Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/0046—Electric or magnetic means in the striker or on the frame; Operating or controlling the striker plate
  • E05B47/0047—Striker rotating about an axis parallel to the wing edge
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/06—Controlling mechanically-operated bolts by electro-magnetically-operated detents
  • E05B47/0696—Controlling mechanically-operated bolts by electro-magnetically-operated detents locking the bolt by an electromagnet in the striker
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
  • E05B47/0002—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with electromagnets
  • E05B47/0003—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with electromagnets having a movable core
  • E05B47/0004—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with electromagnets having a movable core said core being linearly movable
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
  • E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors

Definitions

• the part of a door's open and close mechanism that is positioned in the door frame is called a door strike.
• This is traditionally shaped as a rigid metal bracket with one or more holes, shaped so that a latch bolt or a dead bolt attached to the door blade can be inserted into them. Since such door strikes do not include any moving parts, the opening mechanism is limited to reside in the door blade itself.
• This mechanism consists, for example, of a door handle mechanically connected with a latch bolt, or a door knob or a key attached to a bolt.
• the general embodiment of the invention comprises an electrical door strike which can be manufactured compactly and inexpensively and whose locking mechanism can be released even when the door it is mounted to is put under pressure.
• the door strike comprises a door strike house, a movable strike keeper which rotates in a movement space about an axis substantially parallel to the longitudinal direction of the door strike and a locking mechanism for the strike keeper.
• the door strike locking mechanism itself is characterized in that it comprises a barrel in the door strike house, a first movable member, a second rotatable member and a rotational mechanism for rotating the second member.
• the barrel in the door strike house has a central axis which is substantially parallel to the axis of rotation of the strike keeper, and that it has an opening adjacent the movement space of the strike keeper.
• the first movable member is placed in the barrel near this opening, while the second member is placed further away from the movement space of the strike keeper than the first member, in a position where it intersects the central axis of the barrel.
• the first member is shaped like a ball with radius r, while the second member is characterized as being rotatable.
• the axis of rotation of the second member is normally on and intersects the central axis of the barrel in a point a which lies in a distance i from the said opening of the barrel.
• the second the member is shaped such that it has an extent in the radial direction from its axis of rotation (i.e. along the central axis of the barrel) which varies gradually with its angle of rotation ⁇ .
• x is smaller or equal to t at a rotation angle &2 and greater than / at a different angle of rotation ⁇ . Consequently, the ball will be forced to stay in a position where it protrudes from the Opening of the barrel when the second portion has a rotation equal to 81, while being free to be completely within the barrel at a rotation &2.
• the strike keeper and thus the door strike are locked in a closed state for a rotation ⁇ , while the strike keeper is open (free to move) at a rotation &2.
• Figure 1 shows a principle drawing of the door strike.
• Figure 2 shows a principle diagram of the door strike locking mechanism.
• Figure 3 shows a principle diagram of an embodiment of the said rotatable member.
• the invention includes a new type of electrical door strike 1 having an opening mechanism which can be easily released even when under pressure.
• the barrel is formed in the door strike house itself, with a central axis 13 running parallel to the axis of rotation of the strike keeper, and with an opening 9 which is adjacent the movement space of the strike keeper.
• the first movable member 10 is located inside this barrel, close to the said opening, and is shaped like a ball with radius r.
• the barrel must be shaped so that the center of the ball follows approximately the central axis of the barrel.
• the second member is positioned so that its axis of rotation 16 is at a right angle to and crosses the central axis 13 of the barrel, at the same time as the member 11 itself intercepts the central axis of the barrel.
• the intersection between the two axes is defined as point a and lies at a distance I from the said opening, as shown in FIG. 2b.
• the axis of rotation of the second member will preferably also be at a right angle to the plane of the door blade.
• the second member has a radial extent 19 from its axis of rotation which varies gradually with its angle of rotation Q. Because this member is positioned such that its axis of rotation crosses othogonally the central axis of the barrel, so its extent along the central axis of the barrel will also vary gradually with Q.
• the angle of rotation & can therefore determine the position of the first member along the central axis of the barrel.
• the second member is shaped such that x is smaller or equal to / at an angle of rotation & 1 (Fig. 2a), and greater than I at a second angle of rotation &2 (Fig. 2b).
• a rotation angle &2 will cause the strike keeper to move freely and the door strike is in the open position, while a rotation angle ⁇ will cause the strike keeper, and consequently the door strike, to be locked.
• the locking mechanism is closed and opened by controlling the rotation angle &, and according to the said description can be in two states:
• the second member In order to open the door strike, the second member is rotated from an angle til ⁇ to an angle ⁇ 2, making it fit inside the barrel for the ball to be pushed into it. Any pressure on the strike keeper will mainly help push the ball into this barrel instead of providing large amounts of unwanted friction in the locking mechanism.
• the force of the strike keeper against the ball surface will also help to provide a rotation of the ball itself in which the lock is opened. Therefore, since the ball rests against the rotatable portion, it is desirable that the direction of rotation required by the second member is oppositely directed than the direction in which the ball rotates upon opening. In this way, the pressure (from the strike keeper on to the ball) helps to reduce the force required to open the lock.
• both the inward pressure against the rotatable member and the rotational force on the ball are affected by how far out in the strike keeper's movement space the ball is in the locking position.
• a functioning balance of these variables will be that between 2/3 and 4/5 of the radius of the ball protrudes into the movement space of the strike keeper.
• the edge of the strike keeper that go against the ball should be rounded with a convex surface with a radius between 1/4 and 1/10 of the radius of the ball.
• either the barrel can be formed with a constriction 28 against the movement space of the strike keeper or the strike keeper can be arranged so that it constantly blocks for members of the barrel's mentioned opening.
• the design of the rotatable member is important. (For example, this can be done by designing the surface of the rotatable member so that the ball can rest on this surface rather than wanting to slide over it).
• the rotatable member comprises a spherical recess 28 with radius r facing the first movable portion at an angle of rotation &2.
• the rotable member may in this embodiment have a cylindrical half 29 with radius r and a cylindrical side sector 30 on either side of the recess with radius r / 2,
• the cylindrical half has a flat sector 31 which spans 1 to 5 degrees adjacent to a side sector (30) at the angle of rotation 01.
• Locking mechanisms for door strikes will in many applications be opened and closed countless times a day and must therefore be able to withstand wear without the functionality of the locking mechanism failing.
• the wear itself will mainly pass on the points subjected to strong forces, and in the mentioned invention this is typically at the point of contact between the ball and the barrel, the strike keeper and the ball, as weli as between the bail and the rotatable member.
• the barrel will be shaped as a cylinder with a radius of the order of 5% greater than r. Pressure from the ball towards the barrel will then be distributed on the interior surface.
• the angular distance between 01 and 02 is between 60 and 120 degrees, more preferably about 90 degrees.
• the rotary plate 33 is directly or indirectly rotationally locked to an end 39 of the rotatable member and shaped with two rounded teeth 40 having a U-shaped recess 41 therebetween, as well as a first 42 and a second 43 sector stop.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Closing And Opening Devices For Wings, And Checks For Wings (AREA)
• Installation Of Indoor Wiring (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)
• Insulators (AREA)
• Discharge Heating (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=65628808

Family Applications (1)

Country Status (3)

Cited By (1)

Citations (2)

Family Cites Families (2)

• 2018
  • 2018-01-22 NO NO20180101A patent/NO344518B1/no not_active IP Right Cessation
• 2019
  • 2019-01-22 EP EP19708367.8A patent/EP3743578B1/de active Active
  • 2019-01-22 WO PCT/NO2019/000002 patent/WO2019143252A1/en unknown

Patent Citations (2)

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