JPS636738Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a battery case with a connector for a camera.

In recent years, most cameras incorporate electronics, and the exposure control mechanism has gradually shifted from mechanical control to electrical control using semiconductors (eg, integrated circuits, transistors), and the like. Electronic components including these semiconductors are generally mounted on printed circuit boards, and flexible printed circuit boards are the mainstream.

In addition, a power source is required to perform exposure control etc. using semiconductor elements, and this requires G-13 or 4G
A silver battery called -13 is often used.This silver battery is generally stored inside the camera, and the storage location is mainly determined from design points and so that it does not interfere with operations during shooting. For this reason, it is often placed at the bottom of the mirror box.

By the way, in order to control exposure using a semiconductor device, information on the subject brightness, film sensitivity, aperture value, and exposure time are required as elements that determine the exposure, and generally the subject brightness is determined by the light conversion element. Also, information such as film sensitivity, aperture value, and exposure time is given by the conversion resistor.

The elements and resistors that are the media for these exposure determining elements are rarely placed in one place inside the camera, and in most cases they are installed separately on the front panel of the camera, on the top of the camera, or near the pentaprism. There is.

In addition to these, there are other things necessary to operate the exposure control circuit, such as a power switch and various switches for timing the operation, but these are also rarely placed in one place within the camera.

The method of connecting the above-mentioned power supply, exposure determination information, various switches, etc. to the printed circuit board on which the exposure control circuit that controls exposure is mounted is as follows.
Conventional methods include soldering to a printed circuit board using lead wires and wiring using a flexible printed circuit board, but the former has problems with reliability during soldering and the difficulty of testing individual circuits, while the latter has problems due to its structure. There are restrictions.

Therefore, connection using a connector can be considered, which is effective in improving reliability and facilitating inspection.

However, as cameras have become smaller in recent years, the space for placing connectors within the camera has become limited.
The main location chosen for its placement is on the side of the mirror box or near the bottom of the mirror box.
Of these two, the latter is more advantageous in terms of ease of inspection after camera assembly, but since the battery case mentioned earlier is often placed at the bottom of the mirror box, it takes up space for the connector. It's not easy.

In this way, placing the battery case at the bottom of the mirror box is advantageous from the viewpoint of camera operation and design, and using a connector and placing it at the bottom of the mirror box is advantageous from the point of view of reliability and ease of inspection. Although this is advantageous, there are some difficulties in terms of space.

In view of the above points, this idea solves the above-mentioned space problem by integrating the battery case and connector by molding.
A battery case with a good connector is provided.

Embodiments of this invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a battery case with a connector showing an embodiment of this invention.

Generally, the power source for a camera is a silver battery, for example.
In particular, one or two units of what is called G-13 are often used, but in this embodiment, a case where two units are used will be explained as an example.

In the figure, reference numeral 1 denotes a battery storage section that stores two silver batteries in series, with the upper side serving as the anode. The anode contact 3 is inserted and fixed into a mounting groove provided in the battery case. This contact 3 has a spring property so as to contact the silver battery with appropriate pressure, and is designed to surely contact the anode of the silver battery. The material of this contact 3 is stainless steel, so there is no fear that it will be damaged by leakage from the silver battery.

Reference numeral 14 denotes a cathode contact (see FIG. 2), which is insert-molded into the battery case and placed below the battery storage section 1. This contact 14 also has a spring property so as to contact the silver battery with an appropriate pressure, so that it surely contacts the cathode of the silver battery. The contact 14 is also made of stainless steel, so there is no risk of damage from leakage from the silver battery.

The anode contact 3 is connected to the terminal of the connector terminal group 5 by a lead wire, and the cathode contact 14 is connected to the terminal of the connector terminal group 5 by the same lead wire.

2 is a connector on the inserted side, and the lower side of the figure is the insertion port. This connector 2 has a board thickness of 0.2
Connector terminal group 5 consisting of multiple conductive pieces (including the aforementioned conductive pieces that serve as terminals) made of gold-plated phosphor bronze, which is often used as electrical contacts of mm.
is insert-molded so that one end thereof is exposed as a group of contact pieces in the insertion opening, and the other end is exposed as shown in the figure.

The connector terminal group 5 has a spring property so as to apply enough pressure to ensure reliable contact with the terminals of the printed circuit board inserted into the insertion opening of the connector 2. It is configured to make reliable contact with the terminals of the board.

In addition, in FIG. 1, as mentioned above, various conversion resistors, various switches, power supplies, etc., which will be described later, are connected to one end of the connector terminal group 5, which is exposed to a length of, for example, 3 mm on the upper side of the connector 2. Connected by soldering.

4 is a mounting base for fixing the battery case to the camera body with screws, and the battery case, connector 2, and mounting base 4 are, for example,
It is integrated by molding with ABS resin.

Figure 2 shows an example of a battery case with a connector that integrates the connector 2 and the battery case by molding into a single-lens reflex camera. It is a battery case.

This figure shows a single-lens reflex camera viewed from the lens side, and 12 is a mirror box for driving a mirror that reflects light that has passed through the lens upward and sends it to a magnifying glass.

Reference numeral 7 denotes an aperture value conversion resistor, which converts the aperture value of the lens of a camera with an open metering type exposure meter into a resistance value and sends the resistance value to the exposure control circuit as exposure calculation information. Reference numeral 8 denotes a film sensitivity and exposure multiple conversion resistor, which converts the film sensitivity and exposure multiple values into resistance values and sends them to the exposure control circuit as exposure calculation information.

Numeral 9 denotes a flexible printed circuit board equipped with a circuit for controlling exposure, which is attached with screws to the side and bottom surfaces of the mirror box 12. One end of this printed circuit board 9 is made into a connector terminal with a plurality of contacts each connected to the exposure control circuit at the same pitch as each conductive piece of the connector terminal group 5 so as to contact the contact pieces exposed in the insertion opening of the connector terminal group 5 insert molded into the connector 2 shown in Fig. 1, and is gold plated to increase the reliability of the contact.

When the terminals of the printed circuit board 9, which have been converted into connector terminals, are inserted into the insertion opening of the connector 2, their respective contacts come into contact with the group of contact pieces in the insertion opening, thereby connecting them to the connector terminal group 5. Various conversion resistors, various switches, and a power source are connected to the exposure control circuit on the printed circuit board 9. In addition, to connect various variable resistors and various switches to the connector terminal group 5, for example, each pair of terminals may be made into a pair and each pair may be connected respectively, or one terminal may be connected to the ground (also used as a terminal). Alternatively, one of each resistor and each switch may be connected to this ground, and the other may be connected to the other respective contacts.

Reference numeral 10 denotes a power switch, which supplies and cuts off power to the above-mentioned exposure control circuit. Incidentally, this power switch 10 includes, for example, a connector terminal group 5.
The exposure control circuit may be connected to a terminal other than the terminal to turn the power on and off on the exposure control circuit side, or the anode contact 3 or cathode contact 14 of the battery compartment 1 may be connected to the terminal. In some cases, it may be connected via this power switch 10 to directly turn on and off the power. 11 is a lead wire that connects the connector terminal group 5 with various conversion resistors, various switches, and a power source; 13 is a silver battery that serves as a power source for the exposure control circuit; 14 is a cathode contact of the silver battery; one end of the contact is a lead. It is connected to the terminals of the connector terminal group 5 by wires.

In this way, the feature of this invention is that the battery case and connector are integrated by molding, and its merits are: (1) By integrating the battery case and connector, they can be installed separately. Space can be used more effectively than usual.

(2) By integrating the connector holder, the connector holder can also be used to hold the battery case, so no space is required for the connector holder.

(3) Group of connector terminals in the connector.
If the terminals are connected to the anode and cathode contacts of the battery case and then insert molded, wiring between the battery and the connector can be omitted.

(4) Integration reduces the number of parts, which is also advantageous in terms of parts management.

(5) Placing a battery case in which the connector is integrally formed by molding at the bottom of the camera's mirror box is very advantageous for inspection after the camera is assembled.

As described above, the provided space can be used effectively and inspection after assembly can be easily performed, so the effect of integrating the battery case and the connector is very large.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of this invention;
FIG. 2 is a diagram showing the actual wiring inside the camera. 1: Battery compartment, 2: Connector, 3: Anode contact, 4: Mounting base, 5: Connector terminal group, 6: Battery case with connector, 7: Aperture conversion resistor, 8: Film sensitivity and exposure multiple conversion resistor ,
9: Flexible printed circuit board, 10: Power switch, 11: Lead wire, 12: Mirror box,
13: battery, 14: cathode contact.

Claims (1)

[Scope of Claim for Utility Model Registration] A printed circuit board equipped with an electric circuit for controlling exposure, etc., various switches provided outside the printed circuit board for determining the operation timing of the electric circuit, and various resistors for controlling exposure determination information, etc. In a camera equipped with each conversion element provided outside the printed circuit board, such as a conversion resistor for converting into a value, etc., one end of the printed circuit board is converted into a connector terminal by a plurality of contacts connected to the electric circuit, respectively, and the connector one end of a plurality of conductive pieces forming a terminal group is exposed as a contact piece group in an insertion opening into which a terminal consisting of a plurality of contacts of the printed circuit board is inserted;
A connector in which the plurality of conductive pieces are insert-molded so that the other ends of the plurality of conductive pieces are exposed to the outside, and a battery case for storing the batteries are integrally formed by molding, and the battery case is integrally formed with the battery case. The various switches and the conversion elements are respectively connected to a plurality of terminals of the group of connector terminals exposed to the outside of the connector, and the terminals that are appropriated as terminals of the group of connector terminals exposed to the outside are integrated with the connector. Connect an anode contact and a cathode contact that contact the anode and cathode, respectively, of a battery housed in a molded battery case, insert a terminal made of a plurality of contacts of the printed circuit board into the insertion opening of the connector, and A battery with a connector for a camera, characterized in that each of the contacts is brought into contact with a group of contact pieces in the insertion opening, thereby connecting the various switches, each of the conversion elements, and the battery to the electric circuit. Case.