CN214247592U - Actuator and camera module - Google Patents
Actuator and camera module Download PDFInfo
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- CN214247592U CN214247592U CN202022692312.7U CN202022692312U CN214247592U CN 214247592 U CN214247592 U CN 214247592U CN 202022692312 U CN202022692312 U CN 202022692312U CN 214247592 U CN214247592 U CN 214247592U
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- movable plate
- elastic arm
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- 239000000758 substrate Substances 0.000 claims abstract description 59
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000001737 promoting effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses an actuator and camera module, include: a substrate; the movable plate is arranged on the substrate, and at least one sliding groove is formed in the end face, facing the substrate, of the movable plate; the pushing structure is arranged on the substrate and comprises a pushing part and at least one ball, the balls are arranged on the substrate, the balls and the sliding grooves are arranged in a one-to-one correspondence mode, the balls are partially embedded in the sliding grooves, and the diameters of the balls are matched with the widths of the sliding grooves; the pushing portion is connected with the balls and used for pushing the balls to roll along the width direction of the sliding groove so as to drive the movable plate to move relative to the base plate. Use the utility model discloses, can make the fly leaf comparatively steadily promoted.
Description
Technical Field
The utility model relates to a camera device's technical field, in particular to actuator and camera module.
Background
The actuating device is a driving mechanism commonly used in the electronic field, and can be used for driving the lens unit to realize anti-shake or focusing. SMA, which is a shape memory alloy, is a driving element in an actuator. SMA is a material composed of two or more metal elements having a Shape Memory Effect (SME) by thermoelastic and martensitic phase transitions and inversions thereof. SMA can deform at a lower temperature, can contract and deform after being electrified and heated, and can recover to the shape before deformation after being cooled, thereby realizing electrically-controlled contraction. At present, the actuating structure on the actuating device usually adopts a common wire or a printed circuit for power connection, so that the actuating structure is powered on to generate power, and power in the opposite direction is provided for the vibration direction of the lens unit, thereby realizing the anti-shake function for the lens unit. The actuating device is generally composed of an actuating structure and a movable plate, wherein the actuating structure is used for pushing the movable plate to move. However, the connection portion of the current actuating structure and the movable plate is usually in surface contact, and in the process that the actuating structure pushes the movable plate, the situation of unbalanced stress occurs at different positions of the connection portion of the actuating structure and the movable plate, so that the movable plate is unstable when pushed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an actuator can make the fly leaf comparatively steadily promoted.
The utility model also provides a camera module of having above-mentioned actuator.
An actuator according to an embodiment of the first aspect of the invention comprises:
a substrate;
the movable plate is arranged on the substrate, and at least one sliding groove is formed in the end face, facing the substrate, of the movable plate;
the pushing structure is arranged on the substrate and comprises a pushing part and at least one ball, the balls are arranged on the substrate, the balls and the sliding groove are arranged in a one-to-one correspondence mode, the balls are partially embedded in the sliding groove, and the diameter of each ball is matched with the width of the sliding groove; the pushing portion is connected with the ball, and the pushing portion is used for pushing the ball to roll along the width direction of the sliding groove so as to drive the movable plate to move relative to the substrate.
According to the utility model discloses actuator, have following beneficial effect at least: the pushing structure is arranged on the substrate and comprises a pushing part and at least one ball, the balls are arranged on the substrate and are in one-to-one correspondence with the sliding grooves, the balls are partially embedded in the sliding grooves, and the diameters of the balls are matched with the widths of the sliding grooves; the pushing portion is connected with the balls and used for pushing the balls to roll along the width direction of the sliding groove so as to drive the movable plate to move relative to the base plate. Because the contact between the ball and the side wall of the sliding groove is point contact, when the pushing part pushes the ball, only one point of the ball transmits force to the side wall of the sliding groove, so that the condition that the stress is uneven due to stress at a plurality of positions can be reduced by the side wall of the sliding groove, and the pushing part is favorable for stably pushing the movable plate to move.
According to some embodiments of the utility model, promote the structure with the spout all is provided with two, two the width direction mutually perpendicular of spout, two it is used for promoting respectively to promote the structure the fly leaf is toward two the width direction motion of spout.
According to the utility model discloses a some embodiments, promote the structure with the spout all is provided with four, four the spout is in two liang of relative settings on the fly leaf, wherein, relative two that set up the width direction of spout is the same, two of adjacent setting the width direction of spout is perpendicular, four it is used for promoting respectively to promote the fly leaf toward four direction movements.
According to some embodiments of the utility model, the promotion portion includes first elastic arm, second elastic arm and SMA wire, the quantity of ball is provided with two, the one end of first elastic arm with the first power interface connection that corresponds on the base plate, the other end of first elastic arm with the one end of SMA wire is connected, the one end of second elastic arm with the second power interface connection that corresponds on the base plate, the other end of second elastic arm with the other end of SMA wire is connected, first elastic arm with the one end that the SMA wire is connected still with one of them the ball is connected, the second elastic arm with the one end that the SMA wire is connected still with another the ball is connected.
According to some embodiments of the utility model, first elastic arm, second elastic arm with the one end that the SMA wire is connected is provided with the trench respectively, two the ball respectively through the trench that corresponds with first elastic arm the second elastic arm is connected.
According to some embodiments of the present invention, the actuator further comprises a mounting plate, the mounting plate is disposed between the movable plate and the base plate, the end surface of the base plate, which is far away from the mounting plate, is connected to the movable plate, a plurality of elastic members are disposed on the mounting plate, one end of each elastic member is connected to the mounting plate, and the other end of each elastic member is connected to the base plate.
According to some embodiments of the utility model, on the fly leaf with the position that the elastic component corresponds is provided with a plurality of through-holes, the elastic component wears to establish on the through-hole.
According to some embodiments of the invention, the mounting panel with still be provided with a plurality of supporting shoes between the base plate, the mounting panel can be relative the supporting shoe slides.
According to some embodiments of the present invention, the actuator further includes two magnetic members, two of the magnetic members are disposed on the movable plate away from the end surface of the substrate, and two of the magnetic members are disposed perpendicular to each other, and two displacement sensors are disposed on the substrate at positions corresponding to the two magnetic members.
According to a second aspect of the present invention, a camera module includes the above-described actuator.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an actuator according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating the connection between the pushing structure and the movable plate according to the embodiment of the present invention;
fig. 3 is a schematic view illustrating a connection between a focusing actuator and a movable plate according to an embodiment of the present invention;
fig. 4 is a schematic view of a camera module according to an embodiment of the present invention;
FIG. 5 is a schematic view of a mounting plate and a substrate connection according to an embodiment of the present invention;
fig. 6 is a schematic view of the bottom of the movable plate according to the embodiment of the present invention;
fig. 7 is an exploded view of the movable plate, the lens unit and the bottom plate according to the embodiment of the present invention.
Reference numerals:
the actuator 100, the substrate 110, the movable plate 120, the sliding slot 121, the pushing structure 130, the first elastic arm 131, the second elastic arm 132, the SMA wire 133, the ball 134, the mounting plate 140, the elastic member 141, the supporting block 150, the magnetic member 160, the displacement sensor 170, the positioning mechanism, and the positioning mechanism,
A lens unit 200,
The focus actuator 300.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, 2, 3, 4, 5, 6 and 7, an embodiment of the present invention discloses an actuator 100, including: a substrate 110; a movable plate 120, the movable plate 120 being disposed on the substrate 110, an end surface of the movable plate 120 facing the substrate 110 being provided with at least one sliding groove 121; the pushing structure 130, the pushing structure 130 is arranged on the substrate 110, the pushing structure 130 includes a pushing part and at least one ball 134, the ball 134 is arranged on the substrate 110, the ball 134 and the chute 121 are arranged in a one-to-one correspondence, the ball 134 is partially embedded in the chute 121, and the diameter of the ball 134 is matched with the width of the chute 121; the pushing portion is connected to the balls 134, and the pushing portion is used for pushing the balls 134 to roll along the width direction of the sliding slot 121, so as to drive the movable plate 120 to move relative to the substrate 110.
The pushing structure 130 is arranged on the substrate 110, the pushing structure 130 comprises a pushing part and at least one ball 134, the ball 134 is arranged on the substrate 110, the ball 134 and the sliding groove 121 are arranged in a one-to-one correspondence manner, the ball 134 is partially embedded in the sliding groove 121, and the diameter of the ball 134 is matched with the width of the sliding groove 121; the pushing portion is connected to the balls 134, and the pushing portion is used for pushing the balls 134 to roll along the width direction of the sliding slot 121, so as to drive the movable plate 120 to move relative to the substrate 110. Since the contact between the balls 134 and the side walls of the sliding groove 121 is a point contact, when the pushing part pushes the balls 134, only one point of the balls 134 transmits force to the side walls of the sliding groove 121, so that the side walls of the sliding groove 121 may reduce uneven force due to force applied at multiple positions, thereby facilitating the pushing part to smoothly push the movable plate 120 to move.
In some embodiments of the present invention, the pushing structure 130 and the sliding groove 121 are disposed two, the width directions of the two sliding grooves 121 are perpendicular to each other, and the two pushing structures 130 are respectively used for pushing the movable plate 120 to move toward the width directions of the two sliding grooves 121. The arrangement is such that the pushing structure 130 can drive the movable plate 120 in two directions perpendicular to each other. For example, one width direction is a front-rear direction, and the other width direction is a left-right direction.
In some embodiments of the present invention, the pushing structure 130 and the sliding groove 121 are all provided with four, and four sliding grooves 121 are oppositely disposed on the movable plate 120 in two pairs, wherein the width directions of two sliding grooves 121 disposed oppositely are the same, the width directions of two sliding grooves 121 disposed adjacently are perpendicular, and the four pushing structures 130 are respectively used for pushing the movable plate 120 to move in four directions. Through the above arrangement, the four pushing structures 130 can push the movable plate 120 in four different directions, for example, one of the four pushing structures can push left, the other can push right, the other can push forward, and the last can push backward. In a specific use, the anti-shake of the lens unit 200 in four directions can be achieved.
In some embodiments of the present invention, the pushing portion includes a first elastic arm 131, a second elastic arm 132 and an SMA wire 133, the number of the balls 134 is two, one end of the first elastic arm 131 is connected to a corresponding first power supply interface on the substrate 110, the other end of the first elastic arm 131 is connected to one end of the SMA wire 133, one end of the second elastic arm 132 is connected to a corresponding second power supply interface on the substrate 110, the other end of the second elastic arm 132 is connected to the other end of the SMA wire 133, one end of the first elastic arm 131 connected to the SMA wire 133 is further connected to one of the balls 134, and one end of the second elastic arm 132 connected to the SMA wire 133 is further connected to the other ball 134. In the above arrangement, when the SMA wire 133 is electrified and contracted, the two balls 134 push the movable plate 120 to move in the same direction, so that a more stable pushing effect can be achieved. The first elastic arm 131, the second elastic arm 132 and one end of the SMA wire 133 connected to each other are respectively provided with a slot, and the two balls 134 are respectively connected to the first elastic arm 131 and the second elastic arm 132 through the corresponding slots.
In some embodiments of the present invention, the actuator 100 further includes a mounting plate 140, the mounting plate 140 is disposed between the movable plate 120 and the substrate 110, the end surface of the mounting plate 140 away from the substrate 110 is connected to the movable plate 120, the mounting plate 140 is provided with a plurality of elastic members 141, one end of each elastic member 141 is connected to the mounting plate 140, and the other end of each elastic member 141 is connected to the substrate 110. Through the above arrangement, the movable plate 120 can be stably mounted by adding the mounting plate 140, so that the movable plate 120 can still be stably connected with the base plate 110 through the mounting plate 140 during the moving process. In addition, the elastic member 141 may be connected to provide a pre-pressure between the mounting plate 140 and the substrate 110, so as to prevent the mounting plate 140 and the substrate 110 from being loosened too much and being driven smoothly. The movable plate 120 is provided with a plurality of through holes at positions corresponding to the elastic members 141, and the elastic members 141 are disposed through the through holes, so that the rigidity of the elastic members 141 in the horizontal direction can be improved, and the occupation of the plane position can be reduced.
In some embodiments of the present invention, a plurality of support blocks 150 are further disposed between the mounting plate 140 and the substrate 110, and the mounting plate 140 can slide relative to the support blocks 150. The addition of the support block 150 may allow for smoother and smoother relative movement between the mounting plate 140 and the base plate 110. The support block 150 may be a sliding bearing. The actuator 100 further includes two magnetic members 160, the two magnetic members 160 are disposed on an end surface of the movable plate 120 away from the substrate 110, the two magnetic members 160 are disposed perpendicular to each other, and two displacement sensors 170 are disposed on the substrate (110) at positions corresponding to the two magnetic members 160. The displacement sensor 170 may be a hall element, and the two magnetic members 160 and the two displacement sensors 170 constitute two sets of displacement sensing devices, which are respectively used for measuring the amount of translation of the movable plate 120 in two mutually perpendicular directions.
The embodiment of the present invention further provides a camera module, which includes the above actuator 100, and further includes a lens unit 200 and a focusing actuator 300.
An actuator 100 according to an embodiment of the present invention is described in detail below in a specific embodiment with reference to fig. 1 to 7. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.
An embodiment of the present invention discloses an actuator 100, including: a substrate 110; a movable plate 120, the movable plate 120 being disposed on the substrate 110, an end surface of the movable plate 120 facing the substrate 110 being provided with at least one sliding groove 121; the pushing structure 130, the pushing structure 130 is arranged on the substrate 110, the pushing structure 130 includes a pushing part and at least one ball 134, the ball 134 is arranged on the substrate 110, the ball 134 and the chute 121 are arranged in a one-to-one correspondence, the ball 134 is partially embedded in the chute 121, and the diameter of the ball 134 is matched with the width of the chute 121; the pushing portion is connected to the balls 134, and the pushing portion is used for pushing the balls 134 to roll along the width direction of the sliding slot 121, so as to drive the movable plate 120 to move relative to the substrate 110.
The two pushing structures 130 and the two sliding grooves 121 are arranged, the width directions of the two sliding grooves 121 are perpendicular to each other, and the two pushing structures 130 are used for pushing the movable plate 120 to move in the width directions of the two sliding grooves 121 respectively.
The four pushing structures 130 and the four sliding grooves 121 are arranged four by four, the four sliding grooves 121 are arranged on the movable plate 120 two by two in opposite directions, width directions of the two sliding grooves 121 arranged oppositely are the same, width directions of the two adjacent sliding grooves 121 arranged adjacently are perpendicular, and the four pushing structures 130 are used for pushing the movable plate 120 to move towards four directions respectively.
The pushing part comprises a first elastic arm 131, a second elastic arm 132 and an SMA wire 133, the number of the balls 134 is two, one end of the first elastic arm 131 is connected with a corresponding first power supply interface on the substrate 110, the other end of the first elastic arm 131 is connected with one end of the SMA wire 133, one end of the second elastic arm 132 is connected with a corresponding second power supply interface on the substrate 110, the other end of the second elastic arm 132 is connected with the other end of the SMA wire 133, one end of the first elastic arm 131 connected with the SMA wire 133 is also connected with one of the balls 134, and one end of the second elastic arm 132 connected with the SMA wire 133 is also connected with the other ball 134. The first elastic arm 131, the second elastic arm 132 and one end of the SMA wire 133 connected to each other are respectively provided with a slot, and the two balls 134 are respectively connected to the first elastic arm 131 and the second elastic arm 132 through the corresponding slots.
The actuator 100 further includes a mounting plate 140, the mounting plate 140 is disposed between the movable plate 120 and the substrate 110, an end surface of the mounting plate 140 away from the substrate 110 is connected to the movable plate 120, the mounting plate 140 is disposed with a plurality of elastic members 141, one end of each elastic member 141 is connected to the mounting plate 140, and the other end of each elastic member 141 is connected to the substrate 110. A plurality of through holes are formed in the movable plate 120 at positions corresponding to the elastic members 141, and the elastic members 141 are inserted into the through holes.
A plurality of support blocks 150 are further disposed between the mounting plate 140 and the base plate 110, and the mounting plate 140 is slidable with respect to the support blocks 150. The actuator 100 further includes two magnetic members 160, the two magnetic members 160 are disposed on an end surface of the movable plate 120 away from the substrate 110, the two magnetic members 160 are disposed perpendicular to each other, and two displacement sensors 170 are disposed on the substrate (110) at positions corresponding to the two magnetic members 160.
According to the actuator 100 of the embodiment of the present invention, by such an arrangement, at least some effects can be achieved, wherein the pushing structure 130 is arranged on the substrate 110, the pushing structure 130 includes a pushing portion and at least one ball 134, the ball 134 is arranged on the substrate 110, and the ball 134 and the sliding groove 121 are arranged in a one-to-one correspondence manner, the ball 134 is partially embedded in the sliding groove 121, and the diameter of the ball 134 matches with the width of the sliding groove 121; the pushing portion is connected to the balls 134, and the pushing portion is used for pushing the balls 134 to roll along the width direction of the sliding slot 121, so as to drive the movable plate 120 to move relative to the substrate 110. Since the contact between the balls 134 and the side walls of the sliding groove 121 is a point contact, when the pushing part pushes the balls 134, only one point of the balls 134 transmits force to the side walls of the sliding groove 121, so that the side walls of the sliding groove 121 may reduce uneven force due to force applied at multiple positions, thereby facilitating the pushing part to smoothly push the movable plate 120 to move.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. An actuator, comprising:
a substrate;
the movable plate is arranged on the substrate, and at least one sliding groove is formed in the end face, facing the substrate, of the movable plate;
the pushing structure is arranged on the substrate and comprises a pushing part and at least one ball, the balls are arranged on the substrate, the balls and the sliding groove are arranged in a one-to-one correspondence mode, the balls are partially embedded in the sliding groove, and the diameter of each ball is matched with the width of the sliding groove; the pushing portion is connected with the ball, and the pushing portion is used for pushing the ball to roll along the width direction of the sliding groove so as to drive the movable plate to move relative to the substrate.
2. The actuator of claim 1, wherein: the promotion structure with the spout all is provided with two, two the width direction mutually perpendicular of spout, two the promotion structure is used for promoting respectively the fly leaf is toward two the width direction motion of spout.
3. The actuator of claim 1, wherein: the pushing structures and the sliding grooves are four in number, the four sliding grooves are formed in the movable plate in a pairwise opposite mode, the two sliding grooves which are arranged oppositely are the same in width direction, the two sliding grooves which are arranged adjacently are perpendicular in width direction, and the four pushing structures are used for pushing the movable plate to move towards four directions respectively.
4. The actuator of claim 1, wherein: the promotion portion includes first elastic arm, second elastic arm and SMA line, the quantity of ball is provided with two, the one end of first elastic arm with the first power supply interface connection that corresponds on the base plate, the other end of first elastic arm with the one end of SMA line is connected, the one end of second elastic arm with the second power supply interface connection that corresponds on the base plate, the other end of second elastic arm with the other end of SMA line is connected, first elastic arm with the one end that the SMA line is connected still with one of them the ball is connected, the second elastic arm with the one end that the SMA line is connected still with another the ball is connected.
5. The actuator of claim 4, wherein: the first elastic arm, the second elastic arm and the SMA wire are connected through one end respectively provided with a slot position, and the two balls are respectively connected with the first elastic arm and the second elastic arm through the corresponding slot positions.
6. The actuator of claim 1, wherein: the actuator further comprises a mounting plate, the mounting plate is arranged between the movable plate and the base plate, the end face, far away from the base plate, of the mounting plate is connected with the movable plate, a plurality of elastic pieces are arranged on the mounting plate, one ends of the elastic pieces are connected with the mounting plate, and the other ends of the elastic pieces are connected with the base plate.
7. The actuator of claim 6, wherein: the movable plate is provided with a plurality of through holes corresponding to the elastic pieces, and the elastic pieces penetrate through the through holes.
8. The actuator of claim 6, wherein: a plurality of supporting blocks are further arranged between the mounting plate and the substrate, and the mounting plate can slide relative to the supporting blocks.
9. The actuator of claim 1, wherein: the actuator further comprises two magnetic pieces, the two magnetic pieces are arranged on the end face, far away from the base plate, of the movable plate and are perpendicular to each other, and two displacement sensors are arranged on the base plate and correspond to the two magnetic pieces.
10. A camera module, characterized by: comprising an actuator according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022692312.7U CN214247592U (en) | 2020-11-19 | 2020-11-19 | Actuator and camera module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022692312.7U CN214247592U (en) | 2020-11-19 | 2020-11-19 | Actuator and camera module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214247592U true CN214247592U (en) | 2021-09-21 |
Family
ID=77733217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022692312.7U Active CN214247592U (en) | 2020-11-19 | 2020-11-19 | Actuator and camera module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214247592U (en) |
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2020
- 2020-11-19 CN CN202022692312.7U patent/CN214247592U/en active Active
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Effective date of registration: 20240828 Address after: 215311, 2nd Floor, No. 2133 Donghe Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Henan Haoze Electronics Co.,Ltd. Kunshan Branch Country or region after: China Address before: 523062 Room 301, building 4, No. 7, Xinhe Shengfeng Road, Wanjiang street, Dongguan City, Guangdong Province Patentee before: Guangdong haideya Technology Co.,Ltd. Country or region before: China |
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