Electrical connection box and wire harness

1. An electrical connection box comprising:

a housing that includes a retaining wall, first and second connecting walls, and an opposing wall that compose a housing chamber into which an electronic component is accommodated and from which electrical wires are drawn out to outside when the electrical wires are electrically connected to the electronic component; and

at least one retaining mechanism that is provided between the retaining wall and the electronic component or a retaining member of the electronic component, and makes the housing chamber retain the electronic component or the retaining member, wherein

the housing has openings at both ends and includes a main component in which at least one housing chamber communicating with the respective openings is formed,

the retaining wall is made to warp toward the housing chamber side before the electronic component is in an accommodated state in which the retaining mechanism retains the electronic component or the retaining member in the housing chamber,

the opposing wall is opposite to the retaining wall,

the first and second connecting walls connect the retaining wall to the opposing wall, the retaining wall extends from the first connecting wall to the second connecting wall such that connecting portion sides of the first and second connecting walls connecting to the retaining wall tilt or warp toward the housing chamber side before the electronic component is in the accommodated state, and

an amount of warp of the retaining wall is the amount that the retaining wall is able to press the electronic component or the retaining member against the opposing wall when the electronic component is in the accommodated state.

2. The electrical connection box according to claim 1 , wherein

the retaining mechanism includes a first engaging body provided on the retaining wall, and a second engaging body that is provided on the electronic component or the retaining member and that engages with the first engaging body when the electronic component or the retaining member is accommodated in the housing chamber,

the first engaging body includes a pressing portion that applies to the second engaging body a pressing force toward a direction of eliminating the warp of the retaining wall when the electronic component is in the accommodated state, and

the second engaging body includes a receiving portion that receives the pressing force of the first engaging body when the electronic component is in the accommodated state.

3. The electrical connection box according to claim 2 , wherein

the housing includes a first cover component that, by being fitted in an end portion of one opening side of outer walls of the main component, closes up the one opening, and a second cover component that, by being fitted in an end portion of the other opening side of the outer walls of the main component, closes up the other opening,

the retaining wall composes a part of the outer walls of the main component, and is formed so as to deform in a direction of eliminating the warp to be in a shape that enables the first and the second cover components to be fitted in when the electronic component is in the accommodated state, and

the first and the second connecting walls compose a part of the outer walls of the main component, and are formed so as to deform in a direction of eliminating the tilt or the warp to be in a shape that enables the first and the second cover components to be fitted in when the electronic component is in the accommodated state.

4. The electrical connection box according to claim 1 , wherein

the housing includes a first cover component that, by being fitted in an end portion of one opening side of outer walls of the main component, closes up the one opening, and a second cover component that, by being fitted in an end portion of the other opening side of the outer walls of the main component, closes up the other opening,

the retaining wall composes a part of the outer walls of the main component, and is formed so as to deform in a direction of eliminating the warp to be in a shape that enables the first and the second cover components to be fitted in when the electronic component is in the accommodated state, and

the first and the second connecting walls compose a part of the outer walls of the main component, and are formed so as to deform in a direction of eliminating the tilt or the warp to be in a shape that enables the first and the second cover components to be fitted in when the electronic component is in the accommodated state.

5. The electrical connection box according to claim 1 , wherein

the amount of warp of the retaining wall and an amount of tilt or warp of the first and second connecting walls provides a size of the housing chamber that is smaller than a corresponding physical size of the electronic component or the retaining member before the electronic component is in the accommodated state such that each of the retaining wall, the first connecting wall, and the second connecting wall deform away from the housing chamber side when the electronic component is in the accommodated state.

6. A wire harness comprising:

an electronic component;

electrical wires electrically connected to the electronic component; and

an electrical connection box that includes a housing that includes a retaining wall, first and second connecting walls, and an opposing wall that compose a housing chamber into which the electronic component is accommodated and from which the electrical wires are drawn out to outside, and at least one retaining mechanism that is provided between the retaining wall and the electronic component or a retaining member of the electronic component, and makes the housing chamber retain the electronic component or the retaining member, wherein

the housing has openings at both ends and includes a main component in which at least one housing chamber communicating with the respective openings is formed,

the retaining wall is made to warp toward the housing chamber side before the electronic component is in an accommodated state in which the retaining mechanism retains the electronic component or the retaining member in the housing chamber,

the opposing wall is opposite to the retaining wall,

the first and second connecting walls connect the retaining wall to the opposing wall, the retaining wall extends from the first connecting wall to the second connecting wall such that connecting portion sides of the first and second connecting walls connecting to the retaining wall tilt or warp toward the housing chamber side before the electronic component is in the accommodated state, and

an amount of warp of the retaining wall is the amount that the retaining wall is able to press the electronic component or the retaining member against the opposing wall when the electronic component is in the accommodated state.

7. The electrical connection box according to claim 6 , wherein

the amount of warp of the retaining wall and an amount of tilt or warp of the first and second connecting walls provides a size of the housing chamber that is smaller than a corresponding physical size of the electronic component or the retaining member before the electronic component is in the accommodated state such that each of the retaining wall, the first connecting wall, and the second connecting wall deform away from the housing chamber side when the electronic component is in the accommodated state.