JP3326740B2 - Battery pack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack which accommodates battery cells and is mounted on a device such as a video camera, and more particularly to a battery pack which can be used inside or outside the device.

[0002]

2. Description of the Related Art In portable equipment such as a video camera, for example, a battery pack containing battery cells is attached to the equipment and used as a power source.

[0003]

However, conventional battery packs can only be installed in a device or mounted outside the device. Since the battery pack side terminals are exposed and attached to the outside of the battery pack in a flat shape, when the battery cell is stored in the battery pack and the user puts it in a bag, etc. There was a danger of contact with metal such as another key, causing a short circuit and generating heat. Further, it was not possible to determine from the appearance whether or not the battery cells were stored in the battery pack. Furthermore, in the case of an external battery pack, a terminal with a spring is provided on the device side, and this spring acts in a direction perpendicular to the mounting direction of the battery pack,
There has been a problem that the mounting cannot be performed smoothly, the contact of the terminals is not stable, and the mounting direction of the battery pack to the device is easily erroneous.

The present invention has been made in view of such circumstances, and can be easily attached to a device by any of a built-in method and an external method, and is a simple and compact device capable of preventing occurrence of a short circuit accident. It is an object of the present invention to provide a battery pack having the following structure.

[0005]

According to a first aspect of the present invention, there is provided a battery pack in which a battery cell is housed and mounted on a device, one end of which is opened only on one end surface.
And engages with a first convex engagement portion provided on the device.
A rear wall having a longitudinal concave groove formed in parallel with the battery pack that was connected to the back wall and the substantially arc shape, the rear wall
At a position furthest from the part, a second convex member provided on the device.
Introductory part to introduce joint part and introduced from introductory part
A concave engagement that engages a second convex engagement portion provided on the device
One end of the concave groove in the back wall portion and the side wall portion having the portion is open
A first end face portion connected to the side wall portion and the back wall portion;
Compatible with equipment terminals arranged in recesses provided on the end face
And a concave groove in the back wall portion facing the first end surface portion.
The other end of which is not open, the second connecting to the side wall portion and the back wall portion
A bottom end facing the back wall and connected to the side wall, the first end face and the second end face, the detection end having a second end face and a detection hole for confirming a battery cell having one end opened at the first end face; A second convex engaging portion of the device and a concave portion of the battery pack.
When the hooks engage, the battery pack
The first end face is located in the
And by and characterized and this <br/> for electrically connecting the device terminal and the terminal.

[0006]

[0007] In the battery pack according to the first aspect, the substantially arc-shaped shape formed on the side wall reduces the storage volume when the battery pack is built in the device, and also prevents reverse insertion of the battery pack. . Since the concave groove formed at the center of the back wall and opened at one end face is engaged with the device in paddle engagement, it is possible to prevent backward and forward insertion. Also, when the battery pack is externally attached to the outside of the device, the concave engagement portion provided on the side wall portion is provided on the device when the first end face portion is attached in a direction in which the battery pack moves relatively to the device. The engagement with the protruding engagement portion prevents the mounting direction from being erroneous. Further, the battery cells housed in the battery pack can be confirmed by the detection holes provided in the bottom wall.

[0008]

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the battery pack according to the present invention will be described below with reference to the drawings.

FIGS. 1 to 7 show the configuration of an embodiment of the present invention. The external shape of the battery pack 1 is formed in a rectangular parallelepiped box shape, and the back wall 2 shown in FIG. 1 is provided with a concave groove 3 at the center in the width direction and parallel to the longitudinal direction.
One end of the concave groove 3 on the attachment direction side indicated by the arrow A is open to the end face portion 12, and the other end is closed. The shoulders 4 on both sides in the width direction of the back wall 2 are formed in an arc-shaped cross section.

On both side walls 5 parallel to the longitudinal direction shown in FIGS. 2 and 3, external claws 6 for engaging with locking pins 25 provided on the side surface of the device 21 (not shown) are provided. Each piece is provided in the shape of a concave groove parallel to the longitudinal direction. An introduction portion 8 that opens to the bottom wall portion 7 is formed in the side wall portion 5 at the tip of the external nail 6, and the locking pin 25 passes through the introduction portion 8 and is fixed to the external nail 6. It is designed to engage inside.

As shown in FIG. 4, a bottom wall 7 provided in parallel with the back wall 2 has a pair of entrances of the above-described four introduction portions 8 on two opposite sides in the longitudinal direction. A detection hole 9 is provided. Another two detection holes 9 are located on the center line in the width direction.
And a lock hole 10 are provided. Then, a battery cell (not shown) housed in the battery pack 1 is confirmed via the detection hole 9, and a lock claw (not shown) of the device 21 is engaged with the lock hole 10 .

As shown in FIGS. 5 and 6, end faces 11 and 12 are provided at both ends in the longitudinal direction of the battery pack 1, respectively. A pair of left and right concave holes 13 is provided on the part 7 side. Also, as shown in FIG.
4 are provided facing each other in the axial direction, and when the terminal 24 on the device 21 side is inserted into the concave hole 13, the terminal 24 is clamped and pressed by the spring 14. At the center in the width direction of the end face portion 12, a concave portion communicating with the concave groove 3 of the back wall portion 2 and the detection hole 9 of the bottom wall portion 7 is formed.

Next, the operation of this embodiment will be described. First, when the battery pack 1 is built in the pack mounting hole 22 provided in the device 21 as shown in FIG. 8, the cross-sectional shape of the pack mounting hole 22 is equal to the cross-sectional shape of the battery pack 1 as shown in FIG. By doing so, the shoulder portion 4 of the battery pack 1 and the R portion on the inner periphery of the pack mounting hole 22 come into paddle contact, so that upside down insertion can be prevented. At this time, the inner volume of the pack mounting hole 22 can be minimized by increasing the radius of curvature R of each of the shoulder portion 4 and the pack mounting hole 22. In addition, the rib 23 provided on the inner peripheral upper part of the pack mounting hole 22 is engaged with the concave groove 3 formed in the back wall part 2 of the battery pack 1, thereby preventing the back and forth reverse insertion. it can. Here, since the external claws 6 do not protrude from the outer periphery of the battery pack 1, they do not interfere with the internal operation. Further, by inserting the battery pack 1 into the pack mounting hole 22, the terminal 24 protruding in the back of the pack mounting hole 22 in parallel with the insertion direction as shown in FIG. It is inserted into the hole 13 and is electrically connected by being clamped by a spring 14 shown in FIG.

When the battery pack 1 is externally attached to the outside of the device 21 as shown in FIG. 11, a locking pin 25 provided on the side of the device 21 is engaged with the external pawl 6 and attached. . At this time, if the length of the introduction portion 8 in the longitudinal direction is increased, the locking pin 25 is easily inserted. In addition, a mounting stroke, which is the length of the external claw 6 in the longitudinal direction, is set to a terminal 26 described later.
By making the stroke longer, the insertion of the terminal 26 can be stabilized. Also, since the battery pack 1 is supported with its longitudinal direction vertical, it is stably supported by the device 21.

As shown in FIG. 12, a pair of terminals 26 are provided vertically at the lower part of the side surface of the device 21, and a pair of concave holes 13 provided in one end surface 12 of the battery pack 1.
Are electrically connected to each other by inserting the terminals 26 therein. At this time, the terminals 26 are clamped by a pair of springs 14 provided in the recessed holes 13 as shown in FIGS. If the spring constants of the pair of springs 14 are different, the stability of the contact can be further ensured. Also, the terminal 26 has an effect of being self-cleaned at the time of attachment and detachment.

According to the present embodiment, one battery pack 1 can be used for both the built-in system and the external system for the device 21. Since the spring 14 which is a terminal on the battery pack 1 side is housed in the concave hole 13,
When carrying the battery cell alone in a state where the battery cells are stored in the battery pack 1, it is possible to prevent the occurrence of a short circuit between the terminals. Further, since the detection hole 9 and the lock hole 10 face the surface on the device 21 side at the time of external attachment, unsightly unevenness does not appear on the appearance side. In addition, the external shape is reduced, and the space for the device can be saved.

Although the battery pack 1 normally accommodates one type of battery cell, by appropriately setting the size of the internal volume, the high-voltage battery cell cells 31 are parallelized as shown in FIGS. The external dimensions can be reduced to a minimum for both the case where two battery cells 32 are housed and the case where five low voltage battery cells 32 are housed as shown in FIGS. 17 to 19.

[0019]

As described above, according to the battery pack of the first aspect, the concave groove is provided on the back wall portion and the concave engaging portion is provided on the side wall portion. Also, it is possible to prevent reverse insertion. Further, when the concave engaging portion is engaged with the convex engaging portion provided on the device, the concave connecting terminal on the first end face and the convex connecting terminal on the device are opposed to each other. Can be prevented. Further, the battery cells housed in the battery pack can be confirmed by the detection holes provided in the bottom wall.

[0020]

[Brief description of the drawings]

FIG. 1 is a rear view showing a configuration of an embodiment of a battery pack according to the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a rear view of FIG. 1;

FIG. 5 is an end view on the side opposite to the mounting direction in FIG. 1;

FIG. 6 is an end view on the mounting direction side in FIG. 1;

FIG. 7 is a sectional view of a concave hole 13 of FIG.

FIG. 8 is an explanatory diagram showing a mounting direction when the battery pack 1 according to the present embodiment is built in a device 21.

FIG. 9 is an explanatory view showing the mounting structure of FIG. 8;

FIG. 10 is an explanatory view showing a terminal connection structure of FIG. 8;

FIG. 11 shows a battery pack 1 according to the present embodiment
FIG. 4 is an explanatory diagram showing an attachment direction when externally attached to the device.

FIG. 12 is an explanatory view showing a terminal connection structure of FIG. 11;

13 is a cross-sectional view showing a state of the terminal 26 and the concave hole 13 before connecting the terminal of FIG.

FIG. 14 is a cross-sectional view illustrating a state after connection of the terminals in FIG. 13;

FIG. 15 is an explanatory plan view showing a state where two high-voltage battery cells are housed in the battery pack according to the present embodiment.

FIG. 16 is an explanatory end view of FIG. 15;

FIG. 17 is an explanatory plan view showing a state where five low-voltage battery cells are housed in the battery pack according to the present embodiment.

FIG. 18 is an explanatory side view of FIG. 17;

FIG. 19 is an explanatory end view of FIG. 17;

[Explanation of symbols]

1 battery pack, 2 back wall, 3 concave groove, 4
Shoulder, 5 side wall, 6 external nail, 7 bottom wall, 9 detection hole, 10 lock hole, 11 end face,
12 end face part, 13 concave hole, 14 spring, 21
Equipment, 24 terminals, 25 locking pins, 31, 32
Battery cell

Claims (1)

(57) [Claims] 1. A battery pack containing a battery cell and mounted on a device, wherein one end of the battery pack is opened only on one end surface, and the battery pack is engaged with a first convex engaging portion provided on the device. A back wall portion having a concave groove formed in parallel with the longitudinal direction of the battery pack; a back wall portion connected to the back wall portion in a substantially arc shape; and a third wall provided in the device at a position farthest from the back wall portion. And a side wall portion having an introduction portion for introducing the second convex engagement portion, and a concave engagement portion for engaging with the second convex engagement portion provided on the device introduced from the introduction portion. One end of the concave groove of the back wall is open, a first end face connected to the side wall and the back wall, and a device arranged in a recess provided in the first end face. A terminal corresponding to the terminal of the above, and the concave groove of the back wall portion facing the first end face portion. A second end face portion connected to the side wall portion and the back wall portion, the other end of which is not open; and a detection hole for confirming the battery cell having one end open to the first end face portion, wherein the back wall has A bottom wall portion facing the side wall portion, the first end surface portion and the second end surface portion, the second convex engagement portion of the device and the concave engagement portion of the battery pack. When the mating portion is engaged, the first battery pack moves in the direction in which the battery pack moves relative to the device.
A battery pack, wherein an end face portion is arranged to electrically connect a terminal of the device and the terminal to be connected.