CN220208013U

CN220208013U - Optical element driving mechanism

Info

Publication number: CN220208013U
Application number: CN202321473304.0U
Authority: CN
Inventors: 请求不公布姓名; 杨洋; 陈曦; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2023-12-19
Anticipated expiration: 2033-06-09

Abstract

The utility model discloses an optical element driving mechanism, which comprises a base, a frame, a carrier, a first magnet group and a reset piece, wherein the base is used for installing an imaging chip; the frame is annular and is positioned above the base along the optical axis direction, the frame and the base are in sliding connection along the radial direction, and the radial direction is perpendicular to the optical axis direction; the carrier is movably connected with the frame and is provided with a first coil group; the first magnet group is connected with the frame and aligned with the first coil group along the radial direction, and the first magnet group and the first coil group are matched to drive the carrier to move along the optical axis direction; the polarities of the first magnet group are distributed along the direction of the optical axis, grooves are formed in the side face of the first magnet group, which faces the first coil group, the grooves are located between the two poles of the first magnet group, and the grooves extend along the radial direction; the reset member is coupled to the carrier and the frame and is operable to drive the carrier to reset.

Description

Optical element driving mechanism

Technical Field

The present utility model relates to the field of optical driving, and in particular, to an optical element driving mechanism.

Background

Many electronic devices (such as smart phones or digital cameras) have photographing or video recording functions. The use of these electronic devices is becoming more common and advancing toward a convenient and lightweight design to provide more options for the user.

In general, such a slight shake phenomenon often occurs under a hand-held condition, thereby causing a lens shift of the image pickup apparatus, so that the quality of an image captured by the image sensor is deteriorated. Therefore, the requirements for developing the anti-shake technology function are relatively large in recent years.

However, in the prior art, the optical zooming and optical anti-shake functions are mostly realized through the movement of the carrier, the movement range of the carrier is limited by weight, volume and the like, and the trouble of taking a blurred picture due to hand shake in the shooting process cannot be effectively solved. In addition, the terminal electronic devices in the market are increasingly lightweight, and thus, it is required that the optical element driving mechanism not only can be adapted to the lightweight terminal electronic devices but also has a sufficient driving force, and thus, it is required to develop an optical element driving mechanism having a lightweight and large driving force.

Disclosure of Invention

The present utility model is directed to an optical element driving mechanism to solve the above-mentioned problems.

To solve the above-mentioned technical problem, an embodiment of the present utility model provides an optical element driving mechanism, including:

the base is used for mounting the imaging chip;

the frame is annular and is positioned above the base along the optical axis direction, the frame and the base are in sliding connection along the radial direction, and the radial direction is perpendicular to the optical axis direction;

the carrier is movably connected with the frame and is provided with a first coil group;

the first magnet group is connected with the frame and aligned with the first coil group along the radial direction, and the carrier can be driven to move along the optical axis direction by matching the first magnet group with the first coil group; the polarities of the first magnet group are distributed along the optical axis direction, grooves are formed in the side face of the first magnet group, which faces the first coil group, the grooves are located between two poles of the first magnet group, and the grooves extend along the radial direction;

and the reset piece is connected with the carrier and the frame and is operable to drive the carrier to reset.

In one embodiment, the first magnet group includes a plurality of groups of first magnets, the plurality of groups of first magnets are arranged around the optical axis and at least one group of first magnets is provided with the groove;

the plurality of first coil groups are connected with the radial outer side of the carrier and are respectively arranged opposite to the plurality of first magnets along the radial direction.

In one embodiment, the plurality of groups of first magnets are respectively provided with the grooves.

In one embodiment, at least one group of the first magnets comprises a plurality of magnets arranged along the optical axis direction, the polarities of the magnets are distributed along the optical axis direction, two adjacent first magnets are arranged in a sucking way, and at least one magnet is provided with the groove.

In one embodiment, the plurality of sets of the first magnets include a plurality of the magnets, and the plurality of magnets of each set of the first magnets are each provided with the grooves.

In one embodiment, the frame comprises:

the shell comprises a top cover and an annular side frame, wherein the top end of the annular side frame is connected with the top cover and forms an accommodating space with the top cover; and

the bottom frame is connected with the bottom end of the annular side frame;

the carrier is movably positioned in the accommodating space;

the first magnets are located in the accommodating space and connected with the annular side frames.

In one embodiment, the reset element comprises:

the upper reed is elastic and is positioned between the upper side of the carrier and the top cover, and the upper reed is connected with the carrier and the shell; and

and the lower reed is elastic and is positioned between the lower part of the carrier and the bottom frame, and the lower reed is connected with the carrier and the bottom frame.

In one embodiment, the top cover is internally provided with:

the built-in circuit is electrically connected with the upper reed, and the upper reed is electrically connected with the first coil group; and

and the induction element is electrically connected with the built-in circuit.

In one embodiment, the top surface of the base is provided with at least three first ball grooves, and the first ball grooves are formed by recessing the top surface of the base;

the bottom surface of the frame is provided with at least three second ball grooves, the at least three second ball grooves and the at least three first ball grooves are correspondingly arranged along the optical axis direction, and the second ball grooves are formed by recessing the bottom surface of the frame;

the at least three balls are respectively clamped between the bottom walls of the at least three first ball grooves and the bottom walls of the at least three second ball grooves.

In one embodiment, a second coil set is arranged in the base,

the frame is further provided with a second magnet group, the second magnet group is aligned with the second coil group along the optical axis direction, the polarities of the second magnet group are distributed along the first direction, the bottom surface of the second magnet group facing the second coil group is provided with magnet grooves, the magnet grooves are located between two poles of the second magnet group and extend along the second direction, the first direction, the second direction and the optical axis direction are perpendicular to each other, and the second magnet group and the second coil group are matched to drive the base to move along the radial direction.

The utility model can reduce the weight of the first magnet group and the second magnet group and improve the driving force to the carrier and the base by changing the shapes of the first magnet group and the second magnet group, thereby enabling the optical element driving mechanism to adapt to smaller electronic equipment and ensuring enough driving force.

Drawings

Fig. 1 is an exploded view of an optical element driving mechanism of one embodiment of the present utility model.

Fig. 2 is a top view of the bottom frame of the embodiment of fig. 1.

Fig. 3 is a bottom view of the bottom frame of the embodiment of fig. 1.

Fig. 4 is a top view of the base in the embodiment of fig. 1.

Figure 5 is an assembled view of the base frame, first magnet set, carrier and upper reed of the embodiment of figure 1.

Figure 6 is an assembled view of the base frame, first magnet set, carrier and lower reed of the embodiment of figure 1.

Fig. 7 is a bottom view of the housing and the first magnet group in the embodiment of fig. 1.

Figure 8 is an assembled view of the housing, first magnet set, carrier and lower reed of the embodiment of figure 1.

Fig. 9 is a cross-sectional view of the lens driving mechanism of the embodiment shown in fig. 1 at different angles in the optical axis direction.

Fig. 10 is a schematic view of a first magnet group and a first coil group according to an embodiment of the present utility model.

Fig. 11 is a schematic view of a second magnet group and a second coil group according to an embodiment of the present utility model.

Reference numerals: 100. an optical element driving mechanism; 1. a base; 11. a substrate; 12. a circuit board; 13. a second coil group; 14. a first ball groove; 15. a gasket; 2. a frame; 21. a housing; 211. a top cover; 212. an annular side frame; 222. a built-in circuit; 22. a bottom frame; 23. a second ball groove; 24. a metal sheet; 25. a mounting groove; 3. a carrier; 31. a first coil group; 4. an upper reed; 5. a lower reed; 6. a first magnet group; 61. a groove; 7. a ball; 8. a light shielding hole; 9. a second magnet group; 91. a magnet groove; 101. magnetic field lines; 102. and a polarized region.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

The following detailed description of various embodiments of the present utility model will be provided in connection with the accompanying drawings to provide a clearer understanding of the objects, features and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present utility model, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

The utility model relates to an optical element driving mechanism 100, as shown in the figure, the optical element driving mechanism 100 comprises a base 1, a frame 2, a carrier 3, a first magnet group 6, a first coil group 31 and a reset piece, wherein the base 1 is used for installing an imaging chip and can drive the imaging chip to move along the radial direction so as to realize optical anti-shake. The frame 2 serves as a carrier 3. The carrier 3 is used for mounting the lens and can drive the lens to move along the optical axis direction. The first magnet group 6 and the first coil group 31 cooperate to drive the carrier 3 to move along the optical axis. The reset element is used for driving the carrier 3 to reset.

The base 1, the frame 2, the carrier 3 and the reset piece are distributed along the direction of the optical axis, the lens is arranged on the carrier 3, and the lens and the imaging chip are aligned along the optical axis. The carrier 3 is installed in the frame 2, and when the carrier 3 moves along the optical axis direction, the lens can be driven to focus. The frame 2 and the resetting piece are both provided with a light shielding hole 8. Under normal conditions, the light shielding hole 8 is aligned with the lens and the imaging chip along the optical axis direction and is used for avoiding the light entering the lens. When the lens shakes, the base 1 can align the imaging chip and the lens when moving along the radial direction, so as to realize the anti-shake function. An optical element driving mechanism 100 according to an embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the base 1 of the optical element driving mechanism 100 includes a base plate 11 and a circuit board 12, as shown in fig. 1 and 4, the base plate 11 is rectangular plate-shaped perpendicular to the optical axis direction, and four corners of the base plate 11 are respectively provided with a boss, the top surface of the boss is provided with first ball grooves 14, and each first ball groove 14 is respectively provided with a metal gasket 15 attached to the bottom wall of the first ball groove 14, so that the balls 7 are prevented from wearing the base plate 11. It should be understood that the boss may not be provided, and the first ball groove 14 is formed by recessing the top surface of the base plate 11. In addition, at least three first ball grooves 14 may be provided, and three first ball grooves 14 and three second ball grooves 23 of the frame 2 cooperate to facilitate more stable relative movement of the support base 1 and the frame 2, as will be described in detail below.

In addition, a sensor, which is a hall sensor, is provided inside the substrate 11, and can sense the relative positional relationship between the substrate 11 and the frame 2.

The radial direction is a direction perpendicular to the optical axis direction Z, and a plurality of radial directions may form a plane parallel to the plane in which the substrate 11 is located.

The circuit board 12 is covered to the side of the substrate 11 in the optical axis direction, which is also in the embodiment shown in fig. 1 vertical direction, near the frame 2, i.e. the circuit board 12 is covered and connected to the top surface of the substrate 11. Four corners of the circuit board 12 are respectively provided with avoidance grooves for avoiding four bosses of the substrate 11. In addition, a second coil group 13 is arranged in the circuit board 12, and the second coil group 13 can be matched with the first magnet group 6 of the frame 2 to drive the base 1 to move along the radial direction, so that the anti-shake effect is achieved. Alternatively, the second coil assembly 13 may be directly disposed on the top surface of the substrate 11, or the top surface of the substrate 11 may be provided with a cavity for accommodating the second coil assembly 13, so that the circuit board 12 is omitted.

The frame 2 is located above the base 1 in the optical axis direction and slidably connected to the base 1. Specifically, the frame 2 includes a housing 21 and a bottom frame 22, wherein the housing 21 includes a rectangular top cover 211 and an annular side frame 212, and a top end of the annular side frame 212 is connected to the top cover 211 and forms an accommodating space with the top cover 211. The bottom frame 22 is connected to the bottom end of the annular side frame 212.

The housing 21 is provided therein with a built-in circuit 222, and as shown in fig. 1, 7 and 8, the built-in circuit 222 is electrically connectable to an external power line. In addition, an inductive element is provided in the housing 21, which inductive element is electrically connected to the built-in circuit 222 for sensing the position of the carrier 3.

The bottom surface of the bottom frame 22 is provided with four second ball grooves 23, and as shown in fig. 3, the four second ball grooves 23 are formed by being depressed against the bottom surface and aligned with the four first ball grooves 14 in the optical axis direction. The four balls 7 are sandwiched between the bottom walls of the four first ball grooves 14 and the top walls of the four second ball grooves 23, respectively, so that the base 1 and the bottom frame 22 are rollably connected. It should be understood that the number of the second ball grooves 23 is also at least three, and each of the second ball grooves 23 and each of the first ball grooves 14 are provided. Furthermore, in other embodiments, the base 1 and the frame 2 may be slidably connected in the radial direction by other means, for example, the base 1 and the frame 2 are elastically connected by an elastic member, and the base 1 and the frame 2 are spaced apart, and the elastic member may support the base 1 and the frame 2 to be spaced apart and enable the base 1 to move in the radial direction relative to the frame 2, and may also drive the base 1 to return, which is not limited by the sliding connection manner of the base 1 and the frame 2.

The top wall of the second ball grooves 23 may also be provided with shims 15 or other metal sheets 24 or the like which prevent the bottom frame 22 from being worn, in the embodiment shown in the figures, the metal sheets 24 are mounted in the bottom frame 22 and exposed in the four second ball grooves 23 for preventing the balls 7 from wearing the bottom frame 22. In addition, the metal sheet 24 has several ends extending beyond the top surface of the bottom frame 22, and the side of the carrier 3 facing the bottom frame 22 is further provided with a plurality of damping rubber blocks, which may be disposed inside the carrier 3 and exposed or protrude from the bottom surface of the carrier 3. The metal sheet 24 has several ends extending from the top surface of the bottom frame 22 into several damping gel blocks, respectively, and the metal sheet 24 has a certain rigidity, so that the damper can buffer the movement of the carrier 3, and prevent the carrier 3 from striking the bottom frame 22.

The carrier 3 is movably installed in the accommodating space and located between the bottom frame 22 and the top cover 211, and the carrier 3 is connected with the frame 2 through a reset member. Specifically, the reset member includes an upper leaf 4 and a lower leaf 5, the upper leaf 4 and the lower leaf 5 having elasticity, respectively, the upper leaf 4 being located between the upper side of the carrier 3 and the top cover 211, as shown in fig. 5, the upper leaf 4 being connected to the top wall of the carrier 3 and the inner wall of the housing 21. The lower reed 5 is located between the lower side of the carrier 3 and the bottom frame 22 as shown in fig. 6 and 8, and is connected to the bottom of the carrier 3 and the bottom frame 22. The carrier 3 is provided with a first coil group 31, and the first coil group 31 is wound to the radially outer side of the carrier 3 and cooperates with the first magnet group 6 of the frame 2 to drive the carrier 3 to move in the optical axis direction. After the carrier 3 moves, the upper reed 4 and the lower reed 5 can drive the carrier 3 to reset in cooperation.

The upper reed 4 is also electrically connected to the built-in circuit 222 and the first coil group 31, and after the built-in circuit 222 of the housing 21 is energized, current can flow into the first coil group 31 via the built-in circuit 222 and the upper reed 4.

The first magnet group 6 includes four first magnets arranged around the optical axis direction and connected to the inner wall of the annular side frame 212, and the four first magnet groups 6 are disposed around the first coil group 31 and aligned with the first coil group 31 in the radial direction. Specifically, the four side portions of the annular side frame 212 are provided with mounting grooves 25, respectively, and the mounting grooves 25 are formed by recessing the inner side of the annular side frame 212 and open to the bottom frame 22, and the four first magnets are mounted in the mounting grooves 25 of the four side portions, respectively. In the embodiment shown in fig. 2, 3 and 5, the bottom frame 22 and the annular side frame 212 are respectively provided with a plurality of mounting grooves 25 aligned in the optical axis direction, and the top of each first magnet is mounted in the mounting groove 25 of the annular side frame 212 and the bottom is mounted in the mounting groove 25 of the bottom frame 22. Further, the first magnet group 6 may be connected to the base frame 22.

In addition, the polarities of the first magnets are distributed along the optical axis direction, that is, the N pole and the S pole of each first magnet are respectively located at the top and the bottom of the first magnet along the optical axis direction, that is, the two polarized regions 102 of the first magnet are distributed at the top and the bottom of the first magnet along the optical axis direction, and the magnetic field lines 101 formed by the two polarized regions 102 can pass through the first coil group 31.

The radial inner side of the first magnets is further provided with grooves 61, as shown in fig. 10, that is, the grooves 61 are formed by recessing the side surface of the first magnets facing the first coil group 31, and the grooves 61 extend in the radial direction, and the extending direction of the grooves 61 of each first magnet is the same as the length direction of the grooves 61 of the first magnets, that is, each groove 61 extends in different radial directions, and the extending direction of the grooves 61 of each first magnet is perpendicular to the optical axis direction.

Two polarized regions 102 with opposite polarities are also provided near the recess 61 of the first magnet, and the two polarized regions 102 may form magnetic field lines 101 with the polarized regions 102 at the top and bottom of the first magnet in the optical axis direction, respectively, and the magnetic field lines 101 also pass through the first coil group 31. Now, for the prior art, the recess 61 of the present utility model not only reduces the weight of the first magnet, but also increases the magnetic field line 101 of the first magnet passing through the first coil group 31, thereby increasing the lorentz force with the first coil group 31 and thus increasing the driving force to the carrier 3.

It should be understood that two, three or more first magnets may be provided as desired, and only one of the plurality of first magnets may be provided with the above-described recess 61, and preferably all of the first magnets are provided with the above-described recess 61, to reduce the weight of the first magnets as much as possible and to increase the driving force to the carrier 3.

Optionally, each first magnet may include a plurality of magnets arranged along the optical axis direction, and the polarity of each magnet is set along the optical axis direction and two adjacent first magnets are disposed in a sucking manner. Of the plurality of magnets, only one magnet may be provided with the above-described grooves 61, and each groove 61 is preferably located at a position intermediate the magnets in the optical axis direction and extends in the longitudinal direction of the magnet. Preferably, all the magnets are provided with the grooves 61 described above, respectively, and each groove 61 can increase the magnetic flux of the magnet and the first coil group 31.

In the embodiment shown in fig. 1, only one first coil group 31 is provided, and the first coil group 31 is wound to the radially outer side of the carrier 3 and is disposed opposite to the plurality of first magnets. It will be appreciated that a further plurality of first coil groups 31 may be provided, the plurality of first coil groups 31 being connected to the radially outer side of the carrier 3 and being arranged opposite the plurality of first magnets, i.e. each first coil group 31 interacting with each first magnet.

Optionally, a second magnet set 9 is further provided on the frame 2, and the second magnet set 9 and the second coil set 13 cooperate to drive the base 1 to move along the radial direction. It should be understood that other driving means may be used to drive the base 1 to move in the radial direction, such as a driving motor, etc., and the matching means of the magnets and coils is not limited.

The second magnet group 9 is aligned with the second coil group 13 along the optical axis direction Z, and the polarities of the second magnet group 9 are distributed along a first direction X, which is one direction in the radial direction, that is, perpendicular to the optical axis direction Z. In addition, the second magnet group 9 is provided with a magnet groove 91 facing the bottom surface of the second coil group 13, the magnet groove 91 being located between the poles and extending in a second direction which is another radial direction, and the second direction, the first direction X and the optical axis direction Z being perpendicular to each other.

The second magnet set 9 has polarized regions 102 of N and S poles along the first direction X, and as shown in fig. 11, the magnetic field lines 101 formed by the two polarized regions 102 may pass through the second coil set 13. And two polarized regions 102 of N pole and S pole are also provided near the magnet slot 91, the two polarized regions 102 and the two polarized regions 102 of the two sides of the second magnet group 9 along the first direction X can form two sets of magnetic field lines 101, namely, the N pole of the magnet slot 91 and the S pole of the side part of the second magnet group 9 along the first direction form one set of magnetic field lines 101, the S pole near the magnet slot 91 and the N pole of the side part of the second magnet group 9 along the first direction form the other set of magnetic field lines 101, and since the magnet slot 91 faces the second coil group 13 and is located between the two poles of the second magnet group 9 along the first direction, the two sets of magnetic field lines 101 also pass through the second coil group 13, namely, the magnet group can increase the magnetic flux of the second magnet group 9 and the second coil group 13, and improve the driving force to the base 1.

In the embodiment shown in fig. 1, the four magnets are all first magnets, or two opposite magnets are first magnets, and the other two magnets are second magnet groups 9, and the bottom ends of the two second magnet groups 9 pass through the bottom frame 22 and are close to the second coil group 13 of the circuit board 12. In other embodiments, a plurality of second magnet groups 9 may be provided on the bottom surface of the base 1, and the plurality of second magnet groups 9 may be provided so as to face the plurality of second coil groups 13. Of the plurality of second magnet groups 9, the magnet grooves 91 may be provided in part of the second magnet groups 9, or the magnet grooves 91 may be provided in all of the second magnet groups 9.

The utility model can reduce the weight of the first magnet group 6 and the second magnet group 9 and improve the driving force to the carrier 3 and the base 1 by changing the shape of the first magnet group 6 and the second magnet group 9, thereby enabling the optical element driving mechanism 100 to adapt to smaller electronic equipment and ensuring enough driving force.

While the preferred embodiments of the present utility model have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims

1. An optical element driving mechanism, comprising:

the base is used for mounting the imaging chip;

2. The optical element driving mechanism according to claim 1, wherein the first magnet group includes a plurality of groups of first magnets, the plurality of groups of first magnets are arranged around the optical axis and at least one group of the first magnets is provided with the groove;

3. The optical element driving mechanism according to claim 2, wherein a plurality of sets of the first magnets are provided with the grooves, respectively.

4. The optical element driving mechanism according to claim 2, wherein at least one set of the first magnets includes a plurality of magnets arranged in the optical axis direction, polarities of the magnets are distributed in the optical axis direction, two adjacent first magnets are disposed to attract each other, and at least one of the magnets is provided with the recess.

5. The optical element driving mechanism according to claim 4, wherein the plurality of sets of the first magnets includes a plurality of the magnets, and the plurality of the magnets of each set of the first magnets are each provided with the recess.

6. The optical element driving mechanism according to claim 2, wherein the frame includes:

the bottom frame is connected with the bottom end of the annular side frame;

the carrier is movably positioned in the accommodating space;

7. The optical element driving mechanism according to claim 6, wherein the reset member comprises:

8. The optical element driving mechanism according to claim 7, wherein the top cover is internally provided with:

and the induction element is electrically connected with the built-in circuit.

9. The optical element driving mechanism according to claim 1, wherein the top surface of the base is provided with at least three first ball grooves formed by recessing the top surface of the base;

10. The optical element driving mechanism according to claim 1, wherein the base has a second coil group,