T-shaped nail rotation locking type picture frame anti-theft device
The T-shaped nail rotating locking anti-theft device for picture frames, utilizing a locking and unlocking mechanism combined with the limiting groove design of the T-shaped nail and the concealed hanging body, solves the problem of traditional picture frames being easily stolen, achieving higher security and ease of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-09-23
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional picture frames have low security and are easily disassembled by thieves who can pry open the connection points with a common screwdriver or simple clips.
The frame anti-theft device uses a T-shaped nail rotating locking mechanism, which securely connects the frame to the wall through a locking and unlocking mechanism. The T-shaped nail and the limiting groove of the concealed hanging body work together, combined with the expansion tube of the plastic plug and the slot design of the wrench head, to increase the difficulty of disassembly.
It improves the security of the picture frame, making it difficult for thieves to easily pry open the connection points, thus enhancing the anti-theft performance of the picture frame. It is also simple and convenient to operate.
Smart Images
Figure CN224483550U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of picture frame security fixing technology, and in particular to a T-shaped nail rotating locking anti-theft device for picture frames. Background Technology
[0002] In the field of art exhibition and collection, the security of picture frames is of paramount importance as an important medium for protecting and displaying paintings.
[0003] Traditional frame anti-theft devices often use ordinary screws, exposed hooks, or simple clips, which have significant drawbacks: ordinary screws have standard head shapes (such as Phillips head or flathead head), which can be easily loosened and removed with a general-purpose screwdriver; exposed hooks rely solely on gravity or simple clips for connection, and thieves can directly observe and pry the connection point, resulting in low security. Therefore, a T-shaped nail rotating locking frame anti-theft device is needed. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a T-shaped nail rotating locking anti-theft device for picture frames.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A T-shaped nail rotating locking anti-theft device for picture frames includes a frame body, a keel frame fixedly connected to the side of the frame body, load-bearing concealed hanging brackets fixedly connected to the top two sides of the keel frame, and a locking mechanism provided at the bottom center of the keel frame. The locking mechanism includes a concealed hanging bracket body, which fits against the side of the keel frame. A limit groove is provided on one side of the concealed hanging bracket body, and fixing plates are fixedly connected to both sides of the concealed hanging bracket body. Fixing holes are provided on the sides of the fixing plates on both sides of the concealed hanging bracket body.
[0007] As a further improvement of this utility model: threaded holes are respectively opened on the side of the keel frame, and bolts are threadedly connected to the inner walls of the threaded holes and fixing holes on both sides of the concealed hanging body.
[0008] As a further improvement of this utility model: a wall is provided on one side of the frame, and a round hole is opened at the bottom of the wall near the keel frame. A plastic plug expansion tube is inserted into the inner wall of the round hole on the side of the wall.
[0009] As a further improvement of this utility model: the inner wall of the plastic plug expansion tube is threaded with a T-shaped nail head, and a connecting rod is fixedly connected to one end of the T-shaped nail head near the concealed hanging body.
[0010] As a further improvement of this utility model: a limiting block is fixedly connected to the end of the connecting rod, the limiting block is adapted to the limiting groove, and the connecting rod connected to the limiting block is just locked into the concealed hanging body.
[0011] As a further improvement of this utility model: unlocking mechanisms are provided on both sides of the connecting rod, and the unlocking mechanism includes a wrench head, the end of which is provided with a slot.
[0012] As a further improvement of this utility model: the groove at the end of the wrench head is engaged with both sides of the connecting rod, and a handle is fixedly connected to the end of the wrench head away from the groove.
[0013] Compared with the prior art, this utility model provides a T-shaped nail rotating locking anti-theft device for picture frames, which has the following beneficial effects:
[0014] 1. This T-shaped nail rotating locking anti-theft device for picture frames, equipped with a locking mechanism, allows the operator to first create locking holes on both sides of the top of the wall, and then create a round hole at the center of the bottom of the wall. The heavy-duty concealed hanging bracket connected to the frame is then fixed to the locking holes using nails. Next, a plastic expansion tube is inserted into the round hole using a tool and secured. The T-shaped nail head connected to the connecting rod is aligned with the inside of the round hole and rotated several times. To ensure the limiting block can enter the limiting groove horizontally, the limiting block connected to the connecting rod must be kept flush with the limiting groove after rotation. At this point, the operator aligns the concealed hanging body on the frame with the limiting block, allowing the T-shaped nail to enter the concealed hanging body horizontally, preparing for subsequent locking. Compared to exposed hooks or simple buckles, this device makes it less likely for thieves to pry open the connection points, thus improving security.
[0015] 2. This T-shaped nail rotating locking anti-theft device for picture frames, by means of an unlocking mechanism, allows the operator to lock the frame by holding the handle and engaging the two sides of the connecting rod through the slot on the wrench head, then rotating the wrench 90 degrees to lock the concealed hanging body with the limiting block at the end of the T-shaped nail. To unlock the frame, the operator engages the connecting rod through the slot on the wrench head, rotates it 90 degrees again, and then removes the frame. The T-shaped nail and the concealed hanging body work together, making it difficult to loosen or disassemble with a screwdriver.
[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0018] Figure 2 The main structure of this utility model exploded;
[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0020] Figure 4This is a schematic cross-sectional view of the assembly of this utility model;
[0021] Figure 5 for Figure 4 Enlarged view of point B in the middle;
[0022] Figure 6 This is a schematic diagram of the wrench of this utility model.
[0023] In the diagram: 1. Frame; 2. Keel frame; 3. Locking mechanism; 301. Concealed hanging body; 302. Limiting groove; 303. Fixing plate; 304. Fixing hole; 305. Bolt; 306. T-shaped nail head; 307. Connecting rod; 308. Limiting block; 309. Plastic plug expansion tube; 4. Unlocking mechanism; 401. Handle; 402. Wrench head; 403. Card slot; 5. Wall; 6. Round hole; 7. Heavy-duty concealed hanging. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0025] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] A T-shaped nail rotating locking anti-theft device for picture frames, such as Figure 1 , Figure 2 and Figure 4As shown, the system includes a frame 1, a keel frame 2 fixedly connected to the side of the frame 1, and load-bearing concealed hanging devices 7 fixedly connected to the top two sides of the keel frame 2. A locking mechanism 3 is provided at the bottom center of the keel frame 2. The locking mechanism 3 includes a concealed hanging body 301, which fits against the side of the keel frame 2. A limit groove 302 is provided on one side of the concealed hanging body 301, and fixing pieces 303 are fixedly connected to both sides of the concealed hanging body 301. Fixing holes 304 are provided on the sides of the fixing pieces 303 on both sides of the concealed hanging body 301. When the frame of the frame 1 is wide enough, the load-bearing concealed hanging device 7 can also be directly fixed to the side of the frame of the frame 1.
[0028] In order to hang frame 1 on the wall of wall 5, such as Figure 3 , Figure 4 and Figure 5 As shown, threaded holes are provided on the sides of the keel frame 2, and bolts 305 are threadedly connected to the inner walls of the threaded holes and fixing holes 304 on both sides of the concealed hanging body 301.
[0029] A wall 5 is provided on one side of the frame 1. A round hole 6 is opened at the bottom of the side of the wall 5 near the keel frame 2. A plastic plug expansion tube 309 is inserted into the inner wall of the round hole 6 on the side of the wall 5.
[0030] The inner wall of the plastic plug expansion tube 309 is threaded with a T-shaped nail head 306, and a connecting rod 307 is fixedly connected to one end of the T-shaped nail head 306 near the concealed hanging body 301.
[0031] The end of the connecting rod 307 is fixedly connected to a limiting block 308, which is adapted to the limiting groove 302, and the connecting rod 307 connected to the limiting block 308 is just locked with the concealed hanging body 301.
[0032] When the frame 1 needs to be hung on the wall 5, the operator first makes locking holes on both sides of the top of the wall 5, and then makes a round hole 6 in the center of the bottom of the wall 5. The heavy-duty concealed hook 7 connected to the frame 1 is first fixed by hooking it into the locking holes of the wall 5. Then, the plastic plug expansion tube 309 is fixed by inserting it into the round hole 6 with a tool clip. The T-shaped nail head 306 connected to the connecting rod 307 is aligned with the inside of the round hole 6 and rotated a few times. In order to make the limiting block 308 able to enter the limiting groove 302 horizontally, the limiting block 308 connected to the connecting rod 307 needs to be kept flush with the limiting groove 302 after rotation. At this time, the operator aligns the concealed hook body 301 on the frame 1 with the limiting block 308, so that the T-shaped nail enters the concealed hook body 301 horizontally, in preparation for the subsequent locking work. Compared with exposed hooks or simple buckles, it is not easy for thieves to pry open the connection point, and the security is relatively improved.
[0033] To lock or unlock frame 1, such as Figure 1 and Figure 6As shown, unlocking mechanisms 4 are provided on both sides of the connecting rod 307. The unlocking mechanism 4 includes a wrench head 402, and a slot 403 is provided at the end of the wrench head 402.
[0034] The slot 403 at the end of the wrench head 402 engages with both sides of the connecting rod 307, and the handle 401 is fixedly connected to the end of the wrench head 402 away from the slot 403.
[0035] When frame 1 needs to be locked, the operator holds handle 401, uses the slot 403 of wrench head 402 to engage the two sides of connecting rod 307, and then rotates the wrench 90 degrees to lock the concealed hanging body 301 with the limiting block 308 at the end of the T-shaped nail, thus locking the picture frame; when unlocking, the operator uses the slot 403 of wrench head 402 to engage connecting rod 307, rotates it 90 degrees again, and then removes frame 1; the T-shaped nail and the concealed hanging body 301 cooperate with each other, and it is not easy to loosen or disassemble with a screwdriver.
[0036] Working principle: When the frame 1 needs to be hung on the wall 5, the operator first makes locking holes on both sides of the top of the wall 5, and then makes a round hole 6 in the center of the bottom of the wall 5. First, the heavy-duty concealed hanging 7 connected to the frame 1 is fixed by hooks to the locking holes of the wall 5. Then, the plastic plug expansion tube 309 is inserted into the round hole 6 and fixed by a tool clip. After the T-shaped nail head 306 connected to the connecting rod 307 is aligned with the inside of the round hole 6 and rotated a few times, in order to make the limiting block 308 just able to enter the limiting groove 302 horizontally, the limiting block 308 connected to the connecting rod 307 needs to be kept in contact with the limiting groove after rotation. When the slot 302 is flush, the operator aligns the concealed hanging body 301 on the frame 1 with the limiting block 308, so that the T-shaped nail enters the concealed hanging body 301 horizontally. When the frame 1 needs to be locked, the operator holds the handle 401 and uses the slot 403 of the wrench head 402 to lock the two sides of the connecting rod 307. Then, the operator rotates the wrench 90 degrees to lock the concealed hanging body 301 with the limiting block 308 at the end of the T-shaped nail, thus locking the picture frame. When unlocking is required, the operator uses the slot 403 of the wrench head 402 to lock the connecting rod 307. After rotating it 90 degrees again, the frame 1 can be removed.
[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A T-shaped nail rotating locking anti-theft device for picture frames, comprising a frame (1), characterized in that, A keel frame (2) is fixedly connected to the side of the frame (1). A heavy-duty concealed hanging device (7) is fixedly connected to the top two sides of the keel frame (2). A locking mechanism (3) is provided at the bottom center of the keel frame (2). The locking mechanism (3) includes a concealed hanging body (301). The concealed hanging body (301) fits against the side of the keel frame (2). A limit groove (302) is opened on one side of the concealed hanging body (301). Fixing pieces (303) are fixedly connected to both sides of the concealed hanging body (301). Fixing holes (304) are opened on the sides of the fixing pieces (303) on both sides of the concealed hanging body (301).
2. The T-shaped nail rotating locking anti-theft device for picture frames according to claim 1, characterized in that, The keel frame (2) has threaded holes on its sides, and bolts (305) are threaded to the inner walls of the threaded holes and fixing holes (304) on both sides of the concealed hanging body (301).
3. The T-shaped nail rotating locking anti-theft device for picture frames according to claim 1, characterized in that, A wall (5) is provided on one side of the frame (1). A round hole (6) is provided at the bottom of the side of the wall (5) near the keel frame (2). A plastic plug expansion tube (309) is attached to the inner wall of the round hole (6) on the side of the wall (5).
4. The T-shaped nail rotating locking anti-theft device for picture frames according to claim 3, characterized in that, The inner wall of the plastic plug expansion tube (309) is threaded with a T-shaped nail head (306), and a connecting rod (307) is fixedly connected to one end of the T-shaped nail head (306) near the concealed hanging body (301).
5. A T-shaped nail rotating locking anti-theft device for picture frames according to claim 4, characterized in that, The end of the connecting rod (307) is fixedly connected to a limiting block (308), the limiting block (308) is adapted to the limiting groove (302), and the connecting rod (307) connected to the limiting block (308) is just locked with the concealed hanging body (301).
6. A T-shaped nail rotating locking anti-theft device for picture frames according to claim 4, characterized in that, The connecting rod (307) is provided with unlocking mechanisms (4) on both sides. The unlocking mechanism (4) includes a wrench head (402) and a slot (403) is provided at the end of the wrench head (402).
7. A T-shaped nail rotating locking anti-theft device for picture frames according to claim 6, characterized in that, The slot (403) at the end of the wrench head (402) engages with both sides of the connecting rod (307), and a handle (401) is fixedly connected to the end of the wrench head (402) away from the slot (403).