EE01434U1 - Lock for an interior door - Google Patents

Abstract

The present invention relates to a lock for an interior room. Said lock (10) for interior door comprises a bolt (16) and bolt tail (17), a hub (20) that is rotatable by operating the handle, a latch (13) and a latch tail (25) engageable with the door frame, being positioned between the horizontal axis of the hub (Yl) and the bolt (16). According to the present invention said lock (10) further comprises a lever (15) being pivotable around a lever hinge (24) for retracting the latch (13) having a first arm (50) connected to the latch (13), and a second arm (60) being movable by a hub tab (32) when the handle is operated. In addition to that the length of the second arm (Z2) is equal or longer than the length of the first arm (Zl) which makes retraction of the latch easy.

Description

Technical field

The invention relates to a lock for use indoors in houses, hotels, apartments and other types of buildings, and more particularly to a lock that allows easy retraction of the lock latch while being minimized overall.

Technical level

Mortise locks for interior use in houses, hotels, apartments and other types of buildings generally include a latch that is operated by a handle on each side of the door and a latch that is operated by a key or cylinder lock. The locks are installed in a recess in the edge of the door and include latches or latches that can be operated (i.e., pushed out or pulled back) by a recessed locking catch formed in the door jamb or frame.

to get rid of it or to get rid of it.

Generally, the latch, also referred to as a mortise or mortise lock, for interior doors is mounted at least partially above the location of the lock cylinder. When the door handle is moved when the user presses it down, the movement of the cylinder and the latch is oriented in the same direction. According to the state of the art, a small piece of material, such as a lever, can be used to retract the latch when the cylinder is moved. This type of lock is preferably used indoors not only because of its easy and quiet operation, but also because of its simple construction.

The latches and latchbolts used in locks come in different sizes, which have evolved in accordance with the development of industry standards. Specifically, the position of the handle and cylinder lock requires the use of one of several standard sizes. If a similar type of lock is desired to be smaller in size, the handle must be rotated

The retractable latch should be an integral part of it. The average length of the lock handle should preferably correspond to the standardized dimensions of the lock that have developed over time. If the average length of the lock handle is designed according to the standardized dimensions of a smaller lock, then the lock latch should be located simultaneously below the core and closer to the lock tongue. In this case, the direction of the latch retracting should be oriented opposite to the direction of the lock core. Therefore, if the size of the lock is minimized, in order to maintain the value of the handle length in a standardized ratio, a mechanism is needed that easily retracts the latch into the lock housing without increasing its price. In addition, it is necessary that the position of the latch can be changed according to the door used. A much more practical way of changing the position of the latch also makes it easier for the user to install the lock. There is a need for an improvement in the lock where the lock is suitable for installation on doors that open inwards and outwards and where not only the knob and handle return them to their original position, but also maintain the engagement between the handle and the latch in this retracted position.

The distance between the lock cylinder and the axis of rotation of the cylinder lock, which is called the arm

The distance between the handle axis and the lock is standardized in a given country, as well as in a larger geographical area at a given time. The position of the lock parts must correspond to the dimensions of a standardized lock. Recently, in order to save time and money, it has been desired to use a smaller-sized mortise lock, reducing the area occupied by the lock, especially in wooden doors.

Furthermore, one of the goals is to save materials with a smaller size lock, which in turn reduces the price of the lock. However, minimizing the size of the lock also requires standardized dimensions, which necessitates the use of complex knots and increases the price of the lock.

The essence of the invention

The main object of the present invention is to provide an improved lock of the general type described above which satisfies the above-mentioned requirements.

The primary objective of the invention is to provide a lock that is minimized by the use of a lever, allowing easy retraction of the latch and maintaining the standardized dimensions of the lock in force at the time.

Another object of the invention is to provide a lock in which the force required to retract the latch is reduced.

A third object of the present invention is to provide a lock that is easy for the user to handle, wherein the latch is smoothly retracted and does not create any additional resistance in the system due to optimal force transmission.

The fourth object of the present invention is to provide a lock in which, thanks to optimal power transmission,

It is possible to use smaller sized parts in the lock.

A fifth object of the present invention is to provide a lock that can be constructed in a simple manner without using complicated parts, thereby reducing labor costs for manufacturing the lock.

A sixth object of the present invention is to provide a lock that includes simple and durable parts subjected to minimal frictional force.

A seventh object of the present invention is to provide a lock for which smaller sized slots must be made in the door cover for installation on the door.

An eighth object of the present invention is to provide a lock in which the lock bolt is easily replaceable.

A ninth object of the present invention is to provide a lock whose latch mechanism is improved so that it can be installed on both left-handed and right-handed doors with a simplified latch retraction mechanism.

Summary of the invention

The present invention relates to a lock for installation on interior doors of schools or apartment buildings. This interior door lock comprises a lock bolt and a bolt tail, a core rotatable when the handle is operated, a latch engaging the door frame and a latch tail, which is mounted between the horizontal axes of the core and the bolt. According to the present invention, said lock further comprises a lever, which is rotatably mounted on a lever hinge for retracting the latch, which has a first arm connected to the latch and a second arm, which is rotatable when the handle is operated

movable with the core blade. In addition, the length of the other arm is the same or greater

as the length of the first arm, which facilitates the retraction of the latch.

Brief description of the drawings

The drawings are included solely for the purpose of illustrating the lock, where the advantages of the lock outlined above over the prior art are briefly described below. The drawings are not intended to limit the scope of the invention as defined by the claims, nor to be interpreted as the only technical solution presented in the description of the present invention.

Figure 1a shows a top view of a lock in which the lock tongues are operable according to the present invention.

Figure 1b shows a top view of the lock with the top cover removed according to the present invention.

Figure 1c shows a perspective view of a lock according to the present invention with the cover removed and the lock tongue retracted.

Figure 2a shows a top view of the lock with the cover removed and the latch and latchbolt retracted according to the present invention.

Figure 2b shows a perspective view of the lock with the latch and the lock tongue retracted according to the present invention.

Figure 2c shows a perspective view of the lock shown in Figure 2b.

Figure 3a shows a top view of the lock according to the present invention, with the cover removed and the latch in the right-hand position before closing the door.

Figure 3b shows a perspective view of the lock shown in Figure 3a.

Figure 4 shows a perspective view of the lock according to the present invention and a detailed view of the retracted latch.

Figures 5a-d are a series of perspective views showing changes in the position of the latch according to the present invention.

Figures 6a-d show four detailed views of the lock where the position of the latch has been changed in accordance with the present invention.

Figure 7 shows two perspective views of a lock according to the present invention,

where the latch has been pushed out and pulled back.

Figure 8a shows a top view of the lock with the core contacting the lever according to the present invention.

Figure 8b shows a partial top view of the lock, where the core exerts a force on the lever such that the latch is retracted in accordance with the present invention.

Figure 9a shows a rear view of a lock according to the present invention.

Figure 9b shows a rear view of the lock according to the present invention, with the latch retracted.

Figure 10a shows a partial top view of the lock, with the lock in the open position and the applied force shown.

Figure 10b shows a partial top view of the lock, with the lock in the closed (retracted) position and the applied force shown.

Description of the invention

Referring to the above-mentioned drawings, the present invention provides a lock for interior doors. The following reference numerals are used to refer to different parts in the drawings:

10 lock

13 latch

15 lever

16 lock tongue

17 lock tongue tail

18 keys

19 main body

20 core

21 core springs

22 mounting springs

23 latch case

24 lever hinge

25 latch tail

26 top cover

27 connector

28 latch connection kit

29 pilot hole

30 plate

32 cores

Y1 core horizontal axis

Y2 latch horizontal axis

40 core slot

50 first shoulder

60 second shoulder

Z1 first shoulder length

Z2 second arm length

E handle axial distance

70 latch pin

71 latch slots

72 connection tool hole

80 curved edge

90 concave edge

As shown in Figures 1a-1c, the interior door lock (10) according to the present invention includes a push-out/pull-out latch (16) and a latch tail (17) which is pushed out or pulled back when the key (18) is turned; the core (20) is rotatable when the handle is operated; the latch (13) engaging the door frame and the latch tail (25) are arranged between the horizontal axis (Y1) of the core and the latch (16). The lock further includes a lever (15) which is rotatable about a lever hinge (24) to retract the latch (13) when the handle is operated, comprising a first arm (50) connected to the latch (13) and a second arm (60) movable with the core shank (32). In addition, the length of the second arm (Z2) is the same or

greater than the length of the first arm (Z1).

According to the state of the art, the latch of a lock used on interior doors is hereinafter referred to as the latch being positioned above the core and closer to the upper part of the lock, being retracted into the main body (19) when the handle is moved. The disadvantage of such a solution is that if it is desired to produce a smaller interior door lock, there is a conflict with maintaining the standardized dimensions of the lock. According to the present invention, as can be seen in Figure 1a, since the handle axis distance (E) is kept according to the standardized dimensions, the latch is positioned between the horizontal axis (Y1) of the core and the latch tongue (16). In other words, in a lock where the handle axis distance (E) is minimized according to the standardized dimensions, the latch must be positioned below the core. Thus, the latch of the lock (10) is positioned close to the latch tongue, requiring the use of a joint to retract the latch into the main body (19) of the lock. If a force is applied to the handle, where the handle is shorter compared to the length of the latch pushing arm, then

apply a greater force than the force generated by the lever pushing the latch. In this case, excessive load is placed on both the lever and the lever hinge.

One object of the present invention is to provide a lock having a latch pushing lever which easily retracts the latch and does not require its complex parts, while minimizing the size of the lock. According to the present invention, the lever (15) used as a latch pusher is preferably designed in one piece. As can be seen in Figure 1, the lever (15) moves in a synchronized manner with the latch (13) and the latch tail (25) and the operation of the handle causes a rotary movement of the core, which retracts the latch into the main body (19). Referring to Figures 8a and 8b, the lever (15) for retracting the latch (13) is designed in a V-shape with two arms, a first arm (50) and a second arm (60) of different lengths. In a preferred embodiment of the invention, the length (Z2) of the second arm of the lever (15) is the same as or longer than the length (Z1) of the first arm of the lever (15). Due to the inward movement (retraction of the latch), friction occurs, and according to the present invention, this friction is reduced by using a lever with two arms of different lengths.

Referring again to Figures 8a and 8b, the first arm (50) of the lever (15) includes a curved

a surface (80) which allows the distance (X1) between the transverse axis passing through the point where the core blade (32) and the second arm (60) come into contact and the lever hinge (24) to be increased when the latch (13) is retracted. Said core blade (32) is directed by a corresponding pin into the slot (40) of the core. A lock is provided which has a latch which can be retracted relatively easily when the moment arm forming the arm is longer, achieving a balanced load distribution. Referring to Figure 3a, when the core is rotated by moving the handle, the convex surface (80) of the core blade (32) is moved, which causes the lever (15) to rotate. The resultant force represents the sole force and the torque is obtained by combining the system of forces and the torques acting on the rigid body. Referring to Figure 10a, a resultant force (RF) acting as a transverse vector is generated where the core flange (32) contacts the curved edge of the second shoulder (60). Figure 10 shows the components of said resultant force, tangential force (TF) and tensile force (D). Said tangential force (TF) is

a vector that causes the lever (15) to rotate about the axis of the hinge (24) and the tensile force is a vector directed to the center of the hinge (24) and does not cause the lever to rotate. In Figure 10a, the latch is in the extended position and in Figure 10b, the latch is in the retracted position, where scalar quantities are shown. When the latch is moved from the extended position shown in Figure 10a to the retracted position shown in Figure 10b, the tensile force decreases and the tangential force increases, which in turn further facilitates the retracting of the latch. Furthermore, referring to Figure 10a, the distance (L1) between the latch housing (23) and the center of the hinge gradually decreases and the distance (L2) becomes shorter, as shown in Figure 10b, which, due to the different length of the lever (15), supports optimal force transmission. The concave edge (90) of the first arm (50) transmits the force mostly at right angles, preventing the occurrence of scalar quantities that exert resistance on the system. The housing (23) of said latch is connected to the first arm (50) of the lever (15).

As mentioned above, one of the preferred aspects of the invention is that a lock is provided in which unnecessary resistance is reduced, as illustrated in FIGS. 10a and 10b.

aral, supporting a slight load on the latch pin on the latch (15) casing into the latch slot (71)

for guidance. During the operation of the lock, there is no contact friction between the side walls of the slot and the latch to a level that interferes with the operation of the lock. The latch pin (70) is guided into the latch slot (71) formed in the rear part of the housing.

One end of the lever (15) is connected to the latch tail (12). The lever (15) is under pressure from the core spring (21) mounted above the core and can be moved with the core. The plate assembly is under pressure from the mounting spring (22), keeping the lock in the locked position by matching the corresponding teeth. Said mounting spring acts as a plate spring and the other end of the spring, which contacts the spring, supports the extension of the latch, keeping the door in the locked state. Therefore, instead of two springs, only one spring has been added, which allows to reduce the price. The mounting spring (22) contacts the lever (15) and exerts pressure on it.

As can be seen from Figure 1, according to the basic idea of the present invention, the horizontal axis (Y2) of the latch is arranged below the position of the horizontal axis (Y1) of the core. Therefore, a smaller size lock is provided while maintaining standardized dimensions. Referring to Figure 1c, the latch (16) and the latch tail (17) are formed as one piece, but without wishing to limit the scope of the invention, these pieces may be formed as separate parts. The corresponding door handle is firmly attached to the core (20) when the core (20) is rotated; at the same time, the lever (15) is rotated synchronously about the hinge. When the rotation occurs, the latch connected to the first arm of the lever (15) is retracted into the main body. When the user pulls the door to close it, the latch is brought to the position shown in Figures 3a and 3b. In a later stage, the latch is pushed into a recess formed in the door jamb or frame.

Although the present invention relates to a lock having a standard key operated lock tail (18), it will be apparent to those skilled in the art that various types of locking mechanisms may be used to operate the lock tongue. For example, a locking mechanism may be used that is a cylinder lock or a double-bit lock. In addition, a

A lock suitable for the door with a core that is suitable for toilet door type locks.

Furthermore, the lever (15) according to the present invention may be of different construction and design. In particular, the lever rotating about the hinge axis (24) may be affected by the rotation of the core so that the different heights of the lever arms assist in the easy retraction or extension of the lock tongue. The mounting spring pressing the lever is also used to press the plate (30) mounted under the lever (15).

According to one aspect of the present invention, there is provided a lock which can be mounted on doors of various types and sizes. The main feature of this preference is that said latch can be rotated through 180° and is therefore easily mounted on the door. Accordingly, as can be seen from Figures 4 and 5, a latch connection bracket (28) is provided which includes a pilot hole (29) for a connecting means (27). Said connecting means (27) is preferably a screw and said pilot hole (29) is a through hole where the screw engages with the plastic in the hole.

In the case of the latch (13) position changing system, when the user wishes to change the position of the latch, the connecting means (27) can be separated from the circular connecting means hole (72) as shown in Figures 5b and 4, thereby breaking the connection between the latch and the latch tail. Referring again to Figures 5c and 5d, once the latch is released, the latch (13) is rotated 180° and the connecting piece (28) is fully inserted into the housing on the latch tail (25). In this way, the hole formed in the latch tail (25) and the guide hole (29) of the latch connecting piece (28) are aligned and the connecting assembly is installed therethrough.

Figures 6a and 6c show the position of the latch when it is fully retracted. In this case, the connecting means (27) is only partially visible through the connecting means hole (72) in the upper cover (26). In this case, the connecting means (27) will be released spontaneously, even if the upper cover (26) has remained in place to prevent this. Figures 6a and 6d show the latch (13) before the change of position, where it has been pressed as far as possible with a finger and an exact alignment has been achieved for indirect fixing of the connecting means (27) in the connecting means hole (72) in the upper cover (26). In this case, the

connector (27) with a screwdriver or similar tool and can change the latch

position.

According to another preference of the present invention, a lock is provided which has a pull screw which is used to screw the rosettes of the door handle by entering from one end, the screw hole being shaped in such a way as to allow their indirect ejection from the other hole. Such a feature is not found in most such small locks, and according to the invention this feature can be used in various ways, allowing the door handle to be made significantly different from others. It will be obvious to a person skilled in the art that the pin holes can be circular or of some other polygonal shape.

The number of connecting means (27) and the associated upper cover connecting means holes (72) may be variable and may be greater than one. In various embodiments of the present invention, the lock may be used on bathroom and toilet doors; in this case, a second

a core with a cylinder lock, which is used to extend/retract the lock tongue.

Claims (9)

1. An interior door lock (10), comprising a main body (19); a lock tongue (16) and a lock tongue tail (17); a core (20) that is rotatable when the handle is operated; a latch (13) with a latch tail (25) that is engaged with the door frame, which is mounted between the horizontal axis (Y1) of the core and the lock tongue (16), characterized in that the lock (10) includes a lever (15) for retracting the latch (13), which is rotatable about a lever hinge (24), which has a first arm (50) in communication with the latch (13) and a second arm (60) that is rotatable with the core shank (32) when the lock handle is operated and the length of the second arm (Z2) is the same as or longer than the length of the first arm (Z1). 2. A lock (10) according to claim 1, characterised in that the first arm (50) of the lever (15) includes a curved edge (80) which, at the point where the core shank (32) and the second arm (60) meet, increases the distance (X1) between the transverse axis passing through it and the hinge (24) of the lever when the latch (13) is retracted. 3. A lock (10) according to claim 1, characterized in that the latch (13) and the latch tail (25) are connected to each other by means of a connecting means (27). 4. A lock (10) according to claim 1, characterized in that the lock (10) comprises a latch housing (23) connected to a first arm (50) of the lever (15). 5. A lock (10) according to claim 1, characterized in that the lock (10) includes a mounting spring (22) arranged to contact the lever (15) to exert pressure thereon. 6. A lock (10) according to claim 3, characterized in that the lock (10) includes a connecting means hole (72) formed in the upper cover for mounting the connecting means (27). 7. A lock (10) according to claim 1, characterized in that the lock (10) includes a latch connecting lug (28) which provides for the installation of a latch in two positions maintaining the connection between the latch (13) and the latch tail (25). 8. A lock (10) according to claim 1, characterized in that the lock (10) further comprises a plurality of plates for operating the lock tongue (16), a second core with a cylinder lock. 9. A lock (10) according to claim 1, characterized in that the lock (10) includes a latch pin (70) directed into a latch slot (71) formed in the rear cover.