Abstract: A valve mechanism for controlling release of pressurized fluid includes a fluid chamber. A plunger is received in an aperture in the fluid chamber, and is movable between a fluid retention position in which fluid is substantially trapped in the fluid chamber and a fluid release position in which fluid can escape from the fluid chamber through passages in the plunger. The plunger is biased into the fluid retention position. A driver drives a plunger actuator, and the plunger actuator is guided into engagement with the plunger to cause the plunger and the plunger actuator to move in unison and move the plunger into the fluid release position during a first portion of a stroke of the driver towards the fluid chamber, and the plunger actuator is further guided to permit the plunger to return to the fluid retention position during a second portion of the stroke.

Abstract: The present invention relates to a tub for bathing infants or children. The tub includes a receptacle for containing water and for receiving an infant. The tub also includes a selectively removable insert or positioning member that can be used to change the bathing area inside of the tub. When the positioning member is locked to the tub, the positioning member defines two separate infant seating positions within the tub. The positioning member is removable from the tub to allow the entire receptacle to be used.

Abstract: A portable shower stall suitable for a wheelchair-bound person to bathe with the help of an assistant, comprising of a self-supporting flexible shower base, a modular shower enclosure standing freely within the shower base, a hand-held sprayer connected to a kitchen faucet via hose, and a pump with puddle scoop attachment that drains the shower base. One sidewall of the shower base can be pressed down and fastened to the shower base bottom to facilitate wheelchair access, but it can be released and restored to upright position for water retention. Shower enclosure consists of two identical bi-fold shower screens clamping to each other to form a splash-proof rectangle. However, one or both screens can be removed from the shower base to provide access to the wheelchair-bound person.

Abstract: A bathtub drainage and overflow system assembly is a combination of a one-piece overflow pipe and a waste water drain assembly connected by a T-shaped elbow. The one-piece overflow pipe has an inverted L-shape having an elbow portion. A lip extends radially outwardly from an outer surface of the overflow pipe to engage an outer surface of the bathtub end wall around the bathtub overflow port. A thin diaphragm is used to close the inlet to fluid flow. The waste water drain has an L-shaped drain pipe having an annular flange resting on a bottom wall of the bathtub.

Abstract: A medical assist device for a patient has a rotatable platform with a seat adjacent the platform and a lift mechanism for moving the seat from a lowered position for supporting a patient to a raised position and likewise able to move said seat from a raised position for supporting a patient to a lowered position. The rotatable platform can be rotated only if the seat is in the lowered position and the lift mechanism for raising the seat can be actuated only if the rotatable platform is in a predetermined position at which an open space between support bars is facing the seat.

Abstract: A patient transfer mattress is disclosed which includes a plurality of pods connecting the upper and lower sheets of the mattress. The pods may include a first aperture in a side wall thereof and a second aperture in an end thereof, said first and second apertures allowing air to flow from within a main cavity of the mattress and out to form a cushion of air beneath the mattress. One or more of the pods may also include a perforated disc positioned between the opposite ends thereby dividing the pod into upper and lower portions. The perforated disc controls air flow between the upper and lower portions to buffer local changes in air pressure caused by pump pressure, patient body weight or saturation.

Abstract: The luggage attachable cushion device sections are held together with pliable hinges at the folding lines for wrapping the device around average carry on luggage. Two full-length cloth straps tie sections together lengthwise and wrap around an existing luggage. The strap ends fasten together at the top of the luggage using hook and loop. When unfolded, the device makes a bed, a chair cushion, or can cushion other surfaces as desired. The mat is removably attached to the folding blanket that can be used to further cushion or to cover a user as decided. The device may be especially sized to fit around carry-on luggage so that a user can more conveniently travel.

Abstract: A bed covering made of a substantially rectangular fabric having a head end, a foot end and an unfolded width. A first series of fastening elements, proximate to the foot end, is arrayed on one side of a center line of the bed covering. A second series of fastening elements, proximate to the foot end and complementary to the first series, is arrayed on an opposing side of the center line. The first and second series of fastening devices allow the bed covering to be placed in a fastened configuration where the width of the foot end of the bed covering is less than the width of the head end of the bed covering.

Abstract: A swaddle garment to calm and comfort an infant has two panels and a leg pouch. One panel that is both wide and long enough to wrap entirely both of the infant's arms and a second panel to then wrap around the infant's torso and secured arms. The bottom portions of the back and front panels form a leg pouch to contain the infant's legs. Hook and loop fasteners are used to secure the arm restraints, and the bottom of the leg pouch has an opening for easy access for diaper changes.

Abstract: A negative pressure care bed, including at least a worktable, an armrest, a rocking bed having an upper bed surface and a lower bed surface, a mattress, a body including an upper part and a lower part, multiple excretion holes, a pair of trousers, a bed pan, a waste container having an inlet and an outlet, and a noise reduction oven. The upper part is connected to the lower part via a hinge. A first lifter is disposed on the upper part. A groove is disposed at the bottom of the negative pressure care bed and formed via the worktable and the armrest. The rocking bed is disposed on the groove via multiple bearing supports. The excretion holes are disposed on the mattress and on the lower bed surface of the rocking bed. The trousers are disposed on the excretion hole. The bed pan is disposed in the excretion hole and on the trousers.

Abstract: Today, electromechanical actuator systems are used in a variety of applications, of which some are more safety critical than others. Likewise, they are used in a wide range of applications where the safety of persons often to a higher or lesser extent depends on that the actuators remains safe both during normal use and in the fault conditions, which may occur. By an actuator comprising a DC motor (2) equipped with a worm drive and a spindle (4), the typical wearing components are the bearing, which carries the spindle (4), the spindle nut (5) and the worm wheel (9) in the worm drive. Common to the described defect situations is that they in the time leading up to the occurrence of the defect will show a decrease in the ratio of efficiency. Whether it is the spindle bearing, the worm drive, the spindle nut (5) or for that matter the motor, which is getting worn, the proportion between the current which the motor absorbs and the force the actuator performs will change.

Abstract: The present inventive subject matter is the method of use as well as a device or fixture for positioning and manipulating a patient's lower extremity for surgical and diagnostic procedures where alignment is critical and minute adjustments may be required. Once firmly attached to the operating table, the device prevents the patient's extremity from moving after the physician has selected the precise position for the elected procedure. This is achieved by a combination of a fracture reduction plate, posts, shimming blocks and an articulating and rotating frame or cradle with an adjustable and lockable rack and gear configuration and pivot joints attached to a foot assembly which acts as a leg and foot splint. The cradle is attached to the patient via a series of adjustable straps preventing the extremity from moving independently of the cradle.

Abstract: A furniture cushion comprises a matrix of interconnected pocketed springs, each spring of which is contained within a pocket of fabric, and a fiber pad overlying an upper surface of the matrix of pocketed springs, the fiber pad having a first layer in contact with the upper surface of the matrix of pocketed springs and a second layer in contact with the first layer, the first layer having a first density and said second layer having a second density, the first density being greater than the second density.

Abstract: A bedding article for reflux babies and/or other infants or children having a medical condition that requires an inclined sleeping position has anti-rotation features. These features include multiple securements or fasteners between a sling and a base or mattress. These features can include removable blocks (e.g. foam or the like) that are removably attachable to the sling on one or both sides.

Abstract: An attachment system and method for attaching a medical unit to a transport using connection brackets. The medical unit attaches to the connection brackets and restricts the movement of the medical unit during transportation. Use of the connection brackets enables quick and efficient attachment and removal of the medical unit from the transport. A connection bracket may be placed at one end of the transport and the medical unit may be attached to the connection bracket. Once the medical unit is placed on the transport, another connection bracket may be attached to the medical unit and connected to the transport. After the second connection bracket is connected, the medical unit can be transported to another location.

Abstract: The present invention relates to a washing machine and a method of controlling the washing machine. According to a washing machine and a method of controlling the washing machine in accordance with the present invention, a drum operates at a first speed so that part of the laundry tumbles within the drum and another part of the laundry adheres within the drum. The drum operates at a second speed lower than the first speed so that an amount of the tumbling laundry is more increased than at the first speed. Accordingly, at the time of a dehydration cycle, stability of the washing machine and laundry balancing can be ensured.

Abstract: A method of making a sole for an article of footwear is disclosed. The method includes steps of attaching a double sided acrylic adhesive film to a composite plate. The composite plate is then attached to an outer member of the article of footwear using the acrylic adhesive film.

Abstract: An article of footwear is disclosed that includes an upper and a sole structure secured to the upper. The sole structure incorporates a support element that includes a fluid-filled chamber, a first insert, and a second insert. The chamber defines a first surface, an opposite second surface, and a sidewall extending between the first surface and the second surface. The first insert is secured to the first surface and at least partially recessed into the polymer material of the chamber, and the second insert is secured to the second surface. In addition, the chamber may be pressurized to deform the first insert or the second insert.

Abstract: A ramp assembly for a vehicle generally includes a ramp platform having a top substantially planar tread surface and first and second ends, and an extension section movably coupled to the first end of the ramp platform at an interface, wherein the extension section is configured to move between a first extension section orientation and a second extension section orientation.

Abstract: A mobile boarding bridge (101) is equipped with climate control facilities. The mobile boarding bridge is furnished with multiple collapsible tunnels (110, 120). A heating/cooling device (160) comprising a climate controller (161) generates hot or cold air and is furnished on the outside of the first tunnel (110) of said tunnels. A connection pipe (163) that connects to ducts (164) within the tunnel is attached to said climate controller (161). A duct (164) connected to said connection pipe (163) directs air that has been heated/cooled by the heating-cooling device (160) to the interior of the first tunnel (110). An aspirator comprises an air intake (171) which intakes air from the interior of the tunnel and an intake pipe (172) which leads air taken in at said air intake (171) to the interior of the climate controller (161).

Abstract: A boarding bridge is provided that has an inexpensive, trouble-free, and strong construction, that eliminates the level differences between the passage portions of adjacent passage sections, and can reduce the occurrence of passengers falling and the like. In the boarding bridge (1), a proximal end tunnel (7) and a distal end tunnel (9) are telescopically fit, and are extended and retracted by moving relative to each other in a longitudinal direction.

Abstract: A toothbrush tip for a motorized toothbrush with a first brush head and a second brush head. The second brush head encircles the first brush head. The first and second brush heads has different axes of rotation. The first and second brush heads are driven by an elongated shaft. The shaft engages the second brush head. Interactive gear teeth associated with each first and second brush heads allows the first and second brush heads to rotate at opposite direction, upon being driven by the shaft.

Abstract: An electric toothbrush with improved brush head motion is provided. The electric toothbrush includes a head comprising a fixed base having a concave portion, and a brush head having a convex portion. The convex brush head nests within the concave base to allow for rotational and tilting movement of the brush head relative to the base. The brush head movement may be driven by a motor housed within the toothbrush.

Abstract: A floor cleaning machine is provided that includes a chassis that supports at least one cleaning element. The chassis is supported by a plurality of wheels, one which is steerable via a steering wheel that is interconnected to a housing also associated with the chassis. The chassis provided includes a plurality of movable housing members, one of which is associated with the steering wheel. To access the internal components of the floor cleaning machine, the front housing is rotated or moved away from the other housings wherein the steering wheel does not require disconnection to allow this movement.

Abstract: A wheel washer includes a frame. The wheel washer also includes a arm attachable to the frame, the arm being capable of movement with respect to the frame. The wheel washer further includes a brush attachable to the arm, the brush being capable of movement both in and out with respect to a surface of the frame and being capable of rotation in either a clockwise direction or a counterclockwise direction. The arm can be an articulated arm or a multi-axis arm.

Abstract: An apparatus and method for cleaning workpieces (5) using two pairs of substantially vertical rotating roller brushes (15) at each brush station whereby rotation of said brushes (15) propel workpieces (5) from one brush station to the next. Workpieces (5) are held for a predetermined period of time at each station by edgewheels (30, 31) which also rotate the workpieces (5). Cleaning fluid is sprayed onto workpieces (5) as they rotate to assist in removing particulate contamination. Method involves inserting a single workpiece (5) in between two pairs of rotating roller brushes (15) which scrub said workpiece as it is rotated by a pair of edgewheels (30, 31). There may be a divider shield (9) in between each brush station to prevent a large proportion of particulate matter and used cleaning fluid from traveling between the brush stations.

Abstract: A multi-layer surface treating pad is disclosed. It has an upper layer suitable to serve as one part of a hook/loop type fastener system, a bottom layer which comprises an abrasive or polishing material, and a cleaning or other surface treating formulation positioned between the upper and bottom layer in the form of a bump which is positioned mostly in a central region of the pad. The bump of the formulation causes the upper layer to bulge upwardly so as to provide a visual indication as to where one optimally should attach a motorized device thereto.

Abstract: Embodiments of the present invention are directed to devices and methods for cleaning, disinfecting, or sanitizing a toilet bowl surface or other surface. The device features a sheath having a first surface and second surface. The sheath is capable of assuming two positions. In said first position the first surface faces inward toward itself defining a first opening and a first chamber. In the second position the second surface faces inward towards itself defining a second opening and a second chamber and the first surface faces outward. The sheath is moved from the first position into the second position by inverting it over a flexible head attached to a hollow wand. A roughening agent is affixed to the first surface for cleaning toilet bowl surfaces and other surfaces. A cleaning, disinfecting or sanitizing agent can also be applied to the first surface of the sheath.

Abstract: A mop with a handle includes a plurality of mop fibers coupled to the handle. The mop includes a grip mounted on the handle, and a collar that is slidably positioned on the handle. The collar can be secured to the grip when not in use. The collar may include one or more tabs with a ramp for engagement with a ridge located on the grip that, in operation, allows for detachably coupling of the collar to the grip. The ramp is configured so that it extends a sufficient distance from the tab so as to cause the tab to flex when the collar is attached to the grip. In operation, a user can uncouple the collar from the grip and slide the collar over the mop fibers and use the collar to wring the mop fibers.

Abstract: A hair brush includes a brush head and a bristle/handle assembly. The head includes a cylindrical barrel with a plurality of apertures in it, and the bristle/handle assembly includes a handle and a bristle tree assembly. The bristle tree assembly includes a central bristle rod, a plurality of bristles radially extending from the rod, and a connecting rod extending between the bristle rod and the handle. The bristle rod is positioned within the barrel, and the bristles extend through the barrel apertures in an extended position. The brush head and the bristle/handle assembly are not attached to each other, and instead they slide longitudinally relative to each other. When the handle and the barrel are slid apart from each other, the bristle rod travels with the handle to retract the bristles to a retracted positioned further within the barrel.

Abstract: A paint roller including a roller cover retainer that is releasable to permit a roller cover to be easily removed. The device includes a locking lever pivotable relative to the frame which actuates retainers located within the roller assembly. The locking lever also exerts an axial force adapted to disengage the roller cover from the roller assembly when the retainer is disengaged. A used roller cover can be removed without the need to grasp the used roller cover. Installation of a roller cover onto the roller assembly automatically engages the retainers and shifts the locking lever into the locked position.

Abstract: A vacuum cleaner attachment and a method of control of the vacuum cleaner attachment are described. The vacuum cleaner attachment comprises an ultraviolet light source to irradiate and disinfect various cleaning surfaces. Various embodiments of the attachment include one or more safety features concerning activation, enabling, and disabling of the ultraviolet light source based on various parameters such as distance between the attachment and a cleaning surface, time that such a distance is greater than a predetermined time period, and temperature of the ultraviolet light source in order to enable safe and effective operation of the attachment.

Abstract: A vacuum cleaning system which has particular application to the oil-field industry. The system includes a vacuum unit for suctioning material from a surface to recycle, reclaim or cleanup said material. The system also includes a collection and discharge unit operable to automatically discharge, into an open atmosphere, an amount of the suctioned material collected while suctioning continues by the vacuum unit. The automatic discharging cycle of the collection and discharge unit allows drilling fluid to be rapidly vacuumed up and discharged to minimize settlement of debris in the collected material.

Abstract: A hand-held cleaning appliance includes a suction conduit having a longitudinal axis, an airflow generator generating an airflow along the suction conduit, a separating apparatus arranged in communication with the suction conduit for separating dirt and dust from the airflow, a power source supplying power to the airflow generator and an elongate handle disposed between the airflow generator and the power source. The elongate handle is dimensioned and arranged to be gripped by a user's hand and the elongate handle lies transverse to the longitudinal axis of the suction conduit. By providing a hand-held vacuum cleaner with such an arrangement, the hand-held vacuum cleaner is easier and more comfortable to manipulate in use.

Abstract: A vacuum cleaner having a base with an inlet facing a surface, a handle connected to the base, an air passage connecting the base inlet to the handle, and a removable handheld unit. The handheld has an inlet nozzle, a dirt separator, a vacuum fan to generate a working airflow into the inlet nozzle and through the dirt separator, and a housing joining the handheld, the dirt separator and the vacuum fan. The vacuum has a docking latch with a first latch position in which the latch holds the handheld in an operating position on the handle, and a second position in which the latch permits removal of the handheld from the operating position. The vacuum also has a safety catch with a catch member on the handle and a second member on the handheld. The catch members resiliently hold the handheld unit on the handle in a partially-removed position.

Abstract: A dust separator for a vacuum cleaner including a body having a pair of spaced apart ends, a first air inlet formed in the body and being configured to receive an air flow containing dust, and a dust outlet formed inwardly of the spaced apart ends and apart from the first air inlet to discharge dust separated in the body, is provided. In addition, a cross-sectional area of the body at the dust outlet is greater than a cross-sectional area of the body at the first air inlet.

Abstract: A cyclone separation dust cup, which includes a cup body and a cyclone tube, the cyclone tube being provided with an air inlet, an ash ejection outlet, and an air exhaust outlet; and the ash ejection outlet communicates with a dust storage cavity in the cup body, the air exhaust outlet with an air outlet positioned on the cup body through an air exhaust pipe, and the dust storage cavity with the air exhaust pipe. The dust storage cavity, by communicating with the air exhaust pipe, enables part of the air current entering the cyclone tube to enter the dust storage cavity in the cup body, thus producing suction in the ash ejection outlet of the cyclone tube that can draw the dust into the dust storage cavity. This enables the impurities with a lighter weight (e.g. hair and downy floc), which cannot fall into the dust storage cavity under gravity, to be inhaled into the dust storage cavity successfully, thus greatly improving the separating and filtering effect of this cyclone separation dust cup.

Abstract: The invention relates to a dirt-collecting device for a floor-cleaning machine, for picking up a liquid from a floor surface which is to be cleaned, having a carrier and at least one wiping member for wiping the floor surface, the carrier and the at least one wiping member bounding a suction channel which opens out into a suction mouth and of which the free cross-sectional area, through which a suction stream can pass, decreases, at least in one channel portion, in a direction away from the suction mouth. In order to produce such a dirt-collecting device in a more cost-effective manner, it is proposed according to the invention that the suction channel has disposed in it at least one channel-narrowing member, which is produced separately from the carrier. The invention also relates to a floor-cleaning machine having such a dirt-collecting device.

Abstract: A hexagonal wrench has a head. The head has an end surface, six equal side surfaces and at least one groove. Each side surface has a left edge segment and a right edge segment adjacent to the left edge segment of an adjacent side surface. The at least one groove is formed in at least one of the right edge segments and the left edge segments and extends to the end surface. Therefore, the head can engage securely an inner surface of a socket to rotate the socket even when the socket is worn or rounded.

Abstract: Method and apparatus for a quick-change caster system for removing and replacing the casters which are used to support articles such as steel racks, containers, crates and the like. The caster system having a housing which is attached to the article so that a caster mounted on a plate can be slidably inserted and removed from the housing in a very quick and easy fashion. Also disclosed is a dampening pad disposed between the caster plate and the housing which is designed to decrease noise, vibration, etc. Also shown is a bolt or the like used for locking the caster plate and dampening plate inside the housing so that it cannot be accidentally removed therefrom.

Abstract: A double-pedal double-wheel truckle with independent braking and releasing functions is a truckle for a precision instrument and comprises a body, a rotating & locking device, a truckle body device, a braking device and a bottom cover body. The body is provided for disposing a rotating & locking device, a truckle body device, a braking device and a bottom cover body. With the independent braking and releasing functions of the braking device of the body, the user can easily operate and stably block the rotating & locking device and the truckle body device. The bottom cover body is provided for preventing foreign matters from entering the truckle body device, so that the truckle can be locked from rotation. By such arrangements, it can achieve the objectives, such as easy operation, easy to distinguish braking state, stable braking, reducing noises, strengthening structure and safe usage, etc.

Abstract: A method and apparatus for reducing the torque of a compound balance in order to substantially cancel out the torsional force of the torsion spring acting on the spiral rod by creating an equal and opposing torsional force on the extension spring. The apparatus is an assembly connector that is non-permanently engaged with the extension spring, with the spiral rod being tensioned by the torsional force of the torsion spring. Alternatively, the extension spring may be turned in a direction to apply more torque than is required for operation of the compound balance. It is then engaged with a non pre-tensioned spiral rod sub-assembly to transfer the excess torque to the torsion spring of the spiral rod sub-assembly. In this manner, the opposing torsional forces of the torsion spring and the extension spring acting on the spiral rod substantially cancel out each other.

Abstract: A spring hinge for spectacles includes a housing, a hinge element, at least one spring element, and a blocking body. The housing has a recess which at least partially accommodates the hinge element, the at least one spring element, and the blocking body. The spring element and the blocking body are coupled directly to one another. At least one spring element subjects the blocking body to a prestress force on account of which the blocking body can be displaced out of an unlocking position into a locking position in which it interacts with a locking surface.

Abstract: A hinge assembly has a pintle, a stationary leaf, a rotating leaf, a rotating pressing disk, a stationary pressing disk, a biasing assembly and a fastener. The rotating pressing disk is mounted rotatably around the pintle, is attached non-rotatably to the rotating leaf and has a track face, an inner track and an outer track. The stationary pressing disk is mounted securely around the pintle and has a protrusion face, an inner protrusion and an outer protrusion. The inner and outer protrusions respectively contact slidably with the inner and outer track on the rotating pressing disk. With the arrangement of the inner and outer tracks on the rotating pressing disk and the inner and outer protrusions on the stationary pressing disk, the resistance provided by the hinge assembly is variable.

Abstract: A hinge comprises a rotatable bracket, a fixed bracket, a torsion spring, a locknut element and a shaft penetrating through the rotatable bracket, the fixed bracket, the spring and the locknut element. The rotatable bracket forms a through hole therein. The hinge further comprises an elastic hook and a driving element. The elastic hook is inserted into the through hole of the rotatable bracket to lock the electronic device when the electronic device is closed. A driving element mounted in the main body receives an operation of the user to push the elastic hook out of the through hole in order to open the electronic device.

Abstract: A hinge device of a plane monitor is capable of manually rotating a plane display in lateral horizontal direction, manually inclining (tilting, laying) in longitudinal direction, or manually adjusting the height in vertical direction, being simple in structure and easy in manual operation. The structure includes a mechanism for supporting a plane display in lower part, and rotating it manually in lateral horizontal direction, in which the rotary mechanism in the lateral horizontal direction includes horizontal rotary position holding means, and transmitting means for transmitting rotary motion in lateral horizontal direction of the plane display to the horizontal rotary position holding means.

Abstract: A rectangular partial door cover, specifically design to cover the doorknob, surface locks, deadbolt locks, and chain locks of an entrance door to an apartment or house. The base of the rectangular device is attached to the entrance door with a set of screws. The device has four sides, and a sliding door with a knob. The door slides open when the knob is pulled back, and it closes when the knob is pushed forward.

Abstract: Teeth 31 and 32 are formed on opposite sides of a strip portion 2 of a band 1 in the width direction. Protruding portions 51-54 are formed in a proximal portion 20 of the strip portion 2 so as to respectively engage the teeth 31 and 32 on the opposite sides of the strip portion 2 in the width direction. A release portion is provided between the protruding portions 51-54 for allowing a portion of the distal portion 22 and the intermediate portion 21 of the strip portion 2 where the teeth 31 and 32 are formed to be moved into and out of a space between the protruding portions 51-54.

Abstract: A wire gripper for positively locking a wire in place between an overhead support and a suspended load such that it can support the suspended load and maintain tension on the wire. The wire gripper includes an elongated body with a through bore and a threaded bore intersecting the through bore. Two open channels extend through the body parallel with and on either side of the threaded bore. A threaded fastener extends into the threaded bore. A U-shaped clip member with two legs is carried by the threaded fastener. By passing one or more wires through the through bore and tightening the fastener, six points of contact can be brought to bear against the inserted wires and thereby lock the wires with respect to the wire gripper.

Abstract: A resilient rotation buckle includes a decoration plate and the belt coupling structure having an end coupled to a belt. The decoration plate and the belt coupling structure form a rotation shaft and a rotation assembly that cooperate each other. The rotation assembly includes a receptacle compartment having a wall forming a through hole for receiving the rotation shaft therethrough, springs, and retention blocks. An accommodation channel is defined in the receptacle compartment in a direction normal to the through hole. When the rotation shaft is inserted, the retention blocks are in contact engagement with an outer circumference of the rotation shaft. The springs have first ends in biasing engagement with the retention blocks and second ends supported by walls of the accommodation channel. The rotation shaft and the rotation assembly allow for relative rotation therebetween for switching between a locked position and a released position.