Abstract: A portable computer that is configurable between a plurality of display modes including a laptop mode (in which the portable computer has a conventional laptop appearance) and an easel mode in which the base of the computer and its display component stand vertically forming an inverted “V.” The portable computer includes a hinge assembly that couples the display component to the base of the computer, and allows the display component to be rotated about an axis along an interface between the display component and the base to configure the portable computer between a closed position, the laptop mode and the easel mode.

Abstract: An intermittent lifting assembly, configured to drive a heat dissipation panel of the mobile terminal to open and close. The intermittent lifting assembly includes: a first driving piece that includes a first intermittent gear and a convex shoulder disposed on the first intermittent gear; a second driving piece that includes a second intermittent gear engaged with the first intermittent gear, where a position-limiting slot is disposed on the second intermittent gear, the position-limiting slot is configured to limit a position in which the convex shoulder rolls when teeth of the first intermittent gear and teeth of the second intermittent gear are out of an engaged state; and a gap for avoiding the second intermittent gear is disposed on the convex shoulder; and further includes a swing rod that is fastened to the second intermittent gear and configured to drive the heat dissipation panel to open or close.

Abstract: A non-protruding connecting structure allowing zero to 360 degrees and any intermediate angle of relative rotation between two display screens includes a hinge assembly, a first shaft body, a second shaft body, and a fixing member. The hinge assembly includes first and second wheels sleeved on first and second shaft bodies, and an enmeshed worm engaged with the first and second wheels. A central axis of the first wheel is parallel to that of the second wheel. The axis of the worm is perpendicular to that of the first and second wheels. A rotation direction of the first wheel is opposite to that of the second wheel. The fixing member fixes the hinge assembly. An electronic device including the connecting structure is also disclosed.

Abstract: The present disclosure is directed at automatically opening hinged components of computing devices. One of the computing device and a hinged component may include an electrical winding or coil while the other may include a magnet. When current is applied to the electrical winding (e.g., in a direction opposite of the North/South direction of the magnets' magnetic field), the electrical winding may generate a magnetic field opposite that repels the magnet's magnetic field. The magnetic repulsion may cause the hinged component to separate from the rest of the computing device, thereby opening the hinged component. When the current is removed from the electrical winding, the electrical winding may no longer generate a magnetic field, enabling the hinged component to be closed.

Abstract: A display device including: a display module; a first support part and a second support part which are disposed under the display module and spaced apart from each other in a first direction; a first gear connected to each of both sides of the first support part which are opposite each other in a second direction crossing the first direction; and a second gear connected to each of both sides of the second support part which face each other in the second direction, where the second gear is disposed adjacent to the first gear in the first direction and engaged with the first gear. When viewed in the second direction, each of the first gear and the second gear has a shape corresponding to at least a portion of an elliptical shape.

Abstract: A hinge structure includes: a base having an axial hole whose an inner wall has positioning concave portions; at least one torque element, disposed in the axial hole and includes a torque providing portion and positioning convex portions; and a rotation shaft, passing through the through hole. The torque providing portion surrounds a central axis of the axial hole to form a through hole, the torque providing portion has a fracture adjacent to the through hole, and the positioning convex portions are connected to the torque providing portion and correspond to the positioning concave portions respectively. The torque providing portion and the positioning convex portions are located on a same virtual plane perpendicular to the center axis. A first virtual straight line on the virtual plane passes through the fracture and the center axis, and at least some positioning convex portions are not located on the first virtual straight line.

Abstract: The disclosure relates to a rotating module and an electronic device. The rotating module includes a support, a rotating member, and an elastic damping member. The rotating member includes a first rotating member and a second rotating member connected to the support respectively. A first end of the damping member is fixed to the support. A second end of the damping member is in contact with the rotating member for providing a damping force for relative rotation of the first rotating member and the second rotating member. The second end is an opposite end of the first end. The support is located between the rotating member and the damping member.

Abstract: A hinged mobile computing device includes a first housing part and a second housing part coupled by a hinge assembly having a harness, a harness cover, a first hinge body, and a second hinge body. The harness is configured to accommodate flexible printed circuitry and a cable that extend from the first housing part to the second housing part via the hinge assembly. The hinge bodies include respective friction bands, each friction band being configured to engage a respective shaft formed on the harness and having a gear configured to mesh with a respective cog arranged within the harness cover to coordinate a timing of the rotation of the first and second housing parts between face-to-face and back-to-back orientations. The hinge assembly further includes a spring-loaded opening mechanism.

Abstract: The embodiments disclose an apparatus including a television monitor mount with a foldout portion and a predefined main body, a constant torque hinge on a plate having at least one handle configured to be affixed to a structure that can hold other plates and either contains or holds at least one device, VESA mounting holes or equivalent hole configurations with lockable positions using a locking mechanism, and wherein the foldout portion of the mount along with the main body is configured to mount to other mounts or similar devices.

Abstract: A head-up display apparatus in which display light emitted by a display device to express an image is reflected by a reflecting part, and a virtual image corresponding to the reflected image is displayed. The apparatus includes: a reflecting-part holder provided with a pair of rotary shaft parts protruding at both ends thereof, the rotary shaft parts retaining the reflecting part; a pair of bearings rotatably supporting the pair of rotary shaft parts; and a pair of bearing holders retaining the pair of bearings in a housing; first supported parts protruding in the radial direction of the bearings provided to the bearing holders, and the housing provided with a hole-shaped first support part in which the first supported part of one bearing holder is positioned, and an elongated-hole-shaped second support part elongated in an axial direction in which the first supported part of the other bearing holder is positioned.

Abstract: A variable torque opening hinge joint for a laptop may comprise a shaft having a protrusion along its axial length and operably connecting to a display chassis inserted through a first hinge joint and a second hinge joint that are operably connected to a base chassis. The first hinge joint may apply a constant torque resistive to a rotation of the shaft throughout a range of angular displacement, and the second hinge joint may apply a variable torque resistive to a rotation of the shaft that increases from a minimum variable resistive torque to a maximum variable resistive torque over a preset subset of the range of angular displacement to reach a maximum variable torque. A leading edge of the protrusion and a trailing edge of the protrusion may be separated by an angle equivalent to the preset subset of the range of angular displacement.

Abstract: Examples herein relate to an apparatus. In some examples, an apparatus can include a first bracket connected to a first shaft, a second bracket connected to the first bracket, a variable torque bar connected to the first bracket and to a second shaft. The variable torque bar includes a plurality of notches to engage a tensioner mechanism and alter an amount of torque applied to the first shaft when the tensioner mechanism engages the respective notches of the plurality of notches.

Abstract: The present disclosure provides an electronic device. The electronic device includes a first body including a display module for displaying content; and a second body coupled with the first body and including a first processor for generating the displayed content. The second body includes a first opening as a part of a first airflow path for dissipating heat generated by the first processor; and the first opening faces toward the first body.

Abstract: A notebook computer includes a display screen, a base, a rotating shaft coupling the display screen and the base, and a rotating shaft support disposed at an inside of a housing of the display screen and coupled to the rotating shaft in an assembly manner. The notebook computer further includes a drive circuit board disposed inside the housing of the display screen. The rotating shaft support includes a first rotating shaft support and a second rotating shaft support. A projection of the drive circuit board and a projection of the first rotating shaft support do not overlap on a place on which the display screen is located, and the projection of the drive circuit board and a projection of the second rotating shaft support at least partially overlap on the plane on which the display screen is located.

Abstract: A hinge module includes a base, a torsional force providing structure, two axles, two brackets, and at least one fixing component. The base has at least one first concave. The torsional force providing structure is disposed in the base and has two torsional force providing portions. The two axles penetrate the two torsional force providing portions respectively. The two brackets are connected to the two axles respectively. The fixing component is disposed in the first concave and abuts the torsional force providing structure, such that the torsional force providing structure is fixed to the base. In addition, an electronic device including the hinge module is also provided.

Abstract: A biaxial hinge which can be downsized. The biaxial hinge includes a first main body, an intermediate body coupled to the first main body so that the intermediate body can rotate around a first shaft and a second main body coupled to the intermediate body so that the second main body can rotate around a second shaft which is parallel with the first shaft. Two laminated first friction plates are engaged with the first shaft. Two laminated second friction plates are engaged with the second shaft. The first main body supports the first shaft so that the first shaft cannot rotate. The second main body supports the second shaft so that the second shaft cannot rotate. The first friction plates and the second friction plates are contained in the intermediate body so that the first friction plates and the second friction plates cannot rotate.

Abstract: A pivoting mechanism includes a first hollow tube and a second hollow tube. The second hollow tube is rotatably sleeved on the first hollow tube to generate a torsion force with the first hollow tube. An electronic device is also provided.

Abstract: The disclosure relates to a drive assembly of a closure element assembly of a motor vehicle, wherein the drive assembly comprises a drive motor and, connected to the drive motor, a feed gearing for generating linear drive movements along a geometrical drive axis, wherein the drive motor and the feed gearing are arranged in a drive train of the drive assembly and the drive train extends between two mechanical drive connections for putting out drive movements and wherein the drive assembly comprises a brake for braking at least a portion of the drive train. It is proposed that the brake is designed such that the braking action of the brake is reduced with an increasing load in the drive train.

Abstract: The present disclosure provides an electronic device. The electronic device includes: a connection component; a first main body having a first end connected to the connection component; and a second main body having a second end connected to the connection component. In response to the first main body and the second main body being in a first relative position, a distance in a pre-set direction between the first end and the second end is a first distance. In response to the first main body and the second main body being in a second relative position, a distance in a pre-set direction between the first end and the second end is a second distance. The first distance and the second distance are different.

Abstract: An electronic device is provided, including a base, a display module, and a hinge mechanism. The hinge mechanism connects the base and the display module, and includes a fixed member, an elastic piece assembly, a rotating shaft, and a locking assembly. The fixed member is fixed to the base, and the elastic piece assembly is disposed on the fixed member and has a through slot. The rotating shaft is disposed through the fixed member and the elastic piece assembly, and is connected to the display module. The locking assembly is disposed through the elastic piece assembly. When the locking assembly is locked into the through slot in a first direction, the locking assembly drives the elastic piece assembly to move toward and clamps the rotating shaft, wherein the elastic piece assembly applies a first clamping force to the rotating shaft.

Abstract: Particular embodiments described herein provide for an electronic device, such as a notebook computer or laptop, which includes a circuit board coupled to a plurality of electronic components (which includes any type of components, elements, circuitry, etc.). One particular example implementation of the electronic device may include a low profile hinge design that includes a micro-hinge. The micro-hinge can couple a first element to a second element and can include a first attachment that couples to the first element, a second attachment that couples to the second element, and a plurality of linkages that couples the first attachment to the second attachment. The low profile hinge can further include a plurality of micro-hinges and a plurality of support rods.

Abstract: A multistage friction hinge is described. In at least some embodiments, the described hinge enables a support component to be adjustably attached to an apparatus. According to various embodiments, a hinge includes different activity stages where movement of the hinge is based on different activity mechanisms. For instance, the hinge includes different sets of components that form different friction engines that provide resistance to rotational and/or pivoting movement of the hinge.

Abstract: A latch mechanism includes a latch and a rotation shaft supporting part. The latch is rotatable around a rotation shaft between a housing position and a lock position, and fixes a first unit and a second unit in a closed state at the lock position. The rotation shaft supporting part rotatably supports the rotation shaft. The latch has a first ring-shaped part disposed coaxially with the rotation shaft. The rotation shaft supporting part has a second ring-shaped part disposed coaxially with the rotation shaft. Heights of the first ring-shaped part and the second ring-shaped part are set such that an area of abutment between the first ring-shaped part and the second ring-shaped part increases as the latch rotates from the lock position to the housing position.

Abstract: A riveting device for mutual assembly of two parts each including a bore, where the device includes a non-deformable external rivet having a tubular body suitable for being inserted into said bores and provided on one of the longitudinal ends thereof with a lip, and an internal rivet having a solid deformable cylindrical body and issuing substantially perpendicular from a flange, said tubular body having an external diameter slightly less than the diameter of said bores and a length D between the rear face of the lip thereof and the opposite end thereof at most equal to the sum of the thicknesses of the parts, said cylindrical body having an external homothetic transverse cross-section slightly less than the internal transverse cross-section of the tubular body, and a length slightly greater than that of the tubular body.

Abstract: A hinge assembly for an electronic device comprises a first gear rotatable about a first axis of the hinge assembly and a second gear, rotatable about a second axis of the hinge assembly. A hinge housing holds the first gear in engagement with the second gear. A first hinge mounting element is configured to be movably fixed to a first leaf of the electronic device and a second hinge mounting element is configured to be movably fixed to a second leaf of the electronic device. A first pair of levers connects the first gear and the first hinge mounting element; and a second pair of levers connects the second gear and the second hinge mounting element.

Abstract: A hinge assembly that includes a closure member such as a door and a torsion bar that extends between hinge assemblies about which the door pivots so that the torsion bar becomes twisted when the door is moved between a closed position and an open position. The twisting of the torsion bar creates potential energy in the torsion which can be used to open or close the door. A force adjustment mechanism is provided which releases built-up potential energy in the torsion bar in a controlled manner so as to close open the door in a controlled manner.

Abstract: An example device includes a first member, a second member, and a hinge. The hinge pivotably couples the first member to the second member. The hinge includes a damper. The damper includes core, and the core has a lobed portion. In another example, a device includes a first mounting member, a second mounting member, a first connector pivotably coupled to the first mounting member at a first hinge and to the second mounting member at a second hinge, a second connector pivotably coupled to the first mounting member at a third hinge and to the second mounting member at a fourth hinge, and a damper positioned at least at one of the first hinge, second hinge, third hinge or the fourth hinge, the damper including core with lobed portion.

Abstract: A torsion washer of the present disclosure includes a base portion and an elastic unit extended from the base portion. The elastic unit includes an external elastic arm and a torsion-adjusting arm arranged inside the external elastic arm. A space surrounded by the base portion and the external elastic arm is divided into a hole and a slot, in air communication with the hole, by using the torsion-adjusting arm. A distance, i.e., a radius, between the external elastic arm and a center of the hole is larger than a distance, i.e., an interference distance, between the torsion-adjusting arm and the center of the hole. Moreover, the present disclosure provides a torsion device including a plurality of the torsion washers and a shaft coupling through the holes of the torsion washers, and the shaft is configured to selectively contact each torsion-adjusting arm.

Abstract: A pivot device having asymmetric friction torque is provided. The pivot device includes a shaft extending along a longitudinal axis, a sleeve surrounding the shaft, the sleeve defining a gap extending longitudinally, the sleeve and the shaft being configured for rotation with respect to one another about the longitudinal axis, and a helical compression element surrounding the sleeve and exerting a compressive force onto the sleeve, wherein a first torque required to rotate the sleeve and the shaft with respect to one another in a first direction differs from a second torque required to rotate the sleeve and the shaft with respect to one another in a second direction opposite to the first direction. A method for providing a pivot device asymmetric friction torque is also provided.

Abstract: A torsion washer integrally formed as a one-piece structure includes an external ring-shaped portion, a first abutting arm and a second abutting arm both separately extending from an inner edge of the external ring-shaped portion, and a connecting lever connecting the first and second abutting arms. The inner edge includes a first arc segment and an opposite second arc segment, and centers of circle of the first and second arc segments are located in a space surrounded by the inner edge. Free ends of the first and second abutting arms do not contact the inner edge. A distance between a first abutting portion of the first abutting arm and the first center of circle is less than a radius of the first arc segment. The connecting lever is spaced apart from the inner edge, allowing the first and second abutting arms to be interlinked with each other.

Abstract: An adjustable table may comprise a base, an adjusting unit and a tabletop, and the adjusting unit further has a locating seat, a sliding seat, a spring, a first shaft, a connecting rod and an operating rod. The locating seat has a first top plate, and each of two lateral edges of the first top plate is vertically connected to a first side plate. The first shaft is configured to simultaneously couple with the two first side plates, which significantly improves the stableness of the adjustable table when the tabletop bearing weight.

Abstract: A drop-away arrow rest for an archery bow is provided that utilizes a torque transfer system to transfer a rotational motion from an actuation element to a launcher configured to support the shaft of an arrow when the launcher is in an up position. The rotational motion causes the launcher to rotate from an up position to a down position while the archery bow is shot. After the arrow has cleared the launcher, the arrow rest described herein is configured to automatically return to the up position.

Abstract: Provided is a torque hinge which can be easily assembled. A torque hinge includes a restricting member 3 having a hole 31, a shaft 4 passed through the hole 31 of the restricting member 3, a friction member 6 engaged with the shaft 4 in an interference fitting state so as to generate torque due to friction to the shaft 4 which relatively rotates and fitted in the hole 31 of the restricting member 6, and a fixing shaft 41 for unrotatably fixing the friction member 6 to the restricting member 3, the fixing shaft 41 intervening between the friction member 6 and the restricting member 3. The fixing shaft 41 presses a wedge-shaped rotation locking portion 44 of the friction member 6 onto an inner surface of the hole 31 of the restricting member 3.

Abstract: A portable electronic device including a main body, a camera module and a movement mechanism is provided. The main body has an accommodating groove located in the main body and exposed at a surface thereof. The camera module is disposed in the accommodating groove, and the camera module has a wide angle lens. The movement mechanism is located between the camera module and the accommodating groove, and the camera module is configured to move between a first position and a second position in the accommodating groove. When the camera module is located at the first position, an upper surface of the wide angle lens is lower than or equal to the surface of the main body. When the camera module is located at the second position, the wide angel lens is protruded out of the surface of the main body.

Abstract: Particular examples described herein provide for an electronic device, such as a notebook computer or laptop, which includes a circuit board coupled to a plurality of electronic components (which includes any type of hardware, elements, circuitry, etc.). The electronic device may also include a connector assembly that is positioned within at least a portion of a recess of the electronic device, where the connector assembly includes: a first assembly that is to receive a connector; and a second assembly that is to receive an identification module that is to provide an association between a user and the electronic device.

Abstract: Particular examples described herein provide for an electronic device, such as a notebook computer or laptop, which includes a circuit board coupled to a plurality of electronic components (which includes any type of hardware, elements, circuitry, etc.). The electronic device may also include a connector assembly that is positioned within at least a portion of a recess of the electronic device, where the connector assembly includes: a first assembly that is to receive a connector; and a second assembly that is to receive an identification module that is to provide an association between a user and the electronic device.

Abstract: An overturn prevention device for an apparatus including a main body horizontally installed, and a tiltable housing being tiltable relative to the main body by a first rotary shaft incorporated in the main body, the overturn prevention device includes: a second rotary shaft disposed in the main body and extending in a direction vertical to the main body; a rotational force transmission mechanism disposed between the first rotary shaft and the second rotary shaft and configured to rotate the second rotary shaft by transmitting rotation of the first rotary shaft to the second rotary shaft; and an overturn prevention member disposed on the second rotary shaft and configured to protrude from the main body in a tilting direction of the tiltable housing when the second rotary shaft rotates with a tilting operation of the tiltable housing.

Abstract: A door closer assembly includes a central shaft rotatingly mounted in an outer housing and which passes through at least one brake pad. One or more wedges are slidingly mounted on the central shaft by means of a fastener. The wedges, upon tightening of the fastener, wedge against an inclined surface, which forces the wedges downwards and applies a downwards force that causes a friction-enhanced surface to rub against the at least one brake pad.

Abstract: An apparatus can include a processor; an electronic component accessible by the processor; a first housing attached to a first axle that includes a first gear where the first housing includes the processor; a second housing attached to a second axle that includes a second gear where the second housing includes the electronic component accessible by the processor; and a hinge assembly that includes an intermediate axle that includes a first intermediate gear that meshes with the first gear, a second intermediate gear that meshes with the second gear, a first bridge component that securely positions the first axle parallel to the intermediate axle and a second bridge component that securely positions the second axle parallel to the intermediate axle.

Abstract: A clip for a vehicle door assembly includes a base, a plurality of fingers forming an expandable opening, and an arm extending from the base for locating the clip within the door assembly. Each of the fingers includes an inward projecting tab at least partially defining the expandable opening such that a tip of a pin contacts the inward projecting tabs during insertion of the pin causing the plurality of fingers to expand outward to an expanded position allowing the pin to enter the expandable opening until the inward projecting tabs align with a groove formed in the pin adjacent the tip wherein the inward projecting tabs enter the groove allowing the plurality of fingers to return to a natural position and secure the pin in position. Inner and outer members of the door assembly secure the clip therebetween for receiving pins associated with movement of the door.

Abstract: One aspect is a torque element retention system with a housing having an opening. A torque assembly has a shaft and a torque element stacked along the shaft and is configured substantially within the opening of the housing. The torque element has an arm portion and a foot portion and the opening has an arm opening section configured to receive the arm portion of the torque element and a foot retention section configured to receive the foot portion of the torque element. The torque element retention system has a system axis through the center of the shaft and extending through the foot retention section. The at least one of the first and second foot end portions of the foot retention section includes first and second non-parallel segments having no normal length to chord length ratio greater than 0.5.

Abstract: A spring for sun visors includes a torque application section that extends from a holding section and applies torque when a main section is rotating. The holding section has a flat section that receives torque from a shaft. The torque application section has a first spring piece extending from one end of the holding section and a second spring piece extending from the other end of the holding section and being bent so as to fold back. The first spring piece has a first tip section that includes overhanging sections that are narrower than the width of the holding section. The second spring piece has a second tip section that is arranged so as to overlap on the outside of the overhanging sections. The overhanging sections are provided in an area extending from the torque receiving section to the first tip section.

Abstract: A structure for a nacelle cover connection portion of a wind turbine generator includes a lengthy first angled member fixed to an inside surface of a nacelle cover and forming an upper end portion of a side wall panel; and a lengthy second angled member fixed to the inside surface and forming a lower end portion of a roof panel. An upper surface of the first angled member and a lower surface of the second angled member are aligned with and fixed to each other. A covering portion covering the upper end portion from the outside of a nacelle is provided at a predetermined interval from the same and integral with the lower end portion so as to protrude to the outside of the nacelle cover farther than the lower end portion. A packing is interposed between the upper and lower surfaces.

Abstract: In one embodiment, a clamshell-slate hybrid may act as either a clamshell or slate computing device. The clamshell-slate hybrid 202 may selectively set an activation state of a vestigial key set 426 of a keyboard 424 on a key side 422 of a keyboard chassis 206 hinged along a top axis to a display chassis 204. The clamshell-slate hybrid 202 may retract the vestigial key set 426 based on an activation state. The clamshell-slate hybrid 202 may receive a user input in a touch screen display 354 on a display side 352 of the display chassis 204.

Abstract: Implementations of the present disclosure disclose an adjustable display housing assembly. According to one implementation, the adjustable display housing assembly comprises a base housing and a display panel housing. Furthermore, a first hinge is attached to the base housing and a moveable arm extends from the first hinge at a first end to a second hinge at an end opposite the first end. In addition, a flexible mounting plate is included to attach the second hinge to the display housing. When the display housing is placed in a closed position, a pivot point associated with the second hinge is retracted by the flexible mounting plate. And when the display housing is placed in a first viewing position, the pivot point associated the second hinge extends away from the display housing.

Abstract: An apparatus can include a processor; memory accessible by the processor; a first housing that includes a front side and a back side and a thickness therebetween; a second housing that includes a front side and a back side and a thickness therebetween; a first gear operatively coupled to the first housing; and a second gear operatively coupled to the second housing where the first and second gears mesh to orient the first and second housings in a front side to front side orientation and in a back side to back side orientation.

Abstract: A mounting apparatus includes a cradle, a stand, a cradle attachment member, and a rotation member. The cradle includes an electronic display attachment member which is configured to removably attach an electronic display to the cradle. The cradle attachment member is configured to removably attach the cradle to the stand. The rotation member is configured to allow rotation of the electronic display when it is attached to the electronic display attachment member.

Abstract: A locking assembly is disclosed herein. An example includes a first cam lobe and a first cam lobe lock coupled to the first cam lobe. The example additionally includes a first cam lobe lock recess that receives the first cam lobe lock via movement of the first cam lobe to limit rotation of a panel of a computing device about a shaft.

Abstract: An information handling system converts from a closed position to a tablet position by rotating a lid with a display 360 degrees about a hinge having synchronized and continuous motion. The hinge has first and second axles held in a spaced and substantially parallel orientation by a support. A flexible compressive member translates motion of each axle to the other to provide fluid movement of the lid relative to the housing. For instance, ball bearings disposed in guide formed in the support translate rotational motion between a first and second axles.

Abstract: A hinge structure may comprise a first assembly including a central post with an outer surface and a first connector element on the central post for mounting on a first structure, a second assembly pivotally coupled to the first assembly and including a ring extending about the central post, a ring connector connected to the ring, and a second connector element on the ring for mounting on a second structure. A braking element may apply a selectable amount of resistance to pivot movement of the second connector element with respect to the first connector element and including a friction pad extending about a portion of the central post, a pressure band for pressing the friction pad against the central post, and a connecting structure connecting the ends of the band and being adjustable to move the ends closer toward each other and to relax the ends away from each other.