Abstract: A removal apparatus of a threaded post contains: a drive rod, a connection element, an actuation element, and a slidable sleeve. The connection element includes a locking groove and a notch. The actuation element includes a fitting fringe corresponding to the connection element, a cylindrical neck having a diameter less than a diameter of the fitting fringe, and an engagement disc having a diameter more than the diameter of the cylindrical neck. The diameter of fitting fringe is equal to a diameter of the connection element. The slidable sleeve includes a coupling space having a diameter equal to the diameter of the fitting fringe and the diameter of the connection element. The slidable sleeve is slid so that the coupling space abuts against the fitting fringe and the connection element, and the engagement disc is engaged in the locking groove.

Abstract: A removal apparatus of a threaded post contains: a drive rod, a connection element, an actuation element, and a slidable sleeve. The connection element includes a locking groove and a notch. The actuation element includes a fitting fringe corresponding to the connection element, a cylindrical neck having a diameter less than a diameter of the fitting fringe, and an engagement disc having a diameter more than the diameter of the cylindrical neck. The diameter of fitting fringe is equal to a diameter of the connection element. The slidable sleeve includes a coupling space having a diameter equal to the diameter of the fitting fringe and the diameter of the connection element. The slidable sleeve is slid so that the coupling space abuts against the fitting fringe and the connection element, and the engagement disc is engaged in the locking groove.

Abstract: A switch structure of a hand tool contains: a body including an accommodation tube, a drive member, and a torque adjustment mechanism. The drive member is rotated in a first end of the accommodation tube, and the torque adjustment mechanism is arranged on a second end of the accommodation tube and abuts against the drive member so as to adjust a desired torque value. The drive member includes a positioning element extending from a second end of the drive member, and the positioning element has an outer diameter more than an outer diameter of the accommodation tube, the positioning element further has an engagement face formed on a first surface of the positioning element adjacent to the drive member. A control sleeve is fitted with the first end of the accommodation tube and is moved to a unlock position or a lock position by a user.

Abstract: A successive approximation register (SAR) analog to digital converter (ADC) and a method of detecting an offset of a comparator are introduced. The SAR ADC includes a switch circuit, a comparator and a calibration circuit. The switch circuit is configured to perform a swapping operation on a first intermediate analog signal and a second intermediate analog signal to generate a first swapped analog signal and a second swapped analog signal. The comparator is coupled to the switching circuit and is configured to compare the first intermediate analog signal and the second intermediate analog signal before the swapping operation to generate a least-significant-bit value. The comparator is further configured to compare the first swapped analog signal and the second swapped analog signal after the swapping operation to generate a calibration bit value. The calibration circuit is configured to determine whether the comparator has an offset according to the least-significant-bit value and the calibration bit value.

Abstract: A successive approximation register (SAR) analog to digital converter (ADC) and a method of detecting an offset of a comparator are introduced. The SAR ADC includes a switch circuit, a comparator and a calibration circuit. The switch circuit is configured to perform a swapping operation on a first intermediate analog signal and a second intermediate analog signal to generate a first swapped analog signal and a second swapped analog signal. The comparator is coupled to the switching circuit and is configured to compare the first intermediate analog signal and the second intermediate analog signal before the swapping operation to generate a least-significant-bit value. The comparator is further configured to compare the first swapped analog signal and the second swapped analog signal after the swapping operation to generate a calibration bit value. The calibration circuit is configured to determine whether the comparator has an offset according to the least-significant-bit value and the calibration bit value.

Abstract: A quick lock assembly contains: a locker and a drive socket. The locker includes two clamp elements and a C flexible retainer, each clamp element has a semicircular clamping portion, a press extension, and a rotatable connection portion. The semicircular clamping portion has two semicircular grooves so that when the two clamp elements are connected, two circular orifices are formed by four semicircular grooves of the two clamp elements. Each semicircular groove has inner threads so that when the two clamp elements are connected, the four semicircular grooves retain with a screw rod, and inner threads of the four semicircular grooves screw with outer threads of the screw rod. The C flexible retainer retains the two semicircular clamping portions. The drive socket includes a fitting portion and a driving portion, the fitting portion has an accommodation chamber with a recess, and the driving portion has an aperture.

Abstract: A quick connect nut contains: a body including a first locking part, a second locking part, and a flexible C-shaped retainer. The first locking part includes a first forcing face, a first tilted face, a first peripheral groove, a first semicircular orifice having first inner threads, at least one first protrusion, and at least one first arcuate notch. The second locking part includes a second forcing face, a second tilted face, a second peripheral groove, a second semicircular orifice having second inner threads, at least one second protrusion, at least one second arcuate notch, and a second through hole. When the first and second locking parts lock together, an angle is defined between the first and second tilted faces so that a width of an expanding opening between the first and second locking parts is more than an outer diameter of the threaded rod.

Abstract: A quick lock assembly contains: a locker and a drive socket. The locker includes two clamp elements and a C flexible retainer, each clamp element has a semicircular clamping portion, a press extension, and a rotatable connection portion. The semicircular clamping portion has two semicircular grooves so that when the two clamp elements are connected, two circular orifices are formed by four semicircular grooves of the two clamp elements. Each semicircular groove has inner threads so that when the two clamp elements are connected, the four semicircular grooves retain with a screw rod, and inner threads of the four semicircular grooves screw with outer threads of the screw rod. The C flexible retainer retains the two semicircular clamping portions. The drive socket includes a fitting portion and a driving portion, the fitting portion has an accommodation chamber with a recess, and the driving portion has an aperture.

Abstract: A quick connect nut contains: a body including a first locking part, a second locking part, and a flexible C-shaped retainer. The first locking part includes a first forcing face, a first tilted face, a first peripheral groove, a first semicircular orifice having first inner threads, at least one first protrusion, and at least one first arcuate notch. The second locking part includes a second forcing face, a second tilted face, a second peripheral groove, a second semicircular orifice having second inner threads, at least one second protrusion, at least one second arcuate notch, and a second through hole. When the first and second locking parts lock together, an angle is defined between the first and second tilted faces so that a width of an expanding opening between the first and second locking parts is more than an outer diameter of the threaded rod.

Abstract: An oil seal holder for a shock absorber contains: a body, plural push members, and plural resilient elements. The body includes a first semi-circular ring and a second semi-circular ring, and a rear end of the first semi-circular ring is connected with a rear end of the second semi-circular ring. The body also includes a retainer configured to retain with or remove from a front end of the first semi-circular ring and a front end of the second semi-circular ring. The plural push members are mounted and radially move on the first semi-circular ring and the second semi-circular ring, and each push member includes an abutting post extending out of the first semi-circular ring or the second semi-circular ring. The plural resilient elements are connected with the first semi-circular ring and the second semi-circular ring so as to push the plural push member inward.

Abstract: A data receiver for a double data rate (DDR) memory includes a first stage circuit and a second stage circuit. The first stage circuit is deployed for receiving a single-ended signal from the DDR memory and converting the single-ended signal into a pair of differential signals. The second stage circuit, coupled to the first stage circuit, is deployed for receiving the differential signals from the first stage circuit and converting the differential signals into an output signal. Both of the first stage circuit and the second stage circuit are implemented in a core voltage domain.

Abstract: An oil seal holder for a shock absorber contains: a body, plural push members, and plural resilient elements. The body includes a first semi-circular ring and a second semi-circular ring, and a rear end of the first semi-circular ring is connected with a rear end of the second semi-circular ring. The body also includes a retainer configured to retain with or remove from a front end of the first semi-circular ring and a front end of the second semi-circular ring. The plural push members are mounted and radially move on the first semi-circular ring and the second semi-circular ring, and each push member includes an abutting post extending out of the first semi-circular ring or the second semi-circular ring. The plural resilient elements are connected with the first semi-circular ring and the second semi-circular ring so as to push the plural push member inward.

Abstract: A tube joint that can be used as a volume control valve, air sprayer or/and a T-tube. The multifunction tube joint mainly contains: an elongated body, a revolving valve, a stem, a branch, a piston valve rod, a button and a spring. The elongated body contains: a main channel longitudinally therethrough, a protrusion thereon and a tunnel vertically therethrough. The protrusion has a receptacle therein communicated with the main channel. The revolving valve is rotably received through the tunnel. The revolving valve has a controlling channel vertically therethrough. The controlling channel is communicable to the main channel. The stem is connected to the receptacle. The stem has a stem channel therein, communicable with the main channel. The branch is connected to the stem. The branch has a branch channel therein communicated with the stem channel of the stem. The piston valve rod is slidably received in the stem channel of the stem with a first end extended out thereof.

Abstract: A drive wrench structure includes a drive handle provided with a threaded rod which is provided with a guide rod, and a mounting stud having a first side formed with a screw bore screwed on the threaded rod of the drive handle, and a second side formed with a through hole for passage of the guide rod of the drive handle. The guide rod of the drive handle may protrude outward from the through hole of the mounting stud when in use, and may be retracted into and fully hidden in the through hole of the mounting stud when not in use, thereby protecting the guide rod of the drive handle, and thereby facilitating storage of the drive wrench structure.

Abstract: A string cutter includes two handles, two fixing devices, and a cutting string. The cutting string has two ends each secured on the respective handle by the respective fixing device. Each of the two handles includes a loop-shaped handgrip for insertion and holding of a user's fingers. The handgrip has two sides each provided with a protection rib, for encompassing and protecting the user's fingers received in the handgrip. Thus, when the cutting string is broken due to wear or excessive pull and is sprung toward thehandles, the broken cutting string will be blocked and stopped by the protection rib of each of the two handles, thereby efficiently preventing the broken cutting string from injuring the user's fingers, so as to protect the user's safety.

Abstract: A elastic magnetic socket wrench connector device which contains: first tube with first magnet fixed at first end and an inward stop around second end; and second tube sliding through the second end with one end inside said first tube, the inside end has a flange and with second magnet fixed at outside end; said inward stop preventing said flange from sliding off said first tube and the first magnet and said second magnet are of the same magnetic poles. The first magnet has stronger magnetic force than that of said second magnet. The device can attract a bolt preventing from it fall to the ground and the length of the device can be adjusted to fit different kinds of socket wrenches and sockets.

Abstract: A string cutter includes two handles, two fixing devices, and a cutting string. The cutting string has two ends each secured on the respective handle by the respective fixing device. Each of the two handles includes a loop-shaped handgrip for insertion and holding of a user's fingers. The handgrip has two sides each provided with a protection rib, for encompassing and protecting the user's fingers received in the handgrip. Thus, when the cutting string is broken due to wear or excessive pull and is sprung toward the handles, the broken cutting string will be blocked and stopped by the protection rib of each of the two handles, thereby efficiently preventing the broken cutting string from injuring the user's fingers, so as to protect the user's safety.

Abstract: A elastic magnetic socket wrench connector device which contains: first tube with first magnet fixed at first end and an inward stop around second end; and second tube sliding through the second end with one end inside said first tube, the inside end has a flange and with second magnet fixed at outside end; said inward stop preventing said flange from sliding off said first tube and the first magnet and said second magnet are of the same magnetic poles. The first magnet has stronger magnetic force than that of said second magnet. The device can attract a bolt preventing from it fall to the ground and the length of the device can be adjusted to fit different kinds of socket wrenches and sockets.