Limiting ring of door lock and door lock applying limiting ring

Abstract

The utility model relates to a limiting ring of a door lock and the door lock applying the limiting ring. Comprising a front ring body, the inner wall of the front ring body is provided with a protrusion used for preventing a top bead from moving in the axis direction of the front ring body, the protrusion is located at the tail end of the front ring body, the protrusion extends in the circumferential direction of the axis of the front ring body to be in a circular arc shape, and a notch allowing the top bead to penetrate through the protrusion in the axis direction of the front ring body is formed in the end of the protrusion; a rear ring body located behind the protrusion extends from the tail end of the front ring body in the axis direction of the front ring body, and the inner wall of the front ring body and the inner wall of the rear ring body are arranged to be used for abutting against the top ball. According to the limiting ring, the inner wall of the front ring body and the inner wall of the rear ring body are used for limiting the top bead to be separated from the sliding piece, so that a blocking piece does not need to be additionally arranged on the sliding piece, production cost can be saved, the installation process can be simplified, and production efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a limit ring of a door lock and a door lock to which the limit ring is applied. Background Art

[0002] The Chinese utility model patent specification CN 221143867 U discloses an unlocking assembly of a door lock, which includes a sliding member and a limit ring. The sliding member can move along the axial direction of the limit ring. A detent structure composed of a top bead and a spring is arranged on the sliding member. As shown in the above-mentioned patent document Figure 6 as shown, an arc-shaped protrusion is arranged in the limit ring to block the top bead from moving along the axial direction of the limit ring, and a notch for the top bead to pass through the protrusion along the axial direction of the limit ring is formed at the end of the protrusion.

[0003] As shown in the above-mentioned patent document Figure 3 as shown, the sliding member is in the starting position in the axial direction of the limit ring, and the top bead is located on the left side of the protrusion. At this time, when the sliding member is pushed to the right, the protrusion will push down the top bead to compress the spring, so that the top bead is forced to cross the protrusion, and finally as shown in the above-mentioned patent document Figure 5 as shown, the top bead moves to the right side of the protrusion. At this time, the protrusion can block the top bead from moving to the left, so that the sliding member can stay at the Figure 5 as shown end position. If you want the sliding member to return to the Figure 3 as shown starting position thereafter, drive the sliding member to rotate through the inner handle until the top bead rotates to the notch position at the end of the protrusion, so that the top bead is no longer blocked by the protrusion. During the process of the sliding member moving back to the starting position to the left, the top bead can pass through the protrusion through the notch.

[0004] As shown in the above-mentioned patent document Figure 5 as shown, the top bead is exposed outside the limit ring. In order to prevent the top bead from separating from the sliding member under the action of the spring, a retaining piece is installed on the sliding member, and the retaining piece is used to limit the top bead from separating from the receiving groove.

[0005] This way of using the retaining piece to limit the top bead requires machining a structure for installing the retaining piece on the sliding member, which will increase the production cost. Moreover, the retaining piece is very small and inconvenient to install. Summary of the Invention

[0006] The main purpose of the utility model is to propose a limit ring of a door lock, which includes a front ring body. An inner wall of the front ring body is provided with a protrusion for blocking a top bead from moving along an axial direction of the front ring body, and the protrusion is located at a tail end of the front ring body. The protrusion extends circumferentially around the axis of the front ring body to form an arc shape, and a notch for the top bead to pass through the protrusion along the axial direction of the front ring body is formed at an end of the protrusion; a rear ring body extending along the axial direction of the front ring body is arranged behind the protrusion at the tail end of the front ring body, and inner walls of the front ring body and the rear ring body are arranged for the top bead to abut against.

[0007] The limit ring of the present utility model utilizes the inner walls of the front ring body and the rear ring body to restrict the top bead from detaching from the sliding member, so that no additional retaining piece needs to be added to the sliding member, which can not only save production costs, but also simplify the installation process and improve production efficiency.

[0008] Another object of the present utility model is to provide a door lock applying the above limit ring, which includes a sliding member and a limit ring. A spring pin structure is installed on the sliding member. The spring pin structure includes a first spring and a top bead. The sliding member can be slidably inserted into the limit ring along the axial direction of the limit ring, and the limit ring is the above limit ring.

[0009] The door lock of the present utility model applies the above limit ring, so that no additional retaining piece needs to be added to the sliding member, which can not only save production costs, but also simplify the installation process and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Shows a schematic diagram of the sliding member of the present utility model in the starting position;

[0011] Figure 2 Shows a schematic diagram of the sliding member of the present utility model in the end position;

[0012] Figure 3 Shows a schematic diagram of separating each component on the basis of Figure 1 ;

[0013] Figure 4 Shows a perspective view of the sliding member of the present utility model inserted into the limit ring;

[0014] Figure 5 Shows a schematic diagram of separating the sliding member from the limit ring on the basis of Figure 4 ;

[0015] Figure 6 Shows a front projection schematic diagram of the limit ring of the present utility model.

[0016] Reference Numerals in the Drawings:

[0017] 10 Outer handle; 20 Sliding member;

[0018] 30 Limit ring, 301 Front ring body, 302 Inner wall of the front ring body, 303 Protrusion, 304 Notch, 305 Rear ring body, 306 Inner wall of the rear ring body;

[0019] 40 First spring, 50 Top bead, 60 Second spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the solution of the present application in conjunction with the drawings.

[0021] As Figures 1 to 6 shown, a door lock includes an outer handle 10, a sliding member 20 and a limiting ring 30;

[0022] A spring pin structure is installed on the sliding member 20;

[0023] The spring pin structure includes a first spring 40 and a top bead 50;

[0024] The sliding member 20 is slidably inserted into the limiting ring 30 along the axis L of the limiting ring;

[0025] The limiting ring 30 includes a front ring body 301, and a convex portion 303 for blocking the top bead 50 from moving along the axis L of the front ring body is provided on the inner wall 302 of the front ring body, and the convex portion 303 is located at the tail end of the front ring body 301. The convex portion 303 extends circumferentially around the axis of the front ring body (i.e., the axis L of the limiting ring) and is arc-shaped, and a notch 304 for the top bead 50 to pass through the convex portion 303 along the axis direction of the front ring body is formed at the end of the convex portion 303;

[0026] A rear ring body 305 extending along the axis direction of the front ring body is provided at the tail end of the front ring body 301 and is located behind the convex portion 303. The inner wall 302 of the front ring body and the inner wall 306 of the rear ring body are arranged for the top bead 50 to abut against to prevent the top bead 50 from detaching from the sliding member 20.

[0027] As Figure 3 shown, with the convex portion as the boundary, the rear ring body is located on the left side of the convex portion, and the front ring body is located on the right side of the convex portion. In this embodiment, the axis of the front ring body coincides with the axis of the rear ring body to form the axis L of the limiting ring.

[0028] The limiting ring of this technical solution uses the inner walls of the front ring body and the rear ring body to limit the top bead from detaching from the sliding member, so that no additional retaining piece needs to be added to the sliding member, which can not only save production costs, but also simplify the installation process and improve production efficiency. During installation, after the spring and the top bead are installed on the sliding member, they can be inserted into the limiting ring to complete the installation.

[0029] In this embodiment, there are 2 top beads 50. As Figure 6 shown, there are 2 convex portions 303, which are symmetrically distributed up and down, and there are 2 notches 304, which are distributed on both sides of the convex portion 303.

[0030] The diameter of the inner wall 302 of the front ring body is equal to the diameter of the inner wall 306 of the rear ring body.

[0031] The front ring body 301 and the rear ring body 305 are integrally formed.

[0032] The sliding member 20 slides between a starting position and an ending position along the axis L of the limiting ring;

[0033] An elastic reset mechanism is provided between the outer handle 10 and the sliding member 20 to always give the sliding member 20 a tendency to return to the starting position. This technical solution facilitates the automatic reset of the sliding member by providing the elastic reset mechanism.

[0034] The elastic reset mechanism includes a second spring 60;

[0035] One end of the second spring 60 abuts against the outer handle 10, and the other end abuts against the sliding member 20. The elastic reset mechanism disclosed in this technical solution has a simple structure and is easy to implement.

Claims

1. A retaining ring for a door lock, comprising a front ring body, wherein the inner wall of the front ring body is provided with a protrusion for preventing a top ball from moving along the axis of the front ring body, the protrusion being located at the rear end of the front ring body, the protrusion extending circumferentially around the axis of the front ring body in an arc shape, and a notch formed at the end of the protrusion for the top ball to pass through the protrusion along the axis of the front ring body, characterized in that: A rear ring body located behind the protrusion extends from the tail end of the front ring body along the axial direction of the front ring body. The inner walls of the front ring body and the rear ring body are configured for the top bead to abut against.

2. The limiting ring of the door lock according to claim 1, wherein: The inner wall diameter of the front ring body is equal to the inner wall diameter of the rear ring body.

3. The limit ring of the door lock according to claim 1 or 2, characterized in that: The front ring body and the rear ring body are integrally formed.

4. A door lock comprising a sliding member and a retaining ring, wherein a spring pin structure is mounted on the sliding member, the spring pin structure comprising a first spring and a top ball, and the sliding member is slidably inserted into the retaining ring along the axis of the retaining ring, characterized in that: The limiting ring is the limiting ring described in any one of claims 1 to 3.

5. The door lock according to claim 4, characterized in that: Also included are exterior handles; The sliding member slides along the axis of the limiting ring between a starting position and an end position; An elastic reset mechanism is provided between the outer handle and the sliding member, which enables the sliding member to always have a tendency to return to the starting position.

6. The door lock according to claim 5, characterized in that: The elastic reset mechanism includes a second spring; One end of the second spring abuts against the outer handle, and the other end abuts against the sliding member.

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