Drive device housing, drive device, photographic device, and electronic device

Abstract

An object of the present invention is to provide a driving device housing that can reduce the amount of magnets used without affecting the performance of the driving device. Another object of the present invention is to provide a driving device having the above housing. Another object of the present invention is to provide a photographic device including the above driving device. Yet another object of the present invention is to provide an electronic device including the above photographic device. The driving device housing for achieving the foregoing object includes at least one stepped portion at each of its corners, the stepped portion including a stepped flat wall extending in the direction of the intersection of the axes and a stepped vertical wall extending forward or backward from the stepped flat wall; wherein, the inner peripheral wall surface of the stepped vertical wall and the inner peripheral wall surface of the adjacent outer peripheral side wall form a magnet mounting portion.

Description

Technical Field

[0001] The present invention relates to a drive device housing, a drive device, a photographic device, and an electronic device. Background Art

[0002] In a photographic device of an electronic device, the movement of a lens within the electronic device is driven by the interaction between a magnetic field generated by a coil after being energized and a magnetic field generated by a magnet within a drive device, thereby achieving the purpose of zooming.

[0003] For example, a patent application with a publication number of "CN101315456A" discloses a lens drive device in a camera, which has a substantially rectangular parallelepiped-shaped housing, and triangular prism-shaped magnets are provided at four top corners of the housing.

[0004] Figure 1 Shown is the housing 9 of another existing lens drive device, and this housing 9 is in the shape of a rectangular parallelepiped. A step 92 that is recessed downward from the top surface 90 of the housing is provided at four top corners 91 of the housing, and magnets are respectively adsorbed and arranged at the top corners 91 within the housing 9, and are positioned by the bottom surface 920 of the step 92.

[0005] However, the inventors have found that the magnets provided at the top corners of the housing in the existing drive device are in the shape of triangular prisms to fit the shape of the housing, occupying a large space. When reducing the size of the magnet to reduce the external dimension of the lens drive device, demagnetization is likely to occur. Summary of the Invention

[0006] An object of the present invention is to provide a drive device housing that can reduce the amount of magnets used without affecting the performance of the drive device.

[0007] Another object of the present invention is to provide a drive device having the above housing.

[0008] Another object of the present invention is to provide a photographic device including the above drive device.

[0009] Yet another object of the present invention is to provide an electronic device including the above photographic device.

[0010] The drive device housing for achieving the foregoing object is made of a magnetic conductive material and has an axial direction. The outer shape of the housing is polygonal, including an outer peripheral side wall and a top wall connecting the front side of the outer peripheral side wall. The top wall has an opening allowing light to pass through. The housing includes at least one step portion at each of its corners, and the step portion includes:

[0011] A step flat wall extending in the direction intersecting the axis;

[0012] A step vertical wall extending forward or backward from the step flat wall;

[0013] Wherein, the inner peripheral wall surface of the stepped vertical wall and the inner peripheral wall surface of the adjacent outer peripheral side wall form a magnet mounting portion.

[0014] In one or more embodiments, the housing includes a first stepped portion and a second stepped portion at each of its corners;

[0015] The first stepped portion includes:

[0016] A first stepped vertical wall extending rearward from the outer peripheral side of the top wall, and

[0017] A first stepped flat wall extending from the rear side of the first stepped vertical wall in the direction intersecting the axis;

[0018] The second stepped portion includes:

[0019] A second stepped vertical wall extending rearward from the first stepped flat wall, and

[0020] A second stepped flat wall extending from the rear side of the second stepped vertical wall in the direction intersecting the axis;

[0021] Wherein, the inner peripheral wall surface of the second stepped vertical wall and the inner peripheral wall surface of the adjacent outer peripheral side wall form the magnet mounting portion.

[0022] In one or more embodiments, the housing includes a first stepped portion and a corner portion at each of its corners;

[0023] The first stepped portion includes:

[0024] A first stepped vertical wall extending rearward from the outer peripheral side of the top wall,

[0025] A first stepped flat wall extending from the rear side of the first stepped vertical wall in the direction intersecting the axis;

[0026] Wherein, the corner portion has the first stepped flat wall as the top wall, and the inner peripheral wall surface of the first stepped vertical wall and the inner peripheral wall surface of the adjacent outer peripheral side wall form the magnet mounting portion.

[0027] In one or more embodiments, the second stepped vertical wall extends to the rear side of the housing.

[0028] In one or more embodiments, the housing includes a corner portion at each of its corners, and the corner portion has the second stepped flat wall as the top wall.

[0029] In one or more embodiments, the housing further includes inner peripheral side walls at its respective corners. The inner peripheral side walls extend rearward from the inner peripheral side of the top wall. The inner peripheral side walls are opposite to the stepped vertical walls forming the magnet mounting portion in a direction orthogonal to the axis.

[0030] A driving device for achieving the foregoing object includes:

[0031] The housing as described above;

[0032] Magnets provided in the magnet mounting portion;

[0033] A lens carrier provided in the housing;

[0034] Elastic pieces that support the lens carrier on at least one of the front side and the rear side of the lens carrier;

[0035] A coil disposed around the outer peripheral side of the lens carrier; and

[0036] A base that supports the housing at the rear side of the housing;

[0037] Wherein, the magnet has side surfaces that are respectively in close contact with the inner peripheral wall surface of the vertical wall in the magnet mounting portion and the inner peripheral wall surface of the adjacent outer peripheral side wall.

[0038] In one or more embodiments, the magnet is trapezoidal, including a magnet outer peripheral side wall, a magnet inner peripheral side wall, and two magnet inclined side walls connecting the magnet outer peripheral side wall and the magnet inner peripheral side wall. Taking the magnet outer peripheral side wall as the top side of the trapezoid, taking the magnet inner peripheral side wall as the bottom side of the trapezoid, and the two magnet inclined side walls as the inclined sides of the trapezoid. The magnet outer peripheral side wall and the two magnet inclined side walls are respectively in close contact with the inner peripheral wall surface of the vertical wall in the magnet mounting portion and the inner peripheral wall surface of the adjacent outer peripheral side wall, and the magnet inner peripheral side wall faces the inside of the cavity surrounded by the housing.

[0039] In one or more embodiments, the outer shape of the housing is rectangular.

[0040] In one or more embodiments, the magnet inner peripheral side wall and the inner peripheral side wall of the magnet are respectively arc-shaped surfaces.

[0041] In one or more embodiments, the inner peripheral side surface of the stepped flat wall is provided as the positioning surface on the front side of the magnet.

[0042] In one or more embodiments, a front elastic piece for supporting the lens carrier is provided on the stepped flat wall.

[0043] A photographic device for achieving the foregoing object includes the driving device as described above.

[0044] An electronic device for achieving the foregoing object includes the photographic device as described above.

[0045] The beneficial effects of the present invention are as follows:

[0046] By increasing the contact surface between the magnet and the housing at the corner of the driving device housing, the magnetic field loss is reduced and the magnetic conduction effect is increased. In the case of generating the same ampere force, compared with the traditional driving device, the size of the magnet can be reduced, for example, the thickness of the magnet can be reduced, etc., so as to save materials and costs; at the same time, the intensity of the current passing through the coil can also be reduced, thereby saving energy and reducing heat generation. Under the conditions of the same current passing through the coil and the same size of the magnet, the present driving device can generate a greater ampere force compared with the traditional driving device, so as to generate a greater thrust on the coil. When the coil drives the lens carrier and the lens to move linearly, a heavier lens can be driven to meet the market demand for high-resolution lenses. At the same time, due to the provision of the first step portion and the second step portion, the top space size of the housing is further reduced to meet the market demand for electronic miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and other features, properties, and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, wherein:

[0048] Figure 1 A perspective schematic view of the housing of an existing driving device is shown;

[0049] Figure 2 An exploded schematic view of the driving device in one embodiment is shown;

[0050] Figure 3 A perspective schematic view of the driving device housing is shown;

[0051] Figure 4 A top view schematic view of the driving device in one embodiment is shown;

[0052] Figure 5 For Figure 4 The cross-sectional schematic view taken along the direction A-A in

[0053] Figure 6 A perspective schematic view of another embodiment of the housing is shown;

[0054] Figure 7 A perspective schematic view of yet another embodiment of the housing is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] The following discloses various different embodiments or examples for implementing the described subject technical solutions. To simplify the disclosure, specific examples of each element and arrangement are described below. Of course, these are merely examples and do not limit the scope of protection of this application. For example, in the subsequent description in the specification, when the first feature is formed above or on the second feature, it may include an embodiment in which the first and second features are formed by direct connection, and may also include an embodiment in which additional features are formed between the first and second features, so that the first and second features may not be directly connected. In addition, the reference numerals and / or letters may be repeated in different examples in these disclosures. This repetition is for brevity and clarity and does not itself indicate the relationship between the various embodiments and / or structures to be discussed. Further, when the first element is described as being connected or coupled to the second element, this description includes embodiments in which the first and second elements are directly connected or coupled to each other, and also includes embodiments in which one or more other intervening elements are added to indirectly connect or couple the first and second elements to each other.

[0056] It should be noted that, when used, the terms such as up, down, left, right, front, back, top, bottom, positive, negative, clockwise and counterclockwise in the following description are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative positions and / or directions between the various parts of the object.

[0057] A driving device is provided in the photographic device for driving the lens to move along the optical axis, thereby achieving the function of zooming. Figure 2 A disassembled schematic diagram of an embodiment of the driving device is shown. The driving device has a housing 1 and a base 2 for supporting the upper cover of the housing. Inside the housing 1, a front-side elastic piece 3, a rear-side elastic piece 4, a lens carrier 5, a magnet 6, and a coil 7 are respectively provided.

[0058] Figure 3 For a three-dimensional schematic diagram of the housing 1 in the driving device, please refer to Figure 3 , the outer shape of the housing 1 of the driving device is polygonal, and it has an axial direction along the optical axis direction of the driving device. The housing 1 includes an outer peripheral side wall 16 and a top wall 17 connecting the front side of the outer peripheral side wall 16. An opening 10 is provided on the top wall 17 to allow light in the photographic device to pass through.

[0059] Among them, at each corner 11 of the housing 1, there is a depression downward along the thickness direction of the housing 1, and at each corner 11, at least one stepped portion is respectively formed in a stepped shape. The stepped portion includes a stepped flat wall extending in a direction intersecting the housing axis and a stepped vertical wall extending forward or backward from the stepped flat wall. The inner peripheral wall surface of the stepped vertical wall and the adjacent outer peripheral side wall 16 form the mounting portion for the magnet.

[0060] Among them, in such asFigure 3 In the illustrated embodiment, the housing 1 has multiple steps formed by multiple downward depressions at each corner 11 in the thickness direction of the housing 1. The stepped portions include a first stepped portion 12 and a second stepped portion 13. The first stepped portion 12 includes a first stepped vertical wall 121 and a first stepped horizontal wall 122 extending from the rear side of the first stepped vertical wall 121 in a direction intersecting the axis of the housing 1. The second stepped portion 13 includes a second stepped vertical wall 131 extending rearward from the first stepped horizontal wall 122 and a second stepped horizontal wall 132 extending from the rear side of the second stepped vertical wall 131 in a direction intersecting the axis of the housing 1, thereby forming two stepped first stepped portion 12 and second stepped portion 13. Among them, it should be noted that: the first stepped vertical wall 121 and the second stepped vertical wall 131 are the aforementioned stepped vertical walls, and the first stepped horizontal wall 122 and the second stepped horizontal wall 132 are the aforementioned stepped horizontal walls. The inner peripheral wall surface of the second stepped vertical wall 131 and the inner peripheral wall surface of the outer peripheral side wall 16 adjacent thereto together form a magnet mounting portion 130 for mounting the magnet 6.

[0061] Figure 4 A top view schematic diagram of an embodiment of the driving device, Figure 5 is Figure 4 a cross-sectional schematic diagram taken along the direction A-A shown in. Please refer to Figures 2 to 5 , the lens carrier 5 is disposed within the housing 1 for supporting the lens 8. The front side elastic piece 3 is disposed between the lens carrier 5 and the housing 1, and the rear side elastic piece 4 is disposed between the lens carrier 5 and the base 2. The front side elastic piece 3 and the rear side elastic piece 4 elastically hold the lens carrier 5 within the housing 1, and at the same time allow the lens carrier 5 to move along the optical axis direction (i.e., the axis direction of the housing 1) when subjected to an external force. Among them, in an embodiment different from the illustrated one, the front side elastic piece 3 and the rear side elastic piece 4 are disposed on at least one of the front side and the rear side of the lens carrier 5, and can also play the role of elastically holding the lens carrier 5.

[0062] The coil 7 is disposed around the outer peripheral side of the lens carrier 5 and generates a loop on the outer ring surface of the lens carrier 5 after being energized. The housing 1 is made of a magnetic material, and the magnet 6 is adsorbed at the corner 11 on the inner peripheral side of the housing 1. Among them, the magnet 6 has side surfaces 60 that are respectively in close contact with the inner peripheral wall surface of the second stepped vertical wall 131 in the magnet mounting portion 130 and the inner peripheral wall surface of the adjacent outer peripheral side wall 16. When assembled, the side surfaces 60 of the magnet 6 are respectively attracted to the inner peripheral wall surface of the second stepped vertical wall 131 and the inner peripheral wall surface of the adjacent outer peripheral side wall 16, thereby completing the assembly of the magnet 6 and the housing 1.

[0063] Please compare and refer to Figure 1 , Figure 3 and Figure 5 , in Figure 1In the housing 9 of the existing driving device shown, the magnet is installed by adsorbing to the corner side surface 910 of the housing 9, while as Figure 3 and Figure 5 shown, the magnet 6 is in contact adsorption through the side surface 60 of the magnet 6 and the inner peripheral wall surface of the second step vertical wall 131 and the inner peripheral wall surface of the adjacent outer peripheral side wall 16. Since the side surface 60 of the magnet 6 is a magnetic field intensive area, directly contacting the side surface 60 of the magnet 6 with the housing 1 can prevent magnetic field loss due to gaps, thus playing a better magnetic conduction role. Since when a current is passed through the coil 7 to form a loop, the magnet 6 will generate an Ampere force on the energized coil, pushing the coil 7 to move, thereby driving the lens carrier 5 and the lens to move. Since in the magnetic circuit, the greater the magnetic flux, the greater the Ampere force generated under the same current, preventing magnetic field loss can obtain a greater magnetic flux, thereby generating a greater Ampere force. Please refer to Table 1 below for details:

[0064]

[0065] Table 1. Ampere force data for different magnet setting methods

[0066] In Table 1, the change amount of the magnet size is as Figure 2 shown. The magnet 6 is trapezoidal in shape, which is equivalent to the shape after truncating a triangle. The side length of the truncated part is L1, and L1 is equivalent to the change amount of the magnet size of the trapezoidal shape relative to the triangular shape. The second step part is equivalent to the shape after truncating a triangle from a right angle part, and L2 is the hypotenuse side length of the truncated triangle.

[0067] From the data in Table 1, when the inner shrinkage change amount L2 of the housing upper cover corner size is 1 mm and the corresponding magnet size change amount L1 is also 1 mm, when the coil 7 does not move upward, in the driving device embodiment with the inner shrinkage of the housing upper cover corner size, the generated Ampere force is 0.019788 N, while in the driving device embodiment with the non-inner-shrunk housing corner size in the traditional case, the generated Ampere force is 0.019106 N. By comparison, the Ampere force generated in the driving device embodiment with the inner shrinkage of the housing upper cover corner size is greater than that generated by the traditional driving device. Correspondingly, when the coil 7 moves upward by 0.05 - 0.25 mm respectively, the Ampere force generated in the driving device embodiment with the inner shrinkage of the housing corner size is greater than that generated by the traditional driving device.

[0068] Please continue to refer to Table 2 below:

[0069]

[0070] Table 2. Effect comparison of different magnet setting methods

[0071] In Table 2, through the formula:

[0072] Improved efficiency = (Ampere force generated by the embodiment of the driving device with the inner shrinkage of the shell corner size - Ampere force generated by the traditional driving device) / Ampere force generated by the embodiment of the driving device with the inner shrinkage of the shell corner size

[0073] The Ampere force generated by the embodiment of the driving device with the inner shrinkage of the shell corner size

[0074] Calculate the improved efficiency when the embodiment of the driving device with the inner shrinkage of the shell corner size generates Ampere force relative to the traditional driving device. It can be seen from the data in Table 2 that when the inner shrinkage change amount L1 of the shell corner size is 1 mm and the upward movement amount of the coil is between 0 - 0.25 mm, the improved efficiency value is between 2.72% and 3.57%; when the inner shrinkage change amount L2 of the shell corner size increases to 1.2 mm and the upward movement amount of the coil is between 0 - 0.25 mm, the improved efficiency value increases to between 4.40% and 5.47%; when the inner shrinkage change amount L2 of the shell corner size increases to 1.5 mm and the upward movement amount of the coil is between 0 - 0.25 mm, the improved efficiency value increases to between 10.37% and 12.50%. From the above change trend, it can be seen that the larger the inner shrinkage change amount L2 of the shell corner size, the higher the improved efficiency value under the same upward movement amount of the coil.

[0075] From the data comparison between Table 1 and Table 2 above, by providing the first step portion 12 and the second step portion 13 at the corner portion 11 of the driving device housing 1, the contact surface between the magnet 6 and the housing 1 is increased at the second step portion 13, reducing magnetic field loss and enhancing the magnetic conduction effect. Compared with the traditional driving device under the condition of generating the same Ampere force, the size of the magnet 6 can be reduced, such as reducing the thickness of the magnet 6, etc., so as to save materials and costs; at the same time, the intensity of the current passing through the coil 7 can also be reduced, thereby saving energy and reducing heat generation. Under the condition that the current passing through the coil 7 is the same and the size of the magnet 6 is the same, this driving device can generate a greater Ampere force compared with the traditional driving device, thus generating a greater thrust on the coil. When the coil 7 drives the lens carrier 5 and the lens 8 to move linearly, it can drive a heavier lens, meeting the market demand for high-resolution lenses. At the same time, due to the provision of the first step portion 12 and the second step portion 13, the top space size of the housing 1 is further reduced to meet the market demand for electronic miniaturization.

[0076] Although one embodiment of this driving device is as described above, in other embodiments of this driving device, the upper cover of the driving device housing can have more details in many aspects compared with the above embodiment, and at least a part of these details can have various variations. Some embodiments are used to illustrate at least a part of these details and variations below.

[0077] Please refer to Figure 3, the housing 1 further includes an inner peripheral side wall 14 which extends rearward from the top opening 10 on the inner peripheral side of the top wall 17. The inner peripheral side wall 14 is configured to be opposite to each second step vertical wall 131 in a direction orthogonal to the axis of the housing 1. Specifically, the inner peripheral side wall 14 is disposed outside the assembly axis corresponding to each magnet 6. Through the magnetic conduction effect of the magnet 6, the area where the inner peripheral side wall 14 is located becomes an effective magnetic field area. Through Figure 5 As can be seen, the coil 7 is disposed between the magnet 6 and the inner peripheral side wall 14. A magnetic circuit is formed between the inner peripheral side wall 14 and the surface of the magnet 6 facing the coil. When an electric current is passed through the coil 7, the magnetic circuit can generate an Ampere force on the energized coil, thereby driving the coil 7 to move.

[0078] In one embodiment of the housing 1, the housing 1 further includes a chamfer portion 18 at each of its corners 11. The chamfer portion 18 is formed by extending the second step flat wall 132 rearward of the housing. The chamfer portion 18 has the second step flat wall 132 as its top wall. Among them, the lengths of the two straight sides of the chamfer portion 18 are the amount of reduction L1 in the size of the housing corner.

[0079] Figure 6 The schematic diagram of another embodiment of the housing 1 is shown. Different from the Figure 3 embodiment shown: The corner 11a of the housing 1 may also have a chamfer portion 18a and a first step portion 12a. The first step portion 12a also includes a first step vertical wall 121a extending rearward from the outer peripheral side of the top wall 17a, and a first step flat wall 122a extending along the intersecting direction of the axis of the housing 1a from the rear side of the first step vertical wall 121a. The chamfer portion 18a has the first step flat wall 122a as its top wall. The inner peripheral wall surface of the first step vertical wall 121a and the inner peripheral wall surface of the adjacent outer peripheral side wall 16a together form a magnet mounting portion 130a for mounting the magnet 6. With such a setting, compared with the way of setting the magnet at the corner of the traditional housing, it can also play the role of increasing the contact surface between the magnet 6 and the housing 1, thereby reducing the magnetic field loss and increasing the magnetic conduction effect. In the Figure 6 embodiment shown, the inner peripheral side wall 14a in the housing 1 is configured to be opposite to the first step vertical wall 121a in a direction orthogonal to the axis of the housing 1.

[0080] Figure 7 The schematic diagram of another embodiment of the housing 1 is shown. In this embodiment, different from the Figure 3 embodiment shown: At the corner 11b of the housing 1, the second step vertical wall 131b may directly extend to the rear side of the housing 1, so as to Figure 3The embodiment shown has fewer corner portions 18 compared thereto. At this time, the inner peripheral wall surface of the second stepped vertical wall 131b and the inner peripheral wall surface of the outer peripheral side wall 16b adjacent thereto form a magnet mounting portion 130b, and the first stepped flat wall 122b can position the magnet 6 during installation. Such an arrangement can also serve to increase the contact surface between the magnet 6 and the housing 1. In the case of Figure 7 shown in the embodiment, the inner peripheral side wall 14b in the housing 1 is configured to face the second stepped vertical wall 131b in a direction orthogonal to the axis of the housing 1.

[0081] Please refer to Figure 2 and Figure 3 , in one embodiment, the magnet 6 is trapezoidal as shown, and the side surface 60 of the magnet 6 further includes a magnet outer peripheral side wall 601, a magnet inner peripheral side wall 602, and two magnet inclined side walls 603 connecting the magnet outer peripheral side wall 601 and the magnet inner peripheral side wall 602. Among them, the magnet outer peripheral side wall 601 forms the top side of the trapezoid, the magnet inner peripheral side wall 602 forms the bottom side of the trapezoid, and the two magnet inclined side walls 603 form the two hypotenuses of the trapezoid. The magnet outer peripheral side wall 601, the magnet inner peripheral side wall 602, and the connection of the magnet outer peripheral side wall 601 are respectively in close contact with the inner peripheral wall surface of the second stepped vertical wall 131 in the magnet mounting portion 130 and the inner peripheral wall surface of the adjacent outer peripheral side wall 16 in the assembled state. At the same time, the magnet inner peripheral side wall 602 is arranged facing the inside of the cavity surrounded by the housing 1, so that a magnetic circuit is formed between the magnet inner peripheral side wall 602 and the inner peripheral side wall 14. Similarly, in Figure 6 shown in the embodiment, the magnet outer peripheral side wall 601, the magnet inner peripheral side wall 602, and the connection of the magnet outer peripheral side wall 601 are respectively in close contact with the inner peripheral wall surface of the first stepped vertical wall 121a in the magnet mounting portion 130a and the inner peripheral wall surface of the adjacent outer peripheral side wall 16a in the assembled state. In Figure 7 shown in the embodiment, the magnet outer peripheral side wall 601, the magnet inner peripheral side wall 602, and the connection of the magnet outer peripheral side wall 601 are respectively in close contact with the inner peripheral wall surface of the second stepped vertical wall 131b in the magnet mounting portion 130b and the inner peripheral wall surface of the adjacent outer peripheral side wall 16b in the assembled state.

[0082] In one embodiment, the housing 1 is rectangular as Figure 3 shown, and the magnets 6 are respectively arranged at the four corner portions 11 of the housing 1. In some other embodiments different from those shown in the figure, the housing 1 may also be in the shape of other suitable polygons.

[0083] Please continue to refer to Figure 3, in one embodiment, the inner peripheral side wall 602 of the magnet 6 and the inner peripheral side wall 14 are respectively arc-shaped surfaces. Since the arc-shaped surfaces face the coil 7, the arc-shaped surfaces can make the magnet fit the coil better and reduce the distance between the magnet 6 and the coil 7, thereby further reducing the magnetic field loss.

[0084] Please continue to refer to Figure 3 , in one embodiment, the upper surface of the magnet 6 is restricted by the first step flat wall 122 of the first step portion 12, and the first step flat wall 122 plays a role in positioning the front side of the magnet 6.

[0085] Please refer to the details in Figure 5 , in one embodiment, the front side elastic piece 3 is arranged between the first step flat wall 122 of the first step portion 12 and the lens carrier 5, and the first step flat wall 122 is configured to support the front side elastic piece 3.

[0086] In one embodiment of the driving device, the driving device is arranged in the photographic device, and the lens 8 is the lens of the photographic device.

[0087] In one embodiment of the photographic device, the aforementioned photographic device is arranged in an electronic device such as a laptop computer or a mobile phone.

[0088] Although the present invention is disclosed above with preferred embodiments, it is not used to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and decoration made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A driving device housing, made of a magnetic conductive material, having an axial direction, the outer shape of the housing being polygonal, including an outer peripheral side wall and a top wall connecting the front side of the outer peripheral side wall, the top wall having an opening allowing light to pass through, Characterized in that, the housing includes at least one stepped portion at each of its corners, and the stepped portion includes: a stepped flat wall extending in the direction intersecting the axis; a stepped vertical wall extending forward or backward from the stepped flat wall; wherein, the inner peripheral wall surface of the stepped vertical wall and the inner peripheral wall surface of the adjacent outer peripheral side wall form a magnet mounting portion; the housing includes a first stepped portion and a second stepped portion at each of its corners; the first stepped portion includes: a first stepped vertical wall extending backward from the outer peripheral side of the top wall, and a first stepped flat wall extending in the direction intersecting the axis from the rear side of the first stepped vertical wall; the second stepped portion includes: a second stepped vertical wall extending backward from the first stepped flat wall, wherein, the inner peripheral wall surface of the second stepped vertical wall and the inner peripheral wall surface of the adjacent outer peripheral side wall form the magnet mounting portion.

2. The driving device housing according to claim 1, Characterized in that, the second stepped portion further includes: a second stepped flat wall extending in the direction intersecting the axis from the rear side of the second stepped vertical wall.

3. The driving device housing according to claim 1, Characterized in that: the second stepped vertical wall extends to the rear side of the housing.

4. The driving device housing according to claim 1, Characterized in that: the housing includes a corner portion at each of its corners, and the corner portion has the second stepped flat wall as the top wall.

5. The driving device housing according to any one of claims 1 to 4, Characterized in that, the housing further includes an inner peripheral side wall at each of its corners, the inner peripheral side wall extending backward from the inner peripheral side of the top wall, and the inner peripheral side wall and the stepped vertical wall forming the magnet mounting portion are opposite to each other in a direction orthogonal to the axis.

6. A driving device, Characterized in that, including: a housing, including an outer peripheral side wall and a top wall connecting the front side of the outer peripheral side wall, having an axial direction, the housing including a first stepped portion and a corner portion at each of its corners; the first stepped portion includes: a first stepped vertical wall extending backward from the outer peripheral side of the top wall, a first stepped flat wall extending in the direction intersecting the axis from the rear side of the first stepped vertical wall; wherein, the corner portion has the first stepped flat wall as the top wall, and the inner peripheral wall surface of the first stepped vertical wall and the inner peripheral wall surface of the adjacent outer peripheral side wall form a magnet mounting portion; a magnet arranged in the magnet mounting portion; a lens carrier arranged in the housing; a spring piece supporting the lens carrier on at least one of the front side and the rear side of the lens carrier; a coil arranged around the outer peripheral side of the lens carrier; and a base supporting the housing at the rear side of the housing; wherein, the magnet has side surfaces closely attached to the inner peripheral wall surface of the vertical wall in the magnet mounting portion and the inner peripheral wall surface of the adjacent outer peripheral side wall respectively.

7. The driving device according to claim 6, Characterized in that, The magnet is trapezoidal, including an outer peripheral side wall of the magnet, an inner peripheral side wall of the magnet, and two inclined side walls of the magnet connecting the outer peripheral side wall of the magnet and the inner peripheral side wall of the magnet. Taking the outer peripheral side wall of the magnet as the top side of the trapezoid, taking the inner peripheral side wall of the magnet as the bottom side of the trapezoid, and the two inclined side walls of the magnet as the hypotenuse of the trapezoid. The outer peripheral side wall of the magnet, the two inclined side walls of the magnet are respectively in close contact with the inner peripheral wall surface of the vertical wall in the magnet mounting part and the inner peripheral wall surface of the adjacent outer peripheral side wall. The inner peripheral side wall of the magnet is arranged towards the inside of the cavity surrounded by the housing.

8. The driving device according to claim 6, characterized in that, the outer shape of the housing is rectangular.

9. The driving device according to claim 7, characterized in that, the housing further includes an inner peripheral side wall, and the inner peripheral side wall of the magnet and the inner peripheral side wall are respectively arc-shaped surfaces.

10. The driving device according to claim 6, characterized in that, the inner peripheral side surface of the stepped flat wall is set as the positioning surface on the front side of the magnet.

11. The driving device according to claim 6, characterized in that, a front elastic piece for supporting the lens carrier is provided on the stepped flat wall.

12. A photographic device, characterized in that, comprises the driving device according to any one of claims 6 to 11.

13. An electronic device, characterized in that, comprises the photographic device according to claim 12.

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