JPH08114829A - External power source device for camera - Google Patents

Abstract

PURPOSE: To prevent negative polarities or positive polarities of batteries from conducting each other with a simple constitution even when the batteries are inserted inversely and to easily hold rigidity of a battery room by constituting an external power source device so that a cap is held between a camera and an external power source case when the external power source device is attached to the camera. CONSTITUTION: A case main body 1 is connected to a contact guide 2 on which contact 5 for electrically connecting to the camera is arranged. Then, when the batteries are inserted into the case main body 1, and the cap 3 is attached to the case main body 1, and the main body 1 is attached to the bottom surface of the camera with a screw 4 to be used as the external power source device. At this time, the cap 3 is constituted so as to be held between the camera and the case main body 1. The cap 3 covers the battery room 13 so that dust and waterdrop do not enter the battery room 13. Further, the cap 3 has play for the case main body 1 as an attaching margin in the case of only external power source device, but has not play in the state when it is attached to the camera.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external power supply device for a camera that is integrally attached to the bottom surface of the camera.

[0002]

2. Description of the Related Art FIGS. 6 and 7 are perspective views of an external power supply unit for a camera which is integrally attached to the bottom surface of a conventional camera. In FIG. 6, the battery magazine 31 is housed in the battery case portion 30 a in which the reinforcing plate 32 is inserted inside the external power supply body 30. Further, in FIG. 7, a battery 41 is housed inside the external power supply device 40. The conventional external power supply device is configured such that the battery can be taken in and out from the side surface as shown in FIGS. 6 and 7, and the battery can be replaced even when mounted on the camera.

[0003]

However, the above-mentioned FIG.
In the configuration, the operability of attaching and detaching the battery is good, but since the battery is directly inserted and the positive electrode and the negative electrode of the battery are directly conducted, when the battery is inserted in the reverse direction, the negative electrode and the negative electrode of the battery,
Alternatively, the structure lacks a structure for preventing conduction between the positive electrode and the positive electrode, resulting in lack of safety.

In order to completely prevent conduction between the negative electrode and the negative electrode or between the positive electrode and the positive electrode of the battery when the battery is inserted in the opposite direction, it is necessary to store the batteries in separate compartments to reduce the size of the external power supply device. It was considered disadvantageous and could increase costs.

In the configuration shown in FIG. 6, Japanese Utility Model Publication No. 4-54690 is proposed as a structure for completely preventing conduction between the negative electrode and the negative electrode or between the positive electrode and the positive electrode of the battery when the battery is inserted upside down. However, the battery magazine 31 for holding the batteries is still required, resulting in an increase in cost. When using the battery magazine 31, the battery case portion 30a of the external power source body into which the battery magazine 31 is inserted.
Becomes a hollow and becomes weak in strength. Therefore, in order to maintain the strength and suppress the size of the entire battery case portion, the wall thickness is reduced, and the metallic reinforcing plate 32 as shown in FIG. 6 is attached to the battery case portion 30a. The cost was increased because the strength was secured by arranging it inside the and attaching it with screws.

The present invention has been made to solve the above problems, and has a simple structure in which the negative electrode and the negative electrode of the battery or the positive electrode and the positive electrode of the battery are not electrically connected even when the battery is inserted in the reverse direction, and An object of the present invention is to provide an external power supply device for a camera that can easily maintain the rigidity of a battery chamber.

[0007]

In order to achieve the above object, an external power supply device for a camera according to the present invention is an external power supply device for a camera which is integrally attached to a bottom surface of the camera.
The mounting member includes a battery housing portion that houses a battery that is a power source, a contact portion that is electrically connected to the camera, a lid that covers an upper portion of the battery housing portion, and a mounting member that mounts an external power supply device to the camera. Is rotatably attached to the battery housing, and the lid is sandwiched between the camera and the battery housing when an external power supply device is attached to the camera.

[0008]

According to the present invention, the structure for completely preventing conduction between the negative electrode and the negative electrode or between the positive electrode and the positive electrode of the battery when the battery is inserted upside down is simplified, and the rigidity of the battery chamber is improved. It will be easier to secure, and rattling after mounting on the camera will be suppressed.

[0009]

1 to 5 show an embodiment of the present invention.
In FIG. 2, 1 is a case body in which a battery chamber 13 for accommodating a battery (not shown) is formed, 2 is a contact guide in which contacts 5 for electrically connecting with a camera 21 are arranged, and 3 is a case. A lid 4 that covers the battery chamber 13 of the main body 1 from above and is removable from the case main body 1 is a fastening screw that is rotatably attached to the case main body 1 and for attaching an external power supply device to the camera 21. The case body 1 and the contact guide 2 are joined together. FIG. 1 shows a state in which the lid 3 is attached to the case body 1. A battery is put in the case body 1 and the lid 3 is attached.

As shown in FIG. 2, this can be attached to the bottom surface of the camera 21 with the tightening screw 4 and used as an external power supply device. At this time, the lid 3 is sandwiched between the camera 21 and the case body 1. The lid 3 covers the battery chamber 13 so that dust and water droplets do not enter the battery chamber 13 from the outside. Further, when the lid 3 is a single external power supply device, there is rattling as a mounting margin with respect to the case body 1, but when the lid 3 is mounted on the camera 21, the rattling disappears.

FIG. 3 is a top view of the external power supply unit with the lid 3 removed, and 6 is a battery contact piece A for electrically connecting the battery, and 7 is an electrical connection for the battery. Battery contacts B, 8 for connecting the batteries are connected to the battery C, 9 is for connecting the batteries electrically, D is for connecting the batteries D, 1
Reference numeral 0 is a battery contact piece E for electrically connecting the battery, 12 is a rib for receiving the lid 3, 12a is a positioning dowel for determining the position of the lid 3, and 13 is a battery chamber for accommodating the battery. Yes Batteries are stored individually. 14 is a battery contact piece C8
Also, a battery contact piece D9 is attached to partition the battery chamber 13, and at the same time, it is a contact piece receiver that also serves to reinforce the battery chamber 13. When the battery is put into the battery chamber 13, the battery is connected in series by the battery contact piece. The body case 1 secures the strength by the ribs 12 and the contact piece receivers 14.

FIG. 4 is an enlarged view of the contact piece D9 portion. (A) and (A) show a state in which the battery 20 is inserted in the opposite direction,
(C) and (D) show the state in which the battery 20 is inserted in the normal direction, and 11 indicates the contact piece D9 when the battery 20 is inserted in the opposite direction.
Is a protrusion (hereinafter referred to as a reverse insertion prevention wall 11) for preventing the positive side 9a of the battery and the negative electrode terminal 20b of the battery from being electrically connected, and a reverse voltage is applied to the camera when the battery 20 is inserted in the reverse direction. It is designed to prevent the battery from being charged and prevent the battery from being charged with each other.

Since the battery chamber 13 is designed so that the battery 20 can be inserted from above, the wall 11 and the rib 1 for preventing the reverse insertion are installed.
2. It is easy and inexpensive to provide the contact piece receiver 14 integrally with the case body 1.

FIG. 5 is a sectional view of the battery chamber portion of the external power supply device, 3b is a rib for reinforcing the lid 3, and 15 is an abutting surface of the case body and the lid 3. Regarding the strength of the lid 3, it was possible to secure the strength by forming the lid 3 into a box.
The abutting surface 15 is provided at several places on the outer periphery of the lid 3 and on the rib 3b and is arranged as close as possible to the tightening screw 4 of FIG. 3, and the strength of the external power supply device is enhanced by the reinforcement of the main body case 1. It was realized at a low cost.

[Correspondence between Invention and Embodiment] In the above-mentioned embodiment, the case body 1 in which the battery chamber 13 for accommodating the battery is formed corresponds to the battery storage portion of the present invention, and in the embodiment, The contact guide 2 provided with the contact 5 for electrically connecting to the camera 21 corresponds to the contact portion of the present invention, and is rotatably attached to the case body 1 in the embodiment and is externally attached to the camera 21. The tightening screw 4 for mounting the power supply device corresponds to a mounting member for mounting the external power supply device to the camera of the present invention.

[0016]

As described above, according to the present invention, an external power supply case having a battery storage part for storing a battery as a power source and a contact part for electrically connecting with a camera, and a battery storage part of the external power supply case. The lid that covers the upper part of the camera and the attachment member to the camera are rotatably attached to the external power supply case, and when the external power supply device is attached to the camera, the lid is sandwiched between the camera and the external power supply case. With this configuration, (1) rattling after attachment to the camera can be suppressed. (2) It becomes easy to secure the rigidity of the battery chamber. (3) The negative electrode and the negative electrode of the battery when the battery is inserted in the reverse direction,
Alternatively, the structure for completely preventing conduction between the positive electrode and the positive electrode is simplified.

It is possible to provide the external power supply device which has the above-mentioned effects and is inexpensive and excellent in quality.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state where an external power supply device is opened and a state where the lid is closed according to an embodiment of the present invention.

FIG. 2 is a front view showing a state in which an external power supply device is attached to a camera according to an embodiment of the present invention.

FIG. 3 is a top view showing a state in which the lid of the external power supply device is opened in the embodiment of the present invention.

FIG. 4 is an explanatory view of a conduction preventing structure between the battery and the contact piece when the battery is inserted in the reverse direction in the embodiment of the present invention.

FIG. 5 is a cross-sectional view of a battery chamber with a lid closed according to an embodiment of the present invention.

FIG. 6 is a perspective view of a conventional external power supply device.

FIG. 7 is a perspective view of an external power supply device of a conventional example.

[Explanation of symbols]

 1 Case Main Body 2 Contact Guide 3 Lid 3a Lock Lever 3b Rib 4 Tightening Screw 5 Contact 6 Battery Contact A 7 Battery Contact B 8 Battery Contact C 9 Battery Contact D 9a Battery Contact D Plus Side 10 Battery Contact E 11 Countermeasure wall 12 Rib 12a Positioning dowel 13 Battery chamber 14 Contact piece receiver 15 Abutting surface 20 Battery 20a Battery positive side terminal 20b Battery negative side terminal 21 Camera 30 External power supply body 30a Battery case part 31 Battery magazine 32 Reinforcement plate 40 External power supply device 41 Battery

Claims (1)

[Claims] 1. An external power supply device for a camera, which is integrally mounted on a bottom surface of a camera, wherein a battery storage unit for storing a battery serving as a power supply, a contact unit electrically connected to the camera, and an upper portion of the battery storage unit. And a mounting member for mounting an external power supply device to the camera. The mounting member is rotatably attached to the battery housing, and when the external power supply device is mounted on the camera, the lid covers the camera and the battery. An external power supply device for a camera, characterized in that it is sandwiched between storage parts.