JP3274733B2 - Camera printed circuit board mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board mounting structure for a camera, and more particularly, to a camera printed circuit board mounting structure housed in a camera body.

[0002]

2. Description of the Related Art Conventionally, in mounting a wiring of an electric circuit of a camera, a flexible printed circuit board having flexibility is often used in order to effectively use a narrow space in the camera.

[0003] However, recent cameras have become highly electronic and multifunctional, and as a result, the circuit mounting scale has increased, and various switches and sensors have been distributed and arranged in various places in the camera. As a result, the wiring of the flexible printed circuit board as the wiring mounting has become complicated to sew a narrow space in the camera. In addition to this, the miniaturization of cameras is rapidly progressing, and a large space is hardly taken in the cameras, and the arrangement of electric components mounted on a flexible printed circuit board tends to be dispersed. Under such circumstances, a large area is required as a flexible printed circuit board for wiring between electric components.

Under such circumstances, a printed circuit board mounting structure in a camera for automatically loading a film loaded in a film cartridge in a state wound around a spool by rotating the spool and automatically loading the film is described in more detail. A hard printed circuit board is mounted on the rear surface inside the camera body so as to be mountable, and a contact of the flexible printed circuit board having a surface portion on which components can be mounted is electrically connected to a contact provided on the hard printed board. Various board mounting structures for a camera to be connected have been conventionally proposed.

As one example of such a printed circuit board mounting structure for a camera, Japanese Patent Laid-Open Publication No. Sho 62-141524 discloses a flexible printed circuit board to be mounted on which a plurality of flexible printed circuit boards for each mounting surface portion such as an upper surface, a lower surface, and a side surface of a camera body are mounted. And each of the divided bodies is bent toward a common camera body surface part on which the respective divided bodies are not mounted, and a connection state is formed in a series on the entire surface part. With such a configuration, the workability when mounting the substrate is improved, and the cost is reduced.

Another example of the camera board mounting structure is described in Japanese Utility Model Laid-Open No. 63-113135. The electric circuit mounting structure of the camera described in the publication includes a photometric sensor for measuring the brightness of the subject, a dimming sensor for measuring the flash light amount at the time of flash shooting, and output signals from both sensors. An electric circuit element such as a control circuit element for performing exposure and strobe photographing control is mounted on a single flexible printed circuit board, and the flexible printed circuit board is mounted on a camera upper surface including an upper surface of a pentaprism, and side and lower surfaces of a mirror box. The flexible printed circuit boards are arranged continuously along the holding plate and at least one place.

[0007]

However, according to the technical means described in Japanese Patent Application Laid-Open No. Sho 62-141524,
Since there are a plurality of divided substrates, not only is the mounting to the camera body troublesome because of the plurality of substrates, but also because there are many bent portions because the gaps in the camera are sewn, there is a problem that the mounting area is small. Further, in Japanese Unexamined Utility Model Publication No. 63-113135, since the substrate is a single flexible printed circuit board, the number of bent portions increases, and a large mounting area cannot be obtained for the substrate area. In addition, it is difficult to mount the flexible printed circuit board on the camera body, and there is a problem that a large-area flexible printed circuit board leads to an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a printed circuit board mounting structure of a camera which is inexpensive, has good workability, and has a large mounting area.

[0009]

In order to achieve the above object, a printed circuit board mounting structure for a camera according to the present invention is provided.
A printed circuit board arranged on the back of the camera body, on which the camera's electric parts are mounted, and on the surface of which a connector part for making an electrical connection with another electric board is mounted,
Provided on at least one surface of another surface other than the back surface of the camera body, with the connector parts <br/> a contact portion electrically connected to the printed circuit board, another of the other with the printed circuit board And a flexible printed circuit board as the electric board .

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view showing a printed circuit board mounting structure of the camera when the camera body is viewed from the back side, and FIG. 2 is a side sectional view showing the printed circuit board mounting structure of the camera when the camera body is viewed from the side.

As shown in FIGS. 1 and 2, the rigid printed circuit board 1 is provided on the back side of the camera body 5 and has a substantially rectangular area substantially corresponding to the back surface of the body 5. A wide mountable surface portion is provided on the printed circuit board 1. The rigid printed circuit board 1 includes a flexible printed circuit board 2 disposed so as to be mountable along the upper surface of the camera body 5 including an upper surface of a pentaprism (not shown), and a component mounter along the lower surface of the camera body 5. A flexible printed circuit board 3 arranged so as to be able to be mounted, a flexible printed circuit board 4 arranged so as to be able to mount components along a side surface of a mirror box (not shown), and a contact contact 6 and a connector 8, which are electric conduction means, respectively. 9 are electrically connected.

That is, the flexible printed circuit boards 2, 3, and 4 are provided with convex portions 2a,
3a and 4a are protruded from the respective component mountable surface portions toward the camera back surface, and are bent substantially 90 degrees toward the substrate 1 so as to overlap with a pair of contact portions on the rigid printed circuit board 1. I have. The flexible printed circuit boards 2 and 3 have connector connecting portions 2b and 3b protruding toward the back of the camera, and are bent toward the connectors 8 and 9 on the hard printed circuit board 1 to be electrically connected. Have been.

When the printed circuit board mounting structure of the camera of the first embodiment is applied to a camera, a part of the outer wall of the camera facing the patrone chamber is opened to load the film patrone, and the patrone is dropped. A so-called drop-in camera is the most desirable.
However, the camera is not limited to the drop-in type camera. For example, if a means for connecting a hard printed board and a flexible printed board with contact contacts is adopted, a film cartridge is opened and closed by opening and closing a so-called front face of a back cover behind the camera. It is also possible to apply to a conventional camera loaded with.

According to the first embodiment, an inexpensive hard printed circuit board having a component mounting surface portion with a large area is effectively used by effectively using a wide plane area where a back cover is provided in a conventional camera. By arranging 1, the space can be effectively used, and the mounting efficiency can be improved. In addition, since the flexible printed circuit board can be connected by wiring with a small number of bendings, workability is improved, and cost is improved. Can be down. Further, since the connection is performed using a connector or the like, the connection work of each substrate is further facilitated.

FIGS. 3 and 4 show a second embodiment of the present invention. FIG. 3 is a perspective view showing a printed circuit board mounting structure of the camera when the camera body is viewed from the back side, and FIG. 4 is a view showing a stacked state of the respective substrates when the camera is cut along the cutting line A in FIG. FIG. This second
Since the embodiment is almost the same as the above-described first embodiment, only different portions will be mainly described.

As shown in FIGS. 3 and 4, in the second embodiment, a hard printed circuit board 10 having a large mounting area on both sides is provided between a back plate member 19 and a back cover member 21. It is located in the space.

That is, the hard printed circuit board 1 having a large mounting area is provided on a rear surface of the camera body 5 which does not affect a mechanical space for loading and unloading the film cartridge from the camera rear side to the camera.
0 is provided. On both surfaces of the hard printed circuit board 10, main electric components 10a and 10b constituting a circuit provided in the camera are mounted at high density. The hard printed board 10 is a hard printed board having two pattern layers in order to realize a high-density wiring pattern.

A finder CPU, various switches, dials, and the like (not shown) provided along the upper surface of the camera body 5 including the upper surface of the pentaprism (not shown) are arranged on the rigid printed circuit board 10. A flexible printed circuit board 11 provided, a flexible printed circuit board 12 disposed on the flexible printed circuit board 11 and connected to an external display device (not shown), and a lower surface of the camera body 5. And is connected to a flexible printed circuit board 13 on which wiring, electrical components and the like to a plurality of motors (not shown) are provided.

That is, the plurality of flexible printed boards 11, 12, and 13 are connected to the connector connecting portions 11a, 11b, and 1 from the surface on which various electric components are mounted.
2a and 13a are extended toward the back surface of the camera, and are bent so as to be substantially parallel to the component mounting surface portion of the hard printed board 10. Then, connectors 15a and 15b of the hard printed board 10 having a known configuration are provided. , 15c, and 15d, respectively.

Further, a rigid printed circuit board 14 for power supply control, which is disposed on the same lower surface of the camera body 5 as the flexible printed circuit board 13, is connected to the rigid printed circuit board 10. That is, the rigid printed board 14 is
One end of a known flexible printed circuit board 14a having a structure sufficient for the electrical connection between the two rigid printed circuit boards 10 and 14 is connected to the two rigid printed circuit boards 10 and 14 for electrical connection. The other end of the relay flexible printed board 14a is connected to the rigid printed board 1
0 is connected to the connector 15c.

Reference numerals 16a and 16b shown in FIG. 4 in the cross section of the camera taken along section line A in FIG.
Shows a part of the camera body 5 which is divided into upper and lower parts. A film 17 is stretched behind the optical axes of the camera bodies 16a and 16b so as to be movable along film rail surfaces 16c and 16d formed on the camera bodies 16a and 16b. A film crimping plate 18 is provided behind this, and the film 17 is crimped to the film rail surfaces 16c and 16d while maintaining flatness.

This film pressure bonding plate 18 is
Is held elastically. The back plate member 19 is assembled integrally with the camera bodies 16a and 16b at a portion (not shown). Behind the back plate member 19, the rigid printed board 10
A back cover member 21 serving as an exterior of the camera is provided with the camera body 5 interposed therebetween, and is assembled integrally with the camera body 5 at a portion (not shown).

According to the second embodiment, even if a space for loading and unloading a film cartridge (not shown) from the back side of the camera is secured, high-density component mounting is possible and the mounting area is large. The rigid printed circuit board can be disposed on the back surface of the camera body 5, and the mounting efficiency of the electric components is greatly improved. Each of the substrates 1
Since the connection of 0, 11, 12, 13, and 14 is performed via the connector, these connection operations are facilitated and the operation efficiency can be improved.

In the second embodiment, the hard printed circuit board 10 has two pattern layers.
It is needless to say that the mounting efficiency is not limited to two or more layers, and that the mounting efficiency of the electric component is further improved when two or more layers are formed.

FIG. 5 shows a third embodiment of the present invention, and is a perspective view of a camera in which a finder unit including a pentaprism (not shown) can be detachably detached. Since the third embodiment is almost the same as the first and second embodiments, only different portions will be mainly described.

As shown in FIG.
Has a large mounting area, is disposed on the back surface of the camera body 5 and does not affect the mechanical space for loading and unloading the film cartridge from the back side of the camera to the camera. .

A hard printed circuit board 26 is mounted on the side of the rear surface of the camera, which is the same space as the area where the hard printed circuit board 22 is disposed, on the side that does not hinder the passage of the patrone. And the component mounting surface is
The hard printed circuit board 22 is disposed so as to be substantially parallel to the component mounting surface. The connector 26a of the hard printed board 26 and the connector 22a of the hard printed board 22 are electrically connected via a relay flexible printed board 27.

The hard printed circuit board 22 has mounting surfaces on both sides, and main electric components (not shown) are provided. On the other hand, the hard printed circuit board 26 is characterized in that only the surface facing the back side of the camera is a mounting surface portion, and electric components are provided only on this surface.

With respect to such a hard printed board 22 and a hard printed board 26, the upper surface of the camera body 5 divided into right and left by a finder unit mounting portion is along the right side when viewed from the back side of the camera. Printed circuit board 23 which is mounted so that components can be mounted thereon, and a flexible printed board which can be mounted so that components can be mounted along the left side of the upper surface of the camera body 5 when viewed from the back side of the camera. The board 24 and the flexible printed circuit board 25 arranged so as to be able to mount components along the lower surface of the camera body 5 form a well-known electric connection means as shown in the first and second embodiments. Connected through.

That is, connectors 22b and 26b are provided on the hard printed boards 22 and 26, respectively.
The two connector connecting portions 23a and 23b extending from the flexible printed circuit board 23 are
After being bent toward b and 26b, they are electrically connected.

The flexible printed circuit board 24
The connecting portion 2 is formed in a substantially rectangular shape so as not to disturb the passage of the film cartridge and extends.
4 a are superimposed on corresponding portions of the rigid printed circuit board 22 and are electrically connected by the contact contacts 28.

Further, the flexible printed circuit board 2
From 5, the connecting portion 25a extends and is bent, and the electrical contact at the tip end thereof and the electrical contact to be connected to the hard printed circuit board 22 are electrically connected by a solder bridge contact 29 having a known configuration.

In the third embodiment, unlike the first and second embodiments, the rigid printed circuit board disposed on the back surface area of the camera body 5 is divided into at least two instead of one. . In other words, at least one board has electrical components mounted on both sides, and at least one board has electrical components mounted on only one side, and electrical components having a high component height are mounted on a single-sided board. However, by placing other electrical components that are not high on a double-sided board,
The space in the height direction where the hard printed board 22 and the hard printed board 26 are disposed is effectively used.

According to the third embodiment, substantially the same effects as those of the first and second embodiments can be obtained, and the rigid printed circuit board provided on the back surface area of the camera body 5 is divided into a plurality of parts. By mounting electrical components on at least one hard printed board on one side and at least one other hard printed board on both sides, the volume of the area where the hard printed board is disposed is reduced, and the space in the camera is reduced. Can be used effectively.

[0035]

Further, the present invention can be applied to the case where the substrate has a more complicated shape than the shape of each substrate shown in each of the above embodiments. In addition, in each of the embodiments described above, the embodiment in the single-lens reflex camera has been described.
The present invention is not limited to this, and it is needless to say that the present invention can be applied to a substrate configuration of a compact camera or the like.

[0037]

As described above, according to the present invention, it is possible to provide a printed circuit board mounting structure of a camera which is inexpensive, has good workability, and has a large mounting area.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a printed circuit board mounting structure of a camera when a camera body is viewed from a back side according to a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a printed circuit board mounting structure of the camera when the camera body is viewed from a side according to the first embodiment.

FIG. 3 is a perspective view showing a printed circuit board mounting structure of the camera when the camera body is viewed from the back side according to the second embodiment of the present invention.

FIG. 4 is a partial cross-sectional view showing a stacked state of each substrate when the camera is cut in the optical axis direction along the cutting line A in FIG. 3 according to the second embodiment.

FIG. 5 is a perspective view showing a printed circuit board mounting structure of the camera when the camera body is viewed from the back side according to the third embodiment of the present invention.

[Explanation of symbols]

1, 10, 22, 26: rigid printed circuit board 2, 3, 4, 11, 12, 13, 23, 24, 25: flexible printed circuit board 5: camera body 14: rigid printed circuit board for power control 21: back cover member ( Exterior member that forms the rear surface of the camera body)

Claims (1)

(57) [Claims] Claims: 1. A camera is provided on the back of a camera body.
Electrical components of the camera are mounted, and flop <br/> PC board to which the connector components for performing other electrical substrate and conductive <br/> air connection is mounted on the surface, other than the above back surface of the camera body of provided on at least one surface of the other aspects, the flexible Bryn bets the printed with the connector parts <br/> a contact portion to be electrically connected to the substrate, which is another of the other circuit board and the printed circuit board A printed circuit board mounting structure for a camera, comprising: a substrate.