Fusible link unit

1. A fusible link unit comprising:

a fuse busbar that includes:

a first busbar having a first input connecting portion;

a second busbar having a second input connecting portion; and

a fusible element provided between the first busbar and the second busbar; and

a housing that is provided with the fuse busbar,

wherein the fusible element is configured to melt down when a current of a predetermined value is conducted therethrough;

wherein the first input connecting portion and the second input connecting portion are formed into the same shape;

wherein the first and second input connecting portions are passed through inserting holes, which are provided on both end portions of the housing, and are projected outside of the housing;

wherein the housing is formed symmetrical transversely;

wherein the fusible element is provided between the first input connecting portion and the second input connecting portion; and

wherein the first busbar, the first input connecting portion, the second busbar, the second input connecting portion, and the fusible element are arranged in the substantially same plane and are also arranged on a first line at this order, a first slit extending in a direction perpendicular to the first line so as to separate the first input connecting portion and the first busbar by an airgap, and a second slit extending in a direction parallel to the first line so as to separate the second input connecting portion and the second busbar by an airgap.

2. The fusible link unit according to claim 1 , wherein the first slit and the second slit are formed in the first busbar and the second busbar respectively;

wherein the first input connecting portion is configured to be bent with respect to a conductive portion of the first busbar by the first slit; and

wherein the second input connecting portion is configured to be bent with respect to a conductive portion of the second busbar by the second slit.

3. The fusible link unit according to claim 1 , wherein the first and second busbars have output connecting portions respectively;

wherein each of the output connecting portions includes:

a terminal connecting portion which is connected to a mating terminal; and

a connector connecting portion which is connected to a mating terminal accommodated in a connector; and

wherein the housing includes:

a terminal supporting portion into which the terminal connecting portion is inserted; and

a connector opening portion which is fitted with the connector accommodating the mating terminal.

4. The fusible link unit according to claim 1 , wherein the housing has a locking portion which is adapted to be locked on an inner wall of a relay box in which the housing is accommodated.

5. The fusible link unit according to claim 1 , wherein the fuse busbar is contained in the housing.

6. The fusible link unit according to claim 1 , wherein the fuse busbar is embedded in the housing.

7. The fusible link unit according to claim 1 , wherein the first busbar extends from the fusible element in a first direction and the second busbar extends from the fusible element in a second direction being opposite to the first direction.

8. The fusible link unit according to claim 7 , wherein the first input connecting portion is provided at one end portion of the first busbar which is opposite to the other end of the first busbar near the fusible element in the first direction; and

wherein the second input connecting portion is provided at one end portion of the second busbar which is opposite to the other end of the first busbar near the fusible element in the second direction.