A breast diameter measuring device

Abstract

The utility model discloses a kind of breast diameter measuring devices, including tape box, the front end of tape box is fixedly installed with attached measurement structure, the output port of tape box is stretched with measuring tape, the stretched end of measuring tape is fixedly connected with connecting clamping post, the upper end of connecting clamping post is fixedly installed with pinch piece, the rear end of tape box is fixedly installed with holding handle.The utility model relates to a kind of breast diameter measuring devices, the breast diameter measuring device in use, when measuring spring piece outer side surface extrusion to trunk measuring position, will occur deformation, so that measuring spring piece is closely attached to trunk, simultaneously with the contraction of measuring tape closely attached to trunk, to obtain final accurate reading in the position of rectangular mouth, wherein measuring spring piece can adapt to the deformation of various thicknesses of trunk closely attached to trunk and measure, avoid the error caused by the gap of traditional radian invariable measurement, so the breast diameter measuring device is more accurate, and can adaptability measurement.

Claims

1. A device for measuring breast diameter, characterized in that: The measuring tape box (1) is equipped with a measuring structure (2) fixedly installed at the front end of the measuring tape box (1). A measuring tape (3) extends from the output port of the measuring tape box (1). A connecting pin (4) is fixedly connected to the extended end of the measuring tape (3). A pinch piece (5) is fixedly installed at the upper end of the connecting pin (4). A gripping handle (6) is fixedly installed at the rear end of the measuring tape box (1). The measuring structure (2) includes a right spring frame (21), a left spring frame (22), a measuring spring (23), a connecting slot (24), a rectangular opening (25), a first guide roller (26), and a second guide roller (27).

2. The sternal diameter measuring device according to claim 1, characterized in that: The right spring frame (21) is fixedly installed on the front end face of the measuring tape box (1) near one side edge, and the left spring frame (22) is fixedly installed on the front end face of the measuring tape box (1) near the other side edge. The front ends of the right spring frame (21) and the left spring frame (22) are fixedly connected to the measuring spring (23). One end of the measuring spring (23) is fixedly installed with a connecting slot (24), and the other end of the measuring spring (23) is fixedly installed with a rectangular opening (25). A first guide roller (26) is fixedly installed at the inlet edge of the rectangular opening (25), and a second guide roller (27) is fixedly installed on the inner side of the left spring frame (22).

3. The sternal diameter measuring device according to claim 2, characterized in that: The measuring tape (3) passes around the second guide roller (27) and the first guide roller (26) and passes through the rectangular opening (25) to be fixedly connected to the connecting pin (4).

4. The sternal diameter measuring device according to claim 3, characterized in that: The connecting pin (4) and the connecting slot (24) are matched and set together. The spiral spring inside the tape measure box (1) always provides a pulling force to the measuring tape (3) to roll inward.

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