1. A coaxial connector having a moveable terminal, comprising:
a metallic bracket defining a receiving space therein;
a contact terminal insulated assembled to the bracket, and configured a stationary first part and a second part telescopically assembled within the first part.
2. The coaxial connector as claimed in claim 1, wherein said first part of the contact terminal has a cylindrical shape extending along an axial direction comprising a front mating portion and a rear receiving socket for receiving the second part.
3. The coaxial connector as claimed in claim 2, wherein said rear receiving socket of the first part has a tubular inner surface having a first length along the axial direction.
4. The coaxial connector as claimed in claim 3, wherein said second part of the contact terminal comprises an engaging portion received in the rear receiving socket and a tail portion extending from the engaging portion and outwardly from the rear receiving socket.
5. The coaxial connector as claimed in claim 4, wherein said engaging portion of the second part has a second length less than the first length, the engaging portion abutting against the tubular inner surface of the rear receiving socket and movable along the axial direction.
6. The coaxial connector as claimed in claim 4, further comprising a collar surrounding the tail portion of the second part and interfering with the tubular inner surface of the rear receiving socket.
7. The coaxial connector as claimed in claim 1, further comprising an insulative member received in the receiving space, the insulative member having a hole for receiving the first part of the contact terminal.
8. The coaxial connector as claimed in claim 1, wherein said bracket comprise a main portion having external threads for receiving a corresponding plug thereon, and a rear shoulder portion for mounting on a panel.
9. A coaxial connector mounted on a panel and electrically connected to a printed circuit board comprising:
a conductive bracket defining a receiving space therein;
a contact terminal insulated assembled to the bracket, the contact terminal comprising:
a first conductive part having a receiving socket extending along an axial direction, having a tubular inner surface with a first length; and
a second conductive part telescopically assembled within the first conductive part, and having an engaging portion with a second length shorter than the first length, the engaging portion abutting against the tubular inner surface and movable along the axial direction.
10. The coaxial connector as claimed in claim 9, wherein said second conductive part has a tail portion extending connected with the engaging portion and extending outwardly from the receiving socket for electrically connecting to the printed circuit board.
11. The coaxial connector as claimed in claim 10, wherein said engaging portion of the second conductive part is of a cylindrical shape and has a first diameter, the tail portion is of a cylindrical shape and has a second diameter smaller than the first diameter.
12. A coaxial connector comprising:
a contact terminal, an insulative member and a metallic bracket fully circumferentially surrounding one another in sequence;
the contact terminal including a first part and a second part under condition that the first part defines a mating section for mating with a complementary connector and the second part defines the mounting section for mounting to an external part on which at least one of said bracket and said insulative member is seated;
said insulative member being immovably engaged within the bracket, said first part being immovably engaged within the insulative member while said second part being moveably engaged with the first part along an axial direction.
13. The coaxial connector as claimed in claim 12, further including an insulative collar behind the second part for restricting backward movement of the second part toward the external part.
14. The coaxial connector as claimed in claim 13, wherein a front portion of said second part is located inside said first part radially.
15. The coaxial connector as claimed in claim 14, wherein said collar is located at a rear end of the first part.
16. The coaxial connector as claimed in claim 14, wherein said collar is located at a rear end of the insulative member.
17. The coaxial connector as claimed in claim 12, wherein said insulative member is seated upon the external part.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A biaxially oriented film for reinforcing the electrolyte membrane of a polymer electrolyte fuel cell, wherein
the film comprises (i) a layer mainly composed of polyethylene naphthalene dicarboxylate and has (ii) a Young’s modulus in at least one direction of not less than 9,000 MPa and (iii) a thickness of 15 to 150 \u03bcm.
2. The film according to claim 1 which comprises not less than 80 mol % of ethylene-2,6-naphthalene dicarboxylate based on the total number of moles of all the recurring units.
3. The film according to claim 1, wherein an adherent layer comprising acrylic resin is formed on at least one side of the layer mainly composed of polyethylene naphthalene dicarboxylate.
4. The film according to claim 1, wherein the acrylic resin is an acrylic resin containing an amide group.
5. The film according to claim 3, wherein the adherent layer is formed before the crystaline orientation of the layer mainly composed of polyethylene naphthalene dicarboxylate is completed.
6. The film according to claim 1, wherein the Young’s modulus in at least one direction in a 90\xb0 C. atmosphere is not less than 4,000 MPa.
7. The film according to claim 1, wherein the rupture elongation at break (Rx) represented by the following equation (1) is not less than 50% in the direction in which the Young’s modulus is not less than 9,000 MPa:
Rx (%)=XX0\xd7100 \u2003\u2003(1)
wherein X is a rupture elongation (%) after 200 hours of a treatment at 121\xb0 C., 2 atm and 100% RH, X0 is the initial rupture elongation (%) before the treatment and Rx is a rupture elongation at break (%).
8. The film according to claim 1 which has a Young’s modulus in the transverse direction of not less than 9,000 MPa.
9. The film according to claim 1 which has an absolute value of the difference between the Young’s modulus in the longitudinal direction and the Young’s modulus in the transverse direction of 2,000 to 8,000 MPa.
10. The film according to claim 1 which has heat shrinkage factors in the longitudinal direction and the transverse direction after 30 minutes of a heat treatment at 150\xb0 C. of not more than 2.0%.
11. The film according to claim 1, wherein the polymer electrolyte fuel cell is for a mobile object.
12. The film according to claim 11, wherein the mobile object is an automobile.
13. A reinforced electrolyte membrane for polymer electrolyte fuel cells, comprising an electrolyte membrane and two biaxially oriented frame-like films which are opposed to each other with the electrolyte membrane therebetween, wherein
each of the frame-like films comprises (i) a layer mainly composed of polyethylene naphthalene dicarboxylate and has (ii) a Young’s modulus in at least one direction of not less than 9,000 MPa and (iii) a thickness of 15 to 150 \u03bcm.
14. The reinforced electrolyte membrane according to claim 13, wherein the directions of the two frame-like films in which the Young’s modulus is not less than 9,000 MPa are orthogonal to each other.
15. The reinforced electrolyte membrane according to claim 13, wherein the electrolyte membrane is made of a perfluorosulfonic acid resin.
16. A membrane-electrode assembly for polymer electrolyte fuel cells, comprising an electrolyte membrane, a frame composed of two biaxially oriented frame-like films, a positive electrode and a negative electrode, wherein the two frame-like films are opposed to each other with the electrolyte membrane therebetween, the positive electrode and the negative electrode are opposed to each other with the electrolyte membrane therebetween in the frame, and each of the frame-like films comprises (i) a layer mainly composed of polyethylene naphthalene dicarboxylate and has (ii) a Young’s modulus in at least one direction of not less than 9,000 MPa and (iii) a thickness of 15 to 150 \u03bcm.
17. The membrane-electrode assembly according to claim 16, wherein the directions of the two frame-like films in which the Young’s modulus is not less than 9,000 MPa are orthogonal to each other.
18. The membrane-electrode assembly according to claim 16, wherein the electrolyte membrane is made of a perfluorosulfonic acid resin.
19. A method of using a biaxially oriented film which comprises (i) a layer mainly composed of polyethylene naphthalene dicarboxylate and has (ii) a Young’s modulus in at least one direction of not less than 9,000 MPa and (iii) a thickness of 15 to 150 \u03bcm as a reinforcing member for the electrolyte membrane of a polymer electrolyte fuel cell.
20. A polymer electrolyte fuel cell having the film of claim 1.