Search

CN-117468812-B - Magnetic-type limiting unlocking component and electric door closer comprising same

CN117468812BCN 117468812 BCN117468812 BCN 117468812BCN-117468812-B

Abstract

The invention relates to a magnetic type limiting unlocking component and an electric door closer comprising the same, wherein the limiting unlocking component comprises a limiting bracket, a rotating block, a permanent magnet and a force unloading and holding mechanism, the rotating block is pivoted in an inner cavity of the limiting bracket, a left-side lower part of the rotating block is provided with a left-protruding limiting end head, the left wall of the inner cavity of the limiting bracket is provided with a limiting groove matched with the limiting end head, the right side of the rotating block is fixedly provided with an electromagnet, the top surface of the rotating block is provided with an arc groove, and the force unloading and holding mechanism comprises a force unloading spring and a ball. The invention has the advantages that the permanent magnet is directly fixed on the sliding block and is attracted with the unpowered electromagnet when in locking limit, namely, the normally open door is in a state without consuming electric energy, the energy is saved, the door is automatically attracted and limited when in place, the use is convenient, the impact of the forced door opening on the fixed pin shaft can be lightened by the novel design of the unloading force retaining mechanism, the rotating block is not blocked by the unloading force spring, the accident of the forced door opening failure is avoided, the improved structure is simpler, the parts are fewer, and the cost is reduced.

Inventors

  • WANG KAI
  • MA LIANG
  • WANG XUN
  • YAN YU

Assignees

  • 武汉凯斯玛特智能控制设备有限公司

Dates

Publication Date
20260505
Application Date
20231102

Claims (9)

  1. 1. The utility model provides a spacing unblock subassembly of magnetic attraction type, its characterized in that includes spacing support (1), rotating block (2), permanent magnet (3) and unloads the power and keep the mechanism, rotating block (2) through the middle part pin joint in spacing support (1) inner chamber, the left side lower part of rotating block (2) is equipped with left convex spacing end (4), spacing support (1) inner chamber left wall be equipped with spacing end (4) complex spacing groove (5), the right side of rotating block (2) is fixed with electro-magnet (6), the top surface of rotating block (2) is equipped with circular arc groove (7), it includes and unloads power spring (8) and ball (9) to unload power spring (8) vertical setting and top and spacing support (1) inner chamber roof supports tightly, the lower extreme of unloading power spring (8) will ball (9) compress tightly in circular arc groove (7), permanent magnet (3) are fixed to be located door closer slider (10) top surface and in slider (10) top surface form and are in the cooperation with electromagnet (11) is in the place of locking groove (11) when locking down, the rotating block (2) rotates around the middle pivot joint to correspondingly limit and lock or unlock the sliding block (10); The utility model discloses a lock device for the automobile, including fixed pin (14) and rotating block (2), including spacing support (1), fixed pin (14) and fixed pin (14) are fixed on fixed pin (14) and are fixed on fixed pin (14) to rotate, spacing support (1) is cuboid form block, spacing support (1) inner chamber is for locating cuboid form block middle part and opening square groove down, both ends all are equipped with the fixed orifices that are used for connecting locking bolt about spacing support (1), through-hole (15) that supply fixed pin (14) to penetrate are seted up on the front and back lateral wall of square groove corresponds, be equipped with the front and back and run through confession on rotating block (2) waist shape hole (16) that fixed pin (14) passed, rotating block (2) pass through waist shape hole (16) and fixed pin (14) realization with spacing support (1) pin joint, electro-magnet (6) with after permanent magnet (3) actuation locking or rejection unblock are accomplished, fixed pin (14) all with the upper edge of waist shape hole (16) supports tightly, slider (10) promotes left when rotating block (2) unblock by force.
  2. 2. The magnetic limiting unlocking assembly according to claim 1, wherein the permanent magnet (3) is fixed in a groove (12) formed in the top surface of the sliding block (10), the upper surface of the permanent magnet (3) is inclined in a left-high-right low-inclination manner and forms the bottom surface of the locking groove (11), and the right side groove wall of the locking groove (11) is provided with a slope surface (13) for interacting with the right lower corner of the rotating block (2).
  3. 3. The magnetic limiting unlocking assembly according to claim 1, wherein after the electromagnet (6) and the permanent magnet (3) repel and unlock, the rotating block (2) just rotates to a horizontal state, at this time, the balls (9) are pressed on the lowest point of the circular arc groove (7), the vertical central axis of the balls (9) is located on the left side of the vertical line where the long axis of the kidney-shaped hole (16) is located, and the distance between the vertical central axis and the long axis is 3-10mm.
  4. 4. The magnetic limiting unlocking assembly according to claim 1, wherein the top wall of the square groove is provided with a positioning column (17) protruding downwards, and the upper end of the force unloading spring (8) is sleeved on the positioning column (17) and is abutted against the top wall of the square groove.
  5. 5. The magnetic type limiting unlocking assembly according to claim 1, wherein two limiting convex strips (18) are arranged at the lower edge of the left side wall of the square groove at an upper and lower interval, the limiting groove (5) is formed between the two limiting convex strips (18), after the electromagnet (6) and the permanent magnet (3) are in attraction locking, the limiting end head (4) is abutted against the limiting convex strips (18) above, and after the electromagnet (6) and the permanent magnet (3) are in repulsion unlocking, the limiting end head (4) is abutted against the limiting convex strips (18) below.
  6. 6. The magnetic limiting unlocking assembly according to claim 1, wherein a blocking strip (19) protruding downwards is arranged on the lower surface of the right side of the cuboid block body, the blocking strip (19) stretches into a notch on the lower surface of a door closer sliding groove (20) and is adaptive to the width of the notch, and after the electromagnet (6) is in attraction locking with the permanent magnet (3), the right end of the sliding block (10) is just abutted to the left end face of the blocking strip (19).
  7. 7. A magnetic limiting unlocking assembly according to any one of claims 1 to 6, characterized in that the electromagnet (6) is a circular or rectangular sucker type electromagnet, and a control circuit board (21) electrically connected with the electromagnet (6) is further arranged in the limiting bracket (1).
  8. 8. The magnetic limiting unlocking assembly according to claim 7, wherein a mounting groove (22) with an opening downwards for the electromagnet (6) to be mounted is formed in the right side of the rotating block (2), a mounting groove (23) for the control circuit board (21) to be mounted is formed in the right side of the limiting support (1), and a wire passing hole (24) communicated with the mounting groove (23) is formed in the right side wall of an inner cavity of the limiting support (1).
  9. 9. An electric door closer comprising a magnetically attractable limit unlocking assembly according to any one of claims 1 to 8.

Description

Magnetic-type limiting unlocking component and electric door closer comprising same Technical Field The invention relates to the field of fireproof door closers, in particular to a magnetic limiting unlocking component and an electric door closer comprising the same. Background The electric door closer for the fireproof door is characterized in that the fireproof door is kept normally open in a daily state, and when a fire accident occurs, the fireproof door is closed through system control, a fire source is isolated, and fire and thick smoke are prevented from spreading to adjacent fireproof subareas. The electric door closer of the normally open fireproof door mainly has two working states. When a fire disaster alarm occurs, a communication module of the electric door closer of the fire door receives a door closing signal of a system host, so that the limit is invalid, the fire door is closed, and information is fed back to the system host after the fire door is closed in place. At present, the existing fire door electric door closer (such as a limit mechanism of a normally open door closer of CN215485401U and a limit locking and unlocking component of the door closer of CN 217872363U) in the market basically has at least one of the following problems that (1) the fire door is required to be continuously powered and kept limited in a normally open state, the power consumption is large, the system load is increased, the limit unlocking mechanism is complex, the material parts are more (comprising a connecting frame, a limit clamping hook, an electromagnet, a limit rotating block, a limit roller, a first spring, a push rod, a slide block, a clamping groove, a second spring, an extending part, a limit post, a first pin roll, a second pin roll, a third pin roll, a spring positioning post, a reset rod and the like), the cost is high, and (3) the fire door is required to be manually reset to enable the limit to be effective after being opened, and the mechanical automatic limit cannot be realized. Disclosure of Invention The invention aims to solve the technical problem of providing a magnetic limiting unlocking assembly and an electric door closer comprising the same, and aims to overcome the defects of the conventional electric door closer and the limiting unlocking mechanism thereof in the prior art. The magnetic type limiting unlocking component comprises a limiting support, a rotating block, a permanent magnet and a force unloading maintaining mechanism, wherein the rotating block is pivoted to an inner cavity of the limiting support through the middle part, a left-side lower part of the rotating block is provided with a left-protruding limiting end socket, the left wall of the inner cavity of the limiting support is provided with a limiting groove matched with the limiting end socket, an electromagnet is fixed on the right side of the rotating block, the top surface of the rotating block is provided with an arc groove, the force unloading maintaining mechanism comprises a force unloading spring and a ball, the force unloading spring is vertically arranged, the top end of the force unloading spring is abutted against the top wall of the inner cavity of the limiting support, the lower end of the force unloading spring compresses the ball in the arc groove, the permanent magnet is fixedly arranged on the top surface of a door closer, a locking groove matched with the right lower part of the rotating block is formed on the top surface of the sliding block, and when the electromagnet and the permanent magnet generate attraction or rejection action at the locking groove, the rotating block rotates around the middle part to correspond to the limiting locking or unlocking. On the basis of the technical scheme, the invention can be improved as follows. Further, the permanent magnet is fixed in a groove formed in the top surface of the sliding block, the upper surface of the permanent magnet is inclined in a left-high-right low-inclined mode and forms the bottom surface of the locking groove, and the wall of the right side groove of the locking groove is a slope surface for interacting with the lower right corner of the rotating block. Further, the spacing support is cuboid form block, spacing support inner chamber is for locating cuboid form block middle part and opening square groove down, both ends all are equipped with the fixed orifices that is used for connecting locking bolt about the spacing support, correspond on the front and back lateral wall of square groove and seted up the through-hole that supplies the fixed pin axle to penetrate, be equipped with the front and back on the rotating block and run through supplies the waist shape hole that the fixed pin axle passed, the rotating block pass through waist shape hole and fixed pin axle realize with spacing support pin joint, the electro-magnet with after permanent magnet actuation locking or rejection unblock are accomplished, the fixed pin axle all with