1. A rubber composition comprising, as essential components:
an EDPM polymer;
a carbon black;
an electrical insulating amorphous or spindle-shaped filler;
a softener; and
a sulfur-based vulcanizing agent as essential components, and also comprising, as an optical component:
an electrical insulating plate-shaped filler,
wherein an obtained vulcanized product is satisfied with the following Equations (1) and (2):
volume resistivity\u22671.0\xd7106 \u03a9\xb7cm\u2003\u2003(1)
(M30<100\xb0 C.>M30<23\xb0 C.>\u22121)\xd7100\u2267\u221215%\u2003\u2003(2)
where M30<23\xb0 C.> is a tensile stress at elongation of 30% as measured by a tensile test at 23\xb0 C., and
M30<100\xb0 C.> is a tensile stress at elongation of 30% as measured by a tensile test at 100\xb0 C.
2. The rubber composition according to claim 1, wherein the rubber composition is satisfied with the following Equation (3) (regression equation):
Z=a1S+a2Wc\xb7D+a3WhaHa+a4WhbHb\u2003\u2003(3)
where Z is a value of the regression equation,
S is a total sulfur contenta total filling amount of rubber composition, in which the total sulfur content is a sum of:
sulfur in sulfur based vulcanizing agent;
sulfur emitted from the vulcanization accelerator during vulcanization; and
sulfur in other agent in the rubber composition in a case where the rubber composition includes other agent,
Wc is a formulation ratio of carbon black (part by mass based on 100 parts by mass of EPDM polymer),
D is a DBP absorption amount of carbon black (Method A, cm3100 g),
Wha is a formulation ratio of amorphous or spindle-shaped filler (part by mass based on 100 parts by mass of EPDM polymer),
Ha is a specific surface area of amorphous or spindle-shaped filler (m2g),
Whb is a formulation ratio of plate-shaped filler (part by mass based on 100 parts by mass of EPDM polymer),
Hb is a specific surface area of plate-shaped filler (m2g),
a1, a2, a3 and a4 are regression coefficients,
a1=5.5\xd710\u22123,
a2=0.45\xd7103,
a3=0.21, and
a4=\u22120.65.
3. The rubber composition according to claim 2, wherein the formulation ratio of the carbon black in the total filling amount of the rubber composition is 10 to 28% by mass.
4. The rubber composition according to claim 2, wherein a formulation ratio of the total sulfur content in the total filling amount of the rubber composition is 0.35 to 0.60% by mass.
5. The rubber composition according to claim 2, wherein a total formulation ratio of the electrical insulating fillers based on 100 parts by mass of the EPDM polymer is 80 to 150 parts by mass.
6. The rubber composition according to claim 2, wherein a formulation ratio of the amorphous or spindle-shaped filler to the plate-shaped filler 95:5 to 10:90.
7. The rubber composition according to claim 6, wherein the amorphous or spindle-shaped filler is one or two selected from a group consisting of ground calcium carbonate and precipitated calcium carbonate.
8. The rubber composition according to claim 6, wherein the plate-shaped filler is one, two or more selected from a group consisting of powder talc, hard clay, surface-treated clay and calcined clay.
9. The rubber composition according to claim 2, wherein a DBP absorption amount of the carbon black is 100 to 160 cm2100 g.
10. The rubber composition according to claim 2, wherein a Mooney viscosity ML1+4 of the EPDM polymer at 125\xb0 C. is 40 to 200.
11. A rubber composition comprising:
an EDPM polymer of 100 parts by mass;
a carbon black of 66 to 93 parts by mass;
an electrical insulating filler of 87 to 145 parts by mass;
a softener of 31 to 76 parts by mass; and
a sulfur-based vulcanizing agent and vulcanization accelerator so that a total sulfur content thereof is 1.2 to 1.8 parts by mass,
wherein 10 or more % by mass of the electrical insulating filler is constituted as amorphous or spindle-shaped filler, and
wherein an obtained vulcanized product is satisfied with the following Equations (1) and (2):
volume resistivity\u22671.0\xd7106 \u03a9\xb7cm\u2003\u2003(1)
(M30<100\xb0 C.>M30<23\xb0 C.>\u22121)\xd7100\u2267\u221215%\u2003\u2003(2)
where M30<23\xb0 C.> is a tensile stress at elongation of 30% as measured by a tensile test at a room temperature; and
M30<100\xb0 C.> is a tensile stress at elongation of 30% as measured by a tensile test at 100\xb0 C.
12. A rubber product obtained by vulcanizing the rubber composition according to claim 1.
13. A rubber product obtained by vulcanizing the rubber composition according to claim 11.
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 mirror for a vehicle, comprising:
a mirror surface;
an actuator which swivels the mirror surface;
at least one magnet which changes orientation by an angle in accordance with a variation in an inclined angle of the mirror surface when the actuator swivels the mirror surface;
at least one signal output unit which outputs a signal in accordance with the inclined angle of the mirror surface, based on the orientation of the magnet;
an interlocking member which changes an orientation in conjunction with the mirror surface, so that the orientation of the interlocking member is aligned with the orientation of the mirror surface;
at least one slide block being urged toward the interlocking member, and moving in a direction substantially perpendicular to the mirror surface by a distance in accordance with the variation in the inclined angle when the inclined angle of the mirror surface changes; and
at least one turning member which rotates by an angle in accordance with a moving distance of the slide block, when the slide block moves,
wherein the magnet is secured to the turning member and rotates in relation to the rotation of the turning member.
2. The mirror according to claim 1, wherein the slide block is supported not to rotate around an axis parallel to the moving direction of the slide block, the turning member comprises a screw portion to be screwed into the slide block on the axis and to rotate on a thread ridge or a thread groove formed in the slide block when the slide block moves in the moving direction, and a turning portion that is secured to the screw portion and that rotates around the axis in conjunction with the screw portion, and the magnet is fixed to the turning portion.
3. The mirror according to claim 1, further comprising at least one MR element being positioned such that a current, of which amount changes in accordance with the orientation of the magnet, flows in the MR element, wherein the signal output unit outputs the signal in accordance with the inclined angle of the mirror surface, based on the current flowing in the MR element.
4. The mirror according to claim 1, wherein the magnet changes the orientation by at most 180 degrees over a range where the mirror surface swivels.
5. A mirror for a vehicle, comprising:
a mirror surface;
an actuator which swivels the mirror surface;
at least one magnet which moves by a distance in accordance with a variation in an inclined angle of the mirror surface when the actuator swivels the mirror surface;
at least one MR element which detects a movement of the magnet;
at least one signal output unit which outputs a signal in accordance with the inclined angle of the mirror surface, based on an output of the MR element;
an interlocking member which changes an orientation in conjunction with the mirror surface, so that the orientation of the interlocking member is aligned with the orientation of the mirror surface;
at least one slide block being urged toward the interlocking member, and moving in a direction substantially perpendicular to the mirror surface by a distance in accordance with the variation in the inclined angle when the inclined angle of the mirror surface changes; and
at least one turning member which rotates by an angle in accordance with a moving distance of the slide block, when the slide block moves,
wherein the magnet changes the orientation by at most 180 degrees over a range where the mirror surface swivels, and the magnet is secured to the turning member and rotates in relation to the rotation of the turning member.
6. The mirror according to claim 5, wherein the slide block is supported not to rotate around an axis parallel to the moving direction of the slide block, the turning member comprises a screw portion to be screwed into the slide block on the axis and to rotate on a thread ridge or a thread groove formed in the slide block when the slide block moves in the moving direction, and a turning portion that is secured to the screw portion and that rotates around the axis in conjunction with the screw portion, and the magnet is fixed to the turning portion.
7. An angle detection device for detecting an inclined angle of a mirror surface of a mirror for a vehicle, the device comprising:
at least one magnet which changes orientation by an angle in accordance with a variation in the inclined angle of the mirror surface, when an actuator swivels the mirror surface;
at least one signal output unit which outputs a signal in accordance with the inclined angle of the mirror surface, based on the orientation of the magnet;
an interlocking member which changes an orientation in conjunction with the mirror surface, so that the orientation of the interlocking member is aligned with the orientation of the mirror surface;
at least one slide block being urged toward the interlocking member, and moving in a direction substantially perpendicular to the mirror surface by a distance in accordance with the variation in the inclined angle when the inclined angle of the mirror surface changes; and
at least one turning member which rotates by an angle in accordance with a moving distance of the slide block, when the slide block moves,
wherein the magnet is secured to the turning member and rotates in relation to the rotation of the turning member.
8. The angle detection device according to claim 7, wherein the slide block is supported not to rotate around an axis parallel to the moving direction of the slide block, the turning member comprises a screw portion to be screwed into the slide block on the axis and to rotate on a thread ridge or a thread groove formed in the slide block when the slide block moves in the moving direction, and a turning portion that is secured to the screw portion and that rotates around the axis in conjunction with the screw portion, and the magnet is fixed to the turning portion.
9. The angle detection device according to claim 7, further comprising at least one MR element being positioned such that a current, of which amount changes in accordance with the orientation of the magnet, flows in the MR element, wherein the signal output unit outputs the signal in accordance with the inclined angle of the mirror surface, based on the current flowing in the MR element.
10. The mirror according to claim 7, wherein the magnet changes the orientation by at most 180 degrees over a range where the mirror surface swivels.
11. An angle detection device for detecting an inclined angle of a mirror surface of a mirror for a vehicle, the device comprising:
at least one magnet which moves by a distance in accordance with a variation in the inclined angle of the mirror surface, when an actuator swivels the mirror surface;
at least one MR element which detects a movement of the magnet;
a signal output unit outputs a signal in accordance with an inclined angle of the mirror surface, based on an output of the MR element;
an interlocking member which changes an orientation in conjunction with the mirror surface, so that the orientation of the interlocking member is aligned with the orientation of the mirror surface;
at least one slide block being urged toward the interlocking member, and moving in a direction substantially perpendicular to the mirror surface by a distance in accordance with the variation in the inclined angle when the inclined angle of the mirror surface changes; and
at least one turning member which rotates by an angle in accordance with a moving distance of the slide block, when the slide block moves,
wherein the magnet changes the orientation by at most 180 degrees over a range where the mirror surface swivels, and the magnet is secured to the turning member and rotates in relation to the rotation of the turning member.
12. The angle detection device according to claim 11, wherein the slide block is supported not to rotate around an axis parallel to the moving direction of the slide block, the turning member comprises a screw portion to be screwed into the slide block on the axis and to rotate on a thread ridge or a thread groove formed in the slide block when the slide block moves in the moving direction, and a turning portion that is secured to the screw portion and that rotates around the axis in conjunction with the screw portion, and the magnet is fixed to the turning portion.