U-shaped film-wrapping edge-folding block and edge-folding mechanism

Abstract

The utility model relates to the technical field of film wrapping and edge folding, and discloses a U-shaped film wrapping and edge folding block and an edge folding mechanism, the edge folding block comprises a push block and a flexible cushion block, the push block has a pushing direction and an edge folding direction, the push block is provided with a fixing part, and the end part of the push block corresponding to the edge folding direction is provided with a first push block end face and a second push block end face; the flexible cushion block is installed on the fixing part in a wrapping mode, at least one side of the flexible cushion block is provided with an edge folding contact face, and the edge, corresponding to the pushing direction, of the edge folding contact face is provided with a guide face, a first diagonal plane and a second diagonal plane. The included angle between the first diagonal plane and the folded edge contact face and the included angle between the second diagonal plane and the folded edge contact face are obtuse angles with openings facing the fixing part. In other words, the first diagonal plane and the second diagonal plane are obliquely arranged in the direction gradually close to the fixing part, the guide face and the two diagonal planes generate pushing force dispersed from the middle to the two sides on the side bottom edge of the insulating film, folded edge wrinkles and bubbles can be squeezed and eliminated, and the film wrapping yield is increased.

Description

Technical Field

[0001] This utility model relates to the field of film wrapping and folding technology, and in particular to a U-shaped film wrapping and folding block and folding mechanism. Background Technology

[0002] Currently, in the production process of square aluminum-cased lithium batteries, the outer film of the aluminum casing body adopts a U-shaped wrapping method. For example, Chinese invention patent application CN115911498A, with publication date of April 4, 2023, discloses a U-shaped wrapping method for square-cased batteries. Specifically, during wrapping, the bottom and left and right large surfaces of the battery are first pasted, the insulating film tape is cut, and then the edge of the insulating film extending outside the front and rear sides of the battery on the bottom or left and right large surfaces is trimmed. Then, according to the trimmed edge position, the insulating film on the bottom or left and right large surfaces of the battery is folded and pasted, then the top surface of the battery is folded and pasted, and finally the top sheet is pasted.

[0003] The U-shaped wrapping process uses a side corner-cutting (or edge-cutting) process, which requires two foldings on the side of the insulating film. The first folding is done by using a roller mechanism to roll and fold the bottom edge of the side corner-cutting opening. Because there is a difference in the straightness of the bottom R-corner and bottom edge of the square aluminum shell, the bottom edge of the wrapping film cannot be completely fitted with the bottom corner plane of the square aluminum shell during the roller rolling, resulting in wrinkles, bubbles and other problems on the side bottom folding, which affects the yield of the battery wrapping process. Utility Model Content

[0004] The technical problem this invention aims to solve is that the bottom edge of the coating cannot be completely aligned with the bottom corner plane of the square aluminum shell during the rolling process, resulting in wrinkles and bubbles on the bottom edge, which affects the yield of the battery coating process.

[0005] To solve the above-mentioned technical problems, this utility model provides a technical solution for a U-shaped wrapping edge block:

[0006] The U-shaped wrapping edge block includes: a push block, the push block having intersecting pushing direction and folding direction, the push block being provided with a fixing part, and the end of the push block corresponding to the folding direction being provided with a first push block end face and a second push block end face;

[0007] A flexible pad is installed on the fixing part, and at least one side of the flexible pad is provided with a folded edge contact surface. The edge of the folded edge contact surface corresponding to the pushing direction is provided with a guide surface, a first oblique surface and a second oblique surface.

[0008] The first beveled surface and the second beveled surface are respectively arranged on both sides of the guide surface. The angle between the first beveled surface and the folded edge contact surface and the angle between the second beveled surface and the folded edge contact surface are both obtuse angles with the opening facing the fixing part.

[0009] Furthermore, the flexible pad includes a pad end face and two spaced-apart folded edge contact surfaces. The pad end face is connected to the edge of the two folded edge contact surfaces corresponding to the pushing direction, and the push block is sandwiched between the two folded edge contact surfaces.

[0010] Furthermore, the push block has a raised edge in the middle, the raised edge extends parallel to the folding direction, and the portion of the push block away from the raised edge along the pushing direction constitutes the fixing part.

[0011] Furthermore, the flexible pad is a PU pad.

[0012] Furthermore, the guide surface is a rounded corner surface that smoothly connects the end face of the pad block and the contact surface of the folded edge.

[0013] Furthermore, the angle between the first beveled surface and the folded edge contact surface, and the angle between the second beveled surface and the folded edge contact surface are both greater than 135°.

[0014] Furthermore, the folded edge contact surface is arranged inclined towards the edge near the convex edge along the pushing direction.

[0015] To solve the above-mentioned technical problems, this utility model also provides a technical solution for a folding mechanism with a U-shaped wrapping folding block:

[0016] The folding mechanism with a U-shaped wrapping folding block includes:

[0017] A jacking mechanism, wherein the jacking mechanism is drivenly connected to a main base, and the main base is movable parallel to the jacking direction;

[0018] A deflection adjustment structure is mounted on the main base, and the deflection adjustment structure has a deflection axis extending parallel to the folded edge direction;

[0019] U-shaped wrapping edge block, wherein the U-shaped wrapping edge block is adjustablely installed at the end of the deflection adjustment structure corresponding to the pushing direction; the U-shaped wrapping edge block includes: a push block, wherein the push block has intersecting pushing direction and folding direction, the push block is provided with a fixing part, and the end of the push block corresponding to the folding direction is provided with a first push block end face and a second push block end face.

[0020] A flexible pad is installed on the fixing part, and at least one side of the flexible pad is provided with a folded edge contact surface. The edge of the folded edge contact surface corresponding to the pushing direction is provided with a guide surface, a first oblique surface and a second oblique surface.

[0021] The first beveled surface and the second beveled surface are respectively arranged on both sides of the guide surface. The angle between the first beveled surface and the folded edge contact surface and the angle between the second beveled surface and the folded edge contact surface are both obtuse angles with the opening facing the fixing part.

[0022] Furthermore, the flexible pad includes a pad end face and two spaced-apart folded edge contact surfaces. The pad end face is connected to the edge of the two folded edge contact surfaces corresponding to the pushing direction, and the push block is sandwiched between the two folded edge contact surfaces.

[0023] Furthermore, the push block has a raised edge in the middle, the raised edge extends parallel to the folding direction, and the portion of the push block away from the raised edge along the pushing direction constitutes the fixing part.

[0024] Furthermore, the flexible pad is a PU pad.

[0025] Furthermore, the guide surface is a rounded corner surface that smoothly connects the end face of the pad block and the contact surface of the folded edge.

[0026] Furthermore, the angle between the first beveled surface and the folded edge contact surface, and the angle between the second beveled surface and the folded edge contact surface are both greater than 135°.

[0027] Furthermore, the folded edge contact surface is arranged inclined towards the edge near the convex edge along the pushing direction.

[0028] Furthermore, a fixing plate is installed on the main base, and a sliding seat is movably installed on the fixing plate. The sliding seat is oriented towards the side of the push block. An elastic element is also provided between the sliding seat and the fixing plate, and the deflection adjustment structure is provided on the sliding seat.

[0029] Furthermore, the deflection adjustment structure is provided with a mounting plate at the end corresponding to the pushing direction, the U-shaped wrapping edge block is adjustablely disposed on the mounting plate, and a first adjusting member extending along the folding direction is connected between the U-shaped wrapping edge block and the mounting plate.

[0030] Compared with the prior art, the U-shaped wrapping edge folding block and folding mechanism of this utility model have the following advantages: the U-shaped wrapping edge folding block adopts the structure of a push block and a flexible pad block. The push block has intersecting pushing direction and folding direction. The push block is provided with a fixing part. The flexible pad block is wrapped and installed on the fixing part. At least one side of the flexible pad block is provided with a folding contact surface. The edge of the folding contact surface corresponding to the pushing direction is provided with a guide surface, a first oblique surface and a second oblique surface.

[0031] During operation, the jacking mechanism drives the main base to move along the jacking direction. The U-shaped wrapping folding block moves synchronously with the main base along the jacking direction, and the deflection angle of the U-shaped wrapping folding block can be flexibly adjusted through the deflection adjustment structure to adapt to the wrapping folding requirements of different square shells. As the folding block moves along the jacking direction, the folding contact surface of the flexible pad moves towards the side of the square shell, and the edge of the folding contact surface will first contact the bottom edge of the insulating film. With the advancing action, the bottom edge is gradually folded onto the side of the square shell, and through the friction and compression between the folding contact surface and the side of the square shell, the bottom edge of the insulating film is completely adhered to the position.

[0032] Furthermore, the edge of the folded contact surface is provided with a guide surface corresponding to the pushing direction, as well as a first oblique surface and a second oblique surface arranged on both sides of the guide surface. The included angles between the first oblique surface and the folded contact surface, and between the second oblique surface and the folded contact surface, are both obtuse angles with the opening facing the fixing part. That is, the first oblique surface and the second oblique surface are both arranged at an angle gradually approaching the fixing part. The guide surface in the middle can guide the flexible pad to smoothly adhere to the side of the square shell. The guide surface, together with the first oblique surface and the second oblique surface on both sides, forms a shape that is high in the middle and low on both sides, which further generates a pushing force that is distributed from the middle to both sides on the bottom edge of the insulating film. This can effectively adapt to different bottom corner straightness and R angle, and can also eliminate folded wrinkles and air bubbles, thereby improving the coating yield. Attached Figure Description

[0033] Figure 1 This is a three-dimensional schematic diagram of the U-shaped wrapping edge block in an embodiment of this utility model;

[0034] Figure 2 This is a side view of the U-shaped wrapping edge block in an embodiment of this utility model;

[0035] Figure 3 This is a three-dimensional schematic diagram of the folding mechanism with a U-shaped wrapping folding block in an embodiment of this utility model;

[0036] In the figure: 1-Push block, 10-Fixing part, 11-First push block end face, 12-Second push block end face, 13-Protruding edge, 14-Connecting hole, 2-Flexible pad, 20-Folded edge contact surface, 21-Guide surface, 22-First oblique cut surface, 23-Second oblique cut surface, 24-Pad end face, 3-Pushing mechanism, 30-Main base, 31-Linear guide rail, 32-Fixing plate, 33-Sliding seat, 34-Elastic element, 35-Adjusting screw, 4-Deflection adjustment structure, 40-Mounting plate, 41-First adjusting element, 42-Arc-shaped mounting hole, 43-Oval hole, 5-U-shaped wrapped folded edge block, X-Pushing direction, Y-Folded edge direction. Detailed Implementation

[0037] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0038] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] like Figure 1 , Figure 2 As shown, a U-shaped wrapping edge block according to an embodiment of the present invention includes: a push block 1 and a flexible pad block 2. The push block 1 has intersecting pushing direction X and folding direction Y. The push block 1 is provided with a fixing part 10. The end of the push block 1 corresponding to the folding direction Y is provided with a first push block end face 11 and a second push block end face 12. The flexible pad block 2 is wrapped and installed on the fixing part 10. At least one side of the flexible pad block 2 is provided with a folding contact surface 20. The edge of the folding contact surface 20 corresponding to the pushing direction X is provided with a guide surface 21, a first oblique surface 22 and a second oblique surface 23.

[0042] The first oblique surface 22 and the second oblique surface 23 are respectively arranged on both sides of the guide surface 21. The angle between the first oblique surface 22 and the folded edge contact surface 20 and the angle between the second oblique surface 23 and the folded edge contact surface 20 are both obtuse angles with the opening facing the fixing part 10.

[0043] The U-shaped wrapping edge block adopts the structure of push block 1 and flexible pad block 2. Push block 1 has intersecting pushing direction X and edge folding direction Y. Push block 1 is provided with a fixing part 10. Flexible pad block 2 is wrapped and installed on the fixing part 10. At least one side of flexible pad block 2 is provided with edge folding contact surface 20. Edge folding contact surface 20 is provided with guide surface 21, first oblique surface 22 and second oblique surface 23 at the edge corresponding to the pushing direction X.

[0044] During operation, the folding block moves forward in the pushing direction X, and the folding contact surface 20 of the flexible pad 2 moves towards the side of the square shell. The edge of the folding contact surface 20 will first contact the bottom edge of the insulating film. As the pushing action continues, the bottom edge is gradually folded onto the side of the square shell. Through the friction and squeezing action between the folding contact surface 20 and the side of the square shell, the bottom edge of the insulating film is completely adhered to the position.

[0045] Furthermore, the edge of the folded contact surface 20 is provided with a guide surface 21 at the edge corresponding to the pushing direction X, and a first oblique surface 22 and a second oblique surface 23 are arranged on both sides of the guide surface 21. The angle between the first oblique surface 22 and the folded contact surface 20 and the angle between the second oblique surface 23 and the folded contact surface 20 are both obtuse angles with the opening facing the fixing part 10. That is, the first oblique surface 22 and the second oblique surface 23 are both arranged at an angle that gradually approaches the fixing part 10.

[0046] The guide surface 21 in the middle can guide the flexible pad 2 to smoothly adhere to the side of the square shell. The guide surface 21, together with the first oblique surface 22 and the second oblique surface 23 on both sides, form a shape that is high in the middle and low on both sides. This further generates a pushing force that is distributed from the middle to both sides on the bottom edge of the insulating film. It can effectively adapt to different bottom corner straightness and R angle, and can also eliminate edge wrinkles and air bubbles, thus improving the coating yield.

[0047] In this embodiment, the flexible pad 2 includes a pad end face 24 and two spaced-apart folded edge contact surfaces 20. The pad end face 24 is connected to the edge of the two folded edge contact surfaces 20 corresponding to the pushing direction X. The push block 1 is sandwiched between the two folded edge contact surfaces 20. The two folded edge contact surfaces 20 of the flexible pad 2 can be used to squeeze and bond the bottom edges of the insulating film in two opposite directions.

[0048] Specifically, the push block 1 has a raised edge 13 in the middle, which extends parallel to the folding direction Y. The portion of the push block 1 away from the raised edge 13 along the pushing direction X constitutes the fixing part 10. The raised edge 13 in the middle of the push block 1 can limit the flexible pad 2 along the pushing direction X, ensuring that the position of the flexible pad 2 remains reliable even after repeated folding and pasting. As a further preferred embodiment, the flexible pad 2 is a PU pad, made of 35SH.A PU material. This material is soft and can better conform to the side of the square shell during contact, effectively avoiding folding wrinkles and air bubbles.

[0049] The guide surface 21 is a rounded corner surface that smoothly connects the end face 24 of the pad block and the folded edge contact surface 20. The guide surface 21 adopts a rounded corner design, which allows it to smoothly transition from the bottom side of the square shell to the side position during the pushing process. The included angles between the first oblique surface 22 and the folded edge contact surface 20, and between the second oblique surface 23 and the folded edge contact surface 20, are both greater than 135°, ensuring that the two oblique surfaces can slowly generate a pushing force that is dispersed to both sides. The folded edge contact surface 20 is inclined towards the edge close to the convex edge 13 along the pushing direction X, which can gradually increase the frictional pressing force between the folded edge contact surface 20 and the side of the square shell during the pushing process.

[0050] like Figure 3 As shown in the figure, a folding mechanism with a U-shaped wrapping folding block according to an embodiment of the present invention includes: a pushing mechanism 3, a deflection adjustment structure 4, and a U-shaped wrapping folding block 5. The pushing mechanism 3 is drivenly connected to a main base 30, and the main base 30 is movably arranged parallel to the pushing direction X. The deflection adjustment structure 4 is installed on the main base 30 and has a deflection axis extending parallel to the folding direction Y. The U-shaped wrapping folding block 5 is adjustablely installed at the end of the deflection adjustment structure 4 corresponding to the pushing direction X.

[0051] The U-shaped wrapping edge block 5 is the same as the U-shaped wrapping edge block in the above embodiment, and it includes a push block 1 and a flexible pad block 2, such as... Figure 1 , Figure 2 As shown, the push block 1 has intersecting pushing direction X and folding direction Y. The push block 1 is provided with a fixing part 10. The end of the push block 1 corresponding to the folding direction Y is provided with a first push block end face 11 and a second push block end face 12. The flexible pad 2 is covered and installed on the fixing part 10. At least one side of the flexible pad 2 is provided with a folding contact surface 20. The edge of the folding contact surface 20 corresponding to the pushing direction X is provided with a guide surface 21, a first oblique surface 22 and a second oblique surface 23.

[0052] The first oblique surface 22 and the second oblique surface 23 are respectively arranged on both sides of the guide surface 21. The angle between the first oblique surface 22 and the folded edge contact surface 20 and the angle between the second oblique surface 23 and the folded edge contact surface 20 are both obtuse angles with the opening facing the fixing part 10.

[0053] During operation, the jacking mechanism 3 drives the main base 30 to move along the jacking direction X. The U-shaped wrapping folding block 5 moves synchronously with the main base 30 along the jacking direction X. The deflection angle of the U-shaped wrapping folding block 5 can be flexibly adjusted by the deflection adjustment structure 4 to adapt to the wrapping folding requirements of different square shells. As the folding contact surface 20 of the flexible pad 2 moves towards the side of the square shell, the edge of the folding contact surface 20 will first contact the bottom edge of the insulating film. With the pushing action, the bottom edge is gradually folded onto the side of the square shell. The friction and squeezing action between the folding contact surface 20 and the side of the square shell makes the bottom edge of the insulating film completely adhered to the position.

[0054] Furthermore, the edge of the folded contact surface 20 corresponding to the pushing direction X is provided with a guide surface 21, and a first oblique cut surface 22 and a second oblique cut surface 23 arranged on both sides of the guide surface 21. The included angle between the first oblique cut surface 22 and the folded contact surface 20, and the included angle between the second oblique cut surface 23 and the folded contact surface 20 are both obtuse angles with the opening facing the fixing part 10. That is, the first oblique cut surface 22 and the second oblique cut surface 23 are both arranged obliquely in the direction of gradually approaching the fixing part 10. The guide surface 21 in the middle can guide the flexible pad 2 to smoothly adhere to the side of the square shell. The guide surface 21 and the first oblique cut surface 22 and the second oblique cut surface 23 on both sides form a shape that is high in the middle and low on both sides, which further generates a pushing force that is distributed from the middle to both sides on the side bottom edge of the insulating film. This can effectively adapt to different bottom corner straightness and R angle, and can also eliminate folded wrinkles and air bubbles, thereby improving the coating yield.

[0055] It should be noted that the jacking mechanism 3 is a single-axis cylinder connected to the main base 30. The main base 30 is moved parallel to the jacking direction X through the sliding cooperation of the slider and the linear guide rail. In addition, an adjusting screw 35 is installed between the fixed plate 32 and the main base 30. Before the folding action, the front and rear positions of the fixed plate 32 relative to the main base 30 can be adjusted by adjusting the adjusting screw 35, and the fixed plate 32 is tightened with M5 screws after the adjustment is in place.

[0056] In this embodiment, a fixing plate 32 is mounted on the main base 30, and a sliding seat 33 is movably mounted on the fixing plate 32. The sliding seat 33 is oriented towards the side of the push block 1. An elastic element 34 is also provided between the sliding seat 33 and the fixing plate 32, and a deflection adjustment structure 4 is provided on the sliding seat 33. The elastic element 34 between the sliding seat 33 and the fixing plate 32 can buffer the pushing force between the folded edge block and the square shell, avoiding deformation of the square shell due to excessive pushing force, and also extending the service life of the flexible pad 2.

[0057] Furthermore, the deflection adjustment structure 4 is provided with an arc-shaped mounting hole 42. The deflection adjustment structure 4 is fixed to the sliding seat 33 by the arc-shaped mounting hole 42 and an M4 screw. The axis of the arc-shaped mounting hole 42 is arranged along the folding direction Y. The length direction of the arc-shaped mounting hole 42 extends in an arc shape in a plane perpendicular to the folding direction Y, thereby realizing the purpose of flexibly adjusting the deflection angle of the U-shaped wrapping folding block 5.

[0058] As a further preferred embodiment, the deflection adjustment structure 4 is provided with a mounting plate 40 at the end corresponding to the pushing direction X. The U-shaped wrapping folding block 5 is adjustablely mounted on the mounting plate 40, and a first adjusting member 41 extending along the folding direction Y connects the U-shaped wrapping folding block 5 and the mounting plate 40. Specifically, the first adjusting member 41 is also a screw, which can be used to adjust the vertical position of the U-shaped wrapping folding block 5 relative to the mounting plate 40. In addition, the mounting plate 40 has a waist-shaped hole 43, the length direction of which is parallel to the folding direction Y. The push block 1 of the U-shaped wrapping folding block 5 has a connecting hole 14, and screws are installed in the waist-shaped hole 43 and the connecting hole 14 to fix the position of the U-shaped wrapping folding block 5 on the mounting plate 40.

[0059] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A U-shaped wrapping edge block, characterized in that, include: Push block (1), the push block (1) has intersecting pushing direction (X) and folding direction (Y), the push block (1) is provided with a fixing part (10), and the end of the push block (1) corresponding to the folding direction (Y) is provided with a first push block end face (11) and a second push block end face (12). Flexible pad (2), the flexible pad (2) is covered and installed on the fixing part (10), at least one side of the flexible pad (2) is provided with a folded edge contact surface (20), the folded edge contact surface (20) is provided with a guide surface (21), a first oblique surface (22) and a second oblique surface (23) corresponding to the edge of the pushing direction (X). The first oblique surface (22) and the second oblique surface (23) are respectively arranged on both sides of the guide surface (21). The angle between the first oblique surface (22) and the folded edge contact surface (20) and the angle between the second oblique surface (23) and the folded edge contact surface (20) are both obtuse angles with the opening facing the fixing part (10).

2. The U-shaped wrapping edge block according to claim 1, characterized in that, The flexible pad (2) includes a pad end face (24) and two spaced-apart folded contact surfaces (20). The pad end face (24) is connected to the edge of the two folded contact surfaces (20) corresponding to the pushing direction (X). The push block (1) is sandwiched between the two folded contact surfaces (20).

3. The U-shaped wrapping edge block according to claim 1, characterized in that, The push block (1) has a raised edge (13) in the middle, the raised edge (13) extends parallel to the folding direction (Y), and the part of the push block (1) away from the raised edge (13) along the pushing direction (X) constitutes the fixing part (10).

4. The U-shaped wrapping edge block according to claim 1, characterized in that, The flexible pad (2) is a PU pad.

5. The U-shaped wrapping edge block according to claim 2, characterized in that, The guide surface (21) is a rounded corner surface that is smoothly connected between the end face (24) of the pad block and the folded edge contact surface (20).

6. The U-shaped wrapping edge block according to claim 1, characterized in that, The angle between the first oblique cut surface (22) and the folded edge contact surface (20), and the angle between the second oblique cut surface (23) and the folded edge contact surface (20) are both greater than 135°.

7. The U-shaped wrapping edge block according to claim 3, characterized in that, The folded contact surface (20) is arranged at an angle toward the edge close to the convex edge (13) along the pushing direction (X).

8. A folding mechanism comprising a U-shaped wrapping folding block as described in any one of claims 1 to 7, characterized in that, include: The jacking mechanism (3) is connected to the main base (30) and the main base (30) is moved parallel to the jacking direction (X); A deflection adjustment structure (4) is mounted on the main base (30) and has a deflection axis that extends parallel to the folding direction (Y). U-shaped wrapping edge block (5), which is adjustablely installed at the end of the deflection adjustment structure (4) corresponding to the pushing direction (X).

9. The folding mechanism according to claim 8, characterized in that, A fixing plate (32) is installed on the main base (30), and a sliding seat (33) is movably installed on the fixing plate (32). The sliding seat (33) is oriented toward the side of the push block (1). An elastic element (34) is also provided between the sliding seat (33) and the fixing plate (32). The deflection adjustment structure (4) is provided on the sliding seat (33).

10. The folding mechanism according to claim 8, characterized in that, The deflection adjustment structure (4) is provided with a mounting plate (40) at the end corresponding to the pushing direction (X). The U-shaped wrapping edge block (5) is adjustablely mounted on the mounting plate (40), and a first adjustment member (41) extending along the folding direction (Y) is connected between the U-shaped wrapping edge block (5) and the mounting plate (40).

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