A winding spool elastic locking device

Abstract

This utility model relates to an elastic locking device for a winding spool. The front section of the winding spool is hollow, and several notches are provided at the front end. The elastic locking device is installed inside the front section of the winding spool and has at least two elastic claws. Each elastic claw is evenly distributed around the circumference, and its end is respectively located in the notch at the front end of the winding spool. The end of each elastic claw is divided into front and rear sections, with the front section folded inward and the rear section folded outward to form a protrusion. The protrusion extends out of the outer circumference of the front section of the winding spool. A coil frame is fitted onto the winding spool, and the protrusion constitutes a limit for the coil frame. The design is reasonable and the structure is simple. When the coil frame is fitted onto the winding spool, the elastic claws will not scratch the inner wall of the coil frame. The coil frame fitted onto the winding spool is stable and does not loosen.

Description

Technical Field

[0001] This utility model relates to high-voltage winding wire, specifically to a winding shaft elastic locking device. Background Technology

[0002] Traditional winding spool elastic locking devices generally use an elastic steel ball design. When the coil bobbin is fitted onto the winding spool, although the steel ball rolls in contact with the inner wall of the coil bobbin, it is inevitable that the inner wall of the coil bobbin will be scratched. A coil bobbin with a scratched inner wall poses a potential hazard during use. Utility Model Content

[0003] In view of the above problems, this utility model proposes an elastic locking device for winding shafts.

[0004] The technical solution of this utility model:

[0005] A winding spool elastic locking device is disclosed, wherein the front section of the winding spool is hollow and has several notches at the front end; the elastic locking device is installed inside the front section of the winding spool and has at least two elastic claws, each elastic claw being evenly distributed around the circumference, and its ends being respectively disposed in the notches at the front end of the winding spool. The ends of the elastic claws are divided into front and rear sections, with the front section folded inward and the rear section folded outward to form protrusions, the protrusions extending out of the outer circumference of the front section of the winding spool; a coil frame is fitted onto the winding spool, and the protrusions constitute a limit for the coil frame.

[0006] Further refining the above technical solution, the elastic locking device is a one-piece molded metal part.

[0007] To further refine the above technical solution, the front end of the winding shaft is located within the outer peripheral surface formed by the front sections of the ends of each elastic claw.

[0008] Further refining the above technical solution, the protrusion is arc-shaped.

[0009] The advantages of this utility model are that it is reasonably designed and has a simple structure. When the coil frame is fitted onto the winding shaft, the elastic claws will not scratch the inner wall of the coil frame. The coil frame fitted onto the winding shaft is stable and does not loosen. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a winding shaft structure equipped with a winding shaft elastic locking device.

[0011] Figure 2 yes Figure 1 Schematic diagram of cross section in the AA direction.

[0012] Figure 3 This is a schematic diagram of a winding shaft structure (with coil frame) equipped with a winding shaft elastic locking device.

[0013] The diagram shows a winding shaft 1, an elastic locking device 2, an elastic claw 2-1, a protrusion 2-2, and a coil frame 3. Detailed Implementation

[0014] like Figure 1-3 As shown:

[0015] The front section of the winding shaft 1 is hollow, and there are two notches at the front end;

[0016] A winding spool elastic locking device, wherein the elastic locking device 2 is an integrally formed U-shaped metal part, having two elastic claws 2-1, the ends of which are divided into front and rear sections, the front section folds inward and the rear section folds outward to form a protrusion 2-2, the protrusion 2-2 being arc-shaped;

[0017] The elastic locking device 2 is installed in the front section of the winding shaft 1. The ends of each elastic claw 2-1 are respectively set in the notch at the front end of the winding shaft 1, and the protrusion 2-2 extends out of the outer circumferential surface of the front section of the winding shaft 1. The front end of the winding shaft 1 is located in the outer circumferential surface formed by the front ends of each elastic claw 2-1. The coil frame 3 is sleeved on the winding shaft 1, and the protrusion 2-1 constitutes the limit of the coil frame 3.

[0018] The above embodiments are only for illustrating the technical concept and features of the invention, and are intended to enable those skilled in the art to understand the content of the invention and implement it accordingly. They should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of the invention.

Claims

1. A spool elastic locking device, characterized by, The front section of the bobbin is hollow, and the front end is provided with a plurality of notches; the elastic locking device is installed in the front section of the bobbin, and has at least two elastic claws, each of which is uniformly distributed in a circle, and the end part of each of the elastic claws is arranged in the notch at the front end of the bobbin, the end part of each of the elastic claws is divided into a front section and a rear section, the front section is folded inward, and the rear section is folded outward to form a protrusion, and the protrusion extends outward from the outer circumferential surface of the front section of the bobbin; A coil former is sleeved on the bobbin, and the protrusion constitutes a limit of the coil former.

2. A spool elastic locking device according to claim 1, characterized in that The elastic locking device is an integrally formed metal piece.

3. A spool elastic locking device according to claim 1, characterized in that The front end of the bobbin is located in the outer circumferential surface formed by the end part of each of the elastic claws.

4. A spool elastic locking device according to claim 1, characterized in that, The protrusion is in the shape of a circular arc.

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