Abstract: A key box construction, wherein a shaft of a door is provided with two parallel flat surfaces in axial extensions of the shaft, an outer cover is provided with bearing parts which each comprise a groove having the same width between parallel flat surfaces of the groove as the width between the two parallel flat surfaces of each axial extension and at an angle. The door is provided at the lower end portion thereof with hooks, whereby the door is hooked directly on an inner case by the hooks and a latch.

Abstract: The invention relates to a key box construction, wherein shafts of a door are each provided with two parallel flat surfaces in the direction of rotary shafts, an outer cover is provided with bearing parts which each comprise a groove having the same width at an angle which does not allow the door to be taken away at the time of usual opening and closing of the door, and the door is provided at the lower end portion thereof with hooks, whereby the door is hooked directly on an inner case by means of the hooks and a latch.

Abstract: A connecting adaptor for an electric cylinder to operate a door lock is provided having a screw type connecting member assembly D1 comprising a screw type connecting member 2, in which a cam bar 4, a cam bar extruding plates 5, and a cam bar return spring 6 are incorporated, is screwed into an internal thread portion C1 of an existing lock case C of a door, that a connecting plate assembly D2 comprising a connecting plate 3, in which a locking pin 7 and a locking pin return spring 8 are incorporated, is secured to the electric cylinder 1 with connecting plate fixing screws 9, that a projection (a) at the lower end of the connecting plate 3 secured to the electric cylinder 1 is inserted into a square hole b2 of the screw type connecting member 2, that a screw C6 is fastened into the lock case C with a screw driver C7, so that on one hand, the stop of rotation of the screwed screw type connecting member assembly D1 is made, and on the other hand, the electric cylinder 1 is fixed in such a manner that the cam ex

Abstract: A simple crime prevention alarm device for the windows of dwelling houses or the like. The alarm device can be simply and easily attached to and placed on various kinds of objects, such as windows or the like, to prevent crime. The manufacturing cost and the attachment cost are reduced, and further provide a simple alarm device which can be used as an urgent call means.

Abstract: The present disclosure provides an electric cylinder for actuating a door lock which may be easily attached to the existing door lock to prevent picking completely, and an electric cylinder door lock not having a keyhole.

Abstract: A simple crime prevention alarm device for the windows of dwelling houses or the like. The alarm device can be simply and easily attached to and placed on various kinds of objects, such as windows or the like, to prevent crime. The manufacturing cost and the attachment cost are reduced, and further provide a simple alarm device which can be used as an urgent call means.

Abstract: Problems of the Invention:

Abstract: In a locking system constituted by a housing, a slider provided in the housing and including magnetic lock pins, and a pair of plates provided in the housing so that a magnetic card key can be inserted between the plates, a lock setting changing unit is configured such that a disc rotatable to change magnetic lock setting is inserted into at least one circular recess portion of a slider, the disc is provided with engagement means for preventing a setting tool from being relieved in the middle of changing the magnetic lock setting, the setting tool is inserted into a center hole of the rotatable disc, and after the disc is rotated by the setting tool so that the magnetic lock setting can be changed into a new magnetic lock setting position, the setting tool is allowed to be relieved from the disc.

Abstract: In a locking system constituted by a housing, a slider provided in the housing and including magnetic lock pins, and a pair of plates provided in the housing so that a magnetic card key can be inserted between the plates, a lock setting changing unit is cunfigured such that a disc rotatable to change magnetic lock setting is inserted into at least one circular recess portion of a slider, the disc is provided with engagement means for preventing a setting tool from being relieved in the middle of changing the magnetic lock setting, the setting tool is inserted into a center hole of the rotatable disc, and after the disc is rotated by the setting tool so that the magnetic lock setting can be changed into a new magnetic lock setting position, the setting tool is allowed to be relieved from the disc.

Abstract: A magnetic card switch designed so that it's possible to turn on the switch, hold it in an "on" state, turn it off and open the switch casing by using magnetic cards. A plurality of magnet lock pins (21) accommodated in a plurality of holes (10) form a predetermined code, which is provided in a slider. Slider lock means being fixedly disposed in a casing along the slider, the slider lock means having a plurality of holes (8) forming a predetermined code, which properly receive one end of the magnet lock pins, and a switch (24) disposed to correspond to the slider. When a first magnetic card (31) is inserted into the casing means, the lock pin (21a.sub.2) of the slider move in correspondence with a magnetic code of the card to unlock the slider, so that the slider moves to the backward slide position to change over the switch (24) from an "off" to an "on" or from an "on" to an "off" state.

Abstract: The present invention relates to a personal security case which includes a holder attached to a wall or the like, and a security case removably held by the holder. The security case has a case body and a lid which is attached to the case body in such a manner as to be opened and closed as desired. The personal security case also includes a lock mechanism provided thereon to enable the case body and the lid to be locked respectively to the holder and to the case body in a closed state either simultaneously or independently and to further permit unlocking of the case body and the lid either simultaneously or independently.