1. Field of the Invention
The invention relates to an electromagnetic doorlock, particularly to the electromagnetic doorlock with shock detection and power saving device.
2. Description of the Related Art
In the access control monitoring system, the use of an electromagnetic door lock has been very popular. The electromagnetic door lock 10 as shown in
Normally, the power consumption of the electromagnetic door lock 10 of the DC power is about tens of watts. If 12 volts of DC power is supplied, the consumption current maintains hundreds of mill-amperes (mA); thus, the electromagnetic door lock 10 requires a lot of electrical energy.
It is considerable that the safety monitoring system of the electromagnetic door lock requires practical applicability and controllability; therefore, energy saving design requires further improvement.
It is a primary object of the present invention to provide an electromagnetic doorlock with shock detection and power saving device, which usually stays in a low-energy adsorption state; however, when a shock detection module is triggered, the electromagnetic doorlock returns to normal lock state for achieving power saving and access control security effects.
It is a second object of the present invention to provide an electromagnetic doorlock with shock detection and power saving device having an adsorption plate with buffering displacement design for an electric magnet to have sufficient time to resume operation to ensure the security of access control.
In order to achieve the above objects, the present invention includes an electromagnetic doorlock with shock detection and power saving device according to claim 1.
Based on the features disclosed, the electromagnet assembly is arranged on a door frame and the adsorption assembly is correspondingly arranged on the door plate and the electromagnet assembly has a containing room with a cover at an opening thereof and the cover has a mounted hole thereon for mounting the shock detection module.
Further, the shock detection module further includes: the plate having a post hole with an upward opening at a center thereof and a hollow portion at an inner side thereof; a shaft having a flange at a middle section and a small spring arranged on a lower section thereof and arranged in the post hole; a positioning sleeve having a hook body at a side thereof for fixing on a fixed hole arranged at a periphery of the post hole and corresponding to the post hole has a through hole for arranging an upper section of the shaft; a recessed flexible body across set on the elastic member and having a recessed center corresponding to a top of the shaft; and an electrical trigger arranged on the recessed flexible body and corresponding to a trigger area at a bottom surface of the shock sensor. In the preferred embodiment, the shock sensor is composed of a G-sensor.
Furthermore, the suppressing unit includes: a base having a recessed surface with a screw hole in a center thereof and an abutment button having a front face corresponding to the abutment body of the shock detection module and a bottom face with a screw for screwing to the screw hole to adjust a height between the abutment button and a surface of the base.
With reference to
The main features of the present invention comprise the electromagnet assembly 20 electronically connected to a shock detection module 40 and the adsorption assembly 30 having a suppressing unit 50 at a side thereof. The electromagnet assembly 20 includes a case 21 and an electric magnet 22 arranged in the case 21. The electric magnet 22 includes a core and a coil around the core to provide an electromagnetic attraction and the case 21 may include a resin coated around the electric magnet 22 or an outer housing; however, it is a prior art and thus will not be described in details here. In the preferred embodiment as shown in
With the reference to
With the referenced to
With the referenced to
A suppressing unit 50 is mounted on a periphery of the adsorption assembly 30. In the embodiment, the suppressing unit 50 is fixed at a side of the adsorption assembly 30 and includes a base 51 having a recessed surface 52 with a screw hole 53 in a center thereof and an abutment button 54 having a front face corresponding to the abutment body 44 of the shock detection module 40 and a bottom face with a screw 55 for screwing to the screw hole 53 to adjust a height between the abutment button 54 and a surface of the base 51 and pressed degree between the abutment button 54 and the abutment body 44 as shown in
With referenced to
Based on the features disclosed, when the door plate 14 is opened, the abutment button 54 of the suppressing unit 50 does not contact with the abutment body 44 on the door frame 13 and the control circuit 49 does not supply the normal power to the electric magnet 22. When the door plate 14 and the door frame 13 are closed together, the abutment button 54 of the suppressing unit 50 presses to the abutment body 44 of the shock detection module 40 and the abutment body 44 drives the shock sensor 43 inward displaced for the trigger zone 443 to contact with the electrical trigger 48 on the recessed flexible body 47 in order to trigger the control circuit 49 controlling the electric magnet 22 adsorbing the adsorption plate 32 to be in a lock state. After the door plate 14 is still, the present invention goes into a low power adsorption state. In the embodiment, the electrical trigger 48 may be any conductive material which can trigger the trigger zone 433. With the referenced to
The present invention provides the shock detection module 43 composed of the shock sensor 43 as a sensing member to sense the external environment change. In the preferred embodiment, the shock sensor 43 may be composed of an acceleration sensor which is called G-sensor hereafter. The G-sensor senses objects in a motion state generating the acceleration of gravity in a three-axis space and so-called a linear accelerometer. The G-sensor can sense the minute changes in the physical quantity, such as displacement and vibration. The shock sensor 43 is arranged on the spring 42; therefore, once the door plate 14 has a little displacement, the shock detection module 40 immediately senses the shock and trigger the control circuit 49 in a very short time to supply the normal power to the electric magnet 22 and to be in a lock state.
Therefore, the present invention provides the shock sensor 43 to link to the elastic member 42 such that when the door plate 14 is instantly displaced, the shock sensor 43 rapidly reacts through the elastic force of the elastic member 42; before the door plate 14 has been pushed and opened, the present invention returns to normal current supply, achieving the desired safety purpose. If the electromagnetic door lock 60 requires 1200 pounds of electromagnetic adsorption to stay in the lock state, the electromagnetic door lock 60 requires 500 mA current. Moreover, to maintain normal power supply for 24 hours, the power consumption is considerable. For this reason, the present invention provides small current such as 100 mA for the electric magnet 22 when the door plate 14 is still and closed such that the electromagnetic door lock 60 produces small adsorption to adsorb the adsorption plate 32. When people push or destroy the door, the shock sensor 43 reacts rapidly to return to the normal power supply and stay in a lock state with normal current, achieving access control security and saving power.
Moreover, the present invention provides the adsorption assembly 30 to assist the shock detection module 40 wherein the mounted base 31 is locked on the door plate 14 and the adsorption plate 32 corresponding to the electric magnet 22 is boned contact. With the referenced to
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
Number | Date | Country | Kind |
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100149727 A | Dec 2011 | TW | national |
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Number | Date | Country | |
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20130168976 A1 | Jul 2013 | US |