Plastic bag castings

Abstract

A plastic-coated die-cast part includes a die-cast part and a plastic part; the die-cast part includes a first body; the first body includes a first base; the plastic part covers the die-cast part; the plastic part includes a second body, the second body including a second base located below the first base; the second base includes at least one engaging member embedded in the first base; at least one engaging member has a central hole and includes a first annular portion and a second annular portion; the second annular portion is located below the first annular portion, and the central hole passes through the first annular portion and the second annular portion; the radial dimension of the first annular portion is larger than the radial dimension of the second annular portion; the engaging member can firmly bond the plastic part and the die-cast part, thereby preventing the plastic part and the die-cast part from separating due to temperature changes.

Description

Technical Field

[0001] This disclosure relates to the field of display device technology, and more particularly to a plastic die-casting part. Background Technology

[0002] A display device combining a stretchable panel and a deformation mechanism is currently available, with its operating surface possessing deformation capabilities. To create an uneven surface (e.g., a surface with irregularities) on the operating surface, the stretchable panel can be connected to multiple independently controllable deformation mechanisms via adhesive layers. However, after repeated deformations, the stretchable panel is prone to peeling off at the edges of its connection points with the deformation mechanisms, affecting the deformation performance of the display device. In display devices, plastic-encapsulated die-cast parts are commonly used as backplates to support and protect the backlight assembly of the backlight module. Plastic-encapsulated die-cast parts combine plastic parts and a molding component using injection molding technology, so that the plastic part covers the outside of the die-cast part.

[0003] Die castings are generally made of alloy die castings. Therefore, plastic parts expand and contract more significantly with temperature changes than die castings. As a result, die castings and plastic parts are prone to separating due to temperature changes, and the corners of plastic parts often crack due to low temperatures. Summary of the Invention

[0004] One objective of this disclosure is to provide a plastic-coated die-cast part, wherein the base of the main body of the plastic part includes at least one engaging member, and the engaging member is embedded in the base of the main body of the die-cast part; since the engaging member includes a first annular portion and a second annular portion, with the first annular portion disposed on the second annular portion, and has a large radial dimension, the engaging member can firmly bond the plastic part and the die-cast part together, thereby preventing the plastic part and the die-cast part from separating longitudinally due to temperature changes.

[0005] Another object of this disclosure is to provide a plastic die-casting part, wherein the side wall of the body of the plastic part includes at least one hook, and the hook is embedded in the side wall of the body of the die-casting part. The hook allows the side wall of the body of the plastic part to be tightly joined with the side wall of the body of the die-casting part, effectively preventing the plastic part from separating from the die-casting part laterally.

[0006] Another objective of this disclosure is to provide a plastic-coated die-cast part, wherein the main body of the die-cast part has several notches corresponding to the corners of the plastic-coated die-cast part. This corner-free die-casting structure design avoids interference between the die-cast part and the shrinkage of the plastic part, thus preventing the plastic part from cracking at the corners of the plastic-coated die-cast part. Furthermore, the main body of the plastic part includes several corners corresponding to the corners of the plastic-coated die-cast part, and each corner includes two stops that abut against two exposed end faces formed by the notches. This suppresses the shrinkage of the plastic part and more effectively prevents corner cracking.

[0007] According to the above-mentioned objectives of this disclosure, a plastic-coated die-cast part is provided. This plastic-coated die-cast part includes a die-cast part and a plastic part. The die-cast part includes a first body. The first body includes a first base. The plastic part covers the die-cast part. The plastic part includes a second body, and the second body includes a second base located below the first base. The second base includes at least one engaging member embedded in the first base. The at least one engaging member has a central hole and includes a first annular portion and a second annular portion. The second annular portion is disposed below the first annular portion, and the central hole passes through the first annular portion and the second annular portion. The radial dimension of the first annular portion is larger than the radial dimension of the second annular portion.

[0008] According to one embodiment of the present disclosure, the distance between the outer side of the second annular portion and the central hole is equal to or less than 1 / 2 of the thickness of the second body, and the distance between the outer side of the first annular portion and the central hole is equal to or greater than the distance between the outer side of the second annular portion and the central hole plus 0.6 mm.

[0009] According to one embodiment of this disclosure, the first body further includes a first sidewall, and the second body further includes a second sidewall and at least one hook. The second sidewall covers the first sidewall. The at least one hook is embedded in the first sidewall and includes a first portion and a second portion. The first portion extends laterally from the inner surface of the second sidewall. The second portion extends downward from one end of the first portion and is embedded in the first sidewall.

[0010] According to one embodiment of the present disclosure, the thickness of the first part is equal to or less than 1 / 2 of the thickness of the second body, and the thickness of the second part is equal to or greater than the thickness of the first part plus 0.6 mm.

[0011] According to one embodiment of this disclosure, the aforementioned plastic die-cast part has several corners. A first body has several notches corresponding to the aforementioned corners. Each notch forms a first exposed end face and a second exposed end face in the first body. A second body includes several corner portions corresponding to the aforementioned corners. Each corner portion includes a first frame portion, a second frame portion, a first stop portion, and a second stop portion. The second frame portion engages with the first frame portion. The first stop portion is disposed on the first frame portion and abuts against the first exposed end face formed by the corresponding notch portion. The second stop portion is disposed on the second frame portion and abuts against the second exposed end face formed by the corresponding notch portion.

[0012] According to one embodiment of the present disclosure, there is a distance between the outer side of the first frame portion and the second stop portion, and between the outer side of the second frame portion and the first stop portion, which is equal to or greater than 10 mm.

[0013] According to one embodiment of the present disclosure, the thickness of the first frame portion and the second frame portion is 110% to 120% of the thickness of the second body.

[0014] According to one embodiment of the present disclosure, the first bottom member has at least one positioning hole penetrating through the first bottom member, and the second bottom member includes at least one positioning portion correspondingly embedded in the at least one positioning hole.

[0015] According to one embodiment of the present disclosure, the above-mentioned at least one positioning part is an annular structure and is embedded in a portion of the corresponding positioning hole.

[0016] According to one embodiment of the present disclosure, the number of the above-mentioned positioning holes is two, and these two positioning holes are respectively located at two opposite corners of the first bottom member. Attached Figure Description

[0017] A better understanding of the features disclosed herein can be obtained from the following detailed description taken in conjunction with the accompanying drawings. It should be noted that, according to industry standard practice, the features are not drawn to scale. In fact, the dimensions of the features can be arbitrarily increased or decreased for clarity of discussion.

[0018] Figure 1 A partial cross-sectional schematic diagram of a display device according to one embodiment of the present disclosure is shown.

[0019] Figure 2 Draw Figure 1 An enlarged schematic diagram of part A.

[0020] Figure 3 Draw Figure 1 An enlarged schematic diagram of part B.

[0021] Figure 4 A partial perspective view of a plastic-coated die-cast part according to one embodiment of the present disclosure is shown.

[0022] Figure 5 Draw Figure 1 A magnified diagram of part C.

[0023] Figure 6 A schematic diagram illustrating the position of the positioning holes in a die-cast part according to one embodiment of the present disclosure is shown.

[0024] Figure 7 A top view schematic diagram of a corner of a plastic die-cast part according to one embodiment of the present disclosure is shown.

[0025] In the attached figures, the following labels are used:

[0026] 100: Plastic-coated die-cast parts

[0027] 110: Corner

[0028] 200: Die casting

[0029] 210: First Subject

[0030] 212: First exposed end face

[0031] 214: Second exposed end face

[0032] 220: First bottom piece

[0033] 220a: Lower surface

[0034] 222: Engagement Hole

[0035] 222a: First hole

[0036] 222b: Second hole

[0037] 224: Positioning hole

[0038] 230: First sidewall

[0039] 240: Notch

[0040] 300: Plastic parts

[0041] 310: Second Subject

[0042] 320: Second bottom piece

[0043] 320a: Top surface

[0044] 322: Card assembly

[0045] 322a: First annular portion

[0046] 322a': Outer surface

[0047] 322b: Second annular portion

[0048] 322b': Outer side

[0049] 322c: Center hole

[0050] 324: Positioning Department

[0051] 330: Second sidewall

[0052] 330a: Inner surface

[0053] 340: Hook

[0054] 342: Part One

[0055] 344: Part Two

[0056] 350: Corner

[0057] 352: First border section

[0058] 352a: Outer surface

[0059] 354: Second border section

[0060] 354a: Outer surface

[0061] 356: First Gear

[0062] 358: Second Gear

[0063] A: Part

[0064] B: Part

[0065] C: Part

[0066] D1: Distance

[0067] D2: Distance

[0068] D3: Distance

[0069] T1: Thickness

[0070] T2: Thickness

[0071] t1: Thickness

[0072] t2: thickness Detailed Implementation

[0073] The embodiments of this disclosure are discussed in detail below. However, it will be understood that the embodiments provide many applicable concepts that can be implemented in a wide variety of specific situations. The embodiments discussed and disclosed are for illustrative purposes only and are not intended to limit the scope of this disclosure. All embodiments of this disclosure reveal a variety of different features, but these features can be implemented individually or in combination as needed.

[0074] In addition, the terms "first," "second," etc. used in this article do not specifically refer to order or sequence, but are only used to distinguish components or operations described using the same technical terms.

[0075] The spatial relationship between the two components described in this disclosure applies not only to the orientations shown in the diagrams, but also to orientations not shown in the diagrams, such as inverted orientations. Furthermore, the terms "connection," "electrical connection," or similar expressions used in this disclosure to refer to the two components are not limited to a direct or electrical connection, but may also include indirect or electrical connections as needed.

[0076] The terms “approximately” and “substantially” as used herein generally refer to within 20%, 10%, or 5% of a given value or range. These values ​​are merely examples and are not intended to be limiting. The terms “approximately” and “substantially” may refer to percentages of values ​​as interpreted by one skilled in the art in accordance with the teachings herein.

[0077] Please refer to Figure 1 and Figure 2The diagrams respectively illustrate partial cross-sectional views of a plastic-coated die-cast part 100 according to an embodiment of the present disclosure, and... Figure 1 A magnified schematic diagram of part A. The plastic-coated die-cast part 100 can be used as a backplate for a backlight module of a display device to mount the backlight assembly of the display device. The plastic-coated die-cast part 100 mainly includes a die-cast part 200 and a plastic part 300.

[0078] The die-cast part 200 can be formed by die casting of a metal alloy. The die-cast part 200 includes a first body 210. The first body 210 mainly includes a first base 220 and a first sidewall 230. The first base 220 is, for example, a plate-like structure, and the first sidewall 230 is erected on the outer periphery of the first base 220.

[0079] A plastic part 300 is wrapped around a die-cast part 200. For example, the plastic part 300 can be wrapped around the die-cast part 200 by injection molding technology, forming a plastic-encased die-cast part 100 with the die-cast part 200, which are of different materials. The plastic part 300 includes a second body 310. The second body 310 may mainly include a second bottom part 320 and a second sidewall 330. The second bottom part 320 may be, for example, a plate-like structure. The second bottom part 320 is located below the first bottom part 220, and the upper surface 320a of the second bottom part 320 may, for example, be attached to the lower surface 220a of the first bottom part 220.

[0080] like Figure 2 As shown, in some embodiments, the second base 320 includes at least one engaging member 322. The engaging member 322 protrudes upward from the upper surface 320a of the second base 320 and is embedded in the first base 220. Specifically, the first base 220 has at least one engaging hole 222 corresponding to the engaging member 322, and the engaging member 322 is located in the corresponding engaging hole 222. That is, the engaging holes 222 correspond to the engaging members 322 in number, position, shape, and size. In some exemplary embodiments, the second base 320 includes several engaging members 322. For example, each plastic die-cast part 100 may have 15 to 60 engaging members 322. These engaging members 322 may be arranged, for example, regularly on the upper surface 320a of the second base 320. The spacing between two adjacent engaging members 322 may be, for example, 40 mm.

[0081] Please continue to refer to Figure 2In some embodiments, each engaging member 322 includes a first annular portion 322a and a second annular portion 322b, and has a central hole 322c. The second annular portion 322b engages under the first annular portion 322a, and the central hole 322c passes through the first annular portion 322a and the second annular portion 322b, extending longitudinally through the engaging member 322. The central hole 322c may be located at the exact center of the engaging member 322. The radial dimension of the first annular portion 322a is larger than the radial dimension of the second annular portion 322b, such that the cross-sectional shape of the engaging member 322 is T-shaped. For example, the engaging member 322 may be a hollow cylindrical structure with a stepped structure.

[0082] Corresponding to the shape of the engaging member 322, the engaging hole 222 has a first hole 222a and a second hole 222b. The second hole 222b is located below the first hole 222a and communicates with the first hole 222a. The radial dimension of the first hole 222a is larger than the radial dimension of the second hole 222b. The first annular portion 322a is embedded in the first hole 222a, and the second annular portion 322b is embedded in the second hole 222b.

[0083] Please refer to Figure 1 and Figure 2 In some exemplary embodiments, the distance D1 between the outer surface 322b' of the second annular portion 322b of the engaging member 322 and the central hole 322c is equal to or less than half the thickness T1 of the second body 310. Furthermore, the distance D2 between the outer surface 322a' of the first annular portion 322a and the central hole 322c is equal to or greater than the distance D1 between the outer surface 322b' of the second annular portion 322b and the central hole 322c plus 0.6 mm. This dimensional design allows the engaging member 322 to be securely engaged in the first base member 220, preventing the second base member 320 from separating from the first base member 220.

[0084] Please refer to Figure 1 , Figure 3 ,and Figure 4 ,in Figure 3 Draw Figure 1 An enlarged schematic diagram of part B. Figure 4A partial perspective view of a die-cast plastic part 100 according to an embodiment of the present disclosure is shown. A second sidewall 330 of a second body 310 is erected on the outer periphery of a second base 320 and covers the first sidewall 230 of the first body 210. In some embodiments, the second body 310 further includes at least one hook 340. The hook 340 is embedded in the first sidewall 230 of the first body 210. Specifically, the hook 340 includes a first portion 342 and a second portion 344 that engage with each other. The first portion 342 extends laterally from the inner surface 330a of the second sidewall 330. The second portion 344 extends downward from one end of the first portion 342 and is embedded in the first sidewall 230. For example, the second portion 344 may be substantially perpendicular to the first portion 342.

[0085] In some exemplary embodiments, the thickness t1 of the first portion 342 is equal to or less than half the thickness T1 of the second body 310, and the thickness t2 of the second portion 344 is equal to or greater than the thickness t1 of the first portion 342 plus 0.6 mm. This dimensional design allows the hook 340 to securely engage with the first sidewall 230, while preventing the second sidewall 330 from separating from the first sidewall 230.

[0086] In some exemplary embodiments, the second body 310 includes a plurality of hooks 340. For example, each plastic die-cast part 100 may be provided with 16 to 50 hooks 340. These hooks 340 are spaced apart along the top of the first sidewall 230. Moreover, these hooks 340 may be arranged, for example, at equal intervals, with the interval between two adjacent hooks 340 being, for example, 40 mm.

[0087] Please refer to Figure 1 , Figure 5 ,and Figure 6 ,in Figure 5 Draw Figure 1 An enlarged schematic diagram of part C. Figure 6 A schematic diagram illustrating the position of a positioning hole 224 in a die-cast part 200 according to one embodiment of the present disclosure is shown. In some embodiments, a first base 220 has at least one positioning hole 224 penetrating the first base 220, and a second base 320 includes at least one positioning portion 324. The positioning portion 324 is correspondingly embedded in the positioning hole 224. That is, the positioning portions 324 correspond to the positioning holes 224 in number, position, outline, and radial dimension. Figure 6 As shown, in some exemplary embodiments, the first base 220 includes two positioning holes 224. For example, these two positioning holes 224 may be located at two opposite corners of the first base 220. The positioning holes 224 may be, for example, circular holes. The positioning holes 224 ensure the accuracy of the position of the die-cast part 200 when it is placed into the injection mold.

[0088] Each positioning part 324 has a ring-shaped structure, such as a circular ring structure. Figure 5 As shown, the positioning part 324 is embedded in a portion of the corresponding positioning hole 224. During the injection molding operation, plastic from the plastic part 300 is injected into a portion of each positioning hole 224, thereby forming the positioning part 324 that is engaged in the positioning hole 224. The corresponding engagement of the positioning part 324 with the positioning hole 224 increases the bonding force between the second base member 320 and the first base member 220.

[0089] Please refer to Figure 7 This is a top view schematic diagram illustrating a corner 110 of a plastic-coated die-cast part 100 according to an embodiment of the present disclosure. The plastic-coated die-cast part 100 has several corners 110. In embodiments where the plastic-coated die-cast part 100 has a square or rectangular structure, the plastic-coated die-cast part 100 has four corners 110. A first body 210 has several notches 240, wherein these notches 240 are located corresponding to the corners 110 of the plastic-coated die-cast part 100. These notches 240 are portions without die-casting structure. Each notch 240 forms a first exposed end face 212 and a second exposed end face 214 in the first body 210.

[0090] The second body 310 includes several corner portions 350, which correspond to the corners 110 of the die-cast plastic part 100. Therefore, these corner portions 350 respectively correspond to the notches 240 of the first body 210. Each corner portion 350 mainly includes a first frame portion 352, a second frame portion 354, a first stop portion 356, and a second stop portion 358. The first frame portion 352 and the second frame portion 354 are joined to form an L-shaped structure. The first stop portion 356 is provided on the first frame portion 352 and protrudes into the die-cast plastic part 100, abutting against the first exposed end face 212 formed by the corresponding notch 240. The second stop portion 358 is provided on the second frame portion 354 and protrudes into the die-cast plastic part 100, abutting against the second exposed end face 214 formed by the corresponding notch 240.

[0091] By designing the notch 240, the corner 110 of the plastic-coated die-cast part 100 is free of die-casting structure, thus preventing the die-cast part 200 from interfering with the shrinkage of the plastic part 300 in the corner 110 area and preventing shell cracking of the plastic part 300 at the corner 110 of the plastic-coated die-cast part 100. Furthermore, the first stop 356 and the second stop 358 of the corner portion 350 respectively abut against the first exposed end face 212 and the second exposed end face 214 formed by the corresponding notch 240. This suppresses the shrinkage of the plastic part 300 and more effectively prevents shell cracking of the plastic part 300 at the corner 110.

[0092] A distance D3 is provided between the outer side 352a of the first frame portion 352 and the second stop portion 358, and between the outer side 354a of the second frame portion 354 and the first stop portion 356. In some exemplary embodiments, the distance D3 is equal to or greater than 10 mm. This dimensional design can more effectively reduce the interference of the die-cast part 200 on the shrinkage of the plastic part 300 at the corner 110.

[0093] Since there is no die-cast structure at the corner 110 of the plastic die-cast part 100, the structural strength of the corner 110 is relatively weak. Therefore, the first edge portion 352 and the second edge portion 354 of the corner portion 350 of the plastic part 300 are thickened to strengthen the structural strength of the corner 110. In some exemplary embodiments, the thickness T2 of the first edge portion 352 and the second edge portion 354 is 110% to 120% of the thickness T1 of the second body 310.

[0094] Furthermore, during the injection molding process, by designing the distribution of plastic injection points, the corner 110 within 10mm of the die-cast plastic part 100 is free of joint lines formed by plastic injected from different injection points. This effectively prevents the plastic part 300 from cracking at the corner 110.

[0095] As can be seen from the above embodiments, the bottom part of the main body of the disclosed plastic part includes at least one engaging member, and the engaging member is embedded in the bottom part of the main body of the die-cast part. Since the engaging member includes a first annular portion and a second annular portion, with the first annular portion disposed on the second annular portion and having a large radial dimension, the engaging member can firmly bond the plastic part and the die-cast part together, thus preventing the plastic part and the die-cast part from separating longitudinally due to temperature changes.

[0096] Although this disclosure has been shown above by way of embodiments, it is not intended to limit this disclosure. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the appended claims.

Claims

1. A plastic-coated die-cast part, characterized in that, This plastic-coated die-cast part includes: A die-cast part, comprising a first body, wherein the first body includes a first base; and A plastic part is used to cover the die-cast part. The plastic part includes a second body and a second bottom part located below the first bottom part. The second bottom part includes at least one engaging member embedded in the first bottom part. The at least one engaging member has a central hole and includes a first annular portion and a second annular portion. The second annular portion is located below the first annular portion. The central hole passes through the first annular portion and the second annular portion. A radial dimension of the first annular portion is larger than a radial dimension of the second annular portion.

2. The plastic-coated die-cast part as described in claim 1, characterized in that, The distance between an outer side of the second annular portion and the central hole is equal to or less than 1 / 2 of the thickness of the second body, and the distance between an outer side of the first annular portion and the central hole is equal to or greater than the distance between the outer side of the second annular portion and the central hole plus 0.6 mm.

3. The plastic-coated die-cast part as described in claim 1, characterized in that: The first main body also includes a first sidewall; and The second body further includes a second sidewall and at least one hook, wherein the second sidewall covers the first sidewall, and the at least one hook is embedded in the first sidewall and includes: A first portion, extending laterally from an inner surface of the second sidewall; and A second part extends downward from one end of the first part and is embedded in the first sidewall.

4. The plastic-coated die-cast part as described in claim 3, characterized in that, The thickness of the first part is equal to or less than 1 / 2 of the thickness of the second body, and the thickness of the second part is equal to or greater than the thickness of the first part plus 0.6 mm.

5. The plastic-coated die-cast part as described in claim 1, characterized in that: This plastic-coated die-cast part has multiple corners; The first body has a plurality of notches, which are located at the plurality of corners, and each of the plurality of notches forms a first exposed end face and a second exposed end face in the first body; and The second body comprises a plurality of corner portions, each of which is located in a plurality of corners and includes: First border section; A second border portion, which is joined to the first border portion; A first stop portion is disposed on the first frame portion and abuts against the first exposed end face formed by a corresponding one of the plurality of notches; and A second stop is provided on the second frame portion and abuts against the second exposed end face formed by the corresponding one of the plurality of notches.

6. The plastic-coated die-cast part as described in claim 5, characterized in that, There is a distance between the outer side of the first frame portion and the second stop portion, and between the outer side of the second frame portion and the first stop portion, the distance being equal to or greater than 10mm.

7. The plastic-coated die-cast part as described in claim 5, characterized in that, The thickness of each of the first and second border portions is 110% to 120% of the thickness of the second body.

8. The plastic-coated die-cast part as described in claim 1, characterized in that, The first bottom member has at least one positioning hole penetrating through it, and the second bottom member includes at least one positioning portion correspondingly embedded in the at least one positioning hole.

9. The plastic-coated die-cast part as described in claim 8, characterized in that, The at least one positioning part is an annular structure and is embedded in a portion of the corresponding at least one positioning hole.

10. The plastic-coated die-cast part as described in claim 8, characterized in that, There are two positioning holes, and the two positioning holes are located at two opposite corners of the first bottom piece.

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