Sheet metal connecting structure with automatic locking

Abstract

The application discloses a metal sheet connecting structure with automatic lock catch, which is characterized in that a plug hole is arranged at the bottom edge of the trapezoidal connecting surface of a first metal sheet, a plug corresponding to the plug hole is arranged on the connecting edge of a second metal sheet, and a plurality of automatic lock catches are additionally arranged on the trapezoidal connecting surface. The automatic lock catch comprises a main body, a fixed plug I and a fixed plug II arranged on the two sides of the main body. After the fixed plug I and the fixed plug II are inserted into the clamping groove I and the clamping groove II of the trapezoidal connecting surface, the main body is inclined relative to the trapezoidal connecting surface. The end of the trapezoidal connecting surface is provided with a fold line F and a fold piece, and the fold piece is used for assisting in fixing the fixed plug II. The main body is provided with a trapezoidal groove, and the trapezoidal groove is matched and connected with the trapezoidal fixed head at the end of the plug. The application adds an automatic lock catch, and utilizes the lever principle to firmly connect the two metal sheets. The trapezoidal fixed head is elastically inserted into the trapezoidal groove of the automatic lock catch due to the elasticity of the metal sheet, so that the lock catch is prevented from being released. The connecting operation is convenient, the connection is tight and firm, and the metal sheet connecting structure can be mass-produced.

Description

Technical Field

[0001] This invention relates to the field of metal sheet manufacturing, and more specifically to a metal sheet connection structure with an automatic locking mechanism. Background Technology

[0002] Currently, metal sheet products such as models, components, arts and crafts, and certain industrial products are made by connecting several metal sheets. Existing connection methods typically include welding, bonding, and snap-fit ​​connections. When welding, a weld seam is inevitably left at the joint of the two metal sheets. The weld scars and potential deformation and discoloration during the welding process can severely affect the appearance. When bonding, the joint of the two metal sheets is easily contaminated by the adhesive, also affecting the appearance, or uneven adhesive application can lead to delamination. Snap-fit ​​connections overcome these problems. Existing snap-fit ​​connections involve pre-setting a trapezoidal connecting surface at the joint edge of the two metal sheets, and setting a connecting piece on the edge of the trapezoidal connecting surface of one of the metal sheets. During connection, the connecting piece is...

[0003] The trapezoidal connecting surface of one metal sheet is bent and hooked onto another metal sheet. This connection method has the following shortcomings: (1) the connection is not tight, (2) the seam is obvious, and (3) in particular, the metal sheets of finished metal products may become loose or slightly displaced, which affects the product quality.

[0004] Chinese utility model patent ZL201720382466.1 discloses a metal sheet connection structure for connecting and fixing thin metal sheets. Its advantage is a neat and tight connection, which is automatically fixed by simply inserting the clip into the slot and bending it. However, fixing requires manual bending from the reverse side of the metal sheet to secure the clip, which is very inconvenient in actual manufacturing, especially for products with limited or complex internal spaces, where manual bending from the inside is difficult. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a metal sheet connection structure with an automatic locking buckle. An automatic locking buckle is added, and the main body of the automatic locking buckle is inclined relative to the trapezoidal connecting surface of the metal sheet. The two metal sheets are firmly connected by lever principle. The trapezoidal fixing head is inserted into the trapezoidal groove of the automatic locking buckle due to the elasticity of the metal sheet itself, which prevents disengagement. The connection operation is convenient, the connection is tight and firm, and it can be mass-produced.

[0006] The technical solution adopted by this invention to solve the technical problem is: a metal sheet connection structure with automatic locking, wherein the connection is a mountain-fold or valley-fold connection of two metal sheets at the connecting edge, wherein the connecting edge of the first metal sheet has a trapezoidal connecting surface, the bottom edge of the trapezoidal connecting surface is connected to the connecting edge, a fold line A is provided between the trapezoidal connecting surface and the connecting edge, an insertion hole is provided at the bottom edge of the trapezoidal connecting surface, an insertion piece corresponding to the insertion hole is provided on the connecting edge of the second metal sheet, a fold line B is provided between the insertion piece and the connecting edge, and a plurality of automatic locking buckles are added to the trapezoidal connecting surface. The fastener includes a main body, two fixing inserts (I and II) on both sides of the main body, and a fold line between the main body and the fixing inserts (I and II). The trapezoidal connecting surface has slots (I and II) that match and engage with the fixing inserts (I and II). After the fixing inserts (I and II) are inserted into the slots (I and II) of the trapezoidal connecting surface, the main body forms an inclined plane relative to the trapezoidal connecting surface. The end of the trapezoidal connecting surface has a fold line (F) and a fold piece to assist in the connection of the fixing inserts (II). The main body has a trapezoidal groove that matches and connects with the trapezoidal fixing head at the end of the insert.

[0007] As a further improvement, the outer side of the fixing insert II is set to be arc-shaped.

[0008] As a preferred embodiment, the distance between two adjacent automatic latches added to the trapezoidal connecting surface is 5 to 8 mm.

[0009] As a preferred embodiment, the bending angle of the folding auxiliary fixing insert II is 45-60° when connected.

[0010] As a further improvement, a semi-etched groove is provided at the connection edge between the insertion hole and the first metal sheet, and a semi-etched groove is also provided at the connection edge between the insertion piece and the second metal sheet.

[0011] As a preferred embodiment, the mountain fold line in the mountain fold connection or valley fold connection is located on the reverse side of the metal sheet, and the valley fold line is located on the front side of the metal sheet.

[0012] The beneficial effects of this invention are as follows: An automatic locking mechanism is added. The main body of the automatic locking mechanism is inclined relative to the trapezoidal connecting surface of the metal sheet. Through the lever principle, the two metal sheets are firmly connected. The trapezoidal fixing head will spring into the trapezoidal groove of the automatic locking mechanism due to the elasticity of the metal sheet itself, preventing disengagement. It can be mass-produced, with a strong and tight connection and small seams. It is widely applicable to the manufacture of models, devices, arts and crafts, and certain industrial products. The metal sheet products have an aesthetically pleasing appearance and excellent quality. The outer side of the fixing insert II is set with an arc shape, making the up-and-down movement of the folding piece smoother during insertion and less prone to jamming. Semi-etched grooves are provided at the connecting edges of the insertion hole and metal sheet one, as well as at the connecting edges of the insert and metal sheet two, resulting in better fit and a smooth surface after the two metal sheets are connected. Attached Figure Description

[0013] Figure 1 This is a front view of a metal sheet according to an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the rear of the metal sheet according to an embodiment of the present invention.

[0015] Figure 3 This is a front view of the automatic locking mechanism according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the rear of the automatic locking mechanism according to an embodiment of the present invention.

[0017] Figure 5 This is a front view of the metal sheet two in an embodiment of the present invention.

[0018] Figure 6 This is a schematic diagram of the rear of metal sheet two according to an embodiment of the present invention.

[0019] Figure 7 This is a schematic diagram of the overall installation according to an embodiment of the present invention.

[0020] Figure 8 This is a schematic diagram of the installation of the automatic locking insert metal piece according to an embodiment of the present invention.

[0021] Figure 9 This is a schematic diagram of the structure after installation in an embodiment of the present invention. Figure 1 .

[0022] Figure 10 This is a schematic diagram of the structure after installation in an embodiment of the present invention. Figure 2 .

[0023] Figure 11 This is a schematic diagram of the structure after installation in an embodiment of the present invention. Figure 3 .

[0024] Among them, 1. Trapezoidal connecting surface; 2. Fold line A; 3. Insertion hole; 4. Insert piece; 5. Fold line B; 6. Main body; 7. Fixing insert piece I; 8. Fixing insert piece II; 9. Slot I; 10. Slot II; 11. Fold line F; 12. Fold piece; 13. Trapezoidal groove; 14. Trapezoidal fixing head; 15. Fold line C; 16. Fold line D; 17. Metal sheet one; 18. Metal sheet two; 19. Groove.

[0025] The invention will now be further described with reference to the accompanying drawings. Detailed Implementation

[0026] Combined with appendix Figure 1-8As shown, a metal sheet connection structure with automatic locking is disclosed. The connection is a zigzag or valley-zigzag connection between two metal sheets at the connecting edge. Metal sheet 17 has a trapezoidal connecting surface 1 on its connecting edge, with the bottom edge of the trapezoidal connecting surface 1 connected to the connecting edge. A zigzag line A2 is provided between the trapezoidal connecting surface 1 and the connecting edge. An insertion hole 3 is provided at the bottom edge of the trapezoidal connecting surface 1. Metal sheet 18 has an insertion piece 4 corresponding to the insertion hole 3 on its connecting edge, with a zigzag line B5 between the insertion piece 4 and the connecting edge of the metal sheet 17 and the insertion piece 4 and the metal sheet 18, respectively. Semi-etched grooves 19 are provided at the connecting edge of the insertion hole 3 and the metal sheet 17, and at the connecting edge of the insertion piece 4 and the metal sheet 18. Two automatic locking latches are added to the trapezoidal connecting surface 1, with a distance of 5-8 mm between adjacent automatic locking latches. The automatic locking latch includes a main body 6, fixing inserts I 7 and II 8 on both sides of the main body 6, with the outer side of the fixing insert II 8 being arc-shaped. A fold line C15 is provided between the main body 6 and the fixing insert I7, and a fold line D16 is provided between the main body 6 and the fixing insert II8. The trapezoidal connecting surface 1 is provided with slots I9 and II10 that match and insert the fixing inserts I7 and II8. After the fixing inserts I7 and II8 are inserted into the slots I9 and II10 of the trapezoidal connecting surface 1, the main body 6 is inclined relative to the trapezoidal connecting surface 1. The end of the trapezoidal connecting surface 1 is provided with a fold line F11 and a fold piece 12, which assists in the connection of the fixing insert II at a bending angle of 45°. The main body 6 is provided with a trapezoidal groove 13, which matches and connects with the trapezoidal fixing head 14 at the end of the insert 4.

[0027] When actually connecting the two metal pieces, bend the fixing inserts I7 and II8 of the automatic locking mechanism to 90°, and bend the folding piece 12 downwards at 45°. Insert the fixing inserts I7 and II8 into the slots I9 and II10 of the trapezoidal connecting surface 1 of the metal piece 17, making the main body 6 inclined relative to the trapezoidal connecting surface 1. Then fold the folding piece 12 back to its original position to prevent the automatic locking mechanism from slipping out of the slots. Next, insert the insert 4 of the metal piece 218 into the insertion hole 3 of the metal piece 17. Using the lever principle, the two metal pieces are firmly connected. The trapezoidal fixing head 14 springs into the trapezoidal groove 13 of the automatic locking mechanism due to the elasticity of the metal piece itself, preventing disengagement. See attached diagram after connection. Figure 9 , 10 And 11.

Claims

1. A metal sheet connection structure with an automatic locking mechanism, wherein the connection is a mountain-fold or valley-fold connection of two metal sheets at the connecting edge, wherein the connecting edge of the first metal sheet (17) is provided with a trapezoidal connecting surface (1), the bottom edge of the trapezoidal connecting surface (1) is connected to the connecting edge, a fold line A (2) is provided between the trapezoidal connecting surface (1) and the connecting edge, an insertion hole (3) is provided at the bottom edge of the trapezoidal connecting surface (1), and an insertion piece (4) corresponding to the insertion hole (3) is provided on the connecting edge of the second metal sheet (18), a fold line B (5) is provided between the insertion piece (4) and the connecting edge, characterized in that: Several automatic latches are added to the trapezoidal connecting surface (1). The automatic latches include a main body (6), fixing inserts I (7) and II (8) on both sides of the main body (6). A zigzag line is provided between the main body (6) and the fixing inserts I (7) and II (8). The trapezoidal connecting surface (1) is provided with slots I (9) and II (10) that match and insert the fixing inserts I (7) and II (8). After inserting the slots I (9) and II (10) of the trapezoidal connecting surface (1), the main body (6) is inclined relative to the trapezoidal connecting surface (1); the end of the trapezoidal connecting surface (1) is provided with a fold line F (11) and a fold piece (12) to assist in the connection of the fixing insert II; the main body (6) is provided with a trapezoidal groove (13), and the trapezoidal groove (13) is matched and connected with the trapezoidal fixing head (14) at the end of the insert (4); the outer side of the fixing insert II (8) is set as an arc shape; The connection edge between the insertion hole (3) and the metal sheet one (17) is provided with a semi-etched groove, and the connection edge between the insertion piece (4) and the metal sheet two (18) is also provided with a semi-etched groove.

2. The metal sheet connection structure with automatic locking as described in claim 1, characterized in that: The distance between two adjacent automatic latches added to the trapezoidal connecting surface (1) is 5-8 mm.

3. The metal sheet connection structure with automatic locking as described in claim 1, characterized in that: The bending angle of the folding piece (12) when it assists in fixing the insert piece II (8) is 45-60°.

4. The metal sheet connection structure with automatic locking as described in claim 1, characterized in that: The mountain fold line in the mountain fold connection or valley fold connection is set on the reverse side of the metal sheet, and the valley fold line is set on the front side of the metal sheet.

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