Antenna structure and communication equipment

Abstract

The utility model relates to the technical field of communication, in particular to an antenna structure and communication equipment. The antenna structure comprises a first part, a bending part and a second part which are sequentially connected along a first direction; the bending axis of the bending part is parallel to the second direction; the bending part is provided with a penetrating stress hole in the third direction, the stress hole extends along a preset extension line, the two ends of the preset extension line are spaced in the first direction, the preset extension line is perpendicular to the third direction, and the preset extension line comprises at least one of a curve and a broken line; wherein the first direction, the second direction and the third direction are perpendicular to one another in pairs. Through the mode, the internal stress of the bending part during bending can be reduced, the problem of warping of the antenna structure can be improved, the stress hole extends along the zigzag preset extension line, and when the length of the bending part along the first direction is too long, the bending part can deform along the second direction to shorten the length along the first direction, so that the antenna structure is more compact. And the problem that the bent part forms an arch and folds is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to an antenna structure and a communication device. BACKGROUND

[0002] NFC (Near Field Communication) is a non-contact identification and interconnection technology, which can realize near field wireless communication between mobile devices, consumer electronics, PCs and smart control tools.

[0003] Part of the NFC antenna has a bending part, in order to reduce the internal stress of the bending part and prevent warping, a stress hole is usually punched to narrow the width of the bending part. By narrowing the width of the bending part, the tensile strength of the bending part is reduced, and the antenna structure is easy to break under external pulling force.

[0004] In related technologies, in order to avoid the bending part from being pulled and broken, the length of the bending part is usually increased, but the bending part that is too long will form an arch or a wrinkle, which is not conducive to the miniaturization of the NFC antenna. CONTENT OF THE UTILITY MODEL

[0005] Embodiments of the present application aim to provide an antenna structure and a communication device, which can at least improve the problem that the bending part of the antenna structure forms an arch and a wrinkle.

[0006] In order to solve the above technical problems, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the embodiments of the present application provide an antenna structure, which comprises a first part, a bending part and a second part connected in sequence along a first direction; a bending axis of the bending part is parallel to a second direction; the bending part is provided with a stress hole penetrating along a third direction, the stress hole extends along a preset extension line, two ends of the preset extension line are spaced apart along the first direction, the preset extension line is perpendicular to the third direction, and the preset extension line comprises at least one of a curve and a fold line; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0008] In some embodiments, the preset extension line comprises at least two line segments, and any two adjacent line segments are arranged at an included angle.

[0009] In some embodiments, among any two adjacent line segments, the two line segments are mirror symmetric along the first direction.

[0010] In some embodiments, the preset extension line comprises a curve segment, and the curve segment connects two adjacent line segments.

[0011] In some embodiments, the curve segment is smoothly connected with the line segment.

[0012] In some embodiments, the curve segment is an arc.

[0013] In some embodiments, the number of line segments is odd, and the number of line segments is at least three.

[0014] In some embodiments, the number of stress holes is multiple, and the multiple stress holes are spaced apart along the second direction.

[0015] In some embodiments, notches are provided on both sides of the bent portion along the second direction, and the distances between any two notches and the stress holes are equal along the second direction.

[0016] Secondly, embodiments of this application provide a communication device, the communication device including the antenna structure as described in any of the preceding claims.

[0017] The antenna structure and communication device of this application embodiment reduce the internal stress during bending by providing a through stress hole in the bending portion, thereby improving the problem of antenna structure warping. The stress hole extends along a predetermined extension line of the bend. When the length of the bending portion along the first direction is too long, the bending portion can deform along the second direction to shorten the length along the first direction, thus improving the problem of arching and wrinkling of the bending portion.

[0018] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 This is a front view of the antenna structure in a flattened state according to an embodiment of this application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the antenna structure in a bent state;

[0022] Figure 3 yes Figure 1 Front view of the bent section of the antenna structure.

[0023] The reference numerals in the detailed embodiments are as follows:

[0024] 100. Antenna structure;

[0025] 1, first part; 11, first hole;

[0026] 2, bending part; 21, stress hole; 22, connecting arm; 221, sub-arm; 222, curved arm; 23, notch;

[0027] 3, second part; 31, second hole;

[0028] 4, preset extension line; 41, line segment; 42, curved segment;

[0029] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or there can be one or more intervening elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or there can be one or more intervening elements therebetween.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the terms "include" and "have" and any variations thereof used in the specification and claims of this application and the above description of the drawings are intended to cover the inclusion not the exclusion of one or more elements.

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0033] In the description of the embodiments of the present application, the terms "first", "second", etc. are used to limit parts, only for the convenience of distinguishing the corresponding parts, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly limited.

[0034] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not used to limit the present application. The term "and / or" used in the present application includes any and all combinations of one or more related listed items.

[0035] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0036] In a first aspect, referring to Figure 1 and Figure 2 The present application provides an antenna structure 100, which comprises a first part 1, a bending part 2 and a second part 3 connected in sequence along a first direction X; the bending axis of the bending part 2 is parallel to a second direction Y; the bending part 2 is provided with a stress hole 21 penetrating along a third direction Z.

[0037] For the convenience of description, referring to Figure 1 The present application describes the antenna structure 100 in a flat state, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other, the first direction X and the second direction Y are parallel to the antenna structure 100, and the third direction Z is perpendicular to the antenna structure 100.

[0038] It should be noted that the antenna structure 100 comprises a circuit coil and a ferrite layer. The circuit coil is the core part of the antenna structure 100, which is used to generate and receive electromagnetic field signals. According to different application requirements, the circuit coil can adopt different winding methods (such as single-layer winding, multi-layer winding, etc.) and shapes (such as circular, square, rectangular, etc.). In addition, the number of turns, the width of the wire, the width of the gap, etc. of the circuit coil will also affect its electrical parameters (such as inductance, resistance, self-resonant frequency, etc.), and thus affect the performance of the antenna structure 100, so the number of turns, the width of the wire, the width of the gap of the circuit coil also need to be designed according to the requirements. The ferrite layer is usually attached to one side of the circuit coil, which is used to absorb and shield external electromagnetic interference signals, and enhance the anti-interference ability of the antenna structure 100.

[0039] In some embodiments, the circuit coil is formed in a FPC (Flexible Printed Circuit Board), i.e. the antenna structure 100 comprises a FPC, and the printed circuit in the FPC is the circuit coil for generating and receiving electromagnetic field signals. The FPC is a printed circuit board made of a flexible insulating substrate (mainly polyimide or polyester film), which can be freely bent, wound, folded, and can greatly reduce the volume of electronic products, and is suitable for the needs of the development of electronic products in the direction of high density, miniaturization and high reliability.

[0040] In some embodiments, the ferrite layer is a ferromagnetic metal oxide. The ferrite layer can be coated or pasted on the FPC.

[0041] It can be understood that the antenna structure 100 is flat to facilitate bending, and the ferrite layer is located on one side of the circuit coil in the thickness direction. The FPC is the substrate of the antenna structure 100, and the first part 1, the bending part 2 and the second part 3 all comprise the FPC. The first part 1 and the second part 3 are both used to be fixedly installed on an external device, for example, as shown in the figure, the first part 1 is fixedly installed on the back of a mobile phone, and the second part 3 is fixedly installed on the front of the mobile phone. Figure 1 As shown in the figure, the first part 1 is provided with a first hole 11, and the second part 3 is provided with a second hole 31, the first hole 11 is used to position the first part 1 on the external device and be installed on the external device, and the second hole 31 is used to position the second part 3 on the external device and be installed on the external device.

[0042] Since the FPC has elasticity, when the bending part 2 is bent, the bending part 2 will recover part of the deformation, causing the bending part 2 to form an arch and wrinkles, which is not conducive to the close fit of the antenna structure 100 and the installed external device. By providing a stress hole 21 through the bending part 2, the internal stress of the bending part 2 when it is bent can be reduced, and the warping problem of the antenna structure 100 can be improved.

[0043] However, the provision of the stress hole 21 in the bending part 2 reduces the tensile strength of the bending part 2, and due to the cumulative effect of the assembly offset accuracy and positioning dimensional tolerance of the first part 1 and the second part 3, the length of the bending part 2 may be less than the required length, so that the bending part 2 is continuously subjected to tensile load, which is easy to cause the bending part 2 to break and fail. In order to avoid the tensile breakage of the bending part 2, the length of the bending part 2 is usually increased, so that the above-mentioned breakage problem of the bending part 2 is not easy to occur, but the overlong bending part 2 will form an arch or wrinkles, causing the antenna structure 100 to be unable to closely fit the installed external device, which is not conducive to the miniaturization of the antenna structure 100.

[0044] In order to improve the above-mentioned problems, please refer to Figure 3, the stress hole 21 extends along a preset extension line 4, the preset extension line 4 is spaced apart along the first direction X at two ends, the preset extension line 4 is perpendicular to the third direction Z, and the preset extension line 4 includes at least one of a curve and a broken line. Since the stress hole 21 extends along the curved preset extension line 4, when the bending portion 2 is too long along the first direction X, the bending portion 2 deforms along the second direction Y when subjected to a force that shortens the length of the bending portion 2, thereby improving the problem that the bending portion 2 forms an arch and wrinkles when deforming along the thickness direction.

[0045] For example, referring to FIG. 3, the stress hole 21 divides the bending portion 2 into at least two connecting arms 22 along the second direction Y. Since the connecting arms 22 extend along the first direction X and are curved when viewed along the third direction Z, when the bending portion 2 is subjected to a force that shortens the length of the bending portion 2, the connecting arms 22 deform along the second direction Y, for example, fold or bend, so that the bending portion 2 deforms along the second direction Y and is less likely to deform along the thickness direction. It can be understood that the width of the connecting arms 22 along the second direction Y at any two positions is equal, and the connecting arms 22 are curved, thereby facilitating bending and folding of the connecting arms 22 along the second direction Y.

[0046] In some embodiments, referring to FIG. 3, the preset extension line 4 includes at least two line segments 41, and any two adjacent line segments 41 are arranged at an angle. Then the connecting arms 22 include two sub-arms 221 arranged at an angle with each other, and when the bending portion 2 is subjected to a force that shortens the length of the bending portion 2, the two sub-arms 221 fold with each other, and the folding axis is parallel to the third direction Z, so that the connecting arms 22 deform along the second direction Y.

[0047] In some embodiments, referring to FIG. 3, in any two adjacent line segments 41, the two line segments 41 are mirror-symmetrical along the first direction X. Then the two sub-arms 221 corresponding to the two line segments 41 are also mirror-symmetrical along the first direction X and have equal lengths. When the bending portion 2 is subjected to a force that shortens the length of the bending portion 2, if the two sub-arms 221 have unequal lengths or are not mirror-symmetrical along the first direction X, the two sub-arms 221 fold with each other asymmetrically, which will cause a force along the second direction Y between the two sub-arms 221, and a shear force along the second direction Y between the sub-arms 221 and the first portion 1 or the second portion 3, thereby shortening the service life of the antenna structure 100. In the present embodiment, the two sub-arms 221 are mirror-symmetrical along the first direction X, and when the bending portion 2 is subjected to a force that shortens the length of the bending portion 2, the two sub-arms 221 fold with each other symmetrically, thereby improving the problem of the shear force along the second direction Y between the two sub-arms 221 and between the sub-arms 221 and the first portion 1 or the second portion 3, and delaying the service life of the antenna structure 100.

[0048] In some embodiments, referring to 3, the preset extension line 4 comprises a curved segment 42 connecting two adjacent line segments 41. When the two line segments 41 are directly connected, the connection between the two line segments 41 has an angle, so that the connection arm 22 has a notch, which is prone to tearing at the notch. By connecting the two line segments 41 through the curved segment 42, the problem of the connection arm 22 being prone to tearing can be improved.

[0049] It can be understood that the connection arm 22 has a curved arm 222 corresponding to the curved segment 42, which connects two adjacent sub-arms 221.

[0050] In some embodiments, referring to 3, the curved segment 42 is smoothly connected with the line segment 41. The smooth connection means that the tangent line of the curved segment 42 at the connection between the curved segment 42 and the line segment 41 is parallel to the line segment 41, so that the connection between the curved segment 42 and the line segment 41 also does not have an angle, further improving the problem of the connection arm 22 having a notch being prone to tearing.

[0051] In some embodiments, referring to 3, the curved segment 42 is an arc. When the two line segments 41 connected thereto are mirror-symmetrical along the first direction X, the curved segment 42 itself is mirror-symmetrical along the first direction X, so that the curved arm 222 corresponding to the curved segment 42 is mirror-symmetrical along the first direction X. When the bending part 2 is subjected to a force that shortens its length, if the curved arm 222 is not mirror-symmetrical along the first direction X, the two ends of the curved arm 222 are not mirror-symmetrical and bend towards each other, which will cause a force along the second direction Y between the curved arm 222 and the adjacent sub-arm 221, and cause a shear force along the second direction Y between the curved arm 222 and the sub-arm 221 and between the sub-arm 221 and the first part 1 or the second part 3, which will shorten the service life of the antenna structure 100. In the present embodiment, the curved arm 222 is mirror-symmetrical along the first direction X, and when the bending part 2 is subjected to a force that shortens its length, the two ends of the curved arm 222 are mirror-symmetrical and bend towards each other, which improves the problem of the shear force along the second direction Y between the curved arm 222 and the sub-arm 221 and between the sub-arm 221 and the first part 1 or the second part 3, and prolongs the service life of the antenna structure 100.

[0052] In some embodiments, referring to FIG. 3, the number of the line segments 41 is odd, and the number of the line segments 41 is at least three. When the number of the line segments 41 is even, for example, two, the connecting arm 22 only deforms along one direction parallel to the second direction Y, resulting in that the connecting arm 22 deforms too much along one direction parallel to the second direction Y. When the connecting arm 22 deforms too much along the second direction Y, the connecting arm 22 can deform to abut against other electronic devices or the shell in the external device, resulting in that the connecting arm 22 cannot deform further, weakening the effect of improving the problem of the bending portion 2 forming an arch and a wrinkle. By making the number of the line segments 41 odd and at least three, the connecting arm 22 deforms along two directions parallel to the second direction Y, which is beneficial to improving the problem of the connecting arm 22 deforming too much along one direction parallel to the second direction Y. Moreover, when the number of the line segments 41 is large, the length of the line segments 41 is shortened, which is beneficial to improving the problem of the connecting arm 22 deforming too much along the second direction Y. Optionally, the number of the line segments 41 is three.

[0053] In some embodiments, referring to FIG. 3, the number of the stress holes 21 is multiple, and the multiple stress holes 21 are arranged at intervals along the second direction Y. By arranging multiple stress holes 21, multiple connecting arms 22 are formed, and the width of a single connecting arm 22 along the second direction Y is shortened, so that the connecting arm 22 is more prone to bending or folding along the second direction Y. Optionally, the number of the stress holes 21 is three.

[0054] In some embodiments, referring to FIG. 3, the bending portion 2 is provided with notches 23 on opposite sides along the second direction Y, and the distance between any two of the notches 23 and the stress holes 21 along the second direction Y is equal. By making the distance between the notches 23 and the stress holes 21 constant, the width of the connecting arm 22 between any two of the notches 23 and the stress holes 21 along the second direction Y is equal, i.e., constant, so that the connecting arm 22 has the same meandering shape as the connecting arm 22 between two stress holes 21, which is beneficial to bending and folding along the second direction Y. It can be understood that the shape and size of the notches 23 are the same as those of the part of the stress holes 21. Optionally, the width of the connecting arm 22 between the notches 23 and the stress holes 21 along the second direction Y is greater than the width of the connecting arm 22 between two stress holes 21 along the second direction Y, so that the connecting arm 22 between the notches 23 and the stress holes 21 has higher strength.

[0055] In some embodiments, referring to FIG. 3, the two ends of the stress hole 21 along the first direction X are semicircular.

[0056] In a second aspect, the embodiments of the present application provide a communication device (not shown) comprising the antenna structure 100. The communication device has the structural features and advantages of the antenna structure 100, which are not repeated here. The communication device can be a mobile phone, a wireless earphone, a wireless power bank, a notebook computer, a router, etc.

[0057] The antenna structure 100 and the communication device of the embodiments of the present application reduce the internal stress when the bending part 2 is bent, improve the warping problem of the antenna structure 100, by providing the stress hole 21 penetrating through the bending part 2. The stress hole 21 extends along the preset extension line 4 of the bending part 2. When the length of the bending part 2 along the first direction X is too long, the bending part 2 can deform along the second direction Y to shorten the length along the first direction X, and improve the problem of the bending part 2 forming an arch and wrinkles.

[0058] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for simplicity; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna structure, characterized by The first part, the bending part and the second part are sequentially connected along a first direction; The bending axis of the bending part is parallel to a second direction; The bending part is provided with a stress hole penetrating along a third direction, the stress hole extends along a preset extension line, two ends of the preset extension line are spaced along the first direction, the preset extension line is perpendicular to the third direction, and the preset extension line comprises at least one of a curve and a fold line; The first direction, the second direction and the third direction are perpendicular to each other in pairs.

2. The antenna structure according to claim 1, wherein The preset extension line comprises at least two line segments, and any two adjacent line segments are arranged at an included angle.

3. The antenna structure according to claim 2, wherein In any two adjacent line segments, the two line segments are mirror symmetric along the first direction.

4. The antenna structure according to claim 2, wherein The preset extension line comprises a curve segment, and the curve segment connects adjacent two line segments.

5. The antenna structure according to claim 4, wherein The curve segment is smoothly connected with the line segment.

6. The antenna structure according to claim 5, wherein The curve segment is an arc line.

7. The antenna structure according to claim 2, wherein The number of the line segments is odd, and the number of the line segments is at least three.

8. The antenna structure according to any one of claims 1 to 7, wherein The number of the stress holes is multiple, and the multiple stress holes are spaced along the second direction.

9. The antenna structure according to any one of claims 1 to 7, wherein The bending part is provided with a notch on opposite sides along the second direction, and the distance between any two places of the notch and the stress hole along the second direction is equal.

10. A communication device, characterized by An antenna structure according to any one of claims 1 to 9.

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