CN108156782B - Through hole sealing structure and electronic equipment - Google Patents

Through hole sealing structure and electronic equipment Download PDF

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Publication number
CN108156782B
CN108156782B CN201810037121.1A CN201810037121A CN108156782B CN 108156782 B CN108156782 B CN 108156782B CN 201810037121 A CN201810037121 A CN 201810037121A CN 108156782 B CN108156782 B CN 108156782B
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sealing
hole
plastic
sealing ring
main body
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CN108156782A (en
Inventor
张云
夏厚恩
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/06Hermetically-sealed casings
    • H05K5/061Hermetically-sealed casings sealed by a gasket held between a removable cover and a body, e.g. O-ring, packing

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Casings For Electric Apparatus (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a through hole sealing structure and electronic equipment, wherein the through hole sealing structure comprises a covering piece, a main board bracket and a sealing component; the main board support comprises a plastic main body, a through hole and a connecting ring surface are arranged on the plastic main body, and the connecting ring surface is arranged around the through hole; the sealing component is formed on the plastic main body in an injection molding mode and comprises a first sealing ring, and the first sealing ring is attached to the connecting ring surface; the covering part is connected with the first sealing ring in a sealing mode through one side, deviating from the connecting ring surface, of the first sealing ring. The electronic equipment comprises the through hole sealing structure. The through hole sealing structure and the electronic equipment provided by the embodiment of the invention can effectively avoid the displacement problem of the sealing component.

Description

Through hole sealing structure and electronic equipment
Technical Field
The embodiment of the invention relates to the technical field of protection of electronic equipment, in particular to a through hole sealing structure and electronic equipment.
Background
With the increasing popularity of electronic products, some through holes are often formed in the electronic products to meet the functional requirements. Due to the uncertainty and complexity of a user using scene, liquid and dust can easily enter gaps around the through hole, and therefore functions of electronic products are reduced and even the electronic products are invalid.
In the correlation technique, the mode that usually adopts sealing member such as waterproof cushion of bonding in gap department seals, however, along with electronic product's miniaturization and frivolousization, electronic product's inside structural space is compacter and more, and waterproof cushion's the area of pasting is littleer and more, and the adhesion also is lower and more, and stability descends, leads to the user to appear in the use that waterproof cushion shifts and influences water-proof effects, causes serious problems such as sheltering from the through-hole even.
Disclosure of Invention
The embodiment of the invention provides a through hole sealing structure and electronic equipment, and aims to solve the problem of displacement of a sealing component.
The embodiment of the invention adopts the following technical scheme:
a first aspect of an embodiment of the present invention provides a through-hole sealing structure, including a cover, a main plate bracket, and a sealing member;
the main board support comprises a plastic main body, a through hole and a connecting ring surface are arranged on the plastic main body, and the connecting ring surface is arranged around the through hole;
the sealing component is formed on the plastic main body in an injection molding mode and comprises a first sealing ring, and the first sealing ring is attached to the connecting ring surface;
the covering part is connected with the first sealing ring in a sealing mode through one side, deviating from the connecting ring surface, of the first sealing ring.
Preferably, in the through-hole sealing structure, an anti-dropping hole is further formed in the plastic main body, the sealing member further includes a fixing member, the fixing member is connected to the first sealing ring, the fixing member fills the anti-dropping hole, and the anti-dropping hole is used for preventing the fixing member from being separated from the anti-dropping hole in the direction toward the covering member.
Preferably, in the through-hole sealing structure, the anti-dropping hole penetrates through the plastic main body, and the anti-dropping hole includes a thin neck, and a cross-sectional dimension of the thin neck is smaller than a cross-sectional dimension of one end of the anti-dropping hole, which is far away from the covering part.
Preferably, in the through-hole sealing structure, the anti-dropping hole is tapered uniformly from an end far away from the covering part to an end close to the covering part.
Preferably, in the through hole sealing structure, the number of the anti-dropping holes is at least two, and the anti-dropping holes are circumferentially distributed in the connecting ring surface.
Preferably, in the through-hole sealing structure, a reserved portion accommodating groove is further formed in the plastic main body and located at the outer edge of the connecting ring surface, the sealing member further comprises a pouring gate reserved portion, and the pouring gate reserved portion is connected with the outer edge of the first sealing ring and fills the reserved portion accommodating groove.
Preferably, in the through-hole sealing structure, a cold material portion accommodating groove is further formed in the plastic main body, the cold material portion accommodating groove is located at the outer edge of the connecting ring surface, the sealing member further comprises a cold material portion, and the cold material portion is connected with the outer edge of the first sealing ring and fills the cold material portion accommodating groove.
Preferably, in the through-hole sealing structure, the cold material portion accommodating groove includes a structure for preventing the cold material portion from coming off the cold material portion.
Preferably, in the through hole sealing structure, a first limiting groove is formed in the plastic main body, and the connecting ring surface is a bottom surface of the first limiting groove.
Preferably, among the aforementioned through-hole sealing structure, still include components and parts and second sealing washer, still be provided with the second spacing groove in the plastic main part, the second spacing groove with connect the anchor ring to be located respectively the both sides that the plastic main part deviates from each other, the embedding of second sealing washer the second spacing inslot, components and parts by the second sealing washer deviates from connect one side of anchor ring with second sealing washer sealing connection.
Preferably, among the aforementioned through-hole seal structure, still include components and parts, sealing member still includes second sealing washer and connecting piece, still have the gluey hole in the plastic main part, cross gluey hole and run through the plastic main part, first sealing washer with the second sealing washer is located respectively the both sides that the plastic main part deviates from each other, the connecting piece is filled cross gluey hole, and connect first sealing washer with the second sealing washer, components and parts by the second sealing washer deviates from connect one side of anchor ring with second sealing washer sealing connection.
Preferably, in the through hole sealing structure, the sealing member is made of plastic or liquid silicone.
Preferably, in the through hole sealing structure, the plastic is TPU or TPE.
A second aspect of an embodiment of the present invention provides an electronic device, including the through-hole sealing structure.
In the embodiment of the invention, the sealing component is injection molded on the plastic main body, so that the connection strength of the sealing component and the plastic main body is greatly improved, and the displacement problem of the sealing component is effectively avoided.
Drawings
Fig. 1 is an exploded view of a sealing member, a main plate bracket, and a second seal ring in a through-hole sealing structure in which the sealing member and the second seal ring are independent of each other according to an embodiment of the present invention;
FIG. 2 is an assembled cross-sectional view of the through-hole sealing structure in which the sealing member and the second seal ring are independent of each other according to the embodiment of the present invention;
fig. 3 is a detailed structural view of the sealing member when the sealing member and the second sealing ring are independent from each other according to the embodiment of the present invention;
FIG. 4 is an exploded view of a seal member and a main plate bracket of a through hole seal structure in which the seal member and a second seal ring are integrally injection molded according to an embodiment of the present invention;
FIG. 5 is an assembled cross-sectional view of a through-hole seal structure in which a seal member is integrally injection molded with a second seal ring, according to an embodiment of the present invention;
fig. 6 is a detailed structural view of the sealing member when the sealing member and the second seal ring are integrally injection-molded according to the embodiment of the present invention.
Description of reference numerals:
1-a main board support, 10-a plastic main body, 100-a through hole, 101-a first limiting groove, 102-a connecting ring surface, 103-a second limiting groove, 104-an anti-dropping hole, 105-a glue passing hole, 106-a reserved part accommodating groove, 108-a cold material part accommodating groove, 12-a stainless steel insert, 2-a sealing component, 20-a first sealing ring, 22-a fixing part, 24-a pouring gate reserved part, 26-a cold material part, 28-a second sealing ring, 29-a connecting part, 3-a covering part and 4-a component.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The embodiment of the invention discloses a through hole sealing structure which can be present in various electronic devices, such as televisions, washing machines, smart phones, tablet computers and the like. Referring to fig. 1 to 6, the through hole sealing structure includes a main board bracket 1, a sealing member 2, a cover 3, and a component 4.
Referring to fig. 1 and 4, the motherboard bracket 1 is used to connect other components, and generally includes a plastic body 10 and a stainless steel insert 12, wherein the plastic body 10 is formed by injection molding of a plastic material with a relatively high hardness, and the stainless steel insert 12 is formed by stamping of stainless steel, and is connected to the plastic body 10 or the stainless steel insert 12 of the motherboard bracket 1 respectively according to differences in positions and performances of components to be connected. During production, the plastic body 10 is formed by injection molding, the stainless steel insert 12 is also placed at a corresponding position of an injection mold during the forming process, and the stainless steel insert 12 is embedded into the plastic body 10 during the injection molding.
The plastic body 10 is provided with a through hole 100, the component 4 is arranged behind the plastic body 10 of the mainboard bracket 1, and the function of the through hole 100 is different according to the different components 4. For example, in the case of an optical device such as a camera or an infrared sensor, the main function of the through hole 100 is to transmit light, and in the case of a handset, the main function of the through hole 100 is to transmit sound waves. The covering member 3 is disposed in front of the plastic body 10.
The primary task of the sealing member 2 is to seal the gap between the cover 3 and the plastic body 10, and prevent external moisture, dust, etc. from entering the through hole 100 through the gap and contaminating the component 4. In the present embodiment, the sealing member 2 is directly molded on the plastic body 10 by injection molding. In particular, the plastic body 10 has a connecting ring surface 102, the connecting ring surface 102 is disposed around the through hole 100, and the injection molding of the sealing member 2 forms a first sealing ring 20 on the connecting ring surface 102, which is tightly attached to the connecting ring surface 102. Due to the injection molding mode, even if the area of the connecting ring surface 102 is small, the first seal ring 20 and the connecting ring surface 102 can still be tightly connected, and meanwhile, a good sealing effect is achieved.
After the first sealing ring 20 is molded on the connecting ring surface 102, the covering element 3 is connected to the first sealing ring 20 in a sealing manner from the side of the first sealing ring 20 departing from the connecting ring surface 102, so that the gap between the covering element 3 and the plastic main body 10 can be sealed. The covering member 3 in this embodiment may be a simple covering member for covering the sealing member 2, a decorative ring having a decorative function, or a member having other functions and needing to be disposed outside the sealing member 2.
In the embodiment, in order to make the sealing member 2 have good injection molding performance and sealing performance, the material of the sealing member 2 is preferably plastic, such as TPU or TPE, which has good plasticity and high resilience, and is an ideal material for the sealing member 2. In addition, liquid silicone materials may also be used.
However, no matter which material is used, the material used for the plastic body 10 is obviously different from the hard glue material. Although the sealing member 2 is directly formed on the plastic main body 10 by injection molding, the first sealing ring 20 and the connecting ring surface 102 have a relatively high connection strength, but since the two are surface-connected, the connection strength of the two materials is limited on the premise of different materials, and when the two materials are subjected to a relatively strong external force, the two materials still have a risk of tearing and separating, so that it is very significant to further improve the connection strength between the plastic main body 10 and the sealing member 2.
As shown in fig. 2 and 3, in the present embodiment, the plastic body 10 is further provided with a retaining hole 104, and at the same time, the sealing member 2 is formed with a fixing member 22 during injection molding, the fixing member 22 is formed in the retaining hole 104, so that the fixing member 22 fills the retaining hole 104, and the fixing member 22 is connected to the first sealing ring 20, and the retaining hole 104 is configured to prevent the fixing member 22 from being separated from the retaining hole 22 in a direction toward the covering member 3.
Specifically, the retaining hole 104 may adopt various structures to retain the fixing member 22, for example, the retaining hole 104 may include a narrow neck (not shown in the figure) having a cross-sectional size smaller than that of an end of the retaining hole 104 away from the cover member 3. Since the fixing member 22 is filled in the anti-dropping hole 104, the narrow neck can limit the fixing member 22, thereby preventing the fixing member 22 from dropping out of the anti-dropping hole 104 from the direction toward the cover member 3. The thin neck can be provided with only one or a plurality of thin necks distributed along a straight line, and the two ends of the thin neck can be connected through two straight surfaces with a certain included angle (such as a step-shaped structure) or can be transited through a curved surface or an inclined surface.
When the retaining hole 104 has a thin neck inside, the acting force between the fixing member 22 and the retaining hole 104 will be concentrated in the thin neck region, so it is easy to cause structural damage due to stress concentration, and if the thin neck is in a stepped structure, the corner region is also easy to be completely filled in the injection molding process, resulting in lower structural strength of the formed fixing member 22.
Therefore, the anti-slip hole 104 preferably has a structure that is uniformly tapered from the end away from the cover 3 to the end adjacent to the cover 3. The tapering may be in one dimension or in both dimensions. The retaining hole 104 formed in this way corresponds to a narrow neck as a whole, and the force acting between the fixing tool 22 and the retaining hole 104 can be uniformly dispersed on the inner wall of the retaining hole 104, and therefore, a stronger connection strength can be obtained.
In order to provide the first sealing ring 20 with a uniform connection strength, at least two retaining holes 104 may be simultaneously formed in the plastic body 10, and the retaining holes 104 are circumferentially distributed in the connecting ring surface 102, so as to improve the connection strength at each position of the first sealing ring 20.
In the present embodiment, since the seal member 2 is molded by the injection molding process, it is limited to the process itself, and the flatness of the end surface at the injection gate is difficult to ensure. In terms of sealing performance, the degree of contact between the sealing surfaces has a great influence on the sealing performance, and an uneven contact surface may adversely affect the sealing performance.
In order to avoid the influence of the end face at the injection gate on the sealing performance, the injection gate is shifted out of the first seal ring 20 in the present embodiment. Specifically, a reserved portion receiving groove 106 (see fig. 1 and 4) is formed in the plastic main body 10, the reserved portion receiving groove 106 is located at an outer edge of the connecting ring surface 102, during injection molding, an injection gate is located in the reserved portion receiving groove 106, and during injection molding, injection molding material flows into the reserved portion receiving groove 106 first and then flows onto the connecting ring surface 102. After the injection molding is completed, the sealing member 2 forms a gate reservation 24 (see fig. 3 and 6) connected to the outer edge of the first seal ring 20 in the reservation receiving groove 106, and the end surface of the injection gate is also located in the gate reservation 24, not on the sealing surface, so that the sealing effect of the first seal ring 20 is not affected.
When injection molding is adopted, the process limitation is limited, and the injection molding material which initially enters an injection molding cavity is rapidly cooled to form cold materials, and the cold materials lose plasticity due to low temperature. In the present embodiment, if the cold materials are finally left in the injection mold cavity corresponding to the first seal ring 20, the cold materials lose plasticity and cannot be molded by the injection mold cavity corresponding to the first seal ring 20, so that the structure of the molded first seal ring 20 is deviated, and the sealing effect is affected.
To avoid this problem, as shown in fig. 1 and 4, in the present embodiment, the plastic body 10 is further provided with a cold material receiving groove 108, the cold material receiving groove 108 is located at the outer edge of the connecting ring surface 102 and is usually located at the farthest distance from the injection gate, during injection, the cold material is pushed forward by the injection material subsequently entering the injection mold cavity, passes through the first sealing ring 20, and finally reaches and is stored in the cold material receiving groove 108, and after injection molding, the sealing member 2 forms a cold material portion 26 (see fig. 3 and 6) connected to the outer edge of the first sealing ring 20 inside the cold material receiving groove 108. This ensures that the cold charge does not form the first seal ring 20, thereby ensuring the structural integrity of the first seal ring 20. The cold material portion 26 is not used for sealing connection, and therefore, even if there is a deviation or defect in its own structure, there is no influence on the sealing performance of the sealing member 2.
In this embodiment, the cold material portion 26 can be used to enhance the connection strength between the sealing member 2 and the plastic body 10. For example, the cold charge receiving groove 108 may be designed to include a narrowed neck or tapered configuration that prevents the cold charge 26 from disengaging as the retaining hole 104 prevents the fastener 22.
In addition, referring to fig. 1 and 4, in order to further improve the connection strength between the plastic main body 10 and the first sealing ring 20, a first limiting groove 101 may be further disposed on the plastic main body 10, the first limiting groove 101 surrounds the through hole 100, and the connecting ring surface 102 is a bottom surface of the first limiting groove 101. Due to the existence of the first limiting groove 101, the first sealing ring 20 is attached to the bottom surface of the first limiting groove 101, i.e., the connecting ring surface 102, and also attached to the side surface of the first limiting groove 101 during injection molding, so that the connection strength between the first sealing ring 20 and the plastic body 10 is enhanced.
In this embodiment, if moisture or dust breaks through the sealing of the first sealing ring 20 and enters the through hole 100, the gap between the component 4 and the plastic body 10 needs to be sealed in order to prevent the moisture or dust from further entering other areas of the through hole sealing structure, which may cause more serious consequences.
As shown in fig. 1 to 3, a second limiting groove 103 may be disposed on the plastic main body 10, the second limiting groove 103 and the connecting ring surface 102 are respectively located at two sides of the plastic main body 10 which deviate from each other, and then a second sealing ring 28 is embedded in the second limiting groove 103, and the component 4 and one side of the second sealing ring 28 which deviates from the plastic main body 10 are hermetically connected, so as to seal a gap between the component 4 and the plastic main body 10.
Although the above method can seal the gap between the component 4 and the plastic body 10, the second sealing ring 28 needs to be separately mounted on the plastic body 10 during assembly, which results in low assembly efficiency. This embodiment makes it possible to integrate the second gasket 28 into the sealing member 2 and to mold the second gasket 28 at the same time as the molding of the sealing member 2, thereby eliminating the trouble of separately assembling the second gasket 28.
Specifically, referring to fig. 4 to 6, a glue passing hole 105 is formed in the plastic main body 10, the glue passing hole 105 penetrates through the plastic main body 10, and during injection molding, an injection molding material passes through the glue passing hole 105 and forms the first sealing ring 20 and the second sealing ring 28 on two sides of the plastic main body 10, which are away from each other, and at the same time, the injection molding material also fills the glue passing hole 105 and forms a connecting member 29 connecting the first sealing ring 20 and the second sealing ring 28. The connecting member 29 serves to connect the first seal ring 20 and the second seal ring 28 and also to reinforce the connection strength therebetween. After injection molding, the component 4 and one side of the second sealing ring 28 away from the plastic main body 10 are connected in a sealing manner, so that a gap between the component 4 and the plastic main body 10 is sealed.
When the second sealing ring 28 is injection molded, the plastic body 10 may still be provided with the second limiting groove 103, and at this time, the second limiting groove 103 may assist in forming the structure of the second sealing ring 28. When the glue passing hole 105 exists, the anti-drop hole 104 may be provided at the same time, or the anti-drop hole 104 may not be provided. Or the structure of the glue passing hole 105 is designed to have a thin neck or a tapered structure, so that the glue passing hole has the functions of gluing and preventing separation.
The through hole sealing structure and the electronic equipment provided by the embodiment of the invention can effectively avoid the displacement problem of the sealing component.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (13)

1. A through-hole sealing structure is characterized by comprising a covering piece, a main board bracket and a sealing component;
the main board support comprises a plastic main body, a through hole and a connecting ring surface are arranged on the plastic main body, and the connecting ring surface is arranged around the through hole;
the sealing component is formed on the plastic main body in an injection molding mode and comprises a first sealing ring, and the first sealing ring is attached to the connecting ring surface;
the covering part is in sealing connection with the first sealing ring from one side of the first sealing ring, which is far away from the connecting annular surface;
still be provided with cold burden portion holding tank in the plastic main part, cold burden portion holding tank is located connect the outer border of anchor ring, sealing member still includes cold burden portion, cold burden portion with the outer border of first sealing washer is connected, and fills cold burden portion holding tank, wherein, cold burden portion is formed by the injection molding material of the die cavity of moulding plastics of advancing into.
2. The through-hole sealing structure according to claim 1, wherein an anti-separation hole is further formed in the plastic body, the sealing member further includes a fixing member, the fixing member is connected to the first sealing ring, and the fixing member fills the anti-separation hole, and the anti-separation hole is configured to prevent the fixing member from separating from the anti-separation hole in a direction toward the covering member.
3. The through-hole sealing structure according to claim 2, wherein the retaining hole penetrates through the plastic body, and the retaining hole includes a narrow neck having a cross-sectional dimension smaller than a cross-sectional dimension of an end of the retaining hole away from the cover.
4. The through-hole sealing structure of claim 2, wherein the anti-run-off hole is uniformly tapered from an end away from the cover to an end adjacent to the cover.
5. The through-hole sealing structure according to claim 2, wherein the number of the retaining holes is at least two, and is distributed in the connecting ring surface along the circumferential direction.
6. The through-hole sealing structure according to any one of claims 1 to 5, wherein a reserved portion accommodating groove is further formed in the plastic main body, the reserved portion accommodating groove is located at an outer edge of the connecting ring surface, and the sealing member further includes a gate reserved portion, which is connected to the outer edge of the first sealing ring and fills the reserved portion accommodating groove.
7. The through-hole sealing structure of claim 1, wherein the cold charge portion receiving groove includes a structure for preventing the cold charge portion from coming off the cold charge portion.
8. The through-hole sealing structure according to any one of claims 1 to 5, wherein a first limiting groove is disposed on the plastic body, and the connecting ring surface is a bottom surface of the first limiting groove.
9. The through hole sealing structure according to any one of claims 1 to 5, further comprising a component and a second sealing ring, wherein a second limiting groove is further disposed on the plastic main body, the second limiting groove and the connecting ring surface are respectively located on two sides of the plastic main body, which are away from each other, the second sealing ring is embedded in the second limiting groove, and the component is hermetically connected with the second sealing ring by one side of the second sealing ring, which is away from the connecting ring surface.
10. The through hole sealing structure according to any one of claims 1 to 5, further comprising a component, wherein the sealing member further comprises a second sealing ring and a connecting member, the plastic main body is further provided with a glue passing hole, the glue passing hole penetrates through the plastic main body, the first sealing ring and the second sealing ring are respectively located on two sides of the plastic main body, which are away from each other, the connecting member fills the glue passing hole and connects the first sealing ring and the second sealing ring, and the component is hermetically connected with the second sealing ring by one side of the second sealing ring, which is away from the connecting ring surface.
11. The through-hole sealing structure according to any one of claims 1 to 5, wherein the material of the sealing member is plastic or liquid silicone.
12. The through-hole sealing structure of claim 11, wherein the plastic is TPU or TPE.
13. An electronic apparatus, characterized by comprising the through-hole sealing structure according to any one of claims 1 to 12.
CN201810037121.1A 2018-01-15 2018-01-15 Through hole sealing structure and electronic equipment Active CN108156782B (en)

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CN108156782B true CN108156782B (en) 2019-12-20

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