JP3639427B2 - Battery case - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery case that is molded into a cylindrical shape that houses a plurality of batteries, and that has electrode terminals connected to battery terminals fixed to the bottom.
[0002]
[Prior art]
A battery case containing a plurality of batteries needs to incorporate electrode terminals for connecting terminals of adjacent batteries at the bottom. In the battery case having this structure, the batteries adjacent to each other at the bottom are connected in series or in parallel, and the terminal of the battery that appears in the opening of the battery case is connected to the portable electrical device in which the battery case is mounted.
[0003]
The battery case of this structure can be manufactured by inserting the electrode terminal into plastic and molding it, or by bonding the electrode terminal to the battery case, or by melting part of the battery case and fixing the electrode terminal . However, the battery case in which the electrode terminal is inserted and molded has a drawback that the cost of the molding die is considerably increased. There is also a drawback that the electrode terminals cannot be replaced. Furthermore, the battery case in which the electrode terminals are fixed by a method such as adhesion also has a drawback in that it takes time and labor to manufacture.
[0004]
This drawback can be solved by a structure in which the electrode terminal can be mounted and fixed so as not to come out of the molded battery case. As a battery case for realizing this, the present inventor has developed a battery case having a structure shown in FIG. In this battery case, a set hole 2 for inserting and setting the electrode terminal 1 in the molded case is opened on one side of the bottom. Further, mounting grooves 3 for inserting both ends of the electrode terminal 1 are provided on the inner surface of the battery case. Further, a stopper projection 4 is provided on the bottom plate 6 in order to prevent the electrode terminal 1 from coming out while both ends of the electrode terminal 1 are put in the mounting groove 3.
[0005]
[Problems to be solved by the invention]
The battery case can be fixed in place by inserting electrode terminals after molding with plastic. Therefore, it has the feature that it can be mass-produced at low cost. However, the battery case having this structure has a drawback that it is not possible to easily replace the electrode terminal in which the attached electrode terminal is deformed, the stopper protrusion is crushed, or the contact failure is caused. Such an adverse effect is caused by deforming the electrode terminal so as to exceed the stopper projection when the electrode terminal is set at a predetermined position. If the stopper protrusion is lowered in order to reduce the deformation of the electrode terminal, there is a drawback that the electrode terminal is easily pulled out or displaced easily. In order to prevent this defect, if the stopper protrusion is made high, adverse effects such as deformation of the electrode terminal become significant.
[0006]
The present invention has been developed for the purpose of solving such drawbacks. An important object of the present invention is to provide a battery case that can be reliably set at an accurate position without deforming the electrode terminal and not coming off the electrode terminal.
[0007]
[Means for Solving the Problems]
In the battery case of the present invention, a bottom plate 6 is provided at the bottom of a cylindrical portion 5 formed into a cylindrical shape capable of storing a plurality of batteries 7. The bottom plate 6 is fixing the electrode terminal 1 which connects the terminal of the battery 7 accommodated adjacently.
[0008]
Furthermore, the battery case of claim 1 of the present invention has the following unique configuration.
(A) A set hole 2 for inserting the electrode terminal 1 is provided through one side of the bottom portion of the cylindrical portion 5.
(B) The bottom plate 6 has a sandwiching arm 6A between the batteries 7 accommodated adjacent to each other. The terminal mounting plate 6B is located on both sides of the sandwiching arm 6A at positions facing the terminals of the battery 7. Is provided.
(C) The sandwiching arm 6 </ b> A is provided to extend toward the set hole 2 from one side surface where the set hole 2 is not provided.
(D) The sandwiching arm 6A has elasticity that can be elastically deformed when the electrode terminal 1 is inserted.
(E) The lower surface of the sandwiching arm 6A and the upper surface of the terminal mounting plate 6B are vertically displaced so as to form a gap in which the electrode terminal 1 can be sandwiched.
(F) A stopper projection 4 is provided on the lower surface of the sandwiching arm 6A to prevent the electrode terminal 1 inserted between the sandwiching arm 6A and the terminal mounting plate 6B from coming off.
[0009]
The battery case according to claim 2 of the present invention is provided with elastic bent pieces 1 </ b> A at both ends of the electrode terminal 1. A mounting groove 3 for sandwiching the elastic bent piece 1A is provided in the insertion direction of the electrode terminal 1 from the set hole 2. The electrode terminal 1 is fixed to the bottom plate 6 by inserting the elastic bending piece 1A of the electrode terminal 1 into the mounting groove 3 and elastically pressing the mounting groove 3 with the elastic bending piece 1A.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. However, the example shown below illustrates the battery case for embodying the technical idea of the present invention, and the present invention does not specify the battery case as follows.
[0011]
Further, in this specification, in order to facilitate understanding of the scope of claims, the numbers corresponding to the members shown in the examples are referred to as “the scope of claims” and “the means for solving the problems”. It is added to the member shown by. However, the members shown in the claims are not limited to the members in the embodiments.
[0012]
The battery case shown in FIG. 2 is used for an electric razor that is a portable electric device 8, as shown in FIG. However, FIG. 2 illustrates the surface side of the battery case, and FIG. 3 illustrates the back side of the battery case. The battery case shown in these drawings is used by being detachably connected to an electric razor which is a portable electric device 8.
[0013]
This battery case is made of plastic, and the cylindrical portion 5 and the bottom plate 6 are integrally formed. The cylindrical part 5 is formed in an elliptical cylindrical shape that can store two batteries. However, although not shown, the cylindrical portion can be formed into a cylindrical shape that can store three or more batteries. The bottom plate 6 is provided at the bottom of the cylindrical portion 5, and the electrode terminal 1 that connects the terminal of the battery stored adjacent to the bottom plate 6 is fixed to the bottom plate 6.
[0014]
The opening at the upper end of the cylindrical portion 5 opens at a position facing the connecting hole 9 connected to the portable electrical device 8. The portable electric device 8 is provided with a protrusion 10 that is inserted into the connection hole 9 of the battery case so as to protrude from the insertion portion below the electric razor. The battery case having this structure can be connected so that it does not come off by inserting the upper end into the insertion part of the portable electric device 8 and then rotating it slightly to guide the convex part 10 into the connection hole 9.
[0015]
FIG. 4 is a perspective view of the bottom of the battery case, and FIGS. 5 and 6 are longitudinal sectional views. The battery case shown in these figures is provided with a set hole 2 penetrating one side of the bottom of the cylindrical portion 5 in order to insert the electrode terminal 1 after being molded. The set hole 2 is substantially equal to the total length of the electrode terminal 1 or is opened slightly longer so that the electrode terminal 1 can be mounted while being translated in the direction indicated by the arrow. The lower end edge of the set hole 2 is flush with the upper surface of the bottom plate 6 so that one side of the bottom plate 6 is opened flat.
[0016]
The bottom plate 6 is provided with a sandwiching arm 6A between two batteries 7 accommodated adjacent to each other, and the terminal mounting plate 6B is provided on both sides of the sandwiching arm 6A at positions facing the terminals of the battery 7. Is provided. The clamping arm 6A is provided with a gap between the terminal mounting plate 6B and the terminal mounting plate 6B so that it can be elastically deformed independently from the terminal mounting plate 6B.
[0017]
Further, as shown by the arrow in FIG. 4, the sandwiching arm 6 </ b> A extends toward the set hole 2 from one side surface where the set hole 2 is not provided in order to attach the electrode terminal 1 from the set hole 2. Is provided. Further, the sandwiching arm 6A has elasticity that can be elastically deformed when the electrode terminal 1 is inserted. In order to elastically deform the sandwiching arm 6A, the battery case is formed of, for example, ABS resin or PME resin. Further, the sandwiching arm 6A is formed thinner than the terminal mounting plate 6B and is formed into a shape that is easily elastically deformed.
[0018]
The electrode terminal 1 is inserted and fixed between the sandwiching arm 6A and the terminal mounting plate 6B. Therefore, the lower surface of the sandwiching arm 6A and the upper surface of the terminal mounting plate 6B are formed so as to be displaced in the vertical direction so as to form a gap in which the electrode terminal 1 can be sandwiched.
[0019]
Further, the sandwiching arm 6A shown in the figure is provided with a stopper projection 4 that projects from the lower surface of the tip portion and prevents the inserted electrode terminal 1 from coming off. The stopper protrusion 4 is in contact with the electrode terminal 1 in a state where the electrode terminal 1 is mounted at a fixed position, and holds the electrode terminal 1 so as not to come out at the fixed position. In the battery case shown in this figure, the stopper projection 4 is provided on the clamping arm 6A, and the electrode terminal 1 is mounted at a fixed position.
[0020]
The electrode terminal 1 is obtained by cutting and bending a metal plate that can be elastically deformed. The electrode terminal 1 is provided with elastic bent pieces 1A at both ends, and a contact piece elastically pressed against the terminal of the battery 7 is provided in the middle. A song is provided. The elastic bent piece 1A is inserted into the mounting groove 3 provided on the inner surface of the battery case, as shown in the sectional view of FIG. The mounting groove 3 is provided extending from the set hole 2 in the insertion direction of the electrode terminal 1. This is because the electrode terminal 1 inserted from the set hole 2 is slid in the mounting groove 3 and set in a fixed position. Furthermore, the mounting groove 3 is formed in a width that is elastically pressed by the elastic bent piece 1A in a state in which the elastic bent piece 1A of the electrode terminal 1 is inserted. The electrode terminal 1 having this structure is mounted so as not to move by pressing the mounting groove 3 with the elastic bent piece 1A, and is further prevented from coming off with the stopper projection 4, so that it is securely held in place. .
[0021]
The electrode terminal 1 shown in FIG. 4 is provided with a notch 11 at a portion for guiding the stopper protrusion 4. As shown in FIG. 7, the notch 11 guides the stopper projection 4 of the electrode terminal 1 mounted at a fixed position. This structure can also prevent the lateral displacement of the electrode terminal 1 by the stopper protrusion 4.
[0022]
The battery case having this structure has an advantage that the electrode terminal 1 can be inserted from the set hole 2 and can be easily fixed.
[0023]
Furthermore, since the battery case shown in the figure accommodates two AA cylindrical batteries 7 arranged in parallel, a partition wall 12 is integrated between the two cylindrical batteries 7 as shown in FIG. Molding. Further, the battery case protrudes from the inner surface, and a pair of positioning ribs 13 are integrally formed to hold the battery 7. The positioning rib 13 holds the cylindrical battery 7 at a fixed position, and the battery case shown in the figure accommodates the cylindrical battery 7 at a fixed position of the battery case by both the partition wall 12 and the positioning rib 13.
[0024]
The positioning rib 13 extends in the longitudinal direction of the cylindrical battery 7 and is provided in the battery case. Further, the positioning ribs 13 are formed in a plate shape thinner than the battery case so that the positioning ribs 13 can be somewhat deformed when pushed by the cylindrical battery 7. The plate-like positioning rib 13 holds the cylindrical battery 7 in a fixed position so as to sandwich the battery 7 on both sides. A pair of positioning ribs 13 are arranged above and below the cylindrical battery 7 in the figure and are held in place so as to be sandwiched between the upper and lower sides.
[0025]
Further, the pair of positioning ribs 13 are disposed at positions shifted from the center of the cylindrical battery 7 so as to sandwich a position eccentric from the center of the cylindrical battery 7. The positioning rib 13 that holds the right cylindrical battery 7 is arranged to be further unevenly distributed to the right side of the center of the right cylindrical battery 7, and the positioning rib 13 that holds the left cylindrical battery 7 is The cylindrical battery 7 is arranged so as to be unevenly distributed on the left side from the center.
[0026]
Furthermore, the positioning ribs 13 are inclined with respect to the radial direction of the cylindrical battery 7 so as to be easily deformed when pushed by the cylindrical battery 7. The inclination angle α of the positioning rib 13 shown in FIG. 8 with respect to the radial direction of the cylindrical battery 7 is about 45 degrees. The positioning rib 13 is more likely to be deformed as the tilt angle α is smaller and closer to the radial direction of the cylindrical battery 7 and is more difficult to be deformed. The inclination angle α is preferably 30 to 70 degrees, and more preferably 30 to 60 degrees, for example, considering the thickness and height of the positioning ribs 13.
[0027]
【The invention's effect】
The battery case of the present invention has a feature that it can be reliably set at an accurate position without deforming the electrode terminal and not coming off the electrode terminal. That is, the battery case of the present invention has a set hole for inserting an electrode terminal on one side of the bottom portion of the cylindrical portion, and the sandwich plate arm provided on the bottom of the cylindrical portion can be elastically deformed with a clamping arm. A terminal mounting plate is provided on both sides of the sandwiching arm, and the electrode terminal is sandwiched and fixed between the sandwiching arm and the terminal mounting plate, and the sandwiching arm and the terminal mounting plate have a clearance for sandwiching the electrode terminal. This is because they are provided so as to be displaced in the vertical direction so that a stopper protrusion for preventing the electrode terminal from coming off is provided on the lower surface of the sandwiching arm.
[0028]
The battery case having this structure can be inserted into the gap between the sandwiching arm and the terminal mounting arm by elastically deforming the sandwiching arm when the electrode terminal is mounted on the bottom plate. For this reason, this battery case can be mounted or replaced very easily without deforming the electrode terminal even if the stopper protrusion is formed high. That is, the battery case of the present invention can realize the mutually contradicting characteristics of mounting the electrode terminal without deforming and increasing the stopper protrusion, which are problems of the conventional battery case, with a very simple structure. . As described above, the battery case of the present invention in which the stopper protrusion can be made high has a feature that the electrode terminal is hardly pulled out and can be securely held in a fixed position so as not to be displaced.
[0029]
Furthermore, the battery case according to claim 2 of the present invention is provided with elastic bent pieces at both ends of the electrode terminals, and elastic elastic pieces are inserted into the mounting grooves provided in the insertion direction of the electrode terminals from the set holes. The electrode terminal is fixed to the bottom plate by elastically pressing the mounting groove with the bent piece. For this reason, this battery case has a synergistic effect that the electrode terminal is prevented from being pulled out by the stopper projection and that the mounting groove is pressed by the elastic bent piece to prevent the electrode terminal from moving. It has the feature that it can be held more securely at the correct position.
[Brief description of the drawings]
1 is a perspective view showing a bottom portion of a conventional battery case. FIG. 2 is a perspective view showing a battery case according to an embodiment of the present invention. FIG. 3 is a state in which the battery case shown in FIG. 4 is an enlarged perspective view showing the bottom of the battery case shown in FIG. 2. FIG. 5 is a longitudinal sectional view of the battery case shown in FIG. 2. FIG. 6 is a longitudinal sectional view of the battery case shown in FIG. 7] Bottom view of the battery case shown in FIG. 2. [FIG. 8] Plan view of the battery case shown in FIG.
DESCRIPTION OF SYMBOLS 1 ... Electrode terminal 1A ... Elastic bending piece 2 ... Set hole 3 ... Mounting groove 4 ... Stopper protrusion 5 ... Cylindrical part 6 ... Bottom plate 6A ... Clamping arm 6B ... Terminal mounting plate 7 ... Battery 8 ... Portable electric equipment 9 ... Connecting hole 10 ... convex 11 ... notch 12 ... partition 13 ... positioning rib

Claims (2)

A bottom plate (6) is provided at the bottom of the cylindrical portion (5) formed into a cylindrical shape capable of storing a plurality of batteries (7), and is stored adjacent to the bottom plate (6). A battery case in which an electrode terminal (1) for connecting terminals of a battery (7) is fixed, and has all the following configurations.
(A) A set hole (2) for inserting the electrode terminal (1) is provided through one side of the bottom portion of the cylindrical portion (5).
(B) The bottom plate (6) has a sandwiching arm (6A) between the batteries (7) stored adjacent to each other, on both sides of the sandwiching arm (6A), A terminal mounting plate (6B) is provided at a position facing the terminal.
(C) The sandwiching arm (6A) is provided extending from one side surface not provided with the set hole (2) toward the set hole (2).
(D) The clamping arm (6A) has elasticity that can be elastically deformed when the electrode terminal (1) is inserted.
(E) The lower surface of the sandwiching arm (6A) and the upper surface of the terminal mounting plate (6B) are vertically displaced so as to create a gap for sandwiching the electrode terminal (1).
(F) A stopper projection (4) is provided on the lower surface of the clamping arm (6A) to prevent the electrode terminal (1) inserted between the clamping arm (6A) and the terminal mounting plate (6B) from coming off. Provided. The electrode terminal (1) has elastic bent pieces (1A) at both ends, and the mounting groove (3) for sandwiching the elastic bent pieces (1A) extends from the set hole (2) to the electrode terminal (1). The elastic bent piece (1A) of the electrode terminal (1) is inserted into the mounting groove (3), and the elastic bent piece (1A) elastically moves the mounting groove (3). The battery case according to claim 1, wherein the battery case is pressed.

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