KR101947124B1 - door latch assembly - Google Patents

Abstract

The present invention relates to an exposed door latch assembly including a cover body having a box structure with an open upper surface; a slider elastically installed so as to protrude through the bottom surface of the cover body; a cam member rotatably installed in the cover body and restraining or releasing a hook; a cam latch restraining or releasing the cam member by repeated pressurization of the cam member; a first elastic member returning the cam member to the initial position when the cam member is released and a second elastic member returning the cam latch to the initial position when the cam member is released; and a lid member coupled to the open upper surface of the cover body and covering the part of installation of the slider, the cam member, and the cam latch. The exposed door latch assembly is provided separately from a door, coupled to the door, and exposed to the outside of the door. Accordingly, unexpected unlocking attributable to impact can be prevented.

Description

Exposed door latch assembly {door latch assembly}

The present invention relates to a door latch of the present invention, and more particularly, to a door latch which is provided separately from a door and coupled to the door so as to be exposed to the outside of the door, To a new type of exposed door latch assembly.

2. Description of the Related Art Generally, a home appliance such as a washing machine, a refrigerator, or the like has a door that opens and closes an internal space of a product. A door latch assembly for maintaining a closed state of the door is provided in the door.

The door latch assembly may have various structures depending on the application or application position.

For example, in the case of a washing machine, since the laundry is washed using the washing water provided in the drum, the door for opening and closing the laundry is prevented from leaking during washing and unwanted discharge of laundry during washing, In the case of such a door latch assembly for a washing machine, it is disclosed in Japanese Patent Application Laid-Open No. 10-2017-0097410, No. 20-0412307, No. 10-1128692, No. 10-0690950 And the like.

On the other hand, since the home bar of the refrigerator must be easily operable by the user, the cam must be smoothly opened and closed, so that the cam is rotated through repetitive pressing operations and the cam latch is repeatedly restrained and released from the cam A door latch assembly of a cam type is mainly used. In this regard, the door latch assembly is as disclosed in Japanese Patent Registration No. 10-1056813, Registration No. 20-0416692, and Japanese Patent Laid-Open No. 10-2015-0074285.

In recent years, there has been provided a product in which a small vertical drum type washing machine is further laminated on or below a horizontal drum type washing machine. In the door of such a small vertical drum type washing machine, a door latch The assembly is used so that the door can be easily opened and closed and the door can be kept in a closed state.

That is, in the case of a small vertical drum type washing machine, a door latch assembly of a cam type, which is mainly used for a refrigerator, can be applied because the door can be configured to prevent the door from being opened unintentionally due to collision of the laundry.

However, since the cam-type door latch assembly used in the small-sized vertical drum type washing machine is constructed not to be housed in the wall of the main body of the washing machine, but to be exposed to the outside while being coupled to the door, It was difficult to apply the wall-mounted cam type door latch assembly as it is.

That is, when the conventional wall-mounted type cam-type door latch assembly is applied as it is, the cam latch is instantly moved upward and downward due to the impact generated when the door is opened and closed.

Published Japanese Patent Application No. 10-2017-0097410 Registration Practice No. 20-0412307 Patent No. 10-1128692 Registration No. 10-0690950 Patent No. 10-1056813 Registration No. 20-0416692 Published Japanese Patent Application No. 10-2015-0074285

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an air conditioner which is provided separately from a door so as to be exposed to the outside of the door, The present invention relates to an exposure-type door latch assembly according to a novel aspect of the present invention.

In order to achieve the above object, according to the present invention, there is provided a door latch assembly comprising: a cover body having a box-shaped structure with an opened top surface and an insertion hole through which a latching hook of a main body of a household appliance is inserted; A slider that is resiliently installed to protrude through a bottom surface of the cover; A cam member rotatably installed in the cover body and recessed and recessed to engage and disengage the engaging hook inserted through the insertion hole and having a cam groove protruded from an upper circumferential surface thereof; A cam latch for restricting or restraining the cam member by repetitive pressing of the cam member while vertically moving and horizontally rotatably installed in the cover member; A first resilient member for returning the cam member to the initial position when the cam member is released from restraint, and a second resilient member for returning the cam latch to the initial position upon release of restraint of the cam member; And a lid member coupled to the open upper surface of the cover body to cover a portion where the slider, the cam member, and the cam latch are installed.

Here, a support shaft is protruded from the bottom surface of the cover body, a rear end of the cam latch is rotatably installed on the support shaft, and the second resilient member is formed of a coil-type compression spring capable of compressing and recovering up and down And one end of the support shaft is in close contact with a side wall of the cam latch while the other end of the support shaft is in close contact with a wall surface of the cover member.

In addition, the lid member may be provided so as to block the adjacent portion on the upper side of the cam latch, so that the cam latch is prevented from lifting during the operation of restricting the rotation of the cam member.

Further, the lid member is formed with a cut-out groove opened so that the cam latch can be lifted at a position of the restraining release time when the cam latch releases the restraint of the cam member.

Further, the cam member is rotatably installed on a rotating shaft passing through the center horizontally in the left-right direction, and one end of the rotating shaft passes through one side wall surface of the cover member and the cam member sequentially, And the other end is inserted into one side wall of the cover body, and a knurled portion is formed on the other end face of the rotation shaft, so that the knurled portion is press-fitted into one side wall of the cover body.

As described above, the exposed door latch assembly of the present invention has a structure in which it is exposed to the outside of the main body of the household appliance while being installed in the door, and has an effect that it can be easily coupled and detached without hindering the aesthetics of the external appearance.

In addition, the exposed door latch assembly of the present invention further provides a lid member, and further, the lid member and the projecting bead are formed in the lid member, so that the operation of the cam latch can be accurately and stably performed. Since it is possible to visually check the internal state through the groove, it is possible to accurately judge whether or not the defect has occurred without separating the whole.

Further, in the exposed door latch assembly of the present invention, since the second resilient member is formed to have a structure that performs the function of the compression spring while performing the function of the torsion spring, the second resilient member allows the accurate operation of the cam latch .

In addition, the exposed door latch assembly of the present invention has a structure in which the coupling of the rotation axis for supporting the rotation of the cam member is inserted through one of the wall surfaces of the cover body so that one of the wall surfaces of the cover body is inserted into the other wall surfaces It is possible to constitute a single body which is not separated from the body, and the manufacturing cost can be reduced.

FIGS. 1 to 3 are perspective views illustrating the exposed door latch assembly according to an embodiment of the present invention,
4 is an exploded perspective view illustrating an exposed door latch assembly according to an embodiment of the present invention.
5 is a plan view for explaining an exposed door latch assembly according to an embodiment of the present invention.
FIG. 6 is a bottom plan view illustrating an exposed door latch assembly according to an embodiment of the present invention.
7 is a cross-sectional view taken along the line I-I in Fig. 5
8 is a sectional view taken along line II-II in Fig. 7
9 is a perspective view illustrating a state in which the lid member is removed to illustrate the exposed door latch assembly according to the embodiment of the present invention.
FIG. 10 is a plan view showing a state in which a cover member is removed to explain an exposed-type door latch assembly according to an embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Exemplary embodiments of an exposed door latch assembly of the present invention will be described below with reference to FIGS. 1 to 10.

FIG. 4 is an exploded perspective view illustrating an exposed door latch assembly according to an embodiment of the present invention. FIG. 4 is an exploded perspective view illustrating an exposed door latch assembly according to an embodiment of the present invention. It is a perspective view.

As shown in these drawings, the exposed door latch assembly according to the embodiment of the present invention mainly includes a cover body 100, a slider 200, a cam member 300, a cam latch 400, The second elastic member 600 and the lid member 700 and is coupled to the door 20 while forming a single product itself.

This will be explained in more detail for each configuration.

First, the cover body 100 is a portion forming an outer appearance.

As shown in FIGS. 2 and 6, the cover body 100 is provided with a hooking hook 11 of the main body 10 of the household appliance, And an insertion hole 110 to be inserted therethrough.

In addition, fastening holes 120 for fastening to the door 20 are respectively formed at both sides of the bottom surface of the cover body 100.

A restricting protrusion 130 for restricting one end of a first elastic member 500, which will be described later, is protruded from a side wall of the cover body 100. This is as shown in FIG. 4, FIG. 9, and FIG.

Next, the slider 200 is a portion that provides a restoring force such that the door 20 is separated from the appliance main body 10 when the exposed door latch assembly for opening the door 20 is unlocked.

The slider 200 is inserted into the cover body 100 and is resiliently installed to protrude through the bottom surface of the cover body 100.

At this time, an exposure hole 140 for exposing the slider 200 is formed on the bottom surface of the cover body 100 and the slider 200 is provided at an upper end of the slider 200 with an exposure hole 140, The extension jaw 210 is formed so as not to completely pass through the extension jaw 210. This is as shown in the attached FIG.

In addition, a mounting groove 220 is formed on the upper surface of the slider 200 along the longitudinal direction of the slider 200, and a coil spring 230 is received and mounted in the mounting groove 220.

The bottom surface of the slider 200 is rounded so that scratches or the like of the door 20, which abuts on the coil spring 230 during its returning operation, can be prevented.

Next, the cam member 300 is provided for restraining or releasing the engagement hook 11 protruding from the surface of the main body 10 of the electric appliance.

The cam member 300 is rotatably installed in the cover body 100 in the up and down direction.

4 and 5, the cam member 300 is provided with a restricting groove 310 for restricting or releasing the retaining hook 11 inserted through the insertion hole 110 of the cover body 100, (See FIG. 7), and a cam groove 320 is formed on the upper circumferential surface of the cam member 310 so as to protrude therefrom.

At this time, the cam groove 320 is formed so that the cam latch 400 is caught and locked so as not to rotate the cam member 300 when the locking hook 11 is locked, and when the locking hook 11 is unlocked, (400) is released.

Next, the cam latch 400 is provided to selectively restrict the rotation of the cam member 300 while restricting rotation of the cam member 300 while being selectively positioned at a restraining portion of the cam groove 320 of the cam member 300.

The cam latch 400 may be configured such that when the locking hook 11 of the appliance main body 10 presses or represses the cam member 300 upwardly as the cam member 300 rotates, And is constrained to be caught by the stepped portion 330 of the cam groove 320 or released from the stepped portion 330 to be released from the constraint.

A support shaft 410 protrudes from the rear side of the bottom surface of the cover body 100 on the side where the cam member 300 is positioned and a rear end of the cam latch 400 is connected to the support shaft And the cam latch 400 is mounted on the tip end of the cam latch 400 so as to be engaged with the step portion 330 of the cam groove 320 while being moved along the cam groove 320, (420) are formed.

The cam member 300 is rotatably mounted on a rotating shaft 340 horizontally passing through the center of the cam member 300. One end of the rotating shaft 340 is connected to one side wall of the cover member 100 and a cam And the other end is inserted into one side wall of the cover body 100. The other end of the cover body 100 is inserted into the other end wall of the cover body 100, A ringing portion 341 is formed and press-fitted into one side wall of the cover body 100. As shown in FIG. In other words, the structure for mounting the cam member 300 can be simplified by the above-described structure, and it is possible to maintain the cam member 300 at an accurate position. This is as shown in Fig.

Particularly, when the rotating shaft 340 is press-fitted to the cover body 100, the side on which the nulling portion 341 of the rotating shaft 340 is pressed is stacked and fused, So that it can be stably prevented.

Next, the first resilient member 500 is configured to return the cam member 300 to its initial position when the cam member 300 is released from restraint.

4, 9 and 10, one end of the first resilient member 500 is fixed to the restricting protrusion 130 formed in the cover body 100, and the other end of the first resilient piece 500 is fixed to the cam And a torsion spring provided to press the upper circumferential surface of the member (300).

The second resilient member 600 may be configured such that the cam latch 400 is constrained to the stepped portion 330 while being moved along the cam groove 320 of the cam member 300, As shown in Fig.

The second elastic member 600 is installed on the upper side of the cam latch 400 among the support shafts 410 so that one end of the second elastic member 600 is in close contact with a side wall of the cam latch 400, (100). ≪ / RTI >

In particular, the second elastic member 600 is formed not only as a simple torsion spring but also as a torsion spring having a coil-like compression spring structure that can be compressed and restored up and down, So that the engaging end 420 of the cam latch 400 can be kept in contact with the circumferential surface of the cam member 300 at all times.

Next, the lid member 700 is a structure provided to prevent departure of each component.

The lid member 700 is formed to cover a portion where the slider 200, the cam member 300, and the cam latch 400 are installed while being coupled to the open upper surface of the cover body 100.

Particularly, the lid member 700 is installed so as to block the adjacent portion on the upper side of the cam latch 400, so that the cam latch 400 is prevented from lifting during the operation of restricting the rotation of the cam member 300 The cam latch 400 may be opened so that the cam latch 400 can be lifted at the position of the restraint release timing when the cam latch 400 releases the restraint of the cam member 300, Grooves 710 are formed. That is, while the cam member 300 is restrained, the cam latch 400 is prevented from being released from the restraining position due to an external shock or the like, So that the cam latch 400 can smoothly pass through the step portion of the cam groove 320. As shown in FIG. Of course, the incision groove 710 serves to partially visually confirm the current state between the cam member 300 and the cam latch 400.

The cam latch 400 may be moved along the cam groove 320 so that the latching end 420 of the lid member 700 restrains the cam member 300 from moving during lifting of the cam latch 400. [ A protruding bead 720 protruding toward the cam latch 400 is further formed. That is, due to the protruding beads 720, the cam latch 400 is prevented from being lifted during the locking operation, so that the excessive hooking of the hook latch 11 is prevented, It is possible to prevent a problem that the cam latch 400 hangs over the restricting groove 310 of the member 300 without being caught by the stepped portion 330 of the cam groove 320.

A supporting bead 730 protruding toward the coil spring 230 is further formed on a side of the lid member 700 facing the position of the coil spring 230 of the slider 200, (230) is supported by the support bead (730). In particular, the support bead 730 may be reduced in diameter toward the bottom of the support bead 730 and may be inserted into the coil spring 230, thereby stably supporting the coil spring 230.

Hereinafter, the operation of the exposed door latch assembly according to the above-described embodiment of the present invention will be described in more detail.

First, the exposed door latch assembly according to the embodiment of the present invention is fastened and fixed to the bottom surface of the door 20 by a separate fastening bolt (not shown).

At this time, the exposed door latch assembly is installed such that a portion through which the rotating shaft 340 passes is not exposed to the front of the door 20. That is, the penetrating portion of the rotating shaft 340 is installed to face the rear of the household appliance.

When the cam member 300 is not constrained by the hooking hook 11 of the main body 10 of the electric appliance in the above-described installed state, the cam member 300 is rotated by the restoring force of the first elastic member 500, The groove 310 is positioned so as to face the direction in which the insertion hole 110 of the cover member 100 is formed and the cam latch 400 is positioned in a non- Lt; / RTI >

When the closing operation of the door 20 is proceeded in the above-described state, the latching hook 11 provided on the main body 10 of the household appliance is inserted into the insertion hole 110 of the exposed type door latch assembly provided on the door 20 And inserted into the restricting groove 310 of the cam member 300 positioned to face the insertion hole 110 in the cover member 100 so that the cam member 300 is inserted into the restricting groove 310 of the cam member 300, .

When the cam member 300 is rotated by the above process, the engaging end 420 of the cam latch 400, which is in contact with the cam groove 320 of the cam member 300, is moved along the cam groove 320 .

When the door 20 is closed by the user and the pressing force of the cam member 300 is released, the cam member 300 receives the restoring force of the first elastic member 500, Position.

The second resilient member 600 urges the cam latch 400 to rotate in the horizontal direction when the cam member 300 is rotated to return to the initial position so that the latching end of the cam latch 400 420 are restrained by the stepped portion 330 of the cam groove 320 so that the cam member 300 is no longer rotated backward and the hooking hook 11 is engaged with the restricting groove 310 of the cam member 300 As shown in FIG.

When the cam latch 400 is pressed downward by the second resilient member 600 in the course of operating the cam latch 400 as described above, The protruding bead 720 of the lid member 700 can be moved in a state where the engaging end 420 of the cam latch 400 is in contact with the surface of the cam groove 320, It is possible to prevent the door 20 from being lifted instantaneously due to an external impact or the like while moving in a state of being closely attached to the surface, so that the door 20 can be accurately locked to the main body 10 of the household appliance only by one operation.

If the user presses the door 20 again to the main body 10 to release the locking of the door 20, the latching end 420 of the cam latch 400 is moved in the direction of the guide When the user releases the pressing force of the door 20 by the rotational force of the first elastic member 600 and the rotational force of the second elastic member 600 and then the user releases the pressing force of the door 20, the cam latch 400 is rotated by the restoring force of the first elastic member 500 The locking hook 11 is pushed out of the restricting groove 310 while being forcibly rotated.

Therefore, the door 20 is unlocked by the above-described process.

As a result, the exposed door latch assembly of the present invention is exposed to the outside of the main body 10 of the household appliance while being installed on the door 20, and can be easily coupled and detached without deteriorating the aesthetics of the external appearance.

The exposed door latch assembly of the present invention further includes a lid member 710 and a protruding bead 720 formed on the lid member 700 so that the cam latch 400, It is possible to accurately and stably perform the operation of the apparatus. In particular, since it is possible to visually check the internal state through the cutout groove 710, it is possible to accurately determine whether or not the apparatus is defective without removing the entire apparatus.

In the exposed door latch assembly of the present invention, the second resilient member 600 is formed in a structure that performs the function of the compression spring while performing the function of the torsion spring, (400) can be accurately operated.

The exposed door latch assembly of the present invention has a structure in which the coupling of the rotation shaft 340 for supporting the rotation of the cam member 300 is inserted through one wall surface of the cover body 100, It is possible to constitute a single body in which one of the wall surfaces of the body 100 is not separated from other wall surfaces, so that the manufacturing cost can be reduced.

10. Household appliance body 20. Door
100. Cover body 110. Insertion hole
120. Fastening ball 130. Fastening protrusion
140. Exposure Ball 200. Slider
210. Extension chin 220. Mounting groove
230. Coil spring 300. Cam member
310. Restraint groove 320. The cam groove
330. Step 340. Rotation axis
341. Knurled part 400. Cam latch
410. Support shaft 420. Retaining end
500. First Elastic member 600. Second Elastic member
700. lid member 710. incision groove
720. Extruded beads 730. Support beads

Claims (5)

A cover body having a box body structure having an open top surface and an insertion hole through which a hook of a main body of the household appliance is inserted;
A slider that is resiliently installed to protrude through a bottom surface of the cover;
A cam member rotatably installed in the cover body and recessed and recessed to engage and disengage the engaging hook inserted through the insertion hole and having a cam groove protruded from an upper circumferential surface thereof;
A cam latch for restricting or restraining the cam member by repetitive pressing of the cam member while vertically moving and horizontally rotatably installed in the cover member;
A first resilient member for returning the cam member to the initial position when the cam member is released from restraint, and a second resilient member for returning the cam latch to the initial position upon release of restraint of the cam member;
And a lid member coupled to the open upper surface of the cover body to cover a portion where the slider, the cam member, and the cam latch are installed. The method according to claim 1,
Wherein a support shaft is protruded from a bottom surface of the cover body and a rear end of the cam latch is rotatably installed on the support shaft,
And the second resilient member is composed of a coil-shaped compression spring that can be compressed and restored up and down, and one end of the support shaft is in close contact with a side wall of the cam latch, Wherein the door is mounted so as to be in close contact with a wall surface of the body. The method according to claim 1,
Wherein the lid member is formed so as to interpose an upper adjacent portion of the cam latch and is formed to prevent the cam latch from being lifted in an operation of restricting rotation of the cam member. The method of claim 3,
Wherein the lid member is formed with a cut-out groove opened so that the cam latch can be lifted at a position of the restraining release time when the cam latch releases the restraint of the cam member. The method according to claim 1,
Wherein the cam member is rotatably mounted on a rotating shaft passing through the center horizontally horizontally,
Wherein the rotary shaft is installed such that one end thereof is inserted into the other side wall surface of the cover body after sequentially passing through one side wall surface of the cover body and the cam member and the other end is inserted into one side wall surface of the cover body,
And a knurled portion is formed on the other end circumferential surface of the rotating shaft so as to be press-fitted into one side wall of the cover body.

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