Packaging box with automatic lock
By using paper materials to design the outer box, lining, inner flaps, and locking tongue structure, the problem of the lack of automatic locks in packaging boxes is solved, realizing the automatic locking function of all-paper environmentally friendly packaging boxes, which are suitable for small-batch personalized customization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-03-17
AI Technical Summary
Existing packaging boxes lack automatic locking mechanisms and often use non-paper materials, making it difficult to meet the demands for environmental protection and personalized customization.
The outer box, lining, inner flaps, and latch structure are designed with paper materials. The latch and keyhole work together to achieve an automatic locking function. The latch is slightly smaller than the keyhole, and the lining is slightly smaller than the box body. The latch is inserted into the keyhole to lock, and squeezed out of the keyhole to open.
It achieves automatic locking function for all-paper packaging boxes, meets environmental protection requirements, and is suitable for small-batch personalized customization.
Smart Images

Figure CN223999983U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a packaging box with an automatic lock. Background Technology
[0002] In today's pursuit of a better and higher quality of life, the way product packaging is opened has become a hot topic. Furthermore, due to increasing emphasis on privacy, automatic locking boxes have become a popular packaging option. This utility model provides a structural design for a packaging box with an automatic locking mechanism. The box body is entirely made of paper material, making it cost-effective, convenient, and more refined. Utility Model Content
[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a technical solution for a packaging box with an automatic lock.
[0004] A packaging box with an automatic lock includes an outer box and a liner. The outer box comprises a box body and a lid, with the lid hinged to the top of the rear side of the box body. An inner hinge is hinged to the top of the front side of the box body, and after folding inwards, it fits against the front side of the box body. A lock hole is provided on the inner hinge. A latch is provided on the inner front side of the lid, with the latch having the same shape as the lock hole but smaller than the lock hole. The liner is fitted inside the box body, with a gap fit between the liner and the inner hinge. When the lid is folded onto the box body, the latch inserts into the gap between the liner and the inner hinge; when the lid and box body are closed, the latch falls into the lock hole, thus locking the lid and box body.
[0005] The packaging box with an automatic lock is characterized in that the size of the liner is smaller than the size of the box body, and the liner is tightly fitted to the inner ring of the box body.
[0006] The packaging box with an automatic lock is characterized in that the lower part of the locking tongue is larger than the upper part, and the locking tongue will not come off when it is inserted into the lock hole.
[0007] The packaging box with an automatic lock is characterized in that the outer box, lining, inner flap, and locking tongue are all made of paper.
[0008] The packaging box with an automatic lock is characterized in that the locking tongue is adhesively attached to the box lid.
[0009] This invention requires no other materials or components besides paper; the entire box is made of paper. It achieves the purpose of locking the box only through ingenious structural design, making it more environmentally friendly and more suitable for small-batch personalized customization. Attached Figure Description
[0010] Figure 1 This is a structural diagram of the outer box;
[0011] Figure 2 This is a schematic diagram of the lining structure;
[0012] Figure 3 This is a schematic diagram of the locking tongue structure;
[0013] Figure 4 This is a schematic diagram of the latch and keyhole in one engagement state;
[0014] Figure 5 This is a schematic diagram of the second state of engagement between the bolt and the keyhole;
[0015] Figure 6 This is a schematic diagram of the latch and keyhole in a third engagement state;
[0016] Figure 7 This is a schematic diagram of the fourth state of engagement between the bolt and the keyhole;
[0017] In the diagram: 1-Outer box, 2-Inner flap, 3-Lock tab adhesive position, 4-Lock hole, 5-Liner, 6-Lock tab, 7-Box body, 8-Box lid. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings:
[0019] A packaging box with an automatic lock includes an outer box 1 and a liner 5. The outer box 1 consists of a box body 7 and a box lid 8. The box lid 8 is hinged to the top of the rear side of the box body 7. An inner flap 2 is hinged to the top of the front side of the box body 7. The inner flap 2 flips inward and fits against the front side of the box body 7. A lock hole 4 is cut out on the inner flap 2. A latching position 3 is provided on the inner front part of the box lid 8. A latch 6 is attached to the latching position. The latch 6 has the same shape as the lock hole 4, but the latch is slightly smaller than the lock hole. The liner 5 is slightly smaller than the box body 7. The liner 5 is placed inside the box body 7 and is fitted with the inner flap 2 with a gap. When the box lid 8 is folded onto the box body 7, the latch 6 is inserted into the gap between the liner and the inner flap. When the box lid and box body are closed, the latch falls into the lock hole 4, thus locking the box lid and box body. The lower part of the latch is larger than the upper part, so the latch will not come off when it is inserted into the lock hole.
[0020] The packaging box of this utility model requires no other materials besides paper; the entire box is made of paper, and the purpose of locking the box is achieved solely through a clever structural design.
[0021] The structure of this utility model consists of an outer box, a liner, an inner flap, and a latch. The inner flap has a portion cut out to form a lock hole for locking the latch. The latch is slightly smaller than the lock hole, just enough to lock and open the box. The size of the liner is slightly smaller than the size of the box.
[0022] The overall box design is described below:
[0023] 1. The latch shape is die-cut on the inner fold of the front of the outer box. The inside of the box lid needs to have a place for pasting the latch.
[0024] 2. The dimensions of the lining should be slightly smaller than the overall dimensions of the outer box;
[0025] 3. The keyhole is slightly larger than the latch;
[0026] 4. When the box lid is closed, the latch is inserted into the key hole and the lid is held in place by the natural outward movement of the paper; when the box lid needs to be opened, the latch needs to be pushed back and forth to disengage from the key hole so that the box lid can be opened.
[0027] Molding steps:
[0028] 1. First, flatten the outer box and lining, then die-cut them. Die-cut the lock holes on the inner flaps. The size of the lining should be slightly smaller than the size of the box.
[0029] 2. Fold and glue the box body and lining separately to form the desired shape;
[0030] 3. Attach the latch to the adhesive area on the lid, then fold the lid into shape;
[0031] 4. Place the liner inside the box, with the inner hinge with the key hole between the box body and the liner. Then close the lid and insert the latch of the lid into the key hole. The entire packaging box is now complete. To open it, you need to press the front of the box body backward by hand (i.e., press back and forth) to disengage the latch from the key hole, and the lid can be opened.
[0032] This utility model represents an innovation in packaging box structure design. The entire box is made of paper material, making it more environmentally friendly and more suitable for small-batch personalized customization.
Claims
1. A package with automatic lock comprising an outer box and a surrounding liner, characterized in that The outer box is composed of a box body and a box cover, the box cover is hingedly connected to the top end of the rear side of the box body, an inner flap is hingedly arranged at the top end of the front side of the box body, the inner flap is pasted to the front side of the box body after being turned to the inside of the box body, and a lock hole is hollowed out on the inner flap; a lock tongue is arranged on the inner side of the front part of the box cover, the lock tongue is the same in shape as the lock hole and smaller than the lock hole in size; a surrounding gasket is arranged on the inside of the box body, and the surrounding gasket is gap-connected with the inner flap; when the box cover is folded on the box body, the lock tongue is inserted into the gap between the surrounding gasket and the inner flap, and the lock tongue falls into the lock hole when the box cover is closed, thereby achieving the locking of the box cover and the box body.
2. A package with automatic lock according to claim 1, characterized in that The size of the surrounding gasket is smaller than that of the box body, and the surrounding gasket is tightly arranged with the inner circle of the box body.
3. A package with automatic lock according to claim 1, characterized in that The lower part of the lock tongue is larger than the upper part, and the lock tongue will not be separated when being embedded in the lock hole.
4. The package of claim 1, wherein The outer box, the surrounding gasket, the inner flap and the lock tongue are all made of paper material.
5. The package of claim 1, wherein The lock tongue is adhesively arranged on the box cover.