1. Field of the Invention
The invention relates to an electromagnetic doorlock, particularly to the electromagnetic doorlock with button 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 button detection and power saving device, which usually stays in a low-energy adsorption state; however, when a button 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 button 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 button detection and power saving device according to claim 1.
Based on the features disclosed, the button detection module further includes an elastic member arranged on the flexible body, an abutment body arranged on the elastic member and having a protrusion portion and a positioning flange at a periphery thereof and a seat fixed on the base and having an axial through hole for containing the abutment body and axially telescoping to provide an upward elastic force for the abutment body by the elastic member.
Further, the electromagnet assembly is arranged on a door flame and the adsorption assembly is correspondingly arranged on the door plate; the electromagnet assembly has a containing room with a cover at an opening thereof; the cover has a mounted hole thereon and the button detection module is mounted on the mounted hole.
Further, the seat of the button detection module has a positioning surface at a periphery of the axial through hole for the positioning flange to be abutted when the protrusion portion of the abutment body is upward pushed by the elastic member.
Further, the pressing member includes: a base body having a recessed surface with a second screw hole at a center thereof and an abutment button having a front side facing to the abutment body of the button detection module and a bottom surface with a second screw for screwing to the second screw hole to adjust a height between the abutment button and a surface of the base body.
With the referenced to
The present invention is characterized in that the electromagnet assembly 20 is electronically connected to a button detection module 40 and the adsorption assembly 30 has a pressing member 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
In another applicable embodiment, the base 41 may be integrally molded with the cover 24. The trigger circuit 43 may be a circuit board arranged on the base 41 and has an electrical contact 433 on a surface thereof and a side thereof is connected to a wire 432 and a control circuit 49. The trigger detector 47 has a flexible body 471 elastically maintained at a top of the electrical contact 433. The trigger detector 47 is preferred to be made of insulating materials and to have a convex surface. The flexible body 471 can be moved axially and elastically and a bottom edge thereof corresponding to the electrical contact 433 has an electrical trigger 472; that is, the trigger detector 47 may be an independent telescoping button for the corresponding pressing member 50 pressing. When the electrical trigger 472 is pressed to the electrical contact 433,
In the preferred embodiment, the button detection module 40 further includes an elastic member 42 arranged on the flexible body 471, an abutment body 44 arranged on the elastic member 42 and having a protrusion portion 441 and a positioning flange 442 at a periphery thereof and a seat 45 fixed on the base 41 and having an axial through hole 46 for containing the abutment body 44 and axially telescoping to provide an upward elastic force for the abutment body 44 by the elastic member 42. In the embodiment, the elastic member 42 of the button detection module 40 is a spring 34 and a small spring 48 is arranged between a bottom edge of the abutment body 44 and the flexible body 471. When the abutment body 44 is moved downward, an elastic force of the small spring 48 presses on an bottom edge of the electrical trigger 472 to contact with the electrical contact 433. In the embodiment, the seat 45 has a bottom mounted in the mounted hole 25.
With the referenced to
With the referenced to
The pressing member 50 is mounted on a periphery of the adsorption assembly 30. In the embodiment, the pressing member 50 is fixed at a side of the adsorption assembly 30 and includes a base body 51 having a recessed surface 52 with a second screw hole 53 at a center thereof and an abutment button 54 having a front side corresponding to the abutment body 44 of the button detection module 40 and a bottom surface with a second screw 55 for screwing to the second screw hole 53 to adjust a height between the abutment button 54 and a surface of the base body 51 and a 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 pressing member 50 does not contact with the abutment body 44 on the door flame 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 flame 13 are closed together, the abutment button 54 of the pressing member 50 presses to the abutment body 44 of the button detection module 40 and the abutment body 44 drives the flexible body 471 downward displaced for the electrical trigger 472 to contact with the electrical contact 433 of the trigger circuit 43 in order to trigger the control circuit 49 controlling the electric magnet 22 adsorbing the adsorption plate 32 to be in a lock state. When the door plate 14 is still, the present invention goes into a low power adsorption state. In the embodiment, the electrical trigger 472 may be any conductive material which can trigger the electrical contact 433.
Moreover, the present invention provides the adsorption assembly 30 to assist the button detection module 40 wherein the mounted base 31 is locked on the door plate 14 and the adsorption plate 32 is contact with the corresponding electric magnet 22. With the referenced to
Therefore, the abutment body 44 and the trigger detector 47 are set to be a touchtone axial linkage such that when the door plate 14 is instantly displaced, the flexible body 471 moves upward to separate the electrical trigger 472 and the electrical contact 433 for the trigger circuit 43 rapidly reacting; before the door plate 14 has been pushed and opened, the present invention returns to normal current supply, achieving the desired safety purpose. For example, if the electromagnetic door lock 60 requires 1200 pounds of electromagnetic attraction 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 10 0mA for the electric magnet 22 when the door plate 14 is still and closed such that the electromagnetic door lock 60 produces small attraction to attract the adsorption plate 32. When people push or destroy the door, the trigger circuit 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.
Number | Date | Country | Kind |
---|---|---|---|
101203736 | Mar 2012 | TW | national |