Driving device and camera module

Abstract

The utility model relates to the technical field of camera shooting equipment, and discloses a driving device and a camera shooting module. The driving device comprises a base, a shell, a carrier, a driving element, a housing and a damping part, the shell is connected with the base, and a containing space is formed between the shell and the base; the carrier is arranged in the accommodating space; the driving element is connected between the carrier and the base and is configured to drive the carrier to move in a first direction relative to the base; the housing is arranged on the carrier and is provided with an open structure for avoiding the driving element; the damping piece is connected with the housing and comprises a first damping part and a second damping part, the first damping part protrudes out of the top of the housing, and the second damping part protrudes out of the side portion of the housing. The camera module comprises a lens assembly and a driving device. The driving device can absorb noise generated in the moving process of the carrier, reduce impact force generated by vibration and improve the damping and noise reduction performance of the driving device.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera equipment technical field especially, relate to a drive device and camera module. BACKGROUND

[0002] In the camera module, usually fix optical lens on the carrier of drive device, when drive device is energized, drive element (such as voice coil motor etc.) will drive carrier and lens linear motion along the optical axis direction of lens, thereby realize automatic focusing and focusing function.

[0003] In prior art, to reduce the influence of external impact on drive device, usually set limit structure on carrier, limit structure is between carrier and the shell of drive device, when shell is impacted by external (such as fall), limit structure can reduce the collision of shell to carrier. However, the existing scheme cannot reduce the noise generated by carrier movement and impact during the working process of drive device, that is, the shock absorption and noise reduction capacity of the existing limit structure is poor, resulting in that drive device still has large noise when working.

[0004] Therefore, an urgent need exists for a drive device and camera module to solve the above technical problems. SUMMARY

[0005] Based on the above, the purpose of the utility model is to provide a drive device and camera module, which can reduce the noise generated by the movement of the carrier, better absorb the impact force generated by the vibration, and improve the shock absorption and noise reduction performance of the drive device.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] The drive device comprises:

[0008] A base;

[0009] A shell connected with the base, and a containing space is formed between the shell and the base;

[0010] A carrier arranged in the containing space;

[0011] A drive element connected between the carrier and the base and configured to drive the carrier to move in a first direction relative to the base;

[0012] A cover arranged on the carrier, wherein the cover is provided with an open structure avoiding the drive element;

[0013] A shock-absorbing piece connected with the cover, wherein the shock-absorbing piece comprises a first shock-absorbing part and a second shock-absorbing part, the first shock-absorbing part protrudes from the top of the cover, and the second shock-absorbing part protrudes from the side of the cover.

[0014] In some possible embodiments, the damping member further comprises a connecting portion, and the first damping portion and the second damping portion are connected by the connecting portion; the connecting portion is L-shaped and fixedly attached to the top of the carrier and the side of the carrier, respectively.

[0015] In some possible embodiments, the top of the shell is provided with a first fixing hole, and the first damping portion is fixed in the first fixing hole; the side of the shell is provided with a second fixing hole, and the second damping portion is fixed in the second fixing hole; the intersection of the top and the side of the carrier is provided with a fixing groove, and the connecting portion is fixed in the fixing groove.

[0016] In some possible embodiments, the first damping portion is higher than the top surface of the shell, and the radial dimension of the first damping portion is greater than or equal to the size of the first fixing hole; and / or,

[0017] the second damping portion protrudes from the side surface of the shell, and the radial dimension of the second damping portion is greater than or equal to the size of the second fixing hole.

[0018] In some possible embodiments, the top and the side of the carrier are provided with a plurality of first limiting blocks, and the shell is provided with a plurality of limiting holes corresponding to the positions of the first limiting blocks, and the first limiting blocks protrude out of the shell by penetrating through the corresponding limiting holes; and / or,

[0019] the bottom of the carrier is provided with a second limiting block.

[0020] In some possible embodiments, the heights of the first damping portion and the second damping portion protruding from the shell are greater than the height of the first limiting block protruding from the shell.

[0021] In some possible embodiments, the material of the shell is metal; the material of the damping member is silica gel, rubber or resin; the material of the carrier is plastic; and / or,

[0022] The number of damping members is multiple, and the multiple damping members are distributed on the carrier at intervals.

[0023] In some possible embodiments, the damping member is integrally formed with the shell as an insert by an injection molding process to form a combination, and the carrier is integrally formed with the combination by an injection molding process.

[0024] In some possible embodiments, the base comprises a bottom plate, and the bottom plate is provided with a support wall located on one side of the bottom plate; the driving element is connected between the support wall and the carrier.

[0025] In some possible implementation manners, a first sliding groove is arranged on the side of the carrier opposite to the support wall, a second sliding groove is arranged on the side of the support wall opposite to the carrier, and a guide member is arranged between the first sliding groove and the second sliding groove to enable the carrier to be in sliding connection with the base; and / or,

[0026] A first mounting groove is arranged on the side of the carrier opposite to the support wall, and a second mounting groove is arranged on the side of the support wall opposite to the carrier; the driving element comprises a coil assembly and a magnet assembly, the magnet assembly is arranged in the first mounting groove, and the coil assembly is arranged in the second mounting groove; the coil assembly comprises a shielding plate, a circuit board, a coil and a sensor, the shielding plate, the circuit board and the coil are sequentially arranged on the support wall from the magnet assembly away to the magnet assembly close, and the sensor is connected with the circuit board.

[0027] In some possible implementation manners, a first through hole is arranged on the carrier, and a lens assembly is arranged in the first through hole; a second through hole is arranged on the cover, a third through hole is arranged on the shell, and a fourth through hole is arranged on the bottom plate, the second through hole, the third through hole, the fourth through hole and the first through hole are coaxially arranged and used for passing the lens assembly.

[0028] The camera module comprises a lens assembly and the driving device of any one of the above solutions, the lens assembly is arranged in the carrier of the driving device, and the driving device is used for driving the lens assembly to move in a first direction, the first direction being the optical axis direction of the lens assembly.

[0029] The driving device has the following beneficial effects:

[0030] The driving device has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the driving device provided by the embodiment of the utility model;

[0032] Figure 2 is a structural schematic view of the driving device when the shell is removed provided by the embodiment of the utility model;

[0033] Figure 3 is an exploded view of the driving device provided by the embodiment of the utility model;

[0034] Figure 4 is the exploded schematic view of the carrier and the magnet assembly provided by the embodiment of the utility model, and

[0035] Figure 5 is the first angle exploded schematic view of the base and the coil assembly provided by the embodiment of the utility model, and

[0036] Figure 6 is the second angle exploded schematic view of the base and the coil assembly provided by the embodiment of the utility model, and

[0037] Figure 7 is the exploded schematic view of the carrier, the cover and the damping piece provided by the embodiment of the utility model, and

[0038] Figure 8 is the bottom structure schematic view of the carrier provided by the embodiment of the utility model, and

[0039] Figure 9 is the structure schematic view of the damping piece provided by the embodiment of the utility model.

[0040] In the figure,

[0041] 1, base; 11, bottom plate; 111, fourth through hole; 12, support wall; 121, second sliding groove; 122, second installation slot;

[0042] 2, coil assembly; 21, shielding plate; 22, circuit board; 23, coil; 24, sensor;

[0043] 3, carrier; 31, fixed slot; 32, first limiting block; 33, first sliding groove; 34, first through hole; 35, first installation slot; 36, strip-shaped protrusion; 37, limiting step; 38, second limiting block;

[0044] 4, magnet assembly;

[0045] 5, cover; 51, first fixed hole; 52, second fixed hole; 53, limiting hole; 54, second through hole; 55, strip-shaped hole;

[0046] 6, damping piece; 61, first damping part; 62, second damping part; 63, connecting part;

[0047] 7, shell; 71, third through hole;

[0048] 8, guiding piece. DETAILED DESCRIPTION

[0049] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0050] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0051] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0052] In the description of the utility model, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description and have no special meaning.

[0053] The embodiment provides a kind of driving device, it can be applied to camera module or other equipment, to solve the problem that driving device in prior art due to carrier movement produces impact and noise, leading to the poor shock absorption and noise reduction capability of driving device.

[0054] As Figures 1 to 9As shown, the driving device provided by the embodiment includes a base 1, an outer shell 7, a carrier 3, a driving element, a cover 5 and a damping piece 6. The outer shell 7 is connected with the base 1, and a containing space is formed between the outer shell 7 and the base 1; the carrier 3 is arranged in the containing space; the driving element is connected between the carrier 3 and the base 1 and is configured to drive the carrier 3 to move relative to the base 1 in a first direction; the cover 5 is arranged on the carrier 3, and the cover 5 is provided with an open structure avoiding the driving element; the damping piece 6 is connected with the cover 5, and the damping piece 6 has a spacing between the cover 5 and the outer shell 7, and the damping piece 6 includes a first damping part 61 and a second damping part 62, the first damping part 61 protrudes from the top of the cover 5, and the second damping part 62 protrudes from the side of the cover 5. In the embodiment, the base 1 serves as a fixed part of the driving device, the carrier 3 serves as an actuating part of the driving device, and the driving element can drive the carrier 3 to move relative to the base 1 in the first direction. Exemplarily, when the driving device is applied to a camera module, the first direction is the optical axis direction of a lens assembly, and at this time, the carrier 3 can drive the lens assembly to reciprocate along the optical axis direction of the lens assembly to realize the focusing function.

[0055] The first damping part 61 of the embodiment protrudes from the top of the cover 5 and can buffer the impact force between the top of the carrier 3 and the outer shell 7 during movement; the second damping part 62 protrudes from the side of the cover 5 and can buffer the impact force between the side of the carrier 3 and the outer shell 7 during movement. The damping piece 6 as a whole can absorb the noise generated by the impact of the carrier 3 during movement, reduce vibration, and improve the damping and noise reduction performance of the driving device. In the embodiment, the damping piece 6 is made of elastic material, such as silica gel, rubber or resin, so as to better absorb the impact force generated by vibration and protect the driving device from vibration. Alternatively, a plurality of damping pieces 6 are provided in the embodiment, and the plurality of damping pieces 6 are symmetrically distributed on opposite sides of the carrier 3. In addition, the damping piece 6 can also be arranged on the front side of the carrier 3.

[0056] In the embodiment, the damping piece 6 further includes a connecting part 63, and the first damping part 61 and the second damping part 62 are connected through the connecting part 63. Specifically, the connecting part 63 is L-shaped and is fixedly attached to the top of the carrier 3 and the side of the carrier 3. Preferably, the first damping part 61, the second damping part 62 and the connecting part 63 are of an integrated structure. Further, the top of the cover 5 is provided with a first fixing hole 51, and the first damping part 61 is fixed in the first fixing hole 51; the side of the cover 5 is provided with a second fixing hole 52, and the second damping part 62 is fixed in the second fixing hole 52; and the intersection of the top and the side of the carrier 3 is provided with a fixing groove 31, and the connecting part 63 is fixed in the fixing groove 31. Specifically, the above-mentioned fixed manner can be clamping, bonding, one-piece injection molding or the like, as long as it can realize reliable fixation of the damping piece 6.

[0057] Preferably, the first damping part 61 is higher than the top surface of the cover 5, and has a radial dimension greater than or equal to the size of the first fixing hole 51; the second damping part 62 is higher than the side surface of the cover 5, and has a radial dimension greater than or equal to the size of the second fixing hole 52, so that the connection between the damping member 6 and the cover 5 is more stable and reliable, and the damping member 6 is effectively prevented from being loosened from the cover 5.

[0058] Further, the top surface and the side surface of the carrier 3 are further provided with a plurality of first limiting blocks 32, and the cover 5 is provided with a plurality of limiting holes 53 corresponding to the positions of the first limiting blocks 32, each first limiting block 32 passes through the corresponding limiting hole 53 and protrudes outward from the cover 5. In the embodiment, the first limiting blocks 32 can limit and buffer the movement of the carrier 3, so that the carrier 3 is prevented from being damaged due to excessive movement; the first limiting blocks 32 are fixed through the limiting holes 53, so that the connection reliability between the carrier 3 and the cover 5 is increased. Further, the heights of the first damping part 61 and the second damping part 62 protruding from the cover 5 are greater than the height of the first limiting blocks 32 protruding from the cover 5, so that when the carrier 3 moves in the shell 7, the first damping part 61 and the second damping part 62 can first buffer and dampen the shell 7, and the noise generated by the movement of the carrier 3 is effectively reduced. In the embodiment, the first limiting blocks 32 are higher than the cover 5, and have a radial dimension greater than or equal to the size of the limiting hole 53, so that the connection stability between the carrier 3 and the cover 5 is further increased, and the cover 5 is prevented from being loosened from the carrier 3. In addition, the bottom of the carrier 3 can also be provided with a plurality of second limiting blocks 38 to reduce the impact between the carrier 3 and the base 1. In addition, the intersection between the top of the carrier 3 and the front side of the carrier 3 is further provided with a strip-shaped protrusion 36, and the cover 5 is provided with a strip-shaped hole 55 at the corresponding position, the strip-shaped protrusion 36 can pass through the strip-shaped hole 55 and be fixedly connected with the strip-shaped hole 55, so that the connection stability between the cover 5 and the carrier 3 is further increased.

[0059] In the embodiment, the material of the carrier 3 is plastic, and the damping member 6 can be fixed with the cover 5 and the carrier 3 through two molding processes. The first molding process is that the damping member 6 is integrally molded with the cover 5 as an insert through injection molding; the second molding process is that the carrier 3 is integrally molded with the combination of the damping member 6 and the cover 5 through injection molding. The above-mentioned arrangement processes the damping member 6, the cover 5 and the carrier 3 into an integrated structure, so that the damping member 6 is more firmly fixed, the structure is more stable, and the damping member 6, the cover 5 and the carrier 3 are prevented from shaking, which is conducive to further reducing the noise of the driving device.

[0060] Optionally, the base 1 comprises a bottom plate 11, and a support wall 12 is arranged on the bottom plate 11 and located at one side of the bottom plate 11; the driving element is connected between the support wall 12 and the carrier 3. In the embodiment, the bottom plate 11 and the support wall 12 can be of an integrated structure or a split structure; when the split structure is adopted, the support wall 12 can be fixed to the bottom plate 11 by means of bonding, screwing, clamping or the like. Further, the support wall 12 of the embodiment is arranged perpendicularly to the bottom plate 11.

[0061] In the embodiment, the carrier 3 is slidingly connected with the support wall 12. Specifically, the side opposite to the support wall 12 of the carrier 3 is provided with a first sliding groove 33, and the side opposite to the carrier 3 of the support wall 12 is provided with a second sliding groove 121; the first sliding groove 33 and the second sliding groove 121 both extend along the first direction, and a guide 8 is installed between the first sliding groove 33 and the second sliding groove 121, so that the carrier 3 can slide along the first direction relative to the base 1. The above arrangement increases the smoothness and operation accuracy of the movement of the carrier 3 along the first direction. Specifically, the guide 8 can be a plurality of balls or a guide column extending along the first direction, both of which can play a good guiding role. Preferably, the embodiment adopts the balls for guiding.

[0062] Further, the side of the carrier 3 close to the support wall 12 is provided with a first mounting groove 35, and the support wall 12 is provided with a second mounting groove 122. The driving device of the embodiment can be driven by a voice coil motor, piezoelectric material or other means. Preferably, the embodiment adopts the voice coil motor to realize the driving. Specifically, the driving element comprises a coil assembly 2 and a magnet assembly 4; the magnet assembly 4 is installed in the first mounting groove 35, and the coil assembly 2 is installed in the second mounting groove 122, and the coil assembly 2 is arranged opposite to the magnet assembly 4.

[0063] Optionally, the coil assembly 2 comprises a shielding plate 21, a circuit board 22, a coil 23 and a sensor 24; the shielding plate 21, the circuit board 22 and the coil 23 are sequentially installed in the second mounting groove 122 of the support wall 12 from the side far away from the magnet assembly 4 to the side close to the magnet assembly 4; the sensor 24 is connected with the circuit board 22, and the sensor 24 is used for sensing the change of the magnetic field. The circuit board 22 of the embodiment can be a flexible circuit board, a rigid circuit board or a soft and hard combined circuit board; when the circuit board is a flexible circuit board, a reinforcing plate can also be arranged to increase the strength of the flexible circuit board. Optionally, the magnet assembly 4 of the embodiment comprises a plurality of magnetic stones combined together, and each magnetic stone is installed in the first mounting groove 35.

[0064] In the embodiment, the cover 5 is arranged on the carrier 3, and the bottom of the cover 5 is provided in an open manner to facilitate machining and assembly; meanwhile, the side of the cover 5 facing the supporting wall 12 is also provided in an open manner to avoid shielding the magnet assembly 4. The cover 5 is made of metal, which can play a role in heat dissipation of the driving device. Specifically, the cover 5 can be made of iron, stainless steel or the like. Further, the side and top of the carrier 3 are also provided with limiting steps 37 matched with the profile edges of the open end of the cover 5, so that the cover 5 can be well limited, and the carrier 3 and the cover 5 can be better engaged and fixed.

[0065] In the embodiment, the shell 7 is buckled above the base 1, and the coil assembly 2, the carrier 3, the magnet assembly 4, the cover 5 and the damping member 6 are all accommodated in the accommodation space between the shell 7 and the base 1, so that the internal devices can be well protected by the shell 7. Preferably, the shell 7 is made of metal, and the shell 7 is in the shape of a quadrilateral shell with an open lower end. The shell 7 can be made of metal material, punched, bent, and then laser welded on the four closed sides.

[0066] To facilitate the application of the driving device in a camera device, the carrier 3 is also provided with a first through hole 34 for mounting a lens assembly; meanwhile, the cover 5 is provided with a second through hole 54, the shell 7 is provided with a third through hole 71, and the bottom plate 11 is provided with a fourth through hole 111. The second through hole 54, the third through hole 71 and the fourth through hole 111 are coaxially arranged with the first through hole 34 and are used for passing the lens assembly. In this way, when the focal length of the lens assembly needs to be adjusted, the carrier 3 can be driven by the driving element to drive the lens assembly to reciprocate along the optical axis direction relative to the base 1, so as to realize focusing.

[0067] The embodiment also provides a camera module, which comprises a lens assembly and the above-mentioned driving device. The lens assembly is mounted in the carrier 3 of the driving device, and the driving device is used for driving the lens assembly to move in a first direction. The first direction is specifically the optical axis direction of the lens assembly. Since the camera module adopts all the technical solutions of all the embodiments of the above-mentioned driving device, the camera module at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described here.

[0068] Obviously, the above-mentioned embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A driving device, characterized in that, include: Base; The outer shell is connected to the base, and an accommodating space is formed between the outer shell and the base; The carrier is disposed in the accommodating space; A driving element, connected between the carrier and the base, is configured to drive the carrier to move relative to the base in a first direction; A cover is disposed on the carrier, and the cover has an open structure to avoid the drive element; A shock absorber is connected to the housing. The shock absorber includes a first shock absorber and a second shock absorber. The first shock absorber protrudes from the top of the housing, and the second shock absorber protrudes from the side of the housing.

2. The driving device according to claim 1, characterized in that, The shock absorber also includes a connecting portion, through which the first shock absorber and the second shock absorber are connected; the connecting portion is L-shaped and is respectively fitted and fixed to the top and the side of the carrier.

3. The driving device according to claim 2, characterized in that, The top of the cover is provided with a first fixing hole, and the first shock-absorbing part is fixed to the first fixing hole; the side of the cover is provided with a second fixing hole, and the second shock-absorbing part is fixed to the second fixing hole; a fixing groove is provided at the junction of the top and side of the carrier, and the connecting part is fixed in the fixing groove.

4. The driving device according to claim 3, characterized in that, The portion of the first shock-absorbing part above the top surface of the housing has a radial dimension greater than or equal to the size of the first fixing hole; and / or, The portion of the second shock-absorbing part that protrudes from the side of the cover has a radial dimension greater than or equal to the dimension of the second fixing hole.

5. The driving device according to claim 1, characterized in that, The top and sides of the carrier are provided with a plurality of first limiting blocks, and the cover is provided with a plurality of limiting holes corresponding to the positions of each of the first limiting blocks. The first limiting blocks pass through the corresponding limiting holes and protrude out of the cover; and / or, A second limiting block is provided at the bottom of the carrier.

6. The driving device according to claim 5, characterized in that, The height by which the first shock-absorbing part and the second shock-absorbing part protrude from the cover is greater than the height by which the first limiting block protrudes from the cover.

7. The driving device according to claim 1, characterized in that, The casing is made of metal; the shock absorber is made of silicone, rubber, or resin; the carrier is made of plastic; and / or, The number of shock absorbers is multiple, and the multiple shock absorbers are distributed at intervals on the carrier.

8. The driving device according to claim 7, characterized in that, The shock absorber is integrally formed with the housing as an insert through injection molding to form a composite body, and the carrier is integrally formed with the composite body through injection molding.

9. The driving device according to claim 1, characterized in that, The base includes a base plate, on which a support wall is provided, the support wall being located on one side of the base plate; the driving element is connected between the support wall and the carrier.

10. The driving device according to claim 9, characterized in that, A first sliding groove is provided on the side of the carrier opposite to the supporting wall, and a second sliding groove is provided on the side of the supporting wall opposite to the carrier. A guide is installed between the first sliding groove and the second sliding groove to allow the carrier to slide in connection with the base; and / or, The carrier has a first mounting groove on the side opposite to the support wall, and the support wall has a second mounting groove on the side opposite to the carrier. The driving element includes a coil assembly and a magnet assembly. The magnet assembly is installed in the first mounting groove, and the coil assembly is installed in the second mounting groove. The coil assembly includes a shielding plate, a circuit board, a coil, and a sensor. The shielding plate, the circuit board, and the coil are installed sequentially on the support wall from the side furthest from the magnet assembly to the side closest to the magnet assembly. The sensor is connected to the circuit board.

11. The driving device according to claim 9, characterized in that, The carrier has a first through hole for mounting a lens assembly; the cover has a second through hole; the outer shell has a third through hole; and the base plate has a fourth through hole. The second, third, and fourth through holes are coaxially arranged with the first through hole to allow the lens assembly to pass through.

12. A camera module, characterized in that, The device includes a lens assembly and a driving device as described in any one of claims 1-11, wherein the lens assembly is mounted in a carrier of the driving device, and the driving device is used to drive the lens assembly to move along a first direction, wherein the first direction is the optical axis direction of the lens assembly.

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