CN213213301U - Voice coil motor - Google Patents
Voice coil motor Download PDFInfo
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- CN213213301U CN213213301U CN202022391117.0U CN202022391117U CN213213301U CN 213213301 U CN213213301 U CN 213213301U CN 202022391117 U CN202022391117 U CN 202022391117U CN 213213301 U CN213213301 U CN 213213301U
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- position sensor
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- facing
- voice coil
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Abstract
The utility model relates to the technical field of cameras, and discloses a voice coil motor, which comprises a circuit board and a position sensor; the circuit board comprises a board body, a pin connected with the board body and a welding pin extending from the pin; the position sensor is arranged on one side of the circuit board and is provided with a solder ball, and the solder ball is welded with the solder leg; wherein the surface of the solder foot facing the position sensor protrudes from the surface of the pin facing the position sensor, and/or the adhesiveness of the surface of the solder foot facing the position sensor is greater than that of the surface of the pin facing the position sensor. Based on above-mentioned structure, when the mounted position sensor, because the leg is not on the coplanar and/or the adhesion nature of the two is different towards position sensor's surface and pin towards position sensor's surface, consequently molten soldering tin can concentrate on the leg and distribute evenly, and then has guaranteed position sensor and the good contact effect of circuit board, has improved voice coil motor's yields effectively.
Description
Technical Field
The utility model relates to a camera technical field especially relates to a voice coil motor.
Background
A Voice Coil driver (VCA), also called a Voice Coil Motor (VCM), is a device for converting electrical energy into mechanical energy, and is mainly applied to a camera module. As the application of voice coil motors is becoming more common, the installation requirements of position sensors thereof are becoming higher and higher.
Surface Mount Technology (SMT) is the most popular Technology and process in the electronic assembly industry, and is a Circuit connection Technology in which a leadless or short-lead Surface-mounted device is mounted on the Surface of a Printed Circuit Board (PCB) or other substrate and then soldered or assembled by means of reflow soldering or dip soldering. Position sensor adopts SMT to realize the installation promptly, nevertheless discovers in the installation in the past, because the tin volume is too big and melting soldering tin flow is irregular, and the tin volume distributes unevenly, easily leads to position sensor and circuit board contact failure, influences voice coil motor's yields.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a voice coil motor that the contact is good, easily equipment, yields are high.
In order to achieve the above object, the present invention provides a voice coil motor, which includes:
the circuit board comprises a board body, a pin connected with the board body and a welding pin extending out of the pin;
the position sensor is arranged on one side of the circuit board and is provided with a solder ball, and the solder ball is welded with the solder leg;
wherein the surface of the solder foot facing the position sensor protrudes from the surface of the pin facing the position sensor; and/or
The adhesion of the solder foot to the surface of the position sensor is greater than the adhesion of the foot to the surface of the position sensor.
In some embodiments of the present application, the solder tail is deflected from the side of the pin where the position sensor is located, so that a surface of the solder tail facing the position sensor protrudes from a surface of the pin facing the position sensor.
In some embodiments of the present application, the solder tail is removed towards the surface layer metal of the position sensor, such that the roughness of the surface of the solder tail towards the position sensor is greater than the roughness of the surface of the pin towards the position sensor.
In some embodiments of the present application, the surface metal of the fillet facing the position sensor is removed by laser.
In some embodiments of the present application, a surface of the solder tail facing the position sensor is plated with a nickel layer.
In some embodiments of the present application, one end of the pin is connected to the board body, and the solder leg is disposed at one end of the pin away from the board body.
In some embodiments of the present application, the solder balls, the solder legs, and the pins are equal in number and correspond to one another.
In some embodiments of the present application, the voice coil motor further comprises a base, and the circuit board is disposed on the base.
In some embodiments of the present application, a housing connected to the base is disposed outside the circuit board, the housing has an opening exposing the solder leg, and the position sensor is disposed in the opening.
In some embodiments of the present application, the solder balls are coated with a flux.
The utility model provides a voice coil motor, compared with the prior art, its beneficial effect lies in:
the utility model provides a voice coil motor, which comprises a circuit board and a position sensor; the circuit board comprises a board body, a pin connected with the board body and a welding pin extending from the pin; the position sensor is arranged on one side of the circuit board and is provided with a solder ball, and the solder ball is welded with the solder leg; wherein the surface of the solder foot facing the position sensor protrudes from the surface of the pin facing the position sensor, and/or the adhesiveness of the surface of the solder foot facing the position sensor is greater than that of the surface of the pin facing the position sensor. Based on above-mentioned structure, when the mounted position sensor, because the leg is not on the coplanar and/or the adhesion nature of the two is different towards position sensor's surface and pin towards position sensor's surface, consequently molten soldering tin can concentrate on the leg and distribute evenly, and then has guaranteed position sensor and the good contact effect of circuit board, has improved voice coil motor's yields effectively.
Drawings
Fig. 1 is a schematic partial structural view of a voice coil motor according to an embodiment of the present invention;
fig. 2 is an assembly diagram of the circuit board and the base according to the embodiment of the present invention;
FIG. 3 is an enlarged view of area I of FIG. 2;
fig. 4 is an assembly diagram of a position sensor and a circuit board according to an embodiment of the present invention;
fig. 5 is an enlarged view of region II in fig. 4.
In the figure: 1. a circuit board; 11. a pin; 12. welding feet; 2. a position sensor; 3. a base; 4. a housing; 41. and (4) opening.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
It should be understood that the terms "first" and "second" are used for descriptive purposes only to distinguish one type of technical feature from another, and are not to be construed as indicating or implying any relative importance, order or quantity of such technical features, i.e., a "first" technical feature may be referred to as a "second" technical feature, a "second" technical feature may also be referred to as a "first" technical feature, and a technical feature defined as "first" or "second" may explicitly or implicitly include one or more such technical features. In addition, unless otherwise specified, "a plurality" means two or more.
It is emphasized that, in the description of the present application, the terms "mounted", "connected" and "connected", unless expressly specified or limited otherwise, are to be construed broadly, e.g. as meaning fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example one
Referring to fig. 1 to 5, an embodiment of the present invention provides a voice coil motor, which mainly includes a circuit board 1 and a position sensor 2; the circuit board 1 comprises a board body, a pin 11 connected with the board body and a welding pin 12 extending from the pin 11; the position sensor 2 is preferably a hall sensor which is arranged on one side of the circuit board 1 and is provided with a solder ball, and the solder ball is welded with the solder leg 12; the surface of the solder leg 12 facing the position sensor 2 protrudes from the surface of the pin 11 facing the position sensor 2.
Based on the above structure, when the position sensor 2 is installed, because the surface of the solder leg 12 facing the position sensor 2 and the surface of the pin 11 facing the position sensor 2 are not on the same plane, the solder ball is not in contact with the pin 11, and the melted solder can be concentrated on the solder leg 12 and uniformly distributed, thereby ensuring the good contact effect of the position sensor 2 and the circuit board 1, and effectively improving the yield of the voice coil motor.
Specifically, as shown in fig. 3 and 5, one end of the pin 11 is connected to the board body, and the solder leg 12 is disposed at one end of the pin 11 away from the board body; the solder leg 12 is deflected from the pin 11 to the side where the position sensor 2 is located, so that the surface of the solder leg 12 facing the position sensor 2 protrudes from the surface of the pin 11 facing the position sensor 2; the solder balls are provided in plural numbers, the solder pins 12 are in equal number and are soldered in one-to-one correspondence, and the pins 11 are in equal number and are provided in one-to-one correspondence with the solder pins 12.
Optionally, in this embodiment, the solder balls are coated with flux in order to aid and facilitate the soldering process, remove oxides, and reduce the surface tension of the solder fillets 12.
Referring to fig. 1, fig. 2 and fig. 4, the voice coil motor provided by the embodiment of the present invention further includes a base 3, the circuit board 1 is disposed on the base 3, specifically, the outer portion of the circuit board 1 is provided with a housing 4 connected to the base 3, the housing 4 has an opening 41 exposing the solder leg 12, and the position sensor 2 is disposed in the opening 41. Thus, the position sensor 2 and the base 3 are processed into an integral part (All In One Bottom, AIOB for short), which is more beneficial for application.
Example two
The difference between this embodiment and the first embodiment is that the surface of the solder leg 12 facing the position sensor 2 is flush with the surface of the pin 11 facing the position sensor 2, but the adhesion of the former is greater than that of the latter. Based on this, when installing position sensor 2, the molten soldering tin can not flow at will, can concentrate on leg 12 and distribute evenly, and then has guaranteed position sensor 2 and the good contact effect of circuit board 1 equally, has improved voice coil motor's yields effectively.
Specifically, in this embodiment, the surface layer metal of the solder fillet 12 facing the position sensor 2 is removed in a laser manner, so that the roughness of the surface of the solder fillet 12 facing the position sensor 2 is greater than the roughness of the surface of the pin 11 facing the position sensor 2, and the larger the roughness, the larger the adhesiveness is. Optionally, the bonding properties can also be enhanced by plating the surface of the solder tail 12 facing the position sensor 2 with a layer of metal, such as nickel.
It should be understood that the present invention provides a voice coil motor that can adopt the structure of the above two embodiments, that is, the surface of the solder leg 12 facing the position sensor 2 protrudes from the surface of the pin 11 facing the position sensor 2, and at the same time, the adhesion of the surface of the solder leg 12 facing the position sensor 2 is greater than that of the pin 11 facing the position sensor 2.
To sum up, the utility model provides a voice coil motor, which comprises a circuit board 1 and a position sensor 2; the surface of the solder leg 12 of the circuit board 1 facing the position sensor 2 protrudes beyond the surface of the pin 11 of the circuit board 1 facing the position sensor 2, and/or the adhesiveness of the surface of the solder leg 12 facing the position sensor 2 is greater than the adhesiveness of the surface of the pin 11 facing the position sensor 2. Compared with the prior art, the voice coil motor has the advantages of good contact, easiness in assembly, high yield and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A voice coil motor, comprising:
the circuit board comprises a board body, a pin connected with the board body and a welding pin extending out of the pin;
the position sensor is arranged on one side of the circuit board and is provided with a solder ball, and the solder ball is welded with the solder leg;
wherein the surface of the solder foot facing the position sensor protrudes from the surface of the pin facing the position sensor; and/or
The adhesion of the solder foot to the surface of the position sensor is greater than the adhesion of the foot to the surface of the position sensor.
2. A voice coil motor as claimed in claim 1, wherein:
the solder leg is deflected from the pin to one side where the position sensor is located, so that the surface of the solder leg facing the position sensor protrudes from the surface of the pin facing the position sensor.
3. A voice coil motor as claimed in claim 1, wherein:
the surface layer metal of the welding foot facing the position sensor is removed, so that the roughness of the surface of the welding foot facing the position sensor is larger than that of the surface of the pin facing the position sensor.
4. A voice coil motor as claimed in claim 3, wherein:
and the surface layer metal of the welding leg facing the position sensor is removed in a laser mode.
5. A voice coil motor as claimed in claim 1, wherein:
the surface of the welding leg facing the position sensor is plated with a nickel layer.
6. A voice coil motor as claimed in claim 1, wherein:
one end of the pin is connected with the board body, and the welding pin is arranged at one end of the pin, which is far away from the board body.
7. A voice coil motor as claimed in claim 1, wherein:
the solder balls, the solder legs and the pins are equal in number and correspond to one another.
8. A voice coil motor as claimed in claim 1, wherein:
still include the base, the circuit board set up in on the base.
9. The voice coil motor of claim 8, wherein:
a shell connected with the base is arranged outside the circuit board, the shell is provided with an opening exposing the welding leg, and the position sensor is arranged in the opening.
10. A voice coil motor as claimed in any one of claims 1 to 9, wherein:
and the solder balls are coated with soldering flux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022391117.0U CN213213301U (en) | 2020-10-23 | 2020-10-23 | Voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022391117.0U CN213213301U (en) | 2020-10-23 | 2020-10-23 | Voice coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213213301U true CN213213301U (en) | 2021-05-14 |
Family
ID=75826726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022391117.0U Active CN213213301U (en) | 2020-10-23 | 2020-10-23 | Voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213213301U (en) |
-
2020
- 2020-10-23 CN CN202022391117.0U patent/CN213213301U/en active Active
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