GB1573136A

GB1573136A - Door locks

Info

Publication number: GB1573136A
Application number: GB27449/77A
Authority: GB
Original assignee: Ymos Metallwerke Wolf and Becker GmbH and Co
Current assignee: Ymos Metallwerke Wolf and Becker GmbH and Co
Priority date: 1976-06-30
Filing date: 1977-06-30
Publication date: 1980-08-13
Also published as: FR2356793A1; DE2629332A1; SE7707534L

Description

(54) DOOR LOCKS (71) We, YMOS METALLWERKE WOLFE AND BECKER GmbH & Co., a German Company, of Feldstrasse 12, D-6055 Hausen, Krs., Offenback-on-Main, Federal Republic of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to a door lock for motor vehicles. Door locks of said type of the most varied constructions are known and despite the constant advances in connection with safety mechanisms, they still fail to provide absolute security against unauthorised opening of doors. The vehicle doors are opened either by means of skeleton keys produced for example during inspections of the vehicle or by other means permitting in particular the unlocking of the inside locking button in the vehicle door.

According to the invention, there is provided a door lock having a safety or main lock cylinder which can be locked with two different keys and which has three locking positions as well as a dog with a projection connected in a non-rotatable manner and which engages behind a second projection on a housing following rotation, axial displacement, further rotation and axial return displacement of the main lock cylinder.

If a security system according to the invention is to be incorporated into a vehicle with a conventional door lock, then the main lock cylinder is additionally incorporated as a second lock cylinder.

Through the use of the main lock cylinder, it is more difficult and time consuming then hitherto to open the vehicle door without destroying parts of the vehicle. It also makes it impossible to copy a skeleton key from the safety or master key when the vehicle is being repaired in a workshop, because only the additional key is handed over which cannot bring the main lock cylinder into the additional locking position.

In order that the vehicle owner does not have to operate two lock cylinders or lock the vehicle with two different keys, according to a further development of the invention, the main lock cylinder has two locking positions, whereby the first functions simultaneously with the additional lock cylinder, whilst the second is providing for locking the door locking mechanism and is only attainable with the master key.

When using only a single main lock cylinder, it is only possible to reach the first locking position "closed" with the additional key, whilst with the master key it is possible to obtain the first "closed" position and the second locking position "locked". The provision of the additional locking cylinder makes the opening and closing of the vehicle door no more laborious for the owner of the master key than hitherto.

An imbodiment of the inventtion is explained hereinafter with reference to the accompanying drawings, wherein: Figure 1 is a partial view of a motor vehicle with a door lock according to the invention.

Figure 2 is a view of the door lock in the "open" position.

Figure 3 is a sectional view of the door lock of Figure 2 but in the "closed" position.

Figure 4 is a sectional view of the door lock as in Figure 2 but in the "locked" position.

Figure 5 is a detail of the door lock according to Figure 2 in the direction of the arrow V.

Figure 6 is a view of the main lock cylinder in the "open" position on a larger scale.

Figure 7 is a sectional view along the line VII-VII in Figure 6.

Figure 8 a view similar to view 6 with an axially displaced lock cylinder in the "closed" position.

Figure 9 a sectional view of the main lock cylinder in the "lcoked" position.

Figure 10 a sectional view along the line X-X of Figure 6 in the "open" position.

Figure 11 a broken away sectional view through the housing which receives the main cylinder along the line XI-XI of Figure 7.

Figure 12 a sectional view along the line VIII-VIII of Figure 6 in the "open" position.

Figure 13 a sectional view along the line VIII-VIII of Figure 6 in the "locked" position.

Figure 14 a sectional view through the door locking mechanism of the front seat passenger's door.

Figure 15 a detail according to Figure 14 in the direction of the arrow XV.

Figure 16 a sectional view through the locking mechanism of the rear door.

Figure 17 a detail according to Figure 16 in the direction of arrow XVII.

Figure 18 a sectional view through the locking mechanism of a rear door along the line XVIII-XVIII of Figure 16.

Figure 19 a sectional view through the locking mechanism of a rear door along the line XIX-XIX of Figure 16, in the locked position.

Figure 20 a sectional view through the locking mechanism of Figure 19, but in the "open" position.

Figure 21 a view of the locking mechanism of a rear door in the "open" position.

Figure 22 a view of the main lock cylinder which can be locked with two keys.

Figure 23 a sectional view along the line XXIII-XXIII in Figure 22.

As can be seen in Figure 1, vehicle door 1 of motor vehicle 2 has a door lock 3 with a main lock cylinder 4 and an additional lock cylinder 5. In the represented embodiment, the main lock cylinder 4 is positioned below the additional lock cylinder 5 arranged alongside handle 6, but the position of the lock cylinder can also be reversed or selected in any other random manner.

According to Figure 2, the door lock 3 comprises an inside safety catch 8 with an plurality of arms and pawl-like stops mounted on a spindle 7 inside vehicle door 1.

To arm 9 of the inside safety catch 8 is connected the connecting rod 10 of the inside locking button 11 and on a second arm 13, having a slot 12, engages a dog 14, which can be controlled by means of the additional lock cylinder 5. A third arm 15 of the inside safety catch 8 has an opening 16 in which engages a pivoted lever 17 mounted on spindle 27 and which is connected via bearing pin 28 with lock lever 19 which can be pivoted to one side.

Onto lock lever 19 is clipped clip 26, on whose spigot 29 is mounted in rotatable manner holder 18 into which is screwed rod 20. whose other end 21 is hung into dog 22 and controlled by main lock cylinder 4.

Pivoted lever 17 can be pivoted as desired by dog 14 or 22.

A fourth arm 23 on inner safety catch 8, like a pawl-like projection 24 on arm 15 serves as a stop on a projection 25 of the lock plate which engages between the same.

Main lock cylinder 4 is arranged in a housing 30 in a rotatable and axially displaceable manner (Figure 6). On its free end 31 it carries a dog 33 with its projection 34 which projects towards housing 30 and which is for example connected in non-rotatable manner via a pin 32. Projection 34 always engages, i.e. in any operating position of the main lock cylinder 4, between two projections 35 and 36 of a freely rotatable restoring ring 37 located on a shoulder of dog 22. Ring 37 has a projection 38 extending axially towards the housing, which according to Figure 10 is located between ends 39 and 40 of the torsion spring 41.

Alongside projection 38 of restoring ring 37 is provided a projection 42 which extends axially towards the restoring ring 37 from housing 30 and is displaced radially inwards in the position according to Figure 10. If main lock cylinder 4 is pivoted from the position of Figure 10 in a clockwise direction or in any other direction, then projection 38 of restoring ring 37 is moved counter to the action of torsion spring 41. In each case one end 39' or 40 is applied to projection 38 or projection 42, so that torsion spring 41 always draws back restoring ring 37 into the neutral position shown in Figure 10.

The. neutral position of the main lock cylinder 4 is indicated in Figure 2 by "a", whilst the "closed" position is indicated by "b", the "locked" position by "c" and the safety position by "d", whereby in the position "a" and "d" the key can be removed.

On housing 30 is provided a further, axially extending projection 43 which projects into the path of movement of projection 34 of dog 33. Projection 34 can only pass by projection 43 if main lock cylinder 4 is axially displaced into the "closed" position, whereby dog 33 is correspondingly axially displaced.

Restoring ring 37 is mounted in a nonrotatable manner on main lock cylinder 4 by the engagement of projection 34 between its projections 35 and 36. However, in the case of an axial displacement of the lock cylinder, it does not move in the axial direction, in the same way as the dog 22, arranged between dog 33 and restoring ring 37, mounted in freely rotatable manner on the tubular attachment 30a of housing 30.

If main lock cylinder 4 is moved into its axially inwardly displaced position counter to the tension of a compression spring 44 (Figure 8) projection 34 can pass by projection 43 and jump behind the latter to the left in Figure 8. During this operation, dog 22 remains stationary.

In dog 22 are provided two recesses 45 and 46 in which can engage a further projection 47 of dog 33 which extends axially towards housing 30. Projection 47 engages in recess 46 when projection 34 on dog 33 after rotating the main lock cylinder 4 has jumped back from the position of Figure 9 behind projection 43 (i.e. to the left of projection 43 into a locked position. The main lock cylinder is now in the safety position "d" according to Figure 2 and holds the dog 22 in a nonrotatable position, thus locking the inside safety catch 8 via rod 20 and pivoted layer 17.

In the other operating positions "a", "b" and "c" projection 47 of dog 33 is located in the curved slot or recess 46 and controls dog 22 by striking against the limit surfaces 48 and 49 of recess 46. As soon as on rotating main lock cylinder 4, dog 33 and consequently its projection 47 is pivoted in a clockwise direction or counter clockwise direction from the neutral position according to Figure 10, dog 22 is correspondingly rotated.

It is obvious that the locking channels 50, 51, 52 and 53 (Figures 7 and 11) for tumblers 54 in housing 30 are arranged in such a way that on reaching neutral position "a" and safety position "d", key 55 can be removed.

On removing key 55, tumblers 54 engage in the locking channels 50, 51 is matched to the number to tumblers 54 in such a way that after removing key 55, the main lock cylinder 4 cannot be moved axially inwards, because tumblers 54 are supported on the locking channel ends 56, 57 by the part thereof which projects from the main lock cylinder 54.

According to Figures 9 and 12, an electrical switch 60 is fitted by means of a screw 61 to housing 30 and contains tripping pins 62, 62a, whose free ends 63, 63a pass through bores, only one of which is shown at 64, in housing 30 and project into the path of movement of trip cam 65, to which end it is subject to the action of a compression spring 67. At its end facing the compression spring 67, tripping pin 62, 62a carries a U-shaped contact bridge piece 68, by means of which the two poles 69, 70 are electrically interconnected in the case of a corresponding displacement of tripping pin 62.

On rotating the main lock cylinder 4 into the "open" position according to Figure 12, trip cam 65 pivots past the resilient tripping pin 62 in a counter clockwise direction until the second trip cam 66 strikes against a project 71 of housing 30. Simultaneously, dog 22 is pivoted into the "open" position by projection 47 of dog 33.

When trip cam 65 passes by, tripping pin 62 is displaced and via contact bridge piece 68 short-circuits poles 69 and 70 in whose circuit is connected magnets in the front passenger and/or rear doors and which unlock the locks of the said doors. If by means of torsion spring 41 main lock cylinder 4 is again moved into the neutral position according to Figure 12, then the circuit in switch 60 is interrupted by the removal of trip cam 65.

Simultaneously, projection 47 of dog 33 is pivoted into recess 46 of dog 22, whilst dog 22 remains in the "open" position.

Closing into the "closed" position takes place in the clockwise direction from the position of Figure 12. Main lock cylinder 4 via dog 33 and its projection 47 rotates dog 22 from the "open" position into the "closed" position until projection 34 of dog 33 strikes against projection 43 of housing 30. By means of torsion spring 41, the main lock cylinder is rotated back into the neutral position in the same way as from the "open" position, whereby through the shape and length of recess 46 dog 22 remains in "closed" position. In this position, the edge 72 of dog 22 is positioned approimately perpendicularly in Figure 12.

If the door lock is to be locked or brought into the safety position, then main lock cylinder 4 must be brought into the "closed" position in an axial direction counter to the tension of a compression spring 44 acting thereon together with its trip cam 56 (Figures 8 and 12) until it meets a stop face 73 in housing 30 and it is then rotated further until trip cam 65 (Figures 6 and 13) strikes against projection 71 of housing 30. On passing by tripping pin 62a, the not shown poles 69, 70 are shortcircuited and the magnets of the other doors lock their locks.

The current pulse in electrical switch 60 is interrupted again if the main lock cylinder 4 in the safety position according to Figure 13 is rotated back into the initial axial position by compression spring 44.

On forceing the main lock cylinder 4 into housing 30, projection 47 leaves recess 46, on further rotating the main lock cylinder 4 is pivoted into a position above recess 45 and during the following axial return movement of main lock cylinder 4 passed into the latter in accordance with Figure 13. As the projection 47 of dog 33 according to Figure 9 is now engaged to the left against projection 43 of housing 30, the main lock cylinder cannot be rotated back into the neutral position by torsion spring 41 and dog 22 is locked in the safety position by projection 47 of dog 33. As a result, the door lock cannot be opened by means of additional lock cylinder 5, as was possible in the "closed" position of main lock cylinder 4, because then projection 47 occupied a central position between the limit surfaces 48, 49 of recess 46.On removing key 55 the same situation exists as described hereinbefore, i.e. main lock cylinder 4 cannot be axially inserted into housing 30, because the inner most tumblers 54 on the radially directed surfaces are supported on the locking channel ends 56, 57.

If for example the locking mechanism is controlled with only one main lock cylinder 4 (Figure 22) the latter is operated in such a way that locking can now take place with both the master key 55 and the additional key 140. The locking function which can be achieved with the additional key is limited because the last two milled slots 141 of additional key 140 do not coincide with those of the associated tumblers 54 and by its end 142 it projects above the main lock cylinder 4, so that the latter can only be rotated in the area of recess 143. This rotation path, viewed from the neutral position "a", corresponds to "open" and "closed".

In the case of master key 55, all the tumblers 54 are matched with the key slot 141, so that the main lock cylinder 4 can also be axially displaced into the "closed" position and can be rotated into the safety position "d".

The locking functions correspond to those of the first-described embodiment.

Figures 14 and 15 provide details of magnetically operating locking mechanism 80 in the door 81 serving the front seat passenger.

This locking mechanism 80 comprises a bearing body 82, carrying a control magnet 83 with its armature pin 84. A lever 88 having arms 86, 87 which are at an angle to one another is pivotably mounted on a spindle 85 on bearing body 82 and a bush 90 having a projection 89 is guided in the bearing body 82 and is subject to the action of a compression spring 91 arranged within said bearing body, said spring being supported on an insertable plate 92.

As soon as control magnet 83 receives a current pulse from electrical switch 60, it draws armature pin 84 into it and lever 88 is pivoted in a clockwise direction by compression spring 91 via projection 89 and its arm 87 when the opening 93 (Figure 15) in a pivotable pawl 94, also mounted on bearing body 82, is located precisely in front of the front surface 95 of bush 90 corresponding to the closing position of the locking mechanism 80. This is the case when the inside locking button or the rod 97 which leads thereto and which is connected to pawl 94 in joint 96 is located in the "closed" position. Bush 90 then engages in opening 93 of pawl 94 and locks the inside locking button or its rod 97 via holder 98 and lever 99 of lock 100. Lever 99 is connected with pawl 94 via holder 98 and the angle-shaped end 101 of rod 97.

If control magnet 83 receives a current pulse when rod 97 of the inside locking button is the "open" position, bush 90 is supported on the surface of pawl 94 until the latter is pivoted into the locking position.

To open locking mechanism 80 armature pin 84 is forced into the position of Figure 4 as the result of a current pulse from control magnet 83 and consequently pivots lever 88 which, via projection 89, draws bush 90 out of pawl 94. Thus, locking mechanism 80 is unlocked.

The holding force of control magnet 83 in its two end positions is larger than the compressive force of compression spring 91 so that the latter is unable to move bush 90 into the locking position, accompanied by the simultaneous pivoting of lever 88.

The locking mechanism 110 for the two rear doors 111 of the vehicle is shown in Figures 16 to 21. It comprises a bearing body 115 constituted by two halves 112, 113, mounted on both sides on a supporting part 114 of rear door 111. A control magnet 116 with an axially displaceable armature pin 117 is fixed to the bearing body 115. Bearing half 113 engages with an approximately tubular part 118 into a bore 119 of bearing half 112 and in a direction perpendicular to armature pin 117 guides a locking plate 120 in which there is an opening 121. The diameter of opening 121 corresponds to the diameter of a bush 122 arranged in longitudinally displaceable manner on armature pin 117 by means of a transverse pin 124 fixed in the armature pin 117 and engaging in slots 123 of bush 122.Finally, the bush 122 is provided with a further compression spring 125 which is supported on bush 122 and the end face of armature pin 117.

As can be gathere from Figures 19 to 21, a rod 126 is hung in U-shaped manner in locking plate 120 in a recess which surrounds the opening 121 of said plate 120 and leads on the one hand to a toggle lever 127 and on the other to a lock lever. Rod 126 and the inside locking button 128 or its rod 129 are articulated to the pivotable toggle lever 127.

If the inside locking button 128 is displaced onto the "closed" position, then opening 121 of locking plate 120 is congruently in front of the end face of bush 122.

As a result, bush 122, with the aid of compression spring 125, engages in opening 121 and locks rod 126 or inside locking button 128 and the rear door lock. For supporting purposes, the bush is guided in a bore 130 of bearing half 113, whose tubular part 118 projects through an opening 131 in part 114 of the outer bearing half 112.

In the same way as control magnet 83, control magnet 116 displaces armature pin 117 and consequently bush 122 into the locking position when trip cam 65 in Figure 12 displaces the tripping pin 62 of switch 60, so that the control magnet or magnets receive a current pulse. If the inside locking button 128 is in the "open" position when such a pulse is received, then opening 121 in locking plate 120 and bush 122 are displaced relative to one another and bush 122 cannot enter opening 121. Due to compression spring 125, bush 122 remains alongside opening 121 on the surface of locking plate 120 until through the displacement of button 128 the latter is brought into a position in which opening 121 is again located in frong of bush 122. In this position, inside locking button 128 and the door lock are in the "closed" position.

Even if the inside locking button 128 of the locking plate 120 according to Figure 21 are in the "open" position, armature pin 117 can be moved into the locking position by control magnet 116 because the slots 123 and compression spring 125 permit a movement compensation of bush 122 and also lead to bush 122 being pressed into the opening 121 of locking plate 120 if the latter is subsequently moved into the locking position.

The holding force of control magnet 116 in its end positions is once again larger than the tension of compression spring 125, so that in the case of a subsequent movement of the inside locking button 128 bush 122 can enter opening 121.

If control magnet 116 receives an opening pulse, armature pin 117 draws bush 122 out of the locking plate 120, whereby transverse pin 124 engages on the end of slots 123 facing control magnet 116.

WHAT WE CLAIM IS: 1. A door lock having a safety or main lock cylinder which can be locked with two different keys and which has three locking positions as well as a dog with a projection connected in a non-rotatable manner and which engages behind a second projection on a housing following rotation, axial displacement, further rotation and axial return displacement of the main lock cylinder.

2. A door lock according to Claim 1, wherein a main lock cylinder and an additional lock cylinder with different master and additional keys for locking and opening the door locking mechanism are provided.

3. A door lock according to Claim 2, wherein the door locking mechanism can be secured in a safety position in such a way that it cannot be locked by means of the additional key.

4. A door lock according to Claim 2, wherein the main lock cylinder and the additional lock cylinder can in each case only be locked by the associated main key or additional key.

5. A door lock according to Claim 2, which can also be controlled solely by means of key of main lock cylinder, even if the additional lock cylinder is in its locking position.

6. A door lock according to Claim 2, characterised in that the main lock cylinder controls an electrical switch via which the door locking mechanisms or other vehicle doors can be controlled.

7. A door lock according to Claim 1, wherein the dog carries a further projection which is able to engage in recesses of a second dog which is mounted in freely rotatable manner alongside the first-mentioned dog on a tubular attachment of housing.

8. A door lock constructed and arranged substantially as hereinbefore described and shown in the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **.

121 on the surface of locking plate 120 until through the displacement of button 128 the latter is brought into a position in which opening 121 is again located in frong of bush 122. In this position, inside locking button 128 and the door lock are in the "closed" position.

Even if the inside locking button 128 of the locking plate 120 according to Figure 21 are in the "open" position, armature pin 117 can be moved into the locking position by control magnet 116 because the slots 123 and compression spring 125 permit a movement compensation of bush 122 and also lead to bush 122 being pressed into the opening 121 of locking plate 120 if the latter is subsequently moved into the locking position.

The holding force of control magnet 116 in its end positions is once again larger than the tension of compression spring 125, so that in the case of a subsequent movement of the inside locking button 128 bush 122 can enter opening 121.

If control magnet 116 receives an opening pulse, armature pin 117 draws bush 122 out of the locking plate 120, whereby transverse pin 124 engages on the end of slots 123 facing control magnet 116.

WHAT WE CLAIM IS: 1. A door lock having a safety or main lock cylinder which can be locked with two different keys and which has three locking positions as well as a dog with a projection connected in a non-rotatable manner and which engages behind a second projection on a housing following rotation, axial displacement, further rotation and axial return displacement of the main lock cylinder.
2. A door lock according to Claim 1, wherein a main lock cylinder and an additional lock cylinder with different master and additional keys for locking and opening the door locking mechanism are provided.
3. A door lock according to Claim 2, wherein the door locking mechanism can be secured in a safety position in such a way that it cannot be locked by means of the additional key.
4. A door lock according to Claim 2, wherein the main lock cylinder and the additional lock cylinder can in each case only be locked by the associated main key or additional key.
5. A door lock according to Claim 2, which can also be controlled solely by means of key of main lock cylinder, even if the additional lock cylinder is in its locking position.
6. A door lock according to Claim 2, characterised in that the main lock cylinder controls an electrical switch via which the door locking mechanisms or other vehicle doors can be controlled.
7. A door lock according to Claim 1, wherein the dog carries a further projection which is able to engage in recesses of a second dog which is mounted in freely rotatable manner alongside the first-mentioned dog on a tubular attachment of housing.
8. A door lock constructed and arranged substantially as hereinbefore described and shown in the accompanying drawings.