WO2011111345A1 - レンズ鏡筒 - Google Patents
レンズ鏡筒 Download PDFInfo
- Publication number
- WO2011111345A1 WO2011111345A1 PCT/JP2011/001257 JP2011001257W WO2011111345A1 WO 2011111345 A1 WO2011111345 A1 WO 2011111345A1 JP 2011001257 W JP2011001257 W JP 2011001257W WO 2011111345 A1 WO2011111345 A1 WO 2011111345A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fpc
- lens barrel
- fixed cylinder
- positioning
- camera body
- Prior art date
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
Definitions
- the present invention relates to a lens barrel in which an internal electrical component is electrically connected to a camera body through a flexible printed board.
- lens barrels are required to be downsized in addition to high performance and high functionality.
- the lens and the driving unit for driving the lens are inevitably increased, and the lens barrel is increased in size, which contradicts the demand for size reduction.
- the lens barrel is reduced in size, the clearance between the parts is reduced, so that the difficulty in assembling the lens barrel is increased.
- a lens barrel generally includes electrical components, and the electrical components and a circuit board on the camera body side are generally electrically connected via a flexible printed circuit board (hereinafter referred to as “FPC”).
- FPC flexible printed circuit board
- the space for disposing the FPC is limited. Therefore, if the FPC is not properly disposed, the FPC may interfere with the driving member when the camera is used, and the FPC may be damaged. There is. In addition, if the FPC is not properly arranged, the FPC may be damaged, for example, the FPC may be cut when the lens barrel is assembled, resulting in malfunction of the lens barrel.
- an inner focus configuration a configuration in which a motor is provided in the lens, and a camera shake correction mechanism are often mounted.
- the movable member is disposed on the image plane side, and accordingly, the electrical component is disposed on the object side, and the distance of the FPC for electrical connection with the camera body side. Becomes longer.
- the FPC needs to have a sufficient length because the FPC needs to be pulled out of the lens barrel. In order to store such a long FPC in the lens barrel and avoid interference with the movable member, the arrangement of the FPC is important. That is, there is a need for an FPC arrangement that saves space and is easy to assemble.
- Patent Document 1 As shown in FIG. 6, an attachment ground plate 3000 provided facing the side wall of the fixed cylinder 2000 and having the electronic component group 1000 attached to the fixed cylinder 2000 side, and a side wall of the fixed cylinder 2000 A lens barrel in which the FPC is folded twice and stored in the space between the two is disclosed.
- Patent Document 2 as shown in FIG. 7, a lens in which a support plate 5400 that is relatively slidable in the optical axis direction and an electric member 4200 a provided on the lower side of the support plate 5400 are connected by an FPC 6500.
- a lens barrel is disclosed.
- one end of FPC6500 is attached to the upper surface of the support plate 5400, turned once downward and is opposed to the lower surface of the support plate 5400, and then in a direction orthogonal to the support plate 5400. It is bent and the other end is connected to the electric member 4200a.
- the FPC is merely folded twice and stored, and no measures are taken to prevent contact between the FPC and the electronic component group 1000. Therefore, there is a possibility that the FPC may be damaged by the electronic component or the solder for connecting the electronic component, and malfunction may occur due to noise on the electric signal.
- the FPC 6500 is attached to the upper surface of the support plate 5400 and is folded once downward. Therefore, a force in the direction of peeling from the support plate 5400 is applied to the FPC 6500, and the sticking part peels off when used for a long period of time, interferes with an adjacent member during operation, and causes abnormal noise and poor conduction.
- the object of the present invention is to prevent contact between the FPC and the peripheral members of the FPC even if the length of the FPC is ensured in order to facilitate assembly, and prevent the FPC from peeling off at the affixing portion.
- a lens barrel capable of stably mounting an FPC is provided.
- a lens barrel according to one aspect of the present invention is a lens barrel in which an internal electrical component is electrically connected to a circuit board of a camera body, and is held by the fixed barrel and the lens group.
- a cylindrical movable member that moves in the optical axis direction, an FPC that has an upstream end connected to the electrical component, and a downstream end that is connected to the camera body, and a radial distance from the movable member,
- An FPC fixing member that fixes the FPC, the fixed cylinder includes a positioning portion that passes and positions the FPC, and the FPC is positioned at a predetermined position on the downstream end side with respect to the upstream end.
- the first bending part bent from the pasting part so that the outer periphery is directed to the upstream end side and faces the pasting part, and the first curving part Also the downstream end In the predetermined position, bent in a direction intersecting with the sticking portion, and a second curved portion is guided to the positioning portion, the FPC is pressed against the object side in the positioning unit.
- Embodiment 1 shows a partial cross-sectional view in the optical axis direction of a lens barrel according to Embodiment 1 of the present invention. It is a figure explaining the relationship between a positioning part and FPC. It is an expanded view of FPC. It is sectional drawing which showed a part of cross section of the optical axis direction of the lens barrel in Embodiment 2 of this invention. It is the figure which showed the modification of FIG. It is a partial cross section figure of the optical axis direction of the lens barrel of a prior art. It is a partial cross section figure of the optical axis direction of the lens barrel of a prior art.
- FIG. 1 shows a partial cross-sectional view in the optical axis direction of a lens barrel according to Embodiment 1 of the present invention.
- the z direction indicates the optical axis direction
- the y direction indicates the radial direction
- the x direction indicates the width direction.
- the + z direction side is described as the object side
- the ⁇ z direction side as the camera body side
- the + y direction side as the outer diameter side
- the ⁇ y direction as the inner diameter side.
- the lens barrel is a cylindrical fixed tube 1 whose longitudinal direction faces the optical axis direction, a cylindrical movable tube that is provided coaxially with the fixed tube 1 and abuts against the side wall 1 a of the fixed tube 1.
- a member 2 an electrical component 5 provided on the + z direction side in the fixed cylinder 1, and a cylindrical FPC fixing member 4 provided coaxially with the fixed cylinder 1 and covering the outer periphery of the movable member 2 are provided.
- the side wall 1a of the fixed cylinder 1 is provided with a guide pin 12 protruding in the + y direction.
- a plurality of guide pins 12 (hereinafter referred to as three) are provided at locations where the outer periphery of the side wall 1a of the fixed cylinder 1 is divided into a plurality of equal parts (hereinafter referred to as three equal parts) as viewed in the z direction.
- the guide pin 12 is screwed to the fixed cylinder 1.
- the movable member 2 is attached to the fixed cylinder 1 so as to be rotatable about the central axis Z1.
- the surface on the ⁇ y direction side of the side wall 2 a of the movable member 2 is in contact with the surface on the + y direction side of the side wall 1 a of the fixed cylinder 1.
- three long holes 21 for guiding the three guide pins 12 are provided in the side wall 2a of the movable member 2.
- the long hole 21 has a longitudinal direction facing a direction parallel to the xy plane. Thereby, the movement of the movable member 2 in the z direction is restricted.
- the longitudinal direction of the long hole 21 may be slightly inclined with respect to the xy plane.
- a long hole 22 for moving the guide pin 13 in the z direction is formed in the side wall 2a of the movable member 2.
- the long hole 22 is a cam groove, and is a long hole in an oblique direction extending in the rotation direction (x direction) and changing its position in the z direction.
- a plurality of the long holes 22 (hereinafter referred to as three) are provided at locations where the side wall 2a of the movable member 2 is divided into a plurality of equal parts (hereinafter referred to as three equal parts) as viewed in the z direction.
- the rear end of the fixed cylinder 1 is provided with a long hole 15 that penetrates the long hole 22 with the z direction that restricts the movement of the guide pin 13 in the circumferential direction as the long direction.
- the guide pin 13 is engaged with the long hole 22 and the long hole 15, and the front end portion 15 a in the ⁇ y direction is engaged with the holding frame 14.
- Three guide pins 13 are provided corresponding to the long holes 15 and 22. There may be a plurality of sets of guide pins 12 and 13 and long holes 15 and 22.
- the holding frame 14 holds the movable lens group L3. Therefore, when the movable member 2 is rotated with respect to the fixed cylinder 1 about the central axis Z1, the guide pin 13 is moved in the z direction by the long hole 22, and the holding frame 14 is moved in the z direction along with the movement. With this movement, the movable lens unit L3 moves in the z direction. That is, in the present embodiment, the movable member 2 rotates to move the movable lens group L3 in the z direction.
- the lens groups L1 and L2 are fixed lens groups that do not move.
- the FPC fixing member 4 is attached to the fixed cylinder 1 such that the side wall 4a is separated from the side wall 2a of the fixed cylinder 1 in the + y direction. Therefore, an FPC space 8 is formed between the side wall 2 a of the movable member 2 and the side wall 4 a of the FPC fixing member 4.
- the FPC fixing member 4 is attached by using the fixing cylinder 1 and an engaging member (not shown) such as a screw, and is an exterior member of the lens barrel.
- the engaging member attaches the FPC fixing member 4 to the fixed cylinder 1 at the rear end portion 16 of the fixed cylinder 1 in the xy section when the lens barrel is sliced in a direction different from that in FIG.
- a plurality of (for example, three) engaging members are provided at locations where the outer periphery of the fixed cylinder 1 is divided into, for example, a plurality of equal parts when viewed in the z direction.
- an electrical component 5 is attached to the + z direction side of the movable member 2.
- the electrical component 5 includes a flat substrate 51 attached to the + y direction side of the side wall 1 a of the fixed cylinder 1.
- a connector C1 attached to the upstream end 3F of the FPC 3 is connected to the substrate 51.
- the electrical component 5 has, for example, a function for performing autofocus control.
- the FPC 3 has a connector C1 connected to the upstream end 3F and a connector C2 connected to the downstream end 3B.
- the connector C2 is an electrical contact with the camera body side.
- the side to which the connector C1 is connected is described as the upstream end side of the FPC 3
- the side to which the connector C2 is connected is described as the downstream end side of the FPC 3.
- the fixed cylinder 1 is provided with a positioning portion 11 for passing the FPC 3 through the rear end portion 16 and positioning the FPC 3.
- the positioning portion 11 is configured by a groove formed by cutting out the rear end portion 16 of the fixed cylinder 1 in a concave shape in the + z direction side when viewed in the y direction.
- a ring-shaped mount 9 for attaching to the camera body is attached to the rear end portion 16 of the fixed cylinder 1.
- a connector C2 is fixed to the mount 9.
- the mount 9 is coaxial with the fixed cylinder 1 and is fixed to the fixed cylinder 1 with screws.
- the FPC fixing member 4 is fixed to the fixed cylinder 1 with screws.
- the FPC 3 includes a pasting portion 36 that is pasted to the FPC fixing member 4 on the downstream end 3B side from the connector C1.
- the affixing portion 36 has a rear end 361 positioned at the boundary between the side wall 4a and the bottom wall 4b of the FPC fixing member 4, and a surface on the + y direction side is a surface (inner side) of the side wall 4a of the FPC fixing member 4 Affixed to the wall).
- the FPC 3 includes a first curved portion 31 that is bent from the sticking portion 36 so that the outer periphery faces the + z direction and faces the sticking portion 36.
- the first bending portion 31 has a length 31 y in the y direction that is shorter than the length 8 y in the y direction of the FPC space 8, and is set to a length at which the FPC 3 does not contact the movable member 2.
- the FPC 3 is located at a predetermined position on the ⁇ z direction side (downstream end 3B side) with respect to the first bending portion 31 in the lens barrel inner (center axis Z1) direction (eg, orthogonal direction: ⁇ y). Direction) and a second bending portion 32 guided to the positioning portion 11 is provided.
- the FPC 3 includes a third bending portion 33 that is bent toward the ⁇ z direction side at a predetermined position on the downstream end 3B side with respect to the positioning portion 11.
- FIG. 2A and 2B are diagrams for explaining the relationship between the positioning unit 11 and the FPC 3.
- FIG. 2A shows the FPC 3 viewed from the rear end side of the lens barrel (viewed in the + z direction), and FIG. FPC3 is shown.
- the FPC 3 includes a pair of left and right protrusions 3x and 3x protruding in the x direction.
- the FPC 3 has a reinforcing member 30 attached to an area in the positioning portion 11 and serves as a reinforcing area that reinforces the FPC 3.
- the shape of the reinforcing member 30 is substantially the same as the shape of the FPC 3 in the positioning portion 11.
- a polyimide sheet that is the same material as the FPC 3 may be employed, but the present invention is not limited thereto, and a plastic sheet may be employed.
- the positioning part 11 is provided with a concave part 112, 112 provided in a pair of left and right in the x direction in which the convex parts 3x, 3x are fitted.
- a pair of sides parallel to the x direction is the first restricting portions 113,113. Further, the recess 112 has a second restricting portion 114 on a side parallel to the y direction. The movement of the FPC 3 in the y direction is restricted by the first restricting portions 113 and 113, and the movement in the x direction is restricted by the second restricting portion 114.
- the width dimension of the positioning part 11 on the + y direction side and the ⁇ y direction side with respect to the recesses 112 and 112 is longer than the width dimension of the FPC 3.
- the connector 7 is provided in the center of the reinforcing area where the reinforcing member 30 is attached.
- the FPC 3 is divided into an upstream FPC 301 on the upstream end 3F side from the reinforcement region and a downstream FPC 302 on the downstream end 3B side from the reinforcement region.
- the female portion of the connector 7 is provided to protrude in the ⁇ z direction at a position slightly upstream from the downstream end 301E of the upstream FPC 301 at the upstream end 3F side.
- the male part of the connector 7 is provided at the upstream end 302F of the downstream FPC 302. And the upstream FPC301 and the downstream FPC302 are electrically connected by the male part and female part of the connector 7 fitting.
- the FPC 3 includes a third bending portion 33. Therefore, the FPC 3 generates an elastic force F toward the object side in the positioning unit 11. By this elastic force F, the FPC 3 is pressed against the bottom surface 111 of the positioning portion 11 on the + z direction side and is stably attached to the fixed cylinder 1. Even if the convex portions 3x and 3x are not provided on the FPC 3, the FPC 3 is pressed against the object-side bottom surface 111 of the positioning portion 11 by the elastic force F. Therefore, the FPC 3 can be stably attached to the fixed cylinder 1.
- the third bending portion 33 when the third bending portion 33 is not provided in the FPC 3, the FPC 3 is subjected to a force on the ⁇ z direction side in the positioning portion 11 due to the presence of the second bending portion 32 or the like, and the bottom surface 111 of the positioning portion 11. Will float from. If it does so, it will become impossible to attach FPC3 to the fixed cylinder 1 stably. Therefore, by providing the third bending portion 33, it is possible to apply the elastic force F to the FPC 3 and to attach the FPC 3 to the fixed cylinder 1 stably.
- the third bending portion 33 is configured by bending the FPC 3 once.
- the third bending portion 33 is not limited to this, and may be configured by bending one or more times after bending the FPC 3 once. . What is necessary is just to set the frequency
- FIG. 5 is a diagram illustrating the relationship between the positioning unit 11 and the FPC 3, and is a diagram of the positioning unit 11 viewed from the + z direction.
- the two sides parallel to the y direction of the convex portion 3x are the second restricting portions 114 and 114, but in FIG. 5 the + y direction side and the ⁇ y direction side of the convex portions 3x and 3x.
- Two sides formed in parallel to the y direction are defined as second restricting portions 114 ′ and 114 ′.
- the width dimension between 2nd control part 114 ', 114' is made the same as the width dimension of FPC3. This restricts the movement of the FPC 3 in the x direction.
- the width dimension between the convex parts 3x and 3x is made shorter than the width dimension between the 2nd control parts 114 and 114.
- FIG. 3 is a development view of the FPC 3.
- the FPC 3 has a substantially U shape in which the developed shape includes a bottom portion 311, a first branch portion 312, and a second branch portion 313.
- the first branch portion 312 extends from one end of the bottom portion 311, and the longitudinal direction is orthogonal to the longitudinal direction of the bottom portion 311.
- the second branch portion 313 extends from the other end of the bottom portion 311, and the longitudinal direction is orthogonal to the longitudinal direction of the bottom portion 311.
- the outer periphery 311 a of the bottom 311 is a straight line parallel to the longitudinal direction of the bottom 311.
- the outer periphery 311a is positioned at the rear end 361 of the pasting portion 36.
- the outer periphery 311a of the bottom portion 311 is positioned at the end of the FPC fixing member 4 on the ⁇ z direction side, that is, the boundary between the side wall 4a of the FPC fixing member 4 and the bottom wall 4b (rear end portion 361). And affixed to the FPC fixing member 4. Therefore, when the length 36z of the affixing portion 36 in the z direction is made constant, the start position of the first bending portion 31 can be set to a desired position in the z direction in the FPC space 8, and the FPC 3 can be accurately set. It can be attached to the fixed cylinder 1 well.
- the second branch portion 313 is allowed to enter the positioning portion 11 and the convex portion 3x is fitted into the concave portion 112. Since the 1st bending part 31 and the 2nd bending part 32 are formed in the desired position of this, the attachment operation
- the length 36z for example, a length about the width in the z direction of the bottom 311 can be employed.
- the entire area of the bottom 311 is the pasting portion 36 shown in FIG.
- a region of the first branch portion 312 having a length of 312 z from the outer periphery 311 a may be included in the pasting portion 36.
- the FPC 3 includes a fourth curved portion 34 that is bent (turned back) at a predetermined position in the vicinity of the electrical component 5 on the upstream end side of the pasting region of the first branch portion 312.
- the number of turns of the fourth bending portion 34 is set to two.
- the number is not limited to this, and the number of turns is 1 according to the length of the FPC 3 on the upstream end side of the pasting region of the first branch portion 312. What is necessary is just to set suitably to the frequency
- the upstream FPC 301 (the bottom 311 of the FPC 301) is attached to the attaching portion 36 of the FPC fixing member 4.
- the connector C1 of the FPC 3 is connected to the substrate 51.
- the internal unit is inserted into the FPC fixing member 4, and the FPC fixing member 4 is attached to the rear end portion 16 of the fixed cylinder 1.
- the downstream end 301 ⁇ / b> E of the upstream FPC 301 is in a state of floating from the positioning unit 11.
- the downstream end 301 ⁇ / b> E of the FPC 3 is pulled out backward, and the downstream FPC 302 connected to the connector C ⁇ b> 2 incorporated in the mount 9 is connected to the connector 7.
- the state in the middle of incorporating the FPC 3 is indicated by a two-dot chain line, and the state in which the FPC 3 is drawn is indicated by 3 '.
- the mount 9 is not shown.
- the first branch portion 312 is inserted into the space formed by the FPC fixing member 4 and the internal unit, and the convex portions 3x and 3x of the FPC 3 are formed while forming the first and second curved portions 31 and 32. It fits into the concave portions 112, 112 of the positioning portion 11 (the third curved portion 33 is formed).
- the mount 9 is screwed to the fixed cylinder 1. Then, the lens barrel shown in FIG. 1 is completed.
- FIG. 4 is a cross-sectional view showing a part of the cross section of the lens barrel in the optical axis direction according to Embodiment 2 of the present invention.
- the surface on the + y direction side of the side wall 2 a of the movable member 2 is brought into contact with the surface on the ⁇ y direction side of the side wall 1 a of the fixed tube 1.
- the movable member 2 holds the movable lens group L3 (not shown) via, for example, a lens holder (not shown) provided on the ⁇ y direction side, and moves in the z direction.
- the movable lens group L3 is moved in the z direction.
- the FPC fixing member 4 is provided at a predetermined distance from the movable member 2 on the ⁇ y direction side.
- the movable lens group L3 may be moved in the z direction by rotating the movable member 2 with respect to the fixed cylinder 1 in the same manner as in the first embodiment. Further, the electric component 5 and the FPC fixing member 4 may be moved in the z direction as the movable member 2 moves.
- a non-illustrated exterior member is provided on the + y direction side of the fixed cylinder 1.
- the electrical component 5 is provided on the ⁇ y direction side of the movable member 2 and on the + z direction side of the FPC fixing member 4.
- the FPC fixing member 4 is a cylindrical member provided on the rear end side of the fixed cylinder 1 and on the inner diameter side of the movable member 2.
- FPC 3 is affixed to the outer periphery of the FPC fixing member 4. Thereby, the sticking part 36 is formed in FPC3.
- FPC 3 an FPC 3 having a developed shape shown in FIG. 3 is employed.
- the outer periphery 311 a of the bottom 311 is positioned at the rear end of the FPC fixing member 4.
- the end of the movable member 2 on the ⁇ z direction side is located slightly in front of the end of the fixed cylinder 1 on the ⁇ z direction side, and exposes the region where the positioning portion 11 of the fixed cylinder 1 exists.
- the positioning portion 11 is a groove formed by cutting out the rear end portion 16 of the fixed cylinder 1 as in the first embodiment.
- the FPC 3 is folded back from the sticking part 36 by the first bending part 31, bent so as to be orthogonal to the sticking part 36, and penetrates the positioning part 11 provided on the side wall 1 a of the fixed cylinder 1 in the embodiment. This is the same as the lens barrel 1. Further, the FPC 3 is bent and folded back in the ⁇ z direction side at a predetermined position on the downstream end 3B side from the positioning portion 11, and the connector C2 is connected to the circuit board of the camera body. Also in the present embodiment, in the positioning portion 11, as in the first embodiment, the concave portions 112 and 112 are formed, the convex portions 3x and 3x are provided on the FPC 3, and the FPC 3 and the convex portions 3x and 3x are fitted. Also good.
- the lens barrel is a lens barrel whose internal electrical components are electrically connected to the circuit board of the camera body, and is held by the fixed barrel and the fixed barrel, and the lens group is placed on the optical axis.
- a cylindrical movable member that is moved in a direction, an FPC having an upstream end connected to the electrical component and a downstream end connected to the camera body, and being spaced apart from the movable member in the radial direction, the FPC
- An FPC fixing member for fixing the FPC, and the fixing cylinder includes a positioning portion for passing and positioning the FPC, and the FPC is fixed to the FPC at a predetermined position on the downstream end side with respect to the upstream end.
- a sticking part to be attached to a side wall of the member a first bending part that is bent from the sticking part so that an outer periphery is directed to the upstream end side and is opposed to the sticking part; and the first bending part than the first bending part Predetermined downstream side In location, bent in a direction intersecting the attachment unit, and a second curved portion is guided to the positioning portion, the FPC is pressed against the object side in the positioning unit.
- the FPC since the FPC is pressed toward the object side in the positioning portion, it can be stably attached to the fixed cylinder. Further, the force that presses the FPC toward the object side in the positioning portion acts on the first and second bending portions, and the FPC can be further separated from the movable member.
- the FPC is bent so as to face the sticking portion from the sticking portion in the first bending portion, and then bent in a direction intersecting the sticking portion in the second bending portion and inserted into the positioning portion on the side wall of the fixed cylinder.
- the first bending portion is prevented from expanding toward the movable member, the FPC is prevented from coming into contact with the movable member, and the FPC is prevented from being damaged. can do.
- the FPC is folded back at the first bending portion so that the outer periphery is directed to the object side from the sticking portion, no force is applied to the FPC in the direction of peeling from the sticking portion, thereby preventing the FPC from peeling off. be able to.
- the first bending portion and the second bending portion are formed, so that the bending operation is not required, the operation time is shortened and the operation is facilitated.
- the variation in bending work can be suppressed.
- the present lens barrel even if the length of the FPC is secured to facilitate assembly, contact between the FPC and members around the FPC can be avoided, and the FPC from the sticking portion can be avoided. Peeling can be prevented and the FPC can be attached stably.
- the FPC includes a third bending portion that is bent toward the camera body at a predetermined position on the downstream end side with respect to the positioning portion.
- the FPC is bent toward the camera body at the third bending portion. Therefore, in the positioning part, the force pressing toward the object side acts on the FPC.
- the FPC includes a pair of convex portions protruding in the width direction, and the positioning portion includes a pair of concave portions into which the convex portions are fitted.
- the FPC includes a pair of convex portions.
- the positioning portion of the fixed cylinder includes a pair of concave portions into which the pair of convex portions are fitted.
- the FPC is attached to the fixed cylinder with the pair of convex portions fitted into the pair of concave portions. Therefore, it is possible to regulate the shakiness in the longitudinal direction of the FPC at the same time as regulating the shakiness in the width direction of the FPC. Therefore, it is possible to prevent the rotation of the FPC that occurs when the conventional method of providing a hole in the FPC, projecting the boss from the positioning portion, and inserting the boss into the hole to fix the FPC is employed.
- the FPC preferably has a reinforcing member attached to a portion where the convex portion is formed.
- the FPC can be prevented from being damaged because the portion fitted into the positioning portion is reinforced by the reinforcing member.
- the FPC is divided into an upstream FPC on the upstream end side of the reinforcing region to which the reinforcing member is attached, and a downstream FPC on the downstream end side of the reinforcing region. It is preferable to provide a connector electrically connected to the downstream FPC in the reinforcing region.
- the FPC is divided into the upstream FPC and the downstream FPC and is connected via the connector, so that the assemblability of the lens barrel can be improved. Further, since the connector is attached to the reinforcing region, it is possible to prevent the FPC from being damaged by the load of the connector.
- the FPC fixing member is an exterior member that is disposed on the outer diameter side of the movable member and coupled to the fixed cylinder.
- the FPC is housed in the space between the exterior member and the movable member, and accordingly, the space inside the movable member is vacant, and a large-diameter lens group is provided in the space inside the movable member.
- the movable member can be disposed near the rear end of the fixed cylinder. Therefore, it is possible to provide a lens barrel suitable for a single lens reflex interchangeable lens.
- the FPC includes a bent fourth curved portion on the upstream end side with respect to the pasting portion and in the vicinity of the electrical component.
- the FPC since the FPC includes the fourth bending portion that is bent in the vicinity of the electric component, the FPC can be attached to the fixed cylinder without hindering the operation of the movable member. Further, the length of the FPC can be ensured, and the assembly of the lens barrel can be facilitated.
- the FPC has a developed shape extending from a bottom portion, one end of the bottom portion, a first branch portion whose longitudinal direction is perpendicular to the longitudinal direction of the bottom portion, and the other end of the bottom portion, and It is preferable that a longitudinal direction has a shape provided with the 2nd branch part orthogonal to the longitudinal direction of the said bottom part, and the outer periphery of the said bottom part is positioned in the edge part by the side of the said camera main body of the said FPC fixing member.
- the FPC can be attached to the FPC fixing cylinder so that the outer periphery of the bottom portion is positioned at the end of the camera body of the FPC fixing cylinder, the position of the position where the first bending portion is formed in the FPC Deviation can be prevented.
- the lens barrel is a lens barrel for an interchangeable lens, and is mounted on the camera main body, and fixed to the mount for electrical connection with the camera main body. It is preferable that the FPC is connected to the second connector.
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Abstract
Description
図1は、本発明の実施の形態1によるレンズ鏡筒の光軸方向の一部断面図を示している。なお、図1において、z方向は光軸方向を示し、y方向は径方向を示し、x方向は幅方向を示している。また、+z方向側を物体側、-z方向側をカメラ本体側、+y方向側を外径側、及び-y方向を内径側と記述する。
図4は、本発明の実施の形態2におけるレンズ鏡筒の光軸方向の断面の一部を示した断面図である。本レンズ鏡筒は、可動部材2の側壁2aの+y方向側の面に、固定筒1の側壁1aの-y方向側の面を当接させている。また、本実施の形態では、可動部材2は、-y方向側に設けられた例えば図略のレンズホルダを介して可動レンズ群L3(図略)を保持し、z方向に移動することで、可動レンズ群L3をz方向に移動させる。また、本実施の形態では、FPC固定部材4は、可動部材2よりも-y方向側に所定距離離間して設けられている。
Claims (9)
- 内部の電気部品がカメラ本体部の回路基板に電気的に接続されるレンズ鏡筒であって、
固定筒と、
前記固定筒に保持され、レンズ群を光軸方向に移動させる円筒状の可動部材と、
上流端が前記電気部品に接続され、下流端がカメラ本体に接続されるFPCと、
前記可動部材に対して径方向に離間して配置され、前記FPCを固定するFPC固定部材とを備え、
前記固定筒は、前記FPCを通し、かつ、位置決めする位置決め部を備え、
前記FPCは、
前記上流端よりも前記下流端側の所定の位置において前記FPC固定部材の側壁に貼付けられる貼付部と、
前記貼付部から、外周が前記上流端側に向かい、かつ、前記貼付部に対向するように曲げられる第1湾曲部と、
前記第1湾曲部よりも前記下流端側の所定の位置において、前記貼付部と交差する方向に曲げられ、前記位置決め部へと導かれる第2湾曲部とを備え、
前記FPCは、前記位置決め部において前記物体側に押圧されているレンズ鏡筒。 - 前記FPCは、前記位置決め部よりも前記下流端側の所定の位置において、前記カメラ本体側に曲げられる第3湾曲部を備える請求項1記載のレンズ鏡筒。
- 前記FPCは、幅方向に突出した一対の凸部を備え、
前記位置決め部は、前記凸部が嵌め込まれる一対の凹部を備える請求項1又は2記載のレンズ鏡筒。 - 前記FPCは、前記凸部が形成された部位に、補強部材が貼り付けられている請求項1~3のいずれかに記載のレンズ鏡筒。
- 前記FPCは、前記補強部材が貼り付けられた補強領域より上流端側の上流側FPCと、前記補強領域の下流端側の下流側FPCとに分けられ、
前記上流側FPCは、前記補強領域に前記下流側FPCと電気的に接続される第1のコネクタを備える請求項4記載のレンズ鏡筒。 - 前記FPC固定部材は、前記可動部材よりも外径側に配置され、前記固定筒に結合された外装部材である請求項1~5のいずれかに記載のレンズ鏡筒。
- 前記FPCは、前記貼付部よりも前記上流端側、かつ、前記電気部品の近傍において、曲げられた第4湾曲部を備える請求項1~6のいずれかに記載のレンズ鏡筒。
- 前記FPCは、展開形状が、底部と、前記底部の一端から延び、かつ、長手方向が前記底部の長手方向に直交する第1分岐部と、前記底部の他端から延び、かつ、長手方向が前記底部の長手方向と直交する第2分岐部とを備える形状を有し、前記底部の外周が、前記FPC固定部材の前記カメラ本体側の端部に位置決めされる請求項1~7のいずれかに記載のレンズ鏡筒。
- 前記レンズ鏡筒は、交換レンズ用のレンズ鏡筒であって、
前記カメラ本体部に取り付けるためのマウントと、
前記マウントに固定され、前記カメラ本体部と電気的な接続を行うための第2のコネクタとを備え、
前記FPCは前記第2のコネクタに接続されている請求項1~8のいずれかに記載のレンズ鏡筒。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014098821A (ja) * | 2012-11-15 | 2014-05-29 | Canon Inc | レンズ鏡筒およびこれを備えた光学機器 |
JP2017181863A (ja) * | 2016-03-31 | 2017-10-05 | 日本電産サンキョー株式会社 | 配線基板付きユニットおよび磁気駆動装置 |
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JPH09211284A (ja) * | 1996-01-31 | 1997-08-15 | Minolta Co Ltd | 鏡 胴 |
JP2006145704A (ja) * | 2004-11-17 | 2006-06-08 | Olympus Corp | レンズ鏡筒及び電子機器 |
JP2006313249A (ja) * | 2005-05-09 | 2006-11-16 | Konica Minolta Photo Imaging Inc | 撮像装置 |
JP2007114529A (ja) * | 2005-10-20 | 2007-05-10 | Sony Corp | レンズ鏡筒 |
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- 2011-03-03 JP JP2012504311A patent/JP5494793B2/ja active Active
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JPH09211284A (ja) * | 1996-01-31 | 1997-08-15 | Minolta Co Ltd | 鏡 胴 |
JP2006145704A (ja) * | 2004-11-17 | 2006-06-08 | Olympus Corp | レンズ鏡筒及び電子機器 |
JP2006313249A (ja) * | 2005-05-09 | 2006-11-16 | Konica Minolta Photo Imaging Inc | 撮像装置 |
JP2007114529A (ja) * | 2005-10-20 | 2007-05-10 | Sony Corp | レンズ鏡筒 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2014098821A (ja) * | 2012-11-15 | 2014-05-29 | Canon Inc | レンズ鏡筒およびこれを備えた光学機器 |
JP2017181863A (ja) * | 2016-03-31 | 2017-10-05 | 日本電産サンキョー株式会社 | 配線基板付きユニットおよび磁気駆動装置 |
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