Knob and key actuated double cylinder lock

Abstract

ASSA ABLOY Technology Ltd, a company in the ASSA ABLOY group, has developed a double cylinder lock (10) comprising a key operated cylinder housing (12), a turn button cylinder housing (16) having a turn button mechanism (18), and a rotatable cam (30). A blocking element (40) is initially in a blocking position relative to the cam (30) preventing rotation of the cam (30). The turn button mechanism (18) comprises a turn button (20) coupled to a rotation transmission member (22) which is coupled to a cam tumbler element (24) arranged to turn the cam (30). The rotation transmission member (22) is coupled to the blocking element (40). Rotation of the turn button (20) causes movement of the rotation transmission member (22) which causes the blocking element (40) to move out of the blocking position and enable rotation of the cam (30) by rotation of the turn button (20).

Description

Technical Field

[0001] The present invention relates generally to barrel locks, and particularly to a double barrel lock actuated by a key on the outside and by a knob on the inside. Background Technology

[0002] Double-cylinder locks are well-known for locking and unlocking doors or windows from opposite sides. These locks, typically manufactured with European standard cylinders, usually consist of two detachably actuated, axially aligned cylinders, each connected to a cam located in the gap between the cylinders.

[0003] In some double-cylinder locks, the outer cylinder includes a locking mechanism with a rotatable cylinder and a series of pins, discs, or other bolts. Turning the rotatable cylinder by inserting a suitable key allows the locking mechanism to be brought to the shear line. The inner cylinder has no pins or other locking elements; instead, it is rotated by a knob (the term "knob" encompasses a knob, thumb turn, or other suitable mechanism).

[0004] In existing cylinders, the cam can rotate freely with the knob cylinder. An unauthorized object inserted into the key slot on the key actuation side may prevent the knob cylinder from rotating. Summary of the Invention

[0005] The present invention seeks to provide an improved and novel double-cylinder lock that is actuated by a key on the outside and by a knob on the inside, as described in more detail below.

[0006] The double-cylinder lock of the present invention has a cam that can be initially prevented from rotating by means of a blocking element. Rotating an authorized key inserted into the key slot on the key side of the double-cylinder lock will rotate the cam to operate the lock. Turning the knob without additional action (e.g., without pushing or pulling the knob) will pass over the blocking element and rotate the cam to operate the lock.

[0007] In another aspect of the invention, even if an unauthorized object is inserted into the key slot on the key side of the double-cylinder lock, turning the knob will pass over the unauthorized object and rotate the cam to operate the lock without requiring additional action (e.g., without needing to push or pull the knob).

[0008] Therefore, according to a non-limiting embodiment of the present invention, a double-cylinder lock is provided, comprising: a key-operated cylinder housing in which a key-operated lock cylinder having a key slot is provided; a knob cylinder housing in which a knob mechanism is provided; a rotatable cam located between the key-operated cylinder housing and the knob cylinder housing; and a blocking element initially in a blocking position relative to the cam, the blocking position preventing rotation of the cam, wherein the knob mechanism includes a knob coupled to a rotation transmission member coupled to a cam thrower element arranged to rotate the cam, and wherein the rotation transmission member is coupled to the blocking element such that rotation of the knob causes movement (e.g., rotation) of the rotation transmission member, the movement of the rotation transmission member causing the blocking element to move out of the blocking position relative to the cam and enabling rotation of the cam to be achieved by rotation of the knob.

[0009] According to a non-limiting embodiment of the invention, the rotary transmission member is coupled to the key push element, and rotation of the knob causes movement of the rotary transmission member, which in turn causes movement of the key push element toward the key operating cylinder housing.

[0010] According to a non-limiting embodiment of the invention, the rotational transmission member is coupled to the blocking element by means of a pusher element, the pusher element being arranged adjacent to and abutting the blocking element.

[0011] According to a non-limiting embodiment of the invention, the rotational transmission member is connected to the key actuating element by means of a pusher element with a hole formed therein, and the key actuating element is disposed in the hole.

[0012] According to a non-limiting embodiment of the invention, the rotary transmission member includes an inclined surface, on which a pin rests, and the pin is fixed to the pusher element.

[0013] According to a non-limiting embodiment of the invention, the pin is guided to translate along a guide groove formed in the cam thrower element.

[0014] According to a non-limiting embodiment of the invention, the key actuating element is biased by a biasing device.

[0015] According to a non-limiting embodiment of the present invention, in the blocking position, the blocking portion is located between the cam and the key operation cylinder housing. Attached Figure Description

[0016] The invention will be more fully understood and appreciated from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 This is a simplified illustration of a double-cylinder lock constructed and operated according to a non-limiting embodiment of the present invention.

[0018] Figure 2 and Figure 2A They are Figure 1 A simplified side view and sectional view of a double-cylinder lock (before the knob has been turned and the key is not inserted in the key-operated side), where the blocking element initially blocks the rotation of the cam, where Figure 2A It is along Figure 2 The line AA in the middle is cut off;

[0019] Figure 3 and Figure 3A They are Figure 1 A simplified side and sectional view of a double-cylinder lock, wherein the knob is turned and no key is inserted in the key-operated side, thereby removing the blocking element to allow rotation of the cam, wherein Figure 3A It is along Figure 3 The line AA in the middle is cut off;

[0020] Figure 4 and Figure 4A They are Figure 1 A simplified side and sectional view of a double-cylinder lock (with an unauthorized object inserted in the key-operated side before the knob has been turned). The double-cylinder lock initially blocks the rotation of the cam by initially holding the blocking element in the blocking position, where... Figure 4A It is along Figure 4 The line AA in the middle is cut off;

[0021] Figure 5 and Figure 5A They are Figure 1 A simplified side and sectional view of a double-cylinder lock, wherein a knob is turned to remove unauthorized objects and obstructing elements, making rotation of the cam possible, wherein... Figure 5A It is along Figure 5 The line AA in the middle is cut off; and

[0022] Figure 6A , Figure 6B and Figure 6C This is a simplified diagram of a rotary transmission component that enables the rotation of a knob to move a blocking element and / or any unauthorized object. Figure 6A , Figure 6B and Figure 6CThe diagram shows three positions of the rotary transmission member: from the position where the blocking element has never been moved out of the blocking position (the pin has not yet been moved by the rotary transmission member and is furthest away from the cam), to the position where the pin begins to move sequentially to cause the movement of the blocking element, and to the pin position where the blocking element is completely moved out of the blocking position (the pin moved by the rotary transmission member is closest to the cam). Detailed Implementation

[0023] Now refer to Figure 1 The illustration shows a double-cylinder lock 10 constructed and operated according to a non-limiting embodiment of the invention.

[0024] The lock 10 includes a key operating cylinder housing 12, in which a key operating lock cylinder 14 with a key slot 15 is provided. The lock 10 also includes a knob cylinder housing 16, in which a knob mechanism 18 is provided.

[0025] The knob mechanism 18 may include a knob 20, which is coupled to a rotation transmission member 22 (e.g., by means of a locating screw or other fastener 23, or by being integrally formed with the rotation transmission member 22). The rotation transmission member 22 is coupled to a cam thrower element 24, such as, but not necessarily by means of, one or more bearing elements 26 (e.g., ball bearings), which protrude through holes 27 formed in the cam thrower element 24 and support against the inner circumference of the knob housing 16 (e.g., ...). Figure 2A (As shown in the illustration). The cam thrower element 24 includes a stop 28 that allows the cam 30 to be rotated by abutting against a recess 32 formed in the cam 30. In the illustrated embodiment, a rotation transmission member 22 is provided in the cam thrower element 24, but this is not necessary for implementing the invention.

[0026] The rotational transmission member 22 moves when the knob 20 is rotated. In the illustrated embodiment, the rotational transmission member 22 rotates when the knob 20 is rotated. Alternatively, the rotational transmission member 22 may be arranged to translate when the knob 20 is rotated.

[0027] In the illustrated embodiment, the rotational transmission member 22 includes an inclined surface 34 (which may be curved), on which a pin 36 rests. The pin 36 can be secured to the actuator element 38, such as by passing through an aperture 39 formed in the actuator element 38 (e.g., press-fit). The pin 36 can be constrained or guided to translate along a guide groove 37 formed in the cam thrower element 24. The actuator element 38 may have a central hole 35. Note that in the illustrated embodiment, the rotation of the rotational transmission member 22 is converted into linear motion of the actuator element 38. This can alternatively be achieved via threaded mechanisms and other mechanisms.

[0028] The pusher element 38 may be arranged adjacent to and abutting against the blocking element 40, which has a blocking portion 42, such as, but not limited to, a lug 42. Alternatively, the pusher element 38 may be part of the blocking element 40.

[0029] The key actuating element 44 can be disposed in the hole 35 of the actuating element 38. The key actuating element 44 can be biased by a biasing device 46 (such as a coil spring).

[0030] The cam thrower element 24 can be held to rotate in the knob cylinder housing 16 by means of the elastic retaining rings 45 and 47 respectively, and the rotatable lock cylinder 14 can be held to rotate in the key operating cylinder housing 12.

[0031] Now refer to Figure 2 and Figure 2A This shows a double-cylinder lock 10 before the knob 20 has been turned and no key is inserted in the key-operated side. Figure 2A As can be seen, the blocking portion 42 of the blocking element 40 initially blocks the rotation of the cam 30 because the blocking portion 42 is located between the cam 30 and the key operation cylinder housing 12 (straddling the cam 30 and the key operation cylinder housing 12). This is referred to as the blocking position because in this position the cam 30 is prevented from rotating by the blocking element 40. This is the initial position of the lock 10.

[0032] Now refer to Figure 3 and Figure 3A It shows a double-cylinder lock 10, in which the knob 20 is turned and no key is inserted in the key-operated side. Figure 3A As can be seen, rotating the knob 20 causes the pin 36 of the pusher element 38 to slide or move along the inclined surface 34 of the rotation transmission member 22, so that the pin 36 moves linearly toward the cam 30 in the guide groove 37. This movement of the pin 36 causes the pusher element 38 to push against the blocking element 40, so that the blocking portion 42 of the blocking element 40 moves further away from the cam 30 into the key operation cylinder housing 12. The blocking portion 42 of the blocking element 40 is now pushed out of the blocking position, so that the cam 30 can be rotated by rotating the knob 20.

[0033] Therefore, the present invention solves one of the problems of the prior art: the blocking element 40 prevents the cam 30 from being turned by a prying tool that bypasses the key-operated lock cylinder, but allows the cam 30 to be actuated by a person inside the room turning the knob 20.

[0034] The movement of pin 36 along inclined surface 34 can Figure 6A , Figure 6B and Figure 6C Seen in the middle, Figure 6A , Figure 6B and Figure 6C Three positions of the rotational transmission member 22 are shown. Figure 6A Showing the exit cam ( Figure 6A (Not shown in the image) The furthest pin is 36. This is where the blocking element has not been moved out. Figure 2A The location of the obstruction point. Figure 6B It shows the starting movement of the blocking element ( Figure 6B Pin 36 (not shown in the image) is located in the position shown in the image. Figure 6C It shows that it was moved away from the cam ( Figure 6C (Not shown in the image) The most recent pin 36 is... Figure 3A The position in which the blocking element is completely removed from the blocking position.

[0035] Note that inserting the authorized key into the keyside of lock 10 will bring the cylinder lock to the shear line, and turning the key will cause the lock cylinder to rotate. The blocking element and cam will rotate with the lock cylinder. Therefore, turning the authorized key inserted into the key slot on the keyside of the double cylinder lock 10 will rotate the cam to operate lock 10.

[0036] Now refer to Figure 4 and Figure 4A This illustrates a double cylinder lock 10 with an unauthorized object 50 inserted into the key-operated side before the knob 20 has been turned. The term "unauthorized object" includes any object that does not bring the cylinder lock to the shear line, such as, but not limited to, a key or any foreign object. As... Figure 2A As shown, the blocking portion 42 of the blocking element 40 blocks the rotation of the cam 30 because the blocking portion 42 is located between the cam 30 and the key operating cylinder housing 12. It is also observed that the insertion of the unauthorized object 50 further pushes the key pushing element 44 into the hole 35 of the pusher element 38, which compresses the biasing device 46. In this position, the cam 30 is prevented from rotating.

[0037] Now refer to Figure 5 and Figure 5A It shows the double-cylinder lock 10 with the knob 20 turned. Figure 5A As can be seen, rotating the knob 20 causes the pin 36 of the pusher element 38 to slide or move along the inclined surface 34 of the rotation transmission member 22, so that the pin 36 moves linearly toward the cam 30 in the guide groove 37. This movement of the pin 36 causes the pusher element 38 to push against the blocking element 40, so that the blocking portion 42 of the blocking element 40 moves further away from the cam 30 and into the key operating cylinder housing 12. In addition, the pusher element 38 pushes against the key pushing element 44, which causes the key pushing element 44 to push against the unauthorized object 50 and further remove the unauthorized object 50 from the key operating cylinder housing 12. The blocking portion 42 of the blocking element 40 has now been pushed out of the blocking position, so that the rotation of the cam 30 can be achieved by rotating the knob 20.

[0038] Therefore, the present invention solves one of the defects of the prior art: even if an unauthorized person inserts an unauthorized object 50 into the key slot on the key actuation side, the rotation of the knob 20 causes the key pushing element 44 to further remove the unauthorized object 50 from the key operation cylinder housing 12, and the cam 30 can be rotated by the knob 20.

Claims

1. A double-cylinder lock (10), comprising: A key operation cylinder housing (12) is provided in which a key operation lock cylinder (14) with a key slot (15) is provided; A knob housing (16) is provided with a knob mechanism (18); A rotatable cam (30) located between the key operation cylinder housing (12) and the knob cylinder housing (16); and A blocking element (40) is initially in a blocking position relative to the cam (30), the blocking position preventing rotation of the cam (30); The knob mechanism (18) includes a knob (20) connected to a rotation transmission member (22), which is connected to a cam thrower element (24) arranged to rotate the cam (30). The rotation transmission member (22) is connected to a blocking element (40) such that rotation of the knob (20) causes movement of the rotation transmission member (22), which causes the blocking element (40) to move out of the blocking position and allows rotation of the cam (30) to be achieved by rotation of the knob (20).

2. The double-cylinder lock (10) according to claim 1, wherein rotation of the knob (20) causes rotation of the rotation transmission member (22).

3. The double-cylinder lock (10) according to claim 1, wherein the rotation transmission member (22) is connected to the key push element (44), and wherein the rotation of the knob (20) causes the rotation transmission member (22) to move, and enables the rotation of the cam (30) to be realized by the rotation of the knob (20).

4. The double cylinder lock (10) according to claim 3, wherein the rotation of the knob (20) that causes the rotation transmission member (22) causes the key push element (44) to move toward the key operation cylinder housing (12).

5. The double-cylinder lock (10) according to claim 1, wherein the rotation transmission member (22) is coupled to the blocking element (40) by means of a pusher element (38), the pusher element (38) being arranged adjacent to and abutting the blocking element (40).

6. The double cylinder lock (10) according to claim 3, wherein the rotation transmission member (22) is connected to the key push element (44) by means of a pusher element (38) having a hole (35), and the key push element (44) is disposed in the hole (35).

7. The double-cylinder lock (10) according to claim 5, wherein the rotation transmission member (22) includes an inclined surface (34), a pin (36) resting on the inclined surface (34), and the pin (36) being fixed to the pusher element (38).

8. The double-cylinder lock (10) according to claim 1, wherein in the blocking position, the blocking portion (42) of the blocking element (40) is located between the cam (30) and the key operation cylinder housing (12).

9. A double-cylinder lock (10), comprising: A key operation cylinder housing (12) is provided in which a key operation lock cylinder (14) with a key slot (15) is provided; A knob housing (16) is provided with a knob mechanism (18); as well as A rotatable cam (30) located between the key operation cylinder housing (12) and the knob cylinder housing (16); and A blocking element (40) is initially in a blocking position relative to the cam (30), the blocking position preventing rotation of the cam (30); The knob mechanism (18) includes a knob (20) connected to a rotation transmission member (22), which is connected to a key pusher element (44) and also connected to a cam thrower element (24) arranged to rotate the cam (30). The rotation transmission member (22) is also connected to the blocking element (40), and rotation of the knob (20) causes movement of the rotation transmission member (22), which causes the blocking element (40) to move out of the blocking position and enables rotation of the cam (30) by rotation of the knob (20).

10. The double-cylinder lock (10) according to claim 9, wherein rotation of the knob (20) that causes movement of the rotation transmission member (22) causes linear movement of the key push element (44) toward the key operating cylinder housing (12).

11. The double-cylinder lock (10) according to claim 9, wherein rotation of the knob (20) causes rotation of the rotation transmission member (22), and rotation of the rotation transmission member (22) causes rotation of the cam (30).

12. The double-cylinder lock (10) according to claim 9, wherein rotation of the knob (20) causes rotation of the rotation transmission member (22), the rotation of the rotation transmission member (22) causes the blocking portion (42) of the blocking element (40) to move out of the blocking position relative to the cam (30), the blocking position preventing rotation of the cam (30).

13. The double-cylinder lock (10) according to claim 12, wherein the rotation transmission member (22) is coupled to the blocking element (40) by means of a pusher element (38), the pusher element (38) being arranged adjacent to and abutting the blocking element (40).

14. The double-cylinder lock (10) according to claim 13, wherein the rotation transmission member (22) includes an inclined surface (34), a pin (36) resting on the inclined surface (34), the pin (36) being fixed to the pusher element (38).

15. The double-cylinder lock (10) according to claim 12, wherein in the blocking position, the blocking portion (42) is located between the cam (30) and the key operation cylinder housing (12).

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