JP2001262908A - Pull latch for lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pull latch for a lock which prevents a door from being opened after it rebounds when it is closed strongly and prevents the same from being opened naturally with its own weight. SOLUTION: This pull latch for a lock comprises a lock 4, lever 5 and a latch 7. The lock 4 comprises a locking piece 4b to lock or unlock a door 2 in an interlocking manner with a lock 4a incorporated in a case cover 6. The lever 5 jounalled to the inner side of a recessed pull member 6a provided in the case cover 6. The latch 7 is pressed at its one end by a push spring and held slidably so that it may come in and out of a guide hole formed at the rear surface of the case cover in an interlocked manner with turning operation of the lever 5. By implementing the turning operation to pull up the lever 5 positioned at the inner side of the pull member 6a and journalled to the case cover 6, a locking end engaging with a space of the latch 7 presses one end of the space of the latch 7 to thereby push a tip of the latch 7 into the guide hole. Accordingly, the latch tip is released from a latch receiver 1b of a body of a furniture and then a door is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door for furniture or the like, which is internally provided in a case cover of a lock puller latch having a lock which is cut out of a part of the door and inserted and fixed in the cutout. And a lock having a sickle that locks / removes to / from a cutout portion of the furniture body by rotating in conjunction with the lock, and the operation of the lock inside the case cover Irrespective of this, a lever pivotally supported inside the handle provided in the concave shape on the case cover, and a turning operation to raise the front side of the lever, interlocking with this turning operation, the back of the case cover And a latch slidably disposed so as to move in and out of the guide hole.

[0002]

2. Description of the Related Art In doors used for furniture, particularly steel furniture, a puller provided with a lock which cuts a part of the door and inserts and fixes the door in the cutout is often used. The puller was provided with a latch for locking and holding the door to the furniture body when the door was closed separately from applying and unlocking the lock.

[0003] Specifically, the lock is inserted into the lock from the surface of the door and turned, whereby the lock built into the case cover is turned.・ When the lock of the sickle to be unlocked is locked, the door is locked so that it cannot be opened by being caught by the notch cut in the furniture body. By moving the furniture, the hook portion of the sickle is detached from the cutout portion of the furniture main body, returns to the original position of the case cover, and the door can be opened.

On the other hand, the latch is slidably held in a guide hole on the back of the case cover, and the tip end of the latch is pressed by one end face of the latch and a pressing spring disposed on the inner wall of the guide hole so as to always protrude from the case cover. The door is inserted into the latch receiving portion of the cutout provided in the furniture body to lock and hold the door.

Conventionally, the shape of the above-mentioned latch is such that the tip portion is close to a symmetrical shape in the opening and closing direction of a pointed or triangular pyramid-shaped door or a wheel-shaped door. When the door is pressed and closed and when the door is opened, it can be easily locked and released from the latch receiving portion.

[0006]

However, in the above-mentioned conventional lock latch, the tip of the latch has a pointed triangular pyramid shape or a shape that is nearly symmetrical in the opening and closing direction of the wheel-shaped door. While it was possible to easily lock and release the latch receiving part of the main body, when the door was closed vigorously, it hit the vertical frame of the furniture main body, the door was not locked and held, and it rebounded and opened. However, there is a problem that the door is easily opened by the weight of the door itself depending on the installation state of the furniture.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the above-mentioned conventional lock latch, and when the door is vigorously closed, the door is not locked and held, but rebounds and remains open. Another object of the present invention is to provide a lock puller latch in which the door does not open by its own weight depending on the installation state of furniture.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a lock puller latch according to the present invention is provided with a lock incorporated in a case cover, and is provided by rotating in conjunction with the lock. A lock made of an L-shaped sickle to be locked, and a lever pivotally supported inside a pulling portion provided in a concave shape on the case cover irrespective of application / unlocking of the lock; A lock comprising a guide hole provided on the back surface of the case cover so as to move in and out of the case cover in conjunction with the turning operation of the lever, and a latch pressed at one end by a pressing spring and slidably held. In the above, the lever cover is flush with the surface of the case cover so as not to protrude from the surface of the handle provided in the case cover in a concave shape, and is located at the opposite pole of the lever cover and slides in the guide hole. Freely held latch A locking end that locks and fits into the space portion is provided integrally, and the locking end portion presses one end of the space portion of the latch that locks and fits by rotating and operating to pull up the lever front side, Push the tip of the latch into the guide hole against the pressing force of the pressing spring to make the door openable,
When the rotation of the lever is released, the tip of the latch is pressed by the pressing spring from inside the guide hole and protrudes and locked at the original position. At this time, the lever itself is also rotated by the torsion spring arranged separately from the latch. It is configured to automatically return to the position before the operation, and the door can be opened and unlocked independently of the lock.

According to the above-described embodiment, an L-shaped sword metal that opens and unlocks the door by interlocking with the turning operation of the lock built into the case cover, and the shaft inside the pull portion of the case cover. The latches held so as to slide freely in and out of the guide holes of the case cover in conjunction with the turning operation of the locking end unit formed integrally with the supported lever front side are independent of each other. It locks and holds the door.

In other words, the lock is in a locked state in which the L-shaped sword metal is rotated in conjunction with the lock by turning the key at the time of locking, and is hooked on the notch cut out in the furniture body. Is completely closed and cannot be opened.

[0011] When unlocking, turning the key in the opposite direction to when locking unlocks the L-shaped sickle from the notch in the furniture, returns to the original position of the case cover, and opens the door. It is in a state of being.

Since the opening and closing operation of the door is performed when the lock is unlocked, if no latch or the like other than the lock is provided, the door may be slightly tilted due to the inclination of the furniture. Furniture is installed in passageways, etc. because the door is not securely locked and held, such as when the door is opened, the door opens naturally even due to the environment such as the installation location (for example, a sloping floor) or the vibration of the building. In such a case, the door may unexpectedly open to collide with a pedestrian or the like, and in an emergency, an inconvenience such as blocking a passage may occur.

Therefore, a mechanism for locking and holding the door is required in addition to the locking and unlocking of the lock, and a latch and the like are provided as an auxiliary locking and unlocking device.

[0014] The latch is usually built in a case cover which is cut out at one end of a door of the furniture and inserted and held in the cut-out portion, and is formed in a concave shape on the case cover separately from the lock. A corner or cylindrical guide hole is provided at the lower portion or near the rear surface of the latch. The guide hole is slidably held so as to protrude and retract from the guide hole, and one end of the latch and the guide are provided such that the tip end of the latch always projects from the guide hole. A compression spring is arranged between the inner walls of the hole.

The conventional latch tip has a pointed triangular pyramid shape or a wheel-shaped round shape that is nearly symmetrical in the opening and closing direction of the door. The door is latched and held in a state of being fitted and latched in a latch receiving portion provided on the main body side.

Accordingly, as described above, the latch tip holds and locks the door in a state of being always fitted and latched in the latch receiving portion. Since the pressing force of the pressing spring disposed between the inner walls of the holes merely presses and locks the case cover to the outside, that is, toward the latch receiving portion, the load is greater than the pressing force of the pressing spring. Hangs in the door opening direction,
For example, if the handle provided in the concave shape on the case cover is pulled in the door opening direction, the tip of the latch comes into contact with the corner on the latch receiving side and is pushed back into the case cover from the latch receiving portion, and the door is locked. From the state to the unlocked state, the door is easily opened.

As a result, the door may open due to its own weight due to the inclination of the furniture body itself, or the door may open unexpectedly due to the environment (such as the inclination of the floor) of the installation location or the vibration of the building. In the embodiment, the shape of the latch tip is set to be asymmetric in the opening and closing direction.

That is, in a state where the latch tip is fitted and locked in the latch receiving portion of the furniture main body, even if the pulling portion provided in the case cover is not pulled, sudden external factors may cause a sudden change. To prevent the door from opening carelessly even if a load is applied to the door, the shape of the latch tip should be flat on the surface facing the door opening direction and flush with the end surface of the latch receiving part. This makes it impossible to open the door suddenly.

On the other hand, on the surface facing the door closing direction, the shape of the tip end of the latch is an inclined surface, and when the door is closed, when the latch comes into contact with the corner of the furniture main body, the latch is pressed by the pressing spring through the latch slope. The latch tip slides on the end face of the furniture main body, reaches the end face on the receiving side of the latch receiving section, and is easily fitted and locked in the latch receiving section.

Therefore, since the latch is formed as described above, when the door is to be pulled in the opening direction at the time of opening the door, the door cannot be opened only by pulling the recess provided on the case cover.

Further, the latch of the present embodiment is rotated at a position such that the lever inside the above-mentioned pulling portion and pivotally supported by the case cover is lifted, so that the latch is located at the opposite pole on the front side of the lever and is located on the back of the case cover. The latching end, which locks and fits into the space of the latch built in the guide hole, presses one end of the latch space and pushes it into the guide hole, thereby releasing the tip of the latch from the latch receiving portion. I tried to open the door.

As a result, when the door is pulled in the door opening direction, the operation of pulling the door as in the related art and the operation of rotating the lever so as to pull up the lever supported in the pulling portion can be performed simultaneously. The operation at the time of opening the door only needs to be performed once and the opening of the door is not complicated.

When the door is closed, when the tip of the latch abuts on the corner of the furniture body, the slope of the tip of the latch slides along the corner, whereby the latch is disposed between one end of the latch and the inner wall of the guide hole. The pressed spring is compressed, the tip of the latch is automatically pushed back into the guide hole on the back of the case cover, and when the top of the latch reaches the space of the latch receiving part, it is pushed into the latch receiving part by the pressing force of the pressing spring. The door is pushed out and fitted and locked, and the door is locked and held.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The lock puller latch 3 of the present embodiment is
As shown in FIG. 1, for example, one end of a door 2 of furniture 1 is cut out to form an opening 2a, and a lock puller latch 3 that is inserted and locked into the opening 2a and attached thereto, and a main body side of the furniture. Notch 1a and latch receiving portion 1 provided in
b (see FIG. 5).

As shown in FIG. 2, the lock puller latch 3 is pressed and inserted into an opening 2a formed by cutting out one end of the door side 2 of the furniture 1, for example, through a fixing claw 6f and locked. A lock composed of a case cover 6, a lock 4a built in the case cover 6, and an L-shaped sickle 4b that opens and unlocks the door 2 by rotating in conjunction with the lock 4a. 4, a lever 5 pivotally supported by a shaft 10 inside a handle 6 a provided in a concave shape on the case cover 6, and slides in a guide hole 6 c in conjunction with the turning operation of the lever 5. The latch 7 is movably arranged (not shown in FIG. 2).

For example, FIGS. 3A and 3B show the operating state of only the L-shaped sickle metal 4b, while FIG. The lock 4a and the sword 4b are in the unlocked state after being released from the notch 1a.
3B (not shown) through the rotary plate 4g in conjunction with the 360 ° rotation of the sickle 4b of FIG.
The locked state is reached.

That is, the sickle gold 4b is provided with a hook 4c which is locked by a notch 1a provided in the furniture main body 1, and a lock 4c.
a, which is connected to one end of the key a side opposite to the keyhole side and is interlocked with the lock 4a via two connecting portions 4f for fixing the rotating plate 4g. When one end 4h of the plate separates from the stopper 4d and rotates 270 degrees, the other end 4i of the rotating plate comes into contact with the stopper 4d.

At this time, the other end 4i of the rotary plate 4g presses the stopper 4d, and the sword 4b starts rotating in the direction in which the key 13 rotates, and finally rotates the key 13 by 360 degrees. As a result, the locked state shown in FIG. 5 locked in the notch 1a is reached.

At this time, since the leaf spring 41 presses and locks one end of the leaf spring 41 and the other spring receiving portion 4j of the sword 4b with an appropriate force via the fulcrum 4m at the other end, the rotating plate When 4g rotates and the other end 4i of the rotating plate begins to press and rotate the stopper 4d, the sickle 4b rotates against the force of the leaf spring 41 pressing the spring receiving portion 4j.
Is arranged so as to be in contact with the circumference of the sickle metal 4b, so that when it reaches the other spring receiving portion 4k, the sickle metal 4b is pressed and locked in a locked state.

On the other hand, as shown in FIGS. 8A and 8B, the shape of the latch is located at the lower portion or near the rear surface of the case cover 6 and the tip ends of the latches 11 and 12 face the opening and closing direction of the door 2. The triangular pyramid has a pointed shape having a smooth shape close to a symmetrical shape, or a wheel-like shape that is easily immersed in the latch receiving portion 1b of the furniture main body 1.
At the other end, rod-shaped latch guides 11b and 12b are provided, and the tips of the latch guides 11b and 12b are inserted through through holes formed in the inner wall of the case cover 6 and locked.

Further, the latch guides 11b and 12b
A push spring 8 is inserted into the latch 11 and the latch 11 is moved between one end of the latch 11 or 12 and an inner wall having a through hole of the guide hole 6c.
12 is always pressed in the direction of the latch receiving portion 1b of the furniture body 1 to lock and hold the door 2.

The configuration of the lock latch as described above is a general lock latch configuration, and has been conventionally known.

Therefore, the lock 3 for the lock of the lock of the present embodiment is provided separately from the locking and unlocking of the lock 4 having the sickle 4b. A lever 5 pivotally supported by a shaft 10 on the inside and a guide hole 6c provided on the back of the case cover 6 are slidably moved in and out of the guide hole 6c in conjunction with the turning operation of the lever 5, so that the door 2 is mounted. And a latch 7 for unlocking.

That is, as shown in FIG. 4A, the lever 5 is pivotally supported by the shaft 10 inside the pull portion 6b so as not to protrude from the surface 6a of the case cover.
Leads to a shaft cylinder 5e that encloses the shaft 10 via a lever table 5a whose tip is flush with the surface 6a of the case cover and a finger-holding surface 5c that is continuous with the lever table 5a in an L-shape. The case cover 6 bifurcates toward the rear direction, one of which forms a locking end 5b which locks and fits into the space 7c of the latch 7, and the other end of which contacts the bottom 6d of the puller to engage the lever 5 with the lever 5.
5d is formed to keep the position at a constant.

Further, the lever 5 is arranged so that the end 5d is constantly pressed and fixed to the pull bottom 6d by a torsion spring 9 inserted and locked in a shaft cylinder 5e containing the shaft 10. One end is pressed against the locking end 6e of the case cover 6 and the other end is pressed against a spring locking portion 5f provided near the fork of the lever 5, so that the lever 5 comes into contact with the pulling portion 6b of the case cover 6. It is rotatably fixed.

The latch 7, which is inserted and held in a guide hole 6c provided on the back of the case cover 6 so as to be freely retractable,
When the latch tip 7a faces the opening direction of the door 2, the door 2
Door 2 to prevent itself from opening due to vibration or tilt
Is formed, and in the closing direction of the door 2, an inclined surface 7d is formed so as to smoothly slide into the latch receiver 1b of the furniture body 1.

Further, a latch guide 7b is provided at the other end of the latch 7, and the tip side of the latch guide 7b is locked through a through hole provided in the case cover 6.

A pressing spring 8 is inserted into the latch guide 7b, and is always disposed between one end of the latch 7 and an inner wall having a through hole of the guide hole 6c.
Is pressed in a direction protruding from the guide hole 6c.

On the other hand, the latching end 5b of the lever 5 is arranged so as to be inserted into the space 7c of the latch 7 so that the latch 7 is pushed by the pressing spring 8 and does not fall out of the guide hole 6c. At this time, one end of the space 7c of the latch 7 is pressed in the direction in which the locking end 5b projects from the guide hole 6c by the pressing spring 8 at this time. The locking end 5b and the other end 5d, which is bifurcated, contact the bottom 6d of the puller of the case cover 6 to receive the pressing force of the pressing spring 8, and the lever 5 as a whole covers the case cover. 6
Are arranged so that the case cover surface 6a and the lever table 5a are flush with each other.

Therefore, when the door 2 is opened, a finger is hooked on the finger-holding surface 5c of the lever 5 and the lever 5a is pivoted so as to lift up the lever table 5a. One end of the space 7c is pressed, and the latch tip 7a is pushed into the guide hole 6c, so that the door 2
In the unlocked state shown in FIG. 4 (B).

As shown in FIG. 7B, when the door 2 is to be closed, simply pressing the door 2 causes the inclined surface 7d of the latch 7 to hit the corner of the furniture main body 1 at the corner. The latch tip 7a is pushed into the guide hole 6c through the slope 7d against the pressing force of the push spring 8 regardless of the turning operation of the lever 5, and the pushed latch tip 7a slides on the end face of the furniture main body 1, and when it reaches the latch receiving portion 1b, it is pushed out again from the guide hole 6c by the pressing force of the pressing spring 8 and locked on the latch receiving portion 1b, and the locking shown in FIG. It is in a state.

Conventionally, the latch 7 is slidably held in a guide hole 6c provided on the back of the case cover 6, and the tip 7a of the latch 7 is pressed by a pressing spring 8 so as to always protrude from the case cover 6. The latch 7 is inserted and fitted into the notch portion 1a and the latch receiving portion 1b provided in the furniture main body 1 to lock and hold the door 2. The shape of the latch 7 is the same as that of the conventional tip 7a. It has a shape of a side triangular pyramid 11 or a shape of a wheel 12 and is nearly symmetrical in the opening and closing direction of the door 2, and is easily latched to and released from the latch receiving portion 1 b when the door 2 is opened and closed. It is,
In many cases, such as when the door 2 is closed vigorously, the door 2 hits the vertical frame of the furniture main body 1 and rebounds and opens, and when the furniture main body 1 is installed on an inclined surface, the door 2 itself is used. The door 2 is opened by the conventional latch 11 such that the door 2 opens naturally in such a manner that the pressing spring 8 resists the pressing force with the weight of
-It was difficult to lock with a shape like 12.

In other words, in the latches 11 and 12 having the above-described configuration, when the door 2 is lightly pressed against the furniture main body 1, the slope 11a of the latch 11 and the outer peripheral surface 12a of the wheel 12 become the end face of the furniture main body 1 or the latch receiving portion 1b. It slides on the end face, is immersed in the guide hole 6c, easily fits into the latch receiving portion 1b, and reaches the closed state. As in the case of the closed state, when the door 2 is loaded in the opening direction, it becomes easy. Also, it was shaped to be detached from the latch receiving portion 1b.

Therefore, the form of the latch 7 of this embodiment is as follows.
In order to lock the door 2 so that the door 2 does not close due to the vertical frame of the furniture body 1 rebounding and not opening,
A locking surface 7e is provided in the direction from the tip 7a of the latch 7 to the latch guide 7b so that the door 2 is not opened unless the lever 5 is rotated.

That is, a finger is hooked on the finger-holding surface 5c of the lever 5, and the lever 5 is turned so as to lift up the lever table 5a. Is pushed and the latch tip 7a is pushed into the guide hole 6c so that the door 2 can be opened. Unless the lever 5 is rotated, the latch 7 does not slide and the locking surface 7e does not slide. Does not come off from the latch receiver 1b of the furniture body 1.

On the other hand, when the door 2 is opened and the door is to be closed again, like the conventional latches 11 and 12,
The latch 7 is pressed into the guide hole 6c when the latch inclined surface 7d is pressed against the corner portion of the furniture body 1, and the latch tip 7a slides on the end face of the furniture body to reach the latch receiver 1b, and the pressing spring 8 Latch receiver 1 by pressing force of
The locking surface 7e is locked to the end surface of the door b in the door opening direction, and the door 2 is securely locked and held by the furniture main body 1, so that the locked state shown in FIG.

At this time, as shown in FIG. 6, the latch 7 pushes the space from one end to the other end of the latch space 7c regardless of the turning operation of the lever 5 and compresses the spring 8 to guide the guide hole 6c. It moves inside the guide hole toward the inner wall.

As a result, irrespective of whether the lock 4 is applied or unlocked, the pivoting operation of the lever 5 and the sliding operation of the latch 7 cause the vertical frame of the furniture body 1 to hit the door 2 when the door 2 is closed vigorously. The door 2 can be prevented from opening and opening due to the weight of the door 2 without being locked and retained, and can be prevented from arbitrarily opening due to the weight of the door 2 and colliding with a pedestrian or hindering walking in a passage.

[0050]

As described above, the lock and the like according to the first, second and third aspects of the present invention are inserted and fixed to the door of furniture or the like via the fixing claws of the case cover as described above. And a lock consisting of a sickle that is applied and unlocked by rotating in conjunction with the lock, and a shaft inside a handle provided in a concave shape on the case cover. A lever that is supported and a latch that is slidably disposed in a guide hole provided on the back of the case cover so as to move out of and out of the case cover in conjunction with the turning operation of the lever. The latching end formed integrally with the lever table by pivoting to raise the latch presses one end of the space portion of the latch that latches and engages with the latching end, and pushes the latch tip into the guide hole. , Open the door.

Therefore, the door is locked and held by the furniture body and opened without permission even if the door is not opened and closed with the key every time the door is opened and closed because of the latch mechanism provided with the lock. Can be prevented.

Further, when the door is opened, a lever which is pivotally supported inside the pull portion of the case cover is pivotally operated so as to be pulled up from inside the pull handle, and an operation of pulling the door to open it. However, since they can be performed in unison, the door opening operation is not complicated, and the door is always locked and held. Therefore, even if the furniture main body is installed in a passage or the like where people pass well, it is safe without suddenly opening the door. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a furniture main body showing an embodiment using a lock puller latch according to the present invention.

FIG. 2 is a perspective view showing a configuration of the lock puller latch.

FIG. 3 is a partially enlarged view showing an operation state of a sickle of the lock puller latch, (A) is a front view showing an unlocked state,
(B) is a front view showing a locked state.

4A and 4B are cross-sectional views illustrating a configuration of a lever and a latch of the lock puller latch, wherein FIG. 4A is a side cross-sectional view illustrating a normal state of the latch, and FIG. It is a side sectional view.

FIG. 5 is a front view showing a cutout portion and a latch receiving portion of the steel furniture main body, showing a locked state of the sickle and the latch of the lock puller latch.

FIG. 6 is a side cross-sectional view showing a configuration of a lever and a latch of the lock puller latch, in which the lever does not operate and only the latch is inserted into the guide hole.

7A and 7B show a configuration of a lever and a latch of the lock puller latch, wherein FIG. 7A is a side sectional view showing a locked state, and FIG. .

FIG. 8 is an explanatory side sectional view showing a shape of a conventional lock puller latch, (A) is a side sectional view of a latch of a side triangular pyramid lock, and (B) is a side sectional view of a wheel-shaped latch. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furniture main body 1b Latch receiving part 2 Door 3 Lock puller latch 4 Lock 4b Sword 5 Lever 5b Locking end 6 Case cover 6b Puller 6c Guide hole 7 Latch 7a Latch tip 7d Latch slope 8 Press spring

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A47B 95/02 505 A47B 95/02 505B E05B 1/00 311 E05B 1/00 311H

Claims (3)

[Claims] 1. A lock built into a case cover inserted and fixed to a door side of furniture or the like, and an L-shaped sickle metal that locks and unlocks the door by rotating in conjunction with the lock. Lock, and a lever that is pivotally supported inside a handle provided in a concave shape on the case cover, and provided on the back of the case cover to move out and out of the case cover in conjunction with the turning operation of this lever. A lock provided with a latch having one end pressed by a pressing spring and slidably disposed in the guide hole provided, so that the lock is provided in a concave shape so as not to protrude from the surface of the case cover. The lever pivotally supported inside the part has a lever front side that is flush with the surface of the case cover, and a latch slidably disposed in the guide hole so as to move to and from the case cover at the opposite pole of this lever front side. Locking fitting in the space of The latching end is provided integrally, and by rotating the lever to pull up the front side, the latching end presses one end of the latch space, pushes the latch tip into the guide hole, and unlocks the door. When the rotating operation of the lever is released, the tip of the latch is pressed by the pressing spring from the inside of the guide hole and is projected and locked at the original position, and the lever itself is arranged separately from the pressing spring that presses the latch. The lock puller latch, wherein the torsion spring automatically returns to a position before the rotation operation. 2. The lock puller latch according to claim 1, wherein the latch is provided so that the door is not unlocked unless the lever is turned to lift the front side of the lever. 3. The latch according to claim 1, wherein only the latch is immersed in a guide hole provided on the back surface of the case cover by pressing the tip of the latch, regardless of the turning operation of the lever. A lock puller latch as described.