JPH0322023B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a battery connection mechanism for electronic equipment.

BACKGROUND ART Conventionally, there is a battery connection mechanism as shown in FIG. 1 which has been commonly used in small electronic devices such as electronic desktop calculators (hereinafter referred to as calculators), and will be briefly described below. 1st
In the figure, 1 is a calculator, 2 and 3 are each a calculator 1
An upper case and a lower case that constitute the outer frame of the
Reference numerals 3a and 3b denote battery storage sections provided in the lower case 3, and 4 a detachably attached battery cover that covers the battery storage sections 3a and 3b. The upper case 2, the lower case 3, and the battery cover 4 are each made of molded plastic, and various electronic parts for configuring the functions of the calculator are housed inside these parts. Needless to say. 5
is a printed wiring board on which electronic components such as the arithmetic element LSI of the calculator 1 are mounted, and is fixed to the upper case 2 with screws 6. Batteries 7 and 8, such as mercury batteries, supply power to the electronic components on the printed wiring board 5, and are housed in the battery storage sections 3a and 3b, respectively, and are connected to the printed wiring board via the battery contacts described below. It is electrically connected to the wiring board 5. Reference numerals 9 and 11 are contact members made of a conductor such as a metal elastic body, and 10 is a short-circuit contact member made of the same material. The contact member 9 has one end connected to the battery 8.
The other end is connected to and fixed on the printed wiring board 5 by elastic pressing with the positive electrode. The short-circuit contact member 10 has one end connected to the positive electrode of the battery 7 through elastic pressure, and the other end connected to the positive electrode of the battery 8.
It is fixed to the upper case 2 or the lower case 3 through contact conduction with the negative electrode by elastic pressing. Therefore, batteries 7 and 8 are connected in series by this short-circuit contact member. The contact member 11 has one end connected to the battery 7.
The other end is connected and fixed on the printed wiring board 5, and the other end is connected and fixed to the printed wiring board 5 by elastic pressure.

In the conventional battery connection mechanism configured as described above, it is necessary to use a relatively expensive metal material with good spring elasticity so that all of the contact members 9, 10, and 11 can make stable electrical contact. In addition, it is necessary to perform heat treatment to remove internal stress generated during bending of the contact. Furthermore, the battery cover 3, which is a component for sealing the openings of the battery compartments 3a and 3b, is structurally essential and increases the number of parts. When replacing the battery, the locking structure must be such that it can be easily attached to and removed from the lower case 3, resulting in a complicated shape. In order to receive opposing forces, it is necessary to consider sufficient mechanical strength, including the locking structure to the case. Furthermore, when replacing the battery, after inserting a new battery, it is necessary to insert and lock the battery cover 3 into the case while pressing the battery cover 3 against the battery with a force that counters the pressure of the contact member, making it difficult to operate easily. I have a problem.

The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to be able to reduce the number of parts through a simple configuration, use inexpensive materials that require fewer processing steps, and improve assembly. It is an object of the present invention to provide a battery connection mechanism for electronic equipment that facilitates work and also enables cost reduction of the product.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a cross-sectional view showing a battery connection mechanism according to an embodiment of the present invention, in which 12 is a small electronic device such as a calculator (hereinafter referred to as the device), and 13 and 14 are plastics constituting the outer frame of the device 1, respectively. An upper case and a lower case are made of molded products and are separably locked to each other. The internal space formed by the upper case 13 and the lower case 14 includes battery storage sections 15a and 15 surrounded by a plurality of walls 11C extending inward from the upper case 13.
b is provided, and batteries 7 and 8 are housed therein. Note that 16 is a printed wiring board on which electronic components of the device 12 are mounted, and is fixed to the upper case 13 with screws 17. Reference numerals 18 and 19 designate contact members made of a conductor. One end of the contact member 18 is connected and fixed on the printed wiring board 16, and the other end is located in the battery storage portion 15b so as to be in contact with the positive electrode of the battery 8. Also, the contact member 19
One end is similarly connected and fixed onto the printed wiring board 16, and the other end is located in the battery storage portion 15a so as to be in contact with the negative electrode of the battery 7. still. The contact members 18 and 19 are connected to the wall 1, respectively.
It extends into the battery housing parts 15a and 15b through a notch provided in a part of the battery housing 3C. Reference numeral 20 denotes a short-circuit contact member made of a conductive material such as a metal elastic body, and is positioned and locked on the lower case 14. This short circuit contact member 20 has a pair of spring parts 20a and 20b.
Of these, the spring portion 20a has elastic pressure to contact and conduct the positive electrode of the battery 7, and its own elastic deformation causes the contact member 19 to contact the positive electrode of the battery 7.
Pressure is applied to the contact between one end of the contact member 18 and the negative electrode of the battery 7, and the spring part 20b is brought into contact with the negative electrode of the battery 8 through elastic pressure, and its own elastic deformation brings the one end of the contact member 18 and the battery 8 together. Apply pressure to the contact with the positive electrode. Therefore, the short-circuit contact member 20 not only has the function of short-circuiting the batteries 7 and 8, but also has the function of short-circuiting the batteries 7 and 8, as well as other contacts, that is, the contact member 18, the battery 8, and the contact member 1.
It has a function of applying pressure for electrical contact between the battery 7 and the battery 7.

Next, the locking structure between the short-circuit contact member 20 and the lower case 14 will be explained using the exploded perspective view of FIG. 3.

The lower case 14 has a series of locking claws 14a for the short-circuit contact member 20, and the short-circuit contact member 20 is locked and fixed by engaging the base edge of the short-circuit contact member 20 with the locking claws 14a. A positioning boss 14b protrudes from approximately the center of the locking claw 14a so that the short-circuit contact member 20 is positioned immediately before being pressed and locked, and the short-circuit contact member 20 is positioned at a position corresponding to the positioning boss 14b. A hole 20C is bored. Therefore, the lower case 14 shown in FIG.
Place the short-circuit contact member 20 in the direction of the arrow from the position of the short-circuit contact member 20, fit the positioning hole 20C into the positioning boss 14b, and then place the short-circuit contact member 20 again.
When 0 is pressed down, two pairs of locking claws 14 facing each other are released.
a bends in the direction of expanding outward from each other, and the base of the elastic short-circuiting contact member 20 also bends in the width direction due to the resistance from the inclined portion of the locking claw 14a, so that the edges of the short-circuiting contact member 20 are not engaged. It climbs over the tip of the locking pawl 14a and is locked in the state shown in FIG. 2.

Furthermore, in the embodiments of the present invention described above,
Since the batteries 7 and 8 are pressed by the short-circuit contact member 20 and come into contact with the contact members 18 and 19, the shape and material of the contact members 18 and 19 need only be able to electrically contact the batteries 7 and 8. , there is no need to provide elasticity. Furthermore, the battery can be replaced using the upper case 1.
3 and the lower case 14 are separated from each other.

Since the present invention is constructed and operates as described above, it provides the following excellent effects.

The contact member with spring elasticity can be made in one piece, and there is no need for any screws or other parts when attaching the contact member to the storage member, and there is no need for a process of caulking the tip of the boss when attaching the contact member.
This has the effect of lowering manufacturing costs and reducing failures.

Although the above embodiment of the present invention describes a structure that uses two batteries, the number of batteries used is not necessarily limited to two, and the structure according to the present invention can be applied to devices that use three or more batteries. It is easy to implement.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a conventional example of a battery connection mechanism;
FIG. 2 is a sectional view showing one embodiment of the battery connection mechanism according to the present invention, and FIG. 3 is a perspective view showing one structure of the short-circuit contact member in the above embodiment. Here, 12...Small electronic device, 13...Upper case, 14...Lower case, 15a, 15b...Battery compartment, 16...Printed wiring board, 18,1
9... Contact member, 20... Short circuit contact member.

Claims (1)

[Scope of Claims] 1. A battery connection mechanism for an electronic device in which a contact member for connecting electrodes of a plurality of batteries is attached to the battery housing member, wherein the housing member includes a boss and a boss that protrudes from the housing member. the contact member has a plurality of locking pawls having an inclined portion near the tip; the contact member has a hole portion that fits with the boss; and a plurality of sides that respectively engage with the plurality of locking pawls; The hole of the contact member fits into the boss of the storage member, and the contact member is fixed to the storage member in a state where the plurality of sides of the contact member cross over the slope of the locking claw and engage with each other. A battery connection mechanism for electronic equipment characterized by: