SU1612070A1 - Door latch - Google Patents

Abstract

The invention relates to key fasteners, can be used for locking from the inside of residential and office premises and allows improving operating conditions and increasing reliability of operation. The door latch includes a housing and two handles mounted on the rods, two sockets for fastening, a spring-loaded bolt with a bevel, on the side surface interacting with the stem of the inner handle and with a cam located on the stem of the inner handle. The rods are connected by a clutch mechanism made in the form of two coupling halves located at the ends of the rods, the outer coupling half being made in the form of a sleeve with a socket and a pointed tooth made at the end of the sleeve. The inner coupling half is made in the form of a rod for placing in the sleeve cavity an external coupling half carrying a pointed protrusion symmetrical with respect to its longitudinal axis for placement in the sleeve socket. 1 hp f-ly, 12 ill.

Description

The invention relates to key-lock products and can be used for locking from inside residential and office spaces.

The aim of the invention is to improve the operating conditions and increase the reliability of operation.

FIG. Figure 1 shows the door latch assembly; in fig. 2 is a section A-A in FIG. one; in fig. 3 - elements of the clutch mechanism; in fig. 4 is a view B in FIG. 3; in fig. 5 - outer half coupling with one protrusion and a socket in the form of a key groove; in fig. 6 is a view of B in FIG. five; in fig. 7 - outer half coupling with four protrusions and slots in the form of slotted grooves; in fig. 8 is a view of FIG. 7; in fig. 9 - inner half coupling with one lug; in fig. 10 is a view of D in FIG. 9; in fig. 11 - internal half coupling with slots forming protrusions; in fig. 12 is a view E of FIG. P..

The latch door consists of a housing 1 in which a bolt 2 is placed, a bolt head 3 and a locking screw 4, a spring 5, a cam 6 through which a square section passes a rod 7 with a flange 8 interacting with a bevel 9 a bolt 2. On the rod 7 by means of an adjusting screw 10 and linch pin 11 are fixed inside handle 12 with annular grooves 13 for a ball lock 14 placed in the housing of the socket 15 fixed on the door with pins 16. The rod 7 has an internal coupling half 17 at the end consisting of a rod 18 and. a pointed protrusion 19 symmetric about its longitudinal axis and coupled with an external coupling half 20 made in the form of a sleeve with a socket in the form of a square hole 21 and an end face bearing at least one symmetrical pointed protrusion 22 whose apex 23 is located in the center of the face of the socket 21, and the base 24 is connected to rebO

Yu

about

IjiaMH 25 sockets 21. Square 26 ({section is located in a square hole; b external handle 28, having a central opening 29 for emergency opening of the door and rotor Brush 30 and shreds 16. The cam 6, through a square hole 31 which holds the rod 7, has two arms 32, interacting with the stops 33 of the crossbar 2. I The latch works as follows: I Rotate the handles of the inner 12 or outer 28, when the inner (female 111) half coupling 17 and outer (covering ) the half coupling 20 is engaged, causes the cam 6 to rotate, which is mounted on a multifaceted (square) rod 7 of the inner handle 12, while one of the two arms 32 of the cam 6 acts on one of the stops 33 of the crossbar 2 and moves the bolt into the 1: 1 cradle of the housing. This bolt will move the caster's jester 1 both when it is rotated clockwise and when rotated in the opposite direction, allowing the latch on the door to be t both left and right hinges. {In order to ensure the locking of the doors, which are both opening inwards and outwards, the head 3 of the crossbar 2 must be set to the desired position. To do this, unscrew the fastening screw 4, pull out the guide 3 and, turning it over 180 °, put it back in place and fasten it with the screw 4. | In FIG. 1 head 3 is set to position when the door opens inwards. The door locks when the inner handle 12 is axially moved outwards, while the rod 7 of the inner handle and the inner half coupling 17, which is made at its end, moves, comes out of engagement with the outer coupling half 20. This: causes the external the handle 28 cannot transfer the rotation to the cam 6, which moves the dead bolt 2. With the inside handle 12 it is possible to unlock the door at any axial position of this handle. If unlocking is performed by the inner handle 12 when it is extended, then it is simultaneously axially moving inwards (to the rod engaging position), since, moving inside the housing 1, the bolt 2, with its bevel 9, acts on the flange 8 of the stem 7 of the inner handle 12 and moves it to the position of engagement with the stem 26 of the outer handle 28. In this case, if the shape of the rod 18 of the inner half of the coupling 16 does not coincide with the shape of the socket 21 of the outer coupling half 20, then the latter rotates under the influence of moments from the forces, 1I1; who were affected Wii rod 19 of the inner coupling half 17 on the protrusions 22 of the inner coupling half 20. The maximum angle of rotation of the alignment of the external handle 28

will depend on the variant of the coupling mechanism, it can be determined by the formula.

F

1 ch.

0

5 Q 5 25 30 35 40 45

50

55

where n is the number of protrusions of the outer half-coupling.

When performing coupling halves 17 and 20 of the clutch mechanism, the orienting rotation of the outer handle while simultaneously coupling the rods results in any movement of the bolt 2 inside the housing 1, for example, when the door is slammed, when a person accidentally puts the inner handle in the position when the rods are disengaged and closes the door. If the door is locked from the inside by a child who cannot open it himself, the possibility of an emergency opening of the door is provided. To do this, you need to insert any rod under your hands (nail, pin, piece of wire, etc.) into the central hole 29 of the outer handle 28, axially move the rod 28 to engage the rod 7 and open the door by turning the outer handle 28 When moving the bolt 2, the bevel 9, acting on the flange 8, will return both the rod 7 and the rod 26 to the initial position, the further operation of the latch will remain unchanged.

To install the latch on the door, the body 1 is first installed, then from the side of the external handle, the rod 7 is installed in the square hole 31 of the cam 6, the socket is screwed to the door 15 with screws 16 so that the rod 7 is in the center of the hole 34, then the inner handle 12 is mounted on it and secured with an adjusting screw 10, which is screwed into the threaded hole 34 of the stem 7 until the flange 8 of the stem 7 rests against the base of the bevel 9 and the crossbar 2, while the ball 14 must be in the annular groove 13 fixing the position in which locking the door. Then, the adjusting screw 10 is locked with a cotter pin 11. Thereafter, the coupling half 17 of the stem 7 is attached to the half coupling 20 of the stem 26, after which an external handle 28 is mounted on the stem 26, which is fastened (rotatably) to the door with the socket 30 and screws 16. The length of the rods 7 and 26, as well as the length of the threaded hole 34 and the length of the threaded end of the adjusting screw 10, are chosen within such limits that the installation of the latch for different door thickness is easy.

When executing the coupling mechanism, the outer half coupling can be made in the form of a sleeve with keyed sockets (Fig. 5 and 6) or with p-slotted grooves (Fig. 7 and 8) and with an end face, having respectively one or n protrusions, the bases of which will converge the center of the corresponding grooves, and the inner coupling can be made in the form of a round shaft with one pointed protrusion (Fig. 9 and 10) or in the form of a splined shaft with pointed ends of the splines (Fig. 11 and 12). In such an embodiment, the coupling mechanism of the socket of the external coupling and the protrusion (pin, spline tooth) will serve as torque transmitting elements, and the protrusions of the end of the external coupling and the pointed ends of the teeth of the internal coupling serve for automatic coupling of the mentioned elements of the external and internal coupling transmitting torque, with axial coupling coupling, when their geometrical axes coincide.

The possibility of unlocking and locking the latches with one hand, automatic activation of the external handle when moving, the bolt inside the case, greater adaptability of the catch on the doors of any varieties, the relative simplicity of the design make the latch reliable and easy to use.

Claims (2)

1. A door latch comprising a housing mounted in the housing a spring-loaded bolt with a bevel on the side surface, means for moving the bolt including rods mounted with the possibility of longitudinal movement relative to each other, carrying the inner and outer handles and interconnected by a clutch mechanism, vypatneinym in the form of two coupling halves attached to the ends of the rods facing each other, each of which is equipped with at least one symmetrical relative to its longitudinal axis, pointed protrusion, and placed on the inner stem handles cam for interacting with bevel bolt, characterized in that, in order to improve operating conditions and increase reliability of operation, the coupling half of the outer handle rod is made in the form of a sleeve that has at least one slot 5 for moving the protrusion of the half-coupling of the inner handle shaft; the coupling half of the inner handle stem is a rod for placing in the sleeve cavity, and the half-coupling protrusion of the outer handle stem is made on the end of the sleeve, and the inner handle stem is installed with longitudinal displacement . 2. A latch according to claim 1, characterized in that it is provided with a means for adjusting the coupling mechanism, formed by 5 central coaxial holes for the adjusting screw, made in the stem of the inner handle and its corresponding handle, and fixed on the outer end surface of the inner handle An axial stem is an annular collar, in the walls 30 of which coaxial holes for the pin are made to fix the handle relative to the stem. 55 52 2 8 22 22 23.21 J9 I I / 5 FZ 5 R Phi $ 7 See five Phi2. In id Phage.6 Phi5.8 BUT FIG. 9 Fig.71 VidM & id FIG. W FIG. L