JP2003222946A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera having a merit that the thinning and the compaction of a camera main body equipped with a photographic lens unit and an optical finder unit having a reflecting optical system with a zoom function respectively are realized. <P>SOLUTION: The camera is equipped with the photographic lens unit 100 having a photographic optical system 105 including the reflecting optical system 1PX for optically reflecting incident light and a zoom lens for photography 122 provided to move in the direction of an optical axis 012, and the optical finder unit 200 having a finder optical system 205 including the reflecting optical system 2PX for optically reflecting the incident light and a zoom lens for observation 222 provided to move in the direction of the optical axis 012. A reflecting front optical system 2PA and a reflecting rear optical system 2PB in the optical system 2PX are arranged to correspond to a reflecting front optical system 1PA and a reflecting rear optical system 1PB in the optical system 1PX so as to be respectively adjacent to them. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a taking lens unit and an optical finder unit, each of which has a folding optical system and a zoom lens.

[0002]

2. Description of the Related Art Generally, cameras, especially electronic cameras, are desired to be thin. In order to realize this reduction in thickness, it has recently been proposed to mount a so-called optical axis bending type photographing optical system (see Patent Document 1). This optical axis bending type photographing optical system is provided with a reflecting surface inside the photographing optical system, and by bending the photographing optical axis with this reflecting surface, the direction of the optical axis after reflection becomes the camera width direction. The length of the camera in the thickness direction is shortened.

On the other hand, a camera requires a viewfinder. This finder is for observing a subject image to be photographed, and an optical finder is generally used.
An electronic camera is generally provided with an LCD (liquid crystal display device) so that a subject image can be observed. However, from the viewpoint of power saving, in many cases, the optical viewfinder is used at the time of photographing and the LCD is used for observation only at the time of reproduction.

On the other hand, the camera also needs a so-called zoom function. This zoom function is a function of continuously changing the focal length, and is generally performed by moving the zoom lens in the optical axis direction. When the taking optical system has a zoom function, the corresponding optical viewfinder also needs the zoom function.

[0005]

[Patent Document 1] JP-A-11-196303

[0006]

The thickness of the taking lens unit can be reduced by mounting the taking optical system of the optical axis bending type. However, even if a bending angle and optical axis bending type shooting optical system is installed, depending on how it is combined with the optical viewfinder, the camera body cannot be stored in an appropriate manner, and as a result, the camera body is made thinner or smaller. May be difficult.

Further, in a camera having a zoom function, both the taking lens unit and the optical finder unit are large in size. In addition, interlocking means must be provided so that the zooming operations of both units can be interlocked.

As described above, in a camera equipped with a taking lens unit and an optical finder unit each having a bending optical system and a zoom lens, it may not be possible to make the final camera compact and thin.

The present invention has been made under such circumstances, and an object thereof is to provide a camera having the following advantages.

(A) Even if the photographic lens unit and the optical finder unit each having a folding optical system with a zoom function are provided, the camera body can be made thin and compact.

(B) The structure is simple and can be easily manufactured.

[0012]

In order to solve the above problems and achieve the object, the camera of the present invention has the following characteristic construction. In addition, characteristic configurations other than the following will be clarified in the embodiments.

The camera of the present invention is provided with a photographic lens unit having a bending optical system for optically bending incident light and a photographic optical system including a photographic zoom lens movably provided in the optical axis direction. A bending optical system for optically bending light, and an optical finder unit having a finder optical system including an observation zoom lens movably provided in the optical axis direction, and before bending in the bending optical system of the photographing lens unit. The pre-bending optical system and the post-bending optical system in the folding optical system of the optical finder unit are arranged so as to be adjacent to the optical system and the post-bending optical system, respectively.

In the above camera, the pre-bending optical systems and the post-bending optical systems of the taking lens unit and the optical finder unit are arranged so as to be adjacent to each other. Therefore, no wasted space is generated when the two units are assembled, and the unit can be thin and compact as a whole. Thus, it contributes to downsizing of a camera provided with the bending optical system and the zoom lens.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION (One Embodiment) As shown in FIG. 1, a photographing lens unit 10 having a photographing optical system 105 having an incident optical axis of 011 is provided inside an electronic camera body 1.
0 and the optical finder unit 200 having the finder optical system 205 are accommodated in a state where there is a slight gap between them and are integrally coupled. As shown, the taking lens unit 100 and the optical finder unit 200 are arranged on the right side of the camera body 1 when viewed from the front of the camera.

As shown in FIGS. 2 and 3, the taking lens unit 100 has a zoom mechanism B integrally mounted on a main mechanism A. The main mechanism A is
Optical axis bending mechanism 110 and this optical axis bending mechanism 11
It has a lens barrel 120 in which the light incident end side is connected to 0.

As shown in FIGS. 4A and 4B, and FIG. 5, the optical axis bending mechanism 110 has a taking lens 111 and a prism 112 held by a holding member 113. The opening end of the holding member 113 on the light output side is connected to the lens barrel 120. Thus, the bending optical system 1PX by the optical axis bending mechanism 110 constitutes a part of the photographing optical system 105. In other words, the photographing optical system 10
Reference numeral 5 includes the bending optical system 1PX.

The bending optical system 1PX described above makes the light incident from the subject along the first optical axis (incident optical axis) 011:
The prism 112 serving as a reflecting member reflects the light along a second optical axis 012 that is substantially perpendicular to the first optical axis 011. The folding optical system along the first optical axis 011 will be referred to as a pre-bending optical system 1PA, and the folding optical system along the second optical axis 012 will be referred to as a post-bending optical system 1PB.

Inside the lens barrel 120, a first group lens 121, a second group lens 122 (shooting zoom lens), and 3 are provided so that a subject image can be formed on the basis of light incident from a light incident end. A photographic lens group including a group lens 123 (focusing lens) is housed. The subject image formed by these photographing lens groups (lens groups 121 to 123 of the first group) is photoelectrically converted by the image pickup device 126 arranged at the end of the optical axis of the lens barrel 120. The input / output terminal row 173 (17
3a, 173b) are attached. The image pickup device 12
On the optical axis 012 in front of the light receiving surface of 6, the optical member 1 including the fourth lens group 124 and the low-pass filter 125 is provided.
30 are arranged.

In this way, the photographing lens group (first group lens 1
21 to 3 group lens 123), optical member 130 (4 group lens 124, low-pass filter 125), image sensor 12
6 and the like are all arranged in the post-bending optical system 1PB formed along the second optical axis 012.

The photographing optical system 105 of this embodiment has the above-mentioned bending optical system 1PX and constitutes a digital camera optical system having an image pickup device 126 at the end of the second optical axis 012.

The first lens group 121 to the third lens group 123
Are respectively held by the respective group lens holding frames 131 to 133. The optical member 130 including the fourth group lens 124 and the low pass filter 125 is held by a holding frame 134. Among these holding frames, the second group lens holding frame 132 and the third group lens holding frame 133 are guided by the pair of guide shafts 171 and 172 (see FIGS. 2 and 3) to move in the direction along the optical axis 012. It is movably installed. A shutter unit 160 is mounted on the front surface of the second group lens holding frame 132. Further, on the rear surface of the third group lens holding frame 133, an AF as a drive source for driving the third group lens holding frame 133, that is, an actuator, is used.
(Autofocus) Motor 140 is mounted.

A flexible printed circuit board 150 (151, 152) for supplying electric power to the drive system of the AF motor 140 and the shutter unit 160 is introduced from the outside of the lens barrel 120 to the inside of the lens barrel 120. ing. This flexible printed circuit board 150 (15
1, 152) is in the form of a strip that can be bent in the thickness direction. The tip portions of the flexible printed boards 151 and 152 introduced into the lens barrel 120 are bent in a U shape in the same direction at substantially the same portions, and then the second group lens holding frame 132 and the third group lens holding frame. It is fixed to each 133. The tip 151a of the printed board 151
Are electrically connected to a drive mechanism (not shown) of the shutter unit 160, and the tip end 152 of the printed circuit board 152.
a is electrically connected to the AF motor 140.

As shown in FIGS. 4A and 4B, the outer surface of one side (upper side in the figure) of the holding frame 134 holding the optical member 130 (fourth group lens 124, low-pass filter 125). And an inner surface of the lens barrel 120, a space SA1 capable of accommodating the AF motor 140 is formed. Further, between the outer surface on the other side (lower side in the figure) of the holding frame 134 and the inner surface of the lens barrel 120, flexible portions 151b and 152b generated by bending the flexible printed circuit boards 151 and 152 can be accommodated. A second space SA2 is formed. The flexible printed boards 151 and 152 are accommodated in such a manner that the bending portions 151b and 152b caused by bending overlap with the second space SA2.

The first space SA1 and the second space S
A2 is the first optical axis 011 and the second optical axis 012
A first region E1 existing on one side (upper side in the drawing) and a second region E2 existing on the other side (lower side in the drawing) are respectively formed with a plane including and as a boundary.

The regulating member 1 is provided on a part of the lens holding frame 133.
55 is provided. The restricting member 155 is a member for restricting the variation range of the bending portions 151b and 152b of the flexible printed circuit boards 151 and 152 in accordance with the movement of the lens holding frame 133.

Returning to FIG. The zoom mechanism B is separately provided as a unit that can be detachably coupled to the main mechanism A. The zoom mechanism B includes a first zoom lens moving mechanism (180 to 184, 191) and a finder drive mechanism (192, 193, etc.).

The first zoom lens moving mechanism (180
184, 191) are a zoom motor 180 as a drive source, that is, an actuator mounted on the mounting frame 181, a lead screw 182 rotated by the power of the zoom motor 180, and an optical axis driven by the lead screw 182. 012 slides along a guide shaft 183 provided in parallel to the zoom lens 12
And a drive member 191 for driving and operating the drive unit 2.

The finder drive mechanism (192, 193, etc.) is provided with a sliding member 19 provided so as to slide along the guide shaft 183 as the driving member 191 moves.
2 and a drive pin 193 as a drive force transmitter projectingly provided on the sliding member 192. Sliding member 1
Reference numeral 92 is connected to the second lens group holding frame 132 via a spring 184 as described later. The finder drive mechanism (192, 193, etc.) will be described later in detail.

The driving member 191 and the sliding member 192
And the drive pin 193, the displacement transmitting slider 190
Are configured.

The zoom mechanism B is integrated with the main mechanism A by being screwed into the screw holes 127a and 127b of the main mechanism A through the mounting holes 185a and 185b provided in the mounting frame 181.

The back cover C is integrated with the main mechanism A by screwing the mounting screw 128a into the screw hole 127c of the main mechanism A through a mounting hole 128b provided in the plate member 128.

When the zoom mechanism B is integrated with the main mechanism A, the zoom motor 180 is arranged in the first area E1 together with the AF motor 140. The zoom motor 180 is located outside the front portion of the lens barrel 120 and in the first area E.
It is arranged close to the prism 112 existing inside 1. Between the AF motor 140 and the zoom motor 180, at least one lens of the photographing lens group (first group lens 121 to third group lens 123) is arranged.

FIGS. 6A and 6B show a viewfinder drive mechanism (19) of the taking lens unit 100 according to this embodiment.
2 and 193) together with the drive member 191, FIG. 6A is a side view of a main part, and FIG. 6B is a view taken along line 6b-6b of FIG. 6A. FIG.

Finder drive mechanism (192, 193)
Is the first zoom lens moving mechanism (180-18
A mechanism for moving the zoom lens 222 of the finder optical system 205 by interlocking a second zoom lens moving mechanism (240, 250, 270) described later with the movement of the zoom lens 122 of the photographing optical system 105 according to 4, 191). Is.

As shown in FIGS. 6 (a) and 6 (b), the sliding member 192 has two cylindrical leg portions 192a and 192c at the edge of one of the L-shaped members. ing. The two leg portions 192a and 192c are provided so as to be separated from each other by a predetermined distance, and are fitted into the guide shaft 183 in such a manner that both ends of the cylindrical leg portion 191a of the driving member 191 are sandwiched from both sides. ing. The leg portions 192a and 192c are slidable with respect to the guide shaft 183 in the axial direction and rotatable in the axial direction. The sliding member 192 has an opening 192b serving as a rotation range restricting mechanism substantially at the center of the other part of the L-shaped member.
have. The opening 192b is fitted to the protrusion 191b formed on the upper portion of the driving member 191, with a predetermined "play".

Thus, the drive pin 193 as a drive force transmitter projectingly provided on the sliding member 192 has the optical axis 01.
It is displaceable as shown by arrows M and N within a predetermined angle range with respect to a specific direction (direction orthogonal to the optical axis) other than the two directions.

A protrusion 192d is provided below the sliding member 192. A tension spring 184 as a biasing member is stretched between the projecting piece 192d and the projecting piece 132a provided on the second group lens holding frame 132. Thus, the sliding member 192 is the tension spring 1
Due to the urging force of 84, the drive member 1 is
It is connected in a state of being pressed against 91.

Therefore, the sliding member 192 is kept rotatable about the guide shaft by an angle corresponding to the "play", while being linked with the movement of the driving member 191 along the guide shaft 183. It is movable in the optical axis 012 direction.

FIG. 7 is a view showing a correspondence relationship between the taking lens unit 100 and the optical finder unit 200 according to the present embodiment, and is a perspective view showing the taking lens unit 100 and the optical finder unit 200 separately. FIG. 8 is a schematic plan view showing a schematic configuration of the finder optical system 205.

As shown in FIGS. 7 and 8, the taking lens unit 100 has a taking optical system 105 including a folding optical system 1PX inside a case 101. In the case 101, the dimension L11 in the direction parallel to the optical axis of the pre-folding optical system 1PA in the folding optical system 1PX, that is, the incident optical axis 011 (this optical axis matches the thickness direction of the camera body 1), The dimension is set to be shorter than the dimension L12 in the direction parallel to the optical axis 012 of the post-bending optical system 1PB (this optical axis coincides with the width direction of the camera body 1) in a direction perpendicular to the incident optical axis 011. It has an outer shape (substantially rectangular parallelepiped shape).

Further, the optical finder unit 200 has a finder optical system 205 including a bending optical system 2PX inside the case 201.

The optical axis of the finder optical system 205 is composed of an incident optical axis 021 of the pre-bending optical system 2PA in the lens group 206 and a post-bending optical axis 022 including two reflections in the post-bending optical system 2PB. The incident subject light flux passes through the lens group 206 and is first bent by the reflecting surface. The bent light beam is further reflected twice as shown in FIG. 8 by the action of a lens or a prism (not shown) that specifically configures the optical system 2PB after being bent, and then enters the photographer's pupil.

The case 201 has a dimension L21 parallel to the incident optical axis 021 and a dimension L2 perpendicular to the dimension L21.
2 is each dimension L in the photographing lens unit 100
The outer shape is set so as to approximate 11 and L12.

The optical finder unit 200 is mounted and fixed on the upper surface of the taking lens unit 100 with a slight gap. That is, the finder mounting bosses 129a and 129b projecting from the upper surface of the case 101 of the photographing lens unit 100 are screwed through the mounting holes 202a and 202b provided in the mounting portion of the case 201, whereby the optical finder unit 200 is , Is fixed on the taking lens unit 100.

At this time, the optical finder unit 200
Is a pre-folding optical system 2PA of the finder optical system 205 and a post-folding optical system 2PB of the taking lens unit 100,
A and the optical system 1PB after bending are integrally coupled so as to be adjacent to each other. Particularly, in the present embodiment, the optical axis (incident optical axis 021) of the pre-bending optical system 2PA in the finder optical system 205 is directly above the optical axis (incident optical axis 011) of the pre-bending optical system 1PA in the photographing optical system 105. It is arranged to be located.

The lens group 106 including the photographing zoom lens 122 in the photographing lens unit 100 is provided in the post-bending optical system 1PB of the photographing optical system 105. On the other hand, the optical finder unit 20
Lens group 2 including zoom lens 222 for observation at 0
Reference numeral 06 is provided in the pre-bending optical system 2PA of the finder optical system 205. Therefore, the moving direction of the photographing zoom lens 122 is parallel to the width direction of the camera body 1, and the moving direction of the observation zoom lens 222 is parallel to the thickness direction of the camera body 1. Intersect at a right angle.

In the state where the taking lens unit 100 and the optical finder unit 200 have been assembled, the drive pin 193 protruding above the taking lens unit 100 has an opening 263 provided on the bottom plate of the case of the optical finder unit 200. Through a second zoom lens moving mechanism (described later) in the optical viewfinder unit 200. Reference numeral 103 is a photographing lens window, reference numeral 20
Reference numeral 3 is a finder front window, and reference numeral 204 is a finder eyepiece window.

FIG. 9 is an exploded perspective view showing the structure of the optical finder unit 200. Optical finder unit 2
00 is mainly configured by the unit base 210 shown in the central portion of the figure. The unit substrate 210 has a trough-shaped accommodating concave portion 212 that repeats reflection at a plurality of locations and meanders so as to accommodate the optical component 220 that constitutes the finder optical system 205. The optical component 220 includes a first group lens 221 (1-O), a second group lens (observation zoom lens) 222 (2T), and a third group lens 223, which will be described later.
A finder lens group 206 including (3T), an optical axis bending mechanism 224, and a lens barrel 225 accommodating the post-bending optical system 2PB are provided. The opening of the housing recess 212 is closed by the upper lid 230.

The bottom plate of the unit base 210 is provided with a drive pin guide portion 213 formed of a linear bottomed groove parallel to the optical axis 012 of the taking lens unit 100. The drive pin guide portion 213 is the drive pin 1 on the side of the photographing lens unit 100 shown at the lower end portion in the figure.
By engaging with 93, the rotation of the drive pin 193 is restricted in the specific direction, that is, in the direction orthogonal to the optical axis 012. Thus, the displacement of the drive pin 193, which is provided so as to be displaceable within the predetermined angle range, is restricted by the drive pin guide portion 213.

On the lower surface of the bottom plate of the unit base 210, cam levers 240 and 2 as a second zoom lens moving mechanism are provided.
The lever 50 and the support shaft 270 are attached by a lever attachment plate 260. The lever mounting plate 260 has locking pieces 262a, 262b for mounting and fixing the lever mounting plate 260 on its periphery.
262c.

Second zoom lens moving mechanism (240, 2
50, 270) moves the observation zoom lens 222 and the like in the finder optical system 205 in the optical axis 021 direction of the finder optical system 205 in accordance with the movement of the drive pin 193 whose movement is restricted by the guide portion 213. It is what makes me.

The zoom lens moving mechanism (240, 25
0, 270), a plurality of (two in the present embodiment) cam levers 240, 250 made of thin plates have their base ends commonly supported by a support shaft 270, so that their respective front ends can rotate. Is provided.

The cam levers 240 and 250 are connected to the drive plate 24.
The main components are 4,254. Drive plate 244
Axial holes 241 and 251 are provided at the base end portions of the and 254, respectively. These shaft holes 241 and 251
Is a bearing 211 provided on the bottom plate portion of the unit base 210.
And a bearing 261 of the lever mounting plate 260 and a supporting shaft 270 that are supported in common. Thus, the drive plates 244 and 254, which are thin plates, are mounted in a state in which the respective tip portions are rotatably stacked. Cam portions 243 and 253 formed of arcuate slits are formed at substantially central portions of the drive plates 244 and 254, respectively.

The drive pin 193 passes through the opening 263 of the lever mounting plate 260 and the cam portions 253, 2 are inserted.
It is provided so as to pass through 43, and the penetrating end portion thereof engages with the drive pin guide portion 213 formed of the linear bottomed groove.

Thus, the drive pin 193 is connected to the optical axis 012.
The cam levers 240, 25 as they move in the direction
0 rotates based on the displacement amount according to the shape of each cam part 243, 253. As a result, the photographing optical system 10
The amount of movement of the photographing zoom lens 122 of No. 5 is converted into the amount of movement of the lens group of the finder optical system 205.
The converted movement amount is changed by the movement operation portions 242 and 252 provided at the tips of the drive plates 244 and 254, respectively.
It is transmitted to the second group lens 222 and the third group lens 223 of the lens group 206, respectively.

As a result, at least the movement displacement of the photographing zoom lens 122 is determined by the displacement transmission mechanism (190, 240,
250, 270, etc.) to the observation zoom lens 222.

10 and 11 show the cam lever 240,
FIG. 5 is a diagram showing a relationship between 250 and a plurality of (two in this embodiment) moving lenses 222 and 223 including an observation zoom lens 222 in the finder optical system 205. Figure 1
0 shows the state of WIDE [wide angle], and Fig. 11 shows the state of TELE [telephoto].

In FIGS. 10 and 11, the two movable lenses 222 and 223 are compressed by the urging member 284, and the optical axis 02 of the finder optical system 205 is indicated by the arrow.
They are urged in the directions away from each other along 1. The movement operation parts 242, 25 of the cam levers 240, 250
2 is a drive pin 19 that engages with each cam portion 243, 253.
By the regulation of 3, the moving lens group 2 is resisted against the biasing force.
The lenses 22 and 223 are in contact with lens moving frames 282 and 283 which are integrated with the moving lenses 222 and 223, respectively, so as to control the positioning of the lenses 22 and 223 at predetermined positions.

Each of the cam portions 243 and 253 provided on each of the cam levers 240 and 250 has one of both side surfaces of each through groove as a cam surface effective for exerting a cam function. That is, in the cam portion 243, one side surface (the right side surface in the drawing) in the rotation direction that resists the biasing force of the biasing member 284 in the compressed state is the cam surface. Further, in the cam portion 253, one side surface (left side surface in the drawing) in the rotation direction against the urging force of the urging member 284 in the compressed state is a cam surface. Thus, the moving lenses 222 and 223
Indicates that the drive pin 193 is in the direction of the optical axis 012 (see FIGS. 10 and 1).
1), it moves in a direction perpendicular to the moving direction.

Notch portions 243a and 253a for pin insertion operation are provided at central portions of the other side surfaces of the through-grooves forming the cam portions 243 and 253, respectively, which are located on the opposite side to the cam surfaces. . The notch portions 243a and 253a for pin insertion operation are areas where the groove width of the through groove is widened so that the drive pin 193 can be easily inserted and operated during assembly. In the present embodiment, the notches 243a and 253a have a substantially semicircular shape as shown in the figure. The two semi-circular cutouts 243a and 253a have semi-circular directions opposite to each other and are located on a locus of the same turning radius r centered on the support shaft 270. .

In FIG. 12, the drive pin 19 is formed by utilizing the notched portions 243a and 253a for inserting the pin having the substantially semicircular shape.
It is a figure which shows the procedure of inserting 3 in the cam parts 243 and 253. First, as illustrated, the cam levers 240 and 250
By finely adjusting the rotational position of the two, the two semi-circular cutouts 243a and 253a are found to be a single circular hole. The diameter of the single circular hole is the drive pin 19
It is preset so as to be slightly larger than the outer diameter of 3. Therefore, at the time of assembly, the drive pin 193 may be inserted into the slightly larger single circular hole. Therefore, the drive pin 193 can be very easily inserted into the through-grooves of the cam portions 243 and 253.

FIG. 13 is a characteristic diagram schematically showing the relationship between the moving amount of the drive pin 193 and the moving amounts of the moving lenses 222 and 223. As shown in the figure, as the movement amount of the drive pin 193 increases, the two moving lenses 222 and 223 move.
Move at different movement change rates as shown by straight lines with different slopes (actually drawing a non-linear curve). Accordingly, the two moving lenses 22 including the observation zoom lens 222 are interlocked with the movement of the photographing zoom lens 122.
2 and 223 are moved so as to have a predetermined zoom ratio.

Now, suppose that the drive pin 193 is now displaced in a specific direction perpendicular to the moving direction along the optical axis 012 due to, for example, an error in the assembly position. Then, the zoom ratio or the like of the finder optical system 205 is changed according to the amount of deviation. For example, as shown in the drawing, the drive pin 193 is moved in a specific direction by + d at the predetermined movement position S1.
Suppose that it is just off. Then, the two moving lenses 22
Both the moving amounts of 2, 223 move by a fixed amount + d. As a result, the relative relationship between the moving change rates of the two moving lenses 222 and 223 is broken, and the normal zoom ratio cannot be maintained.

However, in this embodiment, the drive pin 193 in the free state is connected to the guide portion 213.
This strictly regulates the position in a specific direction.
As a result, a relative mounting error between the taking lens unit 100 and the optical finder unit 200 is absorbed by the action of the drive pin 193 in a free state, and the drive pin 193 is displaced in a specific direction. Since it is strictly regulated by the guide portion 213, there is no possibility that the above-mentioned zoom ratio or the like will be disturbed.

(Characteristics of the Embodiment) [1] The camera shown in the embodiment has a bending optical system 1PX for optically bending incident light, and a photographing zoom provided so as to be movable in the optical axis 012 direction. Photographing lens unit 10 having photographing optical system 105 including lens 122
0, a bending optical system 2PX that optically bends incident light, and a finder optical system 205 including an observation zoom lens 222 that is movably provided in the optical axis 021 direction.
And an optical finder unit 200 having the optical finder unit 200, and the pre-bending optical system 1PA and the post-bending optical system 1 in the bending optical system 1PX of the taking lens unit 100.
The pre-bending optical system 2PA and the post-bending optical system 2PB in the folding optical system 2PX of the optical finder unit 200 are arranged corresponding to PB so as to be adjacent to each other.

In the above camera, the pre-bending optical systems (1PA, 2PA) and the post-bending optical systems (1PB, 2PB) of the taking lens unit 100 and the optical finder unit 200 are arranged so as to be adjacent to each other. It Therefore, both units 100, 20
No wasted space is generated in the assembling of 0, and it is possible to make it thin and compact as a whole. Thus, it contributes to downsizing of the camera including the folding optical system (1PX, 2PX) and the zoom lens (122, 222).

[2] The camera shown in the embodiment is the camera described in [1] above, and the zoom lens 122 for photographing in the photographing lens unit 100 is an optical system after bending of the photographing optical system 105. Provided in 1PB,
The observation zoom lens 222 in the optical finder unit 200 is provided in the pre-bending optical system 2PA of the finder optical system 205, and the movement displacement of the photographing zoom lens 122 causes a displacement transmission mechanism (190, 24).
0, 250, 270) and is transmitted to the observation zoom lens 222.

In the above camera, the optical system 106 including the photographing zoom lens 122, which requires a relatively large space, is the post-bending optical system 1P of the photographing optical system 105.
It is provided in B. The optical system 206 including the observation zoom lens 222, which occupies a relatively small space, is provided in the pre-bending optical system 2PA of the finder optical system 205. Therefore, the lengths of the pre-bending optical systems 1PA and 2PA in the taking lens unit 100 and the optical finder unit 200 are both relatively short, and the lengths of the post-bending optical systems 1PB and 2PB are both relatively long. As a result, the taking lens unit 100 and the optical finder unit 200 have similar outer shapes, and an efficient arrangement pattern can be secured.

[3] The camera shown in the embodiment is the camera described in [2] above, and the moving direction of the observation zoom lens 222 is the photographing zoom lens 122.
It is characterized in that it intersects at right angles to the moving direction of.

[4] The camera shown in the embodiment is the camera described in [3], and the moving direction of the photographing zoom lens 122 is parallel to the width direction of the camera body 1. The moving direction of the observation zoom lens 222 is parallel to the thickness direction of the camera body 1.

In the above camera, since the moving direction of the zoom lens 122 for photographing which requires a relatively large stroke is parallel to the width direction of the camera body 1, the photographing lens unit 122 increases the thickness dimension of the camera body 1. There is no fear of causing it. Therefore, it does not hinder the thinning of the camera.

The optical system 206 including the observation zoom lens 222 is provided in the pre-bending optical system 2PA which is the objective system of the finder optical system 205. Therefore, the optical system including the observation zoom lens 222 is temporarily changed to the post-bending optical system 2P which is an eyepiece system of the finder optical system 205.
Compared with the case where the optical disc is provided in B, no extra optical component is required, and only the minimum necessary optical component can be used. Further, since the camera body 1 can be accommodated along the thickness direction, which does not have much room in terms of space, it is possible to arrange with a good space factor.

[5] The camera shown in the embodiment is the camera described in any one of the above [1] to [4], and the photographing optical system 10 of the photographing lens unit 100.
Reference numeral 5 denotes the post-bending optical system 1 of the bending optical system 1PX.
The optical system for a digital camera is provided with an image sensor 126 at the end of the optical axis 012 in PB.

(Modification) The camera shown in the embodiment is
The following modifications are included.

A cam surface having a cam portion provided along one edge of the cam lever.

A device provided with a guide portion consisting of a through guide groove.

A mirror is used as the reflecting member of the folding optical system.

[0079]

According to the present invention, it is possible to provide a camera having the following operational effects.

(A) Since both units of the taking lens unit and the optical finder unit are assembled so that the pre-bending optical systems and the post-bending optical systems of the taking lens unit and the optical finder unit correspond to each other, the taking optical system having the folding optical system with zoom function is provided. The camera body including the lens unit and the optical finder unit can be made thin and compact.

(B) Since the structure is simple, it can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a schematic external view showing a schematic configuration of an electronic camera according to an embodiment of the present invention.

FIG. 2 is an external perspective view showing the taking lens unit according to the embodiment of the present invention with the back cover removed.

FIG. 3 is an exploded perspective view showing a taking lens unit according to an embodiment of the present invention, which is separated into a main mechanism, a zoom mechanism, and a back cover.

FIG. 4 is a cross-sectional view of a main part of a taking lens unit according to an embodiment of the present invention as seen from the front, and FIG.
FIG. 4B is a diagram showing a [wide-angle] state, and FIG. 4B is a diagram showing a TELE [telephoto] state.

FIG. 5 is a cross-sectional view of a main part of a taking lens unit according to an embodiment of the present invention viewed from above.

FIG. 6 is a diagram showing a configuration of a finder drive mechanism of a taking lens unit according to an embodiment of the present invention together with a drive member,
6A is a side view of a main part, and FIG. 6B is a side view of FIG.
FIG. 6B is a sectional view taken along line 6b-6b of FIG.

FIG. 7 is a view showing a correspondence relationship between a taking lens unit and an optical finder unit according to an embodiment of the present invention, and a perspective view showing the taking lens unit and the optical finder unit separately.

FIG. 8 is a schematic plan view showing a schematic configuration of a finder optical system in an optical finder unit according to an embodiment of the present invention.

FIG. 9 is an exploded perspective view showing a configuration of an optical finder unit according to an embodiment of the present invention.

FIG. 10 is a diagram showing a relationship (WIDE [wide-angle] state) between a cam lever according to an embodiment of the present invention and a plurality of moving lenses including an observation zoom lens in a finder optical system.

FIG. 11 is a diagram showing a relationship (TELE [telephoto] state) between a cam lever according to an embodiment of the present invention and a plurality of movable lenses including an observation zoom lens in a finder optical system.

FIG. 12 is a diagram showing a procedure for inserting and operating a drive pin into a cam portion by using a notch portion for pin insertion operation according to an embodiment of the present invention.

FIG. 13 is a characteristic diagram schematically showing the relationship between the movement amount of the drive pin and the movement amount of the moving lens according to the embodiment of the present invention.

[Explanation of symbols]

1 ... Camera body 100 ... Photographing lens unit 105 ... Shooting optical system 110, 224 ... Optical axis bending mechanism 1PX, 2PX ... Bending optical system 1PA, 2PA ... Optical system before bending 1PB, 2PB ... Optical system after bending O11, 021 ... First optical axis (incident optical axis) O12,022 ... Second optical axis 120 ... Lens barrel 121 to 123 ... First lens group to third lens group 125 ... Low-pass filter 126 ... Image sensor 130 ... Optical member 134 ... Holding frame 131-133 ... 1st to 3rd lens holding frames 140 ... AF motor 155 ... regulating member 150 (151, 152) ... Flexible printed circuit board 160 ... Shutter unit 180 ... Zoom motor 190 ... Displacement transmission slider 191 ... Driving member 192 ... Sliding member 193 ... Drive pin 200 ... Optical finder unit 205 ... Finder optical system 221 to 223 ... First group lens to third group lens 282, 283 ... 2nd and 3rd group lens holding frame 240, 250 ... Cam lever 243, 253 ... Cam part (slit) 243a, 253a ... Notches for pin insertion operation 270 ... Spindle

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H018 AA02 BA02                 2H100 AA31 BB05 BB09                 2H101 FF08                 5C022 AA13 AB66 AC02 AC03 AC54                       AC74 AC78

Claims (5)

[Claims] 1. A photographic lens unit having a bending optical system for optically bending incident light and a photographic optical system including a photographic zoom lens movably provided in an optical axis direction, and an incident light optical unit. An optical viewfinder unit having a viewfinder optical system including an observation zoom lens that is movably provided in the optical axis direction, and a pre-folding optical system and a viewfinder optical system in the taking optical system of the taking lens unit. A camera in which a pre-bending optical system and a post-bending optical system in the folding optical system of the optical finder unit are arranged so as to be adjacent to the rear optical system. 2. A photographic zoom lens in the photographic lens unit is provided in a post-bending optical system of the photographic optical system, and an observing zoom lens in the optical finder unit is a pre-bending optical system of the finder optical system. The camera according to claim 1, wherein the camera is configured so that the displacement of the photographing zoom lens is transmitted to the observation zoom lens by a displacement transmission mechanism. 3. The camera according to claim 2, wherein the moving direction of the observation zoom lens is a direction intersecting the moving direction of the photographing zoom lens at a right angle. 4. The moving direction of the photographing zoom lens is parallel to the width direction of the camera body, and the moving direction of the observation zoom lens is parallel to the thickness direction of the camera body. The camera according to claim 3, wherein: 5. The taking optical system of the taking lens unit comprises:
The camera according to any one of claims 1 to 4, which is an optical system for a digital camera including an image pickup device at a terminal end of an optical axis in the post-bending optical system of the folding optical system.