Camera module

Abstract

The invention provides a camera module. The camera module comprises a fixing unit; the moving unit comprises a carrier and a lens unit, and the carrier is used for driving the lens unit to move in the optical axis direction; the optical axis stabilizing mechanism comprises pressure assemblies distributed around the carrier, the pressure assemblies comprise the first pressure assembly and the second pressure assembly, the first pressure assembly and the second pressure assembly are oppositely arranged on the two sides of the carrier, the first pressure assembly is in elastic contact with the carrier, and the second pressure assembly is in elastic contact with the carrier. The second pressure assembly is in rigid contact with the carrier so that positive pressure can be applied to the carrier, the resultant force direction of the positive pressure points to the optical axis and is perpendicular to the optical axis, and therefore when the carrier drives the lens unit to move in the optical axis direction, movement of the moving unit in the direction perpendicular to the optical axis can be well limited. Therefore, the movement stability of the long-stroke camera module in the direction perpendicular to the optical axis is ensured.

Description

Technical Field

[0001] The invention relates to a camera module. Background Art

[0002] At present, most mobile devices such as mobile phones and tablets are equipped with camera modules, which can realize the conversion between optical signals and electrical signals, record and save image information, and thus realize the functions of taking pictures and videos. Compared with traditional camera systems, cell phone camera modules (CCM) are widely used in various new generation portable camera devices due to their advantages such as miniaturization, low power consumption, low cost and high image quality.

[0003] At present, the structure of the camera module includes a lens unit, a voice coil motor (VCM), an infrared cutoff filter, an image sensor, a flexible printed circuit board (FPC) or a printed circuit board (PCB), and a connector connected to the mobile phone motherboard. Among them, the voice coil motor is used to realize the autofocus function of the lens unit, and the voice coil motor usually includes a magnet, a coil and other structures. During the operation of the camera module, the coil is first energized, and the energized coil cuts the magnetic flux lines in the magnetic field to generate electromagnetic force. The coil or magnet moves under the action of the electromagnetic force, thereby driving the lens unit connected to the voice coil motor to move, adjusting the image distance and object distance of the camera module, and presenting a clear image. Usually, a Hall-effect Sensor can also be set in the voice coil motor, and the Hall sensor is used to measure the change of the magnetic field in the voice coil motor, and the position of the coil or magnet is judged according to the change of the magnetic field, so as to realize the closed-loop control of the voice coil motor. The most common is that the autofocus function in the mobile phone camera is completely completed by the entire driver.

[0004] With the rapid development of the smartphone industry, people's requirements for the imaging effect of mobile phone cameras are gradually increasing. The focal length zoom range is an important factor affecting the imaging effect of mobile phone cameras. These require the voice coil motor to be able to drive with a large stroke, and the large stroke drive needs to keep the camera stable within the stroke range, which puts high requirements on the optical axis stability of the voice coil motor. Summary of the invention

[0005] The problem solved by the invention is to provide a camera module with a large stroke and capable of maintaining stable movement of a lens unit.

[0006] To solve the above problems, the present invention provides a camera module, comprising: a fixed unit; a moving unit, comprising a carrier and a lens unit, the carrier being used to drive the lens unit to move along the optical axis; an optical axis stabilization mechanism, comprising a pressure component distributed around the carrier, the pressure component contacts the carrier and applies positive pressure to the carrier, the resultant direction of the positive pressure points to the optical axis and is perpendicular to the optical axis; the pressure component comprises a first pressure component and a second pressure component, the first pressure component and the second pressure component are relatively arranged on two sides of the carrier, the first pressure component forms an elastic contact with the carrier, and the second pressure component forms a rigid contact with the carrier.

[0007] Preferably, the fixing unit includes a base, the carrier is mounted on the base, the optical axis stabilization mechanism also includes a supporting assembly arranged on the base, the supporting assembly includes a first supporting assembly and a second supporting assembly, the first pressure assembly cooperates with the first supporting assembly, and the second pressure assembly cooperates with the second supporting assembly.

[0008] Preferably, the first supporting component has a first clamping position and a second clamping position, the first pressure component includes a first metal sheet clamped on the first clamping position and a first rolling body clamped on the second clamping position, one side of the first rolling body is in contact with the first metal sheet, and the other side of the first rolling body passes through the second clamping position and contacts with a first guide rail arranged on the carrier and extending along the optical axis. The first metal sheet also has an elastic structure, which is located on the first metal sheet and is clamped in the first clamping position.

[0009] Preferably, the second supporting assembly has a third clamping position and a fourth clamping position, and the second pressure assembly includes a second metal sheet clamped on the third clamping position and a second rolling body clamped on the fourth clamping position, one side of the second rolling body contacts the second metal sheet, and the other side of the second rolling body passes through the fourth clamping position and contacts a second guide rail arranged on the carrier and extending along the optical axis.

[0010] Preferably, the first rolling body and the second rolling body are balls or rollers.

[0011] Preferably, the first rolling body and the second rolling body are a plurality of balls arranged side by side.

[0012] Preferably, the carrier has a through hole or an opening corresponding to the supporting assembly, and after the carrier is mounted on the base, the supporting assembly penetrates into the through hole or the opening.

[0013] Preferably, a third guide rail extending along the optical axis is provided on the first supporting assembly, the first pressure assembly includes a third rolling body arranged on the side wall of the carrier, the third rolling body has a surface protruding from the side wall of the carrier, the protruding surface of the third rolling body is in contact with the third guide rail, and a spring sheet is provided in the side slot of the carrier, one side of the spring sheet is in contact with the third rolling body, and the other opposite side is in contact with the carrier.

[0014] Preferably, the second supporting assembly is provided with a limiting groove extending along the optical axis direction, and the second pressure assembly includes a fourth rolling body arranged on the side wall of the carrier, the fourth rolling body has a surface protruding from the side wall of the carrier, and the protruding surface of the fourth rolling body is at least partially embedded in the limiting groove.

[0015] Preferably, the third rolling body and the fourth rolling body are balls or rollers.

[0016] Preferably, the fixing unit comprises an outer shell and a bracket ring, the carrier moves up and down along the optical axis inside the outer shell, the bracket ring is fixedly arranged at the top of the outer shell, and the optical axis stabilizing mechanism comprises an elastic retaining ring arranged in the bracket ring, the elastic retaining ring has an opening, and a plurality of fifth rolling bodies are arranged between the elastic retaining ring and the carrier, the fifth rolling body close to the opening and the elastic retaining ring constitute a first pressure assembly, and the fifth rolling body away from the opening and the elastic retaining ring constitute a second pressure assembly.

[0017] Preferably, the fifth rolling body is a ball or a roller.

[0018] Compared with the prior art, the technical solution of the present invention has the following advantages: In the camera module of the present invention, a first pressure component and a second pressure component are arranged around a carrier, and the first pressure component and the second pressure component are arranged on two sides of the carrier opposite to each other, wherein the first pressure component forms an elastic contact with the carrier, and the second pressure component forms a rigid contact with the carrier, thereby respectively applying positive pressure to the carrier, and the resultant direction of the positive pressure points to the optical axis and is perpendicular to the optical axis. Therefore, when the carrier moves along the optical axis with the lens unit, the movement of the moving unit in the direction perpendicular to the optical axis can be well restricted, thereby ensuring the stability of the long-stroke camera module in the direction perpendicular to the optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By the drawings and the subsequent appendices to the specification Figure 1 With reference to the specific embodiments used to illustrate certain principles of the present invention, other features and advantages of the present invention will become clear or be more specifically explained.

[0020] Figure 1A partial top view of a camera module according to Embodiment 1 of the present invention; Figure 2 is a stereoscopic diagram of a pressure component in a camera module according to Embodiment 1 of the present invention; Figure 3 A three-dimensional diagram of a base and a supporting assembly in a camera module according to Embodiment 1 of the present invention; Figure 4 A three-dimensional diagram of a carrier, a base and an optical axis stabilizing mechanism in a camera module according to Embodiment 1 of the present invention; Figure 5 For along Figure 4 Sectional view along line AA; Figure 6 A partial top view of a camera module according to Embodiment 2 of the present invention; Figure 7 A three-dimensional diagram of a base and a supporting assembly in a camera module according to Embodiment 2 of the present invention; Figure 8 An exploded view of a carrier, a base and an optical axis stabilizing mechanism in a camera module according to Embodiment 2 of the present invention; Fig. 9 For along Figure 6 Sectional view along the midline BB; Fig.10 , Fig.11 is a partial top view of a camera module according to Embodiment 3 of the present invention; Fig.12 A three-dimensional diagram of a support ring and an optical axis stabilizing mechanism in a camera module according to Embodiment 3 of the present invention; Fig.13 It is a three-dimensional diagram of the combined use of the optical axis stabilization mechanism according to the first and third embodiments of the present invention.

[0021] In the drawings, the same or similar reference numerals denote the same or similar devices (modules) or steps throughout different drawings. Implementation

[0022] As described in the background technology, providing a method that can effectively limit the movement of the camera module in the direction perpendicular to the optical axis when the camera module is working, improve the stability of the camera module and ensure that the camera module has a larger stroke is one of the problems that need to be urgently solved in the current camera module field.

[0023] In order to solve the stability problem of the camera module during operation, an embodiment of the present invention provides a camera module, wherein a first pressure component and a second pressure component are arranged around a carrier, and the first pressure component and the second pressure component are arranged on two sides of the carrier opposite to each other, wherein the first pressure component forms an elastic contact with the carrier, and the second pressure component forms a rigid contact with the carrier, thereby respectively applying positive pressure to the carrier, and the resultant direction of the positive pressure points to the optical axis and is perpendicular to the optical axis. Therefore, when the carrier moves along the optical axis with the lens unit, the movement of the moving unit in the direction perpendicular to the optical axis can be well restricted, thereby ensuring the stability of the long-stroke camera module in the direction perpendicular to the optical axis.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Example

[0025] Please refer to Figures 1 to 5 The camera module of this embodiment includes a moving unit and a fixed unit. The moving unit includes a carrier 101 and a lens unit (not shown). Preferably, the carrier 101 has a lens accommodating cavity 129 that runs through the surface of the carrier 101, and the lens unit can be arranged in the lens accommodating cavity 129; the fixed unit includes a base 105, and the carrier 101 is installed on the base 105. Under the action of the driving force, the carrier 101 moves up and down along the optical axis Z direction relative to the base 105, thereby driving the lens unit to move along the optical axis direction to achieve focusing.

[0026] The camera module of this embodiment further includes an optical axis stabilization mechanism, which includes pressure components 103 and 104 distributed around the carrier 101. The pressure components 103 and 104 are in contact with the carrier 101 to apply positive pressure to the carrier 101, and the resultant force direction of the positive pressure points to the optical axis Z and is perpendicular to the optical axis Z. Preferably, the pressure components 103 and 104 are evenly distributed around the carrier 101 to ensure that the carrier 101 is subjected to balanced force.

[0027] Specifically, the pressure assembly includes a first pressure assembly 103 and a second pressure assembly 104. Two first pressure assemblies 103 and two second pressure assemblies 104 are shown here as examples rather than limitations. Those skilled in the art can understand that the specific number of the first pressure assembly 103 and the second pressure assembly 104 can be flexibly set according to actual needs. Among them, each of the first pressure assembly 103 and the second pressure assembly 104 is relatively arranged on both sides of the carrier 101, the first pressure assembly 103 forms an elastic contact with the carrier 101, and the second pressure assembly 104 forms a rigid contact with the carrier 101, so as to apply positive pressure to the carrier 101 respectively, and the resultant force direction of the positive pressure points to the optical axis and is perpendicular to the optical axis. Therefore, when the carrier 101 moves along the optical axis with the lens unit, the movement of the moving unit in the direction perpendicular to the optical axis can be well restricted, thereby ensuring the stability of the long-stroke camera module in the direction perpendicular to the optical axis, so that the imaging quality of the final camera module is improved.

[0028] In this embodiment, the optical axis stabilization mechanism also includes support components evenly distributed around the base 105, the support components include a first support component 106 and a second support component 107, the first pressure component 103 is installed in the first support component 106, and the second pressure component 104 is installed in the second support component 107.

[0029] In this embodiment, the first support component 106 has a first clamping position 108 and a second clamping position 109, and the first pressure component 103 includes a first metal sheet 110 clamped on the first clamping position 108 and a first rolling body 111 clamped on the second clamping position 109, one side of the first rolling body 111 is in contact with the first metal sheet 110, and the other side of the first rolling body 111 passes through the second clamping position 109 and contacts with a first guide rail 127 arranged on the carrier 101 and extending along the optical axis. When the carrier 101 moves, the coil component (not shown) fixed on the carrier 101 is electrically connected to the focus control chip through the first rolling body 111 and the first metal sheet 110.

[0030] In this embodiment, the second support component 107 has a third clamping position 112 and a fourth clamping position 113, and the second pressure component 104 includes a second metal sheet 114 clamped on the third clamping position 112 and a second rolling body 115 clamped on the fourth clamping position 113. One side of the second rolling body 115 contacts the second metal sheet 114, and the other side of the second rolling body 115 passes through the fourth clamping position 113 and contacts the second guide rail 128 arranged on the carrier 101 and extending along the optical axis. When the carrier 101 moves, the coil component (not shown) fixed on the carrier 101 is electrically connected to the focus control chip through the second rolling body 115 and the second metal sheet 114.

[0031] In this embodiment, the first metal sheet 110 and the second metal sheet 114 are straight sheet-type, so that the first metal sheet can be vertically inserted into the first clamping position 108 and the second metal sheet can be vertically inserted into the third clamping position 112, thereby facilitating equipment, simplifying the installation process, and improving efficiency. The first metal sheet 110 has an elastic structure 116, which is located on the first metal sheet and clamped in the first clamping position 108, thereby forming an elastic contact on one side of the carrier 101. The second metal sheet 114 does not have an elastic structure, thereby forming a rigid contact on the other side opposite to the carrier 101.

[0032] In this embodiment, since the first pressure component 103 is located on the first support component 106, and the second pressure component 104 is located on the second support component 107, and since the first support component 106 and the second support component 107 are evenly distributed around the carrier 101, the carrier 101 is evenly subjected to extrusion force in all directions perpendicular to the optical axis, thereby enhancing the torsional resistance of the carrier 101 and thus enhancing the stability of the movement of the carrier 101 in the direction perpendicular to the optical axis.

[0033] Preferably, the first rolling body 111 and the second rolling body 115 may be balls or rollers. Further preferably, they may be a plurality of side-by-side balls. For example, two side-by-side balls may be used to increase the contact area between the first rolling body 111, the second rolling body 115 and the first guide rail 127, the second guide rail 128. On the one hand, the conductivity between the rolling body and the guide rail may be increased. On the other hand, the difficulty of twisting the lens unit in a direction perpendicular to the optical axis is enhanced, thereby reducing the twisting angle of the lens unit in a direction perpendicular to the optical axis and improving the stability of the lens unit in a direction perpendicular to the optical axis.

[0034] In this embodiment, the base 105 may also have a buried wire layer (not shown in the figure), which is embedded in the base 105, one end of the buried wire layer is connected to the first metal sheet 110 and the second metal sheet 114, and the other end of the buried wire layer is connected to the focus control chip through the PCB circuit.

[0035] In addition, in this embodiment, openings 102 corresponding to the supporting components are respectively provided at the four corners of the carrier 101. After the carrier 101 is installed on the base 105, the supporting components 106 and 107 are inserted into the openings 102. In other embodiments not shown, through holes corresponding to the supporting components 106 and 107 may also be provided on the carrier 101. After the carrier 101 is installed on the base 105, the supporting components are inserted into the through holes, thereby relatively fixing the position of the carrier 101 between the base 105. Example

[0036] Please refer to Figures 6 to 9 The camera module of this embodiment includes a moving unit and a fixed unit. The moving unit includes a carrier 201 and a lens unit (not shown). Preferably, the carrier 201 has a lens accommodating cavity 229 that runs through the surface of the carrier 201, and the lens unit can be arranged in the lens accommodating cavity 229; the fixed unit includes a base 205, and the carrier 201 is installed on the base 205. Under the action of the driving force, the carrier 201 moves up and down along the optical axis Z direction relative to the base 205, thereby driving the lens unit to move along the optical axis direction to achieve focusing.

[0037] The camera module of this embodiment further includes an optical axis stabilization mechanism, which includes pressure components 203 and 204 distributed around the carrier 201. The pressure components 203 and 204 are in contact with the carrier 201 to apply positive pressure to the carrier 201, and the resultant force direction of the positive pressure points to the optical axis Z and is perpendicular to the optical axis Z. Preferably, the pressure components 203 and 204 are evenly distributed around the carrier 201 to ensure that the carrier 201 is subjected to balanced force.

[0038] Specifically, the pressure assembly includes a first pressure assembly 203 and a second pressure assembly 204. Two first pressure assemblies 203 and two second pressure assemblies 204 are shown here as examples rather than limitations. Those skilled in the art can understand that the specific number of the first pressure assembly 203 and the second pressure assembly 204 can be flexibly set according to actual needs. Among them, each of the first pressure assembly 203 and the second pressure assembly 204 is relatively arranged on both sides of the carrier 201, the first pressure assembly 203 forms an elastic contact with the carrier 201, and the second pressure assembly 204 forms a rigid contact with the carrier 201, so as to apply positive pressure to the carrier 201 respectively, and the resultant force direction of the positive pressure points to the optical axis and is perpendicular to the optical axis. Therefore, when the carrier 201 moves along the optical axis with the lens unit, the movement of the moving unit in the direction perpendicular to the optical axis can be well restricted, thereby ensuring the stability of the long-stroke camera module in the direction perpendicular to the optical axis, so that the imaging quality of the final camera module is improved.

[0039] In this embodiment, the optical axis stabilization mechanism also includes support components evenly distributed around the base 205, and the support components include a first support component 206 and a second support component 207. The first pressure component 203 is in contact with the first support component 206, and the second pressure component 204 is in contact with the second support component 207.

[0040] In this embodiment, the first support assembly 206 is provided with a third guide rail 222 extending along the optical axis direction, and the first pressure assembly 203 includes a third rolling body 211 provided on the side wall of the carrier 203, and the third rolling body 211 has a surface protruding from the side wall of the carrier 203. When the carrier 201 is mounted on the base 205, the protruding surface of the third rolling body 211 contacts the third guide rail 222, so that when the carrier 201 moves, the third rolling body 211 moves with the carrier 201 and forms a rolling or sliding contact with the first support assembly 206. The process of the third rolling body 211 moving with the carrier 201 is essentially the process of the carrier 201 moving with the third rolling body 211, so the distance moved by the third rolling body 211 on the third guide rail 222 is equivalent to the stroke of the camera module. Therefore, since the third rolling body 211 can move a larger distance on the third guide rail 222, the corresponding camera module has a larger stroke, thereby ensuring that the formed camera module has better imaging quality.

[0041] In this embodiment, the third rolling body 211 is detachably connected to the side wall of the carrier 201; in other embodiments, the third rolling body 211 is fixedly connected to the side wall of the carrier 201. A spring 220 is disposed in the carrier side slot 224, one side of the spring 220 contacts the third rolling body 211, and the other side contacts the carrier 201, thereby forming an elastic contact on one side of the carrier 201.

[0042] In this embodiment, the third rolling body 211 is a conductive ball. The conductive ball is used because, on the one hand, it plays a role of conductivity, and on the other hand, the conductive ball can roll in the third guide rail 222, thereby reducing the friction generated when the carrier 201 moves, and improving the imaging quality of the camera module. In other embodiments, the third rolling body 211 can also be a roller.

[0043] In this embodiment, the third guide rail 222 plays the role of a slide rail on one hand, and can play the role of conductivity on the other hand. When the camera module is powered on, an electrical connection is formed among the third guide rail 222, the third rolling body 211 and the carrier 201.

[0044] In this embodiment, a limiting groove 223 extending along the optical axis direction is provided on the second support component 207, and the second pressure component 204 includes a fourth rolling body 215 arranged on the side wall of the carrier 201, and the fourth rolling body 215 has a surface protruding from the side wall of the carrier 201, and the protruding surface of the fourth rolling body 215 is at least partially embedded in the limiting groove 223, thereby forming a rigid contact on the other side of the carrier 201.

[0045] The limiting groove 223 provides space for the rolling or sliding of the fourth rolling body 215. In this embodiment, the limiting groove 223 adopts a "V"-shaped groove structure, so that when the fourth rolling body 215 is partially embedded in the limiting groove 223, the contact between the fourth rolling body 215 and the limiting groove 223 is a two-point contact, which on the one hand reduces the motion friction between the fourth rolling body 215 and the limiting groove 223, which helps the rolling of the fourth rolling body 215; on the other hand, the fourth rolling body 215 and the limiting groove 223 and the carrier 201 are in three-point contact, ensuring that when the carrier 201 moves, the fourth rolling body 215 can move with the carrier 201 and can rotate in the limiting groove 223, thereby realizing rolling contact or sliding contact between the fourth rolling body 215 and the second supporting assembly 207. In other embodiments not shown, the limiting groove 223 can also be a "U"-shaped groove structure.

[0046] In this embodiment, the fourth rolling body 215 and the side wall of the carrier 201 are detachably connected; in other embodiments, the fourth rolling body 215 and the side wall of the carrier 201 can also be fixedly connected.

[0047] In this embodiment, the fourth rolling body 215 is clamped with the side wall of the carrier 201, and a clamping groove 221 is provided on the side wall of the carrier 203. One side of the fourth rolling body 215 is clamped in the clamping groove 221, and the other side of the fourth rolling body 215 protrudes from the side wall surface of the carrier 201. The fourth rolling body 215 can rotate in the clamping groove 221.

[0048] In this embodiment, the first support assembly 206 and the second support assembly 207 are symmetrically distributed around the base 205, and the first pressure assembly 203 and the second pressure assembly 204 are respectively located on a pair of oppositely arranged side walls of the carrier 201. The first pressure assembly 203 cooperates with the first support assembly 206 to form an elastic contact on one side of the carrier 201; the second pressure assembly 204 and the second support assembly 207 cooperate with each other to form a rigid contact on the other side opposite to the carrier 201, so that the carrier 201 is uniformly subjected to the extrusion force in the directions perpendicular to the optical axis, so that the torsion resistance of the carrier 201 is enhanced, thereby enhancing the stability of the movement of the carrier 201 in the direction perpendicular to the optical axis, so as to improve the imaging quality of the camera module.

[0049] In this embodiment, the base 205 may also have a wire embedding layer (not shown in the figure), which is embedded in the base 205, one end of the wire embedding layer is connected to the third guide rail 226, and the other end of the wire embedding layer is connected to the focus control chip through a PCB circuit. Example

[0050] Please refer to Figures 10 to 12 The camera module of the present invention may further include an iron shell (not shown) and a bracket ring 330. The iron shell is arranged around the base, and the carrier 301 moves up and down along the optical axis inside the iron shell. The bracket ring 330 is fixedly arranged on the top of the iron shell.

[0051] In this embodiment, the optical axis stabilization mechanism includes an elastic retaining ring 331 disposed in the support ring 330, the elastic retaining ring 331 has an opening 332, and a plurality of fifth rolling bodies 333, 334 are disposed between the elastic retaining ring 331 and the carrier 301. Preferably, the fifth rolling bodies 333, 334 are evenly distributed around the carrier 301, and further preferably, the fifth rolling bodies 333, 334 are disposed in pairs and evenly distributed around the carrier 301 to ensure that the carrier 301 is subjected to balanced force. Since the elastic retaining ring 331 can produce obvious elastic deformation at the part close to the opening 332 when being squeezed, the fifth rolling body 333 close to the opening 332 and the elastic retaining ring 331 form a first pressure assembly, forming an elastic contact with the carrier 301, and the fifth rolling body 334 away from the opening 332 and the elastic retaining ring 331 form a second pressure assembly, forming a rigid contact with the carrier 301. Preferably, the fifth rolling bodies 333, 334 can be balls or rollers.

[0052] Therefore, the carrier 301 is uniformly subjected to the extrusion force in all directions perpendicular to the optical axis, thereby enhancing the stability of the movement of the carrier 301 perpendicular to the optical axis, so as to improve the imaging quality of the camera module.

[0053] It should be noted that the carrier 301 may be a carrier body, or preferably, may be a metal protective sleeve sleeved on the top of the carrier body to prevent deformation during the extrusion process and thus affect the performance.

[0054] Those skilled in the art can understand that the optical axis stabilization mechanism of the first and second embodiments is arranged between the carrier and the base, and the optical axis stabilization mechanism of the third embodiment is arranged between the carrier and the bracket ring. As required, the optical axis stabilization mechanism of the third embodiment can be used in combination with the optical axis stabilization mechanisms of the first and second embodiments. Fig.13 The three-dimensional structure diagram of the optical axis stabilization mechanism of the first embodiment and the third embodiment is shown. Fig.13 On the right side of the middle, the first rolling body 111 cooperates with the first supporting assembly (not shown) disposed on the base to form an elastic contact with the carrier 101 / 301. At the same time, the fifth rolling body 333 close to the opening 332 of the elastic retaining ring 331 also forms an elastic contact with the carrier 101 / 301. On the other side of the carrier 101 / 301 ( Fig.13On the left side of the center, the second rolling body 115 cooperates with the second supporting assembly (not shown) disposed on the base to form a rigid contact with the carrier 101 / 301, and at the same time, the fifth rolling body 334 away from the opening 332 of the elastic retaining ring 331 also forms a rigid contact with the carrier 101 / 301. Therefore, by combining the optical axis stabilization mechanism of the first embodiment with the third embodiment, the torsion resistance of the carrier is further enhanced, thereby enhancing the stability of the carrier moving in a direction perpendicular to the optical axis, so as to improve the imaging quality of the camera module.

[0055] In addition, in other embodiments not shown, the optical axis stabilization mechanisms of the second embodiment and the third embodiment can also be used in combination, and the details are not repeated here.

[0056] To summarize, in the camera module of the present invention, a first pressure assembly and a second pressure assembly are arranged around a carrier, and the first pressure assembly and the second pressure assembly are arranged on two sides of the carrier relatively to each other, wherein the first pressure assembly forms an elastic contact with the carrier, and the second pressure assembly forms a rigid contact with the carrier, thereby respectively applying positive pressure to the carrier, and the resultant direction of the positive pressure points to the optical axis and is perpendicular to the optical axis. Therefore, when the carrier moves along the optical axis with the lens unit, the movement of the moving unit in a direction perpendicular to the optical axis can be well restricted, thereby ensuring the stability of the long-stroke camera module in the direction perpendicular to the optical axis.

[0057] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, in any case, the embodiments should be considered exemplary and non-restrictive. Furthermore, it is apparent that the term "comprising" does not exclude other elements and steps, and the wording "a" does not exclude the plural. Multiple elements stated in a device claim may also be implemented by one element. The words first, second, etc. are used to indicate names and do not indicate any particular order.

Claims

1. A camera module, characterized in that: include: Fixed unit; A moving unit, comprising a carrier and a lens unit, wherein the carrier is used to drive the lens unit to move along the optical axis; An optical axis stabilization mechanism, comprising pressure components distributed around the carrier, the pressure components contacting the carrier to apply positive pressure to the carrier, the resultant force direction of the positive pressure pointing to the optical axis and perpendicular to the optical axis; The pressure assembly includes a first pressure assembly and a second pressure assembly. The first pressure assembly and the second pressure assembly are arranged on two sides of the carrier opposite to each other. The first pressure assembly forms elastic contact with the carrier, and the second pressure assembly forms rigid contact with the carrier.

2. The camera module according to claim 1, wherein: The fixing unit includes a base, the carrier is installed on the base, the optical axis stabilization mechanism also includes a supporting assembly arranged on the base, the supporting assembly includes a first supporting assembly and a second supporting assembly, the first pressure assembly cooperates with the first supporting assembly, and the second pressure assembly cooperates with the second supporting assembly.

3. The camera module according to claim 2, wherein: The first supporting component has a first clamping position and a second clamping position, the first pressure component includes a first metal sheet clamped on the first clamping position and a first rolling body clamped on the second clamping position, one side of the first rolling body is in contact with the first metal sheet, and the other side of the first rolling body passes through the second clamping position and contacts with a first guide rail arranged on the carrier and extending along the optical axis. The first metal sheet also has an elastic structure, which is located on the first metal sheet and is clamped in the first clamping position.

4. The camera module according to claim 3, wherein: The second supporting component has a third clamping position and a fourth clamping position, and the second pressure component includes a second metal sheet clamped on the third clamping position and a second rolling body clamped on the fourth clamping position, one side of the second rolling body contacts the second metal sheet, and the other side of the second rolling body passes through the fourth clamping position and contacts the second guide rail arranged on the carrier and extending along the optical axis.

5. The camera module according to claim 4, characterized in that: The first rolling body and the second rolling body are balls or rollers.

6. The camera module according to claim 5, characterized in that: The first rolling body and the second rolling body are a plurality of balls arranged side by side.

7. The camera module according to claim 4, wherein: The carrier is provided with a through hole or an opening corresponding to the supporting component. After the carrier is mounted on the base, the supporting component penetrates into the through hole or the opening.

8. The camera module according to claim 2, wherein: A third guide rail extending along the optical axis is arranged on the first supporting component, the first pressure component includes a third rolling body arranged on the side wall of the carrier, the third rolling body has a surface protruding from the side wall of the carrier, the protruding surface of the third rolling body contacts the third guide rail, and a spring sheet is arranged in the side slot of the carrier, one side of the spring sheet contacts the third rolling body, and the other opposite side contacts the carrier.

9. The camera module according to claim 8, wherein: The second supporting assembly is provided with a limiting groove extending along the optical axis direction, and the second pressure assembly includes a fourth rolling body arranged on the side wall of the carrier, the fourth rolling body has a surface protruding from the side wall of the carrier, and the protruding surface of the fourth rolling body is at least partially embedded in the limiting groove.

10. The camera module according to claim 9, wherein: The third rolling body and the fourth rolling body are balls or rollers.

11. The camera module according to claim 1, wherein: The fixing unit comprises a shell and a bracket ring, the carrier moves up and down along the optical axis inside the shell, the bracket ring is fixedly arranged at the top of the shell, the optical axis stabilizing mechanism comprises an elastic retaining ring arranged in the bracket ring, the elastic retaining ring has an opening, and a plurality of fifth rolling bodies are arranged between the elastic retaining ring and the carrier, the fifth rolling body close to the opening and the elastic retaining ring form a first pressure assembly, and the fifth rolling body away from the opening and the elastic retaining ring form a second pressure assembly.

12. The camera module according to claim 11, wherein: The fifth rolling element is a ball or a roller.

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