A latch with a pulling limiting and normally open function

Abstract

The utility model discloses a draw limiting normal open function's bolt, including lock shell and lock tongue, the lock tongue sliding connection is in the lock shell, the front end of lock shell is equipped with the opening of the lock tongue extension, the rear end of lock tongue is equipped with rotatable pull rod, the lateral wall of pull rod is equipped with the limit step, the rear end of lock shell is equipped with the limit hole that limit step and pull rod pass through, when limit step rotates around pull rod, can form the dislocation with limit hole, the rear end lateral wall of pull rod is equipped with the limit piece, the width of limit piece is greater than the width of limit hole, limit piece can be with the rear lateral wall of lock shell and fit fixed, when unlocking, limit step and limit hole dislocation, pull rod can not move forward, thereby the state of lock body maintains retraction in the lock shell, realizes the normal open of lock, thereby solves the problem that one door needs many people to draw simultaneously and unlock.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a latch with a pull-out limit and normally open function. Background Technology

[0002] Currently, the latches on the market often lack effective limiting functions during use:

[0003] Conventional pins are prone to returning to their original position after being pulled out due to accidental contact with external force, while spring pins automatically spring back under the action of the spring and are not easy to maintain in the open state.

[0004] Therefore, when multiple locks are installed, multiple people need to operate them simultaneously to keep all locks in the open state before they can be opened. This can lead to a situation where the unlocking is not smooth due to asynchronous actions. Therefore, a bolt with a pull limit and normally open function is needed to solve the problem of multiple people needing to pull and pull to unlock a door with multiple locks at the same time. Utility Model Content

[0005] The purpose of this utility model is to provide a latch with a pull-out limit and normally open function, which can solve the problem of multiple people needing to pull and unlock a door with multiple locks at the same time.

[0006] To solve the above technical problems, this utility model adopts the following technical solution: a latch with a pull-out limiting normally open function, including a lock shell and a latch, the latch being slidably connected inside the lock shell, the front end of the lock shell having an opening for the latch to extend out, the rear end of the latch having a rotatable pull rod, the side wall of the pull rod having a limiting step, the rear end of the lock shell having a limiting hole for the limiting step and the pull rod to pass through, the limiting step being able to form a misalignment with the limiting hole after rotating around the pull rod, the rear side wall of the pull rod having a limiting piece, the width of the limiting piece being greater than the width of the limiting hole, the limiting piece being able to fit and fix against the rear side wall of the lock shell.

[0007] By adopting the above technical solution, the lock body slides by sliding the lever back and forth. When locked, the front end of the lock body extends out of the opening, and the limiting plate can fit and fix against the rear side wall of the lock shell, maintaining the lock normally closed. When unlocking, the lever moves the lock body backward, so that the limiting step and the lever pass through the limiting hole, and at the same time, the lock body slides backward and retracts into the lock shell. Then, the lever is rotated, so that the limiting step and the limiting hole are misaligned. At this time, the lever cannot move forward, so the lock body remains retracted into the lock shell, realizing the lock normally open. This solves the problem of multiple locks on one door requiring multiple people to pull and pull to unlock at the same time.

[0008] Furthermore, the limiting step includes limiting blocks symmetrically arranged on both sides of the pull rod, and the limiting hole includes a circular hole and notches symmetrically arranged on both sides of the circular hole.

[0009] Furthermore, the limiting step can be fitted and fixed to the rear side wall of the lock case. The limiting step cannot rotate in the fixed state, thereby maintaining the misalignment with the limiting hole.

[0010] Furthermore, the rear end of the lock housing is provided with a magnetic sheet, the limiting sheet is made of magnetic material, and the limiting step is made of magnetic material.

[0011] Furthermore, a pull ring is provided at the rear end of the pull rod.

[0012] The beneficial effects of this utility model are as follows: When unlocking, the pull rod drives the lock body to move backward, so that the limiting step and the pull rod pass through the limiting hole, and at the same time, the lock body slides backward and retracts into the lock shell. Then, the pull rod is rotated, so that the limiting step and the limiting hole are misaligned. At this time, the pull rod cannot move forward, so the lock body remains retracted into the lock shell, realizing the lock is always open, thus solving the problem of multiple locks on one door requiring multiple people to pull and pull to unlock at the same time. Attached Figure Description

[0013] Figure 1 This is the usage state of the present utility model. Figure 1 ;

[0014] Figure 2 This is the usage state of the present utility model. Figure 2 ;

[0015] Figure 3 for Figure 1 Another perspective of the cross-sectional structural diagram.

[0016] The labels in the diagram mean: 1. Lock case; 2. Lock body; 3. Magnetic plate; 4. Pull rod; 5. Pull ring; 6. Limit plate; 7. Limit hole; 8. Limit step. Detailed Implementation

[0017] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0018] See appendix Figure 1-3 The present embodiment of this utility model further includes: a latch with a pull-out limiting normally open function, including a lock shell 1 and a latch tongue, the latch tongue being slidably connected inside the lock shell 1, the front end of the lock shell 1 having an opening for the latch tongue to extend, the rear end of the latch tongue having a rotatable pull rod 4, the side wall of the pull rod 4 having a limiting step 8, and the rear end of the lock shell 1 having a limiting hole 7 for the limiting step 8 and the pull rod 4 to pass through. Specifically, the limiting step 8 includes limiting blocks symmetrically arranged on both sides of the pull rod 4, and the limiting hole 7 includes a round hole and notches symmetrically arranged on both sides of the round hole;

[0019] When the limiting step 8 rotates around the pull rod 4, it can be misaligned with the limiting hole 7. The rear side wall of the pull rod is provided with a limiting piece 6. The width of the limiting piece 6 is greater than the width of the limiting hole 7. The limiting piece 6 can fit and be fixed to the rear side wall of the lock shell 1. The limiting step 8 can fit and be fixed to the rear side wall of the lock shell 1. The rear end of the lock shell 1 is provided with a magnetic piece 3. The limiting piece 6 is made of magnetic material. The limiting step 8 is made of magnetic material.

[0020] Furthermore, a pull ring 5 is provided at the rear end of the pull rod 4.

[0021] The principle of this utility model is as follows: the pull rod 4 slides back and forth to drive the lock body 2 to slide. When the lock is closed, the front end of the lock body 2 extends out of the opening, and the limiting piece 6 can be fixed to the magnetic piece 3 by magnetism, thereby fitting and fixing it to the rear side wall of the lock shell 1 to maintain the lock in a normally closed state.

[0022] When unlocking, the lever 4 moves the lock body 2 backward, causing the limiting step 8 and the lever 4 to pass through the limiting hole 7. At the same time, the lock body 2 slides backward and retracts into the lock case 1. Then, the lever 4 is rotated 90 degrees, causing the limiting step 8 to be misaligned with the limiting hole 7. At this time, the lever cannot move forward, so the lock body 2 remains retracted into the lock case 1. The limiting step 8 is fixed to the magnetic plate 3 by magnetism. The limiting step 8 cannot rotate in the fixed state, thus maintaining the misalignment with the limiting hole 7 and realizing the lock is always open. This solves the problem of multiple locks on one door requiring multiple people to pull and pull the lever to unlock at the same time.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A latch with a normally open pull-out limiting function, comprising a lock housing (1) and a latch, characterized in that, The latch is slidably connected inside the lock housing (1). The front end of the lock housing (1) is provided with an opening for the latch to extend. The rear end of the latch is provided with a rotatable pull rod (4). The side wall of the pull rod (4) is provided with a limiting step (8). The rear end of the lock housing (1) is provided with a limiting hole (7) through which the limiting step (8) and the pull rod (4) pass. When the limiting step (8) rotates around the pull rod (4), it can be misaligned with the limiting hole (7). The rear side wall of the pull rod (4) is provided with a limiting piece (6). The limiting piece (6) can fit and be fixed to the rear side wall of the lock housing (1).

2. A latch with a normally open pull-out limiting function according to claim 1, characterized in that, The limiting step (8) includes limiting blocks symmetrically arranged on both sides of the pull rod (4), and the limiting hole (7) includes a round hole and notches symmetrically arranged on both sides of the round hole.

3. A latch with a normally open pull-out limiting function according to claim 1, characterized in that, The limiting step (8) can be fitted and fixed to the rear side wall of the lock case (1).

4. A normally open latch with pull-out limiting function according to claim 3, characterized in that, The rear end of the lock case (1) is provided with a magnetic sheet (3), the limiting sheet (6) is made of magnetic material, and the limiting step (8) is made of magnetic material.

5. A normally open latch with pull-out limiting function according to claim 1, characterized in that, The rear end of the pull rod (4) is provided with a pull ring (5).

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