KR0173684B1 - Camera with annular light shielding member around axially moving lens housing - Google Patents

Abstract

An electrical signal transmission apparatus in a camera equipped with a zoom lens or a multifocal lens, comprising: a storage member including a camera body, a first screw portion holding the lens and engraved with an optical axis of the lens as an axial center, and the first screw portion; A rotating member provided with a second screw part for screwing, screwed with a preservation member via both threaded parts, and being rotatably supported on the camera body with an optical axis centered thereon; one end of which is connected to the inner circumference of the rotating member A guide member fixed to the body and extending in the optical axis direction on the fixing part and converting the rotational motion of the rotating member into the linear motion in the optical axis direction with the preservation member; a first electrical device supported by the camera body; A camera having a second electrical device supported by a storage member and a flexible substrate for electrically connecting the first electrical device and the second electrical device. In the conventional signal transmission device, the flexible substrate includes a fixed part fixed to the camera body, a bent part connected to the fixed part, an extension part connected to the bent part and extending to the rotating member and the inner circumferential surface, and the extension. And another fixing part fixed to the retaining member in contact with the portion, wherein the extension portion is provided on the guide member between the rotating member and the guide member, and the sliding motion on the guide member is straight in the straightness of the retaining member. The bent portion is accommodated in an accommodating portion provided on the outer circumferential side of the rotating member and forms a bent shape of the bent portion, and forms a restricting member that regulates the bend direction constantly.

Description

Camera's Electrical Signal Transmitter

1 is a perspective view showing the front body and the lens driving mechanism of the embodiment of the present invention.

2 is a longitudinal sectional view including the optical axis of the lens at the wide angle position.

3 is a longitudinal sectional view including the optical axis of the lens in a state where the power is disconnected.

4 is a longitudinal sectional view including the optical axis of the lens at the telephoto position.

5 is a V-V perspective cross-sectional view of FIG.

6 is a plan view of the camera.

* Explanation of symbols for main parts of the drawings

5: barrel 6: internal thread

7: Front muscle lens chamber 8: Rear muscle cam ring

9: straight back guide groove 10: latch

11: clasp suppression 12: straight key

14: lens 15: guide pin

17: front body 23: after body

27: Shutter FPC

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical signal transmission device in a camera equipped with a zoom lens or a multifocal lens, and more particularly, to a camera having an electrical device whose position is displaced with respect to the optical axis direction.

Background Art Conventionally, an electric device including a CPU, a distance measuring device, a metering device, and the like is installed in a camera, and an electric device including a shutter driver and a focusing device in a different direction connects two devices in a camera provided in a lens portion. A flexible printed circuit board (hereinafter referred to as FPC) is stored in a spiral wound or folded in a mirror barrel.

In the prior art, since the FPC is not particularly cut off from the inside of the mirror barrel, there is a part peeled off on the optical side axis, which causes the surface of the FPC to reflect scattered light, causing a virtual image. This necessitates the attachment of paints or tapes for antireflection, resulting in an increase in manufacturing costs.

In addition, the deflection of the FPC sometimes enters the passage of the light beams, that is, there is a fear of blocking the light beams. In order to prevent this in design, the structural bending and warpage are strengthened, and excessive force is applied to the FPC, resulting in deterioration of durability.

An object of the present invention is to provide an electric signal transmission device in a zoom lens or a multifocal lens camera in which an FPC connecting two devices does not lose an image due to a virtual image or a blocking, and is stored in an easy manner. .

In order to solve the above problems, in the present invention, the preservation member (5) having the camera body (17), the first screw portion (5a) engraved with the optical axis of the lens preserved and the first screw portion A rotating member (6) having a second screw portion (6b) fitted with (5a) and screwed with the preservation member via the two threaded portions, and supported by the camera body such that the optical axis is the axis of rotation; One end thereof is fixed to the camera body on the inner circumferential side of the gray bottom member 6 and extends in this optical axis direction on the fixed portion, and the rotational movement of the rotating member 6 goes straight to the storage member 5 in the optical axis direction. The guide member 12 for converting the motion, the first electrical device supported by the camera body 17, the second electrical device supported by the storage member 5, the first electrical device and the second electrical device. A flexible substrate 27 electrically connected thereto, the flexible substrate One fixing portion 27d to which the substrate 27 is fixed to the camera body 17, a bending portion 27c for connecting to the fixing portion, and an extension portion 27d for connecting to the bending portion and extending to the inner circumferential side of the rotating member. ) And another fixing portion 27a connected to the extension portion and fixed to the storage portion, wherein the extension portion 27b is provided between the rotary member 6 and the guide member 12. It is installed on the upper surface, and the sliding member on the guide member 12 in the straight line of the storage member (5) is possible, and the bent portion (27c) is in the receiving portion (31) provided on the outer peripheral side of the rotating member (6). An electrical signal transmission device for a camera, which is provided with a restriction member (17b) which forms a bending shape of the bending portion (27c) and regulates a bending direction constantly. Configured.

In addition, the regulating member 17b is formed integrally with a member constituting the accommodating portion 31, so as to constitute an electric signal transmission device for the camera according to claim 1.

In the present invention, the flexible substrate is bent in a relaxed storage portion on the outside of the rotating member, and the restricting member which always forms a curved shape forms a curved shape at a bent portion where one end of the flexible substrate is connected at the fixing portion. This gives a smooth reversal force and constantly regulates the bending direction.

Flexible substrate is short and not long

The restricting member which forms a bending shape is formed integrally with the member which comprises a storage part.

1 is a perspective view showing the front body and the lens driving mechanism in the embodiment of the present invention, FIG. 2 is a longitudinal sectional view including the optical axis of the lens in the wide angle position, and FIG. 3 is the optical axis of the lens in the power disconnected state. 4 is a longitudinal sectional view including the optical axis of the lens at the telephoto position. FIG. 5 is a second V-V perspective cross-sectional view, in which the lens driving mechanism is taken in the rear lens lens chamber including the rear guide plate, and FIG. 6 is a plan view of the camera.

The barrel 5 is housed inside the inner screw portion 6 and meshes with the threaded portion 6b formed in the barrel inner circumference.

The front lens chamber 7 is housed inside the front portion of the barrel 5 and a shutter (not shown) is stored outside the front portion.

The rear cam cam ring 8 is rotatably installed in the space of the inner side of the barrel 5 and the side of the rear straight pipe guide 9. A cam groove 8b beveled in the circumferential direction is formed in the three ring portions in the rear cam cam ring 8, and two long holes 8a are drilled in the rear end flat portion. This long hole 8a forms a guide portion for movably embedding the two rounded fin portions 10a provided in the latch 10 when the scratch 10 is joined to the flat portion.

The clasp 10 is screwed to the rear muscle cam ring 8 by the clasp suppression bis 11, and this clasp 10 loosens the clasp suppression bis 11, and thereafter, The fixing position can be changed in the range of the long hole 8a. In addition, the latch 10 is fitted in the straight groove 6c provided in the inner threaded portion 6 so as to be able to slide with the inner threaded portion 6.

In the rear rectifying straight guide tube 9, three straight grooves 9a are formed at positions that divide the circumference into three. In addition, a smooth sliding surface (not shown) which is in sliding contact with the straight key 12 is formed in parallel with the optical axis in the center portion of the outer circumference, and a band portion (not shown) which protrudes slightly on both sides of the circumferential direction of the sliding surface is the same Each one is formed in parallel. In addition, the rear rectifying straight guide tube 9 is integrally screwed to the barrel 5 by a straight guide barrel suppressing screw 13.

A lens 14a and a lens 14b are housed and fixed inside the rear lens chamber 14, and three rear root guide pins 15 are provided on the outer circumference thereof in a radial direction at a position that divides the circumference into three. Each of these three rear guide pins 15 is fitted to a cam groove 8b provided in the rear cam ring 8 and a straight groove a9 provided in the rear straight guide tube 9, and serves as a cam follower.

The back twisting spring 16 presses each back guide pin 15 against each wall rear side of the cam groove 8b to prevent the rear lens lens 14 from shifting in the optical axis direction.

The inner screw portion 6 is cylindrical and is housed inside the cylindrical hole provided in the front body 17, and in the annular pits 6d protruding on the outer circumference thereof, the inner screw portion 18a is fitted. The front plate 17 is rotatably fitted to the front body 17 by the restraining plate 18 which is screwed by the screw 19.

On the outer circumference of the internal threaded portion 6, a flexible plate circuit (Flexible Print Circuit, FPC) encoder forming an encoder is attached to an encoder pattern (not shown), which is an electrical contact, outward. . The encoder blush 21 is screwed and fixed to the front body 17 by the encoder blush suppression screw 22, and the front end of each blushing hair of the encoder blush 21 is the front body 17. It is fixed so as to contact the encoder FPC 20 attached to the internal thread part 6 through the cutting part at the lower part of the head).

The straight key 12 has a plane that is parallel to each other and forms a flat, elongated substantially flat plate shape, and is screwed by the straight key suppressor bis 24 to the rear body 23 at an upstream end thereof. It is fixed and is a guide member which extends between the rear cam cam ring 8 and the rear straight pipe guide 9 from the rear body 23 toward the front in parallel along the optical axis. The straight key 12 is located on the smooth surface of the upper side of the rectilinear guide cylinder 9, and is fitted so that it can move along an optical axis between a pair of rollers provided in the rearward rectilinear guide cylinder 9.

The roller 25 forms the shape which has a conical surface in the side surface, and a pair of roller 25 has a conical shaft in the roller-bis hole 9b provided by each one of the two strip | belt-shaped parts of the straight rectifying guide cylinder 9, respectively. Screws are provided by the roller screws 2b so as to be rotatable freely at the center.

The pair of rollers 25 are in line contact with the planes on both parallel sides of the straight key 12, respectively.

One end 27a of the shutter FPC 27 is fixed by a projection 28b formed on the shutter drive member 28 located mainly in front of the barrel 5. Thus, the extension part 27b extends from this shutter drive member 28, and is installed between the straight key 12 and the inner thread part 6, which is fixed to the rear body 23, with one end fixed to the front, and extending straight. It is laid along the upper surface of the key 12 toward the rear body, that is, toward the rear body 23 side, and when it reaches the end of the straight key 12, it is fitted in the gap between the square grooves 12a in the ascending portion connected thereto. Ascending, the bending portion 27c is housed in a smooth shape without bending in the space formed between the front body 17 and the rear body 23.

The interior space of the storage part 31 formed between the front body 17 and the rear body 23 is formed by the light transmitting part 31 and the light receiving part constituting the measuring means, as apparent by the plan view of the camera shown in FIG. It is also between 32 and behind the metering means 33 and is usually a part of the free space on the electric mounting. The shutter FPC 27 is then fixed to the projection 17a formed on the front body 17, and the other end 17d is guided to the control unit (not shown) and connected.

The storage part 31 is comprised by the storage chamber member 17d which is a part of the front body 17, and the storage chamber rear wall member 23a which is a part of the rear body 23 closes the back. Each of them is integrally formed to a high degree, so that the members contacting both sides of the shutter FPC 27 are smooth and smooth. Since the inner wall (not shown) of the accommodating part 31 has a smooth and close side with respect to the side part of the shutter FPC 27, the shutter FPC 27 does not rock to the left and right, and therefore the shutter FPC 27 is a accommodating part ( 31) is made to go in and out smoothly.

The FPC press 17b is fixedly fixed to the upper sidewall of the storage chamber member 17d in the shape of a shape perpendicular to the optical axis and parallel to the surface of the straight key 12 during navigation.

On the upper part of the pressure wall of the storage chamber member 17d, the sunshade 17e protrudes in the shape of the sunshade when sailing backward, and is integrally installed to face the FPC press 17b.

The surface of the FPC press 17b which faces the sunshade 17e is the slope part 17c which formed the smooth columnar surface. When the smooth surface is close to the circumferential surface, its radius of curvature is about 2 mm or more. Accordingly, the small shutter FPC 27 does not smoothly bend along the surface, but is impossible because the wall is attached to the deflection.

The shutter FPC 27 is fixed to the projection 17a so that a portion connected to the rear side thereof is guided between the sunshade 17e and the FPC press 17b to smoothly bend downwards and forwards along the slope 17c. I am supposed to lose.

Next, the operation of the embodiment will be described.

The motor (not shown) installed in the camera body operates according to the command of forward or retreat to the lens group based on a signal from a focus detection device (not shown) separately installed so that the drive gear (not shown) connected to this motor rotates accordingly. do. The large gear 6a provided on the outer circumference of the inner screw portion 6 is meshed with the drive gear. When the motor rotates, the inner screw portion 6 and the encoder FPC 20 attached to the outer portion of the inner screw portion 6 via the drive gear are rotated. It is integrated and rotates. At that time, the encoder pattern (not shown) provided on the surface of the encoder FPC 20 is electrically contacted by the sliding contact of the encoder blush tip 21a attached to the encoder blush 21, and the internal thread part 6 is opened and closed by the circuit opening and closing. The rotation angle of is determined. When only the rotation angle corresponding to the command is rotated, a stop signal is generated, so that the motor stops and the rotation of the associated parts is also stopped.

When the inner threaded portion 6 starts to rotate, the barrel 5 starts to move through the threaded booth 6b and the threaded portion 5a engaged with it, but is operated by the straight key 12 as described later. The rotational movement is controlled to only go straight along the optical axis.

When the inner screw portion 6 exchanges, the rear cam cam ring 8 is fitted into the straight groove 6c and rotates together with the inner screw portion 6 via the clutch 10 screwed into the rear cam ring 8. .

The rear straightening guide cylinder 9 is limited in rotation by the straight key 12 fitted to the pair of rollers 25 provided with screws, and only the straight motion is possible. The side surface of the roller 25 forms a conical shape, and rotates freely with respect to the movement of the forward retreat of the rear rectifying guide cylinder 9. In addition, the side surface of the straight key 12 is fitted to the rollers 25 on both sides which rotate in parallel to form a parallel plane, makes sliding contact with the linear contact, and guides straight through the roller 25. Moreover, since the rectus straight guide cylinder 9 is fixed by the barrel 5 and the rectus straight guide cylinder suppression screw 13, both of them move straight together.

In the rear lens lens chamber 14, when the rear cam ring 8 rotates, a rotational motion is transmitted via the rear guide pin 15 passing through the cam groove 8b. The rotational movement is limited by the straight groove 6c provided in the rear rectifying straight guide cylinder 9 through which the rear muscle guide pin 15 passes in the same manner, and the linear movement is performed along the optical axis. This is because the rotational movement of the rear straight guide tube 9 is limited by the straight key 12. The rear lens lens chamber 14 performs a predetermined relative straight motion with respect to the rear straight guide tube 9 according to the movement of the chem home 8b, and thus the rear muscle lens with respect to the front root lens which performs the straight movement integrally with the barrel 5. Is changed at predetermined intervals, and thus the zooming operation is performed. At this time, the rear lens chamber 14 is always pressed to the wall on the rear side of the cam groove 8b by the spring 16 that adjusts the rear gap, and fits between the cam groove 8b and the rear guide pin 15. May have sufficient margin.

The shutter FPC 27 extends from the tab portion 28b formed on the shutter drive member 28 on which one end 27a is fixed to the rear body 23 along the upper surface of the straight key 12. Towards, the bent portion 27c is bent in a space formed between the front body 17 and the rear body 23 at the end of the straight key 12, and ascending between the gaps of the square grooves 12a. It is stored in a smooth shape without being lost. The shutter FPC 27 slides in the straight key 12 and the square groove 12a as the barrel moves forward and backward.

In the telephoto imaging where the barrel is the most advanced, as shown in the cross section of the lens in FIG. 4, the shutter FPC 27 has less looseness as the forward portion of the lens, so that the front body 17 and the rear body 23 It is bent enough in the cross section of the space of the accommodating part 31 comprised between), but looseness is reduced and it does not become full.

At this time, the shutter FPC 27 is fixed to the protruding portion 17a, and a portion connected to the rear side thereof is guided downward between the awning 17e and the FPC press 17b to face downward, and the slope portion 17c of the FPC press 17b. By changing the direction again, it is pushed forward and the shutter PPC 27 is always forced forward. Thus, although the curvature is bent forward or downward strongly and smoothly along the smooth curved slopes 17c of 2 mm or more, it flows backward without contacting the front wall of the storage part 31. Since the force portion 27c of the shutter FPC 27 is short in this case, it extends rearward, but does not spread in the storage portion 31, does not contact the rear upper portion, and is guided between the gaps of the square grooves 12a. .

Depending on the position at the time of wide-angle imaging of the barrel portion, as shown in the second section of the lens, the shutter FPC 27 is more effective than the state when the power supply to which the barrel portion is most retracted (Figure 3) is cut off. It is greatly bent and extended to the cross section of the space of the accommodating portion 31 formed between the front body 17 and the rear body 23.

At this time, the shutter FPC 27 is fixed to the protruding portion 17a, and a portion to be connected rearward is guided between the sunshade 17e and the FPC press 17b, by the slope portion 17c of the FPC press 17b. Pushed forward, the shutter FPC 27 is always pulled forward like telephoto yarns. Therefore, it bends smoothly forward or downward along the slope part 17c, it extends in front, and is folded in front of the accommodating part 31, is in contact with a lower wall, and is guided backward. The force part 27c is long in this case, it extends rearward, and it spreads in the accommodating part 31 to the rear upper part, and is guided between the saws of the square groove 12a in contact with the rear body 23. As shown in FIG.

When the power source in which the barrel is most retracted is disconnected, the shutter FPC 27 is formed between the front body 17 and the rear body 23, as shown in FIG. 3, showing the longitudinal section including the optical axis of the lens. Several spaces are bent in the space cross section of the payment part 31, and they are spread and fully spread.

At this time, the shutter FPC 27 is fixed to the protruding portion 17a so that a portion connected to the rear portion is guided between the sunshade 17e and the FPC press 17b to the slope portion 17c of the FPC press 17b. It is pushed forward, and it is as if the shutter FPC 27 always has a force applied to the front. Therefore, it bends smoothly below the front part along the slope part 17c, and it extends to the front side fully, falls to the front wall of the accommodating part 31, and is led to the rear wall in contact with the lower wall. The curved portion 27c is longer in this case than the wide angle, and does not immediately extend backwards, but also bends twice to form one ring, and then fills up in the storage portion 31 to the rear upper portion, whereby In contact with (23), it guides between the gaps of the square groove 12a.

As described above, even when the shutter FPC 27 is long embedded in the housing, as shown in FIG. 4, the refraction is caused by the formation of an appropriate warpage phenomenon by the slope 17c of the FPC press 17b. The shutter FPC 27 is sufficiently secured in a storage space without being twisted or twisted or reversed backwards, and is accommodated in an orderly manner.

In the case where the number of lens roots is 3 or more, the effect can be obtained with the same configuration, and even in a multifocal lens that does not involve a zoom operation, the shutter FPC 27 smoothly moves on the straight key 12 with the same configuration. It is stored in the upper space.

In the present embodiment, since the FPC press 17b forms a warp shape in the retractable storage part 31 and regulates the warp direction constantly, even when telephoto, wide angle, or the power is turned off, the warp part is always 27c achieves smooth inversion, and the shutter FPC 27 is accommodated.

In addition, the shutter FPC 27 is excellent in durability without being damaged by excessive bending or the like.

In addition, since the shutter FPC 27 is not long, the cost is reduced.

Since the FPC presses 27b for forming the warp shape are integrally formed with the members constituting the housing portion 31, the degree of the members is high, and the shutter FPC 27 smoothly bends and the cost is increased. none.

According to the present invention, the flexible substrate is bent in a relaxed storage portion on the outer side of the rotating member, and the restricting member always forming a bending shape gives a regulated bending direction to the bending portion connected at the fixed portion of one end of the shutter FPC. Even when telephoto, wide angle, or when the power is turned off, the bent portion is always stored squarely.

In addition, the shutter FPC is durable without being damaged by excessive bending.

In addition, since the shutter FPC is not long, the cost is reduced.

Since the regulating member which forms a bending shape is formed integrally with the member which comprises a accommodating part, the degree of a member is high, a shutter FPC is bend | curved smoothly, and cost is not raised.

Claims (2)

A preservation member having a camera body, a first screw portion engraved with the optical axis of the lens as a preservation lens, and a second screw portion screwed to the first screw portion, and retaining members and screws through both threads. And a rotating member supported on the camera body so as to be rotatable with an optical axis as the center of rotation, and one end of which is fixed to the camera body on the inner circumferential side of the rotating member so as to extend in the direction of the optical axis on the fixed part, and the rotating member A guide member for converting a rotational motion of the rotating member into a straight motion in the optical axis direction, a first electrical device supported by the camera body, a second electrical device supported by the storage member, and the first electrical device; An electrical signal transmitting device for a camera having a flexible substrate for electrically connecting a second electrical device, wherein the flexible substrate is fixed to the camera body. And a bent part connected to the fixing part, an extension part connected to the bent part and extending to the rotating member and the inner circumferential surface, and another fixing part connected to the extension part and fixed to the storage member. The portion is provided on the guide member between the rotating member and the guide member, and the sliding member can be slid on the guide member in a straight line of the storage member, and the bent portion is stored in an accommodating portion provided on the outer peripheral side of the rotating member. And a regulating member which forms a bending shape of the bent portion and regulates a bending direction constantly. The electric signal transmission device of a camera according to claim 1, wherein the restricting member is integrally formed with a member constituting the receiving portion.