Lens mechanism and lens device

Abstract

For example, the present invention provides a lens mechanism and lens device that can miniaturize the lens mechanism compared to the case where the sensor and adjustment mechanism are arranged outside the fixed member. [Solution] The lens mechanism comprises a lens holding member for holding the lens, a movable member connected to the lens holding member, a fixed member that supports the movable member so that it can move in the optical axis direction, a sensor for detecting the position of the movable member, and an adjustment mechanism for the lens holding member. The sensor and the adjustment mechanism are located inside the fixed member.

Description

Technical Field

[0001] The technology of the present disclosure relates to a lens mechanism and a lens device.

Background Art

[0002] Patent Document 1 discloses a lens barrel having a holding member, a driving member, a first guiding member, a first lens barrel, a second guiding member, a second lens barrel, and an adjusting portion. The holding member holds an optical element and has a first guided portion and a second guided portion. The driving member moves the holding member in the optical axis direction. The first guiding member guides the first guided portion in the optical axis direction. The first lens barrel holds the first guiding portion and is movable in the optical axis direction. The second guiding member guides the second guided portion in the optical axis direction. The second lens barrel holds the second guiding portion. The adjusting portion changes the relative position in a direction orthogonal to the optical axes of the first guiding portion and the second guiding portion.

[0003] Patent Document 2 discloses an optical device having a movable lens held movably. The optical device has a driving means, a position detecting means, an optical axis changing means, and a control means. The driving means drives the movable lens in the optical axis direction. The position detecting means detects the position of the movable lens in the optical axis direction. The optical axis polarization means can change the optical axis direction of the movable lens. The control means performs reference position setting in a state where the optical axis direction is changed in a direction in which at least a part of the light beam incident on the movable lens is blocked by the imaging device by the optical axis changing means, and then detects the positions of one or more movable lenses using the position detecting means.

[0004] Patent Document 3 discloses a lens barrel having a lens holding member, a guide member, and a cam member rotatable around the optical axis. The guide member has a straight groove that guides the movement of the lens holding member in the optical axis direction. The cam member has a cam groove for moving the lens holding member in the optical axis direction. The lens holding member has a plurality of first roller members and a plurality of second roller members. At least one of the plurality of first roller members engages with the straight groove and the cam groove. Each of the plurality of second roller members is in the same phase as each of the plurality of first roller members in the circumferential direction of the lens holding member and is located at a distance in the optical axis direction from each of the plurality of first roller members. The diameter of the second roller member that is in the same phase as at least one of the plurality of first roller members is smaller than the diameter of at least one of the first roller members. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2015-210490 [Patent Document 2] Japanese Patent Publication No. 2015-212774 [Patent Document 3] Japanese Patent Publication No. 2019-040092 [Overview of the project]

[0006] One embodiment of the technology of this disclosure provides a lens mechanism and lens device that can miniaturize the lens mechanism compared to the case where the sensor and adjustment mechanism are arranged outside the fixed member. [Means for solving the problem]

[0007] A first aspect of the technology of this disclosure comprises a lens holding member for holding a lens, a movable member connected to the lens holding member, a fixed member that supports the movable member so as to be movable in the optical axis direction, a sensor for detecting the position of the movable member, and an adjustment mechanism for the lens holding member, wherein the sensor and the adjustment mechanism are a lens mechanism located inside the fixed member.

[0008] A second aspect of the technology of this disclosure is a lens mechanism according to the first aspect, wherein the inner side is the radially inner side of the fixed member.

[0009] A third aspect of the technology of this disclosure is a lens mechanism according to the first aspect, wherein the movable member is connected to the radially outer side of the lens holding member.

[0010] A fourth aspect of the technology of this disclosure is a lens mechanism according to the first aspect, wherein the fixed member is located radially outward of the movable member.

[0011] A fifth aspect of the technology of this disclosure is a lens mechanism according to the first aspect, wherein the adjustment mechanism has a plurality of adjustment members for adjusting the angle of the lens holding member.

[0012] A sixth aspect of the technology of this disclosure is a lens mechanism according to the fifth aspect, wherein the adjustment mechanism is a lens mechanism having a plurality of guide members that guide the adjustment.

[0013] A seventh aspect of the technology of this disclosure is a lens mechanism according to the sixth aspect, wherein the number of adjustment members and the number of guide members are each three.

[0014] An eighth aspect of the technology of this disclosure is a lens mechanism according to the seventh aspect, wherein the fixed member has a first guide axis and a second guide axis that guide the movement of the movable member, the second guide axis is arranged on the side opposite to the first guide axis with respect to the optical axis, and when the lens mechanism is divided into a first region and a second region by a line segment connecting the first guide axis and the second guide axis, the first region has one of the three adjustment members and two of the three guide members, the second region has two of the three adjustment members and one of the three guide members, and the sensor is a lens mechanism arranged in either the first region or the second region.

[0015] A ninth aspect of the technology of this disclosure is a lens mechanism according to the sixth aspect, wherein the sensor is a lens mechanism disposed between an adjustment member and a guide member.

[0016] A tenth aspect of the technology of this disclosure is a lens mechanism according to the ninth aspect, wherein the space is between an adjustment member and a guide member in the circumferential direction of the lens mechanism.

[0017] An eleventh aspect of the technology of this disclosure is a lens mechanism according to the sixth aspect, wherein the adjusting member and the guide member are arranged alternately in the circumferential direction of the lens mechanism.

[0018] A twelfth aspect of the technology of this disclosure is a lens mechanism according to the eighth aspect, wherein the second guide axis is inserted into a U-shaped groove of the moving member, and the sensor is positioned in a region closer to the second guide axis than to the first guide axis.

[0019] A thirteenth aspect of the technology of this disclosure is a lens mechanism according to the first aspect, wherein the movable member is connected to the outside of the lens holding member by an adjustment mechanism.

[0020] The 14th aspect according to the technology of the present disclosure is the lens mechanism according to the 1st aspect, wherein the lens is a lens mechanism disposed inside a tilt mechanism for tilting the lens mechanism and a shift mechanism for shifting the lens mechanism.

[0021] The 15th aspect according to the technology of the present disclosure is the lens mechanism according to the 1st aspect, wherein the adjustment mechanism is a lens mechanism disposed on the object side with respect to the lens.

[0022] The 16th aspect according to the technology of the present disclosure is the lens mechanism according to the 1st aspect, wherein the lens holding member has a connecting member disposed on the object side with respect to the lens, and the moving member is a lens mechanism connected to the outside of the connecting member.

[0023] The 17th aspect according to the technology of the present disclosure is the lens mechanism according to the 16th aspect, wherein the lens mechanism includes a focus lens as a lens and an objective lens disposed on the object side with respect to the focus lens, and at least a part of the objective lens is a lens mechanism disposed inside the connecting member.

[0024] The 18th aspect according to the technology of the present disclosure is the lens mechanism according to the 1st aspect, wherein the lens mechanism further includes a cam cylinder disposed outside the moving member and an operation member connected to the outside of the cam cylinder, the moving member is provided with a cam shaft, the cam cylinder has a cam groove engaged with the cam shaft, and the moving member is a lens mechanism that moves in the optical axis direction by the cam shaft moving along the cam groove in response to the rotation of the operation member and the cam cylinder.

[0025] The 19th aspect according to the technology of the present disclosure is the lens mechanism according to the 18th aspect, wherein the fixing member is provided between the moving member and the cam cylinder, and the moving member and the cam cylinder are lens mechanisms supported by the fixing member.

[0026] The 20th aspect according to the technology of the present disclosure is the lens mechanism according to the 18th aspect, wherein the cam cylinder and the fixing member are lens mechanisms having an opening formed at a position corresponding to the adjustment mechanism.

[0027] A 21st aspect of the technology of this disclosure is a lens device comprising a lens mechanism according to any one of the first to 20th aspects, a tilt mechanism for tilting the lens mechanism, a shift mechanism for shifting the lens mechanism, and a rotation mechanism for rotating at least one of the tilt mechanism and the shift mechanism around the optical axis. [Brief explanation of the drawing]

[0028] [Figure 1] This is a perspective view showing an example of an imaging device. [Figure 2] This is a plan view showing an example of a lens device. [Figure 3] This is a side view showing an example of a lens device. [Figure 4] This is a longitudinal cross-sectional view showing an example of a lens device. [Figure 5] This is a longitudinal cross-sectional view showing an example of a lens mechanism. [Figure 6] Figure 5 shows a cross-sectional view along the line F6-F6. [Figure 7] This is a perspective view including a partial cross-section of an example of a lens device. [Figure 8] This is a perspective view including a partial cross-section of an example of a lens device. [Figure 9] This is a cross-sectional view showing an example of the first and second regions in a lens mechanism. [Figure 10] This is an enlarged view of section A in Figure 9. [Figure 11] This is an enlarged view of section B in Figure 9. [Modes for carrying out the invention]

[0029] In this specification, “orthogonal” means not only perfect orthogonality but also orthogonality that includes errors generally accepted in the art to which the disclosed art belongs, provided that such errors do not contradict the spirit of the disclosed art. In this specification, “parallel” means not only perfect parallelism but also parallelism that includes errors generally accepted in the art to which the disclosed art belongs, provided that such errors do not contradict the spirit of the disclosed art. In this specification, “equally spaced” means not only perfectly equal spacing but also equal spacing that includes errors generally accepted in the art to which the disclosed art belongs, provided that such errors do not contradict the spirit of the disclosed art.

[0030] First, the configuration of the imaging device 10 according to one embodiment of this disclosure will be described.

[0031] Figure 1 shows an imaging device 10 according to this embodiment in a perspective view. As an example, as shown in Figure 1, the imaging device 10 comprises a lens device 12 and an imaging device body 14. The lens device 12 is located at the front of the imaging device body 14. In Figure 1, the lens device 12 and the imaging device body 14 are schematically shown. The imaging device body 14 incorporates an image sensor (not shown) and a computer (not shown), etc. With respect to the lens device 12, arrow A indicates the objective side, and arrow B indicates the imaging side. The optical axis OA is the optical axis of the lens device 12. Hereinafter, the axial direction of the optical axis OA will be referred to as the "optical axis direction".

[0032] Figure 2 shows the lens device 12 in a plan view, and Figure 3 shows the lens device 12 in a side view. Figure 4 shows the lens device 12 in a longitudinal cross-sectional view (i.e., a side cross-sectional view). As an example, as shown in Figures 2 to 4, the lens device 12 comprises a lens mechanism 16, a tilt mechanism 18, a shift mechanism 20, a revolving mechanism 22, and a mount 24.

[0033] The lens mechanism 16 has a focus ring 26. The focus ring 26 is formed in a ring shape around the optical axis. The focus ring 26 is capable of rotating around the optical axis.

[0034] The tilt mechanism 18 is a mechanism for tilting the lens mechanism 16. The tilt mechanism 18 includes a tilt base 28, a tilt stage 30, a tilt lock 32, and a tilt knob 34. The boundary 36 is the boundary between the tilt base 28 and the tilt stage 30. The boundary 36 is formed in an arc shape around a tilt axis (not shown) perpendicular to the optical axis OA. The tilt mechanism 18 operates starting from the boundary 36.

[0035] The tilt stage 30 is positioned closer to the objective lens than the tilt base 28. The tilt stage 30 is fixed to the lens mechanism 16. The tilt base 28 supports the tilt stage 30 so that it can tilt. Tilt refers to a rotational movement around a tilt axis. The tilt stage 30 tilts integrally with the lens mechanism 16.

[0036] The tilt lock 32 and the tilt knob 34 are axial members. The axial direction of the tilt lock 32 is positioned parallel to the axial direction of the tilt axis. Similarly, the axial direction of the tilt knob 34 is positioned parallel to the axial direction of the tilt axis. The tilt lock 32 and the tilt knob 34 are provided on the tilt base 28.

[0037] The tilt lock 32 is a component that can take on a locked state that fixes the tilt stage 30 to the tilt base 28 and an unlocked state that allows the tilt stage 30 to tilt. The tilt knob 34 is a component that tilts the tilt stage 30. Between the tilt knob 34 and the tilt stage 30, for example, a rack and pinion mechanism (not shown) is provided, and the tilt stage 30 tilts by an amount of movement corresponding to the amount of rotation of the tilt knob 34.

[0038] The revolving mechanism 22 is a mechanism that rotates the lens mechanism 16, the tilt mechanism 18, and the shift mechanism 20. The revolving mechanism 22 has a revolving stage 38 and a revolving base 40. The boundary 42 is the boundary between the revolving base 40 and the shift base 44, which will be described later. The boundary 42 is formed along a plane perpendicular to the optical axis OA. The revolving mechanism 22 operates starting from the boundary 42.

[0039] The revolving stage 38 is positioned on the imaging side of the tilt base 28. The revolving stage 38 is fixed to the tilt base 28. The revolving base 40 is positioned on the imaging side of the shift base 44. The revolving base 40 supports the shift base 44 so that it can rotate around the optical axis. The lens mechanism 16, tilt mechanism 18, revolving stage 38, and shift mechanism 20 rotate together around the optical axis. The lens mechanism 16, tilt mechanism 18, revolving stage 38, and shift mechanism 20 rotate when a force is applied in the rotational direction by a user or the like. The revolving mechanism 22 is an example of a "rotation mechanism" related to the technology of this disclosure.

[0040] The shift mechanism 20 is a mechanism for shifting the lens mechanism 16 and the tilt mechanism 18. The shift mechanism 20 includes a shift base 44, a shift stage 46, a shift lock 48, and a shift knob 50. The boundary 52 is the boundary between the shift base 44 and the shift stage 46. The boundary 52 is formed along a plane perpendicular to the optical axis OA. The shift mechanism 20 operates starting from the boundary 52.

[0041] The shift stage 46 is positioned on the imaging side of the revolving stage 38. The shift stage 46 is fixed to the revolving stage 38. The shift base 44 is positioned on the imaging side of the shift stage 46. The shift base 44 supports the shift stage 46 so that it can be shifted. Shifting refers to a sliding motion in a direction perpendicular to the optical axis. The shift stage 46 shifts together with the lens mechanism 16, the tilt mechanism 18, and the revolving stage 38. As an example, the direction in which the shift stage 46 shifts (hereinafter referred to as the "shift direction") is set in the vertical direction of the imaging device 10 (see Figure 1).

[0042] The shift lock 48 and the shift knob 50 are axial members. The axial direction of the shift lock 48 is arranged parallel to a direction perpendicular to the optical axis direction and the shift direction. Similarly, the axial direction of the shift knob 50 is arranged parallel to a direction perpendicular to the optical axis direction and the shift direction. The shift lock 48 and the shift knob 50 are provided on the shift stage 46.

[0043] The shift lock 48 is a component that can take on a locked state that fixes the shift stage 46 to the shift base 44 and an unlocked state that allows the shift stage 46 to shift. The shift knob 50 is a component that shifts the shift stage 46. Between the shift knob 50 and the shift base 44, for example, a rack and pinion mechanism (not shown) is provided, and the shift stage 46 shifts by an amount of movement corresponding to the amount of rotation of the shift knob 50.

[0044] The mount 24 is provided at the image-forming end of the lens mechanism 16. The mount 24 is fixed to the revolving base 40. The mount 24 is attached to a mount (not shown) provided on the imaging device body 14 (see Figure 1). By attaching the mount 24 to the mount provided on the imaging device body 14, the lens device 12 is fixed to the front of the imaging device body 14.

[0045] Figure 5 shows the lens mechanism 16 in a longitudinal cross-sectional view. As an example, as shown in Figure 5, the lens mechanism 16 includes a first lens 60, a second lens 62, a third lens 64, a first lens frame 66, a second lens frame 68, a third lens frame 70, a movable frame 72, a fixed member 74, a cam cylinder 76, a rotating cylinder 78, and a focus ring 26.

[0046] For example, the first lens 60 is the objective lens, and the second lens 62 is the focus lens. The first lens 60 is positioned closer to the objective lens than the second lens 62, and the third lens 64 is positioned closer to the imaging lens than the second lens 62. The first lens 60 is an example of an "objective lens" according to the technology of this disclosure. The second lens 62 is an example of a "lens" and "focusing lens" according to the technology of this disclosure.

[0047] The first lens 60 is positioned inside the first lens frame 66, the second lens 62 is positioned inside the second lens frame 68, and the third lens 64 is positioned inside the third lens frame 70. In this specification, “inside” means “radially inside” unless otherwise specified. The first lens frame 66 holds the first lens 60, the second lens frame 68 holds the second lens 62, and the third lens frame 70 holds the third lens 64. The second lens frame 68 is an example of a “lens holding member” relating to the art of this disclosure.

[0048] The first lens frame 66 has a first frame 80 and a second frame 82. The first frame 80 is located on the objective side of the second frame 82. Inside the first frame 80 is lens 60A, which is located on the objective side of the first lens 60, and inside the second frame 82 is lens 60B, which is located on the imaging side of the first lens 60.

[0049] The second lens frame 68 has a third frame 84 and a fourth frame 86. The third frame 84 is located on the objective side of the fourth frame 86. The second lens 62 is positioned inside the fourth frame 86. The second lens 62 and the fourth frame 86 are positioned inside the tilt mechanism 18, the shift mechanism 20, and the revolving mechanism 22 (see Figure 4).

[0050] The third frame 84 is positioned closer to the objective lens than the second lens 62. Furthermore, the third frame 84 is positioned outside the second frame 82 of the first lens frame 66. In this specification, "outside" means "radially outside" unless otherwise specified. The lens 60B located on the imaging side of the first lens 60 is positioned inside the third frame 84. The lens 60B located on the imaging side of the first lens 60 is an example of "at least a portion of the objective lens" according to the technology of this disclosure. The third frame 84 is an example of a "connecting member" according to the technology of this disclosure.

[0051] The movable frame 72 is connected to the outside of the third frame 84. The movable frame 72 is formed of, for example, resin. The fixed member 74 has a fixed frame 88 and a connecting frame 90. The fixed frame 88 is provided on the objective side of the connecting frame 90. The fixed frame 88 is located on the outside of the movable frame 72. The third lens frame 70 is fixed to the image-forming end of the connecting frame 90. The fourth frame 86 and the second lens 62 are located inside the connecting frame 90. The fixed member 74 is fixed to the first lens frame 66. The fixed frame 88 of the fixed member 74 is an example of a “fixed member” according to the technology of this disclosure. The movable frame 72 is an example of a “movable member” according to the technology of this disclosure.

[0052] The cam cylinder 76 is located outside the movable frame 72 and the fixed frame 88. The rotating cylinder 78 is connected to the outside of the cam cylinder 76, and the focus ring 26 is connected to the outside of the rotating cylinder 78. The cam cylinder 76 is an example of a "cam cylinder" according to the technology of this disclosure. The focus ring 26 is an example of an "operating ring" according to the technology of this disclosure.

[0053] The focus ring 26, the rotating cylinder 78, and the cam cylinder 76 are supported by the fixed member 74 so as to be rotatable around the optical axis. The movable frame 72 and the second lens frame 68 are also supported by the fixed member 74 so as to be movable in the optical axis direction.

[0054] A camshaft 92 is provided on the movable frame 72. The camshaft 92 is an axial member extending from the movable frame 72 toward the cam cylinder 76. A fixed frame 88 is provided between the movable frame 72 and the cam cylinder 76. The camshaft 92 passes through the fixed frame 88 and protrudes toward the cam cylinder 76 side relative to the fixed frame 88. A cam groove 94 is formed on the fixed frame 88 side surface of the cam cylinder 76 (i.e., the inner circumferential surface). The cam groove 94 is formed along a helix extending around the optical axis direction. The camshaft 92 is engaged with the cam groove 94.

[0055] The cam shaft 92 and cam groove 94 form a cam mechanism 96 that converts forces acting around the optical axis direction into forces in the optical axis direction. When the focus ring 26 is operated in the rotational direction by a user or the like, the cam shaft 92 moves along the cam groove 94 in accordance with the rotation of the focus ring 26 and the cam cylinder 76, causing the moving frame 72 and the second lens frame 68 to move in the optical axis direction. The cam shaft 92 is an example of a "cam shaft" in the technology of this disclosure. The cam groove 94 is an example of a "cam groove" in the technology of this disclosure.

[0056] Although Figure 5 shows one cam mechanism 96, the lens device 12 is provided with three cam mechanisms 96. In other words, there are three cam shafts 92 in total. The three cam shafts 92 are arranged at equal intervals around the optical axis. The cam grooves 94 of the three cam mechanisms 96 may be independent or connected.

[0057] Figure 6 shows the lens device 12 in a cross-sectional view along the line F6-F6 in Figure 5. Figures 7 and 8 also show the lens device 12 in a perspective view including a partial cross-section. Figure 8 is a perspective view taken from a different angle than Figure 7.

[0058] As an example, as shown in Figures 6 to 8, the lens mechanism 16 has a plurality of lens adjustment shafts 98, a plurality of tilt guides 100, and a sensor 102. The lens adjustment shafts 98 are members that adjust the angle of the second lens frame 68 with respect to the optical axis OA (i.e., the tilt angle), and the tilt guides 100 are members that guide the adjustment of the angle of the second lens frame 68. The specific configurations of the lens adjustment shafts 98 and tilt guides 100 will be described later. The sensor 102 is a sensor that detects the position of the movable frame 72 in the optical axis direction. As for the sensor 102, for example, a resistive displacement sensor using a resistive element, a GMR (Giant Magneto Resistive) sensor, etc. Examples include magnetic displacement sensors using a combination of a magnetized sheet, and linear sensors such as optical displacement sensors utilizing a diffraction grating and an optical pickup.

[0059] For example, there are three lens adjustment axes 98. Similarly, there are three tilt guides 100. The three lens adjustment axes 98 are arranged at equal intervals around the optical axis. Similarly, the three tilt guides 100 are also arranged at equal intervals around the optical axis. The lens adjustment axes 98 and tilt guides 100 are arranged alternately in the direction around the optical axis (i.e., the circumferential direction of the lens mechanism 16). Each tilt guide 100 is positioned between adjacent lens adjustment axes 98.

[0060] The three lens adjustment axes 98 and the three tilt guides 100 constitute the adjustment mechanism 104 of the second lens frame 68. The movable frame 72 is connected to the outside of the second lens frame 68 (specifically, the third frame 84) by the adjustment mechanism 104. The adjustment mechanism 104 is located on the objective side of the fourth frame 86 and the second lens 62 (see Figure 5). In addition, the multiple lens adjustment axes 98, the multiple tilt guides 100, and the sensor 102 are located inside the fixed frame 88.

[0061] The adjustment mechanism 104 is an example of a "lens holding member adjustment mechanism" related to the technology of this disclosure. The lens adjustment shaft 98 is an example of an "adjustment member" related to the technology of this disclosure. The tilt guide 100 is an example of a "guide member" related to the technology of this disclosure. The sensor 102 is an example of a technology of this disclosure. This is an example of a "sensor" related to this.

[0062] The lens mechanism 16 includes a first guide shaft 110, a first bearing 112, a second guide shaft 114, and a second bearing 116. The first guide shaft 110 and the second guide shaft 114 are pin-shaped and extend in the direction of the optical axis. The first guide shaft 110 and the second guide shaft 114 are mounted on a fixed frame 88. The second guide shaft 114 is positioned on the side opposite to the first guide shaft 110 across the optical axis OA (i.e., on the opposite side from the first guide shaft 110). The first guide shaft 110 and the second guide shaft 114 are formed of, for example, metal.

[0063] The first bearing 112 and the second bearing 116 are formed in the movable frame 72. That is, the movable frame 72 has the first bearing 112 and the second bearing 116. The first bearing 112 is formed in the shape of a hole extending in the direction of the optical axis. The second bearing 116 is formed in the shape of a U-shaped groove extending in the direction of the optical axis. The bottom of the U-shaped groove of the second bearing 116 is located on the optical axis OA side (i.e., radially inside the lens mechanism 16) of the second guide shaft 114, and the open part of the U-shaped groove of the second bearing 116 is located on the opposite side of the optical axis OA from the second guide shaft 114 (i.e., radially outside the lens mechanism 16).

[0064] A first guide shaft 110 is inserted into the first bearing 112, and a second guide shaft 114 is inserted into the second bearing 116. The insertion of the first guide shaft 110 into the first bearing 112 and the second guide shaft 114 into the second bearing 116 guides the movement of the movable frame 72 in the optical axis direction. The first guide shaft 110 is an example of a "guide shaft" and a "first guide shaft" in the technology of this disclosure. The second guide shaft 114 is an example of a "second guide shaft" in the technology of this disclosure. The first bearing 112 is an example of a "bearing" in the technology of this disclosure.

[0065] Figure 9 shows an embodiment in which the lens mechanism 16 is divided into a first region 120 and a second region 122. Figure 9 is a cross-sectional view of the lens mechanism 16 cut at the same position as in Figure 6. As an example, as shown in Figure 9, the first region 120 and the second region 122 are regions divided by a line segment 124 connecting the first guide axis 110 and the second guide axis 114. The first region 120 contains one of the three lens adjustment axes 98 and two of the three tilt guides 100. The second region 122 contains two of the three lens adjustment axes 98 and one of the three tilt guides 100.

[0066] As an example, sensor 102 is located in the first region 120. Sensor 102 is located between the lens adjustment axis 98 and the tilt guide 100 in the circumferential direction of the lens mechanism 16. Sensor 102 is located in a region closer to the second guide axis 114 than to the first guide axis 110.

[0067] Figure 10 shows an enlarged view of part A in Figure 9, and Figure 11 shows an enlarged view of part B in Figure 9. As an example, as shown in Figures 10 and 11, the movable frame 72 has openings 130 and 132 formed at positions corresponding to the adjustment mechanism 104. Opening 130 is formed at a position corresponding to the lens adjustment shaft 98, and opening 132 is formed at a position corresponding to the tilt guide 100. The fixed frame 88 has openings 134 and 136 formed at positions corresponding to the adjustment mechanism 104. Opening 134 is formed at a position corresponding to the lens adjustment shaft 98, and opening 136 is formed at a position corresponding to the tilt guide 100. The cam cylinder 76 has openings 138 and 140 formed at positions corresponding to the adjustment mechanism 104. Opening 138 is formed at a position corresponding to the lens adjustment shaft 98, and opening 140 is formed at a position corresponding to the tilt guide 100.

[0068] The lens adjustment shaft 98 has a support member 98A and a rotating member 98B. Support member 98A The second lens frame 68 is fixed to the third frame 84 of the second lens frame 68. The support member 98A is an axial member extending outward from the third frame 84. The rotating member 98B is rotatably supported by the support member 98A. The rotating member 98B has an eccentric shape with respect to the central axis of the support member 98A. The rotating member 98B is housed in an opening 130 formed in the movable frame 72 and is in contact with the inner circumferential surface of the opening 130. The angle of the second lens frame 68 is adjusted by changing the distance between the rotation center of the rotating member 98B and the inner circumferential surface of the opening 130 according to the rotation angle of the rotating member 98B.

[0069] The tilt guide 100 has a support member 100A and a guide member 100B. The support member 100A is fixed to the third frame 84 of the second lens frame 68. The support member 100A is an axial member that extends outward from the third frame 84. The guide member 100B is fixed to the support member 100A. The guide member 100B is housed in an opening 132 (i.e., a groove) formed in the movable frame 72. The guide member 100B is engaged with the opening 132 so as to be movable in the optical axis direction. The angle adjustment of the second lens frame 68 is guided by the guide member 100B being guided by the opening 132.

[0070] Next, the effects of this embodiment will be described.

[0071] The lens device 12 according to this embodiment includes a second lens frame 68 that holds a second lens 62, a movable frame 72 connected to the second lens frame 68, a fixed member 74 that supports the movable frame 72 so as to be movable in the optical axis direction, a sensor 102 that detects the position of the movable frame 72, and an adjustment mechanism 104 for the second lens frame 68. The sensor 102 and the adjustment mechanism 104 are arranged inside the fixed frame 88 of the fixed member 74. Therefore, the lens mechanism 16 can be made smaller compared to, for example, a structure in which the sensor 102 and the adjustment mechanism 104 are arranged outside the fixed frame 88.

[0072] In other words, if the sensor 102 and adjustment mechanism 104 are located outside the fixed frame 88, the sensor 102 and adjustment mechanism 104 will be stacked outwards from the fixed frame 88. On the other hand, as in the lens device 12 according to this embodiment, if the sensor 102 and adjustment mechanism 104 are located inside the fixed frame 88, it is possible to avoid stacking the sensor 102 and adjustment mechanism 104 outwards from the fixed frame 88. As a result, the lens mechanism 16 can be made smaller compared to a structure in which the sensor 102 and adjustment mechanism 104 are located outside the fixed frame 88.

[0073] Furthermore, the "inside of the fixed frame 88" mentioned above refers to the radially inward side of the fixed frame 88. Therefore, the lens mechanism 16 can be miniaturized in the radial direction.

[0074] Furthermore, the movable frame 72 is connected to the outside of the second lens frame 68. Therefore, compared to a structure in which the movable frame 72 and the second lens frame 68 are aligned in the axial direction of the lens mechanism 16, for example, the lens mechanism 16 can be made smaller in the axial direction.

[0075] Furthermore, the second lens frame 68 has a third frame 84 positioned closer to the objective lens than the second lens 62, and the movable frame 72 is connected to the outside of the third frame 84 of the second lens frame 68. For example, compared to a structure in which the movable frame 72 and the third frame 84 are aligned in the axial direction of the lens mechanism 16, the lens mechanism 16 can be made smaller in the axial direction.

[0076] Furthermore, the fixed frame 88 is positioned outside the movable frame 72. Therefore, compared to a structure in which the movable frame 72 and the fixed frame 88 are aligned in the axial direction of the lens mechanism 16, for example, the lens mechanism 16 can be made smaller in the axial direction.

[0077] Furthermore, the movable frame 72 is connected to the outside of the second lens frame 68 via the adjustment mechanism 104 of the second lens frame 68. Therefore, the angle of the second lens frame 68 relative to the movable frame 72 can be adjusted by the adjustment mechanism 104.

[0078] Furthermore, the adjustment mechanism 104 has multiple lens adjustment axes 98 for adjusting the angle of the second lens frame 68. Therefore, by adjusting the multiple lens adjustment axes 98, the angle of the second lens frame 68 can be adjusted at multiple locations. This increases the degree of freedom in adjusting the angle of the second lens frame 68 compared to a structure in which the angle of the second lens frame 68 can only be adjusted at one location.

[0079] Furthermore, the adjustment mechanism 104 has a plurality of tilt guides 100 that guide the adjustment of the angle of the second lens frame 68. Therefore, the adjustment of the angle of the second lens frame 68 can be guided at multiple points. This makes it possible to suppress play in the second lens frame 68 when adjusting its angle, compared to, for example, a structure in which the adjustment of the angle of the second lens frame 68 is guided at only one point.

[0080] Furthermore, there are three lens adjustment axes 98. Therefore, the angle of the second lens frame 68 can be adjusted at three locations. Also, there are three tilt guides 100. Therefore, the angle of the second lens frame 68 can be guided at three locations.

[0081] Furthermore, the fixed frame 88 has a first guide axis 110 and a second guide axis 114 that guide the movement of the movable frame 72. The second guide axis 114 is positioned on the side opposite to the first guide axis 110, with the optical axis OA in between. When the lens mechanism 16 is divided into a first region 120 and a second region 122 by a line segment 124 connecting the first guide axis 110 and the second guide axis 114, the first region 120 contains one of the three lens adjustment axes 98 and two of the three tilt guides 100. The second region 122 contains two of the three lens adjustment axes 98 and one of the three tilt guides 100. In addition, the sensor 102 is located in the first region 120.

[0082] Therefore, since the three lens adjustment axes 98, the three tilt guides 100, and the sensor 102 are distributed between the first region 120 and the second region 122, the lens mechanism 16 can be miniaturized compared to, for example, the case where the three lens adjustment axes 98, the three tilt guides 100, and the sensor 102 are unevenly distributed in either the first region 120 or the second region 122.

[0083] Furthermore, the sensor 102 is positioned between the lens adjustment shaft 98 and the tilt guide 100. Therefore, the space between the lens adjustment shaft 98 and the tilt guide 100 can be effectively utilized as space for positioning the sensor 102.

[0084] Furthermore, the space between the lens adjustment shaft 98 and the tilt guide 100 mentioned above refers to the space between the lens adjustment shaft 98 and the tilt guide 100 in the circumferential direction of the lens mechanism 16. Therefore, the space between the lens adjustment shaft 98 and the tilt guide 100 in the circumferential direction of the lens mechanism 16 can be effectively utilized as space for arranging the sensor 102.

[0085] Furthermore, the lens adjustment shafts 98 and tilt guides 100 are arranged alternately in the circumferential direction of the lens mechanism 16. Therefore, compared to a structure in which the lens adjustment shafts 98 are arranged adjacent to each other in the circumferential direction of the lens mechanism 16, and / or a structure in which the tilt guides 100 are arranged adjacent to each other in the circumferential direction of the lens mechanism 16, the angle of the second lens frame 68 when adjusting the angle of the second lens frame 68 is The looseness is suppressed by each tilt guide 100, while adjustments can be made smoothly by the lens adjustment shaft 98.

[0086] Furthermore, the sensor 102 is positioned in a region closer to the second guide axis 114 than to the first guide axis 110. Here, the first bearing 112 is formed in the shape of a hole, and the second bearing 116 is formed in the shape of a U-shaped groove. Therefore, the radial restraining force of the lens mechanism 16 is weaker in the second bearing 116 than in the first bearing 112, so the position change when the focus ring 26 is operated is greater in the peripheral region of the second bearing 116 than in the peripheral region of the first bearing 112. Thus, by positioning the sensor 102 in a region closer to the second guide axis 114 than to the first guide axis 110, the position of the movable frame 72 when the focus ring 26 is operated can be accurately detected.

[0087] Furthermore, the second lens 62, held in the fourth frame 86 of the second lens frame 68, is positioned inside the tilt mechanism 18 that tilts the lens mechanism 16 and the shift mechanism 20 that shifts the lens mechanism 16. Here, the fixed frame 88 is positioned closer to the objective lens than the second lens 62 and the fourth frame 86, and the sensor 102 and adjustment mechanism 104 are positioned inside the fixed frame 88. Therefore, compared to a structure in which the sensor 102 and adjustment mechanism 104 are positioned between the fourth frame 86 and the tilt mechanism 18 and / or between the fourth frame 86 and the shift mechanism 20, for example, the lens device 12 can be made smaller in the radial direction.

[0088] Furthermore, the adjustment mechanism 104 is located on the objective side of the second lens 62. Therefore, compared to a structure where, for example, the adjustment mechanism 104 is located outside the second lens 62, the lens device 12 can be made smaller in the radial direction.

[0089] Furthermore, the lens mechanism 16 includes a first lens 60 and a second lens 62, and the lens 60B of the first lens 60, which is located on the image-forming side, is positioned inside the third frame 84. Therefore, compared to a structure in which, for example, the lens 60B and the third frame 84 are aligned in the axial direction of the lens mechanism 16, the lens mechanism 16 can be made smaller in the axial direction.

[0090] Furthermore, the lens mechanism 16 includes a cam cylinder 76 positioned outside the movable frame 72 and a focus ring 26 connected to the outside of the cam cylinder 76. The movable frame 72 is provided with a cam shaft 92, and the cam cylinder 76 has a cam groove 94 that engages with the cam shaft 92. Therefore, when the focus ring 26 is operated in the rotational direction by a user or the like, the cam shaft 92 moves along the cam groove 94 in accordance with the rotation of the focus ring 26 and the cam cylinder 76, thereby moving the movable frame 72 and the second lens frame 68 in the optical axis direction. This allows a user or the like to manually focus on the subject.

[0091] Furthermore, the fixed frame 88 is provided between the movable frame 72 and the cam cylinder 76, and supports both the movable frame 72 and the cam cylinder 76. Therefore, since the movable frame 72 and the cam cylinder 76 are supported by a common fixed frame 88, the lens mechanism 16 can be made smaller compared to, for example, a case where a first support frame supporting the movable frame 72 and a second support frame supporting the cam cylinder 76 are provided separately.

[0092] Furthermore, the movable frame 72 has openings 130 and 132 formed at positions corresponding to the adjustment mechanism 104. Opening 130 is formed at a position corresponding to the lens adjustment shaft 98, and opening 132 is formed at a position corresponding to the tilt guide 100. The fixed frame 88 has openings 134 and 136 formed at positions corresponding to the adjustment mechanism 104. Opening 134 is formed at a position corresponding to the lens adjustment shaft 98, and opening 136 is formed at a position corresponding to the tilt guide 100. The cam cylinder 76 has openings 138 and 140 formed at positions corresponding to the adjustment mechanism 104. Opening 138 corresponds to the lens adjustment shaft 98. The openings are formed in a position corresponding to the tilt guide 100. Therefore, the lens adjustment shaft 98 can be adjusted through the openings 130, 134, and 138. In addition, maintenance of the tilt guide 100 can be performed through the openings 132, 136, and 140.

[0093] Furthermore, the lens device 12 includes a lens mechanism 16, a tilt mechanism 18 for tilting the lens mechanism 16, and a shift mechanism 20 for shifting the lens mechanism 16. Therefore, tilt imaging, in which imaging is performed with the lens mechanism 16 tilted by the tilt mechanism 18, and shift imaging, in which imaging is performed with the shift mechanism 20 shifted by the shift mechanism 20, can be performed.

[0094] Furthermore, the lens device 12 includes a revolving mechanism 22 that rotates the tilt mechanism 18 and the shift mechanism 20 around the optical axis. Therefore, by rotating the tilt mechanism 18 with the revolving mechanism 22, the direction in which the lens mechanism 16 is tilted can be changed. Also, by rotating the shift mechanism 20 with the revolving mechanism 22, the direction in which the lens mechanism 16 is shifted can be changed.

[0095] Next, a modified example of this embodiment will be described.

[0096] In the above embodiment, the number of camshafts 92 is three, but it may be other than three.

[0097] Furthermore, in the above embodiment, the number of lens adjustment axes 98 is three, but it may be other than three.

[0098] Furthermore, in the above embodiment, the number of tailgate guides 100 is three, but it may be other than three.

[0099] Furthermore, in the above embodiment, the lens 60B located on the imaging side of the first lens 60 is arranged inside the third frame 84, but the lens 60A located on the objective side of the first lens 60 may also be arranged inside the third frame 84.

[0100] Furthermore, in the above embodiment, the sensor 102 is located in the first region 120, but it may also be located in the second region 122.

[0101] Furthermore, in the above embodiment, the lens mechanism 16 has a first guide shaft 110 and a second guide shaft 114 that guide the movable frame 72, but the number of guide shafts that guide the movable frame 72 may be one or three or more.

[0102] Furthermore, in the above embodiment, the revolving mechanism 22 is a mechanism that rotates the tilt mechanism 18 and the shift mechanism 20 around the optical axis direction, but it may also be a mechanism that rotates either the tilt mechanism 18 or the shift mechanism 20 around the optical axis direction.

[0103] Furthermore, in the above embodiment, the lens device 12 has a tilt mechanism 18, a shift mechanism 20, and a revolving mechanism 22, but at least one of the tilt mechanism 18, the shift mechanism 20, and the revolving mechanism 22 may be omitted.

[0104] The descriptions and illustrations shown above are detailed explanations of the parts relating to the technology of this disclosure, and are merely examples of the technology of this disclosure. For example, the above explanation of the structure, function, operation, and effect is an example of the structure, function, operation, and effect of the parts relating to the technology of this disclosure. It is clear. Therefore, it goes without saying that you may delete unnecessary parts, add new elements, or replace elements in the above-mentioned descriptions and illustrations, as long as you do not deviate from the spirit of the technology of this disclosure. Furthermore, in order to avoid confusion and to facilitate understanding of the parts relating to the technology of this disclosure, explanations of common technical knowledge and the like that do not require special explanation to enable the implementation of the technology of this disclosure have been omitted from the above-mentioned descriptions and illustrations.

[0105] In this specification, "A and / or B" is synonymous with "at least one of A and B." That is, "A and / or B" means that it may be A alone, or B alone, or a combination of A and B. Furthermore, in this specification, the same concept as "A and / or B" applies when expressing three or more things linked by "and / or."

[0106] All documents, patent applications, and technical standards described herein are incorporated by reference to the same extent as if each individual document, patent application, and technical standard were specifically and individually noted to be incorporated by reference. [Explanation of Symbols]

[0107] 10 Imaging device 12 Lens device 14. Imaging device body 16 Lens mechanism 18 Tilt mechanism 20 Shift mechanism 22 Revolving Mechanism 24 Mount 26 Focus Ring 28 Tilt Base 30 Tilt Stage 32 Tilt Lock 34 Tilt knob 36 Boundary 38 Revolving Stages 40 Revolving Bass 42 Boundary 44 Shift base 46 Shift Stages 48 Shift Lock 50 Shift knob 52 Boundary 60 First Lens 62 Second Lens 64 Third Lens 66 First lens frame 68 Second lens frame 70 Third lens frame 72 Movement slots 74 Fixing member 76 Cam cylinder 78 Rotating Cylinder 80, Slot 1 82. Second slot 84. Third Slot 86, 4th slot 88 Fixed Frames 90 Connecting frame 92 Camshaft 94 cam groove 96 Cam mechanism 98 Lens adjustment axis 98A Support Member 98B Rotating Member 100 Guides to Dragging 100A Support Member 100B Guide Member 102 Sensors 104 Adjustment mechanism 110 First guide axis 112 First bearing 114 Second guide axis 116 Second bearing 120 1st area 122 Second area 124 line segments 130 Aperture 132 Aperture 134 Aperture 136 Aperture 138 Aperture 140 Aperture

Claims

1. A lens holding member that holds the lens, A movable member connected to the lens holding member, A fixing member that supports the aforementioned movable member so that it can move in the optical axis direction, A sensor for detecting the position of the moving member, The adjustment mechanism for the lens holding member, Equipped with, The sensor and the adjustment mechanism are located inside the fixing member. The adjustment mechanism has a plurality of adjustment members for adjusting the angle of the lens holding member, Each of the aforementioned adjustment members is positioned on a plane perpendicular to the optical axis. Lens mechanism.

2. The aforementioned inner side is the radially inner side of the fixing member. The lens mechanism according to claim 1.

3. The moving member is connected to the radially outer side of the lens holding member. The lens mechanism according to claim 1.

4. The fixing member is positioned radially outward of the moving member. The lens mechanism according to claim 1.

5. The adjustment mechanism has a plurality of guide members that guide the adjustment. The lens mechanism according to claim 1.

6. The number of the multiple adjustment members and the number of the multiple guide members are each three. The lens mechanism according to claim 5.

7. The fixing member has a first guide shaft and a second guide shaft that guide the movement of the moving member. The second guide axis is positioned on the side opposite to the first guide axis, with the optical axis in between. When the lens mechanism is divided into a first region and a second region by a line segment connecting the first guide axis and the second guide axis, In the first region, one of the three adjustment members and two of the three guide members are arranged. In the second region, two of the three adjustment members and one of the three guide members are arranged. The sensor is located in either the first region or the second region. The lens mechanism according to claim 6.

8. The sensor is positioned between the adjustment member and the guide member. The lens mechanism according to claim 5.

9. The aforementioned space is the space between the adjustment member and the guide member in the circumferential direction of the lens mechanism. The lens mechanism according to claim 8.

10. The adjustment member and the guide member are arranged alternately in the circumferential direction of the lens mechanism. The lens mechanism according to claim 5.

11. The second guide shaft is inserted into the U-shaped groove of the moving member. The sensor is positioned in a region closer to the second guide axis than to the first guide axis. The lens mechanism according to claim 7.

12. The moving member is connected to the outside of the lens holding member by the adjustment mechanism. The lens mechanism according to claim 1.

13. The lens is positioned inside the tilt mechanism that tilts the lens mechanism and the shift mechanism that shifts the lens mechanism. The lens mechanism according to claim 1.

14. The adjustment mechanism is positioned on the objective side of the lens. The lens mechanism according to claim 1.

15. The lens holding member has a connecting member positioned on the objective side of the lens, The movable member is connected to the outside of the connecting member. The lens mechanism according to claim 1.

16. The aforementioned lens mechanism is The aforementioned lens is a focusing lens, An objective lens positioned on the objective side of the aforementioned focusing lens, Equipped with, At least a portion of the objective lens is positioned inside the connecting member. The lens mechanism according to claim 15.

17. The aforementioned lens mechanism is A cam cylinder positioned on the outside of the aforementioned moving member, An operating member connected to the outside of the cam cylinder, Furthermore, The moving member is provided with a camshaft. The cam cylinder has a cam groove that engages with the cam shaft, The moving member moves in the optical axis direction as the cam shaft moves along the cam groove in response to the rotation of the operating member and the cam cylinder. The lens mechanism according to claim 1.

18. The fixing member is provided between the moving member and the cam cylinder, The movable member and the cam cylinder are supported by the fixed member. The lens mechanism according to claim 17.

19. The cam cylinder and the fixing member have openings formed at positions corresponding to the adjustment mechanism. The lens mechanism according to claim 17.

20. A lens mechanism according to any one of claims 1 to 19, A tilt mechanism for tilting the aforementioned lens mechanism, A shift mechanism for shifting the aforementioned lens mechanism, A rotation mechanism that rotates at least one of the tilt mechanism and the shift mechanism around the optical axis, A lens device equipped with the following features.

21. The lens device according to claim 20, Image sensor and An imaging device equipped with the following features.

Images