JPH07294790A - Flexible printed board - Google Patents

Abstract

PURPOSE:To suppress the cost of mounting electrical parts and the damage of the parts at mounting and also to efficiently pack many parts in a small space left in a lens barrel. CONSTITUTION:The flexible printed board 1 stored in the lens barrel while being bent into a polygonal ring along the inside wall of the lens barrel is provided with flat parts 9a to 9g on which the electrical parts 11a to 11i are mounted and a belt-like part for connecting the flat parts 9a to 9g, the flat part 9c is connected with the flat part 9d through a connection part 10 which is installed adjacent to the opposite side of the belt-like part of the flat part 9d and parallel to the belt-like part. When the printed board is stored in the lens barrel 2, the connection part 10 is bent, and such a two-story structure that the flat part 9c is superposed on the flat part 9d in a radial direction so that both of the surfaces on which the electrical parts are mounted may face outward the lens barrel is introduced, and the flexible printed board 1 is stored in a space between the lens barrel 2 and a pedestal 16 along the outer peripheral part of the pedestal 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible printed circuit board, and more particularly to a flexible printed circuit board arranged in a lens barrel having a photographing optical system.

[0002]

2. Description of the Related Art Conventionally, various types of flexible printed circuit boards arranged inside a cylindrical casing such as a lens barrel having a photographing optical system have been proposed.
In Japanese Patent No. 6190, a band-shaped substrate is bent into a substantially polygonal shape in order to accommodate it along a wall surface in a cylindrical or polygonal cylindrical housing, and electric parts are mounted on a flat surface portion between the bent portions. There is disclosed a flexible printed circuit board configured so as to be housed in the housing so as to be substantially parallel to the axial direction of the housing.

Further, in the Japanese Patent Application No. 5-54355, the applicant of the present application discloses, as a flexible printed circuit board to be housed in a lens barrel, an annular portion having an opening at the center through which a photographing light beam passes, and the circle. A protrusion for mounting an electrical component that protrudes outward or inward from the ring-shaped portion, and bends the protrusion so that it is substantially parallel to the optical axis of the lens barrel and stores it in the lens barrel. We propose a flexible printed circuit board with such a structure.

Such a flexible printed circuit board is
By bending the lens barrel along the inner wall surface into a substantially tubular shape, the lens barrel can be efficiently stored in a region outside the photographing light flux.

[0005]

In the flexible printed circuit board having the above-mentioned structure, the electric parts are mounted on only one surface of the board, and only one layer is mounted in the radial direction. Since density mounting is difficult, it is necessary to increase the size of the board and the mounting area to mount many components. However, it is difficult to increase the area of the part on which the electrical parts are mounted on the board in a limited space for housing the board in the lens barrel. There is a risk that it will not run out.

There is a method of mounting many components on both sides of a flexible substrate in order to mount many components on the substrate. In this case, solder reflow is required twice when mounting on both sides.
There is a problem that components may be easily damaged and mounting cost increases due to double-sided mounting.

The present invention has been made in view of these circumstances, and suppresses the cost of mounting electric parts and damage to the parts during mounting, and efficiently mounts a large number of parts in a small space in the lens barrel. It is an object of the present invention to provide a flexible printed circuit board that can be manufactured.

[0008]

A flexible printed circuit board according to the present invention is a flexible printed circuit board which is arranged inside a lens barrel having a photographing optical system and outside a photographing light beam, in which electric parts are mounted on the same surface side. The first and second flat portions and a connecting portion that electrically connects the first and second flat portions and extends in the circumferential direction of the lens barrel. By bending the portion, the first and second flat portions are configured to overlap in the radial direction so that the mounting surfaces of the electric components are both directed to the outside of the lens barrel.

[0009]

When arranging the flexible printed circuit board in the lens barrel, the connecting portion for electrically connecting the first and second flat surface portions on which electric parts are mounted is bent, and the first and second flat portions are bent. The plane portions are overlapped in the radial direction so that the mounting surfaces of the electric components are both directed to the outside of the lens barrel.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing a state in which the flexible printed circuit board of the present embodiment is housed in a lens barrel, and FIG. 2 shows a developed shape of the flexible printed circuit board. FIG. 3 is a developed view, and FIG. 3 is a cross-sectional view showing the configuration of the flexible printed circuit board stored in the lens barrel.

The flexible printed circuit board of this embodiment is
A foldable substrate to be housed in the lens barrel,
The structure is such that the lens barrel is housed in the lens barrel in a state of being bent into a polygonal ring shape along the circumferential direction of the inner wall surface of the lens barrel.

In the present embodiment, a configuration example in which the flexible printed circuit board is housed in the lens barrel of the camera will be described. FIG. 1 shows a state in which a lens barrel accommodating a flexible printed circuit board is attached to a camera body.

An electric component is mounted on the flexible printed circuit board 1, and the flexible printed circuit board 1 is housed in the outer frame 3 of the lens barrel 2 in a shape obtained by bending a substantially band-shaped product into a polygonal annular shape. Inside the lens barrel 2, there is a taking lens 4
Is provided, and the flexible printed circuit board 1 is circumferentially arranged in a region inside the outer frame 3 outside the passing region of the photographing light flux 5 such that the component mounting plane is substantially parallel to the optical axis of the photographing lens. It is like this. The lens barrel 2 accommodating the flexible printed circuit board 1 is attached to the camera body 6. Note that reference numeral 7 in the drawing indicates a shooting surface (film surface of the camera).

The flexible printed circuit board 1 has a developed shape as shown in FIG. 2, and has a band-shaped portion 8 formed in the shape of a band and a protruding portion formed on one side in a direction orthogonal to the longitudinal direction of the band-shaped portion 8. It has the plane parts 9a-9g. The flat surface portion 9c is cut away from the strip-shaped portion 8 and is a connection portion that is adjacent to the flat surface portion 9d on the side opposite to the strip-shaped portion 8 side and is parallel to the strip-shaped portion 8 so as to bite into the end portion. 1
It is connected to the plane portion 9d by 0. The flat portion 9a
Electrical components 11a to 11i are mounted on 9a to 9g, and a wiring pattern 12 constituting an electric circuit is arranged on the strip-shaped portion 8 and the connecting portion 10, and a flat portion 9a is formed.
~ 9g is electrically connected. Here, the flat surface portion 9c
All the wirings for electrically connecting the other flat portions 9a, 9b, 9e to 9g are arranged via the connecting portion 10 and the flat portion 9d.

Further, the flat portions 9a, 9b, 9d to 9g.
The bent portions 13a to 13f shown by broken lines in the drawing
However, the bent portions 14a to 14e are provided on the strip portion 8 and the connection portion 10
Bent portions 15a and 15b are formed on the
When the flexible printed board 1 is housed in the lens barrel 2, the bent portions 13a to 13f and 14a to 1 are formed.
4e and 15a, 15b are bent to form a polygonal ring.

The structure of this substrate has a flat portion for mounting electric parts and a strip portion and a connection portion for arranging the wiring pattern, and the strip portion and the connection portion can be used as an area dedicated to the wiring pattern. Therefore, it is easy to lay out the wiring that connects the components, the degree of freedom in wiring design is increased, and it is possible to mount higher-density electrical components and to design the board efficiently and with sufficient performance.

Next, a method of assembling the flexible printed circuit board 1 when it is housed in the lens barrel 2 will be described.

First, the plane portions 9a, 9b, 9d to 9g of the flexible printed circuit board 1 are bent along the bent portions 13a to 13f by about 180 ° with the component surface on which the electric components 11a to 11i are mounted facing outward. The strip-shaped portion 8 is superposed on the surface of the portions 9a to 9g on which the electric component is not mounted. Next, the bent portions 15a and 15b of the connection portion 10 are bent so that the flat surface portion 9c is located substantially parallel to the upper surface of the flat surface portion 9d, and the flat surface portion 9c and the flat surface portion 9d are made into a two-story structure.
Then, the flexible printed board 1 formed into a substantially strip shape is bent along the bent portions 14a to 14e so that the component surfaces of the flat portions 9a to 9g are on the outside, and is formed into a polygonal (generally hexagonal) ring. To do.

The flexible printed circuit board 1 thus formed is housed in the lens barrel 2 together with the pedestal 16 having a substantially annular shape as shown in FIG. 3, and the outer peripheral portion of the pedestal 16 and the outer frame 3 of the lens barrel 3 are housed. It is placed in the space 17 between the inner surface of the. Figure 3
[Fig. 4] is a view of the inside of the lens barrel as seen from the mount portion side connected to the rear camera body.

The pedestal 16 has a substantially annular shape having an outer peripheral surface of a polygonal shape in which a flat surface portion 16a is formed in the circumferential direction, an inner peripheral surface of a cylindrical shape, and an opening portion 16b in a central portion. And is made of, for example, plastic. The flexible printed circuit board 1 has a flat portion 16 of the pedestal.
The flat surface portion 9 of the substrate in which the electric components 11a to 11i are mounted on a.
A, 9b, 9d to 9g are assembled and stored on the outer peripheral portion of the pedestal 16 so as to be arranged correspondingly. The opening 16b on the inner peripheral side of the pedestal 16 has a diameter larger than the diameter of the passage area of the imaging light flux 5 in the lens barrel 2.

In the portion of the two-story structure of the flat surface portion 9c and the flat surface portion 9d, the flat surface portion 9c is arranged substantially parallel to the upper surface of the flat surface portion 9d so that both component mounting surfaces face outward in the radial direction. And the electric component 11 mounted on the plane portion 9d.
The flat surface portion 9c is bonded and fixed to the upper portion of the outer surface of e by the adhesive 18. Here, in the flat surface portion 9c, the flat surface portion 9d is configured such that the mounted electrical component is smaller in the upper portion in the circumferential direction than in the lower portion of the two-story structure.
Parts smaller than those in the circumferential direction are mounted. Therefore,
The outer flat portion 9c is formed to have a smaller width in the circumferential direction than the inner flat portion 9d.

In the portion of this two-story structure, the connecting portion 10 extending in the circumferential direction is bent at a bent portion 15b to the component mounting surface side by approximately 180 °, and at the bent portion 15a, the component mounting surface side. Is bent by about 180 ° on the opposite side to the flat portion 9c.
And 9d are arranged between the plane portions 9c and 9d in a state of being formed in a substantially doglegged shape bent near the center.

The portion of the strip portion 8 where the flat portion 9c is located, that is, the portion between the bent portions 14a and 14b is
Since it is longer than the section of the other strip-shaped portion 8 and is left over when the flexible printed circuit board 1 is stored, as shown in FIG. 3, the strip-shaped portion 8 is formed so that the flat surface portions 9 a to 9 g fit the outer peripheral portion of the pedestal 16. Are folded and overlapped to form the overlapping portion 19. The flexible printed circuit board 1 thus assembled is assembled from the rear side of the lens barrel 2 and stored in the lens barrel. If both ends 20 of the strip 8 are long, they are stored in a stacked state. Superimposed portion 19 of the strip portion 8
Alternatively, the both ends 20 may be stopped by using a stop member or an adhesive to suppress the overlapped portion.

As described above, in the present embodiment, the flexible printed circuit board is connected to the first and second plane portions on which the electric components are mounted on the same side, and the first and second plane portions. And a connecting part provided with a wiring part, and when the connecting part is formed into a polygonal annular shape and is housed in the lens barrel, the connecting part is bent to form the first and second flat parts as electric parts. As a two-story structure in which the mounting surfaces of both are overlapped in the radial direction so as to face outward, a large number of components are mounted on the substrate so that they can be efficiently stored in a small space in the lens barrel.

Further, when the board has a two-story structure, since the electric component mounting surfaces of the boards are stacked in parallel without being aligned with each other, the parts do not come into contact with each other and there is no risk of short-circuiting. Further, when the polygonal annular substrate is arranged in the cylindrical space, the component mounting surface is on the outer peripheral side and the substrate surface is on the inner peripheral side, so it is stored more than when the substrate surface is located on the outer peripheral side. The diameter of the cylinder becomes smaller. Furthermore, in the portion of the two-story structure, since the smaller parts are mounted in the upper part (outer peripheral side) in the circumferential direction than in the lower part (inner peripheral side), the two-story structure of the two-story structure The board can be stored.

According to this structure, by forming a part of the flexible printed board into a two-story structure, many parts can be mounted on the board, and the flexible printed board on which the many parts are mounted is narrow. It can be stored efficiently even in space. Further, by arranging the component mounting surface of the board on the outside and further reducing the circumferential width of the board on the outer peripheral side in the portion of the two-story structure,
The outer diameter of the lens barrel to be stored can be minimized.

Also, by mounting the electric component only on one surface of the flexible printed circuit board, the solder reflow at the time of mounting the component is only required once, so that there is little risk of damage to the component and the cost for mounting the electric component can be kept low. . Further, in the present embodiment, since the connecting portion 10 of the substrate is formed into a shape that bites into the area including the end portion of the flat surface portion 9d in the optical axis direction, the portion that protrudes outward or the inside in the developed shape of one substrate Since there is no unnecessary blank portion in the area, the substrate can be taken efficiently in area.

Next, an example in which the expanded shape of the flexible printed circuit board is changed will be described in the following embodiments.

4 and 5 relate to the second embodiment of the present invention. FIG. 4 is a development view showing a developed shape of the flexible printed board, and FIG. 5 is a configuration of the flexible printed board housed in the lens barrel. FIG.

The second embodiment is a first example in which the expanded shape of the flexible printed circuit board is changed. The assembling shape and the like in the lens barrel is almost the same as that of the first embodiment, and the detailed description is omitted here.

Flexible printed circuit board 3 of the second embodiment
1, flat surface portions 39a to 39g are projectingly formed on one side in a direction orthogonal to the longitudinal direction of the strip-shaped portion 38 formed in a strip shape. The flat portion 39c is cut off from the strip portion 38, and the flat portion 39d is separated from the flat portion 39d by a connecting portion 40 extending in parallel with the strip portion 38 from an end of the flat portion 39d opposite to the strip portion 38 side. It is connected. The flat portions 39a to 39g
In the same manner as in the first embodiment, an electric component is mounted on, and the flat portions 39a to 39g are electrically connected by the wiring pattern arranged on the strip portion 38 and the connecting portion 40. That is, as compared with the first embodiment, the plane portion 39c and the plane portion 39
The connecting portion 40 for connecting d is formed to extend from the side end portion of the flat surface portion 39d.

When the lens barrel 2 is housed in the lens barrel 2, the flat surface portions 39a, 39b, 39 of the flexible printed board 31 are accommodated.
The parts d to 39g are bent along the bent parts 13a to 13f by about 180 ° with the component mounting surface on the outside, and the connecting part 40 is arranged so that the flat part 39c is located substantially parallel to the upper surface of the flat part 39d.
Bent the bent portions 15a, 15b to form the flat surface portion 39c and the flat surface portion 39d in a two-story structure, and bend along the bent portions 14a to 14e so that the component mounting surface of the flat surface portion is located outside. It is formed into a polygonal (approximately hexagonal) ring.
In this state, as in the first embodiment, it is placed on the outer peripheral portion of the pedestal and stored in the lens barrel.

The flexible printed circuit board 31 is mounted on the base 16
FIG. 5 shows a state in which the lens barrel 2 and the lens barrel 2 are housed together. Similar to the first embodiment, the flexible printed circuit board 31 is
Flat part 39 of the board on which electric parts are mounted on the flat part of the pedestal
a, 39b, 39d to 39g are arranged correspondingly. The portion of the two-story structure of the plane portion 39c and the plane portion 39d is
The flat surface portion 39d and the flat surface portion 39c are superposed substantially parallel to each other in the radial direction so that both component mounting surfaces face outward, and the flat surface portion 39c is bonded to the upper outer surface of the electric component 11e mounted on the flat surface portion 39d by the adhesive 18. It is fixed and configured.

In this embodiment, the flat surface portion 39d and the flat surface portion 3 are formed.
Since the connecting portion 40 connecting 9c is not in the shape of the end portion of the flat portion 39d, the connecting portion 40
Is bent approximately 180 ° toward the component mounting surface side at the bent portion 15b, and approximately 180 ° at the bent portion 15a on the side opposite to the component mounting surface side.
The flat part 3 is bent near ゜ and is not bent in a V shape.
It is diagonally arranged between 9c and 39d. In addition, the strip portion 38
The portion between the bent portions 14a and 14b is long, and the amount of the overlapping portion 41 that is folded when the substrate is stored is large. As for the treatment of both end portions 42 of the strip portion 38, if they are long as in the first embodiment, they are stored in a stacked state.

In the structure of the second embodiment, the connecting portion 40 of the substrate is not formed in the area of the flat portion 39d but is formed so as to extend from the side end portion of the flat portion 39d. The plane portion 39d can be formed to have the same size as the other plane portions, so that a larger electric component can be mounted and the wiring can be easily designed.

6 and 7 relate to the third embodiment of the present invention. FIG. 6 is a development view showing a developed shape of the flexible printed board, and FIG. 7 is a configuration of the flexible printed board housed in the lens barrel. FIG.

The third embodiment is a second example in which the expanded shape of the flexible printed board is changed. The assembling shape and the like in the lens barrel is almost the same as that of the first embodiment, and the detailed description is omitted here.

Flexible printed circuit board 5 of the third embodiment
1, flat surface portions 59a to 59g are projectingly formed on one side in a direction orthogonal to the longitudinal direction of the strip-shaped portion 58 formed in a strip shape. The flat surface portion 59c is cut away from the strip-shaped portion 58, and the flat surface portion 59d is separated from the flat portion 59d by a connecting portion 60 extending in parallel with the strip-shaped portion 58 from an end of the flat surface portion 59d on the side opposite to the strip-shaped portion 58 side. It is connected. The present embodiment has substantially the same configuration as the flexible printed circuit board 31 of the second embodiment shown in FIG. The flat portion 59b is formed so as to project from the strip-shaped portion 58 in the region. The configuration of the other parts is similar to that of the second embodiment.

When the flexible printed circuit board 51 is housed in the lens barrel 2, the flexible printed board 51 is bent along the bent portions 13a to 13f and the bent portion 15 as in the second embodiment.
a and 15b are bent to form a two-story structure in which the flat surface portion 59c and the flat surface portion 59d are superposed in the radial direction, and the bent portion 14a
Bend along 14e to form a polygonal (approximately hexagonal) ring.

FIG. 7 shows a state in which the flexible printed circuit board 51 formed in the shape of a polygonal ring is housed in the lens barrel 2 together with the pedestal 16. Similar to the second embodiment, the flat portion 59c and the flat portion 59d have a two-story structure. The flat portion 59c and the flat portion 59d are overlapped in a substantially radial direction so that both component mounting surfaces face outward. The connecting portion 60 is arranged obliquely between the two. Further, the positional relationship between the component mounting portion in the flat surface portion 59b and the overlapping portion 61 of the strip-shaped portion 58 is opposite to that in the first and second embodiments, and the flat surface portion 5
The overlapping portion 61 is arranged on the 9a side. The processing of both end portions 62 of the strip portion 58 is similar to that of the first embodiment.

Flexible printed circuit board 3 of the second embodiment
1, the plane portion 59c and the plane portion 59 of the two-story structure
When the component mounted on the flat surface portion 39b adjacent to d is small, the flexible printed circuit board 51 of the third embodiment is used.
By using the above configuration, since there is no blank portion in the developed shape as compared with the second embodiment, the area of the substrate can be reduced and the wiring design becomes easy.

In the first to third embodiments described above, the lens barrel in which the flexible printed board is housed is applied to, for example, a lens interchangeable single-lens reflex camera, but is not limited to this. It can also be applied to other devices.

The structure of the flexible printed circuit board is not limited to that shown in the figure. In the flexible printed circuit board, the same operational effect can be obtained even if the shape, number and size of the flat surface portion or the number of two-story structures are different. Further, the flexible printed circuit board may not be arranged over the entire circumference of the lens barrel, and other parts such as mechanical parts may be arranged in a space in the circumferential direction where the flexible printed circuit board is not provided. Further, the strip-shaped portion or the connection portion that connects the respective flat surface portions of the flexible printed board is not necessarily strip-shaped, but may have another shape such as an arc shape.

[Appendix] According to the embodiment of the present invention as described in detail above, the following constitution can be obtained. That is, (1) in a flexible printed circuit board arranged inside a lens barrel having a photographing optical system and outside a photographing light flux, first and second flat surface parts on which electric components are mounted on the same surface side; A connecting portion that electrically connects the first and second flat portions and extends in the circumferential direction of the lens barrel, and bends the connecting portion to form the second flat portion. On the mounting surface side of the electric component in the first flat surface portion, and the mounting surface of the electric component of each of the flat surface portions is directed to the outside of the lens barrel.

(2) In the flexible printed circuit board arranged inside the lens barrel having the photographing optical system and outside the photographing light flux, the first and second plane portions on which the electric parts are mounted on the same surface side are provided. A connection portion that electrically connects the first and second flat portions and extends in the circumferential direction of the lens barrel, and bends the connection portion to form the first and second connection portions. 2. A flexible printed circuit board, characterized in that the two flat portions are overlapped in the radial direction so that the mounting surfaces of the electric components both face the outside of the lens barrel.

(3) In the flexible printed circuit board arranged inside the lens barrel having the photographing optical system and outside the photographing light flux, the first and second plane portions on which the electric parts are mounted on the same surface side are provided. A connection portion that electrically connects the first and second flat portions and extends in the circumferential direction of the lens barrel, and bends the connection portion to form the first and second connection portions. A flexible printed circuit board, characterized in that the two flat portions are superposed in the radial direction.

(4) In the flexible printed circuit board which is arranged inside the lens barrel having the photographing optical system and outside the photographing light flux, the flexible printed circuit board is arranged substantially parallel to the optical axis of the photographing optical system and faces the outside. A first flat surface portion on which the electric component is mounted; a second flat surface portion on which the electric component is mounted on a surface which is superposed substantially in parallel with the first flat surface portion in the radial direction and faces outward. A flexible printed circuit board, comprising: a connection portion that electrically connects the first and second flat portions.

(5) In the supplementary note (1), the width of the second flat surface portion in the circumferential direction of the lens barrel is formed to be narrower than that of the first flat surface portion.

(6) In the appendix (1), the second flat surface portion is adhered to the surface of the electric component mounted on the first flat surface portion facing outward.

(7) In the supplementary note (1) or (2), the connecting portion includes the ends of the first and second flat portions in the optical axis direction.

(8) In the above Supplementary Note (1) or (2), the first and second plane portions are formed so as to be substantially in contact with each other in the circumferential direction in a state of being developed on the plane.
The connection portion is formed into a shape that bites into one flat surface portion.

(9) In the above supplementary note (1) or (2), there is further provided another area in which an electric component is mounted, and the other area and the second flat surface are electrically connected. All the wirings to be connected pass through the connection portion and the first plane portion.

(10) In any one of appendices (2), (3) and (4), the flat surface portion of the first and second flat surface portions that is superposed on the outer side in the radial direction is The width in the circumferential direction of the lens barrel is formed to be narrower than the flat portion that is overlapped inside.

(11) In any one of the above-mentioned Supplementary Notes (2), (3) and (4), the flat surface portion of the first and second flat surface portions which is superposed on the outer side in the radial direction is , Is bonded to the surface of the electric component mounted on the planar portion that is superposed on the inner side, which faces outward.

[0055]

As described above, according to the present invention, it is possible to suppress the cost of mounting electric parts and damage to the parts during mounting, and to mount a large number of parts efficiently in a small space in the lens barrel. There is an effect that a possible flexible printed circuit board can be provided.

[Brief description of drawings]

1 to 3 relate to a first embodiment of the present invention,
FIG. 1 is a perspective view showing a state where the flexible printed circuit board of this embodiment is housed in a lens barrel.

FIG. 2 is a development view showing a development shape of a flexible printed circuit board in the first embodiment.

FIG. 3 is a cross-sectional view showing a configuration of a flexible printed circuit board in a state of being housed in a lens barrel in a first embodiment.

4 and 5 relate to a second embodiment of the present invention, and FIG. 4 is a developed view showing a developed shape of a flexible printed circuit board.

FIG. 5 is a cross-sectional view showing the configuration of a flexible printed circuit board housed in a lens barrel in a second embodiment.

6 and 7 relate to a third embodiment of the present invention, and FIG. 6 is a development view showing a development shape of a flexible printed circuit board.

FIG. 7 is a cross-sectional view showing the configuration of a flexible printed circuit board housed in a lens barrel in a third embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Flexible printed circuit board 2 ... Lens barrel 5 ... Imaging luminous flux 8 ... Band-shaped part 9a-9g ... Plane part 10 ... Connection part 11a-11i ... Electrical component 13a-13f, 14a-14e, 15a, 15b ... Bent part 16 … Pedestal 19… Superimposed part

Claims (3)

[Claims] 1. A flexible printed circuit board arranged inside a lens barrel having a photographing optical system and outside a photographing light beam, wherein first and second flat portions on which electric components are mounted on the same surface side, A connecting portion that electrically connects the first and second flat portions and that extends in the circumferential direction of the lens barrel; and bending the connecting portion to form the first and second The flexible printed board is characterized in that the flat surface portion of the electric component is radially overlapped so that the mounting surfaces of the electric components are both directed to the outside of the lens barrel. 2. A flat surface portion of the first and second flat surface portions, which is superposed on the outer side in the radial direction, has a width in the circumferential direction of the lens barrel which is larger than a flat surface portion which is superposed on the inner side. 2. The flexible printed circuit board according to claim 1, wherein the flexible printed circuit board is formed narrow. 3. A flat surface portion of the first and second flat surface portions, which is superposed on the outer side in the radial direction, faces outward in an electric component mounted on the flat surface portion which is superposed on the inner side. The flexible printed circuit board according to claim 1, wherein the flexible printed circuit board is bonded to the surface.