Draw-bar box with self-locking function

Abstract

The utility model provides a draw-bar box with a self-locking function, which belongs to the technical field of draw-bar boxes and comprises a draw-bar box mechanism which comprises a box body, universal wheels fixedly mounted on two sides of the bottom of the box body and draw bars movably mounted on two sides of the top of the box body. The self-locking mechanism comprises a locking assembly which is arranged at the top of the box body and is positioned between the two pull rods, and a pressing assembly which is arranged at the top of the locking assembly. The pull rod can be locked at any height through the locking assembly, the problem that the pull rod can only be locked at a fixed height is solved, the effect of conveniently using the pull rod is achieved, the pull rod can be conveniently locked and released by the locking assembly through the pressing assembly, the problem that the locking assembly is inconvenient to use is solved, and the pull rod can be conveniently used. And the effect of conveniently using the locking assembly is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of draw-bar box, and particularly relates to a draw-bar box with self-locking function. BACKGROUND

[0002] The draw-bar box is a portable storage container designed for convenient travel. It is mainly composed of a box body, a telescopic draw-bar, wheels and a handle. The box body is used to store various items, and its material is various. The hard shell, such as PC and ABS, is solid and compression-resistant. The soft shell, such as nylon, is flexible and has extensibility. The draw-bar can be adjusted in length as needed and is usually made of light and durable aluminum alloy. The wheels make the box easy to move, and there are one-way wheels and universal wheels. The handle is convenient for lifting the box in special circumstances. The draw-bar box is widely used in travel, business trips and other scenes, greatly improving the convenience of carrying items.

[0003] The draw-bar of some draw-bar boxes has a self-locking function, but the self-locking mechanism can only lock the fixed height of the draw-bar and cannot lock the arbitrary height of the draw-bar, reducing the convenience of the draw-bar box. SUMMARY

[0004] The utility model aims at providing a draw-bar box with self-locking function, which aims to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A draw-bar box with self-locking function, comprising,

[0007] The draw-bar box mechanism comprises a box body, universal wheels fixedly installed on both sides of the bottom of the box body, and draw-bars movably installed on both sides of the top of the box body.

[0008] The self-locking mechanism comprises a locking assembly arranged on the top of the box body and located between the two draw-bars, and a pressing assembly arranged on the top of the locking assembly.

[0009] As a preferred scheme of the utility model, the locking assembly comprises a fixed block fixedly installed on the outer side of the box body, side grooves opened on both sides of the fixed block, a first spring fixedly installed in the inner cavity of the side groove, a moving block fixedly installed on the end face of the first spring and located in the inner cavity of the side groove, a clamping rod fixedly installed on the end of the moving block close to the draw-bar, a plurality of clamping grooves opened on the outer surface of the draw-bar, an inclined groove opened on the top of the moving block, and a limiting groove opened in the inner cavity of the inclined groove.

[0010] As a preferred scheme of the utility model, the end of the clamping rod close to the draw-bar is clamped in the inner cavity of the clamping groove, and the size of the clamping rod is matched with the size of the clamping groove.

[0011] As a preferred scheme of the utility model, the pressing assembly includes two vertical rods, a second spring fixedly installed between the two vertical rods, a second spring fixedly installed at both sides of the bottom of the connecting plate, a positioning component fixedly installed at both sides of the bottom of the connecting plate, a positioning rod fixedly installed at the center of the top of the fixed block, a positioning sleeve fixedly installed at the top of the connecting plate, a pressing plate fixedly installed at the top of the positioning sleeve, and an extrusion wheel rotatably installed at the bottom of the vertical rod through a bearing seat and matched with the limiting groove.

[0012] As a preferred scheme of the utility model, the vertical rod is movably installed at the top of the fixed block, the bottom of the second spring is fixedly installed at the top of the fixed block, the two positioning components are respectively located at both sides of the positioning rod, the top of the positioning rod extends to the inner cavity of the positioning sleeve, the top of the positioning rod is fixedly installed with a stopper for limiting, the stopper is clamped at the top of the connecting plate, and spherical grooves are formed at both sides of the positioning rod.

[0013] As a preferred scheme of the utility model, the positioning component includes a box body fixedly installed at the bottom of the connecting plate, a third spring fixedly installed in the inner cavity of the box body, a connecting block fixedly installed at the end face of the third spring and located in the inner cavity of the box body, and a clamping ball fixedly installed at one end of the connecting block close to the positioning rod.

[0014] As a preferred scheme of the utility model, the diameter of the clamping ball is matched with the depth of the spherical groove, and the extrusion wheel is located above the inclined groove.

[0015] Compared with the prior art, the utility model has the beneficial effects that the locking assembly can be used for locking the pull rod at any height, the problem that the pull rod can only be fixedly locked at a height is solved, the effect that the pull rod is conveniently used is achieved, the pressing assembly can be used for conveniently locking and releasing the pull rod by the locking assembly, the problem that the locking assembly is inconvenient to use is solved, and the effect that the locking assembly is conveniently used is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings. Among them:

[0017] Figure 1 It is the overall structure schematic diagram of the utility model;

[0018] Figure 2 It is the locking assembly structure schematic diagram of the utility model;

[0019] Figure 3The schematic diagram of the locking assembly is shown in the partial structure of the utility model.

[0020] Figure 4 The schematic diagram of the pressing assembly structure is shown in the utility model.

[0021] Figure 5 The utility model Figure 4 The partial enlarged view of A in the middle.

[0022] In the drawing: 100, trolley case mechanism; 101, box body; 102, universal wheel; 103, trolley; 200, self-locking mechanism; 201, locking assembly; 201a, fixed block; 201b, side groove; 201c, first spring; 201d, moving block; 201e, clamping rod; 201f, clamping groove; 201g, inclined groove; 201h, limiting recess; 202, pressing assembly; 202a, vertical rod; 202b, connecting plate; 202c, second spring; 202d, positioning component; 202d-1, box body; 202d-2, third spring; 202d-3, connecting block; 202d-4, clamping ball; 202e, positioning rod; 202f, positioning sleeve; 202g, pressing plate; 202h, extrusion wheel. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below with the help of the accompanying drawings.

[0024] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, and those skilled in the art can make similar generalization without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] Secondly, the "one embodiment" or "embodiment" referred to here means that specific features, structures or characteristics can be included in at least one implementation of the utility model. "In one embodiment" does not mean the same embodiment in different places in this specification, nor is it an embodiment that is independent or alternative to other embodiments.

[0026] EMBODIMENT

[0027] Refer to Figures 1-5 For the embodiment of the utility model, the embodiment provides a trolley case with self-locking function, which comprises,

[0028] The trolley case mechanism 100 comprises a box body 101, universal wheels 102 fixedly installed on both sides of the bottom of the box body 101, and trolleys 103 movably installed on both sides of the top of the box body 101.

[0029] The self-locking mechanism 200 comprises a locking assembly 201 arranged on the top of the box body 101 between the two pull rods 103, and a pressing assembly 202 arranged on the top of the locking assembly 201.

[0030] The locking assembly 201 can be used to lock the pull rod 103 at any height, solving the problem that the pull rod 103 can only be fixedly locked at a certain height, and achieving the effect of facilitating the use of the pull rod 103. The pressing assembly 202 can be used to facilitate the locking and releasing of the pull rod 103 by the locking assembly 201, solving the problem that the locking assembly 201 is inconvenient to use, and achieving the effect of facilitating the use of the locking assembly 201.

[0031] Specifically, the locking assembly 201 comprises a fixed block 201a fixedly installed on the outside of the box body 101, side grooves 201b opened on both sides of the fixed block 201a, a first spring 201c fixedly installed in the inner cavity of the side groove 201b, a moving block 201d fixedly installed on the end face of the first spring 201c and located in the inner cavity of the side groove 201b, a clamping rod 201e fixedly installed on one end of the moving block 201d close to the pull rod 103, a plurality of clamping grooves 201f opened on the outer surface of the pull rod 103, an inclined groove 201g opened on the top of the moving block 201d, and a limiting groove 201h opened in the inner cavity of the inclined groove 201g.

[0032] Further, one end of the clamping rod 201e close to the pull rod 103 is clamped in the inner cavity of the clamping groove 201f, and the size of the clamping rod 201e is matched with the size of the clamping groove 201f.

[0033] Preferably, the pressing assembly 202 comprises two vertical rods 202a, a second spring 202c fixedly installed between the two vertical rods 202a, a second spring 202c fixedly installed on both sides of the bottom of the connecting plate 202b, a positioning component 202d fixedly installed on both sides of the bottom of the connecting plate 202b, a positioning rod 202e fixedly installed on the top center of the fixed block 201a, a positioning sleeve 202f fixedly installed on the top of the connecting plate 202b, a pressing plate 202g fixedly installed on the top of the positioning sleeve 202f, and an extrusion wheel 202h rotatably installed on the bottom of the vertical rod 202a through a bearing seat and matched with the limiting groove 201h for use.

[0034] Further, the vertical rod 202a is movably installed on the top of the fixed block 201a, the bottom of the second spring 202c is fixedly installed on the top of the fixed block 201a, the two positioning components 202d are respectively located on both sides of the positioning rod 202e, the top of the positioning rod 202e extends into the inner cavity of the positioning sleeve 202f, the top of the positioning rod 202e is fixedly installed with a stop block for limiting, the stop block is clamped on the top of the connecting plate 202b, and spherical grooves are opened on both sides of the positioning rod 202e.

[0035] The stop block is used to limit the connection plate 202b, preventing the top of the positioning rod 202e from disengaging from the inner cavity of the positioning sleeve 202f under the upward elastic force of the second spring 202c.

[0036] Specifically, the positioning component 202d includes a box 202d-1 fixedly installed at the bottom of the connecting plate 202b, a third spring 202d-2 fixedly installed in the inner cavity of the box 202d-1, a connecting block 202d-3 fixedly installed on the end face of the third spring 202d-2 and located in the inner cavity of the box 202d-1, and a retaining ball 202d-4 fixedly installed on the connecting block 202d-3 near the end of the positioning rod 202e.

[0037] Furthermore, the diameter of the ball 202d-4 is matched with the depth of the spherical groove, and the extrusion wheel 202h is located above the inclined groove 201g.

[0038] By matching the diameter of the ball 202d-4 with the depth of the spherical groove, the stability of the ball 202d-4 when it is engaged in the spherical groove can be improved.

[0039] When using the device, if the pull rod 103 needs to be adjusted, the user needs to press the pressing plate 202g. The pressing plate 202g pushes the positioning sleeve 202f, the connecting plate 202b and the vertical rod 202a to move downward together. The extrusion wheel 202h moves to the inner cavity of the inclined groove 201g and pushes the moving block 201d, causing the moving block 201d to move in a relatively close direction. When the extrusion wheel 202h moves to the limiting groove 201h, the moving block 201d drives the locking rod 201e to move, and causes the locking rod 201e to be engaged with one end of the inner cavity of the locking groove 201f and disengage from the inside of the locking groove 201f.

[0040] When the connecting plate 202b moves down, the connecting plate 202b drives the box body 202d-1 to move down, and the box body 202d-1 drives the retaining ball 202d-4 to move down. When the retaining ball 202d-4 moves to the spherical groove, it is pushed open by the elastic force of the third spring 202d-2. Then, the connecting block 202d-3 drives the retaining ball 202d-4 to engage inside the spherical groove, which limits the connecting plate 202b and the vertical rod 202a, and further keeps the retaining rod 201e out of the cavity of the retaining groove 201f. At this time, the pull rod 103 can be freely adjusted up and down to adjust the pull rod 103 to a suitable height.

[0041] After the adjustment is completed, the pressing plate 202g is pulled to move upward, so that the clamping ball 202d-4 is separated from the inside of the spherical groove, and the moving block 201d is extruded and pushed under the elastic force of the first spring 201c, so that the moving block 201d drives the clamping rod 201e to move and clamps the one end of the clamping rod 201e in the inner cavity of the clamping groove 201f, and the pull rod 103 is locked.

[0042] In summary, the locking assembly 201 can be used to lock the pull rod 103 at any height, solving the problem that the pull rod 103 can only be fixedly locked at a height, achieving the effect of facilitating the use of the pull rod 103, and the pressing assembly 202 can be used to facilitate the locking and releasing of the pull rod 103 by the locking assembly 201, solving the problem that the locking assembly 201 is not convenient to use, and achieving the effect of facilitating the use of the locking assembly 201.

[0043] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in the application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be changed or re-sequenced without departing from the generality of the application. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present application. Accordingly, the present application is not limited to particular embodiments described, but extends to various modifications that nevertheless fall within the scope of the appended claims.

[0044] Furthermore, in the interest of providing a concise description of exemplary embodiments, not all features of an actual implementation can be described (i.e., those unrelated to the best mode of practicing the present application, or those unrelated to enabling the present application).

[0045] It is to be understood that the development of the particular implementations described herein was not determined merely by the availability of certain items or materials. Rather and more generally, specific implementations can be determined, for example, based on the particular requirements of the instrument or system to which that implementation relates. For example, a specific implementation of a reagent or kit can be determined based on the number of assays or assays types that are to be performed by the instrument or system that implementation relates to.

[0046] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A trolley case with a self-locking function, characterized in that: include, The trolley case mechanism (100) includes a case body (101), casters (102) fixedly installed on both sides of the bottom of the case body (101), and a pull rod (103) movably installed on both sides of the top of the case body (101). The self-locking mechanism (200) includes a locking assembly (201) disposed on the top of the housing (101) and located between two pull rods (103), and a pressing assembly (202) disposed on the top of the locking assembly (201).

2. A trolley case with a self-locking function according to claim 1, characterized in that: The locking assembly (201) includes a fixed block (201a) fixedly installed on the outside of the housing (101), side grooves (201b) opened on both sides of the fixed block (201a), a first spring (201c) fixedly installed in the inner cavity of the side groove (201b), a moving block (201d) fixedly installed on the end face of the first spring (201c) and located in the inner cavity of the side groove (201b), a locking rod (201e) fixedly installed on the moving block (201d) near one end of the pull rod (103), a plurality of locking grooves (201f) opened on the outer surface of the pull rod (103), a slope groove (201g) opened on the top of the moving block (201d), and a limiting groove (201h) opened in the inner cavity of the slope groove (201g).

3. A trolley case with a self-locking function according to claim 2, characterized in that: The end of the lever (201e) near the pull rod (103) is engaged in the inner cavity of the slot (201f), and the size of the lever (201e) and the size of the slot (201f) are adapted to each other.

4. A trolley case with a self-locking function according to claim 3, characterized in that: The pressing assembly (202) includes two vertical rods (202a), a second spring (202c) fixedly installed between the two vertical rods (202a), a second spring (202c) fixedly installed on both sides of the bottom of the connecting plate (202b), a positioning component (202d) fixedly installed on both sides of the bottom of the connecting plate (202b), a positioning rod (202e) fixedly installed at the center of the top of the fixing block (201a), a positioning sleeve (202f) fixedly installed on the top of the connecting plate (202b), a pressing plate (202g) fixedly installed on the top of the positioning sleeve (202f), and a pressing wheel (202h) rotatably installed on the bottom of the vertical rod (202a) via a bearing seat and used in conjunction with the limiting groove (201h).

5. A trolley case with a self-locking function according to claim 4, characterized in that: The vertical rod (202a) is movably mounted on the top of the fixed block (201a), the bottom of the second spring (202c) is fixedly mounted on the top of the fixed block (201a), the two positioning components (202d) are respectively located on both sides of the positioning rod (202e), the top of the positioning rod (202e) extends into the inner cavity of the positioning sleeve (202f), the top of the positioning rod (202e) is fixedly mounted with a stop for limiting the position, and the stop is engaged with the top of the connecting plate (202b), and spherical grooves are provided on both sides of the positioning rod (202e).

6. A trolley case with a self-locking function according to claim 5, characterized in that: The positioning component (202d) includes a box (202d-1) fixedly installed at the bottom of the connecting plate (202b), a third spring (202d-2) fixedly installed in the inner cavity of the box (202d-1), a connecting block (202d-3) fixedly installed on the end face of the third spring (202d-2) and located in the inner cavity of the box (202d-1), and a retaining ball (202d-4) fixedly installed on the end of the connecting block (202d-3) near the positioning rod (202e).

7. A trolley case with a self-locking function according to claim 6, characterized in that: The diameter of the ball (202d-4) is adapted to the depth of the spherical groove, and the extrusion wheel (202h) is located above the inclined groove (201g).

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