CN109765667B - Electronic device and heat drift prevention lens module thereof - Google Patents
Electronic device and heat drift prevention lens module thereof Download PDFInfo
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- CN109765667B CN109765667B CN201711098034.9A CN201711098034A CN109765667B CN 109765667 B CN109765667 B CN 109765667B CN 201711098034 A CN201711098034 A CN 201711098034A CN 109765667 B CN109765667 B CN 109765667B
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Abstract
An electronic device and a thermal drift prevention lens module thereof. The thermal drift prevention lens module includes: the heat drift prevention base body is arranged on the circuit board and is made of materials for preventing thermal expansion, and the heat drift prevention base body comprises: a housing, wherein an accommodating space is formed between the housing and the circuit board; the first clamping groove is connected with the shell; the first clamping piece is used for clamping and fixing the first fixing groove; the lens cone is used for clamping and fixing the first clamping and fixing piece; the lens is connected in the lens barrel; and the photosensitive piece is connected with the circuit board, is positioned in the accommodating space and is positioned below the lens.
Description
Technical Field
The present invention relates to a thermal drift prevention lens module, and more particularly, to a thermal drift prevention lens module capable of preventing a thermal deformation of a housing from causing a drift of a focal length of a lens.
Background
Smart phones sold in the market all have a lens module, which can be used by users to take pictures or movies at any time, thereby bringing great convenience to the users. A typical lens module is disposed on a circuit board, and the lens module has a lens holder, a lens, and a photosensitive element. The lens mount has pedestal and body, and the bottom of pedestal is connected the circuit board, and the body is connected the pedestal. The lens is disposed within the tube. The photosensitive element is positioned in the base body and connected with the circuit board, and a certain focal distance is reserved between the photosensitive element and the lens. During photographing, the lens transmits light to the photosensitive element at a fixed focus distance, so that the light can be clearly imaged on the photosensitive element.
However, if the user frequently operates various software (e.g., photographing software or game software) of the smart phone, it is easy for the circuit board and the light sensing element to emit a large amount of heat energy. The heat energy dissipated is conducted to the lens seat, so that the lens seat is heated and expanded; therefore, the lens mount with the volume changed by heat affects the distance between the lens and the photosensitive element, so that the focal length of the lens drifts (i.e. the phenomenon of thermal drift), and the quality of the captured image deteriorates.
Therefore, it is necessary to provide a lens module capable of preventing the casing from being deformed by heat to cause the shift of the focal length of the lens.
Disclosure of Invention
The invention mainly aims to provide a thermal drift prevention lens module which can prevent a shell from being deformed by heating to cause the drift of the focal length of a lens.
To achieve the above object, the present invention provides a lens module for preventing thermal drift, which is applied to a circuit board of an electronic device. The thermal drift prevention lens module comprises a thermal drift prevention base body which is arranged on the circuit board and is made of materials for preventing thermal expansion, and the thermal drift prevention base body comprises: a housing, wherein an accommodating space is formed between the housing and the circuit board; the first clamping groove is connected with the shell; the first clamping and fixing piece is used for clamping and fixing the first clamping and fixing groove; the lens cone is used for clamping and fixing the first clamping and fixing piece; the lens is connected in the lens barrel; and the photosensitive piece is connected with the circuit board, is positioned in the accommodating space and is positioned below the lens.
According to one embodiment of the invention, the housing further comprises a top wall and a plurality of side walls; the top wall is connected with the side walls, and an accommodating space is formed among the top wall, the side walls and the circuit board.
According to an embodiment of the present invention, the housing further includes an opening provided on the top wall, and the first catching groove surrounds the opening.
According to an embodiment of the present invention, the thermal drift prevention lens module further includes at least one second fastener, and the thermal drift prevention base further includes at least one second fastener groove; the at least one second clamping groove is arranged on the side wall, and the at least one second clamping groove and the at least one second clamping piece are clamped and fixed with each other.
According to an embodiment of the present invention, the first clamping piece further includes a threaded portion and a clamping ring, and the lens barrel further includes a corresponding threaded portion; the corresponding thread part is clamped and fixed by the thread part; the clamping ring clamps the first clamping groove.
According to an embodiment of the present invention, the at least one second fastening piece further includes a fastening block, and the fastening block fastens the at least one second fastening groove.
According to an embodiment of the present invention, the lens module for preventing thermal drift further includes at least one fastening rod, and the at least one second fastening member further includes a through hole; the at least one clamping rod penetrates through the circuit board and clamps the through hole of the at least one second clamping piece.
According to an embodiment of the present invention, the fastening relationship between the fastening ring and the first fastening groove, and the fastening relationship between the fastening block and the at least one second fastening groove are formed by an insert molding process.
According to an embodiment of the present invention, the fastening relationship between the fastening ring and the first fastening groove, and the fastening relationship between the fastening block and the at least one second fastening groove are formed by dispensing and fixing.
According to an embodiment of the present invention, the material of the thermal drift prevention base body is ceramic or carbon fiber.
According to an embodiment of the present invention, the first fastening member and the at least one second fastening member are made of plastic.
Another objective of the present invention is to provide an electronic device capable of preventing the lens from shifting in focal length due to the deformation of the housing caused by heat.
To achieve the above object, the electronic device of the present invention includes a circuit board and a thermal drift prevention lens module. The heat drift prevention lens module comprises a heat drift prevention seat body which is arranged on the circuit board and is made of materials for preventing thermal expansion, and the heat drift prevention seat body comprises: a housing, wherein an accommodating space is formed between the housing and the circuit board; the first clamping groove is connected with the shell; the first clamping and fixing piece is used for clamping and fixing the first clamping and fixing groove; the lens cone is used for clamping and fixing the first clamping and fixing piece; the lens is connected in the lens barrel; and the photosensitive piece is connected with the circuit board, is positioned in the accommodating space and is positioned below the lens.
According to one embodiment of the invention, the housing further comprises a top wall and a plurality of side walls; the top wall is connected with the side walls, and an accommodating space is formed among the top wall, the side walls and the circuit board.
According to an embodiment of the present invention, the housing further includes an opening provided on the top wall, and the first catching groove surrounds the opening.
According to an embodiment of the present invention, the thermal drift prevention lens module further includes at least one second fastener, and the thermal drift prevention base further includes at least one second fastener groove; the at least one second clamping groove is arranged on the side wall, and the at least one second clamping groove and the at least one second clamping piece are clamped and fixed with each other.
According to an embodiment of the present invention, the first clamping piece further includes a threaded portion and a clamping ring, and the lens barrel further includes a corresponding threaded portion; the corresponding thread part is clamped and fixed by the thread part; the clamping ring clamps the first clamping groove.
According to an embodiment of the present invention, the at least one second fastening piece further includes a fastening block, and the fastening block fastens the at least one second fastening groove.
According to an embodiment of the present invention, the lens module for preventing thermal drift further includes at least one fastening rod, and the at least one second fastening member further includes a through hole; the at least one clamping rod penetrates through the circuit board and clamps the through hole of the at least one second clamping piece.
According to an embodiment of the present invention, the fastening relationship between the fastening ring and the first fastening groove, and the fastening relationship between the fastening block and the at least one second fastening groove are formed by an insert molding process.
According to an embodiment of the present invention, the fastening relationship between the fastening ring and the first fastening groove, and the fastening relationship between the fastening block and the at least one second fastening groove are formed by dispensing and fixing.
According to an embodiment of the present invention, the material of the thermal drift prevention base body is ceramic or carbon fiber.
According to an embodiment of the present invention, the first fastening member and the at least one second fastening member are made of plastic.
The electronic device and the heat drift prevention lens module thereof can prevent the heat drift problem of focus drift caused by thermal deformation, so that a user can take clear photos or films with ease.
Drawings
FIG. 1 is a schematic view of an electronic device of one embodiment of the invention;
FIG. 2 is a schematic diagram of a thermal excursion lens module on a circuit board of one embodiment of the present invention;
FIG. 3 is a cross-sectional view of a thermal excursion lens module on a circuit board of one embodiment of the invention;
fig. 4 is an exploded perspective view of the thermal drift prevention base, the first fastener and the second fastener according to an embodiment of the invention.
Brief description of the drawings
Thermal drift prevention lens module 1 thermal drift prevention base 10
Sidewall 112 opening 113
The receiving space 114 is the first clamping groove 12
Second engaging groove 13 first engaging member 20
Screw portion 21 retainer ring 22
Second engaging member 30 engaging piece 31
Through-hole 32 lens barrel 40
Detailed Description
In order to further explain the technical contents of the present invention, preferred embodiments are enumerated and described as follows.
Referring to fig. 1 to 4, the electronic device and the thermal drift prevention lens module of the present invention are described below. FIG. 1 is a schematic view of an electronic device of one embodiment of the invention; FIG. 2 is a schematic diagram of a thermal excursion lens module on a circuit board of one embodiment of the present invention; FIG. 3 is a cross-sectional view of a thermal excursion lens module on a circuit board of one embodiment of the invention; fig. 4 is an exploded perspective view of the thermal drift prevention base, the first fastener and the second fastener according to an embodiment of the invention.
As shown in fig. 1 to 3, in an embodiment of the invention, the electronic device 100 is, for example, a smart phone, but the type is not limited thereto, and it may also be a tablet computer or other devices with a camera function. The electronic device 100 includes a circuit board 110 and a thermal drift prevention lens module 1. The circuit board 100 is used for disposing internal electronic components of the electronic device 100. The thermal drift prevention lens module 1 is a lens module having a thermal drift prevention function, which is used for photographing and can prevent a thermal drift problem that a thermal deformation causes a drift of a focal length. The thermal drift prevention lens module 1 is disposed on the circuit board 110, and the thermal drift prevention lens module 1 includes a thermal drift prevention base 10, a first fastener 20, two second fasteners 30, a lens barrel 40, a lens 50, a photosensitive member 60, and two fastening rods 70. However, the number of the second clamping member 30 and the clamping rod 70 is not limited to two, and the number thereof may be changed to one according to design requirements.
In an embodiment of the present invention, as shown in fig. 2 to 4, the thermal drift prevention housing 10 can prevent the volume change caused by heating, and the thermal drift prevention housing 10 is disposed on the circuit board 110. The thermal drift prevention seat 10 includes a housing 11, a first fastening groove 12 and two second fastening grooves 13. The thermal drift prevention seat 10 is made of a material for preventing thermal expansion, such as ceramic or carbon fiber with a thermal linear expansion coefficient close to zero, and the material with the thermal linear expansion coefficient close to zero hardly undergoes any volume change under the condition of temperature rise, so that the volume change caused by heating can be prevented; however, the material of the thermal drift prevention base 10 is not limited to ceramic or carbon fiber, and may be other materials with low thermal linear expansion coefficient. The housing 11 includes a top wall 111, four side walls 112, and an opening 113; however, the number of the sidewalls 112 is not limited to four, and may be increased or decreased according to design requirements. The top wall 111 connects the four side walls 112, and a receiving space 114 is formed between the top wall 111, the four side walls 112 and the circuit board 110, the receiving space 114 being used for receiving the photosensitive element 60. An opening 113 is disposed on the top wall 111, and the opening 113 is used for allowing external light to pass through and emit to the photosensitive member 60 in the accommodating space 114. The first engaging groove 12 is connected to the housing 11 and surrounds the opening 113, and the first engaging groove 12 is an annular groove for engaging the first engaging member 20. The two second fastening grooves 13 are respectively disposed on the two opposite side walls 112, and the two second fastening grooves 13 are respectively fastened to the two second fastening members 30. However, the number of the second engaging grooves 13 is not limited to two, and may be changed to one according to the number of the second engaging pieces 30.
In an embodiment of the present invention, the first fastening member 20 is a ring structure, and the material of the first fastening member 20 is plastic; the first fixing member 20 made of plastic material with high plasticity can be made into a fine fixing structure (such as a thread or a ring-shaped fixing piece) by a plastic injection process to fix the lens barrel 40 and the fixing groove 12. The first trim piece 20 includes a threaded portion 21 and a trim ring 22. The thread portion 21 is located on an inner side surface of the annular structure of the first fastener 20, and the thread portion 21 is used for fastening the lens barrel 40. The clamping ring 22 is located on the outer side surface of the annular structure of the first clamping member 20, the clamping ring 22 clamps the first clamping groove 12, and the clamping relationship between the clamping ring 22 and the first clamping groove 12 is formed by an insert molding process. It should be noted that the fixing relationship between the fixing ring 22 and the first fixing groove 12 is not limited to insert molding, and can be fixed by dispensing.
In an embodiment of the invention, two second fastening members 30 are used to cooperate with two fastening rods 70, so as to firmly combine the thermal-drift-prevention base 10 and the circuit board 110. The material of each second fastener 30 is plastic; the second fastening member 30 made of plastic material with high plasticity can be manufactured to have a fine fastening structure (such as a through hole or a rectangular fastening block) by a plastic injection molding process. Each of the second clamping pieces 30 includes a rectangular clamping piece 31 and a through hole 32. The clamping blocks 31 of the two second clamping pieces 30 are respectively clamped in the two rectangular second clamping grooves 13; the fastening relationship between each fastening block 31 and each second fastening groove 13 is formed by an insert molding process. The two fastening rods 70 are screws or nails, for example, and the two fastening rods 70 penetrate through the circuit board 110 and fasten the through holes 32 of the second fastening members 30, respectively. Therefore, the thermal drift prevention base 10 and the circuit board 110 can be firmly combined with each other by the fastening relationship between the fastening rod 70 and the through hole 32 and the fastening relationship between the second fastening groove 13 and the fastening block 31. It should be noted that the locking relationship between the locking block 31 and the second locking slot 13 can also be fixed by dispensing.
In one embodiment of the present invention, the lens barrel 40 is used for clamping the lens 50 and is combined with the first clamping member 20. The lens barrel 40 is in a tubular structure, and the lens barrel 40 includes a corresponding threaded portion 41, the corresponding threaded portion 41 is located on an outer side surface of the tubular structure of the lens barrel 40, and the corresponding threaded portion 41 clamps the threaded portion 21 of the first clamping member 20. The lens 50 is connected to the tubular structure of the lens barrel 40, and the lens 50 is used for allowing external light to pass through and focusing the light onto the photosensitive element 60 in the accommodating space 114. The photosensitive member 60 is connected to the circuit board 110 and is located in the accommodating space 114 and below the mirror plate 50. The photosensitive member 60 is in fixed focus distance from the optic 50. The photosensitive element 60 is used for receiving the focused light from the lens 50; by the fixed focus distance between the photosensitive member 60 and the lens 50, the focused light rays transmitted from the lens 50 are clearly imaged on the photosensitive member 60.
As shown in fig. 2 and fig. 3, the thermal drift prevention base 10 is made of materials that prevent thermal expansion and thermal linear expansion coefficients approaching zero, but these materials are usually hard, and it is difficult to make a fastening structure (such as a screw) with a delicate structure in practice, but a structure with a simple fastening groove, such as the first fastening groove 12 and the second fastening grooves 13, can still be made. The first fastener 20 and the second fastener 30 are made of plastic with high plasticity, and can be made into fine fastening structures (such as screw threads, fastening pieces, fastening blocks or through holes). The first and second clamping members 20 and 30 having a fine clamping structure may be coupled to the first and second clamping grooves 12 and 13, respectively, by an insert molding process. In this way, the combined thermal drift prevention base 10, the first fastener 20 and the two second fasteners 30 have the function of preventing thermal drift, and also have a fine fastening structure to be further combined with the lens barrel 40 and the circuit board 110.
As shown in fig. 1 to fig. 3, when the user frequently operates the electronic device 100, the circuit board 110 and the photosensitive element 60 of the electronic device 100 emit heat energy, the heat energy is first conducted to the thermal drift prevention base 10. Since the thermal drift prevention base 10 is made of a material that prevents thermal expansion and thermal linear expansion coefficients from approaching zero, the thermal drift prevention base 10 hardly undergoes any volume change. In addition, the thermal drift prevention base 10, the first fastener 20 and the two second fasteners 30 are independent elements, and the thermal drift prevention base 10, the first fastener 20 and the two second fasteners 30 are combined with each other by means of respective fastener structures; moreover, the surfaces of the first clamping groove 12 and the two second clamping grooves 13 of the thermal drift prevention seat body 10, the threaded portion 21 and the clamping ring 22 of the first clamping piece 20, and the clamping block 31 of the two second clamping pieces 30 are not completely smooth, and the surfaces of these elements still have extremely fine rugged gaps; therefore, when the first engaging groove 12 and the two second engaging grooves 13 of the thermal drift preventing base 10, the threaded portion 21 and the engaging ring 22 of the first engaging member 20, and the engaging block 31 of the two second engaging members 30 are combined with each other, the rugged surfaces of these elements will be attached to each other and a little air will be located in the rugged gap, and the air will effectively block the heat transfer; that is, the heat energy conducted to the thermal drift prevention housing 10 is difficult to be further transmitted to the first engaging member 20, the two second engaging members 30 and the lens barrel 40. Therefore, even if the first fixing member 20, the two second fixing members 30 and the lens barrel 40 are not made of a material for preventing thermal expansion, the first fixing member 20, the two second fixing members 30 and the lens barrel 40 are not affected by the heat emitted from the circuit board 110 and the photosensitive element 60. Therefore, when the circuit board 110 and the photosensitive element 60 emit heat energy, the thermal drift prevention base 10, the first fastener 20, the two second fasteners 30 and the lens barrel 40 are not affected by the heat energy, and the volume is not changed, so that the thermal drift problem of focus drift caused by thermal deformation can be prevented.
The electronic device 100 and the structure of the thermal drift prevention lens module 1 thereof of the present invention can prevent the thermal drift problem of focus drift caused by thermal deformation, so that a user can take clear photos or films with ease.
It should be noted that the above-mentioned embodiments are only examples, and are not limited to the examples. For example, without departing from the basic framework of the invention, the scope of the claims should be determined by the claims.
Claims (16)
1. The utility model provides a prevent heat drift lens module, is applied to electron device's circuit board, its characterized in that, prevent heat drift lens module includes:
the heat drift prevention base body is arranged on the circuit board and is made of materials for preventing thermal expansion, and the heat drift prevention base body comprises:
a housing, wherein an accommodating space is formed between the housing and the circuit board, the housing further comprising a plurality of side walls;
the first clamping groove is connected with the shell; and
at least one second clamping groove arranged on one side wall;
the first clamping and fixing piece is used for clamping and fixing the first clamping and fixing groove;
the second clamping piece comprises a clamping block which is used for clamping and fixing the at least one second clamping groove;
the lens cone is used for clamping and fixing the first clamping and fixing piece;
the lens is connected in the lens barrel; and
a light sensing piece connected with the circuit board and positioned in the accommodating space and below the lens,
the first clamping piece further comprises a threaded part and a clamping ring, and the lens cone further comprises a corresponding threaded part; the corresponding thread part is clamped and fixed by the thread part; the clamping ring clamps the first clamping groove.
2. The thermal drift lens module of claim 1, wherein said housing further comprises a top wall; the top wall is connected with the side walls, and the accommodating space is formed among the top wall, the side walls and the circuit board.
3. The thermal drift lens module of claim 2, wherein said housing further comprises an opening disposed in said top wall, said first catch groove surrounding said opening.
4. The thermal drift lens module of claim 1, further comprising at least one clip rod, and said at least one second clip member further comprises a through hole; the at least one clamping rod penetrates through the circuit board and clamps the through hole of the at least one second clamping piece.
5. The lens module of claim 1, wherein the snap-fit relationship between the snap ring and the first snap groove, and the snap-fit relationship between the snap block and the at least one second snap groove, are formed by an insert molding process.
6. The lens module of claim 1, wherein the engaging relationship between the engaging ring and the first engaging groove and the engaging relationship between the engaging block and the at least one second engaging groove are formed by dispensing.
7. The lens module of claim 5, wherein the thermal drift prevention base is made of ceramic or carbon fiber.
8. The lens module of claim 1, wherein the first engaging member and the at least one second engaging member are made of plastic.
9. An electronic device, comprising:
a circuit board; and
prevent heat drift camera lens module includes:
the heat drift prevention base body is arranged on the circuit board and is made of materials for preventing thermal expansion, and the heat drift prevention base body comprises:
a housing, wherein an accommodating space is formed between the housing and the circuit board, the housing further comprising a plurality of side walls;
the first clamping groove is connected with the shell; and
at least one second clamping groove arranged on one of the side walls;
the first clamping and fixing piece is used for clamping and fixing the first clamping and fixing groove;
the second clamping piece also comprises a clamping block which is used for clamping and fixing the at least one second clamping groove;
the lens cone is used for clamping and fixing the first clamping and fixing piece;
the lens is connected in the lens barrel; and
a light sensing piece connected with the circuit board and positioned in the accommodating space and below the lens,
the first clamping piece further comprises a threaded part and a clamping ring, and the lens cone further comprises a corresponding threaded part; the corresponding thread part is clamped and fixed by the thread part; the clamping ring clamps the first clamping groove.
10. The electronic device of claim 9, wherein the housing further comprises a top wall; the top wall is connected with the side walls, and the accommodating space is formed among the top wall, the side walls and the circuit board.
11. The electronic device of claim 10, wherein the housing further comprises an opening disposed in the top wall, the first catch groove surrounding the opening.
12. The electronic device of claim 9, wherein the thermal drift lens module further comprises at least one clip rod, and the at least one second clip member further comprises a through hole; the at least one clamping rod penetrates through the circuit board and clamps the through hole of the at least one second clamping piece.
13. The electronic device of claim 9, wherein the snap-fit relationship between the snap ring and the first snap groove, and the snap-fit relationship between the snap block and the at least one second snap groove, are formed by an insert molding process.
14. The electronic device of claim 9, wherein the engaging relationship between the engaging ring and the first engaging groove and the engaging relationship between the engaging block and the at least one second engaging groove are formed by dispensing.
15. The electronic device of claim 14, wherein the thermal drift prevention base is made of ceramic or carbon fiber.
16. The electronic device according to claim 15, wherein the first engaging member and the at least one second engaging member are made of plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711098034.9A CN109765667B (en) | 2017-11-09 | 2017-11-09 | Electronic device and heat drift prevention lens module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711098034.9A CN109765667B (en) | 2017-11-09 | 2017-11-09 | Electronic device and heat drift prevention lens module thereof |
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| Publication Number | Publication Date |
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| CN109765667A CN109765667A (en) | 2019-05-17 |
| CN109765667B true CN109765667B (en) | 2022-04-19 |
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| TWI405026B (en) * | 2009-07-29 | 2013-08-11 | Qisda Corp | Projector and lens thereof |
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| CN103636189A (en) * | 2011-06-29 | 2014-03-12 | Lg伊诺特有限公司 | Camera module |
| CN104142552A (en) * | 2013-05-07 | 2014-11-12 | 佳能株式会社 | Composite plastic lens and method of manufacturing the same |
| CN106559609A (en) * | 2015-09-29 | 2017-04-05 | 宁波舜宇光电信息有限公司 | Camera module and its assemble method |
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| CN109765667A (en) | 2019-05-17 |
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