CN218160825U

CN218160825U - Middle frame of electronic equipment

Info

Publication number: CN218160825U
Application number: CN202222743653.1U
Authority: CN
Inventors: 李爱华
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2022-12-27
Anticipated expiration: 2032-10-18

Abstract

The utility model relates to a middle frame of electronic equipment, which comprises a frame and a printed circuit board which is integrated with the frame and is arranged in the frame, wherein the printed circuit board and the frame are formed with two holding cavities which are positioned on the front and back surfaces of the frame; the frame is provided with a frame through hole for controlling the electronic equipment. The utility model discloses an adopt printed circuit board to replace traditional metal sheet to have avoided the metal sheet to the influence of electromagnetic field as the bottom plate of center, optimized the transmission of signal, also the cost is reduced, the module circuit unit that sets up on printed circuit board simultaneously has also made things convenient for the circuit connection among the electronic equipment, has improved the space utilization in the equipment, has strengthened product reliability.

Description

Middle frame of electronic equipment

Technical Field

The utility model belongs to the technical field of the electronic equipment technique and specifically relates to an electronic equipment's center.

Background

With the development of science and technology, electronic devices are more and more commonly used in people's lives, such as mobile phones, tablets and the like. In these devices, the main board is usually disposed on the middle frame in the housing, and in the existing devices, the plastic middle frame is made of a plastic frame, and then a metal die-casting board is disposed in the plastic frame, and then a main board and a sub-board connected by a via-connection cable are disposed at opposite ends of the middle frame, and peripheral components such as an antenna, a microphone, a camera, and an earphone are disposed around the periphery of the main board, and are disposed on either the frame or the middle frame or the main board, while the metal die-casting board can attenuate electromagnetic waves, thereby affecting transmission of electromagnetic wave signals, and affecting transmission of signals for electronic devices with communication functions such as mobile phones. The influence of the metal conductor on the antenna is formed by the following parts: the first part is the change of the self impedance of the antenna, and under the condition that the antenna keeps the same distance with metal or insulating material, the metal causes the frequency deviation of the antenna impedance to be far more than the influence of an insulator on the antenna, which can cause the self transmitting and receiving capability of the antenna to be greatly reduced; the second part is absorption of electromagnetic wave energy near the antenna, and after the antenna radiates the electromagnetic wave out of the antenna or before the antenna receives the electromagnetic wave, the metal absorbs a part of energy in the air, so that the energy conversion efficiency of the whole communication system is reduced, and the communication effect is influenced. In principle, the influence of the metal part does not directly change the capability of the antenna, but directly consumes the electromagnetic wave energy in the air outside to influence the communication effect; the third part is the shielding of the metal to electromagnetic wave signals; the third part is that the electromagnetic wave can not penetrate through the metal conductor, one side of the metal conductor can shield signals of the antenna and reflect part of the electromagnetic wave to other directions, if the metal conductor is small, the electromagnetic wave can generally bypass the conductor, but if the metal conductor is very large relative to the antenna, the effect of shielding the signals is very large, and the signals in the direction of the shielding part can be directly shielded.

Meanwhile, the metal die-casting plate also increases the weight of the electronic equipment, the use experience is not good, in order to avoid the influence of the metal plate on electromagnetic signals, the antenna is arranged at a position far away from the metal plate, sufficient space is required to be arranged in the electronic equipment shell, the space layout of the shell is relatively loose, the problem that the space utilization rate of the electronic equipment shell is not high is caused, the installation structure of various electronic components is not stable enough, and the reliability of products is not high.

SUMMERY OF THE UTILITY MODEL

To present not enough, the utility model provides an electronic equipment's center.

The utility model provides a technical scheme that its technical problem adopted is: a middle frame of electronic equipment comprises a frame and a printed circuit board which is integrally formed with the frame and arranged in the frame, wherein two containing cavities which are positioned on the front side and the back side of the frame are formed on the printed circuit board and the frame; and the frame is provided with a frame through hole for controlling the electronic equipment.

Preferably, the printed circuit board is further provided with a switching conductor which is not connected with the module circuit unit and is used for connecting the main board and the auxiliary board of the electronic equipment, and two ends of the switching conductor are provided with patch cord interfaces.

Preferably, the module circuit unit includes any one or more of an antenna circuit unit, a camera circuit unit, a headphone circuit unit, a speaker circuit unit, a power supply circuit unit, and an interface circuit unit.

Preferably, the antenna circuit unit is electrically connected to an antenna provided on the frame or the printed wiring board.

Preferably, the antenna is arranged on a printed circuit board, a mounting groove for mounting the antenna is arranged on the printed circuit board, and a positioning block extends into the mounting groove on the groove wall of the mounting groove.

Preferably, the printed wiring board is provided with a vent hole.

Preferably, the printed circuit board is further provided with a positioning hole.

Preferably, the front and back surfaces of the printed circuit board are further coated with an electrically insulating cured layer surrounding the module circuit unit.

Preferably, the printed wiring board is further provided with a heat dissipation film covering the printed wiring board.

Preferably, the printed wiring board is a single-sided, double-sided or multilayer printed wiring board having a thickness of 1 to 8 mm.

The beneficial effects of the utility model reside in that: the utility model discloses an adopt printed circuit board to come the medium plate as the plastic center, weight is lightened, the influence of metal sheet to electromagnetic wave signal has also been avoided, the transmission of signal has been optimized, the cost is reduced, the module circuit unit who sets up simultaneously on printed circuit board, concentrate the circuit modularization of the peripheral part that traditional dispersion set up and set up, the setting of peripheral part has been made things convenient for, the demand to the space when the circuit module of having solved peripheral part is installed alone, and the mounting structure is stable compact, the space utilization in the equipment is improved, the installation of each electronic components on the peripheral part has been made things convenient for, the structure is more reliable.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic front view of the embodiment of the present invention;

FIG. 3 is a circuit diagram of a power circuit unit according to an embodiment of the present invention;

fig. 4 is a circuit diagram of an interface circuit unit according to an embodiment of the present invention;

fig. 5 is a circuit diagram of a circuit unit of an earphone according to an embodiment of the present invention;

fig. 6 is a circuit diagram of an antenna circuit unit according to an embodiment of the present invention;

fig. 7 is a circuit diagram of a speaker circuit unit according to an embodiment of the present invention;

part names and serial numbers in the figure: 1-frame 10-frame through hole 2-printed circuit board 3-module circuit unit 4-electric connection interface 5-transfer lead 50-transfer line interface 6-antenna 60-mounting groove 61-positioning block 7-ventilation hole 8-positioning block.

Detailed Description

To more clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described with reference to the accompanying drawings and embodiments, which are clearly and completely described, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. Furthermore, directional terms as referred to in the present disclosure, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer only to the direction of the attached drawings, and directional terms used are intended to better and more clearly illustrate and understand the present invention rather than to indicate or imply the orientation the present invention must have, and therefore should not be construed as limiting the present invention.

The embodiment of the utility model is shown in figures 1 to 7, a middle frame of electronic equipment, which comprises a frame 1, a printed circuit board 2 which is integrated with the frame 1 and is arranged in the frame 1, the frame 1 adopts an injection molding plastic frame, the printed circuit board 2 and the frame 1 are integrated to be convenient for production, the middle frames with different shapes are arranged according to the shapes of different electronic equipment, such as corresponding arrangement according to the use requirements of mobile phones, flat plates or game machines, the printed circuit board 2 is a single-sided, double-sided or multi-layer printed circuit board with the thickness of 1-8mm, the single-sided or double-sided printed circuit board adopts a single-sided or double-sided epoxy resin glass fiber copper-clad plate, preferably the epoxy resin glass fiber copper-clad plate with the thickness of 1-3.5mm, such as the single-sided epoxy resin glass fiber copper-clad plate with the thickness of 2.5mm or the double-sided epoxy resin glass fiber copper-clad plate with the thickness of 2mm, before the integrated forming processing of the printed circuit board 2 and the frame 1, a corresponding module circuit unit 3 and a corresponding electric connection interface 4 are arranged on the printed circuit board 2, then a plastic mould is pasted on the surface of the printed circuit board which does not need to be injected, namely, the module circuit unit 3 and the electric connection interface 4 are covered by the plastic mould, then the printed circuit board 2 is placed into an injection mould to be integrally injected with the frame 1, the plastic material of the injection moulding frame 1 can select PBT containing 35 percent of glass fiber by weight or mixture containing 30 percent of PC and ABS, the plastic mould is torn off after the injection moulding is finished, two containing cavities on the front and back surfaces of the frame are formed on the printed circuit board 2 and the frame 1, namely, the printed circuit board 2 is not arranged at the end position of the frame 1, and has a distance with both ends of the frame 1, the front side of the printed circuit board 2 and the side wall of the frame 1 corresponding to one end of the front side of the printed circuit board 2 form a containing cavity of the front side, the back side of the same printed circuit board 2 forms a containing cavity of the back side, one of the two accommodating cavities can be used for installing a mainboard of the electronic equipment, the other one can be used for installing a battery of the electronic equipment, the space in the shell of the electronic equipment is well utilized, a plurality of mutually independent module circuit units 3 are arranged on the printed circuit board 2, i.e. each module circuit unit 3 is not connected, when in use, the corresponding module circuit unit 3 can be selected to be connected with the mainboard according to the requirement, thereby satisfying different requirements, and the arrangement of the module circuit units 3 can reduce the number of components of peripheral components and reduce the difficulty of manufacturing the same, each module circuit unit 3 is provided with an electric connection interface 4 electrically connected with an electronic equipment mainboard and peripheral equipment, that is, each module circuit unit 3 is provided with the electric connection interface 4 connected with the electronic equipment mainboard and the electric connection interface 4 connected with the peripheral equipment, such as the receiver and the microphone of the mobile phone, according to the conventional mobile phone setting, the receiver and the microphone are correspondingly arranged at the upper end and the lower end of the mobile phone, and then the receiver circuit unit and the microphone circuit unit are correspondingly arranged at the upper end and the lower end of the printed circuit board 2, then, an interface for connecting a receiver and an interface for connecting a main board are arranged on the corresponding receiver circuit unit, the microphone circuit unit is provided with an interface for connecting a microphone and an interface for connecting the main board, and the electric connection interface 4 arranged on the module circuit unit 3 adopts any one of the conventional interfaces, such as a serial port, a switching flat cable interface, a coaxial line interface and the like; the frame 1 is provided with a frame through hole 10 for controlling the electronic device, and the frame through hole 10 on the frame 1 is correspondingly used for installing some keys of the electronic device for controlling the electronic device, such as a switch key, a volume adjusting key, an earphone hole, a charging hole for charging the electronic device, and the like. The middle frame utilizes the printed circuit board 2 as the middle plate of the plastic middle frame, thereby reducing the weight, avoiding the influence of a metal plate on electromagnetic wave signals, optimizing the transmission of the signals and lowering the cost, meanwhile, the module circuit unit 3 arranged on the printed circuit board 2 centralizes the circuit modularization of the traditional peripheral parts which are dispersedly arranged, facilitating the arrangement of the peripheral parts, solving the requirement of the circuit module of the peripheral parts on the space when being independently arranged, and the mounting structure is stable and compact, the product reliability is higher, and the space utilization rate in the equipment is improved.

In a further improvement, as shown in fig. 1 and 2, the printed circuit board 2 is further provided with a switching conductor 5 which is not connected with the module circuit unit 3 and is used for connecting a main board and a sub-board of the electronic device, and two ends of the switching conductor 5 are provided with switching line interfaces 50, so that when the main board and the sub-board are arranged in the electronic device, the main board and the sub-board can be connected through the switching conductor 5 arranged on the printed circuit board 2, and the switching conductor 5 is fixed on the printed circuit board 2, so that the installation and the use are convenient, the installation and the use of the main board and other parts are not influenced, and the connection is not carried out by using a switching flat cable or an FPC as in the existing mobile phone, and the adverse effect of easy damage of the FPC in use or the bending generated in the installation on the main board or other parts is avoided. While these peripheral components are connected to the motherboard by wires as axes, the installation structure of these switching lines or wires is not stable enough to affect the installation and application of the motherboard or other components.

In a further improvement, the module circuit unit 3 includes any one or more of an antenna circuit unit, a camera circuit unit, an earphone circuit unit, a speaker circuit unit, a power supply circuit unit, and an interface circuit unit, so that when the electronic device is a mobile phone, circuits of an antenna, a camera, an earphone, a speaker, a power supply, an interface, etc. on the mobile phone can be set on the printed circuit board 2 in advance, and the circuits can adopt circuits corresponding to the modules applied on the existing mobile phone, for example, the camera circuit unit adopts the existing mb1183 camera module, and circuit diagrams of other circuit units are as shown in fig. 3 to 7, so that when the mobile phone is produced, it is not necessary to set corresponding circuits in the mobile phone, and the setting positions of the circuits on the printed circuit board 2 are set according to the application requirements of the electronic device, for the mobile phone, the earphone circuit unit, the antenna circuit unit, and the camera circuit unit are set on the upper portion of the printed circuit board 2 at intervals, and the speaker circuit unit and the power supply circuit unit are set on the lower portion of the printed circuit board 2. After the antenna circuit is arranged on the printed circuit board, the corresponding antenna circuit is electrically connected with the antenna arranged on the frame 1 or the printed circuit board 2, that is, the antenna 6 is also arranged on the frame 1 or the printed circuit board 2 in advance, preferably, the antenna 6 is arranged on the printed circuit board 2, the printed circuit board 2 is provided with a mounting groove 60 for mounting the antenna 6, a positioning block 61 extends into the mounting groove 60 on the groove wall of the mounting groove 60, so that the antenna 6 and the printed circuit board 2 are integrated into a whole, the use is convenient, meanwhile, a plurality of antennas can be arranged on the printed circuit board 2 according to the use requirements, the space in the mobile phone shell cannot be occupied, and the antenna 6 can be conveniently arranged.

In a further modification, as shown in fig. 1 and 2, the printed circuit board 2 is provided with vent holes 7, the vent holes 7 are arranged to facilitate heat dissipation, and the vent holes 7 are arranged at spaced positions of the modular circuit units 3 to separate the plurality of modular circuit units 3 into mutually independent circuit units.

In a further improvement, as shown in fig. 1 and fig. 2, the printed circuit board 2 is further provided with positioning holes 8, so that the mounting and positioning of the middle frame on the electronic device are facilitated, and the positioning holes 8 are preferably arranged at the edge position of the printed circuit board 2, and the arrangement of other parts on the printed circuit board 2 is not affected.

In a further improvement, the front and back sides of the printed circuit board 2 are coated with an electrically insulating cured layer surrounding the module circuit unit 3, the printed circuit board 2 is further provided with a heat dissipation film covering the printed circuit board 2, the cured layer covers the position of the printed circuit board 2 where the module circuit unit is not arranged, the strength of the printed circuit board is enhanced, and the heat dissipation function of the electronic device is further enhanced due to the arrangement of the heat dissipation film.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A middle frame of an electronic device is characterized in that: the electronic equipment comprises a frame and a printed circuit board which is integrated with the frame and arranged in the frame, wherein two containing cavities which are positioned on the front surface and the back surface of the frame are formed on the printed circuit board and the frame; and the frame is provided with a frame through hole for controlling the electronic equipment.

2. The middle frame of the electronic equipment as claimed in claim 1, wherein the printed circuit board is further provided with a switching conductor which is not connected with the module circuit unit and is used for connecting the main board and the auxiliary board of the electronic equipment, and two ends of the switching conductor are provided with patch cord interfaces.

3. The middle frame of the electronic device as claimed in claim 1, wherein the module circuit unit comprises one or more of an antenna circuit unit, a camera circuit unit, a receiver circuit unit, a speaker circuit unit, a power supply circuit unit, and an interface circuit unit.

4. The electronic device middle frame according to claim 3, wherein the antenna circuit unit is electrically connected to an antenna disposed on the frame or the printed circuit board.

5. The middle frame of the electronic device as claimed in claim 4, wherein the antenna is disposed on a printed circuit board, a mounting groove for mounting the antenna is disposed on the printed circuit board, and a positioning block is extended into the mounting groove from a wall of the mounting groove.

6. The electronic device middle frame according to claim 1, wherein a vent hole is formed in the printed circuit board.

7. The electronic device middle frame according to claim 1, wherein the printed circuit board is further provided with a positioning hole.

8. The electronic device as claimed in claim 1, wherein the front and back surfaces of the printed circuit board are further coated with an electrically insulating cured layer surrounding the module circuit unit.

9. The electronic device middle frame according to claim 1, wherein a heat dissipating film is further provided on the printed wiring board so as to cover the printed wiring board.

10. The electronic device middle frame according to claim 1, wherein the printed wiring board is a single-sided, double-sided, or multi-layered printed wiring board having a thickness of 1-8 mm.