WO2017034079A1

WO2017034079A1 - Door latch assembly

Info

Publication number: WO2017034079A1
Application number: PCT/KR2015/011845
Authority: WO
Inventors: 여주희
Original assignee: 동성산업 주식회사
Priority date: 2015-08-24
Filing date: 2015-11-05
Publication date: 2017-03-02
Also published as: KR20170023452A

Abstract

The present invention relates to a door latch assembly including: a case (100) composed of left and right division members and having provision holes (101) formed at both side surfaces thereof, and having an opening part (103), which is formed at one side end part and has a cover (102) coupled thereto; a hub (200) rotatably provided in the provision holes (101); a locking member (300) for setting the locking of a door by controlling the rotation operation of the hub (200); a sliding member (400) elastically provided by a coil spring (401) so as to slide by the rotation of the hub (200); and a latch bolt (500) provided to enter and exit the opening part (103) for controlling the opening and closing of the door. The present invention further includes an operation rod (600) for sliding together with the sliding member (400) and a latch bolt (500) enabled to slide and rotate, thereby achieving purposes of stably opening and closing the door even with small force by improving the operability of the latch bolt when opening the door and, simultaneously, suppressing noise in the process of opening or closing the door.

Description

Door latch assembly

The present invention relates to a door latch assembly for controlling the opening and closing of the door, and more particularly to a door latch assembly that suppresses the generation of noise in the process of opening and closing the door, and enables a stable operation.

The door latch assembly is a key component used for the door lock, which is installed inside the door, and when the door is closed, the latch bolt is popped out by the action of the spring, and the door is closed into the catch box formed in the door frame. Rotating the door handle installed on the outside, the latch bolt is inserted into the inside to open the door, it can be said to be the most important component in the door lock.

Since the door latch assembly can be commonly used for door locks of various designs, manufacturers who manufacture door locks have developed a door latch assembly that has a stable structure and can obtain high profitability in terms of productivity and manufacturing cost. It is common to manufacture a locking device for the door.

The door latch assembly of the lock device for a door as described above has been variously developed in the past, and a representative prior art related to the door latch assembly is as follows.

Registration Utility Model Publication No. 20-0352220 is made of a housing 110, a pair of inner and outer sides, as shown in Figure 6, the wing having a fixed groove on the surface in contact with each other is formed on the outer periphery, the wing Rotating projection is coupled to the other side of the coupling hole is formed to be coupled to the inner and outer handles installed on both sides of the door, the hub 120 is rotated separately by the inner and outer handle, and is provided on one side of the hub, respectively A pair of rotary levers 130 rotated by the rotation of the hub, a slide member 140 linearly caught by the rotary levers when the rotary levers rotate, and movably coupled to the slide members, and After moving into the housing by the operation of the latch head 150 to the original position to lock or unlock the door, and the receiving space is formed therein, two through-holes at predetermined intervals on both side walls of the receiving space A pair of balls and a pair of balls for adjusting the position by combining with the two through holes are installed in the center of the body, and a fixing protrusion for fixing the hub by combining with the fixing groove of the hub is formed on one side, one end of the end A door lock comprising a holder 160 formed of a locking pin formed on the other side of the fixing protrusion, and a lock member formed on the other side of the fixing protrusion, between the slide member and the holder, and an elastic member 170 for repositioning the slide member. In the latch assembly,

The hub has wings at the outer periphery with a predetermined distance from the surface in contact with each other, the latch head is installed so that the rear portion is always received in the opening of the body so as not to shake or rotate, the holder is on both sides of the storage space It has a block formed with a second through hole, the first through hole, the third through hole at a predetermined interval, the fixing projection is formed on one side of the body so as to be received between the wings of the hub formed at a predetermined interval, the unlocking projection Is the door lock latch assembly is characterized in that it comprises a locking pin formed on the other end of the fixing projections with a large end portion formed on both sides of the curved portion.

In addition, Korean Patent Application Publication No. 10-1533194 discloses installation holes 13 formed at both sides as shown in FIGS. 7 to 8, and at one end thereof, an opening is formed to couple the cover 17 to the outside of the opening.

Bodies

11 and 12;

Hubs

21 and 22 rotatably installed in the installation holes 13 of the

bodies

11 and 12; A coupling member 30 installed inside the

bodies

11 and 12 and forming a guide groove in a horizontal direction; A locking member 40 installed on the guide groove of the coupling member 30 to move left and right and installing a locking lever to lock the door on one side thereof; A sliding member (50) for arranging with the first coil spring (51) inside the bodies (11, 12) to slide by the rotation of the hub (21, 22); A support plate 60 installed inside the

bodies

11 and 12; In the door latch assembly, characterized in that it comprises a latch bolt 70 installed in the opening of the body (11, 12) to control the opening and closing of the door, the body (11, 12) coupling holes (14) After forming, the coupling member 30 penetrates the coupling hole 14, and forms a coupling protrusion which is expanded and fixed by punching, and the coupling grooves 16 are formed in the

bodies

11 and 12. The support plate 60 has a door latch assembly, which is characterized in that it has a rigid coupling structure by forming a coupling piece 61 fitted into the coupling groove 16.

Conventional door latch assembly as described above is commonly formed with an outer slope on the leading edge portion, the latch bolt or latch head for locking or releasing the door to move forward or backward by the rotation of the door handle (hereinafter referred to as 'latched bolt') And a catch box into which the latch bolt is inserted into the door frame in which the door is installed.

Therefore, even if the door is closed without the door handle in a state where the latch bolt protrudes from the housing, the outer slope is naturally retracted while contacting the protective cover of the catch box formed in the door frame, thereby enabling the door to be closed without the door handle.

In addition, after the door is closed as described above, the latch bolt, which has been retracted into the housing by contact with the protective cover, is protruded out of the housing again by an elastic member such as a coil spring installed inside the housing and inserted into the catch box. Is prevented from being opened arbitrarily while maintaining the closed state.

However, in the conventional door latch assembly as described above, the latch bolt made of metal is in contact with the protective cover made of metal formed on the door frame while the door is closed. As the latch bolt and the protective cover rub against each other, there was a problem causing wear of the latch bolt and the protective cover.

This phenomenon, in particular, than the general locking type door lock (A1) to operate by rotating the door handle as shown in Figure 8, the push-pull type door lock to operate by pressing the door handle as shown in Figure 9 It occurs more severely at (A2), which is more likely to slide the latch bolts than the locks for the rotary type doors because the latch bolts are slided using the bevel gear (B) as shown in the case of the push-pull door locks. Due to the small amount of force used, the latch bolt is more likely to be caught inside the catch box.

In addition, in the conventional door latch assembly, when the worker is not installed precisely due to lack of function in the process of installing on the door, the latch bolt is not accurately inserted into the catch box, the latch bolt is pulled to one side and the catch box If the latch bolt is caught by the catch box like this, when the latch bolt is caught by the catch box, when the door handle is rotated to open the closed door, the latch bolt installed to retreat by the sliding member loaded with the coil spring is rotated. Nevertheless, the catch box cannot be retracted, or the door handle is repeatedly rotated, and the latch bolt suddenly retracts, causing a strong noise, such as inconvenience caused by various operating noises.

Therefore, there is an urgent need to develop a door latch assembly that prevents the occurrence of noise, which is a disadvantage of the conventional door latch assembly, and enables stable opening and closing operation while minimizing the occurrence of noise even if the installation state is poor due to a lack of installation ability of the worker.

The door latch assembly of the present invention comprises a case 100 formed of a left and right divided body and having an installation hole 101 formed at both sides thereof, and an opening 103 formed at one end thereof with a cover 102 coupled thereto. The hub 200 installed to be rotatable at 101, the locking member 300 for controlling the rotation operation of the hub 200 to set the lock of the door D, and the rotation of the hub 200. In the door latch assembly comprising a sliding member 400 which is installed in the coil spring 401 to slide the sliding member 400, and the latch bolt 500 is installed to enter the opening 103 to control the opening and closing of the door (D). In

An operating rod 600 installed in front of the sliding member 400 to slide together with the sliding member 400 coalesced with the coil spring 401;

By forming the insertion groove 501 through which the operating rod 600 enters and exits, the latch bolt 500 is configured to allow sliding and rotational operation in the case 100. It is possible to achieve the purpose of making it possible to open and close the door stably with a small force and to suppress the generation of noise in the process of opening and closing the door.

As described above, the door latch assembly of the present invention improves operability by preventing latches between the latch bolt and the catch box formed on the door frame by allowing the latch bolt to be inserted into the case while the door is rotated by the rotational force of the door when the door is opened. At the same time, there is an effect that the door can be opened and closed stably with little force.

In addition, the latch bolt is made of synthetic resin to suppress the noise generated when contacting the catch box protective cover made of metal, and the latch bolt is formed by combining the protective cap made of metal to prevent the latch bolt from sliding. There is an effect to improve the durability by minimizing the wear of the surface.

1 is a perspective view according to an embodiment of the door latch assembly of the present invention.

Figure 2 is an exploded perspective view according to an embodiment of the door latch assembly of the present invention.

Figure 3 is a cross-sectional view of the installation state according to an embodiment of the door latch assembly of the present invention.

Figure 4 is a cross-sectional view of the latch bolt operating state according to an embodiment of the door latch assembly of the present invention.

Figure 5 is an exploded perspective view showing another embodiment of a latch bolt according to an embodiment of the door latch assembly of the present invention.

6 and 7 are exploded perspective view showing a latch bolt assembly according to the prior art.

8 is an exemplary view showing a locking device for a rotation type door coupled with a general latch bolt assembly.

9 is an exemplary view showing a lock device for a push-pull type door coupled with a general latch bolt assembly.

The door latch assembly of the present invention is formed of a left and right divided body to form the installation hole 101 on both sides and the opening (103) formed at one end of the cover 102 is coupled to the installation hole ( The hub 200 installed to be rotatable in 101, the locking member 300 for controlling the rotation of the hub 200 to lock the door, and the coil to slide by the rotation of the hub 200. In the door latch assembly comprising a sliding member 400 which is installed in the spring 401 and a latching bolt 500 installed to enter the opening 103 to control the opening and closing of the door, the sliding member 400 Installed in the front to form an operating rod 600 sliding with the sliding member 400 coalesced with the coil spring 401 and an insertion groove 501 through which the operating rod 600 enters and leaves the case ( 100) Sliding and rotating operation inside Enabling one to constitute a latch bolt (500).

In the present invention, the case 100, the hub 200, the locking member 300, the sliding member 400 is well known structural features and functions in the technical field of the present invention, the case 100, The detailed description of the hub 200, the locking member 300, and the sliding member 400 will be omitted without the specific technical description.

The case 100 is composed of left and right partitions so that the left and right partitions engage with each other so that the left and right partitions are in contact with each other to form an uneven portion.

At least one or more through-holes are formed on left and right sides of the case 100 to allow the hub 200 to be coupled and rotate so as to form an installation hole 101 and to simultaneously move the locking member 300 sideways. To form.

In addition, an opening 103 is formed at the front end of the case 100, and a plurality of coupling pieces 508a are formed around the inlet of the opening 103 to cover the coupling pieces 508a with the operating holes of the cover 102. The cover 102 is installed at the inlet of the opening 103 of the case 100 by inserting it into 102a.

The hub 200 is coupled to the inner and outer door handles H1 and H2 and the rotating shaft rods, respectively, so that the hub 200 rotates and the inner surfaces of the hubs 200 are engaged with each other. By forming the wing piece 201 so that the wing piece 201 is fitted to the long hole formed in the sliding member 400, the sliding member 400 is slid back and forth by the rotation of the hub 200.

Locking member 300 Locking lever 301 is coupled to the locking member 300 is inserted into the fixing groove 202 formed in the wing piece 201 of the hub 200 by the operation of the locking lever of the hub 200 By suppressing the rotation, it is possible to lock the door.

When viewed from the side, the sliding member 400 has a "c" shape to form a long hole into which the wing piece 201 of the hub 200 is fitted so that the rotational force of the hub 200 is the wing piece 201 By being transmitted to the sliding member 400 through the front and rear sliding operation of the sliding member 400 is made.

The operating rod 600 has a locking portion 601 formed at an inner end thereof to penetrate the front end of the operating rod 600 to a through-hole 402 formed on the front surface of the sliding member 400. 601 is in close contact with the inner surface of the sliding member 400 is installed.

In addition, by the elastic spring of the coil spring 401 between the locking member 300 and the engaging portion 601 by the elasticity of the coil spring 401, the sliding member 400 operating rod 600 and the sliding operation together; At the same time, the operating rod 600 is operated by the elastic force of the coil spring 401 to the outside of the case 100.

The latch bolt 500 is installed in the opening 103 of the case 100, but an insertion groove 501 is formed in the center of the inner side of the latch bolt 500 so that the tip of the operating rod 600 is inserted. By allowing the groove 501 to enter and exit, the operating pressure acts to protrude out of the case 100 by the operating rod 600 to which the elasticity of the coil spring 401 acts.

In this case, a plurality of locking protrusions 506 are formed on the upper and lower surfaces of the latch bolt 500 so that the latch bolt 500 does not leave the case 100 so that the locking protrusion 506 is an opening of the case 100. To be caught inside the cover 102 coupled to (103).

In addition, the upper and lower portions of the insertion groove 501, the guide piece formed to connect the inner inclined surface 504a parallel to the outer inclined surface 502 formed on the outer side, and the guide surface 504b parallel to the engaging surface 503 formed on the outer side ( When the latch bolt 500 is introduced into the case 100 by forming the 504 so that the flat outline of the plane becomes a rhombus shape, the outer slope 502 and the inner slope 504a are parallel to the inner surface of the case 100. When the latch bolt 500 introduced into the case 100 is discharged to the outside of the case 100, the locking surface 503 and the guide surface 504b are parallel to the inner surface of the case 100.

In addition, the latch bolt 500 is formed of a synthetic resin material, a plurality of coupling protrusions 507 is formed on one surface, to form a coupling groove 508b corresponding to the coupling protrusion 507, the locking protrusion ( The outer side of the latch bolt 500 so that the outer slope 502 of the latch bolt 500 is exposed to the protective cap 508 made of metal having a coupling piece 508a that is inserted between the 506 and fixed to the latch bolt 500. By covering the coupling to ensure the durability of the latch bolt 500 made of a synthetic resin while suppressing the metallic noise generated during the operation of the latch bolt 500.

The coupling of the latch bolt 500 and the protective cap 508 using an adhesive, or forming a coupling hole (508c) in the coupling piece 508a of the latch bolt 500 and the protective cap 508, respectively, to the coupling hole It turns out in advance that it is possible to apply a variety of coupling methods, such as by inserting the coupling means such as direct coupling screws or coupling pins.

Door latch assembly 10 of the present invention is used for the keyless door lock device (A) that is generally installed in the interior of the building as shown in Figure 3, the rotation to operate the latch bolt by rotating the door handle It can be used for both locks for type doors or for push-pull door locks, which actuate latch bolts by pushing or pulling the door handle.

That is, in the door latch assembly 10 of the present invention, the case 102 is inserted into the installation groove formed in the door D, and the cover 102 coupled to the opening 103 at the front end of the case 100 has a door ( It is fixed to the installation groove inlet of D), the latch bolt 500 is projected to the outside of the case 100 through the operating hole (102a) of the cover 102, the inner side which is installed inside and outside of the door (D) Rotating shaft rods coupled to the outer door handles H1 and H2, respectively, to the hub 200 installed inside the case 100.

In addition, the door frame (F) in which the door is installed to form a catch box (C) into which the latch bolt 500 is put, and installs a protective cover (c1) on the outside.

Thus, in the state in which the door is closed, as shown in the attached drawing 3, the latch bolt 500 protruding out of the case 100 is introduced into the catch box C formed in the door frame F, so that the latch surface 500 of the latch bolt 500 is closed. ) Is caught on the inner surface of one side of the catch box (C) to prevent the door from being opened arbitrarily.

In addition, the actuation pressure 600 acts on the outer side of the case 100 by the elastic pressure of the coil spring 401 installed in the case 100, the tip end of the actuation rod 600 Is inserted into the insertion groove 501 formed on the inner surface of the latch bolt 500 to push the latch bolt 500 to the outside of the case 100, the pressure on the outer surface of the latch bolt 500 The formed latching protrusion 506 is in close contact with the inner surface of the cover 102 installed at the front end of the case 100, so that the latch bolt 500 maintains a firm fixed state to prevent the door from being opened arbitrarily.

When the door handle of any one of the inner and outer door handles H1 and H2 installed on the inner and outer sides of the door D is opened to open the door in the closed state as described above, the inner drawing as shown in FIG. As the hub 200 coupled to the outer door handles H1 and H2 and the rotating shaft rotates to one side, the wing piece 201 of the hub 200 pulls the sliding member 400 toward the hub 200, and Due to the operating rod 600 coupled to the through hole 402 formed at the front end of the sliding member 400 with the sliding member 400 retracts into the case 100, the locking member 300 and the operating rod 600 Coil springs 401 installed between the engaging portions 601 of the compression is discharged to the outside of the insertion groove 501 of the front end latch bolt 500 of the operating rod 600.

Therefore, the operating pressure of the operating rod 600 acting on the latch bolt 500 is released and the latch bolt 500 is free to move. In this state, when the user opens the door, the rotational force of the door D is latched. Act on the bolt 500.

At this time, since the latch bolt 500 is inserted into the catch box C formed in the door frame F, the rotational force of the door D acts on the engaging surface 503 of the latch bolt 500 while As described above, the outer inclined surface 502 of the latch bolt 500 has an inner inclined surface 504a and the latch bolt 500 rotates in parallel with the inner surface of the case 100, and the operating rod 600 retreats at the same time. The door D is opened by being injected into the free space inside.

As described above, in the opening process of the door D, the latch bolt 500 is flexible and naturally inside the case 100 by the rotational force generated when the door D is opened in a free state without any working pressure applied from the outside. Since it is injected into the door (D) during the opening process of the latch bolt 500, the operation noise is not generated at all.

Thus, when the opening of the door D is completed and the user releases the force that rotates the door handle, the sliding member 400 is operated by the elastic pressure of the coil spring 401 that has been compressed inside the case 100. 600 is again advanced toward the opening 103 of the case 100, so that the tip of the operating rod 600 is inserted into the insertion groove 501 of the latch bolt 500 is inserted into the case 100 By pushing the latch bolt 500 to the outside of the case 100, the latch bolt 500 is maintained to protrude out of the case 100.

On the other hand, when the door is closed without any manipulation in the open state as described above, the outer cover 502 formed on one side of the latch bolt 500 is a protective cover (c1) of the inlet of the catch box (C) formed in the door frame (F) ) And the latch bolt 500 is naturally introduced into the case 100, thereby compressing the coil spring 401 installed inside the case 100 and protecting the latch bolt 500 while the door is completely closed. When the contact pressure of the cover c1 is released, the latch bolt 500 is protruded again by the restoring force of the coil spring 401, and the door D is closed by being introduced into the catch box C.

At this time, the latch bolt 500 is made of a synthetic resin material, when the outer inclined surface 502 is in contact with the protective cover (c1) made of a metal, not only can suppress the occurrence of metallic noise, but also outside the latch bolt 500 A latch that repeats the operation of being introduced into and discharged into the case 100 by covering and coupling the protective cap 508 made of metal to the outside of the latch bolt 500 so that the outer inclined surface 502 of the latch bolt 500 is exposed. By minimizing the wear of the bolt 500 it is possible to ensure the durability.

In order to set the door in the locked state as described above, one end is installed to protrude to the inner surface of the door (D), the other end is pressed the locking lever 301 coupled to the locking member 300, The locking member 300 is inserted into the fixing groove 202 formed in the wing piece 201 of the hub 200, thereby suppressing rotation of the hub 200, thereby maintaining the locked state of the door D, such door ( To release the lock state of D), when the locking lever 301 is pulled to its original position, the lock setting is released while the hub 200 is rotated.

The door latch assembly to which the technique of the present invention is applied can improve the operability of the latch bolt when the door is opened, thereby stably opening and closing the door with a small force, and at the same time, suppressing the generation of noise in the process of opening and closing the door. .

Claims

It is composed of a left and right divided body to form the installation hole 101 on both sides and the opening (103) formed at one end of the cover 102 is coupled to the cover 102, and installed so as to be rotatable in the installation hole 101 The hub 200, the locking member 300 for controlling the rotation of the hub 200 to lock the door D, and the coil spring 401 to slide by the rotation of the hub 200. In the door latch assembly comprising a sliding member 400 to be installed in the snow, and the latch bolt 500 is installed to enter and exit the opening 103 to control the opening and closing of the door (D),

An operating rod 600 installed in front of the sliding member 400 to slide together with the sliding member 400 coalesced with the coil spring 401;

Door latch assembly, characterized in that it comprises a latch bolt (500) to form an insertion groove (501) to the operating rod 600 to move in and out and sliding and rotational operation in the case (100).
The method of claim 1;

The operating rod is formed by engaging the through-hole 402 formed on the front surface formed on the front surface of the sliding member 400 by forming a locking portion 601 at the inner end, the locking member 300 and the locking portion 601 The door latch assembly, characterized in that the coil spring (401) between the gap between the sliding member 400 and the sliding operation.
The method of claim 1,

The latch bolt 500 forms an insertion groove 501 into which the front end of the operating rod 600 is inserted in the center of the inner surface, and is parallel to the outer inclined surface 502 formed on the outside of the upper and lower portions of the insertion groove 501. A guide piece 504 formed by connecting one inner inclined surface 504a and a guide surface 504b parallel to the engaging surface 503 formed on the outer side thereof is formed so that a flat outline line becomes a rhombus shape. Door latch assembly, characterized in that for forming a plurality of locking projections (506) to be prevented from being escaped to the outside of the cover 102 while being caught inside the cover (102).
The method of claim 1;

The latch bolt 500, by forming a plurality of coupling protrusions 507 on one surface,

A protective cap 508 made of metal having a coupling groove 508b corresponding to the coupling protrusion 507 and having a coupling piece 508a that is inserted into the locking protrusion 506 and is fixed to the latch bolt 500. Door cover assembly, characterized in that to cover the outer coupling surface 502 of the latch bolt (500) to cover the outside of the latch bolt (500) and combine.