JPH0443333A - Arrangement structure of flexible printed wiring board of camera - Google Patents

Abstract

PURPOSE:To eliminate the need for a flexible printed wiring board for connection by providing a main flexible printed wiring board itself with connection parts for various electric components and devices. CONSTITUTION:Part of the main flexible printed wiring board 4 is bent and expanded to in front of a main body cartridge chamber 2a from the gap between the flank of a mirror box 1 and the main body cartridge chamber 2a, and connected to a DX contact piece 5 by a DC contact piece connection part 4a as part of an external signal input means. Further, the upper part of the main flexible printed wiring board is extended to the side of a main body spool chamber 2b beyond a pentagonal prism and part of it is connected to the power supply means of a battery 7 and DC/DC converter 8 by a power source connection part 4b. The lower part 4c of the main flexible printed wiring board 4 is a connection part for a focus detecting device 6, bent and expanded to the reverse surface of the mirror box 1 from the gap between the side wall surface of the mirror box 1 and the side wall surface of the cartridge chamber 2a, and connected to the focus detecting device 6. Consequently, the need for a flexible printed wiring board for connection is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an arrangement structure for a flexible printed wiring board (hereinafter abbreviated as "flexi") in a camera.

[Conventional/Technology] Various functions of cameras are increasing year by year, so they are becoming more electronic.
The number of electrical components and the boards on which they are mounted is increasing.

Electrical components are placed in various positions inside the camera, so when extracting signals from them, you must use flexible cables for connecting the electrical components and connect them to the main circuit board. Therefore, as the number of electrical components increases, the number of flexible boards for connection also increases, and the number of connection points on the main flexible board, where the main circuit is formed, inevitably increases accordingly.

FIG. 4 shows an example of a typical conventional flexible cable arrangement.

In the figure, 1 is the mirror box, 2 is the camera body,
3 is a pentaprism, and the pentaprism 3 is arranged at the top of the mirror box 1. Reference numeral 4 denotes a main frame, and the upper part of the pentaprism 3 is arranged from the cartridge chamber side 2a to the spool chamber side 2b of the main body 2.

5 is a DX contact unit, and a flexible cable 9 for signal extraction
It is connected to the. 6 is a focus detection device, which is connected to the signal extraction board 11. Further, F is a battery, 8 is a DC/DC converter, and these power supply means are connected to a flexible cable 10 for power supply. These connection boards and flexible boards are each connected to the main flexible board 4 by soldering, connectors, or the like.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, as the number of signal lead-out sections increases, the number of connecting flexible boards increases accordingly, and as a result, the number of connections between these connecting flexible boards and the main flexible board increases accordingly. There was a problem that the number of connection points increased.

As is generally known, an increase in the number of parts not only increases the cost, but also increases the number of connection processes, which leads to a decrease in product reliability and an increase in the overall cost of the product, as mentioned above. The conventional example was not necessarily preferable. Therefore, in order to solve this problem, it may be possible to connect multiple connection flexible cables in advance to form a single continuous flexible cable.
In this method, the overhanging portion pulled out to connect the flexible cables results in poor material removal from the flexible cables themselves, so an increase in costs is unavoidable.

An object of the present invention is to solve the above problems and provide a flexible cable arrangement structure that does not require a flexible cable for connection and does not increase costs.

[Means for Solving the Problems] In the present invention, the main flexible plate is arranged in the gap between the side surface of the mirror box and the side surface of the main body patrone chamber, and a part of the main flexible plate is provided with a DX name reading contact piece (DX contact piece). ) and other external signal input means, and bends and deploys the main flexible from the above gap to the front of the main body patrone chamber, DX
A first extension part is connected to the contact piece, and furthermore, a first extension part that extends from the part disposed in the gap to the upper part of the pentaprism and goes over the upper part of the pentaprism is installed on the main body spool chamber side. A second extension part is provided that can be bent and expanded from the part disposed in the gap to the bottom surface of the mirror box and can be connected at the bottom surface of the mirror box, and both of the extension parts form a band around the mirror box. It was structured so that it was surrounded by

[Function] According to the flexible cable arrangement structure of the present invention, since a flexible cable for connection is not required, the manufacturing cost of the camera can be reduced by reducing the number of connection steps and materials.

[Embodiment] The present invention will be described in detail below with reference to FIGS. 1 to 3.

Figures 341 to 3 show examples of the present invention, with Figure 1 being an exploded perspective view thereof, Figure 2 being a schematic diagram as seen from the front of the camera, and Figure 3 showing the external shape of the main flake when it is deployed. FIG.

In the figure, 1 is the mirror box, 2 is the camera body,
3 is a pentaprism, and the pentaprism 3 is arranged at the top of the mirror box 2. Reference numeral 4 denotes a main frame, the main part of which is arranged in the gap between the mirror box 2 and the main cartridge chamber 2a. 5 is DX
This is a contact piece unit and is provided in the front of the main body patrone chamber 2a. 6 is a focus detection device, and 7 is a battery, which are located at the front of the main body spool chamber. Also, 8 is DC/
DCC/formula-ta.

Here, a part of the main flexible board 4 is bent and expanded from the gap between the side surface of the mirror box 1 and the main body cartridge chamber 2a to the front surface of the cartridge chamber 2a, and is connected to a DX contact piece which is a part of the external signal input means. It is connected to the DX contact piece 5 at the portion 4a.

The upper part 4t of 4a is further bent and expanded on the upper surface 2a of the cartridge chamber, and a pattern for reading a signal of a mode setting switch of a camera (not shown), which is another external signal input means, is formed.

In addition, the upper part of the main flexible plate 4 extends beyond the pentaprism to the main body spool chamber 2b, and a part of it extends to the power supply connection part 4b, and connects the battery 7 and the DC/DCC/type-tar 8.
The glue supply is connected to the milk supply. The remaining part is arranged in the gap between the spool chamber 2b and the mirror box 1, and includes an electric circuit unit (not shown) (shutter, motor).
is connected to.

On the other hand, the lower part 4C of the main flexible plate 4 is bent and expanded from the non-point detection group to the lower surface of the mirror box 1, and the focus detection device 6
is connected to. Furthermore, a pin 1 for transmitting an electric signal to a photographing lens (not shown) is provided on the front part of the lower part 4C.
A connecting portion 4e with a is provided.

Even though the main flexible plate 4 is provided with extensions for connection with various electrical parts and devices, its external shape when expanded has a width of W as shown in Fig. 3. It is efficiently contained within a narrow band-like range.

[Effects of the Invention] As explained above, in the present invention, the main flexible is arranged in the gap between the side wall of the mirror box and the side wall of the main cartridge chamber, and a part of the main flexible is provided with a DX signal reading contact piece ( DX contact piece), the main flexible is bent and expanded from the above gap to the front of the main body cartridge chamber, and the D
It is connected to external signal manual means such as an A portion is connected to the power supply means, and a portion is provided that is bent and expanded from the portion disposed in the gap to the bottom surface of the mirror box, and a portion is connected to the focus detection device at the portion. The main flake was constructed so as to surround the mirror box in a band-like manner in the moving part.

Therefore, since connections to various electrical parts and devices can be provided on the main flexible board itself, there is no need to use new flexible boards for connection, and the number of connections between flexible boards can be significantly reduced. At the same time, the main flake itself can be stored in a narrow range indicated by the width W when it is unfolded into two sheets and all the extensions provided for connection have no overhanging parts. An external shape that is extremely advantageous for material removal can be achieved.

[Brief explanation of the drawing]

Figure 1 is a front perspective view showing the arrangement of the flexible printed wiring board with respect to the camera, Figure 2 is a schematic diagram seen from the front,
FIG. 3 is a developed plan view of a main frame ``flexible printed wiring board'', and FIG. 4 is a diagram showing the arrangement of a conventional typical flare A housed in a camera. 1...Mirror box 2...Camera body 3...
Pentaprism 4... Main flexible printed wiring board 2a...
Patrone chamber 2b...Spool chamber 5...DX contact piece 6...Focus detection device 7...Battery 8...D C/DC converter and 4 others Figure Figure Figure Figure

Claims (1)

[Scope of Claims] 1. A flexible printed wiring board having a connecting portion for a DX signal reading contact piece is disposed in a gap between a side wall surface of a mirror box and a side wall surface of a patrone chamber, and 1. An arrangement structure of a flexible printed wiring board in a camera, characterized in that the flexible printed wiring board is arranged so as to be bent and unfolded from the holder and extended to the front of the cartridge chamber. 2. The flexible printed wiring board has a first extension part that extends from the gap over the top of the pentaprism to the main body spool chamber side, and a second extension part that extends from the gap to the lower surface of the mirror box. , a part of the first extension part located on the spool chamber side is provided with a connection part to a power supply means, and a part of the second extension part located on the lower surface of the mirror box is provided with a focus detection device. 2. A flexible printed wiring board arrangement structure in a camera according to claim 1, wherein the flexible printed wiring board is arranged so as to surround the mirror box. .