CN107613803B - Slider of slide fastener - Google Patents

Abstract

The invention can stabilize the standing state of the pull tab of the zipper. A slider for a slide fastener is characterized by comprising: a pair of first groove portions (2a2) recessed in the upper surface of the upper blade (2a) at positions located on the left-right direction outer sides with respect to the pair of shaft holes (2e4 ); and a pair of contact portions (2a4, 2a5) which are in contact with the tip end surfaces of the arms (3c, 3c) of the pull tab (3) in the standing state near the shaft (3b) on the upper surface and in the front and back of each 1 st groove portion.

Description

Slider of slide fastener

Technical Field

The present invention relates to a slider of a slide fastener of the type including a body, a pull tab, and a lock pin.

Background

As an example of the above slider, there is a slider having: a main body having a fastener guide path therein and a pair of pull-tab mounting posts on an upper surface thereof; a tab having a shaft rotatably supported by a pair of tab attaching posts, a cam protruding to an outer peripheral side of the shaft, a grip portion separated from the shaft, a pair of arms joining both end portions of the shaft to the grip portion, and a lock pin attached to a main body and elastically deformed by the cam (patent documents 1 and 2).

In the sliders of patent documents 1 and 2, when the pull tab is in a state of being laid down with respect to the body, the claw of the lock pin protrudes toward the element guide path, and the slider cannot move with respect to the pair of element rows. On the other hand, in these sliders, when the tab is in a standing state with respect to the body, in other words, when the tab is pinched by fingers and lifted, the pawl does not protrude toward the element guide path in the body, and the slider can move forward and backward with respect to the pair of element rows.

However, when the tab is in the standing state, the relationship between the upper surface of the body and the tab is as follows. In the slider of patent document 1, a gap is provided between the end surfaces of the pair of arms on the side of the shaft and the upper surface of the body. In the slider of patent document 2, the front portion of the end surface of each arm on the shaft side is in contact with the upper surface of the body, and a gap is provided between the rear portion of the end surface of each arm on the shaft side and the upper surface of the body. More specifically, the slider of patent document 2 is formed with a pair of groove portions in which a gap is present between a rear portion of the end surface of each arm on the shaft side and the upper surface of the main body, the rear portion being located on the outer side in the width direction of the pair of tab attaching posts, in the upper surface of the main body.

As described above, in the sliders of patent documents 1 and 2, the end surfaces of the pair of arms on the side of the shaft are in an unstable state when the pull tab is in the standing state. When the tab is in the standing state, the lock pin is elastically deformed by the cam and generates a restoring force, so that when the finger releases the tab, the tab is in the collapsed state by the restoring force of the lock pin.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-31691

Patent document 2: WO2014-064753

Disclosure of Invention

Problems to be solved by the invention

However, it is sometimes convenient if the standing state of the tab can be stably maintained. For example, when the slider is attached to a pair of fastener stringers of a slide fastener, the claws do not project toward the element guide path as long as the tab is in the standing state, and therefore, the pair of element rows can be easily inserted into the element guide path. In particular, when the slider is threaded onto the pair of element rows by an automatic machine, the tab can be held in an upright state, which facilitates the attachment of the slider.

In the case where the tab is a die-cast product, the tip end surface of each arm on the side of the shaft is formed in a V shape that gradually protrudes from both ends in the thickness direction of the tab toward the center, or a protrusion is provided in the center in the thickness direction of the tab, as viewed from the extending direction of the shaft. The V-shape is formed by utilizing the inclination for die stripping of the die-casting die. On the other hand, the convex portion is formed of a material filled in a gate of the die casting mold.

However, if the tip end surface of each arm on the side of the axis is formed in the above shape, the tip end surface of each arm on the side of the axis is brought into contact with the upper surface of the body in order to hold the tab in the standing state, and in this case, each arm is brought into contact with the upper surface of the body at the center portion in the thickness direction, i.e., the V-shaped tip end portion or the convex portion, and a gap is formed between both end portions in the thickness direction and the upper surface of the body, and therefore, the tab is unstable.

The present invention has been made in view of the above circumstances, and an object thereof is to stabilize the standing state of a pull tab.

Means for solving the problems

A slider of a slide fastener of the present invention includes a body, a pull piece, and a lock pin. The main body includes: an upper wing plate and a lower wing plate which are opposite to each other up and down; a connecting column for connecting the upper wing plate and the lower wing plate vertically at the front end part of the upper wing plate and the front end part of the lower wing plate; a pair of pull tab mounting posts standing on the upper surface of the upper wing plate in a state of being opposed to each other in the left-right direction; a fastener element guide path which is branched into two strands by a connecting column between the upper wing plate and the lower wing plate; and a pair of shaft holes formed in the pair of pull-tab mounting posts and penetrating the pair of pull-tab mounting posts in the left-right direction. The pull tab includes: a grip portion; a shaft rotatably supported by the pair of shaft holes; a cam protruding from an outer periphery of the shaft; and a pair of arms for connecting the left and right ends of the shaft and the hand grip. The locking pin includes: a locking pin body part which is arranged on the upper surface of the upper wing plate and is contacted with the cam; and a claw extending downward from an end portion of the lock pin body portion opposite to the end portion attached to the upper blade. The upper wing plate includes: a pawl hole vertically penetrating the upper wing plate and allowing the pawl to enter and exit the element guide path; a pair of first groove portions 1 recessed in the upper surface of the upper blade at positions located on the left and right outer sides with respect to the pair of shaft holes; and a pair of contact portions which are in contact with the tip end surfaces of the arms of the pull tab on the shaft side in the standing state, on the upper surface of the upper paddle and in the front and rear of the 1 st groove portion.

When the center of the front-rear width of the pair of first groove portions 1 is set as the center point L, there is no problem whether or not the center point L is located directly below the center line passing through the centers of the pair of shaft holes. However, in order to stably bring the tip end surfaces of the arms into contact with the front and rear of the 1 st groove portion when the tab is in the standing state, the following is desirable.

That is, the center point L, which is the center of the front-rear width of the pair of first groove portions 1, is located directly below the center line passing through the centers of the pair of shaft holes.

The portion of the upper surface of the upper flap located outside the pair of tab attaching posts may be recessed only in the 1 st groove portion, but in order to stabilize the standing state of the tab, the following is desirable.

That is, the pair of contact portions are the 2 nd groove portions, which are recessed in the front and rear of the 1 st groove portion on the upper surface of the upper paddle and are shallower than the 1 st groove portion.

There is no problem in which relationship the cam contacts the lock pin body portion when the tab is in the erected state. However, in order to stabilize the standing state of the tab, the following is desirable.

That is, the cam and the lock pin main body portion are respectively provided with planar portions which are in surface contact with each other when the tab is in the standing state.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the slider of the present invention, when the tab is in the standing state, the tip end surface of the arm on the shaft side contacts the pair of contact portions in the front and rear of the 1 st groove portion, and the tab is prevented from falling forward and backward, so that the standing state of the tab is stabilized.

Further, according to the slider in which the center point L, which is the center of the front-rear width of the pair of first groove portions 1, is located directly below the center line passing through the center of each of the pair of shaft holes, the tip end surfaces of the respective arms more stably contact the front and rear sides of the first groove portions 1 when the tab is in the standing state, and the standing state of the tab is stable, as compared to the case where the center point L, which is the center of the front-rear width of the pair of first groove portions 1, is offset directly below the center line of the pair of shaft.

Further, according to the slider in which the pair of contact portions are the 2 nd groove portion recessed in the upper surface of the upper blade and shallower than the 1 st groove portion, when the pull-tab is in the standing state, the tip end surface of each arm on the shaft side is accommodated in the 2 nd groove portion, and the standing state of the pull-tab is more stable.

Further, according to the slider in which the cam and the lock pin body portion are respectively provided with the flat surface portions which are in surface contact with each other when the tab is in the standing state, the restoring force of the lock pin body portion is applied perpendicularly from each arm to the upper blade plate, and the standing state of the tab is more stable.

Drawings

Fig. 1 is an exploded perspective view showing a slider according to a first embodiment of the present invention before assembly.

Fig. 2 is a perspective view showing the slider according to the first embodiment.

Fig. 3 is a plan view showing the slider according to the first embodiment.

Fig. 4 is a plan view showing the body of the slider before the tab is attached.

Fig. 5 is a cross-sectional view showing a state of the slider according to the first embodiment before assembly, as viewed from the right side.

Fig. 6 is a sectional view taken along line VI-VI of fig. 3.

Fig. 7 is a sectional view taken along line VII-VII of fig. 3.

Fig. 8 is a sectional view taken along line VIII-VIII of fig. 3.

Fig. 9 is a cross-sectional view showing the relationship between the cam and the locking pin when the pull tab is in an inclined state.

Fig. 10 is a cross-sectional view showing the relationship between the pull tab and the upper wing plate when the pull tab is in an inclined state.

Fig. 11 is a sectional view showing a state of the lock pin when the tab is in a standing state.

Fig. 12 is a cross-sectional view showing the relationship between the tab and the upper flap when the tab is in a standing state.

Fig. 13 is an enlarged cross-sectional view of an example of the relationship between the tab and the upper flap when the tab is in the erected state.

Detailed Description

The slide fastener is provided with: a pair of fastener tapes each having a fastener element row at opposite side edges of the pair of fastener tapes; and a slider which moves along the pair of element rows, and a plurality of elements constituting the pair of element rows are engaged or disengaged by the movement of the slider.

The directions used in the following description are based on fig. 3. The moving direction of the slider 1 is referred to as a front-rear direction and is a vertical direction in fig. 3. The front direction is a direction in which the coupling elements are engaged in the moving direction of the slider 1, and is an upper direction in fig. 3. The rear direction is a direction in which the elements are separated in the moving direction of the slider 1, and is a lower direction in fig. 3. The width direction of the slider 1 is referred to as a left-right direction, and is a direction facing a pair of element rows passing through the slider 1. The left direction is the left direction of fig. 3, and the right direction is the right direction of fig. 3. The height direction of the slider 1 is referred to as the vertical direction and is a direction perpendicular to the paper surface of fig. 3. The upper direction is a forward direction in a direction perpendicular to the paper surface of fig. 3, and the lower direction is a depth direction in a direction perpendicular to the paper surface of fig. 3.

As shown in fig. 1 to 3, a slider 1 according to a first embodiment of the present invention includes: a main body 2 provided with an element guide path 21 therein; a pull tab 3 swingably attached to the main body 2; and a lock pin 4 attached to the body 2 and including a claw 4d that moves in and out of the element guide path 21. The body 2, the tab 3, and the lock pin 4 may be made of any material, but it is preferably made of metal such as aluminum alloy, zinc alloy, and copper alloy. More preferably, the main body 2 and the tab 3 are die-cast products, and the lock pin 4 is a press-molded product.

The pull tab 3 includes: a grip portion 3a for being held by fingers; a shaft 3b extending in the left-right direction at a position spaced apart from the hand grip 3 a; a pair of arms 3c, 3c for joining the left and right ends of the shaft 3b to the hand grip 3 a; a cam 3d projecting from a middle portion in the left-right direction of the shaft 3b to the outside in the radial direction of the shaft 3 b; and a projection 3e projecting from a distal end surface of each arm 3c on the shaft 3b side. The pull tab 3 is a rectangular flat plate as a whole, and a through hole 3f penetrating in the thickness direction is formed in the vicinity of one side thereof.

The cam 3d projects from the shaft 3b toward the gripper portion 3a, and as shown in fig. 6 and 11, the leading end surface 3d1 thereof is a flat surface portion 3d1 which becomes a horizontal surface when the tab 3 is in the standing state.

As shown in fig. 7 and 12, each arm 3c extends linearly in the radial direction of the shaft 3b when viewed in the width direction. More specifically, each arm 3c extends from the grip portion 3a toward the shaft 3b as viewed in the width direction, and a tip end portion thereof extends to a position farther from the grip portion 3a with respect to the shaft 3 b. An end face of the tip end of each arm 3c, that is, a tip end face is an end face located on the opposite side of the grip 3a, and is a lower face when the pull tab 3 is in the standing state. The front and rear end portions (both corner portions) of the tip end surface of each arm 3c are a pair of curved surface portions 3c1, 3c1, and the front and rear intermediate portion of the tip end surface is a flat surface portion 3c 2. The pair of curved portions 3c1 and 3c1 are formed such that, when the tab 3 is in the standing state, the front end portion of the tip end surface of the arm 3c rises so as to bulge in an arc shape toward the front end and the rear end portion rises so as to bulge in an arc shape toward the rear end when viewed in the width direction. The flat portion 3c2 is a surface substantially orthogonal to the extending direction of the arm 3c when viewed in the width direction, and is a horizontal surface when the tab 3 is in the standing state. A convex portion 3e is formed so as to protrude from a middle portion in the front-rear direction and a middle portion in the width direction of the flat portion 3c 2.

The convex portion 3e has a semicircular bulge shape when viewed in the width direction as shown in fig. 12.

The main body 2 mainly includes: an upper wing plate 2 a; a lower blade 2b facing the upper blade 2a with a space therebetween below the upper blade 2 a; a connecting column 2c that connects the upper blade 2a and the lower blade 2b vertically at the respective front end portions and at a portion that is a widthwise intermediate portion; a pair of flanges 2d, 2d projecting from both ends in the width direction of at least one (in the illustrated example, both) of the upper blade 2a and the lower blade 2b in a direction in which the vertical interval is narrowed; a pair of tab attaching posts 2e, 2e standing on the upper surface of the upper blade 2a at positions that are intermediate portions in the width direction in a state of facing each other at a left-right interval. The main body 2 includes, in addition to the upper blade 2a, the lower blade 2b, the connecting column 2c, and the flanges 2d, and …: a pair of raised portions 2f, 2f raised from positions located on the front side with respect to the pair of tab attaching posts 2e, 2e and located on the outer side in the width direction with respect to the lock pin 4 on the upper surface of the upper blade 2 a; a pair of bent portions 2g, 2g located on the upper surface of the upper blade 2a and located on the front side with respect to the pair of raised portions 2f, and covering the lock pin 4 from above by bending from both sides in the width direction; and a pair of projections 2h, 2h which contact the tab 3, which is in a state of being laid down to the rear side, at the rear part of the upper surface of the upper paddle 2 a.

In addition, the internal space of the main body 2 includes an element guide path 21 through which the pair of element rows pass and a tape groove 22 through which the fastener tape passes.

The element guide path 21 is formed by vertically dividing an upper blade 2a and a lower blade 2b, and a front-side width-direction intermediate portion is divided left and right by a coupling post 2c, so that the element guide path 21 is Y-shaped, i.e., a shape that penetrates in the front-rear direction and the front side branches into two strands.

In the illustrated example, each of the grooves 22 is defined by upper and lower flanges 2d, 2d at the end in the width direction of the upper blade 2a and the end in the width direction of the lower blade 2b, and the inner side in the width direction communicates with the element guide path 21 and the outer side in the width direction is open to the outside.

As shown in fig. 2, each pull-tab attaching post 2e is constituted by a front post 2e1 and a rear post 2e2 projecting from the upper surface of the upper panel 2a in a state of being opposed to each other in the front-rear direction. As shown in fig. 1 and 5, the front pillar 2e1 and the rear pillar 2e2 are separated from each other in the front-rear direction at a portion other than the lower end portion at the stage before the tab 3 is attached, and are continuous in the front-rear direction at the lower end portion, and the upper surface of the continuous portion is formed in an arc shape as viewed in the width direction. Therefore, the front pillar 2e1 and the rear pillar 2e2 include a shaft receiving portion 2e3 that is recessed in a U shape when viewed in the width direction at a stage before the tab 3 is attached. As shown in fig. 7, the front pillar 2e1 and the rear pillar 2e2 are deformed so that upper portions thereof approach each other in the front-rear direction at a stage after the tab 3 is attached, and are provided with a shaft hole 2e 4.

Each shaft hole 2e4 is substantially circular as viewed in the width direction as shown in fig. 7, and as shown in fig. 11, its diameter (front-rear width) R1 is slightly longer than not only the diameter of the shaft 3b but also the maximum dimension W1 of the front-rear width of the tip end portion of each arm 3c in the standing state. Further, each shaft hole 2e4 penetrates the corresponding tab attaching post 2e in the left-right direction. As shown in fig. 3, the pair of shaft holes 2e4 and 2e4 face each other in the left-right direction, the centers C1 and C1 of the pair coincide with each other in the left-right direction, and a straight line connecting the centers C1 and C1 of the pair is a center line L1 of the shaft hole 2e 4. Further, since the lower portion of the shaft receiving portion 2e3 has an arc shape when viewed in the width direction, as shown in fig. 4, a center C0 of the arc exists. Further, a straight line L0 connecting the centers C0 and C0 of the pair of shaft receiving portions 2e3 and 2e3 coincides with a center line L1 of the shaft hole 2e 4.

As shown in fig. 4, the upper wing plate 2a is provided with a pair of holding grooves 2a1, 2a1 on the upper surface thereof at positions further on the outer side in the width direction than the pair of tab attaching posts 2e, 2e for holding the pull tab 3 in the standing state. In the upper surface of the upper panel 2a, the portions of the upper surface that are located on the outer sides in the width direction of the pair of tab attaching posts 2e and 2e, excluding the pair of holding grooves 2a1 and 2a1, are horizontal surfaces.

As shown in fig. 4, 12, and 13, the pair of holding grooves 2a1, 2a1 are recessed on the outer sides in the width direction (left-right direction) with respect to the pair of shaft holes 2e4, 2e4, in other words, directly below the pair of arms 3c, 3c when the tab 3 is in the standing state. Each holding groove 2a1 includes: a1 st groove portion 2a2 recessed directly below the center line L1 of the shaft hole 2e4 and having a depth from the upper surface (horizontal surface) of the upper blade 2a of t 1; the 2 nd groove portion 2a3 is recessed forward and rearward of the 1 st groove portion 2a2, and has a depth dimension from the upper surface (horizontal surface) of the upper blade 2a of t 2.

The 1 st groove portion 2a2 is a portion that accommodates the convex portion 3e of the corresponding arm 3c when the tab 3 is in the standing state, and is recessed deeper than the 2 nd groove portion 2a3, and is formed in an arc shape when viewed in the width direction. The depth dimension is related to t2 < t 1. As shown in fig. 13, the center point L, which is the center of the front-rear width of each of the 1 st groove portions 2a2, is located directly below the center line L1 passing through the centers C1 and C1 of the pair of shaft holes 2e4 and 2e4, respectively.

The 2 nd groove portion 2a3 is a pair of contact portions that contact the tip end surface of the corresponding one of the arms 3c in the front and rear of the projection 3e when the tab 3 is in the standing state, and is formed shallower than the 1 st groove portion 2a 2. More specifically, the 2 nd groove portion 2a3 includes a front groove portion 2a4 located on the front side of the 1 st groove portion 2a2 and a rear groove portion 2a5 located on the rear side, and the front groove portion 2a4 and the rear groove portion 2a5 are a pair of contact portions.

When the tab 3 is in the standing state as shown in fig. 12, the convex portion 3e of the corresponding arm 3c contacts the 1 st groove portion 2a2, and the tip end surface of the corresponding arm 3c contacts the 2 nd groove portion 2a3 (the front groove portion 2a4 and the rear groove portion 2a5) at positions forward and backward of the convex portion 3 e. That is, the holding grooves 2a1 are in contact with the distal end surfaces of the corresponding arms 3c at three points.

In the example of fig. 13, the front groove portion 2a4 includes: a bottom portion 2a6 horizontally extending forward from the 1 st groove portion 2a 2; and a slope portion 2a7 gradually increasing from the front end of the bottom surface portion 2a6 toward the front. The rear groove portion 2a5 and the front groove portion 2a4 have a front-rear symmetrical shape, and include: a bottom portion 2a8 horizontally extending rearward from the 1 st groove portion 2a 2; and a slope portion 2a9 gradually increasing from the rear end of the bottom surface portion 2a8 toward the rear. When the tab 3 is in the standing state, the respective holding grooves 2a1 contact the projection 3e with the 1 st groove portion 2a2, and contact the front and rear end portions (both corner portions) of the tip end surface of the arm 3c with the front and rear (front groove portion 2a4 and rear groove portion 2a5) of the 2 nd groove portion 2a 3. More specifically, in this case, since the shape of the 1 st groove portion 2a2 is such that only the top portion (lower portion) of the projection 3e can be received, the tip of the projection 3e comes into contact with the 1 st groove portion 2a2, and the root portion (upper portion) of the projection 3e protrudes from the 1 st groove portion 2a 2. Therefore, the flat portions 3c2 of the arms 3c do not contact the front and rear bottom portions 2a6 and 2a8 of the 2 nd groove portion 2a3, and the front and rear curved portions 3c1 and 3c1 of the arms 3c contact the front and rear inclined surface portions 2a7 and 2a9 of the 2 nd groove portion 2a 3.

As shown in fig. 4 and 6, the upper panel 2a is provided with a pair of holding grooves 2a1 and 2a1 on its upper surface, an accommodating groove portion 2s for accommodating the front portion of the lock pin 4, and a claw hole 2t into which the claw 4d at the rear portion of the lock pin 4 is inserted.

The housing groove portion 2s is recessed in a stepped manner with respect to the upper surface of the upper wing plate 2 a. The storage groove portion 2s is formed in the middle portion in the width direction, more specifically, between the pair of bent portions 2g and between the pair of tab attaching posts 2e and 2 e. The storage groove portion 2s is formed in the range between the pair of bent portions 2g and between the pair of tab attaching posts 2e and 2e in the front-rear direction, and more specifically, the front end of the storage groove portion 2s is located at substantially the same position as the front end of the bent portion 2g, and the rear end of the storage groove portion 2s is located at the front side of the shaft hole 2e 4. The storage groove portion 2s is recessed deeper at the front end portion than at the rear end portion from the front-rear intermediate portion thereof.

The claw hole 2t penetrates the upper blade 2a along the upper and lower sides of the upper blade 2a, is formed between the pair of tab attaching posts 2e and 2e, more specifically, between the pair of rear posts 2e2 and 2e2 in the width direction, and is formed at a position rearward of the accommodating groove portion 2s and rearward of the shaft hole 2e4 in the front-rear direction.

The pair of projections 2h, 2h are formed at intervals in the width direction at the rear portion of the upper surface of the upper flap 2a, and come into contact with the lower surfaces of the pair of arms 3c, 3c when the tab 3 is in a state of being laid down to the rear side.

Each raised portion 2f protrudes upward from the upper surface of the upper panel 2a between the tab attaching post 2e and the bent portion 2g in a manner that the lock pin 4 is as invisible as possible in the width direction.

The pair of bent portions 2g and 2g protrude upward in a state opposed to each other at a left-right interval from the width direction intermediate portion of the upper surface of the upper blade 2a at a stage before the lock pin 4 is attached, and are bent inward in the width direction so as to approach the tip ends thereof at a stage after the lock pin 4 is attached, thereby restricting the end portion of the lock pin 4 on the side opposite to the claw 4d from moving upward.

As shown in fig. 1, 5, and 6, the lock pin 4 includes: a lock pin body 4a which is an elastically deformable plate of a predetermined shape, is attached to an upper surface of the upper wing plate 2a, and is brought into contact with the cam 3d when the tab 3 is in the standing state; and a claw 4d extending downward from one end of the lock pin main body portion 4a on the cam 3d side in a state where the tab 3 is laid down to the rear side.

The lock pin body portion 4a includes: cover portions 4b covering the upper side and front and rear sides of the shaft 3b at the position of the cam 3 d; and a mounting portion 4c extending forward from a front lower end of the cover portion 4b and mounted to the housing groove portion 2s of the upper blade 2 a.

The mounting portion 4c extends in the front-rear direction, and is formed by bending a front end portion thereof downward.

The cover portion 4b is U-shaped and opens downward, and includes: a central panel 4b1 extending along the front-rear direction; a front panel 4b2 extending downward from the front end of the central panel 4b 1; and a rear panel 4b3 extending downward from the rear end of the central panel 4b 1. The lower surface of the middle portion 4b11 in the front-rear direction of the center piece 4b1 of the cover portion 4b is a flat surface portion 4b11 that is in surface contact with the tip end surface 3d1 of the cam 3d when the tab 3 is in the standing state. The rear lower end of the cover portion 4b (the lower end of the rear piece 4b 3) is continuous with the claw 4 d.

The claw 4d extends downward from the rear end of the rear piece 4b3 of the cover 4 b.

The slider 1 of the first embodiment described above is as follows when the tab 3 is in a state of being laid down to the rear side. As shown in fig. 6, the cam 3d is separated from the cover portion 4b of the lock pin 4, the pawl 4d protrudes from the pawl hole 2t toward the element guide path 21, and the tip end of the pawl 4d presses one element of the pair of element rows, not shown, and holds the slider 1 so as not to move relative to the pair of element rows. As shown in fig. 7, the shaft 3b is rotatably supported by the shaft holes 2e4, 2e4 of the pair of tab attaching posts 2e, and part of the lower surfaces of the pair of arms 3c, 3c is supported by the pair of projections 2h, 2 h. As shown in fig. 8, the pair of arms 3c and 3c do not contact the upper surface of the upper blade 2a except for the pair of projections 2h and 2 h.

In addition, the slider 1 of the first embodiment is as follows in a state where the pull tab 3 is inclined obliquely rearward. As shown in fig. 9, the cam 3d abuts the hood 4b to slightly push the hood 4b upward. As a result, the lock pin 4 is elastically deformed, and a force that presses the shaft 3b downward is generated in the shaft 3b by the restoring force of the lock pin 4. As shown in fig. 10, the rear end portion (curved surface portion 3c1) of the tip end surface of each arm 3c on the shaft 3b side is pressed against the 1 st groove portion 2a 2. At this time, the tab 3 is brought into contact with the upper paddle 2a at two points by the pair of arms 3c, and the restoring force of the lock pin 4 acts, so that the tab falls down to the rear side. Further, assuming that the 1 st groove portion 2a2 and the curved surface portion 3c1 are not present, the rear end portion of each arm 3c is right-angled when viewed in the width direction, and therefore, the upper surface of the upper flap 2a is rubbed with a strong force during the transition from the state in which the tab 3 is laid down to the rear to the state in which it is raised. On the other hand, since the slider 1 of the first embodiment has the 1 st groove portion 2a2 and the curved surface portion 3c1, the corner portion on the rear side of each arm 3c and the upper surface of the upper wing 2a rub against each other with a small force during the above-described transition period, and the tab 3 can be turned with a small force when the tab 3 is transitioned from the state of being laid down to the rear side to the state of being raised, as compared with the case where the 1 st groove portion 2a2 and the curved surface portion 3c1 are not present. For the same reason, when the tab 3 is switched from the state of being laid down to the front to the state of being raised, the tab 3 can be turned with a small force. In a state where the tab 3 is laid down forward, the arms 3c are placed on the raised portions 2f, and the tab 3 does not contact the attachment portion 4c of the lock pin 4.

The slider 1 according to the first embodiment is as follows when the tab 3 is in the standing state. As shown in fig. 11, the cam 3d pushes the cover portion 4b upward, and the pawl 4d is accommodated in the pawl hole 2t without protruding toward the element guide path 21, and is separated from the pair of element rows. At this time, the distal end surface 3d1 (flat surface portion) of the cam 3d comes into surface contact with the flat surface portion 4b11 of the center piece 4b1 of the cover portion 4b, and therefore the restoring force of the lock pin 4 is transmitted to the cam 3d as a downward force. Then, the downward force is applied perpendicularly from each arm 3c to the upper paddle 2a via the cam 3d and the shaft 3b, and the standing state of the tab 3 is stabilized.

As shown in fig. 12, the tip end portions of the arms 3c are housed in the holding groove 2a1, in other words, the tip end portions of the arms 3c enter the 1 st groove portion 2a2 and the 2 nd groove portion 2a3, and the standing state of the tab 3 is stabilized. The projection 3e of the arm 3c contacts the 1 st groove portion 2a2, and the tip end surface of the arm 3c contacts the front groove portion 2a4 and the rear groove portion 2a5 at positions forward and backward of the projection 3 e. That is, the holding grooves 2a1 are in contact with the tip end surface of the corresponding one of the arms 3c at three points. In this way, even when the projection 3e does not completely enter the 1 st groove part 2a2, the tip end surfaces of the arms 3c come into contact with the front and rear surfaces of the 1 st groove part 2a 2. In the case of the tab 3 without the projection 3e, or in the case where the projection length of the projection 3e is shorter than that of the illustrated example, the tip end surface of the arm 3c comes into contact with the holding grooves 2a1 at two points before and after the 1 st groove portion 2a 2. Since the tip end surfaces of the arms 3c contact the respective holding grooves 2a1 at least two points as described above, the pull tab 3 is prevented from falling forward and backward, and the standing state of the pull tab 3 is stabilized.

Further, since the center point L, which is the center of the front-rear width of the pair of first groove portions 2a2, 2a2, is located directly below the center line L1 passing through the centers C1, C1 of the pair of shaft holes 2e4, 2e4, when the tab 3 is in the standing state, the tip end surfaces of the respective arms 3C are stably in contact with the front and rear of the first groove portion 2a2, and the standing state of the tab 3 is stable, as compared to the case where the center point L is offset from the center line L1 of the pair of shaft holes 2e4, 2e 4.

The present invention is not limited to the above-described embodiments, and can be modified as appropriate within a scope not departing from the gist thereof. For example, in the present embodiment, the arm 3c has the projection 3e, but the present invention is not limited to this, and the arm may have a structure without the projection 3 e. In the present embodiment, the upper blade 2a has the configuration having the 2 nd groove portion 2a3, but the present invention is not limited to this, and the configuration may be such that the 2 nd groove portion 2a3 is not provided, and in this case, the tip end surface of each arm 3c may be brought into contact with the upper surface of the upper blade 2a in the front and rear of the 1 st groove portion 2a 2. In the present embodiment, the portions of the upper surface of the upper panel 2a on the outer sides in the width direction of the pair of tab attaching posts 2e and 2e other than the holding groove 2a1 are flat surfaces, but the present invention is not limited to this, and may be a surface having, for example, irregularities.

Description of the reference numerals

1. A slider; 2. a main body; 2a, an upper wing plate; 2a1, holding groove; 2a2, groove 1; t1, depth of the 1 st groove; 2a3, 2 nd groove; t2, depth of the 2 nd groove; 2a4, front groove (contact portion); 2a5, rear groove (contact portion); 2a6, bottom surface portion; 2a7, ramp portion; 2a8, bottom surface portion; 2a9, ramp portion; 2b, a lower wing plate; 2c, a connecting column; 2d, a flange; 2e, a pull piece mounting column; 2e1, front pillar; 2e2, rear pillar; 2e3, a shaft housing; c0, center (shaft housing); l, center point (slot No. 1); l0, straight line; 2e4, shaft hole; c1, center; l1, center line; r1, diameter; 2f, a ridge; 2g, a bending part; 2h, a protrusion; 2s, a housing groove portion; 2t, claw holes; 21. a fastener element guide path; 22. a belt groove is formed; 3. a pull tab; 3a, a gripper part; 3b, a shaft; 3c, an arm; 3c1, curved surface; 3c2, planar portion; w1, the maximum front-rear width of the tip end of the arm; 3d, a cam; 3d1, the tip end surface (planar portion) of the cam; 3e, a convex part; 3f, through holes; 4. a locking pin; 4a, a locking pin main body part; 4b, a cover part; 4b1, center panel; 4b11, the middle part (planar part) of the central piece; 4b2, front panel; 4b3, rear panel; 4c, an installation part; 4d, claws.

Claims (5)

1. A slider for a slide fastener is characterized in that,

the slider of the slide fastener is provided with:

a body (2) comprising: an upper wing plate (2a) and a lower wing plate (2b) which are vertically opposite to each other; a connecting column (2c) which vertically connects the upper blade (2a) and the lower blade (2b) at the front end of the upper blade (2a) and the front end of the lower blade (2 b); a pair of pull tab mounting posts (2e, 2e) standing on the upper surface of the upper wing plate (2a) in a state of facing left and right; an element guide path (21) that is branched into two parts by the connecting post (2c) between the upper blade (2a) and the lower blade (2b) in the vertical direction; a pair of shaft holes (2e 4) formed in the pair of pull tab attaching posts (2e, 2e) and penetrating the pair of pull tab attaching posts (2e, 2e) in the right and left direction;

a pull tab (3) comprising: a grip portion (3 a); a shaft (3b) rotatably supported by the pair of shaft holes (2e4 ); a cam (3d) that protrudes from the outer periphery of the shaft (3 b); a pair of arms (3c, 3c) that engage the left and right end portions of the shaft (3b) with the grip portion (3 a);

a locking pin (4) comprising: a locking pin body part (4a) which is mounted on the upper surface of the upper wing plate (2a) and is in contact with the cam (3 d); a claw (4d) extending downward from an end portion of the lock pin body portion (4a) on the side opposite to the end portion attached to the upper blade (2a),

the upper wing plate (2a) is provided with: a pawl hole (2t) which vertically penetrates the upper blade (2a) and through which the pawl (4d) is inserted into and removed from the element guide path (21); a pair of first groove portions (2a2) recessed in the upper surface of the upper blade (2a) at positions located on the left-right outer side with respect to the pair of shaft holes (2e4 ); and a pair of contact portions (2a4, 2a5) that contact the tip end surfaces of the arms (3c) of the tab (3) in the standing state on the shaft (3b) side, on the upper surface of the upper blade (2a), in the front and rear of the 1 st groove portions (2a 2).

2. The slider for slide fasteners according to claim 1,

the center point (L) of the front-rear width of the pair of first groove parts (2a2) is located directly below the center line (L1) passing through the centers of the pair of shaft holes (2e4 ).

3. The slider for slide fasteners according to claim 1 or 2,

the pair of contact portions (2a4, 2a5) is a2 nd groove portion (2a3) that is recessed on the upper surface of the upper blade (2a) and in the front and rear of the 1 st groove portion (2a2), and is shallower than the 1 st groove portion (2a 2).

4. The slider for slide fasteners according to claim 1 or 2,

the cam (3d) and the lock pin body part (4a) are provided with planar parts (3d1, 4b11) that are in surface contact with each other when the tab (3) is in an upright state.

5. The slider for slide fasteners according to claim 3,

the cam (3d) and the lock pin body part (4a) are provided with planar parts (3d1, 4b11) that are in surface contact with each other when the tab (3) is in an upright state.

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