Latch bolt reversing structure of door lock

Abstract

The utility model discloses a latch bolt reversing structure of a door lock. The side end of the upper portion of a latch bolt installation block abuts against a torsion spring. The connecting pin abuts against an annular groove in the upper end of the positioning pin so as to limit axial movement of the positioning pin. The bottom box and the cover plate are provided with through holes corresponding to the connecting pins; a torsional spring clamping groove is formed in the side end of the upper portion of the latch bolt installation block, and a torsional spring is embedded in the torsional spring clamping groove and abuts against the connecting pin. Concave rings are arranged at the two ends of the connecting pin, the outer ends of the concave rings are straight faces perpendicular to the axis of the connecting pin, the inner ends of the concave rings are inclined faces, and the torsional springs are clamped in the concave rings. According to the reversing mechanism, reversing of the latch bolt of the door lock can be achieved rapidly and conveniently, meanwhile, it is guaranteed that the latch bolt is accurate in positioning after reversing, connection reliability is high, and movement reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a reversing structure of a locking tongue of a door lock. Background Art

[0002] The locking tongue of a door lock needs to adapt to the left-opening or right-opening of the door for direction change. Most of the reversing structures of door locks in the prior art use threaded connections. Before reversing, the threads are loosened, and after reversing, the screws are tightened. On the one hand, the threaded connection is prone to looseness under the vibration of opening and closing the door for a long time, resulting in the failure of the lock; on the other hand, when the locking tongue is reversed, some threaded parts to be disassembled have the risk of loss; on the other hand, special tools are required for on-site thread tightening, and the operation is extremely inconvenient. Content of the Utility Model

[0003] To solve the above technical problems, the purpose of the utility model is to provide a reversing structure of a locking tongue of a door lock. A slideway is arranged in the bottom box, and the locking tongue mounting block slides on the slideway. Clamping blocks are arranged at the upper two side ends of the locking tongue mounting block corresponding to the clamping seats at the lower end of the slideway, and the upper side end of the locking tongue mounting block abuts against a torsion spring; a through hole in the up-and-down direction is arranged on the locking tongue mounting block, positioning holes are arranged at both ends of the through hole, the locking tongue, the positioning pin, and the reversing positioning pin are of an integrated structure, the positioning pin is inserted into the through hole, and the reversing positioning pin is inserted into the positioning hole; a connecting pin hole perpendicular to the through hole is further arranged on the locking tongue mounting block, a connecting pin is inserted into the connecting pin hole, and the connecting pin abuts against the annular groove at the upper end of the positioning pin to limit the axial movement of the positioning pin;

[0004] The bottom box is provided with a through hole I corresponding to the connecting pin, and the cover plate is provided with a through hole II corresponding to the connecting pin;

[0005] A torsion spring groove is arranged at the upper side end of the locking tongue mounting block, and the torsion spring is embedded in the torsion spring groove and abuts against the connecting pin;

[0006] Concave rings are arranged at both ends of the connecting pin, the outer end of the concave ring is a straight surface perpendicular to the axis of the connecting pin, and the inner end of the concave ring is an inclined surface, and the torsion spring is stuck in the concave ring.

[0007] The diameter of the through hole II is smaller than the diameter of the connecting pin, and the diameter of the connecting pin is smaller than the diameter of the through hole I. The purpose of such a setting is to ensure that the connecting pin can be separated from the annular groove at the upper end of the positioning pin only by pressing the connecting pin from the direction of the cover plate, so that the positioning pin can be pulled out from the locking tongue mounting block 3;

[0008] To ensure that the connecting pin cannot be separated from the bottom box during daily operation, the axes of the through hole II and the through hole I are not on the same straight line as the axis of the connecting pin;

[0009] Preferably, the positioning holes are symmetrically arranged at both ends of the through hole;

[0010] Preferably, the axes of the second through-hole and the first through-hole are higher than the axis of the connecting pin.

[0011] The advantages of the present utility model are as follows:

[0012] First, the first inclined tongue, the inclined tongue positioning pin, and the commutation positioning pin are of an integral structure, with high structural and connection reliability;

[0013] Second, at the mating part of the connecting pin and the torsion spring, the upper and lower ends are straight surfaces, and the middle two ends are inclined surfaces. The straight surfaces prevent the connecting pin from disengaging from the torsion spring at both ends, avoiding the loss of components;

[0014] Third, the commutation position of the inclined tongue is not within the normal movement stroke of the inclined tongue, avoiding the disengagement of the connecting pin, and the structure has high operating reliability;

[0015] Fourth, at the mating part of the connecting pin and the torsion spring, the upper and lower ends are straight surfaces, and the middle two ends are inclined surfaces. While the straight surfaces prevent the connecting pin from disengaging from the torsion spring at both ends, the inclined surfaces can make the connecting pin tangent to the torsion spring and move towards the middle, facilitating commutation and having high structural connection reliability.

[0016] Fifth, the bottom box uses a hole larger than the diameter of the connecting pin, and the cover plate uses a hole smaller than the diameter of the connecting pin, which not only prevents the connecting pin from accidentally disengaging from the bottom box after commutation but also clarifies the commutation direction. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is Figure 1 a sectional view taken along the A-A position of

[0019] Figure 3 is Figure 1 a sectional view taken along the C-C position of

[0020] Figure 4 is a schematic structural diagram of the connecting pin;

[0021] Figure 5 is a schematic diagram of the through-hole dimensions of the connecting pin, the first through-hole of the bottom box, and the second through-hole of the cover plate;

[0022] Figure 6 is a schematic diagram of the through-hole positions of the connecting pin, the first through-hole of the bottom box, and the second through-hole of the cover plate in the non-commutation state. Detailed Embodiment

[0023] The present utility model will be specifically described below in conjunction with the accompanying drawings. As shown in the figure, a slideway 71 is provided in the bottom box 7, and the inclined tongue mounting block 3 slides on the slideway 71. Clamping blocks 31 are provided at the upper two side ends of the inclined tongue mounting block and correspond to the clamping seats 72 at the lower end of the slideway 71. The upper side end of the inclined tongue mounting block 3 abuts against the torsion spring 4; a through hole in the vertical direction is provided in the inclined tongue mounting block. Positioning holes 33 are provided at both ends of the through hole 32. The inclined tongue 2, the positioning pin 5, and the commutation positioning pin 6 are of an integral structure. The positioning pin 5 is inserted into the through hole 32, and the commutation positioning pin 6 is inserted into the positioning hole 33; the inclined tongue mounting block 3 is also provided with a connecting pin hole 34 perpendicular to the through hole. The connecting pin 1 is inserted into the connecting pin hole, and the connecting pin 1 abuts against the annular groove 51 at the upper end of the positioning pin 5 to limit the axial movement of the positioning pin;

[0024] A torsion spring slot is provided at the upper side end of the inclined tongue mounting block 3, and the torsion spring is embedded in the torsion spring slot and abuts against the connecting pin 1;

[0025] Concave rings 101 are provided at both ends of the connecting pin 1. The outer end of the concave ring 101 is a straight surface 104 perpendicular to the axis of the connecting pin 1, and the inner end of the concave ring 101 is an inclined surface 103. The torsion spring 4 is stuck in the concave ring 101;

[0026] The position of the torsion spring slot is such that when one end concave ring of the connecting pin corresponds to the torsion spring, the connecting pin is embedded in the annular groove 51, and when the other end concave ring of the connecting pin corresponds to the torsion spring, the connecting pin disengages from the annular groove 51.

[0027] The bottom box 7 is provided with a through hole one corresponding to the connecting pin 1, and the cover plate 8 is provided with a through hole two corresponding to the connecting pin 1. The diameter of the through hole two is smaller than the diameter of the connecting pin, and the diameter of the connecting pin is smaller than the diameter of the through hole one. For example, the diameter of the connecting pin is φ4, the diameter of the through hole two is φ3, and the diameter of the through hole one is φ4.3. The purpose of such a setting is to ensure that only by pressing the connecting pin 1 from the direction of the cover plate 8 can the connecting pin 1 be disengaged from the annular groove 51 at the upper end of the positioning pin 5, so that the positioning pin 5 can be pulled out from the inclined tongue mounting block 3;

[0028] To ensure that the connecting pin cannot disengage from the bottom box 7 during daily operation, the axes of the through hole two and the through hole one are not on the same straight line as the axis of the connecting pin; preferably, the axes of the through hole two and the through hole one are higher than the axis of the connecting pin by h, and h is generally 0.8 - 1.2 mm.

[0029] The torsion spring is arranged on the torsion spring shaft and the clamping seat in the bottom box.

[0030] The inclined tongue, inclined tongue positioning pin and commutation positioning pin of the utility model are of an integrated structure, and are connected through a connecting pin installed on the inclined tongue mounting block, and a spring installed in the bottom box provides a pre-pressure for the connecting pin; the torsion spring not only provides a pre-pressure for the inclined tongue, but also limits the connecting pin before and after commutation; the commutation position of the inclined tongue is not within the normal movement stroke of the inclined tongue, which can prevent the connecting pin from disengaging; the two ends of the connecting pin and the torsion spring are straight surfaces, and the middle is a bevel structure. The straight surface prevents the connecting pin from disengaging from the torsion spring at both ends, and the bevel surface enables the connecting pin to be tangent to the torsion spring, which is convenient for the torsion spring to move towards the middle; the bottom box uses a hole larger than the diameter of the connecting pin, and the cover plate uses a hole smaller than the diameter of the connecting pin, which can prevent the connecting pin from accidentally disengaging from the bottom box after commutation and clarify the commutation direction.

Claims

1. A door lock oblique tongue reversing structure, characterized in that: A slideway is arranged in the bottom box, and the oblique tongue mounting block slides on the slideway. Blocks are arranged on the upper two side ends of the oblique tongue mounting block to correspond to the seat at the lower end of the slideway, and the upper side end of the oblique tongue mounting block abuts against the torsion spring; the oblique tongue mounting block is provided with a through hole in the up and down directions, and positioning holes are arranged at both ends of the through hole. The oblique tongue, the positioning pin, and the reversing positioning pin are an integrated structure, the positioning pin is inserted into the through hole, and the reversing positioning pin is inserted into the positioning hole; the oblique tongue mounting block is also provided with a connecting pin hole perpendicular to the through hole, the connecting pin is inserted into the connecting pin hole, and the connecting pin abuts against the annular groove at the upper end of the positioning pin; The bottom box is provided with a through hole 1 corresponding to the connecting pin, and the cover plate is provided with a through hole 2 corresponding to the connecting pin; A torsion spring slot is provided at the upper side end of the oblique tongue mounting block, and the torsion spring is embedded in the torsion spring slot and abuts against the connecting pin; Concave rings are arranged at both ends of the connecting pin, the outer end of the concave ring is a straight surface perpendicular to the axis of the connecting pin, the inner end of the concave ring is an inclined surface, and the torsion spring is clamped in the concave ring.

2. The door lock oblique tongue reversing structure according to claim 1, characterized in that: The diameter of the second through hole is smaller than the diameter of the connecting pin, and the diameter of the connecting pin is smaller than the diameter of the first through hole.

3. The oblique tongue reversing structure of the door lock according to claim 1, characterized in that: The axes of the second through hole and the first through hole are not in the same straight line as the axis of the connecting pin.

4. The oblique tongue reversing structure of the door lock according to claim 1, characterized in that: The positioning holes are symmetrically arranged at two ends of the through hole.

5. The oblique tongue reversing structure of the door lock according to claim 1, characterized in that: The axes of the second through hole and the first through hole are higher than the axis of the connecting pin.

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