Hermetic terminal and tank valve device including same
A hermetic terminal including a base made of a synthetic resin having a large-diameter part, designed to be attached to a hole part that connects to each of a low-pressure region and a high-pressure region, at least one electrode inserted through the base, and a seal member designed to be externally mounted on the base in a location closer to the high-pressure region than the large-diameter part, the large-diameter part having a parting line on an outer circumferential face thereof.
1. A hermetic terminal comprising:
a base made of a synthetic resin having a mounting face and a large-diameter part, designed to be attached to a hole part that connects to each of a low-pressure region and a high-pressure region;
at least one electrode inserted through the base; and
a seal member designed to be externally mounted on the mounting face of the base in a location closer to the high-pressure region than the large-diameter part,
the large-diameter part having a parting line on an outer circumferential face thereof, and
the parting line not being formed on the mounting face.
2. The hermetic terminal according to claim 1 , wherein
the base has a contact face on a low-pressure region side of the large-diameter part, and the contact face is seated on a seating face formed in the hole part, and
the contact face has a gap with a most reduced diameter part of the seating face.
3. The hermetic terminal according to claim 1 , further comprising:
a reinforcing member having a higher strength than the base and insulating property, wherein
the reinforcing member is attached to a part on a low-pressure region side of the base, and the base is seated on a seating face of the hole part via the reinforcing member.
4. The hermetic terminal according to claim 1 , further comprising:
an insulator made of a synthetic resin having insulating property, wherein
the electrode has at least a projecting part projecting from the base,
the base is integrally formed around the electrode, and
the insulator is fitted with the projecting part of the electrode.
5. A tank valve device, designed to be provided for a pressure container, the tank valve device comprising:
the hermetic terminal according to claim 1 ;
a casing designed to be attached to the pressure container; and
an electrical component designed to be attached to the casing such that the electrical component is located inside the pressure container which is a high-pressure region side.
6. A hermetic terminal comprising:
a base made of a synthetic resin, designed to be fitted into a hole part that connects to each of a low-pressure region and a high-pressure region; and
at least one electrode inserted through the base,
the base having a base part, and a seat face formed on a low-pressure region side of the base part,
the base part having a parting line,
the seat face having no parting line and being pushed against a seating face formed in the hole part to keep hermeticity of the high-pressure region with respect to the low-pressure region.
7. The hermetic terminal according to claim 6 , further comprising a biasing member that biases the base to push the seat face against the seating face.
8. The hermetic terminal according to claim 6 , wherein the base has a deforming part on a high-pressure region side, and the base is pushed until the deforming part deforms so as to seat the seat face on the seating face.