Mobile communication terminal assembly charged by magnetic electric contact

Abstract

A mobile communication terminal component for charging by means of magnetic attraction and electric contact comprises a mobile communication terminal (200) and a power supply module (400); the communication terminal and the power supply module are mutually attracted by means of magnetic force, and their respective electric contacts are mutually contacted correspondingly, so as to charge a storage battery in the communication terminal; the outer bottom surface of the rear shell (230) of the communication terminal exposes a first power receiving contact group (253 or 273) printed on the first surface of the circuit board (250 or 270) inside the rear shell; the rear shell is also provided with a soft magnetic material (260), which can be the substrate of the printed circuit board (250); the concentric annular rear first power receiving contact group (253) is directly printed on the insulating layer of the iron substrate or on the insulating film covering it; the power supply module has a built-in permanent magnet, and the outer bottom surface of the rear shell (430) has a power supply contact group (453) corresponding to the first power receiving contact group. The component is particularly suitable for use in vehicle and shipping environments, is convenient, has no electromagnetic radiation pollution, and has low material cost.

Description

Technical Field

[0001] The present invention relates to an audio and / or video intelligent terminal, and a power supply for an electric communication terminal, and in particular to a mobile communication terminal component for charging a mobile phone (hereinafter referred to as "mobile phone") by means of magnetic electric contact. Background Art

[0002] Prior art Wireless charging mobile communication terminals, especially wireless charging mobile phones, i.e. mobile phones, which are used by everyone, bring a lot of convenience and fashion to everyone, especially when charging is required in a vehicle or shipping environment. However, this technology is to install a set of induction coil receiving circuits inside the mobile phone shell, and set an oscillation circuit and a transmitting coil for generating radio frequency power in the power supply module. During quick charging, the transmission power is relatively large, and the usually allowable and relatively economical transmission frequency is 200-300kHz, which belongs to the long wave band and will pollute the environment with electromagnetic radiation. Moreover, the wireless transmission of power has low energy utilization efficiency and high material costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to avoid the shortcomings of the above-mentioned prior art and provide a mobile communication terminal component that is directly charged by means of magnetic attraction and electrical contact. The component is a power supply module with a built-in permanent magnet and a mobile communication terminal installed with soft magnetic materials. The power supply and power receiving contact groups are electrically connected one by one by means of magnetic attraction to implement charging, which allows the owner to feel the convenience and speed of using a wireless charging mobile phone, but there is no harm of electromagnetic radiation polluting the environment. Instead, it has the advantages of high power utilization efficiency, low material cost, and thus a relatively low price.

[0004] The technical solution adopted by the present invention to solve the technical problem is a mobile communication terminal component that is charged by means of magnetic attraction electric contact, comprising a mobile communication terminal and a power supply module, wherein the outer bottom surfaces of the rear shells of the communication terminal and the power supply module respectively expose a rear or front power receiving first contact group and a power supply contact group including at least two contacts, and the communication terminal and the power supply module also respectively contain magnetic materials, but at least one of them contains a permanent magnet, and the communication terminal and the power supply module are firmly attracted to each other by magnetic force, so as to realize at least a positive-positive and a negative-negative corresponding electrical connection of the power supply polarity;

[0005] The outer bottom surface of the rear shell of the mobile communication terminal exposes a group of rear or front power-receiving first contacts arranged on a contact circuit board, or directly arranged on the first surface of the main circuit or auxiliary circuit board of the communication terminal; the second surface of the contact circuit board electrically connects the contacts and / or printed circuits on the first surface to the second surface by means of its own conductive vias or by using prefabricated metal parts, or directly extends and electrically connects the contacts of the rear power-receiving first contact group on the first surface to the contacts of the rear power-receiving second contact group on the second surface of the circuit board by means of cables; the contact circuit board is specially arranged for electrical contact charging, and the contacts of the rear power-receiving second contact group on its second surface must also be extended and electrically connected to the circuits involved in charging management on the main circuit or auxiliary circuit board to complete the one-to-one electrical connection for charging the battery;

[0006] The front power receiving first and second contact groups, and the rear power receiving first and second contact groups printed on the contact circuit board, are selected either in the front position or the rear position in the same communication terminal;

[0007] The power supply module includes a magnetic material and a voltage transmission circuit board. The power supply module obtains 12V and / or 24V DC power from the vehicle through its external power socket, and / or directly draws DC power from its built-in energy storage battery or super capacitor, or obtains power from the mains with the help of a power adapter, and converts it into DC power of the required voltage value through the voltage transmission circuit. The rear shell of the mobile communication terminal is firmly attached by magnetic attraction, and then the elastic power supply contact group exposed on the outer bottom surface of the rear shell of the charging module is used to electrically contact the first surface of the contact circuit board exposed on the outer bottom surface of the rear shell of the communication terminal, or the rear or front power receiving first contact group on the first surface of the main circuit or auxiliary circuit board, respectively, to introduce the DC power into the mobile communication terminal to charge the internal battery or super capacitor.

[0008] The magnetic material contained in the mobile communication terminal is a soft magnetic sheet, which is the substrate of the contact circuit board, that is, the circuits on the first surface and the second surface of the contact circuit board and / or each contact of the first and second contact groups receiving power at the rear position, respectively, have at least one side of the circuit and / or contact, which is directly printed on the insulating layer of the soft magnetic sheet, or printed on the insulating film on the surface of the soft magnetic sheet, presenting a printed circuit board Fe-PCB with an iron substrate.

[0009] The rear or front first power-receiving contact group exposed on the outer bottom surface of the rear shell of the communication terminal, printed or riveted on the first surface of the contact circuit board, the main circuit or the auxiliary circuit board, is in the shape of a concentric ring, so as to facilitate one-to-one electrical contact with the elastic contacts of the power supply contact group on the rear shell of the charging module by means of magnetic force, and the charging module can be rotated at any angle around the central axis of the concentric ring-shaped rear or front first power-receiving contact group.

[0010] The soft magnetic material arranged in the rear shell of the communication terminal or on its bottom surface or below is a low-carbon steel sheet with a thickness of 1.50mm≥δ≥0.15mm, while the magnetic material placed in the rear shell of the charging module is a permanent magnet with sufficient magnetism.

[0011] The contact group displayed in the avoidance space on the bottom surface of the rear shell of the communication terminal is a front-position first power-receiving contact group directly printed on the first surface of the main circuit or auxiliary circuit board behind the face shell and the display screen; during charging, the elastic contacts of the power supply contact group on the rear shell of the power supply module pass through the avoidance space of the bottom surface of the rear shell of the communication terminal and the soft magnetic sheet attached thereto, and directly electrically contact the contacts of the first power-receiving contact group that have been connected to the charging management circuit to complete the charging connection.

[0012] The printed circuit on the contact circuit board and the contacts of the rear power receiving first contact group electrically connected thereto on its first surface, as well as the contacts of the rear power receiving second contact group on the second surface of the circuit board, are collectively regarded as one layer A, and the magnetic material and the rear shell are each regarded as one layer, and the three form a three-layer stacked structure; the two layers of the magnetic material and the rear shell avoid the parts that interfere with the rear power receiving first and second contact groups of layer A, and set avoidance positions at the interfering parts to allow the two rear power receiving contact groups to be firmly attracted to the inside and outside of the mobile communication terminal, including the power supply module, by means of magnetic force, so that they can be geometrically connected with them and complete a one-to-one corresponding charging connection.

[0013] The distance between each layer and the display screen of the three-layer stacked structure is that the magnetic material and the back shell are respectively, one is closer than layer A, and the other is farther than layer A; the magnetic material and the back shell respectively avoid the positions of the second power-receiving contact group and the first power-receiving contact group of the rear interference layer A, and set a avoiding position for allowing the second power-receiving contact group to be electrically connected to the charging circuit of the main circuit or auxiliary circuit board inside the mobile communication terminal through a connecting piece, and the power supply modules of the mobile communication terminal are firmly attracted to each other by means of magnetic force, and the contacts of the first power-receiving contact group of the rear position and the power supply contact group of the power supply module are in electrical contact with each other one by one to implement charging.

[0014] The technical solution adopted by the present invention to solve the technical problem can also be a mobile communication terminal that is charged by means of magnetic attraction electric contact, comprising a face shell, a display screen, a main circuit or auxiliary circuit board and a battery or super capacitor accommodated behind the face shell and the display screen, and a rear shell and a soft magnetic material attached to or below the rear shell; the avoidance position on the bottom surface of the rear shell exposes a front or rear power-receiving first contact group printed on the main circuit or auxiliary circuit board or printed on a contact circuit board attached to or below the rear shell, and each includes at least two contacts;

[0015] The second surface of the contact circuit board connects the contacts and / or printed circuits on the first surface to the second surface by means of its own conductive vias or by using prefabricated metal parts, or by means of cables, directly extends the contacts of the first rear power receiving contact group on the first surface and electrically connects them to the contacts of the second rear power receiving contact group on the second surface of the circuit board; the contact circuit board is specially designed for electrical contact charging, and the contacts of the second rear power receiving contact group on its second surface must also be extended and electrically connected to the circuits related to charging management on the main circuit or the auxiliary circuit board to complete the one-to-one electrical connection for charging the battery;

[0016] The first and second contact groups for receiving power in the front position, and the first and second contact groups for receiving power in the rear position printed on the contact circuit board, in the same communication terminal, only one of the two modes, the front position and the rear position, can be selected; a magnetic material is also provided on or below the bottom surface of the rear shell of the communication terminal, or on the first surface of the main circuit or auxiliary circuit board, so that the mobile communication terminal can be attracted by a power supply module with a built-in permanent magnet and charged.

[0017] A soft magnetic sheet stamping part (257) is buried or embedded in the bottom of the communication "terminal rear shell" (230), forming at least two concentric circular rings that are respectively conductive, and the outer surfaces of the two concentric circular rings are flush with the outer bottom surface (232) of the communication "terminal rear shell" (230) or are less than 2.5mm concave or convex than it, and the two concentric circular rings that are respectively conductive on the inner bottom surface (231) of the communication "terminal rear shell" (230) are the contacts of the first rear power receiving contact group (253).

[0018] Compared with the prior art, the present invention has the advantages of no electromagnetic radiation hazard, high power utilization efficiency, few assembly parts, low material cost and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the preferred embodiment 1 of the "mobile communication terminal assembly charged by means of magnetic attraction electric contact" of the present invention, wherein the front power receiving first contact group 273 is directly printed on the first surface 271 of the main circuit or auxiliary circuit board 270 behind the face shell 290 and the display screen 280, and the bottom surface of the rear shell 230 of the communication terminal 200 and the soft magnetic sheet 260 attached thereto are both provided with avoidance positions 233 and 266; the figure shows the disassembled state of the communication terminal 200, and the orthographic main cross-sectional schematic diagram of the attraction process between it and the power supply module 400 during charging, and the capital letter "F" in the figure indicates the direction of the magnetic attraction force;

[0020] Figure 2 yes Figure 1 The communication terminal 200 of the preferred embodiment 1 is a bottom view schematic diagram of the overall orthographic projection after assembly;

[0021] Figure 3 This is the second preferred embodiment of the present invention, the rear power receiving first contact group 253 is printed on the insulating layer or insulating film of the first surface 251 of the circuit board 250 of the iron substrate 260, and is arranged on the first surface 271 of the main circuit or auxiliary circuit board 270 behind the face shell 290 and the display screen 280 of the terminal 200, and the bottom surface of the rear shell 230 is provided with a clearance position 233; the figure shows the disassembled state of the communication terminal 200, and the orthographic cross-sectional schematic diagram of the attraction process between it and the power supply module 400 during charging, and the capital letter "F" in the figure indicates the direction of magnetic attraction;

[0022] Figure 4 This is the third preferred embodiment of the present invention, the rear power receiving first contact group 253 is printed on the first surface 251 of the contact circuit board 250, and together with the soft magnetic material 260, is superimposed and arranged on the inner surface 231 of the rear shell 230 of the communication terminal 200, and the bottom surface of the rear shell 230 is provided with a space 233; the figure shows the disassembled state of the communication terminal 200, and the orthographic cross-sectional schematic diagram of the attraction process between it and the power supply module 400 during charging, and the capital letter "F" in the figure indicates the direction of magnetic attraction;

[0023] Figure 5 yes Figure 3 , Figure 4 In the two preferred embodiments, the communication terminal 200 is shown as an orthographic bottom view, and the figure passes through the bottom surface avoidance 233 of the rear shell 230 of the communication terminal to show the concentric conductive contact rings of the rear power receiving first contact group 253 on the first surface 251 of the contact circuit board 250;

[0024] Figure 6 1 is a schematic diagram of an orthographic bottom view of a rear shell 230 of a communication terminal shown in a fourth preferred embodiment of the present invention, showing the concentric conductive contact rings of a first power receiving contact group 253 printed on a first surface 251 of a circuit board 250 having a soft magnetic material 260 as a substrate and fixed on an outer bottom surface 232 of the rear shell;

[0025] Figure 7 yes Figure 6 The schematic cross-sectional view of the front projection of the communication terminal rear shell 230 of the fourth preferred embodiment is shown. Through the avoidance position 233 on the bottom surface of the rear shell 230, it can be seen that the first contact group 253 of the rear position power receiving contact printed on the first surface 251 of the contact circuit board 250 with a soft magnetic material 260 as the base is attached to the outer bottom surface 232;

[0026] Figure 8 It is the preferred embodiment 4 Figure 7The schematic diagram of the orthographic top view of the rear shell 230 of the communication terminal shown in the figure passes through the avoidance position 233 on the bottom surface of the rear shell 230, showing the contacts of the power receiving second contact group 254 on the inner surface 231 of the rear shell of the terminal;

[0027] Fig. 9 1 is a schematic bottom view of an orthographic projection of a communication terminal rear shell 230 according to a fifth preferred embodiment of the present invention;

[0028] Fig.10 yes Fig. 9 The orthographic front cross-sectional view of the communication terminal rear shell 230 of the preferred embodiment 5 is shown in which, after the rear shell 230 is injection-molded or compression-molded, a contact circuit board with an iron base is embedded at the bottom thereof, or a contact circuit board 250 with a soft magnetic sheet 260 on its second surface 252 is embedded, and a space 266 is provided on the soft magnetic sheet 260;

[0029] Fig.11 It is the preferred embodiment 5 Fig.10 A schematic diagram of a top view of a rear shell 230 of a communication terminal, in which a soft magnetic material 260 is covered on an inner bottom surface 231 of the rear shell, and each contact of the second power receiving contact group 254 can be seen through the space 266 thereof;

[0030] Fig.12 The communication terminal back shell 230 of the preferred embodiment 6 is a schematic diagram of an orthographic front cross-sectional view of a metal sheet (process) stamping part 257 embedded in the bottom thereof during injection molding or compression molding. After the back shell 230 with the embedded stamping part 257 is ejected from the mold, it undergoes a simple post-processing process to present the contacts of the first power receiving contact group 253;

[0031] Fig.13 It is the preferred embodiment six Fig.12 As shown in , after a simple post-processing process, it is a top view cross-sectional schematic diagram of the pre-embedded metal sheet (process) stamping part 257 of each contact of the first power receiving contact group 253;

[0032] Fig.14 It is a schematic diagram of a communication terminal rear shell 230 in a positive projection bottom view of a preferred embodiment 7, the drawing passes through the avoidance position 266 of the soft magnetic sheet 260 fixed to the outer bottom surface 232 of the rear shell, and exposes the contacts of the first power receiving contact group 253 on the first surface 251 of the contact circuit board 250;

[0033] Fig.15 It is the preferred embodiment seven Fig.14The front cross-sectional view of the communication terminal rear shell 230 is a front projection view, showing that the flexible printed circuit FPC extension section 250′ of the contact circuit board 250 or the entire flexible printed circuit 250′ passes through the avoidance position 233 of the outer bottom surface 232 of the rear shell, so that the printed circuit on the contact circuit board 250 and / or 250′ and the first and second contact groups 253 and 254 of the rear position are connected and electrically connected to the inner bottom surface 231 of the rear shell, so as to electrically contact the charging-related contacts on the main circuit or auxiliary circuit board 270 in the rear shell 230;

[0034] Fig.16 It is the preferred embodiment seven Fig.15 Involved, a schematic top view of the orthographic projection of the rear shell 230 of the communication terminal, the figure reveals the rear-position power-receiving second contact group 254 on the inner bottom surface 231 of the rear shell;

[0035] Figures 17 to 19 , is a schematic diagram of the communication terminal rear shell 230 in the eighth preferred embodiment of the present invention in the orthographic bottom view, the front cross-sectional view and the top view, in which the rear position power receiving second contact group 254 exposed on the inner bottom surface 231 of the rear shell and the rear position power receiving first contact group 253 exposed on the outer bottom surface 232 of the rear shell are clearly visible;

[0036] Figure 20 to Figure 22 , is a schematic diagram of the communication terminal rear shell 230 in the ninth preferred embodiment of the present invention, which is a front projection bottom view, a front cross-sectional view and a top view, which clearly shows the rear-positioned second power-receiving contact group 254 that passes through the avoidance position 233 on the inner bottom surface 231 of the rear shell and is offset (of course, it can also be unoffset) on the extended section 250′ of the contact circuit board 250, and the first power-receiving contact group 253 exposed on the outer bottom surface 232 of the rear shell.

[0037] In the above drawings, all the reference numerals refer to the following parts:

[0038] 200 mobile communication terminal; 230 the rear shell of the communication terminal, 231 the inner bottom surface of the rear shell, 232 the outer bottom surface of the rear shell, 233 the avoidance position on the bottom surface of the rear shell; 250 a contact circuit board with a rear power receiving first contact group 253 exposed outwardly printed on its own first surface 251, 250' a flexible extension FPC at one end of the contact circuit board 250 (a rear power receiving second contact group 254 is made on its second surface), 251 the first surface of the contact circuit board 250, 252 the second surface of the circuit board, 253 the rear power receiving first contact group on the first surface, 254 the rear power receiving second contact group on the second surface of the contact circuit board 250 or 250', 257 a metal sheet (process) stamping part pre-buried in the bottom of the terminal rear shell 230, 260 a soft magnetic material, 266 The avoidance space on the soft magnetic material, 270 the main circuit or auxiliary circuit board behind the communication terminal face shell and the display screen, 271 the first surface of the main circuit or auxiliary circuit board 270, 272 the second surface of the main circuit or auxiliary circuit board 270, 273 the front power receiving first contact group printed on the first surface 271 of the main circuit or auxiliary circuit board, 274 the front power receiving second contact group made on the second surface 272 of the main circuit or auxiliary circuit board, 280 display screen, 290 face shell; 400 power supply module, 430 the rear shell of the power supply module, 450 voltage transmission circuit board, 453 power supply contact group, 460 permanent magnet placed in the power supply module, 470 external power socket. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0040] Preferred embodiment 1

[0041] Mobile communication terminal components that use magnetic electrical contacts to complete charging, see Figure 1 , Figure 2 , including a mobile communication terminal 200 and a power supply module 400; the outer bottom surfaces of the rear shells 230 and 430 of the two components 200 and 400 respectively expose a first power receiving contact group 273 and a power supply contact group 453 including at least two contacts, and the two components 200 and 400 also respectively include magnetic materials 260 and 460, and the power supply module 460 in this embodiment is a permanent magnet. The two components are attracted to each other by magnetic force, so as to realize at least a positive-positive and negative-negative electrical connection corresponding to each other in terms of power polarity;

[0042] The outer bottom surface of the rear shell 230 of the mobile communication terminal exposes the front power receiving first contact group 273 arranged on the first surface 271 of the main circuit or the auxiliary circuit board 270; and the magnetic material 260 contained in the terminal rear shell 230 is a soft magnetic low-carbon steel sheet, which is attached to the outer bottom surface of the terminal rear shell 230, and the terminal rear shell 230 and the low-carbon steel sheet 260 attached to the outer bottom surface 232 are provided with through-avoiding positions 233 and 266, so that the front power receiving first contact group 273 is exposed outward; the second surface 272 of the main circuit or the auxiliary circuit board 270 directly extends and electrically connects the contacts of the front power receiving first contact group 273 on the first surface 271 to the contacts of the front power receiving second contact group 274 on the second surface 272 of the circuit board by means of its own conductive vias or by using prefabricated metal parts, and extends and electrically connects them to the circuits involved in charging management in the communication terminal 200, completing a one-to-one corresponding charging connection;

[0043] The power supply module 400 includes a permanent magnet 460 and a voltage transmitter circuit board 450. The charging module 400 obtains 12V and / or 24V DC power from the vehicle through an external power socket 470, and / or directly draws DC power from its built-in energy storage battery, or obtains power from the mains with the help of an adapter, and converts it into DC power of the required voltage value through the voltage transmitter circuit. The mobile communication terminal rear shell 230 is firmly attached by magnetic attraction, and the elastic power supply contact group 453 exposed on the outer bottom surface of the rear shell 430 is used to electrically contact each contact of the front power receiving first contact group 273 on the first surface 271 of the main circuit or auxiliary circuit board 270 in the rear shell 230, respectively, to introduce the DC power into the mobile communication terminal 200 to charge the internal battery or super capacitor.

[0044] Preferred embodiment 2

[0045] See also Figure 3 , Figure 5 , which is different from the first embodiment, the low-carbon steel sheet soft magnetic material 260 included in the mobile communication terminal 200 is already the substrate of the contact circuit board 250, that is, the circuits on the first surface 251 and the second surface 252 of the contact circuit board 250 and / or the contacts of the first and second contact groups 253 and 254 at the rear position are directly printed on the insulating layer of the low-carbon steel sheet soft magnetic material 260 or on the insulating film on the surface of the soft magnetic material, presenting a printed circuit board Fe-PCB with an iron substrate.

[0046] The bottom surface of the rear shell 230 of the mobile communication terminal has an opening 233, which is used as a clearance to expose the rear power receiving contact group 253 on the first surface 251 of the contact circuit board 250 disposed on the first surface 271 of the main circuit or the auxiliary circuit in the mobile communication terminal; the iron substrate Fe- of the contact circuit board 250 also has a clearance 266, which is used to allow the contacts on the main circuit board 270 related to battery charging to be electrically connected to the contacts of the rear power receiving second contact group 254 on the second surface 252 of the contact circuit board 250 one by one;

[0047] The second surface 252 of the contact circuit board connects the contacts and / or printed circuits on the first surface to the second surface by means of its own conductive vias or by using prefabricated metal parts, or by means of cables, directly extends and electrically connects the contacts of the rear-position power-receiving first contact group 253 on the first surface to the contacts of the rear-position power-receiving second contact group 254 on the second surface of the circuit board; and then completes the one-to-one electrical connection for charging the battery by contacting the charging-related contacts on the main circuit board 270.

[0048] The rear power receiving first contact group 253 exposed on the outer bottom surface of the rear shell 230 of the communication terminal and printed or riveted on the first surface 251 of the contact circuit board 250 is shown in FIG. Figure 5 , in the shape of concentric rings, so as to facilitate one-to-one electrical contact with each contact of the power supply contact group 453 on the rear shell 430 of the power supply module 400 by means of magnetic force, and the charging module 400 can be rotated at any angle around the central axis of the concentric ring power-receiving first contact group 253.

[0049] A positioning groove is exposed in the central part of the rear power-receiving first contact group 253, and the groove corresponds to a contact pin in the central part of the power supply contact group 453 of the rear shell 430 of the power supply module 400, which is used for charging positioning, so that the mobile communication terminal 200 is attracted by a power supply module 400 with a built-in permanent magnet 460 for charging and is quickly aligned, and they are electrically connected one by one for charging.

[0050] The soft magnetic material 260 exposed on the bottom surface of the mobile communication terminal rear shell 230 is made of a low-carbon steel sheet with a thickness of 1.50mm≥δ≥0.15mm as a substrate and printed with a first power receiving contact group 253, while the magnetic material 460 built into the charging module rear shell 430 is a permanent magnet.

[0051] Preferred embodiment three

[0052] See also Figure 4 , Figure 5The difference from the previous two embodiments is that the contact circuit board 250 with an iron base is arranged on the inner bottom surface 231 of the rear shell of the communication terminal, and a clearance position 233 is arranged on the bottom surface of the rear shell 230. The iron base of the contact circuit 250 or the low-carbon steel sheet 260 stacked therewith is also provided with a clearance position 266 to facilitate the charging contact group 453 of the charging module 400 to pass through the clearance position 233 to achieve electrical contact and charging of each contact.

[0053] Preferred embodiment 4

[0054] See also Figures 6 to 8 A soft magnetic low-carbon steel sheet 260 is fixed on the outer surface 232 of the rear shell 230, and a contact circuit board 250 is fixed on the steel sheet 260. It can be a rigid printed circuit board PCB or a flexible printed circuit FPC, and a rear-position power-receiving first contact group 253 is printed on the first surface 251 of the circuit board exposed to the outside; an avoidance position 233 is set on the bottom surface of the rear shell 230 of the communication terminal, so that the contacts of the front-position charging group involved in charging management on the first surface 271 of the main circuit or auxiliary circuit board 270 in the rear shell 230 of the communication terminal can be electrically contacted with the contacts of the rear-position power-receiving second contact group 254 on the insulating layer or insulating film of the low-carbon steel sheet 260.

[0055] Preferred embodiment five

[0056] See also Figures 9 to 11 After the rear shell 230 of the communication terminal is injection molded or molded, a contact circuit board 250 is embedded on its bottom surface, and a soft magnetic low-carbon steel sheet 260 with a clearance 266 is provided on it; or an Fe-PCB contact circuit board 250 is directly embedded in the iron substrate and has a rear-position power receiving second contact group 254 on its second surface 252. The second surface 252 of the contact circuit board connects the contacts and / or printed circuits on its first surface to the second surface by means of its own conductive vias or using prefabricated metal parts, or by means of cables, the contacts of the rear-position power receiving first contact group 253 on the first surface are directly extended and electrically connected to the contacts of the rear-position power receiving second contact group 254 on the second surface 252 of the circuit board; and then by contacting the contacts involved in charging on the main circuit board 270, a one-to-one corresponding electrical connection for charging the battery is completed.

[0057] Preferred embodiment six

[0058] See also Fig.12 , Fig.13 When the communication terminal rear shell 230 is injection-molded or molded, a soft magnetic metal sheet (process) stamping part 257 is pre-embedded on its bottom surface. The pre-embedded stamping part 257 is, after a simple post-processing process, the contacts of the rear-position first power-receiving contact group 253; Fig.13It is a schematic top view of the orthographic projection of the pre-embedded soft magnetic metal sheet (process) stamping part 257.

[0059] Preferred embodiment seven

[0060] See also Figures 14 to 16 The rear shell 230 of the communication terminal 200 of the present invention is schematically shown in an orthographic bottom view, a front cross-sectional view and a top view. It is clearly shown in the figure that the FPC extension section 250′ of the contact circuit board 250 or the entirety is a flexible printed circuit 250′, which passes through the avoidance position 233 on the bottom surface of the rear shell 230, so that the printed circuit on the contact circuit board 250 or 250′ and the first and second power-receiving contact groups 253 and 254 at the rear position are connected and electrically connected to the inner bottom surface 231 of the rear shell, so as to electrically contact the various contacts involved in charging on the main circuit board 270 to implement charging.

[0061] Preferred embodiment eight

[0062] See also Figures 17 to 19 The rear shell 230 of the communication terminal of the present invention is a schematic diagram of an orthographic bottom view, a front cross-sectional view and a top view, in which the rear-position power receiving second contact group 254 on the inner bottom surface 231 of the rear shell and the rear-position power receiving first contact group 253 exposed on the outer bottom surface 232 of the rear shell are clearly exposed on the drawing; the soft magnetic low-carbon steel sheet 260 and the power receiving contact circuit board 250 are respectively placed on the inner and outer bottom surfaces 231 and 232 of the rear shell 230, so that the rear-position power receiving first contact group 253 is exposed on the surface of the power receiving contact circuit board 250 on the outer bottom surface 232, see Fig.17 The extended section 250' or the integral FPC contact circuit board 250' passes through the avoidance position 233 on the bottom surface of the rear shell 230, and connects the first rear power receiving contact group 253 on the outer bottom surface 232 of the rear shell to the inner bottom surface 231 of the rear shell to form the second rear power receiving contact group 254, so as to electrically contact the charging-related contacts on the main circuit board 270 to implement charging.

[0063] Preferred embodiment nine

[0064] See also Figure 20 to Figure 22, schematic diagrams of the rear shell 230 of the communication terminal 200 of the present invention in the top view, the main cross-sectional view and the top view. After the rear shell 230 is injection molded or compression molded, a contact circuit board 250 on which the contacts of the rear power receiving first contact group 253 are printed is embedded in its outer surface 232, and a soft magnetic low-carbon steel sheet 260 is superimposed on the circuit board. However, the first surface 251 of the contact circuit board 250 has an extended section FPC, that is, a flexible printed circuit 250'. Of course, the entire circuit board can also be FPC, 250', so that it passes through the avoidance position 233 of the bottom surface of the rear shell 230 of the communication terminal from the side, so that the rear power receiving second contact group 254 on the second surface 251' of the FPC is exposed on the inner bottom surface 231 of the rear shell, and deviates (of course, it can also not deviate) from the position of the central axis of each circular contact ring of the rear power receiving first contact group 253, see Fig. 22 , so that it can electrically contact the charging-related contacts on the main circuit or auxiliary circuit board 270 to implement charging.

Claims

1. A mobile communication terminal assembly for charging by means of magnetic attraction electrical contact, comprising a mobile communication terminal (200) and a power supply module (400), characterized in that: The outer bottom surfaces of the rear shells of the communication terminal (200) and the power supply module (400) respectively expose a rear or front power receiving first contact group and a power supply contact group (453) comprising at least two contacts. The communication terminal (200) and the power supply module (400) also respectively contain magnetic materials, but at least one of them contains a permanent magnet. The communication terminal (200) and the power supply module (400) are mutually attracted by magnetic force to achieve at least a positive-positive and negative-negative electrical connection corresponding to each other in terms of power polarity. The outer bottom surface of the rear shell (230) of the mobile communication terminal exposes a group of first power-receiving contacts arranged on a contact circuit board (250) or directly arranged on the first surface of the main circuit or auxiliary circuit board (270) of the communication terminal; the second surface (252) of the contact circuit board (250) electrically connects the contacts and / or printed circuits on the first surface (251) to the second surface (252) by means of its own conductive vias or by using prefabricated metal parts, or by means of cables, Each contact of the rear power receiving first contact group (253) on the surface directly extends through and is electrically connected to each contact of the rear power receiving second contact group (254) on the second surface of the circuit board; the contact circuit board (250) is specially set up for electrical contact charging, and each contact of the rear power receiving second contact group (254) on its second surface (252) is also extended and electrically connected to the circuit related to charging management on the main circuit or the auxiliary circuit board (270), so as to complete a one-to-one electrical connection for charging the storage battery; A front power receiving first and second contact group and a rear power receiving first and second contact group printed on a contact circuit board (250), in the same communication terminal (200), either the front position or the rear position is selected; The power supply module (400) comprises a magnetic material (460) and a voltage transducer circuit board (450). The power supply module (400) receives 12V and / or 24V DC power from the vehicle through its external power socket (470), and / or directly draws DC power from its built-in energy storage battery or super capacitor, or obtains power from the mains with the aid of a power adapter, and converts it into DC power of a required voltage value through the voltage transducer circuit. The mobile communication terminal rear shell (230) is firmly attached by magnetic attraction, and then, with the aid of a power supply contact group (453) exposed on the outer bottom surface of the charging module rear shell (430), the power supply contact group (453) is electrically contacted with the first surface (251) of the contact circuit board exposed on the outer bottom surface of the communication terminal rear shell (230), or the first surface (271) of the main circuit or auxiliary circuit board, respectively, so as to introduce the DC power into the mobile communication terminal (200) to charge the internal storage battery or super capacitor.

2. The mobile communication terminal assembly according to claim 1, characterized in that: The magnetic material (260) contained in the mobile communication terminal (200) is a soft magnetic sheet material, and is the base of the contact circuit board (250), that is, the circuits on the first surface (251) and the second surface (252) of the contact circuit board (250) and / or the contacts of the first and second contact groups for receiving power at the rear position, respectively, have at least one side of the circuits and / or contacts, which are directly printed on the insulating layer of the soft magnetic sheet material (260), or printed on the insulating film on the surface of the soft magnetic sheet material, presenting a contact circuit board Fe-PCB with an iron base.

3. The mobile communication terminal assembly according to claim 1, characterized in that: The rear or front first power receiving contact group exposed on the outer bottom surface of the rear shell (230) of the communication terminal and printed or riveted on the first surface of the contact circuit board (250), the main circuit or the auxiliary circuit board (270) is in the shape of a concentric ring, so as to facilitate one-to-one electrical contact with each elastic contact of the power supply contact group (453) on the rear shell (430) of the power supply module (400) by means of magnetic force, and the power supply module (400) can be rotated at any angle around the central axis of the concentric ring-shaped rear or front first power receiving contact group.

4. The mobile communication terminal assembly according to claim 1, characterized in that: The soft magnetic material (260) disposed inside the communication terminal rear shell (230) or on its bottom surface or below is a low-carbon steel sheet with a thickness of 1.50 mm ≥ δ ≥ 0.15 mm, while the magnetic material (460) placed inside the charging module rear shell (430) is a permanent magnet with sufficient magnetism.

5. The mobile communication terminal assembly according to claim 1, characterized in that: The contact group displayed on the bottom surface avoidance position (233) of the communication terminal rear shell (230) is a front power receiving first contact group (273) directly printed on the first surface (271) of the main circuit or auxiliary circuit board (270) behind the front shell (290) and the display screen (280); during charging, the elastic contacts of the power supply contact group (453) on the power supply module rear shell (430) pass through the bottom surface of the communication terminal rear shell (230) and the avoidance position of the soft magnetic sheet attached thereto, and directly electrically contact the contacts of the front power receiving first contact group (273) that have been connected to the charging management circuit, thereby completing the charging connection.

6. The mobile communication terminal assembly according to claim 1, characterized in that: The printed circuit on the contact circuit board (250) and the contacts of the rear power receiving first contact group (253) electrically connected thereto on its first surface (251), as well as the contacts of the rear power receiving second contact group (254) on the second surface (252) of the circuit board, are collectively regarded as one layer (A), and the magnetic material (260) and the rear shell (230) are each regarded as one layer, and the three form a three-layer stacked structure; the two layers of the magnetic material (260) and the rear shell (230) avoid the parts that interfere with the rear power receiving first and second contact groups of the layer (A), and set a clearance position at the interfering parts, so that the two rear power receiving contact groups and the inside and outside of the mobile communication terminal (200), including the power supply module (400), can be firmly attracted to each other by magnetic force, and can be geometrically connected therewith and complete a one-to-one corresponding charging connection.

7. The mobile communication terminal assembly according to claim 6, characterized in that: The distance between each layer of the three-layer stacked structure and the display screen (280) is such that the magnetic material (260) and the rear shell (230) are respectively closer to layer (A) and farther from layer (A); the magnetic material (260) and the rear shell (230) respectively avoid the positions of the rear power receiving second contact group (254) and the rear power receiving first contact group (253) of the interference layer (A), and the avoidance position is provided for allowing the rear power receiving second contact group (254) to be electrically connected to the main circuit inside the mobile communication terminal (200) or the charging circuit of the auxiliary circuit board (270) through the connecting piece, so that the mobile communication terminal (200) and the power supply module (400) are firmly attracted to each other by means of magnetic force, and the contacts of the rear power receiving first contact group (253) and the power supply contact group (453) of the power supply module (400) are in electrical contact with each other in a one-to-one correspondence, so as to implement charging.

8. The mobile communication terminal assembly according to claim 6, characterized in that: The distance between each layer and the display screen (280) is such that the magnetic material (260) and the rear shell (230) are closer to the display screen (280) than the layer (A). The magnetic material (260) and the rear shell (230) avoid the position of the rear power receiving second contact group (254) that interferes with the layer (A). The avoidance position is used to allow the rear power receiving second contact group (254) to be electrically connected to the main circuit inside the mobile communication terminal (200) or the charging circuit of the auxiliary circuit board (270) through the connecting piece. The mobile communication terminal (200) and the power supply module (400) are attracted to each other by magnetic force. The contacts of the rear power receiving first contact group (253) and the power supply contact group (453) of the power supply module (400) are in electrical contact with each other in a one-to-one correspondence, so as to implement charging.

9. The mobile communication terminal assembly according to claim 6, characterized in that: The distance between each layer and the display screen (280) is such that the magnetic material (260) and the rear shell (230) are both farther from the display screen (280) than the layer (A). The magnetic material (260) and the rear shell (230) avoid the position of the first power receiving contact group (253) at the rear position that interferes with the layer (A). The avoidance position is used to expose the first power receiving contact group (253) at the rear position on the outer bottom surface of the rear shell (230) of the communication terminal. The mobile communication terminal (200) and the power supply module (400) are mutually attracted by magnetic force. The first power receiving contact group (253) at the rear position and the power supply contact group (453) of the power supply module (400) are mutually electrically contacted in a one-to-one correspondence manner, and the DC power is introduced into the mobile communication terminal (200) to charge the storage battery or super capacitor therein.

10. The mobile communication terminal assembly according to claim 6, characterized in that: At least one layer of the three-layer stacked structure is combined by bonding; the contact circuit board (250) is one of a PCB or an FPC, and a magnetic material (260), and is combined with a communication terminal rear shell (230) to achieve geometric combination and charging connection between the rear power receiving first contact group (253) and the interior of the mobile communication terminal (200).

11. The mobile communication terminal assembly according to claim 1, characterized in that: The outer bottom surface of the rear shell (230) of the mobile communication terminal exposes a rear-position power receiving first contact group (253) arranged on the first surface (251) of the contact circuit board (250), or exposes a front-position power receiving first contact group (273) arranged on the first surface (271) of the main circuit or auxiliary circuit board (270). A positioning groove is set in the central part of the rear-position or front-position power receiving first contact group. The groove corresponds to and adapts to a contact pin protruding in the central part of the power supply contact group (453) of the rear shell (430) of the power supply module (400) for charging positioning and attraction, so that the mobile communication terminal (200) is quickly aligned when being attracted by the power supply module (400) with a built-in permanent magnet (460) for charging, and is electrically connected to each other one by one for charging.

12. A mobile communication terminal (200) that is charged by means of magnetic electrical contact, comprising a face cover (290), display screen (280), characterized in that: It also includes a main circuit or auxiliary circuit board (270) and a storage battery or super capacitor accommodated behind the face shell and the display screen, as well as a rear shell (230) and a soft magnetic material (260) attached to the upper or lower part thereof; the avoidance position (233) on the bottom surface of the rear shell (230) exposes a front or rear power-receiving first contact group printed on the main circuit or auxiliary circuit board (270) or printed on a contact circuit board (250) attached to the upper or lower part of the rear shell (230), and each including at least two contacts; The second surface (252) of the contact circuit board (250) connects the contacts and / or printed circuits on the first surface (251) to the second surface (252) by means of its own conductive vias or by using prefabricated metal parts, or by means of cables, directly extending and electrically connecting the contacts of the rear-position power-receiving first contact group (253) on the first surface to the contacts of the rear-position power-receiving second contact group (254) on the second surface of the circuit board; the contact circuit board (250) is specially designed for electrical contact charging, and the contacts of the rear-position power-receiving second contact group (254) on the second surface (252) must also be extended and electrically connected to the circuits related to charging management on the main circuit or the auxiliary circuit board (270), so as to complete a one-to-one electrical connection for charging the storage battery; A front power receiving first and second contact group, and a rear power receiving first and second contact group printed on a contact circuit board (250), are selected in the same communication terminal (200) in either the front or rear positions; a magnetic material (260) is also provided on the bottom surface or the bottom of the rear shell (230) of the communication terminal, or on the first surface (271) of the main circuit or auxiliary circuit board (270), so as to enable the mobile communication terminal (200) to be attracted by a power supply module (400) with a built-in permanent magnet (460) to implement charging.

13. The mobile communication terminal (200) according to claim 12, characterized in that: The magnetic material (260) disposed inside the mobile communication terminal rear shell (230) or on its bottom surface, or below, or on the main circuit or auxiliary circuit board (270) is a low-carbon steel sheet or strip with a thickness of 1.50 mm ≥ δ ≥ 0.15 mm, and is a soft magnetic material.

14. The mobile communication terminal (200) according to claim 12, characterized in that: The first power receiving contact group exposed through the bottom avoidance space (233) of the rear shell (230) of the communication terminal is a front power receiving first contact group (273) directly printed on the first surface (271) of the main circuit or auxiliary circuit board (270) behind the front shell and the display screen. Each contact of the first contact group (273) is on the main circuit or auxiliary circuit board (270) where it is located. Each contact of the first contact group (273) is extended to electrically connect the circuit related to charging management on its own board, so as to complete a one-to-one electrical connection for charging the battery or super capacitor; The soft magnetic sheet (260) required for magnetic attraction electrical contact is pasted or riveted to the terminal rear shell On or below the bottom surface of the terminal rear shell (230), the opening on the soft magnetic sheet (260) overlaps with the opening on the bottom surface of the terminal rear shell (230), and together form a space to avoid air leakage.

15. The mobile communication terminal (200) according to claim 12, characterized in that: The magnetic material (260) contained in the mobile communication terminal (200) is a soft magnetic sheet material, and is the base of the contact circuit board (250), that is, the circuits on the first surface and the second surface of the contact circuit board (250) and / or the contacts of the first and second contact groups at the rear position are directly printed on the insulating layer of the soft magnetic sheet material (260) or on the insulating film on the surface of the soft magnetic sheet material, presenting a contact circuit board Fe-PCB with an iron base.

16. The mobile communication terminal (200) according to claim 12, characterized in that: The bottom surface of the rear shell (230) of the mobile communication terminal is provided with an opening (233) for exposing a rear-position power-receiving first contact group (253) on the first surface (251) of a contact circuit board (250) disposed on the inner bottom surface (231) of the rear shell of the communication terminal; the contact circuit board (250) is covered with a soft magnetic material (260), and a clearance position (266) is provided on the soft magnetic material (260) for electrically connecting each contact related to battery charging on the main circuit or auxiliary circuit board (270) to each contact of the rear-position power-receiving second contact group (254) on the second surface (252) of the contact circuit board (250) on the inner bottom surface (231) of the rear shell.

17. The mobile communication terminal (200) according to claim 12, characterized in that: After the communication terminal rear shell (230) is injection-molded or molded, a contact circuit board (250) with an iron substrate is embedded therein, or a contact circuit board (250) with a soft magnetic sheet (260) on its own second surface (252), and a rear-position power-receiving second contact group (254) is provided on the second surface (252) for directly extending and electrically connecting the respective contacts of the rear-position power-receiving first contact group (253) on the first surface (251) of the contact circuit board (250) to the respective contacts of the power-receiving second contact group (254) on the second surface (252) of the contact circuit board, and then electrically connecting the respective contacts involved in charging on the main circuit or auxiliary circuit board (270) to complete a one-to-one corresponding electrical connection for charging the storage battery; and a clearance position (266) is provided on the soft magnetic sheet (260) superimposed on the second surface (252) of the contact circuit board itself.

18. The mobile communication terminal (200) according to claim 12, characterized in that: The contact circuit board (250) is a common insulating board PCB or FPC which is pasted onto the soft magnetic sheet (260), or is completed using a metal sheet as a base using a PCB process.

19. The mobile communication terminal according to claim 12, characterized in that: A soft magnetic sheet stamping part (257) is buried or embedded in the bottom of the communication "terminal rear shell" to form at least two concentric circular rings that are respectively conductive, and the outer surfaces of the two concentric circular rings are flush with the outer bottom surface (232) of the communication "terminal rear shell" or are less than 2.5 mm concave or convex therefrom. The two concentric circular rings that are respectively conductive on the inner bottom surface (231) of the communication "terminal rear shell" are the contacts of the first rear power receiving contact group (253).

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