JPS62150337A - Camera - Google Patents

Abstract

PURPOSE:To obtain the compact upper part of a camera body without generating an electric noise in a control use IC, by providing an electronic flash light emitting circuit substrate, on the bottom face part of the body part which has been a bead space so far. CONSTITUTION:An electronic flash light emitting circuit substrate 13 is provided between a film chamber 2 of a body part 1 and a film winding chamber 3, and also on the lower part of the center part which has been surrounded by a light shielding wall and a shutter block. A high voltage current flows to only the first connecting line for connecting an electronic flash light emitting part 4 and a trigger transformer 5, and no high voltage current flows to the second connecting line for connecting the trigger transformer 5 and an electric circuit of the electronic flash light emitting circuit substrate 13. Also, from the second connecting line, no electrostatic force is generated, and also the trigger transformer 5 and the first connecting line are shielded against the first substrate 10 ad the second substrate 7 by an electrostatic shielding member 6, and even if a high voltage current flows to the second connecting line and the electrostatic force is generated, the electrostatic force does not work on control use ICs 8, 9 of each substrate 7, 10.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a camera equipped with an electronic flash light emitting unit, and more particularly to an improvement in the arrangement structure of a circuit board for electronic flash light emitting.

Conventionally, as shown in FIGS. 3 and 4, an electronic flash light emitting unit 2G of a camera is provided at one corner of the upper part of the camera body, and an electronic flash light emitting element group 25 is fixed thereto. The circuit board 2.1 is placed in the film chamber 22 inside the main body 21.
The element group 25 on the substrate 24 includes a booster circuit that boosts the voltage from the camera battery to, for example, 300V, and a trigger circuit that causes the electronic flannel light emitting unit to emit light using the boosted voltage. The electronic flash light emitting unit 26 is configured to be connected to an electric circuit connected to the electronic flash light emitting unit 26. Furthermore, since the upper part of the camera body is equipped with not only the electronic flash light emitting unit 26 but also the electronic flash light emitting element group 25, a certain amount of storage space is required in the upper part of the camera body. This was one of the factors preventing downsizing. In FIGS. 3 and 4, 22 is a film winding chamber, 27 is a capacitor for storing the boosted voltage, and 28.31 is a board, and each board 28.31 is equipped with a predetermined electric circuit. and a control IC 29 that controls the electric circuit.
30 etc.

Therefore, as a result of investigating the state of utilization of the space within the camera body, the present applicant found that there is a space that is not effectively utilized, that is, a dead space, at the bottom of the camera body. Therefore, the present invention utilizes the dead space at the bottom of the camera body, and the upper part of the camera body has only an electronic flash light emitting section, while the bottom of the camera body has an electronic flash light emitting element. The electronic flash light emitting circuit board is provided with a fixed group, and the electronic flash light emitting part and the electric circuit of the electronic flash light emitting circuit board are connected to each other, thereby making the upper part of the camera body more compact.

Problems to be Solved by the Invention However, in the above-described structure, the electronic flash light emitting part in the two parts of the camera body body and the electronic flash light trigger part which forms part of the electronic flash light emission circuit in the bottom part of the camera body main body. Since high-voltage current flows through the connecting wire that connects the transformer, electrostatic coupling occurs in the connecting wire, and this electrostatic force generates electrical noise in the control IC on the board provided near the connecting wire. There was a possibility that the control IC would malfunction.

Therefore, an object of the present invention is to solve the above-mentioned problem, and to connect the electronic flash light emitting circuit board on the top of the camera body to the bottom of the camera body without causing malfunctions in the control ICs of other mechanisms. To provide a camera which can be prepared for various types of problems and which can make the upper part of the camera body more compact.

Means for Solving the Problems In order to achieve the above object, the present invention provides a method in which a high voltage current flows through a connection line connecting a trigger transformer forming a part of an electronic flash lighting circuit and an electronic flash lighting unit. Electrostatic force is generated in this connection wire,
Because the electrostatic force causes the control IC to malfunction,
Only the trigger transformer is installed above the film chamber inside the camera body, separate from the circuit board for emitting electronic flash, and the trigger transformer and the connecting wire are shielded with an electrostatic shielding material to prevent electrostatic forces. It is constructed so that it does not act on Ic outside the electrical shielding member. That is, when an electronic flash light emitting part is installed on the upper part of the camera body main body, an electronic flash light emitting part is provided near the electronic flash light emitting part on the upper part of the electronic camera body main body which is connected to the electronic flash light emitting part by a connecting line, An electrostatic shielding member is provided around the trigger transformer for electrostatically shielding the connection wire and the trigger transformer from an electric circuit in the camera body main body, while the electrostatic shielding member is provided around the trigger transformer and is connected to the trigger transformer to shield the electronic circuit. An electronic flash light emitting circuit board constituting an electronic flash light emitting circuit for causing the flash light emitting section to emit light is provided on the bottom surface of the camera body main body.

Effect of the Invention In the above configuration, no high-voltage current flows through the connection line that connects the electric circuit of the electronic flash emission circuit board and the trigger transformer, and no electrostatic force is generated. On the other hand, high-voltage current flows through the connection wire that connects the electronic flash light emitting unit and the trigger transformer, and electrostatic force is generated in the connection wire. The room is shielded with a static lightning shielding member to prevent the electrostatic force from acting outside the shielding member, effectively preventing the influence of the electrostatic force from affecting the control IC of other boards. Prevention Zuro.

Embodiments Below, embodiments of the present invention will be described in detail based on the drawings.

The camera according to this embodiment, as shown in Fig. 1.2,
An electronic flash light emitting unit 4 and a trigger transformer 5 for electronic flash light emission are provided above the film chamber 2 in the camera body main body l, and an electrostatic shielding member 6 is provided on the inner surface of the camera body main body of the trigger transformer 5. Configure it so that it is shielded by

The above-mentioned trigger transformer 5 is connected to an electronic flash unit 4 located above the film chamber inside the camera body.
It is fixed to the rear side of the electronic flash light emitting unit 4 and connected to the electronic flash light emitting unit 4 through a first connection line. When a high voltage current flows from the trigger transformer 5 to this first connection line, the electronic flash light emitting unit 4 is caused to emit light. Equipped with.

This shielding member 6 is connected to the trigger and the camera body.
A rear face 6a that shields the rear part of the transformer 5, an upper face 6b that shields the upper part of the transformer 5, and a left side face 6C that shields the left side of the transformer 5 in FIG. 1 are integrally connected.

This shielding member 6 prevents the first shield from being located at the rear of the main body l and above the film chamber along the vertical direction in FIG.
A first connection for connecting the trigger transformer 5 and the electronic flash light emitting unit 4 to a second board 7 provided on the board 10 and the upper part of the body main body l so as to extend along the horizontal direction in FIG. Control ICs 8 and 9 are fixed to each board 7 and 10 to shield the electrostatic force generated in the wires.
Prevent electrical noise from occurring.

On the other hand, electronic flash light emitting circuit board 13
are film chamber 2 and film winding chamber 3 inside the main body l.
It is provided in the lower central part between the light-shielding wall and the shutter block. Although not specifically shown, a group of electronic flash elements is fixed on this board 13. Specifically, the elements include a booster circuit that boosts the voltage from the camera battery to, for example, 300V, and an electronic flash light emitting unit using the boosted voltage. It has a known configuration including a trigger circuit that causes the light to emit light. The electric circuit of this electronic flash circuit board 13 and the trigger transformer 5 are connected by a second connection line to form an electronic flash emission circuit, but no high voltage current flows through this second connection line.

Note that 11 is a third board provided along the vertical direction with respect to the film chamber 2, and the third board 11 has a control I
Equipped with C+2. Each of the boards 7, 10 and 11 is provided with a predetermined control electric circuit and control IC, although not specifically shown. In addition, in Fig. 2, 15 is a Xe tube forming the main body of the electronic flash light emitting unit;
4 is Electroni, I Kuhraliso. According to the above configuration, the high-voltage current flows only through the first connection line that connects the electronic flash light emitting unit 4 and the trigger transformer 5, No high voltage current flows through the second connection line that connects the electric circuit of the circuit board 13, and no electrostatic force is generated from the second connection line, and the trigger transformer 5 and the first connection line are provided with an electrostatic shielding member. 6, the first substrate 10 and the second substrate 7 are shielded, and a high voltage current flows through the second connection line, generating an electrostatic force. Control IC8,
It does not affect 9 etc.

According to the above embodiment, there is no circuit board for electronic flash light emission on which an electronic flash element is fixed on the upper part of the camera body, and only the trigger transformer 5 is provided, so that the upper part of the camera body can be made more compact.

Further, since no high voltage current flows through the second connection line connecting the trigger transformer 5 and the electric circuit of the electronic flash emission circuit board 13, and no electrostatic force is generated from the second connection line, the film chamber 2 No electrical noise is generated in the control IC 12 on the nearby board 11, and no malfunction occurs. In addition, since the trigger transformer 5 and the first connection line are shielded by the electrostatic shielding member 6, the electrostatic force generated in the first connection line is transferred to the second board 7 at the top of the camera body and the first board lO at the rear of the camera body. The control ICs 8 and 9 of each board 7.10 can be effectively prevented from acting on the
No electrical noise is generated, and no malfunctions occur.

Note that the present invention is not limited to the above embodiments,
It can be implemented in various other ways. For example, the shielding member 6
are not limited to the above-mentioned shape, and in the trigger transformer 5, the substrate 7. Any shape that can shield the portion where electrostatic shielding is required for IO may be used.

Effects of the Invention According to the above configuration, by providing the circuit board for electronic flash emission in the bottom part of the body body, which was conventionally a dead space, the upper part of the camera body body can be
Since there is no circuit board for electronic flash lighting equipped with an electronic flash element, and only a trigger transformer is used, the upper part of the camera body can be made more compact. Also, is there high voltage in the connecting wire that connects the trigger transformer and the electric circuit for electronic flash emission on the circuit board for electronic flash emission? Since the IX current does not flow and no electrostatic force is generated from the connection line, no electrical noise is generated in the control IC on the board located near the connection line, and no malfunction occurs. In addition, since the trigger transformer and the connection wire are shielded with an electrostatic shielding member, the electrostatic force generated in the connection wire connecting the trigger transformer and the electronic flash light emitting unit is shielded by the shielding member, and the trigger transformer and the connection wire are shielded. It is possible to effectively prevent electrostatic force from acting on the control tC of the board located near the control IC.
No electrical noise is generated and no malfunction occurs.

[Brief explanation of drawings]

Fig. 1.2 is a schematic front view with the front cover removed and a schematic plan view with the top cover removed of a camera according to an embodiment of the present invention, respectively, and Fig. 3.4 is a schematic plan view of the camera according to an embodiment of the present invention with the front cover removed. They are a schematic front view of the camera with the front cover removed and a schematic plan view of the camera with the top cover removed. l...Camera body main body, 2...film chamber, 3.
... Film winding chamber, 4... Electronic flash light emitting unit, 5... Trigger transformer, 6... Electrostatic shielding member, 7, 10.11... Board, 8, 9.12
...1cS for control 13...Circuit board for electronic flash light emission, l = 1 Reflector, 15...
Xc tube. Patent applicant Minolta Camera Co., Ltd. agent Patent attorney Aoyama Ao Two idiots Figure 1 Figure 2

Claims (1)

[Claims] (1) An electronic flash light emitting unit (4) is provided on the upper part of the camera body main body (1), and an electronic flash light emitting trigger transformer (5) connected to the electronic flash light emitting unit (4) with a connecting wire is provided as described above. An electrostatic shielding member is provided in the upper part of the camera body main body (1) near the electronic flash light emitting part, and electrostatically shields the connection line and the trigger transformer (5) from the electric circuit inside the camera body main body. (6) is provided around the trigger transformer (5), while an electronic flash light emitting circuit is connected to the trigger transformer (5) and constitutes an electronic flash light emitting circuit that causes the electronic flash light emitting unit (4) to emit light. A camera characterized in that a circuit board (13) is provided on the bottom of the camera body (1).