1. A barrel comprising:
a supporting part at one end of the barrel adjacent to an image side; and
a plurality of protrusions positioned at an inner surface of the barrel and protruding toward a central axis of the barrel, each protrusion comprising a guiding surface and an engaging surface connected with and next to the guiding surface, each guiding surface being oblique relative to the central axis, a distance between the central axis and a portion of the guiding surface adjacent to the image side being larger than that between the central axis and another portion of the guiding surface next to an object side, the guiding surface configured for guiding one or more optical components into the barrel, the engaging surface and the supporting part cooperatively clamping the optical components in the barrel.
2. The barrel of claim 1, wherein the barrel defines a stepped hole in the inner surface between the protrusions and the supporting part, the stepped hole comprises a first through hole and a second through hole in a direction from the object side to the image side, an inner diameter of the first through hole is less than the smallest inner diameter of a portion of the barrel having the protrusions, and an inner diameter of the second through hole is larger than the smallest inner diameter of a portion of the barrel having the protrusions.
3. The barrel of claim 1, wherein the barrel defines a cylindrical hole in the inner surface between the protrusions and the supporting part, and an inner diameter of the cylindrical hole is less than the smallest inner diameter of a portion of the barrel having the protrusions.
4. The barrel of claim 1, wherein an included angle between each guiding surface and the central axis is in a range from 4 degrees to 30 degrees.
5. The barrel of claim 1, wherein each guiding surface extends directly from the inner surface of the barrel.
6. The barrel of claim 1, wherein an included angle between the engaging surface and the central axis is in a range from 60 degrees to 90 degrees.
7. A lens module comprising:
a barrel; and
optical components received in the barrel;
the barrel comprising:
a supporting part at one end of the barrel adjacent to an image side; and
a plurality of protrusions positioned at an inner surface of the barrel and protruding toward a central axis of the barrel, each protrusion comprising a guiding surface and an engaging surface connected with and next to the guiding surface, each guiding surface being oblique relative to the central axis, a distance between the central axis and a portion of the guiding surface adjacent to the image side being larger than that between the central axis and another portion of the guiding surface next to an object side, the guiding surface configured for guiding one or more optical components into the barrel, the engaging surface and the supporting part cooperatively clamping the optical components in the barrel.
8. The lens module of claim 7, wherein the barrel defines a stepped hole in the inner surface between the protrusions and the supporting part, the stepped hole comprises a first through hole and a second through hole in a direction from the object side to the image side, an inner diameter of the first through hole is less than the smallest inner diameter of a portion of the barrel having the protrusions, and an inner diameter of the second through hole is larger than the smallest inner diameter of a portion of the barrel having the protrusions.
9. The lens module of claim 8, wherein the optical components comprise a first lens and a second lens from the object side to the image side, the first lens and the second lens are accommodated in the first through hole and the second through hole respectively, and an outer diameter of the second lens is substantially equal to the inner diameter of the second through hole.
10. The lens module of claim 9, wherein a depth of the first through hole is substantially equal to a thickness of an optically inactive part of the first lens, and a depth of the second through hole is substantially equal to a thickness of an optically inactive part of the second lens.
11. The lens module of claim 7, wherein the barrel defines a cylindrical hole in the inner surface between the protrusions and the supporting part, and an inner diameter of the cylindrical hole is less than the smallest inner diameter of a portion of the barrel having the protrusions.
12. The lens module of claim 7, wherein an included angle between each guiding surface and the central axis is in a range from 4 degrees to 30 degrees.
13. The lens module of claim 7, wherein each guiding surface extends directly from the inner surface of the barrel.
14. The lens module of claim 7, wherein an included angle between the engaging surface and the central axis is in a range from 60 degrees to 90 degrees.
15. A barrel comprising:
a supporting part at one end of the barrel adjacent to an image side;
a plurality of protrusions positioned on an inner surface of the barrel, each protrusion comprising a guiding surface and an engaging surface connected with the guiding surface, each guiding surface being oblique relative to a central axis of the barrel, a distance between the central axis and a portion of the guiding surface adjacent to the image side being larger than that between the central axis and another portion of the guiding surface next to an object side, the engaging surface and the supporting part cooperatively clamping optical components in the barrel; and
a stepped hole located in the inner surface between the protrusions and the supporting part, the stepped hole comprising a first through hole and a second through hole in a direction from the object side to the image side, an inner diameter of the first through hole being less than the smallest inner diameter of a portion of the barrel having the protrusions, and an inner diameter of the second through hole being larger than the smallest inner diameter of a portion of the barrel having the protrusions.
16. The barrel of claim 15, wherein each guiding surface extends directly from the inner surface of the barrel.
17. The barrel of claim 15, wherein an included angle between each guiding surface and the central axis is in a range from 4 degrees to 30 degrees.
18. The barrel of claim 17, wherein an included angle between the engaging surface and the central axis is in a range from 60 degrees to 90 degrees.
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 hydraulic clutch device comprising:
a clutch outer;
a clutch inner coaxially surrounded by the clutch outer and rotatably movable therein when the clutch device is disengaged;
a plurality of friction plates;
a clutch piston that sandwiches the friction plates together with either one of the clutch inner or the clutch outer and moves to the side to pressurize the friction plates in accordance with an increase in a hydraulic pressure in a control hydraulic chamber;
a clutch piston guide provided separate from, and disposed inside of the clutch outer in fixed relation to the clutch inner for concurrent rotation therewith, the clutch piston guide configured so that the control hydraulic chamber is formed between the clutch piston guide and the clutch piston; and
a canceller plate that forms a hydraulic canceller chamber on the side opposite to the control hydraulic chamber across the clutch piston, wherein:
the canceller plate has a projection portion disposed on an inner peripheral end thereof and the clutch piston guide has a notch portion disposed at the end thereof, the projection portion and the notch portion being engaged with each other and assembled,
a base circle of the projection portion is larger than an outer diameter of a portion where the clutch piston guide is engaged with the canceller plate,
a gap, through which operating oil can pass to the canceller chamber, is formed between the canceller plate and the clutch piston guide, and
a locking tool is disposed and engaged in an inner peripheral groove disposed radially inside of the projection portion and regulates axial movement of the canceller plate with respect to the clutch piston guide.
2. The hydraulic clutch device according to claim 1, wherein the locking tool is a linear spring.
3. The hydraulic clutch device according to claim 2, wherein the locking tool has an engagement hook portion that is inserted into an engagement hole formed in the inner peripheral face of the canceller plate.
4. The hydraulic clutch device according to claim 1, wherein the notch portion has a void where the projection portion is not engaged.
5. The hydraulic clutch device according to claim 1, wherein a thickness of the projection portion is formed thinner than an interval between the end of the clutch piston guide and the locking tool.
6. The hydraulic clutch device according to claim 1, wherein:
the friction plates include a plurality of first friction plates engaged with the clutch outer incapable of relative rotation and a plurality of second friction plates arranged alternately overlapping the first friction plates and engaged with the clutch inner incapable of relative rotation,
the clutch piston has a pressurizing plate portion, and
a pressure bearing plate portion is disposed on either one of the clutch inner or the clutch outer so that the first and second friction plates arranged mutually overlapping are sandwiched between the pressure bearing plate portion and the pressurizing plate portion.
7. A hydraulic clutch device comprising:
a clutch outer;
a clutch inner coaxially surrounded by the clutch outer and rotatably movable therein when the clutch device is disengaged;
a plurality of first friction plates operatively attached to the clutch outer, and a plurality of second friction plates operatively attached to the clutch inner;
a clutch piston that sandwiches the first and second friction plates together with either one of the clutch inner or the clutch outer and moves to the side to pressurize the friction plates in accordance with an increase in a hydraulic pressure in a control hydraulic chamber;
a clutch piston guide provided separate from, and disposed inside of the clutch outer in fixed relation to the clutch inner for concurrent rotation therewith, the clutch piston guide configured so that the control hydraulic chamber is formed between the clutch piston guide and the clutch piston; and
a canceller plate that forms a hydraulic canceller chamber on the side opposite to the control hydraulic chamber across the clutch piston, wherein:
the canceller plate has a plurality of integrally formed projection portions disposed on an inner peripheral end thereof, and the clutch piston guide has a plurality of notch portions formed therein and disposed at the end thereof, the projection portions and the notch portions being engaged with each other and assembled,
and
a locking tool is disposed and engaged in an inner peripheral groove disposed radially inside of the projection portions, the locking tool configured to regulate axial movement of the canceller plate with respect to the clutch piston guide.
8. The hydraulic clutch device according to claim 7, wherein the locking tool is a linear spring.
9. The hydraulic clutch device according to claim 8, wherein the locking tool has an engagement hook portion that is inserted into an engagement hole formed in the inner peripheral face of the canceller plate.
10. The hydraulic clutch device according to claim 7, wherein the notch portion has a void where the projection portion is not engaged.
11. The hydraulic clutch device according to claim 7, wherein a base circle of the projection portion is larger than an outer diameter of a portion where the clutch piston guide is engaged with the canceller plate,
and wherein a gap, through which operating oil can pass to the canceller chamber, is formed between the canceller plate and the clutch piston guide.
12. The hydraulic clutch device according to claim 7, a thickness of the projection portion is formed thinner than an interval between the end of the clutch piston guide and the locking tool.
13. The hydraulic clutch device according to claim 7, wherein:
the clutch piston has a pressurizing plate portion, and
a pressure bearing plate portion is disposed on either one of the clutch inner or the clutch outer so that the first and second friction plates arranged mutually overlapping are sandwiched between the pressure bearing plate portion and the pressurizing plate portion.