Structure of electrical terminals for establishing electrical contact between a battery pack and an electrical device
DCFirst Claim
1. A structure of electrical terminals for establishing electrical contact between a battery pack and an electrical device by attachment of the battery pack to the electrical device, the structure comprising,a plurality of female terminals provided in the battery pack, and a plurality of male terminals provided in the electrical device and adapted to be coupled to the female terminals, wherein each of the female terminals includes at least two pairs of elastic plates, each pair of elastic plates being capable of holding one of the male terminals therebetween when the battery pack is attached to the electrical device, the elastic plate pairs of each female terminal being disposed along the path of movement of the male terminal when the battery pack is attached to the electrical device such that the number of elastic plate pairs of each female terminal that hold each male terminal therebetween is determined by the length of the male terminal along said path of movement.
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Abstract
A battery pack (1) has two female terminals (7) each including two pairs of elastic plates (10). Each pair of elastic plates (10) are arranged symmetrically about a base plate (8). Each elastic plate (10) includes a parallel portion (11) oriented parallel to its counterpart of the paired elastic plate (10). Also included in each plate (10) is a contact pressure portion (12) which is bent from one end the parallel portion (11) so as to extend into contact with its counterpart of the paired elastic plate (10). The contact pressure portion (12) is bent back at the contact point such that a small gap is formed between the free ends of the paired pressure portions. A device to which the battery pack (1) is attached, such as an electric power tool or a charger, includes male terminals (17) to be coupled to the pack. By specifying the length of the male terminals (17), an appropriate level of contact pressure can be selected for the terminals (7, 17).
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Citations
12 Claims
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1. A structure of electrical terminals for establishing electrical contact between a battery pack and an electrical device by attachment of the battery pack to the electrical device, the structure comprising,
a plurality of female terminals provided in the battery pack, and a plurality of male terminals provided in the electrical device and adapted to be coupled to the female terminals, wherein each of the female terminals includes at least two pairs of elastic plates, each pair of elastic plates being capable of holding one of the male terminals therebetween when the battery pack is attached to the electrical device, the elastic plate pairs of each female terminal being disposed along the path of movement of the male terminal when the battery pack is attached to the electrical device such that the number of elastic plate pairs of each female terminal that hold each male terminal therebetween is determined by the length of the male terminal along said path of movement.
Specification