CN110958761A - Flexible circuit board and terminal equipment - Google Patents

Abstract

The utility model provides a flexible circuit board, terminal equipment relates to terminal technical field. Wherein, flexible circuit board includes: a first face, a second face, and a side face; the first surface and the second surface are oppositely arranged, and the side surface is connected with the first surface and the second surface; a first cutting groove is formed in the side face, and the depth of the first cutting groove is smaller than the width of the flexible circuit board. The flexible printed circuit board can be fixed on the mounting area which is not flat enough. Through setting up the first cut groove on the side of flexible circuit board, optimize the bending property of flexible circuit board for flexible circuit board is changeed and is produced the crooked deformation of side, with the crooked installation region of laminating. In such a case, the requirements of the flexible circuit board on the spatial size and flatness of the mounting area are reduced. And then reduced the restriction when carrying out the inner space to the terminal equipment that adopts this flexible circuit board, reduced the design of terminal equipment, the equipment degree of difficulty.

Description

Flexible circuit board and terminal equipment

Technical Field

The present disclosure relates to the technical field of terminal devices, and in particular, to a flexible circuit board and a terminal device.

Background

The circuit board is an important component in the terminal equipment, and the integrated arrangement of various components is realized through the circuit board so as to meet the design requirements of small size and portability of the terminal equipment.

In the related art, a printed circuit board having a hard substrate is often used as a terminal device. When the circuit board is used, the circuit board needs to be arranged in an area with enough space and good flatness so as to ensure the assembly stability and the normal use of the terminal equipment.

The circuit board in the terminal provided by the related art has high requirements for the installation area, has many limitations on the planning of the internal space of the terminal equipment, and increases the design and assembly difficulty of the terminal equipment.

Disclosure of Invention

The present disclosure provides a flexible circuit board and a terminal device to solve the deficiencies in the related art.

A first aspect of the present disclosure provides a flexible circuit board, including: a first face, a second face, and a side face;

the first side and the second side are oppositely arranged, and the first side and/or the second side are used for arranging electronic devices;

the side surface connects the first surface and the second surface;

and a first cutting groove is arranged on the side surface, and the depth of the first cutting groove is smaller than the width of the flexible circuit board.

Optionally, at least two first cutting grooves are arranged on the side surface;

the at least two first cutting grooves are arranged along the thickness direction of the flexible circuit board and are distributed in an arrangement mode along the length direction or the width direction of the flexible circuit board.

Alternatively, the first cut groove is provided on both of the side surfaces that are oppositely disposed.

Optionally, the first cutting slot includes an arc-shaped inner wall, and the inner wall extends to the first face and/or the second face and forms an arc-shaped opening on the first face and/or the second face.

Optionally, an electronic device is disposed on the first surface and/or the second surface, and a depth of the first cut groove is smaller than a distance from a side surface where the first cut groove is located to the electronic device.

Optionally, a second cut groove is provided on the first face and/or the second face.

Optionally, at least two second cutting grooves are arranged on the first surface and/or the second surface;

at least two second cutting grooves are arranged along a first direction and are distributed in a arrayed manner along a second direction, and an included angle is formed between the first direction and the second direction.

Optionally, the second cut groove is disposed around a preset area.

Optionally, a through hole is provided on the flexible circuit board, the through hole forming the preset region.

A second aspect of the present disclosure provides a terminal device including the flexible circuit board provided in the first aspect.

Optionally, the terminal further comprises a housing forming a module, the housing forming an accommodating cavity with one open end;

the module shell is connected with the flexible circuit board, and the circuit board blocks the accommodating cavity;

the flexible circuit board is provided with a second cut groove, and the second cut groove is arranged on the part, corresponding to the accommodating cavity, of the first face and/or the second face.

Optionally, the second cut-out is arranged parallel to the inner wall of the receiving cavity.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the flexible printed circuit board can be used to fix mounting areas that are not flat enough, for example, mounting areas with projections or recesses. And, through setting up the first cut groove on the side of flexible circuit board, improve the tension of flexible circuit board side, optimize the bending property of flexible circuit board. In this case, the flexible circuit board is more likely to be subjected to side bending deformation, so that the side of the flexible circuit board can be fitted to the bent mounting region. Therefore, the flexible circuit board can be fixed in the mounting area after being bent, and the requirements on the space size and the flatness of the mounting area are reduced. And then reduced the restriction when carrying out the inner space to the terminal equipment that adopts this flexible circuit board, reduced the design of terminal equipment, the equipment degree of difficulty.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram of a flexible circuit board shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram of a flexible circuit board shown in accordance with another exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a partial structure of a flexible circuit board according to an exemplary embodiment;

FIG. 4 is a schematic diagram of a flexible circuit board shown in accordance with another exemplary embodiment;

FIG. 5 is a schematic diagram of a flexible circuit board shown in accordance with another exemplary embodiment;

FIG. 6 is a schematic diagram of a flexible circuit board shown in accordance with another exemplary embodiment;

FIG. 7 is a schematic diagram of a flexible circuit board shown in accordance with another exemplary embodiment;

FIG. 8 is a schematic diagram of a flexible circuit board shown in accordance with another exemplary embodiment;

fig. 9 is a schematic structural view of a flexible circuit board and a module housing in a terminal according to an exemplary embodiment.

The reference numerals in the drawings mean:

1. a first side;

2. a second face;

3. a side surface;

41. a first cutting groove;

411. an inner wall;

412. an opening;

42. a second cutting groove;

5. a module housing;

51. a receiving cavity.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic diagram of a flexible circuit board shown in accordance with an example embodiment. As shown in fig. 1, an embodiment of the present disclosure provides a flexible circuit board including: a first face 1, a second face 2, and a side face 3. Wherein the first side 1 and the second side 2 are oppositely arranged, and the first side 1 and/or the second side 2 are used for arranging electronic devices. The side surface 3 is connected with the first surface 1 and the second surface 2, a first cutting groove 41 is arranged on the side surface 3, and the depth of the first cutting groove 41 is smaller than the width of the flexible circuit board. It will be appreciated that the first side 1 and/or the second side 2 are part of a flexible circuit board provided with wiring, integrated chips, etc. of an electronic device.

The flexible circuit board may be secured to mounting areas that are not flat enough, such as mounting areas having bumps or depressions. And, through setting up the first cut groove 41 on the side 3 of the flexible circuit board, improved the side 3 tension of flexible circuit board, optimize the bending property of flexible circuit board. In this case, the flexible circuit board is more susceptible to lateral bending deformation, so that the side 3 of the flexible circuit board can conform to the curved mounting area. Therefore, the flexible circuit board can be fixed in the mounting area after being bent, and the requirements on the space size and the flatness of the mounting area are reduced. In addition, the depth of the first cut groove 41 is smaller than the width of the flexible circuit board, that is, the first cut groove 41 does not penetrate through the flexible circuit board, so that the problem that the flexible circuit board is broken due to the fact that the first cut groove 41 is too deep, and normal use of the flexible circuit board is affected is avoided.

The flexible circuit board provided by the embodiment of the disclosure has low requirements for the installation area, so that the limitation on the internal space of the terminal equipment adopting the flexible circuit board is reduced, and the design and assembly difficulty of the terminal equipment is reduced.

Regarding the distribution manner of the first cutting grooves 41, in one embodiment, as shown in fig. 1, at least two first cutting grooves 41 are provided on the side surface 3, and the at least two first cutting grooves 41 are arranged along the thickness direction of the flexible circuit board and are distributed along the length and/or width direction of the flexible circuit board.

The first cut groove 41 is arranged along the thickness direction of the flexible circuit board, so that when the flexible circuit board is bent, the first cut groove 41 on the side surface 3 can be opened as much as possible, which is beneficial to increasing the bending degree of the flexible circuit board so as to adapt to different mounting conditions. In addition, the plurality of first cutting grooves 41 which are distributed in a arrayed manner along the length direction of the flexible circuit board can disperse internal stress of the flexible circuit board during bending, so that the flexible circuit board is prevented from being torn due to stress concentration at one point, and the bending performance of the flexible circuit board is optimized on the premise of ensuring the safety of equipment.

Fig. 2 is a schematic structural diagram of a flexible circuit board according to another exemplary embodiment. In this embodiment, as further shown in fig. 2, first notches 41 are provided on the two oppositely disposed side surfaces 3. The tension of the two side surfaces 3 can be respectively improved by arranging the first cutting grooves 41 on the two oppositely arranged side surfaces 3, when the flexible circuit board bends towards one side, the first cutting groove 41 on one side surface 3 is pressed to contract, and the first cutting groove 41 on the opposite side surface 3 is stretched and opened, so that the flexible circuit board is in a stable bending state.

And, can increase the elasticity of flexible circuit board through setting up the first cut groove 41 on two relative sides 3 for flexible circuit board is changeed and is produced tensile or compression deformation, further improves the adaptability to different size installation controlling parts.

In this embodiment, the first cut grooves 41 may be alternatively provided on the opposite side surfaces 3. The first cutting grooves 41 arranged in a staggered mode can prevent the flexible circuit board from being subjected to size reduction, so that mechanical weak parts are avoided, and structural stability is guaranteed.

Fig. 3 is a partial structural schematic diagram of a flexible circuit board shown according to an exemplary embodiment. Regarding the alternative configuration of the first cut groove 41, in one embodiment, as shown in fig. 3, the first cut groove 41 communicates with the first face 1 and/or the second face 2. Wherein, when first grooving 41 intercommunication first face 1 and second face 2, first grooving 41 runs through the flexible circuit board in thickness direction, and the part that side 3 is close to first face 1 and second face 2 this moment all can realize great degree bending deformation. In this case, the first cut groove 41 includes an arc-shaped inner wall 411, and the inner wall 411 extends to the first face 1 and/or the second face 2, and forms an arc-shaped opening 412 on the first face 1 and/or the second face 2. The arc-shaped inner wall 411 helps to uniformly distribute the stress at the first cut groove 41, and avoids tearing of the flexible circuit board caused by stress concentration. Similarly, the arc-shaped opening 412 formed on the first surface 1 and/or the second surface 2 by the arc-shaped inner wall 411 also prevents the flexible circuit board from being torn from the opening 412 when being bent or stretched, and ensures the safety of the equipment.

In one embodiment, the electronic device is disposed on the first surface 1 and/or the second surface 2, and the depth of the first cut groove 41 is smaller than the distance from the side surface 3 where the first cut groove 41 is located to the electronic device. Wherein the optional electronic devices are wires, pads, chips, etc. In such a case, the electronic device is prevented from crossing the first cut groove 41, which affects the connection stability of the electronic device to the first face 1 and/or the second face 2.

Fig. 4 to 8 are schematic structural views of flexible circuit boards respectively shown according to different exemplary embodiments. In one embodiment, as shown in fig. 4, a second cut groove 42 is provided on the first face 1 and/or the second face 2. The surface tension of the first surface 1 and/or the second surface 2 is improved through the second cutting groove 42, so that the first surface 1 and/or the second surface 2 are easier to deform, such as bending or stretching, so that the flexible circuit board can be attached to the uneven mounting area, and the stable mounting of the flexible circuit board is realized.

In one embodiment, as shown in fig. 4, at least two second grooves 42 are disposed on the first surface 1 and/or the second surface 2, the second grooves 42 are disposed along a first direction, and are arranged along a second direction, and the first direction and the second direction form an included angle. In this embodiment, the cutting direction of the second cut groove 42 is different from the arrangement direction, for example, the second cut groove 42 is arranged along the width direction of the flexible circuit board and arranged along the length direction of the flexible circuit board. In this case, the tensile property of the flexible circuit board in the second direction can be increased by the second cut groove 42. When the flexible circuit board is used, the flexible circuit board can be connected with components far away from each other by stretching the flexible circuit board, the requirement of the flexible circuit board on the installation space is further reduced, and the difficulty in planning the internal space of the terminal equipment is reduced.

In one embodiment, as shown in FIG. 5, the secondary cuts 42 are distributed around a predetermined area. The second cut grooves 42 distributed around the predetermined area help the flexible circuit board to generate convex deformation or concave deformation centered on the predetermined area, so that the flexible circuit board can be attached to the mounting area having the convex or concave.

Alternatively, as shown in fig. 5, the second flutes 42 are divergently distributed centering on the predetermined area. It can be understood that, the closer to the predetermined region, the closer the distance between the adjacent second cutting grooves 42, the stronger the deformation capability of the flexible circuit board. When the mounting area has a convex structure or a concave structure, the curvature of the central portion of the convex or concave is the largest, so the second cut grooves 42 with the divergent distribution can be better adapted to the convex or concave structure, so that the flexible circuit board fits the mounting area.

Alternatively, the second cut grooves 42 are distributed around the predetermined area. Alternatively, as shown in fig. 6, at least two annular second cut grooves 42 are disposed on the flexible circuit board, and the annular second cut grooves 42 are concentrically distributed around the predetermined region.

Wherein the annular second cut groove 42 may be a closed annular groove, such as a circular ring, an elliptical ring, a square ring, etc.; or the second cut groove 42 is an annular groove having an opening. When the second cut groove 42 is an annular groove having an opening, a wiring or a solder joint may be disposed at the opening of the second cut groove 42. The deformation capacity of the flexible circuit board can be enhanced more uniformly by surrounding the second cutting grooves 42 concentrically distributed in the preset area, so that stress concentration is avoided when the flexible circuit board is deformed, and the structural stability of the flexible circuit board is optimized.

Alternatively, as shown in fig. 7, the connecting lines of the adjacent second slots 42 are concentrically distributed around the predetermined area. Wherein the second grooves 42 may be a plurality of short linear grooves distributed around the predetermined area. In this case, the second cut groove 42 also contributes to a convex deformation or a concave deformation of the flexible circuit board centered on the predetermined region.

In one embodiment, as shown in fig. 8, in one embodiment, a through hole penetrating the first and second faces 1 and 2 is provided on the flexible circuit board, and the through hole forms a predetermined region. The through hole can also improve the ductility of the flexible circuit board and improve the deformation degree of the flexible circuit board. For example, the flexible circuit board can generate convex deformation or concave deformation with the through hole as the center. And, the second cut groove 42 distributed by surrounding the through hole can further optimize the improvement effect, promote the tension of the flexible circuit board, make the flexible circuit board adapt to different installation conditions.

The through hole can have other functions, for example, when the flexible circuit board is applied to a microphone module, the through hole is a sound receiving hole; when the flexible circuit board is applied to a camera module, the through hole can be selected as a light hole and the like. In this case, the existing structure on the flexible circuit board 2 can be utilized, avoiding complicating the module structure.

In one embodiment, the second cut 42 includes an arcuate end. The arc-shaped end part is beneficial to uniform stress distribution, the flexible circuit board is prevented from being torn along the second cutting groove 42 when being deformed, and the equipment safety is guaranteed. And, the number of the second cut grooves 42 is not limited, and it can be understood that the greater the number of the second cut grooves 42, the stronger the optimization effect on the deformation capability of the flexible circuit board.

It should be noted that, because the first surface 1 and/or the second surface 2 are portions of the flexible circuit board for disposing electronic devices, the second cut groove 42 is disposed on the portions of the first surface 1 and/or the second surface 2 where no electronic devices are disposed, so as to avoid affecting normal use of the circuit board.

A second aspect of the embodiments of the present disclosure provides a terminal device, including the flexible circuit board provided in the first aspect. The terminal device can be selected from a mobile phone, a computer, a notebook computer, a digital broadcast electronic device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant and the like. Due to the flexible circuit board provided by the first aspect, the limitation of planning of the internal space of the terminal equipment is small, and the design and assembly difficulty is lower.

Fig. 9 is a schematic structural view of a flexible circuit board and a module housing in a terminal according to an exemplary embodiment. In one embodiment, as shown in fig. 9, the terminal device further includes a module case 5, and the module case 5 is formed with a receiving cavity 51 having one open end. Wherein, the module housing 5 is connected with the flexible circuit board, and the flexible circuit board seals the accommodating cavity 51. The flexible circuit board includes a second cut groove 42, and the second cut groove 42 is disposed on a portion of the first face 1 and/or the second face 2 corresponding to the receiving cavity 51.

The second cut groove 42 makes the part of the flexible circuit board corresponding to the accommodating cavity 51 easily generate convex or concave deformation, so that the flexible circuit board can be stably attached to the mounting area. Wherein module casing 5 is the casing of microphone module, camera module, infrared sensor module, and this disclosed embodiment does not do specifically and restricts.

Alternatively, the second cut 42 is arranged parallel to the inner wall of the housing chamber 51. Illustratively, when the accommodating chamber 51 is a cylindrical chamber, the inner wall of the accommodating chamber 51 is an arc-shaped surface, and the second cut 42 may be an arc-shaped groove or a circular groove or the like arranged parallel to the inner wall of the accommodating chamber 51. When the accommodating cavity 51 is a cube-shaped cavity, the inner wall of the accommodating cavity 51 is a plane, and the second cut groove 42 may be a linear groove parallel to the inner wall of the accommodating cavity 51, or a square annular groove.

Under such a condition, the distance between the different positions of same second cut groove 42 to the inner wall of holding chamber 51 is the same, consequently when the flexible circuit board appears protruding deformation or sunken deformation, can produce even deformation in second cut groove 42 department, avoids stress distribution inequality to lead to the flexible circuit board to tear along second cut groove 42, ensures terminal equipment's safety in utilization.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. A flexible circuit board, comprising: a first face, a second face, and a side face;

the first side and the second side are oppositely arranged, and the first side and/or the second side are used for arranging electronic devices;

the side surface connects the first surface and the second surface;

and a first cutting groove is arranged on the side surface, and the depth of the first cutting groove is smaller than the width of the flexible circuit board.

2. The flexible circuit board according to claim 1, wherein at least two of the first cut grooves are provided on the side surface;

the at least two first cutting grooves are arranged along the thickness direction of the flexible circuit board and are distributed in an arrangement mode along the length direction and/or the width direction of the flexible circuit board.

3. The flexible circuit board according to claim 2, wherein the first cut groove is provided on both of the side surfaces that are oppositely disposed.

4. The flexible circuit board according to claim 1, wherein the first cut groove includes an arc-shaped inner wall, and the inner wall extends to the first face and/or the second face and forms an arc-shaped opening on the first face and/or the second face.

5. The flexible circuit board according to claim 1, wherein an electronic device is disposed on the first surface and/or the second surface, and a depth of the first cut groove is smaller than a distance from a side surface of the first cut groove to the electronic device.

6. The flexible circuit board of claim 1, wherein a second cut groove is provided on the first face and/or the second face.

7. The flexible circuit board according to claim 6, wherein at least two second cut grooves are provided on the first face and/or the second face;

at least two second cutting grooves are arranged along a first direction and are distributed in a arrayed manner along a second direction, and an included angle is formed between the first direction and the second direction.

8. The flexible circuit board of claim 6, wherein the second cut groove is disposed around a predetermined area.

9. The flexible circuit board according to claim 8, wherein a through hole is provided on the flexible circuit board, the through hole forming the preset region.

10. A terminal device characterized by comprising the flexible circuit board according to any one of claims 1 to 9.

11. The terminal apparatus of claim 10, wherein the terminal further comprises a housing forming a module, the module housing forming a receiving cavity open at one end;

the module shell is connected with the flexible circuit board, and the circuit board blocks the accommodating cavity;

the flexible circuit board is provided with a second cut groove, and the second cut groove is arranged on the part, corresponding to the accommodating cavity, of the first face and/or the second face.

12. The terminal device according to claim 11, wherein the second cut-out is provided parallel to an inner wall of the receiving chamber.

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