KR100988211B1 - Switching unit of exposure and camera unit - Google Patents

Abstract

Provided is an exposure condition switching unit that can contribute to thinning of the camera unit.

The lower base 100 having the opening 110 for exposure in the bottom wall 101, and having the CD 32 aligned in the opening, the bottom base 100 on which the CCD-attached circuit board 30 is fixed to the bottom surface of the bottom wall, and the bottom wall. A lens mounting hole 160 corresponding to an opening of the lens mounting hole, and a nut portion 161 to which the bolt portion 41 of the lens 40 is screwed on the inner circumference of the lens mounting hole, An upper cover 150 fixed to the lower base in a state of covering the upper surface, and accommodated to move in a space between the lower base and the upper cover, and through an opening of a lens and a lower base mounted in a lens mounting hole of the upper cover. A filter assembly 210 for switching the conditions of exposure incident on the CDD and a space built in the space between the lower base and the upper cover to drive the filter assembly. Actuator 300 is provided.

Description

Exposure condition switching unit and camera unit {SWITCHING UNIT OF EXPOSURE AND CAMERA UNIT}

The present invention relates to a camera unit comprising, as a main part, an exposure condition switching unit for a camera and the exposure condition switching unit.

Small camera units (still cameras and video camera units) are widely used in laptops, mobile phones, vehicles, and surveillance equipment. These camera units have exposure condition switching units such as filter devices, aperture devices, and shutter devices. Many things are equipped.

Conventionally, this kind of exposure condition switching unit has been generally assembled to a lens barrel (see, for example, Patent Documents 1 and 2).

Patent Document 1: Japanese Patent Application Laid-Open No. 63-309933

Patent Document 2: Japanese Patent Application Laid-Open No. 4-63331

However, when the lens barrel and the exposure condition switching unit are combined using the lens barrel, there is a problem that the size of the camera unit as a whole increases in the optical axis direction and thus the thickness of the camera unit is limited.

In view of the above circumstances, an object of the present invention is to provide an exposure condition switching unit that can contribute to thinning of a camera unit, and a camera unit constructed using the same.

The exposure condition switching unit according to the first aspect of the present invention comprises: a lower base having a bottom portion on which a circuit board on which the photographing element is mounted is mounted on a lower surface of the bottom wall, having an opening for exposure at the bottom wall and an alignment of the photographing element at the opening; And a lens mounting hole corresponding to the opening of the bottom wall, and a screw portion for screwing the screw portion of the lens around or around the lens mounting hole, and covering the upper surface of the lower base with the lower base. Is incident on the photographing element through an opening of the lower base and a lens mounted in a lens mounting hole of the upper cover, the upper cover being fixed to the upper cover, and spaced between the lower base and the upper cover. The movable member which switches conditions of exposure, and the said In order to drive the movable member is characterized in that it comprises an actuator built in the space between the lower base and the upper cover.

The invention of claim 2 is the exposure condition switching unit according to claim 1, wherein the screw portion on the lens side is a bolt, and the nut is formed on the inner circumference of the mounting hole of the upper cover, as the screw portion on the upper cover side. .

According to a third aspect of the present invention, there is provided an exposure condition switching unit according to claim 1 or 2, wherein the movable member comprises a filter assembly configured by attaching and removing an optical filter into and out of a position on an opening of the lower base to a planar filter body. The optical actuator is inserted into and removed from the position on the opening by moving the filter body.

The invention according to claim 4 is the exposure condition switching unit according to claim 3, wherein the plank-shaped filter body is attached to a rotational point set so as to be positioned near the center on the plate surface of the filter body while being located away from the opening portion, and thus the lower base. It is rotatably installed in the surface along the bottom wall of the said optical filter, It is arrange | positioned at the position corresponding to the said opening part in parallel with one side with respect to the said rotation point when the said filter body rotated, It arrange | positioned side by side I am doing it.

The invention of claim 5 is the exposure condition switching unit according to claim 4, wherein when the side on which the plurality of optical filters are disposed is set to one end side, one end side and the other end side of the filter assembly on the other end side on the filter body on the opposite side. Balance weights for adjusting the weight balance for the rotation point of is characterized in that it is provided.

According to a sixth aspect of the present invention, there is provided an exposure condition switching unit according to claim 5, wherein the actuator includes a rotation lever that rotates in a plane along a bottom wall of the lower base about a rotation point, and the rotation point of the filter body. And a rotation point of the rotary lever are disposed at opposing positions with the opening interposed therebetween, and between the rotation point of the filter body and the rotation point of the rotary lever, the rotary lever and the filter body are adapted to the rotation of the rotary lever. The filter body is coupled so as to rotate, and both rotation points of the filter body and the rotation lever are arranged in a diagonal direction of the lower base and the upper cover having a substantially rectangular plane.

According to a seventh aspect of the present invention, in the exposure condition switching unit according to the sixth aspect, the actuator comprises a coil body and a rotary lever in which a magnet is accommodated in a magnet holder portion which is assembled to be rotatable to the coil body and positioned in the coil body. And an air core coil mounted on the coil body to generate a driving force between the magnet by a magnetic force generated by energization, and rotating the rotary lever, wherein one of the magnet holder portions of the coil body and the rotary lever is rotated. By engaging the convex portion provided with the concave portion provided in the other side, the rotation point of the said rotation lever is comprised, and the rotation point is arrange | positioned near the center of the projection surface of a magnet when it sees from the rotation axis direction of a rotation lever. It is characterized by.

The invention of claim 8 is the exposure condition switching unit according to claim 7, wherein the coil body includes an upper plate and a lower plate positioned above and below the magnet holder portion of the rotary lever, and the magnet holder portion and the coil body of the rotary lever. The convex portion and the concave portion provided at one side and the other side of the upper side and the lower side are joined using at least one of the warpages, and then the air core coil is mounted on the outer side of the upper side and the lower side to the outside of the upper side and the lower side. The curvature of is limited, whereby the rotary lever does not come out of the coil body.

According to a ninth aspect of the present invention, there is provided an exposure condition switching unit according to claim 3, wherein the planar filter body is provided so as to slide linearly along the bottom wall of the lower base on the opening, and the optical filter is A plurality of actuators are arranged side by side in the slide direction, and the actuators of the linear motion type are arranged in the side of the portion provided so that the filter body can slide in the driving direction in parallel with the slide direction of the filter body. The movable part and the filter body have a rotation point in the middle of their longitudinal direction, and both ends thereof are connected to each other by rotary levers respectively coupled to the movable part of the actuator and the filter body, and the linear parts are moved by linear movement of the movable part of the actuator. filter That is characterized in that it is configured so as to slide linearly.

According to a tenth aspect of the present invention, in the exposure condition switching unit according to claim 9, a coil for generating a magnetic force by energization is provided in a fixing portion of the actuator, and a movable portion of the actuator is provided in accordance with a magnetic force of the coil. Magnets that generate a driving force and move linearly between and are provided, and yokes for reinforcing the magnetic force of the coils are provided on both sides of the coil, and the coil and the external lead wire are electrically connected to the outside of one yoke. A small circuit board for connection is arranged, and the small circuit board is exposed to the outside from the cutout portion formed on the side surface of the lower base.

The invention of claim 11 is the exposure condition switching unit according to claim 1 or 2, wherein the movable member comprises a shutter member for opening and closing the opening of the lower base.

According to a twelfth aspect of the present invention, there is provided an exposure condition switching unit according to claim 1 or 2, wherein the movable member comprises an aperture member for adjusting the opening degree of the opening of the lower base.

A camera unit according to claim 13 fixes a circuit board on which a photographing element is mounted on a lower surface of a lower base of an exposure condition switching unit according to any one of claims 1 to 12, and a lens on an upper cover of the exposure condition switching unit. It is characterized in that the integration is made by mounting.

According to the invention of claim 1, since the lens mounting hole is formed in the upper cover constituting the unit, and the screw portion for screwing the screw portion of the lens is formed around or around the lens mounting hole, the lens is directly attached to the upper cover. Can be attached by screwing. That is, when attaching a lens to the unit, a barrel having a length in the optical axis direction can be omitted. Therefore, in the case where the camera unit is constructed by assembling a circuit board and a lens on which the photographing element is mounted in this unit, the optical axis dimension of the camera unit can be shortened, and the camera unit can be thinned.

According to the invention of claim 2, since the nut is formed in the inner circumference of the lens mounting hole of the upper cover and screwed with the bolt on the lens side, for example, a cylindrical part is formed around the mounting hole of the upper cover, The unit can be thinner as compared to the case where a bolt is formed in the screw and a nut on the lens side is screwed into the bolt.

According to the invention of claim 3, since the conditions of exposure incident on the imaging element are switched by inserting and removing the filter, an image utilizing the filter effect can be recorded. In addition, since the filter assembly is planar, it can contribute to thinning of the camera unit. In this case, a plurality of optical filters can be attached on the filter body, and as a combination thereof, a combination of an ND filter and a dummy filter, a combination of an IR cut filter and a dummy filter, two overlapping filters and a dummy filter of an ND and an IR Can be freely selected.

According to the invention of claim 4, since the rotation point of the filter assembly is set near the center of the filter body, the filter assembly can be rotated in a balanced manner, and the driving load can be reduced. In addition, since a plurality of optical filters are arranged in one side with respect to the rotation point, the rotation angle when switching the filter to be used is not required to be increased, thereby reducing the driving burden and contributing to the compactness of the configuration.

According to the invention of claim 5, since the balance weight is provided on the front end side (the other end side) of the filter body, the position of the rotation point of the filter assembly is moved to the front end side as much as possible in the vicinity of the center while maintaining the weight balance of the filter assembly. It can arrange | position to a biased position, the space of the base end side (one end side) of a filter body can be taken large by that much, and the spare space at the time of arrange | positioning a some optical filter can be ensured.

According to the invention of claim 6, the rotation point of the filter body and the rotation point of the rotation lever are opposed to each other with the opening of the lower base interposed therebetween, and the two positions in the diagonal direction of the lower base and the upper cover having a substantially rectangular shape in the plane. Since it is arranged in, the length of the arm of the rotary lever can be set longer than the size of the lower base and the upper cover. Therefore, as long as the length of the arm can be set, the amount of rotational displacement of the tip of the arm can be largely increased without increasing the rotational angle of the rotation lever, so that even a large area optical filter can be switched with a margin, The degree of freedom in the arrangement of the elements constituting the mechanism can also be increased.

According to the seventh aspect of the present invention, since the rotation point of the rotation lever is set near the center of the large magnet, it is possible to improve the rotational balance of the rotation lever and contribute to the smooth rotation of the rotation lever.

According to the eighth aspect of the present invention, the concave portion and the convex portion are joined by using the bending of the upper plate and the lower plate of the coil body, so that the magnet holder portion of the rotating lever is fitted into the coil body. can do. Furthermore, after assembling the rotary lever to the coil body, by mounting the air core coil on the coil body, the bending of the upper plate and the lower plate of the coil body is restricted so that the rotary lever is not pulled out, so that the actuator as an assembly can be easily handled.

According to the ninth aspect of the invention, the filter body is arranged to slide linearly, and the linear actuator is disposed in parallel with the slide direction of the filter body, and the movable part and the filter body of the actuator are arranged in the middle of their longitudinal direction. Since it is connected via the rotary lever which has a rotation point, the compact arrangement | positioning of a filter switching mechanism part can be implement | achieved, and it can contribute to miniaturization of an exposure condition switching unit.

According to the invention of claim 10, since yokes are provided on both sides of the coil, it can contribute to the improvement of the drive efficiency of the actuator. In addition, since the small circuit board which electrically connects a coil and an external lead wire is arrange | positioned on the outer side of one yoke, and the circuit board was exposed from the cut part formed in the side surface of the lower base, connection of an external lead wire can be simplified. have.

According to the invention of claim 11, since the opening is opened and closed by the shutter member, an image utilizing the shutter effect can be recorded.

According to the invention of claim 12, since the opening degree of the opening portion is adjusted by the aperture member, an image utilizing the aperture effect can be recorded.

According to the camera unit of the thirteenth aspect, since the exposure condition switching unit according to any one of claims 1 to 12 is used, the overall thinning can be realized.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

1 to 23 are explanatory views of the first embodiment, and FIGS. 24 to 33 are explanatory views of the second embodiment. The first and second embodiments show a filter switching unit as the exposure condition switching unit of the present invention, and also show a camera unit constructed by attaching a lens and a circuit board with a CD attached to the filter switching unit.

First Embodiment

The filter switching unit of the first embodiment is of a rotation type for switching an optical filter by rotating a filter assembly as a movable member, which will be described in detail below.

FIG. 1 is an exploded perspective view showing the filter switching unit 10 and all elements constituting the camera unit 20 in combination thereto. The filter switching unit 10 is a filter in which the lower base 100 and the upper cover 150 constituting the housing and the optical filters 220A and 220B having two different optical characteristics are attached to the filter body 210A. Assembly 210 and an electronic actuator 300 for driving filter assembly 210.

The camera unit 20 is constructed by assembling the lens 40 and the CD-attached circuit board 30 to the filter switching unit 10.

2 and 3 show the structure of the lower base 100, FIG. 4 shows the structure of the upper cover 150, and FIGS. 5 to 7 show the filter switching mechanism 200 on the lower base 100. As shown in FIG. 8 and 9 are external views of the camera unit 20 in which the lens 40 and the circuit board 30 are assembled in the filter switching unit 10, and FIG. It is sectional drawing of the camera unit 20. FIG. 11-20 is a figure which shows the structure of the filter switching mechanism part 200, and the structure of the element.

As shown in FIGS. 1-4, the lower base 100 and the upper cover 150 are each comprised by the resin molded article, and the plane has a substantially rectangular shape. The lower base 100 has a shallow box-shaped bottom formed by standing the circumferential wall 102 having a constant height at the edge of the bottom wall 101, and has a circular opening 110 for exposure in the center of the bottom wall 101. ) Is formed.

In addition, on the lower surface of the bottom wall 101, the CCD attached circuit board 30 on which the CD (imaging element) 32 is mounted is fixed on the substrate main body 31. In other words, the lower surface of the bottom wall 101 is provided with a substrate attaching cylinder 103 which can fix the circuit board 30 in a state in which the CD 32 is aligned directly under the opening 110 for exposure. The circuit board 30 is formed on the lower end surface of the substrate attachment cylinder 103 in a state where the CD 32 mounted on the surface is accommodated in the CD receiving recess 103a inside the substrate attachment cylinder 103. It can be fixed by the two screws 14 in close contact.

The boss portion formed convexly protruding toward the outer circumferential side of the substrate attachment cylinder portion 103 is provided with a screw engaging hole 105 for this purpose, and the screw 14 is formed in the substrate body 31 of the CAD circuit board 30. The screw insertion hole 35 for passing the through is formed.

The substrate body 31 has a rectangular shape corresponding to the lower base 100, and is attached to two opposite corner portions for screwing to be fixed to the attaching member in the state assembled as the camera unit 20. The hole 36 is formed. Moreover, although the CD32 is mounted as the imaging element in the center of the upper surface of the board | substrate main body 31, you may of course mount other imaging elements.

In addition, on the lower surface of the bottom wall 101 of the lower base 100, a small circuit board 50 for connecting the terminal of the coil 300 of the actuator 300 (to be described later) fixed to the actuator housing portion 120 and the external lead wire is screwed. (16) is attached.

In addition, a screw engaging hole 104 and a positioning boss 107 for attaching and fixing the upper cover 150 are formed on the upper surface of the lower base 100. Moreover, the convex shaft 111 which becomes the rotation point of the filter assembly 210 protrudes on one side with the opening part 110 for exposure interposed, and the actuator accommodating part for accommodating the actuator 300 on the other side ( 120 is formed.

The actuator 300 accommodated in the actuator accommodating part 120 is provided in detail later, but is provided with the rotation lever 270 which can rotate about a rotation point, and the rotation point of the rotation lever 270 is carried out. This is located at the position facing the convex shaft 111 with the opening part 110 interposed therebetween. In particular, the rotation point of the filter assembly 210 and the rotation point of the rotation lever 270 are disposed on the diagonal of the lower base 100 and the upper cover 150 in a substantially rectangular shape.

The actuator accommodating part 120 is formed lower than the base wall 101, and the coil body 240 which comprises the actuator 300 is formed at the bottom of the actuator accommodating part 120 by one touch. A pair of engagement arms 121 for fixing and three positioning holes 129 for accurately positioning the coil body 240 at the time of fixing are formed.

On the other hand, the upper cover 150 which covers the upper side of the lower base 100 has the lens mounting hole 160 corresponding to the opening part 110 for exposure of the lower base 100 in the center of the substantially square upper surface plate 151. And a nut portion 161 on which the bolt portion 41 of the lens 40 is screwed is formed on the inner circumference of the lens mounting hole 160. The upper cover 150 is fixed to the lower base 100 with a screw 12 in a state covering the upper surface of the lower base 100, and corresponds to the screw engaging hole 104 of the lower base 100. The screw insertion hole 154 and the positioning hole 157 into which the positioning boss 107 is inserted are provided. Further, a stopper 162 is formed at the lower end of the lens mounting hole 160 of the upper cover 150 to limit the height of the lens 40 to be fitted therein.

The lens 40 attached to the lens mounting hole 160 is configured as an integrally molded article made of transparent resin, and as shown in FIGS. 1 and 10, the opening of the lower base 100 in the center thereof. A circular lens portion 40A having a diameter slightly larger than 110 is provided, and a ring-shaped edge portion 42 is provided around the bolt, and a bolt is formed around the lower end of the ring-shaped edge portion 42. The part 41 is provided. Thus, by forming the bolt portion 41 screwed to the nut portion 161 of the upper cover 150 directly on the lens 40, the lens 40 to the filter switching unit 10 without using an unnecessary barrel. I can attach it. That is, the filter switching unit 10 serves as a lens mount.

In the filter switching unit 10 of the present embodiment, the filter switching mechanism part 200 is assembled to the lower base 100, and the upper cover 150 is covered with the filter switching mechanism part 200 to fix the filter switching unit part 200. It demonstrates.

As shown in Figs. 5 to 7 and 10, the filter switching mechanism 200 is located in the space between the lower base 100 and the upper cover 150 (not shown in the drawings in Figs. 5 to 7). It is received, and consists of a filter assembly 210 and an actuator 300 for driving the filter assembly 210. The filter assembly 210 enters the CD 32, which is a photographing element, through the lens 40 mounted in the lens mounting hole 160 of the upper cover 150 and the opening 110 for exposure of the lower base 100. It corresponds to the movable member which switches the conditions of exposure to make.

The filter assembly 210 is formed by attaching two optical filters 220A and 220B which are inserted into and removed from the position on the opening 110 for exposure of the lower base 100 to the plate-shaped filter body 210A. By rotating the filter body 210A by the 300, the optical filters 220A and 220B can be inserted and removed with respect to the position on the opening 110.

As shown in Figs. 11 and 12, the filter body 210A is rotated to be inserted into the convex shaft 111 of the lower base 100 near the center of the plate body 212 having an approximately outer shape. It has a hole 211, and the rotary hole 211 is inserted into the convex shaft 111 of the lower base 100, the lower part of the rotation center composed of the convex shaft 111 and the rotating hole 211 It is possible to rotate in the plane along the bottom wall 101 of the base 100.

The convex shaft 111 is at a position slightly away from the opening 110, and at a position on the filter body 210A passing through the opening 110 when the filter body 210A rotates about the convex shaft 111, Two circular transmission holes 213A and 213B are formed, and rectangular optical filters 220A and 220B are attached to each transmission hole 213A and 213B. As the combination of the two optical filters 220A and 220B, a combination of an ND filter and a dummy filter, a combination of an IR cut filter and a dummy filter, a combination of an ND and IR two-layer superimposed filter and a dummy filter, etc. You can choose freely.

Two optical filters 220A and 220B are arrange | positioned in parallel at the position which shifted to one side with respect to the rotation point (rotation hole 211). In addition, when the side in which these optical filters 220A and 220B are arrange | positioned is made into the one end side (base end side), the other end side (front end side) on the filter body 210A of the opposite side is one end of the filter assembly 210. The balance weight 219 for adjusting the weight balance with respect to the rotation point (the convex shaft 111 and the rotation hole 211) of the side and the other end side is formed. The balance weight 219 is formed by making the front end of 210 A of filter bodies thick.

As shown in Fig. 12, the two rectangular optical filters 220A and 220B are arranged side by side on the upper surface of the filter body 210A by making one side substantially parallel and close to each other, and the filter body 210A. The spring-shaped pressure plate 230 that extends over the rim of both filters 220A and 220B is positioned in a state of being coupled to a plurality of claws 216 and the positioning protrusions 214 and 218 formed in Covered from above, the tip 231 and the both wing portions 232 of the pressing plate 230 are positioned and fixed at a predetermined position on the filter body 210 by inserting the coupling claw 217 on the filter body 210A. It is.

In addition, between the two transmission holes 213A and 213B of the filter body 210A, a long line extending along a straight line subtracted from the center of the rotation hole 211 to the midpoint of the center of the two transmission holes 213A and 213B. The hole 215 is formed, and the long plate 235 is also formed in the pressure plate 230 to overlap the long hole 215. This elongate hole 215 is a slide hole for engaging so that the drive pin 285 of the tip of the rotation lever 270 of the actuator 300 mentioned later may slide.

Next, the actuator 300 is demonstrated.

As shown in FIG. 13, the actuator 300 includes a coil body 240 made of a resin molded product, and a magnet holder portion 275 assembled to rotate in the coil body 240 and positioned in the coil body 240. The rotary lever 270 that accommodates the magnet 272 in the coil body 240 and the magnet 272 by the magnetic force generated by energization to rotate the rotary lever 270 It consists of an air core coil 290. The rotation lever 270 is in the surface along the bottom wall 101 of the lower base 100 around the rotational point in the state which installed the actuator 300 in the actuator accommodating part 120 of the lower base 100. It is installed as it rotates.

The coil body 240 faces the front plate 242 having an opening 260 for protruding the tip of the rotation lever 270 and parallel to each other so as to protrude from the rear surface of the front plate 242 in the vertical direction. Vertically on the outer surface of the upper and lower plates 243 and 244, the left and right side plates 245 and 246 provided so as to protrude at the rear surface of the front plate 242 at left and right sides, and the left and right side plates 245 and 246. A sliding guide 247 having a cross section for attachment fixing formed is provided with a U-shape, and a rear surface surrounded by the front plate 242, the upper plate 243, the lower plate 244, and the left and right side plates 245 and 246 is provided. In the open rectangular space, the magnet holder portion 275 of the rotation lever 270 can be accommodated to rotate.

A coupling step portion 247a is formed at an inner lower end of each sliding guide 247, and the actuator housing portion 120 is formed when the coil body 240 is accommodated in the actuator storage portion 120 of the lower base 100. The tip coupling claw of the coupling arm 121 formed to protrude from the bottom of the coupling body is coupled to the coupling step 247a of the coil body 240 so that the coil body 240 can be securely fixed to the lower base 100. It is. The sliding guide 247 functions to guide the receiving operation of the coil body 240 by sliding the coupling body 121 when the coil body 240 is accommodated in the actuator accommodating portion 120.

In addition, as shown in FIG. 15, when the coil body 240 is accommodated in the actuator housing portion 120 of the lower base 100, the bottom surface of the coil body 240 is disposed on the bottom surface of the actuator housing portion 120. Three positioning projections 249 are provided to determine the attachment position of the coil body 240 by inserting into the formed positioning holes 129.

In addition, in the position corresponding to the upper and lower sides of the upper plate 243 and the lower plate 244, the cylindrical convex shaft (convex portion) 281 protruding upward and downward of the magnet holder portion 275 in the rotation lever 270 is rotated. Circular bearing holes 243a and 244a are formed so that they can be inserted, and the upper plate 243 and the lower plate 244 of the front side (back side) of the circular bearing holes (concave part) 243a and 244a are formed. On the opposite surface, guide inclined surfaces 243b and 244b are formed so that the cylindrical convex shaft (convex portion) 281 of the rotary lever 270 can be easily inserted toward the bearing holes 243a and 244a. have. 14, a pair of thin diameter yoke pin insertion holes 248 formed in the thickness of the plate of the front plate 242 are formed on the left and right sides of the front plate 242, and such yoke pin insertion holes 248 are formed. ), The yoke pins 258 are respectively press-fitted. The yoke pin 258 generates a suction action between the magnet 272 of the rotary lever 270, and sucks the rotary lever 270 to either of the rotational limits during non-operation. Play a supportive role.

An insertion gap 250 for inserting the air core coil 290 is formed between the left and right side plates 245 and 246 and the left and right edges of the upper plate 243 and the lower plate 244. The air core coil 290 has an angled cylindrical shape having four edge portions, the upper edge portion of which is inserted into the upper surface side of the upper plate 243 of the coil body 240, and the lower edge portion of the lower plate of the coil body 240 ( 244 is inserted into the lower surface side, and the left and right sides thereof are inserted into the insertion interval 250.

As shown in Fig. 16, the rotary lever 270 is inserted into and fixed to the rotary lever body 271 made of a resin molded article having a magnet holder portion 275 and an arm 276, and a magnet holder portion 275. Consisting of a magnet 272.

As shown in Fig. 17, the magnet holder portion 275 has a front wall 282, an upper wall 277 and a lower wall 278 formed so as to protrude in parallel with each other on the rear surface of the front wall 282, and an outer surface thereof. A rectangular parallelepiped magnet is formed in a rectangular space 280 formed of a left and right side wall 279 formed of an arcuate surface and surrounded by a front wall 282, top and bottom walls 277 and 278, and a left and right side wall 279. 272) can be inserted from the back side.

On the upper surface of the upper wall 277 and the lower surface of the lower wall 278, the convex shaft 281 inserted into the upper plate 243 of the coil body 240 and the bearing holes 243a and 244a of the lower plate 244 is formed to protrude. On the inlet side of the lower surface of the upper wall 277 to the space 280, the engaging projection 277a is formed so as not to pull out the inserted magnet 272.

The arm 276 extends linearly forward from the front wall 282, and a driving pin 285 coupled to the long hole 215 of the filter body 210A is provided at the front end lower surface of the arm 276. It is formed to protrude.

Next, the assembly procedure will be described.

When assembling the actuator 300, first, as shown in Fig. 16, the magnet 272 is inserted into the magnet holder portion 275 of the rotary lever body 271 to assemble the rotary lever 270. When the magnet 272 is inserted, the magnet 272 is pressed against the engaging projection 277a and inserted while bending the upper wall 277 slightly. When inserted inward, the upper wall 277 returns from bending, so that the engaging projection 277a engages with the rear end of the magnet 272 to prevent the magnet 272 from falling out. At this time, when the magnet 272 rattles, the adhesive is injected from a suitable hole to securely fix the magnet 272.

The magnet 272 is magnetized in the longitudinal direction (left and right directions), and is accommodated in the magnet holder portion 275 of the rotary lever body 271 to assemble the rotary lever 270 to the left and right side walls 279 side. There are N pole and S pole. The convex shaft 281 is provided so as to be located near the center of the projection area of the magnet 272 when viewed from above.

When the rotary lever 270 is assembled, as shown in FIG. 13, it is assembled to the coil body 240 next. That is, the tip of the arm 276 passes through the opening 260 of the front plate 242 of the coil body 240, and the magnet holder portion 275 of the rotation lever 270 is disposed between the upper plate 243 and the lower plate 244. Insert it into the space. The coil body 240 uses the convex shaft 281 protruding from the upper and lower surfaces of the magnet accommodating portion 275 of the rotation lever 270 using the guide inclined surfaces 243b and 244b of the upper plate 243 and the lower plate 244. ) Into the bearing holes 243a and 244a. At that time, after the upper plate 243 and the lower plate 244 are slightly folded outward, the convex shaft 281 is returned to its original position in the step where the convex shaft 281 is fitted into the bearing holes 243a and 243b.

In this way, by inserting the convex shaft 281 of the rotary lever 270 into the bearing holes 243a and 244a of the coil body 240, the rotary lever 270 is assembled to rotate on the coil body 240. The convex shaft (convex portion) 281 and the bearing holes 243a and 244a become the rotation points of the rotation lever 270. In this assembly, the tip of the arm 276 of the rotation lever 270 protrudes out from the opening 260 of the front plate 242 of the coil body 240, and the left and right edges of the opening 260 are the rotation lever. It serves as a stopper defining the rotational limit of 270.

When the rotary lever 270 is assembled to the coil body 240, the air core coil 290 is attached to the coil body 240 as shown in Figs. That is, the upper edge portion of the angled cylindrical core core 290 is inserted into the upper surface side of the upper plate 243 of the coil body 240, and the lower edge portion of the lower core coil 290 of the coil body 240 is formed. It is inserted in the lower surface side, and the left-right side part of the air core coil 290 is inserted in the insertion gap 250 inside the left and right side plates 245 and 246 of the coil body 240. As shown in FIG.

By doing so, the air core coil 290 restricts the warp to the outside of the upper plate 243 and the lower plate 244 of the coil body 240, so that the convex shaft 281 of the rotary lever 270 is the coil body 240. Can be prevented from falling out from the bearing holes 243a and 244a.

At this stage, the assembly of the actuator 300 shown in Figs. 19 to 21 is completed. In this actuator 300, when the air core coil 290 is electrically energized, the air core coil 290 generates a magnetic field in the front-rear direction. Therefore, when the front side is the N pole, the S pole side of the magnet 272 is sucked, and the front side is S. At the pole, the N pole side of the magnet 272 is attracted to give the rotation lever 270 a rotational driving force, and the arm 276 rotates in either direction of the arrow in FIG.

Next, as shown in FIGS. 5 to 7, the filter switching mechanism 200, which is a combination of both, is assembled to the lower base 100 while combining the filter assembly 210 and the actuator 300. At that time, first, the rotation hole 211 of the filter body 210A of the filter assembly 210 is inserted into the convex shaft 111 of the lower base 100. Subsequently, the coil body 240 of the actuator 300 is assembled to the actuator housing portion 120 of the lower base 100.

That is, the coupling arm 121 positions the coil body 240 by inserting the three positioning pins 249 at the lower end of the coil body 240 into the three positioning holes 129 on the lower base 100 side. To the coupling step 247a of the sliding guide 247, thereby fixing the coil body 240 to the lower base 100. As a result, the actuator 300 is fixed to the lower base 100.

At that time, the drive pin 285 at the tip of the rotary lever 270 of the actuator 300 is engaged with the elongated hole 215 of the filter body 210A. Accordingly, in the middle of the rotation point (rotation hole 211 and convex shaft 111) of the filter body 210A and the rotation point of the rotation lever 270 (bearing holes 243a and 244a and the convex shaft 281). The rotary lever 270 and the filter body 210A are connected to rotate the filter body 210A by the rotation of the rotary lever 270.

Further, the lower base 100 in which the rotation point of the filter body 210A and the rotation point of the rotation lever 270 face each other with the opening 110 for exposure interposed therebetween, and the plane is formed in a substantially rectangular shape. And both rotation points of the filter body 210A and the rotation lever 270 line in a diagonal direction of the upper cover 150.

When the filter switching mechanism 200 including the filter assembly 210 and the actuator 300 is assembled to the lower base 100, the air core coil 290 and the small circuit board 50 are electrically connected to each other. Top cover 150 is covered thereon. The upper cover 150 is fixed to the lower base 100 with screws 12. This completes the filter switching unit 10.

Herein, the lens 40 is attached to the lens mounting hole 160 of the upper cover 150 of the filter switching unit 10, and the CD attached circuit board 30 is screwed to the lower surface of the lower base 100. 14). By doing so, the camera unit 20 shown in FIGS. 8-10 is completed.

In this filter switching unit 10, when the air core coil 290 is energized, the state shown in FIG. 22 or the state shown in FIG. That is, by rotating the rotation lever 270, the filter assembly 210 rotates to one or the other, and one or the other of the two filters 220A and 220B is positioned on the opening part 110 for exposure. Light passing through the filters 220A and 220B is incident on the CD 32.

The effect is next.

In the filter switching unit 10, the lens mounting hole 160 is formed in the upper cover 150 constituting the unit, and the bolt portion 41 of the lens 40 is formed on the inner circumference of the lens mounting hole 160. Since the nut portion 161 is formed to be screwed together, the lens 40 may be directly attached to the upper cover 150 by screwing. That is, when attaching the lens 40 to the unit 10, the barrel having the length in the optical axis direction can be omitted. Therefore, in the case where the camera unit 20 is constructed by assembling the circuit board 30 and the lens 40 attached to the unit 10, the optical axis dimension of the camera unit 20 can be shortened. The camera unit 20 can be thinned.

In addition, since the conditions of exposure incident on the CD 32 are switched by the insertion and withdrawal of the optical filters 220A and 220B, an image utilizing the filter effect can be recorded. In addition, since the filter assembly 210 has a plank shape, it may contribute to the thinning of the camera unit 20.

Moreover, since the rotation point (rotation hole 211 and convex shaft 111) of the filter assembly 210 was set near the center of the filter body 210A, the filter assembly 210 can be rotated in a balanced manner, and the actuator ( The driving load of 300 can be reduced. Moreover, since the two optical filters 220A and 220B are gathered and arrange | positioned to the rotation point (rotation hole 211 and the convex shaft 111) to one side, the rotation angle at the time of switching the filters 220A and 220B to be used It is not necessary to increase the size, which reduces the driving burden and contributes to the compactness of the configuration.

Moreover, since the balance weight 219 is formed in the front end side (other end side) of 210 A of filter bodies, the position of the rotation point (rotation hole 211 and the convex shaft 111) of the filter assembly 210 is filtered. While maintaining the weight balance of the assembly 210, it is possible to arrange it in the position biased toward the front end side as much as possible in the vicinity of the center, so that the space at the proximal end (one end side) of the filter body 210A can be largely increased, and a plurality of optical The extra space when arranging the filters 220A and 220B can be secured.

In addition, the rotation point (rotation hole 211 and convex shaft 111) of the filter body 210A and the rotation point (convex shaft 281 and bearing holes 243a and 244a) of the rotation lever 270 are connected to the lower base ( Since the openings 110 of the 100 are opposed to each other with the planes disposed at two positions in the diagonal direction of the lower base 100 and the upper cover 150 having a substantially rectangular shape, the lower base 100 and Compared with the size of the upper cover 150, the length of the arm 276 of the rotary lever 270 can be set longer. Therefore, as long as the length of the arm 276 can be set, the amount of rotational displacement of the tip of the arm 276 can be largely increased without increasing the rotation angle of the rotation lever 270 so that a large area of the optical filter 220A can be obtained. 220B) can be switched with a margin, and the degree of freedom of arrangement of the elements constituting the filter switching mechanism 200 can be increased.

Moreover, since the rotation point (the convex shaft 281 and the bearing holes 243a and 244a) of the rotation lever 270 is set near the center of the heavy magnet 272, the rotation lever 270 is balanced well. This can contribute to smooth rotation of the rotation lever 270.

The magnet holder portion 275 of the rotary lever 270 is connected by engaging the bearing holes 243a and 244a and the convex shaft 281 while utilizing the bending of the upper plate 243 and the lower plate 244 of the coil body 240. Since the coil body 240 is to be fitted, the coil body 240 and the rotation lever 270 can be easily assembled. In addition, after assembling the rotary lever 270 to the coil body 240, by attaching the air core coil 290 to the coil body 240, the bending of the upper plate 243 and the lower plate 244 of the coil body 240 is limited. Since the rotary lever 270 is not pulled out, the handling of the actuator 300 as an assembly becomes easy.

In the above embodiment, the case where the movable member driven by the actuator 300 is the filter assembly 210 has been described, but the movable member may be constituted by a shutter member that opens and closes the opening 110 of the lower base 100. In that case, an image utilizing the shutter effect can be recorded. In addition, the movable member may be constituted by an aperture member for adjusting the opening degree of the opening 110 of the lower base 100, and in that case, an image utilizing the aperture effect can be recorded.

Next, a second embodiment of the present invention will be described.

Second Embodiment

The filter switching unit of the second embodiment is a linear motion type in which the optical filter is switched by linearly moving the filter assembly as the movable member instead of rotating, and this will be described in detail below.

Fig. 24 is an exploded perspective view showing the filter switching unit (exposure condition switching unit) 1010 and all elements constituting the camera unit 1020 in combination with this. The filter switching unit 1010 includes a lower base 1100 and an upper cover 1150 constituting a housing, and a filter in which optical filters 220A and 220B having two different optical characteristics are attached to the filter body 1210A. Assembly 1210 and an electronic actuator 1300 for driving filter assembly 1210. The combination of the two optical filters 220A and 220B is the same as that described in the first embodiment.

The camera unit 1020 is configured by assembling the lens 40 and the CD-attached circuit board 30 to the filter switching unit 1010.

25 and 26 show the structure of the lower base 1100, FIG. 27 shows the structure of the upper cover 1150, and FIGS. 28-30 show the filter switching mechanism 1200 on the lower base 1100. 31 and 32 are external views of the camera unit 1020 constructed by assembling the lens 40 and the circuit board 30 in the filter switching unit 1010, and FIG. A cross-sectional view of the camera unit 1020.

As shown in Figs. 24 to 29, the lower base 1100 and the upper cover 1150 are each made of a resin molded article, and the plane has a substantially rectangular shape. The lower base 1100 has a shallow box-shaped bottom formed by standing the circumferential wall 1102 at a constant height at the edge of the bottom wall 1101, and has a circular opening 1110 for exposure at the center of the bottom wall 1101. Is formed.

In addition, a bottom surface of the bottom wall 1101 is capable of fixing the CCD-attached circuit board 30 on which the CD (photographing element) 32 is mounted on the substrate body 31. That is, the lower surface of the bottom wall 1101 is formed with a substrate attachment cylinder portion 1103 capable of fixing the circuit board 30 in a state in which the CD 32 is aligned directly under the opening 1110 for exposure. The circuit board 30 is in close contact with the lower end surface of the substrate attaching cylinder 1103 in a state where the CD 32 mounted on the surface is accommodated in the CD receiving recess 1103a inside the substrate attaching cylinder 1103. The two screws 14 can be fixed.

The boss portion formed convexly protruding toward the outer circumferential side of the substrate attaching cylinder portion 1103 is provided with a screwing hole 1105 for this purpose, and the screw 14 is formed in the substrate body 31 of the CAD circuit board 30. The screw insertion hole 35 for passing the through is formed.

The substrate body 31 has a quadrangular shape corresponding to the lower base 1100, and has two corner portions for screwing to be fixed to the attaching member in the state assembled as the camera unit 1020. The attachment hole 36 is formed. Moreover, although the CD32 is mounted as the imaging element in the center of the upper surface of the board | substrate main body 31, you may of course mount other imaging elements.

The filter assembly 1210 and the actuator 1300 are mounted on the upper surface of the lower base 1100. In this case, the filter assembly 1210 is a type of switching the optical filters 220A and 220B that slide linearly by the operation of the linear actuator 1300 and are inserted into and removed from the opening 1110 for exposure. In the direction parallel to the longitudinal direction of the base 1100, the slide direction A (the arrow A direction in FIG. 28) of the filter assembly 1210 is set.

The center region on the lower base 1100 is secured as a region in which the filter assembly 1210 slides, and an opening 1110 for exposure is formed in the center of the region. Moreover, the space as the actuator accommodating part 1120 is secured to the side of the area | region which the filter assembly 1210 slides. The actuator accommodating part 1120 is a rectangular space of a planar shape elongated in the direction parallel to the said slide direction A, and is lower than the base wall 1101 of the area | region which the filter assembly 1210 slides, and both sides Is composed of an outer side wall 1120a and an inner side wall 1120b, and the rear end and the front end are constituted by the rear end wall 1121 and the front end wall 1122. The rear end wall 1121 is formed as part of the circumferential wall 1102, and the front end wall 1122 is formed as a wall separated inside the circumferential wall 1102. A slide groove 1123 is formed near the front of the shear wall 1122 formed as the boundary wall, and a positioning boss 1107 which serves as a spring stopper pin is formed at the tip thereof.

Moreover, the outer side wall 1120a which comprises the actuator accommodating part 1120 is also formed as a part of the circumferential wall 1102, and the rectangular cut part 1128 is formed in the side wall 1120a. This cut part 1128 is for exposing the small circuit board 105 mentioned later to the exterior. Moreover, the inner side wall 1120b is provided as a boundary wall for dividing the accommodation space of the filter assembly 1210 and the actuator accommodating part 1120, and is the edge of the inner side wall 1120b and the rear end wall 1121. In between, the slit 1144 which inserts the actuator base 1242 mentioned later from the top is formed.

Moreover, the actuator base attachment wall 1142 continuous with the inner side wall 1120b is formed in the outer side of the slit 1144. As shown in FIG. This actuator base attachment wall 1142 is also formed as part of the circumferential wall 1102 of the lower base 1100, and a screw hole 1143 for screwing the actuator base 1142 is formed at the lower end thereof. have.

In addition, on the upper surface of the lower base 1100, three guides for guiding the linear slide of the filter assembly 1210, in addition to the screwing hole 1104 or the positioning boss 1107 for attaching and fixing the upper cover 1150. The convex shaft 1111 which supports the pin 1115 and the rotating lever 1280 mentioned later is rotated and formed.

The three guide pins 1115 are arranged at positions of three vertices of an imaginary rectangle in which a pair of opposing sides are parallel to the slide direction A and four vertices surround the opening 1110 for exposure. . In addition, the convex shaft 1111 is arrange | positioned in the extended position of the area which the filter assembly 1210 slides in the position which deviates from the area which the filter assembly 1210 slides.

This convex shaft 1111 also serves as a positioning boss (another positioning boss is indicated by reference numeral 1107), and the upper cover (even in a position substantially opposed to the convex shaft 1111 with the filter assembly 1210 interposed therebetween). A positioning boss 1107 for determining the position of the 1150 is formed upright. In addition, three or more screwing holes 1104 for screwing the upper cover 1150 are disposed at appropriate intervals, and form protrusions on the inner surface side of the circumferential wall 1102 of the lower base 1100 and thereon. Formed.

On the other hand, the upper cover 1150 which covers the upper side of the lower base 1100 is the opening part for exposure of the lower base 1100 in the center of the substantially rectangular top plate 1151 as shown to FIG. 24, FIG. A lens mounting hole 1160 corresponding to 1110 is provided, and a nut portion 1161 is formed on the inner circumference of the lens mounting hole 1160 to which the bolt portion 41 of the lens 40 is screwed. . The upper cover 1150 is fixed to the lower base 1100 with a screw 12 in a state covering the upper surface of the lower base 1100, and corresponds to the screwing hole 1104 of the lower base 1100. The screw insertion hole 1154 and the positioning hole 1157 or the support hole 1171 into which the upper end of the positioning boss 1107 and the convex shaft 1111 are inserted are provided. At the lower end of the lens mounting hole 1160 of the upper cover 1150, a stopper 1162 for restricting the fitting height of the lens 40 is formed.

The lens 40 attached to the lens mounting hole 1160 is configured as an integrally molded article made of transparent resin, and is slightly smaller than the opening 1110 of the lower base 1100 in the center as shown in FIGS. 24 and 33. A circular lens portion 40A having a large diameter is provided, a ring-shaped edge portion 42 is provided around it, and a bolt portion 41 is provided on the lower periphery of the ring-shaped edge portion 42. . Thus, by forming the bolt portion 41 screwed to the nut portion 1161 of the upper cover 1150 directly on the lens 40, the lens 40 to the filter switching unit 1010 without using an unnecessary barrel. I can attach it. That is, the filter switching unit 1010 serves as a lens mount.

The filter switching unit 1010 according to the present embodiment is a case in which the filter switching mechanism unit 1200 is assembled to the lower base 1100 and the upper cover 1150 is fixed thereon to fix the filter switching mechanism unit 1200. It demonstrates.

As shown in FIGS. 24, 28, 29, and 30, the filter switching mechanism 1200 is accommodated in a space between the lower base 1100 and the upper cover 1150 (not shown in the drawing). And a filter assembly 1210 and an actuator 1300 for driving the filter assembly 1210. The filter assembly 1210 enters the CD32 32, which is an imaging device, through the lens 40 mounted in the lens mounting hole 1160 of the upper cover 1150 and the opening 1110 for exposure of the lower base 1100. It corresponds to the movable member which switches the conditions of exposure to make.

The filter assembly 1210 is configured by attaching two optical filters 220A and 220B to and from the plate-shaped filter body 1210A, which are inserted and removed with respect to the position on the opening 1110 for exposure of the lower base 1100. By linearly sliding the filter body 1210A by 1300, the optical filters 220A and 220B can be inserted into and removed from the position on the opening 1110.

The filter body 1210A has a substantially rectangular plank shape, and includes two circular transmission holes 1213A and 1213B corresponding to the opening 1110 for exposure side by side in the slide direction, and the transmission hole ( Three slide grooves 1215 are positioned on both sides of the 1213A and 1213B and inserted into the slide pin 1115 of the lower base 1100. Two rectangular optical filters 220A, 220B are disposed above the transmission holes 1213A, 1213B, and the two optical filters 220A, 220B have a plurality of claws formed in the filter body 1210A. 1216 and the like, the band spring-shaped pressure plate 1230 covering the edges of both filters 220A and 220B is covered from above, and both ends of the pressure plate 1230 are placed on the filter body 1210A. By inserting into the engagement claw 1217, it is positioned and fixed at a predetermined position on the filter body 1210.

Moreover, the long hole 1211 for engaging the drive pin 1284 of the rotation lever 1280 mentioned later is formed in the edge part of the slide direction A of the filter body 1210A.

Next, the actuator 1300 which slides the filter assembly 1210 is demonstrated.

The actuator 1300 is a linear motion type that linearly moves the movable rod 1270, and includes an actuator base (fixing part of the actuator) 1242, a coil bobbin 1241 fixed to the actuator base 1242, and It consists of two coils 1290 wound in series and coil windings in coil bobbin 1241, plate-shaped yoke 1291 for magnetic reinforcement disposed on both sides of coil bobbin 1241, and movable rod 1270. It is accommodated in the actuator accommodating portion 1120 to match its driving direction in parallel with the slide direction (A) of the filter assembly 1210.

The coil 1290 is wound around two recesses formed between three boundaries 1241a, 1241b, and 1241c of the coil bobbin 1241 as shown in FIG. 30 (b). Further, at one end of the actuator base 1242, a screw hole 1243 for fixing the screw 18 to the actuator base attachment wall 1142 on the lower base 1100 side is formed. On the outside of one yoke 1291, a small circuit board 1050 for electrically connecting the coil 1290 and an external lead wire is disposed.

As for the movable rod 1270 of the actuator 1300, the magnet holder part 1271 to which the cylindrical magnet 1273 is inserted and fixed is formed in the base end part, and the rod 1272 which extends straight to the front end side is provided. It is integrated. At the tip of the rod 1272, a downwardly directed protrusion 1274 is formed to slide to the sliding guide 1123 of the lower base 1100. At the same time, an arm 1275 that is bent at right angles in the horizontal direction is formed. The driving pin 1276 is formed upward at the tip of the arm 1275.

The inside of the coil bobbin 1241 is hollow, and the magnet holder part 1271 of the movable rod 1270 slides in and slides here, and the actuator 1300 is comprised by this. In this case, the magnet 1273 is bipolarly magnetized in the longitudinal direction, and when energized by the coil 1290, the magnet is attracted / repelled to generate a driving force.

In the case of constituting the filter switching unit 1010, first, the filter assembly 1210 is assembled to the lower base 1100. That is, the three guide grooves 1215 of the filter body 1210A are inserted into the three guide pins 1115. Accordingly, the filter assembly 1210 can slide in the direction of the arrow A by the action of the guide pin 1115 and the guide groove 1215. Next, the actuator 1300 is accommodated in the actuator accommodating portion 1120, and one end of the actuator base 1242 is pulled out of the slit 1144 to the actuator base attaching wall 1142 of the lower base 1100. To be fixed. Accordingly, the actuator 1300 is fixed, and in this state, the small circuit board 1050 abuts out from the cutout portion 1128 of the lower base 1100.

In addition, the projection (1274) toward the lower end of the movable rod 1270 is fitted into the slide groove (1123) of the lower base (1100). The arm 1275 is then shaped to protrude to the side to which the filter assembly 1210 is attached. Subsequently, a bearing hole 1282 formed in the middle portion of the longitudinal direction of the lever arm 1281 of the rotation lever 1280 for turning is inserted into the convex shaft 1111 of the lower base 1100. Thereby, the rotation lever 1280 can rotate by making the convex shaft 1111 and the bearing hole 1282 into a rotation point.

Here, the long hole 1283 formed at one end of the lever arm 1281 of the rotary lever 1280 is coupled to the upwardly directed drive pin 1276 formed at the tip of the arm 1275 of the movable rod 1270. In addition, the downwardly directed drive pin 1284 formed at the other end of the lever arm 1281 is coupled to the long hole 1211 formed at the tip of the filter body 1210A of the filter assembly 1210. In this way, the movable rod 1270 and the filter assembly 1210 of the actuator 1300 are connected to each other via a rotation lever 1280 having a rotation point in the middle of its longitudinal direction.

In addition, one end 1288a of the twisted spring 1288 is coupled to the positioning boss 1107 which also serves as the spring stop pin of the lower base 1100, and the other end 1288b is connected to the long end of the rotary lever 1270. Engages with the hook 1285 formed in the vicinity of the hole 1283.

Accordingly, the filter assembly 1210 is made to slide according to the linear movement of the movable rod 1270, and the filter assembly 1210 is pressed by either of the moving ends by the action of the spring 1288. Will be. In this case, by appropriately distributing the arm length from the rotation point of the rotation lever 1280, the moment balance between the movable rod 1270 and the filter assembly 1210 can be adjusted to achieve smooth operation.

In this way, after assembling the filter switching mechanism 1200 on the lower base 1100, the upper cover 1150 is put thereon, and the positioning hole 1157 or the support hole 1171 is mounted on the lower base 1100. It is fitted to the positioning boss 1107 or the convex shaft 1111. The upper cover 1150 is fixed to the lower base 1100 with screws 12. In this way, this filter switching unit 1010 is completed.

Herein, the lens 40 is mounted in the lens mounting hole 1160 of the upper cover 1150 of the filter switching unit 1010, and the CD-attached circuit board 30 is screwed to the lower surface of the lower base 1100. 14). By doing so, the camera unit 1020 shown in Figs. 31 to 33 is completed.

In this filter switching unit 1010, when the coil 1290 is energized, the movable rod 1270 moves linearly, and the rotation lever 1280 rotates, so that the filter assembly 1210 slides and two filters are carried out. One or the other of 220A, 220B is positioned on the opening 1110 for exposure. Light passing through the filters 220A and 220B is incident on the CD 32.

In this operation, when the magnet 1273 is biased to one side, most of it is in one coil 1290, but a part remains in the other coil 1290. Therefore, when the current flowing to the side where the majority of the magnet 1273 is located generates a magnetic field that repels, the counterpart generates a magnetic field that attracts, so when it moves there, it stops at that position. have. When no current flows through the coil 1290, the magnet 1290 does not move to either side but moves to either side by the force of the spring 1288.

The effect is next.

The filter switching unit 1010 described above forms a lens mounting hole 1160 in the upper cover 1150 constituting the unit, and the bolt portion 41 of the lens 40 on the inner circumference of the lens mounting hole 1160. ) And a nut portion 1161 to be screwed together, the lens 40 can be directly attached to the upper cover 1150 by screwing. That is, when attaching the lens 40 to the unit 1010, the barrel having a length in the optical axis direction can be omitted. Therefore, in the case where the camera unit 1020 is constructed by assembling the CD attached circuit board 30 and the lens 40 to the unit 1010, the optical axis dimension of the camera unit 1020 can be shortened. The thickness of the camera unit 1020 can be reduced.

In addition, since the conditions of exposure incident on the CD 32 are switched by the insertion and withdrawal of the optical filters 220A and 220B, an image utilizing the filter effect can be recorded. In addition, since the filter assembly 1210 is planar, it can contribute to the thinning of the camera unit 1020.

In addition, in the filter switching unit 1010 of the present embodiment, the filter assembly 1210 is installed so as to slide linearly, and the linear actuator 1300 is disposed in parallel with the slide direction of the filter assembly 1210. The rotary lever 1280 having the movable rod 1270 and the filter body 1210A of the actuator 1300 having a rotation point (a bearing hole 1282 and a convex shaft 1111) in the middle of its longitudinal direction. Since it is connected via, the compact arrangement | positioning of the filter switching mechanism part 1200 can be implement | achieved, and it can contribute to the miniaturization of the filter switching unit 1010.

Moreover, since the yoke 1291 is provided in both sides of the coil 1290, it can contribute to the improvement of the drive efficiency of the actuator 1300, and the coil 1290 and the external lead wire are electrically connected to the outer side of one yoke 1291. Since the small circuit board 1050 to be connected is disposed and the circuit board 1050 is exposed from the cutout portion 1128 provided on the side surface of the lower base 1100, the connection of the external lead wire can be simplified.

Further, in the first and second embodiments, nuts (nut parts 161 and 1161) are formed on the inner circumferences of the lens mounting holes 160 and 1160 of the upper covers 150 and 1150 as screws. Although the case where the bolt part 41 is formed in the lens 40 side was demonstrated, on the contrary, the nut part was formed in the lens 40 side, and the bolt part was formed in the upper cover 150, 1150 side, and both were screwed. May be combined. In that case, the cylindrical part may be formed around the lens mounting holes 160 and 1160 of the upper cover 150 and 1150, for example, and a bolt may be formed in the outer periphery of the cylindrical part.

1 is an exploded perspective view of the first embodiment of the present invention.

Fig. 2 (a) is a plan view of the lower base, and (b) is a sectional view seen from the I-VI arrow direction in (a).

3 is a perspective view from below of the lower base;

4 is a perspective view of the lower surface side of the upper cover.

5 is a perspective view of the filter switching mechanism unit assembled to the lower base;

Fig. 6 (a) is a plan view of a filter switching mechanism unit assembled to a lower base, and (b) is a sectional view seen from the arrow-VII arrow of (a).

FIG. 7 is a sectional view seen from the arrow of the II-VI arrow of FIG. 6 (a). FIG.

8 is a perspective view of the entire assembly (camera unit).

9 is a perspective view from below of the entire assembly (camera unit).

Fig. 10 is a sectional view of the entire assembly (camera unit).

11 is a perspective view of the filter switching mechanism portion.

12 is an exploded perspective view of the filter assembly.

Fig. 13 is an exploded perspective view of the coil body, the rotary lever, and the air core coil constituting the actuator.

14 is an exploded perspective view of the coil body.

Fig. 15 is a configuration diagram of the coil body, (a) is a plan view, (b) is a rear view, (c) is a left side view of (b), (d) is a right side view of (b), and (e) is a bottom view (F) is a front view.

16 is an exploded perspective view of the rotary lever.

Fig. 17 is a plan view of the rotation lever, (b) is a side view, and (c) is a rear view.

Fig. 18 is a perspective view showing a state before assembling the air core coil to the coil body constituting the actuator and the rotary lever.

Fig. 19 is a perspective view seen from the back side of an actuator constructed by combining a coil body, a rotary lever, and an air core coil.

20 is a rear view of the actuator.

Fig. 21 is a horizontal sectional view of the actuator.

Fig. 22 is a perspective view showing a state when the filter switching mechanism portion is rotated to one side.

Fig. 23 is a perspective view showing a state when the filter switching mechanism portion is rotated to the other side.

24 is an exploded perspective view of the second embodiment of the present invention.

25 is a perspective view of the lower base.

Figure 26 is a perspective view from below of the lower base.

Figure 27 is a perspective view from below of the top cover.

Fig. 28 is a perspective view of the filter switching mechanism unit assembled to the lower base;

Fig. 29 is a plan view of the filter switching mechanism assembled to the lower base;

(A) is sectional drawing seen from the arrow-head arrow direction of FIG. 29, (b) is sectional drawing seen from the arrow-head arrow direction of FIG.

Fig. 31 is a perspective view of the entire assembly (camera unit).

32 is a perspective view from below of the entire assembly (camera unit).

33 is a sectional view of the entire assembly (camera unit).

* Description of the symbols for the main parts of the drawings *

10 Filter switching unit (exposure condition switching unit)

20 Camera Unit

30 CD attached circuit board

32 CD (photographic elements)

40 lenses

41 bolts

100 lower base

101 bottom wall

110 Opening for exposure

111 Convex Shaft (Rotation Point)

150 top cover

160 Lens Mounting Hole

161 Nut section

210 filter assembly (movable member)

210A filter sieve

211 Rotation Hole (Rotation Point)

219 balance weight

220A, 220B Optical Filter

240 coil

243 tops

244 Bottom

243a, 244a bearing holes (concave, turn point)

270 rotary lever

272 magnets

275 magnet holder

290 air core coil

281 Convex Shaft (Convex)

300 actuator

1010 Filter changeover unit (exposure condition changeover unit)

1020 camera unit

1050 miniature circuit boards

1100 lower base

1101 base wall

1110 opening for exposure

1111 convex axis (rotation point)

1128 cutout

1150 top cover

1160 Lens Mounting Hole

1161 nut part

1210 filter assembly (movable member)

1210A filter sieve

1242 actuator base (fixing part of the actuator)

1270 movable rod (movable part of actuator)

1273 magnet

1280 rotary lever

1282 bearing hole (turn point)

1290 coil

1291 York

1300 actuator

Claims (13)

A circuit in which the imaging element is mounted on the bottom surface of the bottom wall in a state in which an opening for exposure is provided on the bottom wall, and the imaging element is aligned in the opening. A lower base to which the substrate is fixed, In addition to providing a lens mounting hole corresponding to the opening of the bottom wall, and a screw portion for screwing the screw portion of the lens to the inner circumference or periphery of the lens mounting hole, and covering the upper surface of the lower base An upper cover fixed to the lower base, A movable member which is accommodated to move in a space between the lower base and the upper cover, and which switches a condition of exposure incident on the photographing element through a lens mounted in a lens mounting hole of the upper cover and an opening of the lower base; Wow, Actuator embedded in the space between the lower base and the upper cover for driving the movable member An exposure condition switching unit comprising: The method according to claim 1, And the nut is formed on the inner circumference of the mounting hole of the upper cover as the threaded portion on the lens side is a bolt and the threaded portion on the upper cover side. The method according to claim 1 or 2, The movable member is formed of a filter assembly configured by attaching an optical filter inserted into and removed from a position on an opening of the lower base to a plate-shaped filter body, And the actuator moves the filter body into and out of the optical filter with respect to the position on the opening. The method of claim 3, The plank-shaped filter body is rotated in a plane along the bottom wall of the lower base by being attached to a rotation point set to be located near the center on the plate surface of the filter body while being away from the opening. Is installed And a plurality of the optical filters are arranged side by side at a position corresponding to the opening when the filter body is rotated and oriented to one side with respect to the rotation point. The method of claim 4, wherein Balance side for adjusting the weight balance with respect to the said rotation point on the one end side and the other end side of the said filter assembly to the other end side on the filter body on the opposite side, when the side by which the said some optical filter is arrange | positioned is made into the one end side. weight) is provided. The method of claim 5, The actuator has a rotary lever which rotates in a plane along the bottom wall of the lower base about a rotation point, A rotation point of the filter element and a rotation point of the rotation lever are disposed at opposing positions with the opening interposed therebetween, In the middle of the rotation point of the filter body and the rotation point of the rotary lever, the rotary lever and the filter body are coupled so that the filter body rotates by the rotation of the rotary lever, And both rotation points of the filter element and the rotation lever are arranged in a diagonal direction of the lower base and the upper cover, the plane of which has a substantially rectangular shape. The method of claim 6, The actuator, Coil body, A rotating lever assembled to rotate on the coil body and accommodating a magnet in a magnet holder portion located in the coil body; An air core coil mounted on the coil body and generating a driving force between the magnet by a magnetic force generated by energization to rotate the rotary lever. Done, In the coil body and the magnet holder portion of the rotary lever, the rotation point of the rotary lever is configured by combining the convex portion provided on one side and the recess portion provided on the other side, The rotation point is arrange | positioned near the center of the projection surface of a magnet when it sees from the rotation axis direction of a rotation lever, The exposure condition switching unit characterized by the above-mentioned. The method of claim 7, wherein The coil body includes an upper plate and a lower plate positioned above and below the magnet holder portion of the rotation lever, In the magnet holder portion and the coil body of the rotation lever, the convex portions and the concave portions provided on one side and the other are joined using at least one warp of the upper plate and the lower plate, Thereafter, the air core coil is mounted on the outer side of the upper plate and the lower plate, thereby limiting the warp to the outer side of the upper plate and the lower plate, whereby the rotation lever does not come out of the coil body. The method of claim 3, The board-shaped filter body is provided on the opening so as to slide linearly along the bottom wall of the lower base, The optical filter is arranged in plural in parallel in the slide direction of the filter body, On the side of the part provided so that the said filter body can slide, the said actuator of linear motion type is arrange | positioned toward its drive direction parallel to the slide direction of the said filter body, The movable part of the actuator and the filter body are connected to each other by rotary levers each having a rotation point in the middle of its longitudinal direction and coupled to the movable part of the actuator and the filter body, respectively. And the filter body is configured to linearly slide by a linear motion of the movable portion of the actuator. The method of claim 9, A coil for generating a magnetic force by energization is provided in the fixed part of the actuator, and a magnet for linearly moving by generating a driving force with the fixed part according to the magnetic force of the coil is installed in the movable part of the actuator. Yokes for strengthening the magnetic force of the coils are provided at both sides of the coil, and small circuit boards for electrically connecting the coil and the external lead wires are disposed outside one yoke. The small circuit board is exposed to the outside from a cutout formed on the side surface of the lower base. The method according to claim 1 or 2, And the movable member comprises a shutter member for opening and closing the opening of the lower base. The method according to claim 1 or 2, And the movable member is a diaphragm member for adjusting the opening degree of the opening of the lower base. A circuit board on which the photographing element is mounted is fixed to a lower surface of the lower base of the exposure condition switching unit according to any one of claims 1 to 12, and a lens is mounted on the upper cover of the exposure condition switching unit to integrate the lens. Camera unit, characterized in that.

Images