CN201206370Y

CN201206370Y - Magnetic lock

Info

Publication number: CN201206370Y
Application number: CNU2008200462458U
Authority: CN
Inventors: 梁美卿
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-11
Filing date: 2008-04-11
Publication date: 2009-03-11
Anticipated expiration: 2018-04-11

Abstract

The utility model discloses a magnetic lock which comprises iron plates, a lock shell, an electromagnet, a stop collar, a pop rivet, a sensor and a control circuit, wherein, the electromagnet is arranged in the lock shell to generate magnetism to cause the iron plates to be sucked together by attraction; the stop collar is fixed in the lock shell; the pop rivet is composed of a rivet cap, a rivet body and a rivet tip, wherein, the rivet cap is arranged in contact with a rear cap supporting the lock shell, the rivet body is sheathed with a spring and penetrates through the stop collar, and the rivet tip is connected with the electromagnet; the sensor is fixed on the lock shell; the control circuit is used for acting on the iron plates in additional pull, the sensor is triggered to generate a switching control signal when the electromagnet is drawn by magnetism and the pop rivet is driven to move to the rivet cap in the additional pulling direction to contact the stop collar, and the control circuit automatically changes voltage/current output to the electromagnet according to the switching control signal. The magnetic lock only needs weak current to sustain small pull to save energy in normal work, and automatically switches the pull to the large pull of strong current when confronting strong external pull. The magnetic lock has the functions of energy conservation and intelligent defense, and the advantage of low cost.

Description

The magnetic force lock

Technical field

The utility model relates to a kind of sealed device, especially relates to a kind of magnetic force lock that adopts mechanical position limitation and realize electromagnet generation tension variations by change voltage/current size.

Background technology

Known in the market magnetic force lock is the fixedly product of pulling force and current parameters, by the fixing magnetic force adhesive that electromagnet produced of the number of turn locking pulling force that iron plate realization sets that continues: coil and silicon steel body by static line footpath, the number of turn are formed electromagnet, produce the fixedly electric current of amperage when inserting the safe voltage of setting; Produce the fixing magnetic field intensity adhesive iron plate of continuing simultaneously, thereby realize the pulling force requirement set.

The shortcoming of prior art is that electric current is big, and pulling force is little, and volume is big, the cost height, and do not possess intelligent alarm function.Existing product is by specification manufacturings such as the product size that designs, electric current, pulling force, and the problem of bringing thus is: along with the increase of pulling force specification requirement, require the proportional increase of number of ampere turns of electromagnet; Because super-high-current can bring problem of temperature rise, increase pulling force so coil turn can only be increased when increasing electric current, and this can cause the lock body size to become big and cost increases.

The utility model content

Technical problem to be solved in the utility model is to propose a kind of magnetic force lock, interlock by mechanical position limitation, resetting-mechanism and electric transducer, controller, to realize the using little pulling force of little electric current to carry out energy under the normal operating conditions, and when meeting with automatically switching to high protected working state when the outside is powerful to be invaded, produce the big pulling force of big electric current, and possessed intelligent functions such as onsite alarming and alarm signal output.

For reaching above-mentioned purpose, the utility model discloses a kind of magnetic force lock, comprising: the iron plate of continuing; Lock housing; Be arranged at and produce will the continue electromagnet of iron plate adhesive of magnetic force in the lock housing; Be fixed in the stop collar of lock housing; By the sharp blind rivet of forming of the head of a nail, nail body and nail, the head of a nail is conflicted with the bonnet that supports lock housing and is provided with, and follows closely body socket spring and passes stop collar, and the nail point connects electromagnet; Be fixed on the sensor on the lock housing; Be used for when adding pulling function in the iron plate of continuing, affect electromagnet and drive blind rivet by magnetic force along adding the pulling direction when moving to its head of a nail contact stop collar, trigger sensor and produce a switch-over control signal, change the control circuit of the voltage/current that exports electromagnet to according to this switch-over control signal automatically.

More excellent, magnetic force lock of the present utility model also comprises: the switch-over control signal that is used for producing according to sensor produces the warning circuit of alarm signal.

More excellent, described sensor is a microswitch.

More excellent, described spring comprises a plurality of, and it is socketed on respectively on the nail body of a plurality of blind rivets, and a terminal electromagnet that connects of described spring, and another end contacts at the head of a nail of blind rivet.

More excellent, described spring and described blind rivet are 4.

More excellent, described electromagnet is made up of the coil and the silicon steel body of static line footpath, the number of turn.

Compared with prior art, the utlity model has following beneficial effect:

Because the magnetic force lock only needs certain pulling force to keep locked state,, thereby has energy-saving advantages so electromagnet only needs little electric current to produce little pulling force; And when magnetic force was locked the powerful invasion in experience outside, control circuit automatic conversion of moment exported big electric current to electromagnet, made electromagnet be in the high security protection state that produces big pulling force, simultaneously output alarm signal; After external force disappears, by resume work the automatically power save mode of work of control circuit.Therefore, the utility model can be realized little electric current on the lock body of existing dimensions, pulling force is taken into account greatly, has lower-cost advantage; And the utility model possesses the alarm signal output function simultaneously, has intelligentized advantage.

Description of drawings

Fig. 1 is that schematic diagram is cutd open in side of the present utility model.

Fig. 2 is that schematic diagram is cutd open in front of the present utility model.

The specific embodiment

In conjunction with illustrated in figures 1 and 2, magnetic force lock of the present utility model comprises: the iron plate 8 of continuing; Lock housing 5; Be arranged at and produce will the continue electromagnet 6 of iron plate 8 adhesives of magnetic force in the lock housing 5; Be fixed in the stop collar 1 of lock housing 5; By the sharp blind rivet of forming 3 of the head of a nail, nail body and nail, the head of a nail is conflicted with the bonnet 4 that supports lock housing 5 and is provided with, and follows closely body socket spring 2 and passes stop collar 1, and the nail point connects electromagnet 6; Be fixed on the sensor 7 on the lock housing 5; Be used for when adding pulling function in the iron plate 8 of continuing, affect electromagnet 6 and drive blind rivet 3 by magnetic force along adding the pulling direction when moving to its head of a nail contact stop collar 1, trigger sensor 7 and produce a switch-over control signal, change the control circuit of the voltage/current that exports electromagnet 6 to according to this switch-over control signal automatically.

Wherein, described sensor 7 is a microswitch.Described spring 2 comprises a plurality of, and it is socketed on respectively on the nail body of a plurality of blind rivets 3, and a terminal electromagnet 6 that connects of described spring 2, and another end contacts at the head of a nail of blind rivet 3; Such as, described spring 2 is 4 with described blind rivet 3.And described electromagnet 6 is made up of the coil and the silicon steel body of static line footpath, the number of turn.

The operating principle of magnetic force lock of the present utility model is as follows:

In normal operation, give electromagnet 6 by reduced-current/voltage of control circuit output, make the magnetic field of electromagnet 6 produce a less pulling force to the iron plate 8 of continuing, iron plate 8 adhesives will continue.Being provided with 4 springs 2 as the bottom with lock housing 5 is example, the initial tensile force of supposing each spring 2 is set at 8kg, the total pulling force that 2 pairs of electromagnets of total 4 springs 6 produce is 32kg, the pulling force that adds that promptly needs 32kg at least could move up by the pulling force that adds that iron plate 8 pulling electromagnets 6 edges of continuing make progress.

Surpass the pulling force limit when adding pulling force, such as, greater than 32kg add pulling force the time, this adds pulling force wishes the magnetic force lock is opened, even the iron plate 8 of continuing breaks away from the magnetic field adhesive of electromagnets 6; At this moment, because the electromagnet 6 adhesives iron plate 8 of continuing, the electromagnet 6 and the iron plate 8 of continuing are kept relative to static and towards moving, by moving on the electromagnet 6 drive blind rivets 3, compress spring 2; When electromagnet 6 reaches the maximum displacement (generally being set at 1 to 1.5mm) that makes progress, at this moment, the head of a nail of blind rivet 3 moves to just and contacts at stop collar 1, thereby touch sensor 7 and send switch-over control signal, and automatically change the voltage/current that exports electromagnet 6 to according to this switch-over control signal by control circuit, make continue iron plate 8 of 6 pairs of magnets produce bigger the suction-combining force, thereby prevent that external force from illegally opening the magnetic force lock.

After adding the pulling force disappearance, electromagnet 6 will return to the position of operate as normal again under the effect of spring 2, and the switch-over control signal of sensor 7 is eliminated simultaneously, and control circuit gives electromagnet 6 its operate as normal of output required current/voltage again.

And, surpassing the pulling force limit when adding pulling force, sensor 7 sends switch-over control signal, and on the one hand, the switch-over control signal that control circuit sends according to sensor 7 is controlled to the big current/voltage of electromagnet 6 outputs; On the other hand, warning circuit also sends alarm signal according to the switch-over control signal that sensor 7 sends, and caution magnetic force lock meets with illegal invasion.

Therefore, magnetic key operated lock of the present utility model only needs certain pulling force to keep locked state, so electromagnet Only need little electric current to produce little pulling force, thereby have energy-conservation advantage; And when the outside brute force of magnetic key operated lock experience During invasion, the big electric current of control circuit automatic conversion output of moment is in electromagnet and produces greatly to electromagnet The high security protection state of pulling force, simultaneously output alarm signal; After external force disappears, automatically extensive by control circuit The return to work power save mode of the work of doing. Therefore, the utility model can be real on the lock body of existing dimensions Existing little electric current, big pulling force are taken into account, and have energy-conservation and lower-cost advantage; And the utility model is tool simultaneously Standby alarm signal output function has intelligentized advantage.

Claims

1, a kind of magnetic force lock comprises: the iron plate of continuing (8); Lock housing (5); Be arranged at and produce will the continue electromagnet (6) of iron plate (8) adhesive of magnetic force in the lock housing (5); It is characterized in that, also comprise:

Be fixed in the stop collar (1) of lock housing (5);

By the sharp blind rivet of forming (3) of the head of a nail, nail body and nail, the head of a nail is conflicted with the bonnet (4) that supports lock housing (5) and is provided with, and follows closely body socket spring (2) and passes stop collar (1), and the nail point connects electromagnet (6);

Be fixed on the sensor (7) on the lock housing (5);

Be used for when adding pulling function in the iron plate of continuing (8), affect electromagnet (6) and drive blind rivet (3) by magnetic force along adding the pulling direction when moving to its head of a nail contact stop collar (1), trigger sensor (7) and produce a switch-over control signal, change the control circuit of the voltage/current that exports electromagnet (6) to according to this switch-over control signal automatically.

2, magnetic force lock according to claim 1 is characterized in that, also comprises: the switch-over control signal that is used for producing according to sensor (7) produces the warning circuit of alarm signal.

3, magnetic force lock according to claim 1 is characterized in that described sensor (7) is a microswitch.

4, magnetic force lock according to claim 1, it is characterized in that described spring (2) comprises a plurality of, it is socketed on respectively on the nail body of a plurality of blind rivets (3), and a terminal electromagnet (6) that connects of described spring (2), another end contacts at the head of a nail of blind rivet (3).

5, magnetic force lock according to claim 4 is characterized in that described spring (2) is 4 with described blind rivet (3).

6, magnetic force lock according to claim 1 is characterized in that, described electromagnet (6) is made up of the coil and the silicon steel body of static line footpath, the number of turn.