Combined spring structure and rotating-bead-type Anti-shake motor thereof

Abstract

A combined spring structure, comprising a plurality of sets of anti-shake springs vertically arranged, and upper elastic pieces (10) and / or lower elastic pieces (12), wherein the anti-shake springs are formed by assembling a plurality of anti-shake elastic pieces (6) and connectors (61). Also provided is a rotating-bead-type anti-shake motor.

Description

A combined spring structure and its ball-type anti-shake motor Technical Field

[0001] The utility model relates to the technical field of anti-shake motors, in particular to a combined spring structure and a rotating ball type anti-shake motor thereof. Background Art

[0002] To address the issue of blurry photos taken with mobile phones and improve image stability in both photos and videos, the technology behind anti-shake motors has been continuously evolving. Existing anti-shake motors include suspended wire-type, ball-bearing-type, memory metal (SMA)-type, and shrapnel-type. The commonly used shrapnel-type 3D spring is a bending-molding process.

[0003] The existing Chinese utility model patent with authorization announcement number CN216286096U discloses a new type of spring for an anti-shake camera drive device. The spring includes an integrally formed horizontal overlapping portion and a bent connection portion main body. The elastic deformation direction of the bent connection portion main body is consistent with the radial direction of the lens, which is used to achieve anti-shake adjustment.

[0004] However, the following defects exist in the production of the shrapnel: (1) Process: The bending process is difficult to form, and the surface of the shrapnel is prone to serious damage during the forming process, resulting in low yield and poor mass production. (2) Performance: The actual spring structure formed by bending is very different from the designed structure, resulting in unstable product performance, easy to break after the reliability test, and easy to oxidize and rust. (3) Material: Since the Young's modulus and rigidity of the spring material are large, and the voice coil motor is a small-sized precision component, it is not suitable for small R-angle bending. The bending forming material is seriously worn and the overall service life is short. The spring material currently selected for the motor is TM10 and above. This spring has good performance but the material is too hard. From the R and / or T ratio (the ratio of the minimum radius of the 90° bending of the shrapnel to the thickness) in the existing material property table, it can be seen that the material currently used is not suitable for small R-angle bending.

[0005] Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a combined spring structure and a rotating ball anti-shake motor thereof, which can be quickly assembled, avoid the trouble of traditional bending, and improve product performance.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a combined spring structure, which includes several groups of anti-shake springs and upper spring plates and / or lower spring plates, and the angle between the anti-shake spring and the top surface of the base and the upper spring plates and / or lower spring plates is between 70° and 110°, and the upper spring plates and / or lower spring plates are parallel to the base. Each group of the anti-shake springs is fixed to the base and bracket of the anti-shake motor, and the anti-shake spring includes two anti-shake springs and at most one connecting member, one end of the two anti-shake springs are fixed to the connecting member or one end of the two anti-shake springs are connected and fixed, and the other end of the two anti-shake springs is fixed to the upper spring plate and / or lower spring plate, and the anti-shake spring has at least one opening.

[0008] Preferably, the anti-shake spring is a rotationally symmetrical or mirror-symmetrical structure, and the opening is upward or downward.

[0009] Preferably, the upper spring sheet and / or the lower spring sheet and the anti-shake spring sheet, as well as the anti-shake spring sheet and the connecting piece are fixed by soldering, dispensing glue or laser welding.

[0010] Preferably, the anti-shake spring sheet is provided with several reinforcing structures for cooperating with soldering, gluing or laser welding to enhance the fixing strength between the anti-shake spring sheet and the upper spring sheet and / or the lower spring sheet, and between the anti-shake spring sheet and the connecting piece. The upper spring sheet and / or the lower spring sheet and the connecting piece are all provided with sockets, and the anti-shake spring sheet has several extensions extending into the sockets.

[0011] Preferably, the reinforcement structure is a reinforcement plate provided on the anti-shake spring plate. When the extension part is inserted into the socket, the reinforcement plate, the extension part and the upper spring plate and / or the lower spring plate or the connecting piece form a fixed area for dispensing, soldering or laser welding.

[0012] Preferably, the reinforcement structure is a notch formed on the extension portion, and when the extension portion is inserted into the insertion hole, the notch and the insertion hole are located in the same area.

[0013] A rotating ball type anti-shake motor includes the combined spring structure described above, a housing, and an OIS component arranged between the base and the housing. The OIS component includes an OIS rotating ball, an FPC board, an OIS coil, a bracket, a magnet, a carrier, and an AF rotating ball arranged between the base and the housing.

[0014] Preferably, a plurality of bottom grooves are provided on the base, the OIS rotating beads are movably arranged in the bottom grooves, the bracket is in contact with the OIS rotating beads, and when the anti-shake motor moves, the OIS rotating beads rotate in place in the bottom grooves.

[0015] Preferably, a plurality of side grooves are provided on the side of the carrier, the AF rotating bead is movably arranged in the side groove, the bracket is in contact with the AF rotating bead, and when the anti-shake motor moves, the AF rotating bead rotates in place in the side groove.

[0016] Preferably, the bottom groove and the side groove are in the shape of a triangular prism or a quadrangular prism, the angle between the bottom surface and the side surface of the bottom groove and the side groove is greater than or equal to 90 degrees and less than 180 degrees, the connection between the adjacent side surfaces of the inner walls of the bottom groove and the side groove is set to a rounded corner or a C angle or is not processed, there are gaps around the OIS rotating bead and the inner wall of the bottom groove, and the AF rotating bead and the inner wall of the side groove, the contact between the AF rotating bead and the side groove, and the OIS rotating bead and the bottom groove is point contact, and the contact points are 1-3 points.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model adopts a combined spring structure formed by splicing two anti-shake springs and a connecting piece. Compared with the traditional one-piece bending spring, on the one hand, its manufacturing process is simple and fast, and the splicing is also fast, avoiding the trouble of the traditional bending process and the problem that the surface of the spring is easily damaged during the bending forming process, and has good mass producibility. On the other hand, the difference between the spliced ​​forming structure and the design structure is small, the product performance is stable, the anti-reliability test performance is good, the spring surface is intact and not easy to oxidize and rust, and at the same time, small R-angle bending is avoided. The existing material is not suitable for small R-angle bending, and the bending forming material is seriously consumed. Moreover, through the combined spring structure, the support force in the Z-axis direction can be increased, thereby overcoming the posture difference in the Z-axis direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 is a schematic diagram of the explosion structure of Figure 1 of the present invention;

[0021] FIG3 is a schematic diagram of the structure of FIG1 of the present invention after removing the housing;

[0022] Figure 4 is a schematic diagram of the structure of point A in Figure 3 of the present invention;

[0023] FIG5 is a schematic diagram of the structure of the anti-shake spring piece and the lower spring piece when they are fixed to each other;

[0024] FIG6 is a schematic structural diagram of the present invention when the reinforcing structure is a reinforcing sheet provided on the anti-shake spring sheet;

[0025] FIG7 is a schematic diagram of the structure of the reinforcing structure of the present invention when a hole is opened in the middle area of ​​the extension portion;

[0026] FIG8 is a schematic diagram of the structure of the reinforcing structure of the present invention when side openings are provided on both sides of the extension portion;

[0027] Figure 9 is a schematic diagram of the structure of the utility model when a square bottom groove is provided on the base;

[0028] Figure 10 is a schematic diagram of the structure of the utility model when a trapezoidal bottom groove is provided on the base;

[0029] Figure 11 is a schematic diagram of the structure of the carrier and side grooves of the utility model;

[0030] FIG12 is a schematic diagram of the structure of the S-shaped anti-shake spring piece of the present invention;

[0031] FIG13 is a schematic diagram of the structure of the W-shaped anti-shake spring piece of the present invention;

[0032] Among them: 1. Base; 2. FPC board; 3. OIS coil; 4. OIS bead; 5. Bracket; 6. Anti-shake spring; 61. Connector; 62. Reinforcement plate; 63. Notch; 64. Through hole; 7. Magnet; 8. Carrier; 81. Side groove; 9. AF bead; 10. Upper spring; 101. First spring; 102. Second spring; 11. Shell; 12. Lower spring; 13. Bottom groove. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without making any creative work are all within the scope of protection of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0034] As shown in Figures 1 to 8, the present invention provides a combined spring structure, which includes several groups of anti-shake springs and upper spring plates 10 and / or lower spring plates 12. The angle between the anti-shake springs and the top surface of the base 1 and the upper spring plates 10 and / or lower spring plates 12 is between 70° and 110°. The upper spring plates 10 and / or lower spring plates 12 are parallel to the base 1. Each group of anti-shake springs is fixed to the base 1 and the bracket 5 of the anti-shake motor (plug-in fixation is optimal). The anti-shake spring includes two anti-shake springs 6 and at most one connecting member 61. One end of the two anti-shake springs 6 is fixed to the connecting member 61 or one end of the two anti-shake springs 6 is connected and fixed (plug-in fixation is optimal). The other ends of the two anti-shake springs 6 are fixed to the upper spring plate 10 and / or lower spring plate 12 (plug-in fixation is optimal). The anti-shake spring 6 has at least one opening.

[0035] In addition, to achieve the best fixing effect between the anti-shake spring and the base 1 and the bracket 5 of the anti-shake motor, after fixing the other end of the anti-shake shrapnel 6 to the upper shrapnel 10 and / or the lower shrapnel 12, the upper shrapnel 10 and / or the lower shrapnel 12 can be fixed to the bracket 5 and / or the base 1 to make the fixing more stable;

[0036] A combined spring structure formed by splicing two anti-shake shrapnels 6 and a connecting piece 61. Compared with the traditional integrally bent shrapnel, on the one hand, its manufacturing process is simple and fast, and the splicing is also fast, avoiding the trouble of the traditional bending process and the serious problem of easy surface damage of the shrapnel during the bending and forming process, with good mass production performance. On the other hand, the formed structure by splicing has a small difference from the designed structure, the product performance is stable, the performance in the anti-trust experiment is good, the surface of the spring is intact and not easy to oxidize and rust, and at the same time, the small R-angle bending is avoided. The existing shrapnels with good material properties and relatively hard are not suitable for small R-angle bending (see the following material property table), and the material loss during bending and forming is serious. This combined spring structure can use shrapnels with good performance and greater hardness, and has a wider range of applications;

[0037] Material Property Table

[0038] In addition, the existing bent shrapnels can only be made of one material and have the same thickness, while the materials of the anti-shake shrapnel 6 and the upper shrapnel 10 and / or the lower shrapnel 12 in the combined spring structure can be set separately, and the thickness can also be selected according to different characteristics and application scenarios, which is more flexible than the existing integrally bent shrapnel design.

[0039] The anti-shake shrapnel 6 has a rotationally symmetric or mirror-symmetric structure, with the opening facing upward or downward. Specifically, the anti-shake shrapnel 6 is arc-shaped or U-shaped, and can also be S-shaped (as shown in Figure 12) or W-shaped (as shown in Figure 13) or other shapes with more openings. Here, it will not be elaborated too much. By setting the arc-shaped or U-shaped anti-shake shrapnel 6, the supporting force in the Z-axis direction is large, so that the posture difference in the Z-axis direction can be well overcome.

[0040] As shown in Figures ⑥-⑧, a number of through holes 64 are provided on the anti-shake shrapnel 6 for adjusting the K value of the spring to prevent the anti-shake shrapnel 6 from being too hard to achieve a good anti-shake effect;

[0041] As shown in Figures ⑥-⑧, the upper shrapnel 10 includes a first shrapnel 101 and a second shrapnel 102, which are respectively inserted and fixed to the two anti-shake shrapnels 6;

[0042] The specific shape of the anti-shake shrapnel 6 can be set to any shape according to the requirements of the spring K value.

[0043] As shown in Figures ③-⑧, the upper shrapnel 10 and / or the lower shrapnel 12 and the connecting piece 61 are all provided with jacks, and the anti-shake shrapnel 6 has a number of extending parts extending into the jacks;

[0044] The size of the socket can be adapted to the size of the extension, and the fixation can be completed by normal plugging and locking;

[0045] On the basis that one end of the two anti-shake springs 6 are plugged and fixed to the connecting piece 61 and the other ends of the two anti-shake springs 6 are plugged and fixed to the upper spring piece 10 and / or the lower spring piece 12, the upper spring piece 10 and / or the lower spring piece 12 and the anti-shake spring piece 6, as well as the anti-shake spring piece 6 and the connecting piece 61 are fixed by soldering, dispensing glue or laser welding;

[0046] Fixing by soldering, gluing or laser welding makes the fixation between each other more stable, and fixing by soldering, gluing or laser welding can make the size of the socket opened during plugging and fixing larger than the size of the extension, eliminating the need for precise fitting and the trouble of precise opening of the socket.

[0047] As shown in Figures 6 to 8, the anti-shake spring piece 6 is provided with a number of reinforcing structures for cooperating with soldering, dispensing or laser welding to enhance the fixing strength between the anti-shake spring piece 6 and the upper spring piece 10 and / or the lower spring piece 12, and between the anti-shake spring piece 6 and the connecting piece 61, so that the connection is not easily separated;

[0048] As shown in FIG6 , the reinforcement structure is a reinforcement sheet 62 provided on the anti-shake spring sheet 6. When the extension portion is inserted into the insertion hole, the reinforcement sheet 62, the extension portion, and the upper spring sheet 10 and / or the lower spring sheet 12 or the connector 61 form a fixing area for gluing, soldering, or laser welding, thereby strengthening the connection strength between the anti-shake spring sheet 6 and the upper spring sheet 10 and / or the lower spring sheet 12, and between the anti-shake spring sheet 6 and the connector 61.

[0049] As shown in Figures 7 and 8, the reinforcement structure is a notch 63 provided on the extension portion. When the extension portion is inserted into the insertion hole, the notch 63 and the insertion hole are located in the same area, which facilitates dispensing, soldering, or laser welding, and strengthens the connection strength between the anti-shake spring 6 and the upper spring 10 and / or lower spring 12, as well as between the anti-shake spring 6 and the connector 61.

[0050] The notch 63 can be roughly divided into two situations. One is to open a hole in the middle area of ​​the extension part, as shown in Figure 7, and the other is to open side openings on both sides of the extension part, as shown in Figure 8. This can increase the area for gluing, soldering or laser welding, thereby strengthening the connection strength between the anti-shake spring plate 6 and the upper spring plate 10 and / or the lower spring plate 12, and between the anti-shake spring plate 6 and the connecting piece 61.

[0051] As shown in FIG. 4 and FIG. 5 , two anti-shake springs 6 are respectively inserted into the bracket 5 and the base 1 , so that the anti-shake springs 6 are fixed more stably and the anti-shake effect is better.

[0052] As shown in Figures 1-4, a bead-type anti-shake motor includes a combined spring structure, a housing 11, and an OIS component disposed between a base 1 and the housing 11. The OIS component includes an OIS bead 4, an FPC board 2, an OIS coil 3, a bracket 5, a magnet 7, a carrier 8, and an AF bead 9 disposed between the base 1 and the housing 11.

[0053] The specific assembly process of the bead-type anti-shake motor is as follows: the carrier 8 is assembled and fixed to the steel sheet, and then assembled with the AF bead 9 to form a "semi-finished product". The upper spring plate 10 and / or the lower spring plate 12 are then spliced ​​and fixed to the anti-shake spring plate 6 to form a combined spring structure. The combined spring structure and the semi-finished product are assembled into a "semi-finished moving part product". The bracket 5 and the magnet 7 are then assembled together with the semi-finished moving part product to form an "OIS component semi-finished product". The base 1 is assembled with the FPC board 2, and then assembled with the OIS coil 3 and OIS bead 4. Finally, it is assembled with the semi-finished OIS component product, and finally assembled with the housing 11 to form a finished product.

[0054] This type of ball-type anti-shake motor can generate pre-pressure in the Z direction by setting up the combined spring structure, which can suppress the posture difference caused by the weight of the OIS component, thereby controlling the initial position of the motor and improving the anti-shake accuracy and stability.

[0055] The base 1 is provided with a plurality of bottom grooves 13. The OIS beads 4 are movably disposed in the bottom grooves 13. The bracket 5 contacts the OIS beads 4. When the anti-shake motor moves, the OIS beads 4 rotate in place in the bottom grooves 13.

[0056] The side of the carrier 8 is provided with a plurality of side grooves 81. The AF rotating bead 9 is movably arranged in the side grooves 81. The bracket 5 is in contact with the AF rotating bead 9. When the anti-shake motor moves, the AF rotating bead 9 rotates in place in the side grooves 81.

[0057] As shown in Figures 9 and 10, the bottom groove 13 and the side groove 81 are in the shape of a triangular prism or a quadrangular prism. The angle between the bottom surface and the side surface of the bottom groove 13 and the side groove 81 is greater than or equal to 90 degrees and less than 180 degrees. The connection between each adjacent side surface of the inner wall of the bottom groove 13 and the side groove 81 is set as a rounded corner or a C angle or is not processed. There is a gap around the OIS rotating bead 4 and the inner wall of the bottom groove 13, and around the AF rotating bead 9 and the inner wall of the side groove 81. The size of the bottom groove 13 and the side groove 81 can only allow the OIS rotating bead 4 and the AF rotating bead 9 to rotate in place on their inner walls. Unlike traditional methods, the AF bead 9 and the side groove 81, as well as the OIS bead 4 and the bottom groove 13, are in point contact, with 1-3 contact points. The quadrangular pyramid-shaped bottom groove 13 can be square as shown in FIG9 or trapezoidal as shown in FIG10. When the OIS bead 4 moves, there are only three points of contact between the OIS bead 4 and the bottom groove 13 at most, and the friction in the XY direction is consistent. Therefore, there is no need to set up a two-layer platform, and the overall size of the motor is reduced. The bead has fewer contact points with the groove, and the movement is more stable.

[0058] Traditional ball-type anti-shake motors usually use a V-shaped groove on the platform. One layer of platform is required for movement in one axis, so two layers are required for anti-shake movement in the XY direction. Alternatively, existing ball-type anti-shake motors usually use a large cylindrical groove on the platform. However, the position of the ball in both methods is arbitrary, the friction of the ball structure is uncontrollable, and the position state of the ball is uncontrollable. The ball movement may be rolling or sliding, and the consistency is poor. The purpose of the triangular or quadrangular bottom groove 13 is to limit the rotating ball and let it rotate in place.

[0059] In addition, the inner walls of the bottom groove 13 and the side groove 81 are provided with a wear-resistant layer. The wear-resistant layer can be laid on the inner walls of the bottom groove 13 and the side groove 81 using wear-resistant and rigid materials to replace the traditional plastic inner wall, thereby avoiding the appearance of pits after the reliability test, causing the OIS rotating bead 4 and the AF rotating bead 9 to jam.

[0060] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined spring structure, characterized in that: The combined spring structure comprises a plurality of groups of anti-shake springs and upper spring plates (10) and / or lower spring plates (12); the angles between the anti-shake springs and the top surface of the base (1) and the upper spring plates (10) and / or the lower spring plates (12) are between 70° and 110°; the upper spring plates (10) and / or the lower spring plates (12) are parallel to the base (1); each group of the anti-shake springs is fixed to the base (1) and the bracket (5) of the anti-shake motor; the anti-shake springs comprise two anti-shake spring plates (6) and at most one connecting member (61); one end of the two anti-shake spring plates (6) are fixed to the connecting member (61) or one end of the two anti-shake spring plates (6) are connected and fixed; the other ends of the two anti-shake spring plates (6) are fixed to the upper spring plates (10) and / or the lower spring plates (12); and the anti-shake spring plates (6) have at least one opening.

2. The combined spring structure according to claim 1, characterized in that: The anti-shake spring sheet (6) is a rotationally symmetrical or mirror-symmetrical structure, and the opening is upward or downward.

3. The combined spring structure according to claim 1, characterized in that: The upper spring sheet (10) and / or the lower spring sheet (12) and the anti-shake spring sheet (6), as well as the anti-shake spring sheet (6) and the connecting piece (61) are fixed by soldering, glue dispensing or laser welding.

4. The combined spring structure according to claim 3, characterized in that: The anti-shake spring sheet (6) is provided with a plurality of reinforcing structures for cooperating with soldering, gluing or laser welding to enhance the fixing strength between the anti-shake spring sheet (6) and the upper spring sheet (10) and / or the lower spring sheet (12), and between the anti-shake spring sheet (6) and the connecting piece (61); the upper spring sheet (10) and / or the lower spring sheet (12) and the connecting piece (61) are provided with insertion holes, and the anti-shake spring sheet (6) has a plurality of extension portions extending into the insertion holes.

5. The combined spring structure according to claim 4, characterized in that: The reinforcing structure is a reinforcing sheet (62) provided on the anti-shake spring sheet (6); when the extension portion is inserted into the insertion hole, the reinforcing sheet (62), the extension portion and the upper spring sheet (10) and / or the lower spring sheet (12) or the connecting piece (61) form a fixing area for gluing, soldering or laser welding.

6. The combined spring structure according to claim 4, characterized in that: The reinforcement structure is a notch (63) opened on the extension part, and when the extension part is inserted into the insertion hole, the notch (63) and the insertion hole are located in the same area.

7. A ball-type anti-shake motor, comprising the combined spring structure according to any one of claims 1 to 6, characterized in that: It also includes a shell (11) and an OIS component arranged between the base (1) and the shell (11), wherein the OIS component includes an OIS rotating bead (4) arranged between the base (1) and the shell (11), an FPC board (2), an OIS coil (3), a bracket (5), a magnet (7), a carrier (8) and an AF rotating bead (9).

8. The bead-type anti-shake motor according to claim 7, characterized in that: The base (1) is provided with a plurality of bottom grooves (13), the OIS rotating bead (4) is movably arranged in the bottom groove (13), the bracket (5) is in contact with the OIS rotating bead (4), and when the anti-shake motor moves, the OIS rotating bead (4) rotates in situ in the bottom groove (13).

9. The bead-type anti-shake motor according to claim 8, characterized in that: The side edge of the carrier (8) is provided with a plurality of side grooves (81), the AF rotating bead (9) is movably arranged in the side groove (81), the bracket (5) is in contact with the AF rotating bead (9), and when the anti-shake motor moves, the AF rotating bead (9) rotates in situ in the side groove (81).

10. The bead-type anti-shake motor according to claim 9, characterized in that: The bottom groove (13) and the side groove (81) are in the shape of a triangular prism or a quadrangular prism; the angle between the bottom surface and the side surface of the bottom groove (13) and the side groove (81) is greater than or equal to 90 degrees and less than 180 degrees; the connection between each adjacent side surface of the inner wall of the bottom groove (13) and the side groove (81) is set as a rounded corner or a C angle or is not processed; there are gaps around the OIS rotating bead (4) and the inner wall of the bottom groove (13) and the AF rotating bead (9) and the inner wall of the side groove (81); the contact between the AF rotating bead (9) and the side groove (81) and the OIS rotating bead (4) and the bottom groove (13) is point contact, and the contact points are 1-3 points.

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