JP3071682B2 - Refrigerator door lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock device for a refrigerator capable of releasing a locked state of a door from the inside. Even if the door is locked in the refrigerator, the door can be opened very easily and reliably by one-touch operation, and the accident of locking in the refrigerator can be reliably prevented.

[0002]

2. Description of the Related Art A large refrigerator is usually provided with a locking device for locking a closed door so as not to be opened. Particularly in a large-sized refrigerator for business use, a locking device is generally installed. By the way, in the case of commercial refrigerators, it is common to work inside the refrigerator in order to put in and out of the refrigerator and to arrange the refrigerator in the refrigerator. The lock may be accidentally locked from the outside during operation, and the operator may be locked in the refrigerator. The inside of the refrigerator is very cold,
In addition, because of the closed space, it is extremely dangerous if an operator is trapped in the refrigerator.

In order to avoid such danger,
Usually, as a locking device of a refrigerator, a locking device configured to be unlocked from the inside even if locked from the outside is adopted. Such a lock device can be unlocked from the inside of the refrigerator without a key.

[0004]

By the way, the conventional door lock device is designed so that a part which should be unlocked by a key operation can be unlocked without a key from the inside of the refrigerator. Is very complicated.

[0005] In addition to the complicated structure, the unlocking operation becomes very complicated, and usually requires a plurality of operations. If the procedure of the lock operation is forgotten, the door cannot be opened from the inside of the refrigerator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a refrigerator door lock device which has a simple structure and can be easily unlocked from the inside of the refrigerator. It is an object. The door lock device according to the present invention can reliably prevent a trapping accident that has frequently occurred in the past by applying the door lock device to a refrigerator.

[0007]

According to a first aspect of the present invention, there is provided a door lock apparatus for a refrigerator, wherein a lock piece is protruded and retracted from one end of the casing by being moved in the casing. A lock block that locks the door of the refrigerator with the lock piece protruding from the casing, a handle provided on the casing, and operating the lock piece to protrude and retract, and the lock In a refrigerator door lock device comprising a locking means for locking a state in which the piece protrudes to the outside and an emergency unlocking means for unlocking the locking by the locking means from the inside of the refrigerator, the lock piece is externally attached to the casing. Movement preventing means for preventing movement of the lock block in a protruded state is provided therein, and the locking means includes:
The movement of the lock block is prevented by the operation of the movement prevention means by the locking operation, and the movement inhibition of the lock block is released by the reverse operation of the movement prevention means by the unlocking operation, and the emergency lock release is performed. The means has an operation part protruding inside the refrigerator, and by operating this operation part, the movement blocking state of the lock block by the locking means is released,
The lock piece is configured to be immersed in the casing, and the lock block is slidably mounted in the casing in a longitudinal direction, and is orthogonal to a moving direction and a rearwardly facing stopper surface. The movement preventing means is formed by a locking plate positioned in the casing such that a front edge thereof is opposed to the stopper surface, and the emergency unlocking means is configured to press the operating portion to press the operating portion. An unlocking rod is provided for releasing the abutment of the front edge of the locking plate against the stopper surface and moving the lock block so that the lock piece enters the casing, and the locking plate is parallel to the stopper surface. The lock block has a contact body extending in a direction parallel to the stopper surface, the lock block being rotatable about a first axis, Second parallel to the stopper surface within
An unlocking piece that is rotatable about an axis is provided, and the unlocking piece partially abuts the contact body and another part abuts the locking plate, and in one direction. The rotation of the locking plate about the first axis by the rotation about the second axis releases the stop of the front end against the stopper surface, and the contact member so that the lock piece is immersed in the casing. And the unlocking rod is attached to the casing so that the unlocking piece can be rotated in one direction by pressing the operating portion. .

According to the refrigerator door lock device, the casing is fixed to one of the refrigerator door and the wall surface of the refrigerator main body corresponding to the door, and the other is provided with a hook member corresponding to the lock piece of the lock block. As a result, the door lock device is attached to the refrigerator. Then, the locked state of the refrigerator door is maintained by locking the lock piece to the hook member by a predetermined handle operation while the door is closed, and by performing a predetermined handle operation on the locked door, the door is closed. Can be opened.

Further, the door is closed, and the locking operation is performed by the locking means in a state in which the locking piece is locked to the hook member, whereby the movement of the lock block in the casing is prevented, whereby the door is locked. In contrast, by performing the unlocking operation, the movement inhibition of the lock block in the casing is released, and the door is unlocked.

[0010] Even if the lock block in the casing is prevented from moving by the locking operation, the operation of the emergency unlocking means is operated by operating the operating part of the emergency unlocking means from inside the refrigerator. Is given priority, and the lock block's movement prevention state is released.
The door can be opened from inside the refrigerator.

In addition, the emergency lock release means can release the lock block movement inhibition by only one operation, and can release the lock state by the lock piece. Therefore, the conventional lock release means is complicated. It is not necessary to perform the operation, the operation can be performed quickly and reliably, and the accident of being trapped in the refrigerator can be reliably prevented.

When the lock block is prevented from moving in the casing by the locking operation,
The front edge of the locking plate abuts against the stopper surface of the lock block, thereby preventing the lock plate from retreating. In this state, by pressing the unlocking rod toward the casing, the abutting state of the front end edge of the locking plate against the stopper surface is released, so that the lock block can be moved rearward. Become.

In a state where the lock block is prevented from moving in the casing by the locking operation,
By pressing the operating part of the unlocking rod in the direction of the casing from inside the refrigerator, the unlocking piece rotates around the second axis,
With this rotation, the locking plate is rotated about the first axis, the stop of the front edge of the locking plate against the stopper surface is released, and the lock block is in a state where it can be retracted. Then, by continuing the pressing operation of the unlocking rod toward the casing, the unlocking piece abuts on the abutting member of the lock block and moves the locking block backward, so that the lock block is retracted. Of the hook member is released,
The door can be opened from inside the refrigerator.

[0014]

FIG. 1 is an exploded perspective view showing an embodiment of a door lock device according to the present invention. FIG.
3 is an assembled perspective view of the door lock device shown in FIG. 1, and FIG. 3 is a perspective view showing an assembled state of the inside. FIG. 4 is a sectional view taken along line AA of FIG. As shown in FIG. 1, the door lock device 1 is a refrigerator door D (FIG. 2).
A bottom cover 3 for closing the bottom surface of the casing 2; a lock block 4 slidably mounted on the casing 2;
A handle 5 for sliding the lock block 4 within the casing 2, a locking plate (movement preventing means) 6 for preventing the lock block 4 from sliding, and a locking plate 6 for preventing the lock block 4 from sliding. A locking means 7 for releasing the lock, an unlocking piece 8 for unlocking the locking block 3 from sliding the locking block 3 by an operation from the back side of the casing 2, and an unlocking rod for operating the unlocking piece 8 ( Emergency lock release means) 9.

The unlocking rod 9 has a proximal end attached to the casing 2 and a distal end protruding behind the door D of the refrigerator, and an operating portion for operating the unlocking rod 9 at the protruding portion. Is formed.

The casing 2 has a horizontally long rectangular parallelepiped casing main body 21 and a pair of blade pieces 22 formed over the entire length of the casing main body 21 on the base end side in the longitudinal direction. . These wing pieces 22 have a predetermined number of mounting holes 22a penetrating therethrough and a predetermined number of tap holes 22b screwed from the back surface. The mounting hole 22a
Inserts the bolt B into the casing 2 of the refrigerator door D
For bolting to the tapped hole 22
b is for fixing the bottom cover 3 to the casing 2.

Also, on one short side (left side in FIGS. 1 and 2) of the casing body 21, a window 23 through which one side (lock piece 42) of the lock block 4 protrudes. However, a handle fitting port 24 for fitting the handle 5 is provided substantially in the rear half (right side in FIGS. 1 and 2) of the top of the casing body 21. Immediately in front of the handle fitting port 24, a circular locking means mounting hole 25 is provided, and a locking means support cylinder 25a extends from the locking means mounting hole 25 toward the inside of the casing body 21.

A sliding contact plate 29 extending in the direction of the bottom cover 3 extending between the mutually facing side walls of the casing body 21 is provided at a portion slightly behind the center of the handle fitting opening 24. Is provided. The bottom edge of this sliding contact plate 29 is abutted against the top surface of the lock block 4 in a sliding contact state,
This stabilizes the forward and backward movement of the lock block 4 in the casing body 21.

On the side walls of the casing body 21 facing each other, a slight wing piece 22
A pair of handle mounting holes 26 facing each other is formed in a portion facing the direction of. A pair of handle lock holes 27 facing each other is formed slightly in front of the handle mounting holes 26. The handle mounting hole 26 allows the handle 5 to be inserted through the support shaft 28.
Is rotatably supported around a support shaft 28, and the handle lock hole 27 is for passing a padlock (not shown) so that the rotation of the handle 5 can be regulated. I have.

The bottom cover 3 is set to have a plane size that can be fitted into the bottom opening of the casing 2. This bottom lid 3
Are a plurality of screw insertion holes 3 corresponding to the tap holes 22b.
1, the screw 31a is inserted into the screw insertion hole 31 in a state where the bottom cover 3 is fitted into the bottom opening of the casing 2, and the bottom cover 3 is screwed into the tap hole 22b and fastened. To be fixed to.

The bottom cover 3 has a mounting hole 2 for the wing piece 22.
A semicircular arc groove 32 is provided in a portion corresponding to 2a,
With the bottom of the bottom cover 3 fixed to the casing 2 by the arc-shaped groove 32, the tip of the bolt B can come out of the mounting hole 22a without any trouble.

The bottom cover 3 has a pair of locking hooks 33 in the width direction at the rear of the surface. This locking hook 33
Is for mounting the locking plate 6,
The base end is integrally fixed to the surface of the bottom lid 3, and the front end is bent forward in a U-shape, whereby the hook groove of the locking hook 33 is opened downward. In addition, a gap is formed in the front so that a part of the locking plate 6 (the locking projection 63) can be fitted into the hook groove. A leaf spring 36 is provided on the surface of the bottom cover 3 for closing the opening of the hook groove of the locking hook 33, thereby preventing the locking plate 6 supported by the locking hook 33 from coming off. I have.

The bottom cover 3 has a pair of width-wise brackets 34 projecting from the surface of the bottom cover 3 behind the locking hooks 33. The pair of brackets 34 are provided with through holes 34a facing each other. Then, a support shaft (second axis) 34b is inserted through the unlocking piece 8 into the pair of through holes 34a and caulked, whereby the unlocking piece 8 is attached to the surface of the bottom lid 3 by the support shaft 34b. Attached so that it can rotate around.

Further, on the longitudinal center line of the bottom cover 3 and between each pair of locking hooks 33 and the bracket 34, a polishing hole 35 is provided. Of the head 91 is penetrated.

The lock block 4 includes a block body 41 having a substantially rectangular parallelepiped outer fitting shape, and a lock piece 42 protruding forward from a tip portion (left side in FIG. 1) of the block body 41. The block main body 41 is formed with a rear extension portion 43 protruding rearward from a rear end portion thereof. When the lock block 4 is fitted into the casing 2, the lock piece 42 is
The length dimension is set so that it can appear and disappear from 3.

The lock piece 42 has a thickness that is set to a size that allows the lock piece 42 to pass through the window 23 of the casing body 21 in a sliding contact state, has a flat portion 42a at the top, and has a An arc portion 42b formed in an arc shape over the bottom is provided. The block body 41 is formed wider than the lock piece 42. By doing so, the lock block 4 is provided inside the casing 2, and the block main body 41 is prevented from coming out of the window 23 with the lock piece 42 protruding outside from the window 23.

The block main body 41 is fitted into the casing main body 21, and the bottom surface thereof slides on the surface of the bottom lid 3 with the bottom lid 3 attached to the casing 2.
Thus, the shape and dimensions are set so that the casing 2 can be moved back and forth. Such a block main body 41 has a first side plate 41a and a second side plate 41b formed parallel to each other and formed rearward from a substantially central portion thereof.

Each of the side plates 41a and 41b has a thinner front portion and a thicker rear portion, and is disposed between the side plates 41a and 41b of the thin portion from the bottom to the top. A first escape hole 41c in the shape of a square hole penetrating through is formed. Also, both side plates 41 of the thick portion
The second escape hole 41d is formed between the holes 41a and 41b.

The first escape hole 41c is for externally fitting the locking means support cylinder 25a in a state where the lock block 4 is fitted in the casing 2, so that the locking means supporting cylinder 25a can be externally fitted. And the front and rear dimensions are set so that the block body 41 does not interfere with the locking means support cylinder 25a even when the lock block 4 moves back and forth. Also, the second escape hole 41d
Is for inserting a part (operation rod 54) of the handle 5 in a state of being attached to the casing body 21.

The bottom of the block body 41 has a first
In the portion corresponding to the escape hole 41c, the block body 41
A first bottom surface concave portion 44 cut from the bottom surface of the first bottom surface is provided, and a second bottom surface concave portion 45 is provided at a portion corresponding to the second escape hole 41d. The second bottom recess 45 is formed at a position higher than the first bottom recess 44 with reference to the bottom surface of the block body 41, whereby a step is formed at the boundary between the first bottom recess 44 and the second bottom recess 45. The surface perpendicular to the bottom surface of the step forms a stopper surface 46 that abuts a part (the locking edge 61c) of the locking plate 6.

A spring mounting groove 41e extending in the front-rear direction is provided in front of the block main body 41. A rear wall surface of the lock piece 42 in the spring mounting groove 41e and an outer peripheral surface of a locking means support cylinder 25a described later. Between the coil spring 4
By mounting the lock 8, the lock block 4 is constantly pressed forward in the casing 2, and the lock piece 42 is in a state of protruding outside from the window 23.

The rear extending portion 43 has a third side plate 43a extending rearward from the first side plate 41a of the block main body 41 and a third side plate 43a extending rearward from the second side plate 41b. And four side plates 43b. The surfaces of the protruding plates 43a and 43b facing the bottom lid 3 are inclined upward from the boundary with the block main body 41 toward the top, and a cylindrical body (abutment) is formed integrally with the tapered rearmost portion. Body) 43c is cross-linked. The cylinder 43c is pressed by the unlocking piece 8, and the pressing causes the lock block 4 to move rearward.

Also, on the top of each of the projecting plates 43a, 43b,
A longitudinal movement allowing groove 43d extending in the longitudinal direction is recessed. The front-rear movement allowable groove 43d is provided in the casing main body 2.
The dimensions are set so as to come into contact with the sliding contact plate 29 provided in the inside 1. Thus, the lock block 4 can be moved back and forth without swinging in the casing body 21.

The rear extending portion 43 is provided on the block body 4.
An operation piece 47 is provided in a portion near the bottom cover 3 between the protruding plates 43a and 43b at a boundary position with respect to 1. This operation piece 4
The position 7 is set so that the tip of the operating rod 54 comes into contact with the operating rod 54 of the handle 5 fitted in the second escape hole 41d of the block body 41.

The handle 5 includes a grip portion 51 that is gripped and operated, a front protruding piece 52 extending forward of the grip portion 51, and a connecting portion between the front protruding piece 52 and the grip portion 51. Bearing portion 53 bulging in the direction of lock block 4
And an operating rod 54 further protruding from the bearing portion 53 in the direction of the lock block 4. A through-hole 53a is formed in the bearing 53, and the support shaft 28 is inserted through the handle mounting hole 26 of the casing body 21 and the through-hole 53a in a state where the bearing 53 is fitted into the handle fitting opening 24. By caulking, the handle 5 is rotatable around the support shaft 28.
So that it is attached to

The locking plate 6 includes a plate body 60 bent in an arc shape, a front plate 61 extending forward from a front end of the plate body 60, and a rear end of the plate body 60. The rear plate 62 is formed to extend rearward to the portion, and is formed by a locking protrusion (first axis) 63 protruding from both sides of a substantially central portion of the plate body 60 in the longitudinal direction. Have been.

The front plate 61 includes a plate body 6
The stopper plate 61a includes a stopper plate 61a connected to the front end portion of the "0" and a triangle plate 61b protruding forward from the center of the front end edge of the stopper plate 61a. The width of the base plate of the triangle plate 61b is set to be shorter than the width of the stopper plate 61a, so that the front end of the stopper plate 61a has a pair of locking edges in the width direction. A front edge 61c is formed. The rear half of the plate body 60 and the rear plate 62 have elongated holes 64 extending in the front-rear direction.
The front portion of the unlocking piece 8 can be fitted into the long hole 64.

When the bottom cover 3 is mounted on the casing 2 with the pair of locking projections 63 locked on the locking hooks 33 of the bottom cover 3, the locking plate 6 can be moved forward. The dimensions are set such that the plate 61 faces the bottom surface of the first bottom surface concave portion 44 of the block main body 41 and the rear plate 62 is located at a rear end portion in the casing main body 21 with a slight space therebetween.

The locking plate 6 is connected to the locking hook 33.
In this state, the locking projection 63 is pressed against the inner part of the hook groove by the urging force of the leaf spring 36, whereby the plate main body 60 is set to be substantially parallel to the bottom cover 3. ing. Therefore, when an external force is applied to rotate the locking plate 6 around the locking projection 63, the locking plate 6 rotates in the direction of the force, but when the external force disappears, the plate main body 60 returns to the original horizontal position. It returns to the posture.

Then, the lock block 4 is
In the state where the lock piece 42 projects outside through the window 23 of the casing main body 21 as shown in FIGS.
The locking end edge 61c of 1a can abut against the stopper surface 46 of the block main body 41. In this abutting state, the lock block 4 enters a so-called locked state in which the lock block 4 is prevented from entering the casing 2. Like that. Therefore, the lock plate 4 is rotated inside the casing 2 by rotating the locking plate 6 clockwise around the axis of the locking projection 63 to release the locked state between the long hole 64 and the stopper plate 61a. You can move backward.

The locking means 7 includes the casing body 2
The lock cylinder 71 is formed to include a lock cylinder 71 which is fitted into the lock means support cylinder 25a in a sliding contact state, and a rotation restricting piece 72 protruding in a radial direction at an appropriate position of the lock cylinder 71. The rotation restricting piece 72 normally projects in the radial direction to
Are restricted from rotating about the center line. A key hole 73 into which the key K is inserted is provided on the top surface of the lock cylinder 71. By inserting the key K into the key hole 73, the rotation restricting piece 72 is fixed to the lock cylinder 71 by a predetermined size.
And thereby the rotation restriction is released. Therefore, by inserting the key K into the keyhole 73 and turning it around the center line of the lock cylinder 71 in a predetermined direction, the lock cylinder 71 rotates around the center line.

The lock cylinder 71 is provided at its tip end (the bottom cover 3).
(Side) has a plate operating section 74 that is cut diagonally. FIG. 5 shows a plate operation unit 74 and a front plate 61.
7A is a perspective view showing a positional relationship with the triangle plate 61b, (a) is a state where the lock block 4 is locked,
(B) shows a state where the lock of the lock block 4 is released. First, as shown in FIG. 5A, when the lock block 4 is locked,
The tip of the triangle plate 61b enters the locking cylinder 71 from the oblique cut of the plate operating portion 74, and the stopper surface 46 of the block body 41
Of the lock block 4 is prevented from retreating.

When the key K is inserted into the keyhole 73 and turned in a predetermined direction in the state shown in FIG.
The plate operating section 7 is slid in contact with the rotation of the
4 moves the edge of the triangle plate 61b toward the distal end of the plate operating portion 74, so that the locking plate 6 rotates clockwise around the locking projection 63 and the locking edge 61c.
The contact state between the lock block 4 and the stopper surface 46 is released, and the lock block 4 is in a state in which it can retreat.

Accordingly, by inserting the key K into the keyhole 73 and turning it in a predetermined direction, and then grasping the grip 51 and operating the handle 5 in the counterclockwise direction in FIG. Rotating clockwise, the operating rod 5
4 pushes the operation piece 47 (FIG. 3) backward, the lock block 4 retreats, whereby the lock piece 42 enters the casing 2, and as shown by the two-dot chain line in FIG. The lock on the door D of the refrigerator is released.

Then, the door D of the refrigerator is opened by pulling the handle 5 toward the operator as it is in the unlocked state. Then, when the hand is released from the handle 5, the lock block 4 is moved forward by the urging force of the coil spring 48, and the operation rod 54 is pressed by the operation piece 47 by this movement, whereby the handle 5 is moved.
Pivots around the support shaft 28 in the clockwise direction shown in FIG. 4, whereby the lock piece 42 projects outward from the window 23 as shown by the solid line in FIG. It returns to the original storage position.

The unlocking piece 8 includes a shaft support 81 having a shaft hole 81a, an unlocking operation piece 82 projecting forward from the shaft support 81, an unlocking operation piece 82, and the shaft support 81. 8
A pair of operation pins 83 erected on both sides of a boundary portion with the operation pin 1
And is formed from The support shaft 34b is inserted into the through hole 34a and the shaft hole 81a in a state where the shaft support portion 81 is mounted between the brackets 34 of the bottom cover 3, and the support shaft 34b
The unlocking piece 8 is rotatably supported around the support shaft 34b by caulking the distal end of the lock piece.

The unlocking operation piece 82 is formed in a triangular shape having a tapered top side, and a long hole 64 of the locking plate 6 and each protruding plate 43a, between the top end 82a and the rear base end.
43c of the lock block 4 through the gap of 43b
Are formed with inclined surfaces 82b opposed to each other in a separated state.
Then, by rotating the unlocking piece 8 counterclockwise in FIG. 3 around the support shaft 34b, the inclined surface 82b comes into contact with the cylindrical body 43c. A concave portion 82c extending in the front-rear direction is formed on the bottom surface of the unlocking operation piece 82, and the head 91 of the unlocking rod 9 inserted into the casing 2 from the polishing hole 35 is provided on the bottom surface of the concave portion 82c. It is dimensioned to touch.

On the other hand, the operation pins 83 are set so as to abut on the plate body 60 of the locking plate 6 at a portion behind the locking projection 63. And unlocking piece 8
Is rotated counterclockwise (FIG. 3) about the support shaft 34b, whereby the locking plate 6 is rotated clockwise about the locking protrusion 63, and thereby the locking edge 61c of the stopper plate 61a and the locking edge 61c. The contact state between the block body 41 and the stopper surface 46 is released.

FIGS. 6 and 7 are explanatory diagrams for explaining the operation of the present invention. FIG. 6A shows a state in which the door D of the refrigerator is locked by the door lock device 1, and FIG. 6B shows a state in which the door D of the refrigerator is operated by operating the unlock rod 9 from inside the refrigerator. Respectively show unlocked states. In addition, FIG.
3B shows a state in which the locking plate 6 prevents the lock block 4 from retreating, and FIG. 3B shows a state in which the locking plate 6 releases the locking block 4 from retreating, and the lock block 4 retreats.

First, the door D of the refrigerator shown in FIG.
In the locked state, the lock piece 42 of the lock block 4 protrudes outside from the window 23 of the casing 2, and the flat portion 42a of the lock piece 42 is locked by the hook member F provided on the outer wall surface of the refrigerator. Thereby, the door D of the refrigerator is not opened.

Further, the triangle plate 61b of the locking plate 6 enters the cylinder of the plate operating portion 74 of the locking means 7 (see FIG. 5A), and the locking edge 61c of the locking plate 6 is locked by the lock block. 4 (FIG. 7 (a)), the lock block 4 is prevented from retreating.

When the unlocking rod 9 is pressed from the inside of the refrigerator (below the paper surface in FIG. 6) in the state shown in FIG. 6A, the unlocking rod 9 is immersed in the casing 2 and thereby unlocked. Since the head 91 of the rod 9 pushes up the bottom surface of the concave portion 82c of the unlocking piece 8, the unlocking piece 8 rotates clockwise around the support shaft 34b. By this rotation, first, the operation pin 83 projecting from the unlocking operation piece 82 is moved to the locking plate 6.
In order to push the rear part upward, the locking plate 6 rotates counterclockwise around the locking projection 63 against the urging force of the leaf spring 36 (FIG. 1), and as a result, FIG. As shown in (5), the stop of the locking edge 61c against the stopper surface 46 is released.

When the unlocking rod 9 is further pressed in this state, the rotation of the unlocking piece 8 causes the inclined surface 82 of the unlocking piece 8 to move.
b comes into contact with the cylindrical body 43c of the lock block 4 and then pushes the cylindrical body 43c backward (FIG. 7 (b)). Then, the lock block 4 is pressed by this pressing.
As shown in FIG. 6B, the lock piece 42 of the lock block 4 is immersed in the casing 2, and the locked state of the lock piece 42 with respect to the hook member F is released.

As described above, according to the above configuration of the present invention, even if the door D of the refrigerator is closed and locked from the outside, the one-touch operation of simply pushing the unlocking rod 9 from the inside of the refrigerator is performed. As the locked state of the refrigerator door D is released, the door D can be easily opened from the inside of the locked refrigerator without performing complicated operations as in the related art, which is extremely effective in safety measures. is there.

[0055]

According to the first aspect of the present invention, there is provided a door lock device for a refrigerator, in which a casing is provided with a movement preventing means for preventing movement of a lock block in a state in which a lock piece protrudes to the outside. The movement of the lock block is prevented by the operation of the movement blocking means by the operation,
It is configured to release the movement inhibition of the lock block by the reverse operation of the movement inhibition means by the unlocking operation, and the emergency unlocking means releases the movement inhibition state of the lock block by the locking means by the operation, and releases the lock piece. Since it is configured to be immersed in the casing, even if the door is locked by the locking operation, by operating the emergency unlocking means from the inside of the refrigerator, there is no need to perform complicated operations as in the past. By retracting the lock block, the lock piece can be immersed in the casing, so that the door can be opened from inside the refrigerator. Therefore, it is extremely convenient for reliably preventing an accident of being trapped in the refrigerator.

The lock block is mounted in the casing so as to be slidable in the longitudinal direction, and has a stopper surface perpendicular to the moving direction and facing backward.
The movement preventing means is formed by a locking plate positioned in the casing such that the front edge faces the stopper surface, and the emergency unlocking means presses the locking plate to the stopper surface of the front edge of the locking plate by pressing. And the lock rod is moved to move the lock block so that the lock piece is immersed in the casing, so that the lock operation prevents the lock block from moving in the casing. The front edge of the locking plate abuts against the stopper surface of the lock block, thereby preventing the lock plate from retreating. In this state, by pressing the unlocking rod toward the casing, the contact state of the front edge of the locking plate with the stopper surface is released, whereby the lock block can be moved rearward. .

The locking plate is provided rotatably about a first axis parallel to the stopper surface, and the lock block has an abutment extending in a direction parallel to the stopper surface. An unlocking piece rotatable about a second axis parallel to the plane is provided, and the unlocking piece partially contacts the contact body and another portion contacts the locking plate. In addition, the locking plate is rotated about the first axis by the rotation about the second axis in one direction to release the stop of the front edge against the stopper surface, and the lock piece is inserted into the casing. The unlocking rod is attached to the casing so that the unlocking piece can be rotated in one direction by pressing the operation unit, so that the locking operation is performed. Lock in the casing by In a state where the lock is prevented from moving, the unlocking piece is rotated about the second axis by pressing the unlocking rod from the refrigerator toward the casing, and this rotation causes the locking plate to rotate. The lock block is rotated about one axis, the stop of the front edge against the stopper surface is released, and the lock block is in a state where it can be retracted. Then, by continuing the pressing operation of the unlocking rod toward the casing, the unlocking piece abuts on the abutting member of the lock block and moves the locking block backward, so that the lock block is retracted. Is released from the hook member, and the door can be opened from the inside of the refrigerator.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a door lock device according to the present invention.

FIG. 2 is an assembled perspective view of the door lock device shown in FIG.

FIG. 3 is a perspective view showing an assembled state of the inside of the door lock device shown in FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 2;

5A and 5B are perspective views showing a positional relationship between a plate operation unit and a triangle plate of a front plate, wherein FIG. 5A shows a state in which a lock block is locked, and FIG. 5B shows a state in which the lock of the lock block is released. Are respectively shown.

FIG. 6 is an explanatory diagram for explaining an operation of the present invention;
(A) shows a state in which the refrigerator door is locked by the door lock device, and (B) shows a state in which the unlocking rod is operated from inside the refrigerator to unlock the refrigerator door by the door lock device. .

FIGS. 7A and 7B are perspective explanatory views for explaining the operation of the present invention, wherein FIG. 7A shows a state in which the locking plate prevents the retraction of the lock block, and FIG. Are released and the lock block is retracted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door lock device 2 Casing 21 Casing main body 22 Wing piece 22a Mounting hole 22b Tapped hole 23 Escaping window 24 Handle fitting port 25 Locking means mounting hole 25a Locking means support cylinder 26 Handle mounting hole 27 Handle locking hole 28 Support shaft 3 Bottom cover 31 screw insertion hole 31a screw 32 arc groove 33 locking hook 34 bracket 34a through hole 34b support shaft (second shaft center) 35 reaching hole 4 lock block 41 block body 41a first side plate 41b second side plate 42 lock piece 42a flat portion 42b Arc part 43 Backward extension part 43a Third side plate 43b Fourth side plate 43c Cylinder (contact body) 43d Forward / backward movement allowable groove 44 First bottom concave part 45 Second bottom concave part 46 Stopper surface 47 Operation piece 48 Coil spring 5 Handle 51 Gripping part 52 Front protruding piece 53 Bearing part 53a Penetration 54 Operating rod 6 Locking plate (movement preventing means) 61 Front plate 61a Stopper plate 61b Triangle plate 61c Locking edge (front edge of locking plate) 62 Rear plate 63 Locking projection (first axis) 64 Length Hole 7 Locking means 71 Locking cylinder 72 Rotation restricting piece 73 Keyhole 74 Plate operating part 8 Unlocking piece 81 Shaft support 82 Unlocking operation piece 82a Tip top 82b Inclined surface 82c Recess 83 Operating pin 9 Unlocking rod (emergency locking and unlocking Means) 91 head B bolt D refrigerator door F hook member K key

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E05B 65/10 F25D 23/02 306

Claims (1)

(57) [Claims] 1. A casing fixed to a refrigerator,
By moving inside the casing,
The lock piece is installed so that
With the piece protruding from the casing, the door of the refrigerator
A lock block to be locked, and a lock block provided on the casing.
Handle for operating the lock piece in and out
And a locking hand for locking a state in which the lock piece projects outside.
Steps and unlocking by this locking means from inside the refrigerator
Door lock device for refrigerators
State in location, to the casing of the lock piece is protruded to the outside
The movement blocking means for blocking the movement of the lock block
The locking means is provided inside and is prevented from moving by a locking operation.
The movement of the lock block is prevented by the operation of the stop means
And the reverse movement of the movement prevention means due to the unlocking operation.
The lock block will be released
The emergency unlocking means is located inside the refrigerator.
Operating unit that protrudes from the
Therefore, the movement of the lock block by the locking means is prevented.
Release the lock state and insert the lock piece into the case.
Is configured to retracted into the ring, the locking block is slid in the longitudinal direction in a casing
Is mounted as possible and perpendicular to the direction of travel.
A rearwardly facing stopper surface, wherein the movement inhibiting means is provided.
Is the casing so that the front edge faces the stopper surface.
Formed by a locking plate positioned in the upper
The emergency unlocking means is provided by pressing the operation unit.
Contact of the front edge of the locking plate with the stopper surface.
Releases contact and lock pieces enter the casing
Equipped with an unlocking rod that moves the lock block
The locking plate is rotatably provided around a first axis parallel to the stopper surface, and the lock block has a contact body extending in a direction parallel to the stopper surface, and is provided in the casing. Is provided with an unlocking piece that is rotatable about a second axis parallel to the stopper surface. The unlocking piece partially contacts the contact body and the other unlocking plate includes And the locking plate is rotated about the first axis by rotation about the second axis in one direction to release the front edge against the stopper surface. The unlocking rod is configured to move the contact body so as to be immersed in the casing, and the unlocking rod is attached to the casing so that the unlocking piece can be rotated in one direction by pressing the operation unit. Door locks for refrigerators Apparatus.