Vehicle-mounted apparatus having biasing structure using coil spring
AssigneeHitachi Astemo, Ltd.
InventorJun Soeda
Life of this patent
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Abstract
The present invention is to provide a vehicle-mounted apparatus having a biasing structure using a coil spring capable of reducing a lateral force of a coil spring that is applied to a biasing target member. When N1, n1, N0, and n0 represent the number of effective turns when the relief valve spring 37 is set in a valve hole 34 of a spool 29 in a compressed state, a value of an integer of N1, the number of effective turns when a length of the relief valve spring 37 is a natural length, and a value of an integer of N0, respectively, the spring 37 satisfies an equation 1: 0≤N1−n1≤0.25 or an equation 2: 0.75≤N1−n1<1.
Claims12
A vehicle-mounted apparatus having a biasing structure using a coil spring, the vehicle-mounted apparatus comprising:
- a housing member including a containing portion therein;
- a biasing target member movably provided in the containing portion;
- and
- a coil spring provided in the containing portion and configured to bias the biasing target member, the coil spring being set in the containing portion in a compressed state,
- wherein, when N1 and n1 represent the number of effective turns and a value of an integer of the number of effective turns of the coil spring in the compressed state, respectively, and N0 and n0 represent the number of effective turns and a value of an integer of the number of effective turns of the coil spring when a length of the coil spring is a natural length, respectively, the coil spring satisfies
- 0≤N1−n1≤0.25 or an equation 1:
- 0.75≤N1−n1<1, an equation 2:
- wherein, when the number of effective turns N1 of the coil spring in the compressed state satisfies the equation 1, the coil spring satisfies
- N1−n1<N0−n0, and an equation 3:
- wherein, when the number of effective turns N1 of the coil spring in the compressed state satisfies the equation 2, the coil spring satisfies
- N0−n0<N1−n1. an equation 4:
Dependencies are inferred from the claim text.