Locking device for packaging box

Abstract

The present invention relates to a locking device for a packaging box, the packaging box comprising a box body, an upper cover assembly and a lower cover assembly stacked on each other, the locking device comprising a left hook body, a right hook body, a push block and a push spring arranged on the upper cover assembly, and a left sliding hook, a left spring, a right sliding hook and a right spring arranged on the lower cover assembly, a left hook portion and a left push portion being respectively arranged on the left sliding hook, and a right hook portion and a right push portion being respectively arranged on the right sliding hook, when the upper cover assembly is stacked on the lower cover assembly, the left hook portion and the left hook body are mutually locked, and the right hook portion and the right hook body are mutually locked, the push block being arranged between the left push portion and the right push portion, and when the upper cover assembly is disengaged from the lower cover assembly, the movable push block drives the left sliding hook to slide to the left and the right sliding hook to slide to the right via the left push portion and the right push portion, so that the left hook portion and the left hook body are mutually unlocked, and the right hook portion and the right hook body are mutually unlocked. The present invention improves the confidentiality of the packaging box, facilitates opening, and can be recycled.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging boxes, and in particular relates to a locking device for a packaging box. Background Art

[0002] Existing packaging boxes are generally sealed with tape due to their small size, which not only lacks confidentiality, but is also environmentally unfriendly, time-consuming and labor-intensive. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a locking device for a packaging box. The locking device is arranged in a small space of the packaging box to improve the confidentiality of the packaging box and the convenience of opening, and the packaging box can be recycled.

[0004] The present invention is achieved in that a locking device for a packaging box is provided, the packaging box includes a box body, an upper cover assembly and a lower cover assembly stacked on each other are respectively provided on the box body, the locking device includes a left hook body, a right hook body, a push block and a push spring arranged on the upper cover assembly, and a left sliding hook, a left spring, a right sliding hook and a right spring arranged on the lower cover assembly, a left hook portion and a left push portion are respectively provided on the left sliding hook, and a right hook portion and a right push portion are respectively provided on the right sliding hook, when the upper cover assembly is stacked on the lower cover assembly, the left hook portion and the left hook body are locked with each other, and the right hook portion and the right hook body are locked with each other, the push block is provided between the left push portion and the right push portion, and when the upper cover assembly is disengaged from the lower cover assembly, the moving push block drives the left sliding hook to slide to the left and the right sliding hook to slide to the right through the left push portion and the right push portion, so that the left hook portion and the left hook body are unlocked from each other, and the right hook portion and the right hook body are unlocked from each other.

[0005] Furthermore, the locking device also includes an anti-theft plug-in arranged on the box body, the anti-theft plug-in includes a plug-in board, a connecting part and an elastic snap buckle, the connecting part is a breakable part and is located between the plug-in board and the elastic snap buckle, plug-in holes corresponding to the installation of the anti-theft plug-in are respectively provided on the upper cover assembly and the lower cover assembly, the plug-in board is located on the upper cover assembly, the connecting part is installed in the plug-in hole, and the elastic snap buckle is clamped on the lower cover assembly, and the plug-in board is arranged at the front part of the moving path of the push block to limit the forward movement of the push block.

[0006] Furthermore, inclined abutment edges are respectively provided on the tops of the left hook body and the right hook body, and correspondingly, inclined abutment edges are also respectively provided on the tops of the left hook portion and the right hook portion.

[0007] Furthermore, insertion holes for the left hook and the right hook are respectively provided on the lower cover assembly, and guiding slopes are respectively provided on the front and rear sides of the top of the insertion holes to facilitate the insertion of the left hook and the right hook.

[0008] Furthermore, inclined pushing edges are respectively provided on both side surfaces of the push block, and correspondingly, inclined pushing edges are also respectively provided on the side surfaces of the left push portion and the right push portion.

[0009] Furthermore, the upper cover assembly also includes an upper cover plate, an upper cover and an upper base plate. The upper cover is arranged between the upper cover plate and the upper base plate. The upper cover plate is also located at the upper part and the rear side of the upper cover. The left hook body and the right hook body are respectively arranged on the upper cover plate. The push block and the push spring are respectively arranged between the upper cover plate and the upper base plate. A push slide, a front limit gear and a rear limit gear are respectively arranged on the upper base plate. The push spring is located in the push slide. The front limit gear and the rear limit gear respectively limit the forward and backward movement range of the push block.

[0010] Furthermore, the lower cover assembly also includes a lower cover, a lower cover plate, a sliding hook seat and a lower side plate, the lower cover plate is arranged on the upper part of the lower cover, the sliding hook seat is arranged on the side of the lower cover plate, the lower side plate is arranged on the rear side of the box body and on the outer side of the sliding hook seat, the left sliding hook, the left spring, the right sliding hook and the right spring are respectively arranged between the sliding hook seat and the lower side plate, and the left sliding hook limit 1, the left sliding hook limit 2, the right sliding hook limit 1, the right sliding hook limit 2, the left guide block, the right guide block, the left spring slot and the right spring slot are respectively arranged on the sliding hook seat, the left sliding hook limit 1 and the left sliding hook limit 2 respectively limit the left and right moving range of the left sliding hook, the right sliding hook limit 1 and the right sliding hook limit 2 respectively limit the left and right moving range of the right sliding hook, the left sliding hook moves along the left guide block, the right sliding hook moves along the right guide block, the left spring is installed in the left spring slot, and the right spring is installed in the right spring slot.

[0011] Furthermore, the locking device includes a plurality of positioning blocks provided on the lower cover assembly, and a plurality of positioning slots provided on the upper cover assembly and cooperating with the positioning blocks.

[0012] Furthermore, the positioning block is arranged on the lower cover, and the positioning block fixes the lower cover and the lower cover plate together.

[0013] Furthermore, the positioning groove is provided on the upper cover.

[0014] Compared with the prior art, the locking device of the packaging box of the present invention comprises a box body, on which an upper cover assembly and a lower cover assembly stacked on each other are respectively provided, and the locking device comprises a left hook body, a right hook body, a push block and a push spring arranged on the upper cover assembly, and a left sliding hook, a left spring, a right sliding hook and a right spring arranged on the lower cover assembly, a left hook portion and a left push portion are respectively provided on the left sliding hook, and a right hook portion and a right push portion are respectively provided on the right sliding hook. When the upper cover assembly is stacked on the lower cover assembly, the left hook is pushed by the left hook body and then locked with the left hook body under the action of the left spring, and the right hook is pushed by the right hook body and then locked with the right hook body under the action of the right spring; when the upper cover assembly needs to be detached from the lower cover assembly, the push block is pushed forward, and the push block drives the left and right sliding hooks to slide simultaneously through the left and right push parts, the left sliding hook slides to the left, and the right sliding hook slides to the right. After the left hook and the left hook body are unlocked and the right hook and the right hook body are unlocked, the push block is reset under the action of the push spring, the left sliding hook is reset under the action of the left spring, and the right sliding hook is reset under the action of the right spring. The present invention provides a locking device in a narrow space of the box body, thereby improving the confidentiality of the packaging box and the convenience of opening the packaging box, and the packaging box can be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the locking device of the packaging box of the present invention in a locked state;

[0016] Figure 2 for Figure 1 A three-dimensional schematic diagram of a packaging box in a half-open state;

[0017] Figure 3 for Figure 1 A three-dimensional schematic diagram of the packaging box in a fully opened state;

[0018] Figure 4 for Figure 1 A three-dimensional schematic diagram of the packaging box after removing the upper cover and lower side panels;

[0019] Figure 5 for Figure 4 A three-dimensional schematic diagram showing that the push block moves forward to the open position when the packaging box is in the open state;

[0020] Figure 6 for Figure 1 Schematic diagram of the decomposition;

[0021] Figure 7 for Figure 6 A three-dimensional schematic diagram of the anti-theft plug-in;

[0022] Figure 8 for Figure 6 A three-dimensional schematic diagram of the middle sliding hook seat. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] Please also refer to Figures 1 to 6 As shown, a preferred embodiment of the locking device of the packaging box of the present invention, the packaging box includes a box body 1, and an upper cover assembly 2 and a lower cover assembly 3 stacked on each other are respectively provided on the box body 1, and the locking device includes a left hook body 21, a right hook body 22, a push block 23 and a push spring 24 arranged on the upper cover assembly 2, and a left sliding hook 31, a left spring 32, a right sliding hook 33 and a right spring 34 arranged on the lower cover assembly 3.

[0025] The packaging box of the present invention can be a postal packaging box or other special packaging boxes. The box body 1 can be a regular cube or an irregular cube. In order to increase the stability of the movement of the push block 23, a push spring 24 is respectively provided on both sides of the rear portion of the push block 23.

[0026] The left sliding hook 31 is provided with a left hook portion 35 and a left push portion 36, respectively. The right sliding hook 33 is provided with a right hook portion 37 and a right push portion 38, respectively. When the upper cover assembly 2 is stacked on the lower cover assembly 3, the left hook portion 35 interlocks with the left hook body 21, and the right hook portion 37 interlocks with the right hook body 22. The push block 23 is disposed between the left push portion 36 and the right push portion 38. When the upper cover assembly 2 is disengaged from the lower cover assembly 3, the moving push block 23, via the left push portion 36 and the right push portion 38, drives the left sliding hook 31 to slide leftward and the right sliding hook 33 to slide rightward, thereby unlocking the left hook portion 35 from the left hook body 21 and the right hook portion 37 from the right hook body 22.

[0027] Specifically, when the upper cover assembly 2 is stacked on the lower cover assembly 3, the left hook portion 35 is pushed by the left hook body 21 and then interlocked with the left hook body 21 under the action of the left spring 32. The right hook portion 37 is pushed by the right hook body 22 and then interlocked with the right hook body 22 under the action of the right spring 34. When the upper cover assembly 2 needs to be detached from the lower cover assembly 3, the push block 23 is pushed forward. The push block 23 drives the left and right sliding hooks 31 and 33 to slide simultaneously through the left push portion 36 and the right push portion 38. The left sliding hook 31 slides to the left and the right sliding hook 33 slides to the right. After the left hook portion 35 and the left hook body 21 are unlocked from each other and the right hook portion 37 and the right hook body 22 are unlocked from each other, the push block 23 is reset under the action of the push spring 24. The left sliding hook 31 is reset under the action of the left spring 32, and the right sliding hook 33 is reset under the action of the right spring 34.

[0028] Please also refer to Figure 6As shown in Figure 7, the locking device also includes an anti-theft plug-in 4 mounted on the box body 1. The anti-theft plug-in 4 comprises an insert plate 41, a connecting portion 42, and an elastic snap 43. The connecting portion 42 is a breakable component located between the insert plate 41 and the elastic snap 43. By lifting the rear end of the insert plate 41, the connecting portion 42, located at the bottom front end of the insert plate 41, will break. The anti-theft plug-in 4 is disposable, and once broken, the connecting portion 42 cannot be restored, thus providing the packaging box with an anti-theft function. The upper cover assembly 2 and the lower cover assembly 3 each have corresponding insert holes 10 for mounting the anti-theft plug-in 4. The insert plate 41 is located on the upper cover assembly 2, the connecting portion 42 is mounted within the insert hole 10, and the elastic snap 43 is engaged with the lower cover assembly 3. The insert plate 41 is positioned in front of the movement path of the push block 23 to limit its forward movement. The push block 23 can only continue to move forward into position after the connecting portion 42 of the anti-theft plug-in 4 is broken and the insert plate 41 is removed.

[0029] Please refer to Figures 1 to 6 As shown, inclined abutment edges 5 are provided at the tops of the left and right hooks 21, 22, respectively. Correspondingly, inclined abutment edges 5 are also provided at the tops of the left and right hooks 35, 37, respectively. When the upper cover assembly 2 and the lower cover assembly 3 are stacked, the abutment edge 5 of the left hook 35 contacts the abutment edge 5 of the left hook 21. Restricted by the abutment edge 5 of the left hook 21, the left hook 35 is pushed leftward, disengaged from the abutment edge 5 of the left hook 21, and then reset, locking the left hook 35 with the left hook 21. Simultaneously, the abutment edge 5 of the right hook 37 contacts the abutment edge 5 of the right hook 22. Restricted by the abutment edge 5 of the right hook 22, the right hook 37 is pushed rightward, disengaged from the abutment edge 5 of the right hook 22, and then reset, locking the right hook 37 with the right hook 22.

[0030] Insertion holes 6 for the left hook 21 and the right hook 22 are respectively provided on the lower cover assembly 3 , and guide slopes 61 are respectively provided on the front and rear sides of the top of the insertion holes 6 for facilitating the insertion of the left hook 21 and the right hook 22 .

[0031] Inclined push edges 7 are provided on both sides of the push block 23, and correspondingly, inclined push edges 7 are also provided on the sides of the left push portion 36 and the right push portion 38. When the upper cover assembly 2 needs to be disengaged from the lower cover assembly 3, the push block 23 moves forward, and the push edges 7 on both sides of the push block 23 simultaneously contact the push edges 7 of the left push portion 36 and the push edges 7 of the right push portion 38, driving the left sliding hook 31 to slide leftward and the right sliding hook 33 to slide rightward, thereby unlocking the left hook portion 35 from the left hook body 21 and the right hook portion 37 from the right hook body 22.

[0032] The upper cover assembly 2 also includes an upper cover plate 25, an upper cover 26, and an upper base plate 27. The upper cover 26 is positioned between the upper cover plate 25 and the upper base plate 27, with the upper cover plate 25 located both above and behind the upper cover 26. The left hook 21 and the right hook 22 are respectively positioned on the upper cover plate 25. The push block 23 and the push spring 24 are positioned between the upper cover plate 25 and the upper base plate 27. A push slide 28, a front stop 29, and a rear stop 210 are respectively positioned on the upper base plate 27. The push spring 24 is positioned within the push slide 28. The front stop 29 and the rear stop 210 respectively limit the forward and backward movement range of the push block 23.

[0033] The lower cover assembly 3 also includes a lower cover 39, a lower cover plate 310, a sliding hook seat 311, and a lower side plate 312. The lower cover plate 310 is disposed on the upper portion of the lower cover 39, the sliding hook seat 311 is disposed on the side of the lower cover plate 310, and the lower side plate 312 is disposed on the rear side of the box body 1 and on the outer side of the sliding hook seat 311. The left sliding hook 31, left spring 32, right sliding hook 33, and right spring 34 are respectively disposed between the sliding hook seat 311 and the lower side plate 312.

[0034] Please also refer to Figure 6 and Figure 8 As shown, the sliding hook seat 311 is respectively provided with a left sliding hook limiter 1 313, a left sliding hook limiter 2 314, a right sliding hook limiter 1 315, a right sliding hook limiter 2 316, a left guide block 317, a right guide block 318, a left spring slot 319, and a right spring slot 320. The left sliding hook limiter 1 313 and the left sliding hook limiter 2 314 respectively limit the left and right movement ranges of the left sliding hook 31, while the right sliding hook limiter 1 315 and the right sliding hook limiter 2 316 respectively limit the left and right movement ranges of the right sliding hook 33. The left sliding hook 31 moves along the left guide block 317, while the right sliding hook 33 moves along the right guide block 318. The left spring 32 is installed in the left spring slot 319, and the right spring 34 is installed in the right spring slot 320.

[0035] To increase the stability of the left sliding hook 31 during movement, left guide blocks 317 are provided at the left and right ends of the movement path of the left sliding hook 31 of the sliding hook seat 311. Similarly, to increase the stability of the right sliding hook 33 during movement, right guide blocks 318 are provided at the left and right ends of the movement path of the right sliding hook 33 of the sliding hook seat 311.

[0036] The locking device includes a plurality of positioning blocks 8 provided on the lower cover assembly 3, and a plurality of positioning slots 9 provided on the upper cover assembly 2 and cooperating with the positioning blocks 8. The positioning blocks 8 are provided on the lower cover 39, and the positioning blocks 8 fix the lower cover 39 and the lower cover plate 310 together. The positioning slots 9 are provided on the upper cover 26. The provision of a plurality of positioning blocks 8 facilitates increasing the stability of the position when the upper cover assembly 2 and the lower cover assembly 3 are stacked and locked, as well as the reliability of the installation of the anti-theft plug-in 4, and increases the reliability and stability when the left hook body 21 is locked with the left sliding hook 31, and the right hook body 22 is locked with the right sliding hook 33. In this embodiment, three positioning blocks 8 are provided on the lower cover assembly 3, and the three positioning blocks 8 are respectively close to the anti-theft plug-in 4. Correspondingly, three positioning slots 9 are provided on the upper cover assembly 2.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A locking device for a packaging box, the packaging box comprising a box body, characterized in that: An upper cover assembly and a lower cover assembly stacked on each other are respectively provided on the box body, and the locking device includes a left hook body, a right hook body, a push block and a push spring provided on the upper cover assembly, and a left sliding hook, a left spring, a right sliding hook and a right spring provided on the lower cover assembly. A left hook portion and a left push portion are respectively provided on the left sliding hook, and a right hook portion and a right push portion are respectively provided on the right sliding hook. When the upper cover assembly is stacked on the lower cover assembly, the left hook portion and the left hook body are locked with each other, and the right hook portion and the right hook body are locked with each other. The push block is provided between the left push portion and the right push portion. When the upper cover assembly is disengaged from the lower cover assembly, the moving push block drives the left sliding hook to slide to the left and the right sliding hook to slide to the right through the left push portion and the right push portion, so that the left hook portion and the left hook body are unlocked from each other, and the right hook portion and the right hook body are unlocked from each other. The upper cover assembly further includes an upper cover plate, an upper cover, and an upper bottom plate. The upper cover is disposed between the upper cover plate and the upper bottom plate. The upper cover plate is located at the upper portion and rear portion of the upper cover. The left hook and the right hook are respectively disposed on the upper cover plate. The push block and the push spring are disposed between the upper cover plate and the upper bottom plate. One side of the upper cover is rotatably connected to the front side of the box body. The lower cover assembly further includes a lower cover, a lower cover plate, a sliding hook seat and a lower side plate, wherein the lower cover plate is arranged on the upper portion of the lower cover, the sliding hook seat is arranged on the side of the lower cover plate, the lower side plate is arranged on the rear side of the box body and is located on the outer side of the sliding hook seat, the left sliding hook, the left spring, the right sliding hook and the right spring are respectively arranged between the sliding hook seat and the lower side plate; one side of the lower cover is connected to the rear side of the box body; The locking device also includes an anti-theft plug-in arranged on the box body, the anti-theft plug-in includes a plug-in board, a connecting part and an elastic snap buckle, the connecting part is a breakable part and is located between the plug-in board and the elastic snap buckle, plug-in holes corresponding to the installation of the anti-theft plug-in are respectively provided on the upper cover assembly and the lower cover assembly, the plug-in board is located on the upper cover assembly, the connecting part is installed in the plug-in hole, and the elastic snap buckle is clamped on the lower cover assembly, and the plug-in board is arranged at the front part of the moving path of the push block to limit the forward movement of the push block.

2. The locking device of the packaging box according to claim 1, characterized in that: Inclined abutment edges are respectively provided on the tops of the left hook body and the right hook body, and correspondingly, inclined abutment edges are also respectively provided on the tops of the left hook portion and the right hook portion.

3. The locking device of the packaging box according to claim 1, characterized in that: Insertion holes for the left hook body and the right hook body are respectively provided on the lower cover assembly, and leading inclined surfaces for facilitating the insertion of the left hook body and the right hook body are respectively provided on the front and rear sides of the top of the insertion hole.

4. The locking device of the packaging box according to claim 1, characterized in that: Inclined pushing edges are respectively provided on both side surfaces of the push block, and correspondingly, inclined pushing edges are also respectively provided on the side surfaces of the left push portion and the right push portion.

5. The locking device of the packaging box according to claim 1, characterized in that: A push slide, a front limit stop and a rear limit stop are respectively arranged on the upper base plate. The push spring is located in the push slide. The front limit stop and the rear limit stop respectively limit the front and rear moving range of the push block.

6. The locking device of the packaging box according to claim 5, characterized in that: A left slide hook limiter 1, a left slide hook limiter 2, a right slide hook limiter 1, a right slide hook limiter 2, a left guide block, a right guide block, a left spring slot and a right spring slot are respectively arranged on the slide hook seat. The left slide hook limiter 1 and the left slide hook limiter 2 respectively limit the left and right moving ranges of the left slide hook, and the right slide hook limiter 1 and the right slide hook limiter 2 respectively limit the left and right moving ranges of the right slide hook. The left slide hook moves along the left guide block, and the right slide hook moves along the right guide block. The left spring is installed in the left spring slot, and the right spring is installed in the right spring slot.

7. The locking device of the packaging box according to claim 6, characterized in that: The locking device includes a plurality of positioning blocks arranged on the lower cover assembly, and a plurality of positioning grooves arranged on the upper cover assembly and matched with the positioning blocks.

8. The locking device of the packaging box according to claim 7, characterized in that: The positioning block is arranged on the lower cover, and the positioning block fixes the lower cover and the lower cover plate together.

9. The locking device of the packaging box according to claim 7, characterized in that: The positioning groove is arranged on the upper cover.

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