HK1141851B - Door lock - Google Patents

Description

Door lock

Technical Field

The invention relates to a door lock comprising a lock body equipped with a front plate, a bolt and an electric actuator. The bolt is movable in a reciprocating linear motion between a withdrawn position and a blocking position projecting from the lock body. An electric actuator is used to latch the deadbolt in the deadbolt position and release the deadbolt.

Background

Electrically controlled door locks typically use a solenoid to control a deadbolting means in the door lock to lock the bolt in the deadbolting position. In the locked bolt position, the bolt is pulled out; in other words, the bolt protrudes from the lock body. The solenoid is also used to release the deadbolting means from the deadbolting position, which allows the bolt to move into the lock body to the withdrawn position.

In prior art solutions, a solenoid is operatively engaged to a deadbolting piece, which can be moved so that it latches the bolt in the deadbolting position. In a typical device, the deadbolting piece is joined to the solenoid shaft, and a spring is used for arranging the shaft to be pressed outwards from the solenoid. The spring holds the deadbolting piece in the deadbolting position when the solenoid is de-energised and the solenoid tries to move the deadbolting piece out of the deadbolting position against the spring force when the solenoid is energised. The spring must be strong enough to hold the locking piece securely in the deadbolting position. This in turn means that the solenoid must be strong enough to be able to move the locking piece against the spring force. Another implementation is for the lock to latch in the deadbolted position with the deadbolting piece when the solenoid is energized. When the solenoid is de-energized, the deadbolt is released.

The lock body also usually has at least one mechanical control for controlling the position of the locking piece. For example, the cylinder is arranged to control the locking piece, which means that the locking of the door can be opened using a key. The lock body may also have an auxiliary bolt that protrudes from the lock body when the door is not against the frame of the doorway. The protruding auxiliary bolt prevents the deadbolting means from moving into the deadbolting position, which enables to turn the door to the closed position. The spring is connected to the auxiliary bolt and attempts to push the auxiliary bolt out of the lock body. An auxiliary bolt is engaged to the locking piece. In an apparatus in which the door is latched when the solenoid is energized, the auxiliary bolt and its spring resist the force of the energized solenoid when the auxiliary bolt is withdrawn. This occurs when the door is open and electrical control of the solenoid attempts to lock the lock. Accordingly, when the lock is opened with a key, the mechanical portion of the cylinder engaged to the locking piece opposes the force of the energized solenoid. Thus, the solenoid must be strong enough to operate according to design, regardless of the load of the mechanical controller. On the other hand, the solenoid must not be too strong for key operation to be comfortable.

The problem is thus that the different ways of controlling the deadbolting means in the lock may interfere with each other in certain everyday operating situations. Another problem is that the lock must be manufactured separately for certain devices. This increases the number of different parts in terms of manufacturing and stock.

Disclosure of Invention

The object of the present invention is to reduce the disadvantages of the above-mentioned problems. This object is achieved as described in the independent claims. The dependent claims describe various embodiments of the invention.

In an embodiment according to the invention the deadbolting means of the lock comprise a locking piece 15 to establish and release the locking of the deadbolting means in the deadbolting position. The locking piece is pivotably supported on the lock body 3 and comprises a mechanical control part 19 and at least one electrical control part 20A, 20B.

The mechanical control portion is operably coupled to a mechanical control such as an auxiliary bolt or cylinder. The electrical control portion is operably coupled to, for example, an electric motor, a solenoid, a piezoelectric motor, or a controllable small metal actuator. The locking piece is arranged such that when mechanical control is used, the locking piece will rotate relative to the lock body without resistance from a motor, energized solenoid or other electrical actuator operably engaged to the electrical control portion.

Drawings

The invention is described in more detail hereinafter with reference to the accompanying drawings, in which

Figure 1 shows an example of a lock according to the invention,

figure 2 shows an example of a lock according to the invention seen from the front of the front cover,

fig. 3 shows an example of a lock according to the invention, the bolt being in the lock body,

figure 4 shows the deadbolting means of the lock,

figures 5A-5C illustrate a deadbolting piece according to the invention,

FIG. 6 shows the interoperation of the locking piece and the shaft element in the safety mode, an

Fig. 7 shows the interoperation of the locking piece and the shaft member in the protection mode.

Detailed Description

Fig. 1 shows an example of a door lock 1 according to the invention. The door lock includes: a lock body 3 to which the front plate 2 is fitted; the lock body has a dual-action bolt 4 which is movable in reciprocating linear movement between a withdrawn position and a locking position protruding from the lock body through a bolt opening 5 (fig. 2) in the front housing 2. The bolt 4 is spring loaded towards the protruding position. The door lock 1 further comprises a deadbolting means 8, the deadbolting means 8 being movable to a deadbolting position in which the deadbolting means 8 prevents the double acting bolt from moving from the protruding position to the withdrawn position in the lock body 3. The lock of this embodiment further comprises a solenoid 9, the solenoid 9 being used to control the deadbolting means 8.

The door lock also typically includes other controls for controlling the deadbolting means. The lock may have an auxiliary bolt 16 and/or a control spindle arrangement 17. The auxiliary bolt prevents the bolt from moving into lock when the door is open, but allows the bolt to move into lock when the door is closed. The control spindle means 17 comprise, for example, a cylinder, a handle and/or a knob. The connections in the deadbolting from the control spindle means and the auxiliary bolt to the locking piece 15 are simply marked with dashed lines. Thus in the embodiment of fig. 1 the locking piece can be controlled with the solenoid 9, the auxiliary bolt 16 and the control spindle means.

Fig. 2 shows an embodiment of the lock according to the invention seen from the front side of the front plate. It can be seen from the figures that in this embodiment the edge of the bolt opening 5 has a projection 18, which projection 18 is required for the bolt piece 7 used in the embodiment. Other types of double acting latches may of course be used in the lock according to the invention.

The deadbolting means comprise a wedge 10 between the body part 6 of the bolt and the lock body 3. The wedge is arranged to move transversely to the linear path of the bolt. The deadbolting means also comprise a locking piece 15 and a rod 11 comprising a support point 12, a support surface 13 and a locking surface 14. The lever 11 is pivotably supported on the lock body 3 at a support point 12. The support surface 13 is arranged to cooperate with the wedge 10. The support surface 13 and the blocking surface 14 are rotatable with the lever relative to the support point 12 between an outward rotated position of the lever towards the front plate and an inward rotated position towards the rear edge of the lock body. The lever 11 is spring loaded towards the outward turning position. The locking piece 15 can be moved against the locking surface 14 to lock the rod and wedge in the deadbolting position, in which the rod 11 is in the outward turning position and the support surface 13 abuts the wedge 10, which is wedged between the bolt body 6 and the lock body 3.

Figure 1 shows the lock with bolt 4 out and deadbolting means 8 in the deadbolted state. In fig. 3, the bolt is fully in the lock body, in other words, in the withdrawn position. In fig. 3 the deadbolting piece 15 is driven to the open position, in which it does not prevent the other deadbolting parts from moving into the withdrawn position.

The deadbolting piece 15 receives control from the solenoid 9, wedge and control spindle arrangement in the example of fig. 1. For mechanical control purposes, the deadbolting piece has a mechanical control part 19 (fig. 5A) to which the auxiliary bolt and the control spindle means are operatively engaged. The locking piece has at least one electrical control part 20A, 20B for electrical control purposes, in this case solenoid control. The deadbolting piece 15 is pivotally supported on the lock body 3. The deadbolting piece rotates in relation to the support so that it does not prevent the other parts of the deadbolting means from moving to the withdrawn position when it receives control from the auxiliary bolt 16 or the control spindle means 17 engaged to the mechanical control part. When control is stopped, the spring returns the deadbolting piece to the deadbolting position.

Fig. 5A-5C show an embodiment of the deadbolting piece 15. The locking piece comprises a surface 21 to form a locking surface that can be arranged to lock the deadbolting means in the deadbolting position. In this embodiment, the surface is a circular surface, but may also be a flat surface. The normal to the circular surface is preferably parallel to the radius of the axis formed by the support of the locking piece. The locking piece in the figure is a roller that pivots relative to the lock body support. The locking piece can also be shaped differently from the roller, for example a bar which is pivotably supported on the lock body. The mechanical control part 19 is a protrusion at the edge of the locking piece, but may also be a groove. This embodiment has two electrical control parts 20A, 20B which are slots. The deadbolting piece also has a spring attachment point 22 for attaching a first spring 30, which first spring 30 tries to turn the deadbolting piece towards the deadbolting position.

The deadbolting piece can also be controlled using a solenoid or other electric actuator. Fig. 6 and 7 illustrate the operation of the electric actuator control. In the embodiment of these figures, the deadbolting piece is pivotally bearing-mounted on the lock body by means of a pin 23 and a sliding ring 24. The shaft element 26 is attached to the shaft 25 of a solenoid/other electrical actuator (e.g., fig. 3 and 4). The shaft is partly located in the solenoid/other electric actuator 9 and is linearly movable in the axial direction. When an energized solenoid or other electrical actuator pulls the shaft inward, the shaft element also moves toward the solenoid. When the solenoid/other electric actuator is de-energized, the shaft and shaft member 26 are moved away from the solenoid by the force of a spring disposed in the lock body.

The shaft member of the embodiment in fig. 6 and 7 comprises two arms 27, 28, and the shaft member 26 is operatively engaged from either arm to the electrically controlled portion 20A, 20B of the locking piece 15. The support for the locking piece is held between the arms. In the embodiment shown in the figures, the arms of the shaft element are joined to form a ring, inside which the support for the locking piece is located. However, it is not necessary to join the arms in this manner. The electrically controlled parts 20A, 20B of the locking piece are slots. The arms of the shaft element comprise projections 29A, 29B, which projections 29A, 29B can be arranged in operative connection with the edges of the slots 20A, 20B.

In the embodiment shown in the figures, the projection is a screw that can be turned to form the projection and create an operative connection with the edge of the slot. However, for example, a cylindrical pin may be used instead of the screw. Both arms 27, 28 have arm-specific screws/pins and the locking piece has screw-specific control grooves or electrical control portions for the screws/pins. The locking piece can be turned by means of an electric control part controlled by a shaft element-i.e. the shaft element is controlled by a solenoid or other electric actuator.

The connection to either locking piece control portion formed by the shaft element control can be selected by turning either screw to form the protruding portion while the other does not. Fig. 6 shows that a so-called safety mode is selected, in which the screw is connected with the second locking plate groove 20A. In this example, the latching operation is arranged to place the lock in the deadbolted state when the solenoid is energised. So that the shaft member has been pulled towards the solenoid/other electric actuator in the direction indicated by the straight dashed line, the locking piece is spring loaded to turn in the direction indicated by the curved dashed line. The locking piece is now in the locked position. When the solenoid is de-energized, the second spring 31 pushes the solenoid shaft 25 and the shaft element 26 away from the solenoid in the direction of the straight solid line. In this example, the screw in the arm turns the locking piece in the direction of the curved solid line away from the deadbolting position. This situation is illustrated in fig. 4.

Fig. 7 shows that a so-called protection mode is selected, in which the screw is connected to the first locking plate groove 20B. In this example, the lock operation is arranged such that when the solenoid is de-energised, the lock is in the deadbolted state. The shaft element is thus pulled by the first spring 30, being pushed away from the solenoid in the direction indicated by the straight dashed line, and the locking piece is spring-loaded to turn in the direction indicated by the curved dashed line. The locking piece is now in the locked position. This is shown in figure 1. When the solenoid/other actuator is energized, the solenoid pulls the shaft 25 and shaft element 26 in a straight, solid line direction towards the solenoid. The screw in the arm in this example turns the locking piece in the direction of the curved solid line, away from the deadbolting position. When the solenoid is de-energized, the first spring 30 returns the deadbolting piece to the deadbolting position. The rotating deadbolting piece pulls both the solenoid shaft and the shaft element away from the solenoid.

As can be seen in fig. 4, the lock body should preferably have a limit pin 32, which limit pin 32 prevents the second spring from pushing against the striker member 26 in the protecting mode of operation (fig. 1). The same lock can thus be set to either a secure mode or a protected mode. The lock body also has mounting holes 33 for the turning screws 29A and 29B. In the lock according to the invention the mechanical controls 16, 17 do not interfere with the energized electric actuator and the operation of the deadbolting means is protected.

In the above described embodiments the protruding part is in the shaft element and the slot is in the locking piece, but it is also feasible that the electrically controlled part 20A, 20B of the locking piece is a protruding part and the arm of the shaft element 26 comprises a slot, while the protruding part can be arranged in operative connection with the edge of the slot.

Even though the above description mainly refers to the use of a solenoid as an electric actuator, the lock according to the invention may use an electric motor, a piezo motor or a small metal actuator to control the shaft element 26. The small metal actuator can be, for example, a so-called MSM (magnetically controlled shape memory alloy) device based on a controlled magnetic field. The magnetic field can be controlled electrically. The deadbolting means described above are only one embodiment. The deadbolting means 8 can thus be implemented in different ways from the above description. The implementation of the deadbolting means is influenced by the type of bolt used and by other structures of the lock.

As can be noted, embodiments according to the invention can be implemented by means of a number of different solutions. It is thus clear that the invention is not limited to the examples presented herein. So that any inventive embodiment can be implemented within the scope of the inventive idea of the present invention.

Claims (15)

1. A door lock, comprising: a lock body (3) equipped with a front plate (2); the lock body has a double-acting bolt (4) which is movable in a reciprocating linear movement between a withdrawn position and a locking position protruding from the lock body through a bolt opening (5) in the front plate (2), towards which protruding locking position the bolt is spring-loaded, the door lock further comprises a deadbolting means (8), the deadbolting means (8) being movable to a deadbolting position in which it prevents the double-acting bolt from moving from the protruding locking position to the withdrawn position in the lock body (3), and an electric actuator (9) and a mechanical control (16, 17) are both used to control the deadbolting means,

characterized in that the deadbolting means comprise a locking piece (15) to establish and release the locking of the deadbolting means in the deadbolting position, said locking piece being pivotably supported on the lock body (3) and comprising a mechanical control part (19) and at least one electrical control part (20A, 20B),

a mechanical control part (19) is operatively connected to the mechanical control (16, 17), an electrical control part is operatively connected to the electrical actuator, the locking piece (15) is arranged such that when the mechanical control is used, a rotation of the locking piece relative to the lock body occurs without resistance from an energized electrical actuator operatively connected to the electrical control part (20A, 20B).

2. Door lock according to claim 1, characterized in that the electric actuator (9) comprises a shaft (25) which is partly located in the electric actuator and which is linearly movable in the axial direction, the door lock comprising a shaft element (26) connected to the shaft, which shaft element comprises two arms (27, 28), which shaft element is operatively connected from one of the two arms to the electric control part (20A, 20B) of the locking piece, and the support for the locking piece (15) is held between the arms (27, 28).

3. A door lock according to claim 2, characterized in that the electric control part (20A, 20B) is a slot and in that the arm of the shaft element comprises a projection (29A, 29B), which projection (29A, 29B) can be arranged in operative connection with the edge of the slot.

4. A door lock according to claim 2, characterized in that the electric control part (29A, 29B) is a protruding part and in that the arm of the shaft element (26) comprises a slot, said protruding part being arrangeable in operative connection with an edge of the slot.

5. A door lock according to claim 3, characterized in that the protruding part is a screw (29A, 29B) or a cylinder pin which can be turned to form the protruding part and to create said operative connection with the edge of the slot, and in that both arms have a specific screw/cylinder pin, the locking piece having a first control slot (20B) and a second control slot (20A) for the screw/cylinder pin, the locking piece being able to be controlled in turning by means of the control slots (20A, 20B) of either locking piece using a shaft element,

the connection from the shaft element control to either locking piece control slot can be selected by turning either screw/cylinder to form a projection while the other screw/cylinder does not.

6. A door lock according to claim 5, characterized in that, with the connection selected for the first control slot (20B), the energized electric actuator (9) is arranged to release the blocking of the deadbolting means formed by the blocking piece (15) in the deadbolting position,

and in that, with the connection selected for the second control slot (20A), the de-energized state of the electric actuator is arranged to release the blocking of the deadbolting means formed by the blocking piece (15) in the deadbolting position.

7. A door lock according to claim 6, characterized in that the door lock, which has selected the second control slot (20A), comprises a second spring (31) arranged to push the shaft (25) and the shaft element (26) of the electric actuator away from the electric actuator (9).

8. A door lock according to any one of claims 1 to 7, characterized in that the door lock comprises a first spring (30), the first spring (30) being connected to the lock body (3) and the locking piece (15) and being arranged to turn the locking piece towards its locking position relative to its support.

9. A door lock according to claim 8, characterized in that the locking piece (15) comprises a rounded surface (21) to form a locking surface, which can be arranged to lock the deadbolting means in the deadbolting position, the normal of said rounded surface being parallel to the radius of the axis formed by the support of the locking piece.

10. Door lock according to claim 9, characterized in that the locking piece (15) is a roller which pivots relative to the support.

11. Door lock according to one of claims 2 to 7, characterized in that the arms (27, 28) of the shaft element join to form a ring, inside which the support for the locking piece is located.

12. A door lock according to any one of claims 1 to 7, characterized in that the mechanical control (16, 17) is an auxiliary bolt or cylinder of the lock body.

13. A door lock according to any one of claims 1 to 7, characterized in that the mechanical control part (19) is a slot or a projection.

14. A door lock according to any one of claims 1 to 7, characterized in that the electric actuator (9) is a solenoid, a motor or a small metal actuator.

15. A door lock according to any one of claims 1 to 7, characterized in that the electric actuator (9) is a piezoelectric motor.