Mylar sheet structure and notebook computer

Abstract

The utility model relates to a die -cutting technical field especially, it relates to a melinex piece structure and notebook computer through changing the shape of the die -cutting break, has strengthened the integrity of melinex piece, can avoid the first die -cutting break and the second die -cutting break of tearing melinex piece's release paper when tear melinex piece of production line, still can avoid the die -cutting break position of melinex piece when production line operation is up to hot melt preheating plate, causes melinex piece to melt and destroy, improve the wrapping of convex simultaneously, avoid the convex of keyboard backboard direct contact mainboard and cause short circuit when melinex piece is up, influence product yield, use two L type's break die -cutting mode to make the die -cutting break of melinex piece, can effectively solve the problem of die -cutting break overall height difference, avoid die -cutting break to attach the uneven bad phenomenon, in addition, compared with the existing annular die -cutting break and U type die -cutting break, since the first die -cutting break and the second die -cutting break of L type are linear motion when processing, the processing difficulty is lower.

Description

Technical Field

[0001] This utility model relates to the field of die-cutting technology, and in particular to a Mylar sheet structure and a laptop computer. Background Technology

[0002] Mylar film is an insulating material made from polyester film as its base material. It possesses excellent electrical insulation properties, mechanical strength, and chemical corrosion resistance, and effectively prevents electrostatic discharge (ESD) breakdown. In laptops, Mylar film is typically placed over the CPU (Central Processing Unit) to prevent damage to critical electronic components from static electricity from users' fingers. The Mylar film must be designed with a specific shape according to the device structure; punching ensures precise dimensional matching and avoids installation errors.

[0003] Currently, during the punching process of Mylar film, the punching cut may lift up and hit the hot melt preheating plate, causing the Mylar film to melt and burn. At the same time, during the assembly of the whole machine, the Mylar film may lift up and cause the protrusion of the keyboard back plate to directly contact the motherboard, causing a short circuit and affecting the product yield. Utility Model Content

[0004] This utility model provides a Mylar sheet structure and a laptop computer to solve the technical problem of Mylar sheets curling up during punching.

[0005] This utility model provides a Mylar sheet structure, which is located between a convex bulge of a keyboard backplate and a PCB board. The keyboard backplate has a convex bulge on the side facing the Mylar sheet. The Mylar sheet structure includes: a Mylar sheet body, on which multiple punching openings are provided. The punching openings include a first punching opening and a second punching opening, both of which are L-shaped and together form a rectangle. The first punching opening includes a first long side and a first short side, and the second punching opening includes a second long side and a second short side. The first end of the first short side is connected to the first end of the first long side, and the first end of the second short side is connected to the first end of the second long side. The second end of the first short side is located on the extension line of the line containing the second long side. The second end of the first short side is located on the line containing the first short side. The second end of the second short side is located on the line containing the second short side. The second end of the second short side is located on the extension line of the line containing the first long side. There is a first distance L1 between the second end of the first short side and the second end of the second long side along the first direction. There is a second distance L2 between the second end of the second short side and the second end of the first long side along the first direction. The first distance and the second distance are equal. The first direction is the extension direction of the lines containing the first long side and the second long side.

[0006] In one embodiment of the present invention, at least one of the connection points of the first long side and the first short side and the connection points of the second long side and the second short side is a rounded corner.

[0007] In one embodiment of this utility model, the connection between the first long side and the first short side and the connection between the second long side and the second short side are both rounded corners.

[0008] In one embodiment of this utility model, both the first spacing and the second spacing are greater than or equal to 1 mm.

[0009] In one embodiment of this utility model, both the first spacing and the second spacing are greater than 2 mm.

[0010] In one embodiment of the present invention, along the first direction, the first spacing is L1, the distance between the first end of the first long side and the second end of the second short side is L3, and L1 / L3≥1 / 8.

[0011] In one embodiment of the present invention, along the first direction, the first spacing is L1, the distance between the first end of the first long side and the second end of the second short side is L3, and 2 / 7≤L1 / L3≤4 / 5.

[0012] In one embodiment of the present invention, the area of ​​the rectangle formed by the first punching opening and the second punching opening is 3 / 20 to 8 / 50 of the cross-sectional area of ​​the convex hull along the first direction.

[0013] In one embodiment of the present invention, the length of the first short side, the length of the second short side, the sum of the length of the first long side and the first spacing, and the sum of the length of the second long side and the second spacing are all equal.

[0014] This utility model also provides a laptop computer, which includes the above-described Mylar sheet structure.

[0015] The beneficial effects of this utility model are: 1. By changing the shape of the punching rip, the integrity of the Mylar sheet is enhanced, which can prevent the first and second punching rips of the Mylar sheet from being torn when the release paper of the Mylar sheet is torn on the production line. 2. It can also prevent the Mylar film from lifting up at the punching and breaking point during production line operation and hitting the hot melt preheating plate, causing the Mylar film to melt and be destroyed; at the same time, it improves the wrapping of the protrusion, preventing the Mylar film from lifting up and causing the protrusion of the keyboard back plate to directly contact the motherboard, causing a short circuit and affecting the product yield. 3. Using two L-shaped punching methods to create the punching openings of Mylar tablets can effectively solve the problem of overall height difference in the punching openings and avoid uneven adhesion of the punching openings; 4. In addition, compared with the existing annular punching cut and U-shaped punching cut, the L-shaped first and second punching cuts are processed in a linear motion, making them easier to process. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the Mylar sheet structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the punching and breaking structure provided in one embodiment of the present utility model; Figure 3 This is a schematic diagram of the punching and breaking structure provided in another embodiment of the present invention.

[0018] The attached figures are labeled as follows: 1-Meila sheet body; 2-punching opening; 21-first punching opening; 21a-first long side; 21b-first short side; 22-second punching opening; 22a-second long side; 22b-second short side; L1-first spacing; L2-second spacing. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0022] Please see Figure 1 and Figure 2 , Figure 1 The Mylar sheet structure provided in one embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, the Mylar sheet is located between the bulge of the keyboard backplate and the PCB board (printed circuit board). The side of the keyboard backplate that contacts the Mylar sheet has a bulge. The Mylar sheet structure includes a Mylar sheet body 1, on which multiple punching holes 2 are provided. The punching holes 2 include a first punching hole 21 and a second punching hole 22, both of which are L-shaped and together form a rectangle. The first punching hole 21 includes a first long side 21a and a first short side 21b connected together. The second punching hole 22 includes a second long side 22a and a second short side 22b connected together. The first long side 21a, the first short side 21b, the second long side 22a, and the second short side 22b are all straight lines. The first end of the first short side 21b is connected to the first end of the first long side 21a, and the first end of the second short side 22b is connected to the first end of the second long side 22a. The second end of the first short side 21b is located on the extension line of the straight line containing the second long side 22a.

[0023] The second end of the second short side 22b is located on the extension line of the first long side 21a. The second end of the first short side 21b is located on the line of the first short side 21b. The second end of the second short side 22b is located on the line of the second short side 22b. There is a first distance L1 between the second end of the first short side 21b and the second end of the second long side 22a along the first direction. There is a second distance L2 between the second end of the second short side 22b and the second end of the first long side 21a along the first direction. The first distance L1 and the second distance L2 are equal. The first direction is the extension direction of the line of the first long side 21a and the line of the second long side 22a.

[0024] Specifically, the PCB board, which is the CPU motherboard of a laptop, has a punching opening 2 including a first punching opening 21 and a second punching opening 22. Both the first punching opening 21 and the second punching opening 22 are L-shaped and together form a rectangle. The first punching opening 21 includes a first long side 21a and a first short side 21b connected together, and the second punching opening 22 includes a second long side 22a and a second short side 22b connected together. The first long side 21a and the first short side 21b are perpendicular to each other, and the second long side 22a and the second short side 22b are also perpendicular to each other; the first long side 21a and the second long side 22a are parallel to each other, and the first short side 21b and the second short side 22b are parallel to each other; the first long side 21a and the second short side 22b are perpendicular to each other, and the second long side 22a and the first short side 21b are also perpendicular to each other.

[0025] Along the first direction, the first long side 21a and the second short side 22b are far apart from each other, and the second long side 22a and the first short side 21b are also far apart from each other; that is, the first long side 21a and the second short side 22b are not connected, and the second long side 22a and the first short side 21b are not connected. The Mylar sheet body 1 is continuous at one set of diagonals of the punching opening 2, without being punched. Specifically, along the first direction, the Mylar sheet body 1 between the first long side 21a and the second short side 22b is continuous and forms a first continuous portion, and the Mylar sheet body 1 between the second long side 22a and the first short side 21b is also continuous and forms a second continuous portion.

[0026] In this embodiment, by changing the shape of the punching opening 2, the integrity of the Mylar sheet is enhanced, which can prevent the first punching opening 21 and the second punching opening 22 of the Mylar sheet from being torn when the release paper of the Mylar sheet is torn off during production line operations; it can also prevent the punching opening 2 of the Mylar sheet from lifting up and hitting the hot melt preheating plate during production line operations, causing the Mylar sheet to melt; at the same time, it can improve the wrapping of the protrusion, preventing the Mylar sheet from lifting up and causing the protrusion of the keyboard backplate to directly contact the motherboard and cause a short circuit, affecting the product yield; using two L-shaped punching openings to make the punching opening 2 of the Mylar sheet can effectively solve the problem of the overall height difference of the punching opening, and avoid the phenomenon of uneven adhesion of the punching opening; in addition, compared with the existing annular punching opening and U-shaped punching opening, the punching head of the L-shaped first punching opening 21 and the second punching opening 22 moves in a straight line during processing, which makes the processing easier.

[0027] In some implementations, such as Figure 3 As shown, at least one of the junctions of the first long side 21a and the first short side 21b and the junctions of the second long side 22a and the second short side 22b is a rounded corner.

[0028] At least one of the first punching opening 21 and the second punching opening 22 has a rounded corner. The Mylar sheet body 1 may need to be provided with multiple punching openings 2 formed by the first punching opening 21 and the second punching opening 22. When two adjacent punching openings 2 are close to each other, the long side or the short side of one punching opening 2 may cut off the first continuous part or the second continuous part of the other punching opening 2, making the cut punching opening 2 easy to flip up and affecting its use.

[0029] In some implementations, such as Figure 3 As shown, the connection between the first long side 21a and the first short side 21b and the connection between the second long side 22a and the second short side 22b are both rounded.

[0030] To further prevent the long or short side of one of the punching breaks 2 from cutting off the first or second continuous part of another adjacent punching break 2, which would make the cut punching break 2 easily flip up and affect its use.

[0031] In some implementations, such as Figure 2 As shown, both the first spacing L1 and the second spacing L2 are greater than or equal to 1 mm.

[0032] If the first spacing L1 and the second spacing L2 are less than 1 mm, the strength of the punching break 2 will be insufficient or it will be easy to warp, affecting its use.

[0033] In some implementations, such as Figure 2 As shown, both the first spacing L1 and the second spacing L2 are greater than 2 mm.

[0034] When the first spacing L1 and the second spacing L2 are greater than 2 mm, the punching break 2 has greater strength and is less likely to warp.

[0035] In some implementations, such as Figure 2 As shown, along the first direction, the distance between the first end of the first long side 21a and the second end of the second short side 22b is L3, and L1 / L3≥1 / 8.

[0036] The first spacing L1 is equal to the second spacing L2, and L1 / L3 is greater than or equal to one-eighth, which can further ensure the strength of the punching break 2 and make it less likely to warp.

[0037] In some implementations, such as Figure 2 As shown, along the first direction, the distance between the first end of the first long side 21a and the second end of the second short side 22b is L3, where 2 / 7 ≤ L1 / L3 ≤ 4 / 5.

[0038] The first spacing L1 is equal to the second spacing L2. The ratio of L1 / L3 is in the range of 2 / 7 to 4 / 5, which can further ensure the strength of the punching break 2 and make it less likely to warp.

[0039] In some embodiments, the cross-sectional area of ​​the rectangle formed by the first punching opening 21 and the second punching opening 22 is 3 / 20 to 8 / 50 of the cross-sectional area of ​​the convex hull along the first direction.

[0040] The cross-section of the convex hull along the first direction is circular. This not only ensures the convex hull is contained, but also further prevents the Mylar film from warping.

[0041] In some embodiments, the lengths of the first short side 21b, the second short side 22b, the first long side 21a, and the first spacing L1, and the second long side 22a and the second spacing L2 are all equal.

[0042] The first punching opening 21 and the second punching opening 22 form a square.

[0043] In some embodiments, a laptop computer is also provided, including the Mylar sheet structure as described in the above embodiments.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A Mylar sheet structure, wherein the Mylar sheet structure is located between the convex bulge of the keyboard backplate and the PCB board, characterized in that, The Mylar sheet structure includes a Mylar sheet body, on which multiple punching openings are provided. The punching openings include a first punching opening and a second punching opening, both of which are L-shaped and together form a rectangle. The first punching opening includes a first long side and a first short side, and the second punching opening includes a second long side and a second short side. The first end of the first short side is connected to the first end of the first long side, and the first end of the second short side is connected to the first end of the second long side. The second end of the first short side is located on the extension line of the line containing the second long side, and the second end of the second short side is located on the line containing the first short side. The second end of the first short side is located on the line containing the second short side, and the second end of the second short side is located on the line containing the second short side. There is a first distance L1 between the second end of the first short side and the second end of the second long side along a first direction, and there is a second distance L2 between the second end of the second short side and the second end of the first long side along the first direction. The first distance and the second distance are equal, and the first direction is the extension direction of the lines containing the first long side and the second long side.

2. The Mylar sheet structure according to claim 1, characterized in that, At least one of the junctions of the first long side and the first short side and the junctions of the second long side and the second short side is a rounded corner.

3. The Mylar sheet structure according to claim 1 or 2, characterized in that, The junctions of the first long side and the first short side, as well as the junctions of the second long side and the second short side, are all rounded.

4. The Mylar sheet structure according to claim 1, characterized in that, Both the first spacing and the second spacing are greater than or equal to 1 mm.

5. The Mylar sheet structure according to claim 1 or 4, characterized in that, Both the first spacing and the second spacing are greater than 2 mm.

6. The Mylar sheet structure according to claim 1, characterized in that, Along the first direction, the distance between the first end of the first long side and the second end of the second short side is L3, where L1 / L3 ≥ 1 / 8.

7. The Mylar sheet structure according to claim 1, characterized in that, Along the first direction, the distance between the first end of the first long side and the second end of the second short side is L3, where 2 / 7 ≤ L1 / L3 ≤ 4 / 5.

8. The Mylar sheet structure according to claim 1, characterized in that, The area of ​​the rectangle formed by the first punching cut and the second punching cut is 3 / 20 to 8 / 50 of the cross-sectional area of ​​the convex hull along the first direction.

9. The Mylar sheet structure according to claim 1, characterized in that, The lengths of the first short side, the second short side, the sum of the length of the first long side and the first spacing, and the sum of the length of the second long side and the second spacing are all equal.

10. A laptop computer, characterized in that, Includes the Mylar sheet structure as described in any one of claims 1 to 9.

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