CN207700873U - Bistable electronic lock for automatic door - Google Patents

Abstract

The utility model discloses an automatic bistable electronic lock for door, which comprises a fixing frame, install two-way holding formula electro-magnet on the mount, two-way holding formula electro-magnet passes through the connecting piece and installs at least one locking lever, owing to adopt two-way holding formula electro-magnet as power, only be locking or the circular telegram in the twinkling of an eye of unblanking, lock or unblanking back need not the holding current, control circuit's structure has effectively been simplified, adopt a great electric capacity to get the electric work demand that can also satisfy to lock or unblank from the gate host computer of automatically-controlled door even, the user can set for the outage as required and unblank or the outage is locked, can satisfy the fire control requirement and can satisfy the security protection requirement.

Description

Bistable electronic lock for automatic door

technical field

The utility model relates to a lockset, in particular to an electronic lock for automatic doors.

Background technique

The electronic lock that automatic door is used in the prior art has two kinds, and a kind of is power-on lock, and another kind is power-off lock. The power-on lock means that the door lock is in the locked state when the power is on, and the door lock is in the unlocked state when the power is off, which meets the fire safety requirements, but does not meet the security safety requirements. The power-off lock means that the door lock is in the locked state when the power is off, and the door lock is in the unlocked state when the power is on, which meets the security safety requirements, but does not meet the fire safety requirements. Users cannot switch the working states of the two locks according to actual needs.

In addition, the current power-on or power-off locks for automatic doors are in one working state when they are powered on, and they are in another working state when they are powered off. The lock needs to maintain current during work, which leads to high energy consumption for automatic door electronic locks. , additional independent power supply is required, which undoubtedly increases the cost of the equipment.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a bistable electronic lock for automatic doors, which can be set by the user to meet the requirements of fire protection and security, as well as the requirements of energy saving and environmental protection.

The technical scheme that the utility model solves its technical problem adopts is:

A bistable electronic lock for an automatic door, comprising a fixed frame, on which a bidirectional holding electromagnet is installed, and at least one locking bar is installed on the bidirectional holding electromagnet through a connecting piece.

The two-way holding electromagnet includes a casing, a static iron core and a moving iron core, the static iron core is installed in the casing, and a magnetic steel assembly is installed between the casing and the static iron core; the static iron core The iron core is provided with a guide hole, and the moving iron core is provided with a guide shaft inserted into the guide hole, and the position where the guide shaft extends out of the guide hole is provided with a limit mechanism; the upper end of the static iron core and The lower end of the moving iron core is provided with an inner annular groove and an outer annular groove, a spring assembly is installed in the inner annular groove, a coil assembly is installed in the outer annular groove, and the lower end of the coil assembly is connected to the static The outer annular groove on the iron core is fixedly connected; the connecting piece is connected with the moving iron core.

The spring assembly includes an inner spring sleeved on the guide shaft and an outer spring sleeved outside the inner spring.

The casing and the static iron core are fixed on a fixed disk, the fixed disk is made of non-ferromagnetic material, and the magnetic steel assembly is sandwiched between the outer wall of the static iron core and the inner wall of the casing.

The center of the moving iron core is provided with a fixing hole, and the upper end of the guide shaft is provided with a fixing part. After the lower end of the guide shaft passes through the fixing hole, a chassis is installed on the top of the moving iron core. The fixing part is sandwiched between the top of the moving iron core and the chassis.

The upper end of the casing and the lower end of the moving iron core are provided with corresponding positioning holes, and positioning pins are installed in the positioning holes.

The beneficial effects of the utility model are: the bistable electronic lock for automatic doors of the utility model adopts a bidirectional holding electromagnet as the power, and only energizes at the moment of locking or unlocking, and does not need to maintain the current after locking or unlocking, effectively The structure of the control circuit is simplified, and even a large capacitor is used to take power from the door control host of the automatic door to meet the working requirements of locking or unlocking. Users can set power-off unlocking or power-off locking according to needs. , which can not only meet the fire protection requirements but also meet the security requirements, and also meet the energy saving and environmental protection requirements.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic structural view of a bidirectional holding electromagnet;

Fig. 3 is a structural exploded schematic diagram of a bidirectional holding electromagnet;

Fig. 4 is a sectional view of the suction state of the two-way holding electromagnet;

Fig. 5 is a sectional view of the separated state of the bidirectional holding electromagnet.

Detailed ways

Referring to Fig. 1, a bistable electronic lock for an automatic door includes a fixed frame 20 on which a bidirectional holding electromagnet 21 is installed, and the bidirectional holding electromagnet 21 is installed with at least A lock bar 23, the lower end of the fixed frame 20 is bent to form a front stop 24, and the upper end of the fixed frame 20 is bent to form a rear stop 25. The lock bar 23 runs through the front stop 24 in turn, 22 and a rear stopper 25, the middle part of the lock bar 22 is fixedly connected with the linkage 22 through an open retaining ring.

2 to 5, the two-way holding electromagnet 21 includes a housing 1, a static iron core 2 and a moving iron core 3, the static iron core 2 is installed in the housing 1, and between the housing 1 and the moving iron core 3. A magnetic steel assembly 5 (permanent magnet) is installed between the static iron cores 2; the static iron core 2 is provided with a guide hole, and the moving iron core 3 is provided with a guide shaft 6 inserted into the guide hole, and the guide The position where the shaft 6 extends out of the guide hole is provided with a limit mechanism, and the limit mechanism includes a distance fixing member 14 installed on the guide shaft 6, a washer and a fixing nut. The upper end of the static iron core 2 and the lower end of the moving iron core 3 are provided with an inner annular groove and an outer annular groove, a spring assembly is installed in the inner annular groove, and a spring assembly is installed in the outer annular groove. The coil frame 10 and the electromagnetic coil 4 constitute the coil assembly, the lower end of the coil assembly is fixedly connected with the outer annular groove on the static iron core 2, and the coil assembly is fixed with epoxy resin.

The spring assembly includes an inner spring 11 sleeved on the guide shaft 6 and an outer spring 12 sleeved outside the inner spring 11. It adopts a double spring structure, which not only has higher fatigue resistance, but also has a When 2 and the moving iron core 3 are attracted to each other, it can play a role of buffer protection, avoid collision between the static iron core 2 and the moving iron core 3, reduce noise, and improve the service life of the product at the same time.

The casing 1 and the static iron core 2 are fixed on a fixed plate 7, the magnetic steel assembly 5 is sandwiched between the outer wall of the static iron core 2 and the inner wall of the casing 1, the casing 1, the static iron core 2 and the moving iron core 3 are made of ferromagnetic materials, and the fixed disk 7 is made of non-ferromagnetic materials, so that the magnetic field of the magnetic steel assembly 5 will be conducted in the direction of the moving iron core, and installed at the bottom of the fixed disk 7 There is an insulating disc 8 which acts as a magnetic shield. The insulating disc 8, the fixed disc 7 and the static iron core 2 are fixed as a whole by screws.

The center of the moving iron core 3 is provided with a fixing hole, the upper end of the guide shaft 6 is provided with a fixing part, and after the lower end of the guide shaft 6 passes through the fixing hole, it is installed on the top of the moving iron core 3 There is a chassis 13, and the chassis 13 and the moving iron core 3 are fixed as a whole by screws, and the fixed part is sandwiched between the top of the moving iron core 3 and the chassis 13, so that the guide shaft 6 and the moving iron core 3 are also fixed into a One piece, compact structure.

The upper end of the housing 1 and the lower end of the moving iron core 3 are provided with corresponding positioning holes, and a positioning pin 9 is installed in the positioning hole, and the positioning pin 9 is parallel to the guide shaft 6 to prevent the moving iron core 3 from rotating in the circumferential direction. .

When in the separated state, the preloaded elastic force of the spring assembly is greater than the attractive force of the magnetic steel assembly 5, so that the moving iron core 3 will not be attracted to the past, so that the static iron core 2 and the moving iron core 3 remain separated, that is, the moving iron core 3 Located at a fixed point, when the electromagnetic coil 4 is energized in the forward direction, the direction of the magnetic field generated by the electromagnetic coil 4 is consistent with the direction of the magnetic field of the magnetic steel assembly 5, the magnetic fields of the two are superimposed, and the suction force generated is greater than the elastic force of the spring assembly, so that the moving iron The core 3 moves to the static iron core 2 and pulls in. After the electromagnetic coil 4 is powered off, the magnetic steel assembly 4 forms a closed magnetic circuit with the shell 1, the static iron core 2 and the moving iron core 3. The static iron core 2 and the moving iron core The suction force between 3 is greater than the elastic force of the spring assembly, so that the static iron core 2 and the moving iron core 3 remain in the suction state, that is, the moving iron core 3 remains at another positioning point. When the electromagnetic coil 4 is energized in reverse, the direction of the magnetic field generated by the electromagnetic coil 4 is opposite to the direction of the magnetic field of the magnetic steel assembly 5, and the magnetic field generated by the electromagnetic coil 4 and the magnetic field of the magnetic steel assembly 5 cancel each other out. Resetting under the action of elastic force realizes movement and maintenance between two positioning points.

The utility model adopts a two-way holding electromagnet as the power, drives the connecting piece 22 to move upward when the moving iron core 3 is attracted, only the lock rod 23 retracts to unlock, and drives the connecting piece 22 to move upward when the moving iron core 3 is attracted and separated. When moving down, only the lock bar 23 stretches out to be locked, and the power is only energized at the moment of locking or unlocking. After locking or unlocking, there is no need to maintain the current, which effectively simplifies the structure of the control circuit, and even adopts a larger capacitor from the automatic lock. The door's access control host can also meet the working requirements of locking or unlocking. Users can set power-off unlocking or power-off locking according to needs, which can meet both fire protection requirements and security requirements, as well as energy conservation and environmental protection. Require.

The above embodiments cannot limit the scope of protection of the present invention, and equivalent modifications and changes made by those in the technical field without departing from the overall concept of the present invention still fall within the scope of the present invention.

Claims (6)

1. A bistable electronic lock for automatic doors, characterized in that it includes a fixed frame (20), on which a two-way holding electromagnet (21) is installed, and the two-way holding electromagnet (21) At least one locking rod (23) is installed through the connecting piece (22). 2. The bistable electronic lock for automatic doors according to claim 1, characterized in that the two-way holding electromagnet (21) includes a casing (1), a static iron core (2) and a moving iron core (3) , the static iron core (2) is installed in the casing (1), and a magnetic steel assembly (5) is installed between the casing (1) and the static iron core (2); the static iron core (2) A guide hole is provided, the moving iron core (3) is provided with a guide shaft (6) inserted into the guide hole, and the part of the guide shaft (6) protruding out of the guide hole is provided with a limit Mechanism; the upper end of the static iron core (2) and the lower end of the moving iron core (3) are provided with an inner annular groove and an outer annular groove, a spring assembly is installed in the inner annular groove, and the outer annular groove A coil assembly is installed in the groove, the lower end of the coil assembly is fixedly connected to the outer annular groove on the static iron core (2), and the connecting piece (22) is connected to the moving iron core (3). 3. The bistable electronic lock for automatic doors according to claim 2, characterized in that the spring assembly includes an inner spring (11) sleeved on the guide shaft (6) and an inner spring (11) sleeved on the inner spring ( 11) Outer outer spring (12). 4. The bistable electronic lock for automatic doors according to claim 2, characterized in that the housing (1) and the static iron core (2) are fixed on a fixed disk (7), and the fixed disk (7 ) is made of non-ferromagnetic material, and the magnetic steel assembly (5) is sandwiched between the outer side wall of the static iron core (2) and the inner side wall of the casing (1). 5. The bistable electronic lock for automatic doors according to claim 2, characterized in that a fixed hole is provided in the center of the moving iron core (3), and a fixed part is provided at the upper end of the guide shaft (6), After the lower end of the guide shaft (6) passes through the fixing hole, a chassis (13) is installed on the top of the moving iron core (3), and the fixing part is clamped on the moving iron core (3) between the top and chassis (13). 6. The bi-stable electronic lock for automatic doors according to claim 2, characterized in that the upper end of the casing (1) and the lower end of the moving iron core (3) are provided with corresponding positioning holes, and in the positioning Locating pins (9) are installed in the holes.