Tape core

A core seat and body technology, applied in the field of tape measure cores, can solve the problems of large coil spring rewinding pre-tightening force, separation of the ruler core cover from the ruler core seat, and easy occurrence of radial deformation, so as to prevent radial distortion and deformation. , prolong the service life, the effect of firm structure

Pending Publication Date: 2017-05-24
NINGBO HONGDI MEASURING TAPE IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing fastening piece is generally formed by extending the edge of the cylinder radially inward, that is, the cooperation between the existing fastening piece and the perforation can only realize the axial limit, and the rewinding pretension of the coil spring is relatively large , during use, the core is prone to radial deformation under the tension of the coil spring, which will cause the core cover to separate from the core seat

Method used

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Examples

Experimental program
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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Such as Figure 1-9 As shown, a tape measure core includes a core base 1 and a disc-shaped core cover 2, wherein the core base 1 includes a cylindrical body 11, and one end of the body 11 is covered by a chassis 12 Hold and open the other end.

[0021] The end of the above-mentioned opening wall is provided with at least three radially inwardly protruding baffles 3 , and the baffles 3 are evenly arranged along the circumference of the opening. In this embodiment, the blocking pieces 3 are three pieces. Specifically, the side walls of the body 11 are provided with first notches 8 at intervals, and the side walls of the body between two adjacent first notches 8 form connecting pieces whose ends are suspended. 4, and the blocking piece 3 is arranged at the end of the connecting piece 4.

[0022] Correspondingly, the above-mentioned rule...

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PUM

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Abstract

The invention relates to a tape core, comprising a core seat and a disc-like core cover, wherein the core seat comprises a cylindrical body, one end of the body is covered by a base plate, the other end of the body is open, at least three radial convex blocking pieces are arranged circumferentially at the open end, the core cover is buckled into the opening, the core cover is concavely provided with pits for clamping the blocking pieces, the outer side of each pit forms an axial convex blocking wall, and a barb buckled with the blocking wall is arranged at the tail end of the blocking piece; at least three radial convex inserts are arranged on the peripheral edge of the core cover, the inserts are arranged in the circumferential direction of the core cover, and insertion holes for inserting the inserts are formed correspondingly in the side wall of the body. Compared with the prior art, the tape core has the advantages that the core cover is connected with the core seat firmly and the core cover in stress is effectively prevented from dropping from the core seat by radial and axial connection, so that the structure of the core is firmer.

Description

technical field [0001] The invention relates to the field of tape measures, in particular to a tape measure core. Background technique [0002] A tape measure generally includes a ruler box, a rotatable ruler core limited in the ruler box, a coil spring in the ruler core, and a ruler tape wound on the ruler core. The core cover on the top, and the core seat includes a chassis and a cylinder connected to the chassis. The core cover is disc-shaped, and its outer diameter is the same as that of the chassis. After the core cover and the core seat are fastened, the two The inner side of the person is exactly opposite. During the processing of the tape measure, the coil spring is now put into the cavity of the core seat, and then the core cover is fastened on the core seat, so that the coil spring is fixed in the core seat. Generally, the edge of the cylinder of the core base is provided with a fastening piece that is fastened with the core cover. Snap together. The existing f...

Claims

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Application Information

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IPC IPC(8): G01B3/10
CPCG01B3/1003
Inventor 周晓刚
Owner NINGBO HONGDI MEASURING TAPE IND CO LTD
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