All The Claims

1. A semiconductor memory device comprising:
a source strobe signal generating unit configured to generate a source strobe signal having a first or a second activation width corresponding to a normal mode and a bank grouping mode;
a final strobe signal generating unit configured to, in the normal mode, expand the first activation width and generate a final strobe signal having the expanded first activation width, and in the bank grouping mode, maintain the second activation width and generate the final strobe signal having the second activation width; and
a sense amplifying unit configured to sense, amplify and output data applied through a data line in response to the final strobe signal.
2. The semiconductor memory device as recited in claim 1, further comprising a driving unit that drives a global data line in response to an output signal of the sensing amplifying unit.
3. The semiconductor memory device as recited in claim 1, wherein the second activation width is wider than the first activation width.
4. The semiconductor memory device as recited in claim 1, wherein an activation width of the final strobe signal is shorter than a minimum separation time between a column command and a following column command.
5. The semiconductor memory device as recited in claim 1, wherein the final strobe signal generating unit includes:
an expanding unit configured to expand an activation width of the source strobe signal to generate an expanded output signal; and
a multiplexing unit configured to output a source strobe signal or the expanded output signal of the expanding unit as the final strobe signal in response to the bank grouping mode.
6. The semiconductor memory device as recited in claim 5, wherein the expanding unit expands a deactivation time of the source strobe signal.
7. The semiconductor memory device as recited in claim 5, wherein the expanding unit includes:
a first driving unit configured to be driven corresponding to an activation edge of the source strobe signal; and
a second driving unit configured to be driven corresponding to a deactivation edge of the source strobe signal,
wherein a loading value of the first driving unit is smaller than a loading value of the second driving unit.
8. A method for driving a semiconductor memory device, comprising:
expanding an activation width of a source strobe signal having a first activation width corresponding to a normal mode and outputting the source strobe signal having an expanded first activation width as a final strobe signal;
maintaining a second activation width of the source strobe signal corresponding to a bank grouping mode and outputting the source strobe signal having the second activation width as the final strobe signal; and
sensing, amplifying and outputting data in response to the final strobe signal.
9. The method as recited in claim 8, further comprising: generating the source strobe signal having the first activation width corresponding to the normal mode; and
generating the source strobe signal having the second activation width corresponding to the bank grouping mode.
10. The method as recited in claim 8, wherein the second activation width is wider than the first activation width.
11. The method as recited in claim 8, wherein an activation width of the final strobe signal is shorter than a minimum separation time between a column command and a following column command.
12. The method as recited in claim 8, wherein the step of generating the final strobe signal includes:
expanding the activation width of the source strobe signal;
and selectively outputting the source strobe signal or the expanded source strobe signal as the final strobe signal in response to the bank grouping mode.
13. The method as recited in claim 12, wherein the expansion of the activation width of the source strobe signal is acquired by expanding a deactivation time of the source strobe signal.
14. A data sense amplifying circuit comprising:
a pulse width expansion unit configured to generate an inputoutput sense amplifying strobe signal by expanding an activation width of a received main strobe signal; and
a sense amplifying unit configured to amplify and output the data applied to a local data line in response to the inputoutput sense amplifying strobe signal.
15. The data sense amplifying circuit as recited in claim 14, wherein the pulse width expansion unit expands a deactivation time of the main strobe signal.
16. The data sense amplifying circuit as recited in claim 14, wherein an activation width of the inputoutput sense amplifying strobe signal is shorter than a minimum separation time between a column command and a following column command.
17. The data sense amplifying circuit as recited in claim 14, wherein the pulse width expansion unit includes:
a first driving unit configured to be driven corresponding to an activation edge of the main strobe signal; and
a second driving unit configured to be driven corresponding to a deactivation edge of the main strobe signal,
wherein a loading value of the first driving unit is smaller than a loading value of the second driving unit.
18. A semiconductor memory device comprising:
a source strobe signal generating unit configured to generate a source strobe signal having a first pulse width in response to a read command;
a final strobe signal generating unit configured to, during the normal mode, generate a final strobe signal having the first activation pulse width, and during the bank grouping mode, expand the first activation pulse width and generate the final strobe signal having the expanded activation pulse width; and
a sense amplifying unit configured to sense, amplify and output data applied through a data line in response to the final strobe signal.
19. The semiconductor memory device as recited in claim 18, further comprising a driving unit that drives a global data line in response to an output signal of the sensing amplifying unit.

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 semiconductive rubber composition containing:
a rubber content containing at least copolymer rubber containing ethylene oxide as a copolymeric component and chloroprene rubber; and
not less than 0.5 parts by mass and not more than 1.5 parts by mass of a thiourea-based vulcanization accelerator, not less than 0.5 parts by mass and not more than 1.5 parts by mass of a guanidine-based vulcanization accelerator and not less than 0.5 parts by mass and not more than 2.0 parts by mass of a peroxide-based crosslinking agent with respect to 100 parts by mass of the sum of the rubber content.
2. The semiconductive rubber composition according to claim 1, wherein
the copolymer rubber is at least one type selected from the group consisting of epichlorohydrin-ethylene oxide copolymer rubber and epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer rubber.
3. The semiconductive rubber composition according to claim 1, wherein
the rubber content also contains acrylonitrile-butadiene copolymer rubber.
4. A semiconductive rubber roller made of a semiconductive rubber composition containing:
a rubber content containing at least copolymer rubber containing ethylene oxide as a copolymeric component and chloroprene rubber; and
not less than 0.5 parts by mass and not more than 1.5 parts by mass of a thiourea-based vulcanization accelerator, not less than 0.5 parts by mass and not more than 1.5 parts by mass of a guanidine-based vulcanization accelerator and not less than 0.5 parts by mass and not more than 2.0 parts by mass of a peroxide-based crosslinking agent with respect to 100 parts by mass of the sum of the rubber content.
5. The semiconductive rubber roller according to claim 4, wherein
the copolymer rubber is at least one type selected from the group consisting of epichlorohydrin-ethylene oxide copolymer rubber and epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer rubber.
6. The semiconductive rubber roller according to claim 4, wherein
the rubber content also contains acrylonitrile-butadiene copolymer rubber.

1. A power tool having a clamping device for a working element, comprising:
an output shaft for driving the working element;
a fastening piece having a flange portion for clamping the working element and a protruding shaft substantially perpendicular to the flange portion;
a locking assembly comprising a locking member, the locking member having a first position in which the protruding shaft is locked and a second position in which the protruding shaft is loosened;
a pressing member comprising a biasing element acting on the pressing member for biasing the pressing member toward the flange portion, wherein the working element can be pressed between the pressing member and the flange portion when the locking member is in the first position; and
an operation device for moving the pressing member toward a direction to overcome the force exerted by the biasing element.
2. The power tool having the clamping device for the working element according to claim 1, wherein the locking member can move between the first position and the second position and the locking member moving direction is substantially perpendicular to the protruding shaft.
3. The power tool having the clamping device for the working element according to claim 2, wherein the power tool further comprises a movable device for moving the locking member.
4. The power tool having the clamping device for the working element according to claim 3, wherein the movable device is partially arranged on the pressing member.
5. The power tool having the clamping device for the working element according to claim 4, wherein the locking assembly further comprises:
an intermediate element that can abut against on the locking member, and the pressing member is provided with a first position (A) and a second position (B), and there is a height difference between the first position (A) and the second position (B) in the radial direction perpendicular to the protruding shaft, and the intermediate element is selectively placed on the first position A or the second position (B).
6. The power tool having the clamping device for the working element according to claim 5, wherein the intermediate element is a steel ball or a cylindrical pin.
7. The power tool having the clamping device for the working element according to claim 6, wherein the radial height difference between the first position (A) and the second position (B) on the pressing member is configured as at least one of a stepped plane or a groove.
8. The power tool having the clamping device for the working element according to claim 1, wherein the biasing element comprises a first spring.
9. The power tool having the clamping device for the working element according to claim 1, wherein the operation device comprises a lever element rotatable about a pivot shaft, and one end of the lever element abuts against a cam spanner and the other end thereof selectively abuts against an actuating portion provided on the pressing member.
10. The power tool having the clamping device for the working element according to claim 1, wherein the operation device comprises a rotatable shaft and an operation element for rotating the rotatable shaft about the axis thereof, and the rotatable shaft is provided with an eccentric convex surface which can selectively abut against or disengage from the actuating portion arranged on the pressing member.
11. The power tool having the clamping device for the working element according to claim 1, wherein the locking member and the protruding shaft are respectively provided with formed locking structures for matching with each other.
12. The power tool having the clamping device for the working element according to claim 11, wherein the formed locking structures comprise a toothed portion arranged on the protruding shaft and a matching toothed portion arranged on the locking member.
13. The power tool having the clamping device for the working element according to claim 12, wherein an elastic element acts on the locking member and biases the locking member toward a direction (D) in which the protruding shaft is inserted into a cavity.
14. The power tool having the clamping device for the working element according to claim 1, wherein a projection is formed on an end surface mated with the flange portion.
15. The power tool having the clamping device for the working element according to claim 1, wherein the power tool further comprises a disengagement-proof element for preventing the protruding shaft from falling out of the cavity.
16. The power tool having the clamping device for the working element according to claim 1, wherein the locking assembly further comprises:
a locking shaft connected with the output shaft, the locking shaft being provided with a first groove mated with the locking member, wherein the locking member is at a first end of the first groove when the locking member is at a first position to lock the protruding shaft; and
the locking member is at a second end of the first groove when the locking member is at a second position to loosen the protruding shaft.
17. The power tool having the clamping device for the working element according to claim 16, wherein a slidable sleeve is enclosed outside of the locking shaft and is provided with a second groove which is mated with the locking member and drives the locking member to move between the first end and the second end.
18. The power tool having the clamping device for the working element according to claim 17, wherein a second spring acts on the slidable sleeve, and the pressing member can abut against the slidable sleeve such that the slidable sleeve moves in a direction to overcome the spring force of the second spring.
19. The power tool having the clamping device for the working element according to claim 16, wherein the power tool further comprises an operation spanner which cooperates with the biasing element such that the pressing member moves along the direction of the axis of the output shaft.
20. The power tool having the clamping device for the working element according to claim 19, wherein the operative spanner contacts with or disengages from the pressing member selectively.
21. The power tool having the clamping device for the working element according to claim 20, wherein the operation spanner is hinged to a housing of the power tool.
22. The power tool having the clamping device for the working element according to claim 20 wherein an elastic support is arranged between the operation spanner and the housing of the power tool.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

What is claimed is:

1. A method for performing an electronic card enabled transaction in a point of sale (POS) system having a self-service facility electronically connected to a card authorization center via a public network, the self-service facility including a card transaction terminal, the method comprising the acts of:
(a) requesting an approval-before-the-transaction (ABCT) of the authorization center for setting a virtual transaction amount (VTA) at the self-service facility;
(b) determining whether the transaction is valid or not by validating the card and a corresponding account at the authorization center;
(c) approving the VTA if it has been determined that the card and account are valid and responsively sending an approval signal to the self-service facility;
(d) executing the transaction at the self-service facility on the basis of the approval signal if the VTA is approved;
(e) requesting an approval-after-the-card-transaction (AACT) of the authorization center for setting an actual transaction amount (ATA) on the basis of the actual executed transaction;
(f) revalidating the VTA into the ATA at the authorization center and sending a confirmation signal to the self-service facility; and
(g) initializing the self-service facility for a next transaction and issuing a receipt for the actual executed transaction.
2. The method of claim 1 wherein the VTA is a maximum anticipated transaction amount which can be set for a particular one-time transaction.
3. The method of claim 2 wherein the maximum anticipated transaction amount is determined by attributes of an item or service to be provided in the transaction.
4. The method of claim 3 wherein the item or service is one for which a payment amount can not be determined before the actual transaction is executed.
5. The method of claim 3 wherein the attributes comprise at least one of: a physical amount of the item; availability of the item or service; and a service time.
6. The method of claim 1 further comprising, before said act (a), the acts of:
reading the card in the card transaction terminal of the self service facility; and
identifying a user using a entered personal identification number.
7. The method of claim 1 further comprising the acts of:
denying the VTA if it has been determined that one of the card and account are invalid; and
responsively sending an approval failure signal to the self-service facility.
8. The method of claim 1 further comprising canceling the ABCT for the VTA after one of act (a), (b), and (c).
9. The method of claim 1 wherein the ATA is prevented from exceeding the VTA.
10. A method for performing an electronic card enabled transaction in a point of sale (POS) system having a self-service facility electronically connected to a card authorization center via a public network, the self-service facility including a card transaction terminal, the method comprising the acts of:
(a) requesting an approval-before-the-transaction (ABCT) of the authorization center for setting a virtual transaction amount (VTA) at the self-service facility;
(b) validating the card and a corresponding account at the authorization center;
(c) approving the VTA if it has been determined that the card and account are valid and responsively sending an approval signal to the self-service facility, the approved VTA being the lesser of: (1) a target VTA related to anticipated parameters of the transaction; and (2) a value related to an available amount in said account;
(d) executing the transaction at the self-service facility on the basis of the approval signal if the VTA is approved and including restricting such execution to prevent an actual transaction amount (ATA) from exceeding the approved VTA;
(e) requesting an approval-after-the-card-transaction (AACT) of the authorization center for setting the ATA on the basis of the actual executed transaction; and
(f) initializing the self-service facility for a next transaction and issuing a receipt for the actual executed transaction.