JPS5815881Y2 - Zero point adjustment device for ultra-thin scales - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a zero point adjustment device for an ultra-thin weight scale equipped with a double magnification mechanism.

Ultra-thin weighing scales are constructed so that the amount of load sinking of the treadle is much smaller than that of conventional products, so it is necessary to double the operating amount of the rack that rotates the weight scale plate.

For this reason, a double enlargement mechanism is adopted, but the feature of the present invention is that the zero point adjustment in this case can be performed by a mechanism as simple and effective as possible. This purpose was achieved by moving the pivot of the pivoting lever.

The gist of the present invention will be explained below based on the embodiments shown in the drawings.

Reference numeral 1 denotes a step board, which covers the board 2 and has horizontal rods 4.5 having fulcrums 3 at the four corners of the board 2, so that the weight is concentrated on the collecting board 6.
A leaf spring 9.
It is supposed to be supported by 9.

10 is an elevation frame that rotates in conjunction with the operation of the operating rod 7;
Transmission is made to a rotating lever 13 by means of a relay lever 12 which is pivotally supported on this.

The rotating lever 13 is pivoted 15 on the support frame 14 and pulled by a contraction spring 29.

As shown in FIG. 3, the support frame 14 includes a bottom plate 17 having guide holes 16 in each of the four corners, and opposing side walls 18.
It consists of a top wall 19 spanning the upper edge of the side wall, and the guide hole 1
The screw 20 is fixed to the substrate 2 through the screw 20 so as to be movable in a fixed direction.

The rotating lever 13 is pivotally supported 15 on this support frame, and
4 is prevented from moving in the axial direction by the side wall 21 of the substrate 2, but the screw 23 of the rotatable shaft 22 is screwed into one side wall and is further compressed by the expansion spring 24, so that the heir 25
The support frame 14 is caused to slide through the guide hole 16 and the screw 20 by the rotation of the support frame 14.

The above-mentioned relay lever 12 is located in the middle of the rotary lever 13.
The distal end of the rack 27 that rotates the weight scale plate 26 is pivoted 25 , and the base end of the rack 27 that rotates the weight scale plate 26 is pivoted 28 on the distal end of the rotating lever 13 .

These pivot supports 25 and 28 have a distance of 1:2 with respect to the pivot support 15, and therefore, the amount of rotation of the pivot support 25 based on the rotation of the rotation lever is equal to the amount of rotation of the pivot support 28. It becomes 1/2.

In the device of the present invention having such a configuration, the footboard 1
The above load causes the elevating frame 10 to move downward in response to the downward movement of the operating rod 7, and the relay lever 12 connected thereto is moved to the upper right in FIG. Rotates counterclockwise around the center in the diagram.

This rotation causes the rack 27 to expand.

Therefore, in order to align the weight scale plate to the 0 point during measurement,
When the eldest child 25' is tilted or rotated in one direction, the support frame 14 is moved to the left or right along the guide hole 16 by the shaft 22.

Since this movement also causes the shaft support 15 to move, the rotating lever 13 is rotated around the shaft support 25 of the relay lever 12, and moves the rack 27 via the shaft support 28.

Therefore, it is easy to align the zero point of the scale plate with the index.

As described above, according to the present invention, the zero-point translation section of the ultra-slim weighing scale equipped with a double enlargement mechanism can be adjusted by manipulating the eldest child into the support frame 14.
By moving itself and moving the shaft support 15 attached to it, it is possible to easily adjust the zero point, and the relay lever that forms the center of operation is not influenced by the sides, making it accurate. It is extremely effective in weight scales equipped with a double magnification mechanism, has a simple structure, and has many practical advantages.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a weighing scale equipped with the device of the present invention with the step plate removed, FIG. 2 is a partially cutaway side view thereof, and FIG. 3 is a perspective view of the device of the present invention. 1...Treadboard, 2...Board, 3...
...Fully point, 4,5...Horizontal rod, 6...Aggregation plate, 7...Operating rod, 8...Horizontal rod, 9
...Plate spring, 10...Elevation frame, 11,
15゜25.28...Axis support, 12...
・Relay lever 13... Rotating lever, 14...
...Support frame, 16...Guide hole, 17...
...Bottom plate, 18...Side wall, 19...
Top wall, 20... screw, 21... side wall,
22...Shaft, 23...Thread, 24...
...Expansion spring, 25... legitimate child, 26...
...Weight scale plate, 27...Rack.

Claims (1)

[Claims for Utility Model Registration] The tip of the relay lever 12, which moves due to the load on the footboard 1, is pivoted in the middle of the pivot lever 13, one end of which is pivoted by the shaft support 15. This is an ultra-thin weight scale in which the base end of a rack 27 that rotates a scale plate 26 is pivotally supported, in which the pivot support 15 of the rotary lever 13 is installed on a support frame 14 that is movable on the scale board 2, O in an ultra-thin weight scale characterized in that the pivot support 15 is moved by the movement of the support frame 14, and the weight scale plate 26 is rotated.
Point adjustment device.