Anti-falling lock catch

Abstract

The utility model discloses an anti-drop lock catch, which comprises a first bottom plate and a hook positioned on a first side of the first bottom plate, a first fastener and a movable part are respectively arranged on the first bottom plate, a hooking part is hinged on the movable part, and one side of the first bottom plate, which faces a second side, extends to form an extending part in a convex edge manner. And the extension part is movably provided with a fastening part which is used for limiting the movable part from swinging towards the first side when the movable part is buckled on the hooking part. By arranging the extending part, the fastening part is additionally arranged outside the movable part and the first bottom plate, the influence on the matching between the movable part and the first fastener is avoided, and by virtue of the matching use of the fastening part, the movable part, the hooking part and the first fastener, after the hooking part is hooked on the hook, the movable part is buckled on the first fastener to tension the hooking part, so that the hooking part is prevented from being hooked on the hook. The locking between the hooking part and the hook is kept, the movable part is limited through the fastening part to form double locking with the first fastener, the stability of the movable part is guaranteed, and the firmness of the whole lock catch is improved.

Description

Technical Field

[0001] The utility model relates to an anti-drop lock buckle. Background Art

[0002] A lock is an object used to fasten two objects. Locks generally refer to buckle-type fasteners installed on doors, windows, and box-type structures for locking doors, windows, and box-type structure covers. They are generally composed of a movable part and a fixed part. The closing and opening of doors and windows are achieved through the combination and separation of the movable part and the fixed part. The locking installation procedure is simple, easy to use, safe, firm, and tight, and can be repeatedly closed and opened for countless times.

[0003] The hasp is a kind of lock, which is an accessory of the chassis or wooden box. It can make the box cover cover more tightly on the box body, and it can also be locked with a padlock, which is also convenient to open. The use of the hasp is to tighten the hasp hooked on the hook through the cooperation between the movable part and the lock part, so as to connect the parts where the hasp and the hook are respectively located together to achieve locking. However, the movable part and the lock are fastened by hooking and clamping. As a reusable object, the hasp is easy to loosen during multiple uses due to the wear between the movable part and the hasp part, and the vibration or collision that may exist during use, and the fixing reliability is poor. Since the movable part and the hasp part are closely matched and the gap between them is small, it is difficult to add a fastening structure between the movable part and the hasp. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an anti-drop lock to solve the problems of poor connection firmness between the movable part and the buckle part and great difficulty in adding a structure.

[0005] To solve the above technical problems, a technical solution adopted by the utility model is: to provide an anti-drop lock comprising a first bottom plate for fixedly connected to an external box body and a hook located on a first side of the first bottom plate for fixedly connected to an external box cover, a first fastener and a movable part whose free end can be buckled with the first fastener and swing toward the first side and the second side respectively are respectively arranged on the first bottom plate, a hook portion for hooking on the hook is hinged on the movable part, an extension portion is formed on a side of the first bottom plate facing the second side and extending toward a convex edge away from the hook to avoid adding a structure between the movable part and the first bottom plate and reduce the difficulty of production, a fastening portion is movably arranged on the extension portion for limiting the movable part from swinging toward the first side when the movable part is buckled on the hook portion, thereby preventing the movable part from loosening and unlocking from the first fastener and improving the stability of the lock.

[0006] Furthermore, the first bottom plate has a first connecting surface for contacting an external box body and a first operating surface distributed opposite to the first connecting surface, the first fastener is integrally formed and protrudes on the first operating surface and is gradually narrowed toward the side away from the first operating surface, and the first fastener has a guide arc surface on the side away from the first operating surface; a through hole is opened at the position of the movable part corresponding to the first fastener for the first fastener to pass through and have an interference fit with the first fastener, so that the movable part can quickly engage with the first fastener through the through hole and lock the limit.

[0007] Furthermore, a through hole is formed on the first fastener in a direction parallel to the first bottom plate, so that a lock can be hung through the through hole when needed.

[0008] Furthermore, the hook includes a second base plate for being fixedly connected to the external box cover and a barb portion extending protruding from the second base plate, and the barb portion is bent and extended toward the first side away from the side of the second base plate so that the hook portion can be hooked on the barb portion.

[0009] Furthermore, the extension portion protrudes and extends from the first base plate toward the second side, and the extension portion has a bottom surface flush with the first connecting surface to avoid affecting the installation of the first base plate. The movable part is arc-shaped and the free end is separated from the first base plate when the movable part is buckled on the first buckle, so that a fastening part is arranged outside the movable part and the first base plate to reduce the difficulty of adding the fastening part.

[0010] Furthermore, the fastening portion includes a second fastener with one end hinged to the extension portion and an elastic member respectively connected to the extension portion and the second fastener to support the second fastener toward the first side, and the second fastener has a pressing end on the end away from the extension portion for pressing the free end of the movable part when the movable part is fastened to the first fastener, so as to limit the movement of the movable part toward the first base plate when the movable part loosens toward the side away from the first base plate, thereby preventing the movable part from loosening.

[0011] Furthermore, the buckle end is formed by extending from the side of the second fastener away from the extension portion toward the first side in an arc shape, and the buckle end is inclined relative to the side of the second fastener toward the extension portion to form a hook shape so as to be buckled on the free end of the movable part.

[0012] Furthermore, the buckle end is made of a hard elastic material to increase the service life of the buckle end and the service life of the movable part.

[0013] Furthermore, the elastic member includes an extension end formed by bending and extending from the second fastener in the opposite direction relative to the buckle end, and a spring connected to the extension end and the extension part at both ends respectively. The spring always squeezes the extension end toward the side away from the extension part to provide support for the buckle end and improve the stability of the buckle end.

[0014] Furthermore, a plurality of anti-slip strips are protruding from the extension end to increase friction when the extension end is manually pulled or pressed.

[0015] Furthermore, the hooking portion includes a roller with a cylindrical structure and extension arms extending from both ends of the roller toward the second side arc, and the ends of the two extension arms away from the roller are respectively hinged to the movable parts, and the extension arms are connected and fixed to the roller by a locking pin to facilitate replacement of the roller.

[0016] The utility model provides an anti-drop lock buckle, which has at least the following beneficial effects: by setting an extension part, a fastening part is added outside the movable part and the first base plate to avoid affecting the cooperation between the movable part and the first fastener; by the cooperation between the fastening part, the movable part, the hooking part and the first fastener, after the hooking part is hooked on the hook, the movable part is buckled on the first fastener to tighten the hooking part and maintain the locking between the hooking part and the hook; the movable part is restricted by the fastening part to form a double locking with the first fastener, thereby ensuring the stability of the movable part and improving the firmness of the entire lock buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of the anti-drop lock buckle of the utility model in a locked state;

[0019] Figure 2 It is a schematic structural diagram of the anti-drop lock buckle of the utility model in an unlocked state;

[0020] Figure 3 for Figure 2 Magnified view of part A shown.

[0021] The meanings of the symbols in the accompanying drawings are:

[0022] The first base plate-1; the mounting hole-11; the hook-2; the second base plate-21; the barb portion-22; the first fastener-3; the through hole-31; the guide arc surface-32; the movable part-4; the free end-41; the through hole-42; the hook portion-5; the roller-51; the extension arm-52; the locking pin-53; the extension portion-6; the fastening portion-7; the second fastener-71; the buckle end-711; the elastic part-72; the extension end-721; the spring-722. DETAILED DESCRIPTION

[0023] The utility model will be further described below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 3As shown, an anti-drop lock buckle of the utility model comprises a first bottom plate 1 for fixedly connected to an external box body, a hook 2 located on a first side of the first bottom plate 1 for fixedly connected to an external box cover, a first fastener 3 arranged on the first bottom plate 1, a movable member 4 arranged on the first bottom plate 1 and having a free end 41 capable of swinging toward a first side and a second side respectively, a hooking portion 5 hinged on the movable member 4, an extending portion 6 convexly extended and formed on a side of the first bottom plate 1 toward the second side, and a fastening portion 7 movably arranged on the extending portion 6. When the movable member 4 swings toward the first side to get close to the hook 2 and away from the first fastener 3, the movable member 4 is locked. The hooking portion 5 can freely swing relative to the hook 2 to be mounted on the hook 2. When the movable member 4 swings toward the second side to move away from the hook 2 and approach the first fastener 3, the hooking portion 5 is pulled toward the first side by the movable member 4. When the movable member 4 is hooked on the first fastener 3, the first fastener 3 limits the swing of the movable member 4, so that the hooking portion 5 is tightened on the hook 2 so that the entire lock connected to the box body and the box cover can keep the box cover and the box body in a locked state. The fastening portion 7 is used to further lock with the movable member 4 to limit the possibility of the movable member 4 swinging toward the first side and becoming loose, thereby improving the stability and firmness of the lock. It should be noted that in the present utility model, the hook 2 and the first bottom plate 1 are spaced apart in a certain direction, and the spacing between the hook 2 and the first bottom plate 1 is used as a reference. The direction toward the hook 2 is regarded as the first side, and the direction toward the first bottom plate 1 and the direction of the first side is regarded as the second side to indicate the direction.

[0025] In this embodiment, the first base plate 1 is a plate-like structure and has a first connecting surface for contacting an external box body and a first operating surface distributed opposite to the first connecting surface. A plurality of mounting holes 11 are opened through the first base plate 1 in a direction perpendicular to the first base plate 1. Each mounting hole 11 can be a screw hole or other holes. The mounting holes 11 facilitate fixing the first base plate 1 to the box body by using fasteners such as screws, bolts, etc.

[0026] In this embodiment, the hook 2 includes a second base plate 21 for fixedly connecting to the external box cover and a barb portion 22 formed by extending from the second base plate 21, and the barb portion 22 is integrally formed with the second base plate 21 to ensure rigidity. The second base plate 21 is a block-shaped or sheet-shaped structure and has a second connection surface for contacting the external box cover and a second operating surface that is opposite to the second connection surface. A plurality of mounting holes 11 are also provided on the second base plate 21, so that the second base plate 21 can be fixed to the box cover or the box body using fasteners. The barb portion 22 is convex from one side of the second operating surface and is bent and extended toward the first side relative to the second base plate 21, so as to form a reverse buckle structure with the hook portion 5 to prevent the hook portion 5 from loosening when in a tensioned state.

[0027] In this embodiment, the first fastener 3 is integrally formed and convexly arranged on the first operating surface and is gradually narrowed toward the side away from the first operating surface. The first fastener 3 can be semi-elliptical or prism-shaped, preferably semi-elliptical, and the side of the first fastener 3 away from the first operating surface has a guide arc surface 32, and the middle part of the guide arc surface 32 is convexly arranged toward the side away from the first operating surface, so that the first fastener 3 can quickly pass through the corresponding structure on the movable member 4. In order to facilitate the application of some boxes that require the use of locks, a through hole 31 is formed on the first fastener 3 along the convex direction parallel to the first bottom plate 1 and perpendicular to the first fastener 3, and the through hole 31 is used for the lock beam of the lock to pass through.

[0028] In this embodiment, the movable member 4 is in an arc-shaped block or strip-shaped structure. The movable member 4 has two ends, one of which is hinged to the first operating surface of the first base plate 1 through a hinge. The side where the movable member 4 is hinged to the first base plate 1 is defined as the hinged end, and the other end of the movable member 4 is defined as the free end 41. The free end 41 of the movable member 4 can swing back and forth toward the first side and the second side. The first fastener 3 is located at the second side of the hinged end relative to the hinged end of the movable member 4, and the hook 2 is located at the first side of the hinged end relative to the hinged end of the movable member 4. The free end 41 of the movable member 4 is curved relative to the first base plate 1 toward the side away from the first base plate 1, so that when the movable member 4 is fastened to the first fastener 3, the free end 41 and the first base plate 1 are spaced apart in a V shape, so as to provide operating space when the movable member 4 needs to be pulled toward the first side, so as to pull the movable member 4 toward the first side. The movable member 4 is provided with a through hole 42 for the first fastener 3 to pass through at a position corresponding to the first fastener 3. The length of the through hole 42 is less than the maximum length of the first fastener 3, so that the movable member 4 is fastened to the first fastener 3 through the through hole 42 and has an interference fit with the first fastener 3 after being pressed, so that the movable member 4 is clamped to the first fastener 3. It should be noted that the position of the first fastener 3 is on the motion trajectory of the through hole 42 as the movable member 4 swings, so that the first fastener 3 corresponds to the through hole 42.

[0029] In this embodiment, the hooking part 5 is in a U-shaped structure, and the hooking part 5 includes a roller 51 in a cylindrical structure, an extension arm 52 extending from both ends of the roller 51 toward the second side arc, and a locking pin 53. A first threaded hole is provided through the roller 51 in the axial direction, and a second threaded hole coaxially and diametrically distributed with the first threaded hole is provided on one end of the two extension arms 52 in the axial direction of the roller 51. The locking pin 53 is a screw or a bolt. The locking pin 53 is inserted into the first threaded hole and the two second threaded holes by bolts to realize the connection between the roller 51 and the extension arm 52. When the roller 51 needs to be replaced to adjust the fit between the roller 51 and the hook 2, the locking pin 53 can be removed. The ends of the two extension arms 52 away from the roller 51 are respectively hinged to the side walls where the two long sides of the movable member 4 are located, and the position where the extension arm 52 is hinged to the movable member 4 is located on both sides of the part between the hinge end of the movable member 4 and the through hole 42. A through space is formed between the two extension arms 52 and the roller 51, and the width of the through space is greater than the width of the barb 22, so that the barb 22 can move into the through space. When in use, when the free end 41 of the movable member 4 is facing the first side, the hook 5 can freely swing relative to the barb 22 and be sleeved on the barb 22. When the movable member 4 is swung toward the second side, the roller 51 gradually moves toward the second side with the movable member 4 until the movable member 4 is buckled on the first buckle 3, and the roller 51 presses against the barb 22 toward the second side, so that the fastening between the hook 2 and the movable member 4 can be achieved through the cooperation between the hook 5 and the movable member 4 to complete the locking.

[0030] In this embodiment, the extension portion 6 is formed by extending from the side of the first bottom plate 1 toward the second side and protruding relative to the first bottom plate 1 toward the side away from the hook 2, so that the extension portion 6 does not affect the cooperation between the movable member 4 and the first bottom plate 1. The extension portion 6 has a bottom surface flush with the first connection surface, so that the extension portion 6 does not hinder the connection between the first bottom plate 1 and the box body, and the bottom surface can be supported on the box body to provide support for the fastening portion 7 on the extension portion 6. Preferably, the thickness of the extension portion 6 is less than the thickness of the first bottom plate 1 so that the extension portion 6 and the corresponding side of the first bottom plate 1 form an L-shaped step, so as to provide more space for the fastening portion 7 and facilitate the arrangement of the fastening portion 7.

[0031] In this embodiment, the fastening portion 7 includes a second fastener 71 with one end hinged to the extension portion 6 and an elastic member 72 respectively connected to the extension portion 6 and the second fastener 71 to support the second fastener 71 toward the first side. The elastic member 72 allows the second fastener 71 to always be squeezed and swung toward the first side. After the movable member 4 is fastened to the first fastener 3, the elastic member 72 supports the second fastener 71 so that the second fastener 71 is pressed against the free end 41 of the movable member 4.

[0032] In the content defined in this embodiment, the second fastener 71 is in an L-shaped structure, one end of the second fastener 71 is hinged to the extension portion 6 by a hinge, and the end of the second fastener 71 away from the extension portion 6 is bent and extended toward the first side to form a buckling end 711 that buckles the free end 41 of the movable part 4 when the movable part 4 is buckled on the first fastener 3, and the buckling end 711 is inclined relative to the second fastener 71 toward the side of the extension portion 6 to be hooked. When the movable part 4 is buckled on the first fastener 3, the buckle end 711 is buckled on the free end 41 of the movable part 4. At this time, the free end 41 of the movable part 4 is tilted outward relative to the first bottom plate 1 to be buckled with the buckle end 711, and the elastic part 72 makes the buckle end 711 elastically pressed against the free end 41 of the movable part 4. When the movable part 4 is loose, the movement direction of the movable part 4 makes the direction of the force applied by the movable part 4 on the buckle end 711 different from the loosening direction of the buckle end 711. Therefore, the free end 41 of the movable part 4 cannot be loosened from the first fastener 3. Only when an external force is applied to the buckle end 711 toward the second side or toward one side of the extension part 6, the buckle end 711 will loosen the free end 41 of the movable part 4, so that the movable part 4 can be fastened. In order to reduce the wear change between the buckle end 711 and the free end 41 of the movable part 4, the material of the buckle end 711 can be selected from a hard elastic material, such as metal, plastic, etc.

[0033] In the content defined in this embodiment, the elastic member 72 includes an extension end 721 formed by bending and extending from the second fastener 71 in the opposite direction relative to the buckle end 711, and a spring 722 whose two ends are respectively connected to the extension end 721 and the extension portion 6. The extension end 721 is integrally formed from the second fastener 71 to ensure the stability of strength. The buckle end 711 and the extension end 721 extend in opposite directions respectively so as not to interfere with each other. The extension end 721 facilitates the spring 722 to squeeze the second fastener 71. The spring 722 is in a compressed state and always squeezes the extension end 721 toward the side away from the extension portion 6. In order to facilitate the swinging of the extension end 721 so that the extension end 721 moves toward the side away from the buckle end 711, as a preferred embodiment, a plurality of anti-slip strips are convexly provided on the extension end 721 to increase the friction between the extension end 721 and the object or human finger contacting the extension end 721, so as to facilitate the application of force to the extension end 721. Alternatively, a plurality of anti-slip strips can be provided on the buckle end 711 to directly apply force to the buckle end 711.

[0034] The working method of one embodiment of an anti-drop lock of the utility model is as follows: in the initial state, the movable part 4 swings to one side of the second side, and the hooking part 5 is not mounted on the hook 2. When it needs to be fastened, the movable part 4 is swung toward the first side until the hooking part 5 is engaged on the hook 2, and then the movable part 4 is swung toward one side of the second side. The free end 41 of the movable part 4 gradually moves toward the buckle end 711 until it contacts the buckle end 711. The inclined buckle end 711 and the curved free end 41 of the movable part 4 squeeze the buckle end 711 toward the second side until the buckle end 711 and the free end 41 are buckled together. At this time, the roller 51 is pressed against the hook 2 to achieve locking.

Claims

1. An anti-drop lock, comprising a first bottom plate for fixedly connecting to an external box body and a hook located on a first side of the first bottom plate for fixedly connecting to an external box cover, a first fastener and a movable member whose free end can be fastened with the first fastener and swing toward a first side and a second side respectively are respectively arranged on the first bottom plate, and a hooking portion for hooking on the hook is hinged on the movable member, characterized in that: An extension portion is formed on the first bottom plate on one side facing the second side and extending away from the convex edge of the hook side. A fastening portion is movably provided on the extension portion for limiting the movable member from swinging toward the first side when the movable member is buckled on the hook portion.

2. The anti-drop lock according to claim 1, characterized in that: The first bottom plate has a first connecting surface for contacting an external box body and a first operating surface distributed opposite to the first connecting surface. The first fastener is integrally formed and protrudes on the first operating surface and is gradually narrowed toward the side away from the first operating surface, and the first fastener has a guiding arc surface on the side away from the first operating surface; a through hole is opened at the position of the movable part corresponding to the first fastener for the first fastener to pass through and interfere with the first fastener; a through hole is opened on the upper edge of the first fastener in a direction parallel to the first bottom plate.

3. The anti-drop lock buckle according to claim 1, characterized in that: The hook comprises a second bottom plate for fixedly connecting to the external box cover and a barb portion extending and protruding from the second bottom plate, wherein the barb portion bends and extends from a side away from the second bottom plate toward the first side.

4. The anti-drop lock buckle according to claim 2, characterized in that: The extension portion convexly extends from the first bottom plate toward the second side, and has a bottom surface flush with the first connecting surface. The movable member is arc-shaped and the free end is spaced from the first bottom plate when the movable member is buckled on the first buckle.

5. The anti-drop lock buckle according to claim 4, characterized in that: The fastening portion includes a second fastener hinged at one end to the extension portion and an elastic member respectively connected to the extension portion and the second fastener to support the second fastener toward the first side, and the second fastener has a buckling end at one end away from the extension portion for buckling the free end of the movable member when the movable member is buckled on the first fastener.

6. The anti-drop lock buckle according to claim 5, characterized in that: The buckle end is formed by extending from the side of the second fastener away from the extension portion toward the first side in an arc shape, and the buckle end is inclined relative to the side of the second fastener toward the extension portion to form a hook shape.

7. An anti-drop lock buckle according to claim 6, characterized in that: The buckle end is made of hard elastic material.

8. An anti-drop lock buckle according to any one of claims 5 to 7, characterized in that: The elastic member comprises an extension end formed by bending and extending from the second fastener in the reverse direction relative to the buckle end, and a spring connected to the extension end and the extension portion at both ends respectively, and the spring always presses the extension end toward the side away from the extension portion.

9. An anti-drop lock buckle according to claim 8, characterized in that: A plurality of anti-slip strips are protrudingly provided on the extending end.

10. The anti-drop lock buckle according to claim 1, characterized in that: The hooking part includes a roller with a cylindrical structure and extension arms extending from both ends of the roller toward the second side arc, and one end of the two extension arms away from the roller is respectively hinged to the movable part, and the extension arm is connected and fixed to the roller by a locking pin.

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