WO2021077469A1

WO2021077469A1 - Lifting camera module using small-tooth-difference involute planetary reducer

Info

Publication number: WO2021077469A1
Application number: PCT/CN2019/116224
Authority: WO
Inventors: 李志锋; 林岳崇; 李华京
Original assignee: 领先科技(东台)有限公司
Priority date: 2019-10-23
Filing date: 2019-11-07
Publication date: 2021-04-29
Also published as: CN110715031A

Abstract

Provided in the present disclosure is a lifting camera module using a small-tooth-difference involute planetary reducer, comprising a supporting frame. The supporting frame is provided with a camera module, a lifting assembly matched with the camera module, a motor driving the lifting assembly, and a small-tooth-difference involute planetary reducer; the small-tooth-difference involute planetary reducer comprises an eccentric shaft connected to the motor, at least one involute outer gear provided on the eccentric shaft, and an inner ring gear matched with the involute outer gear; the involute outer gear is connected to the lifting assembly by means of an output shaft; the motor may drive, by means of the small-tooth-difference involute planetary reducer, the lifting assembly to move, so that the camera module is raised or lowered. The present invention is simple and compact in structure, diverse in form, wide in application range, small in size, convenient to machine and manufacture, and large in transmission ratio range and transmission power, reduces the manufacturing cost, prolongs the service life, is high in stability and reliability, and improves the manufacturing yield rate and the mass production capacity of a product.

Description

Lifting camera module using small tooth difference involute planetary reducer

Technical field

The present disclosure relates to the technical field of camera lifting, and in particular to a lifting camera module using a small tooth difference involute planetary reducer.

Background technique

With the rapid development of technology, 3C electronic products have been widely used in people's work and life, especially in mobile terminal electronic devices such as mobile phones and tablet computers. 3C electronic products are computers, communications and consumer electronics. (ConsumerElectronic) Abbreviation for three types of electronic products. In order to cater to people’s consumer experience, high-screen-to-body ratio or full-screen technology has become the main development trend of these electronic devices. The high-screen-to-body ratio or full-screen The screen requirements of electronic devices are also getting higher and higher. However, because the under-screen integrated camera and other technologies are far from mature, the camera cannot penetrate the display to take pictures, so the front camera must be designed in an area outside the display. In order to achieve a full screen, the camera is often hidden on the back of the display. When taking a picture, the camera is extended, which is designed as a camera that can be raised and lowered. As an effective way to realize a full screen, a new wave of lifting camera technology has formed in recent years.

In the prior art, the lifting camera mainly includes manual pressing pop-up type, manual rotating type, variable speed motor automatic type, etc. The commonly used variable speed motor automatic type is convenient to operate, but the existing lifting camera transmission has certain defects in the design, and it is often used Gear sets with complex structures or worm gears, etc., have many parts, large design volume, and very high manufacturing accuracy requirements. It is necessary to ensure that the manufacturing of small parts is qualified, while ensuring that the entire mechanism can bear high torque and high speed, resulting in manufacturing costs High, low life, easy to wear, poor reliability, etc., resulting in low process yield of the transmission, difficult to mass production, etc., which limit the application and development of the lift camera.

Summary of the invention

In view of the above-mentioned problems existing in the existing lifting camera, the present disclosure proposes a lifting camera module using a small tooth difference involute planetary reducer.

In order to solve at least one of the above technical problems, the present disclosure proposes the following technical solutions:

A lifting camera module using a small tooth difference involute planetary reducer, comprising a support frame on which a camera module, a lifting component matched with the camera module, a motor for driving the lifting component, and a small tooth difference are arranged Involute planetary reducer, a small tooth difference involute planetary reducer includes an eccentric shaft connected with a motor, at least one involute external gear arranged on the eccentric shaft, and an internal gear ring matched with the involute external gear , The involute external gear is connected to the lifting assembly through the output shaft, and the motor can drive the lifting assembly to move through the involute planetary reducer with a small tooth difference to make the camera module go up and down.

The beneficial effects of the present disclosure are: the outer involute gear is used as a planetary gear, the outer involute gear and the inner ring gear have a certain number of teeth difference, the motor drives the eccentric shaft of the involute planetary reducer with a small tooth difference to rotate, and the eccentric shaft drives The involute external gear performs circular motion and the involute external gear is matched with the internal ring gear for deceleration transmission, that is, the involute external gear performs a compound movement of rotation and revolution, and at the same time, the involute external gear moves through the output shaft. The compound motion is transformed into stable fixed-axis rotation for output to move the lifting assembly, thereby controlling the camera module to perform the lifting motion, through the eccentric shaft, the involute external gear, the inner gear ring and the output shaft for planetary transmission with small tooth difference. The structure is simple, compact, diverse in form, wide application range, fewer parts, small size, light weight, convenient processing and manufacturing, large transmission ratio range and transmission power, stable operation, low noise, large carrying capacity, low energy loss, Good wear resistance, etc., thereby reducing manufacturing costs, extending service life, high stability and reliability, improving product yield and mass production capacity, and expanding product application and development.

In some embodiments, the small tooth difference involute planetary reducer further includes a housing, the inner gear ring is arranged in the housing, the eccentric shaft, the involute external gear and the output shaft are located in the housing, and the end of the housing away from the motor is provided with The first through hole corresponding to the output shaft.

In some embodiments, one end of the housing close to the motor is provided with a retainer that cooperates with the involute external gear, and a second through hole for the eccentric shaft to pass through is provided on the retainer.

In some embodiments, the housing is provided with a limit step cooperating with the outer involute gear, the limit step is located at the end of the inner gear ring away from the cage, and the outer involute gear and the inner gear ring are located between the cage and the limiter. Between the steps.

In some embodiments, the end of the involute external gear far from the motor is uniformly distributed with a plurality of pin shafts along its circumferential direction, and the end of the output shaft close to the involute external gear is provided with a chassis, and the diameter of the chassis is larger than that of the first through hole. Diameter: The chassis is provided with a plurality of pin holes corresponding to the plurality of pin shafts along the circumferential direction of the output shaft, and the center distance between the inner gear ring and the involute external gear is equal to the radius difference between the pin hole and the pin shaft.

In some embodiments, the eccentric shaft includes a first connecting part and an eccentric part in sequence, the first connecting part is coaxially connected with the drive shaft of the motor, and the involute external gear is arranged on the eccentric part.

In some embodiments, the first connecting portion is provided with a balance weight, the axis of the eccentric portion, the axis of the balance weight, and the axis of the first connecting portion are parallel and in the same plane, and the axis of the first connecting portion Located between the axis of the eccentric part and the axis of the balance weight.

In some embodiments, the lifting assembly includes a screw mechanism, a moving block arranged on the screw mechanism, and a guiding mechanism that cooperates with the moving block. The camera module has a first extension connected to the moving block, and the first extension is connected to the moving block. The extension part is slidably connected with the guide mechanism, and the output shaft is connected with the screw mechanism.

In some embodiments, the moving block is provided with a permanent magnet that is magnetically attached to the first extension to make the moving block and the first extension detachably connected.

In some embodiments, the lower end of the guide mechanism is provided with an elastic element for matching with the first extension part after separation of the moving block, and the moving block is provided with a buffer plate matching with the first extension part.

In addition, in the technical solutions of the present disclosure, unless otherwise specified, the technical solutions can be realized by using conventional means in the field.

Description of the drawings

In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

FIG. 1 is a first perspective view of a lifting camera module using a small tooth difference involute planetary reducer according to an embodiment of the disclosure.

2 is a second perspective view of a lifting camera module using a small tooth difference involute planetary reducer according to an embodiment of the disclosure.

Fig. 3 is an exploded view of a small tooth difference involute planetary reducer provided by an embodiment of the disclosure.

Fig. 4 is a perspective view of a small tooth difference involute planetary reducer provided by an embodiment of the disclosure.

Fig. 5 is a cross-sectional view of a small tooth difference involute planetary reducer provided by an embodiment of the disclosure.

Fig. 6 is a perspective view of a housing provided by an embodiment of the disclosure.

FIG. 7 is an assembly diagram of an eccentric shaft, an involute external gear, and an output shaft provided by an embodiment of the disclosure.

The reference numerals in the drawings illustrate, the small tooth difference involute planetary reducer 1, the housing 11, the inner ring gear 111, the first through hole 112, the limit step 113, the first groove 114, the second extension 115, eccentric Shaft 12, first connecting part 121, eccentric part 122, second connecting part 123, balance weight 124, first connecting hole 125, involute external gear 13, pin shaft 131, output shaft 14, chassis 141, pin hole 142 , Notch 143, boss 144, second connecting hole 145, third connecting hole 146, retainer 15, second through hole 151, flange 152, support frame 2, first channel 21, sealing ring 22, mounting hole 23 , Motor 3, camera module 4, first extension 41, third through hole 411, lifting assembly 5, screw mechanism 51, screw 511, guide mechanism 52, guide rod 521, moving block 53, fourth pass Hole 531, fifth through hole 532, permanent magnet 54, elastic element 55, buffer plate 56.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the following further describes the present disclosure in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are part of the embodiments of the present disclosure, rather than all of the embodiments, and are only used to explain the present disclosure, and are not used to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", The orientation or positional relationship indicated by "both ends" and "both sides" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the referred elements must have The specific orientation or the construction and operation in a specific orientation cannot be construed as a limitation of the present disclosure. In addition, the terms "first", "second", "upper", "lower", "primary", "secondary", etc. are only used for descriptive purposes, and can be simply used to distinguish different components more clearly, and It cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present disclosure can be understood in specific situations.

FIG. 1 is a first perspective view of a lifting camera module using a small-tooth difference involute planetary reducer according to an embodiment of the disclosure, and FIG. 2 is a first perspective view of a small-tooth difference involute planet provided by an embodiment of the disclosure The second perspective view of the lifting camera module of the reducer. FIG. 3 is an exploded view of the involute planetary reducer with a small tooth difference provided by an embodiment of the disclosure, and FIG. 4 is an involute planet with a small tooth difference provided by the embodiment of the disclosure The three-dimensional view of the reducer, FIG. 5 is a cross-sectional view of the involute planetary reducer provided by the embodiment of the disclosure, FIG. 6 is the perspective view of the housing provided by the embodiment of the disclosure, and FIG. 7 is the eccentric shaft provided by the embodiment of the disclosure , Assembly drawing of involute external gear and output shaft.

Examples:

As shown in Figures 1-7, a lifting camera module using a small-tooth difference involute planetary reducer includes a support frame 2. The support frame 2 is provided with a camera module 4 and a camera module 4 matched with the camera module 4 The lifting assembly 5 and the motor 3 for driving the lifting assembly 5 and the small tooth difference involute planetary reducer 1 are connected to the lifting assembly 5 through the small tooth difference involute planetary reducer 1. The small-tooth difference involute planetary reducer 1 includes an eccentric shaft 12 connected to the motor 3, at least one external involute gear 13 arranged on the eccentric shaft 12, and an internal ring gear 111 matched with the external involute gear 13 , The external involute gear 13 is connected to the lifting assembly 5 through the output shaft 14, and the motor 3 can drive the lifting assembly 5 through the small tooth difference involute planetary reducer 1 to move the camera module 4 up and down. Rising is the extension of the camera module 4, and the descending of the camera module 4 is the retracting or hiding of the camera module 4. The involute outer gear 13 is matched with the inner ring gear 111. The structure is compact and the output speed does not fluctuate. The transmission is stable, the transmission efficiency is high, the service life is long, and the application range is wide.

During use, the external involute gear 13 acts as a planetary gear. The external involute gear 13 and the ring gear 111 have a certain number of teeth difference. The motor 3 drives the eccentric shaft 12 of the involute planetary reducer 1 with a small tooth difference to rotate. , The eccentric shaft 12 drives the outer involute gear 13 to perform circular motion and makes the outer involute gear 13 cooperate with the inner ring gear 111 for reduction transmission, that is, the involute outer gear 13 performs a compound motion of rotation and revolution, and at the same time The involute external gear 13 converts the compound motion into a stable fixed-axis rotation for output through the output shaft 14 to make the lifting assembly 5 move, thereby controlling the camera module 4 to perform the lifting movement. Compared with the prior art, the present disclosure adopts a small tooth difference involute planetary reducer 1, which improves the output torque of the motor 3, and facilitates the adjustment of the movement of the lifting assembly 5 to better control the lifting speed of the camera module 4. The tooth difference involute planetary reducer 1 uses the eccentric shaft 12, the involute external gear 13, the inner gear ring 111 and the output shaft 14 to carry out a small tooth difference planetary transmission. The structure is simple, compact, diverse in form, and has a wide range of applications. Small quantity, small size, light weight, convenient processing and manufacturing, large transmission ratio range and transmission power, stable operation, low noise, large carrying capacity, low energy loss, good wear resistance, etc., thereby reducing manufacturing costs and extending The service life, stability and reliability are high, which improves the process yield and mass production capacity of the product, thereby expanding the application and development of the product.

The small tooth difference involute planetary reducer 1 also includes a housing 11, an inner ring gear 111 is arranged in the housing 11, the eccentric shaft 12, the involute external gear 13, and the output shaft 14 are located in the housing 11, and the housing 11 is far away from the motor 3 One end is provided with a first through hole 112 corresponding to the output shaft 14. The first through hole 112 facilitates the connection between the output shaft 14 and the lifting assembly 5. Generally, the ring gear 111 and the housing 11 are integrated, so that the structure is more stable and reliable. Furthermore, the end of the housing 11 away from the motor 3 is further provided with a second extension 115 that cooperates with the output shaft 14. The second extension 115 improves the stability of the output shaft 14 and is safer and more reliable. The housing 11 and the involute external gear 13 can be made of metal materials, engineering plastics, plastic alloys or other suitable materials, such as nylon, polyoxymethylene (POM) and other engineering plastics, with simple structure, easy production and processing, and long service life , Reduce production costs.

The end of the housing 11 close to the motor 3 is provided with a cage 15 that is matched with the involute external gear 13, that is, the cage 15 is installed at the entrance of the housing 11, and the outer diameter of the cage 15 is equal to the inner diameter of the housing 11. The frame 15 is provided with a second through hole 151 for the eccentric shaft 12 to pass through. During the assembly process, the eccentric shaft 12, the involute external gear 13 and the output shaft 14 are assembled and then installed into the housing 11, and then the cage 15 is inserted at the entrance of the housing 11, and the cage 15 can be connected to the outer involute One end of the gear 13 is in contact with each other, thereby confining the external involute gear 13 and the output shaft 14 in the housing 11, preventing the external involute gear 13 and the output shaft 14 from moving too much in the housing 11 and disrupting the assembly relationship, In addition, the eccentric shaft 12 can also be easily connected with the involute external gear 13 and the drive shaft of the motor 3 through the second through hole 151 on the holder 15, which is convenient to assemble, more stable and reliable.

The end of the cage 15 away from the involute external gear 13 is also provided with a flange 152. The housing 11 is provided with a first groove 114 that is matched with the flange 152. The cage 15 is inserted into the entrance of the housing 11 and the flange 152 is compressed in the first tank 114, so that the structure is more compact and stable, and the connection is more reliable. The cage 15 can be made of metal or plastic, and can be installed in the housing 11 in a tight fit, such as a transition fit or an interference fit. When the housing 11 and the cage 15 are both metal, a welding connection can also be adopted.

The housing 11 is provided with a limit step 113 that cooperates with the outer involute gear 13. The limit step 113 is located at the end of the inner gear 111 away from the cage 15, and the outer involute gear 13 and the inner gear 111 are located in the cage. Between 15 and the limit step 113, during use, the cage 15 and the limit step 113 can make the involute external gear 13 more stable in the casing, and ensure that the involute external gear 13 can move better. , Thereby improving the reliability of the product.

A plurality of pin shafts 131 are uniformly distributed along the circumferential direction of the end of the involute external gear 13 away from the motor 3, and a chassis 141 is provided on the end of the output shaft 14 close to the involute external gear 13, and the diameter of the chassis 141 is larger than the first through hole 112 and the diameter of the output shaft 14, the chassis 141 is located in the housing 11, the output shaft 14 is connected to the lifting assembly 5 through the first through hole 112, the chassis 141 is provided with a plurality of pin shafts 131 along the circumferential direction of the output shaft 14 Corresponding to a plurality of pin holes 142, the pin holes 142 correspond to the pin shaft 131 one-to-one, which can ensure the high structural strength of the involute external gear 13 and the output shaft 14, which is convenient for processing, and is especially suitable for smaller involutes. The number of external gear 13 and chassis 141, pin holes 142 and pin shafts 131 are determined according to the actual situation. The center distance between the inner ring gear 111 and the involute external gear 13 is equal to the radius difference between the pin hole 142 and the pin shaft 131, so The combined movement of the rotation and revolution of the involute external gear 13 can be converted into stable fixed-axis rotation for output. In addition, the pin hole 142 is also communicated with the outside along the radial direction of the output shaft 14 through the notch 143, that is, a groove is formed along the radial direction of the output shaft 14, so that processing is more convenient and a certain weight is reduced.

The eccentric shaft 12 sequentially includes a first connecting portion 121 and an eccentric portion 122. The first connecting portion 121 is coaxially connected with the drive shaft of the motor 3, and the first connecting portion 121 is provided with a first connecting hole connected with the drive shaft of the motor 3 125. The diameter of the first connecting portion 121 is usually larger than the diameter of the shaft hole of the involute external gear 13. The involute external gear 13 is sleeved on the eccentric portion 122, and one end of the involute external gear 13 can be connected to the first The parts 121 are pressed together, so as to better ensure the assembly accuracy of the eccentric shaft 12 and the involute external gear 13. In addition, the cross-section of the first connecting hole 125 may be non-circular or polygonal such as triangle, rectangle, D-shape, etc. The drive shaft of the motor 3 may be provided with a connecting portion matching the shape of the first connecting hole 125, so that the connecting portion and After the first connecting holes 125 are connected, they will not rotate in a circle, so the operation is more convenient, and the stability and reliability are better.

The first connecting portion 121 is provided with a balance weight 124. The axis of the eccentric portion 122, the axis of the balance weight 124, and the axis of the first connecting portion 121 are parallel and in the same plane. The axis of the first connecting portion 121 Located between the axis of the eccentric portion 122 and the axis of the balance weight 124, that is, the included angle between the axis of the eccentric portion 122 and the axis of the balance weight 124 is 180°. A certain centripetal force and inertial force will be generated during circular motion, so the centripetal force and inertial force can be balanced by setting the balance weight 124, which improves the carrying capacity of the product.

The end of the eccentric portion 122 away from the first connecting portion 121 may also be provided with a second connecting portion 123, and the chassis 141 is provided with a second connecting hole 145 that is matched with the second connecting portion 123. During use, when the motor 3 drives the eccentric shaft 12 to make a circular motion, the second connecting portion 123 rotates on a fixed axis in the second connecting hole 145, so that the second connecting portion 123 can bear a certain radial load during eccentric transmission. Thereby, the force exerted by the driving bearing of the motor 3 is shared, and the stability and reliability are higher. Generally, the diameter of the first connecting portion 121 is larger than the diameter of the shaft hole of the involute external gear 13, and the diameter of the second connecting portion 123 is smaller than the diameter of the eccentric portion 122, which facilitates assembly. Further, one end of the chassis 141 close to the external involute gear 13 is also provided with a boss 144 that matches with the external involute gear 13. The boss 144 is located in the interval enclosed by all the pin holes 142, and the second connection The hole 145 is arranged on the boss 144, so that the eccentric shaft 12 and the output shaft 14 can be better matched, which is more stable and reliable.

The lifting assembly 5 includes a screw mechanism 51 and a guide mechanism 52. The screw mechanism 51 is provided with a moving block 53. When the moving block 53 moves through the screw mechanism 51, the moving block 53 cooperates with the guide mechanism 52 and runs along the guide mechanism 52. For sliding, the camera module 4 has a first extension 41 connected to the moving block 53. The moving block 53 and the first extension 41 are preferably detachably connected, for example, a spring is used to make the moving block 53 and the first extension 41 41 is elastically connected, using friction posts and friction holes to frictionally connect the moving block 53 and the first extension 41, using a magnetic attraction connection or other suitable methods to enable the moving block 53 and the first extension 41 to be detachably connected , The first extension 41 is slidably connected with the guide mechanism 52, and the output shaft 14 of the involute planetary reducer 1 with a small tooth difference is coaxially connected with the screw mechanism 51. During use, when the external force impact received by the camera module 4 is greater than the connecting force between the moving block 53 and the first extension 41, the first extension 41 of the camera module 4 is separated from the moving block 53 and runs along The guiding mechanism 52 falls to realize the detachable connection of the camera module 4 and the lifting assembly 5, preventing the impact force from directly acting on the transmission component, effectively reducing the damage of the transmission component, thereby improving the impact resistance and stability of the product And reliability, long service life, high process yield and mass production capacity, simple structure, convenient processing and assembly, and low production cost. In addition, the screw mechanism 51 can also be replaced by other mechanisms capable of lifting the moving block 53 in the prior art.

The screw mechanism 51 includes a screw rod 511 coaxially connected with the output shaft 14 of the small tooth difference involute planetary reducer 1, the output shaft 14 is provided with a third connecting hole 146 connected with the screw rod 511, and the moving block 53 is connected to the The screw rod 511 is threadedly connected. The guide mechanism 52 includes a guide rod 521 arranged parallel to the screw rod. The moving block 53 is provided with a fourth through hole 531 that is slidably connected to the guide rod 521. The first extension 41 is provided with a guide rod 521. The third through hole 411 slidably connected by the rod 521 is usually provided with an avoiding through hole matching the screw rod 511 on the first extension 41, which has a simple structure, convenient processing and assembly, good stability and high reliability. In addition, the cross-section of the third connecting hole 146 may be non-circular or polygonal such as triangle, rectangle, D-shape, etc., and one end of the screw rod may be provided with a connecting part matching the shape of the third connecting hole 146, so that the connecting part and the third connecting hole 146 After the three connecting holes 146 are connected, they will not rotate in a circle, the connection is more convenient, and the stability and reliability are better.

The moving block 53 is provided with a permanent magnet 54 that is magnetically attached to the first extension 41, so that the moving block 53 and the first extension 41 are detachably connected, and the first extension 41 is made of magnetic material, The structure is simple, and the processing and assembly are convenient. Generally, the permanent magnet 54 refers to a magnet that can retain high remanence for a long time in an open circuit state. It is also called a hard magnet, such as magnetic steel, neodymium magnets, and ferrite permanent magnet materials. Permanent magnets, etc., are preferably magnetic steel. The magnetic steel has the characteristics of high hardness, high coercivity, high temperature resistance, and strong corrosion resistance. Its permanent magnet characteristics are better. After being saturated magnetized, after removing the external magnetic field It can still maintain strong and stable magnetism for a long time. During use, when the external force impact received by the camera module 4 is greater than the connecting force between the moving block 53 and the first extension 41, the first extension 41 of the camera module 4 is separated from the moving block 53 and runs along The guiding mechanism 52 falls to realize the detachable connection of the camera module 4 and the lifting assembly 5, preventing the impact force from directly acting on the transmission component, effectively reducing the damage of the transmission component, thereby improving the impact resistance and stability of the product And reliability, long service life, high process yield and mass production capacity. Furthermore, the movable block 53 is provided with a fifth through hole 532 for arranging the permanent magnet 54, and the permanent magnet 54 is fixedly installed in the fifth through hole 532, which is convenient to install, has a compact structure, and is more stable and reliable.

The lower end of the guide mechanism 52 is provided with an elastic element 55 for cooperating with the first extension 41 after the moving block 53 is separated. The elastic element 55 can be a spring, rubber or foam. The elastic element 55 can usually be a spring. It is sleeved on the guide rod, and the lower end of the spring is fixed on the support frame 2. The structure is simple, the processing and assembly are convenient, the stability is good, and the reliability is high. During use, when the external force impact received by the camera module 4 is greater than the connecting force between the moving block 53 and the first extension 41, the first extension 41 of the camera module 4 is separated from the moving block 53 and runs along After the guide mechanism 52 falls, the first extension 41 of the camera module 4 contacts the elastic element 55 at the lower end of the guide mechanism 52, and the elastic element 55 can transmit the impact force to the outside to play the role of buffer protection, and the buffer effect is good. , Thereby improving the stability and reliability of the product, and extending the service life of the product.

The moving block 53 is provided with a buffer plate that cooperates with the first extension 41. The buffer plate is located between the moving block 53 and the first extension 41. When the camera module 4 receives an external force impact greater than that of the moving block 53 and the first extension 41. When there is a magnetic attraction between the protrusions 41, the first protrusion 41 of the camera module 4 is separated from the moving block 53 and falls along the guide mechanism 52, and the first protrusion 41 of the camera module 4 and the guide mechanism 52 After the elastic element 55 at the lower end is in contact, the camera module 4 stops moving after being buffered and protected by the elastic element 55, and the screw mechanism 51 rotates to lower the moving block 53. When the moving block 53 drops to a certain position, it can interact with the first A protruding portion 41 is magnetically attached again. Since the moving block 53 and the first protruding portion 41 are magnetically attached again, a certain collision force will be generated, so the buffer plate can play a role of buffer protection, preventing the moving block 53 from connecting to the first extension. A protruding part 41 touches directly, which is safer and more reliable.

The material of the buffer plate 56 can be rubber, polyurethane or foam. Rubber has the advantages of good elasticity, high strength and low price. Polyurethane has high flexibility, resilience, mechanical strength and oxidation stability as well as excellent oil resistance. It has the advantages of flexibility, light weight, fast pressure-sensitive fixation, convenient use, free bending, ultra-thin volume, and reliable performance.

The support frame 2 may also be provided with a first channel 21 slidably connected to the camera module 4, the camera module 4 can be raised and lowered along the first channel 21 to extend and hide, and the exit of the first channel 21 may also be provided with The sealing ring 22 matched with the camera module 4 can prevent dust, water, etc. from entering through the sealing ring 22, which is safer and more reliable. The support frame 2 is also provided with a mounting hole 23 for fixed connection with other equipment. The number and location of 23 depends on the specific situation.

The above are only some embodiments of the present disclosure, which are only used to illustrate the technical solutions of the present disclosure, but not to limit it. It should be understood that, for those of ordinary skill in the art, without departing from the creative concept of the present disclosure Under the premise of, it can also be improved or replaced according to the above description, and all these improvements and replacements should belong to the protection scope of the appended claims of the present disclosure. In this case, all details can be replaced with equivalent elements, and materials, shapes and sizes can also be arbitrary.

Claims

A lifting camera module using a small tooth difference involute planetary reducer, which is characterized by comprising a support frame (2) on which a camera module (4) and the camera The lifting assembly (5) matched with the module (4), the motor (3) that drives the lifting assembly (5) and the involute planetary reducer (1) with a small tooth difference, the small tooth difference involute planet The reducer (1) includes an eccentric shaft (12) connected with the motor (3), at least one involute external gear (13) arranged on the eccentric shaft (12), and an external involute gear (13) connected to the motor (3). The inner ring gear (111) matched with the gear (13), the outer involute gear (13) is connected to the lifting assembly (5) through the output shaft (14), and the motor (3) passes through the gear The tooth difference involute planetary reducer (1) can drive the lifting assembly (5) to move so that the camera module (4) can be raised and lowered.
The lifting camera module using a small tooth difference involute planetary reducer according to claim 1, wherein the small tooth difference involute planetary reducer (1) further comprises a housing (11), The inner ring gear (111) is arranged in the housing (11), and the eccentric shaft (12), the involute external gear (13) and the output shaft (14) are located in the housing (11). In ), one end of the housing (11) away from the motor (3) is provided with a first through hole (112) corresponding to the output shaft (14).
The lifting camera module using a small tooth difference involute planetary reducer according to claim 2, wherein the end of the housing (11) close to the motor (3) is provided with the A cage (15) matched with an involute external gear (13), the cage (15) is provided with a second through hole (151) for the eccentric shaft (12) to pass through.
A lifting camera module using a small tooth difference involute planetary reducer according to claim 3, characterized in that, the housing (11) is provided with the outer involute gear (13) in phase. Cooperating limit step (113), the limit step (113) is located at the end of the inner ring gear (111) away from the cage (15), the outer involute gear (13) and the The inner gear ring (111) is located between the holder (15) and the limit step (113).
The lifting camera module using a small tooth difference involute planetary reducer according to claim 2, wherein the end of the involute external gear (13) away from the motor (3) runs along its A plurality of pin shafts (131) are evenly distributed in the circumferential direction. The output shaft (14) is provided with a chassis (141) at one end close to the involute external gear (13), and the diameter of the chassis (141) is larger than that of the output shaft (13). According to the diameter of the first through hole (112), the chassis (141) is provided with a plurality of pin holes ( 142), the center distance between the inner ring gear (111) and the involute external gear (13) is equal to the radius difference between the pin hole (142) and the pin shaft (131).
The lifting camera module using a small tooth difference involute planetary reducer according to claim 1, wherein the eccentric shaft (12) sequentially includes a first connecting portion (121) and an eccentric portion (122) ), the first connecting portion (121) is coaxially connected with the drive shaft of the motor (3), and the involute external gear (13) is arranged on the eccentric portion (122).
The lifting camera module using a small tooth difference involute planetary reducer according to claim 6, characterized in that a balance weight (124) is provided on the first connecting portion (121), and the eccentric The axis of the part (122), the axis of the balance weight (124) and the axis of the first connecting part (121) are parallel and in the same plane, and the axis of the first connecting part (121) The center is located between the axis of the eccentric part (122) and the axis of the balance weight (124).
According to any one of claims 1 to 7, a lifting camera module using a small tooth difference involute planetary reducer, wherein the lifting assembly (5) comprises a screw mechanism (51) , A moving block (53) provided on the screw mechanism (51) and a guiding mechanism (52) matched with the moving block (53), and the camera module (4) is provided with the moving block (53) The connected first extension (41), the first extension (41) is slidably connected with the guide mechanism (52), and the output shaft (14) is connected to the screw mechanism ( 51) Connect.
The lifting camera module using a small tooth difference involute planetary reducer according to claim 8, characterized in that the moving block (53) is provided with the first extension part (41) The connected permanent magnet (54) is magnetically attracted to make the movable block (53) and the first extension (41) detachably connected.
A lifting camera module using a small tooth difference involute planetary reducer according to claim 9, characterized in that the lower end of the guide mechanism (52) is provided for separating from the moving block (53) An elastic element (55) matched with the first extension (41), and a buffer plate (56) matched with the first extension (41) is provided on the moving block (53) .