1. A vehicle brake device comprising
a master cylinder (11) that is operated by a brake pedal (12) to generate brake fluid pressure for two lines,
a stroke simulator (35) that is connected to at least one output port (21) of the master cylinder (11) and into which is introduced a brake fluid from the master cylinder (11),
a first fluid path (Pa to Pd) that provides a connection between a first fluid pressure chamber (17) of the master cylinder (11) and a wheel cylinder (26, 27) of a first line,
a second fluid path (Qa to Qd) that provides a connection between a second fluid pressure chamber (19) of the master cylinder (11) and a wheel cylinder (30, 31) of a second line,
a slave cylinder (42) that is connected to the first fluid path (Pa to Pd) and generates a brake fluid pressure by means of the driving force of an actuator (43),
first and second master cut valves (32, 33) that are provided in the first and second fluid paths (Pa to Pd, Qa to Qd) respectively on an upstream side relative to the slave cylinder (42) and can block communication between the master cylinder (11) and the wheel cylinders (26, 27; 30, 31) of the first and second lines,
a third fluid path (Rc) that provides communication between the first and second fluid paths (Pa to Pd, Qa to Qd) on a downstream side relative to the first and second master cut valves (32, 33), and
a communication control valve (41) that can block the third fluid path (Rc).
2. The vehicle brake device according to claim 1, wherein the slave cylinder (42) comprises restricting means (46) that restricts expansion of the volume of a fluid pressure chamber (50) of the slave cylinder (42) when a fluid pressure is externally applied to the fluid pressure chamber (50).
3. The vehicle brake device according to claim 1, wherein the device comprises an auxiliary cut valve (52) that is provided in at least one of the first and second fluid paths (Pa to Pd, Qa to Qd) on a downstream side relative to the third fluid path (Rc) and can block the brake fluid pressure from the slave cylinder (42), and a pressure reduction valve (54) that is provided in each wheel cylinder (26, 27; 30 and 31) on a downstream side relative to the auxiliary cut valve (52) and can release the brake fluid pressure from the slave cylinder (42) into a reservoir (53).
4. The vehicle brake device according to of claim 1, wherein a degree of opening of the communication control valve (41) is adjustable.
5. The vehicle brake device according to claim 3, wherein the device comprises a first fluid pressure sensor (Sa) that detects a brake fluid pressure generated by the master cylinder (11) and a second fluid pressure sensor (Sa) that detects a brake fluid pressure of the third fluid path (Rc) or the first and second fluid paths (Pa to Pd, Qa to Qd) between the first and second master cut valves (32, 33) and the auxiliary cut valve (52), the second fluid pressure sensor (Sb) being provided in the second fluid path (Qa to Qd).
6. A vehicle brake device control method for controlling operation of the vehicle brake device according to claim 1, the method comprising
a step of transmitting, in a state in which the communication control valve (41) is closed, the master cut valve (32) disposed in one fluid path, on the slave cylinder (42) side, of the first and second fluid paths (Pa to Pd, Qa to Qd) is closed, and the master cut valve (33) in the other fluid path is opened, a brake fluid pressure generated by the slave cylinder (42) to the fluid path on the slave cylinder (42) side of the first and second fluid paths (Pa to Pd, Qa to Qd).
7. A vehicle brake device control method for controlling the operation of the vehicle brake device according to claim 3, the method comprising
a step of operating the slave cylinder (42) in a state in which the communication control valve (41) is opened, to generate a first brake fluid pressure, and
a step of opening the pressure reduction valve (54) and reducing the brake fluid pressure of the wheel cylinder (26, 27; 30, 31) of at least one of the first and second lines to a second brake fluid pressure, which is lower than the first brake fluid pressure.
8. The vehicle brake device according to claim 2, wherein the device comprises an auxiliary cut valve (52) that is provided in at least one of the first and second fluid paths (Pa to Pd, Qa to Qd) on a downstream side relative to the third fluid path (Rc) and can block the brake fluid pressure from the slave cylinder (42), and a pressure reduction valve (54) that is provided in each wheel cylinder (26, 27; 30 and 31) on a downstream side relative to the auxiliary cut valve (52) and can release the brake fluid pressure from the slave cylinder (42) into a reservoir (53).
9. The vehicle brake device according to claim 2, wherein a degree of opening of the communication control valve (41) is adjustable.
10. The vehicle brake device according to claim 3, wherein a degree of opening of the communication control valve (41) is adjustable.
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 handheld device, comprising:
an appearance, comprising a via;
a system ground plane, disposed inside the appearance; and
a planar antenna, disposed on the appearance, and extended to an inner surface of the appearance through the via so as to be coupled to the system ground plane.
2. The handheld device according to claim 1 further comprising:
a conductive device, coupled between the planar antenna and the system ground plane.
3. The handheld device according to claim 2, wherein the conductive device is a spring or a pogo pin.
4. The handheld device according to claim 1, wherein the planar antenna is disposed on the appearance through a coating technique.
5. The handheld device according to claim 1, wherein the system ground plane comprising:
a feed point, coupled to the planar antenna.
6. The handheld device according to claim 5, wherein the system ground plane further comprises:
a ground point, coupled to the planar antenna.
7. The handheld device according to claim 1 further comprising:
a passivation layer, disposed on the appearance, and covering the planar antenna.
8. The handheld device according to claim 1, wherein the planar antenna is disposed on an external surface of the appearance.
9. The handheld device according to claim 1, wherein the planar antenna is disposed on an intermediate layer of the appearance.
10. The handheld device according to claim 1, wherein the via is served as a speaker.
11. The handheld device according to claim 1, wherein the planar antenna forms a pattern on the appearance.
12. The handheld device according to claim 1 further comprising:
a coating material, coated on the appearance, wherein the coating material and the planar antenna form a pattern on the appearance.
13. The handheld device according to claim 1 further comprising:
a first coating material, coated on the appearance; and
a second coating material, coated on the appearance, wherein the first coating material, the second coating material, and the planar antenna form a pattern on the appearance, and a color of the first coating material is different from a color of the second coating material.
14. A handheld device, comprising:
an appearance, comprising a conductive via;
a system ground plane, disposed inside the appearance; and
a planar antenna, disposed on the appearance, and coupled to the system ground plane through the conductive via.
15. A disposition method of a planar antenna, comprising:
forming a via in an appearance; and
disposing the planar antenna on the appearance, wherein the planar antenna is extended to an inner surface of the appearance through the via so as to be electrically connected to a system ground plane.
16. A disposition method of a planar antenna, comprising:
disposing the planar antenna on an appearance, wherein the planar antenna is electrically connected to a via of the appearance and coupled to a system ground plane inside the appearance through the via.