Linear actuator and camera lens assembly using same

Abstract

This camera lens assembly comprises: at least one lens; a lens housing for accommodating the lens; a pair of shafts installed parallel to the optical axis inside the lens housing; a lens holder on which the lens is mounted, and which can move together with the lens in the optical axis direction relative to the lens housing and has a pair of first grooves that are in contact with a portion of the pair of shafts and are formed in the optical axis direction; and a guide member which is fixed to one side of the lens housing and guides the movement of the lens holder in the optical axis direction. Here, one of the pair of first grooves is in line contact at two places with one of the pair of shafts, and the other of the pair of first grooves is in line contact at one place with the other of the pair of shafts.

Description

Linear actuator and camera lens assembly using the same

[0001] The present invention relates to a linear actuator that provides linear movement, and more particularly, to a linear actuator that can more precisely and stably control the movement of a lens in the direction of the optical axis, and a camera lens assembly using the same.

[0002] Typically, the manual ring on a camera lens is used for manual focus and optical magnification adjustment. When the user rotates the manual ring, a mechanical mechanism causes at least some of the multiple lenses to move linearly along the optical axis, thereby changing their optical characteristics.

[0003] However, as camera optical performance advances, lens diameters tend to increase and their weight increases. Therefore, to linearly move these larger and heavier lenses, not only greater driving power is required, but the linear movement of the lens also needs to be controlled more precisely and stably, without fluctuation or interference.

[0004] The technical problem to be achieved by the present invention is to provide a linear actuator and a camera lens assembly that control the movable lens of the camera to move linearly without fluctuation of the movable lens or interference between parts.

[0005] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0006] According to an embodiment of the present invention for achieving the above technical problem, a camera lens assembly comprises: at least one lens; a lens housing for accommodating the lens; a pair of shafts installed in parallel in the direction of an optical axis within the lens housing; a lens holder for holding the lens and capable of moving together with the lens with respect to the lens housing in the direction of the optical axis, the lens holder having a pair of first grooves formed in the direction of the optical axis in contact with a portion of the pair of shafts; and a guide member fixed to one side within the lens housing and guiding movement of the lens holder in the direction of the optical axis, wherein one of the pair of first grooves is in linear contact with one of the pair of shafts at two points, and the other of the pair of first grooves is in linear contact with the other of the pair of shafts at one point.

[0007] Movement of the above lens holder is triggered by the user's operation of the manual ring.

[0008] The above guide member is formed with a pair of second grooves that contact another part of the pair of shafts.

[0009] Each of the above pair of second grooves is in line contact with a corresponding shaft among the above pair of shafts at two points.

[0010] One of the pair of first grooves is a notched groove extending in the direction of the optical axis, and the other of the pair of first grooves is a trench groove extending in the direction of the optical axis, and the lens holder is automatically aligned in a transverse direction perpendicular to the optical axis by the notched groove, and a margin for transverse error is secured by the trench groove.

[0011] Each of the pair of second grooves is a notched groove extending in the direction of the optical axis, and the guide member is automatically aligned in the transverse direction perpendicular to the optical axis by the notched grooves.

[0012] A yoke is installed in the above guide member and a magnet is installed in the lens holder, so that an attractive force is applied between the lens holder and the guide member with the pair of shafts interposed therebetween, thereby eliminating the play between the pair of shafts and the pair of first grooves.

[0013] A coil forming a closed curve is additionally installed in the above guide member, and the lens holder moves in the direction of the optical axis by the current flowing in the coil.

[0014] The closed curve of the coil is formed in a direction within the plane of the guide member and is installed in the guide member between the yoke and the magnet.

[0015] The magnet is composed of a first magnet piece and a second magnet piece having opposite polarities along a vertical direction perpendicular to the optical axis direction, the first magnet piece being positioned corresponding to a first portion in which current flows in a first direction within the coil, and the second magnet piece being positioned corresponding to a second portion in which current flows in a second direction opposite to the first direction within the coil.

[0016] The above lens holder is moved in the optical axis direction by a cam mechanism.

[0017] In the above lens housing, a first lens group having at least one lens closest to the subject and a third lens group having at least one lens farthest from the subject are fixedly installed, and in the lens holder, a second lens group having at least one lens and capable of moving in the optical axis direction together with the lens holder to adjust focus is fixedly installed.

[0018] At least one of the above lens groups comprises an anamorphic lens in which multiple lenses are joined together.

[0019] The above pair of shafts is prevented from moving in the optical axis direction by stopper walls formed at both ends of the pair of second grooves formed in the guide member, and at this time, when the lens holder moves in the optical axis direction, sliding occurs between the pair of first grooves and the pair of shafts.

[0020] The pair of shafts is limited by stopper walls formed at both ends of the pair of first grooves formed in the lens holder, thereby allowing movement in the optical axis direction by moving together with the lens holder, and at this time, when the lens holder moves in the optical axis direction, sliding occurs between the pair of second grooves and the pair of shafts.

[0021] According to one embodiment of the present invention for achieving the above technical task, a linear actuator comprises: a housing; a pair of shafts installed in parallel in a direction of a moving axis within the housing; a moving member capable of moving in the direction of the moving axis with respect to the housing, and having a pair of first grooves formed in the direction of the moving axis in contact with a portion of the pair of shafts; and a guide member fixed to one side within the housing and guiding movement of the moving member in the direction of the moving axis, wherein one of the pair of first grooves is in line contact with one of the pair of shafts at two points, and the other of the pair of first grooves is in line contact with the other of the pair of shafts at one point.

[0022] The above guide member is formed with a pair of second grooves that contact another part of the pair of shafts.

[0023] One of the pair of first grooves is a notched groove extending in the direction of the moving axis, and the other of the pair of first grooves is a trench groove extending in the direction of the moving axis, and the lens holder is automatically aligned in a transverse direction perpendicular to the moving axis by the notched groove, and a margin for transverse error is secured by the trench groove.

[0024] A yoke is installed on the guide member and a magnet is installed on the movable member, so that an attractive force is applied between the movable member and the guide member with the pair of shafts interposed therebetween, thereby eliminating the play between the pair of shafts and the pair of first grooves.

[0025] A coil forming a closed curve is additionally installed in the guide member, and the moving member moves in the direction of the moving axis by a current flowing in the coil, and the closed curve of the coil is formed in a direction within the plane of the guide member and is installed in the guide member between the yoke and the magnet.

[0026] According to the linear actuator and camera lens assembly according to the present invention, even if an assembly error or thermal deformation error occurs, interference does not occur in the movement of the movable lens.

[0027] In addition, since the force acts between the lens holder having the movable lens and the guide member so that no gap occurs between the two, shaking can be prevented when the movable lens is moved linearly.

[0028] FIG. 1 is a drawing illustrating an assembled shape of a camera lens assembly and a camera body according to one embodiment of the present invention.

[0029] FIG. 2a is a perspective view of a camera lens assembly according to one embodiment of the present invention, and FIG. 2b is an exploded perspective view of the camera lens assembly.

[0030] Figures 3a to 3d are a perspective view, a front view, a plan view, and a right side view, respectively, showing only the linear actuator among the camera lens assembly.

[0031] Fig. 4 is an exploded perspective view of the linear actuator of Fig. 3a.

[0032] Fig. 5a is a perspective view showing only the lens holder among the linear actuators of Fig. 3a, and Fig. 5b is a perspective view showing only the guide member among the linear actuators of Fig. 3b.

[0033] Fig. 6 is a cross-sectional view of the linear actuator of Fig. 3a taken along the BB' direction.

[0034] Fig. 7 is a cross-sectional view of the camera lens assembly of Fig. 2a taken along the AA' direction.

[0035] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0036] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in their common sense to those of ordinary skill in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0037] The terminology used herein is for the purpose of describing embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms, unless specifically stated otherwise. As used herein, the terms "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components in addition to the components mentioned.

[0038] An embodiment of the present invention will be described in detail with reference to the attached drawings below.

[0039] FIG. 1 is a drawing illustrating an assembled shape of a camera lens assembly (100) and a camera body (200) according to one embodiment of the present invention. The optical axis (O) is an axis indicating the center of the light flux from a subject facing the camera lens assembly (100). The camera lens assembly (100) and the camera body (200) can be mutually fixed by a lock pin (not shown) or screw coupling while the contact surfaces of the lens mount (170) and the camera mount (210) are in contact with each other.

[0040] The camera housing (203) is a housing that holds each component of the camera body (200). More specifically, the camera housing (203) may include a camera mount (210), a camera-side electrical connector (209) that serves as a connection between communication units, and a camera mount fixing member (206).

[0041] The lens mount (170) is fixed to the lens housing (90) by a lens mount fixing member (106). The lens-side electrical connector (109) is installed on the camera lens assembly (100) side, and can be fixed to the lens mount (170) by the fixing member (104). Therefore, when the camera lens assembly (100) and the camera body (200) are assembled, the lens-side electrical connector (109) is in electrical contact with the camera-side electrical connector (209), so that the camera lens assembly (100) and the camera body (200) can be in a state where they can communicate with each other.

[0042] FIG. 2a is a perspective view of a camera lens assembly (100) according to one embodiment of the present invention, and FIG. 2b is an exploded perspective view of the camera lens assembly (100).

[0043] For reference, for the definition of direction, FIG. 2a shows the optical axis direction (O) of the camera lens assembly (100), the horizontal direction (H) orthogonal to the optical axis direction (O), and the vertical direction (V) orthogonal to both the optical axis direction (O) and the horizontal direction (H).

[0044] As illustrated in FIG. 2B, the camera lens assembly (100) can be assembled with a front camera housing (91) and a rear camera housing (92) so as to accommodate a linear actuator (190). In addition, a manual ring (95) that can be manually operated by a user is installed on the outer diameter of the housings (91, 92). By manipulating this manual ring (95), the user can move the movable lens inside the camera lens assembly (100) in the optical axis direction (O) to adjust the focus of the camera. For example, the manipulation of this manual ring (95) generates an electrical signal, and the movement of the movable lens in the optical axis direction (O) can be controlled according to the electrical signal. However, the present invention is not limited thereto, and a known cam mechanism may be mechanically operated according to the manipulation of the manual ring (95) to control the movement of the movable lens in the optical axis direction (O).

[0045] Meanwhile, an outer lens (10a) is placed on the front of the camera lens assembly (100), and an LED indicator (15) that indicates whether the camera is currently in operation by changing color can be installed on the upper side of the outer lens (10a).

[0046] The above outer lens (10a) may be an anamorphic lens. An anamorphic lens is a type of special lens that compresses the left and right sides of an image, records it on film or an image sensor, and then, when it is expanded again using a special projector or digital processing, shows a wider angle of view and shallower depth of field than when using a regular lens. In addition, since it uses the entire area of ​​the film, it is known to provide better image quality than when a scope ratio is created by cropping.

[0047] FIGS. 3A to 3D are a perspective view, a front view, a plan view, and a right side view, respectively, showing only the linear actuator (190) among the camera lens assembly (100).

[0048] As shown, the linear actuator (190) is composed of a guide member (120) fixed to one side of the camera housing (91, 92) and a lens holder (110) that can move in the optical axis direction (O) with respect to the guide member (120). A movable lens (10b) that can move together with the lens holder (110) is arranged in the lens holder (110). Consequently, as the movable lens (10b) moves in the optical axis direction (O) in this way, the focus of the camera can be adjusted.

[0049] Fig. 4 is an exploded perspective view of the linear actuator (190) of Fig. 3a.

[0050] As described above, the linear actuator (190) is composed of a guide member (120) and a lens holder (110) that is movable with respect to the guide member (120).

[0051] After a yoke (20) is seated in a seating groove (122) formed on the upper surface of a guide member (120), the yoke (20) can be closed by a cap (121). The yoke (20) can be made of, for example, a ferromagnetic material.

[0052] In addition, a coil (60) forming a closed curve is additionally installed on the lower surface of the guide member (120). At this time, the closed curve of the coil (60) can be formed in a direction within the plane of the guide member (120). When the direction of the current flowing in the coil (60) is switched, the lens holder (110) moves in the optical axis direction (O) or the opposite direction. The coil (60) can be manufactured by winding a single coil multiple times in a bobbin-less structure. In addition, an adhesive applied to the outer side of the wound coil can be heated to make it into a solid member (self-bonding type).

[0053] Meanwhile, a magnet (30) is mounted in a mounting groove (112) formed on the upper surface of the lens holder (110). Accordingly, it is positioned between the yoke (20) installed in the guide member (120) and the magnet (30) installed on the upper portion of the lens holder (110).

[0054] At this time, when current is supplied to the coil (60), the direction of the magnetic field and the direction of the current are perpendicular to each other due to the magnet (30) located below the coil (60). However, the direction of the current flowing in the first part (61) of the coil (60) and the direction of the current flowing in the second part (62) of the coil (60) are opposite to each other with respect to the horizontal direction (H), so if a magnetic field is formed in the same direction in the two parts (61, 62), the directions of the generated thrust will be opposite to each other and cancel each other out.

[0055] Accordingly, the magnet (30) is composed of a first magnet piece (31) and a second magnet piece (32), and each of the magnet pieces (31, 32) has opposite polarities along a vertical direction (V) perpendicular to the optical axis direction (O). In addition, the first magnet piece (31) is arranged at a position corresponding to a first part (61) in which current flows in a first direction within the coil (60), and the second magnet piece (32) is arranged at a position corresponding to a second part (62) in which current flows in a second direction opposite to the first direction within the coil (60). By this configuration, the thrust generated from the first magnet piece (31) and the first part (61) of the coil (60) and the thrust generated from the second magnet piece (32) and the second part (62) of the coil (60) act in the same direction, and accordingly, the lens holder (110) can move in the optical axis direction (O) or in the opposite direction. The magnet (30) may be composed of a plurality of monopole magnet pieces, but a multi-pole magnet having a cross section of two or more poles may also be used.

[0056] Meanwhile, a pair of shafts (50a, 50b) are interposed between the guide member (120) and the lens holder (110). The lower side of the shaft (50a, 50b) may be engaged with a pair of first grooves (115a, 115b) formed on the upper surface of the lens holder (110) while being in contact with them, and the upper side of the shaft (50a, 50b) may be engaged with a pair of second grooves (125a, 125b) formed on the lower surface of the guide member (120) while being in contact with them. The pair of first grooves (115a, 115b) are illustrated in more detail in FIG. 5a described below, and the pair of second grooves (125a, 125b) are illustrated in more detail in FIG. 5b described below.

[0057] In the above Fig. 4, a magnet (30) composed of two magnet pieces (31, 32) and a single coil (60) are exemplified. However, this is not limited to this, and a magnet composed of four magnet pieces with opposite polarities between adjacent magnet pieces and two coils may also be used.

[0058] FIG. 5a is a perspective view showing only the lens holder (110) among the linear actuators (190) of FIG. 3a, and FIG. 5b is a perspective view showing only the guide member (120) among the linear actuators (190) of FIG. 3b.

[0059] A pair of shafts (50a, 50b) illustrated in Fig. 4 may be limited by stopper walls (113) formed at both ends of a pair of first grooves (115a, 115b) formed in the lens holder (110). Accordingly, movement in the optical axis direction (O) is permitted by moving together with the lens holder (110). At this time, when the lens holder (110) moves in the optical axis direction (O), sliding occurs between the pair of second grooves (125a, 125b) and the pair of shafts (50a, 50b).

[0060] However, without being limited thereto, the pair of shafts (50a, 50b) may be prevented from moving in the optical axis direction (O) by a stopper wall (not shown) formed at both ends of a pair of second grooves (125a, 125b) of the guide member (120) instead of the stopper wall (113). In this case, when the lens holder (110) moves in the optical axis direction (O), sliding will occur between the pair of first grooves (115a, 115b) and the pair of shafts (50a, 50b).

[0061] Fig. 6 is a cross-sectional view of the linear actuator (190) of Fig. 3a cut along the BB' direction.

[0062] A linear actuator (190) may be configured to include a lens (10), a pair of shafts (50a, 50b), a lens holder (110), and a guide member (120).

[0063] The above lens (10b) is a movable lens that is fixedly installed in a lens holder (110) and can move together with the lens holder (110), and may be, for example, an anamorphic lens.

[0064] The above pair of shafts (50a, 50b) are installed parallel to the optical axis direction (O) within the lens housing (91, 92).

[0065] The lens holder (110) holds the lens (10b) and can move together with the lens (10b) in the optical axis direction (O) with respect to the lens housing (90). The lens holder (110) has a pair of first grooves (115a, 115b) formed in the optical axis direction (O) that come into contact with a portion (lower side) of the pair of shafts (50a, 50b).

[0066] A camera lens assembly (100) including a guide member (120) fixed to one side of the lens housing (90: 91, 92) and guiding movement in the optical axis direction (O) of the lens holder (110),

[0067] One (115a) of the pair of first grooves (115a, 115b) is in line contact with one (50a) of the pair of shafts (50a, 50b) at two points, and the other (115b) of the pair of first grooves (115a, 115b) is in line contact with the other (50b) of the pair of shafts (50a, 50b) at one point.

[0068] On the other hand, the guide member (120) is formed with a pair of second grooves (125a, 125b) that contact another part (upper side) of the pair of shafts (50a, 50b). Each of the pair of second grooves (125a, 125b) is in line contact with a corresponding shaft (50a, 50b) among the pair of shafts (50a, 50b) at two points.

[0069] At this time, among the pair of first grooves (115a, 115b), one (115a) is a notch-typed groove (115a) extending in the optical axis direction (O), and the other (115b) among the pair of first grooves (115a, 115b) is a trench-typed groove (115b) extending in the optical axis direction (O). The notch-type refers to a shape whose width narrows in the depth direction, such as a V-shape or a U-shape, and the trench-typed groove refers to a shape having a substantially constant width in the depth direction, such as a square. However, as long as it is a shape that makes line contact at one point, it is not limited to the notch-type, and as long as it is a shape that makes line contact at two points, it is not limited to the trench-type.

[0070] The above lens holder (110) is automatically aligned in the horizontal direction (H) by the notched groove (115a). Even if the shaft (50a) having a circular cross-section deviates slightly in the horizontal direction (H) during assembly or use, its center is automatically aligned by the notched groove (115a) whose width becomes narrower in the depth direction.

[0071] In addition, clearance for the horizontal direction (H) error is secured by the trench-shaped groove (115b). Since the lower end of the shaft (50b) having a circular cross-section is in line contact with the trench-shaped groove (115b) at one point, even if the position of the shaft (50b) is slightly changed in the horizontal direction (H) due to an error occurring during assembly or an error due to thermal deformation during use, interference does not occur, and thus movement of the lens holder (110) in the optical axis direction (O) is not hindered. If both of the pair of first grooves (115a, 115b) are notch-shaped grooves, interference due to the above error will occur, hindering the movement of the lens holder (110).

[0072] And, each of the pair of second grooves (125a, 125b) is a notch-shaped groove (125a, 125b) extending in the optical axis direction (O), and the guide member (120) is automatically aligned in the horizontal direction (H) perpendicular to the optical axis (O) by the notch-shaped grooves (125a, 125b). Unlike the lens holder (110), the guide member (120) does not move, and therefore does not require a trench-shaped groove to eliminate interference due to error.

[0073] Meanwhile, a yoke (20) is installed on the guide member (120) and a magnet (30) is installed on the lens holder (110), so that an attractive force acts between the lens holder (110) and the guide member (120) with the pair of shafts (50a, 50b) therebetween, thereby eliminating a gap between the pair of shafts (50a, 50b) and the pair of first grooves (115a, 115b). Due to the elimination of this gap, shaking can be prevented when the lens holder (110) moves in the optical axis direction (O).

[0074] Fig. 7 is a cross-sectional view of the camera lens assembly (100) of Fig. 2a taken along the AA' direction.

[0075] As illustrated, a first lens group (15a) having an outer lens (10a: 10a1, 10b2) closest to a subject and a third lens group (15c) having at least a rear lens (10c: 10c1, 10c2) furthest from the subject are fixedly installed in the first lens housing (91). In addition, a second lens group (15b) including a movable lens (10b: 10b1, 10b2, 10b3, 10b4) and capable of moving in the optical axis direction (O) together with a lens holder (110) to adjust a focus is fixedly installed in the lens holder (110).

[0076] For example, the outer lens (10a) may be a cemented lens of two lenses, and the rear lens (10c) may also be a cemented lens of two lenses. In addition, the movable lens (10b) may each include two cemented lenses of two lenses (10b1, 10b2 or 10b3, 10b4).

[0077] In the above description, the linear actuator (190) was used for the purpose of driving a lens holder (110) equipped with a movable lens. However, this is not limited to this, and the linear actuator (190) can also be applied for the purpose of controlling the movement of a specific movable member in one direction. Accordingly, the lens holder (110) can be viewed as an example of a movable member.

[0078] Although the embodiments of the present invention have been described with reference to the attached drawings, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. At least one lens; A lens housing accommodating the above lens; A pair of shafts installed parallel to the optical axis within the lens housing; A lens holder having a pair of first grooves formed in the optical axis direction, the first grooves being movable in the optical axis direction with respect to the lens housing together with the lens, and contacting a part of the pair of shafts; and A camera lens assembly including a guide member fixed to one side of the lens housing and guiding movement of the lens holder in the optical axis direction, A camera lens assembly, wherein one of the pair of first grooves is in line contact with one of the pair of shafts at two points, and the other of the pair of first grooves is in line contact with the other of the pair of shafts at one point.

2. In paragraph 1, A camera lens assembly, wherein movement of the lens holder is triggered by the user's operation of a manual ring.

3. In paragraph 2, A camera lens assembly, wherein the guide member has a pair of second grooves formed therein, the second grooves contacting another portion of the pair of shafts.

4. In paragraph 3, A camera lens assembly, wherein each of the second grooves of the pair is in line contact with a corresponding shaft among the pair of shafts at two points.

5. In paragraph 4, One of the pair of first grooves is a notch-shaped groove extending in the optical axis direction, and the other of the pair of first grooves is a trench-shaped groove extending in the optical axis direction. A camera lens assembly, wherein the lens holder is automatically aligned in a horizontal direction perpendicular to the optical axis by the notched groove, and a margin for horizontal error is secured by the trench groove.

6. In paragraph 5, Each of the above pair of second grooves is a notched groove extending in the optical axis direction, A camera lens assembly in which the guide member is automatically aligned in a horizontal direction perpendicular to the optical axis by the notched grooves.

7. In paragraph 1, A camera lens assembly, wherein a yoke is installed in the guide member and a magnet is installed in the lens holder, so that an attractive force is applied between the lens holder and the guide member with the pair of shafts interposed therebetween, thereby eliminating a gap between the pair of shafts and the pair of first grooves.

8. In paragraph 7, A camera lens assembly, wherein a coil forming a closed curve is additionally installed in the guide member, and the lens holder moves in the direction of the optical axis by current flowing in the coil.

9. In paragraph 8, A camera lens assembly, wherein the closed curve of the coil is formed in a direction within the plane of the guide member and is installed in the guide member between the yoke and the magnet.

10. In paragraph 9, The above magnet is composed of a first magnet piece and a second magnet piece with opposite polarities along a vertical direction perpendicular to the optical axis direction, A camera lens assembly, wherein the first magnet piece is positioned at a position corresponding to a first portion within the coil in which current flows in a first direction, and the second magnet piece is positioned at a position corresponding to a second portion within the coil in which current flows in a second direction opposite to the first direction.

11. In paragraph 7, A camera lens assembly, wherein the lens holder moves in the optical axis direction by a cam mechanism.

12. In paragraph 1, In the above lens housing, a first lens group having at least one lens closest to the subject and a third lens group having at least one lens farthest from the subject are fixedly installed, A camera lens assembly, wherein a second lens group having at least one lens and capable of moving in the optical axis direction together with the lens holder and adjusting a focus is fixedly installed in the lens holder.

13. In paragraph 11, A camera lens assembly, wherein at least one of the above lens groups comprises an anamorphic lens in which multiple lenses are joined together.

14. In paragraph 1, The above pair of shafts are prevented from moving in the optical axis direction by stopper walls formed at both ends of the above pair of second grooves formed in the above guide member. A camera lens assembly, wherein sliding occurs between the pair of first grooves and the pair of shafts when the lens holder moves in the optical axis direction at this time.

15. In paragraph 1, The above pair of shafts are limited by stopper walls formed at both ends of the above pair of first grooves formed in the lens holder, and thus are allowed to move in the direction of the optical axis by moving together with the lens holder. A camera lens assembly, wherein sliding occurs between the pair of second grooves and the pair of shafts when the lens holder moves in the optical axis direction at this time.

16. Housing; A pair of shafts installed parallel to the moving axis direction within the housing; A movable member having a pair of first grooves formed in the direction of the movable axis and capable of moving in the direction of the movable axis relative to the housing and in contact with a part of the pair of shafts; and A linear actuator including a guide member fixed to one side of the housing and guiding movement of the movable member in the direction of the movable axis, A linear actuator, wherein one of the pair of first grooves is in line contact with one of the pair of shafts at two points, and the other of the pair of first grooves is in line contact with the other of the pair of shafts at one point.

17. In paragraph 16, A linear actuator, wherein the guide member has a pair of second grooves formed therein, the second grooves contacting another portion of the pair of shafts.

18. In paragraph 17, One of the pair of first grooves is a notched groove extending in the direction of the moving axis, and the other of the pair of first grooves is a trench groove extending in the direction of the moving axis. A linear actuator in which the lens holder is automatically aligned in a transverse direction perpendicular to the moving axis by the notched groove, and a margin for transverse error is secured by the trench groove.

19. In paragraph 18, A linear actuator in which a yoke is installed in the guide member and a magnet is installed in the moving member, so that an attractive force is applied between the moving member and the guide member with the pair of shafts interposed therebetween, thereby eliminating the play between the pair of shafts and the pair of first grooves.

20. In paragraph 19, A coil forming a closed curve is additionally installed in the guide member, and the moving member moves in the direction of the moving axis by the current flowing in the coil. A linear actuator, wherein the closed curve of the coil is formed in a direction within the plane of the guide member and is installed in the guide member between the yoke and the magnet.

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