Lower plastic and cover plate assembly with same

Abstract

The utility model discloses a lower plastic cement and a cover plate assembly having the same, the lower plastic cement comprises a lower plastic cement body and an elastic connecting portion, the lower plastic cement body is provided with two post terminal through holes arranged at intervals, the two post terminal through holes are respectively arranged at two ends of the lower plastic cement body in the length direction, and the elastic connecting portion is arranged on the lower plastic cement body. A notch is formed in the edge of at least one end of the lower plastic body in the length direction; and the elastic connecting part is arranged at the notch and is connected with the two side edges of the notch in the width direction of the lower plastic body. According to the lower plastic cement provided by the embodiment of the utility model, the elastic connecting part is arranged, so that the deformation such as shrinkage, distortion and warping of the lower plastic cement can be automatically adjusted and compensated, the acting force of the lower plastic cement on the pole columns when the cover plate assembly is assembled can be reduced, and the deviation of the first pole column and the second pole column caused by the deformation of the lower plastic cement is avoided; deformation caused by the fact that the sealing ring compresses the lower plastic body near the post terminal after the cover plate is assembled can be absorbed, and the assembling problem of the lower plastic is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a lower plastic and a cover plate assembly having the same. Background Art

[0002] Relevant technologies point out that the lower plastic is very prone to shrinkage, warping, twisting and other deformations after injection molding. The lower plastic will be twisted and deformed due to thermal expansion and contraction. After the cover is assembled, the lower plastic will cause the pole to shift, which may cause poor sealing of the sealing ring in severe cases. After the cover is assembled, the sealing ring will compress the lower plastic near the pole and cause it to swell and deform due to force. The local size is different from other positions, which may affect the assembly of the pole group into the shell in severe cases. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a lower plastic that can automatically adjust and compensate for the deformation of the lower plastic, such as shrinkage, distortion, and warping.

[0004] The utility model also provides a cover plate assembly having the lower plastic.

[0005] According to the lower plastic of the embodiment of the first aspect of the utility model, the lower plastic includes: a lower plastic body, on which two pole through-holes arranged at intervals are formed, the two pole through-holes are respectively arranged at both ends of the lower plastic body in the length direction, and a notch is formed at the end edge of at least one end of the lower plastic body in the length direction; an elastic connecting part, the elastic connecting part is arranged at the notch position and is connected to the two side edges of the notch in the width direction of the lower plastic body.

[0006] According to the lower plastic of the embodiment of the utility model, by providing an elastic connection part, the shrinkage, twisting, warping and other deformations of the lower plastic can be automatically adjusted and compensated, and the force of the lower plastic on the pole during the assembly of the cover plate can be reduced, thereby avoiding the offset of the first pole and the second pole due to the deformation of the lower plastic. It can also absorb the deformation caused by the compression of the lower plastic near the pole by the sealing ring after the assembly of the cover plate, thereby avoiding assembly problems of the lower plastic.

[0007] According to some embodiments of the present invention, the pole through-hole has a first center line parallel to the length direction of the lower plastic body, and the notches are symmetrically arranged about the first center line.

[0008] According to some embodiments of the utility model, the elastic connecting portion includes: an elastic connecting rib, the elastic connecting rib extends along the width direction of the lower plastic, and the two ends of the elastic connecting rib are respectively connected to the two side edges of the notch in the width direction of the lower plastic body.

[0009] According to some embodiments of the present invention, the length of the elastic connecting rib is greater than the width of the notch.

[0010] According to some embodiments of the present invention, in the width direction of the lower plastic body, the elastic connecting rib extends along a curve and / or a fold line.

[0011] According to some embodiments of the utility model, in the width direction of the lower plastic body, the elastic connecting rib extends along a first arc line, and the first arc line is an arc line protruding from one side toward the other side in the thickness direction of the lower plastic, or the first arc line is an arc line protruding toward the opening side of the notch; or in the width direction of the lower plastic body, the elastic connecting rib extends along a first fold line, and the first fold line is a fold line protruding from one side toward the other side in the thickness direction of the lower plastic, or the first fold line is a fold line protruding toward the opening side of the notch.

[0012] According to some embodiments of the present invention, the number of the elastic connecting ribs is one or more. When the number of the elastic connecting ribs is plural, the plurality of elastic connecting ribs are arranged at intervals along the length direction of the lower plastic.

[0013] According to some embodiments of the present invention, in the width direction of the lower plastic, the ratio of the width of the notch to the width of the lower plastic is less than or equal to 0.5; and / or, in a projection plane perpendicular to the thickness direction of the lower plastic, the shape of the notch is U-shaped or V-shaped.

[0014] According to some embodiments of the present invention, the lower plastic body is provided with notches at both ends in the length direction, and the elastic connecting parts are provided at the two notches.

[0015] The cover plate assembly according to the second aspect of the present invention comprises the lower plastic according to the first aspect of the present invention.

[0016] According to the cover assembly of the embodiment of the utility model, by setting the lower plastic of the above-mentioned first aspect embodiment, the lower plastic can automatically adjust and compensate for its own deformation such as shrinkage, twisting, warping, etc., and can also reduce the force of the lower plastic on the pole when the cover is assembled, avoiding the offset of the first pole and the second pole due to the deformation of the lower plastic, thereby ensuring the sealing performance of the sealing ring, and can also absorb the deformation caused by the sealing ring compressing the lower plastic near the pole after the cover is assembled, thereby improving the assembly quality of the cover.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of a cover plate assembly according to some embodiments of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the lower plastic shown in ;

[0020] Figure 3 yes Figure 2 A top view of the lower plastic in FIG.

[0021] Figure 4 is along Figure 3 The cross-sectional view of line AA in the figure;

[0022] Figure 5 yes Figure 4 The enlarged view of the point B indicated by the middle circle;

[0023] Figure 6 is an exploded view of a cover plate assembly according to other embodiments of the utility model;

[0024] Figure 7 yes Figure 6 Schematic diagram of the lower plastic shown in ;

[0025] Figure 8 yes Figure 7 The enlarged view of the circled point C;

[0026] Fig. 9 is an exploded view of a cover plate assembly according to some other embodiments of the utility model;

[0027] Fig.10 yes Fig. 9 Schematic diagram of the lower plastic shown in ;

[0028] Fig.11 yes Fig.10 The enlarged view of the point D indicated by the middle circle;

[0029] Fig.12 yes Fig.10 The enlarged view of the circled E;

[0030] Fig.13 is along Fig.10 Sectional view along the GG line.

[0031] Reference numerals:

[0032] 10. Remove plastic;

[0033] 11. Lower plastic body; 12. Pole hole; 13. Exhaust hole; 14. Notch;

[0034] 20. elastic connecting part; 21. elastic connecting rib;

[0035] 30. Cover plate assembly;

[0036] 31. Pole;

[0037] 32. Top cover; 33. Upper plastic; 34. Riveting block; 35. Explosion-proof valve; 36. Sealing ring. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] Reference below Figure 1-Figure 13 The lower plastic 10 according to the first embodiment of the utility model is described.

[0040] like Figure 1 As shown, according to the lower plastic 10 of the first embodiment of the utility model, the lower plastic 10 includes: a lower plastic body 11 and an elastic connecting part 20 .

[0041] Specifically, two pole through-holes 12 arranged at intervals are formed on the lower plastic body 11, and the two pole through-holes 12 are respectively arranged at the two ends of the lower plastic body 11 in the length direction, and a notch 14 is formed at the end edge of at least one end of the lower plastic body 11 in the length direction; the elastic connecting part 20 is arranged at the position of the notch 14 and is connected to the two side edges of the notch 14 in the width direction of the lower plastic body 11.

[0042] The lower plastic 10 is an important component in the battery and plays an insulating role. Figure 1 As shown, the lower plastic body 11 extends in the left-right direction, and the lower plastic body has two pole through-holes 12 for the pole 31 to pass through, and the two pole through-holes 12 are respectively located at the left and right ends of the lower plastic body 11, and the lower plastic body 11 can have notches 14 at both ends, or the lower plastic body 11 can have a notch 14 only at the left end, or the lower plastic body 11 can have a notch 14 only at the right end, and the elastic connecting part 20 is located at the position where the notch 14 is located, and the two side edges of the elastic connecting part 20 in the front-to-back direction are connected to the two side edges of the notch 14 in the front-to-back direction, so that the elastic connecting part 20 can elastically adjust the area connected to the elastic connecting part 20.

[0043] In the prior art, the lower plastic 10 is very prone to deformation such as shrinkage, warping or twisting during injection molding. In this embodiment, the elastic connection part 20 is provided to compensate and offset the deformation of the lower plastic 10; in addition, the lower plastic 10 will be twisted and deformed due to thermal expansion and contraction. After the cover plate is assembled, the deformed lower plastic 10 will drive the pole to deviate, which will cause the sealing ring 36 to seal poorly in severe cases. In this embodiment, the elastic connection part 20 is provided to offset the deformation of the lower plastic 10, avoid the lower plastic body 11 from squeezing the pole 31, and avoid the phenomenon of the pole 31 being offset; the two pole through holes 12 are respectively located at both ends of the lower plastic body 11, and at least one end of the lower plastic body 11 has an elastic connection part 20. Since the distance between the elastic connection part 20 and the pole 31 is small, when the cover plate is assembled, the deformation caused by the sealing ring 36 compressing the lower plastic body 11 near the pole 31 can better compensate for the deformation of the lower plastic body 11 in the area near the pole 31, and avoid assembly problems of the lower plastic 10.

[0044] According to the lower plastic 10 of the embodiment of the utility model, by providing the elastic connecting part 20, the shrinkage, twisting, warping and other deformations of the lower plastic body 11 can be automatically adjusted and compensated, and the force of the lower plastic body 11 on the pole during the assembly of the cover plate can be reduced, thereby avoiding the displacement of the pole 31 due to the deformation of the lower plastic 10, and absorbing the deformation of the lower plastic body 11 near the pole caused by the compression of the sealing ring 36 after the assembly of the cover plate, thereby avoiding assembly problems of the lower plastic 10.

[0045] According to some embodiments of the present invention, the pole through hole 12 has a first center line L parallel to the length direction of the lower plastic body 11 , and the notches 14 are symmetrically arranged about the first center line L.

[0046] Reference Figure 2 As shown, the notch 14 is symmetrically distributed along the first center line L parallel to the length direction of the lower plastic body 11 along the pole through hole 12, and the elastic connecting part 20 is located at the position where the notch 14 is located, so that the elastic connecting part 20 can better adjust the deformation of the lower plastic body 11 area on the side of the pole through hole 12 toward the notch 14 caused by the sealing ring 36 squeezing along the first center line L. At the same time, the sealing ring 36 squeezes the lower plastic 10 body on the front side of the first center line L to cause deformation, which can be adjusted by the elastic connecting part 20 located on the front side of the first center line L. The sealing ring 36 squeezes the lower plastic 10 body on the rear side of the first center line L to cause deformation, which can be adjusted by the elastic connecting part 20 located on the rear side of the first center line L, which embodies the deformation adjustment effect of the elastic connecting part 20 on the lower plastic 10 body around the pole through hole 12.

[0047] According to some embodiments of the present invention, the elastic connection portion 20 includes an elastic connection rib 21, and the elastic connection rib 21 extends along the width direction of the lower plastic 10 (eg Figure 2 The two ends of the elastic connecting rib 21 are respectively connected to the two side edges of the notch 14 in the width direction of the lower plastic body 11 .

[0048] Reference Figure 3-Figure 4 - Figure 5 As shown, the elastic connecting rib 21 extends along the width direction of the lower plastic 10, one end of the elastic connecting rib 21 is connected to the front edge of the notch 14 in the front-to-back direction, and the other end of the elastic connecting rib 21 is connected to the rear edge of the notch 14 in the front-to-back direction. The elastic connecting rib 21 can be elastically deformed, so as to compensate for the deformation of the connecting areas at both ends of the elastic connecting rib 21. At the same time, the elastic connecting rib 21 is located on the lower plastic 10, and the elastic connecting rib 21 extends along the width direction of the lower plastic 10. It is integrally formed with the lower plastic 10 during the injection molding process of the lower plastic 10, which simplifies the structural complexity of the lower plastic 10 and improves production efficiency.

[0049] According to some embodiments of the utility model, the length of the elastic connecting rib 21 is greater than the width of the notch 14. That is, the elastic connecting rib 21 is in a curved shape. In this way, the elastic connecting rib 21 can absorb or adjust the stress of the lower plastic on both sides of the elastic connecting rib 21 by deforming itself, so as to adjust the deformation of the lower plastic such as twisting, bending and shrinkage, thereby expanding the elastic adjustment range of the elastic adjustment rib. In this way, the structure of the elastic connecting rib 21 can be simplified, which is conducive to the deformation of the elastic connecting rib 21.

[0050] According to some embodiments of the present invention, in the width direction of the lower plastic body 11 , the elastic connecting rib 21 extends along a curve and a fold line.

[0051] like Figure 4-Figure 5 - Figure 6 As shown, the elastic connecting rib 21 extends along the curve and the broken line in the left-right direction. The elastic connecting rib 21 has a regular shape, which can reduce the processing difficulty and improve the production efficiency.

[0052] According to some embodiments of the present invention, in the width direction of the lower plastic body 11 , the elastic connecting rib 21 extends along a curve.

[0053] Reference Figure 6 As shown, in the left-right direction, the elastic connecting ribs extend along a curve. By arranging the elastic connecting ribs 21 to extend along a curve in the left-right direction, the elastic connecting ribs 21 can be made regular in shape for easy processing.

[0054] According to some embodiments of the present invention, in the width direction of the lower plastic body 11 , the elastic connecting rib 21 extends along the fold line.

[0055] Specifically, in the left-right direction, the elastic connecting rib 21 extends along the fold line. By arranging the elastic connecting rib 21 to extend along the fold line in the left-right direction, the elastic connecting rib 21 can be made regular in shape for easy processing.

[0056] According to some embodiments of the present invention, in the width direction of the lower plastic body 11, the elastic connecting rib 21 extends along a first arc line, and the first arc line is an arc line that bulges from one side toward the other side in the thickness direction of the lower plastic 10, or the first arc line is an arc line that bulges toward the opening side of the notch 14.

[0057] Reference Figure 8 As shown, the elastic connecting rib 21 can extend in the direction of an arc convex from one side toward the other side in the thickness direction of the lower plastic 10, and the elastic connecting rib 21 can also extend in the direction of an arc convex from the lower plastic 10 toward the opening side of the notch 14. By setting the elastic connecting rib 21 to extend along the first arc direction, the elastic connecting rib 21 can be made regular in shape and easy to process.

[0058] According to some embodiments of the utility model, in the width direction of the lower plastic body 11, the elastic connecting rib 21 extends along the first fold line, and the first fold line is a fold line that protrudes toward the opening side of the notch 14. The first fold line can also be a fold line that protrudes from one side toward the other side in the thickness direction of the lower plastic 10.

[0059] Specifically, the elastic connecting rib 21 can extend in the direction of the fold line protruding from one side of the opening toward the notch 14, and the elastic connecting rib 21 can also extend in the direction of the fold line protruding from one side toward the other side in the thickness direction of the lower plastic 10. By setting the elastic connecting rib 21 to extend along the first fold line direction, the elastic connecting rib 21 can be made regular in shape and easy to process.

[0060] According to some embodiments of the present invention, the number of the elastic connecting ribs 21 is one or more. When the number of the elastic connecting ribs 21 is plural, the plurality of elastic connecting ribs 21 are arranged at intervals along the length direction of the lower plastic 10 .

[0061] Reference Fig. 9 As shown, the elastic connecting rib 21 can be one or more. A single elastic connecting rib 21 has a simple structure and is easier to process. Since there are gaps between the multiple elastic connecting ribs 21, multiple elastic connecting ribs 21 can save materials and reduce manufacturing costs. At the same time, since each elastic connecting rib 21 can function independently, multiple elastic connecting ribs 21 can be used to more flexibly compensate for the deformation of the surrounding parts. When there are multiple elastic connecting ribs 21, they are spaced apart along the length direction of the lower plastic 10 to avoid multiple elastic connecting ribs 21 from being tangled together and to avoid assembly problems.

[0062] According to some embodiments of the present invention, in the width direction of the lower plastic 10 , the ratio of the width of the notch 14 to the width of the lower plastic 10 is less than or equal to 0.5.

[0063] The width of the notch 14 is the distance between the front edge and the rear edge of the notch 14. The ratio of the width of the notch 14 to the width of the lower plastic 10 is less than or equal to 0.5. The larger the ratio is, the smaller the sum of the width of the lower plastic 10 at the front side of the notch 14 and the width of the lower plastic 10 at the rear side of the notch 14 will be. When the ratio of the width of the notch 14 to the width of the lower plastic 10 is too large, the strength of the lower plastic 10 will be insufficient. By adjusting the ratio of the width of the notch 14 to the width of the lower plastic 10, the strength of the lower plastic 10 can be guaranteed and the structure of the lower plastic 10 can be avoided from being damaged. At the same time, the elastic connecting part 20 is located at the position of the notch 14, and the elastic connecting part 20 can play an effective elastic adjustment role.

[0064] For example, the ratio of the width of the notch 14 to the width of the lower plastic may be 0.34, 0.38, 0.42, 0.46 or 0.5.

[0065] Preferably, the notch 14 and the pole through hole 12 are arranged at intervals.

[0066] According to some embodiments of the present invention, in a projection plane perpendicular to the thickness direction of the lower plastic 10 , the shape of the notch 14 is U-shaped or V-shaped.

[0067] Reference Figure 3-Figure 6 As shown, in the projection plane perpendicular to the thickness direction of the lower plastic 10 , the shape of the notch 14 can be a U-shaped notch 14 or a V-shaped notch 14 . The shape of the notch 14 is regular, which facilitates processing of the notch 14 and improves the production efficiency of the lower plastic 10 .

[0068] According to some embodiments of the present invention, in the width direction of the lower plastic 10 , the ratio of the width of the notch 14 to the width of the lower plastic 10 is less than or equal to 0.5, and in the projection plane perpendicular to the thickness direction of the lower plastic 10 , the shape of the notch 14 is U-shaped or V-shaped.

[0069] Reference Figure 3-Figure 6As shown, in the projection plane perpendicular to the thickness direction of the lower plastic 10, the shape of the notch 14 can be a U-shaped notch 14 or a V-shaped notch 14, the width of the notch 14 is the distance between the front edge and the rear edge of the notch 14, and the ratio of the width of the notch 14 to the width of the lower plastic 10 is less than or equal to 0.5. The larger the ratio, the smaller the sum of the width of the lower plastic 10 at the front side of the notch 14 and the width of the lower plastic 10 at the rear side of the notch 14 will be. When the ratio of the width of the notch 14 to the width of the lower plastic 10 is too large, the strength of the lower plastic 10 will be insufficient. By adjusting the ratio of the width of the notch 14 to the width of the lower plastic 10, the strength of the lower plastic 10 can be guaranteed to avoid the phenomenon of damage to the structure of the lower plastic 10. At the same time, the elastic connecting part 20 is located at the position of the notch 14, and the elastic connecting part 20 can play an effective elastic adjustment. At the same time, the shape of the notch 14 is regular, which is convenient for processing the notch 14.

[0070] For example, the ratio of the width of the notch 14 to the width of the lower plastic 10 may be 0.34, 0.38, 0.42, 0.46 or 0.5.

[0071] According to some embodiments of the present invention, notches 14 are formed at both ends of the lower plastic body 11 in the length direction, and elastic connecting parts 20 are disposed at the positions of the two notches 14 .

[0072] Reference Figure 2 As shown, the lower plastic 10 has two notches 14, and the two notches 14 are respectively located on the two side edges of the lower plastic 10 in the length direction, that is, one notch 14 is located on the left edge of the lower plastic 10 and the other notch 14 is located on the right edge of the lower plastic 10. Elastic connecting parts 20 are provided at the positions of the notches 14. The notch 14 located at the left end of the lower plastic 10 can elastically adjust the deformation of the left part of the lower plastic 10, and the notch 14 located at the right end of the lower plastic 10 can elastically adjust the deformation of the right part of the lower plastic 10, so that the deformation of the left part of the lower plastic 10 will not be transmitted to the right part or the deformation of the front part of the lower plastic 10 will not be transmitted to the rear part.

[0073] The cover assembly 30 according to the second embodiment of the utility model includes the lower plastic 10 according to the first embodiment of the utility model.

[0074] According to the cover assembly 30 of the embodiment of the utility model, by setting the lower plastic 10 of the above-mentioned first aspect embodiment, the lower plastic 10 can automatically adjust and compensate for its own deformation such as shrinkage, twisting, warping, etc., and can also reduce the force of the lower plastic 10 on the pole 31 during the assembly of the cover, thereby avoiding the displacement of the pole 31 due to the deformation of the lower plastic 10, thereby ensuring the sealing performance of the sealing ring 36, improving the assembly quality of the cover, and absorbing the deformation caused by the sealing ring 36 compressing the lower plastic body 11 near the pole 31 after the assembly of the cover assembly 30, thereby avoiding assembly problems of the lower plastic 10.

[0075] The cover plate assembly according to multiple embodiments of the present invention will be described below with reference to the accompanying drawings.

[0076] Embodiment 1,

[0077] like Figure 1 As shown, the cover assembly 30 includes: a lower plastic 10, a top cover 32, an upper plastic 33, a riveting block 34, a sealing ring 36 and a pole 31. The top cover 32 is arranged on the upper side of the lower plastic 10, and the upper plastic 33 is arranged on the upper side of the top cover 32. The pole 31 passes through the lower plastic 10, the sealing ring 36, the top cover 32 and the upper plastic 33 in sequence and is connected to the riveting block 34. The lower plastic body 11 of the lower plastic 10 is formed with an exhaust hole 13. The cover assembly 30 also includes an explosion-proof valve 35, which is arranged on the top cover 32 and covers the exhaust hole 13.

[0078] like Figure 2-Figure 5 As shown, the lower plastic 10 extends left and right and includes an elastic connecting portion 20 and a lower plastic body 11. The lower plastic body 11 extends left and right. The lower plastic body 11 has two notches 14. The left edge of the lower plastic 10 is formed with a first notch 14, and the shape of the first notch 14 is U-shaped. The right edge of the lower plastic 10 is formed with a second notch 14, and the shape of the second notch 14 is U-shaped.

[0079] The lower plastic body 11 has two pole through holes 12, and the center lines of the two pole through holes 12 are parallel to the length direction of the lower plastic body 11 (for example Figure 3 L line in the figure), the two notches 14 are symmetrically distributed along the center line L, the first pole through-hole 12 is located at the left end of the lower plastic body 11, the second pole through-hole 12 is located at the right end of the lower plastic body 11, the first pole through-hole 12 is located on the right side of the first notch 14, and the second pole through-hole 12 is located on the left side of the second notch 14.

[0080] Furthermore, elastic connecting parts 20 are provided at the locations of the two notches 14, and the elastic connecting parts 20 include multiple elastic connecting ribs 21. The multiple elastic connecting ribs 21 extend along the front-to-back direction and are arranged at intervals in the left-to-right direction. In the front-to-back direction, the elastic connecting ribs 21 form a downwardly concave V-shaped structure.

[0081] Embodiment 2, as Figure 7 and Figure 8 As shown, the structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked with the same reference numerals, and the only difference is that the two notches 14 described in the first embodiment are U-shaped, and the elastic connecting ribs 21 are V-shaped, while the two notches 14 described in the second embodiment are V-shaped, and the elastic connecting ribs 21 of the elastic connecting portions 20 at the positions of the two notches 14 extend along a first arc line, which is a circular arc line protruding toward the opening side of the notch 14 in the front-to-back direction.

[0082] Embodiment 3,

[0083] like Figure 10-12 As shown, the structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked with the same reference numerals, and the only difference is that: the elastic connecting rib 21 of the elastic connecting portion 20 described in the first embodiment is V-shaped, while in the second embodiment, the first notch 14 is located at the left edge of the lower plastic body 10, and the elastic connecting portion 20 at the position of the first notch 14 includes a plurality of elastic connecting ribs 21, and the plurality of elastic connecting ribs 21 are arranged at intervals along the left and right sides, and in the front-to-back direction, the elastic connecting rib 21 at the position of the first notch 14 extends along a circular arc line that is concave downward; the second notch 14 is located at the right edge of the lower plastic body 10, and the elastic connecting portion 20 at the position of the second notch 14 includes an elastic connecting rib 21, and in the front-to-back direction, the elastic connecting rib 21 at the position of the second notch 14 is in the shape of a circular arc plate that is concave downward.

[0084] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0085] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0086] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lower plastic, characterized in that: include: A lower plastic body, wherein two pole through-holes are formed on the lower plastic body and are arranged at intervals, and the two pole through-holes are respectively arranged at two ends of the lower plastic body in the length direction, and a notch is formed at the end edge of at least one end of the lower plastic body in the length direction; An elastic connecting portion is arranged at the position of the notch and is connected to two side edges of the notch in the width direction of the lower plastic body.

2. The lower plastic according to claim 1, characterized in that: The pole through hole has a first center line parallel to the length direction of the lower plastic body, and the notches are symmetrically arranged about the first center line.

3. The lower plastic according to claim 1, characterized in that: The elastic connection part includes an elastic connection rib extending along the width direction of the lower plastic, and two ends of the elastic connection rib are respectively connected to two side edges of the notch in the width direction of the lower plastic body.

4. The lower plastic according to claim 3, characterized in that: The length of the elastic connecting rib is greater than the width of the notch.

5. The lower plastic according to claim 4, characterized in that: In the width direction of the lower plastic body, the elastic connecting ribs extend along curves and / or fold lines.

6. The lower plastic according to claim 5, characterized in that: In the width direction of the lower plastic body, the elastic connecting rib extends along a first arc line, and the first arc line is an arc line that bulges from one side toward the other side in the thickness direction of the lower plastic, or the first arc line is an arc line that bulges toward the opening side of the notch; or In the width direction of the lower plastic body, the elastic connecting rib extends along a first fold line, and the first fold line is a fold line protruding from one side toward the other side in the thickness direction of the lower plastic, or the first fold line is a fold line protruding toward the opening side of the notch.

7. The lower plastic according to claim 5, characterized in that: The number of the elastic connecting ribs is one or more. When the number of the elastic connecting ribs is more than one, the multiple elastic connecting ribs are arranged at intervals along the length direction of the lower plastic.

8. The lower plastic according to claim 1, characterized in that: In the width direction of the lower plastic, the ratio of the width of the notch to the width of the lower plastic is less than or equal to 0.5; and / or, In a projection plane perpendicular to the thickness direction of the lower plastic, the shape of the notch is U-shaped or V-shaped.

9. The lower plastic according to claim 1, characterized in that: The lower plastic body is provided with notches at both ends in the length direction, and the elastic connecting parts are provided at the two notches.

10. A cover plate assembly, characterized in that: Comprising the lower plastic according to any one of claims 1-9.

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