JPH108810A - Door lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a door compact and assure holding capability with a latch. SOLUTION: This mechanism comprises; a case 6 which a front opening 6a, and an locking tool 3 for locking and releasing a door 7 relative to the case 6 and disposed between the case 6 and the door 7 having a extending portion 7a projecting downward from the bottom surface 6b of the case 6 and capable of opening and closing the front opening 6a. The locking tool 3 compresses, a seat 15 having a hook receiving portion 15a and disposed on the bottom surface 6b of the case 6, and a latch 16 having a hook 16a capable of engaging with and disengaging from the hook receiving portion 15a and pivoted for free rotation on the reverse side of an extended portion of the door 7, and a hollow space 16b capable of accommodating the seat 15. Of the above components, the latch 16 by means of a spring 5 energizes the hook 16a in the direction of lock under the state of the door 7 being closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock mechanism suitable for use in, for example, a hanging cabinet installed above a kitchen sink.

[0002]

2. Description of the Related Art In general, a hanging door shelf is known which is provided with a shelf body which is opened forward and can store cooking utensils and the like, and a door which can open and close a front opening of the shelf body.

In such a cabinet, the handle for opening and closing is not exposed to the front surface of the door, but the edge of the door is projected downward from the shelf main body for reasons such as a favorable appearance. It is used as a handle.

[0004] A lock mechanism for releasing the locked state of the door and the shelf body when the door is opened and locking the door to the shelf body when the door is closed is usually provided behind the projecting portion of the door. .

Conventionally, various lock mechanisms have been employed as a lock mechanism for this type of door, for example, as shown in FIG. 12 and FIG. This will be described with reference to FIG.
1 and a latch 103 having a latch 102.

The seat 101 is formed of a substantially J-shaped cross-section receiving member having a hook receiving portion 101a and a seat mounting portion 101b, and a bottom surface 104a of a shelf body 104 having a front opening.
Are fixed by mounting screws 105.

The latch 102 comprises a substantially S-shaped plate-like holding member having a hook 102a which can be disengaged from the hook receiving portion 101a and an operating portion 102c connected to the hook 102a via a pivot 102b. The door 106 is rotatably supported via a pedestal 107 on the back side of an extension 106 a projecting from the lower edge of the door 106.

When the door 106 is closed by the torsion spring 108, the latch 102
2a is urged in a direction for locking the hook receiving portion 101a.

Note that on the hook back side of the latch 102,
A guide surface 102d for relatively guiding the hook receiving portion 101a by opening and closing the door 106 is formed.

In order to lock the door 106 to the shelf main body 104 in the door locking mechanism configured as described above, FIG.
Arrow the door 106 relative to the shelf body 104 as shown in a ₁
This is done by closing the door in the direction.

[0011] That is, when the displacement of the door 106 in the arrow a ₁ direction, the tip portion of the hook receiving portion 101a is the guide surface 102
Since the latch 102 is relatively pressed and displaced along the arrow d, the latch 102 moves against the arrow b ₁ against the resilience of the torsion spring 108.
Rotate in the direction. Then, when the further displacement of the door 106 in the same direction, the pressing state of the guide surface 102d of the hook receiving portion 101a is released, the latch 102 is rotated in the arrow b ₂ direction by the repulsive force of the torsion spring 108 The hook 102a is locked to the hook portion 101a.

On the other hand, in order to release the door 106 from the shelf main body 104, as shown in FIG.
Pressed in _one direction, carried out by the door opening the door 106 in the arrow a ₂ direction relative to the shelf body 104.

That is, the operation unit 102c is brought forward (see FIG. 13).
Is pressed in the arrow b ₁ direction), the latch 102 is a torsion spring as shown by the two-dot chain line in FIG. 13 1
It rotated in the arrow b ₁ direction against the resilience of 08, the hook 1
02a is detached from the hook receiving portion 101a and the hook 102
a is released from the hook receiving portion 101a. Then, while the door 106 presses the operating portion 102c arrow a ₂
Displace in the direction.

[0014]

By the way, in the conventional door locking mechanism, the hook 102a and the operating section 102 are not provided.
c, the pivot 102b is interposed between
That is, since the formation positions of the hook 102a and the operation portion 102c are set at positions that are separated from each other,
There is a problem that the longitudinal dimension of the door 02 becomes large and the door 106 becomes large.

Further, since the latch 102 is formed by a plate-shaped holder, the area where the hook 102a can be locked to the hook receiving portion 101a is narrowed, and the holding ability cannot be sufficiently guaranteed. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide a door locking mechanism that can reduce the size of a door and sufficiently guarantee a holding ability. It is.

[0017]

In order to achieve the above object, a door lock mechanism according to a first aspect of the present invention includes a housing having a front opening and an extension projecting downward from a bottom surface of the housing. A locking member that is disposed between the door and a door that can open and close the front opening and that engages and disengages the door with respect to the housing; and the locking device is provided on a bottom surface of the housing. A hook having a hook receiving portion and a latch having a space rotatably supported on the back side of the extending portion of the door and rotatably supported by the hook receiving portion and a space capable of storing the receiving seat; The latch is biased by a spring in a direction in which the hook is locked to the hook receiving portion when the door is closed. Therefore, the locking of the door to the housing is performed by closing the door to the housing. At this time, the receiving seat faces the space of the latch due to the turning operation of the latch in the hook locking direction, and
The hook is locked in the hook receiving portion. On the other hand, when the door is removed from the housing, the latch is rotated by pressing the hook,
This is performed by opening the door from the housing. At this time,
The pivotal movement of the latch in the hook anti-locking direction exposes the receiving seat to the outside of the latch space, and releases the locked state of the hook and the hook receiving portion.

According to a second aspect of the present invention, in the door lock mechanism of the first aspect, the hook comprises a hook that also serves as an operation unit. Therefore, when the hook is pressed as the operation unit when the door is opened, the latch rotates in the hook anti-locking direction.

According to a third aspect of the present invention, in the door lock mechanism according to the first or second aspect, a guide surface which is connected to the hook receiving portion and which can guide the latch by opening and closing the door is formed in the seat. There is a configuration. Therefore, when the door is displaced in the closing direction at the time of closing the door, the latch is rotated in the counter-biasing direction of the spring while the hook is pressed and displaced along the guide surface, and when the door is further displaced in the closing direction, the hook and the guide surface are displaced. The latch is rotated in the biasing direction of the spring by the release of the pressing, and the hook is locked in the hook receiving portion. On the other hand, when the door is opened and the latch is rotated in the direction opposite to the bias of the spring and the door is displaced in the door opening direction, the locked state of the hook and the hook receiving portion is released.

According to a fourth aspect of the present invention, in the door lock mechanism according to the first, second, or third aspect,
The seat is provided on the bottom surface of the housing via an illumination light shielding plate. Therefore, the catch of the locking tool is provided behind the illumination light shielding plate located below the bottom surface of the housing.

According to a fifth aspect of the present invention, in the door lock mechanism according to the first, second, or third aspect,
It is arranged by attaching the seat to the housing so that it can be adjusted,
The latch is provided with an opening window such that the adjustment mounting portion of the seat faces the opening surface when the door is closed. Therefore, in the closed state of the door, the receiving seat is attached to the housing while being adjusted from the opening window.

According to a sixth aspect of the present invention, in the door lock mechanism of the fifth aspect, the adjustment mounting portion is formed of a long hole for inserting a mounting screw extending in a depth direction of the housing. Therefore, the mounting position of the seat is adjusted along the depth direction of the housing within the opening dimension range of the elongated hole.

According to a seventh aspect of the present invention, in the door lock mechanism according to the first, second, or third aspect,
The seat is provided with a seat mounting portion protruding to the side opposite to the door, and the hook mounting portion has a notch formed in the hook when the latch and the seat are locked. Therefore,
The catch mounting portion of the catch faces the notch of the hook, and the latch is locked to the catch.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are a sectional view and an exploded perspective view showing a door lock mechanism according to a first embodiment of the present invention. In FIG. 1, a lock mechanism denoted by reference numeral 1 includes a pedestal 2, a lock 3, a shaft 4, and a spring 5.

The lock mechanism 1 comprises a housing 6 such as a cabinet or a hanging cabinet having a front opening 6a,
And a door 7 which has an extending portion 7a protruding below the bottom surface 6b and which can open and close the front opening 6a. The door 7 has a front opening 6 a at one side edge of the housing 6.
Is rotatably supported by the opening side edge of the opening.

The pedestal 2 is fixed by two mounting screws 8 on the back side of the extension 7a of the door 7 on the side opposite to the pivotal support of the door. The pedestal 2 includes a mounting plate 9 which is in contact with the back surface of the extending portion 7a, two right and left holding plates 10 and 11 which are integrally formed on the opposite side of the mounting plate 9 and which are opposed to each other. There are provided two upper and lower stoppers 12 and 13 which are interposed between the plates 10 and 11 and located at the latch rotation position.

On both side edges of the mounting plate 9, there are provided elongated holes 14, 15 extending vertically and through which the mounting screws 8 are inserted. Upper and lower stoppers 12, 13 are provided at the lower edge of the mounting plate 9.
A recess 14 having a spring receiving surface 14a is provided by cutting out a part of the lower stopper 13 among them.

The holding plates 10 and 11 are provided with holding holes 10a and 11a facing the respective ends of the shaft 4.

The upper stopper 12 of the upper and lower stoppers 12, 13 has a stop surface 12a parallel to the mounting surface of the mounting plate 9 (the back surface of the door 7). On the other hand, the lower stopper 13 is formed with a stopper surface 13a having a gradient that decreases in a direction away from the rear surface of the door 7.

The locking member 3 includes a receiving seat 15 and a latch 16, and is configured so that the door 7 can be disengaged from the housing 6.

The seat 15 has a stepped through hole 17 for mounting the seat.
And is fixed to the bottom surface of the housing 6 by two mounting screws 18. Seat 1
5 is provided with a hook receiving portion 15a exposed on the side opposite to the door 7 and a guide surface 15b connected to the hook receiving portion 15a and capable of guiding the latch 16 by opening and closing the door 7.

The hook receiving portion 15a is formed by a steep slope having a steep slope descending from the upper end portion toward the rear, so that a hook-lockable area described later is widened. The guide surface 15b is formed as a curved surface that rises forward from the hook receiving portion 15a.

On the other hand, the latch 16 is formed of a bottomed box that opens upward, and is rotatably supported by the shaft 4 that is perpendicular to the pivot shaft (not shown) of the door 7. Thus, in the latched state, the door 7 does not open even if the hook receiving portion 15a has an inclined surface perpendicular to the bottom surface 6b of the housing 6.

The latch 16 is provided with a hook 16a that also functions as an operation unit and is detachable from the hook receiving unit 15a and a space 16b that can accommodate the receiving seat 15. Of these, on the back side of the hook 16a, an inclined surface having a slightly gentler gradient than the gradient of the hook receiving portion 15a is formed. Thus, when the latch 16 is locked to the seat 15, the gap G between the hook receiving portion 15a and the hook 16a becomes slightly wider below the bottom surface 6b of the housing 6 as shown in FIG. Are formed. The shape and size of the hook 16a are set in consideration of the fact that a worker's finger is hooked.

A stopper surface 19 corresponding to the stopper surface 12a is formed at the upper end of the latch 16 on the pivotal side, and a lower end corresponding to the stopper surface 13a and having a gentler slope than the stopper surface 13a. A stopper surface 20 having a gentle gradient is formed. As a result, the rotation of the latch 16 is restricted within the range of rotation between the two stopper surfaces 19 and 20, preventing the latch 16 from being damaged by the collision of the latch 16 with the bottom surface 6b of the housing 6 and preventing the latch 16 from opening when the door is opened. In this case, the operability of the latch 16 is improved.

At the center of the latch 16 in the width direction on the pivotal side, a spring receiving recess 21 having a spring receiving surface 21a and opening on the latch bottom surface is provided. In addition, the latch 16 is provided with a shaft insertion hole 22 that opens into the recess 21 and through which the shaft 4 is inserted in the latch width direction.

The shaft 4 is formed of a round bar for pivotally supporting the latch 16, is inserted into the shaft insertion hole 22, and both ends face the respective holding holes 10a, 11a.
Is held in.

The spring 5 is composed of a torsion spring having a straight portion 5a and a bent portion 5b at each end. The winding portion 5c is housed in the concave portion 21 and is mounted around the shaft 4, and 5a and the bent portion 5b are locked to the spring receiving surfaces 14a and 21a, respectively. As a result, the latch 16 moves the hook 16a when the door 7 is closed.
Is urged in the direction of locking the hook receiving portion 15a.

[0039] In the lock mechanism of the thus constituted door, to lock the door 7 relative to the housing 6 closing the door 7 in the arrow A ₁ direction to the housing 6 as shown in FIG. 2 It is done by doing.

[0040] That is, when the displacement of the arrow A ₁ direction the door 7 by rotation operation, the tip portion of the hook 16a is guiding surface 15
for pressing the b, the latch 16 is rotated in the arrow B ₁ direction against the resilience of the spring 5. When the door 7 is further displaced in the same direction, the guide surface 15b of the hook 16a is moved.
Since the pressed state of the is released, the latch 16 is rotated in the arrow B ₂ direction by the repulsive force of the spring 5, seat 15
Faces the space 16b, and the hook 16a is locked by the hook receiving portion 15a.

On the other hand, to release the door 7 from the housing 6,
Pressing the hook 16a in the arrow B ₁ direction, as shown in FIG. 1, carried out by the door opening the door 7 in the arrow A ₂ direction relative to the housing 6.

[0042] That is, when pressing the hook 16a forward (arrow B ₁ direction in FIG. 1), and rotated in the arrow B ₁ direction against latch 16 is in the repulsive force of the spring 5, as shown in FIG. 1, The hook 16a is disengaged from the hook receiving portion 15a, the locked state between the hook 16a and the hook receiving portion 15a is released, and the receiving seat 15 is exposed outside the space 16b. Then, displacing the left door 7 presses the hook 16a, as shown in FIG. 3 in the arrow A ₂ direction.

Next, second to fifth embodiments of the present invention will be described with reference to the drawings. (Second Embodiment) FIGS. 5 to 7 are a sectional view, a perspective view, and an exploded perspective view showing a door lock mechanism according to a second embodiment of the present invention, which are the same as FIGS. The same reference numerals are given to the members described above, and the detailed description is omitted. In the figure, the seat 31 is composed of a seat body 32 and a seat mounting portion 33, and is fixed to the bottom surface of the housing 6 by mounting screws 35, 36 via an illumination light shielding plate 34 having a rectangular cross section in a sectional view. Have been.

The seat main body 32 has a stepped seat mounting through hole 32 a corresponding to the mounting screw 35, and the illumination light shielding plate 34.
Is formed by a block-shaped body that is in contact with the lower end surface 34a. The receiving body 32 is provided with a hook receiving portion 32b exposed on the opposite side to the door 7 and a guide surface 32c connected to the hook receiving portion 32b and capable of guiding the latch 16 by opening and closing the door 7. .

The hook receiving portion 32b is formed by a steeply inclined surface which descends rearward from the upper end portion, whereby the area where the hook 16a can be locked is widened.
The guide surface 32c is formed as a curved surface that rises forward from the hook receiving portion 32b.

The seat mounting portion 33 is provided integrally with the seat main body 32, and has a mounting screw 36 having a corresponding seat mounting through hole 33 a and a plate that comes into contact with the back surface 34 b of the illumination light shielding plate 34. It is formed by a shape.

Therefore, the lock mechanism of the door requires that the catch 31 of the locking member 3 be provided behind the illumination light shielding plate 34 located below the bottom surface of the housing 6 even for a sink with an illumination light source. Used by

In the second embodiment, the operation for engaging and disengaging the door 7 with respect to the housing 6 is performed in the same manner as the operation for engaging and disengaging the door 7 in the first embodiment.

(Third Embodiment) FIGS. 8 to 10 are a sectional view and a perspective view showing a door locking mechanism according to a third embodiment of the present invention. The same reference numerals are given to the members, and the detailed description is omitted. In the figure, a receiving seat 41 is formed of a block-shaped body having an adjusting mounting portion 42, and is provided by being mounted on a bottom surface 6 a of the housing 6 by an adjusting screw 43 so as to be adjustable.

The receiving seat 41 is provided with a hook receiving portion 41a exposed on the side opposite to the door 7 and a guide surface 41b connected to the hook receiving portion 41a and capable of guiding a later-described latch by opening and closing the door 7. ing.

The hook receiving portion 41a is formed by a steep slope having a steep slope descending from the upper end toward the rear, thereby widening a hook-lockable area described later. The guide surface 41b is formed as a curved surface that rises forward from the hook receiving portion 41a.

The adjustment mounting portion 42 of the seat 41 is formed by an elongated hole extending in the depth direction of the housing 6 and having a mounting screw 43 corresponding thereto. Thereby, the mounting position of the receiving seat 41 is adjusted along the depth direction of the housing 6 within the range of the opening size of the elongated hole.

The latch 45 is provided on the adjustment mounting portion 42 of the seat 41.
Is formed by a box having an opening window 46 facing the opening surface 46a of the door 7 when the door 7 is closed, and opening vertically. Thus, in the closed state of the door 7, the mounting of the receiving seat 41 to the housing 6 allows the tool 47 such as a screwdriver to be opened from below the bottom surface 6 b of the housing 6 through the opening window 46.
It is done while adjusting to face the inside. In addition, opening window 4
The opening size of 6 is not particularly limited as long as it can be attached to the bottom surface of the housing 6 while adjusting the receiving seat 41 in the closed state of the door 7.

The latch 45 is pivotally supported on a shaft 4 perpendicular to a pivot shaft (not shown) of the door 7. Thus, in the latched state, the door 7 does not open even if the hook receiving portion 41a has an inclined surface perpendicular to the bottom surface 6b of the housing 6.

The latch 45 is provided with a hook 45a that can be disengaged from the hook receiving portion 41a and a space portion 45b that can accommodate the receiving seat 41. Of these, on the back side of the hook 45a, an inclined surface having a slightly gentler gradient than the gradient of the hook receiving portion 41a is formed. Thereby, seat 4
8, the gap G between the hook receiving portion 41a and the hook 45a slightly widens downward from the bottom surface 6b of the housing 6 as shown in FIG.
Are formed.

A stopper surface 46 corresponding to the stopper surface 12a is formed at the upper end on the pivot side of the latch 45, and the lower end corresponds to the stopper surface 13a and is gentler than the slope of the stopper surface 13a. A stopper surface 47 having a gentle gradient is formed. As a result, the rotation of the latch 45 is restricted within the range of rotation between the stopper surfaces 48 and 49, so that the latch 45 is prevented from being damaged due to the collision of the latch 45 with the bottom surface 6b of the housing 6, and when the door is opened. The operability of the latch 45 is improved.

A central portion of the latch 45 in the width direction on the pivot side is provided with a spring receiving recess 50 having a spring receiving surface 50a and opening to the latch bottom surface. Further, the latch 45 is provided with a shaft insertion hole 51 which is opened in the concave portion 50 and through which the shaft 4 is inserted in the latch width direction.

In the third embodiment, the operation of engaging and disengaging the door 7 with respect to the housing 6 is performed in the same manner as in the first and second embodiments.
The description is omitted.

(Fourth Embodiment) FIG. 11 shows a fourth embodiment of the present invention.
FIG. 6 is a cross-sectional view illustrating a door lock mechanism according to the embodiment, in which the same members as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted. In FIG.
1 includes a seat body 62 and a seat mounting portion 63, and a housing 6.
Are fixed to two bottom screws 64 by two mounting screws 64 (only one is shown).

The seat main body 62 is formed of a block like the seat main body 32 in the second embodiment. The receiving body 62 is provided with a hook receiving portion 62a exposed on the side opposite to the door 7 and a guide surface 62b connected to the hook receiving portion 62a and capable of guiding a latch described later by the opening and closing operation of the door 7. I have.

The hook receiving portion 62a is formed by a steep slope having a steep slope descending rearward from the upper end portion, thereby widening a hook-lockable area described later. The guide surface 62b is formed as a curved surface that rises forward from the hook receiving portion 62a.

The seat mounting portion 63 extends from the rear end of the seat main body 62 so as to protrude to the side opposite to the door 7. The seat mounting portion 63 is provided with a seat mounting through hole 63 a corresponding to the mounting screw 64.

The latch 64 is formed of a bottomed box that opens upward, and the shaft 4 that is perpendicular to the pivot shaft (not shown) of the door 7.
Is pivotally supported with respect to. Thus, in the latched state, the door 7 does not open even if the hook receiving portion 62a has an inclined surface perpendicular to the bottom surface 6b of the housing 6.

The latch 64 is provided with a hook 64a which can be engaged with and disengaged from the hook receiving portion 62a and a space portion 64b which can accommodate the receiving seat 61.

A notch 65 is formed at the tip of the hook 64a so that the mounting piece 63 of the receiving seat 61 faces in the latched state. Thereby, the mounting piece 63 faces the notch 65 of the hook 64 a, and the latch 64 is locked to the receiving seat 61.

Further, on the back side of the hook 64a, an inclined surface having a slightly gentle gradient than that of the hook receiving portion 62a is formed. As a result, the latch 6 with respect to the seat 61
4, the hook receiving portion 62a and the hook 64
As shown in FIG. 11, a gap G slightly wider than the bottom surface 6 b of the housing 6 is formed between the gap G and the space G.

A stopper surface 66 corresponding to the stopper surface 12a is formed at the upper end of the latch 64 on the pivotal side.
A stopper surface 67 corresponding to the stopper surface 13a and having a gentler gradient than that of the stopper surface 13a is formed at the lower end of the pivot side. As a result, the rotation of the latch 64 is restricted within the range of rotation between the stopper surfaces 66 and 67, thereby preventing the latch 64 from being damaged due to the collision of the latch 64 with the bottom surface 6b of the housing 6 and preventing the latch 64 from being opened. The operability of the latch 64 is improved.

At the center of the latch 64 in the width direction on the pivot side, there is provided a spring receiving recess 68 having a spring receiving surface 68a and opening to the latch bottom surface. Further, the latch 64 is provided with a shaft insertion hole 69 which is opened in the concave portion 68 and through which the shaft 4 is inserted in the latch width direction.

In the fourth embodiment, the operation of engaging and disengaging the door 7 with respect to the housing 6 is performed in the same manner as in the first to third embodiments. I do.

(Fifth Embodiment) A door locking mechanism (not shown) according to a fifth embodiment includes a conventional seat 101 (shown in FIGS. 12 and 13) as a seat, and a fourth embodiment. And a latch 64 in the form (shown in FIG. 11).

That is, the seat according to the fifth embodiment includes a hook receiving portion 101a capable of engaging and disengaging the hook 64a and a seat mounting portion 101 connected to the hook receiving portion 101a.
It is constituted by a substantially J-shaped receiving seat 101 having a cross section b. Thereby, the seat mounting portion 10 of the seat 101
1b faces the notch 65 of the hook 64a, and the latch 6
4 is locked to the seat 101.

In the fifth embodiment, the operation of engaging and disengaging the door 7 with respect to the housing 6 is performed in the same manner as in the first to fourth embodiments. I do.

Further, the shape of the guide surface of the seat in the present invention is not limited to the shape of the guide surface of the seat in the above-described first to fifth embodiments, but the shape in which the hook is smoothly displaced along the guide surface. If so, another curved surface or inclined surface may be used.

Further, it is needless to say that the shape and size of the latch in the present invention can be appropriately changed according to the shape and size of the seat.

[0075]

As described above, according to the present invention, a housing having a front opening, a door having an extension projecting below the bottom of the housing and capable of opening and closing the front opening are provided. A locking member disposed between the housing and the housing, the locking member being provided on a bottom surface of the housing, having a hook receiving portion, and a door extending portion. A latch rotatably supported on the back side and capable of engaging and disengaging from the hook receiving portion, and a latch having a space for accommodating the receiving seat, wherein the latch receives the hook by a spring when the door is closed. Since the latch is urged in the direction to be locked to the housing, when the door is locked to the housing, the latch is rotated in the hook locking direction so that the receiving seat faces the space of the latch and the hook is in the hook receiving portion. Locked. On the other hand, when the door is detached from the housing, the latch is rotated in the hook anti-locking direction so that the receiving seat is exposed to the outside of the latch, and the hook and the hook receiving portion are released from the locked state.

Therefore, since the hook of the latch can be used as the operating portion, the vertical dimension of the latch can be reduced, and the size of the door can be reduced.

Further, since the latch is formed by the latch having a space portion capable of accommodating the receiving seat, the area where the hook can be locked to the hook receiving portion can be widened, and the holding ability of the latch can be sufficiently increased. Can be guaranteed.

According to the fifth aspect of the present invention, the receiving seat is adjustably mounted on the housing, and the adjusting mounting portion of the receiving seat faces the opening surface of the latch when the door is closed. Since the opening window is provided, the mounting of the receiving seat to the housing can be performed while adjusting the opening window in the closed state of the door, and the workability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a latched state of a latch with respect to a seat of a lock mechanism of a door according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a latch is detached from a receiving seat of a door lock mechanism according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the latch of the door lock mechanism according to the first embodiment of the present invention is restricted in rotation by a stopper.

FIG. 4 is an exploded perspective view showing a door locking mechanism according to the first embodiment of the present invention.

FIG. 5 is a sectional view showing a latched state of a latch with respect to a seat of a lock mechanism of a door according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a latched state of a latch with respect to a seat of a door lock mechanism according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a door locking mechanism according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a case where a receiving seat is adjusted in a latched state with respect to the receiving seat of a door lock mechanism according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a case where a receiving seat is attached and adjusted in a latched state of a receiving seat of a door lock mechanism according to a third embodiment of the present invention.

FIG. 10 is a perspective view showing a state where a latch is detached from a seat of a lock mechanism of a door according to a third embodiment of the present invention.

FIG. 11 is a sectional view showing a latched state of a latch with respect to a seat of a lock mechanism of a door according to a fourth embodiment of the present invention.

FIG. 12 is a perspective view showing a latched state of a latch with respect to a seat of a conventional door lock mechanism.

FIG. 13 is a cross-sectional view showing a latching state of a latch with respect to a seat of a conventional door lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock mechanism 3 Locking device 5 Spring 6 Housing 6a Front opening 6b Bottom 7 Door 15 Receiving seat 15a Hook receiving part 16 Latch 16a Hook 16b Space

Claims (7)

[Claims] 1. A housing having a front opening and a door having an extending portion protruding below a bottom surface of the housing and capable of opening and closing the front opening, wherein the housing is provided. A locking device for engaging and disengaging the door with respect to the housing, the locking device being disposed on a bottom surface of the housing and having a hook receiving portion; A hook that is freely pivotally supported, is capable of engaging and disengaging with the hook receiving portion, and a latch having a space portion that can store the receiving seat, wherein the latch holds the hook in a closed state of the door by a spring. A door lock mechanism, which is biased in a direction to lock the hook receiving portion. 2. The door lock mechanism according to claim 1, wherein said hook is constituted by a hook also serving as an operation unit. 3. The seat according to claim 1, wherein a guide surface which is connected to the hook receiving portion and is capable of guiding the latch by opening and closing the door is formed.
A door lock mechanism according to claim 2. 4. The door locking mechanism according to claim 1, wherein the seat is provided on a bottom surface of the housing via an illumination light shielding plate. 5. The latch is provided by adjustingably mounting the seat to the housing, and the latch is provided with an opening window such that the adjustment mounting portion of the seat faces the opening surface when the door is closed. 4. The door lock mechanism according to claim 1, wherein the door is locked. 6. The door locking mechanism according to claim 5, wherein said adjusting mounting portion is formed by a slot for inserting a mounting screw extending in a depth direction of said housing. 7. A receiving seat mounting portion extending to the opposite side of the door from the receiving seat, the receiving seat mounting portion having a notch facing the latch and the receiving seat when the hook is engaged with the hook. 4. The door locking mechanism according to claim 1, wherein the locking mechanism is formed.