JP3512861B2 - Shock absorber at scale outlet in tape measure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buffer at a scale outlet in a tape measure. 2. Description of the Related Art In a tape measure at present, since the scale is repelled so as to be wound into the main body, there is a disadvantage that the hook with the scale released hits the outlet of the main body and causes an impact. For this reason, as in Japanese Utility Model Laid-Open No. 1-81501, an impact absorbing device that buffers with a ring spring is provided at the outlet of the main body,
As in Japanese Utility Model Laid-Open No. 5-59201, a buffer frame having an elastic strip that bends downward is provided. [0003] However, the conventional one has a drawback that the structure is complicated, that of a ring spring is difficult to form, and that the elastic strip that bends downward does not balance the reaction force due to the deflection. [0004] A tape measure body 1 and a scale 4 having a hook 3 at a tip which is repelled so as to be wound into the tape measure body 1 by the elasticity of a spring. The legs 8, 8 on both sides of the slider 7 provided at the outlet at the lower part of the front face are recesses 9, 9 provided on both sides of the outlet of the tape measure body 1.
The legs 8, 8 are provided with flexible portions 11, 11 extending rearward, and the side walls 12, 12 of the recesses 9, 9 are provided.
The rear portions a, a are inclined so as to approach toward the center. [Operation] The hook 3 is attached to the slider 7 as shown by the arrow in FIG.
1, the slider 7 is pushed rearward as shown by the arrow in FIG. When the hook 3 is pushed and bent, the collision energy of the hook 3 is absorbed and cushioned by this bending. As shown in FIG. 2, a scale 4 having a hook 3 having an L-shaped cross section at its tip is spirally accommodated in a shaft 2 in a tape measure main body 1, and the scale 4 is scaled by a spring (not shown). 4 is repelled so as to be wound into the main body 1. In addition, 5
Is a brake button for locking the scale 4. The front surface 6 is provided with the hook 3
The guide legs 8, 8 provided on both sides of the slider 7 are moved back and forth into recesses 9, 9 provided on both sides of the exit of the tape measure body 1. Fit. The upper surface 10 of the slider 7 has a gutter shape so as to guide the scale 4. The slider 7 is formed from Duracon (trade name). This Duracon is slippery, hard and durable. As shown in FIG. 1, the legs 8, 8 are provided with flexible portions 11, 11 extending rearward, and the rear portions a, a of the side walls 12, 12 of the recesses 9, 9 are inclined so as to approach the center. Let me know. Next, the operation of this device will be described. The scale 4 is pulled forward by the hook 3 from the outlet at the lower part of the front surface of the main body 1, and when the hook 3 is released, the scale 4 is wound around the tape measure main body 1 by the elasticity of the spring. When the hook 3 abuts on the front surface 6 of the slider 7 as shown by the arrow in FIG. 2, the slider 7 is pushed backward as shown by the arrow in FIG. 1
Numeral 1 is bent inward by being pushed inward by the rear inclined surfaces a, a of the side walls 12, 12, thereby absorbing and cushioning the collision energy of the hook 3 by the bending. According to the present invention, since the impact is absorbed by the inward bending of the bending portions 11 of the legs 8 on both sides, the reaction force due to the bending is in the opposite direction. Therefore, no excessive force acts on the slider 7 and the slider 7 is stable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged plan sectional view taken along line II of FIG. 2 according to an embodiment of the present invention. FIG. 2 is a side view showing a partially cutaway cross section of the whole. FIG. 3 is a front view thereof. [Description of Signs] 1 Tape measure main body 3 Hook 4 Scale 5 Brake button 6 for locking 6 Front surface 7 Slider 8 Leg 9 Concave portion 11 Flexible portion 12 Side wall a Rear portion

Claims (1)

(57) [Claims 1] A scale having a tape measure main body and a scale having a hook at a tip which is repelled so as to be wound into the tape measure main body by the elasticity of a spring. The legs on both sides of the slider provided at the exit are fitted to move back and forth into the recesses provided on both sides of the exit of the tape measure body, and these legs are provided with a flexure extending rearward, and the rear portion of the side wall of the recess is centered. A buffer device at a scale outlet of a tape measure, which is inclined so as to be close to each other.