Pick-up lens driving device

Abstract

A camera lens driving device comprises a frame body, a first lens base, a second lens base and an actuating assembly. The two guide rail pieces are arranged on two sides of the frame body respectively. The first mirror base is slidably arranged on one side of the two guide rail pieces, and the second mirror base is slidably arranged on the other side of the two guide rail pieces. The actuating assembly comprises a first actuating piece and a second actuating piece. The first actuating piece is arranged on one side of the frame body and is clamped between the first lens base and the second lens base. The second actuating piece is arranged on the other side of the frame body and clamps the second lens base. In response to the static friction force of the second actuating piece to the second mirror base being greater than the static friction force of the first actuating piece to the second mirror base and the static friction force of the first actuating piece to the second mirror base being greater than the dynamic friction force of the second actuating piece to the second mirror base, the first actuating piece moves the first mirror base and the second mirror base, and the second actuating piece selectively moves the second mirror base.

Description

Technical Field

[0001] A camera lens driving device, particularly a camera lens driving device capable of zooming and focusing. Background Technology

[0002] As camera lens sizes shrink, current camera lenses utilize voice coil motors (VCMs) for automatic focusing or zooming within limited space to achieve zooming or focusing. Existing voice coil motors use magnets and coils for drive, requiring a relatively large amount of space, making it difficult to further miniaturize electronic products that use them. Utility Model Content

[0003] In view of this, in some embodiments, the camera lens driving device includes a frame, a first lens mount, a second lens mount, and an actuation assembly. Two guide rails are respectively disposed on two sides of the frame. The first lens mount is slidably disposed on one side of the two guide rails, and the second lens mount is slidably disposed on the other side of the two guide rails. The actuation assembly includes a first actuator and a second actuator. The first actuator is disposed on one side of the frame and is clamped to the first lens mount and the second lens mount. The first actuator is used to move the first lens mount and the second lens mount when actuated. The second actuator is disposed on the other side of the frame and is clamped to the second lens mount. The second actuator is used to move the second lens mount when actuated. The static friction force of the second actuator on the second lens mount is greater than the static friction force of the first actuator on the second lens mount, and the static friction force of the first actuator on the second lens mount is greater than the dynamic friction force of the second actuator on the second lens mount.

[0004] In some embodiments, the first lens mount has a first clamping member, which has a first clamping portion; the second lens mount has a second clamping member, which has a second clamping portion and a third clamping portion. A first actuating member is clamped in the first clamping portion and the second clamping portion, and a second actuating member is clamped in the third clamping portion.

[0005] In some embodiments, the first actuator includes a first friction rod and a first piezoelectric element, the first piezoelectric element being connected to one end of the first friction rod, and a first clamping portion being located between the first piezoelectric element and the second clamping portion.

[0006] In some embodiments, the second actuator includes a second friction rod and a second piezoelectric element, the second piezoelectric element being connected to one end of the second friction rod, and a third clamping portion being located between the second piezoelectric element and the first clamping portion.

[0007] In some embodiments, the first clamping portion, the second clamping portion, and the third clamping portion each have a first elastic arm and a second elastic arm; the first elastic arm and the second elastic arm of the first clamping portion generate a first static friction force on the first friction rod; the first elastic arm and the second elastic arm of the second clamping portion generate a second static friction force on the first friction rod; the first elastic arm and the second elastic arm of the third clamping portion generate a third static friction force on the second friction rod. The third static friction force is greater than the second static friction force, and the second static friction force is less than the dynamic friction force of the second actuator on the second mirror mount.

[0008] In some embodiments, the first actuator further includes an elastic element. The elastic element is connected to the first piezoelectric element and undergoes a corresponding deformation in response to actuation of the first piezoelectric element.

[0009] In some embodiments, the two guide rails include a first ball bearing assembly and a second ball bearing assembly, with the first ball bearing assembly located on one side of the frame and the second ball bearing assembly located on the other side of the frame. The first and second mirror mounts slide on these first and second ball bearing assemblies.

[0010] In some embodiments, the camera lens driving device further includes a controller. The controller is electrically connected to the first actuator and the second actuator to generate a first control signal and a second control signal. The first actuator generates a first movement according to the first control signal, the second actuator generates a second movement according to the first control signal to generate dynamic friction on the second lens mount; the second actuator generates a third movement according to the second control signal.

[0011] In some embodiments, the two sides of the first mirror mount and the two guide rails are magnetically attracted to slide on one side of the two guide rails; the two sides of the second mirror mount and the two guide rails are magnetically attracted to slide on the other side of the two guide rails.

[0012] In some embodiments, the first mirror mount has a first slide groove and a second slide groove on each of its two sides. The first slide groove is slidably disposed on one of the two guide rails, and the second slide groove is slidably disposed on the other of the two guide rails. The first slide groove is one of a U-shape and a V-shape, and the second slide groove is the other of a U-shape and a V-shape.

[0013] In summary, the camera lens driving device precisely moves the first and second lens mounts in zoom or focus modes by utilizing the frictional forces generated by the first and second actuators on the first and / or second lens mounts, respectively. Responding to the fact that the static frictional force of the second actuator on the second lens mount is greater than the static frictional force of the first actuator on the second lens mount, and the static frictional force of the first actuator on the second lens mount is greater than the dynamic frictional force of the second actuator on the second lens mount, during zooming, the first actuator can simultaneously move both the first and second lens mounts to achieve zoom movement. During focusing, the second actuator can move the second lens mount to achieve focusing movement. In some embodiments, the first and / or second actuators include piezoelectric elements, which can move the first and / or second lens mounts by deformation of the piezoelectric elements to increase the moving distance of the first or second lens mount.

[0014] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0015] Figure 1 This is a perspective view of the camera lens driving device in some embodiments of the present invention.

[0016] Figure 2 This is a side view of the camera lens driving device in some embodiments of the present invention.

[0017] Figure 3 This is a schematic diagram of the zoom operation of the camera lens driving device in some embodiments of the present invention.

[0018] Figure 4 This is a schematic diagram of the focusing action of the camera lens driving device in some embodiments of the present invention.

[0019] Figure 5 This is a partial schematic diagram of the camera lens driving device in some embodiments of the present invention, showing only the first clamping member and the second clamping member.

[0020] Figure 6 This is a schematic diagram of the implementation of the camera lens driving device in some embodiments of the present invention, showing that the guide rail component is a ball bearing assembly.

[0021] Figure 7 The present invention provides a schematic diagram of the implementation of the camera lens driving device in some embodiments, showing that the first slide is a V-shaped groove and the second slide is a U-shaped groove.

[0022] Figure 8 This is a schematic diagram of the implementation of the camera lens driving device in some embodiments of the present invention, showing that the magnetic suction part is disposed on both sides of the first lens mount.

[0023] Figure 9 This is a schematic diagram showing that, in some embodiments of the present invention, the first actuator is in a stacked shape.

[0024] Figure 10 This is a schematic diagram showing that, in some embodiments of the present invention, the first actuator is in the shape of an elongated cymbal.

[0025] Figure 11 This is a schematic diagram showing that, in some embodiments of the present invention, the first actuator is cymbal-shaped.

[0026] In the attached figures, the following labels are used:

[0027] 100: Camera lens drive device

[0028] 102: Frame

[0029] 104: First Mirror Mount

[0030] 106: Second mirror mount

[0031] 108: Actuation Component

[0032] 110a, 110b: Guide rail components

[0033] 116: First Actuator

[0034] 118: Second Actuator

[0035] 120: First clamping component

[0036] 122: First clamping part

[0037] 124: Second clamping component

[0038] 126: Second clamping part

[0039] 128: Third clamping part

[0040] 130: First friction rod

[0041] 132: First piezoelectric element

[0042] 134: Second friction rod

[0043] 136: Second piezoelectric element

[0044] 138: First clamp arm

[0045] 139: First clamping surface

[0046] 140: Second clamping arm

[0047] 141: Second clamping surface

[0048] 142: Third clamp arm

[0049] 143: Third clamping surface

[0050] 144: Controller

[0051] 146: Ball bearing assembly

[0052] 148: Ball bearing

[0053] 150: Reception slot

[0054] 152: First Slide

[0055] 154: Second Slide

[0056] 156a, 156b: Magnetic suction part

[0057] 158: Magnetic components

[0058] 160: Elastic element

[0059] 160a: First elastic element

[0060] 160b: Second elastic element

[0061] L1: Camera optical axis Detailed Implementation

[0062] The structural and working principles of this utility model will be described in detail below with reference to the accompanying drawings:

[0063] In some embodiments, such as Figure 1 and Figure 2 As shown, the camera lens driving device 100 includes a frame 102, a first lens mount 104, a second lens mount 106, and an actuation assembly 108. The frame 102 has a guide rail (110a, 110b) on each side. The first lens mount 104 is slidably mounted on one side of the two guide rails (110a, 110b). The second lens mount 106 is slidably mounted on the other side of the two guide rails (110a, 110b). The actuation assembly 108 is used to drive the first lens mount 104 and / or the second lens mount 106 to move along the two guide rails (110a, 110b).

[0064] The first lens mount 104 and the second lens mount 106 can each support and assemble an optical element (e.g., a convex lens or a concave lens). The actuation assembly 108 can move the positions of the first lens mount 104 and the second lens mount 106 to perform focusing or zooming. It should be noted that the two guide rails (110a, 110b) are respectively parallel to a camera optical axis L1 of the optical element (e.g., ...). Figure 1The optical axis L1 is parallel to the X-axis. Here, the camera optical axis L1 can refer to the axis passing through the center point of the optical element (lens). Therefore, the guide rails (110a, 110b) can guide the movement of the first lens mount 104 and the second lens mount 106 to maintain an angle and orientation parallel to the camera optical axis L1, thereby achieving precise focusing or zooming.

[0065] The actuation assembly 108 includes a first actuator 116 and a second actuator 118. The first actuator 116 is disposed on one side of the frame 102 and clamped to the first lens mount 104 and the second lens mount 106. The second actuator 118 is disposed on the other side of the frame 102 and clamped to the second lens mount 106. In response to a static friction force exerted by the second actuator 118 on the second lens mount 106 being greater than another static friction force exerted by the first actuator 116 on the second lens mount 106, and a static friction force exerted by the first actuator 116 on the second lens mount 106 being greater than a dynamic friction force exerted by the second actuator 118 on the second lens mount 106, the first actuator 116 can move the first lens mount 104 and the second lens mount 106, and the second actuator 118 can move the second lens mount 106. Taking zoom as an example, as... Figure 3 As shown, the actuation assembly 108 can actuate the first actuator 116 and the second actuator 118, causing the first actuator 116 to simultaneously drive the first lens mount 104 and the second lens mount 106 to move relative to the frame 102 (described in detail later) to perform zooming. Taking focusing as an example again, as... Figure 4 As shown, the actuation assembly 108 can actuate the second actuator 118, causing the first lens mount 104 to remain stationary relative to the frame 102, while the second actuator 118 drives the second lens mount 106 to move relative to the frame 102 (described in detail later) for focusing.

[0066] In some embodiments, the first actuator 116 and / or the second actuator 118 are input with a control signal (e.g., a voltage signal), which can drive the first actuator 116 and / or the second actuator 118 to generate movement (e.g., expansion, contraction, or oscillation). This movement allows the first actuator 116 or the second actuator 118 to move the first mirror mount 104 or the second mirror mount 106, respectively.

[0067] The first actuator 116 and the second actuator 118 generate static or dynamic friction forces on the first mirror mount 104 or the second mirror mount 106, respectively. For example, the first actuator 116 has a first static friction force with the first mirror mount 104, a second static friction force with the second mirror mount 106, and a third static friction force with the second actuator 118. The dynamic friction force of the second actuator 118 on the second mirror mount 106 can refer to the dynamic friction force generated by the second actuator 118 on the second mirror mount 106 during rapid axial movement of the second actuator 118 relative to the second mirror mount 106. Figure 3As shown, in zoom mode, the first actuator 116 can simultaneously move the first lens mount 104 and the second lens mount 106. It should be noted that when the first actuator 116 is actuated, the second actuator 118 will move rapidly axially (i.e., the moving speed of the second actuator 118 is greater than the moving speed of the first actuator 116), causing the second static friction force to be greater than the dynamic friction force of the second actuator 118 on the second lens mount 106. Therefore, the second lens mount 106 will be driven by the first actuator 116 but not by the second actuator 118. In other words, the first lens mount 104 and the second lens mount 106 can move simultaneously while maintaining a preset distance (the preset distance can correspond to the focal length parameter that the camera lens drive device 100 wants to adjust). Figure 4 As shown, in focus mode, the second actuator 118 can move the second lens mount 106 by a third static friction force without moving the first actuator 116. In other words, the second actuator 118 moves the second lens mount 106 relative to the first lens mount 104 while the second actuator and the second lens mount 106 are relatively stationary.

[0068] The camera lens drive device 100 is designed to utilize the frictional force generated by the first actuator 116 and the second actuator 118 on the first lens mount 104 or the second lens mount 106 respectively, so as to move the first lens mount 104 or the second lens mount 106 in zoom mode or focus mode respectively, so as to complete the precise zoom or focus movement.

[0069] In some embodiments, such as Figure 1 As shown, the first mirror mount 104 has a first clamping member 120, and the first clamping member 120 has a first clamping portion 122. The second mirror mount 106 has a second clamping member 124, and the second clamping member 124 has a second clamping portion 126 and a third clamping portion 128. A first actuating member 116 is clamped in the first clamping portion 122 and the second clamping portion 126. A second actuating member 118 is clamped in the third clamping portion 128.

[0070] In some embodiments, such as Figure 1As shown, the first actuator 116 includes a first friction rod 130 and a first piezoelectric element 132. One side of the first piezoelectric element 132 is connected to the frame 102, and the other side is connected to the first friction rod 130. When the first actuator 116 is not actuated, a first static friction force is generated between the first friction rod 130 and the first clamping portion 122, and a second static friction force is generated between the first friction rod 130 and the second clamping portion 126. The first piezoelectric element 132 can be a piezoelectric ceramic, a piezoelectric transistor, or a piezoelectric film (e.g., polyvinylidene fluoride). When a control signal (described later) is given to the first piezoelectric element 132, the first piezoelectric element 132 can contract and expand to drive the first friction rod 130 to move axially. It should be noted that the first clamping portion 122 is located between the first piezoelectric element 132 and the second clamping portion 126. When the first friction rod 130 is driven by the first piezoelectric element 132, it can simultaneously drive the first mirror mount 104 and the second mirror mount 106 with the first static friction force and the second static friction force.

[0071] In some embodiments, such as Figure 1 As shown, the second actuator 118 includes a second friction rod 134 and a second piezoelectric element 136. One side of the second piezoelectric element 136 is connected to the frame 102, and the other side is connected to one end of the second friction rod 134. When the second actuator 118 is not actuated, the second friction rod 134 generates a third static friction force with the third clamping portion 128. The second piezoelectric element 136 can be a piezoelectric ceramic, a piezoelectric transistor, or a piezoelectric film. When a control signal is given to the second piezoelectric element 136 (described later), the second piezoelectric element 136 can contract and expand to drive the second friction rod 134 to move axially. For example, in zoom mode, rapid axial movement of the second friction rod 134 can reduce the dynamic friction force between the second friction rod 134 and the third clamping portion 128, ensuring that the first friction rod 130 can simultaneously move the first lens mount 104 and the second lens mount 106. In some embodiments, such as Figure 2 As shown, the first friction rod 130 and the second friction rod 134 are positioned parallel to each other and at different heights, so that their movements do not affect each other. In some embodiments, the second clamping part 126 and the third clamping part 128 are located on the same plumb line. In this way, when the second friction rod 134 moves rapidly, it can reduce interference or resistance to the movement of the first friction rod 130.

[0072] In some embodiments, such as Figure 1 and Figure 5As shown, the first clamping portion 122 has two first clamping arms 138 (e.g., U-shaped clamping arms). One end of the two first clamping arms 138 is connected to each other, and the other end of the two first clamping arms 138 is brought closer to each other by elastic force to clamp the first friction rod 130 and generate a first static friction force. In some embodiments, the second clamping portion 126 has two second clamping arms 140 (e.g., U-shaped clamping arms), and the third clamping portion 128 has two third clamping arms 142 (e.g., U-shaped clamping arms). One end of the two second clamping arms 140 is connected to one end of the two third clamping arms 142, and the other end of the two second clamping arms 140 is brought closer to each other by elastic force to clamp the first friction rod 130 and generate a second static friction force. The other end of the two third clamping arms 142 is brought closer to each other by elastic force to clamp the second friction rod 134 and generate a third static friction force. In some embodiments, the two first clamping arms 138 and / or the two second clamping arms 140 can determine the clamping force on the first friction rod 130 according to the corresponding first static friction force or second static friction force, respectively. The third clamping arm 142 can determine the clamping force on the second friction rod 134 based on the third static friction force.

[0073] In some embodiments, such as Figure 5 As shown, each of the two first clamping arms 138 has a first clamping surface 139 between its two ends. The two first clamping surfaces 139 directly contact the first friction rod 130 to generate a first static friction force on the first friction rod 130. Each of the two second clamping arms 140 has a second clamping surface 141 between its two ends. The two second clamping surfaces 141 directly contact the first friction rod 130 to generate a second static friction force on the first friction rod 130. The two first clamping surfaces 139 and the two second clamping surfaces 141 are at the same height. This allows the first friction rod 130 to move stably axially (e.g., when moving). Figure 1 (In the direction of the central camera optical axis L1). The two third clamping arms 142 each have a third clamping surface 143 between their two ends. The two second clamping surfaces 141 directly contact the second friction rod 134 to generate a second static friction force on the second friction rod 134. This allows the second friction rod 134 to move stably axially during movement. In some embodiments, the two first clamping surfaces 139, the two second clamping surfaces 141, and / or the third clamping surface 143 can be arc-shaped surfaces. This arc-shaped surface directly contacts the first friction rod 130 or the second friction rod 134 to increase the contact area and achieve a preset static friction force.

[0074] In some embodiments, such as Figure 1As shown, the camera lens driving device 100 further includes a controller 144. The controller 144 is electrically connected to a first actuator 116 and a second actuator 118 to generate a first control signal and a second control signal. The first actuator 116 generates a first movement according to the first control signal to move the first lens mount 104 and the second lens mount 106. The second actuator 118 generates a second movement according to the first control signal to generate dynamic friction on the second lens mount 106 (e.g., at the position of the third clamping portion 128). The second actuator 118 generates a third movement according to the second control signal to move the second lens mount 106. Here, the first movement may refer to the movement of the first piezoelectric element 132, such as expansion, contraction, or oscillation, driving the first friction rod 130 to move back to its original position. The second movement may refer to the movement of the second piezoelectric element 136, such as expansion, contraction, or oscillation, driving the second friction rod 134 to move back to its original position rapidly, with dynamic friction between the second friction rod 134 and the third clamping portion 128. The third motion can refer to the movement of the second friction rod 134, such as expansion, contraction, or oscillation, causing it to move back and forth. A third static friction force exists between the second friction rod 134 and the third clamping part 128. The controller 144 can be a central processing unit (CPU), a microcontroller unit (MCU), a graphics processing unit (GPU), or a circuit board with such a processor or controller. In some embodiments, the controller 144 can selectively send a first control signal and / or a second control signal according to the zoom mode or focus mode. For example, during zooming, the controller 144 sends the first control signal to the first actuator 116 and the second actuator 118. During focusing, the controller 144 sends the second control signal to the second actuator 118.

[0075] In some embodiments, such as Figure 6 As shown, the two guide rails (110a, 110b) can each be a ball bearing assembly 146. The first lens mount 104 and the second lens mount 106 slide on the two ball bearing assemblies 146 disposed on both sides of the frame 102. In some embodiments, the two ball bearing assemblies 146 each have a plurality of balls 148 and a receiving groove 150. Each ball bearing 148 is arranged along the receiving groove 150, is movably connected, and partially protrudes from the receiving groove 150. When the first lens mount 104 or the second lens mount 106 slides, each ball bearing 148 can reduce the friction between the frame 102 and the first lens mount 104 or the second lens mount 106.

[0076] In some embodiments, such as Figure 7 and Figure 8As shown, the first mirror mount 104 has a first sliding groove 152 and a second sliding groove 154 on each of its two sides. The first sliding groove 152 slides on the guide rail 110a, and the second sliding groove 154 slides on the guide rail 110b. It should be noted that the structures of the first mirror mount 104 and the second mirror mount 106 are similar; the structure of the second mirror mount 106 can be referred to in the structural description of the first mirror mount 104. In some embodiments, such as... Figure 2 and Figure 7 As shown, the two sides of the first mirror mount 104 are magnetically attracted to the two guide rails (110a, 110b) to slide on one side of the two guide rails (110a, 110b). The two sides of the second mirror mount 106 are magnetically attracted to the two guide rails (110a, 110b) to slide on the other side of the two guide rails (110a, 110b). Thus, the first mirror mount 104 and the second mirror mount 106 can be magnetically attracted to the two guide rails (110a, 110b) to ensure the stability of their movement.

[0077] In some embodiments, such as Figure 7 and Figure 8 As shown, the first mirror mount 104 has a magnetic attraction portion (156a, 156b) on each side. A first sliding groove 152 is located between the magnetic attraction portion 156a and the guide rail 110a, and a second sliding groove 154 is located between the magnetic attraction portion 156b and the guide rail 110b. The two magnetic attraction portions (156a, 156b) are attracted to the two guide rails (110a, 110b) by magnetism, causing the first sliding groove 152 and the second sliding groove 154 to move closer to the two guide rails (110a, 110b) and slide on one side of the two guide rails (110a, 110b). In some embodiments, such as Figure 8 As shown, each of the two magnetic suction parts (156a, 156b) is provided with a magnetic element 158, and the two guide rails (110a, 110b) are ferromagnetic elements, causing the magnetic suction parts (156a, 156b) to move closer to the two guide rails (110a, 110b). In some embodiments, the first mirror mount 104 is a ferromagnetic element, and the magnetic element 158 ​​is fixed to the frame 102 and used to attract the first mirror mount 104 toward the frame 102. This causes the first slide groove 152 and the second slide groove 154 to move closer to the two guide rails (110a, 110b).

[0078] In some embodiments, such as Figure 7As shown, the first groove 152 is one of a U-shaped groove and a V-shaped groove, and the second groove 154 is the other of a U-shaped groove and a V-shaped groove. Taking the first groove 152 as a V-shaped groove and the second groove 154 as a U-shaped groove as an example, in response to the fact that the contact area between the V-shaped first groove 152 and the guide rail 110a is greater than the contact area between the U-shaped second groove 154 and the guide rail 110b, the first groove 152 can maintain the stability of the movement of the first mirror mount 104 (or the second mirror mount 106) when it moves. The second groove 154 can reduce the friction between itself and the guide rail 110b to ensure the smooth movement of the first mirror mount 104. Thus, by designing the first groove 152 and the second groove 154 as either a V-shaped groove or a U-shaped groove, the first mirror mount 104 (or the second mirror mount 106) can achieve both stability and smooth movement.

[0079] In some embodiments, such as Figure 9 , Figure 10 and Figure 11 As shown, the first actuator 116 further includes an elastic element 160. The elastic element 160 is connected to the first piezoelectric element 132. The elastic element 160 undergoes a corresponding deformation in response to actuation of the first piezoelectric element 132. In some embodiments, such as Figure 9 and Figure 10 As shown, the elastic element 160 is located between the first piezoelectric element 132 and the first friction rod 130. When the first piezoelectric element 132 is actuated (by a phase difference of the input preset voltage), the first piezoelectric element 132 elongates or shortens to different degrees, causing the elastic element 160 to deform accordingly, which in turn causes the first friction rod 130 to vibrate, thereby driving the first mirror mount 104 to move axially along the corresponding direction of the imaging optical axis L1. In some embodiments, such as Figure 11 As shown, the first piezoelectric element 132 may also be located between the elastic element 160 and the first friction rod 130. The elastic element 160 may be, for example, rubber or a spring.

[0080] In some embodiments, the number of elastic elements 160 can be one or more. Figure 10 For example, the elastic element 160 includes a first elastic element 160a and a second elastic element 160b. The first elastic element 160a and the second elastic element 160b are sandwiched within the first piezoelectric element 132. In some embodiments, the cross-section of the first piezoelectric element 132 has the same shape or area as the cross-section of the elastic element 160. For example... Figure 9 As shown, the first piezoelectric element 132 and the elastic element 160 are formed in a stacked structure. For example... Figure 10 As shown, the first piezoelectric element 132 and the elastic element 160 are formed into an elongated cymbal shape. For example... Figure 11As shown, the first piezoelectric element 132 and the elastic element 160 are formed in the shape of a cymbal. In some embodiments, the second actuator 118 also includes the elastic element 160. The structure of the second piezoelectric element 132 and the elastic element 160 can be referred to Figures 9 to 11 The structure of the first piezoelectric element 132 and the elastic element 160 is shown.

[0081] In summary, the camera lens driving device 100, through the static friction forces generated by the first actuator 116 and the second actuator 118 on the first lens mount 104 and / or the second lens mount 106 respectively, precisely moves the first lens mount 104 and the second lens mount 106 in zoom mode or focus mode. Responding to the fact that the static friction force of the second actuator 118 on the second lens mount 106 is greater than the static friction force of the first actuator 116 on the second lens mount 106, and the static friction force of the first actuator 116 on the second lens mount 106 is greater than the dynamic friction force of the second actuator 118 on the second lens mount 106, during zooming, the first actuator 116 can simultaneously move both the first lens mount 104 and the second lens mount 106 to perform zoom movement. During focusing, the second actuator 118 can move the second lens mount 106 to perform focusing movement.

[0082] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A camera lens driving device, characterized in that, include: A frame body and two guide rail components are respectively located on two sides of the frame body; A first mirror mount is slidably mounted on one side of the two guide rail components; A second mirror mount is slidably mounted on the other side of the two guide rails; and An actuating assembly includes: a first actuator disposed on one side of the frame and clamped to the first lens mount and the second lens mount; and a second actuator disposed on the other side of the frame and clamped to the second lens mount; In response to the static friction force of the second actuator on the second mirror mount being greater than the static friction force of the first actuator on the second mirror mount, and the static friction force of the first actuator on the second mirror mount being greater than the dynamic friction force of the second actuator on the second mirror mount, the first actuator moves the first mirror mount and the second mirror mount, and the second actuator selectively moves the second mirror mount.

2. The camera lens driving device as described in claim 1, characterized in that, in, The first mirror mount has a first clamping member, which has a first clamping portion; the second mirror mount has a second clamping member, which has a second clamping portion and a third clamping portion; wherein, the first actuator is clamped in the first clamping portion and the second clamping portion, and the second actuator is clamped in the third clamping portion.

3. The camera lens driving device as described in claim 2, characterized in that, in, The first actuator includes a first friction rod and a first piezoelectric element. The first piezoelectric element is connected to one end of the first friction rod, and the first clamping part is located between the first piezoelectric element and the second clamping part.

4. The camera lens driving device as described in claim 3, characterized in that, in, The second actuator includes a second friction rod and a second piezoelectric element. The second piezoelectric element is connected to one end of the second friction rod, and the third clamping part is located between the second piezoelectric element and the first clamping part.

5. The camera lens driving device as described in claim 4, characterized in that, in, The first clamping part, the second clamping part, and the third clamping part each have two clamping arms.

6. The camera lens driving device as described in claim 3, characterized in that, in, The first actuator also includes an elastic element connected to the first piezoelectric element, which generates a corresponding deformation in response to the actuation of the first piezoelectric element.

7. The camera lens driving device as described in claim 1, characterized in that, in, The two guide rail components include a first ball bearing assembly and a second ball bearing assembly. The first ball bearing assembly is located on one side of the frame, and the second ball bearing assembly is located on the other side of the frame. The first mirror mount and the second mirror mount slide on the first ball bearing assembly and the second ball bearing assembly.

8. The camera lens driving device as described in claim 1, characterized in that, The device includes a controller electrically connected to the first actuator and the second actuator for generating a first control signal and a second control signal; the first actuator generates a first movement according to the first control signal, the second actuator generates a second movement according to the first control signal to generate dynamic friction force on the second mirror mount; and the second actuator generates a third movement according to the second control signal.

9. The camera lens driving device as described in claim 1, characterized in that, in, The two sides of the first mirror mount are magnetically attracted to the two guide rails, so that it slides on one side of the two guide rails; the two sides of the second mirror mount are magnetically attracted to the two guide rails, so that it slides on the other side of the two guide rails.

10. The camera lens driving device as claimed in claim 1, characterized in that, in, The first mirror mount has a first sliding groove and a second sliding groove on each of its two sides. The first sliding groove is slidably disposed on one of the two guide rails, and the second sliding groove is slidably disposed on the other of the two guide rails. The first sliding groove is one of a U-shape and a V-shape, and the second sliding groove is the other of a U-shape and a V-shape.

Images