Abstract: A protrusion is formed on a facing surface which is integral with a shaft of a hinge mechanism. The protrusion has a tip that is in contact with an end surface of the engagement portion when the first member and the second member swing relative to each other, so that displacement of the second member along the lengthwise direction of the shaft is restricted. A state immediately after the engagement portion is engaged with the shaft is referred to as an initial engagement state. In the initial engagement state, the protrusion is situated at a position beyond a center of the shaft when viewed in a direction of engaging the engagement portion with the shaft, and the end surface of the engagement portion is separated from the tip of the protrusion.

Abstract: This disclosure provides a fan, including a first case, a second case, and a reset mechanism. The first case includes a first side wall, where the first side wall has a first guide portion. The second case includes a second side wall, where the second side wall has a second guide portion. The first guide portion and the second guide portion are slidably joined and are configured to enable the first case and the second case to move toward or away from each other. The reset mechanism is connected to the first case and is configured to push the second case to move away from the first case.

Abstract: A storage device for a vehicle includes a storage portion main body capable of storing things therein, a lid swingably supported by the storage portion main body via a shaft member, a biasing member for biasing the lid in an opening direction, a first damper capable of damping a biasing force of the biasing member to a first transmission member, and a second damper capable of damping the biasing force of the biasing member to the second transmission member. The biasing force of the biasing member is set to a force that allows the lid to swing in the opening direction from a fully closed position to a predetermined open position, and stops a swinging motion of the lid when the lid is in the predetermined open position.

Abstract: A device for opening and closing container lids is configured for controlling the movement of a lid during the opening and closing of the lid. The device includes a fixed plate, which is connected to the container, a spring, which generates a force on the lid, the magnitude of which varies according to the relative position of the lid, and a common rotary shaft that hinges the lid to the fixed plate. The lid receives force of the spring at a point that is remote from the common rotary shaft such that the force exerted by the spring compensates for the weight of the lid.

Abstract: A drink bottle may include a container, a lid connected to the container and including a lid housing, a spout coupled to the lid housing, and an actuator assembly movably connected to the lid housing. The spout is movable between a stowed configuration and a dispensing configuration, the spout defining a passageway in fluid communication with an interior of the container when disposed in the dispensing configuration. The actuator assembly is operatively coupled to the spout when the spout is disposed in the stowed configuration to retain the spout in the stowed configuration, and the spout moves from the stowed configuration to the dispensing configuration responsive to actuation of the actuator assembly.

Abstract: A container for a fish hook and a fish bait consisting of two halves. The two halves are hinged together on one side of the container. The container has two finger grip portions extending there from at the same side. The hinge is made of spring leaves that are connected together by a hinge pin. The hinge pin is surrounded by a coil spring. The ends of the coil spring abut against an underside of the finger grip portions and the spring is so biased that a pressure is exerted against the finger grip portions to thereby keep the two halves of the container in a closed position. It takes two fingers of one hand to open the container. The container has a hook on one end to be hooked to a fishing reel on a fishing rod. A line end of the fishing line is contained within the container and has a hook and a bait attached thereto.

Abstract: A convenient cover opening and closing method, system, and apparatus are described. A cover grasper, adjustable tension, an anchor, and a stabilizer provide the necessary torques so that a cover opens and closes in a controlled smooth manner. Moreover, the apparatus and system may be conveniently removed from and secured to the cover's container, may be secured in a more permanent fashion to the container, or components of it may be secured on the container while others are not.

Abstract: An interlock vessel having an air-tight body with opposing ends. A portion of the body is designed to fit into a decompression (hyperbaric) chamber, wherein a diver or a patient undergoing a decompression treatment is positioned. The opposing ends are closed by pivotally moveable doors and locking assemblies that retain the doors in a closed position until the pressure inside the decompression chamber and the exterior of the chamber can be equalized. The outer door has two locking systems: (a) an interlock system and (b) a safety/delay locking system. Both locking assemblies are manually operated.

Abstract: A spring mechanism comprising a spring element having a pair of arms separated by a gap, a tapered flexible tongue with an enlarged tip, and a tapered slot extending longitudinally through the tongue, wherein the tapered flexible tongue is operatively arranged to bend such that the tip enters the gap and engages the pair of arms. A case for a canister capable of dispelling material is also disclosed using the spring mechanism to bias a lid in a closed position.

Abstract: The invention relates to a device including a hinged cover, which is pivotable about an axis of rotation out of a closed final position into an open final position, and a flexible element, which acts on the hinged cover with a force along a spring line of action. The flexible element is axially loaded in at least one final position of the cover and is loaded with transverse forces in bending or extension in at least one further position. In the open position of the cover, the spring line of action approaches the axis of rotation of the cover or lies substantially on the axis of rotation of the hinged cover, the spring line of action coincides with the axis of rotation of the cover such that the cover can be fixed in the open final position.

Abstract: A receptacle includes a container having a bottom wall and a side wall extending from the bottom wall. The side wall defines an opening and is comprised of a front wall portion and a back wall portion. A lid is secured to the container along the back wall portion at a spring hinge where the lid covers the opening. The front wall portion diverges as it extends away from the base at a first angle and the back wall portion diverges as it extends away from the base at a second angle where the first angle is greater than the second angle. The spring hinge defines an axis of rotation of the lid where the axis of rotation of the lid is outside of the rim of the opening. The lid is shaped and dimensioned such that the lid contacts the rim for substantially the entire periphery thereof.

Abstract: A cosmetic compact having an expansive base member containing a series of upwardly-facing product wells to accommodate one or more cosmetic items, the compact further having a cover member, and having a shuttle piece interposed between the base member and cover member. The various parts have cooperating slide components for permitting relative movement of the members in four opposed directions. A versatile, four way slide compact construction is thus made possible.

Abstract: A cover apparatus for an electronic device is provided. The cover apparatus includes a cover configured to be pivotably coupled to a body of the electronic device to open or close a portion of the body, and an elastic member, one end of which is supported by the cover, and the other end of which is supported by the body. The elastic member provides a driving force to pivot the cover in a direction for opening the portion of the body, and the cover includes a seating portion configured to fix the one end of the elastic member.

Abstract: A thermotherapy device (1) includes a basic housing (2) with walls (14) with a support for a patient and an especially transparent covering hood (3) for the basic housing (2), which covering hood can be moved between a closed position and an open position, so that the basic housing (2) is closed by the covering hood (3) in the closed position. A guide mechanism (4) is provided for mechanically guiding the motion of the covering hood (3) between the closed position and open position. A heater such as a convection heater with a blower heats the air and/or an air humidifier humidifies the air. The covering hood (3) is moved in a simple manner and access to the support for a patient is essentially not hindered by the covering hood (3) in the open position.

Abstract: A cosmetic container which is capable of stabilizing an action of a hinge portion is provided with a single pivot shaft member having biasing means, and improving opening and closing functions of a lid body. Included are: a container main body configured to contain a cosmetic; a lid body turnably provided to the container main body and capable of opening and closing the container main body; and a first pivot support member and a second pivot support mechanism disposed on a pivot axis about which the lid body turns, and causing the container main body to turnably support the lid body. The first pivot support member includes: a compression coil spring located between the container main body and the lid body and configured to generate resilience when compressed in a direction along the pivot axis; and a lock member and a pivot member configured to compress the compression coil spring in the direction along the pivot axis and to release the compression by turning of the lid body.

Abstract: An electronic cigarette case includes a box body, a box cover hinged to the box body and an opening and closing mechanism. The opening and closing mechanism includes a spring piece built in the box body and an arc-shaped bulge formed on the box cover. The arc-shaped bulge clamped between the spring piece and inner wall of the box body and slidingly contact with the spring piece. When the box cover rotates a first predetermined angle relative to the box body, the spring piece drives the bulge to slide relative to the spring piece until the box cover is fully open. When the box cover rotates a second predetermined angle relative to the box body, the spring piece drives the arc-shaped bulge to slide relative to the spring piece until the box cover is fully closed. Thus, it is convenient to open or close the electronic cigarette case which has a simplified structure.

Abstract: A case for a cosmetic or body hygiene product comprises a body having a bottom and a free edge 2B and containing a dish 5 containing a solid, pasty or pulverulent product, and a lid 3 mounted pivotably on the body.

Abstract: A package comprises a latch including first and second legs and an actuating portion. The first and second legs are joined at an angle. The actuator portion of the first leg is positioned to be displaced generally laterally to displace the second leg generally longitudinally to release the latch. In another embodiment the package has base wells on the inside surface. A generally flat marginal sealing surface encircles the first and second base wells. The wells of the base and/or lid are covered with a cover sheet to close them. Still another embodiment is a child-resistant container comprising a shell, two drawers, a stop, and a latch. The drawers are prevented from sliding apart past a limit of travel when one drawer is open sufficiently to provide access to its contents and the other drawer is not.

Abstract: When a lid body (36) is opened, a side wall member (22) projects from an upper end face of a circumferential wall of a main body (12), and outside a cup portion (20), a wall portion (24) of the side wall member (22) rises. Specifically, a height of the wall portion (24) capable of supporting a side portion of a container (16) rises. Therefore, for a portion wherein the side wall member (22) rises, a depth of a supporting portion capable of supporting the container (16) is deepened.

Abstract: In a closure for closing the orifice (13) of a neck (12), in particular the orifice of a fuel filler neck for automotive vehicles, a spring mechanism is provided which takes the form of a tightening device for drawing the closure part (14) automatically into its final closed position. The movement of the closure part (14) is controlled by a first guide slot (19). The operating lever (35), by means of which the closure part is moved, is furthermore hinged to the closure part (14) by means of a second guide slot (39), which, when an opening force is introduced via the closure part (14), blocks the movement of the closure part (14) from its closed position in the opening direction so that the closure part (14) cannot be manually opened from outside.

Abstract: A console box includes a housing defining an article accommodating space therein and having an opening formed at a front side thereof; a cover coupled to the front side of the housing via hinge couplers disposed at opposite sides of the cover; dampers, each being disposed between each of the hinge couplers of the cover and the housing and controlling an opening speed of the cover; and a torsion spring disposed between each of the hinge couplers of the cover and the housing and elastically supporting the cover. The console box further includes a hinge cover disposed outside each of the hinge couplers of the cover and preventing the cover and the torsion spring from separating from each other.

Abstract: A hinge on a cover for a container, has a pivot axis and includes at least one first member fixed against rotation and at least one second member rotatable about the axis, which first and second members are arranged coaxially along the axis. A third member is arranged coaxial with the first and second members. A damper element is provided between the first and the third members in order to dampen the relative rate of rotation between the members. A first spring is arranged between the second and the third tubular members, which first spring is connected to the respective second and third members so that relative rotation between the tubular members is permitted in a first direction, when the cover is pivoted towards a first position, and prevented in a second direction, when the cover is pivoted towards a second position. A container provided with such a hinge is described.

Abstract: A container that retains a razor blade cartridge within the container with a handle attached to the razor blade cartridge with the handle partially within the container and partially extending out of the container. The container is a spring biased container to keep it closed and it is necessary to provide a force that overcomes the spring force and open the container so that the handle and attached razor blade cartridge can be removed from the container which then snaps shut due to the closing spring force, the safety razor with razor blade cartridge and handle are ready for immediate use. Antiseptic and/or desiccant can be retained in the container.

Abstract: A washing machine comprising a cabinet open at an upper portion, a top cover coupled to the upper portion of the cabinet and including an opening for loading and unloading laundry therethrough, a lid assembly rotatably coupled to the top cover to open and close the opening, and a first hinge unit connecting the lid assembly with the top cover and reducing a speed of closing the lid assembly is provided. In the washing machine, the closing speed of the lid assembly is reduced to mitigate shock between the lid assembly and the top cover.

Abstract: A container that retains a razor blade cartridge within the container with a handle attached to the razor blade cartridge with the handle partially within the container and partially extending out of the container. The container is a spring biased container to keep it closed and it is necessary to provide a force that overcomes the spring force and open the container so that the handle and attached razor blade cartridge can be removed from the container which then snaps shut due to the closing spring force, the safety razor with razor blade cartridge and handle are ready for immediate use.

Abstract: An electronic apparatus excellent in workability in mounting a lid to an apparatus housing. The electronic apparatus comprises a housing having a pair of bearing portions, and a battery lid unit having a pair of shafts for being rotatably fitted in the bearing portions, respectively. A movable shaft of the shafts is axially retractable, and the battery lid unit is openable and closable with respect to the housing about the shafts. An urging spring has a contact portion for contact with the housing, and urges the battery lid unit in an opening direction with respect to the housing. The contact portion is moved according to retraction of the movable shaft such that an urging range through which the urging member urges the lid in the opening direction becomes smaller than a range of the pivotal motion of the lid with respect to the housing.

Abstract: A device for flexibly retaining lids or tops to containers or receptacles. Flexible coil chord secures a container or receptacle to its lid or top. The device allows for flexibly securing a lid to its container or receptacle to reduce loss or damage that could be avoided by retaining them in proximity to each other.

Abstract: The moving mechanism has a first stationary-side gear part and a second stationary-side gear part provided on a support body side; a movable-side gear part and a pinion gear provided on a supported part of a movable body; and a guide device positioned so that the movable-side gear part engages with the first stationary-side gear part and the pinion gear engages with the second stationary-side gear part. The first stationary-side gear part is formed along an arc of a virtual circle, and has teeth oriented toward a center side of this virtual circle; the second stationary-side gear part is provided adjacent to this first stationary-side gear part on the center side of the aforementioned virtual circle, is formed along an arc of a separate virtual circle from this virtual circle, and has teeth oriented toward a center side of this separate virtual circle.

Abstract: A package comprises a latch including first and second legs and an actuating portion. The first and second legs are joined at an angle. The actuator portion of the first leg is positioned to be displaced generally laterally to displace the second leg generally longitudinally to release the latch. In another embodiment the package has base wells on the inside surface. A generally flat marginal sealing surface encircles the first and second base wells. The wells of the base and/or lid are covered with a cover sheet to close them. Still another embodiment is a child-resistant container comprising a shell, two drawers, a stop, and a latch. The drawers are prevented from sliding apart past a limit of travel when one drawer is open sufficiently to provide access to its contents and the other drawer is not.

Abstract: A hinged container is disclosed, including a base, a lid, and a hinge joining the base and lid, allowing the lid to pivot open or closed relative to the base. One of the base and the lid has a circular, outwardly tapered outer seal member disposed at least partially within its outer perimeter. The other of the base and the lid has a circular, inwardly-tapered inner seal member disposed at least partially within its outer perimeter. The inner and outer seal members are positioned to engage concentrically to wedge the inwardly and outwardly tapered surfaces together and form a seal when the base and the lid are closed, and to disengage concentrically to part the inwardly and outwardly tapered surfaces when the base and the lid are opened.

Abstract: In one example, a bistable cover assembly includes a cover, a base, an intermediate part; and pre-tensioned spring, the spring being attached to the base and the intermediate part such that the spring biases the intermediate part into two stable positions, the cover interfacing with the intermediate part and being closed in a first of the two stable positions and open in a second of the two stable positions. A method for assembling a cover assembly is also described.

Abstract: The packaging includes a container provided with an opening at the top and bounding a housing designed to receive the product, a lid designed to close the opening of the container and a deformable membrane borne by the lid to ensure the leak-tightness of the housing when the lid is in a closed position. The deformable membrane includes a generally flexible central wall surrounded by a generally rigid annular rim which is urged in the axial direction of closure by spring element bearing on a base of the lid such that the annular rim bears in a leak-tight manner on an annular bearing surrounding the opening of the container when the lid is in the closed position and the central wall may be deformed as a result of the differences in pressure prevailing on either side of the deformable membrane. The packaging may be used in particular for cosmetic preparations.

Abstract: A universal box lid lifter has an upper mounting plate, an upper connection piece, a pivoting arm, a spring housing, a spring assembly, a lower connection piece and a lower mounting plate. The upper connection piece has two ends oriented in two directions and is pivotally mounted between the upper mounting plate, with the pivoting arm respectively pivotable in two directions. The spring assembly is mounted in the spring housing and abuts against the pivoting arm and alternately positions the pivoting arm. The lower connection piece has two ends oriented in two directions and is pivotally mounted between the lower mounting plate, with the spring housing respectively pivotable in two directions. Given the bidirectionally pivotable mechanism at both ends of the universal box lid lifter, the universal box lid lifters of a single type can be flexibly mounted to a box as requested to lift the lid of the box.

Abstract: An explosion-proof housing includes at least one lower housing part which is provided with a housing wall defining a housing opening that can be closed by an articulated cover. The articulated cover is mounted by an articulation device to be pivotable between an opened and a closed position. In order to allow both a closely adjacent arrangement of housings and the complete utilization of the housing interior, the articulation device includes a lower articulation part arranged in the housing wall, and an upper articulation part arranged on a lower side of the articulated cover which faces the housing opening in a closed position. The lower articulation part and the upper articulation part are pivotably interconnected.

Abstract: A quick open structure for a tool box contains a body including an upper housing, a lower housing, two retaining portions, and two bearing portions; the lower and the lower housings including a first and a second chambers individually, and the first chamber including two grooves respectively and a limiting element extending therefrom, each groove including an opening, the second chamber including a receiving member; wherein the first chamber is provided to receive a locking device and includes a pressing member and an engaging member, the pressing member includes a larger-area press portion and two side straps in response to the grooves, each side strap includes a hole to receive a returning spring, and a first and a second axial rotating portions include a first orifice and a second orifice to insert two shafts respectively, each shaft includes a resilient element, the engaging member includes a fastening block.

Abstract: A cover device for a trash bin includes a base member, which has a first end and a second end. A compartment is formed at the first end and an opening is defined between the first and second ends of the base member through which trash can be thrown into the trash bin. A cover member includes a cover portion and a connected element. At least one elastic device includes an elastic element having a first end provided at the compartment and a second end coupled to the connected element. The cover member can be rotated between a first position and a second position. While in the second position of the cover member, the elastic element is released to lift the cover member upward, with the cover portion being completely exposed from the base member outward.

Abstract: A container assembly for a motor vehicle passenger compartment includes a housing, a door, an arm, a helical spring and a cam. The door is pivotally coupled to the housing for movement about a first pivot between a closed position wherein the door covers an opening in the housing and an open position wherein the door is pivoted about the first pivot to allow access through the opening to a storage space in the housing. The arm is pivotally coupled to the housing for movement about a second pivot. The arm has a cam surface. The helical spring continuously biases the arm toward the first pivot. The cam is coupled to the door and movable with the door about the first pivot between the closed position and the open position. The cam has a center portion and a lobe extending outwardly from the center portion. The lobe remains in contact with the cam surface of the arm.

Abstract: A hinged container is disclosed, including a base, a lid, and a hinge joining the base and lid, allowing the lid to pivot open or closed relative to the base. One of the base and the lid has a circular, outwardly tapered outer seal member disposed at least partially within its outer perimeter. The other of the base and the lid has a circular, inwardly-tapered inner seal member disposed at least partially within its outer perimeter. The inner and outer seal members are positioned to engage concentrically to wedge the inwardly and outwardly tapered surfaces together and form a seal when the base and the lid are closed, and to disengage concentrically to part the inwardly and outwardly tapered surfaces when the base and the lid are opened.

Abstract: A cover assembly for a trash bin includes a cover, a support ring, a pivoting device coupling to the cover and the support ring and a buffer device connecting to the pivoting device. The pivoting device provides an upward force to the cover, and the buffer device cushions the upward force from the pivoting device. The buffer device and the pivoting device allow the cover assembly to be lifted slowly and prevent a loud noise while lifting the cover quickly and while the cover bumps the trash bin.

Abstract: A cover means for a trash bin, the cover means comprises a base member, which has a first end and a second end, including a compartment formed at the first end thereof and an opening defined between the first and second ends thereof, thereby to throw trash into the trash bin from the opening; a cover member including a cover portion and a connected element; at least one elastic means, each elastic means including an elastic element having a first end provided at the compartment and a second end coupled to the connected element; wherein the cover member can be rotated between a first position and a second position; while in the second position of the cover member, the elastic element is released to lift the cover member upward, with the cover portion being completely exposed from the base member outward.

Abstract: In a case having a cover and a case body connected to each other via a shaft and a shaft inserting portion, a quantity of gel to be used can be reduced while a braking effect of the cover is satisfactorily secured. A shaft is inserted into a shaft inserting portion such that a cover is turned with respect to a case body on the shaft to be opened. An urging mechanism urges the cover in an opening direction. A viscous material is disposed between the shaft and the shaft inserting portion such that the cover is slowly opened with respect to the case body. An engaging projection is disposed at the shaft inserting portion while an engaged recess engageable with the engaging projection is disposed the shaft to enlarge a contact area between the shaft and the shaft inserting portion via the viscous material.

Abstract: An outdoor cooking cooker having a lid biased towards an open position by a torsional spring and able to remain partially open at a plurality of partially open positions by increased friction against the lid along a pivot. The outdoor cooking cooker may also include a vertical lifting device for lifting a single rack or multiple racks out from the outdoor cooking cooker and a device for coupling the racks together. The outdoor cooking device can include a firebox that is double-walled and may be mounted upon a trailer for easier transportation between locations. A flexible peripheral seal damps sound and seals against leakage when the lid is moved to a closed position.

Abstract: A storage apparatus includes a container body, a lid member with an arm, a shaft, an urging member, and a slot. The container body has a top opening. The lid member opens and closes the top opening of the container body, and is held swingably to the container body. The arm extends downward from the lid member. The shaft supports the arm pivotably to the container body, and is fitted into the slot so as to pivotably hold the arm. The urging member urges the lid member upward. The slot extends up-and-downward. Moreover, the container body further has a receiver. The receiver is brought into contact with the lid member so as to support the lid member when the pivotably-supporting shaft moves relatively within the slot so as to move the lid member downward. Therefore, the arm and pivotably-supporting shaft hardly deform because no excessive load acts onto them.

Abstract: A box that is held and opened with one hand includes: a first lid; a second lid; a hinge that rotatably connects the first lid to the second lid so that the box is transitionable between an open orientation, where the lids are apart, and a closed orientation, where the lids are together; a biasing member to urge the first lid and second lid apart, thereby transitioning the box into the open orientation; and a closure to releasably hold the first lid and second lid together, thereby retaining the box in the closed orientation, the first lid and second lid thereby forming a cavity for storing the item. When the closure is released, the biasing member transitions the box into the open orientation. Boxes may be for fishing flies or lures, or for jewelry such as earrings.

Abstract: A lid apparatus for opening/closing an opening of a main body includes a lid with working and back faces. An arm attaches the lid to the main body to be operable for opening/closing. The arm includes a first axis pivotally supporting the arm on the main body around the opening, and a second axis swingably supporting the back face of the lid on the arm. The second axis is located between the gravity center of the lid and the first axis. A regulatory member intervenes between the arm and the back face of the lid to set the working face of the lid in parallel with the opening.

Abstract: A case body is provided with a cover which opens from and closes against the case body. The cover includes a hinge boss rotatably attached to the case body through a hinge pin. On the opposite side of the hinge pin is provided a hook mechanism with which the cover is engaged with the case body to form a closed state. A pressure member contacts and presses to the hinge boss to reduce the rotation speed of the hinge boss. A radius reduction portion is formed so that the outer dimension of the hinge boss is reduced gradually as the cover is getting closer to its full-opened position in order to weaken a frictional contact function with the pressure member.

Abstract: A torsion spring includes a spring body wound by a helical wire, a first arm extending tangently from an end of the spring body, and a second arm extending from the other end of the spring body. The first arm includes sequentially a first portion extending from the spring body, a curved second portion bent toward a first direction from the first portion, and a curved third portion bent toward a different second direction from the second portion. A torsion spring assembly and a releasable casing using the torsion spring are also disclosed.

Abstract: An exemplary cover assembly includes a bezel, and a spring-loaded cover. The bezel includes an opening, a pair of slots, and a pair of pins. The opening is defined in the bezel for accessing a device installed thereto. The slots are defined adjacent opposite ends of the opening respectively. The pins are formed adjacent the slots respectively. The spring-loaded cover covers the opening of the bezel, includes a pair of fixing plates formed thereon slidably received in the slots of the bezel. Each of the fixing plates defines an arcuate groove that slidably receives the corresponding pin of the bezel, where the cover is capable of being pivoted open and shut.

Abstract: A lid device driving an opening operation of a lid body by an urging member such as a coil spring and capable of opening the lid body securely. Of a guide portion for guiding an engaging end of the urging member of the lid device, a first guide portion for guiding the engaging end in moving the lid body from a closed position to an open position is provided with an initial guide portion and a later guide portion so that the urging member releases a large urging force when the engaging end is guided by the initial guide portion.

Abstract: An acceleration/deceleration mechanism is installed for a lid body rotatably supported on a main body. The mechanism includes a forcing device for forcing the lid body toward an open direction, a locking device for maintaining a closed state of the lid body relative to the main body in opposition to the force of the forcing device, and an acceleration/deceleration device situated between the lid body and the main body. The acceleration/deceleration device increasing a speed of opening of the lid body at less than a prescribed angle of opening of the lid body, and decreasing the speed of opening in excess of the prescribed angle of opening.