Small-size anti-shake motor and industrial camera

Abstract

The utility model belongs to the technical field of image acquisition equipment, and discloses a small-size anti-shake motor, which comprises a base, a cover plate, a circuit board and a suspension plate, the cover plate is connected with the base, and the cover plate is provided with a photosensitive hole for exposing the image sensor; one side of the circuit board is used for installing an image sensor; the suspension plate comprises an outer plate and an inner plate, the outer plate and the inner plate are connected through a suspension wire, the outer plate is arranged between the base and the cover plate, and the inner plate is connected with the circuit board; a driving component is arranged between the base and the side, away from the image sensor, of the circuit board, and part or all of the driving component is located under the image sensor. According to the utility model, the thickness of the motor structure is reasonably utilized, and the motor structure is rearranged, so that the size in the length-width direction is reduced, and the actual use requirement is met. The utility model also discloses an industrial camera.

Description

Technical Field

[0001] The utility model belongs to the technical field of image acquisition equipment, and in particular relates to a small-size anti-shake motor and an industrial camera. Background Art

[0002] An image acquisition device is a device used to obtain image information. Generally, it has a relatively flat structure, so the size within the plane can be made larger. However, in some special cases, it is necessary to limit the area within the plane, so it needs to have a smaller size within the plane, which requires adjustment of the overall structure of the motor. Utility Model Content

[0003] In order to solve the above technical problems, the utility model discloses a small-sized anti-shake motor, rationally utilizes the thickness of the motor structure, re-arranges the motor structure to reduce the length and width dimensions to meet actual use requirements. The utility model also discloses an industrial camera having the small-sized anti-shake motor.

[0004] The specific technical solution of the utility model is as follows:

[0005] A small-size anti-shake motor, comprising:

[0006] Base;

[0007] A cover plate, the cover plate is connected to the base, and the cover plate is provided with a photosensitive hole for exposing the image sensor;

[0008] a circuit board, one side of the circuit board being used for mounting an image sensor; and

[0009] A suspension plate, the suspension plate comprising an outer plate and an inner plate, the outer plate and the inner plate being connected by suspension wires, the outer plate being arranged between the base and the cover plate, and the inner plate being connected to the circuit board;

[0010] Wherein, a driving component is arranged between the base and a side of the circuit board away from the image sensor, and a part or all of the driving component is located directly below the image sensor.

[0011] In conventional anti-shake motors, since the dimensions in the plane in the length and width directions can be larger, the driving component is usually arranged around the outside of the image sensor, so that the requirements for reasonable use of the plane dimensions can be met. However, for some special image acquisition devices, the requirements for the plane dimensions are higher, so it is necessary to minimize the radial projection area of ​​the motor. Therefore, when the driving component is arranged directly below the image sensor, the length and width dimensions can be reduced accordingly. For image acquisition devices with different structures, while reducing the plane dimensions of the motor, the dimensional requirements in the thickness direction are relatively low. Therefore, reasonable use of the thickness of the environment in which the motor is located can well meet the specific layout requirements.

[0012] Preferably, the driving member comprises:

[0013] a magnet, the magnet being disposed on the base; and

[0014] The driving coil is arranged on a side of the circuit board away from the image sensor, and the driving coil and the magnet are arranged correspondingly.

[0015] When jitter occurs, the drive coil is energized, which can attract or repel the magnet, thereby achieving the anti-shake requirement through displacement. After the drive coil is powered off, the circuit board is reset under the action of the suspension wire. The present application takes advantage of the thickness of the application environment and arranges the magnet and the drive coil below the image sensor, thereby meeting the requirement of effectively reducing the plane size.

[0016] Preferably, a planar guide member is provided between the circuit board and the base.

[0017] The arrangement of the planar guide member can limit the movement of the circuit board after the driving coil is energized, thereby improving the anti-shake effect.

[0018] Preferably, the planar guide member comprises a ball groove and a ball;

[0019] In the base and the circuit board, the ball groove is arranged in one of them, the ball is located in the ball groove and is in point contact with the other one.

[0020] The ball bearings can achieve self-rolling point contact, thereby meeting the requirements of planar motion on the basis of limiting motion in the direction of the optical axis.

[0021] Preferably, the base is provided with a truncated table protruding toward the cover plate, and the ball groove is provided on the truncated table.

[0022] The ball groove can provide an assembly position for the ball, and utilize the internal space of the motor to locate the self-rolling position of the ball, thereby achieving the practical purpose of use.

[0023] Preferably, the planar guide member is configured as a self-lubricating member;

[0024] The self-lubricating member is connected to one of the base and the circuit board, and is in planar contact with the other.

[0025] The self-lubricating part can limit the movement in a planar contact manner, and on this basis, avoid the occurrence of concave spots on the parts caused by the collision of balls.

[0026] Preferably, the circuit board is provided with a magnetic sheet on the same side as the driving coil, and the magnetic sheet and the magnet are provided correspondingly and attract each other.

[0027] Generally speaking, an anti-shake motor has a moving part and a fixed part. The moving part is usually suspended relative to the fixed part through the repulsive force between the magnetic sheet and the magnet, thereby reducing movement friction or avoiding movement interference when the induction coil is energized. As for the present application, since the plane size is reduced, it is not conducive to meeting the movement requirements through a suspension solution. Therefore, based on the structure of the present application, the circuit board cooperates with the plane guide mechanism based on its gravity, and the magnetic sheet is used to attract the magnet so that the circuit board can be close to the plane guide mechanism, thereby avoiding jitter causing the circuit board to jump, thereby avoiding unstable image acquisition causing substandard image quality.

[0028] Preferably, the image sensor has a first plug-in board, and the circuit board has a positioning portion and a second plug-in board;

[0029] The positioning portion cooperates with the first plug-in board so that the first plug-in board is electrically connected to the outside through the circuit board, so that the circuit is connected to the image sensor;

[0030] The second plug board is used for electrically connecting to the outside, and conducting the circuit to the circuit board through the suspension board.

[0031] The present application designs the power on and off of the image sensor and the circuit board separately, which can more conveniently realize the replacement or maintenance of the image sensor.

[0032] Preferably, the second plug plate is arranged on the base or the cover plate and is welded to the outer plate;

[0033] A positioning component is arranged between the base or the cover plate and the second plug plate.

[0034] The positioning component can realize the rapid installation of the second plug-in board, thereby realizing rapid welding and fixing.

[0035] An industrial camera including a small-sized image stabilization motor as described above.

[0036] Compared with the prior art, the utility model can achieve a small-size setting in a plane perpendicular to the optical axis, rationally utilize the thickness dimension in the direction perpendicular to the optical axis, achieve structural optimization, and realize the miniaturization of the anti-shake motor while ensuring the anti-shake performance. On this basis, the image sensor can be conveniently replaced or maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An exploded view of one direction of an embodiment of the utility model;

[0038] Figure 2 It is an exploded view of another direction of the embodiment of the utility model;

[0039] Figure 3 A top view of an embodiment of the utility model;

[0040] Figure 4 for Figure 3 JJ cross-section diagram;

[0041] Figure 5 for Figure 3 PP cross-section diagram;

[0042] Figure 6 It is a schematic diagram of another embodiment of the utility model.

[0043] In the figure: 1-base; 2-cover plate; 3-circuit board; 4-suspension plate; 5-image sensor; 6-photosensitive hole; 7-magnet; 8-driving coil; 9-ball; 10-round table; 11-magnetic sheet; 12-insertion board one; 13-positioning part; 14-insertion board two; 15-positioning bump. DETAILED DESCRIPTION

[0044] 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.

[0045] The small-sized anti-shake motor disclosed in this embodiment is applied to industrial cameras. Compared with traditional civilian cameras, it has high image stability, high transmission capability, high anti-interference capability, etc. Since the motor in the industrial camera has certain restrictions on the plane size perpendicular to the optical axis, the size along the optical axis can be relaxed, so the size along the optical axis can be reasonably used to re-layout the motor structure, so that the motor can be more reasonably applied to industrial cameras.

[0046] like Figure 1 to Figure 5As shown, a small-sized anti-shake motor includes a base 1, a cover plate 2, a circuit board 3 and a suspension plate 4; the cover plate 2 is connected to the base 1, and the cover plate 2 is provided with a photosensitive hole 6 for exposing an image sensor 5; one side of the circuit board 3 is used to install the image sensor 5; the suspension plate 4 includes an outer plate and an inner plate, the outer plate and the inner plate are connected by suspension wires, the outer plate is arranged between the base 1 and the cover plate 2, and the inner plate is connected to the circuit board 3; a driving component is arranged between the base 1 and the side of the circuit board 3 away from the image sensor 5, and a part of the driving component is located directly below the image sensor 5.

[0047] In this embodiment, a component assembly space is formed between the cover plate 2 and the base 1. That is, the driving component is located in the assembly space. Generally speaking, the driving component is arranged around the circumference of the image sensor 5, so it will occupy a larger plane size. Therefore, in this embodiment, the length and width dimensions are reduced, and in the plane perpendicular to the optical axis, the projection of the driving component and the projection of the image sensor 5 partially overlap, or completely overlap, so as to achieve the purpose of layout optimization.

[0048] In this embodiment, the driving member includes a magnet 7 and a driving coil 8; the magnet 7 is arranged on the base 1; the driving coil 8 is arranged on the side of the circuit board 3 away from the image sensor 5, and the driving coil 8 and the magnet 7 are arranged correspondingly. The base 1 has a magnet groove, and the magnet 7 is arranged in the magnet groove. It can be known that the magnet 7 and the driving coil 8 correspond to each other. By energizing the driving coil 8, on the basis of the driving coil 8 being arranged on the circuit board 3, the circuit board 3 can be carried to move due to the magnetic force, thereby realizing the displacement anti-shake of the image sensor 5 during the shaking process. In the structure of this embodiment, the driving coil 8 and the image sensor 5 are located on both sides of the circuit board 3. Therefore, based on the size of the circuit board 3, the position of the driving coil 8 can be reasonably arranged. By corresponding to the position of the driving coil 8, a corresponding groove is opened on the base 1 to place the magnet 7, thereby realizing the control of the plane size.

[0049] In this embodiment, a plane guide member is provided between the circuit board 3 and the base 1. Furthermore, the plane guide member includes a ball groove and a ball 9; in the base 1 and the circuit board 3, the ball groove is provided in one of them, the ball 9 is located in the ball groove, and is in point contact with the other. The base 1 is provided with a truncated cone 10 protruding toward the cover plate 2, and the ball groove is provided on the truncated cone 10. The inner diameter of the ball groove is slightly larger than the outer diameter of the ball 9, and the height of the ball groove is slightly smaller than the outer diameter of the ball 9. Therefore, when the ball 9 is assembled into the ball groove, one part of the ball 9 is located inside the truncated cone 10, and the other part is located outside the truncated cone 10, so as to achieve point contact with the circuit board 3 through this part. Therefore, in the direction of the optical axis, the ball 9 is used to achieve the limit in the direction of the optical axis, so as to improve the movement efficiency of the displacement anti-shake based on the point contact of the ball 9.

[0050] In the present embodiment, the circuit board 3 is provided with a magnetic sheet 11 on the same side as the driving coil 8. The magnetic sheet 11 and the magnet 7 are provided correspondingly and mutually attracted to the magnet 7. In the prior art, the mutual repulsion between the magnetic sheet 11 and the magnet 7 is generally used to realize the suspension of the circuit board 3. In this scheme, the ball 9 is generally set between the circuit board 3 and the cover plate 2. Therefore, after the circuit board 3 is suspended relative to the base 1, the circuit board 3 can be limited in the extension direction of the optical axis, so that the induction coil can only drive the circuit board 3 to move in the plane after power is turned on. Different from the prior art, the ball 9 in the present embodiment is located between the circuit board 3 and the base 1. During the initial installation process, the gravity of the circuit board 3 itself can be used to overlap the ball 9, so that the smoothness of the plane movement can be satisfied after the induction coil is powered on. However, in some jitters, During the process, the circuit board 3 may jump, that is, the circuit board 3 jumps up from the ball 9, so that a gap is generated between the circuit board 3 and the ball 9. In this case, the suspension wire needs to be used for reset. Although it can meet the anti-shake requirement, it will still affect the image quality of the image acquisition. Therefore, this embodiment uses the space in the thickness direction of the motor to configure the magnetic sheet 11 as a component that generates attraction with the magnet 7, and attaches the magnetic sheet 11 to the circuit board 3 on the same side as the drive coil 8, so that the circuit board 3 is always in contact with the ball 9 to avoid jumping caused by shaking, thereby better meeting the displacement anti-shake requirement, thereby better meeting the clarity requirement of image acquisition.

[0051] In some embodiments, the planar guide member is configured as a self-lubricating member; in the base 1 and the circuit board 3, the self-lubricating member is connected to one of them and is in planar contact with the other. The following is explained by the self-lubricating member being fixedly arranged on the base 1 and in planar contact with the circuit board 3. The self-lubricating member is made of a special material and has self-lubricating properties, such as polytetrafluoroethylene, graphite fluoride, molybdenum disulfide, graphite, etc., which can be selected according to actual needs. When the ball 9 is set, due to the mutual attraction between the magnetic sheet 11 and the magnet 7, a point collision may occur between the ball 9 and the circuit board 3. Therefore, during continuous use, the ball 9 will flush the circuit board 3 out of the concave point pit. In order to avoid such problems, in the above-mentioned technical solution using a self-lubricating member, one end of the self-lubricating member is configured as a plane, which contacts the circuit board 3 in a planar manner, thereby reducing the impact pressure, protecting the circuit board 3, and on the basis of the self-lubricating characteristics, ensuring smooth plane displacement of the circuit board 3.

[0052] In this embodiment, the image sensor 5 has a plug-in board 12, and the circuit board 3 has a positioning portion 13 and a plug-in board 2 14; the positioning portion 13 cooperates with the plug-in board 12 so that the plug-in board 12 passes through the circuit board 3 and is electrically connected to the outside, so that the circuit is connected to the image sensor 5; the plug-in board 2 14 is used to be electrically connected to the outside, and the circuit is connected to the circuit board 3 through the suspension board 4. After the plug-in board 12 is electrically connected to the outside, it can supply power to the image sensor 5 separately, and after the plug-in board 2 14 is electrically connected to the outside, it can supply power to the circuit board 3 separately, so as to realize the driving of the components on the circuit board 3. Therefore, this embodiment can conveniently realize the replacement or maintenance of the image sensor 5. It should be noted that the pins led out by different sensors are different. If the circuit board 3 and the image sensor 5 use the same plug-in board, the interface cannot be uniformly defined, so it will be inconvenient to replace the image sensor 5. Further, the plug-in board 2 14 is arranged on the base 1 or the cover plate 2 and is welded to the outer plate; a positioning member is arranged between the base 1 or the cover plate 2 and the plug-in board 2 14. Specifically, in this embodiment, the second plug plate 14 is pasted on the side of the base 1, and a positioning member is provided on the side of the base 1, and the positioning member is positioned as a positioning protrusion 15. It can be understood that the second plug plate 14 has a positioning circular hole that cooperates with the positioning protrusion 15. Therefore, during assembly, the second plug plate 14 and the base 1 are first positioned by the positioning member, and then the positioning and pasting can be achieved, thereby meeting the requirements of rapid assembly, and then the second plug plate 14 and the outer plate of the suspension plate 4 can be welded.

[0053] like Figure 6 As shown, in another embodiment, the difference from the above-mentioned embodiment is that all of the driving components are located directly below the image sensor 5. Such an arrangement can better reduce the length and width dimensions in the plane perpendicular to the optical axis, thereby better adapting to the assembly conditions of industrial cameras.

[0054] 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. 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 small-sized anti-shake motor, characterized in that: include: Base; A cover plate, the cover plate is connected to the base, and the cover plate is provided with a photosensitive hole for exposing the image sensor; A circuit board, one side of the circuit board is used for mounting an image sensor; as well as A suspension plate, the suspension plate comprising an outer plate and an inner plate, the outer plate and the inner plate being connected by suspension wires, the outer plate being arranged between the base and the cover plate, and the inner plate being connected to the circuit board; Wherein, a driving component is arranged between the base and a side of the circuit board away from the image sensor, and a part or all of the driving component is located directly below the image sensor.

2. A small-size anti-shake motor as claimed in claim 1, characterized in that: The driving member comprises: a magnet, the magnet being disposed on the base; and The driving coil is arranged on a side of the circuit board away from the image sensor, and the driving coil and the magnet are arranged correspondingly.

3. A small-sized anti-shake motor as claimed in claim 2, characterized in that: A plane guide component is arranged between the circuit board and the base.

4. A small-sized anti-shake motor as claimed in claim 3, characterized in that: The plane guide member includes a ball groove and a ball; In the base and the circuit board, the ball groove is arranged in one of them, the ball is located in the ball groove and is in point contact with the other one.

5. A small-sized anti-shake motor as claimed in claim 4, characterized in that: The base is provided with a round platform protruding toward the cover plate, and the ball groove is provided on the round platform.

6. The small-sized anti-shake motor according to claim 3, characterized in that: The planar guide member is configured as a self-lubricating member; The self-lubricating member is connected to one of the base and the circuit board, and is in planar contact with the other.

7. The small-sized anti-shake motor according to claim 3, characterized in that: The same side of the circuit board where the driving coil is arranged is also provided with a magnetic sheet, and the magnetic sheet and the magnet are arranged correspondingly and attract each other.

8. The small-sized anti-shake motor according to claim 1, characterized in that: The image sensor has a first plug-in board, and the circuit board has a positioning portion and a second plug-in board; The positioning portion cooperates with the first plug-in board so that the first plug-in board is electrically connected to the outside through the circuit board, so that the circuit is connected to the image sensor; The second plug board is used for electrically connecting to the outside, and conducting the circuit to the circuit board through the suspension board.

9. The small-sized anti-shake motor according to claim 8, characterized in that: The second plug plate is arranged on the base or the cover plate and is welded to the outer plate; A positioning component is arranged between the base or the cover plate and the second plug plate.

10. Industrial camera, characterized in that, It comprises a small-sized anti-shake motor as claimed in any one of claims 1 to 9.

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