FI79170C - Arrangement at a door lock. - Google Patents

Description

79170

DOOR LOCK ARRANGEMENT - ARRANGEMANG VID ETT DÖRRLAS

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

One problem with door locks, in which different actuators can be mounted on the drive shaft 5 to move the inclined roller to the lock body, is the spring forces associated with the use of such actuators and the operation of the lock and the variations in their need. First, spring force is required to return the diagonal bar from the retracted position 10 to the protruding position. If a torsion knob is mounted on the operating shaft, the mass of which is usually not considerable, a relatively small spring force is sufficient to restore the torsion knob and the weight cam it uses. If, on the other hand, a button is mounted on the drive shaft which is considerably larger in mass and torque applied to the weight cam 15 than the torque knob, a substantially greater spring force is required in the lock to return the button to the horizontal position and hold the button in this position. For this purpose, the lock body is equipped with 20 additional springs. If such a door lock is to be used as a universal lock, the lock body should be opened and the above-mentioned additional spring removed in the event that a knob is to be used instead of a button. Otherwise, turning the crank would require a considerable 25 turns and would be difficult, especially for children and the disabled. For this reason, two types of lock frames have been used: for pushbutton operation with an additional spring and without an additional spring for torsion knob operation.

The object of the invention is to eliminate the above-mentioned problem 30 and to provide a general lock body which is equally suitable for both push-button operation and rotary knob operation. It is also an object of the invention to provide a solution with an advantageous structure and manufacturing cost, in which the 2 79170 actuator can be replaced by another type of actuator without having to remove the lock body from the door and open it to match the spring forces described above.

The objects of the invention are achieved as specified in claim 1 and in the subclaims. Thus, according to the invention, the spring of the button can, on the other hand, be activated by supporting it pre-tensioned on the weight cam or passivated by moving it away from said pre-tensioned position. These operations can be performed from the outside of the lock body 10 through an opening made in the lock body while the actuator mounted on the rear shaft of the lock action is removed and replaced with another type of actuator, for example a button on a rotary knob or vice versa. Thus, the lock body works properly with different types of actuators and does not need to be removed from the door or opened when the actuator is replaced.

In practice, the press cam is provided with a stop for said spring which is open in the direction of increasing the tension of the spring and allows the spring head to be moved to a supported position 20 and detached from this position to a free position through an opening in the lock body without opening the lock body. It is advantageous to provide a response to the lock body to guide the spring in its untensioned position so that the spring remains at said opening in the lock body. The spring itself may advantageously be a coil spring and mounted on the operating axis of the weight cam around a rotating guide part.

If the inclined roller returning transmission means comprise a separate guide element rotatably supported on the lock body, the inclined roller returning spring means can advantageously be arranged by means of said control element 30 to also act on the weight cam to return it to the protruding position.

The invention will now be described in more detail with reference to the accompanying drawing, in which

II

3,791,70 Fig. 1 shows an arrangement according to the invention with the lock body open and a button spring in its prestressed position, Fig. 2 shows the case of Fig. 1 with the lock body closed, Fig. 3 shows an arrangement according to the invention with the lock body open and a button spring in its free, prestressed position.

In the drawing, reference numeral 1 denotes a lock body with an oblique bar 2. A push cam 10 7 is mounted on the drive shaft 6, which can be turned by an actuator mounted on the drive shaft 6, for example a button or a knob (not shown in the figures). The push cam 7 rotates the guide element 3 around the pin 4 and the movements of the guide element 3 are further arranged to cause the movement movements of the inclined roller 2. The spring 5 takes care of returning the inclined roller 2 to the basic position of the ejection. The lock body may, of course, have another operating shaft symmetrically with respect to the inclined roller, which is provided with a similar transmission mechanism for transmitting the force from one of the desired 20, for example a key-operated actuator to the inclined roller. However, this is not shown in the figures because it is not actually related to the present invention.

The lock body is also provided with a spring 8 mounted around the guide part 7a 25 on the operating shaft of the weight cam 7. If a button is to be mounted on the actuating shaft 6, the spring 8 is mounted as shown in Figures 1 and 2 so that its other end is prestressedly supported on a stop 9 attached to the cam 7. The spring 8 then returns the button 30 after retracting the oblique roller. in the horizontal position of the button. If, on the other hand, it is desired to use a torsion knob instead of a button, the end of the spring 8 is moved through the opening 11 in the lock body by a suitable tool out of the stop 9 to the bias-35 position shown in Fig. 3.

Claims (6)

A door-reading arrangement, the reading body (1) comprising a piston (2) movable between a protrusion and a retracted position, at least one functional shaft (6) provided with a rudder (7), which likes to arrange a rudder (7) actuating function means, for example a push or a knob, means (3) for transmitting force from said rudder (7) to the drop piston (2) for moving the fall piston (2) to its retracted position, spring means (5) arranged returning the fall piston (2) to its protruding position and further arranged to actuate the rudder (7), and a separate spring (8) arranged by means of the rudder (7) to actuate the function means for displacement (6). of the operating means to a position corresponding to the protruding position of the piston, characterized in that the other end of said spring is releasably supported against the rudder (7), so that the spring (8) is biased in its supported position and the reading body (1) at the position of 20 f the spring (8) is provided with an opening (11) from which said spring (8) is movable from its biased position towards the rudder (7) into a free, non-biased position, in which it does not affect the rudder (7) . Door lock arrangement according to claim 1, characterized in that the rudder (7) is provided with a pouring means (9) for said spring, which is open in a direction which increases the tension of the spring (8) and allows movement of the spring (8). all the way to said supported position and release from said supported position into said free position through the opening (11) made in said reading body 30 without opening of the reading body (1). Door lock arrangement according to claim 1 or 2, characterized in that the reading body (1) comprises a motor member (10) which controls said spring (8) in its un-biased position, so that the spring (8) is poured at the position of the body. nämdna