SK286469B6 - Lock with a latch bolt protruding from the lock housing - Google Patents

Abstract

The present invention relates to a lock (1) with a latch bolt (9), which protrudes from the lock housing (2). A pull rod (8) of the latch bolt (9), which is slidably guided in the housing (2), can be pulled back through the action of an arm (20) of a spring-mounted pusher nut (21). A pusher nut (21) extension engages with a projection of said pull rod (8). The latch bolt (9) pull rod (8) comprises a driving projection (19) being fixedly coupled therewith and engaging with the pusher nut (21) arm (20). The driving projection (19) has a skew extending sliding surface (23) for engagement with a projection (20') of the arm (20). The pusher nut (21) arm (20) is held by a spring (35) in position extending parallel to the direction of the pull rod (8) displacement. The force of the spring (35) acting on the pusher nut (21) is adjustable by adjusting engagement point (P) of the spring (35) arranged fixedly on the lock housing (2).

Description

Technical field

BACKGROUND OF THE INVENTION The invention relates to a lock having a bolt protruding from the lock sleeve, in which the draw bar guided in the lock sleeve is retractable by means of a nut back into the lock sleeve, the nut extension engaging the projection of the draw bar.

BACKGROUND OF THE INVENTION

In a lock of this kind, known from DE C 32 52 85, a nut is formed by a knob of a crank with which a lifting thumb is connected to rotate together which acts on a flap extending from the lock bolt. The nut reversible setting is not adjusted. This known lock uses two cylinders, one of which can be locked from the inside and the other from the outside of the door. Furthermore, a sluice with recesses for displacement is known, wherein in the region of each cylinder there are two engagement points or two locking lugs, respectively cooperating with the sluice, on the bar of the bolt. The crank knob can only be operated from the inside of the door. The door knob only allows the bolt to be retracted from its normal position when the bolt is not locked into the locking position.

A lock of this type is known on the market as a glass door lock. The bolt rod is mounted on a pivot, extending from the rear of the sluice, which extends into the engagement opening of the bolt rod and which, with its angled ends, protrudes into the moving region of the crank nut.

The sluice is provided with a locking projection which is located before or after the stop of the closure body according to the position of the bolt. The adjustment of the bolt by means of the crank nut in this embodiment is carried out by means of a sluice.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a lock of the type mentioned at the outset, the realization of which would be achieved by simple technical and cost-effective means.

The object of the invention is to provide a latch with a bolt protruding from the latch housing, in which the rod is slidably guided in the latch housing by means of a nut retractable into the latch housing; coupled to the nut arm, the drive tab having an inclined sliding surface to engage the shoulder tab, the nut arm being held by a spring in an orientation extending parallel to the direction of travel of the rod, and wherein the spring-springing force is adjustable by adjusting the engagement point of the spring arranged firmly on the lock sleeve.

The result of this embodiment is a lock of this kind, which, in addition to its simple design, is also characterized by an advantageous technical embodiment in terms of locking.

An advantageous technical embodiment in terms of locking consists in that the bolt rod comprises a fixed engagement projection on which a sloping running surface is formed to engage the projection of the crank arm arm. As a result, the same lever ratios still exist when the bolt is retracted using the crank nut. Since the crank nut arm is held by the spring in parallel alignment with the direction of travel of the bolt, the crank nut can directly enter an operative connection with the driver lug as it rotates.

In order to solve the task of the invention, it is furthermore provided that the spring-spring-force of the nut is adjustable. On the basis of this embodiment, a crank or crank nut or a rotary knob can be assigned. If the crank nut is equipped with a crank, there is a larger lever arm, so that more spring force is required. If, on the other hand, a rotary knob is used, the spring force can then be adjusted to a smaller value, so that a slight locking rotation of the rotary knob is still possible. In addition, the spring engagement point fixedly on the lock sleeve is adjustable, which can preferably be done on the outside of the lock sleeve. According to another embodiment, the spring is a tension spring engaging the nut arm. In this case, the engagement point of the spring, fixedly on the lock housing, is formed by a pin adjustable in the lock housing. This pin is preferably displaceable between two positions in the longitudinal slot for varying the spring force. In detail, this is done so that the pin is fastened with a bayonet lock in one of its two end positions. For this purpose, the pin on the end side always has opposing faces which in one position in the slot sections of the slots arranged in the lock cover and bottom run parallel to the walls of the slots and in the other position are arranged in an enlarged slot section with an enlarged cross section. In order to change the force of the spring, it is therefore necessary to make only one rotation of the pin so that the tabs are brought into alignment against the walls of the slot. For this purpose, the peg is adjustable by 90 °. To this end, it has an opening for engaging the tool on its front side. This opening may be formed, for example, in the form of a slot, in order, for example, to engage the front of the screwdriver. The automatic adjustment of the pin is prevented by the fact that the enlarged section forms the abutment surfaces for the flat abutment of the edge portions of the pads. The advantages in terms of guidance arise from the fact that the bolt rod is guided between the two side walls of the lock sleeve and bears on them and is spring-loaded in the extension direction by the tension spring. Yet another advantageous feature of the invention is finally that the nut comprises a forked recess defining free movement and surrounds the stop pin on the closed side of the lock housing.

The drawbar is retractable and retractable again by means of a key lock, by means of a key, lock cylinder, second nut or the like, after having previously lifted the sluice, and the tooth-liftable sluice is designed as a single-arm lever equipped with recesses pin, which is located on the pin located above the head of the barrier.

The sluice is mounted on the bolt rod around a stationary bolt arranged firmly on the lock sleeve above the bolt head. Thus, the forces exerted on the bolt head when it is extended are now transmitted directly to the sluice by means of a bolt, thereby absorbing large return forces without any damage. The extension or retraction of the bolt prevents the tumbler from being lifted and the pin released so that the bolt is adjustable to the extended position by the tooth of the lock cylinder on the bolt rod. This assumes that the recess is formed at the free end of the sluice, which has the shape of a single-arm lever, the engagement point of the tooth of the lock insert being located approximately in the center thereof. As a result of this embodiment, the advantageous action of the single-arm lever and the associated soft closing method are achieved. The one-arm sluice lever therefore assumes its prescribed end position as required. On the one hand, it allows deflection of the bolt when retracting doors equipped with this lock, and on the other hand, the single-arm sluice lock lever locks the bolt back when the bolt is locked.

The sluice is not operated by the crank nut. When the bolt is unlocked, the drive lug extends in the crank nut arm. When the bolt is locked, the crank nut rotates at idle. At the end of the spring-loaded end, the drive tab still carries the crank nut arm, so that this is constantly returned to its starting position.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is further elucidated by means of several exemplary embodiments shown in the drawings. They show:

Fig. 1 shows a lock according to a first exemplary embodiment, in which the bolt is displaceable not only by means of a crank but also by means of a lock cylinder.

Fig. 2 is a view of the lock of FIG. 1 with the cover cap removed showing the position in which the bolt can be retracted by means of the crank nut.

Fig. 3 shows the lock according to FIG. 2, in which the bolt is gradually pulled into the lock sleeve by means of a crank nut.

Fig. 4 shows a comparable embodiment of the lock according to FIG. 2, but with the latch extended.

Fig. 5 shows a comparable embodiment of the lock according to FIG. 2, in which the spring force is set to a smaller value on the cranks.

Fig. 6 shows a section along line VI-VI in FIG. 1, shown on an enlarged scale.

Fig. 7 shows a detailed illustration of the barrier.

Fig. 8 is a top view of the bolt of FIG. 7th

Fig. 9 shows a view of the holding lever.

Fig. 10 is a top view of the retaining lever of FIG. 9th

Fig. 11 is a view of the lock according to the second exemplary embodiment with the cover cap opened, with the bolt in the normal position, the bolt being displaceable by means of the second nut.

Fig. 12 shows the lock of FIG. 11, in which the bolt is loaded inside the lock housing by the crank nut.

Fig. 13 shows the lock of FIG. 11 with the bolt extended.

Fig. 14 shows the lock of FIG. 11, in contrast to which a torsion spring is applied to the crank nut with less force.

DETAILED DESCRIPTION OF THE INVENTION

The lock 1 according to the first exemplary embodiment consists of a lock sleeve 2 with a longitudinal basic contour, the length of the lock sleeve 2 being approximately twice its width. From the bottom 3 of the lock housing 2, two longitudinal side walls 4, 5, which are connected to each other in an arch with a curved rear wall 6, extend perpendicularly upwards. The front wall 7 of the lock housing 2 has a right angle with the side walls 4, 5.

In the lock housing 2, between the two side walls 4, 5, a rod 8 of a bolt 9 is guided, which passes through a passage 11 formed in the front wall 7, whose head 10 is provided with a chamfer 10 '. The rod 8 of the bolt 9 is in the form of a fork. A pin 12 protrudes from the shorter lower arm 8 'of the rod 8, on which one end of the tension spring 13 is attached. The other end of the tension spring 13 is attached to a pin 14 fixedly fixed to the bottom 3 of the lock sleeve 2. loaded by tension spring 13.

The length of the upper arm 8 'of the rod 8 corresponds approximately to three times the length of the lower arm 8'. An internal opening 15 is formed on the inside of the upper arm 8 ', to which a rectangular pin 16 is assigned in cross-section. Above the pin 16, a longitudinal slot 17 is formed at the end of the upper arm 8'. At the free end of the upper arm 8 'of the drawbar 8, there is provided a driving protrusion 19 which engages the crank nut 21, which is seated in the rear of the lock housing 2 between its bottom 3 and the locking cover 22 parallel to it. The drive protrusion 19 is provided with an inclined sliding surface 23 intended to engage a protrusion 20 'formed on the arm 20, the protrusion 20' in the basic position of the bolt 9 lying just below the driver protrusion 19 so as not to prevent the bolt from moving forward.

As shown in FIG. 2, the basic position of the bolt 9 is achieved by means of a holding lever 24 which is designed as a single-arm lever which, on its narrow side facing the rectangular pin 16, is provided with two consecutive recesses 25, 26 which are separated from each other by a central projection 27. In the basic position of the bolt 9, the central protrusion 27 is located in front of the rectangular pin 16, thus blocking the forward displacement of the bolt 9. Following the recess 26, an arcuate thrust 28 is formed on the retaining lever 24 and extends into the engagement opening 15. the closure force point is located approximately in the center of the single-arm lever forming the retaining lever 24. The other end of the retaining lever 24 is located above the head 10 of the bolt 9 and is rotatably mounted on a fixed pin 29 inside the lock sleeve 2. a curvature 30 is formed in which the retaining lever 24 is supported by a stop 31 located at the bottom 3 of the lock housing 2, whereby the retaining lever 24, supported by the pressure spring 32, is held in its initial position as shown in FIG. 2. The pressure spring 32 is supported on one side against the inner side of the side wall 4.

On the opposite side of the arm 20, the crank nut 21 has a forked recess 33 in which a stop pin 34 is attached to the bottom 3 of the lock sleeve 22. In the basic position of the lock 1, the crank nut 21 is in the position shown in FIG. 2, which is maintained by a spring 35, one end of which is attached to the pin-shaped projection 36 located on the arm 20. The other end of the spring 35 is firmly anchored at point P in the lock sleeve 2, point P is repositionable. As for the spring 35, it is a tension spring. The anchoring point P itself of the spring 35 is formed in the lock sleeve 2 by a displaceable pin 37 which is displaceable in two positions in the longitudinal slots 38 formed on the bottom 3 of the lock sleeve 2 and in the lock cover 2. The longitudinal slots 38 are located in the direction of the arm 20 . The longitudinal slots 38 are shaped such that the pin 37 is attached at one of its end positions by a bayonet lock. The pin 37 has opposing faces 39 formed on both sides. The distance between these faces 39 is slightly less than the distance of the mutually parallel walls 40 of the slot section 41 from the bottom 3 and the cover 22 of the lock housing 2. The slot section 41 is closer on the arm 20 as opposed extended section 42 of the longitudinal slot 38. The inner wall of the extended section 42 of the longitudinal slot 38 is adapted to the outer walls of the pin 37. If the pin 37 is inserted into the extended section 42 of the longitudinal slot 38 and in the direction transverse to the walls 40 of the slot section 41 as shown in FIG. 6, the spring force 35 increases.

In order to prevent the automatic adjustment of the pin 37, the extended section 42 of the longitudinal slot 38 forms on the bottom 3 and in the cover 22 of the lock sleeve 2 the abutment surfaces 43 which serve as abutment surfaces of the edge portions 39. These abutment surfaces 43 are transverse to the slotted walls 40. paragraph.

After rotation by 90, the pin 37 is adjustable to the position shown in FIG. 6 and in the position shown in FIG. 6, the spring 35 exerts less force on the nut 21 of the door handle 44. The lower spring force 35 is selected in the case that a knob (not shown in greater detail) is inserted in the nut 21 instead of the door handle 44. In the embodiment shown in FIG. 1, with dashed door handle 44 indicated, pin 37 is inserted in widened section 42 of longitudinal slot 38. In order to displace pin 37 from outside of lock 1, mounting holes 37 'are provided on the front sides of pin 37, e.g. a tool such as a screwdriver.

The bar 9 can be disengaged and retracted by means of a profile lock insert 45 passing through the bottom 3 and the cover 22 of the barrel 2, whose tooth 46 interacts with the retaining lever 24 and the engagement opening 15 of the bar 8 of the bar.

If, in the figures, the door equipped with the lock 1 is not closed in the closed position, the bolts 9 are retracted as a result of the chamfer 10 'inside the lock sleeve 2, the pin 16 moving in the recess 25. In the closed position shown in FIG. 2, then due to the force of the tension spring 13, the bolt 9 extends to the home position. From this basic position as shown in FIG. 3, the bolt 9 can be slid back into the lock housing 2 by means of the door handle 44. By pivoting the nut 21 through the two crank 44, the projection 20 'of the arm 20 acts on the sliding surface 23 of the rod 8 of the bolt 9. The rotation of the nut 21 is limited in that the arm 33 'abuts the stop pin 34 located in the lock sleeve 2. The spring 35 is tensioned. This also applies to the tension spring located at the bolt 9. If the door handle 44 is released, it returns The nut 21 returns to its starting position in which the second arm 33 'engages the stop pin 34 from the opposite side. The tension spring 13 then guides the bolt 9 to its initial position.

Only the closed door can be opened by means of the lock cylinder 45. When the tooth 46 of the lock cylinder 45 is rotated counterclockwise, the tooth 46 acts to amplify the holding lever 24, thereby lifting the holding lever 24 upward. The central projection 27 is thus located above the pin 16. By inserting the tooth 46 of the lock insert 45 into the engagement opening 15, the bolt 9 can be adjusted to the position shown in FIG. 4. When the tooth 46 of the lock insert 45 is rotated, the retaining lever 24 is freely deflected by the spring, so that its central protrusion 27 engages behind the pin 16 which is thus located in the recess 26. The bolt 9 can then not be retracted. Corresponding reaction forces are retained by the retaining lever 24 on a pin 29 mounted on the bottom 3 of the lock sleeve. Returning of the bolt 9 can only be carried out by means of a key, that is, after previously holding the holding lever 24 and adjusting the bolt 9 against the force of the tension spring 13.

If, instead of the door handle 44, a knob (not shown) is used, the spring force acting on the nut 21 is reduced, with the pin 37 being set in the position shown in FIG. 5th

In the position when the bolt 9 is extended, the drive protrusion 19 is located outside the path of movement of the arm 20 of the nut 21, so that by adjusting the nut 21, or by means of the knob or door handle 44, it does not engage the rod 8 of the bolt 9.

Further exemplary embodiments shown in FIG. 11 to 14 essentially correspond to a first exemplary embodiment. The same components are therefore designated with the same reference numerals. The deviation in this embodiment is that instead of the profile lock cylinder 45, a second nut 47 is inserted between the bottom 3 and the cover 22 of the lock housing 2. A lock 1 'of this type can be used, for example, in a toilet door. The second nut 47 is provided with a protrusion 48, which acts similar to the tooth 46 of the lock cylinder 45. The movement of the protrusion 48 is limited by two stops 56 and 57 located in the lock housing 2. In this lock 1 ', Knob (not shown). As shown in FIG. 12, the bolt 9 can thus be drawn back into the lock housing 2 by means of a nut 21, as in the first exemplary embodiment. As further shown in FIG. 13, the bolt 9 can be disengaged by means of a second nut 47 provided with a rotary knob on the inside of the door, the projection 48 interacting not only with the retaining lever 24 but also with the bolt rod 8

9. The opening of the locked door therefore requires that the bolt 9 is first pulled back into the lock housing 2 by means of a second nut 47 provided with a rotary knob, and then completely retracted by the nut 21.

If the nut 21 is equipped with a door handle 44, then the pin 37 assumes the position shown in FIG. 11 to 13. When using the rotary knob, the pin 37 is set to the position shown in FIG. 14th

Another exemplary embodiment essentially corresponds to the first exemplary embodiment. Instead of the profile lock cylinder 45, however, a key insertion hole is formed on the bottom 3 and in the cover 22 of the lock cylinder 2, by means of which the lock equipped with the holding lever can be locked.

Claims (11)

PATENT CLAIMS Lock (1, 1 ') with a bolt (9) protruding from the lock sleeve (2), in which the sliding guide (8) in the lock sleeve (2) is retractable by means of a nut (21, 47) into the lock sleeve (2) wherein the nut extension (21, 47) engages the projection of the rod (8), characterized in that the rod (8) of the bolt (9) comprises a driver protrusion (19) firmly connected thereto, with which the arm (20) engages a nut (21, 47), the drive protrusion (19) having a sloping running surface (23) for engaging a protrusion (20 ') of the arm (20), the nut (21,47) being held by a spring (35) ) in an orientation running parallel to the displacement direction of the rod (8), and wherein the spring force (35) springing the nut (21, 47) is adjustable by adjusting the engagement point (P) of the spring (35 fixedly on the lock sleeve (2). Lock according to claim 1, characterized in that the spring (35) is a tension spring which engages the arm (20). Lock according to claim 1 and 2, characterized in that the engagement point (P) of the spring (35) fixed to the lock housing (2) is formed by a pin (37) displaceable in the lock housing (2). with Lock according to one or more of the preceding claims, characterized in that the pin (37) is adjustable between two positions in the longitudinal slot (38). Lock according to one or more of the preceding claims, characterized in that the plug (37) is fastened with a bayonet lock in one of its two end positions. Lock according to one or more of the preceding claims, characterized in that the the pin (37) always has opposing faces (39) at the end, which in one position in the slot sections (41) of the slots (38) arranged in the lock housing (22, 22 ') and the bottom (3) run parallel to the walls (40). 1, and in the second position they are arranged in an enlarged section (42) of the slots (38) with an enlarged cross-section transversely to the walls (40) of the slots (38). Lock according to one or more of the preceding claims, characterized in that the enlarged section (42) forms abutment surfaces (43) for abutting the edge portions of the flats (39). Lock according to one or more of the preceding claims, characterized in that the nut (21) comprises a fork recess (33) defining free movement and surrounds the stop pin (34) on the closed side of the lock housing (2). Lock according to one or more of the preceding claims, characterized in that the rod (8) is, by means of the arm (20), a locking control by means of a key, a lock cylinder (45), a second nut (47) or the like. 24) retractable and retractable, wherein the tooth (46) of the liftable sluice (24) is formed as a single-arm lever, which is provided with recesses (25, 26) into which a rectangular pin (8) extends from the rod (8) 16), which is mounted on a pin (29) located above the head (10) of the bolt (9). Lock according to claim 9, characterized in that the recesses (25, 26) are located at the free end of the sluice (24) and the engagement point of the tooth (46) lies substantially in the center thereof. Lock according to one or more of the preceding claims, characterized in that the rod (8) is guided between the two side walls (4, 5) of the lock sleeve (2) and bears on them and the tension spring (13, 13 ') is cushioned to extend direction.