Camera module and electronic equipment

Abstract

The utility model relates to a camera module and electronic equipment, the camera module comprises a base, a carrier, a lens and a piezoelectric driving unit, the lens is connected with the carrier, the carrier is movably connected with the base along the extension direction of an optical axis, and the carrier is provided with a friction surface parallel to the optical axis; the piezoelectric driving unit comprises a piezoelectric part and a driving part, the piezoelectric part can stretch out and draw back in the extension direction of the optical axis, the two ends of the piezoelectric part are connected with the base and the driving part respectively, and the driving part makes contact with the friction surface. According to the camera module disclosed by the invention, under the condition that the moving stroke of the piezoelectric driving unit is relatively short, the lens is intermittently driven for multiple times to move along the extension direction of the optical axis, so that the adjustment of different distances of the focal length of the lens can be realized, and the focusing convenience of the camera module is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a camera module and an electronic equipment. Background Art

[0002] In order to better meet the shooting needs of users, the focal length of the camera module lens is getting longer and longer, and the corresponding focusing stroke of the camera module is also getting longer and longer. In order to reduce the focusing stroke of the camera module, the solution of reducing the focusing distance of the camera module is generally adopted, for example, the close focus distance is adjusted to 15cm, which brings inconvenience to focusing at close distances. Utility Model Content

[0003] The present disclosure provides a camera module to improve the focusing convenience of the camera module.

[0004] The camera module disclosed in the present invention includes a base, a carrier, a lens and a piezoelectric driving unit, wherein the lens is connected to the carrier, and the carrier is movably connected to the base along the extension direction of the optical axis, and the carrier has a friction surface parallel to the optical axis; the piezoelectric driving unit includes a piezoelectric part and a driving part, the piezoelectric part is retractable along the extension direction of the optical axis, the two ends of the piezoelectric part are respectively connected to the base and the driving part, and the driving part is in contact with the friction surface.

[0005] Optionally, the driving portion is provided with a friction protrusion protruding toward the friction surface, and the friction protrusion is in contact with the friction surface.

[0006] Optionally, the friction protrusion includes an arcuate surface, and the arcuate surface contacts the friction surface.

[0007] Optionally, the piezoelectric drive unit is arranged on the outside of the carrier, and the outer side surface of the carrier forms the friction surface.

[0008] Optionally, the base is provided with a first guide portion, and the carrier is provided with a second guide portion, and the second guide portion is movably matched with the first guide portion along the extension direction of the optical axis.

[0009] Optionally, the first guide portion is a guide rod extending along the extension direction of the optical axis, the second guide portion is a guide hole extending along the extension direction of the optical axis, and the guide rod is slidably matched with the guide hole along the extension direction of the optical axis.

[0010] Optionally, the camera module further includes a bracket, the carrier is arranged between the base and the bracket in the extension direction of the optical axis, and both ends of the guide rod are respectively connected to the base and the bracket.

[0011] Optionally, the friction surface and the second guide portion are arranged on opposite sides of the carrier.

[0012] Optionally, a first limiting portion is provided on a side of the base facing the carrier, and a second limiting portion is provided on a side of the carrier facing the base, and the second limiting portion is used to cooperate with the first limiting portion in limiting manner.

[0013] Optionally, the first limiting portion includes a first limiting protrusion protruding toward the carrier, and the second limiting portion includes a second limiting protrusion protruding toward the base.

[0014] Optionally, the camera module also includes a bracket, and the carrier is arranged between the base and the bracket in the extension direction of the optical axis; a third limiting portion is provided on the side of the bracket facing the carrier, and a fourth limiting portion is provided on the side of the carrier facing the bracket, and the fourth limiting portion is used to cooperate with the third limiting portion.

[0015] Optionally, the third limiting portion includes a third limiting protrusion protruding toward the carrier, and the fourth limiting portion includes a fourth limiting protrusion protruding toward the base.

[0016] Optionally, the base is provided with a positioning groove, and one end of the piezoelectric part facing away from the driving part is inserted into the positioning groove.

[0017] Optionally, the draft angle of the positioning groove is greater than or equal to 5°.

[0018] The present disclosure also provides an electronic device.

[0019] The electronic device disclosed in the present invention includes the camera module described in any one of the above items.

[0020] When the camera module disclosed in the present invention is focused, the piezoelectric part of the piezoelectric drive unit is supplied with a driving voltage in the first direction. Based on the inverse piezoelectric effect, the piezoelectric part will extend or shorten along the extension direction of the optical axis. The driving part is in contact with the friction surface, so that friction is generated between the driving part and the friction surface, and the carrier is driven to move along the extension direction of the optical axis under the action of the friction force. The lens is connected to the carrier, thereby driving the lens to move along the extension direction of the optical axis; then the piezoelectric part of the piezoelectric drive unit is quickly powered off or quickly supplied with a driving voltage in the second direction. Based on the inverse piezoelectric effect, the piezoelectric part will quickly shorten or lengthen along the extension direction of the optical axis. Under the action of the inertial force, the position of the carrier remains unchanged. Repeating the above steps can make the lens intermittently move along the extension direction of the optical axis, thereby achieving focusing. Therefore, in the case where the moving stroke of the piezoelectric drive unit is short, by repeatedly intermittently driving the lens to move along the extension direction of the optical axis, the adjustment of different distances of the lens focal length can be achieved, thereby improving the focusing convenience of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a stereoscopic diagram of a camera module according to an embodiment of the present disclosure.

[0022] Figure 2 1. The figure is a top view of a camera module according to an embodiment of the present disclosure.

[0023] Figure 3 yes Figure 2 AA view.

[0024] Figure 4 This is a schematic diagram of the principle of focusing achieved by a camera module according to an embodiment of the present disclosure.

[0025] Figure 5 This is an exploded view of a camera module of one embodiment of the present disclosure with the shell hidden.

[0026] Figure 6 yes Figure 5 Schematic diagram of the structure of the medium voltage electric drive unit.

[0027] Figure 7 yes Figure 5 Schematic diagram of the structure of the middle base.

[0028] Figure 8 yes Figure 5 Schematic diagram of the structure of the vector.

[0029] Fig. 9 yes Figure 5 Schematic diagram of the structure of the middle bracket.

[0030] Fig.10 This is a stereoscopic image of a camera module of one embodiment of the present disclosure from one viewing angle after the shell is hidden.

[0031] Fig.11 This is a stereoscopic image of a camera module of an embodiment of the present disclosure from another perspective with the shell hidden.

[0032] Reference numerals:

[0033] 100. Camera module;

[0034] 1. base; 11. first positioning hole; 12. first limiting portion; 13. positioning groove; 14. base through hole;

[0035] 2. carrier; 21. friction surface; 22. guide protrusion; 221. guide hole; 23. second limiting portion; 24. fourth limiting portion; 25. carrier through hole;

[0036] 3. Lens;

[0037] 4. Piezoelectric drive unit; 41. Piezoelectric part; 42. Drive part; 421. Friction protrusion; 4211. Arc surface;

[0038] 5. Guide rod;

[0039] 6. Bracket; 61. Second positioning hole; 62. Third limiting portion; 63. Bracket through hole;

[0040] 7. Shell; 71. Shell through hole. DETAILED DESCRIPTION

[0041] Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, but should not be understood as limiting the present disclosure.

[0042] like Figures 1 to 3 As shown, the camera module 100 of the embodiment of the present disclosure includes a base 1, a carrier 2, a lens 3 and a piezoelectric drive unit 4, wherein the lens 3 is connected to the carrier 2, and the carrier 2 is movably connected to the base 1 along the extension direction of the optical axis. The piezoelectric drive unit 4 includes a piezoelectric portion 41 and a drive portion 42, and the piezoelectric portion 41 is retractable along the extension direction of the optical axis. The two ends of the piezoelectric portion 41 are respectively connected to the base 1 and the drive portion 42, and the carrier 2 has a friction surface 21 parallel to the optical axis, and the drive portion 42 is in contact with the friction surface 21. Among them, the carrier 2 and the lens 3 can be bonded.

[0043] The piezoelectric portion 41 may include one or more piezoelectric ceramic sheets. When there are multiple piezoelectric ceramic sheets, the multiple piezoelectric ceramic sheets are stacked in sequence along the extension direction of the optical axis.

[0044] Among them, the driving mode of the piezoelectric drive unit 4 is piezoelectric stick-slip drive, also called inertial stick-slip drive. Specifically, the piezoelectric ceramic is controlled to deform at a relatively small speed, so that static friction is generated between the driving part 42 and the friction surface 21, so that the piezoelectric part 41 drives the carrier 2 to move when it is stretched and deformed; the acceleration generated by the rapid deformation of the piezoelectric ceramic is controlled, so that dynamic friction is generated between the driving part 42 and the friction surface 21, so that the carrier 2 remains in its original position when the piezoelectric part 41 is stretched and deformed.

[0045] When the camera module 100 of the disclosed embodiment is focusing, the piezoelectric part 41 of the piezoelectric drive unit 4 is supplied with a driving voltage in the first direction. Based on the inverse piezoelectric effect, the piezoelectric part 41 will extend or shorten along the extension direction of the optical axis. The driving part 42 is in contact with the friction surface 21, so that friction is generated between the driving part 42 and the friction surface 21, and the carrier 2 is driven to move along the extension direction of the optical axis under the action of the friction force. The lens 3 is connected to the carrier 2, thereby driving the lens 3 to move along the extension direction of the optical axis; then, the piezoelectric part 41 of the piezoelectric drive unit 4 is quickly powered off or quickly supplied with a driving voltage in the second direction. Based on the inverse piezoelectric effect, the piezoelectric part 41 will shorten or lengthen rapidly along the extension direction of the optical axis. Under the action of the inertial force, the position of the carrier 2 remains unchanged. Repeating the above steps can make the lens 3 intermittently move along the extension direction of the optical axis, thereby achieving focusing. Therefore, when the moving stroke of the piezoelectric drive unit 4 is short, the focal length of the lens 3 can be adjusted to different distances by intermittently driving the lens 3 to move along the extension direction of the optical axis multiple times, thereby improving the focusing convenience of the camera module 100.

[0046] In addition, the piezoelectric drive unit 4 has no electromagnetic structure, will not generate electromagnetic interference, and will not interfere with the AF (Automatic Focus) and OIS (Optical Image Stabilization) functions of the camera module 100. The driving force of the piezoelectric drive unit 4 is large and is not prone to jamming. The piezoelectric drive unit 4 has a fast response speed and high control accuracy. The piezoelectric drive unit 4 has a power-off self-locking function, which is conducive to reducing the power consumption of the camera module 100.

[0047] For example, Figure 4 As shown, in the initial state, the driving part 42 of the piezoelectric driving unit 4 is in contact with the friction surface 21 of the carrier 2 (as shown in Figure a); then, a positive driving voltage is applied to the piezoelectric part 41, and based on the inverse piezoelectric effect, the piezoelectric part 41 will extend L along the extension direction of the optical axis (as shown in Figure b), and the driving part 42 is in contact with the friction surface 21, so that a friction force is generated between the driving part 42 and the friction surface 21, and the carrier 2 is driven to move along the extension direction of the optical axis under the action of the friction force, and the lens 3 is connected to the carrier 2, thereby driving the lens 3 to move along the extension direction of the optical axis; then, the piezoelectric part 41 is quickly powered off or a negative driving voltage is quickly applied to the piezoelectric part 41, and based on the inverse piezoelectric effect, the piezoelectric part 41 will quickly shorten along the extension direction of the optical axis (as shown in Figure c), and under the action of the inertial force, the position of the carrier 2 remains unchanged. Repeating the above steps can make the lens 3 intermittently move in the direction away from the base 1, thereby achieving focusing. Alternatively, a negative driving voltage may be applied to the piezoelectric portion 41 first, and then the piezoelectric portion 41 is quickly powered off or a positive driving voltage is quickly applied to the piezoelectric portion 41, and this step may be repeated to allow the lens 3 to intermittently move toward the base 1 to achieve focusing.

[0048] It is understandable that when the driving part 42 is in surface contact with the friction surface 21, the friction force between the piezoelectric driving unit 4 and the carrier 2 is greater, and it is easier to drive the carrier 2 to move along the optical axis. However, it is difficult to ensure that the driving part 42 and the friction surface 21 are in contact everywhere with the existing processing technology, that is, the driving part 42 and the friction surface 21 can only be partially in contact. If the driving part 42 is set to be in surface contact with the friction surface 21, the contact position of the driving part 42 and the friction surface 21 is difficult to determine, which affects the driving stability of the piezoelectric driving unit 4 on the carrier 2.

[0049] In some embodiments, Figure 3 and Figure 5 As shown, the driving portion 42 is provided with a friction protrusion 421 protruding toward the friction surface 21 , and the friction protrusion 421 is in contact with the friction surface 21 .

[0050] By providing the friction protrusion 421 on the driving part 42 , the friction protrusion 421 can always keep in contact with the friction surface 21 , thereby improving the driving stability of the piezoelectric driving unit 4 on the carrier 2 and improving the movement stability of the lens 3 during the focusing process of the camera module 100 .

[0051] Alternatively, if Figure 3 , Figure 5 and Figure 6 As shown, the friction protrusion 421 includes an arcuate surface 4211 , and the arcuate surface 4211 contacts the friction surface 21 .

[0052] The arc surface 4211 may be a spherical surface, an ellipsoidal surface, a semi-cylindrical surface, etc. When the arc surface 4211 is a spherical surface or an ellipsoidal surface, the arc surface 4211 and the friction surface 21 are in point contact. When the arc surface 4211 is a semi-cylindrical surface, the arc surface 4211 and the friction surface 21 are in line contact.

[0053] By utilizing the arc surface 4211 to contact the friction surface 21, not only can the stress concentration phenomenon of the friction protrusion 421 be reduced and the structural strength of the friction protrusion 421 be improved; it can also prevent the friction protrusion 421 from scratching the friction surface 21 when moving relative to the friction surface 21, thereby improving the reliability of the camera module 100.

[0054] In some embodiments, Figure 3 and Fig.11 As shown, the piezoelectric drive unit 4 is arranged on the outside of the carrier 2, and the outer side surface of the carrier 2 forms a friction surface 21. Figure 3 shown.

[0055] Herein, inward can be understood as: a direction adjacent to the optical axis on a plane perpendicular to the optical axis; outward can be understood as: a direction away from the optical axis on a plane perpendicular to the optical axis.

[0056] By using the outer side surface of the carrier 2 as the friction surface 21, on the one hand, additional processing of the friction surface 21 on the carrier 2 can be avoided, which is beneficial to reducing the cost of the camera module 100; on the other hand, there are usually no other components on the outside of the carrier 2 that interfere with the piezoelectric drive unit 4, which can ensure that the piezoelectric drive unit 4 has sufficient space for expansion and contraction, facilitating the arrangement of the piezoelectric drive unit 4.

[0057] In some embodiments, Figure 5 and Figure 7 As shown, the base 1 is provided with a positioning groove 13 , and the piezoelectric part 41 is inserted into the positioning groove 13 with its back facing the driving part 42 .

[0058] The end of the piezoelectric part 41 facing away from the driving part 42 may be connected to the bottom wall of the positioning groove 13. For example, the end of the piezoelectric part 41 facing away from the driving part 42 is bonded to the bottom wall of the positioning groove 13.

[0059] By providing a positioning groove 13 on the base 1, when installing the piezoelectric drive unit 4, the end of the piezoelectric part 41 facing away from the drive part 42 can be inserted into the positioning groove 13 first, and the positioning groove 13 can be used to pre-position the piezoelectric drive unit 4, thereby facilitating the installation and fixation of the piezoelectric drive unit 4, which is beneficial to improving the assembly efficiency of the camera module 100 and further reducing the cost of the camera module 100.

[0060] In order to make the technical solution of the present disclosure easier to understand, the technical solution of the present disclosure is further described below by taking the optical axis extending in the up-down direction as an example. Figure 1 , Figure 3 , Figure 5 , Figures 6 to 11 shown.

[0061] For example, the base 1 is disposed on the lower side of the carrier 2, and the notch of the positioning groove 13 faces upward. The piezoelectric part 41 is disposed on the lower side of the driving part 42, and the lower end of the piezoelectric part 41 is inserted into the positioning groove 13. The piezoelectric driving unit 4 drives the carrier 2 to move in the up and down direction to achieve the focusing of the lens 3.

[0062] Optionally, the draft angle of the positioning groove 13 is greater than or equal to 5°.

[0063] For example, the notch of the positioning groove 13 faces upward, and the demolding direction of the positioning groove 13 also faces upward.

[0064] It is understandable that when the piezoelectric part 41 is deformed by expansion and contraction, it may interfere with the groove side wall of the positioning groove 13, affecting the focus of the camera module 100. By setting the draft angle of the positioning groove 13 to be greater than or equal to 5°, it is possible to avoid the piezoelectric part 41 from interfering with the groove side wall of the positioning groove 13 when it is deformed by expansion and contraction, which is beneficial to improving the reliability of the camera module 100.

[0065] In some embodiments, the base 1 is provided with a first guide portion, and the carrier 2 is provided with a second guide portion, and the second guide portion is movably matched with the first guide portion along the extension direction of the optical axis.

[0066] By utilizing the cooperation between the second guide portion and the first guide portion, the moving direction of the carrier 2 can be guided and limited, thereby preventing the moving direction of the carrier 2 from deviating, and further improving the reliability of the camera module 100.

[0067] Alternatively, if Figure 3 As shown, the friction surface 21 and the second guide portion are arranged on opposite sides of the carrier 2 .

[0068] For example, Figure 8 As shown, the carrier 2 is in the shape of a cube, and the carrier 2 is provided with a carrier through hole 25 for light to pass through. Figure 3 and Fig.11 As shown, the friction surface 21 and the second guide portion are respectively arranged on opposite sides of the carrier 2 .

[0069] By arranging the friction surface 21 and the second guide portion on opposite sides of the carrier 2 , it is possible to prevent the carrier 2 from deflecting during movement along the extension direction of the optical axis, which is beneficial to further improve the reliability of the camera module 100 .

[0070] Alternatively, if Figure 3 , Figure 5 , Figure 8 , Fig.10 and Fig.11 As shown, the first guide portion is a guide rod 5 extending along the extension direction of the optical axis, and the second guide portion is a guide hole 221 extending along the extension direction of the optical axis. The guide rod 5 is slidably matched with the guide hole 221 along the extension direction of the optical axis.

[0071] By setting the first guide part as the guide rod 5 and the second guide part as the guide hole 221 , the structures of the first guide part and the second guide part are simplified, which facilitates the processing and manufacturing of the camera module 100 and helps to further reduce the cost of the camera module 100 .

[0072] Of course, in other embodiments, one of the first guide portion and the second guide portion can be configured as a slide groove, and the other can be configured as a slider, and the slider is slidably matched with the slider in the extension direction of the optical axis.

[0073] Alternatively, if Figure 5 , Figure 8 and Fig.10 As shown, the carrier 2 is provided with a guide protrusion 22 protruding in a direction away from the friction surface 21 , and the guide hole 221 is provided in the guide protrusion 22 .

[0074] It is understandable that if the guide hole 221 is directly opened on the carrier 2, the structural strength of the carrier 2 will be affected, thereby affecting the reliability of the camera module 100. By providing the guide protrusion 22 on the carrier 2 and providing the guide hole 221 on the guide protrusion 22, it is possible to avoid the guide hole 221 affecting the structural strength of the carrier 2, thereby improving the reliability of the camera module 100.

[0075] Alternatively, if Figure 5 , Figure 8 and Fig.10 As shown, there are multiple guide rods 5 and multiple guide holes 221 , and the guide rods 5 correspond to the guide holes 221 one by one, and each guide rod 5 cooperates with the corresponding guide hole 221 .

[0076] For example, Figure 5 and Fig.10 As shown, the number of the guide rods 5 and the number of the guide holes 221 are both two.

[0077] Alternatively, if Figure 3 , Figure 4 , and 10 and Fig.11 As shown, the camera module 100 further includes a bracket 6 , the carrier 2 is disposed between the base 1 and the bracket 6 in the extension direction of the optical axis, and both ends of the guide rod 5 are connected to the base 1 and the bracket 6 respectively.

[0078] For example, Figure 7 As shown, the base 1 is provided with a first positioning hole 11. Fig. 9 As shown, the bracket 6 is provided with a second positioning hole 61, one end of the guide rod 5 is inserted into the first positioning hole 11 and has an interference fit with the first positioning hole 11, thereby realizing the connection between the guide rod 5 and the base 1; the other end of the guide rod 5 is inserted into the second positioning hole 61 and has an interference fit with the second positioning hole 61, thereby realizing the connection between the guide rod 5 and the bracket 6.

[0079] By connecting the two ends of the guide rod 5 to the base 1 and the bracket 6 respectively, the connection reliability of the guide rod 5 can be improved, which is beneficial to further improve the reliability of the camera module 100.

[0080] In some embodiments, Figure 3 , Figure 5 , Figure 7 and Fig.11 As shown, a first limiting portion 12 is provided on a side of the base 1 facing the carrier 2 , and a second limiting portion 23 is provided on a side of the carrier 2 facing the base 1 . The second limiting portion 23 is used to cooperate with the first limiting portion 12 .

[0081] For example, Figure 3 and Figure 5As shown, the upper side of the base 1 is provided with a first limiting portion 12, and the lower side of the carrier 2 is provided with a second limiting portion 23. When the carrier 2 moves downward, the second limiting portion 23 cooperates with the first limiting portion 12 to prevent the carrier 2 from moving further downward.

[0082] The second limiting portion 23 cooperates with the first limiting portion 12 to limit the extreme position of the carrier 2 moving toward the base 1 .

[0083] Alternatively, if Figure 3 , Figure 5 , Figure 7 and Fig.11 As shown, the first limiting portion 12 is a first limiting protrusion protruding toward the carrier 2 , and the second limiting portion 23 is a second limiting protrusion protruding toward the base 1 .

[0084] By setting the first limiting portion 12 as the first limiting protrusion and the second limiting portion 23 as the second limiting protrusion, the structures of the first limiting portion 12 and the second limiting portion 23 are simplified, which facilitates the processing and manufacturing of the camera module 100 and helps to further reduce the cost of the camera module 100.

[0085] Optionally, there are multiple first limiting portions 12 and multiple second limiting portions 23 , and the multiple second limiting portions 23 are evenly spaced along the circumference of the carrier 2 , and the first limiting portions 12 correspond to the second limiting portions 23 one by one.

[0086] For example, Figure 7 As shown, the base 1 is in a square plate shape, and a base through hole 14 is provided on the base 1 for light to pass through, and a first limit portion 12 is arranged on the upper surface of the base 1. There are four first limit portions 12, and the four first limit portions 12 are arranged at the four corners of the base 1 respectively.

[0087] By providing a plurality of the first limiting portion 12 and the second limiting portion 23 , the limiting reliability between the second limiting portion 23 and the first limiting portion 12 can be improved, and the reliability of the camera module 100 can be further improved.

[0088] Alternatively, if Figure 3 , Figure 5 , Figure 8 , Fig. 9 and Fig.11 As shown, a third limiting portion 62 is provided on the side of the bracket 6 facing the carrier 2 , and a fourth limiting portion 24 is provided on the side of the carrier 2 facing the bracket 6 . The fourth limiting portion 24 is used to cooperate with the third limiting portion 62 .

[0089] For example, Figure 3 , Figure 5 , Figure 8 and Fig. 9As shown, the lower side of the bracket 6 is provided with a third limiting portion 62, and the upper side of the carrier 2 is provided with a fourth limiting portion 24. When the carrier 2 moves upward, the fourth limiting portion 24 cooperates with the third limiting portion 62 to prevent the carrier 2 from moving upward further.

[0090] The fourth limiting portion 24 cooperates with the third limiting portion 62 to limit the extreme position of the carrier 2 moving toward the bracket 6 .

[0091] Alternatively, if Figure 8 and Fig. 9 As shown, the third limiting portion 62 includes a third limiting protrusion protruding toward the carrier 2 , and the fourth limiting portion 24 includes a fourth limiting protrusion protruding toward the base 1 .

[0092] By setting the third limiting portion 62 as the third limiting protrusion and the fourth limiting portion 24 as the fourth limiting protrusion, the structures of the third limiting portion 62 and the fourth limiting portion 24 are simplified, which facilitates the processing and manufacturing of the camera module 100 and helps to further reduce the cost of the camera module 100.

[0093] Optionally, there are multiple third limiting portions 62 and multiple fourth limiting portions 24 , and the multiple fourth limiting portions 24 are evenly spaced along the circumference of the carrier 2 , and the third limiting portions 62 correspond to the fourth limiting portions 24 one by one.

[0094] For example, Fig. 9 As shown, the bracket 6 is in a square plate shape, and a bracket through hole 63 is provided on the bracket 6 for light to pass through, and a third limiting portion 62 is arranged on the lower surface of the bracket 6. There are four third limiting portions 62, and the four third limiting portions 62 are arranged at the four corners of the bracket 6 respectively.

[0095] By providing a plurality of the third limiting portion 62 and the fourth limiting portion 24 , the limiting reliability between the fourth limiting portion 24 and the third limiting portion 62 can be improved, and the reliability of the camera module 100 can be further improved.

[0096] like Figures 1 to 3 As shown, the camera module 100 further includes a housing 7, the housing 7 is provided with a housing through hole 71, the housing 7 is connected to the base 1, the housing 7 and the base 1 form a receiving cavity, the carrier 2, the piezoelectric drive unit 4, the guide rod 5 and the bracket 6 are all arranged in the receiving cavity. A part of the lens 3 is arranged in the receiving cavity, and the other part of the lens 3 is suspended out of the receiving cavity through the housing through hole 71.

[0097] The shell 7 and the base 1 can be bonded together.

[0098] The number of the piezoelectric drive unit 4 in the embodiment of the present disclosure is one. In other embodiments, the number of the piezoelectric drive unit 4 may also be two, three, or more than three.

[0099] The electronic device of the embodiment of the present disclosure includes the camera module 100 described in any of the above embodiments. The electronic device may be a mobile phone, a tablet computer, a laptop computer, etc.

[0100] The electronic device of the disclosed embodiment has the advantages of small size, etc.

[0101] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present disclosure. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present disclosure.

Claims

1. A camera module, characterized in that: include: Base; A carrier and a lens, wherein the lens is connected to the carrier, the carrier is movably connected to the base along the extension direction of the optical axis, and the carrier has a friction surface parallel to the optical axis; The piezoelectric driving unit comprises a piezoelectric part and a driving part, the piezoelectric part is retractable along the extension direction of the optical axis, two ends of the piezoelectric part are respectively connected to the base and the driving part, and the driving part contacts the friction surface.

2. The camera module according to claim 1, characterized in that: The driving part is provided with a friction protrusion protruding toward the friction surface, and the friction protrusion is in contact with the friction surface.

3. The camera module according to claim 2, characterized in that: The friction protrusion includes an arcuate surface, and the arcuate surface contacts the friction surface.

4. The camera module according to claim 1, characterized in that: The piezoelectric driving unit is arranged on the outer side of the carrier, and the outer side surface of the carrier forms the friction surface.

5. The camera module according to claim 1, characterized in that: The base is provided with a first guide portion, and the carrier is provided with a second guide portion, and the second guide portion is movably matched with the first guide portion along the extension direction of the optical axis.

6. The camera module according to claim 5, characterized in that: The first guide portion is a guide rod extending along the extension direction of the optical axis, the second guide portion is a guide hole extending along the extension direction of the optical axis, and the guide rod is slidably matched with the guide hole along the extension direction of the optical axis.

7. The camera module according to claim 6, characterized in that: The camera module also includes a bracket, the carrier is arranged between the base and the bracket in the extension direction of the optical axis, and the two ends of the guide rod are respectively connected to the base and the bracket.

8. The camera module according to claim 5, characterized in that: The friction surface and the second guide portion are arranged on two opposite sides of the carrier.

9. The camera module according to claim 1, characterized in that: A first limiting portion is provided on a side of the base facing the carrier, and a second limiting portion is provided on a side of the carrier facing the base. The second limiting portion is used to cooperate with the first limiting portion in limiting manner.

10. The camera module according to claim 9, characterized in that: The first limiting portion includes a first limiting protrusion protruding toward the carrier, and the second limiting portion includes a second limiting protrusion protruding toward the base.

11. The camera module according to claim 9, characterized in that: The camera module further comprises a bracket, and the carrier is arranged between the base and the bracket in the extending direction of the optical axis; A third limiting portion is provided on a side of the bracket facing the carrier, and a fourth limiting portion is provided on a side of the carrier facing the bracket. The fourth limiting portion is used for limiting and cooperating with the third limiting portion.

12. The camera module according to claim 11, characterized in that: The third limiting portion includes a third limiting protrusion protruding toward the carrier, and the fourth limiting portion includes a fourth limiting protrusion protruding toward the base.

13. The camera module according to claim 1, characterized in that: The base is provided with a positioning groove, and one end of the piezoelectric part facing away from the driving part is inserted into the positioning groove.

14. The camera module according to claim 13, characterized in that: The draft angle of the positioning groove is greater than or equal to 5°.

15. An electronic device, characterized in that: A camera module comprising any one of claims 1-14.

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