Slider for slide fastener

1. A slider for a slide fastener comprising:

a slider main body configured to engage and disengage a pair of fastener elements;

a pull tab which is attached to a pull tab attachment portion of the slider main body;

a stopper hook having one end configured to be engaged with the fastener elements to stop the slider main body from moving;

a spring portion;

a cam portion, wherein when the pull tab pivots from a lie-down state to an erected state, the cam portion contacts the spring portion and an elastic force of the spring portion urges the pull tab in a direction in which the pull tab returns to the lie-down state where the pull tab is lying down toward one side of the slider main body; and

regulating portions configured to stop the pull tab from pivoting further from the erected state, so that the pull tab is prevented from lying down to the other side of the slider main body,

wherein the regulating portions comprise:

pull tab-side regulating portions which are formed on the pull tab; and

slider-side regulating portions which are formed on the slider main body,

wherein the pull tab-side regulating portions are configured to abut against the slider-side regulating portions to stop the pull tab from pivoting further from the erected state,

wherein the slider main body is comprised of a slider body and a cover body which is fixed to the slider body,

wherein the cover body comprises a receiving portion which receives the stopper hook and the spring portion, and

wherein the slider-side regulating portions are formed in a part of the cover body.

2. The slider according to claim 1 ,

wherein the pull tab has a shaft portion, a pair of connecting rods which are connected to the shaft portion, and a knob portion which is connected to the pair of connecting rods, and

wherein the pull tab-side regulating portions are provided on at least one of the shaft portion and the pair of connecting rods of the pull tab.

3. The slider according to claim 2 , wherein the pull tab-side regulating portions and the cam portion extend toward a pull tab opening portion which is defined by the shaft portion, the pair of connecting rods and the knob portion.

4. The slider according to claim 2 ,

wherein the cover body further comprises

an opening portion provided with a partition plate which comes into contact with the shaft portion to pivotably hold the pull tab, and

wherein the slider-side regulating portions are formed on a circumferential wall of the opening portion.

5. The slider according to claim 2 , wherein the shaft portion of the pull tab contacts an upper blade of the slider main body due to the elastic force of the spring portion through the stopper hook.

6. The slider according claim 1 , wherein the regulating portions stop the pull tab from pivoting further from the erected state in a direction toward the other side of the slider main body when the spring portion contacts an end point of a cam surface of the cam portion.

7. The slider according to claim 1 ,

wherein the lie-down state is a state where the pull tab is lying down toward a rear mouth side of the slider main body,

wherein the pull tab-side regulating portions are formed on an upper surface of the pull tab in the lie-down state, and

wherein the slider-side regulating portions are formed at positions that face the upper surface of the pull tab when the pull tab pivots toward a shoulder mouth side of the slider main body.