CN218277614U

CN218277614U - Back-pasting type function expansion board

Info

Publication number: CN218277614U
Application number: CN202221734857.2U
Authority: CN
Inventors: 巩振武
Original assignee: Bangge Dongguan Technology Co ltd
Current assignee: Bangge Dongguan Technology Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2023-01-10
Anticipated expiration: 2032-07-05

Abstract

The utility model discloses a back of body pastes formula function expansion board, it includes substrate board, the back of the body of pasting and pastes even firmware, be provided with hollow out construction on the substrate board, the back of the body of pasting the body and for the lamellar body that has terminal surface I and terminal surface II made by hot good conductor material, be provided with convex structure on the terminal surface I. The back attachment body end face I is fixedly contacted with the side face I or the side face II of the base material plate, and after the back attachment body is connected with the base material plate, the boss structure of the back attachment body is arranged in the hollow structure of the base material plate and fills the vacancy of the hollow structure. The end face III of the pasting and fixing piece is provided with a viscous material, the end face IV of the pasting and fixing piece is fixedly contacted with the base material plate or the back attachment body, and the expansion plate is fixedly pasted on the back of the 3C product through the viscous material pasted on the end face III of the pasting and fixing piece. The utility model discloses its profitable effect is, extend that two terminal surfaces of its heat conduction back of body that is made by hot good conductor material of board are direct to contact heat conduction efficiency height with radiator and 3C product backplate.

Description

Back-pasting type function expansion board

Technical Field

The utility model belongs to the technical field of the 3C electronic product, concretely relates to be used for 3C electronic terminal product to connect heat dissipation and supplementary extension paster board of wireless charging.

Background

With the continuous enhancement of system programs of interactive 3C electronic products such as mobile phones and tablet computers, the capacity of built-in batteries is continuously increased, and the quantity and the types of various built-in functional software are also continuously increased. When various kinds of functional software are operated in electronic products for a long time, heat generated by both the CPU and the battery of the system is accumulated inside the electronic products.

In order to solve the problem of heat dissipation of electronic products such as mobile phones and tablet computers, manufacturers research and develop and produce an external radiator for the mobile phones and the tablet computers, the radiator is additionally hung on the back of the mobile phones and the tablet computers, a refrigeration end of the radiator is attached to the back of the mobile phones and the tablet computers, and the refrigeration end of the radiator guides the insides of the mobile phones and the tablet computers out through the back and emits the insides of the mobile phones and the tablet computers to the outside so as to achieve the purpose of heat dissipation. Because cell-phone, panel computer 3C backplate all have certain curved surface radian, the refrigeration end of radiator is relatively poor to the radiating effect of product after being connected with the different backplates of curved surface radian, for solving this problem, the refrigeration end of radiator leads the subsides in order to realize being connected of the two through the heat dissipation of pasting on the 3C product backplate.

The heat dissipation conducting sticker comprises a base material plate, a back pasting plate made of good thermal conductor materials and a pasting connecting piece, wherein the two-layer structure or the three-layer structure is formed by sequentially arranging the base material plate, the back pasting plate made of the good thermal conductor materials and the pasting connecting piece from outside to inside, the base material plate is pasted with the refrigerating end of the radiator, the back pasting plate is pasted with the 3C product back plate, and the heat dissipation conducting sticker is pasted on the 3C product back plate through the pasting connecting piece. The inside heat of 3C product just can conduct the system cold junction for the radiator through its backplate and the back flitch, the base material board that the heat dissipation pasted, though it also has higher heat conductivity of base material board, the inside heat of 3C product is through the conduction of two-layer structure of back flitch and base material board, and its heat conduction effect receives the influence and also exists objectively to further influence the refrigeration radiating effect for the radiator.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a back of body pastes formula function extension board, the both ends face of the back of body flitch that the good conductor material of its inside heat that sets up was made is direct to be contacted with the refrigeration end of 3C product backplate and radiator, and the back of body flitch direct conduction that the heat that the 3C product is inside dispels the heat leads the heat conduction and pastes gives the refrigeration end of radiator, receives the influence that the heat dissipation led multilayer structure when avoiding the heat of 3C product inside to derive.

The utility model relates to a technical scheme that formula function expansion board was adopted is pasted on the back does, include the substrate board, paste the body on the back and paste even firmware, be provided with hollow out construction on the substrate board, the body on the back is the lamellar body that has terminal surface I and terminal surface II made by hot good conductor material, is provided with boss structure on the terminal surface I. The back paster body is characterized in that the end face I of the back paster body is fixedly contacted with the plate face I or the plate face II of the base material plate, after the back paster body is connected with the base material plate, the boss structure of the back paster body is arranged in the hollow structure of the base material plate and fills the vacancy of the hollow structure, the end face III of the pasting connecting piece is provided with a viscous material, and the end face IV of the pasting connecting piece is fixedly contacted with the base material plate or the back paster body. After the base material plate, the back attachment body and the sticking and fixing piece are contacted and fixed, the front end of the boss structure of the end face I of the back attachment body is an outer facing I of the expansion plate, and the end face II of the back attachment body is an outer facing II of the expansion plate. The expansion board is fixed on the back of the first 3C electronic product through the adhesive material adhered to the end face III of the fixing piece.

The utility model relates to a back of body pastes formula function expansion board its base material board, back of body paste and paste its structure of even firmware and range have following three kinds of modes.

Specific mode one, the utility model relates to a back of body pastes formula function expansion board, its it is the frame structure to paste even firmware, and the outer fringe at the face I of substrate board is fixed in the IV bonds of its terminal surface, the back of body pastes the body and arranges in the inner frame chamber of pasting even firmware, and I boss structure of its terminal surface is the lamellar face all around and I bonding of the face of substrate board are fixed, its boss structure front end of the back of body pastes its boss structure contact with the laminating of second 3C electronic product, its terminal surface II and the contact of the laminating of the first 3C electronic product back.

In a second specific mode, the utility model relates to a back of body formula function expansion board, its be provided with the frame form recess on the non-boss structure's of back of body terminal surface II, it is the frame form structure to paste the fastener, and the frame form recess at back of body terminal surface II is fixed in the bonding of its terminal surface IV. The sheet end around the boss structure I on the end face of the back attachment body is fixedly bonded with the plate face I of the base material plate, the front end of the boss structure of the back attachment body is in contact with the second 3C electronic product in a fitting mode, and the end face II of the back attachment body is in contact with the back face of the first 3C electronic product in a fitting mode.

Specific mode three, the utility model relates to a back of body pastes formula function expansion board, its I boss structure of back of body terminal surface all around the piece end of body and the I bonding of face of substrate board are fixed, it is the frame-shaped structure to paste the fastener, and its terminal surface IV bonds fixedly with II bases board faces, its boss structure front end of back of body and the contact of laminating of the first 3C electronic product back, its terminal surface II and the contact of laminating of second 3C electronic product.

Furthermore, in the first connection mode, the second connection mode and the third connection mode of the substrate board, the back attachment body and the adhesive connecting piece, an inner ring groove is arranged on the substrate board or the back attachment body, and a magnetic body or an iron material body is arranged in the inner ring groove.

As optional, in the utility model relates to a back of body pastes formula function expansion board, its be provided with rechargeable battery, control circuit board I and wire in the back of body pastes, rechargeable battery is connected with I electricity of control circuit board. The inner end of the wire is connected with the control circuit board I, and the outer end of the wire extends out of the base material board and is provided with a plug connected with the charging port of the first or second 3C electronic product.

As optional the utility model relates to a back of body pastes among formula function expansion board, be provided with wireless charging coil, control circuit board II and wire in the back of body, wireless charging coil is connected with II electricity of control circuit board, and its inner of wire is connected with wireless charging coil or control circuit board II, and its outer end extends the substrate board and is provided with and first or second 3C electronic product charges the continuous plug of mouth.

As optional the utility model relates to a back of body pastes in formula function expansion board, the substrate board is solar photovoltaic cell panel, the internal control circuit board III including photoelectric conversion circuit and current inverter circuit that is provided with of back of body paste, substrate board and the III electricity of control circuit board are connected. The inner end of the wire is connected with the control circuit board III, and the outer end of the wire extends out of the base material board and is provided with a plug connected with the charging port of the first or second 3C electronic product.

As optional in the utility model relates to a back of body pastes formula function expansion board, the plug is provided with the disjunctor structure of socket for rear end or side, and when the plug and external electronic product's the mouth that charges be connected fixed back, the socket exposes in the mouth outside that charges.

As optional in the utility model relates to a back of body pastes formula function expansion board, still including with expansion board swivelling joint is collapsible opens closed support frame, and the width on the inner ring limit in support frame both sides is greater than the width of function expansion board, the support frame pass through the pivot frame that substrate board face both sides edge symmetry set up with function expansion board swivelling joint.

The beneficial effects of the utility model are that:

1. be provided with hollow out construction on the substrate board, be provided with boss structure on the back of the body paster body terminal surface I, after the back of the body paster body is connected with the substrate board, its boss structure is arranged in the hollow out construction of substrate board and is filled the hollow out construction vacancy. Two end faces of the heat conduction back attachment body of the expansion board with the structure are directly contacted with the first 3C electronic product and the second 3C electronic product, and the heat conduction efficiency is high.

2. The back attachment body is provided with a rechargeable battery and a wireless charging coil, so that the expansion plate has a charging function for the first or second 3C electronic product.

3. The base material board is a solar photovoltaic cell board, so that the expansion board can convert solar energy into electric energy to charge the 3C electronic product, and the expansion board has an emergency charging function in an emergency.

4. The plug is the disjunctor structure that the rear end was provided with the socket for the expansion board can charge for a plurality of 3C products, also can provide reverse wireless charging for 3C electronic product through the expansion board.

The advantages of the invention are not limited to the description, but rather are described in greater detail in the detailed description for better understanding.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is the utility model discloses a three-dimensional schematic diagram of whole application layout of back of body formula function expansion board

FIG. 2 is a schematic three-dimensional view (I) of a second embodiment of a back-attached function expanding board structure of the present invention

FIG. 3 is a schematic three-dimensional view (II) of a second embodiment of a back-attached type function-expanding board structure of the present invention

FIG. 4 is a three-dimensional schematic view (I) of the first embodiment of the back-pasting type function expanding plate structure of the present invention

FIG. 5 is a schematic three-dimensional view (two) of the first embodiment of the back-pasting type function expanding plate structure of the present invention

FIG. 6 is a three-dimensional schematic view (III) of the first embodiment of the back-pasting type function expanding plate structure of the present invention

FIG. 7 is a three-dimensional schematic view (A) of a third embodiment of a back-attached type function expanding plate structure of the present invention

FIG. 8 is a three-dimensional schematic view (II) of a third embodiment of the back-pasting type function expanding board structure of the present invention

FIG. 9 is a three-dimensional schematic view (III) of a third embodiment of the back-pasting type function expanding plate structure of the present invention

FIG. 10 is a three-dimensional schematic view of a magnetic attraction body of a back-pasting type function expansion board of the present invention

FIG. 11 is a three-dimensional schematic view (one) of the back-pasting type function expansion board of the present invention

FIG. 12 is a schematic three-dimensional view (two) of the back-pasting type function expansion board of the present invention

FIG. 13 is a three-dimensional schematic view (III) of the back-pasting type function expansion board of the present invention

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

The invention will be further explained with reference to the drawings and the specific embodiments.

The utility model relates to a back of body pastes formula function expansion board, as shown in fig. 1-fig. 9, function expansion board A includes base material board 1, the back of the body of pasting 2 and pastes even firmware 3, be provided with hollow out construction 1a on the base material board 1, the back of the body of pasting 2 is the lamellar body that has terminal surface I2 a and terminal surface II 2c made by the good conductor material of heat, is provided with convex structure 2b on the terminal surface I2 a.

The back of the body 2 terminal surface I2 a and 1 face I1 a or face II 1b contact fixedly of base material board, after back of the body 2 is connected with base material board 1, its convex structure 2b is arranged in hollow out construction 1a of base material board 1 and fills hollow out construction 1a vacancy.

The adhesive connecting piece is characterized in that a sticky material is arranged on the end face III 3a of the adhesive connecting piece 3, the end face IV 3b of the adhesive connecting piece is fixedly contacted with the base material plate 1 or the back attachment body 2, after the base material plate 1, the back attachment body 2 and the adhesive connecting piece 3 are fixedly contacted, the front end of a boss structure 2b of the end face I2 a of the back attachment body 2 is an outer facing IA 1 of the expansion plate A, and the end face II 2c of the back attachment body is an outer facing IIA 2 of the expansion plate A.

The end face III 3a of the pasting connecting piece 3 is provided with a viscous material, the end face IV 3B of the pasting connecting piece is fixedly contacted with the base material plate 1 or the back attachment body 2, and the expansion plate A is fixedly pasted on the back face of the first 3C electronic product B through the viscous material of the end face III 3a of the pasting fixing piece 3.

The utility model relates to a back of body pastes formula function expansion board, the substrate board is made by hard material, and it bears support body supporting role in the expansion board, and its material can adopt but not limited to iron, aluminium, or copper, plastics, glass, pottery etc. and the combined material that above-mentioned hard material constitutes.

The back attachment body plays a role in heat conduction in the expansion plate, and the adopted good heat conductor materials include but are not limited to materials with the heat conductivity coefficient reaching 2, such as ceramics, heat-conducting silica gel, graphite and the like, and composite materials consisting of the heat-conducting materials. Preferably, the back attachment body is made of good conductor materials such as heat-conducting silica gel and the like with certain plasticity and soft body heat.

The sticking and fixing piece has a repeatable sticky connection function with the 3C product back plate in the expansion plate, and sticky materials arranged on the end surface III 3a of the sticking and fixing piece comprise but are not limited to glue, double-sided adhesive, a nanometer sticking layer, reusable removable sticking materials and composite materials formed by the materials.

Specifically, the utility model relates to a back of body pastes formula function extension board its base material board 1, back of body subsides body 2 and paste connecting part 3 its structure and range have following three kinds of embodiments

In a first embodiment, as shown in fig. 4-6, the expansion board includes a substrate board 1, a back attachment body 2 and a sticking fastener 3, and a hollow structure 1a is disposed on the substrate board 1. The back attachment body 2 is a sheet body which is made of a good thermal conductor material and is provided with an end face I2 a and an end face II 2c, and a boss structure 2b is arranged on the end face I2 a.

After the back attachment body 2 is connected with the base material plate 1, the boss structure 2b of the back attachment body is arranged in the hollow structure 1a of the base material plate 1 and fills the vacancy of the hollow structure 1a, and the sheet body surface around the boss structure 2b with the end surface I2 a is fixedly bonded with the plate surface I1 b of the base material plate 1.

The adhesive connecting and fixing piece 3 is of a frame structure, an end face III 3a of the adhesive connecting and fixing piece is provided with an adhesive material, an end face IV 3b of the adhesive connecting and fixing piece is fixedly adhered to the outer edge of the board face I1 b of the base material board 1, and the back attachment body 2 is arranged in an inner frame cavity of the adhesive connecting and fixing piece 3. The back-attaching type function extension board A is fixed on the back of a first 3C electronic product B through an adhesive material which is attached to the end face III 3a of the fixing piece, the front end of a boss structure 2B of the back-attaching body 2 is in contact with a second 3C electronic product (drawn in the figure), and an end face II 2C of the back-attaching type function extension board is in contact with the back of the first 3C electronic product B in an attaching mode.

In the second embodiment, as shown in fig. 1-3, the expansion board a includes a substrate board 1, a back attachment body 2 and a pasting connection member 3, the substrate board 1 is provided with a hollow structure 1a, the back attachment body 2 is a sheet body made of a good thermal conductor material and having an end face i 2a and an end face ii 2c, a boss structure 2b is provided on the end face i 2a, and a frame-shaped groove 2d is provided on the end face ii 2c of the back attachment body 2, which is not the boss structure.

The sticking and fixing piece 3 is of a frame-shaped structure, the end face III 3a of the sticking and fixing piece is provided with a sticky material, and the end face IV 3b of the sticking and fixing piece is stuck and fixed in the frame-shaped groove 2d of the end face II 2c of the back sticking body 2. The back-attaching type function extension board A is fixed on the back of a first 3C electronic product B through an adhesive material which is attached to the end face III 3a of the fixing piece, the front end of a boss structure 2B of the back-attaching body 2 is in contact with a second 3C electronic product (drawn in the figure), and an end face II 2C of the back-attaching type function extension board is in contact with the back of the first 3C electronic product B in an attaching mode.

In the third embodiment, as shown in fig. 7 to 9, the expansion board includes a base material board 1, a back attachment body 2, and an adhesive connecting piece 3, and a hollowed-out structure 1a is arranged on the base material board 1. The back attachment body 2 is a sheet body which is made of a good thermal conductor material and is provided with an end face I2 a and an end face II 2c, and a boss structure 2b is arranged on the end face I2 a.

After the back attachment body 2 is connected with the base material plate 1, the boss structure 2b is arranged in the hollow structure 1a of the base material plate 1 and fills the vacancy of the hollow structure 1a, the sheet body surface around the boss structure 2b with the end surface I2 a is fixedly bonded with the plate surface I1 b of the base material plate 1, the bonding and fixing part 3 is of a frame-shaped structure, and the end surface IV 3b is fixedly bonded with the plate surface II 1c of the base material plate 1. The back-attaching type function extension board A is fixed on the back of a first 3C electronic product B through an adhesive material which is attached to the end face III 3a of the fixing piece, the front end of a boss structure 2B of the back-attaching body 2 is in contact with a second 3C electronic product (drawn in the figure), and an end face II 2C of the back-attaching type function extension board is in contact with the back of the first 3C electronic product B in an attaching mode.

In the first, second, and third embodiments, the first 3C electronic product is a mobile phone, a tablet computer, a notebook computer, or the like, and the second 3C electronic product is a heat sink, a wireless charger, a wireless charging portable power source, a mobile phone, or the like.

For making the utility model discloses back of the body pastes the convenience that formula function extended board and radiator interconnect laminating contact, extend the inboard be equipped with set up the magnetism that magnet ring looks magnetism was inhaled in the second 3C electronic product and inhale the material. When the substrate plate is made of iron or steel materials, the substrate plate is used as a magnetic material which is magnetically attracted with the magnet ring arranged in the radiator. When the substrate plate is made of non-magnetic materials such as aluminum, copper, plastics, glass, ceramics and the like, the expansion plate is internally provided with a magnetic suction body or an iron material body.

Specifically, in the first embodiment, as shown in fig. 3, the plate surface i 1b of the substrate plate 1 is provided with the annular groove 12a, and the magnetic attraction body 41 or the ferrous material body 42 is embedded in the annular groove 12a provided on the plate surface i 1b of the substrate plate 1.

Specifically, in the second embodiment, as shown in fig. 6, the plate surface i 1b of the substrate plate 1 is provided with the annular groove 12a, and the magnetic attraction body 41 or the ferrous material body 42 is embedded in the annular groove 12a provided on the plate surface i 1b of the substrate plate 1.

Specifically, in the third embodiment, as shown in fig. 9, the end surface i 2a of the back attachment body 2 is provided with the annular groove 12a, and the magnetic attraction body 41 or the ferrous material body 42 is embedded in the end surface i 2a of the back attachment body 2 and is provided in the annular groove 12 a.

Furthermore, the utility model relates to a back of body formula function expansion board its magnetism suction means, concrete structure is shown in fig. 10, magnetism suction means 41 comprises the ring piece 41a and the a plurality of permanent magnetism pieces 41b of clamping in two ring pieces 41a that bilateral symmetry set up, and the even array cladding of a plurality of permanent magnetism pieces 41b is fixed by between two ring pieces 41 a.

For increasing the utility model relates to a back of body pastes its practicality of formula function expansion board and extends the function, makes it further have the function of charging for the 3C product on its original basis of extending the board.

Optionally, as shown in fig. 11, a rechargeable battery 5, a control circuit board i 6 and a lead 7 are arranged in the back attachment body 2, and the rechargeable battery 5 is electrically connected with the control circuit board i 6. The inner end of the lead 7 is electrically connected with the control circuit board I61, and the outer end of the lead 7 extends out of the base material plate 1 and is provided with a plug 8 connected with a charging port of the first or second 3C electronic product. The plug 8 can be after being connected with external power adapter rechargeable battery 5 charges, plug 8 can charge for first 3C electronic product B after being connected with first 3C electronic product B, function expansion board A has precious function of charging concurrently.

Optionally, as shown in fig. 12, a wireless charging coil 9, a control circuit board ii 62 and a wire 7 are arranged in the back attachment body 2, an inner end of the wire 7 is connected to the wireless charging coil 9 or the control circuit board ii 62, and an outer end thereof extends out of the base material plate 1 and is provided with a plug 8 connected to a charging port of the first or second 3C electronic product. And the plug 8 is connected with the first 3C product B and then can be charged for the 3C product B by connecting an external line charger through a wireless charging coil 9. 3C product B that does not have wireless function of charging is through bonding the utility model relates to a back of body pastes formula function expansion board can make it have wireless function of charging.

Alternatively, referring to fig. 12 and fig. 13, in the first and second embodiments of the structure and arrangement of a back-attached type function extension board of the present invention, the substrate board 1, the back-attached body 2 and the attaching/connecting member 3 is configured as a solar photovoltaic panel. The back attachment body 2 is internally provided with a control circuit board III 63 comprising a photoelectric conversion circuit 63a and a current inverter circuit 63b, and the base material board 1 is electrically connected with the control circuit board III 63. The inner end of the lead 7 is connected with the control circuit board III 63, and the outer end of the lead extends out of the base material plate 1 and is provided with a plug 8 connected with a charging port of an electronic product. The light energy absorbed by the substrate board 1 is converted into alternating current through the photoelectric conversion circuit 51 and the current inverter circuit 52, and the alternating current is charged for the 3C product B through the lead 7.

For further increase the utility model relates to a back of body pastes its practicality of formula function expansion board and extends the function, makes it have the function of charging simultaneously for two 3C products. Specifically, as shown in fig. 13, the plug 8 is a connected structure in which a socket 8a is disposed at the rear end or at the side edge, and when the plug 8 is connected and fixed with the charging port of the external electronic product B, the socket 8a is exposed outside the charging port. When the end of the external power adapter is inserted into the socket 8a, one path of current enters the 3C product B through the plug 8 to be charged, and the other path of current can be wirelessly charged for other 3C products through the lead 7 and the wireless charging coil 9.

As optional, refer to fig. 13, the utility model relates to a back of body pastes formula function expansion board it still including with the collapsible closed support frame 10 of opening of function expansion board A swivelling joint, the width of the inner ring limit in support frame 10 both sides is greater than function expansion board A's width, support frame 10 through 1d of the pivot that 1 face both sides edge symmetry set up of base material board with function expansion board A swivelling joint. Under the normal state, the support frame 10 is rotated, folded, stored and aligned with the expansion board A, and when needed, the support frame 10 is rotated to form a certain angle with the expansion board A, and then the support frame 10 is used for supporting the 3C product B.

The above is the detailed introduction of the back-pasting type function expansion board provided by the embodiment of the present invention, to the general technical personnel in the field, according to the embodiment of the present invention, there are all the changes on the concrete implementation and the application scope. In summary, the content of the present specification should not be understood as a limitation of the present invention, and any changes made according to the design concept of the present invention are all within the protection scope of the present invention.

Claims

1. A back-attached type function expansion board is characterized by comprising a base material board, a back-attached body and an attaching connecting piece;

the back-attached body is a sheet body which is made of a good thermal conductor material and is provided with an end face I and an end face II, and the end face I is provided with a boss structure;

the end face I of the back attachment body is fixedly contacted with the plate face I or the plate face II of the base material plate, after the back attachment body is connected with the base material plate, the boss structure of the back attachment body is arranged in the hollow structure of the base material plate and fills the vacancy of the hollow structure, the end face III of the sticking and connecting piece is provided with a viscous material, and the end face IV of the sticking and connecting piece is fixedly contacted with the base material plate or the back attachment body;

after the base material plate, the back attachment body and the sticking and connecting piece are contacted and fixed, the front end of the boss structure on the end face I of the back attachment body is the outer facing I of the expansion plate, the end face II of the back attachment body is the outer facing II of the expansion plate,

the expansion board is fixedly adhered to the back of the first 3C electronic product through an adhesive material adhered to the end face III of the fixing piece.

2. The back-stuck functional expansion board according to claim 1, wherein the sticking fastener is in a frame-shaped structure, and the end surface IV of the sticking fastener is stuck and fixed on the outer edge of the board surface I of the base material board; the back attachment body is arranged in an inner frame cavity of the sticking and fixing piece, and the sheet body surface around the boss structure I on the end surface of the back attachment body is fixedly bonded with the plate surface I of the base material plate;

the front end of the boss structure of the back attachment body is in contact with the second 3C electronic product in an attaching mode, and the end face II of the back attachment body is in contact with the back of the first 3C electronic product in an attaching mode.

3. The back-pasting type function expansion board according to claim 1, wherein a frame-shaped groove is arranged on the end face II of the non-boss structure of the back-pasting body, the pasting and connecting piece is of a frame-shaped structure, and the end face IV of the pasting and connecting piece is fixedly bonded in the frame-shaped groove of the end face II of the back-pasting body;

the sheet ends around the boss structure I on the end face of the back attachment body are fixedly bonded with the plate surface I of the base material plate;

4. The back-attached type functional expansion board according to claim 1, wherein the sheet ends around the boss structure of the back-attached body end surface I are fixedly bonded with the board surface I of the base board, the bonding fastener is in a frame structure, and the end surface IV of the bonding fastener is fixedly bonded with the board surface II of the base board;

the front end of the boss structure of the back attachment body is in contact with the back of the first 3C electronic product in an attaching mode, and the end face II of the back attachment body is in contact with the second 3C electronic product in an attaching mode.

5. The back-mounted functional development board according to any one of claims 2 to 4, wherein a concave ring groove is provided on the substrate board or the back-mounted body, and a magnetic attraction body or a ferrous material body is provided in the concave ring groove.

6. The back-mounted function board according to claim 1, wherein a rechargeable battery, a control circuit board i and a lead are arranged in the back-mounted body, and the rechargeable battery is electrically connected with the control circuit board i;

the inner end of the wire is connected with the control circuit board I, and the outer end of the wire extends out of the base material board and is provided with a plug connected with the charging port of the first or second 3C electronic product.

7. The back-pasted function development board according to claim 1, wherein a wireless charging coil, a control circuit board II and a wire are arranged in the back-pasted body, and the wireless charging coil is electrically connected with the control circuit board II;

the inner end of the wire is connected with the wireless charging coil or the control circuit board II, and the outer end of the wire extends out of the base material plate and is provided with a plug connected with the charging port of the first or second 3C electronic product.

8. The back-pasted functional development board according to claim 2 or 3, wherein the substrate board is a solar photovoltaic cell panel, a control circuit board III including a photoelectric conversion circuit and a current inverter circuit is arranged in the back-pasted body, and the substrate board is electrically connected with the control circuit board III;

the inner end of the wire is connected with the control circuit board III, and the outer end of the wire extends out of the base material board and is provided with a plug connected with the charging port of the first or second 3C electronic product.

9. The back-mounted function expansion board according to claim 6 or 7, wherein the plug is a connected structure with a socket at the rear end or at the side edge, and when the plug is connected and fixed with the charging port externally connected with the first or second 3C electronic product, the socket is exposed outside the charging port.

10. The back-mounted function expansion board according to claim 8, wherein the plug is a connected structure with a socket at the rear end or at the side edge, and when the plug is connected and fixed with the charging port externally connected with the first or second 3C electronic product, the socket is exposed outside the charging port.

11. The back-mounted functional expansion board according to claim 1, further comprising a support frame rotatably connected with the expansion board and foldable and openable, wherein the width of the inner annular edges at two sides of the support frame is larger than that of the functional expansion board;

the support frame is rotationally connected with the function expansion board through rotating shaft frames symmetrically arranged on the edges of two sides of the surface of the base material board.