Self-locking type lock catch

Abstract

A self-locking type lock catch comprises a base, a transverse shaft, a longitudinal guide rod, a spring, a lock piece, a driving block and a polished rod bolt, the transverse shaft is arranged on a horizontal hinge seat and extends out of the two ends of the horizontal hinge seat, a driven plate is in sliding fit with a sliding cavity, a hook seat plate is in sliding fit with a longitudinal limiting hole, the spring is arranged between the hook seat plate and a lower seat body, and the longitudinal guide rod is in sliding fit with a guide hole. The upper end and the lower end are respectively fixed with the upper seat body and the lower seat body; in a locking state, the hook part is flush with the upper end of the rear stop plate; the polished rod bolt penetrates through the guide limiting hole to be screwed with the driving block, and the locking plate is in sliding fit with the sliding groove and corresponds to the locking groove; and in a locking state, the locking plate is embedded into the locking groove, and the spring is in an extending state. The lock piece moves up and down, the box body and the box cover are locked through the clasp, after locking, the lock piece and the base are self-locked, and mistaken opening prevention is achieved.

Description

Technical Field

[0001] This utility model relates to a box, and more particularly to a lock for a box. Background Technology

[0002] The existing technology, Chinese patent 202020367642.6, describes a sealing box door structure, including a box body, a box lid, a sealing ring, a locking post, a locking plate, a locking base, and a locking handle. The box lid is fastened to the opening of the box body, and a sealing ring is provided between the box body and the box lid. The locking post is fixedly installed on the other side of the box body opening, and the locking base is fixedly installed on the other side of the box lid. The lower end of the locking plate is hinged to the locking base, and the lower end of the locking handle is hinged to the locking plate. The upper part of the locking plate is fastened to the locking post, and the hook plate on the upper part of the locking plate is engaged with the bottom surface of the locking post. The outer wall of the eccentric sleeve at the lower end of the locking handle abuts against the top surface of the locking post, forming a downward pressure. Problems: It cannot achieve self-locking and prevents unlocking. Utility Model Content

[0003] The purpose of this utility model is to provide a self-locking latch, which has the feature of self-locking and preventing accidental locking after the box is locked.

[0004] This utility model is implemented as follows: a self-locking latch, characterized in that it includes a base, a horizontal shaft, a vertical guide rod, a spring, a locking element, a driving block, and a smooth rod bolt.

[0005] The base includes a longitudinal base plate, a horizontal hinge seat at the top, a rear cavity with a rear opening, a rear stop plate, a sliding cavity with a front opening, a longitudinal limiting hole, an upper seat body, and a lower seat body. The side wall plate of the sliding cavity is provided with a locking groove.

[0006] The locking mechanism includes a driven plate, a hook base plate and a hook, a guide limiting hole and a sliding groove provided on the driven plate, and a guide hole provided on the hook base plate;

[0007] The drive block includes a locking plate at one end;

[0008] The horizontal axis is mounted on the horizontal hinge seat and extends from both ends of the horizontal hinge seat. The driven plate slides into the sliding cavity, and the hook seat plate slides into the longitudinal limiting hole. The spring is located between the hook seat plate and the lower seat body. The longitudinal guide rod slides into the guide hole, and its upper and lower ends are fixed to the upper and lower seat bodies, respectively. In the locked state, the upper ends of the hook and the rear stop plate are flush. The smooth rod bolt passes through the guide limiting hole and is screwed into the drive block. The locking plate slides into the sliding groove, and the locking groove corresponds to the locking plate. In the locked state, the locking plate is engaged with the locking groove, and the spring is in the extended state.

[0009] The self-locking latch is characterized in that: the front surface of the driven plate is provided with an annular protrusion surrounding the guide limiting hole, and the rear surface is provided with a countersunk hole;

[0010] The drive block is provided with a limiting cavity with a rear opening, and the locking plate is provided on the rear end face of the drive block;

[0011] The annular protrusion is inserted into the limiting cavity, and the annular protrusion in the limiting cavity is engaged and stopped, allowing the head of the smooth bolt to move within the countersunk hole.

[0012] The self-locking latch is characterized in that the length of the drive block in the left-right direction is less than the width of the sliding cavity.

[0013] The self-locking latch is characterized in that the locking groove is provided on a left wall plate or a right wall plate.

[0014] The self-locking latch is characterized in that: the lower end of the guide hole is provided with an upper spring cavity, and the upper end of the spring is inserted into the upper spring cavity.

[0015] The self-locking buckle is characterized in that the hooks are located at both ends of the hook base plate and avoid the upper base body.

[0016] This utility model discloses a self-locking latch. The locking element moves up and down to lock the box body and the box lid together. After locking, the locking element and the base self-lock to prevent accidental opening. Attached Figure Description

[0017] Figure 1 This is the front view of this utility model.

[0018] Figure 2 yes Figure 1 A-A view.

[0019] Figure 3 yes Figure 1 B-B view.

[0020] Figure 4 This is one of the exploded perspective views of this utility model.

[0021] Figure 5 This is the second exploded perspective view of this utility model.

[0022] Figure 6 This is a perspective view of the present invention. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a self-locking latch includes a base 1, a horizontal shaft 2, a vertical guide rod 3, a spring 4, a locking element 5, a driving block 6, and a smooth rod bolt 7.

[0026] The base 1 includes a longitudinal base plate 11, a horizontal hinge seat 12 disposed on the top of the longitudinal base plate 11, a rear cavity 13 with a rear opening, a rear stop plate 14, a sliding cavity 15 with a front opening, a longitudinal limiting hole 16, an upper seat body 171, and a lower seat body 172. The side wall of the sliding cavity 15 is provided with a locking groove 151; the rear stop plate 14 is disposed on the two side walls of the rear cavity 13, the sliding cavity 15 extends into the rear cavity 13, and the upper seat body 171 and the lower seat body 172 are disposed at the upper and lower parts of the longitudinal limiting hole 16.

[0027] The locking component 5 includes a driven plate 51, a hook base plate 52, and a hook 53. A guide limiting hole 54 and a sliding groove 55 are provided on the driven plate 51. The hook base plate 52 is provided with a guide hole 521, the axis of which is perpendicular to the hook base plate 52. The guide limiting hole 54 and the sliding groove 55 are on a straight line. The hook 53 is located at the rear of the hook base plate 52.

[0028] The drive block 6 includes a locking plate 61 at one end;

[0029] The horizontal axis 2 is mounted on the horizontal hinge seat 12 and extends from both ends of the horizontal hinge seat 12. The driven plate 51 is slidably engaged with the sliding cavity 15, and the hook seat plate 52 is slidably engaged with the longitudinal limiting hole 16. The spring 4 is located between the hook seat plate 52 and the lower seat body 172. The longitudinal guide rod 3 is slidably engaged with the guide hole 521. The upper and lower ends of the longitudinal guide rod 3 are fixed to the upper seat body 171 and the lower seat body 172, respectively. In the locked state, the hook 53 and the upper end of the rear stop plate 14 are flush. The smooth rod bolt 7 passes through the guide limiting hole 54 and is screwed into the drive block 6. The locking plate 61 is slidably engaged with the sliding groove 55 and the locking groove 151 corresponds to it. In the locked state, the locking plate 61 is engaged with the locking groove 151, and the spring 4 is in the extended state. The hook 53 locks the box body and the box cover.

[0030] As a further improvement of this utility model: the front surface of the driven plate 51 is provided with an annular protrusion 541 surrounding the guide limiting hole 54, and the rear surface is provided with a countersunk hole 542.

[0031] The drive block 6 is provided with a limiting cavity 62 with a rear opening, and the locking plate 61 is provided on the rear end face of the drive block 6.

[0032] The annular protrusion 541 is inserted into the limiting cavity 62, and the annular protrusion 541 of the limiting cavity 62 is engaged and stopped, and the head of the smooth rod bolt 7 moves within the countersunk hole 541.

[0033] As a further improvement of this utility model: the length of the drive block 6 in the left-right direction is less than the width of the sliding cavity 15.

[0034] The locking groove 151 is provided on the right wall plate of the sliding cavity 15, or it can be provided on the left wall plate.

[0035] As a further improvement of this utility model: the lower end of the guide hole 521 is provided with an upper spring cavity 522, and the upper end of the spring 4 is inserted into the upper spring cavity 522.

[0036] As a further improvement of this utility model: the hook 53 is provided at both ends of the hook base plate 52 and avoids the upper seat body 171.

[0037] like Figure 1 , Figure 2 As shown, hook 53 locks the box body and lid together. In the locked state, Figure 1 In the middle, the drive block 6 moves to the left, stopping the engagement between the limiting cavity 62 and the annular protrusion 541, and separating the locking plate 61 from the locking groove 151; then, the drive block 6 moves downward, the driven plate 51 moves downward in the sliding cavity 15, and the hook seat plate 52 moves downward in the longitudinal limiting hole 16 and compresses the spring 6; thus unlocking. The drive block 6 loses power, and under the action of the spring, the locking member 5 automatically moves upward.

[0038] In the unlocked state, the drive block 6 moves downward, then the drive block 6 loses power, and the lock 5 moves upward automatically to lock the box and the lid. Then the drive block 6 moves to the right, and the locking plate 61 engages with the locking groove 151 to achieve self-locking and prevent accidental operation.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-locking latch, characterized in that: Includes base, horizontal shaft, vertical guide rod, spring, locking mechanism, drive block, and smooth rod bolt. The base includes a longitudinal base plate, a horizontal hinge seat at the top, a rear cavity with a rear opening, a rear stop plate, a sliding cavity with a front opening, a longitudinal limiting hole, an upper seat body, and a lower seat body. The side wall plate of the sliding cavity is provided with a locking groove. The locking mechanism includes a driven plate, a hook base plate and a hook, a guide limiting hole and a sliding groove provided on the driven plate, and a guide hole provided on the hook base plate; The drive block includes a locking plate at one end; The horizontal axis is mounted on the horizontal hinge seat and extends from both ends of the horizontal hinge seat. The driven plate slides into the sliding cavity, and the hook seat plate slides into the longitudinal limiting hole. The spring is located between the hook seat plate and the lower seat body. The longitudinal guide rod slides into the guide hole, and its upper and lower ends are fixed to the upper and lower seat bodies, respectively. In the locked state, the upper ends of the hook and the rear stop plate are flush. The smooth rod bolt passes through the guide limiting hole and is screwed into the drive block. The locking plate slides into the sliding groove, and the locking groove corresponds to the locking plate. In the locked state, the locking plate is engaged with the locking groove, and the spring is in the extended state.

2. The self-locking latch according to claim 1, characterized in that: The driven plate has an annular protrusion surrounding the guide limiting hole on its front surface and a countersunk hole on its rear surface. The drive block is provided with a limiting cavity with a rear opening, and the locking plate is provided on the rear end face of the drive block; The annular protrusion is inserted into the limiting cavity, and the annular protrusion in the limiting cavity is engaged and stopped, allowing the head of the smooth bolt to move within the countersunk hole.

3. The self-locking latch according to claim 1, characterized in that: The length of the drive block in the left-right direction is less than the width of the sliding cavity.

4. The self-locking latch according to claim 1, characterized in that: The locking groove is provided on a left wall plate or a right wall plate.

5. A self-locking latch according to claim 1, characterized in that: The lower end of the guide hole is provided with an upper spring cavity, and the upper end of the spring is inserted into the upper spring cavity.

6. A self-locking latch according to claim 1, 2, 3, 4 or 5, characterized in that: The hooks are located at both ends of the hook base plate and avoid the upper seat body.

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