JP2562977Y2 - Shock absorber for scale entrance and exit in tape measure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape measure, and more particularly to an apparatus for absorbing a shock applied to an entrance and exit when a tape measure is unwound to prevent breakage of a hook hook attached to the tip of the scale.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 1-81510 discloses a structure for absorbing an impact generated at the entrance of a tape measure scale. It is not possible to absorb the shock sufficiently to use it.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a device capable of reliably absorbing and absorbing the shock generated when the scale is unwound with a simple structure.

[0004]

The means of the present invention are as follows. A buffer frame through which the scale penetrates is accommodated in the inside of the scale outlet of the case body so as to be able to move forward and backward, and the buffer frame has a buffer receiving surface against which the bent tip abuts when rewinding the scale,
A pair of elastic strips formed on the inner surface of each of the front divided case body and the rear divided case body and in contact with the tapered surfaces of the respective guide projections inclined upward toward the outlet. A shock absorbing device for a scale entrance / exit in a tape measure.

[0005]

When the drawn scale is released, the scale is rapidly rewound, and the hook 19 at the tip strongly hits the shock absorbing frame 20 provided in the outlet 18 to move the shock absorbing frame 20 backward. At this time, the elastic strips 24a and 24b which are in contact with the tapered surface 25a of the left and right guide projection 25 are bent while being pressed by the tapered surface 25a as shown in FIG. Stops with the tip curved downward. Thereafter, the elastic strips 24a and 24b return to the state shown in FIG. 1, and the buffer frame 20 also advances to the original position.

[0006]

1 and 2, reference numeral 11 denotes a case body which combines a front divided case body 11a and a rear divided case body 11b to form a set screw 13 through a center hole 12 of the divided case body 11b. The screw 17 is screwed into the shaft tube 14 of the case body 11a and stopped, and the base end of the winding spring 15 is locked and wound on the shaft tube 14. The winding spring 15 is acted on the drum 16, and the tip of the scale 17 wound on the drum 16 And the hook 19 is attached to the tip of the scale 17. In the present invention, a plastic buffer frame 20 having the structure shown in FIGS. When viewed from the front, the shock-absorbing frame 20 is a flat rectangular tube and has a lower surface 20 a and an upper surface 20 b
And left and right side surfaces 20c and 20d.
The front end of the upper surface 2 is formed as an impact receiving surface 21, and an inclined groove 22 is provided to minimize the contact with the scale 17.
Reference numeral 0b contacts the support pieces 23 formed on the divided case bodies 11a and 11b, and the buffer frame 20 is accommodated in the case body 11 so as to be able to move forward and backward. Elastic strips 24a, 24b are horizontally and integrally protruded from the left and right side faces 20c, 20d, and tapered surfaces 25a of upwardly inclined guide protruding pieces 25 protruding at their ends from inner surfaces of the divided case bodies 11a, 11b. When the hook frame 19 at the end of the scale hits the impact receiving surface 21 and the buffer frame 20 is retracted during the rewinding of the scale, the elastic strips 24a and 24b are bent by the inclined guide protruding pieces 25 at the ends of FIG. In this way, the impact is reduced to protect the fixing portion of the hook 19 attached to the outlet and the tip of the scale.

[0007]

According to the present invention, elastic strips 24a, 24 are provided.
b absorbs the impact by hitting the tapered surface 25a, so that it can withstand a strong impact force and absorb the impact reliably to prevent damage to the outlet and breakage of the hook-shaped hook mounting portion at the tip of the scale. Can be.

[Brief description of the drawings]

FIG. 1 is a side view with a part removed.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a longitudinal sectional side view of a main part.

FIG. 4 is a front view of a buffer frame.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Case main body 11a Front divided case body 11b Rear divided case body 17 Scale 18 Outlet 19 Hook-shaped hook 20 Buffer frame 20a Lower surface 20b Upper surface 20c Side surface 20d Side surface 21 Impact receiving surface 24a Elastic strip 24b Elastic strip 25 Guide Projection piece 25a Tapered surface

Claims (1)

(57) [Scope of request for utility model registration] 1. A buffer frame through which a scale penetrates is accommodated inside a scale outlet of a case body so as to be able to move forward and backward. A pair of elastic strips formed on the inner surface of each of the case body and the rear divided case body and in contact with the tapered surfaces of the respective guide projections inclined upward toward the outlet. Shock absorbing device at the entrance and exit of the scale in the measuring tape.