Lock actuated by an electric motor.

p0001The invention relates to a lock according to the preamble of claim 1.

p0002From EP-A-200 919 an electrically controllable door lock is known, which can be blocked by means of an investment in a correspondingly shaped insertion opening its lock housing profile lock cylinder. The profile cylinder has, as usual, in its cylinder part an axially extending keyway for receiving the key, and from the cylinder part is radially a standoff. In the lock housing, an electronic control circuit is included, which is connected via a plurality of electrical contact elements with a housed in the profile cylinder reading means. The reader detects control information of the key, for example, electronic locking codes that supplement the mechanical locking of the key codes to increase the locking safety.

p0003Another electric motor driven door lock will be in the German patent application P 37 42 153.0 is proposed (EP-A-320 008). In this door lock of the latch is switched on and pushed by an electric motor. The electric motor is coupled for both directions of movement of the bolt via a transmission with a driver device, which, in the retracted bolt also the case of the door lock retracts. The trap is in the rest independently of the drive by the electric motor manually retractable by a handle follower, as in the torque transmission path of the transmission designed as a detent coupling overload clutch is arranged. The solution proposed in the patent application mentioned detent coupling is designed as a ratchet clutch with a pivotally mounted, spring-loaded latch. The structural complexity of the proposed locking coupling is however relatively high since a plurality items must be riveted together and assembled. The object of the invention to simplify the overload coupling of a door lock of the proposed in the patent application P 37 42 153.0 Art, the release torque of the overload clutch must be accurately predetermined.

p0004This problem of the invention is achieved by the features specified in the characterizing part of claim 1. The bearing the latching projection slides can be mounted easily, especially in the embodiment of claim 2 or 3. The embodiments according to claim 3 and claim 4 have the additional advantage of particularly compact construction, whereas claim 5 facilitates the integration of the overload clutch in the transmission.

p0005Compared to conventional, mechanically or manually lockable locks proposed in the patent application P 37 42 153.0 electric motor driven door lock contains a variety of additional components, so that a narrow construction of the components is of particular importance. In the door lock proposed in the patent application P 37 42 153.0, the rotational movement of the electric motor by a rack gear is converted into a translational movement. The rack gear is not provided directly on the lock, but on a transverse translational movement to the latch to the lock housing slidably guided control part. The control member is coupled to both directions of movement of the bolt via inclined thrust surfaces with the bolt and can be moved beyond the retracted end position of the bolt position assigned to take a driver stop the event in the feed direction. For the retraction movement of the case during the thrust movement of the bolt merely translationally shifted control part is deflected in a pivoting movement that drives the case directly in the feed direction. The rack tooth transverse to the section of the locking movement causing the trap feeding motion portion.

p0006In order to reduce the installation space for the gear, in a further aspect of the invention, the rack gear portions of the bolt movement and the case of movement are arranged so that they pass over into a concave toothed portion into each other. This simple measure, the gear ratio can be increased, whereby a greater force for the management of the case is available.

p0007In the German in the patent application P 37 42 153 proposed door lock both the case and the spindle hole of a leg spring in the respective rest position is maintained. However, the support of such torsion springs requires in the lock housing comparatively large amount of space, which can be reduced in accordance with claim. 7 The Ausschubfeder the case is housed in an already provided guide opening its latch tail and formed for example as a helical compression spring. The spindle hole is held by a concentrically arranged her spiral torsion spring in the rest position, the torsion spring may also be accommodated within the already foreseen for the spindle hole installation space. The previously required for the torsion springs space can be used for be housed in the lock housing electronic equipment.

p0008In the following an embodiment of the invention is explained in more detail with reference to a drawing. In the drawing:<dl id="dl0001"><dt>Fig. 1</dt><dd>a side view of an electric motor-driven push-in door lock when pushed-out bolt and being outworked case, the clarity is lost because of a side wall;</dd><dt>FIG. 2</dt><dd>a partial sectional view through the door lock, as seen along line II-II in Fig. 1;</dd><dt>Fig. 3</dt><dd>a side view of the door lock of Figure 1, eject latch and pushed out the case.</dd><dt>Fig. 4</dt><dd>a side view of the door lock of Figure 1, eject latch and motorized reclusive case.</dd><dt>Fig. 5</dt><dd>a side view of the door lock of Figure 1 during manual opening. </dd><dt>Fig. 6</dt><dd>a detail section through the area of ​​a profile cylinder of the door lock of Figure 1 and its attachment organs.</dd><dt>Fig. 7</dt><dd>a side view of an overload clutch of the door lock of Figure 1 in the engaged state.</dd><dt>Fig. 8</dt><dd>a sectional view of the overload clutch, as seen along line VIII-VIII in Fig. 7;</dd><dt>Fig. 9</dt><dd>a side view of the overload clutch according to Fig. 7 in the disengaged state and</dd><dt>Fig. 10</dt><dd>a sectional view of the overload clutch, as seen along a line XX in Fig. 9,</dd><dt>Fig. 11</dt><dd>a detail section through the area of ​​a profile cylinder and its fastening members, in a variant of the door lock according to Fig. 1, seen along line XI-XI of FIG. 12 and</dd><dt>Fig. 12</dt><dd>a sectional view taken along a line XII-XII of Fig. 11.</dd></dl>

p0009Figs. 1 and 2 show a plug-in door lock with a narrow side arranged by side wall panels 1, 3 and a face plate 5 limited lock housing 7. In the lock housing 7 a trap 9 is guided perpendicular to the faceplate 5 displaced, the head 11 is not illustrated by a illustrated opening the faceplate 5 exits and their tail is 13 out on a stationary, engaging in a slot 15 of the tail 13 pins 17th In the oblong hole 15 a compression coil spring 19 is housed, which is supported at one end on the pin 17 and on the other hand on the catch head side end of the long hole 15 and the case 9 biases in the extension direction. The case 9 can be retracted by means of a pivotally mounted in the lock housing 7 spindle hole 21 by means of a pusher not shown in detail, arranged on the inside of the door against the compression coil spring 19th The spindle hole 21 has for this purpose a finger 23, the 13, the case 9 takes along a shoulder 25 of the latch tail in the feed direction. A constructed as torsional helical spring return spring 27 holds the spindle hole 21 in the case of 9-releasing rest position. The return spring 27 surrounds the spindle hole 21 coaxially and requires hardly any more space than the spindle hole 21 itself. The lock housing 7 has space for additional electronic components.

p0010In the lock housing 7 a bolt 29 is guided perpendicular to the face plate 5 slidably in spaced relation to the case 9, which passes with its bolt head 31 through a non-illustrated opening the face plate 5 and with its bolt tail 32 within the lock housing 7 fixed to the housing between two pins 33, is out 35th The latch 29 is pulled and pushed, which is also independent of the lever handle the case draws 9 by an electric motor 37th The electric motor 37 is controlled by a control circuit not shown in detail, as it is described for example in DE-A-36 06 620th The control talks here on an electronically coded key, not shown, and is for this purpose arranged with a profile cylinder 38 of the door lock, connected information of in a key channel 39 of the profile cylinder 38 read and accordingly electrical signals delivered reader 40th

p0011The electric motor 37 drives via a gear transmission 41 to a plate-shaped control part 43 which is between the inner side of the faceplate 5 and the pins 33, 35 is guided at right angles to the direction of movement of both the latch 9 and the bolt 29 to be linearly displaceable. The arranged between the latch 9 and the bolt 29 Transmission 41 includes a seated on the output shaft of the electric motor 37 worm 45, which meshes with a in the side wall panel 1 on the one hand and a housing-fixed bearing plate 47 on the other hand mounted worm 49th The worm wheel 49 drives, via a coaxially arranged pinion 51, a gear 53, which is subsequently explained in greater detail a, only a predetermined torque transmitting overload coupling 55 is coupled with a pinion. The pinion 57 engages in a parallel to the face plate 5, ie parallel to the direction of displacement of the control part 43 runs, the control part 43 driving rack gear 59 a. Perpendicular to the direction of movement of the bolt 29 extending sliding movement of the control part 43 is engaged via a oblique to both directions of movement extending slot 61 in the control part, in which a mounted on the bolt 29 pin 63 is transmitted to the latch 29th

p0012FIG. 1 shows the door lock in locked state, ie completely pushed-out from the lock housing 7 latch 29, in which the control part is provided in its trap 9 remotely located position 43. Fig. 3 shows the door lock in retracted bolt 29, but being pushed trap 9, in which the electric motor 37 has the control part 43 of the latch 9 approximated by retraction of the bolt 29. As shown in FIGS. 1 and 3, has the movement of the bolt 29 controlling slot 61 is substantially Z-shape with the ends of an obliquely both extending transversely to the direction of movement of the bolt 29 and the direction of movement of the control member 43 the central portion 65 of the slot 61 perpendicular to the direction of the bar 29 extending end portions 67, 69 connect. The end sections 67, 69 take in the fully retracted or fully retracted position of the bar 29 on the pin 63, thereby ensuring forced to insert or remove the bolt 29th

p0013The control part 43 also controls the feed motion of the case 9. The case 9 adjacent transmits the control part 43 a finger 75, which retracts, retract bolt 29 in a limited by a shoulder 77 of the recess latch tail. 13 The rack gear 59 extends over the space required for the bolt movement, the face plate 5 parallel rectilinear area beyond and is bent over a concave toothed portion 78 to a gear section out in which the pin 63 of the bolt head enters the end portion 69 of the slot 61 31, is curved towards the face-plate 5, so that the meshing with the rack gear 59 pinion 57 the control member 43 pivots about the pin 63 around in the figures in clockwise direction. The finger 75 takes this, as FIG. 4 shows the case 9 in the feed direction with. Fig. 4 shows the door lock with an electric motor retracted bolt 29 and an electric motor retracted case 9. In order to enable the pivotal movement of the control part 43, are the bolt tail 32 leading pins 33, 35 arranged so that the control part 43 for pivotal movement between the pin 33 can tilt 63rd The face plate of the adjacent corner is provided with a flat 79th As the rack gear 59 in the arch area on the concave, ie the outside runs, results compared to the inside of an increased reduction, which reduces the footprint of the transmission 41st

p0014The door lock can be independent of the electric motor drive need be manually opened by pressing the door handle even if the latch 29 is pushed further (panic function). As Fig. 5 shows, is pivoted by rotating the means arranged on the inside of the door, on the secure side of the door trigger, the spindle hole, whereby the finger 23 on the proposed the catch tail 13 shoulder 25, the event draws. 9 At the same time takes a molded onto the spindle hole 21 projection 81, the control part 43 in the opening direction of the latch 29 with. The projection 81 kicks in this case on a projection 83 of the control part 43, for example a riveted-on peg of the control part 43, to. The forced movement of the control part 43 is transmitted through the inclined surfaces of the slot 61 and the pin 63 on the latch 29, which is thereby displaced into its retracted position. The arranged in the drive path of the transmission 41 between the electric motor 37 and the control part 43 the overload clutch 55 is overcome by the manual operation of the control part 43 and coupling from the self-locking screw per se 45th The overload clutch 55 also protects in electric motor drive of the door lock the electric motor 37 and the gear 43 against overloading. Details of the overload clutch are explained below with reference to FIGS. 7-10.

p0015The electric motor 37 is controlled by an electronic circuit not shown, which is housed on a side of the mechanical components of the door lock mounted circuit board 85 between the side walls 1, 3 of the lock housing. 7 The electronic circuit is connected to the reading means 40 of profile cylinder 38 over a plurality, for example six lines. The seated in a complementarily shaped insertion opening 87 of the two side parts 1, 3 profile cylinder 38 is connected via a connector 89 in this leads to the electronic circuit. Fig. 6 shows details of the connector 89 and an associated holding device 91, 38 detachably holding the profile cylinder in the insertion 87th In contrast to Figs. 1 to 5 the holding device 91 is, however, shown in a position which allows the removal of the profile cylinder 38. The holding device 91 has a held at the lock housing 7 bearing block 93 with the insertion opening 87 in alignment recess 95, engages in the one of the cylinder part 97 of the profile cylinder protruding ridge 99th The recess 95 surrounds the web 99 both laterally and along its distant from the cylinder portion 97 longitudinal edge and ensure that the profile cylinder 38 relative to the bearing block 93 is centered and not by edges of the profile cylinder with low abundance enclosing insertion 87. One in bearing block 93 held guide pin 101 is a carriage 103 guided, distributed on a bracket 105, a bar with several, along the profile cylinder 38 sockets 107 carries the connector 89th The complementary connecting elements of the connector 89 are arranged as plug pins 109 completely within a recess of the web 99 of the profiled cylinder 38 on a power strip 111th The web 99 thus protects the sensitive connector pins 109 against damage and soiling.

p0016The carriage 103 is displaced by means of a rotation by an abutment 113, but axially captured on the face plate 5 screw 115 along the guide pin 101, the threaded stud 115 is screwed into a threaded bushing 117, the rotation with a locking pin 119 mounted on the carriage 103 is. The carriage 103 carries, in addition to the sockets 107 a locking pin 121, the profile of the cylinder 38 on the side of the connector pins 109 is associated with a detent opening 123 on the web 99th The detent pin 121 is in the carriage 103 axially parallel to the guide pin 101 and carries in a chamber 125 of the carriage 103 an annular collar 127. Between the annular collar 127 and one engaging in the chamber shoulder 129 of the threaded bushing 117 is a disc spring assembly 131 is clamped, the locking bolt the 121 to the latch opening 123 biases towards. The catch of the opening 123 adjacent end of the locking pin 121 is guided in a guide hole 133 of the bearing block 93rd

p0017The guide pin 101 and the locking pin 121 guide the slide 103 against rotation and centered relative to the bearing block. Since the distance between the latch opening 123 and the adjacent end of the locking pin 121 in the profile cylinder 38 releasing position of the carriage 103 is smaller than the distance between the sockets 107 and plug pins 109, engages the latch pin 121 on the profile cylinder 38, before the connector 89 is closed. The locking pin 121 is locked so that the profile cylinder 38 in the sockets 107 and plug pins 109 aligned aligning each position before the contact is closed. Damage the sockets 107 and the plug pins 109 due to misalignment are avoided.

p0018The locking force of the locking pin 121 is initially determined by the bias of the plate spring packet 131st In individual cases, the bias may be too small to 38 operatively secure the profile cylinder against withdrawal. To achieve this, the block length of the fully compressed disk spring assembly 131 is selected such that the locking pin 121 non-displaceably engages in the end position of the carriage 103 in the detent opening 123 and is supported by the fully compressed disk spring assembly 131 on the extension 129 of the threaded sleeve 117th In the end position of the carriage 103, the connector 89 is closed, whereby the length of the plug pins 109 such that it can compensate for movement tolerances of the bushes.

p0019On the engagement pin 121 opposite side a verse budding with a ball tip 137 centering pin 139 guided in a coaxial to the locking pin 121 bore 135 of the bearing block 93, which is biased by a compression spring 141 in a detent opening 143 of the web 99 inside. The profile cylinder 38 can be 141 inserted into the recess 95 of the bearing block 93 by overcoming the pressure spring, the center pin 139 for a pre-centering of the profiled cylinder 38 relative relatively ensures the bearing block 93 and thus a pre-centering of the latching opening 123 for latching pin 121st

p0020FIGS. 7 to 10 show details of the illustrated reference to FIGS. 1 to 5 overload clutch 55.

p0021The overload clutch 55 is formed as a locking clutch, and coupling the gear 53 with the on a common axis 145 relative to the gear 53 rotatable pinion 57. On the side facing the pinion gear 57 side of the gear 53 is seated in an the axis 145 enclosing cavity 147 radial to the axis 145 slidably guided a slider 149 with an axially to the pinion 57 towards cranked, radially to the axis 145 projecting towards locking projection 151. the locking protrusion 151 overlaps with the periphery of a circular disk 153, the rotationally fixed pin 154 is connected to the pinion 57 and the slider 149 in the recess 147 axially fixed. The circular disk 153 has a locking recess 155 into which the latching projection 151 engages the slide 149 is biased by a spring 157 on its periphery. The projection 151 and the recess 155 have seen circumferentially slanted edges, so that is the gear 53 to the pinion 57 coupling projection 151 at a predetermined torque is exceeded lifted against the force of the spring 157 from the recess 155 and the overload clutch triggers. FIGS. 7 and 8 show the latched overload clutch, while the triggered state is shown in FIGS. 9 and 10.

p0022As Figs. 7 and 9 show further, the slider 149 has a slot 159 through which the shaft 145 passes. The projection 151 is bent out from the interior of the elongated hole to the pinion 57, while the projection 151 diametrically opposite to a tab 161 is bent into a radially extending chamber 163 of the gear 53rd The chamber 163 containing the spring 157 which is supported between the flap 161 and the axis 145 adjacent end wall of the chamber 163rd The overload clutch 55 is relatively easy to install and requires only a few parts.

p0023Figs. 11 and 12 show a variant of a profile cylinder attachment that can be used instead of the profile cylinder attachment of Fig. 6 in a door lock in FIG. 1. The door lock in turn comprising a polymer formed from side walls 201, 203 and a faceplate 205 lock housing 207, which has in its side walls 201, 203 complementary to the profile shape of the profile cylinder 209 shaped to receive a provided with an electronic reading device profile cylinder 209 insertion 211th To connect the reader of the castle, not shown with a likewise not shown control and the associated drive parts of the castle along the profile cylinder are in one extending transversely several pins 215 mechanically protected by this projecting web 213 of the profile cylinder and electrically insulated in a depression 217 of the web 213 housed. The connector pins 215 are sockets 219 associated, in turn, isolated on a displaceable in the insertion direction of the connector pins 215 sled 221 are maintained. The carriage 221 is in turn mounted on two bolts 223, the spaced 215 extend parallel to each other and spaced in the insertion direction of the plug pins and are in the profile cylinder 209 opposite side of the carriage 221 guided in a fixed to the lock housing 207 bearing block 225th The bolts 223 pass through the carriage 221 and are facing on the profile cylinder 209 side facing in the sliding direction of the carriage 221 via the jacks 219th The sections on the carriage 221 for profile cylinder 209 projecting towards forming detent pin 227, which are associated with 229 in the web 213 of the profile cylinder locking holes. The detent pin 227 engage the locking holes 229 and direct the web 213 relative to the carriage 221 from before the connector pins 215 retract into the sockets 219th In this way, damage to the connector contacts are normally despite the slight play of the profile cylinder 209 in the insertion openings 211 reliably avoided. preventing the bolt 223, as they are performed over a considerable length in the bearing block 225, certain violent pulling the profile cylinder 209. To move the carriage 221 in the bearing block 225 is accessible from the faceplate 205 forth screw 231 is rotatable, but by means of a locking pin 233 fixed axially mounted. The screw 231 engages in the manner of a spindle drive in a screw hole of the carriage 221. The carriage 221 can be driven by means of the screw 231 of the faceplate 205 forth against the web 213 of the profile cylinder. A provided on the carriage 221 stop surface 235 clamps the profile cylinder against the edges of the insertion but 211. The holding force need not be particularly great, since the profile cylinder 209 secured by bolts 223 to extraction from the insertion 211th

p0024In a not shown advantageous variant, the above-mentioned profile cylinder fastening elongated guide cheeks are on the detent pin 227 opposite side of the carriage 221 formed in one piece instead of the pin 223 in the direction of displacement. The guide cheeks are guided in grooves of the bearing block 225 and close the bracket bifurcated between them.