CN212727092U

CN212727092U - Terminal and circuit board assembly

Info

Publication number: CN212727092U
Application number: CN202021839893.6U
Authority: CN
Inventors: 程彦荣
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-03-16
Anticipated expiration: 2030-08-28

Abstract

The present disclosure relates to a terminal and a circuit board assembly, the terminal comprising: a middle frame having a through hole; the supporting bracket covers the through hole and is fixed on the middle frame; the first surface of the circuit board is provided with a conductive terminal, and the second surface of the circuit board is fixed on the supporting bracket; the second surface is opposite to the first surface; the through hole is used for a circuit connected with the circuit board to penetrate through. This is disclosed to utilize support bracket and center fixed, realizes that support bracket is fixed to the support of circuit board suspended portion, and in addition, support bracket also can regard as the reinforcement of circuit board when playing the support effect.

Description

Terminal and circuit board assembly

Technical Field

The present disclosure relates to the field of machinery, and more particularly, to a terminal and circuit board assembly.

Background

The terminal takes the cell-phone as an example, and under the condition that the cell-phone is more and more thin, the cell-phone casing is dug the hole and is increased, leads to unanimous some structural components that need support to be in the unsettled state, can't find the support fixed position.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a terminal and a circuit board assembly.

According to a first aspect of the embodiments of the present disclosure, there is provided a terminal, including:

a middle frame having a through hole;

the supporting bracket covers the through hole and is fixed on the middle frame;

the first surface of the circuit board is provided with a conductive terminal, and the second surface of the circuit board is fixed on the supporting bracket; the second surface is opposite to the first surface;

the through hole is used for a circuit connected with the circuit board to penetrate through.

In some embodiments, the cross-sectional length of the support bracket is greater than the cross-sectional length where the circuit board is secured to the support bracket.

In some embodiments, the terminal further comprises:

a connector, comprising: an insulating support and a connection terminal;

the insulating support is positioned on the first surface of the circuit board;

the root of the connecting terminal is fixed on the insulating support, the end part of the connecting terminal is suspended outside the insulating support, and the end part of the connecting terminal is electrically connected with the conductive terminal of the circuit board.

In some embodiments, the middle frame is in butt joint with the supporting bracket, and faces away from the supporting bracket recess, and the supporting bracket is fixed on the recessed portion.

In some embodiments, the through hole is rectangular, and the support bracket is connected with two short sides of the middle frame, which form the through hole.

In some embodiments, the circuit board is a flexible circuit board.

In some embodiments, the support bracket has a strength greater than a strength of the circuit board.

In some embodiments, the support bracket is adhered to the second surface of the circuit board by a first adhesive layer.

In some embodiments, the support bracket is bonded to the center frame by a second adhesive layer.

In some embodiments, the second adhesive layer is a conductive glue.

According to a second aspect of embodiments of the present disclosure, there is provided a circuit board assembly comprising:

a support bracket;

the first surface of the circuit board is provided with a conductive terminal, and the second surface of the circuit board is fixedly bonded with the support bracket; the second surface is opposite the first surface.

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

according to the embodiment, the supporting bracket is fixed with the middle frame, the supporting bracket can support and fix the suspended part of the circuit board, and the supporting bracket can be used for reinforcing the circuit board while playing a role of the bracket.

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 one of partial structural diagrams of a terminal;

fig. 2 is a second partial schematic structure of a terminal;

FIG. 3 is one of the partial block diagrams of a terminal shown in accordance with an exemplary embodiment;

fig. 4 is a second schematic partial structure diagram of a terminal according to an exemplary embodiment;

fig. 5 is an enlarged view of a partial structure of the terminal of fig. 4.

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 devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the description of the present disclosure, it is to be understood that the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 4 and 5, and are not to be construed as limiting the present disclosure.

The terminal of the embodiment of the present disclosure includes:

a middle frame 110 having a through hole 111;

a support bracket 150 covering the through hole 111 and fixed to the middle frame 110;

a circuit board 120 having a first surface with conductive terminals and a second surface fixed on the support bracket 150; the second surface is opposite to the first surface;

and a through hole 111 through which a wire for connection with the circuit board 120 passes.

Generally, in order to increase the strength of the electrical connection portion between the circuit board 120 and other circuits, to prolong the service life of the circuit board 120, and to facilitate the assembly of the circuit board 120, the circuit board 120 is provided with a supporting bracket 150, and the supporting bracket 150 has a reinforcing function. The supporting bracket 150 is fixed to the middle frame 110, so that the supporting bracket 150 can support and fix the suspended portion of the circuit board 120, and the supporting bracket 150 can reinforce the circuit board 120 and can also support the circuit board.

Without limitation, as shown in fig. 3 to 5, the supporting bracket 150 is a plate shape and is attached to the second surface of the circuit board 120. The support bracket 150 of the sheet structure occupies a small space at least in the thickness direction, and facilitates the support and positioning of the circuit board 120 in a small space within the middle frame 110.

The through holes 111 on the middle frame 110 are used for realizing the connection of the lines at different positions. For example: the circuit board 120 is located on the upper surface of the middle frame 110, and the circuit located on the back surface of the middle frame 110 needs to pass through the through hole 111 to be connected with the circuit board 120.

Further, the circuit board 120 and the support bracket 150 have a gap 113 with the middle frame 110, respectively, that is, the support bracket 150 does not completely seal the through hole 111, the top of the support bracket 150 has a gap 113 from the edge of the through hole 111, and the circuit board 120 does not block the gap 113, so that the circuit is connected to the circuit board 120 through the gap.

The circuit connected to the circuit board 120 may be a wire harness or a flat cable. For example, the wiring is a flexible and foldable cord such as a PI (Polyimide) cord or an LCP (Liquid Crystal Polymer) cord. For another example, the wiring is an FPC (Flexible Printed Circuit) cable.

The terminal includes, but is not limited to, a mobile phone, a notebook computer, a tablet computer, a desktop computer, a television, or a wearable device.

In other alternative embodiments, the cross-sectional length of the support bracket 150 is greater than the cross-sectional length where the circuit board 120 is secured to the support bracket 150.

The comparative examples and examples were compared using the terminals shown in fig. 1 and 2 as comparative examples and the terminals shown in fig. 3 to 5 as examples. In the comparative example, the circuit board 120 is partially suspended, and the fixed supporting structure 140 is usually added under the circuit board 120 to support and fix the circuit board 120. As shown in the schematic side view of fig. 2, the additional supporting structure 140 is added to fix the circuit board 120 to the middle frame 110 through the supporting structure 140, and the supporting structure 140 must have a certain thickness, and is too thin to be easily deformed, and cannot play a supporting and positioning role, so that the thickness is increased, which is not favorable for the terminal to be light and thin. The thickness H1 at the overhang of the circuit board 120 in the example is thicker relative to the example, which increases at least the thickness of the support structure 140 relative to the example. In the example of the present disclosure, the supporting structure 140 may be removed, and the length of the reinforcing portion of the circuit board 120 is increased, that is, the length of the cross section of the supporting bracket 150 is increased, so that the length of the cross section of the supporting bracket 150 is greater than the length of the cross section of the fixing portion of the circuit board 120 and the supporting bracket 150, and the supporting bracket 150 is fixed to the middle frame 110, which not only maintains the reinforcing effect of the supporting bracket 150, and makes the supporting bracket 150 serve as a fixing bracket, but also saves the thickness corresponding to the suspending portion of the circuit board 120, and is beneficial to reducing the thickness.

Therefore, the support bracket 150 is lengthened in the example of the present disclosure, which serves as a reinforcement, has a certain structural strength, and serves as a bracket to play a role in supporting and positioning, so that the thickness space at the suspension position of the circuit board 120 is effectively saved without increasing the thickness at the position of the circuit board 120.

In other optional embodiments, the terminal further includes:

a connector 130, comprising: an insulating support 131 and a connection terminal 134;

the insulating support 131 is positioned on the first surface of the circuit board 120;

the root 132 of the connection terminal 134 is fixed on the insulating support 131, the end 133 of the connection terminal 134 is suspended outside the insulating support 131, and the end 133 of the connection terminal 134 is electrically connected to the conductive terminal of the circuit board 120.

In this embodiment, the circuit board 120 is electrically connected to the circuit via the connector 130.

As shown in fig. 3 and 5, the connector 130 is located above the circuit board 120, and the support bracket 150 needs to support not only the circuit board 120 but also the connector 130.

The insulating support 131 serves to support the connection terminal 134. The plurality of connection terminals 134 are arranged in parallel, and the connection terminals 134 may be electrically connected to the conductive terminals of the circuit board 120 by soldering.

The insulating bracket 131 may be made of Polyphenylene sulfide (PPS), acrylonitrile-butadiene-styrene (ABS), Polyoxymethylene (POM), Polycarbonate (PC), or other engineering plastics. The connection terminal 134 may be made of a metal, an alloy, or a metal-plated layer. Without limitation, the connection terminal 134 may take the form of a pin, a bent metal strip, or the like.

In other alternative embodiments, where the middle frame 110 interfaces with the support bracket 150, recessed away from the support bracket 150, the support bracket 150 is secured to the recessed portion 112.

The recess portion 112 facilitates reducing the thickness of the support bracket 150, the circuit board 120, the connector 130, and the like stacked on the middle frame 110. Furthermore, the concave portion 112 can be formed by stamping, and the concave portion 112 has high strength and is more suitable for being used as a fixing portion of the support bracket 150.

As shown in fig. 3, the support bracket 150 may be fixed to the middle frame 110 only at both ends in the first direction. The abutting surface between the middle frame 110 and the supporting bracket 150 along the first direction is recessed downward, and the supporting bracket 150 is fixed on the recessed portion 112.

Alternatively, the support bracket 150 is fixed to the middle frame 110 along the second direction, at an end away from the gap 113. That is, in fig. 4, the left side of the support bracket 150 is partially in contact with the middle frame 110. Thus, the contact area between the supporting bracket 150 and the middle frame 110 can be increased, and the fixing effect can be improved. At this time, the abutting surface of the middle frame 110 and the supporting bracket 150, which is far away from one end of the gap in the second direction, is also recessed downward.

In other alternative embodiments, the through hole 111 is rectangular, and the support bracket 150 is connected to two short sides of the middle frame 110, which form the through hole 111.

As shown in fig. 3, two short edges of the middle frame 110, which form the through holes 111, are distributed along a first direction. Further, the support bracket 150 is connected to one of two long sides of the middle frame 110 where the through-hole 111 is formed.

The shape is not limited to the through hole 111, and other shapes may be selected for the through hole 111 besides the rectangular shape, for example: oval or hexagonal, etc.

In other alternative embodiments, the circuit board 120 is a flexible circuit board 120.

The flexible circuit board 120 is an FPC. Generally, the flexible circuit board 120 has better flexibility but lower strength, and the flexible circuit board 120 further needs to be connected with the supporting bracket 150, so that the supporting bracket 150 not only serves as a reinforcement for the flexible circuit board 120 to provide strength for the flexible circuit board 120, but also serves as a bracket to be fixed with the middle frame 110.

In addition to the flexible circuit board 120, a rigid circuit board 120, such as a PCB board, may be used.

In other alternative embodiments, the strength of the support bracket 150 is greater than the strength of the circuit board 120. So as to ensure the supporting effect of the supporting bracket 150 on the circuit board 120 and the connector 130, and reduce the damage of the supporting bracket 150 caused by plugging and unplugging the circuit and the connector 130.

Without limitation, the support bracket 150 may be a metal bracket, such as steel. Plastic supports, such as engineering plastics like ABS, may also be selected.

In other alternative embodiments, the support bracket 150 is adhered to the second surface of the circuit board 120 by a first adhesive layer 160.

As shown in fig. 5, the support bracket 150 is adhesively fixed to the circuit board 120 by a first adhesive layer 160. The first adhesive layer 160 may be formed by curing a pressure sensitive adhesive such as epoxy resin or acrylate, or may be a double-sided tape.

In addition to the adhesive connection, the support bracket 150 and the circuit board 120 may be connected by soldering. For example, the circuit board 120 has a three-layer structure, wherein a first layer has a conductive terminal, a first surface, and a second layer is an intermediate insulating layer. The third layer forms a second surface of the circuit board 120 and is a metal layer, and at this time, the circuit board 120 and the support bracket 150 may be connected by soldering.

In other alternative embodiments, support bracket 150 is bonded to center frame 110 by second adhesive layer 170.

As shown in fig. 5, the support bracket 150 is adhesively fixed to the middle frame 110 by a second adhesive layer 170. In addition, the support bracket 150 and the middle frame 110 may be fixed by a fastener such as a bolt or a screw.

In other alternative embodiments, the second adhesive layer 170 is a conductive adhesive.

The conductive adhesive can conduct static electricity of the connector 130 or the circuit board 120 to the middle frame 110, and the middle frame 110 can be used as a ground pole to achieve an anti-static effect on the connector 130 or the circuit board 120.

In addition, the second adhesive layer 170 may use a pressure-sensitive adhesive such as epoxy or acrylate instead of the conductive paste.

The disclosed embodiment also provides a circuit board assembly, including:

a support bracket;

When the supporting bracket can be used for electrically connecting the circuit board with other circuits, the strength of the connecting part has a reinforcing effect, the service life of the circuit board can be prolonged, and the circuit board is convenient to assemble with other circuits. Moreover, the supporting bracket can also be used for fixing the circuit board on the middle frame of the terminal, so that the supporting function is realized.

Without limitation, the support bracket is in a sheet shape and is attached to the second surface of the circuit board. The supporting bracket with the sheet structure occupies less space at least in the thickness direction, and is convenient for realizing the supporting and positioning of the circuit board in a smaller space in the middle frame.

In the embodiment of the present disclosure, the circuit board is a flexible circuit board, for example: FPC board, flexible circuit board bendability is better, but intensity is lower, and flexible circuit board more needs the joint support, makes the support both act as the reinforcement of flexible circuit board, provides intensity for flexible circuit board, acts as the support again and realizes the fixed of circuit board.

The second surface may be adhesively secured to the support bracket by double-sided tape or adhesive. For example, when adhesively secured with an adhesive, the adhesive includes, but is not limited to, a pressure sensitive glue such as an epoxy or acrylate, which forms the first adhesive layer upon curing.

In other alternative embodiments, the cross-sectional length of the support bracket is greater than the cross-sectional length of the circuit board where it is secured to the support bracket.

As shown in fig. 3 to 5, when the circuit board assembly is connected to the middle frame 110 having the through hole 111 in the terminal, it is not necessary to additionally provide a support structure, and only the length of the cross section of the support bracket 150 needs to be increased, so that the length of the cross section of the support bracket 150 is greater than the length of the cross section of the fixing position of the circuit board 120 and the support bracket 150, and the support bracket 150 is fixed to the middle frame 110, which not only maintains the reinforcing function of the support bracket 150, and makes the support bracket 150 serve as a fixing bracket, but also saves the thickness corresponding to the suspending position of the circuit board 120, and is beneficial to reducing the.

In other alternative embodiments, the support bracket has a strength greater than the strength of the circuit board. So as to ensure the supporting effect of the supporting bracket on the circuit board.

Without limitation, the support bracket may be a metal bracket, such as steel. Plastic supports, such as engineering plastics like ABS, may also be selected.

Features disclosed in several of the product embodiments provided in this disclosure may be combined in any combination to yield new product embodiments without conflict.

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 disclosure 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

1. A terminal, comprising:

a middle frame having a through hole;

2. A terminal as claimed in claim 1, wherein the cross-sectional length of the support bracket is greater than the cross-sectional length of the circuit board where it is secured to the support bracket.

3. The terminal of claim 1, further comprising:

a connector, comprising: an insulating support and a connection terminal;

the insulating support is positioned on the first surface of the circuit board;

4. The terminal of claim 1, wherein the junction of the center frame and the support bracket faces away from the support bracket recess, and the support bracket is secured to the recess.

5. A terminal according to claim 1, wherein the through hole is rectangular and the support bracket is connected to the two short sides of the middle frame forming the through hole.

6. A terminal according to claim 1, characterised in that the circuit board is a flexible circuit board.

7. A terminal according to claim 1, wherein the support bracket has a strength greater than a strength of the circuit board.

8. A terminal according to claim 1, wherein the support bracket is adhered to the second surface of the circuit board by a first adhesive layer.

9. A terminal according to claim 1, wherein the support bracket is adhered to the center frame by a second adhesive layer.

10. A terminal as claimed in claim 9, characterised in that the second adhesive layer is a conductive glue.

11. A circuit board assembly, comprising:

a support bracket;

12. The circuit board assembly of claim 11, wherein the cross-sectional length of the support bracket is greater than the cross-sectional length of the location where the circuit board is secured to the support bracket.

13. The circuit board assembly of claim 11, wherein the support bracket has a strength greater than a strength of the circuit board.