Transmission nut, camera module and electronic equipment

Abstract

The utility model discloses a transmission nut, a camera module and electronic equipment, the transmission nut is applied to the camera module, the camera module is provided with a transmission screw, and the transmission nut is configured to be in transmission connection with the transmission screw. The transmission nut comprises a first end and a second end which are oppositely arranged in the first direction, a through hole penetrating from the first end to the second end is formed in the transmission nut, and an internal thread spirally arranged from the first end to the second end is arranged on the inner wall face of the through hole. The lead P of the internal threads ranges from 0.4 mm to 0.8 mm, and the tooth height H of the internal threads ranges from 0.1 mm to 0.5 mm. According to the transmission nut, the camera module and the electronic equipment, the transmission efficiency and the transmission precision can be improved while certain self-locking performance is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of imaging technology, in particular to a transmission nut, a camera module and an electronic device. BACKGROUND

[0002] At present, the lens of optical auto-focusing and optical anti-shake needs to be matched with a transmission screw rod and a transmission nut during use, and a driving device is usually used to drive the transmission screw rod to rotate, so that the transmission nut on the transmission screw rod and the lens move, and the lens is driven to change the optical performance. However, the transmission efficiency of the transmission nut used in the market at present is low, and the self-locking property is poor, which affects the transmission accuracy. CONTENT OF THE UTILITY MODEL

[0003] The present application discloses a transmission nut, a camera module and an electronic device, which can improve the transmission efficiency and transmission accuracy while having a certain self-locking property.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses a transmission nut, which is applied to a camera module, and a transmission screw rod is arranged on the camera module, and the transmission nut is configured to be in transmission connection with the transmission screw rod.

[0005] The transmission nut comprises a first end and a second end which are oppositely arranged along a first direction, and a through hole is arranged on the transmission nut and penetrates from the first end to the second end, and an inner thread is arranged on the inner wall surface of the through hole and spirally arranged from the first end to the second end.

[0006] The lead P of the inner thread is 0.4mm-0.8mm, and the tooth height H of the inner thread is 0.1mm-0.5mm.

[0007] As an optional implementation, in the embodiment of the first aspect of the present application, the helix angle φ of the inner thread is 5°-7°.

[0008] As an optional implementation, in the embodiment of the first aspect of the present application, the tooth profile of the inner thread is trapezoidal.

[0009] As an optional implementation, in the embodiment of the first aspect of the present application, the tooth profile angle α of the inner thread is 29°-30.5°.

[0010] As an optional implementation, in the embodiment of the first aspect of the present application, the yield strength of the transmission nut is greater than or equal to 1500MPa, and / or the material of the transmission nut is non-magnetic material.

[0011] As an optional implementation, in the embodiment of the first aspect of the present application, the single-side radial backlash L1 of the internal thread and the external thread of the transmission screw rod is 0.0125mm-0.0225mm; and / or,

[0012] The single-side axial backlash L2 of the internal thread and the external thread of the transmission screw rod is 0.003mm-0.006mm.

[0013] As an optional implementation, in the embodiment of the first aspect of the present application, the internal thread is a single-threaded thread.

[0014] In the second aspect, the present application further discloses a camera module, comprising a lens, a driving mechanism and the transmission nut of the first aspect, the lens is connected with the transmission nut, the driving mechanism comprises a driving member and a transmission screw rod connected to the driving member, the transmission screw rod is in transmission connection with the transmission nut, the driving member drives the transmission screw rod to rotate to drive the transmission nut to move, and in turn drives the lens to move.

[0015] As an optional implementation, in the embodiment of the second aspect of the present application, the number of the transmission nuts is multiple, and the starting point of the internal thread of each transmission nut has the same coordinate value relative to the coordinate point of the transmission nut where the starting point is located.

[0016] In the third aspect, the present application further discloses an electronic device, comprising a shell and the camera module of the second aspect, and the camera module is arranged in the shell.

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

[0018] This application provides a transmission nut, a camera module, and an electronic device. By controlling the lead of the internal thread of the transmission nut to be 0.4mm to 0.8mm, the transmission nut is less prone to rotation under external force, improving its self-locking ability. Furthermore, the lead of the internal thread is not too large, which would result in excessive stroke per revolution and excessive speed, leading to high transmission efficiency but low transmission accuracy. Conversely, the lead is not too small, which would result in excessively small stroke per revolution and excessively slow speed, leading to high transmission accuracy but low transmission efficiency. Therefore, limiting the lead of the transmission nut to a reasonable range ensures that the transmission efficiency and transmission accuracy meet the requirements. Simultaneously, by limiting the tooth height H of the internal thread to 0.1mm to 0.5mm, the contact area between the internal thread and the external thread is kept within a reasonable range, ensuring the transmission friction and transmitted torque, thus helping to meet the transmission efficiency requirements. Moreover, limiting the tooth height of the internal thread to a reasonable range ensures sufficient structural strength while saving design space for the transmission nut and facilitating the machining of the internal thread. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the camera module disclosed in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the transmission nut and transmission screw in the embodiment of this application;

[0022] Figure 3 These are cross-sectional views and partially enlarged schematic diagrams of the transmission nut and transmission screw assembly disclosed in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the transmission nut disclosed in the embodiments of this application;

[0024] Figure 5 This is a side view of the transmission nut disclosed in an embodiment of this application;

[0025] Figure 6 for Figure 5 Sectional view at point AA;

[0026] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0027] Figure 8 The structural schematic diagram of the electronic device disclosed in the embodiments of the present application is a mobile phone.

[0028] Label explanation:

[0029] 100, transmission nut; 10a, first end; 10b, second end; 10c, through hole; 10d, coordinate point; 101, internal thread; 102, starting point; P, lead; H, tooth height; φ, helix angle; α, tooth profile angle; L1, single-side radial backlash; L2, single-side axial backlash; X, first direction;

[0030] 200, camera module; 201, lens; 202, driving mechanism; 202a, driving piece; 202b, transmission screw; 300, electronic device; 301, shell. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0033] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those skilled in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0034] In addition, the terms "mount", "set", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0035] In addition, the terms "first", "second", and the like are mainly used to distinguish different devices, elements or components (the specific types and configurations can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "a plurality" is two or more.

[0036] The technical solutions of the present application will be further described below in conjunction with the embodiments and drawings.

[0037] Please refer to Figure 1 and Figure 2 The embodiment of the present application discloses a transmission nut 100, which can be applied to a camera module 200, and the camera module 200 is provided with a transmission screw rod, wherein the transmission nut is configured in transmission connection with the transmission screw rod.

[0038] Specifically, the camera module 200 includes a lens 201, a driving mechanism 202, and a transmission nut 100, the lens 201 is connected with the transmission nut 100, the driving mechanism 202 includes a driving member 202a and a transmission screw rod 202b connected to the driving member 202a, the transmission screw rod 202b is in transmission connection with the transmission nut 100, the driving member 202a drives the transmission screw rod 202b to rotate to drive the transmission nut 100 to move, and then drives the lens 201 to move.

[0039] For example, for optical zoom and autofocus lenses, the transmission nut 100 and the transmission screw rod 202b are used in cooperation during use, usually the driving member 202a drives the transmission screw rod 202b to rotate, so that the transmission nut 100 on the transmission screw rod 202b and the lens 201 connected to the transmission nut 100 are displaced, the transmission nut 100 converts the rotary motion of the transmission screw rod 202b into the linear motion required by the lens 201, so as to realize the change of the optical performance of the lens 201.

[0040] Optionally, the driving member 202a can be an AF (Auto Focus, automatic focusing) motor. Of course, in other embodiments, the driving member 202a can also be an anti-shake motor, which can be a voice coil motor, a stepping motor, etc. The appropriate driving member 202a can be selected according to actual needs, and the specific type of the driving member 202a is not specially limited in the embodiments of the present application.

[0041] In some embodiments, the camera module 200 can further include an image sensor (not shown). Wherein the lens 201 can include a lens barrel and at least one lens connected to the lens barrel, the lens is arranged along the optical axis direction relative to the image sensor. Understandably, when the lens moves along the optical axis direction relative to the image sensor, the distance between the lens and the image sensor changes, so that the light passing through the lens and entering the image sensor can present different imaging effects, for example, the long-short shooting mode and the macro shooting mode. Under the driving action of the driving mechanism 202, the distance between the lens 201 and the image sensor is different.

[0042] In some possible implementations, referring to Figure 3 The single-side radial backlash L1 of the internal thread 101 and the external thread of the transmission screw 202b is 0.0125mm-0.0225mm, and / or the single-side axial backlash L2 of the internal thread 101 and the external thread of the transmission screw 202b is 0.003mm-0.006mm.

[0043] It can be understood that when the transmission nut 100 and the transmission screw 202b are used, the internal thread 101 of the transmission nut 100 and the external thread of the transmission screw 202b are connected in cooperation, and then there is a cooperation gap between the threads of the two that cooperate with each other. The cooperation gap includes two gaps in the radial direction and the axial direction. That is, the radial backlash L1 refers to the cooperation gap of the internal thread 101 and the external thread of the transmission screw 202b in the radial direction of the transmission nut 100 (the direction perpendicular to the first direction X); the axial backlash L2 refers to the cooperation gap of the internal thread 101 and the external thread of the transmission screw 202b in the axial direction of the transmission nut 100 (the direction perpendicular to the first direction X).

[0044] It can be understood that in one example, the single-side radial backlash L1 of the internal thread 101 and the external thread of the transmission screw 202b is 0.0125mm-0.0225mm. For example, the single-side radial backlash L1 of the internal thread 101 and the external thread of the transmission screw 202b can be 0.015mm, 0.017mm or 0.02mm, etc.

[0045] In another example, the single-side axial backlash L2 of the internal thread 101 and the external thread of the transmission screw 202b is 0.003mm-0.006mm. For example, the single-side axial backlash L1 of the internal thread 101 and the external thread of the transmission screw 202b can be 0.004mm, 0.005mm or 0.006mm, etc.

[0046] In another example, the single-side radial backlash L1 of the internal thread 101 and the external thread of the transmission screw 202b is 0.0125mm-0.0225mm, and the single-side axial backlash L2 of the internal thread 101 and the external thread of the transmission screw 202b is 0.003mm-0.006mm.

[0047] If the backlash between the internal thread 101 and the external thread is too small, the friction between the transmission nut 100 and the transmission screw 202b will increase, which will affect the stability and efficiency of the transmission. If the backlash between the internal thread 101 and the external thread is too large, not only will it affect the reliability of the transmission connection, thereby affecting the smoothness of the operation, but it will also cause the transmission precision to decrease.

[0048] By reasonably controlling the fitting clearance between the internal thread of the transmission nut 100 and the external thread of the transmission screw 202b, the generation of excessive transmission clearance is avoided, which is conducive to ensuring the smoothness of the transmission movement of the two, increasing the smoothness of the zooming process of the lens 201, so that the lens 201 can move more accurately and stably, with higher precision, and thus the zooming effect of the camera module 200 is better. In addition, it can also ensure that the transmission nut 100 and the transmission screw 202b remain stable during the transmission operation, reduce the vibration caused by friction, and thus improve the stability of the optical performance of the entire camera module 200.

[0049] In the embodiments of the present application, referring to Figure 4 The transmission nut 100 includes a first end 10a and a second end 10b arranged opposite in the first direction X, a through hole 10c is formed in the transmission nut 100 and extends from the first end 10a to the second end 10b, and an internal thread 101 is arranged on the inner wall surface of the through hole 10c and spirally arranged from the first end 10a to the second end 10b. The internal thread 101 can be used in cooperation with the external thread on the transmission screw 202b.

[0050] In some possible embodiments, referring to Figure 5, the number of the transmission nuts 100 is multiple, and the starting point 102 of the internal thread 101 of each transmission nut 100 has the same coordinate value relative to the coordinate point 10d of the transmission nut 100 in which the starting point 102 is located. By limiting the starting point 102 of the internal thread 101 of each transmission nut 100 to have the same coordinate value relative to the coordinate point 10d of the transmission nut 100 in which the starting point 102 is located, that is, for multiple transmission nuts 100 in the camera module 200, the machining starting point needs to be consistent during the molding process, that is, the position where the internal thread 101 of each transmission nut 100 starts to form needs to be consistent, which has an important influence on the overall quality and performance of the thread. During the machining of the internal thread 101 of the transmission nut 100, the cutter needs to cut according to the predetermined path and parameters, so that the starting point of the internal thread 101 of each transmission nut 100 is consistent, which not only facilitates the automatic assembly of the transmission nut 100, but also ensures the machining quality and performance of the internal thread 101, thereby ensuring the axial position accuracy of the assembled transmission nut 100, and ensuring the accuracy and consistency of the movement of multiple transmission nuts 100 during simultaneous driving, thereby ensuring the accuracy of the movement of the lens 201.

[0051] For example, the number of transmission nuts 100 can be two, and the two transmission nuts 100 can be arranged on both sides of the lens 201. The two driving members 202a drive the transmission screw 202b to rotate respectively to drive the transmission nut 100 to move linearly, thereby driving the movement of the lens 201.

[0052] In some embodiments, referring to Figure 6 and Figure 7 , the lead P of the internal thread 101 is 0.4mm-0.8mm. Alternatively, the lead P of the internal thread 101 can be 0.4mm-0.5mm, 0.4mm-0.6mm, or 0.5mm-0.7mm, etc. For example, the lead P of the internal thread 101 can be 0.45mm, 0.5mm, or 0.55mm, etc. By limiting the lead P of the internal thread 101 of the transmission nut 100 within a reasonable range, when the transmission nut 100 is used with the transmission screw 202b, the transmission nut 100 is not easy to rotate even if it is subjected to external force in a non-transmission state, which can make the transmission nut 100 have sufficient self-locking ability, and is conducive to improving the use reliability of the transmission nut 100.

[0053] If the lead of the internal thread 101 is too large, the transmission nut 100 will have too large a stroke and too fast a transmission speed when the transmission nut 100 is used in cooperation with the transmission screw 202b, although the transmission efficiency can be improved, the transmission precision can be reduced, and the optical performance stability of the lens 201 is not conducive. If the lead of the internal thread 101 is too small, the transmission nut 100 will have too small a stroke and too slow a transmission speed when the transmission nut 100 is used in cooperation with the transmission screw 202b, although the transmission precision can be improved, the transmission efficiency can be reduced, and the focusing effect of the camera module 200 is not conducive. Therefore, by limiting the lead of the transmission nut 100 to a reasonable range, the transmission nut 100 can also consider the characteristics of transmission efficiency and transmission precision, and can ensure the movement accuracy of the lens 201, which is conducive to the optical performance stability of the camera module 200 as a whole, and also conducive to the focusing effect of the camera module 200.

[0054] Preferably, the lead P of the internal thread 101 can be 0.5 mm, so that the transmission effect of the transmission nut 100 is better.

[0055] In some embodiments, the tooth height H of the internal thread 101 is 0.1 mm to 0.5 mm. Alternatively, the tooth height H of the internal thread 101 can be 0.1 mm to 0.4 mm, 0.1 mm to 0.3 mm, or 0.1 mm to 0.2 mm, etc. For example, the tooth height H of the internal thread 101 can be 0.16 mm, 0.17 mm, or 0.2 mm, etc. By limiting the tooth height H of the internal thread 101 of the transmission nut 100 to a reasonable range, the contact area of the internal thread 101 when cooperating with the external thread can be within a reasonable range, thereby ensuring the friction of the transmission and the torque transmitted, thereby facilitating the demand for transmission efficiency, and by limiting the tooth height of the internal thread 101 within a reasonable range, the internal thread 101 has sufficient structural strength while facilitating the design space of the transmission nut 100, and more conducive to the processing and molding of the internal thread of the transmission nut 100.

[0056] If the tooth height H of the internal thread 101 is too large, the contact surface between the transmission nut 100 and the transmission screw 202b will be increased, the wear degree of the internal thread 101 and the external thread will be increased, thereby reducing the service life of the transmission nut 100 and failing to ensure the transmission precision; if the tooth height H of the internal thread 101 is too small, the strength of the internal thread 101 will be affected, thereby affecting the structural stability of the transmission nut 100.

[0057] Preferably, the tooth height H of the internal thread 101 can be 0.16 mm, so that the transmission nut 100 can meet the characteristics of transmission stability and structural strength at the same time.

[0058] In some embodiments, the inner thread 101 of the transmission nut 100 satisfies the lead P of 0.4mm-0.8mm and the tooth height H of 0.1mm-0.5mm at the same time, so that the inner thread 101 of the transmission nut 100 has sufficient structural strength, and the transmission nut 100 and the transmission screw 202b can further maintain the transmission accuracy and transmission efficiency, and improve the stability and reliability of the optical performance of the entire camera module 200.

[0059] In some possible embodiments, the helix angle φ of the inner thread 101 is 5°-7°. Optionally, the helix angle φ of the inner thread 101 can be 5°-6°, 6°-7°, or 5.5°-6.5°, etc. Optionally, the helix angle φ of the inner thread 101 can be 5°, 6°, 6.27°, 6.5°, or 7°, etc.

[0060] By controlling the inner thread 101 to have a smaller thread angle, the friction will increase when stressed, and the transmission nut 100 is not easy to move by itself, so that the inner thread 101 has better self-locking performance, and the self-locking performance of the transmission nut 100 is further improved.

[0061] Preferably, the helix angle φ of the inner thread 101 can be 6.27°, which can make the self-locking performance of the transmission nut 100 better.

[0062] In some possible embodiments, the tooth profile of the inner thread 101 is trapezoidal. That is, the cross-sectional shape of the inner thread 101 of the transmission nut 100 is trapezoidal, and the trapezoidal design enhances the carrying capacity of the inner thread 101 and optimizes the transmission efficiency. In addition, the trapezoidal thread has a larger contact area, can efficiently transmit large torque and axial force, and can make the stress distribution more uniform, so that the transmission nut 100 is not easy to loosen and break during transmission, and the stability and reliability of the transmission are ensured.

[0063] It can be understood that when the thread profile angle is too large, the slope of the thread increases, and the increase in the slope makes the thread more susceptible to the influence of the axial force and loosens, thereby affecting the self-locking performance, but the increase in the slope reduces the friction of the thread, thereby improving the transmission efficiency and increasing the transmission efficiency. Based on this, in order to make the transmission nut 100 more suitable for transmission movement, in some possible embodiments, the tooth profile angle α of the inner thread 101 is 29°-30.5°. For example, the tooth profile angle α of the inner thread 101 can be 29°, 29.5°, or 30°, etc. By limiting the tooth profile angle α of the inner thread 101 of the transmission nut 100 within a reasonable range, the transmission nut 100 can be more suitable for transmission movement, and the strength of the inner thread 101 can be ensured.

[0064] Preferably, the thread angle a of the internal thread 101 can be 30°, which can ensure better stability and accuracy of the transmission nut 100 during transmission.

[0065] At present, the transmission nut 100 used in the camera module 200 is usually made of plastic, which is easy to be damaged during the mutual action of the transmission nut 100 and the metal transmission screw 202b, resulting in that the lens 201 cannot be used and needs to be replaced frequently.

[0066] In order to improve the structural reliability of the transmission nut 100, in some possible embodiments, the yield strength of the transmission nut 100 is greater than or equal to 1500 MPa. In this way, the structural strength of the transmission nut 100 can be ensured, and the reliability of the mutual action of the transmission nut 100 and the transmission screw 202b can be effectively ensured, and the wear degree of the transmission nut 100 is reduced, thereby improving the service life of the transmission nut 100.

[0067] In some possible embodiments, the material of the transmission nut 100 can be a non-magnetic material. The non-magnetic transmission nut 100 does not generate or conduct a magnetic field, thereby reducing electromagnetic interference and ensuring stable operation of the camera module 200.

[0068] Alternatively, the material of the transmission nut 100 can be carbon steel, stainless steel, brass or other metal materials, which can ensure the reliability of the transmission between the transmission nut 100 and the transmission screw 202b, and is not easy to be damaged, and has good wear resistance, thereby being more conducive to ensuring the service life of the transmission nut 100.

[0069] In some possible embodiments, the internal thread 101 is a single thread. By using the single-thread transmission nut 100, the transmission nut 100 is not easy to slide during use, and the friction between the transmission nut 100 and the transmission screw 202b is large, and has good self-locking ability.

[0070] The application also discloses an electronic device 300, which comprises a shell 301 and the camera module 200 as described above, and the camera module 200 is arranged on the shell 301. The electronic device 300 can include but is not limited to a mobile phone, a tablet computer, a notebook computer, a smart watch, a vehicle-mounted device, a drone, a monitor and the like. Please refer to Figure 8 Taking the electronic device 300 as a mobile phone as an example, the camera module 200 can be arranged on the shell 301.

[0071] It can be understood that the electronic device 300 with the camera module 200 has all the technical effects of the transmission nut 100. That is, the transmission nut 100 in the camera module 200 of the electronic device 300 can have certain self-locking while improving transmission efficiency and transmission accuracy, so that the performance of the auto-focusing or optical image stabilization of the camera module 200 is better, thereby facilitating the improvement of the performance of the electronic device 300. Since the above technical effects have been described in detail in the embodiments of the transmission nut 100, they will not be described here.

[0072] The transmission nut, the camera module and the electronic device disclosed in the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the transmission nut, the camera module and the electronic device and the core idea thereof; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A transmission nut (100), characterized in that, The transmission nut (100) is applied to the camera module (200), which is provided with a transmission screw (202b), and the transmission nut (100) is configured to be connected to the transmission screw (202b) in a transmission manner; The transmission nut (100) includes a first end (10a) and a second end (10b) arranged opposite to each other along a first direction (X). The transmission nut (100) has a through hole (10c) extending from the first end (10a) to the second end (10b). The inner wall of the through hole (10c) is provided with an internal thread (101) spirally arranged from the first end (10a) to the second end (10b). The lead P of the internal thread (101) is 0.4mm to 0.8mm, and the tooth height H of the internal thread (101) is 0.1mm to 0.5mm.

2. The transmission nut (100) according to claim 1, characterized in that, The helix angle of the internal thread (101) The range is 5° to 7°.

3. The transmission nut (100) according to claim 1, characterized in that, The internal thread (101) has a trapezoidal tooth profile.

4. The transmission nut (100) according to claim 3, characterized in that, The tooth angle α of the internal thread (101) is 29° to 30.5°.

5. The transmission nut (100) according to any one of claims 1-4, characterized in that, The yield strength of the transmission nut (100) is greater than or equal to 1500 MPa, and / or the material of the transmission nut (100) is a non-magnetic material.

6. The transmission nut (100) according to any one of claims 1-4, characterized in that, The single-sided radial back clearance L1 between the internal thread (101) and the external thread of the transmission screw (202b) is 0.0125mm to 0.0225mm; and / or, The axial back clearance L2 between the internal thread (101) and the external thread of the transmission screw (202b) is 0.003mm to 0.006mm.

7. The transmission nut (100) according to any one of claims 1-4, characterized in that, The internal thread (101) is a single-thread thread.

8. A camera module (200), characterized in that, The device includes a lens (201), a drive mechanism (202), and a transmission nut (100) as described in any one of claims 1-7. The lens (201) is connected to the transmission nut (100). The drive mechanism (202) includes a drive member (202a) and a transmission screw (202b) connected to the drive member (202a). The transmission screw (202b) is drively connected to the transmission nut (100). The drive member (202a) drives the transmission screw (202b) to rotate so as to drive the transmission nut (100) to move, thereby driving the lens (201) to move.

9. The camera module (200) according to claim 8, characterized in that, There are multiple transmission nuts (100). The center of the through hole (10c) of each transmission nut (100) is taken as the coordinate point (10d). The starting point (102) of the internal thread (101) of each transmission nut (100) has the same coordinate value relative to the coordinate point (10d) of the transmission nut (100) to which it is located.

10. An electronic device (300), characterized in that, It includes a housing (301) and a camera module (200) as described in claim 9, wherein the camera module (200) is disposed in the housing (301).

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