KR20160124644A

KR20160124644A - Door locking apparatus

Info

Publication number: KR20160124644A
Application number: KR1020150136610A
Authority: KR
Inventors: 전영환
Original assignee: 전영환
Priority date: 2015-04-20
Filing date: 2015-09-25
Publication date: 2016-10-28
Also published as: KR101767201B1

Abstract

The present invention is based on the fact that the door is locked by the primary pressing operation of the user and opened by the pulling operation, but the convenience of releasing the door locking by the secondary pressing operation in the locked state of the door, A door locking device,
A cam that has a first engaging portion and a second engaging portion that engages with the first engaging portion and rotates when the latch is moved forward and backward; a cam provided below the cam; And a safety lever having a slider and a guide hole for guiding the guide rod.

Description

{DOOR LOCKING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a door locking device applied to a door of a home appliance such as a drum washing machine,

More particularly, the present invention is based on the fact that the door is locked by the primary pressing operation of the user and opened by the pulling operation, but the convenience of releasing the door locking by the secondary pressing operation in the locked state of the door And more particularly to an accentuated door locking device.

Appliances such as refrigerators and washing machines all have doors, which must remain closed during operation. Particularly, in the case of a drum washing machine, if the door is opened during washing, a difficult situation such as detachment of laundry and leakage of washing water may occur. To this end, home appliances such as a drum washing machine are generally provided with a door locking device that keeps the door locked so that the door is not opened during operation of the product.

There is a conventional door lock device (hereinafter referred to as " door lock device for home appliance ") of the prior art, A retaining slider which is movable relative to the supporting structure and which, in accordance with the introduction of the hooking member into the opening, moves from the seating position to a working position for holding the hooking member, And a movable lock member which moves from an inoperative position or a side surface position allowing the passage of the holding slider to the seating position to an inoperative position for blocking the passage of the power and allowing the power supply of the household appliance to be allowed, A door locking device for a device, the door locking device being movably installed in a supporting structure, In that it comprises a different locking member is selectively placed in the slider, if the first position or the second position, respectively to allow or prevent movement of the door locking device is presented as claimed.

However, the door locking device disclosed in the related art is switched to the locked state by the user's pressing operation, and the locked state is released by the user's pulling operation. For example, It is impossible to open and close the door such that the user can push and open the door with his / her foot.

Therefore, considering the convenience of the user, the necessity of the technology capable of releasing the locked state of the door through both the pressing operation and the pulling operation is reconsidered.

Accordingly, the present invention has been made to solve the above-mentioned problems,

The door is unlocked by the primary pressing operation of the user and opened by the pulling operation but the door can be unlocked by the secondary pressing operation in the locked state of the door according to the user's situation, To be considered.

According to the present invention,

A cam that has a first engaging portion and a second engaging portion that engages with the first engaging portion and rotates when the latch is moved forward and backward; a cam provided below the cam; And a safety lever having a slider and a guide hole for guiding the guide rod.

Further, the slider is raised by the first elastic member provided at the lower portion, and is pressed down by the cam to be lowered.

Further, the guide hole includes a vertically formed elevation part and a horizontally protruding side part from the elevation part.

The cam further includes a first protrusion and a second protrusion which are spaced apart from each other at a lower end, and the upper portion of the slider is in contact with the first protrusion.

The slider further includes an upper protrusion provided on the upper portion and a side protrusion provided on the side portion so that the first protrusion of the cam contacts the upper protrusion and the second protrusion of the cam contacts the side protrusion .

The upper projection includes a first inclined portion formed at a front side thereof and a first inclined portion formed in front of the first projected portion of the cam, and a second inclined portion formed at a rear side to be in contact with the rear side.

And a stop means formed of a stop protrusion provided on the side of the guide hole of the safety lever and a stop groove provided on the guide rod side of the slider.

Further, the cam further includes a shoulder portion provided at one side, and the safety lever is elevated by a second elastic member provided at the lower portion, and is lowered by a downward projection which is pressed against the shoulder portion .

The present invention also provides a locking device for locking a door by a primary pressing operation of a user, first unlocking means for unlocking the door by a user's pulling operation, And second unlocking means for unlocking the door.

The locking means may include a latch that is advanced by a user's pressing operation, a first projection provided in a lower portion of the cam which is engaged with the latch and pivoted by the advancement of the latch, And an upper protrusion provided on an upper portion of the slider and a first elastic member provided below the slider.

The first releasing means may include a latch which is retreated by a pulling operation of the user, a first projection provided below the cam which is engaged with the latch and pivoted by the backward movement of the latch, And an upper protrusion provided on the slider lowered by the contact and a first elastic member provided below the slider.

The second releasing means includes a latch which is advanced by a second pressing operation of the user in a locked state of the door, a second projection provided in a lower portion of the cam which is engaged with the latch and pivoted by advancement of the latch, A slider provided at a side of the slider that is lowered by contact with the cam, a first elastic member provided below the slider, a guide rod provided at a rear surface of the slider, and a safety member coupled to the rear of the slider, And a guide hole provided in the lever and guiding the guide rod, the guide hole having a vertically formed elevation part and a horizontally protruding side part in the elevation part.

The second releasing means may further comprise stop means formed by a detent projection provided on the side of the guide hole and a stop groove provided on the guide rod side.

The temporary engagement between the detent protrusion and the stop groove is released when the shoulder portion provided at one side of the cam is released by pressing the downward protrusion protruded forward from the safety lever.

The present invention having the above-

In order to maximize the convenience of the user, the door is locked by the primary pressing operation of the user and opened by the pulling operation, but the door is unlocked by the secondary pressing operation in the locked state of the door according to the user's situation .

1 is a perspective view of the present invention.
2 is an internal configuration diagram of the present invention;
3 is a detailed view showing only the essential components (latch, cam, slider, and safety lever) of the present invention.
FIG. 4 is a detailed exploded view showing only the essential structure of the present invention. FIG.
5 is a front view showing only the essential structure of the present invention.
FIG. 6 is a side view (left and right) showing only a core configuration of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

The present invention is applied to a door of a household appliance such as a drum washing machine and is locked by a first pressing operation of a user and opened by a pulling operation. To a door lock apparatus L which emphasizes the convenience of releasing the lock of the door by means of the door lock mechanism.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a door cementing apparatus L according to the present invention will be described in detail with reference to the accompanying drawings.

Prior to describing the present invention in detail, when the approximate direction which is not exact based on FIGS. 1 and 3 is specified, the direction in which the latch 1 is provided is rearward and the direction opposite thereto Rear direction, and the upper and lower directions in the direction in which gravity acts will be described. Also, for convenience of explanation, the left and right are set on the basis of the state shown in each drawing, and the symmetric fluctuation of the left and right will not act as an obstacle to interpretation of the present invention.

1 is a perspective view of the present invention.

1 is a perspective view showing the appearance of the laminating apparatus L according to the present invention. The laminating apparatus L is surrounded by a housing H and its main feature is a latch 1 ). The latch 1 is a structure in which the user is advanced or retracted by an operation of pressing or pulling a door.

In addition, it can be seen that the terminal C is provided at one side of the housing H, and the terminal C is for electrically locking or unlocking operation of the lancing device L, It is to be understood that the present invention is not limited to the above-described embodiments, and any specific description thereof will be omitted. Also, the description of the terminal C and the electric locking or unlocking operation may be omitted, It can be done by understanding and reasoning as much as possible.

Fig. 2 is an internal structural view showing a part of the housing H removed to show the internal structure of the present invention.

2, the present lancing apparatus L includes a latch 1 which is moved forward and backward by a user's pressing operation or pulling operation, a latch 1 which is engaged with the latch 1, A slider 3 provided at a lower portion of the cam 2 and lifted and lowered by the cam 2 and a safety lever provided at the rear of the slider 3 for guiding the operation of the slider 3, (4).

Also, it is possible to confirm the structures for performing the electric locking operation as described above, and such a structure will be omitted as mentioned above.

3 is a detailed view showing only the latch 1, the cam 2, the slider 3 and the safety lever 4, which are key features of the present invention.

Each of the configurations of the present lancing device L will be described in more detail with reference to FIG.

First, the latch 1 has a first engaging portion 11 at one end. In the embodiment of FIG. 3, the first engaging portion 11 of the latch 1 is provided with an engagement ring. The first coupling portion 11 made of a coupling ring is coupled to the second coupling portion 21 made of coupling protrusions so that the cam 2 is rotated backward when the latch 1 is advanced, The cam 2 is rotated forward (refer to FIG. 3)

Next, the cam 2 has a second engaging portion 21 to be engaged with the first engaging portion 11. As shown in Fig. In the embodiment of FIG. 3, it is confirmed that the second engaging portion 21 is composed of the engaging projection. However, since the first engaging portion 11 and the second engaging portion 21 are mutually engaged or coupled with each other , Screw connection, interference fit, bonding bonding, and the like.

The cam 2 is preferably provided with a turning shaft 25 and a return means 26 coupled to the turning shaft 25 so as to be pivoted forward at all times, The cam 2 is returned to its original position and the latch 1 can be moved backward. Here, the return means 26 is preferably provided as a coil spring, but it is not necessarily limited to a coil spring.

Next, the slider 3 is provided at a lower portion of the cam 2, and in particular, the cam 2 is provided with a guide rod 31 at the rear thereof (see FIG. 4).

The slider 3 is guided by the safety lever 4 in such a manner that the guide rod 31 is inserted into the guide hole 41 of the safety lever 4. [ Features relating to the guide rod 31 and the guide hole 41 will be described later.

The safety lever 4 is coupled to the rear side of the slider 3 to guide the slider 3. The slider 3 is provided with the first locking portion 39 provided on the slider 3 and the safety lever 4 The second locking portions 49 are overlapped with each other and then the electrical locking is completed. In addition, such electrical locking can be broken by strong physical force in preparation for an accident such as performing a washing operation while the other object is not in the washing machine, for example, so that the door can be opened.

In FIG. 3, the first elastic member 33 provided under the slider 3 can be identified.

Whereby the slider 3 is lifted by the first elastic member 33 provided at the lower portion and is pressed down by the cam 2 to be lowered. Although the first elastic member 33 is a spring coupled to the lower portion of the slider 3 in FIG. 3, the first elastic member 33 may be provided on the upper portion It may be preferable to contact the lower portion of the slider 3), or it may be provided with other structure having elasticity instead of a spring.

3, the presence of the second elastic member 43 provided at the lower portion of the safety lever 4 can also be checked.

4 is a detailed exploded view showing only the latch 1, the cam 2, the slider 3 and the safety lever 4, which are key features of the present invention. In Fig. 4, the rear surface of each configuration, which could not be confirmed at the time of Fig. 3, can be confirmed. 3 and FIG. 4,

4, the guide hole 41 includes a vertically formed elevating portion 411 and a side portion 413 horizontally protruding from the elevating portion 411. As shown in FIG. 5, the configuration of the elevating portion 411 and the side portion 413 can be seen more reliably.

The side portion 413 is configured to allow the door to be unlocked by the secondary pressing operation of the user, and the side portion 413 ) Will be described in more detail in the description of the operation process of the lattice apparatus L to be described later as a key feature of the present invention.

4, the cam 2 has a first protrusion 22 and a second protrusion 22 which are spaced apart from each other at the lower end of the cam 2, 23), and the lancing device (L) is characterized in that the upper part of the slider (3) is in contact with the first projecting part (22).

The cam 2 is pivoted about the pivot 25 so that the first projecting portion 22 and the second projecting portion 23 of the lower structure of the cam 2 Is rotated backward. At this time, the first projection 22 contacts the upper portion of the slider 3 and presses the slider 3, so that the slider 3 is lowered, and the first projection 22 is positioned rearward of the slider 3 . The slider 3 is raised again by the first elastic member 33 because the pressing by the first projection 22 is released and the first projection 22 and the upper portion of the slider 3 are in contact with each other So that the rotation of the cam 2 and the forward and backward movement of the latch 1 are restricted and locked.

5 is a front view showing only the latch 1, the cam 2, the slider 3 and the safety lever 4, which are key features of the present invention. In particular, the structure of the safety lever 4 is shown separately for clarity.

4 and 5, another feature of the present invention is that the stopper 41 provided on the side portion 413 side of the guide hole 41 of the safety lever 4, The detent 51 is further comprised of a detent 51 and a detent groove 53 provided on the side of the guide rod 31 of the slider 3. The detent groove 53 is visible through Fig. 4).

This stop means 5 allows the guide rod 31 of the slider 3 to come off from the elevating portion 411 and to be seated in the side portion 413 when the lock state of the door is released by the secondary pressing operation of the user And maintains the state. More detailed characteristics related to the seating and holding in the side portion 413 of the guide rod 31 will be described later.

As described above, the lock mechanism is held by engagement between the first projecting portion 22 and the slider 3, and the first projecting portion 22 is formed in order to prevent the lock state from being released arbitrarily. And the slider 3 are made more rigid and precise.

6 (left and right side views showing only the latch 1, the cam 2, the slider 3 and the safety lever 4 which are the essential features of the present invention) The slider 3 further includes an upper projection 35 provided on the upper portion and a side projection 37 provided on the side portion so that the first projection 22 of the cam 2 is engaged with the upper projection (35) and the second projection (23) of the cam (2) is in contact with the side projection (37).

The upper projection 35 protrudes upward on the upper side of the slider 3 and has a width smaller than that of the slider 3. [ The side projection 37 protrudes laterally from the side of the slider 3 and has a slant end 370 to move the slider 3 in the lateral direction when it is pressed backward by the second projection 23. [ .

When the cam 2 is rotated backward by the advancement of the latch 1, the first projecting portion 22 rides over the upper projecting portion 35 of the slider 3, and the first projecting portion 22, And is engaged with the projection 35 to maintain the engaged state despite the return means 26 of the cam 2. [ The locking of the door is maintained through the provision of the upper projection 35 so that the first projection 22 is more easily engaged, so that the operation for the locking state proceeds smoother and provides operational stability .

On the other hand, when an external force is applied to the latch 1 too strongly, there is a possibility that the door may not be maintained in a closed state due to a single push operation (advance operation of the latch) A recess portion 27 and a third projection 28 are formed at one end of the second projection 23 of the cam 2 so as to move up and down along the guide groove 32 formed on the side of the slider 3 And a locking lever 343 coupled to the releasing pin 341 to lock or unlock the safety lever 4.

3, the cam 2 of the locking device L includes a recess 27 formed at one side of the second projection 23, And a third projection (28) formed on the first portion (27).

3, the slider 3 is moved up and down along the guide groove 32 formed in the side portion, but is lowered by the pressing of the third projection 28 of the cam 2, A locking lever 342 which is coupled to the releasing pin 341 and is pivoted by lifting and lowering the releasing pin 341 to restrain or release the safety lever 4 .

The coupling between the release pin 341 and the locking lever 343 is formed by a coupling groove provided on one side of the release pin 341 and a coupling protrusion provided on one side of the locking lever 343, Lt; / RTI &

The restraint between the locking lever 343 and the safety lever is achieved by engagement between the locking protrusion 343b protruded on the other side of the locking lever 343 and the engagement protrusion 443b provided on the safety lever 4.

Further, the locking lever 343 is provided with a return spring 343c which is always rotated toward the slider 3 side.

With this structure, it is possible to prevent the latch 1 from being advanced by the external force to the unintentional open state when the lock state is primarily established.

The lock protrusion 343b of the locking lever 343 and the locking protrusion 343b of the safety lever 4 must be in contact with each other in order to switch the door to the open state by the forward operation (secondary push operation) 443b of the slider 3 must be released. To this end, the side projection 37 of the slider 3 is provided with the lifting type side projection 37T.

More specifically, the lifting type side projection 37T is provided at a lower portion thereof and has a position restoring portion 375 contacting the upper portion of the locking projection portion 443b of the safety lever 4. [ 4, the position restoring unit 375 may include a body of the lifting type side projection 37T and a spring coupled to the body. (The structure of the position restoring unit is shown in FIG. 7)

When the second projecting portion 23 presses the lifting type side projection 37T of the slider 3 through the lifting type side projections 37T, the lifting type side projections 37T are pressed downward, The position restoring portion 375 of the lifting type side projection 37T presses the locking projection 443b downward to temporarily raise the slider 3 so that the locking protrusion 343b of the locking lever 343 is moved upward, And the engagement protrusion 443b of the safety lever 4 is released.

A more detailed description of the operation will be described in more detail in the description of the operation process of the laminating apparatus (L).

In order to further enhance the above-described operational stability, the present invention introduces the first inclined portion 351 and the second inclined portion 352, which will be described with reference to FIG. 6, A first inclined portion 351 which is formed on the first projected portion 22 of the cam 2 and makes a first contact with the first projected portion 22 of the cam 2 and a second inclined portion 352 which is formed behind and comes into contact with the second inclined portion 352 .

6, the inclination of the first inclined portion 351 is gentler than the inclination of the second inclined portion 352. In addition, Through the first inclined portion 351 and the second inclined portion 352, the first protruding portion 22 can easily pass through the first inclined portion 351 having a more gentle inclination, thereby improving the stability of operation , The engaging engagement is further firmly maintained by the second inclined portion 352 which is urged to be inclined after the engagement between the upper projection 35 and the first projection 22 is engaged.

As shown in FIG. 6, the hook portion 220 may be provided at the end of the first protrusion 22 to reinforce engagement with the second slope portion 352.

6, the configuration of the shoulder portion 24, which is another essential characteristic of the present lancing device L, can be confirmed.

6, the cam 2 further includes a shoulder portion 24 provided on one side thereof, and the safety lever 4 is provided on the lower side of the shoulder portion 24, And is lifted by the second elastic member 43 and is lowered by the downward projection 45 which is in contact with the shoulder portion 24 and pressurized.

The detent projection 51 and the detent groove 53 are provided so that the state in which the guide rod 31 is seated on the side portion 413 in order to release the locked state by the secondary pressing operation of the user There is a bar. The shoulder portion 24 of the cam 2 and the downward protrusion 45 of the safety lever 4 release the engagement between the detent projection 51 and the detent groove 53, (31) can return to the elevating part (411) again. A more detailed description of the operation will be given later.

The present invention having the above-described structure can be largely classified according to three operating characteristics. Hereinafter, the present laminating apparatus L will be described according to operating characteristics.

According to the operation characteristics, the locking device L includes a locking means for locking the door by a primary pressing operation of the user, a first releasing means for releasing the locking of the door by the pulling action of the user, And second unlocking means for unlocking the door by a vehicle pressing operation.

Hereinafter, the locking and unlocking process according to the present invention will be described with reference to the structures classified according to the respective operating characteristics.

First, the locking means includes a latch 1 which advances by a user's pressing operation, a first projection 22 provided at a lower portion of the cam 2 which is engaged with the latch 1 and is rotated by advancing the latch 1, The upper protrusion 35 provided on the upper portion of the slider 3 provided at the lower portion of the cam 2 and lowered by the contact with the cam 2 and the first elastic member 33 provided below the slider 3 .

Describing the locking operation of the door through the locking means, the latch 1 advances by the user's pressing operation. At this time, the cam 2 coupled with the latch 1 is rotated backward together with the first projection 22 provided at the lower portion of the cam 2 with the rotation axis 25 as the center of rotation. The first protrusion 22 rides over the upper protrusion 35 provided on the upper portion of the slider 3 and comes into contact with the rear surface of the upper protrusion 35 so that the first elastic member 33 is engaged with the first protrusion 35, The slider 3 which has been pressed down by the pressing member 22 is lifted again and the locked state of the door is maintained by the engagement between the upper projection 35 and the first projection 22. (See Fig. 6)

The first releasing means includes a latch 1 which is retracted by the pulling action of the user, a first protrusion (not shown) provided at the lower portion of the cam 2 which is engaged with the latch 1 and is rotated by the backward movement of the latch 1, The upper protrusion 35 provided at the upper portion of the slider 3 provided at the lower portion of the cam 2 and lowered by the contact with the cam 2 and the first elastic member provided at the lower portion of the slider 3 33).

Describing the unlocking operation of the door through the first releasing means, the latch 1 is pulled back by the user's pulling operation. At this time, the cam 2 coupled with the latch 1 pivots forward with the first projection 22 provided at the lower portion of the cam 2 with the pivot 25 as the center of rotation. The first protrusion 22 located on the rear surface of the upper protrusion 35 rides over the upper protrusion 35 provided on the upper portion of the slider 3 and comes into contact with the entire surface of the upper protrusion 35, The elastic member 33 is pressed by the first projection 22 to raise the slider 3 again and the engagement between the upper projection 35 and the first projection 22 is released, (See Fig. 6)

Next, the second releasing means comprises a latch 1 which advances by the secondary pressing operation of the user in a locked state of the door, a latch 1 which is engaged with the latch 1 and which is rotated by the advancement of the latch 1 A side projection 37 provided on the side of the slider 3 which is provided at the lower portion of the cam 2 and descends due to contact with the cam 2 and a second projecting portion 23 provided at the lower portion of the slider 3 A guide rod 31 provided on the rear surface of the slider 3 and a safety lever 4 coupled to the rear of the slider 3 and provided with guide rods 31, And a guide hole 41 having a vertically formed elevation part 411 and a horizontally protruding side part 413 in the elevation part 411. [

Describing the unlocking operation of the door through the second releasing means, the already advanced latch 1 in the locked state of the door further advances by the secondary pressing operation of the user. At this time, the cam 2 coupled with the latch 1 rotates together with the second protrusion 23 provided below the cam 2 and spaced apart from the first protrusion 22 with the pivot 25 as the center of rotation do. Thereafter, the second projection 23 presses the side projection 37 provided on the side of the slider 3 backward. The rearward pressing force of the second projecting portion 23 causes the slider 3 to move laterally by the inclined end portion 370 formed on the side projection 37 and the guide rod 31 provided on the safety lever 4, Is separated from the elevating portion 411 of the safety lever 4 and is seated in the side portion 413. The upper protrusion 35 of the slider 3 engaged with the first protrusion 22 of the cam 2 also moves laterally so that the gap between the first protrusion 22 and the upper protrusion 35 The engaging engagement is released and the cam 2 is rotated forward by the restoring force of the return means 26 of the cam 2 and the cam 2 rotating forward moves back the latch 1 to release the locked state of the door . The slider 3 is returned to its original position by the restoring force of the first elastic member 33 provided at the lower portion and the guide rod 31 which is seated in the side portion 413 is returned to the elevating portion 411 (See Figs. 5 and 6)

However, according to the restoring force of the first elastic member 33, that is, the elastic force of the first elastic member 33, the slider 3 is returned to its original position before the cam 2 is rotated forward, The engaging between the projecting portion 22 and the upper projection 35 of the slider 3 may not be released properly.

In order to solve this problem, the present invention includes a stop means (5). The configuration of the stop means (5) has been described above, and only the operation process will be described below.

When the guide rod 31 is seated on the side portion 413 of the guide hole 41 due to the lateral movement of the slider 3, the side portion 413 side The detent projection 51 provided on the guide rod 31 is inserted into the detent groove 53 provided on the side of the guide rod 31 to support the seat 413 of the guide rod 31 so that the slider 3 is moved in the lateral direction It maintains the shifted state and provides sufficient time for the cam 2 to turn forward. (See Figs. 4 and 5)

Naturally, the slider 3 can be returned to the original position by releasing the stop means 5. To this end, the present lancing device L is provided with a shoulder portion 24. [

The temporary engagement between the detent protrusion 51 and the stop groove is such that the shoulder portion 24 provided on one side of the cam 2 is protruded forwardly to the safety lever 4 And is released by the action of pressing the downward projection 45.

More specifically, the rearward rotation of the cam 2 causes the shoulder portion 24 to push downward the downward protrusion 45 of the safety lever 4, which is in contact with the shoulder portion 24, 4 are lowered together with the descending projections 45. The detent projection 51 provided on the side portion 413 side of the guide hole 41 of the safety lever 4 is also lowered by the lowered safety lever 4 so that the detent projection 51 is moved downward by the slider 3 The engagement between the detent projection 51 and the detent groove 53 is released and the slider 3 is released from the restoring force of the first elastic member 33 As shown in FIG.

To this end, the detent groove 53 has an opening downward, and a second elastic member 43 is provided under the safety lever 4, and the forward rotation of the cam 2 The fact that the shoulder portion 24 of the cam 2 should press the downward protrusion 45 of the safety lever 4 after the engagement between the protrusion 22 and the upper protrusion 35 is made And it will be understood and practiced by those skilled in the art.

In addition, as described above, when the latch 1 is subjected to an excessive external force, the locking device L can not be maintained in the closed state due to a single push operation (forward movement of the latch) And lock holding means for solving the problem.

The lock retaining means includes a recess 27 formed at one end of the second protrusion 23 of the cam 2 and a third protrusion 28 formed on the recess 27, An unlocking pin 341 that ascends and descends along the guide groove 32 formed in the side portion and descends by the pressing of the third projection 28 of the cam 2 and is raised by the rotation restoration of the locking lever 343, And a locking lever 342 coupled to the pin 341 and pivotable by lifting and lowering the release pin 341 to restrain or restrain the safety lever 4.

The coupling between the release pin 341 and the locking lever 343 is formed by a coupling groove 341a provided at one side of the release pin 341 and a coupling groove 341b inserted into the coupling groove 341a and connected to one side of the locking lever 343 Through the coupling protrusion 343a,

The restraint between the locking lever 343 and the safety lever is achieved by engagement between the locking protrusion 343b protruded on the other side of the locking lever 343 and the locking protrusion 443b provided on the safety lever 4,

The locking device L further includes lock releasing means for releasing the locked state via the lock retaining means. The lock releasing means includes a second protrusion of the cam, a lift-up side protrusion provided on the slider side, The lifting type side projection 37T is provided at a lower portion thereof and has a position restoring portion 375 contacting the upper portion of the locking projection portion 443b of the safety lever 4. [ As shown in FIG. 4, the position recovery unit 375 includes a body of the lifting type side projection 37T and a spring coupled to the body.

Referring to Fig. 7, the operation of the lock holding means and the lock releasing means will be described.

As shown in Fig. 7A, when the door is in the locked state, the lift-up side protrusion (not shown) which provides the lateral movement of the slider 3 for opening the door by the advance operation (push operation) 37T do not contact the second projecting portion 23 of the cam 2, the door can be locked.

7A, the locking protrusion 343b of the locking lever 343 is engaged with the locking protrusion 443b of the safety lever 4 in the locked state of the door, so that the safety lever 4 The state in which the lifting type side projection 37T and the second projecting portion 23 of the cam 2 are not in contact with each other is maintained.

Through this process, the locked state is maintained and even if a strong external force is applied, the second releasing means does not operate and the unintentional door opening does not proceed.

When the latch 1 is advanced again to advance the door opening by the latch advancing operation (pushing operation) in the locked state of the next door, as shown in Fig. 7C, The third projection 28 presses the release pin 341 of the slider 3 and the locking lever 343 is pivoted by the pressurized release pin 341 so that the locking projection 343b of the locking lever 343 is pushed, The releasing pin 341 and the locking lever 343 are engaged with each other through the engagement of the engaging groove 341a and the engaging protrusion 343a with the engaging recess 343a of the safety lever 4, I have explained that it is.)

7 (D), the safety lever 4 whose restraint by the locking lever 343 is released and the slider 3 coupled to the safety lever 4 are lifted up (to the right in FIG. 7 [D] And the lifting type side projection 37T also moves upward so that the operation of the second releasing means can be advanced through contact and pressurization of the cam 2 with the second projecting portion 23. [

By this lock holding means and the lock releasing means, it is possible to prevent the door from being opened by the first pushing operation having an external force equal to or larger than the threshold value.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, .

L: Door lock
1: latch
2: cam 22: first protrusion
23: second projection 24: shoulder portion
25: Pivot shaft 26: Return means
3: slider 31: guide rod
33: first elastic member 35: upper projection
37: side projection
4: Safety lever 41: Guide ball
411: lifting portion 413: side portion
43: second elastic member 45: descending projection

Claims

A latch having a first engaging portion at one end and forward and backward;
A cam having a second engaging part coupled with the first engaging part and rotating when the latch is moved forward and backward;
A slider provided at a lower portion of the cam and having a guide rod at the rear thereof; And
A safety lever having a guide hole for guiding the guide rod;
.

The method according to claim 1,
Wherein the slider is raised by the first elastic member provided at the lower portion, and is pressed down by the cam to be lowered.

The method according to claim 1,
The guide ball
And a side portion that is horizontally protruded from the elevating portion.

The method according to claim 1,
Wherein the cam includes a first projection and a second projection that are spaced apart from each other at a lower end,
Wherein an upper portion of the slider is in contact with the first projection.

5. The method of claim 4,
The slider further includes an upper projection provided on the upper portion and a side projection provided on the side portion,
Wherein the first projection of the cam contacts the upper projection and the second projection of the cam contacts the side projection.

6. The method of claim 5,
Wherein the upper projection includes a first inclined portion formed at a front side to make a first contact with the first projecting portion of the cam and a second inclined portion formed at a rear side to make a rear contact.

The method of claim 3,
And a stop means including a detent protrusion provided on the side of the guide hole of the safety lever and a stop groove provided on the guide rod side of the slider.

8. The method of claim 7,
The cam further includes a shoulder portion provided on one side,
Wherein the safety lever is raised by a second elastic member provided at a lower portion and is lowered by a downward protrusion which is pressed against the shoulder portion.

5. The method of claim 4,
Wherein the cam includes a recess portion formed at one side end of the second projection and a third projection formed on the recess portion,
The slider includes a release pin that moves up and down along a guide groove formed on a side portion thereof and is lowered by pressing of the third projection of the cam, and a release pin coupled to the release pin, And a locking lever for releasing the locking lever,
Wherein the slider further includes a lift-up side protrusion provided on a side portion and having a position restoring portion provided at a lower portion thereof and contacting an upper portion of the locking protrusion formed on the safety lever.

Locking means for locking the door by the primary pressing operation of the user;
First unlocking means for unlocking the door by a user's pulling operation; And
Second unlocking means for unlocking the door by a second pressing operation of the user in a locked state of the door;
.

11. The method of claim 10,
The locking means
A latch which is advanced by the user's pressing operation,
A first protrusion provided at a lower portion of the cam coupled with the latch and pivoted by advancement of the latch,
An upper protrusion provided on an upper portion of the slider provided at the lower portion of the cam and lowered by contact with the cam,
And a first elastic member provided below the slider.

11. The method of claim 10,
The first releasing means
A latch that is retracted by the user's pulling action,
A first projection provided on a lower portion of the cam that is coupled with the latch and is rotated by the backward movement of the latch,
An upper protrusion provided on an upper portion of the slider provided at the lower portion of the cam and lowered by contact with the cam,
And a first elastic member provided below the slider.

11. The method of claim 10,
The second releasing means
A latch which advances by the user's second pressing operation in the locked state of the door,
A second projection provided on a lower portion of the cam coupled with the latch and pivoted by advancing the latch,
A side projection provided on a slider side portion provided at a lower portion of the cam and lowered by contact with the cam,
A first elastic member provided below the slider,
A guide rod provided on a rear surface of the slider,
And a guide hole provided in a safety lever coupled to the rear of the slider and guiding the guide rod, the guide hole having a vertically formed elevation part and a horizontally protruded side part in the elevation part.

14. The method of claim 13,
The second releasing means
And stop means formed of a detent projection provided on the side of the guide hole and a stop groove provided on the guide rod side.

15. The method of claim 14,
The temporary engagement between the detent projection and the stop groove
Wherein a shoulder portion provided on one side of the cam is released by an operation of pressing a downward protrusion protruded forward from the safety lever.

11. The method of claim 10,
Lock holding means for holding the locked state of the door by the first pressing operation of the user; And
Lock releasing means for releasing the lock holding state from the locked state of the door to cause the second releasing means to operate;
Further comprising a door lock mechanism.

17. The method of claim 16,
The lock holding means includes a recess portion formed at one end of the first projecting portion of the cam and a third projecting portion formed on the recess portion and a guide groove formed on the side wall of the slider, And a locking lever which is coupled to the releasing pin and is pivotally moved by lifting and lowering the releasing pin to restrain or restrain the safety lever.

17. The method of claim 16,
The unlocking means
A second projecting portion of the cam, and a lift-up type side projection provided on the slider side portion,
Wherein the lift-up type side projection has a position restoring portion provided at a lower portion thereof and contacting the upper portion of the locking projection of the safety lever.