JP3102452U - Drawer lock device - Google Patents

Abstract

[PROBLEMS] To enable only one drawer to be opened at a time, and to allow a drawer exhibiting an open state after locking a cabinet to be directly pushed in and locked in a situation where unlocking is unnecessary, and to insert an external article into a latch structure. Sometimes the drawer can be forcibly opened.
A design in which a drive rod directly drives a clutch piece and then indirectly drives and moves a latch piece by a first elastic means, so that a user locks a latch head and causes the drive rod to latch the entire latch. When the structure is driven to return to the locked state, if there is an unlocked drawer, it can be directly pushed back, and the latch piece and the clutch piece are connected by the first elastic means. The slope pushes the latch piece to move downward, and after the latch portion is completely inserted into the engagement hole, the latch piece returns to the original locked state, which effectively reduces the well-known structure. It solves the disadvantage that a collision occurs in a similar situation and the entire structure is damaged.
[Selection diagram] FIG.

Description

  The present invention relates to a kind of continuous latch device of a drawer, in particular, it enables only one drawer to be opened at a time, and directly locks a drawer which is open after locking a cabinet in a situation where unlocking is unnecessary. And a drawer lock device capable of forcibly opening the drawer when an external article is inserted into the latch structure.

  Generally, a lock structure is provided in a tool box and a cabinet to achieve the purpose of locking. FIG. 1 is a perspective view of a known drawer lock device. The drawer lock device includes a lock head A, a drive rod B, a latch piece C, and a plurality of engagement blocks D. Among them, the engagement block D is fixed to the rear end of the drawer (not shown), the lock head A is fixed to the front end of the cabinet E, and the latch piece C is provided at the rear end of the cabinet E. An engagement hole F is provided at a position corresponding to an engagement block D provided at the rear end of each drawer, and both front and rear ends of a latch connecting rod B are connected to a lock head A and a latch piece C. The user can drive the latch piece C up and down by driving the latch piece C via the drive rod B with the lock head A, and by changing the relative positions of the engagement hole F and the engagement block D on the latch piece C, To achieve the function of synchronous lock, unlock, drawer.

  To increase activity and convenience, most cabinets are equipped with casters, and the cabinet drawers can be opened significantly wide to allow the user to access and remove items inside, allowing the user to remove items. It is common to open one or more drawers simultaneously for searching or other purposes. If the cabinet contains a fairly heavy tool, once the excessive drawers are released, the overall center of gravity of the cabinet will be altered, the center of gravity of the cabinet will become unstable, and it will tilt forward, causing users and surrounding people to fall. May hurt. Also, in the case of a well-known cabinet, in the process of locking by the user, if the drawer is not closed to the normal position, it is not possible to push in the unclosed drawer after locking the lock head, and if the user directly closes the drawer, The engagement block D collides with the latch piece C, causing a situation in which the latch piece C is damaged.

  In view of the above-mentioned causes, the inventor of the present invention has filed Patent Document 1. As shown in FIG. 2, the lock head G includes a lock rod G, a drive rod I, an engagement means, an engagement piece K, and a latch piece. One end of a driving rod I is connected to the inside of the housing H, another end of the driving rod I penetrates an engaging means fixed to a rear end of the upper side of the inside of the cabinet, and the latch piece has a long plate shape and a plurality of through holes. L, using the engaging means, the latch piece rotates in the forward and reverse directions to form an unlock or lock, and after the drawer is pulled out, the engaging piece K is pushed back to the locked position. It has a function to limit the number of drawers that can be opened at one time.

  While the above-described structure achieves the function of limiting the number of single drawer opens, the height of the drawer side plate is generally low, so that the articles placed in the drawer can protrude and exceed the drawer rear end side plate. In addition, it may fall into the space between the rear end of the drawer and the rear panel of the cabinet, and a projection or a fallen object may hit the latch rotating piece, making it impossible to rotate the latch rotating piece smoothly and failing to lock smoothly. At this time, the user can remove the obstacle by himself, but once the user locks it, it can not be unlocked smoothly, the repairman must unlock using a special tool, It caused inconvenience and difficulties for users and repair staff.

Taken together, the known structure has the following improvements in the course of actual operation and use.
1. The size and shape of an article left in a cabinet may not be predictable.For example, if a packaged electric wire, large cloth, or small screws are left in the cabinet, the abandoned object may be left behind the cabinet. It protrudes or falls near the latch turning piece, and the latch turning piece cannot be smoothly locked or unlocked.
2. A safety lock structure that allows only one drawer to be open at a time and prevents tilting is normally used when the user locks the lock head and finds that some cabinet drawers are not completely closed. Often, the user pushes the unclosed drawer by hand, and the user does not notice that the lock head of the cabinet is locked, and strongly pushes the latch piece and the engagement block to damage the entire structure. May bring.

Japanese Utility Model Application No. 9-9982

  The main object of the present invention is to provide a kind of drawer lock device, which improves the structure of the latch piece and the engaging block combined with the latch piece, and also provides the latch structure with the elastic clutch mechanism. In addition to achieving the function of limiting the number of drawers that can be opened at one time by combining the slopes provided in the engagement blocks, the normal operation of the latch pieces to prevent the articles in the drawers from becoming messy or falling To prevent them from being affected.

  A second object of the present invention is to provide a kind of drawer locking device, which is used when the article of the drawer projects to the rear of the cabinet and affects the normal operation of the latch piece of the latch structure. It is assumed that the user can forcibly pull out the drawer by the positioning mechanism.

  It is another object of the present invention to provide a kind of drawer locking device, which has a drawer lock head already locked, and when there is an unlocked drawer, the drawer can be directly withdrawn without unlocking. Can be pushed in, whereby the drawer can be automatically locked, and no damage is caused by collision.

The invention of claim 1 is mounted in a cabinet with a plurality of drawers and comprises a lock head, a drive rod, a latch base, a plurality of engagement blocks and a latch structure,
The lock head is provided at the front end of the cabinet and is used for locking and unlocking by a user,
The front end of the drive rod is fitted into the groove of the lock core at the rear end of the lock head, and when the lock head is turned by a key, the drive rod rotates,
The latch base is a rectangular elongated hollow body, and is provided on an inner surface of the cabinet, and a first convex column is provided.
The plurality of engagement blocks are fixed to the rear end of each drawer, each of the engagement blocks has a protrusion outside the protrusion, and a latch portion is provided on both outer lower sides of the protrusion to approach the drawer of the latch portion. One end has a substantially vertical contact surface, and the upper cup of the latch portion projects from the bottom surface of the engagement block, and a slope is provided on another side of the latch portion,
The latch structure includes a latch piece, a clutch piece, and a first drive positioning mechanism. The latch piece is fitted in a latch base and can be moved up and down, and at a position corresponding to an engagement block of the latch piece. An engagement hole is provided, the size of the engagement hole is matched to the size of the protrusion of the engagement block, and the protrusion is within an appropriate horizontal movement range and can penetrate the engagement hole; The first drive positioning mechanism is installed inside the clutch piece and driven in combination with a hook provided at one end of the drive rod, and the clutch piece and the latch piece are connected by first elastic means. Drawer lock device.
According to a second aspect of the present invention, in the drawer lock device according to the first aspect, a groove is provided at a position corresponding to the drive rod above the latch piece, and the clutch piece is fitted inside the latch piece, and the clutch piece is provided. A long hole through which the drive rod passes is provided, a circular hole is provided on one side of the clutch piece, and a long groove is provided at a position corresponding to the first convex column of the latch base below the clutch piece. Drawer lock device.
According to a third aspect of the present invention, in the drawer lock device according to the first aspect, the first drive positioning mechanism is composed of a first drive piece and a second elastic means, and the first drive piece is pivotally mounted inside the clutch piece. And a first protruding end, a second protruding end, a third protruding end, and a fourth protruding end are provided around the first driving piece in different directions, and the first protruding end located above is provided with a driving rod. A second elastic means is provided between the first driving piece and the clutch piece to provide a restoring force after the first driving piece rotates, and a third protruding end below the first driving piece. A convex block is provided on one side corresponding to the first convex column, and the convex block contacts the first convex column provided on the latch base when the lock head is locked and the drive rod is turned upward, In addition, a second convex column is provided on one side of the fourth protruding end near the latch piece, and a corresponding position of the latch piece is provided. Combined in the long groove, the upper end of the second protrusive pillars, characterized in that the contact with the inner edge of the long groove, and a pull-out locking device.
According to a fourth aspect of the present invention, in the drawer lock device according to the first aspect, a second drive positioning mechanism is provided, and the second drive positioning mechanism is installed on a back surface of the latch piece, and is attached to the clutch piece by a third elastic means. A drawer lock device, wherein the upper end plane of the second drive positioning mechanism is in contact with the hook at the rear end thereof after the drive rod is turned by an appropriate angle.
According to a fifth aspect of the present invention, in the drawer lock device according to the fourth aspect, the second drive positioning mechanism is composed of the second drive piece and the third elastic means, and the second drive piece has an L shape and is provided on the upper edge. A plane, a pivot and a fourth fixing seat are provided, and the second drive piece is pivotally mounted on the clutch piece circular hole by the pivot and installed on the back surface of the latch piece. And a fourth fixed seat is provided on one side of the second drive piece near the clutch piece, and the fourth fixed seat of the second drive piece passes through the long groove of the latch piece and the groove of the clutch piece, and The drawer lock device is characterized in that the fixed seat and the clutch piece are connected by third elastic means.
According to a sixth aspect of the present invention, in the drawer lock device according to the fifth aspect, a fifth fixed seat is provided at a lower end of the inner surface of the clutch piece, and a fifth fixed seat having two ends of the third elastic means provided on the clutch piece. The drawer lock device is characterized in that it is fixed to the fourth fixed seat of the second drive piece.
According to a seventh aspect of the present invention, there is provided the drawer lock device according to the first aspect, wherein the latch piece is an inverted U-shaped elongated member.
The invention according to claim 8 is the drawer lock device according to claim 1, wherein the latch piece is provided with a first fixing hole, the clutch piece is provided with a second fixing seat, and two ends of the first elastic means are provided on the latch piece. The drawer lock device is characterized by being fixed to the first fixing hole and the second fixing seat of the clutch piece.

  The latch piece of the present invention moves in the latch base in a vertical movement manner, whereby the operation of the latch piece is less likely to be affected by the protrusion or fall of the article in the drawer. The present invention has the advantage that the normal operation of the unlocking and locking can be surely maintained, and solves the disadvantage that the conventional article does not operate normally due to the prevention of the protruding or fallen object.

  The drawer chain device of the present invention is mounted in a cabinet and includes a lock head, a drive rod, a latch base, a plurality of engagement blocks and a latch structure. The lock head is provided at the front end of the cabinet and is used for locking and unlocking by a user. The front end of the drive rod is fitted into the groove of the lock core at the rear end of the lock head, and when the lock head is turned with a key, the drive rod rotates. In addition, the latch base is formed as a rectangular elongated hollow body and provided on the inner surface of the cabinet. An engagement block is fixed to the rear end of each drawer. The latch structure is fitted in the latch base so as to be movable up and down, and one end of the latch structure is connected to one end of a driving rod and driven. The features of the present invention are as follows. A protrusion is provided outside the engagement block fixed to the rear end of the drawer, a latch is provided below the protrusion, and a pair of substantially vertical contact surfaces are provided at one end of the latch near the drawer. The latch portion protrudes from the bottom surface of the engagement block, and the other side of the latch portion has a slope, and the slope is parallel to the front slope of the protrusion and maintains the same distance. In addition, the latch structure further includes a latch piece, a clutch piece, a first drive positioning mechanism, and a second drive positioning mechanism. The latch piece is fitted in the latch base and can move up and down, and an engagement hole is provided at a position corresponding to the engagement block of the latch piece. The size of the engagement hole is matched to the size of the protrusion of the engagement block, and the protrusion is within a suitable horizontal movement range and can penetrate the engagement hole. The first drive positioning mechanism is pivotally installed inside the clutch piece, and the first drive positioning mechanism is combined with one end of the drive rod. When the latch piece becomes inoperable due to the protrusion of the article in the cabinet, a second drive positioning mechanism provided on the back of the latch piece is connected to one end of the drive rod and driven to forcibly drive the latch piece. Slide down to open the drawer.

  The clutch piece is fitted inside the latch piece above the latch piece, the clutch piece and the latch piece are connected by the first elastic means, and the first drive positioning mechanism is composed of the first drive piece and the second elastic means. ing. The first driving piece is pivotally installed inside the clutch piece, and a third protruding end below the driving piece corresponds to a convex mass provided on one side of the first convex column. Is connected to the first driving piece and the clutch piece to provide a restoring force after the rotation of the first driving piece. When the lock head is locked and the drive rod is turned upward, the convex block abuts on a first convex column provided on the latch base and, in addition, closes to the latch piece at the fourth protruding end of the first drive piece. The second convex column is provided on the side, is combined with the long groove provided at the corresponding position of the latch piece, the upper end of the second convex column contacts the upper end of the long groove, and the upper edge of the long groove extends the second convex column downward. When the compression is performed, the first driving piece is driven and rotated by this, and the latch structure is restored to the original unlocked state even if the latch structure slides downward.

  According to the above-described design, when the user unlocks the lock head and turns the drive rod, the hook at the rear end of the drive rod comes into contact with one side of the first protruding end of the first drive piece to drive the first drive piece. The piece rotates, whereby the protrusion provided at the third protruding end of the first drive piece does not abut against the first protrusion any more, and the latch structure slides downward due to its own weight. At this time, the position of the lower end of the engagement hole of the latch piece is lower than the height of the bottom end of the latch portion of the engagement block, and all drawers exhibit an open state. However, when an article in the cabinet projects and is caught by the latch piece and the latch structure cannot slide downward due to its own weight, the hook at the rear end of the drive rod is brought into contact with one side of the fifth projecting end of the second drive piece. , The latch structure can be forcibly slid downward.

  When the user pulls out one of the drawers, the dorsal slope of the protrusion of the engagement block comes into contact with the upper end of the engagement hole, and the engagement hole of the latch piece is pushed upward, so that the entire latch structure faces upward. Move and return to the original locked position. At this time, the first driving piece returns to the original position by the force provided by the second elastic means, and the convex mass of the third protruding end again strikes the first convex column, and the latch structure is returned to the original locked state. To recover. At this time, other undrawn drawers cannot be drawn out again, and the function of opening only a single drawer at a time is achieved.

  In addition, the drive rod directly drives the clutch piece, and then indirectly drives and moves the latch piece by the first elastic means, so that the user locks the latch head and the drive rod has the entire latch structure. When the drive is returned to the locked state, if there is an unlocked drawer, it can be directly pushed back, and the latch piece and the clutch piece are connected by the first elastic means. The slope pushes the latch piece to move downward, and after the latch portion is completely inserted into the engagement hole, the latch piece is restored to the original locked state by the force provided by the first elastic means. However, this effectively solves the disadvantage of known structures causing collisions in similar situations and damaging the overall structure.

  As shown in FIGS. 3, 4, 5, 6, 20, 21, and 22, the drawer lock device of the present invention is mounted in a cabinet 1, in which a plurality of drawers 11 are provided. Is provided. The present invention includes a lock head 2, a drive rod 3, a latch base 4, a plurality of engagement blocks 5, and a latch structure 6. The lock head 2 is provided at the front end of the cabinet 1 and is used for locking and unlocking by the user. The front end of the drive rod 3 is fitted into the groove 21 of the lock core at the rear end of the lock head 2, the rear end of the drive rod 3 is inserted into the fixed frame 68 and provided with an eccentric hook 31, and the lock head 2 is keyed. , The drive rod 3 rotates. In addition, the latch base 4 is formed as a rectangular elongated hollow body and is provided at the rear end of the cabinet 1. The latch base 4 is provided with a first convex column 41. The engagement block 5 is fixed to the rear end of each drawer 11. The latch structure 6 is fitted into the latch base 4 so as to be movable up and down, and one end of the latch structure 6 is connected to and driven by the hook 31 at one end of the drive rod 3.

  The features of the present invention are as follows. At the rear side of the engagement block 5 fixed to the rear end of the drawer 11, there is a protrusion 51 whose center projects upward, the protrusion 51 being composed of a rear slope 511, a front slope 512 and an upper corner 513, and Latch portions 52 are provided on both outer lower sides of the protruding portion 51, and one end near each drawer 11 of each latch portion 52 has a substantially vertical contact surface 521. On the other side of the latch portion 52, there is a slope 522 that projects, and the slope 522 is parallel to the front slope 512 of the protrusion 51. In addition, the latch structure 6 further includes a latch piece 61, a clutch piece 62, a first drive positioning mechanism 66, and a second drive positioning mechanism 67. The latch piece 61 is an inverted U-shaped elongated body, is fitted in the latch base 4 and can move up and down, and has a groove 611 at a position corresponding to the hook 31 of the drive rod 3 above the latch piece 61. A long groove 614 is provided on one side of the latch piece 61, and an engagement hole 612 is provided at a position corresponding to the engagement block 5 of the latch piece 61. The size of the engaging hole 612 is defined as the vertical distance of the contact surface 521 of the projecting portion 51 of the engaging block 5, and the projecting portion 51 is within an appropriate horizontal movement range and can penetrate the engaging hole 612. And keeps contact with any one of the above-described slope 522, rear slope 511, and front slope 512.

  In addition, a first fixing hole 613 is provided in the latch piece 61, the clutch piece 62 is fitted inside the latch piece 61, and the clutch piece 62 has the second fixing seat 621 and the hook 31 at the rear end of the drive rod 3. A long groove 623 is provided at a position corresponding to the first convex column 41 of the latch base 4 below the clutch piece 62, and two ends of the first elastic means 651 are connected to the latch piece. 61 is fixed to the first fixing hole 613 of the clutch piece 62 and the second fixing seat 621 of the clutch piece 62, and the contact block 626 on the back surface of the clutch piece 62 presses the upper end of the groove 611, and the predetermined position of the clutch piece 62 with respect to the latch piece 61. Maintain position. In addition, the first drive positioning mechanism 66 is composed of the first drive piece 63 and the second elastic means 652. The first drive piece 63 is installed inside the clutch piece 62 in a pivotal manner, and is driven in combination with one end of the drive rod 3. Around the first driving piece 63, a first protruding end 631, a second protruding end 632, a third protruding end 633, and a fourth protruding end 634 in different directions are provided. A third fixed seat 2635 is provided on the second protruding end 632 of the second fixed seat 621 at one end of the hook 31 at the rear end of the drive rod 3, and two ends of the second elastic means 652 are connected to the clutch. The second fixed seat 621 of the piece 62 and the third fixed seat 635 of the first drive piece 63 are fixed to one side corresponding to the first convex column 41 of the third protruding end 633 below the first drive piece 63. When the lock head 2 is locked and the hook 31 of the drive rod 3 is turned upward, the convex block 636 comes into contact with the first convex column 41 provided on the latch base 4.

  In addition, the second drive positioning mechanism 67 (FIG. 21) of the present invention is provided on the back surface of the latch piece 61 in a pivotal manner, and is composed of the second drive piece 64 and the third elastic means 653. The driving piece 64 has an L shape and has a flat surface 641 at its upper end, a fourth fixing seat 643 below it, and a pivot 642 below its side. Among them, the upper surface 641 is located on one side of the axis of the drive rod 3, the fourth fixing seat 643 passes through the long groove 614 of the latch piece 61 and the long groove 623 of the clutch piece 62, and the lower end thereof has the long groove 614. The second drive piece 64 is connected to the circular hole 625 of the clutch piece 62 by a pivot 642, and both ends of the third elastic means 653 are connected to the hook at the outer end of the fourth fixed seat 643 and the fifth end of the clutch piece 62. Locked to fixed seat 624. In addition, a second protrusion 637 is provided on one side of the fourth protruding end 634 of the first driving piece 63 facing the latch piece 61 (FIGS. 3 and 20), and is provided at a position corresponding to the latch piece 61. The long groove 614 is combined, and the upper end of the second convex column 637 contacts the upper inner end of the long groove 614.

  As shown in FIG. 3, the first drive piece 63, the clutch piece 62, the latch piece 61, and the second drive piece 64 are arranged in order from inside to outside, and the hook 31 at the rear end of the drive rod 3 is moved from front to back. The support hole 681 of the fixed frame 68, the groove 611 of the latch piece 61, and the long hole 622 of the clutch piece 62 are sequentially passed. When the lock head 2 is in the locked state, the hook 31 at the rear end of the drive rod 3 is in the upward state, and at this time, the lower end of the engagement hole 612 provided in the latch piece 61 is The drawer 11 abutting on the abutment surface 521 and coupled to the engagement block 5 is locked as a drawer disabled (FIG. 12). In addition, the convex block 636 provided at the third protruding end 633 of the first driving piece 63 comes into contact with the first convex column 41 to achieve the function of supporting and positioning (FIG. 7).

  Please refer to the operation of the latch structure of the present invention shown in FIGS. When the user unlocks the lock head 2 and turns the drive rod 3, the hook 31 at the rear end of the drive rod 3 contacts one side of the first protruding end 631 of the first drive piece 63 to drive it. As a result, the first drive piece 63 rotates, whereby the protrusion 636 provided at the third protruding end 633 of the first drive piece 63 no longer contacts the first protrusion 41 (FIG. 8). When the rod 3 is turned by 180 degrees and the latch structure 6 slides downward, it is positioned in contact with the bottom of the cabinet 1 or a pin (not shown) is provided below the latch base 4 to provide a latch structure. 6 descends and collides with the pin to be positioned. At this time, the position of the lower end of the engaging hole 612 of the latch piece 61 is slightly lower than the height of the bottom end of the latch portion 52 of the engaging block 5, and all the drawers 11 can be opened (FIG. 13). As shown in FIG. 10, when the user pulls out any one of the drawers 11, the rear slope 54 of the engagement block 5 comes into contact with the upper end of the engagement hole 612 and the engagement hole 612 of the latch piece 61 is closed. Press upward to move the entire latch structure 6 upward (FIG. 14) and return it to the locked position. At this time, the first driving piece 63 returns to the original position by the force provided by the second elastic means 652, and the protruding mass 636 of the third protruding end 633 again strikes the first protruding column 41, and the latch structure 6 is moved first. Recover to the locked state. At this time, the drawer 11 that has not been opened cannot be pulled out, and a function of opening only a single drawer 11 at a time is achieved. When the user wants to release the other drawer 11 and take out the article, the latch piece 61 assumes the locked state, so that the user has to push in the drawer 11 which has been opened first, thereby the engagement block 5 The slope 522 of the lower latch portion 52 abuts against the lower end of the engagement hole 612 of the latch piece 61 to push the latch piece 61 downward (FIG. 15), and the upper end of the long groove 614 of the latch piece 61 becomes the first drive piece 63. The second drive column 637 is pressed and moved downward (FIG. 11), whereby the first drive piece 63 rotates, and the protrusion 636 provided at the third protruding end 633 of the first drive piece 63 moves to the second position. When the latch structure 6 slides downward by its own weight, the latch structure 6 recovers to the unlocked state, and the user can pull out the drawer 11 to be opened. By one The ability to limit the drawer quantities draw in is achieved.

  When the user locks the lock head 2 of the present invention and drives the clutch piece 62 to the hook 31 of the drive rod 3 to move the entire latch structure 6 upward to be in the locked state, the unlocked drawer 11 is opened. If it is directly pushed back, since the latch piece 61 and the clutch piece 62 are connected by the first elastic means 651, the slope 522 of the latch portion 52 of the engagement block 5 becomes the lower end of the engagement hole 612 of the latch piece 61. , The latch piece 61 is driven to move downward, and the clutch piece 62 is immobile due to the support of the hook 31. After the bottom end of the latch portion 52 has passed through the engagement hole 612, the first elastic means 651 Provides a return of the latching piece 61 to its original locked state, thereby resolving the disadvantages of known constructions of the overall construction being destroyed by collisions occurring in similar situations.

  Please refer to FIG. 16 to FIG. When the latch piece 61 is caught by the protrusion of the article stored in the cabinet and cannot be lowered by gravity and cannot be opened, the drive rod 3 is turned by about 90 degrees (FIG. 16). The hook 31 drives and rotates the first driving piece 63. At this time, the convex block 636 of the first driving piece 63 is separated from the first convex column 41, but the latch piece 61 cannot be lowered by its own weight due to the inhibition of the external force. (FIG. 7), the hook 31 of the drive rod 3 strongly presses the plane 641 of the second drive positioning mechanism, and this lower pressure is applied to the bottom of the fourth fixed seat 643 of the second drive positioning mechanism 67 and the long groove 614 of the latch piece 61. As a result, the latch piece 61 is forcibly slid downward. When the drive rod 3 is turned by about 180 degrees (FIG. 9), the position of the lower end of the engagement hole 612 of the latch piece 61 becomes slightly lower than the height of the bottom end of the latch portion 52 of the engagement block 5, and all the drawers 11 The state changes from the closed state (FIG. 12) to the opened state (FIG. 13), and the second drive positioning mechanism 67 returns to the original position by the recovery force provided by the third elastic means 653. When the locking operation is performed by rotating the driving rod 3 in the reverse direction (FIG. 18), the second driving piece 64 is detached from the hook 31 at the rear end of the driving rod 3 and the pulling force of the third elastic means 653. And recover to the position.

  The latch piece 61 of the present invention moves in the latch base 4 in a vertical movement manner, whereby the operation of the latch piece 61 is hardly affected by the protrusion or fall of the article in the drawer. In comparison, the present invention has an advantage that the normal operation of the unlocking and locking can be reliably maintained, and solves the disadvantage that the conventional article does not operate normally due to the prevention of the protrusion or the fallen object.

It is a perspective view of a well-known drawer lock device. FIG. 10 is a perspective view of another known drawer lock device. FIG. 2 is an exploded perspective view of the present invention. It is a perspective view of the present invention. FIG. 3 is a partially enlarged perspective view of the present invention. FIG. 3 is an exploded perspective view of the latch structure of the present invention. FIG. 4 is a front view showing the operation of the present invention (the lock head is in a locked state). FIG. 4 is a front view showing the operation of the present invention (a state in which the lock head is turned 90 degrees and the latch piece is moved downward by gravity). FIG. 4 is a front view showing the operation of the present invention (the lock head is turned 180 degrees and the latch piece is in an unlocked state). FIG. 4 is a front view showing the operation of the present invention (the lock head is turned by 180 degrees to be in an unlocked state, the drawer is pulled out, and the latch piece is in the locked state). FIG. 5 is a front view showing the operation of the present invention (the lock head is turned by 180 degrees to be in an unlocked state, the drawn-out drawer is pushed in, and the latch piece presses and rotates the first driving piece). FIG. 5 is a side view showing the operation of the engagement block and the latch piece according to the present invention (the lock head is in a locked state). FIG. 4 is a side view showing the operation of the engagement block and the latch piece according to the present invention (the lock head assumes an unlocked state). FIG. 6 is a side view showing operation of the engagement block and the latch piece according to the present invention (the drawer is pulled out and the latch piece moves upward). FIG. 5 is a side view showing the operation of the engagement block and the latch piece according to the present invention (the drawer is pushed in and the latch piece moves downward). FIG. 5 is a front view showing the operation of the present invention when an external object presses the latch piece (the lock head is turned 90 degrees and the latch piece cannot move down due to gravity). FIG. 4 is a front view showing a state in which an external object of the present invention presses a latch piece (a state in which a lock head is turned 120 degrees and a second driving piece is moved downward by receiving pressure). FIG. 7 is a front view showing the operation of the present invention when an external object presses the latch piece (the lock head is turned by 150 degrees and the second driving piece receives the pressure and moves downward). FIG. 5 is a front view showing the operation of the present invention when an external object presses the latch piece (when the lock head is locked, the lock head is turned 90 degrees in the reverse direction and the second drive piece is restored to the original state by the third elastic means). ). FIG. 4 is a rear view of the first driving piece of the present invention. FIG. 4 is a rear view of the second drive positioning mechanism of the present invention. FIG. 3 is a perspective view showing a state in which the present invention is attached to a cabinet.

Explanation of reference numerals

Reference Signs List A lock head B drive rod C latch piece D engaging block E cabinet F engaging hole G lock head H concave groove I drive rod L through hole K engaging piece 1 cabinet 11 drawer 2 lock head 21 concave groove 3 drive rod 31 hook 4 Latch Base 41 First Convex Column 5 Engagement Block 51 Projection 511 Rear Slope 512 Front Slope 513 Upper Corner 52 Latch 521 Contact Surface 522 Slope 6 Latch Structure 61 Latch Piece 611 Groove 612 Engagement Hole 613 First Fixation Hole 614 long groove 62 clutch piece 621 second fixing seat 622 long hole 623 long groove 624 fifth fixing seat 625 circular hole 626 contact block 63 first driving piece 631 first protruding end 632 second protruding end 633 third protruding end 634 4 protruding end 635 third fixing seat 636 convex mass 637 second convex column 64 second driving piece 641 plane 642 pivot 6 43 4th fixed seat 651 1st elastic means 652 2nd elastic means 653 3rd elastic means 66 1st drive positioning mechanism 67 2nd drive positioning mechanism 68 Fixed frame 681 Support hole

Claims (8)

Mounted in a cabinet with multiple drawers, consisting of lock head, drive rod, latch base, multiple engagement blocks and latch structure,
The lock head is provided at the front end of the cabinet and is used for locking and unlocking by a user,
The front end of the drive rod is fitted into the groove of the lock core at the rear end of the lock head, and when the lock head is turned by a key, the drive rod rotates,
The latch base is a rectangular elongated hollow body, and is provided on an inner surface of the cabinet, and a first convex column is provided.
The plurality of engagement blocks are fixed to the rear end of each drawer, each of the engagement blocks has a protrusion outside the protrusion, and a latch portion is provided on both outer lower sides of the protrusion to approach the drawer of the latch portion. One end has a substantially vertical contact surface, and the upper cup of the latch portion projects from the bottom surface of the engagement block, and a slope is provided on another side of the latch portion,
The latch structure includes a latch piece, a clutch piece, and a first drive positioning mechanism. The latch piece is fitted in a latch base and can be moved up and down, and at a position corresponding to an engagement block of the latch piece. An engagement hole is provided, the size of the engagement hole is matched to the size of the protrusion of the engagement block, and the protrusion is within an appropriate horizontal movement range and can penetrate the engagement hole; The first drive positioning mechanism is installed inside the clutch piece and driven in combination with a hook provided at one end of the drive rod, and the clutch piece and the latch piece are connected by first elastic means. Drawer lock device.   2. The drawer lock device according to claim 1, wherein a groove is provided at a position corresponding to the drive rod above the latch piece, a clutch piece is fitted inside the latch piece, and an elongated hole through which the drive rod passes through the clutch piece. Wherein a circular hole is provided on one side of the clutch piece, and a long groove is provided at a position corresponding to the first convex column of the latch base below the clutch piece.   2. The drawer lock device according to claim 1, wherein the first drive positioning mechanism is composed of a first drive piece and a second elastic means, and the first drive piece is installed inside the clutch piece in a pivotal manner. A first protruding end, a second protruding end, a third protruding end, and a fourth protruding end are provided in different directions around the driving piece, and the first protruding end located above is located on one side of the driving rod, The second elastic means is provided between the first driving piece and the clutch piece to provide a restoring force after the first driving piece rotates, and corresponds to the first convex column at the third protruding end below the first driving piece. When the lock head is locked and the driving rod is turned upward, the convex block contacts the first convex column provided on the latch base, and further has a fourth protruding end. A second convex pillar is provided on one side close to the latch piece of FIG. , The upper end of the second protrusive pillars, characterized in that the contact with the inner edge of the elongated groove, the drawer locking device.   2. The drawer lock device according to claim 1, further comprising a second drive positioning mechanism, the second drive positioning mechanism being installed on a back surface of the latch piece, being connected to the clutch piece by third elastic means, and being connected to the second drive positioning mechanism. A drawer lock device, wherein the upper end plane of the positioning mechanism comes into contact with the hook at the rear end after the drive rod is turned by an appropriate angle.   5. The drawer lock device according to claim 4, wherein the second drive positioning mechanism is composed of a second drive piece and a third elastic means, wherein the second drive piece has an L shape and has a flat surface, a pivot and a fourth fixed at an upper edge. A seat is provided, the second driving piece is pivotally mounted on a circular hole of the clutch piece by a pivot and is installed on the back surface of the latch piece, and a plane located above is located on one side of the axis of the driving rod. A fourth fixed seat is provided on one side of the drive piece near the clutch piece, and the fourth fixed seat of the second drive piece passes through the long groove of the latch piece and the groove of the clutch piece, and the fourth fixed seat and the clutch piece are separated from each other. The drawer lock device, wherein the space is connected by a third elastic means.   6. The drawer lock device according to claim 5, wherein a fifth fixed seat is provided at a lower end of the inner surface of the clutch piece, and two ends of the third elastic means are provided on the clutch piece. A drawer lock device fixed to a fixed seat.   2. The drawer lock device according to claim 1, wherein the latch piece is formed as an inverted U-shaped elongated member. 2. The drawer lock device according to claim 1, wherein the latch piece has a first fixing hole, the clutch piece has a second fixing seat, and two ends of the first elastic means have the first fixing hole of the latch piece and the clutch piece. A drawer lock device, wherein the drawer lock device is fixed to the second fixed seat of the first embodiment.

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