The inner tube 23 limiting assembly includes a pin cylinder 231, a positioning pin 232, an elastic element 233, and a locking pin 234. The pin cylinder 231 is fixedly connected to the lower end of the inner tube 23 by means of a snap fastener or a screw. The positioning pin 232 is slidably connected in the pin cylinder 231, and the sliding direction of the positioning pin 232 is perpendicular to the length direction of the inner tube 23. A pin 235 is provided on one side of the positioning pin 232 (at its front end in the sliding direction), and a through hole for the pin 235 to protrude is provided on the side wall of the pin cylinder 231. The elastic element 233 is a spring, which is located on the side of the positioning pin 232 away from the pin 235 (i.e., the rear end of the sliding direction of the positioning pin 232). One end of the elastic element 233 abuts against the side wall of the pin cylinder 231, and the other end abuts against the positioning pin 232. Under normal conditions, the pin 235 protrudes from the through hole under the force of the elastic element 233. Multiple limiting holes are provided on the middle tube 24 to engage with the pin 235. The limiting holes are spaced apart along the length of the middle tube 24. When the pin 235 is inserted into the limiting hole, the inner tube 23 can be fixed relative to the middle tube 24.

[0042] A mating groove 237 is formed by a downward recess on the top surface of the locating pin 232, and a first inclined surface 238 is provided in the mating groove 237. The pin 234 is slidably connected to and limited in fit with the pin cylinder 231, that is, the pin 234 will not easily come out of the pin cylinder 231, and the sliding direction of the pin 234 is parallel to the length direction of the inner tube 23. A second inclined surface 239 adapted to the first inclined surface 238 is provided at the lower end of the pin 234. In this way, when the pin 234 moves down, it can push the locating pin to move and compress the elastic element 233. At this time, the pin 235 retracts into the pin cylinder 231, and the inner tube 23 can slide up and down relative to the middle tube 24. The upper end of the pin 234 is adapted to the shape of the inner cavity of the inner tube 23, and the top surface of the pin 234 is recessed downward to form a guide groove 23a for guiding the transmission steel bar. The setting of the guide groove 23a can ensure that the lower end of the transmission steel bar reliably presses against the pin 234, thereby ensuring the control of the limiting component of the inner tube 23.

[0043] The structure of the middle tube limiting component 241 is similar to that of the inner tube 23 limiting component, and will not be described in detail. Because the pin 234 corresponding to the middle tube limiting component 241 is controlled by the inner tube 23 limiting component, the pin 234 corresponding to the middle tube limiting component 241 does not need to have a guide groove 23a. A limiting insertion hole is provided on the outer tube 22 to cooperate with the pin 235 corresponding to the middle tube limiting component 241.

[0044] As an alternative, the middle tube 24 can be removed. Correspondingly, the second sealing member and the middle tube limiting component 241 are also removed. In this case, the inner tube 23 passes through the first sealing member 221. The inner tube 23 limiting component cooperates with the first sealing member 221 to limit the inner tube 23 from being pulled out. At the same time, a limiting insertion hole is provided on the outer tube 22 to cooperate with the pin 235 corresponding to the inner tube 23 limiting component.

[0045] The upper ends of both inner tubes 23 are connected to the handle 25, typically using bolts. The groove 11 on the housing 10 does not interfere with the movement of the handle 25, meaning the handle 25 can extend out of the groove 11.

[0046] The handle 25 includes an upper housing 251, a lower housing 252, a button 253, and two transmission steel bars. The upper housing 251 is bolted to the lower housing 252, and the inner tube 23 is also connected to the lower housing 252. The top surface of the handle 25 and the surface facing the outside of the housing 10 are both located on the upper housing 251. The upper housing 251 is made of metal, so that the parts of the handle 25 that are easily impacted are all made of metal, which can improve the strength of the handle 25 and make it less prone to damage. There is a cavity between the upper housing 251 and the lower housing 252, in which the button 253 is placed. The button 253 is slidably connected to the upper housing 251, and the button 253 can partially protrude from the upper housing 251, or in other words, the upper housing 251 has an opening to expose the button 253. At the same time, the upper housing 251 also limits the button 253 to prevent it from falling out.

[0047] The transmission steel bar corresponds one-to-one with the inner tube 23. One end of the transmission steel bar is connected to the button 253, and the other end is inserted into the inner tube 23 and abuts against the guide groove 23a on the pin 234. The guide groove 23a facilitates the assembly of the transmission steel bar and ensures that the transmission steel bar can reliably push the pin 234 when the button 253 is pressed.

[0048] To assist button 253 in resetting, a spring can be pressed between button 253 and lower housing 252. In addition, to facilitate the connection between button 253 and transmission steel bar, a synchronizing rod can be provided below button 253. Button 253 abuts against the top of synchronizing rod, and transmission steel bar is connected to both ends of synchronizing rod. Synchronizing rod can slide with lower housing 252.

[0049] As an alternative, the tie rod assembly can consist of only one outer tube 22, one middle tube 24, and one inner tube 23.

[0050] The key to this invention lies in the presence of a groove 11 on the back of the housing 10 that is adapted to the pull rod assembly. The pull rod assembly is placed within this groove, making it less susceptible to impact compared to an externally mounted pull rod assembly, thus preventing damage and ensuring its normal use. Furthermore, the groove 11 also acts as a reinforcing rib, and the pull rod assembly and groove 11 work together to reduce deformation under stress. The inner tube 23, middle tube 24, and outer tube 22 of the pull rod assembly are designed as flat tubes, minimizing the impact of the groove 11 on the internal space of the housing 10. Moreover, a partition strip 223 is provided within the inner cavity of the outer tube 22, dividing it into a buffer cavity 224 and a mounting cavity 225. Even if the outer tube 22 is slightly deformed by impact, the buffer cavity 224 will prevent interference with the normal use of the pull rod assembly. Furthermore, by making the outer wall surface of the outer tube 22 away from the housing 10 curved, the area of ​​the outer wall surface of the outer tube 22 away from the housing 10 that can contact the impacting object when it is impacted is smaller, and reinforcing ribs 226 are added on it, making the outer tube 22 less prone to deformation and stronger when impacted. In addition, making the upper shell 251 of the grip 25 a metal part can also make the grip 25 less prone to deformation or damage when impacted.

[0051] The above description is merely an embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A rolling suitcase, characterized in that: The device includes a housing and a pull rod assembly disposed on the back of the housing. The back of the housing has a groove adapted to the pull rod assembly, the pull rod assembly is placed in the groove, and a portion of the pull rod assembly can extend out of the groove.

2. A rolling suitcase according to claim 1, characterized in that: In the thickness direction of the housing, the pull rod assembly is flush with the groove opening, or the pull rod assembly is lower than the groove opening.

3. A rolling suitcase according to claim 1, characterized in that: The pull rod assembly includes a handle, at least one inner tube, at least one outer tube, and a fixing member; the outer tubes are parallel to each other and spaced apart, and the outer tubes are connected to the housing; the fixing member is located at the bottom of the outer tubes, the fixing member connects all the outer tubes, and the fixing member is connected to the housing; the inner tubes correspond one-to-one with the outer tubes and are telescopically coupled, the upper end of the inner tube is connected to the handle; the handle can extend out of the groove.

4. A trolley case according to claim 3, characterized in that: In the stretching direction of the pull rod assembly, the groove is matched with the fixing member for limiting.

5. A rolling suitcase according to claim 3, characterized in that: The pull rod assembly also includes a middle tube; the outer tube is sleeved on the circumference of the middle tube, and the middle tube is sleeved on the circumference of the inner tube; the inner tube, outer tube and middle tube are all flat tubes, and the width direction of the flat tube is parallel to the back of the box.

6. A rolling suitcase according to claim 5, characterized in that: The upper end of the outer tube is snapped with a first sealing element, and the upper end of the middle tube is snapped with a second sealing element; the outer tube is connected to the box body through the first sealing element.

7. A rolling suitcase according to claim 3, characterized in that: The box body is provided with a first liner and a second liner inside. The first liner is located at the top of the box body and is bolted to the box body and the outer tube. The second liner is located at the bottom of the box body and is bolted to the box body and the fixing component.

8. A rolling suitcase according to claim 3, characterized in that: The inner cavity of the outer tube is provided with an isolation strip extending along the length of the outer tube on the side away from the box body. The isolation strip divides the inner cavity of the outer tube into a buffer cavity and an installation cavity. The buffer cavity is located on the side of the installation cavity away from the box body. The inner tube and the installation cavity are in telescopic cooperation.

9. A rolling suitcase according to claim 8, characterized in that: Two isolation strips are provided, which are spaced apart from each other and located on both sides of the inner cavity of the outer tube. The outer wall surface of the outer tube on the side away from the box is arc-shaped, and the direction of the arc towards its center is away from the box. Several stiffening ribs are also arranged at intervals on the outer wall surface of the outer tube on the side away from the box body, and the length direction of the stiffening ribs is the length direction of the outer tube.

10. A rolling suitcase according to claim 3, characterized in that: The grip includes an upper shell and a lower shell, the upper shell being detachably connected to the lower shell, and the inner tube being connected to the lower shell; the top surface of the grip and the surface facing the outside of the box are both located on the upper shell, and the upper shell is made of metal; The lower end of the inner tube is provided with an inner tube limiting assembly, which includes a pin cylinder, a pin, a positioning pin, and an elastic element for resetting the positioning pin. The pin cylinder is connected to the lower end of the inner tube. The positioning pin and the pin are slidably connected to the pin cylinder, and the pin can push the positioning pin to move. The positioning pin is provided with a pin, and the pin can extend out of the pin cylinder. The upper end of the pin is adapted to the shape of the inner cavity of the inner tube, and the top surface of the pin is recessed downward to form a guide groove for guiding the transmission steel bar. Under normal conditions, the pin extends out of the pin cylinder, and when the positioning pin is pushed, the pin retracts into the pin cylinder.

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