1. A combination of a curl spring and a holder used in a window sash counterbalance system, the holder comprising:
a holder body being formed of a first material having a first coefficient of friction to hold curled coils of the curl spring and permit uncurled lengths of the curl spring to pass out of and into the holder; and
a bearing surface of the holder engaged by the curled coils of the curl spring substantially when a sash is lowered thereby uncurling the curl spring, the bearing surface being formed of a frictional material having a second coefficient of friction greater than the first coefficient of friction and within a range of about 0.30 to about 0.55;
wherein at least a portion of the uncurled length of the curl spring can engage the first material of the holder when passing into the holder with a first frictional resistance and wherein the bearing surface provides a second frictional resistance, based on the second coefficient of friction and greater than the first frictional resistance of the holder body, to an uncurling of the curl spring when the at least a portion of the uncurled length of the curl spring is passing out of the holder and thereby resists sash drop.
2. The combination of claim 1 wherein the frictional material is permanently formed in the holder.
3. The combination of claim 1 wherein the frictional material is formed as a bearing surface member holding the bearing surface and operable to be separately inserted into the holder.
4. A method of reducing the tendency of a counterbalanced sash to drop when the sash is counterbalanced by a curl spring, the method comprising:
forming a holder engaging the curl spring with a bearing surface when the curl spring is uncurled due to lowering of the sash, the bearing surface being formed of a frictional material having a selected coefficient of friction;
selecting a bearing surface from one of a plurality of bearing surfaces each formed of a different frictional material with different coefficients of friction, wherein each of the plurality of bearing surfaces is insertable into the holder to create different resistances to uncurling of the curl spring; and
positioning the curl spring to engage with the frictional material of the bearing surface so that the bearing surface provides frictional resistance against uncurling of the curl spring, and thereby resists sash drop.
5. The method of claim 4 further comprising:
forming a bearing member including at least one of the plurality of the bearing surfaces separate from the holder and inserting the bearing member into the holder.
6. The method of claim 5,
wherein forming a bearing member including at least one of plurality of the bearing surfaces further includes forming a plurality of bearing members each including a different one of the plurality of bearing surfaces; and
selecting one of the plurality of bearing members having bearing surfaces each of frictional material with different coefficients of friction that are insertable into the holders to create different resistances to uncurling of the curl springs.
7. A method of counterbalancing window sashes in a weight range of heavy sash weights to light sash weights with a curl spring assembly having a single counterbalancing force, the method comprising:
moving a curl spring in a holder having the single counter balancing force;
selecting a bearing surface from a plurality of bearing surfaces each having different coefficients of friction, wherein each of the plurality of bearing surfaces is insertable into the holder to create different resistances to uncoiling of the curl spring; and
engaging curled coils of the curl springs of the assembly with a bearing surface while uncurling the curl spring during lowering of a window sash in the weight range to increase resistance to uncoiling of the curl springs, wherein the bearing surface is selected to have a coefficient of friction so that the curl spring assembly avoids drop of the heavier sash in the range without causing hop of the lighter sash in the range.
8. The method of claim 7 further comprising:
making the bearing surface separate from and insertable into the holder for the curl springs.
9. A combination of a curl spring, a curl spring holder used in a window sash counterbalance system, comprising:
a window sash having a mass and moveable between a lowered position and a raised position;
a curl spring having a single counterbalancing force; and
a curl spring holder including:
a body being formed of a material having a first coefficient of friction to hold curled coils of the curl spring and permit uncurled lengths of the curl spring to pass out of the curl spring holder, and
a bearing surface inserted into the body, the bearing surface selected from a plurality of bearing surfaces each formed of a different frictional material with a different coefficient of friction, wherein the bearing surface is operable to be engaged by the curled coils of the curl spring with a second force greater than the counterbalancing force when the window sash is moving to the lowered position, wherein the curl spring is uncurled when the window sash is lowered;
wherein the bearing surface is formed of a frictional material having a second coefficient of friction greater than the first coefficient of friction so that the bearing surface provides frictional resistance to uncurling of the curl spring and thereby resists drop of the window sash.
10. The combination of claim 9, further comprising:
a bearing member that defines the bearing surface.
11. The combination of claim 10, wherein the bearing member is formed of a resin.
12. The combination of claim 11, wherein the bearing member is formed separate from the body and is insertable into the body.
13. The combination of claim 11, wherein the bearing member is molded into the body.
14. The combination of claim 11, wherein the first coefficient of friction of the first the material of the body is in a range from about 0.20 to about 0.25.
15. The combination of claim 10, wherein the bearing surface is positioned in the body such that the curl spring has a greater pressure against the bearing surface when the window sash is being lowered than when the window sash is being raised.
16. The combination of claim 9, wherein the second coefficient of friction is within a range of 0.30 to 0.55.
17. A combination of a curl spring and a holder used in a window sash counterbalance system, the holder comprising:
a holder body being formed of a first material having a first coefficient of friction to hold curled coils of the curl spring and permit uncurled lengths of the curl spring to pass out of and into the holder; and
at least one bearing surface of the holder engaged by the curled coils of the curl spring substantially when a sash is lowered thereby uncurling the curl spring, the at least one bearing surface resulting in a second coefficient of friction within a range of about 0.30 to about 0.55;
wherein the uncurled coils of the curl spring can engage the first material of the holder when passing into the holder with a first frictional resistance based on the first coefficient of friction and the at least one bearing surface provides a second frictional resistance to an uncurling of the curl spring based on the second coefficient of friction when the coils of the curl spring are passing out of the holder and thereby resists sash drop.
18. The combination of claim 17 wherein the at least one bearing surface is formed of a frictional material that is permanently formed in the holder.
19. The combination of claim 18 wherein the frictional material is formed as a bearing surface member holding the bearing surface and operable to be separately inserted into the holder.
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 mobile communication terminal comprising:
a terminal housing including a microphone hole formed on an outer surface of the housing, the microphone hole extending through the housing in a first direction;
a microphone installed within the terminal housing and having a sound receiving part configured to receive sound from a second direction different from the first direction; and
a sound collecting part disposed between the microphone hole and the sound receiving part having a channel with a first opening facing the first direction and a second opening facing the second direction.
2. The mobile communication terminal of claim 1, wherein the second direction is perpendicular to the first direction.
3. The mobile communication terminal of claim 1, wherein a cross sectional area of the sound collecting part is reduced to allow sound coming along the first direction to concentrate sound as it goes in the first direction.
4. The mobile communication terminal of claim 1, wherein the sound collecting part is formed to concentrate sound as sound goes in the first direction.
5. The mobile communication terminal of claim 1, wherein a receiver unit is located at the opposite side of the microphone hole.
6. The mobile communication terminal of claim 1, wherein a display and a receiver are disposed on a front surface of the housing.
7. The mobile communication terminal of claim 6, wherein a sensor unit configured to sense a touch is disposed between the display and the housing.
8. The mobile communication terminal of claim 1, wherein at least one input unit is provided on one surface of the housing.
9. The mobile communication terminal of claim 6, wherein at least one input unit is further provided on a lower end of the display.
10. The mobile communication terminal of claim 1, wherein a circuit board is provided within the terminal housing, and a microphone is disposed on the circuit board.
11. The mobile communication terminal of claim 10, wherein the sound receiving part is disposed to be in contact with the circuit board.
12. The mobile communication terminal of claim 10, wherein the circuit board includes a through hole, and the through hole includes a microphone mounting portion formed in the second direction to allow sound to go in the second direction so as to be directed to the sound receiving part of the microphone.
13. The mobile communication terminal of claim 12, wherein the microphone mounting portion is formed to be protruded from the circuit board, and the sound collecting part includes edge portions to surround the microphone mounting portion.
14. The mobile communication terminal of claim 13, wherein the channel includes a first channel to guide sound in the first direction and a second channel to guide sound in the second direction.
15. The mobile communication terminal of claim 14, further comprising:
a support face formed to be parallel to the circuit board, and
the sound collecting part comprises:
a first wall portion configured to form the first channel and having a lower surface attached to the support face; and
a second wall portion configured to form the second channel and having an upper surface attached to the circuit board.
16. The mobile communication terminal of claim 1, wherein the sound collecting part is made of a soft rubber or a plastic material.
17. The mobile communication terminal of claim 1, wherein the frame member comprises a support face formed to be horizontal at a lower portion of the microphone hole, and the sound collecting part is supported by the support face.
18. The mobile communication terminal of claim 17, wherein the support face comprises a holding line portion, and the sound collecting part is attached to the holding line portion.
19. A mobile communication terminal comprising:
a terminal housing;
a microphone hole formed on an outer surface of a frame member to guide sound in a first direction;
a microphone installed within the terminal housing and having a sound receiving part configured to receive sound from a second direction different from the first direction; and
a sound collecting part disposed between the microphone hole and the sound receiving part and guiding a sound which has passed through the microphone hole to the sound receiving part by causing the sound to change direction.
20. The mobile communication terminal of claim 19, wherein the second direction is perpendicular to the first direction.
21. The mobile communication terminal of claim 19, wherein a cross sectional area of the sound collecting part is reduced along the first direction.
22. The mobile communication terminal of claim 19, wherein the sound collecting part is formed to concentrate sound as sound goes in the first direction.
23. The mobile communication terminal of claim 19, wherein a receiver unit is located at the opposite side of the microphone hole.
24. The mobile communication terminal of claim 19, further comprising:
a circuit board formed within the terminal housing, and the microphone is disposed on the circuit board.
25. The mobile communication terminal of claim 24, wherein the sound receiving part is disposed to be in contact with the circuit board.
26. The mobile communication terminal of claim 24, wherein the circuit board includes a through hole, and the through hole includes a microphone mounting portion formed in the second direction to allow sound to go in the second direction so as to be directed to the sound receiving part of the microphone.
27. The mobile communication terminal of claim 23, wherein the sound collecting part includes a first channel to guide sound in the first direction and a second channel to guide a-sound in the second direction.
28. The mobile communication terminal of claim 27, further comprising:
a support face formed to be parallel to the circuit board, and
the sound collecting part comprises:
a first wall portion configured to form the first channel and having a lower surface attached to the support face; and
a second wall portion configured to form the second channel and having an upper surface attached to the circuit board.
29. A sound guide of a mobile communication terminal having a microphone disposed on an internal circuit board, the sound guide comprising:
a sound collecting part disposed on one surface of the circuit board,
wherein the sound collecting part comprises:
a first wall portion to guide sound in a first direction; and
a second wall portion to guide sound to a sound receiving part of the microphone in a second direction different from the first direction.
30. The sound guide of claim 29, wherein the second direction is perpendicular to the first direction.
31. The sound guide of claim 29, wherein a cross sectional area of the sound collecting part is reduced to allow sound coming along the first direction to be concentrated as it goes in the first direction.
32. The sound guide of claim 29, wherein the sound collecting part is formed to be concentrated as sound goes in the first direction.
33. The sound guide of claim 29, wherein the sound collecting part is made of a soft rubber or a plastic material.
34. The sound guide of claim 29, wherein the sound collecting part comprises:
a first wall portion forming the first wall portion; and
a second wall portion forming the second wall portion.
35. The sound guide of claim 34, wherein the sound collecting part comprises an edge portion extending from the second wall portion, and the extending edge portion is formed such that it tightly attaches the second wall portion to the circuit board.
36. A sound guide of a mobile communication terminal including a terminal housing having a microphone hole formed on its outer surface to internally guide sound in a first direction and a microphone disposed on a circuit board provided within the terminal housing, wherein a sound receiving part of the microphone is formed to receive sound in a second direction different from the first direction, the sound guide comprising:
a sound collecting part disposed on one surface of the circuit board,
wherein the sound collecting part comprises:
a first wall portion to guide sound which has passed through the microphone hole in the first direction; and
a second wall portion to guide sound to the sound receiving portion in the second direction different from the first direction.
37. The sound guide of claim 36, wherein the second direction is perpendicular to the first direction.
38. The sound guide of claim 36, wherein a cross sectional area of the sound collecting part is reduced along the first direction.
39. The sound guide of claim 36, wherein the sound collecting part is formed to concentrate sound as sound goes in the first direction.