Sliders and Slide Fasteners

Abstract

[Problem] To provide a slider and a slide fastener that can improve the impact resistance of a cover and also achieve favorable assemblability. [Solution] In a cross-section that is orthogonal to the front-back direction F-B, at least a portion of the gap t11 between an abutting part 45a of a cover body 40 and first abutted parts 24a4 of a pair of first opposite walls 24a is smaller than the gap t12 between a lower surface 41a of an upper wall part 41 of the cover body 40 and first opposite wall upper surface parts 24a3 of the pair of first opposite walls 24a, and at least a portion of the gap t21 between the abutting part 45a of the cover body 40 and second abutted parts 25a of a pair of second opposite walls 25a is smaller than the gap t22 between the lower surface 41a of the upper wall part 41 of the cover body 40 and second opposite wall upper surface parts 25a3 of the pair of second opposite walls 25a.

Description

Technical Field

[0001] The present invention relates to a slider and a slide fastener for opening and closing a pair of fastener strings.

Background Art

[0002] Conventionally, slide fasteners have been widely used for opening and closing parts of, for example, clothes and bags. A slide fastener includes a pair of fastener strings and a slider. The pair of fastener strings is opened and closed by the slider. The slider basically includes a slider body having upper and lower wing plates whose front ends are connected at a predetermined interval by guide posts, and a pull tab for pulling the slider body (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, there has been a slider that attaches a cover body that holds a pull tab movably and rotatably between the upper surface of the slider body. Many such sliders attach the pull tab to the slider body by utilizing the deformation when the cover body is pressed. In order to utilize the deformation of the cover body, if the cover body is thickened, it becomes difficult to deform and the assemblability deteriorates. On the other hand, if the cover body is thinned to improve the assemblability, it may be deformed too much when an impact is applied and may crack.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a slider and a slide fastener capable of improving the impact resistance and assemblability of a cover body.

Means for Solving the Problems

[0006] The slider according to the present invention is a slider including a body, a pull tab, and a cover body, With the side where the pull tab of the slider is located being the upper side and the opposite side being the lower side, when the slider is attached to a fastener chain, the direction in which the slider slides to engage the left and right continuous element rows is the front direction, and the direction in which they are separated is the rear direction. When looking at the slider from above, the left side in the front-rear direction is the left side and the opposite side is the right side, The body has an upper wing plate, a lower wing plate installed at a predetermined interval below the upper wing plate, a guide post that connects the upper wing plate and the lower wing plate in the front, a first column portion that protrudes upward from the front portion of the upper surface of the upper wing plate, and a second column portion that protrudes upward from the rear portion of the upper surface of the upper wing plate, The first column portion includes a pair of first opposing walls facing each other in the left-right direction, The second column portion includes a pair of second opposing walls facing each other in the left-right direction, The pull tab includes a pivot installed between the first column portion and the second column portion, The cover body has an upper wall portion that covers the first column portion, the second column portion, and the pivot, curved portions that curve and extend forward and downward, and backward and downward from the upper wall portion, respectively, support portions that extend downward from the respective curved portions and are supported by the first column portion and the second column portion, and an extension portion that extends downward from the upper wall portion, The extension portion includes two abutting portions that extend downward from the front and rear of the upper wall portion, respectively, The pair of first opposing walls includes a first abutted portion facing the abutting portion and a first opposing wall upper surface portion facing the lower surface of the upper wall portion, The pair of second opposing walls includes a second abutted portion facing the abutting portion and a second opposing wall upper surface portion facing the lower surface of the upper wall portion, In a cross-section orthogonal to the front-rear direction, At least a part of the gap between the abutting portion and the first abutted portion is shorter than the gap between the lower surface of the upper wall portion and the first opposing wall upper surface portion, At least a part of the gap between the contact portion and the second contact portion is shorter than the gap between the lower surface of the upper wall portion and the upper surface portion of the second opposing wall. く, The cover body (40) has a bulging portion (44) that extends downward (D) including the center of the lower surface (41a) of the upper wall portion (41) in the left-right direction (L-R). A part of the bulging portion (44) is disposed between the pair of first opposing walls (24a) and between the pair of second opposing walls (25a). The extending portion (45) extends downward (D) from the left and right end portions of the lower surface (41a) of the upper wall portion (41). It is characterized by this.

Effect of the Invention

[0007] According to the slider and the slide fastener of the present invention, the impact resistance and assemblability of the cover body can be improved.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0009] Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

[0010] FIG. 1 shows a perspective view of the slider of the present embodiment. FIG. 2 shows a separated state of the components constituting the slider of the present embodiment. FIG. 3 shows a side view of the slider of the present embodiment. FIG. 4 shows an enlarged cross-sectional view taken along the arrow IV-IV of FIG. 3. FIG. 5 shows an enlarged cross-sectional view taken along the arrow V-V of FIG. 3.

[0011] In addition, in the following embodiments, the direction is defined as follows: the side where the pull tab 30 of the slider 10 is located is the upper side U, and the opposite side is the lower side D. Also, for other directions, the side where the guide post 23 is located is the front side F, and the opposite side is the rear side B. Further, for other directions, when looking at the slider 10 from above U, with the front side F on top and the rear side B on the bottom, the left side is the left side L and the right side is the right side R. In all cases, arrow U represents upward, arrow D represents downward, arrow F represents forward, arrow B represents rearward, arrow L represents leftward, and arrow R represents rightward.

[0012] The slider 10 used in the slide fastener of this embodiment is composed of four members: a body 20, a pull tab 30, a cover body 40, and a lock body 50. The three members, namely the body 20, the pull tab 30, and the cover body 40, are each manufactured by injection molding using a thermoplastic resin such as polyamide, polypropylene, polyacetal, polybutylene terephthalate, or a thermoplastic resin material added with a wear-resistant reinforcing material. Note that instead of the resin material, metal materials such as aluminum alloy and zinc alloy can be used for the three members of the body 20, the pull tab 30, and the cover body 40, and they can be manufactured by die-casting.

[0013] The lock body 50 of this embodiment is preferably manufactured from a copper alloy, stainless steel, or the like. Note that the lock body 50 may not be installed.

[0014] The body 20 has an upper wing plate 21, a lower wing plate 22, and a guide post 23 that connects the front parts of the upper and lower wing plates 21 and 22. The upper wing plate 21 has flanges 21a that extend downward D at the left and right ends from its rear end to approximately the central position. The lower wing plate 22 has flanges 22a that extend upward U at the left and right ends from its rear end to approximately the central position. The body 20 has a Y-shaped meshing element guide passage between the upper and lower wing plates 21 and 22.

[0015] On the upper surface of the upper wing plate 21 of the body 20, a first column portion 24 stands upright in the front F and a second column portion 25 stands upright in the rear B. The first column portion 24 and the second column portion 25 may be integrally formed with the upper wing plate 21, respectively. A space 60 for accommodating the pivot 31 of the handle is formed between the first column portion 24 and the second column portion 25. That is, in a state before the handle 30 is placed on the upper surface of the upper wing plate 21, the first column portion 24 and the second column portion 25 face each other. On the upper surface of the upper wing plate 21 of the body 20, nothing that obstructs their facing is formed between the first column portion 24 and the second column portion 25.

[0016] The first column portion 24 has a pair of first opposing walls 24a arranged side by side in the left - right direction L - R. When the first column portion 24 is viewed from the side as shown in FIG. 3, each of the pair of first opposing walls 24a has a rising portion 24a1 extending perpendicularly to the upper wing plate 21 from the front F to the rear B, a convex curved portion 24a2 forming a part of a convex curved shape protruding upward U, a substantially horizontal first opposing wall upper surface portion 24a3, a first abutting portion 24a4 inclined downward D, and a concave curved portion 24a5 forming a part of a concave curved shape protruding upward U. Note that the rising portion 24a1 may be provided so as to be inclined with respect to the upper wing plate 21 as long as it does not prevent the engagement and disengagement of the cover body 40 described later. Also, as long as the space 60 can be formed to the extent that it does not prevent the accommodation of the pivot 31 of the handle, the degree of curvature of the concave curved portion 24a5 does not matter and it may be linear.

[0017] As shown in FIG. 2, on the front surface of the first column portion 24, a linear first locking portion 24b extending across the opposing surfaces of the pair of first opposing walls 24a is integrally formed. The first locking portion 24b has a first inclined portion 24b1 that protrudes forward of the rising portion 24a1 of the pair of first opposing walls 24a and whose front surface slopes smoothly downward, and a first engaging portion 24b2 that engages with and disengages from the cover body 40 at the lower end of the first inclined portion 24b1.

[0018] A first concave groove portion 21b is formed from the front end of the center in the left - right direction L - R of the upper surface of the upper wing plate 21 to the front end of the first column portion 24. The first concave groove portion 21b expands the space below D of the first engaging portion 24b2 of the first column portion 24.

[0019] In the second column portion 25, a pair of second opposing walls 25a facing each other in the left - right direction L - R are arranged side by side. When the second column portion 25 is viewed from the side as shown in FIG. 3, each of the pair of second opposing walls 25a has a rising portion 25a1 extending perpendicularly to the upper wing plate 21 from the rear B to the front F, a convex curved portion 25a2 forming a part of a convex curved shape upward U, a substantially horizontal second opposing wall upper surface portion 25a3, a second abutting portion 25a4 inclined downward D, and a concave curved portion 25a5 forming a part of a concave curved shape upward U. Note that the rising portion 25a1 may be provided to be inclined with respect to the upper wing plate 21 as long as it does not prevent the engagement and disengagement of the cover body 40 described later. Also, as long as a space 60 can be formed so as not to prevent the accommodation of the pivot 31 of the handle, the degree of curvature of the concave curved portion 25a5 does not matter and it may be linear.

[0020] On the rear surface of the second column portion 25, a linear second locking portion 25b (not shown) extending across the opposing surfaces of the pair of second opposing walls 25a is integrally formed. Although not shown, the second locking portion 25b has a second inclined portion 25b1 that protrudes rearward from the rising portion 25a1 of the pair of second opposing walls 25a and whose rear surface slopes smoothly downward, and a second engaging portion 25b2 that engages with and disengages from the cover body 40 at the lower end of the second inclined portion 25b1.

[0021] A second concave groove portion 21c (not shown) is formed from the rear end of the center in the left - right direction L - R on the upper surface of the upper wing plate 21 to the rear end of the second column portion 25. The second concave groove portion 21c enlarges the space below D of the second engaging portion 25b2 of the second column portion 25.

[0022] The cover body 40 has an upper wall portion 41 forming the upper surface, front and rear curved portions 42 formed by curving downward D from the front F and rear B of the upper wall portion 41, support portions 43 extending downward D from the curved portions 42, a bulging portion 44 extending downward D including the center of the lower surface 41a of the upper wall portion 41 with respect to the left - right direction L - R, and a pair of extending portions 45 extending downward D from the left and right ends including the center of the upper wall portion 41 with respect to the front - rear direction F - B.

[0023] The upper wall portion 41 of the present embodiment has a smooth convex curved surface with the upper surface facing upward U. By making it a smooth convex curved surface, when the upper surface is pressed during assembly to the first column portion 24 and the second column portion 25, the distance between the front and rear support portions 43 is likely to open. As a result, the cover body 40 can be quickly assembled to the first column portion 24 and the second column portion 25. Note that the upper surface may be a flat surface, a concave curved surface, or the like.

[0024] The curved portion 42 of the present embodiment is formed by smoothly curving downward D from the front F and the rear B of the upper wall portion 41. The support portion 43 is formed below D of the curved portion 42 and is assembled to the first column portion 24 and the second column portion 25. The curved portions 42 and the support portions 43 at the front F and the rear B of the present embodiment have the same shape, and can be quickly assembled to the first column portion 24 and the second column portion 25 without distinction between the front and the rear. Note that the curved portions 42 and the support portions 43 at the front F and the rear B may be formed in different shapes.

[0025] At the lower ends of both support portions 43, engaging pieces 43a that elastically engage and disengage with the first engaging portion 24b2 of the first locking portion 24b and the second engaging portion 25b2 of the second locking portion 25b project inward. It is preferable that the lower surface of the tip of this engaging piece 43a is formed as an inclined surface that slopes upward toward the inside of the cover body 40.

[0026] By forming the lower surface of the tip of the engaging piece 43a as an inclined surface that slopes upward, the engaging piece 43a is smoothly and stably guided with respect to the first inclined portion 24b1 formed in the first locking portion 24b of the first column portion 24 and the second inclined portion 25b1 formed in the second locking portion 25b of the second column portion 25, and can easily and accurately engage with the first engaging portion 24b2 and the second engaging portion 25b2.

[0027] As shown in FIG. 4, the bulging portion 44 of the present embodiment is formed downward D including the center of the back surface of the upper wall portion 41 in the left - right direction L - R. The length of the bulging portion 44 in the left - right direction L - R is shorter than the length of the upper wall portion 41 in the left - right direction L - R, and the width of the bulging portion 44 is set to be smaller than the width of the upper wall portion 41 by the thickness of the pair of first opposing walls 24a and the pair of second opposing walls 25a.

[0028] A part of the bulging portion 44 is inserted into the gap between the pair of first opposing walls 24a of the first column portion 24 and between the pair of second opposing walls 25a of the second column portion 25. In a cross-section orthogonal to the front-rear direction F-B of this part, the cover body 40 is formed in a substantially T shape, and the lower surface 41a of the upper wall portion 41 faces the upper surfaces of the pair of first opposing walls 24a of the first column portion 24 and the upper surfaces of the pair of second opposing walls 25a of the second column portion 25.

[0029] In this way, since a part of the bulging portion 44 is inserted between the pair of first opposing walls 24a of the first column portion 24 and between the pair of second opposing walls 25a of the second column portion 25, the cover body 40 can suppress the left-right movement with respect to the first column portion 24 and the second column portion 25.

[0030] As shown in FIG. 3, each of the pair of extending portions 45 of the present embodiment has a contact portion 45a that extends obliquely downward D from the front and rear of the upper wall portion 41, and a central portion 45b that is formed substantially horizontally in the central portion in the front-rear direction F-B, and protrudes downward D in a wall shape from the left and right end portions respectively. Due to the inclination of the contact portion 45a, the length of the extending portion 45 in the front-rear direction becomes shorter as it goes downward. The central portion 45b will protrude toward the space 60 formed between the first column portion 24 and the second column portion 25. A part of the contact portion 45a in the front F of the extending portion 45 faces the first contacted portion 24a4 of the pair of first opposing walls 24a of the first column portion 24, and a part of the contact portion 45a in the rear B of the extending portion 45 faces the upper surface of the second contacted portion 25a4 of the pair of second opposing walls 25a of the second column portion 25.

[0031] The contact portion 45a of the present embodiment and the first contacted portion 24a4 and the contact portion 45a and the second contacted portion 25a4 are normally installed with a gap and come into contact when the upper wall portion 41 is pressed from above, for example. Note that the contact portion 45a and the first contacted portion 24a4 and the contact portion 45a and the second contacted portion 25a4 may be in contact from the normal state.

[0032] Further, the first abutting portion 24a4 and the second abutting portion 25a4 of the present embodiment are formed to be inclined with respect to the upper wing plate 21 at 45 degrees or less. And the abutting portion 45a is formed so as to face the first abutting portion 24a4 and the second abutting portion 25a4 in a state where the cover body 40 is attached to the first column portion 24 and the second column portion 25.

[0033] By being formed to be inclined with respect to the upper wing plate 21 at 45 degrees or less, the first abutting portion 24a4 and the second abutting portion 25a4 make the abutting angle with the abutting portion 45a closer to horizontal, and the abutting portion 45a can be stably held. Also, when attaching the cover body 40 to the body 20, the assembler can quickly and accurately insert the extending portion 45 between the first column portion 24 and the second column portion 25.

[0034] The slider 10 of the present embodiment includes a locking body 50. The locking body 50 has a leaf spring 51 made of an elastic plate material and a claw member 52 pressed by the leaf spring 51. Both ends of the leaf spring 51 are supported by the first column portion 24 and the second column portion 25. The claw member 52 is installed below D of the leaf spring 51.

[0035] The claw member 52 includes a latching portion 52a and a claw 52b. The latching portion 52a is formed to protrude downward D from one end of the claw member 52. The latching portion 52a is latched to a holding portion (not shown) formed on the first column portion 24. The claw 52b is formed to protrude downward D from the other end of the claw member 52. The claw 52b is installed so as to penetrate the upper wing plate 21 from a hole portion 25c formed in the second column portion 25.

[0036] The handle 30 has a gripping portion 31 formed at one end side and an annular holding portion 32 formed at the other end side. The gripping portion 31 is composed of a long-strip-shaped plate material having a thickness around it. The annular holding portion 32 has a substantially elliptical hole portion that is long in the longitudinal direction into which the first column portion 24 or the second column portion 25 can be fitted. The tip end portion of the annular holding portion 33 is formed in a bridging shape as a pivot 32a that is movably or rotatably arranged in the space 60 formed between the first column portion 24 and the second column portion 25. The pivot 32a is set to be larger than the lateral dimension in the left-right direction L-R of the pair of first opposing walls 24a and the pair of second opposing walls 25a. Note that the handle 30 is not limited to this structure and other structures may also be used.

[0037] Next, the assembly of the slider 10 will be described. First, the assembler inserts the annular holding portion 32 of the handle 30 across the second column portion 25 of the body 20 and places the entire handle 30 in a substantially horizontal posture. Next, the assembler installs the claw member 52 from above U so as to straddle the pivot 32a of the handle 30. The latching portion 52a of the claw member 52 is latched to the holding portion, and the claw 52b penetrates downward D from the hole portion 25c. Next, the assembler installs the leaf spring 51 above U of the claw member 52. The leaf spring 51 may have both ends engaged with the first column portion 24 and the second column portion 25. In this state, the claw member 52 is biased downward D by the leaf spring 51.

[0038] Next, the assembler fits the cover body 40 from above U of the handle 30 onto the first column portion 24 and the second column portion 25. When the upper wall portion 41 of the cover body 40 is pressed downward D, the engaging piece 43a of the support portion 43 contacts the first inclined portion 24b1 and the second inclined portion 25b1. When the upper wall portion 41 is further pressed, the support portion 43 slides on the first inclined portion 24b1 and the second inclined portion 25b1, and the upper wall portion 41 elastically deforms, and the interval between the front and rear support portions 43 gradually opens. Then, when the engaging piece 43a passes through the first inclined portion 24b1 and the second inclined portion 25b1, the upper wall portion 41 elastically returns, and the engaging piece 43a of the support portion 43 engages with the first engaging portion 24b2 of the first column portion 24 and the second engaging portion 25b2 of the second column portion 25. In this state, the assembly of the slider 10 is completed.

[0039] In the case of a conventional slider, when the upper wall portion 41 of the cover body 40 is pressed during assembly or use, the thin-walled portion of the upper wall portion 41 comes into contact with the pair of first opposing walls 24a and the pair of second opposing walls 25a. The thin-walled portion is the end portion of the upper wall portion 41 in the left-right direction L-R in FIG. 4, and is a portion located outside the left-right direction of the bulging portion 44. The thickness of the thin-walled portion in the vertical direction is thinner than the thickness in the vertical direction at the position where the bulging portion 44 is formed in the cover body 40. If the thin-walled portion of the upper wall portion 41 is further pressed while remaining in contact with the pair of first opposing walls 24a and the pair of second opposing walls 25a, an excessive load is applied to the thin-walled portion of the upper wall portion 41 with weak strength, and there is a risk that the upper wall portion 41 may be damaged.

[0040] In order to solve this problem, the slider 10 of the present embodiment is provided with an extension portion 45 on the cover body 40. In a cross-section orthogonal to the front-rear direction F-B of the slider 10 of the present embodiment, at least a part of the gap t11 between the contact portion 45a of the extension portion 45 shown in FIG. 5 and the first contact portion 24a4 of the pair of first opposing walls 24a is shorter than the gap t12 between the lower surface 41a of the upper wall portion 41 shown in FIG. 4 and the first opposing wall upper surface portion 24a3 of the pair of first opposing walls 24a. Also, at least a part of the gap t21 between the contact portion 45a of the extension portion 45 (not shown) and the second contact portion 25a4 of the pair of second opposing walls 25a is shorter than the gap t22 between the lower surface 41a of the upper wall portion 41 and the second opposing wall upper surface portion 25a3 of the pair of second opposing walls 25a.

[0041] Since the gaps t11 and t21 are smaller than the gaps t12 and t22, when the upper wall portion 41 is pressed, the contact portion 45a and the first contact portion 24a4 or the contact portion 45a and the second contact portion 25a4 come into contact with and receive the load earlier than the lower surface 41a of the upper wall portion 41 and the first opposing wall upper surface portion 24a3 or the lower surface 41a of the upper wall portion 41 and the second opposing wall upper surface portion 25a3. As a result, the portion thickened by the extension portion 44 receives the load earlier than the thin-walled portion of the upper wall portion 41, and an excessive load is not applied to the lower surface 41a of the thin-walled portion of the upper wall portion 41, and the breakage of the cover body 40 can be significantly reduced.

[0042] Note that the gap t11 between the contact portion 45a and the first contact portion 24a4 of the pair of first opposing walls 24a may be the same as or different from the gap t21 between the contact portion 45a and the second contact portion 25a4 of the pair of second opposing walls 25a. Also, the gap t12 between the lower surface 41a of the upper wall portion 41 and the upper wall surface portion 24a3 of the pair of first opposing walls 24a may be the same as or different from the gap t22 between the lower surface 41a of the upper wall portion 41 and the upper wall surface portion 25a3 of the pair of second opposing walls 25a. Further, the contact portion 45a, the first contact portion 24a4 of the pair of first opposing walls 24a, and the second contact portion 25a4 of the pair of second opposing walls 25a may be in contact during normal times. In this case, the gap t11 between the contact portion 45a and the first contact portion 24a4 of the pair of first opposing walls 24a, and the gap t21 between the contact portion 45a and the second contact portion 25a4 of the pair of second opposing walls 25a may be 0.

[0043] FIG. 6 shows a side view of a slider according to another embodiment.

[0044] The contact portion 45a, the first contact portion 24a4, and the second contact portion 25a4 are not limited to this shape, and as shown in FIG. 6, they may be formed in a curved surface shape or a stepped shape. Also, the shape of the first contact portion 24a4 may be different from the shape of the second contact portion 25a4. When the shapes of the first contact portion 24a4 and the second contact portion 25a4 are different, the shape of the contact portion 45a may be formed according to the shapes of the first contact portion 24a4 and the second contact portion 25a4. Also, the shape of the first contact portion 24a4 may be changed for each of the pair of first opposing walls 24a. In that case, the shape of the contact portion 45a of each of the pair of extending portions 45 may be formed according to the shape of the first contact portion 24a4 of the pair of first opposing walls 24a facing them. The same can be said for the pair of second opposing walls 25a.

[0045] Since the shapes of the abutting portion 45a, the first abutted portion 24a4, and the second abutted portion 25a4 can be made variously different, the design of the cover body 40 can be diversified. For example, by forming the abutting portion 45a, the first abutted portion 24a4, and the second abutted portion 25a4 in an inclined shape, the load can be received uniformly, and by forming them at 45 degrees or less with respect to the upper wing plate 21, the load can be received in a state close to the horizontal plane. Also, by forming the abutting portion 45a, the first abutted portion 24a4, and the second abutted portion 25a4 in a stepped shape, a stronger load can be received on the horizontal plane.

[0046] In the embodiment shown in FIG. 6, also in a cross section orthogonal to the front-rear direction F-B of the slider 10, at least a part of the gap t31 between the abutting portion 45a of the extending portion 45 and the first abutted portion 24a4 of the pair of first opposing walls 24a is shorter than the gap t32 between the lower surface 41a of the upper wall portion 41 and the upper surface portion 24a3 of the first opposing wall of the pair of first opposing walls 24a. Also, at least a part of the gap t41 between the abutting portion 45a of the extending portion 45 and the second abutted portion 25a4 of the pair of second opposing walls 25a is shorter than the gap t42 between the lower surface 41a of the upper wall portion 41 and the upper surface portion 25a3 of the second opposing wall of the pair of second opposing walls 25a.

[0047] Since the gaps t31 and t41 are smaller than the gaps t32 and t42, when the upper wall portion 41 is pressed, the abutting portion 45a and the first abutted portion 24a4 or the abutting portion 45a and the second abutted portion 25a4 abut against the lower surface 41a of the upper wall portion 41 and the upper surface portion 24a3 of the first opposing wall or the lower surface 41a of the upper wall portion 41 and the upper surface portion 25a3 of the second opposing wall earlier to receive the load, so that an excessive load is not applied to the lower surface 41a of the thin-walled portion of the upper wall portion 41, and the breakage of the cover body 40 is remarkably reduced. Thus, it suffices that the shape is such that the portion thickened by the extending portion 45 abuts against the column portion earlier than the thin-walled portion.

[0048] FIG. 7 shows a slide fastener using the slider of the present embodiment.

[0049] The slide fastener 1 of the present embodiment includes a first fastener stringer 1a in which a first element row 3a composed of a plurality of first elements 3a1 is fixed to a first fastener tape 2a, and a second fastener stringer 1b in which a second element row 3b composed of a plurality of second elements 3b1 is fixed to a second fastener tape 2b. A pair of left and right fastener chains 1ab, and a slider 10 that slides along the left and right continuous element rows 3a, 3b and meshes and separates the elements 3a1, 3b1 of the continuous element rows 3a, 3b.

[0050] Also, in the following description, the direction in which the continuous element row is provided in the longitudinal direction of the fastener chain 1ab is defined as the front-rear direction F-B, the direction in which the slider 10 slides to mesh the left and right continuous element rows 3a, 3b is defined as the front direction F, and the direction in which they are separated is defined as the rear direction B. The left-right direction L-R is a direction that is horizontal on the surface of the fastener chain 1ab and perpendicular to the front-rear direction. The direction perpendicular to the plane defined by the front-rear direction F-B and the left-right direction L-R is defined as the up-down direction U-D. The side where the handle 30 of the slider 10 of the fastener chain 1ab is present is defined as the upper side U, and the opposite side is defined as the lower side D. Regarding the up-down direction U-D as the front-back direction, the upper side U can also be referred to as the front side, and the lower side D can also be referred to as the back side.

[0051] The fastener chain 1ab is composed of a pair of fastener stringers 1a, 1b. The fastener stringers 1a, 1b include a pair of fastener tapes 2ab having an upper surface and a lower surface, and element rows 3a, 3b composed of a plurality of elements 3a1, 3b1 fixed to respective edge portions 2c of the pair of fastener tapes 2ab at predetermined pitches, and the element rows 3a, 3b are arranged so as to face each other.

[0052] Also, an upper stopper 4 is fixed to the upper end of each of the continuous element rows 3a, 3b, and one lower stopper 5 is fixed to the lower end of the continuous element rows 3a, 3b. This prevents the slider 10 from being removed from the upper and lower ends of the continuous element rows 3a, 3b. In the present embodiment, instead of the lower stopper 5, it is also possible to fix an opener having a wing bar and a box bar.

[0053] As described above, the slider 10 of the present embodiment is a slider 10 including a body 20, a handle 30, and a cover body 40. The side where the handle 30 of the slider 10 is present is defined as the upper side U, and the opposite side is defined as the lower side D. When the slider 10 is attached to the fastener chain 1ab, the direction in which the slider 10 slides to engage the left and right continuous element rows 3a and 3b is defined as the front direction F, and the direction of separation is defined as the rear direction B. When the left side in the front-rear direction F-B of the slider 10 is defined as the left side L and the opposite side is defined as the right side R when viewed from above U, the body 20 includes an upper wing plate 21, a lower wing plate 22 installed at a predetermined interval below the upper wing plate 21, a guide post 23 connecting the upper wing plate 21 and the lower wing plate 22 in the front direction F, a first pillar portion 24 protruding upward U from the front portion of the upper surface of the upper wing plate 21, and a second pillar portion 25 protruding upward U from the rear portion of the upper surface of the upper wing plate 21. The first pillar portion 24 includes a pair of first opposing walls 24a facing each other in the left-right direction L-R, and the second pillar portion 25 includes a pair of second opposing walls 25a facing each other in the left-right direction L-R. The handle 30 includes a pivot 32a installed between the first pillar portion 24 and the second pillar portion 25. The cover body 40 includes an upper wall portion 41 covering the first pillar portion 24, the second pillar portion 25, and the pivot 32a, a curved portion 42 curved and extending forward F and downward D, rearward B and downward D from the upper wall portion 41, respectively, a support portion 43 extending downward D from each curved portion 42 and supported by the first pillar portion 24 and the second pillar portion 25, and an extension portion 45 extending downward D from the upper wall portion 41. The extension portion 45 includes two abutting portions 45a extending downward D from the front F and the rear B of the upper wall portion 41, respectively. The pair of first opposing walls 24a includes a first abutted portion 24a4 facing the abutting portion 45a and a first opposing wall upper surface portion 24a3 facing the lower surface 41a of the upper wall portion 41. The pair of second opposing walls 25a includes a second abutted portion 25a4 facing the abutting portion 45a and a second opposing wall upper surface portion 25a3 facing the lower surface 41a of the upper wall portion 41. In a cross-section perpendicular to the front-rear direction F-B, at least a part of the gap t11 between the abutting portion 45a and the first abutted portion 24a4 is shorter than the gap t12 between the lower surface 41a of the upper wall portion 41 and the first opposing wall upper surface portion 24a3, and at least a part of the gap t21 between the abutting portion 45a and the second abutted portion 25a4 is shorter than the gap t22 between the lower surface 41a of the upper wall portion 41 and the second opposing wall upper surface portion 25a3.

[0054] Therefore, when the upper wall portion 41 is pressed, the contact portion 45a with a shorter gap than between the lower surface 41a of the upper wall portion 41 and the upper surface portion 24a3 of the first opposing wall or between the lower surface 41a of the upper wall portion 41 and the upper surface portion 25a3 of the second opposing wall comes into contact with the first contact portion 24a4 or the contact portion 45a comes into contact with the second contact portion 25a4 first to receive the load. Thus, an excessive load is not applied to the lower surface 41a of the thin-walled portion of the upper wall portion 41, the breakage of the cover body 40 can be significantly reduced, the impact resistance of the cover body 40 can be improved, and good assemblability can be achieved.

[0055] Further, in the slider 10 of the present embodiment, when the contact portion 45a comes into contact with the first contact portion 24a4, there is a gap between the lower surface 41a of the upper wall portion 41 and the upper surface portion 24a3 of the first opposing wall. When the contact portion 45a comes into contact with the second contact portion 25a4, there is a gap between the lower surface 41a of the upper wall portion 41 and the upper surface portion 25a3 of the second opposing wall.

[0056] Since the contact portion 45a comes into contact with the first contact portion 24a4 or the contact portion 45a comes into contact with the second contact portion 25a4 to receive the load, an excessive load is not applied to the lower surface 41a of the thin-walled portion of the upper wall portion 41, the breakage of the cover body 40 can be more significantly reduced, and the impact resistance of the cover body 40 can be further improved.

[0057] Further, in the slider 10 of the present embodiment, the cover body 40 has a bulging portion 44 that extends downward D including the center of the lower surface 41a of the upper wall portion 41 in the left-right direction L-R. A part of the bulging portion 44 is disposed between the pair of first opposing walls 24a of the first column portion 24 and between the pair of second opposing walls 25a of the second column portion 25. The extending portion 45 extends downward D from the left and right end portions of the lower surface 41a of the upper wall portion 41.

[0058] Therefore, since a part of the bulging portion 44 is inserted between the pair of first opposing walls 24a of the first column portion 24 and between the pair of second opposing walls 25a of the second column portion 25, the left-right movement of the cover body 40 with respect to the first column portion 24 and the second column portion 25 can be suppressed.

[0059] Further, in the slider 10 of the present embodiment, at least one of the abutting portion 45a, the first abutted portion 24a4, and the second abutted portion 25a4 has an inclined shape that is inclined with respect to the upper wing plate 21. Therefore, by forming the abutting portion 45a, the first abutted portion 24a4, and the second abutted portion 25a4 in an inclined shape, the load can be received uniformly.

[0060] Further, the inclination angle of the slider 10 of the present embodiment with respect to the inclined upper wing plate 21 is 45 degrees or less. Therefore, by forming it at 45 degrees or less with respect to the upper wing plate 21, the load can be received in a state close to the horizontal plane.

[0061] Further, in the slider 10 of the present embodiment, at least one of the abutting portion 45a, the first abutted portion 24a4, and the second abutted portion 25a4 is formed in a stepped shape. Therefore, by forming the abutting portion 45a, the first abutted portion 24a4, and the second abutted portion 25a4 in a stepped shape, a stronger load can be received on the horizontal plane.

[0062] As described above, the slide fastener 1 of the present embodiment includes a pair of left and right fastener chains 1ab having a first fastener stringer 1a in which a first element row 3a composed of a plurality of first elements 3a1 is fixed to a first fastener tape 2a and a second fastener stringer 1b in which a second element row 3b composed of a plurality of second elements 3b1 is fixed to a second fastener tape 2b, and the slider 10 that slides along the left and right continuous element rows 3a, 3b and meshes and separates the elements 3a1, 3b1 of the continuous element rows 3a, 3b.

[0063] Therefore, when the upper wall portion 41 is pressed, the contact portion 45a with a shorter gap than between the lower surface 41a of the upper wall portion 41 and the upper surface portion 24a3 of the first opposing wall or between the lower surface 41a of the upper wall portion 41 and the upper surface portion 25a3 of the second opposing wall, and the first abutted portion 24a4 or the contact portion 45a and the second abutted portion 25a4 come into contact first and receive the load. Thus, an excessive load is not applied to the lower surface 41a of the thin-walled portion of the upper wall portion 41, the breakage of the cover body 40 can be significantly reduced, the impact resistance of the slide fastener 1 can be improved, and good assemblability can be achieved.

Explanation of Reference Numerals

[0064] 1… Slide fastener, 1ab… Fastener chain, 1a, 1b… Fastener stringer, 2ab… Fastener tape, 3a1, 3b1… Element, 3a, 3b… Element row 10… Slider, 20… Body, 21… Upper wing plate, 21a, 22a… Flange, 22… Lower wing plate, 23… Guide post, 24… First column portion, 24a… First opposing wall, 24a3… Upper surface portion of the first opposing wall, 24a4… First abutted portion, 24b… First locking portion, 25… Second column portion, 25a… Second opposing wall, 25a3… Upper surface portion of the second opposing wall, 25a4… Second abutted portion, 25b… Second locking portion, 30… Pull tab, 31… Gripping portion, 32… Annular holding portion, 33… Pivot, 40… Cover body, 41… Upper wall portion, 41a… Lower surface, 42… Curved portion, 43… Support portion, 44… Bulging portion, 45… Extending portion, 45a… Contact portion, 50… Locking body, 51… Leaf spring, 52… Claw member

Claims

1. A slider (10) comprising a body (20), a pull tab (30), and a cover body (40), The side of the slider (10) on which the pull tab 30 exists is defined as the upper side (U), and the opposite side is defined as the lower side (D). When the slider (10) is attached to the fastener chain (1ab), the direction in which the slider (10) is slid to engage the left and right continuous element rows (3a, 3b) is defined as the front side (F), and the direction in which the slider (10) is separated is defined as the rear side (B). When the slider (10) is viewed from above (U), the left side in the front-to-rear direction (F-B) is defined as the left side (L), and the opposite side is defined as the right side (R). The fuselage (20) has an upper wing (21), a lower wing (22) installed at a predetermined distance below (D) the upper wing (21), a guide pillar (23) connecting the upper wing (21) and the lower wing (22) at the front (F), a first pillar portion (24) installed to protrude upward (U) from the front part of the upper surface of the upper wing (21), and a second pillar portion (25) installed to protrude upward (U) from the rear part of the upper surface of the upper wing (21), The first pillar portion (24) includes a pair of first opposing walls (24a) arranged side by side in the left-right direction (L-R), The second pillar portion (25) includes a pair of second opposing walls (25a) arranged side by side in the left-right direction (L-R), The pull tab (30) includes a pivot (32a) disposed between the first post portion (24) and the second post portion (25), The cover body (40) has an upper wall portion (41) that covers the first pillar portion (24), the second pillar portion (25), and the pivot shaft (32a), curved portions (42) that extend from the upper wall portion (41) while curving forward (F) and downward (D) and backward (B) and downward (D), support portions (43) that extend downward (D) from each of the curved portions (42) and are supported by the first pillar portion (24) and the second pillar portion (25), and an extension portion (45) that extends downward (D) from the upper wall portion (41), The extension portion (45) includes two abutment portions (45a) extending downward (D) from the front (F) and rear (B) of the upper wall portion (41), The pair of first opposing walls (24a) includes a first abutted portion (24a4) opposed to the abutting portion (45a) and a first opposing wall upper surface portion (24a3) opposed to a lower surface (41a) of the upper wall portion (41), The pair of second opposing walls (25a) includes a second abutted portion (25a4) opposed to the abutting portion (45a) and a second opposing wall upper surface portion (25a3) opposed to a lower surface (41a) of the upper wall portion (41), In a cross section perpendicular to the front-back direction (F-B), At least a portion of a gap (t11) between the contact portion (45a) and the first contacted portion (24a4) is shorter than a gap (t12) between the lower surface (41a) of the upper wall portion (41) and the first opposing wall upper surface portion (24a3), At least a portion of the gap (t21) between the contact portion (45a) and the second contacted portion (25a4) is shorter than the gap (t22) between the lower surface (41a) of the upper wall portion (41) and the second opposing wall upper surface portion (25a3), The cover body (40) has a bulge (44) extending downward (D) including the center of the lower surface (41a) of the upper wall portion (41) in the left-right direction (L-R), A portion of the bulge (44) is disposed between the pair of first opposing walls (24a) and between the pair of second opposing walls (25a); The extensions (45) extend downward (D) from the left and right ends of the lower surface (41a) of the upper wall portion (41). A slider (10) characterized by:

2. When the abutting portion (45a) and the first abutted portion (24a4) are in contact with each other, a gap is formed between the lower surface (41a) of the upper wall portion (41) and the upper surface portion (24a3) of the first opposing wall, When the abutting portion (45a) and the second abutted portion (25a4) are in contact with each other, a gap is formed between the lower surface (41a) of the upper wall portion (41) and the upper surface portion (25a3) of the second opposing wall. A slider (10) according to claim 1 .

3. At least one of the contact portion (45a), the first contacted portion (24a4), and the second contacted portion (25a4) has an inclined shape inclined with respect to the upper blade (21). A slider (10) according to claim 1 or 2.

4. The inclination angle of the inclined shape with respect to the upper blade (21) is 45 degrees or less. A slider (10) according to claim 3.

5. At least one of the contact portion (45a) and the first contacted portion (24a4) and the second contacted portion (25a4) is formed in a stepped shape. A slider (10) according to claim 1 or 2.

6. a pair of left and right fastener chains (1ab) including a first fastener stringer (1a) in which a first element row (3a) consisting of a plurality of first elements (3a1) is fixed to a first fastener tape (2a) and a second fastener stringer (1b) in which a second element row (3b) consisting of a plurality of second elements (3b1) is fixed to a second fastener tape (2b); A slider (10) according to any one of claims 1 to 5, which slides along the left and right continuous element rows (3a, 3b) and engages and separates the elements (3a1, 3b1) of the continuous element rows (3a, 3b); Equipped A slide fastener (1) characterized by

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