ES2324383B1 - REVERSIBLE PICAPORT DEVICE FOR LOCKS. - Google Patents

Abstract

Reversible latch device for locks, consisting of a helical compression spring conical (2) that is mounted on the tail (1a) of the latch (1) of so that its front end is the one with the largest diameter and is applied against the rear face of the radial arm (3a) of the grimace (3), while its rear end has sliding adjustment with respect to the diameter of the tail (1a) of the latch (1) and is applied against the front face of a crossbar (4) which, with possibility of free rotation, is coupled in a channel (1b) of the tail (1a) of the latch (1) and its rear face is applied against the front end of a compression coil spring cylindrical (5) that has its rear end applied against the box (6) of the lock and that its working voltage is less than that of the conical compression coil spring (2).

Description

Reversible latch device for locks

Field of the Invention

This invention concerns a device of lock latch, among which are those that are recessed in the thickness of the edge of a door.

More particularly it refers to a handle which is equipped with the reversibility function, which allows it to be valid for both right and opening doors to left as well as this reversibility function can be practiced with the lock mounted and even installed in the door.

Prior art

In this field a known and typical constitution it consists of using two helical springs, both cylindrical, of different work tensions, a weaker one that is compressed when the latch is retracted in normal operation, and another strong that stays rigid during this normal operation, but that, under an extra push in the direction of exit of the doorknob, it is compressed enough to make the head of the latch protrudes completely from the front of the lock, moment in which it is turned half a turn and, ceasing such a push extra, said head returns to the axial resting position original, but with the bezel facing away from the previous. In this constitution the weak spring is between a fixed washer just behind the doorknob head and a first sliding washer that is applied on the front side of a fixed stop to the lock box; and the strong spring is between a second sliding washer that stops forward with the nut and a third sliding washer that makes a backstop against fins pulled by riveting the doorknob's tail at its rear end; latch retraction is driven by a radial arm of the nut applied against the second washer slider on the other hand, the doorknob tail slides adjusted to through the fixed stop, which can also be considered as a washer anchored in the lock box.

Explanation of the invention and advantages

Faced with this state of affairs, the present object of the invention is a reversible latch for locks consisting of a conical compression helical spring that is mounted on the doorknob's tail so that its front end It is the one with the largest diameter and is applied against the rear face of the radial arm of the nut, while its rear end has sliding adjustment with respect to the diameter of the doorknob tail and is applied against the front face of a crossbar that, with possibility of free rotation, is coupled in a channel of said tail of the latch and that on its rear face is applied against the front end of a cylindrical compression coil spring which has its rear end applied against the case of the lock and that its working voltage is conveniently less than that of the conical compression helical spring and suitable for necessary for normal operation of retracting the latch.

It is observed that in this constitution the spring strong, to which the reversibility function is entrusted, is the only one that is properly mounted on the doorknob's tail, while the weak spring, which is the one that operates in the normal latch operation, is mounted externally to the tail of the same and drives it by its rear end; which represents a radically different conception from the one described as known, in which both strong and weak springs are mounted on the tail of the handle and are cylindrical. Precisely the new constitution is made possible by the use of a coil spring strong that, due to its conical shape, allows a mounting in which, during normal operation of retracting the latch, it serves rigid support to the radial arm of the nut replacing the second sliding washer of the constitution described above as conventional, in addition to making the fixed stop and the first sliding washer arranged so far between the end weak spring rear and this fixed stop. On the other hand, the weak coil spring placement (which governs retraction normal latch) pushing the tail behind, but external to it also allows the third sliding washer to be suppressed and the rivet that generates the fins of the rear end of the tail of the latch for the retention of this third washer slider

In return, the new constitution incorporates a crossbar that by mere assembly is placed in the practiced channel on the doorknob's tail and on its opposite faces it provides support to the coil springs strong (reversibility) and weak (retraction). This avoids the placement of the third sliding washer and riveting operation of the tail of the latch to achieve the retention of it in this tail. further assembly is now much simpler and faster, since it is enough with slide the conical (strong) spring along the tail of the latch until it is in front of the channel, then assemble the crossbar by simply inserting into the channel and placing this set in the lock case while the spring weak helical is located between the crossbar and the wall of the lock case; which contrasts with the type of device known before described that, in addition to the use of more elements, requires a more complex assembly and a greater number of operations.

On the other hand, the recommended constitution makes it possible to make the doorknob's tail more robust, since now all the part of it that lies ahead of the radial arm of the nut is completely free and can be thickened for convenience for the proposed purpose; until now, in that area the weak cylindrical spring that was compressed for normal operating retraction of the latch.

Another feature of the invention consists in that, seen laterally the latch from front to back, the crossbar presents a "C" shaped profile with straight sides slightly lower than the gap between box and lock cover which determines paths upper and lower wings parallel to each other and that form a square with a central body that is perpendicular to the  tail of the latch and that has a neckline that has adjustment sliding with respect to the bottom of said channel of this tail and that open up to the lower wing of the "C" profile.

Drawings and references

To better understand the nature of the invention, an embodiment is shown in the attached drawings industrial that is merely illustrative and not limitative.

Figure 1 shows in side elevation a latch (1) according to the invention, which is installed in the position of resting in a lock box (6) that is represented only in the part concerned by the invention and having the side of the observer side. In this figure a detail of the section indicated in the side view; next to it the end of the doorknob's tail where the channel (1b).

Figure 2 is an exploded view of a profile elevation in which the latch (1), the spring appear conical compression helical (2) and crossbar (4), all of them according to the detail section of figure 1.

Figure 3 is an exploded view equivalent to figure 2, but in perspective.

Figure 4 is like the main view of the Figure 1, but with the handle (1) in the pop-up position to its reversibility.

Figure 5 is section V-V of Figure 4, equivalent to that of the detail of Figure 1, but for the emerging reversibility position

Figures 6 and 7 are respectively equivalent to figures 4 and 5, but referred to the position of operating retraction of the latch (1).

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In these figures the following are indicated references:

one.-

Latch

1st.-

Doorknob Queue (1)

1 B.-

Queued Channel (1st)

1 C.-

Tail mortar (1st)

2.-

Conical compression helical spring

3.-

Nut

3rd.-

Nut Radial Arm (3)

4.-

Crossbar

4th.-

Crossbar neckline (4)

5.-

Compression coil spring cylindrical

6.-

Lock box

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Exhibition of a preferred embodiment

Regarding the drawings and references above listed, an execution mode is illustrated in the attached drawings preferred object of the invention, which refers to a reversible latch for locks that, as the figures illustrate 1 to 3, consists of a conical compression helical spring (2) that it is mounted on the tail (1a) of the latch (1) so that its front end is the largest diameter and is applied against the rear face of the radial arm (3a) of the nut (3), while its rear end has sliding adjustment with respect to the diameter of the tail (1a) of the latch (1) and is applied against the face front of a crossbar (4) which, with the possibility of free rotation, is coupled in a channel (1b) of said tail (1a) of the latch (1) and that by its rear face is applied against the front end of a helical cylindrical compression spring (5) having its rear end applied against the lock case (6) and that its working voltage is conveniently lower than that of the spring conical compression helical (2) and adequate to that necessary for the normal operation of retracting the latch (1); the resort conical compression helical (2) we can designate it interchangeably as a conical spring, strong spring or spring reversibility; the helical compression spring cylindrical (5) we can designate it as cylindrical spring, spring weak or spring retraction.

As can be seen, in this constitution the reversibility spring (2) is ahead of the spring retraction (5) and is the only one that is properly installed at tail length (1a) of the latch (1); as well as the spring of reversibility (2) is behind the radial arm (3a) of the nut (3), it turns out that most of this tail (1a) is free and it is possible to provide him with ways of considerable increase in his robustness, like the one shown in figures 1 to 3.

On the other hand, within this conception of shape and location of reversibility springs (2) and of retraction (5), the creation of the crossbar (4) eliminates the washers and traditional rivets, with the advantage of simplifying the assembly in a very significant way, since it is mounted by mere channel assembly (1b); in this regard, according to the invention, it turns out that, seen laterally the latch from front to back, the crossbar (4) presents (figure 3) a "C" shaped profile of sides straight height slightly lower than the gap between box and lock cover that determines paths upper wings e lower parallel to each other and that form a square with a body central that is perpendicular to the tail (1a) of the latch (1) and that  it has a neckline (4a) that has sliding adjustment with respect to the bottom of said channel (1b) of this tail (1a) and that opens until the lower wing of the "C" profile.

In figure 1 the latch (1) is in position at rest, in which the conical spring (2) is distended and the cylindrical spring (5) is in the medium distension state that corresponds to the rest position of the latch (1). For perform reversibility, it is necessary to apply an axial action (figure 4) that compresses the conical spring (2) until the head of the latch (1) appears completely in front of the front of the lock box (6), where it is possible to turn it half a turn necessary for the lock to change the opening hand once that is placed on the door; axial action can be performed pulling the doorknob head, if the lock is recessed and it is already installed in the door, or it can be done by pushing with the tip of a screwdriver on (figures 1 to 3) a mortise (1c) of the rear front of the tail (1a) of the latch (1) and, Then, produce the turn around.

Normal operating retraction operation of the latch (1) is illustrated in figures 6 and 7, where shows the retracted position; in which, by operating the nut (3), the arm (3a) pushes the conical spring (2) which, being stronger that the cylindrical spring (5) behaves rigidly and transmits the axial action that results in compression of the latter.

Claims (2)

1. Reversible latch device for locks, characterized in that it consists of a conical compression helical spring (2) that is mounted on the tail (1a) of the latch (1) so that its front end is the largest diameter and is applied against the rear face of the radial arm (3a) of the nut (3), while its rear end has sliding adjustment with respect to the diameter of the tail (1a) of the latch (1) and is applied against the front face of a crossbar ( 4) that, with the possibility of free rotation, is coupled in a channel (1b) of said tail (1a) of the latch (1) and that on its rear face is applied against the front end of a helical cylindrical compression spring (5 ) that it has its rear end applied against the lock case (6) and that its working tension is lower than that of the conical compression helical spring (2). 2. Reversible latch device for locks, according to the first claim, characterized in that, when viewed laterally from the front back latch, the cross member (4) has a "C" shaped profile with straight sides of slightly lower height than the hollow between a box (6) and a lock cover that determines both upper and lower wings parallel to each other and that form a square with a central body that is perpendicular to the tail (1a) of the latch (1) and that has a neckline (4a) which has sliding adjustment with respect to the bottom of said channel (1b) of this tail (1a) and which opens up to the lower wing of the "C" profile.