Anti-theft chain mechanism

Abstract

The utility model provides an anti-theft chain mechanism. Relates to the technical field of anti-theft tools. The anti-theft chain mechanism comprises a fixed metal plate, a movable metal plate and a mounting base, a connecting rotating shaft is rotatably mounted on the mounting base, penetrates through the movable metal plate and is fixedly connected with the movable metal plate, a linear sliding way is formed in the fixed metal plate, a connecting sliding head is slidably mounted in the linear sliding way, and the connecting sliding head is fixedly connected with the movable metal plate. A fixed head is fixedly installed on the movable metal plate, the same metal chain is fixedly installed on the connecting sliding head and the fixed head, an arc-shaped sliding piece is arranged on the installation base, the arc-shaped sliding piece penetrates through the movable metal plate and is connected with the movable metal plate in a sliding mode, and a plurality of adjusting clamping grooves are formed in the arc-shaped sliding piece. And a hollow mounting frame is fixedly mounted on the movable metal plate. The size of the gap when the door is pulled open can be adjusted according to the installation position, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-theft tools, in particular to an anti-theft chain mechanism. Background Art

[0002] In the construction and lock industry, a security door chain, also known as a burglar-proof chain or anti-theft chain, is a metal chain with a lock installed on the inside of a door. It typically consists of a sliding chain and a chain buckle. It protects the owner from sudden attacks when opening the door to identify a visitor.

[0003] However, when using this type of common anti-theft chain, it was found that it was difficult for people to determine the specific size of the installation position before installation, so they were installed in a rough position. This resulted in a large gap when the door was opened after installation, which did not provide a good anti-theft effect. It had to be removed and reinstalled later, which brought inconvenience to actual use.

[0004] Therefore, it is necessary to provide a new anti-hotlink mechanism to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-theft chain mechanism which can adjust the size of the gap of a door when it is opened according to the installation position and is easy to operate.

[0006] The cam is fixedly mounted on the support frame, and the cam is connected to the support frame by a toothed connection, and the toothed connection is fixedly mounted on the support frame.

[0007] Preferably, two fixing rods are fixedly mounted on the mounting base, and ends of the two fixing rods are fixedly connected to the arc-shaped sliding sheet.

[0008] Preferably, the upper fixing sleeve of the connecting shaft is provided with two stop sheets, and the movable sheet metal is located between and in contact with the two stop sheets.

[0009] Preferably, the end of the square pulling rod away from the movable sheet metal is fixedly provided with a pulling head, a compression spring is sleeved on the square pulling rod, one end of the compression spring is fixedly connected with the pulling head, and the other end is fixedly connected with the hollow mounting frame.

[0010] Preferably, the movable sheet metal is provided with an arc-shaped sliding groove, and the arc-shaped sliding sheet penetrates through the arc-shaped sliding groove and is in sliding connection with the inner wall of the arc-shaped sliding groove.

[0011] Preferably, the connecting shaft, the arc-shaped sliding sheet, the arc-shaped connecting sheet and the arc-shaped sliding groove are coaxial.

[0012] Preferably, the fixed sheet metal and the mounting base are both provided with two screw holes.

[0013] Compared with the related art, the anti-theft chain mechanism has the following beneficial effects:

[0014] The anti-theft chain mechanism can adjust the spacing between the fixed head and the connecting sliding head according to actual requirements, and can adjust the gap size of the house door when the house door is opened without reinstalling the fixed sheet metal and the mounting base, thereby bringing convenience to actual use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure schematic view of a preferred embodiment of the anti-theft chain mechanism provided by the utility model;

[0016] Figure 2 The assembly schematic view of the movable sheet metal and the mounting base in the utility model;

[0017] Figure 3 The structure schematic view of the connecting shaft in the utility model;

[0018] Figure 4 The connection structure schematic view of the movable sheet metal and the hollow mounting frame in the utility model.

[0019] Marked numbers in the figure: 1, fixed sheet metal; 2, movable sheet metal; 3, mounting base; 4, connecting shaft; 5, straight sliding way; 6, connecting sliding head; 7, fixed head; 8, metal chain; 9, fixed rod; 10, arc-shaped sliding sheet; 11, adjusting clamping groove; 12, hollow mounting frame; 13, arc-shaped connecting sheet; 14, adjustable clamping head; 15, square pulling rod; 16, pulling head; 17, compression spring; 18, stop sheet. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0021] Please refer to Figures 1-4 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of the anti-theft chain mechanism provided by the present invention; Figure 2 This is a schematic diagram of the assembly of the movable sheet metal and the mounting base in the present invention; Figure 3 This is a schematic structural diagram of the connecting shaft in the utility model;

[0022] Figure 4 The figure is a schematic diagram of the connection structure between the movable sheet metal and the hollow mounting frame in the present invention. The anti-theft chain mechanism includes: a fixed sheet metal 1, a movable sheet metal 2 and a mounting base 3. Two screw holes are provided on the fixed sheet metal 1 and the mounting base 3, so that they can be installed and fixed by screws. A connecting shaft 4 is rotatably installed on the mounting base 3. The connecting shaft 4 passes through the movable sheet metal 2 and is fixedly connected to the movable sheet metal 2, so that the movable sheet metal 2 can rotate. A linear slide 5 is provided on the fixed sheet metal 1, in which a connecting slider 6 is slidably installed. A fixed head 7 is fixedly installed on the movable sheet metal 2. The same metal chain 8 is fixedly installed on the connecting slider 6 and the fixed head 7. In order to be able to adjust the size of the gap when the door is opened, two fixed rods 9 are fixedly installed on the mounting base 3. The ends of the two fixed rods 9 are fixedly installed with the same arc-shaped slide 10. The arc-shaped slide 10 passes through the movable sheet metal 2 and is fixedly connected to the movable sheet metal 2. The movable sheet metal 2 is slidably connected, and a plurality of adjustment slots 11 are provided on the arc-shaped slide 10. A hollow mounting frame 12 is fixedly installed on the movable sheet metal 2. A square pull rod 15 is slidably installed on the side of the hollow mounting frame 12 away from the movable sheet metal 2, and an arc-shaped connecting piece 13 is fixedly installed on the end of the square pull rod 15 close to the movable sheet metal 2. Two adjustable clamps 14 are fixedly installed on the side of the arc-shaped connecting piece 13 close to the movable sheet metal 2. The ends of the two adjustable clamps 14 extend into the corresponding adjustment slots 11, so that the movable sheet metal 2 can be fixed. By rotating the movable sheet metal 2 and utilizing the connection between the adjustable clamps 14 and the adjustment slots 11, the distance between the fixed head 7 and the connecting slide 6 can be adjusted according to actual needs, thereby adjusting the size of the door gap without reinstalling the fixed sheet metal 1 and the mounting base 3.

[0023] In the above method, in order to prevent the movable sheet metal 2 from detaching from the connecting shaft 4, two blocking plates 18 are fixedly sleeved on the connecting shaft 4. The movable sheet metal 2 is located between the two blocking plates 18 and contacts the two blocking plates 18, thereby forming a blocking effect.

[0024] In the mode, in order to facilitate people to pull out adjustable card head 14 from the adjusting card slot 11, the square pulling rod 15 is fixedly installed with a pulling head 16 at the end away from the movable sheet metal 2, and the square pulling rod 15 is sleeved with a compression spring 17, one end of the compression spring 17 is fixedly connected with the pulling head 16, and the other end is fixedly connected with the hollow mounting frame 12, by pulling the pulling head 16, the adjustable card head 14 can be pulled out from the adjusting card slot 11, and when the adjustable card head 14 is inserted into the adjusting card slot 11, the compression spring 17 can form a top force on it, so as to ensure the stability of the insertion between the two.

[0025] In the mode, in order to ensure the stable sliding between the movable sheet metal 2 and the arc-shaped sliding sheet 10, an arc-shaped sliding groove is formed on the movable sheet metal 2, the arc-shaped sliding sheet 10 penetrates the arc-shaped sliding groove and is in sliding connection with the inner wall of the arc-shaped sliding groove, and the connecting shaft 4, the arc-shaped sliding sheet 10, the arc-shaped connecting sheet 13 and the arc-shaped sliding groove are coaxial.

[0026] The working principle of the anti-theft chain mechanism is as follows:

[0027] In use, the fixed sheet metal 1 is first fixed on the door panel through screws, and then the mounting base 3 is fixed on the door frame or the wall on one side, and then the door is opened for testing, if the gap is large when the door is opened, the position of the fixed head 7 needs to be adjusted.

[0028] When adjusting, the pulling head 16 is pulled away from the movable sheet metal 2, and the two adjustable card heads 14 are pulled out from the corresponding adjusting card slots 11, at this time, the compression spring 17 is in a stretched state, then the pulling head 16 is held and rotated, the movable sheet metal 2 starts to rotate around the connecting shaft 4, at this time, the distance between the fixed head 7 and the connecting sliding head 6 gradually increases, so that the metal chain 8 is gradually stretched, until the movable sheet metal 2 rotates to the specified position, at this time, the two adjustable card heads 14 correspond to the two adjusting card slots 11, then the pulling head 16 is released, the stretched compression spring 17 automatically releases the elastic force, and the two adjustable card heads 14 are automatically brought into the corresponding adjusting card slots 11, so as to complete the position adjustment of the movable sheet metal 2.

[0029] Then, the door is opened for testing again, at this time, it is found that the gap is smaller when the door is opened, and the normal anti-theft effect is achieved.

[0030] Compared with the related art, the anti-theft chain mechanism has the following beneficial effects:

[0031] The utility model provides a kind of anti-theft chain mechanism, by being provided with the movable metal sheet 2 of being able to rotate, and the plug-in mode between adjusting clamping groove 11 and adjustable chuck 14, it can be according to actual demand adjustment fixed head 7 and the spacing of connecting sliding head 6, further can under the condition of not reinstallation fixed metal sheet 1 and installation base 3, the size of gap when house door is opened is adjusted, bring convenience to actual use.

[0032] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. An anti-theft chain mechanism, comprising a fixed sheet metal, a movable sheet metal and a mounting base, characterized in that: The cam is fixedly mounted on the base, and the cam is connected to the base via a link rod and a coupling member is mounted on the base so as to allow the link rod to move along the cam face and rotate relative to the base, the link rod being connected to the base via a link rod.

2. The anti-theft chain mechanism according to claim 1, characterized in that: Two fixing rods are fixedly mounted on the mounting base, and ends of the two fixing rods are fixedly connected to the arc-shaped sliding sheet.

3. The anti-theft chain mechanism according to claim 1, characterized in that: The upper fixed sleeve of the rotating shaft is provided with two blocking pieces, and the movable sheet metal is located between the two blocking pieces and in contact with the two blocking pieces.

4. The anti-theft chain mechanism according to claim 1, characterized in that: A pulling head is fixedly installed on one end of the square pulling rod away from the movable sheet metal, and a compression spring is sleeved on the square pulling rod. One end of the compression spring is fixedly connected to the pulling head, and the other end is fixedly connected to the hollow mounting frame.

5. The anti-theft chain mechanism according to claim 1, characterized in that: An arcuate chute is provided on the movable sheet metal, and the arcuate slide passes through the arcuate chute and is slidably connected to the inner wall of the arcuate chute.

6. The anti-theft chain mechanism according to claim 5, characterized in that: The rotating shaft, the arc-shaped sliding piece, the arc-shaped connecting piece and the arc-shaped sliding groove are all coaxial.

7. The anti-theft chain mechanism according to claim 1, characterized in that: Two screw holes are provided on the fixing sheet metal and the mounting base.

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