Actuator for driving zoom

Abstract

The present invention provides a zoom driving actuator comprising: a first carrier including a first mounter on which a first lens assembly is mounted, a first support member provided on one side of the first mounter and extending in a first direction, and a first guide member provided on the other side of the first mounter and extending in a first direction; a second carrier including a second mounter on which a second lens assembly is mounted, a second support member provided on one side of the second mounter and extending in a second direction opposite to the first direction, and a second guide member provided on the other side of the second mounter and extending in a second direction; a first passage provided between the first mounter and the first support member and into which the second guide member is inserted; a second passage provided between the second mounter and the second support member and into which the first guide member is inserted; and first and second dampers provided on the first and second guide members, respectively, and limiting the separation distance between the first and second carriers.

Description

Technology Field

[0001] The present invention relates to a zoom driving actuator, and more specifically, to a zoom driving actuator that can prevent collisions caused by mutual interference between two carriers by limiting the distance between two carriers. Background Technology

[0003] As hardware technology for image processing advances and user demand for video recording increases, features such as autofocus (AF) and optical image stabilization (OIS) are being implemented not only in standalone camera devices but also in camera modules mounted on mobile terminals such as mobile phones and smartphones.

[0004] In addition, actuators for zoom lenses that can vary the size of a subject by adjusting the focal length through zoom-in and zoom-out functions have recently been disclosed, and actuators that implement a more diverse range of zoom functions by combining the mutual positional relationships of multiple lenses (lens assemblies) according to embodiments have also been disclosed.

[0005] In the case of such zoom lens actuators, since the travel distance (also referred to as the stroke) of the zoom lens moving along the optical axis is extended or expanded compared to a standard lens, they must be designed to ensure a corresponding driving force.

[0006] However, in the case of conventional actuators, the physical structure driving the carriers is designed to be implemented simply as multiple units so that each of the multiple carriers has its own independent movement space.

[0007] Therefore, in the case of conventional actuators, the size of the actuator itself becomes excessive, making it difficult to apply them to application devices such as smartphones where size or volume is an important issue. The problem to be solved

[0009] The present invention was devised to solve the aforementioned problems against the background described above, and aims to provide a zoom drive actuator that not only maintains more stable operation of each carrier but also enables more effective spatial utilization of the actuator.

[0010] In addition, the present invention aims to provide a zoom drive actuator capable of minimizing noise and impact caused by contact between the carrier and the housing during carrier movement.

[0011] In addition, the present invention aims to provide a zoom drive actuator that can prevent collisions caused by mutual interference between two carriers by limiting the distance between two carriers.

[0012] Other objects and advantages of the invention may be understood from the description below and will become more clearly known from the embodiments of the invention. Furthermore, the objects and advantages of the invention may be realized by the configurations set forth in the claims and combinations thereof. means of solving the problem

[0014] To achieve the above objective, the present invention provides a zoom driving actuator comprising: a first carrier including a first mounter on which a first lens assembly is mounted, a first support member provided on one side of the first mounter and extending in a first direction, and a first guide member provided on the other side of the first mounter and extending in a first direction; a second carrier including a second mounter on which a second lens assembly is mounted, a second support member provided on one side of the second mounter and extending in a second direction opposite to the first direction, and a second guide member provided on the other side of the second mounter and extending in a second direction; a first passage provided between the first mounter and the first support member and into which the second guide member is inserted; a second passage provided between the second mounter and the second support member and into which the first guide member is inserted; and first and second dampers provided on the first and second guide members, respectively, and limiting the separation distance between the first and second carriers.

[0015] Here, the first guider includes a first connecting part connected to a first mounter and a first extension part extending from the first mounter, and the second guider includes a second connecting part connected to a second mounter and a second extension part extending from the second mounter.

[0016] In addition, the first damper is provided on the front of the first connection part, and the second damper is provided on the front of the second connection part.

[0017] In addition, the first support member includes a first groove in which the second damper can move, and a first stopper that restricts the movement of the second damper.

[0018] Additionally, the second support member includes a second groove in which the first damper can move, and a second stopper that restricts the movement of the first damper.

[0019] In addition, the first damper has a first protrusion that protrudes toward the second support and is seated in the second groove.

[0020] In addition, the second damper has a second protrusion that protrudes toward the first support and is seated in the first groove.

[0021] Additionally, the second support member further includes a third damper facing the first damper, and the first support member further includes a fourth damper facing the second damper.

[0022] In addition, the zoom driving actuator of the present invention further includes first and second magnets mounted respectively on first and second support members, and first and second coil members facing respectively the first and second magnets.

[0023] Additionally, the zoom driving actuator of the present invention further includes a housing that accommodates first and second carriers and includes first to fourth guide rails.

[0024] Here, the first support member is provided with a first ball rail facing the first guide rail, and the first guider is provided with a second ball rail facing the second guide rail.

[0025] Additionally, the second support member is provided with a third ball rail facing the third guide rail, and the second guider is provided with a fourth ball rail facing the fourth guide rail. Effects of the invention

[0027] According to one embodiment of the present invention, by implementing the physical structures of a plurality of carriers symmetrically in opposite directions, the independent movement range of each lens (lens assembly) mounted on each carrier can be sufficiently secured.

[0028] According to one embodiment of the present invention, by improving the physical structure in such a way that parts of each carrier intersect or overlap each other, independent movement of each of the multiple carriers can be effectively secured, and the structure and shape of the entire device can be implemented in a more space-intensive form, thereby further optimizing for minimizing the overall space and thereby miniaturizing the mobile terminal.

[0029] According to one embodiment of the present invention, by providing a magnet mounting space that is mutually asymmetrical to each carrier based on the space where the lens is mounted, a magnet of sufficient size can be provided in each carrier, thereby more effectively increasing the driving force of each carrier.

[0030] According to one embodiment of the present invention, by limiting the distance between two carriers, it is possible to prevent the two carriers from moving away from each other and exposing all stacked guide rails, thereby preventing mutual interference between the two carriers and preventing the two carriers from colliding with each other. Brief explanation of the drawing

[0032] FIG. 1 is a drawing illustrating the overall configuration of a zoom driving actuator and a camera module according to an embodiment of the present invention. FIGS. 2 and FIGS. 3 are drawings illustrating the overall configuration of a zoom driving actuator according to an embodiment of the present invention. FIG. 4 is an exploded perspective view of the first carrier and the second carrier of a zoom driving actuator according to an embodiment of the present invention. FIGS. 5 and 6 are drawings illustrating the mutual driving relationship between the first carrier and the second carrier of a zoom driving actuator according to an embodiment of the present invention. FIG. 7 is a drawing illustrating the structure of a ball rail formed on a carrier and a guide rail formed on a housing in a zoom driving actuator according to an embodiment of the present invention. FIG. 8 is a drawing illustrating a comparative example of a zoom driving actuator according to an embodiment of the present invention, in which there is no configuration limiting the distance between the first and second carriers. FIG. 9 is a drawing for explaining a configuration that limits the separation distance between the first and second carriers of a zoom driving actuator according to an embodiment of the present invention. Specific details for implementing the invention

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0034] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0036] FIG. 1 is a drawing illustrating the overall configuration of a zoom driving actuator and a camera module according to an embodiment of the present invention, and FIG. 2 and FIG. 3 are drawings illustrating the overall configuration of a zoom driving actuator according to an embodiment of the present invention.

[0037] Hereinafter, the overall configuration of a zoom driving actuator according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

[0038] The zoom driving actuator (100) of the present invention can be implemented as a single device itself, and can also be implemented as a camera module (1000) together with a reflector module (200), etc., as shown in FIG. 1.

[0039] The zoom driving actuator (100) of the present invention corresponds to an actuator that implements autofocus (AF) or zoom by linearly moving each of a plurality of carriers equipped with a lens assembly in the direction of the optical axis as described below.

[0040] The reflector module (200) may be provided in front of or above (relative to the optical axis direction) the zoom drive actuator (100) and performs the function of reflecting or refracting the light path (Z1) of the subject into a path (Z) in the direction of the lens. The light reflected or refracted in the direction of the optical axis in this way passes through a lens assembly provided in a carrier and flows into an image sensor such as a CMOS, CCD, etc.

[0041] In this way, the reflector module (200) that changes the path of light may include a reflector (210) which may be composed of one selected from a mirror or a prism or a combination thereof. This reflector (210) may be implemented by various components capable of changing the direction of the optical axis of light introduced from the outside, but it is preferable to implement it with a glass material to improve optical performance.

[0042] The camera module (1000) of the present invention, which includes a reflector module (200) and the like, is configured to refract the path of light so that light enters in the direction of the lens. Therefore, the device itself can be installed in the length direction rather than in the thickness direction of the portable terminal, so that the thickness of the portable terminal is not increased, and thus it can be optimized for miniaturization or slimming of the portable terminal.

[0043] Depending on the embodiment, the reflector (210) may be configured to rotate by means of a driving means that generates magnetic force, such as a magnet and a coil. When the reflector (210) moves or rotates in this way, the light of the subject reflected (refracted) through the reflector (210) moves in the ±Y direction and / or ±X direction and is incident on the lens and the imaging element, so that correction of the X-axis and / or Y-axis direction caused by hand shake can be implemented.

[0044] The light from the subject reflected through the reflection module (200) is incident on the first lens assembly (60) and the second lens assembly (70) provided inside the zoom drive actuator (100), and in this process, the positions (relative to the optical axis direction) of the first lens assembly (60) and the second lens assembly (70) are combined to implement functions such as zoom or AF.

[0045] Depending on the embodiment, in order to improve optical performance such as the zoom magnification of the actuator (100), a fixed lens assembly (50) may be provided in front of the actuator (100) (relative to the optical axis direction), as illustrated in FIG. 1.

[0046] In the following description of the present invention, the directional axis corresponding to the path through which light enters the first lens assembly (60), etc., is defined as the optical axis (Z-axis), and two axes on a plane perpendicular to this optical axis (Z-axis) are defined as the X-axis and the Y-axis.

[0047] The fixed lens assembly (50), the first lens assembly (60), and the second lens assembly (70) may consist of one or more lenses or optical units and housings, but the drawing shows the fixed lens assembly (50), the first lens assembly (60), and the second lens assembly (70) without lenses mounted thereon so that the internal configuration can be shown more clearly.

[0048] The zoom driving actuator (100) of the present invention comprises a housing (110) that corresponds to the basic frame structure of the actuator (100) and accommodates an internal configuration, a case (190) that is coupled to the housing (110) and can function as a shield can, a first carrier (120), and a second carrier (130).

[0049] The first carrier (120) on which the first lens assembly (60) is mounted and the second carrier (130) on which the second lens assembly (70) is mounted each correspond to a moving body that moves linearly in the direction of the optical axis (Z-axis direction), and the housing (110) corresponds to a fixed body in a corresponding relative view.

[0050] A second lens assembly (70) is mounted on a second carrier (130), such that the second lens assembly (70) is positioned above or below the first lens assembly (60) with respect to the optical axis direction, and in this state, the second carrier (130) moves linearly in the optical axis direction.

[0051] As described below, the first carrier (120) is provided with a first magnet (M1), and the housing (110) side is provided with a first coil part (not shown) that faces the first magnet (M1) and provides driving force to the first magnet (M1).

[0052] When power of an appropriate size and direction is applied to the first coil section by the control of the first driving driver (not shown), an electromagnetic force is generated between the first coil section and the first magnet (M1), and the first carrier (120) moves back and forth in the direction of the optical axis by this generated electromagnetic force. The first coil section, etc., may be provided on the open surface of the housing (110) in a form mounted on a circuit board.

[0053] In a similar view, when a second driving driver (not shown) controls power of appropriate size and direction to be applied to a second coil section (not shown), the second carrier (130) moves linearly in the direction of the optical axis due to the electromagnetic force generated between the second magnet (M2) provided in the second carrier (130) and the second coil section. The second coil section, etc., may be provided on an open surface of the housing (110) in a form mounted on a circuit board.

[0054] The drawing illustrates a first carrier (120) equipped with a first lens assembly (60) and a second carrier (130) equipped with a second lens assembly (70), but this is one embodiment, and it is obvious that a larger number of lens assemblies and carriers may be provided depending on the embodiment.

[0055] For the sake of efficiency of explanation, the carriers provided in the zoom drive actuator (100) are exemplified as two carriers, and the carrier located at the top (front) based on the optical axis direction of FIG. 2 is referred to as the first carrier (120), and the carrier located at the bottom (rear) is referred to as the second carrier (130).

[0056] In this way, when the first carrier (120) and the second carrier (130) each move linearly in the direction of the optical axis, the lens assembly mounted on each carrier also moves linearly in the direction of the optical axis, and the AF or zoom function is implemented by the relative positional relationship of these lenses.

[0057] As previously described, a fixed lens assembly (50) may be provided in front of the first lens assembly (60) according to the embodiment to match the optical performance or specifications of the zoom drive actuator (100).

[0058] Meanwhile, it is preferable that a ball be positioned between the first carrier (120) and the housing (110) and between the second carrier (130) and the housing (110) so that the first carrier (120) and the second carrier (130) can move more flexibly linearly with minimized friction.

[0059] On the lower surface (YZ plane) of the housing (110), a metal yoke is provided to generate an attractive force with the first magnet (M1) and the second magnet (M2), thereby inducing the first carrier (120) and the second carrier (130) to be in close contact toward the housing (110) with the ball in between.

[0061] FIG. 4 is an exploded perspective view of a first carrier and a second carrier of a zoom drive actuator according to an embodiment of the present invention, FIG. 5 and FIG. 6 are drawings illustrating the mutual driving relationship between the first carrier and the second carrier of a zoom drive actuator according to an embodiment of the present invention, and FIG. 7 is a drawing illustrating the structure of a ball rail formed on a carrier and a guide rail formed on a housing in a zoom drive actuator according to an embodiment of the present invention.

[0062] Hereinafter, with reference to FIGS. 4 to 7, the coupling relationship and mutual driving relationship between the first carrier and the second carrier of a zoom driving actuator according to an embodiment of the present invention will be explained.

[0063] As described above, the first carrier (120) on which the first lens assembly (60) is mounted is a movable body that moves linearly in the direction of the optical axis, and specifically includes a first mounter (121) on which the first lens assembly (60) is mounted, a first support member (123) on which the first magnet (M1) is mounted, and a first guider (125).

[0064] As illustrated in the drawing, the first mounter (121) is provided with a space corresponding to the shape of the first lens assembly (60) so that the first lens assembly (60) is mounted thereon, and depending on the embodiment, a case may be provided on the upper part of the first mounter (121) to prevent the first lens assembly (60) from deviating in the X-axis direction, etc.

[0065] The first support member (123), on which the first magnet (M1) is mounted, is provided on either the left or right side of the first mounter (121) and extends in the first direction. That is, the first support member (123) has a shape that extends beyond the optical axis length of the first mounter (121) with respect to the optical axis direction.

[0066] The first support member (123) may be formed integrally with the first mounter (121), and in order to implement a physical structure that is mutually symmetrical with the second support member (135) of the second carrier (130) described later, it is preferable to have a shape that extends in either the optical axis direction (Z-axis direction).

[0067] As such, the first support member (123) of the present invention is configured to have a shape extended in the direction of the optical axis, so that a first magnet (M1) of a size corresponding to the extended area can be mounted, thereby further increasing the driving force of the first carrier (120).

[0068] Additionally, a first ball rail (128) may be formed in the first support member (123) facing the first guide rail (111) formed in the housing (110). In this case, a ball is arranged to be received between the first guide rail (111) and the first ball rail (128).

[0069] The first guide (125) is provided on the other side of the first mounter (121), either the left or right side, where the first support member (123) is not provided, and extends in the first direction. That is, the first guide (123) may be formed in a bar shape having a lower height (relative to the X-axis) than the first support member (123) and extending further than the optical axis length of the first mounter (121).

[0070] A second ball rail (129) is formed in the first guide (125) and faces the second guide rail (112) formed in the housing (110), and is arranged in such a way that a ball is received between the second guide rail (112) and the second ball rail (129) of the present invention.

[0071] In this way, the first carrier (120) is positioned on the left and right sides respectively with respect to the first mounter (121), and the first support member (123) and the first guide (125), which have a shape that is extended beyond the first mounter (121) with respect to the optical axis direction, can more stably support the movement of the first lens assembly (60) in the optical axis direction.

[0072] As previously described, the first magnet (M1) provided on the first support portion (123) of the first carrier (120) generates a force with the yoke provided on the housing (110).

[0073] Therefore, the first carrier (120) of the present invention maintains overall equilibrium due to the attractive force between the first magnet (M1) and the yoke and is pressed in the direction of the housing (110), so that physical guiding by the ball can be implemented more stably.

[0074] The second carrier (130) has a physical structure corresponding to the first carrier (120) described above, but is structured to be mutually symmetrical with the first carrier (120) in opposite directions as shown in the drawing.

[0075] Specifically, the second carrier (130) includes a second mounter (131) on which the second lens assembly (70) is mounted, a second support member (133) on which the second magnet (M2) is mounted, and a second guide (135).

[0076] The second support member (133) of the second carrier (130) is provided on either the left or right side of the second mounter (131), and is provided in a direction opposite to the direction in which the first support member (123) of the first carrier (120) described above is provided, and extends in a second direction opposite to the first direction. That is, the second support member (133) has a shape that extends longer than the length of the second mounter (131) in the optical axis direction, and has a shape that extends in a direction opposite to the direction in which the first support member (123) of the first carrier (120) is extended.

[0077] In this way, the first carrier (120) and the second carrier (130) have a similar physical structure overall, but by positioning the first mounter (121) on which the first lens assembly (60) is mounted and the second mounter (131) on which the second lens assembly (70) is mounted in the middle portion, sufficient travel distance for the first and second lens assemblies (60, 70) can be secured.

[0078] At the same time, the first magnet (M1) for driving the first carrier (120) and the second magnet (M2) for driving the second carrier (130) can be installed in a relatively larger size through the first support member (123) and the second support member (133), so that the driving force can be effectively increased.

[0079] A third ball rail (138) may be formed in the second support member (133) facing the third guide rail (113) formed in the housing (110), and in this case, a ball is arranged to be received between the third guide rail (113) and the third ball rail (138).

[0080] The second guide (135) is provided on the other side of the second mounter (131), either the left or right side, where the second support member (133) is not provided, and extends in the second direction. That is, the second guide (135) may be formed in a bar shape that has a lower height (relative to the X-axis) than the second support member (133) and extends further than the optical axis length of the second mounter (131).

[0081] In the second guide (135), a fourth ball rail (139) is formed facing the fourth guide rail (114) formed in the housing (110), and a ball is arranged to be received between the fourth guide rail (114) and the fourth ball rail (139) of the present invention.

[0082] In this way, the second carrier (130) can more stably support the movement of the second lens assembly (70) in the optical axis direction by means of a second support member (133) and a second guide (135) which are located on the left and right sides respectively with respect to the second mounter (131) and have a shape that is extended beyond the second mounter (131) with respect to the optical axis direction.

[0083] The second magnet (M2) provided on the second support part (133) of the second carrier (130) generates a force with the yoke provided on the housing (110).

[0084] Therefore, the second carrier (120) of the present invention maintains overall equilibrium due to the attractive force between the second magnet (M2) and the yoke, and is in close contact with the housing (110), so that physical guiding by the ball can be implemented more stably.

[0085] The first carrier (120) is provided between the first mounter (121) and the first support member (123) and includes a first passage (127) into which a second guide (135) is inserted. Here, the first passage (127) has a shape that extends in the direction of the optical axis so that the second guide (135) of the second carrier (130) can move.

[0086] Correspondingly, the second carrier (130) is provided between the second mounter (131) and the second support member (133) and includes a second passage (137) into which the first guide (125) is inserted. Here, the second passage (137) has a shape that extends in the direction of the optical axis so that the first guide (125) of the first carrier (120) can move.

[0087] Through the physical structure of the first passage (127) of the first carrier (120) and the second passage (137) of the second carrier (130), the first guide (125) of the first carrier (120) is inserted into the second passage (137) of the second carrier (130), and the second guide (135) of the second carrier (130) is inserted into the first passage (127) of the first carrier (120).

[0088] Therefore, the first carrier (120) and the second carrier (130) of the present invention can move independently of each other, and can also be implemented in a physical structure in which parts of each component intersect or are stacked, thereby further increasing space utilization.

[0089] The second guide (135) of the second carrier (130) is located in the first passage (127) of the first carrier (120), and when the second carrier (130) moves, it moves linearly in the direction of the optical axis while receiving physical guidance from the ball.

[0090] In a corresponding view, the first guide (125) of the first carrier (120) is located in the second passage (137) of the second carrier (130), and when the first carrier (120) moves, it moves linearly in the direction of the optical axis while receiving guidance of the ball through the second space (137).

[0091] In this way, since a physical structure is implemented in which parts of the first carrier (120) and the second carrier (130) are mutually stacked or overlapped, independent operation of each is ensured, and at the same time, the overall size can be reduced, thereby further increasing spatial utilization.

[0092] To further enhance the efficiency of this spatial design, it is preferable that the first passage (127) be formed between the first mounter (121) and the first support member (123), and the second passage (137) be formed between the second mounter (131) and the second support member (133).

[0093] Referring to FIG. 7, first to fourth guide rails (111, 112, 113, 114) are formed on the bottom surface (based on the X-axis) of the housing (110).

[0094] The first to fourth guide rails (111 to 114) are configured to guide a ball located between the first and second carriers (120, 130) and the housing (110).

[0095] The first guide rail (111) faces the first ball rail (128) formed on the first support portion (123) of the first carrier (120), and the second guide rail (112) faces the second ball rail (129) formed on the first guide (125) of the first carrier (120).

[0096] The third guide rail (113) faces the third ball rail (138) formed on the second support portion (133) of the second carrier (130), and the fourth guide rail (114) faces the fourth ball rail (139) formed on the second guide (135) of the second carrier (130).

[0097] As described above, the first carrier (120) and the second carrier (130) of the present invention each have a dual shape in which a portion for mounting a lens and a portion for mounting a driving magnet are separated, and the portion for mounting the magnet is extended in the direction of the optical axis, and the first carrier (120) and the second carrier (130) themselves are configured to have physical structures that are symmetrical with respect to different directions.

[0098] Therefore, as previously examined, the structure of the guide rail can be further extended in the direction of the optical axis, and based on this, the distance of movement of the first carrier (120) and the second carrier (130) in the direction of the optical axis can be more effectively extended without interference or physical obstruction during movement.

[0099] To enable effective guiding for linearity, it is preferable that the ball (B) be provided in a form in which a portion thereof is received in one or more of the ball rails (128, 129, 138, 139) and / or guide rails (111, 112, 113, 114).

[0101] FIG. 8 is a drawing illustrating a comparative example of a zoom driving actuator according to an embodiment of the present invention, in which there is no configuration limiting the distance between the first and second carriers, and FIG. 9 is a drawing for explaining a configuration limiting the distance between the first and second carriers of a zoom driving actuator according to an embodiment of the present invention.

[0102] Referring to FIG. 8, a zoom drive actuator (10) without a configuration limiting the distance between the first and second carriers (20, 30) is at risk of the first and second carriers (20, 30) colliding with each other due to mutual interference when the first and second carriers (20, 30) move in a direction away from each other so that all stacked guide rails are exposed to the outside, and then move in a direction closer to each other. And, such a collision may cause adverse effects on the performance of the zoom drive actuator (10).

[0103] To prevent such problems, the zoom driving actuator (100) according to an embodiment of the present invention includes first and second dampers (161, 162) that limit the separation distance of the first and second carriers (120, 130).

[0104] Referring to FIGS. 4 to 6, the first guide (125) of the first carrier (120) includes a first connecting part (125a) connected to the first mounter (121) and a first extension part (125b) extending from the first mounter (121), and the guide (135) of the second carrier (130) includes a second connecting part (135a) connected to the second mounter (131) and a second extension part (135b) extending from the second mounter (131).

[0105] Here, the first damper (161) is provided on the front of the first connecting part (125b) of the first guide (125), and the second damper (162) is provided on the front of the second connecting part (135b) of the second guide (135).

[0106] The first support portion (123) of the first carrier (120) includes a first groove portion (123a) through which the second damper (162) can move, and a first stopper (123b) that restricts the movement of the second damper (162).

[0107] The second support portion (133) of the second carrier (130) includes a second groove portion (133a) through which the first damper (161) can move, and a second stopper (133b) that restricts the movement of the first damper (161).

[0108] The first damper (161) has a first protrusion (161a) that protrudes toward the second support member (133) and is seated in the second groove (133a) of the second support member (133), and the second damper (162) has a second protrusion (162a) that protrudes toward the first support member (123) and is seated in the first groove (123a) of the first support member (123).

[0109] In this way, the first protrusion (161a) is seated in the second groove (133a) to press the second support (133), and the second protrusion (162a) is seated in the first groove (123a) to press the first support (123), thereby minimizing the lifting phenomenon of the first and second carriers (120, 130) when the first and second carriers (120, 130) are moved.

[0110] Referring to FIG. 9, a zoom driving actuator according to an embodiment of the present invention is formed when the first and second carriers (120, 130) move away from each other ((a) (b)), the first protrusion (161a) of the first damper (161) moves along the second groove (133a) of the second support (133) and is stopped by the second stopper (133b), thereby restricting movement, and the second protrusion (162a) of the second damper (162) moves along the first groove (123a) of the first support (123) and is stopped by the first stopper (123b), thereby restricting movement. That is, the separation distance between the first and second carriers (120, 130) is restricted.

[0111] Accordingly, the stacked guide rails ((11, 114), (112, 113)) are not all exposed to the outside, and in this case, even if the first and second carriers (120, 130) move in a direction that brings them closer to each other, mutual interference between the first and second carriers (120, 130) does not occur, thereby preventing the first and second carriers (120, 130) from colliding with each other.

[0112] The second support member (133) further includes a third damper (163) facing the first damper (161), and the first support member (123) further includes a fourth damper (164) facing the second damper (162).

[0113] The housing (110) includes a fifth damper (165) and a sixth damper (166) inside one side, and a seventh damper (167) and an eighth damper (168) inside the other side.

[0114] Additionally, the first carrier (120) includes a ninth damper (169) facing the fifth damper (165) and a tenth damper (170) facing the sixth damper (166). And, the second carrier (130) includes an eleventh damper (171) facing the seventh damper (167) and a twelfth damper (172) facing the eighth damper (168).

[0115] The first to twelfth dampers (161 to 172) may be made of an elastic material, and the dampers facing each other may be formed with the same shape, but are not limited thereto.

[0116] When such first to twelfth dampers (161 to 172) are applied to a zoom drive actuator (100), noise and impact caused by the impact occurring during a collision between the first and second carriers (120, 130) or between the first and second carriers (120, 130) and the housing (110) can be minimized.

[0118] Although the present invention has been described above by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

[0119] In the description of the present invention described above, modifiers such as "first," "second," etc., are merely instrumental conceptual terms used to relatively distinguish components from one another, and should be interpreted as not being used to indicate a specific order, priority, etc.

[0120] Although the drawings and other accompanying materials for the description of the present invention and the illustration of embodiments thereof may be depicted in a somewhat exaggerated form to emphasize or highlight the technical content according to the present invention, it should be interpreted as obvious to a person skilled in the art that various modified applications are possible by considering the aforementioned descriptions and the details illustrated in the drawings. Explanation of the symbols

[0122] 1000 : Camera module 50: Fixed lens assembly 60: First lens assembly 70: Second lens assembly 200: Reflector module 100 : Actuator 110 : Housing 120: 1st Carrier 121: 1st Mounter 123: 1st Support Section 125: 1st Guider 130: Second Carrier 131: Second Mounter 133: 2nd Support Section 135: 2nd Guider 161: 1st damper 162: 2nd damper

Claims

Claim 1 A first carrier comprising a first mounter on which a first lens assembly is mounted, a first support member provided on one side of the first mounter and extending in a first direction, and a first guider provided on the other side of the first mounter and extending in the first direction; a second carrier comprising a second mounter on which a second lens assembly is mounted, a second support member provided on one side of the second mounter and extending in a second direction opposite to the first direction, and a second guider provided on the other side of the second mounter and extending in the second direction; a first passage provided between the first mounter and the first support member and into which the second guider is inserted; a second passage provided between the second mounter and the second support member and into which the first guider is inserted; and first and second dampers provided respectively on the first and second guiders and limiting the separation distance between the first and second carriers, wherein the first support member comprises a first groove portion into which the second damper can move; A zoom drive actuator comprising: a first stopper that restricts the movement of the second damper; a second support portion comprising a second groove portion through which the first damper can move; and a second stopper that restricts the movement of the first damper, wherein the first damper moves along the second groove portion and is caught by the second stopper, thereby restricting its movement, and the second damper moves along the first groove portion and is caught by the first stopper, thereby restricting its movement. Claim 2 A zoom drive actuator according to claim 1, wherein the first guider comprises a first connecting portion connected to the first mounter and a first extension portion extending from the first mounter, and the second guider comprises a second connecting portion connected to the second mounter and a second extension portion extending from the second mounter. Claim 3 In claim 2, the first damper is provided on the front of the first connecting part, and the second damper is provided on the front of the second connecting part, forming a zoom driving actuator. Claim 4 delete Claim 5 delete Claim 6 In claim 1, the first damper is a zoom driving actuator having a first protrusion that protrudes toward the second support and is seated in the second groove. Claim 7 In claim 1, the zoom driving actuator having a second damper that protrudes toward the first support and is seated in the first groove. Claim 8 A zoom drive actuator according to claim 3, wherein the second support member further includes a third damper facing the first damper, and the first support member further includes a fourth damper facing the second damper. Claim 9 A zoom driving actuator according to claim 1, further comprising: first and second magnets mounted respectively on the first and second support members; and first and second coil members facing respectively the first and second magnets. Claim 10 A zoom drive actuator according to claim 1, further comprising a housing that accommodates the first and second carriers and includes first to fourth guide rails. Claim 11 In claim 10, the first support member has a first ball rail facing the first guide rail, and the first guider has a second ball rail facing the second guide rail, forming a zoom drive actuator. Claim 12 A zoom drive actuator according to claim 10, wherein the second support member has a third ball rail facing the third guide rail, and the second guider has a fourth ball rail facing the fourth guide rail.

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