FI124283B - Door lock with noise canceling locking device - Google Patents

Description

DOOR LOCK WITH NOISE-DETECTING DIRECT TELEVISION SYSTEM

The invention relates to a door lock having a noise-absorbing direct door arrangement according to the preamble of claim 1.

Direct telescope solutions made of hard plastic or other lightweight non-magnetic materials are known in the art for door locks, especially in the interior, so-called. intermediate door locks for various applications, and they have also been used in mag-10 rivets, where the output of the direct shaft is effected by the pulling force of the magnets of the direct shaft and the magnets of the counter-iron in the door frame. Since the straight axle is relatively light due to the material selected, it requires correspondingly less force to move it. However, moving the straight axle to its protruding position and back to the lock body retracted position 15 causes noise because the movements are limited by suitable responses and as a result of the direct axle striking them there is a certain knock. When the door is closed, the direct axis tends to escape from the lock body due to the mutual attraction of said magnets, or even if the counter-iron is a magnetic metal such as iron. As a result, the end of the straight axle strikes the iron and causes a collision. As the Toi-20 catches the door closing, the straight axle moves from the iron opening into the counter iron. This movement is limited by the stop on the lock body, whereby the collision of the straight axle body results in a knock again. WO 2009097685 and DE 202009001896 U1 disclose known solutions which also include bump damping parts.

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The object of the invention is to provide a new type of direct link arrangement

Lo equipped door lock, which can substantially reduce the noise caused by the movements and operation of the direct shaft described above.

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§30 The objects of the invention may be achieved in the manner detailed in claim 1 and in the other claims. According to the invention,

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at the protruding end of the body there is a sound-absorbing part arranged in 2 rectangles such that, when the door is closed, it strikes the door frame counter-bar and slides against the bar until the straight-bar is at the iron bar opening. In this way, it is possible to advantageously and efficiently attenuate the noise caused by this noise source associated with the operation of the door lock.

In practice, said sound-absorbing part is of a softer plastic than the other direct line or the like, for example a thermoplastic elastomer, and is preferably provided at the end of the direct line by injection molding. To ensure that said silencing member stays at the end of the straight axle, the joint surface 10 between them is a salmon tail joint.

In alternative embodiments, said sound-absorbing portion is arranged to partially obscure the end of the direct axis.

15 The structure of the straight axle is in practice such that the body part inside its lock body has a projection transverse to the direction of movement of the straight axle which, together with the counter surface inside the lock body, defines the length of the straight axle outlet. In order to eliminate the aforementioned second source of noise related to the operation of the direct axis, said projection is preferably provided with a second sound-absorbing part which strikes said mating surface.

The invention will now be described, by way of example, with reference to the accompanying schematic drawings, in which: - FIG. 1 is a partial sectional view of a door lock according to the invention mounted in a door with the door closed; and we get x cut,

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Figures 3a, b and c illustrate various embodiments of the so-called § 30 noise reduction arrangements of the direct line, Figure 4 illustrates the interaction between the direct line and the door lock when closing the door, and Figure 3 illustrates the magnetic flux of the direct line magnets.

In the drawings, reference numeral 1 denotes a door having a recessed lock body 3 with a reciprocating straight bar 6, and reference numeral 2 denotes a 5 door frame having a lock counter bar 4 having a lock bar 4a for the straight bar in a manner known per se.

The straight axle 6 comprises a protruding end 6a which, when locked, is located in the locking iron housing 4a as shown in Fig. 1, and a body portion 6b which is continuously housed within the lock body 3. The straight axle 6 also has embedded permanent magnet means 7 cooperating with the permanent magnet means 5 in the iron body (4a) so that, when the door is closed, the counter iron permanent magnet means 5 pulls the straight axle end 6a out of the lock body. When the straight axle 6 is at the counter iron body 4a, the straight axle 6 moves counter-15 to the iron body 4a due to magnetic forces.

The lock body 3 has an operating shaft 11 having a power transmission means not shown in more detail for push action so that the direct axis can be retracted to open the door through the power transmission element 20 12 shown in Fig. 1. In this case, the lock body 3 is also provided with a second operating shaft 14, from which the straight axle can be locked in a manner known per se for certain installation objects, for example a toilet. The rear locking takes place by moving the operating axis 14 of the deadlock element 15 in the direction of the arrow dead bolt protruding end 6a to-back. At the same time, the rear locking element δ 25 blade 15 also pivots the transmission element 12 towards the straight axle out-

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4 projecting ends 6a, wherein the transmission connection of the transmission element 12 is operable

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m to the rear axle 11 at the same time breaks. This is a technique known per se, so it is not shown in more detail here.

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As shown in the figures, the protruding end 6a of the direct axle is provided with a first sound-absorbing part 8, which may be e.g.

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elastomer. This can be achieved at the end of the direct axle, for example, as an injection mold. As shown in Fig. 2, the first sound-absorbing part 8 is provided with a salmon tail joint to ensure retention. The first sound attenuating part 8 may be implemented in various ways as illustrated in Figures 3a, b and c. Thus, the first silencing member 8 need not cover the entire end 6a of the direct axle, but it is essential that it is mounted so that when closing the door it first strikes the strut 4 and slides along it as shown in Figure 4 until the strut 6 settles into the strut body 4a. whereby the direct axis 6 due to the mutual attraction of the permanent magnet means 5 and 7 moves to the iron body 4a in the position of Figure 1.

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Figures 5a and 5b illustrate the magnetic flux provided by the permanent magnet means 7 of the direct axis 6 and its effect on the position of the direct axis relative to the lock plate chest plate 3a. The permanent magnet means always tend to have a space where their end is in contact with the metal, i.e. in this opening of the breast plate 3a. Fig. 5a illustrates a situation in which the door is opened by pulling a button on the straight axle 6 into the lock frame 3. Since the ends of the permanent magnet means 7 are then located in the opening of the breast plate 3a, the straight shaft 6 remains in this position with the door open. If for some reason the direct axis in this situation escapes to the position of Fig. 5b, it must first be pushed inside the lock frame before closing the door.

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5b, it can also be noted that the magnetic flux provided by the permanent magnet means 7 is capable of securing not only the mutual attraction of the direct axle permanent magnet means 7 and the permanent magnet means 5a of the iron body 4a that the straight axis 6 normally remains in the locking gap 4a.

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As further illustrated in the figures, the direct shaft body portion 6b has a transverse projection 9 which, together with a counter surface 13 inside the lock body, defines the output length of the direct shaft 6. When the Direct Axle Magnets Attract

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As a result of § 30, it protrudes out into the body of the reinforcing bar 4a, the projection 9 bumps into the abutting surface 13. In order to attenuate the resulting noise, the projection 9 is

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3a, b and c, this second sound-absorbing part 10 may be implemented in different ways, comprising elements located on different sides of the straight axle body 6b. Preferably, this second sound absorbing member 10 may also be a thermoplastic elastomer.

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It may be added that, naturally, the element having a counter surface 13 inside the lock body 3 may also operate in the other direction, i.e. limit the movement of the direct shaft 6 inside the lock body 3 together with the second projection 16 in the direct shaft body 6b.

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The invention is not limited to the embodiment shown, but many variations are conceivable within the scope of the appended claims.

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Claims (4)

1. A door lock with a sound-damping straight-piston arrangement, which includes a reading housing (3) with a straight-piston (6) which is at least mainly of plastic or some other light, non-magnetic material and which is provided with permanent magnetic means (7) which are arranged to cooperate with magnetic means (5) of an end plate (4) on the door frame to partially pull the shaving piston into the end plate (4) when the door is closed, and in which the reading housing (3) there is at least one functional shaft (11) on which means for pulling the shaving piston (6) into the reading housing (3) to open the door, characterized in that the ends (6a) of the shaving ends (6) projecting out of the reading housing (3) are provided with a first silencer (8) arranged on the shelf piston (6) that upon closing the door it hits the end plate (4) on the door frame and slides against the end plate (4) until the shaving piston (6) lies at the opening in the end plate (4), said first silencer (8) has been created the projecting end (6a) of the straight piston by injection molding, and the connecting surface of the first sound attenuating member (8) with the projecting end (6a) of the straight piston comprises a salmon tail joint (8a). Door lock according to claim 1, characterized in that said first sound attenuating part (8) is of softer plastic than the other straight piston or of a similar material, for example thermoplastic elastomer. Door lock according to any of the preceding claims, characterized in that said first sound attenuating part (8) is arranged to cover only partially the projecting end of the straight piston (6a). δ (M o Door lock according to any of the preceding claims, characterized in that the body part (6b) located in the shelf (6) in the reading housing (3) has a relative piston (6b) | direction of movement transverse projection (9) which together with a stop surface o (13) in the reading housing determines the projection length of the shaving piston (6) and which is provided with a second sound-damping part (10) which strikes the abutment surface. δ c \ j