Ball closed-loop motor, camera module and electronic equipment

Abstract

The invention belongs to the technical field of photography and camera shooting, and discloses a ball closed-loop motor which comprises a support, a carrier and a driving mechanism. A lens is arranged on the bracket; an optical filter is arranged on the carrier, and a guide component I and a guide component II are arranged between the carrier and the bracket, so that the carrier can slide relative to the bracket along an optical axis; the driving mechanism is used for driving the carrier to move relative to the bracket; the first guide component and the second guide component are adjacently arranged, the first guide component comprises at least two first balls, the second guide component comprises second balls, and in the plane where the first balls and the second balls are located, the first balls and the second balls form a triangular structure. The first ball and the second ball are of a triangular structure in the same plane, so that the use stability of the motor is improved, and the definition of a shot picture is ensured. The invention further discloses a camera module with the ball closed-loop motor and electronic equipment with the camera module.

Description

Technical Field

[0001] The invention belongs to the technical field of photography and videography, and in particular relates to a ball closed-loop motor, a videography module and electronic equipment. Background Art

[0002] In the field of photography and videography, the performance of the focus structure is crucial to the shooting effect. As users' requirements for shooting effects continue to increase, the design and improvement of the focus system has become the focus of camera and lens manufacturers. Among them, the introduction of the ball structure is an important direction for optimizing the focus system.

[0003] However, the current ball bearing structure cannot well meet the stability requirements of the focusing movement, and therefore cannot well ensure the clarity of the captured image. Summary of the invention

[0004] In order to solve the above technical problems, the present invention discloses a ball closed-loop motor, which makes the first ball and the second ball form a triangular structure in the same plane to improve the stability of the motor and ensure the clarity of the shooting picture. The present invention also discloses a camera module having the above ball closed-loop motor and an electronic device having the camera module.

[0005] The specific technical solutions of the present invention are as follows:

[0006] A ball closed-loop motor, comprising:

[0007] A bracket, on which a lens is arranged;

[0008] A carrier, wherein a filter is disposed on the carrier, and a first guide member and a second guide member are disposed between the carrier and the bracket, so that the carrier can slide relative to the bracket along the optical axis; and

[0009] A driving mechanism, used for driving the carrier to move relative to the support;

[0010] Among them, the guide member 1 and the guide member 2 are arranged adjacent to each other, the guide member 1 includes at least two ball 1s, and the guide member 2 includes ball 2. In the plane where the ball 1 and the ball 2 are located, the ball 1 and the ball 2 form a triangular structure.

[0011] In the present invention, the driving mechanism drives the carrier to move relative to the bracket. Since the filter moves with the carrier, and the function of the filter is to select the required radiation band, reduce the light intensity, and make the image clearer, the image clarity can be adjusted in a targeted manner during the movement of the filter along the optical axis, thereby meeting the user's usage requirements; since the entire movement process is stabilized by the ball one and ball two in a triangular structure, the stability structure of the triangular mechanism can be used to prevent the carrier from shaking in a plane perpendicular to the optical axis in a plane parallel to the optical axis, thereby ensuring the movement stability of the carrier and ensuring the clarity quality of the image.

[0012] Preferably, the first guide member further comprises a first ball slideway disposed on the carrier or the bracket, and the first ball slideway has a first groove bottom; the second guide member further comprises a second ball slideway disposed on the carrier or the bracket, and the second ball slideway has a second groove bottom;

[0013] The groove bottom 1 carries two balls 1, and a plurality of balls 3 are arranged between the two balls 1, and the diameter of the balls 1 is larger than the diameter of the balls 3; or, a partition is arranged in the middle of the ball slide 1, and balls 1 are arranged on both sides of the partition respectively;

[0014] The second groove bottom carries the second ball, and the height of the second groove bottom is greater than the height of the first groove bottom.

[0015] In the present application, there are multiple ways to arrange the ball one and the ball two, all of which can meet the requirement that the ball one and the ball two are in a triangular structure in the plane where the two are located, and the structure is simple and easy to assemble.

[0016] Preferably, it includes a magnetic sheet and a magnet 2, one of which is arranged on a bracket, and the other is arranged on a carrier, and a magnetic force 1 is formed between the magnetic sheet and the magnet 2 to press ball 1 tightly into ball slide 1 and press ball 2 tightly into ball slide 2.

[0017] A magnetic force can be formed between the magnetic sheet and the magnet 2, and by pulling or pushing, the ball 1 and the ball 2 are respectively pressed against the ball slide 1 and the ball slide 2. Therefore, when the driving mechanism is in operation, the ball 1 always rolls along the side wall of the ball slide 1, and the ball 2 also always rolls along the side wall of the ball slide 2, thereby ensuring the movement stability of the carrier relative to the bracket, thereby ensuring the overall stability of the motor.

[0018] Preferably, the driving mechanism includes a magnet 1 and a coil 1, one of which is arranged on the bracket, and the other is arranged on the carrier, and the coil 1 is energized to form a magnetic force 2 with the magnet 1 to drive the carrier to move along the optical axis relative to the bracket.

[0019] The structure is simple and the carrier can be driven easily.

[0020] Preferably, the carrier is provided with a mounting groove for mounting a magnet.

[0021] The installation groove can realize the positioning installation of the magnet 1, which can greatly simplify the assembly process and improve the assembly efficiency.

[0022] Preferably, a glue dispensing groove 1 is provided on the carrier for injecting adhesive to bond the filter.

[0023] The setting of the glue dispensing slot one is conducive to quickly installing the filter on the carrier, which can greatly improve the motor assembly efficiency.

[0024] Preferably, it also includes:

[0025] Base; and

[0026] The housing, the bracket is connected to the inner side of the housing, the housing is connected to the base, and the carrier moves along the optical axis between the base and the housing;

[0027] Among them, a first circuit board is connected to a side of the base away from the shell; the shell and / or the bracket are provided with a limiting part 1 for limiting the first ball, and a limiting part 2 for limiting the second ball.

[0028] This structure can prevent the first ball and the second ball from deviating from the rolling path, thereby ensuring the movement stability of the carrier.

[0029] Preferably, at least one corner of the bracket is provided with a second glue dispensing groove for injecting adhesive to bond the shell.

[0030] The setting of the second glue dispensing groove is conducive to quickly fixing the bracket on the housing, which can greatly improve the motor assembly efficiency.

[0031] A camera module includes the ball closed-loop motor as described above.

[0032] An electronic device includes the camera module as described above.

[0033] Compared with the prior art, the present invention can improve the stability of motor use, and ensure the clarity of the captured image by arranging the balls one and two in a triangular structure, thereby greatly improving the customer experience. The structure is stable, firm, and pressure-resistant, so that the motor has the advantages of greater driving force and smoother sliding during movement, thereby making the overall accuracy of the motor higher. The present invention has a simple structure and is easy to assemble, and can greatly improve the overall assembly process efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1An exploded view of a ball closed-loop motor according to an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the partial structure of the ball closed-loop motor in an embodiment of the present invention;

[0036] Figure 3 Schematic diagram of the assembly of the bracket and the housing in an embodiment of the present invention;

[0037] Figure 4 for Figure 3 Exploded diagram of

[0038] Figure 5 Schematic diagram of a carrier in an embodiment of the present invention;

[0039] Figure 6 An exploded view of the assembly of the carrier and the bracket in an embodiment of the present invention;

[0040] Figure 7 FIG. 2 is a schematic diagram of another arrangement of ball 1 in an embodiment of the present invention.

[0041] In the figure: 1- bracket; 2- carrier; 3- lens; 4- filter; 5- ball one; 6- ball two; 7- base; 8- shell; 9- first circuit board; 10- limit part one; 11- limit part two; 12- ball slide one; 13- groove bottom one; 14- ball slide two; 15- groove bottom two; 16- ball three; 17- partition; 18- magnetic sheet; 19- magnet two; 20- magnet one; 21- coil one; 22- installation groove; 23- second circuit board; 24- glue dispensing groove one; 25- sinking groove; 26- glue dispensing groove two; 27- matching slide. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0043] like Figure 1 to Figure 6 As shown, a ball closed-loop motor comprises a bracket 1, a carrier 2 and a driving mechanism; a lens 3 is arranged on the bracket 1; a filter 4 is arranged on the carrier 2, and a guide member 1 and a guide member 2 are arranged between the carrier 2 and the bracket 1, so that the carrier 2 can slide relative to the bracket 1 along the optical axis; the driving mechanism is used to drive the carrier 2 to move relative to the bracket 1; the guide member 1 and the guide member 2 are arranged adjacent to each other, the guide member 1 includes at least two balls 1 5, the guide member 2 includes a ball 2 6, and in the plane where the balls 1 5 and the balls 2 6 are located, the balls 1 5 and the balls 2 6 form a triangular structure.

[0044] The lens 3 is mounted on the bracket 1, and the filter 4 is mounted on the carrier 2. The carrier 2 is driven by the driving mechanism to move along the optical axis, so that the distance between the lens 3 and the filter 4 is changed. Therefore, during the period of continuously adjusting the distance between the lens 3 and the filter 4, the picture clarity is adjusted. In this embodiment, an orthogonal coordinate system XYZ is established, the optical axis direction is the Z axis direction, and the XY plane is a plane perpendicular to the Z axis. In the XY plane, in the X axis direction or the Y axis direction, the triangular structure formed by the ball 1 5 and the ball 2 6 can be used to ensure the stability of the carrier 2. Further, in this embodiment, a base 7 and a shell 8 are also included; the bracket 1 is connected to the inner side of the shell 8, the shell 8 is connected to the base 7, and the carrier 2 moves along the optical axis between the base 7 and the shell 8; the base 7 is connected to a first circuit board 9 on the side away from the shell 8; the shell 8 and / or the bracket 1 are provided with a limiting portion 10 for limiting the ball 1 5, and a limiting portion 2 11 for limiting the ball 2 6. Specifically, the inner top wall of the housing 8 limits the position of the ball 1 5 and the ball 2 6. It is known that in order to ensure that the carrier 2 has a certain stroke in the Z-axis direction, generally speaking, there is a certain gap between the ball 1 5 and the housing 8, and between the ball 2 6 and the housing 8 to ensure that the stroke requirements are met, and the width of the gap is smaller than the diameter of the ball. Therefore, by limiting the position of the ball 1 5 and the ball 2 6, the rolling requirements of the ball can be well met, and the ball 1 5 or the ball 2 6 can be prevented from falling out of its corresponding installation position. The first circuit board 9 is used for external circuits and can energize the lens 3. The connection method of this structure is simple and has the advantages of reliability and stability.

[0045] like Figure 1 to Figure 3 , Figure 5 , Figure 6 As shown, in this embodiment, the guide member 1 also includes a ball slide 12 disposed on the carrier 2 or the bracket 1, and the ball slide 12 has a groove bottom 13; the guide member 2 also includes a ball slide 14 disposed on the carrier 2 or the bracket 1, and the ball slide 14 has a groove bottom 15. Specifically, the ball slide 12 in this embodiment is disposed on the carrier 2, and similarly, the ball slide 14 is disposed on the carrier 2. The bracket 1 may be provided with a corresponding matching slide 27. Of course, a plane may also be used to confine the balls in the slide. In order to further improve the stability, the XY plane cross-section of the ball slide 12 and the ball slide 2 14 is a triangular groove structure or an arc structure. In some technical solutions of this embodiment, the groove bottom 13 carries two balls 5, and a plurality of balls 3 16 are disposed between the two balls 5, and the diameter of the ball 1 5 is greater than the diameter of the ball 3 16. As Figure 2As shown, a third ball 16 is disposed between two first balls 5. At this time, a triangular structure is formed between the two first balls 5 and the second ball 6 in the plane of the X-axis direction, thereby ensuring the stable movement of the carrier 2 and thus ensuring the stability of the motor. Figure 7 In some other technical solutions, a partition 17 is provided in the middle of the ball slide 12, and balls 5 are provided on both sides of the partition 17. Ball grooves are provided on both sides of the partition 17, and balls 5 are placed in the ball grooves. At this time, the bottom of the lower ball groove is the bottom 13 of the groove, and this structure can also well meet the requirements of the triangular structure. Figure 2 As shown, in some technical solutions of this embodiment, the groove bottom 15 carries the ball 2 6, and the height of the groove bottom 15 is greater than the height of the groove bottom 13. In this embodiment, the number of ball 2 6 is one, and the groove bottom is used to raise the ball 2 6 relative to the carrier 2. As a preferred technical solution, in this embodiment, the groove bottom 13 carries two balls 1 5, and a ball 3 16 is arranged between the two balls 1 5, and the diameter of the ball 1 5 is greater than the diameter of the ball 3 16; the groove bottom 15 carries the ball 2 6, and the height of the groove bottom 15 is greater than the height of the groove bottom 13. In this technical solution, the number of balls is small, which can effectively avoid unnecessary costs; and the structure can maintain the guiding balance to ensure the stable operation of the motor. If the position of the ball 2 6 is low, it may cause the center of gravity of the entire structure to shift, affecting the balance and stability of the motor; and in the manufacturing process of the motor, there may be some tiny errors, which may affect the stability of the motor. Therefore, by raising the ball 2 6, these manufacturing errors can be compensated to make the triangular structure more precise and stable. In addition, by raising the ball 2 6, the direct contact area between the ball 2 6 and the carrier 2 / bracket 1 can also be reduced, thereby reducing friction and reducing abnormal noise. Smaller friction helps to improve imaging quality and reduce abnormal noise caused by shaking; after raising the ball 2 6, the support center of gravity changes, which is also conducive to better supporting the carrier 2 and ensuring that it remains stable during rolling. It should be noted that the above description describes the limiting form of the ball 1 5 and the ball 2 6 by the housing 8. In some other technical solutions of this embodiment, the housing 8 is provided with a limiting portion 10 for limiting the ball 1 5, and the carrier 2 is provided with a limiting portion 2 11 for limiting the ball 2 6. Figure 3 As shown, the limiting portion 10 is the inner top wall of the outer shell 8, and the structure of the limiting portion 2 11 is similar to the groove bottom 2 15, which is conducive to maintaining structural balance.

[0046] like Figure 1 and Figure 2As shown, in this embodiment, in order to further improve the rolling stability of ball 1 5 / ball 2 6, a magnetic sheet 18 and a magnet 2 19 are included, one of which is arranged on the bracket 1, and the other is arranged on the carrier 2, and a magnetic force 1 is formed between the magnetic sheet 18 and the magnet 2 19 to press the ball 1 5 tightly against the ball slide 1 12 and the ball 2 6 tightly against the ball slide 2 14. In this embodiment, the magnetic sheet 18 and the magnet 2 19 use the magnetic force of mutual attraction to keep the ball 1 5 tightly against the ball slide 1 12 and the ball 2 6 tightly against the ball slide 2 14, thereby avoiding the contact gap between the corresponding ball and the ball pipe, so as to make full use of the supporting rolling performance of the ball and effectively improve the use quality of the motor. Specifically, the magnetic sheet 18 is installed on the bracket 1, and the magnet 2 19 is arranged on the carrier 2. In some embodiments, in order to improve stability, a configuration block can be set on the opposite side of the magnet 2 19.

[0047] like Figure 1 , Figure 2 As shown, in this embodiment, the driving mechanism includes a magnet 20 and a coil 21, one of which is arranged on the bracket 1, and the other is arranged on the carrier 2. The coil 21 is energized to form a magnetic force 2 with the magnet 20 to drive the carrier 2 to move relative to the bracket 1 along the optical axis. Specifically, the carrier 2 is provided with a mounting groove 22 for mounting the magnet 20. The coil 21 is arranged on the bracket 1. In order to ensure the driving stability, a pair of magnets 20 and coils 21 are respectively arranged on the opposite sides of the motor. Since the carrier 2 has a mounting groove 22, the magnet 20 can be well fixed in the mounting groove 22 by dispensing glue in the mounting groove 22, thereby greatly simplifying the assembly process and improving the assembly efficiency. In this embodiment, a second circuit board 23 is provided on the bracket 1, and the second circuit board 23 is electrically connected to the first circuit board 9. When the first circuit board 9 is connected to an external circuit, the second circuit board 23 is powered and signaled. The coil 21 is provided on the second circuit board 23. Therefore, signal control can control the current of the coil 21, thereby controlling the magnitude of the magnetic force generated by the magnet 20, thereby better realizing the motion control of the carrier 2.

[0048] like Figure 5As shown, in this embodiment, the carrier 2 is provided with a glue dispensing groove 24 for injecting adhesive to bond the optical filter 4. Specifically, a sink 25 for installing the optical filter 4 is provided on the carrier 2, and the corner of the sink 25 is the glue dispensing groove 24. Therefore, after placing the optical filter 4 in the sink 25, the adhesive is directly injected into the glue dispensing groove 24, and the optical filter 4 can be well installed on the carrier 2. Therefore, after using the glue dispensing process, the first circuit board 9 can be better fixed in this embodiment to cope with the fixing requirements with high complexity and large movement range.

[0049] In this embodiment, at least one corner of the bracket 1 is provided with a glue dispensing groove 26 for injecting adhesive to bond the housing 8. Figure 4 As shown, when assembling the bracket 1, it is generally assembled along the Z axis. First, the adhesive is injected into the second dispensing groove 26, and then the bracket 1 is placed in the shell 8, and then baked and fixed. The installation is convenient and accurate.

[0050] Therefore, in this embodiment, after the lens 3 and the bracket 1 are fixed, they are bonded and fixed to the shell 8. The lens 3, the bracket 1, and the shell 8 are fixed by the method of dispensing glue respectively. Then the coil 1 21 and the magnet 1 20 are wound and installed around the carrier 2. This structure has higher precision and can save assembly manpower, process difficulty and reduce costs. One side of the base 7 is connected to the first circuit board 9, and the other side carries the carrier 2. Then the shell 8 and the base 7 are connected to complete the assembly. In this process, the ball 1 5 is placed in the ball slide 1 12, and the ball 2 6 is placed in the ball slide 2 14 to meet the requirement that the carrier 2 can slide stably relative to the bracket 1. The installation and matching of this structure is tighter, and the stability and reliability are better. Therefore, this embodiment can effectively reduce the contact between the carrier 2 and the first circuit board 9 in the production and installation steps of the conventional optical focus drive, and the loss is reduced due to the reduction of plastic parts, avoiding the wear and chipping problems caused by the friction between the conventional lens 3 structure and the plastic. Therefore, it can be known that in this embodiment, the driving mechanism and the first circuit board 9 are combined through the base 7, so in the manufacturing process, the difficulty and workload of each point are relatively simple, which can effectively reduce the cost.

[0051] Based on the above ball closed-loop motor, this embodiment further discloses a camera module, and the camera module is applied to electronic devices. The electronic device can be a mobile phone, a tablet computer, a laptop computer, a phone watch, a bracelet, etc. The camera module is configured in the electronic device, and collects light through the camera hole in the electronic device to achieve image capture.

[0052] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A ball closed-loop motor, characterized in that: include: A bracket, on which a lens is arranged; A carrier, wherein a filter is disposed on the carrier, and a first guide member and a second guide member are disposed between the carrier and the bracket, so that the carrier can slide relative to the bracket along the optical axis; as well as A driving mechanism, used for driving the carrier to move relative to the support; Among them, the guide member 1 and the guide member 2 are arranged adjacent to each other, the guide member 1 includes at least two ball 1s, and the guide member 2 includes ball 2. In the plane where the ball 1 and the ball 2 are located, the ball 1 and the ball 2 form a triangular structure.

2. A ball closed-loop motor as claimed in claim 1, characterized in that: The first guide member further includes a first ball slideway disposed on the carrier or the bracket, and the first ball slideway has a first groove bottom; the second guide member further includes a second ball slideway disposed on the carrier or the bracket, and the second ball slideway has a second groove bottom; The groove bottom 1 carries two balls 1, and a plurality of balls 3 are arranged between the two balls 1, and the diameter of the balls 1 is larger than the diameter of the balls 3; or, a partition is arranged in the middle of the ball slide 1, and balls 1 are arranged on both sides of the partition respectively; The second groove bottom carries the second ball, and the height of the second groove bottom is greater than the height of the first groove bottom.

3. A ball closed-loop motor as claimed in claim 2, characterized in that: It includes a magnetic sheet and a second magnet, wherein one of the magnetic sheet and the second magnet is arranged on a bracket, and the other is arranged on a carrier, and a magnetic force one is formed between the magnetic sheet and the second magnet to press the first ball into the first ball slide and press the second ball into the second ball slide.

4. A ball closed-loop motor as claimed in claim 1, characterized in that: The driving mechanism includes a magnet 1 and a coil 1, one of which is arranged on the bracket, and the other is arranged on the carrier. When the coil 1 is energized, it forms a magnetic force 2 with the magnet 1 to drive the carrier to move along the optical axis relative to the bracket.

5. A ball closed-loop motor as claimed in claim 4, characterized in that: The carrier is provided with a mounting groove for mounting a magnet.

6. A ball closed-loop motor as claimed in claim 1, characterized in that: The carrier is provided with a first glue dispensing groove for injecting adhesive to bond the filter.

7. A ball closed-loop motor as claimed in claim 1, characterized in that: Also includes: Base; as well as The housing, the bracket is connected to the inner side of the housing, the housing is connected to the base, and the carrier moves along the optical axis between the base and the housing; Among them, a first circuit board is connected to a side of the base away from the shell; the shell and / or the bracket are provided with a limiting part 1 for limiting the first ball, and a limiting part 2 for limiting the second ball.

8. A ball closed-loop motor as claimed in claim 7, characterized in that: At least one corner of the bracket is provided with a second glue dispensing groove for injecting adhesive to bond the shell.

9. A camera module, characterized in that: It comprises a ball closed-loop motor as described in any one of claims 1 to 8.

10. An electronic device, characterized in that Comprising the camera module as described in claim 9.

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