Abstract: An overhead door with a pair of stays and a respective stay holding tension springs. Each of the stays is rotatably fitted to the inner surface of a corresponding lateral wall of a cabinet main body by way of a rotary shaft and have their front end pivotably secured to the door at a position close to the lower edge of the door. Each of the stay holding tension springs are so arranged that each of them is hooked at an end to a position located upward and forward relative to the corresponding rotary shaft on the inner surface of the related lateral wall of the cabinet main body and at the opposite end to a middle point of the corresponding stay.

Abstract: A hinge with a safety shield plate unit is designed not to cover the hinge but to be rotatably fitted to the fixed front shaft of the hinge and be resiliently urged toward the cup-shaped fixing member of the hinge by a resilient member in such a way that the safety shield plate unit is prevented from unnecessarily moving toward the cup-shaped fixing member by causing the anchoring sections of the movable link arm to abut the respective anchored sections of the safety shield plate unit. The hinge main body includes a fixing member fitted to a fixed plate and a cup-shaped fixing member fitted to a movable plate. The members are linked together by movable arms. A safety shield plate unit fitted to the fixed front shaft linking the fixing member and the movable link arm is urged downward to follow and hide the hazardous area defined by the movable arms and the cup-shaped fixing member and having a volume that increases with the opening movement of the movable plate.

Abstract: An overhead door is provided with a pair of stays and respective stay holding tension springs arranged such that, when the door is closed, they are expanded only less than twice of their length so that they are not subjected to excessive loads and hence can have a prolong service life. Each of the stays is rotatably fitted to the inner surface of a corresponding lateral wall of a cabinet main body by way of a rotary shaft and have its front end pivotably secured to the door at a position close to the lower edge of the door. A pair of slide rail assemblies, each comprising an outer rail and an inner rail, are arranged such that the outer rails are fitted longitudinally in parallel with each other on the inner surface of the door and the upper end of each of the inner rails is pivotably secured to the front edge of the roof board of the cabinet main body.

Abstract: An overhead door is provided with a pair of stays and respective stay holding tension springs arranged such that, when the door is closed, they are expanded only less than twice of their length they have when the door is opened so that they are not subjected to excessive loads and hence can have a prolong service life. Each of the stays is rotatably fitted to the inner surface of a corresponding lateral wall of a cabinet main body by way of a rotary shaft and have its front end pivotably secured to the door at a position close to the lower edge of the door. A pair of slide rail assemblies, each comprising an outer rail and an inner rail 9b, are arranged such that the outer rails are fitted longitudinally in parallel with each other on the inner surface of the door and the upper end of each of the inner rails is pivotably secured to the front edge of the roof board of the cabinet main body.

Abstract: With an antitheft lock assembly, the extreme anchor section projecting from the lock main body of the lock assembly is inserted into the corresponding engaging slot of an object to be protected against theft and the cylinder lock of the lock assembly is operated by a matching key to protect the object against theft when the wire rope extending from the lock main body is wound around an immovable pillar. The lock main body may not be obstructed for its operation by the desk top if the object is placed on it and the engaging slot located at a lower position of the object. In the unlocked state, the rotary hook shaft and the single anti-revolution arm axially and eccentrically extending from the lock main body 1 are introduced into the vertically arranged engaging slot H of the object B to be protected against theft.

Abstract: A hinge unit can suitably be used for a portable electronic apparatus such as a portable telephone set comprising a main body and a swing member to be secured to the main body by means of hinges such that the swing member may be folded on the main body for the convenience of storage when not in use and opened from the main body by a desired angle and held to the open position for use. The hinge unit has a simple configuration and hence is compact and lightweight and manufactured at low cost. With each hinge of the hinge unit, a cam shaft 14 is pushed into a spring 13 rigidly secured to the main body 1 along an edge thereof such that the cam shaft 14 becomes axially unreleaseable along axial direction X1. The cam shaft 14 has a protruding section 14g to be fitted into one of the knuckle-shaped end 11b of the swing member 11.

Abstract: An over-the-top type cabinet door prop unit is characterized in that it comprises a fitting case to be rigidly fitted to the inner surface of one of the lateral walls of the cabinet, a movable spring holder vertically movable relative to the fitting case containing it and urged downward by compression springs, a link arm pivotably linked at the upper end to the movable spring holder by a pivot pin and a swing arm swingable around an arm spindle located in a lower portion of the fitting case and having a base section arranged around the arm spindle and linked to the lower end of said link arm by a link pin and an arm section extending from the base section and pivotably linked at the distal end thereof by an anchor pin to an anchor pin bearing secured to the over-the-top type cabinet door and that the pivot where the link arm and the base section of the swing arm is linked by the link pin is located closer to the cabinet door relative to the vertical axial line connecting the pivot pin and the arm spindle when

Abstract: An over-the-top type cabinet door prop unit is characterized in that it comprises a fitting case to be rigidly fitted to the inner surface of one of the lateral walls of the cabinet, a movable spring holder vertically movable relative to the fitting case containing it and urged downward by compression springs, a link arm pivotably linked at the upper end to the movable spring holder by a pivot pin and a swing arm swingable around an arm spindle located in a lower portion of the fitting case and having a base section arranged around the arm spindle and linked to the lower end of said link arm by a link pin and an arm section extending from the base section and pivotably linked at the distal end thereof by an anchor pin to an anchor pin bearing secured to the over-the-top type cabinet door and that the pivot where the link arm and the base section of the swing arm is linked by the link pin is located closer to the cabinet door relative to the vertical axial line connecting the pivot pin and the arm spindle when

Abstract: There is provided an overhead door that is placed on the roof board of a cabinet or the like to which it is fitted when it is opened so that the space available within the cabinet may be maximized. The overhead door 8 is swingably secured to the inner lateral wall surfaces 4, 4 of the cabinet 1 by means of a pair of support arms 14, 14 such that the distal end of each of the support arms is rotatably secured to a rotary shafts 15 on the corresponding lateral wall of the cabinet and the proximal end is pivotably fitted to the inner surface of teh door at a position close to the lower edge thereof by way of a bracket 16.

Abstract: A device for holding a flap door to a horizontal open position under a locked condition can reduce any undesired load that may be applied to the flap door when it is unlocked so that the latter can be opened softly and lightly to avoid tear and wear of the related components and prolong the service life. A bracket 6 is rigidly fitted to a cut-out section 5 of the front edge of the top plate 2 of a hollow body 1 and then the inner cylinder 9a of a damper 9 is rigidly secured to the bracket. As the outer sleeve 9b of the damper 9 is rigidly secured to the flap door 18 by way of a slide rail assembly 19, the flap door 18 is turned open as the outer sleeve 9a of the damper 9 is rotated until a roller pin 11 slidably fitted to the bracket 6 and urged forward by a spring 16 comes into engagement with an oblong notch 10 arranged on the outer peripheral surface of the outer sleeve 9b of the damper 9, when the flap door 18 is in the horizontal open position and locked there.

Abstract: A damper mechanism which includes a cylinder with a movable shaft therein with the shaft having a swingable valve on the outer surface. The end of the swingable valve will contact the cylinder when the shaft is rotated in one direction to form a nonreturn valve due to its association with a partitioning member having an oil passage to communicate chambers formed on opposite sides of the partitioning member. When the shaft is rotated in one direction with the valve moving toward the partitioning member, rotational movement of the shaft in that direction will be dampened by restricted movement of oil from one chamber to the other. When the shaft is rotated in the opposite direction, the valve moves away from the cylindrical surface thus enabling unrestricted rotational movement of the shaft in the opposite direction.

Abstract: A door closer having a return spring for accumulating a recovering force in a door closing direction at the time of opening a door for performing a braking force by a damper at the time of closing the door which comprises a closer body internally containing a mechanism for performing an operation as the damper in a body case, an adjusting arm coupled perpendicularly to a driving shaft for the damper of the closer body to be projected laterally rotatably, a coupling bracket for pivotally securing an upper frame mounting plate directly or indirectly to the end of the adjusting arm via step screws to be horizontally rotatable, and a door mounting arm projected laterally from the closer body for pivotally securing a door mounting bracket to the end of the arm via a step screw to be horizontally rotatable.

Abstract: A damper device for an automatic folding chair enables the seat of the chair to be turned downward to a ready-for use position without being subjected to any braking force when it is lightly pushed down. When the use leaves the seat in the ready-for-use position, it automatically and slowly returns to an upright position under a braking effort exerted thereto.

Abstract: An apparatus for opening and closing a folding bed which includes a bed body pivotally rotatably secured to be opened or closed in a cabinet, a front panel divided into an upper panel fixed to the bed body and a lower panel for maintenance access, the lower panel being pivotally secured at a lower end thereof to a lower front portion of the bed body from a pivotal fulcrum of the bed body so as to solely opened or closed by the pivotal rotation of the bed body at the time of storing the bed body, a guide rail provided with the bed body and the lower panel extending longitudinally of the bed body, and an engaging roller projected from the lower panel and coupled to the guide rail to be movable in the opening and closing direction of the bed body, the lower panel being opened or closed in cooperation with the bed body at the time of opening or closing the bed body.

Abstract: A damper for a flapdoor that does not show any damping effect when its movable shaft of the damper is rotated with the door in one sense whereas it effectively damps the rotary movement of the flapdoor when the movable shaft is rotated with the door in the other sense, wherein a one-way clutch for engaging or disengaging the movable shaft with a movable member depending on the sense of rotation of the movable shaft to cause a viscous shearing drag in the viscous fluid contained in the damper and a power source constitute so many integral parts of a coil spring. A damper for a flapdoor having such an arrangement can have a simplified configuration as compared with a damper provided with a separate coil spring as power source and a separate one-way clutch and therefore can be realized with reduced dimensions.

Abstract: A lock indicator for a caster having a push-button engaged in a push-button mounting hole formed from the outer periphery of a frame to the interior of the frame to be freely pressed for operating a stopper for locking a wheel, wherein the push-button engaged within the push-button mounting hole has cap shape, a transparent portion formed on the top portion thereof, and an indicator having indicating portions for respectively indicating a wheel locking state and a wheel lock releasing state in such a manner that the indicating portions of the indicator correspond to the transparent portion of the push-button to be internally mounted along the inner peripheral surface from the body to the top of the push-button, and one end of the indicator is secured into the frame. Thus, the lock indicator for the caster can simply and accurately confirm the locking state and the lock releasing state of the caster without special attention by precise indicating portions associated with a push-button thereof.

Abstract: A device for detachably and pivotally connecting a pair of objects such as a toilet seat and lid to a toilet bowl. The device includes a receiving member fixedly mounted on the toilet bowl and a main body connected with the toilet seat and lid. The main body includes a spring biased hook assembly engageable with the receiving member and being manually released from engagement with the receiving member to enable separation of the body and receiving member to thereby enable separation of the toilet seat and lid from the toilet bowl.